Process and system for treating hydrochloric acid-containing wastewater

A technology for acid wastewater and treatment systems, applied in water/sewage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high wastewater treatment costs, achieve no discharge of three wastes, and have a good operating environment , the effect of avoiding emission pollution

Inactive Publication Date: 2018-09-11
无锡英罗唯森科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a process and system for the treatment of saline-acid wastewater, which aims to improve the existing treatment of saline-acid wastewater that requires a large amount of neutralizer treatment, resulting in high wastewater treatment costs

Method used

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  • Process and system for treating hydrochloric acid-containing wastewater
  • Process and system for treating hydrochloric acid-containing wastewater
  • Process and system for treating hydrochloric acid-containing wastewater

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Embodiment

[0049] figure 1 A schematic flow chart of the system 100 for treating acidic acidic wastewater containing salt provided by the embodiment of the present invention is shown. see figure 1 , this embodiment provides a saline-containing acidic wastewater treatment system 100, which is mainly used for the treatment and recovery of saline-containing acidic wastewater.

[0050] The hydrochloric acid wastewater treatment system 100 includes a primary evaporation concentration section 110 and a secondary evaporation concentration section 120 . The secondary evaporation concentration section 120 is connected with the primary evaporation concentration section 110 .

[0051] The primary evaporation concentration section 110 includes a primary flash tank 111 and a primary vapor-liquid separation tank 112 ; the primary vapor-liquid separation tank 112 is connected to the primary flash tank 111 .

[0052] The primary flash tank 111, the primary vapor-liquid separation tank 112, the secondar...

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PUM

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Abstract

The invention relates to the field of chemical industry, in particular to a process and system for treating hydrochloric acid-containing wastewater. The system for treating the hydrochloric acid-containing wastewater comprises a first-stage evaporation concentration section and a second-stage evaporation concentration section which are sequentially connected. The hydrochloric acid-containing wastewater is flashed through a first-stage flash tank, the hydrochloric acid-containing wastewater is concentrated and separated in a first-stage vapor-liquid separation tank, after separation in the first-stage vapor-liquid separation tank, the hydrochloric acid-containing wastewater is introduced into a secondary flash tank to be concentrated again, the hydrochloric acid-containing wastewater is saturated, part of salt is precipitated, waste acid is concentrated, and the dissolved salt is evaporated and crystallized simultaneously to achieve the purpose of separation. Concentrated operating environment is good, acid gas emission pollution is completely avoided, there is no three waste emission, and the system has the advantages of environmental protection and emission reduction.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a process and system for treating hydrochloric acid wastewater. Background technique [0002] Acid-base wastewater is a common type of wastewater treatment. Acidic wastewater mainly comes from iron and steel plants, chemical plants, dye factories, electroplating plants and mines, etc. Wastewater treatment should focus on the treatment of various harmful substances or heavy metal salts. The mass fraction of acid in wastewater treatment varies greatly, ranging from less than 1% to more than 10%. Alkaline wastewater mainly comes from printing and dyeing factories, leather factories, paper mills, oil refineries, etc. When wastewater is treated, it will encounter organic alkali or inorganic alkali. Some mass fractions of alkali are higher than 5%, and some are lower than 1%. Acid-base wastewater often contains acid salts, basic salts, and other inorganic and organic substances in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/06
CPCC02F1/043C02F1/048C02F1/06
Inventor 徐鹏飞李志刚
Owner 无锡英罗唯森科技有限公司
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