An electromagnetic induction steam boiler

Abstract

The invention discloses an electromagnetic induction steam boiler, comprising a base, a header and a drum, wherein the drum is located in the upper middle part of the header, and the header is fixedly provided with a plurality of rows of ascending pipes and descending pipes along the length direction, wherein the upper ends of the ascending pipes and descending pipes are bent inwards and communicated with the drum, and the ascending pipes and descending pipes are arranged in a staggered manner, and an electric induction heater is installed on the outside of the ascending pipe, and the electric induction heater comprises an induction coil, which is an arc-shaped structure with one side open, and a steam-water separator is installed on the upper part of the inner cavity of the drum, and water level gauges are respectively installed at high and low positions on both sides of the drum, and a steam outlet is provided in the upper middle part of the drum. Electric induction heating adopts a non-contact method, and generates eddy current electric heating on the metal tube wall through the alternating magnetic field generated by high-frequency electricity, and the medium in the heating tube is heated, which is not only safe to operate and convenient to repair, but also can greatly increase the capacity of the electric heating boiler, and the arc-shaped coil structure of the electric induction heater is convenient for disassembly and assembly during maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of steam furnaces, in particular to an electromagnetic induction steam boiler. Background Art

[0002] Steam boilers are widely used in industrial and civil fields. In response to environmental protection requirements, coal-fired boilers have basically stopped using, except for large power plants that are equipped with perfect environmental protection measures. Gas boilers are now widely used. Although emissions have been greatly improved, with the increasing environmental protection requirements, the difficulty is also increasing, especially natural gas boilers, which have high operating costs and little room for thermal efficiency improvement. At present, the environmental protection measures of large power plants are constantly being strengthened. Coupled with the large-scale use of green electricity, the environmental protection of electricity is becoming stronger and stronger. Electric heating boilers themselves have the characteristics of low pollution and flexible adjustment, becoming a better choice. Commonly used resistance boilers and electrode boilers, electrical components are directly in contact with the medium, requiring a large water volume, limiting the capacity of the boiler, and difficult to repair and maintain. At present, steam boilers also use coils to achieve non-contact induction heating, but after the spiral induction coil is installed on the pipeline, it is difficult to disassemble and repair. Summary of the invention

[0003] The object of the present invention is to provide an electromagnetic induction steam boiler to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electromagnetic induction steam boiler, comprising a base, a header and a boiler drum, the boiler drum is located in the upper middle part of the header, the header is fixedly installed with a plurality of rows of risers and downcomers along the length direction, the upper ends of the risers and downcomers are bent inward and connected to the boiler drum, the risers and downcomers are arranged alternately, an electric induction heater is installed on the outside of the riser, the electric induction heater comprises an induction coil, the induction coil is an arc-shaped structure with one side open, a steam-water separator is installed on the upper part of the inner cavity of the boiler drum, water level gauges are installed at high and low positions on both sides of the boiler drum, and a steam outlet is provided in the upper middle part of the boiler drum.

[0005] Preferably, an outer cover is installed between the outer side of the boiler drum and the upper side of the header, and a plurality of inspection holes are provided on the side of the outer cover.

[0006] Preferably, the outer sides of the header, boiler drum, riser and downcomer are all provided with a thermal insulation layer.

[0007] Preferably, a sewage outlet is provided at the bottom of the header, and a water inlet is provided at the side of the header.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: electric induction heating adopts a non-contact method, and generates eddy current electric heating on the metal pipe wall through the alternating magnetic field generated by high-frequency electricity, thereby heating the medium in the pipe. It is not only safe to operate and convenient to maintain, but also has an arc-shaped coil structure with one side open for easy disassembly and maintenance. The staggered arrangement of the ascending pipe and the descending pipe is conducive to ensuring good water circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention;

[0010] Figure 2 It is a schematic diagram of the side section structure of the present invention;

[0011] Figure 3 Schematic diagram of the coil structure of the electric induction heater.

[0012] In the figure: 1. base; 2. header; 3. boiler drum; 4. steam-water separator; 5. steam outlet; 6. water level gauge; 7. outer cover; 8. riser; 9. electric induction heater; 10. inspection hole; 11. downcomer. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] See also Figure 1-3 The present invention provides a technical solution: an electromagnetic induction steam boiler, comprising a base 1, a header 2 and a drum 3, the drum 3 is located in the upper middle part of the header 2, a sewage outlet is arranged at the bottom of the header 2, a water inlet is arranged on the side of the header 2, and the header 2 is fixedly installed with a plurality of rows of risers 8 and downcomers 11 along the length direction, the upper ends of the risers 8 and downcomers 11 are bent inward and connected with the drum 3, when the boiler is working, hot water and steam flow upward along the risers 8, and low-temperature water flows downward through the downcomers 11 due to the density difference, forming a natural circulation, and the risers 8 and downcomers 11 are arranged horizontally and transversely in an interlaced manner to ensure good water circulation. A covering outer cover 7 is installed between the outer side of the drum 3 and the upper side of the header 2, and a plurality of inspection holes 10 are arranged on the side of the outer cover 7, so as to observe the operation status in the furnace at any time, and can be opened when the furnace is shut down for maintenance.

[0015] The outer sides of the header 2, the boiler drum 3, the riser 8 and the downcomer 11 are all provided with a heat-insulating layer to reduce heat loss and improve thermal efficiency. An electric induction heater 9 is installed on the outside of the riser 8. The electric induction heater 9 includes an induction coil. The induction coil is an arc-shaped structure with one side open, which is convenient for overall disassembly and assembly during maintenance. A steam-water separator 4 is installed on the upper part of the inner cavity of the boiler drum 3. The steam-water separator 4 is used to improve the dryness of the steam. Water level gauges 6 are installed at high and low positions on both sides of the boiler drum 3, and a steam outlet 5 is provided in the middle of the upper side of the boiler drum 3.

[0016] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic induction steam boiler, comprising a base (1), a header (2) and a boiler drum (3), characterized in that: The boiler drum (3) is located in the upper middle part of the header (2). The header (2) is fixedly provided with a plurality of rows of ascending pipes (8) and descending pipes (11) along the length direction. The upper ends of the ascending pipes (8) and descending pipes (11) are bent inward and communicated with the boiler drum (3). The ascending pipes (8) and descending pipes (11) are arranged in a staggered manner. An electric induction heater (9) is installed outside the ascending pipe (8). The electric induction heater (9) includes an induction coil. The induction coil is an arc-shaped structure with one side open. A steam-water separator (4) is installed in the upper part of the inner cavity of the boiler drum (3). Water level gauges (6) are installed at high and low positions on both sides of the boiler drum (3). A steam outlet (5) is provided in the upper middle part of the boiler drum (3).

2. The electromagnetic induction steam boiler according to claim 1, characterized in that: An outer cover (7) is installed between the outer side of the boiler drum (3) and the upper side of the header (2), and a plurality of inspection holes (10) are provided on the side of the outer cover (7).

3. The electromagnetic induction steam boiler according to claim 2, characterized in that: The outer sides of the header (2), the boiler drum (3), the ascending pipe (8) and the downcomer (11) are all provided with a thermal insulation layer.

4. The electromagnetic induction steam boiler according to claim 3, characterized in that: A sewage outlet is provided at the bottom of the header box (2), and a water inlet is provided at the side of the header box (2).

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