Efficient utilization system for rich coal gas of iron and steel enterprise

Abstract

The invention discloses an efficient utilization system for rich coal gas of an iron and steel enterprise. The efficient utilization system comprises a first boiler (1), a first steam flow distributor(121), a second steam flow distributor (122), a first blast turbine (2), a power generation turbine (4), a first condenser (61) and a second condenser (62). According to the efficient utilization system for the rich coal gas of the iron and steel enterprise, a steam turbine generator connected with a main pipe in parallel can be used for supporting a blast furnace steam-driven air blower, so thata boiler can adapt to load changes of a blast furnace steam-driven air blower set; a high-temperature and ultrahigh-pressure steam system with one-time reheating is adopted, so the energy conversionefficiency is greatly improved. The efficient utilization system also adopts the steam flow distributor and the feed water flow distributor to adjust the loads of the boiler and the unit at any time so as to adapt to fluctuation of rich coal gas and blast furnace working conditions.

Description

technical field [0001] The invention relates to a high-efficiency utilization system of rich gas in iron and steel enterprises. Background technique [0002] The blast furnace blower is one of the main energy-consuming equipment in iron and steel enterprises. Most of its driving methods are electric or steam-driven. One of the key factors of utilization. Blast furnace blowers are closely related to self-owned power plants of iron and steel enterprises. How to use Fuyu gas more efficiently should be considered together. [0003] In recent years, with the improvement of the power generation parameters of the self-owned power plants of steel mills, the steam parameters have successively experienced several development courses of medium temperature and medium pressure, sub-high pressure, high temperature and high pressure, and high temperature and ultra-high pressure once reheated. In the period when high-temperature and high-pressure steam parameters are the mainstream, self-...

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Problems solved by technology

However, gas-fired power generation in self-owned power plants generally adopts high temperature and ultra-high pressure with one-time reheating. They all use a unit heating system with one boiler and one steam turbine, and there is no intermediate reheating unit controlled by the mother.

Lacking the support of the blast furnace steam blower by the steam turbine generator connected in parallel with the main tube, it is difficult for the unitary high-temperature and ultra-high pressure belt primary reheating boiler to adapt to the load change of the blast furnace steam blower unit. Therefore, steel mills generally use high temperature and ultra-high pressure belt Mode construction and operation of primary reheat self-contained power plant + electric blast furnace blower

[0004] The use of electric power for the blast furnace blower is the main factor that prevents the power consumption of iron and steel enterprises from being greatly reduced. The increase in the step-up, step-down and energy conversion links of the power transmission and distribution system also increases energy loss.

Blast furnace blowers are powered by steam. Since the unitary high-temperature ultra-high pressure belt primary reheating system cannot be used, the efficiency of the steam turbine is much lower than that of the high-parameter power generation steam turbine, which will lead to low thermal efficiency of the whole plant and the inability to efficiently utilize the by-product gas of the iron and steel enterprises.

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