Group control device for electric heating organic heat carrier furnace

Abstract

The utility model discloses a grouping control device for an electric heating organic heat transfer material furnace, which comprises a boiler barrel, a plurality of electric heaters and an electric control device, and the grouping control device comprises an analog quantity stepless power regulation mode group and a switching value control mode group, the analog quantity stepless power regulation mode group comprises at least one electric heater and stepless power regulation modules, each electric heater in the analog quantity stepless power regulation mode group is electrically connected with one stepless power regulation module, and the stepless power regulation modules are electrically connected with the power supply and the electric control device; the switching value control mode group comprises residual electric heaters except the electric heaters contained in the analog quantity stepless power regulation mode group and switch control devices, each electric heater in the switching value control mode group is electrically connected with one switch control device, and the switch control devices are electrically connected with a power supply and an electric control device. According to the utility model, the temperature of the organic heat carrier can be accurately controlled, and the use requirements of a high-power electric heating organic heat carrier furnace can be met.

Description

Technical Field

[0001] The utility model relates to an electrically heated organic heat carrier furnace, in particular to a temperature control device for the electrically heated organic heat carrier furnace, belonging to the technical field of automatic control of electrically heated organic heat carrier furnaces. Background Art

[0002] The electric heating organic heat carrier boiler is a special industrial boiler. It uses organic heat carrier as heat medium. The electric heater is immersed in the organic heat carrier of the drum. The electric heater is powered on to directly heat the organic heat carrier. The heat medium circulation pump is used to force the liquid phase to circulate. After the heat energy is delivered to the heat-using device or equipment, it is returned for reheating and recycling. It is a new type of environmentally friendly, energy-saving, low-pressure (under normal pressure or lower pressure), safe, and can provide high-temperature heat energy. Direct-flow special industrial boiler. In recent years, as the country pays attention to environmental protection and vigorously advocates the use of clean energy, the electric heating organic heat carrier boiler has been widely used in many industries such as petroleum, chemical industry, chemical fiber, building materials, light industry, textile, printing and dyeing, and food.

[0003] The key point of the control of the electric heating organic heat carrier furnace is to control the heating temperature of the organic heat carrier to achieve the required control temperature accuracy. At present, although the small power electric heating organic heat carrier furnace adopts the thyristor control technology to basically meet the control requirements, for the large power (power above several hundred kW) electric heating organic heat carrier furnace, because under the same control given increment, the power increment of the large power electric heater is much larger than that of the small power electric heater, the disturbance is larger, resulting in adverse effects on the temperature control of the organic heat carrier, especially for some use occasions with high temperature accuracy, the temperature accuracy requirements cannot be met. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an electric heating organic heat carrier furnace grouping control device which can accurately control the temperature of the organic heat carrier and meet the use requirements of a high-power electric heating organic heat carrier furnace.

[0005] In order to solve the above technical problems, the utility model adopts such an electric heating organic heat carrier furnace group control device, which includes a drum arranged horizontally or vertically and accommodating an organic heat carrier, a plurality of electric heaters for heating the organic heat carrier, and an electric control device, wherein the drum is provided with an organic heat carrier inlet pipe and an organic heat carrier outlet pipe, and a temperature sensor is provided in the organic heat carrier outlet pipe, and the temperature sensor is electrically connected to the electric control device, and the electric heating organic heat carrier furnace group control device includes an analog stepless power adjustment mode group and a switch control mode group, wherein the analog stepless power adjustment mode group includes at least one electric heater and a stepless power adjustment module, wherein each electric heater in the analog stepless power adjustment mode group is electrically connected to a stepless power adjustment module, and the stepless power adjustment module is electrically connected to a power supply and an electric control device; wherein the switch control mode group includes the remaining electric heaters except the electric heaters contained in the analog stepless power adjustment mode group and a switch control device, wherein each electric heater in the switch control mode group is electrically connected to a switch control device, and the switch control device is electrically connected to a power supply and an electric control device.

[0006] As a preferred implementation mode of the present utility model, the stepless power regulation module includes a power regulator or a solid-state relay or a thyristor power regulator, and the switch control device includes a contactor or a solid-state relay.

[0007] As a preferred implementation mode of the utility model, the stepless power regulation module and the switch control device are electrically connected to the power supply via a circuit protection switch.

[0008] As a preferred implementation of the utility model, the circuit protection switch includes a vacuum circuit breaker or an air switch or a fuse.

[0009] As a preferred implementation mode of the utility model, a current transformer is installed in the circuit connecting the stepless power regulation module, the switch control device and the circuit protection switch.

[0010] As a preferred implementation of the utility model, the electric control device is an industrial computer or an ARM embedded industrial controller or a DDC digital controller with a human-machine interface or a PLC programmable controller or a single-chip microcomputer.

[0011] After adopting the above structure, the utility model has the following beneficial effects:

[0012] The utility model is provided with an analog stepless power regulation mode group and a switch control mode group, wherein the analog stepless power regulation mode group comprises at least one electric heater and a stepless power regulation module, each electric heater in the analog stepless power regulation mode group is electrically connected to a stepless power regulation module respectively, and the switch control mode group comprises the remaining electric heaters and a switch control device except the electric heater contained in the analog stepless power regulation mode group, each electric heater in the switch control mode group is electrically connected to a switch control device respectively, when working, the electric control device controls the switch control device to receive electric energy, and the electric heater in the switch control mode group performs Heating, the temperature sensor transmits the detected temperature of the organic heat carrier to the electric control device in real time. When the temperature of the organic heat carrier detected by the electric control device is close to the temperature required by the process, the electric control device controls the switch control device to cut off the power, and the electric heater in the switch control mode group stops heating the organic heat carrier in the drum. At the same time, the electric control device controls the stepless power regulation module to receive power and modulate the received power to control the amount of output power, thereby realizing the control of the electric heater in the analog stepless power regulation mode group to convert power into thermal energy, so as to achieve the purpose of accurately controlling the temperature of the organic heat carrier in the drum of the electrically heated organic heat carrier furnace.

[0013] The utility model is provided with an analog stepless power regulation mode group and a switch control mode group, and the operating power of the electric heating organic heat carrier furnace is adjustable within the range of 0% to 100%, so that the actual operating power of the electric heater of the electric heating organic heat carrier furnace matches the heat load of the heat-using equipment, so that the range of adjusting the electric heating power is small, which is conducive to reducing the fluctuation of the heating temperature of the electric heating organic heat carrier.

[0014] The utility model has the advantages of simple structure, low investment cost, accurate, stable and reliable heating temperature of organic heat carrier, can meet the use requirements of high-power electric heating organic heat carrier furnace, and is conducive to popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0016] Figure 1 The utility model is a structural schematic diagram of a group control device for an electrically heated organic heat carrier furnace. DETAILED DESCRIPTION

[0017] See also Figure 1The electric heating organic heat carrier furnace group control device shown in the figure, the electric heating organic heat carrier furnace comprises a horizontally or vertically arranged drum 1 for accommodating an organic heat carrier, a plurality of electric heaters 2 for heating the organic heat carrier, and an electric control device. The figure does not show the organic heat carrier, the electric control device, and the vertically arranged drum. The electric heater 2 usually adopts an electric heating tube or an electric heating rod. The drum 1 is provided with an organic heat carrier inlet pipe 1-1 and an organic heat carrier outlet pipe 1-2. A temperature sensor 3 is provided in the organic heat carrier outlet pipe 1-2. As shown in the figure, the organic heat carrier inlet pipe 1-1 is provided at the bottom of the left side of the drum 1, and the organic heat carrier outlet pipe 1-2 is provided at the top of the right side of the drum 1. When working, the organic heat carrier with a lower temperature enters the drum 1 from the organic heat carrier inlet pipe 1-1, and is output from the organic heat carrier outlet pipe 1-2 to the heat-using equipment after being heated. The temperature sensor 3 is electrically connected to the electric control device through wired or wireless communication. The boiler group control device includes an analog stepless power regulation mode group A and a switch control mode group B. The analog stepless power regulation mode group A includes at least one electric heater 2 and a stepless power regulation module 4. Each electric heater 2 in the analog stepless power regulation mode group A is electrically connected to a stepless power regulation module 4 for receiving electric energy output by the stepless power regulation module 4, so that each electric heater 2 in the analog stepless power regulation mode group converts electric energy into thermal energy to heat the organic heat carrier in the drum 1. The stepless power regulation module 4 is electrically connected to a power supply and an electric control device; the switch control mode group B includes the remaining electric heaters 2 except the electric heater 2 contained in the analog stepless power regulation mode group A and a switch control device 5. Each electric heater 2 in the switch control mode group B is electrically connected to a switch control device 5 for receiving electric energy, so that each electric heater 2 in the switch control mode group B converts electric energy into thermal energy to heat the organic heat carrier in the drum 1. The switch control device 5 is electrically connected to a power supply and an electric control device. In the present invention, there are eight electric heaters 2 in the drum 1 shown in the figure, among which the analog stepless power regulation mode group A contains three electric heaters 2, and the switch control mode group B contains the remaining electric heaters 2, that is, five electric heaters 2. Of course, according to the power of the electric heaters of the electric heating organic heat carrier furnace, the heat load fluctuation characteristics and the temperature control accuracy requirements, the electric heaters 2 in the drum 1 can be less than eight, such as 2 to 7, or more than eight, such as nine or more, which is not shown in the figure. In the present invention, multiple electric heaters 2 in the analog stepless power regulation mode group A, such as two, three or four, can also be electrically connected to only one stepless power regulation module 4, which is not shown in the figure.

[0018] As a preferred embodiment of the present invention, the stepless power regulation module 4 includes a power regulator or a solid-state relay or a thyristor power regulator, and the switch control device 5 includes a contactor or a solid-state relay.

[0019] As a preferred embodiment of the present invention, Figure 1 As shown, the stepless power regulation module 4 and the switch control device 5 are electrically connected to the power supply via the circuit protection switch 6, and the circuit is protected from overload, short circuit, etc. by the circuit protection switch 6. The circuit protection switch 6 preferably includes a vacuum circuit breaker or an air switch or a fuse. As shown in the figure, the stepless power regulation module 4 and the switch control device 5 are preferably electrically connected to the power supply via the circuit protection switch 6 and the distribution busbar 8.

[0020] As a preferred embodiment of the present invention, Figure 1 As shown, a current transformer 7 is installed in the circuit connecting the stepless power regulation module 4, the switch control device 5 and the circuit protection switch 6.

[0021] As a preferred implementation of the utility model, the electric control device is an industrial computer or an ARM embedded industrial controller or a DDC digital controller with a human-machine interface or a PLC programmable controller or a single-chip microcomputer.

[0022] A preferred working process of the utility model, see Figure 1 The electric control device controls the switch control device 5 to receive electric energy, and the electric heater 2 in the switch quantity control mode group B heats the organic heat carrier in the drum 1. The temperature sensor 3 transmits the detected temperature of the organic heat carrier to the electric control device in real time. When the temperature of the organic heat carrier detected by the electric control device is close to the temperature required by the process, for example, when the real-time temperature is only 1 to 5 degrees different from the temperature required by the process, the electric control device controls the switch control device 5 to cut off the electric energy, and the electric heater 2 in the switch quantity control mode group B stops heating the organic heat carrier in the drum 1. At the same time, the electric control device controls the stepless power regulation module 4 to receive electric energy and modulate the received electric energy to control the amount of output electric energy, thereby realizing the control of the electric heater 2 in the analog stepless power regulation mode group A to convert electric energy into thermal energy, so that the temperature of the organic heat carrier accurately reaches the temperature required by the process, thereby achieving the purpose of accurately controlling the temperature of the organic heat carrier in the drum 1 of the electrically heated organic heat carrier furnace.

[0023] After trial, the utility model can accurately control the temperature of the organic heat carrier, can well meet the use requirements of a high-power electric heating organic heat carrier furnace, has a simple structure, low investment cost, and has achieved good practical effects.

Claims

1. A group control device for an electrically heated organic heat carrier furnace, the electrically heated organic heat carrier furnace comprising a drum (1) arranged horizontally or vertically and accommodating an organic heat carrier, a plurality of electric heaters (2) for heating the organic heat carrier, and an electric control device, the drum (1) being provided with an organic heat carrier inlet pipe (1-1) and an organic heat carrier outlet pipe (1-2), a temperature sensor (3) being provided in the organic heat carrier outlet pipe (1-2), the temperature sensor (3) being electrically connected to the electric control device, characterized in that: The group control device for an electrically heated organic heat carrier furnace comprises an analog stepless power modulation mode group (A) and a switch control mode group (B), wherein the analog stepless power modulation mode group (A) comprises at least one electric heater (2) and a stepless power modulation module (4), wherein each electric heater (2) in the analog stepless power modulation mode group (A) is electrically connected to a stepless power modulation module (4), and the stepless power modulation module (4) is electrically connected to a power supply and an electric control device; and the switch control mode group (B) comprises the remaining electric heaters (2) except the electric heater (2) in the analog stepless power modulation mode group (A) and a switch control device (5), wherein each electric heater (2) in the switch control mode group (B) is electrically connected to a switch control device (5), and the switch control device (5) is electrically connected to a power supply and an electric control device.

2. The electrically heated organic heat carrier furnace grouping control device according to claim 1 is characterized in that: The stepless power regulation module (4) comprises a power regulator or a solid-state relay or a thyristor power regulator, and the switch control device (5) comprises a contactor or a solid-state relay.

3. The electrically heated organic heat carrier furnace grouping control device according to claim 1 or 2, characterized in that: The stepless power regulation module (4) and the switch control device (5) are electrically connected to a power source via a circuit protection switch (6).

4. The electrically heated organic heat carrier furnace grouping control device according to claim 3 is characterized in that: The circuit protection switch (6) comprises a vacuum circuit breaker or an air switch or a fuse.

5. The electrically heated organic heat carrier furnace grouping control device according to claim 3 is characterized in that: A current transformer (7) is installed in the circuit in which the stepless power regulation module (4), the switch control device (5) and the circuit protection switch (6) are connected.

6. The electrically heated organic heat carrier furnace grouping control device according to claim 1 is characterized in that: The electric control device is an industrial computer or an ARM embedded industrial controller or a DDC digital controller with a human-machine interface or a PLC programmable controller or a single-chip microcomputer.

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