CN204656288U - The condensation of wood-based plate manufacturing adds absorption type formaldehyde retracting device - Google Patents
The condensation of wood-based plate manufacturing adds absorption type formaldehyde retracting device Download PDFInfo
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- CN204656288U CN204656288U CN201520347022.5U CN201520347022U CN204656288U CN 204656288 U CN204656288 U CN 204656288U CN 201520347022 U CN201520347022 U CN 201520347022U CN 204656288 U CN204656288 U CN 204656288U
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Abstract
The utility model adds for condensation existing in wood-based plate manufacture process the problem that absorption type formaldehyde reclaimer efficiency is low, operating cost is high, propose the condensation of wood-based plate manufacturing and add absorption type formaldehyde retracting device, comprise refrigerating circuit, supercharging path, adsorption treatment path, enriched gas circulation line, fluid reservoir.The utility model enters refrigerating circuit again plate-fin evaporator after being compressed by semi-hermetic piston-type compressor by formaldehyde liquefies, and presses and enters adsorption treatment path again, and resolve at ambient pressure in then keeping; After resolving, the formaldehyde of enrichment returns semi-hermetic piston-type compressor air inlet circulation and stress, and organic efficiency significantly improves, and initial cost and the operating cost of retracting device also decline greatly.
Description
Technical field
The utility model relates to a kind of formaldehyde retracting device, is specifically related to the condensation of a kind of wood-based plate manufacturing and adds absorption type formaldehyde retracting device.
Background technology
Can urea aldehyde, phenolic aldehyde and melamine resin be used in a large number as adhesive in wood-based plate manufacture process, wherein applying is at most Lauxite, it is formed by urea and formaldehyde condensation polymer, manufacture and can overflow in a large number in gummed use procedure free formaldehyde, thus produce the organic exhaust gas discharges such as a large amount of formaldehyde.The formaldehyde administration way that past is commonly used mainly contains: catalytic oxidation, absorption, UF membrane, condensation etc.It is that normal pressure condensation adds absorption that the condensation in past adds absorption method, how to seem energy-conservation not because concentration of formaldehyde is lower, cause operating cost higher, and Vacuum Pressure Swing Adsorption fault rate is high.
How to overcome the high fault rate of Vacuum Pressure Swing Adsorption and desorption efficiency can be improved, becoming the problem of people's growing interest.
Summary of the invention
Utility model object: in order to overcome the deficiencies in the prior art, of the present utility modelly propose the condensation of wood-based plate manufacturing and add absorption type formaldehyde retracting device, the arrangement increases the Energy Efficiency Ratio of whole retracting device, overcome the high fault rate of Vacuum Pressure Swing Adsorption and desorption efficiency significantly improves.
Technical scheme: in order to solve the problems of the technologies described above, the utility model provides the condensation of wood-based plate manufacturing and adds absorption type formaldehyde retracting device, comprises refrigerating circuit, supercharging path, adsorption treatment path, enriched gas circulation line, fluid reservoir; Described refrigerating circuit comprises the semi-closed screw type refrigerating compressor, oil eliminator, water-cooled condenser, electric expansion valve, the plate-fin evaporator that sequentially connect, the outlet of electric expansion valve and the inlet communication of plate-fin evaporator coolant channel; The outlet of plate-fin evaporator coolant channel is communicated with semi-closed screw type refrigerating compressor;
Described supercharging path comprises semi-hermetic piston-type compressor, air accumulator, and the air inlet of described semi-hermetic piston-type compressor is communicated with exhaust gas entrance, and the gas outlet of semi-hermetic piston-type compressor is by the inlet communication of air accumulator and plate-fin evaporator formaldehyde passage;
Described adsorption treatment path comprises absorbing unit more than two, and described absorbing unit of often organizing comprises intake valve, resolves valve, adsorption tanks, air outlet valve; The outlet of described plate-fin evaporator formaldehyde passage is communicated with the air inlet bottom adsorption tanks by intake valve; The gas outlet at adsorption tanks top is communicated with clean gas floss hole by air outlet valve; Also be connected with the import of resolving valve between air inlet bottom the outlet of described intake valve and adsorption tanks, the outlet of resolving valve is communicated with the air inlet of semi-hermetic piston-type compressor by enriched gas circulation line, and enriched gas circulation line is provided with circulation pneumatic operated valve;
Fluid reservoir is connected with the formaldehyde passage liquid outlet bottom plate-fin evaporator, is provided with Liquid for maldehyde outlet bottom fluid reservoir.
As preferably, described supercharging path also comprises switch board, and described switch board is electrically connected with the temperature sensor on the pressure sensor on described air accumulator, described semi-hermetic piston-type compressor respectively; Described switch board is also electrically connected with semi-hermetic piston-type compressor by-passing valve.
As preferably, described by-passing valve is motor-driven pressure-difference by-passing valve.
As preferably, described adsorption treatment path comprise two groups be set up in parallel alternately for the absorbing unit adsorbed and resolve.
As preferably, described semi-hermetic piston-type compressor is oil-free lubrication formula semi-hermetic piston-type compressor.
As preferably, described semi-hermetic piston-type compressor adopts fire-proof motor and anti-explosion terminal box.
As preferably, described semi-hermetic piston-type compressor outside is provided with water-cooling apparatus.
As preferably, described water-cooling apparatus is the cooling water cover be looped around on semi-hermetic piston-type compressor outer wall.
As preferably, the adsorbent placed in described adsorption tanks inner chamber is column-shaped active carbon adsorbent.
Described wood-based plate manufacturing condensation adds the recovery method of absorption type formaldehyde retracting device, comprises the following steps:
1. pressurized treatment step: formaldehyde gas enters in semi-hermetic piston-type compressor by exhaust gas entrance, is compressed into through semi-hermetic piston-type compressor the formaldehyde gas that pressure is 0.7 ~ 0.8MPa;
2. cryogenic condensation step: the formaldehyde gas after supercharging passes in plate-fin evaporator through air accumulator, carry out heat exchange process with the cold-producing medium flowing through plate-fin evaporator simultaneously, through the circulating cooling of refrigerating circuit, the formaldehyde gas of 90% ~ 95% is cooled to liquid state, is reclaimed by the fluid reservoir be connected with the formaldehyde passage liquid outlet bottom plate-fin evaporator;
3. adsorption treatment step: be input in adsorption tanks by the formaldehyde gas after cryogenic condensation step process and carry out adsorption treatment, the gas after adsorption treatment is drained in air;
4. adsorb switch step: through the switching of valve, the formaldehyde gas after cryogenic condensation step process is adsorbed saturated adsorption tanks and switches to from passing into and pass into other adsorption tanks and carry out adsorption treatment;
5. resolve regeneration step, comprising:
Open and resolve valve and circulation pneumatic operated valve, 4. step is switched the adsorbent adsorbing saturated adsorption tanks got off and resolve at ambient pressure, will the formaldehyde gas desorption step out in adsorbent be adsorbed on; And when 4. these adsorption tanks are switched the adsorption tanks as current adsorption treatment by step again, enter next adsorption treatment step;
6. circulation and stress step: by step 5. in desorption formaldehyde gas out input to the air inlet of semi-hermetic piston-type compressor, enter next pressurized treatment step.
The utility model adds for condensation existing in wood-based plate manufacture process the problem that absorption type formaldehyde reclaimer efficiency is low, operating cost is high, proposes the condensation of wood-based plate manufacturing and add absorption type formaldehyde retracting device.Add on absorption type formaldehyde reclaimer in existing condensation and carry out upgrading, the plate-fin evaporator entering refrigerating circuit after formaldehyde is carried out middle pressure compression by semi-hermetic piston-type compressor again liquefies, then press in keeping and enter adsorption treatment path again, and resolve at ambient pressure; After resolving, the formaldehyde of enrichment returns semi-hermetic piston-type compressor air inlet circulation and stress.This device makes the ultimate evaporating temperature of refrigerating circuit significantly improve, refrigerating circuit structure also simplifies greatly, adsorption treatment path has abandoned the high vavuum pump analysis mode of fault rate and desorption efficiency raising about 30% simultaneously, enriched gas after normal pressure parsing gets back to the air inlet circulation and stress of semi-hermetic piston-type compressor, organic efficiency significantly improves, and initial cost and the operating cost of retracting device also decline greatly.Because the usual formaldehyde volatile quantity in formaldehyde handling place is little, formaldehyde atmospheric boiling point is-20 DEG C, should adopt semi-hermetic piston-type compressor.
Beneficial effect: 1, the wood-based plate manufacturing condensation that the utility model provides adds absorption type formaldehyde retracting device, little for formaldehyde handling place usual formaldehyde volatile quantity, formaldehyde atmospheric boiling point is-20 DEG C, therefore adopt semi-hermetic piston-type compressor PARA FORMALDEHYDE PRILLS(91,95) gas to compress, the gas of compression carries out condensation by plate-fin evaporator again, because middle pressure condensation, the effect reaching formaldehyde liquefaction can want low-down evaporating temperature as existing condensation adsorption formula formaldehyde reclaimer, thus simplify refrigerating circuit, improve the Energy Efficiency Ratio of refrigerating circuit and whole retracting device, condensed gas reenters adsorption treatment path and adsorbs, improve the pressure reduction of adsorption and desorption, desorption can be completed at ambient pressure, the effect reaching formaldehyde enrichment need not rely on vavuum pump as prior art, desorption efficiency improves about 30%, and the cost of semi-hermetic piston-type compressor and fault rate also decline to a great extent than vavuum pump, realize the object that formaldehyde reclaims better, enriched gas after simultaneously resolving is got back to semi-hermetic piston-type compressor air inlet and is carried out circular treatment, improves formaldehyde organic efficiency, reduces and directly discharges the pollution brought, 2, plate-fin evaporator is adopted to guarantee that cold-producing medium PARA FORMALDEHYDE PRILLS(91,95) gas carries out cooling and makes formaldehyde efficient liquefaction, 3, further, adopt 2 groups of absorbing units be set up in parallel, 2 groups of absorbing units, alternately for absorption and dissection process, improve efficiency, 4, further, in order to adapt to the explosive properties of formaldehyde gas, the motor of semi-hermetic piston-type compressor and terminal box are fire-proof motor and anti-explosion terminal box, 5, further, in order to prevent lubricating oil atomization after stain formaldehyde gas, semi-hermetic piston-type compressor adopts oil-free lubrication mode, 6, further, can not cause in order to ensure compression process and fire, semi-hermetic piston-type compressor outside is provided with heat radiation or cooling device, 7, further, switch board can regulate pressure at expulsion and regulate delivery temperature, sets safety precautions simultaneously, guarantees equipment safety, stably runs.
Accompanying drawing explanation
Fig. 1 is that wood-based plate manufacturing described in the utility model condensation adds absorption type formaldehyde retracting device structural representation.
Detailed description of the invention
Below by accompanying drawing, technical solutions of the utility model are described in detail, but protection domain of the present utility model is not limited to described embodiment.
Embodiment 1: as shown in Figure 1, wood-based plate manufacturing condensation described in the present embodiment adds absorption type formaldehyde retracting device, comprises semi-hermetic piston-type compressor 10, air accumulator 11, two groups of absorbing units, circulation pneumatic operated valve 8, refrigerating circuit, fluid reservoir 9, switch board 12; Refrigerating circuit is made up of semi-closed screw type refrigerating compressor 1, oil eliminator 2, water-cooled condenser 3, electric expansion valve 4 and plate-fin evaporator 5; First group of absorbing unit comprises adsorption tanks A 6, intake valve A 601, resolves valve A 602, air outlet valve A 603, the outlet of described plate-fin evaporator 5 formaldehyde passage is connected with the air inlet bottom adsorption tanks A 6 by intake valve A 601, the gas outlet at adsorption tanks A 6 top is connected with clean gas floss hole by air outlet valve A 603, is also connected with the import of resolving valve A 602 between the air inlet bottom the outlet of described intake valve A 601 and adsorption tanks A 6; Second group of absorbing unit comprises adsorption tanks B 7, intake valve B 701, resolves valve B 702, air outlet valve B 703, the outlet of described plate-fin evaporator 5 formaldehyde passage is connected with the air inlet bottom adsorption tanks B 7 by intake valve B 701, the gas outlet at adsorption tanks B 7 top is connected with clean gas floss hole by air outlet valve B 703, is also connected with the import of resolving valve B 702 between the air inlet bottom the outlet of described intake valve B 701 and adsorption tanks B 7.The outlet of described parsing valve A 602 is communicated with the air inlet of semi-hermetic piston-type compressor by the enriched gas circulation line being provided with circulation pneumatic operated valve 8 with the outlet of resolving valve B 702, exhaust gas entrance is also connected with the air inlet of semi-hermetic piston-type compressor 10, and the gas outlet of semi-hermetic piston-type compressor 10 is connected with the import of plate-fin evaporator 5 formaldehyde passage by air accumulator 11; Fluid reservoir is connected with the formaldehyde passage liquid outlet bottom plate-fin evaporator, is provided with Liquid for maldehyde outlet bottom fluid reservoir.Described plate-fin evaporator is preferably aluminum plate fin type evaporimeter.
Absorbing unit described in the utility model is not limited in two groups, can be 3 groups even more, wherein a part carry out adsorption treatment while, another part carries out dissection process.When absorbing unit is 3 groups, wherein two groups carry out adsorption treatment while, one group is carried out dissection process.
Embodiment 2: substantially identical with embodiment 1 structure, something in common is not repeated, difference is: described supercharging path also comprises switch board 12, and described switch board 12 is electrically connected with the pressure sensor 13 on described air accumulator 11, the temperature sensor 14 on described semi-hermetic piston-type compressor 10 respectively; Described switch board 12 is also electrically connected with semi-hermetic piston-type compressor 10 by-passing valve.
Embodiment 3: the recovery method of the condensation adsorption formula formaldehyde retracting device of described wood-based plate manufacturing, comprise the following steps: 1. pressurized treatment step: formaldehyde gas enters in semi-hermetic piston-type compressor by exhaust gas entrance, be compressed into through semi-hermetic piston-type compressor the formaldehyde gas that pressure is 0.7 ~ 0.8MPa;
2. cryogenic condensation step: the formaldehyde gas after supercharging passes in plate-fin evaporator through air accumulator, carry out heat exchange process with the cold-producing medium flowing through plate-fin evaporator simultaneously, through the circulating cooling of refrigerating circuit, the formaldehyde gas of 90% ~ 95% is cooled to liquid state, is reclaimed by the fluid reservoir be connected with the formaldehyde passage liquid outlet bottom plate-fin evaporator; Formaldehyde gas pressure after cryogenic condensation step process changes slightly;
3. adsorption treatment step: be input in adsorption tanks by the formaldehyde gas after cryogenic condensation step process and carry out adsorption treatment, the gas after adsorption treatment is drained in air;
4. adsorb switch step: through the switching of valve, the formaldehyde gas after cryogenic condensation step process is adsorbed saturated adsorption tanks and switches to from passing into and pass into other adsorption tanks and carry out adsorption treatment;
5. resolve regeneration step, comprising:
Open and resolve valve and circulation pneumatic operated valve, 4. step is switched the adsorbent adsorbing saturated adsorption tanks got off and resolve at ambient pressure, will the formaldehyde gas desorption step out in adsorbent be adsorbed on; And when 4. these adsorption tanks are switched the adsorption tanks as current adsorption treatment by step again, enter next adsorption treatment step;
6. circulation and stress step: by step 5. in desorption formaldehyde gas out input to the air inlet of semi-hermetic piston-type compressor, enter next pressurized treatment step.
If Fig. 1 is a 800m
3the wood-based plate manufacturing condensation of/h specification adds absorption type formaldehyde retracting device, collect the formaldehyde come and enter air accumulator 11 through the pipeline of pipeline through DN100 bore after pressure-raising to 0.8MPa pressure in semi-hermetic piston-type compressor 10 of DN250 bore, then the plate-fin evaporator 5(evaporator inlet-outlet entering refrigerating circuit is DN100), condense into liquid after being cooled to uniform temperature by low-temperature refrigerant, and concentrate on bottom plate-fin evaporator 5; Adsorption tanks A 6 is again entered from the outlet of plate-fin evaporator 5 formaldehyde passage a small amount of formaldehyde out and air mixture, by adsorbent in tank, after adsorption tanks A 6 adsorbent is saturated, close intake valve A 601, open intake valve B 701 to be switched to adsorption tanks B 7 and to adsorb, adsorption tanks A 6 then drops to normal pressure and carries out desorption; The enrichment formaldehyde parsed is communicated to the air inlet of semi-hermetic piston-type compressor by DN80 enriched gas circulation line, and the plate-fin evaporator entering refrigerating circuit together with device portal waste gas carries out circulating cooling; Enter by the pipeline of DN50 the object that fluid reservoir reaches recovery after Liquid for maldehyde bottom the plate-fin evaporator of refrigerating circuit confluxes.
Switch board 12 by the data acquisition control formaldehyde of the pressure sensor 13 on air accumulator 11 by the open degree of semi-hermetic piston-type compressor 10 by-passing valve to regulate pressure at expulsion; by PARA FORMALDEHYDE PRILLS(91,95) by the open degree of the data acquisition control by-passing valve of the temperature sensor 14 on semi-hermetic piston-type compressor 10 to regulate delivery temperature; set safety precautions simultaneously, guarantee security of system, stably run.The data feedback collected to the processor of PLC, then by assigning instruction by control loop to semi-hermetic piston-type compressor 10 after PLC computing.
Semi-hermetic piston-type compressor 10 is the explosion-proof semi-hermetic piston-type compressors (the formaldehyde semi-hermetic piston-type compressor that Bangbu LH Compressors Factory produces) that can adapt to formaldehyde, in order to adapt to the explosive properties of formaldehyde gas, semi-hermetic piston-type compressor adopts special fire-proof motor and anti-explosion terminal box; In order to prevent lubricating oil atomization after stain formaldehyde gas, semi-hermetic piston-type compressor adopts oil-free lubrication mode; Can not cause in order to ensure compression process and fire, semi-hermetic piston-type compressor 10 outside is provided with water-cooling apparatus; There is provided a series of safety precautions by switch board simultaneously.
Adsorption treatment path comprises two adsorption tanks and six valves, be respectively adsorption tanks A 6, adsorption tanks B 7, intake valve A 601, parsing valve A 602, air outlet valve A 603, intake valve B 701, resolve valve B 702, air outlet valve B 703, above-mentioned valve is pneumatic operated valve.The microporous activated carbon adsorbent of filling column (German Carbotech company C series active carbon) in two adsorption tanks, above-mentioned valve is that Tokyo frock Co., Ltd. is from control products.Six valves are alternately opened or have closed alternating sorbent or the analytical capabilities of two adsorption tanks.
Refrigerating circuit adopts the semi-closed screw type refrigerating compressor that can provide-35 DEG C of low temperature; The refrigeration oil adopting efficient oil eliminator cold-producing medium to be taken out of semi-closed screw type refrigerating compressor carries out being separated and sends semi-closed screw type refrigerating compressor oil pocket back to adapt to worst cold case; High-efficiency water cooling condenser is adopted to cool high-temperature high-pressure refrigerant; Adopt electric expansion valve to cold-producing medium throttling; Cold-producing medium PARA FORMALDEHYDE PRILLS(91,95) carries out cooling and makes formaldehyde efficient liquefaction to adopt special aluminum plate fin type evaporimeter to guarantee.
By PARA FORMALDEHYDE PRILLS(91,95) pressure-raising, and through the system of careful refinement, the evaporating temperature of refrigerating circuit is made to bring up to-35 DEG C by existing condensation-80 DEG C of adding absorption type formaldehyde reclaimer, the same effect that can reach formaldehyde liquefaction, thus simplify refrigerating circuit, improve the Energy Efficiency Ratio of refrigerating circuit and whole retracting device; Secondly because normal pressure desorption overcomes the high fault rate of Vacuum Pressure Swing Adsorption and desorption efficiency significantly improves; 3rd gets back to semi-hermetic piston-type compressor air inlet due to the enriched gas after parsing by enriched gas circulation line carries out circulating condensing, absorption, and thus formaldehyde organic efficiency improves greatly.
As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model not departing from claims definition, various change can be made in the form and details to it.
Claims (8)
1. the condensation of wood-based plate manufacturing adds absorption type formaldehyde retracting device, it is characterized in that: comprise refrigerating circuit, supercharging path, adsorption treatment path, enriched gas circulation line, fluid reservoir; Described refrigerating circuit comprises the semi-closed screw type refrigerating compressor, oil eliminator, water-cooled condenser, electric expansion valve, the plate-fin evaporator that sequentially connect, the outlet of electric expansion valve and the inlet communication of plate-fin evaporator coolant channel; The outlet of plate-fin evaporator coolant channel is communicated with semi-closed screw type refrigerating compressor;
Described supercharging path comprises semi-hermetic piston-type compressor, air accumulator, and the air inlet of described semi-hermetic piston-type compressor is communicated with exhaust gas entrance, and the gas outlet of semi-hermetic piston-type compressor is by the inlet communication of air accumulator and plate-fin evaporator formaldehyde passage;
Described adsorption treatment path comprises absorbing unit more than two, and described absorbing unit of often organizing comprises intake valve, resolves valve, adsorption tanks, air outlet valve; The outlet of described plate-fin evaporator formaldehyde passage is communicated with the air inlet bottom adsorption tanks by intake valve; The gas outlet at adsorption tanks top is communicated with clean gas floss hole by air outlet valve; Also be connected with the import of resolving valve between air inlet bottom the outlet of described intake valve and adsorption tanks, the outlet of resolving valve is communicated with the air inlet of semi-hermetic piston-type compressor by enriched gas circulation line, and enriched gas circulation line is provided with circulation pneumatic operated valve;
Formaldehyde passage liquid outlet bottom described plate-fin evaporator is connected with fluid reservoir, is provided with Liquid for maldehyde outlet bottom fluid reservoir.
2. wood-based plate manufacturing according to claim 1 condensation adds absorption type formaldehyde retracting device, it is characterized in that: described supercharging path also comprises switch board, described switch board is electrically connected with the temperature sensor on the pressure sensor on described air accumulator, described semi-hermetic piston-type compressor respectively; Described switch board is also electrically connected with semi-hermetic piston-type compressor by-passing valve.
3. wood-based plate manufacturing according to claim 2 condensation adds absorption type formaldehyde retracting device, it is characterized in that: described by-passing valve is motor-driven pressure-difference by-passing valve.
4. wood-based plate manufacturing according to claim 1 condensation adds absorption type formaldehyde retracting device, it is characterized in that: described adsorption treatment path comprise two groups be set up in parallel alternately for the absorbing unit adsorbed and resolve.
5. wood-based plate manufacturing according to claim 1 condensation adds absorption type formaldehyde retracting device, it is characterized in that: described semi-hermetic piston-type compressor is oil-free lubrication formula semi-hermetic piston-type compressor.
6. wood-based plate manufacturing according to claim 1 condensation adds absorption type formaldehyde retracting device, it is characterized in that: described semi-hermetic piston-type compressor adopts fire-proof motor and anti-explosion terminal box.
7. wood-based plate manufacturing according to claim 1 condensation adds absorption type formaldehyde retracting device, it is characterized in that: described semi-hermetic piston-type compressor outside is provided with water-cooling apparatus.
8. wood-based plate manufacturing according to claim 7 condensation adds absorption type formaldehyde retracting device, it is characterized in that: described water-cooling apparatus is the cooling water cover be looped around on semi-hermetic piston-type compressor outer wall.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759821A (en) * | 2019-11-23 | 2020-02-07 | 张家港市华昌新材料科技有限公司 | Neopentyl glycol production raw material recovery system and recovery method thereof |
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2015
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759821A (en) * | 2019-11-23 | 2020-02-07 | 张家港市华昌新材料科技有限公司 | Neopentyl glycol production raw material recovery system and recovery method thereof |
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