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A recycling treatment system and method for ion-exchanging concentrated brine from cold rolling wastewater

A technology of ion exchange and treatment system, which is applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Shortened service life and other problems, to achieve stable treatment effect, avoid scaling or crystallization, and improve service life

Active Publication Date: 2020-11-17
BAOSHAN IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the effluent water in the process mentioned in this document can also meet the industrial water quality standard, due to the complex composition of concentrated brine, the reverse osmosis device for treating concentrated brine is prone to fouling and clogging, so frequent cleaning will lead to shortened service life, and reverse osmosis The operation and maintenance of the device is relatively complicated, and the operation is also difficult

Method used

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  • A recycling treatment system and method for ion-exchanging concentrated brine from cold rolling wastewater
  • A recycling treatment system and method for ion-exchanging concentrated brine from cold rolling wastewater
  • A recycling treatment system and method for ion-exchanging concentrated brine from cold rolling wastewater

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Effect test

Embodiment 1

[0031] Example 1 The concentrated brine produced when the final wastewater discharged from the cold rolling wastewater station is reused by the ion exchange method is used as the raw water. The quality of the raw water is shown in Table 1 below, and the treatment capacity is 1m 3 / h, the processing flow of embodiment 1 is as figure 1 The processing flow shown.

[0032] Table 1: Raw water quality of process system

[0033]

[0034] The introduced concentrated brine enters the raw water tank 2 after passing through the security filter 1. After adjusting the pH in the raw water tank 2, it enters the low-temperature distillation device 3, and the water output from the low-temperature distillation device 3 enters the product water tank 4, and is sent to the industrial water pipe network through the product water pump 5. . The concentrated solution evaporated at low temperature enters the cooling crystal pool 6; the PP cotton filter core 5um used in the security filter 1. In the...

Embodiment 2

[0044] Example 2 The concentrated brine produced when the final wastewater discharge from the cold rolling wastewater station is reused by ion exchange is used as the raw water. The quality of the raw water is shown in Table 3 below, and the treatment capacity is 1.2m 3 / h, the processing flow of embodiment 2 is as figure 1 The processing flow shown.

[0045] Table 3: Raw water quality of process system

[0046]

[0047] The concentrated brine enters the raw water tank 2 after passing through the security filter 1. After adjusting the pH in the raw water tank 2, it enters the low-temperature distillation device 3, and the water from the low-temperature distillation device 3 enters the product water tank 4, and is sent to the industrial water pipe network through the product water pump 5. The concentrated solution evaporated at low temperature enters the cooling crystal pool 6; the PP cotton filter core 5um used in the security filter 1. In the raw water tank 2, the pH of ...

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Abstract

The invention discloses a reuse treatment system for cold rolling wastewater ion exchange concentrated brine and a treatment method. The system comprises a precision filter, a raw-water box, a low-temperature distillation device, a water producing box, a product water conveying pump and a cooling crystallization pool, the precision filter receives and guides the ion exchange concentrated brine tobe treated, an outlet of the precision filter is connected with the raw-water box, an outlet of the raw-water box is connected with the low-temperature distillation device, and the raw-water box is also connected with a NaOH adding pipeline; the low-temperature distillation device is a negative pressure environment, the outlet of the low-temperature distillation device is connected with the waterproducing box, and treated reusable water is output from the water producing box through the product water conveying pump and conveyed to an industrial water pipe net; and an outlet of a material outlet pump of the low-temperature distillation device is connected with the cooling crystallization pool. According to the invention, the treatment effects are stable, the evaporation speed is high, theconcentration specific gravity is large, the system is salting-out resistant and anti-scaling, and prevents coking, pollutants such as organic matter, SS, and saline matter in wastewater can be removed through crystallization, and zero discharge of the concentrated brine is realized; and costs are low, the degree of automation is high, and operation is simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a system and process technology for reusing cold-rolling wastewater ion-exchanged concentrated brine. Background technique [0002] According to the specific requirements of the country's "Iron and Steel Industry Development Policy" on the new water index, the new water consumption index per ton of steel in the iron and steel complex will be 6m3 / t before 2020. Among them, it is required that the new water consumption index per ton of steel for large-scale enterprises with an annual output of 10 million tons of steel and above shall be ≤4.0m3 / t; the new water consumption index per ton of steel for established iron and steel complexes with an annual output of 10 million tons of steel and above shall be ≤5.0m3 / t. Therefore, the advanced treatment and recycling of wastewater will be the development trend of wastewater treatment in the future. [0003] There are many kinds of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F103/16
Inventor 殷玫婕吴昊秦志浩施杰陈砚秋倪建春宋艳丽杨倩宇
Owner BAOSHAN IRON & STEEL CO LTD
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