CN112090223A - Zero-emission organic solvent recovery system - Google Patents
Zero-emission organic solvent recovery system Download PDFInfo
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- CN112090223A CN112090223A CN202010713769.3A CN202010713769A CN112090223A CN 112090223 A CN112090223 A CN 112090223A CN 202010713769 A CN202010713769 A CN 202010713769A CN 112090223 A CN112090223 A CN 112090223A
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- adsorption tower
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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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- Chemical & Material Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a zero-emission organic solvent recovery system, which comprises the following steps of S1: conveying the VOC waste gas into a first adsorption tower through a conveying pipe, wherein the resin in the first adsorption tower adsorbs impurities in the waste gas; s2: switching to a second adsorption tower for adsorption after the first adsorption tower adsorbs for a certain time; s3: when the second adsorption tower starts to adsorb, the first fan starts to work at the same time, and gas which is not dissolved in the resin is conveyed into the incinerator through the connecting pipe; s4: and meanwhile, the resin is conveyed into a first condenser, the solution dissolved in the resin is condensed by first refrigerating fluid in the first condenser, and the condensed resin is conveyed into a second condenser. The method thoroughly treats the organic solvent in the waste gas, does not generate any waste water, thereby achieving the aim of protecting the environment, and completely recycles the solvent in the VOC waste gas after the organic solvent in the waste gas is treated, thereby recycling the solvent again, enabling the material to be reused and reducing the waste of resources.
Description
Technical Field
The invention relates to the technical field of organic solvent recovery, in particular to a zero-emission organic solvent recovery system.
Background
The VOC refers to an active volatile organic compound, namely a volatile organic compound which can generate harm, after the organic solvent is used, the organic solvent can form a mixture with various impurities, solutes and the like, and the mixture is heated to volatilize the organic solvent in the mixture; and then the volatilized organic solvent is condensed and collected, so that the organic solvent with higher purity can be obtained again, and the organic solvent can be conveniently reused.
In actual industrial production, a plurality of organic solvents with different boiling points are generally used at the same time, the recovery treatment is carried out by using the existing organic solvent recovery system, but in actual industrial production, some solvents are always incompletely treated, and the gases are released into the air, so that the air is polluted as usual after long-time use, the environment is polluted, and the improvement is needed.
Disclosure of Invention
The invention aims to solve the defects that the organic matters in VOC can not be completely treated and discharged into the air to still pollute the environment when the organic matters in VOC are removed at present, and provides a zero-emission organic solvent recovery system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a zero-emission organic solvent recovery system comprising the steps of:
s1: conveying the VOC waste gas into a first adsorption tower through a conveying pipe, wherein the resin in the first adsorption tower adsorbs impurities in the waste gas;
s2: switching to a second adsorption tower for adsorption after the first adsorption tower adsorbs for a certain time;
s3: when the second adsorption tower starts to adsorb, the first fan starts to work at the same time, and gas which is not dissolved in the resin is conveyed into the incinerator through the connecting pipe;
s4: meanwhile, the resin is conveyed into a first condenser, the solution dissolved in the resin is condensed by first refrigerating fluid in the first condenser, and the condensed solution is conveyed into a second condenser;
s5: conveying a second refrigerating fluid in a second condenser, condensing the solution again by using refrigerated water, and conveying the solution into a collecting tank after condensation is finished;
s6: and the second fan is turned on, the gas which is not condensed in the first condenser is heated by the heater, the temperature of the gas is conveyed to the first adsorption tower again, the gas is dissolved in the resin again, and the gas is circulated again and condensed again;
and after the desorption of the S7 first adsorption tower is finished, the desorption of the second adsorption tower is started, and the gas is recycled, so that the waste gas is completely recovered.
Preferably, the VOC waste gas conveying capacity is 1200m3/h。
Preferably, the first condenser refrigerating fluid is water, and the flow rate of the water is 40T/h.
Preferably, the refrigerating fluid of the second condenser is chilled water with the temperature of-15 ℃ and the flow rate is 8T/h.
Preferably, a gas sampling opening and a flame arrester are arranged on the connecting pipe.
Preferably, a manual air inlet is arranged on the conveying pipe.
Preferably, the first condenser is connected with a dehydrator.
Preferably, the heater delivers saturated steam, the temperature of which is at 110-.
Compared with the prior art, the invention has the beneficial effects that: the system thoroughly treats the organic solvent in the waste gas without generating any waste water, thereby achieving the purpose of protecting the environment, completely recycling the solvent in the VOC waste gas after the organic solvent in the waste gas is treated, recycling the solvent again, reusing the material and reducing the waste of resources.
Drawings
Fig. 1 is a schematic structural diagram of a zero-emission organic solvent recovery system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a zero-emission organic solvent recovery system includes the following steps:
s1: VOC waste gas is conveyed into a first adsorption tower through a conveying pipe, a manual gas inlet is arranged on the conveying pipe, when the concentration of the waste gas in the gas exceeds the standard, the manual gas inlet is opened, the gas is conveyed into the first adsorption tower or a second adsorption tower, impurities in the waste gas are adsorbed by resin in the first adsorption tower, and organic matters in the VOC can be adsorbed by the resin;
s2: after the first adsorption tower adsorbs for a certain time, the adsorption tower is switched to the second adsorption tower for adsorption, the first adsorption tower and the second adsorption tower can be alternately replaced for use, the output of the treated waste gas is increased, and the VOC waste gas conveying capacity is 1200m3/h；
S3: when the second adsorption tower starts to adsorb, the first fan starts to work at the same time, gas which is not dissolved in resin is conveyed into the incinerator through the connecting pipe, the gas is combusted, the floating gas is thoroughly and cleanly treated, the gas sampling port and the flame arrester are arranged on the connecting pipe, and the flame arrester prevents fire smoke in the incinerator from combusting gas in the pipeline;
s4: meanwhile, the resin is conveyed into a first condenser, first refrigerating fluid passes through the first condenser, the refrigerating fluid of the first condenser is water, the flow rate of the water is 40T/h, the solution dissolved in the resin is condensed, and the condensed solution is conveyed to a second condenser;
s5: conveying a second refrigerating fluid in a second condenser, wherein the refrigerating fluid of the second condenser is-15 ℃ refrigerating water, the temperature of the-15 ℃ refrigerating water is lower, the flow rate is 8T/h, the refrigerating water condenses the solution again, the solution is conveyed into a collecting tank after the condensation is finished, and the collecting tank collects the condensed liquid for recycling;
s6: and the second fan is turned on, the gas which is not condensed in the first condenser is heated by the heater, the temperature of the gas is raised and then the gas is conveyed to the first adsorption tower, saturated steam is conveyed in the heater, the temperature of the saturated steam is at 110-;
and after the desorption of the S7 first adsorption tower is finished, the second adsorption tower starts to desorb for recycling, so that the waste gas is completely recycled, and the gas leakage is prevented from polluting and affecting the surrounding environment.
According to the invention, VOC waste gas is conveyed into a first adsorption tower through a conveying pipe, a manual gas inlet is arranged on the conveying pipe, when the concentration of the waste gas in the gas exceeds the standard, the manual gas inlet is opened, the gas is conveyed into the first adsorption tower or a second adsorption tower, impurities in the waste gas are adsorbed by resin in the first adsorption tower, organic matters in the VOC can be adsorbed by the resin, after the first adsorption tower is adsorbed for a certain time, the adsorption tower is switched into the second adsorption tower for adsorption, the first adsorption tower and the second adsorption tower can be alternately replaced for use, the output of the treated waste gas is increased, and the conveying capacity of the VOC waste gas is 1200m3The second adsorption tower starts to adsorb, the first fan starts to work simultaneously, gas which is not dissolved in resin is conveyed into the incinerator through the connecting pipe to burn the gas, floating gas is guaranteed to be treated completely, the gas sampling port and the flame arrester are installed on the connecting pipe, the flame arrester prevents fire smoke in the incinerator from burning the gas in the pipeline, meanwhile, the resin is conveyed into the first condenser, first refrigerating fluid passes through the first condenser, the refrigerating fluid of the first condenser is water, the flow rate of the water is 40T/h, the solution dissolved in the resin is condensed, the condensed solution is conveyed into the second condenser, second refrigerating fluid is conveyed into the second condenser, the refrigerating fluid of the second condenser is-15 ℃ refrigerating fluid, the temperature of the refrigerating fluid of-15 ℃ is lower, the flow rate is 8T/h, the refrigerating fluid condenses the solution again, after the condensation is finished, the condensed liquid is conveyed into a collecting tank, the collecting tank collects the condensed liquid for recycling, a second fan is opened, the gas after the condensation is not finished in a first condenser is conveyed into a first adsorption tower again by a heater, the temperature of the gas is increased by the heater, saturated steam is conveyed into the heater, the temperature of the saturated steam is at 110-,affecting the surrounding environment.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A zero-emission organic solvent recovery system is characterized by comprising the following steps:
s1: conveying the VOC waste gas into a first adsorption tower through a conveying pipe, wherein the resin in the first adsorption tower adsorbs the solvent in the waste gas;
s2: switching to a second adsorption tower for adsorption after the first adsorption tower adsorbs for a certain time;
s3: when the second adsorption tower starts to adsorb, the first fan starts to work at the same time, and gas which is not dissolved in the resin is conveyed into the incinerator through the connecting pipe;
s4: meanwhile, the solvent and the air which are changed into gas after the resin is heated by the hot air are conveyed to a first condenser, the solution dissolved in the desorption gas is condensed in the first condenser through first refrigerating fluid, and the solution is conveyed to a second condenser after the condensation is finished;
s5: conveying a second refrigerating fluid in a second condenser, condensing the solution again by using refrigerated water, and conveying the solution into a collecting tank after condensation is finished;
s6: the second fan is turned on, the gas condensed in the first condenser is heated by the heater, the temperature of the gas is raised and the gas is conveyed to the first adsorption tower again, the hot gas evaporates the solvent dissolved in the resin again, and the solvent is circulated and condensed again;
and after the desorption of the S7 first adsorption tower is finished, the desorption of the second adsorption tower is started, and the solvent in the waste gas is recycled, so that the solvent in the waste gas is completely recovered.
2. The system of claim 1, wherein the VOC flue gas is delivered in a quantity sufficient to effect zero emission organic solvent recoveryIs 1200m3/h。
3. The system of claim 1, wherein the first condenser cooling fluid is water, and the flow rate of the water is 40T/h.
4. The zero-emission organic solvent recovery system of claim 1, wherein the freezing liquid of the second condenser is-15 ℃ freezing water, and the flow rate is 8T/h.
5. The system of claim 1, wherein the first condenser is connected to a dehydrator.
6. The system as claimed in claim 1, wherein the heater is used to deliver saturated steam, and the temperature of the saturated steam is 110-150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713769.3A CN112090223A (en) | 2020-07-22 | 2020-07-22 | Zero-emission organic solvent recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713769.3A CN112090223A (en) | 2020-07-22 | 2020-07-22 | Zero-emission organic solvent recovery system |
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| CN112090223A true CN112090223A (en) | 2020-12-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426945A (en) * | 1994-02-04 | 1995-06-27 | Jordan Holding Company | Process and apparatus for recovering vapor |
| CN103691254A (en) * | 2013-12-10 | 2014-04-02 | 武汉旭日华科技发展有限公司 | Method for reducing energy consumption of wet-process organic solvent recovering device |
| CN106540508A (en) * | 2016-12-27 | 2017-03-29 | 上海新阳半导体材料股份有限公司 | Reclaim the device and method of volatility organic chloride gas |
| CN106902617A (en) * | 2017-03-17 | 2017-06-30 | 河北科技大学 | A kind of high concentration VOC air purifying recovering apparatus and method |
| CN208727105U (en) * | 2018-07-10 | 2019-04-12 | 杭州星华反光材料股份有限公司 | A kind of solvent recovery adds RTO combined type exhaust treatment system |
-
2020
- 2020-07-22 CN CN202010713769.3A patent/CN112090223A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5426945A (en) * | 1994-02-04 | 1995-06-27 | Jordan Holding Company | Process and apparatus for recovering vapor |
| CN103691254A (en) * | 2013-12-10 | 2014-04-02 | 武汉旭日华科技发展有限公司 | Method for reducing energy consumption of wet-process organic solvent recovering device |
| CN106540508A (en) * | 2016-12-27 | 2017-03-29 | 上海新阳半导体材料股份有限公司 | Reclaim the device and method of volatility organic chloride gas |
| CN106902617A (en) * | 2017-03-17 | 2017-06-30 | 河北科技大学 | A kind of high concentration VOC air purifying recovering apparatus and method |
| CN208727105U (en) * | 2018-07-10 | 2019-04-12 | 杭州星华反光材料股份有限公司 | A kind of solvent recovery adds RTO combined type exhaust treatment system |
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Application publication date: 20201218 |