CN115371055A - Automatic control method and system for waste incineration - Google Patents
Automatic control method and system for waste incineration Download PDFInfo
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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
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
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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
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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Abstract
The application relates to an automatic control method and system for waste incineration, wherein the control method controls the steam flow by controlling the speed of a material pushing device, and when relevant parameters change, the set value of the material pushing speed can be automatically adjusted according to a given relational expression; the temperature of the hearth is controlled by the primary air quantity, and the oxygen content of the flue gas is controlled by the secondary air quantity. The control method provided by the invention considers a plurality of control variables such as furnace temperature, oxygen content, garbage content, steam content, primary air volume, secondary air volume and the like, has high automation degree and good control effect, and reduces manual intervention.
Description
Technical Field
The invention belongs to the field of waste incineration control, and particularly relates to an automatic control method and system for waste incineration.
Background
With the rapid development of economy in China, the living standard of people is rapidly improved, the urbanization process is continuously accelerated, and the yield of municipal solid waste is rapidly increased. The municipal solid waste treatment technology mainly comprises four types of sanitary landfill, waste composting, waste incineration and comprehensive utilization, wherein the waste incineration treatment technology has the unique advantages of volume reduction, harmlessness and recycling, and is widely popularized and applied in large and medium-sized cities in China as a relatively mature treatment technology.
However, the classification of municipal waste in China is not accurate enough, and the treatment system is not sound enough, so that the components are complex when the garbage is treated at the rear end, the calorific value of the garbage is low and the change is large, and the combustion working condition of the garbage incinerator is unstable. When the combustion condition changes, most garbage power plants need operators to perform related operations on primary air quantity, secondary air quantity, primary air proportion, pushing speed, grate operating speed and the like according to experience, if the operation is not timely or operation errors can cause larger combustion fluctuation, on the whole, most garbage incinerators are low in automation degree, need a large amount of manual operation, poor in combustion stability and unstable in steam quantity, and pollutants such as dioxin and nitrogen oxide exceed standards due to instability of indexes such as hearth temperature and oxygen quantity.
Disclosure of Invention
The invention provides an automatic control method for waste incineration, which realizes that the steam quantity and the temperature of a hearth are stable by automatically adjusting a boiler when the heat value of waste changes, so as to overcome the defects of the prior art.
The invention relates to an automatic control method for waste incineration, which comprises the following steps:
calculating the ratio of the garbage feeding amount to the steam amount based on the heat balance;
establishing a relation between the material pushing speed and the steam amount based on the relation between the garbage feeding amount and the material pushing speed and the proportion between the garbage feeding amount and the steam amount, so that the steam amount can be controlled by controlling the material pushing speed;
determining primary air reference air quantity according to the garbage feeding quantity, distributing the primary air reference air quantity to a drying section, a combustion section and a burning section, and determining secondary air reference air quantity according to the primary air reference air quantity;
and adjusting the primary air quantity according to the deviation of the measured value of the hearth temperature and the set value through a PID algorithm, and adjusting the secondary air quantity according to the deviation of the measured value of the flue gas oxygen quantity and the set value.
Further, calculating the ratio of the garbage feeding amount to the steam amount based on the heat balance specifically comprises:
estimating the heat value of the garbage according to the following formulas (1) - (3),
C 2 ＝η×C 1 (1)
C 2 ＝D×C k (2)
C 3 ＝C 1 ÷M (3)
in the formula, C 1 Heat released for combustion, C 2 For effective heat utilization of boiler, eta is boiler heat efficiency, D is steam amount, C k Is the actual specific heat value of the steam, C 3 The unit heat value of the garbage is shown, and M is the garbage feeding amount (unit is t/h);
and (4) calculating the proportional relation between the garbage feeding amount and the steam amount according to the formulas (1) - (3) as shown in the following formula (4).
D＝M×C 3 ×η÷C k (4)
Further, establishing the relationship between the pushing speed and the steam amount comprises:
the relation between the material pushing speed and the garbage feeding amount is established as the following formula (5),
M＝d×L×v×ρ (5)
in the formula, d is the thickness of a garbage discharging layer, L is the width of a grate, rho is a garbage density set value, and v is the speed of a material pusher;
the relation between the material pushing speed and the steam amount is established according to the proportional relation between the garbage feeding amount and the steam amount represented by the formula (4) and the formula (5) as shown in the following formula (6).
Further, the primary air reference air volume is determined according to the following formula (7),
R＝M×C 4 ×α (7)
wherein R is primary air standard air quantity, M is garbage feeding quantity, C 4 The theoretical air quantity required by burning the unit garbage, alpha is an excess air coefficient, and the value range of the alpha is 1.1-1.4;
the primary air reference air quantity is distributed to the drying section, the combustion section and the burnout section according to the following formulas (8) to (10),
F 1 ＝R×C 5 (8)
F 2 ＝R×C 6 (9)
F 3 ＝R×C 7 (10)
in the formula, F 1 、F 2 、F 3 Air flow rate, C, of the drying section, the combustion section and the burnout section respectively 5 、C 6 、C 7 Air distribution coefficients of the drying section, the combustion section and the burnout section respectively meet the requirement C 5 +C 6 +C 7 ＝1。
Further, the secondary air reference air volume is determined to be Q =0.1 to 0.2R, and Q is the secondary air reference air volume. And R is the primary air reference air quantity.
In another aspect, the present invention provides an automatic control system for waste incineration, comprising:
the heat balance calculation module is used for calculating the proportion of the garbage feeding amount and the steam amount based on the heat balance;
the steam quantity control module is used for controlling the steam quantity by controlling the material pushing speed, wherein the relation between the material pushing speed and the steam quantity is determined based on the relation between the garbage feeding quantity and the material pushing speed and the proportion between the garbage feeding quantity and the steam quantity;
the reference air volume calculating module is used for determining primary air reference air volume according to the garbage feeding volume, distributing the primary air reference air volume to the drying section, the combustion section and the burn-out section, and determining secondary air reference air volume according to the primary air reference air volume;
and the air quantity control module is used for adjusting the primary air quantity according to the deviation of the measured value of the temperature of the hearth and the set value through a PID algorithm and adjusting the secondary air quantity according to the deviation of the measured value of the oxygen content of the flue gas and the set value.
Further, the heat balance calculation module carries out the estimation of the heat value of the garbage according to the following formulas (1) - (3) when calculating the proportion of the feeding amount and the steam amount of the garbage,
C 2 ＝η×C 1 (1)
C 2 ＝D×C k (2)
C 3 ＝C 1 ÷M (3)
in the formula, C 1 Heat released for combustion, C 2 For effective heat utilization of boiler, eta is boiler heat efficiency, D is steam amount, C k Is the actual specific heat value of the steam, C 3 The unit calorific value of the garbage is shown, and M is the garbage feeding amount (the unit is t/h);
and calculating the proportion relation of the garbage feeding amount and the steam amount according to the formulas (1) - (3) as shown in the following formula (4).
D＝M×C 3 ×η÷C k (4)
Further, when the steam amount control module is used for controlling the steam amount, the steam amount control module comprises:
the relation between the material pushing speed and the garbage feeding amount is established as the following formula (5),
M＝d×L×v×ρ (5)
in the formula, d is the thickness of a garbage discharging layer, L is the width of a fire grate, rho is a garbage density set value, and v is the speed of a material pusher;
and (3) establishing the relation between the material pushing speed and the steam quantity according to the proportional relation between the garbage feeding quantity and the steam quantity represented by the formula (4) and the formula (5) as shown in the following formula (6), and controlling the steam quantity according to the formula (6).
Further, the air quantity calculating module is in factWhen the primary wind reference wind volume is determined, the following formula (7) is performed, and R = M × C 4 ×α (7)
Wherein R is primary air reference air quantity, M is garbage feeding quantity, C 4 The theoretical air quantity required by burning the unit garbage, alpha is an excess air coefficient, and the value range of the alpha is 1.1-1.4;
distributing the primary air reference air quantity to a drying section, a combustion section and an ember section according to the following formulas (8) to (10), F 1 ＝R×C 5 (8)
F 2 ＝R×C 6 (9)
F 3 ＝R×C 7 (10)
In the formula, F 1 、F 2 、F 3 Air flow rates of the drying section, the combustion section and the burnout section, respectively, C 5 、C 6 、C 7 Air distribution coefficients of the drying section, the combustion section and the burnout section respectively meet the requirement of C 5 +C 6 +C 7 ＝1。
Further, when the air volume calculation module determines the secondary air reference air volume, Q =0.1 to 0.2r is performed in the following relation, and Q is the secondary air reference air volume. And R is the primary air reference air quantity.
According to the technical scheme, the invention has the following beneficial effects:
the invention relates to an automatic control method and a system for waste incineration, wherein the control method controls the steam flow by controlling the speed of a material pusher, and when relevant parameters change, the set value of the material pushing speed can be automatically adjusted according to a given relational expression; the temperature of the hearth is controlled through the primary air quantity, and the oxygen content of the flue gas is controlled through the secondary air quantity. The operating station is provided with a set value of the hearth temperature and a set value of the flue gas oxygen content, and the PID algorithm automatically adjusts the primary air quantity and the secondary air quantity according to the deviation of the measured value and the set value, so that the fluctuation of the garbage heat value can be overcome, the requirement on the stability of the garbage heat value is not high, and the method is suitable for most of the existing garbage power plants; the method considers a plurality of control variables such as furnace temperature, oxygen quantity, garbage quantity, steam quantity, primary and secondary air quantity and the like, has high automation degree and good control effect, and reduces manual intervention; the method can also overcome the large fluctuation of the steam quantity and the combustion working condition, effectively reduce the metal thermal fatigue of the heat exchange surface and prolong the service life of the pipe wall.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of an automatic garbage incineration control system according to an embodiment of the present invention
FIG. 2 is a schematic view of the movement of a waste grate in accordance with an embodiment of the present invention
FIG. 3 is a schematic view of an automatic control process for waste incineration according to an embodiment of the present invention
FIG. 4 is a block diagram of automatic control of furnace temperature according to an embodiment of the present invention
FIG. 5 is a block diagram of automatic oxygen control for flue gas according to an embodiment of the present invention
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present embodiment provides an automatic control system 100 for waste incineration, including:
a thermal balance calculation module 110 for calculating a ratio of the garbage feeding amount to the steam amount based on the thermal balance;
a steam amount control module 120 for controlling the steam amount by controlling the material pushing speed, wherein the relation between the material pushing speed and the steam amount is determined based on the relation between the garbage feeding amount and the material pushing speed and the proportion between the garbage feeding amount and the steam amount;
the reference air volume calculating module 130 is used for determining primary air reference air volume according to the garbage feeding volume, distributing the primary air reference air volume to the drying section, the burning section and the burning section, and determining secondary air reference air volume according to the primary air reference air volume;
and the air quantity control module 140 is used for adjusting the primary air quantity according to the deviation between the measured value of the temperature of the hearth and the set value through a PID algorithm and adjusting the secondary air quantity according to the deviation between the measured value of the oxygen content of the flue gas and the set value.
When the control system 100 performs automatic control of the incineration of the refuse, as shown in fig. 2, the following control processes are performed:
the thermal balance calculation module 110 is used to make a garbage heating value estimation, from which the ratio of the garbage feed amount to the steam amount is determined.
According to the boiler heat balance principle, the estimation of the garbage heat value is carried out according to the following formulas (1) to (3),
C 2 ＝η×C 1 (1)
C 2 ＝D×C k (2)
C 3 ＝C 1 ÷M (3)
in the formula, C 1 Heat released for combustion, C 2 For effective heat utilization of boiler, eta is boiler heat efficiency, D is steam amount, C k Is the actual specific heat value, C, contained in the steam 3 The unit heat value of the garbage is shown, and M is the garbage feeding amount (unit is t/h);
and (4) calculating the proportional relation between the garbage feeding amount and the steam amount according to the formulas (1) to (3) as shown in the following formula (4).
D＝M×C 3 ×η÷C k (4)
Garbage unit calorific value C 3 And the known quantity is estimated according to the waste consumption of the previous 24h and the total steam quantity, and the rolling updating is carried out in the waste incineration control process.
When the steam amount control module 120 controls the steam amount, the following relationship is established:
as shown in fig. 3, the movement of the waste on the grate, the amount of waste fed can be represented by the following formula (5),
M＝d×L×v×ρ (5)
in the formula, d is the thickness of a garbage discharging layer, L is the width of a fire grate, rho is a garbage density set value, and v is the speed of a material pusher;
the relationship between the pushing speed and the steam amount can be obtained according to the formula (4) and the formula (5) as the following formula (6),
when the related parameters change, the pushing speed is automatically adjusted according to the formula (6) so as to determine the required steam quantity and ensure that the quantity of the garbage entering the hearth is constant.
The reference air volume calculation module 130 determines the primary air reference air volume and the secondary air reference air volume as follows:
when the primary air reference air quantity is determined, the method is carried out according to the following formula (7),
R＝M×C 4 ×α (7)
wherein R is primary air standard air quantity, M is garbage feeding quantity, C 4 The theoretical air quantity required for burning the unit garbage, alpha is an excess air coefficient, and the value range of alpha is 1.1-1.4;
the primary air reference air quantity is distributed to the drying section, the combustion section and the burnout section according to the following formulas (8) to (10),
F 1 ＝R×C 5 (8)
F 2 ＝R×C 6 (9)
F 3 ＝R×C 7 (10)
in the formula, F 1 、F 2 、F 3 Air flow rates of the drying section, the combustion section and the burnout section, respectively, C 5 、C 6 、C 7 Air distribution coefficients of the drying section, the combustion section and the burnout section respectively meet the requirement C 5 +C 6 +C 7 ＝1。
The secondary air reference air quantity is determined according to the primary air reference air quantity, Q = 0.1-0.2R is provided, and Q is the secondary air reference air quantity. And R is the primary air reference air quantity.
The air volume control module 140 adjusts the primary air volume and the secondary air volume through a PID algorithm. FIGS. 4 and 5 show one of the PID control furnace temperature and flue gas oxygen content conditions. Under the design condition, according to the primary air reference air quantity and the distribution mode calculated by the formulas (7) and (8), the hearth temperature can reach a set value, and when the measured value of the hearth temperature deviates from the set value, the temperature deviation e 1 (t) obtaining the regulated output u by PID algorithm 1 (t), adjusting the amount u 1 And (t) controlling the primary air fan together with the primary air reference air quantity to adjust the primary air quantity, so that the primary air quantity is increased when the measured value of the hearth temperature is lower than a set value, and the primary air quantity is reduced when the measured value of the hearth temperature is higher than the set value. Similarly, under the design condition, the oxygen content of the flue gas can reach a set value according to the secondary air reference air volume calculated by the formula Q = 0.1-0.2R, and when the measured value of the oxygen content of the flue gas deviates from the set value, the oxygen content deviation e 2 (t) obtaining the regulated output u by PID algorithm 2 (t), adjusting the amount u 2 And (t) controlling a secondary fan together with the secondary air reference air quantity to adjust the secondary air quantity, increasing the secondary air quantity when the measured oxygen content value of the flue gas is lower than a set value, and reducing the secondary air quantity when the measured oxygen content value of the flue gas is higher than the set value.
Two specific examples of the invention are given below:
example 1: taking a garbage power plant with the daily garbage handling capacity of 600t and the boiler steam amount of 65t/h as an example, the low-grade calorific value of garbage is 6200kJ/Kg, the steam flow set value is 65t/h, the thickness of the garbage layer is set to be 0.5m, the furnace temperature is set to be 980 ℃, the oxygen content of the outlet flue gas of the economizer is 8 percent, the reference material pushing speed is 6.1m/s, the reference speeds of the grates of the drying section, the combustion section and the burn-out section are 65s, 115s and 170s, and the reference air volumes of the drying section, the combustion section and the burn-out section are respectively 13.5km 3 N/h、52.8km 3 N/h、22.5km 3 N/h, secondary air standard air quantity of 11.8km 3 N/h。
Example 2: the daily garbage treatment capacity is 500t, and the steam quantity of a boiler is 55t/hFor example, the low calorific value of garbage is 6100kJ/Kg, the steam flow setting value is 55t/h, the thickness of the garbage layer is 0.5m, the furnace temperature is 960 ℃, the oxygen content of the flue gas at the outlet of the economizer is 7%, the reference material pushing speed is 5.6m/s, the reference speeds of the fire grates of the drying section, the combustion section and the burn-out section are 72s, 105s and 190s, and the reference air volumes of the drying section, the combustion section and the burn-out section are 11.8km respectively 3 N/h、44.6km 3 N/h、18.2km 3 N/h, secondary air standard air quantity of 10.2km 3 N/h。
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An automatic control method for waste incineration is characterized by comprising the following steps:
calculating the proportion of the garbage feeding amount to the steam amount based on the heat balance;
establishing a relation between the material pushing speed and the steam amount based on the relation between the garbage feeding amount and the material pushing speed and the proportion between the garbage feeding amount and the steam amount, so that the steam amount can be controlled by controlling the material pushing speed;
determining primary air reference air quantity according to the garbage feeding quantity, distributing the primary air reference air quantity to a drying section, a combustion section and a burning section, and determining secondary air reference air quantity according to the primary air reference air quantity;
and adjusting the primary air quantity according to the deviation of the measured value of the hearth temperature and the set value through a PID algorithm, and adjusting the secondary air quantity according to the deviation of the measured value of the flue gas oxygen quantity and the set value.
2. The method of claim 1, wherein the calculating the ratio of the garbage feeding amount to the steam amount based on the heat balance comprises:
estimating the heat value of the garbage according to the following formulas (1) - (3),
C 2 ＝η×C 1 (1)
C 2 ＝D×C k (2)
C 3 ＝C 1 ÷M (3)
in the formula, C 1 Heat released for combustion, C 2 For effective heat utilization of boiler, eta is boiler heat efficiency, D is steam amount, C k Is the actual specific heat value of the steam, C 3 The unit calorific value of the garbage is shown, and M is the garbage feeding amount (the unit is t/h);
and (4) calculating the proportional relation between the garbage feeding amount and the steam amount according to the formulas (1) - (3) as shown in the following formula (4).
D＝M×C 3 ×η÷C k (4)
3. The method of claim 2, wherein the step of establishing the relationship between the pushing speed and the amount of steam comprises:
the relation between the material pushing speed and the garbage feeding amount is established as the following formula (5),
M＝d×L×v×ρ (5)
in the formula, d is the thickness of a garbage discharging layer, L is the width of a fire grate, rho is a garbage density set value, and v is the speed of a material pusher;
the relationship between the pushing speed and the steam amount is established according to the formula (4) and the formula (5) as shown in the following formula (6).
4. The method according to claim 1, wherein the determination of the primary air reference air volume is performed according to the following formula (7),
R＝M×C 4 ×α (7)
wherein R is primary air standard air quantity, and M is garbage feeding materialAmount, C 4 The theoretical air quantity required for burning the unit garbage, alpha is an excess air coefficient, and the value range of alpha is 1.1-1.4;
the primary air reference air quantity is distributed to a drying section, a combustion section and a burnout section according to the following formulas (8) to (10),
F 1 ＝R×C 5 (8)
F 2 ＝R×C 6 (9)
F 3 ＝R×C 7 (10)
in the formula, F 1 、F 2 、F 3 Air flow rates of the drying section, the combustion section and the burnout section, respectively, C 5 、C 6 、C 7 Air distribution coefficients of the drying section, the combustion section and the burnout section respectively meet the requirement C 5 +C 6 +C 7 ＝1。
5. An automatic control method for refuse incineration according to claim 1, wherein the determination of the secondary air reference air volume is Q =0.1 to 0.2r, Q being the secondary air reference air volume. And R is the primary air reference air quantity.
6. An automatic control system for waste incineration, comprising:
the heat balance calculation module is used for calculating the proportion of the garbage feeding amount to the steam amount based on heat balance;
the steam quantity control module is used for controlling the steam quantity by controlling the material pushing speed, wherein the relation between the material pushing speed and the steam quantity is determined based on the relation between the garbage feeding quantity and the material pushing speed and the proportion between the garbage feeding quantity and the steam quantity;
the reference air volume calculating module is used for determining primary air reference air volume according to the garbage feeding volume, distributing the primary air reference air volume to the drying section, the combustion section and the burn-out section, and determining secondary air reference air volume according to the primary air reference air volume;
and the air quantity control module is used for adjusting the primary air quantity according to the deviation of the measured value of the temperature of the hearth and the set value through a PID algorithm and adjusting the secondary air quantity according to the deviation of the measured value of the oxygen content of the flue gas and the set value.
7. The automatic control system for waste incineration of claim 6, wherein the heat balance calculation module performs a waste heat value estimation according to the following equations (1) - (3) when calculating the ratio of the waste feeding amount to the steam amount,
C 2 ＝η×C 1 (1)
C 2 ＝D×C k (2)
C 3 ＝C 1 ÷M (3)
in the formula, C 1 Heat released for combustion, C 2 For effective heat utilization of boiler, eta is boiler heat efficiency, D is steam amount, C k Is the actual specific heat value, C, contained in the steam 3 The unit calorific value of the garbage is shown, and M is the garbage feeding amount (the unit is t/h);
and calculating the proportion relation of the garbage feeding amount and the steam amount according to the formulas (1) - (3) as shown in the following formula (4).
D＝M×C 3 ×η÷C k (4)
8. The automatic refuse incineration control system according to claim 7, wherein the steam amount control module, when controlling the steam amount, comprises:
the relation between the material pushing speed and the garbage feeding amount is established as the following formula (5),
M＝d×L×v×ρ (5)
in the formula, d is the thickness of a garbage discharging layer, L is the width of a fire grate, rho is a garbage density set value, and v is the speed of a material pusher;
the relationship between the pushing speed and the steam amount is established according to the formula (4) and the formula (5) as the following formula (6), and the steam amount is controlled according to the formula (6).
9. The automatic refuse incineration control system according to claim 6, wherein the reference air volume calculating module determines the reference air volume of the primary air according to the following formula (7),
R＝M×C 4 ×α (7)
wherein R is primary air standard air quantity, M is garbage feeding quantity, C 4 The theoretical air quantity required by burning the unit garbage, alpha is an excess air coefficient, and the value range of the alpha is 1.1-1.4;
the primary air reference air quantity is distributed to the drying section, the combustion section and the burnout section according to the following formulas (8) to (10),
F 1 ＝R×C 5 (8)
F 2 ＝R×C 6 (9)
F 3 ＝R×C 7 (10)
in the formula, F 1 、F 2 、F 3 Air flow rate, C, of the drying section, the combustion section and the burnout section respectively 5 、C 6 、C 7 Air distribution coefficients of the drying section, the combustion section and the burnout section respectively meet the requirement C 5 +C 6 +C 7 ＝1。
10. The automatic refuse incineration control system according to claim 6, wherein the air volume calculation module determines the secondary air reference air volume by performing Q = 0.1-0.2R in the following relationship, Q being the secondary air reference air volume. And R is the primary air reference air quantity.
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| CN116481033A (en) * | 2023-05-19 | 2023-07-25 | 北京中科润宇环保科技股份有限公司 | Automatic combustion control method for universal household garbage incinerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116481033A (en) * | 2023-05-19 | 2023-07-25 | 北京中科润宇环保科技股份有限公司 | Automatic combustion control method for universal household garbage incinerator |
| CN116481033B (en) * | 2023-05-19 | 2024-03-05 | 北京中科润宇环保科技股份有限公司 | Automatic combustion control method for universal household garbage incinerator |
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