A short-process underground coal mine wastewater treatment system
By combining magnetic coagulation sedimentation and filter cloth filter systems, the problems of high energy consumption and large land area in mine water treatment are solved, realizing efficient treatment and stable reuse of underground coal mine wastewater, and reducing energy consumption and land area.
Patent Information
- Application Number
- CN202521790504.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-22
AI Technical Summary
Existing mine water treatment methods suffer from high energy consumption, large land area requirements, and complex facilities, especially during underground reuse, leading to resource waste and increased costs.
The system combines a magnetic coagulation sedimentation system with a filter cloth filter system, including a coagulation reaction tank, a sedimentation tank, a magnetic recovery machine, and a fiber disc filter, to achieve efficient removal of suspended solids and reduce the SS content in the water to 5 mg/L. The system is installed underground to reduce the need for intermediate water tanks and secondary lifting.
It achieves efficient treatment of underground coal mine wastewater with less land area and low cost, the water quality meets the standards for underground reuse, the system operates stably, has low energy consumption, and a short process.
Smart Images
Figure CN224677875U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a short-process underground coal mine wastewater treatment system. Background Technology
[0002] When mine water flows through the working face, it carries in a large amount of suspended matter such as coal dust and rock particles, causing the mine water to be turbid, with obvious color, mostly black and yellowish-brown, and poor sensory properties.
[0003] Coal mining generates a large amount of mine wastewater. Currently, most mine water treatment in my country involves temporary underground storage followed by pumping to a surface treatment plant for further processing, and then pumping it back underground for reuse. This treatment method suffers from high energy consumption due to the secondary pumping of mine water, and its structural design requires more tanks, resulting in a large footprint for the entire facility. Utility Model Content
[0004] To address the problems existing in current mine water treatment methods, this invention provides a short-process underground coal mine wastewater treatment system. This invention can treat coal mine wastewater with a smaller footprint and lower cost, reducing suspended solids in the effluent to 5 mg / L. The treated water that meets the requirements can be directly reused underground.
[0005] The technical solution of this utility model is as follows: A short-process underground coal mine wastewater treatment system includes an equalization tank, an equalization tank lift pump, a magnetic coagulation sedimentation system, a filter cloth filter system, a clear water tank, and a reuse pump. The equalization tank is equipped with a wastewater inlet, and its outlet is connected to the equalization tank lift pump. The outlet of the equalization tank lift pump is connected to the inlet of the magnetic coagulation sedimentation system. The outlet of the magnetic coagulation sedimentation system is connected to the inlet of the filter cloth filter system. The outlet of the filter cloth filter system is connected to the inlet of the clear water tank. The effluent from the clear water tank is lifted to the point of use by the reuse pump. The sludge outlet of the magnetic coagulation sedimentation system is connected to the inlet of the sludge tank. The outlet of the sludge tank is connected to the inlet of the sludge pump. The outlet of the sludge pump is connected to the inlet of the plate and frame filter press.
[0006] Preferably, the magnetic coagulation sedimentation system includes a coagulation reaction tank, a sedimentation tank, and a magnetic recovery machine. The coagulation reaction tank is connected to PAC and PAM dosing devices, the wastewater outlet of the coagulation reaction tank is connected to the sedimentation tank, and the sludge discharge outlet of the sedimentation tank is equipped with a magnetic recovery machine.
[0007] Preferably, the filter cloth filter system is a fiber disc filter.
[0008] Preferably, the outlet of the clear water tank is connected to the filter cloth filter system via a filter backwash pump to supply cleaning water to the filter cloth filter system, and the outlet of the reuse pump is connected to the underground water point.
[0009] Preferably, the backwash outlet of the filter cloth filter system is connected to the inlet of the equalization tank, so that the backwash wastewater is returned to the equalization tank.
[0010] Preferably, a sludge mixer is installed in the sludge tank.
[0011] Preferably, the magnetic coagulation sedimentation system is installed on the mine surface, while the filter cloth filter system is installed below the mine surface. The effluent from the magnetic coagulation sedimentation tank flows by gravity into the filter cloth filter system, eliminating the need for an intermediate water tank and secondary lifting.
[0012] This utility model has the following beneficial effects: This invention removes large suspended particles from water through a magnetic coagulation sedimentation system, and then the suspended particles are removed by the filtration of the filter cloth in the filter cloth filter system. This can reduce the suspended solids (SS) in the water to 5 mg / L. The system operates stably and has a good treatment effect. The combination of magnetic coagulation sedimentation system and filter cloth filter system has the advantages of shorter process, smaller footprint and lower energy consumption compared with traditional mine water treatment system. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the principle framework of this utility model. Detailed Implementation
[0014] The following will be combined with the appendix Figure 1 This invention provides a clear and complete description of the technical solution of a short-process underground coal mine wastewater treatment system, comprising an equalization tank, an equalization tank lift pump, a magnetic coagulation sedimentation system, a filter cloth filter system, a clear water tank, and a reuse pump. The equalization tank is equipped with a wastewater inlet, and its outlet is connected to the equalization tank lift pump. The outlet of the equalization tank lift pump is connected to the inlet of the magnetic coagulation sedimentation system. The outlet of the magnetic coagulation sedimentation system is connected to the inlet of the filter cloth filter system. The outlet of the filter cloth filter system is connected to the inlet of the clear water tank. The effluent from the clear water tank is lifted to the point of use by the reuse pump. The sludge outlet of the magnetic coagulation sedimentation system is connected to the inlet of the sludge tank. The outlet of the sludge tank is connected to the inlet of the sludge pump. The outlet of the sludge pump is connected to the inlet of the plate and frame filter press.
[0015] Preferably, the magnetic coagulation sedimentation system includes a coagulation reaction tank, a sedimentation tank, and a magnetic recovery machine. The coagulation reaction tank is connected to PAC and PAM dosing devices, the wastewater outlet of the coagulation reaction tank is connected to the sedimentation tank, and the sludge discharge outlet of the sedimentation tank is equipped with a magnetic recovery machine.
[0016] Preferably, the filter cloth filter system is a fiber disc filter.
[0017] Preferably, the outlet of the clear water tank is connected to the filter cloth filter system via a filter backwash pump to supply cleaning water to the filter cloth filter system, and the outlet of the reuse pump is connected to the underground water point.
[0018] Preferably, the backwash outlet of the filter cloth filter system is connected to the inlet of the equalization tank, so that the backwash wastewater is returned to the equalization tank.
[0019] Preferably, a sludge mixer is installed in the sludge tank.
[0020] In this embodiment, the magnetic coagulation sedimentation system allows the addition of magnetic media to the coagulation reaction tank, enabling the sedimentation tank surface load to reach 20-50 m³ / m²·h, with a total hydraulic retention time of less than 20 minutes. It features a small footprint. The filter cloth filter system employs a fiber disc filter with a vertically positioned disc, ensuring that all sides of the disc provide effective filtration area. Therefore, a significantly larger filtration area can be achieved within a limited planar area, resulting in high filtration efficiency. Furthermore, the filter cloth filter system exhibits low resistance and minimal head loss compared to traditional magnetic coagulation sedimentation combined with valveless or V-type filters. In this embodiment, the combination of the magnetic coagulation sedimentation system and the filter cloth filter system, with the magnetic coagulation sedimentation system located above the mine surface and the filter cloth filter system located below, allows the effluent from the magnetic coagulation sedimentation tank to flow by gravity into the filter cloth filter system, eliminating the need for intermediate tanks and secondary lifting. This results in a shorter process flow and lower energy consumption.
[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model. These improvements should also be considered within the scope of protection of the present utility model without creative effort.
Claims
1. A short-process underground coal mine wastewater treatment system, characterized in that: This includes an equalization tank, an equalization tank lift pump, a magnetic coagulation sedimentation system, a filter cloth filter system, a clear water tank, and a reuse pump. The equalization tank is equipped with a wastewater inlet, and its outlet is connected to the equalization tank lift pump. The outlet of the equalization tank lift pump is connected to the inlet of the magnetic coagulation sedimentation system. The outlet of the magnetic coagulation sedimentation system is connected to the inlet of the filter cloth filter system. The outlet of the filter cloth filter system is connected to the inlet of the clear water tank. The effluent from the clear water tank is lifted to the point of use by the reuse pump. The sludge outlet of the magnetic coagulation sedimentation system is connected to the inlet of the sludge tank. The outlet of the sludge tank is connected to the inlet of the sludge pump. The outlet of the sludge pump is connected to the inlet of the plate and frame filter press. The magnetic coagulation sedimentation system is installed on the mine surface, while the filter cloth filter system is installed underground. The effluent from the magnetic coagulation sedimentation tank flows into the filter cloth filter system by gravity.
2. The short-process underground coal mine wastewater treatment system according to claim 1, characterized in that: The magnetic coagulation sedimentation system includes a coagulation reaction tank, a sedimentation tank, and a magnetic recovery machine. The coagulation reaction tank is connected to PAC and PAM dosing devices, the wastewater outlet of the coagulation reaction tank is connected to the sedimentation tank, and the sludge discharge outlet of the sedimentation tank is equipped with a magnetic recovery machine.
3. The short-process underground coal mine wastewater treatment system according to claim 1, characterized in that: The filter cloth filter system is a fiber disc filter.
4. The short-process underground coal mine wastewater treatment system according to claim 1, characterized in that: The outlet of the clear water tank is connected to the filter cloth filter system via a filter backwash pump, which supplies cleaning water to the filter cloth filter system. The outlet of the reuse pump is connected to the underground water supply point.
5. The short-process underground coal mine wastewater treatment system according to claim 1, characterized in that: The backwash outlet of the filter cloth filter system is connected to the inlet of the equalization tank, so that the backwash wastewater is returned to the equalization tank.
6. The short-process underground coal mine wastewater treatment system according to claim 1, characterized in that: A sludge mixer is installed inside the sludge tank.