CN210560164U - Dry tail gas recovery unit of aminoacetic acid production - Google Patents
Dry tail gas recovery unit of aminoacetic acid production Download PDFInfo
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- CN210560164U CN210560164U CN201921392281.4U CN201921392281U CN210560164U CN 210560164 U CN210560164 U CN 210560164U CN 201921392281 U CN201921392281 U CN 201921392281U CN 210560164 U CN210560164 U CN 210560164U
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- tail gas
- aminoacetic acid
- precooler
- absorption tower
- gas absorption
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Abstract
The utility model discloses a dry tail gas recovery device for aminoacetic acid production, which comprises an aminoacetic acid drying device, and further comprises a precooler, a tail gas absorption tower, a deep cooler and a methanol recovery tank, wherein the precooler, the tail gas absorption tower and the deep cooler are sequentially connected in series, the airflow inlet of the precooler is connected with the tail gas outlet of the aminoacetic acid drying device, the airflow outlet of the precooler is connected with the airflow inlet of the tail gas absorption tower, the airflow outlet of the tail gas absorption tower is connected with the airflow inlet of the deep cooler, the liquid outlets of the precooler and the deep cooler are both connected with the methanol recovery tank, and the liquid outlet of the tail gas absorption tower is connected with an aminoacetic acid rectifying tower; in sum, the utility model has the advantages of reducing the consumption of methanol, improving the yield of aminoacetic acid and lightening the environmental pollution.
Description
Technical Field
The utility model belongs to the technical field of the clean production of chemical industry, concretely relates to dry tail gas recovery unit of aminoacetic acid production.
Background
aminoacetic acid is also called glycine, is α -amino acid with the simplest structure, has very wide application, is mainly used for pesticides, medicines, foods, feeds, preparation of other amino acids, synthesis of surfactants and the like, has various production methods, mainly comprises chloroacetic acid ammonolysis and Sterek methods, currently, the chloroacetic acid ammonolysis is adopted at home mostly, and the chloroacetic acid ammonolysis needs to adopt a large amount of methanol for extraction, crystallization and separation of aminoacetic acid, so that a centrifuged aminoacetic acid wet product also contains partial methanol with the methanol content of about 3 percent (mass fraction), and the methanol can be brought into the air along with hot air flow in the aminoacetic acid drying process, thereby not only influencing the environment, but also causing the waste of resources.
Therefore, in order to solve the above problems, it is necessary to develop a recovery device for dry tail gas from aminoacetic acid production.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a waste gas recovery device in the drying process of producing aminoacetic acid by a chloroacetic acid ammonolysis method so as to reduce the consumption of methanol, improve the yield of aminoacetic acid and reduce the environmental pollution.
The purpose of the utility model is realized like this: the utility model provides a dry tail gas recovery unit of aminoacetic acid production, includes aminoacetic acid drying device, still includes precooler, tail gas absorption tower, deep cooler and methyl alcohol recovery tank, wherein, precooler, tail gas absorption tower and deep cooler are series connection in proper order, the tail gas export of aminoacetic acid drying device is connected to the air current import of precooler, the air current import of tail gas absorption tower is connected to the air current export of precooler, the air current import of deep cooler is connected to the air current export of tail gas absorption tower, the liquid outlet of precooler and deep cooler all connects the methyl alcohol recovery tank, the liquid outlet connection aminoacetic acid rectifying column of tail gas absorption tower.
And the precooler and the deep cooler are respectively provided with a temperature controller and a flow controller.
And a forced circulation pump is arranged on the tail gas absorption tower.
And the tail gas absorption tower is also provided with a liquid level controller and an automatic water replenishing device.
And a temperature controller and a cooling jacket are arranged on the methanol recovery tank.
The recovery device also comprises a PLC controller, wherein the PLC controller is in control connection with the precooler, the deep cooler, the tail gas absorption tower and the methanol recovery tank.
The utility model has the advantages that: the utility model adopts a combined device of the precooler, the tail gas absorption tower and the deep cooler to recover the methanol in the aminoacetic acid drying tail gas, and controls the temperature of the precooler and the deep cooler to ensure that the methanol is completely cooled and recovered; the quality of final tail gas emission can be effectively controlled by controlling the temperature of the precooler and the deep cooler, controlling the liquid level of the tail gas absorption tower and controlling the temperature of the methanol receiving tank; in sum, the utility model has the advantages of reducing the consumption of methanol, improving the yield of aminoacetic acid and lightening the environmental pollution.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. precooler 2, tail gas absorption tower 3, deep cooler 4, methyl alcohol recovery tank.
Detailed Description
The technical scheme of the utility model is further explained in detail with the attached drawings.
As shown in figure 1, the recovery device for the dry tail gas in the production of aminoacetic acid comprises an aminoacetic acid drying device, and further comprises a precooler 1, a tail gas absorption tower 2, a deep cooler 3 and a methanol recovery tank 4.
The precooler 1, the tail gas absorption tower 2 and the deep cooler 3 are sequentially connected in series, dry tail gas sequentially passes through, the precooler 1 and the deep cooler 3 are vertically arranged at two sides of the tail gas absorption tower 2, the tail gas continuously enters, an airflow inlet of the precooler 1 is connected with a tail gas outlet of an aminoacetic acid drying device, an airflow outlet of the precooler 1 is connected with an airflow inlet of the tail gas absorption tower 2, an airflow outlet of the tail gas absorption tower 2 is connected with an airflow inlet of the deep cooler 3, liquid outlets of the precooler 1 and the deep cooler 3 are both connected with a methanol recovery tank 4, a liquid outlet of the tail gas absorption tower 2 is connected with an aminoacetic acid rectifying tower, and the tail gas absorption tower 2 is periodically conveyed to the aminoacetic acid rectifying tower for treatment.
All be provided with temperature controller and flow controller on precooler 1 and the deep cooler 3, guarantee that the methyl alcohol homoenergetic of tail gas in precooler 1 and deep cooler 3 cools off and retrieves, be provided with the force circulation pump on the tail gas absorption tower 2, still be provided with liquid level controller and automatic water supply device on the tail gas absorption tower 2, be provided with temperature controller and cooling jacket on the methyl alcohol recovery tank 4, guarantee that the methyl alcohol of methyl alcohol receiving tank can not escape once more.
The system also comprises a PLC controller, wherein the PLC controller is in control connection with the temperature controller and the flow controller on the precooler 1 and the deep cooler 3, and is in control connection with a forced circulation pump, a liquid level controller and an automatic water replenishing device on the tail gas absorption tower 2 and a temperature controller on the methanol recovery tank 4.
When the utility model is implemented, the tail gas outlet of the aminoacetic acid drying device is connected through the air inlet of the precooler 1, so that the dry tail gas sequentially and continuously passes through the precooler 1, the tail gas absorption tower 2 and the deep cooler 3, wherein, the liquid in the precooler 1 and the deep cooler 3 is conveyed to the methanol recovery tank 4 for recovery through the liquid outlets of the precooler 1 and the deep cooler 3, meanwhile, the temperature controller and the flow controller on the precooler 1 and the deep cooler 3 can be controlled and adjusted through the PLC controller, so as to ensure that the methanol in the tail gas in the precooler 1 and the deep cooler 3 can be cooled and recovered, the liquid level of the tail gas absorption tower 2 can be ensured to be in a constant range through the liquid level controller arranged on the tail gas absorption tower 2, the tail gas absorption tower 2 can be replenished with water through the automatic water replenishing device on the tail gas absorption tower 2, the liquid outlet of the tail gas absorption tower 2 can be periodically conveyed to the rectifying tower for treatment, through the temperature controller and the cooling jacket on the methanol recovery tank 4, the methanol in the methanol recovery tank 4 can be ensured not to escape again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The utility model provides a dry tail gas recovery unit of aminoacetic acid production, includes aminoacetic acid drying device, its characterized in that: the methanol recovery system is characterized by further comprising a precooler (1), a tail gas absorption tower (2), a deep cooler (3) and a methanol recovery tank (4), wherein the precooler (1), the tail gas absorption tower (2) and the deep cooler (3) are sequentially connected in series, a tail gas outlet of an aminoacetic acid drying device is connected with an air flow inlet of the precooler (1), an air flow outlet of the precooler (1) is connected with an air flow inlet of the tail gas absorption tower (2), an air flow outlet of the tail gas absorption tower (2) is connected with an air flow inlet of the deep cooler (3), the methanol recovery tank (4) is connected with liquid outlets of the precooler (1) and the deep cooler (3), and an aminoacetic acid rectifying tower is connected with a liquid outlet of the tail gas absorption tower (2).
2. The recovery device for the dry tail gas generated in the production of aminoacetic acid according to the claim 1 is characterized in that: and the precooler (1) and the deep cooler (3) are respectively provided with a temperature controller and a flow controller.
3. The recovery device for the dry tail gas generated in the production of aminoacetic acid according to the claim 1 is characterized in that: and a forced circulation pump is arranged on the tail gas absorption tower (2).
4. The recovery device for the dry tail gas generated in the production of aminoacetic acid according to the claim 1 is characterized in that: and the tail gas absorption tower (2) is also provided with a liquid level controller and an automatic water replenishing device.
5. The recovery device for the dry tail gas generated in the production of aminoacetic acid according to the claim 1 is characterized in that: and a temperature controller and a cooling jacket are arranged on the methanol recovery tank (4).
6. The recovery device for the dry tail gas generated in the production of aminoacetic acid according to the claim 1 is characterized in that: the system also comprises a PLC controller, wherein the PLC controller is in control connection with the precooler (1), the deep cooler (3), the tail gas absorption tower (2) and the methanol recovery tank (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921392281.4U CN210560164U (en) | 2019-08-26 | 2019-08-26 | Dry tail gas recovery unit of aminoacetic acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921392281.4U CN210560164U (en) | 2019-08-26 | 2019-08-26 | Dry tail gas recovery unit of aminoacetic acid production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210560164U true CN210560164U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921392281.4U Active CN210560164U (en) | 2019-08-26 | 2019-08-26 | Dry tail gas recovery unit of aminoacetic acid production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210560164U (en) |
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2019
- 2019-08-26 CN CN201921392281.4U patent/CN210560164U/en active Active
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