CN114247277A - Recycling system and method for supplementing furan phenol reaction waste gas - Google Patents
Recycling system and method for supplementing furan phenol reaction waste gas Download PDFInfo
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- CN114247277A CN114247277A CN202111568834.9A CN202111568834A CN114247277A CN 114247277 A CN114247277 A CN 114247277A CN 202111568834 A CN202111568834 A CN 202111568834A CN 114247277 A CN114247277 A CN 114247277A
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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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
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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Abstract
The invention discloses a system and a method for recycling furan phenol reaction waste gas, which comprises a kettle-type reactor, wherein the kettle-type reactor is connected with a compressor and an alkaline washing tower, the compressor is connected with the alkaline washing tower, the top of the alkaline washing tower is connected with a liquid caustic feeding pump, the liquid caustic feeding pump conveys NaOH solution to the top of the alkaline washing tower, the bottom of the alkaline washing tower is connected with an alkaline washing tower extraction pump, the alkaline washing tower extraction pump is connected with a dehydration tower, the top of the dehydration tower is connected with a dehydration tower top water extraction pipe, the bottom of the dehydration tower is connected with a dehydration tower bottom extraction pump, and the dehydration tower bottom extraction pump is connected with a reboiler. The method is mature, has high automation degree and high absorption efficiency, reduces the emission of CO2 in the chemical production process, realizes the recycling of carbon resources and reduces the production cost; liquid Na2CO3Simplification of solution additionThe reaction process is simplified, the gas phase first generation is adopted, the reactor bubbler is adopted, the mixing process of the reaction is enhanced, and the stability of the reaction temperature control is improved.
Description
Technical Field
The invention relates to the field of environment-friendly energy, in particular to a system and a method for recycling furan phenol reaction waste gas.
Background
CO generated by using NaOH complementary reaction2The common chemical technology is a packed tower, sodium hydroxide solution is uniformly distributed on the surface of a packing from top to bottom through a liquid distributor, reaction waste gas containing carbon dioxide passes through the packing from bottom to top, the gas and the liquid are in full contact, and CO is generated2Is complemented and reacted to generate Na2CO3。
In the prior art, the first-generation component, CO, in the reaction waste gas is recovered by multi-stage condensation, resin adsorption and other modes2Direct discharge increases carbon emission; the separation process has complex flow, low automation degree and poor operation stability; using solid Na2CO3Solid conveying, weighing and blanking equipment and the like are added, and the problems that the solid blanking conveying process is easy to block, and the solid blanking conveying equipment is cleaned regularly exist; therefore, the recycling system and the method for the furan phenol reaction exhaust gas are provided.
Disclosure of Invention
The invention aims to provide a system and a method for recycling waste gas generated in a furan phenol complementary reaction, aiming at overcoming the defects in the prior art and solving the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cyclic utilization system of collection furan phenol reaction waste gas, includes kettle-type reactor, kettle-type reactor links to each other with compressor and alkaline washing tower, the compressor links to each other with the alkaline washing tower, the top of alkaline washing tower is connected with liquid caustic soda charge pump, the import of liquid caustic soda charge pump links to each other with the NaOH solution inlet pipe, the bottom of alkaline washing tower is connected with alkaline washing tower extraction pump, alkaline washing tower extraction pump links to each other with the dehydration tower, the top of dehydration tower is connected with dehydration tower top water extraction pipe, the bottom of dehydration tower is connected with dehydration tower bottom extraction pump, dehydration tower bottom extraction pump links to each other with the reboiler.
As a preferred technical scheme of the invention, the material extracted from the bottom of the dehydration tower is conveyed to the tank reactor through a centrifugal pump.
As a preferable technical scheme of the invention, the two tank reactors are respectively a reactor A and a reactor B, a bubbling distributor is arranged in the reactor A, the reactor A and the reactor B are connected in series, and a reaction liquid outlet is arranged at the bottom of the reactor B.
As a preferred technical scheme of the invention, the upper end enclosure of the reactor A is provided with a catechol inlet, a first generation inlet, an MOE inlet and Na2CO3And (4) adding an inlet.
As a preferable technical scheme of the invention, motors are arranged above the reactor A and the reactor B, and stirring paddles are connected to the motors.
As a preferred technical scheme of the invention, an inlet of the compressor is connected with a gas phase pipe at the top of the alkaline washing tower, an outlet of the compressor is connected with a bubbling distributor of the kettle reactor, an emptying pipeline of the kettle reactor is connected with the alkaline washing tower, and materials at the bottom of the alkaline washing tower are connected with the dehydrating tower through an alkaline washing tower extraction pump.
A method for recycling reaction waste gas of complementary furan phenol comprises the following specific steps:
s1: NaOH solution enters the system from a NaOH solution feeding pipe and is conveyed to the top of the alkaline tower through a liquid caustic feeding pump, and the NaOH solution is uniformly distributed on the surface of the filler under the action of a liquid distributor in the alkaline tower and flows from top to bottom;
s2: the waste gas generated by the kettle reactor is conveyed to the lower end of the alkaline washing tower through an emptying pipeline, and thenThe rear waste gas is fully contacted with NaOH solution in S1 to supplement and collect CO in the waste gas2Generation of Na2CO3First generation and a small amount of uncompensated CO2Entering a compressor from the tower top of the alkaline washing tower;
s3: using a compressor to convert unreacted first generation and a small amount of uncompensated CO2Compressing, and conveying to a bubbling distributor in the kettle reactor to participate in the reaction again;
s4: na from the bottom of the alkali washing tower2CO3The aqueous solution is conveyed to a dehydration tower through an alkaline washing tower extraction pump for dehydration and concentration treatment, and then the liquid at the bottom of the dehydration tower is conveyed to Na of a kettle type reactor through a tower bottom extraction pump of the dehydration tower2CO3Adding into mouth, and recycling.
The invention has the beneficial effects that: the method is mature, has high automation degree and high absorption efficiency, reduces the emission of CO2 in the chemical production process, realizes the recycling of carbon resources and reduces the production cost; the addition of the liquid Na2CO3 solution simplifies the reaction process, the use of the gas phase first generation and the reactor bubbler strengthens the mixing process of the reaction, and increases the stability of the reaction temperature control.
Drawings
FIG. 1 is a block diagram of the system of the present invention.
In the figure: 1. a kettle reactor, 2, a bubbling distributor, 3, an alkaline washing tower, 4, a liquid caustic feeding pump, 5, a compressor, 6, a dehydrating tower, 7, a bottom extraction pump of the dehydrating tower, 8, an alkaline washing tower extraction pump, 9, a catechol inlet, 10, an A inlet, 11, an MOE inlet, 12, Na2CO3The device comprises a feeding port, 13, a NaOH solution feeding pipe, 14, a dehydration tower top water extraction port, 15, a heating steam inlet, 16, a reboiler water drainage port, 17 and a reaction liquid outlet.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.
Example (b): referring to fig. 1, the present invention provides a technical solution: the utility model provides a cyclic utilization system and method of collection furan phenol reaction waste gas, including kettle-type reactor 1, kettle-type reactor 1 links to each other with compressor 5 and alkaline washing tower 3, compressor 5 links to each other with alkaline washing tower 3, the top of alkaline washing tower 3 is connected with caustic soda charge pump 4, the import of caustic soda charge pump 4 links to each other with NaOH solution inlet pipe 13, the bottom of alkaline washing tower 3 is connected with alkaline washing tower extraction pump 8, alkaline washing tower extraction pump 8 links to each other with dehydration tower 6, the top of dehydration tower 6 is connected with dehydration tower top water extraction pipe 14, the bottom of dehydration tower 6 is connected with dehydration tower bottom extraction pump 7, reboiler dehydration tower bottom extraction pump 7 links to each other with reboiler dehydration tower bottom extraction pump 7.
The reboiler is provided with a heating steam inlet 15 and a reboiler drain port 16, and the bottom of the dehydration tower 6 is conveyed to the kettle type reactor 1 through a material extracted by a centrifugal pump.
The two kettle type reactors 1 are respectively a reactor A and a reactor B, a bubbling distributor 2 is arranged in the reactor A, the reactor A and the reactor B are connected in series, and a reaction liquid outlet 17 is arranged at the bottom of the reactor B.
The upper end enclosure of the reactor A is provided with a catechol inlet 9, a first generation inlet 10, an MOE inlet 11 and Na2CO3Is added to the port 12.
Motors are arranged above the reactor A and the reactor B, and stirring paddles are connected to the motors.
The import of compressor 5 links to each other with the gas phase pipe at alkaline tower 3 top, and the export links to each other with bubble distributor 2 of kettle-type reactor 1, and kettle-type reactor 1's unloading pipeline links to each other with alkaline tower 3, and alkaline tower 3 bottom material links to each other with dehydration tower 6 through alkaline tower extraction pump 8.
A method for recycling reaction waste gas of complementary furan phenol comprises the following specific steps:
s1: NaOH solution enters the system from a NaOH solution feeding pipe 13 and is conveyed to the top of the alkaline tower 3 through a liquid caustic soda feeding pump 4, and the NaOH solution is uniformly distributed on the surface of the filler under the action of a liquid distributor in the alkaline tower 3 and flows from top to bottom;
s2: the waste gas generated by the tank reactor 1 is conveyed to the lower end of the alkaline washing tower 3 through an emptying pipeline, then the waste gas is fully contacted with the NaOH solution in S1,complement CO in exhaust gas2Generation of Na2CO3First generation and a small amount of uncompensated CO2Entering a compressor 5 from the top of the alkaline tower 3;
s3: unreacted first generation and a small amount of uncompensated CO are compressed by a compressor 52Compressing, and conveying to a bubbling distributor 2 in the kettle-type reactor 1 to participate in the reaction again;
s4: na from the bottom of the caustic tower 32CO3The aqueous solution is conveyed to a dehydration tower 6 by an alkaline tower extraction pump 8 for dehydration and concentration treatment, and then the liquid at the bottom of the dehydration tower 6 is conveyed to Na of a kettle-type reactor 1 by a dehydration tower bottom extraction pump 72CO3Is added into the inlet 12 to be recycled.
The working principle is as follows: a cyclic utilization system for supplementing furan phenol reaction waste gas comprises a kettle type reactor 1, a bubbling distributor 2, an alkaline washing tower 3, a liquid caustic feeding pump 4, a compressor 5, a dehydration tower 6, a bottom extraction pump 7 of the dehydration tower, an alkaline washing tower extraction pump 8, a catechol addition port 9, an A addition port 10, an MOE addition port 11, Na2CO3The method comprises the following steps of adding an inlet 12, an NaOH adding inlet 13, a dehydration tower top water extraction pipe 14, a heating steam inlet 15, a reboiler drain port 16 and a reaction liquid outlet 17, wherein the method for recycling the waste gas comprises the following steps: CO produced by reaction in the tank reactor 12And unreacted gas phase first generation enters the bottom of the alkaline washing tower 3 through a reaction kettle emptying pipeline, NaOH solution is used as an absorbent, the NaOH solution is uniformly distributed on the surface of the filler under the action of a liquid distributor in the alkaline washing tower 3 and flows from top to bottom, the reaction waste gas rises to contact with the filler, and CO in the waste gas is supplemented and collected2Generation of Na2CO3First generation and a small amount of uncompensated CO2A compressor 5 is fed from the top of the absorption tower, and the compressed gas is conveyed to a bubbling distributor 2 in the reaction kettle to participate in the reaction again after being compressed by the compressor 5; na at the bottom of alkali washing tower2CO3The aqueous solution enters a dehydrating tower 6 for dehydration and then returns to the reaction kettle for recycling.
The method is mature, has high automation degree and high absorption efficiency, reduces the emission of CO2 in the chemical production process, realizes the recycling of carbon resources and reduces the production cost; the addition of the liquid Na2CO3 solution simplifies the reaction process, the use of the gas phase first generation and the reactor bubbler strengthens the mixing process of the reaction, and increases the stability of the reaction temperature control.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (7)
1. The utility model provides a cyclic utilization system of complement furan phenol reaction waste gas, includes kettle-type reactor (1), its characterized in that: kettle-type reactor (1) links to each other with compressor (5) and caustic wash tower (3), compressor (5) links to each other with caustic wash tower (3), the top of caustic wash tower (3) is connected with liquid caustic soda charge pump (4), the import of liquid caustic soda charge pump (4) links to each other with NaOH solution inlet pipe (13), the bottom of caustic wash tower (3) is connected with caustic wash tower extraction pump (8), caustic wash tower extraction pump (8) links to each other with dehydration tower (6), the top of dehydration tower (6) is connected with dehydration top of the tower water extraction pipe (14), the bottom of dehydration tower (6) is connected with dehydration tower bottom of the tower extraction pump (7), dehydration tower bottom of the tower extraction pump (7) links to each other with the reboiler.
2. The recycling system of exhaust gas from furan phenol complement reaction according to claim 1, wherein: and the bottom of the dehydrating tower (6) is used for extracting materials through a centrifugal pump and conveying the materials to the kettle type reactor (1).
3. The recycling system of exhaust gas from furan phenol complement reaction according to claim 1, wherein: the reactor is characterized in that two kettle type reactors (1) are arranged and are respectively a reactor A and a reactor B, a bubbling distributor (2) is arranged inside the reactor A, the reactor A and the reactor B are connected in series, and a reaction liquid outlet (17) is formed in the bottom of the reactor B.
4. The recycling system of exhaust gas from furan phenol complement reaction according to claim 3, wherein: the upper end enclosure of the reactor A is provided with a catechol inlet (9), a first generation inlet (10), an MOE inlet (11) and Na2CO3An inlet (12).
5. The recycling system of exhaust gas from furan phenol complement reaction according to claim 3, wherein: the reactor is characterized in that motors are arranged above the reactor A and the reactor B, and stirring paddles are connected to the motors.
6. The recycling system of exhaust gas from furan phenol complement reaction according to claim 1, wherein: the inlet of the compressor (5) is connected with a gas phase pipe at the top of the alkaline washing tower (3), the outlet of the compressor is connected with the bubbling distributor (2) of the kettle type reactor (1), the emptying pipeline of the kettle type reactor (1) is connected with the alkaline washing tower (3), and materials at the bottom of the alkaline washing tower (3) are connected with the dehydration tower (6) through an alkaline washing tower extraction pump (8).
7. The method for recycling reaction exhaust gas of complementary furan phenol as claimed in claim 1, wherein: the method comprises the following specific steps:
s1: NaOH solution enters the system from a NaOH solution feeding pipe (13), and then is conveyed to the top of the alkaline tower (3) through a liquid caustic feeding pump (4), and the NaOH solution is uniformly distributed on the surface of the filler under the action of a liquid distributor in the alkaline tower (3) and flows from top to bottom;
s2: the waste gas generated by the tank reactor (1) is conveyed to the lower end of the alkaline washing tower (3) through an emptying pipeline, and then the waste gas is fully contacted with NaOH solution in S1 to supplement and collect CO in the waste gas2Generation of Na2CO3First generation and a small amount of uncompensated CO2Entering a compressor (5) from the top of the alkaline tower (3);
s3: unreacted first generation and a small amount of CO which is not complemented are generated by a compressor (5)2Compressing, and then conveying the mixture to a bubble distributor (2) in the kettle reactor (1) to participate in the reaction again;
s4: na at the bottom of the alkaline tower (3)2CO3The aqueous solution is conveyed to a dehydration tower (6) by an alkaline tower extraction pump (8) for dehydration and concentration treatment, and then the liquid at the bottom of the dehydration tower (6) is conveyed to Na of a kettle-type reactor (1) by a dehydration tower bottom extraction pump (7)2CO3Is added into the inlet (12) to recycle it.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111568834.9A CN114247277A (en) | 2021-12-21 | 2021-12-21 | Recycling system and method for supplementing furan phenol reaction waste gas |
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| CN202111568834.9A CN114247277A (en) | 2021-12-21 | 2021-12-21 | Recycling system and method for supplementing furan phenol reaction waste gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117861425A (en) * | 2024-02-04 | 2024-04-12 | 江苏三吉利化工股份有限公司 | Treatment system and method for zero emission of furan phenol etherification waste gas |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205360735U (en) * | 2016-01-06 | 2016-07-06 | 江苏三吉利化工股份有限公司 | A full -automatic continuous demineralizer for production of furan phenol |
| CN106187679A (en) * | 2016-06-29 | 2016-12-07 | 山东聊城中盛蓝瑞化工有限公司 | The recycling system and method for carbon dioxide in a kind of chlorinated hydrocabon hydrolysis tail gas |
| CN109012110A (en) * | 2018-06-28 | 2018-12-18 | 北京科技大学 | A method of carbon dioxide is trapped using sodium hydroxide and sodium carbonate |
| CN111148563A (en) * | 2018-05-19 | 2020-05-12 | 森特克有限公司 | Carbon dioxide emission reduction treatment method for combustion waste gas |
-
2021
- 2021-12-21 CN CN202111568834.9A patent/CN114247277A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205360735U (en) * | 2016-01-06 | 2016-07-06 | 江苏三吉利化工股份有限公司 | A full -automatic continuous demineralizer for production of furan phenol |
| CN106187679A (en) * | 2016-06-29 | 2016-12-07 | 山东聊城中盛蓝瑞化工有限公司 | The recycling system and method for carbon dioxide in a kind of chlorinated hydrocabon hydrolysis tail gas |
| CN111148563A (en) * | 2018-05-19 | 2020-05-12 | 森特克有限公司 | Carbon dioxide emission reduction treatment method for combustion waste gas |
| CN109012110A (en) * | 2018-06-28 | 2018-12-18 | 北京科技大学 | A method of carbon dioxide is trapped using sodium hydroxide and sodium carbonate |
Non-Patent Citations (1)
| Title |
|---|
| 魏小波等: "邻苯二酚与甲代烯丙基氯的醚化反应动力学", 《化工学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117861425A (en) * | 2024-02-04 | 2024-04-12 | 江苏三吉利化工股份有限公司 | Treatment system and method for zero emission of furan phenol etherification waste gas |
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