CN103216835B - One way of life incinerator automatic combustion oxygen content of smoke gas control system - Google Patents
One way of life incinerator automatic combustion oxygen content of smoke gas control system Download PDFInfo
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Abstract
The present invention relates to field of household garbage incineration, especially for about syllogic stoker fired grate formula domestic waste incineration automatic combustion oxygen content of smoke gas control system.Measuring flue gas oxygen content by installing oxygen content measurement instrument in economizer exit, according to the deviation of setting value with measured value, if the flue gas oxygen content of measurement is higher, now reducing the flow of Secondary Air and the wind flow of burn-out grate section; If oxygen content is on the low side, increase the flow of Secondary Air and the wind flow of burn-out grate section.Realize on the low side at MSW heating value, during calorific value change, incinerator can regulate and stable operation automatically, improves incinerator automatic combustion and controls, significantly reduce the target of the working strength of operations staff.
Description
The present patent application is application number is 201210495704.1, and the applying date is on November 28th, 2012, and title is the divisional application of one way of life incinerator automatic combustion control system.
Technical field
The present invention relates to field of household garbage incineration, especially for the automatic combustion control method about syllogic stoker fired grate formula domestic waste incineration.
Background technology
The domestic waste complicated component of current China, calorific value is lower, cause incinerator combustion conditions unstable, most domestic incineration plant every platform incinerator is all equipped with full-time operating personnel, control relevant each equipment major part with waste incineration and all operate in manual operation mode, the stable operation of incinerator relies on the personal experience of operating personnel completely, regulates the parameters such as the air quantity of each section of fire grate, air distribution ratio, delivery rate, fire grate each section of speed.Combustion conditions slightly changes, operations staff just needs ceaselessly to carry out associative operation, if operate unreasonable or the fluctuation that combustion conditions is larger can be caused not in time, so about incinerator burns the fuzzy control automaticity be badly in need of improve, a lot of equipment manufacturer has dropped into a large amount of manpower to study relevant domestic waste incineration automatic combustion control system, to realizing the target that automatically can regulate the stable operation making incinerator when refuse thermal value changes.
Summary of the invention
The object of the invention is, on the low side at MSW heating value for realizing, during calorific value change, incinerator can regulate and stable operation automatically, improves incinerator automatic combustion and controls, significantly reduce the target of the working strength of operations staff.
Technical solution of the present invention is: one way of life incinerator automatic combustion control system, hereinafter referred to as ACC control system, following Controlling model is set up with heat balance and material balance, by arranging the Lower heat value X1 of rubbish, steam flow Fs, these three basic parameters of the density Vr of rubbish, in conjunction with design parameter or the coefficient data of incinerator self, by regulating the flow Fa of combustion air, the air distribution ratio F1 of each section of fire grate, F2, F3, the speed FDs of pusher and each section of fire grate, DGs, MGs, BGs, the flow parameter of Secondary Air, realize controlling steam flow of boiler and be stabilized in setting value, clinker ignition loss minimizes, these three main contents of the generation of decreasing pollution thing are the automatic combustion control system of target, specifically being calculated as follows of above-mentioned Controlling model:
1, Fs × C1 ÷ X1=Y1; Wherein:
Fs: steam flow set point (unit: t/h);
C1: produce the heat (unit: MJ/t) that steam per ton needs;
X1: the Lower heat value setting value (unit: MJ/kg) of rubbish;
Y1: the quantity of refuse (unit: kg/h) of needs;
2, Y1 ÷ Vr ÷ W ÷ H=Fr; Wherein:
Vr: the density set point (unit: t/m of rubbish
3);
W: pusher width (unit: m);
H: pusher entry level (unit: m);
Fr: feed reference speed (unit: m/h);
3, Fr × C2=FDs; Fr × C3=DGs; Fr × C4=MGs; Fr × C5=BGs; Wherein:
C2: pusher speed correction factor;
FDs: pusher speed (unit: m/h);
C3: dry fire grate speed correction factor;
DGs: dry fire grate speed (unit: m/h);
C4: combustion grate speed correction factor;
MGs: combustion grate speed (unit: m/h);
C5: burn-out grate speed correction factor;
BGs: burn-out grate speed (unit: m/h);
4, Fs × C1 × C6=Y2; Wherein:
Fs: steam flow set point (unit: t/h);
C1: produce the heat (unit: MJ/t) that steam per ton needs;
C6: the air capacity (unit: km producing the burning that units of heat needs
3n/MJ);
Y2: the theoretical air requirement (unit: km of needs
3n/h);
5, Y2 × Rae=Fa; Wherein:
Y2: the theoretical air requirement (km of needs
3n/h);
Rae: the excess air coefficient of incinerator;
Fa: baseline air flow (unit: km
3n/h);
6, Fa × C7=F1; Fa × C8=F2; Fa × C9=F3; Wherein:
Fa: baseline air flow (unit: km
3n/h);
C7: drying oven air-discharging distribution coefficient;
F1: drying oven air-discharging flow (unit: km
3n/h);
C8: combustion grate air distribution coefficient;
F2: combustion grate air mass flow (unit: km
3n/h);
C9: burn-out grate air distribution coefficient;
F3: burn-out grate air mass flow (unit: km
3n/h).
The load variations in incinerator scope of design gently can be regulated by change steam flow set point; When refuse thermal value fluctuates among a small circle, this scheme can adjust fire grate speed, the data such as air quantity of each section automatically, to adapt to this change, maintains incinerator and is operated in stable state; When the calorific value of rubbish has larger fluctuation, incinerator also can be made automatically to adjust fire grate speed, the data such as air quantity of each section by changing the Lower heat value of rubbish and the setting value of density, to adapt to this change, maintaining incinerator and being operated in stable state.
Above-mentioned with heat balance and material balance for theoretical foundation calculates required benchmark air quantity and rubbish supply, in this, as each section of air quantity to fire grate, the basis that pusher speed, each section of fire grate speed regulate.
By changing the setting of quantity of steam, the present invention correspondingly can change the supply of rubbish and the supply of combustion air, has reached the object of Load Regulation.
By regulating the air mass flow of combustion grate section, promoting burning or suppressing burning, being the rising or reduction that furnace temperature is suitable, reaching quantity of steam and be stabilized in setting value object.
By at burning segment set temperature measurement mechanism, monitor the burning degree of rubbish, the fire grate section speed that control is relevant and burning air quantity reach the minimized object of clinker ignition loss.
Be not less than 850 DEG C of requirements of 2 seconds by controlling chamber flue gas temperature, and flue gas oxygen content remains on range of set value, the object that the generation reaching decreasing pollution thing controls.
Rational combustion air temperature, flow are set according to the difference of refuse thermal value, change the air distribution ratio of each section of fire grate, regulate the speed of each section of fire grate to make incinerator be operated in stable state.
Accompanying drawing explanation
Fig. 1 is the control loop schematic diagram of domestic waste incineration automatic combustion control system of the present invention.
Fig. 2, Fig. 3, Fig. 4 are the schematic diagram of steam flow control loop, fire box temperature control loop, rubbish layer thickness control loop respectively.
Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10 are the schematic diagram of ACC control system, steam flow control system, clinker ignition loss control system, oxygen content of smoke gas control system, fire box temperature control system, rubbish layer thickness control system respectively.
The schematic diagram that when automatic combustion control and incinerator load reduce when Figure 11, Figure 12 are the increase of incinerator load respectively, automatic combustion controls.
Figure 13, Figure 14, Figure 15, Figure 16 are main steam flow respectively, 24 hours historical data curve maps of burn-out grate upper temp, chamber flue gas temperature (being detained after 2 seconds), economizer exit oxygen content.
In figure:
1-pusher speed control valve; 2-is dry sweeps fire grate speed control valve; 3-combustion grate speed control valve; 4-burn-out grate speed control valve; 5-drying oven air-discharging flow measurement instrument; 6-drying oven air-discharging flow control valve; 7-combustion grate one section of air-flow measurement instrument; 8-combustion grate one section of air-flow measurement control valve; 9-combustion grate two sections of air-flow measurement instrument; 10-combustion grate two sections of air flow control valves; 11-combustion grate three sections of air-flow measurement instrument; 12-combustion grate three sections of air flow control valves; 13-burn-out grate one section of air-flow measurement instrument; 14-burn-out grate one section of air flow control valve, 15-burn-out grate two sections of air-flow measurement instrument; 16-burn-out grate two sections of air flow control valves; 17-burn-out grate upper temp measuring instrument; 18-waste layer thickness measuring instrument table; 19-secondary air flow control valve; 20-secondary air flow measuring instrument; 21-fire box temperature measuring instrument; 22-flue gas oxygen content measuring instrument; 23-positive airflow flowmeter; 24-ACC active station; 25-ACC control station.
Detailed description of the invention
As shown in Figure 1, be the control loop schematic diagram of domestic waste incineration automatic combustion control system of the present invention.Fig. 5 is the schematic diagram of ACC control system.Describe the control theory model of ACC brief and concisely, with heat balance and material balance for theoretical foundation, by arranging the Lower heat value of the rubbish of rubbish on active station, steam flow, these three basic parameters of the density of rubbish, according to the theory of heat balance and material balance draw respectively baseline combustion air capacity required for each section of fire grate and and pusher, the reference speed of each section of fire grate, each field apparatus control valve of usual adjustment, realize each section of air quantity, pusher, the control of fire grate speed, finally realize steam flow of boiler stabilisation, clinker ignition loss minimizes, these three major control targets of the generation of decreasing pollution thing.
The load variations in incinerator scope of design gently can be regulated by change steam flow set point; When refuse thermal value fluctuates among a small circle, this scheme can adjust fire grate speed, the data such as air quantity of each section automatically, to adapt to this change, maintains incinerator and is operated in stable state; When the calorific value of rubbish has larger fluctuation, incinerator also can be made automatically to adjust fire grate speed, the data such as air quantity of each section by changing the Lower heat value of rubbish and the setting value of density, to adapt to this change, maintaining incinerator and being operated in stable state.
Specifically being calculated as follows of this Controlling model:
1, Fs × C1 ÷ X1=Y1; Wherein:
Fs: steam flow set point (unit: t/h);
C1: produce the heat (unit: MJ/t) that steam per ton needs;
X1: the Lower heat value setting value (unit: MJ/kg) of rubbish;
Y1: the quantity of refuse (unit: kg/h) of needs;
2, Y1 ÷ Vr ÷ W ÷ H=Fr; Wherein:
Vr: the density set point (unit: t/m of rubbish
3);
W: pusher width (unit: m);
H: pusher entry level (unit: m);
Fr: feed reference speed (unit: m/h);
3, Fr × C2=FDs; Fr × C3=DGs; Fr × C4=MGs; Fr × C5=BGs; Wherein:
C2: pusher speed correction factor;
FDs: pusher speed (unit: m/h);
C3: dry fire grate speed correction factor;
DGs: dry fire grate speed (unit: m/h);
C4: combustion grate speed correction factor;
MGs: combustion grate speed (unit: m/h);
C5: burn-out grate speed correction factor;
BGs: burn-out grate speed (unit: m/h);
4, Fs × C1 × C6=Y2; Wherein:
Fs: steam flow set point (unit: t/h);
C1: produce the heat (unit: MJ/t) that steam per ton needs;
C6: the air capacity (unit: km producing the burning that units of heat needs
3n/MJ);
Y2: the theoretical air requirement (unit: km of needs
3n/h);
5, Y2 × Rae=Fa; Wherein:
Y2: the theoretical air requirement (km of needs
3n/h);
Rae: the excess air coefficient of incinerator;
Fa: baseline air flow (unit: km
3n/h);
6, Fa × C7=F1; Fa × C8=F2; Fa × C9=F3; Wherein:
Fa: baseline air flow (unit: km
3n/h);
C7: drying oven air-discharging distribution coefficient;
F1: drying oven air-discharging flow (unit: km
3n/h);
C8: combustion grate air distribution coefficient;
F2: combustion grate air mass flow (unit: km
3n/h);
C9: burn-out grate air distribution coefficient;
F3: burn-out grate air mass flow (unit: km
3n/h).
Calculation specifications about control loop:
Steam flow control loop in Fig. 2, the heat amount of cutting down according to the circumstance control loop, Oxygen Amount in Flue Gas control loop; Fire box temperature control loop in Fig. 3; Rubbish thickness control loop in Fig. 4; The calculating of each control loop is that thereof using PID controller calculates, each control loop is according to the deviation of setting value SV and measured value PV, carry out PID arithmetic, regulate the speed of relevant pusher, each section of fire grate, the air quantity of each section of fire grate according to the output of computing, reach the object of smooth combustion.
As shown in Figure 2, be the schematic diagram of steam flow control loop.Fig. 6 is the schematic diagram of steam flow control system.Describe the principle of steam flow control loop.
By setting the Lower heat value of vapor stream value and rubbish on ACC active station, heat balance theory draws the quantity of refuse of the so many caloric requirements of generation, and the baseline combustion air capacity that incineration firing needs, rule of thumb total combustion air amount is assigned to below every section of fire grate.How many major effects of the air mass flow wherein below combustion grate the severe degree of incineration firing, affect the steam flow of furnace temperature and generation.Jet chimney arranges vapour survey instrument, according to the deviation measuring vapor stream value and the setting value obtained, if measured value is higher, just reduces the air mass flow supply of burning zone, if measured value is on the low side, just increase the air mass flow supply of burning zone.
As shown in Figure 3, be the schematic diagram of fire box temperature control loop.Fig. 9 is the schematic diagram of fire box temperature control system.Describe the principle of fire box temperature control loop.
Measure fire box temperature by installing temperature measuring instrument on burner hearth, ACC active station arranges suitable temperature value, according to the deviation of setting value and measured value, if the temperature value measured is higher, now will increase the flow of Secondary Air; If the temperature value flow that will reduce Secondary Air on the low side measured.
As the schematic diagram that Fig. 4 is rubbish layer thickness control loop.Figure 10 is the schematic diagram of rubbish layer thickness control system.Describe the principle of rubbish thickness control loop.
Measure rubbish thickness on fire grate by installing rubbish thickness measure instrument on burner hearth, ACC active station arranges suitable one-tenth-value thickness 1/10 and the density of rubbish.According to the weight of the rubbish of the needs calculated in automatic steam control loop, draw the volume of rubbish, draw the reference speed of garbage feeding according to the size of fire grate and pusher, and then draw the reference speed of pusher and each section of fire grate.According to the setting value of rubbish thickness and the deviation of measured value, if the one-tenth-value thickness 1/10 measured is higher, the speed of now will slow down pusher and dry fire grate, increases the speed of combustion grate simultaneously; If the one-tenth-value thickness 1/10 measured is on the low side, the speed of pusher and dry fire grate now will be accelerated, the speed of the combustion grate that simultaneously slows down.
As the schematic diagram that Fig. 7 is clinker ignition loss control system.This figure describes heat and to cut down according to the circumstance the principle of rate control loop.
To cut down according to the circumstance the situation of rate by carrying out reflect heat at burn-out grate top set temperature measuring instrument, ACC active station arranges suitable temperature value, according to the deviation of setting value and measured value, if it is insufficient that the rubbish of the higher explanation of measuring tempeature herein burns above, ensure that the heat rate of cutting down according to the circumstance will increase the air mass flow of after-flame section, the speed of combustion grate and burn-out grate is also slack-off simultaneously; If temperature is on the low side, illustrate that rubbish burns above very abundant, now can reduce the air mass flow of after-flame section, the speed of combustion grate and burn-out grate also can accelerate simultaneously.
As the schematic diagram that Fig. 8 is oxygen content of smoke gas control system.This figure describes the principle of flue gas oxygen content control loop.
Flue gas oxygen content is measured by installing oxygen content measurement instrument in economizer exit, ACC active station arranges suitable oxygen content value, according to the deviation of setting value and measured value, if the flue gas oxygen content measured is higher, the flow of Secondary Air and the wind flow of burn-out grate section now will be reduced; The flow of Secondary Air and the wind flow of burn-out grate section will be increased if oxygen content is on the low side.
As the schematic diagram that automatic combustion when Figure 11 is the increase of incinerator load controls.By increasing the setting of steam raising amount, the air capacity of combustion grate section can be made to increase, and the increase of combustion air can promote incineration firing, and furnace temperature rises, and reaches the object that quantity of steam increases; The aggravation of incineration firing makes rubbish thickness thinning, maintain the supply that suitable thickness just increases rubbish, accelerate the speed of pusher and dry fire grate; The aggravation of incineration firing can make rubbish primary combustion position move upstream forward, and burn-out grate upper temp reduces, and the reduction ACC of this temperature can adjust combustion grate and burn-out grate speed is accelerated, and reduces the supply of burn-out grate combustion air; The aggravation of burning also can make flue gas oxygen content reduce, and ACC, by increasing the supply of Secondary Air, makes oxygen content maintain rational concentration; The rising of furnace temperature, the supply that ACC also can increase Secondary Air makes furnace temperature maintain rational temperature.
As the schematic diagram that automatic combustion when Figure 12 is the reduction of incinerator load controls.By reducing the setting of steam flow, the air capacity of combustion grate section can be made to reduce, and the minimizing of combustion air can suppress incineration firing, and furnace temperature declines, and reaches the object that quantity of steam reduces; The suppression of incineration firing makes rubbish thickness thickening, maintain the supply that suitable thickness just reduces rubbish, and ACC can slow down the speed of pusher and dry fire grate; The suppression of incineration firing can make rubbish primary combustion position move in downstream forward, and burn-out grate upper temp increases, and increasing ACC and slowing down combustion grate and burn-out grate speed of this temperature, increases the supply of burn-out grate combustion air, rubbish is burnt completely; The suppression of burning also can make flue gas oxygen content fall increase, and ACC, by reducing the supply of Secondary Air, makes oxygen content maintain rational concentration; The reduction of furnace temperature, the supply that ACC also can reduce Secondary Air makes furnace temperature maintain rational temperature.
When in the self-control combustion control system of incinerator, all control loops all drop into automatic, by observing 24 hours historical data curves of main steam flow PV value, SV value, as shown in figure 13; 24 hours historical data curves of burn-out grate upper temp PV value, SV value, as shown in figure 14; 24 hours historical data curves of chamber flue gas temperature (being detained after 2 seconds) PV value, SV value, as shown in figure 15; 24 hours historical data curves of economizer exit oxygen content PV value, SV value, as shown in figure 16.As long as the PV value curve of these 4 parameters for can fluctuate about setting value, and be no more than high and low alarming value, illustrate that this control system reaches design object.
The basic mathematic model of each control loop is set up by data based on the Heat balance calculation book of project technological design and MaterialBalance Computation book, situation according to concrete debugging determines the reference data such as air quantity, secondary air flow about delivery rate, each fire grate speed, First air temperature, Secondary Air temperature, First air flow, each section of fire grate respectively, and when load variations, refuse thermal value change the changing value of above-mentioned each parameter.Like this when calorific value changes, this system can regulate relevant device to maintain the stability of combustion conditions automatically.
In the present invention, the adjustment of main theory calculating and each control loop is as described below:
Required heat can be calculated by the vapor stream value arranged, the weight of required rubbish and the combustion air amount of needs can be calculated according to the Lower heat value of rubbish, the volume of the rubbish of needs is calculated according to the densitometer of rubbish, the speed of the rubbish supply of needs can be calculated according to the area of garbage inlet, draw the reference speed that pusher moves, the situation of burning on fire grate according to rubbish again and waste layer thickness control the speed of each section of fire grate respectively, so can realize easily regulating the load of incinerator and burn steadily being kept by the setting changing steam flow.
About the control of the stably setting value of steam flow, tune up mainly through regulating combustion grate section air mass flow or turn down, the quickening of the responsiveness of shear knife or slow down, realize the promotion to incineration firing situation or suppression, rising or the reduction of fire box temperature reach the stable control of steam flow.
About the control of rubbish thickness, according to the reasonable thickness of incinerator as control objectives, by regulating the speed of pusher, dry fire grate, combustion grate, rubbish thickness is maintained in the scope of applicable burning.
About the minimized control of clinker ignition loss, by at burn-out grate section set temperature measurement mechanism, monitor the burning degree of rubbish, if arrive rubbish herein to also have a large amount of flammable point, burn very vigorous, temperature can uprise herein, burning is promoted by the combustion air amount tuned up herein, slow down the burning time of speed prolongation rubbish on fire grate of burn-out grate, the speed slowing down combustion grate be rubbish burn on combustion grate more fully a bit, finally make the clinker ignition loss of rubbish remain in scope of design.
Generation about decreasing pollution thing controls, and mainly contains 2 points: one be to control chamber flue gas temperature be not less than 850 DEG C 2 seconds, two be to control flue gas oxygen content in the scope of design.
850 DEG C of controls of 2 seconds are not less than about chamber flue gas temperature, according to the size of burner hearth and flue gas flow calculate flue gas circulate in burner hearth 2 seconds after temperature, a temperature as control objectives, by the start and stop of auxiliary burner and the regulating guarantee chamber flue gas temperature of auxiliary burner diesel oil uninterrupted be not less than 850 DEG C 2 seconds.
About the control of the oxygen content of flue gas, control mainly through the flow of Secondary Air and the flow of burn-out grate section combustion air.Secondary Air can promote the further burning of in burner hearth flue gas flammable point, control to play Main Function to oxygen content in flue gas, but Secondary Air temperature is lower, especially when refuse thermal value is lower, spray into secondary air flow larger time incinerator temperature can be made on the low side, can be addressed this problem by the combustion air flow increasing burn-out grate section.
For refuse thermal value problem on the low side, rubbish be made to burn well in stove, except the scheme of layer thickness control above-mentioned, we distribute rational air quantity also will to each section of fire grate.According to the experience of domestic multiple incineration plant debugging, the allocation proportion of each section of fire grate air quantity when we have found out refuse thermal value change, and good application has been arrived in multiple project.
Achieve at MSW heating value on the low side, during calorific value change, incinerator can regulate and the target of stable operation automatically, improves the level that incinerator automatic combustion controls, greatly reduces the working strength of operations staff.
Following is instantiation of the present invention:
Example 1. take garbage treatment quantity as 250t/d, waste-heat oven quantity of steam is the incinerator of 20t/h is example, when the Lower heat value of rubbish is 6200KJ/Kg, steam setting value is 20t/h, rubbish thickness setting value is 0.5, burn-out grate upper temp setting value is 550 DEG C, fire box temperature setting value is 950 DEG C, economizer exit oxygen content 7%, pusher reference speed is 5.5m/h, dry fire grate, combustion grate, burn-out grate, the reference speed of shear knife is respectively 75s, 125s, 180s, 85s, First air temperature reference value is 260 DEG C, dry fire grate, combustion grate, the benchmark air quantity of burn-out grate three sections is respectively 5.8km3N/h, 19.6km3N/h, 4.2km3N/h, Secondary Air temperature a reference value is 40 DEG C, secondary air flow a reference value is 6.8km3N/h.
Example 2. take garbage treatment quantity as 300t/d, waste-heat oven quantity of steam is the incinerator of 25t/h is example, when the Lower heat value of rubbish is 6000KJ/Kg, steam setting value is 22t/h, rubbish thickness setting value is 0.6, burn-out grate upper temp setting value is 550 DEG C, fire box temperature setting value is 950 DEG C, economizer exit oxygen content 7%, pusher reference speed is 3.5m/h, dry fire grate, combustion grate, burn-out grate, the reference speed of shear knife is respectively 45s, 80s, 200s, 120s, First air temperature reference value is 200 DEG C, dry fire grate, combustion grate, the benchmark air quantity of burn-out grate three sections is respectively 6.8km3N/h, 24.6km3N/h, 7.2km3N/h, Secondary Air temperature a reference value is 40 DEG C, secondary air flow a reference value is 7.8km3N/h.
Example 3. take garbage treatment quantity as 350t/d, waste-heat oven quantity of steam is the incinerator of 35t/h is example, when the Lower heat value of rubbish is 6100KJ/Kg, steam setting value is 35t/h, rubbish thickness setting value is 0.5, burn-out grate upper temp setting value is 550 DEG C, fire box temperature setting value is 940 DEG C, economizer exit oxygen content 7%, pusher reference speed is 4.5m/h, dry fire grate, combustion grate, burn-out grate, the reference speed of shear knife is respectively 48s, 90s, 220s, 110s, First air temperature reference value is 250 DEG C, dry fire grate, combustion grate, the benchmark air quantity of burn-out grate three sections is respectively 6.0km3N/h, 29.6km3N/h, 12.2km3N/h, Secondary Air temperature a reference value is 40 DEG C, secondary air flow a reference value is 10.0km3N/h.
Example 4. take garbage treatment quantity as 400t/d, waste-heat oven quantity of steam is the incinerator of 45t/h is example, when the Lower heat value of rubbish is 6300KJ/Kg, steam setting value is 45t/h, rubbish thickness setting value is 0.5, burn-out grate upper temp setting value is 570 DEG C, fire box temperature setting value is 970 DEG C, economizer exit oxygen content 7%, pusher reference speed is 5.3m/h, dry fire grate, combustion grate, burn-out grate, the reference speed of shear knife is respectively 62s, 89s, 190s, 70s, First air temperature reference value is 200 DEG C, dry fire grate, combustion grate, the benchmark air quantity of burn-out grate three sections is respectively 9.0km3N/h, 36.4km3N/h, 15.4km3N/h, Secondary Air temperature a reference value is 40 DEG C, secondary air flow a reference value is 7.8km3N/h.
Example 5. take garbage treatment quantity as 500t/d, waste-heat oven quantity of steam is the incinerator of 54t/h is example, when the Lower heat value of rubbish is 6500KJ/Kg, steam setting value is 54t/h, rubbish thickness setting value is 0.5, burn-out grate upper temp setting value is 550 DEG C, fire box temperature setting value is 950 DEG C, economizer exit oxygen content 7%, pusher reference speed is 4.2m/h, dry fire grate, combustion grate, burn-out grate, the reference speed of shear knife is respectively 70s, 115s, 260s, 70s, First air temperature reference value is 280 DEG C, dry fire grate, combustion grate, the benchmark air quantity of burn-out grate three sections is respectively 13km3N/h, 44km3N/h, 16km3N/h, Secondary Air temperature a reference value is 40 DEG C, secondary air flow a reference value is 12km3N/h.
Claims (1)
1. one way of life incinerator automatic combustion control system, following Controlling model is set up with heat balance and material balance, by arranging Lower heat value X1, the steam flow Fs of rubbish, these three basic parameters of density Vr of rubbish, in conjunction with design parameter or the coefficient data of incinerator self, by regulating flow Fa, the air distribution ratio F1 of each section of fire grate, F2, F3 of combustion air, the speed FDs of pusher and each section of fire grate, DGs, MGs, BGs, the flow parameter of Secondary Air; Realize controlling steam flow of boiler and be stabilized in setting value, clinker ignition loss minimizes, and these three main contents of the generation of decreasing pollution thing are the automatic combustion control system of target; Specifically being calculated as follows of above-mentioned Controlling model: 1, Fs × C1 ÷ X1=Y1; Wherein: Fs: steam flow set point (unit: t/h); C1: produce the heat (unit: MJ/t) that steam per ton needs; X1: the Lower heat value setting value (unit: MJ/kg) of rubbish; Y1: the quantity of refuse (unit: kg/h) of needs; 2, Y1 ÷ Vr ÷ W ÷ H=Fr; Wherein: Vr: the density set point (unit: t/m of rubbish
3); W: pusher width (unit: m); H: pusher entry level (unit: m); Fr: feed reference speed (unit: m/h); 3, Fr × C2=FDs; Fr × C3=DGs; Fr × C4=MGs; Fr × C5=BGs; Wherein: C2: pusher speed correction factor; FDs: pusher speed (unit: m/h); C3: dry fire grate speed correction factor; DGs: dry fire grate speed (unit: m/h); C4: combustion grate speed correction factor; MGs: combustion grate speed (unit: m/h); C5: burn-out grate speed correction factor; BGs: burn-out grate speed (unit: m/h); 4, Fs × C1 × C6=Y2; Wherein: Fs: steam flow set point (unit: t/h); C1: produce the heat (unit: MJ/t) that steam per ton needs; C6: the air capacity (unit: km producing the burning that units of heat needs
3n/MJ); Y2: the theoretical air requirement (unit: km of needs
3n/h); 5, Y2 × Rae=Fa; Wherein: Y2: the theoretical air requirement (km of needs
3n/h); Rae: the excess air coefficient of incinerator; Fa: baseline air flow (unit: km
3n/h); 6, Fa × C7=F1; Fa × C8=F2; Fa × C9=F3; Wherein: Fa: baseline air flow (unit: km
3n/h); C7: drying oven air-discharging distribution coefficient; F1: drying oven air-discharging flow (unit: km
3n/h); C8: combustion grate air distribution coefficient; F2: combustion grate air mass flow (unit: km
3n/h); C9: burn-out grate air distribution coefficient; F3: burn-out grate air mass flow (unit: km
3n/h); It is characterized in that, measuring flue gas oxygen content by installing oxygen content measurement instrument in economizer exit, according to the deviation of setting value with measured value, if the flue gas oxygen content of measurement is higher, now reducing the flow of Secondary Air and the wind flow of burn-out grate section; If oxygen content is on the low side, increase the flow of Secondary Air and the wind flow of burn-out grate section.
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| CN201310176023.3A Active CN103216836B (en) | 2012-11-28 | 2012-11-28 | One way of life incinerator automatic combustion clinker ignition loss control system |
| CN201310176042.6A Active CN103234208B (en) | 2012-11-28 | 2012-11-28 | One way of life incinerator automatic combustion fire box temperature control system |
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| CN103672920A (en) * | 2013-05-17 | 2014-03-26 | 上海康恒环境股份有限公司 | Speed control device and method for fire grates of waste incinerator |
| CN103423750B (en) * | 2013-09-04 | 2015-09-02 | 南京科远自动化集团股份有限公司 | A kind of method for controlling combustion of incinerator |
| CN103900092B (en) * | 2014-03-26 | 2017-03-22 | 广州环投技术设备有限公司 | Automatic combustion control system for municipal solid waste incinerator |
| CN104154545B (en) * | 2014-07-28 | 2016-08-17 | 光大环保技术装备（常州）有限公司 | Automatic combustion control method and automatic combustion control system for incinerator |
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| CN108194934A (en) * | 2016-12-31 | 2018-06-22 | 上海康恒环境股份有限公司 | A kind of domestic waste incineration First air independence cloth wind flow interlock control system |
| CN107219327B (en) * | 2017-06-01 | 2023-05-30 | 深圳能源环保股份有限公司 | Method for detecting burning rate of household garbage incinerator slag |
| WO2019119385A1 (en) * | 2017-12-21 | 2019-06-27 | 深圳市能源环保有限公司 | Control method for use in tilting multilevel forward-pushing waste incinerator |
| CN110207133A (en) * | 2018-12-31 | 2019-09-06 | 上海康恒环境股份有限公司 | A kind of incinerator fire box temperature precise controlling method |
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| JP7316234B2 (en) * | 2020-02-26 | 2023-07-27 | 三菱重工業株式会社 | Control device, control method and program |
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| CN112344348A (en) * | 2020-11-05 | 2021-02-09 | 西安热工研究院有限公司 | Combustion optimization control method of garbage incinerator |
| CN113915601A (en) * | 2021-09-09 | 2022-01-11 | 中国五环工程有限公司 | Automatic control system and control method for air-fuel ratio of oil-gas boiler |
| CN114060826B (en) * | 2021-11-23 | 2024-05-28 | 浦湘生物能源股份有限公司 | Automatic incineration control method and control system for incinerator |
| CN115031242A (en) * | 2022-06-28 | 2022-09-09 | 上海康恒环境股份有限公司 | Method and device for controlling operation of fire grate of garbage incinerator |
| CN117029012B (en) * | 2023-08-11 | 2024-03-12 | 山东亚科环保科技有限公司 | Treatment system for waste liquid in caprolactam production |
| CN117847539A (en) * | 2024-02-28 | 2024-04-09 | 上海华励振环保科技有限公司 | Digital combustion monitoring system for garbage incinerator hearth and application method thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103234208B (en) | 2016-01-20 |
| CN103234208A (en) | 2013-08-07 |
| CN102927573A (en) | 2013-02-13 |
| CN103216835A (en) | 2013-07-24 |
| CN103216836B (en) | 2015-08-19 |
| CN103216836A (en) | 2013-07-24 |
| CN102927573B (en) | 2013-11-20 |
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