CN214248304U

CN214248304U - Dry gas sealing process device of propylene compressor unit

Info

Publication number: CN214248304U
Application number: CN202022759386.8U
Authority: CN
Inventors: 何圣龙; 聂成元; 孙健; 法耀锋; 薛海峰; 刘晓刚; 其他发明人请求不公开姓名
Original assignee: Shaanxi Changqing Energy & Chemical Co ltd
Current assignee: Shaanxi Changqing Energy & Chemical Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-09-21
Anticipated expiration: 2030-11-25

Abstract

The utility model belongs to the technical field of coal chemical industry, and discloses a dry gas sealing process device of a propylene compressor unit, which comprises a propylene storage tank, wherein the outer side wall of the propylene storage tank is fixedly connected with a gas transmission pipeline, one side of the propylene storage tank is provided with a compressor, one end of the gas transmission pipeline, which is far away from the propylene storage tank, is fixedly connected with a dry gas sealing primary sealing gas main pipe, one end of the compressor is provided with a gas inlet, and the outer circumferential wall of the dry gas sealing primary sealing gas main pipe is fixedly provided with a hand valve. Is beneficial to the use and popularization of the device.

Description

Dry gas sealing process device of propylene compressor unit

Technical Field

The utility model belongs to the technical field of the coal chemical industry, concretely relates to propylene compressor unit dry gas seals process units.

Background

The dry gas sealing gas system of the propylene compressor is divided into primary sealing gas, secondary sealing gas and post-isolation gas. After the first-stage sealing gas enters the first-stage sealing cavity at the high-low pressure end of the compressor cylinder body, most of the first-stage sealing gas enters the compressor through a labyrinth to prevent the gas in the compressor from leaking outside, and a small amount of gas leaks to the first-stage sealing exhaust cavity through the sealing end face, so that the first-stage sealing gas and the compressor cavity must keep a certain pressure difference.

During normal operation, the primary seal gas source is compressor outlet propylene gas; in the driving process, the outlet pressure of the compressor is low, and medium-pressure nitrogen is used under the original design working condition. Thus, part of nitrogen enters the propylene system, and the inert gas content of the system is increased because the nitrogen cannot be compressed and condensed, so that the outlet pressure of the compressor is overhigh. In this case, the inert gas in the system needs to be exhausted, but when the inert gas is exhausted, part of propylene is exhausted together, so that the propylene loss of the system is caused, and the production cost of enterprises is increased; in addition, in order to prevent medium-pressure nitrogen from leaking inwards, a blind plate is generally arranged on a medium-pressure nitrogen pipeline and is in a blind position under normal conditions, the blind plate needs to be conducted in the process of emergency start and stop of the unit due to faults, and the normal operation of a medium-pressure nitrogen pipe network needs to be ensured during the period, so that the start and stop progress of the system is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a propylene compressor unit dry gas seals process units to solve the problem of the adverse effect that the propylene compressor one-level sealed gas of current driving operating mode down used nitrogen gas to cause the system.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a propylene compressor unit dry gas seals process units, includes the propylene storage tank, the lateral wall fixedly connected with gas transmission line of propylene storage tank, one side of propylene storage tank is equipped with the compressor, the one end and the compressor fixed connection of propylene storage tank are kept away from to the gas transmission line.

Preferably, the sealed one-level sealed gas house steward of outer top wall fixedly connected with dry gas of propylene storage tank, the one end of compressor is equipped with the air inlet, the one end that the air inlet was kept away from to the compressor is equipped with the gas outlet, the outer circumferential wall fixed mounting of the sealed one-level sealed gas house steward of dry gas has the hand valve, the sealed one-level sealed gas house steward of dry gas keeps away from the one end and the air inlet fixed connection of propylene storage tank.

Preferably, the gas pipeline is close to the circumference wall fixed mounting of propylene storage tank and has the gate valve, the circumference wall fixed mounting that the propylene storage tank was kept away from to the gas pipeline has the check valve, the one end and the gas outlet fixed connection that the propylene storage tank was kept away from to the gas pipeline.

Preferably, one end of the propylene storage tank, which is far away from the gas transmission pipeline, is fixedly connected with a propylene storage tank pipeline, and one side of the propylene storage tank pipeline, which is far away from the propylene storage tank, is fixedly connected with a gas inlet pipeline.

Preferably, one end of the dry gas sealing primary sealing gas main pipe extending to the propylene storage tank is fixedly connected with a venturi tube seat, and one side of the venturi tube seat far away from the dry gas sealing primary sealing gas main pipe is movably provided with a venturi tube.

Preferably, the outer bottom wall of the propylene storage tank is welded with a propylene storage tank supporting rod, one end of the propylene storage tank supporting rod, which is far away from the propylene storage tank, is fixedly connected with a propylene storage tank base, and the outer bottom wall of the compressor is fixedly provided with a compressor base.

Compared with the prior art, the utility model, following beneficial effect has:

(1) the utility model discloses a propylene storage tank top gaseous state propylene is as the sealed gas of the one-level of driving, and not only safe and reliable can also the problem of the non-condensable gas gathering of effectual reduction system, avoids the device to discharge non-condensable gas at the operation in-process, causes the extravagant problem of propylene to practice thrift manufacturing cost, be favorable to the use and the popularization of device.

(2) The utility model discloses an in-system propylene replaces middling pressure nitrogen gas as the sealed gas of one-level, can satisfy the condition of opening, does to avoid disturbing because of the external factor, can initiatively cause the effect of system's time delay of driving at the in-process of operation to the efficiency of lift system work has played the positive effect for production operation yield increase is imitated.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a process flow diagram of the present invention;

FIG. 3 is an enlarged view of the venturi of the present invention;

in the figure: 1. a propylene storage tank; 2. a non-return valve; 3. a gate valve; 4. an air intake line; 5. a propylene storage tank line; 6. a venturi; 7. the dry gas seals the primary sealed gas main pipe; 8. a hand valve; 9. a compressor; 10. an air inlet; 11. a compressor base; 12. a propylene storage tank support rod; 13. a propylene storage tank base; 14. a venturi tube seat; 15. an air outlet; 16. a low pressure nitrogen inlet; 17. a medium pressure nitrogen inlet; 18. primary seal gas; 19. propylene steam for starting; 20. a gas line.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides the following technical solutions: the utility model provides a propylene compressor unit dry gas seals process units, includes propylene storage tank 1, the lateral wall fixedly connected with gas pipeline 20 of propylene storage tank 1, and one side of propylene storage tank 1 is equipped with compressor 9, and the one end and the compressor 9 fixed connection of propylene storage tank 1 are kept away from to gas pipeline 20, and propylene storage tank 1 normal operating pressure is less than compressor 9 outlet pressure a little, the temperature is the normal atmospheric temperature, can avoid nitrogen gas to get into the propylene system through pressure differential.

Further, the outer top wall of the propylene storage tank 1 is fixedly connected with a dry gas sealing primary sealing gas main pipe 7, one end of the compressor 9 is provided with a gas inlet 10, one end of the compressor 9, which is far away from the gas inlet 10, is provided with a gas outlet 15, a hand valve 8 is fixedly installed on the outer circumferential wall of the dry gas sealing primary sealing gas main pipe 7, one end of the dry gas sealing primary sealing gas main pipe 7, which is far away from the propylene storage tank 1, is fixedly connected with the gas inlet 10, and the hand valve 8 can realize the open-stop operation of the dry gas sealing primary sealing gas main pipe 7.

Furthermore, a gate valve 3 is fixedly installed on the circumferential wall of the gas transmission line 20 close to the propylene storage tank 1, a check valve 2 is fixedly installed on the circumferential wall of the gas transmission line 20 far away from the propylene storage tank 1, one end of the gas transmission line 20 far away from the propylene storage tank 1 is fixedly connected with the gas outlet 15, the check valve 2 is arranged between the propylene storage tank 1 and the outlet of the compressor 9, the pressure of the outlet of the compressor 9 is reduced after the system is stopped, but the pressure of the propylene storage tank 1 can be maintained in an original state, so that the requirement of primary sealing gas supply can be met.

Furthermore, one end of the propylene storage tank 1, which is far away from the gas transmission pipeline 20, is fixedly connected with a propylene storage tank pipeline 5, one side of the propylene storage tank pipeline 5, which is far away from the propylene storage tank 1, is fixedly connected with a gas inlet pipeline 4, and the gas inlet pipeline 4 can input gaseous propylene which is used as primary sealing gas for starting.

Specifically, one end of the dry gas sealing primary sealing gas main pipe 7 extending to the propylene storage tank 1 is fixedly connected with a venturi tube seat 14, one side of the venturi tube seat 14 far away from the dry gas sealing primary sealing gas main pipe 7 is movably provided with a venturi tube 6, and the venturi tube 6 can increase the flowing speed of propylene.

It is worth to be noted that a propylene storage tank support rod 12 is welded to the outer bottom wall of the propylene storage tank 1, a propylene storage tank base 13 is fixedly connected to one end of the propylene storage tank support rod 12 far away from the propylene storage tank 1, and a compressor base 11 is fixedly installed on the outer bottom wall of the compressor 9.

The utility model discloses a theory of operation and use flow: before use, gaseous propylene as a primary seal gas 18 for starting is firstly input into the propylene storage tank 1 through the gas inlet pipeline 4 and the propylene storage tank pipeline 5, then respectively inputting low-pressure nitrogen from a low-pressure nitrogen inlet 16 and inputting medium-pressure nitrogen from a medium-pressure nitrogen inlet 17, then driving the system to start, and the propylene storage tank 1 is directly opened to ensure that the driving propylene steam 19 in the propylene storage tank 1 is extruded into the air inlet 10 through the hand valve 8 under the compression action of low-pressure nitrogen and medium-pressure nitrogen, the first-stage sealing gas 18 is cut to the compressor 9 after the standby group operates normally, then is output from an air outlet 15 through a compressor 9, and because a check valve 2 is arranged between a propylene storage tank 1 and the outlet of the compressor 9, after the system is stopped, the outlet pressure of the compressor 9 is reduced, but the pressure of the propylene storage tank 1 can be maintained through the action of the check valve 2, so that the requirement of the first-stage sealing gas supply can be met.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a propylene compressor unit dry gas seals process units, includes propylene storage tank (1), its characterized in that: the outer side wall of the propylene storage tank (1) is fixedly connected with a gas pipeline (20), one side of the propylene storage tank (1) is provided with a compressor (9), and one end, far away from the propylene storage tank (1), of the gas pipeline (20) is fixedly connected with the compressor (9).

2. The dry gas sealing process device of the propylene compressor unit as claimed in claim 1, wherein: the sealed one-level seal gas house steward (7) of outer top wall fixedly connected with dry gas of propylene storage tank (1), the one end of compressor (9) is equipped with air inlet (10), the one end that air inlet (10) were kept away from in compressor (9) is equipped with gas outlet (15), the outer periphery wall fixed mounting of the sealed one-level seal gas house steward (7) of dry gas has hand valve (8), the one end and air inlet (10) fixed connection of propylene storage tank (1) are kept away from in the sealed one-level seal gas house steward (7) of dry gas.

3. The dry gas sealing process device of the propylene compressor unit as claimed in claim 2, wherein: circumferential wall fixed mounting that gas line (20) are close to propylene storage tank (1) has gate valve (3), circumferential wall fixed mounting that propylene storage tank (1) was kept away from in gas line (20) has check valve (2), one end and gas outlet (15) fixed connection that propylene storage tank (1) was kept away from in gas line (20).

4. The dry gas sealing process device of the propylene compressor unit as claimed in claim 3, wherein: one end fixedly connected with propylene storage tank pipeline (5) of gas transmission line (20) are kept away from in propylene storage tank (1), one side fixedly connected with air inlet pipeline (4) of propylene storage tank (1) are kept away from in propylene storage tank pipeline (5).

5. The dry gas sealing process device of the propylene compressor unit as claimed in claim 4, wherein: one end of the dry gas sealing primary sealing gas main pipe (7) extending to the propylene storage tank (1) is fixedly connected with a venturi tube seat (14), and one side, far away from the dry gas sealing primary sealing gas main pipe (7), of the venturi tube seat (14) is movably provided with a venturi tube (6).

6. The dry gas sealing process device of the propylene compressor unit as claimed in claim 5, wherein: the outer diapire of propylene storage tank (1) is welded propylene storage tank bracing piece (12), the one end fixedly connected with propylene storage tank base (13) of propylene storage tank (1) is kept away from to propylene storage tank bracing piece (12), the outer diapire fixed mounting of compressor (9) has compressor base (11).