Lead and zinc industrial wastewater treatment device and method

A technology for industrial waste water and treatment equipment, which is applied in mining waste water treatment, metallurgical waste water treatment, multi-stage water treatment, etc. It can solve the problems of high energy consumption, high cleaning cost, large circulation flow and circulation pressure, and achieve low energy consumption. , low cleaning cost and stable membrane flux

Pending Publication Date: 2017-02-22
桂润环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3) The cleaning cycle of PVDF tubular microfiltration membrane is short, only 8 hours, and the cleaning cost is high;
[0007] 4) PVDF tubular microfiltration membrane adopts circulation filtration, the circulation flow rate and circulation pressure are relatively large, and the energy consumption is relatively high

Method used

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  • Lead and zinc industrial wastewater treatment device and method
  • Lead and zinc industrial wastewater treatment device and method
  • Lead and zinc industrial wastewater treatment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Wastewater discharged from a lead-zinc beneficiation plant contains harmful components such as copper, lead, zinc, selenium, arsenic, organic matter, and ammonia nitrogen.

[0075] The beneficiation wastewater is lifted to the primary reaction pool by a corrosion-resistant self-priming pump, and sodium hydroxide is added to pre-adjust the pH to 8.0-9.0, and sodium sulfide is added at a ratio of 120 mg / L, and the reaction is stirred for 1 hour.

[0076] Enter the secondary reaction pool, add ferrous sulfate according to the ratio of 160mg / L, and stir for 1h.

[0077] Enter the primary sedimentation tank for solid-liquid separation, and the supernatant is discharged into the double-membrane treatment tank.

[0078] The self-priming pump is used to extract the treated clean water, the flow rate of the effluent is the same as that of the water to be treated, the head is less than 10m, the energy consumption is low, and the pH value of the effluent is 7.2.

[0079] The slud...

Embodiment 2

[0091] A lead-zinc metal smelting enterprise discharges smelting wastewater and a small amount of domestic sewage, which contains organic matter, ammonia nitrogen, lead, zinc, arsenic, cadmium and other pollutants that exceed the discharge standard. The wastewater is acidic, with a pH value of 4-7.

[0092] Adopt the test device of embodiment 1 to process, and the treatment water volume is 6 tons / day.

[0093] Lead-zinc industrial smelting wastewater is lifted to the primary reaction pool of the treatment device by an acid-resistant pump, and calcium hydroxide is added to pre-adjust the pH to 8.0-9.0, and sodium sulfide is added at a ratio of 160 mg / L, and the reaction is stirred for 1.5 hours.

[0094] Enter the secondary reaction tank, add ferrous sulfate according to the ratio of 220mg / L, and stir for 1.5h.

[0095] Enter the primary sedimentation tank for solid-liquid separation, and the supernatant is discharged into the double-membrane treatment tank.

[0096] The self-...

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Abstract

The invention provides a lead and zinc industrial wastewater treatment device and a lead and zinc industrial wastewater treatment method. The lead and zinc industrial wastewater treatment device provided by the invention comprises a first-order reaction tank, a second-order reaction tank, a primary settling tank and a double-membrane treatment tank, which are communicated in sequence, wherein the top of the first-order reaction tank is communicated with a sulfide adding device and an acid-base adding device; the top of the second-order reaction tank is communicated with a ferric salt adding device; the double-membrane treatment tank comprises a biological membrane filler, a hydrophilic polytetrafluoroethylene membrane module and aeration devices; the biological membrane filler and the hydrophilic polytetrafluoroethylene membrane module are arranged from front to back in sequence; the aeration devices are arranged at the bottoms of the biological membrane filler and the hydrophilic polytetrafluoroethylene membrane module. The lead and zinc industrial wastewater treatment device provided by the invention has the technical effects that heavy metals, arsenic, organic maters and ammonia nitrogen can be effectively removed, so the wastewater can be directly discharged; the device adopts the polytetrafluoroethylene membrane, so the membrane flux is more stable and can reach the nominal value; the membrane cleaning period is longer than half a year, so the cleaning cost is low.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a lead-zinc industrial wastewater treatment device and method. Background technique [0002] Wastewater discharged from the mineral processing and smelting industries of the lead-zinc industry contains toxic heavy metal pollutants such as lead, zinc, copper, cadmium, arsenic, etc. If it is directly discharged into water bodies without treatment, it will cause serious pollution to the environment. Because heavy metals cannot be degraded in the environment, they are easy to combine with various ligands in the environment to enhance their migration and diffusion capabilities, and then absorb them through plants and produce biomagnification, thereby endangering human health through the food chain. Very dangerous. The country is increasingly controlling heavy metal pollution. In key monitoring areas, the discharge standards for mineral processing and smelting wastewa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/10C02F103/16
CPCC02F9/00C02F2001/007C02F2103/16C02F2103/10C02F2301/08C02F1/44C02F1/52C02F3/02
Inventor 魏江州张小平孙帮周
Owner 桂润环境科技股份有限公司
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