CN220047670U - System for sectional type handles laboratory organic waste gas - Google Patents
System for sectional type handles laboratory organic waste gas Download PDFInfo
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- CN220047670U CN220047670U CN202223174141.4U CN202223174141U CN220047670U CN 220047670 U CN220047670 U CN 220047670U CN 202223174141 U CN202223174141 U CN 202223174141U CN 220047670 U CN220047670 U CN 220047670U
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- waste gas
- dry
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- treatment module
- gas treatment
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- 239000007789 gas Substances 0.000 title claims abstract description 88
- 239000010815 organic waste Substances 0.000 title claims abstract description 27
- 239000002912 waste gas Substances 0.000 claims abstract description 76
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000003795 desorption Methods 0.000 claims abstract description 16
- 238000001179 sorption measurement Methods 0.000 claims description 21
- 239000002250 absorbent Substances 0.000 claims description 13
- 230000002745 absorbent Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 19
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 239000001509 sodium citrate Substances 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The utility model discloses a system for treating laboratory organic waste gas in a sectional manner, which belongs to the technical field of waste gas treatment and comprises an air inlet pipe and further comprises: the utility model has the advantages that the integrated effect of organic waste gas treatment with high concentration and low concentration is realized by arranging the first sensor and the dry and wet treatment module, the low-concentration waste gas is purified by the dry waste gas treatment module, meanwhile, the second sensor is arranged around the activated carbon for detection, when the activated carbon is adsorbed to reach a saturation value, the desorbed gas and the high-concentration gas enter the wet waste gas treatment module together for removal by an absorption method, the activated carbon after the desorption can be recycled, thus recycling of resources can be realized, and the application of the sensor can also enable us to know the treatment condition of the organic waste gas in real time, so that the process of waste gas treatment can be better controlled.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment, in particular to a system for treating organic waste gas in a laboratory in a sectional mode.
Background
The adsorption method is one of the methods for treating waste gas in laboratory, and its working principle is to utilize some substances with adsorption capacity, such as active carbon, silica gel, zeolite molecular sieve, active alumina, etc. to adsorb harmful components in mixed gas so as to attain the goal of treating waste gas. In addition to the adsorption method, there is a method for absorbing waste gas by a solution, which is called an absorption method for short. The method has earlier application time, and the specific working principle is to separate, purify and absorb harmful components by utilizing the different solubilities of the waste gas components in the absorbent, so that the method can well treat dust-containing harmful gases in the waste gas, and is suitable for treating organic waste gas with higher concentration, lower temperature and higher pressure.
The prior art and the defects thereof:
1) The wet waste gas treatment adopts an acid mist absorption tower to treat waste gas, is suitable for purifying water-soluble gases such as hydrogen chloride gas (HCl), hydrogen fluoride gas (HF), ammonia gas (NH 3), sulfuric acid mist (H2S 04), chromic acid mist (Cr 03), hydrogen cyanide acid gas (HCN), hydrogen sulfide gas (H2S), low-fluidity NOx waste gas and the like, and has the basic principle that the acid mist waste gas is pressed into the absorption tower by a fan, is sprayed through an inlet and is subjected to a neutralization reaction with an intermediate packing layer, and the purified gas is subjected to deliquifying treatment and then is discharged at high altitude. It is widely used for treating acid-base waste gas. But it occupies a large area, consumes a large amount of absorbent, and may cause secondary pollution.
2) The dry method waste gas treatment generally adopts an organic gas activated carbon adsorption device, volatile organic matters in the waste gas are adsorbed on the surface of the waste gas by means of the adsorption capacity of activated carbon molecules, and the adsorbed organic matters can be reused for production through simple treatment. However, because different exhaust gases have different physical and chemical properties, adsorbents with different performances are required to be configured to play a good role in purifying the exhaust gases, and therefore, the adsorbents need to be replaced or regenerated periodically to ensure the normal operation of the absorption device. This also results in the need for substantial human and financial input in practical applications, and is only suitable for the treatment of organic waste gases with stable components and low concentrations.
At present, in the actual investigation process, a lot of activated carbon adopted by an adsorption method is found, in the replacement process, the adsorption condition of the activated carbon is difficult to be known by a worker, if the activated carbon is not replaced in time, the desorption effect is carried out when the activated carbon adsorption reaches a saturation value, and secondary pollution is caused, so that the system for treating the organic waste gas in the laboratory in a sectional mode is provided.
Disclosure of Invention
The present utility model has been made in view of the above and/or problems with existing systems for the staged treatment of laboratory organic waste gases.
It is therefore an object of the present utility model to provide a system for staged treatment of laboratory organic waste gases which solves the above mentioned problems presenting the prior art.
In order to solve the technical problems, according to one aspect of the present utility model, the following technical solutions are provided:
a system for staged treatment of laboratory organic waste gas comprising an air inlet pipe, further comprising:
the first sensor is used for detecting the concentration of the exhaust gas in the air inlet pipe and is arranged on the air inlet pipe;
and the dry-wet processing module is used for carrying out corresponding processing according to the concentration detected by the first sensor and is connected with the air inlet pipe.
As a preferred embodiment of a system for the staged treatment of laboratory organic waste gas according to the utility model, wherein: the dry and wet processing module includes:
the dry waste gas treatment module is used for carrying out adsorption treatment on low-concentration waste gas by adopting organic gas activated carbon and is connected with the air inlet pipe;
the wet-process waste gas treatment module is used for absorbing and treating the high-concentration waste gas by adopting an absorbent, and is connected with the air inlet pipe and connected with the dry-process waste gas treatment module;
a second sensor for detecting an adsorption saturation value of the activated carbon;
and when the adsorption saturation value of the activated carbon reaches a set value, the heating desorption module is used for heating the dry waste gas treatment module so that waste gas adsorbed by the dry waste gas treatment module enters the wet waste gas treatment module, and the heating desorption module is connected with the dry waste gas treatment module.
As a preferred embodiment of a system for the staged treatment of laboratory organic waste gas according to the utility model, wherein: the wet and dry processing module further comprises:
the clean gas discharge module is used for feeding and discharging the gas reaching the standard, and is connected with the dry method waste gas treatment module;
and the small blower is used for adjusting the flow rate of the gas so as to enable the gas to flow smoothly, and is connected between the clean gas discharge module and the dry waste gas treatment module.
As a preferred embodiment of a system for the staged treatment of laboratory organic waste gas according to the utility model, wherein: the active carbon in the dry method waste gas treatment module adopts granular active carbon.
As a preferred embodiment of a system for the staged treatment of laboratory organic waste gas according to the utility model, wherein: the wet process exhaust treatment module includes:
the air inlet of the container is connected with the air inlet pipe, and the air outlet of the container is connected with the dry waste gas treatment module;
a spraying system for spraying the absorbent in an atomized state in the container, and the spraying system is provided in the container.
Compared with the prior art:
through setting up first sensor and wet and dry processing module, have the effect that realizes the organic waste gas treatment integration of high concentration low concentration, low concentration waste gas is purified through dry waste gas processing module, install the second sensor around the active carbon simultaneously and detect, carry out the desorption effect when the active carbon adsorbs and reach the saturation value, the gas of desorption gets into wet waste gas processing module with high concentration gas and utilizes the absorption method to get rid of, the active carbon after the desorption effect can reuse, can realize the cyclic utilization of resource like this, the application of sensor also can let us know the treatment condition of organic waste gas in real time, the process of controlling waste gas treatment is better.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a flow chart of the present utility model.
In the figure: the system comprises an air inlet pipe 10, a first sensor 11, a dry and wet treatment module 20, a dry exhaust treatment module 21, a wet exhaust treatment module 22, a container 221, a spraying system 222, a small blower 30, a second sensor 40 and a clean gas emission module 50.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.
The utility model provides a system for treating laboratory organic waste gas in a sectional manner, referring to fig. 1-2, which comprises an air inlet pipe 10, a first sensor 11 for detecting the concentration of the waste gas in the air inlet pipe 10, and a dry-wet treatment module 20 for carrying out corresponding treatment according to the concentration detected by the first sensor 11;
and the first sensor 11 is provided on the intake pipe 10, and the dry-wet processing module 20 is connected with the intake pipe 10.
The wet and dry processing module 20 includes: a dry waste gas treatment module 21 for absorbing low-concentration waste gas by using organic gas activated carbon, a wet waste gas treatment module 22 for absorbing high-concentration waste gas by using an absorbent, a second sensor 40 for detecting the adsorption saturation value of the activated carbon, a heating desorption module for heating the dry waste gas treatment module 21 when the adsorption saturation value of the activated carbon reaches a set value, so that the waste gas absorbed by the dry waste gas treatment module 21 enters the wet waste gas treatment module 22, a clean gas discharge module 50 for supplying and discharging standard gas, and a small blower 30 for regulating the flow rate of the gas, so that the gas circulation is smooth;
and the dry exhaust gas treatment module 21 is connected with the air inlet pipe 10, and the wet exhaust gas treatment module 22 is connected with the air inlet pipe 10, the wet exhaust gas treatment module 22 is connected with the dry exhaust gas treatment module 21, and the heating desorption module is connected with the dry exhaust gas treatment module 21, the heating desorption module is installed at the activated carbon, and the clean gas discharge module 50 is connected with the dry exhaust gas treatment module 21, and the small blower 30 is connected between the clean gas discharge module 50 and the dry exhaust gas treatment module 21, wherein the dry exhaust gas treatment module 21 is a dry exhaust gas treatment technology of the prior art, the wet exhaust gas treatment module 22 is a wet exhaust gas treatment technology of the prior art, the heating desorption module is preferably a heating pipe, the clean gas discharge module 50 is preferably an exhaust pipe, and the second sensor 40 is installed around the activated carbon.
The activated carbon in the dry waste gas treatment module 21 adopts granular activated carbon, and the granular activated carbon has a developed pore structure, so that the contact area with waste gas can be greatly increased, the granular activated carbon is easy to regenerate repeatedly, has low manufacturing cost and is portable, is a good adsorption material, and besides, the adsorption capacity of the activated carbon fiber to volatile organic matters is several times to tens times higher than that of the granular activated carbon in the air, the speed is high, the recovery rate can reach 90 percent, but due to the higher manufacturing cost, the adsorption of the waste gas can be carried out in a mode of mixing with zeolite molecular sieve (a hydrate of crystalline aluminosilicate metal salt).
The wet exhaust treatment module 22 includes: a container 221, a spraying system 222 for spraying the absorbent in an atomized state in the container;
the air inlet of the container 221 is connected with the air inlet pipe 10, the air outlet of the container 221 is connected with the dry waste gas treatment module 21, the spraying system 222 is arranged in the container 221, the spraying system 222 is a small spraying tower, the spraying system 222 fully atomizes the absorbent and then uniformly mixes and reacts with the waste gas in the container 221, so that a good absorption effect is achieved, and when the acid waste gas is absorbed, sodium hydroxide alkali liquor is selected as the absorbent; when absorbing benzene-containing waste gas, sodium citrate solution is selected as an absorbent because sodium citrate has both hydrophilic groups (which are easily combined with water) and lipophilic groups (which are easily combined with benzene molecules); when alkaline waste gas is absorbed, sulfur-containing waste liquid is selected as an absorbent.
Working principle: the waste gas generated in the laboratory enters the dry and wet treatment module 20 according to the concentration after being detected by the first sensor 11, and when the concentration is less than 0.1mg/m 3 When the organic waste gas enters the dry waste gas treatment module 21, the treated waste gas reaches the standard through the concentration sensor, and then clean gas is discharged through the clean gas discharge module 50; when the concentration is more than 0.1mg/m < 3 >, the organic waste gas enters the wet waste gas treatment module 22 through another pipeline, is absorbed by the absorbent (periodically replaced) and then is subjected to secondary purification through the dry waste gas treatment module 21, and is discharged after reaching the standard after detection;
when the second sensor 40 detects that the activated carbon adsorption is close to 80% of the saturation value, the system is in an idle period, and the dry waste gas treatment module 21 starts the heating desorption module to enable the adsorbed organic waste gas to enter the wet waste gas treatment module 22; if the system is in the adsorption period, the system continues to work to the desorption period; the activated carbon in the dry waste gas treatment module 21 is replaced 1 time every 10 operating cycles, and the small blower 30 is arranged to enable the concentration sensor to detect that the gas reaching the standard is discharged through the clean gas discharge module 50, and the gas and the residual gas escaping after desorption enter the wet waste gas treatment module 22 for absorption.
Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. A system for the staged treatment of laboratory organic waste gases, comprising an inlet pipe (10), characterized in that it further comprises:
a first sensor (11) for detecting the concentration of exhaust gas in the intake pipe (10), the first sensor (11) being provided on the intake pipe (10);
and the dry-wet processing module (20) is used for carrying out corresponding processing according to the concentration detected by the first sensor (11), and the dry-wet processing module (20) is connected with the air inlet pipe (10).
2. A system for the staged treatment of laboratory organic waste gas according to claim 1, characterized in that the wet and dry treatment module (20) comprises:
a dry waste gas treatment module (21) for carrying out adsorption treatment on low-concentration waste gas by adopting organic gas activated carbon, wherein the dry waste gas treatment module (21) is connected with the air inlet pipe (10);
a wet exhaust gas treatment module (22) for absorbing and treating high-concentration exhaust gas by using an absorbent, wherein the wet exhaust gas treatment module (22) is connected with the air inlet pipe (10), and the wet exhaust gas treatment module (22) is connected with the dry exhaust gas treatment module (21);
a second sensor (40) for detecting the adsorption saturation value of the activated carbon;
and when the adsorption saturation value of the activated carbon reaches a set value, the heating desorption module is used for heating the dry waste gas treatment module (21) so that waste gas adsorbed by the dry waste gas treatment module (21) enters the wet waste gas treatment module (22), and the heating desorption module is connected with the dry waste gas treatment module (21).
3. A system for the staged treatment of laboratory organic waste gas according to claim 2, wherein the wet and dry treatment module (20) further comprises:
the clean gas discharge module (50) is used for supplying and discharging the gas reaching the standard, and the clean gas discharge module (50) is connected with the dry waste gas treatment module (21);
a small blower (30) for adjusting the flow rate of the gas so that the gas flows smoothly, and the small blower (30) is connected between the clean gas discharge module (50) and the dry waste gas treatment module (21).
4. A system for staged treatment of laboratory organic waste gas according to claim 2, characterized in that the activated carbon in the dry waste gas treatment module (21) is granular activated carbon.
5. A system for staged treatment of laboratory organic waste gas according to claim 2, characterized in that the wet waste gas treatment module (22) comprises:
the device comprises a container (221), wherein an air inlet of the container (221) is connected with an air inlet pipe (10), and an air outlet of the container (221) is connected with a dry waste gas treatment module (21);
a spraying system (222) for spraying the absorbent in an atomized state in the container, and the spraying system (222) is provided in the container (221).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223174141.4U CN220047670U (en) | 2022-11-29 | 2022-11-29 | System for sectional type handles laboratory organic waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223174141.4U CN220047670U (en) | 2022-11-29 | 2022-11-29 | System for sectional type handles laboratory organic waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220047670U true CN220047670U (en) | 2023-11-21 |
Family
ID=88787826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223174141.4U Active CN220047670U (en) | 2022-11-29 | 2022-11-29 | System for sectional type handles laboratory organic waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220047670U (en) |
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2022
- 2022-11-29 CN CN202223174141.4U patent/CN220047670U/en active Active
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