CN-117029515-B - Self-adaptive control system based on three-effect heat recovery smoke whitening unit

CN117029515BCN 117029515 BCN117029515 BCN 117029515BCN-117029515-B

Abstract

The invention discloses a self-adaptive control system based on a three-effect heat recovery flue gas whitening unit, which relates to the technical field of heat recovery, solves the problem of excessive flow rate waste caused by heat without analyzing different heat transfer loss conditions, confirms corresponding parameter packages according to analysis results by collecting the past parameters generated by corresponding heat exchangers and analyzing the past parameters, wherein each parameter package is provided with an optimal point position, the optimal point position corresponds to the appointed optimal heat energy parameter, and then, the section of the demand parameter is confirmed according to the corresponding demand parameter, the corresponding adaptive optimal heat energy conversion value is selected according to the section, and then, the heat energy allocation is carried out according to the adaptive optimal heat energy conversion value, so that the allocated heat energy loss is minimum, the full utilization of the waste heat energy is ensured, and the integral recovery utilization rate of the waste heat is improved.

Inventors

WANG LIJIN
CAI YONGXIANG

Assignees

南京平欧空调设备有限公司

Dates

Publication Date: 20260505
Application Date: 20230823

Claims (7)

1. Self-adaptive control system based on three-effect heat recovery flue gas whitening unit, its characterized in that includes: The waste heat recovery end is arranged in the flue gas whitening unit and is used for cooling and dehumidifying waste heat recovery heat exchange generated in the flue gas whitening process, transmitting the recovered waste heat into the outdoor fresh air heat exchange fresh air heating treatment end, absorbing fresh air cooling capacity, transmitting the fresh air cooling capacity to the waste heat recovery heat exchange end for cooling and dehumidifying, continuously recycling, and transferring part of the recovered waste heat into the heat pump or the steam generator for recycling; The heat exchange treatment end is a heat exchanger at the outdoor fresh air side of the flue gas whitening unit and is used for carrying out heat exchange, heat release and cold absorption treatment on the recovered waste heat, transferring the waste heat to the outdoor fresh air treatment, and mixing the treated fresh air with the low-temperature wet air after the waste gas treatment to achieve the whitening effect; The parameter analysis management end comprises a past parameter acquisition unit, a parameter waveform construction unit, a parameter analysis unit and a storage unit; The past parameter acquisition unit is used for acquiring the waste heat parameters transferred by the heat exchanger and the heat energy parameters received by the corresponding receiving end, wherein the corresponding receiving end is a heat pump or a steam generator, and carrying out parameter binding according to different waste heat parameters and corresponding to different heat energy parameters, and transmitting a plurality of bound different parameter packets to the parameter waveform construction unit; the parameter waveform construction unit is used for receiving the acquired plurality of parameter packets, constructing the parameter waveform according to the received parameter packets, and transmitting the constructed parameter waveform into the parameter waveform analysis unit; The parameter wave analysis unit divides the confirmed parameter wave form into a plurality of wave form sections according to a preset dividing value, confirms the best point position in each wave form section, carries out merging processing on the best point position and the section corresponding to the wave form section, confirms the merging parameter packet, and transmits the merging parameter packet to the storage unit for storage; The demand parameter confirmation end inputs the heat energy demand value confirmed by the receiving end by an operator and transmits the confirmed heat energy demand value into the control end; And the control end controls the waste heat to be transferred by the heat exchange treatment end according to the received heat energy demand value.
2. The self-adaptive control system based on the three-effect heat recovery flue gas whitening unit according to claim 1, wherein the parameter waveform construction unit constructs the parameter waveform in the following specific ways: From the parameter package, carrying out average value processing on a plurality of different heat energy parameters corresponding to the same waste heat parameter, confirming a group of average values, taking the average value as a standard corresponding value of the waste heat parameter, and taking the average value as the standard corresponding value if only one group of heat energy parameters exist; And taking the heat energy parameter as a transverse coordinate axis, taking the standard corresponding value as a vertical coordinate axis, constructing a group of two-dimensional coordinate systems, determining corresponding point positions in the two-dimensional coordinate systems according to the waste heat parameter and the standard corresponding value, connecting a plurality of corresponding point positions, confirming a parameter waveform, and transmitting the constructed parameter waveform into a parameter analysis unit.
3. The self-adaptive control system based on the three-effect heat recovery flue gas whitening unit according to claim 2, wherein the parameter analysis unit confirms the specific mode of merging parameter packets as follows: according to a preset dividing value X1, wherein X1 is a preset value, a parameter X1 is selected from an origin in a transverse coordinate axis, a section of 0-X1 is taken as a dividing section, a first group of dividing waveform sections are confirmed, then X1-2X1 is taken as a second group of dividing sections, a second group of dividing waveform sections are confirmed, and the like, and subsequent dividing waveform sections are confirmed; and confirming trend parameters among each point in each group of waveform segments, wherein trend parameters = (standard corresponding value of the next point-standard corresponding value of the previous point)/(residual heat parameter difference value of the two points), merging the points in the same trend parameters into the same trend line segment, selecting a group of line segments with the largest trend parameters from a plurality of trend line segments as a standard line segment, taking the highest point in the standard line segment as the optimal point of the waveform segment, merging different waveform segments and different optimal points, confirming merging parameter packets, and transmitting different merging parameter packets into a storage unit for storage.
4. The self-adaptive control system based on the three-effect heat recovery flue gas whitening unit according to claim 1, wherein the specific mode of the control end for controlling the waste heat to be transferred by the heat exchange processing end is as follows: Marking the received heat energy demand value as RL, comparing the RL with the combined parameter packet stored in the storage unit, confirming the waveform section of the RL, confirming the optimal point position from the waveform section, and confirming the waste heat parameter corresponding to the optimal point position; The control end directly transfers the waste heat corresponding to the waste heat parameter from the heat exchange processing end to the receiving end.
5. The self-adaptive control system based on the three-effect heat recovery flue gas whitening unit according to claim 1, further comprising a conversion parameter monitoring end, wherein the conversion parameter monitoring end comprises a monitoring waveform generating unit and a monitoring waveform analyzing unit; The monitoring waveform generating unit confirms the heat energy utilization rate of the receiving end, constructs the monitoring waveform belonging to the corresponding receiving end according to different heat energy utilization rates generated at different time points, and transmits the constructed monitoring waveform to the monitoring waveform analyzing unit.
6. The self-adaptive control system based on the three-effect heat recovery flue gas whitening unit according to claim 5, wherein the monitoring waveform analysis unit receives the monitoring waveform and analyzes the monitoring waveform, and judges whether the corresponding receiving end has the problem of abnormal heat energy conversion according to the analysis result.
7. The self-adaptive control system based on the three-effect heat recovery flue gas whitening unit according to claim 6, wherein the monitoring waveform analysis unit analyzes the monitoring waveform in the following specific ways: confirming the fluctuation points existing in the monitoring waveform, wherein trend trends of line segments at two ends of the fluctuation points are opposite, and marking the heat energy utilization rate corresponding to different fluctuation points in the monitoring waveform as LY k , wherein k represents different fluctuation points, and k=1, 2, & gt. Obtaining a difference value CZ of a plurality of adjacent fluctuation points by CZ=LY k+1 -LY k , wherein k is less than or equal to n-1, carrying out summation treatment on the plurality of difference values CZ to obtain a combination parameter, and marking the combination parameter obtained by treatment as HB; Whether HB meets HB not less than 0 is analyzed, if yes, the heat energy conversion of the receiving end is free of problems, if not, the heat energy conversion of the receiving end is problematic, an error signal is generated and transmitted to an external display end for being checked by external personnel, and corresponding measures are timely made.

Description

Self-adaptive control system based on three-effect heat recovery smoke whitening unit Technical Field The invention relates to the technical field of heat energy recovery, in particular to a self-adaptive control system of a smoke whitening unit based on three-effect heat recovery. Background The tail phenomenon exists in the coke oven flue gas after wet desulfurization and denitrification, the flue gas is required to be subjected to the flue gas whitening treatment, a large amount of heat is generated in the flue gas whitening process, the part of heat is transferred and received by the heat exchanger preferentially, the transferred heat is transmitted into the heat pump or the steam generator, and the heat pump heats the waste heat and then carries out the recycling treatment. The application of patent publication No. CN113028435A discloses a gas boiler flue gas whitening waste heat recovery system, including boiler afterbody flue, heat pipe heat exchanger, flue gas whitening tower, condenser, defroster, RO reverse osmosis water purifier, boiler afterbody flue passes through the pipe intercommunication with heat pipe heat exchanger, heat pipe heat exchanger passes through the pipe and passes through pipe and three-way valve and exhaust pipe intercommunication, is equipped with condenser and defroster in the exhaust pipe, and the condenser is located the place ahead of defroster, and the one end that the exhaust pipe deviates from flue gas whitening tower is linked together with heat pipe heat exchanger. The invention has the advantages of recovering the waste heat of the flue gas, effectively whitening the flue gas, saving energy and reducing consumption. In the heat recovery process of the flue gas whitening unit, the corresponding heat is still excessively wasted in the transfer process because the heat demand of part of stages is different and the value of the waste heat transfer corresponding to the transfer is a fixed parameter, and the control system does not analyze the loss conditions of different transferred heat, so that the heat parameters to be transferred are specifically analyzed and judged according to specific analysis results, and the excessive heat loss is avoided. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a self-adaptive control system based on a three-effect heat recovery flue gas whitening unit, which solves the problem of high energy consumption of waste flue gas whitening, and simultaneously analyzes and reasonably utilizes and adjusts and controls the different heat transfer loss conditions of a three-effect heat recovery heat exchanger, so that the problem of excessive flow rate waste of heat is caused. In order to achieve the purpose, the self-adaptive control system of the smoke whitening unit based on three-effect heat recovery comprises the following technical scheme: The waste heat recovery end is arranged in the flue gas whitening unit and is used for cooling and dehumidifying waste heat recovery heat exchange generated in the flue gas whitening process, transmitting the recovered waste heat into the outdoor fresh air heat exchange fresh air heating treatment end, absorbing fresh air cooling capacity, transmitting the fresh air cooling capacity to the waste heat recovery heat exchange end for cooling and dehumidifying, continuously recycling, and transferring part of the recovered waste heat into the heat pump or the steam generator for recycling; The heat exchange treatment end is a heat exchanger at the outdoor fresh air side of the flue gas whitening unit and is used for carrying out heat exchange, heat release and cold absorption treatment on the recovered waste heat, transferring the waste heat to the outdoor fresh air treatment, and mixing the treated fresh air with the low-temperature wet air after the waste gas treatment to achieve the whitening effect; The parameter analysis management end comprises a past parameter acquisition unit, a parameter waveform construction unit, a parameter analysis unit and a storage unit; The past parameter acquisition unit is used for acquiring the waste heat parameters transferred by the heat exchanger and the heat energy parameters received by the corresponding receiving end, wherein the corresponding receiving end is a heat pump or a steam generator, and carrying out parameter binding according to different waste heat parameters and corresponding to different heat energy parameters, and transmitting a plurality of bound different parameter packets to the parameter waveform construction unit; The parameter waveform constructing unit receives the acquired plurality of parameter packets, and constructs the parameter waveform according to the received parameter packets in the following specific modes: From the parameter package, carrying out average value processing on a plurality of different heat energy parameters corresponding to the same waste heat parameter, confirming a group of average