Pulverized coal conveying pipeline system

Abstract

The utility model discloses a pulverized coal conveying pipeline system which comprises a feeding tank, a coal discharging pipeline is connected to the feeding tank, a first air conveying pipe is connected to the feeding tank, a plurality of pulverized coal conveying pipes are communicated to the feeding tank, one end of each pulverized coal conveying pipe is connected with the feeding tank through an inflation cone, and a valve set is installed on each pulverized coal conveying pipe. A control valve is installed on the pulverized coal conveying pipe, a circulation cavity and a movable cavity are formed in the valve body, a piston is arranged in the movable cavity, one end face of the piston is connected with the telescopic end of a movable rod, a flow meter is further installed on the pulverized coal conveying pipe, and the other end of the pulverized coal conveying pipe is communicated with the gasification furnace. The flow of pulverized coal in the pulverized coal conveying pipes is detected through the flow meter, the movable rod is controlled to drive the piston to move in the circulation cavity of the valve body, the size of the flowing section of the circulation cavity is changed so as to adjust the conveying flow of the pulverized coal in the pulverized coal conveying pipes, and the flow of the pulverized coal in the multiple pulverized coal conveying pipes is average; and the overall gasification efficiency of the pulverized coal in the gasification furnace can be improved.

Description

Technical Field

[0001] This application belongs to the technical field of coal gasification processing equipment, specifically relating to a pulverized coal conveying pipeline system. Background Technology

[0002] Gasifiers are the core equipment for coal gasification. With increasing emphasis on environmental protection, more and more companies are investing in the research of energy-saving and environmental protection equipment. Dry coal powder gasification technology has become a globally recognized technology for the efficient and clean utilization of coal due to its unique clean and efficient characteristics.

[0003] The working principle of a pulverized coal gasifier is that pulverized coal reacts with oxygen (or air) and water vapor under high temperature and high pressure conditions inside the gasifier, causing the dry distillate to decompose and gasify rapidly, generating syngas mainly composed of CO and H2.

[0004] In existing technologies, in order to increase the amount of pulverized coal conveyed and meet the operational requirements of the gasifier, pulverized coal needs to be transported to the gasifier through multiple coal conveying pipelines for gasification. The problem is that due to the differences in the length and location of the multiple pulverized coal conveying pipelines, the resistance to the flow of pulverized coal in the pipelines varies, resulting in differences in the flow rate of pulverized coal conveyed by different pipelines. Uneven flow rates of pulverized coal into different pipelines lead to inconsistent reaction conditions in different areas of the gasifier. That is, some areas may not react completely due to excessive pulverized coal, while other areas may not react sufficiently due to insufficient pulverized coal, thereby reducing the overall gasification efficiency of pulverized coal in the gasifier. Utility Model Content

[0005] To address the problems encountered in the background art, this application proposes a pulverized coal conveying pipeline system to improve the stability of the pulverized coal conveying volume into the gasifier and reduce the difference in pulverized coal flow rate into the gasifier through the pipeline, thereby improving the gasification efficiency of pulverized coal.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A pulverized coal conveying pipeline system includes a feeding tank connected to a coal discharge pipeline for adding pulverized coal to the feeding tank. A first air supply pipe is connected to the feeding tank. Multiple pulverized coal conveying pipes are connected to the feeding tank. One end of each pulverized coal conveying pipe is connected to the feeding tank via an air-filling cone. A valve assembly is installed on each pulverized coal conveying pipe, including a control valve. The control valve includes a valve body with a flow chamber and a movable chamber inside. A piston is located in the movable chamber, and one end of the piston is connected to the extension end of a movable rod. A flow meter is also installed on each pulverized coal conveying pipe, connected to the pulverized coal conveying pipe via a connector. The other end of the pulverized coal conveying pipe is connected to a gasifier.

[0008] In one embodiment of this application, the end face of the piston within the flow cavity is a smooth arc surface.

[0009] In one embodiment of this application, the outer wall of the valve body is connected to a sleeve, and the shaft of a movable rod is inserted into the insertion hole of the sleeve.

[0010] In one embodiment of this application, the inflatable cone is provided with a material passage chamber, the upper end of the material passage chamber is provided with a flange, and the side of the inflatable cone is connected to the second air supply pipe.

[0011] In one embodiment of this application, the inflatable cone is provided with an air inlet chamber, which is connected to a second air supply pipe, and the second air supply pipe is connected to the material passage chamber through the air outlet of the air inlet chamber.

[0012] In one embodiment of this application, a connecting clamp is provided on the outside of the pulverized coal conveying pipe.

[0013] In one embodiment of this application, the flow meter is detachably connected to the pulverized coal conveying pipe.

[0014] In one embodiment of this application, the inner wall of the pulverized coal conveying pipe is provided with an inner lining layer.

[0015] In one embodiment of this application, the dispensing tank is equipped with a safety valve.

[0016] In one embodiment of this application, the movable rod of the valve body is an electric push rod, which is electrically connected to the controller, and the flow meter is electrically connected to the controller.

[0017] In summary, the technical solution proposed in this application includes the following beneficial technical effects: This application uses a flow meter to detect the coal powder flow rate in the coal powder conveying pipe. When the flow rate deviates from the set value, the control rod drives the piston to move in the flow chamber of the valve body, changing the flow cross-section size of the flow chamber to adjust the coal powder conveying flow rate in the coal powder conveying pipe. This makes the coal powder flow rate in multiple coal powder conveying pipes average, and the coal powder flow rate introduced into different pipelines uniform. This makes the reaction conditions in different areas of the gasifier consistent, and the coal powder reacts uniformly and fully in the gasifier, thereby improving the overall gasification efficiency of the coal powder in the gasifier. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structural connection of pipeline components in a pulverized coal conveying pipeline according to an embodiment of this application;

[0020] Figure 2 A schematic diagram of the air-filled cone cross-sectional structure of a pulverized coal conveying pipeline system provided in an embodiment of this application;

[0021] Figure 3 A schematic diagram of the cross-sectional structure of a control valve in a pulverized coal conveying pipeline system provided in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the coal powder conveying pipe structure of a coal powder conveying pipeline system provided in an embodiment of this application;

[0023] Figure 5 A schematic diagram of the controller circuit connection of a pulverized coal conveying pipeline system provided in an embodiment of this application;

[0024] In the picture: Feeding tank 1;

[0025] Safety valve 11;

[0026] Coal supply pipeline 2;

[0027] First air supply pipe 3;

[0028] 4. Pulverized coal conveying pipe;

[0029] Valve assembly 41;

[0030] Connecting hoop 42;

[0031] Inner lining layer 43;

[0032] Control valve 5;

[0033] Valve body 51;

[0034] Flow chamber 52;

[0035] Movable cavity 53;

[0036] Sleeve 54;

[0037] Piston 531;

[0038] Movable lever 532;

[0039] Flow meter 6;

[0040] Gasifier 7;

[0041] 8-inch inflatable cone;

[0042] Feeding chamber 81;

[0043] Flange 82;

[0044] Second air supply pipe 83;

[0045] Air intake chamber 84. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0047] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] In this application, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0049] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0050] This embodiment provides a pulverized coal conveying pipeline system, see reference. Figures 1-5As shown, the system includes a feeding tank 1, a coal feeding pipeline 2 connected to the feeding tank 1 for adding pulverized coal to the feeding tank 1, a first air supply pipe 3 connected to the feeding tank 1, and multiple pulverized coal conveying pipes 4 connected to the feeding tank 1. One end of each pulverized coal conveying pipe 4 is connected to the feeding tank 1 via an air-filling cone 8. A valve assembly 41 is installed on each pulverized coal conveying pipe 4, and a control valve 5 is installed on each pulverized coal conveying pipe 4. The control valve 5 includes a valve body 51, a flow chamber 52 and a movable chamber 53 are provided inside the valve body 51, and a piston 531 is provided inside the movable chamber 53. One end face of the piston 531 is connected to the telescopic end of the movable rod 532. A flow meter 6 is also installed on each pulverized coal conveying pipe 4, and the flow meter 6 is connected to the pulverized coal conveying pipe 4 via a connector. The other end of the pulverized coal conveying pipe 4 is connected to a gasifier 7.

[0051] In the above embodiment, the feeding tank 1 is used to inject pulverized coal into the pulverized coal conveying pipe 4. The feeding tank 1 is connected to a coal discharge pipe 2, which is used to add pulverized coal into the feeding tank 1. The coal discharge pipe 2 is in the open state when adding pulverized coal and in the closed state after adding is completed to ensure the airtightness of the feeding tank 1 and prevent the pulverized coal added into the feeding tank 1 from leaking out of the feeding tank 1 through the coal discharge pipe 2. The feeding tank 1 is connected to a first air supply pipe 3, which is used to introduce pressurized gas into the feeding tank 1, so that the internal pressure of the feeding tank 1 is greater than the external pressure of the feeding tank 1. The feeding tank 1 is connected to multiple pulverized coal conveying pipes 4, that is, the pulverized coal is injected into the pulverized coal conveying pipes 4 for conveying through the internal and external pressure difference. One end of the pulverized coal conveying pipe 4 is connected to the feeding tank 1 via an air-filling cone 8. The valve assembly 41 consists of two independent valves 41 installed on the same pulverized coal conveying pipe 4. This assembly ensures that if one valve fails for any reason, the other valve can still function, guaranteeing safe shut-off of the pipeline and improving the safety of the conveying line. Furthermore, a control valve 5 is installed on the pulverized coal conveying pipe 4. The valve body 51 of the control valve 5 contains a flow chamber 52 and a movable chamber 53. A piston 531 is installed in the movable chamber 53. Figure 3As shown in the example, in the initial state of the control valve 5, the piston 531 is located in the middle of the flow chamber 52, and one end face of the piston 531 is connected to the telescopic end of the movable rod 532. The movable rod 532 can be a hydraulic telescopic rod. When the movable rod 532 pushes the piston 531 upward in the flow chamber 52, the flow cross section of the flow chamber 52 decreases, which reduces the flow rate of pulverized coal through the valve body 51. Similarly, the movable rod 532 pulls the piston 531 downward, which increases the flow cross section of the flow chamber 52, which increases the flow rate of pulverized coal through the valve body 51. A flow meter 6 is also installed on the pulverized coal conveying pipe 4. The flow meter 6 is used to measure the flow rate of pulverized coal in the pulverized coal conveying pipe 4. That is, the flow meter 6 detects the flow rate of pulverized coal in the pulverized coal conveying pipe 4. When the flow rate deviates from the set value, the control rod 532 drives the piston 531 to move in the flow chamber 52 of the valve body 51, changing the flow cross-section of the flow chamber 52 to adjust the flow rate of pulverized coal in the pulverized coal conveying pipe 4. This makes the flow rate of pulverized coal in multiple pulverized coal conveying pipes 4 average, and the flow rate of pulverized coal introduced into different pipelines uniform. Multiple pulverized coal conveying pipes 4 are connected to different areas of the gasifier 7, so that the amount of pulverized coal introduced into different areas of the gasifier 7 is consistent, and the pulverized coal reacts uniformly and fully in the gasifier 7, which is beneficial to improving the overall gasification efficiency of pulverized coal in the gasifier 7.

[0052] On the other hand, the actual coal powder flow rate may deviate from the initial theoretical setting value due to changes in the amount of coal powder inside the feeding tank 1 or changes in the external environment such as temperature. In order to ensure uniform feeding in the pipeline, the measured values ​​of multiple pipelines at a certain moment can be selected and averaged. The control valve 5 is adjusted according to the calculated average value to change the coal powder flow rate in the coal powder conveying pipe 4, so that the flow rate in multiple coal powder conveying pipes 4 is uniform.

[0053] In one embodiment of this application, see reference Figure 3 As shown, the end face of the piston 531 within the flow chamber 52 is a smooth arc surface.

[0054] In the above embodiment, when the pulverized coal flows in the flow cavity 52, it will come into contact with the end face of the piston 531. The smooth arc surface can reduce the accumulation of pulverized coal on the end face of the piston 531 and prevent the pulverized coal from forming a blockage in the flow cavity 52. ​​In addition, the smooth arc surface can guide the flowing pulverized coal, so that the pulverized coal can flow more smoothly in the flow cavity 52, which is beneficial to improving the uniformity and stability of the flow of pulverized coal in the flow cavity 52.

[0055] In one embodiment of this application, see [reference] Figure 3 As shown, the outer wall of the valve body 51 is connected to a sleeve 54, and the rod body of the movable rod 532 is inserted into the insertion hole of the sleeve 54.

[0056] In the above embodiment, a sleeve 54 is connected to the outer wall of the valve body 51, and the sleeve 54 is fitted onto the outer wall of the movable rod 532, that is, the rod body of the movable rod 532 is inserted into the sleeve 54, such as... Figure 3 For example, the sleeve 54 is used to limit the movement of the movable rod 532, so that the movement of the movable rod 532 in the movable cavity 53 remains vertical. This helps to improve the stability of the operation of the control valve 5 and prevents the piston 531 from being impacted by pulverized coal, which would cause the movable rod 532 to deviate in the movable cavity 53, preventing the movable rod 532 from extending and retracting normally in the movable cavity 53. This would prevent the piston 531 from moving normally in the flow cavity 52, thereby affecting the control of the pulverized coal flow rate.

[0057] In one embodiment of this application, see reference Figure 2 As shown, the air-filled cone 8 is provided with a material passage chamber 81, and a flange 82 is provided at the upper end of the material inlet of the material passage chamber 81. The side of the air-filled cone 8 is connected to the second air supply pipe 83.

[0058] In the above embodiment, the inflation cone 8 is provided with a material passage chamber 81, and a flange 82 is provided at the upper end of the material inlet of the material passage chamber 81. The flange 82 is provided with multiple connection ports to facilitate the docking and installation of the inflation cone 8 with the discharge port of the feeding tank 1. The side of the inflation cone 8 is connected to the second air supply pipe 83, which is used to introduce gas into the material passage chamber 81 of the inflation cone 8. For example, carbon dioxide gas or water vapor can be introduced to mix the carbon dioxide gas or water vapor with the pulverized coal. Since pulverized coal is flammable, the carbon dioxide gas or water vapor can act as a flame-retardant protective gas to improve the safety of pulverized coal during transportation.

[0059] In one embodiment of this application, see reference Figure 2 As shown, the air inlet cone 8 is provided with an air inlet chamber 84, which is connected to the second air supply pipe 83. The second air supply pipe 83 is connected to the material passage chamber 81 through the air outlet of the air inlet chamber 84.

[0060] In the above embodiments, such as Figure 2 For example, pulverized coal enters from the feed inlet at the top of the air-filling cone 8 and exits from the discharge outlet at the bottom of the air-filling cone 8. The air outlet of the air-filling chamber 84 is located at the bottom of the air-filling chamber 84, and the direction of the air outlet is the same as the flow direction of the pulverized coal in the feed chamber 81. The side wall of the air-filling chamber 84 is used to prevent the flowing pulverized coal from directly rushing into the second air conveying pipe 83, which would cause the pulverized coal to block the second air conveying pipe 83. The direction of the air outlet is the same as the flow direction of the pulverized coal in the feed chamber 81, which can prevent the flowing pulverized coal from directly rushing into the second air conveying pipe 83 and causing blockage of the air conveying pipe. This is beneficial to improving the smoothness of the gas entering the air-filling cone 8 from the second air conveying pipe 83.

[0061] In one embodiment of this application, see reference Figure 4As shown, a connecting clamp 42 is provided on the outside of the pulverized coal conveying pipe 4.

[0062] In the above embodiment, the connecting clamp 42 is fitted onto the outer ring of the pulverized coal conveying pipe 4. The outer ring of the connecting clamp 42 can be connected to the support rod by welding. The support rod is supported on the ground to support the pulverized coal conveying pipe 4, which helps to improve the stability of the pulverized coal conveying pipe 4. In addition, if it is necessary to change the support point of the pulverized coal conveying pipe 4, the connecting clamp 42 can be directly removed from the conveying pipe. Compared with directly connecting the support component to the outer wall of the conveying pipe, this avoids damage to the outer wall of the conveying pipe and prevents the conveying pipe from breaking when the support component is disassembled, which helps to improve the safety of disassembly and assembly of the conveying pipe.

[0063] In one embodiment of this application, the flow meter 6 is detachably connected to the pulverized coal conveying pipe 4.

[0064] In the above embodiments, the flow meter 6 can be detachably connected to the pulverized coal conveying pipe 4 through a threaded hole connector, which facilitates the disassembly of the flow meter 6 during maintenance and repair of the conveying pipeline and its delivery to a testing institution for adjustment and calibration, thereby improving the accuracy of the flow meter 6 during testing and use.

[0065] In one embodiment of this application, see reference Figure 4 As shown, the inner wall of the pulverized coal conveying pipe 4 is provided with an inner lining layer 43.

[0066] In the above embodiments, during the flow of pulverized coal in the pulverized coal conveying pipe 4, the pulverized coal will rub and collide with the inner wall of the pulverized coal conveying pipe 4, which can easily lead to wear on the inner wall surface of the pulverized coal conveying pipe 4, thereby shortening the service life of the pulverized coal conveying pipe 4. Providing an inner lining layer 43 on the inner wall of the pulverized coal conveying pipe 4 can improve the wear resistance of the inner wall of the pulverized coal conveying pipe 4, extend the service life of the pulverized coal conveying pipe 4, and reduce maintenance costs caused by wear. Optionally, the material of the inner lining layer 43 can be alumina.

[0067] In one embodiment of this application, see reference Figure 1 As shown, the feeding tank 1 is equipped with a safety valve.

[0068] In the above embodiment, when the internal pressure of the dispensing tank 1 exceeds the preset pressure value, the safety valve will open to release the pressure, so as to ensure the safety of the internal pressure of the dispensing tank 1.

[0069] In one embodiment of this application, see reference Figure 5 As shown, the movable rod 532 of the valve body 51 is an electric push rod, which is electrically connected to the controller, and the flow meter 6 is electrically connected to the controller.

[0070] In the above embodiment, multiple flow meters 6 transmit the flow data of each pulverized coal conveying pipe 4 to the controller via electrical signals. The controller can be an MCU or a PLC. The controller collects, records, and processes multiple flow information at a certain moment, calculates and records the average value, and compares the average flow value with the flow data of each individual pulverized coal conveying pipe 4. When the flow data is greater than the average value, the controller controls the electric push rod to push the piston 531 upward to reduce the flow of pulverized coal in the flow chamber 52, so that the flow rate of the adjusted pulverized coal flow meter 6 is equal to the previously calculated average value. Similarly, when the flow data is less than the average value, the controller controls the electric push rod to drive the piston 531 downward to increase the flow of pulverized coal in the flow chamber 52, so that the flow rate of the adjusted pulverized coal flow meter 6 is equal to the previously calculated average value, thereby realizing the average adjustment of the pulverized coal flow in multiple pulverized coal conveying pipes 4.

[0071] In actual use, the feeding tank 1 is connected to a coal feeding pipeline 2 for adding pulverized coal. The coal feeding pipeline 2 is open when adding pulverized coal and closed after addition to ensure the sealing of the feeding tank 1 and prevent the pulverized coal added to the feeding tank 1 from leaking out through the coal feeding pipeline 2. The feeding tank 1 is also connected to a first air supply pipe 3, which introduces pressurized gas into the feeding tank 1, making the internal pressure of the feeding tank 1 greater than the external pressure. Multiple pulverized coal conveying pipes 4 are connected to the feeding tank 1, meaning that the pulverized coal is injected into the pulverized coal input pipes for conveying through the internal and external pressure difference. The feeding tank 1 is equipped with a safety valve. When the internal pressure of the feeding tank 1 exceeds a preset pressure value, the safety valve will open to release pressure, ensuring the pressure safety inside the feeding tank 1. The inner wall of the conveying pipe 4 is provided with an inner lining layer 43, which can improve the wear resistance of the inner wall of the pulverized coal conveying pipe 4, extend the service life of the pulverized coal conveying pipe 4, and reduce maintenance costs caused by wear. One end of the pulverized coal conveying pipe 4 is connected to an air-filling cone 8, and a material passage chamber 81 is provided inside the air-filling cone 8. A flange 82 is provided at the upper end of the inlet of the material passage chamber 81. The side of the air-filling cone 8 is connected to the second air-filling pipe 83. The second air-filling pipe 83 can also introduce different gases into the pulverized coal in the material passage chamber 81 according to process requirements to regulate the composition of the product. It is connected to the feeding tank 1. The valve group 41 consists of two independent valves 41, which are installed on the same pulverized coal conveying pipe 4. Its function is that when one valve fails for some reason, the other valve can still function, ensuring the safe disconnection of the pipeline and improving the safety of the conveying pipeline. Furthermore, a control valve 5 is installed on the pulverized coal conveying pipe 4, and the valve body 51 of the control valve 5 is respectively provided with a flow chamber 52 and a movable chamber 53. A piston 531 is provided in the movable chamber 53. The end face of the piston 531 in the flow chamber 52 is a smooth arc surface. The smooth arc surface can reduce the accumulation of pulverized coal on the end face of the piston 531 and prevent pulverized coal from forming a blockage in the flow chamber 52. Figure 3 As illustrated, in the initial state of control valve 5, piston 531 is located in the middle of flow chamber 52, and one end face of piston 531 is connected to the telescopic end of movable rod 532. Movable rod 532 can be a hydraulic telescopic rod. When movable rod 532 pushes piston 531 upward within flow chamber 52, the flow cross-section of flow chamber 52 decreases, thus reducing the flow rate of pulverized coal through valve body 51. Similarly, movable rod 532 pulls piston 531 downward, increasing the flow cross-section of flow chamber 52, thus increasing the flow rate of pulverized coal through valve body 51. A sleeve 54 is connected to the outer wall of valve body 51, and the shaft of movable rod 532 is inserted into the insertion hole of sleeve 54. Figure 3 For example, sleeve 54 is used to limit the movement of movable rod 532, ensuring that the movement of movable rod 532 within movable cavity 53 remains vertical, which helps improve the stability of control valve 5 operation. A flow meter 6 is also installed on the pulverized coal conveying pipe 4. The flow meter 6 measures the pulverized coal flow rate within the pulverized coal conveying pipe 4. When the flow rate deviates from the set value, the movable rod 532 drives piston 531 to move within the flow cavity 52 of valve body 51, changing the flow cross-section of the flow cavity 52 to adjust the pulverized coal conveying flow rate within the pulverized coal conveying pipe 4. This ensures that the pulverized coal flow rate in multiple pulverized coal conveying pipes 4 is averaged, and the pulverized coal flow rate from different pipelines is uniform. This ensures consistent reaction conditions in different areas of gasifier 7, allowing the pulverized coal to react uniformly and fully within gasifier 7, thereby improving the overall gasification efficiency of pulverized coal within gasifier 7.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pulverized coal transfer line system, characterized by, The application relates to a coal powder feeding device, which comprises a feeding tank (1), a lower coal pipeline (2) connected to the feeding tank (1) and used for adding coal powder into the feeding tank (1), a first air conveying pipe (3) connected to the feeding tank (1), a plurality of coal powder conveying pipes (4) in communication with the feeding tank (1), a valve group (41) installed on the coal powder conveying pipe (4), a control valve (5) installed on the coal powder conveying pipe (4), a flowmeter (6) installed on the coal powder conveying pipe (4) and connected to the coal powder conveying pipe (4) through a connecting piece, and a gasification furnace (7) connected to the other end of the coal powder conveying pipe (4).

2. The pulverized coal delivery line system of claim 1, wherein, The end face of the piston (531) in the flow passage (52) is a smooth arc face.

3. The pulverized coal delivery line system of claim 2, wherein, The outer wall of the valve body (51) is connected with a sleeve (54), and the sleeve (54) is inserted with the rod body of the movable rod (532).

4. The pulverized coal delivery line system of claim 1, wherein, The air inflating cone (8) is provided with a material passing cavity (81), the flange (82) is arranged on the inlet end of the material passing cavity (81), and the side of the air inflating cone (8) is in communication with the second air conveying pipe (83).

5. The pulverized coal delivery line system of claim 4, wherein, The air inflating cone (8) is provided with an air inlet cavity (84), the air inlet cavity (84) is in communication with the second air conveying pipe (83), and the second air conveying pipe (83) is in communication with the material passing cavity (81) through the air outlet of the air inlet cavity (84).

6. The pulverized coal delivery line system of claim 1, wherein, The coal powder conveying pipe (4) is externally provided with a connecting hoop (42).

7. The pulverized coal delivery line system of claim 1, wherein, The flowmeter (6) is detachably connected with the coal powder conveying pipe (4).

8. The pulverized coal delivery line system of claim 1, wherein, The inner wall of the coal powder conveying pipe (4) is provided with an inner lining layer (43).

9. The pulverized coal delivery line system of claim 1, wherein, The tank body of the feeding tank (1) is provided with a safety valve (11).

10. The pulverized coal delivery line system of claim 1, wherein, The movable rod (532) of the valve body is an electric push rod, the electric push rod is electrically connected with a controller, and the flowmeter (6) is electrically connected with the controller.

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