Airtight submerged arc furnace gas power generation method and device

Abstract

An airtight submerged arc furnace gas power generation method comprises the steps that (1) heat pipe heat-absorption cooling is conducted on airtight submerged arc furnace gas the temperature of which ranges from 700 DEG C to 900 DEG C firstly, a first working medium material the boiling point of which is above 100 DEG C is adopted for a heat pipe, and the upper portion of the heat pipe transmits heat to a second working medium material the boiling point of which is lower than that of the first working medium material in a pressure container; (2) the second working medium material absorbs heat in the pressure container to generate steam, and evaporated second organic working medium steam enters a turbine along a circulating path to generate power in a rotating mode; (3) steam discharged by the turbine is cooled through a condenser into liquid second working media, the second working media are pressurized and enter the pressure container to absorb the heat transmitted by the heat pipe again for circulation, and the heat absorption process of the second working media is repeated in circles so that heat energy in the airtight submerged arc furnace gas can be converted into electric energy. According to the method, multiple effects can be realized with the ingenious method, test temperature can be reduced to enable the furnace gas to be processed conveniently, energy recovery can be realized to obtain high-quality electric energy, and control is easy.

Description

technical field [0001] The invention relates to a furnace gas purification device for a closed submerged arc furnace, in particular to a power generation method and device for obtaining heat energy by cooling down during the gas purification process of a closed submerged arc furnace. technical background [0002] A typical 40.5MVA closed submerged arc furnace produces 8000NM3 / h furnace gas during operation, the temperature reaches 700-900℃, the dust content is 150mg / NM3, and CO80%. For closed submerged arc furnaces (including similar or more powerful closed submerged arc furnaces), the furnace gas is purified and recovered for CO reuse. At present, the filter material of the furnace gas purification device with mature and reliable technology can withstand a maximum temperature of 300 ° C. Before the furnace gas enters the filter It must be cooled. The traditional cooling method is air cooling or air cooling plus water cooling, which wastes the heat energy in the gas of the c...

AI Technical Summary

Problems solved by technology

For closed submerged arc furnaces (including similar or more powerful closed submerged arc furnaces), the furnace gas is purified and recovered for CO reuse. At present, the filter material of the furnace gas purification device with mature and reliable technology can withstand a maximum temperature of 300 ° C. Before the furnace gas enters the filter It must be cooled. The traditional cooling method is air cooling or air cooling plus water cooling, which wastes the heat energy in the gas of the closed submerged arc furnace. At the same time, a large amount of electric energy must be consumed during the cooling process, which violates the original intention of energy saving and environmental protection.

Images