Pulverized coal production system and method for blast furnace

Abstract

The invention provides a pulverized coal production system and method for a blast furnace, the pulverized coal production system comprises a storage part, a coal grinding device, a transfer storage assembly and an injection tank, and the coal grinding device is communicated with the storage part through a conveying assembly; the transfer storage assembly is communicated with the coal grinding device through a first pipeline, and the transfer storage assembly is connected with a temperature control assembly used for controlling the temperature; the injection tank is communicated with the transfer part through a second pipeline; the technical scheme provided by the invention at least has the beneficial effects that the temperature assembly and the temperature control assembly are arranged on the transfer assembly, so that the temperature of the transfer assembly can be kept, the constant temperature of the pulverized coal is ensured, the molecular thermal motion of the pulverized coal is improved, and the flowing property of the pulverized coal is enhanced; and the first filtering piece is arranged, impurities and foreign matter in the pulverized coal can be effectively screened out, the purity of the pulverized coal is improved, blocking of an injection pipeline of the injection tank and impact generated in the high-speed flowing process of the impurities are avoided, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of pulverized coal production, and specifically relates to a pulverized coal production system and method for a blast furnace. Background Art

[0002] The pulverized coal preparation system is an important subsystem of the pulverized coal injection process in a blast furnace. Its main task is to process the raw coal for injection into qualified pulverized coal, which is collected by a powder collection device and then enters the pulverized coal bin for storage and transfer. The entire system operates under full negative pressure, and the suction force is mainly provided by a pulverized coal fan. The pulverized coal stored in the pulverized coal bin is finally injected into the blast furnace through a spray tank in the pulverized coal injection system.

[0003] Currently, during the process of pulverized coal preparation, the pulverized coal will be used after a period of storage, there is a storage transition period, during which the temperature will drop. After the temperature drops, the internal energy of the pulverized coal particles will decrease, and the molecular thermal motion will weaken, further restricting the flow of the pulverized coal, resulting in fluctuations or interruptions during injection. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a pulverized coal production system and method for a blast furnace, which is used to solve the problem that after the temperature of the pulverized coal drops in the prior art, the internal energy of the pulverized coal particles will decrease, the molecular thermal motion will weaken, further restricting the flow of the pulverized coal, resulting in fluctuations or interruptions during injection.

[0005] To achieve the above purpose and other related purposes, the present invention provides a pulverized coal production system for a blast furnace, including:

[0006] A storage part;

[0007] A coal grinding device, which is connected to the storage part through a conveying component;

[0008] A transfer component, which is connected to the coal grinding device through a first pipeline, and the transfer component is connected to a temperature control component for controlling temperature;

[0009] A spray tank, which is connected to the transfer part through a second pipeline;

[0010] Wherein, a first filter for filtering is provided on the second pipeline.

[0011] Optionally, it further includes a drying mechanism, the drying mechanism is connected to an intake pipeline, and the drying mechanism is connected to the coal grinding device through an air delivery pipeline;

[0012] Wherein, a regulating valve is provided on the intake pipeline, and the regulating valve is electrically connected to a control module.

[0013] Optionally, the first pipeline is provided with a temperature sensing device, and the temperature sensing device is electrically connected to the control module.

[0014] Optionally, the conveying assembly includes a weighing and transporting device and a conveying member. The storage section, the weighing and transporting device, the conveying member, and the coal grinding device are connected in sequence, and the weighing and transporting device is electrically connected to the control module.

[0015] Optionally, the transfer and storage assembly includes a powder collecting device and a pulverized coal bin. The powder collecting device and the pulverized coal bin are connected through a third pipeline. The powder collecting device and the coal grinding device are connected through the first pipeline. The pulverized coal bin and the injection tank are connected through the second pipeline. A second filter element is provided on the third pipeline;

[0016] Among them, the powder collecting device, the pulverized coal bin, and the injection tank are all connected to the temperature control assembly.

[0017] Optionally, a pressure relief port is provided at the top of the pulverized coal bin. The pressure relief port is communicated with the first opening of the pressure relief device. The second opening of the pressure relief device is communicated with an exhaust pipeline. An exhaust fan for pressure relief and dehumidification is provided on the exhaust pipeline.

[0018] Optionally, the temperature control assembly includes a heating pipeline, a first heating branch pipe, a second heating branch pipe, and a third heating branch pipe. The heating pipeline is respectively communicated with the first heating branch pipe, the second heating branch pipe, and the third heating branch pipe. The first heating branch pipe is connected to the powder collecting device. The second heating branch pipe is connected to the pulverized coal bin. The third heating branch pipe is connected to the injection tank.

[0019] Optionally, one end of the first heating branch pipe away from the heating pipeline penetrates the inner wall of the bottom of the powder collecting device. The part of the first heating branch pipe located inside the powder collecting device forms a plurality of continuous S-shaped first bending sections. The plurality of first bending sections are arranged in contact with the inner wall of the powder collecting device, and one end of the first heating branch pipe away from the heating pipeline penetrates the inner wall of the bottom of the powder collecting device;

[0020] One end of the second heating branch pipe away from the heating pipeline penetrates the inner wall of the bottom of the pulverized coal bin. The part of the second heating branch pipe located inside the pulverized coal bin forms a plurality of continuous S-shaped second bending sections. The plurality of second bending sections are arranged in contact with the inner wall of the pulverized coal bin, and one end of the second heating branch pipe away from the heating pipeline penetrates the inner wall of the bottom of the pulverized coal bin;

[0021] One end of the third heating branch pipe away from the heating pipeline penetrates the inner wall of the bottom of the injection tank. The part of the third heating branch pipe located inside the injection tank forms a plurality of continuous S-shaped third bending sections. The plurality of third bending sections are arranged in contact with the inner wall of the injection tank, and one end of the third heating branch pipe away from the heating pipeline penetrates the inner wall of the bottom of the injection tank.

[0022] Optionally, one end of the first heating branch pipe away from the heating pipeline is bent to form a plurality of continuous S-shaped first bending sections. The plurality of continuous first bending sections are arranged in contact with the outer wall of the powder collection device.

[0023] One end of the second heating branch pipe away from the heating pipeline is bent to form a plurality of continuous S-shaped second bending sections. The plurality of continuous second bending sections are arranged in contact with the outer wall of the pulverized coal bin.

[0024] One end of the third heating branch pipe away from the heating pipeline is bent to form a plurality of continuous S-shaped third bending sections. The plurality of continuous third bending sections are arranged in contact with the outer wall of the injection tank.

[0025] The present application also provides a pulverized coal production method for a blast furnace, including:

[0026] Transporting the raw coal in the storage part to the coal grinding device through the conveying assembly for processing into pulverized coal.

[0027] The pulverized coal is transported to the powder collection device through the first pipeline, and the temperature data of the first pipeline is obtained. Based on the temperature data, the opening degree of the regulating valve is adjusted to make the temperature data of the first pipeline consistent with the preset temperature.

[0028] The pulverized coal in the powder collection device is transported to the pulverized coal bin through the third pipeline, and the pulverized coal in the pulverized coal bin is transported to the injection tank through the second pipeline for injection.

[0029] As described above, the beneficial effects brought by the technical solutions in the present invention at least include: a temperature component is provided on the transfer component, and the temperature control component can maintain the temperature of the transfer component, thereby ensuring the constant temperature of the pulverized coal, enhancing the molecular thermal motion of the pulverized coal, enhancing the fluidity of the pulverized coal, and moreover, a first filter element is provided, which can effectively screen out impurities and foreign objects in the pulverized coal, improve the purity of the pulverized coal, avoid blockage of the injection pipeline of the injection tank and impact generated by the high-speed flow of impurities, and extend the service life of the equipment. Description of the Drawings

[0030] Figure 1 It shows a schematic structural diagram of a pulverized coal production system according to an exemplary embodiment of the present invention.

[0031] Description of Part Numbers

[0032] 1. Storage unit; 2. Coal grinding device; 3. Transfer and storage component; 31. Powder collection device; 32. Coal powder bin; 4. Injection tank; 5. Conveying component; 6. First pipeline; 7. Temperature control component; 71. Heating pipeline; 72. First heating branch pipe; 73. Second heating branch pipe; 74. Third heating branch pipe; 8. Second pipeline; 9. First filter element; 10. Drying mechanism; 11. Air inlet pipeline; 12. Gas transmission pipeline; 13. Control valve; 14. Control module; 15. Temperature sensing device; 16. Third pipeline; 17. Pressure relief device; 18. Second filter element. Detailed implementation manners

[0033] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0034] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the layout type of its components may also be more complex.

[0035] In the following description, a large number of details are explored to provide a more thorough explanation of the embodiments of the present disclosure. However, it is obvious to those skilled in the art that the embodiments of the present disclosure can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present disclosure difficult to understand.

[0036] Please refer to Figure 1, the present invention provides a pulverized coal production system for a blast furnace, including a storage section 1, a coal grinding device 2, a transfer assembly 3, and a blowing tank 4. The storage section 1 is used to store the raw coal for blowing. The coal grinding device 2 is connected to the storage section 1 through a conveying assembly 5. The conveying assembly 5 is located at the discharge port of the storage section 1 and transports the raw coal at the discharge port of the storage section 1 to the coal grinding device 2 to be ground into pulverized coal. The transfer assembly 3 is connected to the coal grinding device 2 through a first pipeline 6 to collect and store the pulverized coal produced by the coal grinding device 2. And the transfer assembly 3 is connected to a temperature control assembly 7 for controlling the temperature to timely make up for the heat loss of the pulverized coal during the transition period and increase the conveying temperature of the pulverized coal. The blowing tank 4 is connected to the transfer section through a second pipeline 8 to spray the pulverized coal in the transfer assembly 3 into the blast furnace. Among them, a first filter element 9 for filtering is provided on the second pipeline 8, which can filter impurities in the pulverized coal, improve the purity of the pulverized coal, avoid clogging of the blowing pipeline of the blowing tank 4 and the impact generated by the high-speed flow of impurities, and extend the service life of the equipment.

[0037] Specifically, in an alternative embodiment of the present application, the pulverized coal production system further includes a drying mechanism 10. The drying mechanism 10 is connected to an intake pipeline 11, and the drying mechanism 10 is connected to the coal grinding device 2 through an air delivery pipeline 12. The intake pipeline 11 inputs gas into the drying mechanism 10 for combustion, and the hot gas after combustion enters the coal grinding device 2 through the air delivery pipeline 12 to dry the pulverized coal. Among them, a regulating valve 13 is provided on the intake pipeline 11, and the regulating valve 13 is electrically connected to a control module 14.

[0038] Specifically, in an alternative embodiment of the present application, a temperature sensing device 15 is provided on the first pipeline 6. The temperature sensing device 15 is electrically connected to the control module 14. The temperature sensing device 15 detects the temperature of the pulverized coal in the first pipeline 6. If the detected temperature is lower than the predetermined temperature, the opening degree of the regulating valve 13 is controlled through the control module 14, thereby adjusting the gas input amount in the intake pipeline 11 and regulating the combustion temperature in the drying mechanism 10.

[0039] Specifically, in an alternative embodiment of the present application, the conveying assembly 5 includes a weighing and transporting device and a conveying member. The storage section 1, the weighing and transporting device, the conveying member, and the coal grinding device 2 are connected in sequence. The weighing and transporting device is arranged at the discharge port of the storage section 1. The raw coal is transported onto the weighing and transporting device, and after weighing, it reaches the specified weight and is transported onto the transporting member, and then transported into the coal grinding device 2 through the transporting member for coal grinding. The weighing and transporting device is electrically connected to the control module 14, and the control module 14 sets the specified weight of the weighing and transporting device.

[0040] Specifically, in an alternative embodiment of the present application, the transfer component 3 includes a powder collecting device 31 and a pulverized coal bin 32. The powder collecting device 31 is used to collect pulverized coal from the coal grinding device 2. A suction device (in this embodiment, the suction device is a fan) is also provided on the powder collecting device 31 to generate suction so as to suck the pulverized coal in the coal grinding device 2. The powder collecting device 31 and the pulverized coal bin 32 are connected through a third pipeline 16. The powder collecting device 31 and the coal grinding device 2 are connected through the first pipeline 6. The pulverized coal bin 32 and the injection tank 4 are connected through the second pipeline 8. A second filter element 18 is provided on the third pipeline 16. The second filter element 18 can filter impurities in the pulverized coal, improve the purity of the pulverized coal, avoid blockage of the injection pipeline of the injection tank 4 and the impact generated during the high-speed flow of impurities, and extend the service life of the equipment. Among them, the powder collecting device 31, the pulverized coal bin 32 and the injection tank 4 are all connected to the temperature control component 7.

[0041] Specifically, in an alternative embodiment of the present application, a pressure relief port is provided at the top of the pulverized coal bin 32. The pressure relief port is connected to the first opening of the pressure relief device 17. The second opening of the pressure relief device 17 is connected to the exhaust pipeline. An exhaust fan for pressure relief and dehumidification is provided on the exhaust pipeline to extract the moisture and residual pressure in the pulverized coal bin 32, ensure the dryness of the pulverized coal in the pulverized coal bin 32, and avoid blockage of the second pipeline 8.

[0042] Specifically, in an alternative embodiment of the present application, the temperature control component 7 includes a heating pipeline 71, a first heating branch pipe 72, a second heating branch pipe 73 and a third heating branch pipe 74. The heating pipeline 71 is respectively connected to the first heating branch pipe 72, the second heating branch pipe 73 and the third heating branch pipe 74. The first heating branch pipe 72 is connected to the powder collecting device 31. The second heating branch pipe 73 is connected to the pulverized coal bin 32. The third heating branch pipe 74 is connected to the injection tank 4.

[0043] Specifically, in an alternative embodiment of the present application, the temperature control component 7 is arranged inside the powder collecting device 31, the pulverized coal bin 32 and the injection tank 4, and the heating effect is better. One end of the first heating branch pipe 72 far from the heating pipeline 71 penetrates the inner wall of the bottom of the powder collecting device 31. The part of the first heating branch pipe 72 located inside the powder collecting device 31 forms a plurality of continuous S-shaped first bending sections. The plurality of first bending sections are arranged in contact with the inner wall of the powder collecting device 31, and one end of the first heating branch pipe 72 far from the heating pipeline 71 penetrates out of the inner wall of the bottom of the powder collecting device 31;

[0044] One end of the second heating branch pipe 73 far from the heating pipeline 71 penetrates the inner wall of the bottom of the pulverized coal bin 32. The part of the second heating branch pipe 73 located inside the pulverized coal bin 32 forms a plurality of continuous S-shaped second bending sections. The plurality of second bending sections are arranged in contact with the inner wall of the pulverized coal bin 32, and one end of the second heating branch pipe 73 far from the heating pipeline 71 penetrates the inner wall of the bottom of the pulverized coal bin 32;

[0045] One end of the third heating branch pipe 74 far from the heating pipeline 71 penetrates the inner wall of the bottom of the injection tank 4. The part of the third heating branch pipe 74 located inside the injection tank 4 forms a plurality of continuous S-shaped third bending sections. The plurality of third bending sections are arranged in contact with the inner wall of the injection tank 4, and one end of the third heating branch pipe 74 far from the heating pipeline 71 penetrates the inner wall of the bottom of the injection tank 4;

[0046] Among them, seals are provided at the joints of the powder collecting device 31 and the first heating branch pipe 72 for sealing. Seals are provided at the joints of the pulverized coal bin 32 and the second heating branch pipe 73 for sealing. Seals are provided at the joints of the injection tank 4 and the third heating branch pipe 74 for sealing.

[0047] Specifically, in an alternative embodiment of the present application, the temperature control component 7 is arranged outside the powder collecting device 31, the pulverized coal bin 32 and the injection tank 4, and the sealing effect is better, and there will be no powder leakage. One end of the first heating branch pipe 72 far from the heating pipeline 71 is bent to form a plurality of continuous S-shaped first bending sections, and the plurality of continuous first bending sections are arranged in contact with the outer wall of the powder collecting device 31;

[0048] One end of the second heating branch pipe 73 far from the heating pipeline 71 is bent to form a plurality of continuous S-shaped second bending sections, and the plurality of continuous second bending sections are arranged in contact with the outer wall of the pulverized coal bin 32;

[0049] One end of the third heating branch pipe 74 far from the heating pipeline 71 is bent to form a plurality of continuous S-shaped third bending sections, and the plurality of continuous third bending sections are arranged in contact with the outer wall of the injection tank 4.

[0050] The present application also provides a pulverized coal production method for a blast furnace, including:

[0051] Transporting the raw coal in the storage part 1 to the coal grinding device 2 through the conveying component 5 for processing into pulverized coal;

[0052] The pulverized coal is transported to the powder collecting device 31 through the first pipeline 6, and the temperature data of the first pipeline 6 is obtained. Based on the temperature data, the opening degree of the regulating valve 13 is adjusted to make the temperature data of the first pipeline 6 consistent with the preset temperature;

[0053] The pulverized coal in the powder collection device 31 is transported to the pulverized coal bin 32 through the third pipeline 16, and the pulverized coal in the pulverized coal bin 32 is transported to the injection tank 4 through the second pipeline 8 for injection.

[0054] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A pulverized coal production system for a blast furnace, characterized in that: include: Storage Department; A coal grinding device, wherein the coal grinding device is connected to the storage part via a conveying assembly; A transfer assembly, wherein the transfer assembly is in communication with the coal grinding device via a first pipeline, and the transfer assembly is connected to a temperature control assembly for controlling the temperature; A spray tank, wherein the spray tank is connected to the transfer part through a second pipeline; Wherein, the second pipeline is provided with a first filter element for filtering.

2. A pulverized coal production system for a blast furnace according to claim 1, characterized in that: It also includes a drying mechanism, the drying mechanism is connected to the air intake pipeline, and the drying mechanism is connected to the coal grinding device through a gas transmission pipeline; Wherein, a regulating valve is arranged on the air intake pipeline, and the regulating valve is electrically connected to the control module.

3. A pulverized coal production system for a blast furnace according to claim 2, characterized in that: The first pipeline is provided with a temperature sensor device, and the temperature sensor device is electrically connected to the control module.

4. A pulverized coal production system for a blast furnace according to claim 2, characterized in that: The conveying assembly includes a weighing and conveying device and a conveying member. The storage part, the weighing and conveying device, the conveying member and the coal grinding device are connected in sequence. The weighing and conveying device is electrically connected to the control module.

5. A pulverized coal production system for a blast furnace according to claim 1, characterized in that: The transfer assembly includes a powder collecting device and a pulverized coal bin, the powder collecting device and the pulverized coal bin are connected via a third pipeline, the powder collecting device and the coal grinding device are connected via the first pipeline, the pulverized coal bin and the injection tank are connected via the second pipeline, and a second filter is provided on the third pipeline; Wherein, the powder collecting device, the pulverized coal bin and the spray tank are all connected to the temperature control component.

6. A pulverized coal production system for a blast furnace according to claim 5, characterized in that: A pressure relief port is provided on the top of the pulverized coal bin, the pressure relief port is communicated with the first opening of the pressure relief device, the second opening of the pressure relief device is communicated with the exhaust pipe, and an exhaust fan for pressure relief and dehumidification is provided on the exhaust pipe.

7. A pulverized coal production system for a blast furnace according to claim 5, characterized in that: The temperature control component includes a heating pipeline, a first heating branch, a second heating branch and a third heating branch. The heating pipeline is connected to the first heating branch, the second heating branch and the third heating branch respectively. The first heating branch is connected to the powder collecting device, the second heating branch is connected to the coal powder bin, and the third heating branch is connected to the injection tank.

8. A pulverized coal production system for a blast furnace according to claim 1, characterized in that: One end of the first heating branch pipe away from the heating pipeline penetrates the bottom inner wall of the powder collecting device, the portion of the first heating branch pipe located inside the powder collecting device forms a plurality of continuous S-shaped first curved sections, the plurality of first curved sections are arranged in close contact with the inner wall of the powder collecting device, and one end of the first heating branch pipe away from the heating pipeline passes through the bottom inner wall of the powder collecting device; One end of the second heating branch pipe away from the heating pipeline penetrates the inner wall of the bottom of the pulverized coal bin, the part of the second heating branch pipe located inside the pulverized coal bin forms a plurality of continuous S-shaped second curved sections, the plurality of second curved sections are arranged in close contact with the inner wall of the pulverized coal bin, and one end of the second heating branch pipe away from the heating pipeline passes through the inner wall of the bottom of the pulverized coal bin; One end of the third heating branch pipe away from the heating pipeline penetrates the bottom inner wall of the spray tank, and the part of the third heating branch pipe located inside the spray tank forms a plurality of continuous S-shaped third bending sections, and the plurality of third bending sections are arranged in contact with the inner wall of the spray tank, and one end of the third heating branch pipe away from the heating pipeline passes through the bottom inner wall of the spray tank.

9. A pulverized coal production system for a blast furnace according to claim 5, characterized in that: One end of the first heating branch pipe away from the heating pipeline is bent to form a plurality of continuous S-shaped first bending sections, and the plurality of continuous first bending sections are arranged in close contact with the outer wall of the powder collecting device; One end of the second heating branch pipe away from the heating pipeline is bent to form a plurality of continuous S-shaped second curved sections, and the plurality of continuous second curved sections are arranged in close contact with the outer wall of the pulverized coal bin; The end of the third heating branch pipe away from the heating pipeline is bent to form a plurality of continuous S-shaped third bending sections, and the plurality of continuous third bending sections are arranged in contact with the outer wall of the spray tank.

10. A method for producing pulverized coal for a blast furnace, characterized in that: A pulverized coal production system for a blast furnace as claimed in any one of claims 1 to 9: The raw coal in the storage part is transported to the coal grinding device through the conveying assembly and processed into coal powder; The pulverized coal is transported to the pulverized coal collecting device through the first pipeline, and the temperature data of the first pipeline is obtained, and the opening of the regulating valve is adjusted based on the temperature data so that the temperature data of the first pipeline is consistent with the preset temperature; The coal powder in the powder collecting device is transported to the coal powder bin through the third pipeline, and the coal powder in the coal powder bin is transported to the injection tank through the second pipeline for injection.

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