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Gas channeling prevention system of screw feeder

A screw feeder, anti-channeling technology, which is applied in the direction of fuel supply, fuel burning in a molten state, and combustion method, etc., to achieve the effect of simple structure, preventing poor feeding, and timely blocking of channeling gas

Active Publication Date: 2015-07-15
中科清能燃气技术(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has a certain effect on dealing with the bridging problem of the silo, it cannot prevent the high-temperature gas from flowing back into the screw feeder

Method used

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  • Gas channeling prevention system of screw feeder
  • Gas channeling prevention system of screw feeder
  • Gas channeling prevention system of screw feeder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, a single-stage screw feeder 1 feeds biomass molding particles into a circulating fluidized bed furnace, and is equipped with a sensing device, a control device 3, and a storage bin 4 for an anti-channeling gas medium. The anti-channeling gas medium storage silo 4 is filled with sieved kaolin whose average particle size is smaller than the average particle size of biomass molding particles.

[0040] The middle part of the casing of the screw feeder 1 is provided with a first temperature sensor 2 , and the monitored temperature signal is transmitted to the control device 3 . On the casing of the screw feeder 1, an anti-channeling gas medium inlet is provided between the material outlet and the first temperature sensor 2, and the distance between it and the material outlet of the feeder is 4 times the pitch of the screw blade. There is also a plugging detection temperature sensor 5 between the anti-channeling gas medium inlet and the material ou...

Embodiment 2

[0043] Such as figure 2 As shown, the two-stage screw feeder feeds coal to the gasifier, the first-stage screw feeder 11 feeds the material to the hopper of the second-stage screw feeder 12, and the second-stage screw feeder 12 is connected to the gasifier. It is the final feeder; screw feeders 11 and 12 are equipped with anti-blow-by gas devices, including sensing devices, control devices 31 and 32, and anti-blow-by gas medium storage bins 41 and 42, respectively. The temperature sensors 21 and 22 of the sensing device are respectively arranged on the casing of the two-stage screw feeder and the rear side of the inlet for the anti-blow-by gas medium. The control valve is a star valve, the distance between the inlet of the anti-channeling gas medium and the material outlet of the feeder is twice the pitch of the helical blade, and the anti-channeling gas medium in the storage bins 41 and 42 of the anti-channeling gas medium and the feed material The materials in the machine ...

Embodiment 3

[0047] Such as image 3 As shown, screw feeder 1 feeds fine coal with a particle size of 0-8mm into the gasification furnace. Since the pressure in the gasification furnace is higher than atmospheric pressure, in order to prevent high-temperature gas from entering the feed material under normal feeding conditions In the machine, the protective gas whose pressure is higher than the pressure in the furnace is passed into the screw feeder 1.

[0048] The anti-blow-by device includes a sensing device, a control device 3, and an anti-blow-by gas medium storage bin 4. The sensing device includes an air pressure sensor 6, which is located on the casing of the screw feeder 1 and behind the inlet of the anti-blow-by gas medium. The distance between the inlet of the anti-channeling gas medium and the material outlet of the screw feeder is 3 times of the pitch of the screw blade. The anti-blow-by gas medium inlet is connected with the anti-blow-by gas medium storage bin 4 above it throu...

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Abstract

The invention discloses a gas channeling prevention system of a screw feeder. The gas channeling prevention system comprises a sensing device, a gas channeling prevention medium storage bin, a gas channeling prevention medium feeding port and a control device, wherein the sensing device is used for sensing temperature and air pressure inside a material channel, the gas channeling prevention medium storage bin is arranged above the material channel of the screw feeder and used for storing gas channeling medium, the gas channeling prevention medium feeding port is formed between the gas channeling prevention medium storage bin and the screw feeder, when the gas channeling prevention medium feeding port is opened, the gas channeling medium in the gas channeling prevention medium storage bin enters the material channel and forms material seal between the gas channeling prevention medium feeding port and a material outlet, and the control device is connected with a sensing device circuit and is used for opening the gas channeling prevention medium feeding port through a control valve when the temperature or the air pressure, in the material channel, sensed by the sensing device is not in accordance with preset temperature or air pressure. By the gas channeling prevention system of the screw feeder, unsmooth feeding and systematic air leakage caused by gas channeling and material degeneration coking, blocking and screw feeder damaging, inside the feeder, due to high-temperature gas channeling can be prevented.

Description

technical field [0001] The invention relates to the field of screw feeders in the machinery industry, in particular to an anti-gas-by-gas system for the screw feeder. Background technique [0002] Screw feeder is a widely used feeding device, especially suitable for occasions with high air tightness requirements and high temperature. However, if the material in the feeder is emptied, the spiral groove cylinder is not fully filled or the seal is not tight due to the large gap between the material particles, it is easy for the gas to enter the feeder and cause system leakage. If the temperature of the anti-channeling gas is high, it will easily cause denaturation and coking of the material in the screw feeder, cause blockage, affect feeding, and may cause fire and burn the screw blade and screw shaft in severe cases. [0003] For example, when a screw feeder is used to feed coal to the furnace or combustion chamber, if high-temperature flue gas reverses, it will cause denatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65G33/24F23K3/00F23C10/22
Inventor 朱治平孟广军吕清刚高鸣刘周恩那永洁
Owner 中科清能燃气技术(北京)有限公司
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