A kind of drying machineTechnical field
The utility model relates to drying equipment, relates in particular to a kind of drying machine for dried particles shape material.
Background technology
Dry technology is must be with common in a lot of fields.Such as, timber being dried before making wooden model, woodenware can prevent product deformation, and ceramic batch being dried before calcining can prevent finished product be full of cracks.In addition, dried material is also convenient to transportation and is stored, such as the grain drying of results is arrived below certain moisture content, in case go mouldy.Due to the natural drying needs that far can not meet production development, various drying devices obtain development and application more and more widely thus.A kind of plant equipment for reducing material moisture of drying machine relate generally to, is mainly used in material to carry out drying process.The kind of drying machine can comprise vacuum drier, spray dryer, freeze drier, pneumatic drier, microwave dryer, fluid bed dryer, roller drier etc.Wherein, various drying machines are all to have utilized identical physics drying principles substantially, i.e. the drying process of wet stock has 2 basic processes to carry out simultaneously: a. heat to wet stock, raises its temperature by gas transfer; B. the moisture of material inside diffuses to the surface, and vaporization is taken away by air-flow on surface.
Band drier is conventional continuous chain-belt drying equipment, can be widely used in the industries such as chemical industry, food, medicine, building materials, electronics, is particularly suitable for the dry of the good sheet of gas permeability, strip, granular material., the dry machine of sandwich tape is usually used in that rate of drying requirement is lower, drying time is longer, and in whole dry run, process condition can keep constant occasion.Interlayer arranges dividing plate to organize the directed flow of drying medium, makes dry materials even.Multi-layer belt type drying machine takes up an area few, simple in structure, is widely used in dried grain class material.
But it is thermal source that existing band drier generally be take electric heater or gas combustion heater, thermal source heating extraneous air by these electric heaters or gas combustion heater makes it to become after high temperature air, contact with material to be dried, take away material surface moisture and make it dry.Then, to outside, discharge the gas with moisture.This gas being discharged from is the high-temperature gas also with certain heat, is directly discharged in air, not only causes the indoor temperature and humidity that drying machine is set to rise, and indoor environment worsens, and has also caused the waste of the energy.
Summary of the invention
For overcoming shortcomings and deficiencies of the prior art, the utility model proposes a kind of drier unit that can reduce environmental pollution and reduce energy consumption.
The utility model provides a kind of drying machine, comprising: casing, is provided with charging aperture, discharging opening, air inlet and air outlet on it; Material conveyor belt, is arranged in described casing, for receiving material to be dried and dried material being delivered to the discharging opening of casing; Heater, is positioned at described material conveyor belt below; Fan unit, is communicated with described casing, for generation of air-flow with through material be dried processing; And dehumidifying heater, be positioned at outside described casing, be communicated with air inlet and the air outlet of described casing.
Alternatively, according to drying machine of the present utility model, described material conveyor belt is at least one.
Alternatively, according to drying machine of the present utility model, described material conveyor belt is two, minute upper and lower two-layer setting, and the traffic direction of described two-layer material conveyor belt is contrary.
Alternatively, according to drying machine of the present utility model, at the afterbody of described drying machine, described lower floor material driving-belt stretches out a segment length than upper strata conveyer belt, so that the material of upper materials conveyer belt can all fall to lower floor's material conveyor belt.
Alternatively, according to drying machine of the present utility model, described casing comprises at least one independently box unit.
Alternatively, drying machine described in the utility model, described heater is steam heater or electric boiling plate.
Alternatively, according to drying machine of the present utility model, in described casing, be provided with homogenating plate, for the air-flow that fan unit is produced, carry out uniform distribution.
Alternatively, according to drying machine of the present utility model, in described casing, be also provided with heated air circulation device.
Alternatively, according to drying machine of the present utility model, described drying machine also comprises distribution device, for material to be dried is evenly written into the material conveyor belt in described casing.
Alternatively, according to drying machine of the present utility model, described distribution device comprises and waves cloth mouth, and it is driven by wheel shaft.
Drying machine described in the utility model can make the evaporation of the moisture in material in drying machine fast and efficiently, and have in the casing arranged outside of described drying machine the dehumidifying heater that is communicated with described casing air inlet and air outlet, after dry hot blast contacts with moist material, with the moist hot blast of steam by air outlet in pipeline flows back to dehumidifying heater, after dehumidifying heating, again enter casing, recycle, the heat that makes to flow out the moist hot blast of casing is fully utilized, and has reduced the energy consumption of drying machine.
Accompanying drawing explanation
By reading below detailed description of the preferred embodiment, various other advantage and benefits will become cheer and bright for those of ordinary skills.Accompanying drawing is only for the object of preferred embodiment is shown, and do not think restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of drying machine described in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the utility model will be further described.
Fig. 1 illustrates the structural representation of drying machine described in the utility model.As shown in Figure 1, according to drying machine of the present utility model, can be used for the materials such as drying grain, granule state food.Particularly, drying machine of the present utility model comprises: casing 100, material conveyor belt 200, fan unit 400 and dehumidifying heater 500, on described casing 100, be provided with charging aperture 101, discharging opening 102 for material turnover, and air inlet 103 and air outlet 104; Material conveyor belt 200 is arranged in described casing 100, for receiving material to be dried and dried material being delivered to the discharging opening of casing, is provided with heater 300 below described material conveyor belt, for the air-flow that fan unit is produced, heats; Described fan unit 400 is communicated with described casing 100, for generation of air-flow, this air-flow is become dry hot blast through material by heater heating, material is dried to processing, preferably, fan unit 400 is positioned at the both sides on the top of casing 100, and symmetrical, with guarantee that air-flow in casing distributes evenly; Described dehumidifying heater 500 is positioned at outside described casing, is communicated with the air inlet 103 and air outlet 104 of described casing.
In existing drying machine, after dry thermal current contacts with described wet stock, take away the moisture of material by dry materials, and the moist air stream of absorption moisture is discharged casing through air outlet.In fact, the air-flow of described humidity still, with the heat of some, is directly discharged in air, and heat loses in vain, has caused the wasting of resources.In the utility model, the air outlet that the two ends of described dehumidifying heater are respectively drying machine casing is connected with air inlet, absorb the moist air stream of moisture after air outlet is discharged casing, enter in described dehumidifying heater through dehumidifying heating, form hot blast and again enter casing, realized and having recycled, the heat that makes to flow out the moist hot blast of casing is fully utilized, reduce the energy consumption of drying machine, also reduced the environmental pollution that moist exhaust of hot air is brought simultaneously.
Except air inlet as shown in Figure 1, drying machine described in the utility model is also provided with other a plurality of air inlets in the side of casing, further to improve drying efficiency.
In drying machine described in the utility model, described material conveyor belt is at least one, is provided with densely covered hole on conveyer belt, and granularity is less than the granularity of material, but can allow gas to pass.In an embodiment of the present utility model, described material conveyor belt is two, minute upper and lower two-layer setting, as shown in fig. 1.Described conveyer belt is connected with so that the drive unit of its operation, and wherein, the traffic direction of upper and lower two-layer conveyer belt is contrary, and upper materials conveyer belt is carried out to head by afterbody to the afterbody ，Er lower floor conveyer belt of advancing by the head of drying machine.In the utility model, the initiating terminal of upper materials conveyer belt is connected with the charging aperture of casing, and the initiating terminal of lower floor's material conveyor belt is connected with the discharging opening of casing.Material to be dried is fallen on upper materials conveyer belt initiating terminal through casing charging aperture, head by drying machine is advanced to afterbody, the material that arrives upper materials conveyer belt afterbody is fallen the end of lower floor's material conveyor belt, material is advanced to head by the afterbody of drying machine again, until arrive casing discharging opening.Material is dried in the process transmitting, and finally by casing discharging opening, derives drying machine.Preferably, at the afterbody of described drying machine, described lower floor material driving-belt stretches out a segment length than upper strata conveyer belt, so that the material of upper materials conveyer belt can all fall to lower floor's material conveyor belt.
In drying machine described in the utility model, described casing comprises at least one independently box unit 105.As shown in fig. 1, in described casing, be provided with the independent case body unit 105 of a plurality of mutual serial connections, in each box unit, be also respectively arranged with the material conveyor belt of charging aperture, discharging opening and upper and lower two-layer distribution, a plurality of box unit are connected in series the continuous operation that can realize material.
In an embodiment of drying machine described in the utility model, the heater that is positioned at described material conveyor belt below is steam heater.Steam heater is to adopt high-temperature vapor to heat a kind of heat exchanger of cryogenic gas.In the utility model, described steam heater is the fin being connected with steam boiler, steam boiler provides high-temperature steam by steam line to each fin, before jet chimney enters fin, can be provided with for example drain valve of certain water removing structure, so that water cooling by steam and that condense, be removed to avoid affecting the effect of heat sink arrangement.
In another embodiment of drying machine described in the utility model, the heater that is positioned at described material conveyor belt below is electric boiling plate.Electric hot plate is to make exothermic material with lectrothermal alloy wire, with mica soft board, makes insulating materials, the equipment that outsourcing is heated with metal sheet (aluminium sheet, corrosion resistant plate etc.).Common electric boiling plate has stainless steel electric boiling plate (mica electric heating plate), ceramic electric heating plate, cast aluminium electric boiling plate and cast copper electric boiling plate, can need to select according to using.
Drying machine of the present utility model, is provided with homogenating plate (not shown) in described casing, for the air-flow that fan unit is produced, carry out uniform distribution.Described homogenating plate is arranged at respectively bottom and the top of described lower floor material conveyor belt, for air-flow is carried out to uniform distribution, improves drying efficiency.Described homogenating plate is stainless steel orifice plate, and its thickness is not more than 2mm, preferably 0.5-2mm; Percent opening designs according to air circulation, and wind speed is controlled at 6-9m/s.
In drying machine described in the utility model, in described casing, be also provided with heated air circulation device 600, for making hot blast form circulation in casing, to improve the drying efficiency of material.
Drying machine described in the utility model also comprises distribution device 700, for material to be dried is evenly written into the material conveying device in described casing.Described cloth system comprises a feeding auger and swingable cloth mouth, and it is directly poured wet material on the conveyer belt on upper strata into.Wherein, described cloth mouth is connected with the wheel shaft of an off-axis, makes the described cloth mouth can be without swinging back and forth in the stroke range of setting of pausing.The speed swinging is controlled by the motor of cloth system, and motor is connected with distribution system, by distribution system, is controlled.
According to the utility model, the motor of described each fan unit is connected with distribution system, can be regulated and controled by distribution box power and the rotating speed of the motor of fan unit, so as to the air velocity in adjustment casing and gas flow temperature etc.In addition, the motor of distribution device and material conveyor belt drive system is also connected with distribution system, can adjust power and the speed of motor.The motor of described material conveyor belt drive system is positioned at the front and rear of drying machine casing, can comprise two motors, and is adjustable motor.
It should be noted, above-described embodiment describes the utility model rather than the utility model is limited, and those skilled in the art can design alternative embodiment in the situation that do not depart from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and is not listed as element or step in the claims.The use of word first, second and C grade does not represent any order, can be title by these word explanations.