Powdery dry sludge feeding device of gasification furnace

Abstract

The utility model discloses a gasification furnace powdery dry sludge feeding device, which relates to the technical field of urban solid waste treatment, and comprises a spiral feeding device, an air closing valve, a feeding channel and a material acceleration device, the spiral feeding device is arranged above the feeding channel, and the discharging end of the spiral feeding device is communicated with one end of the feeding channel through the air closing valve; the other end of the feeding channel is connected with the feeding end of the gasification furnace; the material acceleration device is installed on the feeding channel and used for providing gas flowing towards the other end of the feeding channel into the feeding channel so as to accelerate material output in the feeding channel. Smoke in the gasification furnace can be effectively prevented from leaking outwards and escaping, and the problem that dry sludge powder is accumulated at the bottom of the feeding channel / the feeding end of the gasification furnace or is coked and blocked due to too high temperature is solved.

Description

Technical Field

[0001] The present application relates to the technical field of urban solid waste treatment, and in particular to a powdered dry sludge feeding device for a gasifier. Background Art

[0002] With the rapid development of urbanization, the treatment of urban solid waste has become an important environmental issue. All sectors of society are very concerned about the harmless treatment of urban solid waste. Among them, positive pressure circulating fluidized bed gasification furnace technology is gradually becoming practical for the treatment of the above solid waste.

[0003] The feeding device is an important device in the positive pressure circulating fluidized bed gasifier equipment. It plays the role of conveying solid waste materials into the gasifier. There are still some problems in actual use, especially for the use of powdered dry sludge feeding.

[0004] Existing feeding devices mainly include spiral feeding devices and general hydraulic feeding devices.

[0005] As for the screw feeding device, due to the fine particles, low density and light weight of the powdered dry sludge, there are still small gaps between the materials stored in the barrel or in the conveying pipe. In normal production, the internal pressure of the positive pressure circulating fluidized bed gasifier is greater than the external pressure, and the gasifier may explode in some cases, the pressure in the furnace will increase instantly, and the flue gas can easily leak out through the screw feeding device through the material gap. In addition, there is a defect that the screw feeding device is prone to high temperature coking and blockage of the material at the outlet of the furnace.

[0006] As for the general hydraulic feeding device, its vertical cross cylinder operation is complicated, and the piston pushes the material to feed intermittently, so the material entering is not uniform and continuous. The stability of the feeder directly affects the gasification efficiency of the gasifier, and the leakage of flue gas in the furnace will cause personal health damage to operators and environmental pollution.

[0007] Therefore, how to prevent the flue gas in the gasifier from escaping during feeding, ensure stable and continuous feeding, and avoid coking and blockage has become a technical problem that needs to be solved urgently. Utility Model Content

[0008] In view of this, the purpose of the present application is to provide a powdered dry sludge feeding device for a gasifier to solve the technical problems of smoke leakage, inability to feed stably and continuously, and coking and blockage during feeding of the existing feeding device.

[0009] In order to achieve the above technical purpose, the present application provides a gasifier powdered dry sludge feeding device, including a spiral feeding device, an air shut-off valve, a feeding channel and a material acceleration device;

[0010] The spiral feeding device is arranged above the feeding channel, and the discharge end is connected to one end of the feeding channel through the air shut-off valve;

[0011] The other end of the feed channel is connected to the feed end of the gasifier;

[0012] The material acceleration device is installed on the feed channel and is used to provide gas into the feed channel to flow toward the other end of the feed channel, so as to accelerate the output of the material in the feed channel.

[0013] Further, it also includes a material barrel;

[0014] The bottom of the barrel is provided with a discharge port;

[0015] The discharge port of the material barrel is connected to the feeding end of the spiral feeding device.

[0016] Furthermore, it also includes a rotary scraper and a scraper drive motor;

[0017] The rotary scraper is rotatably installed at the bottom of the barrel and is used to scrape the material in the barrel into the spiral feeding device;

[0018] The scraper driving motor is installed outside the material barrel and connected to the rotary scraper to drive the rotary scraper to rotate.

[0019] Furthermore, the screw feeding device comprises a conveying pipe, a screw feeding rod and a feeding drive motor;

[0020] The spiral feed rod is pivotally connected in the conveying pipe;

[0021] The feed drive motor is installed outside the conveying pipe and connected to the screw feed rod to drive the screw feed rod to rotate.

[0022] Further, the feed channel includes a vertical section and an inclined section;

[0023] One end of the vertical section is connected to the air shut-off valve, and the other end is connected to one end of the inclined section.

[0024] Furthermore, the width of the inclined section gradually increases from one end to the other end.

[0025] Furthermore, a fixing plate is vertically mounted on the outer wall of the feed channel;

[0026] The fixing plate is fixedly connected to the gasifier.

[0027] Further, the material acceleration device includes a first air blowing pipe;

[0028] The first blowing pipe is installed on the feeding channel near one end thereof;

[0029] One end of the first air blowing pipe is connected to the first air supply source, and the other end extends into the feed channel.

[0030] Furthermore, there are multiple first air blowing pipes, which are evenly distributed around the circumference.

[0031] Furthermore, the material acceleration device further includes a second air blowing pipe;

[0032] A communication channel is provided on the feed channel near the other end;

[0033] The gas outlet end of the communication channel is communicated with the feed channel, and a nozzle is provided on the gas outlet end of the communication channel;

[0034] One end of the second air blowing pipe is connected to the second air supply source, and the other end is connected to the air inlet end of the communication channel.

[0035] It can be seen from the above technical solutions that the powdered dry sludge feeding device for the gasifier of the present application has the following beneficial effects:

[0036] 1. Design a material acceleration device to provide the feed channel with gas flowing to the other end of the feed channel. Under the action of the flowing gas, the dry sludge powder is accelerated to output from the feed channel and presents a dispersed dust or aerosol state. This can speed up the feeding efficiency and gasification production efficiency of the dry sludge powder, and also solve the problem of dry sludge powder accumulating at the bottom of the feed channel / the feed end of the gasifier or coking and blockage caused by excessive temperature.

[0037] 2. Designed based on the spiral feeding device to ensure quantitative and sustainable output of dry sludge powder and ensure stable and continuous feeding.

[0038] 3. The air shut-off valve is set up, which can use its own rotating impeller rotor to transport the material to the feed channel. Since the impeller rotor of the air shut-off valve fits well with the valve body and has good sealing performance, it can effectively prevent the smoke in the gasifier from leaking out; moreover, the gas in the material channel can also play a certain airtight role, further improving the sealing effect.

[0039] 4. The materials used in this application are mostly standard parts and conventional profiles, and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0041] Figure 1 This is a schematic diagram of the structure of a gasifier powdered dry sludge feeding device connected to a gasifier provided in the present application;

[0042] Figure 2 A side view of a feeding channel of a powdered dry sludge feeding device for a gasifier provided in the present application;

[0043] Figure 3 for Figure 2 TT section view in;

[0044] Figure 4 for Figure 3 SS cross-sectional view in;

[0045] Figure 5 A three-dimensional diagram of a feeding channel of a powdered dry sludge feeding device for a gasifier provided in the present application;

[0046] In the figure: 100, spiral feeding device; 1, material barrel; 2, rotary scraper; 3, scraper drive motor; 4, conveying pipe; 5, spiral feeding rod; 6, feeding drive motor; 7, air shut-off valve; 8, feeding channel; 81, vertical section; 82, inclined section; 83, connecting channel; 9, gasifier; 201, fixed plate; 202, first air blowing pipe; 203, second air blowing pipe; 204, nozzle. DETAILED DESCRIPTION

[0047] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection of the embodiments of the present application.

[0048] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0050] The embodiment of the present application discloses a device for feeding powdered dry sludge into a gasifier.

[0051] See also Figure 1 An embodiment of a gasifier powdered dry sludge feeding device provided in the embodiments of the present application includes:

[0052] A spiral feeding device 100, an air shut-off valve 7, a feeding channel 8 and a material acceleration device.

[0053] The spiral feeding device 100 is arranged above the feeding channel 8, and the discharge end is connected to one end of the feeding channel 8 through the air shut-off valve 7;

[0054] The other end of the feed channel 8 is connected to the feed end of the gasifier 9;

[0055] The material acceleration device is installed on the feed channel 8 and is used to provide gas into the feed channel 8 to flow toward the other end of the feed channel 8 to accelerate the output of the material in the feed channel 8.

[0056] The powdered dry sludge feeding device for the gasifier of the present application has the following beneficial effects:

[0057] 1. A material acceleration device is designed to provide gas flowing to the other end of the feed channel 8. Under the action of the flowing gas, the dry sludge powder is accelerated to be output from the feed channel 8 and presents a dispersed dust or aerosol state. This can speed up the feeding efficiency and gasification production efficiency of the dry sludge powder, and also solve the problem of dry sludge powder accumulating at the bottom of the feed channel 8 / the feeding end of the gasifier 9 or coking and clogging caused by excessive temperature.

[0058] 2. The design is based on the spiral feeding device 100 to ensure quantitative and sustainable output of dry sludge powder and ensure stable and continuous feeding.

[0059] 3. The air shut-off valve 7 is set to use its own rotating impeller rotor to transport the material to the feed channel 8. Since the impeller rotor of the air shut-off valve 7 fits well with the valve body and has good sealing performance, it can effectively prevent the smoke in the gasification furnace 9 from leaking out; moreover, the gas in the material channel can also play a certain airtight role, further improving the sealing effect.

[0060] 4. The materials used in this application are mostly standard parts and conventional profiles, and the production cost is low.

[0061] The above is the first embodiment of a powdered dry sludge feeding device for a gasifier provided in the embodiment of the present application. The following is the second embodiment of a powdered dry sludge feeding device for a gasifier provided in the embodiment of the present application. For details, please refer to Figures 1 to 5 .

[0062] Based on the solution of the above embodiment 1:

[0063] Furthermore, if Figure 1 As shown, it also includes a barrel 1, a discharge port is provided at the bottom of the barrel 1, and the discharge port of the barrel 1 is connected to the feeding end of the spiral feeding device 100. The barrel 1 is designed as a powdered dry sludge receiving and buffering hopper.

[0064] Furthermore, if Figure 1 As shown, it also includes a rotary scraper 2 and a scraper drive motor 3.

[0065] The rotary scraper 2 is rotatably installed at the bottom of the barrel 1, and is used to scrape the material in the barrel 1 into the spiral feeding device 100; the scraper drive motor 3 is installed outside the barrel 1 and connected to the rotary scraper 2, and is used to drive the rotary scraper 2 to rotate, so as to push the material in the barrel 1 into the spiral feeding device 100.

[0066] A discharge port is provided at the right side of the bottom of the barrel 1 , and the dry sludge powder is driven by the rotary scraper 2 of the barrel 1 into the screw feeding device 100 , and then the material is continuously discharged through the screw feeding device 100 .

[0067] Furthermore, if Figure 1As shown, for the design of the screw feeding device 100, it is an existing screw conveying mechanism for powder conveying, specifically including a conveying pipe 4, a screw feeding rod 5 and a feeding drive motor 6; the screw feeding rod 5 is pivotally connected to the conveying pipe 4; the feeding drive motor 6 is installed outside the conveying pipe 4 and connected to the screw feeding rod 5, and is used to drive the screw feeding rod 5 to rotate. The screw feeding rod 5 includes a shaft and a spiral blade arranged on the shaft, a feed port is provided at the upper left part of the conveying pipe 4 to form a feed end, and a discharge port is provided at the lower right part of the conveying pipe 4 to form a discharge end, and the discharge port of the conveying pipe 4 is connected to the upper end of the air shut-off valve 7, and the lower end of the air shut-off valve 7 is connected to the upper end of the feed channel 8.

[0068] Furthermore, the feed channel 8 includes a vertical section 81 and an inclined section 82 .

[0069] One end of the vertical section 81 is connected to the air shut-off valve 7, and the other end is connected to one end of the inclined section 82. The feed channel 8 is designed in sections. The vertical section 81 is a connecting and conveying section for receiving and transferring materials, and the inclined section 82 is a main conveying section.

[0070] The width of the inclined section 82 gradually increases from one end to the other end, that is, the expansion design of the discharge port of the inclined section 82 is realized, which reduces the accumulation of materials at the discharge port of the feed channel 8 and better avoids the problem of coking and blockage.

[0071] Furthermore, a fixing plate 201 is vertically installed on the outer wall of the feed channel 8. The fixing plate 201 can be specifically designed to surround the feed channel 8. The fixing plate 201 is fixedly connected to the gasifier 9 by welding, thereby fixing the feed channel 8 on the gasifier 9.

[0072] Furthermore, if Figures 2 to 5 As shown, the material acceleration device is designed to include a first air blowing pipe 202 .

[0073] A first air blowing pipe 202 is installed on the feed channel 8 near one end thereof. Specifically, the first air blowing pipe 202 is installed at a position of the inclined section 82 close to the vertical section 81 . One end of the first air blowing pipe 202 is connected to a first air supply source (not shown in the figure), and the other end extends into the feed channel 8 .

[0074] Furthermore, the first blowing pipe 202 is preferably designed to be multiple and evenly distributed around the circumference. Figure 4 As shown, taking the cross section of the inclined section 82 of the feed channel 8 as a rectangle as an example, there are preferably four first air blowing pipes 202, which are respectively arranged at four edge positions. Each first air blowing pipe 202 is configured so that its nozzle can spray a fan-shaped airflow greater than 90°, so that the airflows sprayed simultaneously by the nozzles of the four first air blowing pipes 202 can fully cover the feed channel 8.

[0075] Furthermore, if Figure 2 as well as Figure 3 As shown, the material acceleration device further includes a second air blowing pipe 203. A connecting channel 83 is provided near the other end of the feed channel 8, the air outlet end of the connecting channel 83 is connected to the feed channel 8, and a nozzle 204 is provided on the air outlet end of the connecting channel 83; one end of the second air blowing pipe 203 is connected to a second air supply source (not shown in the figure), and the other end is connected to the air inlet end of the connecting channel 83.

[0076] Regarding the design of the connecting channel 83, it can share part of the channel wall with the feed channel 8 to reduce processing costs. At the same time, the width of the air outlet end of the connecting channel 83 is consistent with the width of the feed channel 8 and the width of the position where the air outlet end of the connecting channel 83 is connected. In this way, the output gas can better accelerate the flow of materials.

[0077] The nozzles 204 are designed to be multiple, specifically nine, for example, and are arranged in an array along the width of the connected gas outlet end.

[0078] The first gas source and the second gas source in the present application may be high-pressure blowers, without specific limitation.

[0079] The working principle of the powdered dry sludge feeding device for the gasifier designed in this application is as follows:

[0080] 1. The scraper drive motor 3 drives the rotary scraper 2 to rotate, pushing the material in the barrel 1 into the spiral feeding device 100, and the material enters the upper part of the air shut-off valve 7 through the spiral feeding device 100; because the impeller rotor of the air shut-off valve 7 is driven by the air valve motor to rotate continuously, the material rotates from the upper part to the lower part under the drive of the impeller rotor and enters the feeding channel 8. The blades in the impeller rotor rotate in close contact with the valve seat cylinder, with good sealing performance, effectively isolating the smoke of the gasification furnace 9 from leaking out through the air shut-off valve 7.

[0081] 2. Under the action of the high-pressure blower, the cold air is sprayed through the four first blowing pipes 202 to generate airflow power. Each first blowing pipe 202 can spray a fan-shaped airflow greater than 90°. When the nozzles of the four first blowing pipes 202 spray at the same time, the generated airflow can fully cover the cross-section of the inclined section 82 of the feed pipe, effectively preventing the smoke from leaking out through the inclined section 82 of the feed pipe; at the same time, the cold air enters the connecting channel 83 through the second blowing pipe 203, and then sprays out through the nozzle 204; During this period, the dry sludge powder passes through the air-closing valve 7 and falls under the action of gravity, and then mixes with the airflow sprayed from the first blowing pipe 202. Under the action of the airflow, the material is accelerated to enter the bottom of the feed channel 8, and meets the airflow sprayed from the nozzle 204 at the bottom. The dry sludge powder is further accelerated to fluidize. At this time, the material presents a dispersed dust or aerosol state; the feeding efficiency and gasification production efficiency of the dry sludge powder are accelerated, and the problem of dry sludge powder accumulating at the bottom / discharge end of the feed channel 8 or coking and clogging caused by excessive temperature is also solved.

[0082] The above is a detailed introduction to a powdered dry sludge feeding device for a gasifier provided in the present application. For a person skilled in the art, according to the idea of ​​the embodiments of the present application, there may be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A powdered dry sludge feeding device for a gasifier, characterized in that: It comprises a spiral feeding device (100), an air shut-off valve (7), a feeding channel (8) and a material acceleration device; The spiral feeding device (100) is arranged above the feeding channel (8), and the discharge end is connected to one end of the feeding channel (8) via the air shut-off valve (7); The other end of the feed channel (8) is connected to the feed end of the gasifier (9); The material acceleration device is installed on the feed channel (8) and is used to provide gas into the feed channel (8) to flow toward the other end of the feed channel (8) so as to accelerate the output of the material in the feed channel (8).

2. The powdered dry sludge feeding device for a gasifier according to claim 1, characterized in that: Also includes a material barrel (1); The bottom of the barrel (1) is provided with a discharge port; The discharge port of the material barrel (1) is connected to the feeding end of the spiral feeding device (100).

3. The powdered dry sludge feeding device for a gasifier according to claim 2, characterized in that: It also includes a rotary scraper (2) and a scraper drive motor (3); The rotary scraper (2) is rotatably mounted at the bottom of the barrel (1) and is used to scrape the material in the barrel (1) into the spiral feeding device (100); The scraper drive motor (3) is installed outside the material barrel (1) and is connected to the rotary scraper (2) to drive the rotary scraper (2) to rotate.

4. The powdered dry sludge feeding device for a gasifier according to claim 1, characterized in that: The screw feeding device (100) comprises a conveying pipe (4), a screw feeding rod (5) and a feeding drive motor (6); The spiral feeding rod (5) is pivotally connected to the conveying pipe (4); The feed drive motor (6) is installed outside the conveying pipe (4) and is connected to the screw feed rod (5) to drive the screw feed rod (5) to rotate.

5. The powdered dry sludge feeding device for a gasifier according to claim 1, characterized in that: The feed channel (8) comprises a vertical section (81) and an inclined section (82); One end of the vertical section (81) is connected to the air shut-off valve (7), and the other end is connected to one end of the inclined section (82).

6. The powdered dry sludge feeding device for a gasifier according to claim 5, characterized in that: The width of the inclined section (82) gradually increases from one end to the other end.

7. The powdered dry sludge feeding device for a gasifier according to claim 1, characterized in that: A fixing plate (201) is vertically mounted on the outer wall of the feed channel (8); The fixing plate (201) is fixedly connected to the gasification furnace (9).

8. The powdered dry sludge feeding device for a gasifier according to claim 1, characterized in that: The material acceleration device comprises a first air blowing pipe (202); The first blowing pipe (202) is installed on the feeding channel (8) at a position close to one end thereof; One end of the first air blowing pipe (202) is connected to a first air supply source, and the other end extends into the feed channel (8).

9. The powdered dry sludge feeding device for a gasifier according to claim 8, characterized in that: There are multiple first air blowing pipes (202) which are evenly distributed around the circumference.

10. The device for feeding powdered dry sludge into a gasifier according to claim 1, characterized in that: The material acceleration device further comprises a second air blowing pipe (203); A communication channel (83) is provided on the feed channel (8) near the other end; The gas outlet end of the communication channel (83) is in communication with the feed channel (8), and a nozzle (204) is provided on the gas outlet end of the communication channel (83); One end of the second air blowing pipe (203) is connected to a second air supply source, and the other end is connected to the air inlet end of the communication channel (83).

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