CN110322096A - A kind of method of determining cogeneration units heat supply coal consumption - Google Patents
A kind of method of determining cogeneration units heat supply coal consumption Download PDFInfo
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Abstract
The present invention relates to a kind of methods of determining cogeneration units heat supply coal consumption, belong to coal-burning power plant's cogeneration of heat and power technical field.The present invention includes the following steps: step 1: calculating separately boiler in cogeneration units and always recepts the caloric per hour Qnet, steam is after steam turbine does work, generator gene-ration revenue P per hourg, heat supply network heat supply income P per hourh, according to the model of " cost benefit ", calculate the thermoelectricity standard yield coal consumption of cogeneration unitsStep 2: in such a way that traditional benefit returns electricity, by net coal consumption rate b, the earning standard coal consumption of cogeneration units power generation part is calculatedWherein, PaIt is active；Step 3: the earning standard coal consumption b of cogeneration units heat supply part is calculatedh=bb‑be；Step 4: the practical heat supply coal consumption b of cogeneration units heat supply part is calculatedhh=bh×Ps, wherein PsIt is caloric value.
Description
Technical field
The present invention relates to a kind of methods of determining cogeneration units heat supply coal consumption, belong to coal-burning power plant's cogeneration of heat and power technology
Field.
Background technique
The principle of tradition evaluation cogeneration units energy consumption is that benefit returns electricity, when calculating cogeneration units net coal consumption rate,
It is zero by the cold source energy for being used for the steam energy of heat supply, can not reflects the effect in the conversion of heat supply working medium energy and transmittance process
Rate.The commonly used heat supply coal consumption of cogeneration units at present is generally 39~41kg/GJ, only with boiler efficiency, pipeline efficiency
It is related with heat supply network heat exchanger efficiency, it can not both embody thermal power plant unit technological transformation and design, steam turbine is done in the process in transformation process
Function power and mechanical efficiency can not also embody the performance driving economy index under thermal power plant unit, heat supply network pipe network difference supplying thermal condition.
In view of this, disclosing a kind of cogeneration units confession in the patent document application No. is 201710533386.6
The ratification method and system of hot phase net coal consumption rate, wherein the method comprising the steps of (1): in non-heating period, determining cogeneration of heat and power
The boiler efficiency and heat consumption rate of unit pure condensate operating condition；Step (2): after heat supply period, the heating parameter of heat supply period unit is counted；
By inquire water and steam property list acquire respectively main steam enthalpy, reheated steam enthalpy, cold reheated steam enthalpy, heating steam extraction enthalpy,
Water supply enthalpy and heating return water enthalpy；Step (3): heat balance diagram is designed according to cogeneration units heat supply period, calculates heating steam extraction vapour
The boiler feed water coefficient and reheated steam share of stream；Step (4): step (2)-step (3) parameter is substituted into preset heating
The rating formula that the power and pure condensed steam steam flow that steam extraction steam flow issues issue obtains the function that corresponding heating steam extraction steam flow issues
The power that rate and pure condensed steam steam flow issue；Step (5): unit is calculated in the heat consumption rate and coa consumption rate of heat supply period.
The practical coal consumption of heat supply part can not quantitatively determine always in cogeneration units operational process, cogeneration units
Operating index, energy saving optimizing lack scientific and reasonable foundation, lead to the method for operation, the administration of energy conservation of current cogeneration units
More extensive, for cogeneration units to meet based on heat demand, energy-saving work has biggish potentiality.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of reasonable in design
The method for determining cogeneration units heat supply coal consumption.
Technical solution used by the present invention solves the above problems is: the side of the determination cogeneration units heat supply coal consumption
Method, the cogeneration units include boiler, steam turbine, generator and heat supply network, and the boiler, generator and heat supply network are and steamer
Machine connection, it is characterized in that: the method for the determining cogeneration units heat supply coal consumption, including the following steps:
Step 1: calculating separately boiler in cogeneration units and always recept the caloric per hour Qnet, and steam does work through steam turbine
Afterwards, generator gene-ration revenue P per hourg, heat supply network heat supply income P per hourh, according to the model of " cost benefit ", calculate thermoelectricity
The thermoelectricity standard yield coal consumption of coproduction unit
Step 2: in such a way that traditional benefit returns electricity, by net coal consumption rate b, cogeneration units Power Generation Section is calculated
The earning standard coal consumption dividedWherein, PaIt is active；
Step 3: the earning standard coal consumption b of cogeneration units heat supply part is calculatedh=bb-be；
Step 4: the practical heat supply coal consumption b of cogeneration units heat supply part is calculatedhh=bh×Ps, wherein PsIt is caloric value.
Further, in the step 1, total caloric receptivity Qnet of boiler is that boiler superheater outlet main steam flow multiplies
Boiler economizer entrance feedwater flow is subtracted multiplied by specific enthalpy, in addition boiler reheater exports main steam flow multiplied by specific enthalpy with specific enthalpy
Boiler reheater entrance main steam flow is subtracted multiplied by specific enthalpy, in addition boiler superheater attemperation water flow is multiplied by specific enthalpy, in addition pot
Furnace reheater flow is multiplied by specific enthalpy.
Further, in the step 2, the calculation formula of net coal consumption rate b are as follows:
Wherein, QSFor external heating load, ηeFor station service power consumption rate.
Compared with prior art, the invention has the following advantages that power generation, heat supply in cogeneration units are separated into two kinds of productions
Product, and the total amount of heat that when steam is produced both products absorbs from boiler separates, respectively to the standard of power generation consumption
It coal amount and is calculated for the standard coal consumption of heat loss, to determine cogeneration units power generation part and heat supply part respectively
Practical coal consumption thoroughly solves in traditional cogeneration units coal consumption calculating method, because belonging to power generation product for hot product
Accessory does not consume energy consumption and can not carry out the problem that practical heat supply coal consumption determines.
Detailed description of the invention
Fig. 1 is the cogeneration units connection relationship diagram of the embodiment of the present invention.
In figure: boiler 1, steam turbine 2, generator 3, heat supply network 4.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
It is shown in Figure 1, it should however be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to match
The revealed content of specification is closed, so that those skilled in the art understands and reads, is not intended to limit the invention implementable
Qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size,
In the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed technology
In the range of appearance can cover.Meanwhile if with reference such as "upper", "lower", "left", "right", " centre " and " one " in this specification
Term, be merely convenient to being illustrated for narration, rather than to limit the scope of the invention, the change of relativeness or
Adjustment, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
The method of determination cogeneration units heat supply coal consumption in the present embodiment, cogeneration units include boiler 1, steamer
Machine 2, generator 3 and heat supply network 4, boiler 1, generator 3 and heat supply network 4 are connect with steam turbine 2, it is characterised in that: determine that thermoelectricity joins
The method for producing unit heat supply coal consumption, including the following steps:
Step 1: calculating separately boiler 1 in cogeneration units, always caloric receptivity Qnet, steam are done through steam turbine 2 per hour
After function, the gene-ration revenue P per hour of generator 3g, the heat supply income P per hour of heat supply network 4h, according to the model of " cost benefit ", calculate
The thermoelectricity standard yield coal consumption of cogeneration units
Step 2: in such a way that traditional benefit returns electricity, by net coal consumption rate b, cogeneration units Power Generation Section is calculated
The earning standard coal consumption dividedWherein, PaIt is active；
Step 3: the earning standard coal consumption b of cogeneration units heat supply part is calculatedh=bb-be；
Step 4: the practical heat supply coal consumption b of cogeneration units heat supply part is calculatedhh=bh×Ps, wherein PsIt is caloric value.
In step one in the present embodiment, total caloric receptivity Qnet of boiler 1 is that boiler superheater outlet main steam flow multiplies
Boiler economizer entrance feedwater flow is subtracted multiplied by specific enthalpy, in addition boiler reheater exports main steam flow multiplied by specific enthalpy with specific enthalpy
Boiler reheater entrance main steam flow is subtracted multiplied by specific enthalpy, in addition boiler superheater attemperation water flow is multiplied by specific enthalpy, in addition pot
Furnace reheater flow is multiplied by specific enthalpy.
In step two in the present embodiment, the calculation formula of net coal consumption rate b are as follows:
Wherein, QSFor external heating load, ηeFor station service power consumption rate.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different, and above content is only to structure of the invention example explanation described in this specification.It is all according to
According to equivalence changes or simple change that the invention patent design structure, feature and principle is done, it is included in this hair
In the protection scope of bright patent.Those skilled in the art can do described specific embodiment various
The mode that the modify or supplement or adopt of various kinds is similar substitutes, and without departing from structure of the invention or surmounts present claims
Range defined in book, is within the scope of protection of the invention.
Claims (3)
1. a kind of method of determining cogeneration units heat supply coal consumption, the cogeneration units include boiler (1), steam turbine
(2), generator (3) and heat supply network (4), the boiler (1), generator (3) and heat supply network (4) are connect with steam turbine (2), feature
It is: the method for the determining cogeneration units heat supply coal consumption, including the following steps:
Step 1: calculating separately boiler in cogeneration units (1), always caloric receptivity Qnet, steam are done through steam turbine (2) per hour
After function, generator (3) gene-ration revenue P per hourg, heat supply network (4) heat supply income P per hourh, according to the model of " cost benefit ",
Calculate the thermoelectricity standard yield coal consumption of cogeneration units
Step 2: in such a way that traditional benefit returns electricity, by net coal consumption rate b, cogeneration units power generation part is calculated
Earning standard coal consumptionWherein, PaIt is active；
Step 3: the earning standard coal consumption b of cogeneration units heat supply part is calculatedh=bb-be；
Step 4: the practical heat supply coal consumption b of cogeneration units heat supply part is calculatedhh=bh×Ps, wherein PsIt is caloric value.
2. the method for determining cogeneration units heat supply coal consumption according to claim 1, it is characterised in that: the step 1
In, total caloric receptivity Qnet of boiler (1) is that boiler superheater exports main steam flow and subtracts boiler economizer entrance multiplied by specific enthalpy
Feedwater flow is multiplied by specific enthalpy, in addition boiler reheater, which exports main steam flow, subtracts boiler reheater entrance main steam multiplied by specific enthalpy
Flow is multiplied by specific enthalpy, in addition boiler superheater attemperation water flow is multiplied by specific enthalpy, in addition boiler reheater flow is multiplied by specific enthalpy.
3. the method for determining cogeneration units heat supply coal consumption according to claim 1, it is characterised in that: the step 2
In, the calculation formula of net coal consumption rate b are as follows:
Wherein, QSFor external heating load, ηeFor station service power consumption rate.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111159624A (en) * | 2019-12-19 | 2020-05-15 | 华电电力科学研究院有限公司 | Method for calculating heat supply coal consumption rate of new steam and extracted steam combined heat supply unit |
| CN111523730A (en) * | 2020-04-23 | 2020-08-11 | 中国华能集团有限公司 | Method for predicting coal consumption of cogeneration unit |
| CN111612308A (en) * | 2020-04-24 | 2020-09-01 | 国网河北省电力有限公司电力科学研究院 | General calculation method for evaluating coal consumption index of coal-fired heat supply unit |
| CN112069443A (en) * | 2020-08-04 | 2020-12-11 | 国网山东省电力公司电力科学研究院 | Coal pressure reduction calculation method and system for heat supply substitution of cogeneration unit |
| CN113052466A (en) * | 2021-03-29 | 2021-06-29 | 润电能源科学技术有限公司 | Coal-fired coupled sludge generator set coal-fired consumption rate calculation method and device |
| CN113434804A (en) * | 2021-06-23 | 2021-09-24 | 天津华能杨柳青热电有限责任公司 | Heat supply coal consumption calculation method based on unchanged power generation coal consumption |
| CN113468732A (en) * | 2021-06-22 | 2021-10-01 | 西安热工研究院有限公司 | System and method for determining production cost for heat supply of steam extraction heat supply unit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111159624A (en) * | 2019-12-19 | 2020-05-15 | 华电电力科学研究院有限公司 | Method for calculating heat supply coal consumption rate of new steam and extracted steam combined heat supply unit |
| CN111159624B (en) * | 2019-12-19 | 2023-08-04 | 华电电力科学研究院有限公司 | Method for calculating heat supply coal consumption rate of new steam and steam extraction combined heat supply unit |
| CN111523730A (en) * | 2020-04-23 | 2020-08-11 | 中国华能集团有限公司 | Method for predicting coal consumption of cogeneration unit |
| CN111612308A (en) * | 2020-04-24 | 2020-09-01 | 国网河北省电力有限公司电力科学研究院 | General calculation method for evaluating coal consumption index of coal-fired heat supply unit |
| CN111612308B (en) * | 2020-04-24 | 2023-01-17 | 国网河北省电力有限公司电力科学研究院 | General calculation method for evaluating coal consumption index of coal-fired heat supply unit |
| CN112069443A (en) * | 2020-08-04 | 2020-12-11 | 国网山东省电力公司电力科学研究院 | Coal pressure reduction calculation method and system for heat supply substitution of cogeneration unit |
| CN112069443B (en) * | 2020-08-04 | 2023-10-20 | 国网山东省电力公司电力科学研究院 | Coal pressure reduction calculation method and system for heat supply substitution of cogeneration unit |
| CN113052466A (en) * | 2021-03-29 | 2021-06-29 | 润电能源科学技术有限公司 | Coal-fired coupled sludge generator set coal-fired consumption rate calculation method and device |
| CN113468732A (en) * | 2021-06-22 | 2021-10-01 | 西安热工研究院有限公司 | System and method for determining production cost for heat supply of steam extraction heat supply unit |
| CN113434804A (en) * | 2021-06-23 | 2021-09-24 | 天津华能杨柳青热电有限责任公司 | Heat supply coal consumption calculation method based on unchanged power generation coal consumption |
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Application publication date: 20191011 |