Ash discharging system of blast furnace gas dust remover
By injecting low-temperature inert gas into the ash discharge system of the blast furnace gas dust collector, the temperature of the dust is reduced, the problem of ordinary suction and discharge tank trucks being unusable is solved, and equipment costs are saved.
Patent Information
- Application Number
- CN202422657664.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the existing blast furnace gas dust collector ash discharge system, the dust collection ash temperature is too high, making ordinary suction and discharge tank trucks unusable. It is necessary to purchase high-temperature resistant equipment, which increases costs.
Low-temperature inert gas is used to pass through the ash unloading pipe, ash conveying pipe and discharge pipe, combined with flexible connection devices, to reduce the dust collection ash temperature to a range that ordinary suction and discharge tank trucks can withstand.
The temperature of dust removed is reduced, and ordinary suction and discharge tank trucks can be used, saving the cost of purchasing high-temperature resistant equipment.
Smart Images
Figure CN223397760U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blast furnace smelting, in particular to a blast furnace gas dust collector dust discharge system. Background Art
[0002] Blast furnace top gas contains a large amount of dust and requires purification before it can be delivered to users. Common blast furnace gas dust collectors include gravity dust collectors, cyclone dust collectors, bag dust collectors, Venturi tube scrubbers, and annular gap scrubbers. Gravity dust collectors, cyclone dust collectors, and bag dust collectors are dry-type dust collectors. During normal operation, the dust collected can reach temperatures exceeding 150°C, and in the event of an emergency, the temperature can even reach over 250°C.
[0003] In recent years, to meet environmental protection requirements, many gravity dust collectors, cyclone dust collectors, and bag dust collectors have adopted suction tank trucks for transporting dust from blast furnace gas. The existing system for transporting dust from blast furnace gas using suction tank trucks uses an intermediate tank below the dust collector's ash silo. The dust is discharged from the silo into the intermediate tank, and then from the intermediate tank into the suction tank truck. During this process, the dust temperature can still reach over 150°C.
[0004] Due to factors such as the filter bag material used, conventional suction and drainage tankers can only handle dust temperatures below approximately 100°C. Higher temperatures require high-temperature resistant suction and drainage tankers. Except for blast furnace gas dust, the temperature of all dust transported by suction and drainage tankers in steel mills is below 100°C. Suction and drainage tankers are typically used uniformly throughout the plant. If the temperature of blast furnace gas dust could be lowered to below 100°C, conventional suction and drainage tankers could be used to transport dust throughout the plant, eliminating the need for high-temperature resistant suction and drainage tankers. However, there is no effective solution to this problem within the industry. Utility Model Content
[0005] The purpose of this utility model is to overcome the shortcomings of the above-mentioned background technology and provide a blast furnace gas dust collector ash discharge system, which can address the shortcomings of the existing blast furnace gas dust collector ash discharge technology and reduce the temperature of the blast furnace gas dust ash to below the temperature that ordinary suction and discharge tank trucks can withstand, so that ordinary suction and discharge tank trucks can be used for transportation.
[0006] The utility model provides a blast furnace gas dust collector ash discharge system, comprising a dust collector ash bin, an ash discharge pipe located at the bottom of the dust collector ash bin, and a suction and discharge tank truck. A plurality of ash tanks are provided at the bottom outlet of the ash discharge pipe. The ash tanks are connected to each other through an ash conveying pipe to form an ash conveying pipeline. The suction and discharge tank truck is connected to the ash conveying pipeline through the ash conveying pipeline. A discharge pipe connected to the atmosphere is provided on the top of each ash tank. An air charging pipe connected to a low-temperature inert gas source is provided on the tank body of each ash tank. A blowing pipe connected to a low-temperature inert gas source is connected to each ash conveying pipeline through a tee.
[0007] In the above technical solution, the ash tank includes two ash tanks, a first ash tank and a second ash tank. The bottom outlet of the ash unloading pipe is connected to the first ash tank. The ash conveying pipe connecting the first ash tank and the second ash tank is the first ash conveying pipe. The bottom outlet of the second ash tank is provided with a second ash conveying pipe connected to the suction and discharge tank truck.
[0008] In the above technical solution, the ash unloading pipeline, the first ash conveying pipeline, the second ash conveying pipeline, the inflation pipeline, the auxiliary blowing pipeline and the diffusion pipeline are all provided with flexible connection devices.
[0009] In the above technical solution, the flexible connection device is a metal bellows or a rubber hose.
[0010] In the above technical solution, the ash unloading pipeline is provided with shut-off valves at both ends of the flexible connection device.
[0011] In the above technical solution, two flexible connecting devices are provided on the first ash conveying pipeline, and two shut-off valves are provided on the first ash conveying pipeline, wherein one shut-off valve is located between the first ash tank and a flexible connecting device close to the first ash tank, and the other shut-off valve is located between the second ash tank and the other flexible connecting device.
[0012] In the above technical solution, the second ash conveying pipeline, the inflation pipeline, the blowing-assisting pipeline and the venting pipeline are all provided with shut-off valves.
[0013] In the above technical solution, a filter is provided at the exhaust port at the top of each emission pipe.
[0014] The utility model of the blast furnace gas dust collector dust removal system has the following beneficial effects:
[0015] The utility model discloses an ash discharge system for a blast furnace gas dust collector, which can reduce the temperature of the dust by injecting low-temperature inert gas and dissipating heat to the atmosphere from a discharge pipe. The system can be transported using an ordinary suction and discharge tank truck, eliminating the need to purchase a high-temperature resistant suction and discharge tank truck, thus saving costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a structural diagram of the ash removal system of the blast furnace gas dust collector of the utility model. DETAILED DESCRIPTION
[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but the embodiments should not be construed as limiting the present invention.
[0018] refer to Figure 1 , Figure 1It is a structural schematic diagram of the blast furnace gas dust collector ash discharge system in an embodiment of the utility model. This embodiment provides a blast furnace gas dust collector ash discharge system, including a dust collector ash bin 1, an ash unloading pipe 2, a shut-off valve 3, No. 1 ash tank 5, No. 1 ash conveying pipe 6, No. 2 ash tank 7, No. 2 ash conveying pipe 8, an inflation pipe 9, an auxiliary blowing pipe 10, a discharging pipe 11, and a suction and discharge tank truck 13. The outlet of the dust collector ash bin 1 and the inlet of the No. 1 ash tank 5 are connected via the ash unloading pipe 2. The outlet of the No. 1 ash tank 5 and the inlet of the No. 2 ash tank 7 are connected via the No. 1 ash conveying pipe 6. The outlet of the No. 2 ash tank 7 and the inlet of the suction and discharge tanker 13 are connected via the No. 2 ash conveying pipe 8. The No. 1 ash tank 5 and the No. 2 ash tank 7 are respectively connected to the venting pipe 11. The No. 1 ash tank 5 and the No. 2 ash tank 7 are respectively connected to the inflation pipe 9. The No. 1 ash conveying pipe 6 and the No. 2 ash conveying pipe 8 are respectively connected to the auxiliary blowing pipe 10. The shut-off valve 3 is respectively installed on the ash unloading pipe 2, the No. 1 ash conveying pipe 6, the No. 2 ash conveying pipe 8, the inflation pipe 9, the auxiliary blowing pipe 10, and the venting pipe 11. The gas source of the inflation pipe 9 and the auxiliary blowing pipe 10 is low-temperature inert gas.
[0019] Because the No. 1 ash tank 5 and the No. 2 ash tank 7 are respectively connected to the discharge pipe 11, the high-temperature gas in the No. 1 ash tank 5 and the No. 2 ash tank 7 can be discharged. Because the No. 1 ash tank 5 and the No. 2 ash tank 7 are respectively connected to the inflation pipe 9, and the No. 1 ash conveying pipe 6 and the No. 2 ash conveying pipe 8 are respectively connected to the auxiliary blowing pipe 10, the low-temperature inert gas introduced through the inflation pipe 9 and the auxiliary blowing pipe 10 can reduce the temperature of the high-temperature dust in the No. 1 ash tank 5, the No. 2 ash tank 7, the No. 1 ash conveying pipe 6, and the No. 2 ash conveying pipe 8. This can reduce the temperature of the blast furnace gas dust to below the temperature that ordinary suction and discharge tank trucks can withstand.
[0020] In this embodiment, the low-temperature inert gas is low-temperature nitrogen, and other low-temperature inert gases may also be used. Low temperature means that the temperature is significantly lower than the temperature of the high-temperature dust.
[0021] Preferably, a filter 12 is further installed on the emission pipe 11 to filter dust in the dust-laden gas.
[0022] Preferably, the ash unloading pipeline 2 , the No. 1 ash conveying pipeline 6 , the No. 2 ash conveying pipeline 8 , the inflation pipeline 9 , the auxiliary blowing pipeline 10 , and the dispersing pipeline 11 are also installed with a flexible connecting device 4 .
[0023] Preferably, the flexible connection device 4 is a metal bellows or a rubber hose.
[0024] Preferably, there are two shut-off valves 3 on the ash unloading pipeline 2 .
[0025] Preferably, there are two shut-off valves 3 on the No. 2 ash conveying pipeline 8 .
[0026] Preferably, the filter 12 is a bag filter.
[0027] Preferably, the shut-off valve 3 is a ball valve, a gate valve or a stop valve, and other valves with good sealing performance may also be used.
[0028] Preferably, the shut-off valve 3 is driven manually, pneumatically, electrically or hydraulically.
[0029] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
[0030] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.
Claims
1. A blast furnace gas dust collector ash discharge system, comprising a dust collector ash bin (1), an ash discharge pipe (2) located at the bottom of the dust collector ash bin (1), and a suction and discharge tank car (13), characterized in that: The bottom outlet of the ash unloading pipe (2) is provided with a plurality of ash tanks, and the ash tanks are connected to each other through an ash conveying pipe to form an ash conveying pipeline. The suction and discharge tank truck (13) is connected to the ash conveying pipeline through the ash conveying pipe. The top of each ash tank is provided with a discharge pipe (11) connected to the atmosphere. The tank body of each ash tank is provided with an inflation pipe (9) connected to a low-temperature inert gas source. Each ash conveying pipeline is connected to a blowing pipe (10) connected to a low-temperature inert gas source through a tee.
2. The blast furnace gas dust collector dust removal system according to claim 1, characterized in that: The ash tank comprises a first ash tank (5) and a second ash tank (7), a total of two ash tanks; the bottom outlet of the ash unloading pipe (2) is connected to the first ash tank (5); the ash conveying pipe connecting the first ash tank (5) and the second ash tank (7) is a first ash conveying pipe (6); and the bottom outlet of the second ash tank (7) is provided with a second ash conveying pipe (8) connected to a suction and discharge tank truck (13).
3. The blast furnace gas dust collector dust removal system according to claim 2, characterized in that: The ash unloading pipeline (2), the first ash conveying pipeline (6), the second ash conveying pipeline (8), the inflation pipeline (9), the auxiliary blowing pipeline (10) and the discharging pipeline (11) are all provided with flexible connecting devices (4).
4. The blast furnace gas dust collector dust removal system according to claim 3, characterized in that: The flexible connection device (4) is a metal bellows or a rubber hose.
5. The blast furnace gas dust collector dust removal system according to claim 4, characterized in that: The ash discharge pipeline (2) is provided with cut-off valves (3) at both ends of the flexible connection device (4).
6. The blast furnace gas dust collector dust removal system according to claim 5, characterized in that: Two flexible connection devices (4) are provided on the first ash conveying pipeline (6), and two shut-off valves (3) are provided on the first ash conveying pipeline (6), wherein one shut-off valve (3) is located between the first ash tank (5) and a flexible connection device (4) close to the first ash tank (5), and the other shut-off valve (3) is located between the second ash tank (7) and the other flexible connection device (4).
7. The blast furnace gas dust collector dust removal system according to claim 6, characterized in that: The second ash conveying pipeline (8), the inflation pipeline (9), the blowing-assisting pipeline (10) and the discharging pipeline (11) are all provided with a shut-off valve (3).
8. The blast furnace gas dust collector dust removal system according to claim 7, characterized in that: A filter (12) is provided at the exhaust port at the top of each emission pipe (11).