CN217247965U

CN217247965U - Tail gas recovery device for propionyl chloride production

Info

Publication number: CN217247965U
Application number: CN202123399986.9U
Authority: CN
Inventors: 段明发; 韩秀杰; 王金波; 韩晓辉
Original assignee: Liaocheng Kairui Chemical Co ltd
Current assignee: Liaocheng Kairui Chemical Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-08-23
Anticipated expiration: 2031-12-30

Abstract

The utility model provides a tail gas recovery unit is used in propionyl chloride production relates to chemical industry equipment technical field, get rid of the jar including impurity, the side that the jar was got rid of to impurity is equipped with the production jar, the bottom of production jar is equipped with fourth communicating pipe, keeps away from the tip of the fourth communicating pipe of production jar is equipped with the liquid reserve tank, and the tip of fourth communicating pipe is located the inside of liquid reserve tank, the inside of liquid reserve tank is equipped with the liquid suction pipe, and the one end of liquid suction pipe runs through impurity and gets rid of tank surface and extend to inside, and the other end of liquid suction pipe runs through the top surface of liquid reserve tank. Adopt impurity to get rid of the jar, get rid of jar inside through fourth communicating pipe and liquid suction pipe to impurity in the liquid of the propionyl chloride of production to spray through the second nozzle, join in marriage the shower in the liquid case at the in-process cooperation that sprays, spray through the first nozzle on the shower, the two mutual reaction can get rid of local impurity in the propionyl chloride, distills again, can improve the effect of tail gas recovery.

Description

Tail gas recovery device for propionyl chloride production

Technical Field

The utility model relates to a chemical industry equipment technical field especially relates to propionyl chloride is tail gas recovery unit for production.

Background

Propionyl chloride is colorless to light yellow transparent liquid, has pungent smell, is dissolved in water and ethanol, is violently decomposed, is mixed with ether, and is used as an introducing agent for organic synthesis to obtain a propionating agent and propionic anhydride; as raw materials for perfumes and medicines; obtaining a raw material of a pesticide herbicide; polymerizing the initiator to obtain the raw material. The propionic acid is used as a raw material and reacts at 45 ℃ under the action of phosphorus trichloride (or thionyl chloride).

Chinese patent No. CN201720952620.4 discloses a chlorinated propionyl chloride tail gas recovery device, including acylation reaction device, acylation distillation device, chlorination reaction device, chlorination distillation device and hydrochloric acid absorbing device, acylation reaction device and acylation distillation device are parallelly connected, chlorination reaction device and chlorination distillation device are parallelly connected, hydrochloric acid absorbing device includes the hydrochloric acid absorption tank, one-level hydrochloric acid absorption tank and second grade hydrochloric acid absorption tank, acylation reaction device and acylation distillation device link to each other with the hydrochloric acid absorption tank respectively, chlorination reaction device and chlorination distillation device link to each other with one-level hydrochloric acid absorption tank respectively, one-level hydrochloric acid absorption tank is connected with second grade hydrochloric acid absorption tank. The device makes final hydrogen chloride gas become relatively pure hydrochloric acid aqueous solution after water absorption, can effectively reduce the consumption of other products hydrochloric acid and solve the problem of difficult treatment of hydrochloric acid recovered from the chloro-propionyl chloride product.

At present, tail gas of each step of reaction and distillation of the chloro-propionyl chloride is recycled and treated uniformly, and the main component of the recycled materials is hydrochloric acid, but the recycled materials contain a large amount of organic impurities, including chloro-propionyl chloride, propionic acid, propionyl chloride and the like. The defects are obvious: the product yield is low; ② the recovered hydrochloric acid has more impurities, can not be recycled and is difficult to treat. This is mainly due to the poor separation of the materials caused by the insufficient condensation effect. Gases exist in the processes of acylation reaction, chlorination reaction, acylation distillation and chlorination distillation of the chloropropionyl chloride, organic gases need to be condensed and recovered, the existing mixed condenser causes the recovery rate of the organic gases to be insufficient, the organic gases enter a hydrochloric acid absorption tank to become organic impurities, the treatment of partial hydrochloric acid is difficult, in addition, the consumption of the organic gases causes high reaction raw material consumption and reduced finished product yield, and the gas recovery is influenced due to higher distillation temperature before the recovery.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a tail gas recovery device for propionyl chloride production.

In order to achieve the above purpose, the utility model adopts the following technical scheme: propionyl chlorine production is with tail gas recovery unit, get rid of the jar including impurity, the side that the jar was got rid of to impurity is equipped with the production jar, the bottom of production jar is equipped with fourth communicating pipe, keeps away from the tip of the fourth communicating pipe of production jar is equipped with the liquid reserve tank, and the tip of fourth communicating pipe is located the inside of liquid reserve tank, the inside of liquid reserve tank is equipped with the liquid suction pipe, and the one end of liquid suction pipe runs through impurity and gets rid of tank surface and extend to inside, and the other end of liquid suction pipe runs through the top surface of liquid reserve tank.

Preferably, the side of the liquid storage tank is provided with a liquid distribution tank, a spray pipe is arranged between the liquid distribution tank and the impurity removal tank, and the spray pipe penetrates through the surface of the impurity removal tank and extends to the inside.

Preferably, shower and liquid suction pipe are located the inside that the jar was got rid of to impurity, and the shower is located the liquid suction pipe directly over, the bottom of shower is equipped with first nozzle, the liquid suction pipe top surface is equipped with the second nozzle, and first nozzle and second nozzle are respectively through threaded connection on the surface of shower and liquid suction pipe.

Preferably, the side of the impurity removing tank is provided with a distillation tank, a third communicating pipe is arranged between the distillation tank and the impurity removing tank, and the distillation tank and the impurity removing tank are communicated with each other through the third communicating pipe.

Preferably, the side of distillation retort is equipped with the cooling tank, be equipped with first communicating pipe between distillation retort and the cooling tank, and communicate through first communicating pipe between distillation retort and the cooling tank.

Preferably, inside fixed mounting of cooling tank has two baffles, be equipped with the runner pipe between the baffle, and the both ends of runner pipe all run through the baffle, the inside of cooling tank is equipped with the drinking-water pipe, the bottom of drinking-water pipe is equipped with the water tank, and the drinking-water pipe runs through the water tank top surface and extends to inside.

Preferably, the side of cooling tank is equipped with the tail gas and retrieves the jar, be equipped with second communicating pipe between cooling tank and the tail gas recovery jar, and communicate through second communicating pipe between cooling tank and the tail gas recovery jar.

Preferably, the tail gas recovery tank, the cooling tank, the distillation tank, the impurity removal tank and the production tank are all located on the same horizontal plane, and the tail gas recovery tank, the cooling tank, the distillation tank, the impurity removal tank and the production tank are communicated.

Advantageous effects

The utility model discloses in, adopt impurity to get rid of jar, get rid of jar inside through fourth communicating pipe and liquid suction pipe to impurity in the liquid of the propionyl chloride of production to spray through the second nozzle, join in marriage the shower in the liquid case at the in-process cooperation that sprays, spray through the first nozzle on the shower, the two mutual reaction can get rid of local impurity in the propionyl chloride, distill again, can improve the effect of tail gas recovery.

The utility model discloses in, adopt the cooling tank, pass through the cooling tank with the gas after distilling, the runner pipe in the cooling tank can all have the flow of cooling water in the outside of runner pipe through the gas after distilling, and the cooling water is through drawing water of drinking-water pipe, can guarantee that the gas after distilling cools down when the runner pipe to can improve the recovery quality of tail gas.

Drawings

FIG. 1 is an isometric view of a tail gas recovery unit for the production of propionyl chloride;

FIG. 2 is a top view of a tail gas recovery unit for propionyl chloride production;

FIG. 3 is a side view of a tail gas recovery unit for propionyl chloride production;

fig. 4 is a sectional view of the recovery apparatus of the off-gas for propionyl chloride production.

Illustration of the drawings:

1. a production tank; 2. an impurity removal tank; 3. a distillation tank; 4. a first communication pipe; 5. a cooling tank; 6. a second communicating pipe; 7. a tail gas recovery tank; 8. a water pumping pipe; 9. a water tank; 10. a third communicating pipe; 11. a liquid distribution box; 12. a liquid storage tank; 13. a fourth communicating pipe; 14. a liquid pumping pipe; 15. a shower pipe; 16. a first nozzle; 17. a second nozzle; 18. a baffle plate; 19. and (4) a circulating pipe.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further explained below with reference to the following embodiments and the accompanying drawings, but the following embodiments are only the preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

The specific embodiment is as follows:

referring to fig. 1-4, the tail gas recovery device for propionyl chloride production comprises an impurity removal tank 2, a production tank 1 is arranged on the side surface of the impurity removal tank 2, a fourth communicating pipe 13 is arranged at the bottom of the production tank 1, a liquid storage tank 12 is arranged at the end part of the fourth communicating pipe 13 far away from the production tank 1, the end part of the fourth communicating pipe 13 is positioned inside the liquid storage tank 12, an extraction pipe 14 is arranged inside the liquid storage tank 12, one end of the extraction pipe 14 penetrates through the surface of the impurity removal tank 2 and extends to the inside, the other end of the extraction pipe 14 penetrates through the top surface of the liquid storage tank 12, a liquid distribution tank 11 is arranged on the side surface of the liquid storage tank 12, a spray pipe 15 is arranged between the liquid distribution tank 11 and the impurity removal tank 2, the spray pipe 15 penetrates through the surface of the impurity removal tank 2 and extends to the inside, the spray pipe 15 and the extraction pipe 14 are positioned inside the impurity removal tank 2, and the spray pipe 15 is positioned right above the extraction pipe 14, the bottom of the spray pipe 15 is provided with a first nozzle 16, the top surface of the liquid extracting pipe 14 is provided with a second nozzle 17, and the first nozzle 16 and the second nozzle 17 are respectively connected on the surfaces of the spray pipe 15 and the liquid extracting pipe 14 through threads.

Adopt impurity to get rid of jar 2, get rid of jar 2 inside through fourth communicating pipe 13 and liquid suction pipe 14 to impurity in the liquid of the propionyl chloride of production to spray through second nozzle 17, join in marriage the shower 15 in the liquid tank 11 at the in-process cooperation that sprays, spray through first nozzle 16 on shower 15, the two mutual reaction can get rid of local impurity in the propionyl chloride, distill again, can improve the effect of tail gas recovery.

The side of jar 2 is got rid of to impurity is equipped with retort 3, is equipped with third communicating pipe 10 between retort 3 and the jar 2 is got rid of to impurity, and retort 3 and impurity get rid of jar 2 and are intercommunication through third communicating pipe 10, and the side of retort 3 is equipped with cooling tank 5, is equipped with first communicating pipe 4 between retort 3 and the cooling tank 5, and communicates through first communicating pipe 4 between retort 3 and the cooling tank 5.

Inside fixed mounting of cooling tank 5 has two baffles 18, be equipped with runner pipe 19 between the baffle 18, and the both ends of runner pipe 19 all run through baffle 18, the inside of cooling tank 5 is equipped with drinking-water pipe 8, the bottom of drinking-water pipe 8 is equipped with water tank 9, and drinking-water pipe 8 runs through water tank 9 top surface and extends to inside, the side of cooling tank 5 is equipped with tail gas recovery jar 7, be equipped with second communicating pipe 6 between cooling tank 5 and the tail gas recovery jar 7, and through second communicating pipe 6 intercommunication between cooling tank 5 and the tail gas recovery jar 7, cooling tank 5, retort 3, jar 2 and production jar 1 are all in on same horizontal plane to the impurity is got rid of, and tail gas recovery jar 7, cooling tank 5, retort 3, intercommunication between jar 2 and the production jar 1 is got rid of to the impurity.

Adopt cooling tank 5, pass through cooling tank 5 with the gas after the distillation, runner pipe 19 in cooling tank 5 can all have the flow of cooling water in the outside of runner pipe 19 through the gas after the distillation, and the cooling water is through drawing water of drinking-water pipe 8, can guarantee that the gas after the distillation cools down when runner pipe 19 to can improve the recovery quality of tail gas.

The utility model discloses a theory of operation: the propionyl chloride produced in the liquid flows inside the liquid storage tank 12 through the fourth communication pipe 13, is pumped inside the impurity removal tank 2 through the liquid pumping pipe 14, and is sprayed through the second nozzle 17, the spraying pipe 15 in the liquid distribution box 11 is matched in the spraying process, the liquid in the liquid distribution box 11 is extracted by the spraying pipe 15 and sprayed through the first nozzle 16 on the spraying pipe 15, the two react with each other, the liquid after the reaction flows into the distillation tank 3 through the third communicating pipe 10, gas is generated by distillation, the gas after the distillation flows into the cooling tank 5 through the first communicating pipe 4, the gas after the distillation can pass through the circulating pipe 19 in the cooling tank 5, the outside of the circulation pipe 19 is provided with the flow of cooling water, the cooling water pumps water through the water pumping pipe 8, the gas after the distillation can be guaranteed to cool down when passing through the circulating pipe 19, and the cooled gas flows into the tail gas recovery tank 7 through the second communicating pipe 6.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Propionyl chlorine production is with tail gas recovery unit, get rid of jar (2) including impurity, its characterized in that: the side of the impurity removing tank (2) is provided with a production tank (1), the bottom of the production tank (1) is provided with a fourth communicating pipe (13), the end part of the fourth communicating pipe (13) far away from the production tank (1) is provided with a liquid storage tank (12), the end part of the fourth communicating pipe (13) is positioned in the liquid storage tank (12), the inside of the liquid storage tank (12) is provided with a liquid pumping pipe (14), one end of the liquid pumping pipe (14) penetrates through the surface of the impurity removing tank (2) and extends to the inside, the other end of the liquid pumping pipe (14) penetrates through the top surface of the liquid storage tank (12), the side of the liquid storage tank (12) is provided with a liquid distribution tank (11), a spray pipe (15) is arranged between the liquid distribution tank (11) and the impurity removing tank (2), the spray pipe (15) penetrates through the surface of the impurity removing tank (2) and extends to the inside, the spray pipe (15) and the liquid pumping pipe (14) are positioned in the impurity removing tank (2), and shower (15) are located liquid extraction pipe (14) directly over, the bottom of shower (15) is equipped with first nozzle (16), liquid extraction pipe (14) top surface is equipped with second nozzle (17), and first nozzle (16) and second nozzle (17) are respectively through threaded connection in the surface of shower (15) and liquid extraction pipe (14).

2. The apparatus for recovering a tail gas from propionyl chloride production according to claim 1, characterized in that: the side of the impurity removing tank (2) is provided with a distillation tank (3), a third communicating pipe (10) is arranged between the distillation tank (3) and the impurity removing tank (2), and the distillation tank (3) and the impurity removing tank (2) are communicated with each other through the third communicating pipe (10).

3. The apparatus for recovering a tail gas for propionyl chloride production according to claim 2, characterized in that: the side of distillation retort (3) is equipped with cooling tank (5), be equipped with first communicating pipe (4) between distillation retort (3) and cooling tank (5), and communicate through first communicating pipe (4) between distillation retort (3) and cooling tank (5).

4. The apparatus for recovering a tail gas for propionyl chloride production according to claim 3, characterized in that: the inside fixed mounting of cooling tank (5) has two baffles (18), be equipped with runner pipe (19) between baffle (18), and baffle (18) are all run through at the both ends of runner pipe (19), the inside of cooling tank (5) is equipped with drinking-water pipe (8), the bottom of drinking-water pipe (8) is equipped with water tank (9), and drinking-water pipe (8) run through water tank (9) top surface and extend to inside.

5. The apparatus for recovering a tail gas for propionyl chloride production according to claim 4, characterized in that: the side of cooling tank (5) is equipped with tail gas and retrieves jar (7), be equipped with second communicating pipe (6) between cooling tank (5) and tail gas recovery jar (7), and through second communicating pipe (6) intercommunication between cooling tank (5) and the tail gas recovery jar (7).

6. The apparatus for recovering a tail gas for propionyl chloride production according to claim 5, characterized in that: the tail gas recovery tank (7), the cooling tank (5), the distillation tank (3), the impurity removal tank (2) and the production tank (1) are all located on the same horizontal plane, and the tail gas recovery tank (7), the cooling tank (5), the distillation tank (3), the impurity removal tank (2) and the production tank (1) are communicated with each other.