JP2011133131A - Method of cleaning operation of heat storage type gas treatment device and heat storage type gas treatment device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively remove a harmful substance (s) attached to a gas passage of each section of the device in a gas treatment operation for leading out a treated gas G' to a gas discharge passage 5 by allowing a treated gas G from a gas supply passage 4 to pass through an inlet-side heat storage chamber 10A, a combustion chamber 8, and an outlet-side heat storage chamber 10B. <P>SOLUTION: A heater 7 for combustion, of the combustion chamber 8 is operated for heating in a state that delivery of the treated gas G from a treated gas generation source 2 to the gas supply passage 4 is stopped, and in this state, a cleaning gas G" is circulated to a device body section 1a through an air return passage 20 branched from the gas discharge passage 5 and connected to the gas supply passage 4, and a part of the circulated cleaning gas G" guided by the air return passage 20 is circulated to the gas supply passage 4 through a cross-over passage 21 crossing over a downstream-side part and an upstream-side part of the gas supply passage 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is a heat storage type for detoxification treatment such as deodorizing treatment by oxidizing and decomposing harmful substances contained in the gas to be treated using gases containing harmful substances such as solvent vapor generated in various factories. The present invention relates to a gas processing device cleaning operation method and a heat storage gas processing device suitable for carrying out the cleaning operation method.

  More specifically, a combustion chamber provided with a combustion heater and a plurality of heat storage chambers containing a breathable heat storage material layer are provided, and one end side of each of the heat storage chambers is connected in parallel to the combustion chamber. The other end side of each of the heat storage chambers is connected in parallel to the switching valve device, and this switching valve device has a part of the plurality of heat storage chambers as an inlet side heat storage chamber, and another part of the heat storage chambers. Using the heat storage chamber as the outlet-side heat storage chamber, the gas to be processed supplied from the gas supply passage is passed through the inlet-side heat storage chamber, combustion chamber, and outlet-side heat storage chamber in that order to detoxify the harmful substances in the gas to be processed. Then, in the gas processing operation for deriving the treated gas to the gas discharge path, heat storage configured to sequentially switch the heat storage chamber as the inlet side heat storage chamber and the heat storage chamber as the outlet side heat storage chamber among the plurality of heat storage chambers Operation method of the gas type gas processing apparatus and its cleaning operation Law Concerning suitable regenerative gas treatment apparatus for carrying out the.

  In this type of heat storage type gas processing apparatus, among the plurality of heat storage chambers, the gas processing operation (that is, the inlet side) is performed while sequentially switching the heat storage chamber as the inlet side heat storage chamber and the heat storage chamber as the outlet side heat storage chamber by the switching valve device. Detoxification operation in which the toxic substances contained in the gas to be treated led to the combustion chamber through the heat storage chamber are oxidized and decomposed in the combustion chamber). It adheres to and accumulates in the gas paths (particularly where the temperature of the gas to be treated drops) of each part of the apparatus such as the heat storage chamber and the switching valve device.

  In addition, since the deposition of such harmful substances can cause performance degradation and operational troubles, it is necessary to remove these adhered harmful substances in a timely manner. As a cleaning operation to remove, while heating the combustion heater in the combustion chamber, the high temperature processed gas led to the gas discharge path is used as a cleaning gas in the apparatus main body provided with the combustion chamber, the heat storage chamber, and the switching valve device. The so-called “empty baking” in which the adhering harmful substances are evaporated and removed by circulation of the high-temperature treated gas (cleaning gas) is periodically performed (see Patent Document 1).

JP 2002-303415 A

  However, in the above-described conventional cleaning operation (empty baking), although harmful substances attached to the gas path of the main body of the apparatus such as a heat storage chamber and a switching valve device can be removed, the external passage is generally performed in the long gas supply path. Condensable harmful substances in the gas to be treated attached to the inner surface of the gas supply path or the fan or valve device installed in the gas supply path due to heat radiation to the gas cannot be removed, which causes deterioration in the performance of the equipment or operational troubles. There is still a problem that cannot be sufficiently prevented.

  In order to avoid this problem, the gas supply path is equipped with an adhesion prevention heater that heats (reheats) the gas to be processed that passes through the gas supply path, or the inside of the gas supply path is manually operated periodically. However, when a heater for preventing adhesion is installed, there is a problem that the equipment cost and the operating cost are high due to the heater facility, and it is disadvantageous in terms of energy saving. Arise.

  Further, when the inside of the gas supply path is manually cleaned, it takes a long time for the cleaning operation, and therefore it is necessary to suspend the factory operation that requires the detoxification treatment of the gas to be processed for a long time. Problems arise.

  In view of this situation, the main problem of the present invention is to provide a cleaning operation method for a regenerative gas processing apparatus that can effectively solve the above problems, and a regenerative gas treatment suitable for implementing the cleaning operation method. The point is to provide a device.

The first characteristic configuration of the present invention relates to a cleaning operation method of a regenerative gas processing apparatus,
A combustion chamber provided with a heater for combustion, and a plurality of heat storage chambers containing a breathable heat storage material layer are provided, and one end side of each of the heat storage chambers is connected in parallel to the combustion chamber, and each of the heat storage chambers The other end side of the
In this switching valve device, a part of the plurality of heat storage chambers is used as an inlet side heat storage chamber, and the other part of the heat storage chamber is used as an outlet side heat storage chamber. A gas processing operation for detoxifying harmful substances in the gas to be processed by passing the processing gas through the inlet-side heat storage chamber, the combustion chamber, and the outlet-side heat storage chamber in that order, and leading the processed gas to the gas discharge passage In the cleaning operation method of the regenerative gas treatment device, which is configured to sequentially switch the heat storage chamber as the inlet side heat storage chamber and the heat storage chamber as the outlet side heat storage chamber among the plurality of heat storage chambers,
As a cleaning operation to remove harmful substances attached to the gas path of each part of the apparatus in the gas processing operation,
Heating the combustion heater in a state where the supply of the gas to be processed from the gas source to be processed to the gas supply path is stopped,
In this state, the main body side that circulates the cleaning gas through the return air passage branched from the gas discharge passage and connected to the gas supply passage to the main body portion including the combustion chamber, the heat storage chamber, and the switching valve device In addition to circulating cleaning gas,
Along with the cleaning gas circulation on the main body side, in the middle of the circulation path of the cleaning gas circulation on the main body side, a part of the circulating cleaning gas guided by the return air passage is connected to the downstream portion and the upstream side of the gas supply passage. The cleaning gas is circulated on the supply path side to be circulated with respect to the gas supply path through a transfer path extending to the portion.

  That is, in this configuration, the cleaning gas is circulated to the main body of the apparatus through the return air passage in the cleaning gas circulation on the main body side, and the circulated cleaning gas is adhered to harmful substances by the combustion heater in the process of passing through the combustion chamber. Heat to a temperature suitable for removal.

  And by circulating the cleaning gas heated in this way to the device main body through the return air passage as the main body side cleaning gas circulation, harmful substances attached to the gas passage of the device main body such as the heat storage chamber and the switching valve device are removed. Remove by evaporation.

  In parallel with the cleaning gas circulation on the main body side, a part of the heated circulating cleaning gas guided by the return air passage is used as the cleaning gas circulation on the supply passage side in the course of the cleaning gas circulation on the main body side. By circulating to the gas supply path through the transfer path, harmful substances adhering to the inner surface of the gas supply path and the fans and valve devices installed in the gas supply path are also evaporated and removed.

  Here, since the cleaning gas circulation on the supply path side is performed in the middle of the circulation path of the cleaning gas circulation on the main body side, harmful substances that have been included in the circulating cleaning gas due to the removal of adhered harmful substances by the cleaning gas circulation on the supply path side are also included. In addition to the harmful substances that have been included in the circulating cleaning gas by the removal of adhering harmful substances by the cleaning gas circulation on the main body side, it is rendered harmless by oxidative decomposition by heating with the combustion heater in the process of passing the circulating cleaning gas through the combustion chamber can do.

  In other words, according to this configuration, harmful substances adhering to the gas path of the apparatus main body such as the heat storage chamber and the switching valve device are also circulated in the inside of the gas supply path and the fans and valve devices equipped in the gas supply path. It can be effectively removed by the cleaning gas, which eliminates the need to install a heater for preventing adhesion to the gas supply path and manual cleaning of the inside of the gas supply path, while preventing harmful substances from adhering to the main body of the device. It is possible to prevent the performance degradation and operation trouble of the equipment caused by the harmful substances adhering to the gas supply path, as well as the performance degradation of the equipment and the operation trouble.

  By the way, in order to remove the harmful substances attached to the gas supply path as well as the attached harmful substances on the main body of the equipment such as the heat storage chamber and the switching valve device, as another method, heating is conducted from the gas discharge path through the return air path. The entire amount of the circulating cleaning gas is returned to the upstream side of the gas supply path, and the circulating cleaning gas is temporarily passed from the upstream side to the downstream side of the gas supply path. On the other hand, it is possible to circulate by passing in that order.

  In contrast, in the above configuration, another cleaning gas circulation circulation system on the supply path side is formed in the cleaning gas circulation circulation system on the main body side, and the cleaning gas circulation on the supply path side is passed through the return air path. A part of the heated circulating cleaning gas that is guided is circulated to the gas supply path through a transfer path that extends between the downstream part and the upstream part of the gas supply path, and on the other hand, as a cleaning gas circulation on the main body side For the main body, the circulating cleaning gas discharged from the circulation system of the cleaning gas circulation on the supply path side and the heated circulating cleaning gas from the return air path along with the partial introduction of the circulating cleaning gas from the return air path Supply channel side that removes adhering harmful substances from a gas supply channel that is generally longer than the above-mentioned alternative method in which the circulating cleaning gas is temporarily passed through the gas supply channel because the remaining part is joined and circulated. Further improve the cleaning function Bets can be, performance degradation or operating troubles apparatus due to adhesion harmful substances of the gas supply path can be more effectively and reliably prevented.

The second characteristic configuration of the present invention specifies an embodiment suitable for the implementation of the cleaning operation method according to the first characteristic configuration,
Prior to parallel execution of the cleaning gas circulation on the main body side and the cleaning gas circulation on the supply path side, the cleaning gas circulation on the main body side is performed alone,
The point is that the temperature of the circulating cleaning gas is raised in advance to a temperature suitable for the cleaning operation by performing the cleaning gas circulation on the main body side alone.

  That is, according to this structure, in the single implementation of the cleaning gas circulation on the main body side, the circulation cleaning is performed by heating the circulating cleaning gas by the combustion heater in the combustion chamber (in some cases, heating by the heat storage material layer in the heat storage state is also used). The gas temperature is raised in advance to a temperature suitable for the cleaning operation prior to the concurrent execution of the cleaning gas circulation on the main body side and the cleaning gas circulation on the supply path side, so the cleaning gas circulation on the main body side and the supply path side from the beginning of the cleaning operation Compared with raising the temperature of the circulating cleaning gas to a temperature suitable for the cleaning operation by carrying out the parallel with the cleaning gas circulation, the circulating cleaning gas can be heated more efficiently and efficiently. As a whole, it can be performed more efficiently and efficiently.

  In the implementation of the first or second characteristic configuration, as the cleaning gas, the residual gas in the gas path after the end of the gas processing operation or the outside air taken in from the outside as the cleaning gas after the end of the gas processing operation is taken in. Any gas may be used.

  Further, in the cleaning operation, it is desirable to adjust the circulating air volume of the cleaning gas to an air volume suitable for the cleaning operation, for example, by setting the circulating air volume of the cleaning gas to be smaller than the supply air volume of the gas to be processed during the gas processing operation.

  During the cleaning operation, adjustment of the heating output of the combustion heater in the combustion chamber, introduction of a short-circuited high-temperature cleaning gas from the combustion chamber to the return air path, or the circulation cleaning gas as necessary. It is desirable to keep the temperature of the circulating cleaning gas at a temperature suitable for the cleaning operation by mixing cooling gas such as outside air.

  It is desirable that the temperature adjustment of the circulating cleaning gas is automatically executed by the control means based on the detected temperature of the circulating cleaning gas.

  Also, in the cleaning operation, it is desirable to perform switching between the inlet side heat storage chamber and the outlet side heat storage chamber by the switching valve device so that the cleaning operation is reliably and evenly performed for each of the plurality of heat storage chambers. .

The third characteristic configuration of the present invention relates to a regenerative gas processing apparatus,
A combustion chamber provided with a heater for combustion, and a plurality of heat storage chambers containing a breathable heat storage material layer are provided, and one end side of each of the heat storage chambers is connected in parallel to the combustion chamber, and each of the heat storage chambers The other end side of the
In this switching valve device, a part of the plurality of heat storage chambers is used as an inlet side heat storage chamber, and the other part of the heat storage chamber is used as an outlet side heat storage chamber. A gas processing operation for detoxifying harmful substances in the gas to be processed by passing the processing gas through the inlet-side heat storage chamber, the combustion chamber, and the outlet-side heat storage chamber in that order, and leading the processed gas to the gas discharge passage In the heat storage type gas treatment device, which is configured to sequentially switch the heat storage chamber as the inlet side heat storage chamber and the heat storage chamber as the outlet side heat storage chamber among the plurality of heat storage chambers,
While connecting the return air passage for cleaning operation branched from the gas discharge passage to a portion on the upstream side of the gas supply fan in the gas supply passage,
A portion of the gas supply path that is separated from the downstream portion of the gas supply fan at a location where the gas supply fan is interposed, and that is located upstream of the connection portion of the return air path in the gas supply path. Connected to
An opening / closing valve device for the return air passage and the passage for opening and closing each of the return air passage and the passage is provided.

  In other words, according to this configuration, during the gas treatment operation (see FIG. 1), the cleaning operation return air passage 20 branched from the gas discharge passage 5 and the gas supply fan 6 in the gas supply passage 4 than the intervening portion. The gas supply fan 6 passes the gas G to be treated through the gas supply path 4 by closing the cleaning operation transfer paths 21 branched from the downstream portion by the return air and transfer path opening / closing devices 20a and 21a. The harmful substance s contained in the gas G to be treated is oxidatively decomposed by heating by the combustion heater 7 in the combustion chamber 8 to be rendered harmless, and the treated gas G ′ is produced by the apparatus. The main body 1a can be discharged to the outside through the gas discharge path 5.

  In this gas processing operation, the retained heat of the high temperature processed gas G ′ (solid arrow) discharged from the combustion chamber 8 is stored in the heat storage material layer 9b of the outlet side heat storage chamber 10B, and then the outlet side heat storage. By switching the chamber 10B to the inlet side heat storage chamber by the switching valve device 11, the gas G to be processed (broken arrow) guided to the combustion chamber 8 through the inlet side heat storage chamber is preheated by the heat storage material layer 9b in the heat storage state. The heat storage in the heat storage material layer 9b and the preheating of the gas G to be processed by the heat storage material layer 9b can be continued by switching the inlet side heat storage chamber and the outlet side heat storage chamber by the switching valve device 11.

  On the other hand, in the cleaning operation (see FIG. 3), the apparatus main body is opened by opening the return air passage 20 in a state where the supply of the gas G to be processed from the gas generation source 2 to the gas supply passage 4 is stopped. The cleaning gas G ″ sent from 1a to the gas discharge path 5 is guided to the upstream side of the gas supply fan 6 in the gas supply path 4 by suction by the gas supply fan 6 through the return air path 20, and the cleaning gas G ”Is supplied to the apparatus main body 1 a by blowing air from the gas supply fan 6, and thereby the apparatus main body including the combustion chamber 8, the heat storage chambers 10 </ b> A and 10 </ b> B, and the switching valve device 11 as the cleaning gas circulation of the main body side. It can circulate with respect to the part 1a.

  In the cleaning gas circulation on the main body side, the circulating cleaning gas G ″ is heated to a temperature suitable for removing harmful substances by the combustion heater 7 in the process of passing through the combustion chamber 8, and the cleaning gas G thus heated is heated. ”Is circulated to the apparatus main body 1a as a cleaning gas circulation on the main body side to evaporate and remove harmful substances attached to the gas path of the apparatus main body 1a such as the heat storage chambers 10A and 10B and the switching valve device 11. Can do.

  Further, in the cleaning operation, the gas supply path 4 is branched from the portion downstream of the gas supply fan 6 intervening portion and is separated from the connection portion of the gas supply passage 4 upstream of the connection portion of the return air passage 20. The connected transfer path 21 is also opened together with the return air path 20.

  As a result, a part of the heated circulating cleaning gas G ″ that is led from the return air passage 20 to the upstream portion of the gas supply passage 6 in the gas supply passage 4 as described above is blown by the gas supply fan 6 by the air supply passage 6. The split cleaning gas G ″ can be circulated to the gas supply path 4 through the transfer path 21 as cleaning gas circulation on the supply path side by blowing and suction by the gas supply fan 6, A part of the heated circulating cleaning gas G ″ is circulated to the gas supply path 4 through the transfer path 21 as a cleaning gas circulation on the supply path side, so that the fan provided on the inner surface of the gas supply path 4 or the gas supply path 4 is provided. And harmful substances adhering to the valve device can also be removed by evaporation.

  Further, according to this configuration, as the cleaning gas circulation on the main body side, the circulating cleaning gas discharged from the circulation system of the cleaning gas circulation on the supply path side with the partial introduction of the circulating cleaning gas G ″ from the return air path 20. G ″ and the remaining portion of the circulating cleaning gas G ″ guided from the return air passage 20 to the apparatus main body 1a are combined and circulated to the apparatus main body 1a. Hazardous substances that have been included in the circulating cleaning gas G ″ due to the removal of toxic substances, as well as hazardous substances that have been included in the circulating cleaning gas G ″ due to removal of adhered harmful substances by the cleaning gas circulation on the main body side. In the process of passing the gas G ″ through the combustion chamber, it can be rendered harmless by oxidative decomposition by heating with the combustion heater 7.

  That is, according to the above configuration, the first feature is basically achieved by using the gas supply fan 6 provided in the gas supply path 4 only by opening the return air path 20 and the transfer path 21 by the on-off valve devices 20a and 21a. The cleaning operation method by a structure can be implemented and it can be set as the thermal storage type gas processing apparatus suitable for implementation of the cleaning operation method by a 1st characteristic structure by this point.

  Even in the case where the cleaning operation is performed as described above in the regenerative gas processing apparatus according to the third characteristic configuration, the cleaning gas is the residual gas in the gas path after the end of the gas processing operation or the gas as described above. Any intake gas such as outside air taken in from the outside as the cleaning gas after the end of the treatment operation may be used.

  Further, in the cleaning operation, it is desirable to adjust the circulating air volume of the cleaning gas to an air volume suitable for the cleaning operation, for example, by setting the circulating air volume of the cleaning gas to be smaller than the supply air volume of the gas to be processed during the gas processing operation.

  Further, in the cleaning operation, it is desirable that the inlet side heat storage chamber and the outlet side heat storage chamber are switched by the switching valve device so that the cleaning operation is reliably and evenly performed for each of the plurality of heat storage chambers.

  Further, as described above, the cleaning gas circulation on the main body side is independently performed prior to the parallel execution of the cleaning gas circulation on the main body side and the cleaning gas circulation on the supply path side, and the circulation is performed by the independent execution of the cleaning gas circulation on the main body side. It is desirable to raise the temperature of the cleaning gas in advance to a temperature suitable for the cleaning operation.

  Further, in the implementation of the regenerative gas processing apparatus according to the third feature configuration, the control means for automatically switching the inlet side heat storage chamber and the outlet side heat storage chamber by operating the switching valve device in the cleaning operation, The control means for automatically performing the cleaning gas circulation on the main body side automatically based on the detected temperature of the circulating cleaning gas prior to the concurrent execution of the cleaning gas circulation of the supply channel and the cleaning gas circulation on the supply path side, or It is desirable to provide control means for automatically adjusting the temperature of the circulating cleaning gas to a temperature suitable for the cleaning operation by adjusting the heating output of the combustion heater in the combustion chamber based on the detected temperature.

The fourth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of the regenerative gas processing apparatus according to the third characteristic configuration.
A short-circuit path for short-circuiting the combustion chamber and the return air path is provided, and an on-off valve device for a short-circuit path for opening and closing the short-circuit path is provided.

  That is, according to this configuration (see FIG. 3), when the temperature of the circulating cleaning gas G ″ led to the gas supply path 4 through the return air path 20 is insufficient, the short-circuit path 23 is provided by the on-off valve device 23a for the short-circuit path. , The hottest cleaning gas G ″ in the combustion chamber 8 is introduced into the return air passage 20 in a short circuit by suction by the gas supply fan 6 in the gas supply passage 4, and the circulating cleaning gas G ″ in the return air passage 20 is introduced. By this mixing, the temperature of the circulating cleaning gas G ″ led to the gas supply path 4 through the return air path 20 can be increased, and the function of removing the adhered harmful substances can be enhanced.

  In the implementation of this configuration, the on-off valve device for the short circuit can be made a valve device capable of adjusting the passing air amount, and the air amount of the high temperature cleaning gas introduced from the combustion chamber to the return air passage through the short circuit can be adjusted. It is desirable to do so.

The fifth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of the regenerative gas processing apparatus according to the third or fourth characteristic configuration,
An outside air introduction path for taking in outside air is provided in the return air path, and an open / close valve device for the outside air introduction path for opening and closing the outside air introduction path is provided.

  That is, according to this configuration (see FIG. 3), when the temperature of the circulating cleaning gas G ″ led to the gas supply path 4 through the return air path 20 is too high, there is a risk of causing thermal damage or thermal degradation. By opening the outside air introduction passage 24 by the opening / closing valve device 24a for introduction, the outside air OA is sucked by the gas supply fan 6 in the gas supply passage 4 into the return air passage 20 as a cooling gas and circulated in the return air passage 20. It can be mixed with the cleaning gas G ″, and by this mixing, the temperature of the circulating cleaning gas G ″ guided to the gas supply path 4 through the return air path 20 can be lowered, and thermal damage and thermal deterioration can be reliably prevented. it can.

  In the implementation of this configuration, the open / close valve device for the outside air introduction passage is made a valve device capable of adjusting the passing air amount so that the air amount of the outside air taken into the return air passage through the outside air introduction passage can also be adjusted. Is desirable.

  In the implementation of the regenerative gas processing apparatus according to the fourth characteristic configuration or the fifth characteristic configuration, the on-off valve device for the short circuit or the on-off valve device for the outside air introduction passage is operated based on the detected temperature of the circulating cleaning gas. It is desirable to equip the control means for automatically introducing the high temperature cleaning gas into the return air passage through the short circuit and taking the outside air into the return air passage through the outside air introduction passage.

Device configuration diagram showing the structure of the regenerative gas processing device and the state of gas processing operation Device configuration diagram showing a single implementation state of cleaning gas circulation on the main body side in the cleaning operation Device configuration diagram showing the parallel execution state of cleaning gas circulation on the main body side and supply path side in the cleaning operation

  FIG. 1 shows a heat storage type gas processing apparatus 1 which gas-processes a gas G to be processed discharged from an exhaust fan 3 from a production line 2 (an example of a gas generation source to be processed) such as a painting factory. In operation, the gas is introduced into the apparatus main body 1a through the gas supply path 4, and toxic substance s such as solvent vapor contained in the gas G to be treated is oxidized and detoxified.

  Then, the treated gas G ′ purified by the detoxification process is discharged from the apparatus main body 1 a to the outside through the gas discharge path 5.

  A gas supply fan 6 capable of adjusting the air flow rate by inverter control or the like is provided at the downstream end of the gas supply path 4, and this gas supply fan 6 allows the object to be processed from the gas supply path 4 to the apparatus body 1 a. The gas G is introduced and the treated gas G ′ is discharged through the gas discharge path 5 from the apparatus main body 1a.

  The apparatus main body 1a of the gas processing apparatus 1 includes a combustion chamber 8 provided with a combustion burner 7 (an example of a combustion heater), and a plurality of heat storage chambers 10A and 10B containing breathable heat storage material layers 9a and 9b. And a switching valve device 11 for switching the gas path inside the apparatus main body 1a.

  Reference numeral 12 denotes a fuel passage for supplying the fuel g to the combustion burner 7, reference numeral 13 denotes an air supply passage for supplying the combustion air oa to the combustion burner 7, and the fuel passage 12 supplies the fuel g to the combustion burner 7. The fuel adjustment valve 12a for adjusting the amount is equipped, and the air supply passage 13 is equipped with a combustion air fan 13a capable of adjusting the air flow rate by inverter control or the like. The fuel adjustment valve 12a and the combustion air fan 13a The heating output of the combustion burner 7 is adjusted by the adjusting operation.

  One end side of each of the heat storage chambers 10A and 10B is connected to the combustion chamber 8 and is always in communication, and the other end side of each of the heat storage chambers 10A and 10B is connected to the switching valve device 11 respectively.

  Specifically, the switching valve device 11 has, as a valve chamber, an inlet side valve chamber 14 communicated with the other end side of each of the heat storage chambers 10A and 10B through a separate inlet side valve port 14a, and each heat storage chamber 10A. , 10B and an outlet side valve chamber 15 communicated with each other through another outlet side valve port 15a.

  Each of the inlet side valve ports 14a is equipped with an inlet side valve body 16 that opens and closes each of the inlet side valve ports 14a, and each of the outlet side valve ports 15a opens and closes each of the outlet side valve ports 15a. An outlet side valve body 17 is provided, and these valve bodies 16 and 17 are opened and closed by separate valve body actuators 18.

  The inlet side valve chamber 14 is connected to the downstream end of the gas supply path 4, and the outlet side valve chamber 15 is connected to the upstream end of the gas discharge path 5.

  That is, in this gas processing apparatus 1, as shown by the solid line arrows in FIG. 1, a part of the plurality of heat storage chambers 10A, 10B is used as an inlet side heat storage chamber, and an inlet side valve of the inlet side heat storage chamber 10A is used. The outlet 14a is opened and the outlet valve 15a is closed.

  Further, another part of the heat storage chamber 10B is set as an outlet side heat storage chamber, and the inlet side valve port 14a in the outlet side heat storage chamber 10B is closed and the outlet side valve port 15a is opened.

  As a result, the gas G to be treated supplied from the gas supply path 4 to the inlet side valve chamber 14 is passed through the inlet side heat storage chamber 10A, the combustion chamber 8, and the outlet side heat storage chamber 10B in that order, and combustion occurs in this gas passage. In the process of passing through the chamber 8, harmful substances s such as solvent vapor contained in the gas G to be treated are oxidatively decomposed by heating (combustion) by the combustion burner 7 and rendered harmless.

  Further, by passing the high temperature processed gas G ′ discharged from the combustion chamber 8 (that is, the gas to be processed G in which the contained harmful substance s has been rendered harmless) through the heat storage material layer 9b of the outlet side heat storage chamber 10B, High temperature heat held by the high temperature processed gas G ′ is stored in the heat storage material layer 9b of the outlet side heat storage tank 10B, and subsequently, the processed gas G ′ is discharged to the gas discharge path 5 through the outlet side valve chamber 15. .

  And after continuing this process only for the predetermined time, in the next process, as shown by the arrow of the broken line in Drawing 1, heat storage room 10A used as the inlet side heat storage room in the previous process is made into the outlet side heat storage room, and the outlet side heat storage room The inlet side valve port 14a in 10B is closed and the outlet side valve port 15a is opened, and the heat storage chamber 10B, which is the outlet side heat storage chamber in the previous step, is used as the inlet side heat storage chamber. The inlet side valve port 14a is opened and the outlet side valve port 15a is closed.

  Thereby, the process to be processed G supplied from the gas supply path 4 to the inlet side valve chamber 14 is exchanged with the inlet side heat storage chamber 10B in the state where the inlet side heat storage chamber and the outlet side heat storage chamber are switched. Passing through the chamber 8 and the outlet-side heat storage chamber 10A in that order, and in this gas passage, in the passage process of the combustion chamber 8, the harmful substance s such as solvent vapor contained in the gas G to be treated is burned in the same manner as the previous step. It is detoxified by oxidative decomposition by heating (combustion) by the burner 7 for use.

  Further, by passing the gas G to be treated leading to the combustion chamber 8 through the heat storage material layer 9b of the inlet side heat storage chamber 10B that has stored heat in the previous step, the amount of heat stored in the heat storage material layer 9b is introduced into the combustion chamber 8 with the heat storage heat amount. The processing gas G is preheated.

  On the other hand, the high temperature processed gas G ′ discharged from the combustion chamber 8 passes through the heat storage material layer 9a of the outlet side heat storage chamber 10A (that is, the heat storage material layer used for preheating the gas G to be processed in the previous step). As in the previous step, the high-temperature heat held by the high-temperature processed gas G ′ is stored in the heat storage material layer 9a of the outlet-side heat storage tank 10A in preparation for preheating the gas G to be processed in the next step. Subsequently, the treated gas G ′ is discharged to the gas discharge path 5 through the outlet side valve chamber 15.

  That is, in this gas treatment device 1, among the plurality of heat storage chambers 10A and 10B, the heat storage chamber to be used as the inlet side heat storage chamber and the heat storage chamber to be used as the outlet side heat storage chamber are sequentially switched by the switching valve device 11 every predetermined time. Thus, the pretreated gas G by the heat storage material layers 9a and 9b in the heat storage state and the heat storage to the heat storage material layers 9b and 9a by the processed gas G ′ can be continuously processed while continuing the heat storage to the heat storage material layers 9b and 9a. It is.

  Reference numeral 19 denotes a control device. The control device 19 opens and closes the valve bodies 16 and 17 by the valve body actuator 18 in the gas processing operation described above, so that the inlet side heat storage tank and the switching valve device 11 as described above Automatically performs sequential switching of the outlet side heat storage layer.

  Further, the control device 19 adjusts the heating output of the combustion burner 7 by adjusting the fuel regulating valve 12a and the combustion air fan 13a based on the detected room temperature of the combustion chamber 8 and the like, so that the room temperature of the combustion chamber 8 is adjusted. (That is, the processing temperature for the gas G to be processed) is automatically adjusted to the set temperature.

  In the gas treatment operation, the condensable harmful substance s contained in the gas G to be treated adheres to the gas passages of each part of the apparatus in the form of a spear or a tar. The cleaning operation for removing the harmful substance s adhering to the surface can be performed. Next, the cleaning operation will be described.

  As an additional equipment for the cleaning operation, a return air passage 20 for cleaning operation branched from the gas discharge passage 5 is connected to a portion of the gas supply passage 4 upstream of the place where the gas supply fan 6 is interposed. An opening / closing device 20a for the return air passage that opens and closes the return air passage 20 is provided.

  Further, the crossover path 21 for the cleaning operation branched from the portion downstream of the gas supply fan 6 in the gas supply passage 4 is located upstream of the connection portion of the return air passage 20 in the gas supply passage 4. Connected to a distant part (especially, an upstream part as close as possible to the generation source of the gas G to be treated) is provided, and a switching device 21 a for switching the switching channel 21 is provided.

  And the short circuit 23 and the outside air introduction path 24 which branched from the combustion chamber 8 are connected to the mixer 22 interposed in the return air path 20, and the short circuit path which opens and closes these short paths 23 and the outside air introduction path 24 Open / close valve device 23a and an open / close valve device 24a for the outside air introduction path.

  In the cleaning operation, as shown in FIG. 2, during the operation stop period of the production line 2 where the discharge of the gas G to be processed from the production line 2 to the gas supply path 4 by the exhaust fan 3 is stopped, By switching by the switching valve device 11, a part of the plurality of heat storage chambers 10A and 10B is set as an inlet side heat storage chamber, and the other part of the heat storage chamber 10B is set as an outlet side heat storage chamber. To do.

  Further, the return air passage 20 kept in the closed state in the gas processing operation is opened by the opening / closing valve device 20a for the return air passage, while the connecting passage 21 is kept in the closed state as in the gas processing operation. Thus, the gas supply fan 6 is operated in a state where the amount of air blown is lower than that during the gas processing operation, and the combustion burner 7 is heated to start the cleaning operation start-up process.

  In other words, in the start-up process of the cleaning operation, the residual gas remaining in the gas path after the gas processing operation is finished (may be an intake gas from the outside such as outside air in some cases) is used as the cleaning gas G ″. The cleaning gas G ″ is supplied to the inlet side valve chamber 14, the inlet side heat storage chamber 10 </ b> A, the combustion chamber 8, the outlet side heat storage chamber 10 </ b> B, the outlet side valve chamber 15, the gas discharge path 5, and the return air path 20. The main body side cleaning gas is circulated in order and circulated through the apparatus main body 1a. In this main body side cleaning gas operation, the circulating cleaning gas G ″ is heated by the combustion gas burner 7 to a set temperature suitable for the cleaning operation. Increase temperature.

  Next, when the temperature of the circulating cleaning gas G ″ rises to the set temperature in this start-up step, the crossover passage 21 is opened by the crossover opening / closing valve device 21a, whereby the main step of the cleaning operation is performed as shown in FIG. In parallel with the cleaning gas circulation on the main body side described above, a part of the heated circulating cleaning gas G ″ guided to the gas supply path 4 through the return air path 20 is blown by the gas supply fan 6 to the transfer path 21. The supply gas side cleaning gas is circulated through the crossover passage 21 and circulated to the gas supply passage 4 through the branch passage 21 by the diversion and the diversion cleaning gas G ″ by suction and blowing by the gas supply fan 6.

  That is, in this process of the cleaning operation, the heated cleaning gas G ″ is circulated to the apparatus main body 1a as the main body side cleaning gas circulation, so that the heat storage chambers 10A and 10B in the apparatus main body 1a in the gas processing operation The harmful substance s adhering to the switching valve device 11 is removed by evaporating with the circulating cleaning gas G ″.

  In parallel with this, the heated diverted cleaning gas G ″ is circulated to the gas supply path 4 through the crossover path 21 as a cleaning gas circulation on the supply path side, so that the inner surface of the gas supply path 4 or The harmful substance s adhering to the valve device and the fan provided in the gas supply path 4 is also removed by evaporating with the circulating cleaning gas G ″.

  Then, the cleaning gas G ″ containing the harmful substance s (steam) by the removal of the attached harmful substance by the cleaning gas circulation on the main body side, and the harmful substance s by the removal of the attached harmful substance by the cleaning gas circulation on the supply path side. The cleaning gas G ″ containing (steam) is introduced into the combustion chamber 8 through the inlet-side heat storage chamber 10A in a combined state, and the toxic substance s contained in the combined cleaning gas G ″ is burned in the combustion chamber 8 Oxidized and decomposed by heating (combustion) by the burner 7 for use.

  If this process of this cleaning operation is carried out only for a predetermined time, a heat storage chamber 10B and an outlet side heat storage chamber are formed as an inlet side heat storage chamber among the plurality of heat storage chambers 10A and 10B as shown by broken arrows in FIGS. With the heat storage chamber 10A switched, the start-up process of the cleaning operation and the subsequent process are repeated, whereby the cleaning operation in a state where all of the heat storage chambers 10A and 10B are used as the inlet-side heat storage chambers is sequentially performed. carry out.

  Even in this cleaning operation, the control device 19 performs sequential switching by the switching valve device 11 of the heat storage chamber as the inlet side heat storage chamber and the heat storage chamber as the outlet side heat storage chamber among the plurality of heat storage chambers 10A and 10B based on the set time schedule. Automatically.

  In addition, the control device 19 automatically performs the transition from the cleaning operation startup process to the present process based on the temperature of the circulating cleaning gas G ″ detected by the temperature sensor 25 provided on the outlet side of the mixer 22. To do.

  In addition, the control device 19 is based on the temperature of the circulating cleaning gas G ″ detected by the temperature sensor 25, and when the circulating cleaning gas G ″ is in a state of insufficient temperature in the start-up process of the cleaning operation or in this process, The short-circuit 23 is opened by the on-off valve device 23a for the short-circuit, whereby a part of the high temperature cleaning gas G ″ in the combustion chamber 8 is led to the mixer 22 through the short-circuit 23 and the circulating cleaning gas G in the return air path 20 is obtained. The temperature of the circulating cleaning gas G "is promoted by mixing with" "in a short circuit.

  Conversely, when the circulating cleaning gas G ″ is in an excessive temperature state during the cleaning operation start-up process or this process, the open air introduction path 24 is opened by the open / close valve device 24a for the external air introduction path. The outside air OA is guided to the mixer 22 through the introduction path 24 and mixed with the circulating cleaning gas G ″ in the return air path 20, thereby lowering the temperature of the circulating cleaning gas G ″.

[Another embodiment]
Next, another embodiment will be listed.

  The number of the heat storage chambers 10A and 10B in the heat storage gas processing apparatus 1 may be any number as long as it is a plurality of two or more rooms.

  The switching valve device 11 for sequentially switching the heat storage chambers as the heat storage chamber and the outlet side heat storage chamber among the plurality of heat storage chambers 10A and 10B is configured to open and close the plurality of valve bodies 16 and 17 as in the above-described embodiment. The valve device is not limited to switching between the inlet-side heat storage chamber and the outlet-side heat storage chamber by operation, and may be a valve device that switches between the inlet-side heat storage chamber and the outlet-side heat storage chamber by rotation of one rotary valve body.

  Moreover, you may employ | adopt the valve apparatus which switches an entrance side heat storage chamber and an exit side heat storage chamber by rotation by the side of the thermal storage chamber group which consists of several thermal storage chamber 10A, 10B depending on the case.

  The combustion heater 7 provided in the combustion chamber 8 is not limited to a burner but may be an electric heater or the like.

  In the above-described embodiment, after the cleaning gas circulation on the main body side through the return air passage 20 is performed alone in the cleaning operation, the cleaning gas circulation on the main body side through the return air passage 20 and the cleaning on the supply passage side through the crossover passage 21 are performed. Although the operation mode in which the gas circulation is performed concurrently is shown, depending on the case, the cleaning gas circulation on the main body side and the cleaning gas circulation on the supply path side may be performed concurrently from the beginning of the cleaning operation.

  The present invention can also be applied to a catalytic combustion type heat storage type gas processing apparatus in which a catalyst layer is housed in each of the heat storage chambers 10A and 10B together with the heat storage material layers 9a and 9b.

  The present invention can be applied to a gas processing apparatus used for processing a gas containing various harmful substances generated in various fields.

7 Combustion heater 8 Combustion chamber 9a, 9b Thermal storage material layer 10A, 10B Thermal storage chamber 11 Switch valve device 4 Gas supply path G Processed gas s Toxic substance G 'Processed gas 5 Gas exhaust path 2 Processed gas generation source 20 Return air path G ″ Cleaning gas 1a Device main body 21 Crossover path 6 Gas supply fan 20a Open / close valve apparatus for return path 21a Open / close valve apparatus for crossover path 23 Short circuit path 23a Open / close valve apparatus for short circuit path 24 Outside air introduction path 24a Open / close valve device for outside air introduction path

Claims (5)

A combustion chamber provided with a heater for combustion, and a plurality of heat storage chambers containing a breathable heat storage material layer are provided, and one end side of each of the heat storage chambers is connected in parallel to the combustion chamber, and each of the heat storage chambers The other end side of the
In this switching valve device, a part of the plurality of heat storage chambers is used as an inlet side heat storage chamber, and the other part of the heat storage chamber is used as an outlet side heat storage chamber. A gas processing operation for detoxifying harmful substances in the gas to be processed by passing the processing gas through the inlet-side heat storage chamber, the combustion chamber, and the outlet-side heat storage chamber in that order, and leading the processed gas to the gas discharge passage In the cleaning operation method of the regenerative gas treatment device, which is configured to sequentially switch the heat storage chamber as the inlet side heat storage chamber and the heat storage chamber as the outlet side heat storage chamber among the plurality of heat storage chambers,
As a cleaning operation to remove harmful substances attached to the gas path of each part of the apparatus in the gas processing operation,
Heating the combustion heater in a state where the supply of the gas to be processed from the gas source to be processed to the gas supply path is stopped,
In this state, the main body side that circulates the cleaning gas through the return air passage branched from the gas discharge passage and connected to the gas supply passage to the main body portion including the combustion chamber, the heat storage chamber, and the switching valve device In addition to circulating cleaning gas,
Along with the cleaning gas circulation on the main body side, in the middle of the circulation path of the cleaning gas circulation on the main body side, a part of the circulating cleaning gas guided by the return air passage is connected to the downstream portion and the upstream side of the gas supply passage. A cleaning operation method for a regenerative gas processing apparatus that performs cleaning gas circulation on a supply path side that is circulated with respect to the gas supply path through a transfer path that extends to a portion. Prior to parallel execution of the cleaning gas circulation on the main body side and the cleaning gas circulation on the supply path side, the cleaning gas circulation on the main body side is performed alone,
The cleaning operation method of the regenerative gas processing apparatus according to claim 1, wherein the temperature of the circulating cleaning gas is raised to a temperature suitable for the cleaning operation by performing the cleaning gas circulation on the main body side alone. A combustion chamber provided with a heater for combustion, and a plurality of heat storage chambers containing a breathable heat storage material layer are provided, and one end side of each of the heat storage chambers is connected in parallel to the combustion chamber, and each of the heat storage chambers The other end side of the
In this switching valve device, a part of the plurality of heat storage chambers is used as an inlet side heat storage chamber, and the other part of the heat storage chamber is used as an outlet side heat storage chamber. A gas processing operation for detoxifying harmful substances in the gas to be processed by passing the processing gas through the inlet-side heat storage chamber, the combustion chamber, and the outlet-side heat storage chamber in that order, and leading the processed gas to the gas discharge passage In the heat storage type gas treatment device, which is configured to sequentially switch the heat storage chamber as the inlet side heat storage chamber and the heat storage chamber as the outlet side heat storage chamber among the plurality of heat storage chambers,
While connecting the return air passage for cleaning operation branched from the gas discharge passage to a portion on the upstream side of the gas supply fan in the gas supply passage,
A portion of the gas supply path that is separated from the downstream portion of the gas supply fan at a location where the gas supply fan is interposed, and that is located upstream of the connection portion of the return air path in the gas supply path. Connected to
A regenerative gas processing apparatus provided with an opening / closing valve device for a return air passage and a passage for opening and closing each of the return air passage and the passage.   The regenerative gas processing apparatus according to claim 3, wherein a short-circuit path that short-circuits the combustion chamber and the return air path is provided, and an on-off valve device for a short-circuit path that opens and closes the short-circuit path is provided.   The regenerative gas processing apparatus according to claim 3 or 4, wherein an outside air introduction path for taking in outside air is provided in the return air path, and an open / close valve device for the outside air introduction path for opening and closing the outside air introduction path is provided.

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