Advanced treatment method of triethylamine salt-containing wastewater

A technology for advanced treatment of salty wastewater, applied in water/sewage treatment, natural water treatment, water/sewage multi-stage treatment, etc. It can solve the problems of evaporator tube and tube wall, so as to improve the treatment capacity and meet the requirements of environmental protection. Requirements, the effect of prolonging the normal use cycle

Inactive Publication Date: 2020-02-28
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to solve the defect that the triethylamine wastewater in the prior art is easy to cause the wall of the evaporator tube to form a wall, and to provide a method for advanced treatment of triethylamine saline wastewater

Method used

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  • Advanced treatment method of triethylamine salt-containing wastewater
  • Advanced treatment method of triethylamine salt-containing wastewater

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Embodiment Construction

[0012] Such as figure 1 Shown, a kind of triethylamine saline wastewater advanced treatment method provided by the invention comprises the following steps:

[0013] 1) After the triethylamine wastewater is pre-precipitated in the sedimentation tank, part of the calcium sulfate precipitated from supersaturation is removed first;

[0014] 2) The pre-precipitated triethylamine wastewater overflows to the oxidation tank, and the oxidation tank is added with ferrous sulfate with a weight ratio of 1% per ton of wastewater and hydrogen peroxide with a weight ratio of 0.4-0.5% per ton of wastewater, and reacts by stirring and mixing. Oxidize part of the organic matter in the triethylamine wastewater, and then undergo coagulation and precipitation;

[0015] 3) The triethylamine wastewater after coagulation and sedimentation overflows to the flocculation sedimentation tank, and the pH is adjusted to 6-7 by adding liquid caustic soda, then adding polyaluminum chloride with a weight rati...

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Abstract

The invention relates to an advanced treatment method of triethylamine salt-containing wastewater in an acesulfame potassium production process. The method comprises the following steps: 1) removing apart of supersaturated precipitated calcium sulfate after pre-precipitation of triethylamine wastewater, 2) adding ferrous sulfate accounting for 1% by weight of each ton of the wastewater and hydrogen peroxide accounting for 0.4-0.5% by weight of each ton of the wastewater to oxidize a part of organic matters in the triethylamine wastewater, and carrying out coagulating sedimentation, and 3) adjusting the pH value of the triethylamine wastewater subjected to coagulating sedimentation to 6-7, and adding 0.2% by weight of polyaluminum chloride and 0.04-0.05% by weight of polyacrylamide into each ton of the wastewater for flocculating sedimentation, thereby reducing the organic matter content and calcium sulfate content of the wastewater. The method has the advantages that the content of organic matters and the concentration of calcium sulfate in the wastewater can be effectively removed, and a part of calcium sulfate and organic matters are removed through pretreatment before the wastewater enters the evaporator, so that the normal service cycle of the evaporator is prolonged, and the triethylamine wastewater treatment capacity is greatly improved.

Description

technical field [0001] The invention relates to the field of saline waste water treatment in the production process of acesulfame potassium, and mainly relates to a pretreatment method for triethylamine saline waste water before evaporation. Background technique [0002] The main components of the triethylamine wastewater produced during the production of acesulfame potassium include: saturated calcium sulfate, acesulfame potassium, triethylamine and a small amount of acesulfame potassium and its by-products. The existing triethylamine wastewater treatment process directly enters MVR is evaporated and concentrated, and the saturated concentrated solution is centrifuged to separate the crystallized salt, and the remaining high-concentration wastewater is further processed. [0003] Because triethylamine wastewater contains a certain amount of calcium sulfate, which is slightly soluble in water, without pretreatment, entering the evaporator will cause wall formation of the eva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/36C02F101/38
CPCC02F9/00C02F2103/36C02F2101/38C02F2001/007C02F1/722C02F1/5236C02F1/56
Inventor 仇兆山李长城程远健杨池兵
Owner ANHUI JINGHE IND
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