Buffer device for coal gasification high-pressure liquid material

Abstract

The embodiment of the utility model relates to the technical field of pressure relief buffering, in particular to a buffering device for coal gasification high-pressure liquid materials, which comprises a buffering tank arranged between a high-pressure flash tank and a pressure reducing valve. The inlet end of the buffer tank is provided with a ceramic pipe, the ceramic pipe is communicated with the pressure reducing valve, the ceramic pipe extends into the buffer tank, the outlet end of the buffer tank is communicated with the high-pressure flash tank, and the side, close to the outlet end, of the interior of the buffer tank is provided with a cast stone plate. The high-pressure flash tank has the beneficial effects that in actual use, a liquid material enters the buffer tank after being decompressed by the pressure reducing valve, and then enters the high-pressure flash tank, namely the impact force of the buffer tank on the liquid material is reduced, so that the abrasion condition of a pipeline is reduced, and the leakage frequency is reduced; according to the buffer tank, the cast stone plate is laid on the side, close to the outlet end, in the buffer tank, the buffer tank is protected through the cast stone plate, and therefore the buffer tank is prevented from being abraded by liquid materials.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure relief buffering, in particular to a buffering device for high-pressure liquid materials in coal gasification. Background Art

[0002] The working principle of the aerospace pulverized coal pressurized gasifier is that the qualified pulverized coal produced by the coal grinding system is pressurized and sprayed into the gasifier through the pulverized coal burner with oxygen and steam in the air. It fully reacts at a pressure of 4.0MPa and a high temperature of 1400-1700℃ to undergo a partial oxidation reaction to generate synthesis gas with hydrogen, carbon monoxide and carbon dioxide as the main components. After cooling, humidification and dust removal, it is sent to the downstream purification system; the liquid material with a pressure of 4.0MPa and a temperature of 218℃ from the gasifier quenching chamber is mixed with the liquid material with a temperature of 211.8℃ from the washing tower, and then decompressed by the pressure reducing valve and enters the high-pressure flash tank, so that the high-pressure flash tank is operated at a pressure of 0.5Mpa to separate the process gas dissolved in the water; this method is used to separate the gas dissolved in the liquid material, reduce the water temperature and recover heat;

[0003] However, in actual operation, the flow rate will increase due to the sudden drop in pressure, and the liquid material contains solid particles, which increases the wear of the pipeline between the pressure reducing valve and the high-pressure flash tank, easily causing frequent leakage of the pipeline between the two, seriously affecting normal operation.

[0004] Therefore, a buffer device for high-pressure liquid materials in coal gasification is needed to overcome the occurrence of the above problems. Utility Model Content

[0005] In order to solve the above problems, an embodiment of the utility model provides a buffer device for high-pressure liquid materials in coal gasification, by adding a set of buffer devices between the pressure reducing valve and the high-pressure flash tank to reduce the impact force of the liquid material, thereby achieving the purpose of solving the problems raised in the background technology.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model specifically adopts the following technical scheme: a buffer device for high-pressure liquid materials in coal gasification, comprising a buffer tank arranged between a high-pressure flash tank and a pressure reducing valve; a ceramic tube is arranged at the inlet end of the buffer tank, the ceramic tube is connected with the pressure reducing valve, the ceramic tube extends into the interior of the buffer tank, the outlet end of the buffer tank is connected with the high-pressure flash tank, and a cast stone plate is arranged on one side of the interior of the buffer tank close to the outlet end.

[0007] As a further improvement of the above technical solution:

[0008] The inlet end of the buffer tank is provided with a spherical joint, and the ceramic tube is provided with two flanges, one of the flanges on the ceramic tube is connected to the pressure reducing valve, and the other flange on the ceramic tube is connected to the spherical joint.

[0009] A manhole is arranged on the buffer tank.

[0010] The level of the inlet end of the buffer tank is lower than the level of the outlet end of the buffer tank.

[0011] The beneficial effects of the embodiments of the utility model are:

[0012] In actual use, after the liquid material is decompressed by the pressure reducing valve, it enters the buffer tank and then enters the interior of the high-pressure flash tank, that is, the impact force of the liquid material is reduced by the buffer tank, thereby reducing the wear of the pipeline and reducing the leakage frequency; due to the impact of the liquid material after entering the buffer tank and the flow of the liquid material when it is discharged from the outlet end, the wear of the buffer tank by the liquid material is mainly concentrated on the side of the buffer tank near the outlet end. In this application, a cast stone plate is laid on the side of the buffer tank near the outlet end to protect the buffer tank by the cast stone plate, thereby preventing the liquid material from causing wear to the buffer tank;

[0013] In actual operation, due to limited on-site location, the pressure reducing valve often needs to be sunk. Traditional pipeline wear and leakage points are concentrated at 300-400mm from the pressure reducing valve outlet. Therefore, a 450mm ceramic tube is added at the outlet of the pressure reducing valve. The ceramic tube has good wear resistance and absorbs the impact of liquid materials through the ceramic tube, thereby reducing the impact of liquid materials on the buffer tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a cross-sectional schematic diagram of the buffer tank of the utility model from a first viewing angle;

[0016] Figure 3 It is a cross-sectional schematic diagram of the buffer tank of the utility model from a second viewing angle;

[0017] Figure 4 It is a structural schematic diagram of the ceramic tube of the utility model.

[0018] In the figure: 1. buffer tank; 2. high-pressure flash tank; 3. pressure reducing valve; 4. ceramic tube; 5. cast stone plate; 6. ball joint; 7. manhole. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0020] See also Figures 1 to 4, the embodiment of the utility model discloses a buffer device for high-pressure liquid materials for coal gasification, comprising a buffer tank 1 arranged between a high-pressure flash tank 2 and a pressure reducing valve 3;

[0021] The inlet end of the buffer tank 1 is provided with a ceramic tube 4, which is connected to the pressure reducing valve 3 and extends into the interior of the buffer tank 1. The outlet end of the buffer tank 1 is connected to the high-pressure flash tank 2. A cast stone plate 5 is provided on one side of the interior of the buffer tank 1 near the outlet end.

[0022] In actual use, after the liquid material is depressurized by the pressure reducing valve 3, it enters the buffer tank 1 and then enters the interior of the high-pressure flash tank 2, that is, the impact force of the liquid material is reduced by the buffer tank 1, thereby reducing the wear of the pipeline and reducing the leakage frequency; due to the impact of the liquid material after entering the buffer tank 1 and the flow of the liquid material when it is discharged from the outlet end, the wear of the liquid material on the buffer tank 1 is mainly concentrated on the side of the buffer tank 1 near the outlet end. In this application, a cast stone plate 5 is laid on the side of the buffer tank 1 near the outlet end, and the cast stone plate 5 is used to protect the buffer tank 1, thereby preventing the liquid material from causing wear to the buffer tank 1;

[0023] In actual operation, due to limited on-site location, the pressure reducing valve 3 often needs to be sunk. Traditional pipeline wear and leakage points are concentrated at 300-400mm from the outlet of the pressure reducing valve 3. Therefore, a 450mm ceramic tube 4 is added at the outlet of the pressure reducing valve 3. The ceramic tube 4 has good wear resistance and absorbs the impact of the liquid material through the ceramic tube 4, thereby reducing the impact of the liquid material on the buffer tank 1.

[0024] As a further illustration of this application:

[0025] A spherical joint 6 is provided at the inlet end of the buffer tank 1, and two flanges are provided on the ceramic tube 4, one of the flanges on the ceramic tube 4 is connected to the pressure reducing valve 3, and the other flange on the ceramic tube 4 is connected to the spherical joint 6;

[0026] Since the ceramic tube 4 needs to absorb the impact of the liquid material, the ceramic tube 4 needs to be replaced regularly. When replacing the ceramic tube 4, since the position of the pressure reducing valve 3 and the position of the high-pressure flash tank 2 are fixed, that is, the distance between the two is fixed, and since the ceramic tube 4 is inserted into the interior of the buffer tank 1, the ceramic tube 4 is difficult to replace. The present application sets a spherical joint 6 at the inlet end of the buffer tank 1. When replacing the ceramic tube 4, firstly disconnect the flange connected between the ceramic tube 4 and the pressure reducing valve 3, and then rotate the spherical joint 6 to tilt the ceramic tube 4, that is, stagger the positions of the ceramic tube 4 and the pressure reducing valve 3. At this time, disconnect the flange between the ceramic tube 4 and the spherical joint 6, and then remove the ceramic tube 4 from the spherical joint 6, and then replace it with a new spherical joint 6;

[0027] In actual operation, in order to avoid interference between the end of the ceramic tube 4 and the pressure reducing valve 3 when the spherical joint 6 is rotated, the flange between the ceramic tube 4 and the spherical joint 6 can be disconnected first, and the gasket at the flange connection can be removed. Then, the flange connected between the ceramic tube 4 and the pressure reducing valve 3 can be disconnected, and the ceramic tube 4 can be pushed to one side of the spherical joint 6, so that there is a sufficient distance between one end of the ceramic tube 4 and the pressure reducing valve 3, thereby avoiding interference between the end of the ceramic tube 4 and the pressure reducing valve 3 when the spherical joint 6 is rotated.

[0028] As a further illustration of this application:

[0029] A manhole 7 is provided on the buffer tank 1, and a worker can replace the cast stone plate 5 through the manhole 7. The cast stone plate 5 can be fixed inside the buffer tank 1 by means of clamping, bolting, gluing, etc.

[0030] As a further illustration of this application:

[0031] The level of the inlet end of the buffer tank 1 is lower than the level of the outlet end of the buffer tank 1, so that a certain height of liquid level is formed inside the buffer tank 1, and the liquid covers the inlet end of the buffer tank 1, thereby buffering the liquid material entering from the inlet end and reducing the impact force of the liquid material.

[0032] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0035] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A buffer device for high-pressure liquid materials in coal gasification, characterized in that: It comprises a buffer tank (1) arranged between a high-pressure flash tank (2) and a pressure reducing valve (3); The inlet end of the buffer tank (1) is provided with a ceramic tube (4), the ceramic tube (4) is connected to the pressure reducing valve (3), the ceramic tube (4) extends into the interior of the buffer tank (1), the outlet end of the buffer tank (1) is connected to the high-pressure flash tank (2), and a cast stone plate (5) is provided on one side of the interior of the buffer tank (1) close to the outlet end.

2. The buffer device for high-pressure liquid materials in coal gasification according to claim 1, characterized in that: The inlet end of the buffer tank (1) is provided with a spherical joint (6), and the ceramic tube (4) is provided with two flanges, one of the flanges on the ceramic tube (4) is connected to the pressure reducing valve (3), and the other flange on the ceramic tube (4) is connected to the spherical joint (6).

3. The buffer device for high-pressure liquid materials in coal gasification according to claim 1, characterized in that: The buffer tank (1) is provided with a manhole (7).

4. The buffer device for high-pressure liquid materials for coal gasification according to claim 1, characterized in that: The horizontal height of the inlet end of the buffer tank (1) is lower than the horizontal height of the outlet end of the buffer tank (1).

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