Refrigeration air conditioning system utilizing blast furnace gas residual pressure and working method of refrigeration air conditioning system

Abstract

The invention relates to a refrigeration air conditioning system utilizing blast furnace gas surplus pressure and a working method of the refrigeration air conditioning system. An expansion machine iscoaxially connected with an electric generator, the inlet end of the expansion machine is connected with a blast furnace gas pipeline, the outlet end of the expansion machine is connected with a blast furnace gas side inlet end of a blast furnace gas-cooling medium heat exchanger through a pipeline, a blast furnace gas side outlet end of the blast furnace gas-cooling medium heat exchanger is connect with a blast furnace user pipeline, a cooling medium side inlet of the blast furnace gas-cooling medium heat exchanger is connect with a cooling medium pipeline, and a cooling medium side outlet of the blast furnace gas-cooling medium heat exchanger is connect with a cooling medium circulating pump. By reasonably utilizing the surplus pressure and surplus energy of the blast furnace gas, the system has the advantages that energy-saving and low-consumption operation of the refrigeration air-conditioning system of an iron and steel enterprise is realized, the energy utilization efficiency ofthe system is improved, resources are saved, and huge economic benefits and ecological benefits are achieved.

Description

technical field [0001] The invention relates to an air-conditioning system, in particular to a refrigeration and air-conditioning system utilizing residual pressure of blast furnace gas. Background technique [0002] Blast furnace gas is a by-product produced in the process of blast furnace ironmaking, and is one of the important energy sources for iron and steel enterprises. According to statistics, every ton of coke consumed by a blast furnace can produce 3,800 to 4,000 m 3 The full use of blast furnace gas can greatly improve the energy utilization efficiency of iron and steel enterprises. [0003] In the traditional iron-making blast furnace process, the blast furnace top pressure can reach 150-300KPa. At present, iron and steel enterprises mainly use the residual pressure of blast furnace gas to generate electricity through the residual pressure turbine of blast furnace gas. Although this method utilizes the pressure energy of blast furnace gas, However, the cold energ...

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Problems solved by technology

[0005] In view of the fact that the cold energy generated after the blast furnace gas expands and does work in the prior art is not recycled, resulting in energy waste and other deficiencies, the problem to be solved by the present invention is to provide a method that can make full use of the residual pressure of the blast furnace gas furnace top and reduce the steel Energy consumption of enterprise refrigeration and air-conditioning systems Refrigeration and air-conditioning systems and their working methods using residual pressure of blast furnace gas

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