Coal coke dedusting ash injection device and method

Abstract

The invention relates to a coal coke dedusting ash blowing device and method, and belongs to the technical field of industrial equipment and methods. According to the technical scheme, an ash conveying pipeline (5) is connected with a powder tank car through a powder tank car connecting port (1), a stop valve (2) and a filter (3) are arranged at the front end of the ash conveying pipeline (5), and the rear end of the ash conveying pipeline (5) is connected with a fuel inlet (6). The method has the beneficial effects that the coal coke fly ash is blown into a combustion furnace, a heating furnace or a blast furnace in the form of fuel, so that the utilization efficiency of the coal coke fly ash can be greatly improved, and the problems of environmental pollution and potential safety hazards caused by long-term stacking are avoided.

Description

Technical Field

[0001] The invention relates to a coal char dust removal ash blowing device and method, belonging to the technical field of industrial equipment and methods. Background Art

[0002] The overall utilization rate of char ash by domestic manufacturers is approximately 30% to 50%, primarily due to technological maturity and economic feasibility. The building materials industry (cement and brickmaking) dominates, followed by fuel blending. Metal extraction, due to its high cost, has limited application. Currently, the primary treatment method for char ash in the metallurgical industry is transport and storage or transportation to a stockyard for secondary mixing and blending with other recycled materials. However, due to the fine particle size of char ash, it is prone to drift during transport and storage, causing environmental pollution and wasting resources. Long-term storage also poses safety risks such as spontaneous combustion. Summary of the Invention

[0003] The purpose of the present invention is to provide a coal coke dust ash blowing device and method, which can be used to blow the coal coke dust ash into the combustion furnace, heating furnace or blast furnace in the form of fuel. The implementation is simple, efficient, safe and environmentally friendly. Under the current situation of high operating cost pressure on enterprises, it can be used as an efficient means of comprehensive resource utilization, reduce the production cost of enterprises, greatly improve the utilization efficiency of coal coke dust ash, and avoid environmental pollution and safety hazards caused by long-term stacking, effectively solving the above-mentioned problems existing in the background technology.

[0004] The technical solution of the present invention is: a coal char dust removal ash blowing device, comprising a powder tanker connection port, a shut-off valve, a filter, an ash conveying pipeline and a fuel inlet, the ash conveying pipeline is connected to the powder tanker through the powder tanker connection port, the shut-off valve and the filter are arranged at the front end of the ash conveying pipeline, and the rear end of the ash conveying pipeline is connected to the fuel inlet.

[0005] It also comprises an ash conveying elbow pipe, which is arranged between the filter and the ash conveying pipeline.

[0006] The ash conveying elbow is a thick-walled wear-resistant pipe.

[0007] The fuel inlet is a fuel inlet of a combustion furnace, a heating furnace or a blast furnace.

[0008] There is also a purge pipeline, which is connected to the ash conveying pipeline interface; the purge pipeline is equipped with a shut-off valve, a check valve, a pressure reducing valve and a pressure gauge; the purge medium is matched with the actual situation on site and is one of nitrogen or air. The filter is a perforated plate structure, and the filter aperture matches the particle size of the coal char dust.

[0009] A method for injecting coal char dust removal ash comprises the following steps: (1) Clean the filter and reinstall it, check that the ash conveying pipeline is in good condition; check that the shut-off valve, check valve, pressure reducing valve and pressure gauge on the purge pipeline are in good condition, connect the purge pipeline, open the shut-off valve on the purge pipeline, and purge the ash conveying pipeline with the purge medium; (2) The powder tanker collects the char dust and transports it to the ash delivery site, connects it to the ash delivery pipeline, connects the purge medium to the powder tanker and adjusts the pressure; (3) Communicate with the operators of the combustion furnace, heating furnace or blast furnace to confirm that ash conveying operations can be carried out; (4) Open the shut-off valve on the ash conveying pipeline and use the pressure of the purge medium and the tank truck to adjust the ash conveying speed, and control the amount of coal coke dust removal to no more than 5% of the total fuel amount of the combustion furnace, heating furnace or blast furnace; (5) If ash leakage, abnormal pressure increase or abnormal position control parameters are found during the ash conveying process, cut off the shut-off valve on the ash conveying pipeline immediately and stop ash conveying; (6) After the ash conveying is completed, first close the shut-off valve on the ash conveying pipeline, and then close the shut-off valve 2 on the purge pipeline; (7) During the maintenance of the main production equipment on site, the ash conveying pipeline and its accessories shall be inspected and repaired simultaneously.

[0010] The ash conveying process is in a sealed state throughout and the high pressure is maintained during the ash conveying process, and the coal coke dust removal ash is sprayed into the fuel inlet of the combustion furnace, heating furnace or blast furnace in a fluid state.

[0011] The filter cleaning is determined according to the ash delivery time.

[0012] The beneficial effects of the present invention are: by blowing the coal coke dust ash into the combustion furnace, heating furnace or blast furnace in the form of fuel, the implementation is simple, efficient, safe and environmentally friendly. Under the current situation of high operating cost pressure on enterprises, it can be used as an efficient means of comprehensive resource utilization, reducing the production cost of enterprises, greatly improving the utilization efficiency of coal coke dust ash, and avoiding environmental pollution and safety hazards caused by long-term stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic cross-sectional view of the filter of the present invention; In the figure: powder tanker connection port 1, shut-off valve 2, filter 3, ash conveying elbow 4, ash conveying pipeline 5, fuel inlet 6. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the invention implementation cases clearer, the technical solutions in the invention implementation cases will be clearly and completely described below in conjunction with the drawings in the implementation cases. Obviously, the implementation cases described are only a small part of the implementation cases of the present invention, rather than all the implementation cases. Based on the implementation cases in the present invention, all other implementation cases obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] A coal char dust removal ash blowing device includes a powder tanker connection port 1, a shut-off valve 2, a filter 3, an ash conveying pipeline 5 and a fuel inlet 6. The ash conveying pipeline 5 is connected to the powder tanker through the powder tanker connection port 1, the shut-off valve 2 and the filter 3 are arranged at the front end of the ash conveying pipeline 5, and the rear end of the ash conveying pipeline 5 is connected to the fuel inlet 6.

[0016] It also includes an ash conveying elbow 4, which is arranged between the filter 3 and the ash conveying pipeline 5.

[0017] The ash conveying elbow 4 is a thick-walled wear-resistant pipe.

[0018] The fuel inlet 6 is a fuel inlet of a combustion furnace, a heating furnace or a blast furnace.

[0019] There is also a purge pipeline, which is connected to the ash conveying pipeline interface; the purge pipeline is equipped with a shut-off valve, a check valve, a pressure reducing valve and a pressure gauge; the purge medium is matched with the actual situation on site and is one of nitrogen or air. The filter 3 is a perforated plate structure, and the filter aperture matches the particle size of the coal char dust.

[0020] A method for injecting coal char dust removal ash comprises the following steps: (1) Clean the filter and reinstall it, check that the ash conveying pipeline is in good condition; check that the shut-off valve, check valve, pressure reducing valve and pressure gauge on the purge pipeline are in good condition, connect the purge pipeline, open the shut-off valve on the purge pipeline, and purge the ash conveying pipeline with the purge medium; (2) The powder tanker collects the char dust and transports it to the ash delivery site, connects it to the ash delivery pipeline, connects the purge medium to the powder tanker and adjusts the pressure; (3) Communicate with the operators of the combustion furnace, heating furnace or blast furnace to confirm that ash conveying operations can be carried out; (4) Open the shut-off valve on the ash conveying pipeline and use the pressure of the purge medium and the tank truck to adjust the ash conveying speed, and control the amount of coal coke dust removal to no more than 5% of the total fuel amount of the combustion furnace, heating furnace or blast furnace; (5) If ash leakage, abnormal pressure increase or abnormal position control parameters are found during the ash conveying process, cut off the shut-off valve on the ash conveying pipeline immediately and stop ash conveying; (6) After the ash conveying is completed, first close the shut-off valve on the ash conveying pipeline, and then close the shut-off valve 2 on the purge pipeline; (7) During the maintenance of the main production equipment on site, the ash conveying pipeline and its accessories shall be inspected and repaired simultaneously.

[0021] The ash conveying process is in a sealed state throughout and the high pressure is maintained during the ash conveying process, and the coal coke dust removal ash is sprayed into the fuel inlet of the combustion furnace, heating furnace or blast furnace in a fluid state.

[0022] The filter cleaning is determined according to the ash delivery time.

[0023] In actual applications, the powder tanker is used to collect coal char dust and connect to the ash conveying pipeline. The purge medium can be nitrogen, air and other media according to the actual situation on site, and the purge pipeline is led to the ash conveying pipeline interface site.

[0024] The fuel inlet 6 of the combustion furnace, heating furnace or blast furnace only indicates the destination of the coal coke dust ash added in the form of fuel, and does not mean that it can be directly added to the combustion furnace, heating furnace or blast furnace. It needs to be determined according to the production process of the main equipment.

[0025] The filter 3 is of a perforated plate type, and the pore size of the filter is selected between 5-15 mm according to the particle size of the coal char dust.

[0026] The specific steps are as follows: 1. Clean the filter 3 on the ash conveying pipeline and reinstall it, and check that the ash conveying pipeline 5 is in good condition; check that the shut-off valve 2, check valve, pressure reducing valve, pressure gauge, etc. on the purge pipeline are in good condition (the purge pipeline is installed in the same way as the medium pipeline under normal production conditions of the enterprise, and is not shown separately in the figure), connect the purge pipeline, open the shut-off valve 2 on the purge pipeline, and use the purge medium to purge the ash conveying pipeline.

[0027] 2. After the powder tanker collects the char dust and transports it to the ash delivery site, it is securely connected to the connection port of the powder tanker. Connect the purge medium to the powder tanker and adjust the pressure.

[0028] 3. Communicate with the operators of the combustion furnace, heating furnace or blast furnace to confirm that ash conveying operations can be carried out.

[0029] 4. Open the shut-off valve on the ash conveying pipeline, use the pressure of the purge medium and the tank truck to adjust the ash conveying speed, and control the amount of coal coke dust removal to no more than 5% of the total fuel amount of the combustion furnace, heating furnace or blast furnace.

[0030] 5. If ash leakage, abnormal pressure increase, abnormal position control parameters, etc. are found during the ash conveying process, cut off the shut-off valve on the ash conveying pipeline immediately and stop ash conveying.

[0031] 6. After the ash conveying is completed, first close the shut-off valve on the ash conveying pipeline, and then close the shut-off valve 2 on the purge pipeline.

[0032] 7. During the maintenance of the main production equipment on site, the ash conveying pipelines and accessories shall be inspected and repaired simultaneously.

[0033] The present invention can recycle the generated coal char dust at any time without affecting the normal production of the main equipment. The equipment has a simple and reliable structure, simple operation, and convenient maintenance. The ash conveying process is fully enclosed and does not generate dust. It is both efficient and environmentally friendly and safe.

[0034] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A coal char dust removal ash blowing device, characterized in that: The invention comprises a powder tanker connection port (1), a shut-off valve (2), a filter (3), an ash conveying pipeline (5) and a fuel inlet (6); the ash conveying pipeline (5) is connected to the powder tanker through the powder tanker connection port (1); the shut-off valve (2) and the filter (3) are arranged at the front end of the ash conveying pipeline (5); and the rear end of the ash conveying pipeline (5) is connected to the fuel inlet (6).

2. The char dust blasting device according to claim 1, characterized in that: It also includes an ash conveying elbow (4), which is arranged between the filter (3) and the ash conveying pipeline (5).

3. The char dust injection device according to claim 2, characterized in that: The ash conveying elbow (4) is a thick-walled wear-resistant pipe.

4. The char dust ash injection device according to claim 1, characterized in that: The fuel inlet (6) is a fuel inlet of a combustion furnace, a heating furnace or a blast furnace.

5. The char dust blasting device according to claim 1, characterized in that: A purge pipe is also provided, which leads to the ash conveying pipe interface; a shut-off valve 2, a check valve, a pressure reducing valve and a pressure gauge are provided on the purge pipe; the purge medium matches the actual situation on site and is one of nitrogen or air.

6. The char dust ash injection device according to claim 1, characterized in that: The filter (3) is a perforated plate structure, and the filter aperture matches the particle size of the coal char dust.

7. A method for injecting coal char dust, characterized in that The following steps are involved: (1) Clean the filter and reinstall it, check that the ash conveying pipeline is in good condition; check that the shut-off valve, check valve, pressure reducing valve and pressure gauge on the purge pipeline are in good condition, connect the purge pipeline, open the shut-off valve on the purge pipeline, and purge the ash conveying pipeline with the purge medium; (2) The powder tanker collects the char dust and transports it to the ash delivery site, connects it to the ash delivery pipeline, connects the purge medium to the powder tanker and adjusts the pressure; (3) Communicate with the operators of the combustion furnace, heating furnace or blast furnace to confirm that ash conveying operations can be carried out; (4) Open the shut-off valve on the ash conveying pipeline and use the pressure of the purge medium and the tank truck to adjust the ash conveying speed, and control the amount of coal coke dust removal to no more than 5% of the total fuel amount of the combustion furnace, heating furnace or blast furnace; (5) If ash leakage, abnormal pressure increase or abnormal position control parameters are found during the ash conveying process, cut off the shut-off valve on the ash conveying pipeline immediately and stop ash conveying; (6) After the ash conveying is completed, first close the shut-off valve on the ash conveying pipeline, and then close the shut-off valve 2 on the purge pipeline; (7) During the maintenance of the main production equipment on site, the ash conveying pipeline and its accessories shall be inspected and repaired simultaneously.

8. A method for injecting char dust according to claim 7, characterized in that: The ash conveying process is in a sealed state throughout and the high pressure is maintained during the ash conveying process, and the coal coke dust removal ash is sprayed into the fuel inlet of the combustion furnace, heating furnace or blast furnace in a fluid state.

9. The method for injecting char dust according to claim 7, characterized in that: The filter cleaning is determined according to the ash delivery time.

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