A method for increasing the ratio of bituminous coal injection

Abstract

The present invention discloses a method for improving the injection ratio of bituminous coal, S1, preliminary crushing: steam will drive the transmission disk to rotate, so as to drive the rotating plate to rise and fall and rotate, so as to continuously press the crushed blocks toward the coal blocks, so as to quickly crush the coal blocks added to the bottom from the feed crushing chamber; S2, preheating: high-temperature gas is transported to the position of the heat dissipation pipe, so that heat can be transported to the uncrushed coal blocks, and then preliminary drying is performed; the present invention continues to crush through the crushing disk and the fixed crushing ring, and the screening drum is driven by the screening motor to rotate at high speed. At this time, the centrifugal force will throw out the coal powder that has been crushed to meet the standards, and the coal powder that has met the standards is collected at the position of the discharge pipe, so that the coal powder with suitable diameter can be quickly and effectively separated, thereby improving the combustion efficiency, thereby improving the coal injection efficiency of the blast furnace, and effectively increasing the steelmaking efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of coal injection for steelmaking, in particular to a method for increasing the ratio of bituminous coal injection. Background Art

[0002] Over the past half century since blast furnace pulverized coal injection (BFI) products have been widely used in industry, the market demand has gradually expanded with the increasing domestic steel production capacity and the continuous advancement and improvement of key technologies for BFI. In particular, with the increasing scarcity of high-quality coking coal resources in China in recent years, BFI coal has become increasingly important in the steelmaking process and is playing an increasingly important role in saving smelting costs in the steel industry. By replacing coke with bituminous coal injection, steelmaking efficiency is improved.

[0003] However, the existing non-injection technology makes it difficult to effectively and quickly separate coal powder that meets the diameter standard during coal powder manufacturing, resulting in some coal powder with too large a drop being mixed into the injection material, thereby reducing the coal powder injection ratio, and further reducing steelmaking efficiency, reducing production capacity and causing economic losses. In order to avoid the above technical problems, it is indeed necessary to provide a method that can increase the bituminous coal injection ratio to overcome the above-mentioned defects in the existing technology. Summary of the Invention

[0004] The present invention provides a method for increasing the bituminous coal injection ratio, which can effectively solve the problem that the existing non-injection technology proposed in the above background technology is difficult to effectively and quickly separate the coal powder with the standard diameter during coal powder manufacturing, resulting in some coal powder with too large a drop being mixed into the injection material, thereby reducing the coal powder injection ratio, and further reducing steelmaking efficiency, reducing production capacity and causing economic losses.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a method for increasing the injection ratio of bituminous coal,

[0006] S1. Preliminary crushing: Steam drives the transmission disc to rotate, which drives the rotating plate to rise and fall, so as to continuously press the crushed pieces toward the coal blocks, so as to quickly crush the coal blocks added to the bottom of the feed crushing chamber;

[0007] S2. Preheating: High-temperature gas is delivered to the heat pipe, so that heat can be delivered to the uncrushed coal blocks, thereby performing preliminary drying and further improving the coal injection combustion efficiency;

[0008] S3, fine crushing: The coal is poured into the middle of the multiple crushing discs through the feed pipe. At this time, multiple active rollers and crushing discs will crush the coal blocks, and the crushing discs at different positions will crush the coal blocks more finely.

[0009] S4. Rapid screening: The screening drum is driven by the screening motor to rotate at high speed, thereby generating centrifugal force. At this time, the centrifugal force will throw the coal powder that has been crushed to the standard out through the screening holes and into the inner side of the outer coal powder pipe;

[0010] S5. Cooling and collection: Cool the high-temperature gas, and finally transport the high-temperature gas to the inside of the evaporation water tank to boil water, so that the steam can be used to facilitate people's storage, transportation and refining of gas resources, and further improve the comprehensive utilization efficiency of resources.

[0011] Preferably, a crushing and screening assembly is installed on the inner side of the pulverized coal pipe;

[0012] The crushing and screening assembly includes a supporting slot frame, a rotating bearing, a supporting rotating rod, a screening drum, screening holes, a connecting gear, a planetary gear plate, a driving roller, a crushing disk, a fixed crushing ring, a power cylinder, a material receiving chamber, an inner driven gear, a top planetary disk, an outer driven gear, a movable gear ring, a motor bracket, a screening motor, a motor cylinder, a driving gear, a crushing tooth, a second crushing roller and a discharge pipe;

[0013] The bottom of the inner side of the pulverized coal pipe is equipped with a support slot frame, the inner side of the support slot frame is embedded with a rotating bearing, the inner side of the rotating bearing is equipped with a support rotating rod, the top of the supporting rotating rod is equipped with a screening drum, the outer side of the screening drum is provided with screening holes, a connecting gear is installed at the bottom position of the inner side of the screening drum, the outer side of the connecting gear is meshed with a planetary gear disk, the top of the planetary gear disk is equipped with an active roller, the outer side of the active roller is connected to a crushing disk, the inner side of the screening drum is equipped with a fixed crushing ring, the top of the screening drum is equipped with a power cylinder, the inner side of the pulverized coal pipe A material receiving chamber is opened, an inner driven tooth is provided at the inner bottom position of the power cylinder, the inner side of the power cylinder is meshed with a top planetary disk, an outer driven tooth is provided at the outer top position of the power cylinder, the inner side of the inner driven tooth is meshed with a movable gear ring, a motor bracket is installed on the outer side of the pulverized coal pipe, a screening motor is installed at one end of the motor bracket, a motor cylinder is sleeved on the outer side of the screening motor, a driving gear is installed on the transmission end of the screening motor, the outer side of the crushing disk is connected with crushing teeth, a second crushing roller is installed at the bottom end of the top planetary disk, and a discharge pipe is installed at the bottom end of the pulverized coal pipe.

[0014] Preferably, a plurality of planetary gear discs are provided, and the plurality of planetary gear discs are meshed at equal angles at outer positions of the connecting gear.

[0015] Preferably, the driving gear is meshed with the external driven gear, and the input end of the screening motor is electrically connected to the output end of the external power supply.

[0016] Preferably, a temperature control component is provided at the bottom of the pulverized coal pipe;

[0017] The temperature control assembly includes an air inlet pipe, a main pipe, an air distribution pipe, a high-temperature evaporation pipe, a connecting air supply pipe, a heat dissipation pipe, an evaporation heating pipe, an air collecting pipe, a cooling air pipe, a gas control valve, a temperature-controlled evaporation box, a fan chamber, an evaporation water tank, a water inlet pipe, a top cover, a steam pipe, a steam turbine, a steam inlet pipe, a rotating turbine, a clamping groove, an exhaust pipe and a transmission plate;

[0018] The bottom end of the pulverized coal pipe is provided with an air inlet pipe, one end of the air inlet pipe is connected to the main pipe, the air outlet end of the main pipe is connected to a gas distribution pipe, the air outlet end of the gas distribution pipe is connected to a high-temperature evaporation pipe, one end of the high-temperature evaporation pipe is connected to a connecting gas pipe, the air outlet end of the connecting gas pipe is connected to a heat dissipation pipe, the air outlet end of the heat dissipation pipe is connected to an evaporation heating pipe, the air outlet end of the evaporation heating pipe is connected to an air collecting pipe, the air outlet end of the air collecting pipe is connected to a cooling air pipe, a gas control valve is installed on the outside of the cooling air pipe, a temperature-controlled evaporation box is provided on the outside of the evaporation heating pipe, and the interior of the temperature-controlled evaporation box A fan cavity is provided on the side, a fan cavity is provided on the inner side of the temperature-controlled evaporator box, an evaporative water tank is provided on one side of the fan cavity, the top water inlet end of the evaporative water tank is connected to the water inlet pipe, a top cover is installed on the top of the evaporative water tank, the air outlet end of the top cover is connected to the steam pipe, a steam turbine is provided on the top of the top cover, the air inlet end of the steam turbine is connected to the steam inlet pipe, a rotating turbine is installed on the inside of the steam turbine, a clamping groove is provided at the top of the top cover and the corresponding position of the evaporative heating tube, the outer side of the rotating turbine is connected to the exhaust pipe, and the transmission end of the rotating turbine is connected to the transmission disk.

[0019] Preferably, a plurality of high-temperature evaporation tubes are provided, and the plurality of high-temperature evaporation tubes are installed at equal distances on the inner side of the discharge pipe.

[0020] Preferably, the water inlet pipe is connected to an external water source, and the input end of the gas control valve is electrically connected to the output end of an external power supply.

[0021] Preferably, a feed assembly is installed on the top of the pulverized coal pipe;

[0022] The feeding assembly includes a feeding box, a feeding chute, a feeding pipe, a partition plate, an inclined feeding partition plate, a positioning shaft, a rotating plate, a crushing block, a feeding crushing chamber and a guide chute;

[0023] A feed box is provided on the top of the pulverized coal pipe, and a discharge chute is provided at the bottom end of the feed box. A discharge pipe is connected to the bottom end of the feed box at a position corresponding to the discharge chute. A partition plate is installed on the inner side of the feed box, and an inclined feed partition is installed on the top of the partition plate. A positioning shaft is installed on one end face of the transmission disc, and a rotating plate is rotatably sleeved on the outer side of the positioning shaft. A crushing block is welded to the bottom end of the rotating plate. A feed crushing chamber is formed between the inclined feed partition and the feed box, and a material guide chute is formed between the bottom end of the partition plate and the feed box.

[0024] Preferably, a rotation hole is provided on the inner side of the rotating plate at a position corresponding to the positioning shaft, and the rotating plate is rotatably connected to the positioning shaft through the rotation hole.

[0025] Preferably, a funnel is installed at the bottom end of the feed box and at a position corresponding to the discharge pipe, and the discharge pipe and the feed box are connected through the funnel.

[0026] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a scientific and reasonable structure and is safe and convenient to use:

[0027] 1. A crushing and screening component is provided, which continues to crush through the crushing disk and the fixed crushing ring. The screening drum is driven by the screening motor to rotate at high speed, thereby generating centrifugal force. At this time, the centrifugal force will crush the coal powder that meets the standards and throw it out through the screening holes. These coal powders that meet the standards are collected at the discharge pipe position. Through the high-speed rotation of the screening drum, the coal blocks are finely crushed in batches, and then crushed by multiple crushing disks. The crushed coal blocks are screened by centrifugal force, and then the coal powder with suitable diameter can be quickly and effectively separated, thereby improving the combustion efficiency, so as to improve the coal injection efficiency of the blast furnace and effectively increase the steelmaking efficiency.

[0028] 2. It is equipped with a temperature control component, which can quickly and effectively dry the pulverized coal at high temperature by comprehensively recycling the high-temperature gas generated by the blast furnace, thereby improving the combustion efficiency of the coal powder and initially cooling the high-temperature coal gas.

[0029] The heat is transferred to the uncrushed coal blocks for preliminary drying, further improving the coal injection efficiency and cooling the high-temperature gas for a second time. Finally, the high-temperature gas can be transferred to the inside of the evaporation water tank to boil water, so that the steam can be utilized to improve the comprehensive utilization efficiency of the excess heat in the blast furnace. At this time, the temperature of the high-temperature gas is completely dissipated, making it easier for people to store, transport and refine the coal gas resources, further improving the comprehensive utilization efficiency of resources.

[0030] 3. A feeding assembly is provided. The steam will drive the transmission disc to rotate, thereby driving the positioning shaft to rotate, and driving the rotating plate to rise and fall, so as to continuously press the crushed blocks toward the coal blocks, so as to quickly crush the coal blocks added to the bottom of the feeding crushing chamber. At this time, some coal blocks that meet the standards will slide from the guide chute to the discharge chute position, and then the coal blocks will be added to the crushing disc position through the discharge pipe, so that the heat resources can be used to pre-crush the coal blocks, thereby further improving the crushing efficiency.

[0031] In summary, by controlling the amount of coal blocks added to the feed box and then performing preliminary crushing, it is ensured that the coal blocks entering the screening drum in each batch are of almost equal specifications and are relatively easy to crush. Then, after multiple crushing and screening through the screening drum, the combustion efficiency of coal injection is further improved to ensure that a sufficient amount of high-temperature blast furnace gas can be generated. The water vapor boiled by these high-temperature gases generates power when entering the rotating turbine, which facilitates the pre-crushing of the crushed blocks inside the feed box, thereby comprehensively recycling various energy sources to maximize the benefits and energy utilization of coal injection steelmaking. At the same time, the principle of the speed box is utilized and improved, better crushing and efficient operation are achieved, and automatic and convenient coal blowing technology is realized, so that the combustion rate can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 It is a schematic diagram of the method of the present invention;

[0034] Figure 2 It is a schematic structural diagram of the present invention;

[0035] Figure 3 This is a schematic diagram of the installation structure of the screening drum of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the crushing and screening assembly of the present invention;

[0037] Figure 5 This is a schematic diagram of the installation structure of the movable gear ring of the present invention;

[0038] Figure 6 This is a schematic diagram of the installation structure of the crushing teeth of the present invention;

[0039] Figure 7 It is a schematic structural diagram of the temperature control assembly of the present invention;

[0040] Figure 8 Schematic diagram of the installation structure of the water inlet pipe of the present invention;

[0041] Figure 9 Schematic diagram of the installation structure of the steam pipeline of the present invention;

[0042] Figure 10 It is a structural schematic diagram of the feed assembly of the present invention;

[0043] Numbers in the figure: 1, pulverized coal pipe;

[0044] 2. Crushing and screening assembly; 201. Supporting trough plate frame; 202. Rotating bearing; 203. Supporting rotating rod; 204. Screening drum; 205. Screening holes; 206. Connecting gear; 207. Planetary gear plate; 208. Active roller; 209. Crushing disk; 210. Fixed crushing ring; 211. Power cylinder; 212. Material receiving chamber; 213. Inner driven gear; 214. Top planetary disk; 215. Outer driven gear; 216. Movable gear ring; 217. Motor bracket; 218. Screening motor; 219. Motor cylinder; 220. Active gear; 221. Crushing gear; 222. Second crushing roller; 223. Discharge pipe;

[0045] 3. Temperature control assembly; 301. Air inlet pipe; 302. Main pipe; 303. Gas distribution pipe; 304. High-temperature evaporation pipe; 305. Connecting gas pipe; 306. Heat dissipation pipe; 307. Evaporation heating pipe; 308. Gas collecting pipe; 309. Cooling gas pipe; 310. Gas control valve; 311. Temperature-controlled evaporation box; 312. Fan chamber; 313. Evaporation water tank; 314. Water inlet pipe; 315. Top cover; 316. Steam pipe; 317. Steam turbine; 318. Steam air inlet pipe; 319. Rotating turbine; 320. Snap-in slot; 321. Exhaust pipe; 322. Transmission plate;

[0046] 4. Feed assembly; 401. Feed box; 402. Feed chute; 403. Feed pipe; 404. Partition plate; 405. Inclined feed partition; 406. Positioning shaft; 407. Rotating plate; 408. Crushing block; 409. Feed crushing chamber; 410. Feed guide chute. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0048] Example: Figure 1 As shown, the present invention provides a technical solution, a method for increasing the ratio of bituminous coal injection,

[0049] S1. Preliminary crushing: Steam drives the transmission disc 322 to rotate, which drives the rotating plate 407 to rise and fall, so as to continuously press the crushed pieces 408 toward the coal blocks, so as to quickly crush the coal blocks added to the bottom from the feed crushing chamber 409;

[0050] S2. Preheating: High-temperature gas is delivered to the heat pipe 306, so that heat can be delivered to the un-crushed coal blocks, thereby performing preliminary drying and further improving the coal injection combustion efficiency;

[0051] S3, fine crushing: The coal is poured into the middle of the multiple crushing disks 209 through the discharge pipe 403. At this time, the multiple active rollers 208 and the crushing disks 209 will crush the coal blocks, and the crushing disks 209 at different positions will crush the coal blocks more finely.

[0052] S4, rapid screening: The screening drum 204 is driven by the screening motor 218 to rotate at high speed, thereby generating centrifugal force. At this time, the centrifugal force will throw the coal powder that has been crushed to the standard through the screening holes 205 and into the inner side of the outer coal powder pipe 1;

[0053] S5. Cooling and Collection: Cooling the high-temperature gas, and finally transporting the high-temperature gas to the inside of the evaporation water tank 313 to boil water, so that the steam can be utilized, so as to facilitate people to store, transport and refine the gas resources, and further improve the comprehensive utilization efficiency of resources.

[0054] like Figure 2-8 As shown, a crushing and screening assembly 2 is installed inside the pulverized coal pipe 1;

[0055] The crushing and screening assembly 2 includes a supporting trough frame 201, a rotating bearing 202, a supporting rotating rod 203, a screening drum 204, a screening hole 205, a connecting gear 206, a planetary gear plate 207, a driving roller 208, a crushing disk 209, a fixed crushing ring 210, a power cylinder 211, a material receiving chamber 212, an inner driven gear 213, a top planetary disk 214, an outer driven gear 215, a movable gear ring 216, a motor bracket 217, a screening motor 218, a motor cylinder 219, a driving gear 220, crushing teeth 221, a second crushing roller 222 and a discharge pipe 223;

[0056] A supporting slot frame 201 is installed at the bottom of the inner side of the pulverized coal pipe 1, and a rotating bearing 202 is embedded in the inner side of the supporting slot frame 201. A supporting rotating rod 203 is installed on the inner side of the rotating bearing 202. A screening drum 204 is installed on the top of the supporting rotating rod 203. Screening holes 205 are provided on the outer side of the screening drum 204. A connecting gear 206 is installed at the bottom position of the inner side of the screening drum 204. A planetary gear disk 207 is meshed with the outer side of the connecting gear 206. There are several planetary gear disks 207, which are meshed at the outer side of the connecting gear 206 at equal angles to facilitate the rotation of the planetary gear disk 207. An active roller 208 is installed on the top of the planetary gear disk 207. A crushing disk 209 is connected to the outer side of the active roller 208. A fixed crushing ring 210 is installed on the inner side of the screening drum 204, and a power cylinder 211 is installed on the top of the screening drum 204.

[0057] A material receiving chamber 212 is provided on the inner side of the pulverized coal pipe 1. An inner driven tooth 213 is provided at the inner bottom of the power cylinder 211. A top planetary disk 214 is meshed with the inner side of the power cylinder 211. An outer driven tooth 215 is provided at the outer top of the power cylinder 211. A movable gear ring 216 is meshed with the inner side of the inner driven tooth 213.

[0058] A motor bracket 217 is installed on the outside of the coal powder pipe 1, and a screening motor 218 is installed at one end of the motor bracket 217. A motor barrel 219 is sleeved on the outside of the screening motor 218. A driving gear 220 is installed at the transmission end of the screening motor 218, and the driving gear 220 is engaged with the external driven gear 215. The input end of the screening motor 218 is electrically connected to the output end of the external power supply, which is conducive to the transmission power. The outside of the crushing disk 209 is connected to the crushing teeth 221, the bottom end of the top planetary disk 214 is installed with a second crushing roller 222, and the bottom end of the coal powder pipe 1 is installed with a discharge pipe 223.

[0059] A temperature control assembly 3 is provided at the bottom of the pulverized coal pipe 1;

[0060] The temperature control assembly 3 includes an air inlet pipe 301, a main pipe 302, an air distribution pipe 303, a high-temperature evaporation pipe 304, a connecting air delivery pipe 305, a heat dissipation pipe 306, an evaporation heating pipe 307, an air collecting pipe 308, a cooling air pipe 309, a gas control valve 310, a temperature-controlled evaporation box 311, a fan chamber 312, an evaporation water tank 313, a water inlet pipe 314, a top cover 315, a steam pipe 316, a steam turbine 317, a steam air inlet pipe 318, a rotating turbine 319, a clamping groove 320, an exhaust pipe 321, and a transmission plate 322.

[0061] The bottom end of the pulverized coal pipe 1 is provided with an air inlet pipe 301, one end of the air inlet pipe 301 is connected to the main pipe 302, the outlet end of the main pipe 302 is connected to the gas distribution pipe 303, the outlet end of the gas distribution pipe 303 is connected to the high-temperature evaporation pipe 304, and the high-temperature evaporation pipe 304 is provided with a plurality of high-temperature evaporation pipes 304, which are equidistantly installed at the inner side of the discharge pipe 223 to facilitate heating the water source. One end of the high-temperature evaporation pipe 304 is connected to the gas supply pipe 302. The outlet end of the gas pipe 305 is connected to the heat dissipation pipe 306, the outlet end of the heat dissipation pipe 306 is connected to the evaporation heating pipe 307, the outlet end of the evaporation heating pipe 307 is connected to the gas collecting pipe 308, the outlet end of the gas collecting pipe 308 is connected to the cooling gas pipe 309, the outside of the cooling gas pipe 309 is equipped with a gas control valve 310, the outside of the evaporation heating pipe 307 is equipped with a temperature control evaporation box 311, the inside of the temperature control evaporation box 311 is equipped with a gas control valve 310, and the outside of the evaporation heating pipe 307 is equipped with a temperature control evaporation box 311. A fan chamber 312 is provided, and a fan chamber 312 is provided on the inner side of the temperature-controlled evaporation box 311. An evaporation water tank 313 is provided on one side of the fan chamber 312. The water inlet end of the top of the evaporation water tank 313 is connected to the water inlet pipe 314, and the water inlet pipe 314 is connected to an external water source. The input end of the gas control valve 310 is electrically connected to the output end of the external power supply to facilitate water inlet. A top cover 315 is installed on the top of the evaporation water tank 313, and the air outlet end of the top cover 315 is connected to a steam pipe 316. A steam turbine 317 is provided on the top of the top cover 315, and the air inlet end of the steam turbine 317 is connected to a steam inlet pipe 318. A rotating turbine 319 is installed on the inner side of the steam turbine 317. A clamping groove 320 is provided at the top of the top cover 315 at a position corresponding to the evaporation heating tube 307. The outer side of the rotating turbine 319 is connected to the exhaust pipe 321, and the transmission end of the rotating turbine 319 is connected to a transmission disk 322.

[0062] A feed assembly 4 is installed on the top of the pulverized coal pipe 1;

[0063] The feeding assembly 4 includes a feeding box 401, a feeding chute 402, a feeding pipe 403, a partition plate 404, an inclined feeding partition 405, a positioning shaft 406, a rotating plate 407, a crushing block 408, a feeding crushing chamber 409 and a guide chute 410;

[0064] A feed box 401 is provided at the top of the pulverized coal pipe 1, and a discharge chute 402 is provided at the bottom of the feed box 401. A discharge pipe 403 is connected to the corresponding position of the bottom end of the feed box 401 and the discharge chute 402. A funnel is installed at the corresponding position of the bottom end of the feed box 401 and the discharge pipe 403. The discharge pipe 403 and the feed box 401 are connected through the funnel to facilitate the collection of materials. A partition plate 404 is installed on the inner side of the feed box 401, and an inclined feed partition plate 405 is installed on the top of the partition plate 404. The transmission disk 322 is provided with a plurality of separators. A positioning shaft 406 is installed on one end face, and a rotating plate 407 is rotatably sleeved on the outer side of the positioning shaft 406. A rotating hole is opened on the inner side of the rotating plate 407 at the position corresponding to the positioning shaft 406. The rotating plate 407 is rotatably connected to the positioning shaft 406 through the rotating hole, which is conducive to crushing the coal blocks. A crushing block 408 is welded to the bottom end of the rotating plate 407, and a feed crushing chamber 409 is formed between the inclined feed partition 405 and the feed box 401. A material guide trough 410 is formed between the bottom end of the partition plate 404 and the feed box 401.

[0065] The working principle and use process of the present invention are as follows: First, the screening motor 218 is turned on to drive the outer driven gear 215 on the outside of the power cylinder 211 to rotate, thereby driving the supporting rotating rod 203 at the bottom of the screening drum 204 to rotate on the inside of the rotating bearing 202, and then the screening drum 204 can be rotated on the inside of the pulverized coal pipe 1 through the rotating bearing 202, and then the connecting gear 206 can be driven to rotate by the screening drum 204, and then the multiple planetary gear discs 207 can be driven to rotate. At this time, the multiple top planetary discs 214 will also rotate on the outside of the movable gear ring 216, thereby driving The multiple active rollers 208 and the crushing disks 209 are driven to rotate, and then the coal blocks can be fed into the middle position of the multiple crushing disks 209 through the feeding pipe 403. At this time, the multiple active rollers 208 and the crushing disks 209 will crush the coal blocks, and the multiple crushing disks 209 at different positions will crush the coal blocks more finely, and the crushing teeth 221 will carry the crushed coal powder to the inner side of the multiple fixed crushing rings 210, and continue to crush it through the crushing disks 209 and the fixed crushing rings 210. When the coal blocks are crushed, the multiple crushing disks 209 and the crushing teeth 221 can be used to crush the coal blocks. 1 is used for uniform and rapid crushing. At this time, the coal powder scraped by the crushing teeth 221 to the screening drum 204 will be crushed twice by the fixed crushing ring 210 and the crushing teeth 221, so as to achieve a better and more detailed crushing effect, further ensuring that the power can be comprehensively utilized. The power cylinder 211 is used to comprehensively utilize and distribute the power, so that the crushing and screening can reasonably and maximally utilize the power, save energy consumption, and improve the efficiency of coal injection. In addition, when crushing, the screening drum 204 is driven by the screening motor 218 to rotate at a high speed, so as to produce At this time, the centrifugal force will throw the coal powder that has been crushed to the standard out through the sieve hole 205 and to the inner side of the outer pulverized coal pipe 1 for collection. The coal powder that has reached the standard is collected at the position of the discharge pipe 223. The high-speed rotation of the sieve drum 204 will finely crush the coal blocks in batches, and then crush them through multiple crushing disks 209. The crushed coal blocks are screened by centrifugal force, and then the coal powder with suitable diameter can be quickly and effectively separated, thereby improving the combustion efficiency, thereby improving the coal injection efficiency of the blast furnace and effectively increasing the steelmaking efficiency.

[0066] Next, the high-temperature carbon monoxide gas produced by the steel-making blast furnace will be collected at the top of the blast furnace for easy recycling. It will be concentrated at the position of the air inlet pipe 301 to be transported to the position of the main pipe 302, and then diverted to the inner side of multiple high-temperature evaporation pipes 304 through the main pipe 302. Then, the sieved coal powder will flow to the outer side of multiple high-temperature evaporation pipes 304, and then evaporated at high temperature to evaporate the water in the coal powder. Then, the evaporated and dried coal powder will pass through each high-temperature evaporation pipe 304. The high-temperature gas flows through the gap between the coal and the coal injection device, and then the high-temperature gas enters the inner side of the heat dissipation pipe 306 through the connecting gas pipe 305, and then blows to the bottom position of the feed box 401 through the wind of the fan chamber 312, thereby preheating the coal blocks and then initially evaporating the moisture in the coal blocks. Then, these high-temperature gases heat the water inside the evaporation water tank 313, and the steam after the evaporated water enters the inner side of the steam pipe 316, and then enters the steam turbine 3 through the steam inlet pipe 318. 17, due to the water heating through the multiple evaporation heating pipes 307, sufficient water vapor will be generated at the same time, and then enter the rotating turbine 319 through the same steam pipe 316, so as to drive the rotating turbine 319 to rotate. At this time, the excess steam will be discharged through the exhaust pipe 321. By comprehensively recycling the high-temperature gas generated by the blast furnace, the crushed coal powder can be quickly and effectively dried at high temperature, thereby improving the combustion efficiency of the coal powder, and then the high-temperature coal gas is preliminarily cooled. The high-temperature gas is then transported to the position of the heat dissipation pipe 306, so that the heat can be transported to the uncrushed coal blocks for preliminarily drying, further improving the coal injection efficiency, and cooling the high-temperature gas for a second time. Finally, the high-temperature gas can be transported to the inside of the evaporation water tank 313 to boil water, so that the steam can be utilized to improve the comprehensive utilization efficiency of the excess heat of the blast furnace. At this time, the temperature of the high-temperature gas is completely dissipated, which is convenient for people to store, transport and refine coal gas resources, further improving the comprehensive utilization efficiency of resources.

[0067] Finally, the steam will drive the transmission disc 322 to rotate, thereby driving the positioning shaft 406 to rotate, so as to drive the rotating plate 407 to rise and fall and rotate, so as to continuously press the crushed block 408 toward the coal block, so as to quickly crush the coal block added to the bottom from the feed crushing chamber 409. At this time, some coal blocks that meet the standards will slide from the guide trough 410 to the discharge trough 402 position, and then the coal blocks will be added to the crushing disc 209 position through the discharge pipe 403, so that the heat resources can be used to pre-crush the coal blocks, further improving the crushing efficiency. The amount of coal blocks added each time is equal, and the coal blocks that are not completely crushed will remain on one side of the partition plate 404 and be crushed by the crushed block 408. The power for the preliminary crushing of the coal blocks comes from the rotating turbine 319, thereby further integrating and utilizing the power.

[0068] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for increasing the bituminous coal injection ratio, characterized in that: Including pulverized coal pipe, A crushing and screening assembly is installed on the inner side of the pulverized coal pipe; The crushing and screening assembly includes a supporting slot plate frame; A supporting trough plate frame is installed at the bottom of the inner side of the pulverized coal pipe, a rotating bearing is embedded in the inner side of the supporting trough plate frame, a supporting rotating rod is installed on the inner side of the rotating bearing, a screening drum is installed on the top of the supporting rotating rod, screening holes are opened on the outside of the screening drum, a connecting gear is installed at the bottom position of the inner side of the screening drum, a planetary gear disk is meshed on the outside of the connecting gear, a driving roller is installed on the top of the planetary gear disk, and a crushing disk is connected to the outside of the driving roller; A motor bracket is installed on the outside of the pulverized coal pipe, a screening motor is installed on one end of the motor bracket, an external driven gear is provided at the top of the outer side of the power cylinder, a driving gear is installed on the transmission end of the screening motor, and the driving gear is meshed with the external driven gear; The bottom of the pulverized coal pipe is provided with a temperature control component and a fan chamber; The temperature control assembly includes an air intake duct; An air inlet pipe is provided at the bottom end of the pulverized coal pipe, one end of the air inlet pipe is connected to the main pipe, the outlet end of the main pipe is connected to the air distribution pipe, the outlet end of the air distribution pipe is connected to the high-temperature evaporation pipe, one end of the high-temperature evaporation pipe is connected to the connecting air pipe, and the outlet end of the connecting air pipe is connected to the heat dissipation pipe; An evaporation water tank is provided on one side of the fan chamber, and a transmission disc is connected to the transmission end of the rotating turbine; A feed assembly is installed on the top of the pulverized coal pipe; The feeding assembly includes a feeding box and a positioning shaft; A feed box is provided on the top of the pulverized coal pipe, a discharge chute is provided at the bottom of the feed box, a discharge pipe is connected to the bottom of the feed box at the corresponding position of the discharge chute, a rotating plate is rotatably sleeved on the outer side of the positioning shaft, a crushing block is welded to the bottom end of the rotating plate, and a feed crushing chamber is formed between the inclined feed partition and the feed box; The method comprises the following steps: S1. Preliminary crushing: Steam drives the transmission disc to rotate, which drives the rotating plate to rise and fall, so as to continuously press the crushed pieces toward the coal blocks, so as to quickly crush the coal blocks added to the bottom of the feed crushing chamber; S2. Preheating: High-temperature gas is delivered to the heat pipe, so that heat can be delivered to the uncrushed coal blocks, thereby performing preliminary drying and further improving the coal injection combustion efficiency; S3, fine crushing: The coal is poured into the middle of the multiple crushing discs through the feed pipe. At this time, multiple active rollers and crushing discs will crush the coal blocks, and the crushing discs at different positions will crush the coal blocks more finely. S4. Rapid screening: The screening drum is driven by the screening motor to rotate at high speed, thereby generating centrifugal force. At this time, the centrifugal force will throw the coal powder that has been crushed to the standard out through the screening holes and into the inner side of the outer coal powder pipe; S5. Cooling and collection: Cool the high-temperature gas and finally transport it to the inside of the evaporation water tank to boil water, so as to utilize the steam, so as to facilitate people to store, transport and refine the gas resources, and further improve the comprehensive utilization efficiency of resources.

2. The method for increasing the bituminous coal injection ratio according to claim 1, characterized in that: A fixed crushing ring is installed on the inner side of the screening drum, a power cylinder is installed on the top of the screening drum, a material receiving cavity is opened on the inner side of the pulverized coal pipe, an inner driven tooth is provided at the inner bottom position of the power cylinder, the inner side of the power cylinder is engaged with a top planetary disk, the inner side of the inner driven tooth is engaged with a movable gear ring, the outer side of the screening motor is sleeved with a motor cylinder, the outer side of the crushing disk is connected with crushing teeth, the bottom end of the top planetary disk is installed with a second crushing roller, and the bottom end of the pulverized coal pipe is installed with a discharge pipe.

3. The method for increasing the bituminous coal injection ratio according to claim 2, characterized in that: There are a plurality of planetary gear discs, which are meshed at equal angles at the outer sides of the connecting gear.

4. The method for increasing the bituminous coal injection ratio according to claim 2, characterized in that: The input end of the screening motor is electrically connected to the output end of the external power supply.

5. The method for increasing the bituminous coal injection ratio according to claim 1, characterized in that: The air outlet end of the heat dissipation pipe is connected to the evaporation heating pipe, the air outlet end of the evaporation heating pipe is connected to the air collecting pipe, the air outlet end of the air collecting pipe is connected to the cooling air pipe, a gas control valve is installed on the outside of the cooling air pipe, a temperature-controlled evaporation box is provided on the outside of the evaporation heating pipe, a fan chamber is provided on the inside of the temperature-controlled evaporation box, the top water inlet end of the evaporation water tank is connected to the water inlet pipe, a top cover is installed on the top of the evaporation water tank, the air outlet end of the top cover is connected to the steam pipe, a steam turbine is provided on the top of the top cover, the air inlet end of the steam turbine is connected to the steam inlet pipe, a rotating turbine is installed on the inside of the steam turbine, a clamping groove is provided at the top of the top cover and the corresponding position of the evaporation heating pipe, and the outside of the rotating turbine is connected to the exhaust pipe.

6. The method for increasing the bituminous coal injection ratio according to claim 5, characterized in that: There are a plurality of high-temperature evaporation tubes, which are equidistantly installed at inner positions of the discharge pipe.

7. The method for increasing the bituminous coal injection ratio according to claim 5, characterized in that: The water inlet pipe is connected to an external water source, and the input end of the gas control valve is electrically connected to the output end of an external power supply.

8. The method for increasing the bituminous coal injection ratio according to claim 1, characterized in that: A partition plate is installed on the inner side of the feed box, an inclined feed partition plate is installed on the top of the partition plate, a positioning shaft is installed on one end face of the transmission disc, and a material guide trough is formed between the bottom end of the partition plate and the feed box.

9. The method for increasing the bituminous coal injection ratio according to claim 8, characterized in that: A rotation hole is provided on the inner side of the rotating plate at a position corresponding to the positioning shaft, and the rotating plate is rotatably connected to the positioning shaft through the rotation hole.

10. The method for increasing the bituminous coal injection ratio according to claim 8, characterized in that: A funnel is installed at the bottom end of the feed box and at a position corresponding to the discharge pipe, and the discharge pipe and the feed box are connected through the funnel.

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