Phase change heat exchange hot water machine set

Abstract

The invention discloses a phase change heat exchange hot water machine set. The phase change heat exchange hot water machine set comprises a boiler body which is internally provided with a hearth. A boiler door of the boiler body is externally provided with a burner which can spray combustion flame to the interior of the hearth. The boiler body is further internally provided with a vacuum cavity filled with heating medium water. A plurality of smoke heat exchange exhaust pipes are connected in series in the vacuum cavity, one ends of the smoke heat exchange exhaust pipes communicate with the hearth, and the other ends of the smoke heat exchange exhaust pipes communicate with a blowdown stack. The upper portion of the boiler body is provided with an internal heat exchanger, and after the heating medium water in the vacuum cavity is heated, saturated steam is formed and subjected to heat exchange through the heat exchanger. A hot water outlet of one end of a cold water heat exchange runner of the internal heat exchanger communicates with a hot water outlet pipe, and a cold water inlet of the other end of the cold water heat exchange runner of the internal heat exchanger communicates with a cold water inlet pipe. An external smoke heat exchanger is further arranged between the cold water inlet of the internal heat exchanger and the cold water inlet pipe, the smoke heat exchange exhaust pipes which are connected with and extend out from the internal heat exchanger are connected to the external smoke heat exchanger, and the smoke heat exchange exhaust pipes are connected to the external blowndown stack after being connected with and extending out from the external smoke heat exchanger. The phase change heat exchange hot water machine set has the characteristics that the structure composition is reasonable, the effect of corrosion resistance is achieved, the heat exchange coefficient is improved greatly, the exhaust smoke temperature is lowered, and the heat efficiency is high.

Description

Technical field [0001] The invention relates to a phase-change hot water unit for providing hot water for daily life, and belongs to the technical field of boiler hot water. Background technique [0002] In the traditional drum-type hot water boiler, the water in the boiler is connected to the external through the forced circulation of the water pump. When it is started, the internal heat of the boiler will always be taken away by the outside, and the temperature of the boiler water in the boiler will be lower than the smoke for a long time. The dew point temperature of water vapor in the gas, the flue gas will condense in the furnace body (including the furnace and the flue pipe) for a long time, making the boiler prone to corrosion; [0003] Traditional drum-type hot water boilers, whose water cycle is circulated by water pumps, are prone to hydraulic balance imbalance. Because traditional drum-type boilers basically adopt a three-pass structure, the temperature and pressure of f...

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Problems solved by technology

[0002] In the traditional drum-type hot water boiler, the water in the boiler is connected to the external connection through the forced circulation of the water pump. When starting up, the heat inside the boiler will always be taken away by the outside, and the temperature of the boiler water in the boiler will be lower than that of the smoke for a long time. The dew point temperature of water vapor in the gas, the flue gas will condense in the furnace body (including the furnace and smoke pipe) for a long time, making the boiler prone to corrosion;

[0003] Traditional drum-type hot water boilers circulate water through water pumps, which is prone to hydraulic imbalance; since traditional drum-type boilers basically adopt a three-pass structure, the temperature and pressure of the flue gas and boiler water in the third pass are relatively small , the heat transfer coefficient is relatively small, which is a waste of steel

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