JP3437951B2 - Combustion control system for carbonization gasifier - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly gasifies solid combustibles such as combustible industrial wastes, combustible wastes and coals by self-combustion dry distillation gas, and then completely burns the combustible gas generated at high temperature to recover energy. It is related to stable combustion control at the time of self-burning, and in a self-burning dry distillation gasification combustion device, it is possible to fully automate combustion control including fuel supply. A control function comparable to that of a combustion control device ensures safe and stable automatic operation of the solid fuel combustion device, and it also enables automatic start and automatic continuous operation control, which was not possible with conventional solid fuel combustion devices. The present invention relates to a combustion control system for a carbonization gasification and combustion device, which can achieve a large economic effect due to labor saving.

[0002]

2. Description of the Related Art Conventionally, a direct combustion method has been generally used as a combustion method for combustible solid fuel, and a part of the apparatus is partially automatically controlled or labor-saving, but the entire apparatus is There is no fully automated version of the function. A well-known technique is often found in the case of a coal combustion device. (A) Automatic coal feeder (b) Automatic coal sprinkler (c) Chien stalker combustor (d) Pulverized coal combustor These are parts of a combustion device that are automated to save labor, Unlike the heavy oil combustion boiler device and the gas-fired boiler device, it is not possible to totally automatically control the combustion device by operating only one start switch. Further, as an example of the self-burning dry distillation combustion device, the one disclosed in Japanese Patent Application No. 57-28910 is cited, but in this case, fuel is once stored in a storage tank and then fed to the top of the primary combustion chamber by a conveyor. , The fuel is moved by the transfer device provided in the primary combustion chamber, the air that is insufficient for complete combustion is introduced in the chamber for dry distillation, and the dry gas generated is introduced into the secondary combustion chamber connected to the primary combustion chamber. A method is adopted in which secondary air is added to complete combustion and heat is recovered by a subsequent waste heat boiler or heat exchanger.

[0003]

By the way, in the gas generation in the primary combustion chamber or the dry distillation gasification furnace used in the prior art, even if automatic control is performed, the physical properties of the injected fuel are coal, wood and fiber. It usually changes due to changes in types, papers, plastics, rubbers, mixtures of these, etc., and the gasification situation also changes. It is the first object of the present invention to calm the gas and operate the dry distillation gasification furnace, the secondary combustion furnace and the waste heat recovery device safely from the start to the end of the operation.

Further, in the dry combustion gasifier having the structure for depositing fuel and the primary combustion chamber used in the prior art, the phenomenon that the soot and dust accompanying the burning gas flow increases is inevitable. This causes the contamination of the subsequent device by dust, and also increases the amount of dust in the discharged combustion exhaust gas. This countermeasure is the second object of the present invention.

Further, the primary combustion chamber used in the prior art or the dry distillation gasification furnace used in the self-combustion dry distillation gasification combustion apparatus is required to limit the amount of combustion air unlike the high speed combustion in general direct combustion, Although it is described in the prior art that an oil burner for starting is provided, excess air easily enters the primary combustion chamber or the combustion start time of the dry distillation gasification furnace, which may cause a gas explosion accident or deflagration. This prevention measure is the third object of the present invention because there is a risk of a flashback phenomenon even with the minimum damage.

Further, it has been difficult to fully control the solid fuel combustion device from the past. However, the fully automatic control of the self-burning dry distillation gasification and combustion device simplifies the operation, improves safety, and saves labor. Achieving is the fourth object of the present invention.

[0007]

In order to solve the above problems, a combustion control system for a dry distillation gasification and combustion apparatus according to the present invention burns solid fuel supplied from a solid fuel supply apparatus to generate dry distillation gas. Combustion control of a dry distillation gasification combustion device including a dry distillation furnace, a combustion furnace for burning the dry distillation gas supplied from the dry distillation furnace, and a waste heat recovery device for recovering the heat of the combustion gas supplied from the combustion furnace a system, the air duct for supplying primary air to the ignition burner dry distillation furnace, false
Connected to the contacts connected to the similar input setting device and the combustion furnace outlet temperature detector.
The automatic control device is equipped with
A primary air first control valve that operates at
The primary air second control valve is arranged in series with the primary air first control valve.
Then , a load fluctuation detector that detects a heat input request of the waste heat recovery apparatus is provided in the waste heat recovery apparatus, and a heat input request of the waste heat recovery apparatus is increased by a signal of the load fluctuation detector. The opening degree is increased at times, and the opening degree is decreased when the heat input requirement is reduced, so that the primary air second control valve is controlled to open and close .
In addition, the pilot burner installed in the combustion furnace
The amount of light detected by the flame detector that detects the flame inside the
When the amount of light exceeds the preset light amount for the burner control device
The combustion function is stopped and the amount of light detected by the flame detector
When the amount of light falls below the preset amount for the burner control device
The feature is that combustion is started without delay .

In the combustion control system of the dry distillation gasification combustion apparatus, the load variation detector is designed to increase the opening degree when the heat input requirement of the waste heat recovery apparatus is large and decrease the opening degree when the heat input requirement is small. Since the primary air control valve is automatically controlled to open and close in proportion to the output signal of, the output of the dry distillation furnace is automatically controlled to reduce the load of the waste heat recovery device even when the physical properties of the injected fuel change. Can be kept constant.

In this case, a secondary air control valve is provided in a blower pipe for supplying secondary air to the combustion furnace, and a gas concentration detector for measuring the gas concentration in the exhaust gas of the combustion furnace is provided. The amount of secondary air to the combustion furnace can be adjusted by controlling the opening and closing of the secondary air control valve according to the signal from the concentration detector.

In the combustion furnace, when the residual oxygen concentration decreases,
The combustion temperature in the combustion furnace rises, but in the worst case, soot is generated due to incomplete combustion due to lack of combustion air,
The amount of secondary air is increased to prevent the generation of soot and the combustion temperature is lowered, and when the residual oxygen concentration rises, the secondary air becomes excessive and the combustion temperature drops, so the secondary air is limited and burned. By raising the temperature, it is possible to always maintain a stable combustion state.

Further, an automatic air setting valve for an ignition burner is provided in a blower pipe for supplying air to the ignition burner of the dry distillation furnace, and an ignition temperature detector is provided in the dry distillation furnace. By the signal below the set temperature, the automatic air setting valve for the ignition burner can be closed to a predetermined angle to suppress the air volume.

This prevents excessive air from flowing into the dry distillation furnace at the start of combustion, ensures and maintains stable combustion of the ignition burner, and prevents gas explosion accident, deflagration, and flashback phenomenon due to excessive air inflow. be able to.

Further, an automatic level meter for detecting the deposition height of the solid fuel in the dry distillation furnace is provided in the dry distillation furnace, and a level control for issuing a full signal when the deposition height of the solid fuel reaches a set value. A device may be provided so that the solid fuel supply from the solid fuel supply device is stopped by the full signal of the level control device.

As a result, the fuel supply to the dry distillation furnace can be automated, and the operation of the dry distillation gasification and combustion device can be simplified, safe and labor-saving.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a combustion control system for a dry distillation gasification combustion apparatus according to the present invention will be described with reference to the drawings.

The combustion control system of the carbonization gasification and combustion apparatus of this embodiment is supplied from the carbonization furnace 4 which combusts the solid fuel supplied from the solid fuel supply device to generate carbonization gas, and the carbonization furnace 4. Combustion furnace 15 for burning dry distillation gas
And a waste heat recovery device 25 that recovers the heat of the combustion gas supplied from the combustion furnace 15, and is installed in a dry distillation gasification combustion device. The solid fuel supply device is composed of a storage tank 1, a fuel cutting device 2, and a transfer device 3.

That is, in the combustion control system of the dry distillation gasification and combustion apparatus of the present embodiment, the primary air control valve 28 is arranged in the blower pipe 18 for supplying the primary air to the dry distillation furnace 4, and the waste heat recovery apparatus is also provided. 25, a load fluctuation detector 26 for detecting the heat input request of the waste heat recovery device 25 is provided, and the signal is sent from the load fluctuation detector 26 when the heat input request of the waste heat recovery device 25 becomes large. The primary air control valve 28 is configured to be opened / closed so that the opening degree is increased and the opening degree is decreased when the heat input requirement is small.

Further, in the combustion control system of the dry distillation gasification and combustion apparatus of this embodiment, the secondary air control valve 13 is arranged in the blower pipe 35 for supplying the secondary air to the combustion furnace 15.
A gas concentration detector 11 for measuring the gas concentration in the exhaust gas of the combustion furnace 15 is provided in the smoke exhaust conduit 10, and the gas concentration detector 11 is provided.
Is used to control the opening / closing of the secondary air control valve 13 to control the amount of secondary air to the combustion furnace 15.

Then, an automatic air setting valve 20 for the ignition burner is provided in the blower pipe 18 for supplying air to the ignition burner 19 of the dry distillation furnace 4, and an ignition temperature detector 21 is provided in the dry distillation furnace 4. A signal below the set temperature of the ignition temperature detector 21 closes the automatic air setting valve 20 for the ignition burner to a predetermined angle to suppress the air volume.

Further, an automatic level meter 5 for detecting the height of solid fuel accumulated in the carbonization furnace 4 is provided in the carbonizer 4, and a full signal is sent when the height of solid fuel accumulated reaches a set value. A level control device 6 for emitting the solid fuel is provided, and the supply of the solid fuel from the solid fuel supply device is stopped by the full signal of the level control device 6.

On the other hand, in operating a series of gasification and combustion devices, first, the setting switch provided in the automatic control device 32 is set to "fuel supply", and then the automatic operation switch provided in the automatic control device 32 is set like the setting switch. When “ON”, the solid fuel level in the dry distillation furnace 4 is measured by the automatic level meter 5, the carrier device 3 is activated by the fuel supply start signal issued by the level control device 6, and then the rated operation signal of the carrier device 3 is activated. Then, the fuel cutting device 2 is activated and the solid fuel stored in the storage tank 1 is started to be supplied to the dry distillation furnace 4.

The solid fuel deposition height in the dry distillation furnace 4 is detected by an automatic level meter 5 using mechanical or ultra-high frequency waves, sound waves, etc., and the fuel deposition height in the dry distillation furnace 4 is controlled by a level controller 6.
When the deposition height set in advance is reached, the level control device 6
The operation of the fuel cutout device 2 is stopped by the full signal generated by the above, and then the transport device 3 is stopped by the operation stop signal of the fuel cutout device 2 and the fuel supply to the dry distillation furnace 4 is stopped. In this case, the start and stop of the fuel supply are always measured by the automatic level meter 5 for the fuel accumulation height in the dry distillation furnace 4 unless the setting switch of the automatic control device 32 is changed to "fuel stop". The carrier device 3 and the fuel cutout device 2 are controlled to be started or stopped by the start / stop signal generated by the level control device 6, so that the fuel accumulation height in the dry distillation furnace 4 is always kept constant.

The smoke exhaust fan 7 is started by the fuel full signal generated by the level control device 6 at the initial stage of the operation start, and the static pressure in the combustion device is proportional to the signal from the combustion furnace outlet static pressure detector 31. The automatic static pressure adjusting valve 8 provided in the smoke exhaust conduit on the downstream side of the recovery device 25 is opened / closed to maintain the static pressure predetermined in the combustion furnace outlet static pressure detector 31, and this static pressure adjustment control is performed by the gasification firing device. It continues as long as it is driven.

Then, the secondary air fan 9 is started by the rated operation signal of the smoke exhaust fan 7. This amount of secondary air is optimal for combustion in the combustion furnace 15 by proportionally opening and closing the secondary air control valve 13 via the line 12 in response to a signal emitted by the gas concentration detector 11 provided in the smoke exhaust conduit 10 at the most downstream side of the device. The secondary air amount is adjusted and controlled. This adjustment control of the secondary air amount is continued as long as the gasification combustion device is operating, but the gas concentration detector 11 includes a residual oxygen concentration detector, a carbon monoxide concentration detector, or a carbon dioxide concentration detector. Can be used.

Subsequently, the primary air fan 14 is activated by the rated operation signal of the secondary air fan 9, and the blower pipe 18 connected to the outlet of the primary air fan 14 is connected to the contact 33 connected to the pseudo input setting device and the combustion. The automatic control device 32 is provided with a contact point 34 connected to the furnace outlet temperature detector 23, the first control valve 22 which operates by a signal of the automatic control device 32 is provided, and the first control valve 22 of the automatic control device 32 is provided at the initial stage of operation. The operating initial opening limited by the value preset in the pseudo input setting device is maintained, and subsequently, the pilot burner 16 provided in the combustion furnace 15 is activated by the rated operation signal of the primary air fan 14 to start the auxiliary combustion. In this case, the pilot burner 16 is the flame detector 1
The amount of light detected in 7 is the pilot burner controller 36
When the amount of light exceeds a preset amount of light, the pilot burner 16 automatically stops the combustion function, and when the amount of light detected by the flame detector 17 becomes less than or equal to the amount of light preset by the pilot burner control device 36, the pilot burner is delayed. It is controlled to start combustion without doing. This control is continued as long as the operation of the gasification combustion device is continued, and prevents gas explosion or the like due to delayed combustion due to misfire or the like at the time of burning dry gas in the combustion furnace 15. In addition to detecting the amount of infrared rays or the amount of ultraviolet rays, the action can be performed by a temperature detector.

Next, the combustion of the ignition burner 19 is started after a delay of a time preset in the timer of the automatic control device 32 which is activated by the activation signal of the pilot burner 16. The air blower tube for the ignition burner 19 is started. Normally, a dedicated pipe is separately provided, but in this embodiment, in order to obtain the air for the ignition burner 19, the blower pipe 18 connected to the outlet of the primary air fan 14 for supplying the primary air to the dry distillation furnace 4 is shared. An automatic air setting valve 20 for the ignition burner 19 is provided in a downstream side pipe line between the first control valve 22 and the primary air control valve 28 provided in the blower pipe 18, and the automatic air setting valve 20 is used as an ignition temperature detector 21. With the ignition burner combustion start signal at a temperature equal to or lower than a preset temperature, the automatic air setting valve 20 is closed to a preset angle, and the air volume is controlled so that stable combustion of the ignition burner 19 can be ensured / maintained.

Ignition of the solid fuel deposited in the dry distillation furnace 4 is started by the ignition and combustion of the ignition burner 19, and the temperature in the dry distillation furnace 4 rises to a temperature above the temperature preset in the ignition temperature detector 21. At the same time when the combustion of the ignition burner 19 is stopped, the automatic air setting valve 20 is fully opened by the combustion stop signal of the ignition burner 19, and the combustion start signal circuit of the ignition burner 19 is opened by the fully open signal of the automatic air setting valve 20. When it is cut off, the reburning of the ignition burner 19 is controlled to be prevented. The primary air blown by the primary air fan 14 has a contact 33 connected to a pseudo input setting device provided in the blower pipe 18 connected to the outlet of the primary air fan 14 and a contact 34 connected to the combustion furnace outlet temperature detector 23, which are automatically controlled by the automatic controller 32. Where the control is controlled by the first control valve 22 which is provided for the automatic control device 32 and which is operated by the signal of the automatic control device 32, and the primary air control valve 28 which is operated by the signal of the load fluctuation detector 26 provided in the waste heat recovery device 25. Becomes
In this case, the first control valve 22 is controlled to be maintained at the operation initial opening which is limited by the value preset in the pseudo input setting device provided in the automatic control device 32, so that the gas explosion in the dry distillation furnace 4 is out of the limit. The amount of primary air is supplied to the dry distillation furnace 4, and dry distillation combustion in the dry distillation furnace 4 is started while preventing the gas explosion phenomenon at the initial stage of dry distillation combustion.

The dry distillation gas generated in the dry distillation furnace 4 is
Is introduced into the combustion furnace 15 connected to the combustion furnace 15 and burned, but when the temperature of the combustion furnace outlet rises due to the combustion of the dry distillation gas introduced, and the temperature exceeds the temperature preset in the automatic controller 32, the pseudo input setting of the automatic controller 32 is made. The contact point 33 connected to the combustion furnace is switched to the contact point 34 connected to the combustion furnace outlet temperature detector 23, the first control valve 22 is automatically opened / closed in proportion to the signal of the combustion furnace temperature detector 23, and is supplied to the dry distillation furnace 4. The amount of primary air generated is controlled and controlled, and the amount of dry distillation gas generated in the dry distillation furnace 4 is controlled. On the other hand, the primary air control valve 28 provided in series with the first control valve 22 is increased in opening degree when the heat input requirement of the waste heat recovery device 25 is large, and is decreased when the heat input requirement is small, First adjustment for opening and closing in proportion to the output signal of the load fluctuation detector 26 provided in the waste heat recovery device 25 to adjust and control the primary air amount, and to open and close in proportion to the signal of the combustion furnace outlet temperature detector 23 In combination with the control of the primary air amount by the valve 22, the dry distillation furnace 4
The amount of primary air supplied to the waste heat recovery device 25 is adjusted so as to maintain a stable load output of the waste heat recovery device 25. This control continues as long as the gasification combustion device is operating.

As described above, the combustion control system of the carbonization gasification and combustion apparatus of this embodiment is started and operated and controlled in accordance with a preset starting order and control plan, and the dry distillation furnace 4 is set to fire. The generation of clinker is prevented by the ash stirring in the grate rotating device 29, and the ash is taken out to the ash storage tank 30 by rotating the grate rotating device 29 in the direction opposite to the stirring direction at regular time intervals. In the continuous operation of the dry distillation gasification and combustion apparatus, when the setting switch of the automatic control device 32 is changed to “fuel stop” and the operation is continued, the fuel in the dry distillation furnace 4 is burned and exhausted to generate dry distillation. The amount of gas gradually decreases, the combustion temperature in the combustion furnace 15 also decreases, and the brightness of the combustion gas also decreases gradually.
When the amount of light detected by the flame detector 17 for detecting the flame in the combustion furnace 15 becomes less than or equal to the amount of light preset in the pilot burner control device 36, combustion is started without delay,
Despite the combustion of the pilot burner 16, the temperature detected by the combustion furnace outlet temperature detector 23 is automatically controlled by the automatic controller 32.
If the temperature falls below the preset temperature, the automatic controller 32
The primary air fan 1 that automatically switches from the contact point 34 connected to the combustion furnace outlet temperature detector 23 provided to the contact point 33 connected to the pseudo input setting device to supply the primary air to the dry distillation furnace 4.
The first control valve 22 provided in the blower pipe 18 connected to the four outlets returns to the initial operation opening degree limited by the value preset in the pseudo input setting device provided in the automatic control device 32.

At this point, the combustion output decreases, so that the load output of the waste heat recovery device 25 subsequent to the combustion furnace 15 is secured, the first control valve 2 is attached to the blower pipe 18 of the primary air.
The primary air control valve 28 provided in series with 2 increases its opening degree by the signal of the load fluctuation detector 26 via the line 27. However, the primary air supplied to the dry distillation furnace 4 does not open the first control valve 22 at the initial operation. The amount of flying soot and dust is prevented from increasing due to the phenomenon of blowing away deposits such as charcoal fire and ash remaining in the dry distillation furnace 4 due to excessive primary air supply.

Further, when the operation continues and the amount of charcoal fire and unburned materials in the dry distillation furnace 4 decreases, and the temperature in the dry distillation furnace 4 falls below the temperature preset in the ignition temperature detector 21, the automatic controller 32 At the same time, the operation of the primary air fan 14 is automatically stopped by the stop signal generated by the control signal of the primary air control valve 22 and the control function of the primary air control valve 28 that regulates and controls the primary air. Following this, the primary air fan 14
The operation of the pilot burner 16 is automatically stopped with a delay of a time preset in the timer of the automatic control device that is activated by the stop signal of No. The stop control function is also stopped.

After the operation of the pilot burner 16 is stopped, the operation of the secondary air fan 9 is automatically stopped with a delay of a time preset in the timer, and at the same time, the exhaust gas at the most downstream of the gasification combustion apparatus is exhausted. The control function of the secondary air control valve 13 that regulates and controls the secondary air supplied to the combustion furnace 15 by the signal of the gas concentration detector 11 provided in the conduit 10 is also stopped, and following the operation stop of the secondary air fan 9, The operation of the smoke exhaust fan 7 is automatically stopped after a delay of a time preset in the timer of the automatic control device 32 that is activated by the stop signal of the secondary air fan 9. At the same time, the signal output from the combustion furnace outlet static pressure detector 31 provided at the combustion furnace outlet proportionally opens and closes the automatic static pressure control valve 8 provided at the downstream flue of the waste heat recovery device 25 to reduce the static pressure in the combustion furnace 15. The static pressure adjustment control function for adjustment control is stopped, and the operation of the series of gasification combustion devices is terminated.

[0033]

According to the combustion control system of the dry distillation gasification and combustion apparatus of the present invention, the opening degree is increased when the heat input requirement of the waste heat recovery apparatus is large, and the opening degree is decreased when the heat input requirement is small. In addition, since the primary air control valve is automatically controlled to open and close in proportion to the output signal of the load fluctuation detector, even if the physical properties of the injected fuel change, this is calmed down and the dry distillation furnace is operated from the start to the end. The output can be automatically controlled to keep the load of the waste heat recovery device constant. Also, the primary air
One control valve is preset in the pseudo input setting device provided in the automatic control device.
Is controlled to be held at the initial operating opening that is limited by the value
And dry up the primary air volume outside the gas explosion limit in the dry distillation furnace.
Supply to the furnace to prevent the gas explosion phenomenon in the early stage of dry distillation combustion.
The dry distillation combustion in the dry distillation furnace is started. In addition, the combustion furnace
The pilot burner installed in the furnace detects flames in the combustion furnace.
The amount of light detected by the flame detector
The combustion function is stopped when the amount of light exceeds the preset value for the control device.
However, the amount of light detected by the flame detector is controlled by the pilot burner system.
Burns without delay when the amount of light is less than the preset light amount for the control device
To start the operation of the gasification combustion device
In the combustion furnace by continuing as long as
Gas in delayed combustion due to misfire when burning dry-distilled gas
Explosion etc. can be prevented.

Further, a secondary air control valve is provided in a blower pipe for supplying secondary air to the combustion furnace, and a gas concentration detector for measuring the gas concentration in the exhaust gas of the combustion furnace is provided to detect the gas concentration. When the residual oxygen concentration decreases by controlling the opening and closing of the secondary air control valve by the signal of the reactor and adjusting the amount of secondary air to the combustion furnace, the amount of secondary air is increased to generate soot and smoke. When the combustion temperature is lowered and the residual oxygen concentration rises, the secondary air can be restricted to raise the combustion temperature, and thus a stable combustion state can be always maintained.

Then, an automatic air setting valve for an ignition burner is provided in a blower pipe for supplying air to the ignition burner of the dry distillation furnace, and an ignition temperature detector is provided in the dry distillation furnace. A signal below the set temperature closes the automatic air setting valve for the ignition burner to a predetermined angle and suppresses the air flow to prevent excess air from flowing in at the combustion start timing of the dry distillation furnace, ensuring stable combustion of the ignition burner. -It is possible to maintain and prevent gas explosion accident, deflagration, and flashback phenomenon due to excess air inflow.

Further, an automatic level meter for detecting the deposition height of the solid fuel in the dry distillation furnace is provided in the dry distillation furnace, and a level control for issuing a full signal when the deposition height of the solid fuel reaches a set value. A device is provided, and by supplying a full signal from the level control device, the supply of solid fuel from the solid fuel supply device is stopped, so that the fuel supply to the dry distillation furnace is automated and the operation of the dry distillation gasification combustion device is simplified. It is possible to achieve safety and labor saving.

[Brief description of drawings]

FIG. 1 is a flow sheet showing an embodiment of a combustion control system of a carbonization gasification and combustion apparatus of the present invention.

[Explanation of symbols]

1 storage tank 2 Fuel cutting device 3 Conveyor 4 dry distillation furnace 5 Automatic level meter 6 level control device 7 Smoke exhaust fan 8 Automatic static pressure control valve 9 Secondary air fan 10 smoke exhaust conduit 11 Gas concentration detector 12 lines 13 Secondary air control valve 14 Primary air fan 15 Combustion furnace 16 pilot burner 17 Flame detector 18 air duct 19 ignition burner 20 Automatic air setting valve 21 Ignition temperature detector 22 First control valve 23 Combustion furnace outlet temperature detector 24 lines 25 Waste heat recovery device 26 Load fluctuation detector 27 lines 28 Primary air control valve 29 Grate rotating device 30 ash storage tank 31 Combustion furnace outlet static pressure detector 32 Automatic control device 33 switching contacts 34 switching contacts 35 Secondary air blower 36 Pilot burner controller

Continuation of front page (51) Int.Cl. ⁷ Identification code FI F23B 5/00 301 F23B 5/00 301 F23G 5/027 ZAB F23G 5/027 ZABZ 5/16 ZAB 5/16 ZABE 5/46 ZAB 5/46 ZABA F23N 3/02 F23N 3/02 5/00 5/00 K 5/08 5/08 G (58) Fields investigated (Int.Cl. ⁷ , DB name) F23G 5/50 F23G 5/027 C10B 53 / 00 C10J 3/00 C10J 3/02 F23B 5/00 301 F23N 3/02 F23N 5/00 F23N 5/08

Claims (4)

(57) [Claims] 1. A dry distillation furnace for combusting a solid fuel supplied from a solid fuel supply apparatus to generate a dry distillation gas, a combustion furnace for combusting a dry distillation gas supplied from the dry distillation furnace, and a supply from the combustion furnace. A combustion control system for a carbonization gasification combustion device equipped with a waste heat recovery device for recovering the heat of the combustion gas, which is connected to a blast pipe that supplies primary air to an ignition burner of a dry distillation furnace and a pseudo input setting device. Contact point and combustion furnace outlet temperature
The automatic control device is equipped with contacts connected to the detector, and the automatic control
When the primary air first control valve that operates by the signal of the device is installed
A primary air second control valve is arranged in series with the primary air first control valve, and a load fluctuation detector that detects a heat input request of the waste heat recovery device is disposed in the waste heat recovery device. The primary air second control valve is opened / closed by the signal of the load fluctuation detector so that the opening degree is increased when the heat input request of the waste heat recovery device is large and is decreased when the heat input request is small. Controlled and pilot burner installed in the combustion furnace
Is the light detected by the flame detector that detects the flame in the combustion furnace.
The amount of light is less than the preset amount of light in the pilot burner controller.
When it goes up, the combustion function is stopped and the light detected by the flame detector is detected.
The amount of light is less than the preset amount of light in the pilot burner controller.
A combustion control system for a carbonization gasification and combustion device, characterized in that combustion is started without delay when the temperature becomes lower . 2. A secondary air control valve is provided in a blower pipe for supplying secondary air to the combustion furnace, and a gas concentration detector for measuring the gas concentration in the exhaust gas of the combustion furnace is provided to detect the gas concentration. Control the opening and closing of the secondary air control valve by the signal of the device,
The combustion control system for a carbonization gasification combustion device according to claim 1, wherein the amount of secondary air to the combustion furnace is adjusted. 3. An automatic air setting valve for an ignition burner is provided in a blower pipe for supplying air to an ignition burner of a dry distillation furnace, and an ignition temperature detector is provided in the dry distillation furnace. The combustion control system for a carbonization gasification and combustion device according to claim 1 or 2, wherein an automatic air setting valve for the ignition burner is closed to a predetermined angle by a signal below a set temperature to suppress the air flow. 4. A level control for arranging an automatic level meter for detecting a deposition height of solid fuel in the carbonization furnace in the carbonization furnace, and for issuing a full signal when the deposition height of the solid fuel reaches a set value. 4. A dry distillation gasification combustion apparatus according to claim 1, 2 or 3, wherein a device is provided and the supply of the solid fuel from the solid fuel supply device is stopped by a full signal of the level control device. Combustion control system.