CN113283701B - Power generation and heat supply coal consumption accounting system under conventional operation mode of thermal power generating unit - Google Patents
Power generation and heat supply coal consumption accounting system under conventional operation mode of thermal power generating unit Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 116
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- 238000004364 calculation method Methods 0.000 claims abstract description 83
- 238000004519 manufacturing process Methods 0.000 claims abstract description 62
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Abstract
The invention relates to an index accounting system for counter-balance power generation and heat supply coal consumption rate under a conventional operation mode of a thermal power generating unit, which comprises an auxiliary production heat consumption calculation module, a cold source heat loss calculation module, a power generation heat consumption calculation module, a total heat consumption calculation module of a steam turbine, a boiler output heat calculation module, a boiler input heat calculation module, a heat supply sharing ratio calculation module, a standard coal amount calculation module for charging and a standard coal amount calculation module for power generation consumption. The invention can solve the problems of difficult calculation of counter balance power generation and heat supply coal consumption rate under the conditions of auxiliary production heat, frequent variable working condition operation of a unit, missing or low precision of a metering meter in an intermediate production process link and the like in a conventional operation mode, is convenient for energy-saving management work of thermal power enterprises, and brings great convenience for fuel management work of thermal power enterprises.
Description
Technical Field
The invention belongs to the technical field of energy conservation and economic index management of thermal power units, and particularly relates to a power generation and heat supply coal consumption accounting system under a conventional operation mode of a thermal power unit.
Background
The counter-balance power generation and heat supply coal consumption rate index calculation of the thermal power generating unit are carried out under the specific operation mode and the system isolation condition, the energy of a main system and an auxiliary system of the thermal power generating unit is in a stable balance state, and the counter-balance power generation and heat supply coal consumption rate index calculation is obtained by calculating through a logic relation formula of related parameters. Under the conventional operation mode, many production auxiliary systems cannot be isolated for a long time, the operation mode (a pure condensation operation mode, a drawing condensation operation mode, a low-pressure cylinder zero-power mode, a high back pressure mode and the like) of a unit is often changed, the energy balance relation in the system isolation state is broken, the logic relation of the indexes of the counter balance power generation and the heat supply coal consumption according to the industry standard is calculated, the actual index accounting requirement cannot be met, especially the index in a longer operation time section is calculated, and the counter balance power generation and the heat supply coal consumption index calculation formula of the thermal power unit in the industry standard cannot meet the actual index accounting requirement due to the frequent variable working condition operation of the unit. The problems that the meter is lost or the accuracy is low in some intermediate production process links of the thermal power generating unit of enterprises, and the counter balance power generation and heat supply coal consumption rate cannot be calculated normally are also very remarkable. And certain difficulties are brought to energy-saving management and fuel management work of thermal power enterprises.
Disclosure of Invention
The invention aims to provide a power generation and heat supply coal consumption accounting system under a conventional operation mode of a thermal power generating unit, and solves the problems that under the conditions of auxiliary production heat, frequent variable working condition operation of the unit, missing or low precision of a metering meter in an intermediate production process link, and the like, the counter balance power generation and heat supply coal consumption rate are difficult to calculate.
The invention provides a counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit, which comprises the following components:
the auxiliary production heat consumption calculation module is used for counting relevant parameters of auxiliary production heat in the accounting interval and calculating auxiliary production heat consumption; the related parameters comprise raw water flow, raw water temperature rise, steam flow for steam heating, water heating flow, temperature drop, inlet and outlet temperature rise of a heater and thermal parameters for urea hydrolysis;
the cold source heat loss calculation module is used for obtaining the corresponding condenser cooling water flow under different combination modes of the circulating water pump in the conventional operation mode, counting the temperature rise of the circulating water of the condenser in the accounting interval and calculating the heat loss of the cold source;
the power generation and heat consumption calculation module is used for counting the power generation amount of the thermal power unit in the accounting interval; converting the generated energy into the internal work of the steam turbine; converting the internal work of the steam turbine into heat, and calculating to obtain power generation heat consumption according to the calculated heat loss of the cold source;
the turbine total heat consumption calculation module is used for calculating the turbine total heat consumption according to the calculated and obtained turbine power generation heat consumption, heat supply quantity and production auxiliary heat consumption;
the boiler output heat calculating module is used for calculating the output heat of the boiler according to the total heat consumption of the steam turbine, the pipeline efficiency and the heat loss of boiler pollution discharge;
the boiler input heat calculation module is used for calculating and obtaining boiler input heat according to boiler output heat and test boiler efficiency;
the heat supply sharing ratio calculation module is used for calculating the heat supply sharing ratio according to the heat supply quantity, the production auxiliary heat consumption and the total heat consumption of the steam turbine obtained by statistics and calculation;
the standard coal amount calculation module is used for calculating the standard coal amount of the furnace through the input heat of the boiler and the low-level heating value of the standard coal;
the standard coal consumption amount calculation module is used for calculating according to the standard coal amount fed into the furnace and the heat supply allocation ratio to obtain the standard coal amount for heat supply consumption, and subtracting the standard coal amount for heat supply consumption from the total standard coal amount fed into the furnace to obtain the standard coal amount for power generation consumption;
and the power generation and heat supply coal consumption rate calculation module is used for dividing the power generation consumption standard coal amount by the generated energy to obtain the power generation coal consumption rate according to the calculated power generation consumption standard coal amount and dividing the heat supply consumption standard coal amount by the heat supply amount to obtain the heat supply coal consumption rate.
Further, the auxiliary production heat consumption calculation module calculates auxiliary production heat consumption according to the following formula:
cold air quantity
Wherein: c (C) 1 、C 2 、C 3 、C 0 -regressing a constant obtained by a corresponding equation of the cold air quantity and the main steam flow quantity of the boiler;
D main steam Main steam flow (t/h)
Heat Q for air heater Air heater ＝0.278V Cold air C p ×Δt×h/1000(GJ)
Wherein: c (C) p Cold air constant pressure specific heat (kJ/kg. ℃ C.)
Delta t-temperature rise of cold air in air heater (DEG C)
h-accounting time (hours)
Counting the number of the steam soot blowers of the boiler, the soot blowing time, the steam consumption and the steam parameters, and calculating the heat consumption of the steam soot blowing of the boiler;
boiler steam soot blowing heat consumption
Wherein: d (D) Soot blowing -accounting interval steam soot blowing gas consumption (t/h)
h' -soot blowing steam enthalpy value (kj/kg)
Enthalpy value of desalted water (kj/kg)
Counting the flow of raw water heating steam and the temperature rise of a raw water heater, and calculating the heat consumption of the raw water heating steam;
raw water heating steam consuming heat Q Raw water ＝4.1868×D Raw water ×Δt×h/1000(GJ)
Wherein: d (D) Raw water Raw water flow rate (t/h) in accounting section
Delta t-raw water heating temperature rise (DEG C)
Counting steam flow and steam parameters for a fuel defrosting warehouse, a steam heating production bath, and calculating steam consumption heat;
fuel defrosting warehouse, steam heating production and bath heat Q Thawing, steam heating and bathing pool ＝D Thawing, steam heating and bathing pool ×ΔQ×h/1000(GJ)
Wherein: d (D) Thawing, steam heating and bathing pool -nuclear interval fuel defrosting warehouse, production steam heating, production bath air consumption (t/h)
DeltaQ-steam exotherm (kj/kg)
Acquiring water flow of a water heating system for test production, counting temperature difference of water heating water supply and return, and calculating heat for water heating production;
production of heat Q for water heating Water heating device ＝4.1868×D Water heating device ×Δt×h/1000(GJ)
Deaerator carries heat
Wherein: d (D) Oxygen scavenging -accounting the oxygen removal steam flow of the deaerator in the interval, and selecting (t/h) according to the design share
h' -deaerator exhaust steam enthalpy value (kj/kg)
Enthalpy value of desalted water (kj/kg)
Counting steam flow and steam parameters for urea hydrolysis, and calculating urea hydrolysis heat consumption;
heat Q for urea hydrolysis Hydrolysis ＝D Hydrolysis ×ΔQ×h/1000(GJ)
Wherein: d (D) Hydrolysis -accounting interval urea hydrolysis gas consumption (t/h)
DeltaQ-urea hydrolysis steam exotherm (kj/kg)
Q Production aid ＝Q Air heater +Q Soot blowing +Q Raw water +Q Thawing, steam heating and bathing pool +Q Water heating device +Q Oxygen scavenging +Q Hydrolysis (GJ)
Further, the cold source heat loss calculation module calculates the cold source heat loss according to the following formula:
heat loss Q of cold source Cold source ＝4.1868×D Cold source ×Δt×h/1000(GJ)
Wherein: d (D) Cold source -accounting the condenser cooling water flow (t/h) in the interval
Δt-condenser cooling water temperature rise (. Degree.C.).
Further, the electricity consumption calculation module calculates electricity consumption according to the following formula:
conversion of generated energy into heat
Total power generation consumption Q Generating electricity ＝Q Electric quantity +Q Cold source (GJ)
Wherein: nn-accounting interval unit generating capacity (ten thousands kW.h)
η Electric generator Generator efficiency (%). Further, the turbine total heat consumption calculation module calculates the turbine total heat consumption according to the following formula:
total heat consumption Q of steam turbine Steam turbine ＝Q Generating electricity +Q Heat supply quantity +Q Production aid (GJ)。
Further, the boiler output heat calculation module calculates the boiler output heat according to the following formula:
boiler pollution discharge heat loss Q Pollution discharge ＝4.1868×α Pollution discharge ×D Main steam ×Δt×h/1000(GJ)
Wherein alpha is Pollution discharge -boiler blow-down water share
Deltat-the difference between the temperature of the boiler blow-down water outlet and the temperature of desalted water (DEG C)
Heat output from boiler
Further, the boiler input heat calculation module calculates the boiler input heat according to the following formula:
heat input to boiler
Further, the heating split ratio calculation module calculates a heating split ratio according to:
heat supply sharing ratio
Further, the standard coal amount calculation module calculates the standard coal amount according to the following formula:
standard coal quantity into furnace
Further, the standard coal amount for power generation is calculated by the standard coal amount calculation module according to the following formula:
standard coal quantity B for heat supply consumption Heating supply ＝α Heating supply ×B(t)
Standard coal quantity B for power generation consumption Generating electricity ＝B-B Heating supply (t)
The power generation and heat supply coal consumption rate calculation module calculates power generation and heat supply coal consumption rates according to the following steps:
power generation coal consumption rate
Rate of coal consumption for heat supply
Wherein Nn-accounting interval unit generating capacity (ten thousands kW.h)
Q Heating supply -accounting for inter-block unit heat supply (GJ).
By means of the scheme, the power generation and heat supply coal consumption accounting system under the conventional operation mode of the thermal power generating unit can solve the problems that under the conventional operation mode, the auxiliary production heat, the unit frequently-changing working condition operation and the middle production process link, namely, the meter is absent or the accuracy is low, the counter balance power generation and heat supply coal consumption rate is difficult to calculate, the energy-saving management work of thermal power enterprises is facilitated, and great convenience is brought to the fuel management work of the thermal power enterprises.
Drawings
FIG. 1 is a schematic diagram of a counter-balance power generation and heat supply coal consumption rate index accounting flow under a conventional operation mode of a thermal power generating unit;
fig. 2 is a graph of energy loss of a thermal power plant.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, the counter balance power generation and heat supply coal consumption index accounting frame in the conventional operation mode of the thermal power generating unit comprises a boiler input heat 1, a boiler output heat 2, various lost heat 3 of the boiler, a boiler pollution discharge heat loss 4, a steam turbine total heat consumption 5, a pipeline heat loss 6, a power generation conversion heat 7, a cold source loss heat 8, a production auxiliary heat consumption 9, a heat supply 10, a boiler air heater heat consumption 11, a boiler heating surface soot blowing heat consumption 12, a raw water heating heat consumption 13, a fuel thawing warehouse heat consumption 14, a production steam heating heat consumption 15, a production water heating heat consumption 16, a production bath heat consumption 17, a deaerator oxygen discharge carrying heat consumption 18 and a urea hydrolysis heat consumption 19.
The embodiment provides a counter balance electricity generation and heat supply coal consumption rate index accounting system under thermal power generating unit normal operation mode, includes:
the auxiliary production heat consumption calculation module is used for counting relevant parameters of auxiliary production heat in the accounting interval and calculating auxiliary production heat consumption; the related parameters comprise raw water flow, raw water temperature rise, steam flow for steam heating, water heating flow, temperature drop, inlet and outlet temperature rise of a heater and thermal parameters for urea hydrolysis;
the cold source heat loss calculation module is used for obtaining the corresponding condenser cooling water flow under different combination modes of the circulating water pump in the conventional operation mode, counting the temperature rise of the circulating water of the condenser in the accounting interval and calculating the heat loss of the cold source;
the power generation and heat consumption calculation module is used for counting the power generation amount of the thermal power unit in the accounting interval; converting the generated energy into the internal work of the steam turbine; converting the internal work of the steam turbine into heat, and calculating to obtain power generation heat consumption according to the heat loss of the cold source obtained by calculation;
the turbine total heat consumption calculation module is used for calculating the turbine total heat consumption according to the calculated and obtained turbine power generation heat consumption, heat supply quantity and production auxiliary heat consumption;
the boiler output heat calculating module is used for calculating the output heat of the boiler according to the total heat consumption of the steam turbine, the pipeline efficiency and the heat loss of boiler pollution discharge;
the boiler input heat calculation module is used for calculating and obtaining boiler input heat according to boiler output heat and test boiler efficiency;
the heat supply sharing ratio calculation module is used for calculating the heat supply sharing ratio according to the heat supply quantity, the production auxiliary heat consumption and the total heat consumption of the steam turbine obtained by statistics and calculation;
the standard coal amount calculation module is used for calculating the standard coal amount of the furnace through the input heat of the boiler and the low-level heating value of the standard coal;
the standard coal consumption amount calculation module is used for calculating according to the standard coal amount fed into the furnace and the heat supply allocation ratio to obtain the standard coal amount for heat supply consumption, and subtracting the standard coal amount for heat supply consumption from the total standard coal amount fed into the furnace to obtain the standard coal amount for power generation consumption;
and the power generation and heat supply coal consumption rate calculation module is used for dividing the power generation consumption standard coal amount by the generated energy to obtain the power generation coal consumption rate according to the calculated power generation consumption standard coal amount and dividing the heat supply consumption standard coal amount by the heat supply amount to obtain the heat supply coal consumption rate.
Through the counter balance power generation and heat supply coal consumption rate index accounting system under the conventional operation mode of the thermal power generating unit, counter balance power generation and heat supply coal consumption rate accounting is carried out according to the requirements each time, and the main economic index of the thermal power generating unit is scientifically managed, so that the energy-saving management work of thermal power enterprises is facilitated, and great convenience is brought to the fuel management work of the thermal power enterprises.
In this embodiment, the auxiliary production heat consumption calculation module calculates the auxiliary production heat consumption according to the following formula:
and calculating the heat quantity for the boiler heater. According to the cold air (air supply and primary air) quantity and the main steam flow data of the boiler provided by the boiler thermodynamic calculation book, returning the cold air quantity of the boiler into an equation corresponding to the main steam flow one by one, and counting the inlet and outlet temperatures of the heater in the accounting interval. And calculating the heat quantity for the boiler heater.
Cold air quantity
Wherein: c (C) 1 、C 2 、C 3 、C 0 -regressing a constant obtained by a corresponding equation of the cold air quantity and the main steam flow quantity of the boiler;
D main steam Main steam flow (t/h)
Heat Q for air heater Air heater ＝0.278V Cold air C p ×Δt×h/1000(GJ)
Wherein: c (C) p Cold air constant pressure specific heat (kJ/kg. ℃ C.)
Delta t-temperature rise of cold air in air heater (DEG C)
h-accounting time (hours)
Counting the number of the steam soot blowers of the boiler, the soot blowing time, the steam consumption and the steam parameters, and calculating the heat consumption of the steam soot blowing of the boiler;
boiler steam soot blowing heat consumption
Wherein: d (D) Soot blowing -accounting interval steam soot blowing gas consumption (t/h)
h' -soot blowing steam enthalpy value (kj/kg)
Enthalpy value of desalted water (kj/kg)
Counting the flow of raw water heating steam and the temperature rise of a raw water heater, and calculating the heat consumption of the raw water heating steam;
raw water heating steam consuming heat Q Raw water ＝4.1868×D Raw water ×Δt×h/1000(GJ)
Wherein: d (D) Raw water Raw water flow rate (t/h) in accounting section
Delta t-raw water heating temperature rise (DEG C)
Counting steam flow and steam parameters for a fuel defrosting warehouse, a steam heating production bath, and calculating steam consumption heat;
fuel defrosting warehouse, steam heating production and bath heat Q Thawing, steam heating and bathing pool ＝D Thawing, steam heating and bathing pool ×ΔQ×h/1000(GJ)
Wherein: d (D) Thawing, steam heating and bathing pool -accounting interval fuel defrosting warehouse, production steam heating, production bath air consumption (t/h) Δq-steam heat release (kj/kg)
Acquiring water flow of a water heating system for test production, counting temperature difference of water heating water supply and return, and calculating heat for water heating production;
production of heat Q for water heating Water heating device ＝4.1868×D Water heating device ×Δt×h/1000(GJ)
Deaerator carries heat
Wherein: d (D) Oxygen scavenging -accounting the oxygen removal steam flow of the deaerator in the interval, and selecting (t/h) according to the design share
h' -deaerator exhaust steam enthalpy value (kj/kg)
Enthalpy value of desalted water (kj/kg)
Counting steam flow and steam parameters for urea hydrolysis, and calculating urea hydrolysis heat consumption;
heat Q for urea hydrolysis Hydrolysis ＝D Hydrolysis ×ΔQ×h/1000(GJ)
Wherein: d (D) Hydrolysis -accounting interval urea hydrolysis gas consumption (t/h)
DeltaQ-urea hydrolysis steam exotherm (kj/kg)
Q Production aid ＝Q Air heater +Q Soot blowing +Q Raw water +Q Thawing, steam heating and bathing pool +Q Water heating device +Q Oxygen scavenging +Q Hydrolysis (GJ)
Further, the cold source heat loss calculation module calculates the cold source heat loss according to the following formula:
heat loss Q of cold source Cold source ＝4.1868×D Cold source ×Δt×h/1000(GJ)
Wherein: d (D) Cold source -accounting the condenser cooling water flow (t/h) in the interval
Δt-condenser cooling water temperature rise (. Degree.C.).
Further, the electricity consumption calculation module calculates electricity consumption according to the following formula:
conversion of generated energy into heat
Total power generation consumption Q Generating electricity ＝Q Electric quantity +Q Cold source (GJ)
Wherein: nn-accounting interval unit generating capacity (ten thousands kW.h)
η Electric generator Generator efficiency (%).
Further, the turbine total heat consumption calculation module calculates the turbine total heat consumption according to the following formula:
total heat consumption Q of steam turbine Steam turbine ＝Q Generating electricity +Q Heat supply quantity +Q Production aid (GJ)。
Further, the boiler output heat calculation module calculates the boiler output heat according to the following formula:
boiler pollution discharge heat loss Q Pollution discharge ＝4.1868×α Pollution discharge D Main steam ×Δt×h/1000(GJ)
Wherein alpha is Pollution discharge -boiler blow-down water share
Deltat-the difference between the temperature of the boiler blow-down water outlet and the temperature of desalted water (DEG C)
Heat output from boiler
Further, the boiler input heat calculation module calculates the boiler input heat according to the following formula:
heat input to boiler
Further, the heating split ratio calculation module calculates a heating split ratio according to:
heat supply sharing ratio
Further, the standard coal amount calculation module calculates the standard coal amount according to the following formula:
standard coal quantity into furnace
Further, the standard coal amount for power generation is calculated by the standard coal amount calculation module according to the following formula:
standard coal quantity B for heat supply consumption Heating supply ＝α Heating supply ×B(t)
Standard coal quantity B for power generation consumption Generating electricity ＝B-B Heating supply (t)
The power generation and heat supply coal consumption rate calculation module calculates the heat supply coal consumption rate according to the following steps:
power generation coal consumption rate
Rate of coal consumption for heat supply
Wherein Nn-accounting interval unit generating capacity (ten thousands kW.h)
Q Heating supply -accounting for inter-block unit heat supply (GJ).
The calculation process is only related to the heat input and output system of the thermal power generating unit, is irrelevant to the middle process and indexes, and can meet the requirement of calculation of the power generation and heat supply coal consumption rate of the thermal power generating unit in various conventional operation modes such as a pure condensation operation mode, a condensation drawing operation mode, a low-pressure cylinder zero-power mode, a high-back pressure mode and the like. The method solves the problems that under the conventional operation mode, the auxiliary production heat cannot be isolated, the balance relation of the turbine heat consumption rate calculation equation is damaged due to factors such as the change of the unit variable working condition operation mode, and the like, and the accuracy of power generation and heat supply coal consumption rate accounting under the conventional operation mode of the thermal power unit is seriously affected. The problems that meters are lost or the accuracy is low in some units in the middle production process links, and the counter balance power generation and heat supply coal consumption rate cannot be calculated are solved. The calculation process is suitable for solidification by using Excel or other computer languages to prepare small programs, and each time of counter balance power generation and heat supply coal consumption rate calculation is carried out, only a small amount of basic parameters in the calculation interval are input, the calculation result can be obtained immediately after the calculation program is operated once, and the analysis process is greatly simplified. The calculation process is also suitable for being used as an SIS report of a unit, is convenient for carrying out real-time tracking of counter-balance power generation and heat supply coal consumption rate indexes, performs statistical analysis management work on day, week, month and year, and is also suitable for calculating a month or year power generation and heat supply coal consumption rate index plan. The energy-saving management work of the thermal power enterprises is facilitated, and great convenience is brought to the fuel management work of the thermal power enterprises.
Examples
See the following table
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a thermal power generating unit is in counter balance electricity generation under conventional operation mode and heat supply coal consumption rate index accounting system, its characterized in that includes:
the auxiliary production heat consumption calculation module is used for counting relevant parameters of auxiliary production heat in the accounting interval and calculating auxiliary production heat consumption; the related parameters comprise raw water flow, raw water temperature rise, steam flow for steam heating, water heating flow, temperature drop, inlet and outlet temperature rise of a heater and thermal parameters for urea hydrolysis;
the cold source heat loss calculation module is used for obtaining the corresponding condenser cooling water flow under different combination modes of the circulating water pump in the conventional operation mode, counting the temperature rise of the circulating water of the condenser in the accounting interval and calculating the heat loss of the cold source;
the power generation and heat consumption calculation module is used for counting the power generation amount of the thermal power unit in the accounting interval; converting the generated energy into the internal work of the steam turbine; converting the internal work of the steam turbine into heat, and calculating to obtain power generation heat consumption according to the calculated heat loss of the cold source;
the turbine total heat consumption calculation module is used for calculating the turbine total heat consumption according to the power generation heat consumption, the heat supply heat consumption and the production auxiliary heat consumption which are obtained through statistics and calculation;
the boiler output heat calculating module is used for calculating the output heat of the boiler according to the total heat consumption of the steam turbine, the pipeline efficiency and the heat loss of boiler pollution discharge;
the boiler input heat calculation module is used for calculating and obtaining boiler input heat according to boiler output heat and test boiler efficiency;
the heat supply sharing ratio calculation module is used for calculating the heat supply sharing ratio according to the heat supply quantity, the production auxiliary heat consumption and the total heat consumption of the steam turbine obtained by statistics and calculation;
the standard coal amount calculation module is used for calculating the standard coal amount of the furnace through the input heat of the boiler and the low-level heating value of the standard coal;
the standard coal consumption amount calculation module is used for calculating according to the standard coal amount fed into the furnace and the heat supply allocation ratio to obtain the standard coal amount for heat supply consumption, and subtracting the standard coal amount for heat supply consumption from the total standard coal amount fed into the furnace to obtain the standard coal amount for power generation consumption;
and the power generation and heat supply coal consumption rate calculation module is used for dividing the power generation consumption standard coal amount by the generated energy to obtain the power generation coal consumption rate according to the calculated power generation consumption standard coal amount and dividing the heat supply consumption standard coal amount by the heat supply amount to obtain the heat supply coal consumption rate.
2. The counter balance power generation and heat supply coal consumption rate index accounting system in a conventional operation mode of a thermal power generating unit according to claim 1, wherein the auxiliary production heat consumption calculation module calculates auxiliary production heat consumption according to the following formula:
cold air quantityThe unit is t/h;
wherein: c (C) 1 、C 2 、C 3 、C 0 -regressing a constant obtained by a corresponding equation of the cold air quantity and the main steam flow quantity of the boiler;
D main steam -main steam flow in t/h;
heat Q for air heater Air heater ＝0.278V Cold air C p XDeltat×h/1000 in GJ;
wherein: c (C) p -cold air constant pressure specific heat, the unit is kJ/kg. ℃;
delta t-temperature rise of cold air in a heater is shown in the unit of DEG C;
h-accounting time in hours;
counting the number of the steam soot blowers of the boiler, the soot blowing time, the steam consumption and the steam parameters, and calculating the heat consumption of the steam soot blowing of the boiler;
boiler steam soot blowing heat consumptionThe unit is GJ;
wherein: d (D) Soot blowing -accounting the steam soot blowing gas consumption in t/h;
h' -the enthalpy value of soot blowing steam with the unit of kj/kg;
-enthalpy of demineralized water in kj/kg;
counting the flow of raw water heating steam and the temperature rise of a raw water heater, and calculating the heat consumption of the raw water heating steam;
raw water heating steam consuming heat Q Raw water ＝4.1868×D Raw water XDeltat×h/1000 in GJ;
wherein: d (D) Raw water -accounting for interval raw water flow in t/h;
delta t-raw water heating temperature rise with the unit of DEG C;
counting steam flow and steam parameters for a fuel defrosting warehouse, a steam heating production bath, and calculating steam consumption heat;
fuel defrosting warehouse, steam heating production and bath heat Q Thawing, steam heating and bathing pool ＝D Thawing, steam heating and bathing pool XΔQ×h/1000 in GJ;
wherein: d (D) Thawing, steam heating and bathing pool -fuel thawing warehouse in accounting section, steam heating production, gas consumption in bath in t/h; delta Q-steam exotherm in kj/kg;
acquiring water flow of a water heating system for test production, counting temperature difference of water heating water supply and return, and calculating heat for water heating production;
production of heat Q for water heating Water heating device ＝4.1868×D Water heating device XDeltat×h/1000 in GJ;
deaerator carries heatThe unit is GJ;
wherein: d (D) Oxygen scavenging -accounting the oxygen removal steam flow of the deaerator in the interval, wherein the unit is t/h;
h' -the enthalpy value of the exhaust steam of the deaerator is kj/kg;
-enthalpy of demineralized water in kj/kg;
counting steam flow and steam parameters for urea hydrolysis, and calculating urea hydrolysis heat consumption;
heat Q for urea hydrolysis Hydrolysis ＝D Hydrolysis XΔQ×h/1000 in GJ;
wherein: d (D) Hydrolysis -accounting for the urea hydrolysis gas consumption in t/h;
delta Q-urea hydrolysis steam exotherm in kj/kg;
Q production aid ＝Q Air heater +Q Soot blowing +Q Raw water +Q Thawing, steam heating and bathing pool +Q Water heating device +Q Oxygen scavenging +Q Hydrolysis The unit is GJ.
3. The counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit according to claim 1, wherein the cold source lost heat calculation module calculates cold source lost heat according to the following formula:
heat loss Q of cold source Cold source ＝4.1868×D Cold source XDeltat×h/1000 in GJ;
wherein: d (D) Cold source The flow rate of cooling water of the condenser in the accounting interval is t/h;
Δt, the temperature of the condenser cooling water rises in the unit of ℃.
4. The counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit according to claim 1, wherein the power generation and heat consumption amount calculation module calculates power generation and heat consumption amount according to the following formula:
conversion of generated energy into heatThe unit is GJ;
total power generation consumption Q Generating electricity ＝Q Electric quantity +Q Cold source The unit is GJ;
wherein: nn-accounting interval unit generating capacity, the unit is ten thousands kW.h;
η electric generator -generator efficiency in%.
5. The counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit according to claim 1, wherein the turbine total heat consumption calculation module calculates the turbine total heat consumption according to the following formula:
total heat consumption Q of steam turbine Steam turbine ＝Q Generating electricity +Q Heat supply quantity +Q Production aid The unit is GJ.
6. The counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit according to claim 1, wherein the boiler output heat calculation module calculates the boiler output heat according to the following formula:
boiler pollution discharge heat loss Q Pollution discharge ＝4.1868×α Pollution discharge ×D Main steam XDeltat×h/1000 in GJ;
wherein alpha is Pollution discharge -boiler blow-down water share
Deltat, the difference between the water temperature of the boiler blow-down water outlet and the desalted water temperature, is expressed in DEG C;
heat output from boilerThe unit is GJ.
7. The counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit according to claim 1, wherein the boiler input heat calculation module calculates the boiler input heat according to the following formula:
heat input to boilerThe unit is GJ/h.
8. The counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit according to claim 1, wherein the heat supply split ratio calculating module calculates a heat supply split ratio according to the following formula:
heat supply sharing ratio
9. The counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit according to claim 1, wherein the standard coal amount in the furnace is calculated by the standard coal amount calculation module according to the following formula:
standard coal quantity into furnaceThe unit is t.
10. The counter balance power generation and heat supply coal consumption rate index accounting system under a conventional operation mode of a thermal power generating unit according to claim 1, wherein the standard coal consumption amount calculation module for power generation calculates the standard coal consumption amount for power generation according to the following formula:
standard coal quantity B for heat supply consumption Heating supply ＝α Heating supply X B in t;
standard coal quantity B for power generation consumption Generating electricity ＝B-B Heating supply The unit is t;
the power generation and heat supply coal consumption rate calculation module calculates power generation and heat supply coal consumption rates according to the following steps:
power generation coal consumption rateThe unit is g/kW.h;
rate of coal consumption for heat supplyThe unit is kg/GJ;
wherein Nn-the power generation amount of the unit in the accounting interval is ten thousands kW.h;
Q heating supply The unit of the accounting interval unit supplies heat with the unit GJ.
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