Method for removing dissolved gases from carbon black water
A technology for dissolving gas and carbon black, which is used in degassed water/sewage treatment, hydrocarbon cracking to produce hydrocarbons, organic chemistry, etc. It can solve the problems of dangerous operation of air separation units, production of carbon black, environmental pollution, etc., and reduce flammable gas. , the effect of reducing emissions and reducing environmental pollution
Active Publication Date: 2014-01-01
CHINA PETROCHEMICAL CORP +1
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Problems solved by technology
The rising air bubbles will roll up the carbon black settled on the water surface in the washing tank, which will generate carbon black dust and cause environmental pollution; if the concentration is too high, it will cause danger to the operation of the air separation device in the oxygen workshop
Method used
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[0023] The present invention will be further described below in conjunction with the accompanying drawings.
[0024] A kind of method of removing dissolved gas in carbon black water of the present invention, see figure 2 ,Specific steps are as follows:
[0025] The first step is to close the boundary valve 1 on the stripping gas pipeline of the concentrated tail gas located in the concentration device; close the concentrated tail gas inlet valve 8 of the degassing tank; use nitrogen with a pressure of 0.5MPa to inert the collection main pipe and degas tank 10;
[0026] The second step is to open the passage of the enriched tail gas from the enrichment device to the enriched tail gas inlet valve 8 of the degassing tank 10, and open the first air valve 7 before the enriched tail gas inlet valve to discharge gas to the air;
[0027] The third step is to open the second air valve 3 connected with the leather tube behind the boundary valve 1, and introduce nitrogen with a pressu...
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The invention relates to a method for removing dissolved gases from carbon black water. The method is characterized by using the concentration exhaust gas generated by a concentration device during an acetylene preparation process utilizing partial oxidation of natural gas as the stripping gas for removing dissolved gases from carbon black water, and is performed by firstly reducing the pressure of the concentration exhaust gas to less than 13.5 kPa and adjusting the flow to 150-300 m<3> / h, then introducing the concentration exhaust gas into a carbon black water tank for removing the dissolved gases from the carbon black water, and returning the removed gases to the concentration device through a cracking gas main pipe. In the method, the concentration exhaust gas generated by the concentration device is selected as the stripping gas, the influence on the whole process is minimized and the operation cost of the overall device is lowered; a quick closing valve under pressure interlock control is arranged to cut off the high-pressure exhaust gas entering a degassing tank, a safety valve is simultaneously arranged to empty part of the concentration exhaust gas to a torch for burning, thus guaranteeing safe, stable and long-term operation of the method; the emission of combustible gases to the environment is reduced, thus contributes to environmental protection; and economic benefits are improved by recycling acetylene.
Description
technical field [0001] The invention relates to a method for treating carbon black water produced in the process of producing acetylene by partial oxidation of natural gas, in particular to a method for removing dissolved gas in carbon black water. Background technique [0002] In the process of partial oxidation of natural gas to acetylene, the dissolved gas in the carbon black water is naturally desorbed in the degassing tank, so the desorption effect is poor, and part of the dissolved gas is taken to the downstream device to cause environmental pollution and bring safety hazards. Therefore, the removal of dissolved gas in carbon black water has always been an important topic to study, discuss, and find a solution. Since the carbon black water discharged from the bottom of the acetylene furnace, electric filter, and cooling tower contains some acetylene, and the solubility of acetylene in water is quite large, it is very important how to make the carbon black water only co...
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IPC IPC(8): C02F1/20C07C11/24C07C4/02
Inventor 郑岩王峰
Owner CHINA PETROCHEMICAL CORP