Chain coal-fired boiler capable of reducing nitrogen oxide emission

Abstract

The invention discloses a chain coal-fired boiler capable of reducing nitrogen oxide emission. The chain coal-fired boiler capable of reducing nitrogen oxide emission comprises a furnace body internally provided with a furnace hearth, wherein the furnace hearth is jointly defined by a furnace wall, a boiler cylinder and a water cooling wall pipe; a front furnace arch and a rear furnace arch are arranged in the furnace hearth; a chain plate type grate driven by a power mechanism is arranged under the furnace hearth; an air supply device is arranged on the furnace body; a coal supply hopper is arranged in front of the furnace body; an exhaust gas passing pipe penetrating through the boiler cylinder is arranged on the furnace body; the chain plate type grate comprises two oppositely arranged transmission chains; a support rod is arranged between the two transmission chains; a grate plate is hinged to the support rod; the coal supply hopper comprises a coal supply hopper type box; a coal inlet is arranged on the top part of the coal supply hopper type box, and a coal outlet located above the front part of the chain plate type grate is arranged on the bottom part of the coal supply hopper type box; a material distributing roller driven by a power device is rotatably connected to the upper part in the coal supply hopper type box; a plurality of material distributing dialing plates are circularly distributed on the material distributing roller; an adjustable guide funnel located under the material distributing roller is arranged in the coal supply hopper type box. The chain coal-fired boiler capable of reducing nitrogen oxide emission has the advantage and effect that the nitrogen oxide emission can be effectively controlled.

Description

technical field [0001] The invention specifically relates to a chain coal-fired boiler capable of reducing nitrogen oxide emissions. Background technique [0002] In the regulations issued by the state, the emission concentration of soot, sulfur dioxide, nitrogen oxides and smoke blackness must not exceed the limit value, and the nitrogen oxide requirement of coal-fired boilers is 100mg / Nm3 (whereas the W-type flame furnace and the existing circulation The fluidized bed thermal power boiler is 200mg / Nm3), and the smoke and dust emission value of coal-fired and oil-fired boilers in newly built enterprises is consistent with the national standard limit. At present, the development of nitrogen oxide control technology for small and medium-sized industrial boilers is relatively backward, and most industrial boilers have not adopted any nitrogen oxide emission control measures. Therefore, it is necessary to control nitrogen oxides in existing industrial boilers. It is difficult ...

AI Technical Summary

Problems solved by technology

At present, the development of nitrogen oxide control technology for small and medium-sized industrial boilers is relatively backward, and most industrial boilers have not adopted any nitrogen oxide emission control measures

Therefore, it is necessary to control nitrogen oxides in existing industrial boilers. It is difficult to control nitrogen oxides in existing industrial boilers. This is mainly because: First, most of the existing nitrogen oxide emission control technologies are used in pulverized coal-fired power plants Boilers, industrial boilers, especially coal-fired chain boilers, still lack practical application examples; secondly, most industrial boilers do not reserve SNCR or SCR transformation interfaces and spaces for nitrogen oxide reduction, and there is a certain degree of engineering transformation. Difficulty, there is no SNCR transformation interface at the water wall of the furnace

Images