Equipment for industrial kiln tail flue gas carbonized product

Abstract

The invention relates to equipment for industrial kiln tail flue gas carbonized products, which comprises a carbonization kettle and a gas control system, the carbonization kettle comprises a kettle body, a kettle head kettle door and a kettle tail kettle door, and the kettle body is provided with a hygrothermograph, a barometer, a gas inlet and a gas outlet. The gas control system comprises a kiln tail flue gas conveying pipeline, an exhaust fan, a vacuum pump and an air blower, the exhaust fan, the vacuum pump and the air blower are arranged on the kiln tail flue gas conveying pipeline, the conveying pipeline is connected with an air inlet of the kettle body, an air duct with uniform small holes is arranged in the kettle body, and the air duct is connected with the air inlet. The characteristics of the kiln tail flue gas are fully considered, on the premise that normal-pressure carbonization can be guaranteed, pressurizing carbonization can be conducted on some products, and the special equipment can improve production convenience and production efficiency and guarantee the physical health safety of production personnel and the safety of the equipment.

Description

Technical Field

[0001] The invention relates to cement product production equipment, and more particularly to equipment for carbonizing products from industrial kiln tail flue gas. Background Art

[0002] With the development and application of carbon dioxide capture, utilization and storage (CCUS) in the field of building materials, more and more carbonized products have appeared in the field of building materials, such as carbonized aerated blocks, carbonized plates, carbonized stones, etc. However, there is a lack of equipment for preparing carbonized products, and there is no mature carbonization equipment. Patent CN117101562A provides a special carbonization kettle for carbonized products, but the technology provided is more suitable for experimental carbonization. At present, there is a lack of equipment for the industrial production of carbonized products from kiln tail flue gas. In addition to fully considering the key factors affecting the performance of carbonized products: temperature, humidity, carbon concentration, carbon pressure, atmosphere uniformity, etc., different For experimental equipment, the difficulties to be solved in the use of kiln tail flue gas for industrial production are: 1. The kiln tail flue gas contains a large amount of acidic components. When carbonized products are produced industrially, the kiln tail flue gas is highly corrosive and destructive to facilities such as pipelines, carbonization kettles, and air compressors; 2. The kiln tail flue gas is at normal pressure, and when carbonizing products, a certain air pressure is often required to ensure the carbonization effect and strength of the products, such as the carbonized products involved in patent CN113956000B and patent CN113956070B; 3. Equipment for industrial production must take into account production convenience, production efficiency, ensuring the health and safety of production personnel, and ensuring equipment safety. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a device for carbonizing products from industrial kiln tail flue gas, which can achieve the purpose of stabilizing the industrial production of carbonized products from cement kiln tail flue gas.

[0004] The technical solution adopted by the present invention to solve its technical problems is: constructing a device for carbonizing products from industrial kiln tail flue gas, including a carbonization kettle and a gas control system, the carbonization kettle including a kettle body, a kettle head kettle door and a kettle tail kettle door, the kettle body is provided with a thermometer and hygrometer, a barometer, an air inlet and an air outlet, the gas control system includes a kiln tail flue gas conveying pipeline and an exhaust fan, a vacuum pump and a blower arranged on the kiln tail flue gas conveying pipeline, the conveying pipeline is connected to the air inlet of the kettle body, a ventilation pipeline with uniform small holes is provided inside the kettle body, and the ventilation pipeline is connected to the air inlet.

[0005] According to the above scheme, the gas control system also includes a pressure pump and a gas storage tank. The inlet of the pressure pump is arranged between the exhaust fan and the vacuum pump, and the outlet of the pressure pump is connected to the gas storage tank. The outlet of the gas storage tank is provided with a gas storage tank valve and a pressure reducing valve, and the pressure reducing valve is connected to the air inlet of the kettle body.

[0006] According to the above solution, a booster pump valve is provided at the inlet of the booster pump.

[0007] According to the above scheme, the vacuum pump is provided with a vacuum pump valve, and the blower is provided with a blower valve.

[0008] According to the above solution, a conveying pipeline valve is provided at the front end of the exhaust fan.

[0009] According to the above scheme, the conveying pipeline is slowly inclined downward according to the conveying direction of the kiln tail smoke, and a condensate collection box is provided at the bottom of the conveying pipeline.

[0010] According to the above solution, the outside of the delivery pipeline is coated with thermal insulation material.

[0011] According to the above scheme, the vacuum pump is provided with a circulating water cooling system.

[0012] According to the above solution, the ventilation pipe is a stainless steel pipe.

[0013] According to the above scheme, the kiln tail flue gas conveying pipeline is a composite stainless steel pipeline.

[0014] The equipment for carbonizing products from industrial kiln tail flue gas according to the present invention has the following beneficial effects:

[0015] The present invention fully considers the characteristics of kiln tail flue gas: high moisture content, acidity, and condensed water generated by temperature changes. Combined with the actual industrial production, effective solutions are proposed for the rust damage of equipment and facilities, the treatment of condensed water in kiln tail flue gas, and the occupational health and safety of operators. Under the premise of ensuring carbonization at normal pressure, pressurized carbonization can also be performed for certain products. The special equipment provided by the present invention can improve production convenience and production efficiency, ensure the health and safety of production personnel, and ensure the safety of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0017] Figure 1 It is a schematic diagram of the structure of the equipment used for carbonizing products from industrial kiln tail flue gas according to the present invention;

[0018] Figure 2 is a simplified flow chart of a gas control system. DETAILED DESCRIPTION

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0020] like Figure 1-2As shown, the equipment for carbonizing products using industrial kiln tail flue gas provided by the present invention comprises a carbonization kettle and a gas control system, wherein the carbonization kettle comprises a kettle body, a kettle head kettle door 1 and a kettle tail kettle door 2.

[0021] The two kettle doors, kettle door 1 at the head and kettle door 2 at the tail, are located in the carbonized product exit area and molding entry area respectively. The zoning setting is more conducive to production arrangement and can improve production efficiency. The kettle doors open and close up and can be opened and closed by an automatic control system. The kettle doors and the kettle body have a sealing structure. A ventilation pipe with uniform small holes is provided at the middle height of the carbonization kettle, that is, a stainless steel pipe 8 connected to the air inlet 7 of the kettle body. The stainless steel pipe 8 can effectively disperse the flue gas at the tail of the kiln. A valve 24 is provided at the air outlet 9 on the kettle body. The kettle body is provided with thermometers and hygrometers 3, 4, and 5 to detect the temperature and humidity at the head, middle and tail of the kettle respectively, so as to detect the carbonization environment in the kettle. A barometer 6 is provided on the kettle body, and all instruments can be connected to the central control for centralized display.

[0022] A stainless steel pipe 8 with uniform small holes is provided on both sides of the front and rear at the middle height position inside the kettle body. The pipe 8 is connected to the air inlet 7. The flue gas from the kiln tail enters the kettle through the small holes on the stainless steel pipe 8 to ensure that the gas environment inside the kettle body is uniform.

[0023] The gas outlet 9 is connected to the exhaust chimney to facilitate the exhaust of the kiln tail smoke according to regulations.

[0024] The delivery pipeline 10 of the gas control system is made of composite stainless steel pipe, with stainless steel inside and carbon steel outside. The outside of the pipeline is covered with insulation material to reduce the temperature loss and condensed water generation during the fume transportation process at the kiln tail. The delivery pipeline 10 is laid from the kiln tail to the carbonization kettle, and the pipeline is slowly tilted and lowered to avoid the deposition of condensed water during the fume transportation process. A condensed water sedimentation collection box 11 is set at the lowest point close to the carbonization kettle for discharging condensed water. Condensed water and pipeline rust can be smoothly settled in the condensed water collection box 11, extending the service life of the delivery pipeline valve 17 and the exhaust fan 12. When carbonization is not performed, the delivery pipeline valve 17 is closed to avoid the exhaust fan 12 being exposed to the fume at the kiln tail for a long time.

[0025] The condensate collection box 11 is airtight to prevent the kiln tail smoke from leaking out.

[0026] The exhaust fan 12 is located behind the valve 17 of the conveying pipeline, and its function is to provide negative pressure in the pipeline to extract the flue gas from the kiln tail.

[0027] The pressure pump 13 is located behind the exhaust fan 12 and is connected to the gas storage tank 14 . The function of the pressure pump 13 is to pressurize the kiln tail flue gas and store it in the gas storage tank 14 .

[0028] The gas storage tank 14 is a high-pressure gas storage tank, which is connected to the air inlet 7 of the kettle body, and a pressure reducing valve 23 is provided in the middle to pressurize the kiln tail flue gas in the kettle to the pressure required for carbonized products.

[0029] The vacuum pump 15 is located behind the booster pump 13 and is used to extract the air in the kettle to provide kiln tail flue gas with sufficient purity for the initial carbonization of the carbonized products. The vacuum pump 15 is equipped with a circulating water cooling system to prevent the vacuum pump 15 from overloading due to long-term operation.

[0030] The blower 16 is located behind the vacuum pump 15, and is used to quickly discharge the remaining kiln tail flue gas in the kettle after carbonization is completed, so as to avoid the residual kiln tail flue gas after opening the kettle from causing harm to the operators and on-site facilities, facilitate quick one-step operation, and improve production efficiency. At the same time, the blower 16 also has the function of reducing the humidity in the kettle, reducing the generation of condensed water when the kiln tail flue gas enters the kettle, thereby reducing the risk of the dripping of condensed water affecting the local moisture content of the carbonized products in the kettle, and ensuring the uniformity and stability of the carbonized products.

[0031] The inlet of the booster pump 13 is provided with a booster pump valve 19 , the vacuum pump 15 is provided with a vacuum pump valve 20 , and the blower 16 is provided with a blower valve 21 .

[0032] Open valves 17 and 19, close valves 18 and 22, turn on the exhaust fan 12 and the booster pump 13, and store gas in the high-pressure gas storage tank 14. Close all valves and the kettle door, open valve 20, and turn on the vacuum pump 15 to extract the air in the carbonization kettle to the required vacuum pressure. Close all valves, open valve 22, and use the pressure reducing valve 23 to control the kiln tail flue gas in the high-pressure gas storage tank to enter the carbonization kettle and reach the required air pressure. After the carbonization is completed, open valve 24. If only atmospheric pressure carbonization is required, after the vacuum is exhausted, open the outlet valve 24, open valve 21, and turn on the blower 16 to discharge the kiln tail flue gas in the carbonization kettle to prevent the kiln tail flue gas from entering the production workshop to ensure the safety of personnel and equipment. Open the kettle door and take out the carbonized products.

[0033] According to the product characteristics of the carbonized product, the equipment provided by the present invention can also be carbonized at normal pressure. After the vacuum is drawn, all valves are closed, valves 17 and 18 are opened, and the exhaust fan 12 is turned on, and the flue gas from the kiln tail enters the carbonization kettle. The amount of flue gas from the kiln tail in the normal pressure carbonization kettle is small and the carbonization efficiency is low. The valve 24 can be partially opened to allow the flue gas from the kiln tail to circulate in the carbonization kettle to improve the carbonization efficiency.

[0034] The special equipment for carbonizing products from industrial kiln tail flue gas provided by the present invention has the following steps for carbonizing kiln tail flue gas under pressure:

[0035] 1) Put the formed carbonized product body into the kettle, close the kettle door, close all valves, open valve 20, start the vacuum pump 15, evacuate to the set pressure, turn off the vacuum pump 15, and close the valve 20;

[0036] 2) Open valve 22 and use pressure reducing valve 23 to control the flue gas pressure at the kiln tail in the carbonizing kettle to a set value;

[0037] 3) After maintaining the pressure for the time required for carbonization, close valve 22 and pressure reducing valve 23.

[0038] 4) Open the gas outlet valve 24, open the valve 21, start the blower 16, discharge the flue gas from the carbonization kettle, close all valves, open the kettle door, and take out the carbonized product.

[0039] The steps for carbonizing kiln tail gas at normal pressure are as follows:

[0040] 1) Put the formed carbonized product body into the kettle, close the kettle door, close all valves, open valve 20, start the vacuum pump 15, evacuate to the set pressure, turn off the vacuum pump 15, and close the valve 20;

[0041] 2) Open valves 17 and 18, start exhaust fan 12, and allow the flue gas from the kiln tail to enter the carbonizing kettle. If gas circulation in the carbonizing kettle is required, partially open valve 24;

[0042] 3) After carbonization reaches the required time, close the exhaust fan 12 and valves 17 and 18.

[0043] 4) Open valve 21, start blower 16, discharge the flue gas from the carbonization kettle, close all valves, open the kettle door, and take out the carbonized product.

[0044] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A device for carbonizing products from industrial kiln tail gas, characterized in that: It includes a carbonization kettle and a gas control system. The carbonization kettle includes a kettle body, a kettle head kettle door and a kettle tail kettle door. The kettle body is provided with a thermometer and hygrometer, a barometer, an air inlet and an air outlet. The gas control system includes a kiln tail fume conveying pipeline and an exhaust fan, a vacuum pump and a blower arranged on the kiln tail fume conveying pipeline. The conveying pipeline is connected to the air inlet of the kettle body. A ventilation pipeline with uniform small holes is provided inside the kettle body, and the ventilation pipeline is connected to the air inlet.

2. The equipment for carbonizing products from industrial kiln tail gas according to claim 1, characterized in that: The gas control system also includes a pressure pump and a gas tank. The inlet of the pressure pump is arranged between the exhaust fan and the vacuum pump. The outlet of the pressure pump is connected to the gas tank. The outlet of the gas tank is provided with a gas tank valve and a pressure reducing valve. The pressure reducing valve is connected to the air inlet of the kettle body.

3. The equipment for carbonizing products from industrial kiln tail flue gas according to claim 2, characterized in that: The inlet of the booster pump is provided with a booster pump valve.

4. The equipment for carbonizing products from industrial kiln tail gas according to claim 1, characterized in that: The vacuum pump is provided with a vacuum pump valve, and the blower is provided with a blower valve.

5. The equipment for carbonizing products from industrial kiln tail gas according to claim 1, characterized in that: A conveying pipeline valve is arranged at the front end of the exhaust fan.

6. The equipment for carbonizing products from industrial kiln tail gas according to claim 1, characterized in that: The conveying pipeline is slowly inclined downward according to the conveying direction of the kiln tail smoke, and a condensed water collection box is provided at the bottom of the conveying pipeline.

7. The equipment for carbonizing products from industrial kiln tail gas according to claim 1, characterized in that: The outside of the conveying pipeline is coated with heat-insulating material.

8. The equipment for carbonizing products from industrial kiln tail gas according to claim 1, characterized in that: The vacuum pump is provided with a circulating water cooling system.

9. The equipment for carbonizing products from industrial kiln tail gas according to claim 1, characterized in that: The ventilation pipe is a stainless steel pipe.

10. The equipment for carbonizing products from industrial kiln tail gas according to claim 1, characterized in that: The kiln tail smoke conveying pipeline is a composite stainless steel pipeline.

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