Condensing boiler and heat pump combined heating system

Abstract

The invention discloses a condensing boiler and heat pump combined heating system. A combustor is installed in an inlet of a hearth, gas / fuel and hot air are sprayed out from the combustor according to the flow ratio and burn in the hearth to form high temperature flame; flue gas passes through a boiler tube bundle heat exchanger and transfers heat to water; and the flue gas after heat releasing passes through a high-temperature air preheater, and air flowing through the high temperature air preheater is further heated. The flue gas passes through a condensing flue gas deep waste heat recovery device, and sensible heat of the fuel gas and latent heat of vaporization of water vapor are released, an organic working medium of a heat pump device is heated and gasified, the waste heat of the flue gas at the tail of the heat pump device is absorbed, and heating water is heated through the organic working medium circulation. According to the condensing boiler and heat pump combined heating system, the waste heat of fuel gas exhausting of the flue gas boiler is recovered deeply by using the low-temperature organic working medium the heat pump, the waste heat quality is improve to generate a high temperature working medium, the heating water is further heated, and the purpose of energy saving, consumption reducing and emission reducing is achieved.

Description

technical field [0001] The invention belongs to the technical field of heating equipment, and in particular relates to a combined heating system of a condensing boiler and a heat pump. Background technique [0002] Residential heating in winter consumes a large amount of primary energy and emits a large amount of pollutants. Among the traditional heating methods, my country's heating boilers are mainly coal-fired. With the increasing air pollution in recent years and more and more smoggy weather in winter, the Chinese government advocates the use of clean energy for heating in northern regions. Some areas have regulations that do not allow the use of coal-fired boilers in urban areas and recommend the use of clean heating equipment such as heat pumps or gas / oil boilers. [0003] In the process of using gas / oil-fired boilers, there are some problems: in order to avoid condensation on the heating surface at the tail, and then cause low-temperature corrosion of the heating su...

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Problems solved by technology

[0003] In the process of using gas / oil-fired boilers, there are some problems: in order to avoid condensation on the heating surface at the tail, and then cause low-temperature corrosion of the heating surface, the design of conventional gas / oil-fired boilers requires the wall temperature of the heating surface at the tail to be higher than the acid dew point. At present, The exhaust gas temperature of most gas-fired boilers is higher than 120°C, and the exhaust gas temperature of some gas-fired boilers even reaches 200°C

The ground source heat pump device is a technology that absorbs underground heat through underground pipes and heats the water through the heat pump. The advantages are: the temperature of the underground heat in winter is high, the energy efficiency of the unit is high, and the energy saving effect is very significant; the disadvantage is: the ground source heat pump Higher construction costs for drilling and installing underground pipes

The air source heat pump device is a technology that absorbs the heat of the air through the fin heat exchanger and heats the water through the heat pump. The advantages are: the equipment is easy to install; the disadvantages are: the outdoor air temperature is low in winter, the energy efficiency of the heat pump is low, and the extreme cold weather The heating effect under certain conditions is poor, and the stability of the system is poor

Combining the characteristics of the above two heat pump devices, it can be seen that the selection of the heat source of the heat pump heating system is very important, and it is difficult to select a heat source that is both efficient and stable with low investment in natural resources.

High initial investment hinders the popularization and application of heat pump heating technology

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