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Circulating water processing method

A treatment method and circulating water technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of long treatment cycle and unstable treatment effect, and achieve easy operation , Avoid equipment corrosion, low operating costs

Active Publication Date: 2012-11-21
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0008] The purpose of the invention of the present invention is to overcome the long treatment period of the circulating water treatment method containing leaked oil in the industrial circulating water system of the prior art, and the treatment effect is easily affected by the growth, reproduction and degradation of the bacteria with oil degradation performance in the circulating water. The influence of metabolic environment and rate, and the defect of unstable treatment effect, provide a fast, good treatment effect, and no need for large-scale drainage and replenishment of circulating water treatment method

Method used

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Embodiment 1

[0051] This embodiment is used to illustrate the treatment method of circulating water provided by the present invention.

[0052] Such as figure 1 As shown, a bypass is installed on the right side of the tower pool 10 at the bottom of the cooling tower 3, and the bypass includes a pipeline and an oil-water separator 9 (swirl oil-water separator), and after realizing oil-water separation, circulating water is reintroduced in the tower pool 10 (introduce the treated circulating water near the water outlet of the suction well 4), the treatment capacity of the bypass equipment is 200L / h. The water pump 1 supplies the circulating water in the suction well 4 to the water user 2, and the circulating water after heat exchange in the cooling tower 3 re-enters the tower pool 10; mg / L. After the circulating water system runs for 100 hours, add gasoline, diesel oil and residual oil mixed oil product 3000mg / L (the weight ratio of gasoline, diesel oil and residual oil is 2: 2: 1) to the ...

Embodiment 2

[0055] This embodiment is used to illustrate the treatment method of circulating water provided by the present invention.

[0056] The circulating water is processed according to the method of Example 1, the difference is that the oil-water separator 9 is a dissolved air flotation machine, and after running for 100h, the mixed oil product 200mg / L (diesel oil and residue) is added to the circulating water in the circulating water. The weight ratio of the oil is 1:1), simulate the situation of oil leakage at the end of the water user, and close the filter 5. After adding the mixed oil, the turbidity of the circulating water increases, and the water surface can be covered with yellow-brown oil stains. The cooling tower pool , flowmeter, etc. have uneven adhesion of oil. After 12h, add degreasing agent (10 grams of dodecyldimethylbenzyl ammonium chloride, 10 grams of tetradecyldimethylbenzyl ammonium chloride, 15 grams of N, N-dimethylbenzyl ammonium chloride, Methyldodecylamine,...

Embodiment 3

[0059] This embodiment is used to illustrate the treatment method of circulating water provided by the present invention.

[0060] Process circulating water according to the method of embodiment 1, difference is:

[0061] The degreaser is a mixture of 20 grams of dodecyldimethylbenzyl ammonium chloride, 20 grams of N, N-dimethyldodecylamine, 40 grams of ethanol myristylamide and 20 grams of water.

[0062] In addition, when the turbidity of the circulating water no longer increases after adding the degreasing agent, part of the circulating water is drawn out through the bypass (the drawn amount accounts for 10% by weight of the total circulating water), and at 35°C, add Flocculant 8 (sodium carboxymethyl cellulose), and open the cyclone oil-water separator 9 for oil-water separation, it can be seen that the oil outlet of the cyclone separator flows out yellow-black oil, and the amount of flocculant and the flocculation time make the oil-water separation The turbidity of the c...

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Abstract

The invention provides a circulating water processing method. The circulating water contains oil substances. The method comprises the following steps: 1, adding an oil removal agent to the circulating water and allowing a circulating water system to run for a predetermined period of time to peel the oil substances adhered to the inner wall of the circulating water system, and dispersing the peeled oil substances and other oil substances existing in the system in water to obtain the oil substances dispersed circulating water; 2, continuously or intermittently drawing parts of the oil substances dispersed circulating water out from the circulating water system, and adding a flocculating agent to the drawn-out circulating water to flocculate the oil substances dispersed in the circulating water from a water phase; and 3, carrying out oil-water separation of the flocculated circulating water, and returning the oil-water separated circulating water to the circulating water system. The circulating water processing method which organically combines oil removal and oil discharge enables leaked oil products to be rapidly and effectively discharged from the circulating water system, the stable running of the circulating water system to be realized in a case that the industrial circulating water system leaks the oil products, and the quality of the circulating water to be simultaneously improved.

Description

technical field [0001] The invention relates to a treatment method for circulating water. Background technique [0002] The circulating water system of refining and chemical enterprises can provide cooling water for multiple sets of process devices at the same time. When oil material leakage occurs on the process side, it is difficult for the technical personnel of the enterprise to accurately judge and quickly switch the leaking water cooler. At this time, the circulating water treatment is the enterprise problems faced. When oil leakage occurs in the circulating water system, the corrosion and scaling of the equipment will intensify, and a large amount of slime will grow. It is difficult to achieve stable operation of the circulating water system by using conventional water treatment processes, especially when wax oil, heavy oil and other oil products leak , the pollution of the circulating water system is difficult to eliminate in a short period of time. Under normal ci...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 傅晓萍李本高
Owner CHINA PETROLEUM & CHEM CORP
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