Equipment optimization method, device and equipment for dead steam waste heat heating system

Abstract

The invention provides an equipment optimization method, device and equipment for a dead steam waste heat heating system. The method comprises the following steps: acquiring a heating basic index of a target area to which a target dead steam waste heat heating system belongs; according to the heating basic indexes, system basic parameters of the target dead steam waste heat heating system are determined; according to the system operation parameters of the front condenser and the turbine low-pressure cylinder, the steam increasing machine optimization factors and the system basic parameters, the equipment type selection scheme of the front condenser, the steam increasing machine, the steam increasing machine condenser and the heating network heater is determined; adjusting the steam increasing machine optimization factor to obtain a plurality of selectable equipment type selection schemes of a front condenser, a steam increasing machine, a steam increasing machine condenser and a heat supply network heater; and according to the steam increasing machine optimization factor, determining a target equipment type selection scheme in a plurality of selectable equipment type selection schemes. According to the scheme, the design and equipment type selection of the dead steam waste heat heating system can be optimized, and the heat efficiency of the unit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and in particular to an equipment optimization method, device and equipment for an exhaust steam waste heat heating system. Background Art

[0002] According to its technical characteristics, about 60% of the heat supplied by the combustion of non-renewable energy fuels such as coal and oil is discharged into the natural environment through the loss of cold source of the exhaust steam condensation cycle of the low-pressure cylinder of the steam turbine, resulting in serious waste of non-renewable energy fuels and pollutant emissions. Therefore, the conventional extraction steam heating has a very low thermal efficiency.

[0003] In order to improve the heating efficiency of the unit and increase energy utilization, the use of waste heat heating system from thermal power generators, that is, recycling the heat loss from the originally wasted cold source as the main heat source for urban centralized heating, has become one of the main heating solutions.

[0004] However, as the exhaust steam waste heat heating system becomes more and more complex, the system design and equipment selection are difficult, and it is difficult to achieve global optimization through the coordinated operation of various equipment in the system. At present, the design and equipment selection of the exhaust steam waste heat heating system are implemented according to the requirements of engineering construction specifications and construction experience, and there is no optimization design method that can be directly used. Therefore, it is impossible to optimize the system and equipment during the project construction period to save construction costs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an equipment optimization method, device and equipment for an exhaust steam waste heat heating system, which can optimize the design and equipment selection of the exhaust steam waste heat heating system and improve the thermal efficiency of the unit.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0007] An equipment optimization method for a waste steam waste heat heating system is applied to a target waste steam waste heat heating system, wherein the target waste steam waste heat heating system is a three-stage heating system for heating circulating water in a city heating network through a pre-condenser, a steam booster and a steam booster condenser, and a heating network heater, comprising:

[0008] Obtain the basic heating indicators of the target area to which the target exhaust steam waste heat heating system belongs;

[0009] According to the basic heating index, the basic system parameters of the target exhaust steam waste heat heating system are determined; the basic system parameters include the circulating water volume of the heating network and the total power of the target exhaust steam waste heat heating system;

[0010] Obtain system operating parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the optimization factors of the steam booster;

[0011] Based on the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the steam booster optimization factor, and the system basic parameters, determine the equipment selection schemes for the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater;

[0012] Adjust the steam booster optimization factor to obtain multiple optional equipment selection schemes for the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater;

[0013] Based on the steam booster optimization factor, determine the target equipment selection scheme among multiple optional equipment selection schemes.

[0014] Optionally, based on the heating basic index, determine the system basic parameters of the target waste steam heat supply system, including:

[0015] Based on the heating basic index, determine the heating heat load of the target waste steam heat supply system;

[0016] Obtain the temperature difference between the supply and return water of the heat network of the target waste steam heat supply system under the climate environment of the target area;

[0017] Based on the heating heat load and the temperature difference between the supply and return water of the heat network, determine the system basic parameters of the target waste steam heat supply system.

[0018] Optionally, based on the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the steam booster optimization factor, and the system basic parameters, determine the equipment selection schemes for the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater, including:

[0019] Based on the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, and the system basic parameters, determine the equipment selection scheme for the pre-condenser; the equipment selection scheme for the pre-condenser includes the waste steam consumption of the pre-condenser and the equipment selection power of the pre-condenser;

[0020] Based on the steam booster optimization factor, determine the initial equipment selection scheme for the steam booster and the steam booster condenser; the initial equipment selection scheme for the steam booster and the steam booster condenser includes: the back pressure of the steam booster condenser, the consumption of the mixed steam at the outlet of the steam booster, the waste steam consumption in the mixed steam of the steam booster condenser, and the power steam consumption after the spray desuperheating of the steam booster;

[0021] Determine the unutilized waste steam volume in the initial equipment selection scheme for the steam booster and the steam booster condenser;

[0022] Based on the unutilized waste steam volume, correct the initial equipment selection scheme to obtain the equipment selection schemes for the steam booster and the steam booster condenser;

[0023] Based on the equipment selection scheme of the pre-condenser, the equipment selection schemes of the steam booster and the steam booster condenser, the equipment selection scheme of the heat network heater is obtained.

[0024] Optionally, according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the basic system parameters, determine the equipment selection scheme of the pre-condenser, including:

[0025] According to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the basic system parameters, determine the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser; the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine include: the outlet temperature of the circulating water of the pre-condenser, the enthalpy value of the condensate of the pre-condenser, the exhaust steam back pressure of the low-pressure cylinder of the steam turbine, and the exhaust steam enthalpy value of the low-pressure cylinder of the steam turbine.

[0026] Based on the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser, obtain the equipment selection scheme of the pre-condenser.

[0027] Optionally, according to the steam booster optimization factor, determine the initial equipment selection schemes of the steam booster and the steam booster condenser, including:

[0028] According to the steam booster pressure increase optimization factor in the steam booster optimization factor, determine the back pressure of the steam booster condenser.

[0029] Obtain the exhaust steam enthalpy value of the steam booster and the enthalpy value of the condensate of the steam booster condenser.

[0030] Based on the exhaust steam enthalpy value of the steam booster and the enthalpy value of the condensate of the steam booster condenser, obtain the consumption of the mixed steam at the outlet of the steam booster.

[0031] Based on the steam booster steam extraction optimization factor and the consumption of the mixed steam at the outlet of the steam booster in the steam booster optimization factor, obtain the exhaust steam consumption in the mixed steam of the steam booster condenser.

[0032] Based on the difference between the consumption of the mixed steam at the outlet of the steam booster and the exhaust steam consumption in the mixed steam of the steam booster condenser, obtain the power steam consumption after the steam booster is desuperheated by spraying water.

[0033] Based on the back pressure of the steam booster condenser, the consumption of the mixed steam at the outlet of the steam booster, the exhaust steam consumption in the mixed steam of the steam booster condenser, and the power steam consumption after the steam booster is desuperheated by spraying water, obtain the initial equipment selection schemes of the steam booster and the steam booster condenser.

[0034] Optionally, determine the unutilized exhaust steam volume in the initial equipment selection schemes of the steam booster and the steam booster condenser, including:

[0035] Based on the heat balance diagram of the target exhaust steam waste heat heating system, obtain the total available exhaust steam of the thermal power plant.

[0036] Obtain the used exhaust steam amount in the initial equipment selection scheme according to the sum of the exhaust steam amount of the pre-condenser and the exhaust steam amount in the mixed steam of the steam booster condenser;

[0037] Obtain the unused exhaust steam amount in the initial equipment selection scheme of the steam booster and the steam booster condenser according to the difference between the total available exhaust steam amount of the thermal power plant and the used exhaust steam amount.

[0038] Optionally, correct the initial equipment selection scheme according to the unused exhaust steam amount to obtain the equipment selection scheme of the steam booster and the steam booster condenser, including:

[0039] Obtain the exhaust steam amount in the corrected mixed steam of the steam booster condenser according to the sum of the unused exhaust steam amount and the used exhaust steam amount in the initial equipment selection scheme;

[0040] Obtain the power steam amount after the spray desuperheating of the corrected steam booster according to the steam booster steam extraction optimization factor and the exhaust steam amount in the corrected mixed steam of the steam booster condenser;

[0041] Obtain the outlet mixed steam amount of the corrected steam booster according to the sum of the exhaust steam amount in the corrected mixed steam of the steam booster condenser and the power steam amount after the spray desuperheating of the corrected steam booster;

[0042] Determine the equipment selection power of the steam booster condenser according to the outlet mixed steam amount of the corrected steam booster;

[0043] Obtain the equipment selection scheme of the steam booster and the steam booster condenser according to the back pressure of the steam booster condenser, the equipment selection power of the steam booster condenser, the exhaust steam amount in the corrected mixed steam of the steam booster condenser, the power steam amount after the spray desuperheating of the corrected steam booster, and the outlet mixed steam amount of the corrected steam booster.

[0044] Optionally, obtain the equipment selection scheme of the heat exchanger heater according to the equipment selection scheme of the pre-condenser, the equipment selection scheme of the steam booster and the steam booster condenser, including:

[0045] Obtain the equipment selection power of the heat exchanger heater according to the difference between the total power of the target exhaust steam waste heat heating system and the equipment selection power of the pre-condenser and the equipment selection power of the steam booster condenser in the equipment selection scheme of the steam booster and the steam booster condenser;

[0046] Obtain the equipment selection scheme of the heat exchanger heater according to the equipment selection power of the heat exchanger heater.

[0047] The present invention also provides an equipment optimization device for an exhaust steam waste heat heating system, including:

[0048] An acquisition module, configured to acquire the heating basic indexes of the target area to which the target exhaust steam waste heat heating system belongs;

[0049] A processing module, configured to determine basic system parameters of a target waste steam heat supply system according to the heating basic indexes; the basic system parameters include the heat network circulating water volume and the total power of the target waste steam heat supply system; obtain system operation parameters of a pre-condenser and a low-pressure cylinder of a steam turbine, and an optimization factor of a steam booster; determine equipment selection schemes for the pre-condenser, the steam booster, a steam booster condenser, and a heat network heater according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the optimization factor of the steam booster, and the basic system parameters; adjust the optimization factor of the steam booster to obtain multiple optional equipment selection schemes for the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater; and determine a target equipment selection scheme from the multiple optional equipment selection schemes according to the optimization factor of the steam booster.

[0050] The present invention further provides a computing device, including: a processor and a memory storing a computer program, where when the computer program is run by the processor, the method as described above is executed.

[0051] The above solution of the present invention has at least the following beneficial effects:

[0052] In the above solution of the present invention, by obtaining heating basic indexes of a target area to which a target waste steam heat supply system belongs; determining basic system parameters of the target waste steam heat supply system according to the heating basic indexes; the basic system parameters include the heat network circulating water volume and the total power of the target waste steam heat supply system; obtaining system operation parameters of a pre-condenser and a low-pressure cylinder of a steam turbine, and an optimization factor of a steam booster; determining equipment selection schemes for the pre-condenser, the steam booster, a steam booster condenser, and a heat network heater according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the optimization factor of the steam booster, and the basic system parameters; adjusting the optimization factor of the steam booster to obtain multiple optional equipment selection schemes for the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater; and determining a target equipment selection scheme from the multiple optional equipment selection schemes according to the optimization factor of the steam booster. The design and equipment selection of the waste steam heat supply system can be optimized, and the thermal efficiency of the unit can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic flow chart of a method for optimizing equipment of a waste steam heat supply system according to an embodiment of the present invention;

[0054] Figure 2 is a schematic structural diagram of a waste steam heat supply system according to an embodiment of the present invention;

[0055] Figure 3 is a structural diagram of an equipment optimization device of a waste steam heat supply system according to an embodiment of the present invention;

[0056] Description of the reference numerals:

[0057] 1. Medium-pressure cylinder of steam turbine; 2. Low-pressure cylinder of steam turbine; 3. Unit exhaust device; 4. Pre-condenser; 5. Steam booster; 6. Condenser of steam booster; 7. Heat network heater; 8. Exhaust steam pipeline; 9. Power steam pipeline; 10. Return pipeline of off-site heat network circulating water; 11. Supply pipeline of off-site heat network circulating water. Specific implementation mode

[0058] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0059] As Figure 1 shown, an equipment optimization method for an exhaust steam waste heat heating system according to an embodiment of the present invention is applied to a target exhaust steam waste heat heating system, and the target exhaust steam waste heat heating system is a three-stage heating system for heating urban heat network circulating water through a pre-condenser, a steam booster and a condenser of the steam booster, and a heat network heater, and includes:

[0060] Step 11, obtaining the heating basic indexes of the target area to which the target exhaust steam waste heat heating system belongs;

[0061] Here, according to the relevant meteorological data, specification requirements and the heating contract of the construction unit in the target area, the heating basic indexes are determined. The heating basic indexes include: project heating index w, outdoor heating temperature t w , outdoor calculated temperature t' w , indoor design temperature t for heating n , heating continuous hours h, and data of the designed urban heat network heating area S.

[0062] Among them, the heating index w, unit: W / m 2 ;

[0063] Outdoor heating temperature t w , unit: °C;

[0064] Outdoor calculated temperature t' w , unit: °C;

[0065] Indoor design temperature t for heating n , unit: °C;

[0066] Continuous hours h, unit: hour (h);

[0067] Designed urban heat network heating area S, unit: 10,000 square meters;

[0068] Step 12: Determine the basic system parameters of the target waste steam heat supply system according to the heating basic index; the basic system parameters include the heat network circulating water volume and the total power of the target waste steam heat supply system.

[0069] Step 13: Obtain the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the optimization factor of the steam booster.

[0070] Step 14: Determine the equipment selection schemes of the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the optimization factor of the steam booster, and the basic system parameters.

[0071] Step 15: Adjust the optimization factor of the steam booster to obtain multiple optional equipment selection schemes for the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater.

[0072] Step 16: Determine the target equipment selection scheme from multiple optional equipment selection schemes according to the optimization factor of the steam booster.

[0073] In this embodiment, the structure of the waste steam heat supply system is as Figure 2 shown, which is a three-stage heating system that heats the urban heat network circulating water through the pre-condenser 4, the steam booster condenser 6, and the heat network heater 7. The water flowing into the waste steam heat supply system from the return pipe of the off-site heat network circulating water passes through the pre-condenser 4, the steam booster condenser 6, and the heat network heater 7 in sequence and then flows out of the system from the supply pipe of the off-site heat network circulating water to heat the city.

[0074] Among them, the pre-condenser 4 is the first-stage heating. At the beginning and end of the heating season, when the heating load is relatively low and only starting the pre-condenser 4 can meet the needs of the urban heat network, only the pre-condenser 4 operates. At this time, the heat source is the waste steam of the low-pressure cylinder 2 of the steam turbine.

[0075] The steam booster 5 and the steam booster condenser 6 are the second-stage heating. As the outdoor temperature drops, the heating load gradually increases, and the inlet and outlet heating temperatures need to be increased. The pre-condenser 4, the steam booster 5, and the steam booster condenser 6 operate simultaneously. At this time, the heat source is the waste steam of the low-pressure cylinder 2 of the steam turbine.

[0076] The heat network heater 7 is the third-stage heating. When the outdoor ambient temperature reaches the coldest and the heating season enters the extremely cold period, the heating load demand is the largest, and the inlet and outlet heating temperatures need to be the highest. The pre-condenser 4, the steam booster 5, the steam booster condenser 6, and the heat network heater 7 operate simultaneously. At this time, the heat source is the waste steam of the low-pressure cylinder 2 of the steam turbine and the extraction steam from the regulating stage of the intermediate-pressure cylinder 1 of the steam turbine.

[0077] The exhaust steam discharged from the low-pressure cylinder 2 of the steam turbine enters the unit exhaust steam device 3 and enters the exhaust steam pipeline 8 through the exhaust steam extraction pipe. A part of the exhaust steam in the exhaust steam pipeline 8 enters the pre-condenser 4, and the circulating water is heated after being utilized by the pre-condenser 4; another part enters the steam booster 5. After the steam booster 5 raises the temperature and pressure of the exhaust steam, the high-temperature and high-pressure exhaust steam enters the steam booster condenser 6, and the steam booster condenser utilizes the high-temperature and high-pressure exhaust steam to heat the circulating water. A part of the extraction steam from the regulating stage discharged from the medium-pressure cylinder 1 of the steam turbine enters the steam booster 5 through the power steam pipeline 9 to raise the temperature and pressure of the exhaust steam; another part enters the heat network heater 7, and the circulating water is heated through the heat network heater 7.

[0078] In the process of optimizing the selection of the target exhaust steam waste heat heating system in this embodiment, first, determine the heating basic indexes of the target area to which the target exhaust steam waste heat heating system belongs. According to the heating basic indexes, perform an overall heating function calculation on the target exhaust steam waste heat heating system to obtain the heat network circulating water volume Gs and the total power Wz of the target exhaust steam waste heat heating system. According to the obtained heat network circulating water volume Gs, the total power Wz of the target exhaust steam waste heat heating system, and some system operation parameters of the pre-condenser, steam booster, steam booster condenser, and low-pressure cylinder of the steam turbine, perform a system optimization selection calculation to obtain the respective equipment selection schemes of the pre-condenser, steam booster, steam booster condenser, and heat network heater. An initial value is assigned to the steam booster optimization factor in the equipment selection scheme. According to the actual technical and economic conditions of the equipment, the value of the steam booster optimization factor is adjusted within a reasonable range to obtain multiple optional equipment selection schemes for the pre-condenser, steam booster, steam booster condenser, and heat network heater. Finally, according to the actual project situation, the support situation of the factory and the manufacturer for the equipment, and the technical and economic performance of the steam booster optimization factor, determine the specific value of the steam booster optimization factor, and then obtain the target equipment selection scheme corresponding to this optimization factor.

[0079] The equipment optimization method of the exhaust steam waste heat heating system in this embodiment can be directly applied to the system design optimization of the exhaust steam waste heat heating system of a thermal power generation unit heating project, the determination of the main equipment selection parameters, and the optimization of the system construction cost. It fills the blank in the field of optimization design of the exhaust steam waste heat heating system. In addition to being applicable to new projects, this optimization design method and its calculation formula can also be applied to the renovation and upgrade of existing projects. It promotes the optimization of the design and equipment selection of the exhaust steam waste heat heating system, reduces the cost during the project construction period, improves the system operation efficiency during the operation period, thereby reducing the cold source loss, improving the thermal efficiency of the unit, and reducing the waste of non-renewable energy fuels and pollutant emissions.

[0080] In an optional embodiment of the present invention, step 12 may include:

[0081] Step 121, determine the heating heat load of the target exhaust steam waste heat heating system according to the heating basic indexes;

[0082] Here, the heating load corresponding to the outdoor calculated temperature t' is determined respectively w and the heating load corresponding to the outdoor heating temperature w

[0083] Among them: the heating loads W1 and W2, with the unit of GJ / h. When W1 and W2 need to be substituted in the subsequent formula calculation method, both are represented by W

[0084] Step 122: Obtain the temperature difference between the supply and return water of the heat network of the target waste steam waste heat heating system in the climate environment of the target area

[0085] Here, collect the supply water temperature t

[0086] and the return water temperature t w corresponding to the outdoor heating temperature w and the outdoor calculated temperature t' of the target area g and calculate the temperature difference Δt between the supply and return water of the heat network h The temperature difference Δt between the supply and return water of the heat network = t

[0087] - t g where t h and t g and t h are in the unit of °C

[0088] Step 123: Determine the basic system parameters of the target waste steam waste heat heating system according to the heating load and the temperature difference between the supply and return water of the heat network

[0089] Here, the basic system parameters include the heat network circulating water volume Gs and the total power Wz of the target waste steam waste heat heating system. Among them, the heat network circulating water volume Gs is in the unit of t / h. Here, since the value of W2 in the waste steam waste heat heating system changes with the outdoor heating temperature, the heat network circulating water volume also changes. The heating system should be selected according to the maximum circulating water volume. Here, W1 and W2 are calculated according to the outdoor temperature, and the maximum value of the heat network circulating water volume corresponding to W1 and W2 is used for the selection of system equipment

[0090] The total power of the target waste steam waste heat heating system W z is in the unit of MW

[0091] In an optional embodiment of the present invention, step 14 may include

[0092] Step 141: Determine the equipment selection scheme of the pre-condenser according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, and the basic system parameters; the equipment selection scheme of the pre-condenser includes the waste steam consumption of the pre-condenser and the equipment selection power of the pre-condenser

[0093] Here, the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine include: the corresponding outdoor heating temperature t w , the outdoor calculated temperature t' w of the circulating water outlet temperature t of the pre-condenser qz , the drain enthalpy value H of the pre-condenser qzss , the exhaust back pressure P of the low-pressure cylinder of the steam turbine by , the exhaust enthalpy value H of the low-pressure cylinder of the steam turbine pq . Among them:

[0094] The circulating water outlet temperature t of the pre-condenser qz , unit: °C;

[0095] The drain enthalpy value H of the pre-condenser qzss , unit: kJ / kg;

[0096] The exhaust back pressure P of the low-pressure cylinder of the steam turbine by , unit: kPa;

[0097] The exhaust enthalpy value g of the low-pressure cylinder of the steam turbine pq , unit: kJ / kg;

[0098] The equipment selection scheme of the pre-condenser mainly includes determining the waste steam consumption G qfq of the pre-condenser and the equipment selection power W qz of the pre-condenser.

[0099] Step 142, according to the steam booster optimization factor, determine the initial equipment selection scheme of the steam booster and the steam booster condenser; the initial equipment selection scheme of the steam booster and the steam booster condenser includes: the back pressure of the steam booster condenser, the outlet mixed steam consumption of the steam booster, the waste steam consumption in the mixed steam of the steam booster condenser, and the motive steam consumption after the steam booster is spray desuperheated;

[0100] Here, the steam booster optimization factor includes the steam booster pressure increase optimization factor δ zqjsy and the steam booster steam extraction optimization factor δ zqjya . The steam booster pressure increase optimization factor δ zqjsy is a dimensionless parameter, and its value range is 1.5 - 1.8, which is determined according to the pressure increase ratio of the steam booster equipment. The steam booster steam extraction optimization factor δ zqjyq is a dimensionless parameter, and its value range is 0.4 - 0.6, which is determined according to the steam extraction ratio of the steam booster equipment.

[0101] Step 143, determine the unutilized waste steam volume in the initial equipment selection scheme of the steam booster and the steam booster condenser;

[0102] The unused exhaust steam quantity is equal to the total available exhaust steam quantity minus the used exhaust steam quantity. The used exhaust steam quantity includes the sum of the exhaust steam quantity used by the steam booster in the initial equipment selection plan of the steam booster and the steam booster condenser and the exhaust steam quantity used by the pre-condenser in the equipment selection plan of the pre-condenser. Among them, the exhaust steam quantity used by the steam booster can be adjusted.

[0103] Step 144, modify the initial equipment selection plan according to the unused exhaust steam quantity to obtain the equipment selection plans of the steam booster and the steam booster condenser;

[0104] Here, the exhaust steam quantity that the steam booster should use is deduced based on the unused exhaust steam quantity to obtain the modified equipment selection plan. Thus, the unused exhaust steam quantity is made close to 0.

[0105] Step 145, obtain the equipment selection plan of the heat network heater according to the equipment selection plan of the pre-condenser, the equipment selection plans of the steam booster and the steam booster condenser.

[0106] In an optional embodiment of the present invention, step 141 may include:

[0107] Step 1411, determine the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, and the basic system parameters; the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine include: the outlet temperature of the circulating water of the pre-condenser, the enthalpy value of the condensate of the pre-condenser, the exhaust steam back pressure of the low-pressure cylinder of the steam turbine, and the exhaust steam enthalpy value of the low-pressure cylinder of the steam turbine;

[0108] The exhaust steam consumption of the pre-condenser

[0109] The equipment selection power of the pre-condenser

[0110] Step 1412, obtain the equipment selection plan of the pre-condenser according to the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser.

[0111] In an optional embodiment of the present invention, step 142 may include:

[0112] Step 1421, determine the back pressure of the steam booster condenser according to the steam booster pressure increase optimization factor in the steam booster optimization factor;

[0113] Based on the exhaust steam back pressure P by of the low-pressure cylinder of the steam turbine and the steam booster pressure increase optimization factor δ zqjsy , calculate the back pressure P zqj of the steam booster condenser = P by ×δ zqjsy , where P zqjUnit: kPa.

[0114] Step 1422: Obtain the exhaust enthalpy value of the steam booster and the drain enthalpy value of the steam booster condenser.

[0115] According to the heat balance diagram data, determine the exhaust enthalpy value H of the steam booster zqj and the drain enthalpy value H of the steam booster condenser zqjss , unit: kJ / kg.

[0116] Step 1423: Obtain the consumption of the mixed steam at the outlet of the steam booster based on the exhaust enthalpy value of the steam booster and the drain enthalpy value of the steam booster condenser.

[0117] Consumption of the mixed steam at the outlet of the steam booster

[0118] where t zqj is the outlet temperature of the circulating water of the steam booster condenser, which is determined according to the heat balance diagram data and the steam turbine technical agreement.

[0119] Consumption of the mixed steam at the outlet of the steam booster G zqjq Unit: t / h, which is composed of the motive steam of the steam booster and the exhaust steam of the steam turbine. The temperature and pressure of the exhaust steam of the steam turbine are increased by the motive steam, and the temperature of the exhaust steam heating the heat network circulating water is enhanced. The motive steam is sourced from the extraction steam of the medium-pressure cylinder of the steam turbine.

[0120] Step 1424: Obtain the consumption of the exhaust steam in the mixed steam of the steam booster condenser based on the steam booster extraction optimization factor and the consumption of the mixed steam at the outlet of the steam booster in the steam booster optimization factor.

[0121] Consumption of the exhaust steam in the mixed steam of the steam booster condenser G zqjfq = G zqjq ×δ zqjyq where G zqjfq Unit: t / h.

[0122] Step 1425: Obtain the motive steam consumption after the steam booster spray desuperheating based on the difference between the consumption of the mixed steam at the outlet of the steam booster and the consumption of the exhaust steam in the mixed steam of the steam booster condenser.

[0123] Motive steam consumption after the steam booster spray desuperheating G zqjdl = G zqjq - G zqjfq .

[0124] Step 1426: Obtain the initial equipment selection scheme for the steam booster and the steam booster condenser based on the back pressure of the steam booster condenser, the consumption of the mixed steam at the outlet of the steam booster, the consumption of the exhaust steam in the mixed steam of the steam booster condenser, and the motive steam consumption after the steam booster spray desuperheating.

[0125] In an optional embodiment of the present invention, step 143 may include:

[0126] Step 1431: Obtain the total available amount of exhaust steam from the thermal power plant according to the heat balance diagram of the target waste heat heating system using exhaust steam.

[0127] Step 1432: Obtain the amount of exhaust steam already used in the initial equipment selection plan according to the sum of the exhaust steam consumption of the pre-condenser and the exhaust steam consumption in the mixed steam of the steam booster condenser.

[0128] The amount of exhaust steam already used, G yy = G qzfq + G zqjfq , where G qzfq is the exhaust steam consumption of the pre-condenser, G zqjfq is the exhaust steam consumption in the mixed steam of the steam booster condenser, and G yy is in the unit of t / h.

[0129] Step 1433: Obtain the amount of unused exhaust steam in the initial equipment selection plan of the steam booster and the steam booster condenser according to the difference between the total available amount of exhaust steam from the thermal power plant and the amount of exhaust steam already used.

[0130] The amount of unused exhaust steam, G wly = G z f q - G yy , where G zfq is the total available amount of exhaust steam from the thermal power plant. For newly built units, G wly can be iteratively optimized and calculated by the formula of the present invention to approach 0, so as to obtain the optimal exhaust steam utilization rate. For retrofitted units, the minimum exhaust steam flow for winter anti-condensation should be reserved according to the air-cooling technical agreement, and iterative calculation should be carried out to make G wly approach the minimum exhaust steam flow for winter anti-condensation, so as to obtain the optimal exhaust steam utilization rate.

[0131] In an optional embodiment of the present invention, step 144 may include:

[0132] Step 1441: Obtain the exhaust steam consumption in the corrected mixed steam of the steam booster condenser according to the sum of the amount of unused exhaust steam and the amount of exhaust steam already used in the initial equipment selection plan.

[0133] The exhaust steam consumption in the corrected mixed steam of the steam booster condenser, G' zqjfq = G zajfq + G wly .

[0134] Step 1442: Obtain the power steam consumption after the corrected desuperheating by spraying water in the steam booster according to the steam extraction optimization factor of the steam booster and the exhaust steam consumption in the corrected mixed steam of the steam booster condenser.

[0135] The power steam consumption after the corrected desuperheating by spraying water in the steam booster

[0136] Step 1443: Obtain the corrected steam turbine condenser outlet mixed steam consumption based on the sum of the exhaust steam consumption in the mixed steam of the corrected steam turbine condenser and the motive steam consumption after spray desuperheating of the corrected steam turbine.

[0137] Corrected steam turbine condenser outlet mixed steam consumption G’ zqjq =G’ zqjdl +G’ zqifq 。

[0138] Step 1444: Determine the selected power of the steam turbine condenser equipment based on the corrected steam turbine condenser outlet mixed steam consumption.

[0139] Selected power of the steam turbine condenser equipment

[0140] Step 1445: Obtain the equipment selection scheme for the steam turbine and the steam turbine condenser based on the back pressure of the steam turbine condenser, the selected power of the steam turbine condenser equipment, the exhaust steam consumption in the mixed steam of the corrected steam turbine condenser, the motive steam consumption after spray desuperheating of the corrected steam turbine, and the corrected steam turbine condenser outlet mixed steam consumption.

[0141] In an optional embodiment of the present invention, Step 145 may include:

[0142] Step 1451: Obtain the selected power of the heat network heater equipment based on the difference between the total power of the target exhaust steam waste heat heating system and the selected power of the pre-condenser equipment and the selected power of the steam turbine condenser equipment in the equipment selection scheme for the steam turbine and the steam turbine condenser.

[0143] Selected power of the heat network heater equipment W rw =W z -W qz -W zqj 。

[0144] Step 1452: Obtain the equipment selection scheme for the heat network heater based on the selected power of the heat network heater equipment.

[0145] For the equipment optimization method of the exhaust steam waste heat heating system in the above embodiment of the present invention, iterative calculations are performed based on the heat balance diagram and the boundary data provided by the relevant equipment technical agreements, so that G wly is as close as possible to the minimum required value to improve the exhaust steam utilization rate and thermal efficiency of the system. During the iterative process, the parameters of each optimization factor can be adjusted in cooperation with the equipment manufacturer. The finally determined values such as flow rate, temperature, pressure, and power can be used as the selection parameters for the pre-condenser, steam turbine, and steam turbine condenser equipment. At the same time, they can also be used as the selection parameters for the pipelines, key components, and components of the main systems such as the exhaust steam system, extraction steam system, motive steam system, and desuperheating water system.

[0146] The optimization design method, its calculation formula, and the optimization factor proposed by the present invention are used to perform optimization calculations on the overall system function and target parameters of the above-mentioned waste steam waste heat heating system to obtain the optimal heating capacity of the system; calculate the equipment parameters to obtain the optimization results, which can be directly used for equipment procurement and use; perform optimized selection on the pipelines and pipe fittings of the above-mentioned system to obtain the optimal setting of the system; verify the selected parameters of each part of the system equipment, and review whether the equipment linkage matching degree and equipment selection meet the requirements of the optimal heating capacity of the system.

[0147] As Figure 3 shown, an equipment optimization device 30 for a waste steam waste heat heating system according to an embodiment of the present invention includes:

[0148] An acquisition module 31, configured to acquire the heating basic indexes of the target area to which the target waste steam waste heat heating system belongs;

[0149] A processing module 32, configured to determine the basic system parameters of the target waste steam waste heat heating system according to the heating basic indexes; the basic system parameters include the heat network circulating water volume and the total power of the target waste steam waste heat heating system; acquire the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, and the optimization factor of the steam booster; determine the equipment selection schemes of the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the optimization factor of the steam booster, and the basic system parameters; adjust the optimization factor of the steam booster to obtain multiple optional equipment selection schemes of the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater; determine the target equipment selection scheme from multiple optional equipment selection schemes according to the optimization factor of the steam booster.

[0150] Optionally, determining the basic system parameters of the target waste steam waste heat heating system according to the heating basic indexes includes:

[0151] Determine the heating heat load of the target waste steam waste heat heating system according to the heating basic indexes;

[0152] Acquire the temperature difference between the supply and return water of the heat network of the target waste steam waste heat heating system under the climate environment of the target area;

[0153] Determine the basic system parameters of the target waste steam waste heat heating system according to the heating heat load and the temperature difference between the supply and return water of the heat network.

[0154] Optionally, determining the equipment selection schemes of the pre-condenser, the steam booster, the steam booster condenser, and the heat network heater according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the optimization factor of the steam booster, and the basic system parameters includes:

[0155] Determine the equipment selection scheme of the pre-condenser according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the basic system parameters; the equipment selection scheme of the pre-condenser includes the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser.

[0156] Determine the initial equipment selection scheme of the steam booster and the steam booster condenser according to the steam booster optimization factor; the initial equipment selection scheme of the steam booster and the steam booster condenser includes: the back pressure of the steam booster condenser, the mixed steam consumption at the outlet of the steam booster, the exhaust steam consumption in the mixed steam of the steam booster condenser, and the motive steam consumption after the steam booster is desuperheated by spraying water.

[0157] Determine the unutilized exhaust steam volume in the initial equipment selection scheme of the steam booster and the steam booster condenser.

[0158] Revise the initial equipment selection scheme according to the unutilized exhaust steam volume to obtain the equipment selection scheme of the steam booster and the steam booster condenser.

[0159] Obtain the equipment selection scheme of the heat network heater according to the equipment selection scheme of the pre-condenser, the equipment selection scheme of the steam booster and the steam booster condenser.

[0160] Optionally, determining the equipment selection scheme of the pre-condenser according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the basic system parameters, includes:

[0161] Determine the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the basic system parameters; the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine include: the outlet temperature of the circulating water of the pre-condenser, the enthalpy value of the condensate of the pre-condenser, the exhaust back pressure of the low-pressure cylinder of the steam turbine, and the exhaust enthalpy value of the low-pressure cylinder of the steam turbine.

[0162] Obtain the equipment selection scheme of the pre-condenser according to the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser.

[0163] Optionally, determining the initial equipment selection scheme of the steam booster and the steam booster condenser according to the steam booster optimization factor includes:

[0164] Determine the back pressure of the steam booster condenser according to the steam booster pressure increase optimization factor in the steam booster optimization factor.

[0165] Obtain the exhaust enthalpy value of the steam booster and the enthalpy value of the condensate of the steam booster condenser.

[0166] Obtain the mixed steam consumption at the outlet of the steam booster according to the exhaust enthalpy value of the steam booster and the enthalpy value of the condensate of the steam booster condenser.

[0167] Based on the steam extraction optimization factor and the amount of mixed steam used at the outlet of the steam booster in the steam booster optimization factor, the amount of exhausted steam in the mixed steam of the steam booster condenser is obtained;

[0168] Based on the difference between the amount of mixed steam used at the outlet of the steam booster and the amount of exhausted steam in the mixed steam of the steam booster condenser, the amount of motive steam after desuperheating by spraying water in the steam booster is obtained;

[0169] Based on the back pressure of the steam booster condenser, the amount of mixed steam used at the outlet of the steam booster, the amount of exhausted steam in the mixed steam of the steam booster condenser, and the amount of motive steam after desuperheating by spraying water in the steam booster, an initial equipment selection scheme for the steam booster and the steam booster condenser is obtained.

[0170] Optionally, determining the amount of unused exhausted steam in the initial equipment selection scheme for the steam booster and the steam booster condenser includes:

[0171] Based on the heat balance diagram of the target exhausted steam waste heat heating system, the total available amount of exhausted steam in the thermal power plant is obtained;

[0172] Based on the sum of the amount of exhausted steam used in the pre-condenser and the amount of exhausted steam in the mixed steam of the steam booster condenser, the amount of exhausted steam used in the initial equipment selection scheme is obtained;

[0173] Based on the difference between the total available amount of exhausted steam in the thermal power plant and the amount of exhausted steam used, the amount of unused exhausted steam in the initial equipment selection scheme for the steam booster and the steam booster condenser is obtained.

[0174] Optionally, correcting the initial equipment selection scheme according to the amount of unused exhausted steam to obtain an equipment selection scheme for the steam booster and the steam booster condenser, including:

[0175] Based on the sum of the amount of unused exhausted steam and the amount of exhausted steam used in the initial equipment selection scheme, the amount of exhausted steam in the corrected mixed steam of the steam booster condenser is obtained;

[0176] Based on the steam extraction optimization factor and the amount of exhausted steam in the corrected mixed steam of the steam booster condenser, the amount of motive steam after desuperheating by spraying water in the corrected steam booster is obtained;

[0177] Based on the sum of the amount of exhausted steam in the corrected mixed steam of the steam booster condenser and the amount of motive steam after desuperheating by spraying water in the corrected steam booster, the amount of mixed steam used at the outlet of the corrected steam booster is obtained;

[0178] Based on the amount of mixed steam used at the outlet of the corrected steam booster, the equipment selection power of the steam booster condenser is determined;

[0179] Based on the back pressure of the steam booster condenser, the equipment selection power of the steam booster condenser, the amount of exhausted steam in the corrected mixed steam of the steam booster condenser, the amount of motive steam after desuperheating by spraying water in the corrected steam booster, and the amount of mixed steam used at the outlet of the corrected steam booster, an equipment selection scheme for the steam booster and the steam booster condenser is obtained.

[0180] Optionally, according to the equipment selection scheme of the pre-condenser, the equipment selection scheme of the steam booster and the steam booster condenser, the equipment selection scheme of the heat network heater is obtained, including:

[0181] According to the difference between the total power of the target waste steam waste heat heating system and the equipment selection power of the pre-condenser and the equipment selection power of the steam booster condenser in the equipment selection scheme of the steam booster and the steam booster condenser, the equipment selection power of the heat network heater is obtained;

[0182] According to the equipment selection power of the heat network heater, the equipment selection scheme of the heat network heater is obtained.

[0183] It should be noted that this device corresponds to the above method, and all implementation manners in the above method embodiments are applicable to the embodiments of this device and can achieve the same technical effects.

[0184] An embodiment of the present invention also provides a computing device, including: a processor and a memory storing a computer program. When the computer program is run by the processor, it executes the method as described above. All implementation manners in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0185] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0186] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be described in detail here.

[0187] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be in electrical, mechanical or other forms.

[0188] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed over multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0189] In addition, in each embodiment of the present invention, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0190] If the above-mentioned function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0191] In addition, it should be noted that in the devices and methods of the present invention, obviously, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. And, the steps of performing the above series of processes can naturally be executed in chronological order according to the described order, but it is not necessary to be executed in chronological order. Some steps can be executed in parallel or independently of each other. For those of ordinary skill in the art, it can be understood that all or any steps or components of the methods and devices of the present invention can be implemented in any computing device (including a processor, a storage medium, etc.) or a network of computing devices in the form of hardware, firmware, software, or a combination thereof, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0192] Therefore, the object of the present invention can also be achieved by running a program or a set of programs on any computing device. The computing device may be a well-known general-purpose device. Therefore, the object of the present invention can also be achieved only by providing a program product containing program code for implementing the method or device. That is to say, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium may be any well-known storage medium or any storage medium developed in the future. It should also be noted that in the device and method of the present invention, obviously, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. And, the steps of performing the above series of processes can naturally be executed in chronological order according to the described order, but it is not necessary to be executed in chronological order. Some steps can be executed in parallel or independently of each other.

[0193] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for optimizing equipment of a waste steam waste heat heating system, characterized in that: Applied to the target exhaust steam waste heat heating system, the target exhaust steam waste heat heating system is a three-stage heating system for heating the circulating water of the urban heating network through a pre-condenser, a steam booster and a steam booster condenser, and a heating network heater, including: Obtain the basic heating indicators of the target area to which the target exhaust steam waste heat heating system belongs; According to the basic heating index, the basic system parameters of the target exhaust steam waste heat heating system are determined; the basic system parameters include the circulating water volume of the heating network and the total power of the target exhaust steam waste heat heating system; Obtain system operating parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the optimization factors of the steam booster; Determine the equipment selection scheme of the pre-condenser, the steam booster, the steam booster condenser, and the heating network heater according to the system operating parameters of the pre-condenser and the steam turbine low-pressure cylinder, the steam booster optimization factor, and the basic system parameters; The steam booster optimization factor is adjusted to obtain a plurality of optional equipment selection schemes for pre-condensers, steam boosters, steam booster condensers, and heat network heaters; According to the steam booster optimization factor, a target equipment selection scheme is determined from a plurality of optional equipment selection schemes.

2. The equipment optimization method of the exhaust steam waste heat heating system according to claim 1 is characterized in that: According to the basic heating indicators, the basic system parameters of the target exhaust steam waste heat heating system are determined, including: Determine the heating load of the target exhaust steam waste heat heating system according to the basic heating index; Obtain the supply and return water temperature difference of the heat network of the target exhaust steam waste heat heating system under the climate environment of the target area; According to the heating heat load and the supply and return water temperature difference of the heating network, the basic system parameters of the target exhaust steam waste heat heating system are determined.

3. The equipment optimization method of the exhaust steam waste heat heating system according to claim 1 is characterized in that: According to the system operating parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the optimization factor of the steam booster and the basic system parameters, the equipment selection scheme of the pre-condenser, the steam booster, the steam booster condenser and the heating network heater is determined, including: Determine the equipment selection scheme of the pre-condenser according to the system operation parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the basic system parameters; the equipment selection scheme of the pre-condenser includes the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser; According to the steam booster optimization factor, the initial equipment selection scheme of the steam booster and the steam booster condenser is determined; the initial equipment selection scheme of the steam booster and the steam booster condenser includes: the back pressure of the steam booster condenser, the amount of mixed steam at the steam booster outlet, the amount of exhaust steam in the mixed steam of the steam booster condenser, and the amount of power steam after water spraying and desuperheating of the steam booster; Determining the amount of unused exhaust steam in the initial equipment selection plan for the steam booster and the steam booster condenser; The initial equipment selection scheme is modified according to the unused exhaust steam amount to obtain an equipment selection scheme for a steam booster and a steam booster condenser; According to the equipment selection scheme of the pre-condenser, the equipment selection scheme of the steam booster and the steam booster condenser, the equipment selection scheme of the heating network heater is obtained.

4. The equipment optimization method of the exhaust steam waste heat heating system according to claim 3 is characterized in that: According to the system operating parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the basic system parameters, the equipment selection scheme of the pre-condenser is determined, including: According to the system operating parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, and the basic system parameters, the exhaust steam consumption of the pre-condenser and the selected power of the pre-condenser equipment are determined; the system operating parameters of the pre-condenser and the low-pressure cylinder of the steam turbine include: the pre-condenser circulating water outlet temperature, the pre-condenser drain enthalpy value, the steam turbine low-pressure cylinder exhaust back pressure and the steam turbine low-pressure cylinder exhaust enthalpy value; According to the exhaust steam consumption of the pre-condenser and the equipment selection power of the pre-condenser, an equipment selection scheme for the pre-condenser is obtained.

5. The equipment optimization method of the exhaust steam waste heat heating system according to claim 3 is characterized in that: According to the steam booster optimization factors, the initial equipment selection scheme for the steam booster and the steam booster condenser is determined, including: Determining the back pressure of the steam booster condenser according to the steam booster pressure optimization factor in the steam booster optimization factor; Obtain the exhaust enthalpy value of the steam booster and the drain enthalpy value of the condenser of the steam booster; According to the exhaust enthalpy value of the steam booster and the drain enthalpy value of the condenser of the steam booster, the mixed steam consumption at the outlet of the steam booster is obtained; According to the steam booster induction steam optimization factor and the steam booster outlet mixed steam usage in the steam booster optimization factor, the exhaust steam usage in the steam booster condenser mixed steam is obtained; According to the difference between the amount of mixed steam at the steam booster outlet and the amount of exhaust steam in the mixed steam of the steam booster condenser, the amount of motive steam after water spraying and temperature reduction of the steam booster is obtained; According to the booster condenser back pressure, booster outlet mixed steam consumption, exhaust steam consumption in the booster condenser mixed steam and power steam consumption after booster water spraying and temperature reduction, an initial equipment selection plan for the booster and booster condenser is obtained.

6. The equipment optimization method of the exhaust steam waste heat heating system according to claim 3 is characterized in that: Determine the amount of unused exhaust steam in the initial equipment selection plan for the steam booster and steam booster condenser, including: According to the heat balance diagram of the target exhaust steam waste heat heating system, the total available amount of exhaust steam of the thermal power plant is obtained; Obtaining the amount of used exhaust steam in the initial equipment selection scheme according to the sum of the exhaust steam usage of the pre-condenser and the exhaust steam usage in the mixed steam of the booster condenser; According to the difference between the total available exhaust steam amount and the used exhaust steam amount of the thermal power plant, the unused exhaust steam amount in the initial equipment selection scheme of the steam booster and the steam booster condenser is obtained.

7. The equipment optimization method of the exhaust steam waste heat heating system according to claim 3 is characterized in that: The initial equipment selection scheme is modified according to the unused exhaust steam amount to obtain an equipment selection scheme for a steam booster and a steam booster condenser, including: According to the sum of the unused exhaust steam amount and the used exhaust steam amount in the initial equipment selection scheme, the exhaust steam amount in the mixed steam of the steam booster condenser is corrected; According to the steam optimization factor of the steam booster and the amount of exhaust steam in the mixed steam of the steam booster condenser, the amount of power steam after the steam booster is corrected by water spraying and cooling is obtained. According to the sum of the exhaust steam consumption in the mixed steam of the steam booster condenser and the power steam consumption after the steam booster is desuperheated by water spraying, the mixed steam consumption at the outlet of the steam booster is corrected; According to the modified steam consumption of the steam booster outlet, the power of the condenser equipment of the steam booster is determined; According to the booster condenser back pressure, the booster condenser equipment selection power, the amount of exhaust steam in the booster condenser mixed steam, the amount of power steam after the booster water spray cooling and the amount of mixed steam at the booster outlet, the equipment selection plan for the booster and the booster condenser is obtained.

8. The equipment optimization method for the exhaust steam waste heat heating system according to claim 3 is characterized in that: According to the equipment selection scheme of the pre-condenser, the equipment selection scheme of the steam booster and the steam booster condenser, the equipment selection scheme of the heating network heater is obtained, including: The selected power of the heating network heater is obtained according to the difference between the total power of the target exhaust steam waste heat heating system and the selected power of the pre-condenser equipment and the selected power of the booster condenser equipment in the equipment selection scheme of the booster and the booster condenser; According to the selected power of the heating network heater equipment, an equipment selection scheme of the heating network heater is obtained.

9. An equipment optimization device for a waste steam waste heat heating system, characterized in that: include: An acquisition module is used to obtain basic heating indicators of a target area to which a target exhaust steam waste heat heating system belongs; A processing module, used to determine the basic system parameters of the target exhaust steam waste heat heating system according to the basic heating indicators; the basic system parameters include the circulating water volume of the heating network and the total power of the target exhaust steam waste heat heating system; Obtain system operating parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, as well as the optimization factors of the steam booster; According to the system operating parameters of the pre-condenser and the low-pressure cylinder of the steam turbine, the steam booster optimization factor and the basic system parameters, the equipment selection scheme of the pre-condenser, the steam booster, the steam booster condenser and the heat network heater is determined; the steam booster optimization factor is adjusted to obtain multiple optional equipment selection schemes of the pre-condenser, the steam booster, the steam booster condenser and the heat network heater; according to the steam booster optimization factor, a target equipment selection scheme is determined from the multiple optional equipment selection schemes.

10. A computing device, characterized in that include: A processor and a memory storing a computer program, wherein when the computer program is executed by the processor, the method according to any one of claims 1 to 8 is performed.

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