CN-121976028-A - Air quantity control system of annealing air cooling device

CN121976028ACN 121976028 ACN121976028 ACN 121976028ACN-121976028-A

Abstract

The invention relates to an air quantity control system of an annealing air cooling device, which belongs to the technical field of annealing devices and comprises a control module, a sensing module, an air blowing module and a heat exchange module, wherein the air blowing module comprises a fan, a first air cavity and a second air cavity, one end of the first air cavity is communicated with an air outlet end of the fan, the other end of the first air cavity is arranged towards a cooling area of the annealing air cooling device, one end of the second air cavity is communicated with the cooling area, the other end of the second air cavity is communicated with a return air end of the fan, the heat exchange module is arranged in the second air cavity and is used for cooling circulated air, the sensing module comprises a temperature sensor and a flow sensor, the temperature sensor and the flow sensor are respectively used for collecting temperature data and flow data of return air in the second air cavity and transmitting the temperature data and the flow data to the control module, and the control module respectively judges whether the temperature data and the flow data exceed preset safety thresholds or not and improves the running power of the fan when a judgment result is yes.

Inventors

LIN JUN
ZHANG YUNYUN

Assignees

广东中创炉业有限公司

Dates

Publication Date: 20260505
Application Date: 20260209

Claims (8)

1. The air quantity control system of the annealing air cooling device is characterized by comprising a control module, a sensing module, an air blowing module and a heat exchange module, wherein the air blowing module comprises a fan, a first air cavity and a second air cavity, one end of the first air cavity is communicated with an air outlet end of the fan, the other end of the first air cavity is arranged towards a cooling area of the annealing air cooling device, one end of the second air cavity is communicated with the cooling area, and the other end of the second air cavity is communicated with an air return end of the fan; The heat exchange module is arranged in the second air cavity and is used for cooling the circulating air; the control module is electrically connected with the sensing module and the heat exchange module; The sensing module comprises a temperature sensor and a flow sensor, the temperature sensor and the flow sensor are respectively used for collecting temperature data and flow data of return air in the second air cavity and transmitting the temperature data and the flow data to the control module, and the control module respectively judges whether the temperature data and the flow data exceed a preset safety threshold or not and increases the running power of the fan when the judging result is yes.
2. The air volume control system of the annealing air cooling device according to claim 1, wherein the temperature sensor and the flow sensor transmit temperature data W and flow data L to a control module, the control module corrects the fan power to P, wherein P=P0× [ k1· (W/W0) +k2· (L/L0) ], P0 is a reference power input in advance, W0 and L0 are a preset temperature threshold and a flow threshold respectively, and k1 and k2 are preset weight coefficients.
3. The system of claim 2 wherein the control module calculates a combined return air heat load value based on the received temperature data and flow data, determines whether the combined return air heat load value exceeds a threshold, and increases fan operating power if the determination is positive.
4. The air volume control system of the annealing air cooling device of claim 3, wherein the control module calculates a comprehensive return air heat load value Z according to the received temperature data and the received flow data, wherein Z=W/W0× X c, where L (t) is a function of the flow rate over time, c is a correction coefficient, t is the current time, and t0 is the initial time.
5. The air volume control system of the annealing air cooling device of claim 1, wherein the control module is further electrically connected with a return air temperature sensor, the return air temperature sensor is arranged at a return air end of the fan, the return air temperature sensor is used for monitoring return air temperature entering the fan in real time and feeding back return air temperature data to the control module, the control module judges whether the stability of the return air temperature data exceeds a threshold value or not, and the fan power is further corrected upwards when the judgment result is yes.
6. The air volume control system of an annealing air cooling device according to claim 1, wherein the control module is configured to arrange a plurality of return air temperature data uploaded sequentially in a time reverse order, and calculate a variance F of the first n return air temperature data in the time reverse order, and the control module corrects the fan power by a factor of A1, wherein A1=F/F0×d, d is a correction coefficient input in advance, and n is a value range input in advance.
7. The air volume control system of the annealing air cooling device according to claim 1, wherein the control module judges the consistency of the temperature of the steel plate in the annealing air cooling device and upwardly corrects the value of n when the consistency is lower than a threshold value.
8. The air volume control system of an annealing and air cooling device according to claim 1, further comprising a control panel, wherein the control panel is electrically connected with the control module, and the control panel is used for inputting values of P0, W0, L0, k1, k2, F0, d, n and c.

Description

Air quantity control system of annealing air cooling device Technical Field The invention belongs to the technical field of annealing devices, and particularly relates to an air quantity control system of an annealing air cooling device. Background Annealing is a key process link in the metal heat treatment process, and the main principle is to fix a structure and improve performance by rapid and uniform cooling. A general air cooling system of an annealing furnace, for example, an annealing furnace disclosed in China patent publication No. CN109487071A, comprises a front air cooling section, a rear air cooling section, a conveying mechanism and an exhaust mechanism, wherein the front air cooling section is communicated with the rear air cooling section, the conveying mechanism is communicated with the rear air cooling section and the front air cooling section and is used for conveying cold air of the rear air cooling section to the front air cooling section, and the exhaust mechanism is communicated with the front air cooling section and is used for exhausting hot air generated by the annealing furnace air cooling system. The air cooling system of the annealing furnace can improve the utilization rate of cold air and accelerate the cooling speed of the steel strip. In the circulating air path, a heat exchanger in the cavity for storing return air is a key to ensure the cooling effect of the return air. Most of the prior art is fixed power or manually regulated power, but the temperature and flow of the "hot air" from the cooling zone into the cavity storing the return air is dynamically changed in real time due to variations in the gauge (thickness, material), inlet temperature, travel speed of the cooled steel sheet, and ambient temperature fluctuations. The probability of the heat exchange power (such as constant cooling water flow) is that the fixed heat exchange power cannot be matched with the variable return air heat load in real time, the cooling is insufficient when the heat load is high, the return air temperature is higher, the fresh air temperature stability is damaged, the heat load is low, the energy is wasted, and the local supercooling in the air path can be caused to generate condensed water. Therefore, an air quantity control system of an annealing air cooling device capable of sensing return air heat load change in real time and dynamically adjusting cooling capacity is needed. Disclosure of Invention In order to solve the problems in the prior art, the invention provides an air quantity control system of an annealing air cooling device, which has the characteristic of dynamically adjusting the cooling capacity. The aim of the invention can be achieved by the following technical scheme: The air quantity control system of the annealing air cooling device comprises a control module, a sensing module, an air blowing module and a heat exchange module, wherein the air blowing module comprises a fan, a first air cavity and a second air cavity, one end of the first air cavity is communicated with an air outlet end of the fan, the other end of the first air cavity is arranged towards a cooling area of the annealing air cooling device, one end of the second air cavity is communicated with the cooling area, and the other end of the second air cavity is communicated with an air return end of the fan; The heat exchange module is arranged in the second air cavity and is used for cooling the circulating air; the control module is electrically connected with the sensing module and the heat exchange module; The sensing module comprises a temperature sensor and a flow sensor, the temperature sensor and the flow sensor are respectively used for collecting temperature data and flow data of return air in the second air cavity and transmitting the temperature data and the flow data to the control module, and the control module respectively judges whether the temperature data and the flow data exceed a preset safety threshold or not and increases the running power of the fan when the judging result is yes. As a preferable technical scheme of the invention, the temperature sensor and the flow sensor transmit temperature data W and flow data L to the control module, the control module corrects the fan power to P, wherein P=P0× [ k1· (W/W0) +k2· (L/L0) ], P0 is a reference power input in advance, W0 and L0 are respectively a preset temperature threshold and a flow threshold, and k1 and k2 are preset weight coefficients. As a preferable technical scheme of the invention, the control module calculates the comprehensive return air heat load value according to the received temperature data and flow data, judges whether the comprehensive return air heat load value exceeds a threshold value, and increases the running power of the fan when the judgment result is yes. As a preferable technical scheme of the invention, the control module calculates the comprehensive return air heat load value Z according to the received t