The equipment that can be used at present is mainly the technical combination of the most traditional use of boiler and steam turbine, gas - based gas - combustion engine, gas turbine and micro - gas turbine four technology options. These four technologies have their own advantages and disadvantages. Users can choose according to the actual operation and site conditions of the project.
Boiler + steam turbine: This is a very traditional technology, is also familiar with the process. It uses the boiler to directly burn the coking gas. The heat energy of the gas is converted to steam through the tube bundles in the boiler. The steam turbine is used to drive the steam turbine to drive the generator to generate electricity. The main equipment of the system is gas burner, boiler, chemical water system, water supply system, steam turbine, condenser, cooling tower, engine, transformer and control system. The process flow is more complex.
The advantages are: the demand for fuel gas is relatively low, as long as gas burners can bear, the gas can generally adapt, gas only needs limited pressure, so the gas treatment system investment is relatively simple, but the disadvantage is that the process is complex, the construction period is long, it is difficult to move again, so a large amount of water resources must be consumed. It occupies a lot of land and has a lot of management personnel. The energy utilization efficiency is too low, usually less than 20%.
This technology used to be the main technical way of using coking gas in China. It can be combined with coal-fired power plants and install gas burners in coal-fired boilers, and the coking gas of the coking plant is injected directly into the boiler. The advantage of this method is that it can adapt to the characteristics of intermittent production in the coking plant, with gas less coal and gas less combustion. Coal will not affect the quality and ability of power supply. The limitation of the technology is water, the water resources in China are extremely deficient, especially in the large provinces of coke production in Shanxi, Shaanxi and Inner Mongolia. It is difficult to use a large amount of water resources to ensure the utilization of coking coal gas. So it is necessary to consider the comprehensive utilization of coking coal and gas resources in China. A more feasible technical solution.