JP2014178065A - Regenerative combustion device and pyrolysis processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regenerative combustion device and a pyrolysis processing method capable of preventing a heat storage body from erosion by curbing consumption of auxiliary fuel through means which can be easily installed to an existing facility without requiring a huge amount of facility investment and reservation of an installation place for an additional facility.SOLUTION: A regenerative combustion device comprises: a combustion chamber 4 which burns processing object gas; an auxiliary fuel supply path 16 which introduces auxiliary fuel into the combustion chamber 4; at least a pair of heat storage chambers 3 which store heat storage bodies 12 and are communicated with the combustion chamber 4; a fan 7 which transfers the processing object gas to the combustion chamber 3; a rotary type selector valve 18 which switches transfer directions of the processing object gas to the heat storage chambers 3; an auxiliary fuel flowmeter 17 which detects consumption of auxiliary fuel in the combustion chamber 4; a discharge port thermometer 20 which detects a temperature of the processing object gas discharged from the heat storage chambers 3; and control means 21 which controls a gas transfer amount with the fan 7 on the basis of detection results of the auxiliary fuel flowmeter 17 and the discharge port thermometer 20.

Description

  The present invention relates to a regenerative combustion apparatus and a thermal decomposition treatment method for thermally decomposing and treating a gas to be treated containing a volatile organic compound (VOC) generated in various factories and research facilities.

  In factories that handle chemical products such as electrophotographic toners, synthetic resins, paints, pigments, pharmaceuticals, and industrial chemicals, volatile organic compounds (VOCs) such as ethyl acetate, toluene, xylene, and styrene are environmentally problematic. The gas to be treated containing pyrolysis is pyrolyzed. For this thermal decomposition treatment, for example, a heat storage combustion apparatus based on a heat storage type heat exchange principle is used.

  This regenerative combustion apparatus passes the gas to be treated through a preheated high-temperature heat accumulator in one side of the heat storage chamber, raises the temperature, guides it to the combustion chamber, and further raises the temperature of the combustion chamber with a burner or the like. The gas to be treated is burned and pyrolyzed. As a result, the high temperature gas to be treated is discharged through the heat storage chamber on the other side. The gas to be treated receives heat from the heat storage body in the heat storage chamber on one side and, after being processed, gives heat to the heat storage body in the heat storage chamber on the other side. By appropriately switching the heat storage chambers on the one side and the other side, the heat storage body alternately repeats heat absorption and heat release, and heat can be used efficiently. Switching between heat storage chambers includes a system using a plurality of switching valves and a system using a rotary switching valve. The method using the rotary switching valve is advantageous because it is compact and can continuously switch gases.

  In the above-described regenerative combustion apparatus, various measures are taken in order to prevent the heat storage body from being abnormally heated and melted for some reason. For example, Patent Document 1 proposes a system in which a part of the gas to be treated in the combustion chamber is introduced into a bypass duct and a heat exchanger to recover heat, and the amount of heat stored in the heat storage body is reduced. Further, in Patent Document 2, a thermometer for measuring the internal temperature of the heat storage body and the temperature of the end of the heat storage body is installed, and by controlling the suction flow rate and suction time of the combustion exhaust gas from these temperatures, Systems for controlling body temperature have been proposed. In Patent Literature 3, by installing a thermometer that measures the temperature of the gas to be processed before and after the treatment and the internal temperature of the heat storage body, by determining the movement of the fan that sucks and discharges the gas to be processed from these temperatures, A system for controlling the temperature of the heat storage body has been proposed.

  However, as described in Patent Document 1, in order to add additional equipment such as a bypass duct and a heat exchanger to the combustion chamber, it is necessary to make a great investment in equipment and secure a place for installing the additional equipment. In addition, as described in Patent Documents 2 and 3, a large amount of capital investment is required to newly install a thermometer that detects the temperature inside the heat storage body inside the heat storage body of the existing heat storage combustion device. Become.

  As a cause of abnormal temperature rise of the heat storage body, the present inventors, in the combustion chamber where the gas to be treated should be pyrolyzed when the gas to be treated such as a VOC-containing gas having a low ignition point is pyrolyzed. We focused on the occurrence of so-called intermediate combustion that would cause thermal decomposition inside the heat storage body without decomposition. When the gas to be treated is thermally decomposed inside the heat storage body, the heat generated during the thermal decomposition does not go to the combustion chamber and is excessively accumulated inside the heat storage body. A part of the heat accumulated in the heat storage body is released to the outside through the discharge passage, but when the heat storage body reaches the heat resistant temperature, the heat storage body is melted. In addition, during such intermediate combustion, the heat generated during pyrolysis is excessively stored in the heat storage body and does not go to the combustion chamber, so the LNG / city that is an auxiliary fuel in the combustion chamber despite the sufficient VOC-containing gas concentration I also noticed that there was a phenomenon that continued to consume gas.

  The present invention has been made in view of the above-mentioned problems, and the object thereof is to consume auxiliary fuel by means that can be easily introduced into existing equipment without requiring a large capital investment and securing a place for installing additional equipment. Is to provide a regenerative combustion apparatus and a thermal decomposition treatment method that can prevent melting of the heat storage body.

  In order to solve the above problems, the invention of claim 1 is directed to at least a pair of a combustion chamber for combusting the gas to be treated, fuel introduction means for introducing auxiliary fuel into the combustion chamber, and a heat accumulator that is in communication with the combustion chamber. A regenerator, a gas transfer means for transferring the gas to be processed to the heat storage chamber, and a switching means for switching the transfer direction of the gas to be processed to the heat storage chamber. Auxiliary fuel detection means for detecting consumption, a gas temperature detection means for detecting the temperature of the gas to be processed discharged from the heat storage chamber, a detection result of the auxiliary fuel detection means, and a detection result of the gas temperature detection means And a control means for controlling the amount of gas transferred by the gas moving means.

  In the present invention, intermediate combustion is determined from the consumption amount of auxiliary fuel in the combustion chamber and the temperature of the gas to be processed discharged from the heat storage chamber, and the heat loss of the heat storage body is controlled by controlling the transfer amount of the gas to be processed. Can be prevented. If it is determined that intermediate combustion is occurring, the transfer amount of the gas to be treated is increased, the heat accumulated in the heat storage body is discharged, the subsequent intermediate combustion is stopped, and the consumption of auxiliary fuel increases. It suppresses doing. In addition, when determining intermediate combustion, auxiliary fuel detection means and gas temperature detection means need only be installed outside the device, and when installing into existing equipment, a large amount of capital investment and securing of additional equipment is ensured. Do not need. As described above, in the present invention, it is not necessary to secure a large facility investment and a place for installing additional equipment, and by means that can be easily introduced into existing equipment, consumption of auxiliary fuel is suppressed, and the heat storage body is melted. There is an excellent effect that it can be prevented.

The block diagram which shows the structure of the thermal storage type combustion apparatus which concerns on this embodiment. Sectional drawing which shows a structure when the thermal storage type combustion apparatus is cut | disconnected by the A-A 'line. The partial expansion perspective view which shows the partial structure of the thermal storage body accommodated in the thermal storage chamber of the thermal storage type combustion apparatus. Sectional drawing which shows a structure when the thermal storage type combustion apparatus is cut | disconnected by the B-B 'line | wire.

  Hereinafter, an embodiment of a rotary heat storage combustion apparatus to which the present invention is applied will be described. FIG. 1 is a configuration diagram showing the configuration of a regenerative combustion apparatus. FIG. 2 is a cross-sectional view showing the configuration of the regenerative combustion apparatus shown in FIG. 1 taken along line A-A ′. FIG. 3 is a partially enlarged perspective view showing a partial configuration of the heat storage body accommodated in the heat storage chamber of the heat storage type combustion apparatus. FIG. 4 is a cross-sectional view showing a configuration when the regenerative combustion apparatus shown in FIG. 1 is cut along line B-B ′. As shown in FIGS. 1 and 2, the regenerative combustion apparatus has a gas introduction chamber 2 in which a planar shape formed in substantially the same inner diameter of the peripheral wall 1 is circular in a peripheral wall 1 formed in a substantially cylindrical shape. The heat storage chamber 3 and the combustion chamber 4 are provided concentrically.

  The gas introduction chamber 2 is disposed at the lowermost position in the peripheral wall 1 and is connected to a gas introduction path 5 into which a VOC-containing gas that is a gas to be treated before heat treatment is introduced. The gas introduction path 5 is provided with a fan 7 serving as a gas transfer means for adjusting the introduction amount of the VOC-containing gas introduced from the intake damper 6. The fan 7 can suck the atmosphere from the secondary air supply port 8 simultaneously with the suction of the VOC-containing gas, and can adjust the concentration of the VOC-containing gas. As the fan 7, a sirocco fan, a turbo fan, a propeller fan, or the like can be used.

  A heat storage chamber 3 is installed on the gas introduction chamber 2 through a perforated floor plate 9. As shown in FIG. 2, the heat storage chamber 3 is partitioned radially by a partition plate 11 to form twelve divided chambers 10. Each of the divided chambers 10 is formed in a substantially fan shape surrounded by the peripheral wall 1, the perforated floor plate 9 and the partition plate 11, and the upper surface is open to the combustion chamber 4.

  In each of the divided chambers 10, a plurality of rectangular parallelepiped-shaped heat accumulators 12 as shown in FIG. 3 are arranged on the perforated floor plate 9 from the upper surface (opening), and are stacked and stored in several stages. ing. A plurality of gas passages 13 having a square cut surface shape are formed in the heat storage body 12 so as to penetrate in the vertical direction in the drawing in parallel at equal intervals. The gas passage of the heat storage chamber 3 is configured by connecting the gas passages 13 of the plurality of heat storage bodies 12 stacked in several stages. In each divided chamber 10, a refractory caster 14 is packed in a gap between the peripheral wall 1 and the heat storage body 12.

  Since the construction is manual work, the planar dimensions and heights of the respective heat storage elements 12 are preferably 100 to 200 mm in plane dimensions and 200 to 400 mm in height from the viewpoint of ease of handling and work efficiency. A dimension of 300 mm is more preferred. The cut surface dimensions of the gas passage 13 are preferably 3 × 3 to 7 × 7 mm from the pressure loss and storage efficiency, and more preferably 5 × 5 mm with good pressure loss and heat storage efficiency. As the material of the heat storage body 12, ceramic, alumina, mullite, SiC, or the like can be used, and when the VOC-containing gas is ethyl acetate, 800 ° C. or higher is necessary for detoxification. High temperature ceramics are preferred. Similarly, ceramic, alumina, mullite, or the like can be used as the material of the refractory caster 14, and when the VOC-containing gas is ethyl acetate, 800 ° C. or higher is necessary for detoxification. High temperature ceramics are preferred.

  The combustion chamber 4 disposed above the heat storage chamber 3 communicates with the upper surface opening of the heat storage chamber 3, that is, the upper surface openings of all the divided chambers 10. The combustion chamber 4 is provided with a burner 15 for burning auxiliary fuel such as LNG and city gas, and an auxiliary fuel supply passage for supplying auxiliary fuel to the burner 15. Thereby, as will be described later, the combustion chamber 4 pyrolyzes the gas to be treated supplied from one heat storage chamber 3 with or without using a burner, and the gas after the pyrolysis treatment is treated with the other gas. The heat storage chamber 3 is discharged. The auxiliary fuel supply passage 16 is provided with an auxiliary fuel flow meter 17 as auxiliary fuel detecting means for detecting the amount of auxiliary fuel consumed in the combustion chamber 4. The auxiliary fuel flow meter 17 may be a flow meter such as a vortex type, an ultrasonic type, a differential pressure type, or an area type.

  Further, as shown in FIG. 1, a rotary switching valve 18 serving as switching means is provided below the heat storage chamber 3 so as to be concentric with the central axis of the cylindrical heat storage chamber 3. The rotary switching valve 18 is arranged inside the gas introduction chamber 2, the upper end is overlapped with a part of the perforated floor plate 9, and the lower end is connected to a discharge passage 19 projecting outside the gas introduction chamber 2. As shown in FIG. 4, a suction port 18a, a closing plate 18b, a discharge port 18c, and a purified gas port 18d are provided at the upper end of the rotary switching valve 18 in order in the circumferential direction. The suction port 18a communicates the gas introduction chamber 2 with the five divided chambers 10 that are less than half. The discharge port 18c communicates the discharge chamber 19 with the five divided chambers 10 that are less than half. The closing plate 18b closes one divided chamber 10. The purified gas port 18d allows the gas introduction path 5 and the one divided chamber 10 to communicate with each other.

  The rotary switching valve 18 is configured to rotate by 150 ° (an angle corresponding to five divided chambers) every predetermined time by a device (not shown). Thereby, the heat storage body 12 of each divided chamber 10 in the heat storage chamber 3 sequentially repeats the heat release time, the purification time, the heat reception time, and the pause time for each rotation of the rotary switching valve 18. The heat storage body 12 in the heat release timing is heated (heat radiation) to lower the temperature by heating the VOC-containing gas before the pyrolysis treatment that rises through the gas passage 13 via the suction port 18a. When the heat storage body 12 in the purification time is switched from the heat radiation time to the heat reception time, the VOC-containing gas remaining in the heat storage chamber 3 without reaching the combustion chamber 4 is passed through the gas purification path 18d (fan 7). It is purified by returning to the side. The heat storage body 12 in the heat receiving time is heated by the high-temperature gas after the thermal decomposition process that moves down the gas passage 13 (heat receiving) and the temperature rises. The heat storage body 12 in the rest period is in a state of being closed by the closing plate 18b. The heat release time for heating the gas before the pyrolysis treatment and the heat receiving time for recovering the heat of the gas after the pyrolysis treatment are several times longer than the purification time and the suspension time, respectively.

  A discharge passage 19 connected to the lower end of the rotary switching valve 18 is provided with a discharge port thermometer 20 serving as a discharge gas temperature detecting means for constantly detecting the temperature of the gas after the pyrolysis process that passes through the discharge passage 19. The The outlet thermometer 20 can be a thermocouple, a side temperature resistor, or the like.

  In the regenerative combustion apparatus according to the present embodiment, the air volume of the fan 7 for introducing gas into the gas introduction chamber 2 based on the detection results of the auxiliary fuel flow meter 24 and the discharge port thermometer 20 as will be described later. Control means 21 for controlling is installed.

  The regenerative combustion apparatus having the above-described configuration is operated as follows. First, the VOC-containing gas before the heat treatment decomposition is introduced into the gas introduction chamber 2 from the gas introduction path 5 and passes through the suction chamber 18 and the divided chamber 10 which is located on one side of the heat storage chamber 3 and is in a little less than half heat release period. It flows into the combustion chamber 4. The VOC-containing gas before the pyrolysis treatment passes through the gas passage 13 of the heat storage body 12 that has previously received heat and becomes high temperature, and receives heat from the high-temperature heat storage body 12 in a state where the temperature has increased. It flows into the combustion chamber 4. The VOC-containing gas flowing into the combustion chamber 4 is burned and decomposed, with or without being heated by the burner 15. For example, when the VOC-containing gas is an ethyl acetate-containing gas, the combustion chamber 4 is always adjusted to be 800 ° C. or higher (50 to 90% of the heat resistant temperature of the ceramic heat storage body) in order to render it harmless. Is done. The pyrolyzed gas flows out of the combustion chamber 4 and is discharged into the discharge passage 19 through the divided chamber 10 located on the other side of the heat storage chamber 3 and corresponding to the heat receiving timing of less than half and the discharge port 18c of the rotary switching valve 18. Is done. The high-temperature gas after the thermal decomposition process passes through the gas passage 13 of the heat storage body 12 that has previously been radiated and cooled to the lower side, radiates heat to the low-temperature heat storage body 12, and the temperature is lowered. It is discharged.

  Then, after a predetermined time has elapsed, the rotary switching valve 18 rotates by 150 °, the divided chamber 10 corresponding to the heat release time is switched to the divided chamber 10 corresponding to the heat absorption time through the purification time, and the division chamber 10 corresponding to the heat absorption time is set to the rest time. After that, it is switched to the heat release time. In this manner, the heat storage body 12 in the divided chamber 10 performs the thermal decomposition treatment of the VOC-containing gas while alternately repeating heat dissipation.

  However, if a low ignition point VOC-containing gas (for example, ethyl acetate-containing gas) is thermally decomposed at a low air volume, it should be decomposed in the combustion chamber 4 originally, but the ignition point is low so that it passes through the heat storage body 12. So-called intermediate combustion, in which pyrolysis occurs, may occur. When the VOC-containing gas is thermally decomposed inside the heat storage body, the heat generated during the heat decomposition does not go to the combustion chamber 4 but accumulates inside the heat storage body 12. A part of the heat accumulated in the heat storage body 12 is released to the outside through the discharge passage 19, but the heat storage body 12 is melted when the heat resistance temperature of the heat storage body 12 is reached. In addition, during such intermediate combustion, heat does not flow to the combustion chamber 4, so that the auxiliary fuel is continuously consumed in the combustion chamber 4 regardless of the sufficient VOC-containing gas concentration. Therefore, the regenerative combustion apparatus according to the present embodiment constantly monitors the temperature of the discharge port thermometer 20 attached to the discharge passage 19 and the detection result of the auxiliary fuel flow meter 24 in order to avoid melting of the heat storage body 12. Control means 21 is provided.

  The control means 21 detects when the outlet thermometer 20 detects 20% of the heat-resistant temperature of the heat storage body 12 (220 ° C. in the case of a ceramic heat storage body) and further detects the use of auxiliary fuel by the auxiliary fuel flow meter 24. Automatically determines intermediate combustion. If it is determined that the combustion is intermediate, the rotational speed of the fan 7 is increased, the amount of atmospheric suction is increased from the secondary air supply port 8, and the gas concentration of the VOC-containing gas is decreased. Thereby, the heat of the heat storage body is forcibly released to the outside. And the control means 21 monitors discharge | release of the calorie | heat amount accumulated in the thermal storage body 12 with the discharge port thermometer 20, and the detection result of the discharge port thermometer 20 became 20% or less of the heat-resistant temperature of the thermal storage body 12. At the time, control for reducing the rotational speed of the fan 7 is started. Thereafter, the regenerative combustion apparatus becomes a normal operation. When the air flow rate of the fan 7 is being reduced or during normal operation, the outlet thermometer 20 detects 20% of the heat-resistant temperature of the heat storage body 12, and the auxiliary fuel flow meter 24 detects the use of auxiliary fuel. In this case, it is determined that the intermediate combustion is performed again, and the rotational speed of the fan 7 is increased again. Even if the outlet thermometer 20 detects 20% of the heat-resistant temperature of the heat storage body 12, if the use of auxiliary fuel is not detected (zero auxiliary fuel consumption), the cause of the temperature rise is determined to be intermediate combustion. Without determining that the VOC-containing gas is thermally decomposed in the combustion chamber 4, the normal operation is continued.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated concretely, this invention is not limited only to these Examples. In this embodiment, an ethyl acetate-containing gas is used as a gas to be processed.

[Example 1]
The pyrolysis process of the ethyl acetate containing gas was performed using the thermal storage type combustion apparatus (product made from Takuma Corporation; RL-15). At this time, the gas concentration of the ethyl acetate-containing gas introduced into the gas introduction chamber is 7% LEL, and the air volume of the fan is 150 Nm ³ / min. As can be seen from the results shown in Table 1 below, the exhaust port temperature tends to increase with time, and it is considered that intermediate combustion has occurred inside the heat storage body. Therefore, the control means controls the air flow to 400 Nm3 / min by adjusting the opening of the intake damper when the discharge port temperature by the discharge port thermometer is 220 ° C. and the use of the auxiliary fuel is detected by the auxiliary fuel flow meter. went. Thereby, it can confirm that the heat | fever accumulate | stored inside the thermal storage body is discharge | released at an exhaust port, and the consumption of auxiliary fuel reduced.

[Example 2]
Using the regenerative combustion apparatus described in Example 1, the ethyl acetate-containing gas was pyrolyzed by setting the gas concentration of the ethyl acetate-containing gas to 7% LEL and the air volume of the fan to 150 Nm ³ / min. As can be seen from the results shown in Table 2 below, the exhaust port temperature tends to increase with time, and it is considered that intermediate combustion has occurred inside the heat storage body. Therefore, the control means performs control to increase the air volume to 400 Nm3 / min by controlling the rotational speed of the fan when the outlet temperature by the outlet thermometer is 220 ° C. and the use of auxiliary fuel is detected by the auxiliary fuel flow meter. went. Thereby, it can confirm that the heat | fever accumulate | stored inside the thermal storage body is discharge | released at an exhaust port, and the consumption of auxiliary fuel reduced.

[Comparative Example 1]
Under the operating conditions described in Example 1, a pyrolysis treatment experiment of an ethyl acetate-containing gas was performed without controlling the fan air volume. As can be seen from the results shown in Table 3 below, as the time elapses, the outlet temperature tends to rise, and intermediate combustion occurs inside the heat accumulator after 40 hours. By continuing the experiment, it was determined that the outlet temperature further increased and there was a risk of melting of the heat storage body, so the experiment was forcibly terminated when the outlet temperature reached 220 ° C. or higher.

[Comparative Example 2]
Using the regenerative combustion apparatus described in Example 1, the gas concentration of the ethyl acetate-containing gas is 12% LEL, the fan air volume is 150 Nm ³ / min, and the ethyl acetate-containing gas is thermally decomposed without controlling the fan air volume. Processed. As can be seen from the results shown in Table 4 below, as the time elapses, the outlet temperature tends to increase, and intermediate combustion occurs inside the heat storage body 30 hours later. By continuing the experiment, it was determined that the outlet temperature further increased and there was a risk of melting of the heat storage body, so the experiment was forcibly terminated when the outlet temperature reached 220 ° C. or higher.

[Comparative Example 3]
Using the regenerative combustion apparatus described in Example 1, the gas concentration of the ethyl acetate-containing gas is 4% LEL, the fan air volume is 150 Nm ³ / min, and the ethyl acetate-containing gas is thermally decomposed without controlling the fan air volume. Processed. As can be seen from the results shown in Table 5 below, with the passage of time, the outlet temperature increased, and intermediate combustion occurred inside the heat storage body 60 hours later. By continuing the experiment, it was determined that the outlet temperature further increased and there was a risk of melting of the heat storage body. Therefore, the experiment was forcibly terminated when the outlet temperature reached 220 ° C. or higher.

Table 6 summarizes the results of the above-described Examples and Comparative Examples. As can be seen from the results shown in Table 6, the temperature rise at the outlet and the presence or absence of auxiliary fuel are monitored, and if it is determined that intermediate combustion has occurred, the continuation of intermediate combustion is prevented by controlling the air volume of the fan. it can. Thereby, the melting loss of a thermal storage body can be prevented and reduction of auxiliary fuel can be aimed at. It can also be seen that it is desirable to select fan speed control with low power consumption for controlling the fan air volume.

What has been described above is merely an example, and the present invention has a specific effect for each of the following modes.
(Aspect A)
A combustion chamber such as the combustion chamber 4 for burning the gas to be treated, fuel introduction means such as the auxiliary fuel supply passage 16 for introducing auxiliary fuel into the combustion chamber, and a heat storage body such as the heat storage body 12 are accommodated and communicated with the combustion chamber. At least a pair of heat storage chambers 3, a gas transfer means such as a fan 7 that transfers a gas to be processed to the heat storage chamber, and a switching means such as a rotary switching valve 18 that switches the transfer direction of the gas to be processed to the heat storage chamber. In the heat storage type combustion apparatus, auxiliary fuel detection means such as an auxiliary fuel flow meter 17 for detecting the consumption amount of auxiliary fuel in the combustion chamber, and an outlet temperature for detecting the temperature of the gas to be processed discharged from the heat storage chamber. Gas temperature detection means such as a total of 20 and control means such as control means 21 for controlling the gas transfer amount by the gas transfer means from the detection result of the auxiliary fuel detection means and the detection result of the gas temperature detection means.
According to this, as described in the above embodiment, the consumption of auxiliary fuel is suppressed by means that can be easily introduced into existing equipment without requiring large capital investment and securing the installation location of additional equipment, and heat storage. Body melting can be prevented.
(Aspect B)
In the regenerative combustion apparatus of (Aspect A), the control means controls the transfer amount of the gas to be processed by controlling the rotation speed of the gas transfer means.
According to this, as described in the above embodiment, by adjusting the air volume by controlling the rotation speed of the gas transfer means such as a fan, compared with the case where the air volume is adjusted using the air volume adjusting means such as a damper. , Power consumption can be suppressed.
(Aspect C)
The preheating process in which the gas to be treated is preheated by the heat stored in one heat storage body, the combustion process in which the pretreated gas to be burned is combusted in the combustion chamber, and the heat of the gas to be treated pyrolyzed in the combustion chamber. A heat recovery process for recovering and storing heat with the other heat storage body, and in the thermal decomposition treatment method in which the remaining heat process and the recovery process in the heat storage chamber are alternately repeated, the consumption amount of auxiliary fuel consumed in the combustion stroke, The amount of gas transferred to the heat storage body is controlled based on the temperature of the gas to be processed discharged in the heat recovery process.
According to this, as described in the above embodiment, the consumption of auxiliary fuel is suppressed by means that can be easily introduced into existing equipment without requiring large capital investment and securing the installation location of additional equipment, and heat storage. Body melting can be prevented.

DESCRIPTION OF SYMBOLS 1 Perimeter wall 2 Gas introduction chamber 3 Thermal storage chamber 4 Combustion chamber 5 Gas introduction path 6 Intake damper 7 Fan 8 Secondary air supply port 9 Perforated floor board 10 Partition room 11 Partition plate 12 Heat storage body 13 Gas passage 14 Refractory caster 15 Burner 16 Auxiliary fuel supply path 18 Rotary switching valve 17 Auxiliary fuel flow meter 18 Rotary switching valve 19 Discharge port thermometer 20 Control means

JP 2002-115836 A JP-A-9-159150 JP 2009-250509 A

Claims (3)

A combustion chamber for burning the gas to be treated; fuel introducing means for introducing auxiliary fuel into the combustion chamber; at least a pair of heat storage chambers that contain the heat storage body and communicate with the combustion chamber; and transfer the gas to be treated to the heat storage chamber In the regenerative combustion apparatus comprising gas transfer means and switching means for switching the transfer direction of the gas to be processed to the heat storage chamber,
Auxiliary fuel detection means for detecting consumption of auxiliary fuel in the combustion chamber, a gas temperature detection means for detecting the temperature of the gas to be processed discharged from the heat storage chamber, a detection result of the auxiliary fuel detection means, and the A regenerative combustion apparatus comprising: control means for controlling a gas transfer amount by the gas moving means based on a detection result of the gas temperature detecting means. The regenerative combustion apparatus of claim 1,
The regenerative combustion apparatus according to claim 1, wherein the control means controls a gas transfer amount by controlling a rotation speed of the gas transfer means. A preheating process in which the gas to be processed is preheated by heat stored in one heat storage body, a combustion process in which the preheated gas to be processed is burned in the combustion chamber,
In a thermal decomposition processing method comprising: a heat recovery process for recovering and storing heat of a gas to be processed pyrolyzed in a combustion chamber with the other heat storage body, and alternately repeating a residual heat process and a recovery process in the heat storage chamber ,
A pyrolysis processing method characterized by controlling the amount of gas transferred to the heat storage body from the consumption of auxiliary fuel consumed in the combustion stroke and the temperature of the gas to be treated discharged in the heat recovery stroke. .

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