Heat exchange device suitable for low-order pulverized coal

Abstract

The utility model discloses a heat exchange device suitable for low-order pulverized coal. The heat exchange device suitable for the low-order pulverized coal comprises a heat exchanger and a shaking device used for driving the heat exchanger to shake, the shaking device comprises a shaking driver, a connecting rod and a traction piece, one end of the traction piece is fixed to the heat exchanger, and the other end of the traction piece is fixed to the connecting rod. The connecting rod is connected with the shaking driver, the shaking driver is used for driving the connecting rod to move up and down in a reciprocating mode, and the connecting rod is used for pulling the heat exchanger to shake through the traction piece. The heat exchange device suitable for the low-order pulverized coal can prevent the pulverized coal from caking in the furnace body.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature dry distillation of pulverized coal, in particular to a heat exchange device suitable for low-rank pulverized coal. Background Art

[0002] Low-grade pulverized coal undergoes low-temperature carbonization, requiring an oxygen-free environment between 400-450°C for upgrading. However, the small gaps between pulverized coal particles prevent flue gas from flowing smoothly within the pulverized coal pile, making it impossible to directly feed the flue gas into the furnace for heat exchange. Therefore, a heat exchanger is required to transfer heat between the flue gas and the pulverized coal. Conventional heat exchangers are fixed within the furnace and cannot be moved. During use, the pulverized coal easily agglomerates around the heat exchanger, preventing smooth movement of the pulverized coal within the furnace. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a heat exchange device which can shake and is suitable for low-grade pulverized coal.

[0004] In order to solve the above problems, the utility model provides a heat exchange device suitable for low-grade pulverized coal, the heat exchange device suitable for low-grade pulverized coal includes a heat exchanger and a shaking device for driving the heat exchanger to shake, the shaking device includes a shaking driver, a connecting rod and a traction member, one end of the traction member is fixed on the heat exchanger, and the other end of the traction member is fixed on the connecting rod, the connecting rod is connected to the shaking driver, the shaking driver is used to drive the connecting rod to move back and forth up and down, and the connecting rod is used to pull the heat exchanger to shake through the traction member.

[0005] Furthermore, it also includes a mounting frame, and the dither driver is mounted on the mounting frame.

[0006] Furthermore, both sides of the connecting rod are connected to traction members.

[0007] Furthermore, the shaking driver is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0008] Furthermore, the heat exchanger has a flue gas inlet pipe and a flue gas outlet pipe extending out of the furnace body, and flexible sealing rings are provided on the flue gas inlet pipe and the flue gas outlet pipe.

[0009] Furthermore, the smoke inlet pipe and the smoke outlet pipe are both connected with flexible connecting pipes.

[0010] Furthermore, the flue gas inlet pipe is connected to a temperature compensator via a flexible connecting pipe, the temperature compensator is connected to a flue gas delivery pipe, and the flue gas outlet pipe is connected to a flue gas collection pipe via a flexible connecting pipe.

[0011] Furthermore, the heat exchanger also has a temperature compensation tube extending out of the furnace body, and a burner is provided on the temperature compensation tube.

[0012] Furthermore, the temperature compensating tube is provided with a flexible connecting tube, and the burner is connected to the flexible connecting tube.

[0013] Furthermore, a flexible sealing ring is provided on the upper ring of the temperature compensation tube.

[0014] The utility model is suitable for a heat exchange device for low-grade pulverized coal. The heat exchange device utilizes a shaking driver to drive a connecting rod. The connecting rod drives the heat exchanger to shake through a traction member, thereby loosening the pulverized coal near the heat exchanger and preventing it from agglomerating. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a furnace body equipped with the heat exchange device of the utility model.

[0016] Figure 2 It is a structural diagram of the shaking device.

[0017] Figure 3 It is the distribution diagram of the heat exchanger in the furnace body.

[0018] Figure 4 It is a schematic diagram of the flow of flue gas in the heat exchanger.

[0019] Figure 5 It is a structural diagram of the flue gas inlet pipe and temperature compensation tube.

[0020] Figure 6 yes Figure 4 A partial enlarged view of middle A.

[0021] The meanings of the reference numerals in the accompanying drawings are:

[0022] Furnace body 1, heat exchanger 2, flue gas outlet pipe 21, flue gas inlet pipe 22, first air inlet pipe body 221, first dispersion pipe body 222, first baffle 223, first air inlet cavity 2201, first dispersion cavity 2202, temperature compensation tube 23, second air inlet pipe body 231, second dispersion pipe body 232, second baffle 233, second air inlet cavity 2301, second dispersion cavity 2302, heat exchange tube 24, flexible sealing ring 25, shaking device 3, shaking driver 31, connecting rod 32, traction part 33, mounting bracket 4, temperature compensator 5, burner 51, heating box 52, flue gas supply pipe 6, flue gas collection pipe 7, flexible connecting pipe 8. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1As shown, a preferred embodiment of the heat exchange device of the present invention includes a heat exchanger 2, a shaking device 3 and a mounting bracket 4. The heat exchanger 2 is located inside the furnace body 1, and there are multiple heat exchangers 2. The heat exchanger 2 is used to exchange heat with pulverized coal, that is, to heat the pulverized coal. Each of the heat exchangers 2 is connected to a shaking device 3, that is, there are multiple shaking devices, and each shaking device 3 corresponds to a heat exchanger 2. The shaking device 3 is used to drive the heat exchanger 2 to shake. The mounting bracket 4 is provided inside and outside the furnace body 1, and the shaking device 3 is installed on the mounting bracket 4. The shaking device 3 passes through the furnace top and is connected to the heat exchanger 2. The shaking device 3 drives the heat exchanger 2 to shake, so that the pulverized coal near the heat exchanger 2 is not easy to agglomerate. In other embodiments, the shaking device 3 can also be installed on the furnace top without the need for a mounting bracket 4.

[0025] refer to Figure 1 、 Figure 2 and Figure 3 Each shaking device 3 includes a shaking driver 31, a connecting rod 32, and a pulling member 33. The shaking driver 31 is mounted on the mounting frame 4 and is used to provide the shaking power. Two shaking drivers 31 are provided, one on each side of the furnace body 1, corresponding to the ends of the heat exchanger 2. Each shaking driver 31 is a hydraulic cylinder; however, a pneumatic cylinder, an electric cylinder, or other lifting device can also be used. Each end of the connecting rod 32 is connected to the two shaking drivers 31, which drive the connecting rod 32 up and down. The connecting rod 32 is made of I-beam steel to reduce costs. One end of the pulling member 33 is fixed to the heat exchanger 2, and the other end is fixed to the connecting rod 32. The pulling member 33 is a pulling tube or a pulling rope. Pulling members 33 are connected to both sides of the connecting rod 32, ensuring a more stable force on the heat exchanger 2. The shaking driver 31 drives the connecting rod 32 to move up and down reciprocatingly, the connecting rod 32 drives the traction member 33 to move up and down, and the traction member 33 pulls the heat exchanger 2 to move up and down reciprocatingly, thereby causing the heat exchanger 2 to shake.

[0026] like Figures 4 to 6 As shown, the heat exchanger 2 includes a flue gas inlet pipe 22, a flue gas outlet pipe 21, a temperature compensation pipe 23, and heat exchange pipes 24 extending from the furnace body 1. The flue gas inlet pipe 22 is located below the flue gas outlet pipe 21, and the temperature compensation pipe 23 is located between the flue gas outlet pipe 21 and the flue gas inlet pipe 22. The temperature compensation pipes 23 are connected to the flue gas outlet pipe 21 via four rows of heat exchange pipes 24; the temperature compensation pipes 23 are connected to each other via four rows of heat exchange pipes 24; and the temperature compensation pipes 23 are connected to the flue gas inlet pipe 22 via four rows of heat exchange pipes 24. The heat exchange pipes 24 in each row are spaced evenly apart.

[0027] The flue gas inlet pipe 22 is used to introduce high-temperature flue gas and send it into the heat exchange pipe 24; the heat exchange pipe 24 is used to exchange heat with pulverized coal. Both ends of the flue gas inlet pipe 22 extend out of the furnace body 1. The flue gas inlet pipe 22 is surrounded by a flexible sealing ring 25. The flexible sealing ring 25 is used to seal the gap between the flue gas inlet pipe 22 and the furnace body 1. This ensures that when the flue gas inlet pipe 22 vibrates with the heat exchanger 2, the flexible sealing ring 25 can deform, so that the flue gas inlet pipe 22 and the furnace body 1 are always in a sealed state. The flue gas inlet pipe 22 is connected to a temperature compensator 5. The temperature compensator 5 is used to increase the temperature of the flue gas to ensure that the flue gas sent to the heat exchanger 2 is always within the design requirements. The flue gas inlet pipe 22 is connected to a flexible connecting pipe 8, which facilitates the connection between the flue gas inlet pipe 22 and the temperature compensator 5. In other words, when the heat exchanger 2 vibrates, the flue gas inlet pipe 22 will vibrate accordingly, but the temperature compensator 5 will not vibrate accordingly, while also ensuring the connection between the flexible connecting pipe 8 and the temperature compensator 5. The temperature compensator 5 is connected to the flue gas supply pipe 6, that is, all temperature compensators 5 are connected to the flue gas supply pipe 6.

[0028] The flue gas inlet pipe 22 includes a first inlet pipe body 221 and a first dispersion pipe body 222. The first dispersion pipe body 222 is mounted on the first inlet pipe body 221. The first inlet pipe body 221 has a first inlet cavity 2201, and the first dispersion pipe body 222 has a first dispersion cavity 2202. The heat exchange pipe 24 is mounted on the first dispersion pipe body 222 and communicates with the first dispersion cavity 2202. Both the first inlet pipe body 221 and the first dispersion pipe body 222 are provided with through holes. The through holes in the first inlet cavity 2201 align with the through holes in the first dispersion cavity 2202, allowing the first inlet cavity 2201 and the first dispersion cavity 2202 to communicate. This allows flue gas to enter the first dispersion cavity 2202 from the first inlet cavity 2201 and then enter the heat exchange pipe 24 for heat exchange. Both ends of the first inlet cavity 2201 are air inlets, increasing the air intake speed. The through hole of the first air inlet cavity 2201 is located in the middle of the first air inlet cavity 2201, and the through hole of the first dispersion cavity 2202 is located in the middle of the first dispersion cavity 2202. A first baffle 223 for dispersing smoke is also provided in the first dispersion cavity 2202. The position of the first baffle 223 is located in the middle of the first dispersion cavity 2202, so that the first baffle 223 corresponds to the position of the through hole. After the smoke enters the first dispersion cavity 2202, it is first dispersed by the first baffle 223 and then enters the heat exchange tube 24. The smoke is distributed as evenly as possible before entering the heat exchange tube 24 connected to the first dispersion cavity 2202, thereby ensuring that the temperature of the heat exchange tube 24 connected to the first dispersion cavity 2202 remains consistent. In other embodiments, the flue gas inlet pipe 22 can also be a larger pipe, and two opposing partitions are arranged in the pipe to divide the internal space of the pipe into a first air inlet cavity 2201 and a first dispersion cavity 2202. The first air inlet cavity 2201 is below the partition plate, and the first dispersion cavity 2202 is above the partition plate. A gap is left between the partition plates to ensure that the first air inlet cavity 2201 and the first dispersion cavity 2202 are connected.

[0029] The temperature compensator 5 includes a burner 51 and a heating box 52. The burner 51 is mounted on the heating box 52, and the flue gas supply pipe 6 is connected to the heating box 52. The flue gas supply pipe 6 delivers flue gas into the heating box 52, and the burner 51 heats the flue gas in the heating box 52, so that the flue gas temperature can meet the design requirements.

[0030] The temperature compensating tube 23 is used to compensate for the temperature of the flue gas therein. Both ends of the temperature compensating tube 23 extend out of the furnace body 1. A flexible sealing ring 25 is provided around the temperature compensating tube 23. The flexible sealing ring 25 is used to seal the gap between the temperature compensating tube 23 and the furnace body 1, ensuring that when the temperature compensating tube 23 vibrates with the heat exchanger 2, the flexible sealing ring 25 can deform to ensure that the temperature compensating tube 23 and the furnace body 1 are always in a sealed state. The temperature compensating tube 23 is connected to a burner 51, which is used to increase the temperature of the flue gas within the temperature compensating tube 23, ensuring that the flue gas within the heat exchanger 2 is always within the design requirements. The flexible sealing ring 25 can be made of high-temperature resistant refractory cloth or other refractory materials. The temperature compensation tube 23 is connected to a flexible connecting tube 8, which makes it easy to connect the temperature compensation tube 23 to the burner 51; in other words, when the heat exchanger 2 shakes and the flue gas inlet pipe 22 follows the shaking, the burner 51 will not shake along, while also ensuring the connection between the flexible connecting tube 8 and the burner 51.

[0031] The temperature compensation tube 23 includes a second air intake pipe body 231 and a second dispersion pipe body 232. The second dispersion pipe body 232 is installed on the second air intake pipe body 231. The second air intake pipe body 231 has a second air intake cavity 2301. The second dispersion pipe body 232 has a second dispersion cavity 2302. The heat exchange tube 24 above the temperature compensation tube 23 is installed on the second dispersion pipe body 232 and is connected to the second dispersion cavity 2302. The heat exchange tube 24 below the temperature compensation tube 23 is installed on the second air intake pipe body 231 and is connected to the second air intake cavity 2301. Through holes are provided on both the second air inlet pipe body 231 and the second dispersion pipe body 232. The through holes on the second air inlet cavity 2301 align with the through holes on the second dispersion cavity 2302, allowing communication between the second air inlet cavity 2301 and the second dispersion cavity 2302. This allows flue gas in the heat exchange tube 24 below the temperature compensation tube 23 to enter the second dispersion cavity 2302 from the second air inlet cavity 2301, and then enter the heat exchange tube 24 above the temperature compensation tube 23 for heat exchange. Both ends of the second air inlet cavity 2301 have air inlets, increasing the air intake velocity. The through-hole of the second air inlet cavity 2301 is located in the middle of the second air inlet cavity 2301, and the through-hole of the second dispersion cavity 2302 is located in the middle of the second dispersion cavity 2302. A second baffle 233 for dispersing the flue gas is also provided in the second dispersion cavity 2302. The second baffle 233 is located in the middle of the second dispersion cavity 2302, so that the second baffle 233 and the through-hole are located correspondingly. After the flue gas enters the second dispersion cavity 2302, it is first dispersed by the second baffle 233 before entering the heat exchange tube 24. The flue gas is distributed as evenly as possible before entering the heat exchange tube 24 connected to the second dispersion cavity 2302, thereby ensuring that the temperature of the heat exchange tube 24 connected to the second dispersion cavity 2302 remains consistent. Depending on the height of the temperature compensating tube 23, the temperature of the flue gas heated by the heating device varies to ensure heat exchange requirements. In other embodiments, the temperature compensation tube 23 can also be a larger tube, with two opposing partition plates arranged inside the tube to divide the internal space of the tube into a second air inlet cavity 2301 and a second dispersion cavity 2302. The second air inlet cavity 2301 is located below the partition plate, and the second dispersion cavity 2302 is located above the partition plate. A gap is left between the partition plates to ensure that the second air inlet cavity 2301 and the second dispersion cavity 2302 are connected.

[0032] The flue gas outlet pipe 21 is used to collect flue gas after all heat exchange has been completed and discharge the flue gas out of the furnace body 1. Both ends of the flue gas outlet pipe 21 extend out of the furnace body 1. A flexible sealing ring 25 is provided on the flue gas outlet pipe 21. The flexible sealing ring 25 is used to seal the gap between the flue gas outlet pipe 21 and the furnace body 1. This ensures that when the flue gas outlet pipe 21 vibrates with the heat exchanger 2, the flexible sealing ring 25 can deform, so that the flue gas outlet pipe 21 and the furnace body 1 are always in a sealed state. The flue gas outlet pipe 21 is connected to the flue gas collection pipe 7, which is used to collect flue gas for convenient collection and harmless treatment. The flue gas outlet pipe 21 is connected to a flexible connecting pipe 8, which makes it convenient to connect the flue gas outlet pipe 21 with the flue gas collecting pipe 7; in other words, when the heat exchanger 2 shakes, the flue gas outlet pipe 21 follows the shaking, and the flue gas collecting pipe 7 will not shake along with it, while also ensuring the connection between the flexible connecting pipe 8 and the flue gas collecting pipe 7.

[0033] During use, the pulverized coal exchanges heat through the heat exchange tubes 24, that is, the heat exchange tubes 24 heat the pulverized coal. When shaking is required, the shaking driver 31 drives the connecting rod 32 to move up and down, and the connecting rod 32 drives the traction member 33 to move up and down, and the traction member 33 drives the heat exchanger 2 up and down, thereby making the pulverized coal near the heat exchanger 2 fluffy and less likely to clump. Regular shaking of the heat exchanger 2 is sufficient.

[0034] The above is only an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure made using the contents of the description and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present invention.

Claims

1. A heat exchange device suitable for low-grade pulverized coal, characterized by: It includes a heat exchanger and a shaking device for driving the heat exchanger to shake, the shaking device includes a shaking driver, a connecting rod and a traction member, one end of the traction member is fixed on the heat exchanger, and the other end of the traction member is fixed on the connecting rod, the connecting rod is connected to the shaking driver, the shaking driver is used to drive the connecting rod to move up and down, and the connecting rod is used to pull the heat exchanger to shake through the traction member.

2. The heat exchange device for low-grade pulverized coal according to claim 1, characterized in that: Also included is a mounting bracket on which the dither driver is mounted.

3. The heat exchange device for low-grade pulverized coal according to claim 1, characterized in that: Both sides of the connecting rod are connected with traction pieces.

4. The heat exchange device for low-grade pulverized coal according to claim 1, characterized in that: The shaking driver is a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

5. The heat exchange device for low-grade pulverized coal according to claim 1, characterized in that: The heat exchanger comprises a flue gas inlet pipe and a flue gas outlet pipe extending out of the furnace body, and flexible sealing rings are arranged on the flue gas inlet pipe and the flue gas outlet pipe.

6. The heat exchange device for low-grade pulverized coal according to claim 5, characterized in that: The smoke inlet pipe and the smoke outlet pipe are both connected with flexible connecting pipes.

7. The heat exchange device for low-grade pulverized coal according to claim 6, characterized in that: The flue gas inlet pipe is connected to a temperature compensator via a flexible connecting pipe, the temperature compensator is connected to a flue gas delivery pipe, and the flue gas outlet pipe is connected to a flue gas collecting pipe via a flexible connecting pipe.

8. The heat exchange device for low-grade pulverized coal according to claim 5, characterized in that: The heat exchanger further comprises a temperature compensation tube extending out of the furnace body, and a burner is provided on the temperature compensation tube.

9. The heat exchange device for low-grade pulverized coal according to claim 8, characterized in that: The temperature compensating tube is provided with a flexible connecting tube, and the burner is connected to the flexible connecting tube.

10. The heat exchange device suitable for low-grade pulverized coal according to claim 8, characterized in that: A flexible sealing ring is provided on the upper ring of the temperature compensation tube.

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