A waste incineration power generation tail gas denitration heat supply device

Abstract

The utility model belongs to tail gas denitration heat supply device technical field, concretely is a kind of garbage incineration power generation tail gas denitration heat supply device, including denitration tower, the top of denitration tower is provided with the exhaust pipe for carrying out exhaust, the side of denitration tower is sequentially provided with ammonia supply pipeline and air inlet pipe from top to bottom, the outside of ammonia supply pipeline is wound with the heat supply pipeline connected with air inlet pipe, to utilize waste heat for ammonia supply pipeline heat tracing.The utility model is installed detachable filter screen in air inlet pipe, and filter screen is set to funnel structure, for intercepting large particle in flue gas, to reduce the attrition of catalyst;Simultaneously, centrifugal force is generated by impeller driving filter screen rotation, and large particle moves to filter screen edge, to prevent filter screen from being blocked;And dynamic rotation makes flue gas contact surface constantly update, improves particle interception efficiency, avoids uneven airflow distribution caused by local blockage.

Description

Technical Field

[0001] This utility model belongs to the technical field of exhaust gas denitrification and heating devices, specifically a waste incineration power generation exhaust gas denitrification and heating device. Background Technology

[0002] The waste-to-energy incineration flue gas denitrification and heating system is a specialized flue gas treatment system for waste-to-energy incineration plants. Its core function is to remove nitrogen oxides (NOx) from the flue gas through denitrification technology. X At the same time, it combines heating mechanisms to recover heat energy or maintain pipeline temperature in order to reduce environmental pollution and improve energy efficiency.

[0003] In actual use, the denitrification tower is connected to the output end of the incinerator. The high-temperature flue gas discharged from the incinerator first passes through the waste heat boiler, and then is sent to the heating pipeline through the connecting pipe so that the heating pipeline can use the waste heat to heat the ammonia supply pipeline, maintain the optimal temperature of the ammonia supply pipeline, and prevent ammonia crystallization blockage. Then the flue gas is introduced into the denitrification tower for denitrification treatment. However, the flue gas contains a large amount of particulate matter, which will aggravate the wear of the catalyst. Summary of the Invention

[0004] The purpose of this utility model is to provide a waste incineration power generation flue gas denitrification and heating device to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste incineration power generation flue gas denitrification and heating device, including a denitrification tower, an exhaust pipe for exhausting gas is provided at the top of the denitrification tower, an ammonia supply pipe and an air inlet pipe are arranged sequentially from top to bottom on one side of the denitrification tower, and a heating pipe connected to the air inlet pipe is wound around the outside of the ammonia supply pipe so as to use waste heat to heat the ammonia supply pipe; A sealing cap is threaded onto the side of the air inlet pipe away from the denitrification tower. A retainer is provided on the inner side of the sealing cap. A limit ring is slidably connected inside the air inlet pipe. A filter screen for filtration is engaged on the inner side of the limit ring. A mounting bracket is provided inside the air inlet pipe on the side near the denitrification tower. An impeller is rotatably connected to the side of the mounting bracket away from the denitrification tower to drive the filter screen to rotate. A docking plate is fixedly connected to the side of the impeller away from the mounting bracket. A docking groove is provided on the side of the filter screen near the impeller to form a locking structure with the docking plate.

[0006] Preferably, the abutment includes an annular limiting plate and a limiting rod fixed at an equal angle between the annular limiting plate and the sealing cover. A ball bearing is rolled inside one side of the abutment, and the ball bearing is used to make the filter screen rotate smoothly.

[0007] Preferably, the outer surface of the limiting ring is symmetrically provided with annular plates, and the inside of the air intake pipe is provided with annular grooves that form a sliding structure with the annular plates. The annular plates and annular grooves cooperate to support and limit the limiting ring.

[0008] Preferably, the filter screen is configured as a funnel-shaped structure, and the filter screen is a PTFE-coated metal filter screen with a stainless steel mesh as the base material and a polytetrafluoroethylene microporous membrane on the surface. An annular baffle is provided on the side of the filter screen near the support frame. Pull rings are symmetrically arranged on the side of the filter screen near the support frame.

[0009] Preferably, the inner side of the limiting ring is provided with a slot at an equal angle, and a locking strip connected to the filter screen is engaged inside the slot, and the locking strip and the slot cooperate to make the limiting ring and the filter screen move synchronously.

[0010] Preferably, the impeller is made of 316L stainless steel to avoid jamming or damage caused by acidic components in the flue gas; both the docking plate and the docking groove are polygonal, and the docking plate and the docking groove cooperate to make the filter screen move synchronously with the impeller.

[0011] Preferably, a connecting pipe is provided on one side of the heating pipeline, one end of which is connected to the waste heat boiler, and the waste heat boiler is connected to the output end of the incinerator.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention features a removable filter screen installed inside the intake pipe. The filter screen is designed with a funnel shape to intercept large particles in the flue gas, thereby reducing wear on the catalyst. At the same time, the impeller drives the filter screen to rotate, generating centrifugal force that moves large particles towards the edge of the filter screen, preventing clogging. Furthermore, the dynamic rotation continuously refreshes the flue gas contact surface, improving particle interception efficiency and avoiding uneven airflow distribution caused by localized blockages. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the air intake pipe of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A; Figure 4 This is an exploded perspective view of the filter screen and the limiting ring of this utility model; Figure 5 This is an exploded perspective view of the filter screen and connecting plate of this utility model; Figure 6 This is a three-dimensional structural diagram of the support frame of this utility model.

[0014] In the diagram: 1. Denitrification tower; 2. Inlet pipe; 201. Sealing cover; 3. Ammonia supply pipe; 4. Heating pipe; 5. Exhaust pipe; 6. Mounting bracket; 601. Impeller; 7. Filter screen; 701. Clip; 702. Slot; 8. Limiting ring; 801. Annular plate; 802. Annular groove; 9. Support frame; 901. Ball bearing; 10. Connecting plate; 11. Connecting groove. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a waste incineration power generation tail gas denitrification and heating device, including a denitrification tower 1, an exhaust pipe 5 is provided at the top of the denitrification tower 1 for exhausting gas, an ammonia supply pipe 3 and an air inlet pipe 2 are arranged sequentially from top to bottom on one side of the denitrification tower 1, the ammonia supply pipe 3 is used to transport ammonia gas to the ammonia injection grid, a heating pipe 4 connected to the air inlet pipe 2 is wound around the outside of the ammonia supply pipe 3, the heating pipe 4 is used to heat the ammonia supply pipe 3 using waste heat, a connecting pipe is provided on one side of the heating pipe 4, one end of the connecting pipe is connected to the waste heat boiler, and the waste heat boiler is connected to the output end of the incinerator; Specifically, the ammonia supply pipeline 3 is directly connected to the ammonia injection grid inside the denitrification tower, and is responsible for transporting ammonia gas to the ammonia injection grid so that it can be evenly injected into the flue gas through the ammonia injection grid for denitrification reaction; The flue gas is sent to the heating pipe 4 through the connecting pipe. The heating pipe 4 is wrapped around the ammonia supply pipe 3 so that the heating pipe 4 can use the waste heat to heat the ammonia supply pipe 3, thereby maintaining the optimal temperature of the ammonia supply pipe 3 and preventing ammonia crystallization and blockage. Then the flue gas is introduced into the denitrification tower 1 through the air inlet pipe 2 for denitrification treatment.

[0017] exist Figures 1-3 and Figure 6 In the middle section: A sealing cap 201 is threadedly connected to the side of the air inlet pipe 2 away from the denitrification tower 1. The sealing cap 201 is used to seal the port of the air inlet pipe 2. A retainer 9 is provided on the inner side of the sealing cap 201. The retainer 9 is used to limit the filter screen 7. The retainer 9 includes an annular limiting plate and a limiting rod fixed at an equal angle between the annular limiting plate and the sealing cap 201. A ball bearing 901 is rolled inside one side of the retainer 9, which allows the filter screen 7 to rotate smoothly.

[0018] Specifically, the ball bearing 901 can reduce the friction between the filter screen 7 and the support frame 9, allowing the filter screen 7 to rotate smoothly.

[0019] exist Figure 3 and Figure 4 In the middle: the intake pipe 2 has a sliding connection of a limiting ring 8, which is used to support and limit the filter screen 7. The outer surface of the limiting ring 8 is symmetrically provided with annular plates 801, and the intake pipe 2 has an annular groove 802 that forms a sliding structure with the annular plates 801.

[0020] Specifically, the support and limiting of the limiting ring 8 can be achieved through the cooperation of the annular plate 801 and the annular groove 802.

[0021] exist Figures 2-6 In the middle: The inner side of the limiting ring 8 is connected to a filter screen 7 for filtration. The filter screen 7 is set in a funnel shape. The filter screen 7 is made of PTFE membrane metal filter screen with stainless steel mesh as the base material and polytetrafluoroethylene microporous membrane on the surface. An annular baffle is provided on the side of the filter screen 7 near the support frame 9.

[0022] Specifically, filter screen 7 is used to intercept large particles in the flue gas to reduce the wear on the catalyst; annular baffles are used to block particles and prevent them from moving outside the filter screen 7. The rotation of filter screen 7 generates centrifugal force, which causes large particles to move towards the edge of filter screen 7, preventing filter screen 7 from clogging. The dynamic rotation also continuously refreshes the flue gas contact surface, improving the particle interception efficiency and avoiding uneven airflow distribution caused by local blockage.

[0023] exist Figure 3 and Figure 4 In the middle: 7 has pull rings symmetrically arranged on the side of the filter screen near the support frame 9.

[0024] Specifically, after removing the sealing cover 201, the support frame 9 separates from the filter screen 7. At this time, the clip 701 on the surface of the filter screen 7 can be separated from the slot 702 by pulling the pull ring outward, which facilitates disassembly for cleaning or replacement.

[0025] exist Figures 3-5 In the middle: a slot 702 is provided at an equal angle on the inner side of the limiting ring 8. The slot 702 is engaged with a strip 701 that is connected to the filter screen 7. The strip 701 and the slot 702 cooperate to make the limiting ring 8 and the filter screen 7 move synchronously.

[0026] Specifically, the positioning between the filter screen 7 and the limiting ring 8 can be achieved through the cooperation of the card strip 701 and the card slot 702, so that the limiting ring 8 and the filter screen 7 can move synchronously.

[0027] exist Figure 2In the middle section: An installation bracket 6 is provided inside the air inlet pipe 2 on the side close to the denitrification tower 1. An impeller 601 is rotatably connected to the side of the installation bracket 6 away from the denitrification tower 1. The impeller 601 is made of 316L stainless steel to avoid jamming or damage caused by acidic components in the flue gas. The impeller 601 is used to drive the filter screen 7 to rotate.

[0028] Specifically, the high-speed flue gas passing through the filter screen 7 drives the impeller 601. Since the impeller 601 and the filter screen 7 are connected by the docking plate 10 and the docking groove 11, and the limiting plate and the air inlet pipe 2 are slidably connected by the annular plate 801 and the annular groove 802, the filter screen 7 and the limiting plate rotate together.

[0029] exist Figure 2 and Figure 5 In the middle: A docking plate 10 is fixedly connected to the side of the impeller 601 away from the mounting bracket 6. The filter screen 7 is provided with a docking groove 11 on the side close to the impeller 601, which forms a locking structure with the docking plate 10. Both the docking plate 10 and the docking groove 11 are polygonal. The docking plate 10 and the docking groove 11 cooperate to make the filter screen 7 move synchronously with the impeller 601.

[0030] Specifically, when the docking plate 10 and the docking groove 11 are engaged, the filter screen 7 and the impeller 601 can form an integral structure so that they can rotate synchronously.

[0031] The high-temperature flue gas discharged from the incinerator first passes through the waste heat boiler, and then is sent to the heating pipe 4 through the connecting pipe. The heating pipe 4 is wrapped around the ammonia supply pipe 3 so that the heating pipe 4 can use the waste heat to heat the ammonia supply pipe 3, thereby maintaining the optimal temperature of the ammonia supply pipe 3 and preventing ammonia crystallization blockage. Then the flue gas is introduced into the denitrification tower 1 through the air inlet pipe 2 for denitrification treatment. During this process, large particles in the flue gas are intercepted by the detachable filter screen 7 installed in the air inlet pipe 2 to reduce the wear on the catalyst. The high-speed flue gas passing through the filter screen 7 drives the impeller 601, the filter screen 7, and the limiting plate to rotate together. The centrifugal force generated by the rotation causes large particles to move towards the edge of the filter screen 7, preventing the filter screen 7 from clogging. Electrical equipment (including but not limited to motors, electric actuators, etc.) is safely powered by an external power source and controlled by a control box. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste incineration power generation flue gas denitrification and heating device, comprising a denitrification tower (1), wherein an exhaust pipe (5) for exhausting gas is provided at the top of the denitrification tower (1), and an ammonia supply pipe (3) and an air inlet pipe (2) are arranged sequentially from top to bottom on one side of the denitrification tower (1), wherein a heating pipe (4) connected to the air inlet pipe (2) is wound around the outside of the ammonia supply pipe (3) so as to utilize waste heat to heat the ammonia supply pipe (3); characterized in that, The side of the air inlet pipe (2) away from the denitrification tower (1) is threaded with a sealing cap (201). A retainer (9) is provided on the inner side of the sealing cap (201). A limit ring (8) is slidably connected inside the air inlet pipe (2). A filter screen (7) for filtration is engaged on the inner side of the limit ring (8). A mounting bracket (6) is provided on the side of the air inlet pipe (2) near the denitrification tower (1). An impeller (601) is rotatably connected on the side of the mounting bracket (6) away from the denitrification tower (1) to drive the filter screen (7) to rotate. A docking plate (10) is fixedly connected on the side of the impeller (601) away from the mounting bracket (6). A docking groove (11) is opened on the side of the filter screen (7) near the impeller (601) to form a engaging structure with the docking plate (10).

2. The waste incineration power generation flue gas denitrification and heating device according to claim 1, characterized in that, The abutment (9) includes an annular limiting plate and a limiting rod fixed at an equal angle between the annular limiting plate and the sealing cover (201). A ball bearing (901) is rolled inside one side of the abutment (9), and the ball bearing (901) is used to make the filter screen (7) rotate smoothly.

3. The waste incineration power generation flue gas denitrification and heating device according to claim 1, characterized in that, The outer surface of the limiting ring (8) is symmetrically provided with annular plates (801), and the interior of the air intake pipe (2) is provided with annular grooves (802) that form a sliding structure with the annular plates (801). The annular plates (801) and annular grooves (802) cooperate to support and limit the limiting ring (8).

4. The waste incineration power generation flue gas denitrification and heating device according to claim 2, characterized in that, The filter screen (7) is configured as a funnel-shaped structure, and the filter screen (7) is a PTFE-coated metal filter screen with stainless steel mesh as the base material and polytetrafluoroethylene microporous membrane on the surface. An annular baffle is provided on the side of the filter screen (7) near the support frame (9). Pull rings are symmetrically provided on the side of the filter screen (7) near the support frame (9).

5. A waste incineration power generation flue gas denitrification and heating device according to claim 3, characterized in that, The inner side of the limiting ring (8) is provided with a slot (702) at equal angles. The slot (702) is connected to a strip (701) that is connected to the filter screen (7). The strip (701) and the slot (702) cooperate to make the limiting ring (8) and the filter screen (7) move synchronously.

6. The waste incineration power generation flue gas denitrification and heating device according to claim 1, characterized in that, The impeller (601) is made of 316L stainless steel to avoid jamming or damage caused by acidic components in the flue gas; the docking plate (10) and the docking groove (11) are both set as polygons, and the docking plate (10) and the docking groove (11) cooperate to make the filter screen (7) move synchronously with the impeller (601).

7. A waste incineration power generation flue gas denitrification and heating device according to claim 1, characterized in that, A connecting pipe is provided on one side of the heating pipeline (4), one end of which is connected to the waste heat boiler, and the waste heat boiler is connected to the output end of the incinerator.

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