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High-salt non-degradable saccharin industrial wastewater and gas treatment method and device

A technology for industrial wastewater and waste gas treatment, which is applied in food industry wastewater treatment, multi-stage water treatment, water/sewage treatment, etc., and can solve the problems of electrodialysis systems that are difficult to operate stably for a long time, increase energy consumption, and have many impurities

Inactive Publication Date: 2017-08-18
TIANJIN UNITED ENVIRONMENTAL ENG DESIGN +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ion exchange method is only suitable for low-concentration saline wastewater. The treatment of high-salt industrial wastewater will quickly saturate the ion exchange resin and require repeated regeneration, which also produces secondary wastewater; reverse osmosis is used to treat high-salt industrial wastewater. The problem is that high reverse osmosis pressure will lead to increased energy consumption, low concentration ratio will lead to large concentrated water discharge, and high content of organic matter and impurities in high-salt industrial wastewater will lead to serious membrane fouling in the water treatment process; electrodialysis Membrane fouling caused by the adsorption of organic matter on the membrane surface for industrial wastewater desalination makes it difficult for the electrodialysis system to operate stably for a long time

Method used

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  • High-salt non-degradable saccharin industrial wastewater and gas treatment method and device
  • High-salt non-degradable saccharin industrial wastewater and gas treatment method and device
  • High-salt non-degradable saccharin industrial wastewater and gas treatment method and device

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Effect test

Embodiment 1

[0044] A method for treating high-salt refractory saccharin industrial wastewater and waste gas is characterized in that it is carried out according to the following steps:

[0045] (1) Add excessive iron shavings to the acidic wastewater containing copper ions to precipitate copper ions in the acidic wastewater; the amount of iron shavings added to the acidic wastewater: add 1 mol of iron ions to 1 mol of copper ions;

[0046] (2) After neutralizing the supernatant and alkaline wastewater from (1), adjust the pH between 7 and precipitate methyl anthranilate at a temperature of 12°C, and recover the methyl anthranilate for reuse into the production process;

[0047] (3) Perform multi-stage flocculation and precipitation of mixed wastewater to remove COD, suspended and ammonia nitrogen substances in the wastewater; the flocculation and precipitation refers to the adjustment of wastewater after adding polyferric (PFS) and flocculant hydroxyethyl lentin gum solution After the pH...

Embodiment 2

[0053] The device used for the treatment of high-salt refractory saccharin industrial wastewater and waste gas includes a metal removal reaction tank; an acid-base neutralization tank, a secondary flocculation sedimentation tank, a three-effect evaporation crystallization device, an integrated biological treatment tank, and an activated carbon filter Pool, sedimentation tank, mud storage tank, plate and frame filter press, alkaline spray tower, activated carbon adsorption tower; among them, heavy metal removal reaction tank 1 and acid-base neutralization tank 2, secondary flocculation sedimentation tank 3, three-effect evaporation The crystallization device 4, the cooling tower 5, the integrated biological pool 6, the sedimentation tank 7, and the activated carbon filter tank 8 are connected successively; The sludge pump enters the sludge storage tank 9, and the sludge in the sludge storage tank enters the plate and frame filter press 10 through the sludge pump; the alkaline sp...

Embodiment 3

[0055] In a factory producing saccharin, the waste water produced during its reproduction mainly consists of three parts: acid waste water (acid waste water containing copper ions), alkaline waste water and washing waste water. Firstly, iron shavings are added to the acidic wastewater, and the molar number of iron content added is slightly greater than the amount of copper ions contained in the acidic wastewater, so that all the copper ions in the wastewater are precipitated, and the precipitated copper ions can be recovered and reused. system; then neutralize the wastewater and alkaline wastewater after copper removal, after the reaction, the wastewater shows acidity, and then adjust it by adding enhanced sodium oxide. After the pH of the wastewater is adjusted to between 6-8, the temperature is Methyl anthranilate is precipitated at 12-15°C, and the precipitated methyl anthranilate is recovered and reused in the system, as shown in the following table:

[0056] (1) In the pr...

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Abstract

The invention provides a high-salt non-degradable saccharin industrial wastewater and gas treatment method and device. The high-salt non-degradable saccharin industrial wastewater and gas treatment method comprises the following steps: (1) performing copper extraction on acid wastewater containing copper ions; (2) performing acid-base neutralization on the supernate of wastewater from which copper is extracted and alkali wastewater to separate out methyl anthranilate; (3) performing flocculation and sedimentation on the supernate in the step (2) by use of a multi-stage flocculating precipitant; (4) performing evaporative crystallization on wastewater obtained in the step (3) to remove mixed salt sodium sulfate and sodium chloride; (5) performing integrated biotreatment on condensed water evaporated in the step (4) to be standard; and (6) capping all ponds, collecting waste gas, performing alkaline spraying, enabling the collected gas to pass through an active carbon adsorption tower, and performing high-altitude discharge. By use of the coupling and synergistic effect of different unit technologies, organic matters, granular suspended solids, high-price ions, other soluble inorganic salt and the like in high-salt industrial waste gas are removed, deep treatment and standard emission of the high-salt industrial wastewater are realized, and social, economical and environmental benefits are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of saccharin industrial wastewater treatment technology, and relates to the realization of advanced treatment of high-salt industrial wastewater through the coupling and synergistic effect of a physical-chemical method and evaporation technology. Specifically, it is a method and device for treating high-salt refractory saccharin industrial wastewater and waste gas. Background technique [0002] High-salt industrial wastewater is produced in a wide range of ways, and the amount of water is increasing year by year. This wastewater contains a variety of substances (including inorganic salts, organic matter and heavy metal ions, etc.). According to the different production processes, the chemical composition, the types and properties of organic matter of high-salt industrial wastewater are quite different, and there are many types of organic matter, and some refractory organic matter is contained, so it causes ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C01D3/14C01D5/16C22B15/00C22B7/00C07C227/42C07C229/56C02F103/32
CPCC22B7/006C22B15/0091C01D3/14C01D5/16C02F9/00C07C227/42C07C229/56C02F1/5236C02F1/56C02F1/66C02F1/705C02F1/001C02F1/04C02F3/34C02F3/108C02F2301/08C02F2103/32
Inventor 段云霞檀翠玲钟成侯霙李晓静石岩许丹宇曾猛高玮乔楠吕晶华孙凯
Owner TIANJIN UNITED ENVIRONMENTAL ENG DESIGN
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