KR102653518B1 - Odor gas incineration device and incineration method using landfill gas or biogas - Google Patents

Abstract

The present invention provides an incineration device for incinerating odorous gases generated in a landfill or sewage treatment plant by utilizing combustible gas of landfill gas or biogas, comprising: a support frame built on the floor; a cylindrical incinerator fixed to the support frame and installed vertically on the floor; a cylindrical chimney installed at the top of the cylindrical incinerator to discharge exhaust gas combusted by ignition; A combustible gas supply pipe installed at the bottom of the cylindrical incinerator and connected to supply combustible gas of landfill gas or biogas within the combustion area, and a plurality of combustible gas supply pipes installed in a radial shape at the ends of the combustible gas supply pipe connected to the bottom of the cylindrical incinerator. A burner composed of a porous nozzle pipe, equipped with an ignition gas pipe connected to an igniter and a combustible gas supply pipe, and ignited by an electrode; A combustible gas supply pipe connected to supply odor gas, which is a combustible gas, and air within the combustion area, and a combustible gas deodorizing duct when odor gas, which is a combustible gas, is insufficient or when the concentration of carbon monoxide (CO) in the exhaust gas is high. an air blowing pipe connected to supply auxiliary air to the air blower; A diffuser installed close to the burner so that the mixed gas of the combustible gas of landfill gas or biogas and the odor gas, which is an auxiliary combustible gas, forms a vortex while spreading in the combustion area. Landfill gas or biogas comprising a. This relates to an odorous gas incineration device, which has the effect of efficiently treating odorous gases by utilizing landfill gas or biogas generated from landfills, sewage treatment plants, etc.

Description

Odor gas incineration device and incineration method using landfill gas or biogas}

The present invention relates to an incineration device and incineration method for incinerating odorous gases generated in landfills, sewage treatment plants, etc., and more specifically, to anaerobic digestion tanks such as landfill gas (LFG) generated in landfills or sewage treatment plants. This relates to an odorous gas incineration device and method for incinerating in a cylindrical incinerator by using biogas generated in a combustible gas and using odorous gases generated in landfills or sewage treatment plants as a combustible gas.

The composition of pollutants in wastewater treatment plants, food treatment plants, livestock wastewater treatment plants, sludge incineration and drying facilities, waste landfills, etc. varies greatly depending on the substance or source, and the main odor-causing substances include hydrogen sulfide, mercaptan, etc. These include sulfur compounds, ammonia, and nitrogen compounds such as amines.

If odorous gas containing odor-causing substances is not properly treated and released to the outside at these treatment plants and landfills, it may cause complaints from nearby residents, and if the odor emission permissible standards are exceeded, administrative measures may be taken by administrative agencies. .

The odor components are generally removed by being converted to water and carbon dioxide, and the odor gas treatment technologies currently in use include physical and chemical deodorization methods such as activated carbon adsorption, chemical cleaning, ozone oxidation, and combustion deodorization, and soil microorganisms. There are biological deodorization methods such as treatment method, activated sludge method, and biofilter.

In order to treat odorous gases in landfills or sewage treatment plants, conventionally, Domestic Patent Publication No. 10-1001155 (announced on December 15, 2010, hereinafter referred to as 'Prior Art 1') "Integrated multi-stage chemical solution for removing high-concentration complex odors. “Cleaning device” and Domestic Patent Publication No. 10-1588829 (announced on January 26, 2016, hereinafter referred to as “prior art 2”) “Deodorization system using a chemical cleaning single tower that simultaneously purifies acidic and alkaline odors” and Similarly, chemical cleaning that is easy to handle and maintain is widely used, but the chemical cleaning of prior art 1 and 2 has problems with operating costs such as chemical and material costs, and requires treatment of wastewater generated after chemical cleaning.

In addition, depending on the processing environment, they may be used alone or in combination of two or more. Domestic Patent Publication No. 10-1183090 (announced on September 20, 2012, hereinafter referred to as 'Prior Art 3') "Complex for treating odor gas In the “bio deodorization device,” odorous gases are passed through a three-stage composite bio deodorization device equipped with a wet cleaning device, primary and secondary biofilters, and a chemical cleaning device, and the odorous gases are deodorized through physical, biological, and chemical deodorization processes. It is processed sequentially, but this prior art 3 has the problem that the odorous gas treatment process is too complicated, a large site area is required due to the application of a biological deodorization method, and power costs are high due to high pressure loss.

Meanwhile, biogas generated during the anaerobic digestion process of organic matter such as landfill gas or sewage sludge from landfills accounts for the majority of _CH4 at 40-90% and _CO2 at 10-60%, with the remaining less than 2% remaining. It consists of trace elements such as carbon monoxide, ammonia, and hydrogen sulfide, and when landfill gas (LFG) or biogas, which is surplus gas remaining after use as fuel in power generation facilities or boilers, is released into the atmosphere, it causes air pollution. Complaints are raised in the vicinity due to the foul odor, and in the case of flammable gas, there is a risk of explosion and fire, so it is necessary to dispose of it by incineration.

In this regard, the "surplus gas treatment device" previously proposed by the present applicant in Domestic Patent Publication No. 10-1981215 (announced on May 22, 2019, hereinafter referred to as 'Prior Art 4') is fixed to a support frame installed vertically on the floor. A cylindrical combustion furnace, a cylindrical chimney installed at the top of the cylindrical combustion furnace so that the exhaust gas generated by combustion of surplus gas within the cylindrical combustion furnace is discharged into the atmosphere, and a cylindrical combustion furnace so that surplus gas can be supplied into the cylindrical combustion furnace. A gas supply pipe installed at the bottom of the furnace, a plurality of porous nozzle pipes installed radially at the end of the gas supply pipe located in the cylindrical combustion furnace, an ignition gas pipe and an ignition electrode disposed near the porous nozzle pipe, and , a diffuser disposed above a plurality of porous nozzle pipes so that the surplus gas supplied into the cylindrical combustion furnace passes through a plurality of blades to form and spread a vortex, and air surrounding the gas supply pipe with a built-in rectifier plate. By having a structure with a chamber, the flame can be stably maintained without being deflected to one side and the effect of achieving complete combustion of excess gas can be exhibited.

In addition, by improving the performance of the above prior art 4, the present applicant previously proposed Domestic Patent Publication No. 10-2226636 (announced on March 11, 2021, hereinafter referred to as ‘prior art 5’) “low-nox surplus gas combustion equipment” (i) the time that the mixed gas of combustible gas and combustible gas stays in the combustion area increases, (ii) when the mixed gas is burned, the combustible gas is replenished at an appropriate timing, and (iii) the operation of combustion equipment is increased. When the flame is pushed by the continuously supplied airflow of the mixed gas, the flame can be formed in the central part of the combustion area without being deflected to one side, and (iv) the mixed gas or combustion gas does not swirl around the diffuser. By forming (eddy), complete combustion of the mixed gas can be achieved and NOx in the exhaust gas emitted into the atmosphere can be reduced, leading to low-NOx combustion, complete combustion, improved durability of equipment, and reduced environmental load. There is something that can be effective.

However, the above prior arts 4 and 5 are devices that mainly incinerate biogas generated during the anaerobic digestion process of organic matter such as landfill gas or sewage sludge from landfills, and use air as an auxiliary gas to remove odor-causing substances. There was a problem of not considering the treatment of odorous gases contained therein.

Therefore, there is an urgent need for a device that can efficiently incinerate odorous gases together with landfill gas or biogas without the need to chemically clean the odorous gases generated in large quantities in landfills, sewage treatment plants, etc.

The purpose of the present invention is to solve the problems of the above-mentioned background technology, and to create a odor system that can efficiently incinerate a large amount of odorous gas while utilizing a small amount of landfill gas or biogas generated from landfills, sewage treatment plants, etc. The purpose is to provide a gas incineration device.

Another object of the present invention is to provide an economical odor gas incineration device that does not require separate operation of an air blower during normal operation by using odor gas as an auxiliary gas to incinerate combustible landfill gas or biogas.

Another object of the present invention is to install a baffle on the inner side of the top of the cylindrical incinerator to increase the time that the mixed gas of landfill gas, biogas, and odor gas stays within the combustion area for the exhaust gas emitted after combustion. The purpose is to provide a odor gas incineration device that can prevent civil complaints due to air pollution and odor when released to the outside without permission by providing combustion technology that can increase the temperature inside the furnace and achieve complete combustion of combustible gas.

Another object of the present invention is to provide a odorous gas incineration method that can efficiently treat odorous gas along with landfill gas or biogas using an odorous gas incineration device utilizing landfill gas or biogas generated from landfills, sewage treatment plants, etc. It is provided.

The purpose and advantages of the present invention will become clearer from the following description, claims, and drawings.

The odor gas incineration device using landfill gas or biogas according to the present invention to achieve the above purpose is,

In an incineration device that uses combustible gas from landfill gas or biogas to incinerate odorous gases generated in landfills or sewage treatment plants,

A support frame built on the floor; a cylindrical incinerator fixed to the support frame and installed vertically on the floor; a cylindrical chimney installed at the top of the cylindrical incinerator to discharge exhaust gas combusted by ignition; a combustible gas supply pipe connected to the lower part of the cylindrical incinerator to supply combustible gas of landfill gas or biogas into the combustion area; The end of the combustible gas supply pipe connected to the lower part of the cylindrical incinerator is composed of a plurality of porous nozzle pipes installed in a radial shape, and an ignition gas pipe connected to the ignitor and the combustible gas supply pipe is installed and ignited by an electrode. with burner; a combustible gas deodorization duct connected to an odorous gas supply pipe to supply odorous gas, which is a combustible gas, into the combustion area; an air blowing pipe connected to the combustible gas deodorization duct to supply auxiliary air to the air blower when there is a shortage of odor gas, which is a combustible gas, or when the concentration of carbon monoxide (CO) in the exhaust gas is high; A plurality of direction guide pieces are inclined and radially arranged and installed close to the burner so that the mixed gas of combustible gas of landfill gas or biogas and odorous gas, which is an auxiliary gas, can form and spread a vortex as it spreads in the combustion area. With a diffuser; A baffle is installed on the upper inner surface of the cylindrical incinerator to allow the exhaust gas discharged after combustion of the combustible landfill gas or biogas and the odorous gas mixture to remain within the combustion area. It is installed around the circumference in a circumferential direction to delay the atmospheric release time, thereby increasing the temperature within the furnace and inducing complete combustion of the combustible gas.

In the odor gas incineration device of the present invention, the heating temperature in the combustion area of the cylindrical incinerator is 750 ℃ to 800 ℃, at which odor gas can be decomposed, and the inflow amount of landfill gas or biogas, which is a combustible gas, and the odor gas, which is an auxiliary combustible gas, are adjusted. Combustion must be done according to the inflow amount at a certain rate. The carbon monoxide (CO) concentration is measured with a gas analyzer at the carbon monoxide (CO) and oxygen (O ₂₎ concentration measuring port at the top of the cylindrical incinerator. When the CO concentration is high and there is a shortage of odorous gas, odorous gas is used. It is characterized by adjusting the opening rate of the blocking valve installed in the supply pipe or auxiliary operating the air blower to adjust the air ratio.

The odorous gas incineration device of the present invention also has a baffle (baffle) on the upper inner side of the cylindrical incinerator that allows the exhaust gas discharged after combustion of the combustible landfill gas or biogas and the mixed gas of the odorous gas to stay within the combustion area. Baffle) is installed circumferentially on the upper inner surface of the cylindrical incinerator, and is installed circumferentially at an angle of 35 degrees to the direction in which the exhaust gas is discharged.

The odorous gas incineration device of the present invention is also composed of a refractory material on the inner circumferential wall of the cylindrical incinerator, and fire bricks and insulating bricks are stacked on the upper and lower parts of the baffle for heat storage in the cylindrical incinerator. It is characterized by the fact that CERAKWOOL is placed on the baffle as a fireproof material.

In the odorous gas incineration device of the present invention, the diffuser is a perforated plate with a plurality of mixed gas passages, and provides direction guidance that causes the mixed gas passing through the mixed gas passages to rotate clockwise or counterclockwise within the combustion area. It is characterized in that a side is provided for each mixed gas flow path.

The odor gas incineration device of the present invention is also provided with a rectifying plate installed to maintain the combustion flame stably without being deflected to one side by supplying the odor gas, which is a combustible gas, in a rectified manner inside the combustible gas deodorization duct. It is characterized by having

In the odorous gas incineration device of the present invention, a metal mesh is installed between the flanges, which are the connecting portions of the combustible gas supply pipe, to filter out impurities contained in the gas, and a flashback preventer is provided to prevent flashback of the gas. It is characterized by

The odorous gas incineration device of the present invention also has a carbon monoxide (CO) and oxygen (O ₂ ) concentration measuring port installed on the upper part of the baffle, and a natural gas incinerator with a space formed between the top of the cylindrical incinerator and the cylindrical chimney. It is characterized in that a natural cooling type temperature reduction device is installed so that the heated exhaust gas is cooled and discharged to the outside as external air is introduced by the device.

In another aspect of the present invention, the method of incinerating odorous gas using landfill gas or biogas involves incinerating odorous gas with landfill gas or biogas using the odorous gas incineration device using landfill gas or biogas according to the present invention. An odorous gas is used as a combustible gas to burn landfill gas or biogas in a cylindrical incinerator. The incineration temperature of the odorous gas in the combustion area of the cylindrical incinerator is 750°C to 800°C, and combustible gas is placed on the inner surface of the top of the cylindrical incinerator. A baffle, which allows the exhaust gas discharged after combustion of landfill gas or biogas and odorous gas to remain in the combustion area, is installed around the circumference at an angle to the direction in which the exhaust gas is discharged to remove the exhaust gas. It is characterized by delaying the release time of the gas to the atmosphere, thereby increasing the temperature inside the furnace and inducing complete combustion of the combustible gas.

Accordingly, the odorous gas incineration device and incineration method of the present invention were intended to efficiently incinerate odorous gases by utilizing landfill gas or biogas generated in landfills, sewage treatment plants, etc.

The odor gas incineration device of the present invention efficiently incinerates a large amount of odor gas by using a small amount of landfill gas or biogas as combustible gas without the need to clean the odor gas generated in large quantities in landfills, sewage treatment plants, etc. By doing so, the fields of use of landfill gas or biogas can be further diversified, and it has the effect of preventing civil complaints due to air pollution and odor when landfill gas, biogas, or odorous gas is released to the outside without permission.

In addition, the odorous gas incineration device of the present invention uses odorous gas as a combustible gas to incinerate combustible landfill gas or biogas, thereby economically reducing operating costs by eliminating the need to separately operate an air blower during normal operation.

In addition, the odorous gas incineration device of the present invention installs a baffle on the upper inner surface of the cylindrical incinerator to allow the exhaust gas to remain within the combustion area, thereby delaying the atmospheric release time, increasing the temperature inside the furnace and reducing the combustible gas. By inducing complete combustion, the emission of carbon monoxide (CO) into the atmosphere can be minimized, which has the effect of greatly reducing the environmental load.

Figure 1 is a diagram showing the process piping of an odorous gas incineration device according to an embodiment of the present invention.
Figure 2 is a schematic diagram showing the front of an odorous gas incineration device according to an embodiment of the present invention.
Figure 3 is a schematic diagram showing a plan view of an odorous gas incineration device according to an embodiment of the present invention.
Figure 4 shows the arrangement of combustible gas supply pipes, burners, diffusers, air blowing pipes, and odorous gas supply pipes mounted at the bottom of the cylindrical incinerator according to an embodiment of the present invention, and is borrowed from Figure 2 of Prior Art 4. This is the drawing shown.
Figure 5 shows the arrangement of combustible gas supply pipes, burners, diffusers, air blowing pipes, and odorous gas supply pipes mounted at the bottom of the cylindrical incinerator according to an embodiment of the present invention, and is borrowed from Figure 4 of Prior Art 4. This is the drawing shown.

Hereinafter, the present invention will be described in detail.

Prior to this, terms or words used in the description and claims of the present invention should not be construed as limited to their usual or dictionary meanings, and the inventor used the concept of terms to explain his invention in the best way. It must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be appropriately defined.

The terminology used herein is only intended to refer to specific embodiments and is not intended to limit the invention. As used herein, singular forms include plural forms unless phrases clearly indicate the contrary.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology or configuration related to the present invention may obscure the gist of the present invention, the detailed description will be omitted.

In the present invention, biogas is a gas produced by decomposition of organic waste resources such as food waste, livestock manure, and sewage sludge by microorganisms in the absence of air (anaerobic condition). This biogas contains the largest amount of methane, carbon dioxide, and small amounts of hydrogen and hydrogen sulfide. There are differences in the composition of the biogas produced depending on the type of organic matter and digestion conditions.

Landfill gas (LFG) is a gas generated by anaerobic decomposition of organic materials among the landfilled waste after filling the ground with waste in a landfill. It is also called landfill gas and is a type of biogas and a component of landfill gas. Methane and carbon dioxide, which are global warming substances, account for more than 98%, and the remaining 2% contains odor-causing substances such as hydrogen sulfide and mercaptan. Therefore, if landfill gas is collected and incinerated or used as power generation fuel, a lot of greenhouse gases are produced. Reduction performance can be secured.

Bad odor is an unpleasant and disgusting smell caused by irritating gaseous odor-causing substances such as hydrogen sulfide, ammonia, methyl mercaptan, and amines.

Sewage treatment plants are one of the main sources of odor, and various odor gases are generated from sewage drains, manholes, indoor drainage facilities, soil deposits, silt basins, screens, septic tanks, thickening tanks, and sludge drying facilities.

Odor gas contains some odor components, but since it is mostly air, it can be used as a combustible gas instead of air, and the odor can be removed by combustion at 750-800°C.

In the present invention, landfill gas or biogas is used as a combustible gas, and odorous gas generated from odor-generating sources such as landfills and sewage treatment plants is used as a combustible gas. When excess gas and odorous gas from landfill gas or biogas generated from landfills, sewage treatment plants, etc. are discharged to the outside without being treated, air pollution and civil complaints due to odor occur and must be treated. However, in the present invention, odorous gas Instead of chemical cleaning, landfill gas or biogas can be used as a combustible gas, and odorous gas can be used as a combustible gas instead of air for efficient incineration.

In the present invention, by using a diffuser, baffle, and high-temperature refractory material in combination, a large amount of odorous gas can be incinerated with a small amount of landfill gas or biogas.

In the case of an existing landfill's odor gas combustion facility, if 30 Nm ³ /min of landfill gas was used to incinerate 200 Nm ³ /min of odor gas, the same amount of odor gas can be burned by using only 15 Nm ³ /min through the above invention. It was incinerated.

Therefore, the 15 Nm ³ /min of landfill gas saved at the landfill can be usefully used for other purposes such as power generation, and on the other hand, it is possible to reduce operating costs such as electricity bills by not operating the air blower during normal operation.

However, in the present invention, the carbon monoxide (CO) concentration is measured with a gas analyzer at the carbon monoxide (CO) and oxygen (O ₂ ) concentration measuring port at the top of the cylindrical incinerator, and when the supply of odorous gas is insufficient due to the high CO concentration, the odor gas supply pipe is installed. By adjusting the opening rate of the blocking valve or operating an auxiliary air blower to match the air ratio, complete combustion and exhaust gases can be safely released into the atmosphere.

In the odorous gas incineration device of the present invention, in addition to having a heat storage function by the refractory bricks and insulating bricks disposed on the circumferential wall of the cylindrical incinerator, the exhaust gas can remain within the combustion area on the inner surface of the upper end of the cylindrical incinerator. A baffle is installed circumferentially around the upper inner surface of the cylindrical incinerator to delay the release time of the exhaust gas into the atmosphere, increasing the temperature inside the furnace and inducing complete combustion of combustible gas, thereby reducing the risk of waste generated in landfills, etc. While a small amount of landfill gas is used to efficiently incinerate a large amount of odorous gas, measurement with an internal temperature sensor shows that the temperature condition of 750-800℃, which is the temperature condition for combusting odorous gas, is efficiently maintained.

Although odorous gas contains some odorous components, the oxygen concentration of odorous gas is 15-20%, which is slightly lower than that of general air. However, if an excessive amount of odorous gas is used ( ^200Nm3 /min compared to ^15Nm3 /min of landfill gas), landfill gas is completely destroyed. The amount of oxygen for combustion is sufficient.

In the case of the landfill, the description of landfill gas can also be applied to biogas from sewage treatment plants, etc.

Meanwhile, in the present invention, a carbon monoxide (CO) and oxygen (O ₂ ) concentration measuring port is installed at the upper exit side of the cylindrical incinerator to measure the CO and O ₂ concentrations contained in the exhaust gas through a gas analyzer to completely prevent CO from being emitted as much as possible. Designed to burn. If there is a lot of odor gas, there is a lot of _O2 , and if there is a lack of odor gas, landfill gas or biogas is incompletely burned and CO is emitted. When there is a shortage of odorous gas or when the concentration of carbon monoxide (CO) in the exhaust gas is high, air can be supplied by adjusting the opening rate of the blocking valve installed in the odorous gas supply pipe or by separately operating an auxiliary air blower. .

In addition, a baffle, which allows exhaust gas to remain within the combustion area, is installed on the inner surface of the top of the cylindrical incinerator so that the exhaust gas can stay in the combustion area so as to be inclined in the circumferential direction. By installing it around the circumference at an angle of 35 degrees toward the direction in which the gas flows, it delays the release time of the exhaust gas into the atmosphere, increasing the temperature inside the furnace and inducing complete combustion of the combustible gas more appropriately.

The inner circumferential wall of the cylindrical incinerator is composed of refractory material, and fire bricks are placed on the upper and lower parts of the baffle to store heat within the cylindrical incinerator to maintain the temperature of 750 to 800°C, which is the temperature condition for combustion of odorous gas. and insulating bricks are stacked, and CERAKWOOL is placed on the baffle as a fireproof material.

CERAKWOOL is a fire-resistant insulating material made of high-purity silica and alumina that can stably withstand ultra-high temperatures of over 1000°C during steel production and when exposed to direct flame. In order to delay the atmospheric release time of high-temperature exhaust gas generated when the mixed gas of gas and odorous gas is burned and allow it to remain within the combustion area, an ultra-high temperature refractory material such as CERAKWOOL is needed.

In the present invention, a burner and diffuser in which a mixed gas of landfill gas or biogas, which is a combustible gas, and odor gas, which is an auxiliary gas, burns in the incineration area at the bottom of the cylindrical incinerator, and a burner and diffuser that come into contact with high-temperature exhaust gas on the inner surface of the top of the cylindrical incinerator. The baffle is made of stainless steel (STS) 310S, which has strong heat resistance. Stainless steel (STS) 310S is a steel type that has increased Cr and Ni content, has good heat resistance, excellent processability, and weldability, and can be used at high temperatures.

The odor gas incineration device of the present invention can be used as a bypass facility for a separate line instead of the chemical cleaning device, so it can be utilized during maintenance of the chemical cleaning device. When the odor gas incineration device of the present invention is used together with the chemical cleaning device, the chemical By lowering the operation rate of the cleaning device, the amount of chemical cleaning solution used and wastewater generation can be greatly reduced.

Hereinafter, a preferred embodiment of the odorous gas incineration device according to the present invention will be described in detail with reference to the attached drawings. The following examples are merely illustrative for illustrating the present invention and are not intended to limit the scope of the present invention.

1 to 5 are the same as brief descriptions of the drawings described previously.

The attached drawings show an embodiment in which the technical idea of the present invention is applied to an odor gas incineration device, and some of the attached drawings of prior art 4 are borrowed except for FIGS. 1, 2, and 3, and this embodiment is an improvement in the structure of the surplus gas treatment device disclosed in Prior Art 4 so that landfill gas or biogas, which is a combustible gas, can be used for efficient incineration by using odorous gas instead of air as an auxiliary gas.

Therefore, detailed description of some of the components that can be identified from the disclosure of Prior Art 4 will be omitted.

<Odor gas incineration device using landfill gas or biogas>

Figure 1 is a diagram showing the process piping of a malodor gas incineration device according to an embodiment of the present invention, and Figure 2 is a schematic diagram showing the front of a malodor gas incineration device according to an embodiment of the present invention.

As can be seen from FIG. 1, the odor gas incineration device using landfill gas or biogas according to an embodiment of the present invention uses landfill gas (LFG, Landfill Gas) as a combustible gas at the bottom of a vertically installed cylindrical incinerator 120. B. Biogas is supplied through the combustible gas supply pipe 140, and a flashback preventer 145 is installed in the combustible gas supply pipe 140 to protect the shearing equipment (gas storage tank, etc.) in case of emergency (in case of flame backflow). Block the flame in the combustion area. Landfill gas or biogas produces CH ₄ As it is a flammable gas, a flashback preventer (145) is necessary because incidents such as fire or explosion may occur when the flame flows back.

In addition, an odorous gas supply pipe 200 is connected to the other side of the bottom of the cylindrical incinerator 120 to supply odorous gas, and an air blower 220 is connected to the air blowing pipe 230.

A controller 320 is connected between the cylindrical incinerator 120 and each of the combustible gas supply pipes 140, odorous gas supply pipes 200, and air blowing pipes 230 to adjust and control the opening rate. A shutoff valve (105) is installed.

Figures 4 and 5 show the arrangement of combustible gas supply pipes, burners, diffusers, air blowing pipes, and odorous gas supply pipes mounted at the bottom of the cylindrical incinerator according to an embodiment of the present invention, and Figure 5 shows a flashback preventer ( In a specific embodiment of 145), a metal mesh 280 is installed between the flanges 270, which are connecting portions of the combustible gas supply pipe 140, to filter out impurities contained in the gas and prevent backfire of the gas. It is provided for you to use.

As can be seen from FIGS. 2, 4, and 5, the odor gas incineration device using landfill gas or biogas according to an embodiment of the present invention includes a support frame 110 built on the floor 100, and ; A cylindrical incinerator (120) fixed to the support frame (110) and installed vertically on the floor; A cylindrical chimney (130) installed at the top of the cylindrical incinerator (120) to discharge exhaust gas combusted by ignition; A combustible gas supply pipe 140 connected to the lower part of the cylindrical incinerator 120 to supply combustible gas such as landfill gas or biogas into the combustion area; The end of the combustible gas supply pipe 140 connected to the lower part of the cylindrical incinerator 120 is composed of a plurality of porous nozzle pipes 150 installed in a radial shape, and includes an ignitor 160 and a combustible gas supply pipe 140. ) and a burner 190 equipped with an ignition gas pipe 170 connected to the ignition electrode 180; a combustible gas deodorization duct 210 to which an odorous gas supply pipe 200 is connected to supply odorous gas, which is a combustible gas, into the combustion area; An air blowing pipe (230) connected to the combustible gas deodorizing duct (210) to supply auxiliary air to the air blower (220) when there is a shortage of odor gas, which is a combustible gas, or when the concentration of carbon monoxide (CO) in the exhaust gas is high. class; A plurality of direction guide pieces 240 are inclined and radially arranged so that the mixed gas of the combustible gas of landfill gas or biogas and the odor gas, which is an auxiliary combustible gas, can form and spread a vortex while spreading in the combustion area, so that the burner ( A diffuser 250 installed close to 190); On the upper inner surface of the cylindrical incinerator, a baffle (300) is installed to allow the exhaust gas discharged after combustion of the combustible landfill gas or biogas and the odorous gas mixture to remain within the combustion area. The basic feature of its technical composition is that it is installed circumferentially around the inner surface of the top of the furnace to delay the release time to the atmosphere, thereby increasing the temperature inside the furnace and inducing complete combustion of combustible gas.

The floor surface 100 may be the ground, the floor of a building, or a pavement formed by pouring concrete, etc. on the ground.

The support frame 110 may be a steel structure such as section steel or a steel pipe, or a building made of building materials such as bricks, and is fixed to the floor surface 100.

The cylindrical incinerator 120 is fixed to support frames 110 and mounted vertically on the floor.

In the present invention, a cylindrical incinerator 120 is used, but manufacturing in other shapes can also be fully considered.

The upper part of the cylindrical incinerator 120 is covered with a cylindrical chimney 130 so that the exhaust gas from which the mixed gas is combusted can be discharged into the atmosphere.

The inner peripheral wall 125 surrounding the internal combustion area of the cylindrical incinerator 120 may be composed of a refractory material.

In one embodiment of the present invention, refractory materials and insulation materials are disposed on the inner circumferential wall 125 of the cylindrical incinerator 120, and refractory bricks and Insulating bricks are stacked and arranged, and Cerakwool is placed as a fireproof material in the baffle 300.

CERAKWOOL is a fire-resistant insulating material made of high-purity silica and alumina that can stably withstand ultra-high temperatures of over 1000°C during steel production and when exposed to direct flame. In order to allow the high-temperature exhaust gas generated when the mixed gas of gas and odorous gas is burned to remain within the combustion area, an ultra-high temperature refractory material such as CERAKWOOL is required.

As can be seen from FIGS. 2, 4, and 5, the combustible gas supply pipe 140, which supplies combustible landfill gas or biogas into the combustion area of the cylindrical incinerator 120, is located on the lower side of the cylindrical incinerator 120. It is installed in and consists of a plurality of porous nozzle pipes (150) installed in a radial shape near the outlet side of the combustible gas supply pipe (140), an igniter (160) and a combustible gas supply pipe (140). The connected ignition gas pipe 170 is mounted and a burner 190 ignited by the electrode 180 is installed.

That is, the porous nozzle pipes 150 are equipped with an ignition gas pipe 170 connected to the igniter 160 and the gas supply pipe 140, and the ignition gas pipe 170 is ignited by the electrode 180. It is structured so that it can be done.

The combustible gas supply pipe 140, in a specific embodiment, consists of a first gas supply pipe 140a and a second gas supply pipe 140b, and the first and second gas supply pipes 140a and 140b. It is configured to properly adjust the supply amount of gas suitable for low combustion and high combustion by the first, second, and third valves 105a, 105b, and 105c mounted on the.

A diffuser 250 is mounted on the combustible gas supply pipe 140 and the plurality of porous nozzle pipes 150, and inclined direction guide pieces 240 are formed on the diffuser 250 to form the diffuser 250. It is designed to eddy and diffuse the combustible gas discharged through the gas.

As shown in FIG. 5, the diffuser 250 has a disk shape with a plurality of mixed gas passages 255, and causes the mixed gas passing through the mixed gas passages 255 to rotate clockwise or counterclockwise. A direction guide piece 240 is provided in each mixed gas flow path 255. This direction guidance piece 240 corresponds to the wing piece of prior art 4. In the diffuser 250, inclined direction guide pieces 240 are formed to swirl and diffuse the mixed gas of landfill gas or biogas, which is a combustible gas, and odorous gas discharged through the diffuser 250. .

In the present invention, a cylindrical combustible gas deodorization duct 210 is installed surrounding the outlet end of the combustible gas supply pipe 140.

The outlet end of the air blower 220 is connected to one side (e.g., the side side) of the combustible gas deodorization duct 210 via the air blowing pipe 230, and removes odor gas, which is combustible gas, within the combustion area. The odor gas supply pipe 200 is connected to the other side (for example, the lower side) of the combustible gas deodorization duct 210 so that odor gas supplied from the odor gas generating source can be supplied to the combustible gas deodorization duct 210. A rectifying plate 260 that quiets the flow of odorous gas just before it is supplied into the combustion area of the cylindrical incinerator 120 is installed inside the combustible gas deodorization duct 210.

A rectifying plate 260 is installed inside the combustible gas deodorizing duct 210 to rectify and blow the odorous gas, which is a combustible gas, so that the combustion flame is not deflected to one side and a stable flame is created by a constant and uniform odor gas. It is configured to maintain complete combustion.

As the rectifying plate 260, a perforated plate (or perforated plate) with a plurality of holes is usually used, but structures other than the perforated plate can be used as long as they have a rectifying effect.

In the present invention, a baffle (300) is installed on the upper inner surface of the cylindrical incinerator 120, where the mixed gas combusted exhaust gas can stay within the combustion area, thereby delaying the atmospheric release time of the exhaust gas into the furnace. Along with the effect of increasing temperature, it induces complete combustion of combustible gas. This is also necessary to maintain the temperature of 750~800℃, which is the temperature condition for combustion of odorous gas. The baffle (300) may be installed circumferentially on the upper inner surface of the cylindrical incinerator (120). The shape installed around the circumference can be inclined, and preferably, the baffle (300) is installed around the circumference at an angle of 35 degrees to the direction in which the exhaust gas is discharged, as shown in FIG. 2, so that the exhaust gas is discharged. The flow can be controlled more appropriately.

Meanwhile, in the present invention, a carbon monoxide (CO) and oxygen (O ₂ ) concentration measuring port 290 is installed on the upper outlet side of the baffle 300 of the cylindrical incinerator 120 to measure the CO and O ₂ concentrations contained in the exhaust gas using a gas analyzer. It is designed to ensure complete combustion with no CO emissions as much as possible. If there is a lot of odor gas, there is a lot of _O2 , and if there is a lack of odor gas, CO is emitted due to incomplete combustion.

Abnormally, when the supply amount of odorous gas is insufficient or the measured carbon monoxide (CO) concentration is high, the opening rate of the blocking valve 105 installed in the odorous gas supply pipe 200 is adjusted through the controller 320. You can adjust or auxiliaryly operate the air blower 220 to supply additional air into the cylindrical incinerator 120.

The location where auxiliary air is additionally supplied into the cylindrical incinerator 120 by the air blower 220 can be supplied through the air blowing pipe 230 connected to the auxiliary gas deodorization duct 210, while the auxiliary air is supplied to the cylindrical incinerator 120. Air can be supplied to the combustion area between the top of the burner 190 and the bottom of the baffle 300 through a separately connected air injection line (not shown).

As external air flows into the exhaust gas through the air passage of the natural air supply port 315, which has a space between the upper surface of the cylindrical incinerator 120 and the cylindrical chimney 130, the heated exhaust gas is cooled and discharged to the outside. An exhaust gas temperature reduction device 310 configured to reduce the temperature is installed.

The present invention, which consists of the above-described configuration, ① installs a rectifier plate 260 to rectify and blow out the odorous gas, which is a combustible gas, so that the combustion flame is not biased to one side and creates a stable flame by the odorous gas supplied consistently and uniformly. ② The supplied combustible gas, landfill gas or biogas, is discharged through the diffuser 250 mounted on the upper part of the combustible gas supply pipe 140 and is converted into combustible gas by the inclined direction guide pieces 240. It has a structure in which the mixed gas of landfill gas or biogas and odor gas burns while swirling and diffusing. ③ A baffle (300) is installed on the inner side of the top of the cylindrical incinerator (120) in the circumferential direction so that the mixed gas is combusted. It is installed to allow the exhaust gases emitted within the burned combustion area to stay, thereby delaying the release time to the atmosphere to increase the temperature inside the furnace. ④Use a small amount of inflow of landfill gas or biogas, which are combustible gases. , by supplying a large amount of odorous gas, which is a combustible gas, compared to the combustible gas, these various components exert a synergistic effect on each other, and with the complete combustion of landfill gas or biogas, odor This is to ensure efficient incineration of odorous substances in the gas.

Meanwhile, although not mentioned in this specification, all components of prior art 4 and 5 previously proposed and patented by the present applicant may be introduced into the present invention, if necessary.

<Method of incinerating odorous gas using landfill gas or biogas>

The odor gas incineration method using landfill gas or biogas according to an embodiment of the present invention is to incinerate odor gas together with landfill gas or biogas using an odor gas incineration device using landfill gas or biogas according to the present invention. In the cylindrical incinerator 120 for incineration, odorous gas is used as a combustible gas to burn landfill gas or biogas, which is a combustible gas, and the incineration temperature of odorous gas in the combustion area of the cylindrical incinerator 120 is 750°C to 800°C. ℃, and on the upper inner surface of the cylindrical incinerator 120, there is a baffle 300 that allows the exhaust gas discharged after combustion of the combustible landfill gas or biogas and the mixed gas of the odor gas to stay within the combustion area. It is installed around the circumference and at an angle to the direction in which the exhaust gas is discharged, thereby delaying the release time of the exhaust gas into the atmosphere, thereby increasing the temperature inside the furnace and inducing complete combustion of the combustible gas. .

As above, specific parts of the present invention have been described in detail, and it is clear to those skilled in the art that these specific techniques are merely preferred embodiments and do not limit the scope of the present invention. something to do. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

105: blocking valve 105a, 105b, 105c: blocking valve
100: bottom surface 110: support frame
120: Cylindrical incinerator 125: Inner peripheral wall
130: Cylindrical chimney
140: combustible gas supply pipe 145: flashback preventer
150: porous nozzle pipe 160: ignition device
170: Gas pipe for ignition 180: Electrode
190: Burner 200: Odor gas supply pipe
210: Auxiliary gas deodorization duct 220: Air blower
230: air blowing pipe 240: direction guide piece
250: Diffuser 255: Mixed gas flow path
260: rectifier plate 270: flange
280: Metal mesh 290: CO and O ₂ concentration measuring sphere
300: Baffle 310: Exhaust gas temperature reduction device
315: natural air supply port 320: controller

Claims (9)

In an incineration device that uses combustible gas from landfill gas or biogas to incinerate odorous gases generated in landfills or sewage treatment plants,
A support frame built on the floor; a cylindrical incinerator fixed to the support frame and installed vertically on the floor; a cylindrical chimney installed at the top of the cylindrical incinerator to discharge exhaust gas combusted by ignition; a combustible gas supply pipe connected to the lower part of the cylindrical incinerator to supply combustible gas of landfill gas or biogas into the combustion area; The end of the combustible gas supply pipe connected to the lower part of the cylindrical incinerator is composed of a plurality of porous nozzle pipes installed in a radial shape, and an ignition gas pipe connected to the ignitor and the combustible gas supply pipe is installed and ignited by an electrode. with burner; a combustible gas deodorization duct connected to an odorous gas supply pipe to supply odorous gas, which is a combustible gas, into the combustion area; an air blowing pipe connected to the combustible gas deodorization duct to supply auxiliary air to the air blower when there is a shortage of odor gas, which is a combustible gas, or when the concentration of carbon monoxide (CO) in the exhaust gas is high; A plurality of direction guide pieces are inclined and radially arranged and installed close to the burner so that the mixed gas of combustible gas from landfill gas or biogas and odorous gas, which is an auxiliary gas, can form and spread vortices as it spreads in the combustion area. With a diffuser; A baffle is installed on the upper inner surface of the cylindrical incinerator to allow the exhaust gas discharged after combustion of combustible landfill gas or biogas and odorous gas mixture to remain within the combustion area. It is installed around the circumference of the cylindrical incinerator to delay the atmospheric release time, thereby increasing the temperature inside the furnace and inducing complete combustion of the combustible gas. The heating temperature in the combustion area of the cylindrical incinerator is such that the odorous gas is It can be decomposed at 750℃~800℃, and the inflow of landfill gas or biogas, which is a combustible gas, and the inflow of odorous gas, which is a combustible gas, must be burned at a certain ratio. Carbon monoxide (CO) and oxygen (O) at the top of the cylindrical incinerator ₂₎ Measure the carbon monoxide (CO) concentration with a gas analyzer at the concentration measuring port, and when the CO concentration is high and there is a shortage of odorous gas, adjust the opening rate of the blocking valve installed in the odorous gas supply pipe, or use an auxiliary air blower. An odorous gas incineration device using landfill gas or biogas, which is characterized in that it is operated and treated according to the air ratio.
delete The method of claim 1, wherein a baffle is installed on the upper inner surface of the cylindrical incinerator to allow the exhaust gas discharged after combustion of the combustible landfill gas or biogas and the mixed gas of the odorous gas to remain within the combustion area. An odorous gas incineration device using landfill gas or biogas, which is installed circumferentially on the upper inner surface of a cylindrical incinerator and installed circumferentially at an angle of 35 degrees to the direction in which the exhaust gas is discharged.
The method of claim 1, wherein the inner circumferential wall of the cylindrical incinerator includes a refractory material. It is composed of refractory bricks and insulating bricks stacked on the upper and lower parts of the baffle for heat storage within the cylindrical incinerator, and the baffle is characterized by CERAKWOOL as a refractory material. A malodorous gas incineration device using landfill gas or biogas.
The method of claim 1, wherein the diffuser is a perforated plate having a plurality of mixed gas passages, and each direction guide piece allows the mixed gas passing through the mixed gas passages to rotate clockwise or counterclockwise within the combustion zone. An odorous gas incineration device using landfill gas or biogas, characterized in that it is provided in each mixed gas flow path.
According to claim 1, wherein the inside of the combustible gas deodorizing duct is provided with a rectifying plate installed to maintain the combustion flame stably without being deflected to one side by rectifying and supplying the odorous gas, which is the combustible gas. A malodorous gas incineration device using landfill gas or biogas.
The method of claim 1, wherein a metal mesh is installed between the flanges, which are connecting portions of the combustible gas supply pipe, to filter out impurities contained in the gas, and a flashback preventer is provided to prevent flashback of the gas. Odor gas incineration device using landfill gas or biogas.
The method of claim 1, wherein carbon monoxide (CO) and oxygen (O ₂ ) concentration measuring ports are installed on the upper part of the baffle, and a natural supply port is provided in a space between the upper surface of the cylindrical incinerator and the cylindrical chimney. An odorous gas incineration device using landfill gas or biogas, characterized in that a natural cooling type exhaust gas temperature reduction device is installed so that the exhaust gas heated by the inflow of external air is cooled and discharged to the outside.
Combustible gas in a cylindrical incinerator for incinerating odorous gas using landfill gas or biogas using the odorous gas incinerator using landfill gas or biogas according to any one of claims 1 and 3 to 8. Odor gas is used as a combustible gas to burn phosphorus landfill gas or biogas. The incineration temperature of odor gas in the combustion area of the cylindrical incinerator is 750℃~800℃, and the inner surface of the top of the cylindrical incinerator contains landfill gas or combustible gas. A baffle, which allows the exhaust gas discharged after combustion of the mixed gas of biogas and odorous gas to stay within the combustion area, is installed circumferentially on the inner side of the top of the cylindrical incinerator to prevent the exhaust gas from flowing out. A method of incinerating odorous gas using landfill gas or biogas, which includes installing it around the circumference at an angle to the direction of discharge to delay the release time of the exhaust gas into the atmosphere, increasing the temperature inside the furnace and inducing complete combustion of combustible gas. .