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Method and device for degassing acidic water

A degassing device and acidic water technology, applied in chemical instruments and methods, degassed water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as potential safety hazards, resource loss, and inability to effectively remove them, and achieve an The effect of small floor area, high degassing efficiency and simple operation

Active Publication Date: 2014-06-11
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the sour water degassing tank is usually placed horizontally and elevated, and the principle adopted is flash evaporation-gravity sedimentation separation technology. Since the gas dissolved under the operating pressure of the degassing tank cannot be effectively removed by flash evaporation, the flash evaporation The tiny air bubbles dispersed in the separated water cannot be effectively removed by gravity settling. After entering the downstream acidic water purification tank, this part of the gas will also precipitate on the top of the tank due to the pressure drop and the prolonged settling time, causing safety hazards and resource loss. Therefore, Requires more efficient sour water degassing technology for treatment

Method used

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  • Method and device for degassing acidic water
  • Method and device for degassing acidic water
  • Method and device for degassing acidic water

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Embodiment 1

[0042] see figure 1 , is the schematic structural view of the first embodiment of the acid degassing device of the present invention, the device includes a flash tank 1 and a cyclone centrifugal degassing device 2 communicated therewith, and the flash tank 1 includes a shell 12, an acidic water inlet 11, and a gas phase outlet 13, the cyclone centrifugal degassing device 2 includes a shell 22, a plurality of aforementioned cyclone centrifugal degassing core tubes 21 arranged in the shell 22, and a liquid phase outlet is arranged at the bottom of the cyclone centrifugal degassing device 2 twenty three. The flash tank 1 and the cyclone centrifugal degassing device 2 communicate internally to form a closed cavity, and the closed cavity is provided with an acidic water inlet 11 , a liquid phase outlet 23 and a gas phase outlet 13 .

[0043] The process flow of sour water stripping in refineries is usually realized through the following steps: the gas-carrying pressurized sour wat...

Embodiment 2

[0056] see image 3 , is a schematic structural view of the acid degassing device according to the second embodiment of the present invention, the device includes a cyclone centrifugal degassing device 2, and the cyclone centrifugal degassing device 2 includes a shell 22, and a plurality of the aforementioned cyclones arranged in the shell 22 flow centrifugal degassing core tube 21, cyclone centrifugal degassing equipment 2 housing 22 is also provided with an inlet, the bottom of the housing 22 is provided with a liquid phase outlet 23, the upper part of the housing 22 is also provided with a liquid level gauge 25, the top of the housing 22 A swirl gas-liquid separation core tube and a gas phase outlet 26 are provided.

[0057] The acidic water treatment process flow of the hydrogenation unit is usually realized through the following steps: the acidic water under pressure carrying gas enters the cold low-pressure separator for three-phase sedimentation and separation, the sepa...

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Abstract

The invention relates to a method and a device for degassing acidic water. The method comprises the following steps of: separating gas dissolved in the acidic water by a decompression method, wherein the separated gas is divided into a gas phase and a liquid phase by a gravity subsiding method; separating gas still dissolved in the acidic water and part of small bubble under the pressure by a whirl centrifugal degassing method, wherein the gas dissolved in the acidic water is separated out as a result of reduction of the partial pressure of the pressure gradient field based on the pressure gradient and centrifuge filed of whirl centrifugal degassing equipment, and further separating the separated gas and small bubbles under the centrifuge field; and as for the gas phase part, removing the carried liquid drop by hydrocyclone separation or agglutination separation. By using the method and device for degassing acidic water, liquid in the gas is effectively removed, and the shortage of the conventional acidic water degassing tanks is overcome.

Description

technical field [0001] The invention relates to a method and a device for degassing acidic water, in particular to a method and a device for degassing acidic water by using flash evaporation-centrifugal coupling technology. Background technique [0002] During crude oil processing, part of the sulfur and nitrogen in the crude oil enters the acidic water discharged from the crude oil processing unit in the form of hydrogen sulfide and ammonia. Subsequently, the acidic water stripping unit pre-treats acidic water from atmospheric and vacuum distillation, catalytic cracking, delayed coking, hydrocracking, hydrofinishing and sulfur recovery, so that the treated purified water can be reused in upstream processes device, or to meet the water quality requirements of the sewage treatment plant, the hydrogen sulfide and ammonia in the acidic water are removed and recovered by stripping, which not only purifies the acidic water, but also reduces the processing loss of the enterprise. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F1/06C02F1/38C02F1/20
Inventor 杨强吕文杰许萧阎超汪华林马良吴瑞豪
Owner EAST CHINA UNIV OF SCI & TECH