Steam pressure relief method and device for sludge hydrothermal drying steam pyrolysis reaction kettle

Abstract

The invention relates to a steam pressure relief method for a sludge hydrothermal drying steam pyrolysis reaction kettle, and belongs to the field of solid wastes. The invention provides the pipeline switching and controlling method. The method is characterized in that: a material is prevented from being brought out in the quick pressure relief process by adopting the controlling method, the flowrate of gas in the pressure relief process is reduced by means of change of the diameter of a pressure relief pipe, the pressure relief time and the pressure change of the pressure relief process areadjusted by using the opening degree of a valve, so that when the pressure relief process of the steam pyrolysis reaction kettle is finished, the sludge material can be effectively prevented from being carried, influence on the subsequent process equipment and blockage of the pressure relief pipeline are reduced, and flushing of the pipeline and damage to the valve are reduced.

Description

Technical field [0001] The invention relates to a steam pressure relief method and device for a sludge hydrothermal drying steam pyrolysis reactor, which belongs to the field of solid waste. Background technique [0002] With the rapid development of my country’s economy and the acceleration of urbanization, the construction of sewage treatment plants has increased, and the output of sludge has also increased rapidly; sludge contains concentrated inorganic and organic pollutants, as well as a large number of pathogens and a variety of heavy metal elements. If it is stacked directly without treatment, it will cause serious secondary pollution to the environment. Therefore, the sludge must be properly treated. [0003] The sludge hydrothermal drying technology is a kind of direct contact between steam and sludge to achieve the purpose of breaking the water holding structure of sludge. The heat medium used is saturated steam at 190-200℃. The steam pyrolysis reactor is the key equipmen...

AI Technical Summary

Problems solved by technology

The steam pyrolysis reactor is the key equipment of the sludge hydrothermal drying technology. At present, the steam pyrolysis reactor used for hydrothermal drying in China mainly adopts the horizontal reactor. After a period of closed reaction, the sewage The cracking effect of the water-holding structure of the mud, but it is easy to be carried out by the material during the steam pressure relief process to block the discharge device; thus affecting the use of the equipment

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