CN-122015517-A - Multistage heating intelligent regulation control system of lining tetrafluoro elbow heating furnace

CN122015517ACN 122015517 ACN122015517 ACN 122015517ACN-122015517-A

Abstract

The invention discloses a multistage heating intelligent regulation control system of a tetrafluoro-lined elbow heating furnace, and belongs to the technical field of heating furnace temperature control. The system comprises a heating furnace partition sensing module, a partition temperature control execution module, an intelligent regulation decision module, a safety protection module and a man-machine interaction module, wherein multiple parameters are acquired through a distributed sensing network, the position of an elbow in the furnace and the operation data of the heating furnace are obtained through filtering weighting pretreatment, a heating rate set value is dynamically compensated through a multiple temperature region cooperative scheduling unit, a regulation and control instruction is generated through a multistage cooperative PID algorithm with feedforward compensation in combination with fuzzy self-adaptive correction logic, the interlocking bidirectional regulation and control of heating and cooling of the heating furnace with the tetrafluoro elbow is realized, and a safety interlocking protection mechanism is matched. The invention solves the problems of hysteresis and overshoot of the traditional temperature control of the heating furnace lined with the tetrafluoro elbow, improves the control precision of the sintering temperature of the heating furnace lined with the tetrafluoro elbow, adapts to the sintering requirements of the tetrafluoro elbow lined with different specifications, and ensures the consistency of the sintering quality.

Inventors

CAI PINGYUAN
LI ZHIFANG
LIU YUE
DONG XIANGBING

Assignees

河北盛景管道科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260326

Claims (9)

1. A multistage heating intelligent regulation control system of lining tetrafluoro elbow heating furnace, which is characterized by comprising: The heating furnace partition sensing module is used for carrying out multi-parameter real-time acquisition and filtering weighting pretreatment on a plurality of temperature areas of the adaptive tetrafluoro elbow sintering process which are axially divided by the hearth of the tetrafluoro elbow-lined heating furnace to obtain elbow positions in the furnace and heating furnace operation data; the partition temperature control execution module is used for regulating and controlling the heating elements and the cooling executors configured in each temperature region through regulating and controlling instructions, and simultaneously carrying out multi-temperature region cooperative control based on the position of the elbow in the furnace and the state of the temperature region at the front section; The intelligent regulation decision module is used for generating regulation instructions of all temperature areas through a multi-section cooperative PID algorithm with feedforward compensation and a fuzzy self-adaptive correction logic based on the temperature of all the temperature areas; The safety protection module is used for carrying out equipment safety protection on the heating furnace lined with the tetrafluoro elbow according to the operation data of the heating furnace; and the man-machine interaction module is used for configuring and inputting sintering process temperature parameters of the tetrafluoro-lined elbow and visually displaying operation data of the heating furnace.
2. The intelligent multi-section heating regulation control system of the heating furnace lined with the tetrafluoro elbow according to claim 1, wherein the multi-parameter real-time acquisition is realized by acquiring furnace atmosphere pressure data, heating element loop running current data, multi-point temperature data of each temperature zone and axial position data of the tetrafluoro elbow lined with the furnace through a distributed sensing network, the distributed sensing network is composed of K-type thermocouples, a diffused silicon type micro-pressure sensor, a Hall current sensor and a laser ranging sensor, and at least 3K-type thermocouples are distributed in each temperature zone.
3. The multi-section heating intelligent regulation control system of the tetrafluoro-lined elbow heating furnace according to claim 2 is characterized in that the filtering weighting preprocessing process comprises the steps of respectively carrying out moving average filtering processing on furnace atmosphere pressure data, heating element loop operation current data, multi-point temperature data of each temperature zone and axial position data of the tetrafluoro-lined elbow, carrying out weighted average calculation on the multi-point temperature data of the same temperature zone after the moving average filtering processing according to the space matching degree distribution weight of a K-type thermocouple and a sintering working surface of the tetrafluoro-lined elbow, and obtaining the whole-zone temperature of each temperature zone, thereby obtaining the elbow position in the furnace and the whole-zone temperature of each temperature zone, the furnace pressure and the heating element loop operation current heating furnace operation data.
4. The multi-section heating intelligent regulation control system of the tetrafluoro-lined elbow heating furnace is characterized in that the partition temperature control execution module comprises a power regulation unit and a cooling driving unit which are configured in one-to-one correspondence with each temperature section, and a multi-temperature-section cooperative scheduling unit, wherein the power regulation unit is electrically connected with heating elements of the corresponding temperature sections and is used for regulating output power of the heating elements according to regulation and control instructions, the cooling driving unit is electrically connected with cooling executors of the corresponding temperature sections and is used for controlling opening degrees of the cooling executors according to the regulation and control instructions, and the multi-temperature-section cooperative scheduling unit is used for carrying out prepositive correction on the regulation and control instructions of the later-section temperature sections according to elbow positions in the furnace, full-section temperature and temperature rising rate data of the former-section temperature sections.
5. The intelligent multi-stage heating regulation control system for a heating furnace lined with a tetrafluoro elbow according to claim 4, wherein the pre-correction logic is to dynamically compensate a temperature rising rate set value of a temperature zone of a rear section by taking the total temperature of the temperature zone of a front section as a feedforward reference when the position of the elbow in the furnace enters the temperature zone of the rear section, and the compensation quantity of the dynamic compensation is positively correlated with a real-time temperature difference of the temperature zone of the front section and the temperature zone of the rear section and an axial moving speed of the tetrafluoro elbow in the furnace lining, so as to ensure that a sintering temperature curve of the tetrafluoro elbow in the furnace lining passing through each temperature zone is matched with a preset process temperature curve.
6. The intelligent multi-stage heating regulation control system for a tetrafluoro-lined elbow heating furnace according to claim 5, wherein the implementation process of the multi-stage cooperative PID algorithm with feedforward compensation is as follows: Determining a set value by using a compensation quantity of dynamic compensation and a preset process temperature curve of a corresponding temperature zone, calculating a temperature deviation change rate and a temperature control deviation by using the whole temperature of the temperature zone as a feedback value, and performing online self-adaptive correction on a proportional coefficient, an integral coefficient and a differential coefficient of PID operation of the temperature zone by using heating element loop operation current data, the temperature deviation change rate and the temperature control deviation of the temperature zone as inputs through fuzzy self-adaptive correction logic to obtain an optimal PID parameter combination of the temperature zone; And superposing the total temperature change rate of the front-section temperature zone of the temperature zone and the rated power parameter of the heating element as feedforward compensation quantity by taking the PID parameter combination of the temperature zone as an operation basis to generate bidirectional PID basic regulation and control output, namely a regulation and control instruction, of the temperature zone.
7. The intelligent multi-stage heating regulation control system for the tetrafluoro elbow-lined heating furnace according to claim 6, wherein the basic PID regulation output is divided into a positive heating zone and a negative cooling zone, the output value of the positive heating zone is positively correlated with the output power of the heating element of the corresponding temperature zone, the cooling actuator of the corresponding temperature zone is kept fully closed during regulation, the output absolute value of the negative cooling zone is positively correlated with the opening of the cooling actuator of the corresponding temperature zone, and the heating element of the corresponding temperature zone is kept fully closed during regulation.
8. The intelligent multi-stage heating regulation control system of the tetrafluoro-elbow-lined heating furnace according to claim 3, wherein the safety protection module immediately cuts off the power supply of all heating elements when any parameter in the heating furnace operation data exceeds a preset safety threshold value, synchronously triggers all cooling actuators to fully open and simultaneously locks the automatic operation control authority of the tetrafluoro-elbow-lined heating furnace, and generates alarm information to push to production operators.
9. The intelligent multi-stage heating regulation control system of a tetrafluoro-lined elbow heating furnace according to claim 1, wherein the sintering process temperature parameter of the tetrafluoro-lined elbow is a preset process temperature curve of each temperature zone.

Description

Multistage heating intelligent regulation control system of lining tetrafluoro elbow heating furnace Technical Field The invention relates to the technical field of heating furnace temperature control, in particular to a multistage heating intelligent regulation control system of a tetrafluoro-lined elbow heating furnace. Background The polytetrafluoroethylene-lined elbow is a core component of a fluid conveying pipeline in the industries of chemical industry, petroleum industry and the like by virtue of excellent corrosion resistance, high and low temperature resistance and fluid conveying smoothness, and the sintering forming process directly determines key performances such as bonding strength, crystallinity and the like of the product lining, so that the polytetrafluoroethylene-lined elbow is a core process for producing the polytetrafluoroethylene-lined elbow. The sintering of the polytetrafluoroethylene-lined elbow is required to complete multi-stage temperature control of preheating, heating, heat preservation and slow cooling in a hearth of the heating furnace, and the sintering temperature window of polytetrafluoroethylene materials is narrow, so that the requirements on the temperature control precision and the temperature interval cooperativity of each temperature region axially divided by the hearth are extremely high, and therefore, an intelligent temperature control system of the heating furnace becomes a key core for guaranteeing the sintering quality of the polytetrafluoroethylene-lined elbow. The existing tetrafluoro-lined elbow heating furnace mostly adopts a single-temperature-zone independent PID temperature control mode, lacks a targeted multi-temperature-zone cooperative regulation mechanism, is easy to cause temperature control lag and temperature overshoot problems when an elbow moves in a temperature zone, does not perform accurate filtering weighting pretreatment on multiple parameters such as temperature acquired by sensing, and is easy to cause temperature judgment distortion in the whole temperature zone due to single-point temperature measurement deviation, meanwhile, a heating and cooling executing mechanism does not have interlocking bidirectional regulation logic, the thermal field coupling interference of the temperature zone is difficult to eliminate, and the safety protection is only simple parameter overrun alarm and lacks linkage interlocking protection measures, so that the sintering quality consistency of the tetrafluoro-lined elbows in different specifications is poor, the defective rate is high, and the hidden trouble of equipment operation is caused, so that the production requirements of large-scale and high-precision tetrafluoro-lined elbows cannot be met. Therefore, a multi-stage heating intelligent regulation control system of a tetrafluoro-lined elbow heating furnace is provided. Disclosure of Invention The invention aims to provide a multistage heating intelligent regulation control system of a tetrafluoro-lined elbow heating furnace, which aims to solve the problems in the background technology. In order to solve the technical problems, the invention provides the following technical scheme: A multistage heating intelligent regulation control system of a tetrafluoro-lined elbow heating furnace comprises a heating furnace partition sensing module, a partition temperature control execution module, an intelligent regulation decision module, a safety protection module and a man-machine interaction module; The heating furnace partition sensing module is used for carrying out multi-parameter real-time acquisition and filtering weighting pretreatment on a plurality of temperature areas of the adaptive tetrafluoro elbow sintering process which are axially divided by the tetrafluoro elbow-lined heating furnace hearth, so as to obtain elbow positions in the furnace and heating furnace operation data; The partition temperature control execution module is used for regulating and controlling the heating elements and the cooling executors configured in each temperature region through regulating and controlling instructions, and simultaneously carrying out multi-temperature region cooperative control based on the position of the elbow in the furnace and the state of the temperature region at the front section; the intelligent regulation decision module is used for generating regulation instructions of all temperature areas through a multi-section collaborative PID algorithm with feedforward compensation and a fuzzy self-adaptive correction logic based on the temperature of all the temperature areas; The safety protection module is used for carrying out equipment safety protection on the heating furnace lined with the tetrafluoro elbow according to the operation data of the heating furnace; The man-machine interaction module is used for configuring and inputting sintering process temperature parameters of the polytetrafluoroethylene-lined elbow and visually displaying operat