Gas-fired steam boiler producing ultra-low nitrogen
A gas steam, ultra-low nitrogen technology, used in steam boilers, water-tube steam boilers, steam generation and other directions, can solve the problems of high emission of nitrogen oxides in flue gas, large floor space, low thermal efficiency, etc., to reduce nitrogen oxides. The effect of reducing the amount of pollutants, increasing the heat exchange efficiency, and increasing the contact area
Pending Publication Date: 2019-11-08
ZHEJIANG UNIPOWER BOILER CO LTD
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Problems solved by technology
In actual use, there are defects such as large footprint, slow start, low thermal efficiency, and high emission of nitrogen oxides in flue gas.
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[0022] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.
[0023] Such as figure 1 and figure 2 As shown, the ultra-low nitrogen gas-fired steam boiler described in this embodiment includes a furnace body 1, and an upper header 10, a lower header 15, and a second header between the upper header 10 and the lower header 15 are arranged in the furnace body 1. A group of water pipes and a second group of water pipes. The second group of water pipes is arranged on the periphery of the first group of water pipes and is isolated from the first group of water pipes. The top of the first group of water pipes passes through the upper partition 11 and communicates with the upper header 10. end through the lower partition 16 to communicate with the lower header 15; the bottom side of the upper header 10 is provided with a boiler water inlet pipe 13, the top of the seco...
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The invention discloses a gas-fired steam boiler producing ultra-low nitrogen. The gas-fired steam boiler comprises a boiler body, wherein an upper collection box, a lower collection box, a first water pipe group and a second water pipe group are arranged in the boiler body, the first water pipe group and the second water pipe group are arranged between the upper collection box and the lower collection box, the second water pipe group is arranged outside the first water pipe group and isolated from the first water pipe group, top ends of the first water pipe group and the second water pipe group both penetrate through an upper partition board to communicate with the upper collection box, and bottom ends of the first water pipe group and the second water pipe group both penetrate through alower partition board to communicate with the lower collection box; a boiler water feeding pipe is arranged on one side of the bottom of the upper collection box; a gas distributor is arranged on oneside of the first water pipe group, a combustor is arranged on the side, facing the first water pipe group, of the gas distributor, and premixed gas is fed into a gas inlet of the gas distributor. According to the gas-fired steam boiler producing ultra-low nitrogen, emission of nitric oxides from the steam boiler can be reduced significantly, the contact area of a heat source and water is increased, the heat exchange efficiency is enhanced, waste heat of smoke discharged from the boiler is fully used, the volume of the boiler is relatively small, energy consumption is relatively low, and energy conservation and emission reduction are realized.
Description
technical field [0001] The invention relates to the technical field of gas-fired steam boilers, in particular to an ultra-low nitrogen gas-fired steam boiler. Background technique [0002] In the existing gas-fired steam boiler, it is generally composed of a furnace, a first return smoke pipe, a second return smoke pipe, a shell, a combustion chamber, front and rear smoke boxes, etc. The flame generated by diffusion combustion radiates through the furnace and reaches the first The return and second return flue pipes heat the water in the boiler to generate steam. Due to the long combustion flame, the boiler is usually a horizontal structure. This type of boiler has large volume, heavy weight and large boiler water volume. In actual use, there are defects such as large footprint, slow start-up, low thermal efficiency, and high emission of nitrogen oxides in flue gas. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the p...
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IPC IPC(8): F22B21/04F22D1/24
CPCF22B21/04F22D1/24
Inventor 赵荣新高小平王永强邱尔鹏
Owner ZHEJIANG UNIPOWER BOILER CO LTD