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Physicochemical treatment system and physicochemical treatment method for hazardous wastes

A hazardous waste and treatment system technology, applied in the field of hazardous waste physical and chemical treatment system, can solve problems such as poor adaptability, achieve strong impact load resistance, improve safety and stability, and achieve standard discharge or reuse effects

Pending Publication Date: 2018-01-12
ENN ENVIROTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the poor adaptability of current hazardous waste physical and chemical treatment technology, the present invention proposes a modularized and reticulated physical and chemical treatment technology, which classifies and centralizes different types of hazardous waste, and realizes each The flexible combination of units forms a variety of combined process systems, which effectively improves the processing capacity of the physical and chemical process, reduces the processing cost, and realizes the discharge or reuse of waste liquid treatment.

Method used

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  • Physicochemical treatment system and physicochemical treatment method for hazardous wastes
  • Physicochemical treatment system and physicochemical treatment method for hazardous wastes
  • Physicochemical treatment system and physicochemical treatment method for hazardous wastes

Examples

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Effect test

Embodiment 1

[0081] The organic waste lye was obtained from the petrochemical gasoline and diesel desulfurization process, and its water quality detection index data are shown in Table 1.

[0082] Table 1 Organic waste lye water quality detection index data

[0083]

[0084] Due to the high pH value of the organic waste lye, first use waste acid to adjust the pH value of the organic waste lye. When the pH of the organic waste lye drops to neutral, a large number of flocs are found, so flocculation precipitation is used. The agent uses polyaluminum chloride (PAC) and anionic polyacrylamide (APAM). The effluent after flocculation and precipitation enters the filter press dehydration unit for solid-liquid separation. Due to the high COD of the filtrate, the waste acid was used to continue to adjust the pH value to acidity for Fenton oxidation treatment. For each ton of organic waste lye, the dosage of PAC is 2kg, the dosage of APAM is 0.01kg, the dosage of ferrous sulfate is 16.68kg, and...

Embodiment 2

[0086] The organic waste lye is taken from the MTO project workshop. The main characteristics of the waste lye are high pH value, high COD value, high salt content, heavy odor, and reddish brown. The main detection index data are shown in Table 2.

[0087] Table 2 Organic waste lye detection index data

[0088]

[0089]

[0090] Use waste to treat waste, use waste acid to adjust the pH of the solution to neutral, and add polyferric sulfate (PFS) and cationic polyacrylamide (CPAM) for flocculation and precipitation to reduce the color, turbidity and organic matter of the solution. The effluent after flocculation and precipitation enters the filter press dehydration unit for solid-liquid separation. Due to the high COD and salt content of the filtrate, use waste acid to continue to adjust the pH value to acidity, add Fenton reagent for deep oxidation, degrade COD, sulfide and other refractory substances, and enter the evaporation unit to remove them after two Fenton oxidat...

Embodiment 3

[0092] The main characteristics of waste paint water are large chroma and turbidity, many suspended solids, heavy odor, pungent odor, and high COD. The mixed centralized treatment of three kinds of paint dye hazardous wastes from Langfang, Table 3 is the water quality detection index data of three kinds of paint dye hazardous wastes.

[0093] Table 3 Three kinds of coating dye hazardous waste water quality detection index data

[0094]

[0095]

[0096] Classification and centralized treatment are adopted. After mixing the three hazardous wastes of paint and dyes in Langfang, they will be treated in one batch. After mixing, flocculants are first added to decolorize and remove turbidity. The effluent after flocculation and precipitation enters the filter press dehydration unit for solid-liquid separation. Due to the high COD of the filtrate, use waste acid to continue to adjust the pH value to acidity, then add Fenton's reagent to degrade toxic and refractory substances,...

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Abstract

The invention relates to the technical field of hazardous wastes, in particular to a physicochemical treatment system and a physicochemical treatment method for the hazardous wastes. The physicochemical treatment system for the hazardous wastes comprises a storage unit, a comprehensive reaction unit, a flocculent settling unit, a demulsification unit, an air flotation unit and a pressure filtration dehydration unit. The system also comprises an advanced oxidation unit, a deep treatment unit, an evaporation unit and a biochemical processing unit.

Description

technical field [0001] The invention relates to the technical field of hazardous waste, in particular to a hazardous waste physical and chemical treatment system and method. Background technique [0002] Hazardous wastes are of various types, with complex components and large fluctuations in properties. At present, the technologies adopted at home and abroad mainly include heat treatment, physical and chemical treatment, comprehensive utilization and solidification landfill. For liquid hazardous waste with low calorific value and low COD value, physical and chemical treatment is often used. However, the physical and chemical treatment process is highly targeted, mostly limited to single-process hazardous waste, or hazardous waste with similar properties. When the types or properties of hazardous waste fluctuate, a single physical and chemical process will have poor treatment effects or even system failure. Due to the poor adaptability of traditional physical and chemical p...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/12C02F11/14C02F101/22
Inventor 董涛冷超群边文强孙慧峰么瑞静
Owner ENN ENVIROTECH CO LTD
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