Recycling method of high-salinity wastewater

A high-salt wastewater recycling and treatment technology, applied in energy wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of non-reuse, increased wastewater treatment cost, and low purity. Achieve the effect of realizing recycling, realizing resource utilization, and simple and stable process conditions

A high-salt wastewater recycling and treatment technology, applied in energy wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of non-reuse, increased wastewater treatment cost, and low purity. Achieve the effect of realizing recycling, realizing resource utilization, and simple and stable process conditions

CN104591464AActive Publication Date: 2015-05-06SHIJIAZHUANG GONGDA CHEM EQUIP +1
3 Cites 51 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Recycling method of high-salinity wastewater
  • Recycling method of high-salinity wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The technological process of this embodiment is as figure 2 As shown, a three-effect co-current evaporation process was adopted.

[0058] In this embodiment, the primary evaporation and crystallization adopts a double-effect downstream process; the first-effect evaporator adopts a falling film evaporator, including a first-effect separation chamber 5 and a first-effect heating chamber 4; the second-effect evaporator adopts a forced circulation evaporation crystallizer, including Two-effect crystallizer 7 and two-effect heating chamber 6. The cooling and crystallization adopts a jacketed cooling stirring tank, and the refrigerant adopts frozen brine. The secondary evaporation crystallizer adopts a single-effect forced circulation evaporator, and the secondary evaporation crystallizer includes a three-effect separation chamber 16 and a three-effect heating chamber 15 .

[0059] Material flow direction:

[0060] A. One evaporation crystallization

[0061] The high-sal...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a recycling method of high-salinity wastewater. Sodium sulfate and sodium chloride are recycled through three steps of primary evaporative crystallization, cooling crystallization and secondary evaporation crystallization. According to the method disclosed by the invention, sodium sulfate and sodium chloride in the high-salinity wastewater of coal chemical industry can be effectively recycled; the method is simple and stable in technological conditions; industrial popularization is facilitated; the recycled sodium sulfate and sodium chloride meet the quality requirements of industrial products, and can be directly recovered and applied mechanically or sold as byproducts, so that the target of treating the high-salinity wastewater is reached; the requirements of the current environment-friendly situation are met; waste is changed into treasures; resource utilization of salts is achieved; and benefits of factories are improved.

Description

Technical field [0001] The invention relates to a wastewater treatment method, in particular to a recovery and treatment method of high-salt wastewater in the coal chemical industry. Background technique [0002] A large amount of sewage is discharged during the coal chemical production process. In addition to organic matter, these sewages also contain a large amount of salts. Coal chemical industry wastewater undergoes biochemical treatment to reduce organic matter and filtration to remove solid matter. The remaining wastewater mainly contains sodium sulfate, sodium sulfide, and trace amounts of other salts, which is usually called high-salt wastewater. [0003] The treatment technology of high-salt wastewater has been studied at home and abroad for decades. Currently, the commonly used methods mainly include biological methods, SBR technology and evaporative desalination methods. Among the many high-salt wastewater treatment technologies, evaporative desalination has the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
06 May 2015
Publication
CN104591464A
IPC
C02F9/10; C01D3/06; C01D5/00
CPC
Y02W10/37
Inventors
张继军; 武彦芳