Anti-blocking method and equipment for biomass boiler worm feeder

A technology of screw feeder and biomass boiler, which is applied in the direction of conveyor control device, combustion method, supply configuration, etc., and can solve problems such as setting too high motor over-torque protection setting, manual cleaning, and insufficient fuel quality , to achieve the effect of reducing the probability of material blockage, resisting the decline of fire-fighting and tempering ability, and ensuring continuous and stable operation

Inactive Publication Date: 2017-01-25

HUNAN THERMAL POWER CONSTR CO LTD OF CHINA ENERGY ENG GRP

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AI-Extracted Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to solve the problems caused by the failure of the fuel quality to meet the design requirements, the unreasonable design of the length of the plug section of the feeder, and the over-torque protection setting value of the motor being too high in the actual operation of the existing biomass CFB boiler screw feeder. The feeder is often blocked, and the furnace must be stopped for manua...

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Method used

As can be seen by accompanying drawing, the present invention relates to a kind of anti-blocking device of biomass boiler screw feeder, comprising biomass boiler screw feeder 1 and material plug pipe 2, the entrance of material plug pipe 2 is connected in raw The outlet of the material boiler screw feeder 1 and the outlet of the plug tube 2 are connected to the inlet of the feed tank 3; according to the main cause of the feeder causing the blockage, the length of the plug tube is shortened and the screw feeder is extended. The length of the screw push rod is improved, and the hole is opened on the side of the plug tube to reduce the difficulty of cleaning the plug. At the same time, in order to avoid the reduction of the anti-tempering function of the plug, an anti-temper baffle is added to the assembly weight and limit The block measures are as follows:

Described material plug pipe 2 is close to the bottom of discharge end, and material plug pipe 2 side has a 200 * 100mm to poke material hole 9, and poke material hole 9 to cover by detachable poke material hole cover plate 10, in When the plug pipe needs to be cleaned, it is only necessary to open the detachable poking hole cover plate 10 to clean up, which is convenient for manual cleaning without stopping the furnace when the blockage occurs; to reduce the difficulty of cleaning the plug pipe. The detachable poking hole cover 10 is connected to the poking hole 9 of the plug tube 2 through the hinge device 11, and is locked by the locking device 12, so that the detachable poking hole cover 10 and the poking hole 9 form a Close tightly.

Described turning mechanism is solenoid valve or electric turning mechanism, connects solenoid valve or electric control device on the rotating shaft that anti-temper baffle is connected as a whole, controls anti-temper baffle by solenoid valve or electric control device The degree of reverse pressure provided during feeding keeps the density of the plugs coming out of the feeder within the required anti-tempering density range, and controls the anti-tempering baffle when the feeder stops feeding Reversely call back the remaining plug material, tightly close the plug tube, and play the role of preventing smoke and fire.

Further, described material plug pipe side has to poke material hole, poke material hole cover plate by detachable poke material hole cover plate, when needing to clea...

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Abstract

The invention discloses an anti-blocking method and equipment for biomass boiler worm feeder, wherein a length of feeding pipe is put to use in front of the biomass boiler worm feeder, the materials of the biomass boiler worm feeder are fed into the feeding trough through the feeding pipe and tempering of feeding trough is prevented by a stopper inside the feeding pipe. The length of feeding pipe is shortened in order to prevent blocking of the feeding pipe and the anti tempering baffle is set inside the feeding pipe as well. The rotary shaft that is designed as a whole with anti tempering baffle is set to control the turning of anti tempering baffle. The opening degree of anti tempering baffle can be adjusted by rotary shaft so that the density of feeding piece is increased when the feeding is in service and the ability to anti tempering baffle can be improved through the increased density of feeding piece, achieve the purpose of both effectively preventing the blocking and tempering.

Application Domain

ConveyorsFuel feeding arrangements +3

Technology Topic

Biomass boilerEngineering +2

Image

Examples

Experimental program(2)

Example Embodiment

[0035] Example one

[0036] It can be seen from the drawings that the present invention relates to an anti-clogging device for a biomass boiler screw feeder, which includes a biomass boiler screw feeder 1 and a plug tube 2. The inlet of the plug tube 2 is connected to the biomass boiler spiral The outlet of the feeder 1 and the outlet of the plug tube 2 are connected to the inlet of the feeding trough 3. According to the main reason for the material blocking caused by the feeder, the length of the plug tube is shortened and the screw push rod of the screw feeder is extended. The length of the modification measures, and open the material hole on the side of the material plug tube to reduce the difficulty of cleaning the material plug. At the same time, to avoid the reduction of the material plug anti-tempering function, the measures of anti-tempering baffle plus assembly weight and limit block are taken ,details as follows:

[0037] The material plug tube 2 is a shortened material plug tube, the screw feeder screw push rod length is extended by 200-300mm, and the material plug tube length is shortened by 200-300mm, changed from 1100mm to 800-900mm, so as to avoid the volume of the material plug block. Too large; a rotatable anti-tempering baffle 4 is installed in the material plug tube 2, and the rotating shaft 5 of the anti-tempering baffle 4 extends out of the material plug tube 2 and the rotating shaft that extends out of the material plug tube 2 5 is connected with a rotating mechanism 6 that controls the rotation of the anti-tempering baffle.

[0038] The rotating mechanism 6 is a pendulum type rotating mechanism. A rotating arm 7 is connected to the rotating shaft 5 of the anti-tempering baffle. The rotating arm 7 is fixedly installed on the rotating shaft 5 of the anti-tempering baffle through the mounting hole 13 A heavy hammer 8 is hung at the end of the boom 7; the heavy hammer 8 is hung in the end hanging hole 14 of the boom 7 through a wire rope or other hanging device 15; on the boom 7 is also provided The adjustment hole 16 for adjusting the hanging moment can be adjusted through the hanging holes at different positions.

[0039] During normal operation, the fuel is pressed into the plug tube 2 through the screw feeder 1, and then enters the feeding trough 3 through the plug tube 2; when feeding through the plug tube 2, the anti-return of the heavy hammer 8 is attached. The reverse pressure provided by the fire baffle increases the compactness of the plug block coming out of the feeder and improves the anti-backfire ability of the plug block, so that it can also effectively prevent backfire after the plug tube is shortened; When the feeder stops feeding, the anti-tempering baffle reverses the remaining plug under the action of the weight of the heavy hammer, and tightly closes the plug tube to prevent the backflow of smoke and fire.

[0040] The material plug tube 2 is a tapered tube, and the length of the tapered tube is 800-900 mm. By shortening the length of the material plug tube, the material blocking at the oblique plug tube is effectively prevented.

[0041] The material plug tube 2 is close to the bottom of the discharge end. The side of the material plug tube 2 is provided with a 200×100mm poke hole 9 which is covered by a detachable poke hole cover plate 10. When plugging the tube, it is only necessary to open the detachable poke hole cover plate 10 for cleaning, which is convenient for manual cleaning without stopping the furnace when the material is blocked; so as to reduce the difficulty of cleaning the plugging tube. The detachable spout hole cover plate 10 is connected to the spout hole 9 of the stopper tube 2 by a hinge device 11, and is locked by the locking device 12, so that the normally detachable spout hole cover plate 10 and the spout hole 9 are formed Sealed and closed.

[0042] Through field observation, it is found that the default value of the torque protection parameter of the feeder motor inverter is set too large, reaching 300%, and the inverter torque protection parameter must be adjusted according to the site conditions. After many tests, it is finally determined that the inverter torque protection parameter applicable to the fuel at the current stage is 80%, which can not only ensure the proper density of the plug formed by the feeder, play a role in preventing backfire, but also ensure The feeder can run continuously and stably without accidental jumping. Even when the material is blocked and the machine is tripped, the material block will not be too tight. The material block can be manually smashed at the material hole to ensure the continuous boiler Stable operation.

Example Embodiment

[0043] Example two

[0044] The second embodiment is the same as the basic principle of the first embodiment, but the structure is different. It is a biomass boiler screw feeder anti-blocking device, including the biomass boiler screw feeder and the plug tube, the inlet of the plug tube Connected to the outlet of the biomass boiler screw feeder, and the outlet of the plug tube is connected to the inlet of the feeding trough; the feature is that the plug tube is a shortened plug tube, and a rotatable plug tube is installed in the plug tube. The anti-tempering baffle, the rotating shaft of the anti-tempering baffle extends to the plug tube, and a rotating mechanism that controls the rotation of the anti-tempering baffle is connected to the rotating shaft that extends out of the plug tube.

[0045] The rotating mechanism is a solenoid valve or an electric rotating mechanism. A solenoid valve or an electric control device is connected to the rotating shaft of the anti-tempering baffle. The solenoid valve or the electric control device controls the anti-tempering baffle during feeding. The degree of reverse pressure provided keeps the density of the plug block coming out of the feeder within the required anti-tempering density range, and when the feeder stops feeding, the anti-tempering baffle is controlled to reverse back Pull out the remaining plug and close the plug tube tightly to prevent the backlash of smoke and fire.

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PUM

Property	Measurement	Unit
Length	800.0 ~ 900.0	mm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Guarantee continuous and stable operation
Reduce the probability of blockage

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Anti-blocking method and equipment for biomass boiler worm feeder

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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