Forced circulation coal powder burning water heating boiler

Abstract

A forced circulation coal powder burning water heating boiler comprises a boiler body, a mixing header and a combustor arranged at one end of the boiler body. The forced circulation coal powder burning water heating boiler is characterized in that the boiler body comprises a hearth, a water outlet header, a connecting pipe system connecting the hearth and the water outlet header, and a boiler wall; the hearth is defined by a hearth front wall, a hearth rear wall, a hearth left boiler wall, a hearth right boiler wall, a hearth top boiler wall and a hearth bottom boiler wall; the hearth left boiler wall and the hearth top boiler wall form a hearth left wall, and the hearth right boiler wall and the hearth bottom boiler wall form a hearth right wall; the hearth left wall and the hearth right wall are each an integral membrane type water wall heating surface formed by parallelly arranging a plurality of bent L-shaped smooth pipes and welding the adjacent L-shaped smooth pipes together through flat steel; the hearth left wall and the hearth right wall are oppositely arranged and welded to a hearth upper right header and a hearth lower left header to form a frame structure; and the hearth upper right header and the hearth lower left header communicate with the smooth pipes of the hearth left wall and the hearth right wall to form a water circulation channel.

Description

technical field [0001] This project involves a 29MW pulverized coal-fired hot water boiler, specifically a forced circulation pulverized coal-fired hot water boiler. Background technique [0002] The existing pulverized coal-fired hot water boiler body has complex tube bundles, which is not conducive to sealing, so that the furnace wall adopts bulky refractory and thermal insulation brick walls, which are built with 345mm refractory bricks, and the quality is relatively heavy; The total weight of the wall requires a certain bearing capacity, so that the total steel consumption of the boiler is 140 tons. The heating surface and the water flow are complicated; the boiler adopts a single-drum vertical structure, the design height is 18m and there is no ash bucket, which is not easy to remove the ash after the pulverized coal is burned. Contents of the invention [0003] The purpose of this program is to provide a forced circulation pulverized coal fired hot water boiler. ...

AI Technical Summary

Problems solved by technology

[0002] The existing pulverized coal-fired hot water boiler body has complex tube bundles, which is not conducive to sealing, so that the furnace wall adopts bulky refractory and thermal insulation brick walls, which are built with 345mm refractory bricks, and the quality is relatively heavy; The total weight of the wall requires a certain bearing capacity, so that the total steel consumption of the boiler is 140 tons. The heating surface and the water flow are complicated; the boiler adopts a single-drum vertical structure, the design height is 18m and there is no ash bucket, which is not easy to remove the ash after pulverized coal combustion

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