A Sensible Heat Storage Direct Steam Generation System and Method Based on Series Regulation

Abstract

The invention discloses a sensible heat storage type direct steam generation system and method based on series-connection adjustment. The system comprises an outlet header, an outlet connection pipe, a heat storage body, a heat exchange pipe, a first temperature sensor, a sealed heat-preserving layer, a three-way valve, a check valve, an inlet header, a circulating water pump, a flowmeter, a control cabinet, a water supplementing connection pipe, a water storage pond, a second temperature sensor and a third temperature sensor. A pipeline series-connection method is adopted for the system, by means of the method that the heat exchange area is increased in the flowing direction, the problem that because the temperature of the heat storage body is lowered, the heat exchange coefficient and the heat exchange power are reduced is solved; and in the heat exchange process of the system, the flow in single pipelines is not changed, the heat exchange process is relatively simple, and design and calculation of the system are convenient. By means of implementation of the system, the running cost of a traditional electric boiler can be effectively lowered, after calculation, the cost generated by adopting the steam system is equivalent to that generated by adopting a natural gas system, and broad market application prospects are achieved.

Description

technical field [0001] The invention relates to a sensible heat storage type direct steam generation system and method based on series adjustment, and belongs to the technical field of sensible heat storage and heat exchange. Background technique [0002] With the promotion of energy saving and emission reduction strategies, traditional small and medium-sized coal-fired boilers with high energy consumption and high pollution will be gradually replaced and eliminated, which will bring huge market space to the heating market. At present, the heat supply demand of the market mainly depends on the large-scale heat supply units of thermal power plants, but this mechanism requires a long period of planning and construction, and the market flexibility is poor. For decentralized heating demand, natural gas boilers, electric boilers and solar boilers have huge room for development, but natural gas boiler systems have insufficient gas supply, electric heating boilers have high electri...

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Problems solved by technology

The structure of this system is relatively simple, and its operation safety is higher than that of the phase-change heat transfer system. However, the main problem is that the temperature of the heat storage body continues to decrease during the heat transfer process, resulting in a lower heat transfer power under the condition of the same heat transfer area. It can only be used in occasions that do not require high steam parameters, and cannot meet the needs of heat utilization systems that have strict requirements on steam parameters and output power, such as heating boilers, etc.

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