CN101501399B - Combustion controller for stoker type incinerator - Google Patents
Combustion controller for stoker type incinerator Download PDFInfo
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- CN101501399B CN101501399B CN2007800299505A CN200780029950A CN101501399B CN 101501399 B CN101501399 B CN 101501399B CN 2007800299505 A CN2007800299505 A CN 2007800299505A CN 200780029950 A CN200780029950 A CN 200780029950A CN 101501399 B CN101501399 B CN 101501399B
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 112
- 230000001105 regulatory effect Effects 0.000 claims abstract description 56
- 238000002156 mixing Methods 0.000 claims description 122
- 230000008520 organization Effects 0.000 claims description 46
- 230000001276 controlling effect Effects 0.000 claims description 40
- 230000007246 mechanism Effects 0.000 claims description 31
- 238000001514 detection method Methods 0.000 claims description 25
- 230000003134 recirculating effect Effects 0.000 abstract description 11
- 239000007789 gas Substances 0.000 description 344
- 239000001301 oxygen Substances 0.000 description 70
- 229910052760 oxygen Inorganic materials 0.000 description 70
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 67
- 230000008676 import Effects 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 10
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 8
- 239000002956 ash Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 239000003595 mist Substances 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 6
- 230000000630 rising effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 150000002926 oxygen Chemical class 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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- 238000003756 stirring Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
A combustion control unit for stoker-fired combustion furnace including air flow rate regulating means (30a) for regulating of the rate of air flow to air flow channel (30); temperature detecting means 35(35a) for detecting of the temperature of air-mixed recirculating gas; and combustion control means (60) adapted to have the value of detected temperature of air-mixed recirculating gas inputted from the temperature detecting means 35(35a), to compute, on the basis of the value of detected temperature, the area of flow channel of air flow rate regulating means (36) allowing the temperature of air-mixed recirculating gas to become a preset target temperature and to control the flow rate regulating means (36) at the value of flow channel area computed.
Description
Technical field
The present invention relates to a kind of combustion control device of stoker type incinerator, imported primary air from dropping into rubbish, trade waste etc. by the below of the charger of incinerated matter, and carry out after the primary combustion combustion chamber above this charger, and second-time burning is carried out at the position above this combustion chamber.
Background technology
Charging type (ス ト one カ formula) incinerator is the incinerator of following formation, it possesses the fire grate of mutual configuration canned paragraph and movable section and the charger that constitutes, by using hydraulic means to make movable section to move back and forth, one side is carried out from the stirring of the rubbish (by incinerated matter) of feeding funnel input and is moved ahead, carry out the drying of rubbish on one side at the dry section that is disposed at this charger upstream side, drop into primary air in next main combustion zone, and lead burning, the ashes burning of the surplus of burning in the ashes combustion zone in downstream.
Patent documentation 1 (speciallyying permit communique No. 3582710) provides a kind of following technology, promptly, in such charger incinerator, the recycle gas that makes a part of having extracted the burnt gas in the combustion chamber on the charger out is back to second-time burning portion in the above-mentioned combustion chamber by re-circulation path, supplies with burning in the lump with auxiliary air.
In the technology that provides by patent documentation 1, the part of the burnt gas in the combustion chamber of extraction charger top is sent in the heat exchanger as recycle gas, in this heat exchanger, make this recycle gas and primary air and auxiliary air carry out heat exchange, this primary air and auxiliary air are carried out preheating, and this recycle gas is cooled off, the recycle gas of this quilt being lowered the temperature by the fan that is disposed at above-mentioned heat exchanger downstream is put into the more upstream side position of the auxiliary air supply port in the above-mentioned combustion chamber, the environmental gas of the more upstream side of auxiliary air supply port is formed the environmental gas of week reduction, total air ratio in the combustion chamber after the auxiliary air supply is controlled at about 1.3, make unburned gas and unburning material carry out completing combustion, and reduce NOx.
Patent documentation 1:(Japan) No. 3582710 communique of special permission
But, in the prior art of above-mentioned patent documentation 1, have following problems.
Promptly, in above-mentioned prior art, the part of the burnt gas in the combustion chamber above extracting charger out and sending in the heat exchanger as recycle gas, after by in this heat exchanger, making primary air and auxiliary air carry out heat exchange this recycle gas being cooled off, utilization is disposed at the more upstream side position that recycle gas that the fan in above-mentioned heat exchanger downstream lowers the temperature this quilt is put into the auxiliary air supply port in the combustion chamber, therefore, need be used for this recycle gas and air (primary air and auxiliary air) carried out heat exchange and make the heat exchanger of sending into fan after its cooling, it is complicated that thereby the structure that causes the burnt gas recirculating system becomes, and, rise because of the number of devices quantitative change makes installation cost more.
In addition, for said fans, lower the temperature, but because the many burning gases of corrosion composition are directly sent into, so the corrosion of fan carries out easily, causes the durability of this fan and life-span to be reduced by above-mentioned heat exchanger.
In order to solve above-described prior art problems, the present inventor has proposed the special invention of being willing to 2005-059846 number (application on March 4th, 2005).
At this in first to file invention, when utilizing fan to make the part of the burnt gas of extracting out in the combustion chamber above charger be back in the combustion chamber by re-circulation path, upstream section at the fan of above-mentioned re-circulation path, to directly be mixed in the recycle gas and import to the fan of recycle gas backflow usefulness by the primary air of burning usefulness or air that the either party in the auxiliary air constitutes, by utilizing this fan that the recycle gas that is made of this mist is back in the combustion chamber, thereby utilize air that burnt gas is lowered the temperature, and, can be by coming dilute combustion waste gas and it imported to fan with Air mixing, thus, do not need such being used for of above-mentioned prior art that recycle gas is cooled off and make the heat exchanger of its cooling, make the designs simplification of burnt gas recirculating system, and reduce constitution equipment quantity, and reduce the installation cost of combustion apparatus.
In addition, at this in first to file invention, be directed to the recycle gas of the fan of recycle gas backflow usefulness, by the air of low temperature cooling and lower the temperature, diluted by this air in addition and reduce burnt gas concentration, and, by utilizing above-mentioned cooling to make the corrosion composition in the waste gas is that salt solidifies, become the recycle gas that has reduced corrosion composition, therefore, the temperature of fan reduces, the thermal stress of this fan diminishes, and, as mentioned above, import to fan by the recycle gas that will reduce corrosion composition, can suppress the corrosion of fan, thus, can not use the heat proof material of high price and obtain the fan of cost degradation, keep needed durability and life-span.
But, above-mentioned in first to file invention, motion is only limited to the mixing of recycle gas in the above-mentioned stoker type incinerator and air (primary air and the auxiliary air of burning usefulness) and to the reflow method that burns the furnace side and be used to carry out such mixing and to the device of the backflow of burning the furnace side, in above-mentioned unexposed recycle gas and the burning control in the incinerator that causes of the backflow of the concrete mixing ratio control of air, air mixing recycle gas etc. to the incinerator side reflux in the first to file invention.
Summary of the invention
The present invention makes in view of such present situation, its purpose is to provide a kind of combustion control device of stoker type incinerator, it can implement via the re-circulation path that possesses recirculation fan to control to the mixing ratio control of air the mixings recycle gas of incinerator side reflux and the burning in the incinerator with high accuracy, by fairly simple and low-cost configuration, can suppress the generation of harmful components such as NOx, CO, and can carry out completing combustion with high burning efficiency.
In order to solve the problem of above-mentioned prior art, the invention of first aspect provides a kind of combustion control device of stoker type incinerator, it constitutes, importing below drop into after primary air and the combustion chamber above this charger carry out primary combustion by the charger of incinerated matter, above this combustion chamber, carry out second-time burning, and, with extracted out the burnt gas in the described combustion chamber a part recycle gas and mix by the air that air flue is supplied with, utilize fan this air mixing recycle gas to be supplied in the stove by re-circulation path, this combustion control device is characterised in that, the both air flow modulation mechanism that air mass flow is regulated is set at described air flue, on the other hand, be provided with: temperature testing organization, its temperature to described air mixing recycle gas detects; The burning controlling organization, its input is from the temperature detection value of the described air mixing recycle gas of described temperature testing organization, the temperature that calculates described air mixing recycle gas based on this temperature detection value reaches the area of passage of the described both air flow modulation mechanism of predefined target temperature, and with described both air flow modulation mechanism controls at described area of passage calculated value.
In addition, the invention of second aspect is in above-mentioned combustion control device, the both air flow modulation mechanism that air mass flow is regulated is set at described air flue, on the other hand, be provided with: gas concentration testing agency, its gas concentration to described air mixing recycle gas detects; The burning controlling organization, its input is from the gas concentration detected value of the described air mixing recycle gas of described gas concentration testing agency, the gas concentration that calculates described air mixing recycle gas based on this gas concentration detected value reaches the area of passage of the described both air flow modulation mechanism of predefined object gas concentration, and with described both air flow modulation mechanism controls at described area of passage calculated value.
The invention of the third aspect is on the basis of second aspect invention, preferably constitute, NOx concentration testing agency that NOx concentration in the described burnt gas is detected and the CO concentration testing agency that the CO concentration in the described burnt gas is detected are set, described burning controlling organization constitutes, based on this gas concentration detected value from the input of described gas concentration testing agency, and based on NOx concentration detected value from the input of described NOx concentration testing agency, and based on CO concentration detected value from the input of described CO concentration testing agency, calculating the NOx concentration that the gas concentration of described air mixing recycle gas reaches in predefined object gas concentration and the described burnt gas reaches below the predefined target NOx concentration, and the CO concentration in the described burnt gas reaches the area of passage of the following described both air flow modulation mechanism of predefined target CO concentration, with described both air flow modulation mechanism controls at described area of passage calculated value.
In addition, the invention of fourth aspect is in above-mentioned combustion control device, the both air flow modulation mechanism that air mass flow is regulated is set at described air flue, on the other hand, be provided with: temperature testing organization, its temperature to described air mixing recycle gas detects; Gas concentration testing agency, its gas concentration to described air mixing recycle gas detects; The burning controlling organization, its input reaches gas concentration detected value from the described air mixing recycle gas of described gas concentration testing agency from the temperature detection value of described air the mixings recycle gas of described temperature testing organization, based on these temperature detection values and gas concentration detected value, the gas concentration that the temperature that calculates described air mixing recycle gas reaches predefined target temperature and described air mixing recycle gas reaches the area of passage of the described both air flow modulation mechanism of predefined object gas concentration, and with described both air flow modulation mechanism controls at described area of passage calculated value.
In addition, the invention of the 5th aspect, in above-mentioned combustion control device, air is being mixed in the described recycle gas and is being fed into the recycle gas path of the air mixing recycle gas circulation of described combustion chamber, be provided with air is mixed the recycle gas flow rate governor motion that recycle gas flow rate is regulated, and, the gas flowmeter that flow to described air mixing recycle gas detects is set, and be provided with the burning controlling organization, it is based on the flow detection value of the air mixing recycle gas of importing from described gas flowmeter, the flow that calculates this air mixing recycle gas reaches the area of passage of the described recycle gas flow rate governor motion of predefined target flow, and described recycle gas flow rate governor motion is controlled at described area of passage calculated value.
The invention of the 6th aspect is on the basis of invention aspect the 5th, preferably constitute, a plurality of positions in described combustion chamber are provided with the recycle gas ejiction opening, and, the ground connection that links to each other with described each recycle gas ejiction opening is provided with a plurality of described recycle gas paths, there is pair air to mix the recycle gas flow rate governor motion that recycle gas flow rate is regulated in described each recycle gas channel setting, with the recycle gas flow rate governor motion chamber pressure testing agency that the pressure to described combustion chamber detects is set accordingly, described burning controlling organization constitutes, based on chamber pressure detected value from a plurality of chamber pressure testing agency, the pressure that calculates a plurality of positions of combustion chamber reaches the area of passage of described each recycle gas flow rate governor motion of predefined goal pressure, and described each recycle gas flow rate governor motion is controlled at described area of passage calculated value.
In the invention of first aspect, utilize combustion control device, temperature detection value based on the air mixing recycle gas that is directed to the recirculation fan of carrying air mixing recycle gas, in the mode that the temperature of this air mixing recycle gas reaches below the predefined maximum allowable temperature aperture of both air flow modulation mechanism is regulated, control is blended into the air capacity in the described air mixing recycle gas, therefore, even it is former thereby cause the temperature of described recycle gas to rise because of some, increase air capacity accordingly by rising, also the temperature that is drawn into the air mixing recycle gas of described recirculation fan can be continued and suitably remain on below the described maximum allowable temperature with this temperature.
Thus, can prevent the overheated of recirculation fan that described air mixing recycle gas causes, this recirculation fan does not need to use the expensive fan that is made of special heat proof material, and can keep high durability.
In the invention of second aspect, utilize the burning controlling organization, gas concentration detected value (preferred oxygen concentration detected value) based on the air mixing recycle gas that imports to recirculation fan, reach predefined with the gas concentration of this air mixing recycle gas and allow that the mode of gas concentration regulates the aperture (area of passage) of both air flow modulation mechanism, the air capacity in the described air mixing recycle gas is sneaked in control, therefore, even if cause for example consuming the oxygen in the recycle gas under the situation that oxygen concentration becomes too small, aperture by increasing described both air flow modulation mechanism to be increasing air capacity, thereby also can carry out the smooth combustion of allowing more than the minimum oxygen concentration described constantly.
In addition, when constituting as described in the third aspect invention, utilize combustion control device that the aperture of both air flow modulation mechanism is regulated, therefore, can respectively the NOx concentration in the burnt gas be remained on constantly and allow below the maximum NOx concentration, CO concentration in the burnt gas remained on allow below the maximum CO concentration, can promote the purification of waste gas.
According to the invention of fourth aspect, obtain the composite effect of first aspect invention and second aspect invention.
That is, in the invention of fourth aspect,
(1) utilizes the burning controlling organization, temperature detection value based on the air mixing recycle gas that imports to recirculation fan, in the mode that the temperature of this air mixing recycle gas reaches below the predefined maximum allowable temperature aperture of described both air flow modulation mechanism is regulated, control is blended into the air capacity in the described air mixing recycle gas, therefore, even it is former thereby cause the temperature of described recycle gas to rise because of some, increase air capacity accordingly by rising, also the temperature that is drawn into the air mixing recycle gas of described recirculation fan can be continued and suitably remain on below the described maximum allowable temperature with this temperature.
Thus, can prevent the overheated of recirculation fan that described air mixing recycle gas causes, this recirculation fan does not need to use the expensive fan that is made of special heat proof material, can keep high durability.
(2) utilize the burning controlling organization, gas concentration detected value (preferred oxygen concentration detected value) based on the air mixing recycle gas that imports to recirculation fan, reaching predefined mode of allowing gas concentration with the gas concentration of this air mixing recycle gas regulates the aperture of described both air flow modulation mechanism, the air capacity in the described air mixing recycle gas is sneaked in control, therefore, even if cause for example consuming the oxygen in the recycle gas under the situation that oxygen concentration becomes too small, aperture by increasing described both air flow modulation mechanism to be increasing air capacity, thereby also can carry out the smooth combustion of allowing more than the minimum oxygen concentration described constantly.
In the invention aspect the 5th, suction path (recycle gas path) in the circulation of air mixing recycle gas is provided with this recycle gas flow rate governor motion that air mixing recycle gas flow rate is regulated, and, flow detection value based on the recycle gas of the gas flowmeter that detects from flow to described air mixing recycle gas, the mode that reaches predefined target flow with the flow of this recycle gas is controlled the recycle gas flow rate governor motion, therefore, the mode that reaches target flow by the flow with recycle gas is controlled the aperture of recycle gas flow rate governor motion, can be with amount as the air mixing recycle gas of auxiliary air, but stably remain on the amount of this air mixing recycle gas completing combustion, thereby the fired state equalization can be kept smooth combustion.
In addition, when constituting as described in the 6th aspect invention, a plurality of positions in the combustion chamber are provided with the recycle gas ejiction opening, corresponding to recycle gas flow rate governor motion in each the recycle gas channel setting that is connected with this recycle gas ejiction opening, chamber pressure testing agency is set, utilize the burning controlling organization that near the recycle gas pressure the recycle gas ejiction opening is detected, use the recirculating gas scale of construction and the proportional relation of recycle gas pressure, control in the mode that this recycle gas pressure reaches object gas pressure, therefore, can regulate the distribution of sneaking into the recirculating gas scale of construction to the air of the recycle gas ejiction opening at a plurality of positions that are arranged at the combustion chamber flexibly and comfortably, thereby the circumferencial direction of combustion chamber equably air supply sneak into recycle gas, can make the burning equalization.
Description of drawings
Fig. 1 is the structure chart of the stoker type incinerator of expression first embodiment of the invention;
Fig. 2 is the summary construction diagram of the combustion control device of above-mentioned first embodiment of expression;
Fig. 3 is the burning control block diagram of above-mentioned first embodiment;
Fig. 4 is the structure chart of the stoker type incinerator of expression second embodiment of the invention;
Fig. 5 is the summary construction diagram of the combustion control device of above-mentioned second embodiment of expression;
Fig. 6 is the burning control block diagram of above-mentioned second embodiment;
Fig. 7 is the structure chart of the stoker type incinerator of expression third embodiment of the invention;
Fig. 8 is the burning control flow chart of above-mentioned the 3rd embodiment;
Fig. 9 is the structure chart of the stoker type incinerator of expression four embodiment of the invention;
Figure 10 is the burning control flow chart of above-mentioned the 4th embodiment.
The specific embodiment
Below, describe the present invention in detail according to illustrated embodiment.
First embodiment
Fig. 1 is the structure chart of the stoker type incinerator of expression first embodiment of the invention, and Fig. 2 is the summary construction diagram of the combustion control device of above-mentioned first embodiment of expression, and Fig. 3 is the burning control block diagram of above-mentioned first embodiment.
Among Fig. 1, Reference numeral 1 is to drop into rubbish or trade waste etc. by the rubbish feeding funnel of incinerated matter, and Reference numeral 2 is stoker type incinerators.Be laid with in this stoker type incinerator 2: at dry section charger 21, the main combustion zone charger 22 of main composition combustion zone and the ashes combustion zone charger 23 of main composition ashes combustion zone from the stove inner bottom part main composition dry section of the input port of rubbish feeding funnel 1.Dry section charger 21 is positioned at upstream side, and main combustion zone charger 22 is positioned at the downstream of dry section charger 21, and ashes combustion zone charger 23 is positioned at downstream in the downstream of main combustion zone charger 22.At this, so-called main combustion zone is meant the zone that the flame that rises burns on waste layer.
Above-mentioned each charger 21,22,23 possesses the travelling grate that is disposed between the dead grate, reciprocating motion by this travelling grate drops into rubbish (by incinerated matter) afterwards, carry out drying at 21 pairs of these rubbish of charger, lead burning at charger 22, at last, carry out the ashes burning at charger 23.In addition, in this embodiment, above-mentioned main combustion zone charger has 3, as long as but one or more is set.Reference numeral 8 is ashes feeders.
In addition, above above-mentioned charger 21,22,23, be provided with primary zone 3, and then be provided with secondary combustion chamber 4 above it.
Dispose primary air pipe 51,52 (three), 53 at dry section charger 21, combustion zone charger 22 and ashes combustion zone charger 23, supply with primary air from this primary air pipe at separately bottom bellows opening.Reference numeral 6 is supplied with the fan of usefulness for primary air, Reference numeral 5 is that the primary air that this fan 6 and each primary air pipe 51,52 (three), 53 are connected respectively is responsible for, and the primary air that comes from fan 6 force feeds is assigned to primary air pipe 51,52,53 from the primary air person in charge 5.Be provided with the switching flashboard (ダ Application パ) 54,55,56 that they are opened and closed respectively at primary air pipe 51,52,53.In addition, be responsible for 5 at primary air and be provided with the switching flashboard 7 that it is opened and closed.
Above-mentioned air flashboard 30a constitutes can receive from the control signal of aftermentioned burning controlling organization 60 and regulates aperture (Flow-rate adjustment) automatically, and constitute, by regulating the aperture of this air flashboard 30a, regulate the flow of the primary air of the entrained air path 30 of flowing through, to by mist path 14, cyclone 12 and suck path 31 import to the recycle gas of recirculation fan 13 and primary air mist, be that the recycle gas of air mixing recycle gas and the mixed proportion of primary air are regulated.
And, the mixed air mixing of the primary air recycle gas that is sent to re-circulation path 15 by recirculation fan 13 is branched to two re-circulation path 17,18, be admitted to two row recycle gas jetting nozzle 19a, the 19c of a side from the re-circulation path 17 of a side, be admitted to two row recycle gas jetting nozzle 19b, the 19d of opposite side from the re-circulation path 18 of opposite side, it is ejected in the secondary combustion chamber 4 from recycle gas jetting nozzle 19a, 19c and 19b, 19d.In addition, in re-circulation path 17, be provided with the branch road gas flashboard B33 that it is opened and closed, in re-circulation path 18, be provided with the branch road gas flashboard A32 that it is opened and closed.
The stoker type incinerator 2 of first embodiment of the invention possesses burning controlling organization 60, this burning controlling organization 60 and temperature sensor 35 (comprising 35a), air flashboard 30a and air flashboard aperture detector 36 are electrically connected, temperature detection value from the above-mentioned air mixing recycle gas of temperature sensor 35 inputs, and, aperture detected value from air flashboard aperture detector 36 input air flashboard 30a, regulate the aperture of air flashboard 30a based on such detected value, so that the temperature of above-mentioned air mixing recycle gas reaches target temperature, the recycle gas in the above-mentioned air mixing recycle gas and the mixed proportion of primary air are controlled at the target mixed proportion.
When 2 runnings of such stoker type incinerator, to in the combustion chamber (primary zone 3 or secondary combustion chamber 4) of charger top, extract the part of mouthful 40 burnt gas of extracting out out as recycle gas by recycle gas, mix with primary air by re-circulation path 16 from entrained air path 30, and by mist path 14, cyclone 12 and suck path 31 and import to recirculation fan 13.
And, the mixed air mixing of the primary air recycle gas that is sent to re-circulation path 15 by recirculation fan 13 is branched to two re-circulation path 17,18, and be fed to recycle gas jetting nozzle 19a, the 19c of a side and recycle gas jetting nozzle 19b, the 19d of opposite side respectively, be ejected in the secondary combustion chamber 4 from recycle gas jetting nozzle 19a, 19c and 19b, 19d.
Thus, the recycle gas that can utilize primary air to be made of the part of burnt gas is lowered the temperature, and can by with mixing of this primary air with burnt gas dilution and import to recirculation fan 13.
The burning controlling organization and the burning control operation of this first embodiment then, are described based on Fig. 2 and Fig. 3.
The burning controlling organization 60 of present embodiment possesses: gas temperature comparing section 61, reference gas temperature setting portion 62, gas temperature/air capacity configuration part 63, air capacity regulated quantity calculating part 64, air flashboard aperture regulated quantity calculating part 65 and air flashboard aperture calculating part 66 are imported into the gas temperature comparing section 61 of this burning controlling organization 60 by the temperature detection value of temperature sensor 35 detected air mixing recycle gas.In reference gas temperature setting portion 62, be set with the maximum allowable temperature (preferred about 300 ℃) of the above-mentioned air mixing recycle gas that is fed to above-mentioned recirculation fan 13.
In addition, in gas temperature comparing section 61, calculate temperature detection value and the temperature deviation that is set in the maximum allowable temperature of reference gas temperature setting portion 62 from the air mixing recycle gas of temperature sensor 35.
Then, calculate the aperture of the air flashboard 30a that calculates by air flashboard aperture calculation mechanism shown in Figure 2 600 by following order.
In Fig. 3, will be input to air capacity regulated quantity calculating part 64 from the calculated value of the temperature deviation of gas temperature comparing section 61.
In gas temperature/air capacity configuration part 63, preestablish the air capacity of the air of supplying with by entrained air path 30 and above-mentioned air and relation from the mixed above-mentioned air mixing recycle gas temperature of the recycle gas of re-circulation path 16 according to experimental result or analog computation.
In addition, at air capacity regulated quantity calculating part 64, calculate (extraction) and the corresponding air capacity deviation of calculated value by above-mentioned gas temperature/air capacity configuration part 63, and it is outputed to air flashboard aperture regulated quantity calculating part 65 from the said temperature deviation of gas temperature comparing section 61.At air flashboard aperture regulated quantity calculating part 65, aperture characteristic as above-mentioned air flashboard 30a, the relation of setting air amount and air flashboard aperture, at this air flashboard aperture regulated quantity calculating part 65, calculate with from the corresponding air flashboard of the air capacity deviation calculated value aperture regulated quantity of air capacity regulated quantity calculating part 64, and be entered into air flashboard aperture calculating part 66.
At this air flashboard aperture calculating part 66, to carry out add operation or subtraction from the air flashboard aperture regulated quantity of above-mentioned air flashboard aperture regulated quantity calculating part 65 and aperture detected value from the air flashboard 30a of above-mentioned air flashboard aperture detector 36 inputs, the desired value of calculating air flashboard aperture promptly with the corresponding air flashboard of said reference gas temperature aperture, above-mentioned air flashboard 30a is controlled at this target aperture.
Like this, in the combustion control device of the stoker type incinerator 2 of first embodiment, utilize burning controlling organization 60, temperature detection value based on the air mixing recycle gas by above-mentioned recirculation fan 13, regulate air flashboard 30a aperture so that the temperature of this air mixing recycle gas reach below the predefined maximum allowable temperature, and control is blended into the air capacity in the above-mentioned air mixing recycle gas, therefore, even it is former thereby cause the temperature of above-mentioned recycle gas to rise because of some, increase air capacity accordingly by rising, also the temperature that is drawn into the air mixing recycle gas of above-mentioned recirculation fan 13 can be continued and suitably remain on below the above-mentioned maximum allowable temperature with this temperature.
Thus, can prevent the overheated of recirculation fan 13 that above-mentioned air mixing recycle gas causes, this recirculation fan 13 does not need to use the expensive fan that is made of special heat proof material, and can keep high durability.
Second embodiment
Fig. 4 is the structure chart of the stoker type incinerator of expression second embodiment of the invention, and Fig. 5 is the summary construction diagram of the burning controlling organization of above-mentioned second embodiment of expression, and Fig. 6 is the burning control block diagram of above-mentioned second embodiment.
In second embodiment of the invention, detect and utilize this gas concentration to control in the mechanism of aperture of air flashboard 30a in gas concentration above-mentioned air mixing recycle gas, use oxygen concentration as gas concentration.In addition, can also substitute this oxygen concentration and use CO
2Concentration Deng other composition in the air mixing recycle gas.
Promptly, as shown in Figure 4, in the stoker type incinerator 2 of second embodiment of the invention, be provided with: the oxygen densitometer 37 (perhaps oxygen densitometer 37a) that the oxygen concentration in the air mixing recycle gas is detected, the NOx concentration sensor 38 that the NOx concentration in the burnt gas of above-mentioned secondary combustion chamber 4 outlet sides is detected, the CO concentration sensor 39 that CO concentration is detected.
And, as Fig. 5 and shown in Figure 6, the burning controlling organization 60 of present embodiment possesses: oxygen concentration comparing section 71, benchmark oxygen concentration configuration part 72, NOx concentration comparing section 73, benchmark NOx concentration configuration part 74, CO concentration comparing section 75, benchmark CO concentration configuration part 76, air capacity regulated quantity calculating part 77, oxygen concentration/air capacity configuration part 78, air capacity regulated quantity calculating part 79, NOx concentration/air capacity configuration part 80, air capacity regulated quantity calculating part 81, CO concentration/air capacity configuration part 82, air flashboard aperture regulated quantity calculating part 65 and air flashboard aperture calculating part 66, this burning controlling organization 60 is based on the oxygen concentration detected value from oxygen densitometer 37, the oxygen concentration of calculating above-mentioned air mixing recycle gas reaches the aperture of the air flashboard 30a of predefined aimed oxygen concn, and the aperture of air flashboard 30a is controlled at this aperture calculated value.
In addition, burning controlling organization 60 is based on from the NOx concentration detected value of NOx concentration sensor 38 and from the CO concentration detected value of CO concentration sensor 39, calculate NOx concentration in the above-mentioned burnt gas and reach the aperture that CO concentration in the following and above-mentioned burnt gas of predefined target NOx concentration reaches the following air flashboard 30a of predefined target CO concentration, and the aperture of air flashboard 30a is controlled at this aperture calculated value.
Then, based on Fig. 5 and Fig. 6 the burning controlling organization of second embodiment of the invention and the control sequence of burning are described.
Among Fig. 5, with in this second embodiment based on oxygen concentration detected value from oxygen densitometer 37 (37a), the order of utilizing air flashboard aperture calculation mechanism 600 to calculate the aperture of air flashboard 30a puts forward and represents, following action specification describes also used the NOx concentration in the burnt gas and the burning control of CO concentration except that above-mentioned oxygen concentration with reference to Fig. 6.
Among Fig. 6, will be input to the oxygen concentration comparing section 71 of burning controlling organization 60 by the oxygen concentration detected value of the detected above-mentioned air mixing recycle gas of oxygen densitometer 37 (perhaps oxygen densitometer 37a).In addition, will be input to the NOx concentration comparing section 73 of burning controlling organization 60 by the NOx concentration detected value in the NOx concentration sensor 38 detected burnt gas.And will be input to the CO concentration comparing section 75 of burning controlling organization 60 by the CO concentration detected value in the CO concentration sensor 39 detected burnt gas.
In benchmark oxygen concentration configuration part 72, set the minimum oxygen concentration of allowing of the above-mentioned air mixing recycle gas be fed to recirculation fan 13.In benchmark NOx concentration configuration part 74, set the maximum NOx concentration of allowing in the above-mentioned burnt gas.In benchmark CO concentration configuration part 76, set the maximum CO concentration of allowing in the above-mentioned burnt gas.
In oxygen concentration comparing section 71, calculate the oxygen concentration detected value in the air mixing recycle gas of oxygen densitometer 37 and be set in the oxygen concentration deviation of allowing minimum oxygen concentration of benchmark oxygen concentration configuration part 72, and be entered into air capacity regulated quantity calculating part 77.
In addition, in NOx concentration comparing section 73, calculate the NOx concentration detected value in the burnt gas of NOx concentration sensor 38 and be set in the NOx concentration deviation of allowing maximum NOx concentration of benchmark NOx concentration configuration part 74, and be entered into air capacity regulated quantity calculating part 79.
In addition, in CO concentration comparing section 75, calculate the CO concentration detected value in the burnt gas of CO concentration sensor 39 and be set in the CO concentration deviation of allowing maximum CO concentration of benchmark CO concentration configuration part 76, and be entered into air capacity regulated quantity calculating part 81.
Then, in oxygen concentration/air capacity configuration part 78, preestablish the air capacity of the air of supplying with by entrained air path 30 and above-mentioned air and relation from the oxygen concentration in the mixed above-mentioned air mixing recycle gas of the recycle gas of re-circulation path 16 according to experimental result or analog computation.
In addition, in NOx concentration/air capacity configuration part 80, preestablish the air capacity of the air of supplying with by entrained air path 30 and the relation of the NOx concentration in the above-mentioned burnt gas according to experimental result or analog computation.
And,, preestablish the air capacity of the air of supplying with by entrained air path 30 and the relation of the CO concentration in the above-mentioned burnt gas according to experimental result or analog computation in CO concentration/air capacity configuration part 82.
And, at air capacity regulated quantity calculating part 77, calculate (extraction) and the corresponding air capacity deviation of calculated value by oxygen concentration/air capacity configuration part 78, and be entered into air flashboard aperture regulated quantity calculating part 65 from the above-mentioned oxygen concentration deviation of oxygen concentration comparing section 71.
In addition, at air capacity regulated quantity calculating part 79, calculate (extraction) and the corresponding air capacity deviation of calculated value by NOx concentration/air capacity configuration part 80, and be entered into air flashboard aperture regulated quantity calculating part 65 from the above-mentioned NOx concentration deviation of NOx concentration comparing section 73.
And, at air capacity regulated quantity calculating part 81, calculate (extraction) and the corresponding air capacity deviation of calculated value by CO concentration/air capacity configuration part 82, and be entered into air flashboard aperture regulated quantity calculating part 65 from the above-mentioned CO concentration deviation of CO concentration comparing section 75.
At air flashboard aperture regulated quantity calculating part 65, as the aperture characteristic of air flashboard 30a and the relation of setting air amount and air flashboard aperture, at this air flashboard aperture regulated quantity calculating part 65, calculate successively based on the air flashboard aperture regulated quantity of the corresponding air capacity deviation of above-mentioned oxygen concentration deviation, based on the air flashboard aperture regulated quantity of the corresponding air capacity deviation of above-mentioned NOx concentration deviation, with based on the air flashboard aperture regulated quantity of the corresponding air capacity deviation of above-mentioned CO concentration deviation, from above-mentioned air flashboard aperture regulated quantity, select optimal air flashboard aperture regulated quantity, be entered into air flashboard aperture calculating part 66.
And, at air flashboard aperture calculating part 66, to carry out add operation or subtraction from the air flashboard aperture regulated quantity of air flashboard aperture regulated quantity calculating part 65 and aperture detected value from the air flashboard 30a of air flashboard aperture detector 36 inputs, the aperture of the air flashboard 30a that the desired value that calculates air flashboard aperture promptly adapts with said reference oxygen concentration or said reference NOx concentration or said reference CO concentration, and air flashboard 30a is controlled at this target aperture.
Other structure is identical with above-mentioned first embodiment, and the parts identical with it are represented by same Reference numeral.
Like this, in the combustion control device of the stoker type incinerator 2 of second embodiment, utilize burning controlling organization 60, oxygen concentration detected value based on the air mixing recycle gas that imports to above-mentioned recirculation fan 13, reach predefined with the oxygen concentration of this air mixing recycle gas and allow that the mode more than the minimum oxygen concentration regulates the aperture of air flashboard 30a, thereby control is blended into the air capacity of above-mentioned air mixing recycle gas, therefore, even if cause for example consuming the oxygen in the recycle gas under the situation that oxygen concentration becomes too small, aperture by increasing air flashboard 30a to be increasing air capacity, thereby also can carry out the smooth combustion of allowing more than the minimum oxygen concentration above-mentioned constantly.
In addition, by the aperture of utilizing burning controlling organization 60 to regulate air flashboard 30a, can respectively the NOx concentration in the burnt gas be remained on constantly and allow below the maximum NOx concentration, in addition the CO concentration in the burnt gas is remained on and allow below the maximum CO concentration, can promote the purification of waste gas.
The 3rd embodiment
Fig. 7 is the structure chart of stoker type incinerator of expression third embodiment of the invention, and Fig. 8 is the flow chart of the burning control extraction that will be undertaken by the temperature of the oxygen concentration of above-mentioned the 3rd embodiment and air mixings recycle gas.
The 3rd embodiment of the present invention is with second embodiment combination of first embodiment of Fig. 1～shown in Figure 3 and Fig. 4～shown in Figure 6 and constitute.
Promptly, in the 3rd embodiment, utilize burning controlling organization 60, temperature detection value based on the air mixing recycle gas of temperature sensor 35a (perhaps also can be the temperature sensor 35 of Fig. 1), temperature with this air mixing recycle gas reaches the aperture that the mode below the predefined maximum allowable temperature is regulated air flashboard 30a, and control is blended into the air capacity of above-mentioned air mixing recycle gas, and, oxygen concentration detected value based on the oxygen densitometer 37 that the oxygen concentration in the above-mentioned air mixing recycle gas is detected, the oxygen concentration of calculating above-mentioned air mixing recycle gas reaches predefined aperture of allowing the above space-time air-lock of minimum oxygen concentration plate 30a, and the aperture of air flashboard 30a is controlled at this aperture calculated value.
In addition, in the 3rd embodiment, similarly be provided with above-mentioned second embodiment: the NOx concentration sensor 38 that the NOx concentration in the burnt gas of secondary combustion chamber 4 outlet sides is detected, the CO concentration sensor 39 that CO concentration is detected, based on from the NOx concentration detected value of NOx concentration sensor 38 and from the CO concentration detected value of CO concentration sensor 39, the NOx concentration that calculates in the above-mentioned burnt gas can reach below the predefined target NOx concentration, and the CO concentration in the burnt gas can reach the aperture of the following air flashboard 30a of predefined target CO concentration, and the aperture of air flashboard 30a is controlled at this aperture calculated value.
Other structure is identical with above-mentioned first embodiment, and the parts identical with it are represented by same Reference numeral.
Fig. 8 represents and will control the flow chart of extracting out by the burning that the temperature of oxygen concentration in aforesaid the 3rd embodiment and air mixing recycle gas is carried out that this burning control is undertaken by following such order.
Promptly, utilize the oxygen concentration Cg of 37 pairs of air mixing of oxygen densitometer recycle gas to detect (step (1)), this oxygen concentration detected value Cg and aimed oxygen concn Cgo are compared (step (2)), under the oxygen concentration Cg situation bigger than aimed oxygen concn Cgo (Cg＞Cgo), close air flashboard 30a to reduce air capacity (step (3)), (Cg＜Cgo), open air flashboard 30a under the oxygen concentration Cg situation littler to increase air capacity (step (4)) than aimed oxygen concn Cgo.
Then, the then aperture control of the air flashboard 30a that is undertaken by this oxygen concentration is carried out the aperture of the air flashboard 30a that undertaken by the temperature of air mixings recycle gas in the following order and is controlled.
Promptly, among Fig. 8, utilize temperature sensor 35a (perhaps also can be the temperature sensor 35 of Fig. 1) that the temperature T g of air mixing recycle gas is detected (step (5)), this temperature detection value Tg and target temperature Tgo are compared (step (6)), when temperature detection value Tg is consistent with target temperature Tgo, the aperture of air flashboard 30a is kept present situation, under the temperature detection value Tg situation higher than target temperature Tgo (Tg＞Tgo), open air flashboard 30a to increase air capacity, make the temperature T g decline (step (7)) of air gas mixture recycle gas, under the temperature detection value Tg situation lower than target temperature Tgo (Tg＜Tgo), close air flashboard 30a to reduce air capacity, make the temperature T g rising (step (8)) of air mixing recycle gas.
According to the 3rd embodiment of the present invention, can obtain the composite effect of above-mentioned first embodiment and second embodiment.
That is, in the combustion control device of the stoker type incinerator 2 of the 3rd embodiment,
(1) utilizes combustion control device 60, temperature detection value based on the air mixing recycle gas that imports to recirculation fan 13, in the mode that the temperature of this air mixing recycle gas reaches below the predefined maximum allowable temperature aperture of air flashboard 30a is regulated, control is blended into the air capacity in the above-mentioned air mixing recycle gas, therefore, even it is former thereby cause the temperature of above-mentioned recycle gas to rise because of some, increase air capacity accordingly by rising, also the temperature that is drawn into the air mixing recycle gas of above-mentioned recirculation fan 13 can be continued and suitably remain on below the above-mentioned maximum allowable temperature with this temperature.
Thus, can prevent the overheated of recirculation fan 13 that above-mentioned air mixing recycle gas causes, this recirculation fan 13 does not need to use the expensive fan that is made of special heat proof material, can keep high durability.
(2) utilize burning controlling organization 60, oxygen concentration detected value based on the air mixing recycle gas that imports to recirculation fan 13, reach predefined with the oxygen concentration of this air mixing recycle gas and allow that the mode more than the minimum oxygen concentration regulates the aperture of air flashboard 30a, control is blended into the air capacity in the above-mentioned air mixing recycle gas, therefore, even if cause for example consuming the oxygen in the recycle gas under the situation that oxygen concentration becomes too small, aperture by increasing air flashboard 30a to be increasing air capacity, thereby also can carry out the smooth combustion of allowing more than the minimum oxygen concentration above-mentioned constantly.
In addition, by the aperture of utilizing burning controlling organization 60 to regulate air flashboard 30a, can respectively the NOx concentration in the burnt gas be remained on constantly and allow below the maximum NOx concentration, in addition the CO concentration in the burnt gas is remained on and allow below the maximum CO concentration, thereby can promote the purification of waste gas.
The 4th embodiment
Fig. 9 is the structure chart of the stoker type incinerator of expression four embodiment of the invention, and Figure 10 is the burning control flow chart of above-mentioned the 4th embodiment.
In the four embodiment of the invention, on the basis of above-mentioned the 3rd embodiment, supply to the suction path (recycle gas path) 31 of the air mixing recycle gas circulation of secondary combustion chamber 4 air being mixed in the recycle gas, be provided with the gas flashboard 013 that the air gas mixture recycle gas flow rate is regulated, and, the flow that utilization is arranged at 90 pairs of air mixing of mixed gas flowmeter recycle gas of re-circulation path 15 detects, utilize burning controlling organization 60, based on the flow detection value from the air mixing recycle gas of above-mentioned gas flowmeter, the mode that reaches predefined target flow with the flow of this recycle gas is controlled the aperture of gas flashboard 013.
That is, the step among Figure 10 (1)～(8) are identical with the situation of above-mentioned the 3rd embodiment shown in Figure 8.
Among Figure 10, utilize 60 couples of flow detection value Qg and predefined target flow Qgo of burning controlling organization to compare (step (9)) from the air mixing recycle gas of mixed gas flowmeter 90.When above-mentioned flow detection value Qg is bigger than target flow Qgo (Qg＞Qgo), close (being to reduce aperture strictly speaking) gas flashboard 013 (step (10)), at above-mentioned flow detection value Qg than target flow Qgo hour (Qg＜Qgo), open (being to increase aperture strictly speaking) gas flashboard 013 (step (11)), the flow of control air mixing recycle gas is so that it reaches target flow.
Therefore, the mode that reaches target flow Qgo by the flow Qg with recycle gas is controlled the aperture of gas flashboard 013, amount as the air mixing recycle gas of auxiliary air stably can be remained on the amount that this air mixing recycle gas can completing combustion, thereby can make fired state evenly keep smooth combustion.
In addition, in the four embodiment of the invention, be relatively set with recycle gas jetting nozzle 19a at a plurality of positions of secondary combustion chamber about 4,19c and recycle gas jetting nozzle 19b, 19d, with these recycle gas jetting nozzles 19a, 19c and recycle gas jetting nozzle 19b, each recycle gas path 17 that 19d connects, 18, be provided with air is mixed branch road gas flashboard B33 and the branch road gas flashboard A32 that recycle gas flow rate is regulated, and, the recycle gas jetting nozzle 19a of the air mixing recycle gas in secondary combustion chamber 4,19c and recycle gas jetting nozzle 19b, near the 19d, be provided with gas pressure sensor B42 and gas pressure sensor A41 that the pressure (hereinafter referred to as recycle gas pressure) to them detects.
The 4th embodiment like this constitutes, utilize burning controlling organization 60, based on (two positions, left side, a plurality of positions of coming comfortable secondary combustion chamber about 4, two positions, right side) detected value of gas pressure sensor B42 that is oppositely arranged and the above-mentioned gas pressure of gas pressure sensor A41, the gas pressure that calculates above-mentioned a plurality of positions reaches the aperture of each the branch road gas flashboard B33 and the branch road gas flashboard A32 of predefined goal pressure, and it is controlled at the aperture calculated value of each branch road gas flashboard B33 and branch road gas flashboard A32.
That is, among Figure 10, utilize gas pressure detected value Pg and the predefined object gas pressure P go of burning 60 couples of gas pressure sensor B42 of controlling organization and gas pressure sensor A41 to compare (step among Figure 10 (12)).When above-mentioned gas detected pressure value Pg is bigger than object gas pressure P go (Pg＞Pgo), close (being to reduce aperture strictly speaking) branch road gas flashboard B33 and branch road gas flashboard A32 (step (13)), sneak into the recirculating gas scale of construction to the air of recycle gas jetting nozzle 19a, 19c and recycle gas jetting nozzle 19b, 19d to reduce.
At above-mentioned gas detected pressure value Pg than object gas pressure P go hour (Pg＜Pgo), open (being to increase aperture strictly speaking) branch road gas flashboard B33 and branch road gas flashboard A32 (step (14)), sneak into the recirculating gas scale of construction to the air of recycle gas jetting nozzle 19a, 19c and recycle gas jetting nozzle 19b, 19d to increase.
Because the combustion control device of the stoker type incinerator 2 of the 4th embodiment constitutes as mentioned above, therefore, use the recirculating gas scale of construction and the proportional relation of recycle gas pressure that near the recycle gas pressure the recycle gas jetting nozzle is detected, the mode that reaches object gas pressure P go with this recycle gas pressure P g is controlled the aperture of above-mentioned branch road gas flashboard B33 and branch road gas flashboard A32, thus, but the amount as the air mixing recycle gas of auxiliary air stably can be remained on the amount of this air mixing recycle gas completing combustion, thereby can make fired state evenly keep smooth combustion.
In addition, based on (two positions, left side, a plurality of positions of coming comfortable secondary combustion chamber about 4, two positions, right side) detected value of gas pressure sensor B42 that is oppositely arranged and the above-mentioned gas pressure of gas pressure sensor A41, the mode that reaches predefined goal pressure with the gas pressure at above-mentioned a plurality of positions calculates the aperture of each branch road gas flashboard B33 and branch road flashboard A32, and it is controlled at the aperture calculated value of each branch road gas flashboard B33 and branch road gas flashboard A32, therefore, can regulate recycle gas jetting nozzle 19a flexibly and comfortably to a plurality of positions that are arranged at secondary combustion chamber 4,19c and recycle gas jetting nozzle 19b, the air of 19d is sneaked into the distribution of the recirculating gas scale of construction, thereby the circumferencial direction of combustion chamber equably air supply sneak into recycle gas, can make the burning equalization.
More than narrated embodiments of the present invention, but the embodiment that the invention is not restricted to narrate can carry out various distortion and change based on technological thought of the present invention.
Claims (3)
1. the combustion control device of a stoker type incinerator; It constitutes; Importing below drop into by the charger of incinerated matter after primary air and the combustion chamber above this charger carry out primary combustion; Above this combustion chamber, carry out second-time burning; And; With extracted out the burnt gas in the described combustion chamber a part recycle gas and mix by the air that air flue is supplied with; Utilize fan by re-circulation path this air mixing recycle gas to be supplied in the stove; This combustion control device is characterised in that
At described air flue the both air flow modulation mechanism that air mass flow is regulated is set, on the other hand, is provided with: gas concentration testing agency, its gas concentration to described air mixing recycle gas detects; The burning controlling organization, its input is from the gas concentration detected value of the described air mixing recycle gas of described gas concentration testing agency, the gas concentration that calculates described air mixing recycle gas based on this gas concentration detected value reaches the area of passage of the described both air flow modulation mechanism of predefined object gas concentration, and with described both air flow modulation mechanism controls at described area of passage calculated value
NOx concentration testing agency that NOx concentration in the described burnt gas is detected and the CO concentration testing agency that the CO concentration in the described burnt gas is detected are set, described burning controlling organization constitutes, based on this gas concentration detected value from the input of described gas concentration testing agency, and based on NOx concentration detected value from the input of described NOx concentration testing agency, and based on CO concentration detected value from the input of described CO concentration testing agency, calculating the NOx concentration that the gas concentration of described air mixing recycle gas reaches in predefined object gas concentration and the described burnt gas reaches below the predefined target NOx concentration, and the CO concentration in the described burnt gas reaches the area of passage of the following described both air flow modulation mechanism of predefined target CO concentration, with described both air flow modulation mechanism controls at described area of passage calculated value.
2. the combustion control device of a stoker type incinerator; It constitutes; Importing below drop into by the charger of incinerated matter after primary air and the combustion chamber above this charger carry out primary combustion; Above this combustion chamber, carry out second-time burning; And; With extracted out the burnt gas in the described combustion chamber a part recycle gas and mix by the air that air flue is supplied with; Utilize fan by re-circulation path this air mixing recycle gas to be supplied in the stove; This combustion control device is characterised in that
Be provided with the both air flow modulation mechanism that air mass flow is regulated at described air flue, on the other hand, be provided with: temperature testing organization, its temperature to described air mixing recycle gas detects; Gas concentration testing agency, its gas concentration to described air mixing recycle gas detects; The burning controlling organization, its input reaches gas concentration detected value from the described air mixing recycle gas of described gas concentration testing agency from the temperature detection value of described air the mixings recycle gas of described temperature testing organization, based on these temperature detection values and gas concentration detected value, the gas concentration that the temperature that calculates described air mixing recycle gas reaches predefined target temperature and described air mixing recycle gas reaches the area of passage of the described both air flow modulation mechanism of predefined object gas concentration, and with described both air flow modulation mechanism controls at described area of passage calculated value
NOx concentration testing agency that NOx concentration in the described burnt gas is detected and the CO concentration testing agency that the CO concentration in the described burnt gas is detected are set, described burning controlling organization constitutes, based on this gas concentration detected value from the input of described gas concentration testing agency, and based on NOx concentration detected value from the input of described NOx concentration testing agency, and based on CO concentration detected value from the input of described CO concentration testing agency, calculating the NOx concentration that the gas concentration of described air mixing recycle gas reaches in predefined object gas concentration and the described burnt gas reaches below the predefined target NOx concentration, and the CO concentration in the described burnt gas reaches the area of passage of the following described both air flow modulation mechanism of predefined target CO concentration, with described both air flow modulation mechanism controls at described area of passage calculated value.
3. the combustion control device of a stoker type incinerator; It constitutes; Importing below drop into by the charger of incinerated matter after primary air and the combustion chamber above this charger carry out primary combustion; Above this combustion chamber, carry out second-time burning; And; With extracted out the burnt gas in the described combustion chamber a part recycle gas and mix by the air that air flue is supplied with; Utilize fan by re-circulation path this air mixing recycle gas to be supplied in the stove; This combustion control device is characterised in that
Air is being mixed in the described recycle gas and is being fed into the recycle gas path of the air mixing recycle gas circulation of described combustion chamber, be provided with air is mixed the recycle gas flow rate governor motion that recycle gas flow rate is regulated, and, the gas flowmeter that flow to described air mixing recycle gas detects is set, and be provided with the burning controlling organization, it is based on the flow detection value of the air mixing recycle gas of importing from described gas flowmeter, the flow that calculates this air mixing recycle gas reaches the area of passage of the described recycle gas flow rate governor motion of predefined target flow, and described recycle gas flow rate governor motion is controlled at described area of passage calculated value
A plurality of positions in described combustion chamber are provided with the recycle gas ejiction opening, and, the ground connection that links to each other with described each recycle gas ejiction opening is provided with a plurality of described recycle gas paths, there is pair air to mix the recycle gas flow rate governor motion that recycle gas flow rate is regulated in described each recycle gas channel setting, with the recycle gas flow rate governor motion chamber pressure testing agency that the pressure to described combustion chamber detects is set accordingly, described burning controlling organization constitutes, based on chamber pressure detected value from a plurality of chamber pressure testing agency, the pressure that calculates a plurality of positions of combustion chamber reaches the area of passage of described each recycle gas flow rate governor motion of predefined goal pressure, and described each recycle gas flow rate governor motion is controlled at described area of passage calculated value.
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| JP2006279629A JP5013808B2 (en) | 2006-10-13 | 2006-10-13 | Combustion control device for stoker-type incinerator |
| JP279629/2006 | 2006-10-13 | ||
| PCT/JP2007/051956 WO2008044341A1 (en) | 2006-10-13 | 2007-02-06 | Combustion control unit for stoker-fired combustion furnace |
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| CN101501399B true CN101501399B (en) | 2011-07-27 |
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| JP5358234B2 (en) * | 2009-03-23 | 2013-12-04 | 三菱重工環境・化学エンジニアリング株式会社 | Stoker-type incinerator and operation method thereof |
| US20110045422A1 (en) * | 2009-08-21 | 2011-02-24 | Alstom Technology Ltd | Optical flue gas monitor and control |
| JP6791811B2 (en) * | 2017-06-27 | 2020-11-25 | 川崎重工業株式会社 | Gas supply structure for secondary combustion and waste incinerator |
| JP6887917B2 (en) * | 2017-08-29 | 2021-06-16 | 川崎重工業株式会社 | Incinerator plant |
| JP6450987B1 (en) * | 2018-08-30 | 2019-01-16 | 三菱重工環境・化学エンジニアリング株式会社 | Stalker furnace |
| KR102516434B1 (en) * | 2021-04-09 | 2023-04-03 | 주식회사 대경에스코 | Combustion Device Improves FGR Efficiency |
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| CN1777776A (en) * | 2003-04-18 | 2006-05-24 | 杰富意工程株式会社 | Grate type waste incinerator and method of controlling combustion of same |
| CN1828139A (en) * | 2005-03-04 | 2006-09-06 | 三菱重工业株式会社 | Refuelling machine type incinerator and its operation method |
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| JP2002349826A (en) * | 2001-05-22 | 2002-12-04 | Mitsubishi Heavy Ind Ltd | Control method and controlling device for pressure in wide box in waste incinerator |
| JP3936884B2 (en) * | 2002-05-15 | 2007-06-27 | 株式会社タクマ | Control method of stoker type incinerator |
| JP4292126B2 (en) * | 2004-08-27 | 2009-07-08 | 株式会社タクマ | Combustion information monitoring and control system for stoker-type waste incinerator |
| JP4293998B2 (en) * | 2005-03-08 | 2009-07-08 | 株式会社タクマ | Incineration facility monitoring system |
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| CN1777776A (en) * | 2003-04-18 | 2006-05-24 | 杰富意工程株式会社 | Grate type waste incinerator and method of controlling combustion of same |
| CN1828139A (en) * | 2005-03-04 | 2006-09-06 | 三菱重工业株式会社 | Refuelling machine type incinerator and its operation method |
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| WO2008044341A1 (en) | 2008-04-17 |
| KR20090029804A (en) | 2009-03-23 |
| JP5013808B2 (en) | 2012-08-29 |
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| CN101501399A (en) | 2009-08-05 |
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