Coal powder feeding device

Abstract

The invention relates to a coal powder feeding device. The coal powder feeding device comprises a bin (6), a rotor type speed regulation feeder (1) and a rotary air pipe (5) which are arranged sequentially from top to bottom. The top of the rotor type speed regulation feeder (1) and the bottom of the bin (6) are connected through an inlet connection pipe (11). The bottom of the rotor type speed regulation feeder (1) and the rotary air pipe (5) are connected through an outlet connection pipe (12). The rotary air pipe (5) comprises a first horizontal pipe segment (5.1), a second horizontal pipe segment (5.2) and a connection bent pipe segment (5.3). A Roots blower (4) is connected to one end of the first horizontal pipe segment (5.1). Venturi equipment (3) is arranged in the other end of the first horizontal pipe segment (5.1). The lower end of the outlet connection pipe (12) is connected with the venturi equipment (3) through a blanking device (2). Through the coal powder feeding device, the effect that blocking does not occur to coal powder can be ensured, continuous and stable feeding can also be achieved, and the powder feeding quantity is adjusted according to the boiler load tendency.

Description

technical field [0001] The invention relates to a pulverized coal feeding device, which is especially suitable for high-efficiency pulverized coal industrial boilers. Background technique [0002] German industrial pulverized coal boilers are known for their safety, environmental protection (exhaust gas emissions are equivalent to those of power plant pulverized coal boilers and gas boilers), advanced features (automatic measurement and control, remote control, unattended), and economical efficiency (combustion efficiency above 98%) , Boiler thermal efficiency can reach more than 92%), can be used as clean energy, and is a substitute for oil and natural gas. my country's small and medium-sized industrial pulverized coal boilers draw on the technology and concepts of German industrial pulverized coal boilers. It took 10 years to make breakthroughs in key core technologies such as pulverized coal towers, feeding, and combustion systems. [0003] Chinese patent document CN2014...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent document CN201458346U discloses a non-pulse pulverized coal supply device, which can effectively solve the phenomenon of coal pulverized accumulation, blockage and transportation compensation in the coal transportation pipeline

But it also brings another problem, because there is an unavoidable gap between the screw blade and the powder delivery pipe, and because the pulverized coal mixing ejector is installed at the bottom of the screw powder delivery pipe, a negative pressure is formed in the pulverized coal circulation pipeline, which is difficult to control Feeding speed, excess pulverized coal pours into the furnace to cause deflagration

Images