CN219174449U

CN219174449U - Acetylene cleaning and sewage recovery system

Info

Publication number: CN219174449U
Application number: CN202223564769.5U
Authority: CN
Inventors: 邓晓龙; 师文涛; 魏勇; 赵宁; 程震; 王军宁
Original assignee: Shaanxi Heimao Coking Co ltd
Current assignee: Shaanxi Heimao Coking Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-13
Anticipated expiration: 2032-12-30

Abstract

The utility model relates to the technical field of acetylene preparation processes, in particular to an acetylene cleaning and sewage recovery system, which comprises a sewage device, and a sewage collecting pipeline, a sewage collecting tank and a slag water recovery tank which are sequentially communicated with the sewage device, wherein the sewage collecting pipeline, the sewage collecting tank and the slag water recovery tank are all closed devices. The utility model sets up the airtight collection recovery unit at the back end of the apparatus blow-down unit of the clean workshop section of acetylene, return the supernatant clarified by sewage to the system and recycle, including blow-down collecting pipe, blow-down collecting tank and dreg water recovery tank communicated with blow-down unit sequentially, blow-down collecting pipe, blow-down collecting tank and dreg water recovery tank are the airtight device, avoid blow-down pipe discharge sewage, etc. into the open environment of the trench directly, have solved pollution environment such as acetylene, phosphine, hydrogen sulfide, etc. in the sewage and influenced the problem of the workman's production safety.

Description

Acetylene cleaning and sewage recovery system

Technical Field

The utility model belongs to the technical field of acetylene preparation processes, and particularly relates to an acetylene cleaning and pollution discharge recovery system.

Background

Currently, the industrial acetylene synthesis methods include hydrocarbon cracking and calcium carbide. In recent years, the production of acetylene by a calcium carbide method, which is a hydrolysis reaction of calcium carbide and is calcium carbide (CaC), has become a mainstream gradually ₂ ) And (3) controlling a certain temperature with water in a generator to generate crude acetylene gas, cooling, pressurizing by a water ring pump, delivering to two cleaning towers connected in series, removing sulfur, phosphorus and other impurities by a neutralization tower, condensing, demisting, removing water, preparing qualified acetylene gas, and delivering to a conversion station. Since industrial calcium carbide contains impurities such as sulfur and phosphorus, the acetylene gas generated by the reaction contains impurities such as hydrogen sulfide and phosphine, and the corresponding acid is generated by a cleaning process, and then the salt is generated by neutralization treatment with alkali to remove the acid.

In the existing acetylene cleaning section, crude acetylene gas from the generating procedure is discharged through a cooling tower and a cleaning tower, and the residual acetylene gas after washing and cooling enters a gas holder for storage through a separator and a flame arrester; the crude acetylene gas required by production enters an acetylene booster to be pressurized, and then is separated by a steam-water separator, and the separated acetylene gas enters a first cleaning tower and a second cleaning tower to remove hydrogen sulfide and phosphine in the acetylene gas; the purified acetylene gas enters a neutralization tower to be subjected to neutralization reaction with alkali liquor, and the refined acetylene gas is sent to a conversion process.

The existing acetylene cleaning section equipment comprises a gas cabinet, a gas-liquid separator, a flame arrester, a process pipeline, a booster and a blow-down pipeline of a hand washing pool, wherein the blow-down pipeline is directly discharged into a trench, and the trench is an open environment, but because acetylene is slightly dissolved in water, phosphine, hydrogen sulfide and the like still contained in sewage at the same time, the on-site peculiar smell is large near the trench, the environment is polluted, and meanwhile the production safety of workers is influenced.

Disclosure of Invention

The utility model aims to provide an acetylene cleaning and sewage recovery system, which aims to solve the problems that in the background technology, sewage pipelines are directly discharged into a trench, the trench is an open environment, the on-site peculiar smell is large near the trench, the environment is polluted, and the production safety of workers is influenced.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an acetylene cleaning blowdown recovery system, includes drain and the blowdown collecting channel, blowdown collecting tank and the sediment water recovery tank that communicate in proper order with drain, blowdown collecting channel, blowdown collecting tank and sediment water recovery tank are sealing device.

Further, the blowdown collecting pipeline comprises a blowdown collecting main pipe and a plurality of blowdown collecting branch pipes which are arranged in parallel, the inlet ends of the blowdown collecting branch pipes are communicated with the blowdown device, the outlet ends of the blowdown collecting branch pipes are connected with the inlet ends of the blowdown collecting main pipe, and the outlet ends of the blowdown collecting main pipe are connected with the blowdown collecting tanks.

Further, a control valve is arranged on the pollution discharge collecting branch pipe.

Further, the both sides that the top lateral wall of blowdown collecting vessel is relative set up sewage inlet and clear solution discharge port, sewage inlet is connected with blowdown collecting main's exit end, clear solution discharge port is connected with the sediment water recovery tank, the bottom of blowdown collecting vessel sets up the sediment mouth, and the bottom lateral wall of blowdown collecting vessel 8 sets up the manhole.

Further, the top of blowdown collection jar sets up high-point emptying mouth and the nitrogen gas replacement pipeline of parallel distribution, high-point emptying mouth department sets up the valve, set up the valve on the nitrogen gas replacement pipeline.

Further, the blowdown collection tank is connected with the slag water recovery tank through a communicating pipeline, and a pump body is arranged on the communicating pipeline.

Further, the communication pipeline is also provided with a regulating valve, and the regulating valve and the pump body are arranged in parallel.

Further, the sewage disposal device comprises a gas cabinet overflow water pipeline, a gas cabinet inlet sewage pipeline, a gas-liquid separator sewage pipeline, a flame arrester sewage pipeline, a process pipeline low-pressure steam condensate pipeline, an acetylene booster outlet sewage pipeline and a hand washing pool sewage pipeline, wherein the gas cabinet overflow water pipeline, the gas cabinet inlet sewage pipeline, the gas-liquid separator sewage pipeline, the flame arrester sewage pipeline, the process pipeline low-pressure steam condensate pipeline, the acetylene booster outlet sewage pipeline and the hand washing pool sewage pipeline are respectively communicated with the sewage collection branch pipe.

Compared with the prior art, the utility model has the beneficial effects that: the utility model sets up the airtight collection recovery unit at the back end of the apparatus blow-down unit of the clean workshop section of acetylene, return the supernatant clarified by sewage to the system and recycle, including blow-down collecting pipe, blow-down collecting tank and dreg water recovery tank communicated with blow-down unit sequentially, blow-down collecting pipe, blow-down collecting tank and dreg water recovery tank are the airtight device, avoid blow-down pipe discharge sewage, etc. into the open environment of the trench directly, have solved pollution environment such as acetylene, phosphine, hydrogen sulfide, etc. in the sewage and influenced the problem of the workman's production safety.

Drawings

FIG. 1 is a block diagram of a system of the present utility model;

in the figure: 1. a gas holder overflow water line; 2. a gas holder inlet blow-down line; 3. a gas-liquid separator blow-down line; 4. a flame arrester blow-down line; 5. a process pipeline low pressure steam condensate line; 6. an outlet blow-down pipeline of the acetylene booster; 7. a sink drain line; 8. a blowdown collection tank; 9. a slag water recovery tank.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Referring to fig. 1, the acetylene cleaning and sewage recovery system provided by the utility model comprises a sewage device, and a sewage collecting pipeline, a sewage collecting tank 8 and a slag water recovery tank 9 which are sequentially communicated with the sewage device, wherein the sewage collecting pipeline, the sewage collecting tank 8 and the slag water recovery tank 9 are all closed devices.

The sewage disposal device of the acetylene cleaning section equipment comprises a gas holder overflow water pipeline 1, a gas holder inlet sewage disposal pipeline 2, a gas-liquid separator sewage disposal pipeline 3, a flame arrester sewage disposal pipeline 4, a process pipeline low-pressure steam condensate pipeline 5, an acetylene booster outlet sewage disposal pipeline 6 and a hand washing basin sewage disposal pipeline 7.

The sewage collecting pipeline comprises a sewage collecting main pipe, a plurality of sewage collecting branch pipes are arranged at the inlet end of the sewage collecting main pipe, the plurality of sewage collecting branch pipes are arranged in parallel, the inlet ends of the sewage collecting branch pipes are respectively communicated with a gas cabinet overflow water pipeline 1, a gas cabinet inlet sewage pipeline 2, a gas-liquid separator sewage pipeline 3, a flame arrester sewage pipeline 4, a process pipeline low-pressure steam condensate pipeline 5, an acetylene booster outlet sewage pipeline 6 and a hand basin sewage pipeline 7, and control valves are arranged on the sewage collecting branch pipes; the outlet end of the sewage collecting main pipe is communicated with the sewage collecting tank 8.

The top side wall of the blowdown collection tank 8 is provided with a sewage inlet, the outlet end of the blowdown collection header pipe is communicated with the sewage inlet, the top of the blowdown collection tank 8 is provided with a clear liquid outlet relative to the side wall of one side of the sewage inlet, the clear liquid outlet is communicated with the slag water recovery tank 9, sewage discharged by a blowdown device of acetylene cleaning section equipment is collected in the blowdown collection tank 8 for sedimentation, the blowdown collection tank 8 is connected with the slag water recovery tank 9 through a communicating pipeline, a pump body and a regulating valve are arranged on the communicating pipeline, the regulating valve is arranged in parallel with the pump body, the pump body returns clear supernatant of the sewage to the system for recycling, and the flow rate of the supernatant can be controlled by controlling the opening of the regulating valve; the bottom of the sewage collection tank 8 is provided with a slag discharging port, the side wall of the bottom of the sewage collection tank 8 is provided with a manhole, and workers perform slag discharging on the sewage collection tank 8 at intervals of a certain period.

The top high point of blowdown collection tank 8 still sets up high point atmospheric vent and the nitrogen gas replacement pipeline of parallel distribution, and high point atmospheric vent department sets up the valve, sets up the valve on the nitrogen gas replacement pipeline, and high point atmospheric vent and nitrogen gas replacement pipeline are used for carrying out the evacuation to blowdown collection tank 8.

In summary, the sewage discharged by the sewage discharging device of the acetylene cleaning section equipment enters the sewage collecting header pipe through the sewage collecting branch pipe communicated with the sewage collecting header pipe, is collected in the sewage collecting tank for sedimentation, and the supernatant of the sewage after sedimentation in the sewage collecting tank is temporarily stored in the slag water recycling tank and then returned to the system for recycling, wherein the sewage collecting pipeline, the sewage collecting tank and the slag water recycling tank are all closed devices; according to the utility model, the sealed collecting and recycling device is arranged at the rear end of the sewage discharging device of the acetylene cleaning section equipment, clear supernatant of sewage is returned to the system for recycling, and a worker periodically opens the slag discharging port at the bottom of the sewage discharging and collecting tank to discharge slag, so that the sewage is prevented from being directly discharged into the open environment of a trench by a sewage discharging pipeline, and the problems of pollution to the environment and influence on the production safety of workers due to acetylene, phosphine, hydrogen sulfide and the like in the sewage are solved.

Claims

1. An acetylene cleaning and pollution discharge recovery system is characterized in that: the sewage treatment device comprises a sewage treatment device, and a sewage treatment collecting pipeline, a sewage treatment collecting tank (8) and a slag water recycling tank (9) which are sequentially communicated with the sewage treatment device, wherein the sewage treatment collecting pipeline, the sewage treatment collecting tank (8) and the slag water recycling tank (9) are all airtight devices.

2. The acetylene cleaning blowdown recovery system of claim 1, wherein: the sewage collecting pipeline comprises a sewage collecting main pipe and a plurality of sewage collecting branch pipes which are arranged in parallel, wherein the inlet ends of the sewage collecting branch pipes are communicated with a sewage device, the outlet ends of the sewage collecting branch pipes are connected with the inlet ends of the sewage collecting main pipe, and the outlet ends of the sewage collecting main pipe are connected with a sewage collecting tank (8).

3. The acetylene cleaning blowdown recovery system of claim 2, wherein: and a control valve is arranged on the pollution discharge collecting branch pipe.

4. The acetylene cleaning blowdown recovery system of claim 3, wherein: the sewage collecting tank is characterized in that a sewage inlet and a clear liquid outlet are formed in two opposite sides of the side wall of the top of the sewage collecting tank (8), the sewage inlet is connected with the outlet end of the sewage collecting main pipe, the clear liquid outlet is connected with the slag water recycling tank (9), a slag discharging port is formed in the bottom of the sewage collecting tank (8), and a manhole is formed in the side wall of the bottom of the sewage collecting tank (8).

5. The acetylene cleaning blowdown recovery system of claim 4, wherein: the top of blowdown collection jar (8) sets up high-point emptying mouth and the nitrogen gas replacement pipeline of parallel distribution, high-point emptying mouth department sets up the valve, set up the valve on the nitrogen gas replacement pipeline.

6. The acetylene cleaning blowdown recovery system of claim 5, wherein: the sewage collection tank (8) is connected with the slag water recovery tank (9) through a communicating pipeline, and a pump body is arranged on the communicating pipeline.

7. The acetylene cleaning blowdown recovery system of claim 6, wherein: and the communication pipeline is also provided with a regulating valve, and the regulating valve and the pump body are arranged in parallel.

8. The acetylene cleaning blowdown recovery system of claim 7, wherein: the sewage disposal device comprises a gas holder overflow water pipeline (1), a gas holder inlet sewage pipeline (2), a gas-liquid separator sewage pipeline (3), a flame arrester sewage pipeline (4), a process pipeline low-pressure steam condensate pipeline (5), an acetylene booster outlet sewage pipeline (6) and a hand washing tank sewage pipeline (7), wherein the gas holder overflow water pipeline (1), the gas holder inlet sewage pipeline (2), the gas-liquid separator sewage pipeline (3), the flame arrester sewage pipeline (4), the process pipeline low-pressure steam condensate pipeline (5), the acetylene booster outlet sewage pipeline (6) and the hand washing tank sewage pipeline (7) are respectively communicated with a sewage collection branch pipe.