The program-controlled valve gear of nine tower pressure swing adsorption systemsTechnical field
The utility model relates to industrial gasses separating-purifying equipment technical field, specifically a kind of nine towers pressure swing adsorption systemProgram-controlled valve gear.
Background technique
With the high speed development of petrochemical industry and coal chemical industry, pressure-variable adsorption has become the primary hand of Large Scale Industrial Process hydrogen manufacturingSection.Pressure swing adsorption technique is complicated, high degree of automation, and the requirement to sequencing valve is high, and the working characteristics of sequencing valve directly influencesThe performance of product.
Periodic switching valve door is required during production by pressure swing adsorption, acts frequently and valve quantity is more, cutChanging the time also has strict demand, and manual operation valve cannot achieve, it is necessary to execute program using control system to adjust journeyIt controls valve and realizes technological operation.
It is ensuring equipment safety, long period since pressure-swing absorption apparatus processing medium is mostly the flammable explosive gas such as hydrogenReliable and stable operation just proposes some special requirements to the performance of program-controlled valve: sealing performance will be got well first, and the period is frequentControlled valve and keep valve do not leak outside also in leakage, to guarantee product quality and equipment safety；The speed of valve switch is fast,Because valve latus rectum is different, switch time can be different, but its switch time should be less than 3s, to guarantee execution and the product of control programThe quality of gas；Have two-way resistance to pressure and anti-high-speed flow performance of flushing；In addition, according to the technological requirements, program-controlled valve is not onlyRealize switching function also and to have that live valve position indicates, and to input, output signal is inconsistent alarms.
It is most in the pressure swing adsorption system of the prior art to use tens program-controlled valves, above-mentioned requirements are not only unable to reach,And take up a large area, cost of investment is high；And function is not complete enough, is not able to satisfy the needs of production by pressure swing adsorption.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of existing technologies, and provides a kind of nine tower pressure-variable adsorption systemsThe program-controlled valve gear of system.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution:
A kind of program-controlled valve gear of nine towers pressure swing adsorption system, including upper valve and lower valve, upper valve and lower valve are cylindrical bodyStructure.Upper valve includes upper valve body and upper valve core, and the inside of upper valve body is arranged in upper valve core, and upper valve core can turn relative to upper valve bodyIt is dynamic；Lower valve includes lower valve body and bottom spool, and the inside of lower valve body is arranged in bottom spool, and bottom spool can be rotated relative to lower valve body.Upper valve core is connected with bottom spool by shaft, and shaft is connected to motor across bottom spool, and the lower part of bottom spool is arranged in motor, electricityMachine drives upper valve core and bottom spool to rotate synchronously.
Nine upper interfaces are offered on upper valve body, offer nine lower interfaces in lower valve body, upper interface passes through pipeline respectivelyIt is connect with the tower top of adsorption tower, lower interface passes through pipeline respectively and the tower bottom of adsorption tower connects.
It is respectively equipped with product gas channel, one down channel, two down channel, three inside upper valve core and drops channel, most final risePressure passageway and upper valve countercurrent purge channel；It is logical that raw material air inlet, sorption channel, lower valve countercurrent purge are respectively equipped with inside bottom spoolRoad and evacuation passageway.By connection by metal hose, countercurrent purge is logical for upper valve countercurrent purge channel and lower valve countercurrent purge channelAdsorption tower bottom is connect by road with another absorption tower top, to complete countercurrent purge process.Evacuation passageway is controlled to a vacuum pump, anotherEnd connects each adsorption tower bottom, to be regenerated completely to each adsorption tower.
Nine tower pressure swing adsorption systems include nine adsorption towers, and each moment is in adsorbed state there are two adsorption tower, oftenA tower is pressed three times, only with a sequencing valve in nine tower pressure swing adsorption systems.
The raw material air inlet is connected to sorption channel, is connected by the lower interface of sorption channel and lower valve body, to guarantee originalExpect that gas can constantly enter from absorption tower bottom.
The product gas channel and sorption channel are arranged on same vertical line, rotate synchronously, to guarantee each adsorption towerIt is carried out into raw material is synchronous with product out.
The one down channel will be separated by the upper orifice of two adsorption towers, realize that the adsorption tower of two positions in interval is equalPressure.
The two down channel will be separated by the upper orifice of three adsorption towers, realize that the adsorption tower of three positions in interval is equalPressure.
Described three drop the upper orifice that channel will be separated by four adsorption towers, realize that the adsorption tower of four positions in interval is equalPressure.
The final boosting channel connects the tower top interface of product gas channel and adsorption tower, final after rising to completeBoosting is prepared for next adsorption cycle.
The output shaft of the motor is connect by shaft coupling with shaft, to guarantee that power transmission is stablized.
The utility model beneficial effect achieved is:
The utility model replaces tens sequencing valves in traditional pressure-swing absorption apparatus with a rotatable sequencing valve, greatlyIt is big to reduce valve quantity, it can reduce investment outlay and occupied area；
And the rotation period of the sequencing valve can be controlled completely by the revolving speed of driving motor, can freely adjust absorption weekPhase reduces the dosage of adsorbent so as to improve adsorption efficiency.Therefore, the utility model has good economic technology,It is structurally reasonable.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with thisNovel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the utility model structure diagram；
Fig. 2 is the structural schematic diagram of upper valve；
Fig. 3 is the structural schematic diagram of lower valve.
In figure: 1, upper valve body；2, upper valve core；3, upper interface；4, shaft；5, lower valve body；6, bottom spool；7, lower interface；8,Shaft coupling；9, motor；10, output shaft；11, lower valve countercurrent purge channel is logical；12, metal hose；13, upper valve countercurrent purge is logicalRoad；14, three drop channel；15, two down channel；16, one down channel；17, it finally boosts channel；18, product gas channel；19, evacuation passageway；20, raw material air inlet；21, sorption channel.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellentIt selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment:
As shown in Figure 1, Figure 2 and Figure 3, wherein what " one, two, three ... nine " in Fig. 2, Fig. 3 indicated respectively is upper interface3 and lower interface 7 where position, convenient for description.
A kind of program-controlled valve gear of nine towers pressure swing adsorption system, including upper valve and lower valve, upper valve and lower valve are cylindrical bodyStructure.Upper valve includes upper valve body 1 and upper valve core 2, and the inside of upper valve body 1 is arranged in upper valve core 2, and upper valve core 2 can be relative to upper valveBody 1 rotates；Lower valve includes lower valve body 5 and bottom spool 6, and the inside of lower valve body 5 is arranged in bottom spool 6, and bottom spool 6 can be relative underValve body 5 rotates.Upper valve core 2 and bottom spool 6 are connected by shaft 4, and shaft 4 passes through bottom spool 6 and connect with motor 9, motor it is defeatedShaft 10 is connect by shaft coupling 8 with shaft 4, and the lower part of bottom spool 6 is arranged in motor 9, and motor 9 drives upper valve core 2 and lower valveCore 6 rotates synchronously.
Nine upper interfaces 3 are offered on upper valve body 1, offer nine lower interfaces 7 in lower valve body 5, upper interface 3 passes through respectivelyThe connection of the tower top of pipeline and adsorption tower, each upper interface 3 corresponds to an adsorption tower；Lower interface 7 passes through pipeline and adsorption tower respectivelyTower bottom connection, the corresponding adsorption tower of each lower interface 7.
It is respectively equipped with product gas channel 18, one down channel 16, two down channel 15, three inside upper valve core 2 and drops channel14, final boosting channel 17 and upper valve countercurrent purge channel 13:
The product gas channel 18 is used to product；
The one down channel 16 will be separated by the upper orifice of two adsorption towers, realize the adsorption tower of two positions in intervalPress；
The two down channel 15 will be separated by the upper orifice of three adsorption towers, realize the absorption of three positions in intervalTower is pressed；
Described three drop the upper orifice that channel 14 will be separated by four adsorption towers, realize the absorption of four positions in intervalTower is pressed；
The final boosting channel 17 connects the tower top interface of product gas channel and adsorption tower, to complete after rising mostFinal rise pressure is prepared for next adsorption cycle.
It is respectively equipped with raw material air inlet 20, sorption channel 21, lower valve countercurrent purge channel 11 inside bottom spool 6 and vacuumizesChannel 19:
The raw material air inlet 20 is connected to sorption channel 21, is connect by sorption channel 21 with the lower interface 7 of lower valve body 5,To guarantee that unstripped gas can constantly enter from absorption tower bottom, the product gas channel 18 is arranged with sorption channel 21 same perpendicularIt on straight line, rotates synchronously, to guarantee that each adsorption tower is carried out into raw material is synchronous with product out.
Upper valve countercurrent purge channel 13 is connect with lower valve countercurrent purge channel 11 by metal hose 12, countercurrent purge channelAdsorption tower bottom is connect with another absorption tower top, to complete countercurrent purge process；
Evacuation passageway 19 is controlled to a vacuum pump, and the other end connects each adsorption tower bottom, to carry out completely again to each adsorption towerIt is raw.
The specific work process of nine tower pressure swing adsorption systems, for example, by taking a tower as an example:
When sorption channel goes to a tower channel position, tower absorption stops absorption after leaving；
Start one down and gas in tower is discharged into four towers that just completion two rises；
Gas in tower is discharged into five towers for just completing uniform liter followed by two down；
Followed by three equal general who has surrendered Ta Nei gas be discharged into and just complete regenerated six tower；
Residual gas in one tower is discharged into eight towers for just completing countercurrent purge by bottom followed by countercurrent purge；
Be again internal air-blowing sweep by residual gas in three towers by bottom be discharged into just complete countercurrent purge a tower in；
Subsequently into vacuumizing regenerative process；
After regeneration, start to boost, three rise before this, gas is discharged into a tower by top in five towers；
It is risen followed by two, gas is discharged into a tower by top in six towers；
Followed by one rises, gas is discharged into a tower by top in seven towers；
Product gas boosting finally is carried out to a tower by product pipe network, completes an adsorption cycle.