CN115006965A - Organic waste gas treatment system and treatment process thereof - Google Patents
Organic waste gas treatment system and treatment process thereof Download PDFInfo
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- CN115006965A CN115006965A CN202210694751.2A CN202210694751A CN115006965A CN 115006965 A CN115006965 A CN 115006965A CN 202210694751 A CN202210694751 A CN 202210694751A CN 115006965 A CN115006965 A CN 115006965A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01D53/002—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 by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01D53/14—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 by absorption
- B01D53/1487—Removing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B01D53/26—Drying gases or vapours
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- 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
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- Oil, Petroleum & Natural Gas (AREA)
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- Treating Waste Gases (AREA)
Abstract
The invention discloses an organic waste gas treatment system and a treatment process thereof, wherein the organic waste gas treatment system comprises a solvent tank, a spray tower communicated with the solvent tank through a liquid feeding pipeline, a first condenser connected to the liquid feeding pipeline, a gas-liquid separation assembly connected to the gas outlet of the spray tower through a pipeline, and a second condenser connected to the gas outlet of the gas-liquid separation assembly through a pipeline, wherein the liquid outlet of the gas-liquid separation assembly is communicated with the solvent tank through a pipeline; the first condenser and the second condenser are respectively connected with a water chilling unit and a water returning chilling unit to form a circulating passage of condensed water; organic waste gas is subjected to adsorption treatment in the spray tower through solvent spraying, and the solvent is subjected to cryogenic treatment through the condenser, so that the solvent reaches the optimal adsorption state, meanwhile, gas after adsorption treatment is subjected to gas-liquid separation operation of the gas-liquid separator and cryogenic treatment of the second condenser, liquid mixed in the gas is reliably separated, reliable discharge standards are reached, and the treatment effect is good.
Description
Technical Field
The invention relates to the technical field of organic waste gas treatment, in particular to an organic waste gas treatment system and a treatment process thereof.
Background
The waste gas generated in the medicament production process of pharmaceutical and chemical enterprises is more, the influence on the air quality is serious, the existing waste gas treatment mainly adopts activated carbon adsorption, and organic waste gas is conveyed to an adsorption bed, so that the organic waste gas is purified, however, the activated carbon adsorption is only suitable for treating the waste gas with large air volume and low concentration, the reliable treatment effect cannot be achieved for the waste gas with high concentration and low air volume, and meanwhile, the activated carbon cannot ensure the reliable adsorption and purification capability under the humid condition.
Disclosure of Invention
The invention aims to provide an organic waste gas treatment system and a treatment process thereof, which aim to solve the problem of poor organic waste gas treatment effect in the prior art.
The technical scheme for solving the technical problems is as follows: an organic waste gas treatment system comprises a solvent tank, a spray tower communicated with the solvent tank through a liquid feeding pipeline, a first condenser connected to the liquid feeding pipeline, a gas-liquid separation assembly connected to the gas outlet of the spray tower through a pipeline, and a second condenser connected to the gas outlet of the gas-liquid separation assembly through a pipeline, wherein the liquid outlet of the gas-liquid separation assembly is communicated with the solvent tank through a pipeline; the first condenser and the second condenser are respectively connected with a water chilling unit and a water returning chilling unit to form a circulating passage of condensed water.
The bottom of the spray tower is provided with a liquid outlet which is communicated with the solvent tank through a return pipe, the gas outlet is positioned at the top of the spray tower, and the gas inlet is positioned at the lower part of the spray tower.
Further, the spray tower comprises a tower body, a gas phase distributor arranged at the lower end in the tower body, a spray assembly arranged at the upper end in the tower body and a filler assembly positioned between the gas phase distributor and the spray assembly; the lower part of tower body is provided with the air inlet, and the top of tower body is provided with the gas outlet, and the air inlet is located the lower position department of gas phase distributor, and spray assembly communicates with the solvent case through sending liquid pipeline.
Furthermore, the packing assembly comprises a plurality of groups of packing layers which are sequentially arranged in the tower body from bottom to top, the adjacent packing layers are arranged at intervals, gaps for spraying liquid and waste gas to pass through are formed in the packing layers, and the gaps between the adjacent packing layers are correspondingly communicated.
Further, the packing layer includes a plurality of buckled plates and a plurality of extension board, and the buckled plate sets up with the extension board is adjacent, and is formed with between buckled plate and the extension board the clearance.
Further, the spray assembly comprises a main spray pipe, spray branch pipes which are arranged at the positions of the liquid outlets of the main spray pipe and are of tree structures, and spray nozzles arranged on the spray branch pipes, wherein the end parts of the main spray pipe, which are far away from the spray branch pipes, are connected onto the liquid outlets of the solvent box, and the area of the area surrounded by the end surfaces of the spray branch pipes is matched with the circumferential area of the tower body.
Further, the gas-liquid separation subassembly includes vapour and liquid separator and the vacuum buffer tank of establishing ties with vapour and liquid separator, and vapour and liquid separator's top is provided with the gas vent, vapour and liquid separator's bottom is provided with the liquid outlet, and the second condenser passes through the exit end of pipe connection at vacuum buffer tank.
Further, a vacuum pump is arranged between the second condenser and the vacuum buffer tank.
Furthermore, the solvent tank comprises a first solvent tank and a second solvent tank communicated with the first solvent tank, the return pipe is connected to the liquid inlet of the first solvent tank, and the pipeline at the liquid outlet of the gas-liquid separator is connected to the liquid inlet of the second solvent tank.
Furthermore, a liquid level meter is arranged on the solvent tank, and a flow meter and a thermometer are respectively arranged on the liquid conveying pipeline.
The invention also provides a treatment process of the organic waste gas, which comprises the following steps:
s1: starting a suction pump to convey the solvent in the solvent tank to a spray assembly of a spray tower after the solvent is condensed by a first condenser, and simultaneously introducing waste gas into the spray tower;
s2: liquid formed after the adsorption treatment of the spray tower flows back into the solvent tank through a return pipe, and gas is conveyed into a gas-liquid separator for primary gas-liquid separation;
s3: conveying the gas subjected to gas-liquid separation into a vacuum buffer tank for buffer vacuum treatment, and conveying the gas to a second condenser under the action of a vacuum pump;
s4: and carrying out cryogenic separation on the gas by a second condenser, and discharging after reaching the standard.
The invention has the following beneficial effects: according to the organic waste gas treatment system and the treatment process thereof, the organic waste gas is subjected to adsorption treatment in the spray tower through solvent spraying, and the solvent is subjected to cryogenic treatment through the condenser, so that the solvent reaches the optimal adsorption state, gas can be uniformly distributed in the tower body through the gas phase distributor, the waste gas is upward to form waste gas countercurrent and adsorb the waste gas through the filler, meanwhile, the spraying liquid can be mixed with the waste gas in a gap and adsorbed on the filler component, the waste gas treatment effect is improved, after the waste gas reaches the spraying component, the contact surface area of the waste gas and the mist-state liquid in the tower body is increased through setting the spray nozzle and the spraying pipeline structure, so that the spraying liquid and the waste gas can be in full contact, the spraying effect is improved, and the waste gas treatment effect and efficiency are improved;
meanwhile, the gas after adsorption treatment is subjected to gas-liquid separation operation of a gas-liquid separator and cryogenic treatment of a second condenser, so that liquid mixed in the gas is reliably separated, and the reliable discharge standard is achieved. In addition, in the waste gas treatment process, residual liquid after the solvent in the spray tower adsorbs the waste gas and liquid after separation in the gas-liquid separator can flow back to the dissolving tank, so that recycling is completed, the cost of enterprises is greatly saved, and the economic benefit is good.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the spray tower of the present invention;
FIG. 3 is a schematic view of the structure of the packing layer in the present invention;
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, an organic waste gas treatment system comprises a solvent tank 1, a spray tower 2 communicated with the solvent tank 1 through a liquid feeding pipeline, a first condenser 3 connected to the liquid feeding pipeline, a gas-liquid separation assembly 4 connected to an air outlet of the spray tower 2 through a pipeline, and a second condenser 5 connected to an air outlet of the gas-liquid separation assembly 4 through a pipeline, wherein the liquid outlet of the gas-liquid separation assembly 4 is communicated with the solvent tank 1 through a pipeline; the first condenser 3 and the second condenser 5 are respectively connected with a water chilling unit 6 and a water chilling unit 7 to form a circulation passage of condensed water. The spray tower 2 is used for carrying out adsorption operation on the organic waste gas, and the organic waste gas enters through a gas inlet at the lower part of the spray tower 2. The first condenser 3 is used for carrying out cryogenic treatment on the solvent sent into the spray tower 2 from the solvent tank 1 so as to enable the solvent to reach an optimal adsorption state, and the solvent adopts DMF (dimethyl formamide) adsorbent. The gas-liquid separation component 4 is used for separating liquid in the adsorbed gas, and the separated gas is subjected to cryogenic treatment through the second condenser 5 and is discharged after reaching the standard. The first condenser 3 and the second condenser 5 are respectively connected with a water chilling unit 6 and a water chilling unit 7 to form a circulation path of condensed water, a solvent entering the condensers is subjected to deep cooling treatment through water cooling circulation, and the cold water is circulated and reciprocated, so that a reliable condensation effect is achieved, and the cost is saved.
The bottom of the spray tower 2 is provided with a liquid outlet which is communicated with the solvent tank 1 through a return pipe 8, the gas outlet is positioned at the top end of the spray tower 2, and the gas inlet is positioned at the lower part of the spray tower 2. In the waste gas treatment process, residual liquid after the solvent in the spray tower 2 adsorbs waste gas and liquid after separation in the gas-liquid separator 40 can flow back to the dissolving tank, so that recycling is completed, the cost of enterprises is greatly saved, and the economic benefit is good.
As shown in fig. 2, the spray tower 2 includes a tower body 20, a gas phase distributor 21 disposed at a lower end inside the tower body 20, a spray assembly 22 disposed at an upper end inside the tower body 20, and a packing assembly 23 located between the gas phase distributor 21 and the spray assembly 22; the lower part of the tower body 20 is provided with an air inlet, the top of the tower body 20 is provided with an air outlet, the air inlet is positioned at the lower position of the gas phase distributor 21, and the spraying assembly 22 is communicated with the solvent tank 1 through a liquid conveying pipeline. The waste gas enters through the gas inlet, then passes through the gas phase distributor 21, the packing assembly 23 and the spraying assembly 22 in sequence for treatment, and finally is discharged through the gas outlet. In this process, make gas can evenly distributed in tower body 20 through gas phase distributor 21, waste gas makes progress, form waste gas countercurrent and adsorb waste gas through packing, it can waste gas mix in clearance 231 to spray liquid simultaneously, adsorb on filler component 23, improve the exhaust-gas treatment effect, reach behind the spray assembly 22 when waste gas, through setting for shower nozzle 222 and spraying the pipeline structure, increase the contact surface area of the inside waste gas of tower body 20 and fog-state liquid, make the contact that spray liquid and waste gas can be abundant, improve and spray the effect, improve exhaust-gas treatment effect and efficiency.
As shown in fig. 3, the packing assembly 23 includes a plurality of groups of packing layers 230 sequentially arranged in the tower body 20 from bottom to top, the adjacent packing layers 230 are arranged at intervals, gaps 231 through which the spraying liquid and the exhaust gas pass are formed on the packing layers 230, and the gaps 231 between the adjacent packing layers 230 are correspondingly communicated. Packing layer 230 includes a plurality of corrugated plates 232 and a plurality of struts 233, with corrugated plates 232 and struts 233 being disposed adjacent to each other and with gaps 231 formed between corrugated plates 232 and struts 233. This clearance 231 corresponds the intercommunication with gas phase distributor 21's export, flows out the back when waste gas is flowed by gas phase distributor 21, enters into packing layer 230, adsorbs through packing layer 230 on the one hand, and on the other hand sprays subassembly 22 spray liquid runner clearance 231 after, fully contacts with the waste gas of upwards flowing in clearance 231, reaches the treatment effect to waste gas to form the dual treatment effect of adsorbing and spraying liquid processing in the packing layer 230.
The spraying assembly 22 comprises a main spraying pipe 220, branch spraying pipes 221 which are arranged at the liquid outlet of the main spraying pipe 220 and are in a tree structure, and spray heads 222 arranged on the branch spraying pipes 221, wherein the end part of the main spraying pipe 220, which is far away from the branch spraying pipes 221, is connected to the liquid outlet of the solvent tank 1, and the area of a region defined by the end surfaces of the branch spraying pipes 221 is matched with the circumferential area of the tower body 20. The number of the spraying branch pipes is installed according to actual use requirements, so that 360-degree spraying without dead angles is realized. The preferred distribution of the spray branch pipes and the spray heads 222 is an upper-lower two-layer structure, the upper layer is 3 spray heads 222, the lower layer is 2 spray heads 222, the upper-lower two layers are installed in a staggered manner, and the spray branch pipes 221 are distributed so that the sprayed mist liquid can cover the circumferential surface of the whole tower body 20. The spray head 222 is a spiral nozzle or a wide-angle nozzle that converts liquid spray liquid into mist spray liquid. The spray head 222 and the spray branch pipe 221 are connected in a detachable mode through threads, so that the spray head 222 is convenient to replace, disassemble and assemble, and the convenience and convenience in operation are improved.
The gas-liquid separation assembly 4 comprises a gas-liquid separator 40 and a vacuum buffer tank 41 connected with the gas-liquid separator 40 in series, an exhaust port is arranged at the top end of the gas-liquid separator 40, a liquid outlet is arranged at the bottom end of the gas-liquid separator 40, the second condenser 5 is connected to the outlet end of the vacuum buffer tank 41 through a pipeline, and a vacuum pump 43 is arranged between the second condenser 5 and the vacuum buffer tank 41. The gas after the adsorption treatment is subjected to gas-liquid separation operation of the gas-liquid separator 40 and cryogenic treatment of the second condenser 5, so that liquid mixed in the gas is reliably separated, and reliable discharge standards are achieved.
The solvent tank 1 comprises a first solvent tank 1 and a second solvent tank 1 communicated with the first solvent tank 1, the return pipe 8 is connected to a liquid inlet of the first solvent tank 1, and a pipeline at a liquid outlet of the gas-liquid separator 40 is connected to a liquid inlet of the second solvent tank 1. The solvent tank 1 is provided with a liquid level meter, and the liquid conveying pipeline is respectively provided with a flow meter and a thermometer.
The invention also provides a treatment process of the organic waste gas, which comprises the following steps:
s1: starting a suction pump to convey the solvent in the solvent tank 1 to a spray component 22 of a spray tower 2 after the solvent is condensed by a first condenser 3, and simultaneously introducing waste gas into the spray tower 2;
s2: liquid formed after the adsorption treatment of the spray tower 2 flows back into the solvent tank 1 through a return pipe 8, and gas is conveyed into a gas-liquid separator 40 for primary gas-liquid separation;
s3: the gas after gas-liquid separation is conveyed into a vacuum buffer tank 41 for buffer vacuum treatment, and then conveyed to a second condenser 5 under the action of a vacuum pump 43;
s4: the gas is subjected to cryogenic separation by the second condenser 5 and is discharged after reaching the standard.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An organic waste gas treatment system is characterized by comprising a solvent tank (1), a spray tower (2) communicated with the solvent tank (1) through a liquid feeding pipeline, a first condenser (3) connected to the liquid feeding pipeline, a gas-liquid separation component (4) connected to the gas outlet of the spray tower (2) through a pipeline, and a second condenser (5) connected to the gas outlet of the gas-liquid separation component (4) through a pipeline, wherein the liquid outlet of the gas-liquid separation component (4) is communicated with the solvent tank (1) through a pipeline; the first condenser (3) and the second condenser (5) are respectively connected with a water chilling unit (6) and a water chilling unit (7) to form a circulating passage of condensed water;
the bottom of spray column (2) is provided with the liquid outlet, the liquid outlet is linked together with solvent case (1) through back flow (8), the gas outlet is located the top of spray column (2), the lower part of spray column (2) is provided with the air inlet.
2. The organic waste gas treatment system according to claim 1, wherein the spray tower (2) comprises a tower body (20), a gas phase distributor (21) disposed at a lower end inside the tower body (20), a spray assembly (22) disposed at an upper end inside the tower body (20), and a packing assembly (23) located between the gas phase distributor (21) and the spray assembly (22); the lower part of tower body (20) is provided with the air inlet, the top of tower body (20) is provided with the gas outlet, just the air inlet is located the below position department of gas phase distributor (21), spray assembly (22) are linked together through sending liquid pipeline and solvent case (1).
3. The organic waste gas treatment system according to claim 2, wherein the packing assembly (23) comprises a plurality of groups of packing layers (230) which are sequentially arranged in the tower body (20) from bottom to top, the adjacent packing layers (230) are arranged at intervals, gaps (231) through which the spraying liquid and the waste gas pass are formed in the packing layers (230), and the gaps (231) between the adjacent packing layers (230) are correspondingly communicated.
4. The organic exhaust gas treatment system according to claim 3, wherein the filler layer (230) comprises a plurality of corrugated plates (232) and a plurality of struts (233), the corrugated plates (232) and the struts (233) being disposed adjacent to each other, and the gaps (231) being formed between the corrugated plates (232) and the struts (233).
5. The organic waste gas treatment system according to claim 2, wherein the spray assembly (22) comprises a main spray pipe (220), branch spray pipes (221) which are arranged at the liquid outlet of the main spray pipe (220) and have a tree structure, and spray heads (222) arranged on the branch spray pipes (221), wherein the end of the main spray pipe (220) far away from the branch spray pipes (221) is connected to the liquid outlet of the solvent tank (1), and the area of the area enclosed by the end faces of the branch spray pipes (221) is adapted to the circumferential area of the tower body (20).
6. The organic waste gas treatment system according to claim 1, wherein the gas-liquid separation module (4) comprises a gas-liquid separator (40) and a vacuum buffer tank (41) connected in series with the gas-liquid separator (40), the top end of the gas-liquid separator (40) is provided with the exhaust port, the bottom end of the gas-liquid separator (40) is provided with a liquid outlet port, and the second condenser (5) is connected to an outlet end of the vacuum buffer tank (41) through a pipeline.
7. The organic waste gas treatment system according to claim 6, wherein a vacuum pump (43) is provided between the second condenser (5) and the vacuum buffer tank (41).
8. The organic waste gas treatment system according to claim 6, wherein the solvent tank (1) comprises a first solvent tank (10) and a second solvent tank (11) communicated with the first solvent tank (10), the return pipe (8) is connected to an inlet of the first solvent tank (10), and a pipeline at an outlet of the gas-liquid separator (40) is connected to an inlet of the second solvent tank (11).
9. The organic waste gas treatment system according to any one of claims 1 to 8, wherein a liquid level meter is provided on the solvent tank (1), and a flow meter and a temperature meter are provided on the liquid feeding pipe, respectively.
10. A process for treating an organic waste gas, which comprises the steps of using the system for treating an organic waste gas according to any one of claims 1 to 9:
s1: starting a suction pump to convey the solvent in the solvent tank (1) to a spray assembly (22) of a spray tower (2) after the solvent is condensed by a first condenser (3), and simultaneously introducing waste gas into the spray tower (2);
s2: liquid formed after the adsorption treatment of the spray tower (2) flows back into the solvent tank (1) through a return pipe (8), and gas is conveyed into a gas-liquid separator (40) for primary gas-liquid separation;
s3: the gas after gas-liquid separation is conveyed into a vacuum buffer tank (41) for buffer vacuum treatment, and then conveyed to a second condenser (5) under the action of a vacuum pump (43);
s4: the gas is subjected to cryogenic separation by a second condenser (5) and is discharged after reaching the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210694751.2A CN115006965A (en) | 2022-06-20 | 2022-06-20 | Organic waste gas treatment system and treatment process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210694751.2A CN115006965A (en) | 2022-06-20 | 2022-06-20 | Organic waste gas treatment system and treatment process thereof |
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| CN115006965A true CN115006965A (en) | 2022-09-06 |
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| CN202210694751.2A Pending CN115006965A (en) | 2022-06-20 | 2022-06-20 | Organic waste gas treatment system and treatment process thereof |
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| CN214345551U (en) * | 2021-01-20 | 2021-10-08 | 铁岭金铎科技股份有限公司 | Vegetable oil soap angle acidizing sewage treatment pond waste gas purification tower |
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| CN204564160U (en) * | 2015-04-16 | 2015-08-19 | 刘裕秋 | Butt strip formula ceramic regulation ripple packing |
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