Gas-steam circulation heating-electricity-cooling combined supply system and method for thermal power plant with zero energy loss rate

Abstract

The invention relates to a gas-steam circulation heating-electricity-cooling combined supply system and a gas-steam circulation heating-electricity-cooling combined supply method for a thermal power plant with zero energy loss rate and belongs to the technical field of gas-steam combined circulation heating-electricity-cooling combined supply. The gas-steam circulation heating-electricity-coolingcombined supply system comprises a heat-electricity combined circulation part, a large temperature difference adsorption waste steam recovery heat pump, a large temperature difference adsorption fluegas recovery heat pump, a flue gas condensation recovery acquisition device, an initial station steam-water heat exchanger, an adsorption heat pump / refrigeration all-in-one machine and the like, wherein the heat-electricity combined circulation part consists of a burning machine, a waste heat boiler, a steam turbine, a generator and the like. An operation regulating method for carrying out combination energy optimization on an integral thermal system, which is based on an adsorption heat-exchange waste heat recovery and large temperature difference heat supply technology and combines a climate compensation technology, is adopted, so that aiming at the characteristics of a gas-steam combined circulation system, the effect that the energy utilization efficiency for once of the thermal powerplant is close to, even exceeds 100 percent is realized. In the invention, energy resources at each energy grade are utilized to drive generating equipment, heating equipment and air-conditioning cold supply equipment, so that the energy-saving effect that compared with a flue gas low heating value, the effective energy output has no energy loss is achieved.

Description

technical field [0001] The invention belongs to the technical field of combined heat, electricity, and cooling combined supply of combustion and steam cycle, and in particular relates to a system and method for combined heat, electricity, and cooling of a thermal power plant with a combustion and steam cycle. Background technique [0002] At present, the main system forms of heating in northern China are: combined heat and power generation, regional boiler room and decentralized heating each account for about 1 / 3, among which the combined heat and power generation has the highest primary energy utilization efficiency, the best emission reduction effect, and the most economical efficiency The promotion and application are limited by factors such as the difficulty of large-scale expansion of the heating network scale and its heating capacity, and it is urgent to adopt better technical routes and policy planning for promotion. Academician Jiang Yi and Professor Fu Lin of Tsingh...

AI Technical Summary

Problems solved by technology

[0006] In the field of regional air-conditioning and cooling, the temperature difference between the supply and return water of the air-conditioning cold water in the traditional technical route usually does not exceed 5-9°C, so it has to bear a large regional cooling load, and the circulating water volume of the primary network is extremely large, even in the distance When it is large, its transmission power consumption is too large and its energy saving and economy are completely lost. Therefore, from the perspective of application practice, district cooling is still an immature technical field. The operation and maintenance of district cooling cases mainly rely on economic factors such as specific heat sales prices, rather than the real realization of reasonable energy saving effects

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