CN117591772A - Continuity check calculation method and device - Google Patents
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Abstract
The invention provides a continuity check calculation method and device, and relates to the technical field of boiler control. The method comprises the following steps: performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed; after finishing the superheated steam continuity check, carrying out water side continuity check; and after the water-side continuity check is finished, air-side continuity check is carried out. The apparatus performs the above method. The continuity check calculation method and the continuity check calculation device provided by the embodiment of the invention can realize the continuity check calculation of the whole part of the boiler and ensure the continuity of temperature connection.
Description
Technical Field
The invention relates to the technical field of boiler control, in particular to a continuity check calculation method and device.
Background
For two heating surfaces of the same type of coolant, if the internal flow direction of the same type of coolant is opposite to the flow direction of the flue gas, the problem of discontinuous connection of the coolant side temperatures occurs. Taking front screen thermodynamic calculation as an example, the inlet steam is usually from the outlet of the heating surface covered by the economizer, but the front screen thermodynamic calculation is carried out before the calculation of the economizer thermodynamic calculation, so that the front screen thermodynamic calculation needs to firstly assume the inlet steam temperature, until the calculation of the economizer thermodynamic calculation is completed, whether the assumed front screen temperature is suitable or not can not be known, if not, the calculation is returned to be carried out again, and the checking process is called continuous checking, so as to ensure the continuous process of the coolant temperature when the flue gas flow is different from the coolant flow.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a continuity check calculation method and a continuity check calculation device, which can at least partially solve the problems in the prior art.
In one aspect, the present invention provides a method for calculating continuity check, including:
performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed;
after finishing the superheated steam continuity check, carrying out water side continuity check;
and after the water-side continuity check is finished, air-side continuity check is carried out.
Wherein, reheat steam continuity check includes:
calculating a first difference between the low temperature reheater outlet temperature and the high temperature reheater inlet steam temperature;
if the first difference value is larger than the preset first difference value threshold value, replacing the inlet steam temperature of the high-temperature reheater with the outlet temperature of the low-temperature reheater, and performing thermal calculation of the high-temperature reheater.
Wherein, superheated steam continuity check includes:
if the boiler is determined to be a first type boiler with the parameters below the ultrahigh pressure, calculating a second difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the front screen superheater;
and if the second difference value is determined to be larger than a preset second difference value threshold value, replacing the inlet steam temperature of the front-screen superheater with the outlet temperature of the cladding type superheater, and performing front-screen thermodynamic calculation.
Wherein, superheated steam continuity check includes:
if the boiler is determined to be a second type boiler with ultrahigh pressure and above parameters, calculating a third difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the low-temperature superheater, and calculating a fourth difference value between the inlet steam temperature of the low-temperature superheater and the inlet steam temperature of the front screen superheater;
if the third difference value is smaller than or equal to the preset third difference value threshold value and the fourth difference value is larger than the preset fourth difference value threshold value, replacing the front-screen superheater inlet steam temperature with the low-temperature superheater inlet steam temperature, and performing front-screen thermodynamic calculation.
The continuity check calculation method further comprises the following steps:
and if the third difference value is determined to be larger than the preset third difference value threshold value, replacing the low-temperature superheater inlet steam temperature with the clad superheater outlet temperature, and performing low-temperature superheater thermodynamic calculation.
Wherein, the water side continuity check includes:
calculating a fifth difference value between the water temperature of the outlet of the main economizer and the water temperature of the inlet of the final-stage economizer, and if the fifth difference value is less than or equal to a preset fifth difference value threshold value, calculating the vapor enthalpy value of the inlet of the furnace ceiling;
if the sixth difference value between the vapor enthalpy value of the inlet of the furnace ceiling and the vapor enthalpy value of the preset ceiling is larger than the preset sixth difference value threshold, determining whether to adjust the first heating surface according to the first preset calculation state identification zone bit;
and if the first heating surface is determined to be regulated, regulating the heat exchange area of the economizer according to the enthalpy increase of the economizer and the vapor enthalpy lack of the ceiling inlet, and carrying out the thermodynamic calculation of the main economizer.
The continuity check calculation method further comprises the following steps:
and if the first heating surface is not regulated, updating the steam temperature at the inlet of the furnace ceiling, and performing furnace thermodynamic calculation.
The continuity check calculation method further comprises the following steps:
and if the fifth difference value is determined to be larger than the preset fifth difference value threshold value, updating the inlet water temperature of the final-stage economizer to be the outlet water temperature of the main economizer, and performing thermal calculation on the final-stage economizer.
Wherein, the air side continuity check includes:
calculating a seventh difference value between the outlet hot air temperature of the air preheater and the hot air temperature of the hearth, and if the seventh difference value is determined to be larger than a preset seventh difference value threshold value, determining whether to adjust the second heating surface according to a preset second calculation state identification zone bit;
and if the second heating surface is determined to be adjusted, adjusting the heat exchange area of the air preheater according to the enthalpy increase of the air preheater and the enthalpy lack of the steam at the inlet of the ceiling, and performing thermal calculation of the air preheater.
The continuity check calculation method further comprises the following steps:
and if the second heating surface is not regulated, updating the temperature of hot air at the inlet of the hearth, and performing hearth thermal calculation.
In one aspect, the present invention provides a continuity check computing device, including:
the first checking unit is used for checking the continuity of the reheat steam, and checking the continuity of the reheat steam after the continuity of the reheat steam is checked;
the second checking unit is used for checking the continuity of the water side after the continuity check of the superheated steam is finished;
and the third checking unit is used for checking the air side continuity after the water side continuity checking is finished.
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:
performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed;
after finishing the superheated steam continuity check, carrying out water side continuity check;
and after the water-side continuity check is finished, air-side continuity check is carried out.
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:
performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed;
after finishing the superheated steam continuity check, carrying out water side continuity check;
and after the water-side continuity check is finished, air-side continuity check is carried out.
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:
performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed;
after finishing the superheated steam continuity check, carrying out water side continuity check;
and after the water-side continuity check is finished, air-side continuity check is carried out.
According to the continuity check calculation method and device provided by the embodiment of the invention, the reheat steam continuity check is carried out, and the superheated steam continuity check is carried out after the reheat steam continuity check is completed; after finishing the superheated steam continuity check, carrying out water side continuity check; after the water side continuity check is finished, air side continuity check is carried out, so that continuity check calculation of the whole part of the boiler can be realized, and continuity of temperature connection is ensured.
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 flowchart of a continuity check calculation method according to an embodiment of the present invention.
Fig. 2 is a flowchart of a continuity check calculation method according to another embodiment of the present invention.
Fig. 3 is a flowchart of a continuity check calculation method according to another embodiment of the present invention.
Fig. 4 is a flowchart of a continuity check calculation method according to another embodiment of the present invention.
Fig. 5 is a flowchart of a continuity check calculation method according to another embodiment of the present invention.
Fig. 6 is a flowchart of a continuity check calculation method according to another embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a continuity check computing device according to an embodiment of the present invention.
Fig. 8 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 flow chart of a continuity check calculation method according to an embodiment of the present invention, as shown in fig. 1, where the continuity check calculation method according to the embodiment of the present invention includes:
step S1: and (3) performing reheat steam continuity check, and performing superheated steam continuity check after the reheat steam continuity check is completed.
Step S2: and after the superheated steam continuity check is finished, performing water side continuity check.
Step S3: and after the water-side continuity check is finished, air-side continuity check is carried out.
In the step S1, the apparatus performs reheat steam continuity check, and performs the superheated steam continuity check after the reheat steam continuity check is completed. The apparatus may be a computer device or the like, for example a server, performing 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 reheat steam continuity check includes:
calculating a first difference between the low temperature reheater outlet temperature and the high temperature reheater inlet steam temperature;
if the first difference value is larger than the preset first difference value threshold value, replacing the inlet steam temperature of the high-temperature reheater with the outlet temperature of the low-temperature reheater, and performing thermal calculation of the high-temperature reheater. The preset first difference threshold may be set autonomously according to the actual situation, after the high-temperature reheater heat calculation is performed, the calculation of the first difference between the low-temperature reheater outlet temperature and the high-temperature reheater inlet steam temperature may be continuously performed, and the subsequent steps may be performed.
According to different configurations of the boiler, the problem of continuity of superheated steam mainly occurs at two positions of a front screen inlet and a low-temperature superheater inlet, and steam continuity check is to check the sizes of temperature gaps at the positions and complete elimination of the gaps through iterative calculation.
As shown in fig. 3, the superheated steam continuity check includes:
if the boiler is determined to be a first type boiler with the parameters below the ultrahigh pressure, calculating a second difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the front screen superheater;
and if the second difference value is determined to be larger than a preset second difference value threshold value, replacing the inlet steam temperature of the front-screen superheater with the outlet temperature of the cladding type superheater, and performing front-screen thermodynamic calculation. The preset second difference threshold may be set autonomously according to the actual situation, and after the front-panel thermal calculation, the calculation of the second difference between the outlet temperature of the coated superheater and the inlet steam temperature of the front-panel superheater may be continuously performed, and the subsequent steps may be performed.
The boiler with the parameters below the ultrahigh pressure is not provided with a low-temperature superheater generally, and the steam at the inlet of the front screen is sourced from the outlet of the superheater covered by the economizer; the steam continuity checking method is that after the thermal calculation of the coated superheater is completed, the difference value between the outlet temperature of the coated superheater and the inlet steam temperature of the front screen is compared, if the difference value exceeds the allowable error, the inlet steam temperature of the front screen is replaced by the outlet temperature of the coated superheater, and the calculated temperature is returned to the front screen heat meter calculation module for recalculation. If the difference meets the requirement, checking is completed, and a subsequent module for subsequent thermal calculation is performed.
As shown in fig. 4, the superheated steam continuity check includes:
if the boiler is determined to be a second type boiler with ultrahigh pressure and above parameters, calculating a third difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the low-temperature superheater, and calculating a fourth difference value between the inlet steam temperature of the low-temperature superheater and the inlet steam temperature of the front screen superheater;
if the third difference value is smaller than or equal to the preset third difference value threshold value and the fourth difference value is larger than the preset fourth difference value threshold value, replacing the front-screen superheater inlet steam temperature with the low-temperature superheater inlet steam temperature, and performing front-screen thermodynamic calculation. The preset third difference threshold value and the preset fourth difference threshold value may be set autonomously according to actual conditions, and after the front-panel heat calculation, the calculation of the third difference between the outlet temperature of the clad superheater and the inlet steam temperature of the low-temperature superheater, and the calculation of the fourth difference between the inlet steam temperature of the low-temperature superheater and the inlet steam temperature of the front-panel superheater may be continuously performed, and the subsequent steps may be performed.
As shown in fig. 4, the continuity check calculation method further includes:
and if the third difference value is determined to be larger than the preset third difference value threshold value, replacing the low-temperature superheater inlet steam temperature with the clad superheater outlet temperature, and performing low-temperature superheater thermodynamic calculation. After the low temperature superheater heat calculation, a third difference between the clad superheater outlet temperature and the low temperature superheater inlet steam temperature and a fourth difference between the low temperature superheater inlet steam temperature and the front panel superheater inlet steam temperature may be calculated, and the subsequent steps may be performed continuously.
The ultra-high pressure and above parameter boilers are usually provided with a low-temperature superheater, the inlet steam of the front-screen superheater is usually sourced from the outlet of the low-temperature superheater, and the inlet steam of the low-temperature superheater is sourced from the outlet of the economizer coated superheater. At the moment, the checking work is carried out at two positions, the continuity of the cladding superheater and the low-temperature superheater is checked firstly, and then the continuity of the low-temperature superheater and the front screen inlet steam is checked.
In the step S2, the apparatus performs water-side continuity check after completion of superheated steam continuity check. As shown in fig. 5, the water-side continuity check includes:
calculating a fifth difference value between the water temperature of the outlet of the main economizer and the water temperature of the inlet of the final-stage economizer, and if the fifth difference value is less than or equal to a preset fifth difference value threshold value, calculating the vapor enthalpy value of the inlet of the furnace ceiling; the preset fifth difference threshold may be set autonomously according to the actual situation. The vapor enthalpy value of the inlet of the furnace ceiling can be calculated according to the following formula:
wherein h is sh,en Is the enthalpy value of steam at the inlet of a furnace ceiling, and the unit is kJ/kg/h ec,lv The unit kJ/kg and D are the enthalpy value of outlet water of a final-stage economizer sh,en The unit kg/s and sigma Q are the inlet steam flow of the ceiling superheater fw The unit kJ and B are the boiler fuel quantity, the unit kg/s,For heat preservation coefficient, 0.99%>The total amount of heat absorbed by each heater and no portion dissipated into the air.
If the sixth difference value between the vapor enthalpy value of the inlet of the furnace ceiling and the vapor enthalpy value of the preset ceiling is larger than the preset sixth difference value threshold, determining whether to adjust the first heating surface according to the preset first calculation state identification zone bit; the preset sixth difference threshold may be set autonomously according to the actual situation, and the preset first calculation state identification flag bit may include 0 or 1, where 0 may represent the calculation purpose as a design process, and 1 may represent the calculation purpose as a verification calculation.
If the preset calculation state identification flag bit is 0, the first heating surface needs to be adjusted; if the preset calculation state identification flag bit is 1, the first heating surface does not need to be adjusted.
And if the first heating surface is determined to be regulated, regulating the heat exchange area of the economizer according to the enthalpy increase of the economizer and the vapor enthalpy lack of the ceiling inlet, and carrying out the thermodynamic calculation of the main economizer. The heat exchange area of the economizer can be adjusted according to the following formula:
new heat exchange area of the economizer = old heat exchange area of the economizer (1 + ceiling inlet steam enthalpy lack/economizer enthalpy increase);
the vapor enthalpy of the ceiling inlet is the difference between the vapor enthalpy of the actual ceiling inlet and the vapor temperature enthalpy of the preset ceiling inlet.
The continuity check calculation method further comprises the following steps:
and if the first heating surface is not regulated, updating the steam temperature at the inlet of the furnace ceiling, and performing furnace thermodynamic calculation.
The continuity check calculation method further comprises the following steps:
and if the fifth difference value is determined to be larger than the preset fifth difference value threshold value, updating the inlet water temperature of the final-stage economizer to be the outlet water temperature of the main economizer, and performing thermal calculation on the final-stage economizer.
The heating surface of the boiler in the form of water mainly comprises an economizer and a hearth, wherein the hearth is the steam-water working medium heating surface calculated first, and the economizer is the steam-water working medium heating surface calculated last, so that the two are necessarily in continuity. Meanwhile, if a two-stage economizer arrangement is adopted, the two-stage economizers are usually arranged in a countercurrent mode, so that the problem of continuity also exists. For the check between two-stage economizers and the check type of the continuity of the reheat steam, the connection between the outlet of the economizer and the hearth is complex, and the forward direction of the economizer is the furnace water in the hearth. Because the hearth is a radiation type heat exchange surface, the heat exchange process is mainly limited by the radiation capacity of the hot end of the flue gas, the heat exchange quantity and the temperature of furnace water can be assumed to be not greatly related, but the saturated steam temperature of the outlet of the hearth is closely related, so that the water side continuity check work of the final-stage economizer is actually related to the saturated steam of the outlet of the hearth. The furnace outlet saturated steam is the steam temperature at the ceiling superheater inlet.
According to the characteristics of arranging the two-stage economizer of the final-stage economizer and the main economizer, as shown in fig. 5, after the calculation of the main economizer is completed, the difference between the water temperature at the outlet of the main economizer and the water temperature at the inlet of the final-stage economizer needs to be checked first in the first step, and if the difference DTws between the two is larger than the allowable error, the final-stage economizer is returned to calculate the outlet temperature of the main economizer again first until the DTws meets the requirement.
And after the DTws meet the requirements, starting to check the continuity of the outlet water temperature of the economizer with the steam temperature at the inlet of the furnace ceiling after passing through the furnace. The process is complex, and the main process is as follows:
1. the boiler water absorbs a large amount of heat between the steam from the final-stage economizer to the top-stage shed inlet, the main evaporation position is the hearth water-cooled wall, but the heating surfaces such as the cladding pipe, the suspension pipe, the slag condensing pipe and the like which have a plurality of convection heating surface processes are water, and the heat absorbed by the cladding pipe, the suspension pipe, the slag condensing pipe and the like jointly completes the process of boiler water evaporation. Thus, starting from the water enthalpy of the outlet of the final-stage economizer, the product of the sum of the heat absorption capacity of all the water-side heating surfaces and the heat preservation coefficient is added, and the enthalpy value which the saturated steam of the outlet of the hearth should have is changed, namely:
2. calculated h sh,en Comparing the steam enthalpy of the outlet of the steam drum/steam-water separator preset by boiler thermodynamic calculation, and if the steam enthalpy is smaller than the allowable error, passing (the allowable error is 10 ℃); if the error is greater than the allowable error, modifying the area of the economizer or modifying the given value of the front screen inlet steam temperature (corresponding to updating the furnace ceiling inlet steam temperature); otherwise the boiler would go into dead cycle or the final heat balance check would not pass. The method is realized by firstly judging whether to modify the area of the economizer, and if the area of the economizer is not modified, modifying the steam temperature at the inlet of the ceiling.
In the step S3, the apparatus performs air-side continuity check after completion of the water-side continuity check. As shown in fig. 6, the air-side continuity check includes:
calculating a seventh difference value between the outlet hot air temperature of the air preheater and the hot air temperature of the hearth, and if the seventh difference value is determined to be larger than a preset seventh difference value threshold value, determining whether to adjust the second heating surface according to a preset second calculation state identification zone bit; the preset seventh difference threshold may be set autonomously according to the actual situation, and the preset second calculation state identification flag may include 0 or 1, where 0 may represent the calculation purpose as the design process, and 1 may represent the calculation purpose as the verification calculation.
If a second calculation state identification flag bit is preset to be 0, the second heating surface needs to be adjusted; if the preset calculation state identification flag bit is 1, the second heating surface does not need to be adjusted. Reference may be made to the above description about the first heating surface, and no further description is given.
And if the second heating surface is determined to be adjusted, adjusting the heat exchange area of the air preheater according to the enthalpy increase of the air preheater and the enthalpy lack of the steam at the inlet of the ceiling, and performing thermal calculation of the air preheater. The heat exchange area of the air preheater can be adjusted, and the related description of the heat exchange area of the economizer can be referred to, and the description is omitted.
The continuity check calculation method further comprises the following steps:
and if the second heating surface is not regulated, updating the temperature of hot air at the inlet of the hearth, and performing hearth thermal calculation. Updating the furnace inlet hot air temperature may include: the air preheater outlet hot air temperature was used instead of the furnace inlet hot air temperature.
When the air preheaters are arranged in multiple stages, the high-temperature air preheaters are calculated first, and then the low-temperature preheaters are calculated, so that air side continuity check work is performed at the moment, and the aim of solving the problem of presupposing the inlet air temperature of the high-temperature air preheaters is achieved. In addition, the hot air of the air preheater finally enters the hearth, and after the thermal calculation of the air preheater of the last stage of the boiler is completed, the final hot air temperature is compared with the presupposed hearth inlet hot air temperature and checked: if the hot air temperature is calculated to be higher, the hot air temperature at the inlet of the hearth is increased, otherwise, the hot air temperature at the inlet of the hearth is reduced until the temperature difference between the hot air temperature and the hot air temperature is not more than +/-40 ℃.
And the air side continuity check is the same as the water side continuity check process, and if the air side continuity check does not pass the check, the air side continuity check also selects whether to adjust the heating surface of the air preheater or modify the inlet hot air temperature of the boiler furnace.
According to the continuity check calculation method provided by the embodiment of the invention, firstly, the continuous check of the reheat steam is arranged, and the method can be used after the calculation of the low-temperature reheater is completed. Secondly, checking the arranged superheated steam, wherein the checking needs to be arranged after the completion of the last-stage economizer and the cladding type superheater thereof; and checking the continuity of the water side again, and performing after the superheated steam checking is completed. And finally, checking the air preheater is performed after the water side continuity check is completed.
According to the continuity check calculation method provided by the embodiment of the invention, the reheat steam continuity check is carried out, and after the reheat steam continuity check is completed, the superheated steam continuity check is carried out; after finishing the superheated steam continuity check, carrying out water side continuity check; after the water side continuity check is finished, air side continuity check is carried out, so that continuity check calculation of the whole part of the boiler can be realized, and continuity of temperature connection is ensured.
Further, the reheat steam continuity check includes:
calculating a first difference between the low temperature reheater outlet temperature and the high temperature reheater inlet steam temperature; the description of the embodiments may be referred to above, and will not be repeated.
If the first difference value is larger than the preset first difference value threshold value, replacing the inlet steam temperature of the high-temperature reheater with the outlet temperature of the low-temperature reheater, and performing thermal calculation of the high-temperature reheater. The description of the embodiments may be referred to above, and will not be repeated.
Further, the superheated steam continuity check includes:
if the boiler is determined to be a first type boiler with the parameters below the ultrahigh pressure, calculating a second difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the front screen superheater; the description of the embodiments may be referred to above, and will not be repeated.
And if the second difference value is determined to be larger than a preset second difference value threshold value, replacing the inlet steam temperature of the front-screen superheater with the outlet temperature of the cladding type superheater, and performing front-screen thermodynamic calculation. The description of the embodiments may be referred to above, and will not be repeated.
Further, the superheated steam continuity check includes:
if the boiler is determined to be a second type boiler with ultrahigh pressure and above parameters, calculating a third difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the low-temperature superheater, and calculating a fourth difference value between the inlet steam temperature of the low-temperature superheater and the inlet steam temperature of the front screen superheater; the description of the embodiments may be referred to above, and will not be repeated.
If the third difference value is smaller than or equal to the preset third difference value threshold value and the fourth difference value is larger than the preset fourth difference value threshold value, replacing the front-screen superheater inlet steam temperature with the low-temperature superheater inlet steam temperature, and performing front-screen thermodynamic calculation. The description of the embodiments may be referred to above, and will not be repeated.
Further, the continuity check calculation method further includes:
and if the third difference value is determined to be larger than the preset third difference value threshold value, replacing the low-temperature superheater inlet steam temperature with the clad superheater outlet temperature, and performing low-temperature superheater thermodynamic calculation. The description of the embodiments may be referred to above, and will not be repeated.
Further, the water-side continuity check includes:
calculating a fifth difference value between the water temperature of the outlet of the main economizer and the water temperature of the inlet of the final-stage economizer, and if the fifth difference value is less than or equal to a preset fifth difference value threshold value, calculating the vapor enthalpy value of the inlet of the furnace ceiling; the description of the embodiments may be referred to above, and will not be repeated.
If the sixth difference value between the vapor enthalpy value of the inlet of the furnace ceiling and the vapor enthalpy value of the preset ceiling is larger than the preset sixth difference value threshold, determining whether to adjust the first heating surface according to the first preset calculation state identification zone bit; the description of the embodiments may be referred to above, and will not be repeated.
And if the first heating surface is determined to be regulated, regulating the heat exchange area of the economizer according to the enthalpy increase of the economizer and the vapor enthalpy lack of the ceiling inlet, and carrying out the thermodynamic calculation of the main economizer. The description of the embodiments may be referred to above, and will not be repeated.
Further, the continuity check calculation method further includes:
and if the first heating surface is not regulated, updating the steam temperature at the inlet of the furnace ceiling, and performing furnace thermodynamic calculation. The description of the embodiments may be referred to above, and will not be repeated.
Further, the continuity check calculation method further includes:
and if the fifth difference value is determined to be larger than the preset fifth difference value threshold value, updating the inlet water temperature of the final-stage economizer to be the outlet water temperature of the main economizer, and performing thermal calculation on the final-stage economizer. The description of the embodiments may be referred to above, and will not be repeated.
Further, the air-side continuity check includes:
calculating a seventh difference value between the outlet hot air temperature of the air preheater and the hot air temperature of the hearth, and if the seventh difference value is determined to be larger than a preset seventh difference value threshold value, determining whether to adjust the second heating surface according to a preset second calculation state identification zone bit; the description of the embodiments may be referred to above, and will not be repeated.
And if the second heating surface is determined to be adjusted, adjusting the heat exchange area of the air preheater according to the enthalpy increase of the air preheater and the enthalpy lack of the steam at the inlet of the ceiling, and performing thermal calculation of the air preheater. The description of the embodiments may be referred to above, and will not be repeated.
Further, the continuity check calculation method further includes:
and if the second heating surface is not regulated, updating the temperature of hot air at the inlet of the hearth, and performing hearth thermal calculation. The description of the embodiments may be referred to above, and will not be repeated.
Fig. 7 is a schematic structural diagram of a continuity check computing device according to an embodiment of the present invention, and as shown in fig. 7, the continuity check computing device according to an embodiment of the present invention includes a first check unit 701, a second check unit 702, and a third check unit 703, where:
the first checking unit 701 is used for checking the continuity of the reheat steam, and checking the continuity of the superheated steam after the continuity of the reheat steam is checked; the second checking unit 702 is used for checking water-side continuity after checking superheated steam continuity; the third checking unit 703 is used for performing air-side continuity check after the completion of the water-side continuity check.
Specifically, a first checking unit 701 in the device is used for checking the continuity of the reheat steam, and checking the continuity of the reheat steam after the continuity of the reheat steam is checked; the second checking unit 702 is used for checking water-side continuity after checking superheated steam continuity; the third checking unit 703 is used for performing air-side continuity check after the completion of the water-side continuity check.
According to the continuity check calculation device provided by the embodiment of the invention, the reheat steam continuity check is carried out, and the superheated steam continuity check is carried out after the reheat steam continuity check is completed; after finishing the superheated steam continuity check, carrying out water side continuity check; after the water side continuity check is finished, air side continuity check is carried out, so that continuity check calculation of the whole part of the boiler can be realized, and continuity of temperature connection is ensured.
Further, the first checking unit 701 is specifically configured to:
calculating a first difference between the low temperature reheater outlet temperature and the high temperature reheater inlet steam temperature;
if the first difference value is larger than the preset first difference value threshold value, replacing the inlet steam temperature of the high-temperature reheater with the outlet temperature of the low-temperature reheater, and performing thermal calculation of the high-temperature reheater.
Further, the first checking unit 701 is specifically configured to:
if the boiler is determined to be a first type boiler with the parameters below the ultrahigh pressure, calculating a second difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the front screen superheater;
and if the second difference value is determined to be larger than a preset second difference value threshold value, replacing the inlet steam temperature of the front-screen superheater with the outlet temperature of the cladding type superheater, and performing front-screen thermodynamic calculation.
Further, the first checking unit 701 is specifically configured to:
if the boiler is determined to be a second type boiler with ultrahigh pressure and above parameters, calculating a third difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the low-temperature superheater, and calculating a fourth difference value between the inlet steam temperature of the low-temperature superheater and the inlet steam temperature of the front screen superheater;
if the third difference value is smaller than or equal to the preset third difference value threshold value and the fourth difference value is larger than the preset fourth difference value threshold value, replacing the front-screen superheater inlet steam temperature with the low-temperature superheater inlet steam temperature, and performing front-screen thermodynamic calculation.
Further, the continuity check calculating device is further configured to:
and if the third difference value is determined to be larger than the preset third difference value threshold value, replacing the low-temperature superheater inlet steam temperature with the clad superheater outlet temperature, and performing low-temperature superheater thermodynamic calculation.
Further, the second checking unit 702 is specifically configured to:
calculating a fifth difference value between the water temperature of the outlet of the main economizer and the water temperature of the inlet of the final-stage economizer, and if the fifth difference value is less than or equal to a preset fifth difference value threshold value, calculating the vapor enthalpy value of the inlet of the furnace ceiling;
if the sixth difference value between the vapor enthalpy value of the inlet of the furnace ceiling and the vapor enthalpy value of the preset ceiling is larger than the preset sixth difference value threshold, determining whether to adjust the first heating surface according to the first preset calculation state identification zone bit;
and if the first heating surface is determined to be regulated, regulating the heat exchange area of the economizer according to the enthalpy increase of the economizer and the vapor enthalpy lack of the ceiling inlet, and carrying out the thermodynamic calculation of the main economizer.
Further, the continuity check calculating device is further configured to:
and if the first heating surface is not regulated, updating the steam temperature at the inlet of the furnace ceiling, and performing furnace thermodynamic calculation.
Further, the continuity check calculating device is further configured to:
and if the fifth difference value is determined to be larger than the preset fifth difference value threshold value, updating the inlet water temperature of the final-stage economizer to be the outlet water temperature of the main economizer, and performing thermal calculation on the final-stage economizer.
Further, the third checking unit 703 is specifically configured to:
calculating a seventh difference value between the outlet hot air temperature of the air preheater and the hot air temperature of the hearth, and if the seventh difference value is determined to be larger than a preset seventh difference value threshold value, determining whether to adjust the second heating surface according to a preset second calculation state identification zone bit;
and if the second heating surface is determined to be adjusted, adjusting the heat exchange area of the air preheater according to the enthalpy increase of the air preheater and the enthalpy lack of the steam at the inlet of the ceiling, and performing thermal calculation of the air preheater.
Further, the continuity check calculating device is further configured to:
and if the second heating surface is not regulated, updating the temperature of hot air at the inlet of the hearth, and performing hearth thermal calculation.
The embodiment of the continuity check computing device provided in the embodiment of the present invention may be specifically used to execute the processing flow of each method embodiment, and the functions thereof are not described herein again, and reference may be made to the detailed description of the method embodiments.
Fig. 8 is a schematic diagram of a physical structure of a computer device according to an embodiment of the present invention, where, as shown in fig. 8, the computer device includes: a memory 801, a processor 802, and a computer program stored on the memory 801 and executable on the processor 802, the processor 802 implementing the following method when executing the computer program:
performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed;
after finishing the superheated steam continuity check, carrying out water side continuity check;
and after the water-side continuity check is finished, air-side continuity check is carried out.
The present embodiment discloses a computer program product comprising a computer program which, when executed by a processor, implements the method of:
performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed;
after finishing the superheated steam continuity check, carrying out water side continuity check;
and after the water-side continuity check is finished, air-side continuity check is carried out.
The present embodiment provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the method of:
performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed;
after finishing the superheated steam continuity check, carrying out water side continuity check;
and after the water-side continuity check is finished, air-side continuity check is carried out.
Compared with the technical scheme in the prior art, the embodiment of the invention carries out the continuous check of the reheat steam, and carries out the continuous check of the reheat steam after the continuous check of the reheat steam is completed; after finishing the superheated steam continuity check, carrying out water side continuity check; after the water side continuity check is finished, air side continuity check is carried out, so that continuity check calculation of the whole part of the boiler can be realized, and continuity of temperature connection is ensured.
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 (14)
1. A continuity check calculation method, characterized by comprising:
performing reheat steam continuity check, and performing the reheat steam continuity check after the reheat steam continuity check is completed;
after finishing the superheated steam continuity check, carrying out water side continuity check;
and after the water-side continuity check is finished, air-side continuity check is carried out.
2. The continuity check calculation method according to claim 1, characterized in that the reheat steam continuity check includes:
calculating a first difference between the low temperature reheater outlet temperature and the high temperature reheater inlet steam temperature;
if the first difference value is larger than the preset first difference value threshold value, replacing the inlet steam temperature of the high-temperature reheater with the outlet temperature of the low-temperature reheater, and performing thermal calculation of the high-temperature reheater.
3. The continuity check calculation method according to claim 1, characterized in that the superheated steam continuity check includes:
if the boiler is determined to be a first type boiler with the parameters below the ultrahigh pressure, calculating a second difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the front screen superheater;
and if the second difference value is determined to be larger than a preset second difference value threshold value, replacing the inlet steam temperature of the front-screen superheater with the outlet temperature of the cladding type superheater, and performing front-screen thermodynamic calculation.
4. The continuity check calculation method according to claim 1, characterized in that the superheated steam continuity check includes:
if the boiler is determined to be a second type boiler with ultrahigh pressure and above parameters, calculating a third difference value between the outlet temperature of the cladding type superheater and the inlet steam temperature of the low-temperature superheater, and calculating a fourth difference value between the inlet steam temperature of the low-temperature superheater and the inlet steam temperature of the front screen superheater;
if the third difference value is smaller than or equal to the preset third difference value threshold value and the fourth difference value is larger than the preset fourth difference value threshold value, replacing the front-screen superheater inlet steam temperature with the low-temperature superheater inlet steam temperature, and performing front-screen thermodynamic calculation.
5. The continuity check calculation method according to claim 4, characterized in that the continuity check calculation method further comprises:
and if the third difference value is determined to be larger than the preset third difference value threshold value, replacing the low-temperature superheater inlet steam temperature with the clad superheater outlet temperature, and performing low-temperature superheater thermodynamic calculation.
6. The continuity check calculation method according to claim 1, characterized in that the water-side continuity check includes:
calculating a fifth difference value between the water temperature of the outlet of the main economizer and the water temperature of the inlet of the final-stage economizer, and if the fifth difference value is less than or equal to a preset fifth difference value threshold value, calculating the vapor enthalpy value of the inlet of the furnace ceiling;
if the sixth difference value between the vapor enthalpy value of the inlet of the furnace ceiling and the vapor enthalpy value of the preset ceiling is larger than the preset sixth difference value threshold, determining whether to adjust the first heating surface according to the first preset calculation state identification zone bit;
and if the first heating surface is determined to be regulated, regulating the heat exchange area of the economizer according to the enthalpy increase of the economizer and the vapor enthalpy lack of the ceiling inlet, and carrying out the thermodynamic calculation of the main economizer.
7. The continuity check calculation method according to claim 6, characterized in that the continuity check calculation method further comprises:
and if the first heating surface is not regulated, updating the steam temperature at the inlet of the furnace ceiling, and performing furnace thermodynamic calculation.
8. The continuity check calculation method according to claim 6, characterized in that the continuity check calculation method further comprises:
and if the fifth difference value is determined to be larger than the preset fifth difference value threshold value, updating the inlet water temperature of the final-stage economizer to be the outlet water temperature of the main economizer, and performing thermal calculation on the final-stage economizer.
9. The continuity check calculation method according to claim 1, characterized in that the air-side continuity check includes:
calculating a seventh difference value between the outlet hot air temperature of the air preheater and the hot air temperature of the hearth, and if the seventh difference value is determined to be larger than a preset seventh difference value threshold value, determining whether to adjust the second heating surface according to a preset second calculation state identification zone bit;
and if the second heating surface is determined to be adjusted, adjusting the heat exchange area of the air preheater according to the enthalpy increase of the air preheater and the enthalpy lack of the steam at the inlet of the ceiling, and performing thermal calculation of the air preheater.
10. The continuity check calculation method according to claim 9, characterized in that the continuity check calculation method further comprises:
and if the second heating surface is not regulated, updating the temperature of hot air at the inlet of the hearth, and performing hearth thermal calculation.
11. A continuity check computing device, comprising:
the first checking unit is used for checking the continuity of the reheat steam, and checking the continuity of the reheat steam after the continuity of the reheat steam is checked;
the second checking unit is used for checking the continuity of the water side after the continuity check of the superheated steam is finished;
and the third checking unit is used for checking the air side continuity after the water side continuity checking is finished.
12. 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 10 when executing the computer program.
13. 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 10.
14. 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 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311507751.8A CN117591772A (en) | 2023-11-13 | 2023-11-13 | Continuity check calculation method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311507751.8A CN117591772A (en) | 2023-11-13 | 2023-11-13 | Continuity check calculation method and device |
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| CN117591772A true CN117591772A (en) | 2024-02-23 |
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| CN202311507751.8A Pending CN117591772A (en) | 2023-11-13 | 2023-11-13 | Continuity check calculation method and device |
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| CN (1) | CN117591772A (en) |
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- 2023-11-13 CN CN202311507751.8A patent/CN117591772A/en active Pending
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