Noise reduction blind plate, using method thereof and emptying pipeline comprising noise reduction blind plate

Abstract

The invention provides a noise reduction blind plate and a using method thereof and an emptying pipeline comprising the noise reduction blind plate, the noise reduction blind plate is installed on a synthesis gas emptying pipeline behind a coal gasification scrubber tower, the noise reduction blind plate comprises a noise reduction pore plate, the noise reduction pore plate comprises a plurality of noise reduction holes formed in the center of the noise reduction pore plate, and the noise reduction holes are communicated with the noise reduction pore plate. The noise reduction pore plate is used for limiting the flow of a medium in the emptying pipeline or reducing sudden pressure change of the medium in the emptying pipeline, and the noise reduction pore plate sealing surface is arranged on the edge of the noise reduction pore plate; and the blind plate comprises a blind plate sealing face arranged on the edge of the blind plate, the blind plate is used for blocking flowing of a medium in the emptying pipeline, and the noise reduction hole plate and the blind plate are installed at the same site of the emptying pipeline. The synthesis gas emptying pipeline can be arranged in the compact gasification frame under the condition that large-scale transformation is not carried out, so that the number of pipe fittings used on the device pipeline is reduced by three, the flange welding amount and the installation workload during construction are reduced, meanwhile, a potential leakage point is also eliminated, and the production efficiency is improved. And a reference scheme is provided for technical upgrading of devices of the same type.

Description

Technical Field

[0001] The present invention relates to the technical field of process noise reduction, and in particular to a noise reduction blind plate, a use method thereof, and a venting pipeline comprising the same. Background Art

[0002] In the process of coal gasification, in order to cope with the sudden decrease in the ability of the downstream unit of the gasification process to receive synthesis gas, the synthesis gas venting pipeline is usually set at the outlet of the scrubber. There are automatic control valves with noise reduction orifices and 8-shaped blind plates on the safety venting pipeline. The noise reduction orifice plate is applied to the venting automatic control valve on the large-diameter venting pipeline of the process device. It can limit the flow of the process medium through the automatic control venting valve, increase the pressure after the venting automatic control valve, reduce the sudden change of the venting pipeline pressure on the valve, and can also adjust the flow form of the process medium in the venting pipeline, ultimately achieving the purpose of reducing the noise and vibration of the device; the 8-shaped blind plate is also usually used on large-diameter venting pipelines. The diameter end is usually used to occupy the spacing to keep the pipeline unobstructed. When the device needs to be isolated during shutdown and maintenance, the blind plate of the same thickness at the other end is replaced to cut off the pipeline for isolation of the device.

[0003] In the actual device venting pipeline layout, there is usually a need to set both a noise reduction orifice plate and an 8-shaped blind plate behind the automatic control valve of the safety venting pipeline. The noise reduction orifice plate is arranged after the pipe diameter diffusion section of the automatic control valve, and two large-diameter flanges are required to install the noise reduction orifice plate. The 8-shaped blind plate is arranged after the noise orifice plate, and two large-diameter flanges are also required to install it. Due to the large diameter of the synthesis gas venting pipeline, the volume of the above equipment is huge, which makes it difficult to arrange it in the compact gasification device required by the owner. Not only that, the investment in the venting pipeline of this design is relatively large, and it also puts forward higher requirements for the layout and construction of the venting pipeline. At the same time, the connection surface of the large-diameter flange also increases the potential risk of leakage. Summary of the invention

[0004] In view of this, the present invention provides a noise reduction blind plate, a method for using the same, and a venting pipeline comprising the same, which solves the disadvantages in the prior art that the synthesis gas venting pipeline is difficult to arrange in a compact gasification device, and the noise reduction orifice plate is arranged behind the valve pipe diameter diffusion section, and two large-diameter flanges are required to install the noise reduction orifice plate. The 8-shaped blind plate is arranged behind the noise reduction orifice plate, and two large-diameter flanges are also required to install it, which leads to a large investment in this part of the venting pipeline. At the same time, the connection surface of the large-diameter flange also increases the potential leakage risk. Technical problems.

[0005] According to the first aspect of the present invention, the present invention provides a noise reduction blind plate, which is installed on the synthesis gas venting pipeline after the coal gasification scrubber, and the venting pipeline is installed with a venting automatic control valve and a manual switch valve, and the installation position of the noise reduction blind plate is located between the venting automatic control valve and the manual switch valve, and the noise reduction blind plate includes: a noise reduction orifice plate, the noise reduction orifice plate includes a plurality of noise reduction holes opened in the center of the noise reduction orifice plate, the noise reduction holes are used to limit the flow of the medium in the venting pipeline or reduce the pressure mutation of the medium in the venting pipeline, and a noise reduction orifice plate sealing surface arranged at the edge of the noise reduction orifice plate; a blind plate, the blind plate includes a blind plate sealing surface arranged at the edge of the blind plate, and the blind plate is used to block the flow of the medium in the venting pipeline; wherein the thickness of the blind plate sealing surface is the same as the thickness of the noise reduction orifice plate sealing surface; the noise reduction orifice plate and the blind plate are installed at the same position of the venting pipeline.

[0006] In a possible implementation, the noise reduction blind plate further includes a flange, and the noise reduction orifice plate sealing surface of the noise reduction orifice plate and the blind plate sealing surface of the blind plate are sealingly connected to the flange.

[0007] In a possible implementation, the noise reduction blind plate further includes a fastener, and the fastener fixes the noise reduction orifice plate and the blind plate to the vent pipeline.

[0008] In a possible implementation, the noise reduction blind plate further includes a gasket, which is disposed at a connection between the flange and the noise reduction orifice plate sealing surface of the noise reduction orifice plate and the blind plate sealing surface of the blind plate.

[0009] In a possible implementation, the gasket is made of a graphite wound gasket.

[0010] In a possible implementation, a reducing pipe is also installed on the vent pipeline. The reducing pipe is installed on the side of the vent automatic control valve close to the noise reduction blind plate. One end of the reducing pipe is connected to the vent automatic control valve, and the other end of the reducing pipe is connected to the vent pipeline.

[0011] In a possible implementation, the noise reduction blind plate further includes: a connecting plate, one end of which is fixedly connected to the noise reduction hole plate, and the other end of which is fixedly connected to the blind plate;

[0012] According to a second aspect of the present invention, the present invention provides a venting pipeline of a coal gasification washing tower, on which a noise reduction blind plate as described above is provided, and the noise reduction blind plate includes a noise reduction orifice plate and a blind plate, and the noise reduction orifice plate and the blind plate are installed at the same position between the venting automatic control valve and the manual switch valve.

[0013] According to the third aspect of the present invention, the present invention provides a method for using the noise reduction blind plate described above. When the coal gasification scrubbing tower device is operating normally, the noise reduction orifice plate end of the noise reduction blind plate is installed on the vent pipeline to reduce the noise and vibration of the device; when the device needs to be isolated, the noise reduction orifice plate end is removed, and the blind plate end of the noise reduction blind plate is installed to cut off the vent pipeline.

[0014] In a possible implementation, when the diameter of the vent line is above DN200, no connecting plate is provided between the noise reduction orifice plate and the blind plate; when the diameter of the vent line is below DN200, a connecting plate is provided between the noise reduction orifice plate and the blind plate.

[0015] The present invention provides a noise reduction blind plate, a method for using the same, and a venting pipeline containing the same. The noise reduction blind plate is installed on a synthetic gas venting pipeline after a coal gasification scrubber. A venting automatic control valve and a manual switch valve are installed on the venting pipeline. The installation position of the noise reduction blind plate is located between the venting automatic control valve and the manual switch valve. The noise reduction blind plate comprises: a noise reduction orifice plate, the noise reduction orifice plate comprises a plurality of noise reduction holes opened in the center of the noise reduction orifice plate, the noise reduction holes are used to limit the flow of a medium in the venting pipeline or reduce a sudden pressure change of the medium in the venting pipeline, and a noise reduction orifice plate sealing surface arranged at the edge of the noise reduction orifice plate; a blind plate, the blind plate comprises a blind plate sealing surface arranged at the edge of the blind plate, the blind plate is used to block the flow of the medium in the venting pipeline; wherein the thickness of the blind plate sealing surface is the same as the thickness of the noise reduction orifice plate sealing surface; the noise reduction orifice plate and the blind plate are installed at the same position of the venting pipeline. The present invention installs the noise reduction orifice plate and the blind plate at the same position of the venting pipeline, so that the synthesis gas venting pipeline can be arranged in a compact gasification device, and the number of pipe fittings used in the device pipeline is reduced by 3, thereby reducing the investment in this part of the device, reducing the flange welding amount and installation workload during construction, and also eliminating a potential leakage point. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the structure of a noise reduction blind plate provided by an embodiment of the present invention;

[0017] Figure 2 The figure shows a side view of the connection between the noise reduction blind plate and the flange provided by one embodiment of the present invention;

[0018] Figure 3 The figure shows a schematic diagram of the connection between the noise reduction blind plate and the flange provided by one embodiment of the present invention;

[0019] Figure 4 The figure is a schematic structural diagram of a noise reduction blind plate provided by another embodiment of the present invention;

[0020] Figure 5Shown is a schematic diagram of the installation structure of a noise reduction blind plate provided in one embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Noise reduction blind plate; 11. Noise reduction orifice plate; 111. Noise reduction hole; 112. Noise reduction orifice plate sealing surface; 12. Blind plate; 121. Blind plate sealing surface; 13. Connecting plate;

[0023] 2. Flange; 3. Fasteners; 4. Gasket; 5. Automatic control valve; 6. Reducing pipe; 7. Manual switch valve; 8. Vent pipeline. DETAILED DESCRIPTION

[0024] In the description of the present invention, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present invention, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0025] In addition, reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In order to cope with the sudden decrease in the ability of the downstream unit of the coal gasification process to receive synthesis gas, the synthesis gas venting pipeline is usually set at the outlet of the scrubber. There are automatic control valves with noise reduction orifice plates and 8-shaped blind plates on the safety venting pipeline. The noise reduction orifice plate is mostly used after the diffusion section of the venting automatic control valve on the large-diameter venting pipeline of the process device. The installation of the noise reduction orifice plate can increase the pressure after the valve and reduce the sudden change of the venting pipeline pressure on the valve. It can also adjust the flow form of the process medium in the venting pipeline, and finally achieve the purpose of reducing the noise and vibration of the device; the 8-shaped blind plate is usually installed behind the noise reduction orifice plate. The gasket end is usually used to occupy the position to keep the pipeline unobstructed. When the isolation device is needed, the blind plate end of the same thickness at the other end is replaced to cut off the pipeline to isolate the device. In the layout of the synthesis gas venting pipeline, the noise reduction orifice plate and the 8-shaped blind plate will be set at the same time after the vent valve of the large-diameter venting pipeline. The noise reduction orifice plate is arranged after the diffusion section of the valve vent valve pipe diameter. The 8-shaped blind plate is arranged behind the noise reduction orifice plate and is also installed by clamping two large-diameter flanges. These devices are large in size and have high procurement and construction costs, resulting in a large space occupation and investment for this part of the venting pipeline, and also puts forward high requirements for the layout and construction of the venting pipeline. At the same time, the connection surface of the large-diameter flange has a potential leakage risk because both the noise reduction orifice plate and the 8-shaped blind plate need to be connected with the flange to form a connection surface. Therefore, in order to reduce the investment in the device and facilitate the layout and construction of the pipeline, the noise reduction orifice plate and the blind plate are combined into one component, so that the synthesis gas venting pipeline can be arranged in a compact gasification device, and the venting pipeline can reduce one layout content during design.

[0028] Figure 1 The figure is a schematic diagram of the structure of a noise reduction blind plate provided by an embodiment of the present invention; Figure 4 The figure is a schematic structural diagram of a noise reduction blind plate provided by another embodiment of the present invention; Figure 5 FIG. 1 is a schematic diagram of the installation structure of a noise reduction blind plate provided by an embodiment of the present invention; Figure 1 As shown, combined Figure 4 as well as Figure 5The noise reduction blind plate 1 is installed on the syngas venting pipeline 8 after the coal gasification scrubber. The venting pipeline 8 is installed with a venting automatic control valve 5 and a manual switch valve 7. The venting automatic control valve 5 and the manual switch valve 7 are arranged in sequence along the flow direction of the syngas. The installation position of the noise reduction blind plate 1 is located between the venting automatic control valve 5 and the manual switch valve 7. The noise reduction blind plate 1 includes: a noise reduction orifice plate 11, and the noise reduction orifice plate 11 includes a plurality of noise reduction holes 111 opened in the center of the noise reduction orifice plate 11. The noise reduction holes 111 are used to limit the flow rate of the medium in the venting pipeline 8 or reduce the medium in the venting pipeline 8. a sudden pressure change, and a noise reduction orifice sealing surface 112 arranged on the edge of the noise reduction orifice 11; a blind plate 12, the blind plate 12 includes a blind plate sealing surface 121 arranged on the edge of the blind plate 12, and the blind plate 12 is used to block the flow of the medium in the venting pipeline 8; a connecting plate 13, one end of the connecting plate 13 is fixedly connected to the noise reduction orifice 11, and the other end of the connecting plate 13 is fixedly connected to the blind plate 12; wherein the thickness of the blind plate sealing surface 121 is the same as the thickness of the noise reduction orifice sealing surface 112; the noise reduction orifice 11 and the blind plate 12 are installed at the same position of the venting pipeline 8. By installing the noise reduction orifice and the blind plate at the same position of the vent pipeline 8, the synthesis gas vent pipeline can be arranged in a compact gasification device, and the number of pipe fittings used in the device pipeline is reduced by 3. Specifically, the noise reduction orifice 11 and the two flanges connected to the noise reduction orifice 11 on the vent pipeline 8 are reduced, which reduces the investment in this part of the device, reduces the flange welding amount and installation workload during construction, and also eliminates one potential leakage point, and also provides a reference solution for the technical upgrade of the same type of device.

[0029] In a possible implementation, the noise reduction blind plate 1 also includes a flange 2, and the noise reduction orifice sealing surface 112 of the noise reduction orifice 11 and the blind plate sealing surface 121 of the blind plate 12 are sealed and connected to the flange 2. Specifically, the flange 2 is used for connection between pipe ends, and the flange 2 is used to fix the noise reduction orifice 11 or the blind plate 12 to the venting pipeline 8. In the specific construction and installation process, the two ends of the noise reduction orifice sealing surface 112 are first aligned with the flange, and then the flange is aligned with the venting pipeline 8 for installation. In the compact gasification device, the length of the automatic control valve 5 to the 8-shaped blind plate is within 5 meters. If the noise reduction orifice and the 8-shaped blind plate are set within 5 meters at the same time, not only the investment is large, but also higher requirements are put forward for the layout and construction of the venting pipeline. At the same time, two connection surfaces are formed, so that The vent pipeline has a potential risk of leakage. The present invention combines the noise reduction orifice 11 and the blind plate 12 into one component, which can reduce the space occupied by the vent pipeline and reduce one layout content in the design of the vent pipeline, thereby improving the flexibility of the vent pipeline layout, while also reducing the number of pipe fittings used, reducing the investment in this part of the device, and reducing the flange welding amount and installation workload during construction. Since the noise reduction orifice 11 and the blind plate 12 are combined into one component, only one pipe fitting needs to be installed during the construction process, eliminating one potential leakage point.

[0030] Figure 2 The figure shows a side view of the connection between the noise reduction blind plate and the flange provided by one embodiment of the present invention; Figure 3 FIG. 1 is a schematic diagram showing the connection between a noise reduction blind plate and a flange provided in one embodiment of the present invention; Figure 2-3 As shown, the noise reduction blind plate 1 also includes a fastener 3, which fixes the noise reduction orifice plate 11 and the blind plate 12 on the vent pipeline 8. In this embodiment, the fastener 3 can be a full-thread stud and nut, which fixes the noise reduction orifice plate 11 and the blind plate 12 on the vent pipeline 8.

[0031] In a possible implementation, the noise reduction blind plate 1 also includes a gasket 4, which is arranged at the connection between the flange 2 and the noise reduction orifice sealing surface 112 of the noise reduction orifice 11 and the blind plate sealing surface 121 of the blind plate 12. The flange 2 and the noise reduction orifice 11 are sealed by the gasket 4 to prevent leakage of the device venting pipeline.

[0032] In a possible implementation, the gasket 4 is made of a graphite wound gasket. As a sealing material under high pressure, high temperature, high corrosion and other working conditions, the graphite wound gasket can reduce leakage of the device vent pipeline and prevent energy waste and environmental pollution.

[0033] In a possible implementation, a reducing pipe 6 is also installed on the vent pipeline 8. The reducing pipe 6 is installed on the side of the vent automatic control valve 5 close to the noise reduction blind plate 1. One end of the reducing pipe 6 is connected to the vent automatic control valve 5, and the other end of the reducing pipe 6 is connected to the vent pipeline 8.

[0034] In a possible implementation, the noise reduction blind plate further includes: a connecting plate 13, one end of which is fixedly connected to the noise reduction orifice plate 11, and the other end of which is fixedly connected to the blind plate 12. Specifically, the noise reduction orifice plate 11 and the blind plate 12 can be arranged in one piece or in a separate piece according to the size of the caliber of the venting pipeline 8 and the use requirements. When the caliber of the venting pipeline is above DN200, the noise reduction orifice plate 11 and the blind plate 12 are arranged separately. When the caliber of the venting pipeline is below DN200, the noise reduction orifice plate 11 and the blind plate 12 can be arranged in one piece.

[0035] The present invention also provides a venting pipeline of a coal gasification washing tower, on which a noise reduction blind plate is arranged, the noise reduction blind plate includes a noise reduction orifice plate 11 and a blind plate 12, and the noise reduction orifice plate 11 and the blind plate 12 are installed at the same position between the venting automatic control valve 5 and the manual switch valve 7. By installing the noise reduction orifice plate 11 end and the blind plate 12 end of the noise reduction blind plate at the same position between the venting automatic control valve 5 and the manual switch valve 7, the material amount and construction amount of the venting pipeline can be reduced, the layout content on the venting pipeline can be reduced, a potential leakage point can be reduced, the layout of the venting pipeline can be more flexible, and the on-site construction and installation can be more convenient.

[0036] The present invention also provides a method for using the noise reduction blind plate. When the coal gasification scrubbing tower device is operating normally, the noise reduction orifice plate end of the noise reduction blind plate is installed on the vent pipeline 8 to reduce the noise and vibration of the device; when the device needs to be isolated, the noise reduction orifice plate end is removed, and the blind plate end of the noise reduction blind plate is installed to cut off the vent pipeline 8. When the vent pipeline diameter is above DN200, the vent pipeline diameter is large, which is inconvenient to operate during use. The noise reduction orifice plate 11 and the blind plate 12 can be separately arranged, and no connecting plate 13 is arranged between the noise reduction orifice plate 11 and the blind plate 12. When the vent pipeline diameter is below DN200, in order to prevent the noise reduction orifice plate 11 and the blind plate 12 from being lost, the noise reduction orifice plate 11 and the blind plate 12 can be arranged as one, and a connecting plate 13 is arranged between the noise reduction orifice plate 11 and the blind plate 12.

[0037] The noise reduction blind plate 1 of the present invention is constructed as a noise reduction orifice plate 11 for noise reduction and a blind plate 12 for isolation. The process venting pipeline is respectively arranged with an automatic control valve 5, a reducing pipe 6, a noise reduction blind plate 1, and a manual switch valve 7 according to the flow direction of the medium. When the device is operating normally, the noise reduction orifice plate end of the noise reduction blind plate is installed on the venting pipeline 8 to reduce the sudden change of the pressure drop in front of the plate and adjust the flow form of the process medium in the venting pipeline 8, so as to finally achieve the purpose of reducing the noise and vibration of the device; when the device needs to be isolated, such as when the equipment fails and needs to be repaired, the noise reduction orifice plate end needs to be removed and the blind plate end of the noise reduction blind plate is installed, so as to realize the truncation of the venting pipeline 8 and the sealing of the device. Compared with the traditional scheme, the synthesis gas venting pipeline is arranged in a compact gasification device, and one arrangement content is reduced on the venting pipeline of the device, and the number of pipe fittings used is reduced by 3, which reduces the material amount and construction amount of the venting pipeline, eliminates one potential leakage point, and fewer equipment also makes the venting pipeline layout more flexible and the on-site construction and installation more convenient.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A noise reduction blind plate, characterized in that: The noise reduction blind plate is installed on the synthesis gas venting pipeline (8) after the coal gasification scrubber. The venting pipeline (8) is installed with a venting automatic control valve (5) and a manual switch valve (7). The installation position of the noise reduction blind plate is located between the venting automatic control valve (5) and the manual switch valve (7). The noise reduction blind plate (1) comprises: A noise reduction orifice plate (11), the noise reduction orifice plate (11) comprising a plurality of noise reduction holes (111) opened at the center of the noise reduction orifice plate (11), the noise reduction holes (111) being used to limit the flow of a medium in a venting pipeline (8) or to reduce a sudden pressure change of the medium in the venting pipeline (8), and a noise reduction orifice plate sealing surface (112) arranged at the edge of the noise reduction orifice plate (11); A blind plate (12), the blind plate (12) comprising a blind plate sealing surface (121) arranged at an edge of the blind plate (12), the blind plate (12) being used to block the flow of a medium in the venting pipeline (8); The thickness of the blind plate sealing surface (121) is the same as the thickness of the noise reduction orifice sealing surface (112); the noise reduction orifice (11) and the blind plate (12) are installed at the same position of the venting pipeline (8).

2. The noise reduction blind plate according to claim 1, characterized in that: The noise reduction blind plate (1) further comprises a flange (2), and the noise reduction orifice plate sealing surface (112) of the noise reduction orifice plate (11) and the blind plate sealing surface (121) of the blind plate (12) are sealedly connected to the flange (2).

3. The noise reduction blind plate according to claim 2, characterized in that: The noise reduction blind plate (1) further comprises a fastener (3), wherein the fastener (3) fixes the noise reduction orifice plate (11) and the blind plate (12) on the venting pipeline (8).

4. The noise reduction blind plate according to claim 3, characterized in that: The noise reduction blind plate (1) further comprises a gasket (4), wherein the gasket (4) is arranged at the connection between the flange (2) and the noise reduction orifice plate sealing surface (112) of the noise reduction orifice plate (11) and the blind plate sealing surface (121) of the blind plate (12).

5. The noise reduction blind plate according to claim 4, characterized in that: The material of the gasket (4) is a graphite wound gasket.

6. The noise reduction blind plate according to claim 1, characterized in that: A reducing pipe (6) is also installed on the venting pipeline (8). The reducing pipe (6) is installed on a side of the venting automatic control valve (5) close to the noise reduction blind plate (1). One end of the reducing pipe (6) is connected to the venting automatic control valve (5), and the other end of the reducing pipe (6) is in communication with the venting pipeline (8).

7. The noise reduction blind plate according to claim 1, characterized in that: The noise reduction blind plate further comprises: a connecting plate (13), one end of the connecting plate (13) being fixedly connected to the noise reduction hole plate (11), and the other end of the connecting plate (13) being fixedly connected to the blind plate (12).

8. A venting pipeline for a coal gasification scrubber, characterized in that: The venting pipeline is provided with a noise reduction blind plate as described in any one of claims 1 to 7, and the noise reduction blind plate comprises a noise reduction orifice plate (11) and a blind plate (12), and the noise reduction orifice plate (11) and the blind plate (12) are installed at the same position between the venting automatic control valve (5) and the manual switch valve (7).

9. The method for using the noise reduction blind plate according to any one of claims 1 to 7, characterized in that: When the coal gasification scrubber device is operating normally, the noise reduction orifice plate end of the noise reduction blind plate is installed on the venting pipeline (8) to reduce the noise and vibration of the device; When the device needs to be isolated, the noise reduction orifice plate end is removed, the blind plate end of the noise reduction blind plate is installed, and the venting pipeline (8) is cut off.

10. The method for using the noise reduction blind plate according to claim 9, characterized in that: When the diameter of the venting pipeline (8) is greater than DN200, no connecting plate (13) is provided between the noise reduction orifice plate (11) and the blind plate (12); when the diameter of the venting pipeline (8) is less than DN200, a connecting plate (13) is provided between the noise reduction orifice plate (11) and the blind plate (12).

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