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Near-zero-emission treatment system and technology for ternary precursor material production wastewater

A near-zero emission and treatment system technology, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve problems such as high operating cost, long treatment process, and large environmental impact, and achieve heat balance Effect

Active Publication Date: 2019-02-12
广州新普利节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In process 1, in addition to the high operating cost of the independent stripping and deamination process, the discharged wastewater also contains high concentrations of sodium sulfate, which has a great impact on the environment; process 2, in addition to the MVR evaporation crystallization process, also includes an independent Stripping deamination process and turbid condensate water reverse osmosis membrane treatment process, the treatment process is long, the process is complicated, and the operation cost is high at the same time

Method used

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  • Near-zero-emission treatment system and technology for ternary precursor material production wastewater
  • Near-zero-emission treatment system and technology for ternary precursor material production wastewater
  • Near-zero-emission treatment system and technology for ternary precursor material production wastewater

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Effect test

Embodiment 1

[0041] The near-zero discharge treatment system of the ternary precursor material production wastewater in this embodiment is as follows: figure 1 shown, including:

[0042] Wastewater storage tank 1, used to store ternary precursor mother liquor wastewater (washing concentrated water is merged into mother liquor wastewater);

[0043] The preheater includes a primary preheater 21 and a secondary preheater 22. The primary preheater 21 and the secondary preheater 22 are sequentially connected after the waste water storage tank 1, and the waste water flowing through the preheater 2 is processed. Heating to raise the temperature; wherein the primary preheater 21 and the secondary preheater 22 are heat transfer heat exchangers, and the hot water ends of the primary preheater 21 and the secondary preheater 22 are respectively connected to a condensed water storage Tank 23, two condensed water storage tanks 23 are respectively connected with the heaters in the MVR primary evaporatio...

Embodiment 2

[0053] A ternary precursor material factory 2m 3 / h Near-zero discharge treatment process of ternary precursor wastewater.

[0054] Table 1 Raw water quality data

[0055] main ingredient

Kg / h

mg / L

Remark

Ni

0.9

450

co

0.3

150

mn

0.28

140

NH 4+

14.4

7200

NH 3 Convert to NH 4+

Na 2 SO 4

236

118000

Density ρ

1020Kg / m 3

Flow Q

2m 3 / h

pH

10-12

temperature

30℃

[0056] 1) The wastewater from the production of the ternary precursor is sent to the primary preheater 21 and the secondary preheater 22, and the temperature rises to 85°C after preheating;

[0057] 2) Send the twice preheated waste water into the sealed heavy metal sedimentation and clarification tank 31, add sodium hydroxide solution to the waste water, control the pH of the waste water>12, and decomplex the heavy metal comp...

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Abstract

The invention discloses a near-zero-emission treatment system and technology for ternary precursor material production wastewater. Heavy metal is recycled through adopting a precipitation method; water, ammonia gas and sodium sulfate in the wastewater are recycled through adopting a two-grade method MVR (Mechanical Vapor Recompression) technology. The ammonia gas which is volatilized and escaped in wastewater temperature rising, and heavy metal sedimentation and clarification procedures is recycled for production; water steam and ammonia gas are produced in an MVR first-grade evaporation, concentration and separation process; when condensed water is recycled, the ammonia gas is recycled and is used for producing the ammonia gas; an integrated technology for recycling the water and the ammonia gas at the same time is used for replacing an existing single-procedure high-energy-consumption steam stripping process recycling technology of the steam, so that treatment procedures are reducedand the operation cost is reduced; a two-grade MVR evaporation and crystallization technology is used for recycling anhydrous sodium sulfate and the condensed water. The near-zero-emission treatment system and technology have the advantages of protecting the environment, reducing the emission of high-salt-content wastewater, reducing the recycling treatment cost of the wastewater, changing wastesinto valuable things, generating economic benefits and realizing near-zero-emission treatment of the wastewater.

Description

technical field [0001] The invention relates to the field of industrial production sewage treatment, in particular to process wastewater treatment for producing ternary precursor material nickel hydroxide cobalt manganese by chemical method, and is a near-zero discharge treatment system and process for ternary precursor material production wastewater. Background technique [0002] At present, the ternary precursor material nickel hydroxide cobalt manganese (ie NCM material, chemical formula Ni x co y mn z (OH) 2 , the main models are 811, 622, 523, etc.) for the production of cathode materials for lithium batteries. The batteries produced with this cathode material have excellent performance and thus have good development prospects. [0003] Among the production methods of various ternary precursor materials, the materials produced by the complex co-precipitation chemical production process have the highest performance and are more widely used. The main process flow is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D5/16C01C1/02C02F101/20C02F101/16C02F103/34
CPCC01C1/022C01D5/16C01P2006/80C02F1/048C02F1/444C02F1/62C02F1/66C02F9/00C02F2001/007C02F2101/16C02F2101/20C02F2103/34C02F2301/08
Inventor 黄莹莹莫明光杨恒君谭子斌覃涛
Owner 广州新普利节能环保科技有限公司
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