Water-cooling gas furnace core and vacuum hot water boiler comprising same

Abstract

The embodiment of the invention provides a water-cooling gas furnace core and a vacuum gas-fired hot water boiler comprising the same. The water-cooling gas furnace core comprises a first clamping flange, a heat exchange tube cluster and a second clamping flange, the heat exchange tube cluster is arranged between the first clamping flange and the second clamping flange to jointly form a wall face restraining smoke circulation, the heat exchange tube cluster at least comprises a first heat exchange tube cluster and a radiation heat dissipation tube cluster, and the first heat exchange tube cluster and the radiation heat dissipation tube cluster are arranged on the wall face. And a heat exchange medium is packaged in the heat exchange tube cluster. According to the embodiment, the average heat exchange coefficient can be increased, deep cooling of high-temperature flue gas is achieved, ultralow NOx emission is guaranteed, and meanwhile the heat utilization efficiency is greatly improved.

Description

technical field [0001] The disclosure relates to the technical field of boiler equipment, in particular to a water-cooled gas furnace core and a vacuum hot water boiler containing the furnace core. Background technique [0002] As a kind of energy conversion equipment, boilers input energy such as fuel chemical energy and electric energy into the boiler, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy. Boilers are the main thermal power equipment in my country, and they are widely used in industrial, civil, electric power and other fields. [0003] At present, traditional thermal power equipment such as commercial gas-fired water heaters have problems such as unreasonable boiler core design, insufficient fuel combustion in the furnace, excessive nitrogen oxide emissions, easy air pollution, and low heat utilization efficiency. At present, boiler low-nitrogen emission measures mainly adopt various combustion optimization ...

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Problems solved by technology

However, in an environment with low air cleanliness, the metal fiber mesh is easy to block, deflagrate, flash back, unstable combustion, high maintenance costs, and high NOx emissions when the oxygen content is low; ②Low nitrogen diffusion burner combined with flue gas The return pipe FGR, the flue gas in the furnace undergoes secondary combustion. Although this combustion method is stable, the combustion is incomplete, the NOx is high and unstable, and the furnace space is relatively high, resulting in a large area of ​​the furnace body, high cost, and backflow. The flue gas is easy to produce condensed water in the furnace, which corrodes the furnace body and affects the life of the boiler; ③Atmospheric combustion mode, stable flame, has the advantages of low gas flow pressure, but it is difficult to achieve ultra-low NOx emissions, and the heat utilization efficiency is low

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