CN214400307U - Product recovery system used in trimethyl orthoacetate production process - Google Patents

Abstract

The utility model relates to a product recovery system for among trimethyl orthoacetate production process, a serial communication port, including alcoholysis tail gas pipeline, centrifugation tail gas pipeline, mother liquor tail gas pipeline and the tail gas recovery house steward that communicates with above-mentioned four pipelines, the output of tail gas recovery house steward is connected to first recovery condenser and second recovery condenser in proper order, and the gaseous phase export of second recovery condenser links to each other with follow-up tail gas treatment process via intermediate pipeline and the first draught fan of installing on intermediate pipeline; liquid phase outlets at the lower parts of the first recovery condenser and the second recovery condenser are respectively connected into a coarse product receiving tank through a recovery pipeline, and the coarse product receiving tank is communicated to a rectification system through a coarse product conveying pipeline. The utility model discloses effectively reduce the waste of product in the tail gas, alleviateed the environmental protection pressure, energy saving and consumption reduction effect is showing.

Description

Product recovery system used in trimethyl orthoacetate production process

Technical Field

The utility model relates to a product recovery system, especially a product recovery system that is arranged in trimethyl orthoacetate production process belongs to chemical production equipment technical field.

Background

In the trimethyl orthoacetate production process, a certain amount of organic tail gas generated by a production system is not subjected to targeted recovery treatment at present, but is only collected and directly enters an organic tail gas main pipe, and then is discharged after being treated by the tail gas. Because the partial tail gas contains partial trimethyl orthoacetate products, the direct discharge not only brings great pressure to environmental protection, but also causes product waste for production enterprises. In addition, for the treatment of the organic tail gas, condensation and adsorption treatment are mainly adopted at present, but in practice, the replacement of the activated carbon is frequent, and the adsorption treatment effect is not ideal.

Disclosure of Invention

The utility model aims at providing a product recovery system for among trimethyl orthoacetate production process, product recovery system matches in the front end of trimethyl orthoacetate organic tail gas treatment process, carries out recovery processing to trimethyl orthoacetate in the organic tail gas that trimethyl orthoacetate production produced to reduce the product extravagant, improve the product yield, improve the tail gas treatment effect simultaneously, alleviate the environmental protection pressure.

In order to solve the above problems, the utility model adopts the following technical scheme:

the product recovery system is used in the trimethyl orthoacetate production process and is characterized by being matched at the front end of a trimethyl orthoacetate tail gas treatment process and used for carrying out recovery treatment on organic tail gas generated in a production system, the system comprises an alcoholysis tail gas pipeline, a centrifugal tail gas pipeline, a mother liquid tail gas pipeline and a product tail gas pipeline which are respectively arranged on an alcoholysis kettle, a centrifugal machine system, a mother liquid tank and a product tank, and a tail gas recovery main pipe which is respectively communicated with the tail gas pipelines and used for collecting the tail gas, the tail gas recovery main pipe outputs and is sequentially connected to a first recovery condenser and a second recovery condenser, and a gas phase outlet of the second recovery condenser is connected with a subsequent tail gas treatment process through an intermediate pipeline and a first induced draft fan arranged on the intermediate pipeline; liquid phase outlets at the lower parts of the first recovery condenser and the second recovery condenser are respectively connected into a coarse product receiving tank through a recovery pipeline, and the coarse product receiving tank is communicated to a rectification system through a coarse product conveying pipeline.

The tail gas treatment system comprises a first-stage condenser and a second-stage condenser which are communicated with a tail gas treatment pipeline, and UI photolysis equipment, an active carbon adsorption device and RTO waste gas treatment equipment which are sequentially communicated with the second-stage condenser through the tail gas treatment pipeline.

The one-level condenser links to each other with the tail gas treatment pipeline via the inlet end, and its end of giving vent to anger links to each other with the inlet end of second grade condenser via the tail gas treatment pipeline, the end of giving vent to anger of second grade condenser inserts UI photolysis equipment via the tail gas treatment pipeline, the end of giving vent to anger of UI photolysis equipment inserts active carbon adsorption device via tail gas treatment pipeline and second draught fan.

The activated carbon adsorption device comprises two groups of parallel activated carbon adsorption tanks, wherein the two parallel activated carbon adsorption tanks are converged to a tail gas treatment pipeline through respective gas outlet ends, and are finally connected to RTO waste gas treatment equipment through the tail gas treatment pipeline.

Liquid outlets at the bottoms of the first-stage condenser and the second-stage condenser are converged into a receiving tank below through a liquid outlet pipeline, and the receiving tank is communicated with a byproduct tank.

The utility model discloses a product recovery system for among trimethyl orthoacetate production process, collect the pipeline and synthesize the recovery processing with its total tail gas that collects through laying tail gas in trimethyl orthoacetate production system, in recovery system, mainly adopt the condenser to take out the liquid that contains the product, then send this liquid into rectification system and carry out the rectification purification, from this with the product reuse system that contains in the organic tail gas, and tail gas after the recovery processing carries out tail gas treatment again, the operating pressure of tail gas treatment system has been alleviateed, and in the middle of organic tail gas treatment system, collect the condensation, photocatalysis, adsorb and incineration disposal in an organic whole, the maximize improves tail gas treatment efficiency and treatment degree, alleviate the environmental protection pressure.

Drawings

FIG. 1: a schematic diagram of a product recovery system for use in a trimethyl orthoacetate production process;

in the figure, 10, a tail gas treatment pipeline, 11, a primary condenser, 12, a secondary condenser, 13, UI photolysis equipment, 14, an activated carbon adsorption device, 15, RTO waste gas treatment equipment, 16, a receiving tank, 21, a first recovery condenser, 22, a second recovery condenser, 22a, an intermediate pipeline, 31, an alcoholysis kettle, 32, a centrifuge system, 33, a mother liquor tank, 34, a product tank, 35, a tail gas recovery header pipe, 4, a product receiving tank, 4a, a crude product conveying pipeline, 5, a rectification system, 6a, a first induced draft fan, 6b and a second induced draft fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

The system comprises an alcoholysis tail gas pipeline, a centrifugal tail gas pipeline, a mother liquor tail gas pipeline and a product tail gas pipeline which are respectively arranged on an alcoholysis kettle 31, a centrifuge system 32, a mother liquor tank 33 and a product tank 34, wherein the four pipelines are converged and communicated to a tail gas recovery header pipe 35 and are output through the tail gas recovery header pipe 35 and are sequentially connected to a first recovery condenser 21 and a second recovery condenser 22, the lower parts of the first recovery condenser 21 and the second recovery condenser 22 are respectively connected into a crude product receiving tank 4 through recovery pipelines, and the crude product receiving tank 4 is communicated to a rectification system 5 through a crude product conveying pipeline 4 a. The gas phase outlet of the second recovery condenser 22 transmits the recovered organic tail gas to a tail gas treatment system through an intermediate pipeline 22a and a first induced draft fan 6a installed on the intermediate pipeline 22a, and the organic tail gas enters a subsequent tail gas treatment process. The tail gas treatment system comprises a first-stage condenser 11 and a second-stage condenser 12 which are communicated with a tail gas treatment pipeline 10, and a UI photolysis device 13, an active carbon adsorption device 14 and an RTO waste gas treatment device 15 which are communicated with the second-stage condenser 12 through the tail gas treatment pipeline 10 in sequence. First-level condenser 11 links to each other with tail gas treatment pipeline 10 via the inlet end, and it gives vent to anger the end and links to each other with the inlet end of second grade condenser 12 via tail gas treatment pipeline 10, the end of giving vent to anger of second grade condenser 12 inserts UI photolysis equipment 13 via tail gas treatment pipeline 10 and second draught fan 6b access active carbon adsorption device 14, active carbon adsorption device 14 includes two sets of parallel active carbon adsorption tanks, and two parallel active carbon adsorption tanks are given vent to anger respectively and are held to collect tail gas treatment pipeline 10, finally insert to RTO exhaust-gas treatment equipment 15 by tail gas treatment pipeline 10. Liquid outlets at the bottoms of the primary condenser 11 and the secondary condenser 12 of the tail gas treatment system are converged into a receiving tank 16 below through a liquid outlet pipeline and finally sent into a byproduct tank.

The product recovery system for the trimethyl orthoacetate production process of the embodiment has the following design principle and operation process:

and (3) recovery treatment: alcoholysis kettle 31, centrifuge system 32, mother liquor tank 33 and product tank 34 collect tail gas recovery house steward 35 via alcoholysis tail gas pipeline, centrifugation tail gas pipeline, mother liquor tail gas pipeline and product tail gas pipeline respectively, enter first grade recovery condenser 21, second grade recovery condenser 22 through tail gas recovery house steward 35 and carry out condensation treatment, the liquid that contains the product after condensation treatment enters coarse product receiving tank 4 below via recovery pipeline respectively, and then send the liquid that contains the product to rectification system 5 via coarse product conveying pipeline 4a and carry out the rectification purification.

Tail gas treatment: the recovered organic tail gas sequentially enters a first-stage condenser 11 and a second-stage condenser 12 through a tail gas treatment pipeline 10 to be subjected to two-stage condensation treatment, and liquid generated by condensation enters a receiving tank 14 through liquid outlet pipelines of the condensers respectively and is finally sent to a byproduct tank to be sold as an organic byproduct. The organic tail gas after condensation treatment enters the UI photolysis equipment 13 through the tail gas treatment pipeline 10, the tail gas after photocatalytic treatment inside the UI photolysis equipment 13 is sent into the activated carbon adsorption device 14 through the fan, the tail gas after activated carbon adsorption treatment finally enters the RTO waste gas treatment equipment 15 for incineration treatment, and the tail gas after treatment can reach the standard and be discharged.

The product recovery system for trimethyl orthoacetate production process of this embodiment, through laying tail gas collection pipeline and carrying out comprehensive recovery processing with its total tail gas that converges in trimethyl orthoacetate production system, in recovery system, mainly adopt the condenser to bring out the liquid that contains the product, then send this liquid into the rectification system and carry out the rectification purification, the product that contains in the organic tail gas is used for the system again from this, and tail gas after recovery processing carries out tail gas treatment again, tail gas treatment system's operating pressure has been alleviateed, and in the middle of organic tail gas treatment system, collect condensation, photocatalysis, absorption and incineration disposal in an organic whole, the maximize improves tail gas treatment efficiency and treatment degree, alleviate the environmental protection pressure.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The product recovery system is used in the production process of trimethyl orthoacetate, and is characterized by comprising an alcoholysis tail gas pipeline, a centrifugal tail gas pipeline, a mother liquor tail gas pipeline, a product tail gas pipeline and a tail gas recovery header pipe, wherein the alcoholysis tail gas pipeline, the centrifugal tail gas pipeline, the mother liquor tail gas pipeline and the product tail gas pipeline are respectively arranged on an alcoholysis kettle, a centrifugal machine system, a mother liquor tank and a product tank, the tail gas recovery header pipe is respectively communicated with the tail gas pipelines and is used for collecting tail gas, the tail gas recovery header pipe outputs and is sequentially connected to a first recovery condenser and a second recovery condenser, and a gas phase outlet of the second recovery condenser is connected with a subsequent tail gas treatment process through a middle pipeline and a first induced draft fan arranged on the middle pipeline; liquid phase outlets at the lower parts of the first recovery condenser and the second recovery condenser are respectively connected into a coarse product receiving tank through a recovery pipeline, and the coarse product receiving tank is communicated to a rectification system through a coarse product conveying pipeline.

2. The product recovery system for a trimethyl orthoacetate production process of claim 1,

the tail gas treatment system comprises a first-stage condenser and a second-stage condenser which are communicated with a tail gas treatment pipeline, and UI photolysis equipment, an active carbon adsorption device and RTO waste gas treatment equipment which are sequentially communicated with the second-stage condenser through the tail gas treatment pipeline.

3. The product recovery system for a trimethyl orthoacetate production process of claim 2,

the one-level condenser links to each other with the tail gas treatment pipeline via the inlet end, and its end of giving vent to anger links to each other with the inlet end of second grade condenser via the tail gas treatment pipeline, the end of giving vent to anger of second grade condenser inserts UI photolysis equipment via the tail gas treatment pipeline, the end of giving vent to anger of UI photolysis equipment inserts active carbon adsorption device via tail gas treatment pipeline and second draught fan.

4. The product recovery system for a trimethyl orthoacetate production process of claim 3,

the activated carbon adsorption device comprises two groups of parallel activated carbon adsorption tanks, wherein the two parallel activated carbon adsorption tanks are converged to a tail gas treatment pipeline through respective gas outlet ends, and are finally connected to RTO waste gas treatment equipment through the tail gas treatment pipeline.

5. The product recovery system for a trimethyl orthoacetate production process of claim 2,

liquid outlets at the bottoms of the first-stage condenser and the second-stage condenser are converged into a receiving tank below through a liquid outlet pipeline, and the receiving tank is communicated with a byproduct tank.

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