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Circulating cooling water biological treatment method

A technology of circulating cooling water and biological treatment, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. question

Inactive Publication Date: 2014-12-17
付永全 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the existing circulating cooling water treatment such as low concentration factor of circulating cooling water, complex control system and serious environmental pollution, the present invention proposes a circulating cooling water solution with high concentration factor, simple operation, good treatment effect, and low drainage. Biological treatment of circulating cooling water without chemicals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In the circulating cooling water system of a petrochemical refinery in China, the system maintains a water volume of 10,000m 3 , the circulating water volume is 30000m 3 / h, circulation system evaporates 286m 3 / h, the wind blowing loss of the air cooling tower is 31m 3 / h, the system discharge volume is 332m 3 / h, the cycle concentration factor is 1.8, and the surface water is used as the supplementary water of the circulating cooling water system, and the supplementary water volume is 653.4m 3 / h. The main water quality of circulating cooling water is COD Cr 51mg / L, turbidity 12NTU, pH 8.1, calcium hardness 341mg / L, methyl orange alkalinity 189mg / L, conductivity 1879μs / cm, NH 3 -N 5.6m x / L, Cl -1 48mg / L.

[0040] In order to save water, adopt the method of the present invention to process the above circulating cooling water, and increase the system concentration multiple to 3.5 times at the same time, the specific treatment process is as follows:

[0041] P...

Embodiment 2

[0044] In the circulating cooling water system of a coal-fired power plant in China, the system maintains a water volume of 30,000m 3 , the circulating water volume is 90000m 3 / h, circulation system evaporates 1350m 3 / h, the wind blowing loss of the air cooling tower is 70m 3 / h, the sewage discharge of the system is 830m 3 / h, the cycle concentration factor is 2.5, and the river water is used as the supplementary water of the circulating cooling water system, and the supplementary water volume is 2250m 3 / h. The main water quality of circulating cooling water is COD Cr 65mg / L, turbidity 15NTU, pH 7.6, calcium hardness 456mg / L, methyl orange alkalinity 127mg / L, conductivity 2107μs / cm, NH 3 -N 4.3mg / L, Cl -1 22mg / L.

[0045] In order to save water, adopt the method of the present invention to process the above circulating cooling water, and increase the system concentration multiple to 5 times at the same time, the specific treatment process is as follows:

[0046] Pl...

Embodiment 3

[0049] In the circulating cooling water system of an organic chemical plant in China, the system retains a water volume of 6000m 3 , the circulating water volume is 20000m 3 / h, circulation system evaporates 320m 3 / h, the wind blowing loss of the air cooling tower is 16m 3 / h, the system discharge volume is 332m 3 / h, the concentration ratio of circulating water is 3.2, the reclaimed water is reused as supplementary water for the circulating cooling water system, and the quantity of supplementary water is 465m 3 / h. The main water quality of circulating cooling water is COD Cr 115mg / L, turbidity 23NTU, pH 7.8, calcium hardness 665mg / L, methyl orange alkalinity 210mg / L, conductivity 2861μs / cm, NH 3 -N 10.5mg / L, Cl -1 121mg / L. COD of circulating water quality Cr , turbidity, NH 3 -N and other indicators did not meet the requirements of the "Code for Design of Industrial Circulating Cooling Water Treatment" (GB50050-2007).

[0050] In order to make the circulating wate...

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Abstract

The invention discloses a circulating cooling water biological treatment method and belongs to the technical field of industrial water treatment. The method includes the steps of arranging a packed bed in a circulating cooling water tank for providing conditions for implantation of added microorganisms and disposing a circulation pump beside the circulating cooling water tank; adding four kinds of bacteria of yeast, purple non-sulfur bacteria, acetic acid bacteria and bacillus bacteria which are mixed in any proportion to the circulating cooling water tank, wherein the total monthly amount of the bacteria liquid is 0.05-1% of the water in a system; arranging a sludge removal pump in the circulating cooling water tank for regular sludge removal. Furthermore, the invention also provides a method for adjusting the pH of the circulating cooling water system. The circulating cooling water biological treatment method can improve the concentration multiple of the circulating cooling water, reduce the amount of make-up water of the circulating cooling water system, and is fast, easy, effective and environmentally friendly.

Description

technical field [0001] The invention relates to a treatment method for circulating cooling water, in particular to a biological treatment method for increasing the concentration ratio of circulating cooling water and reducing the supplementary water volume of a circulating cooling water system, belonging to the technical field of industrial water treatment. Background technique [0002] my country is a country with serious shortage of water resources, increasing revenue and reducing expenditure, scientific water use is an important measure to alleviate the restriction of my country's economic development due to the lack of water resources. Industrial water accounts for about 30% of the country's water consumption, among which cooling water accounts for about 70% to 80% of industrial water. Saving cooling water is the key to industrial water saving, and circulating water is the most effective measure to save cooling water. The concentration multiple of circulating water is th...

Claims

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Application Information

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IPC IPC(8): C02F3/34
Inventor 付永全刘晓风李东闫志英
Owner 付永全
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