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A kind of automatic control method and system for calcining and feeding gypsum powder
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A technology of gypsum powder and calcination, which is applied in general control system, control/regulation system, program control, etc.
Active Publication Date: 2021-03-09
BEIJING NEW BUILDING MATERIALS PLC +1
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[0003]
The present invention aims to solve the problems described above
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Embodiment 1
[0035] figure 1 It is a flow chart showing an automatic control method for calcination of gypsum powder according to Embodiment 1 of the present invention. refer to figure 1 , the method includes:
[0036] Step 101, setting the target temperature of the discharge port of the calcining device and the first temperature range based on the target temperature;
[0037] Step 102, obtain the real-time temperature of the discharge port of the calcining device, and when the real-time temperature is greater than the upper limit of the first temperature range or less than the lower limit of the first temperature range, perform proportional integral differential PID on the difference between the real-time temperature and the target temperature Output control signal after operation;
[0038] Step 103, sending the control signal to the feeding device.
[0039] The above-mentioned control signal is a current signal, and a standard 4-20mA current is usually used.
[0040] For example, se...
Embodiment 2
[0042] figure 2 It is a flow chart showing the automatic control method for calcination of gypsum powder according to Embodiment 2 of the present invention. refer to figure 2 , the method includes:
[0043] Step 201, establishing a linear correspondence between the control signal and the amount of material delivered to the calcination device;
[0044] Step 202, receiving a control signal sent by the controller, and adjusting the amount of material delivered to the calcining device according to the control signal.
[0045] In the above step 201, adjust the linear correspondence between the control signal and the amount of material delivered to the calcination device, so that the maximum and minimum values of the temperature change at the outlet of the calcination device caused by changing the amount of material delivered to the calcination device according to the linear correspondence The range in between includes a first temperature range based on the target temperature...
Embodiment 3
[0049] image 3 is a schematic structural diagram of the controller provided according to Embodiment 3 of the present invention. refer to image 3 , the controller includes:
[0050] A temperature setting module 301, configured to set the target temperature of the outlet of the calcination device and the first temperature range based on the target temperature;
[0051] A temperature acquisition module 302, configured to acquire the real-time temperature of the outlet of the calcining device;
[0052]Calculation module 303, for when the real-time temperature is greater than the upper limit value of the first temperature range or less than the lower limit value of the first temperature range, the difference between the real-time temperature and the target temperature is subjected to proportional integral differential PID calculation and then outputs a control signal;
[0053] The sending module 304 is used to send the control signal to the feeding device.
[0054] The above-...
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Abstract
The invention discloses a method and system for automatically controlling calcining feeding of gypsumpowder. The method comprises the following steps that: a target temperature of a discharge port ofa calcining device and a first temperature range based on the target temperature are set; a real-time temperature of the discharge port of the calcining device is obtained; when the real-time temperature is greater than the upper limit value of the first temperature range or less than the lower limit value of the first temperature range, proportional-integral differential PID operation is carriedout on the difference between the real-time temperature and the target temperature and then a control signal is outputted; and the control signal is sent to a feeding device. According to the automatic control method and system, the target temperature of the discharge port of the calcining device can be set and the material amount conveyed by the feeding device to the calcining device is adjustedbased on the difference value between the target temperature and the collected real-time temperature of the discharge port of the calcining device, so that the material amount conveyed to the calcining device is controlled automatically and the temperature of the discharge port of the calcining device is kept to be within a set range.
Description
technical field [0001] The invention relates to the field of gypsum board production, in particular to an automatic control method and system for calcining and feeding gypsumpowder. Background technique [0002] In the production process of gypsum board, gypsum powder needs to be calcined. During the calcination process of gypsum powder, the calcined gypsum powder is directly and automatically sent to the electrostatic precipitator, so the gypsum in the gypsum calciner is continuously reduced, and it needs to be continuously poured into it. Add plaster. If the amount of gypsum added is small, the outlet temperature of the calciner will increase; if the amount of gypsum added is large, the outlet temperature of the calciner will decrease. The temperature at the outlet of the calcination device directly marks whether the calcination of gypsum powder meets the process requirements. In the prior art, the operator manually adjusts the amount of raw gypsum to stabilize the temp...
Claims
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Application Information
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