Device for preheating boiler water through boiler chimney smoke

Abstract

The invention relates to the technical field of boiler heating, and discloses a device for preheating boiler water through boiler chimney smoke. The device comprises a heat exchange box, a hot water storage tank and a heat exchange pipe, wherein one end of the heat exchange box is connected with a boiler through a smoke inlet pipe, the other end of the heat exchange box is connected with a chimney through a smoke outlet pipe, and hot gas generated by combustion in the boiler flows into the heat exchange box from the smoke inlet pipe and then flows into the chimney from the smoke outlet pipe to be discharged; a water inlet pipe and a water outlet pipe are arranged on the upper end face of the heat exchange box, the water inlet pipe is connected with a tap water pipe, and the water outlet pipe is connected with the hot water storage tank; and the heat exchange pipe is arranged in the heat exchange box. According to the device for preheating the boiler water through the boiler chimney smoke, the heat exchange box is arranged between a gas outlet of the boiler and the chimney, heat in the hot gas of the boiler is absorbed through the heat exchange pipe and then is used for heating water in the heat exchange pipe, and the heated water is stored for use, so that the resource utilization rate is increased, and meanwhile the pollution of the boiler gas to the atmosphere is reduced.

Description

technical field [0001] The invention relates to the technical field of boiler heating, in particular to a boiler chimney flue gas preheating boiler water device. Background technique [0002] The boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of heat energy. [0003] Industrial boilers on the market basically let low-temperature water directly enter the heating water tank of the boiler, and then heat it at high temperature. After obtaining high-temperature water, it is introduced into the pipeline for use. The boiler coal-fired tail gas with a temperature as high as 600 ℃ to 700 ℃ is often discharged into the air without being utilized, which not only wastes heat energy, but also aggravates air pollution. [0004] According to a boiler chimney flue gas preheating boiler water device disc...

AI Technical Summary

Problems solved by technology

However, the boiler coal-fired tail gas with a temperature as high as 600 ℃ ~ 700 ℃ is often discharged into the air without being used, which not only wastes heat energy, but also aggravates air pollution.

[0004] According to a boiler chimney flue gas preheating boiler water device disclosed in Chinese Patent Application No. 201110002836.1, the boiler chimney flue gas preheating boiler water device uses the high-temperature tail gas generated by fuel combustion to preheat cold water, although the same amount of water is heated Under the condition of the specified temperature, it is more fuel-efficient; however, during the long-term use of the boiler, thick boiler dust will adhere to the outside of the water tank or heat exchange tube, and if it is not cleaned regularly, the effect of heat transfer will be reduced , leading to a decrease in the heat transfer efficiency between low-temperature water and high-temperature hot gas, so we propose a boiler chimney flue gas preheating boiler water device

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