CN117574630A - Thermal calculation check control method and device based on flame center adjustment mode - Google Patents
Thermal calculation check control method and device based on flame center adjustment mode Download PDFInfo
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- 238000004364 calculation method Methods 0.000 title claims abstract description 371
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 88
- 238000012795 verification Methods 0.000 claims abstract description 75
- 239000000779 smoke Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
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Abstract
The invention provides a thermal calculation check control method and device based on a flame center adjusting mode, and relates to the technical field of automatic control. The method comprises the following steps: after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth; if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature; and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check. The apparatus performs the above method. The method and the device provided by the embodiment of the invention can realize the automatic control of thermal calculation check of the corresponding boiler type based on the flame center adjusting mode.
Description
Technical Field
The invention relates to the technical field of automatic control, in particular to a thermal calculation checking control method and device based on a flame center adjusting mode.
Background
The utility boiler is the prime mover of the coal-fired unit, and the operation performance of the utility boiler depends on the good design, manufacture, operation and maintenance of the boiler, and the good design is the most critical. The boiler design calculation mainly comprises thermodynamic calculation, intensity calculation, smoke resistance calculation and hydrodynamic calculation, and is called as four-large boiler design calculation. The thermodynamic calculation covers the design and arrangement work of the heating surface of the boiler, is the basis of other calculation work such as hydrodynamic calculation, intensity calculation, smoke resistance calculation and the like, and is the core of the calculation work of the boiler.
In the process of boiler thermodynamic calculation, from heat balance calculation to each heat transfer unit, a method of firstly supposing, then checking and successive approximation is adopted, and the main reasons are that besides parameter coupling in the calculation process, calculation of the heat transfer process is needed to be carried out on the heating surfaces along the flue gas flow in sequence in boiler thermodynamic calculation, the flow direction of the flue gas is different from the trend of working medium in the heating surfaces, and the part of the previous calculation in the process of less thermodynamic calculation can be completed by using the follow-up calculation results, for example:
(1) The exhaust gas temperature during the calculation of the heat balance of the boiler can be obtained after the calculation of the whole boiler is completed;
(2) When the hearth is calculated, only the input fuel is an original condition under which no chemical reaction occurs, the combustion air temperature which is firstly assumed to be a constant value is preheated by the air preheater, the implicitly assumed furnace water inlet temperature is preheated by the economizer, and the two parameters are obtained after the heat transfer calculation of the heating surface of the air preheater and the heating surface of the economizer in the follow-up process is completed;
(3) The inlet steam temperature required by the heat transfer calculation of the high-temperature superheater can be obtained after the calculation of the subsequent low-temperature superheater is completed; the inlet steam temperature required by the heat transfer calculation of the high-temperature reheater can be obtained after the heat transfer calculation of the subsequent low-temperature reheater is completed.
The thermodynamic calculation process of the whole boiler is a heat transfer balance solving problem of a group of complex series-parallel heat transfer components, parameters are firstly assumed to carry out heat transfer calculation when each stage of heating surface is calculated, and then the calculated parameters are used for correcting the assumed parameters in a reverse way; sometimes the front heating surface needs to use the calculation result of the rear heating surface parameters; sometimes, parameters of the front heating surface are needed for the rear heating surface, and the whole process consists of a plurality of nested processes of firstly supposing, then correcting and repeatedly calculating iterative call. The prior art thermodynamic calculation check control method cannot be adapted to this type of boiler with oscillating burners, due to the different boiler types.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a thermal calculation check control method and a thermal calculation check control device based on a flame center adjusting mode, which can at least partially solve the problems in the prior art.
On one hand, the invention provides a thermal calculation check control method based on a flame center adjusting mode, which comprises the following steps:
after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth;
if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature;
and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
Wherein, furnace flame center check calculation includes:
if the reheat steam temperature is higher than the preset reheat steam temperature set value and reaches the preset value, the flame center is lowered, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches the preset value interval;
if the reheat steam temperature is determined to be lower than the preset reheat steam temperature set value and reaches a preset value, the flame center is increased, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches a preset value interval; one end value of the preset value interval is obtained by subtracting the preset value from the preset reheat steam temperature set value, and the other end value of the preset value interval is obtained by adding the preset value to the preset reheat steam temperature set value.
Wherein lowering or raising the flame center comprises:
lowering the flame center by reducing burner tilt angle control;
the flame center is increased by increasing burner tilt angle control.
Wherein said lowering said flame center by reducing burner tilt angle control comprises:
the lowering of the flame center by reducing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt minimum);
the increasing the flame center by increasing burner tilt angle control includes:
increasing the flame center by increasing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt maximum).
Wherein determining that the thermal balance check calculation passes includes:
and (3) comparing the total heat absorption capacity of each heating surface of the boiler with the heat release capacity of the fuel in the boiler, and if the comparison result value is determined to be within the preset error value, determining that the heat balance check calculation is passed.
The thermal calculation check control method based on the flame center adjusting mode further comprises the following steps:
and if the comparison result value is determined to be outside the preset error value, determining that the heat balance checking calculation is not passed, resetting the precision of the heating surfaces of all stages, and executing the heat balance calculation.
On the one hand, the invention provides a thermal calculation checking control device based on a flame center adjusting mode, which comprises the following components:
the first calculation unit is used for carrying out furnace flame center checking calculation after the low-temperature reheater and the additional heating surface thereof are subjected to thermal calculation;
the second calculation unit is used for sequentially executing reheat steam continuity check calculation, economizer and additional heating surface thermal calculation, steam side continuity check calculation, water side continuity check calculation, air preheater thermal calculation and exhaust gas temperature check calculation if the fact that the hearth flame center check calculation passes is determined;
and the third calculation unit is used for executing heat balance check calculation if the exhaust gas temperature check calculation is determined to pass, and completing heat calculation check if the heat balance check calculation is determined to pass.
In yet another aspect, an embodiment of the present invention provides a computer device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following method when executing the computer program:
after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth;
if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature;
and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
An embodiment of the present invention provides a computer-readable storage medium including:
the computer readable storage medium stores a computer program which, when executed by a processor, performs the following method:
after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth;
if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature;
and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
Embodiments of the present invention also provide a computer program product comprising a computer program which, when executed by a processor, performs the following method:
after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth;
if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature;
and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
According to the thermal calculation checking control method and device based on the flame center adjusting mode, the furnace flame center checking calculation is carried out after the thermal calculation of the low-temperature reheater and the additional heating surface is completed; if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature; if the flue gas temperature check calculation is confirmed to pass, the heat balance check calculation is executed, and if the heat balance check calculation is confirmed to pass, the heat calculation check is completed, so that the heat calculation check automatic control on the corresponding boiler type based on the flame center adjustment mode can be realized.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
fig. 1 is a schematic flow chart of a thermal calculation check control method based on a flame center adjustment mode according to an embodiment of the invention.
Fig. 2 is a schematic flow chart of a thermal calculation check control method based on a flame center adjustment mode according to another embodiment of the present invention.
FIG. 3 is a schematic flow chart of flame center control by burner tilt angle according to another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a thermal calculation check control device based on a flame center adjustment mode according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a physical structure of a computer device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. The exemplary embodiments of the present invention and their descriptions herein are for the purpose of explaining the present invention, but are not to be construed as limiting the invention. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
Fig. 1 is a schematic flow chart of a thermal calculation check control method based on a flame center adjustment mode according to an embodiment of the present invention, as shown in fig. 1, where the thermal calculation check control method based on a flame center adjustment mode according to an embodiment of the present invention includes:
step S1: and after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth.
Step S2: and if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the reheat steam continuity verification calculation, the economizer and the heating surface heating power calculation, the steam side continuity verification calculation, the water side continuity verification calculation, the air preheater heating power calculation and the exhaust gas temperature verification calculation.
Step S3: and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
In the step S1, the device performs the furnace flame center checking calculation after the thermal calculation of the low-temperature reheater and the additional heating surface is completed. The apparatus may be a computer device or the like that performs the method. In the technical scheme, the acquisition, storage, use, processing and the like of the data all accord with related regulations. As shown in fig. 2, the relevant contents of the reduced-temperature water check calculation are not discussed in the present application.
The furnace flame center checking calculation comprises the following steps:
if the reheat steam temperature is higher than the preset reheat steam temperature set value and reaches the preset value, the flame center is lowered, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches the preset value interval;
if the reheat steam temperature is determined to be lower than the preset reheat steam temperature set value and reaches a preset value, the flame center is increased, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches a preset value interval; one end value of the preset value interval is obtained by subtracting the preset value from the preset reheat steam temperature set value, and the other end value of the preset value interval is obtained by adding the preset value to the preset reheat steam temperature set value. The preset reheat steam temperature set value and the preset numerical value can be set independently according to actual conditions, and the preset numerical value can be selected to be 5 ℃.
As shown in fig. 3, the thermal calculation of the furnace and its additional heating surfaces and subsequent steps are not further described in the method of the embodiments of the present invention.
Lowering or raising the flame center, comprising:
lowering the flame center by reducing burner tilt angle control;
the flame center is increased by increasing burner tilt angle control.
The lowering of the flame center by reducing burner tilt angle control includes:
the lowering of the flame center by reducing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt minimum);
the increasing the flame center by increasing burner tilt angle control includes:
increasing the flame center by increasing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt maximum). The minimum value of the swing angle swing of the burner and the maximum value of the swing angle swing of the burner are determined according to the basic performance of the burner.
The relationship between the swing angle and the furnace thermodynamic calculation is described as follows:
x b the relative height of the burner is expressed as the ratio of the central elevation of the burner to the height of the hearth, deltax b Representing the amount of change in the position of the flame center of the furnace in the furnace thermodynamic calculation.
Swing angle and Δx b The relationship is as follows:
1) Δx at burner level b Is 0;
2) When the burner swings upwards, every 20 degrees of swinging, deltax b An increase of 0.1;
3) When the burner swings downwards, every 20 degrees of swinging, deltax b A decrease of 0.1;
4) When the burner swings up and down for other angles, deltax is the same as Deltax b Taking an insertion value.
x b Calculated according to the following expression:
wherein B is i Indicating the fuel quantity of the i-th burner;
H bi representing the i-th burner center elevation;
h represents the height of the hearth and is closely related to the arrangement mode of the hearth;
b represents the fuel quantity of the boiler.
x flm Calculated according to the following formula:
x flm ＝x b +Δx
wherein x is flm The relative height of the flame center is determined by the burner center height and whether the burner is oscillating.
The M value representing the effect of flame center height is:
wherein V is daf The dry ash-free base component of the coal is obtained by assaying the coal.
In the step S2, if the device determines that the verification calculation of the flame center of the furnace passes, the reheat steam continuity verification calculation, the economizer and the additional heating surface thermal calculation, the steam side continuity verification calculation, the water side continuity verification calculation, the air preheater thermal calculation and the exhaust gas temperature verification calculation are sequentially performed. The flue gas temperature check calculation includes:
if the smoke exhaust temperature is higher than the preset smoke exhaust temperature by more than the preset value, reducing the smoke exhaust temperature, and re-executing the heat balance calculation; the preset smoke exhaust temperature value and the preset value can be set independently according to actual conditions.
And if the smoke exhaust temperature is determined to be lower than the preset smoke exhaust temperature by more than the preset value, the smoke exhaust temperature is increased, and the step of heat balance calculation is re-executed. The flue gas temperature check is performed on the flue gas temperature initially assumed in the calculation of the boiler heat balance. After the thermal calculation of the heating surface of the last stage of the boiler, namely the air preheater, is completed, the exhaust gas temperature can be obtained, and the exhaust gas temperature is compared and checked with the preset exhaust gas temperature: if the calculated exhaust gas temperature is higher than the preset exhaust gas temperature, the exhaust gas temperature needs to be reduced, and the calculated exhaust gas temperature is returned to the heat balance module for recalculation; otherwise, the smoke exhaust temperature needs to be increased, the smoke exhaust temperature is returned to the heat balance module for recalculation until the difference between the smoke exhaust temperature and the preset smoke exhaust temperature is not more than +/-10 ℃, and at the moment, the smoke exhaust temperature checking calculation is confirmed to pass.
Specific implementation manners of reheat steam continuity check calculation, economizer and additional heating surface thermal calculation, steam side continuity check calculation, water side continuity check calculation, air preheater thermal calculation, exhaust gas temperature check calculation and steering room thermal calculation of the embodiment of the invention are not described.
In the step S3, the device executes the thermal balance check calculation if it is determined that the exhaust gas temperature check calculation passes, and completes the thermal calculation check if it is determined that the thermal balance check calculation passes. Determining a thermal balance check calculation pass includes:
and (3) comparing the total heat absorption capacity of each heating surface of the boiler with the heat release capacity of the fuel in the boiler, and if the comparison result value is determined to be within the preset error value, determining that the heat balance check calculation is passed. The preset error value can be set independently according to actual conditions. The total check of the thermodynamic calculation process meets the following requirements:
(1) Total heat = total steam-water heat + total combustion air heat, the precision meets the requirements.
(2) And parameters of each heating surface are smoothly connected along the inlet to the outlet of the steam-water system, and the precision meets the requirements.
(3) And the parameters of all heating surfaces are smoothly connected along the hot air from the combustion air inlet to the hearth inlet, and the precision meets the requirements.
The total heat release amount of the heat release side is the difference between the heat quantity of the fuel and the heat quantity of the combustion air from the inlet to the outlet of the boiler; the total heat absorption amount of the steam-water system is the difference between the heat of the steam-water working medium inlet and the heat of the steam outlet; the total amount of heat absorbed by the combustion air is the difference in heat from the air preheater inlet to the furnace combustion air inlet.
The thermal calculation check control method based on the flame center adjusting mode further comprises the following steps:
and if the comparison result value is determined to be outside the preset error value, determining that the heat balance checking calculation is not passed, resetting the precision of the heating surfaces of all stages, and executing the heat balance calculation. The preset error value of the thermal calculation of each heating surface can be halved, and then the thermal balance module is returned to calculate again until all calculation works meet the requirements.
In the process of realizing the method of the embodiment of the invention, the heating surfaces of the passing and reheating device are required to be adjusted, and the method is described as follows:
for the superheater, if the amount of the desuperheated water cannot be adjusted, if the main steam temperature cannot meet the requirement, whether to adjust the heating surface area is determined according to a preset variable of whether the superheater adjusts the heating surface. If the variable is true, the heating surface needs to be adjusted, and the heating surface area is increased in a same way for design calculation, and the adjustment position is the final stage of superheater until the superheated steam temperature accords with the preset temperature. Otherwise, for checking calculation, the heating surface is not moved, and the result is directly output, which is the steam parameter which can be actually achieved by the boiler under the current condition.
For the heating surface of the reheater, if the temperature regulating means is used up, for example, the flame center swings to the maximum position or the flue gas baffle is at the maximum position or both, and the reheat steam temperature cannot meet the requirement, whether to regulate the heating surface area is determined according to a preset variable of whether the reheater regulates the heating surface. If the variable is true, the heating surface needs to be adjusted, and the heating surface area is increased in a same ratio for design calculation, and the adjustment position is the final-stage reheater until the reheat steam temperature accords with the preset temperature. Otherwise, for checking calculation, the heating surface is not moved, and the result is directly output, which is the steam parameter which can be actually achieved by the boiler under the current condition.
According to the thermal calculation checking control method based on the flame center adjusting mode, the furnace flame center checking calculation is carried out after the thermal calculation of the low-temperature reheater and the additional heating surface is completed; if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature; if the flue gas temperature check calculation is confirmed to pass, the heat balance check calculation is executed, and if the heat balance check calculation is confirmed to pass, the heat calculation check is completed, so that the heat calculation check automatic control on the corresponding boiler type based on the flame center adjustment mode can be realized.
Further, the furnace flame center checking calculation comprises the following steps:
if the reheat steam temperature is higher than the preset reheat steam temperature set value and reaches the preset value, the flame center is lowered, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches the preset value interval; the description of the embodiments may be referred to above, and will not be repeated.
If the reheat steam temperature is determined to be lower than the preset reheat steam temperature set value and reaches a preset value, the flame center is increased, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches a preset value interval; one end value of the preset value interval is obtained by subtracting the preset value from the preset reheat steam temperature set value, and the other end value of the preset value interval is obtained by adding the preset value to the preset reheat steam temperature set value. The description of the embodiments may be referred to above, and will not be repeated.
Further, lowering or raising the flame center includes:
lowering the flame center by reducing burner tilt angle control; the description of the embodiments may be referred to above, and will not be repeated.
The flame center is increased by increasing burner tilt angle control. The description of the embodiments may be referred to above, and will not be repeated.
Further, the lowering the flame center by reducing burner tilt angle control includes:
the lowering of the flame center by reducing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt minimum); the description of the embodiments may be referred to above, and will not be repeated.
The increasing the flame center by increasing burner tilt angle control includes:
increasing the flame center by increasing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt maximum). The description of the embodiments may be referred to above, and will not be repeated.
Further, determining that the thermal balance check calculation passes includes:
and (3) comparing the total heat absorption capacity of each heating surface of the boiler with the heat release capacity of the fuel in the boiler, and if the comparison result value is determined to be within the preset error value, determining that the heat balance check calculation is passed. The description of the embodiments may be referred to above, and will not be repeated.
Further, the thermal calculation check control method based on the flame center adjustment mode further comprises the following steps:
and if the comparison result value is determined to be outside the preset error value, determining that the heat balance checking calculation is not passed, resetting the precision of the heating surfaces of all stages, and executing the heat balance calculation. The description of the embodiments may be referred to above, and will not be repeated.
Fig. 4 is a schematic structural diagram of a thermal computing and checking control device based on a flame center adjustment mode according to an embodiment of the present invention, as shown in fig. 4, where the thermal computing and checking control device based on a flame center adjustment mode according to an embodiment of the present invention includes a first computing unit 401, a second computing unit 402, and a third computing unit 403, where:
the first calculation unit 401 is used for performing furnace flame center checking calculation after the low-temperature reheater and the additional heating surface thereof are subjected to thermal calculation; the second calculation unit 402 is configured to sequentially perform reheat steam continuity check calculation, economizer and additional heating surface thermal calculation, steam side continuity check calculation, water side continuity check calculation, air preheater thermal calculation, and exhaust gas temperature check calculation if it is determined that the furnace flame center check calculation passes; the third calculation unit 403 is configured to perform a thermal balance check calculation if it is determined that the exhaust gas temperature check calculation passes, and complete a thermal calculation check if it is determined that the thermal balance check calculation passes.
Specifically, a first calculation unit 401 in the device is used for performing furnace flame center checking calculation after the thermal calculation of the low-temperature reheater and the additional heating surface thereof is completed; the second calculation unit 402 is configured to sequentially perform reheat steam continuity check calculation, economizer and additional heating surface thermal calculation, steam side continuity check calculation, water side continuity check calculation, air preheater thermal calculation, and exhaust gas temperature check calculation if it is determined that the furnace flame center check calculation passes; the third calculation unit 403 is configured to perform a thermal balance check calculation if it is determined that the exhaust gas temperature check calculation passes, and complete a thermal calculation check if it is determined that the thermal balance check calculation passes.
According to the thermal calculation checking control method based on the flame center adjusting mode, the furnace flame center checking calculation is carried out after the thermal calculation of the low-temperature reheater and the additional heating surface is completed; if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature; if the flue gas temperature check calculation is confirmed to pass, the heat balance check calculation is executed, and if the heat balance check calculation is confirmed to pass, the heat calculation check is completed, so that the heat calculation check automatic control on the corresponding boiler type based on the flame center adjustment mode can be realized.
Further, the first computing unit 401 is specifically configured to:
if the reheat steam temperature is higher than the preset reheat steam temperature set value and reaches the preset value, the flame center is lowered, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches the preset value interval;
if the reheat steam temperature is determined to be lower than the preset reheat steam temperature set value and reaches a preset value, the flame center is increased, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches a preset value interval; one end value of the preset value interval is obtained by subtracting the preset value from the preset reheat steam temperature set value, and the other end value of the preset value interval is obtained by adding the preset value to the preset reheat steam temperature set value.
Further, the first computing unit 401 is further specifically configured to:
lowering the flame center by reducing burner tilt angle control;
the flame center is increased by increasing burner tilt angle control.
Further, the first computing unit 401 is further specifically configured to:
the lowering of the flame center by reducing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt minimum);
increasing the flame center by increasing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt maximum).
Further, the third computing unit 403 is specifically configured to:
and (3) comparing the total heat absorption capacity of each heating surface of the boiler with the heat release capacity of the fuel in the boiler, and if the comparison result value is determined to be within the preset error value, determining that the heat balance check calculation is passed.
Further, the thermal calculation check control device based on the flame center adjusting mode is further used for:
and if the comparison result value is determined to be outside the preset error value, determining that the heat balance checking calculation is not passed, resetting the precision of the heating surfaces of all stages, and executing the heat balance calculation.
The embodiment of the heat calculation checking control device based on the flame center adjusting mode provided by the embodiment of the invention can be particularly used for executing the processing flow of each method embodiment, and the functions of the heat calculation checking control device are not repeated herein, and can be described in detail with reference to the method embodiments.
Fig. 5 is a schematic diagram of an entity structure of a computer device according to an embodiment of the present invention, as shown in fig. 5, where the computer device includes: memory 501, processor 502 and a computer program stored on memory 501 and executable on processor 502, which processor 502 when executing the computer program implements the method of:
after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth;
if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature;
and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
The present embodiment discloses a computer program product comprising a computer program which, when executed by a processor, implements the method of:
after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth;
if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature;
and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
The present embodiment provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the method of:
after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth;
if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature;
and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
Compared with the technical scheme in the prior art, the thermal calculation checking control method based on the flame center adjusting mode provided by the embodiment of the invention performs the furnace flame center checking calculation after the thermal calculation of the low-temperature reheater and the additional heating surface thereof is completed; if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature; if the flue gas temperature check calculation is confirmed to pass, the heat balance check calculation is executed, and if the heat balance check calculation is confirmed to pass, the heat calculation check is completed, so that the heat calculation check automatic control on the corresponding boiler type based on the flame center adjustment mode can be realized.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present specification, reference to the terms "one embodiment," "one particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A thermal calculation check control method based on a flame center adjusting mode is characterized by comprising the following steps:
after the thermal calculation of the low-temperature reheater and the additional heating surface is completed, checking and calculating the flame center of the hearth;
if the verification calculation of the flame center of the hearth is determined to pass, sequentially executing the continuous verification calculation of reheat steam, the thermal calculation of an economizer and an additional heating surface thereof, the continuous verification calculation of a steam side, the continuous verification calculation of a water side, the thermal calculation of an air preheater and the verification calculation of a smoke discharge temperature;
and if the flue gas temperature check calculation is determined to pass, executing the heat balance check calculation, and if the heat balance check calculation is determined to pass, completing the heat calculation check.
2. The method for controlling the check of the thermal calculation based on the flame center adjustment mode according to claim 1, wherein the checking of the flame center of the furnace is performed by:
if the reheat steam temperature is higher than the preset reheat steam temperature set value and reaches the preset value, the flame center is lowered, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches the preset value interval;
if the reheat steam temperature is determined to be lower than the preset reheat steam temperature set value and reaches a preset value, the flame center is increased, and the thermal calculation of the hearth and the additional heating surface thereof and the subsequent steps are executed until the reheat steam temperature reaches a preset value interval; one end value of the preset value interval is obtained by subtracting the preset value from the preset reheat steam temperature set value, and the other end value of the preset value interval is obtained by adding the preset value to the preset reheat steam temperature set value.
3. The method for controlling the thermal calculation check based on the flame center adjustment mode according to claim 2, wherein lowering or raising the flame center comprises:
lowering the flame center by reducing burner tilt angle control;
the flame center is increased by increasing burner tilt angle control.
4. A method of thermal calculation check control based on flame kernel mode as in claim 3, wherein said lowering said flame kernel by reducing burner tilt control comprises:
the lowering of the flame center by reducing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt minimum);
the increasing the flame center by increasing burner tilt angle control includes:
increasing the flame center by increasing burner tilt angle control is accomplished according to the following formula:
burner tilt = 0.5× (current burner tilt + burner tilt maximum).
5. The flame kernel mode based thermodynamic calculation check control method as claimed in any one of claims 1 to 4, wherein determining the passing of the thermodynamic equilibrium check calculation comprises:
and (3) comparing the total heat absorption capacity of each heating surface of the boiler with the heat release capacity of the fuel in the boiler, and if the comparison result value is determined to be within the preset error value, determining that the heat balance check calculation is passed.
6. The flame-center-adjustment-based thermodynamic calculation check control method as claimed in claim 5, further comprising:
and if the comparison result value is determined to be outside the preset error value, determining that the heat balance checking calculation is not passed, resetting the precision of the heating surfaces of all stages, and executing the heat balance calculation.
7. The utility model provides a thermal calculation check controlling means based on flame center regulation mode which characterized in that includes:
the first calculation unit is used for carrying out furnace flame center checking calculation after the low-temperature reheater and the additional heating surface thereof are subjected to thermal calculation;
the second calculation unit is used for sequentially executing reheat steam continuity check calculation, economizer and additional heating surface thermal calculation, steam side continuity check calculation, water side continuity check calculation, air preheater thermal calculation and exhaust gas temperature check calculation if the fact that the hearth flame center check calculation passes is determined;
and the third calculation unit is used for executing heat balance check calculation if the exhaust gas temperature check calculation is determined to pass, and completing heat calculation check if the heat balance check calculation is determined to pass.
8. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 1 to 6 when executing the computer program.
9. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method of any of claims 1 to 6.
10. A computer program product, characterized in that the computer program product comprises a computer program which, when executed by a processor, implements the method of any of claims 1 to 6.
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| CN202311507337.7A CN117574630A (en) | 2023-11-13 | 2023-11-13 | Thermal calculation check control method and device based on flame center adjustment mode |
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| CN202311507337.7A CN117574630A (en) | 2023-11-13 | 2023-11-13 | Thermal calculation check control method and device based on flame center adjustment mode |
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