Coal slime recovery system for coal-containing wastewater

Abstract

The utility model provides a coal slime recovery system for coal-containing wastewater, which comprises a water collecting tank, a partition wall is arranged in the middle of the water collecting tank, the top of the partition wall is an overflow port, the partition wall divides the water collecting tank into a grating well and a recovery tank, the grating well is connected with a drainage ditch and is used for collecting and washing the coal-containing wastewater, and the recovery tank is connected with the drainage ditch. A bucket elevator used for lifting and discharging coal slime deposited in the water collecting pool is arranged in the grating well, supernate in the grating well flows into the recycling pool through an overflow port, and a slurry pump used for pumping out muddy water is arranged in the recycling pool. The coal slime washing device is simple in structure and reasonable in design, muddy water and deposited coal slime can be treated respectively, the bucket elevator is used for lifting, the coal slime in washing waste water is directly lifted to the adjacent coal conveying belt, the recycling rate of the coal slime is increased, and coal loss in the coal washing process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine wastewater treatment, and particularly relates to a coal slime recovery system for coal-containing wastewater. Background Technique

[0002] During the daily operation of buildings such as coal bunkers in coal industry enterprises, a large amount of coal powder, coal particles, etc. will fall to the ground on the coal conveying belt layer. In order to keep the ground clean, the ground needs to be hydraulically washed, and at this time, the coal slime content in the washing wastewater is relatively high. Usually, this part of the washing wastewater is collected into the sump at the bottom layer of the building through the floor drain, and the coal slime deposited in the sump is treated by means of regular manual cleaning.

[0003] When manually cleaning the coal slime, affected by factors such as the cleaning cycle, the scale of the coal preparation plant, and the composition of the coal slime, the coal slime cleaning work is relatively difficult; a large amount of loss is easily caused during the transportation process of the manually cleaned coal slime, the coal slime recovery rate is low, and the scattered coal slime is prone to cause secondary pollution. Content of the Utility Model

[0004] Aiming at the deficiencies of the above-mentioned existing technologies, the utility model provides a coal slime recovery system for coal-containing wastewater, which can separately treat the muddy water and the deposited coal slime, saving time and effort and improving the recovery and utilization rate of coal slime.

[0005] The technical solution provided by the utility model: A coal slime recovery system for coal-containing wastewater, including a collection pool, a partition wall is arranged in the middle of the collection pool, the top of the partition wall is an overflow port, the partition wall divides the collection pool into a grille well and a recovery pool, the grille well is connected to a drainage ditch for collecting the washing coal-containing wastewater, a bucket elevator for lifting and discharging the coal slime deposited in the collection pool is arranged in the grille well, the supernatant in the grille well flows into the recovery pool through the overflow port, and a slurry pump for pumping out the muddy water is arranged in the recovery pool.

[0006] Further, the bucket elevator is arranged along the inclined pool wall on the side of the collection pool away from the recovery pool, and the bucket elevator lifts the deposited coal slime onto the conveyor belt for recovery and treatment.

[0007] Further, a liquid level gauge is arranged in the recovery pool, the liquid level gauge is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the slurry pump, and the opening and closing of the slurry pump are controlled by the liquid level height.

[0008] Further, the outlet of the slurry pump is connected to the coal slime water treatment system through a pipeline.

[0009] The utility model has a simple structure and a reasonable design. It can separately process muddy water and deposited slime, use a bucket elevator for lifting, directly lift the slime in the flushing wastewater to the adjacent coal conveying belt, improve the recovery and utilization rate of slime, and reduce the loss of coal during the coal washing process. By controlling the opening and closing of the slurry pump through the liquid level height of the recovery tank, the coal muddy water can be efficiently transported to the coal slime water treatment system, improving the efficiency of recovery and treatment. The utility model changes the original manual dredging of silt to lifting by a bucket elevator, improving the production efficiency, reducing the labor intensity, and saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is the plan view of the utility model;

[0011] Figure 2 is Figure 1 the sectional view in the direction of 1-1 in

[0012] Figure 3 is Figure 1 the sectional view in the direction of 2-2 in

[0013] In the figure: 1 - partition wall, 2 - overflow port, 3 - grille well, 4 - recovery tank, 5 - drainage ditch, 6 - bucket elevator, 7 - slurry pump, 8 - conveying belt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following further describes the utility model in conjunction with the specific embodiments. Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the utility model. In order to better illustrate the specific embodiments of the utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Based on the specific embodiments of the utility model, all other specific embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the utility model.

[0015] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0016] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0017] As Figures 1-3 shown, a coal slime recovery system for coal-containing wastewater includes a sump. A partition wall 1 is provided in the middle of the sump. The top of the partition wall 1 is an overflow port 2. The partition wall 1 divides the sump into a grille well 3 and a recovery pool 4. The grille well 3 is connected to a drainage ditch 5 for collecting the flushing coal-containing wastewater. A bucket elevator 6 for lifting and discharging the coal slime deposited in the sump is provided in the grille well 3. The supernatant in the grille well 3 flows into the recovery pool 4 through the overflow port 2. A slurry pump 7 for pumping out the muddy water is provided in the recovery pool 4.

[0018] The bucket elevator 6 is arranged along the inclined pool wall on the side of the sump away from the recovery pool. The bucket elevator 6 lifts the deposited coal slime to a conveyor belt 8 for recovery treatment.

[0019] A liquid level gauge is provided in the recovery pool 4. The liquid level gauge is electrically connected to the input end of a controller. The output end of the controller is electrically connected to the slurry pump 7. The opening and closing of the slurry pump 7 are controlled by the liquid level height. The outlet of the slurry pump 7 is connected to a coal slime water treatment system through a pipeline.

[0020] In places such as coal bunkers and transfer points in coal preparation plants, the ground needs to be hydraulically flushed. At this time, the coal slime content in the flushing wastewater generated is relatively high. This part of the flushing wastewater is collected through floor drains into the drainage ditch and sent to the sump at the bottom floor of the building through the drainage ditch. After being filtered by the grille, the supernatant flows into the recovery pool through the overflow port. The opening and closing of the slurry pump are controlled by setting the pump start water level and pump stop water level. The precipitated coal slime water is transported to the thickening workshop or the coal slime water treatment system for reuse. The coal slime deposited at the bottom of the grille well is lifted to the conveyor belt by the bucket elevator and then undergoes subsequent recovery treatment.

[0021] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A coal slime recovery system for coal-containing wastewater, comprising a water collection tank, characterized in that: A partition wall (1) is provided in the middle of the water collection tank, the top of the partition wall (1) is an overflow port (2), and the partition wall (1) divides the water collection tank into a grid well (3) and a recovery tank (4). The grid well (3) is connected to a drainage ditch (5) and is used to collect and flush coal-containing wastewater. A bucket elevator (6) is provided in the grid well (3) for lifting and discharging coal sludge deposited in the water collection tank. The supernatant in the grid well (3) flows into the recovery tank (4) through the overflow port (2), and a slurry pump (7) is provided in the recovery tank (4) for pumping out the sludge.

2. A coal slime recovery system for coal-containing wastewater according to claim 1, characterized in that: The bucket elevator (6) is arranged along the inclined pool wall of the water collecting pool away from the recovery pool. The bucket elevator (6) lifts the deposited coal slime to the conveyor belt (8) for recovery.

3. The coal slime recovery system for coal-containing wastewater according to claim 1, characterized in that: A liquid level meter is provided in the recovery pool (4), the liquid level meter is electrically connected to the input end of the controller, the output end of the controller is electrically connected to the slurry pump (7), and the start and stop of the slurry pump (7) is controlled by the liquid level height.

4. The coal slime recovery system for coal-containing wastewater according to claim 1, characterized in that: The outlet of the slurry pump (7) is connected to the coal slurry water treatment system through a pipeline.

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