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Process and system for recycling high-chloride high-concentration non-degradable organic wastewater

A high-chloride, organic wastewater technology, applied in the field of resources and environment, can solve the problems of difficult investment and operating costs, narrow process application range, complex process, etc., and achieve the effects of easy industrial implementation, significant technical and economic effects, and low operating costs

Inactive Publication Date: 2016-09-21
TIANJIN UNIVERSITY OF TECHNOLOGY +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, adsorption, oxidation, extraction, membrane treatment, concentrated crystallization and other processes are mainly used at home and abroad, but there are complex processes, large investment, high cost, and narrow application range of the process, and the concentrated waste salt still contains a large amount of organic matter. To solve the problem fundamentally, some incinerators are used for treatment, and the investment and operation costs are more difficult for enterprises to accept

Method used

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  • Process and system for recycling high-chloride high-concentration non-degradable organic wastewater

Examples

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Effect test

Embodiment 1

[0027] A high-chloride, high-concentration refractory organic waste water recycling system, the steps are as follows:

[0028] 1) Wastewater spray quenching and concentration process

[0029] Step 2) The high-temperature flue gas at 1100°C from the secondary combustion chamber enters the spray quenching tower from the bottom, and the high-salt and high-organic waste water is sprayed on the upper part of the tower, and the flue gas is cooled to 180°C in an instant, eliminating the conditions for dioxin generation; at the same time, the waste water The water in the water is evaporated rapidly, and the concentration is rapidly increased; the tail gas of the spray quenching concentration tower is treated at 90°C and discharged at 90°C; the tail gas absorption liquid enters step 1) waste water storage tank; the concentrated crystals are transported to step 2) high temperature boiling oxidation process.

[0030] 2) High temperature boiling circulation oxidation system

[0031] From...

Embodiment 2

[0034] A high-chloride, high-concentration refractory organic waste water recycling system, the steps are as follows:

[0035] 1) Wastewater spray quenching and concentration process

[0036] Step 2) The 1200°C high-temperature flue gas from the secondary combustion chamber is sprayed from the bottom of the quenching tower, and the upper part of the quenching tower is sprayed with high-salt and high-organic waste water, and the flue gas is instantly cooled to 180°C, eliminating the conditions for dioxin generation; The water in the water is evaporated rapidly, and the concentration is rapidly increased; the tail gas of the spray quenching tower is discharged at 80°C after passing through the tail gas treatment tower; the tail gas absorption liquid enters step 1); the concentrated crystals are transported to step 2) high-temperature boiling oxidation furnace system to decompose organic matter ,.

[0037] 2) High temperature boiling cycle oxidation process

[0038] From step 1...

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Abstract

The invention provides a process and system for recycling high-chloride high-organic-matter wastewater; according to the process, in a set of system, an inorganic salt suitable for a snow melting agent is produced through a high-temperature cyclic oxidation process; organic matter self heat quantity is depended, an auxiliary heat source is externally added, and an organic matter is decomposed with low cost; at the same time, a high-temperature secondary combustion room is designed, and dioxin is decomposed; wastewater is subjected to atomized quenching concentration by using high temperature flue gas, and hazardous waste recycling treatment is realized with low cost; the process is especially suitable for organic wastewater containing sodium chloride, calcium chloride, magnesium chloride and other high-chloride salts, but also can be used for recycling disposal of other high-salt high-concentration organic wastewater, and has great economic and social benefits.

Description

technical field [0001] The invention relates to the field of resources and the environment, in particular to a process and system for recycling high-chloride, high-concentration, refractory organic wastewater. Background technique [0002] my country's chlor-alkali industry produces more than 2.5 million tons of chlorine gas per year, and the by-product of chlor-alkali alone is more than 10 million tons of industrial hydrochloric acid. Among them, a large proportion of chlorine gas-using industries and hydrochloric acid-using industries are organic chemical industries, which produce a large amount of chloride-containing high-salt organic wastewater More than 300 million tons of wastewater; especially the high-salt wastewater of pharmaceutical intermediates, pesticide intermediates, and by-products of the petrochemical industry, which has high concentration, deep color, high toxicity, and complex pollutant components. It is a typical high-salt, high-concentration, refractory wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C09K3/18
CPCC02F1/048C09K3/18
Inventor 李梅彤袁文蛟张小江张柯夏协兵郑勇范文浩
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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