JP2003130328A - Method of controlling regenerative waste gas treatment equipment and regenerative waste gas treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regenerative waste gas treatment equipment provided with an exhaust heat recovery device capable of preventing the abnormal temperature rise in a combustion chamber even when a combustible element is contained in the waste gas to be processed. SOLUTION: This regenerative waste gas treatment equipment is provided with a by-pass means 2 for exhausting the gas in the combustion chamber 4 without passing the gas in a regenerator 3. The by-pass means 2 is provided with a first by-pass route 21 making the gas in the combustion chamber 4 pass in a heat exchanger 24 which heats a heating medium for exhaust heat recovery and exhausting, a second by-pass route 22 exhausting the gas in the combustion chamber 4 without passing the gas in the heat exchanger 24 and an exhaust amount adjusting means 23 capable of adjusting a first gas exhaust amount exhausted by the first by-pass route 21 and a second gas exhaust amount exhausted by the second by-pass route 22 individually. The exhaust amount adjusting means 23 adjusts the first gas exhaust amount based on the temperature or the pressure of the heating medium, and adjusts the second gas exhaust amount based on the temperature in the combustion chamber and the temperature or the pressure of the heating medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type exhaust gas treatment apparatus having an exhaust heat recovery apparatus and a control method thereof.

[0002]

2. Description of the Related Art Conventionally, as a heat storage deodorizing device of this type, 2
Has a first opening and a second opening that open toward one side,
A heat storage material configured to be capable of discharging a gas introduced into the inside from one of the opening portion and the second opening portion from the other, and containing a heat storage material capable of exchanging heat with the gas introduced into the inside. A plurality of chambers are arranged side by side, communicate with the first openings of the plurality of heat storage chambers, respectively, and a combustion chamber capable of burning gas introduced from at least one of the plurality of heat storage chambers, and the heat storage chamber to be treated. A supply path for supplying gas, an exhaust path for exhausting the treated gas from the heat storage chamber, and the second of the plurality of heat storage chambers.
Each opening communicates with the supply passage in one or more treatment states, communicates with the discharge passage in one or more treatment states different from the one or more treatment states, and in each treatment state, A communication switching means for switching a communication partner of the second opening so that there is at least one second opening communicating with the supply path and at least one second opening communicating with the discharge path; and the combustion chamber. There was an exhaust heat recovery device for recovering exhaust heat by discharging the gas of (3) through a heat exchanger that heats a heat medium for recovering exhaust heat (oil, water, steam, etc.).

Depending on the number of heat storage chambers, there are two-column heat storage chambers, three towers of three heat storage chambers, or a multi-column heat storage type exhaust gas treatment device having four or more heat storage chambers. However, since the basic processing principle is common, the heat storage chamber has 2
A brief explanation will be given by taking two two-tower type as an example. If the two heat storage chambers are the first and second heat storage chambers for convenience, the second heat storage chamber
The first processing state in which the opening communicates with the supply passage and the second opening of the second heat storage chamber communicates with the discharge passage, and conversely, the second treatment of the first heat storage chamber
There are two processing states, that is, a second processing state in which the opening is in communication with the discharge path and the second opening in the second heat storage chamber is in communication with the supply path. These two processing states are determined by the switching operation of the communication switching means. Alternates.

In the first treatment state, the exhaust gas to be treated passes through the first heat storage chamber and is supplied into the combustion chamber from the supply passage, and the components in the exhaust gas are decomposed by the high temperature oxidation treatment in the combustion burner provided in the combustion chamber. The treated exhaust gas passes through the second heat storage chamber and is discharged to the discharge passage. Here, the control of the combustion amount by the combustion burner is adjusted by the combustion control means so that the temperature in the combustion chamber detected by the temperature sensor provided in the combustion chamber falls within a predetermined set temperature range. The set temperature range is set based on the oxidative decomposition temperature of the component to be treated and the heat resistant temperature of the combustion chamber. When the exhaust gas subjected to the high-temperature oxidation treatment passes through the second heat storage chamber, the heat of the exhaust gas is stored in the heat storage material of the second heat storage chamber by heat exchange. Further, when the exhaust gas from the supply path passes through the first heat storage chamber, it is preheated by the stored heat of the exhaust gas stored in the heat storage material of the first heat storage chamber in the second processing state immediately before and is supplied to the combustion chamber. . In the second processing state, processing and phenomena opposite to those in the first processing state occur. Therefore, by alternately repeating the first and second treatment states, the retained heat of the exhaust gas subjected to the high temperature oxidation treatment is utilized for preheating the exhaust gas sequentially supplied from the supply path, so that the high temperature in the combustion chamber is increased. The energy consumption required for the oxidation treatment can be reduced, and the thermal efficiency can be improved.

In the three-tower type with three heat storage chambers, when the three heat storage chambers are first, second and third heat storage chambers for convenience, for example, the second opening of the first heat storage chamber communicates with the supply passage. A first processing state in which the second opening of the second heat storage chamber communicates with the discharge path,
A second processing state in which the second opening of the second heat storage chamber communicates with the supply passage and the second opening of the third heat storage chamber communicates with the discharge passage;
There are three processing states, that is, a third processing state in which the second opening of the heat storage chamber communicates with the supply passage and the second opening of the first heat storage chamber communicates with the discharge passage, and these three processing states communicate with each other. It is switched in order by the switching operation of the switching means. Also in this case,
The retained heat of the exhaust gas stored in the heat storage material of the second heat storage chamber in the first processing state is used for preheating of the exhaust gas supplied through the second heat storage in the second processing state, and the same applies. Is the first
Since it is also applicable to the third heat storage chamber, the heat of the exhaust gas subjected to the high temperature oxidation treatment is preheated one after another by repeating the respective processing states in sequence by the switching operation of the communication switching means. The energy consumption required for the high temperature oxidation treatment in the combustion chamber can be reduced and the thermal efficiency can be improved.

In the case of the three-column type, generally, one of the three heat storage chambers does not communicate with the supply passage or the discharge passage,
By communicating with the supply path of clean air for flushing and expelling the untreated gas remaining in the heat storage chamber into the combustion chamber, when discharging the treated exhaust gas from the combustion chamber to the discharge passage in the next processing state, A measure is taken to prevent the untreated gas from being discharged together. Therefore, the communication switching means also connects the second opening to the supply path of the flushing air.

In the case of the multi-tower type, in contrast to the above-mentioned two-tower type or three-tower type, only two or more heat storage chambers communicate with the supply passage or the discharge passage in each processing state. The treatment is similar to the two-column type and the three-column type.

The above is the description of the processing and operation principle in the main body portion of the heat storage type exhaust gas processing apparatus (the part that exhibits the heat storage type exhaust gas processing function). Next, the operation of the exhaust heat recovery device provided attached to the main body will be described.

Exhaust heat generated in the heat storage type exhaust gas treatment device is
It has been conventionally practiced to provide a heat exchanger in the discharge path and to take it out, but if this is done, heat is once exchanged in the heat storage chamber and the temperature drops, and the load on the heat exchanger (the amount of recovered heat energy consumed) is reduced. Even if the amount of combustion in the combustion chamber is changed when it fluctuates, there is a disadvantage that the response delays considerably, and the exhaust gas temperature in the exhaust passage fluctuates due to changes in the processing state by the communication switching means. . Therefore, an exhaust heat recovery apparatus has been proposed (see, for example, Japanese Patent No. 3095531) that directly uses the exhaust heat of the exhaust gas subjected to the high temperature oxidation treatment in the combustion chamber, and is put into practical use.

The above-mentioned exhaust heat recovery apparatus is specifically, for example, as shown in FIG. 3, a heat exchanger 24 and an exhaust heat recovery device for exhausting exhaust gas from the combustion chamber 4 via the heat exchanger 24. Gas exhaust passage 21, a damper 25 for adjusting the exhaust amount of the exhaust gas emitted from the gas exhaust passage 21, and a sensor 28 for detecting the temperature or pressure of the heat medium for exhaust heat recovery taken out from the heat exchanger 24. , A control means 30 for adjusting the opening degree of the damper 25 based on the detection value of the sensor 28. In the above configuration, the control means 3
When the temperature or pressure of the heat medium detected by the sensor 28 is higher than a predetermined set value, the opening degree of the damper 25 is reduced to reduce the exhaust gas discharge amount from the combustion chamber 4 to the gas discharge passage 21 and the heat medium is 0. When the temperature or pressure of the heat medium detected by the sensor 28 is lower than a predetermined set value, the reverse adjustment is performed. Therefore, the combustion chamber 4
Since the gas inside is used as the exhaust heat recovery target gas, the heat exchanger 24
Of the temperature of the exhaust gas supplied to the heat exchanger 24 is improved, and the exhaust gas is stably supplied to the heat exchanger 24 by reducing the influence of temperature fluctuation when the processing state is switched. In addition, the sensor 28
By adjusting the temperature or pressure of the heat medium by the control means 30, stable exhaust heat recovery becomes possible.

The reference numerals in FIG. 3 are the same as those in FIG. 1 showing the schematic structure of the heat storage type exhaust gas treatment apparatus according to the present invention.

[0012]

However, in the heat storage type exhaust gas treatment device having the above-mentioned conventional exhaust heat recovery device,
The following problems may occur under specific circumstances.

When the amount of exhaust gas discharged from the combustion chamber to the exhaust gas for exhaust heat recovery is decreased (or increased), the amount of exhaust gas discharged through the heat storage chamber increases (or decreases) by that amount, The amount of heat stored in the heat storage chamber increases (or decreases).
In the next processing state, the heat energy that is preheated from the heat storage chamber and given to the gas to be processed that passes through this heat storage chamber and is supplied to the combustion chamber increases (or decreases). As a result, the temperature of the exhaust gas supplied to the combustion chamber from the first opening of the heat storage chamber rises (or falls), and the temperature detected by the temperature sensor provided in the combustion chamber rises (or falls). Is
The amount of fuel and air supplied to the combustion burner is adjusted to reduce (or increase) the amount of combustion. That is, it is necessary to increase / decrease the thermal energy input to the combustion chamber through the combustion burner by increasing / decreasing the amount of exhaust gas discharged from the combustion chamber to the exhaust heat recovery gas discharge passage.

Therefore, when the load on the heat exchanger is reduced while the amount of exhaust gas supplied to the heat exchanger is constant, the temperature (or pressure) of the heat medium in the heat exchanger rises, so that the sensor detects the heat medium. The opening of the damper is adjusted by the temperature (or pressure), the amount of exhaust gas supplied to the heat exchanger decreases,
The amount of exhaust gas discharged from the combustion chamber through the heat storage chamber increases. As a result, the heat energy stored in the heat storage chamber increases, and the temperature of the exhaust gas passing through the heat storage chamber and supplied to the combustion chamber rises in the next processing state. Here, the temperature detected by the temperature sensor provided in the combustion chamber becomes high, and the combustion control means adjusts the amount of fuel and air supplied to the combustion burner to reduce the combustion amount, thus suppressing the temperature rise in the combustion chamber. To be done. However, when the exhaust gas to be treated contains a combustible component such as an organic solvent, this combustible component is preheated in the heat storage chamber, and if heated above the ignition temperature of the combustible component, it will self-combust and generate thermal energy. When the heat energy generated by the combustible component is large, the temperature increase in the combustion chamber cannot be suppressed only by adjusting the combustion amount by the combustion burner, and the combustion chamber temperature continues to increase. There is also a risk of inducing an abnormal temperature rise in which the combustion chamber temperature reaches or exceeds the heat resistant temperature of the combustion chamber or the like.

The present invention has been made in view of the above problems, and an object thereof is to prevent an abnormal temperature rise in the combustion chamber even when the exhaust gas to be treated contains a combustible component. Another object of the present invention is to provide a heat storage type exhaust gas treatment device provided with a heat recovery device and a control method thereof.

[0016]

The first characteristic constitution of the heat storage type exhaust gas treatment apparatus according to the present invention for solving the above-mentioned problems is as described in claim 1 of the scope of claims.
Has a first opening and a second opening that open toward one side,
A heat storage material configured to be capable of discharging a gas introduced into the inside from one of the opening portion and the second opening portion from the other, and containing a heat storage material capable of exchanging heat with the gas introduced into the inside. A plurality of chambers are arranged side by side, communicate with the first openings of the plurality of heat storage chambers, respectively, and a combustion chamber capable of burning gas introduced from at least one of the plurality of heat storage chambers, and the heat storage chamber to be treated. A supply path for supplying gas, an exhaust path for exhausting the treated gas from the heat storage chamber, and the second of the plurality of heat storage chambers.
Each opening communicates with the supply passage in one or more treatment states, communicates with the discharge passage in one or more treatment states different from the one or more treatment states, and in each treatment state, A communication switching means for switching a communication partner of the second opening so that there is at least one second opening communicating with the supply path and at least one second opening communicating with the discharge path; and the combustion chamber. And a bypass means for discharging the gas in the combustion chamber without passing through the heat storage chamber, wherein the bypass means heats the gas in the combustion chamber to a heat medium for recovering exhaust heat. And a second bypass path for discharging the gas in the combustion chamber without passing through the heat exchanger.
A bypass path; and a discharge amount adjusting means capable of individually adjusting a first gas discharge quantity discharged from the combustion chamber through the first bypass path and a second gas discharge quantity discharged through the second bypass path. , The emission control means,
The first gas discharge amount is adjusted based on a detection value of a first sensor that detects the temperature or pressure of the heat medium, and the second gas is adjusted.
The gas discharge amount is adjusted based on the detection value of at least one of the first sensor and the second sensor that detects the temperature in the combustion chamber.

The second characteristic construction has a first opening and a second opening which open in two directions, as described in claim 2 of the scope of the claims, and the first opening and the second opening A plurality of heat storage chambers configured to be able to discharge gas introduced into the inside from any one of the second openings from the other and to accommodate a heat storage material capable of exchanging heat with the gas introduced into the inside. A combustion chamber that is juxtaposed and communicates with the first opening of each of the plurality of heat storage chambers and is capable of burning gas introduced from at least one of the plurality of heat storage chambers; A supply passage for discharging the treated gas from the heat storage chamber, and the second openings of the plurality of heat storage chambers communicate with the supply passage in one or more processing states, and the one or more Communicating with the discharge path in one or more treatment states different from the treatment state of In the processing state, the communication switching means for switching the communication partner of the second opening so that there is at least one second opening communicating with the supply passage and at least one second opening communicating with the discharge passage. And a bypass means for discharging the gas in the combustion chamber without passing through the heat storage chamber, wherein the bypass means collects the gas in the combustion chamber for exhaust heat recovery. A first bypass passage through which a heat exchanger for heating the heat medium is discharged and discharged, a second bypass passage through which gas in the combustion chamber is discharged without passing through the heat exchanger, and the combustion chamber through the combustion chamber And a discharge amount adjusting means capable of individually adjusting the discharge amount of the first gas discharged through the first bypass route and the discharge amount of the second gas discharged through the second bypass route. One gas discharge amount is adjusted based on the detection value of the second sensor that detects the temperature in the combustion chamber, and the second gas discharge amount is set to the detection value of the first sensor that detects at least the temperature or pressure of the heat medium. There is a point to adjust based on.

The first characteristic configuration of the control method of the heat storage type exhaust gas treatment apparatus according to the present invention for solving the above-mentioned problems is, as described in claim 3 of the scope of the claims, opening in two directions. A gas that has a first opening and a second opening and is configured to be able to discharge the gas introduced into the inside from one of the first opening and the second opening from the other and introduce the gas into the inside. A plurality of heat storage chambers accommodating a heat exchange material capable of exchanging heat between the two heat storage chambers are arranged in parallel, communicate with the first openings of the plurality of heat storage chambers, and are introduced from at least one of the plurality of heat storage chambers A combustion chamber capable of burning the gas, a supply path for supplying the gas to be treated to the heat storage chamber, an exhaust path for discharging the treated gas from the heat storage chamber, and the second openings of the plurality of heat storage chambers. Separately, in one or more processing states, in communication with the supply path, In one or more treatment states different from the physical state, and in each treatment state, the second opening communicating with the supply passage and the second opening communicating with the discharge passage are provided. Each of which has at least one communication switching means for switching the communication partner of the second opening, and a bypass means for discharging the gas in the combustion chamber without passing through the heat storage chamber, A bypass means for discharging the gas in the combustion chamber through a heat exchanger that heats a heat medium for exhaust heat recovery, and the gas in the combustion chamber without passing through the heat exchanger. A method of controlling a heat storage type exhaust gas treatment device configured to include a second bypass path for discharging, wherein a first gas discharge amount discharged from the combustion chamber by the first bypass path is a temperature of the heat medium or Check pressure A second gas discharge amount which is adjusted based on a detection value of the first sensor and which is discharged from the combustion chamber by the second bypass path, and which detects a temperature in the first sensor and the combustion chamber. The point is that adjustment is performed based on the detection value of at least one of the sensors.

The second characteristic configuration has a first opening and a second opening that open in two directions, as described in claim 4 of the scope of claims, and the first opening and the second opening A plurality of heat storage chambers configured to be able to discharge gas introduced into the inside from any one of the second openings from the other and to accommodate a heat storage material capable of exchanging heat with the gas introduced into the inside. A combustion chamber that is juxtaposed and communicates with the first opening of each of the plurality of heat storage chambers and is capable of burning gas introduced from at least one of the plurality of heat storage chambers; A supply passage for discharging the treated gas from the heat storage chamber, and the second openings of the plurality of heat storage chambers communicate with the supply passage in one or more processing states, and the one or more Communicating with the discharge path in one or more treatment states different from the treatment state of In the processing state, the communication switching means for switching the communication partner of the second opening so that there is at least one second opening communicating with the supply path and at least one second opening communicating with the discharge path. And a bypass means for discharging the gas in the combustion chamber without passing through the heat storage chamber, the heat exchange means for heating the heat medium for exhaust heat recovery of the gas in the combustion chamber. A method for controlling a heat storage type exhaust gas treatment device, comprising: a first bypass path for passing through a heat exchanger and discharging the gas; and a second bypass path for discharging gas in the combustion chamber without passing through the heat exchanger. The first gas discharge amount discharged from the combustion chamber through the first bypass path is adjusted based on a detection value of a second sensor that detects a temperature in the combustion chamber, and the first gas discharge amount from the combustion chamber is adjusted. 2 bye The second gas emissions emitted by the scan path, in terms of adjusted based on the detected value of the first sensor for detecting the temperature or pressure of at least the heat medium.

The operation and effect of the above characteristic structure will be described below. According to the first characteristic configuration of the heat storage type exhaust gas treatment apparatus or the control method of the heat storage type exhaust gas treatment apparatus, the load of the heat exchanger in the case where the exhaust gas to be treated contains a combustible component such as an organic solvent. Even if the temperature decreases, it is possible to prevent an abnormal temperature rise in the combustion chamber by adjusting the amount of exhaust gas discharged from the combustion chamber via the second bypass path without passing through the heat storage chamber.

Hereinafter, the case where the second gas discharge amount is adjusted based on the detection amount of the first sensor and the case where it is adjusted based on the detection amount of the second sensor will be described separately. In the former case,
Since both the first gas discharge amount and the second gas discharge amount are adjusted based on the detection amount of the first sensor, the control algorithm can be simplified. That is, when the load of the heat exchanger decreases, the temperature (or pressure) of the heat medium of the heat exchanger rises, and as the detected value of the first sensor rises, the first gas discharge amount supplied to the heat exchanger. The amount of exhaust gas discharged through the heat storage chamber is kept constant by increasing the amount of the second gas discharge by the amount of decrease in the heat storage chamber. Since this is not done, it is possible to prevent the temperature in the combustion chamber from fluctuating with load changes in the heat exchanger, and as a result, it is possible to avoid an abnormal temperature rise. Also, the first
Due to the reduction of the gas discharge amount, the rise of the heat medium temperature (or pressure) is suppressed, and the stable exhaust heat recovery can be maintained.

Therefore, in the former case, when the control temperature in the combustion chamber is set below the ignition temperature of the combustible component contained in the exhaust gas, or even when the control temperature is above the ignition temperature, the thermal energy of the combustible component generated Even if there is a fluctuation, the temperature inside the combustion chamber can be stably controlled even if the load on the heat exchanger is reduced in the state where the temperature fluctuation inside the combustion chamber due to the fluctuation can be absorbed by adjusting the combustion amount in the combustion chamber. Is.

In the latter case, when the load on the heat exchanger decreases, the temperature (or pressure) of the heat medium of the heat exchanger rises, and the detected value of the first sensor rises, so The supplied first gas discharge amount decreases, the exhaust gas amount temporarily discharged through the heat storage chamber increases, and the temperature in the combustion chamber rises. Since the second sensor detects this temperature rise,
By increasing the second gas discharge amount based on the detection value of the second sensor, the amount of exhaust gas discharged through the temporarily increased heat storage chamber is reduced to the original state, and the temperature in the combustion chamber rises. Is suppressed. As a result, it is possible to prevent the temperature in the combustion chamber from fluctuating with the load change of the heat exchanger, and as a result, it is possible to avoid an abnormal temperature rise. Further, the decrease of the first gas discharge amount suppresses the rise of the heat medium temperature (or pressure), and the stable exhaust heat recovery can be maintained.

Further, in the latter case, since the second gas discharge amount is directly adjusted based on the detection value of the second sensor, the amount of combustible components in the exhaust gas supplied to the combustion chamber increases, and Even if the temperature rise due to the combustion of the combustible component exceeds the absorbable range due to the adjustment of the combustion amount, it is possible to suppress the temperature rise in the combustion chamber by increasing the second gas discharge amount.

In the latter case, the temperature inside the combustion chamber slightly rises even temporarily, so the former and the latter are combined to make the second gas emission amount the detection amount of the first sensor and the second sensor. By making adjustments based on this, more stable adjustment of the combustion chamber temperature becomes possible.

According to the second characteristic constitution of the heat storage type exhaust gas treatment apparatus or the control method of the heat storage type exhaust gas treatment apparatus, in the case where the exhaust gas to be treated contains a combustible component such as an organic solvent, the heat exchanger. Even if the load decreases, the abnormal temperature rise in the combustion chamber can be prevented by adjusting the amount of exhaust gas discharged from the combustion chamber via the second bypass path without passing through the heat storage chamber. That is, the same effect as that of the first characteristic configuration can be obtained.

Specifically, when the load on the heat exchanger is reduced,
As the heat medium temperature (or pressure) of the heat exchanger rises and the detection value of the first sensor rises, the second gas discharge amount is increased, so that the amount of exhaust gas discharged through the heat storage chamber As a result, the heat exchange mediated by the heat storage chamber is suppressed, the temperature of the exhaust gas supplied into the combustion chamber decreases, and the temperature inside the combustion chamber decreases. Since the second sensor detects this temperature decrease, the first gas discharge amount supplied to the heat exchanger is reduced based on the detection value of the second sensor. When the first gas emission amount decreases, the amount of exhaust gas discharged through the heat storage chamber that has temporarily decreased increases, so that heat exchange mediated by the heat storage chamber is promoted and the temperature of the exhaust gas supplied to the combustion chamber rises. Then, the temperature in the combustion chamber rises so as to return to the original state. As a result, it is possible to prevent the temperature in the combustion chamber from fluctuating with the load change of the heat exchanger, and as a result, it is possible to avoid an abnormal temperature rise. Further, the decrease of the first gas discharge amount suppresses the rise of the heat medium temperature (or pressure), and the stable exhaust heat recovery can be maintained.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a heat storage type exhaust gas treatment apparatus according to the present invention (hereinafter referred to as "the present invention apparatus") and a control method for the heat storage type exhaust gas treatment apparatus (hereinafter referred to as the "present invention method"). Embodiments of will be described with reference to the drawings.

As shown in FIG. 1, the first embodiment of the device of the present invention comprises a main body 1 and a bypass means 2. The main body 1 includes a plurality of heat storage chambers 3, a combustion chamber 4,
A supply path 5, an exhaust path 6, a communication switching means 7, and a combustion control means 8 are provided. In the present embodiment, as shown in FIGS. 1 and 2, a two-column type in which the main body 1 has two heat storage numbers will be described as an example.

Here, each heat storage chamber 3 has a first opening 9 and a second opening 10 which are open in two directions, and the inside is opened from one of the first opening 9 and the second opening 10. The introduced gas is configured to be discharged from the other, and the heat storage material 11 capable of exchanging heat with the gas introduced inside is housed. The combustion chamber 4 communicates with the first opening 9 of each combustion chamber 3, and the combustion burner 12 and the combustion chamber 4 for oxidizing and treating the components to be treated in the exhaust gas introduced from one heat storage chamber 3 therein. A temperature sensor 13 capable of detecting the internal temperature is provided. The supply passage 5 supplies the exhaust gas to be treated to the combustion chamber 4 through any one of the heat storage chambers 3, and the discharge passage 6 includes the treated exhaust gas subjected to the oxidative decomposition treatment in the combustion chamber. It is configured to be discharged through the heat storage chamber 3.

The communication switching means 7 is the second of the plurality of heat storage chambers 3.
Each of the openings 10 communicates with the supply path 5 in one or more processing states, communicates with the discharge path 6 in one or more processing states different from the one or more processing states, and in each processing state, Second opening 10 communicating with supply path 5 and discharge path 6
The communication partner of the second opening 10 is switched so that there is at least one second opening 10 communicating with the second opening 10.

If the description is limited to the two-column type, the communication switching means 7 has an inlet damper inserted between the supply pipe 5 and the connecting pipe 10a connected to the second opening 10 of the one heat storage chamber 3. 7a, an outlet damper 7b inserted between the connecting pipe 10a and the discharge passage 6, and an inlet damper inserted between the connecting pipe 10b connected to the second opening 10 of the other heat storage chamber 3 and the supply passage 5. 7c, an outlet damper 7d inserted between the connecting pipe 10b and the discharge path 6, and each inlet and outlet damper 7a.
The open / close control mechanism (not shown) of 7d. In the case of the two-column type, there are two processing states, and the communication switching means 7 communicates one second opening 10 of the two heat storage chambers 3 with the supply path 5 in the first processing state and the other one. The inlet and outlet dampers 7 are communicated for each processing state so that the two openings 10 communicate with the discharge path 6 and the communication state is reversed in the second processing state.
The opening and closing control of a to 7d is performed to sequentially switch the communication partner of the second opening 10.

The combustion control means 8 determines the oxidative decomposition temperature of the components to be treated in the exhaust gas (650 to 1100 ° C. in the case of odor components (including dioxins)) and the heat resistant temperature of the combustion chamber. The combustion amount by the combustion burner 12 (supply amount of fuel and combustion air) is adjusted based on the temperature detected by the temperature sensor 13 so as to fall within the set temperature range set based on

Since the main body 1 of this embodiment has the same structure as the main body of the two-column heat storage type exhaust gas treatment apparatus described in the prior art, its treatment and operation principle are the same as those of the conventional art. The explanation is omitted because it is the same as that explained in the technology.

The bypass means 2 is a two-system first bypass path 2 for discharging the gas in the combustion chamber 4 without passing through the heat storage chamber 3.
The first and second bypass paths 22, and the first gas discharge quantity discharged from the combustion chamber 4 by the first bypass path 21 and the second gas discharge quantity discharged by the second bypass path 22 are adjustable separately. It is provided with a quantity adjusting means 23. Furthermore, a heat exchanger 24 is provided in the middle of the first bypass path 21, and an exhaust heat recovery device that heats the heat medium for exhaust heat recovery by the retained heat of the exhaust gas passing through the first bypass path 21 to recover the exhaust heat is provided. Is forming. The second bypass path 22 discharges the gas in the combustion chamber 4 to the outside as it is without providing a heat exchanger on the way, to the discharge path 6 in the present embodiment.
Further, the first damper 25, which can adjust the first gas discharge amount, is provided upstream of the heat exchanger 24 in the first bypass path 21.
The second damper 26 capable of adjusting the second gas discharge amount in the bypass path 22 is capable of detecting the outlet temperature of the heat medium heated by the heat exchanger 24 downstream of the heat exchanger 24 of the heat medium pipe 27. The first sensor 28 and the second sensor 29 capable of detecting the temperature inside the combustion chamber 4 are provided in the combustion chamber 4, respectively. It should be noted that the combustion chamber 4 can be provided without separately providing the second sensor 29.
The temperature sensor 13 provided for internal combustion control may also be used as the second sensor 29.

Based on the value detected by the first sensor 28, the discharge amount adjusting means 23 reduces the opening of the first bumper 25 to decrease the first gas discharge amount when the temperature of the heat medium rises.
On the contrary, when the temperature of the heat medium decreases, the opening degree of the first bumper 25 is increased to increase the first gas discharge amount.
The opening degree of the bumper 25 is adjusted. Also, the emission control means 2
3 indicates that when the temperature inside the combustion chamber 4 rises based on the detection value of the second sensor 29, the opening degree of the second bumper 26 is increased to increase the second gas discharge amount, and conversely, inside the combustion chamber 4. If the temperature of the second bumper 26 decreases,
The opening degree of the second bumper 26 is adjusted so as to reduce the gas discharge amount. In addition, the discharge amount adjusting means 23 is the first
And the method of the present invention is realized by executing the adjustment processing of the second gas discharge amount.

Next, the adjustment of the first and second gas discharge amounts by the discharge amount adjusting means 23 will be described based on a concrete example. Here, it is assumed that the exhaust gas to be treated supplied to the combustion chamber 4 contains a combustible organic solvent. Further, the first set temperature for controlling the temperature inside the combustion chamber 4 by the combustion control means 8 is 810 ° C., and the second set temperature inside the combustion chamber 4 for controlling the second gas discharge amount by the discharge amount adjusting means 23 is 850 ° C. It is assumed that the third set temperature of the heat medium for adjusting the first gas discharge amount by the discharge amount adjusting means 23 is 200 ° C.

Here, assuming that the temperature inside the combustion chamber 4 is 820 ° C., the combustion control means 8 determines that the temperature inside the combustion chamber 4 is higher than the first set temperature of 810 ° C.
The combustion amount in the combustion chamber 4 and the supplied combustion air amount are zero without performing the combustion in 2. In other words, the combustion energy of the combustible components in the exhaust gas supplied into the combustion chamber 4
The internal temperature is 820 ° C. Next, assuming a case where the load on the heat exchanger 24 decreases under such a situation, the outlet temperature of the heat medium rises and the temperature detected by the first sensor 28 rises. When the detected temperature exceeds the third set temperature 200 ° C., the opening degree of the first damper 25 is reduced to reduce the first gas discharge amount. As a result, the amount of high-temperature exhaust gas from the combustion chamber 4 flowing into the heat exchanger 24 decreases, the outlet temperature of the heat medium decreases, and the temperature is controlled to the third set temperature. On the other hand, the combustion chamber 4
The exhaust gas amount (first gas exhaust amount) discharged from the vehicle through the first bypass route 21 decreases, so the exhaust gas amount passing through the heat storage chamber 3 and discharged to the exhaust route 6 increases by the decrease amount. The heat energy given from the heat storage chamber 3 to the exhaust gas to be processed which passes through the heat storage chamber 3 and is supplied to the combustion chamber 4 increases. Therefore, the temperature inside the combustion chamber 4 rises above 820 ° C. Here, when the temperature inside the combustion chamber 4 detected by the second sensor 29 exceeds the second set temperature 850 ° C., the discharge amount adjusting means 23 increases the opening degree of the second bumper 26 to increase the second gas discharge amount. Is increased to suppress the increase in heat energy given to the exhaust gas to be processed which is supplied to the combustion chamber 4 through the heat storage chamber 3 and is controlled so that the temperature inside the combustion chamber 4 does not exceed 850 ° C. . Therefore, abnormal temperature rise inside the combustion chamber 4 can be avoided in advance.

Next, another embodiment (second, third and fourth embodiments) with respect to the first embodiment will be described. The only difference between the second and third embodiments and the first embodiment is the difference in which sensor the second gas discharge amount of the discharge amount adjusting means 23 is adjusted based on the detection value of which sensor. The adjustment of the first gas discharge amount in the adjusting means 23, the configuration of the entire apparatus of the present invention, and the configuration of each part other than the emission amount adjusting means 23 are the same as those in the first embodiment. Further, the only difference between the fourth embodiment and the first embodiment is the difference in which sensor the detection value of the first and second gas discharge amounts of the discharge amount adjusting means 23 is adjusted based on. Overall configuration of the device of the present invention, and
The configuration of each part other than the discharge amount adjusting means 23 is the same as that of the first embodiment.

In the second embodiment, the discharge amount adjusting means 23
Adjusts the first gas discharge amount and the second gas discharge amount based on the detection value of the first sensor 28. Specifically, the first
Based on the detection value of the sensor 28, when the temperature of the heat medium rises, the opening degree of the first bumper 25 is reduced to reduce the first gas discharge amount, and the opening degree of the second bumper 26 is increased to increase the second amount. When the gas discharge amount is increased, and conversely, when the temperature of the heat medium is decreased, the opening amount of the first bumper 25 is increased to increase the first gas discharge amount, and at the same time, the opening amount of the second bumper 26 is decreased. The opening amount of the first bumper 25 and the second bumper 26 is adjusted so as to reduce the 2 gas discharge amount and maintain the sum of the 1st and 2nd gas discharge amounts constant regardless of the outlet temperature of the heat medium. . As a result, even if the load of the heat exchanger 24 changes, the total sum of the first and second gas emissions does not change,
Since the thermal energy given to the exhaust gas to be treated that passes through the heat storage chamber 3 and is supplied to the combustion chamber 4 does not change, the temperature inside the combustion chamber 4 can be prevented from being affected by the load fluctuation of the heat exchanger 24. .

In the second embodiment, when the load on the heat exchanger 24 is reduced, unlike the first embodiment, the temperature rise inside the combustion chamber 4 is estimated in advance and the second gas discharge amount is increased in advance. Therefore, the influence of the load fluctuation of the heat exchanger 24 can be better avoided as compared with the first embodiment. However,
When the content of the combustible component in the exhaust gas supplied into the combustion chamber 4 fluctuates, the temperature rise inside the combustion chamber 4 may occur due to the fluctuation, and is caused by other than the load fluctuation of the heat exchanger 24. In order to avoid the abnormal temperature rise inside the combustion chamber 4, the first embodiment is excellent.

Therefore, in the third embodiment, the first and second
The configuration has both features of the embodiment.
That is, the discharge amount adjusting means 23 adjusts the second gas discharge amount based on both detection values of the first sensor 28 and the second sensor 29. Specifically, based on the detection value of the first sensor 28, when the temperature of the heat medium rises, the opening degree of the first bumper 25 is reduced to reduce the first gas discharge amount and the second bumper 26 is opened. When the temperature of the heat medium decreases, the first bumper 25 increases.
Is increased to increase the first gas discharge amount, the second bumper 26 is decreased to decrease the second gas discharge amount, and the sum of the first and second gas discharge amounts is calculated as The opening degrees of the first bumper 25 and the second bumper 26 are adjusted so that the medium temperature is maintained constant regardless of the outlet temperature. As a result,
Even if the load of the heat exchanger 24 fluctuates, the total amount of the first and second gas emissions does not fluctuate. Therefore, the heat energy given to the exhaust gas to be processed which passes through the heat storage chamber 3 and is supplied to the combustion chamber 4. Since it does not change, it is possible to prevent the temperature inside the combustion chamber 4 from being affected by the load fluctuation of the heat exchanger 24. Also,
When adjusting the second gas discharge amount, while adjusting based on the detection value of the first sensor 28, the detection value of the second sensor, that is, the temperature inside the combustion chamber 4 is a predetermined set value (second set temperature). ) Is exceeded, the opening degree of the second bumper 26 is increased to increase the second gas discharge amount, and the second exhaust gas is supplied to the exhaust gas to be processed which passes through the heat storage chamber 3 and is supplied to the combustion chamber 4. The temperature energy inside the combustion chamber 4 is suppressed by adjusting the generated heat energy to be small.

Since the third embodiment has the adjustment of the second gas discharge amount based on the detection value of the second sensor, it is not always necessary to keep the sum of the first and second gas discharge amounts constant. There is no. That is, when the load on the heat exchanger 24 is reduced, the first gas emission amount is decreased by the increase in the detection value of the first sensor 28, but the decrease amount is not all the increase amount of the second gas emission amount but the increase amount. The minute may be less than or equal to the decrease. Therefore, along with this, a certain increase in the thermal energy given to the exhaust gas to be treated that passes through the heat storage chamber 3 and is supplied to the combustion chamber 4, that is, the temperature inside the combustion chamber 4 is expected to rise, If the rise is equal to or lower than the second preset temperature, the exhaust gas passing through the heat storage chamber 3 and discharged from the combustion chamber 4 has higher thermal efficiency, and thus the highly efficient operation of the device of the present invention can be achieved.

Next, a fourth embodiment will be described. In the fourth embodiment, the discharge amount adjusting means 23 includes the first sensor 2
If the temperature of the heat medium rises based on the detection value of 8, the second
The opening degree of the bumper 26 is increased to increase the first gas discharge amount, and conversely, when the temperature of the heat medium is decreased, the opening degree of the second bumper 26 is decreased to decrease the second gas discharge amount.
The opening degree of the second bumper 26 is adjusted. Further, the discharge amount adjusting means 23 decreases the opening amount of the first bumper 25 to decrease the first gas discharge amount when the temperature inside the combustion chamber 4 rises, based on the detection value of the second sensor 29, to decrease the first gas discharge amount. In addition, the opening degree of the first bumper 25 is adjusted so that the opening degree of the first bumper 25 is increased and the first gas discharge amount is increased when the temperature inside the combustion chamber 4 decreases. The method of the present invention is realized by the discharge amount adjusting means 23 executing the adjustment process of the first and second gas discharge amounts as described above. In the fourth embodiment, the correspondence relationship between the detection values of the first sensor 28 and the second sensor 29 and the first and second gas discharge amounts is opposite to that of the first embodiment.

Next, the adjustment of the first and second gas discharge amounts by the discharge amount adjusting means 23 in the fourth embodiment will be described based on a concrete example. Here, it is assumed that the exhaust gas to be treated supplied to the combustion chamber 4 contains a combustible organic solvent. Further, the first set temperature for controlling the temperature inside the combustion chamber 4 by the combustion control means 8 is 810 ° C., and the fourth set temperature inside the combustion chamber 4 for controlling the first gas discharge amount by the discharge amount adjusting means 23 is 835 ° C. The fifth preset temperature of the heat medium for adjusting the second gas discharge amount by the discharge amount adjusting means 23 is 20.
The case of 0 ° C is assumed.

Here, assuming that the temperature inside the combustion chamber 4 is 835 ° C., the combustion control means 8 determines that the temperature inside the combustion chamber 4 is higher than the first set temperature of 810 ° C.
The combustion amount in the combustion chamber 4 and the supplied combustion air amount are zero without performing the combustion in 2. In other words, the combustion energy of the combustible components in the exhaust gas supplied into the combustion chamber 4
The internal temperature is 820 ° C. Next, assuming a case where the load on the heat exchanger 24 decreases under such a situation, the outlet temperature of the heat medium rises and the temperature detected by the first sensor 28 rises. When the detected temperature exceeds the fifth set temperature 200 ° C., the opening degree of the second damper 26 is increased to increase the second gas discharge amount. As a result, the amount of exhaust gas discharged through the heat storage chamber 3 is reduced by the increase amount, so that the exhaust gas to be processed supplied through the heat storage chamber 3 and supplied to the combustion chamber 4 is given from the heat storage chamber 3. The heat energy generated is reduced, and the temperature inside the combustion chamber 4 drops below 835 ° C. Where the second
When the sensor 29 detects a temperature decrease in the combustion chamber 4 below the fourth set temperature 830 ° C., the emission amount adjusting means 23 makes the first
Since the opening degree of the bumper 25 is reduced to reduce the amount of high-temperature exhaust gas (first gas discharge amount) flowing from the combustion chamber 4 into the heat exchanger 24, the outlet temperature of the heat medium is lowered to the fifth setting. The temperature is controlled at 200 ° C. Further, the first gas discharge amount decreases, and the amount of exhaust gas discharged through the heat storage chamber 3 that has decreased temporarily returns to the original state, so that the temperature inside the combustion chamber 4 that has decreased temporarily is The temperature rises so as to return to 835 ° C. and is controlled to a constant temperature.

Next, another embodiment of the first to fourth embodiments will be described.

<1> In each of the above embodiments, the main body 1 of the device of the present invention is a two-column type for the sake of simplicity of description, but
The number of heat storage chambers 3 in the main body 1 is not limited to two, and the main body 1 may be a three-column type or a multi-column type. Whether the main body 1 is a three-tower type or a multi-tower type,
The effect of the bypass means 2 in the device of the present invention is the same as in the case of the two-column type.

<2> In each of the above embodiments, the first sensor 2
Although a temperature sensor capable of detecting the outlet temperature of the heat medium heated by the heat exchanger 24 is used as 8, a pressure sensor capable of detecting the pressure of the heat medium may be used.

<3> In the specific examples of the above embodiments, the discharge amount adjusting means 23 is the first sensor 28 or the second sensor 2.
The case where the opening degree of the first bumper 25 or the second bumper 26 is adjusted by the magnitude comparison between 9 and the corresponding set temperature has been described, but such opening degree adjustment is performed by the variation amount of the detection value of each sensor 28, 29. Alternatively, it may be performed based on the changing speed. Further, the adjustment based on the variation amount or the variation speed and the adjustment based on the magnitude comparison with the set temperature may be combined.

<4> In each of the above-mentioned embodiments, the first bypass route 21 and the second bypass route 22 are each only one system, but each bypass route 21, 22 may be two or more systems. I do not care.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an embodiment of a heat storage type exhaust gas treatment apparatus according to the present invention.

FIG. 2 is a cutaway perspective view showing a main body in an embodiment of a heat storage type exhaust gas treatment apparatus according to the present invention.

FIG. 3 is a diagram showing a schematic configuration of a conventional heat storage type exhaust gas treatment device.

[Explanation of symbols] 1: Main body 2: Bypass means 3: Heat storage room 4: Combustion chamber 5: Supply path 6: Discharge path 7: Communication switching means 8: Combustion control means 9: First opening 10: Second opening 11: Heat storage material 12: Combustion burner 13: Temperature sensor 21: First bypass route 22: Second bypass route 23: Emission control means 24: Heat exchanger 25: First damper 26: Second damper 27: Heat medium piping 28: First sensor 29: Second sensor

Claims (4)

[Claims] 1. A first opening and a second opening that open in two directions are provided, and a gas introduced into the inside from one of the first opening and the second opening can be discharged from the other. A plurality of heat storage chambers configured to accommodate a heat storage material capable of exchanging heat with the gas introduced into the inside are juxtaposed, and communicate with the first openings of the plurality of heat storage chambers, respectively. A combustion chamber capable of combusting a gas introduced from at least one of the heat storage chambers, a supply path for supplying the gas to be treated to the heat storage chamber, an exhaust path for discharging the processed gas from the heat storage chamber, Each of the second openings of the heat storage chamber communicates with the supply passage in one or more treatment states, and communicates with the discharge passage in one or more treatment states different from the one or more treatment states, and , In each processing state, the second opening communicating with the supply path and the A communication switching unit that switches a communication partner of the second opening so that there is at least one second opening that communicates with the outlet, and the gas in the combustion chamber is discharged without passing through the heat storage chamber. A heat storage type exhaust gas treatment apparatus comprising: a bypass means, wherein the bypass means discharges the gas in the combustion chamber through a heat exchanger that heats a heat medium for recovering exhaust heat.
A bypass path; a second bypass path for discharging the gas in the combustion chamber without passing through the heat exchanger; a first gas discharge amount discharged from the combustion chamber by the first bypass path; Discharge amount adjusting means capable of individually adjusting the discharge amount of the second gas discharged through the bypass path, wherein the discharge amount adjusting means detects the first gas discharge amount by the temperature or pressure of the heat medium. The second gas discharge amount is adjusted based on the detection value of at least one of the first sensor and the second sensor that detects the temperature in the combustion chamber. Heat storage type exhaust gas treatment device to be. 2. A first opening and a second opening that open in two directions are provided, and a gas introduced into the inside from one of the first opening and the second opening can be discharged from the other. A plurality of heat storage chambers configured to accommodate a heat storage material capable of exchanging heat with the gas introduced into the inside are juxtaposed, and communicate with the first openings of the plurality of heat storage chambers, respectively. A combustion chamber capable of combusting a gas introduced from at least one of the heat storage chambers, a supply path for supplying the gas to be treated to the heat storage chamber, an exhaust path for discharging the processed gas from the heat storage chamber, Each of the second openings of the heat storage chamber communicates with the supply passage in one or more treatment states, and communicates with the discharge passage in one or more treatment states different from the one or more treatment states, and , In each processing state, the second opening communicating with the supply path and the A communication switching unit that switches a communication partner of the second opening so that there is at least one second opening that communicates with the outlet, and the gas in the combustion chamber is discharged without passing through the heat storage chamber. A heat storage type exhaust gas treatment apparatus comprising: a bypass means, wherein the bypass means discharges the gas in the combustion chamber through a heat exchanger that heats a heat medium for recovering exhaust heat.
A bypass path; a second bypass path for discharging the gas in the combustion chamber without passing through the heat exchanger; a first gas discharge amount discharged from the combustion chamber by the first bypass path; A second sensor for detecting the temperature of the inside of the combustion chamber for the first gas discharge amount, the discharge amount adjusting unit being capable of individually adjusting the second gas discharge amount discharged through the bypass path. Is adjusted based on the detection value of the first sensor that detects at least the temperature or pressure of the heat medium, and the second gas discharge amount is adjusted based on the detection value of. 3. A first opening and a second opening that open in two directions are provided, and a gas introduced into the inside from one of the first opening and the second opening can be discharged from the other. A plurality of heat storage chambers configured to accommodate a heat storage material capable of exchanging heat with the gas introduced into the inside are juxtaposed, and communicate with the first openings of the plurality of heat storage chambers, respectively. A combustion chamber capable of combusting a gas introduced from at least one of the heat storage chambers, a supply path for supplying the gas to be treated to the heat storage chamber, an exhaust path for discharging the processed gas from the heat storage chamber, Each of the second openings of the heat storage chamber communicates with the supply passage in one or more treatment states, and communicates with the discharge passage in one or more treatment states different from the one or more treatment states, and , In each processing state, the second opening communicating with the supply path and the A communication switching unit that switches a communication partner of the second opening so that there is at least one second opening that communicates with the outlet, and the gas in the combustion chamber is discharged without passing through the heat storage chamber. A bypass means for discharging the gas in the combustion chamber through a heat exchanger that heats a heat medium for recovering exhaust heat;
A method for controlling a heat storage type exhaust gas treatment device, comprising: a bypass path; and a second bypass path for discharging gas in the combustion chamber without passing through the heat exchanger, the method comprising: The first gas discharge amount discharged through the bypass path is adjusted based on the detection value of the first sensor that detects the temperature or pressure of the heat medium, and is discharged from the combustion chamber through the second bypass path. A control method for a heat storage type exhaust gas treatment apparatus, characterized in that the second gas discharge amount is adjusted based on a detection value of at least one of the first sensor and a second sensor that detects a temperature in the combustion chamber. 4. A first opening and a second opening that open in two directions are provided, and a gas introduced into the inside from one of the first opening and the second opening can be discharged from the other. A plurality of heat storage chambers configured to accommodate a heat storage material capable of exchanging heat with the gas introduced into the inside are juxtaposed, and communicate with the first openings of the plurality of heat storage chambers, respectively. A combustion chamber capable of combusting a gas introduced from at least one of the heat storage chambers, a supply path for supplying the gas to be treated to the heat storage chamber, an exhaust path for discharging the processed gas from the heat storage chamber, Each of the second openings of the heat storage chamber communicates with the supply passage in one or more treatment states, and communicates with the discharge passage in one or more treatment states different from the one or more treatment states, and , In each processing state, the second opening communicating with the supply path and the A communication switching unit that switches a communication partner of the second opening so that there is at least one second opening that communicates with the outlet, and the gas in the combustion chamber is discharged without passing through the heat storage chamber. A bypass means for discharging the gas in the combustion chamber through a heat exchanger that heats a heat medium for recovering exhaust heat;
A method for controlling a heat storage type exhaust gas treatment device, comprising: a bypass path; and a second bypass path for discharging gas in the combustion chamber without passing through the heat exchanger, the method comprising: A second gas discharged by the bypass path is adjusted based on a detection value of a second sensor that detects a temperature in the combustion chamber, and a second gas discharged from the combustion chamber by the second bypass path. A method for controlling a heat storage type exhaust gas treatment device, characterized in that the gas discharge amount is adjusted based on at least a detection value of a first sensor that detects the temperature or pressure of the heat medium.