Rainwater and wastewater split-flow treatment system for smelting plant

Abstract

The rainwater and wastewater split-flow treatment system comprises a rainwater treatment system and a production wastewater treatment system, the rainwater treatment system comprises a trench, the tail end of the trench is connected to a rainwater pipe network, and the tail end of the rainwater pipe network is provided with an initial rainwater treatment station and a later rainwater discharge outlet. The initial rainwater treatment station comprises a rainwater tank, a reaction tank, a coagulation reaction tank, a flocculation reaction tank, a sedimentation tank, a PH callback tank and a water return tank which are connected step by step; the production wastewater treatment system comprises a sewage pipe network, the tail end of the sewage pipe network is connected with a wastewater adjusting tank, the outlet end of the wastewater adjusting tank is connected with a reaction tank, a coagulation reaction tank, a flocculation reaction tank, a sedimentation tank, a PH callback tank, an intermediate water tank and a clean water tank step by step, and the clean water tank is connected to an ultrafiltration system; according to the utility model, the efficient treatment of wastewater is realized, the repeated utilization rate of water resources reaches more than 90%, the discharged water quantity and the water quality are ensured, and the recycled water quantity and the water quality also meet the standard requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of smeltery sewage treatment, in particular to a rainwater and wastewater diversion treatment system for a smeltery. Background Art

[0002] Arsenic, copper, and other pollutants are generated during smelting, processing, or chemical processing in the nonferrous industry. Some older smelters collect and transmit rainwater and various wastewater systems together, failing to separate rainwater, industrial wastewater, and domestic sewage networks. Initial rainwater is not collected separately and treated at treatment stations. Acidic, heavy wastewater is not treated and reused separately in accordance with the "Principles for the Approval of Environmental Impact Assessment Documents for Copper, Lead, and Zinc Smelting Construction Projects," ultimately returning to the wastewater treatment station. This lack of rainwater and sewage diversion violates regulations and fails to ensure that drainage volume and quality meet standards in real time. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a rainwater wastewater diversion treatment system for a smelter, which ensures the discharge water volume and water quality, and the recycled water volume and water quality can meet the regulatory requirements.

[0004] The specific scheme of the present utility model is as follows: a rainwater wastewater diversion treatment system for a smelter, including a rainwater treatment system and a production wastewater treatment system, the rainwater treatment system includes a ditch, the end of the ditch is connected to the rainwater pipe network, the end of the rainwater pipe network is provided with an initial rainwater treatment station and a later rainwater discharge outlet, the initial rainwater treatment station includes a rainwater pool, a reaction pool, a coagulation reaction tank, a flocculation reaction tank, a sedimentation tank, a pH adjustment pool, and a return water pool connected in stages; the production wastewater treatment system includes a sewage pipe network, the end of the sewage pipe network is connected to a wastewater regulating tank, the outlet end of the wastewater regulating tank is connected in stages with a reaction pool, a coagulation reaction tank, a flocculation reaction tank, a sedimentation tank, a pH adjustment pool, an intermediate water tank, and a clear water tank, and the clear water tank is connected to an ultrafiltration system.

[0005] Preferably, it also includes a waste acid treatment station, which includes a dissolved air tank, a decalcification reaction tank, a decalcification flocculation tank, a decalcification thickener, a filter, and a decalcification clear water tank connected in stages.

[0006] Preferably, the sedimentation tank is also connected to a sludge tank, the sludge tank is connected to a filter press, and the filter residue produced by the filter press is returned to the furnace for reuse.

[0007] Preferably, the sewage pipe network is installed through a bridge frame, and the rainwater pipe network is buried underground.

[0008] Compared with the existing technology, the utility model has the following beneficial effects: the existing combined sewer system is changed to a separate system, the heavy wastewater and initial rainwater in the factory area are reused after treatment, the wastewater treatment facilities and processes are optimized, and a decalcification device is added to achieve efficient wastewater treatment. The water resource reuse rate reaches more than 90%, the discharge water volume and water quality are guaranteed, and the recycled water volume and water quality also meet the regulatory requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the production wastewater treatment system and process of this utility model;

[0010] Figure 2 This is a schematic diagram of the waste acid treatment station and process of the utility model;

[0011] Figure 3 This is a rainwater treatment system and process diagram of the utility model. DETAILED DESCRIPTION

[0012] like Figure 1-3 As shown, this embodiment is a rainwater wastewater diversion treatment system for a smelter, including a rainwater treatment system and a production wastewater treatment system. The rainwater treatment system includes a ditch, the end of the ditch is connected to the rainwater pipe network, and the end of the rainwater pipe network is provided with an initial rainwater treatment station and a later rainwater discharge outlet. The initial rainwater treatment station includes a rainwater pool, a reaction pool, a coagulation reaction tank, a flocculation reaction tank, a sedimentation tank, a pH correction pool, and a return water pool connected in stages; the production wastewater treatment system includes a sewage pipe network, the end of the sewage pipe network is connected to a wastewater regulating tank, and the outlet end of the wastewater regulating tank is connected in stages with a reaction pool, a coagulation reaction tank, a flocculation reaction tank, a sedimentation tank, a pH correction pool, an intermediate water tank, and a clear water tank, and the clear water tank is connected to an ultrafiltration system.

[0013] Preferably, it also includes a waste acid treatment station, which includes a dissolved air tank, a decalcification reaction tank, a decalcification flocculation tank, a decalcification thickener, a filter, and a decalcification clear water tank connected in stages.

[0014] Preferably, the sedimentation tank is also connected to a sludge tank, the sludge tank is connected to a filter press, and the filter residue produced by the filter press is returned to the furnace for reuse.

[0015] Preferably, the sewage pipe network is installed through a bridge frame, and the rainwater pipe network is buried underground.

[0016] The use of the above-mentioned treatment system and process can achieve the separation of clean and dirty water in the factory area. All initial rainwater is collected, treated and reused. All production wastewater and heavy sewage are transported by power pipelines. The reuse rate of water resources reaches more than 90%. Rainwater and production wastewater are discharged by diversion system. The discharge water volume and water quality are guaranteed. The reuse water volume and water quality also meet the regulatory requirements, meeting the principles of differentiated treatment, zoned collection and cascade reuse. After treatment, the initial rainwater complies with the "Industrial Circulating Cooling Water Treatment Design Specifications" and the "Copper, Nickel and Cobalt Industrial Pollutant Emission Standards". The discharged clean rainwater complies with the "Copper, Nickel and Cobalt Industrial Pollutant Emission Standards". The production wastewater complies with the Level A standard in the "Urban Sewage Treatment Plant Pollutant Emission Standards" (GB18198-2002). The decalcification and softening effluent complies with the "Copper, Nickel and Cobalt Industrial Pollutant Emission Standards". The domestic sewage drainage indicators comply with the B-level standard of the "Water Quality Index for Sewage Discharge into Urban Sewers".

Claims

1. A rainwater wastewater diversion treatment system for a smelter, characterized by: It includes a rainwater treatment system and a production wastewater treatment system. The rainwater treatment system includes a ditch, the end of the ditch is connected to the rainwater pipe network, the end of the rainwater pipe network is provided with an initial rainwater treatment station and a later rainwater discharge outlet, the initial rainwater treatment station includes a rainwater pool, a reaction pool, a coagulation reaction tank, a flocculation reaction tank, a sedimentation tank, a pH correction pool, and a return water pool connected in stages; the production wastewater treatment system includes a sewage pipe network, the end of the sewage pipe network is connected to a wastewater regulating tank, the outlet end of the wastewater regulating tank is connected in stages with a reaction pool, a coagulation reaction tank, a flocculation reaction tank, a sedimentation tank, a pH correction pool, an intermediate water tank, and a clear water tank, and the clear water tank is connected to an ultrafiltration system.

2. The rainwater wastewater diversion treatment system for a smelter according to claim 1 is characterized by: It also includes a waste acid treatment station, which includes a dissolved air tank, a decalcification reaction tank, a decalcification flocculation tank, a decalcification thickener, a filter, and a decalcification clear water tank connected in stages.

3. The rainwater wastewater diversion treatment system for a smelter according to claim 1, characterized in that: The sedimentation tank is also connected to a sludge tank, which is connected to a filter press. The filter residue produced by the filter press is recycled.

4. The rainwater wastewater diversion treatment system for a smelter according to claim 1, characterized in that: The sewage pipe network is installed through a bridge frame, and the rainwater pipe network is buried underground.

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