CN101776926A - Method for improving reheated steam temperature of thermal generator set - Google Patents
Method for improving reheated steam temperature of thermal generator set Download PDFInfo
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- 238000010248 power generation Methods 0.000 claims description 68
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- 239000000446 fuel Substances 0.000 claims description 6
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- 230000003749 cleanliness Effects 0.000 claims description 4
- 239000010883 coal ash Substances 0.000 claims description 4
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Abstract
The invention relates to a method for improving the reheated steam temperature of a thermal generator set, which includes the following steps: step 1, building up a remote management control system; step 2, setting the reheated steam temperature of the thermal generator set and the expected value of the operating parameters of the thermal generator set, which has effect to the reheated steam temperature parameter; setting the permitted error value of the reheated steam temperature index; step 3, comparing the effective value and the expected value of the reheated steam temperature, if the difference of the two values is bigger than the permitted error value of the reheated steam temperature index set in step 2, respectively adjusting the parameter of the thermal generator set until the effective value of the parameter reaches the expected value; and step 4, repeating step 3 until the difference between the effective value and the expected value of the reheated steam temperature is smaller than the permitted error value of the reheated steam temperature index set in step 2. The invention has the advantage that the invention provides a friendly platform for the workers to observe the other real-time operating state information which can have effect on the reheated steam temperature parameter.
Description
Technical field
The present invention relates to the thermal power generation field, particularly relate to a kind of method that improves reheated steam temperature of thermal generator set.
Background technology
In the thermal power generation process, the reheat steam temperature of thermal power generation unit is crossed the low generatine set heat efficiency that will cause and is reduced, theoretically, reheat steam temperature does not reduce by 1 degree centigrade, influence turbine efficiency and be about 0.013%, corresponding coal consumption is about 0.11g/K Wh, and reheat steam temperature is crossed the low steam turbine steam moisture increase of grade blade soon that also can make, this not only makes the steam turbine internal efficiency reduce, and cause the steam turbine erosion of grade blade soon to aggravate, when sharply descending, also may cause steam turbine and jet chimney water slug.
Yet in the prior art, the staff can only rely on the working experience of oneself to check the reason that may influence reheat steam temperature, and then rule of thumb the related causes that may influence reheat steam temperature is investigated singly, up to finding the real reason that influences reheat steam temperature, and, improve the reheat steam temperature of thermal power generation unit with this with this reason eliminating.
But, owing to be in the thermal power generation unit general more complicated of external environment condition on every side of power generation site, temperature and radiation are all higher, traditional on-the-spot manual maintenance way to manage no longer adapts to, and the reason that influences reheated steam temperature of thermal generator set has a lot, for example the unit operation parameter is not good, fuel self parameter is not good, the bad reheat steam temperature that all may have influence on of unit equipment operation can not reach ideal value, and the various factors that influence reheat steam temperature may exist sometimes simultaneously, how can accomplish to understand the reason of the reheat steam temperature that influences the thermal power generation unit that is in power generation site whenever and wherever possible, " suit the remedy to the case " at this reason then, thereby improve the various factors that influences reheat steam temperature, promoting the economic benefit of thermal power generation unit overall operation, is the technical barrier that solution is badly in need of in the thermal power generation field.
Summary of the invention
Technical matters to be solved by this invention is the method that provides a kind of at above-mentioned prior art and can effectively reduce human cost, saves maintenance cost and fault handling time and safety and improve reheated steam temperature of thermal generator set reliably.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: the method for this raising reheated steam temperature of thermal generator set is characterized in that: may further comprise the steps
Step 1, set up a long-range management control system, this management control system comprises
Data acquisition module can be used for gathering the reheat steam temperature of power generation site thermal power generation unit and the original value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter at least; Described other real time execution work informations that can exert an influence to the reheat steam temperature parameter comprise the operational factor of thermal power generation unit at least;
Data validity is checked module, link to each other with described data acquisition module, with data collecting module collected to the reheat steam temperature of power generation site thermal power generation unit and the original value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter carry out validity and check, the data of confidence level and degree of association difference are rejected in the original value of other real time execution work informations that can exert an influence with reheat steam temperature and to the reheat steam temperature parameter, thereby obtain reheat steam temperature and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
Data memory module is checked module with described data validity and is linked to each other, and is used to preserve the reheat steam temperature of power generation site thermal power generation unit and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
Display module links to each other with described data memory module, is used for showing in real time the reheat steam temperature of power generation site thermal power generation unit and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
The desirable operational factor of step 2, other real time execution work informations that can exert an influence according to the current load of the thermal power generation unit of power generation site, external environment condition parameter setting reheated steam temperature of thermal generator set and to the reheat steam temperature parameter, the expectation value of the operational factor of the thermal power generation unit that can exert an influence as the reheat steam temperature of thermal power generation unit and to the reheat steam temperature parameter; Set the qualified error amount of reheat steam temperature index;
Step 3, the effective value of the reheat steam temperature preserved in the data memory module and the expectation value of reheat steam temperature are compared, if both differences more than or equal to the qualified error amount of setting in the step 2 of reheat steam temperature index, then adopt following measure that the thermal power generation unit is adjusted:
To the effective value and the expectation value of the operational factor of the thermal power generation unit of reheat steam temperature parameter generating influence be compared respectively, if wherein the effective value of a certain parameter departs from expectation value, this parameter of then corresponding adjustment thermal power generation unit reaches expectation value until the effective value of this parameter;
Step 4, repeating step three, the qualified error amount of setting in less than step 2 until the difference of the expectation value of the effective value of reheat steam temperature and reheat steam temperature of reheat steam temperature index.
The original value that described data validity is checked other real time execution work informations that module can exert an influence to reheat steam temperature and to the reheat steam temperature parameter by the following method carries out validity and checks:
The original value of reheat steam temperature is found the solution thermal balance equation and mass balance equation according to square root with for minimum mode, and the value after finding the solution is the effective value of reheat steam temperature;
The original value of other real time execution work informations that will can exert an influence to the reheat steam temperature parameter is all found the solution thermal balance equation and mass balance equation according to square root with for minimum mode, and the value after finding the solution is the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter.
Described other real time execution work informations that can exert an influence to the reheat steam temperature parameter comprise three types, first type is the operational factor of described thermal power generation unit, comprises feed temperature, superheat steam temperature, superheated vapor pressure, air output, combustion chamber draft; Second type is the parameter of fuel self, comprises water cut, coal ash part, coal fugitive constituent, the fineness of pulverized coal of coal net calorific value, coal, the carbon content of coal; The third type is the device parameter of thermal power generation unit, comprises furnace heating surface cleanliness, high pressure cylinder efficient, intermediate pressure cylinder efficient.
In the described step 3,
When the effective value of feed temperature is greater than or less than the expectation value of feed temperature, adjust feed temperature by the mode that reduces or improve feed temperature, equal the expectation value of feed temperature until the effective value of feed temperature;
When the effective value of superheated vapor temperature is greater than or less than the expectation value of superheat steam temperature, adjust superheat steam temperature by the mode that reduces or improve superheat steam temperature, equal the expectation value of superheat steam temperature until the effective value of superheat steam temperature;
When the effective value of superheated vapor pressure is greater than or less than the expectation value of superheated vapor pressure, adjust superheated vapor pressure by the mode that reduces or improve superheated vapor pressure, equal the expectation value of superheated vapor pressure until the effective value of superheated vapor pressure;
When the effective value of air output is greater than or less than the expectation value of air output, adjust air output by the mode that reduces or improve air output, equal the expectation value of air output until the effective value of air output;
When the effective value of combustion chamber draft is greater than or less than the expectation value of combustion chamber draft, adjust combustion chamber draft by the mode that reduces or improve combustion chamber draft, equal the expectation value of combustion chamber draft until the effective value of combustion chamber draft.
Compared with prior art, the invention has the advantages that: can be effectively the factor of the reheated steam temperature of thermal generator set that influences power generation site be carried out remote monitoring and management, the platform of other real time execution work informations that the observation that a close friend is provided for the staff can exert an influence to the reheat steam temperature parameter, can reduce for search the not good human cost of reheat steam temperature, reduce or avoid field maintemance number of times, save maintenance cost and fault handling time and safety and reliable.
Description of drawings
Fig. 1 is the structured flowchart of management control system in the embodiment of the invention;
Fig. 2 is the process flow diagram that improves the reheated steam temperature of thermal generator set method in the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
The invention provides a kind of method that improves reheated steam temperature of thermal generator set, referring to shown in Figure 2, it may further comprise the steps:
Step 1, set up a long-range management control system, referring to shown in Figure 1, this management control system comprises
Data acquisition module 1 can be used for gathering the reheat steam temperature of power generation site thermal power generation unit and the original value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter at least; Data acquisition module 1 can be gathered the reheat steam temperature of a plurality of thermal power generation units and other real time execution work informations that can exert an influence to the reheat steam temperature parameter simultaneously;
Here other real time execution work informations that can exert an influence to the reheat steam temperature parameter comprise three types, first type is the operational factor of described thermal power generation unit, comprises feed temperature, superheat steam temperature, superheated vapor pressure, air output, combustion chamber draft; Second type is the parameter of fuel self, comprises water cut, coal ash part, coal fugitive constituent, the fineness of pulverized coal of coal net calorific value, coal, the carbon content of coal; The third type is the device parameter of thermal power generation unit, comprises furnace heating surface cleanliness, high pressure cylinder efficient, intermediate pressure cylinder efficient;
Data validity is checked module 2, link to each other with described data acquisition module, with data collecting module collected to the reheat steam temperature of power generation site thermal power generation unit and the original value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter carry out validity and check, the data of confidence level and degree of association difference are rejected in the original value of other real time execution work informations that can exert an influence with reheat steam temperature and to the reheat steam temperature parameter, thereby obtain reheat steam temperature and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
Data memory module 3 is checked module with described data validity and is linked to each other, and is used to preserve the reheat steam temperature of power generation site thermal power generation unit and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
Display module 4 links to each other with described data memory module, is used for showing in real time the reheat steam temperature of power generation site thermal power generation unit and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
Like this, operating personnel can find out the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter very intuitively, just can know then influencing the not good reason of reheat steam temperature parameter is what on earth, so can take appropriate measures " suiting the remedy to the case ";
The desirable operational factor of step 2, other real time execution work informations that can exert an influence according to the current load of the thermal power generation unit of power generation site, external environment condition parameter setting reheated steam temperature of thermal generator set and to the reheat steam temperature parameter, the expectation value of the operational factor of the thermal power generation unit that can exert an influence as the reheat steam temperature of thermal power generation unit and to the reheat steam temperature parameter; Set the qualified error amount of reheat steam temperature index;
Step 3, the effective value of the reheat steam temperature preserved in the data memory module and the expectation value of reheat steam temperature are compared, if both differences more than or equal to the qualified error amount of setting in the step 2 of reheat steam temperature index, then adopt following measure that the thermal power generation unit is adjusted:
To the effective value and the expectation value of the operational factor of the thermal power generation unit of reheat steam temperature parameter generating influence be compared respectively, if wherein the effective value of a certain parameter departs from expectation value, this parameter of then corresponding adjustment thermal power generation unit reaches expectation value until the effective value of this parameter;
That is: when the effective value of feed temperature is greater than or less than the expectation value of feed temperature, adjust feed temperature, equal the expectation value of feed temperature until the effective value of feed temperature by the mode that reduces or improve feed temperature;
When the effective value of superheated vapor temperature is greater than or less than the expectation value of superheat steam temperature, adjust superheat steam temperature by the mode that reduces or improve superheat steam temperature, equal the expectation value of superheat steam temperature until the effective value of superheat steam temperature;
When the effective value of superheated vapor pressure is greater than or less than the expectation value of superheated vapor pressure, adjust superheated vapor pressure by the mode that reduces or improve superheated vapor pressure, equal the expectation value of superheated vapor pressure until the effective value of superheated vapor pressure;
When the effective value of air output is greater than or less than the expectation value of air output, adjust air output by the mode that reduces or improve air output, equal the expectation value of air output until the effective value of air output;
When the effective value of combustion chamber draft is greater than or less than the expectation value of combustion chamber draft, adjust combustion chamber draft by the mode that reduces or improve combustion chamber draft, equal the expectation value of combustion chamber draft until the effective value of combustion chamber draft;
If find out by display module, it is the equipment reason of thermal power generation unit, then the staff just must in time remove the equipment of site inspection thermal power generation unit, for example check furnace heating surface cleanliness, high pressure cylinder efficient, intermediate pressure cylinder efficient of thermal power generation unit or the like, improve these parameters respectively by the method for routine then; If find out by display module, be that the not good reheat steam temperature that causes of fuel self is not good, the then corresponding fuel that improves for example improves water cut, coal ash part, coal fugitive constituent, the fineness of pulverized coal of coal net calorific value, coal, carbon content of coal or the like;
Behind step 4, the Fixed Time Interval, such as 5 minutes, repeating step three, the qualified error amount of setting in less than step 2 until the difference of the expectation value of the effective value of reheat steam temperature and reheat steam temperature of reheat steam temperature index.
The original value that data validity is checked other real time execution work informations that module can exert an influence to reheat steam temperature and to the reheat steam temperature parameter by the following method carries out validity and checks:
The original value of reheat steam temperature is found the solution thermal balance equation and mass balance equation according to square root with for minimum mode, and the value after finding the solution is the effective value of reheat steam temperature;
The original value of other real time execution work informations that will can exert an influence to the reheat steam temperature parameter is all found the solution thermal balance equation and mass balance equation according to square root with for minimum mode, and the value after finding the solution is the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter.
Here, according to square root and the process found the solution for minimum mode is the process of a mathematics, heat balance equation and mass balance are normal equations, the original value of reheat steam temperature and other real time execution work informations is all found the solution heat balance equation and mass balance equation according to square root with for minimum mode, can obtain one and separate, this is separated is exactly the reheat steam temperature that adopts among the present invention and the effective value of other real time execution work informations.
Claims (4)
1. a method that improves reheated steam temperature of thermal generator set is characterized in that: may further comprise the steps
Step 1, set up a long-range management control system, this management control system comprises
Data acquisition module can be used for gathering the reheat steam temperature of power generation site thermal power generation unit and the original value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter at least; Described other real time execution work informations that can exert an influence to the reheat steam temperature parameter comprise the operational factor of thermal power generation unit at least;
Data validity is checked module, link to each other with described data acquisition module, with data collecting module collected to the reheat steam temperature of power generation site thermal power generation unit and the original value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter carry out validity and check, the data of confidence level and degree of association difference are rejected in the original value of other real time execution work informations that can exert an influence with reheat steam temperature and to the reheat steam temperature parameter, thereby obtain reheat steam temperature and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
Data memory module is checked module with described data validity and is linked to each other, and is used to preserve the reheat steam temperature of power generation site thermal power generation unit and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
Display module links to each other with described data memory module, is used for showing in real time the reheat steam temperature of power generation site thermal power generation unit and the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter;
The desirable operational factor of step 2, other real time execution work informations that can exert an influence according to the current load of the thermal power generation unit of power generation site, external environment condition parameter setting reheated steam temperature of thermal generator set and to the reheat steam temperature parameter, the expectation value of the operational factor of the thermal power generation unit that can exert an influence as the reheat steam temperature of thermal power generation unit and to the reheat steam temperature parameter; Set the qualified error amount of reheat steam temperature index;
Step 3, the effective value of the reheat steam temperature preserved in the data memory module and the expectation value of reheat steam temperature are compared, if both differences more than or equal to the qualified error amount of setting in the step 2 of reheat steam temperature index, then adopt following measure that the thermal power generation unit is adjusted:
To the effective value and the expectation value of the operational factor of the thermal power generation unit of reheat steam temperature parameter generating influence be compared respectively, if wherein the effective value of a certain parameter departs from expectation value, this parameter of then corresponding adjustment thermal power generation unit reaches expectation value until the effective value of this parameter;
Step 4, repeating step three, the qualified error amount of setting in less than step 2 until the difference of the expectation value of the effective value of reheat steam temperature and reheat steam temperature of reheat steam temperature index.
2. the method for raising reheated steam temperature of thermal generator set according to claim 1 is characterized in that: the original value that described data validity is checked other real time execution work informations that module can exert an influence to reheat steam temperature and to the reheat steam temperature parameter by the following method carries out validity and checks:
The original value of reheat steam temperature is found the solution thermal balance equation and mass balance equation according to square root with for minimum mode, and the value after finding the solution is the effective value of reheat steam temperature;
The original value of other real time execution work informations that will can exert an influence to the reheat steam temperature parameter is all found the solution thermal balance equation and mass balance equation according to square root with for minimum mode, and the value after finding the solution is the effective value of other real time execution work informations that can exert an influence to the reheat steam temperature parameter.
3. the method for raising reheated steam temperature of thermal generator set according to claim 1 and 2, it is characterized in that: described other real time execution work informations that can exert an influence to the reheat steam temperature parameter comprise three types, first type is the operational factor of described thermal power generation unit, comprises feed temperature, superheat steam temperature, superheated vapor pressure, air output, combustion chamber draft; Second type is the parameter of fuel self, comprises water cut, coal ash part, coal fugitive constituent, the fineness of pulverized coal of coal net calorific value, coal, the carbon content of coal; The third type is the device parameter of thermal power generation unit, comprises furnace heating surface cleanliness, high pressure cylinder efficient, intermediate pressure cylinder efficient.
4. the method for raising reheated steam temperature of thermal generator set according to claim 3 is characterized in that: in the described step 3,
When the effective value of feed temperature is greater than or less than the expectation value of feed temperature, adjust feed temperature by the mode that reduces or improve feed temperature, equal the expectation value of feed temperature until the effective value of feed temperature;
When the effective value of superheated vapor temperature is greater than or less than the expectation value of superheat steam temperature, adjust superheat steam temperature by the mode that reduces or improve superheat steam temperature, equal the expectation value of superheat steam temperature until the effective value of superheat steam temperature;
When the effective value of superheated vapor pressure is greater than or less than the expectation value of superheated vapor pressure, adjust superheated vapor pressure by the mode that reduces or improve superheated vapor pressure, equal the expectation value of superheated vapor pressure until the effective value of superheated vapor pressure;
When the effective value of air output is greater than or less than the expectation value of air output, adjust air output by the mode that reduces or improve air output, equal the expectation value of air output until the effective value of air output;
When the effective value of combustion chamber draft is greater than or less than the expectation value of combustion chamber draft, adjust combustion chamber draft by the mode that reduces or improve combustion chamber draft, equal the expectation value of combustion chamber draft until the effective value of combustion chamber draft.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102288911A (en) * | 2011-06-03 | 2011-12-21 | 中国神华能源股份有限公司 | System and method for monitoring and diagnosing thermal generator set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102288911A (en) * | 2011-06-03 | 2011-12-21 | 中国神华能源股份有限公司 | System and method for monitoring and diagnosing thermal generator set |
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