CN213253670U - VOCs waste gas recovery treatment equipment - Google Patents
VOCs waste gas recovery treatment equipment Download PDFInfo
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- CN213253670U CN213253670U CN202021867232.4U CN202021867232U CN213253670U CN 213253670 U CN213253670 U CN 213253670U CN 202021867232 U CN202021867232 U CN 202021867232U CN 213253670 U CN213253670 U CN 213253670U
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 63
- 239000002912 waste gas Substances 0.000 title claims abstract description 53
- 238000011084 recovery Methods 0.000 title claims abstract description 38
- 238000009833 condensation Methods 0.000 claims abstract description 91
- 230000005494 condensation Effects 0.000 claims abstract description 91
- 239000007788 liquid Substances 0.000 claims abstract description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 13
- 230000014759 maintenance of location Effects 0.000 claims description 10
- 239000003507 refrigerant Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 2
- 230000000739 chaotic effect Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 239000012717 electrostatic precipitator Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- 206010043275 Teratogenicity Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
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- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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- 150000002576 ketones Chemical class 0.000 description 1
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Abstract
The utility model discloses a VOCs waste gas recovery treatment facility, accessible pretreatment filters, removes dust to VOCs waste gas, improves condensation efficiency through increase VOCs waste gas detention time and the chaotic degree in the condensate tank, and the mode through tertiary condensation makes the multiple component that exists in the waste gas all can be liquefied by the condensation, improves VOCs's rate of recovery. The key points of the technical scheme are as follows: the VOCs waste gas recovery treatment equipment comprises a pretreatment device, a condensing tank group, a refrigerating fluid supply device and a recovery device, wherein the pretreatment device comprises a filtering mechanism and a dust removal mechanism; the condensing tank group comprises three condensing tanks which are sequentially communicated, wherein the inner cavity of at least one condensing tank is provided with a central condensing pipe and a spiral guide plate; the refrigerating fluid supply device comprises a water chiller and a liquid nitrogen tank; the recovery device comprises a liquid flow passage and a liquid storage tank, wherein the bottom of the liquid flow passage is obliquely arranged. The VOCs waste gas recovery treatment process comprises the working procedures of preparation, pretreatment, condensation, exhaust and recovery.
Description
Technical Field
The utility model relates to a condensation recovery unit field specifically is a VOCs waste gas recovery treatment facility.
Background
VOCs are volatile organic compounds, are important precursors causing urban dust haze and photochemical smog, mainly come from industries such as coal chemical industry, petrochemical industry, fuel coating manufacturing, solvent manufacturing and the like, and a large number of VOCs exist in industrial waste gas, most of VOCs have uncomfortable special odor, toxicity, irritation, teratogenicity and carcinogenesis, and particularly benzene, toluene, formaldehyde and the like cause great harm to human health.
With the increasing attention on the environment and the promotion of green production and green chemical policies in China, all industries are beginning to make efforts on more effective VOCs recovery and treatment schemes. The recovery processing method commonly used for VOCs waste gas at present is a condensation method, VOCs are condensed and liquefied by a condenser for recovery, but the following defects still exist in the existing condensation recovery technology:
VOCs waste gas passes through the detention time of traditional condenser short, and gaseous and condenser pipe's contact time is short promptly, and gaseous steadily passes through the condenser for VOCs is difficult to contact with the condenser pipe fully, leads to VOCs can't be liquefied by complete condensation, reduces VOCs's rate of recovery.
2. Because the VOCs waste gas may contain various organic matters such as benzene, ketone, lipid, ether and the like, and the condensing temperatures required by various organic matters are different, only part of components of the VOCs waste gas are liquefied after passing through the condenser, and other components are still discharged along with the waste gas.
3. Besides gas components, industrial waste gas is also mixed with partial large solid particles and dust with small particle size, the large solid particles can damage the interior of a condensation pipe and a condenser, the large solid particles are easily deposited on the inner walls of the condensation pipe and the condenser, the performance of the condenser is affected, and tail gas containing the dust is discharged into the air to pollute the environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the problem that exists among the above-mentioned background art, provide a VOCs waste gas recovery treatment facility, accessible pretreatment filters VOCs waste gas, removes dust, improves condensation efficiency through increase VOCs waste gas detention time and the chaos degree in the condensing tank, and the mode through tertiary condensation makes the multiple component that exists in the waste gas all can be liquefied by the condensation, improves VOCs's rate of recovery.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
a VOCs waste gas recovery processing device comprises a pretreatment device, a condensing tank group, a refrigerating fluid supply device and a recovery device, wherein the pretreatment device comprises a filtering mechanism for removing large particles in VOCs waste gas and a dust removing mechanism for removing large particle dust in VOCs waste gas; the condensing tank group comprises three condensing tanks which are sequentially communicated, wherein at least one condensing tank has the following characteristics: the inner cavity of the condensing tank is provided with a central condensing pipe and a spiral guide plate, the central condensing pipe extends downwards from the middle of the top end of the inner cavity of the condensing tank, and the spiral guide plate is arranged around the central condensing pipe; the refrigerating fluid supply device comprises a water chiller and a liquid nitrogen tank; the recovery device comprises a liquid flow channel and a liquid storage tank, wherein the bottom of the liquid flow channel is obliquely arranged.
Preferably, the condensing tank is provided with an air inlet, an air outlet and a liquid outlet, the air inlet is arranged on the side wall of the bottom of the condensing tank, the air outlet is arranged on the side wall of the top of the condensing tank, and the air inlet and the air outlet are respectively positioned on two sides of the condensing tank; and the liquid outlet is provided with a valve and is communicated with the liquid flow passage of the recovery device.
Preferably, a baffle plate is arranged inside the central condensation pipe, the baffle plate divides a pipe cavity of the central condensation pipe into two through cavities, the bottoms of the two through cavities are communicated, and a first opening and a second opening are formed in the top end of the condensation tank by the two through cavities.
Preferably, the central condensation pipe is also provided with a plurality of auxiliary condensation pipes which are circumferentially arranged around the central condensation pipe, the auxiliary condensation pipes are U-shaped, and the auxiliary condensation pipes form a third opening and a fourth opening at the top end of the condensation tank; and the spiral guide plate is provided with a through hole for the auxiliary condensation pipe to pass through.
Preferably, a guide plate for guiding the air flow to the middle part of the condensing tank is arranged on the inner wall of the condensing tank.
Preferably, the tube wall of the central condensation tube and/or the secondary condensation tube is provided with a retention structure for increasing gas retention time.
Preferably, the water chiller is connected to a first condensing tank, and the liquid nitrogen tank is connected to a second and a third condensing tank.
Preferably, the filtering mechanism comprises at least three filter screens with different meshes, and the three filter screens are sequentially arranged according to the order of the meshes from large to small; the dust removal mechanism adopts an electrostatic dust collector.
Preferably, the gas outlet of the last condenser in the condenser group is connected with a gas composition detector.
Compared with the prior art, the VOCs waste gas recovery treatment device adopting the technical scheme has the following beneficial effects:
firstly, the spiral guide plate is arranged in the condensing tank, VOCs waste gas entering the condensing tank can spirally rise along the spiral guide plate, so that the detention time of the VOCs waste gas is prolonged, the VOCs waste gas can be fully contacted with the condensing pipe, and the condensing and liquefying efficiency is improved; in the preferred scheme, a guide plate is arranged on the inner wall of the condensing tank, so that the airflow can be guided to the middle of the condensing tank, and the contact probability of the VOCs waste gas and the condensing pipe is increased; in a further preferred scheme, the retention structures on the pipe walls of the central condensation pipe and/or the auxiliary condensation pipes can slow down the escape speed of the VOCs waste gas from the pipe walls, so that the full condensation and liquefaction of the VOCs are facilitated.
Two, adopt the utility model discloses a VOCs waste gas recovery treatment facility is equipped with the three condensing tanks that communicate in proper order, and because of the difference that lets in the refrigerant liquid, three condensing tanks can set up different temperatures, and the VOCs waste gas after the former condensing tank is handled can directly get into next condensing tank and continue the condensation, makes the abundant condensation liquefaction of VOCs component in the waste gas through this kind of condensation step by step.
Three, adopt the utility model discloses a VOCs waste gas recovery treatment facility can get rid of the solid large granule and the dust in the VOCs waste gas that mix with through three-layer filter screen and electrostatic precipitator among the preceding processing apparatus, is not only favorable to improving retrieve VOCs's purity, can also prevent that solid large granule and dust from destroying condensate tank and condenser pipe, exist the polluting dust in avoiding the exhaust tail gas.
Drawings
Figure 1 is the utility model discloses the structure schematic diagram of VOCs waste gas recovery treatment facility embodiment.
Fig. 2 is a schematic structural diagram of the pretreatment apparatus in this embodiment.
Fig. 3 and 4 are schematic structural views of the condensation tank in this embodiment.
Fig. 5 is a schematic structural view of the central condensation duct and the retention structure in this embodiment.
Fig. 6 is a schematic structural diagram of the spiral guide plate in this embodiment.
Fig. 7 is a schematic structural diagram of a baffle in this embodiment.
Fig. 8 is a schematic view of the flow path of the refrigerant fluid in this embodiment.
FIG. 9 is a process flow diagram of the VOCs waste gas recovery processing technique of the present invention.
Reference numerals: 1. a pretreatment device; 10. a filtering mechanism; 101. filtering with a screen; 11. an electrostatic precipitator; 2. a set of condensing tanks; 20. a condensing tank; 201. an air inlet; 202. an air outlet; 203. a liquid discharge port; 204. a central condenser tube; 2040. a baffle plate; 2041. a first opening; 2042. a second opening; 205. a spiral guide plate; 2050. a through hole; 206. a retention structure; 2060. a vent hole; 207. a secondary condenser tube; 2070. a third opening; 2071. a fourth opening; 208. a baffle; 3. a refrigerant fluid supply device; 30. a water chiller; 31. a liquid nitrogen tank; 4. a recovery device; 40. a liquid flow passage; 41. a storage tank; 5. a valve; 6. a gas component detector.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The equipment for recovering and treating the VOCs waste gas as shown in FIG. 1 comprises a pretreatment device 1, a condensing tank group 2, a refrigerating fluid supply device 3 and a recovery device 4, wherein the condensing tank group 2 comprises three condensing tanks 20 which are arranged side by side, and the three condensing tanks 20 are communicated with each other through a pipeline; the refrigerant fluid supply device 3 includes a water chiller 30 for supplying circulating cold water to the first condensation tank 20 and two liquid nitrogen tanks 31 for supplying liquid nitrogen to the second and third condensation tanks 20.
As shown in fig. 2, the pretreatment device 1 comprises a filtering mechanism 10 and an electrostatic precipitator 11, the filtering mechanism 10 comprises three filtering nets 101 with different mesh numbers, the filtering nets 101 are vertically arranged, the three filtering nets 101 are sequentially arranged at equal intervals according to the order of the mesh numbers from large to small, the mesh numbers of the three filtering nets 101 are sequentially 32, 80 and 180, and the three filtering nets can sequentially intercept solid particles with the particle sizes of more than 500 μm, 180 μm and 80 μm; the electrostatic precipitator 11 is arranged behind the filtering mechanism 10, and when the VOCs waste gas passing through the filtering mechanism 10 passes through the electrostatic precipitator 11, dust in the waste gas is adsorbed and intercepted by the electrostatic precipitator 11.
As shown in fig. 1 and 3, the condensation tank 20 is provided with an air inlet 201, an air outlet 202 and a liquid outlet 203, the air inlet 201 is arranged below the side wall of the condensation tank 20, the air outlet 202 is arranged above the side wall of the condensation tank 20, and the air inlet 201 and the air outlet 202 are respectively arranged at two sides of the condensation tank 20; the liquid outlet 203 is arranged at the bottom end of the condensing tank 20, the liquid outlet 203 is communicated with the liquid flow passage 40 of the recovery device 4, the bottom of the liquid flow passage 40 is inclined, the lower end of the bottom of the liquid flow passage 40 is communicated to the storage tank 41, and a valve 5 is arranged between the liquid outlet 203 and the liquid flow passage 40.
As shown in fig. 3 to 7, a central condensation pipe 204 and a spiral guide plate 205 are disposed in an inner cavity of the condensation tank 20, the central condensation pipe 204 extends downward from the middle of the top end of the inner cavity of the condensation tank 20, the spiral guide plate 205 is disposed around the central condensation pipe 204, a baffle plate 2040 is disposed inside the central condensation pipe 204, the baffle plate 2040 divides the pipe cavity of the central condensation pipe 204 into two semicircular through cavities, bottoms of the two through cavities are communicated, the two through cavities form a first opening 2041 and a second opening 2042 at the top end of the condensation tank 20, and cold water or liquid nitrogen enters the central condensation pipe 204 through the first opening 2041 and flows out through the second opening 2042 to form a circulation flow path.
The wall of the central condenser tube 204 is provided with a retention structure 206 for increasing the gas retention time, the retention structure 206 is a thin plate spirally surrounding the central condenser tube 204, the spiral direction of the thin plate is opposite to the spiral direction of the spiral guide plate 205, a gap of 1-3CM is left between the thin plate and the wall of the central condenser tube 204, and the thin plate is further provided with a plurality of vent holes 2060 uniformly distributed.
The central condensation pipe 204 is further provided with five auxiliary condensation pipes 207, the auxiliary condensation pipes 207 are in a U shape, the five auxiliary condensation pipes 207 are arranged in the circumferential direction of the central condensation pipe 204 at equal intervals, through holes 2050 for the auxiliary condensation pipes 207 to pass through are formed in the spiral guide plate 205, two end portions of the auxiliary condensation pipes 207 face upwards, the auxiliary condensation pipes 207 form third openings 2070 and fourth openings 2071 at the top end of the condensation tank 20, and cold water or liquid nitrogen can enter the auxiliary condensation pipes 207 through the third openings 2070 and flow out through the fourth openings 2071 to form a circulation flow path.
Five guide plates 208 are further arranged on the inner wall of the condensation tank 20, the guide plates 208 are arc-shaped, the guide plates 208 extend to the inside smoothly by 10 CM to 20CM from the inner wall of the condensation tank 20, and the extending direction of the guide plates 208 is consistent with the air flow square formed by the spiral guide plate 205, so that the guide plates 208 are used for guiding the air flow to the central condensation pipe 204 and the auxiliary condensation pipe 207 in the middle of the condensation tank 20.
As shown in fig. 8, the water cooler 30 is connected to the first condensation tank 20, the cold water output from the water cooler 30 is connected to the first opening 2041 of the central condensation pipe 204 and the third opening 2070 of the secondary condensation pipe 207, and the water inlet of the water cooler 30 is connected to the second opening 2042 of the central condensation pipe 204 and the fourth opening 2071 of the secondary condensation pipe 207; the second and third condensing tanks 20 are connected to a liquid nitrogen tank 31 in substantially the same manner as the water chiller 30 is connected to the first condensing tank 20: the output end of the liquid nitrogen tank 31 is connected to the first opening 2041 of the central condensation pipe 204 and the third opening 2070 of the secondary condensation pipe 207, and the vaporized liquid nitrogen is directly discharged into the air from the second opening 2042 of the central condensation pipe 204 and the fourth opening 2071 of the secondary condensation pipe 207.
And the gas outlet 202 of the last condenser in the condenser group is connected with a gas component detector 6 for detecting the content of each component contained in the discharged gas, and if the content of the VOCs component is detected to be greater than the discharge requirement, the gas cannot be directly discharged into the air and needs to be subjected to secondary condensation recovery.
As shown in fig. 9, the recovery processing technology of VOCs waste gas using the recovery processing equipment of VOCs waste gas according to the above technical solution includes the following steps:
1) preparing:
1.1) introducing cold water into a first condensing tank 20, and adjusting the temperature of the first condensing tank 20 to 0-6 ℃;
1.2) introducing liquid nitrogen into the second and third condensing tanks 20, adjusting the temperature of the second condensing tank 20 to-30 to-60 ℃, and adjusting the temperature of the third condensing tank 20 to-100 to-120 ℃;
2) pretreatment:
2.1) introducing the VOCs waste gas containing large solid particles and dust into three filter screens 101 in a filtering mechanism 10 in sequence, and intercepting the particles with the particle size larger than 100 micrometers;
2.2) continuing introducing the filtered VOCs waste gas into the electrostatic dust collector 11, and adsorbing and removing dust of the VOCs waste gas;
3) condensation:
3.1) introducing the pretreated VOCs waste gas into a first condensing tank 20, spirally rising the VOCs waste gas along a spiral guide plate 205, condensing partial components in the VOCs waste gas into liquid organic matters, and allowing the liquid organic matters to flow down along the spiral guide plate 205 and gather at the bottom of the condensing tank 20;
3.2) discharging the VOCs waste gas from the first condensing tank 20 and entering the second condensing tank 20, spirally rising the VOCs waste gas, and condensing the liquefied liquid organic material flow to the bottom of the condensing tank 20;
3.3) discharging the VOCs waste gas from the second condensing tank 20 and entering a third condensing tank 20, spirally rising the VOCs waste gas, and condensing the liquefied liquid organic material flow to the bottom of the condensing tank 20;
4) exhausting: the gas discharged from the third condensing tank 20 passes through a gas sub-detector, and if the gas meets the discharge requirement, the gas is directly discharged into the air; if the discharge requirement is not met, the gas is introduced into the first condensing tank 20 again, and the step 3) is repeated;
5) and (3) recovering: the valves 5 of the liquid outlets 203 at the bottoms of the three condensing tanks 20 are opened, so that the liquid organic matters enter the liquid flow passage 40 and flow into the storage tank 41 along the liquid flow passage 40.
The above description is a preferred embodiment of the present invention, and a person skilled in the art can make several modifications and improvements without departing from the principles of the present invention, and these should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a VOCs waste gas recovery treatment facility which characterized in that: comprises a pretreatment device (1), a condensing tank group (2), a refrigerating fluid supply device (3) and a recovery device (4),
-the pretreatment device (1) comprises a filtering mechanism (10) for removing large particles in the VOCs waste gas and a dedusting mechanism for removing large particle dust in the VOCs waste gas;
-the set of condensing tanks (2) comprises three condensing tanks (20) in communication in sequence, wherein at least one condensing tank (20) has the following characteristics: the inner cavity of the condensing tank (20) is provided with a central condensing pipe (204) and a spiral guide plate (205), the central condensing pipe (204) extends downwards from the middle of the top end of the inner cavity of the condensing tank (20), and the spiral guide plate (205) is arranged around the central condensing pipe (204);
-said refrigerant liquid supply device (3) comprises a water chiller (30) and a liquid nitrogen tank (31);
-the recovery device (4) comprises a liquid flow channel (40) and a liquid storage tank, the bottom of the liquid flow channel (40) is arranged obliquely;
the filtering mechanism (10) comprises at least three filter screens (101) with different meshes, and the three filter screens (101) are sequentially arranged according to the order of the meshes from large to small; the dust removal mechanism adopts an electrostatic dust collector (11);
a gas outlet (202) of the last condenser in the condensing tank group (2) is connected with a gas component detector (6);
a baffle plate (2040) is arranged inside the central condensation pipe (204), the baffle plate (2040) divides a pipe cavity of the central condensation pipe (204) into two through cavities, the bottoms of the two through cavities are communicated, and a first opening (2041) and a second opening (2042) are formed in the two through cavities at the top end of the condensation tank (20); the water cooler (30) is connected to a first condensation tank (20), and the liquid nitrogen tank (31) is connected to a second and a third condensation tank (20).
2. The apparatus according to claim 1, wherein: the condensing tank (20) is provided with an air inlet (201), an air outlet (202) and a liquid outlet (203), the air inlet (201) is arranged on the side wall of the bottom of the condensing tank (20), the air outlet (202) is arranged on the side wall of the top of the condensing tank (20), and the air inlet (201) and the air outlet (202) are respectively positioned on two sides of the condensing tank (20); the liquid outlet (203) is provided with a valve (5), and the liquid outlet (203) is communicated with the liquid flow channel (40) of the recovery device (4).
3. The apparatus according to claim 1, wherein: the central condensation pipe (204) is also provided with a plurality of auxiliary condensation pipes (207), the plurality of auxiliary condensation pipes (207) are arranged around the central condensation pipe (204) in the circumferential direction, the auxiliary condensation pipes (207) are U-shaped, and the auxiliary condensation pipes (207) form a third opening (2070) and a fourth opening (2071) at the top end of the condensation tank (20); and a through hole (2050) for the auxiliary condensation pipe (207) to pass through is arranged on the spiral guide plate (205).
4. The VOCs waste gas recovery processing device of claim 1 or 3, characterized in that: and a guide plate (208) for guiding the air flow to the middle part of the condensation tank (20) is arranged on the inner wall of the condensation tank (20).
5. The apparatus according to claim 4, wherein: and a retention structure (206) for increasing gas retention time is arranged on the pipe wall of the central condensation pipe (204) and/or the secondary condensation pipe (207).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021867232.4U CN213253670U (en) | 2020-08-31 | 2020-08-31 | VOCs waste gas recovery treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021867232.4U CN213253670U (en) | 2020-08-31 | 2020-08-31 | VOCs waste gas recovery treatment equipment |
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| Publication Number | Publication Date |
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| CN213253670U true CN213253670U (en) | 2021-05-25 |
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| CN202021867232.4U Active CN213253670U (en) | 2020-08-31 | 2020-08-31 | VOCs waste gas recovery treatment equipment |
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| Country | Link |
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| CN (1) | CN213253670U (en) |
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Effective date of registration: 20231220 Address after: 311118, 2nd Floor, Building 8, Wangweishan Village, Huanghu Town, Yuhang District, Hangzhou City, Zhejiang Province, China 208 Patentee after: Hangzhou Xiuge Machinery Co.,Ltd. Address before: 313101 wushangang Industrial Park, Lincheng Town, Changxing County, Huzhou City, Zhejiang Province Patentee before: Zhejiang Xiuge Machinery Co.,Ltd. |