Heat storage type geothermal high-efficiency central heating system

Abstract

The invention belongs to the geothermal heating technology, and particularly relates to a heat storage type geothermal high-efficiency central heating system. The heating system comprises a heat collection circulating system, a heat supply circulating system and a water replenishing system, wherein the heat collection circulating system comprises a water collection well, a water collection pump, awater collector, a cyclone desander, a primary plate type heat exchanger, a secondary plate type heat exchanger, a filtering device, a recharge pressurizing pump, a water separator and a recharge well; and the heat supply circulating system comprises a heat storage device, a heat pump unit, a heat user, a heat-exchanger water pump, a heat supply circulating pump, a heat pump intermediate water circulating pump, a first heat pump bypass valve and a second heat pump bypass valve. According to the technical scheme, the heat storage technology and a geothermal energy heat supply system are combined proportionally, load shifting of the heat source heat supply load are achieved through intermittent storage in a valley heat supply load period and stable output in a peak heat supply load period.

Description

technical field [0001] The technology belongs to the geothermal heating technology, and in particular relates to a heat storage type geothermal high-efficiency centralized heating system. Background technique [0002] With the further development of economic globalization, the world's demand for resources is increasing day by day, and the demand for energy such as oil and coal, which dominate energy consumption, is also gradually increasing. The proven reserves of oil, coal and other resources are very large. Limited, the contradiction between supply and demand is becoming increasingly tense. At the same time, the problem of environmental pollution caused by traditional fossil energy is becoming more and more serious, and energy conservation and emission reduction have gradually become one of the important issues in various countries. Countries around the world are gradually converging on their understanding and actions on major issues such as greenhouse gas emission reduct...

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Problems solved by technology

[0004] my country's hydrothermal geothermal resources are relatively abundant, equivalent to 1,250 billion tons of standard coal, and the annual exploitable amount is equivalent to 1.865 billion tons of standard coal, but the current mining rate is only 0.2%, and the development and utilization of geothermal resources has great potential

Direct extraction of water for heating is the most common development method for hydrothermal-type medium-deep geothermal resources, but the cost of geothermal wells is relatively high, usually accounting for more than half of the total investment; Well locations and drilling sites are often limited

[0005] With the continuous development of heat storage materials and heat storage technology, the collection and utilization of clean energy with the characteristics of temporal and spatial distribution and supply and demand changes through heat storage has a technical basis, but this kind of efficient and energy-saving geothermal energy central heating method has not yet been proposed

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