Electromagnetic vacuum heating furnace

Abstract

The utility model belongs to the technical field of vacuum heating furnaces, and particularly relates to an electromagnetic vacuum heating furnace which comprises a shell, a plurality of heating pipes are arranged in the shell, the interiors of the heating pipes are communicated with the exterior of the shell, intermediate media are filled in the shell, the heating pipes are located below the liquid level of the intermediate media, and electromagnetic coils are arranged in the heating pipes in a penetrating mode. An electromagnetic coil is arranged in the shell and circularly reciprocates in the length direction of the heating pipe to form an electromagnetic loop, a heat exchange assembly is further arranged in the shell and located above the heating pipe, a heated medium flows in the heat exchange assembly, a vacuum valve is installed on the top of the shell, a control system cabinet is arranged outside the shell, and the two ends of the electromagnetic coil are connected into the control system cabinet. According to the vacuum heating furnace, electromagnetic induction is adopted as a heat source for heating in the vacuum heating furnace, new energy is applied to a traditional heating furnace, and carbon emission is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum heating furnaces, and specifically relates to an electromagnetic vacuum heating furnace. Background Art

[0002] A vacuum heating furnace is a heating furnace used to heat substances such as crude oil, water, oil-gas mixture, or natural gas in oilfield oil-gas gathering and transportation operations. Traditional vacuum heating furnaces mostly obtain heat through fuel combustion. The heat is transferred to the intermediate medium water in the furnace body through the heating furnace fire tube and the smoke tube. The water is heated and boils, changing from the liquid phase to the vapor phase and evaporating. The water vapor gradually fills the vapor space of the furnace body. Since the temperature of the medium to be heated in the coil is much lower than the steam temperature, the steam condenses on the outer wall of the coil and transfers the heat to the medium to be heated in the coil. The condensed water falls back into the water bath space under the action of gravity, and so on, realizing the phase change heat transfer process.

[0003] For heating furnaces used in oilfields, the fuel has also been changed from natural gas to light or electricity. However, light energy is unstable and discontinuous and needs to be used in combination with other energy sources. Electric energy is relatively more stable. Currently, electric heaters are commonly used to heat the heating furnace, but the service life of electric heaters is relatively short and the reliability is not high. For the common electromagnetic heating method, since its coil is spirally wound outside the pipeline, the protection requirements for the coil are relatively high. Waterproofing is required, and the protective cover must be made of non-magnetic materials, etc. Therefore, the application range of electromagnetic heating is relatively small and it is difficult to be applied to a vacuum heating furnace as a heat source for heating. Summary of the Utility Model

[0004] In order to solve the problems in the above background art, the utility model provides an electromagnetic vacuum heating furnace, which realizes using electromagnetic induction as a heat source for heating in a vacuum heating furnace, applies new energy to a traditional heating furnace, and reduces carbon emissions.

[0005] The utility model provides an electromagnetic vacuum heating furnace, which includes a shell. A plurality of heating tubes are arranged inside the shell, and the inside of the heating tubes is communicated with the outside of the shell. An intermediate medium is filled in the shell, and the heating tubes are located below the liquid level of the intermediate medium. An electromagnetic coil is arranged inside the heating tubes, and the electromagnetic coil forms an electromagnetic loop in a cyclic and reciprocating manner along the length direction of the heating tubes. A heat exchange component is also arranged inside the shell, and the heat exchange component is located above the heating tubes. A medium to be heated flows inside the heat exchange component. A vacuum valve is installed at the top of the shell, and a control system cabinet is arranged outside the shell. Both ends of the electromagnetic coil are connected into the control system cabinet.

[0006] Further, a plurality of groups of electromagnetic coils are arranged, and the plurality of groups of electromagnetic coils are used in parallel.

[0007] Further, the heat exchange component includes at least one heat exchanger. The outlet end and the inlet end of the heat exchanger are both arranged outside the shell, and the heat exchanger is arranged as a pull-out structure.

[0008] Further, a plurality of heat exchangers are provided, and the plurality of heat exchangers are used in parallel.

[0009] Further, a make-up water pipe and a water level controller are provided on the housing.

[0010] Further, a programmable logic controller and a human-machine interface are provided in the control system cabinet, and a variety of communication protocols and Internet of Things terminals are configured.

[0011] Further, the housing is of a split structure. The housing includes a heat exchange housing located above and a heating housing located below. The heat exchange housing and the heating housing are connected by a corrugated pipe. The heating pipe and the electromagnetic coil are provided on the heating housing, and the heat exchange assembly and the vacuum valve are provided on the heat exchange housing.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] (1) The electromagnetic coil is arranged inside the heating pipe. By changing the winding method, the spiral winding is changed to a loop formed by reciprocating winding inside the heating pipe, generating electromagnetic induction to heat the heating pipe. The heat generated by electromagnetic induction heating is absorbed by the intermediate medium in the housing through the heating pipe, so that the temperature inside the heating pipe is maintained within a certain range, without affecting the use and life of the electromagnetic coil, with high heating efficiency, energy conservation and environmental protection.

[0014] (2) The electromagnetic coil adopts an internal structure inside the heating pipe, and there is no need to set a protective cover made of non-magnetic materials, with a compact structure, high safety, and convenient maintenance and repair.

[0015] (3) The programmable logic controller and the Internet of Things terminal provided in the control system cabinet can enable the mobile phone client to view, count, centrally monitor and uniformly manage the operating status and operating parameters of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the overall structure of an electromagnetic vacuum heating furnace for Embodiment 1;

[0018] Figure 2 For Figure 1 right view;

[0019] Figure 3 ForFigure 1 Left view;

[0020] Figure 4 Schematic diagram of the arrangement of the electromagnetic coil in the heating tube;

[0021] Figure 5 Schematic diagram of the overall structure of an electromagnetic vacuum heating furnace according to Embodiment 2;

[0022] Figure 6 is Figure 5 right view;

[0023] Explanation of reference numerals: 1, housing; 2, heating tube; 3, electromagnetic coil; 4, heat exchange component; 5, vacuum valve; 6, make-up water pipe; 7, water level controller; 8, control system cabinet; 9, bellows; 10, heat exchange housing; 11, heating housing. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present invention.

[0025] Next, in conjunction with the attached Figure 1 to the attached Figure 6 and specific embodiments, the present invention will be described in detail.

[0026] Embodiment 1

[0027] Referring to Figures 1-4 , an electromagnetic vacuum heating furnace provided in this embodiment includes a housing 1. A plurality of heating tubes 2 are horizontally fixedly connected in the lower space inside the housing 1. The inside of the heating tube 2 is communicated with the external space of the housing 1. An intermediate medium is filled in the housing 1. The heating tube 2 is located below the liquid level of the intermediate medium. In this embodiment, the intermediate medium is water. Therefore, the heating tube 2 is in the water bath space; an electromagnetic coil 3 is disposed in the heating tube 2. The electromagnetic coil 3 forms an electromagnetic circuit in a reciprocating manner along the length direction of the heating tube 2 in the heating tube 2. When the electromagnetic coil 3 is energized, the electromagnetic circuit can generate electromagnetic induction and heat the heating tube 2, so that the temperature of the heating tube 2 rises.

[0028] Furthermore, multiple groups of electromagnetic coils 3 can be provided, and multiple groups of electromagnetic coils 3 are used in parallel to improve the power of the heating furnace.

[0029] Inside the housing 1, a heat exchange assembly 4 is also provided. The heat exchange assembly 4 is located above the heating pipe 2. A heated medium flows inside the heat exchange assembly 4. The heat exchange assembly 4 includes at least one heat exchanger. The outlet end and the inlet end of the heat exchanger are both arranged outside the housing 1. The heat exchanger is arranged as a drawable structure, which is convenient for the replacement of the heat exchanger. The heat exchange assembly 4 can be used alone with one heat exchanger, or multiple heat exchangers can be used in parallel. Multiple heat exchangers can increase the heat exchange area, thereby improving the heat exchange efficiency. Specifically, the heat exchanger can be a coil heat exchanger or a shell-and-tube heat exchanger, and its shape and size can be set according to the actual situation.

[0030] After the electromagnetic coil 3 heats the heating pipe 2, the heating pipe 2 heats the intermediate medium water to generate water vapor. The water vapor undergoes condensation phase change heat exchange with the heat exchange assembly 4 to heat the heated medium inside the heat exchange assembly 4. The water vapor condenses on the surface of the heat exchange assembly 4 and drips into the water bath space. This process is achieved by the natural circulation of water and does not require external power.

[0031] A vacuum valve 5 is installed on the top of the housing 1. The vacuum valve 5 can control the discharge of gas inside the housing 1, thereby ensuring the vacuum degree inside the housing 1. A water supply pipe 6 and a water level controller 7 are also installed on the side wall of the housing 1. The water supply pipe 6 can supplement the intermediate medium inside the housing 1, and the water level controller 7 can timely detect the liquid level of the intermediate medium inside the housing 1 and control it within a certain range.

[0032] A control system cabinet 8 is also provided outside the housing 1. Both ends of the electromagnetic coil 3 are connected into the control system cabinet 8, and the control system cabinet 8 thus controls the energization and de-energization of the electromagnetic coil 3. Specifically, a programmable logic controller (PLC) and a human-machine interface (HMI) are arranged inside the control system cabinet 8 to realize the automatic control of the equipment. The start-stop of the equipment and the PID automatic adjustment of the heating power are controlled by the outlet temperature of the heated medium. After setting the outlet target temperature through the human-machine interface (HMI) during the operation process, one-key start can be achieved, and all other functions are completed by the control logic of the PLC without the need for the user to operate by themselves, which is simple and easy to implement. The operating status of the equipment, the operating parameters of the automation instruments, the power measurement data, and the fault alarm information, etc. can be viewed through the human-machine interface (HMI).

[0033] Multiple communication protocols such as TCP / IP and Modbus RTU are configured inside the control system cabinet 8. The operating status of the equipment, the parameters of each instrument, and the power data can be uploaded to the station control room, and the one-key start-stop function of the equipment can also be realized in the station control room, achieving unattended operation of the equipment. An Internet of Things terminal is also configured inside the control system cabinet 8. The operating status of the equipment, the parameters of each instrument, and the power data can be uploaded to the Internet of Things cloud platform, and the operating status and operating parameters of the equipment can be viewed through the mobile phone client, which is convenient for users to conduct centralized monitoring and unified management of the equipment.

[0034] The implementation principle of an electromagnetic vacuum heating furnace in Embodiment 1 is as follows: The electromagnetic coil 3 is powered on through the control system cabinet 8. After the electromagnetic coil 3 is powered on, electromagnetic induction is generated in the circuit, which is converted into heat energy on the tube wall of the heating tube 2 to increase the temperature of the heating tube 2. The heating tube 2 thus heats the intermediate medium water in the housing 1, generating water vapor to push the vacuum valve 5 to open and discharge the air in the upper space of the housing 1. The water vapor exchanges heat through condensation phase change with the heat exchange component 4, thereby heating the medium to be heated in the heat exchange component 4.

[0035] Embodiment 2

[0036] Refer to Figure 5 and Figure 6 In this embodiment, the difference from Embodiment 1 is that the housing 1 is a split structure. The housing 1 includes a heat exchange housing 10 located above and a heating housing 11 located below. The heat exchange housing 10 and the heating housing 11 are connected by a corrugated pipe 9. Specifically, the heating tube 2, the electromagnetic coil 3, the water supply pipe 6, and the water level controller 7 are arranged on the heating housing 11, and the heat exchange component 4 and the vacuum valve 5 are arranged on the heat exchange housing 10.

[0037] The above further describes the present invention with the aid of specific embodiments. However, it should be understood that this specific description should not be construed as a limitation on the essence and scope of the present invention. Various modifications made by those of ordinary skill in the art to the above embodiments after reading this specification all fall within the scope protected by the present invention.

Claims

1. An electromagnetic vacuum heating furnace, characterized in that, It includes a housing, within which a plurality of heating tubes are arranged. The interior of the heating tubes is in communication with the exterior of the housing. An intermediate medium is filled within the housing, and the heating tubes are located below the liquid level of the intermediate medium. An electromagnetic coil is threaded through the heating tubes, and the electromagnetic coil forms an electromagnetic circuit by circulating back and forth along the length direction of the heating tubes. A heat exchange component is also arranged within the housing, and the heat exchange component is located above the heating tubes. A medium to be heated flows within the heat exchange component. A vacuum valve is installed at the top of the housing, and a control system cabinet is arranged outside the housing. The two ends of the electromagnetic coil are connected into the control system cabinet.

2. The electromagnetic vacuum heating furnace according to claim 1, characterized in that, A plurality of groups of the electromagnetic coils are provided, and the plurality of groups of electromagnetic coils are used in parallel.

3. The electromagnetic vacuum heating furnace according to claim 1, characterized in that, The heat exchange component includes at least one heat exchanger. The outlet end and the inlet end of the heat exchanger are both arranged outside the housing, and the heat exchanger is arranged as a pull-out structure.

4. The electromagnetic vacuum heating furnace according to claim 3, characterized in that A plurality of the heat exchangers are provided, and the plurality of heat exchangers are used in parallel.

5. The electromagnetic vacuum heating furnace according to claim 1, characterized in that, A water replenishing pipe and a water level controller are arranged on the housing.

6. The electromagnetic vacuum heating furnace according to claim 1, wherein, A programmable logic controller and a human-machine interface are arranged within the control system cabinet, and it is configured with a variety of communication protocols and an Internet of Things terminal.

7. The electromagnetic vacuum heating furnace according to claim 1, characterized in that, The housing is of a split structure. The housing includes a heat exchange housing located above and a heating housing located below. The heat exchange housing and the heating housing are connected by a corrugated pipe. The heating tubes and the electromagnetic coils are arranged on the heating housing, and the heat exchange component and the vacuum valve are arranged on the heat exchange housing.

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