Method for comprehensive treatment and utilization of industrial water

A comprehensive treatment and industrial water technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the waste of water resources, increase operating costs, and increase exchange resin exchange Load and other issues, to achieve the effect of reducing sewage discharge, saving exchange capacity load, and improving water recovery rate

Inactive Publication Date: 2003-10-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, this method has the following disadvantages: because the salt content of the concentrated solution after the source water is treated by reverse osmosis is concentrated, such as groundwater as the source water, the salt content in the concentrated solution has reached 1500mgL -1 , and then undergo ion exchange desalination treatment, which will significantly increase the exchange load of the exchange resin, and the operating cost will increase more; in addition, in this method, 15%-25% of the reverse osmosis concentrate will eventually be discharged from the system in the form of waste water, resulting in water pollution. waste of resources

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  • Method for comprehensive treatment and utilization of industrial water
  • Method for comprehensive treatment and utilization of industrial water

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Embodiment 1

[0013] Example 1: A domestic petrochemical refinery uses fresh surface water as the source water for steam boiler feed water preparation and supplementary water for the circulating cooling water system. The average source water quality is: calcium hard 55.5mgL -1 , Alkalinity 85mgL -1 , Turbidity 105mgL -1 , conductance 875us / cm, pH7.05, total dissolved solids 435mgL -1 , the amount of water used to supplement the steam boiler feed water and circulating water system due to evaporation and air cooling tower loss is 295m respectively 3 h -1 and 210m 3 h -1 . At present, pretreatment, reverse osmosis membrane method and ion exchange combined process are used to prepare steam boiler feed water. Since the source water contains high concentrations of calcium and magnesium ions, the reverse osmosis unit can only be operated at a low water recovery rate of 60%. , so that the source water required for the process reaches 490m 3 h -1 , the reverse osmosis concentrate can only be...

Embodiment 2

[0015] Embodiment 2: the source water in embodiment 1 is replaced surface water by groundwater, and the average groundwater source water quality is: calcium hard 200mgL -1 , Alkalinity 250mgL -1 , Turbidity 0.2mgL -1 , conductance 930us / cm, pH7.7, total dissolved solids 465mgL -1 , using the method provided by the present invention, in the preparation process of steam boiler feed water, the concentrated solution treated by the reverse osmosis unit is subjected to sulfonated coal softening treatment, and then partly circulated back to the reverse osmosis influent water for circulation treatment, and enters after pretreatment The source water treated by the reverse osmosis unit is 367m 3 h -1 , the average permeation water production is 295m 3 h -1 , reverse osmosis process concentrate circulation treatment capacity 144m 3 h -1 , which circulates back to reverse osmosis feed water 72m 3 h -1 , the system discharges 72m 3 h -1 , according to the calculation of the solu...

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Abstract

The present invention aims at raising the utilization rate of industrial water. The scheme of the present invention includes reverse osmose and ion exchange combining desalting process to prepare water for steam boiler. Of the concentrated liquid of reverse osmose after being softened, one part is returned to reverse osmose treatment to raise the water recovering rate while the other part is reverse osmose treated with the permeated liquid after being treated is used to replace fresh water to replenish circular water. This can improve water quality in circular water system while saving fresh water consumption. The method of the present invention can raise water utilizing rate and is suitable for plants with both steam boiler and circular cooling water system.

Description

technical field [0001] The invention relates to a treatment and utilization method of industrial water, which is mainly used for reducing the consumption of fresh water in the industrial production process, especially for reducing the consumption of fresh water used as system supplementary water in the circulating cooling water system of the industrial production process. The invention belongs to the technical field of industrial water-saving treatment. Background technique [0002] The water consumption in the industrial production process is huge, accounting for more than 20% of the current total water consumption, and with the rapid development of industry, the share of industrial water will continue to increase. Due to the increasing shortage of water resources, water saving Water conservation especially in industrial production processes has become an important task. The analysis of water used in the industrial production process shows that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F9/04C02F9/08
Inventor 郭宏山
Owner CHINA PETROLEUM & CHEM CORP
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