Temperature regulating control device for a heat retaining apparatus
By employing a temperature regulation and control device in the process equipment, and dynamically adjusting the temperature of the insulator insulation box using T1+ΔT, the problem of condensation and dew formation in humid and dusty flue gas was solved, achieving energy-saving operation and stable control of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOSTEEL TIANCHENG ENVIRONMENTAL PROTECTION SCI&TECH
- Filing Date
- 2025-06-27
- Publication Date
- 2026-06-02
AI Technical Summary
Existing technologies cannot effectively prevent the condensation of moist and dusty flue gas in low-temperature environments, which can lead to equipment failure. They also have problems with excessively high or low energy consumption, and the control system cannot dynamically adapt to changes in flue gas temperature.
A temperature regulation and control device is adopted, which uses the temperature of the process equipment medium T1 as the base value, sets an additional temperature value ΔT, and forms T1 + ΔT as the control setpoint. The temperature T2 of the insulator insulation box is adjusted in real time to ensure that T2 - T1 = ΔT > 0℃, thereby achieving dynamic tracking and automatic adjustment.
It effectively avoids condensation and condensation, achieves energy-saving operation of the insulation equipment, reduces energy consumption, adapts to changes in process conditions, and ensures normal equipment operation.
Smart Images
Figure CN224317952U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a temperature regulation and control device for thermal insulation equipment. Background Technology
[0002] Typically, when damp and dusty flue gas enters the insulation equipment of process equipment, such as the insulation box of the insulator in a dust removal system, where the temperature is lower than the dew point temperature of the damp and dusty flue gas, condensation will form on the surface of the internal components of the insulation equipment, such as the insulation box of the insulator in a dust removal system, thus contaminating the internal components and causing them to malfunction.
[0003] To avoid such malfunctions that cause abnormal operation, insulation and heating equipment, such as electric heaters, are usually installed inside the insulation boxes of insulators in insulation equipment such as dust removal systems to increase their operating temperature. This ensures that the internal temperature T2 is higher than the dew point temperature of the medium entering the equipment, such as the humid and dusty flue gas. For example, the operating temperature T2 of the insulation box of the insulator in a dust removal system should be higher than the dew point temperature of the humid and dusty flue gas entering it. For process equipment, to prevent condensation of humid and dusty flue gas inside the process equipment such as dust removal systems, measures need to be taken to increase the flue gas temperature T1 entering the process equipment such as dust removal systems, so that T1 is higher than the dew point temperature of the humid and dusty flue gas.
[0004] To control the operating temperature T2 of insulation equipment on process equipment, such as the insulator insulation box of a dust removal system, a control setpoint or target value T2 is typically set on the insulation heating control device. This setpoint ensures that T2 is higher than the dew point temperature of the humid and dusty flue gas. The insulation heating control device uses this control setpoint to control and adjust the electric heater or other types of heating equipment of the insulation equipment, such as the insulator insulation box of the dust removal system. This ensures that the actual operating temperature T2 of the insulation equipment, such as the insulator insulation box of the dust removal system, is higher than the dew point temperature of the medium in the process equipment, such as the humid and dusty flue gas processed in the dust removal system. This prevents abnormal operation phenomena such as high-voltage leakage and creepage caused by condensation on components inside the insulator insulation box, such as through-wall magnetic bushings and support magnetic bushings.
[0005] This approach cannot effectively prevent the risk of condensation and dew formation caused by high-temperature, humid, and dusty flue gas entering a relatively low-temperature environment. Furthermore, as process conditions change during production, the T2 setting cannot accurately reflect the changes in dew point temperature caused by changes in the characteristics of the humid and dusty flue gas. An excessively high T2 setting will lead to excessive energy consumption, while an excessively low T2 setting will fail to achieve the anti-condensation effect, resulting in production operation failures.
[0006] The existing technical solution involves directly setting a control setpoint or a target value T2 for heat preservation operation on the heat preservation and heating control device. This T2 setting must be higher than the dew point temperature of the humid and dusty flue gas inside the process equipment. The heat preservation and heating control device then controls or adjusts the electric heater or other types of heating equipment / components of the heat preservation equipment on the process equipment, such as the insulator insulation box 7 of the dust removal system, according to the set control setpoint or target value T2. This raises the temperature inside the insulator insulation box 7 and maintains it at the T2 temperature value.
[0007] The premise for reliable operation of the currently known practice is that when the medium in the process equipment, such as the humid and dusty flue gas processed in the dust removal system, enters the insulator insulation box 7, the temperature of the insulator insulation box does not condense under the condition of T2, so that the surface of the equipment and components inside the insulator insulation box, such as the through-wall magnetic bushing and the support magnetic bushing, does not condense and is not contaminated by the entering humid and dusty flue gas.
[0008] The currently known practice is to directly set a control setpoint or target value T2 for the insulation operation on the insulation and heating control device as a fixed value. The insulation and heating control device then adjusts the operating temperature T2 inside the insulation equipment, such as the insulator insulation box 7 of the dust removal system, based on the control value T2. Once set, T2 will not change with the temperature of the medium being processed in the process equipment, such as the humid and dusty flue gas being processed in the dust removal system, without manual intervention from operators.
[0009] The commonly known approach can be summarized as follows: set T2, use T2 as the set value to control and adjust the target value T2, and detect and provide feedback on T2, provided that T2 is higher than the dew point temperature of the humid and dusty flue gas (this is jointly ensured by the process and control engineering).
[0010] The shortcomings of the approach taken by public intellectuals are:
[0011] 1) Changes in the physical and chemical properties of flue gas due to changes in process conditions lead to changes in the dew point temperature of the humid and dusty flue gas. The control value T2 cannot reflect the changes in the physical and chemical properties of the humid and dusty flue gas entering the insulation equipment such as the insulator insulation box 7 of the dust removal system. In particular, the changes in the dew point temperature can cause condensation and pollution of internal components of the insulator insulation box, such as through-wall magnetic bushings and support magnetic bushings, under the changed conditions of the humid and dusty flue gas, resulting in the risk of equipment malfunction.
[0012] 2) If the control value T2 is set too low, it will cause condensation of the humid and dusty flue gas entering the insulation equipment such as the insulator insulation box of the dust removal system equipment, resulting in equipment malfunction and affecting the normal operation of process equipment 3.
[0013] 3) Setting the control value T2 too high can effectively ensure the normal operation of the process equipment, but an excessively high control value T2 will cause heating equipment such as electric heaters to work excessively, consuming too much insulation energy, which is not conducive to the energy-saving operation of insulation equipment such as dust removal system equipment insulator insulation box 7 on the process equipment, and increases the operating energy consumption of process equipment 3.
[0014] 4) Once the control value T2 is set, it will not change according to the operating temperature T1 of the humid and dusty flue gas entering the insulation equipment such as the insulator insulation box of the dust removal system equipment in the process equipment without the intervention or reset of the operation management personnel. When the operating temperature T1 of the humid and dusty flue gas increases, the high temperature humid and dusty flue gas enters the relatively low temperature internal environment of the insulation equipment such as the insulator insulation box of the dust removal system equipment in the process equipment, which increases the risk of condensation of the humid and dusty flue gas in the insulator insulation box.
[0015] 5) From the perspective of automatic control of the control system, the parameter setting of the control system needs to take into account the inherent properties of the medium in the process equipment, such as the dew point temperature parameter of the dust removal system equipment for handling humid and dusty flue gas. The parameter setting of the control system requires in-depth participation of the production process professionals. Summary of the Invention
[0016] This utility model provides a temperature regulation and control device for insulation equipment to address the shortcomings of existing technologies.
[0017] The technical solution of this utility model is: a temperature regulation and control device for thermal insulation equipment, comprising a temperature regulation and control device connected to a process equipment, an insulator insulation box installed inside the process equipment, and the temperature regulation and control device connected to the insulator insulation box; the temperature regulation and control device uses the temperature T1 of the medium in the process equipment as the base value of the temperature control target value, and sets an additional temperature value ΔT on the insulator insulation box; the temperature regulation and control device uses T1 + ΔT as the control set value to control and regulate the actual operating temperature T2 of the insulator insulation box.
[0018] According to an embodiment of this utility model, the process equipment is a dust removal system.
[0019] According to an embodiment of the present invention, the dust removal system equipment is provided with a dust source point dust removal exhaust hood, a dust removal system inlet flue gas duct, and a dust collector system outlet flue gas duct; the dust removal system is connected to a dust removal system fan and a dust collector system clean flue gas emission duct.
[0020] According to an embodiment of this utility model, the insulator insulation box is provided with a through-wall magnetic sleeve, a support magnetic sleeve, a high-voltage connection lead, an electric heater, and a temperature detection element.
[0021] According to an embodiment of this utility model, a flue gas temperature detection sensor / transmitter and an insulator chamber temperature detection sensor / transmitter are respectively installed on the connection line between the temperature regulation and control device and the insulator insulation box.
[0022] A method for dynamically adjusting the target temperature control value uses the temperature T1 of the medium in the process equipment as the base value of the target temperature control value. A temperature supplementary value ΔT is set on the temperature control device of the process equipment. The sum of the medium temperature T1 and the temperature supplementary value ΔT is used as the control target value of the temperature control device of the process equipment, that is, T1 + ΔT is used as the control setpoint and the target value for heat preservation operation; ΔT is set to 0℃ to achieve T2 > T1.
[0023] The process equipment is a dust removal system, the medium is humid and dusty flue gas, and the temperature control equipment is the insulator insulation box of the dust removal system. A temperature regulation and control device is installed inside the insulator insulation box of the dust removal system. This device uses T1 + ΔT as the control setpoint to control and regulate the actual operating temperature T2 of the insulator insulation box. Under the condition T1 in the dust removal system, the humid and dusty flue gas does not condense. Therefore, condensation will not occur inside the insulator insulation box of the dust removal system under the condition T2, which is higher than T1.
[0024] The steps of the dynamic adjustment method for the target temperature control value are as follows:
[0025] (1) Real-time monitoring of the real-time flue gas temperature T1 of the dust removal system equipment for treating humid and dusty flue gas;
[0026] (2) Real-time monitoring of the operating temperature T2 of the insulation box of the insulator of the dust removal system equipment;
[0027] (3) Construct a temperature regulation and control device with the function of setting the temperature additional value ΔT;
[0028] (4) Use T1+ΔT as the control setpoint and the target value for heat preservation operation of the temperature regulation control device, so that the control target value T1+ΔT can be dynamically adjusted in real time as the flue gas temperature T1 of the humid and dusty flue gas processed in the dust removal system equipment changes;
[0029] (5) Construct a temperature regulation and control device with T1 + ΔT as the set value and T2 as the feedback value;
[0030] (6) Construct the control logic of the temperature regulation control device so that the control logic of the temperature regulation control device has the temperature control characteristics of T2-T1=ΔT>0℃.
[0031] The specific methods are as follows: 1) Real-time online monitoring of the temperature T1 of the humid and dusty flue gas processed in the process equipment, such as the dust removal system; 2) Using the real-time online monitored T1 as the control base temperature, setting a temperature supplementary value ΔT on the temperature regulation and control system / device of the insulation equipment, such as the insulator insulation box of the dust removal system, and using T1 + ΔT as the control setpoint and the target value for insulation operation; 3) The temperature control system or temperature regulation control device uses T1 + ΔT as the control setpoint to control and regulate the actual operating temperature T2 of the insulator insulation box 7; 4) This invention The invention ensures that the temperature T2 of the insulation equipment, such as the insulator insulation box of the dust removal system, is always higher than the base temperature (flue gas temperature T1) of the humid and dusty flue gas entering it by a temperature increment ΔT, thus ensuring that the humid and dusty flue gas in the insulation box of the dust removal system does not condense or form condensation; 5) The actual operating temperature T2 of the insulation equipment, such as the insulator insulation box of the dust removal system, will also follow and automatically adjust in real time according to the change of the flue gas temperature T1 of the humid and dusty flue gas.
[0032] The technical solution can be summarized as follows: detect T1, set ΔT (ΔT > 0℃), use T1 + ΔT as the set value to control and adjust the target value T2, detect and provide feedback on T2, and ensure that T2 - T1 = ΔT > 0℃, provided that T1 is higher than the dew point temperature of the humid and dusty flue gas (T1 being higher than the dew point temperature of the humid and dusty flue gas is guaranteed by the process production process).
[0033] The differences from known practices are as follows: 1) The flue gas temperature T1 of the process equipment, such as the dust removal system, which is monitored online in real time, is incorporated into the control system / device as the base temperature value for the control setpoint; 2) A temperature additional value ΔT setting channel or HMI control is provided on the temperature control system or temperature regulation control device, using T1 + ΔT as the control setpoint and the target value for heat preservation operation; 3) The temperature control system or temperature regulation control device uses T1 + ΔT as the control setpoint to control and regulate the heat preservation equipment on the process equipment, such as the electric heater or other types of heating equipment / components of the insulator insulation box of the dust removal system, to achieve the target of controlling and regulating the actual operating temperature T2 of the insulator insulation box of the dust removal system; 4) The control setpoint, the target value of heat preservation operation T1 + ΔT, and the actual operating temperature T2 of the insulation box 7 change dynamically with the change of the temperature T1 of the humid and dusty flue gas entering the process equipment, such as the dust removal system; 5) The setting of the temperature additional value ΔT is not... It is necessary to consider the dew point temperature of the humid and dusty flue gas entering the process equipment, such as the dust removal system. It is assumed that if the humid and dusty flue gas does not condense under the condition T1 in the process equipment, such as the dust removal system, there is no possibility of condensation in the insulation equipment, such as the insulator insulation box of the dust removal system, under the condition T2 which is higher than T1. Therefore, it is only necessary to satisfy ΔT>0℃; 6) When setting the temperature supplement value ΔT, under the condition that ΔT>0℃, a sufficiently small temperature supplement value ΔT can maximize the energy-saving operation of the insulation equipment, such as the insulator insulation box 7 of the dust removal system, and minimize the operating energy consumption; 7) The operating temperature T2 is detected in real time. T2 is used as a feedback control signal. If T2 is greater than T1, the temperature control characteristic of T2-T1=ΔT>0℃ is realized. This can effectively avoid the risk of condensation and dew from the relatively low temperature environment inside the insulation equipment, such as the insulator insulation box 7, where the relatively high temperature of the humid and dusty flue gas entering the process equipment, such as the dust removal system, is introduced into the relatively low temperature environment.
[0034] The temperature regulation control device differs from known heat preservation and heating control devices in the following ways: 1) It incorporates the flue gas temperature T1, which is monitored in real-time in process equipment such as dust removal systems, into the temperature regulation control device as the base temperature value for the control setpoint, thus increasing the control detection variable or parameter; 2) Instead of setting the known temperature control value T2, the temperature regulation control device sets a temperature additional value ΔT, using T1 + ΔT as the control setpoint and the target value for heat preservation operation; 3) The temperature regulation control device does not... Instead of using the commonly known T2, the control setpoint T1 + ΔT is used to control and regulate the insulation equipment on the process equipment, such as the electric heater or other types of heating equipment / components of the insulator insulation box in the dust removal system, to achieve the target control and regulation of the actual operating temperature T2 of the insulator insulation box in the dust removal system; 4) The control setpoint of the temperature regulation control device, the target value T1 + ΔT for insulation operation, and the actual operating temperature T2 of the insulation box are adjusted in real time according to the change of the flue gas temperature T1 of the humid and dusty flue gas entering the process equipment, such as the dust removal system equipment. 5) If the humid and dusty flue gas does not condense in the process equipment, such as the dust removal system equipment, under condition T1, there is no possibility of condensation in the insulation box of the insulation equipment, such as the insulator of the dust removal system equipment, under condition T2 which is higher than T1. Therefore, the setting of the temperature adjustment and control device's control parameter, temperature allowance ΔT, does not need to consider the physicochemical properties of the humid and dusty flue gas entering the process equipment, such as the dew point temperature; it only needs to satisfy ΔT > 0℃. 6) The temperature adjustment and control device can set a sufficiently small control parameter, temperature allowance ΔT. To achieve maximum energy-saving operation of insulation equipment such as insulator insulation boxes in dust removal systems and minimize operating energy consumption; 6) The temperature control characteristic of T2-T1=ΔT>0℃ achieved by the temperature regulation and control device will ensure that the ambient temperature inside the insulator insulation box 7 of the process equipment such as dust removal systems is always higher than the flue gas temperature T1 of the humid and dusty flue gas, which can effectively avoid the risk of condensation and dew formation caused by the high-temperature humid and dusty flue gas entering the process equipment such as dust removal systems and entering the low-temperature environment inside the insulator insulation box of the process equipment such as dust removal systems.
[0035] Compared to known applications where control logic is integrated into the control system (such as PLC / DCS), the differences are: 1) The flue gas temperature T1 of the wet and dusty flue gas processed in the process equipment, such as the dust removal system, is introduced into the control logic of the control system (such as PLC / DCS). This allows T1 to participate in the regulation and control of the insulation equipment on the process equipment, such as the electric heater of the insulator insulation box of the dust removal system or other types of heating equipment / components. T1 serves as the base temperature value for the setpoint of the control system (such as PLC / DCS), increasing the control and detection variables or parameters of the control system (such as PLC / DCS); 2) In the control... The control system (such as PLC / DCS) sets a non-known temperature control value T2, but instead sets a temperature additional value ΔT, using T1 + ΔT as the control setpoint and the target value for heat preservation operation; 3) The control system (such as PLC / DCS) does not use the known T2, but rather uses T1 + ΔT as the control setpoint to control and adjust the heat preservation equipment on the process equipment, such as the electric heater or other types of heating equipment / components of the insulator insulation box of the dust removal system equipment, to achieve the target of controlling and adjusting the actual operating temperature T2 of the insulator insulation box of the dust removal system equipment; 4) The control logic of the control system (such as PLC / DCS) in this invention needs to detect and monitor the process. In addition to the well-known T2, the variables / parameters also need to monitor the changes in T1, ΔT, and T1+ΔT in real time. Monitoring and operation controls are added to the HMI of the control system (such as PLC / DCS); 5) The control setpoints and target values for heat preservation operation T1+ΔT of the control system (such as PLC / DCS), as well as the actual operating temperature T2 of the heat preservation box, are dynamically adjusted in real time according to the change in the flue gas temperature T1 of the humid and dusty flue gas entering the process equipment, such as the dust removal system; 6) The setting of the control setpoints and target values for heat preservation operation T1+ΔT in the control system (such as PLC / DCS) does not need to consider the changes in the flue gas temperature T1 of the humid and dusty flue gas entering the process equipment. The physicochemical properties of the humid and dusty flue gas processed in the dust removal system, such as the dew point temperature, are considered. It is assumed that if the humid and dusty flue gas does not condense under the condition T1 in the process equipment 3 such as the dust removal system, there is no possibility of condensation in the insulation box 7 of the insulation equipment such as the dust removal system under the condition T2 which is higher than T1. Therefore, it is only necessary to set the value to satisfy ΔT>0℃; 7) In the control system (such as PLC / DCS) of the present invention, as long as the condition of ΔT>0℃ is satisfied, the temperature additional value ΔT of the control parameter can be set to a sufficiently small value to achieve the maximum energy-saving operation of the insulation equipment such as the insulation box 7 of the dust removal system and minimize the operating energy consumption.8) The control logic of the control system (such as PLC / DCS) implements the temperature control characteristic T2-T1=ΔT>0℃, ensuring that the ambient temperature inside the insulator insulation box of process equipment, such as dust removal systems, is always higher than the flue gas temperature T1 of the humid and dusty flue gas. This effectively avoids the risk of condensation caused by the high-temperature humid and dusty flue gas entering the process equipment, such as the dust removal system, entering the low-temperature environment inside the insulator insulation box of the insulation equipment.
[0036] The beneficial technical effects of this utility model are: (1) The control system or temperature regulation control device realizes that the setting of the control target value does not need to consider the inherent physical and chemical properties of the medium in the process equipment, such as the temperature of the medium containing moisture and dust, such as the dew point temperature of the dust removal system equipment for treating the medium containing moisture and dust. The setting of the control target value only requires setting ΔT>0℃, and the setting process is particularly simple and convenient.
[0037] (2) The operating temperature T2 of the insulation equipment on the process equipment, such as the insulator insulation box of the dust removal system, is also adjusted in real time according to the flue gas temperature T1 of the process equipment, such as the dust removal system, which handles humid and dusty flue gas; when T1 increases, T2 = T1 + ΔT increases accordingly, and T2 increases; when T1 decreases, T2 = T1 + ΔT decreases accordingly, and T2 also decreases accordingly; the control target value T1 + ΔT of the temperature control system or temperature regulation control device and the operating temperature T2 of the insulator insulation box of the process equipment, such as the dust removal system, are synchronously adaptively followed and automatically dynamically adjusted.
[0038] (3) The real-time adaptive automatic dynamic adjustment of the temperature regulation control value T1+ΔT and the actual operating temperature T2 can not only ensure the operation effect of the insulation and heating control of the insulation equipment such as the insulation box of the insulator of the dust removal system, effectively avoid the condensation phenomenon in the insulation equipment such as the insulation box of the insulator of the dust removal system, but also achieve maximum energy saving operation and minimize operating energy consumption.
[0039] (4) When setting up a control system or temperature regulation control device, as long as the setting satisfies ΔT>0℃, the temperature T2 of the insulation equipment such as the insulator insulation box 7 of the dust removal system equipment on the process equipment can be guaranteed to be higher than the flue gas temperature T1 of the humid and dusty flue gas by a temperature additional value ΔT. As long as the humid and dusty flue gas entering the process equipment such as the dust removal system equipment does not condense under the condition of T1, the temperature control characteristic of T2-T1=ΔT>0℃ can effectively avoid the condensation of the humid and dusty flue gas in the insulation equipment such as the insulator insulation box 7 of the dust removal system equipment on the process equipment, and also eliminate the risk of condensation of high temperature humid and dusty flue gas after entering a relatively low temperature environment from a relatively high temperature environment.
[0040] Based on the premise that as long as the moist and dusty flue gas entering the process equipment, such as the dust removal system, does not condense under condition T1, there is no possibility of condensation inside the insulation box of the insulation equipment, such as the insulator of the dust removal system, under condition T2 which is higher than T1, the implementation ensures that the operating temperature T2 inside the insulation box of the insulation equipment, such as the insulator of the dust removal system, is higher than the temperature T1 of the moist and dusty flue gas entering the process equipment, such as the dust removal system. Therefore, the moist and dusty flue gas will not condense inside the insulation box of the insulation equipment, such as the insulator of the dust removal system, under condition T2 which is higher than T1. Therefore, during the implementation process, control engineering and control-related professional operation and maintenance personnel do not need to pay attention to or consider the dew point temperature of the moist and dusty flue gas entering the process equipment when setting the control setpoint and the target value of the insulation operation. They only need to set it to meet ΔT>0℃. It also realizes the real-time adaptive following and synchronous automatic dynamic adjustment of the insulation and heating control adjustment process of the insulation equipment, such as the insulator of the dust removal system, 7 on the process equipment, according to changes in process conditions by the control system or temperature regulation control device. Attached Figure Description
[0041] Figure 1 This is a diagram of a temperature regulation and control system for a thermal insulation device.
[0042] In the diagram: 1. Dust source dust extraction and ventilation hood; 2. Inlet flue gas duct of the dust removal system; 3. Process equipment; 4. Outlet flue gas duct of the dust collector system; 5. Dust removal system fan; 6. Clean flue gas emission duct of the dust collector system; 7. Insulator insulation box; 8. Through-wall magnetic sleeve; 9. Support magnetic sleeve; 10. High-voltage connection lead; 11. Electric heater; 12. Temperature detection element; 13. Flue gas temperature detection sensor / transmitter; 14. Insulator chamber temperature detection sensor / transmitter; 15. Temperature regulation and control device. Detailed Implementation
[0043] The present invention will be further described below with reference to the accompanying drawings.
[0044] The process equipment 3 and the heat preservation equipment described in the instruction manual are shown in the accompanying drawings. Figure 1 The demonstration and explanation focuses on the insulation equipment on dust collectors or electrostatic precipitators and process equipment 3, such as the insulation box 7 of the insulator for dust removal system equipment.
[0045] A temperature regulation and control device for thermal insulation equipment includes a temperature regulation and control device 15, which is connected to a process equipment 3. An insulator insulation box 7 is installed inside the process equipment 3, and the temperature regulation and control device 15 is connected to the insulator insulation box. The temperature regulation and control device 15 uses the temperature T1 of the medium in the process equipment 3 as the base value of the temperature control target value, and sets an additional temperature value ΔT on the insulator insulation box 7. The temperature regulation and control device 15 uses T1 + ΔT as the control setpoint to control and regulate the actual operating temperature T2 of the insulator insulation box 7.
[0046] The dust removal system equipment is equipped with a dust source point dust extraction and ventilation sealed hood 1, a dust removal system inlet flue gas duct 2, and a dust collector system outlet flue gas duct 4; the dust removal system is connected to a dust removal system fan 5 and a dust collector system clean flue gas emission duct 6.
[0047] The insulator insulation box 7 is equipped with a through-wall magnetic sleeve 8, a support magnetic sleeve 9, a high-voltage connection lead 10, an electric heater 11, and a temperature detection element 12.
[0048] The temperature regulation and control device 15 and the insulator insulation box 7 are respectively equipped with a flue gas temperature detection sensor / transmitter 13 and an insulator chamber temperature detection sensor / transmitter 14.
[0049] The flue gas temperature T1 of the humid and dusty flue gas in process equipment 3 is introduced and used as the base value of the target value of the temperature control system, such as the flue gas temperature T1 of the humid and dusty flue gas processed in the dust removal system of process equipment 3; a temperature additional value ΔT is set on the temperature regulation and control device 15, and it is ensured that ΔT > 0℃ when ΔT is set; the temperature regulation and control device 15 performs a summation operation on the flue gas temperature T1 of the humid and dusty flue gas and the temperature additional value ΔT to obtain T1 + ΔT. T1 + ΔT will dynamically adjust in real time according to the fluctuation of the flue gas temperature T1 of the humid and dusty flue gas in process equipment 3; the temperature regulation and control system 15 will use T1 + ΔT as the control setpoint and the target value for heat preservation operation; a temperature control system or temperature regulation and control device 15 will be constructed, and the control system or temperature regulation and control device 15 will also detect the actual operating temperature T2 of the heat preservation equipment on process equipment 3, such as the insulator insulation box 7 of the dust removal system, and use T2 as the feedback control signal; the control logic of the control system or temperature regulation and control device 15 will be constructed so that T2 - T1 = ΔT > The temperature control characteristic of 0℃; the regulation function of the control system or temperature regulation control device 15 regulates and controls the electric heater 11 or other types of heating equipment / components of the insulation equipment such as the insulator insulation box 7 of the dust removal system equipment on the process equipment 3 according to the temperature control characteristic of T2-T1=ΔT>0℃; the actual operating temperature T2 of the insulation equipment such as the insulator insulation box 7 of the dust removal system equipment on the process equipment 3 will also achieve the temperature characteristic of T2-T1=ΔT>0℃ with the fluctuation of the flue gas temperature T1 of the humid and dusty flue gas in the process equipment 3, and obtain the temperature control effect of real-time automatic tracking and real-time automatic dynamic adjustment.
[0050] As per the instruction manual Figure 1 The following are demonstrated: 1) The control target value T1 + ΔT of the insulation equipment on process equipment 3, such as the insulator insulation box 7 of the dust removal system, is achieved by real-time tracking and automatic dynamic adjustment according to the fluctuation of the flue gas temperature T1 of the humid and dusty flue gas in process equipment 3; 2) The temperature control characteristics of real-time tracking and automatic dynamic adjustment of T2 - T1 = ΔT > 0℃ possessed by the control system or temperature adjustment control device 15; 3) The real-time tracking and automatic dynamic adjustment of the electric heater 11 or other types of heating equipment / components of the insulation equipment on process equipment 3, such as the insulator insulation box 7 of the dust removal system, by the control system or temperature adjustment control device 15; and 4) The actual operating temperature T2 inside the insulation equipment on process equipment 3, such as the insulator insulation box 7 of the dust removal system, reaches a temperature characteristic of ΔT > 0℃ higher than the flue gas temperature T1 of the humid and dusty flue gas processed in process equipment 3, such as the dust removal system, thus achieving real-time tracking and automatic dynamic adjustment.
[0051] One of the key technical features is that the flue gas temperature T1 of the moist and dusty flue gas processed in the process equipment 3, such as the dust removal system, is incorporated into the control system / device as the base temperature value for the control setpoint. The control characteristics of the temperature control system or temperature regulation control device 15 fully reflect the changes in the real-time temperature characteristics of the moist and dusty flue gas processed in the process equipment 3, such as the dust removal system. Regardless of how the flue gas temperature T1 of the moist and dusty flue gas processed in the process equipment 3, such as the dust removal system, changes, T1, as the base temperature value for the control setpoint, will change with the fluctuation of the flue gas temperature T1. The variable of the base temperature value T1 as the control setpoint achieves real-time tracking and automatic dynamic adjustment of the flue gas temperature T1 of the moist and dusty flue gas processed in the process equipment 3, such as the dust removal system.
[0052] The second key technical feature is that, based on the fact that if the humid and dusty flue gas does not condense under condition T1 in the process equipment 3, such as the dust removal system equipment, there is no possibility of condensation inside the insulation box 7 of the insulation equipment, such as the dust removal system equipment, under condition T2 which is higher than T1, when setting a temperature additional value ΔT on the temperature control system or temperature regulation control device 15 of the present invention, it is only necessary to set it to satisfy ΔT > 0℃. The temperature control system or temperature regulation control device 15 will ensure that the operating temperature T2 inside the insulation box 7 of the insulation equipment, such as the dust removal system equipment, on the process equipment 3 is higher than the flue gas temperature T1 of the humid and dusty flue gas entering the process equipment 3, such as the dust removal system equipment, by a temperature additional value ΔT, thus ensuring that the inside of the insulation box 7 is a high-temperature environment relative to temperature T1.
[0053] The third key technical feature is that the temperature control system or temperature regulation control device 15 uses T1+ΔT as the control setpoint. The control setpoint T1+ΔT also changes with the temperature T1 of the humid and dusty flue gas entering the process equipment 3, such as the dust removal system equipment, thus realizing real-time tracking and automatic dynamic adjustment with T1.
[0054] Fourth key technical feature: After implementation, the actual operating temperature T2 inside the insulation box 7 of the insulator in the process equipment 3, such as the dust removal system equipment, dynamically follows the change of the flue gas temperature T1 of the humid and dusty flue gas entering the process equipment 3, such as the dust removal system equipment. This achieves real-time tracking and automatic dynamic adjustment of the actual operating temperature T2 inside the insulation box 7 of the insulator in the process equipment 3, such as the dust removal system equipment.
[0055] Fifth key technical feature: The implementation achieves a higher operating temperature T2 inside the insulation equipment (such as the insulator insulation box 7 of the dust removal system equipment) on process equipment 3 than the flue gas temperature T1 of the humid and dusty flue gas entering process equipment 3 (such as the dust removal system equipment). As long as the humid and dusty flue gas entering process equipment 3 (such as the dust removal system equipment) does not condense under the condition of T1, there will be no possibility of condensation inside the insulation equipment (such as the insulator insulation box 7 of the dust removal system equipment) under the condition of T2, which is higher than T1. Therefore, when setting the control setpoint and the target value of insulation operation during implementation, only the temperature supplement ΔT needs to be set. Moreover, when setting the temperature supplement ΔT, there is no need to pay attention to or consider the dew point temperature parameter of the humid and dusty flue gas entering process equipment 3. It is only necessary to set ΔT > 0℃, which is particularly simple and convenient.
[0056] Sixth key technical feature: When the temperature allowance ΔT is set to satisfy ΔT > 0℃, a sufficiently small temperature allowance ΔT setting can reduce the excessively high operating temperature T2 inside the insulation equipment such as the insulator insulation box 7 of the dust removal system equipment on the process equipment 3, thereby reducing unnecessary energy consumption caused by excessively high T2. This enables the insulation equipment such as the insulator insulation box 7 of the dust removal system equipment on the process equipment 3 to maximize energy saving under anti-condensation and dew-reduction operating conditions, and minimize operating energy consumption.
[0057] This temperature control system or temperature regulation control device 15 adopts the temperature control characteristic of T2-T1=ΔT>0℃. This temperature control characteristic can not only effectively avoid the condensation phenomenon in the insulation box 7 of the insulator of the insulation equipment such as the dust removal system equipment on the process equipment 3, but also effectively avoid the risk of condensation when the high-temperature humid and dusty flue gas processed in the process equipment 3, such as the dust removal system equipment, enters the low-temperature environment in the insulation box 7 of the insulation equipment such as the dust removal system equipment.
[0058] The implementation of this technical solution also has the beneficial effect of not significantly increasing the cost of the entire production process control system. Firstly, the detection of the operating temperature T1 of the humid and dusty flue gas entering the process equipment 3 (such as the dust removal system equipment) and the operating temperature T2 of the insulation equipment on the process equipment 3 (such as the insulator insulation box 7 of the dust removal system equipment) is generally a standard configuration of the process production control system, without increasing the cost of the monitoring instruments and control facilities for the entire process control system. Secondly, for implementation processes using integrated control systems (such as PLC / DCS), the upgrade or modification task is simply to upgrade the control logic of the control system according to the control logic disclosed in this invention, only adding the setting and display controls for the additional value ΔT to components such as the HMI of the control system (such as PLC / DCS). Thirdly, for implementation processes using the temperature regulation control device 15, the temperature regulation control device 15 only adds a detection input channel when introducing the temperature T1 parameter of the humid and dusty flue gas entering the process equipment 3 (such as the dust removal system equipment), and the upgrade of the control logic will not increase the hardware cost of the temperature regulation control device 15.
[0059] When implemented using a method integrated into a control system (such as a PLC / DCS), 1) the operating temperature T2 signal of the humid and dusty flue gas processed in the process equipment 3, such as the dust removal system equipment, and the insulation equipment on the process equipment 3, such as the insulator insulation box 7 of the dust removal system equipment, is directly input into the IO channel of the electronic components or control unit of the control system (such as a PLC / DCS); 2) a temperature additional value ΔT monitoring control is set on the HMI of the control system (such as a PLC / DCS); 3) the control system (such as a PLC / DCS) implements the control logic disclosed in this invention; 4) the IO channel of the electronic components or control unit of the control system (such as a PLC / DCS) outputs control signals to regulate and control the electric heater 11 or other types of heating equipment / components of the insulation equipment on the process equipment 3, such as the insulator insulation box 7 of the dust removal system equipment.
[0060] The temperature regulation control device 15 can use P, PI, PD, or PID controllers as needed. When the control accuracy requirement is not high, a comparator can be used to perform simple on-off control. The temperature regulation control device / system 15 also has a communication interface for communicating with the upper-level system control and device. The temperature regulation control device / system 15 has the function of setting the temperature additional value ΔT and a control communication interface for external setting.
[0061] T1 and ΔT are added by the adder of the temperature control device 15 to obtain T1 + ΔT; T1 + ΔT serves as the given signal for the temperature control device 15's controller; T2 serves as the feedback control signal for the temperature control device 15's controller; T1 + ΔT - T2 serves as the input signal for the temperature control device 15's controller; the controller employs a negative feedback control strategy; the temperature control device 15's controller can also use a comparator to perform simple on / off control; the temperature control device 15 performs the regulation control function for the electric heater 11.
[0062] For T1, the process system will ensure that T1 meets the requirement that T1 > the dew point temperature of the flue gas. Therefore, when setting the temperature supplement ΔT, 1) the temperature control objective is to ensure that the temperature T2 inside the insulator insulation box is not lower than the dew point temperature of the flue gas entering the dust collector, and to leave an appropriate safety margin. Therefore, under the condition that T1 > the dew point temperature of the flue gas, it is sufficient to set ΔT > 0℃; 2) under the condition that ΔT > 0℃, from the perspective of energy saving, the minimum value of ΔT should be taken.
Claims
1. A temperature regulating control device for a temperature maintaining apparatus, characterized by The device includes a temperature regulation and control device (15), which is connected to the process equipment (3). An insulator insulation box (7) is installed inside the process equipment (3). The temperature regulation and control device (15) is connected to the insulator insulation box (7). The temperature regulation and control device (15) uses the temperature T1 of the medium in the process equipment (3) as the base value of the temperature control target value. An additional temperature value ΔT is set on the insulator insulation box (7). The temperature regulation and control device (15) uses T1 + ΔT as the control set value to control and regulate the actual operating temperature T2 of the insulator insulation box (7).
2. A temperature regulating control device for a holding apparatus according to claim 1, wherein The process equipment (3) is a dust removal system.
3. A temperature regulating control device for a holding apparatus according to claim 2, wherein The dust removal system equipment is equipped with a dust source point dust removal exhaust hood (1), a dust removal system inlet flue gas duct (2), and a dust collector system outlet flue gas duct (4); the dust removal system is connected to a dust removal system fan (5) and a dust collector system clean flue gas emission duct (6).
4. The temperature regulating control device for a holding apparatus according to claim 2, wherein The insulator insulation box (7) is equipped with a through-wall magnetic sleeve (8), a support magnetic sleeve (9), a high-voltage connection lead (10), an electric heater (11), and a temperature detection element (12).
5. The temperature regulating control device for a holding apparatus according to claim 2, wherein A flue gas temperature sensor / transmitter (13) and an insulator chamber temperature sensor / transmitter (14) are respectively installed on the connection line between the temperature regulation and control device (15) and the insulator insulation box (7).