Search

CN-122018303-A - Optimized control system and method for recovering latent heat of steam condensate through injection phase change

CN122018303ACN 122018303 ACN122018303 ACN 122018303ACN-122018303-A

Abstract

The invention provides an optimizing control system and a method for injecting phase change recovery steam condensate latent heat, which relate to the technical field of optimizing control, wherein the system comprises: the raw material parameter association module is used for analyzing the processing raw material data to obtain process dynamic parameters, and establishing association relation with the steam condensate parameter data by combining the heating requirement of the steam separator. And the cooperative data integration module is used for integrating according to the control parameters of the jet pump and combining the corresponding relation between the pressure of the flash tank and the liquid level to obtain cooperative control data. The steam amount calculation module is used for analyzing the influence of the aging degree of the parts on the steam condensate parameter data to obtain a wear influence coefficient, and calculating the suction steam amount by combining the steam condensate parameter data. And the optimization scheme generation module is used for generating a control scheme according to the Uighur optimization algorithm and combining the cooperative control data, the association relation and the suction steam quantity. The invention improves the recovery efficiency and the utilization efficiency of the steam condensate water and reduces the energy consumption and the operation cost.

Inventors

  • MENG XIANGYONG
  • WU GUOXIN

Assignees

  • 天津市川宏仪表系统科技有限公司

Dates

Publication Date
20260512
Application Date
20251205

Claims (10)

  1. 1. An optimized control system for ejecting phase change to recover latent heat of steam condensate water, which is characterized by comprising: The raw material parameter association module is used for collecting processing raw material data and steam condensate parameter data, analyzing the processing raw material data to obtain process dynamic parameters, and establishing association relation with the steam condensate parameter data by combining the heating requirement of a steam stripping machine; the cooperative data integration module is used for controlling the temperature according to the pressure and the flow of the jet pump to obtain jet pump control parameters, and integrating the corresponding relation between the pressure and the liquid level of the flash tank to obtain cooperative control data; The steam amount calculation module is used for analyzing the influence of the aging degree of the parts on the steam condensate parameter data to obtain a wear influence coefficient, and calculating the suction steam amount by combining the steam condensate parameter data; and the optimization scheme generation module is used for generating a control scheme according to the Uighur optimization algorithm and combining the cooperative control data, the association relation and the suction steam quantity.
  2. 2. The optimizing control system for injecting phase change recovery steam condensate latent heat as claimed in claim 1, wherein said step of obtaining said process dynamic parameters by said raw material parameter correlation module comprises: filling the missing value of the processing raw material data, filtering noise, and unifying time granularity to obtain pretreated raw material data; Extracting real-time flow values of preset time intervals from the preprocessed raw material data to form continuous raw material flow data, and calculating fluctuation amplitude, fluctuation efficiency and load fluctuation coefficient as flow fluctuation characteristics by taking preset time as a sliding window; And correcting the real-time monitoring value and the off-line detection calibration value of the on-line sensor to obtain material solvent residual data at preset time intervals, and analyzing the solvent vapor partial pressure and the water vapor partial pressure based on the gas phase total pressure and the gas phase components of the processing equipment to form gas phase partial pressure data.
  3. 3. The optimizing control system for injecting phase change recovery steam condensate latent heat according to claim 2, wherein the step of establishing the association relationship by the raw material parameter association module comprises: Calculating the change rate of indirect gas consumption of the steam-off machine under different dynamic fluctuation deviations of each batch of processing raw materials by taking the process dynamic parameters as references, and forming a dynamic parameter-gas consumption corresponding relation; Correlating the yield, pressure and enthalpy of the condensate water with indirect gas consumption, and combining the influences of gas phase partial pressure and drain valve gas leakage on the heat value of the condensate water to obtain condensate water heating influence; Based on the dynamic parameter-air consumption correspondence and the condensate water heating influence, dismantling into three-stage progressive logic, and constructing a time-dynamic parameter-air consumption-condensate water parameter correlation matrix; And correcting the incidence matrix according to the retention time of the processed raw materials and the steam pressure transfer lag to obtain the incidence relation.
  4. 4. The optimizing control system for recovering latent heat of steam condensate through injection phase change according to claim 1, wherein the step of obtaining the control parameter of the jet pump through the cooperative data integration module comprises the following steps: determining an operation target of the jet pump according to target requirements so as to clearly control the target, and collecting monitoring parameters of different ports in real time; Determining the pressure and flow regulating direction according to the current mixed steam pressure and combining the control target, and regulating the opening of the nozzle step by step to obtain pressure and flow standard parameters; Calculating actual superheat degree and deviation based on the pressure flow standard reaching parameter and the steam thermodynamic property, and controlling output temperature by adjusting the temperature-reducing water flow to obtain a temperature standard reaching parameter; and according to the pressure flow reaching parameter and the temperature reaching parameter, debugging is carried out under different load fluctuation to determine the control parameter of the injection pump reaching the control target.
  5. 5. The optimizing control system for recovering latent heat of steam condensate through injection phase change according to claim 4, wherein the step of obtaining the cooperative control data by the cooperative data integration module comprises: Synchronously acquiring real-time data of the jet pump and the flash tank, and establishing a parameter corresponding logic under an initial acquisition reference; Analyzing the variation trend of the pressure of the flash tank according to the influence of the control parameters of the jet pump on the pressure of the flash tank, and determining a pressure balance interval by combining a pressure target; the liquid level is changed by adjusting a drain valve of the flash tank, the influence on the condensed water phase change efficiency and the flash steam suction amount of the jet pump is analyzed, and feedback logic of the liquid level on the control parameters of the jet pump is obtained; determining a liquid level safety interval according to the feedback logic and in combination with the stability requirement of the control parameters of the injection pump; And determining a valve correction state of the flash tank based on the pressure balance interval and the liquid level safety interval, and monitoring whether the input change of the injection pump reaches the control target, if so, obtaining the cooperative control data.
  6. 6. The optimizing control system for recovering latent heat of steam condensate through injection phase change according to claim 1, wherein the step of obtaining the abrasion influence coefficient by the steam quantity calculation module comprises the following steps: screening key aging parts by combining an operation principle and field fault records, and definitely constructing an original data set by corresponding steam condensate parameter data; Setting quantization indexes for aging characteristics of different key aging parts, and screening corresponding parameter change rates for each key aging part based on the original data set; Judging an aging influence rule based on the parameter change rate and the quantization index, and determining the weight of the parts by a analytic hierarchy process based on the significance of the influence of each key aging part on the steam condensate parameter data; And fitting to obtain the abrasion influence coefficient of each key aging part according to the aging influence rule and combining the part weight.
  7. 7. An ejector phase change vapor condensate latent heat recovery optimization control system as defined in claim 1, wherein said vapor volume calculation module calculates said suction vapor volume comprising: Obtaining a pressure correction, a flash vapor yield correction, and a suction efficiency correction from the wear influence coefficient; calculating the pumping steam quantity according to the pressure correction quantity, the flash steam yield correction quantity and the pumping efficiency correction quantity and combining the steam condensate parameter data, wherein the formula is expressed as follows: ; In the formula, Is the amount of the sucked steam, Is the amount of correction of the suction efficiency, The saturated water heating value of the steam source steam after the pressure correction is adjusted, Is the saturated water heating value after the pressure correction is adjusted, Is the latent heat of saturated steam, Is the indirect use of the instantaneous flow of the steam, Is the flash steam yield correction quantity, Is the initial flash vapor yield.
  8. 8. The optimizing control system for recovering latent heat of steam condensate through injection phase change according to claim 1, wherein the optimizing scheme generating module comprises: the constraint and population generation unit is used for determining constraint conditions from three aspects of hardware, safety and response speed, integrating the cooperative control data, the association relation and the pumping steam quantity into decision variable vectors, and generating a Wuyangull initial population by combining with Tent chaotic mapping; The Uighur position updating unit is used for avoiding collision to the current Uighur individual position and approaching to the current optimal individual position, and is combined with spiral hunting to update the positions to obtain a plurality of Uighur updated positions; the fitness value calculation unit is used for converting the decision variable vector into a fitness value in combination with a cooperative control target, calculating the fitness value of each Uighur's update position, and taking an individual with the smallest fitness value as a global optimal solution; and the control scheme selecting unit is used for selecting a decision variable vector with the minimum fitness value from the globally optimal solution generated by each iteration as the control scheme after the iteration is performed for the maximum number of times.
  9. 9. The optimizing control system for recovering latent heat of steam condensate through injection phase change according to claim 8, wherein said step of obtaining a plurality of gull-position updating positions by said gull-position updating unit comprises: according to the current individual position of the Wuyangull, the individual collision of the Wuyangull is avoided to generate an individual new position; Calculating the relative distance between the current individual position of the gull and the current optimal individual position, and guiding the current individual to move towards the optimal direction; Calculating the total displacement of individual movement of the gull according to the relative distance and the new individual position; Simulating fine search of a mew attack prey through spiral flight, and generating a spiral update position based on the total displacement and the current optimal individual position; and updating the current individual positions of the Wuyangulls according to the total displacement and the spiral updating positions to obtain a plurality of updated positions of the Wuyangulls.
  10. 10. An optimizing control method for injecting phase change recovery steam condensate latent heat, which adopts an optimizing control system for injecting phase change recovery steam condensate latent heat according to any one of claims 1 to 9, characterized in that the optimizing control method comprises: Collecting processing raw material data and steam condensate parameter data, analyzing the processing raw material data to obtain a process dynamic parameter, and establishing an association relation with the steam condensate parameter data by combining a steam-off machine heating requirement; Controlling the temperature according to the pressure and the flow of the jet pump to obtain control parameters of the jet pump, and integrating the corresponding relation between the pressure and the liquid level of the flash tank to obtain cooperative control data; analyzing the influence of the aging degree of the parts on the steam condensate parameter data to obtain a wear influence coefficient, and calculating the suction steam quantity by combining the steam condensate parameter data; And generating a control scheme according to the Uygur-mew optimization algorithm and combining the cooperative control data, the association relation and the suction steam quantity.

Description

Optimized control system and method for recovering latent heat of steam condensate through injection phase change Technical Field The invention relates to the technical field of optimal control, in particular to an optimal control system and method for recovering latent heat of steam condensate through injection phase change. Background In the aspect of latent heat recovery and utilization of high-heating-value steam condensate water, the traditional indirect heat exchange, natural flash evaporation and other technologies, although the technology is continuously improved and innovated in practice, the problems of low heat energy utilization rate, incomplete heat recovery and the like still exist. Saturated condensed water with high heat value generated in indirect steam heating processes such as a steam stripping machine, mixed oil evaporation, mineral oil recovery and the like is discharged into a normal pressure condensed water recovery tank after being directly or simply subjected to supercooling heat exchange, wherein the saturated condensed water possibly further contains fresh steam mixed in a part of failure of a drain valve, secondary flash evaporation is generated in the condensed water recovery tank, and a large amount of heat is carried by flash evaporation steam to escape from the condensed water recovery tank, so that a large amount of heat energy is wasted. During long-term operation, core components (such as jet pump nozzles, flash tank inner walls, drain valves, throttle valves and the like) in the system can be aged due to the problems of medium flushing, scaling, sealing element abrasion and the like. However, the existing system does not establish the associated logic of the aging degree of parts and steam condensate parameters, and does not quantify the influence of aging on calculation of the amount of the sucked steam, so that the calculation deviation of the amount of the sucked steam is gradually expanded along with the increase of the service time of equipment, further the control parameters of the jet pump and the flash tank are disjointed from the actual requirements, the problems of insufficient energy supply or overpressure operation of heat utilization equipment occur, and the energy saving effect and the operation safety of the system are seriously affected. The operation of the injection phase change recovery system relates to the linkage of multi-dimensional data and multi-equipment parameters, namely, the water fluctuation of the processed raw materials can directly influence the heating requirement of the steam stripping machine from the raw material end, so that the consumption of secondary steam is changed, and the pressure, flow and temperature parameters of the injection pump have strong coupling relation with the pressure and liquid level parameters of the flash tank from the equipment end. In summary, an optimized control system and method for recovering latent heat of steam condensate through injection phase change are needed to solve the above technical defects and improve the latent heat recovery efficiency, operation stability and adaptability of the system. Disclosure of Invention The invention provides an optimized control system and method for recovering latent heat of steam condensate through injection phase change, which are used for solving the defects that the influence of part ageing on a system and the data integration and synergy are insufficient in the prior art. In one aspect, the invention provides an optimizing control system for recovering latent heat of steam condensate through injection phase change, comprising: The raw material parameter association module is used for collecting processing raw material data and steam condensate parameter data, analyzing the processing raw material data to obtain process dynamic parameters, and establishing association relation with the steam condensate parameter data by combining the heating requirement of the steam stripping machine. And the cooperative data integration module is used for controlling the temperature according to the pressure and the flow of the jet pump to obtain the control parameters of the jet pump, and integrating the corresponding relation between the pressure and the liquid level of the flash tank to obtain cooperative control data. The steam amount calculation module is used for analyzing the influence of the aging degree of the parts on the steam condensate parameter data to obtain a wear influence coefficient, and calculating the suction steam amount by combining the steam condensate parameter data. And the optimization scheme generation module is used for generating a control scheme according to the Uighur optimization algorithm and combining the cooperative control data, the association relation and the suction steam quantity. The invention provides an optimizing control system for injecting phase change recovery steam condensate latent heat, which comprises the following steps of: a