CN114239322A - Design and optimization method and system for flue gas water lifting system of coal-fired power plant - Google Patents
Design and optimization method and system for flue gas water lifting system of coal-fired power plant Download PDFInfo
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Abstract
The invention relates to a design and optimization method and a system for a coal-fired power station flue gas water-lifting system, which at least comprise the following steps: inputting external conditions, inputting various relevant data required by construction projects of the flue gas water lifting system, and forming an external condition data database; the subsystem is preliminarily designed, namely a condensing system, a circulating cooling system and a regulation and storage system are preliminarily designed; the cost is calculated, and the construction installation project amount, initial investment, overhaul expense and/or operation expense of each subsystem are calculated; and optimizing the system, namely comprehensively optimizing and adjusting the primary design scheme of each subsystem to obtain the optimized design scheme. The scheme of the invention integrates the functions of subsystem design, optimization, cost measurement and the like, can greatly improve the design efficiency and level of flue gas water lifting, provides an optimal design scheme, reduces water consumption and saves project investment.
Description
Technical Field
The invention belongs to the technical field of auxiliary systems of power station boilers, and particularly relates to a design and optimization method and system of a flue gas water lifting system of a coal-fired power station.
Background
China, the three North and other areas have abundant coal resources, but are also arid areas with extreme water shortage. At present, the coal-fired power plant in the water-deficient area generally adopts an air cooling technology to reduce water consumption, but the water consumption of other systems except a cooling system in the extremely water-deficient area is still larger (such as wet desulphurization), so that the method becomes an important factor for restricting the construction and the operation of the coal-fired power plant in the water-deficient area.
At present, the coal-fired power plant adopts a flue gas water-lifting technology after desulfurization, so that the external water consumption of the coal-fired power plant in a water-deficient area can be greatly reduced, and even zero water supplement of an external water source can be realized when the whole plant normally operates.
The smoke water-lifting technology mainly comprises a condensation method, a solution absorption method and a membrane method, wherein the condensation method is the mainstream technology applied in the industry at present, and the invention is also the improvement mainly aiming at the technology.
The condensation method flue gas water-lifting system generally comprises a condensation system, a circulating cooling system and a regulation and storage system. The condensing system is a system which condenses water vapor in the flue gas into water and collects the condensed water by reducing the temperature of the flue gas; the circulating cooling system is a system which transfers heat released by water vapor condensation and flue gas cooling in the flue gas to the external environment in a water circulation mode; the storage regulating system is a system for regulating balance between water lifting amount and water consumption amount through facilities such as a water pool or a water tank (tank). The condensation method is divided into two technical routes of flue gas contact type and flue gas indirect type according to a flue gas condensation heat exchange mode. The design of the flue gas water-lifting system is different for different flue gas condensation heat exchange modes.
There are two important parameters in the design of the flue gas water-lifting system by the condensation method: water lifting scale and storage regulation capacity. The scale of water extraction, also called water extraction amount and condensed water amount, is the mass flow of the condensed water obtained in the condensing system, and directly affects the cost of the condensing system and the circulating cooling system. The storage capacity determines the cost of the storage system. The water lifting scale is large, and the storage capacity can be small; the water lifting scale is small, and the storage capacity needs to be large. Different circulating cooling water parameters determine the cost of the condensing system and the circulating cooling system under the determined water lifting scale. There is a matching relationship between the condensing system, the hydronic system and the storage system to achieve the external water consumption requirement in the most economical case. However, a systematic method for designing and optimizing a flue gas water lifting system of a coal-fired power plant does not exist at present.
The existing design method for extracting water from flue gas comprises the following steps: 1. determining the scale of water lifting; 2. determining the regulation and storage capacity according to the meteorological conditions and the external water consumption requirement; 3. selecting the quantity and temperature rise of circulating water; 4. designing a condensing system and selecting equipment; 5. designing a circulating cooling system and selecting equipment types; 6. designing a storage regulating system and selecting equipment types; 7. arranging a system; 8. and (5) counting the material quantity. The steps of the method are relatively independent, no design system which is mutually related is formed, and no overall optimization process exists, so that an optimal technical scheme cannot be provided, the cost of engineering quantity, materials and the like is high, and the working effect of the flue gas water lifting system is poor.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a design and optimization method for a flue gas water-lifting system of a coal-fired power plant. The scheme of the invention breaks through the conventional design technology, and can optimize the flue gas water lifting system aiming at the conditions of unit load, flue gas parameters, meteorological conditions, external water consumption and the like by planning the optimization idea, so as to provide the optimal system design scheme, thereby reducing the water consumption and a series of costs of construction, operation, maintenance and the like of the flue gas water lifting system.
According to the technical scheme, the invention provides a design and optimization method of a coal-fired power plant flue gas water lifting system, wherein the flue gas water lifting system at least comprises three subsystems, namely a condensation system, a circulating cooling system and a regulation and storage system, and at least comprises the following steps:
s1, inputting external conditions, inputting various data related to the construction project requirements of the flue gas water lifting system, and forming an external condition data database;
step S2, performing subsystem preliminary design, and performing preliminary design on the condensing system, the circulating cooling system and the regulating and storing system based on the data database obtained in the step S1;
step S3, cost calculation, namely calculating the construction installation project amount, initial investment, overhaul cost and/or operation cost of each subsystem based on the data obtained in the step S1 and the step S2;
and S4, optimizing the system, and comprehensively optimizing and adjusting the preliminary design scheme of each subsystem based on the data obtained in the steps S1 to S3 to obtain the optimized design scheme.
Further, the data inputted in step S1 includes at least one of meteorological data, load data, flue gas data and component data; the meteorological data comprises at least one of air temperature, relative humidity, atmospheric pressure and monthly average wind speed; the load data comprises at least one of the annual average load rate of the unit and the summer average load rate of the unit; the flue gas data comprises at least one of flue gas amount, flue gas temperature and the content of each component of the flue gas; the part data includes at least one of part input parameters and part material.
Further, step S2 includes a condensing system flow design, a circulation cooling system design and a storage system design; the design of the condensing system comprises at least one of flow design of the condensing system, equipment model selection of the condensing system, pipeline design of the condensing system, anticorrosion design of the condensing system and design of an alkali adding system, and preliminary arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the size of the selected equipment and the pipeline; the flow design of the condensation system at least comprises that a contact condensation system flow or an indirect condensation system flow is selected according to the condensation process; the equipment in the selected type of the condensing system equipment comprises at least one of a water receiving tank, a heat exchanger and a flushing water pump; the type selection of the condensing system equipment and the pipeline design of the condensing system are carried out according to the selected flow of the condensing system and the flue gas data, the water lifting scale and the circulating water parameters corresponding to the average load factor of the unit in summer.
Further, the design of the circulating cooling system comprises at least one of the process design of the circulating cooling system, the equipment type selection of the circulating cooling system, the pipeline design of the circulating cooling system and the anticorrosion design of the circulating cooling system, and the preliminary arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the size of the selected equipment and the pipeline; the flow of the circulating cooling system is designed to be selected according to the condensation process; the equipment in the type selection of the circulating cooling system equipment comprises first equipment and second equipment, wherein the first equipment at least comprises a cooling tower radiator and a fan, and the second equipment comprises at least one of a circulating water pump, a water filling pump, a water supplementing pump, an expansion water tank and a pressure stabilizing pump; the type selection of the first equipment is carried out according to circulating water parameters and meteorological data corresponding to the average load rate of the unit in summer; the type selection of the second type of equipment, the pipeline design of the circulating cooling system and the anticorrosion design of the circulating cooling system are carried out according to the arrangement positions of the condensing tower or the heat exchanger.
Further, the design of the storage regulating system comprises at least one of flow design of the storage regulating system, design of a storage regulating container, selection of a water supply pump, design of a pipeline of the storage regulating system and anticorrosion design of the storage regulating system, and preliminary arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the selected size of the equipment and the pipeline; the flow design of the storage regulating system at least comprises that corresponding water lifting scale is calculated according to the configuration of the condensing system and the circulating cooling system and meteorological data corresponding to respective natural time; the design of the storage container at least comprises the steps of determining the volume of a required storage system according to the requirement of a target on the external water consumption index; the water supply pump model selection, the storage and regulation system pipeline design and the storage and regulation system anticorrosion design are all carried out according to the unit water consumption.
Further, step S3 includes calculating the construction installation work volume of each subsystem according to the material volume statistics of the condensing system, the circulating cooling system and the storage system; calculating initial investment and overhaul cost of each subsystem through material quantity statistics, building installation engineering quantity and corresponding unit price cost; the operation cost of the flue gas water-lifting system comprises the operation electricity cost and the operation water cost of each subsystem and the alkali adding cost of the alkali adding system.
Further, step S4 includes adjusting the water lift scale and the circulating water amount and the circulating water temperature in the circulating cooling system according to the initial investment, the overhaul cost and the operation cost calculated in step S3 and the most economic principle of the annual cost converted from the initial investment, the overhaul cost and the operation cost, and determining the system flow, the system configuration and the system layout of each final flue gas water lift subsystem.
Preferably, step S5 is further included after step S4; step S5 is outputting, according to the design obtained in step S4, the required parameters and/or charts according to the given format requirements.
The invention also provides a design and optimization system of the coal-fired power plant flue gas water lifting system, which at least comprises an external condition input module, a condensation system module, a circulating cooling system module, a storage regulation system module, a cost measurement module and a system optimization module; the external condition input module is respectively connected with the condensing system module, the circulating cooling system module and the storage regulating system module, the condensing system module, the circulating cooling system module and the storage regulating system module are respectively connected with the cost measuring and calculating module, and the cost measuring and calculating module is connected with the system optimizing module.
Preferably, the system further comprises an output module, the output module is connected with the system optimization module, and the output module comprises a chart generation unit.
Compared with the prior art, the design and optimization method and the system for the coal-fired power station flue gas water lifting system have the beneficial technical effects that:
1. the scheme of the invention integrates the functions of flue gas water lifting system design, equipment type selection, cost measurement, material quantity statistics and the like, and can be directly used for the design project of the flue gas water lifting system.
2. The scheme of the invention automatically outputs the most economical and reasonable flow and equipment configuration of each subsystem of the flue gas water lifting system through cost optimization according to the load data, the flue gas data, the meteorological data and other parameter data of the unit and by combining with the external water consumption index.
3. The scheme of the invention can be combined with field conditions, and a system preliminary arrangement scheme is provided according to the determined system design and equipment configuration.
4. The scheme of the invention can automatically output the optimized system flow chart, equipment parameters, preliminary arrangement chart, equipment inventory and material quantity statistical table, cost measurement table and the like according to the specific format requirement.
5. The scheme of the invention scientifically optimizes the flue gas water-lifting system of the coal-fired power plant, greatly improves the design efficiency, effectively improves the design level, saves project investment, and can reduce the water consumption to the maximum extent.
Drawings
FIG. 1 is a schematic process flow diagram of a preferred embodiment of the present invention.
Fig. 2 is a schematic system structure diagram of another preferred embodiment of the present invention.
Detailed Description
As is well known in the art, the flue gas water-lifting system at least comprises three subsystems, namely a condensing system, a circulating cooling system and a storage system, wherein specific components and principles thereof are the prior art, and the types, parameter selection, position arrangement and the like of the used components need to be designed according to actual conditions. The invention aims to provide a systematic method for designing and optimizing a flue gas water lifting system by adopting an overall optimization mode, so that the flue gas water lifting system can be optimized according to the conditions such as unit load, flue gas parameters, meteorological conditions, external water consumption and the like to obtain an optimal design scheme of the flue gas water lifting system, and a corresponding system design scheme, main equipment model selection parameters and the like are provided.
Referring to fig. 1, the method for designing and optimizing the flue gas water extraction system of the coal-fired power plant of the present invention at least comprises the following steps:
s1, inputting external conditions, inputting various data related to the construction project requirements of the flue gas water lifting system, and forming an external condition data database;
step S2, performing subsystem preliminary design, and performing preliminary design on the condensing system, the circulating cooling system and the regulating and storing system based on the data database obtained in the step S1;
step S3, cost calculation, namely calculating the construction installation project amount, initial investment, overhaul cost and/or operation cost of each subsystem based on the data obtained in the step S1 and the step S2;
and S4, optimizing the system, and comprehensively optimizing and adjusting the preliminary design scheme of each subsystem based on the data obtained in the steps S1 to S3 to obtain the optimized design scheme.
According to some embodiments, the data input in step S1 includes meteorological data, load data, flue gas data, and component data. Wherein, the meteorological data mainly comprises air temperature, relative humidity, atmospheric pressure, monthly average wind speed and the like; the load data mainly comprises the annual average load rate of the unit, the summer average load rate of the unit and the like; the flue gas data mainly comprises flue gas amount, flue gas temperature, the content of each component of the flue gas and the like; the component data mainly includes input parameters of each component and material selection of each component.
Step S2 includes a condensing system design, a circulation cooling system design, and a storage system design. The three processes may be performed in any order, for example, simultaneously or sequentially.
The design of the condensing system comprises the process design of the condensing system, the equipment model selection of the condensing system, the pipeline design of the condensing system, the anticorrosion design of the condensing system and the design of an alkali adding system, and the preliminary arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the size of the selected equipment and the pipeline. The design of the condensing system flow comprises that a contact condensing system flow or an indirect condensing system flow is selected according to a condensing process; the equipment in the type selection of the condensation system equipment comprises a condensation tower, internal parts, a water receiving tank, a heat exchanger, a flushing water pump and the like; the type selection of the condensing system equipment and the pipeline design of the condensing system are carried out according to the selected flow of the condensing system and the flue gas data, the water lifting scale and the circulating water parameters corresponding to the average load factor of the unit in summer. For example, when a contact (also called hybrid) condensation process is adopted, a contact condensation system flow is adopted as the condensation system flow, and a contact heat exchanger is adopted as the heat exchanger; when the indirect condensation process is adopted, the indirect condensation system flow is selected as the condensation system flow, and the indirect heat exchanger is selected as the heat exchanger.
The design of the circulating cooling system comprises the process design of the circulating cooling system, the equipment type selection of the circulating cooling system, the pipeline design of the circulating cooling system and the anticorrosion design of the circulating cooling system, and the preliminary arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the selected equipment and pipeline sizes. Wherein, the flow design of the circulating cooling system is selected according to the condensation process; the equipment in the selection of the circulating cooling system equipment comprises first equipment and second equipment, wherein the first equipment comprises a cooling tower radiator, a fan and the like, and the second equipment comprises circulating water pumps, water filling pumps, water supplementing pumps, expansion water tanks (or pressure stabilizing pumps) and other system equipment. The type selection of the first equipment is carried out according to circulating water parameters and meteorological data corresponding to the average load rate of the unit in summer; the type selection of the second type of equipment, the pipeline design of the circulating cooling system and the anticorrosion design of the circulating cooling system are carried out according to the arrangement positions of the condensing tower or the heat exchanger. Wherein optionally the cooling tower is in the form of air cooling. Optionally, the circulating water pump takes the form of a centrifugal pump.
The design of the regulation system comprises the flow design of the regulation system, the design of a regulation container, the selection of a water supply pump, the pipeline design of the regulation system and the anticorrosion design of the regulation system, and the initial arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the size of the selected equipment and the pipeline. Wherein, the flow design of the storage regulating system comprises that according to the configuration of the condensing system and the circulating cooling system and meteorological data corresponding to respective natural time, the corresponding water lifting scale (water lifting amount) is calculated; the design of the storage container comprises the steps of determining the volume of a required storage system according to the requirement of a target on an external water consumption index; optionally, the storage container takes the form of a pool, a tank or a tank; the water supply pump model selection, the storage and regulation system pipeline design and the storage and regulation system anticorrosion design are all carried out according to the unit water consumption.
Step S3 includes calculating the construction installation project quantity of each subsystem according to the material quantity statistics of the condensing system, the circulating cooling system and the regulating and storing system; and calculating initial investment and overhaul cost of each subsystem through material quantity statistics, building installation engineering quantity and corresponding unit price cost. The method also comprises the step of calculating the operation cost of the system, wherein the operation cost of each subsystem comprises the operation electricity cost and the operation water cost, and the condensation system also comprises the alkali adding cost. Specifically, the running electricity charge of each subsystem is calculated through the electricity consumption and the electricity price of each subsystem; calculating the running water charge of each subsystem through the external water consumption index and the water price; and calculating the alkali adding cost of the condensation system according to the alkali consumption of the alkali adding system and the unit price of alkali. Optionally, the raw material of the alkali adding system adopts NaOH or Na2CO3。
Step S4 includes, according to the initial investment, the overhaul cost and the operation cost calculated in step S3, adjusting the scale of water lift and the amount of circulating water and the temperature of circulating water in the circulating cooling system according to the most economic principle of the annual cost converted from the initial investment, the overhaul cost and the operation cost, and determining the system flow, the system configuration and the system layout of each final flue gas water lift subsystem. It is to be understood that the system configuration includes at least the device selection (parameters, specifications, and the like of each device), the pipe design (parameters, specifications, and the like of each pipe), the corrosion prevention design, and the like of each subsystem involved in step S2, and the system is arranged as a design plan of the positional relationship between each device and pipe provided in each subsystem. The basic principle of the optimization implemented in step S4 is, for example, that a large number of parameters to be determined by design are involved in step S2, the parameters are set as variables, and by changing the values of the parameters, the results of step S2 and step S3 change accordingly, and finally the condition that the annual cost discounted in step S3 is the lowest is obtained, and at this time, the corresponding parameters are the optimal solution. It will be appreciated that this process is capable of being implemented based on the prior art, for example by computer algorithms.
Preferably, as shown in fig. 1, step S5 is further included after step S4; step S5 is to output, according to the design scheme obtained in step S4, the required parameters and/or charts are automatically output according to the given format requirements. According to some embodiments, the output content of step S5 includes a flow chart of the flue gas water extraction system, a selection parameter of each subsystem device, a system preliminary arrangement chart, a device inventory and material volume statistical table, a construction installation work volume statistical table, and a cost calculation table.
The invention also provides a design and optimization system of the coal-fired power plant flue gas water extraction system based on the method, please refer to fig. 2, which comprises an external condition input module 1, a condensing system module 2, a circulating cooling system module 3, a storage regulation system module 4, a cost measurement module 5 and a system optimization module 6. The design and optimization system is, for example, a computer system formed by electrical connections so as to perform signal and data transmission and the like between the respective modules. The external condition input module 1 is respectively connected with the condensing system module 2, the circulating cooling system module 3 and the storage regulating system module 4, the condensing system module 2, the circulating cooling system module 3 and the storage regulating system module 4 are respectively connected with the cost measuring and calculating module 5, and the cost measuring and calculating module 5 is connected with the system optimizing module 6.
In one embodiment, the external condition input module 1 includes a data input unit and an external condition data database connected to each other. The external condition data database is formed or perfected by inputting various data related to the construction project requirements of the flue gas water pumping system into the data input unit. Specifically, for example, the input data includes meteorological data, load data, flue gas data, and component data.
The condensing system module 2, the circulating cooling system module 3 and the regulating and storing system module 4 respectively and correspondingly primarily design the condensing system, the circulating cooling system and the regulating and storing system in the flue gas water lifting system based on the obtained external condition data database. The three processes may be performed in any order, for example, the three processes are performed simultaneously or sequentially; the three modules can be designed basically independently, but there are some relations, for example, the equipment selection in the circulation cooling system module 3 is preferably carried out according to the equipment arrangement in the condensation system, so in the preferred embodiment, the condensation system module 2, the circulation cooling system module 3 and the storage system module 4 are connected in pairs, and the relation and matching relation of the details are fully considered in the design, so that better results can be obtained.
The condensing system module 2 specifically comprises a condensing system process design unit, a condensing system equipment model selection unit, a condensing system pipeline design unit, a condensing system anticorrosion design unit, an alkali addition system design unit, a condensing system preliminary arrangement unit and a material quantity statistical unit which are connected with the condensing system process design unit. The condensing system flow design unit is used for selecting a contact condensing system flow or an indirect condensing system flow according to a condensing process; in the type selection unit of the condensing system equipment, the corresponding equipment comprises a condensing tower, internal parts, a water receiving tank, a heat exchanger, a flushing water pump and the like; the working processes of the condensing system equipment model selection unit and the condensing system pipeline design unit are carried out according to the selected condensing system flow, and flue gas data, water lifting scale and circulating water parameters corresponding to the average load factor of the unit in summer (corresponding data are called from an external condition data database and are analyzed and processed).
The circulating cooling system module 3 comprises a circulating cooling system flow design unit, a circulating cooling system equipment model selection unit, a circulating cooling system pipeline design unit, a circulating cooling system anticorrosion design unit, a circulating cooling system preliminary arrangement unit and a material quantity statistical unit, wherein the circulating cooling system equipment model selection unit, the circulating cooling system pipeline design unit and the circulating cooling system anticorrosion design unit are connected with the circulating cooling system flow design unit. The work of the circulating cooling system flow design unit is selected according to a condensation process; the corresponding equipment in the model selection unit of the circulating cooling system equipment comprises first equipment and second equipment, wherein the first equipment comprises a cooling tower radiator, a fan and the like, and the second equipment comprises circulating water pumps, water filling pumps, water supplementing pumps, expansion water tanks (or pressure stabilizing pumps) and other system equipment. The type selection of the first equipment is carried out according to circulating water parameters and meteorological data corresponding to the average load rate of the unit in summer; the type selection work of the second type of equipment, and the work of the circulating cooling system pipeline design unit and the circulating cooling system anticorrosion design unit are carried out according to the arrangement positions of a condensing tower or a heat exchanger in the condensing system.
The regulation system module 4 comprises a regulation system process design unit, a regulation container design unit, a water supply pump type selection unit, a regulation system pipeline design unit, a regulation system anticorrosion design unit, a regulation system preliminary arrangement unit and a material quantity statistical unit, wherein the regulation container design unit, the water supply pump type selection unit, the regulation system pipeline design unit and the regulation system anticorrosion design unit are connected with the regulation system process design unit. The working of the regulating and storing system flow design unit comprises calculating corresponding water lifting scale (water lifting amount) according to the configuration of the condensing system and the circulating cooling system and meteorological data corresponding to respective natural time; the working of the regulating and storing container design unit comprises the steps of determining the volume of a required regulating and storing system according to the requirement of a target on the external water consumption index; the work of the water supply pump model selection unit, the regulating and storing system pipeline design unit and the regulating and storing system anticorrosion design unit is carried out according to the unit water consumption.
The cost measuring and calculating module 5 comprises a building installation project amount measuring and calculating unit, an initial investment measuring and calculating unit, a major repair expense measuring and calculating unit and an operation expense measuring and calculating unit. Furthermore, the operation fee calculating unit comprises an operation electric fee calculating unit, an operation water fee calculating unit and an alkali charging fee calculating unit. The specific working process of the cost measuring and calculating module 5 is to measure and calculate the building installation project amount of each subsystem according to the material amount statistics of the condensing system, the circulating cooling system and the storage regulating system; and calculating initial investment and overhaul cost of each subsystem through material quantity statistics, building installation engineering quantity and corresponding unit price cost. The operation cost of each subsystem comprises operation electricity cost and operation water cost, and the condensation system also comprises alkali adding cost. Calculating the running electricity charge of each subsystem according to the electricity consumption and the electricity price of each subsystem; calculating the running water charge of each subsystem through the external water consumption index and the water price; and calculating the alkali adding cost of the condensation system according to the alkali consumption of the alkali adding system and the unit price of alkali.
The system optimization module 6 includes a cost reduction unit, an optimization adjustment unit, a system final arrangement unit, and a final material amount statistical unit. The cost conversion unit calculates the annual cost converted from the initial investment, the overhaul cost and the operation cost according to the initial investment, the overhaul cost and the operation cost calculated by the cost measuring and calculating module 5; the optimization adjusting unit adjusts the water lifting scale, the circulating water quantity and the circulating water temperature in the circulating cooling system and the like according to the most economic principle; the system final arrangement unit determines the system flow, the system configuration and the system arrangement of each final flue gas water lifting subsystem; the final material amount statistic unit calculates a required material amount corresponding to the final design solution. It will be appreciated that the system module is implementable based on the prior art, for example, by a computer algorithm, and the description corresponding to the aforementioned step S4.
Preferably, as shown in fig. 2, the system further includes an output module 7, the output module 7 is connected to the system optimization module 6, the output module 7 includes a chart generation unit, and the required parameters and/or charts are automatically output according to the design scheme obtained by the system optimization module 6 and the given format requirement. According to some embodiments, the output content of the output module 7 includes a flow chart of the flue gas water extraction system, equipment type selection parameters of each subsystem, a system preliminary arrangement chart, an equipment inventory and material volume statistical table, a building installation engineering volume statistical table, and a cost measurement table. Therefore, the processing process of the list chart is integrated in the system, manual operation or other software systems and the like are not needed to be carried out independently, and the system is more convenient and efficient.
The design and optimization method and the system of the flue gas water lifting system of the coal-fired power plant break through the conventional design technology, optimize the flue gas water lifting system aiming at the conditions of unit load, flue gas parameters, meteorological conditions, external water consumption and the like by comprehensively planning the optimization thought, and automatically output the most economical and reasonable subsystem flows and equipment configuration of the flue gas water lifting system; and can combine the site condition, according to system design and apparatus configuration confirmed, propose the system and arrange the scheme preliminarily; and the design of the flue gas water lifting system, equipment type selection, cost measurement, material quantity statistics and other functions are integrated, and the method can be directly used for the design project of the flue gas water lifting system.
In conclusion, the scheme of the invention scientifically optimizes the flue gas water-lifting system of the coal-fired power station, greatly improves the design efficiency, effectively improves the design level, saves the project investment, and can furthest reduce a series of costs of water consumption, construction, operation, maintenance and the like of the flue gas water-lifting system.
It should be noted that the specific design method and system of each subsystem can be implemented by, for example, conventional technologies (software, hardware, or firmware, etc.) in the field of computers and conventional technologies in the field of coal-fired power plants, and therefore, the detailed description thereof is omitted here. And, for example, the steps of the method, the inputted parameter data, the selected specific equipment, etc. can be increased, decreased or modified according to the requirements, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention.
Claims (10)
1. A design and optimization method for a flue gas water-lifting system of a coal-fired power plant is characterized by at least comprising three subsystems, namely a condensing system, a circulating cooling system and a storage regulating system, and at least comprising the following steps:
s1, inputting external conditions, inputting various data related to the construction project requirements of the flue gas water lifting system, and forming an external condition data database;
step S2, performing subsystem preliminary design, and performing preliminary design on the condensing system, the circulating cooling system and the regulating and storing system based on the data database obtained in the step S1;
step S3, cost calculation, namely calculating the construction installation project amount, initial investment, overhaul cost and/or operation cost of each subsystem based on the data obtained in the step S1 and the step S2;
and S4, optimizing the system, and comprehensively optimizing and adjusting the preliminary design scheme of each subsystem based on the data obtained in the steps S1 to S3 to obtain the optimized design scheme.
2. The method of claim 1, wherein the data inputted in step S1 includes at least one of meteorological data, load data, flue gas data, and component data;
the meteorological data comprises at least one of air temperature, relative humidity, atmospheric pressure and monthly average wind speed;
the load data comprises at least one of the annual average load rate of the unit and the summer average load rate of the unit;
the flue gas data comprises at least one of flue gas amount, flue gas temperature and the content of each component of the flue gas;
the part data includes at least one of part input parameters and part material.
3. The design and optimization method of the coal-fired power plant flue gas water lifting system according to claim 2, wherein the step S2 includes a condensing system flow design, a circulating cooling system design and a storage regulation system design;
the design of the condensing system comprises at least one of flow design of the condensing system, equipment model selection of the condensing system, pipeline design of the condensing system, anticorrosion design of the condensing system and design of an alkali adding system, and preliminary arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the size of the selected equipment and the pipeline;
the flow design of the condensation system at least comprises that a contact condensation system flow or an indirect condensation system flow is selected according to the condensation process;
the equipment in the selected type of the condensing system equipment comprises at least one of a water receiving tank, a heat exchanger and a flushing water pump;
the type selection of the condensing system equipment and the pipeline design of the condensing system are carried out according to the selected flow of the condensing system and the flue gas data, the water lifting scale and the circulating water parameters corresponding to the average load factor of the unit in summer.
4. The design and optimization method of the coal-fired power plant flue gas water lifting system according to claim 3, characterized in that the design of the circulating cooling system comprises at least one of the processes design of the circulating cooling system, the equipment type selection of the circulating cooling system, the pipeline design of the circulating cooling system and the anticorrosion design of the circulating cooling system, and the preliminary arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the selected equipment and pipeline size;
the flow of the circulating cooling system is designed to be selected according to the condensation process;
the equipment in the type selection of the circulating cooling system equipment comprises first equipment and second equipment, wherein the first equipment at least comprises a cooling tower radiator and a fan, and the second equipment comprises at least one of a circulating water pump, a water filling pump, a water supplementing pump, an expansion water tank and a pressure stabilizing pump;
the type selection of the first equipment is carried out according to circulating water parameters and meteorological data corresponding to the average load rate of the unit in summer;
the type selection of the second type of equipment, the pipeline design of the circulating cooling system and the anticorrosion design of the circulating cooling system are carried out according to the arrangement positions of the condensing tower or the heat exchanger.
5. The design and optimization method of the coal-fired power plant flue gas water lifting system according to claim 4, characterized in that the design of the storage regulating system comprises at least one of the flow design of the storage regulating system, the design of a storage regulating container, the selection of a water supply pump, the design of a storage regulating system pipeline and the anti-corrosion design of the storage regulating system, and the preliminary arrangement and material quantity statistics of the equipment and the pipeline are carried out according to the selected equipment and pipeline size;
the flow design of the storage regulating system at least comprises that corresponding water lifting scale is calculated according to the configuration of the condensing system and the circulating cooling system and meteorological data corresponding to respective natural time;
the design of the storage container at least comprises the steps of determining the volume of a required storage system according to the requirement of a target on the external water consumption index;
the water supply pump model selection, the storage and regulation system pipeline design and the storage and regulation system anticorrosion design are all carried out according to the unit water consumption.
6. The method of claim 5, wherein step S3 includes,
calculating the quantity of building installation projects of each subsystem according to the material quantity statistics of the condensing system, the circulating cooling system and the storage and regulation system; and the number of the first and second groups,
calculating the initial investment and major repair cost of each subsystem through material quantity statistics, building installation engineering quantity and corresponding unit price cost;
the operation cost of the flue gas water-lifting system comprises the operation electricity cost and the operation water cost of each subsystem and the alkali adding cost of the alkali adding system.
7. The method for designing and optimizing the flue gas water lifting system of the coal-fired power plant as claimed in claim 6, wherein the step S4 includes adjusting the water lifting scale and the circulating water amount and the circulating water temperature in the circulating cooling system according to the most economic principle of the annual cost converted from the initial investment, the overhaul cost and the operation cost according to the initial investment, the overhaul cost and the operation cost calculated in the step S3, and determining the system flow, the system configuration and the system arrangement of each subsystem of the final flue gas water lifting.
8. The method for designing and optimizing the flue gas water-lifting system of the coal-fired power plant as claimed in claim 7, wherein the method further comprises a step S5 after the step S4; step S5 is outputting, according to the design obtained in step S4, the required parameters and/or charts according to the given format requirements.
9. A design and optimization system for a flue gas water lifting system of a coal-fired power plant is characterized by at least comprising an external condition input module, a condensing system module, a circulating cooling system module, a storage regulation system module, a cost measurement module and a system optimization module;
the external condition input module is respectively connected with the condensing system module, the circulating cooling system module and the storage regulating system module, the condensing system module, the circulating cooling system module and the storage regulating system module are respectively connected with the cost measuring and calculating module, and the cost measuring and calculating module is connected with the system optimizing module.
10. The system for designing and optimizing the flue gas water lifting system of the coal-fired power plant as recited in claim 9, further comprising an output module, wherein the output module is connected with the system optimization module, and the output module comprises a chart generation unit.
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