CN113230882A - Integrative equipment of laboratory exhaust-gas treatment - Google Patents
Integrative equipment of laboratory exhaust-gas treatment Download PDFInfo
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- CN113230882A CN113230882A CN202110590662.9A CN202110590662A CN113230882A CN 113230882 A CN113230882 A CN 113230882A CN 202110590662 A CN202110590662 A CN 202110590662A CN 113230882 A CN113230882 A CN 113230882A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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Abstract
The invention discloses laboratory waste gas treatment integrated equipment which comprises a spraying treatment section and an adsorption purification section, wherein a waste gas inlet pipe is arranged on the spraying treatment section, an air inlet pipe is arranged on the adsorption purification section, and the air inlet pipe is positioned below an adsorbent; the adsorption regeneration section is provided with a regeneration air inlet pipe and a regeneration air outlet pipe communicated with the air inlet pipe; a catalytic bed is arranged in the adsorption regeneration section, a heat exchanger is arranged below the catalytic bed, and a regeneration air inlet pipe is communicated with the heat exchanger; the top of the adsorption purification section is provided with a first air outlet pipe and a second air outlet pipe; an exhaust fan is arranged on the adsorption regeneration section and is communicated with a second air outlet pipe and a regeneration air inlet pipe; valves are respectively arranged on the regeneration air inlet pipe, the regeneration air outlet pipe, the first air outlet pipe, the second air outlet pipe and the air inlet pipe. The invention adds the adsorbent regeneration section, the adsorbent saturated in adsorption can be desorbed and regenerated through the regeneration section, the adsorption function is realized again, and simultaneously the waste gas is converted into carbon dioxide and water.
Description
Technical Field
The invention relates to the field of laboratory waste gas treatment equipment, in particular to laboratory waste gas treatment integrated equipment.
Background
The traditional laboratory waste gas treatment process is divided into two-stage treatment, inorganic gas is removed by a spraying treatment stage and then directly enters an activated carbon adsorption tank, and organic gas is removed by the activated carbon adsorption tank. Although the treatment process can meet the requirement of waste gas treatment, waste gas discharged by a laboratory is generally gas with large air quantity and low concentration, after the gas is used for a certain time, the activated carbon can reach a saturated state, and the activated carbon can not adsorb pollutants in organic waste gas; if the active carbon is replaced, the whole replacement period is short, and the project maintenance cost is high.
Disclosure of Invention
The invention aims to provide a laboratory waste gas treatment integrated device.
The invention has the innovation points that the adsorbent regeneration section is added, the adsorbent saturated in adsorption can be desorbed and regenerated through the regeneration section, the adsorption function is realized again, the service life of the adsorbent is prolonged, the replacement period of the adsorbent is shortened, and the maintenance cost is reduced; and simultaneously, the waste gas can be converted into carbon dioxide and water.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a laboratory waste gas treatment integrated device comprises a spraying treatment section and an adsorption purification section communicated with the upper part of the spraying treatment section, wherein a waste gas inlet pipe is arranged on the outer side wall of the spraying treatment section, an adsorbent is arranged in the adsorption purification section, an air inlet pipe is arranged on the outer side wall of the adsorption purification section, and the air inlet pipe is positioned below the adsorbent and also comprises an adsorption regeneration section; a regeneration air inlet pipe and a regeneration air outlet pipe are arranged on the outer side wall of the adsorption regeneration section, and the regeneration air outlet pipe is communicated with an air inlet pipe; a catalytic bed is arranged in the adsorption regeneration section, a heat exchanger is arranged below the catalytic bed, and an outlet of the regeneration air inlet pipe is communicated with an inlet of the heat exchanger; a first air outlet pipe and a second air outlet pipe are arranged at the top of the adsorption purification section; an exhaust fan is arranged on the outer side wall of the adsorption regeneration section, an air inlet of the exhaust fan is communicated with an outlet of the second air outlet pipe, and an air outlet of the exhaust fan is communicated with a regeneration air inlet pipe; valves are respectively arranged on the regeneration air inlet pipe, the regeneration air outlet pipe, the first air outlet pipe, the second air outlet pipe and the air inlet pipe. Gas is introduced into the adsorption purification section from a regeneration air inlet pipe through an exhaust fan, enters a catalytic bed after being heated by a heat exchanger, and is subjected to oxidation-reduction reaction with organic waste gas to produce carbon dioxide and water; the service life of the adsorbent is prolonged, the replacement period of the adsorbent is shortened, and the maintenance cost is reduced. The catalyst is laid in the catalyst bed, the catalyst bed is heated by an internal electric heater at the beginning, and the catalyst bed and the organic waste gas can generate oxidation-reduction reaction to produce carbon dioxide and water under the condition that the heating temperature is 200-300 ℃; the heat exchanger heats the gas between the catalytic beds by using the heat emitted by the oxidation-reduction reaction, so that the heat balance can be realized under a certain concentration, the catalytic beds do not need to be heated by an electric heater, and the energy consumption is saved.
Preferably, two partition plates are vertically arranged in the adsorption regeneration section, and the lower end surfaces of the two partition plates are respectively connected with the upper surface of the heat exchanger; airflow channels are respectively formed between the two clapboards and the inner side wall of the adsorption regeneration section and the upper surface of the heat exchanger; the upper parts of the two airflow channels are communicated with each other, and the lower parts of the two airflow channels are respectively communicated with the outlet of the heat exchanger; said catalytic bed is located between two separators. The two airflow channels respectively correspond to the two outlets of the heat exchanger, so that the heat emitted by the heat exchanger directly flows to the catalytic bed through the airflow channels in a centralized manner, the catalytic bed is heated in a centralized manner, and the oxidation-reduction reaction speed of the catalytic bed is accelerated.
Preferably, a pipeline positioned above the adsorbent is horizontally arranged in the adsorption purification section, and a plurality of small holes are formed in the pipeline; the lower ends of the first air outlet pipe and the second air outlet pipe are respectively communicated with the side wall of the pipeline. The valve of the second air outlet pipe is closed, the waste gas entering from the spraying treatment section enters the adsorption purification section, then enters the pipeline through the adsorption of the adsorbent, and then is discharged from the first air outlet pipe, so that the purification is realized; the valve of the first air outlet pipe is closed, and the waste gas desorbed from the adsorption regeneration section enters the adsorption purification section, enters the pipeline after being adsorbed by the adsorbent, and is discharged from the second air outlet pipe to realize regeneration. The small holes enable the waste gas adsorbed by the adsorbent to uniformly flow into the pipeline, and the load when the waste gas is discharged from the air outlet pipe is reduced.
Preferably, a drying and filtering section is arranged between the spraying treatment section and the adsorption and purification section; a through hole communicated with the upper part of the drying and filtering section is arranged above the spraying treatment section; the lower part of the drying and filtering section is communicated with an air inlet pipe; a plate type filter is arranged in the drying and filtering section; the plate filter is positioned between the through hole and the air inlet pipe. The drying and filtering section is added to dry and filter a small amount of water vapor brought out by the spraying treatment section, so that the service life of subsequent working equipment is prolonged; the plate filter has the advantages of long service life and good filtering effect.
Preferably, a gas distributor is arranged in the spraying treatment section and is positioned at an outlet of the waste gas inlet pipe. And a gas distributor is added, so that the gas flows uniformly, and the load of the subsequent adsorbent is reduced.
Preferably, a spraying device is arranged in the spraying treatment section; the spraying device comprises a water tank arranged at the bottom of the spraying treatment section, a water pump arranged in the water tank, a water inlet pipe vertically arranged at the water outlet of the water pump, a spraying pipe horizontally arranged at the outlet of the water inlet pipe and a plurality of spraying heads arranged on the spraying pipe; wherein each spray header is evenly distributed on the spray pipe, and the spray headers face downwards. The water pump sucks the water in the water tank into the water inlet pipe, then the water enters the spray pipes and is sprayed out from each spray head, and the sprayed water is contacted with impurity particles in the waste gas to increase the volume of the impurity particles, so that the impurity particles fall into the water tank under the action of gravity to be precipitated and are not discharged along with the waste gas, and the purpose of waste gas treatment is achieved; the water in the water tank can be recycled, so that resources are saved.
Preferably, a first packing layer and a second packing layer are arranged in the spraying treatment section, and the spraying pipe is positioned between the first packing layer and the second packing layer. The filler is arranged in the filler layer and is used as mass transfer equipment of a gas-liquid two-phase contact component, so that gas and liquid are strongly mixed with each other.
The invention has the beneficial effects that:
1. the adsorbent regeneration section is added, the adsorbent saturated in adsorption can be desorbed and regenerated through the regeneration section, the adsorption function is realized again, the service life of the adsorbent is prolonged, the replacement period of the adsorbent is shortened, and the maintenance cost is reduced; and simultaneously, the waste gas can be converted into carbon dioxide and water.
2. The invention adds the drying and filtering section to dry and filter a small amount of water vapor brought out by the spraying section, thereby prolonging the service life of equipment in the subsequent working section.
3. In the invention, the gas distributor is added in the spraying treatment section, so that the gas flows uniformly, and the load of the subsequent adsorbent is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure:
1. a spraying treatment section; 11. an exhaust gas inlet pipe; 12. a gas distributor; 13. a through hole; 14. a first filler layer; 15. a second packing layer; 2. a drying and filtering section; 21. a plate filter; 3. an adsorption purification section; 31. an air inlet pipe; 32. a first air outlet pipe; 33. a second air outlet pipe; 34. a pipeline; 341. a small hole; 35. an adsorbent; 4. an adsorption regeneration section; 41. regenerating an air inlet pipe; 42. regenerating an air outlet pipe; 43. an exhaust fan; 44. a catalytic bed; 45. a heat exchanger; 5. a spraying device; 51. a water pump; 52. a water inlet pipe; 53. a shower pipe; 54. a shower head; 55. a water tank; 6. a valve; 7. a partition plate; 71. an air flow channel.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, a laboratory waste gas treatment integrated device comprises a spraying treatment section 1, a drying and filtering section 2, an adsorption and purification section 3 and an adsorption and regeneration section 4 which are sequentially communicated; wherein, the outer side wall of the spraying treatment section 1 is provided with a waste gas inlet pipe 11, and a through hole 13 communicated with the upper part of the drying and filtering section 2 is arranged above the spraying treatment section 1; a gas distributor 12 positioned at the outlet of the waste gas inlet pipe 11 is arranged in the spraying treatment section 1, a first packing layer 14 and a second packing layer 15 are horizontally arranged between the gas distributor 12 and the through hole 13, and the packing in the packing layers can be but is not limited to Raschig rings.
As shown in fig. 1, a spraying device 5 is arranged in the spraying treatment section 1, and the spraying device 5 comprises a water tank 55 arranged at the bottom of the spraying treatment section 1, a water pump 51 arranged in the water tank 55, a water inlet pipe 52 vertically arranged at the water outlet of the water pump 51, a spraying pipe 53 horizontally arranged at the outlet of the water inlet pipe 52, and a plurality of spraying heads 54 uniformly distributed on the spraying pipe 53; wherein the spray pipes 53 are positioned between the first packing layer and the second packing layer, and the spray direction of each spray head 54 is downward.
As shown in fig. 1, the lower part of the outer side wall of the drying and filtering section 2 is communicated with the lower part of the outer side wall of the adsorption and purification section 3 through an air inlet pipe 31, a plate-type filter 21 is arranged in the drying and filtering section 2, and the plate-type filter 21 is positioned between the through hole 13 and the air inlet pipe 31.
As shown in fig. 1, a plurality of layers of adsorbents 35 are disposed in the adsorption purification section 3, a pipeline 34 is horizontally disposed above the top layer of adsorbents 35, a plurality of small holes 341 are disposed on the outer side wall of the pipeline 34, a first air outlet pipe 32 and a second air outlet pipe 33 which are communicated with the pipeline 34 are respectively disposed on the outer side wall of the pipeline 34, and one ends of the first air outlet pipe 32 and the second air outlet pipe 33, which are far away from the pipeline 34, respectively penetrate out of the top of the spray treatment section 1.
As shown in fig. 1, an exhaust fan 43 with an air inlet communicated with the second air outlet pipe 33, a regeneration air inlet pipe 41 communicated with an air outlet of the exhaust fan 43, and a regeneration air outlet pipe 42 communicated with the air inlet pipe 31 are arranged on the outer side wall of the adsorption regeneration section 4; valves 6 are respectively arranged on the regeneration air inlet pipe 41, the regeneration air outlet pipe 42, the first air outlet pipe 32, the second air outlet pipe 33 and the air inlet pipe 31.
A heat exchanger 45 with an inlet communicated with an outlet of the regeneration air inlet pipe 41 is arranged in the adsorption regeneration section 4, two outlets of the heat exchanger 45 are respectively and vertically provided with two clapboards 7, the lower end surfaces of the two clapboards 7 are respectively connected with the upper surface of the heat exchanger 45, and the other pair of opposite two sides are respectively connected with the inner side wall of the adsorption regeneration section 4; gas flow channels 71 suitable for gas flowing at the outlet of the heat exchanger 45 are formed between the two partition plates 7 and the inner side wall of the adsorption regeneration section 4 and the upper surface of the heat exchanger 45 respectively, and the upper parts of the two gas flow channels 71 are communicated with each other; a catalytic bed 44 is arranged between the two separators 7.
In view of the above, it is desirable to provide,
when the laboratory waste gas treatment integrated equipment is used, laboratory waste gas enters the gas distributor 12 from the waste gas inlet pipe 11, so that the gas uniformly flows into the spraying treatment section 1; at this time, the water pump 51 sucks the water in the water tank 55 from the water inlet pipe 52 into the shower pipes 53, and then ejects the water from the respective shower heads 54 to perform the exhaust gas treatment; the treated waste gas enters the drying and filtering section 2, is dried and filtered by the plate type filter 21 and then enters the adsorption and purification section 3 from the air inlet pipe 31, at the moment, the valve 6 on the second air outlet pipe 33 is closed, and the waste gas is exhausted from the first air outlet pipe 32 after being adsorbed by the adsorbent 35, so that the purification is realized; the valve 6 on the second air-out pipe 33 is opened, the valve 6 on the first air-out pipe 32 is closed, the exhaust fan 43 sucks the waste gas at the second air-out pipe 33 into the adsorption regeneration section 4, after heat exchange through the heat exchanger 45, the waste gas enters the catalyst and the organic waste gas from the two air flow channels 71 respectively to undergo redox reaction, carbon dioxide and water are produced, then the waste gas enters the adsorption purification section 3 from the regeneration air-out pipe 42, and is discharged to the exhaust fan 43 from the second air-out branch pipe, regeneration is realized, the service life of the adsorbent 35 is prolonged, the replacement period of the adsorbent 35 is shortened, and the maintenance cost is reduced.
Claims (7)
1. A laboratory waste gas treatment integrated device comprises a spraying treatment section and an adsorption purification section communicated with the upper part of the spraying treatment section, wherein a waste gas inlet pipe is arranged on the outer side wall of the spraying treatment section, an adsorbent is arranged in the adsorption purification section, an air inlet pipe is arranged on the outer side wall of the adsorption purification section, and the air inlet pipe is positioned below the adsorbent; a regeneration air inlet pipe and a regeneration air outlet pipe are arranged on the outer side wall of the adsorption regeneration section, and the regeneration air outlet pipe is communicated with an air inlet pipe; a catalytic bed is arranged in the adsorption regeneration section, a heat exchanger is arranged below the catalytic bed, and an outlet of the regeneration air inlet pipe is communicated with an inlet of the heat exchanger; a first air outlet pipe and a second air outlet pipe are arranged at the top of the adsorption purification section; an exhaust fan is arranged on the outer side wall of the adsorption regeneration section, an air inlet of the exhaust fan is communicated with an outlet of the second air outlet pipe, and an air outlet of the exhaust fan is communicated with a regeneration air inlet pipe; valves are respectively arranged on the regeneration air inlet pipe, the regeneration air outlet pipe, the first air outlet pipe, the second air outlet pipe and the air inlet pipe.
2. The laboratory waste gas treatment integrated equipment according to claim 1, wherein two partition plates are vertically arranged in the adsorption regeneration section, and the lower end surfaces of the two partition plates are respectively connected with the upper surface of the heat exchanger; airflow channels are respectively formed between the two clapboards and the inner side wall of the adsorption regeneration section and the upper surface of the heat exchanger; the upper parts of the two airflow channels are communicated with each other, and the lower parts of the two airflow channels are respectively communicated with the outlet of the heat exchanger; said catalytic bed is located between two separators.
3. The laboratory waste gas treatment integrated equipment according to claim 1, wherein a pipeline positioned above the adsorbent is horizontally arranged in the adsorption purification section, and a plurality of small holes are formed in the pipeline; the lower ends of the first air outlet pipe and the second air outlet pipe are respectively communicated with the side wall of the pipeline.
4. The laboratory exhaust gas treatment integrated equipment according to claim 2, wherein a drying and filtering section is arranged between the spraying treatment section and the adsorption and purification section; a through hole communicated with the upper part of the drying and filtering section is arranged above the spraying treatment section; the lower part of the drying and filtering section is communicated with an air inlet pipe; a plate type filter is arranged in the drying and filtering section; the plate filter is positioned between the through hole and the air inlet pipe.
5. The laboratory exhaust treatment integrated device according to claim 4, wherein a gas distributor is arranged in the spraying treatment section and is located at an outlet of the exhaust inlet pipe.
6. The laboratory exhaust treatment integrated equipment according to claim 5, wherein a spraying device is arranged in the spraying treatment section; the spraying device comprises a water tank arranged at the bottom of the spraying treatment section, a water pump arranged in the water tank, a water inlet pipe vertically arranged at the water outlet of the water pump, a spraying pipe horizontally arranged at the outlet of the water inlet pipe and a plurality of spraying heads arranged on the spraying pipe; wherein each spray header is evenly distributed on the spray pipe, and the spray headers face downwards.
7. The laboratory waste gas treatment integrated device according to claim 6, wherein a first packing layer and a second packing layer are arranged in the spraying treatment section, and the spraying pipe is positioned between the first packing layer and the second packing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110590662.9A CN113230882A (en) | 2021-05-28 | 2021-05-28 | Integrative equipment of laboratory exhaust-gas treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110590662.9A CN113230882A (en) | 2021-05-28 | 2021-05-28 | Integrative equipment of laboratory exhaust-gas treatment |
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| Publication Number | Publication Date |
|---|---|
| CN113230882A true CN113230882A (en) | 2021-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110590662.9A Withdrawn CN113230882A (en) | 2021-05-28 | 2021-05-28 | Integrative equipment of laboratory exhaust-gas treatment |
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| CN (1) | CN113230882A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113713562A (en) * | 2021-09-16 | 2021-11-30 | 四川大学 | Integrated box-type malodorous gas advanced treatment device and method |
-
2021
- 2021-05-28 CN CN202110590662.9A patent/CN113230882A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113713562A (en) * | 2021-09-16 | 2021-11-30 | 四川大学 | Integrated box-type malodorous gas advanced treatment device and method |
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Application publication date: 20210810 |