CN218954127U

CN218954127U - Improved spring type safety valve applied to coal water slurry gasification system

Info

Publication number: CN218954127U
Application number: CN202222961946.7U
Authority: CN
Inventors: 胡安琦; 蒋磊
Original assignee: Anhui Liuguo Chemical Industry Co Ltd
Current assignee: Anhui Liuguo Chemical Industry Co Ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-05-02
Anticipated expiration: 2032-11-07

Abstract

The utility model discloses an improved spring type safety valve applied to a coal water slurry gasification system, wherein one end of a safety valve body is opened and communicated with an air inlet pipe, the opening of the side wall of the safety valve body is communicated with an air outlet pipe, a valve clack and a guide plate which are arranged in parallel are coaxially arranged on a valve rod of the safety valve, the valve clack and the guide plate are in sliding fit with a valve cavity, the distance between the valve clack and the guide plate is larger than the diameter of the opening at the air outlet pipe, the guide plate and the valve wall of the safety valve are enclosed to form a closed compression cavity, the compression cavity is communicated with an external air source, and an elastic piece for applying elastic force to the guide plate along the length direction of the valve rod is arranged in the compression cavity. The utility model avoids the spring from being excessively compressed, effectively protects the spring of the spring type safety valve, avoids the spring from being damaged in an ultrahigh pressure environment, and improves the safety of the gasification system in the operation process.

Description

Improved spring type safety valve applied to coal water slurry gasification system

Technical Field

The utility model relates to the field of chemical industry, in particular to an improved spring type safety valve applied to a coal water slurry gasification system.

Background

The Texaco coal water slurry gasification system is characterized in that a spring type safety valve is arranged on a synthesis gas pipeline at the outlet of a carbon scrubber, and once an overpressure condition occurs, the safety valve can timely take off to safely operate a protection device.

In the actual use process, as the safety valve is always in an ultrahigh pressure environment, the pressure relief under the ultrahigh pressure environment can lead to the excessive compression of the spring due to the limitation of the pressure bearing range of the spring, so that the spring type safety valve is damaged and fails, the leakage condition of the safety valve is very easy to occur in the past for a long time, the synthetic gas is wasted, and the safety risk in the system operation process is high, so that the problem needs to be solved.

Disclosure of Invention

In order to avoid and overcome the technical problems in the prior art, the utility model provides an improved spring type safety valve applied to a coal water slurry gasification system. The utility model effectively protects the spring of the spring type safety valve, avoids damage of the spring type safety valve in an ultrahigh pressure environment, and improves the safety of the gasification system in the operation process.

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

be applied to improved generation spring relief valve among the coal slurry gasification system, the one end opening and the intake pipe intercommunication of relief valve body, relief valve body lateral wall opening and outlet duct intercommunication, coaxial valve clack and the deflector that is provided with each other parallel arrangement on the valve rod of relief valve, valve clack and deflector all with valve pocket sliding fit and the distance between valve clack and the deflector are greater than the opening diameter of outlet duct department, the deflector encloses with the valve wall of relief valve and forms inclosed compression chamber, compression chamber and external air supply intercommunication, be provided with the elastic component of applying along valve rod length direction elastic force to the deflector in the compression chamber.

As a further scheme of the utility model: the external gas source is a low-pressure nitrogen pipeline in the coal water slurry gasification system, and the low-pressure nitrogen pipeline is communicated with the compression cavity through the drainage tube.

As still further aspects of the utility model: a hand valve is arranged on the drainage tube to control the turn-off of the drainage tube.

As still further aspects of the utility model: the valve rod is arranged along the axial direction of the air inlet pipe, the elastic piece is a spring sleeved on the valve rod, one end of the spring is fixed on the valve wall of the safety valve, and the other end of the spring is in butt joint with the guide plate.

As still further aspects of the utility model: the valve body of the safety valve is provided with a pressure relief opening communicated with the compression cavity.

As still further aspects of the utility model: the valve cavity of the safety valve is internally provided with two groups of annular limiting protrusions which are arranged in parallel, the two limiting protrusions and the guide plate are coaxially arranged, the guide plate is positioned between the two limiting protrusions, and the movement track of the guide plate is avoided from the pipe orifice position of the air outlet pipe.

As still further aspects of the utility model: sealing rings are arranged at the contact surfaces of the valve clack, the guide plate and the valve cavity of the safety valve.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the guide plate which is arranged in parallel with the valve clack is arranged on the valve rod of the safety valve, the compression cavity formed by enclosing the guide plate and the valve cavity is communicated with an external air source, when the synthetic air pipeline of the coal water slurry gasification system is decompressed through the safety valve, the valve clack, the valve rod and the guide plate synchronously move upwards, the space of the compression cavity is further compressed, so that a buffer force towards the valve clack direction is applied to the guide plate, the spring is prevented from being excessively compressed, the spring of the spring type safety valve is effectively protected, the spring type safety valve is prevented from being damaged in an ultrahigh pressure environment, and the safety of the gasification system in the operation process is improved.

2. The external air source is a low-pressure nitrogen pipeline in the coal water slurry gasification system, nitrogen is taken as inactive gas, can be compressed, does not generate risk when being compressed, does not need to introduce an external air source, and can effectively protect the spring of the safety valve by utilizing the pipeline in the system; meanwhile, the arrangement of the upper hand valve of the drainage tube can shut off the flow of nitrogen at any time, so that the maintenance or replacement of the later-stage safety valve is facilitated.

3. According to the utility model, the pressure relief opening communicated with the compression cavity is arranged on the valve body, so that the excessive high pressure of nitrogen in the compression cavity can be avoided, and the safety of the safety valve is improved by timely pressure relief; the sealing performance of the valve body is further improved due to the arrangement of the sealing rings on the valve clack and the guide plate.

4. According to the utility model, the two groups of limiting protrusions are convexly arranged in the valve cavity, so that the movable range of the guide plate is limited, the potential safety hazard caused by the communication between the compression cavity and the air outlet pipe is prevented, and meanwhile, the maximum compression stroke of the spring is limited due to the existence of the limiting protrusions, and the limiting protrusions are matched with low-pressure nitrogen to form double protection on the spring.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure:

1. a safety valve; 11. an air inlet pipe; 12. an air outlet pipe; 13. a valve flap;

14. a guide plate; 15. an elastic member; 16. a valve stem; 17. a pressure relief port;

18. a limit protrusion; 19. a compression chamber;

2. a drainage tube; 21. and a hand 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.

Referring to fig. 1, in an embodiment of the present utility model, an improved spring-type safety valve for a coal water slurry gasification system is provided, the safety valve 1 is installed on a synthesis gas pipeline at an outlet of a carbon scrubber in the coal water slurry gasification system, one end of a valve body of the safety valve 1 is opened, the opening is communicated with an air inlet pipe 11, and the other end of the air inlet pipe 11 is communicated with the synthesis gas pipeline. The side wall of the safety valve 1 is provided with an opening which is communicated with an air outlet pipe 12, and the air outlet pipe 12 is vertically arranged with an air inlet pipe 11.

A valve rod 16 coaxially arranged with the valve cavity is arranged in the valve cavity of the safety valve 1, a valve clack 13 of the safety valve 1 is fixed at the rod end of the valve rod 16, and the other end of the valve rod 16 extends to a sealing section in the valve cavity. The valve clack 13 is in sliding fit with the valve cavity of the safety valve 1, and can block the air inlet pipe 11 and the air outlet pipe 12 or enable the air inlet pipe 11 and the air outlet pipe 12 to be communicated when sliding.

The valve rod 16 is also coaxially provided with a guide plate 14 which is arranged in parallel with the valve clack 13, the guide plate 14 is in sliding fit with the valve cavity, and encloses a sealed compression cavity 19 with a valve arm of the safety valve 1, the compression cavity 19 is positioned at the top of the safety valve 1, and the air inlet pipe 11 is positioned at the bottom of the safety valve 1.

O-shaped sealing rings are arranged at the contact surfaces of the guide plate 14 and the valve clack 13 and the valve cavity. The distance between the guide plate 14 and the valve clack 13 is larger than the diameter of the pipe orifice of the air outlet pipe 12.

Two groups of annular limiting protrusions 18 which are arranged in parallel are convexly arranged in the valve cavity of the safety valve 1 above the air outlet pipe 12, and the guide plate 14 can only move between the two limiting protrusions 18 along with the valve rod 16, so that the compression cavity 19 is prevented from being communicated with the air outlet pipe 12.

A spring as an elastic member 15 is fitted around the stem of the valve stem 16, and one end of the spring abuts against the wall of the safety valve 1 and the other end abuts against the body of the guide plate 14, thereby applying an elastic force to the guide plate 14 in the direction toward the intake pipe 11.

In order to protect the spring, the compression cavity 19 is communicated with a low-pressure nitrogen pipeline through the drainage tube 2, and a hand valve 21 is arranged on the drainage tube 2 to control the shutoff of the drainage tube 2. When the safety valve 1 is in pressure relief, the guide plate 14 moves upwards along with the valve clack 13, nitrogen in the compression cavity 19 is compressed, so that downward buffering force is applied to the guide plate 14, and the spring is prevented from being compressed in a transitional mode.

In order to prevent the pressure in the compression chamber 19 from being too high, the valve body of the safety valve 1 is also provided with a pressure relief port 17 communicated with the compression chamber 19.

The basic principles of the present application have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not limiting, and these advantages, benefits, effects, etc. are not to be considered as necessarily possessed by the various embodiments of the present application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not intended to be limited to the details disclosed herein as such.

The block diagrams of the devices, apparatuses, devices, systems referred to in this application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent to the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims

1. The utility model provides an improved generation spring relief valve for among coal water slurry gasification system, a serial communication port, the wherein one end opening of relief valve (1) valve body and opening and intake pipe (11) intercommunication, relief valve (1) valve body lateral wall opening and outlet duct (12) intercommunication, be provided with valve clack (13) and deflector (14) of each other parallel arrangement on valve rod (16) of relief valve (1) coaxially, valve clack (13) and deflector (14) all with valve pocket sliding fit and the distance between valve clack (13) and deflector (14) is greater than the opening diameter of outlet duct (12) department, deflector (14) and the valve wall enclosure of relief valve (1) form airtight compression chamber (19), compression chamber (19) and external air supply intercommunication, be provided with in compression chamber (19) and apply along elastic component (15) of valve rod (16) length direction elastic force to deflector (14).

2. The improved spring type safety valve applied to the coal water slurry gasification system according to claim 1, wherein the external gas source is a low-pressure nitrogen pipeline in the coal water slurry gasification system, and the low-pressure nitrogen pipeline is communicated with the compression cavity (19) through the drainage tube (2).

3. An improved spring-type safety valve for use in a coal water slurry gasification system according to claim 2, wherein a hand valve (21) is provided on the draft tube (2) to control the turn-off of the draft tube (2).

4. An improved spring type safety valve applied to a coal water slurry gasification system according to any one of claims 1 to 3, wherein the valve rod (16) is arranged along the axial direction of the air inlet pipe (11), the elastic member (15) is a spring sleeved on the valve rod (16), one end of the spring is fixed on the valve wall of the safety valve (1), and the other end of the spring is abutted against the guide plate (14).

5. An improved spring type safety valve applied to a water coal slurry gasification system according to any one of claims 1 to 3, wherein a pressure relief port (17) communicated with a compression cavity (19) is arranged on a valve body of the safety valve (1).

6. An improved spring type safety valve applied to a coal water slurry gasification system according to any one of claims 1 to 3, wherein two groups of annular limiting protrusions (18) which are arranged in parallel are convexly arranged in a valve cavity of the safety valve (1), the two limiting protrusions (18) and the guide plate (14) are coaxially arranged, the guide plate (14) is positioned between the two limiting protrusions (18), and the movement track of the guide plate (14) is avoided from the position of a pipe orifice of the air outlet pipe (12).

7. An improved spring type safety valve applied to a coal water slurry gasification system according to any one of claims 1 to 3, wherein sealing rings are arranged at contact surfaces of the valve clack (13) and the guide plate (14) with a valve cavity of the safety valve (1).