Coal powder back burning device for hot blast stove

Abstract

The utility model provides hot -blast furnace coal powder back burning device belongs to hot -blast furnace equipment technical field, including the fuel pipe that combustion furnace body rear end intercommunication arrangement, fuel pipe feed end top is provided with the feed pipe, the fan that fuel pipe air inlet end sets, be provided with the combustion inner tube in the combustion furnace body, combustion inner tube feed end is provided with transmission mechanism and combustion furnace body rotation connection, combustion inner tube front part is provided with a plurality of leakage holes, the inner bottom of combustion furnace body is provided with the sliding material slope, the central setting of sliding material slope's blanking end is provided with the collection groove, the collection groove discharge end is provided with the back material pipeline, the utility model discloses through motor drive transmission mechanism makes combustion inner tube rotate in the combustion furnace body, makes the coal powder that stays in combustion inner tube to move to the front end of combustor, and coal powder falls to the sliding material slope through leakage hole, and then slides into the collection groove, and then supplies this coal powder into the feed pipe through the coal powder pump, thereby realizes the recycling of unburned coal powder, saves fuel resources, also can reduce the pollution degree of coal powder to rear -end equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of hot blast stove equipment, specifically to a hot blast stove pulverized coal reburning device. Background Technology

[0002] In industrial production, hot air furnaces, as core thermal energy equipment, are widely used in raw material drying, process heating, and other scenarios.

[0003] In related technologies, pulverized coal burners are the core components for achieving stable combustion of pulverized coal in industrial hot air furnaces, boilers, and other equipment. Their structural design is based on the core objective of "pulverized coal-air mixing + stable flame combustion". They mainly consist of five modules: pulverized coal supply system, air distribution system, ignition system, combustion head, and auxiliary support structure. The pulverized coal supply system, in conjunction with the air distribution system, delivers pulverized coal into the interior of the combustion furnace. The ignition system then ignites the pulverized coal, causing it to burn. Simultaneously, the air distribution system blows the heat generated into the downstream processes.

[0004] However, existing pulverized coal stays in the combustion furnace of the pulverized coal burner for too long. Although this can improve the combustion efficiency of pulverized coal and reduce the generation of black smoke to protect the atmospheric environment, some pulverized coal particles will drift to the downstream process with the blower. This will cause unburned pulverized coal particles to adhere to the inside of the downstream equipment. Over time, this accumulation will also lead to the waste of pulverized coal fuel. To solve the above problems, a pulverized coal reburning device for hot blast stoves is proposed. Utility Model Content

[0005] In view of this, the present invention provides a hot blast stove pulverized coal reburning device. The present invention uses a motor to drive the transmission mechanism to rotate, thereby causing the combustion inner cylinder to rotate in the combustion furnace. This allows the pulverized coal remaining in the combustion inner cylinder to move towards the front end of the burner. The unburned pulverized coal falls through the leakage hole to the sliding slope, and then slides into the collection trough. The pulverized coal is then pumped from the circulation pipeline into the feed pipe by the pulverized coal pump, thereby realizing the recycling of unburned pulverized coal, saving fuel resources, and reducing the degree of pollution of downstream equipment by pulverized coal.

[0006] To solve the above-mentioned technical problems, this utility model provides a hot blast stove pulverized coal reburning device, including a combustion furnace body set at the front end of a support frame, a fuel pipe connected to the rear end of the combustion furnace body, a feed pipe set at the top of the feed end of the fuel pipe, a blower set at the air inlet end of the fuel pipe, a combustion inner cylinder set inside the combustion furnace body, a transmission mechanism set at the feed end of the combustion inner cylinder and rotatably connected to the combustion furnace body, a number of material leakage holes set at the front of the combustion inner cylinder, a material sliding slope set at the bottom of the combustion furnace body, a material collection trough set in the center at the discharge end of the material sliding slope, a return pipe set at the discharge end of the material collection trough, a pulverized coal pump set on the return pipe, and the discharge end of the return pipe connected to the discharge end of the feed pipe.

[0007] The transmission mechanism includes a driven gear that is rotatably connected to the back of the combustion furnace body. The driven gear is used to follow the rotation of the driving gear, thereby driving the inner combustion cylinder to rotate. The bottom of the driven gear is meshed with the driving gear. A motor is installed on the side of the driving gear away from the combustion furnace body. The motor is used to drive the driving gear to rotate. The motor is mounted on the support frame via a frame.

[0008] A rotating ring is provided at the front end of the combustion inner cylinder. The rotating ring is used to stabilize the rotation of the front end of the combustion inner cylinder, so that the front end of the combustion inner cylinder can be supported and prevent the combustion inner cylinder from shaking when rotating. A circular slide rail is provided on the surface of the rotating ring. The center of the circular slide rail is a circular jacket, and the external shape is adapted to the inner wall of the combustion furnace body.

[0009] The material leakage hole occupies two-thirds of the front end of the combustion inner cylinder. The fuel pipe is connected to the combustion inner cylinder. A sealing joint is provided on the outer wall of the fuel pipe outlet end to prevent heat loss from the combustion furnace.

[0010] The height of the material collection trough is lower than the bottom of the combustion furnace body.

[0011] The return pipeline includes a circulation pipe connected to the collection trough. The circulation pipe is used to supply the unburned coal powder collected in the collection trough to the discharge end of the feed pipe, so that the coal powder is blown back into the combustion chamber for secondary combustion by the blower. A coal powder pump is connected to the circulation pipe to supply coal powder into the feed pipe. A first valve is installed between the coal powder pump and the collection trough to control the discharge of the collection trough. A second valve is installed between the coal powder pump and the discharge end of the feed pipe to prevent the original coal powder in the feed pipe from rushing into the coal powder pump and the collection trough.

[0012] The fuel pipe feed end is connected to the feed pipe discharge end via a tee fitting, and the other end of the tee fitting is connected to the blower outlet end.

[0013] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects: 1. The transmission mechanism is driven by a motor to rotate, which causes the inner combustion cylinder to rotate within the combustion furnace. This allows the pulverized coal remaining in the inner combustion cylinder to move towards the front end of the burner. Unburned pulverized coal falls through the leakage hole to the sliding slope and then slides into the collection trough. The pulverized coal is then pumped from the circulation pipeline into the feed pipe by the pulverized coal pump, thus realizing the recycling of unburned pulverized coal, saving fuel resources, and reducing the degree of pollution of downstream equipment by pulverized coal.

[0014] 2. The first valve is used to control the discharge of the pulverized coal trough. A second valve is installed between the pulverized coal pump and the discharge end of the feed pipe. The second valve is sealed to the circulation pipeline. The second valve is used to prevent the raw pulverized coal in the feed pipe from being flushed into the pulverized coal pump and the pulverized coal trough.

[0015] 3. The rotating ring is polished. The rotating ring is used to stabilize the rotation of the front end of the combustion inner cylinder, so that the front end of the combustion inner cylinder can be supported and prevent the combustion inner cylinder from shaking when rotating. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side sectional view of the present invention; Figure 3 This utility model Figure 2 A magnified view of part A; Figure 4 This utility model Figure 2 A magnified view of part B; Figure 5 This is a side sectional view of the present invention; Figure 6 This is a rear sectional view of the present invention.

[0017] Explanation of reference numerals in the attached drawings: 100, support frame; 101, combustion furnace body; 102, fuel pipe; 103, feed pipe; 104, blower; 105, combustion inner cylinder; 106, sealing joint; 200, transmission mechanism; 201, driven gear; 202, driving gear; 203, motor; 204, frame; 300, material leakage hole; 301, material sliding slope; 302, material collection trough; 303, rotating ring; 304, circular slide rail; 400, return pipe; 401, pulverized coal pump; 402, circulation pipe; 403, first valve; 404, second valve; 500, tee fitting. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-6 The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0019] like Figure 1-6As shown: This embodiment provides a hot blast stove pulverized coal reburning device, including a combustion furnace body 101 mounted on the front end of a support frame 100, a fuel pipe 102 connected to the rear end of the combustion furnace body 101, a feed pipe 103 mounted at the top of the feed end of the fuel pipe 102, a feed pump mounted at the feed end of the feed pipe 103, a valve mounted on the feed pipe 103 at the front of the feed pump, a blower 104 mounted at the air inlet of the fuel pipe 102, and a combustion inner cylinder 105 mounted inside the combustion furnace body 101. The inner cylinder 105 is equipped with a transmission mechanism 200 at the feed end, which is rotatably connected to the combustion furnace body 101. The front of the inner cylinder 105 is provided with several material leakage holes 300. The bottom of the combustion furnace body 101 is provided with a material sliding slope 301. The material collection trough 302 is provided in the middle of the material discharge end of the material sliding slope 301. The discharge end of the material collection trough 302 is provided with a return pipe 400. A pulverized coal pump 401 is provided on the return pipe 400. The discharge end of the return pipe 400 is connected to the discharge end of the feed pipe 103.

[0020] During use, the motor 203 drives the transmission mechanism 200 to rotate, thereby causing the combustion inner cylinder 105 to rotate inside the combustion furnace body 101. This allows the pulverized coal remaining in the combustion inner cylinder 105 to move towards the front end of the burner. Unburned pulverized coal falls through the leakage hole 300 to the sliding slope 301, and then slides into the collection trough 302. The pulverized coal is then pumped by the pulverized coal pump 401 from the circulation pipeline into the feed pipe 103, thereby realizing the recycling of unburned pulverized coal, saving fuel resources, and reducing the degree of pollution of downstream equipment by pulverized coal.

[0021] This embodiment provides a hot blast stove pulverized coal reburning device. like Figure 1 , 2 As shown in Figure 3, the transmission mechanism 200 includes a driven gear 201 rotatably connected to the back of the combustion furnace body. The driven gear 201 is rotatably connected to the combustion inner cylinder 105 via a turntable. The driven gear 201 is used to follow the rotation of the drive gear 202, thereby driving the combustion inner cylinder 105 to rotate. The drive gear 202 is meshed with the bottom of the driven gear 201. A motor 203 is provided on the side of the drive gear 202 away from the combustion furnace body. The motor 203 is fixed to the frame 204 by bolts. The motor 203 is used to drive the rotation of the drive gear 202. A bearing seat is provided on the opposite side of the drive gear 202 and the motor 203. The frame 204 can be a damping and shock-absorbing model. The motor 203 is mounted on the support frame 100 through the frame 204.

[0022] like Figure 2 , 4As shown in Figure 5: A rotating ring 303 is provided at the front end of the combustion inner cylinder 105. The rotating ring 303 is welded to the combustion inner cylinder 105. The surface of the rotating ring is polished. The rotating ring 303 is used to stabilize the rotation of the front end of the combustion inner cylinder 105, so that the front end of the combustion inner cylinder 105 can be supported and prevent the combustion inner cylinder 105 from shaking when rotating. A circular slide rail 304 is provided on the surface of the rotating ring 303. The circular slide rail 304 is slidably adapted to the rotating ring 303. The central part of the circular slide rail 304 is a circular jacket, and the external shape is adapted to the inner wall of the combustion furnace body 101.

[0023] Its effect is as follows: the rotating ring surface is polished, and the rotating ring 303 is used to stabilize the rotation of the front end of the combustion inner cylinder 105, so that the front end of the combustion inner cylinder 105 can be supported and prevent the combustion inner cylinder 105 from shaking when rotating.

[0024] like Figure 2 , 4 As shown in Figures 5 and 6: The material leakage hole 300 occupies two-thirds of the front end of the combustion inner cylinder 105. The material leakage hole 300 is elongated. A fuel pipe for easy material sliding is provided along the edge of the material leakage hole 300 and is connected to the combustion inner cylinder 105. A sealing joint 106 is provided on the outer wall of the discharge end of the fuel pipe. The sealing joint 106 is used to prevent heat loss in the combustion furnace body 101. The sealing joint 106 can be a packing head for combustion furnaces. The height of the material collection trough 302 is lower than the bottom of the combustion furnace body 101.

[0025] like Figure 1 , 2 As shown in Figure 4: The return pipeline 400 includes a circulation pipeline 402 connected to the collection trough 302. The circulation pipeline 402 is welded to the collection trough 302. The circulation pipeline 402 is used to supply the unburned coal powder collected in the collection trough 302 to the outlet end of the feed pipe 103. A level gauge is installed on the collection trough 302, so that the coal powder is blown back into the combustion chamber 105 for secondary combustion by the blower 104. A coal powder pump 401 is connected to the circulation pipeline 402. The coal powder pump 401 is used for... Powdered coal is fed into the feed pipe 103. A first valve 403 is provided between the powdered coal pump 401 and the collection trough 302. The first valve 403 is sealed and connected to the circulation pipe 402. The first valve 403 is used to control the discharge of the collection trough 302. A second valve 404 is provided between the powdered coal pump 401 and the discharge end of the feed pipe 103. The second valve 404 is sealed and connected to the circulation pipe 402. The second valve 404 is used to prevent the original powdered coal in the feed pipe 103 from rushing into the powdered coal pump 401 and the collection trough 302.

[0026] Its effect is as follows: the circulation pipe 402 is used to supply the unburned coal powder collected in the collection trough 302 to the discharge end of the feed pipe 103, so that the coal powder is blown into the combustion inner cylinder 105 for secondary combustion by the blower 104. The first valve 403 is used to control the discharge of the collection trough 302. A second valve 404 is provided between the coal powder pump 401 and the discharge end of the feed pipe 103. The second valve 404 is sealed to the circulation pipe 402. The second valve 404 is used to prevent the original coal powder in the feed pipe 103 from rushing into the coal powder pump 401 and the collection trough 302.

[0027] like Figure 1 , 2 As shown: The feed end of the fuel pipe 102 is connected to the discharge end of the feed pipe 103 through a tee fitting 500. The tee fitting 500 is welded to the fuel pipe 102. The tee fitting 500 is welded to the air duct at the air outlet of the blower 104. The other interface of the tee fitting 500 is connected to the air outlet of the blower 104. The tee fitting 500 can be replaced with a Y-shaped or cross-shaped connecting pipe according to the actual installation situation.

[0028] Working principle: Pulverized coal is supplied to the fuel pipe through the feed pipe 103 and the three-way fitting 500. Simultaneously, the blower 104 blows the pulverized coal into the combustion furnace body 101 through the three-way fitting 500, thus allowing the pulverized coal to enter the combustion inner cylinder 105. The motor 203 drives the drive gear 202 to rotate, which in turn drives the driven gear 201 to rotate. This causes the combustion inner cylinder 105, which is connected to the driven gear 201, to rotate, allowing the pulverized coal that has been staying in the combustion inner cylinder 105 for a long time to move towards the front end of the burner. The unburned coal powder is allowed to fall through the leakage hole 300 to the sliding slope 301, and then slides down the slope of the sliding slope 301 into the collection trough 302. The coal powder pump 401 then pumps the collected unburned coal powder from the circulation pipeline into the feed pipe 103 (at this time, the valve on the feed pipe 103 is closed; when using raw coal powder, the valve on the circulation pipeline needs to be closed). This realizes the recycling of unburned coal powder, thereby saving fuel resources and reducing the pollution of downstream equipment by coal powder.

[0029] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A hot blast stove pulverized coal reburning device, comprising a combustion furnace body (101) mounted on a support frame (100) at its front end, a fuel pipe (102) connected to the rear end of the combustion furnace body (101), a feed pipe (103) mounted at the top of the feed end of the fuel pipe (102), and a blower (104) mounted at the air inlet end of the fuel pipe (102), characterized in that: The combustion furnace body (101) is provided with a combustion inner cylinder (105). The feed end of the combustion inner cylinder (105) is provided with a transmission mechanism (200) which is rotatably connected to the combustion furnace body (101). The front part of the combustion inner cylinder (105) is provided with several material leakage holes (300). The bottom of the combustion furnace body (101) is provided with a material sliding slope (301). The material discharge end of the material sliding slope (301) is provided with a material collection trough (302) in the middle. The discharge end of the material collection trough (302) is provided with a return pipe (400). A pulverized coal pump (401) is provided on the return pipe (400). The discharge end of the return pipe (400) is connected to the discharge end of the feed pipe (103).

2. The hot blast stove pulverized coal re-firing device as described in claim 1, characterized in that: The transmission mechanism (200) includes a driven gear (201) rotatably connected to the back of the combustion furnace body. The driven gear (201) is meshed with a driving gear (202) at its bottom. A motor (203) is provided on the side of the driving gear (202) away from the fuel furnace body. The motor (203) is mounted on the support frame (100) via a frame (204).

3. The hot blast stove pulverized coal re-firing device as described in claim 2, characterized in that: The combustion inner cylinder (105) is provided with a rotating ring (303) at the front end, and a circular slide rail (304) is provided on the surface of the rotating ring (303). The circular slide rail (304) has a circular sleeve in the middle, and the shape of the outer part of the circular slide rail (304) is adapted to the inner wall of the combustion furnace body (101).

4. The hot blast stove pulverized coal re-firing device as described in claim 3, characterized in that: The discharge hole (300) occupies two-thirds of the front end of the combustion inner cylinder (105), the fuel pipe is connected to the combustion inner cylinder (105), and a sealing joint (106) is provided on the outer wall of the discharge end of the fuel pipe.

5. The hot blast stove pulverized coal re-firing device as described in claim 4, characterized in that: The height of the material collection trough (302) is lower than the bottom of the combustion furnace body (101).

6. The hot blast stove pulverized coal re-firing device as described in claim 5, characterized in that: The return pipeline (400) includes a circulation pipeline (402) connected to the collection trough (302). The pulverized coal pump (401) is connected to the circulation pipeline (402). A first valve (403) is provided between the pulverized coal pump (401) and the collection trough (302). A second valve (404) is provided between the pulverized coal pump (401) and the discharge end of the feed pipe (103).

7. The hot blast stove pulverized coal re-firing device as described in claim 6, characterized in that: The feed end of the fuel pipe (102) is connected to the discharge end of the feed pipe (103) through a three-way fitting (500), and the other interface of the three-way fitting (500) is connected to the air outlet end of the blower (104).

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