Background technique
The pollutant that soil pollution refers to that mankind's activity generates enters soil, so that soil environment quality has occurred and that or canIt can deteriorate, the generation of biology, water body, air or/and human health be endangered or possible harmful.The risk master of soil pollutionInclude: that Farmland contamination influences agricultural product quality, influences crop growth, cause the underproduction；Endanger Living environment safety of human being, house,Commercially, the soil pollution of the construction lands such as industry may endanger people residence by being orally ingested, breathing the modes such as sucking and skin contactEnvironmental security；Threaten ecological environment security.The life of soil pollution influence plant, animal (such as earthworm) and microorganism (such as rhizobium)Long and procreation, jeopardizes normal soil ecological process and Ecosystem Service, is unfavorable for Soil Nutrient Transformation and fertility is kept, shadowRing the normal function of soil.China's soil environment situation totally allows of no optimist, and the national total exceeding standard rate of soil is up to 16.1%, wherein gentlyMicro-, slight, moderate and serious pollution point ratio are respectively 11.2%, 2.3%, 1.5% and 1.1%, serious soil pollution areaUp to 320, about 5,480,000 hectares.Therefore, China be faced with some areas soil pollution is heavier, arable soil environmental quality causes anxiety,The problems such as industry and mining discarded ground soil environment outstanding problem, are badly in need of a kind of technical solution of effective soil pollution.
The technical principle of contaminated soil remediation may include are as follows: (1) changes pollutant existing forms in the soil or with soilThe combination of earth reduces its transportable property and bioavailability in the environment；(2) reduce soil in harmful substance it is denseDegree.CN200780014195.3 discloses a kind of be used for after heat treating process in situ in subsurface formations at least partThe method for forming shielded layer around area is managed, specifically discloses and sulphur is added in one or more treatment region boundaries being located in stratumWellhole in；Solidify sulphur in the earth formation than the low-melting stratum partial movement of sulphur with permission at least partly sulphur direction to shapeAt shielded layer.The technical solution can be effectively treated the soil remediation problem of oil pollution, but low efficiency and there are secondary pollutionsPossibility.CN201620094652.0 discloses a kind of in-situ remediation system of mobile contaminated soil, including dispensing canister, high pressureGrouting pump, air compressor, high-pressure rotary-spray device and running gear；The dispensing canister, high-pressure injection pump, air compressor, heightPressure rotary-spraying device is each attached to the upper surface of running gear；The dispensing canister outlet is connect with high-pressure injection pump pipeline；The high pressureGrouting pump, air compressor are connected with the drilling machine injecting systems on high-pressure rotary-spray device respectively.The technical solution is taken out in gas phaseIt comprehensively utilizes and is improved in formulation and the principle of chemical leaching, can also have preferably for the Polluted area of low-permeability soilRepairing effect, but be difficult to cope with high pollution environment, there is also the risks of secondary pollution.CN201610474065.9 discloses oneThe restorative procedure and electronic microbial association permeable reactive barrier prosthetic device of kind of cadmium, lead-contaminated soil, specifically include reactive tank,Electrode, power supply and permeable reactive barrier, cadmium to be processed, the lead of filling addition microorganism are dirty between two permeable reactive barriersSoil is contaminated, is adsorbed to the pollutant of electrode transfer by permeable reactive barrier from soil, thus cadmium, lead heavy metal to be processedSoil in remove.Permeable reactive barrier and electric driving method, which is utilized, in the technical solution has a preferable remediation efficiency, but device compared withFor complexity, there are more difficulties for concrete practice.The soil that CN201810158531.1 discloses a kind of more repair mode one is repairedComplex system, including feed module, soil remediation module, microorganism remediation module, transportation module, soil drying module, soil lightRepair module and material discharging module.But microorganism remediation cycle time is longer, and repairs the more difficult cultivation of strain.
To sum up, the soil restoring technology of the prior art is there are low efficiency, the deficiencies of polluting easily diffusion, cause secondary pollution,A kind of big, serious place of organic pollution for contaminated area is still needed to, technical solution that can be efficient and without secondary pollution.
Summary of the invention
It is a kind of in combination situ heat treatment process, gas phase extracting object of the present invention is in view of the deficiencies of the prior art, provideThe soil restoring technology improved on the basis of the principle and advantage of method and permeable reactive barrier, can to place organic contamination intoRow in-situ immobilization not will cause secondary pollution, and remediation efficiency is high, and effect is good, and difficulty of construction reduces, and short time limit can be according to differenceProject field condition is adjusted flexibly.Technical solution of the present invention is as follows.
A kind of situ heat treatment, gas phase extracting and permeable reactive barrier joint renovation of organic pollution soil device, includingIn-situ heat component, gas phase extracting component and permeable reactive barrier component；
The in-situ heat component includes several electromagnetic heating components pierced in contaminated soil region, and the electromagnetism addsHot component includes supporting sleeve and the heating tube that is set to inside supporting sleeve, and contaminated soil table is located at the top of the supporting sleeveSoil layer opening is formed on face, the heating tube is fixedly connected with gas collecting tube on the soil surface, and the heating tube is provided with electricityGas interface can access external power supply, and the supporting sleeve top is cylindrical body, and lower part is triangular pyramids, inside the supporting sleeveCylindrical body and triangular pyramids are separated by bottom plate, several macropores are provided on the outer wall of the supporting sleeve and several are smallHole, in the cylindrical portion, the aperture is arranged in the cylindrical body and the triangular pyramids part, institute for the macropore settingIt states and is evenly arranged with 4 apertures around macropore, the circle center distance of the macropore and the aperture is 3 times of hole diameter,The ratio between the aperture of the macropore and the aperture of the aperture are 1:(4-10)；
Gas phase extracting component includes the gas gathering mask for covering contaminated soil region, inside the gas gathering mask by air hose withBlower connection, the blower are connect with organic matter treating apparatus, and the gas collecting tube of the in-situ heat component is connect with gas pipeline, instituteIt states gas pipeline to be controlled to a vacuum pump, the vacuum pump is connect with the organic matter treating apparatus, and the gas gathering mask is far from blowerOne end air inlet is set, the air inlet is provided with check valve, and the check valve limits gas stream outside the gas gathering maskTo the inside of the gas gathering mask；
The permeable reactive barrier component includes several cylindrical bodies along the setting of contaminated soil pollutant transport directionIt reacts stake and divider wall, the reaction stake includes outer pile body, interior pile body, the pile body surface of the outer pile body is provided with protrusion, instituteIt states interior pile body and is internally provided with infiltration filler, be provided with pile body diaphragm, the outer pile body between the interior pile body and infiltration fillerThe pile body surface of the interior pile body is provided with perforative hole, the infiltration filler to it is lower and on be provided with zeolite layer, phosphorus ashRock layers, zeroth order iron layer, lkd layer and living soil layer, the zeolite layer, the apatite layer, the zeroth order iron layer, the stoneThe ratio between thickness of grieshoch and the living soil layer is (1-2): (2-3): (5-8): (1-2): (1-3)；The reaction stake is along dirtThe dye soil pollutant direction of motion is provided with the first reaction stake layer, the second reaction stake layer and third reaction stake layer, the divider wallThe first reaction stake layer and the are set to including the first divider wall, the second divider wall, third divider wall, first divider wallBetween two reaction stake layers, second divider wall is set between the second reaction stake layer and third reaction stake layer, instituteIt states third divider wall and reacts the same cambered surface of stake layer with third；
The gas gathering mask contaminated soil region position between the second divider wall and third divider wall, the electromagnetismHeating component is no less than 10m at a distance from the reaction stake.
Present invention incorporates situ heat treatment process, gas phase extraction process and permeable reactive barrier advantage, organic matter processing is concentratedIt is disposed, is prevented so that organic pollutant further migrates in the soil in a region, effectively control pollution range.TogetherWhen, so that organic matter is volatilized in a manner of organic matter in In Situ Heating soil in contaminated area, is contained with greatly reducing organic matter in soilAmount, heating method is electromagnetic heating, and heating equipment is electromagnetic heating component.Electromagnetic heating does not need heat transport fluid, such as steam, rightDeeper soil heating is more effective.Electromagnetic heating is not limited by low heat conductivity, supracrustal rocks, heat transport fluid rambunctious etc.,Therefore, soil pollution is handled advantageously than other heating methods.
Wherein, the situ heat treatment process heats the heating tube by the power supply that external power supply provides, then is added by describedBy its heat transfer to adjacent soil, adjacent soil is passed through described in macropore and aperture entrance heat pipe by thermogenetic organic pollutantIn heating tube, the organic gas processing component is drained by the gas collecting tube, after processing qualified discharge.Due to electromagnetism plusHeat has that heating power is high, the rate of heat addition is fast etc. especially compared to resistance heating, needs for row setting macropore and aperture, will be hotAmount passes to soil.The macropore is arranged in the cylindrical portion, and triangular pyramids part, therefore triangular pyramids cannot be arranged inPart might have partially liq entrance, if the hole opened is excessive, liquid will accumulate excessively within a certain period of time, be unfavorable for locatingReason, but if not opening aperture, it may be difficult to detect the disposition of ground end.Not there is electromagnetism in especially triangular pyramids partHeating, prevents hot-spot without releasing energy, and setting aperture just uses enough.Aperture is arranged around macropore, can be formedThe uniform heat-field of one center, four spaced points also can promote adjacent soil and be entered heating tube by thermogenetic organic pollutantInterior, the circle center distance of the macropore and the aperture is 3 times of hole diameter, and heating distribution is more uniform in the case.
The gas phase extracting component seals covering one on the place in contaminated area and electromagnetic assembly heating operation regionGas gathering mask, to collect the organic matter to volatilize in heating process, the power supply heating heating tube provided by external power supply, then byFor the heating tube by its heat transfer to contaminated soil, contaminated soil is entered the heating tube by thermogenetic organic pollutantIt is interior.Gas gathering mask with blower draw the gas containing organic matter, then in gas collecting tube on electromagnetic heating component by vacuum pump extract outGas equally enters organic matter treating apparatus, to recycle organic matter in organic matter or removal gas, to prevent having for volatilizationMachine object enters and pollutes air.
Permeable reactive barrier component, devises the reaction stake of multilayer divider wall system and special designing, and outer pile body can preventSoil corrosion, protrusion can increase frictional force with soil, prevent from burying and occur toppling over and sliding in the soil, and pile body diaphragm can preventFiller extravasation, the bootable organic pollutant of described hole enters inside reaction stake to react with infiltration filler.Zeolite layer conductMatrix, can bearing capacity with higher, other fillers above can be carried, meanwhile, zeolite layer physics with higher is inhaledAttached effect, the permeable reactive barrier based on it can effectively adsorb the Cr VI in water, and not will cause environment pairEffect.Zeroth order iron layer is from a wealth of sources, cheap, has stronger reducing power, the permeable reactive filled using zeroth order iron layerWall technology has been widely used in the processing that the underground water of object etc. is closed containing heavy metal, petroleum hydrocarbon, nitryl aromatic.Therefore, zeroThe usage amount of valence iron layer is the largest.Zeolite layer but under the action of underground water washes away for a long time, by zeolite layer adsorb sexavalenceChromium can be desorbed partially, so that repairing effect is difficult to reach perfect condition, meanwhile, zeroth order iron layer density is larger, when its partial size is less thanWhen the gap of permeable reactive foundation of wall filler, over time, the movement of water flow, zeroth order iron layer can move down streamIt loses, to destroy the reasonable interstitital texture of permeable reactive wall, influences treatment effect.Therefore, between zeolite layer and zeroth order iron layerOne layer of apatite layer is set, and the apatite layer is highdensity hydroxyapatite layer, the bearing capacity of hydroxyapatite layer and boilingRock layers are suitable, and the aperture of the aperture ratio zeolite layer of hydroxyapatite layer is much smaller, can not only help to carry zeroth order iron layer,It can also prevent zeroth order iron layer from moving down, and apatite layer itself has adsorption capacity, zeolite layer can be assisted to adsorb, madeObtaining the heavy metal ion adsorbed in zeolite layer can be held up.Lkd layer has lye, if organic gas entersIt reacts inside stake, it will rise along cylinder, absorbed by lkd layer, organic soil pollution can be effectively treated.Living soil layerReaction stake is sealed for ground, it is simple and convenient, the integrality and safety of filler can be kept.
In particular, herein described gas gathering mask contaminated soil region position between the second divider wall and third divider wallBetween, the electromagnetic heating component is no less than 10m at a distance from the reaction stake.Gas gathering mask is situated between in the position in contaminated soil regionBetween the second divider wall and third divider wall, pollutant can be limited in inside gas gathering mask to greatest extent, it can also be effectiveThe function of permeable reactive barrier is played, the electromagnetic heating component is no less than 10m at a distance from the reaction stake, thus will notIt is evaporated after being heated in the presence of reaction stake attachment organic pollutant, is then dispersed into air and pollutes environment, so as to protectCard in-situ heat component, gas phase extracting component and permeable reactive barrier component can be cooperateed with and be played a role, and administer has to greatest extentMachine contaminated soil.
Preferably, the electromagnetic heating component includes high-frequency heating component, heating in medium frequency component and low frequency heating component.InstituteThe heating tube for stating high-frequency heating component is provided with high frequency heating coil；The heating tube of the heating in medium frequency component is provided with intermediate frequency and addsHeat coil；The heating tube of the low frequency heating component is provided with low frequency heating coil.The high-frequency heating component power frequency is highHeating function is high, and heating in medium frequency component and low frequency heating component heating efficiency are successively decreased.Electromagnetic heating can be divided into low frequency by frequency(10Hz-103Hz), intermediate frequency (103Hz-106) and high frequency (10 Hz6Hz-109Hz).The environment that different heating power supplies uses is differentThe power of sample, heating is different, and when using low-frequency current source, Joule heating (electric conductivity based on substance) is main；It usesWhen high frequency, dielectric heating account for it is leading, the dipole that wherein molecule is formed with the speed proportional to electric field change frequency tend toElectric field is aligned (" polarizing "), and this molecular motion can generate a large amount of heat, it is seen that in the heating of micro-wave oven；Using intermediate frequency, thenJoule heating and dielectric heating exist simultaneously.When high frequency based on macropore, help to conduct heat, applied to heavy contaminationRegion, can quickly handle depth contaminated area, when low frequency, based on aperture, apply to region of reduced contamination, and helping remaining hasMachine pollutant slowly enters in heating tube, facilitates advanced treating, and intermediate frequency falls between.
Preferably, the big hole number of the high-frequency heating component and aperture ratio of number are (2-4): 1；The heating in medium frequencyThe big hole number and aperture ratio of number of component are (1-2): 1；The big hole number of the low frequency heating component and small hole number itThan for (0.5-1): 1, the high-frequency heating component is arranged using regular hexagon, and the heating in medium frequency component is using squareBe arranged, the low frequency heating component is arranged using equilateral triangle, the side length of the regular hexagon, it is described squareThe ratio between side length, side length of the equilateral triangle are 1:2:4.A high-frequency heating group is provided on each node of regular hexagonPart, the heating in medium frequency component are arranged using square, are provided with a heating in medium frequency component on each node of square,The low frequency heating component is arranged using equilateral triangle, and a low frequency heating group is provided on each node of equilateral trianglePart.The ratio between the side length of the regular hexagon, the side length of the square, side length of the equilateral triangle are 1:2:4, and arrangement is moreRationally.High-frequency heating component is applied to serious pollution area, and the heating amount is more, and big hole number compares just more, Ke YinengEnough heat, and so on, the big hole number of the heating in medium frequency component and the low frequency heating component tails off.
Preferably, the cylindrical portion inside the supporting sleeve is filled with heating filler, and the heating filler is by fillerFor diaphragm seals in the supporting sleeve inner space, the heating tube is fixed on the center of heating filler, and the heating filler isHeat filling, the heat filling are zinc oxide.Filler can not only play the role of supporting heating tube, so that the heat supply of systemUniformly, and heat can be conducted, promotes the organic pollutant evaporation for closing on soil.Zinc oxide is that a kind of thermal effect is relatively goodFiller.
Preferably, organic gas detection sensor is arranged in the triangular pyramids inside the supporting sleeve.Organic gas detectionSensor can be used to detect the content of organic gas, and judge soil treatment effect by the content.
Preferably, the gas gathering mask is made of rigid material, and the rigid material is polymethyl methacrylate, propyleneIt is a kind of in nitrile-butadiene-styrene copolymer or glass reinforced plastic.Rigid material has preferable supporting role, it can be ensured that takes outIt is not in loophole when gas, meanwhile, rigid material used herein is all that transparent, transparent material clearer can be seenSituation inside clear gas gathering mask, handles emergency situations in time.
Preferably, the outer pile body is porous ceramics shell, and the interior pile body is Alveolate activated carbon layer, the porous potteryThe ratio between the thickness of porcelain shell and the active carbon layer (1-2): 1.Porous ceramics and Alveolate activated carbon layer all have porous knotStructure can promote organic pollutant to penetrate into reaction stake and react.Hole ceramics bracket has certain rigidity, has veryMore anti-pressure abilities, can prevent soil extruding cause reaction stake deformation, Alveolate activated carbon layer can to organic pollutant intoRow preliminary treatment, meanwhile, preferable fitting can be formed with porous ceramics, one is SI material, and one is C-material, being capable of shapeAt the framework of more firm reaction stake, so that reaction stake is relatively stable.The thickness of the porous ceramics shell and the active carbonThe ratio between degree (1-2): 1.The amount of porous ceramics shell should be no less than the thickness of active carbon, not so be difficult to carry, and porous ceramics shellIf body is blocked up, gas osmotic effect is bad.
Preferably, the pile body of the outer pile body and the interior pile body is provided with perforative hole, the aperture face of described holeProduct accounts for the cylindrical sides surface area 10-20% of the outer pile body.Hole may make gas enter the reaction stake with it is describedFiller contact is permeated, the perforated area of described hole accounts for cylindrical sides the surface area 10-20%, Ke Yibao of the outer pile bodyDemonstrate,proving pollutant in the outer pile body and the air-locked situation of interior pile body can enter the inside of reaction stake.
Preferably, first divider wall and second divider wall are semi-transparent wall, and the third divider wall is impermeable wall.Multiple divider wall systems are capable of the further diffusion of effective block contaminant, and treatment by stages organic pollutant, are enabled toOrganic matter is fully isolated in contaminated area, and the first divider wall and second divider wall can allow the pollutant in soil to penetrate,And the third divider wall is impermeable wall, pollutant can be limited in Polluted area.
Preferably, the protrusion is prismatic or triangular pyramid type.The present invention is compounded with more set settings, handles soilWhen, the flowing of soil organic pollutant can be accelerated, and by the soil of organic gaseous contamination than more loose, very easy streamDynamic, therefore, the equipment being inserted into soil is very easy to occur deviating or loosen, and prismatic or triangular pyramidal can be pierced into soilIn, it is better protected from reaction stake offset.
The beneficial effects of the present invention are as follows:
(1) present invention concentrates in-situ heat component, gas phase extracting component and permeable reactive barrier in organic polluted soil regionCarry out joint disposal, prevent so that organic pollutant further migrates in the soil, effectively control pollution range, contaminated area withThe mode of organic matter makes organic matter volatilize in In Situ Heating soil, to greatly reduce content of organics in soil, in-situ heat component,Gas phase extracting component and permeable reactive barrier component can be cooperateed with and be played a role, and administer organic polluted soil to greatest extent；
(2) present invention uses electromagnetic heating, does not need heat transport fluid, heats more effectively to deeper soil, can not onlyThe processing of various contaminated soils is sufficiently coped with, heating efficiency is high, provided with three kinds of different heating components, and there are three types of being correspondingly arrangedHole, can be heated, high treating effect for different pollution conditions, and soil remediation ability is strong；
(3) the further diffusion of effective block contaminant is capable of in the reaction stake of multilayer divider wall system and special designing, andTreatment by stages organic pollutant reacts stake composite multi-layer filler, and each layer infiltration filler can cooperate, not only canContaminated area is sufficiently controlled, additionally it is possible to the organic pollutant to volatilize in efficient process heavy mental treatment soil；
(4) the present invention has rational design, and structure is simple, easy to maintain, also avoids secondary pollution, and application prospect is wide, Neng GouchangTime is in contaminated soil normal service.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
A kind of situ heat treatment, gas phase extracting and permeable reactive barrier joint renovation of organic pollution soil device, such as Fig. 1It is shown, including in-situ heat component 1, gas phase extracting component 2 and permeable reactive barrier component 3；
As shown in Figures 2 and 3, the in-situ heat component 1 includes that several electromagnetism pierced in contaminated soil region addHot component, the electromagnetic heating component include supporting sleeve 101 and the heating tube 102 that is set to inside supporting sleeve, the branchIt is located on contaminated soil surface 5 at the top of support set pipe 101 and forms soil layer opening, the heating tube 102 is on contaminated soil surface 5It is fixedly connected with gas collecting tube 104, the heating tube 102, which is provided with electric interfaces 105, can access external power supply, the supporting sleeve101 tops are cylindrical body, and lower part is triangular pyramids, pass through bottom plate 103 inside the supporting sleeve 101 for cylindrical body and pyrometric coneBody separates, several macropores 106 and several apertures 107, the macropore 106 are provided on the outer wall of the supporting sleeve 101Setting is arranged in the cylindrical portion, the aperture 107 in the cylindrical body and the triangular pyramids part, the macroporeIt is evenly arranged with 4 apertures 107 around 106, the circle center distance of the macropore 106 and the aperture 107 is hole diameter3 times, the ratio between aperture of the aperture of the macropore 106 and the aperture 107 is 1:(4-10)；
The gas phase extracting component 2 includes the gas gathering mask 6 in covering contaminated soil region 4, passes through wind inside the gas gathering mask 6Pipe 7 is connected to blower 8, and the blower 8 is connect with organic matter treating apparatus 9, the gas collecting tube 104 and gas of the in-situ heat component 1Body pipeline 10 connects, and the gas pipeline 10 is connect with vacuum pump 11, and the vacuum pump 11 connects with the organic matter treating apparatus 9It connects, air inlet 12 is arranged far from one end of blower in the gas gathering mask 6, and the air inlet 12 is provided with check valve, the check valveLimit the inside that gas flows to the gas gathering mask outside the gas gathering mask；
As shown in Figure 4 and Figure 5, the permeable reactive barrier component 3 includes being arranged along contaminated soil pollutant transport directionSeveral cylindrical bodies reaction stake and divider wall, the reaction stake include outer pile body 301, interior pile body 302, the outer pile bodyPile body surface is provided with protrusion 304, and the interior pile body is internally provided with infiltration filler, sets between the interior pile body and infiltration fillerIt is equipped with pile body diaphragm 303, the pile body surface of the outer pile body 301 and the interior pile body 302 is provided with perforative hole 305, instituteState infiltration filler to it is lower and on be provided with zeolite layer 306, apatite layer 307, zeroth order iron layer 308, lkd layer 309 and living soilLayer 310, the zeolite layer, the apatite layer, the zeroth order iron layer, the lkd layer and the living soil layer thickness itThan for (1-2): (2-3): (5-8): (1-2): (1-3)；The reaction stake is provided with along contaminated soil pollutant transport directionOne reaction stake layer 311, second reacts stake layer 312 and third and reacts stake layer 313, and the divider wall includes the first divider wall 314, theTwo divider walls 315, third divider wall 316, first divider wall 314 are set to the first reaction stake layer 311 and second insteadIt answers between stake layer 312, second divider wall 315 is set to the second reaction stake layer 312 and third reaction stake layer 313Between, the third divider wall 316 reacts the same cambered surface of stake layer 313 with third；
As shown in figure 5, the electromagnetic heating component includes that high-frequency heating component 111, heating in medium frequency component 112 and low frequency addHot component 113, the heating tube 102 of the high-frequency heating component 111 are provided with high frequency heating coil, the heating in medium frequency component112 heating tube 102 is provided with medium-frequency heating coil, and the heating tube 102 of the low frequency heating component 113 is provided with low frequency heatingCoil, the high-frequency heating component 111 are arranged using regular hexagon, the heating in medium frequency component 112 using square intoRow arrangement, the low frequency heating component 113 are arranged using equilateral triangle, the side length of the regular hexagon, the squareSide length, the ratio between the side length of the equilateral triangle be 1:2:4.The gas gathering mask 6 contaminated soil region 4 position between secondBetween divider wall 315 and third divider wall 316, the electromagnetic heating component is no less than 10m at a distance from the reaction stake.
As preferred embodiment, 106 quantity of macropore and 107 ratio of number of aperture of the high-frequency heating component 111 are(2-4): 1；106 quantity of macropore and 107 ratio of number of aperture of the heating in medium frequency component 112 are (1-2): 1；The low frequency adds106 quantity of macropore and 107 ratio of number of aperture of hot component 113 are (0.5-1): 1.
As preferred embodiment, the cylindrical portion inside the supporting sleeve 101 is filled with heating filler 108, instituteIt states heating filler 108 and 101 inner space of supporting sleeve is enclosed in by filler diaphragm 109, the heating tube 102, which is fixed on, to be addedThe center of hot filler 108, the heating filler 108 are heat filling, and the heat filling is zinc oxide, the supporting sleeveOrganic gas detection sensor 110 is arranged in triangular pyramids inside 101.
As preferred embodiment, the gas gathering mask 6 is made of rigid material, and the rigid material is polymethylacrylic acidIt is a kind of in methyl esters, acrylonitrile-butadiene-styrene copolymer or glass reinforced plastic.
As preferred embodiment, the outer pile body 301 is porous ceramics shell, and the interior pile body 302 is living for honeycombProperty layer of charcoal, the ratio between thickness of the porous ceramics shell and the active carbon layer (1-2): 1, described raised 314 for prismatic orThe pile body of triangular pyramidal, the outer pile body 301 and the interior pile body 302 is provided with perforative hole 305, described hole 305Perforated area accounts for the cylindrical sides surface area 10-20% of the outer pile body 301.As preferred embodiment, described firstDivider wall 314 and second divider wall 315 are semi-transparent wall, and the third divider wall is impermeable wall 316.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment partyFormula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to the one of inventionA little modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specificationSome specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.