Blast furnace pulverized coal dehydration injection device

Abstract

The invention discloses a blast furnace pulverized coal dehydration injection device which comprises a pulverized coal preheating module used for preheating pulverized coal to enable moisture in the pulverized coal to be changed into water vapor; the pulverized coal dehydration module is used for dehydrating the pulverized coal, so that water vapor is separated from the pulverized coal; the pulverized coal storage tank is used for storing the pulverized coal separated by the pulverized coal dehydration module; and the pulverized coal injection module is used for receiving the pulverized coal in the pulverized coal storage tank and injecting the pulverized coal into the blast furnace. Pulverized coal is preheated by the pulverized coal preheating module to the temperature at which water can be evaporated, then a mixture of the pulverized coal and water vapor enters the pulverized coal dehydration module, the water vapor is discharged from the pulverized coal dehydration module, the pulverized coal is collected and enters the pulverized coal storage tank, and the pulverized coal is injected into the blast furnace in the next step. By reducing moisture in the pulverized coal, accidents can be reduced, heat is absorbed in the pulverized coal conveying process for preheating, the burn-off rate of the pulverized coal is increased, and energy conservation and consumption reduction can be achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metallurgical iron-making pulverized coal injection, and particularly relates to a blast furnace pulverized coal dehydration injection device. BACKGROUND

[0002] The injection auxiliary fuel technology is a new technology widely used in modern blast furnace iron-making production, and the injection of pulverized coal is increasingly valued by countries or regions around the world. In the prior art, the pulverized coal output from the coal workshop contains water. Appropriate amount of water is beneficial to the injection of pulverized coal, but in cold north and humid south, excessive water in the pulverized coal is not conducive to the injection of pulverized coal. Excessive water will cause the injection gun to be blocked, and will cause chemical reaction to absorb heat when entering the blast furnace, and will also reduce the burnout rate of the pulverized coal. Therefore, it is necessary to provide a blast furnace pulverized coal dehydration injection device to reduce the water content in the pulverized coal. SUMMARY

[0003] The purpose of the present application is to provide a blast furnace pulverized coal dehydration injection device to solve the problem of high water content in the pulverized coal in the prior art, which causes the absorption of heat in the blast furnace, reduces the burnout rate of the pulverized coal, and has high cost.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a blast furnace pulverized coal dehydration injection device, comprising: a pulverized coal preheating module for preheating the pulverized coal to make the water in the pulverized coal into water vapor; a pulverized coal dehydration module for dehydrating the pulverized coal to separate the water vapor from the pulverized coal; a pulverized coal storage tank for storing the pulverized coal separated by the pulverized coal dehydration module; and a pulverized coal injection module for receiving the pulverized coal from the pulverized coal storage tank and injecting the pulverized coal into the blast furnace.

[0005] As an optional embodiment of the above-mentioned technical scheme, the pulverized coal preheating module comprises a pulverized coal preheater and a heat exchange oil circulation system. The input end of the pulverized coal preheater is provided with a pulverized coal injection pipeline one in communication with the coal workshop, and the output end of the pulverized coal preheater is provided with a pulverized coal injection pipeline two in communication with the pulverized coal dehydration module. The heat exchange oil circulation system is used to preheat the pulverized coal to the temperature of the pulverized coal dehydration by using the heat transfer oil, so that the water in the pulverized coal preheater becomes water vapor.

[0006] As an optional embodiment of the above-mentioned technical scheme, the coal workshop and the blast furnace are connected by a pulverized coal injection pipeline four. The pulverized coal injection pipeline four is sequentially provided with a pulverized coal valve one and a pulverized coal valve three. A three-way pipe for connecting the pulverized coal injection pipeline one is arranged between the pulverized coal valve one and the pulverized coal valve three. The pulverized coal injection pipeline one is sequentially provided with a pulverized coal valve two and a pulverized coal valve four. The pulverized coal injection pipeline two is sequentially provided with a pulverized coal valve five and a pulverized coal valve six.

[0007] As an optional implementation of the above technical solution, the heat exchange oil circulation system includes a heat transfer oil circulator, a first heat transfer oil pipeline, and a second heat transfer oil pipeline. One end of the first heat transfer oil pipeline is connected to the output end of the heat transfer oil circulator, and the other end of the first heat transfer oil pipeline is connected to the input end of the heat exchange channel of the pulverized coal preheater. One end of the second heat transfer oil pipeline is connected to the input end of the heat transfer oil circulator, and the other end of the second heat transfer oil pipeline is connected to the output end of the heat exchange channel of the pulverized coal preheater.

[0008] As an optional implementation of the above technical solution, the heat exchange oil circulation system further includes a heat transfer oil pipeline three and an expansion tank. One end of the heat transfer oil pipeline three is connected to the input end of the heat transfer oil circulator, and the other end of the heat transfer oil pipeline three is connected to the expansion tank.

[0009] As an optional implementation of the above technical solution, a heat transfer oil valve is provided on the first heat transfer oil pipeline, a heat transfer oil valve is provided on the second heat transfer oil pipeline, and an expansion tank valve is provided on the third heat transfer oil pipeline.

[0010] As an optional implementation of the above technical solution, the pulverized coal dewatering module includes a pulverized coal dewatering device one and a pulverized coal dewatering device two. The input end of the pulverized coal dewatering device one is connected to a pulverized coal injection pipeline two, and the output end of the pulverized coal dewatering device one is connected to a pulverized coal dewatering pipeline one and a coal storage pipeline one. The coal storage pipeline one is connected to a pulverized coal storage tank. The input end of the pulverized coal dewatering device two is connected to a pulverized coal injection pipeline three, and the output end of the pulverized coal dewatering device two is connected to a pulverized coal dewatering pipeline two and a coal storage pipeline two. The coal storage pipeline two is connected to a pulverized coal storage tank.

[0011] As an optional implementation of the above technical solution, the pulverized coal injection pipeline three is equipped with a pulverized coal valve seven, the pulverized coal dewatering pipeline one is equipped with a pulverized coal dewatering valve one, and the coal storage pipeline one is equipped with a coal storage valve one; the pulverized coal dewatering pipeline two is equipped with a pulverized coal dewatering valve two, and the coal storage pipeline two is equipped with a coal storage valve two.

[0012] As an optional implementation of the above technical solution, it also includes a gas dehydrator, the input end of which is connected to an exhaust gas pipeline, both the coal powder dehydration pipeline and the coal powder dehydration pipeline are connected to the exhaust gas pipeline, and the output end of the gas dehydrator is connected to an exhaust gas pipeline for connecting to the coal powder workshop.

[0013] As an optional implementation of the above technical solution, the pulverized coal injection module includes a pulverized coal injection tank 1, a pulverized coal injection tank 2, a nitrogen pipeline 1, and a nitrogen pipeline 2. A coal storage pipeline 3 connects the pulverized coal injection tank 1 to the pulverized coal storage tank, and a pulverized coal injection pipeline 5 connects the pulverized coal injection tank 1 to the blast furnace. A booster 1 is provided on the pulverized coal injection pipeline 5. A pressurization pipeline 1 and a fluidization pipeline 1 connect the nitrogen pipeline 1 to the pulverized coal injection tank 1, and the nitrogen pipeline 1 is connected to the booster 1. A coal storage pipeline four connects the pulverized coal injection tank two to the pulverized coal storage tank, and a pulverized coal injection pipeline six connects the pulverized coal injection tank two to the blast furnace. A booster two is installed on the pulverized coal injection pipeline six. A pressurization pipeline two and a fluidization pipeline two connect the nitrogen pipeline two to the pulverized coal injection tank two, and the nitrogen pipeline two is connected to the booster two.

[0014] As an optional implementation of the above technical solution, the coal storage pipeline three is equipped with a coal storage valve three, the pressurization pipeline one is equipped with a pressurization valve one, the fluidization pipeline one is equipped with a fluidization valve one, the pulverized coal injection pipeline five is equipped with pulverized coal valve nine and pulverized coal valve ten, the booster one is located between pulverized coal valve nine and pulverized coal valve ten, and the nitrogen pipeline one is equipped with a gas replenishment valve one at the end near the booster one; the coal storage pipeline four is equipped with a coal storage valve four, the pressurization pipeline two is equipped with a pressurization valve two, the fluidization pipeline two is equipped with a fluidization valve two, the pulverized coal injection pipeline six is ​​equipped with pulverized coal valve eleven and pulverized coal valve twelve, the booster two is located between pulverized coal valve eleven and pulverized coal valve twelve, and the nitrogen pipeline two is equipped with a gas replenishment valve two at the end near the booster two.

[0015] The beneficial effects of this invention are as follows: This invention provides a blast furnace pulverized coal dehydration injection device. Pulverized coal is preheated to a temperature at which moisture can evaporate by a pulverized coal preheating module. Then, the mixture of pulverized coal and steam enters the pulverized coal dehydration module, where the steam is discharged. The pulverized coal is collected in a pulverized coal storage tank, and then injected into the blast furnace. This invention is a refinement and supplement to pulverized coal injection equipment. By reducing the moisture content of the pulverized coal, accidents can be reduced. Utilizing the heat absorbed during pulverized coal transportation for preheating improves the combustion rate of the pulverized coal, thus saving energy and reducing consumption. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0017] In the diagram: 10-Pulverized coal preheater; 20-Pulverized coal dewatering device 1; 30-Pulverized coal dewatering device 2; 40-Pulverized coal storage tank; 50-Pulverized coal injection tank 1; 60-Pulverized coal injection tank 2; 70-Heat transfer oil circulator; 80-Expansion tank; 90-Gas dewatering device. 11-Pulverized coal valve one; 12-Pulverized coal valve two; 13-Pulverized coal valve three; 14-Pulverized coal valve four; 15-Pulverized coal valve five; 16-Pulverized coal valve six; 17-Pulverized coal valve seven; 18-Pulverized coal valve eight; 101 - Pulverized coal injection pipeline 1; 102 - Pulverized coal injection pipeline 2; 103 - Pulverized coal injection pipeline 3; 104 - Pulverized coal injection pipeline 4; 105 - Pulverized coal injection pipeline 5; 106 - Pulverized coal injection pipeline 6; 21-Pulverized coal dewatering valve one; 31-Pulverized coal dewatering valve two; 201-Pulverized Coal Dewatering Pipeline 1; 301-Pulverized Coal Dewatering Pipeline 2; 41-Coal storage valve one; 42-Coal storage valve two; 43-Coal storage valve three; 44-Coal storage valve four; 401 - Coal storage pipeline one; 402 - Coal storage pipeline two; 403 - Coal storage pipeline three; 404 - Coal storage pipeline four; 51-Pressure charging valve 1; 52-Fluidization valve 1; 53-Making gas valve 1; 54-Pulverized coal valve 9; 55-Booster 1; 56-Pulverized coal valve 10; 501 - Nitrogen line 1; 502 - Pressurization line 1; 503 - Fluidization line 1; 61-Pressure valve II; 62-Fluidization valve II; 63-Making gas valve II; 64-Pulverized coal valve XI; 65-Booster II; 66-Pulverized coal valve XII; 601 - Nitrogen line 2; 602 - Pressurization line 2; 603 - Fluidization line 2; 71-Heat transfer oil valve one; 72-Heat transfer oil valve two; 73-Expansion tank valve; 701 - Heat transfer oil pipeline one; 702 - Heat transfer oil pipeline two; 703 - Heat transfer oil pipeline three; 901 - Exhaust gas pipeline one; 902 - Exhaust gas pipeline two. Detailed Implementation

[0018] like Figure 1 As shown, this embodiment provides a blast furnace pulverized coal dehydration injection device, including a pulverized coal preheating module, a pulverized coal dehydration module, a pulverized coal storage tank 40, and a pulverized coal injection module. The pulverized coal workshop supplies pulverized coal to the pulverized coal preheating module; the pulverized coal preheating module is used to preheat the pulverized coal, causing the moisture in the pulverized coal to turn into water vapor; the pulverized coal dehydration module is used to dehydrate the pulverized coal, causing the water vapor to separate from the pulverized coal; the pulverized coal storage tank 40 is used to store the pulverized coal separated by the pulverized coal dehydration module; the pulverized coal injection module is used to receive the pulverized coal from the pulverized coal storage tank 40 and inject the pulverized coal into the blast furnace.

[0019] This invention provides a blast furnace pulverized coal dehydration injection device. Pulverized coal is preheated to a temperature at which moisture can evaporate by a pulverized coal preheating module. Then, the mixture of pulverized coal and steam enters the pulverized coal dehydration module, where the steam is discharged. The pulverized coal is collected in a pulverized coal storage tank 40, and then injected into the blast furnace. This invention is a refinement and supplement to pulverized coal injection equipment. By reducing the moisture content of the pulverized coal, accidents can be reduced. Utilizing the heat absorbed during pulverized coal transportation for preheating improves the combustion rate of the pulverized coal, thus saving energy and reducing consumption.

[0020] Specifically, the pulverized coal preheating module includes a pulverized coal preheater 10 and a heat exchange oil circulation system. The input end of the pulverized coal preheater 10 is equipped with a pulverized coal injection pipeline 101 connected to the pulverized coal workshop, and the output end of the pulverized coal preheater 10 is equipped with a pulverized coal injection pipeline 102 connected to the pulverized coal dehydration module. The heat exchange oil circulation system is used to preheat the pulverized coal to the temperature for pulverized coal dehydration using heat transfer oil, so that the moisture in the pulverized coal preheater 10 is converted into water vapor. A pulverized coal injection pipeline 104 connects the pulverized coal workshop and the blast furnace. Pulverized coal injection pipeline 104 is equipped with pulverized coal valve 11 and pulverized coal valve 313 in sequence. A tee pipe for connecting pulverized coal injection pipeline 101 is provided between pulverized coal valve 11 and pulverized coal valve 313. Pulverized coal injection pipeline 101 is equipped with pulverized coal valve 212 and pulverized coal valve 414 in sequence. Pulverized coal injection pipeline 2102 is equipped with pulverized coal valve 515 and pulverized coal valve 616 in sequence.

[0021] In one specific embodiment, the heat exchange oil circulation system includes a heat transfer oil circulator 70, a first heat transfer oil pipeline 701, and a second heat transfer oil pipeline 702. One end of the first heat transfer oil pipeline 701 is connected to the output end of the heat transfer oil circulator 70, and the other end of the first heat transfer oil pipeline 701 is connected to the input end of the heat exchange channel of the pulverized coal preheater 10. One end of the second heat transfer oil pipeline 702 is connected to the input end of the heat transfer oil circulator 70, and the other end of the second heat transfer oil pipeline 702 is connected to the output end of the heat exchange channel of the pulverized coal preheater 10. Preferably, the heat exchange oil circulation system further includes a third heat transfer oil pipeline 703 and an expansion tank 80. One end of the third heat transfer oil pipeline 703 is connected to the input end of the heat transfer oil circulator 70, and the other end of the third heat transfer oil pipeline 703 is connected to the expansion tank 80. A heat transfer oil valve 71 is installed on heat transfer oil pipeline 1 701, a heat transfer oil valve 72 is installed on heat transfer oil pipeline 2 702, and an expansion tank valve 73 is installed on heat transfer oil pipeline 3 703.

[0022] In this embodiment, the pulverized coal dewatering module includes a pulverized coal dewatering device 20 and a pulverized coal dewatering device 30, with one of the two serving as a backup. The input end of the pulverized coal dewatering device 20 is connected to a pulverized coal injection pipeline 102, and the output end of the pulverized coal dewatering device 20 is connected to a pulverized coal dewatering pipeline 201 and a coal storage pipeline 401, which is connected to a pulverized coal storage tank 40. The input end of the pulverized coal dewatering device 30 is connected to a pulverized coal injection pipeline 103 between it and the pulverized coal preheater 10, and the output end of the pulverized coal dewatering device 30 is connected to a pulverized coal dewatering pipeline 301 and a coal storage pipeline 402, which is connected to a pulverized coal storage tank 40. The pulverized coal injection pipeline 3103 is equipped with pulverized coal valve 717, the pulverized coal dewatering pipeline 1201 is equipped with pulverized coal dewatering valve 121, and the coal storage pipeline 1401 is equipped with coal storage valve 141; the pulverized coal dewatering pipeline 2301 is equipped with pulverized coal dewatering valve 231, and the coal storage pipeline 2402 is equipped with coal storage valve 242.

[0023] The blast furnace pulverized coal dehydration injection device of the present invention also includes a gas dehydrator 90. The input end of the gas dehydrator 90 is connected to a waste gas pipeline 901. The pulverized coal dehydration pipeline 201 and the pulverized coal dehydration pipeline 301 are both connected to the waste gas pipeline 901. The output end of the gas dehydrator 90 is connected to a waste gas pipeline 902 for connecting to the pulverized coal workshop.

[0024] In one specific embodiment, the pulverized coal injection module includes a pulverized coal injection tank 50, a second pulverized coal injection tank 60, a first nitrogen pipeline 501, and a second nitrogen pipeline 601. A third coal storage pipeline 403 connects the first pulverized coal injection tank 50 to the pulverized coal storage tank 40. A fifth pulverized coal injection pipeline 105 connects the first pulverized coal injection tank 50 to the blast furnace, and a booster 55 is provided on the fifth pulverized coal injection pipeline 105. A pressurization pipeline 502 connects the first nitrogen pipeline 501 to the first pulverized coal injection tank 50. Fluidization line 1 (503) and nitrogen line 1 (501) are connected to booster 1 (55). A coal storage line 4 (404) connects pulverized coal injection tank 2 (60) to pulverized coal storage tank 40. A pulverized coal injection line 6 (106) connects pulverized coal injection tank 2 (601) to the blast furnace, and booster 2 (65) is installed on pulverized coal injection line 6 (106). A pressurization line 2 (602) and fluidization line 2 (603) connect nitrogen line 2 (601) to pulverized coal injection tank 2 (600), and booster 2 (65) are connected. Pulverized coal injection tanks 1 (50) and 2 (600) are switched on and off alternately according to production conditions to improve production efficiency.

[0025] Coal storage pipeline 3403 is equipped with coal storage valve 343; pressurization pipeline 1502 is equipped with pressurization valve 151; fluidization pipeline 1503 is equipped with fluidization valve 152; pulverized coal injection pipeline 5105 is equipped with pulverized coal valve 954 and pulverized coal valve 1056; booster 155 is located between pulverized coal valve 954 and pulverized coal valve 1056; nitrogen pipeline 1501 is equipped with a supplementary gas valve 153 at the end near booster 155; coal storage The pipeline 404 is equipped with a coal storage valve 444, the pressurization pipeline 2602 is equipped with a pressurization valve 261, the fluidization pipeline 2603 is equipped with a fluidization valve 262, the pulverized coal injection pipeline 6106 is equipped with a pulverized coal valve 1164 and a pulverized coal valve 1266, the booster 265 is located between the pulverized coal valve 1164 and the pulverized coal valve 1266, and the nitrogen pipeline 2601 is equipped with a supplementary gas valve 263 at the end near the booster 265.

[0026] The present invention provides a blast furnace pulverized coal dehydration injection device, the working process of which is as follows: 1. Pulverized Coal Preheating: During normal pulverized coal injection production, pulverized coal valves 11, 12, 14, 15, and 16 are open, while valves 313 and 818 are closed. Pulverized coal enters the pulverized coal preheater 10 through pulverized coal injection pipeline 101. In the pulverized coal preheater 10, the pulverized coal is heated by high-temperature heat transfer oil to a temperature at which it can be dehydrated. At this point, some of the moisture in the pulverized coal separates from the coal and becomes water vapor. A gas-solid mixture of gas, pulverized coal, and water vapor enters the pulverized coal dehydrator 20 through pulverized coal injection pipeline 2 (102). At this time, the pulverized coal valve is closed, and pulverized coal injection pipeline 3 (103) and pulverized coal dehydrator 2 (30) are on standby. The heat transfer oil in the heat transfer oil circulator 70 enters the pulverized coal preheater 10 through heat transfer oil pipeline 1 (701) to heat the water-containing pulverized coal. After the pulverized coal is heated and cooled, the heat transfer oil returns to the heat transfer oil circulator 70 through heat transfer oil pipeline 2 (702) to be heated again, and the cycle repeats. The expansion tank 80 absorbs the expansion after the heat transfer oil is heated through heat transfer oil pipeline 3, while maintaining stable pipeline pressure.

[0027] 2. Coal powder dewatering: When the coal powder dewatering valve 21 is opened, the water vapor in the coal powder dewatering device 20 is discharged through the coal powder dewatering pipeline 201 to achieve coal powder dewatering. The discharged high-temperature waste gas is transformed into dry high-temperature gas through the waste gas pipeline 901 and the gas dewatering device 90, and then transported to the coal powder workshop for recycling through the waste gas pipeline 902.

[0028] 3. Coal powder storage: The coal powder dewatering device has the functions of exhaust and coal powder collection. When the coal storage valve 1 41 and the coal storage valve 3 43 are opened, the dewatered coal powder enters the coal powder storage tank 40 from the coal powder dewatering device 1 20 through the coal storage pipeline 1 401, and then enters the coal powder injection tank 1 50 through the coal storage pipeline 3 403. The coal storage valve 3 43 and the coal storage valve 44 are switched on and off alternately according to the production situation. The coal powder can enter the coal powder injection tank 1 50 and the coal powder injection tank 2 60 alternately through the coal storage pipeline 3 403 and the coal storage pipeline 404.

[0029] 4. Pulverized coal injection: The high-temperature pulverized coal from pulverized coal injection tank 1 (50) and pulverized coal injection tank 2 (60) is pressurized, fluidized, and supplemented with gas before being injected into the blast furnace.

[0030] In this invention, pulverized coal injected from the pulverized coal injection workshop enters the pulverized coal preheater 10, where it is preheated by high-temperature heat transfer oil to a temperature at which moisture can evaporate. Then, the mixture of pulverized coal and steam enters the pulverized coal dehydrator, where the water that has been converted into steam is discharged. The pulverized coal is collected and enters the pulverized coal storage tank 40. The pulverized coal alternately enters two pulverized coal injection tanks. In the next step, the pulverized coal is injected into the blast furnace. This invention is a refinement and supplement to the pulverized coal injection system. By reducing the moisture content in the pulverized coal, accidents can be reduced. Preheating is achieved by absorbing heat during the pulverized coal transportation process, which also improves the combustion rate of the pulverized coal, reduces the accident of pulverized coal injection gun blockage, facilitates the smooth operation of pulverized coal injection, and saves energy.

[0031] In the description of this invention, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. They can refer to fixed connections, detachable connections, or integral connections; they can be mechanical or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this invention. Furthermore, the specific features and structures described in the embodiments are included in at least one implementation method. Those skilled in the art can combine features from different implementation methods without contradiction. The scope of protection of this invention is not limited to the specific implementation methods described above. Based on the basic technical concept of this invention, implementation methods that can be conceived by those skilled in the art without creative effort are all within the scope of protection of this invention.

Claims

1. A blast furnace pulverized coal dewatering injection device, characterized in that, include: The pulverized coal preheating module is used to preheat pulverized coal, turning the moisture in the pulverized coal into water vapor; The coal powder dehydration module is used to dehydrate coal powder, separating water vapor from the coal powder; A pulverized coal storage tank (40) is used to store pulverized coal separated by the pulverized coal dewatering module; and The pulverized coal injection module is used to receive pulverized coal from the pulverized coal storage tank (40) and inject the pulverized coal into the blast furnace.

2. The blast furnace pulverized coal dewatering injection device according to claim 1, characterized in that, The pulverized coal preheating module includes a pulverized coal preheater (10) and a heat exchange oil circulation system. The input end of the pulverized coal preheater (10) is provided with a pulverized coal injection pipeline (101) connected to the pulverized coal workshop, and the output end of the pulverized coal preheater (10) is provided with a pulverized coal injection pipeline (102) connected to the pulverized coal dewatering module. The heat exchange oil circulation system is used to preheat the pulverized coal to the temperature of pulverized coal dewatering using heat transfer oil, so that the water in the pulverized coal preheater (10) is converted into water vapor.

3. The blast furnace pulverized coal dewatering injection device according to claim 2, characterized in that, The pulverized coal workshop is connected to the blast furnace by a pulverized coal injection pipeline four (104). Pulverized coal injection pipeline four (104) is equipped with pulverized coal valve one (11) and pulverized coal valve three (13) in sequence. A tee pipe for connecting pulverized coal injection pipeline one (101) is provided between pulverized coal valve one (11) and pulverized coal valve three (13). Pulverized coal injection pipeline one (101) is equipped with pulverized coal valve two (12) and pulverized coal valve four (14) in sequence. Pulverized coal injection pipeline two (102) is equipped with pulverized coal valve five (15) and pulverized coal valve six (16) in sequence.

4. The blast furnace pulverized coal dewatering injection device according to claim 2, characterized in that, The heat exchange oil circulation system includes a heat transfer oil circulator (70), a heat transfer oil pipeline one (701), and a heat transfer oil pipeline two (702). One end of the heat transfer oil pipeline one (701) is connected to the output end of the heat transfer oil circulator (70), and the other end of the heat transfer oil pipeline one (701) is connected to the input end of the heat exchange channel of the pulverized coal preheater (10). One end of the heat transfer oil pipeline two (702) is connected to the input end of the heat transfer oil circulator (70), and the other end of the heat transfer oil pipeline two (702) is connected to the output end of the heat exchange channel of the pulverized coal preheater (10).

5. The blast furnace pulverized coal dewatering injection device according to claim 4, characterized in that, The heat exchange oil circulation system also includes a heat transfer oil pipeline three (703) and an expansion tank (80). One end of the heat transfer oil pipeline three (703) is connected to the input end of the heat transfer oil circulator (70), and the other end of the heat transfer oil pipeline three (703) is connected to the expansion tank (80). A heat transfer oil valve one (71) is provided on the heat transfer oil pipeline one (701), a heat transfer oil valve two (72) is provided on the heat transfer oil pipeline two (702), and an expansion tank valve (73) is provided on the heat transfer oil pipeline three (703).

6. The blast furnace pulverized coal dewatering injection device according to claim 1, characterized in that, The coal powder dewatering module includes a coal powder dewatering device one (20) and a coal powder dewatering device two (30). The input end of the coal powder dewatering device one (20) is connected to the coal powder injection pipeline two (102). The output end of the coal powder dewatering device one (20) is connected to the coal powder dewatering pipeline one (201) and the coal storage pipeline one (401). The coal storage pipeline one (401) is connected to the coal powder storage tank (40). The input end of the coal powder dewatering device two (30) is connected to the coal powder preheater (10) via a coal powder injection pipeline three (103). The output end of the coal powder dewatering device two (30) is connected to the coal powder dewatering pipeline two (301) and the coal storage pipeline two (402). The coal storage pipeline two (402) is connected to the coal powder storage tank (40).

7. The blast furnace pulverized coal dewatering injection device according to claim 6, characterized in that, The pulverized coal injection pipeline three (103) is equipped with pulverized coal valve seven (17), the pulverized coal dewatering pipeline one (201) is equipped with pulverized coal dewatering valve one (21), the coal storage pipeline one (401) is equipped with coal storage valve one (41); the pulverized coal dewatering pipeline two (301) is equipped with pulverized coal dewatering valve two (31), and the coal storage pipeline two (402) is equipped with coal storage valve two (42).

8. The blast furnace pulverized coal dewatering injection device according to claim 6, characterized in that, It also includes a gas dehydrator (90), the input end of which is connected to a waste gas pipeline (901), the coal powder dehydration pipeline (201) and the coal powder dehydration pipeline (301) are both connected to the waste gas pipeline (901), and the output end of the gas dehydrator (90) is connected to a waste gas pipeline (902) for connecting to the coal powder workshop.

9. The blast furnace pulverized coal dewatering injection device according to claim 1, characterized in that, The pulverized coal injection module includes a pulverized coal injection tank 1 (50), a pulverized coal injection tank 2 (60), a nitrogen pipeline 1 (501) and a nitrogen pipeline 2 (601). A coal storage pipeline 3 (403) is connected between the pulverized coal injection tank 1 (50) and the pulverized coal storage tank (40). A pulverized coal injection pipeline 5 (105) is connected between the pulverized coal injection tank 1 (50) and the blast furnace. A booster 1 (55) is provided on the pulverized coal injection pipeline 5 (105). A pressurization pipeline 1 (502) and a fluidization pipeline 1 (503) are connected between the nitrogen pipeline 1 (501) and the pulverized coal injection tank 1 (50). The nitrogen pipeline 1 (501) is connected to the booster 1 (55). A coal storage pipeline (404) connects the pulverized coal injection tank 2 (60) to the pulverized coal storage tank (40), and a pulverized coal injection pipeline (106) connects the pulverized coal injection tank 2 (60) to the blast furnace. A booster (65) is provided on the pulverized coal injection pipeline (106). A pressurization pipeline (602) and a fluidization pipeline (603) connect the nitrogen pipeline (601) to the pulverized coal injection tank 2 (60), and the nitrogen pipeline (601) is connected to the booster (65).

10. The blast furnace pulverized coal dewatering injection device according to claim 9, characterized in that, The coal storage pipeline three (403) is equipped with a coal storage valve three (43), the pressurization pipeline one (502) is equipped with a pressurization valve one (51), the fluidization pipeline one (503) is equipped with a fluidization valve one (52), the pulverized coal injection pipeline five (105) is equipped with a pulverized coal valve nine (54) and a pulverized coal valve ten (56), the booster one (55) is located between the pulverized coal valve nine (54) and the pulverized coal valve ten (56), and the nitrogen pipeline one (501) is equipped with a gas replenishment valve one (53) at the end near the booster one (55); The coal storage pipeline 4 (404) is equipped with a coal storage valve 4 (44), the pressurization pipeline 2 (602) is equipped with a pressurization valve 2 (61), the fluidization pipeline 2 (603) is equipped with a fluidization valve 2 (62), the pulverized coal injection pipeline 6 (106) is equipped with a pulverized coal valve 11 (64) and a pulverized coal valve 12 (66), the booster 2 (65) is located between the pulverized coal valve 11 (64) and the pulverized coal valve 12 (66), and the nitrogen pipeline 2 (601) is equipped with a supplementary gas valve 2 (63) at one end near the booster 2 (65).

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