Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Device for preventing coal from burning spontaneously and rapidly extinguishing under coal mine and working method thereof

A coal spontaneous combustion and fire extinguishing device technology, applied in chemical instruments and methods, mixing methods, fire prevention, etc., can solve the problems of low foaming ratio, complicated manufacturing process, blockage, etc., and achieves easy plugging, compact structure, Use reliable effects

Inactive Publication Date: 2013-03-20
SHANDONG UNIV OF SCI & TECH
View PDF8 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device relies on the mixture of yellow mud, fly ash and other foams to protect the coal, so as to achieve the effect of preventing coal spontaneous combustion. Its shortcomings: First, the three-phase foam produced by the mixture of yellow mud and fly ash Particles and particle size are not uniform, and cannot be used for fire extinguishing and cannot completely block the contact between air and coal; second, the foaming ratio is low, only about 30 times, which has a certain effect on preventing coal spontaneous combustion in underground coal mines, and cannot realize rapid fire extinguishing in coal mines The third is that this kind of foam generator should be equipped with a barrier plate in the mixer, the manufacturing process is complicated, and it is easy to produce stagnation.
Its disadvantages are: compared with the patent No. 02148411.2, the barrier plate in the mixer is replaced with a central shaft with a long barrier piece and a short barrier piece. Low

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device for preventing coal from burning spontaneously and rapidly extinguishing under coal mine and working method thereof
  • Device for preventing coal from burning spontaneously and rapidly extinguishing under coal mine and working method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like figure 1 and figure 2 Shown, a kind of coal mine fire-preventing gel foam generating device, it comprises a cylindrical foam shell 3 that both ends shrink; There is a foam stock solution inlet 2, and the diameter of the compressed air pipe 1 is greater than the diameter of the foam stock solution inlet 2; the other end of the foam shell 3 is connected to a foam output pipe 4; the axis inside the foam shell 3 is provided with a hollow shaft 5, and Six sets of helical blades 7 are arranged at intervals on the shaft 5 , and the distance between them is the distance from the outer surface of the hollow shaft 5 to the inner surface of the foam shell 3 . Air outlet holes 6 are provided between the helical blades 7. In Embodiment 1, the rotation direction of the helical blades 7 and the axial angle of the hollow shaft 5 are 45 degrees. The rotation direction of each group of helical blades 7 is the same. The direction of rotation of the blades 7 is opposite; an auxilia...

Embodiment 2

[0026] The second embodiment is basically the same as the first embodiment, except that the included angle between the direction of rotation of the helical blade 7 and the axial direction of the hollow shaft 5 is 60 degrees. When in use, adjust the auxiliary compressed air pipeline 9 so that the flow ratio of the compressed gas entering the foaming shell 3 and the gel foam stock solution is 25:1, and 80 times the gel foam is formed after foaming.

Embodiment 3

[0028] Embodiment 3 is basically the same as Embodiment 2, except that eight sets of helical blades 7 are arranged at intervals on the hollow shaft 5, and the mesh diameter of the foam net is 2mm. When in use, adjust the auxiliary compressed air pipeline 9 so that the flow ratio of the compressed gas entering the foaming shell 3 and the gel foam stock solution is 30:1, and 120 times the gel foam is formed after foaming.

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a device for preventing coal from burning spontaneously and rapidly extinguishing under a coal mine and a working method thereof. The device comprises a cylindrical foamed shell of which the two ends contract, wherein one end of the foamed shell is connected with a compressed air line; one side of the compressed air line is provided with a foam stock solution inlet; the other end of the foamed shell is connected with a foam output pipeline; 6-8 groups of spiral blades are arranged on a hollow shaft of an axis in the foamed shell at certain intervals; air outlet holes are formed among the spiral blades; included angles between the turning directions of the spiral blades and the axial direction of the hollow shaft are 45-60 degrees; each group of spiral blades has the same turning direction; and two adjacent groups of spiral blades have opposite turning directions. A mixture is foamed twice, so that the foaming times are raised to 50-150 times rapidly within a short period of time, and the aims of preventing and controlling spontaneous turning of coal and rapidly extinguishing are fulfilled.

Description

technical field [0001] The invention relates to a device for preventing and controlling coal spontaneous combustion and a rapid fire extinguishing device, especially for preventing and controlling coal spontaneous combustion and a rapid fire extinguishing device for underground coal mines Background technique [0002] Under certain conditions, coal left in goafs in coal mines is prone to spontaneous combustion fires, and the effective way to extinguish them is to spray gel foam. [0003] The currently used foam generators mainly include mesh foamers for firefighting, which consist of an air compressor, a pressure vessel, a foaming cylinder with a metal grid and gas-liquid pipelines. This kind of foamer requires an external power source , Not suitable for underground fire prevention and extinguishing operations in coal mines. [0004] Patent No. 02148411.2 "Three-phase foam generating device for preventing spontaneous combustion of coal" applied by China University of Mining...

Claims

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/02B01F13/10B01F3/04
Inventor 展晓元陈连军王芳王敏
Owner SHANDONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com