CN219335200U

CN219335200U - Shutdown purging system for chemical device vacuum pump

Info

Publication number: CN219335200U
Application number: CN202320607593.2U
Authority: CN
Inventors: 魏磊; 滕文彬; 张生安; 祝秀林
Original assignee: Shandong Haike Xinyuan Material Technology Co ltd
Current assignee: Shandong Haike Xinyuan Material Technology Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-07-14
Anticipated expiration: 2033-03-24

Abstract

The utility model discloses a shutdown purging system for a chemical device vacuum pump, which comprises a nitrogen gas supply device, a hot water tracing supply group device, a hot water tracing recovery group device, a cleaning agent supply device, a process inlet, a cleaning agent solvent storage tank, an outlet material recovery tank, a screw vacuum pump and a nitrogen purging port. According to the utility model, a manual or automatic shutdown purging mode can be adopted from the comprehensive consideration of the process and economic cost, the independent purging of the solvent and nitrogen can be realized, the combined purging can also be realized, after purging, the vacuum pump moving part has no jamming site, meanwhile, the damage of corrosive materials to equipment can be reduced, the service life of the equipment is greatly prolonged, and the equipment failure time is reduced.

Description

Shutdown purging system for chemical device vacuum pump

Technical Field

The utility model relates to the technical field of chemical devices, in particular to a shutdown purging system for a vacuum pump of a chemical device.

Background

In the chemical industry device, the vacuum pump carries out reduced pressure distillation, vacuum drying, vacuum concentration, vacuum crystallization, negative pressure conveying and the like on system materials according to process requirements, and can be applied to industries such as petroleum, chemical industry, food, optics, electricity, electronics, atomic energy, semiconductors, aerospace, low temperature, special machinery, textiles, papermaking and the like, the vacuum pump can contact materials of various types and properties in the running process, a technical person selects the vacuum pump with applicable materials and forms according to actual conditions, and due to different material properties in the system, solidification, crystallization, coking, corrosion or phenomena such as particle powder can occur, equipment cannot be started normally again after shutdown, even serious problems such as equipment corrosion damage can be caused, and in order to ensure that spare equipment can be started normally, a set of purging device is specially designed to purge materials in the system.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a shutdown purging system for a vacuum pump of a chemical device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a shut down and sweep system for chemical plant device vacuum pump, includes nitrogen gas air feed unit, companion hot water supply group device, companion hot water recovery group device, cleaner supply unit, technology import, cleaner solvent storage tank, export material recovery jar, screw vacuum pump and nitrogen gas sweeps the mouth, cleaner solvent storage tank upper wall is provided with cleaner import, nitrogen gas entry respectively, cleaner supply unit passes through pipeline and cleaner access connection, nitrogen gas air feed unit passes through two sets of pipelines and is connected with nitrogen gas entry, nitrogen gas purging the mouth respectively, the screw vacuum pump passes through the pipeline setting between nitrogen purging mouth and export material recovery jar, the pipeline outer wall between nitrogen purging mouth and the screw vacuum pump is provided with nitrogen purging valve, technology import and cleaner solvent storage tank export are connected through the pipeline outer wall between a set of pipeline and the nitrogen purging valve and the screw vacuum pump respectively, export material recovery jar upper wall and be close to right-hand member position and be provided with the technology export, export material recovery jar left end from the top down is provided with companion hot water entry, companion hot water export in proper order, companion hot water export keep away from the one end of export material recovery jar companion hot water and companion hot water export is connected with in the companion hot water supply group device respectively.

As a further description of the above technical solution:

a cleaning solution supplementing valve is arranged between the cleaning agent inlet and the cleaning agent solvent storage tank, and a nitrogen regulating valve is arranged between the nitrogen inlet and the cleaning agent solvent storage tank.

As a further description of the above technical solution:

a first shut-off valve is arranged between the process inlet and a pipeline connecting the nitrogen purging port and the screw vacuum pump, and a first inlet needle valve is arranged between the cleaning agent solvent storage tank and the pipeline connecting the nitrogen purging port and the screw vacuum pump.

As a further description of the above technical solution:

and a Y-shaped filter joint is arranged on the outer wall of the hot water outlet.

As a further description of the above technical solution:

the side wall of the cleaning agent solvent storage tank is provided with a cleaning agent viewing mirror for observing the storage quantity of the cleaning agent.

As a further description of the above technical solution:

the side wall of the outlet material recovery tank is provided with a recovery tank view mirror for observing the inside of the outlet material recovery tank

The utility model has the following beneficial effects:

compared with the prior art, the shutdown purging system for the vacuum pump of the chemical device can comprehensively consider the process and economic cost and adopt a manual or automatic shutdown purging mode, can realize independent purging of solvent and nitrogen, can also realize combined purging, has no jamming site of moving parts of the vacuum pump after purging, can reduce the damage of corrosive materials to equipment, greatly prolongs the service life of the equipment and reduces the equipment failure time.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a shutdown purge system for a chemical plant vacuum pump according to the present utility model;

FIG. 2 is a schematic diagram of a cleaning agent solvent storage tank and a cleaning agent sight glass of a shutdown purge system for a vacuum pump of a chemical plant;

fig. 3 is a schematic diagram of the structure of an outlet material recovery tank and a recovery tank sight glass of a shutdown purge system for a vacuum pump of a chemical plant.

Fig. 4 is a schematic diagram of a vacuum system using a Roots vacuum pump as a main pump for a shutdown purge system for a chemical plant vacuum pump according to the present utility model.

Legend description:

1. a cleaning agent solvent storage tank; 2. a screw vacuum pump; 3. an outlet material recovery tank; 4. roots vacuum pump; 5. a process inlet; 6. a cleaning agent inlet; 7. a nitrogen inlet; 8. a hot water inlet; 9. a hot water outlet; 10. a process outlet; 11. a first shut-off valve; 12. a nitrogen purge port; 13. a nitrogen purge valve; 14. a cleaning liquid replenishing valve; 15. a nitrogen regulating valve; 16. a first inlet needle valve; 17. a Y-shaped filter joint; 18. a cleaning agent viewing mirror; 19. recovering the tank sight glass; 20. a second inlet needle valve.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1 to 3, the present utility model provides a shutdown purge system for a vacuum pump of a chemical plant: the device comprises a nitrogen gas supply device, a hot water tracing supply unit, a hot water tracing recovery unit, a cleaning agent supply device, a process inlet 5, a cleaning agent solvent storage tank 1, an outlet material recovery tank 3, a screw vacuum pump 2 and a nitrogen purging port 12, wherein a first cut-off valve 11 is arranged between the process inlet 5 and a pipeline connecting the nitrogen purging port 12 and the screw vacuum pump 2, and the first cut-off valve 11 is used for cutting off a production system to finish shutdown;

the upper wall of the cleaning agent solvent storage tank 1 is respectively provided with a cleaning agent inlet 6 and a nitrogen inlet 7, a cleaning agent supply device is connected with the cleaning agent inlet 6 through pipelines, a nitrogen gas supply device is respectively connected with the nitrogen inlet 7 and a nitrogen purging port 12 through two groups of pipelines, a cleaning agent supplementing valve 14 is arranged between the cleaning agent inlet 6 and the cleaning agent solvent storage tank 1, a nitrogen regulating valve 15 is arranged between the nitrogen inlet 7 and the cleaning agent solvent storage tank 1, the nitrogen regulating valve 15 is used for controlling the nitrogen inlet 7 to be introduced into the cleaning agent solvent storage tank 1, the nitrogen is introduced into the cleaning agent solvent storage tank 1 so that the interior of the cleaning agent solvent storage tank 1 always keeps positive pressure, the cleaning agent supplementing valve 14 is used for supplementing cleaning agent to the cleaning agent solvent storage tank 1, the nitrogen purging valve is arranged on the side wall of the cleaning agent solvent storage tank 1, a cleaning agent viewing mirror 18 is used for viewing the cleaning agent storage amount in the cleaning agent solvent storage tank 1, and the nitrogen purging port 12 can be introduced into the nitrogen for purging;

the screw vacuum pump 2 is arranged between the nitrogen purging port 12 and the outlet material recovery tank 3 through a pipeline, a nitrogen purging valve 13 is arranged on the outer wall of the pipeline between the nitrogen purging port 12 and the screw vacuum pump 2, the process inlet 5 and the outlet of the cleaning agent solvent storage tank 1 are respectively connected with the outer wall of the pipeline between the nitrogen purging valve 13 and the screw vacuum pump 2 through a group of pipelines, a first inlet needle valve 16 is arranged between the cleaning agent solvent storage tank 1 and the pipeline connecting the nitrogen purging port 12 and the screw vacuum pump 2, and the cleaning agent can be flushed along the pipeline by the first inlet needle valve 16 after being opened;

the upper wall of the outlet material recovery tank 3 is provided with a process outlet 10 near the right end, the left end of the outlet material recovery tank 3 is sequentially provided with a heat tracing water inlet 8 and a heat tracing water outlet 9 from top to bottom, one ends of the heat tracing water inlet 8 and the heat tracing water outlet 9, which are far away from the outlet material recovery tank 3, are respectively connected with a heat tracing water supply unit device and a heat tracing water recovery unit device, the outer wall of the heat tracing water outlet 9 is provided with a Y-shaped filter joint 17, the side wall of the outlet material recovery tank 3 is provided with a recovery tank view mirror 19 for observing the inside condition of the outlet material recovery tank 3, and the washed noncondensable gas is discharged to a common tail gas recovery system in the market for treatment through the process outlet 10.

Working principle: in order to clean the inside of the screw vacuum pump 2, the types of cleaning solvents (such as acetone, dimethyl carbonate and the like) are required to be selected in advance according to substances in the system, the first cut-off valve 11 is closed, the cleaning liquid supplementing valve 14 is opened to supplement the cleaning liquid, the cleaning liquid level in the cleaning solvent storage tank 1 is confirmed through the cleaning agent sight glass 18, the nitrogen adjusting valve 15 is opened, the positive pressure inside the cleaning solvent storage tank 1 is ensured, the first inlet needle valve 16 is slowly opened, the cleaning agent in the cleaning solvent storage tank 1 is sequentially sprayed into the screw vacuum pump 2 and the outlet material recovery tank 3, noncondensable gas enters the tail gas absorption system through the process outlet 10, and after the pipeline flushing is finished, the nitrogen purging valve 13 is opened to blow dry the residual solvent in the pump body.

Example two

Referring to fig. 4, the utility model provides a shutdown purge system for a chemical plant vacuum pump: the first difference between this embodiment and the embodiment is that the chemical apparatus is a main pump using a Roots vacuum pump 4 as a vacuum system, the Roots vacuum pump 4 is disposed between the screw vacuum pump 2 and the nitrogen purge valve 13, and the outlet of the cleaning agent solvent tank 1 is branched into a pipe connected between the Roots vacuum pump 4 and the screw vacuum pump 2, and a second inlet needle valve 20 is disposed on the pipe, and cleaning agent can be flushed from the Roots vacuum pump 4 by the same first inlet needle valve 16 as in the first embodiment.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a shut down and sweep system for chemical plant device vacuum pump, includes nitrogen gas air feed unit, accompanies hot water supply group device, accompanies hot water recovery group device, cleaner supply device, technology import (5), cleaner solvent storage tank (1), export material recovery jar (3), screw vacuum pump (2) and nitrogen gas and sweeps mouth (12), its characterized in that: the cleaning agent solvent storage tank (1) upper wall is provided with cleaning agent import (6), nitrogen gas entry (7) respectively, cleaning agent supply device passes through pipeline and cleaning agent import (6) to be connected, nitrogen gas air feeder passes through two sets of pipelines and is connected with nitrogen gas entry (7), nitrogen gas purging mouth (12) respectively, screw rod vacuum pump (2) are through the pipeline setting between nitrogen purging mouth (12) and export material recovery jar (3), the pipeline outer wall between nitrogen purging mouth (12) and screw rod vacuum pump (2) is provided with nitrogen purging valve (13), pipeline outer wall connection between process inlet (5) and cleaning agent solvent storage tank (1) export respectively through a set of pipeline and nitrogen purging valve (13) and screw rod vacuum pump (2), export material recovery jar (3) upper wall just is close to right-hand member position and is provided with process outlet (10), export material recovery jar (3) left end from top down has set gradually companion hot water entry (8), companion hot water outlet (9) keep away from export material recovery jar (3) and are connected in set up in set of the device respectively companion recovery device respectively.

2. A shutdown purge system for a chemical plant vacuum pump as claimed in claim 1, wherein: a cleaning fluid supplementing valve (14) is arranged between the cleaning agent inlet (6) and the cleaning agent solvent storage tank (1), and a nitrogen regulating valve (15) is arranged between the nitrogen inlet (7) and the cleaning agent solvent storage tank (1).

3. A shutdown purge system for a chemical plant vacuum pump as claimed in claim 2, wherein: a first shut-off valve (11) is arranged between the process inlet (5) and a pipeline connected with the nitrogen purging port (12) and the screw vacuum pump (2), and a first inlet needle valve (16) is arranged between the cleaning agent solvent storage tank (1) and the pipeline connected with the nitrogen purging port (12) and the screw vacuum pump (2).

4. A shutdown purge system for a chemical plant vacuum pump according to claim 3, wherein: the outer wall of the heat tracing water outlet (9) is provided with a Y-shaped filter joint (17).

5. A shutdown purge system for a chemical plant vacuum pump as claimed in claim 4, wherein: the side wall of the cleaning agent solvent storage tank (1) is provided with a cleaning agent viewing mirror (18) for observing the storage quantity of the cleaning agent.

6. A shutdown purge system for a chemical plant vacuum pump as claimed in claim 5, wherein: the side wall of the outlet material recovery tank (3) is provided with a recovery tank view mirror (19) for observing the inside of the outlet material recovery tank (3).