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Gas shock wave ash removing system equipped with Archimedes spiral accelerator

A technology of Archimedes spiral and acceleration device, which is applied in the field of ash removal device and boiler heating surface ash removal device, which can solve the problems of increased blockage, increased flue gas humidity, and insufficient removal of metal oxide dust to ensure Safe operation of equipment, efficient ash removal, and the effect of ensuring boiler heat exchange efficiency

Inactive Publication Date: 2009-06-24
李志强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that because the steam carries water, the humidity of the flue gas is increased, which provides conditions for the bonding of ash deposits, especially for high-calcium ash, and sometimes aggravates ash deposits and blockages
[0003] At present, China regards energy saving and emission reduction as an important indicator. A large number of waste heat from metallurgical furnaces are recovered to generate electricity. The dust will firmly adhere to the heat exchange surface of the waste heat boiler, but the current pulse ash removal system, the pulse generator basically uses a light tube, and the pulse energy generated is not enough to remove this metal oxide dust

Method used

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  • Gas shock wave ash removing system equipped with Archimedes spiral accelerator
  • Gas shock wave ash removing system equipped with Archimedes spiral accelerator
  • Gas shock wave ash removing system equipped with Archimedes spiral accelerator

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 As shown, the combustible gas and air enter the premixer 7 through the combustible gas pipeline 1, the combustible gas valve 2, the combustible gas flowmeter 3 and the air pipeline 4, the air valve 5, and the air flowmeter 6 respectively, and the premixed gas passes through the premixed pipeline 8 enters the deflagration chamber 10, the igniter 9 ignites the premixed gas to form a premixed flame and enters the deflagration chamber 10, and the Archimedes spiral disturbance device composed of obstacle pins 102 is arranged in the deflagration chamber 10, and the number of the pins 102 is in accordance with the deflagration 4-20 tubes are installed in the circumferential direction of the tube 101. Since the flame front and the Archimedes spiral disturbance device form a positive feedback mechanism, the flame is continuously accelerated and the pressure is continuously increased. Finally, the shock wave is ejected from the output tube and directly ac...

Embodiment 2

[0030] Embodiment 2: as figure 2 and if image 3 As shown, the deflagration tube 101 is generally cylindrical, and the pins 102 are evenly arranged on the inner wall of the deflagration tube 101 in the circumferential direction according to the Archimedes spiral, and the distance L between the Archimedes spirals on the inner wall of the deflagration tube 101 is 0.5- 2 times the diameter D of the deflagration tube 101 . The Archimedes spiral on the inner wall of the deflagration tube 101 disturbs the cone-shaped upper vertebral surface 104 with diameter d 1 It is 0.6-0.9 times the diameter D of the deflagration tube 101 . The Archimedes spiral on the inner wall of the deflagration tube 101 disturbs the cone-shaped lower vertebral surface 103 with diameter d 2 It is 0.1-0.3 times the diameter D of the deflagration tube 101 . 4-20 pins 102 are arranged in the circumferential direction of the deflagration tube 101 inner wall, and the pins 102 are perpendicular to the deflagra...

Embodiment 3

[0031] Embodiment 3: as Figure 4 As shown, different combustible gases produce different pressures after burning in the deflagration tube 101, such as methane, water gas, acetylene, hydrogen, etc., and the maximum pressure produced by the above-mentioned combustible gases in the deflagration tube 101 varies with the disturbance intensity. . Therefore, different combustible gases can be selected according to the firmness of the dust to achieve the best removal effect.

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Abstract

The invention provides a fuel gas shock wave ash disposal system equipped with an Archimedes spiral accelerating installation, comprising a combustible gas pipeline, a combustible gas valve, a combustible gas flow meter and an air duct, an air valve and an air flow meter; the combustible gas valve and the combustible gas flow meter are connected in sequence by the combustible gas pipeline, the air valve and the air flow meter are connected in sequence by the air duct, the combustible gas flow meter is connected with a premixer by the combustible gas pipeline, the air flow meter is connected with the premixer by the air duct, the right end of the premixer is connected with an igniter by a premixing pipeline, the igniter is connected with an Archimedes spiral explosion mixture space formed by arranging pins in the explosion tube, the explosion mixture space is connected with an output tube. In the invention, pins are arranged on the inner wall of the explosion tube according to the Archimedes spiral, thus forming a disturbed cone-type structure, therefore, pressure at the outlet of the explosion mixture space is greatly increased and fuel gas shock wave with powerful pulse energy is generated when cleaning ash of high viscosity and high adhesive attraction on a heat exchange surface, ensuring better ash removal effect.

Description

technical field [0001] The invention relates to an ash removal device for heating surfaces of boilers, in particular to a gas shock wave ash removal system equipped with an Archimedes spiral acceleration device. The utility model belongs to the technical field of an ash removal device for a heating surface of a boiler. Background technique [0002] The large heating area at the tail of coal-fired boilers in power stations has always been a relatively difficult problem to solve. Especially for boilers burning low-quality coal, because the ash content in the raw coal is too high and the calorific value is low, the combustion is extremely insufficient, and the problem of ash accumulation is more prominent, and in severe cases, it will cause major production accidents. The commonly used ash removal technology is to use high-pressure steam soot blowing. The principle is that the high-speed steam flow continuously destroys the adhesion between the ash and the solid surface throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23J3/00
Inventor 李志强
Owner 李志强
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