KR200331673Y1 - Regenerative thermal oxidizer with buffer tank - Google Patents

Abstract

The present invention relates to a regenerative combustion device (RTO) for burning various harmful gases including volatile organic compounds (VOC), and the purge valve (P1) and the second of the first ceramic heat storage material provided on both sides of the regenerative combustion device, respectively. A buffer tank is provided on one side of the return pipe which is selectively communicated with one of the purge valves P2 of the ceramic heat storage material at a predetermined time interval and intermittently communicates with the blowing fan. Accordingly, the present invention provides a predetermined amount of untreated harmful gas that is introduced into the combustion chamber through the blower fan from the purge valve P1 on the first ceramic heat storage material side or the purge valve P2 on the second ceramic heat storage material side during the switching operation. Temporarily stored in the buffer tank and supplied to the combustion chamber through the blower fan and the corresponding ceramic heat storage material in the normal operation to be completely purified.

Description

Regenerative combustion apparatus equipped with a buffer tank {REGENERATIVE THERMAL OXIDIZER WITH BUFFER TANK}

The present invention relates to a regenerative combustion device (RTO) for burning various harmful gases including volatile organic compounds (VOC), and in particular, untreated harmful gases remaining in the ceramic heat storage material of the regenerative combustion device during the conversion operation are temporarily stored in the buffer tank. The present invention relates to a heat storage combustion apparatus having a buffer tank which is stored in the air and gradually supplied to the combustion chamber through the blowing fan and the corresponding ceramic heat storage material during normal operation.

In general, regenerative combustion devices are ceramic heat storage materials for waste heat generated when burning VOCs, specific air-hazards, general air-hazards, and corrosive gases in the atmosphere generated from chemical processes such as printing, painting, coating, and waste incineration. Regenerated through the heat, and the heated heat up the VOC gas, etc. by means of the re-combustion process in the combustion chamber and means to discharge to the atmosphere.

The regenerative combustion device using this technology can recover the non-combustible gas by high temperature combustion by supplying it to the required process without discharging a considerable amount of combustion heat generated when removing organic solvents or organic odorous substances to the outside. To prevent air pollution.

For example, the conventional air-toxic substance combustion facility using the heat storage combustion method includes a first and second ceramic heat storage material (1, 2) having a large surface area as shown in FIG. A combustion chamber (3) communicating with the first and second ceramic heat accumulators for purifying harmful gases through high temperature combustion; From the first ceramic heat storage material (1) in the normal operation to the combustion chamber (3) and the second ceramic heat storage material (2) in turn, and after the switching operation for a predetermined time from the second ceramic heat storage material (2) in the next normal operation A blowing fan 4 for supplying harmful gas to the combustion chamber 3 and the first ceramic heat storage material 1; Intermittent valves S1, S2, E1, and E2 connected to the first and second ceramic heat storage materials 1 and 2, the combustion chamber 3, and the blower fan 4 to regulate the flow of noxious or purified gas. P1, P2, P3).

Here, the first and second ceramic heat storage material (1, 2) is one of which is deprived of heat by the low temperature harmful gas incompletely burned in the incinerator, the other is fixed by the gas purified through the combustion chamber (3) It is intended to undergo an iterative process of preheating to temperature.

Accordingly, if the supply valve S1 and the discharge valve E2 are opened for a predetermined time while the supply valve S2 and the discharge valve E1 are closed, the blower fan 4 flows into the heat storage combustion furnace. The harmful gas containing the organic solvent is heated to a predetermined temperature (around 700 ° C.) while passing through the preheated first ceramic heat storage material 1, and introduced into the combustion chamber 3. After the high-temperature combustion (approximately 800 ~ 850 ℃) by the self-heating of combustion (if the organic solvent is insufficient, the auxiliary burner is operated) is purified and passed through the second ceramic heat storage material (2) to be discharged to the atmosphere with the heat deprived (See FIG. 2).

In this combustion process, if the temperature of the purge gas discharged from the heat storage combustion apparatus to the atmosphere rises above a predetermined value, the switching operation is periodically performed. In this switching operation, the supply valve S1 and then the discharge valve E2 are followed. Are sequentially closed, in which case the purge valve (P3) when the supply valve (S1) is closed, followed by the purge valve (P1) when the discharge valve (E2) is closed, thereby opening the first ceramic heat storage material (1). Untreated harmful gas remaining in the c) may be introduced into the combustion chamber 3 by the blowing fan 4 and combusted.

At this time, when the purge valve (P3) is closed after a certain time, the supply valve (S2) is opened so that some of the untreated harmful gas remaining in the first ceramic heat storage material (1) to the second ceramic heat storage material (2). Through the combustion chamber (3) it is possible to be burned.

Then, when all of the unprocessed noxious gas introduced into the combustion chamber 3 is completely burned and the purge valve P1 is closed, the discharge valve E1 communicating with the previously opened supply valve S2 is further opened to normal again. Operation is performed, and during such a normal operation, the harmful gas is introduced into the combustion chamber 3 through the second ceramic heat storage material 2 by the blowing fan 4 and combusted for a predetermined time.

Then, when it is detected that the temperature of the purge gas discharged from the heat storage combustion apparatus to the atmosphere during the combustion process rises above a certain value, the switching operation is performed again, and at the same time as the closing of the supply valve S2 during the switching operation. The purge valve P3 and then the purge valve P2 are opened simultaneously with the closing of the discharge valve E1 so that untreated harmful gas remaining in the second ceramic heat storage material 2 is discharged by the blower fan 4. It is introduced into the combustion chamber 3 and can be combusted.

At this time, when the purge valve (P3) is closed after a certain time, the supply valve (S1) is opened, and then when the purge valve (P2) is closed, the discharge valve (E2) is opened and the normal operation process as described above again Will be repeated.

However, conventionally, the untreated harmful gas in the first or second ceramic heat storage material does not flow into the combustion chamber within a predetermined time (about 1 second) during the switching operation and is pushed out by the gas introduced from the ceramic heat storage material on the other side. Some may be discharged to the atmosphere without being purified, accordingly there was a problem that the blower fan also needs a large capacity.

Accordingly, the present invention has been made to solve the above-described problems, the purpose of the blower fan from the purge valve (P1) of the first ceramic heat storage material side or the purge valve (P2) of the second ceramic heat storage material side in the switching operation By temporarily storing the untreated harmful gas that is introduced into the combustion chamber through one place, it is supplied to the combustion chamber through the blower fan and the corresponding ceramic heat storage material in the normal operation so that it can be completely purified.

1 is a block diagram of a heat storage combustion apparatus according to the prior art.

FIG. 2 is a timetable showing a procedure of opening and closing a valve while repeatedly repeating the heat storage combustion apparatus of FIG. 1 in a normal operation and a switching operation mode. FIG.

3 is a block diagram of a heat storage combustion apparatus having a buffer tank according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: first ceramic heat storage material 2: second ceramic heat storage material

3: combustion chamber 4: blowing fan

5: Return pipe 6: Buffer tank

7: bypass valve 8: feed pipe

9: Control valve S1, S2: Supply valve

P1, P2, P3: Purge Valve E1, E2: Discharge Valve

In order to achieve the above object, the present invention flows harmful gas generated during a predetermined combustion process into one of the first and second ceramic heat storage materials through a blowing fan to raise the temperature to a predetermined temperature, and then burns it in a combustion chamber to purify it. In the heat storage combustion apparatus for purifying the harmful gas by alternately repeating a series of processes of cooling to a predetermined temperature through the other ceramic heat storage material and then discharged to the atmosphere, purge valve (P1) of the first ceramic heat storage material And a side of the return pipe which is selectively communicated with one of the purge valves P2 of the second ceramic heat storage material at a predetermined time interval and intermittently communicates with the blowing fan, and is returned from the purge valve of the ceramic heat storage material to the blowing fan during the switching operation. Temporarily store untreated harmful gas and supply it to the combustion chamber through the blower fan and the corresponding ceramic heat storage material during normal operation. It characterized in that the buffer tank can be designed to handle.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 3.

3 is a block diagram of a heat storage combustion apparatus having a buffer tank according to the present invention.

As shown in FIG. 3, the harmful gas generated in a predetermined combustion process is introduced into one of the first and second ceramic heat storage materials 1 and 2 through a blowing fan 4 to be heated to a predetermined temperature. After the combustion process in the combustion chamber (3) to purify, and then to a certain temperature through the remaining one of the ceramic heat accumulator (1 or 2) by repeating a series of processes to alternately repeat the series of processes to purify the harmful gas In the combustion device,

It selectively communicates with one of the purge valve P1 of the first ceramic heat storage material 1 and the purge valve P2 of the second ceramic heat storage material 2 at a predetermined time interval, and intermittently communicates with the blower fan 4. One side of the return pipe (5) communicating with the temporarily stored untreated harmful gas returned to the blowing fan (4) from the purge valve (P1 or P2) of the ceramic heat storage material (1 or 2) during the switching operation In operation, the buffer tank 6 is provided to be supplied to the combustion chamber 3 through the blowing fan and the corresponding ceramic heat storage material 1 or 2 so as to be purified.

Here, the upper part of the buffer tank (6) when the untreated raw gas is injected into the buffer tank, the air inside is discharged to the outside and a predetermined amount of untreated inlet gas is supplied to the combustion chamber through the blower fan (4) The bypass valve 7 is provided to allow the air to flow into the interior.

Between the return pipe 5 communicating with the buffer tank 6 and the transfer pipe 8 extending from the outside to the blower fan 4, a large amount of untreated harmful gas is instantaneously (about 2 seconds) during the switching operation. Partially open as it enters the tank (6), and during normal operation, a certain amount of untreated harmful gas in the buffer tank is sufficiently supplied to the combustion chamber (3) through the blower fan (4) through the corresponding ceramic heat storage material (1 or 2). A control valve 9 is provided which opens as much as possible.

On the other hand, the purge valve (P3) provided between the blowing fan (4) and the combustion chamber (3) can be opened during the switching operation, so that some of the untreated harmful gas does not pass through the ceramic heat storage material (1 or 2). It can be sent directly to the combustion chamber 3 for purification.

Referring to the operation of the heat storage combustion apparatus having a buffer tank configured as described above are as follows.

First, incomplete combustion of harmful gas flowing from the incinerator through the blowing fan 4 while the supply valve S1 and the discharge valve E2 are opened passes through the first preheated first ceramic heat storage material 1. The temperature is raised to temperature and flows into the combustion chamber 3.

Then, the harmful gas introduced into the combustion chamber 3 is burned at high temperature by a burner or the like to be purified, and then discharged into the atmosphere while losing heat while passing through the second ceramic heat storage material 2.

Then, when it is detected that the temperature of the purge gas discharged from the heat storage combustion apparatus to the atmosphere after a predetermined time rises above a predetermined value, a switching operation is performed to perform the first ceramic heat storage material 1 or the second ceramic heat storage material 2. The untreated gas remaining in the gas is recycled to the combustion chamber 3 through the purge valve P3 or the purge valve P1 or P2 by the blower fan 4 to be burned.

At this time, the untreated harmful gas remaining in the first ceramic heat storage material 1 or the second ceramic heat storage material 2 is a buffer tank (part) in a state in which the control valve 9 communicating with the blower fan 4 is partially opened. 6) Temporarily stored in the chamber, and after a certain time, the control valve 9 is sufficiently opened until the next normal operation, and then, through the blower fan 4, the combustion chamber 3 through the corresponding ceramic heat storage material 1 or 2; It is introduced into and can be completely purified through the above-described process (see Figure 3).

On the other hand, a bypass valve (7) is provided on the upper portion of the buffer tank (6) so that the internal pressure in the buffer tank can be automatically adjusted from the ceramic heat storage material (1 or 2) to the buffer tank (6) In other words, the inflow or outflow of untreated harmful gas can be freed.

As described above, the present invention is a certain amount of untreated harmful to be introduced into the combustion chamber through the blowing fan from the purge valve (P1) on the first ceramic heat storage material side or the purge valve (P2) on the second ceramic heat storage material side during the switching operation. The gas is temporarily stored and supplied to the combustion chamber through the blower fan and the corresponding ceramic heat storage material in the normal operation so that the gas can be completely purified.

Claims (3)

Hazardous gases generated during a predetermined combustion process are introduced into one of the first and second ceramic heat storage materials through a blower fan, heated up to a predetermined temperature, and then burned in a combustion chamber for purification. In a regenerative combustion device that purifies and processes harmful gases by alternately repeating a series of processes of cooling to a temperature and exhausting them into the atmosphere, One side of the return pipe which is selectively communicated with one of the purge valve (P1) of the first ceramic heat storage material and the purge valve (P2) of the second ceramic heat storage material at a predetermined time interval and intermittently communicating with the blowing fan. A buffer tank is provided to temporarily store a predetermined amount of untreated harmful gas returned to the blower fan from the ceramic heat storage material and supply it to the combustion chamber through the blower fan and the corresponding ceramic heat storage material for purification. Regenerative combustion device having a buffer tank characterized in that. The heat storage and combustion apparatus according to claim 1, wherein a bypass valve is provided at an upper portion of the buffer tank to allow air to enter and exit. According to claim 1, Between the return pipe in communication with the buffer tank and the transfer pipe extending from the outside to the blower fan during the switching operation when a large amount of untreated harmful gas flows into the buffer tank at the moment and partially open during normal operation The regenerative combustion device having a buffer tank, characterized in that the control valve is provided so that a predetermined amount of untreated harmful gas is sufficiently supplied to the combustion chamber through the blowing fan.