Chain-grate boiler pulverized coal conveying pipeline provided with secondary pressure stabilizing system

Abstract

The invention discloses a chain-grate boiler pulverized coal conveying pipeline provided with a secondary pressure stabilizing system. The chain-grate boiler pulverized coal conveying pipeline provided with the secondary pressure stabilizing system is arranged between a pulverized coal grinding machine and a chain-grate boiler and comprises a pulverized coal conveying pipeline body; a buffering barrel I is arranged in the pulverized coal conveying pipeline body; the buffering barrel I is arranged in the portion, connected with a pulverized coal outputting pipe of the pulverized coal grinding machine, of the pulverized coal conveying pipeline body; the through-flow cross area of the buffering barrel I is 2-8 times that of the pulverized coal conveying pipeline body; according to the further improvement, a buffering barrel II is arranged in the portion, between the buffering barrel I and the chain-grate boiler, of the pulverized coal conveying pipeline body; and the through-flow section area of the buffering barrel II is 1.5-3 times that of the pulverized coal conveying pipeline body. According to the chain-grate boiler pulverized coal conveying pipeline provided with the secondary pressure stabilizing system, the pressure fluctuation of the pulverized coal conveying pipeline body is remarkably reduced by means of secondary buffering and pressure stabilizing, and the combustion uniformity and the running stability of the chain-grate boiler are improved.

Description

technical field [0001] The invention relates to the field of coal-fired boilers, in particular to a chain boiler pulverized coal conveying pipeline. Background technique [0002] At present, coal-fired boilers are the main boilers used in the production of small and medium-sized enterprises in my country and in urban central heating, most of which are chain boilers. In order to improve combustion efficiency, the existing chain boilers are generally equipped with pulverized coal grinders to grind coal into pulverized coal. Finally, the pulverized coal is atomized through the pulverized coal delivery pipeline and then input into the furnace of the chain boiler. The existing pulverized coal transportation pipeline basically adopts equal-diameter pipes from the pulverized coal grinder to the chain boiler. This kind of pipeline structure is simple, but due to the unevenness of coal quality, the possibility of deflagration at the outlet of the igniter is very high. If it is large,...

AI Technical Summary

Problems solved by technology

The existing pulverized coal transportation pipeline basically adopts equal-diameter pipes from the pulverized coal grinder to the chain boiler. This kind of pipeline structure is simple, but due to the unevenness of coal quality, the possibility of deflagration at the outlet of the igniter is very high. If it is large, it will inevitably cause pressure fluctuations in the pipeline. Abnormal impurities in the pipeline, such as ground films, braids, and other filaments, will block the pipeline, which must be brought into the furnace by a spoiler for combustion. Pressure fluctuations are caused in a short period of time, and these pressure fluctuations will affect the uniformity of combustion of the chain boiler and affect the smooth operation of the chain boiler

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