JP2012087977A - Incineration equipment and operation method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide incineration equipment which employs an air-cooled wall in a cooling system for a combustion chamber of an incinerator, and which effectively uses hot air having passed in the air-cooled wall and combusts refuse in accordance with refuse quality, and to provide an operation method of the equipment.SOLUTION: The incineration equipment 1 includes: the incinerator 2; the air-cooled wall 3 laid on a furnace wall of the incinerator; and a distributing and supplying means distributing and supplying hot air after cooling the air-cooled wall to primary combustion air and secondary combustion air. The operation method of the incineration equipment comprises detecting a quantity of heat generation of an incinerated substance and distributing and supplying hot air after cooling the air-cooled wall to the primary combustion air and the secondary combustion air in accordance with the detected quantity of heat generation of the incinerated substance.

Description

  The present invention relates to an incineration facility and an operation method thereof, and more particularly, to an incineration facility including an air-cooled wall type incinerator and an operation method thereof.

  Conventionally, a water-cooled wall method and an air-cooled wall method are known as methods for cooling the furnace body of an incinerator.

  In recent years, in order to improve the waste heat recovery rate, a water cooling method is often adopted. However, particularly in a small and medium-sized furnace whose processing amount is smaller than about 100 (tons / day), when the calorific value of the combustion product decreases. Or, when the incineration treatment load factor decreases, the exhaust gas temperature decreases and the exhaust gas conditions for dioxin countermeasures (more than 850 ° C in the secondary combustion chamber for 2 seconds) cannot be maintained. It was necessary to increase the exhaust gas temperature by using a large amount of gas. This problem can be solved by adopting a structure in which the primary combustion chamber of the incinerator is provided with an air cooling wall as a refractory structure instead of a water cooling wall, and the amount of heat absorbed is lower than that of the water cooling wall system.

  In order to reliably cool the air cooling wall, a certain amount of air is inserted into the air cooling wall regardless of the amount of heat generated by the incineration product.

  Conventionally, warm air after cooling an air-cooled wall has been released into the atmosphere without recovering its energy, or has been used as part of white smoke prevention air (for example, Patent Document 1). However, if the hot air after cooling the air-cooled wall is used as white smoke prevention air or opened to the atmosphere as it is, the heat recovered by the air-cooled wall is not recovered by the waste heat boiler and is not effectively used.

  Therefore, the example which inserts the warm air after cooling an air cooling wall into a furnace as combustion air is also seen (for example, patent documents 2-5).

  Recent incinerators are operated to increase the temperature of the primary combustion air when the calorific value is low and to lower the primary combustion air temperature when the calorific value is high, depending on the waste quality. Here, the waste quality is a general term for physical properties and chemical properties of waste. The physical properties of waste include the type and composition of waste, bulk specific gravity, so-called three components such as moisture, combustible and ash, and chemical properties include elemental composition and calorific value. As a trend of waste quality, for example, waste with much paper and plastic, less waste and incombustibles, has a higher calorific value, and the higher the percentage of moisture in the garbage, the lower the calorific value. The most important thing in the analysis of waste quality is the amount of heat generated by the waste.

  The waste quality can be obtained by various methods. For example, in Patent Document 6, the surface shape of dust immediately before and immediately after dust is newly added to the hopper is calculated from the distance distribution detected by a scanning laser level meter installed above the hopper. Based on the surface distance, the volume of waste that has been thrown in is calculated, and based on the calculated volume of waste and the weight of the waste that has been thrown into the hopper, the specific gravity and heat quantity of newly thrown waste are calculated. Are classified and stored for each input, and the amount of heat supplied is calculated based on these data.

  In addition, for example, in Patent Document 7, the weight of garbage thrown into the hopper of the incinerator, the total volume of waste just before thrown in the hopper, the total volume just after thrown, and the inside of the hopper are generated. The waste quality is estimated from the amount of waste moved inside the hopper due to the waste compression and the weight of waste put into the hopper. The total volume of garbage is calculated by using a scanning laser level meter.

  As another method, for example, in Patent Document 8, the amount of heat passing through the grate is calculated from the average temperature of the grate and the amount of ventilation, and the increase or decrease in the amount of heat generated by the combustion product is grasped based on the amount of heat passing through the grate.

  Other methods of knowing the amount of heat generated by the garbage include, for example, a method of measuring the amount of heat generated by a bomb calorimeter, a method of calculating the theoretical calorific value of each component from elemental analysis (chemical component analysis), and the heat generated from the three components of the waste. A method of calculating from a quantity estimation formula is known (Non-Patent Document 1, etc.).

  However, in the conventional case where the hot air after cooling the air cooling wall is inserted into the furnace as combustion air, the air at the outlet of the air cooling wall is simply inserted into the furnace as primary combustion air or secondary combustion air. For this reason, for example, when burning high-quality waste, it may be desirable to lower the temperature of the primary combustion air in order to cool the stalker to prevent damage to the stalker, but the warm air at the outlet of the air cooling wall is simply used as the primary combustion air. If inserted, the temperature of the primary combustion air becomes high, and it becomes difficult to lower the temperature. In addition, simply inserting the hot air at the outlet of the air cooling wall into the furnace as secondary combustion air reduces the required amount of secondary combustion air when the calorific value is low. The amount of secondary combustion air is less than the amount, and the hot air after cooling the air cooling wall may not be used as the secondary combustion air.

JP 2000-297918 A JP-A-57-10015 JP 58-22818 Japanese Utility Model Publication No. 60-9559 Japanese Utility Model Publication No. 63-190723 Japanese Patent No. 3926173 Japanese Patent No. 3928709 Japanese Patent No. 4448799 Takuma Environmental Technology Study Group, “Waste Incineration Technology, Basic Terms for Painting [Revised Supplement]”, Ohmsha, August 25, 2003, p. 54-p. 63

  In view of the above-described conventional problems, the present invention makes effective use of warm air after passing through an air cooling wall and enables combustion according to the waste quality when an air cooling wall is employed in a combustion chamber cooling system of an incinerator. The main purpose is to provide incineration facilities and operating methods.

  In order to solve the above problems, the present invention provides, as a first means, an incinerator, an air cooling wall provided on a furnace wall of the incinerator, and hot air after cooling the air cooling wall with primary combustion air and secondary air. Distributing and supplying means for distributing and supplying to combustion air. An incineration facility is provided.

  According to the present invention, as the second means, in the first means, the distribution supply means detects a calorific value of the incinerated product to be incinerated in the incinerator, and after the air cooling wall cooling. And a control means for distributing and supplying the warm air to the primary combustion air and the secondary combustion air according to the detected value of the heat quantity detection means.

  Further, according to the present invention, as a third means, in the second means, when the control means detects a value detected by the heat quantity detection means exceeding a predetermined value, Provided is an incineration facility characterized in that the distribution supply ratio to the secondary combustion air is controlled to be higher than the distribution supply ratio to the primary combustion air.

  Further, the present invention provides, as a fourth means, a first duct connected between the outside air inlet and the primary combustion air inlet of the incinerator in the second or third means, A second duct connected between the first duct and the secondary combustion air inlet of the incinerator, a primary fan interposed in the first duct downstream from the second duct connection position, and A secondary blower interposed in the second duct, and the distribution supply means is connected between the hot air exhaust port of the air cooling wall and the second duct upstream of the secondary blower. An incineration facility is provided, comprising a hot air duct, wherein the control means controls at least one of the primary blower and the secondary blower according to a detection value of the heat quantity detection means.

  Further, according to the present invention, as a fifth means, in the fourth means, when the calorific value detected by the heat quantity detection means is not more than a predetermined value, the control means has a flow rate of the secondary blower <air cooling wall. Controlled by the relationship (1) of warm air flow after cooling <primary blower flow, and when the heat generation exceeds a predetermined value, warm air flow after cooling the air-cooled wall <secondary blower flow <primary blower flow rate An incineration facility characterized by being controlled by a relationship is provided.

  Further, the present invention provides, as a sixth means, the first duct connected between the outside air inlet and the primary combustion air inlet of the incinerator in the second or third means, A second duct connected between the first duct and the secondary combustion air inlet of the incinerator, a primary fan interposed in the first duct downstream from the second duct connection position, and A secondary blower interposed in the second duct, wherein the distribution supply means supplies the first air that is downstream of the second duct connection position to the first duct after the air cooling wall cooling. A hot air duct, a second hot air duct for supplying the hot air after cooling the air cooling wall to the second duct upstream of the secondary blower, and a first damper interposed in the first hot air duct; A second damper interposed in the second hot air duct, and the control Stage provides incinerator, characterized by controlling at least one of the first damper and the second damper in accordance with a detection value of the heat detector.

  Moreover, it is preferable that this invention is further equipped with the primary combustion air preheater which preheats primary combustion air in any one of the said 1st-6th means as a 7th means.

  Moreover, it is preferable that this invention is further equipped with a waste-heat recovery boiler in any one of the said 1st-7th means as an 8th means.

  Further, the present invention is a ninth method for operating an incinerator equipped with an air-cooled wall type incinerator, which detects the amount of heat generated from the incinerator and detects the warm air after cooling the air-cooled wall. The operation method is characterized by distributing and supplying the primary combustion air and the secondary combustion air according to the calorific value of the incinerated material.

  Further, the present invention provides, as a tenth means, in the ninth means, when the detected calorific value exceeds a predetermined value, the hot air after cooling the air-cooled wall is prioritized over the primary combustion air. And an operation method characterized by distributing and supplying to the secondary combustion air.

  According to the present invention, the hot air after cooling the air-cooled wall can be distributed and supplied to the primary combustion air and the secondary combustion air according to the quality of the incinerator, so that the hot air after passing through the air-cooled wall is effectively used. However, it is possible to combust according to the waste quality.

  In addition, by using the warm air after cooling the air-cooled wall as at least one of the primary combustion air and the secondary combustion air, it becomes possible to recover the energy of the warm air with the waste heat boiler, increasing the amount of boiler evaporation, The heat recovery rate is improved.

  In addition, when the primary combustion air or the secondary combustion air is preheated by the preheater by using the warm air after cooling the air cooling wall as at least one of the primary combustion air and the secondary combustion air, The amount of steam used for the process can be reduced.

  In addition, by supplying hot air after cooling the air-cooled wall preferentially to the secondary combustion air (rather than the primary combustion air), the air temperature at the air-cooling wall can be reduced without making the primary combustion air temperature relatively high during high-quality waste. The recovered heat can be inserted into the furnace.

  In addition, in an incinerator equipped with a steam turbine drive generator, the amount of steam at the inlet of the steam turbine increases and the amount of power generation increases.

  Moreover, the heat recovery effect can be effectively obtained by controlling the ratio of distributing the warm air at the outlet of the air cooling wall to the primary combustion air and the secondary combustion air according to the waste quality.

  Furthermore, the hot air after cooling the air-cooled wall is used in preference to the secondary combustion air over the primary combustion air, or by controlling the distribution ratio between the primary combustion air and the secondary combustion air using a damper, By controlling the secondary combustion air to increase even if the calorific value of the incinerated product rises, it is possible to reduce the temperature of the primary combustion air by reducing the warm air supplied to the primary combustion air. Can avoid damage.

It is a system figure showing a 1st embodiment of incineration equipment concerning the present invention. It is a system diagram which shows the normal driving | running state of the incineration equipment of FIG. It is a system diagram which shows the driving | running state at the time of high quality refuse incineration of the incinerator of FIG. It is a system diagram which shows 2nd Embodiment of the incineration equipment which concerns on this invention.

  Preferred embodiments of the present invention will be described below with reference to the drawings. Throughout the drawings and all the embodiments, the same or similar components may be denoted by the same reference numerals, and redundant description may be omitted.

  FIG. 1 is a system diagram showing a first embodiment of an incineration facility according to the present invention. As shown in FIG. 1, the incineration facility 1 includes an incinerator 2 and an air cooling wall 3 provided on the furnace wall of the incinerator 2.

  The incinerator 2 in the illustrated example is a typical stoker furnace. The incinerator 2 is supplied with waste from a waste pit (not shown) via a hopper 2a. The waste pit is a facility provided for temporarily storing the waste carried into the incineration facility and supplying the waste from the hopper 2a to the incinerator 2 while adjusting the quality of the waste.

  The incinerator 2 includes a primary combustion air inlet 2b and a secondary combustion air inlet 2c. A first duct 4 is connected to the primary combustion air inlet 2b of the incinerator 2, and the first duct 4 is connected to an outside air inlet (not shown) provided in the garbage pit. A second duct 5 is connected to the secondary combustion air inlet 2 c of the incinerator 2, and the second duct 5 is connected to the first duct 4. A primary blower 6 is interposed in the first duct 4 at a position downstream of the connection position of the second duct 5. A secondary blower 7 is interposed in the second duct 5.

  The air cooling wall 3 can be formed by providing a cooling air passage (not shown) in the combustion chamber inside the furnace wall of the incinerator 2 having a refractory structure. The air cooling wall 3 includes a cooling air introduction port 3a and a hot air exhaust port 3b. A third duct 8 is connected to the cooling air inlet 3 a of the air cooling wall 3, and an air cooling wall blower 9 </ b> F for sending cooling air to the air cooling wall 3 is connected to the third duct 8. A hot air duct 9 is connected to the hot air exhaust port 3 b of the air cooling wall 3, and the hot air duct 9 is connected to the second duct 5 upstream of the secondary blower 7.

  The incineration facility 1 includes distribution supply means for distributing and supplying the warm air after cooling the air cooling wall 3 to the primary combustion air and the secondary combustion air in accordance with the waste quality. The distribution supply means includes a hot air duct 9 connected between the hot air exhaust port 3 b of the air cooling wall 3 and the second duct 5 upstream of the secondary blower 7. The distribution supply means includes a heat quantity detection means for detecting the amount of heat generated from the incinerated product to be incinerated in the incinerator 2, and hot air after cooling the air cooling wall 3 according to a detection value of the heat quantity detection means. And control means 10 for distributing and supplying the combustion air and the secondary combustion air.

  The calorific value detection means is a known means for grasping the calorific value at the time of combustion of the incinerated material, for example, means disclosed in Patent Documents 6 to 8, or means for measuring the calorific value by a bomb calorimeter. Further, means for calculating the theoretical calorific value of each component from elemental analysis (chemical component analysis), means for calculating from a calorific value estimation formula from three waste components, and the like can be used. In the illustrated example, a scanning laser level meter 11, a weight meter 12 attached to a garbage transporting crane (shown) and a rotary waste speedometer 13 are used as the heat quantity detection means, and the control means calculates from these measured values. Means for calculating the amount of heat by the apparatus (see Patent Documents 6 and 7) is employed.

  The primary blower 6 supplies air attracted from a garbage pit (not shown) through the first duct 4 to the lower part of the stoker (grate) of the incinerator 2 through the primary combustion air inlet 2b. The primary combustion air causes primary combustion (decomposition combustion) of dust on the stoker.

  In addition, the secondary blower 7 blows air attracted through the second duct 5 as secondary combustion air into the secondary combustion (gas combustion) chamber above the stoker of the incinerator 2 through the secondary combustion air introduction port 2c.

  A primary combustion air preheater 14 can be interposed in the first duct 4. Furthermore, the secondary combustion air preheater 15 illustrated by the phantom line can be interposed in the second duct 5 as necessary. Further, this type of stoker-type incinerator 2 is generally provided with a waste heat recovery boiler (not shown) for recovering waste heat of exhaust gas.

  An example of a method for operating the incineration facility having the above configuration will be described.

  FIG. 2 shows an operating state during normal operation, that is, when the calorific value of the incinerated product obtained by the calorific value detection means is, for example, 8400 (kJ / kg) or less.

  In FIG. 2, the temperature in the waste pit (not shown), that is, the temperature of the air drawn into the first duct 4 from the outside air inlet (not shown) of the waste pit is 20 ° C. Each device is set as follows.

Primary blower 6: Set flow rate 9500m ³ N / hour (standard cubic meter / hour)
Secondary blower 7: Set flow rate 5810m ³ N / hour Air cooling wall blower 9F: Set flow rate 7200m ³ N / hour Primary combustion air preheater 14: Set temperature 140 ° C
The control means 10 controls each device 6, 7, 9F, 14 so that it becomes each said setting value. With the above setting, the air pushed out by the air cooling wall blower 9 </ b> F exchanges heat with the air cooling wall 3, then becomes warm air and is sent to the second duct 5 at a flow rate of 7200 m ³ N / hour. Here, the flow rate of the secondary blower 7 is 5810 m ³ N / hour <the flow rate of the air cooling wall blower 9F is 7200 m ³ N / hour <the flow rate of the primary blower 6 is 9500 m ³ N / hour. The warm air sent to the duct 5 is distributed to the secondary blower 7 and the first duct 4, 5810 m ³ N / hour is sent to the secondary blower 7, and is attracted to the primary blower 6 to the first duct 4. 1390m ³ N / hour is sent. The inlet air temperature of the primary blower 6 is 32 ° C. by mixing the air drawn from the outside air inlet (not shown) of the garbage pit and the warm air heated by the air cooling wall 3.

  Next, when the calorific value of the incinerated product rises, when the calorific value of the incinerator in the furnace obtained by the calorific value detection means exceeds 11500 (kJ / kg), for example, as shown in FIG. The devices 10, 7, and 14 are controlled by the means 10 by changing the settings as follows, for example.

Primary blower 6: Set flow rate 11590m ³ N / hour Secondary blower 7: Set flow rate 8180m ³ N / hour Primary combustion air preheater 14: Stop The flow rate of the air cooling wall blower 9F is the cooling of the furnace body of the incinerator 2 Therefore, the flow rate is always controlled at a constant flow rate (7200 m ³ N / hour) regardless of the amount of heat generated by the incinerated product.

As shown in FIG. 3, (flow rate of air cooling wall blower 9F 7200m ³ N / hour) <(flow rate of secondary blower 7 8180m ³ N / hour) <(flow rate of primary blower 6 11590m ³ N / hour) ) is because warm air sent to the second duct 5 by cooling the wall blower. 9F, while being attracted to all secondary blower 7, shortage ^{(8180m 3 N-7200m 3 N} = 980m 3 N) is Attracted from the first duct 4 to the second duct 5. In the second duct 5, the hot air heated by the air cooling wall 3 and the normal temperature air attracted from the garbage pit are mixed, so that the mixed air temperature becomes 90 ° C. and is pushed out from the secondary blower 7. , And sent to the secondary combustion air inlet 2c. Since the warm air heated by the air cooling wall 3 does not flow into the first duct 4, the primary combustion air preheater 14 is stopped so that the low temperature (20 ° C.) primary combustion air is sent to the primary combustion chamber below the stoker. Can prevent grate damage.

  As described above, the warm air after cooling the air-cooled wall is distributed and supplied to the primary combustion air and secondary combustion air according to the waste quality, so the hot air after passing through the air-cooled wall is used effectively and according to the waste quality. Enables burning.

  Moreover, the cooling air pushed out from the air cooling wall blower 9 </ b> F becomes hot air by heat exchange when passing through the air cooling wall 3 of the incinerator 2. This hot air is inserted from the air cooling wall 3 through the hot air duct 9 into the second duct 5 connected to the suction port of the secondary blower 7 and used as secondary air. Therefore, the thermal energy of warm air can be effectively utilized by recovering heat with a waste heat boiler or the like without being discharged out of the system. Further, when the secondary combustion air preheater 15 is additionally provided, the inlet air temperature of the secondary combustion air preheater 15 can be increased, so that the amount of air preheating steam can be reduced and the air preheater can be downsized. Can be planned.

  Further, of the warm air that has cooled the air cooling wall 3, the surplus portion other than that used as the secondary air flows into the primary blower 6 and is used as the primary combustion air, whereby the primary combustion air preheater 14. Thus, the amount of steam for preheating the primary combustion air in the primary combustion air preheater 14 can be reduced. In this case, since the heat exchange amount of the primary combustion air preheater 14 can be reduced, the primary combustion air preheater 14 can be downsized.

  And when the calorific value of the combustion product rises, it automatically controls so that the secondary combustion air increases, reduces the amount of hot air used as the primary combustion air, and lowers the primary combustion air temperature, Damage can be avoided.

  In recent years, incinerators often have a generator that generates power using a steam turbine that uses waste heat from the incinerator. In the case of incinerators that have such a generator, the amount of steam in the waste heat boiler increases. However, if the amount of steam used in the preheater decreases, the amount of steam at the turbine inlet increases and the amount of power generation can be increased.

  For example, two incinerators with a treatment scale of 100 (tons / 24 hours) are installed, and an incinerator with a boiler condition of 4 MPa and a generator at 400 ° C. (air preheating is only for primary combustion air preheaters. Secondary combustion air preheating is provided. If there is no equipment.) Since the exchange heat amount of about 1.5 (GJ / hour) in the air-cooled wall thrown away in the conventional incinerator can be used effectively, the heat generation amount of the boiler is about 230 (kg / hour) on average. Can be increased. In addition, the amount of heat exchanged by the air preheater is reduced, and the heat transfer area can be reduced by about 10%.

  The incineration equipment of the present invention has the same amount of waste heat boiler evaporation as compared to the case where a water-cooled wall is used, and the load ratio of the incineration amount is low compared to the case where a water-cooled wall is used, or Even if the calorific value of the incinerated product is low, it is possible to operate the incinerator in compliance with the dioxin guidelines without supporting combustion.

  Next, a second embodiment of the incineration facility according to the present invention will be described with reference to FIG. In the incineration facility 1A of the second embodiment, the distribution supply means supplies the first hot air duct 9a that supplies the hot air after cooling the air cooling wall 3 to the first duct 4 on the downstream side from the connection position of the second duct 5. A second hot air duct 9b for supplying the hot air after cooling the air cooling wall 3 to the second duct 5 upstream from the secondary blower 7, and a first damper 20 interposed in the first hot air duct 9a. And a second damper 21 interposed in the second hot air duct 9b.

  Further, by controlling the first damper 20 and the second damper 21 in accordance with the detection value of the heat quantity detection means, the flow rate ratio for distributing the warm air after cooling the air cooling wall to the primary combustion air and the secondary combustion air is controlled. . As the heat quantity detection means, a known means can be adopted as in the first embodiment.

  In the illustrated example, the first hot air duct 9a and the second hot air duct 9b are configured by branching a common hot air duct 9ab at a downstream position in the middle, but two separate ones that do not have a common part. It can also be constituted by a duct.

  According to the incineration facility 1A of the second embodiment having such a configuration, for example, when the detection value of the heat quantity detection means is equal to or less than a predetermined value, the first damper 20 and the second damper 21 are appropriately controlled to the opening degree. A part of the hot air can be supplied to the primary combustion air to raise the temperature of the primary combustion air, and the remaining part of the hot air can also be supplied to the secondary combustion air to supply the high-temperature secondary combustion air .

  When the detection value of the calorific value detection means exceeds a predetermined value, that is, when high quality waste is detected, the passage flow rate of the second damper 21 is larger than the passage amount of the first damper 20. By controlling the first damper 20 and the second damper 21 to increase the amount of secondary combustion air and using most (or all) of the warm air as secondary combustion air, the temperature used as the primary combustion air Reduce the amount of wind (or nothing at all) and lower the temperature of the primary combustion air. Thereby, damage to the grate can be avoided. In addition, the same effects as those of the first embodiment can be obtained.

  The present invention is not limited to the above-described embodiment, and can be changed without departing from the spirit of the present invention. For example, the incineration facility of the first embodiment discloses a configuration in which warm air distribution is controlled by controlling the rotation speed of the blower by the control means, and the incineration facility of the second embodiment is configured to control the degree of opening / closing of the damper by the control means. However, it is also possible to adopt a configuration in which the hot air is distributed and controlled by combining the first embodiment and the second embodiment.

DESCRIPTION OF SYMBOLS 1, 1A incineration equipment 2 Incinerator 3 Air cooling wall 4 1st duct 5 2nd duct 6 Primary blower 7 Secondary blower 8 3rd duct 9, 9ab Hot air duct 9a 1st hot air duct 9b 2nd hot air duct 9F Air cooling Wall blower 10 Control means 14 Primary combustion air preheater 15 Secondary combustion air preheater 20 First damper 21 Second damper

Claims (10)

An incinerator; an air cooling wall provided on a furnace wall of the incinerator; and a distribution supply means for distributing and supplying the warm air after cooling the air cooling wall to the primary combustion air and the secondary combustion air. Incineration equipment to do. The distribution supply means includes a calorific value detecting means for detecting the calorific value of the incinerated product to be incinerated in the incinerator, and the hot air after cooling the air-cooled wall according to the detected value of the calorific value detecting means and the primary combustion air and the secondary air. The incineration facility according to claim 1, comprising control means for distributing and supplying the secondary combustion air. When the detected value of the heat quantity detecting means exceeds a predetermined value, the control means is configured such that the distribution supply ratio of the warm air after cooling the air cooling wall to the secondary combustion air is larger than the distribution supply ratio to the primary combustion air. The incineration equipment according to claim 2, wherein the incineration equipment is controlled so as to be higher. A first duct connected between the outside air intake and the primary combustion air inlet of the incinerator, and connected between the first duct and the secondary combustion air inlet of the incinerator A second duct, a primary fan interposed in the first duct downstream from the second duct connection position, and a secondary fan interposed in the second duct;
The distribution supply means includes a warm air duct connected between the warm air exhaust port of the air cooling wall and the second duct upstream of the secondary blower,
The incinerator according to claim 2 or 3, wherein the control means controls at least one of the primary blower and the secondary blower in accordance with a detection value of the heat quantity detection means. The control means includes
When the calorific value detected by the calorific value detection means is not more than a predetermined value, control so that the flow rate of the secondary blower <the flow rate of warm air after cooling the air-cooled wall <the flow rate of the primary blower,
5. The incineration facility according to claim 4, wherein when the heat generation amount exceeds a predetermined value, control is performed so that the hot air flow rate after cooling the air cooling wall <the flow rate of the secondary blower <the flow rate of the primary blower. A first duct connected between the outside air intake and the primary combustion air inlet of the incinerator, and connected between the first duct and the secondary combustion air inlet of the incinerator A second duct, a primary fan interposed in the first duct downstream from the second duct connection position, and a secondary fan interposed in the second duct;
The distribution supply means includes a first hot air duct that supplies the warm air after cooling the air-cooled wall to the first duct downstream from the second duct connection position, and the hot air after cooling the air-cooled wall is the second air. A second hot air duct supplied to the second duct upstream from the next blower, a first damper interposed in the first hot air duct, a second damper interposed in the second hot air duct, With
The incinerator according to claim 2 or 3, wherein the control means controls at least one of the first damper and the second damper according to a detection value of the heat quantity detection means. The incineration facility according to any one of claims 1 to 6, further comprising a primary combustion air preheater that preheats the primary combustion air. The incineration facility according to claim 1, further comprising a waste heat recovery boiler. A method of operating an incinerator equipped with an air-cooled wall type incinerator, which detects the calorific value of the incinerated material, and the warm air after cooling the air-cooled wall is subjected to primary combustion air and air according to the detected calorific value of the incinerated material. The operation method according to claim 1, wherein the operation method comprises distributing and supplying to the secondary combustion air. The warm air after cooling the air-cooled wall is distributed and supplied to the secondary combustion air in preference to the primary combustion air when the detected calorific value exceeds a predetermined value. Driving method.

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