Process for treating cyclic cooling water

A technology of circulating cooling water and treatment methods, which is applied in the direction of osmosis/dialysis water/sewage treatment, flocculation/sedimentation water/sewage treatment, separation methods, etc., which can solve the problem of not fundamentally increasing the concentration multiple of the circulating cooling system and reducing the cooling cycle The water system supplements water volume, one-time investment and large area, and achieves good environmental and social benefits, ideal economy, and no consumption of chemicals.

Inactive Publication Date: 2003-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US6086772 (EP0893412) discloses a method for preventing biological contamination of circulating water in the cooling water system. An ozone generator is placed in the cooling water circulation system, and high-concentration ozone is generated by the ozone generator to replace bactericides such as chlorine, etc., to complete the cooling cycle. The bactericidal effect of circulating water biological and microbial pollution in the water system, but this method only improves the problems caused by biological pollution in the circulating water quality, and is effective for the deterioration of the circulating water quality caused by suspended solids and total solids in the circulating water. The problem basically does not work, and it is impossible to fundamentally increase the concentration multiple of the circulating cooling system and reduce the supplementary water volume of the cooling circulating water system
Chinese patents ZL93108366.4, 93218891 and 94202193 disclose a treatment method and device for cooling water in an air-conditioning system. The method and device fix a filter with a functional carbon fiber treatment material as the main body in the circulating cooling water of the air-conditioning system. In the process, let the water pass through this filter naturally, because this material can reduce the potential of water, consume dissolved oxygen in water, and absorb Ca in water. 2+ , Mg 2+ Therefore, it plays a role in anti-corrosion, anti-scaling and inhibiting the growth of microorganisms for circulating water. Compared with chemical treatment, it has high efficiency, saves manpower and material resources, and maintains the stability of circulating water quality. However, this method is in During the implementation process, for the open circulating cooling system, the amount of processing materials is required to be 0.033-0.050% (weight) of the total circulating water volume. If the circulating water volume is tens of thousands of m 3 In a large-scale water circulation system above / h, the loading capacity of this material will reach several tons at one time. Since the carbon fiber material is very light and expensive, the one-time investment and floor space of the device are large, and the saturated regeneration of this material requires It consumes a lot of clean water and produces a lot of sewage, so it is difficult to realize the application in large-scale circulating cooling water treatment system

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  • Process for treating cyclic cooling water
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Embodiment 1

[0015] In the circulating cooling water system of a petrochemical refinery in China, the total amount of circulating water is 20858m 3 h -1 , the evaporation loss of the circulation system is 188m 3 h -1 , the wind blowing loss of the air-cooled tower is 22m 3 h -1 , the system discharge volume is 223m 3 h -1, the cycle concentration factor is 1.77, the surface water is used as the supplementary water of the circulating cooling water system, and the supplementary water volume is 433m 3 h -1 . The main water quality of circulating water is: calcium hard 102mgL -1 , Alkalinity 115mgL -1 , Turbidity 15mgL -1 , conductance 1590mgL -1 , Cl-150mgL -1 , pH8.2.

[0016] Adopt the present invention to carry out fiber filtration and low-pressure reverse osmosis treatment to the effluent of the side filter tank of the circulating cooling system, and the treated water volume is 206m 3 h -1 , the fiber filter is filled with fiber bundles, and the filter depth of the control ...

Embodiment 2

[0019] In the circulating cooling water system of a petrochemical refinery in China, the total circulating water is 42800m 3 h -1 , circulation system evaporation loss 652m 3 h -1 , the wind blowing loss of the air cooling tower is 40m 3 h -1 , the system discharge volume is 504m 3 h -1 , control the cycle concentration multiple of 2.2, use surface water as the supplementary water of the circulating cooling water system, and the supplementary water volume is 1196m 3 h -1 , the main water quality of circulating water is: calcium hard 60.3mgL -1 , Alkalinity 58.8mgL -1 , Turbidity 13mgL -1 , conductance 386mgL -1 , Cl-55mgL -1 , pH7.99.

[0020] Adopt the present invention to carry out fiber filtration and low-pressure reverse osmosis treatment to the effluent of the side filter tank of the circulating cooling system, and the treated water volume is 422m 3 h -1 , the fiber filter is filled with fiber bundles, and the filter depth of the control line is 18mh -1 , u...

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Abstract

The present invention relates to the circular cooling water treating method and belongs to the field of industrial water saving technology. Available circular cooling water deep treating method has poor economical performance. The present invention is that to available circular cooling water system with relatively low concentration multiple fiber filtering and low pressure reverse osmose treating apparatus following the side filtering line is increased, 0.2-2 % of circular water is led out for coarse filtering and fiber filtering treatment, and filtered water is reverse osmose treated, the osmosed liquid is returned to the cooling water system, and the exhausted concentrated liquid accounting for 15-25 % of treated water amount is exhausted and treated. The present invention may be used in circular cooling water system with low concentration multiple.

Description

technical field [0001] The invention relates to a treatment method for circulating cooling water, in particular to a method for reducing the amount of supplementary water in a circulating cooling water system, especially a method for reducing the amount of supplementary water in a circulating cooling water system with a low concentration factor. The invention belongs to the technical field of industrial water saving. Background technique [0002] At present, most of the circulating cooling water systems in my country adopt an open structure. During the recycling process of the circulating cooling water, on the one hand, a large amount of dust and other pollutants contained in the air enter the circulating cooling water system, which increases the concentration of dissolved oxygen in the circulating water. The accumulation of suspended solids and the reproduction of microorganisms cause biological slime hazards; on the other hand, due to evaporation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D24/02B01D39/06B01D39/16C02F1/44C02F1/52
Inventor 郭宏山
Owner CHINA PETROLEUM & CHEM CORP
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