CN104090560A - Device monitoring power supply integrated environment evaluation indexes - Google Patents

Device monitoring power supply integrated environment evaluation indexes Download PDF

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Publication number
CN104090560A
CN104090560A CN201410341547.8A CN201410341547A CN104090560A CN 104090560 A CN104090560 A CN 104090560A CN 201410341547 A CN201410341547 A CN 201410341547A CN 104090560 A CN104090560 A CN 104090560A
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integrated environment
environment evaluation
cogeneration plant
evaluation index
value
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CN104090560B (en
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胡妍
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Inner Mongolia Yungu Electric Power Science and Technology Co., Ltd.
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胡妍
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

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  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention provides a device monitoring power supply integrated environment evaluation indexes. The device comprises a central controller, a display unit, a remote sensor unit, a transmission system and an alarm system. The remote sensor unit senses operating parameters of components of a thermal power plant. The transmission system converts measured values obtained through sensing into standard electrical signals and uploads the electrical signals to the central controller. The central controller conducts computing processing on the uploaded parameter electrical signals, carries out evaluation on the overall integrated environment evaluation indexes of the thermal power plant, judges whether the integrated environment evaluation indexes of the thermal power plant reach the standard or not, and transmits an alarm signal to the alarm system if the integrated environment evaluation indexes of the thermal power plant exceed predetermined values. An alarm is triggered, and abnormal components and abnormal parameters of the abnormal components are displayed on the display unit.

Description

A kind of equipment of monitoring power supply integrated environment evaluation index
Technical field
The present invention relates to a kind of equipment of monitoring power supply integrated environment evaluation index, belong to cogeneration plant's automatic control system.
Background technology
As everyone knows, problem of environmental pollution has become the major issue of restriction China economic development, in the energy-consuming of China, consumption of coal accounting is very high, particularly, coal generating be take as main country in China, and annual coal for power generation accounts for half of the annual coal total amount of China.Coal-burning power plant, when producing electric energy, also causes the massive discharge of pollutants such as flue dust, sulphuric dioxide, carbon dioxide, oxides of nitrogen and waste water.At present, net coal consumption rate is often usingd as the final index of examining power plant's performance driving economy in coal-burning power plant, and net coal consumption rate is not considered the pollution that power plant's operation causes environment, does not consider the problems such as use value of water resource yet.The implementation and the electric system that along with China's power plant for energy conservation, reduce discharging measure are separated the factory and network, surf the Net at a competitive price the progressively enforcement of measure, if still using traditional net coal consumption rate as performance assessment criteria, or using it as power plant, optimize the quotation foundation of operation and rate for incorporation into the power network, not only do not meet reality, nor be beneficial to the improvement of environment and the improvement of pollutant, so should seek a kind of equipment of monitoring cogeneration plant's environmental economy index, and dynamically adjust the operation of cogeneration plant with this, thereby accomplish that saving energy, lowering energy consumption and reducing pollutants discharge reduce pollution.
Summary of the invention
The expense of cogeneration plant's electrical energy production is divided into energy cost, non-energy expense and environmental hazard expense three parts.Cogeneration plant produces electric energy and wants consume fuel and water resource, the energy cost part in thermoelectric power that Here it is production; For cogeneration plant is normally moved, must there be wage, bonus, welfare of depreciation, maintenance, management and the personnel of factory building and equipment etc., Here it is so-called non-energy expense; Thermoelectric power has waste water, waste gas and waste residue to discharge in producing, formed environmental pollution expense.
Mainly consider in the present invention energy cost part and the environmental pollution expense part of cogeneration plant, and these two expenses are analyzed and drawn from the operational factor of cogeneration plant, evaluated.Invention major programme is as follows:
Scheme one:
An equipment of monitoring power supply integrated environment evaluation index, comprising: transmission system and warning system are sent in central controller, display unit, distance sensor unit, change, the operational factor of each parts of distance sensor unit senses cogeneration plant wherein, the measured value that change send transmission system that sensing is come is transformed to standard electric signal and uploads to central controller, central controller carries out computing to the parameter electric signal transmitting on these, full factory of Bing Dui cogeneration plant integrated environment evaluation index is made evaluation, judge that whether cogeneration plant's integrated environment evaluation index is up to standard, if cogeneration plant's integrated environment evaluation index exceeds predetermined value, to warning system, send alerting signal, warning horn triggers, and parts and anomaly parameter thereof show abnormality on display unit, wherein the calculating of central controller and logical process mainly comprise:
The first step: based on steam turbine internal power W i, steam turbine absolute internal efficiency η i, boiler thermal output η b, pipeline efficiency eta p, steam turbine mechanical efficiency η mwith efficiency of generator η g, calculate plant thermal efficiency η cp, wherein:
W i = Σ j = 1 z D j Δ h j + D c Δ h c
In formula: W ifor steam turbine internal power, KJ/h; D j, D cbe respectively the solidifying airshed of regenerative steam flows at different levels, exhaust condenser, kg/h; Δ h j, Δ h cbe respectively the stream that draws gas at different levels, the actual enthalpy drop of condensing stream in steam turbine, Kj/kg; Z is regenerative steam progression;
η i = W i Q 0
In formula: Q 0for the heat consumption of steam turbine, KJ/h;
η cp＝η bη pη iη mη g
In formula: η bfor boiler thermal output, η pfor pipeline efficiency, η mfor steam turbine mechanical efficiency, η gfor efficiency of generator;
Second step: calculate the full coal consumption amount B of factory based on plant thermal efficiency, and calculate the energy cost C of fuel according to stock coal price 1:
B = 3600 P e η cp Q net , ar
In formula: P efor the electric power of Turbo-generator Set, kW; Q net, arfor the net calorific value of cogeneration plant with coal, kJ/kg;
The 3rd step: the emission behaviour of flue dust, sulphuric dioxide and the oxides of nitrogen of on-line real time monitoring smoke evacuation tail gas, determine the major pollutants content of smoke evacuation tail gas, and by collecting standard, calculate charges for disposing pollutants C according to the content of these major pollutants and charges for disposing pollutants 2;
The 4th step: the integrated environment evaluation index D that determines cogeneration plant with following formula:
D = C 1 + C 2 P e ;
The 5th step: the environmental economy implementations of judgement cogeneration plant operation, when D value is greater than the first predetermined value, during judging that now cogeneration plant operates in and exceeds design and operation expense, the state in uneconomical and not environmental protection;
The 6th step: the operational factor that checks item by item the projects such as boiler, pipe network and pump, superheater or reheater, steam turbine, generator, condenser or heat interchanger, economizer, tail gas treatment device and tail gas, by tabling look-up, compare with design load or the historical reference value of corresponding parameter, if more than not exceeding the default percent value of design load or historical reference value in these operational factors, keep cogeneration plant normally to move; If existed in these parameters more than the operational parameter value of at least one exceeded the default percent value of design load or historical reference value, so the state of relevant parameter and associated components is shown in display unit and to alarm and sends alerting signal, remind staff to note the state of associated components.
The 7th step: after maintenance, system starts to enter next circulation from the first step again.
Scheme two:
According to the equipment of scheme 1 monitoring power supply integrated environment evaluation index, described integrated environment evaluation index D and the design load of each parameter or the default percent value of historical reference value can be adjusted setting according to the regulation of different regional laws and regulations, if what strictly above-mentioned numerical value can be arranged environmental requirement is lower, if the height that loosely above-mentioned numerical value can be arranged environmental requirement is a bit to reduce the sensitivity of system.
Scheme three:
According to the equipment of the monitoring power supply integrated environment evaluation index of scheme 1, before entering next circulation, in the storer of central controller, record maintenance parts accumulative total is overhauled one of parameter that number of times puts on record as alarm indication.
Scheme four:
According to the equipment of the monitoring power supply integrated environment evaluation index of scheme 1, maintenance wherein comprises the maintenance during on-bne repair and overhaul.
Scheme five
According to the equipment of the monitoring power supply integrated environment evaluation index of scheme 1, wherein can manually arrange the deviation range of environmental evaluation index D and the design load of each parameter or the default percent value of history value, be for example set to 10%, 15% etc.
In addition, at present, thermal power plant's exhaust emission is mainly imposed sulphuric dioxide (SO 2), oxides of nitrogen (NO x) and 3 charges for disposing pollutants of flue dust.Rush buck and pollute main suspension (SS), chemical oxygen demand (COD) (COD) and total 3 charges for disposing pollutants of arsenic imposed.Charges for disposing pollutants are used according to the kind discharging pollutants, quantity and are calculated and impose with pollutional equivalent; the < < collection of drainage dues standard and the computing method > > that according to The Ministry of Finance of the People's Republic of China, MOF and State Environmental Protection Administration, formulate carry out the calculating of pollutant expense, and the mode that every equivalents expenses standard of various pollutants arranges by parameter before can starting according to the system that is defined in of local law rules is inputted central controller.
The equivalents of pollution charges use=this pollutant of certain pollutant * every equivalents expenses standard.
Mainly consider in the present invention the equivalents of air pollution emission thing, also can include the major pollutants of water pollution in limit of consideration if necessary or if possible.
Accompanying drawing explanation
Fig. 1 is cogeneration plant's unit arrangement plan typically;
Tu2Shi cogeneration plant system cost state diagram;
Tu3Shi cogeneration plant actual motion expense is evaluated control system figure;
Tu4Shi cogeneration plant actual motion expense is evaluated and operation block scheme.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.At this, schematic description and description of the present invention is used for explaining the present invention, but not as a limitation of the invention.
The present embodiment is a kind of equipment of monitoring cogeneration plant's integrated environment evaluation index, it is pointed out that the present embodiment Shi Ba cogeneration plant integrated environment is as a kind of embodiment of the integrated environment of powering in the present invention.
Fig. 1 represents to comprise the cogeneration plant 1 of some steam turbine sections, and they are for different pressure design.These steam turbine sections are in series arranged on common axle 5.
In order to move, water produces steam in the interior heating of steam boiler 7 and by live steam superheater 9.Superheated vapor is introduced high-pressure turbine section 13 as working steam by pipeline, and steam expands there.After expanding in high-pressure turbine section 13, part steam is introduced intermediate superheater 15 by the first cross over pipe 14, reheats there, then introduces in double-flow middle-pressure steam turbine section 17.Steam here reexpands, until regulation, present lower stress level.
Then, expand into the steam of lower pressure levels in middle-pressure steam turbine section 17, by the second cross over pipe 21 connecting, introducing is in double-flow low-pressure turbine section 25 equally.
By public axle 5, drive the generator 29 of generation current.Expand and cooling after leave in the steam inflow condenser 31 of low-pressure turbine section 25, it condenses by heat is passed to surrounding environment there, and collects as liquid water.By condensate pump 33, water relay storage, in feed-tank 37, is then supplied with to steam boiler 7 by feed pump 39 and primary heater 35 again.Wherein primary heater 35 can be economizer, after the exhaust waste gas recycling flowing out and waste gas treatment equipment, from chimney 71, discharges through boiler.
After expansion stages, extraction steam pipe 41, after high-pressure turbine section 13 expansion stages, is exactly pressed flow technique before intermediate superheater 15, is connected with high-pressure turbine section 13.By this extraction steam pipe 41, being customer 49 extracts needed steam after expanding high-pressure turbine section 13 from system.
Extraction steam pipe 41 imports in expanders 43, expander thereby be connected with high-pressure turbine section 13.Expander 43 is designed to independent expansion of vapo(u)r turbine 44, the second generators 45 and is attached thereto.The steam extracting is inner at expansion of vapo(u)r turbine 44 is total system acting, and perfect condition expand into the level (pressure, temperature) of customer 49 expectations.Replace generator, also can arrange or connect applicable mechanical energy consumption device.
From expansion of vapo(u)r turbine 44, the factory steam expanding is further directly introduced to customer 49 through industrial steam pipe 47.It is for example designed to fuel treating equipment or is designed to flue gas processing device.Independent expansion of vapo(u)r turbine 44 is used in back pressure operation.In this case, at the final state point expanding, as far as possible directly corresponding to needed factory steam pressure, so expansion of vapo(u)r turbine 44 customer 49 that is desirably connection provides the pressure and temperature level of needs.
In addition, heat is reclaimed in the condensation that optionally heat supply of cogeneration plant not only comes from exhaust steam in steam turbine, also likely comes from steam turbine intergrade is drawn gas or directly draw from boiler steam and enters heat interchanger with to heat supply network heat supply.Only by exhaust steam condensation, come to heat supply network heat supply in the example depicted in fig. 1.
Tu2Shi cogeneration plant system cost state diagram.As can be seen from the figure the expense of Hazards in Power Plant input is mainly for the fuel of fuel cost and inputs 201 expenses and for the operating cost 202 of cogeneration plant's day-to-day operation, and the capital cost of output can be divided into that heat is exported 204 expenses, electric energy exports 205 expenses and 206 expenses are exported in blowdown.Certainly at this, said input and output are to consider from the angle of energy flow, and in fact, fuel input expense, operating cost, blowdown output expense all need outside defrayment to realize, and these projects are negative incomes, are cost-effectivenes expenditures; And heat is exported expense and electric energy output expense is that cogeneration plant takes in to the launch return property of mains supply and heat supply network heat supply gained, accrued for just taking in.
Tu3Shi cogeneration plant actual motion expense is evaluated control system schematic diagram.Central controller 303 receives from boiler 7, pipe network and pump, superheater 9, steam turbine 13, 17, 25, generator 29, condenser 31, economizer 35, tail gas treatment device 49, the sensor of tail gas etc. detects the parameter of gained to these parts, central controller is processed these parameters, and calculate the actual motion expense of cogeneration plant, then by actual motion expense and design and operation expense, compare, when the numerical value of actual motion expense higher than design and operation expense 5% time, the parameter of all parts is compared one by one and judged, find out poor efficiency or damage parts, and by corresponding component and corresponding parameter display on display unit 205, to warning horn 304, send alerting signal, warning horn is reported to the police, remind staff to carry out inspection and maintenance.
In addition, central controller is accepted the input of external stability parameter, such as design data parameter typing 301 with such as other of the data setting of ature of coal parameter etc., arranges 302.
Tu4Shi cogeneration plant actual motion expense is evaluated and operation block scheme, first In-put design parameter and system is carried out to initialization arrange 401 on central controller, then under the control of central controller, from the collection of each parts, read distal sensor measurement parameter 402: comprise coal-supplying amount, bed drain purge, deslagging temperature, boiler feed temperature, main steam enthalpy, reheated steam enthalpy, extraction temperature, extraction pressure, turbine discharge enthalpy, heat interchanger heat exchange amount, condenser heat exchange amount, each pipeline pressure and crushing, generator speed, generator power, exhaust temperature, tail gas humidity, tail gas is containing amount of sulfur dioxide, tail gas nitrogen-containing oxide amount, exhaust smoke dust quantity etc., after having gathered above-mentioned data, central controller calculates cogeneration plant's energy cost and cogeneration plant's environmental costs 403 based on data, calculate again cogeneration plant's actual motion expense 404, and according to the actual motion expense of cogeneration plant, calculate the integrated environment evaluation index of cogeneration plant, utilize actual integrated environment evaluation index to come comparison cogeneration plant actual motion expense and design and operation expense 405, in the 406th step, judge the departure degree of actual motion expense and design and operation expense, see whether actual motion expense is greater than 5% of design and operation expense, if actual motion expense is to be greater than 5% of design and operation expense, carry out the judgement of operation exception situation, in the 407th step, check the parameter of cogeneration plant's all parts, the parameter of described all parts is compared with corresponding design parameter, see whether actual parameter departs from design parameter more than 5%, in the 408th step, find out anomaly parameter, relevant parameter is shown in display unit and to alarm and sends alerting signal, in the 409th step, parts are overhauled or change extremely or damage in online or shutdown, otherwise keep cogeneration plant's operation.
Be understandable that, those skilled in the art can change setting to the departure degree of above-mentioned index, for example, can be 5%, can be also 10%, 15% etc., and these complete in arranging and can the initialization in step 401 arranging.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.

Claims (4)

1. an equipment of monitoring power supply integrated environment evaluation index, comprising: transmission system and warning system are sent in central controller, display unit, distance sensor unit, change, the operational factor of each parts of distance sensor unit senses cogeneration plant wherein, the measured value that change send transmission system that sensing is come is transformed to standard electric signal and uploads to central controller, central controller carries out computing to the parameter electric signal transmitting on these, full factory of Bing Dui cogeneration plant integrated environment evaluation index is made evaluation, judge that whether cogeneration plant's integrated environment evaluation index is up to standard, if cogeneration plant's integrated environment evaluation index exceeds predetermined value, to warning system, send alerting signal, warning horn triggers, and parts and anomaly parameter thereof show abnormality on display unit, wherein the calculating of central controller and logical process mainly comprise:
The first step: based on steam turbine internal power W i, steam turbine absolute internal efficiency η i, boiler thermal output η b, pipeline efficiency eta p, steam turbine mechanical efficiency η mwith efficiency of generator η g, calculate plant thermal efficiency η cp, wherein:
W i = &Sigma; j = 1 z D j &Delta; h j + D c &Delta; h c
In formula: W ifor steam turbine internal power, KJ/h; D j, D cbe respectively the solidifying airshed of regenerative steam flows at different levels, exhaust condenser, kg/h; Δ h j, Δ h cbe respectively the stream that draws gas at different levels, the actual enthalpy drop of condensing stream in steam turbine, Kj/kg; Z is regenerative steam progression;
&eta; i = W i Q 0
In formula: Q 0for the heat consumption of steam turbine, KJ/h;
η cp＝η bη pη iη mη g
In formula: η bfor boiler thermal output, η pfor pipeline efficiency, η mfor steam turbine mechanical efficiency, η gfor efficiency of generator;
Second step: calculate the full coal consumption amount B of factory based on plant thermal efficiency, and calculate the energy cost C of fuel according to stock coal price 1:
B = 3600 P e &eta; cp Q net , ar
In formula: P efor the electric power of Turbo-generator Set, kW; Q net, arfor the net calorific value of cogeneration plant with coal, kJ/kg;
The 3rd step: the emission behaviour of flue dust, sulphuric dioxide and the oxides of nitrogen of on-line real time monitoring smoke evacuation tail gas, determine the major pollutants content of smoke evacuation tail gas, and by collecting standard, calculate charges for disposing pollutants C according to the content of these major pollutants and charges for disposing pollutants 2;
The 4th step: the integrated environment evaluation index D that determines cogeneration plant with following formula:
D = C 1 + C 2 P e ;
The 5th step: the environmental economy implementations of judgement cogeneration plant operation, when D value is greater than the first predetermined value, during judging that now cogeneration plant operates in and exceeds design and operation expense, the state in uneconomical and not environmental protection;
The 6th step: the operational factor that checks item by item the projects such as boiler, pipe network and pump, superheater or reheater, steam turbine, generator, condenser or heat interchanger, economizer, tail gas treatment device and tail gas, by tabling look-up, compare with design load or the historical reference value of corresponding parameter, if more than not exceeding the default percent value of design load or historical reference value in these operational factors, keep cogeneration plant normally to move; If existed in these parameters more than the operational parameter value of at least one exceeded the default percent value of design load or historical reference value, so the state of relevant parameter and associated components is shown in display unit and to warning horn and sends alerting signal, remind staff to note the state of associated components;
The 7th step: after maintenance, system starts to enter next circulation from the first step again.
2. according to the equipment of claim 1 monitoring power supply integrated environment evaluation index, described integrated environment evaluation index D and the design load of each parameter or the default percent value of historical reference value can be adjusted setting according to the regulation of different regional laws and regulations, if what strictly above-mentioned numerical value can be arranged environmental requirement is lower, if the height that loosely above-mentioned numerical value can be arranged environmental requirement is a bit to reduce the sensitivity of system.
3. according to the equipment of the monitoring power supply integrated environment evaluation index of claim 1, before entering next circulation, in the storer of central controller, record maintenance parts accumulative total is overhauled one of parameter that number of times puts on record as alarm indication.
4. according to the equipment of the monitoring power supply integrated environment evaluation index of claim 1, maintenance wherein comprises the maintenance during on-bne repair and overhaul.
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WO2018027472A1 (en) * 2016-08-08 2018-02-15 吴鹏 Method and system for transmitting coal usage of boiler
CN107292523A (en) * 2017-06-27 2017-10-24 广州供电局有限公司 The evaluation method and system of fired power generating unit environmental-protecting performance
TWI784308B (en) * 2019-09-03 2022-11-21 日商Ｉｈｉ股份有限公司 Abnormality detecting device and display device
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