CN211422859U

CN211422859U - Drainage device for polyolefin catalyst mother liquor recovery vacuum pump

Info

Publication number: CN211422859U
Application number: CN201922215616.1U
Authority: CN
Inventors: 蒋召财; 刘豪; 范建波; 刘杰; 辜宇; 郭焰威
Original assignee: Sichuan Jincheng Chemical Catalyst Co ltd
Current assignee: Sichuan Jincheng Chemical Catalyst Co ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-09-04
Anticipated expiration: 2029-12-12

Abstract

The utility model provides a drainage device for vacuum pump is retrieved to polyolefin catalyst mother liquor, including the first flowing back valve, holding vessel and the second flowing back valve of tube coupling in proper order, first flowing back valve passes through pipeline and the lower intercommunication of vacuum pump chamber, and the second flowing back valve passes through pipeline and mother liquor storage tank intercommunication. Compared with the prior art, the utility model discloses following beneficial effect has: through the collection tank that sets up and with first flowing back valve, the second flowing back valve of collection tank front and back tube coupling, under the state that keeps the vacuum pump continuous operation, can in time discharge the condensation hydrops of pump chamber export to retrieve once more, solved the problem that the vacuum pump caused frequently to stop the pump clearance, overhaul because of the hydrops, improved mother liquor recovery efficiency, reduced environmental pollution and the equipment corrosion because of overhauing and causing.

Description

Drainage device for polyolefin catalyst mother liquor recovery vacuum pump

Technical Field

The utility model relates to a polyolefin catalyst production facility technical field, concretely relates to drain for vacuum pump is retrieved to polyolefin catalyst mother liquor.

Background

The mother liquor produced in the production process of the polyolefin catalyst mainly comprises a mixed solution of several organic matters and certain titanium-containing substances, and after the production of the catalyst is finished, the titanium-containing substances in the mother liquor need to be evaporated and separated so as to achieve the purpose of recovery.

In the process of separating and recovering the mother liquor, the mother liquor needs to be heated and rectified, and a piston type vacuum pump is needed to be used for vacuumizing in the process of rectifying for evaporating the mother liquor. Current vacuum pump is at the in-process of evacuation, because the reason of mother liquor evaporation gas condensation can slowly form the hydrops in the pump chamber, and the structure of present vacuum pump can't in time discharge the hydrops, and long-time operation can cause the pump trouble, causes the vacuum pump frequently to dismantle and washs and overhaul, influences mother liquor recovery efficiency, simultaneously because of the hydrops is the titanium-containing medium, meets the air and can produce a large amount of acid smog when dismantling and overhaul, can serious polluted environment and corrosion apparatus.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a polyolefin catalyst mother liquor retrieves drain for vacuum pump can accomplish the discharge of pump chamber hydrops under the circumstances that equipment does not shut down, improves mother liquor recovery efficiency, collects and reuse the titaniferous medium who discharges simultaneously.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of drainage device for vacuum pump is retrieved to polyolefin catalyst mother liquor, including the first flowing back valve, holding vessel and the second flowing back valve of tube coupling in proper order, first flowing back valve passes through pipeline and the lower intercommunication of vacuum pump chamber, the second flowing back valve passes through pipeline and mother liquor storage tank intercommunication.

Further, a liquid level meter for monitoring the liquid level in the collecting tank is installed on the side surface of the collecting tank.

Further, the liquid level meter is an electric contact liquid level meter or a capacitance type liquid level meter.

Furthermore, the first drain valve and the second drain valve are automatic drain valves, and are respectively electrically connected with the liquid level meter, and the first drain valve and the second drain valve are controlled in an interlocking manner.

Furthermore, the upper part of the collecting tank is provided with an emptying pipe connected to an emptying processing system, the emptying pipe is provided with an emptying valve, and the emptying pipe and the emptying valve jointly form an emptying pipeline.

Furthermore, a nitrogen gas replacement pipe is connected to the vent pipe between the vent valve and the collecting tank, a replacement valve is installed on the nitrogen gas replacement pipe, and the nitrogen gas replacement pipe and the replacement valve jointly form a nitrogen gas replacement pipeline.

Furthermore, the emptying valve and the replacement valve are all program control valves.

Furthermore, the emptying valve and the second drain valve are controlled in an interlocking mode, and the replacement valve is electrically connected with the second drain valve.

Compared with the prior art, the utility model provides a drain for vacuum pump is retrieved to polyolefin catalyst mother liquor has following beneficial effect:

1. through the collection tank, the first drain valve and the second drain valve which are connected with the front pipeline and the rear pipeline of the collection tank, condensed accumulated liquid at the outlet of the pump cavity can be discharged in time and recycled again under the condition that the vacuum pump keeps running continuously, the problems of frequent pump stopping, cleaning and maintenance of the vacuum pump caused by the accumulated liquid are solved, the recovery efficiency of mother liquid is improved, and environmental pollution and equipment corrosion caused by maintenance are reduced;

2. the vent pipe and the vent valve form a vent pipeline, so that the titanium-containing gas in the collecting tank enters a vent treatment system for treatment and then is discharged, and the environmental pollution is reduced;

3. through the nitrogen gas replacement pipeline that nitrogen gas replacement pipe and replacement valve formed for the discharge of vacuum pump chamber hydrops is accomplished under the protection of full nitrogen, has kept apart the contact of titanium-containing medium in the hydrops and air, has stopped the corruption of equipment, and has further reduced environmental pollution.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The reference numerals are explained below:

1: first drain valve 2: a collection tank 3: second drain valve

4: a vacuum pump 5: a liquid level meter 6: emptying pipe

7: the emptying valve 8: nitrogen gas replacement pipe 9: and (4) replacing the valve.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1, the utility model provides a drainage device for vacuum pump is retrieved to polyolefin catalyst mother liquor, including first flowing back valve 1, holding vessel 2 and the second flowing back valve 3 of tube coupling in proper order, first flowing back valve 1 communicates through pipeline and 4 pump chamber minimums of vacuum pump, and second flowing back valve 3 communicates through pipeline and mother liquor storage tank (not shown in the figure). In the present embodiment, the vacuum pump 4 is a piston vacuum pump. Through the collection tank that sets up and with first flowing back valve, the second flowing back valve of collection tank front and back tube coupling, under the state that keeps the vacuum pump continuous operation, can in time discharge the condensation hydrops of pump chamber export to retrieve once more, solved the problem that the vacuum pump caused frequently to stop the pump clearance, overhaul because of the hydrops, improved mother liquor recovery efficiency, reduced environmental pollution and the equipment corrosion because of overhauing and causing.

Specifically, a first drain valve 1 of DN15 is installed at the opening of the lowest part of the pump chamber of the vacuum pump 4 (i.e., the outlet of the chamber), and a pipe configured with DN15 is connected downward to the collection tank 2; the collecting tank 2 is made of carbon steel, the volume of the collecting tank is about 1m, the collecting tank is used for collecting effusion discharged from a cavity of the vacuum pump 4, and a liquid level meter 5 is installed on the side face of the collecting tank 2 and used for monitoring the liquid level in the collecting tank 2; a second drain valve 3 of DN25 is arranged at the lower part of the collecting tank 2, and the rear part of the second drain valve 3 is connected with a pipeline of DN25 to the mother liquor storage tank.

In the present embodiment, the liquid level meter 5 is an electric contact liquid level meter or a capacitance type liquid level meter; the first liquid discharge valve 1 and the second liquid discharge valve 3 are automatic liquid discharge valves and are respectively electrically connected with the liquid level meter 5, and the first liquid discharge valve 1 and the second liquid discharge valve 3 are controlled in an interlocking mode, namely when the first liquid discharge valve 1 is opened, the second liquid discharge valve 3 is closed, and vice versa.

The upper part of the collecting tank 2 is provided with an emptying pipe 6 connected to an emptying processing system (not shown in the figure), the emptying pipe 6 is provided with an emptying valve 7, and the emptying pipe 6 and the emptying valve 7 jointly form an emptying pipeline. Through the emptying pipeline, the titanium-containing gas in the collecting tank enters the emptying processing system for processing and then is discharged, so that the environmental pollution is reduced.

The blow-down pipe 6 between the blow-down valve 7 and the collecting tank 2 is connected with a nitrogen gas replacement pipe 8, the nitrogen gas replacement pipe 8 is provided with a replacement valve 9, and the nitrogen gas replacement pipe 8 and the replacement valve 9 jointly form a nitrogen gas replacement pipeline for filling nitrogen gas into the collecting tank 2, pressurizing and draining the collecting tank 2 and protecting and replacing. Through the nitrogen replacement pipeline, the discharge of the accumulated liquid in the pump cavity of the vacuum pump is completed under the protection of full nitrogen, the contact between a titanium-containing medium in the accumulated liquid and air is isolated, the corrosion of equipment is avoided, and the environmental pollution is further reduced.

Specifically, the diameter of the vent pipe 6 is set to DN20, and the diameter of the nitrogen gas replacement pipe 8 is set to DN 15. The emptying valve 7 and the replacement valve 9 are program control valves, the emptying valve 7 and the second liquid discharge valve 3 are controlled in an interlocking mode, and the control principle of the second liquid discharge valve is the same as that of the first liquid discharge valve 1 and the second liquid discharge valve 3; the replacement valve 9 is electrically connected to the second drain valve 3.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. The utility model provides a drain for vacuum pump is retrieved to polyolefin catalyst mother liquor which characterized in that, includes first flowing back valve, holding vessel and the second flowing back valve of tube coupling in proper order, first flowing back valve passes through the pipeline and communicates with the lowest of vacuum pump chamber, the second flowing back valve passes through pipeline and mother liquor storage tank intercommunication.

2. The drainage device for a polyolefin catalyst mother liquor recovery vacuum pump according to claim 1, characterized in that a liquid level meter for monitoring the liquid level in the collection tank is installed on the side of the collection tank.

3. The drainage device for the polyolefin catalyst mother liquor recovery vacuum pump as claimed in claim 2, wherein the liquid level meter is an electric contact liquid level meter or a capacitance type liquid level meter.

4. The drainage device for the polyolefin catalyst mother liquor recovery vacuum pump as claimed in claim 2 or 3, wherein the first drainage valve and the second drainage valve are automatic drainage valves and are respectively electrically connected with the liquid level meter, and the first drainage valve and the second drainage valve are controlled in an interlocking manner.

5. The drainage device for the polyolefin catalyst mother liquor recovery vacuum pump as claimed in claim 1 or 2, wherein the upper part of the collection tank is provided with a vent pipe connected to a vent treatment system, the vent pipe is provided with a vent valve, and the vent pipe and the vent valve together form a vent pipeline.

6. The drainage device for the polyolefin catalyst mother liquor recovery vacuum pump as claimed in claim 5, wherein a nitrogen gas replacement pipe is connected to the blow pipe between the blow valve and the collection tank, a replacement valve is installed on the nitrogen gas replacement pipe, and the nitrogen gas replacement pipe and the replacement valve together form a nitrogen gas replacement pipeline.

7. The drainage device for a polyolefin catalyst mother liquor recovery vacuum pump according to claim 6, characterized in that the blow valve and the replacement valve are programmed valves.

8. The drainage device for the polyolefin catalyst mother liquor recovery vacuum pump as claimed in claim 6 or 7, wherein the emptying valve is controlled in an interlocking manner with the second drainage valve, and the replacement valve is electrically connected with the second drainage valve.