Dynamic adjustment method for temperature control target value

Abstract

The invention discloses a method for dynamically adjusting a temperature control target value. The temperature T1 of a medium in process equipment (3) is used as a basic value of a temperature control target value, a temperature additional value delta T is arranged on temperature control equipment on the process equipment (3), and the temperature T1 of the medium and the temperature additional value delta T are added to form a control target value of the temperature control equipment on the process equipment (3). T1 + delta T is used as a control set value and a target value of heat preservation operation; delta T is set to be larger than 0 DEG C, and T2 is larger than T1. According to the method, the setting process is particularly simple and convenient, the condensation phenomenon in an insulator heat preservation box of heat preservation equipment such as dust removal system equipment is effectively avoided, maximum energy-saving operation can be achieved, and operation energy consumption is reduced to the maximum extent.

Description

Technical Field

[0001] The present invention relates to a method for controlling heat preservation and heating of heat preservation equipment, and in particular to a method for dynamically adjusting a temperature control target value. Background Art

[0002] Generally, when wet dusty flue gas enters the low-temperature environment below the dew point temperature of the wet dusty flue gas in the insulation equipment on the process equipment, such as the insulation box of the insulator of the dust removal system equipment, the wet dusty flue gas will form condensation on the surface of the internal components of the insulation equipment, such as the insulation box of the insulator of the dust removal system equipment, and contaminate the internal components of such equipment, causing operational failures of these components.

[0003] In order to avoid such fault phenomena that lead to abnormal operation, insulation and heating equipment, such as electric heaters, are usually installed in insulation equipment, such as the insulation box of the dust removal system equipment, to increase its operating temperature so that its internal temperature T2 is higher than the dew point temperature of the medium entering such equipment, such as the wet dust-containing flue gas, such as making the operating temperature T2 of the insulation box of the dust removal system equipment higher than the dew point temperature of the wet dust-containing flue gas entering it; for process equipment, in order to avoid condensation of wet dust-containing flue gas inside process equipment such as dust removal system equipment, measures need to be taken to increase the flue gas temperature T1 of the wet dust-containing flue gas entering the process equipment, such as the dust removal system equipment, so that T1 is higher than the dew point temperature of the wet dust-containing flue gas.

[0004] In order to control the operating temperature T2 of the insulation equipment on the process equipment, such as the insulator insulation box of the dust removal system equipment, a control set value or insulation operation target value T2 is generally set on the insulation heating control device, and T2 is set to be higher than the dew point temperature of the wet dust-containing flue gas. The insulation heating control device controls and adjusts the insulation equipment on the process equipment, such as the electric heater or other type of heating equipment of the insulator insulation box of the dust removal system equipment, with the control set value, to ensure that the actual operating temperature T2 of the insulation equipment on the process equipment, such as the insulator insulation box of the dust removal system equipment, is higher than the dew point temperature of the medium in the process equipment, such as the wet dust-containing flue gas processed in the dust removal system, thereby avoiding the abnormal operation phenomenon of high-voltage leakage and creepage caused by the lack of condensation to form pollution on the components in the insulator insulation box, such as the wall-penetrating magnetic bushings and the support magnetic bushings.

[0005] This approach cannot effectively avoid the risk of condensation and dew formation in the wet dusty flue gas when the high-temperature wet dusty flue gas enters a relatively low-temperature environment; moreover, as the process conditions change during the production process, the set value of T2 cannot accurately reflect the changes in dew point temperature caused by changes in the characteristics of the wet dusty flue gas. A too high T2 set value will lead to excessive energy consumption, and a too low T2 set value will result in failure to achieve the anti-condensation effect and cause production operation failures.

[0006] The existing technical solution is to directly set a control setpoint or a target value T2 for insulation operation on the insulation and heating control device, and the setting of T2 must be higher than the dew point temperature of the wet and dusty flue gas in the process equipment. The insulation and heating control device controls or adjusts the insulation equipment on the process equipment, such as the electric heater or other type of heating equipment / component of the dust removal system insulator insulation box 7, based on the set control setpoint or target value T2 for insulation operation, to increase the temperature inside the insulation equipment, such as the dust removal system insulator insulation box 7, and maintain the temperature inside the insulator insulation box at the temperature value T2.

[0007] The premise for the reliable operation of the currently known practices is that when the medium in the process equipment, such as the wet and dusty flue gas treated 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, and does not cause condensation on the surface of the equipment and components in the insulator insulation box, such as the wall-penetrating magnetic sleeves and the support magnetic sleeves, and is not contaminated by the entering wet and dusty flue gas.

[0008] A commonly used approach is to directly set a fixed control setpoint or target value T2 for insulation operation on the insulation and heating control device. The insulation and heating control device then uses this setpoint T2 as a target to regulate the operating temperature T2 of insulation equipment within the process equipment, such as the insulator insulation box of a dust removal system. Once set, T2 remains constant without operator intervention, regardless of the temperature of the medium being processed within the process equipment, such as the wet and dusty flue gas being processed in the dust removal system.

[0009] The known practice can be summarized as follows: set T2, use T2 as the set value to control the target value T2, detect and feedback T2, provided that T2 is higher than the dew point temperature of the wet and dusty flue gas, which is jointly guaranteed by the process and control engineering.

[0010] The shortcomings of the known methods are: 1) Changes in process conditions and the physical and chemical properties of flue gas lead to changes in the dew point temperature of wet and dusty flue gas. The control value T2 cannot reflect the changes in the physical and chemical properties of wet and dusty flue gas entering the insulation equipment of the process equipment, such as the insulator insulation box of the dust removal system equipment, especially the changes in the dew point temperature. This may cause condensation contamination of internal components of the insulator insulation box, such as the wall magnetic bushings and the support magnetic bushings, under the changed conditions of wet and dusty flue gas, resulting in the risk of equipment operation failure; 2) If the control value T2 is set too low, it will cause condensation of wet and dusty flue gas entering the insulation equipment on the process equipment, such as the insulation box of the insulator of the dust removal system equipment, causing equipment failure and affecting the normal operation of process equipment 3; 3) The control value T2 is set too high. Although it can effectively ensure the normal operation of the process equipment, it will cause heating equipment such as electric heaters to overwork, consume too much insulation energy, and be detrimental to the energy-saving operation of insulation equipment on the process equipment, such as the dust removal system equipment insulator insulation box, and increase the operating energy consumption of process equipment 3; 4) After the control value T2 is set, it will not change according to the operating temperature T1 of the wet dusty flue gas entering the insulation equipment on the process equipment, such as the insulator insulation box of the dust removal system equipment, without intervention or reset by the operation management personnel. When the operating temperature T1 of the wet dusty flue gas increases, the high-temperature wet dusty flue gas enters the internal environment of the insulation equipment on the process equipment, such as the insulator insulation box of the dust removal system equipment, which has a relatively low temperature, increasing the risk of condensation of the wet dusty flue gas in the insulator insulation box; 5) From the perspective of automatic control of the control system, the control system parameter setting 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 processing wet and dusty flue gas. The control system parameter setting requires in-depth participation of production process professionals. Summary of the Invention

[0011] The present invention aims to solve the deficiencies in the prior art and provides a method for dynamically adjusting a temperature control target value.

[0012] The technical solution of the present invention is: a method for dynamically adjusting the temperature control target value, using the temperature T1 of the medium in the process equipment as the basic value of the temperature control target value, setting a temperature additional value ΔT on the temperature control device of the process equipment, and adding the temperature T1 of the medium and the temperature additional value ΔT to form a sum as the control target value of the temperature control device on the process equipment, that is, T1+ΔT as the control setting value and the target value of the insulation operation; setting ΔT>0℃ to achieve T2>T1.

[0013] According to an embodiment of the present invention, the process equipment is a dust removal system, the medium is wet dust-laden flue gas, and the temperature control device is an insulator insulation box of the dust removal system. A temperature adjustment control device is provided in the insulator insulation box of the dust removal system, and the temperature adjustment control device uses T1+ΔT as a control set value to control and adjust the actual operating temperature T2 of the insulator insulation box 7. The wet dust-laden flue gas does not condense under the condition T1 in the dust removal system. Therefore, condensation will not occur in the insulator insulation box of the dust removal system under the condition T2, which is higher than T1.

[0014] According to an embodiment of the present invention, the steps of the method for dynamically adjusting the temperature control target value are: (1) Real-time detection of the real-time flue gas temperature T1 of the wet and dusty flue gas processed in the dust removal system equipment; (2) Real-time detection of the operating temperature T2 of the insulator insulation box of the dust removal system equipment; (3) Construct a temperature control device with the function of setting the temperature added value ΔT; (4) T1+ΔT is used as the control set value of the temperature control device and the target value of the heat preservation operation, so that the control target value T1+ΔT can be followed and dynamically adjusted in real time as the flue gas temperature T1 of the wet dust-containing flue gas processed in the dust removal system equipment changes; (5) Construct a temperature control device with T1 + ΔT as the set value and T2 as the feedback value; (6) Construct the control logic of the temperature control device so that the control logic of the temperature control device has the temperature control characteristic of completing T2-T1=ΔT>0℃.

[0015] The functions, advantages and features described in this invention are realized from the perspective of specific technical solutions, engineering and product implementation.

[0016] The specific method of the present invention is as follows: 1) the present invention detects changes in the flue gas temperature T1 of wet and dusty flue gas processed in process equipment such as dust removal system equipment in real time online; 2) using the real-time online detected T1 as the control base temperature, a temperature additional value ΔT is set on the temperature control system / device of the insulation equipment on the process equipment, such as the insulator insulation box of the dust removal system equipment, and T1+ΔT is used as the control set value and the target value of the insulation operation; 3) the temperature control system or temperature control device controls and adjusts the actual operating temperature T2 of the insulator insulation box using T1+ΔT as the control set value; 4 ) The present invention will ensure that the temperature T2 of the insulation equipment on the process equipment, such as the insulation box of the insulator of the dust removal system equipment, is always higher than the basic temperature of the wet dust-containing flue gas (flue gas temperature T1) entering therein by a temperature additional value ΔT, ensuring that the wet dust-containing flue gas in the insulation equipment on the process equipment, such as the insulation box of the insulator of the dust removal system equipment, does not condense or generate dew; 5) The actual operating temperature T2 in the insulation equipment on the process equipment of the present invention, such as the insulation box of the insulator of the dust removal system equipment, will also follow the changes of the flue gas temperature T1 of the wet dust-containing flue gas in real time and automatically and dynamically adjust the changing situation.

[0017] The technical solution of the present invention is summarized as follows: detecting T1, setting ΔT (ΔT>0°C), controlling the target value T2 with T1+ΔT as the set value, detecting and feeding back T2, and ensuring that T2-T1=ΔT>0°C, provided that T1 is higher than the dew point temperature of the wet and dusty flue gas, and T1 being higher than the dew point temperature of the wet and dusty flue gas is guaranteed by the process production process.

[0018] The present invention is different from the known practices in that: 1) the present invention incorporates the flue gas temperature T1 of the wet dust-containing flue gas processed in the process equipment such as the dust removal system equipment, which is detected in real time online, into the control system / device as the basic temperature value of the control set value; 2) the temperature control system or temperature adjustment control device of the present invention is provided with a setting channel or HMI control of the temperature additional value ΔT, and uses T1+ΔT as the control set value and the target value of the insulation operation; 3) the temperature control system or temperature adjustment control device of the present invention uses T1+ΔT as the control set value to control and adjust the insulation 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, so as to achieve the goal of controlling and adjusting the actual operating temperature T2 of the insulator insulation box of the dust removal system equipment; 4) the control set value and the target value T1+ΔT of the insulation operation and the actual operating temperature T2 of the insulation box 7 of the present invention change dynamically with the change of the temperature T1 of the wet dust-containing flue gas processed in the process equipment such as the dust removal system equipment; 5) the temperature additional value of the present invention is provided with a setting channel or HMI control of the temperature additional value ΔT The setting of the additional value ΔT does not need to consider the dew point temperature of the wet dusty flue gas entering the process equipment such as the dust removal system equipment for treatment. It is believed that if the wet dusty flue gas does not condense under the condition of T1 in the process equipment such as the dust removal system equipment, there will be no possibility of condensation in the insulation equipment such as the dust removal system equipment insulator insulation box under the condition of T2 higher than T1, so it is only necessary to meet ΔT>0℃; 6) In the present invention, when setting the temperature additional value ΔT, under the condition of meeting ΔT>0℃, a sufficiently small setting value of the temperature additional value ΔT can achieve process The heat preservation equipment on the equipment, such as the dust removal system equipment insulator insulation box 7, maximizes energy-saving operation and minimizes operating energy consumption; 7) The present invention detects the operating temperature T2 in real time, and T2 is used as a feedback control signal to meet T2 greater than T1, realizing the temperature control characteristic of T2-T1=ΔT>0℃, which can effectively avoid the relatively high temperature wet and dusty flue gas entering the process equipment, such as the dust removal system equipment, and entering the relatively low temperature environment such as the dust removal system equipment insulator insulation box 7 to generate condensation and dew risk.

[0019] The difference between the temperature regulating control device provided by the present invention and the known heat preservation and heating control device is that: 1) the present invention introduces the flue gas temperature T1 of the wet dust-containing flue gas processed in the process equipment such as the dust removal system equipment in real time online detection into the temperature regulating control device as the basic temperature value of the control set value, and the added temperature regulating control device controls the detection variable or parameter; 2) the temperature regulating control device of the present invention sets a non-known temperature control value T2, but sets a temperature additional value ΔT, and uses T1+ΔT as the control set value and the target value of the heat preservation operation; 3) the temperature regulating control device of the present invention sets a non-known temperature control value T2, and sets a temperature additional value ΔT, and uses T1+ΔT as the control set value and the target value of the heat preservation operation; The control device is not based on the well-known T2 but on the present invention, which uses T1+ΔT as the control set value to control and adjust the insulation equipment on the process equipment, such as the electric heater of the dust removal system equipment insulator insulation box or other types of heating equipment / components to achieve the goal of controlling and adjusting the actual operating temperature T2 of the dust removal system equipment insulator insulation box; 4) The control set value of the temperature adjustment control device 15 of the present invention and the target value T1+ΔT of the insulation operation and the actual operating temperature T2 of the insulation box are realized as the flue gas temperature T1 of the wet dust-containing flue gas entering the process equipment, such as the dust removal system equipment, changes. In reality, it follows and automatically adjusts dynamically; 5) The present invention believes that if the wet dust-containing flue gas does not condense under the condition of T1 in the process equipment 3, such as the dust removal system equipment, there will be no possibility of condensation in the insulation equipment, such as the dust removal system equipment insulator insulation box, under the condition of T2 higher than T1. Therefore, the setting of the control parameter temperature additional value ΔT of the temperature control device 15 does not need to consider the physical and chemical properties of the wet dust-containing flue gas entering the process equipment 3, such as the dust removal system equipment for treatment, such as the dew point temperature, and only needs to meet ΔT>0℃; 6) The sufficiently small control parameter temperature additional value ΔT of the temperature control device of the present invention The T setting can achieve maximum energy-saving operation of insulation equipment such as the insulator insulation box 7 of the dust removal system equipment, and minimize operating energy consumption; 6) The temperature control characteristic of T2-T1=ΔT>0℃ achieved by the temperature adjustment control device provided by the present invention will ensure that the ambient temperature in the insulator insulation box of process equipment such as the dust removal system equipment is always higher than the flue gas temperature T1 of the wet dust-containing flue gas, and can effectively avoid the risk of condensation and dew formation caused by the high-temperature wet dust-containing flue gas entering the process equipment such as the dust removal system equipment and entering the low-temperature environment such as the insulator insulation box 7 of the process equipment such as the dust removal system equipment.

[0020] Compared with the application of known control logic integrated into the control system (such as PLC / DCS), the present invention is different in that: 1) the present invention introduces the flue gas temperature T1 of the wet dust-containing flue gas processed in the process equipment such as the dust removal system equipment in real time online detection into the control logic of the control system (such as PLC / DCS), so that T1 participates 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 equipment or other types of heating equipment / components. T1 serves as the basic temperature value of the set value of the control system (such as PLC / DCS), and increases the control and detection variables or parameters of the control system (such as PLC / DCS); 2) the present invention sets a non-known temperature control value T2 on the control system (such as PLC / DCS), but sets a temperature additional value ΔT, and uses T1+ΔT as the control set value and the target value of the insulation operation; 3) the control system (such as PLC / DCS) in the present invention does not Rather than according to the known T2, the present invention provides a method for controlling and adjusting the actual operating temperature T2 of the insulation equipment on the process equipment, such as the electric heater or other type of heating equipment / component of the insulator insulation box of the dust removal system equipment, using T1+ΔT as the control set value. 4) In the present invention, the control logic of the control system (such as a PLC / DCS) needs to detect and monitor changes in process variables / parameters in addition to the known T2, and also needs to detect and monitor changes in T1, ΔT, and T1+ΔT in real time. A monitoring operation control is added to the HMI of the control system (such as a PLC / DCS). 5) In the present invention, the control set value of the control system (such as a PLC / DCS), the target value T1+ΔT for the insulation operation, and the actual operating temperature T2 of the insulation box are automatically and dynamically adjusted in real time as the flue gas temperature T1 of the wet and dusty flue gas entering the process equipment, such as the dust removal system equipment, changes. 6) In the control system (such as PLC / DCS) of the present invention, the setting of the control set value and the target value T1+ΔT for the insulation operation does not need to consider the physical and chemical properties of the wet dust-containing flue gas entering the process equipment such as the dust removal system equipment for treatment, such as the dew point temperature. It is assumed that if the wet dust-containing flue gas does not condense under the condition of T1 in the process equipment 3 such as the dust removal system equipment, there will be no possibility of condensation in the insulation equipment such as the dust removal system equipment insulator insulation box 7 under the condition of T2 higher than T1. Therefore, it is only necessary to set the value to satisfy ΔT>0°C; 7) In the control system (such as PLC / DCS) of the present invention, as long as the control parameter temperature additional value ΔT is set sufficiently small under the condition of ΔT>0°C, the maximum energy-saving operation of the insulation equipment such as the dust removal system equipment insulator insulation box can be achieved, thereby minimizing the operating energy consumption;8) The control logic of the control system (e.g., PLC / DCS) provided by the present invention implements a temperature control characteristic, T2 - T1 = ΔT > 0°C. This ensures that the ambient temperature within the insulator insulation box of process equipment 3, such as the dust removal system, is always higher than the flue gas temperature T1 of the wet and dusty flue gas. This effectively prevents the risk of condensation and dew formation from the high-temperature wet and dusty flue gas entering process equipment, such as the dust removal system, and entering the low-temperature environment of insulation equipment, such as the insulator insulation box of the dust removal system.

[0021] The beneficial technical effects of the present invention are: (1) The control system or temperature control device realizes the setting of the control target value without considering the inherent physical and chemical properties of the medium containing wet dust and flue gas in the process equipment, such as the dew point temperature of the wet dust and flue gas in the dust removal system equipment. The setting of the control target value only needs to set ΔT>0℃, and the setting process is particularly simple and convenient; (2) The operating temperature T2 of the heat preservation equipment on the process equipment, such as the dust removal system equipment insulator insulation box 7, is also adjusted in real time with the flue gas temperature T1 of the process equipment, such as the dust removal system equipment, which processes the wet dust-containing 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 heat preservation equipment on the process equipment, such as the dust removal system equipment insulator insulation box, are synchronized and adaptively followed and automatically dynamically adjusted; (3) The real-time adaptive automatic dynamic adjustment of the temperature 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 on the process equipment, such as the insulator insulation box of the dust removal system equipment, and effectively avoid the condensation phenomenon in the insulation equipment, such as the insulator insulation box of the dust removal system equipment, but also achieve maximum energy-saving operation and minimize operating energy consumption; (4) When setting up the control system or temperature control device, as long as the setting satisfies ΔT>0℃, it can ensure that the temperature T2 of the insulation equipment on the process equipment, such as the dust removal system equipment insulator insulation box 7, is higher than the flue gas temperature T1 of the wet dust-containing flue gas by a temperature additional value ΔT; as long as the wet dust-containing 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 wet dust-containing flue gas in the insulation equipment on the process equipment, such as the dust removal system equipment insulator insulation box, and also eliminate the risk of condensation of high-temperature wet dust-containing flue gas after entering a relatively low-temperature environment from a relatively high-temperature environment.

[0022] Based on the premise that as long as the wet dust-containing flue gas entering the process equipment such as the dust removal system equipment does not condense under the condition of T1, there will be no possibility of condensation in the insulation box of the insulation equipment such as the dust removal system equipment under the condition of T2 higher than T1, the implementation of the present invention ensures that the operating temperature T2 in the insulation box of the insulation equipment such as the dust removal system equipment on the process equipment is higher than the temperature T1 of the wet dust-containing flue gas entering the process equipment such as the dust removal system equipment, so the wet dust-containing flue gas will not condense in the insulation box of the insulation equipment such as the dust removal system equipment under the condition of T2 higher than T1. Therefore, during the implementation of the present invention, control engineering and control professional operation and maintenance personnel do not need to pay attention to or consider the dew point temperature of the wet and dusty flue gas entering the process equipment when setting the control set value and the target value of the insulation operation. They only need to set it to meet ΔT>0℃. This shows that the present invention also realizes the real-time adaptive following and synchronous automatic dynamic adjustment of the insulation and heating control adjustment process of the insulation equipment on the process equipment, such as the insulator insulation box 7 of the dust removal system equipment, by the control system or temperature regulation control device as the process conditions change. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the insulation control flow chart of the insulation box.

[0024] Figure 2 This is the insulation control logic diagram of the insulation box.

[0025] 1. Dust source point dust removal and exhaust hood; 2. Dust removal system inlet flue gas duct; 3. Process equipment; 4. Dust collector system outlet flue gas duct; 5. Dust removal system fan; 6. Dust collector system clean flue gas discharge duct; 7. Insulator insulation box; 8. Wall-penetrating magnetic bushing; 9. Support magnetic bushing; 10. High-voltage connecting leads; 11. Electric heater; 12. Temperature detection element; 13. Flue gas temperature detection sensor / transmitter; 14. Insulator chamber temperature detection sensor / transmitter; 15. Temperature control device. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] The process equipment 3 and the heat preservation equipment described in the specification are shown in the accompanying drawings. Figure 1 and Figure 2 The illustrations are all based on the insulation equipment on the dust collector or electrostatic precipitator and the process equipment 3, such as the insulator insulation box 7 of the dust removal system equipment.

[0028] Refer to the appendix of the present invention Figure 1 "Insulation control flow chart of the insulation box with automatic dynamic adjustment of the temperature control target value" and the instructions Figure 2"Logic diagram for thermal insulation control of an insulation box with automatic dynamic adjustment of the temperature control target value": 1) The present invention introduces and utilizes the flue gas temperature T1 of the medium containing wet dust and flue gas in process equipment 3 as the basic value of the temperature control system target value, such as the flue gas temperature T1 of the wet dust and flue gas processed in the dust removal system of process equipment 3; 2) A temperature additional value ΔT is set on the temperature control device 15, and ΔT is ensured to be greater than 0°C when ΔT is set; 3) The temperature control device 15 performs a sum operation on the flue gas temperature T1 of the medium containing wet dust and flue gas and the temperature additional value ΔT to obtain T1 + ΔT. T1+ΔT will follow the fluctuation of the flue gas temperature T1 of the wet and dusty flue gas in the process equipment 3 in real time and automatically adjust dynamically; 4) the temperature control system 15 uses T1+ΔT as the control set value and the target value of the insulation operation; 5) a temperature control system or temperature control device 15 is constructed; 6) the control system or temperature control device 15 also detects the actual operating temperature T2 of the insulation equipment on the process equipment 3, such as the dust removal system equipment insulator insulation box 7 in real time, and uses T2 as a feedback control signal; 7) the control logic of the control system or temperature control device 15 is constructed so that it has T2-T1=ΔT. The temperature control characteristic of T>0℃; 8) The adjustment function of the control system or the temperature adjustment control device 15 adjusts and controls the insulation equipment on the process equipment 3, such as the electric heater 11 of the insulator insulation box 7 of the dust removal system equipment, or other types of heating equipment / components according to the temperature control characteristic of T2-T1=ΔT>0℃; 9) The actual 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, will also achieve the temperature characteristic of T2-T1=ΔT>0℃ as the flue gas temperature T1 of the wet and dusty flue gas in the process equipment 3 fluctuates, and obtains the temperature control effect of real-time automatic tracking and real-time automatic dynamic adjustment.

[0029] As the instruction manual Figure 1 and attached Figure 2As shown, 1) the control target value T1+ΔT of the control system or temperature control device 15 of the insulation equipment on the process equipment 3, such as the dust removal system equipment insulator insulation box 7, is achieved in real time following and automatically dynamically adjusting as the flue gas temperature T1 of the wet dust-containing flue gas in the process equipment 3 flue gas ...

[0030] The main technical features of the present invention are mainly reflected in the following.

[0031] One of the main technical features: The present invention incorporates the flue gas temperature T1 of the wet dust-containing flue gas processed by the process equipment 3, such as the dust removal system, which is detected in real time online, into the control system / device as the basic temperature value of the control set value. 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 wet dust-containing flue gas processed by the process equipment 3, such as the dust removal system. Regardless of how the flue gas temperature T1 of the wet dust-containing flue gas processed by the process equipment 3, such as the dust removal system, changes, T1, as the basic temperature value of the control set value, will change with the fluctuation of the flue gas temperature T1. T1, as the basic temperature value variable of the control set value, realizes real-time tracking and automatic dynamic adjustment of the flue gas temperature T1 of the wet dust-containing flue gas processed by the process equipment 3, such as the dust removal system.

[0032] The second main technical feature: The present invention is based on the fact that if the wet dust-containing flue gas does not condense under the condition of T1 in the process equipment 3 such as the dust removal system equipment, there will be no possibility of condensation in 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 temperature additional value ΔT on the temperature control system or the temperature adjustment control device 15 of the present invention, it is only necessary to set it to satisfy ΔT>0℃. The temperature control system or the temperature adjustment control device 15 will ensure that the operating temperature T2 in the insulation equipment such as the insulator insulation box 7 of the dust removal system equipment on the process equipment 3 is higher than the flue gas temperature T1 of the wet dust-containing flue gas entering the process equipment 3 such as the dust removal system equipment for treatment by the temperature additional value ΔT, thereby ensuring that the inside of the insulator insulation box 7 is a high-temperature environment relative to the temperature T1.

[0033] The third main technical feature: The temperature control system or temperature regulation control device 15 of the present invention uses T1+ΔT as the control set value, and the control set value T1+ΔT also changes with the change of the flue gas temperature T1 of the wet and dusty flue gas entering the process equipment 3 such as the dust removal system equipment for treatment, thereby realizing real-time tracking and automatic dynamic adjustment of T1.

[0034] The fourth main technical feature: The effect after the implementation of the present invention is that the actual operating temperature T2 in the insulation box 7 of the insulator of the insulation equipment on the process equipment 3, such as the dust removal system equipment, dynamically follows the change of the flue gas temperature T1 of the wet and dusty flue gas entering the process equipment 3, such as the dust removal system equipment, thereby realizing the real-time following and automatic dynamic adjustment of the actual operating temperature T2 in the insulation box 7 of the insulator of the insulation equipment on the control target process equipment 3, such as the dust removal system equipment.

[0035] The fifth main technical feature: The implementation of the present invention realizes that the operating temperature T2 in the insulation box 7 of the insulator 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 wet dust-containing flue gas entering the process equipment 3 such as the dust removal system equipment for treatment. As long as the wet dust-containing flue gas entering the process equipment 3 such as the dust removal system equipment for treatment does not condense under the condition of T1, there will be no possibility of condensation in the insulation box 7 of the insulator of the dust removal system equipment under the condition of T2 which is higher than T1. Therefore, when setting the control set value and the target value of the insulation operation during the implementation of the present invention, only the temperature additional value ΔT is set, and when setting the temperature additional value ΔT, there is no need to pay attention to and consider the dew point temperature parameters of the wet dust-containing flue gas entering the process equipment 3 for treatment. It only needs to be set to satisfy ΔT>0℃, which is particularly simple and convenient.

[0036] The sixth main technical feature: In the present invention, when the setting of the temperature additional value ΔT satisfies ΔT>0℃, a sufficiently small setting value of the temperature additional value ΔT can reduce 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, which is too high, and reduce unnecessary energy consumption caused by excessive T2, so as to achieve the maximum energy-saving operation of the insulation equipment on the process equipment 3, such as the insulator insulation box 7 of the dust removal system equipment, under anti-condensation and dew condensation operating conditions, and maximize the reduction of operating energy consumption.

[0037] The temperature control system or temperature adjustment control device 15 provided by the present invention 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 equipment on the process equipment 3, such as the insulator insulation box 7 of the dust removal system equipment, but also effectively avoid the risk of condensation when the high-temperature wet and dusty flue gas entering the process equipment 3, such as the dust removal system equipment, enters the low-temperature environment such as the insulator insulation box 7 of the dust removal system equipment.

[0038] The implementation of the present invention also has the beneficial effect of not significantly increasing the cost of the entire production process control system. Firstly, monitoring the operating temperature T1 of the wet dust-laden flue gas entering process equipment 3, such as the dust removal system, and T2 of the insulation equipment on process equipment 3, such as the dust removal system's insulator insulation box 7, is generally a standard feature of the process production control system, without increasing the cost of the instrumentation and control facilities required for monitoring and monitoring of the entire process control system. Secondly, for implementations where the system is integrated into a control system (such as a PLC / DCS), the upgrade or modification task is to upgrade the control logic of the control system according to the control logic disclosed in the present invention, with only the addition of settings and display controls for the additional value ΔT to components such as the HMI of the control system (such as the PLC / DCS). Thirdly, for implementations where the temperature control device 15 is used, the temperature control device 15 merely adds a detection input channel for the wet dust-laden flue gas entering process equipment 3, such as the dust removal system, to be processed. Therefore, upgrading the control logic does not increase the hardware cost of the temperature control device 15.

[0039] Figures in the specification Figure 1 It is the “Insulation Control Flowchart of Insulation Box”.

[0040] Figure 1 What is shown is the technical solution idea and technical solution of the present invention, and Figure 1 The system structure, control signal flow and connection, working principle and working process of the present invention are also demonstrated.

[0041] Figure 1 The components include (but are not limited to): 1. Dust source point dust removal and exhaust airtight cover; 2. Dust removal system inlet flue gas duct; 3. Process equipment; 4. Dust collector system outlet flue gas duct; 5. Dust removal system fan; 6. Dust collector system clean flue gas discharge duct; 7. Insulator insulation box; 8. Wall magnetic bushing; 9. Support magnetic bushing; 10. High-voltage connecting lead; 11. Electric heater; 12. Temperature detection element; 13. Flue gas temperature detection sensor / transmitter (T1); 14. Insulator chamber temperature detection sensor / transmitter (T2); 15. Temperature adjustment control device.

[0042] Figure 1 A temperature control device 15 is used to construct a system to demonstrate the method for automatically and dynamically adjusting the temperature control target value disclosed in the present invention and the working principle and working process of a temperature control device. The present invention can also use a method integrated into a control system (such as PLC / DCS) to implement the method for automatically and dynamically adjusting the temperature control target value disclosed in the present invention.

[0043] When the present invention is implemented by a method integrated into a control system (such as a PLC / DCS), 1) the operating temperature T1 of the wet dust-containing flue gas entering the process equipment 3 such as the dust removal system equipment and the operating temperature T2 signal in the insulation equipment on the process equipment 3 such as the insulator insulation box 7 of the dust removal system equipment are directly input into the IO channel of the electronic component 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 the present invention; 4) the IO channel of the electronic component or control unit of the control system (such as a PLC / DCS) outputs a control signal to adjust 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.

[0044] Figures in the specification Figure 2 It is the "insulation box insulation control logic diagram".

[0045] Figure 2 What is shown is a typical control system and control logic of the temperature adjustment control device 15 constructed in real time according to the technical solution ideas and technical solutions disclosed by the present invention.

[0046] Apart from Figure 1 Each component in Figure 2 The components include (but are not limited to): 8. Wall-penetrating magnetic sleeve; 9. Support magnetic sleeve; 10. High-voltage connecting lead; 11. Electric heater; 12. Temperature detection element; 15. Temperature adjustment control device.

[0047] Figure 2 In the embodiment, the regulating controller adopted by the temperature regulating control device 15 can adopt P, PI, PD, or PID regulators as needed. When the control accuracy requirement is not high, a comparison operator can also be used to perform simple position-type regulating switch control; the temperature regulating control device / system 15 also has a communication interface for communicating with the upper-level system control and device; the temperature regulating control device / system 15 has a setting function for the temperature additional value ΔT and a control communication interface for external setting.

[0048] Figure 2In the figure, T1 and △T are added together by the adder of the temperature control device / system 15 to obtain T1+△T; T1+△T is used as the given signal of the control controller of the temperature control device / system 15; T2 is used as the feedback control signal of the control controller of the temperature control device / system 15; T1+△T-T2 is used as the input signal of the control controller of the temperature control device / system 15; the control controller adopts a negative feedback control control strategy; the control controller of the temperature control device / system 15 can also use a comparison operator to perform simple position adjustment switch control; the temperature control device / system 15 performs the adjustment control function of the electric heater 11.

[0049] For T1, the process system will ensure that T1 meets the requirement of T1> flue gas dew point temperature. Therefore, when setting the temperature added value ΔT, 1) the temperature control target is to make the temperature T2 inside the insulator insulation box not lower than the dew point temperature of the flue gas entering the dust collector, and leave an appropriate safety margin. Therefore, under the condition of T1> flue gas dew point temperature, set ΔT>0℃; 2) under the condition of ΔT>0℃, take the minimum value of ΔT from the perspective of energy saving.

[0050] Figure 1 and Figure 2 The illustrated embodiments collectively demonstrate the complete system implementation, complete control system, technical solution ideas, technical solutions, working principles and working processes of the methods and devices implemented by the present invention formed during and after the implementation of the present invention.

Claims

1. A method for dynamically adjusting a temperature control target value, characterized in that The temperature T1 of the medium in the process equipment (3) is used as the basic value of the temperature control target value, and the temperature additional value ΔT is set on the temperature control device on the process equipment (3). The sum formed by adding the temperature T1 of the medium and the temperature additional value ΔT is used as the control target value of the temperature control device on the process equipment (3), that is, T1+ΔT is used as the control setting value and the target value of the insulation operation; ΔT is set to be greater than 0°C to achieve T2>T1.

2. A method for dynamically adjusting a temperature control target value according to claim 1, characterized in that The process equipment (3) is a dust removal system equipment, the medium is wet dust-containing flue gas, and the temperature control equipment is an insulator insulation box (7) of the dust removal system equipment; a temperature adjustment control device (15) is provided in the insulator insulation box (7) of the dust removal system equipment, and the temperature adjustment control device (15) controls and adjusts the actual operating temperature T2 of the insulator insulation box (7) with T1+ΔT as a control set value; the wet dust-containing flue gas does not condense under the condition of T1 in the dust removal system equipment. Therefore, dew will not condense in the insulator insulation box (7) of the dust removal system equipment under the condition of T2 which is higher than T1.

3. A method for dynamically adjusting a temperature control target value according to claim 2, characterized in that The steps of the temperature control target value dynamic adjustment method are: (1) Real-time detection of the real-time flue gas temperature T1 of the wet and dusty flue gas processed in the dust removal system equipment; (2) Real-time detection of the operating temperature T2 of the dust removal system equipment insulator insulation box (7) on the dust removal system equipment; (3) Constructing a temperature control device (15) with the function of setting the temperature added value ΔT; (4) T1+ΔT is used as the control setting value of the temperature control device (15) and the target value of the heat preservation operation, so that the control target value T1+ΔT can be followed and dynamically adjusted in real time as the flue gas temperature T1 of the wet dust-containing flue gas processed in the dust removal system equipment changes; (5) Constructing a temperature control device (15) with T1 + ΔT as the set value and T2 as the feedback value; (6) Constructing the control logic of the temperature regulating control device (15) so that the control logic of the temperature regulating control device (15) has the temperature control characteristic of completing T2-T1=ΔT>0°C.

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