Electric heating steam generator

Abstract

The invention relates to the technical field of steam generators, in particular to an electric heating steam generator which comprises an electric heating unit, a steam box is fixedly installed on one side of the electric heating unit, a steam outlet pipe is fixedly installed on the side, away from the electric heating unit, of the steam box, and a heating cavity is formed in the electric heating unit; compared with the prior art, the steam box is arranged on the electric heating unit, and the heating cavity and the electric heating piece are arranged in the electric heating unit, so that the purpose of generating steam by using electric energy can be well achieved, no smoke is generated, meanwhile, the heat energy utilization rate is high, and the energy-saving and environment-friendly properties are remarkably improved; a plurality of steam pipes in the earlier stage of research and development are changed into the steam box with the large diameter, the steam discharging efficiency can be effectively improved, too fast evaporation of water in the box can be avoided by increasing the size of the water collecting box and reducing the number of the water collecting box, and therefore the phenomenon of uneven evaporation capacity is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of steam generators, in particular to an electrically heated steam generator. Background Art

[0002] A steam generator is a heat energy conversion device that heats the water flowing in the pipe into steam and quickly outputs the steam to the outside. As the amount of steam increases, its volume and water capacity must also increase. When the water capacity exceeds 30L, it falls into the category of boilers of special equipment that need to be included in the national quality and technical supervision and management. Therefore, in order to ensure the safety of use, the state limits the total volume to less than 30 liters. Only when it is below 30 liters can the safety of use and the stability of steam output be guaranteed.

[0003] At present, in the prior art, traditional steam generators within 30L are usually heated by fuel combustion. In this process, there is a certain amount of heat loss, the energy-saving effect is not good, and a large amount of smoke is generated after combustion, which is not environmentally friendly. The corresponding smoke generation also needs to be equipped with smoke treatment equipment, which further increases the production cost. During the research and development process, the inventor developed a steam generator heated by an electric heater and applied for an electric steam generator. However, the electric steam generator is a first-generation product and has certain technical defects. For example, the structure of multiple evaporation tubes vertically arranged on a water collecting tank causes the water in the water collecting tank to evaporate too quickly, while the volume of the evaporation tube is small and cannot meet the rapid discharge of steam, resulting in uneven evaporation. For this reason, the present invention proposes an electrically heated steam generator. Summary of the invention

[0004] The object of the present invention is to provide an electrically heated steam generator to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an electrically heated steam generator, comprising an electric heating unit, a steam box is fixedly installed on one side of the electric heating unit, a steam outlet pipe is fixedly installed on the side of the steam box away from the electric heating unit, a heating chamber is arranged in the electric heating unit, the electric heating element comprises a mounting plate fixedly installed on the electric heating unit and an electric heating tube fixedly installed on the mounting plate, and the electric heating tube is arranged in the heating chamber, and a liquid level monitoring tube is installed between the electric heating unit and the steam box.

[0006] As a preferred technical solution of the present invention, a water inlet pipe is fixedly installed on the electric heating unit, and the lower end of the liquid level monitoring tube is fixedly installed on the water inlet pipe.

[0007] As a preferred technical solution of the present invention, the electric heating unit includes a first water collecting tank, and the first water collecting tank is arranged horizontally.

[0008] As a preferred technical solution of the present invention, there are multiple first water collecting tanks, the multiple first water collecting tanks are vertically distributed, and adjacent first water collecting tanks are connected through first connecting pipes.

[0009] As a preferred technical solution of the present invention, a first mounting opening is opened on one side of the first water collecting tank, and the mounting plate is fixedly mounted on the first mounting opening.

[0010] As a preferred technical solution of the present invention, second installation openings are opened on both sides of the first water collecting tank, the number of the installation plates and electric heating tubes is the same as the number of the second installation openings, and the installation plates are fixedly installed on the second installation openings.

[0011] As a preferred technical solution of the present invention, the electric heating unit also includes a water collecting branch box, which is arranged horizontally, a steam branch pipe is fixedly installed on one side of the water collecting branch box, and the side of the steam branch pipe away from the water collecting branch box is fixedly installed on the steam box.

[0012] As a preferred technical solution of the present invention, there are multiple water collecting branch boxes, the multiple water collecting branch boxes are vertically distributed, and adjacent water collecting branch boxes are connected through a third connecting pipe.

[0013] As a preferred technical solution of the present invention, the electric heating unit includes a second water collecting tank, and the second water collecting tank is arranged vertically, and the steam box is fixedly installed on one side of the top of the second water collecting tank.

[0014] As a preferred technical solution of the present invention, the water collecting branch box is connected to the first water collecting tank via a second connecting pipe.

[0015] As a preferred technical solution of the present invention, the shape of the steam box is one of a straight line, an L shape, a Z shape or a T shape.

[0016] As a preferred technical solution of the present invention, a liquid level probe mounting tube is provided on the liquid level monitoring tube for fixed installation of the liquid level probe, and the liquid level probe is arranged in the liquid level monitoring tube.

[0017] As a preferred technical solution of the present invention, a pressure valve installation pipe is provided on one side of the steam box for fixed installation of the pressure valve.

[0018] As a preferred technical solution of the present invention, a support base is fixedly installed on the bottom of the electric heating unit.

[0019] As a preferred technical solution of the present invention, a water baffle is fixedly installed inside the steam box, and steam holes are opened on the inner surface of the water baffle.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The electrically heated steam generator of the present invention can achieve the purpose of utilizing electric energy to produce steam by providing a steam box on the electric heating unit and arranging a heating chamber and an electric heating element in the electric heating unit, without generating smoke, and at the same time, the thermal energy utilization rate is high, and the energy saving and environmental protection are significantly improved. At the same time, the multiple steam pipes in the early stage of research and development are replaced by a steam box with a larger diameter, which can effectively improve the steam discharge efficiency. The increase in the volume of the water collecting tank and the reduction in the number can also avoid the water in the tank from evaporating too quickly, thereby effectively solving the problem of uneven evaporation. In addition, the liquid level monitoring tube can be used to monitor the liquid level in the steam generator in real time, so that when the amount of water to be heated is small, the electrical signal can be transmitted to the DCS control system to realize the control and adjustment of the water inlet time of the water inlet pipe, thereby achieving the purpose of automatic water replenishment.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the electric heating element of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention;

[0027] Figure 5 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention;

[0028] Figure 6 This is a schematic diagram of the overall structure of Embodiment 5 of the present invention;

[0029] Figure 7 This is a schematic diagram of the overall structure of Embodiment 6 of the present invention;

[0030] Figure 8 It is a schematic diagram of the installation structure of the water retaining plate of the present invention;

[0031] In the figure: 1. electric heating unit; 2. steam box; 21. water baffle; 22. steam hole; 3. steam outlet pipe; 4. electric heating element; 41. mounting plate; 42. electric heating pipe; 5. water inlet pipe; 6. liquid level monitoring pipe; 7. support seat; 8. liquid level probe mounting pipe; 9. pressure valve mounting pipe; 11. first water collecting tank; 121. second connecting pipe; 122. first connecting pipe; 123. third connecting pipe; 131. water collecting branch box; 132. steam branch pipe; 15. second water collecting tank. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] For example, see Figure 1 , 2In the present embodiment, an electrically heated steam generator is provided, comprising an electric heating unit 1, a steam box 2 is fixedly mounted on one side of the electric heating unit 1, a water baffle 21 is fixedly mounted inside the steam box 2, and a steam hole 22 is provided on the inner surface of the water baffle 21, the shape of the steam box 2 is a straight line, an L-shape, a Z-shape or a T-shape, a steam outlet pipe 3 is fixedly mounted on the side of the steam box 2 away from the electric heating unit 1, a heating chamber is provided in the electric heating unit 1, and the electric heating element 4 comprises a mounting plate 41 fixedly mounted on the electric heating unit 1 and a fixed An electric heating tube 42 is mounted on the mounting plate 41, and the electric heating tube 42 is arranged in the heating chamber. A liquid level monitoring tube 6 is installed between the electric heating unit 1 and the steam box 2. A water inlet pipe 5 is also fixedly mounted on the electric heating unit 1, and the lower end of the liquid level monitoring tube 6 is fixedly mounted on the water inlet pipe 5. A liquid level probe mounting tube 8 is arranged on the liquid level monitoring tube 6 for fixed installation of the liquid level probe. The liquid level probe is arranged in the liquid level monitoring tube 6. An electric valve is installed on the water inlet pipe 5, and the electric valve is electrically connected to the liquid level probe on the liquid level monitoring tube 6 through a control system. The steam box A pressure valve mounting pipe 9 is provided on one side of the electric heating unit 2 for fixed installation of the pressure valve. A support seat 7 is fixedly installed on the bottom of the electric heating unit 1. The electric heating unit 1 includes a first water collecting tank 11, and the first water collecting tank 11 is arranged horizontally. A first mounting port is opened on one side of the first water collecting tank 11, and a mounting plate 41 is fixedly installed on the first mounting port. By arranging a steam box 2 on the electric heating unit 1 and arranging a heating chamber and an electric heating element 4 in the electric heating unit 1, the purpose of using electric energy to produce steam can be well achieved without generating smoke. At the same time, the heat energy is utilized The utilization rate is high, and energy conservation and environmental protection are significantly improved. At the same time, the multiple steam pipes in the early stage of research and development are replaced by a steam box with a larger diameter, which can effectively improve the steam discharge efficiency. The increase in the volume of the water collecting tank and the reduction in the number can also avoid the water in the box from evaporating too quickly, thereby effectively solving the problem of uneven evaporation. In addition, the liquid level monitoring tube 6 can be used to monitor the liquid level in the steam generator in real time. When the amount of water to be heated is small, the electrical signal can be transmitted to the DCS control system to realize the control and adjustment of the water inlet time of the water inlet pipe 5, thereby achieving the purpose of automatic water replenishment.

[0036] For example 2, please refer to Figure 2 , 3 And 8, in this embodiment, there are multiple first water collecting tanks 11, and the multiple first water collecting tanks 11 are vertically distributed, and adjacent first water collecting tanks 11 are connected through the first connecting pipes 122. By increasing the number of first water collecting tanks 11, the water capacity of the entire steam generator can be provided, thereby effectively improving its evaporation capacity.

[0037] For example 3, please refer to Figure 2 , 4and 8. In the present embodiment, the electric heating unit 1 further comprises a water collecting branch box 131, which is arranged horizontally. A steam branch pipe 132 is fixedly mounted on one side of the water collecting branch box 131, and the steam branch pipe 132 is fixedly mounted on the steam box 2 on the side away from the water collecting branch box 131. It should be noted that in the present embodiment, the number and position arrangement of the water collecting branch boxes 131 are not limited. Therefore, the number of water collecting branch boxes 131 can be increased and they can be reasonably arranged on both sides or one side of the first water collecting box 11. For the specific one side, please refer to the fourth embodiment. By increasing the water collecting branch box 131, the water capacity of the entire steam generator can be provided, thereby effectively increasing its evaporation amount, and compared with the second embodiment, the height of the entire steam generator will not be too high.

[0038] Example 4, please refer to Figure 2 , 5 and 8. In this embodiment, there are multiple water collecting branch boxes 131, and the multiple water collecting branch boxes 131 are vertically distributed. Adjacent water collecting branch boxes 131 are connected through the third connecting pipe 123.

[0039] For example 5, please refer to Figure 2 , 6 and 8. In this embodiment, the electric heating unit 1 includes a second water collecting tank 15, and the second water collecting tank 15 is arranged vertically, and the steam box 2 is fixedly installed on the top side of the second water collecting tank 15. The water collecting branch box 131 is connected to the first water collecting tank 11 through the second connecting pipe 121. In this embodiment, the second water collecting tank 15 is arranged vertically, and the steam box 2 is installed on the side of the second water collecting tank 15. When multiple water collecting tanks are needed, compared with the second embodiment, it can effectively reduce the overall height of the entire device.

[0040] Example 6, please refer to Figure 1 , 7 And 8, in this embodiment, second installation ports are opened on both sides of the first water collecting tank 11, the number of installation plates 41 and electric heating tubes 42 is the same as the number of the second installation ports, and the installation plate 41 is fixedly installed on the second installation port. Among them, this embodiment adopts the method of lengthening the size of the first water collecting tank 11 and then installing electric heating elements 4 at both ends thereof. While ensuring sufficient water capacity, the design height of the entire steam generator can be further reduced.

[0041] 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 electrically heated steam generator, characterized in that: The invention comprises an electric heating unit (1), a steam box (2) is fixedly mounted on one side of the electric heating unit (1), a steam outlet pipe (3) is fixedly mounted on the side of the steam box (2) away from the electric heating unit (1), a heating chamber is arranged in the electric heating unit (1), the electric heating element (4) comprises a mounting plate (41) fixedly mounted on the electric heating unit (1) and an electric heating tube (42) fixedly mounted on the mounting plate (41), and the electric heating tube (42) is arranged in the heating chamber, and a liquid level monitoring tube (6) is installed between the electric heating unit (1) and the steam box (2).

2. An electrically heated steam generator according to claim 1, characterized in that: A water inlet pipe (5) is also fixedly mounted on the electric heating unit (1), and the lower end of the liquid level monitoring pipe (6) is fixedly mounted on the water inlet pipe (5).

3. An electrically heated steam generator according to claim 1, characterized in that: The electric heating unit (1) comprises a first water collecting tank (11), and the first water collecting tank (11) is arranged horizontally.

4. An electrically heated steam generator according to claim 3, characterized in that: There are a plurality of first water collecting tanks (11), the plurality of first water collecting tanks (11) are distributed vertically, and adjacent first water collecting tanks (11) are connected via first connecting pipes (122).

5. An electrically heated steam generator according to claim 3, characterized in that: A first mounting opening is provided on one side of the first water collecting box (11), and the mounting plate (41) is fixedly mounted on the first mounting opening.

6. An electrically heated steam generator according to claim 3, characterized in that: Second installation openings are provided on both sides of the first water collecting tank (11); the number of the installation plates (41) and the electric heating tubes (42) is the same as the number of the second installation openings; and the installation plates (41) are fixedly mounted on the second installation openings.

7. An electrically heated steam generator according to claim 3, characterized in that: The electric heating unit (1) further comprises a water collecting branch box (131), wherein the water collecting branch box (131) is arranged horizontally, a steam branch pipe (132) is fixedly mounted on one side of the water collecting branch box (131), and a side of the steam branch pipe (132) away from the water collecting branch box (131) is fixedly mounted on the steam box (2).

8. An electrically heated steam generator according to claim 7, characterized in that: There are a plurality of water collecting branch boxes (131), the plurality of water collecting branch boxes (131) are distributed vertically, and adjacent water collecting branch boxes (131) are connected via a third connecting pipe (123).

9. An electrically heated steam generator according to claim 1, characterized in that: The electric heating unit (1) comprises a second water collecting tank (15), and the second water collecting tank (15) is arranged vertically, and the steam box (2) is fixedly installed on one side of the top of the second water collecting tank (15).

10. An electrically heated steam generator according to claim 7, characterized in that: The water collecting branch box (131) is connected to the first water collecting box (11) via a second connecting pipe (121).

11. An electrically heated steam generator according to claim 1, characterized in that: The shape of the steam box (2) is one of a straight line, an L-shape, a Z-shape or a T-shape.

12. An electrically heated steam generator according to claim 2, characterized in that: The liquid level monitoring tube (6) is provided with a liquid level probe mounting tube (8) for fixedly mounting a liquid level probe, and the liquid level probe is arranged in the liquid level monitoring tube (6).

13. An electrically heated steam generator according to claim 1, characterized in that: A pressure valve installation pipe (9) is provided on one side of the steam box (2) for fixed installation of the pressure valve.

14. An electrically heated steam generator according to claim 1, characterized in that: A support base (7) is fixedly mounted on the bottom of the electric heating unit (1).

15. An electrically heated steam generator according to claim 1, characterized in that: A water baffle (21) is fixedly installed inside the steam box (2), and a steam hole (22) is provided on the inner surface of the water baffle (21).

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