KR20230036192A - A hybrid type combustor for VOCs - Google Patents

Abstract

The purpose is to provide a combustor for volatile organic compounds and harmful gases, which can efficiently utilize energy and realize complete combustion. The disclosed invention relates to a combustor for volatile organic compounds, comprising: a combustion chamber inner cylinder having a front end open; a combustion chamber outer cylinder concentrically surrounding the combustion chamber inner cylinder to form a conversion passage connected to the combustion chamber inner cylinder while forming an annular space therebetween and forming a flue at the front end of the combustion chamber inner cylinder; at least one combustion burner disposed in an area adjacent to the bottom surface of the combustion chamber inner cylinder and ejecting flame into the combustion chamber inner cylinder; and a VOCs inlet connected to the combustion chamber outer cylinder adjacent to the bottom surface of the combustion chamber inner cylinder and introducing VOCs into the annular space between the combustion chamber outer cylinder and the combustion chamber inner cylinder.

Description

Hybrid type combustor for VOCs}

The present invention relates to a combustion device capable of safely and energy-efficiently burning volatile organic compounds, which are harmful and toxic gases, generated in industrial sites.

Volatile Organic Compounds such as acetone, ethanol, acetaldehyde, toluene, and benzene (hereinafter referred to as "VOCs", hereinafter English abbreviations may be used interchangeably) and harmful gases exist in a gaseous state at room temperature and affect air quality. deteriorate and endanger human health. Most of the substances constituting volatile organic compounds generate irritating and unpleasant odors even at low concentrations, and are classified as carcinogens that cause disorders such as the nervous system when they come into contact with the human body or enter the respiratory tract.

Emission sources of VOCs include chemical product manufacturing facilities, food manufacturing facilities, organic solvent use facilities, painting facilities, laundromats, reservoirs, gas stations, and exhaust gases from various means of transportation. Movable pollutants such as Since it has a great impact on the environment and human body, most countries are making policy efforts to reduce emissions.

Combustion method (thermal oxidation method), biological treatment method, adsorption method, catalytic oxidation, and thermal regenerative combustion method are applied as treatment methods for volatile organic compounds. : Regenerative/Recuperative Thermal Oxidizer) is widely used not only in Korea but also abroad.

However, in order to completely burn various toxic gases of VOCs, a combustion decomposition environment such as an ultra-high temperature of 1,300 ° C or more and a gas residence time of several seconds is required. Development of a combustion furnace capable of realizing such a combustion environment is required.

Therefore, it is necessary to develop technology for a combustion device for volatile organic compounds that can efficiently utilize energy and realize complete combustion while realizing high-temperature combustion and sufficient combustion residence time.

Korean Registered Patent No. 10-0780231 (registered on November 21, 2007)

An object of the present invention is to provide a combustion device for volatile organic compounds and harmful gases capable of efficiently utilizing energy and realizing complete combustion.

The present invention relates to a combustion device for various noxious gases including volatile organic compounds, comprising: an inner cylinder of a cylindrical combustion chamber having an open end; and wrapping the inner cylinder of the combustion chamber concentrically to form an annular space therebetween while forming an inner cylinder of the combustion chamber. A combustion chamber outer cylinder forming a conversion passage connected to the combustion chamber and forming a flue at the tip of the combustion chamber inner cylinder; and at least one combustion burner disposed in an area adjacent to the bottom surface of the combustion chamber inner cylinder and ejecting flame into the combustion chamber inner cylinder. ; and a VOCs inlet connected to the combustion chamber outer cylinder adjacent to the bottom surface of the combustion chamber inner cylinder and introducing VOCs into an annular space between the combustion chamber outer cylinder and the combustion chamber inner cylinder.

In one embodiment of the present invention, the combustion burner ejects a flame along a tangential direction out of the center of the inner cylinder of the combustion chamber, so that the flame forms a spiral flow toward the flue.

And, the VOCs introduced through the VOCs inlet are preheated through the outer circumferential surface of the inner cylinder heated by the flame while flowing along the annular space, and the VOCs change direction in the conversion passage at the tip of the inner cylinder of the combustion chamber to reach the inner cylinder of the combustion chamber. It flows toward the combustion burner along the inner circumferential surface.

Here, the VOCs flowing along the inner circumferential surface of the inner cylinder of the combustion chamber form a heat protection layer that protects the inner circumferential surface of the inner cylinder of the combustion chamber from the flame.

Further, according to an embodiment of the present invention, an inclined surface for converging the flow of VOCs toward the combustion burner may be provided on an inner circumferential surface of the inner cylinder of the combustion chamber.

In addition, a spray nozzle for spraying water and air may be provided on the bottom surface of the inner cylinder of the combustion chamber.

Water and air sprayed from the spray nozzle are converted into plasma by the flame, and thus the VOCs are oxidized by reacting with oxygen radicals and hydroxyl radicals generated by the water and air.

In addition, an open cylindrical exhaust guide protruding toward the inner cylinder of the combustion chamber may be provided in a flue of the combustion chamber outer cylinder.

The volatile organic compound combustion device of the present invention having the above configuration enables complete combustion by preheating VOCs to a high temperature through a double-walled combustion chamber structure and then causing a combustion reaction, and an air curtain is provided on the inner circumferential surface of the combustion chamber. The formed flow of VOCs protects the inside of the combustion chamber from high-temperature radiant heat, thereby achieving a higher-temperature combustion environment and higher durability.

In addition, the hybrid type combustion by both flame and radical, which is achieved by further providing a spray nozzle for spraying water and air to the volatile organic compound combustion device of the present invention, completely burns volatile organic compounds and harmful gases more reliably, thereby reducing atmospheric pressure. It enables eco-friendly combustion that minimizes the emission of pollutants, thereby completely solving the problem of incomplete combustion, which is a problem of existing combustion, and maximizing energy efficiency.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the detailed description below.

1 is a view showing the configuration of a volatile organic compound combustion device according to the present invention.
2 is a view showing the arrangement structure of combustion burners;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless specifically defined explicitly. Terms used in this specification are for describing embodiments and are not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase.

As used herein, "comprises" and/or "comprising" means that a stated component, step, operation, and/or element is one or more other components, steps, operations, and/or elements. Existence or additions are not excluded.

1 is a diagram showing the configuration of a volatile organic compound combustion device 10 according to the present invention. The present invention will be described in detail with reference to the accompanying drawings. Here, the volatile organic compound combustion device 10 of the present invention is a device for burning various harmful gases including volatile organic compounds, and it is necessary to understand that VOCs are mentioned as representative of these various harmful gases. That is, the volatile organic compound combustion device 10 means a volatile organic compound and harmful gas combustion device.

The present invention relates to a volatile organic compound combustion device (10), and includes a combustion chamber for completely burning volatile organic compounds (VOCs) at a very high temperature. In the present invention, the combustion chamber has a dual structure of the combustion chamber inner cylinder 100 and the combustion chamber outer cylinder 200.

The combustion chamber inner cylinder 100 has a cylindrical structure with an open end. The combustion chamber inner cylinder 100 forms a space for burning volatile organic compounds, and is made of a heat-resistant material capable of maintaining sufficient durability even in high-temperature flames.

In addition, the outer cylinder 200 of the combustion chamber forms an annular space 230 therebetween while surrounding the inner cylinder 100 concentrically. In addition, a conversion passage 240 connected from the annular space 230 to the inner cylinder 100 is formed at the end of the outer cylinder 200 of the combustion chamber (the front end of the inner cylinder 100), and 210 is formed to discharge the exhaust gas. In addition, an open cylindrical exhaust guide 220 protruding toward the combustion chamber inner cylinder 100 is provided in the flue 210 of the combustion chamber outer cylinder 200 to facilitate exhaust gas discharge.

The combustion burner 300 generates a high-temperature flame by burning gas fuel such as LNG using air as an oxidizing agent. The combustion burner 300 is disposed in an area adjacent to the bottom surface of the inner cylinder 100 of the combustion chamber and ejects flame into the inner cylinder 100 of the combustion chamber. The combustion burner 300 is provided in an appropriate number of one or more to form a sufficient combustion temperature. In the illustrated embodiment of the present invention, a total of four combustion burners 300 are provided.

And, the combustion chamber outer cylinder 200 is provided with a VOCs inlet 400. The VOCs inlet 400 is installed in a region adjacent to the bottom surface of the combustion chamber inner cylinder 100, that is, close to the combustion burner 300. The VOCs inlet 400 connected to the combustion chamber outer cylinder 200 introduces VOCs into the annular space 230 between the combustion chamber outer cylinder 200 and the combustion chamber inner cylinder 100, and the power of the VOCs flowing by the VOCs blower 410 is made

2 is a view showing the arrangement structure of the combustion burner 300, in one embodiment of the present invention, the combustion burner 300 is arranged to eject flames along a tangential direction out of the center of the inner cylinder 100 of the combustion chamber there is. Accordingly, a turning force is applied to the flame ejected from the combustion burner 300 along the inner circumferential surface of the cylindrical inner cylinder 100, so that the flame spirals toward the flue 210 located at the tip of the inner cylinder 100 of the combustion chamber. will achieve

In addition, the VOCs introduced through the VOCs inlet 400 flow along the annular space 230, and the supply of VOCs through the VOCs inlet 400 is made in a state where the combustion burner 300 operates and the temperature of the combustion chamber sufficiently rises. will lose In this state, the VOCs flowing through the annular space 230 are preheated through the outer circumferential surface of the inner cylinder 100 heated by the flame, and change direction in the switching passage 240 at the tip of the inner cylinder 100 of the combustion chamber 100. ) flows toward the combustion burner 300 along the inner circumferential surface.

Here, as the spiral flow of flame is formed in the inner cylinder 100 of the combustion chamber, the VOCs introduced into the inner cylinder 100 of the combustion chamber form a kind of air curtain flowing along the inner circumferential surface of the inner cylinder 100 of the combustion chamber without diffusing. The flow of VOCs constituting the air curtain forms a heat protection layer that protects the inner circumference of the combustion chamber inner cylinder 100 against high-temperature flames, and is also heated to a high temperature of about 600° C. by the flames. VOCs heated to high temperatures are the basis for achieving ultra-high combustion temperatures.

After being sufficiently preheated, the VOCs introduced into the combustion chamber inner cylinder 100 reach the flame of the combustion burner 300 disposed on the bottom surface and cause a combustion reaction. Since the temperature of VOCs is sufficiently preheated to about 600 ° C, the combustion temperature is made of ultra-high temperature combustion of 1,300 ° C or more. In addition, since the combustion flame rises while forming a spiral, the combustion environment is maintained with sufficient time and temperature, through which VOCs can be completely decomposed.

And, according to the embodiment of the present invention shown in FIG. 1, the inner circumferential surface of the inner cylinder 100 of the combustion chamber is provided with an inclined surface 110 for converging the flow of VOCs toward the combustion burner 300. VOCs converging to the center of the flame along the slope 110 cause a more active combustion reaction.

Meanwhile, according to an embodiment of the present invention, a spray nozzle 500 for spraying water and air may be provided on the bottom surface of the inner cylinder 100 of the combustion chamber. Water and air supplied through the water supply pump 510 are sprayed from the spray nozzle 500 to the center of the flame in the form of a high-pressure spray. Water and air sprayed from the spray nozzle 500 are converted into plasma by the flame, and thus VOCs react with oxygen radicals and hydroxyl radicals generated by the water and air to further undergo oxidation.

In this way, if the volatile organic compound combustion device 10 of the present invention is further provided with the spray nozzle 500 for spraying water and air, hybrid combustion can be achieved by both flame and radical, and such a hybrid type Combustion of VOCs is completely burned more reliably, thereby enabling eco-friendly combustion that minimizes the emission of air pollutants, thereby completely solving the problem of incomplete combustion, which is a problem of existing combustion, and maximizing energy efficiency.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. you will be able to understand Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

10: volatile organic compound combustion device
100: Inner cylinder of combustion chamber 110: Inclined surface
200: combustion chamber outer tube 210: flue
220: exhaust guide 230: annular space
240: conversion oil 300: combustion burner
400: VOCs inlet 410: VOCs blower
500: spray nozzle 510: water supply pump

Claims (9)

Inner cylinder of a cylindrical combustion chamber with an open tip;
a combustion chamber outer cylinder wrapped concentrically around the combustion chamber inner cylinder to form an annular space therebetween, forming a flow path connected to the combustion chamber inner cylinder, and forming a flue at a tip of the combustion chamber inner cylinder;
at least one combustion burner disposed in an area adjacent to the bottom surface of the inner cylinder of the combustion chamber and ejecting flame into the inner cylinder of the combustion chamber; and
a VOCs inlet connected to the combustion chamber outer cylinder adjacent to the bottom surface of the combustion chamber inner cylinder and introducing VOCs into the annular space between the combustion chamber outer cylinder and the combustion chamber inner cylinder;
A volatile organic compound combustion device comprising a. According to claim 1,
The combustion burner ejects a flame along a tangential direction out of the center of the inner cylinder of the combustion chamber,
Accordingly, the volatile organic compound combustion device, characterized in that the flame forms a spiral flow toward the flue. According to claim 2,
The VOCs introduced through the VOCs inlet are preheated through the outer circumferential surface of the inner cylinder of the combustion chamber heated by the flame while flowing along the annular space,
The volatile organic compound combustion device, characterized in that the VOCs are changed in a direction in the switching passage at the tip of the inner cylinder of the combustion chamber and flow toward the combustion burner along the inner circumferential surface of the inner cylinder of the combustion chamber. According to claim 3,
VOCs flowing along the inner circumferential surface of the inner cylinder of the combustion chamber form a heat protection layer protecting the inner circumferential surface of the inner cylinder from the flame. According to claim 3,
A volatile organic compound combustion device, characterized in that an inclined surface for converging the flow of the VOCs toward the combustion burner is provided on an inner circumferential surface of the inner cylinder of the combustion chamber. According to claim 1,
A volatile organic compound combustion device, characterized in that a spray nozzle for spraying water and air is provided on the bottom surface of the inner cylinder of the combustion chamber. According to claim 6,
Volatile organic compound combustion device, characterized in that the water and air sprayed from the spray nozzle are converted into plasma by the flame. According to claim 7,
The VOCs are oxidized by reacting with oxygen radicals and hydroxyl radicals generated by the water and air. According to claim 1,
In the flue of the combustion chamber outer cylinder,
A volatile organic compound combustion device, characterized in that an open cylindrical exhaust guide protruding toward the inner cylinder of the combustion chamber is provided.

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