CN105138855A - Method and device for calculating influences of coal quality deviation on coal-fired generator set coal consumption - Google Patents
Method and device for calculating influences of coal quality deviation on coal-fired generator set coal consumption Download PDFInfo
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Abstract
The invention provides a method and device for calculating influences of a coal quality deviation on coal-fired generator set coal consumption. The method includes the steps that actual coal-firing amount of a boiler is measured, and whether the deviation of designed coal type coal-firing amount and the actual coal-firing amount of the boiler is larger than a preset deviation value is judged; if the deviation of the designed coal type coal-firing amount and the actual coal-firing amount of the boiler is larger than the preset deviation value, the variation of boiler solid incomplete combustion loss is calculated; according to power generation amount and the deviation of the actual coal-firing amount of the boiler and the designed coal type coal-firing amount, the power consumption rate increase amount caused by increase of amount of coal entering the boiler is calculated; whether boiler coal moisture exceeds a preset moisture value is judged; if the boiler coal moisture exceeds the preset moisture value, the exhausted smoke heat loss variation is calculated according to exhausted smoke temperature deviation; according to the variation of boiler solid incomplete combustion loss, the exhausted smoke heat loss variation and the power consumption rate increase amount, coal consumption variation caused by coal quality changes is calculated. The method and device can be used for quantitatively calculating the influences of the coal quality deviation on the coal-fired generator set coal consumption, and external condition deviations are accurately calculated.
Description
Technical field
The present invention relates to Thermal generation unit coal consumption analytical technology, particularly relate to computing method and device that a kind of ature of coal deviation affects Thermal generation unit coal consumption.
Background technology
Along with the demand of society to electric power is more and more higher, the generating efficiency how improving genset becomes the problem of current people concern.
For a genset determined, the efficiency level that it finally can reach depends on the factor of three aspects, that is: the Design and manufacture level of this genset; The application conditions of this generator unit; Supvr is to the management application level of genset.The management application level of supvr to genset is the subjective factor of unit operation, can be improved by the improvement of operational management.The Design and manufacture level of genset, and the application conditions of generator unit is the objective factor of unit operation.
Based on the factor of above-mentioned three aspects, in prior art, define following relevant to economy value:
(a) desired value or optimal value: based on identical steam design parameter design peak performance value can be ideal value or optimal value, optimal value represent same type units design the best, and management level high its performance to best;
(b) design load: the efficiency level of certain unit design to be evaluated;
(c) actual value: certain the actual efficiency level reached of unit to be evaluated;
D () should reach value: refer to that unit is in actual motion, under a certain objective condition (as temperature, circulating water temperature etc. can not under people's objective condition for a change) and a certain operating mode (as rate of load condensate), a certain heat supply generating is than running the optimum value that should reach in theory under condition under Optimum operating control mode.
Value should be reached with Energy design value for benchmark, be determined by the impact of remover apparatus aberrations in property and objective condition deviation.Equipment performance deviation refer to unit performance under design conditions with the difference of design load, comprehensively embody the design of equipment, manufacture and installation level, if not facilities and equipments transformation, just can not change equipment performance deviation.Objective condition deviation refers to objective condition residing for unit operation and the inconsistent deviation caused of design conditions, the service condition that so-called objective condition and the geographic position residing for unit, meteorological condition, network load restriction etc. are not affected by human factors.The efficiency deviate that design load deduction equipment performance deviation and objective condition deviation cause is this unit and should reaches value, that is:
Value=design load ± equipment performance deviation ± external condition deviation should be reached
The main factor considering three aspects of outside objective condition impact: the unit efficiency deviation that actual conventional ature of coal off-design ature of coal causes, the unit efficiency deviation that actual environment temperature departure design environment temperature causes, and actual the exerting oneself of unit departs from the efficiency deviation that nominal output causes, external condition deviation namely this three parts efficiency deviation add and.
Visible, the unit efficiency deviation that actual conventional ature of coal off-design ature of coal causes is as one of the principal element of external condition deviation, larger on the impact of generating efficiency, in order to study the efficiency level that genset finally can reach, the unit efficiency deviation that actual conventional ature of coal off-design ature of coal causes just must be considered.In the prior art, also there is not analytical technology Thermal generation unit affected about ature of coal deviation.
Summary of the invention
The invention provides computing method and device that a kind of ature of coal deviation affects Thermal generation unit coal consumption, quantitatively to calculate the impact of ature of coal deviation on Thermal generation unit coal consumption, accurately calculate external condition deviation.
To achieve these goals, the invention provides the computing method that a kind of ature of coal deviation affects Thermal generation unit coal consumption, described computing method comprise:
Measure the actual Coal-fired capacity of boiler, judge whether the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value;
If the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value, according to formula
calculate the variation delta q of boiler solid incomplete combustion loss
4;
According to the station service power consumption rate recruitment Δ λ that the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity causes
Δ B;
Judge whether as-fired coal moisture exceedes pre-set moisture value;
If as-fired coal moisture exceedes pre-set moisture value, according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2;
The coal consumption variation delta b that coal varitation causes is calculated according to the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment;
Wherein, C
fhfor the unburned combustible in fly ash of actual as-fired coal, %; A
arfor the ash content of actual as-fired coal, %; Q
ar, netfor actual as-fired coal net calorific value as received basis, kJ/kg; q
4for boiler solid incomplete combustion loss design load, %.
In one embodiment, if the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is not more than predetermined deviation value, the variation delta q of described boiler solid incomplete combustion loss is made
4and station service power consumption rate recruitment Δ λ
Δ Bbe zero.
In one embodiment, if as-fired coal moisture is no more than pre-set moisture value, make described heat loss due to exhaust gas variation delta q
2be zero.
In one embodiment, according to the station service power consumption rate recruitment Δ λ that the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity causes
Δ B, comprising:
Bring the difference of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity into formula
calculate the station service power consumption rate recruitment Δ λ that furnace coal weight increase causes
Δ B.
In one embodiment, according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2, comprising: by exhaust gas temperature deviation delta θ
lvbring Δ q into
2=0.0035 Δ θ
lv, calculate heat loss due to exhaust gas variation delta q
2, wherein Δ θ
lv=0.7 Δ M
ar, Δ M
arfor actual as-fired coal kind moisture is relative to the increment of design coal moisture.
In one embodiment, calculate according to the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment the coal consumption variation delta b that coal varitation causes, comprising: bring the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment into formula
in, calculate the coal consumption variation delta b that coal varitation causes.
To achieve these goals, the calculation element that the embodiment of the present invention provides a kind of ature of coal deviation to affect Thermal generation unit coal consumption, described calculation element comprises:
Coal-fired capacity deviate judging unit, for measuring the actual Coal-fired capacity of boiler, judges whether the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value;
Solid variable quantity computing unit, if the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value, for according to formula
calculate the variation delta q of boiler solid incomplete combustion loss
4;
Station service power consumption rate recruitment computing unit, for the station service power consumption rate recruitment Δ λ caused according to the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity
Δ B;
Moisture judging unit, for judging whether as-fired coal moisture exceedes pre-set moisture value;
Heat loss due to exhaust gas variable quantity computing unit, if as-fired coal moisture exceedes pre-set moisture value, for according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2;
Coal consumption variable quantity computing unit, calculates for the variable quantity according to the incomplete combustion loss of described boiler solid, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment the coal consumption variation delta b that coal varitation causes;
Wherein, C
fhfor the unburned combustible in fly ash of actual as-fired coal, %; A
arfor the ash content of actual as-fired coal, %; Q
ar, netfor actual as-fired coal net calorific value as received basis, kJ/kg; q
4for boiler solid incomplete combustion loss design load, %.
In one embodiment, if the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is not more than predetermined deviation value, described solid variable quantity computing unit and station service power consumption rate recruitment computing unit are used for the variation delta q making the incomplete combustion loss of described boiler solid respectively
4and station service power consumption rate recruitment Δ λ
Δ Bbe zero.
In one embodiment, if as-fired coal moisture is no more than pre-set moisture value, make described heat loss due to exhaust gas variation delta q
2be zero.
In one embodiment, described station service power consumption rate recruitment computing unit specifically for: bring the difference of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity into formula
calculate the station service power consumption rate recruitment Δ λ that furnace coal weight increase causes
Δ B.
In one embodiment, described heat loss due to exhaust gas variable quantity computing unit specifically for: by exhaust gas temperature deviation delta θ
lvbring Δ q into
2=0.0035 Δ θ
lv, calculate heat loss due to exhaust gas variation delta q
2, wherein Δ θ
lv=0.7 Δ M
ar, Δ M
arfor actual as-fired coal kind moisture is relative to the increment of design coal moisture.
In one embodiment, described coal consumption variable quantity computing unit specifically for: bring the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment into formula
in, calculate the coal consumption variation delta b that coal varitation causes.
The beneficial effect of the embodiment of the present invention is, utilizes the present invention, quantitatively can calculate the impact of ature of coal deviation on Thermal generation unit coal consumption, accurately calculates external condition deviation, and then the efficiency level that research genset finally can reach.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the computing method schematic diagram that the ature of coal deviation of the embodiment of the present invention affects Thermal generation unit coal consumption;
Fig. 2 is the computing method schematic flow sheet that the ature of coal deviation of another embodiment of the present invention affects Thermal generation unit coal consumption;
Fig. 3 is the computing device structure block diagram that the ature of coal deviation of the embodiment of the present invention affects Thermal generation unit coal consumption.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the computing method that the embodiment of the present invention provides a kind of ature of coal deviation to affect Thermal generation unit coal consumption, described computing method comprise:
S101: measure the actual Coal-fired capacity of boiler, judge whether the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value;
S102: if the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value, according to the variation delta q of following formulae discovery boiler solid incomplete combustion loss
4:
S103: the station service power consumption rate recruitment Δ λ caused according to the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity
Δ B;
S104: judge whether as-fired coal moisture exceedes pre-set moisture value;
S105: if as-fired coal moisture exceedes pre-set moisture value, according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2;
S106: calculate the coal consumption variation delta b that coal varitation causes according to the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment.
In formula 1, C
fhfor the unburned combustible in fly ash of actual as-fired coal, %; A
arfor the ash content of actual as-fired coal, %; Q
ar, netfor actual as-fired coal net calorific value as received basis, kJ/kg; q
4for boiler solid incomplete combustion loss design load, %.
Flow process is as shown in Figure 1 known, the present invention calculates the variable quantity of boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity and station service power consumption rate recruitment respectively, then the coal consumption variable quantity that the variable quantity of boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity and station service power consumption rate recruitment calculating coal varitation causes is utilized, quantitatively calculating the impact of ature of coal deviation on Thermal generation unit coal consumption, providing data for accurately calculating external condition deviation.
Fig. 2 is the computing method process flow diagram that the ature of coal deviation of another embodiment of the present invention affects Thermal generation unit coal consumption, describes the present invention in detail below in conjunction with Fig. 1 and Fig. 2.
The impact calculating ature of coal should based on deviation when the actual Coal-fired capacity of boiler and the minimum check coal of calorific value between design coal Coal-fired capacity.Actual as-fired coal matter off-design ature of coal, the economy of major effect boiler, shows boiler solid incomplete combustion loss design load (q
4) impact and impact on heat loss due to exhaust gas.
If judge that the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of boiler is greater than predetermined deviation value by S101, need the variation delta q by the incomplete combustion loss of above-mentioned formulae discovery boiler solid
4.Also need the station service power consumption rate recruitment Δ λ by causing according to the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity
Δ B.Particularly, by following formulae discovery station service power consumption rate recruitment Δ λ
Δ B:
In formula 2, Δ B is the difference of the actual Coal-fired capacity of boiler and design coal Coal-fired capacity, t/h; W
ffor generated energy, kW.
Bring the difference of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity into formula 2, just can calculate the station service power consumption rate recruitment Δ λ that furnace coal weight increase causes
Δ B.
In one preferred embodiment, predetermined deviation value can be 10%, and the present invention is not as limit.
If S104 judges as-fired coal, moisture exceedes pre-set moisture value, needs according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2, particularly, need to bring exhaust gas temperature deviation into following formula, calculate heat loss due to exhaust gas variation delta q
2:
Δq
2＝0.0035Δθ
Lv(3)
In formula 3, Δ θ
lvfor exhaust gas temperature deviation.
Δ θ
lvfor the exhaust gas temperature variable quantity of estimation, such as, often increase by 1 percentage point according to moisture, Δ θ
lvincrease by 0.7 DEG C of calculating, that is, Δ θ
lv=0.7 Δ M
ar, Δ M
arfor actual as-fired coal kind moisture is relative to the increment of design coal moisture, unit %.
In one preferred embodiment, pre-set moisture value can be 20%, and the present invention is not as limit.
According to the station service power consumption rate recruitment calculated in the heat loss due to exhaust gas variable quantity calculated in the variable quantity of boiler solid incomplete combustion loss calculated in formula 1, formula 3 and formula 2, the coal consumption variation delta b that coal varitation causes can be calculated, particularly, need to bring in following formula the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment into calculate coal varitation and cause coal consumption variation delta b.
In formula 4, b
stfor unit design coal consumption, g/kWh; η
bfor boiler efficiency design load, %; λ is subsidiary engine power consumption design load, %.
In formula 4, Δ q
4+ Δ q
2can represent with following formula:
Δη
B＝Δq
4+Δq
2(5)
Δ η
bfor coal varitation causes boiler efficiency variable quantity.
In one embodiment, as shown in Figure 2, when being judged that by S101 the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of boiler is less than or equal to predetermined deviation value, without the need to S102 and S103 through Fig. 1, namely without the need to being calculated the variation delta q of boiler solid incomplete combustion loss by formula 2 and formula 3
4and station service power consumption rate recruitment Δ λ
Δ B, directly make the variation delta q of boiler solid incomplete combustion loss
4and station service power consumption rate recruitment Δ λ
Δ Bbe zero, then carry out S104.
In one embodiment, as shown in Figure 2, when S104 judges that as-fired coal moisture is no more than pre-set moisture value, without the need to through S105, namely without the need to calculating heat loss due to exhaust gas variation delta q by formula 3
2, only need to make heat loss due to exhaust gas variation delta q
2be zero.
Known by foregoing description, when calculating the coal consumption variation delta b that coal varitation causes in formula 4, can be the variation delta q of only boiler solid incomplete combustion loss
4and station service power consumption rate recruitment Δ λ
Δ Bbe zero, heat loss due to exhaust gas variation delta q
2calculated by formula 3; Also can be only heat loss due to exhaust gas variation delta q
2be zero, the variation delta q of boiler solid incomplete combustion loss
4and station service power consumption rate recruitment Δ λ
Δ Bcalculate respectively by formula 1 and formula 2; Can also be the variation delta q of boiler solid incomplete combustion loss
4, station service power consumption rate recruitment Δ λ
Δ Band heat loss due to exhaust gas variation delta q
2be zero, or the variation delta q of boiler solid incomplete combustion loss
4, station service power consumption rate recruitment Δ λ
Δ Band heat loss due to exhaust gas variation delta q
2be non-vanishing, calculated respectively by formula 1, formula 2 and formula 3.
Utilize the present invention, quantitatively can calculate the impact of ature of coal deviation on Thermal generation unit coal consumption, accurately calculate external condition deviation, and then the efficiency level that research genset finally can reach.
Based on the inventive concept that the computing method affected Thermal generation unit coal consumption with the ature of coal deviation shown in Fig. 1 are identical, the embodiment of the present application additionally provides the calculation element that a kind of ature of coal deviation affects Thermal generation unit coal consumption, as below as described in embodiment.The principle of dealing with problems on the calculation element that Thermal generation unit coal consumption affects due to this ature of coal deviation is similar to the computing method that ature of coal deviation affects Thermal generation unit coal consumption, therefore this ature of coal deviation see the enforcement of ature of coal deviation on the computing method that Thermal generation unit coal consumption affects, can repeat part and repeats no more the enforcement of the calculation element that Thermal generation unit coal consumption affects.
Fig. 3 is the computing device structure block diagram that the ature of coal deviation of the embodiment of the present invention affects Thermal generation unit coal consumption, as shown in Figure 3, this calculation element comprises: Coal-fired capacity deviate judging unit 301, solid variable quantity computing unit 302, station service power consumption rate recruitment computing unit 303, moisture judging unit 304, heat loss due to exhaust gas variable quantity computing unit 305 and coal consumption variable quantity computing unit 306.
Coal-fired capacity deviate judging unit 301, for measuring the actual Coal-fired capacity of boiler, judges whether the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value;
If the deviation of solid variable quantity computing unit 302 design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value, for according to formula
calculate the variation delta q of boiler solid incomplete combustion loss
4;
The station service power consumption rate recruitment Δ λ of station service power consumption rate recruitment computing unit 303 for causing according to the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity
Δ B;
Moisture judging unit 304 is for judging whether as-fired coal moisture exceedes pre-set moisture value;
Heat loss due to exhaust gas variable quantity computing unit 305, if as-fired coal moisture exceedes pre-set moisture value, for according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2;
Coal consumption variable quantity computing unit 306 calculates for the variable quantity according to the incomplete combustion loss of described boiler solid, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment the coal consumption variation delta b that coal varitation causes.
In one embodiment, if the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is not more than predetermined deviation value, described solid variable quantity computing unit and station service power consumption rate recruitment computing unit are used for the variation delta q making the incomplete combustion loss of described boiler solid respectively
4and station service power consumption rate recruitment Δ λ
Δ Bbe zero.
In one embodiment, if as-fired coal moisture is no more than pre-set moisture value, described heat loss due to exhaust gas variable quantity computing unit makes described heat loss due to exhaust gas variation delta q
2be zero.
In one embodiment, described station service power consumption rate recruitment computing unit specifically for: bring the difference of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity into formula
calculate the station service power consumption rate recruitment Δ λ that furnace coal weight increase causes
Δ B.
In one embodiment, described heat loss due to exhaust gas variable quantity computing unit specifically for: by exhaust gas temperature deviation delta θ
lvbring Δ q into
2=0.0035 Δ θ
lv, calculate heat loss due to exhaust gas variation delta q
2.
Δ θ
lvfor the exhaust gas temperature variable quantity of estimation, such as, often increase by 1 percentage point according to moisture, Δ θ
lvincrease by 0.7 DEG C of calculating, that is, Δ θ
lv=0.7 Δ M
ar, Δ M
arfor actual as-fired coal kind moisture is relative to the increment of design coal moisture, unit %.
In one embodiment, described coal consumption variable quantity computing unit specifically for: bring the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment into formula
in, calculate the coal consumption variation delta b that coal varitation causes.
Utilize the present invention, quantitatively can calculate the impact of ature of coal deviation on Thermal generation unit coal consumption, accurately calculate external condition deviation, and then the efficiency level that research genset finally can reach.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disk memory, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Apply specific embodiment in the present invention to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (12)
1. ature of coal deviation computing method that Thermal generation unit coal consumption is affected, it is characterized in that, described computing method comprise:
Measure the actual Coal-fired capacity of boiler, judge whether the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value;
If the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value, according to formula
calculate the variation delta q of boiler solid incomplete combustion loss
4;
According to the station service power consumption rate recruitment Δ λ that the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity causes
Δ B;
Judge whether as-fired coal moisture exceedes pre-set moisture value;
If as-fired coal moisture exceedes pre-set moisture value, according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2;
According to the variation delta q of described boiler solid incomplete combustion loss
4, heat loss due to exhaust gas variation delta q
2, station service power consumption rate recruitment Δ λ
Δ Bcalculate the coal consumption variation delta b that coal varitation causes;
Wherein, C
fhfor the unburned combustible in fly ash of actual as-fired coal, %; A
arfor the ash content of actual as-fired coal, %; Q
ar, netfor actual as-fired coal net calorific value as received basis, kJ/kg; q
4for boiler solid incomplete combustion loss design load, %.
2. ature of coal deviation according to claim 1 computing method that Thermal generation unit coal consumption is affected, it is characterized in that, if the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is not more than predetermined deviation value, make the variation delta q of described boiler solid incomplete combustion loss
4and station service power consumption rate recruitment Δ λ
Δ Bbe zero.
3. the computing method that affect Thermal generation unit coal consumption of ature of coal deviation according to claim 1, is characterized in that, if as-fired coal moisture is no more than pre-set moisture value, make described heat loss due to exhaust gas variation delta q
2be zero.
4. ature of coal deviation according to claim 1 computing method that Thermal generation unit coal consumption is affected, it is characterized in that, according to the station service power consumption rate recruitment Δ λ that the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity causes
Δ B, comprising:
Bring the difference of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity into formula
calculate the station service power consumption rate recruitment Δ λ that furnace coal weight increase causes
Δ B, wherein, Δ B is the difference of the actual Coal-fired capacity of boiler and design coal Coal-fired capacity; W
ffor generated energy.
5. the computing method that affect Thermal generation unit coal consumption of ature of coal deviation according to claim 1, is characterized in that, according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2, comprising: by exhaust gas temperature deviation delta θ
lvbring Δ q into
2=0.0035 Δ θ
lv, calculate heat loss due to exhaust gas variation delta q
2, wherein Δ θ
lv=0.7 Δ M
ar, Δ M
arfor actual as-fired coal kind moisture is relative to the increment of design coal moisture.
6. the computing method that affect Thermal generation unit coal consumption of ature of coal deviation according to any one of claim 1 to 5, is characterized in that, according to the variation delta q of described boiler solid incomplete combustion loss
4, heat loss due to exhaust gas variation delta q
2, station service power consumption rate recruitment Δ λ
Δ Bcalculate the coal consumption variation delta b that coal varitation causes, comprising: bring the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment into formula
in, calculate the coal consumption variation delta b that coal varitation causes, wherein, b
stfor unit design coal consumption, η
bfor boiler efficiency design load, λ is subsidiary engine power consumption design load.
7. an ature of coal deviation calculation element that Thermal generation unit coal consumption is affected, it is characterized in that, described calculation element comprises:
Coal-fired capacity deviate judging unit, for measuring the actual Coal-fired capacity of boiler, judges whether the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value;
Solid variable quantity computing unit, if the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is greater than predetermined deviation value, for according to formula
calculate the variation delta q of boiler solid incomplete combustion loss
4;
Station service power consumption rate recruitment computing unit, for the station service power consumption rate recruitment Δ λ caused according to the mathematic interpolation furnace coal weight increase of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity
Δ B;
Moisture judging unit, for judging whether as-fired coal moisture exceedes pre-set moisture value;
Heat loss due to exhaust gas variable quantity computing unit, if as-fired coal moisture exceedes pre-set moisture value, for according to exhaust gas temperature deviation delta θ
lvcalculate heat loss due to exhaust gas variation delta q
2;
Coal consumption variable quantity computing unit, for the variation delta q according to the incomplete combustion loss of described boiler solid
4, heat loss due to exhaust gas variation delta q
2, station service power consumption rate recruitment Δ λ
Δ Bcalculate the coal consumption variation delta b that coal varitation causes;
Wherein, C
fhfor the unburned combustible in fly ash of actual as-fired coal; A
arfor the ash content of actual as-fired coal; Q
ar, netfor actual as-fired coal net calorific value as received basis; q
4for boiler solid incomplete combustion loss design load.
8. ature of coal deviation according to claim 7 calculation element that Thermal generation unit coal consumption is affected, it is characterized in that, if the deviation of design coal Coal-fired capacity and the actual Coal-fired capacity of described boiler is not more than predetermined deviation value, described solid variable quantity computing unit and station service power consumption rate recruitment computing unit are used for the variation delta q making the incomplete combustion loss of described boiler solid respectively
4and station service power consumption rate recruitment Δ λ
Δ Bbe zero.
9. the calculation element that affects Thermal generation unit coal consumption of ature of coal deviation according to claim 7, it is characterized in that, if as-fired coal moisture is no more than pre-set moisture value, described heat loss due to exhaust gas variable quantity computing unit makes described heat loss due to exhaust gas variation delta q
2be zero.
10. ature of coal deviation according to claim 7 calculation element that Thermal generation unit coal consumption is affected, it is characterized in that, described station service power consumption rate recruitment computing unit specifically for: bring the difference of generated energy and the actual Coal-fired capacity of described boiler and design coal Coal-fired capacity into formula
calculate the station service power consumption rate recruitment Δ λ that furnace coal weight increase causes
Δ B, wherein, Δ B is the difference of the actual Coal-fired capacity of boiler and design coal Coal-fired capacity, W
ffor generated energy.
The calculation element that 11. ature of coal deviations according to claim 7 affect Thermal generation unit coal consumption, is characterized in that, described heat loss due to exhaust gas variable quantity computing unit specifically for: by exhaust gas temperature deviation delta θ
lvbring Δ q into
2=0.0035 Δ θ
lv, calculate heat loss due to exhaust gas variation delta q
2, wherein Δ θ
lv=0.7 Δ M
ar, Δ M
arfor actual as-fired coal kind moisture is relative to the increment of design coal moisture.
The calculation element that 12. ature of coal deviations according to any one of claim 7 to 11 affect Thermal generation unit coal consumption, it is characterized in that, described coal consumption variable quantity computing unit specifically for: bring the variable quantity of described boiler solid incomplete combustion loss, heat loss due to exhaust gas variable quantity, station service power consumption rate recruitment into formula
in, calculate the coal consumption variation delta b that coal varitation causes, wherein, b
stfor unit design coal consumption, η
bfor boiler efficiency design load, λ is subsidiary engine power consumption design load.
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