Soft measurement and optimization control method for chlorine concentration in black water of coal water slurry gasifying device

Abstract

The invention relates to a soft measurement and black water-emission optimization control method for a chlorine concentration in black water emission of a coal water slurry gasifying device, which comprises the following steps of: selecting a plurality of measurable process state auxiliary variables as the input variables of a soft measurement model, wherein the measurable process state auxiliaryvariables include an artificial analysis value of the chlorine concentration at the first moment, the total flow of the coal water slurry and emission amount of waste water-removed black water (also called sewage) before the current moment; and simultaneously outputting the chlorine concentration in the black water at the current moment as an output of the soft measurement model. Data pretreatment is carried out by collecting running data of actual industrial devices and the established soft measurement model is input, thereby realizing soft measurement on the chlorine concentration in black water emission of the coal water slurry gasifying device. Meanwhile, based on the model, the method can realize emission optimization control of the black water to meet the chlorine content in the black water emission at next moment, and on the basis of meeting the requirement of environmental protection, water resources are saved. The soft measurement technique can provide effective chlorine concentration information for the coal water slurry gasifying device to guide optimization running operation in a gasifying process so that the replenishing amount of purified water and the emission amount of wastewater-removed black water are controlled.

Description

technical field [0001] The invention relates to a soft sensing method in the field of energy industry and chemical engineering. Specifically, it is a soft measurement of chlorine concentration in the black water discharge of a coal-water slurry gasification device and an optimal control method for black water discharge. Background technique [0002] Coal is the most abundant fossil fuel in the world. my country uses coal as the main energy source. Realizing the efficient and clean comprehensive utilization of coal is of great significance to the development of the national economy and the protection of the ecological environment. Coal gasification technology is an important method to realize the clean utilization of coal. my country's entrained bed coal gasification was completely monopolized by the US GE gasification technology (formerly Texaco technology) in the early period of the "Tenth Five-Year Plan". With the support of the national science and technology plan, the ...

AI Technical Summary

Problems solved by technology

This measurement method can only measure the concentration of chlorine radicals at a certain moment, and cannot obtain the real-time chlorine radical concentration of the system, and it is only detected once every 24 hours, and the time interval is too long. Large changes cannot be found, and the long-term corrosion of equipment will be very serious

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