Low-temperature upgrading furnace

Abstract

The invention discloses a low-temperature upgrading furnace. The low-temperature upgrading furnace comprises a furnace body, a heat exchanger for heating pulverized coal in the furnace body, a shaking device for driving the heat exchanger to shake, a gas collecting device for collecting coal gas in the heated pulverized coal and a cooling device for cooling the heated pulverized coal, and the shaking device is connected with the heat exchanger; each gas collecting device comprises first gas collecting and distributing devices used for collecting coal gas, the first gas collecting and distributing devices are arranged in the horizontal direction, the adjacent first gas collecting and distributing devices are arranged in a staggered mode in the vertical direction, and the first gas collecting and distributing devices in the vertically adjacent gas collecting devices are arranged in a staggered mode in the horizontal direction; each cooling device comprises second gas collecting and distributing devices used for releasing cooling gas, the second gas collecting and distributing devices are arranged in the horizontal direction, the adjacent second gas collecting and distributing devices are arranged in a staggered mode in the vertical direction, and the second gas collecting and distributing devices in the vertically adjacent cooling devices are arranged in a staggered mode in the horizontal direction. Pulverized coal subjected to dry distillation of the low-temperature upgrading furnace is not prone to caking and fluffy.

Description

Technical Field

[0001] The invention relates to the technical field of low-temperature dry distillation, and in particular to a low-temperature upgrading furnace. Background Art

[0002] When low-grade pulverized coal is distilled at low temperature, it needs to be upgraded in an oxygen-free environment between 400-450°C. However, the gaps between particles in the pulverized coal are small, and the gas cannot flow smoothly in the pulverized coal pile, causing the pulverized coal to easily agglomerate in the furnace body, making the quality of the pulverized coal produced by low-temperature distillation uneven. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a low-temperature upgrading furnace which can prevent pulverized coal from agglomerating in the furnace body.

[0004] In order to solve the above problems, the present invention provides a low-temperature upgrading furnace, which includes a furnace body, a heat exchanger for heating pulverized coal in the furnace body, a shaking device for driving the heat exchanger to shake, a gas collecting device for collecting coal gas in the heated pulverized coal, and a cooling device for cooling the heated pulverized coal, the shaking device is connected to the heat exchanger, and the gas collecting device and the cooling device are located below the heat exchanger; the gas collecting device includes a first gas collector for collecting coal gas, the first gas collectors are arranged in the horizontal direction, and the adjacent first gas collectors are staggered in the vertical direction, and the first gas collectors in the upper and lower adjacent gas collecting devices are staggered in the horizontal direction; the cooling device includes a second gas collector for releasing cooling gas, the second gas collectors are arranged in the horizontal direction, and the adjacent second gas collectors are staggered in the vertical direction, and the second gas collectors in the upper and lower adjacent cooling devices are staggered in the horizontal direction.

[0005] Furthermore, the gas collecting device also includes a gas collecting box and a gas exhaust pipe. The gas collecting box is installed outside the furnace body, and both ends of each of the first gas collectors and distributors pass through the furnace body and extend into the gas collecting box. The gas exhaust pipe is installed on the gas collecting box to connect the gas collecting boxes at both ends of the first gas collectors and distributors.

[0006] Furthermore, the cooling device also includes a gas distribution box, the second gas distributor is installed inside the furnace body, the gas distribution box is installed outside the furnace body, both ends of the second gas distributor pass through the furnace body and extend into the gas distribution box, the gas distribution box is connected to a gas supply pipe, and the external cooling gas is delivered into the gas distribution box through the gas supply pipe.

[0007] Furthermore, the first gas collector and the second gas collector each include a collector-distributor connecting pipe, a collector-distributor box and a pulverized coal baffle, the collector-distributor connecting pipe is installed on the furnace body, the collector-distributor box is installed on the collector-distributor connecting pipe, the collector-distributor box is communicated with the connecting pipe, a gas channel is provided on the collector-distributor box, the gas channel of the collector-distributor box is used to collect coal gas, the pulverized coal baffle is installed on the collector-distributor box, and the pulverized coal baffle is inclinedly arranged on the collector-distributor box.

[0008] Furthermore, the collecting and distributing box is provided with a first vent and a second vent, the first vent and the second vent constitute a gas passage, the first vent is located on the side wall of the collecting and distributing box, and the second vent is located at the bottom of the collecting and distributing box.

[0009] Furthermore, there are a plurality of the first vents, and a plurality of rows of the first vents are arranged on the side wall of each side of the collecting and distributing box.

[0010] Furthermore, it also includes a discharger for discharging the cooled pulverized coal and a discharge hopper for receiving the pulverized coal discharged by the discharger, the discharger is installed on the furnace body, and the discharge hopper has a gas collecting interlayer, and the gas collecting interlayer is used to collect the coal gas in the hopper.

[0011] Furthermore, the discharge hopper includes a gathering hopper, a supporting hopper, a fixed rod and a pulverized coal retaining ring. The supporting hopper is installed in the gathering hopper through the fixed rod, and the pulverized coal retaining ring is installed on the gathering hopper or the fixed rod. The gap between the pulverized coal retaining ring and the inner wall of the gathering hopper forms a gas collecting interlayer, and the upper end of the pulverized coal retaining ring abuts against the inner wall of the gathering hopper. The upper end of the pulverized coal retaining ring abuts against the inner wall of the gathering hopper to close the upper end of the gas collecting interlayer.

[0012] Furthermore, an inspection port is provided on the aggregate hopper.

[0013] Furthermore, 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 reciprocally up and down, and the connecting rod is used to pull the heat exchanger to shake through the traction member.

[0014] The low-temperature upgrading furnace of the present invention utilizes a shaking device to drive the heat exchanger to shake, which can prevent the pulverized coal from agglomerating. The first gas collector and the second gas collector are staggered in the horizontal and vertical directions, so that the pulverized coal can avoid agglomeration when passing through the cooling device and the gas collecting device. Anti-agglomeration structures are provided at all locations prone to agglomeration, effectively ensuring the quality of the pulverized coal after low-temperature carbonization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a structural schematic diagram of a preferred embodiment of the low-temperature upgrading furnace of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure 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 schematic diagram of the structure of the flue gas inlet pipe and the temperature compensation pipe.

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

[0021] Figure 7 The distribution diagram of heat exchange tubes on the same horizontal plane

[0022] Figure 8 It is a structural diagram of the heat exchange tube.

[0023] Fig. 9 It is a schematic diagram of the internal structure of the heat exchange tube.

[0024] Fig.10 It is a cross-sectional view of BB.

[0025] Fig.11 It is a schematic diagram of the structure of the gas collecting device and the cooling device.

[0026] Fig.12 It is a distribution diagram of the first gas collector and the second gas collector.

[0027] Fig.13 It is a cross-sectional view of the first gas collector.

[0028] Fig.14 It is a cross-sectional view of CC.

[0029] Fig.15 It is a structural diagram of the discharger and the discharge hopper.

[0030] Fig.16 It is a top view of the discharge hopper.

[0031] Fig.17 It is a cross-sectional view of DD.

[0032] The meanings of the symbols in the accompanying drawings are:

[0033] Furnace body 1, heat exchanger 2, flue gas outlet pipe 21, flue gas inlet pipe 22, first inlet pipe body 221, first dispersion pipe body 222, first baffle 223, first inlet cavity 2201, first dispersion cavity 2202, temperature compensation tube 23, second inlet pipe body 231, second dispersion pipe body 232, second baffle 233, second inlet cavity 2301, second dispersion cavity 2302, heat exchange tube 24, heat exchange tube body 241, upper tube body 2411, dislocation tube body 2412, lower tube body 2413, heat exchange part 242, inner fin 2421, outer fin 243, flexible blocking ring 25, shaking device 3, shaking driver 31, connecting rod 32, traction Guide piece 33, mounting frame 4, temperature compensator 5, burner 51, heating box 52, flue gas supply pipe 53, flue gas collecting pipe 54, flexible connecting pipe 55, gas collecting device 6a, first gas collector 61, collecting and distributing connecting pipe 611, connecting opening 6111, collecting and distributing box 612, first air vent 6121, second air vent 6122, pulverized coal baffle 613, gas collecting box 62, coal gas exhaust pipe 63, cooling device 6b, second gas collector 64, gas distribution box 65, gas supply pipe 66, discharger 7, discharge hopper 8, gas collecting interlayer 80, collecting hopper 81, inspection port 811, support hopper 82, fixing rod 83, pulverized coal baffle ring 84, gas collecting pipe 85. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] like Figure 1 and Fig.15As shown, the preferred embodiment of the low-temperature upgrading furnace of the present invention includes a furnace body 1, a heat exchanger 2, a shaking device 3, a mounting frame 4, a gas collecting device 6a, a cooling device 6b, a discharger 7 and a discharge hopper 8. The heat exchanger 2 is located in the furnace body 1, and the furnace body 1 has a dry distillation section and a cooling gas collecting section. The dry distillation section is located above the cooling gas collecting section. After dry distillation in the dry distillation section, the pulverized coal slides to the cooling gas collecting section. The heat exchanger 2 is located in the dry distillation section. There are multiple heat exchangers 2. The heat exchanger 2 is used to exchange heat with the 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, each shaking device 3 corresponds to a heat exchanger 2, and the shaking device 3 is used to drive the heat exchanger 2 to shake. The mounting frame 4 is arranged inside and outside the furnace body 1, and the shaking device 3 is installed on the mounting frame 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 roof without the need for the mounting frame 4. There are multiple gas collecting devices 6a, which are arranged in the vertical direction. The gas collecting device 6a is used to collect the coal gas generated by the pulverized coal after carbonization. The cooling device 6b is used to cool the pulverized coal. The gas collecting device 6a and the cooling device 6b are both located in the cooling and gas collecting section of the furnace body 1. Usually, the cooling device 6b cools the lower end of the gas collecting section. In order to ensure that the coal gas is collected as much as possible, the gas collecting device 6a is usually arranged below the cooling device 6b. The discharger 7 is installed on the furnace body 1. The pulverized coal after cooling in the furnace body 1 is discharged through the discharger 7. The discharge hopper 8 is installed on the discharger 7. The discharge hopper 8 is used to receive and gather the pulverized coal discharged by the discharger 7, and collect the coal gas in the discharge hopper 8 at the same time. The discharge hopper 8 is provided with a gas collecting pipe 85, and the gas collecting pipe 85 is used to send the coal gas collected by the discharge hopper 8 to an external coal gas processing system.

[0036] refer to Figure 1 , Figure 2 and Figure 3Each of the shaking devices 3 includes a shaking driver 31, a connecting rod 32 and a traction member 33. The shaking driver 31 is mounted on the mounting frame 4. The shaking driver 31 is used to provide shaking power. There are two shaking drivers 31. The two shaking drivers 31 are distributed on both sides of the furnace body 1, that is, corresponding to the two ends of the heat exchanger 2; the shaking driver 31 is a hydraulic cylinder. Of course, a cylinder or an electric cylinder, or other equipment that can be lifted and lowered, can also be used. The two ends of the connecting rod 32 are respectively connected to the two shaking drivers 31, and the shaking driver 31 drives the connecting rod 32 to move up and down; the connecting rod 32 is made of I-beam, which is convenient for reducing costs. One end of the traction member 33 is fixed on the heat exchanger 2, and the other end of the traction member 33 is fixed on the connecting rod 32. The traction member 33 is a traction tube or a traction rope. Both sides of the connecting rod 32 are connected with traction members 33, so that the traction heat exchanger 2 is more stable. 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, so that the heat exchanger 2 shakes.

[0037] 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 a heat exchange pipe 24 extending out of 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 pipe 23 is connected to the flue gas outlet pipe 21 through four rows of heat exchange pipes 24; the temperature compensation pipe 23 is connected to the temperature compensation pipe 23 through four rows of heat exchange pipes 24; the temperature compensation pipe 23 is connected to the flue gas inlet pipe 22 through four rows of heat exchange pipes 24, and the heat exchange pipes 24 in each row are distributed at the same spacing.

[0038] 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 for pulverized coal. Both ends of the flue gas inlet pipe 22 extend out of the furnace body 1, and a flexible sealing ring 25 is provided on the flue gas inlet pipe 22. The flexible sealing ring 25 is used to seal the gap between the flue gas inlet pipe 22 and the furnace body 1, so as to ensure that when the flue gas inlet pipe 22 shakes with the heat exchanger 2, the flexible sealing ring 25 can be deformed, 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, and 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 with a flexible connecting pipe 55, so that the flue gas inlet pipe 22 can be conveniently connected to the temperature compensator 5; in other words, when the heat exchanger 2 shakes, the flue gas inlet pipe 22 follows the shaking, and the temperature compensator 5 will not follow the shaking, and at the same time, the connection between the flexible connecting pipe 55 and the temperature compensator 5 can be guaranteed. The temperature compensator 5 is connected to the flue gas supply pipe 53, that is, all temperature compensators 5 are connected to the flue gas supply pipe 53.

[0039] The smoke inlet pipe 22 includes a first inlet pipe body 221 and a first dispersed pipe body 222. The first dispersed pipe body 222 is installed on the first inlet pipe body 221. The first inlet pipe body 221 has a first inlet cavity 2201. The first dispersed pipe body 222 has a first dispersed cavity 2202. The heat exchange pipe 24 is installed on the first dispersed pipe body 222 and communicates with the first dispersed cavity 2202. Through holes are provided on the first inlet pipe body 221 and the first dispersed pipe body 222. The through holes on the first inlet cavity 2201 are aligned with the through holes on the first dispersed cavity 2202, so that the first inlet cavity 2201 and the first dispersed cavity 2202 are communicated, so that smoke can enter the first dispersed 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, which increase 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, so that 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 smoke inlet pipe 22 can also be a larger tube, and two opposing partitions are arranged in the tube to divide the internal space of the tube 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.

[0040] The temperature compensator 5 includes a burner 51 and a heating box 52. The burner 51 is installed on the heating box 52, and the flue gas supply pipe 53 is connected to the heating box 52. The flue gas supply pipe 53 delivers flue gas into the heating box 52, and the burner 51 heats the flue gas in the heating box 52, so that the temperature of the flue gas can meet the design requirements.

[0041] The temperature compensation tube 23 is used to compensate for the temperature of the flue gas therein. Both ends of the temperature compensation tube 23 extend out of the furnace body 1. A flexible sealing ring 25 is provided on the temperature compensation tube 23. The flexible sealing ring 25 is used to seal the gap between the temperature compensation tube 23 and the furnace body 1, so as to ensure that when the temperature compensation tube 23 follows the vibration of the heat exchanger 2, the flexible sealing ring 25 can be deformed to ensure that the temperature compensation tube 23 and the furnace body 1 are always in a sealed state; the temperature compensation tube 23 is connected to a burner 51, and the burner 51 is used to increase the temperature of the flue gas in the temperature compensation tube 23, so as to ensure that the flue gas in 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 55, so that the temperature compensation tube 23 can be easily connected 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 the connection between the flexible connecting tube 55 and the burner 51 can be guaranteed.

[0042] The temperature compensation tube 23 includes a second air intake pipe body 231 and a second dispersed pipe body 232, wherein the second dispersed 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, and the second dispersed pipe body 232 has a second dispersed cavity 2302. The heat exchange tube 24 above the temperature compensation tube 23 is installed on the second dispersed pipe body 232 and is connected to the second dispersed cavity 2302, and 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. The second air inlet pipe body 231 and the second dispersion pipe body 232 are both provided with through holes, and the through holes on the second air inlet cavity 2301 are aligned with the through holes on the second dispersion cavity 2302, so that the second air inlet cavity 2301 and the second dispersion cavity 2302 are connected, so that the smoke in the heat exchange tube 24 below the temperature compensation tube 23 can 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 are air inlets to increase the air intake speed. 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 smoke 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 corresponds to the position of the through hole, so that smoke is first dispersed by the second baffle 233 after entering the second dispersion cavity 2302 and then enters the heat exchange tube 24, and the smoke is evenly distributed as much as possible before entering the heat exchange tube 24 connected to the second dispersion cavity 2302, so as to ensure that the temperature of the heat exchange tube 24 connected to the second dispersion cavity 2302 remains consistent. According to the different heights of the temperature compensation tube 23, the temperature at which the heating device heats the smoke is different to ensure the heat exchange requirements. In other embodiments, the temperature compensation tube 23 can also be a larger tube. Two opposing partitions are 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.

[0043] The flue gas outlet pipe 21 is used to collect flue gas after all heat exchange is 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, and 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, so as to ensure that when the flue gas outlet pipe 21 shakes with the heat exchanger 2, the flexible sealing ring 25 can be deformed, 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 a flue gas collection pipe 54, and the flue gas collection pipe 54 is used to collect flue gas, so as to facilitate the harmless treatment after the flue gas is collected. The flue gas outlet pipe 21 is connected with a flexible connecting pipe 55, so that the flue gas outlet pipe 21 and the flue gas collecting pipe 54 can be conveniently connected; in other words, when the heat exchanger 2 shakes, the flue gas outlet pipe 21 follows the shaking, and the flue gas collecting pipe 54 will not follow the shaking, while the connection between the flexible connecting pipe 55 and the flue gas collecting pipe 54 can be guaranteed.

[0044] like Figures 7 to 10 As shown, the heat exchange tube 24 includes a heat exchange tube body 24 and a plurality of heat exchange parts 242 arranged on the heat exchange tube body 24. The heat exchange tube body 24 has a tube cavity for flue gas flow. The heat exchange part 242 is arranged on the inner wall of the tube cavity, and the heat exchange part 242 protrudes toward the center of the tube cavity to increase the heat exchange area and ensure the efficiency of heat absorption. The upper and lower adjacent heat exchange parts 242 are oppositely distributed in the tube cavity, that is, the heat exchange parts 242 are alternately distributed in the tube cavity one by one. The outer wall of the heat exchange tube 24 body is provided with an outer fin 243, and the outer fin 243 is used to increase the heat exchange area, that is, to increase the contact area between the heat exchange tube body 24 and the pulverized coal. Usually, four outer fins 243 are set, and it is not advisable to set too many outer fins 243, which is easy to cause the pulverized coal to accumulate and eventually agglomerate, so as to prevent the pulverized coal from agglomerating.

[0045] The arc length of the heat exchange part 242 is smaller than the circular circumference of the tube cavity. The arc length of the heat exchange part 242 is usually set to half the circumference of the center of the tube cavity. In this way, while ensuring a certain heat exchange effect, the flue gas can also form turbulence in the tube cavity. Turbulence can prevent the same part of the flue gas from always contacting the heat exchange tube 24, that is, the temperature of the flue gas near the center of the tube cavity will not be higher than the temperature of the flue gas near the inner wall of the tube cavity. The temperature of the flue gas at the same height position is basically the same, and the heat energy of all the flue gas can be utilized. The heat exchange part 242 includes a plurality of inner fins 2421 arranged in a matrix, using a conventional fin structure, without the need to use a new process for processing, which can reduce processing costs.

[0046] The heat exchange tube 24 includes an upper tube body 2411, a staggered tube body 2412 and a lower tube body 2413. A heat exchange part 242 is arranged in the upper tube body 2411 and the lower tube body 2413. The upper tube body 2411 and the lower tube body 2413 are connected by the staggered tube body 2412. The staggered tube body 2412 is arranged obliquely so that the upper tube body 2411 and the lower tube body 2413 are staggered, that is, the upper end of the heat exchange tube 24 is staggered with the lower end of the heat exchange tube 24, thereby realizing the staggered direction of the heat exchange tube 24.

[0047] The heat exchange tubes 24 can be staggered in the vertical direction, and the adjacent rows of heat exchange tubes 24 can be staggered, so that the pulverized coal can be heated evenly, and at the same time, the pulverized coal can be made fluffy and not easy to agglomerate during the falling process. Compared with the simple layout of conventional matrix arrangement without staggering, the staggered layout structure design of the heat exchange tubes 24 in the present application can reduce the use of heat exchange tubes 24 by half while achieving the same heat exchange effect, and can also make the pulverized coal fluffy.

[0048] like Figures 11 to 14 As shown, the gas collecting device 6a includes a first gas collector 61, a gas collecting box 62 and a gas exhaust pipe 63. The first gas collector 61 is installed on the furnace body 1, and the gas collecting box 62 is installed outside the furnace body 1, and both ends of each of the first gas collectors 61 extend out of the furnace body 1 and then extend into the gas collecting box 62. The first gas collector 61 is used to collect the gas in the cooling and gas collecting section of the furnace body 1. There are multiple first gas collectors 61, which are arranged in the horizontal direction, and the adjacent first gas collectors 61 are staggered in the vertical direction, that is, the first gas collectors 61 are arranged in sequence in the horizontal direction, one high and one low, to prevent the pulverized coal from agglomerating; the first gas collectors 61 in the gas collecting devices 6a adjacent to each other are staggered in the horizontal direction to prevent the pulverized coal from agglomerating. The first gas collectors 61 adjacent to each other in the vertical and horizontal directions are staggered, which makes the pulverized coal fluffy and not easy to agglomerate during the falling process, and at the same time makes it easier for the coal gas mixed in the pulverized coal to overflow and be collected by the first gas collector 61. Compared with the simple layout of the conventional matrix arrangement without staggering, the staggered layout structural design of the first gas collector 61 in the present application can achieve the same gas collection effect while reducing the usage of the first gas collector 61. The gas exhaust pipe 63 is installed on the gas collection box 62, and the gas exhaust pipe 63 is used to connect the gas collection boxes 62 at both ends of the first gas collector 61, and send the gas in the gas collection box 62 to the external gas treatment system. The provision of the gas collection box 62 and the gas exhaust pipe 63 can reduce the number of pipelines connected to the external gas treatment system, which is convenient for troubleshooting and maintenance.

[0049] The first gas collector 61 includes a collector-distributor connecting pipe 611, a collector-distributor box 612 and a pulverized coal baffle 613. The collector-distributor connecting pipe 611 is installed on the furnace body 1, the collector-distributor box 612 is installed on the collector-distributor connecting pipe 611, the collector-distributor box 612 is connected with the connecting pipe, and a gas channel is provided on the collector-distributor box 612. The gas channel of the collector-distributor box 612 is used to collect coal gas. After entering the collector-distributor box 612, the coal gas enters the collector-distributor connecting pipe 611 and finally enters the gas collecting box 62 from the collector-distributor connecting pipe 611. The pulverized coal baffle 613 is installed on the collector-distributor box 612, and the pulverized coal baffle 613 is used to block the pulverized coal from entering the gas channel to reduce the possibility of the pulverized coal entering the collector-distributor box 612.

[0050] Specifically, the collecting and distributing box 612 is a rectangular frame, and the collecting and distributing box 612 is provided with a first vent 6121 and a second vent 6122, and the first vent 6121 and the second vent 6122 constitute a gas passage. The first vent 6121 is located on the side wall of the collecting and distributing box 612, and there are multiple first vents 6121. The side wall of each side of the collecting and distributing box 612 is arranged with multiple rows of the first vents 6121, and each row has multiple first vents 6121, so that the points of gas collection can be increased as much as possible, and the strength of the collecting and distributing box 612 can be guaranteed at the same time. The first vent 6121 is usually set to be circular, and of course, in other embodiments, it can also be set to other shapes, as long as the strength of the side wall of the collecting and distributing box 612 can be guaranteed. There are four pulverized coal baffles 613, and two pulverized coal baffles 613 are fixed at an angle on each side of the collecting and distributing box 612; the projection of the pulverized coal baffles 613 on the collecting and distributing box 612 can cover the first air vent 6121, and the pulverized coal baffles 613 are tilted and cover the first air vent 6121 at the same time, so that a gas collecting space is formed between the pulverized coal baffles 613 and the side wall of the collecting and distributing box 612, and the pulverized coal cannot enter the gas collecting space under the guidance of the pulverized coal baffles 613. In this way, the pure pulverized coal content of the coal gas collected by the first air vent 6121 is extremely low, that is, the pulverized coal can be prevented from entering the collecting and distributing box 612, and the blockage of the first air vent 6121 can be avoided. The tilted pulverized coal baffles 613 can also reduce the volume of a single first gas collector 61, so that more first gas collectors 61 can be set at the same height. One pulverized coal baffle 613 can block two rows of first vents 6121. In other embodiments, it can also block one row of first vents 6121, which can be set according to needs. The second vent 6122 is arranged along the length direction of the collecting and distributing box 612. The length of the second vent 6122 is usually consistent with the length of the collecting and distributing box 612, forming a gas collecting surface, so that the gas collecting area can be increased as much as possible. In this embodiment, the opening at the lower end of the rectangular frame is used as the second vent 6122. Of course, in order to ensure the strength of the collecting and distributing box 612, reinforcing ribs can also be set in the collecting and distributing box 612 to increase the strength of the collecting and distributing box 612. In another embodiment, the second vent 6122 can also be divided into multiple sections, and a partition is set between each adjacent section of the second vent 6122, that is, the collecting and distributing box 612 is a box body with an opening at the upper end and a closed lower end, and a second vent 6122 for ventilation is opened at the closed end of the lower end of the box body. The first vent 6121 and the second vent 6122 are distributed in different planes to form three-dimensional gas collecting points, which has a good gas collecting effect.

[0051] The collecting and distributing connecting pipe 611 is a hollow tube body, and both ends of the collecting and distributing connecting pipe 611 are located in the gas gathering box 62. A connecting opening 6111 is provided on the collecting and distributing connecting pipe 611. The upper end of the collecting and distributing box 612 is fixed at the connecting opening 6111 of the collecting and distributing connecting pipe 611, so that the collecting and distributing box 612 is connected to the collecting and distributing connecting pipe 611.

[0052] The cooling device 6b includes a second gas collector 64 and a gas distribution box 65. The second gas collector 64 is installed in the furnace body 1, and the gas distribution box 65 is installed outside the furnace body 1. The two ends of the second gas collector 64 pass through the furnace body 1 and extend into the gas distribution box 65. The second gas collector 64 is used to blow cooling gas into the furnace body 1 to cool the pulverized coal. There are multiple second gas collectors 64. The second gas collectors 64 are arranged in the horizontal direction, and the adjacent second gas collectors 64 are staggered in the vertical direction, that is, the second gas collectors 64 are arranged in sequence in the horizontal direction, one high and one low, to prevent the pulverized coal from agglomerating. The second gas collectors 64 in the upper and lower adjacent cooling devices 6b are staggered in the horizontal direction to prevent the pulverized coal from agglomerating. The second gas collectors 64 adjacent in the vertical and horizontal directions are staggered, so that the pulverized coal is fluffy and not easy to agglomerate during the falling process, and the cooling gas can be mixed into the pulverized coal to improve the cooling effect. Compared with the simple layout of conventional matrix arrangement without dislocation, the dislocation layout structural design of the second gas collector 64 in the present application can achieve the same cooling effect while reducing the usage of the second gas collector 64. The gas distribution box 65 is connected to a gas supply pipe 66, and the external cooling gas is sent into the gas distribution box 65 through the gas supply pipe 66. The gas distribution box 65 then diverts the cooling gas to the second gas collector 64, and the cooling gas is sent into the furnace body 1 through the second gas collector 64 to cool the pulverized coal in the furnace body 1. The gas supply pipe 66 connects the gas distribution boxes 65 of multiple cooling devices 6b, and the external cooling gas is centrally sent in through the gas supply pipe 66, which can reduce the pipelines connected to the external cooling gas source, and is convenient for troubleshooting and maintenance. The cooling gas uses cooled coal gas, which will not increase the coal gas components collected by the gas collecting device 6a, and is convenient for subsequent treatment of the coal gas. The structure of the second gas collector 64 is the same as that of the first gas collector 61 , and reference is made to the structural description of the first gas collector 61 .

[0053] like Figures 15 to 17As shown, the discharge hopper 8 includes a gathering hopper 81, a support hopper 82, a fixing rod 83 and a pulverized coal retaining ring 84. The support hopper 82 is installed in the gathering hopper 81 through the fixing rod 83. The support hopper 82 is used to install the power equipment of the discharger 7, that is, to provide installation space and support points for the power equipment of the discharger 7, to prevent pulverized coal from entering the power equipment, and to improve the service life of the power equipment. There are multiple fixing rods 83, and the fixing rods 83 are evenly distributed around the support hopper 82 to ensure that the connection between the support hopper 82 and the gathering hopper 81 is more stable. In order to further improve the stability of the connection, fixing rods 83 are provided at the upper and lower ends of the support hopper 82 to connect with the gathering hopper 81. The pulverized coal retaining ring 84 is installed on the aggregate hopper 81, and can also be installed on the fixed rod 83, or both can be connected at the same time; the gap between the pulverized coal retaining ring 84 and the inner wall of the aggregate hopper 81 forms a gas collecting interlayer 80, and the gas collecting interlayer 80 is used to collect the coal gas in the aggregate hopper 81. The upper end of the pulverized coal retaining ring 84 abuts against the inner wall of the aggregate hopper 81 to close the upper end of the gas collecting interlayer 80 to reduce the possibility of coal powder entering the gas collecting interlayer 80. The gas collecting pipe 85 is installed on the aggregate hopper 81 and communicated with the gas collecting interlayer 80. The coal gas collected by the gas collecting interlayer 80 is sent to the external coal gas treatment system through the gas collecting pipe 85. The aggregate hopper 81 is provided with an inspection port 811, which is convenient for the inspection of the parts in the aggregate hopper 81. The gas collecting interlayer 80 is provided in the discharge hopper 8, which can collect the coal gas at the discharge end of the furnace body 1 and reduce the possibility of coal gas overflow.

[0054] After entering the furnace body 1, the pulverized coal enters the carbonization area. The pulverized coal first passes through the upper heat exchange tube 24 for preliminary heating, then enters the middle heat exchange tube 24 for secondary heating, and finally enters the lower heat exchange tube 24 for final heating. When shaking is required, the shaking driver 31 drives the connecting rod 32 to move up and down, the connecting rod 32 drives the traction member 33 to move up and down, and the traction member 33 drives the heat exchanger 2 to move up and down to achieve shaking of the heat exchanger 2. After heating, the pulverized coal enters the cooling and gas collection section. During the falling process of the pulverized coal, the coal gas precipitates from the pulverized coal and enters the collecting and distributing connecting pipe 611 through the first air vent 6121 and the second air vent 6122, and then the coal gas enters the first gas collection box 62 and then enters the coal gas exhaust pipe 63, and is finally sent to the external coal gas treatment system to complete the collection of coal gas. While collecting the coal gas, the external gas source delivers the cooling gas to the gas distribution box 65 through the gas delivery pipe 66, and the gas distribution box 65 in turn distributes the cooling gas to the second gas collector 64, and the cooling gas is delivered to the furnace body 1 through the second gas collector 64 to cool the pulverized coal in the furnace body 1. After cooling and gas collection are completed, the pulverized coal is discharged into the discharge hopper 8 through the discharger 7, and the discharge hopper 8 discharges the pulverized coal and collects a small amount of coal gas mixed in the pulverized coal at the same time, reducing the possibility of coal gas discharge.

[0055] The heat exchange tube 24 retains the heat exchange part 242 to ensure the heat exchange effect. At the same time, the upper and lower adjacent heat exchange parts 242 are arranged oppositely, which can reduce the processing amount, reduce the processing cost and thus reduce the procurement cost. The oppositely arranged heat exchange parts 242 can also make the flue gas turbulent and flow in an S shape in the tube cavity, ensuring that the flue gas can evenly heat the heat exchange tube 24 and maximize the use of the heat energy of the flue gas. The heat exchanger is provided with a shaking function to prevent the pulverized coal from agglomerating during heat exchange; at the same time, the heat exchange tube 24, the first gas collector 61 and the second gas collector 64 are staggered in the vertical direction and the horizontal direction, which can make the pulverized coal fluffy and not easy to agglomerate during the falling process, and at the same time, the pulverized coal is evenly heated when heated and cooled when cooled, and the coal gas can be collected to the greatest extent when collecting gas; in this way, the quality of the pulverized coal after low-temperature carbonization is guaranteed. Compared with the conventional matrix arrangement without staggered simple layout, the staggered layout design of the heat exchange tube 24, the first gas collector 61 and the second gas collector 64 in the present application can achieve the same effect while reducing the usage of the heat exchange tube 24, the first gas collector 61 and the second gas collector 64. In this way, the pulverized coal produced by dry distillation does not contain coal gas, and the pulverized coal will not agglomerate, thereby ensuring the quality of the pulverized coal after dry distillation.

[0056] The above are only implementation modes of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure made using the contents of the present invention's specification and drawings, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present invention.

Claims

1. A low temperature upgrading furnace, characterized in that: It includes a furnace body, a heat exchanger for heating pulverized coal in the furnace body, a shaking device for driving the heat exchanger to shake, a gas collecting device for collecting coal gas in the heated pulverized coal, and a cooling device for cooling the heated pulverized coal, the shaking device is connected to the heat exchanger, and the gas collecting device and the cooling device are located below the heat exchanger; the gas collecting device includes a first gas distributor for collecting coal gas, the first gas distributors are arranged in the horizontal direction, and the adjacent first gas distributors are staggered in the vertical direction, and the first gas distributors in the upper and lower adjacent gas collecting devices are staggered in the horizontal direction; the cooling device includes a second gas distributor for releasing cooling gas, the second gas distributors are arranged in the horizontal direction, and the adjacent second gas distributors are staggered in the vertical direction, and the second gas distributors in the upper and lower adjacent cooling devices are staggered in the horizontal direction.

2. The low temperature upgrading furnace according to claim 1, characterized in that: The gas collecting device also includes a gas collecting box and a gas exhaust pipe. The gas collecting box is installed outside the furnace body, and both ends of each of the first gas collectors and distributors pass through the furnace body and extend into the gas collecting box. The gas exhaust pipe is installed on the gas collecting box to connect the gas collecting boxes at both ends of the first gas collectors and distributors.

3. The low temperature upgrading furnace according to claim 1, characterized in that: The cooling device also includes a gas distribution box. The second gas collector is installed in the furnace body, and the gas distribution box is installed outside the furnace body. Both ends of the second gas collector pass through the furnace body and extend into the gas distribution box. The gas distribution box is connected to a gas supply pipe, and the external cooling gas is supplied to the gas distribution box through the gas supply pipe.

4. The low temperature upgrading furnace according to claim 1, 2 or 3, characterized in that: The first gas collector and the second gas collector both include a collector-distributor connecting pipe, a collector-distributor box and a pulverized coal baffle. The collector-distributor connecting pipe is installed on the furnace body, the collector-distributor box is installed on the collector-distributor connecting pipe, the collector-distributor box is communicated with the connecting pipe, a gas channel is provided on the collector-distributor box, the gas channel of the collector-distributor box is used to collect coal gas, the pulverized coal baffle is installed on the collector-distributor box, and the pulverized coal baffle is tilted on the collector-distributor box.

5. The low temperature upgrading furnace according to claim 4, characterized in that: The collecting and distributing box is provided with a first vent and a second vent, the first vent and the second vent constitute a gas passage, the first vent is located on the side wall of the collecting and distributing box, and the second vent is located at the bottom of the collecting and distributing box.

6. The low temperature upgrading furnace according to claim 5, characterized in that: There are a plurality of the first vents, and a plurality of rows of the first vents are arranged on the side wall of each side of the collecting and distributing box.

7. The low temperature upgrading furnace according to claim 1, characterized in that: It also includes a discharger for discharging the cooled pulverized coal and a discharge hopper for receiving the pulverized coal discharged by the discharger. The discharger is installed on the furnace body. The discharge hopper has a gas collecting interlayer for collecting the coal gas in the hopper.

8. The low temperature upgrading furnace according to claim 7, characterized in that: The discharge hopper includes a gathering hopper, a supporting hopper, a fixed rod and a pulverized coal retaining ring. The supporting hopper is installed in the gathering hopper through the fixed rod. The pulverized coal retaining ring is installed on the gathering hopper or the fixed rod. The gap between the pulverized coal retaining ring and the inner wall of the gathering hopper forms a gas collecting interlayer. The upper end of the pulverized coal retaining ring abuts against the inner wall of the gathering hopper. The upper end of the pulverized coal retaining ring abuts against the inner wall of the gathering hopper to close the upper end of the gas collecting interlayer.

9. The low temperature upgrading furnace according to claim 8, characterized in that: The aggregate hopper is provided with an inspection port.

10. The low temperature upgrading furnace according to claim 1, characterized in that: 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, and the shaking driver is used to drive the connecting rod to move reciprocally up and down. The connecting rod is used to pull the heat exchanger to shake through the traction member.

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