KR101323610B1 - Burner device for increasing temperature of exhaust gas - Google Patents

Abstract

The present invention relates to an apparatus for mixing exhaust gases and flames, the body portion having an inner space formed therein, the inlet portion coupled to one side of the body portion to introduce the exhaust gas into the body portion, being inserted concentrically with the body portion in the inner space of the body portion. It is formed through the inner tube having a combustion chamber for generating the first flame, the body portion and the longitudinal direction of the inner tube, the end portion for providing an ignition source is provided between the ignition device, the body portion and the inlet portion located in the combustion chamber It is supported by the inner tube to be mounted on the body portion, the support plate for sealing one side of the inner tube, the fuel injection nozzle formed through the support plate to inject fuel into the combustion chamber corresponding to the ignition source by the ignition device, and generated in the combustion chamber And a mixing chamber in which the flame ejected into the through-holes of the inner tube and the exhaust gas passing through the body part are mixed and combusted.

Description

BURNER DEVICE FOR INCREASING TEMPERATURE OF EXHAUST GAS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner device for increasing the exhaust gas temperature, and more specifically, to exhaust the particulate matter (Particulate Matter (PM)) in the exhaust gas issued by a diesel engine, etc. so as to regenerate the soot collected in the filter. In a short time, but creates an isolated space (combustion chamber) in order to prevent the reduction or extinction due to changes in the flow rate and flow of the exhaust gas in the flame generated inside, and expand the flame generated in the combustion chamber to exhaust the exhaust gas The present invention relates to a burner device for increasing the exhaust gas temperature, to effectively transmit thermal energy.

In general, the diesel particulate filter (DPF) system is a filter for filtering soot particles and a diesel vehicle after-treatment system for oxidizing the collected soot when a certain amount of soot is collected in the filter. It requires a regeneration device, which can be divided into a passive regeneration (Passive DPF) method and a forced regeneration (Active DPF) method for the stable use of the DPF system.

The natural regeneration method described above is a method in which the temperature of the exhaust gas is increased by the oxidation catalyst added in the soot filtration filter, and the smoke is continuously oxidized using oxygen and nitrogen dioxide in the exhaust gas.

However, the natural regeneration method is difficult to expect a smooth soot filter regeneration effect because the exhaust gas temperature is far below the catalyst activation temperature required for the natural regeneration in the case of a vehicle running at a low speed in the city, As a result, the vehicle equipped with the device has problems such as deterioration of fuel efficiency, engine relief, and filter damage.

On the contrary, the forced regeneration method uses a forced heating means to raise the temperature of the exhaust gas to the oxidizable temperature of the soot when a certain amount of soot is collected in the filter, thereby continuously regenerating the soot filtration filter at an appropriate time. This is a means to maintain the performance of the DPF system and the performance of the vehicle.

The heating means used in the forced regeneration method includes a burner device, a catalytic combustion device, an electric heater, and the like. In particular, the burner device generates a flame by igniting fuel through an ignition unit, which is used as a power source in a vehicle. This system burns diesel fuel directly inside the exhaust pipe.

Thus, the method of raising the temperature of the exhaust gas by using a conventional burner device is as follows.

1 is a cross-sectional view showing a conventional exhaust gas heating method of raising the temperature of the exhaust gas by a burner device connected to the exhaust gas discharge pipe. Referring to FIG. 1, the conventional burner device 10 generates a spark. To generate the flame through the ignition unit 11 and the fuel and air inlet (not shown) connected to one side to generate the flame in the fireball unit 13. It consists of a body 12 that supplies the necessary fuel and oxygen.

In the conventional burner device 10, when fuel is introduced into the body 12 through the fuel and air inlets, the ignition unit 11 generates a spark to ignite the fuel, thereby causing the fire unit 13 to be burned. To create a flame.

In addition, the generated flame increases the temperature of the exhaust gas by heating the side surface of the exhaust gas moving through the exhaust gas transfer pipe 20.

However, the heating method of the exhaust gas by the conventional burner apparatus 10 as described above uniformly adjusts the temperature of the exhaust gas to a temperature (usually around 600) for oxidizing particulate matter (PM) contained in the exhaust gas. There is a problem of lack of fire power to raise.

When a high output is generated in a diesel engine due to a hill climbing or a sudden start, the flame ignited inside the burner device 10 is extinguished by the high pressure exhaust gas discharged momentarily through the exhaust gas discharge pipe. There is a problem that becomes.

The present invention was created to solve the above-described problems, and generates a flame of high thermal power that is not extinguished by the high-pressure exhaust gas, and is provided so that the exhaust gas flows in and flows around the flame. It is an object of the present invention to provide a burner device for increasing the exhaust gas temperature, in which the temperature of the exhaust gas is rapidly increased by mixing the gas and the flame.

In order to achieve the above object, the exhaust gas and flame mixing apparatus according to the present invention is a body portion having an internal space, the inlet portion coupled to one side of the body portion to introduce the exhaust gas into the body portion, the inside of the body portion Is inserted into the space concentric with the body portion, the inner tube is provided with a combustion chamber for generating the first flame, the body portion and is formed perpendicularly to the longitudinal direction of the inner tube, the end portion providing an ignition source is An ignition device positioned in a combustion chamber, provided between the body portion and the inlet portion, supporting the inner tube to be concentric with the body portion, a support plate for sealing one side of the inner tube, spark by the ignition apparatus A fuel injection nozzle formed through a central portion of the support plate to inject fuel into the combustion chamber simultaneously with the occurrence of And a combustion chamber in which the flame generated in the chamber and ejected into the through-holes of the inner tube and the exhaust gas passing through the body part are mixed and combusted. It is characterized by being formed.

In addition, it characterized in that it further comprises a tube formed so that one end is located in the combustion chamber the other end through the support plate to the side of the fuel injection nozzle.

In addition, the distal end portion of the tube located in the combustion chamber is characterized in that bent in the direction of the inner peripheral surface of the inner tube at a predetermined angle by a predetermined length.

In addition, the mixing chamber has an internal space structure for increasing the flow rate of the introduced exhaust gas.

In addition, an additional air flow generating piece is provided inside the mixing chamber.

As the burner device for increasing the exhaust gas temperature according to the present invention has a separate combustion chamber, there is an effect of preventing the flame from being reduced and extinguished by the exhaust gas introduced at a high pressure.

In addition, the burner device for increasing the exhaust gas temperature according to the present invention has an effect of changing the flow of the exhaust gas to be introduced, thereby increasing the mixing efficiency between the exhaust gas and the flame generated in the combustion chamber.

1 is a cross-sectional view showing a conventional exhaust gas heating method,
2 is a cross-sectional view of an apparatus for mixing exhaust gas and flame according to the present invention;
3 is a combined perspective view of some components of the exhaust and flame mixing device according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in this specification and claims should not be construed as limiting their ordinary or dictionary meanings, and the inventors will appropriately introduce the concept of terms in order to best describe their invention. Based on the principle that the definition can be made in a simple manner, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

2 is a cross-sectional view of the burner device for increasing the exhaust gas temperature according to the present invention, and FIG. 3 is a perspective view of a combination between some components of the mixing device of the exhaust gas and the flame according to the present invention.

Exhaust gas and flame mixing apparatus 100 according to the present invention is the body portion 110, the support plate 120 inlet 130, the inner tube 140, the ignition device (2) 150, a fuel injection nozzle 160, a pipe 170, and a mixing chamber 180.

 First, the body portion 110 is provided with an inner space, both sides end is a cylindrical member, it is possible to be provided in the form of a square or polygon, without being limited to the cylindrical.

The support plate 120 has the same shape as the cross section of the cylindrical body portion 110, the open end and one side of the body portion 110 is connected to each other, the other side is the inlet 130 through which the exhaust gas is introduced Connected with.

At this time, the coupling with the body 110 and the inlet 130 is made through the coupling of the screw penetrating the holes formed at equal intervals in the support plate 120.

The inlet 130 is a cylindrical pipe member and one end portion of the body portion 110 is connected to exhaust gas discharged from engines such as various vehicles or ships. It functions as a passage to enter into the inner space 111 of.

Here, a flange 131 may be formed at the other end of the inlet 130 so as to be fixedly connected to an exhaust gas transfer pipe (not shown) which is a movement passage of the exhaust gas discharged from the engine.

On the other hand, the inner tube 140 is inserted into the inner space 111 of the body portion 110, and includes a combustion chamber 141 for generating the first flame by the ignition device as a space inside the inner tube. .

The inner tube 140 has a plurality of through-holes 144 formed at one end thereof, and the other end thereof is connected to one side of the support plate 120 to be sealed by the support plate 120.

The above-described through hole 144 minimizes non-combustion of exhaust gas by allowing the flame generated in the combustion chamber 141 to be evenly dispersed without being concentrated in a specific portion.

Meanwhile, the plurality of airflow generation pieces 142 positioned between the outer circumferential surface of the inner tube 140 and the inner circumferential surface of the support plate 120 may have a predetermined angle not perpendicular to the support plate 120 to form the inflow portion 130. By allowing the exhaust gas flowing through the to form a rotary air flow to increase the mixing efficiency with the flame ejected from the combustion chamber 141 through the through-hole 144.

More specifically, as the airflow generation pieces 142 are formed at equal intervals, an exhaust gas through hole 143 through which the exhaust gas passes is formed between the airflow generation pieces 142. As illustrated in FIG. 1, the exhaust gas passing through the hole 143 is in contact with the airflow generation piece 142 and is converted into a rotary airflow.

The ignition device 150 is formed through the body portion 110 and the inner tube 140, the distal end where the ignition source is located is located in the combustion chamber 141.

The fuel injection nozzle 160 is formed such that an end portion at which the fuel is injected is positioned in the combustion chamber 141, thereby providing an ignition source at the end portion of the ignition device and injecting fuel to generate a flame.

On the other hand, the pipe 170 formed through the support plate 120 on both sides of the fuel injection nozzle 160 is formed so that one end is located in the inlet 130 and the other end in the combustion chamber 141.

The tube 170 has particles and oxygen required to generate a flame by the ignition device 150 and the fuel injection nozzle 160 flow into the combustion chamber 141. The particles and oxygen further increase the efficiency of the flame. Increase

Here, the distal end portion of the tube 170 located in the combustion chamber 141 is bent in the direction of the inner circumferential surface of the inner tube 140 at a predetermined angle by a predetermined length, which is caused by the pressure of the inflow air. This is to prevent the generation of the flame generated by the 150 and the fuel injection nozzle 160.
In addition, as shown in Figure 2, one end of the tube 170 formed in the inlet 130, it is preferable to have a trumpet structure is opened to a predetermined size to facilitate the inflow of particles and oxygen.

The mixing chamber 180 coupled to the other side of the body portion 110 to which the inlet 130 is coupled has a predetermined space and is generated in the combustion chamber 141 so that the through hole 144 of the inner tube 140 is formed. Mixing of the exhaust gas flowing through the inner space 111 between the flame is ejected through the inner and outer peripheral surface of the inner tube 140 and the inner peripheral surface of the body portion 110.

As shown in FIG. 1, the above-described mixing chamber 180 has a narrow cross section of a space and has a predetermined width, and has a narrow cross section.

The structure of the mixing chamber 180 forms the structure as described above in order to increase the flow rate of the exhaust gas so that the mixing of the flame and the exhaust gas is more actively performed.

On the other hand, an additional air flow generation piece 181 is formed at the end of the mixing chamber 180, the additional air flow generation piece 181 performs the same function as the air flow generation piece 142 described above, By improving the rotational force of the flame and the exhaust gas is made more active mixing.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various modifications and changes may be made without departing from the scope of the appended claims.

100: mixture of exhaust gas and flame
110: body portion 111: internal space
120: support plate 130: inlet
131: flange 140: inner tube
141: combustion chamber 142: air flow generation
143: exhaust gas through hole 144: through hole
150: ignition device 160: fuel injection nozzle
170: tube 180: mixing chamber
181: additional air flow generation

Claims (8)

A body part 110 in which an inner space 111 is formed;
An inner tube (140) inserted into the inner space (111) of the body portion (110) and having a combustion chamber (141) for generating a flame;
An ignition device (150) mounted through the body portion (110) and the inner tube (140);
A fuel injection nozzle 160 mounted to inject fuel into the combustion chamber 141 corresponding to the ignition device 150; And
Combustion gas generated in the combustion chamber 141 and ejected into the plurality of through holes 144 passing through the inner and outer circumferential surfaces of the inner tube 140 and the exhaust gas passing through the body part 110 are mixed to perform combustion. Mixing chamber 180 formed at the rear end (後端) of the body portion 110; including,
It is formed on the outside of the fuel injection nozzle 160, the pipe 170 for injecting the exhaust gas flowing into the inlet 130 formed at the front end of the body portion 110;
The distal end portion of the tube 170 located in the combustion chamber 141 is bent at a predetermined angle by an intermediate portion of the tube 170 corresponding to a predetermined length, so that the inner circumferential surface of the inner tube 140 and the fuel injection Burner device for exhaust gas heating, characterized in that formed between the nozzle (160). The method of claim 1,
Burner device for increasing the exhaust gas, characterized in that a plurality of air flow generating piece (142) is formed on the outer peripheral surface of the inner tube (140). delete delete The method of claim 1,
Burner device for increasing the exhaust temperature, characterized in that the inlet of the tube 170 is opened to a predetermined size having a bugle structure. The method of claim 1,
The mixing chamber 180 has a burner device for increasing the exhaust gas, characterized in that the cross-sectional area is narrowed toward the rear end. 7. The method according to claim 1 or 6,
Burner device for increasing the exhaust gas, characterized in that the additional air flow generating piece (181) is provided inside the mixing chamber (180). The method of claim 1,
The ignition device 150 is an exhaust gas heating burner device, characterized in that the spark generator or electric heater.

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