KR20170111888A - Oxidation Apparatus For Reducing Heat Loss By Combustion Gas - Google Patents

Oxidation Apparatus For Reducing Heat Loss By Combustion Gas Download PDF

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Publication number
KR20170111888A
KR20170111888A KR1020160038138A KR20160038138A KR20170111888A KR 20170111888 A KR20170111888 A KR 20170111888A KR 1020160038138 A KR1020160038138 A KR 1020160038138A KR 20160038138 A KR20160038138 A KR 20160038138A KR 20170111888 A KR20170111888 A KR 20170111888A
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KR
South Korea
Prior art keywords
combustion
gas
purge
combustion chamber
air
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Application number
KR1020160038138A
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Korean (ko)
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KR101845889B1 (en
Inventor
이현재
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주식회사 엔바이온
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Priority to KR1020160038138A priority Critical patent/KR101845889B1/en
Priority to CN201780016372.5A priority patent/CN108779914A/en
Priority to PCT/KR2017/003457 priority patent/WO2017171417A1/en
Publication of KR20170111888A publication Critical patent/KR20170111888A/en
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Publication of KR101845889B1 publication Critical patent/KR101845889B1/en

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    • 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
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • 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
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
    • F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means
    • 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
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/60—Combustion in a catalytic combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/14—Gaseous waste or fumes

Abstract

A combustion system for reducing heat loss of a combustion gas is disclosed. The present invention relates to a combustion device including a burner for burning a process waste gas, an inflow gas duct for introducing the process waste gas into the combustion chamber, and an exhaust gas duct for discharging the process waste gas oxidized in the combustion chamber Characterized in that the fuel and the combustion air are introduced into the burner and a mixed gas of a branch gas branched from the combustion chamber and branch gas branched from the exhaust gas duct is supplied to the combustion chamber Lt; / RTI > According to the present invention, it becomes possible to provide a combustion device that minimizes heat loss of combustion air.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a combustion apparatus for minimizing heat loss due to combustion air,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus for a waste gas of a process discharged from an industrial site, and more particularly to a combustion apparatus for reducing heat loss of a combustion gas.

Combustion facilities that oxidize harmful gases including volatile organic compounds generated in the industrial process gas to the atmosphere and discharge them to the air include regenerative combustion equipment, thermal storage catalytic combustion equipment, catalytic combustion equipment, thermal oxidation equipment Various combustion facilities are being used.

Among these combustion facilities, various attempts have been made to reduce the heat loss due to the combustion air and to mitigate the impact on the heat storage material in the regenerative combustion system. Korean Patent No. 10-0803764 uses a method of supplying auxiliary fuel to the front and rear of the fan. This facility is characterized by the inflow of supplemental fuel along with the incoming gas to the inflowing gas duct. That is, the auxiliary fuel is configured to be mixed with the inflow gas to be introduced therein, thereby increasing the concentration of the gas flowing into the combustion facility. The higher the concentration is burned in the combustion chamber, the combustion heat is generated, and the load of the burner injected into the combustion chamber is reduced.

However, this method requires the introduction of the auxiliary fuel into the inflow gas duct, so there is a safety problem in the operation of the system, and there is a possibility that the auxiliary fuel burns before entering the combustion chamber, and the heat exchange layer performs its function It may not be possible.

In addition, Korean Patent No. 10-1210512 uses a method of installing a diffuser at the lower part of a heat storage device, and Korean Patent No. 10-0836764 uses a method of using an inflow gas as combustion air .

Such conventional combustion facilities mainly supply heat sources using burners using fuel such as light oil, LPG, and NG. The mass of oxygen actually supplied varies depending on the ambient temperature at the time of supplying the combustion air to the blowing fan in such a combustion facility. For example, the oxygen of the 4 CH 2 moles per mole is required for the case of fuel combustion comprising mainly CH 4.

(Formula 1)

CH 4 + 2O 2 ? CO 2 + 2H 2 O

Therefore, in order to accurately supply the combustion air supplied to the burner of the combustion facility, it is necessary to be able to accurately control the flow rate according to the ambient temperature, but such a blower requires an excessive investment cost.

KR 10-0803764 B KR 10-1210512 B KR 10-0836764 B

SUMMARY OF THE INVENTION [0006] In order to solve the problems of the prior art, it is an object of the present invention to provide a combustion device that minimizes heat loss of combustion air.

Another object of the present invention is to provide a combustion device that minimizes the influence of the temperature of the combustion air flowing into the supplied burner.

According to an aspect of the present invention, there is provided an exhaust gas purifying apparatus for an internal combustion engine including a combustion chamber including a burner for oxidizing a process waste gas, an inflow gas duct for introducing the process waste gas into the combustion chamber, A combustion apparatus including an exhaust gas duct, wherein fuel and combustion air are introduced into the burner, and a mixed gas of a branch gas branched from the combustion chamber and branch gas branched from the exhaust gas duct is introduced into the burner And the supply of the combustion gas is stopped.

In the present invention, the combustion facility may further include a heat exchange layer between the inflow gas duct and the exhaust gas duct and the combustion chamber. At this time, the heat exchange layer may be divided into a plurality of regions including an inflow region, an exhaust region, and a purge region, and may further include a distribution mechanism for distributing the process waste gas to the regions. In addition, the combustion facility may further include purge means for purging the purge region.

At this time, the purge unit may purge the purge region by introducing air into the combustion chamber or extracting the process waste gas from the combustion chamber. In the latter case, the extracted process waste gas may join into the inflow gas duct.

According to another aspect of the present invention, there is provided an exhaust gas purification apparatus including a combustion chamber including a burner for oxidizing a process waste gas, an inflow gas duct for introducing the process waste gas into the combustion chamber, And a purging means for purging the heat exchange layer, wherein the fuel and the combustion air are introduced into the burner, and the combustion gas is introduced into the burner, The purge means extracts a purge gas from the combustion chamber to purge the heat exchange layer, and a mixed gas of the branch gas branched from the combustion chamber and the purge gas is supplied by the combustion air.

In the present invention, a part of the purge gas may join to the inflow gas duct.

According to the present invention, it becomes possible to provide a combustion device that minimizes heat loss of combustion air. Further, according to the present invention, it becomes possible to provide a combustion facility in which the flow rate control of the combustion air is not required in accordance with the change of the outside air temperature.

Fig. 1 is a view schematically showing a gas flow flowing in and out of a combustion facility.
2 is a view schematically showing a cross-sectional structure of a heat exchange layer used in the combustion equipment of the present invention.
FIG. 3 is a view for explaining mass balance with respect to a gas flow flowing into and out of the combustion facility shown in FIG. 1. FIG.
4 is a schematic view of a combustion device according to an embodiment of the present invention.
5 is a view illustrating an exemplary combustion facility according to another embodiment of the present invention.
6 is a view showing an example of a combustion facility according to another embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the drawings.

Fig. 1 is a view schematically showing a gas flow flowing in and out of a combustion facility.

In the present invention, the combustion device 100 may include a regenerative combustion device, a regenerative catalytic combustion device, a catalytic combustion device, and a thermal oxidation device. Preferably, as shown in FIG. 1, the combustion apparatus 100 may be a regenerative type combustion apparatus or a regenerative catalytic type combustion apparatus.

1, the combustion facility includes a heat exchange layer 112, a combustion chamber 114, a burner 116, a gas distribution mechanism 120, an inlet gas duct 122 and an outlet gas duct 124 .

1, the process waste gas (1) flowing into the inflow gas duct 122 is preheated to the combustion temperature while passing through the heat exchange layer 112 via the distributing mechanism 120, and the odor The material, volatile organic compound material (VOC), etc., start to oxidize and burn in the combustion chamber 114 for a suitable residence time. The combusted waste gas (4) passes through the heat exchange layer (112), accumulates the heat exchange layer, and is discharged to the atmosphere through the exhaust gas duct (124).

At this time, a burner 116 is used to keep the temperature of the combustion chamber 114 at the oxidation temperature of the waste gas. At this time, the burner 116 is supplied with the outside air A together with the vapor F . The supplied fuel and the outside air join the waste gas stream (④) which is burned and discharged.

Further, purge gas (3) is supplied to the combustion facility (100). The supplied purge gas passes through the heat exchanging layer 112 via the distributing mechanism 120 and joins the waste gas stream (4) discharged. To this end, a purge means such as a blower may be added to the combustion equipment.

2 is a view schematically showing a cross-sectional structure of a heat exchange layer used in the combustion equipment of the present invention.

2 (a) and 2 (b), the heat exchange layer 112 is divided into various regions separated by a separation plate 113 or the like. At the lower end or proper position of the heat exchange layer, waste gas is introduced into predetermined separated inlet regions I 1 , I 2 of the heat exchange zone and other predetermined separated outlet regions O 1 , O 2 , O 3 For example, a rotary type rotor, for example. Of course, some of the discharge areas, such as the discharge area O 1 , may also be used as dead zones. The rotary type rotor may include a channel (not shown) for rotating the shaft about which the waste gas flows into and out of the heat exchange layer 112. The separation plate 113 not only separates the heat exchange layer but also extends to the rotation type rotor to allow the process gas introduced from the rotation type rotor to flow into the inlet region of the heat exchange layer, To be discharged to the discharge port 224 through the rotating rotor.

In addition, the heat exchange layer may have a separate purge region (P). In the present invention, the fuzzing mechanism can be implemented in two ways. First, the gas flow in the purge region may be implemented as a bottom-up type (a) in which purge gas such as outside air flows into the combustion chamber through the heat exchange layer. At this time, the purge gas flow P has the same direction as the incoming waste gas flow I 1 , I 2 . Alternatively, it may be implemented as a top-down type (b) in which the gas is extracted downward from the combustion chamber through the heat exchange layer. At this time, the purge gas (P) flow has the same direction as the off-gas (O 1 , O 2 , O 3 ) flow.

FIG. 3 is a view for explaining mass balance with respect to a gas flow flowing into and out of the combustion facility shown in FIG. 1. FIG.

The waste gas total mass and temperature that flows into the combustion plant in Fig 3, each m i, T i, the amount and temperature of the fuel (F) flowing into the total weight and a temperature of purge air to the respective m p, T p, burners m If f, T f, the total amount and the temperature of the combustion air flowing to the burner, each m c, T c, is combusted m the total amount and the temperature of the exhaust gas discharged each o, T o la, the mass change of the inlet and outlet The mass balance can be expressed by the following equation (1). &Quot; (1) "

(1)

m o = m i + m f + m p + m c

At this time, since Cc≈Co is approximated at a low temperature, the heat loss due to the combustion air can be expressed by the following equation.

(2)

Heat loss = m c * C o * (T o -T c )

In the above equation (1), when T o -T c > 0, heat loss due to combustion air exists.

On the other hand, in addition to the heat loss, when the combustion air flows, the temperature of the combustion air, that is, T c changes due to changes in the ambient temperature. In this case, the flow rate of the combustion air must be controllable in order to maintain the mass balance according to Equation 1. In order to control the flow rate of the combustion air proportional to the fuel amount according to the temperature of the combustion air, However, there is no effective means for such flow control, and therefore, the above-described combustion apparatus has a problem that incomplete combustion or heat loss is inevitable.

4 is a schematic view of a combustion device according to an embodiment of the present invention.

Referring to FIG. 4, the combustion apparatus of the present invention includes a heat exchange layer 112, a combustion chamber 114, a burner 116, a gas distribution mechanism 120, A duct 122 and an exhaust gas duct 124.

4, the gas (④) branched from the waste gas discharged from the combustion facility (⑦) for combustion and the branched gas (⑥) from the combustion chamber are used in the present embodiment. It is possible to maintain the temperature of the combustion air constantly to improve the combustion efficiency and to increase the temperature of the combustion air and to reduce the fuel amount to maintain the temperature of the combustion chamber.

Of course, in the present invention, the flow of the optional air (emergency air) does not flow into the combustion air. However, the combustion system of this embodiment can selectively allow an optional air flow into the combustion air at the time of an emergency such as overheating, and the same applies to the following embodiments.

The total mass and temperature of the waste gas flowing into the combustion facility are m i , T i , the total mass and temperature of the purge air are m p and T p , respectively, and the total amount and temperature of the fuel (F) If f, T f, the total amount and the temperature of the combustion air flowing to the burner, each m c, T c, is combusted m the total amount and the temperature of the exhaust gas discharged each o, T o la, the mass change of the inlet and outlet The mass balance can be expressed by the following equation (1). &Quot; (1) "

(3)

m o = m i + m f + m p

As shown in the above formula, the mass (m c ) of the combustion air flowing out from the system point of view in the absence of external air is zero. Therefore, in this embodiment, heat loss due to combustion air does not occur. Further, since the combustion air for combustion is not used in the combustion system of this embodiment, it is not necessary to control the flow rate of the combustion air in accordance with the temperature change of the outside.

5 is a view illustrating an exemplary combustion facility according to another embodiment of the present invention.

As shown in FIG. 5, in the combustion facility of FIG. 5, the gas (4) branched from the waste gas discharged from the combustion facility (7) for combustion and the branched gas (6) This is the same as the embodiment.

However, the combustion equipment of FIG. 5 extracts purge air from the combustion equipment. For example, a purge mechanism as shown in FIG. 2 (b) may be used for extraction of purge air.

The purge air (8) extracted in this embodiment joins with the waste gas flowing into the combustion equipment and flows into the combustion equipment. In this case, the mass balance can be expressed by the following equation.

(4)

m o = m i + m f

In this embodiment, there is no heat loss due to combustion air. In addition, since the combustion outside air is not used in the combustion apparatus of this embodiment, it is not necessary to control the flow rate of the combustion air according to the change in the temperature of the outside.

6 is a view showing an example of a combustion facility according to another embodiment of the present invention.

Referring to FIG. 6, a purge gas (8) flow joins the incoming waste gas flow as in FIG. However, in the present embodiment, the gas (9) branched from the purge gas joins the flow of the combustion air (7).

In this embodiment, the mass balance can be expressed by the following equation.

(5)

m o = m i + m f

In this embodiment, there is no heat loss due to combustion air. In addition, since the combustion outside air is not used in the combustion apparatus of this embodiment, it is not necessary to control the flow rate of the combustion air according to the change in the temperature of the outside.

While the preferred embodiments of the present invention have been described above, the present invention is not limited thereto.

100 Combustion Facility
112 heat exchange layer
114 combustion chamber
116 burner
120 Dispensing mechanism
122 Inlet gas duct
124 Exhaust gas duct

Claims (9)

1. A combustion apparatus comprising a combustion chamber including a burner for oxidizing a process waste gas, an inlet gas duct for introducing the process waste gas into the combustion chamber, and an exhaust gas duct for discharging the process waste gas oxidized in the combustion chamber,
Fuel and combustion air are introduced into the burner,
And a mixed gas of a branch gas branched from the combustion chamber and branch gas branched from the discharge gas duct is supplied by the combustion air. The method according to claim 1,
The combustion apparatus includes:
Further comprising a heat exchanging layer between the inlet gas duct and the outlet gas duct and the combustion chamber. 3. The method of claim 2,
The heat exchange layer is divided into a plurality of regions including an inlet region, an outlet region, and a purge region,
Further comprising a dispensing mechanism for dispensing process waste gas to said areas. The method of claim 3,
Further comprising purging means for purging the purge region. 5. The method of claim 4,
Wherein the purge means purges the purge region by introducing air into the combustion chamber. 5. The method of claim 4,
Wherein the purge means extracts the process waste gas from the combustion chamber to purge the purge region. The method according to claim 6,
And the extracted process waste gas joins the inflow gas duct. An exhaust gas duct for exhausting the process waste gas oxidized in the combustion chamber, an exhaust gas duct for exhausting the process waste gas from the combustion chamber, And a purging means for purging the heat exchange layer,
Fuel and combustion air are introduced into the burner,
The purge means extracts purge gas from the combustion chamber to purge the heat exchange layer,
And a mixed gas of the branch gas branched from the combustion chamber and the purge gas is supplied by the combustion air. 9. The method of claim 8,
And a portion of the purge gas joins the inlet gas duct.
KR1020160038138A 2016-03-30 2016-03-30 Oxidation Apparatus For Reducing Heat Loss By Combustion Gas KR101845889B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020160038138A KR101845889B1 (en) 2016-03-30 2016-03-30 Oxidation Apparatus For Reducing Heat Loss By Combustion Gas
CN201780016372.5A CN108779914A (en) 2016-03-30 2017-03-30 Make the combustion apparatus of further minimum heat losses caused by combustion air
PCT/KR2017/003457 WO2017171417A1 (en) 2016-03-30 2017-03-30 Combustion equipment for minimizing heat loss by combustion air

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160038138A KR101845889B1 (en) 2016-03-30 2016-03-30 Oxidation Apparatus For Reducing Heat Loss By Combustion Gas

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KR20170111888A true KR20170111888A (en) 2017-10-12
KR101845889B1 KR101845889B1 (en) 2018-04-06

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WO (1) WO2017171417A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3679187B2 (en) * 1996-03-29 2005-08-03 株式会社キャタラー Thermal storage exhaust gas purification system
KR200397586Y1 (en) * 2005-07-19 2005-10-05 (주)한국환경기술 An incineration device of waste, in that waste gas from incinerator is recycled, mixed with oxygen and applied for burning
KR100803764B1 (en) * 2006-11-24 2008-02-15 대양환경(주) Flameless regenerative thermal oxidizer
KR101029867B1 (en) * 2010-09-08 2011-04-15 금호환경 주식회사 Multiple complex combustion system
KR101324203B1 (en) * 2011-05-03 2013-11-06 주식회사 엔바이온 Highly Effective Regenerative Thermal Oxidizer with Flow Balance
KR101324204B1 (en) * 2011-05-03 2013-11-06 주식회사 엔바이온 Highly Effective Regenerative Catalyst Oxidizer Including Auxiliary Catalyst

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CN108779914A (en) 2018-11-09
KR101845889B1 (en) 2018-04-06
WO2017171417A1 (en) 2017-10-05

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