KR20170092224A - Waste refrigernat burning system - Google Patents
Waste refrigernat burning system Download PDFInfo
- Publication number
- KR20170092224A KR20170092224A KR1020160013289A KR20160013289A KR20170092224A KR 20170092224 A KR20170092224 A KR 20170092224A KR 1020160013289 A KR1020160013289 A KR 1020160013289A KR 20160013289 A KR20160013289 A KR 20160013289A KR 20170092224 A KR20170092224 A KR 20170092224A
- Authority
- KR
- South Korea
- Prior art keywords
- waste refrigerant
- combustion
- exhaust gas
- waste
- refrigerant
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/24—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/05—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste oils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
- F23J13/02—Linings; Jackets; Casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/10—Liquid waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2900/00—Special features of, or arrangements for incinerators
- F23G2900/00001—Exhaust gas recirculation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2900/00—Special features of, or arrangements for incinerators
- F23G2900/50211—Evaporating, e.g. liquid waste before burning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
- F23J2215/101—Nitrous oxide (N2O)
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
BACKGROUND OF THE
Currently, the waste refrigerant generated in the process of collecting, recovering or disposing of refrigerant equipment in Korea is representative of CFC, which is an ozone depletion material, and HFC, which is a global warming material. In Korea, there is no facility that stably disposes or destroys waste refrigerant generated from automobiles, households, industrial air conditioners, etc., and related technologies registered in Korea are mainly related to technologies for destroying waste refrigerant by using plasma to be.
The plasma decomposition method of the related art (Korean Patent No. 10-18984, apparatus and method for treating waste using plasma gas) is a technology for completely decomposing a waste refrigerant by using a high-temperature plasma.
However, such a plasma decomposition method is disadvantageous in that a dedicated facility for decomposing the refrigerant must be installed, and the processing cost is high economically. In addition, when the equipment is enlarged, it is difficult to maintain the temperature of the plasma gas, which is disadvantageous in that it is not suitable for large capacity processing.
In the case of LNG-Burning technology, which is another technology to destroy the waste refrigerant, since refractory having a relatively large heat capacity is installed to mislead the outer wall of the combustion chamber from a high temperature, there is a limit to increase the combustion efficiency. Energy is consumed.
The waste refrigerant for thermal destruction is compressed into a liquid state for transportation and is transported to the treatment facility. When the waste liquid refrigerant is supplied to the combustor, incomplete combustion occurs due to the internal temperature of the combustor due to the heat of vaporization of the waste refrigerant There is a problem.
It is another object of the present invention to provide a waste refrigerant combustion system capable of improving the combustion efficiency by reducing the heat of vaporization generated by supplying waste refrigerant to a combustor.
It is another object of the present invention to provide a waste refrigerant combustion system capable of improving combustion efficiency by supplying exhaust gas to a combustor in a state of being mixed with waste refrigerant in advance.
It is another object of the present invention to provide a waste refrigerant combustion system capable of improving combustion efficiency by allowing waste refrigerant and exhaust gas to be smoothly mixed before being supplied to a combustor.
It is another object of the present invention to provide a waste refrigerant combustion system for reducing the nitrogen oxide concentration discharged from a combustor while compensating for the heat of vaporization of waste refrigerant.
According to an aspect of the present invention, there is provided a waste refrigerant combustion system comprising: a waste refrigerant tank for supplying waste refrigerant discharged from an exhaust gas containing hydrogen fluoride through a waste refrigerant supply path during combustion; A combustion chamber provided with a supply chamber provided with a heating burner therein and a combustion chamber for burning waste refrigerant transferred from the waste refrigerant tank at an internal temperature of 900 to 1200 ° C by the heating burner; And a recirculation pipe for recovering a part of the exhaust gas discharged from the combustion furnace to the waste refrigerant supply path, wherein the waste refrigerant is vaporized by an exhaust gas having a temperature of 60 to 120 ° C. passing through the recycling pipe, And supplies it to the combustion furnace.
More preferably, the vaporizing section connected to the combustion chamber after the recycling pipe is combined with the waste-refrigerant supply passage has a distance of 3 m to 10 m.
More preferably, the recirculation rate (%) = k * (60 / recirculated exhaust gas temperature) representing the amount of exhaust gas recovered through the recirculation pipe in the exhaust gas discharged through the combustion furnace, wherein k is And has a value of 18 to 22.
More preferably, the inner circumferential surface of the vaporizing section is provided with a vortex generating projection for promoting the mixing of the waste refrigerant and the exhaust gas.
More preferably, the vortex generating protrusions project toward the center of the vaporizing section and extend along the inner circumferential surface to form a screw shape.
More preferably, the vaporization section is provided with an orifice portion whose inner diameter is reduced at an inlet side connected to the recycling pipe, and the waste refrigerant supply passage is connected to the orifice portion.
More preferably, the inner diameter of the waste refrigerant supply path is formed to be smaller than the inner diameter of the vaporizing section.
More preferably, a first check valve is mounted at a front end of a portion of the recirculation pipe connected to the waste-refrigerant supply path to prevent the waste refrigerant from flowing back to the recycling pipe.
More preferably, a second check valve is installed in the flow path connecting the recirculation pipe connection part to the chimney, to prevent air outside the chimney from flowing back to the recirculation pipe side.
More preferably, a heat exchanger for exchanging heat between the exhaust gas discharged from the combustion furnace and water to cool the combustion gas at a temperature of 80 to 180 DEG C to vaporize water to generate steam, and a heat exchanger And a cleaning tower for removing impurities including hydrogen fluoride contained in the combustion gas, wherein the cleaning tower is made of a resin material so as to be in contact with the exhaust gas so as to prevent corrosion by the impurities,
The steam is supplied to the combustion chamber,
C 2 H 2 F 4 + 4H 2 O? 4HF + 3H 2 + 2CO 2 ?????
Lt; / RTI >
More preferably, the cleaning tower is constructed such that a thermosetting resin is applied to an inner wall which is in contact with an exhaust gas, a glass fiber is adhered to a place where the thermosetting resin is applied, a thermosetting resin is further applied thereon, Thereafter, it is cured to form an F-alpha layer.
In the waste refrigerant combustion system according to the present invention, the waste refrigerant supplied in a liquid state is brought into contact with the exhaust gas in the vaporizing section and the waste refrigerant is introduced into the combustor in a vaporized state, So that the combustion efficiency of the waste refrigerant is improved.
The waste refrigerant combustion system according to the present invention mixes the waste refrigerant supplied in a liquid state through the vaporization section with the exhaust gas and mixes the waste gas with the primary gasified waste refrigerant in the
Further, since the waste refrigerant combustion system according to the present invention does not use a separate heater or heat exchanger for raising the temperature of the waste refrigerant, the manufacturing cost is reduced and corrosion or damage of the heat exchanger due to exhaust gas is prevented .
Further, the waste refrigerant combustion system according to the present invention has the effect of reducing the nitrogen oxide emission and reducing the cost by using the exhaust gas recycled to the combustor.
Further, in the waste refrigerant combustion system according to the present invention, since the combustion air discharged so as to form the swirling flow is discharged in an inclined direction toward the supply chamber, sufficient time is ensured for the combustion gas to be completely combusted in the combustion furnace, It is effective.
FIG. 1 is a state diagram showing a waste refrigerant combustion system according to a first preferred embodiment of the present invention. FIG.
FIG. 2 is a cross-sectional view of the combustor shown in FIG. 1,
3 is a cross-sectional view showing a portion "AA" shown in Fig. 2,
4 is a side view showing a vaporization section connected to a combustor,
5 is a cross-sectional view illustrating a vaporization section of a waste refrigerant combustion system according to a second preferred embodiment of the present invention.
FIG. 6 is a sectional view showing a vaporization section of a waste refrigerant combustion system according to a third preferred embodiment of the present invention, FIG.
7 is a graph showing the temperature distribution of the combustor according to the length of the vaporization section,
Figure 8 is a side view of the heat exchanger shown in Figure 1,
FIG. 9 is a cross-sectional view of the heat exchanger shown in FIG. 1; FIG.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a waste refrigerant combustion system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
Here, the shape, size, ratio, angle, number and the like shown in the accompanying drawings are schematic and may be modified somewhat. 2) Since the drawing is shown by the line of sight of the observer, the direction or position to explain the drawing can be variously changed according to the position of the observer. 3) The same reference numerals can be used for the same parts even if the drawing numbers are different. 4) If 'include', 'have', 'have', etc. are used, other parts can be added unless '~ only' is used. 5) Numerals can also be interpreted as described in the singular. 6) Even if the shape, size comparison, positional relationship, etc. are not described as 'weak or substantial', it is interpreted to include the normal error range. 7) 'after', 'before', 'after', 'after', and 'after' are not used to limit the temporal position. 8) The terms 'first, second, third', etc. are used selectively, interchangeably or repeatedly for convenience of division, and are not construed in a limiting sense. 9) If the positional relationship of the two parts is described as 'on top of', 'on top', 'on bottom', 'on side', 'on side' and so on, This can also be located. 10) When parts are electrically connected to '~ or', parts are interpreted to include not only singles but also combinations, but parts are interpreted solely if they are electrically connected to '~ or'.
FIG. 2 is a cross-sectional view of the combustor shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, And FIG. 4 is a side view showing a vaporization section connected to the combustor.
1 to 4, a waste refrigerant combustion system according to a first preferred embodiment of the present invention includes an air-cooled
The air-cooled
A
The
As shown in FIG. 4, in the
The waste
A first check valve 5c is mounted on the front end of the portion to which the waste
As shown in FIGS. 4 and 5, the
The internal temperature of the
In order to smoothly vaporize the waste refrigerant in the
'Recirculation rate (%) = k * (60 / recirculated exhaust gas temperature)', where k has a value of 18 to 22. k is preferably 20.
That is, when the temperature of the recirculated exhaust gas is 60 캜, the waste refrigerant is vaporized actively by the exhaust gas when the recirculation rate of the recirculated exhaust gas is 20%, thereby enabling complete combustion of the waste refrigerant, When the temperature of the gas is 120 ° C, even if the recirculation rate of the recirculated exhaust gas is maintained at 10%, the evaporation of the waste refrigerant is vigorous, and complete combustion is possible.
Therefore, a temperature sensor is provided in the
Since the supply amount of the waste refrigerant supplied through the waste
A vortex generating protrusion (31) protrudes inside the vaporizing section (30). The
When the
The
As shown in FIGS. 1, 8 and 9, a
The
The
The
The material of the
The water in the water tank 61 is supplied to the
The connecting portion between the
The exhaust gas whose temperature is lowered to 80 to 180 ° C through heat exchange is transferred to the cleaning
On the inner wall of the cleaning
When the temperature of the exhaust gas flowing into the cleaning
The hydrogen fluoride (HF), which is highly corrosive when burning the waste refrigerant, is generated at a concentration of about 5 vol% (about 50,000 ppm). According to the domestic Air Quality Preservation Act, the allowable air pollutant emission standard is about 3ppm. Therefore, the concentration of hydrogen fluoride in the exhaust gas must be reduced to 3 ppm through the
As described above, the exhaust gas is supplied to the cleaning
The steam generated by the heat exchanger (50) is also supplied into the combustion furnace (11) through the supply pipe (55).
The
In the combustion reaction of fluorinated hydrocarbons (composed of C, H and F) such as waste refrigerant, the final products are CO 2 and HF. However, since most fluorinated hydrocarbons have a higher molar number of fluorine (F) (CF 4 ).
Therefore, in order to completely burn out fluorinated hydrocarbons, it is necessary to supply additional hydrogen (H). In the present invention, steam generated in the heat exchanger (50) is supplied to the inside of the combustion chamber (20) to effectively remove carbon tetrafluoride.
C 2 H 2 F 4 + 4H 2 O? 4HF + 3H 2 + 2CO 2 ?????
As described above, steam (4H 2 O) is additionally supplied to the inside of the
When steam is supplied into the
In the waste refrigerant combustion system according to the second preferred embodiment of the present invention, the
The
The exhaust gas supplied through the
Also, although not shown, a shape in which the
Since the mixing of the waste refrigerant and the exhaust gas is promoted by providing the
The internal volume of the air-cooled
In the
Further, the exhaust gas at about 60 to 120 ° C is supplied to the
Further, the combustion air supplied to the combustor is supplied to the
When the internal temperature of the
Some of which are transferred to the
The exhaust gas that has been transferred to the
As described above, since the thermal destruction processing and detoxification system for waste refrigerant only according to the present invention is applied to waste or solid fuel in the case of conventional air-cooling type ointment technology, the excess air ratio is 1.8 to 2.2, It was possible to burn while supplying. At this time, the oxygen concentration in the combustion gas is about 12 vol%.
In the
Further, it is possible to ensure complete combustion through the swirling flow of the combustion air supplied into the
The internal feed rate is very important for swirl flow formation. In order to prevent the internal supply speed of the
In the present invention, since the target waste is a waste refrigerant and LNG is used as the auxiliary fuel, the excess air ratio can be operated at a relatively low value of 1.3 to 1.4. Therefore, as the supply amount of the combustion air decreases, Is further required. In the present invention, a combustion gas for forcedly blowing outside air with a fluid for cooling the outer wall of the combustion furnace (11) is used.
The air-cooled
In addition, the
A secondary combustion chamber may be additionally provided at the rear end of the air-cooled
The
In the present invention, it is economical to prevent the internal temperature of the combustion chamber from being reduced when the waste refrigerant is supplied into the combustion furnace, and to supply the heat energy required for vaporization of the refrigerant from outside the system. Further, by applying the exhaust gas recirculation method in which the exhaust gas is supplied again to the
In the present invention, it is possible to use a cleaning
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.
5a: Recirculation piping
7: Waste refrigerant tank
7a: a waste refrigerant supply path
10: Air-cooled combustor
11: Combustion furnace
12: Supply Room
30: Vaporization section
31: vortex generating projection
33: Orifice part
50: heat exchanger
51: Wall
52: Water pipe
53: First header
54: Second header
55: supply pipe
70: washing tower
Claims (11)
A supply chamber 12 in which a heating burner 16 is installed and a combustion chamber 16 for burning the waste refrigerant delivered from the waste refrigerant tank 7 in an internal temperature range of 900 to 1200 ° C by the heating burner 16 A combustion furnace (11) equipped with a combustion chamber (20);
And a recycling pipe (5a) for recovering part of the exhaust gas discharged from the combustion furnace (11) to the waste refrigerant supply path (7a)
And the waste refrigerant is supplied to the combustion furnace (11) in a state where the waste refrigerant is vaporized by an exhaust gas having a temperature of 60 to 120 占 폚 passing through the recycling line (5a).
Recirculation rate (%) = k * (60 / recirculated exhaust gas temperature)
Where k is a value between 18 and 22.
And a cleaning tower (70) for removing impurities including hydrogen fluoride contained in the combustion gas passing through the heat exchanger (50)
The cleaning tower (70) is made of a resin material so as to be in contact with the exhaust gas so as to prevent corrosion by the impurities,
The steam is supplied to the combustion chamber 20,
C 2 H 2 F 4 + 4H 2 O? 4HF + 3H 2 + 2CO 2 ?????
Of the waste refrigerant combustion system.
A thermosetting resin is applied, a glass fiber is adhered to a thermosetting resin-coated portion, a thermosetting resin is further applied on the thermosetting resin, and after bubbles are removed by pressing, the thermosetting resin is cured to form an F-
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020160013289A KR20170092224A (en) | 2016-02-03 | 2016-02-03 | Waste refrigernat burning system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020160013289A KR20170092224A (en) | 2016-02-03 | 2016-02-03 | Waste refrigernat burning system |
Publications (1)
Publication Number | Publication Date |
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KR20170092224A true KR20170092224A (en) | 2017-08-11 |
Family
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Family Applications (1)
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KR1020160013289A KR20170092224A (en) | 2016-02-03 | 2016-02-03 | Waste refrigernat burning system |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114659114A (en) * | 2022-03-22 | 2022-06-24 | 合肥工业大学 | Environment-friendly solid waste treatment device |
-
2016
- 2016-02-03 KR KR1020160013289A patent/KR20170092224A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114659114A (en) * | 2022-03-22 | 2022-06-24 | 合肥工业大学 | Environment-friendly solid waste treatment device |
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