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Method and apparatus for generating gas pulses

A gas pressure pulse and gas technology, which is applied in the direction of cleaning methods, cleaning methods and utensils, and combustion methods using gas flow, which can solve problems such as difficulty in implementing inner surfaces, hardening of dust, and erosion of pipe surfaces.

Active Publication Date: 2006-09-27
NIRAFON OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter is a technique of dropping steel balls vertically from above and collecting them at the bottom of the device, which is difficult to implement and causes some damage to the inner surfaces
The disadvantage of steam blowing is that it often hardens the dust and causes erosion on the tube surface

Method used

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  • Method and apparatus for generating gas pulses

Examples

Experimental program
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Embodiment

[0049] have as figure 2 The combustion chamber of the configuration shown has a length of 560 mm, a diameter of 168 mm in the cylindrical part and a minimum diameter of 66 mm where the horn begins to open. The spark plug (3) is located at a distance from the round end ( figure 1 C) 84 mm, symmetrically arranged along the periphery of the combustion chamber, forming an angle of 120 degrees with each other. The overall length of the horn is 1340mm and it is provided with two different cones, the first 40mm-250mm and the second 250mm-350mm.

[0050] The combustible gas (driver gas) used is propane, which is mixed with air, and at an operating frequency of 10 Hz, a sound level of 170 decibels can be achieved by burning only 370 milligrams of propane per explosion.

[0051] In contrast, during earlier tests using a different combustion chamber with an elongated, substantially all the way cylindrical shape, 2000 mg of propane was burned per detonation to obtain the same acoustic ...

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Abstract

Method and apparatus of producing gas pressure pulses in a dust-deposit cleaning apparatus. The apparatus comprises a combustion chamber and an amplifying horn. According to the method a combustible gas and oxygen is fed into the combustion chamber, which has a generally elongated shape, the gas mixture is ignited for generating a pressure pulse, and the pressure pulse is released from the chamber and conducted to the amplifying horn. The gas mixture is ignited to generate an initial explosion which causes a pressure wave, which is reflected from the inner walls of the chamber end to form a collision zone, in which the initial explosion is at least partially transformed into a detonation. The combustion front is reflected from the gas inlet end and compressed at the other end of the chamber and released to the amplifying horn. By means of the invention, sound levels of about 165-170 dB can be produced at low fuel consumption.

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 for generating gas-phase pulses in a dust cleaning device comprising a combination of a combustion chamber and an amplifying horn. [0002] According to this method of the invention, a combustible gas and oxygen are fed into a generally elongate shaped combustion chamber having two opposite ends to form a combustible gas mixture which is ignited to generate a pressure pulse which is subsequently Released from the combustion chamber and conducted to the amplified horn for use in generating amplified pulses. [0003] The invention also relates to a device according to the preamble of claim 5 and a method of using the same according to the preamble of claim 9 . [0004] Both the method and the apparatus are particularly useful for generating amplified gas phase pulses (sound) which can be used to clean particulate deposits in industrial process equipment and power plants. Background t...

Claims

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Application Information

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IPC IPC(8): B08B7/02B08B5/00B08BB08B7/00F23C15/00F23JF28G7/00
CPCB08B7/0007B08B7/02F28G7/005F23C15/00F28G7/00A01K80/00
Inventor 保利·约凯拉基莫·萨沃莱宁
Owner NIRAFON OY
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