Acidic water treatment device and treatment process based on device

Abstract

The invention provides an acidic water treatment device and a treatment process based on the device. A gas outlet of a raw material water tank of the device is connected with a gas inlet of a water scrubber; a gas outlet of the water washing tower is connected with a gas inlet of the alkaline washing tower; a gas outlet of the alkaline washing tower is connected with a gas inlet of the heating combustion furnace; a water-sealed tank A and a water-sealed tank B are mounted at the top of the raw material water tank; an air leakage pipe A and an air leakage pipe B are arranged at the middle upper part of the raw material water tank, the air leakage pipe A is connected with the water-sealed tank A, and the air leakage pipe B is connected with the water-sealed tank B; a deflation pipe A is arranged in the water-sealed tank A, and a deflation pipe B is arranged in the water-sealed tank B; and the raw material water tank is made of 304 stainless steel. When the treatment device is used for treating acidic water, the purpose of safe, stable and long-period operation can be achieved; in addition, by combining with an acidic water treatment process, the acidic water can meet the emission standard after one-time treatment, and pollution of peculiar smell gas to the environment can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of acidic water treatment, in particular to an acidic water treatment device and a treatment process based on the device. Background technique [0002] Acidic water is a common industrial waste water in the field of sulfur-containing crude oil and coal tar, and there is a large amount of output in the atmospheric and vacuum, catalytic cracking, delayed coking and hydrofining processes in the processing process; acidic water contains Corrosive gases such as hydrogen sulfide and ammonia gas are highly corrosive to the storage tank during the storage of acidic water, which leads to severe tests on the safety and long-term stability of acidic water treatment; at the same time, the high oil content in acidic water, It is not conducive to the normal operation of the acidic water treatment system and affects the long-term operation of the acidic water treatment system; in addition, the presence of volatile gases in...

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Problems solved by technology

[0002]Acidic water is a common industrial wastewater in the field of sulfur-containing crude oil and coal tar. There is a large amount of output in the hydrofining process; acidic water contains corrosive gases such as hydrogen sulfide and ammonia, which are highly corrosive to the storage tank during the storage of acidic water, resulting in the safety and long-term stability of acidic water treatment At the same time, the high oil content in acidic water is not conducive to the normal operation of the acidic water treatment system, affecting the long-term operation of the acidic water treatment system; The surrounding environment will produce unpredictable hazards

[0003] At present, in order to reduce the corrosion of acid water storage tanks, the inner wall of acid water storage tanks is usually coated with anti-corrosion materials, but as the number of equipment reuse increases , the coating is prone to bubbling, damage, and falling off, which leads to potential safety hazards in the device; nano-ceramic inner wall anti-corrosion technology is a relatively advanced technology, but it has problems such as difficult construction and difficult construction quality assurance, resulting in difficult anti-corrosion effects. It is estimated that the removal methods of oil phase in acidic water mainly include natural sedimentation method, inclined plate oil separation method, chemical demulsification sedimentation method, chemical demulsification cyclone method, etc. These treatment methods are complicated and cannot flexibly deal with different compositions of upstream Acidic water makes the treatment of oily acidic water more difficult, which is not conducive to the smooth progress of acidic water treatment; since acidic water treatment and upstream production are in the same line, when the acidic water device fails to operate normally, it will cause upstream It is difficult to process crude oil or coal tar, which affects the smooth progress of production

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