Medium-deep-layer noninterference geothermal system and gas-fired boiler combined heating system

Abstract

A medium-depth-layer noninterference geothermal system and gas-fired boiler combined heating system comprises a noninterference geothermal indirect heating system and a gas-fired boiler heating system. The noninterference geothermal indirect heating system provides a foundation heat source for a user. When the heating cannot meet the requirements of the user, the gas-fired boiler heating system is started, and combined operation is conducted for providing the heat source for the user; and particularly, during the early stage and the last stage of the cold period of heating and when the heat load is small, the noninterference geothermal indirect heating system is used as the heating source; in the freeze-up period, the gas-fired boiler is started, water is input into the tail end of the user through an efficient heat exchanger for supplementing heat, and heating is conducted in combination with the noninterference geothermal indirect heating system. By the adoption of the medium-depth-layer noninterference geothermal system and gas-fired boiler combined heating system, the usage amount of gas can be lowered greatly when the gas-fired boiler is singly adopted for heating, the heating cost is lowered, primary energy is saved, the ratio of clean and renewable geothermal energy in the heating is increased, the perfect combination of environment protection and economic rationality is achieved, the more energy-saving and environmental-friendly heating is achieved, the cost is low, and the reliability is achieved.

Description

technical field [0001] The invention belongs to the technical field of geothermal energy development and utilization, and in particular relates to a combined heating system of a medium-deep layer non-interference geothermal system and a gas boiler. Background technique [0002] Geothermal energy is a renewable energy that originates from the decay of molten magma and radioactive substances in the earth and exists in the form of heat. At present, non-interference geothermal technology is used in the utilization of mid-deep geothermal energy, which has the characteristics of energy saving, environmental protection, and low operating cost. However, the construction cost of non-interference geothermal system is relatively high, which limits the utilization of non-interference geothermal technology . Although the gas boiler has low construction cost and flexible construction, it uses primary energy, consumes a lot of gas, and the heating operation cost is too high. Contents of...

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Problems solved by technology

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a combined heating system of medium-deep uninterrupted rock thermal system and gas-fired boiler. , the uneven distribution of heat load during the day and night, taking advantage of the low operating cost of the non-interference geothermal system, heat supply in the early cold period, the end cold period and when the heat load is relatively small; at the same time, in the severe cold period, extreme cold When the weather and heat load demand is large, the characteristics of the large heating load of the gas-fired boiler are used to turn on the joint heating of the gas-fired boiler and the non-interference geothermal system to make up for the lack of separate heating

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