A method for determining the limit distance of co-processing sludge in thermal power plants

Abstract

The invention discloses a method for determining a critical distance of thermal power plant sludge co-processing. The method comprises the following steps: (1) determining unit expense generated in the sludge processing process according to a thermal power plant sludge co-processing technological route and a technical route of building a sludge incineration treatment system in a sewage treatment plant, and based on the unite expense generation condition, calculating total expense W, except for transport cost, generated in the sludge processing process according to the thermal power plant sludge co-processing technological route and the total expense M generated in the sludge processing process according to the technical route of building a sludge incineration treatment system in the sewage treatment plant; (2) calculating the difference value between total expenses, namely H=M-W; and (3) wherein the critical distance S between the sewage treatment plant and the thermal power plant is equal to H / T; and T is the transport unit price of unit sludge between the sewage treatment plant and the thermal power plant. A method for calculating the critical distance is provided for the sewage treatment plant which plans to adopt or has adopted the thermal power plant sludge co-processing, and can be used for designing or verifying whether the sewage treatment plant is suitable for adopting the thermal power plant sludge co-processing technical route or not when economic benefits are ensured.

Description

technical field [0001] The invention relates to a method for determining the limit distance for co-processing sludge in thermal power plants. Specifically, there is a limit distance between the thermal power plant and the sewage treatment plant. From an economic point of view, if the distance exceeds this distance, the co-processing of sewage by the thermal power plant cannot be used. mud. Background technique [0002] In recent years, with the development of my country's social economy and urbanization, urban sewage has been increasing, and how to deal with sludge as a by-product of sewage treatment has become a major problem facing society today. According to statistics, by 2010, there were 2,840 urban sewage treatment plants across the country; statistics in 2013 show that there are now 3,600, and the annual sewage treatment capacity of these sewage treatment plants can reach 34.4 billion cubic meters. And every 10,000 tons of sewage will produce 5 tons of sludge, that i...

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Problems solved by technology

However, if the sewage treatment plant is far away from the thermal power plant, its economic benefits will be limited, and it is not even as good as the sewage treatment plant building its own sludge treatment system or choosing other sludge treatment technology routes. Therefore, how to determine the distance between the sewage treatment plant and the thermal power plant The limit distance is a practical problem that must be solved

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