CN-224208729-U - Cleaning device for caprolactam monomer recovery discharge pipeline and control system thereof

CN224208729UCN 224208729 UCN224208729 UCN 224208729UCN-224208729-U

Abstract

The utility model belongs to the technical field of caprolactam monomer recovery devices, and particularly relates to a cleaning device for a caprolactam monomer recovery and discharge pipeline and a control system thereof. The cleaning device comprises a discharge tank and a receiving tank which are connected through a discharge pipeline, and further comprises a steam pulse pipeline connected to the discharge pipeline, wherein the steam pulse pipeline comprises a steam pipeline section and a pulse purging section, a steam filtering structure and a steam electromagnetic valve are arranged on the pulse purging section, the steam electromagnetic valve is in linkage with a pneumatic valve of the discharge pipeline on the discharge pipeline in opening mode, and after the pneumatic valve of the discharge pipeline reaches a certain opening mode, the steam electromagnetic valve is opened to automatically purge the discharge pipeline after filtration. According to the utility model, the high-pressure steam pipeline is added on the discharge pipeline, when the pipeline is not smooth and has the condition of low polymer precipitation and blockage, the discharge can be stopped at the moment, the high-pressure steam is started to purge the discharge pipeline, so that the blockage is cleaned in time, the expansion of the problem of low polymer precipitation and blockage is avoided, and the normal operation of production is ensured.

Inventors

WANG ZHONGHAO
ZHAO HONGLIANG
WANG HAO
ZHAO TIEGANG
XU BAIYAN
MA YINGZHE

Assignees

天津长芦海晶集团有限公司

Dates

Publication Date: 20260508
Application Date: 20250407

Claims (10)

1. The cleaning device for the caprolactam monomer recycling discharge pipeline comprises a discharge tank and a receiving tank which are connected through a discharge pipeline, and is characterized by further comprising a steam pulse pipeline connected to the discharge pipeline, wherein the steam pulse pipeline comprises a steam pipeline section and a pulse purging section, a steam filtering structure and a steam electromagnetic valve are arranged on the pulse purging section, the steam electromagnetic valve is in linkage with a discharge pipeline pneumatic valve on the discharge pipeline in opening degree, and when the discharge pipeline pneumatic valve reaches a certain opening degree, the steam electromagnetic valve is opened, and filtered steam starts to automatically purge the discharge pipeline.
2. The cleaning device for caprolactam monomer recycling and discharging pipeline according to claim 1, wherein one end of the pulse purging section is connected with the steam pipeline section through a connecting flange, and the other end is connected with a steam pipeline interface of the discharging pipeline in a welding mode through a welding valve.
3. The cleaning device for caprolactam monomer recycling and discharging pipeline according to claim 1, wherein a discharging electromagnetic valve is arranged on the discharging pipeline between the discharging tank and the pulse purging section, and a discharging pipeline pneumatic valve is arranged on the discharging pipeline between the pulse purging section and the receiving tank.
4. The cleaning device for caprolactam monomer recycling and discharging pipeline according to claim 1, wherein the central axis of the output section of the pulse purging section is on the same straight line with the central axis of the discharging pipeline between the pulse purging section and the receiving tank.
5. The cleaning device for caprolactam monomer recycling and discharging pipeline according to claim 1, wherein the steam filtering structure comprises a steam coarse filter and a steam fine filter which are sequentially arranged along the steam flowing direction in the pulse purging section.
6. The device for cleaning a caprolactam monomer recycling and discharging pipeline according to claim 5, wherein the steam coarse filter and the steam fine filter are one of a net filter and a medium filter, and the filtering precision of the steam coarse filter is lower than that of the steam fine filter.
7. The cleaning device for caprolactam monomer recycling and discharging pipeline according to claim 1, wherein the pulse purging section is further provided with a steam pressure regulating valve.
8. The cleaning device for caprolactam monomer recycling and discharging pipelines according to claim 1, wherein liquid level detection structures are respectively arranged on the discharging tank and the receiving tank, and flow detection structures are also arranged on the discharging pipelines.
9. A control system for a cleaning device for a caprolactam monomer recovery and discharge line according to any one of claims 1 to 8, comprising: a steam electromagnetic valve arranged on the steam pulse pipeline; a discharging electromagnetic valve, a flowmeter and a discharging pipeline pneumatic valve which are arranged on the discharging pipeline; a discharge tank liquid level gauge arranged on the discharge tank; a receiving tank level gauge disposed on the receiving tank; The control system is electrically connected with the steam electromagnetic valve, the discharging electromagnetic valve, the flowmeter, the opening sensor, the discharging pipeline pneumatic valve, the discharging tank liquid level meter and the receiving tank liquid level meter.
10. The control system of the caprolactam monomer recycling and discharging pipeline cleaning device according to claim 9, wherein the discharging pipeline pneumatic valve is in opening linkage with one or more of a steam electromagnetic valve, a flowmeter, an opening sensor, a discharging tank liquid level meter and a receiving tank liquid level meter.

Description

Cleaning device for caprolactam monomer recovery discharge pipeline and control system thereof Technical Field The utility model belongs to the technical field of caprolactam monomer recovery devices, and particularly relates to a cleaning device for a caprolactam monomer recovery and discharge pipeline and a control system thereof. Background In the caprolactam monomer recovery process, the discharge pipeline is easy to be blocked after long-term use due to the existence of the oligomer. Oligomers are mainly cyclic dimers and cyclic trimers, which are very prone to crystallize out under certain conditions, thus blocking the pipeline. Once a blockage occurs, normal production is affected, a shutdown process is required, and maintenance cost is increased. The prior art usually adopts the manual mode to clear up the row material pipeline regularly, but this kind of mode has certain potential safety hazard, and efficiency is lower. In addition, there are methods of washing with chemical agents, but such methods create new environmental pollution problems. In addition, the caprolactam monomer recovery and discharge pipeline cannot be cleaned in time in the prior art, so that the expansion of the problem of blockage caused by oligomer precipitation cannot be avoided, and the normal operation of production is influenced. The prior art can not judge whether the pipeline is not smooth in time when the opening of the discharge valve is found to be increased, and measures can not be taken in time to clean the blockage. The prior art has the following defects: 1. The problem that the oligomer is separated out and blocked after the caprolactam monomer recovery discharging pipeline is used for a long time cannot be effectively prevented in the prior art, normal production is influenced once the oligomer is blocked, stop treatment is needed, and maintenance cost is increased. 2. The prior art adopts the manual mode to clear up the material discharging pipeline regularly and has certain potential safety hazard, and efficiency is lower. 3. The prior art method of flushing the discharge conduit with chemical agents creates new environmental pollution problems. 4. The prior art cannot clean a caprolactam monomer recovery discharge pipeline in time, and cannot avoid expansion of the problem of oligomer precipitation blockage, so that normal operation of production is affected. 5. The prior art can not judge whether the pipeline is not smooth in time when the opening of the discharge valve is found to be increased, and measures can not be taken in time to clean the blockage. Therefore, a safe and efficient method is needed to clean the caprolactam monomer recovery and discharge pipeline in time, avoid the expansion of the problem of oligomer precipitation and blockage and ensure the normal operation of production. Disclosure of utility model The utility model aims to solve the problems in the prior art and provides a cleaning device for a caprolactam monomer recycling and discharging pipeline and a control system thereof. The technical scheme adopted by the utility model for solving the problem is as follows: The cleaning device for the caprolactam monomer recycling discharge pipeline comprises a discharge tank and a receiving tank which are connected through a discharge pipeline, and is characterized by further comprising a steam pulse pipeline connected to the discharge pipeline, wherein the steam pulse pipeline comprises a steam pipeline section and a pulse purging section, a steam filtering structure and a steam electromagnetic valve are arranged on the pulse purging section, the steam electromagnetic valve is in linkage with a discharge pipeline pneumatic valve on the discharge pipeline in opening degree, and when the discharge pipeline pneumatic valve reaches a certain opening degree, the steam electromagnetic valve is opened, and filtered steam starts to automatically purge the discharge pipeline. In the above technical scheme, one end of the pulse purging section is connected with the steam pipeline section through a connecting flange, and the other end is connected with a steam pipeline interface of the discharge pipeline in a welding mode through a welding valve. In the above technical solution, the steam pipe section is a high-pressure steam pipe. In the technical scheme, a discharging electromagnetic valve is arranged on a discharging pipeline between the discharging tank and the pulse purging section, and a discharging pipeline pneumatic valve is arranged on the discharging pipeline between the pulse purging section and the receiving tank. In the above technical scheme, the central axis of the output section of the pulse purging section and the central axis of the discharge pipeline between the pulse purging section and the receiving tank are on the same straight line. In the above technical scheme, the steam filtering structure comprises a steam coarse filter and a steam fine filter which are sequentially arrange