Environment-friendly system for moderately treating beneficiation wastewater

Abstract

The utility model discloses an environment-friendly system for moderately treating beneficiation wastewater, which is characterized in that an adjusting tank, a stirring tank and a flocculation sedimentation tank are sequentially connected through ditches, the upper end of the flocculation sedimentation tank is connected with a water storage tank through a ditch, and the lower end of the flocculation sedimentation tank is connected with a fine particle collecting tank through a pipeline and a pump; the upper end of the reservoir is connected with the high-level water tank through a pipeline and a pump, the lower end of the fine particle collecting tank is connected with the production system through a pipeline and a pump, and the upper end of the fine particle collecting tank is connected with the regulating tank through a pipeline. According to the utility model, the overflow water of the concentrate thickening pool and the filling overflow water are collected to the adjusting pool for flow stabilization, the PAC and the PAM are added to carry out flocculating settling treatment on the overflow water, the content of heavy metals and suspended solids in wastewater is reduced, and the treated water is returned to the high-level water pool and is used as supplementary water for a production system, so that fresh water resources are saved, and the production cost is reduced. Meanwhile, the sludge is collected into the fine particle collecting tank and returns to a production system, so that the resource utilization rate is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and in particular relates to an environmental protection system for moderately treating mineral processing wastewater. Background Art

[0002] The flotation process for lead-zinc sulfide ores consumes significant amounts of water due to the diverse composition of the raw ore and the lengthy separation process. Furthermore, to improve separation efficiency, various reagents must be added, generating large quantities of complex wastewater. This wastewater not only contains significant amounts of residual reagents but also is rich in heavy metal ions and suspended solids, posing a potential threat to the environment. Therefore, the wastewater must undergo rigorous treatment to ensure it meets discharge standards. However, this treatment process is not only technically challenging but also costly, placing a heavy financial burden on companies. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the above-mentioned existing technologies and provide an environmentally friendly system for moderately treating mineral processing wastewater. By moderately treating the overflow water from the concentrate thickening tank and the overflow water from the filling tank, the content of heavy metals and suspended solids in the wastewater is significantly reduced. The wastewater is then used as make-up water for the production system, effectively saving fresh water resources and reducing the economic burden on the enterprise. At the same time, the generated sludge is also returned to the production system, effectively improving resource utilization and achieving good economic and social benefits.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the utility model is:

[0005] An environmental protection system for moderately treating mineral processing wastewater comprises a regulating tank, a stirring tank, a flocculation sedimentation tank, a water reservoir, a high-level water tank, a fine particle collection tank and a production system, wherein the regulating tank is connected to the stirring tank via a ditch, the stirring tank is connected to the flocculation sedimentation tank via a ditch, the upper end of the flocculation sedimentation tank is connected to the water reservoir via a ditch, the lower end of the flocculation sedimentation tank is connected to the fine particle collection tank via a pipeline and a pump, the upper end of the water reservoir is connected to the high-level water tank via a pipeline and a pump, the lower end of the fine particle collection tank is connected to the production system via a pipeline and a pump, and the upper end of the fine particle collection tank is connected to the regulating tank via a pipeline.

[0006] As a further improved technical solution of the present invention, the overflow water of the concentrate thickening tank and the overflow water of the filling tank are both collected in the regulating tank, and after stabilization, enter the stirring tank through the ditch.

[0007] As a further improved technical solution of the present invention, the stirring tank consists of three areas: a PAC stirring zone, a reaction zone and a PAM stirring zone. The water flows from the bottom hole through the PAC stirring zone and the reaction zone in sequence, and then flows from the PAM stirring zone through the ditch through the upper overflow port into the flocculation sedimentation tank.

[0008] As a further improved technical solution of the present invention, the flocculation sedimentation tank is composed of three identical trapezoidal areas. The pool wall of each trapezoidal area is designed to be a slope, gradually sloping down from the edge of the pool to the center until it seamlessly connects with the plane of the bottom; the three trapezoidal areas are equipped with independent sludge pumps, all connected to the fine particle collection tank.

[0009] As a further improved technical solution of the utility model, the water flows into the water reservoir in a clockwise order, passes through four identical squares from the upper end in turn, and finally is pumped into the high-level water tank through pipes and water pumps.

[0010] As a further improved technical solution of the present invention, the sludge at the bottom of the fine particle collection tank is pumped back to the production system by a sludge pump, and the clean water at the upper end overflows to the regulating tank through a pipeline.

[0011] The beneficial effects of the utility model are:

[0012] This utility model proposes an environmentally friendly system for moderately treating mineral processing wastewater. This system uses PAC and PAM to treat overflow water from the concentrate thickening tank and backfill, significantly reducing the heavy metal and suspended solids content in the wastewater. The treated water is then returned to the production system, saving fresh water resources and reducing enterprise costs. Furthermore, the generated sludge is recycled, improving resource utilization and achieving positive economic and social benefits.

[0013] Polyaluminum chloride (PAC), also known as basic aluminum chloride or aluminum hydroxychloride, or its hydrolysis products, rapidly precipitate colloids in sewage or sludge, facilitating the separation of large particles. Polyacrylamide (PAM), commonly known as a flocculant or coagulant, has an average molecular weight ranging from thousands to tens of millions. It has several functional groups along its bonds and is largely ionized in water, making it a polymer electrolyte. Cationic and anionic PAM are suitable for negatively and positively charged sewage or sludge, respectively.

[0014] This new flocculation sedimentation tank features a trapezoidal interior, allowing wastewater and sludge to naturally flow along the sloped walls toward the center of the bottom under the influence of gravity. The sloped walls increase the contact area, accelerating sludge settling and reducing suspension time. The flat, solid bottom ensures stable sludge deposition, facilitating cleaning and maintenance, and improving sludge removal efficiency. Furthermore, independent sludge pumps are installed in each of the three trapezoidal sections, allowing for flexible selection of treatment methods based on sludge sedimentation conditions, enhancing operational flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the process of the utility model;

[0016] Figure 2This is the equipment connection diagram of the present utility model.

[0017] Among them, the serial numbers in the figure are marked as follows: 1-regulating tank, 2-stirring tank, 3-flocculation sedimentation tank, 4-water storage tank, 5-high-level water tank, 6-fine particle collection tank, 7-production system, 8-PAC stirring zone, 9-PAC reaction zone, 10-PAM stirring zone. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] like Figure 1 As shown, an environmental protection system for moderately treating mineral processing wastewater includes a regulating tank 1, a stirring tank 2, a flocculation sedimentation tank 3, a water reservoir 4, a high-level water tank 5, a fine particle collection tank 6 and a production system 7. The regulating tank 1 is connected to the stirring tank 2 through a ditch, the stirring tank 2 is connected to the flocculation sedimentation tank 3 through a ditch, the upper end of the flocculation sedimentation tank 3 is connected to the water reservoir 4 through a ditch, the lower end of the flocculation sedimentation tank 3 is connected to the fine particle collection tank 6 through a pipeline and a pump, the upper end of the water reservoir 4 is connected to the high-level water tank 5 through a pipeline and a pump, the lower end of the fine particle collection tank 6 is connected to the production system 7 through a pipeline and a pump, and the upper end of the fine particle collection tank 6 is connected to the regulating tank 1 through a pipeline.

[0020] In this embodiment, the overflow water of the concentrate thickening tank and the filling overflow water are both collected in the regulating tank 1, and after stabilization, enter the stirring tank 2 through the ditch.

[0021] like Figure 2 As shown, the stirring tank 2 consists of three areas: a PAC stirring zone 8, a reaction zone 9 and a PAM stirring zone 10. The water flows from the bottom hole through the PAC stirring zone 8 and the reaction zone 9 in sequence, and then flows from the PAM stirring zone 10 through the ditch through the upper overflow port into the flocculation sedimentation tank 3.

[0022] In this embodiment, the flocculation sedimentation tank 3 is composed of three identical trapezoidal areas. The walls of the trapezoidal areas are designed to be inclined, gradually sloping down from the edge of the tank to the center until they are seamlessly connected to the plane of the bottom; the three trapezoidal areas are equipped with independent sludge pumps, all of which are connected to the fine particle collection tank 6.

[0023] In this embodiment, the water flows into the water reservoir 4 in a clockwise order, passes through the four identical squares from the upper end, and finally is pumped into the high-level water tank 5 through pipes and water pumps.

[0024] In this embodiment, the sludge at the bottom of the fine particle collection tank 6 is pumped back to the production system by a sludge pump, and the clean water at the upper end overflows to the regulating tank through a pipeline.

[0025] The environmentally friendly system treatment method for moderately treating mineral processing wastewater:

[0026] The overflow water and filling overflow water generated after the flotation concentrates are concentrated and dehydrated in the thickener are both piped to the regulating tank 1. After stabilization, they flow through ditches into the mixing tank 2. The mixing tank 2 is equipped with a PAC stirring zone 8, a reaction zone 9, and a PAM stirring zone 10. After the water flows through these three zones in sequence, it flows from the overflow port at the top of the PAM stirring zone 10 through the ditch into the flocculation sedimentation tank 3. The flocculation sedimentation tank 3 consists of three identical trapezoidal areas. After the sludge settles to the bottom and accumulates to a certain amount, it is pumped to the fine particle collection tank 6 by a sludge pump. The sludge pump then returns the sludge to the production system 7. The upper clear water of the flocculation sedimentation tank 3 enters the water storage tank 4 through the ditch. The overflow water is pumped to the high-level water tank 5 by pipes and water pumps. The overflow water of the fine particle collection tank 6 overflows back to the regulating tank 1 through pipes, forming a complete wastewater treatment cycle.

[0027] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention is based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field fall within the protection scope of the present invention.

Claims

1. An environmental protection system for moderately treating mineral processing wastewater, characterized by: The invention comprises a regulating tank (1), a stirring tank (2), a flocculation sedimentation tank (3), a water storage tank (4), a high-level water tank (5), a fine particle collection tank (6) and a production system (7), wherein the regulating tank (1) is connected to the stirring tank (2) through a ditch, the stirring tank (2) is connected to the flocculation sedimentation tank (3) through a ditch, the upper end of the flocculation sedimentation tank (3) is connected to the water storage tank (4) through a ditch, the lower end of the flocculation sedimentation tank (3) is connected to the fine particle collection tank (6) through a pipeline and a pump, the upper end of the water storage tank (4) is connected to the high-level water tank (5) through a pipeline and a pump, the lower end of the fine particle collection tank (6) is connected to the production system (7) through a pipeline and a pump, and the upper end of the fine particle collection tank (6) is connected to the regulating tank (1) through a pipeline.

2. The environmental protection system for moderately treating mineral processing wastewater according to claim 1, characterized in that: The overflow water from the concentrate thickening tank and the overflow water from the filling tank are collected in the regulating tank (1), and after the flow is stabilized, they enter the mixing tank (2) through the ditch.

3. The environmental protection system for moderately treating mineral processing wastewater according to claim 1, characterized in that: The stirring tank (2) consists of three areas: the PAC stirring zone (8), the reaction zone (9) and the PAM stirring zone (10). The water flows from the bottom hole through the PAC stirring zone (8), the reaction zone (9) in sequence, and then flows from the PAM stirring zone (10) through the ditch through the upper overflow port into the flocculation sedimentation tank (3).

4. The environmental protection system for moderately treating mineral processing wastewater according to claim 1, characterized in that: The flocculation sedimentation tank (3) consists of three identical trapezoidal areas. The wall of each trapezoidal area is designed to be inclined, gradually sloping down from the edge of the tank to the center until it seamlessly connects with the bottom plane. The three trapezoidal areas are equipped with independent sludge pumps, all connected to the fine particle collection tank (6).

5. The environmental protection system for moderately treating mineral processing wastewater according to claim 1, characterized in that: The water flows into the reservoir (4) in a clockwise order, passes through the four identical squares from the top, and finally reaches the high-level water tank (5) through pipes and water pumps.

6. The environmental protection system for moderately treating mineral processing wastewater according to claim 1, characterized in that: The sludge at the bottom of the fine particle collection tank (6) is pumped back to the production system by the sludge pump, and the clean water at the top overflows into the regulating tank through the pipeline.

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