阅读说明：本技术 一种适用于高温高压工况环境的电磁式加热装置及其使用方法 (Electromagnetic heating device suitable for high-temperature and high-pressure working condition environment and use method thereof ) 是由 赵延炜 徐金华 于 2021-06-16 设计创作，主要内容包括：本发明公开了一种适用于高温高压工况环境的电磁式加热装置及其使用方法,包括设置在护罩内的压力容器,所述压力容器位于护罩的轴向中心位置,所述压力容器与护罩之间的空隙内设置有电磁感应线圈,所述压力容器内设置有换热用的导磁发热体,所述导磁发热体包括发热柱体和发热板体,所述发热柱体安装于压力容器的轴向中心位置,所述发热板体围绕发热柱体呈环形分布有若干个,且发热柱体通过发热板体与压力容器的内壁连接固定。该适用于高温高压工况环境的电磁式加热装置采用压力容器与导磁发热体功能分离的设计,更为安全,本发明加热器单位面积热负荷大,换热面积大,升温速率快,加温范围广0～1000℃,管板焊缝少,高压环境泄露隐患小,维护成本低。(The invention discloses an electromagnetic heating device suitable for a high-temperature and high-pressure working condition environment and a using method thereof. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment adopts the design of separating the functions of the pressure container and the magnetic conduction heating element, so that the electromagnetic heating device is safer, the heater has large heat load per unit area, large heat exchange area, high heating rate, wide heating range of 0-1000 ℃, few tube plate welding seams, small hidden danger of high-pressure environment leakage and low maintenance cost.)

1. The utility model provides an electromagnetic type heating device suitable for high temperature high pressure operating mode environment which characterized in that: including setting up pressure vessel (2) in guard shield (1), pressure vessel (2) are located the axial direction central point of guard shield (1) and put, be provided with electromagnetic induction coil (3) in the space between pressure vessel (2) and guard shield (1), be provided with magnetic conduction heat-generating body (6) in pressure vessel (2), and magnetic conduction heat-generating body (6) through rather than the medium contact of inside circulation in order to carry out the heat transfer.

2. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to claim 1, characterized in that: magnetic conduction heat-generating body (6) are including generating heat cylinder (61) and heating plate body (62), the axial direction central point that generates heat cylinder (61) and install in pressure vessel (2) puts, heating plate body (62) are the annular around generating heat cylinder (61) and distribute and have a plurality of, and the inner wall connection that generates heat cylinder (61) and pressure vessel (2) through heating plate body (62) is fixed.

3. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to claim 2, characterized in that: the interior of the heating cylinder (61) is of a hollow structure.

4. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to claim 2, characterized in that: the magnetic conduction heating element (6) is made of graphite steel.

5. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to claim 1, characterized in that: an insulating layer (4) is further arranged between the electromagnetic induction coil (3) and the pressure container (2), and substances filled in the insulating layer (4) comprise aluminum silicate or an aluminum silicate fiber blanket.

6. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to claim 1, characterized in that: the electromagnetic induction coil (3) is uniformly wound on the heat-insulating layer (4) along the axial direction of the pressure container (2).

7. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to claim 1, characterized in that: the pressure vessel (2) is made of austenitic stainless steel or nickel-based alloy steel.

8. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to claim 1, characterized in that: the electromagnetic induction coil (3) is electrically connected with a variable frequency controller (5).

9. The electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to claim 8, characterized in that: the type of the variable frequency controller (5) is an SPZ-300 intermediate frequency controller.

10. The use method of the electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment according to any one of claims 1 to 9 is characterized in that: the method comprises the following steps:

step (A), mounting and fixing; firstly, an electromagnetic heating device is placed in a medium circulation pipeline to be heated, flanges at two ends of a pressure container (2) are butted with pipeline flanges, and bolts are screwed;

step (B), adjusting the medium state; opening a pipeline valve to enable the medium in the pipeline to circulate, and continuously maintaining the circulation state;

step (C), calculating the power required by the electromagnetic heating device in the three processes before, during and after heating through the following formula (1), and turning on a frequency conversion controller (5) to adjust the power to the required power;

P＝C^＊M^＊ΔT^＊1.2/(863^＊H) (1); wherein, P is the power of the electromagnetic heating device; c is the specific heat of the heated medium; m mass of heated medium; Δ T is the temperature difference, i.e. the difference between the final temperature and the initial temperature of the heating medium; 1.2 is a safety margin coefficient; 863 is a unit conversion coefficient; h is the time required for heating the initial temperature to the set temperature;

before heating: step (C1), preheating, wherein preheating time and temperature are set, so that power required by the electromagnetic heating device for preheating is obtained, and the preheating power is set through the variable frequency controller (5);

step (C2) of switching on a power supply of the electromagnetic heating device;

step (C21), after the power supply is switched on, current passes through the electromagnetic induction coil (3) to generate an alternating magnetic field, when magnetic force in the magnetic field passes through the magnetic conduction heating element (6), alternating magnetic lines of force penetrate through the magnetic conduction heating element (6) to form a loop, so that induced current is generated in the cross section of the loop, and the induced current is called as eddy current;

step (C22), the atoms inside the magnetic conduction heating element (6) move randomly at high speed by the eddy current, and the atoms collide and rub with each other to generate heat energy for heating the magnetic conduction heating element (6); the heated medium flows through the surface of the magnetic conduction heating element (6) and absorbs the heat on the surface of the magnetic conduction heating element to exchange heat;

step (C3), completing the preheating of the magnetic conduction heating element (6);

in the heating process: step (C4), heating, setting the heating time and temperature to obtain the power required by the electromagnetic heating device, setting the heating power through a variable frequency controller (5), repeating the step (C2) and completing the heating of the magnetic conduction heating element (6);

after heating: and (C5) heat supplementing, namely setting the time and the temperature of heat supplementing to obtain the power required by the heat supplementing of the electromagnetic heating device, setting the heat supplementing power through the variable frequency controller (5), and repeating the step (C2) to finish the heat supplementing of the magnetic conduction heating element (6).

Technical Field

The invention belongs to the technical field of heaters, and particularly relates to an electromagnetic heating device suitable for a high-temperature and high-pressure working condition environment and a using method thereof.

Background

The mainstream electric heaters in the market at present are divided into conventional resistance heaters, conventional electromagnetic heaters and infrared heating; the conventional resistance heater adopts a heating method that the blank is heated by using the heat released by the electric heating body through the current, common resistance wire heating, ceramic heater, resistance coil heating and quartz tube heating belong to resistance heating in principle, the conventional resistance heater has small heat load per unit area, low heating rate and no requirement on a medium carrier, and the general heating range is wide between 0 and 1000 ℃; the conventional electromagnetic heater has large heat load per unit area and high heating rate, a medium carrier needs to be a magnetizer, the heating range is generally 0-600 ℃, the purchase cost is high, and the welding seams of the tube plate are few.

The traditional resistance heater has the disadvantages of slow heating rate, more pipe plate welding seams, large hidden danger of high-pressure environment leakage and higher maintenance cost, and the traditional electromagnetic heater has the disadvantages of narrow heating range and high purchasing cost because the medium carrier needs to be a magnetizer.

Disclosure of Invention

The invention aims to provide an electromagnetic heating device suitable for a high-temperature and high-pressure working condition environment and a using method thereof, and aims to solve the problems that a heater tube plate provided in the background technology has more welding lines, large hidden danger of high-pressure environment leakage, higher maintenance cost and narrow heating range.

In order to achieve the purpose, the invention provides the following technical scheme: the electromagnetic heating device comprises a pressure container arranged in a shield, wherein the pressure container is positioned at the axial center of the shield, an electromagnetic induction coil is arranged in a gap between the pressure container and the shield, a magnetic conduction heating body is arranged in the pressure container, and the magnetic conduction heating body is contacted with a medium circulating inside the magnetic conduction heating body to exchange heat.

Preferably, the magnetic conduction heating body includes the cylinder and the plate body that generates heat, the axial central point that generates heat the cylinder and install in pressure vessel puts, the plate body that generates heat is the annular around the cylinder that generates heat and distributes and has a plurality of, and the cylinder that generates heat is fixed through the inner wall connection of the plate body that generates heat and pressure vessel.

Preferably, the interior of the heating cylinder is a hollow structure.

Preferably, the magnetic conduction heating element is made of graphite steel.

Preferably, an insulating layer is further arranged between the electromagnetic induction coil and the pressure container, and a substance filled in the insulating layer comprises aluminum silicate or an aluminum silicate fiber blanket.

Preferably, the electromagnetic induction coil is uniformly wound on the heat insulation layer along the axial direction of the pressure vessel.

Preferably, the pressure vessel is made of austenitic stainless steel or nickel-based alloy steel.

Preferably, the electromagnetic induction coil is electrically connected with a variable frequency controller.

Preferably, the type of the variable frequency controller is an SPZ-300 intermediate frequency controller.

The use method of the electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment comprises the following steps:

step (A), mounting and fixing; firstly, an electromagnetic heating device is placed in a medium circulation pipeline to be heated, flanges at two ends of a pressure container are butted with pipeline flanges, and bolts are screwed;

step (B), adjusting the medium state; opening a pipeline valve to enable the medium in the pipeline to circulate, and continuously maintaining the circulation state;

step (C), calculating the power required by the electromagnetic heating device in the three processes before, during and after heating through the following formula (1), and turning on a variable frequency controller to adjust the power to the required power;

P＝C＊M＊△T＊1.2/(863＊H) (1)；

wherein, P is the power of the electromagnetic heating device; c is the specific heat of the heated medium; m mass of heated medium; Δ T is the temperature difference, i.e. the difference between the final temperature and the initial temperature of the heating medium; 1.2 is a safety margin coefficient; 863 is a unit conversion coefficient; h is the time required for heating the initial temperature to the set temperature;

before heating: step (C1), preheating, wherein preheating time and temperature are set, so that power required by the electromagnetic heating device for preheating is obtained, and the preheating power is set through a variable frequency controller;

step (C2) of switching on a power supply of the electromagnetic heating device;

step (C21), after the power supply is switched on, the current passes through the electromagnetic induction coil to generate an alternating magnetic field, when the magnetic force in the magnetic field passes through the magnetic conduction heating element, the alternating magnetic line of force penetrates through the magnetic conduction heating element to form a loop, so that induced current is generated in the cross section of the magnetic conduction heating element, and the induced current is called as eddy current;

step (C22), the atoms inside the magnetic conduction heating element move randomly at high speed by the eddy current, and the atoms collide and rub with each other to generate heat energy for heating the magnetic conduction heating element; the heated medium flows through the surface of the magnetic conductive heating element to absorb the heat on the surface of the magnetic conductive heating element to exchange heat;

step (C3), completing the preheating of the magnetic conduction heating element;

in the heating process: step (C4), heating, namely setting the heating time and temperature to obtain the power required by the electromagnetic heating device for heating, setting the heating power through a variable frequency controller, and repeating the step (C2) to finish the heating of the magnetic conductive heating element;

after heating: and (C5) heat supplementing, namely setting the time and the temperature of heat supplementing to obtain the power required by the heat supplementing of the electromagnetic heating device, setting the heat supplementing power through a variable frequency controller, and repeating the step (C2) to finish the heat supplementing of magnetic conduction heating.

Compared with the prior art, the invention has the advantages and benefits that:

1. the heater adopts the design of separating the functions of the pressure container and the magnetic conductive heating element, so that the heater is safer; the pressure container mainly plays a role of a transportation or circulation carrier, is pressure-bearing equipment, has high requirement on mechanical property, needs accurate temperature control and does not directly generate heat; the magnetic conduction heating element mainly plays a role in heating and heat exchange, does not meet the requirement of chemical performance and directly heats;

2. the heater adopts the pressure vessel made of austenitic stainless steel or nickel-based alloy steel to replace the carbon steel pressure vessel in the conventional electromagnetic heater; according to the GB150 standard, the use temperature of most carbon steel pressure vessels is low and very limited, and the medium temperature can not be used when the working condition is over 500 ℃ under the common condition; austenitic stainless steel and nickel-based alloy have excellent high-temperature performance; meanwhile, when the common carbon steel is used as a magnetic conductive heating body, the use temperature is not more than 600 ℃, once the temperature is exceeded, the carbon steel can be demagnetized, the coil load is short-circuited, and the heater is damaged;

3. the heater adopts graphite steel as a magnetic conductive heating body and is arranged in the pressure container according to a special shape; because the pressure vessel is made of austenitic stainless steel or nickel-based alloy steel, the magnetic conductivity is poor, and the pressure vessel cannot be used as a magnetic conduction heating body, graphite steel is used as the magnetic conduction heating body, the Curie temperature of graphite steel metal is high, demagnetization can occur only when the temperature exceeds 1000 ℃, the pressure vessel is a high-quality magnetic conduction heating body with the temperature of 0-1000 ℃ in a high-temperature working condition environment, the graphite steel magnetic conduction heating body adopts the structure layout shown in the drawing, the heat exchange area is large, and the heat exchange effect is excellent.

In conclusion, the invention adopts the design of separating the functions of the pressure container and the magnetic conductive heating body, so that the heater is safer, the heat load per unit area of the heater is large, the heat exchange area is large, the heating rate is high, the heating range is wide from 0 ℃ to 1000 ℃, the welding seams of the tube plate are few, the leakage hidden danger of the high-pressure environment is small, and the maintenance cost is low.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic overall side view of the present invention;

FIG. 3 is a schematic cross-sectional view of the inverter controller of the present invention with the inverter controller removed.

In the figure: 1. a shield; 2. a pressure vessel; 3. an electromagnetic induction coil; 4. a heat-insulating layer; 5. a variable frequency controller; 6. magnetic conduction heating element 61, heating column; 62. a heat-generating board body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the electromagnetic heating device comprises a pressure container 2 arranged in a shield 1, wherein the pressure container 2 is positioned at the axial center of the shield 1, an electromagnetic induction coil 3 is arranged in a gap between the pressure container 2 and the shield 1, a magnetic conduction heating body 6 is arranged in the pressure container 2, and the magnetic conduction heating body 6 is contacted with a medium circulating inside the magnetic conduction heating body for heat exchange.

Further, magnetic conduction heat-generating body 6 is including generating heat cylinder 61 and the plate body 62 that generates heat, the axial central point that generates heat cylinder 61 installs in pressure vessel 2 puts, the plate body 62 that generates heat is the annular around the cylinder 61 that generates heat and distributes and have a plurality of, and it is fixed with pressure vessel 2's interior wall connection that generates heat cylinder 61 passes through the plate body 62 that generates heat, adopt the design of pressure vessel and magnetic conduction heat-generating body function separation, and more safety, and the cylinder 61 that generates heat in the magnetic conduction heat-generating body 6 distributes with the plate body 62 that generates heat according to the special construction in the picture, not only the circulation of the medium of being convenient for, and heat transfer area is big, the heat transfer is effectual.

Further, the interior of the heating cylinder 61 is a hollow structure, which is convenient for medium circulation.

Furthermore, the magnetic conduction heating element 6 is made of graphite steel, the curie temperature of graphite steel metal is high, demagnetization can be caused when the temperature exceeds 1000 ℃, and the magnetic conduction heating element 6 is a high-quality magnetic conduction heating element 6 with the temperature of 0-1000 ℃ in a high-temperature working condition environment, so that the application temperature of the heater is high.

Further, an insulating layer 4 is arranged between the electromagnetic induction coil 3 and the pressure container 2, and the insulating layer 4 is filled with substances including aluminum silicate or aluminum silicate fiber blankets.

Further, the electromagnetic induction coil 3 is uniformly wound on the insulating layer 4 along the axial direction of the pressure vessel 2.

Furthermore, the pressure vessel 2 is made of austenitic stainless steel or nickel-based alloy steel, and the austenitic stainless steel and the nickel-based alloy have excellent high-temperature performance.

Further, the electromagnetic induction coil 3 is electrically connected with a variable frequency controller 5, and the power of the variable frequency controller 5 can be adjusted according to the actual installation working condition environment of the heater.

Further, the type of the variable frequency controller 5 is an SPZ-300 intermediate frequency controller, and the maximum input power of the variable frequency controller 5 is 300 KW; inputting three phases of 380V 50 or 60 HZ; the output frequency is 1-20 KHZ.

The use method of the electromagnetic heating device suitable for the high-temperature and high-pressure working condition environment comprises the following steps:

step (A), mounting and fixing; firstly, an electromagnetic heating device is placed in a medium circulation pipeline to be heated, flanges at two ends of a pressure container 2 are butted with pipeline flanges, and bolts are screwed;

step (B), adjusting the medium state; opening a pipeline valve to enable the medium in the pipeline to circulate, and continuously maintaining the circulation state;

step (C), calculating the power required by the electromagnetic heating device in the three processes before, during and after heating through the following formula (1), and turning on the frequency conversion controller 5 to adjust the power to the required power;

P＝C＊M＊△T＊1.2/(863＊H) (1)；

wherein, P is the power of the electromagnetic heating device; c is the specific heat of the heated medium; m mass of heated medium; Δ T is the temperature difference, i.e. the difference between the final temperature and the initial temperature of the heating medium; 1.2 is a safety margin coefficient; 863 is a unit conversion coefficient; h is the time required for heating the initial temperature to the set temperature;

before heating: step (C1), preheating, wherein preheating time and temperature are set, so that power required by the electromagnetic heating device for preheating is obtained, and the preheating power is set through the variable frequency controller 5;

step (C2) of switching on a power supply of the electromagnetic heating device;

step (C21), after the power is switched on, the current passes through the electromagnetic induction coil 3 to generate an alternating magnetic field, when the magnetic force in the magnetic field passes through the magnetic conduction heating element 6, the alternating magnetic lines of force penetrate through the magnetic conduction heating element 6 to form a loop, so that an induced current is generated in the cross section of the loop, and the induced current is called as an eddy current;

step (C22), the eddy current makes the atoms inside the magnetic conduction heating element 6 move randomly at high speed, and the atoms collide and rub with each other to generate heat energy for heating the magnetic conduction heating element 6; the heated medium flows through the surface of the magnetic conduction heating element 6 and absorbs the heat on the surface of the magnetic conduction heating element to exchange heat;

step (C3), completing the preheating of the magnetic conduction heating element 6;

in the heating process: step (C4), heating, namely setting the heating time and temperature to obtain the power required by the electromagnetic heating device for heating, setting the heating power through the variable frequency controller 5, and repeating the step (C2) to finish the heating of the magnetic conductive heating element 6;

after heating: and (C5) heat supplementing, namely setting the time and the temperature of heat supplementing to obtain the power required by the electromagnetic heating device for heat supplementing, setting the heat supplementing power through the variable frequency controller 5, repeating the step (C2), completing the heat supplementing of the magnetic conduction heating element 6, and reducing the heat loss or maintaining the temperature after the heating is stopped through the heat supplementing. The temperature in the step (C), before heating, during heating and after heating is determined according to actual conditions.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.