CN216448663U - Water vapor recycling device for formaldehyde production - Google Patents
Water vapor recycling device for formaldehyde production Download PDFInfo
- Publication number
- CN216448663U CN216448663U CN202122968784.5U CN202122968784U CN216448663U CN 216448663 U CN216448663 U CN 216448663U CN 202122968784 U CN202122968784 U CN 202122968784U CN 216448663 U CN216448663 U CN 216448663U
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- Prior art keywords
- pipe
- heat
- water vapor
- box
- recycling device
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000004064 recycling Methods 0.000 title claims abstract description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 29
- 229910052802 copper Inorganic materials 0.000 claims description 29
- 239000010949 copper Substances 0.000 claims description 29
- 229910021591 Copper(I) chloride Inorganic materials 0.000 claims description 25
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 claims description 25
- 229940045803 cuprous chloride Drugs 0.000 claims description 25
- 230000017525 heat dissipation Effects 0.000 claims description 21
- 238000000605 extraction Methods 0.000 claims description 7
- 239000011490 mineral wool Substances 0.000 claims description 7
- 239000008234 soft water Substances 0.000 abstract description 14
- 238000004321 preservation Methods 0.000 abstract description 9
- 238000000746 purification Methods 0.000 abstract description 6
- 239000000243 solution Substances 0.000 description 20
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000013064 chemical raw material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The utility model discloses a water vapor recycling device for formaldehyde production, which comprises a heat collection box, wherein a soft water box is fixedly arranged on the outer surface of the upper end of the heat collection box, a heat preservation shell is arranged on the outer wall of the soft water box, an energy utilization assembly is arranged inside the heat collection box, a carbon monoxide purification box is fixedly arranged on the outer surface of the right side of the heat collection box, support rods are fixedly arranged at four corners of the outer surface of the lower end of the heat collection box, self-locking universal wheels are fixedly arranged on the outer surface of the lower end of each support rod, a pressure release valve is fixedly arranged on the upper portion of the outer surface of one side of the heat preservation shell, and a water outlet valve is fixedly arranged on the lower portion of the outer surface of one side of the soft water box. The water vapor recycling device for formaldehyde production is provided with the energy utilization assembly, so that heat in the water vapor can be recycled, heating time during soft water use can be shortened, efficiency is improved, cost is saved, and carbon monoxide can be removed conveniently by the aid of the carbon monoxide purification box.
Description
Technical Field
The utility model relates to the technical field of chemical production, in particular to a water vapor recycling device for formaldehyde production.
Background
The industrial formaldehyde is an aqueous solution containing 37-55 wt% of formaldehyde, is an important basic chemical raw material product produced by using methanol as a raw material, is an important bulk chemical product in world basic organic chemical raw materials, is used as an organic chemical raw material, is mainly used for producing thermosetting resin, and organic chemical products such as butanediol, MDI (toluene diisocyanate) and polyformaldehyde, and is widely used in the industries such as chemical industry, medicine, textile, wood processing and the like.
In the prior art, a Chinese patent document with an authorization publication number of CN202023229564.2 describes a water vapor recycling device for formaldehyde production, the patent is favorable for heating water liquid through the arrangement of the water suction pump, the installation pipe, the heating box, the water storage tank and the water suction pipe, and is favorable for utilizing steam through the arrangement of the branch pipe, the valve, the supporting pipe, the placing plate, the barrier plate and the hanging ring, however, in the prior art, the methanol oxidation reaction tail gas is often used as fuel, soft water is combusted and heated to form water vapor, the tail gas emission is reduced, the generated water vapor cannot be reasonably utilized, and the methanol oxidation reaction tail gas is used as fuel to carry out oxidation reaction, possibly, insufficient oxygen exists, carbon monoxide is generated, certain adverse effect is brought to the using process of people, and therefore the water vapor recycling device for formaldehyde production is provided.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Aiming at the defects of the prior art, the utility model provides the water vapor recycling device for formaldehyde production, which has the advantages of facilitating energy recycling of water vapor formed by burning and heating soft water by taking methanol oxidation reaction tail gas as fuel, facilitating removal of carbon monoxide and the like, and can effectively solve the problems in the background art.
(II) technical scheme
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a steam cyclic utilization device of formaldehyde production, includes the thermal-arrest case, the upper end external surface fixed mounting of thermal-arrest case has the softened water tank, the outer wall of softened water tank is provided with the lagging casing, the inside of thermal-arrest case is provided with the energy utilization subassembly, the right side external surface fixed mounting of thermal-arrest case has the carbon monoxide purifying box, the four corners fixed mounting of thermal-arrest case lower extreme surface has the bracing piece, the lower extreme external surface fixed mounting of bracing piece has the auto-lock universal wheel, the upper portion fixed mounting of lagging casing one side surface has the relief valve, the lower part fixed mounting of softened water tank one side surface has the outlet valve, just form the heating chamber between the outer wall of softened water tank and the inner wall of lagging casing.
Preferably, the mineral wool board is fixedly arranged in the heat preservation shell.
Preferably, the energy utilization subassembly includes heat extraction pipe, intake pipe, air-blower, first blast pipe, mounting bracket, pure copper pipe, heat dissipation chamber and second blast pipe, just the inside of thermal-arrest case is seted up in the heat dissipation chamber, mounting bracket fixed mounting is in the left and right sides in heat dissipation chamber, pure copper pipe fixed mounting is in the upper end surface of mounting bracket, just the heat dissipation chamber is installed in the upper end surface of thermal-arrest case, just the one end of heat extraction pipe is stretched into in the heating chamber, and the other end of heat extraction pipe stretches into the upper portion in heat dissipation chamber.
Preferably, the air blower is fixedly installed on the outer surface of the left side of the heat collection box, the air inlet pipe is fixedly installed on the outer surface of one end of the air blower, the first exhaust pipe is fixedly installed on the outer surface of the lower end of the air blower, one end of the first exhaust pipe is fixedly connected with one end of the pure copper pipe, and the second exhaust pipe is fixedly installed on the outer surface of the other end of the pure copper pipe.
Preferably, the surface of the pure copper pipe is fixedly provided with a radiating fin.
Preferably, the carbon monoxide purifying box includes cuprous chloride solution tank, drain pipe, drain valve, exhaust hole and mounting hole, just cuprous chloride solution tank fixed mounting is in the right-hand member surface of thermal-arrest case, the right side of cuprous chloride solution tank upper end surface is seted up in the exhaust hole, the left side of cuprous chloride solution tank upper end surface is seted up in the mounting hole, drain pipe fixed mounting is in the lower part of cuprous chloride solution tank one side surface, drain valve fixed mounting is in the one end surface of drain pipe.
(III) advantageous effects
Compared with the prior art, the utility model provides a water vapor recycling device for formaldehyde production, which has the following beneficial effects:
1. this water vapor cyclic utilization device of formaldehyde production, the energy utilization subassembly of setting, intake pipe through setting up, with the leading-in pure copper pipe of hotter water vapor, because of the heat conductivity of pure copper pipe is strong, and the outer wall of pure copper pipe is provided with radiating fin, be convenient for transmit the heat of the inside water vapor of pure copper pipe and retrieve, make the temperature of heat dissipation intracavity portion rise, the pressure of heat dissipation intracavity portion increases, steam transmits the inside in heating chamber through the heat extraction pipe, be convenient for heat the softened water tank, make the inside water of softened water tank be heated, the time of heating when being convenient for reduce and use the softened water, and the efficiency is increased, and the cost is saved.
2. This water vapor cyclic utilization device of formaldehyde production, the mineral wool board that sets up at the heat preservation shell is convenient for increase thermal insulation performance, and the carbon monoxide purifying box that sets up contains carbon monoxide in water vapor, passes through the cuprous chloride solution of cuprous chloride solution incasement portion with gas through the second blast pipe, absorbs carbon monoxide, increases factor of safety.
Drawings
FIG. 1 is a schematic view of the overall structure of a water vapor recycling device for formaldehyde production according to the present invention.
FIG. 2 is a schematic structural diagram of an energy utilization assembly in the water vapor recycling device for formaldehyde production according to the present invention.
FIG. 3 is a schematic structural diagram of a carbon monoxide purification box in the water vapor recycling device for formaldehyde production according to the present invention.
FIG. 4 is a schematic structural view of a mineral wool board in the water vapor recycling device for formaldehyde production according to the present invention.
In the figure: 1. a heat collection tank; 2. a soft water tank; 3. an energy utilization assembly; 4. a heat-insulating shell; 5. a water outlet valve; 6. a carbon monoxide purification tank; 7. a self-locking universal wheel; 8. a support bar; 9. a pressure relief valve; 10. a heating cavity; 11. a heat exhaust pipe; 12. an air inlet pipe; 13. a blower; 14. a first exhaust pipe; 15. a mounting frame; 16. a pure copper tube; 17. a heat dissipation cavity; 18. a second exhaust pipe; 19. a cuprous chloride solution tank; 20. a drain pipe; 21. a drain valve; 22. an exhaust hole; 23. mounting holes; 24. mineral wool board.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.
Detailed description of the preferred embodiment
The embodiment is a water vapor recycling device for formaldehyde production.
As shown in fig. 1 to 4, the solar water heater comprises a heat collection box 1, a soft water box 2 is fixedly mounted on the outer surface of the upper end of the heat collection box 1, a heat preservation shell 4 is arranged on the outer wall of the soft water box 2, an energy utilization assembly 3 is arranged inside the heat collection box 1, a carbon monoxide purification box 6 is fixedly mounted on the outer surface of the right side of the heat collection box 1, support rods 8 are fixedly mounted at four corners of the outer surface of the lower end of the heat collection box 1, a self-locking universal wheel 7 is fixedly mounted on the outer surface of the lower end of each support rod 8, a pressure release valve 9 is fixedly mounted on the upper portion of the outer surface of one side of the heat preservation shell 4, a water outlet valve 5 is fixedly mounted on the lower portion of the outer surface of one side of the soft water box 2, and a heating cavity 10 is formed between the outer wall of the soft water box 2 and the inner wall of the heat preservation shell 4.
The mineral wool board 24 is fixedly arranged in the heat preservation shell 4; the energy utilization assembly 3 comprises a heat exhaust pipe 11, an air inlet pipe 12, an air blower 13, a first exhaust pipe 14, a mounting frame 15, a pure copper pipe 16, a heat dissipation cavity 17 and a second exhaust pipe 18, wherein the heat dissipation cavity 17 is arranged inside the heat collection box 1, the mounting frame 15 is fixedly arranged on the left side and the right side of the heat dissipation cavity 17, the pure copper pipe 16 is fixedly arranged on the outer surface of the upper end of the mounting frame 15, the heat dissipation cavity 17 is arranged on the outer surface of the upper end of the heat collection box 1, one end of the heat exhaust pipe 11 extends into the heating cavity 10, and the other end of the heat exhaust pipe 11 extends into the upper part of the heat dissipation cavity 17; the blower 13 is fixedly installed on the outer surface of the left side of the heat collecting tank 1, the air inlet pipe 12 is fixedly installed on the outer surface of one end of the blower 13, the first exhaust pipe 14 is fixedly installed on the outer surface of the lower end of the blower 13, one end of the first exhaust pipe 14 is fixedly connected with one end of a pure copper pipe 16, and the second exhaust pipe 18 is fixedly installed on the outer surface of the other end of the pure copper pipe 16; the surface of the pure copper pipe 16 is fixedly provided with a radiating fin; the carbon monoxide purifying box 6 comprises a cuprous chloride solution box 19, a drain pipe 20, a drain valve 21, an exhaust hole 22 and a mounting hole 23, the cuprous chloride solution box 19 is fixedly mounted on the outer surface of the right end of the heat collecting box 1, the exhaust hole 22 is formed in the right side of the outer surface of the upper end of the cuprous chloride solution box 19, the mounting hole 23 is formed in the left side of the outer surface of the upper end of the cuprous chloride solution box 19, the drain pipe 20 is fixedly mounted on the lower portion of the outer surface of one side of the cuprous chloride solution box 19, and the drain valve 21 is fixedly mounted on the outer surface of one end of the drain pipe 20.
The utility model is a water vapor recycling device for formaldehyde production, the energy utilization assembly 3 is arranged, hot water vapor is guided into the pure copper pipe 16 through the arranged air inlet pipe 12, the pure copper pipe has strong heat conductivity, and the outer wall of the pure copper pipe 16 is provided with the heat dissipation fins, so that the heat of the water vapor in the pure copper pipe 16 can be conveniently transferred and recovered, the temperature in the heat dissipation cavity 17 is increased, the pressure in the heat dissipation cavity 17 is increased, hot gas is transferred to the heating cavity 10 through the heat exhaust pipe 11, the soft water tank 2 is conveniently heated, the water in the soft water tank 2 is heated, the heating time in soft water use is conveniently reduced, the efficiency is increased, and the cost is saved; at the mineral wool board 24 that heat preservation shell 4 set up, be convenient for increase thermal insulation performance, the carbon monoxide purifying box 6 of setting contains carbon monoxide in steam, passes through the inside cuprous chloride solution of cuprous chloride solution tank 19 with gas through second blast pipe 18, absorbs carbon monoxide, increases factor of safety.
Detailed description of the utility model
The embodiment is an embodiment of an energy utilization component 3 in a water vapor recycling device for formaldehyde production.
As shown in fig. 1 and 2, an energy utilization assembly 3 for a water vapor recycling device for formaldehyde production includes a heat discharging pipe 11, an air inlet pipe 12, an air blower 13, a first exhaust pipe 14, an installation frame 15, a pure copper pipe 16, a heat dissipating cavity 17 and a second exhaust pipe 18, wherein the heat dissipating cavity 17 is arranged inside a heat collecting box 1, the installation frame 15 is fixedly installed at the left side and the right side of the heat dissipating cavity 17, the pure copper pipe 16 is fixedly installed on the outer surface of the upper end of the installation frame 15, the heat dissipating cavity 17 is installed on the outer surface of the upper end of the heat collecting box 1, one end of the heat discharging pipe 11 extends into a heating cavity 10, and the other end of the heat discharging pipe 11 extends into the upper part of the heat dissipating cavity 17; the blower 13 is fixedly installed on the outer surface of the left side of the heat collecting tank 1, the air inlet pipe 12 is fixedly installed on the outer surface of one end of the blower 13, the first exhaust pipe 14 is fixedly installed on the outer surface of the lower end of the blower 13, one end of the first exhaust pipe 14 is fixedly connected with one end of a pure copper pipe 16, and the second exhaust pipe 18 is fixedly installed on the outer surface of the other end of the pure copper pipe 16; the surface of the pure copper pipe 16 is fixedly provided with a radiating fin.
Detailed description of the preferred embodiment
This embodiment is an embodiment of a carbon monoxide purification tank 6 in a water vapor recycling device for formaldehyde production.
As shown in fig. 1 and 3, the carbon monoxide purifying tank 6 for the steam recycling device for formaldehyde production comprises a cuprous chloride solution tank 19, a drain pipe 20, a drain valve 21, an exhaust hole 22 and a mounting hole 23, wherein the cuprous chloride solution tank 19 is fixedly mounted on the outer surface of the right end of the heat collecting tank 1, the exhaust hole 22 is formed in the right side of the outer surface of the upper end of the cuprous chloride solution tank 19, the mounting hole 23 is formed in the left side of the outer surface of the upper end of the cuprous chloride solution tank 19, the drain pipe 20 is fixedly mounted on the lower portion of the outer surface of one side of the cuprous chloride solution tank 19, and the drain valve 21 is fixedly mounted on the outer surface of one end of the drain pipe 20.
It is noted that, herein, relational terms such as first and second (a, b, etc.) and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, and such changes and modifications are within the scope of the utility model as claimed.
Claims (6)
1. The utility model provides a water vapor cyclic utilization device of formaldehyde production, includes thermal-arrest case (1), its characterized in that: the utility model discloses a solar energy collection device, including heat collection box (1), the outer fixed surface in upper end of heat collection box (1) installs softened water tank (2), the outer wall of softened water tank (2) is provided with lagging casing (4), the inside of heat collection box (1) is provided with energy utilization subassembly (3), the right side outer fixed surface of heat collection box (1) installs carbon monoxide purifying box (6), the four corners fixed mounting of heat collection box (1) lower extreme surface has bracing piece (8), the lower extreme outer fixed surface of bracing piece (8) installs auto-lock universal wheel (7), the upper portion fixed mounting of lagging casing (4) one side surface has relief valve (9), the lower part fixed mounting of softened water tank (2) one side surface has outlet valve (5), just form heating chamber (10) between the outer wall of softened water tank (2) and the inner wall of lagging casing (4).
2. The water vapor recycling device for formaldehyde production according to claim 1, characterized in that: and a mineral wool board (24) is fixedly arranged in the heat-insulating shell (4).
3. The water vapor recycling device for formaldehyde production according to claim 1, characterized in that: energy utilization subassembly (3) are including heat extraction pipe (11), intake pipe (12), air-blower (13), first exhaust pipe (14), mounting bracket (15), pure copper pipe (16), heat dissipation chamber (17) and second blast pipe (18), just the inside in thermal-arrest case (1) is seted up in heat dissipation chamber (17), mounting bracket (15) fixed mounting is in the left and right sides in heat dissipation chamber (17), pure copper pipe (16) fixed mounting is in the upper end surface of mounting bracket (15), just heat dissipation chamber (17) are installed in the upper end surface of thermal-arrest case (1), just the one end of heat extraction pipe (11) is stretched into in heating chamber (10), and the other end of heat extraction pipe (11) stretches into the upper portion in heat dissipation chamber (17).
4. The water vapor recycling device for formaldehyde production according to claim 3, characterized in that: the air blower (13) is fixedly installed on the outer surface of the left side of the heat collecting box (1), the air inlet pipe (12) is fixedly installed on the outer surface of one end of the air blower (13), the first exhaust pipe (14) is fixedly installed on the outer surface of the lower end of the air blower (13), one end of the first exhaust pipe (14) is fixedly connected with one end of the pure copper pipe (16), and the second exhaust pipe (18) is fixedly installed on the outer surface of the other end of the pure copper pipe (16).
5. The water vapor recycling device for formaldehyde production according to claim 3, characterized in that: and the surface of the pure copper pipe (16) is fixedly provided with a radiating fin.
6. The formaldehyde production steam recycling device as claimed in claim 1, wherein: carbon monoxide purifying box (6) are including cuprous chloride solution case (19), drain pipe (20), drain valve (21), exhaust hole (22) and mounting hole (23), just cuprous chloride solution case (19) fixed mounting is in the right-hand member surface of thermal-arrest case (1), the right side of cuprous chloride solution case (19) upper end surface is seted up in exhaust hole (22), the left side of cuprous chloride solution case (19) upper end surface is seted up in mounting hole (23), drain pipe (20) fixed mounting is in the lower part of cuprous chloride solution case (19) one side surface, drain valve (21) fixed mounting is in the one end surface of drain pipe (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122968784.5U CN216448663U (en) | 2021-11-30 | 2021-11-30 | Water vapor recycling device for formaldehyde production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122968784.5U CN216448663U (en) | 2021-11-30 | 2021-11-30 | Water vapor recycling device for formaldehyde production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216448663U true CN216448663U (en) | 2022-05-06 |
Family
ID=81355046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122968784.5U Expired - Fee Related CN216448663U (en) | 2021-11-30 | 2021-11-30 | Water vapor recycling device for formaldehyde production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216448663U (en) |
-
2021
- 2021-11-30 CN CN202122968784.5U patent/CN216448663U/en not_active Expired - Fee Related
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