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A solid powder continuous combustion device

A technology of combustion device and solid powder, which is applied in the direction of using combustion for chemical analysis, etc. It can solve the problems of short distance between the operator and the flame, simple ignition device, and poor controllability, so as to improve safety and reliability and avoid control Poor degree, the effect of improving safety

Active Publication Date: 2015-10-28
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to realize the continuous combustion of solid powder, coal gasification adopts a single nozzle, which has a large diameter and strong processing capacity, but the coal powder particles are large, which is not suitable for ultra-fine powder, and the large diameter is not conducive to explosion suppression; predecessors also used A device similar to a Bunsen burner is used to conduct laboratory-scale powder flame combustion performance research (Combustion and Flame, 1996, 105, 147; Combustion and Flame, 2003, 133, 275), but there are still (1) the tube diameter is too large and it is easy to temper ; (2) The outlet of the nozzle is a single tube, the flame shape and area are single, and it is difficult to study the characteristics of powder combustion in depth
On the basis of the above, Wang Qiuhong and others disclosed an open system injection premixed combustion test system (Chinese patent, CN102323374A). Explosive nozzle arrays are ignited by flame guns to achieve continuous combustion of powder flames in open spaces. However, the ignition device of this system is simple, and the distance between the operator and the flames is too close. Medium and high-speed transmission, collision will burn and explode in the pipeline, resulting in excessive danger of the system
In addition, in actual operation, the negative pressure formed by the injector will cause the powder volume and the frequency of the control motor to not be directly related, and the controllability is poor, and the powder with too large concentration is easy to temper

Method used

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  • A solid powder continuous combustion device
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Examples

Experimental program
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Effect test

Embodiment 1

[0022] The solid powder continuous combustion device of the present invention includes a powder bin 5, a combustion system, a power system, and a carrier gas transmission system. The device 1 controls the motor 2 and the reducer 3, and then controls the rotating speed of the screw; the carrier gas transmission system is composed of a carrier gas source 71, a buffer tank 7 and a solenoid valve 8, and the solenoid valve 8 controls the carrier gas flow rate; The powder bin is divided into upper and lower parts, the lower part is equipped with a screw 4, and the upper part is divided into a storage area 51, a buffer area 52 and a control area 53 by the first control partition 6 and the second control partition 61, The top of the storage area 51 has a feed inlet 24, and the bottom of the control area 53 has a discharge opening 25. The height of the second control partition 61 between the storage area 51 and the buffer zone 52 is less than the height of the first control partition 6;...

Embodiment 2

[0030] As described in Example 1, the powder material is prepared for combustion, and the spherical protective cover 18 and the chimney 19 are used to collect the powder produced by combustion through the product outlet 20, and finally obtain the zirconium-iron composite oxide material. Example 3

Embodiment 3

[0031] The diameter of the transmission pipeline 10 is 2 inches, the bending arc is 0.4, and the bending radius is 0.8m; the joints of the pipelines are smooth arcs. The mixing bin 11 has an aspect ratio of 2.0. The ignition furnace wire 16 has a power of 0.2Kw and forms a 3-sided shape on the outer edge of the nozzle array. The ignition furnace wire 16 is fixed by an insulating ceramic tube at 3 cm above the combustion chamber 14. The ignition furnace wire is controlled by a relay, and a 4A air switch is used for protection. All the other are with embodiment 1.

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Abstract

The invention discloses a continuous combustion device for solid powder, for overcoming the problems of low safety and controllable degree, in the existing device. The continuous combustion device for solid powder comprises a powder bin, a combustion system, a power system and a carrier gas transmission system. The working process of the continuous combustion device for solid powder disclosed by the invention is described as follows: pyrogenic powder in the powder bin is conveyed in an injector by a precession screw, a carrier gas is conveyed in a premixing bin through a transmission pipeline, and uniformly ejected in the form of an array through a spray tube, at this moment, an auxiliary gas system works, dust cloud ejected by a spray tube is mixed with an auxiliary gas, and ignited by an ignition furnace wire to continuously combust; a switch in each step is controlled by an automatic control system. With the adoption of the device disclosed by the invention, safe and controllable combustion of the solid powder is promoted.

Description

technical field [0001] The invention relates to a device for continuous combustion of solid powder. Background technique [0002] With the development of modern industry and the advancement of powder technology, dust is inevitably generated during industrial production, transportation and operation. These dusts, such as metal powders such as iron and aluminum, and mineral powders such as coal, are often flammable and explosive, which creates the problem of safety protection for combustible powders. Understanding the combustion and explosion characteristics of various combustible dusts and studying their flame propagation laws have important theoretical and practical significance for the safe production and use of powders. In addition to generating high temperature, the theoretical and experimental results in recent years have shown that the combustion of solids can also generate plasma, which has a strong absorption of 2-15 GHz microwaves (Strong Laser and Particle Beam 200...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/12
Inventor 徐耀吕宝亮李万喜王连成
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI