Thermal power plant heat network energy saving system and method

Abstract

The invention relates to a thermal power plant heat network energy saving system and method, and belongs to a firepower coal fired power generation heat supply unit. In the prior art, the energy consumption of a thermal network circulation pump is difficult to be obviously reduced. The system comprises a heat source side pipeline, and is characterized by also comprising a heat network heater, a primary heat network circulation water pump frequency converter, a primary heat network circulation water pump, a secondary heat network circulation water pump, a heat user pressure boosting pump, a heat user part temperature instrument and a user side pipeline, wherein the primary heat network circulation water pump is arranged on the heat source side pipeline; the secondary heat network circulation water pump, the heat user pressure boosting pump and the heat user part temperature instrument are arranged on the user side pipeline; the heat source side pipeline and the user side pipeline are connected with the heat network heater. The method provided by the invention comprises the following steps that during the system operation, the water supply temperature is raised; the primary heat network water supply and water return temperature differences are increased; the primary heat network circulation water flow rate is further reduced. The system and the method have the advantages that the energy consumption of the heat network circulation pump can be obviously reduced; the integral efficiency of a thermal power plant unit and the profits of thermoelectric enterprises are improved.

Description

technical field [0001] The invention relates to an energy-saving system and method for a heating network of a thermal power plant, which belongs to thermal coal-fired power generation and heat supply units. Background technique [0002] In recent years, environmental pollution has been serious, environmental risks have been high, and ecological losses have been great. The state requires the improvement of environmental quality to be the core, to fight a protracted and tough battle for environmental protection, and to reduce emissions as the top priority. The "Coal Power Energy Conservation and Emission Reduction Upgrading and Transformation Action Plan" (Fagai Energy No. 20142093) requires that the energy conservation transformation of coal power be done effectively, and the promotion of advanced coal power energy saving technologies and methods be accelerated. [0003] Due to the prominent energy problem, energy is an important restrictive factor for my country's economic ...

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Problems solved by technology

[0005] Although there are also some thermal power plant heat network energy-saving systems and methods, such as the Chinese patent whose publication date is April 23, 2014, and whose publication number is CN103742964A, a waste heat recovery thermal power plant energy storage method and its system are disclosed; and

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