CN216619338U - Choline production tail gas recycle device - Google Patents
Choline production tail gas recycle device Download PDFInfo
- Publication number
- CN216619338U CN216619338U CN202123385685.0U CN202123385685U CN216619338U CN 216619338 U CN216619338 U CN 216619338U CN 202123385685 U CN202123385685 U CN 202123385685U CN 216619338 U CN216619338 U CN 216619338U
- Authority
- CN
- China
- Prior art keywords
- tail gas
- nitrogen
- pipeline
- storage tank
- ethylene oxide
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
Abstract
The utility model relates to the technical field of chemical production, in particular to a choline chloride production tail gas recycling device. The device comprises a reaction kettle and a tail gas storage tank, wherein a feed inlet is formed in the side part of the reaction kettle, a tail gas discharge port is formed in the top of the reaction kettle, a tail gas inlet and a tail gas vent are formed in the side part of the tail gas storage tank, the tail gas discharge port is connected with the tail gas inlet through a pipeline, an electric cut-off valve is arranged on the pipeline connecting the tail gas discharge port with the tail gas inlet, and the tail gas vent is connected with the feed inlet of the reaction kettle through a pipeline; the top of the tail gas storage tank is provided with a nitrogen gas exhaust port which is connected with the online ethylene oxide detector through a pipeline, and a nitrogen discharge valve is arranged on the pipeline connecting the nitrogen gas exhaust port with the online ethylene oxide detector; the tail gas storage tank is provided with a nitrogen supplementing mechanism. The method can recover the toxic tail gas of the ethylene oxide generated in the reaction, and the recovered toxic tail gas is used as a raw material to participate in the reaction, thereby saving raw material resources.
Description
Technical Field
The utility model relates to the technical field of chemical production, in particular to a choline chloride production tail gas recycling device.
Background
Choline chloride is used as an important chemical raw material and is often used as an animal feed additive, a plant photosynthesis promoter and the synthesis of vitamin b medicines. Currently, choline chloride is produced by reacting trimethylamine with hydrochloric acid to prepare an aqueous solution of trimethylamine hydrochloride, and then introducing ethylene oxide into the aqueous solution of trimethylamine hydrochloride to perform a condensation reaction to generate choline chloride. In the condensation reaction process, in order to ensure the reaction rate, the reaction is normally promoted by introducing excess ethylene oxide. As is well known, ethylene oxide is a highly toxic carcinogen and a class a fire hazard substance, and is used to avoid the release of excess ethylene oxide into the atmosphere, which causes environmental and safety risks. The conventional treatment method utilizes the characteristic that ethylene oxide is very soluble in water, takes water as a solvent, and adopts a spraying absorption method to treat reaction tail gas and then discharge the reaction tail gas at high altitude. The method has the problems that the water with saturated adsorption is high-concentration organic wastewater, the biodegradability is poor, the biotoxicity is realized, and the biochemical treatment is difficult. Furthermore, the absorbed ethylene oxide which is disposed of cannot be reused, resulting in waste of raw materials.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of toxicity of ethylene oxide tail gas, resource waste and the like in the prior art, the utility model provides the device for recycling the tail gas in the choline chloride production, which can recycle the toxic ethylene oxide tail gas generated in the reaction and take part in the reaction as a raw material after recycling, thereby saving the raw material resource.
The utility model provides a choline chloride production tail gas recycling device which comprises a reaction kettle and a tail gas storage tank, wherein a feed inlet is formed in the side part of the reaction kettle, a tail gas discharge outlet is formed in the top of the reaction kettle, a tail gas inlet and a tail gas vent are formed in the side part of the tail gas storage tank, the tail gas discharge outlet is connected with the tail gas inlet through a pipeline, an electric cut-off valve is arranged on a pipeline connecting the tail gas discharge outlet and the tail gas inlet, and the tail gas vent is connected with the feed inlet of the reaction kettle through a pipeline; the top of the tail gas storage tank is provided with a nitrogen gas exhaust port which is connected with the online ethylene oxide detector through a pipeline, and a nitrogen discharge valve is arranged on the pipeline connecting the nitrogen gas exhaust port with the online ethylene oxide detector; the tail gas storage tank is provided with a nitrogen supplementing mechanism, and the nitrogen input pipe end of the nitrogen supplementing mechanism is connected with the top of the tail gas storage tank.
Furthermore, the nitrogen gas supplementing mechanism comprises a nitrogen gas buffer tank, the nitrogen gas buffer tank is connected with a nitrogen gas inlet arranged at the top of the tail gas storage tank through a pipeline, nitrogen gas is buffered and stored in the nitrogen gas buffer tank, and the nitrogen gas enters from the top of the tail gas storage tank through the pipeline under the pressure of the nitrogen gas.
Furthermore, a nitrogen pressure regulating valve is arranged on a pipeline connecting the nitrogen buffer tank and the nitrogen inlet, so that the pressure and the flow rate of the nitrogen entering can be conveniently regulated.
Furthermore, the nitrogen buffer tank is connected with a nitrogen supply device through a pipeline, and the nitrogen supply device is a nitrogen tank.
Further, online ethylene oxide detector passes through the circuit and the coupling of electronic trip valve, and when online ethylene oxide detector detected that the escape gas has ethylene oxide, with signal transmission to electronic trip valve, the electronic trip valve is closed, prevents that tail gas from continuing to escape.
Furthermore, a check valve is arranged on a connecting pipeline between the tail gas discharge port and the tail gas inlet to prevent the stored tail gas from flowing backwards.
The utility model has the beneficial effects that:
(1) the utility model can introduce the ethylene oxide generated by condensation reaction in the reaction kettle into the tail gas storage tank for storage, thereby solving the technical problem that the ethylene oxide is toxic and needs to be sprayed and treated in the prior art;
(2) the utility model can lead the ethylene oxide tail gas stored in the tail gas storage tank back to the reaction kettle again to participate in the reaction as the raw material, thereby realizing the reutilization of the tail gas and saving resources;
(3) the utility model utilizes nitrogen to seal the tail gas storage tank to prevent the escape of the ethylene oxide, when the tail gas in the tank increases, the gas in the tank gradually flows out of the nitrogen release valve, the online ethylene oxide detector can detect the escaped gas, and when the escaped gas contains the ethylene oxide, the electric cut-off valve is closed to prevent the escape of the ethylene oxide.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
In the figure, 1-a reaction kettle, 2-a tail gas storage tank, 3-a nitrogen buffer tank, 4-a nitrogen pressure regulating valve, 5-a nitrogen discharge valve, 6-an online ethylene oxide detector, 7-an electric shut-off valve, 8-a check valve, 9-a feed inlet, 10-a tail gas vent, 11-a tail gas vent, 12-a tail gas inlet, 13-a nitrogen inlet and 14-a nitrogen vent.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. 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, the device for recycling the tail gas in the choline chloride production comprises a reaction kettle 1 and a tail gas storage tank 2, wherein a feed inlet 9 is arranged on the side part of the reaction kettle 1, a tail gas discharge port 11 is arranged at the top part of the reaction kettle 1, a tail gas inlet 12 and a tail gas discharge port 10 are arranged on the side part of the tail gas storage tank 2, the tail gas discharge port 11 is connected with the tail gas inlet 12 through a pipeline, an electric shut-off valve 7 is arranged on a pipeline connecting the tail gas discharge port 11 and the tail gas inlet 12, and the tail gas discharge port 10 is connected with the feed inlet 9 arranged on the side part of the reaction kettle 1 through a pipeline; the top of the tail gas storage tank 2 is provided with a nitrogen gas exhaust port 14, the nitrogen gas exhaust port 14 is connected with the online ethylene oxide detector 6 through a pipeline, and a nitrogen release valve 5 is arranged on a pipeline connecting the nitrogen gas exhaust port 14 with the online ethylene oxide detector 6; the tail gas storage tank 2 is provided with a nitrogen supplementing mechanism, and the nitrogen input pipe end of the nitrogen supplementing mechanism is connected with the top of the tail gas storage tank 2.
The nitrogen gas supplementary mechanism includes nitrogen buffer tank 3, and nitrogen buffer tank 3 passes through the nitrogen gas entry 13 that 2 tops of pipe connection tail gas holder set up. A nitrogen pressure regulating valve 4 is arranged on a pipeline connecting the nitrogen buffer tank 3 and the nitrogen inlet 13. The nitrogen buffer tank 3 is connected with a nitrogen supply device through a pipeline, and the nitrogen supply device is a nitrogen tank.
The online ethylene oxide detector 6 is coupled with the electric cut-off valve 7 through a circuit, when the online ethylene oxide detector detects that the escaped gas has ethylene oxide, the signal is transmitted to the electric cut-off valve, and the electric cut-off valve is closed to prevent the tail gas from continuously escaping.
And a check valve 8 is also arranged on a connecting pipeline of the tail gas discharge port 11 and the tail gas inlet port 12.
The working process of the utility model is as follows:
the condensation reaction is carried out in the reaction kettle 1, excessive ethylene oxide gas enters the bottom of the tail gas storage tank 2 from the reaction kettle 1 through a pipeline in the reaction process, and the ethylene oxide gas has high relative density and is deposited at the bottom of the tail gas storage tank 2. The nitrogen is introduced into the tail gas storage tank 2 through the nitrogen supplementing mechanism, the pressure of the tail gas storage tank 2 is gradually increased along with the entering of the ethylene oxide, and when the pressure exceeds 5kpa, the nitrogen at the upper part of the tail gas storage tank 2 enters an online ethylene oxide detector 6 (an EO online detector is commercially available) through a nitrogen discharge valve 5 and is discharged into the atmosphere. When online ethylene oxide detector 6 detects that ethylene oxide reveals in letting out nitrogen valve 5, manual or self-closing electric cut-off valve 7 stops admitting air in to tail gas holding vessel 2, guarantees that the pressure in tail gas holding vessel 2 is invariable, avoids ethylene oxide to reveal in the atmosphere, causes environmental pollution. Tail gas holding vessel 2 is equipped with nitrogen gas complementary unit, ensures that the ethylene oxide in tail gas holding vessel 2 is in the nitrogen atmosphere of pressure-fired, guarantees the security of storing. When the next condensation reaction starts, the valve is opened, the ethylene oxide stored in the tail gas storage tank 2 enters the reaction kettle 1 to carry out condensation reaction, and the stored ethylene oxide is gradually consumed. Nitrogen passes through the nitrogen buffer tank 3, is decompressed to 4.5+0.2kpa through the nitrogen pressure regulating valve, and is continuously supplemented into the tail gas storage tank 2, so that the micro-positive pressure state and the nitrogen atmosphere of the tail gas storage tank 2 are maintained, and the smooth discharge of ethylene oxide and the safety in the storage process are ensured.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions should be within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure and the scope of the present invention.
Claims (6)
1. A choline chloride production tail gas recycling device is characterized by comprising a reaction kettle and a tail gas storage tank, wherein a feed inlet is formed in the side part of the reaction kettle, a tail gas discharge port is formed in the top of the reaction kettle, a tail gas inlet and a tail gas vent are formed in the side part of the tail gas storage tank, the tail gas discharge port is connected with the tail gas inlet through a pipeline, an electric cut-off valve is arranged on a pipeline connecting the tail gas discharge port with the tail gas inlet, and the tail gas vent is connected with the feed inlet of the reaction kettle through a pipeline; the top of the tail gas storage tank is provided with a nitrogen gas exhaust port which is connected with the online ethylene oxide detector through a pipeline, and a nitrogen discharge valve is arranged on the pipeline connecting the nitrogen gas exhaust port with the online ethylene oxide detector; the tail gas storage tank is provided with a nitrogen supplementing mechanism, and the nitrogen input pipe end of the nitrogen supplementing mechanism is connected with the top of the tail gas storage tank.
2. The choline chloride production tail gas recycling device of claim 1, wherein the nitrogen supplementing mechanism comprises a nitrogen buffer tank, and the nitrogen buffer tank is connected with a nitrogen inlet arranged at the top of the tail gas storage tank through a pipeline.
3. The choline chloride production tail gas recycling device of claim 2, wherein a nitrogen pressure regulating valve is arranged on a pipeline connecting the nitrogen buffer tank and the nitrogen inlet.
4. The choline chloride production tail gas recycling device according to claim 2 or 3, wherein the nitrogen buffer tank is connected with a nitrogen supply device through a pipeline, and the nitrogen supply device is a nitrogen tank.
5. The choline chloride production tail gas recycling device of claim 1, wherein the online ethylene oxide detector is coupled with the electric shut-off valve through a circuit.
6. The apparatus for recycling tail gas from choline chloride production according to claim 1, wherein a check valve is further disposed on a connecting pipeline between the tail gas discharge port and the tail gas inlet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123385685.0U CN216619338U (en) | 2021-12-29 | 2021-12-29 | Choline production tail gas recycle device |
| PCT/CN2022/000036 WO2023123525A1 (en) | 2021-12-29 | 2022-03-08 | Device for recycling tail gas from choline chloride production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123385685.0U CN216619338U (en) | 2021-12-29 | 2021-12-29 | Choline production tail gas recycle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216619338U true CN216619338U (en) | 2022-05-27 |
Family
ID=81685926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123385685.0U Active CN216619338U (en) | 2021-12-29 | 2021-12-29 | Choline production tail gas recycle device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN216619338U (en) |
| WO (1) | WO2023123525A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691333B (en) * | 2009-10-21 | 2012-07-25 | 山东恩贝科技有限公司 | Production technology for choline chloride |
| CN202048361U (en) * | 2011-04-02 | 2011-11-23 | 南通新邦化工科技有限公司 | Nitrogen protection device of atmospheric storage tank |
| CN203363663U (en) * | 2013-06-20 | 2013-12-25 | 江阴江化微电子材料股份有限公司 | Nitrogen pressure control system for chemical storage tank |
| CN104370000A (en) * | 2014-11-04 | 2015-02-25 | 中国石油化工股份有限公司 | Safe and environment-friendly method for protecting storage tanks |
| CN104848033A (en) * | 2015-05-29 | 2015-08-19 | 中国石油化工股份有限公司 | Alkane storage tank protection method |
| JP6091681B1 (en) * | 2016-03-31 | 2017-03-08 | 大阪瓦斯株式会社 | Pressure fluctuation adsorption gas production equipment |
| WO2021055074A1 (en) * | 2019-09-20 | 2021-03-25 | Exxonmobil Upstream Research Company | Removal of acid gases from a gas stream, with o2 enrichment for acid gas capture and sequestration |
-
2021
- 2021-12-29 CN CN202123385685.0U patent/CN216619338U/en active Active
-
2022
- 2022-03-08 WO PCT/CN2022/000036 patent/WO2023123525A1/en unknown
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| Publication number | Publication date |
|---|---|
| WO2023123525A1 (en) | 2023-07-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220907 Address after: 272117 No. 66 North Station West Road, Yanzhou District, Jining, Shandong. Patentee after: SHANDONG TIANCHENG CHEMICAL Co.,Ltd. Address before: 272100 No. 66, Beizhan West Road, Yanzhou District, Jining City, Shandong Province Patentee before: Shandong Tiancheng Wanfeng Investment Co.,Ltd. |
|
| TR01 | Transfer of patent right |