Dust fall system for flat ground type red mud storage yard adopting filter cake biscuit method and use method of dust fall system

Abstract

The invention discloses a dust falling system for a flat ground type red mud storage yard through a filter cake method and a using method.The dust falling system comprises the red mud storage yard, nozzles, valves, a water conveying main pipe, water conveying branch pipes, a water drainage vertical shaft, a water drainage pipe, a clarification tank, a water return tank, a lifting pump and a partition dam, the red mud storage yard is high in the periphery and low in the middle, and dam bodies are arranged on the periphery of the red mud storage yard; the clarification tank and the water return tank are arranged outside the red mud pile yard, the partition dam is arranged between the clarification tank and the water return tank and provided with an overflow port so that the clarification tank can be communicated with the water return tank, the lifting pump is installed in the water return tank and connected with the water delivery main pipe, the water delivery branch pipes are connected with the water delivery main pipe, and the spray heads and the valves are installed on the water delivery branch pipes. The drainage vertical shaft is arranged in the red mud storage yard and is lower than a dam body around the red mud storage yard, the drainage vertical shaft is communicated with the clarification tank through a drainage pipe, and the drainage pipe slopes towards the clarification tank. The device is simple in structure, dust falling is achieved through spraying of the nozzles, and water is recycled through the drainage vertical shaft and the drainage pipe.

Description

Technical Field

[0001] The invention relates to the field of dust reduction systems, in particular to a dust reduction system for a flat-land red mud dump using a filter cake method and a use method thereof. Background Art

[0002] At present, most of the red mud in domestic alumina plants are stored by the filter cake method. The red mud slurry is filtered by a filter to form a filter cake with a moisture content less than the liquid limit, and then the filter cake is transported to the red mud dump by a belt conveyor or a car, and spread, dried and rolled in the dump. The main components of red mud particles are powder particles and clay particles. During the storage process of red mud, especially when drying and rolling, due to dry weather and windy weather, the dust on the surface of the red mud dump is blown to the surrounding area of ​​the dump with the help of strong wind, causing pollution to the surrounding environment. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a dust reduction system and use method for a filter cake method flat-land red mud dump, which aims to solve the problem of red mud dust generated during the storage process of red mud, achieve effective dust reduction and reduce the consumption of clean water in the plant area.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a dust reduction system for a flat-land red mud dump using a filter cake method, the dust reduction system comprising a red mud dump, a nozzle, a valve, a water supply main pipe, a water supply branch pipe, a drainage shaft, a drainage pipe, a clarifier, a return water tank, a lifting pump and a dividing dam. The red mud dump is high on the four sides and low in the middle, and the red mud dump is surrounded by a dam body. The clarifier and the return water tank are arranged outside the red mud dump. The dividing dam is arranged between the clarifier and the return water tank and is provided with an overflow port to connect the clarifier and the return water tank. The lifting pump is installed in the return water tank and connected to the water supply main pipe. There are several water supply branches and they are connected to the water supply main pipe. The nozzle and the valve are installed on the water supply branch pipe. The drainage shaft is arranged in the red mud dump and is lower than the dam body around the red mud dump. The drainage shaft is connected to the clarifier through a drainage pipe, and the drainage pipe slopes toward the clarifier.

[0005] The water delivery main pipe is provided with an annular section and is arranged around the dam body, and the water delivery branch pipe is connected to the annular section of the water delivery main pipe.

[0006] The diameter of the water supply main pipe is DN150, and the diameter of the water supply branch pipe is DN15.

[0007] The vertical shaft for flood discharge and the drainage pipe are reinforced concrete structures. The diameter of the vertical shaft for flood discharge is 3.0m, and the diameter of the drainage pipe is 2.0m.

[0008] The nozzle is a spray type nozzle.

[0009] The lifting pump is an alkali corrosion resistant submersible pump.

[0010] A method for using a dust reduction system for a flat-land red mud dump using a filter biscuit method comprises the following steps: S1, using a lift pump to pump the collected water back into the water tank; S2, transporting water to the sprinkler through the water main pipe and the water branch pipe, and the sprinkler sprays water on the surface of the red mud dump, and adjusting the valve to control the spraying area and spraying time; S3. Excess spray water enters the drainage shaft from the surface of the red mud dump, flows back to the clarification tank along the drainage pipe, and after being clarified in the clarification tank, the dividing dam is opened to flow into the return water tank.

[0011] Beneficial effects of the present invention: The dust reduction system designed for the flat-ground red mud dump based on the filter cake method of the present invention has a simple structure, and can effectively solve the problem of red mud dust in the red mud dump by spraying dust reduction with a nozzle. At the same time, through the drainage shaft and the drainage pipe, the excess spray water enters the drainage shaft along the surface of the dump, and flows into the clarification tank along the drainage pipe, and flows into the return water tank after clarification in the clarification tank, so as to absorb water and spray again to reach the circulating water, thereby reducing the consumption of clean water in the plant area. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a plan view schematic diagram of the present invention; In the figure: 1. Nozzle; 2. Valve; 3. Water supply main pipe; 4. Water supply branch pipe; 5. Drainage shaft; 6. Drainage pipe; 7. Clarifying tank; 8. Return water tank; 9. Lifting pump; 10. Dividing dam. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments. Example

[0015] like Figure 1 to Figure 2As shown, the present invention provides a dust reduction system for a filter cake method flat-land type red mud dump, the dust reduction system comprises a red mud dump, a nozzle 1, a valve 2, a water supply main pipe 3, a water supply branch pipe 4, a drainage shaft 5, a drainage pipe 6, a clarifier 7, a return water tank 8, a lifting pump 9 and a dividing dam 10. The red mud dump is high on the four sides and low in the middle, and the red mud dump is surrounded by a dam body. The clarifier 7 and the return water tank 8 are arranged outside the red mud dump. The dividing dam 10 is arranged between the clarifier 7 and the return water tank 8 and is provided with an overflow port to connect the clarifier 7 and the return water tank 8. The lifting pump 9 is installed in the return water tank 8 and connected to the water supply main pipe 3. The water supply branch pipe 4 is a plurality of branches and connected to the water supply main pipe 3. The nozzle 1 and the valve 2 are installed on the water supply branch pipe 4. The drainage shaft 5 is arranged in the red mud dump and is lower than the dam body around the red mud dump. The drainage shaft 5 is connected to the clarifier 7 through the drainage pipe 6, and the drainage pipe 6 slopes toward the clarifier 7.

[0016] Specifically, the water main pipe 3 is provided with an annular section and is arranged around the dam body, the water branch pipe 4 is connected to the annular section of the water main pipe 3, the diameter of the water main pipe 3 is DN150, and the diameter of the water branch pipe 4 is DN15. The flood discharge shaft 5 and the drainage pipe 6 are reinforced concrete structures, the diameter of the flood discharge shaft 5 is 3.0m, and the diameter of the drainage pipe 6 is 2.0m. The nozzle 1 is a spray nozzle, and the lifting pump 9 is an alkali corrosion resistant submersible pump.

[0017] The dust reduction system collects water in the water return pool 8 by means of a lifting pump 9, and delivers the water to the annular section of the water supply main pipe 3 on the top of the dam body through the water supply main pipe 3, and sprays water through the nozzle 1 on the water supply branch pipe 4 to ensure that the surface of the red mud has a certain humidity. The use of a spray-type nozzle can achieve low water consumption and uniform water spraying; in order to avoid excessive spraying, the valve 2 can be adjusted to control the spraying area and spraying time.

[0018] The method for using the dust reduction system of the filter cake method flat-land red mud dump specifically comprises the following steps: S1, using the lifting pump 9 to extract the collected water in the water tank 8; S2, water is transported to the sprinkler 1 through the water main pipe 3 and the water branch pipe 4, and the sprinkler 1 sprays water on the surface of the red mud dump, and the valve 2 is adjusted to control the spraying area and spraying time; S3, the excess spray water enters the drainage shaft 5 from the surface of the red mud dump, flows back to the clarification tank 7 along the drainage pipe 6, and after being clarified in the clarification tank 7, the dividing dam 10 is opened to flow into the return water tank 8.

[0019] Through the above method, recycled water is achieved, saving the plant's capacity to provide new water.

[0020] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A dust suppression system for a flat-land red mud dump using a filter cake method, characterized in that: The dust suppression system comprises a red mud dump, a nozzle (1), a valve (2), a water main pipe (3), a water branch pipe (4), a drainage shaft (5), a drainage pipe (6), a clarifier (7), a return water tank (8), a lifting pump (9) and a separation dam (10). The red mud dump is high on the periphery and low in the middle. The red mud dump is surrounded by a dam body. The clarifier (7) and the return water tank (8) are arranged outside the red mud dump. The separation dam (10) is arranged between the clarifier (7) and the return water tank (8) and is provided with an overflow port so that The clarification tank (7) is connected to the return water tank (8), the lifting pump (9) is installed in the return water tank (8) and connected to the water supply main pipe (3), the water supply branch pipes (4) are multiple and connected to the water supply main pipe (3), the nozzle (1) and the valve (2) are installed on the water supply branch pipe (4), the drainage shaft (5) is arranged in the red mud dump and is lower than the dam body around the red mud dump, the drainage shaft (5) is connected to the clarification tank (7) through the drainage pipe (6), and the drainage pipe (6) slopes toward the clarification tank (7).

2. The dust reduction system for a flat-land red mud dump using a filter cake method according to claim 1, characterized in that: The water delivery main pipe (3) is provided with an annular section and is arranged around the dam body, and the water delivery branch pipe (4) is connected to the annular section of the water delivery main pipe (3).

3. The dust reduction system for a flat-land red mud dump using a filter cake method according to claim 1, characterized in that: The diameter of the water supply main pipe (3) is DN150, and the diameter of the water supply branch pipe (4) is DN15.

4. The dust suppression system for a flat-land red mud dump using a filter cake method according to claim 1, characterized in that: The vertical flood discharge shaft (5) and the drainage pipe (6) are reinforced concrete structures; the diameter of the vertical flood discharge shaft (5) is 3.0 m, and the diameter of the drainage pipe (6) is 2.0 m.

5. The dust reduction system for a flat-land red mud dump using a filter cake method according to claim 1, characterized in that: The nozzle (1) is a spray type nozzle.

6. The dust suppression system for a flat-land red mud dump using a filter cake method according to claim 1, characterized in that: The lifting pump (9) is an alkali corrosion-resistant submersible pump.

7. A method for using the dust reduction system of the filter cake method flat-land type red mud dump as claimed in any one of claims 1 to 6, characterized in that: The specific steps include: S1, using a lift pump (9) to extract the collected water in the return water tank (8); S2, transporting water to the sprinkler (1) through the water main pipe (3) and the water branch pipe (4), and the sprinkler (1) sprays water on the surface of the red mud dump, and adjusting the valve (2) to control the spraying area and spraying time; S3, the excess spray water enters the drainage shaft (5) from the surface of the red mud dump, flows back to the clarification tank (7) along the drainage pipe (6), and after being clarified in the clarification tank (7), the dividing dam (10) is opened to flow into the return water tank (8).

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