Hazardous waste incineration flue gas waste heat recovery device

Abstract

The utility model relates to a hazardous waste incineration flue gas waste heat recovery device which is applied to an incinerator, an exhaust pipe is arranged at the top of the incinerator, a material return pipe is arranged at the bottom of the incinerator, the hazardous waste incineration flue gas waste heat recovery device comprises a separation assembly and a heat exchange assembly, the top of the separation box is provided with an air inlet communicated with the exhaust pipe, the bottom of the separation box is provided with a discharging port communicated with the material returning pipe, the filtering piece is arranged in the separation box and provided with a filtering cavity used for intercepting solid particles outside the filtering cavity, one end of the air feeding pipe is communicated with the filtering cavity, and the other end of the air feeding pipe extends out of the separation box; the heat exchange assembly is provided with a first heat exchange end, a second heat exchange end and a third heat exchange end, the first heat exchange end extends to the position between the air inlet and the filter part, the second heat exchange end extends to the position between the discharge port and the filter part, and the third heat exchange end extends into the air supply pipe; the problem that heat contained in solid particles is not reasonably utilized is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hazardous waste treatment, in particular to a hazardous waste incineration flue gas waste heat recovery device. Background Art

[0002] During the incineration process of hazardous waste treatment, high-temperature flue gas will be generated. During the treatment of high-temperature flue gas, a heat exchanger can be used to exchange heat for the high-temperature flue gas to achieve waste heat recovery. Before heat exchange, solid particles mixed in the flue gas need to be filtered to avoid affecting the efficiency of flue gas heat exchange and subsequent treatment of the flue gas.

[0003] For example, the utility model patent with application number CN202020953675.9 proposes a garbage incineration device with waste heat recovery, in which the flue gas delivery pipeline is gradually enlarged through the first flue pipe, the second flue pipe and the third flue pipe, which is beneficial to the flue gas in the first dust collecting pipe to be fully filtered. Through the setting of the second filter net, the flue gas generated in the combustion furnace body can be initially filtered, and through the setting of the first filter net, the flue gas can be further filtered for the second time. The first dust collecting pipe and the second dust collecting pipe are detachably connected, which is convenient for the user to disassemble the first dust collecting pipe and the second dust collecting pipe, and then take out the first filter net and the second filter net for ash removal and cleaning, so as to avoid large particles of solid affecting the waste heat recovery of the flue gas.

[0004] However, the heat contained in the solid particles is not properly utilized. Utility Model Content

[0005] In view of this, it is necessary to provide a waste heat recovery device for hazardous waste incineration flue gas to solve the problem that the heat contained in the solid particles is not reasonably utilized.

[0006] The utility model provides a waste heat recovery device for hazardous waste incineration flue gas, which is applied to an incinerator. An exhaust pipe is arranged on the top of the incinerator, and a return pipe is arranged on the bottom thereof, including a separation component and a heat exchange component. The separation component includes a separation box, a filter element and an air supply pipe. The top of the separation box is provided with an air inlet connected to the exhaust pipe, and the bottom of the separation box is provided with an outlet connected to the return pipe. The filter element is built into the separation box and the filter element has a filter cavity for intercepting solid particles outside the filter cavity. One end of the air supply pipe is connected to the filter cavity, and the other end extends to the outside of the separation box. The heat exchange component has a first heat exchange end, a second heat exchange end and a third heat exchange end. The first heat exchange end extends to a position between the air inlet and the filter element, the second heat exchange end extends to a position between the outlet and the filter element, and the third heat exchange end extends into the air supply pipe.

[0007] Furthermore, the filter element includes two partitions and an annular filter screen which are arranged in sequence and parallel to each other along the direction of the air inlet pointing to the outlet, the two partitions are fixedly connected to the interior of the separation box, the opposite sides of the two partitions are connected to the annular filter screen, and form the filter cavity with the annular filter screen, and the air supply pipe passes through one of the partitions and extends into the filter cavity.

[0008] Furthermore, it also includes a plurality of connecting rods, and the opposite sides of the two partitions are fixedly connected to the inner wall of the separation box via the plurality of connecting rods.

[0009] Furthermore, both of the two partitions are circular plates, the outer diameter of the partition facing the air inlet is smaller than the outer diameter of the partition facing the outlet, and the inner diameter of the annular filter gradually expands in the direction from the air inlet to the outlet.

[0010] Furthermore, a valve is installed at the discharge port of the separation box.

[0011] Furthermore, the heat exchange assembly includes a water tank, and the first heat exchange end, the second heat exchange end and the third heat exchange end all extend into the water tank.

[0012] Furthermore, the first heat exchange end is a U-shaped heat exchange tube, both ends of the U-shaped heat exchange tube are connected to the water tank, and the turning point of the U-shaped heat exchange tube is located in the separation box.

[0013] Furthermore, the second heat exchange end is a U-shaped heat exchange tube, both ends of the U-shaped heat exchange tube are connected to the water tank, and the turning point of the U-shaped heat exchange tube is located in the separation box.

[0014] Furthermore, the second heat exchange end is arranged close to the discharge port.

[0015] Furthermore, the third heat exchange end is a heat exchange fin, one side of the heat exchange fin extends into the water tank, and the other side extends into the air supply pipe.

[0016] Compared with the prior art, the flue gas containing solid particles discharged from the exhaust pipe of the incinerator is introduced into the separation box from the air inlet, and the first heat exchange end of the heat exchange component performs preliminary heat exchange treatment on the flue gas and the solid particles contained therein. After being filtered by the filter element, the solid particles undergo heat exchange treatment with the second heat exchange end of the heat exchange component when passing through the discharge port of the separation box, and finally flow back to the incinerator. At the same time, the flue gas flows into the filter cavity and is introduced into the air supply pipe. The third heat exchange end of the heat exchange component performs heat exchange treatment on the flue gas, which can not only effectively recover the waste heat in the flue gas but also collect the waste heat in the solid particles, and has high heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of the hazardous waste incineration flue gas waste heat recovery device connected with the incineration rate as a whole in an embodiment of the utility model;

[0018] Figure 2 The overall internal schematic diagram of the hazardous waste incineration flue gas waste heat recovery device provided in the embodiment of the utility model;

[0019] Figure 3 The hazardous waste incineration flue gas waste heat recovery device provided by the utility model embodiment Figure 2 Sectional view of the middle AA plane;

[0020] Figure 4 The hazardous waste incineration flue gas waste heat recovery device provided by the utility model embodiment Figure 2 Sectional view along the middle BB plane. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0022] like Figure 1-2 As shown, the utility model provides a waste heat recovery device for hazardous waste incineration flue gas, which is applied to an incinerator 100. The top of the incinerator 100 is provided with an exhaust pipe 110, and the bottom thereof is provided with a return pipe 120, including a separation component 200 and a heat exchange component 300. The separation component 200 includes a separation box 210, a filter element 220 and an air supply pipe 230. The top of the separation box 210 is provided with an air inlet 211 connected to the exhaust pipe 110, and the bottom thereof is provided with an outlet 212 connected to the return pipe 120. The filter element 220 is built in The separation box 210 and the filter element 220 have a filter cavity for intercepting solid particles outside the filter cavity. One end of the air supply pipe 230 is connected to the filter cavity, and the other end extends to the outside of the separation box 210. The heat exchange component 300 has a first heat exchange end 310, a second heat exchange end 320 and a third heat exchange end 330. The first heat exchange end 310 extends to a position between the air inlet 211 and the filter element 220, the second heat exchange end 320 extends to a position between the discharge port 212 and the filter element 220, and the third heat exchange end 330 extends to the air supply pipe.

[0023] During implementation, the flue gas containing solid particles discharged from the exhaust pipe 110 of the incinerator 100 is introduced into the separation box 210 from the air inlet 211, and the first heat exchange end 310 of the heat exchange component 300 performs preliminary heat exchange treatment on the flue gas and the solid particles contained therein. After being filtered by the filter element 220, the solid particles undergo heat exchange treatment with the second heat exchange end 320 of the heat exchange component 300 when passing through the discharge port 212 of the separation box 210, and finally flow back to the incinerator 100. At the same time, the flue gas flows into the filter cavity and is introduced into the air supply pipe 230. The third heat exchange end 330 of the heat exchange component 300 performs heat exchange treatment on the flue gas, which can not only effectively recover the waste heat in the flue gas but also collect the waste heat in the solid particles, and has a high heat exchange efficiency.

[0024] The separation component 200 in this embodiment is used to separate solid particles trapped in the flue gas. The separation component 200 includes a separation box 210, a filter element 220 and an air supply pipe 230. The top of the separation box 210 is provided with an air inlet 211 connected to the exhaust pipe 110, and the bottom is provided with an outlet 212 connected to the return pipe 120. The filter element 220 is built into the separation box 210 and the filter element 220 has a filter cavity for intercepting solid particles outside the filter cavity. One end of the air supply pipe 230 is connected to the filter cavity, and the other end extends to the outside of the separation box 210.

[0025] In one embodiment, the filter element 220 includes two partitions 221 and an annular filter screen 222 which are arranged in sequence and parallel to each other along the direction of the air inlet 211 pointing to the discharge port 212. The two partitions 221 are fixedly connected to the interior of the separation box 210. The opposite sides of the two partitions 221 are connected to the annular filter screen 222 and form a filter cavity with the annular filter screen 222. The air supply pipe 230 passes through one of the partitions 221 and extends into the filter cavity.

[0026] In order to facilitate the fixing of the partition 221 , the present embodiment further includes a plurality of connecting rods 223 , and the opposite sides of the two partitions 221 are fixedly connected to the inner wall of the separation box 210 via the plurality of connecting rods 223 .

[0027] The two partitions 221 are both circular plates, the outer diameter of the partition 221 facing the air inlet 211 is smaller than the outer diameter of the partition 221 facing the discharge port 212 , and the inner diameter of the annular filter 222 gradually expands in the direction from the air inlet 211 to the discharge port 212 .

[0028] It is understandable that, in order to facilitate cleaning of the annular filter 222 , a vibration motor may be installed on the annular filter 222 .

[0029] In order to effectively recover the heat energy contained in the solid particles, in one embodiment, a valve 213 is installed at the discharge port 212 of the separation box 210 to extend the time that the solid particles stay in the separation box 210 .

[0030] It is understandable that the fan 231 can provide power for the flow of smoke in the air supply pipe 230 .

[0031] The heat exchange component 300 in this embodiment has a first heat exchange end 310, a second heat exchange end 320 and a third heat exchange end 330. The first heat exchange end 310 extends to a position between the air inlet 211 and the filter element 220, the second heat exchange end 320 extends to a position between the discharge port 212 and the filter element 220, and the third heat exchange end 330 extends into the air supply pipe.

[0032] In one embodiment, the heat exchange assembly 300 includes a water tank, and the first heat exchange end 310, the second heat exchange end 320, and the third heat exchange end 330 all extend into the water tank.

[0033] like Figure 3 As shown, in one embodiment, the first heat exchange end 310 is a U-shaped heat exchange tube, both ends of the U-shaped heat exchange tube are connected to the water tank, and the turning point of the U-shaped heat exchange tube is located in the separation box 210.

[0034] like Figure 4 As shown, in one embodiment, the second heat exchange end 320 is a U-shaped heat exchange tube, both ends of the U-shaped heat exchange tube are connected to the water tank, and the turning point of the U-shaped heat exchange tube is located in the separation box 210. The second heat exchange end 320 is arranged close to the discharge port 212.

[0035] In one embodiment, the third heat exchange end 330 is a heat exchange fin, one side of the heat exchange fin extends into the water tank, and the other side of the heat exchange fin extends into the air supply pipe 230 .

[0036] Compared with the prior art: the flue gas containing solid particles discharged from the exhaust pipe 110 of the incinerator 100 is introduced into the separation box 210 from the air inlet 211, and the first heat exchange end 310 of the heat exchange component 300 performs preliminary heat exchange treatment on the flue gas and the solid particles contained therein. After being filtered by the filter element 220, the solid particles undergo heat exchange treatment with the second heat exchange end 320 of the heat exchange component 300 when passing through the discharge port 212 of the separation box 210, and finally flow back to the incinerator 100. At the same time, the flue gas flows into the filter cavity and is introduced into the air supply pipe 230. The third heat exchange end 330 of the heat exchange component 300 performs heat exchange treatment on the flue gas, which can not only effectively recover the waste heat in the flue gas but also collect the waste heat in the solid particles, and has a high heat exchange efficiency.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat recovery device for hazardous waste incineration flue gas, applied to an incinerator, wherein an exhaust pipe is provided at the top of the incinerator and a return pipe is provided at the bottom thereof, characterized in that: including a separation component and a heat exchange component; The separation assembly comprises a separation box, a filter element and an air supply pipe, the top of the separation box is provided with an air inlet connected to the exhaust pipe, and the bottom is provided with an outlet connected to the return pipe, the filter element is built into the separation box and has a filter cavity for intercepting solid particles outside the filter cavity, one end of the air supply pipe is connected to the filter cavity, and the other end extends to the outside of the separation box; The heat exchange component has a first heat exchange end, a second heat exchange end and a third heat exchange end. The first heat exchange end extends to a position between the air inlet and the filter element, the second heat exchange end extends to a position between the discharge port and the filter element, and the third heat exchange end extends into the air supply pipe.

2. The hazardous waste incineration flue gas waste heat recovery device according to claim 1 is characterized in that: The filter element includes two partitions and an annular filter screen which are arranged in sequence and parallel to each other along the direction from the air inlet to the discharge port. The two partitions are fixedly connected to the interior of the separation box, and the opposite sides of the two partitions are connected to the annular filter screen to form the filter cavity. The air supply pipe passes through one of the partitions and extends into the filter cavity.

3. The hazardous waste incineration flue gas waste heat recovery device according to claim 2 is characterized in that: It also includes a plurality of connecting rods, and the opposite sides of the two partitions are fixedly connected to the inner wall of the separation box via the plurality of connecting rods.

4. The hazardous waste incineration flue gas waste heat recovery device according to claim 3 is characterized in that: The two partitions are both circular plates, the outer diameter of the partition facing the air inlet is smaller than the outer diameter of the partition facing the discharge port, and the inner diameter of the annular filter gradually expands in the direction from the air inlet to the discharge port.

5. The hazardous waste incineration flue gas waste heat recovery device according to claim 1 is characterized in that: A valve is installed at the discharge port of the separation box.

6. The hazardous waste incineration flue gas waste heat recovery device according to claim 1 is characterized in that: The heat exchange assembly includes a water tank, and the first heat exchange end, the second heat exchange end, and the third heat exchange end all extend into the water tank.

7. The hazardous waste incineration flue gas waste heat recovery device according to claim 6, characterized in that: The first heat exchange end is a U-shaped heat exchange tube, both ends of the U-shaped heat exchange tube are connected to the water tank, and the turning point of the U-shaped heat exchange tube is located in the separation box.

8. The hazardous waste incineration flue gas waste heat recovery device according to claim 6, characterized in that: The second heat exchange end is a U-shaped heat exchange tube, both ends of the U-shaped heat exchange tube are connected to the water tank, and the turning point of the U-shaped heat exchange tube is located in the separation box.

9. The hazardous waste incineration flue gas waste heat recovery device according to claim 8, characterized in that: The second heat exchange end is arranged close to the discharge port.

10. The hazardous waste incineration flue gas waste heat recovery device according to claim 6, characterized in that: The third heat exchange end is a heat exchange fin, one side of the heat exchange fin extends into the water tank, and the other side extends into the air supply pipe.

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