Degassing and deodorizing method for acetylene apparatus carbon black water

Abstract

The invention discloses a degassing and deodorizing method for acetylene apparatus carbon black water. The degassing and deodorizing method comprises that (1) to-be-treated carbon black water is pressurized, the pressured carbon black water enters a gas stripping tower, and is sprayed on the middle-upper portion of the gas stripping tower, and gas stripping gas enters the tower from the middle-lower portion of the gas stripping tower, and is concentrated tail gas from a concentration section; (2) carbon black water recycled by an acetylene apparatus enters the water spraying section on the topportion of the gas stripping tower, the stripped gas stripping gas is subjected to spray cooling with the carbon black water, and the cooled gas stripping gas enters the middle-lower portion of a vacuum pump sucking tank from the top portion of the gas stripping tower; (3) the carbon black water is sprayed downward from the upper portion of the vacuum pump sucking tank, the stripped gas strippinggas discharged from the top portion of the gas stripping tower is further cooled in the tank, and the gas stripping gas discharged from the tank top is conveyed to a cracking gas total pipe by a vacuum pump; and (4) the carbon black water discharged from the bottom portion of the vacuum pump sucking tank is introduced into the tower kettle of the gas stripping tower, the discharged carbon black water and the carbon black water degassed at the tower kettle are pressurized, and the pressurized carbon black water is conveyed into a subsequent carbon black water groove so as to be further treated. According to the present invention, with the method, the acetylene apparatus carbon black water degassing effect can be improved, and the environmental protection problem can be solved.

Description

technical field [0001] The invention relates to the technical field of natural gas, in particular to a method for degassing and deodorizing carbon black water in an acetylene plant. Background technique [0002] In the partial oxidation of natural gas to acetylene process, the main reaction in the acetylene furnace is the decomposition of natural gas to generate acetylene and hydrogen. This reaction needs to be completed in a very short time. If the time is too long, the acetylene generated will continue to decompose into carbon black and hydrogen. In order to effectively control the reaction time, the water spray quenching method is adopted to terminate the reaction in time when the acetylene reaches the highest yield. The spray water will wash off the carbon black in the pyrolysis gas to form carbon black water. While the natural gas is decomposed, some other side reactions will occur in the acetylene furnace, and the by-products include carbon monoxide, carbon dioxide, hy...

AI Technical Summary

Problems solved by technology

Patent (publication number CN102241421A) provides a kind of removal method of dissolved gas in carbon black water, and this method adopts the tail gas of thickening as stripping gas, removes the gas such as acetylene dissolved in carbon black water in degassing tank, adopts The above-mentioned invention technology has little influence on the overall process, lower operating cost, and the degassing effect is improved compared with natural desorption, but the stripping gas in the degassing tank is not fully contacted with the carbon black water, and there is still relatively high carbon black water in the degassed carbon black water. Many cracked gas components, especially the diacetylene component, are difficult to remove, and a large amount of waste gas still emerges in the subsequent carbon black water treatment section, emitting odor, polluting the environment, and failing to meet the increasingly stringent environmental protection standards.

Images