Powdered solid fuel boiler equipped with regenerative rotary reversing heater
A solid fuel, rotary reversing technology, applied in the field of heat exchange, can solve the problems of catalyst pollution, denitrification efficiency reduction, large dust content in flue gas, etc., and achieve the effect of reducing emissions
Inactive Publication Date: 2015-11-25
北京神雾电力科技有限公司
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Problems solved by technology
The denitrification method in the prior art has the following defects: 1. The installation of a denitrification device takes up a large space. For the existing boiler, there is insufficient space at the tail, and the denitrification device cannot be installed; 2. If the denitrification device is arranged before the dust removal device, The dust content in the flue gas is large, the fly ash will pollute and wear the catalyst seriously, and sometimes blockage will occur; 3. If the denitrification device is arranged after the dust removal device, the efficiency of the catalyst will decrease due to the decrease in the temperature of the flue gas after dust removal, making the denitrification Reduced efficiency
Method used
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[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0023] In describing the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular ...
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The invention discloses a powdery-solid-fuel boiler with a heat-accumulating-type rotary reversing heater. The powdery-solid-fuel boiler comprises a hearth, the heat-accumulating-type rotary reversing heater, a smoke passage and an air passage, wherein the inlet end of the smoke passage is communicated with the top of the hearth, the outlet end of the smoke passage is communicated with the heat-accumulating-type rotary reversing heater, the heat-accumulating-type rotary reversing heater comprises heat carriers, the heat carriers are contained inside containing parts respectively and made of nonmetal solid materials, and provided with denitration catalyst layers, and the air passage is used for leading air into at least the other one of the paired containing parts. According to the powdery-solid-fuel boiler, the heat carriers are heated through high-temperature smoke, the temperature of the heat carriers is rapidly raised, and as the denitration catalyst layers are arranged on the heat carriers to carry out denitration processing on the high-temperature smoke, oxynitride discharging of the powdery-solid-fuel boiler can be reduced.
Description
technical field [0001] The invention relates to the technical field of heat exchange, in particular to a powdered solid fuel boiler equipped with a regenerative rotary reversing heater. Background technique [0002] The rotary air preheater is a flue gas tail heat exchange device commonly used in major power plant boilers. Its performance directly affects the thermal efficiency of the boiler. The traditional rotary air preheater generally uses metal as the heat transfer medium, which can only recover the heat of the flue gas below 500°C. By preheating the combustion air, the heat of the flue gas is brought back to the furnace, and the combustion condition is improved, thereby increasing the boiler's efficiency. efficiency. [0003] And the tail gas needs to be denitrified. The existing technology is to use the SCR (Selective Catalytic Reduction) denitrification method for denitration treatment. Using the existing SCR denitrification method requires the installation of a de...
Claims
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IPC IPC(8): F22B31/08F23L15/00B01D53/86B01D53/56
CPCY02E20/34
Inventor 吴道洪王胜美陈琳吴玉林鲁光明沈大平
Owner 北京神雾电力科技有限公司