Boiler dropping tube

Abstract

The invention discloses a boiler dropping tube. The boiler dropping tube comprises a dropping tube, a first air channel, a second air channel, a separation assembly and a hollow heat conducting tube,wherein the dropping tube is obliquely arranged on the sidewall of a boiler, the upper end and lower end of the dropping tube are separately provided with a feeding port and a discharging port and thedischarging port is connected with the inside of the boiler; the first air channel is located at the lower sidewall of the dropping tube and close to the position of the feeding port; the first air channel provides a first airflow blowing into the dropping tube; the second air channel is located at the middle and lower portion of the lower sidewall of the dropping tube and provides a second airflow blowing into the dropping tube; the separation assembly is provided with a plurality of separating rods, wherein the separating rods are located on the flow path of the first airflow, and one end of each separating rod is fixed on the upper sidewall of the dropping tube; the hollow heat conducting tube is provided with a water inlet and a water outlet and spirally wound on the lower end of theouter wall of the dropping tube. According to the boiler dropping tube, the fuel combustion is more stable and sufficient, the turbulent smoke generated by the explosion is reduced, the fuel accumulation in the dropping tube is avoided, and the fuel delivery efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of biomass combustion boilers, in particular to a boiler blanking pipe. Background technique [0002] Commonly used biomass fuels mainly include various agricultural wastes (such as rice husks, cotton stalks, rice stalks, wheat stalks, and corn stalks, etc.), forestry wastes (such as branches, wood, bark, sawdust, etc.) and animal husbandry waste. (such as chicken powder, duck manure, etc.), the characteristics of biomass fuel: large moisture content, generally > 30%, greater than coal moisture; high volatile content > 70%. The combustion method of the circulating fluidized bed boiler is suspension combustion. When the fuel enters the furnace, it absorbs heat first, and then burns after reaching the ignition point after the volatile matter is precipitated. The generation of flue gas reverse channeling will cause a great safety hazard to the feeding device. Contents of the invention [0003] In view...

AI Technical Summary

Problems solved by technology

The combustion method of the circulating fluidized bed boiler is suspension combustion. When the fuel enters the furnace, it absorbs heat first, and then burns after reaching the ignition point after the volatile matter is precipitated. The generation of flue gas reverse channeling, causing a great safety hazard to the feeding device

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