CN113251435B - Combustor adjusting method and system based on temperature field, DCS (distributed control System) and medium - Google Patents
Combustor adjusting method and system based on temperature field, DCS (distributed control System) and medium Download PDFInfo
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- CN113251435B CN113251435B CN202110658473.0A CN202110658473A CN113251435B CN 113251435 B CN113251435 B CN 113251435B CN 202110658473 A CN202110658473 A CN 202110658473A CN 113251435 B CN113251435 B CN 113251435B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
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Abstract
The application relates to a burner adjusting method, a burner adjusting system, a DCS system and a medium based on a temperature field, wherein the method comprises the steps of obtaining the area temperatures of a plurality of preset areas in a hearth; calculating an average temperature in the furnace based on the zone temperatures of the plurality of preset zones; respectively calculating the absolute value of the difference value between the area temperature and the average temperature of each preset area to obtain the deviation value of each preset area; adjusting a first adjusting mechanism and/or a second adjusting mechanism of each preset area based on the deviation amount of each preset area; and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth. The utility model provides the temperature is even in making the furnace, can improve the holistic combustion efficiency of furnace, and buggy heat energy conversion rate is high among the power generation process, has realized energy saving and consumption reduction effect to reduce heating power type NOx's generation, and then reduced the harm to atmospheric environment.
Description
Technical Field
The application relates to the field of DCS control, in particular to a burner adjusting method and system based on a temperature field, a DCS system and a medium.
Background
Thermal power generation is a power generation mode for converting heat energy generated by combustible combustion into electric energy, Chinese coal resources are abundant, and thermal power generation still has huge potential.
In the correlation technique, the main equipment of thermal power factory includes furnace and coal pulverizer, installs a plurality of combustors on the preceding wall of furnace, the back wall, and the coal pulverizer lets in the wind-powder mixture in passing through the pipeline to the combustor, and the heat that the pulverized coal burning produced makes the steam generator in the furnace produce steam, then generates electricity through the steam turbine.
Aiming at the related technologies, the inventor thinks that the combustion efficiency of each combustor in the hearth is different, so that the temperature in the hearth is uneven and has larger deviation, the combustion efficiency of the whole hearth can be influenced, the pulverized coal heat energy conversion rate is low, NOx is easily generated, and the environment is polluted.
Disclosure of Invention
In order to reduce the occurrence of the condition of low combustion efficiency of a hearth, the application provides a combustor adjusting method and system based on a temperature field, a DCS system and a medium.
In a first aspect, the present application provides a burner adjusting method based on a temperature field, which adopts the following technical scheme:
a method of temperature field based combustor tuning, comprising:
acquiring the zone temperatures of a plurality of preset zones in a hearth, wherein each preset zone is respectively provided with a plurality of layers of burners;
calculating an average temperature in the furnace based on the zone temperatures of the plurality of preset zones;
respectively calculating the absolute value of the difference value between the area temperature and the average temperature of each preset area to obtain the deviation value of each preset area;
adjusting a first adjusting mechanism and/or a second adjusting mechanism of each preset area based on the deviation amount of each preset area, wherein the first adjusting mechanism and the second adjusting mechanism are in one-to-one correspondence with the burners, the first adjusting mechanism is used for adjusting the speed and the concentration of the air-powder mixture entering the corresponding burner, and the second adjusting mechanism is used for adjusting the amount of oxygen for supporting combustion introduced into the corresponding burner;
and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth.
By adopting the technical scheme, the combustion efficiency of the pulverized coal of the combustor in the preset area can be reflected by the area temperature in the preset area, the first adjusting mechanism and/or the second adjusting mechanism corresponding to the preset area in the hearth can be adjusted according to the deviation amount of the area temperature and the average temperature, so that the temperature in the hearth is uniform, the overall combustion efficiency of the hearth can be improved, the pulverized coal heat energy conversion rate in the power generation process is high, the energy-saving and consumption-reducing effects are realized, the generation of thermal NOx is reduced, and further the harm to the atmospheric environment is reduced.
Optionally, before obtaining the zone temperatures of the plurality of preset zones in the furnace, the method further includes:
dividing the inner area of the hearth based on the sound wave propagation paths of a plurality of sound wave temperature measuring sensors arranged on the inner wall of the hearth to obtain a plurality of preset areas;
the acquiring of the zone temperatures of a plurality of preset zones in the hearth comprises:
and determining the area temperature of each preset area based on the sound wave signals transmitted between the sound wave temperature measuring sensors.
Through adopting above-mentioned technical scheme, according to quantity and the position of sound wave temperature measurement sensor with furnace inside division into a plurality of predetermined regions, be convenient for measure the furnace temperature under the high temperature environment accurately.
Optionally, the adjusting the first adjusting mechanism and/or the second adjusting mechanism of the preset region based on the deviation amount of each preset region includes:
judging whether the deviation amount of the current preset area is in a reasonable interval or not;
if not, comparing the area temperature of the current preset area with the average temperature;
if the area temperature of the current preset area is greater than the average temperature, reducing the opening degree of a first adjusting mechanism and/or a second adjusting mechanism corresponding to a current layer combustor of the current preset area, and repeating the step of obtaining the area temperatures of a plurality of preset areas in the hearth;
if the area temperature of the current preset area is smaller than the average temperature, the opening degree of a first adjusting mechanism and/or a second adjusting mechanism corresponding to the current layer combustor of the current preset area is increased, and the step of obtaining the area temperatures of a plurality of preset areas in the hearth is repeated.
By adopting the technical scheme, the temperature deviation amount of each preset area is taken as a reference, and if the deviation amount is too large, the opening degree of the first adjusting mechanism and/or the second adjusting mechanism needs to be adjusted, so that the temperature deviation amount of each preset area is kept in a reasonable range, and the integral temperature of the hearth is ensured to be uniform.
Optionally, when only the opening degree of the first adjusting mechanism corresponding to the current-layer combustor in the current preset area is reduced, whether the opening degree of the first adjusting mechanism corresponding to the current-layer combustor reaches a lower limit value is judged;
if the opening degree of the first adjusting mechanism does not reach the lower limit value, reducing the opening degree of the first adjusting mechanism corresponding to the burner at the current layer, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degree of the first adjusting mechanism reaches a lower limit value, judging whether the current layer combustor is the last layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeatedly judging whether the opening of the first adjusting mechanism corresponding to the current-layer combustor reaches a lower limit value;
when the opening degree of a second adjusting mechanism corresponding to the current layer combustor in the current preset area is only reduced, judging whether the opening degree of the second adjusting mechanism corresponding to the current layer combustor reaches a lower limit value;
if the opening degree of the second adjusting mechanism does not reach the lower limit value, reducing the opening degree of the second adjusting mechanism corresponding to the burner at the current layer, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degree of the second adjusting mechanism reaches the lower limit value, judging whether the current layer combustor is the last layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeatedly judging whether the opening degree of a second adjusting mechanism corresponding to the current-layer combustor reaches a lower limit value;
when the opening degrees of a first adjusting mechanism and a second adjusting mechanism corresponding to the current-layer combustor in the current preset area are reduced, respectively judging whether the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach a lower limit value;
if the adjusting mechanism which does not reach the lower limit value exists in the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor, reducing the opening degree of the adjusting mechanism which does not reach the lower limit value and corresponds to the current-layer combustor, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach the lower limit value, judging whether the current-layer combustor is the last-layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeating the step of respectively judging whether the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach the lower limit value.
By adopting the technical scheme, when the opening degree of the first adjusting mechanism and/or the second adjusting mechanism needs to be adjusted, only the first adjusting mechanism and/or the second adjusting mechanism corresponding to the combustor in one layer is adjusted each time, and as long as the first adjusting mechanism and/or the second adjusting mechanism corresponding to the combustor in the current layer reaches the lower limit value, whether the first adjusting mechanism and/or the second adjusting mechanism corresponding to the combustor in the next layer meets the adjusting condition or not is continuously judged.
Optionally, when only the opening degree of the first adjusting mechanism corresponding to the current-layer combustor in the current preset area is increased, whether the opening degree of the first adjusting mechanism corresponding to the current-layer combustor reaches an upper limit value is judged;
if the opening degree of the first adjusting mechanism does not reach the upper limit value, increasing the opening degree of the first adjusting mechanism corresponding to the burner at the current layer, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degree of the first adjusting mechanism reaches the upper limit value, judging whether the current layer combustor is the last layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeating the step of judging whether the opening degree of the first adjusting mechanism corresponding to the current-layer combustor reaches the upper limit value or not;
when only the opening degree of a second adjusting mechanism corresponding to the current-layer combustor in the current preset area is increased, judging whether the opening degree of the second adjusting mechanism corresponding to the current-layer combustor reaches an upper limit value;
if the opening degree of the second adjusting mechanism does not reach the upper limit value, increasing the opening degree of the second adjusting mechanism corresponding to the burner at the current layer, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degree of the second adjusting mechanism reaches the upper limit value, judging whether the current layer combustor is the last layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeating the step of judging whether the opening degree of a second adjusting mechanism corresponding to the current-layer combustor reaches the upper limit value or not;
when the opening degrees of a first adjusting mechanism and a second adjusting mechanism corresponding to a current layer combustor in the current preset area are increased, respectively judging whether the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current layer combustor reach an upper limit value;
if the adjusting mechanism which does not reach the upper limit value exists in the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor, the opening degree of the adjusting mechanism which does not reach the upper limit value and corresponds to the current-layer combustor is increased, and the step of obtaining the zone temperatures of a plurality of preset zones in the hearth is repeated;
if the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach the upper limit value, judging whether the current-layer combustor is the last-layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeating the step of respectively judging whether the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach the upper limit value or not.
By adopting the technical scheme, when the opening degree of the first adjusting mechanism and/or the second adjusting mechanism needs to be adjusted, only the first adjusting mechanism and/or the second adjusting mechanism corresponding to the combustor in one layer is adjusted each time, and as long as the first adjusting mechanism and/or the second adjusting mechanism corresponding to the combustor in the current layer reaches the upper limit value, whether the first adjusting mechanism and/or the second adjusting mechanism corresponding to the combustor in the next layer meets the adjusting condition or not is continuously judged.
Optionally, the next layer of burners of the current layer of burners is located above the current layer of burners, and the last layer of burners is burners close to the top of the hearth.
By adopting the technical scheme, heat generated by pulverized coal combustion is transferred from bottom to top in each preset area, and the first adjusting mechanism and/or the second adjusting mechanism corresponding to the layered adjustment burner from bottom to top have a large influence on the temperature of the current preset area, so that the temperature of the preset area is adjusted more obviously.
Optionally, the method further includes: acquiring the current temperature of the air-powder mixture entering the combustor;
judging whether the current temperature is in a preset temperature interval or not;
if not, adjusting a third adjusting mechanism and/or a fourth adjusting mechanism, wherein the third adjusting mechanism is used for adjusting the amount of hot air entering the coal mill, and the fourth adjusting mechanism is used for adjusting the amount of cold air entering the coal mill;
repeating the step of obtaining the current temperature of the air-powder mixture entering the burner.
Through adopting above-mentioned technical scheme, through the regulation to third adjustment mechanism and/or fourth adjustment mechanism, can make the current temperature of the wind-powder mixture that gets into the combustor stabilize in reasonable temperature interval, can make the combustor burning abundant, can reduce again because of the high temperature leads to the condition emergence of wind-powder mixture burning in order to damage equipment when not getting into the combustor.
In a second aspect, the present application provides a DCS control system, which adopts the following technical solution:
a DCS control system comprises a PID controller and an operation station; the PID controller comprises a processor and a memory having stored thereon a computer program that can be loaded by the processor and executed in accordance with any of the methods of the first aspect.
By adopting the technical scheme, the PID controller adjusts the first adjusting mechanism and/or the second adjusting mechanism corresponding to the preset area in the hearth according to the deviation value of the area temperature and the average temperature, so that the temperature of the hearth is uniform, the overall combustion efficiency of the hearth can be improved, the pulverized coal heat energy conversion rate is high in the power generation process, the energy-saving and consumption-reducing effects are realized, the generation of thermal NOx can be reduced, and the harm to the atmospheric environment is reduced.
In a third aspect, the present application provides a burner regulating system based on a temperature field, which adopts the following technical scheme:
a combustor adjusting system based on a temperature field comprises a DCS control system based on the second aspect, a first temperature measuring mechanism connected with the DCS control system, and a first adjusting mechanism and/or a second adjusting mechanism connected with the DCS control system;
the first temperature measuring mechanism is used for detecting the temperature of flue gas generated by combustion of a burner in the hearth, and calculating the zone temperature of each preset zone, the average temperature in the hearth and the deviation between the zone temperature and the average temperature through the PID controller.
Through adopting above-mentioned technical scheme, first temperature measurement mechanism detects each district's combustor burning temperature of predetermineeing, predetermine regional first adjustment mechanism and/or the second adjustment mechanism that corresponds in the furnace according to the deviation of regional temperature and average temperature and adjust, make furnace temperature even, can improve the holistic combustion efficiency of furnace, make the power generation in-process buggy heat energy conversion rate high, realize energy saving and consumption reduction's effect, and, can reduce the formation of heating power type NOx, and then reduce the harm to atmospheric environment.
In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solutions:
a computer-readable storage medium storing a computer program that can be loaded by a processor and that can perform any of the adjustment methods according to the first aspect.
By adopting the technical scheme, the readable storage medium stores the computer program for adjusting the first adjusting mechanism and/or the second adjusting mechanism corresponding to the preset area in the hearth according to the deviation amount of the area temperature and the average temperature, so that the hearth temperature is uniform, the overall combustion efficiency of the hearth can be improved, the pulverized coal heat energy conversion rate is high in the power generation process, the energy-saving and consumption-reducing effects are realized, the generation of thermal NOx can be reduced, and the harm to the atmospheric environment is reduced.
Drawings
FIG. 1 is a schematic view of a boiler combustion system according to an embodiment of the present application.
FIG. 2 is a flow chart of a combustor tuning method according to an embodiment of the present application.
FIG. 3 is a schematic diagram of furnace zone division embodying embodiments of the present application.
Fig. 4 is a schematic view of a front wall according to an embodiment of the present application.
FIG. 5 is a schematic view of a rear wall according to an embodiment of the present application.
Fig. 6 is a flowchart of an opening degree adjustment method for the first adjustment mechanism and the second adjustment mechanism according to the embodiment of the present application.
Fig. 7 is a flowchart of a first adjustment mechanism opening degree reduction method according to an embodiment of the present application.
Fig. 8 is a flowchart of a second adjustment mechanism opening degree reduction method according to the embodiment of the present application.
Fig. 9 is a flowchart of a method for reducing the opening degree of the first adjustment mechanism and the second adjustment mechanism according to the embodiment of the present application.
Fig. 10 is a flowchart of a first adjustment mechanism opening degree increasing method according to the embodiment of the present application.
Fig. 11 is a flowchart of a second adjustment mechanism opening degree increasing method according to the embodiment of the present application.
Fig. 12 is a flowchart of an opening degree increasing method for the first adjustment mechanism and the second adjustment mechanism according to the embodiment of the present application.
FIG. 13 is a flow chart of a method for adjusting the temperature of a wind-powder mixture according to an embodiment of the present application.
Fig. 14 is a schematic diagram of a DCS control system according to an embodiment of the present application.
FIG. 15 is a block schematic diagram of a combustor conditioning system in accordance with an embodiment of the present application.
Description of reference numerals: 1. a hearth; 11. a front wall; 12. a rear wall; 13. a first temperature measuring mechanism; 2. a coal mill; 21. an air supply device; 22. a pressure stabilizing mechanism; 3. a burner; 4. a coal feeding device; 5. a hot air generating mechanism; 51. a third pipeline; 52. a third adjustment mechanism; 6. a DCS control system; 61. a PID controller; 611. a memory; 612. a processor; 613. a communication bus; 62. an operating station; 7. a first conduit; 71. a first adjustment mechanism; 8. a second conduit; 81. a second adjustment mechanism; 9. a cold air generating mechanism; 91. a fourth conduit; 92. and a fourth adjustment mechanism.
Detailed Description
The present application is described in further detail below with reference to figures 1-15.
The embodiment of the application discloses a boiler combustion system, and with reference to fig. 1, the system comprises a hearth 1 and a coal pulverizer 2 of a boiler, wherein a plurality of burners 3 are installed in the hearth 1; the coal mill 2 comprises a plurality of feed inlets and a plurality of discharge outlets, wherein one feed inlet is communicated with a coal feeding device 4 used for conveying coal to the coal mill 2, the coal mill 2 grinds the coal into coal powder, the other feed inlet is communicated with an air supply device 21 used for blowing air to the coal mill 2, and an air-powder mixture consisting of the air and the coal powder is conveyed to the combustor 3 from the discharge outlet of the coal mill 2.
The coal mill 2 is characterized in that a plurality of first pipelines 7 are communicated with the discharge port, the first pipelines 7 are communicated with the combustor 3, a first adjusting mechanism 71 is installed on the first pipelines 7, the first adjusting mechanism 71 comprises a second pneumatic valve and a first electric valve, and the first pipelines 7 are controlled by the first adjusting mechanism 71 to convey the speed and the concentration of the air-powder mixture to the combustor 3.
The burner 3 is further communicated with a second pipeline 8 for conveying oxygen, a second adjusting mechanism 81 for adjusting the air inlet amount is installed on the second pipeline 8, the second adjusting mechanism 81 comprises a second electric valve, and the second adjusting mechanism 81 controls the amount of the oxygen conveyed to the burner 3 by the second pipeline 8.
The coal mill 2 is also communicated with a pressure stabilizing mechanism 22 for maintaining the stable internal pressure of the coal mill 2, and the pressure stabilizing mechanism 22 is used for discharging pressure to the coal mill 2, so that the possibility of explosion danger of the coal mill 2 due to the overlarge internal pressure is reduced, and the operation safety of the coal mill 2 is improved.
In the boiler combustion system, because the combustion efficiency of each combustor in the hearth 1 is different, the temperature in the hearth is uneven and the deviation is large, the combustion efficiency of the whole hearth 1 can be influenced, the pulverized coal heat energy conversion rate is low, the energy consumption is increased, NOx is easily generated, and the environment is polluted.
In order to solve the above problem, an embodiment of the present application discloses a method for adjusting a burner based on a temperature field, which is applied to the boiler combustion system, and with reference to fig. 2, the method mainly includes:
step S100, obtaining the zone temperatures of a plurality of preset zones in a hearth 1, wherein each preset zone is respectively provided with a plurality of layers of burners 3;
referring to fig. 3, a first temperature measuring mechanism 13 for measuring the temperature of the flue gas generated by the combustion of the burner 3 is installed on the inner wall of the furnace 1, and it is easy to understand that the temperature of the flue gas in the furnace 1 is used for reflecting the combustion efficiency of the pulverized coal of the burner 3 in the preset area.
The first temperature measuring mechanism 13 can adopt an acoustic wave temperature measuring sensor which has strong high temperature resistance, is particularly suitable for temperature measurement in high-temperature environments such as the hearth 1, and has more accurate measurement data.
The acoustic thermometric sensor has both a receiver and a transmitter, and thus multiple acoustic propagation paths can be formed. The internal space of the hearth 1 is divided into a plurality of preset regions according to the sound wave propagation paths of the sound wave temperature measuring sensors, specifically, each preset region must include at least one path intersection point, and the region temperature of each preset region is calculated according to the average value of the measured data of the sound wave temperature measuring sensors corresponding to all the sound wave propagation paths in the current preset region.
In this embodiment, the predetermined area of the front wall 11 is divided into areas Q1-Q4, and the predetermined area of the rear wall 12 is divided into areas H1-H4.
Referring to fig. 4 and 5, the furnace 1 includes a front wall 11 and a rear wall 12, two acoustic temperature measuring sensors are mounted on each of the walls of the furnace 1, and the front wall 11 and the rear wall 12 are respectively set to four preset regions according to an acoustic transmission path. Each preset area of the front wall 11 is provided with an upper layer of burners 3 and a lower layer of burners 3, and each area of the rear wall 12 is provided with an upper layer of burners 3, a middle layer of burners and a lower layer of burners 3. Of course, the number and the positions of the acoustic temperature measuring sensors and the burners can be adjusted according to actual conditions, and the embodiment is not particularly limited.
Referring to fig. 2, step S200: calculating the average temperature in the furnace 1 based on the zone temperatures of a plurality of preset zones;
in this embodiment, the average value of the zone temperatures of all the preset zones is obtained, which is the average temperature in the furnace 1.
Referring to fig. 2, step S300: respectively calculating the absolute value of the difference value between the area temperature and the average temperature of each preset area to obtain the deviation value of each preset area;
referring to fig. 2, step S400: adjusting the first adjusting mechanism 71 and/or the second adjusting mechanism 81 of the preset regions based on the deviation amount of each preset region;
referring to fig. 1, the first adjusting mechanism 71 and the second adjusting mechanism 81 are respectively corresponding to the burners 3, that is, each burner 3 corresponds to one first adjusting mechanism 71 and one second adjusting mechanism 81. The first adjusting mechanism 71 is used for adjusting the speed and the concentration of the air-powder mixture conveyed to the corresponding combustor 3 by the coal mill 2, and the second adjusting mechanism 81 is used for adjusting the amount of oxygen for combustion supporting introduced to the corresponding combustor 3.
After the adjustment of the first adjustment mechanism 71 and/or the second adjustment mechanism 81 of the preset area, step S100 is repeated.
Referring to fig. 5, step S400 includes:
step S410: judging whether the deviation amount of the current preset area is in a reasonable interval, if so, turning to step S420; if not, go to step S430;
step S420: keeping the opening degree instructions of the first adjusting mechanism 71 and the second adjusting mechanism 81 in the current preset area, and not adjusting;
step S430: comparing the area temperature of the current preset area with the average temperature, judging whether the area temperature of the current preset area is greater than the average temperature, if so, turning to the step S440; if not, the step S450 is carried out;
step S440: reducing the opening degree of the first adjusting mechanism 71 and/or the second adjusting mechanism 81 corresponding to the current layer combustor 3 in the current preset area;
referring to fig. 6 and 7, in step S440, the opening degree of only the first adjustment mechanism 71 may be reduced, only the second adjustment mechanism 81 may be reduced, or both the first adjustment mechanism 71 and the second adjustment mechanism 81 may be reduced at the same time, specifically as follows:
(1) when only the opening degree of the first adjustment mechanism 71 corresponding to the current layer burner 3 of the current preset area is decreased:
step S4410: judging whether the opening degree of the first adjusting mechanism 71 corresponding to the current layer burner 3 reaches the lower limit value, if not, turning to the step S4411; if yes, go to step S4412;
step S4411: reducing the opening degree of the first adjusting mechanism 71 corresponding to the current layer combustor 3 in the current preset area, and repeating the step S100;
step S4412: judging whether the current layer burner 3 is the last layer burner 3, if so, turning to the step S4413; if not, go to step S4414;
step S4413: generating alarm information;
step S4414: the step S4410 is repeated with the next layer burner 3 as the current layer burner 3.
Referring to fig. 6 and 8, (2) when the opening degree of the second adjustment mechanism 81 corresponding to the current-layer combustor 3 of the current preset region is decreased only:
step S4420: judging whether the opening degree of the second adjusting mechanism 81 corresponding to the current layer combustor 3 reaches the lower limit value, if not, turning to the step S4421; if yes, go to step S4422;
step S4421: reducing the opening degree of the second adjusting mechanism 81 corresponding to the current layer combustor 3, and repeating the step 100;
step S4422: judging whether the current layer burner 3 is the last layer burner 3, if so, turning to the step S4423; if not, go to step S4424;
step S4423: generating alarm information;
step S4424: the next layer burner 3 is regarded as the current layer burner 3, and step S4420 is repeated.
(3) When the opening degrees of the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the current layer burner 3 of the current preset area are reduced:
referring to fig. 6 and 9, step S4430: respectively judging whether the opening degrees of the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the current-layer combustor 3 reach the lower limit value, if the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the current-layer combustor 3 have adjusting mechanisms which do not reach the lower limit value, turning to step S4431; if the opening degrees of the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the current layer burner reach the lower limit value, the procedure goes to step S4432;
step S4431: reducing the opening degree of the adjusting mechanism which is corresponding to the current layer combustor 3 and does not reach the lower limit value, and repeating the step S100;
step S4432: judging whether the current layer burner 3 is the last layer burner 3, if so, turning to the step S4433; if not, go to step S4434;
step S4433: generating alarm information;
step S4434: the step S4430 is repeated with the next layer burner 3 as the current layer burner 3.
It should be noted that the next layer in the present embodiment does not have an orientation meaning, that is, the next layer burner 3 does not refer to the burner 3 located below and adjacent to the current layer burner 3.
Alternatively, referring to fig. 4 and 5, the next layer of burners 3 of the current layer of burners 3 is located above the current layer of burners 3 near the top of the furnace 1, and the last layer of burners 3 is the burners 3 near the top of the furnace 1.
Referring to fig. 6, in any of the above opening degree reduction methods, in one opening degree reduction operation, the opening degree of the adjustment mechanism corresponding to the burner 3 in the middle stage is adjusted from the burner 3 in the lowermost stage when the opening degree of the adjustment mechanism corresponding to the burner 3 in the bottom stage is adjusted to the limit value, and finally the opening degree of the adjustment mechanism corresponding to the burner 3 in the top stage is adjusted layer by layer in the order from bottom to top for the first adjustment mechanism 71 and the second adjustment mechanism 81 corresponding to the burner 3 in the preset region.
If the opening degree of the adjusting mechanism (the first adjusting mechanism 71 and/or the second adjusting mechanism 81) corresponding to the bottommost layer combustor 3 is less than the lower limit value, directly reducing the opening degree of the bottommost layer combustor 3, completing the current adjusting operation, and continuously acquiring the deviation amount between the area temperature and the average temperature of each preset area in the hearth 1; if the opening degree of the adjusting mechanism (the first adjusting mechanism 71 and/or the second adjusting mechanism 81) corresponding to the bottommost combustor 3 is already the lower limit value, it is continuously determined whether the opening degree of the adjusting mechanism corresponding to the adjacent combustor 3 above the bottommost combustor 3 reaches the lower limit value, and the subsequent steps are as described above and will not be described again.
Because the heat generated by burning the pulverized coal is transferred from bottom to top in each preset area, the adjusting mechanism corresponding to the burner 3 which is used for adjusting the lower layer firstly has a large influence on the combustion temperature of the pulverized coal in the preset area, and the adjustment on the combustion temperature of the pulverized coal is more obvious.
Referring to fig. 6 and 10, step S450: the opening degree of the first adjustment mechanism 71 and/or the second adjustment mechanism 81 corresponding to the current burner 3 of the current preset region is increased.
In step S450, the opening degree of only the first adjustment mechanism 71 may be increased, only the second adjustment mechanism 81 may be increased, or both the first adjustment mechanism 71 and the second adjustment mechanism 81 may be increased at the same time, specifically as follows:
(1) when only the opening degree of the first adjustment mechanism 71 corresponding to the current layer burner of the current preset area is increased:
referring to fig. 10, step S4510: judging whether the opening degree of the first adjusting mechanism 71 corresponding to the current layer burner reaches an upper limit value, if not, turning to a step S4511; if yes, go to step S4512;
step S4511: increasing the opening degree of the first adjusting mechanism 71 corresponding to the current layer combustor 3 in the current preset area, and repeating the step S100;
step S4512: judging whether the current layer combustor 3 is the last layer combustor 3, if so, turning to the step S4513; if not, go to step S4514;
step S4513: generating alarm information;
step S4514: the step S4510 is repeated with the next layer burner 3 as the current layer burner 3.
Referring to fig. 11, (2) when the opening degree of the second adjustment mechanism 81 corresponding to the current-layer combustor 3 of the current preset region is increased only:
step S4520: judging whether the opening degree of the second adjusting mechanism 81 corresponding to the current layer combustor 3 reaches the upper limit value, if not, turning to the step S4521; if yes, go to step S4522;
step S4521: increasing the opening degree of the second adjusting mechanism 81 corresponding to the current layer combustor 3, and repeating the step 100;
step S4522: judging whether the current layer combustor 3 is the last layer combustor 3, if so, turning to the step S4523; if not, go to step S4524;
step S4523: generating alarm information;
step S4524: the step S4520 is repeated with the next layer burner 3 as the current layer burner 3.
(3) When the opening degrees of the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the current layer burner 3 of the current preset area are increased:
referring to fig. 6 and 12, step S4530: respectively judging whether the opening degrees of the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the current-layer combustor 3 reach the upper limit value, if the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the current-layer combustor 3 have adjusting mechanisms which do not reach the upper limit value, turning to a step S4531; if the opening degrees of the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the current layer burner reach the upper limit value, the step S4532 is carried out;
step S4531: increasing the opening degree of the adjusting mechanism which does not reach the upper limit value and corresponds to the current layer combustor 3, and repeating the step S100;
step S4532: judging whether the current layer combustor 3 is the last layer combustor 3, if so, turning to the step S4533; if not, go to step S4534;
step S4533: generating alarm information;
step S4534: the step S4530 is repeated with the next layer burner 3 as the current layer burner 3.
Alternatively, referring to fig. 4 and 5, the next layer of burners 3 of the current layer of burners 3 is located above the current layer of burners 3 near the top of the furnace 1, and the last layer of burners 3 is the burners 3 near the top of the furnace 1. That is, in any of the above opening degree increasing methods, in the operation of once increasing the opening degree, the opening degree of the adjusting mechanism corresponding to the burner 3 at the bottom is adjusted to the limit value from the burner 3 at the bottom, the opening degree of the adjusting mechanism corresponding to the burner 3 at the middle is adjusted, and finally, the opening degree of the adjusting mechanism corresponding to the burner 3 at the top is adjusted layer by layer in the order from bottom to top for the first adjusting mechanism 71 and the second adjusting mechanism 81 corresponding to the burner 3 in the preset region.
If the opening degree of the adjusting mechanism (the first adjusting mechanism 71 and/or the second adjusting mechanism 81) corresponding to the bottommost layer combustor 3 is less than the upper limit value, directly increasing the opening degree of the bottommost layer combustor 3, completing the current adjusting operation, and continuously acquiring the deviation amount between the area temperature and the average temperature of each preset area in the hearth 1; if the opening degree of the adjusting mechanism corresponding to the bottommost combustor 3 is already the upper limit value, it is continuously determined whether the opening degree of the adjusting mechanism corresponding to the adjacent combustor 3 above the bottommost combustor 3 reaches the upper limit value, and the subsequent steps are as described above and are not repeated.
Referring to fig. 1, in some embodiments, the air supply device 21 includes a third pipeline 51 communicated with the feed port of the coal mill 2, and one end of the third pipeline 51 far from the coal mill 2 is communicated with a hot air generating mechanism 5 for supplying hot air to the third pipeline 51, in this embodiment, the hot air generating mechanism 5 includes a hot air generator, the hot air generator includes a blower and a heater, the heater heats air, and the blower conveys the heated air.
A third adjusting mechanism 52 for adjusting the amount of hot air entering the coal mill 2 is installed in the third pipeline 51, the third adjusting mechanism 52 includes a first pneumatic valve capable of completely closing or opening the third pipeline 51 and a third electric valve for finely adjusting the opening degree of the third pipeline 51, and the first pneumatic valve is installed on one side of the third electric valve close to the hot air generating mechanism 5.
When the third electric valve is opened, the hot air generating mechanism 5 blows hot air into the coal mill 2 through the third pipeline 51, the hot air is in heat transfer with coal dust in the coal mill 2, the coal dust is enabled to have a certain temperature, the coal dust with the certain temperature is combusted more fully when being combusted, and therefore the utilization rate of the coal dust is improved.
Referring to fig. 1, the air supply device 21 further includes a fourth pipeline 91 communicated with the third pipeline 51 between the third electric valve and the coal mill 2, and one end of the fourth pipeline 91, which is far away from the coal mill 2, is communicated with the cold air generating mechanism 9, in this embodiment, the cold air generating mechanism 9 includes an air cooler, and the fourth pipeline 91 is used for injecting cold air into the third pipeline 51, so that the cold air in the fourth pipeline 91 can neutralize and regulate the temperature of the hot air in the third pipeline 51.
A fourth adjustment mechanism 92 for adjusting the opening degree of the fourth pipe 91 is installed in the fourth pipe 91, and the fourth adjustment mechanism 92 includes a third air-operated valve capable of controlling the fourth pipe 91 to be completely closed or opened and a fourth electric valve for finely adjusting the opening degree of the fourth pipe 91. The opening of the fourth electrically operated valve is adjusted to control the amount of cold air injected into the third duct 51.
When the current temperature of wind-powder mixture is lower, the buggy burns inadequately in combustor 3, and when the current temperature of wind-powder mixture was higher, the burning in the pipeline back seat mill is easily gone forward to wind-powder mixture, has increased the risk of equipment safe operation, and when the current temperature of wind-powder mixture was in predetermineeing the temperature interval, just can promote the combustion efficiency of buggy in combustor 3.
The temperature of the air-powder mixture entering the combustor 3 needs to be adjusted to be within a reasonable temperature range, so that the pulverized coal can be fully combusted in the combustor. Thus, referring to fig. 11, the method further comprises the steps of:
step S500: acquiring the current temperature of the air-powder mixture entering the combustor 3;
referring to fig. 1 and 11, all be provided with a plurality of second temperature measurement mechanisms in the first pipeline 7, second temperature measurement mechanism is used for detecting the current temperature of wind powder mixture in the first pipeline 7, second temperature measurement mechanism sets up the position that every first pipeline 7 is different, second temperature measurement mechanism fully detects the current temperature of the wind powder mixture of different positions department in the first pipeline 7, thereby the accuracy of the current temperature detection of wind powder mixture in the first pipeline 7 has been improved, in this embodiment, second temperature measurement mechanism includes infrared temperature sensor, all install 6 infrared temperature sensor in every first pipeline 7.
Referring to fig. 13, step S600: judging whether the current temperature is within a preset temperature range, if so, turning to the step S700; if not, go to step S800;
referring to fig. 11, step S700: keeping the opening degree instructions of the current third adjusting mechanism 52 and the current fourth adjusting mechanism 92 of the coal mill 2, and not adjusting;
referring to fig. 11, step S800: adjusting the third adjustment mechanism 52 and/or the fourth adjustment mechanism 92;
the third adjusting mechanism 52 is used for adjusting the amount of hot air entering the coal mill 2, the fourth adjusting mechanism 92 is used for adjusting the amount of cold air entering the coal mill 2, and if the current temperature is higher than a preset temperature range, the opening degree of the fourth adjusting mechanism 92 is increased, and the opening degree of the third adjusting mechanism 52 is reduced; if the current temperature is lower than the preset temperature range, the opening degree of the third adjusting mechanism 52 is increased, and the opening degree of the fourth adjusting mechanism 92 is decreased.
After the third adjustment mechanism 52 and/or the fourth adjustment mechanism 92 are adjusted, step S500 is repeated.
Referring to fig. 14, the DCS control system 6 includes a PID controller 61 and an operation station 62, the PID controller 61 includes a memory 611, a processor 612 and a communication bus 613, the memory 611 stores thereon a computer program capable of being loaded by the processor 612 and executing the temperature field-based burner adjusting method, and the memory 611 and the processor 612 are connected by the communication bus 613.
The memory 611 may be used to store instructions, programs, code sets, or instruction sets. The memory 611 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function, and instructions for implementing the temperature field based burner adjustment method provided by the above embodiments, and the like; the storage data area may store data and the like involved in the temperature field-based burner adjustment method provided by the above-described embodiment.
The processor 612 may include one or more processing cores. The processor 612 performs various functions and processes data of the present application by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 611, invoking data stored in the memory 611. The processor 612 may be at least one of an application specific integrated circuit, a digital signal processor, a digital signal processing device, a programmable logic device, a field programmable gate array, and a central processing unit. It is understood that the electronic devices for implementing the functions of the processor 612 may be other devices, and the embodiments of the present application are not limited in particular.
The embodiment of the application also discloses a combustor adjusting system based on the temperature field, and the combustor adjusting system comprises a DCS control system 6 and a boiler combustion system by referring to FIGS. 14 and 15.
The PID controller 61 is electrically connected with the first temperature measuring mechanism 13, the first adjusting mechanism 71 and the second adjusting mechanism 81, the first temperature measuring mechanism 13 transmits the detected preset region temperature data to the PID controller 61, and the PID controller 61 calculates the deviation amount between the region temperature and the average temperature of the preset region. When the deviation amount of the zone temperature detected by the first temperature measuring means 13 is not within the reasonable interval, the PID controller 61 controls the first adjusting means 71 and the second adjusting means 81 to adjust the opening degree.
The PID controller 61 is further electrically connected to the second temperature measuring mechanism, the third adjusting mechanism 52, and the fourth adjusting mechanism 92, the second temperature measuring mechanism transmits the detected temperature data in the first pipeline 7 to the PID controller 61, and when the temperature detected by the second temperature measuring mechanism is not within the preset temperature range, the PID controller 61 controls the third adjusting mechanism 52 and the fourth adjusting mechanism 92 to adjust the opening degree.
The embodiment of the present application further discloses a computer readable storage medium, which stores a computer program that can be loaded by the processor 612 and execute the temperature field-based burner adjusting method provided by the above embodiment.
In this embodiment, the computer readable storage medium may be a tangible device that retains and stores instructions for use by an instruction execution device. The computer readable storage medium may be, but is not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any combination of the foregoing. In particular, the computer readable storage medium may be a portable computer diskette, a hard disk, a U-disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a podium random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, an optical disk, a magnetic disk, a mechanical coding device, and any combination thereof.
The computer program in the present embodiment includes a program code for executing the method shown in fig. 2, and the program code may include instructions corresponding to the method steps provided in the foregoing embodiments. The computer program may be downloaded to the respective computing/processing device from a computer-readable storage medium, or may be downloaded to an external computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network. The computer program may execute entirely on the user's computer, as a stand-alone software package.
In addition, it is to be understood that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A method of combustor tuning based on a temperature field, comprising:
dividing the inner area of the hearth based on the sound wave propagation paths of a plurality of sound wave temperature measuring sensors arranged on the inner wall of the hearth to obtain a plurality of preset areas, wherein the sound wave temperature measuring sensors are provided with a receiver and a transmitter simultaneously, so that a plurality of sound wave propagation paths are formed, and dividing the inner space of the hearth into a plurality of preset areas according to the sound wave propagation paths of the sound wave temperature measuring sensors;
acquiring the zone temperature of a plurality of preset zones in a hearth, wherein each preset zone is respectively provided with a plurality of layers of burners, the zone temperature of each preset zone is determined based on sound wave signals transmitted between sound wave temperature measuring sensors, each preset zone comprises at least one path intersection point, and the zone temperature of each preset zone is calculated according to the average value of the measured data of the sound wave temperature measuring sensors corresponding to all sound wave propagation paths in the current preset zone;
calculating an average temperature in the furnace based on the zone temperatures of the plurality of preset zones;
respectively calculating the absolute value of the difference value between the area temperature and the average temperature of each preset area to obtain the deviation value of each preset area;
adjusting the first adjusting mechanism and/or the second adjusting mechanism of each preset area based on the deviation amount of each preset area, and judging whether the deviation amount of the current preset area is in a reasonable interval or not;
if not, comparing the area temperature of the current preset area with the average temperature;
if the area temperature of the current preset area is greater than the average temperature, reducing the opening degree of a first adjusting mechanism and/or a second adjusting mechanism corresponding to a current layer combustor of the current preset area, and repeating the step of obtaining the area temperatures of a plurality of preset areas in the hearth;
if the area temperature of the current preset area is lower than the average temperature, increasing the opening degree of a first adjusting mechanism and/or a second adjusting mechanism corresponding to a current layer combustor of the current preset area, and repeating the step of obtaining the area temperatures of a plurality of preset areas in the hearth;
the first adjusting mechanism and the second adjusting mechanism are in one-to-one correspondence with the burners, the first adjusting mechanism is used for adjusting the speed and the concentration of the air-powder mixture entering the corresponding burner, and the second adjusting mechanism is used for adjusting the amount of oxygen for introducing combustion supporting to the corresponding burner;
when the opening degrees of a first adjusting mechanism and a second adjusting mechanism corresponding to the current-layer combustor in the current preset area are reduced, respectively judging whether the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach a lower limit value;
if the adjusting mechanism which does not reach the lower limit value exists in the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor, reducing the opening degree of the adjusting mechanism which does not reach the lower limit value and corresponds to the current-layer combustor, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach the lower limit value, judging whether the current-layer combustor is the last-layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeatedly and respectively judging whether the opening degrees of a first adjusting mechanism and a second adjusting mechanism corresponding to the current-layer combustor reach a lower limit value;
when the opening degrees of a first adjusting mechanism and a second adjusting mechanism corresponding to a current layer combustor in the current preset area are increased, respectively judging whether the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current layer combustor reach an upper limit value;
if the adjusting mechanism which does not reach the upper limit value exists in the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor, the opening degree of the adjusting mechanism which does not reach the upper limit value and corresponds to the current-layer combustor is increased, and the step of obtaining the zone temperatures of a plurality of preset zones in the hearth is repeated;
if the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach the upper limit value, judging whether the current-layer combustor is the last-layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeatedly and respectively judging whether the opening degrees of a first adjusting mechanism and a second adjusting mechanism corresponding to the current-layer combustor reach an upper limit value or not;
and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth.
2. The method according to claim 1, characterized in that when only the opening degree of the first adjusting mechanism corresponding to the current-layer burner of the current preset area is reduced, whether the opening degree of the first adjusting mechanism corresponding to the current-layer burner reaches a lower limit value is judged;
if the opening degree of the first adjusting mechanism does not reach the lower limit value, reducing the opening degree of the first adjusting mechanism corresponding to the burner at the current layer, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degree of the first adjusting mechanism reaches a lower limit value, judging whether the current layer combustor is the last layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeatedly judging whether the opening of the first adjusting mechanism corresponding to the current-layer combustor reaches a lower limit value;
when the opening degree of a second adjusting mechanism corresponding to the current layer combustor in the current preset area is only reduced, judging whether the opening degree of the second adjusting mechanism corresponding to the current layer combustor reaches a lower limit value;
if the opening degree of the second adjusting mechanism does not reach the lower limit value, reducing the opening degree of the second adjusting mechanism corresponding to the burner at the current layer, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degree of the second adjusting mechanism reaches the lower limit value, judging whether the current layer combustor is the last layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeatedly judging whether the opening degree of a second adjusting mechanism corresponding to the current-layer combustor reaches a lower limit value;
when the opening degrees of a first adjusting mechanism and a second adjusting mechanism corresponding to the current-layer combustor in the current preset area are reduced, respectively judging whether the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach a lower limit value;
if the adjusting mechanism which does not reach the lower limit value exists in the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor, reducing the opening degree of the adjusting mechanism which does not reach the lower limit value and corresponds to the current-layer combustor, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach the lower limit value, judging whether the current-layer combustor is the last-layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeating the step of respectively judging whether the opening degrees of the first adjusting mechanism and the second adjusting mechanism corresponding to the current-layer combustor reach the lower limit value.
3. The method according to claim 1, characterized in that when only the opening degree of the first adjusting mechanism corresponding to the current-floor burner of the current preset area is increased, whether the opening degree of the first adjusting mechanism corresponding to the current-floor burner reaches an upper limit value is judged;
if the opening degree of the first adjusting mechanism does not reach the upper limit value, increasing the opening degree of the first adjusting mechanism corresponding to the burner at the current layer, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degree of the first adjusting mechanism reaches the upper limit value, judging whether the current layer combustor is the last layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeating the step of judging whether the opening degree of the first adjusting mechanism corresponding to the current-layer combustor reaches the upper limit value or not;
when only the opening degree of a second adjusting mechanism corresponding to the current-layer combustor in the current preset area is increased, judging whether the opening degree of the second adjusting mechanism corresponding to the current-layer combustor reaches an upper limit value;
if the opening degree of the second adjusting mechanism does not reach the upper limit value, increasing the opening degree of the second adjusting mechanism corresponding to the burner at the current layer, and repeating the step of obtaining the zone temperatures of a plurality of preset zones in the hearth;
if the opening degree of the second adjusting mechanism reaches the upper limit value, judging whether the current layer combustor is the last layer combustor;
if the current layer of combustor is the last layer of combustor, generating alarm information;
and if the current-layer combustor is not the last-layer combustor, taking the next-layer combustor as the current-layer combustor, and repeating the step of judging whether the opening degree of the second adjusting mechanism corresponding to the current-layer combustor reaches the upper limit value or not.
4. The method according to claim 2 or 3, wherein the next layer of burners of the current layer of burners is located above the current layer of burners, and the last layer of burners is burners near the top of the furnace.
5. The method of claim 1, further comprising:
acquiring the current temperature of the air-powder mixture entering the combustor;
judging whether the current temperature is in a preset temperature interval or not;
if not, adjusting a third adjusting mechanism and/or a fourth adjusting mechanism, wherein the third adjusting mechanism is used for adjusting the amount of hot air entering the coal mill, and the fourth adjusting mechanism is used for adjusting the amount of cold air entering the coal mill;
repeating the step of obtaining the current temperature of the air-powder mixture entering the burner.
6. The DCS control system is characterized by comprising a PID controller and an operation station; the PID controller comprises a processor and a memory, on which a computer program is stored which can be loaded by the processor and which executes a regulation method according to any of claims 1 to 5.
7. A burner regulating system based on a temperature field, comprising the DCS control system of claim 6 and a first temperature measuring mechanism connected to the DCS control system, further comprising a first regulating mechanism and/or a second regulating mechanism connected to the DCS control system;
the first temperature measuring mechanism is used for detecting the temperature of flue gas generated by combustion of a burner in the hearth, and calculating the zone temperature of each preset zone, the average temperature in the hearth and the deviation between the zone temperature and the average temperature of each preset zone through the PID controller.
8. A computer-readable storage medium, in which a computer program is stored which can be loaded by a processor and which executes an adaptation method as claimed in any one of claims 1 to 5.
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| PCT/CN2022/089110 WO2022262425A1 (en) | 2021-06-15 | 2022-04-25 | Temperature field-based burner adjustment method, system, dcs system, and medium |
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| JPH08121759A (en) * | 1994-10-27 | 1996-05-17 | Hitachi Ltd | Method of controlling operation of furnace for boiler and apparatus therefor |
| CN103244964B (en) * | 2013-04-27 | 2015-04-22 | 国家电网公司 | Combustion optimization control system based on acoustically-measured hearth temperature field, and control method thereof |
| CN106678782A (en) * | 2015-11-06 | 2017-05-17 | 浙江浙能技术研究院有限公司 | Bowl-shaped or W-shaped wind distributing method for rotational flow combustion of large power station coal-fired boiler |
| CN106269197B (en) * | 2016-08-01 | 2018-09-14 | 中国神华能源股份有限公司 | A kind of pulverizer outlet temperature control system and its control method |
| DE102018202063A1 (en) * | 2018-02-09 | 2019-08-14 | Thyssenkrupp Ag | Calciner of a cement manufacturing plant and method of operating a calciner |
| CN111006239A (en) * | 2019-11-14 | 2020-04-14 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Method for automatically adjusting up-down position of flame center of hearth of front-and-back wall opposed pulverized coal fired boiler |
| CN112228901B (en) * | 2020-11-09 | 2023-11-28 | 烟台龙源电力技术股份有限公司 | Online adjustment system and method for secondary air distribution of boiler |
| CN112325330A (en) * | 2020-11-23 | 2021-02-05 | 华能国际电力股份有限公司 | Balanced combustion system of hedging coal-fired boiler and operation method |
| CN113251435B (en) * | 2021-06-15 | 2021-11-09 | 天津国能津能滨海热电有限公司 | Combustor adjusting method and system based on temperature field, DCS (distributed control System) and medium |
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