Anti-corrosion type heat recovery electric boiler

Abstract

The utility model discloses an anti -corrosion type heat recovery electric boiler relates to electric boiler technical field, including the nested setting shell and inner bag, and the shell and inner bag between filling have heat preservation material, and the inside bottom surface fixed connection of inner bag has the mount rack, is equipped with multiple sets electric heater on the mount rack, and the outer corrosion -resistant cover shell of electric heater outer cover is equipped with, and the bottom surface of mount rack is provided with the sealed cavity, and the vertical setting installation cylinder is fixedly connected in sealed cavity, and the first sealing sleeve in sealed cavity is set up to the installation cylinder upper segment. It has multiple anticorrosion guarantee, and the outer corrosion -resistant cover shell of ceramic material is equipped for electric heater outer cover, and the integral anticorrosion insulation treatment is carried out to the mount rack, fundamentally separates the contact of water medium and metal piece, effectively resists chlorine ion corrosion, oxygen corrosion and galvanic corrosion, greatly prolongs the service life of core heating element.

Description

Technical Field

[0001] This utility model relates to the field of electric boilers, and in particular to a corrosion-resistant heat recovery electric boiler. Background Technology

[0002] Boilers, as clean and efficient heating equipment, are widely used in heating, process heating, and domestic hot water supply. To improve energy efficiency, existing technologies often use external plate heat exchangers to recover waste heat from air compressors, industrial processes, and other equipment to preheat boiler feedwater, forming a heat recovery electric boiler system.

[0003] However, in the electric boiler body of such systems, the core heating component, the electric heater and its installation structure have long faced severe challenges. First, the electric heater is directly immersed in the water inside the boiler tank, and is susceptible to corrosion and scaling due to water quality such as chloride ions and dissolved oxygen, which leads to reduced efficiency, shortened lifespan, and even leakage risk. Secondly, the power supply leads for multiple electric heaters need to be drawn from the high-temperature, high-pressure, and potentially humid inner tank environment. Traditional sealing methods are not reliable enough and pose dual safety hazards of leakage, short circuit, and medium leakage.

[0004] In addition, galvanic corrosion may occur between the metal support of the electric heater and the inner tank and heating element, further aggravating structural damage. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a corrosion-resistant heat recovery electric boiler, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a corrosion-resistant heat recovery electric boiler includes a nested outer shell and an inner liner, with insulation material filling the space between the outer shell and the inner liner. A mounting frame is fixedly connected to the bottom surface of the inner liner, and multiple sets of electric heaters are mounted on the mounting frame. The electric heaters are covered with an outer corrosion-resistant sleeve. A sealing cavity is opened on the bottom surface of the mounting frame, and a vertically arranged mounting cylinder is fixedly connected to the sealing cavity. A first sealing sleeve located in the sealing cavity is fitted on the upper section of the mounting cylinder. A vertically arranged isolation cavity is opened on the bottom surface of the outer shell, and a second sealing sleeve is embedded in the isolation cavity. An outlet sleeve is fixedly connected to the bottom end of the mounting cylinder, and the outlet sleeve is vertically fitted with the second sealing sleeve. A connecting flange is provided at the bottom end of the outlet sleeve and the bottom end of the outer shell. A drying cavity is opened on the outside of the isolation cavity, and the drying cavity is filled with a desiccant.

[0007] As a further technical solution of this utility model, the mounting bracket is an overall anti-corrosion and insulating structure, and its surface is coated with a high-temperature epoxy ceramic coating. A high-temperature resistant mica gasket is embedded in the contact and fixing position between the mounting bracket and the bottom surface of the inner liner.

[0008] As a further technical solution of this utility model, the outer corrosion-resistant shell is a ceramic shell, and high-temperature thermally conductive silicone grease is filled between the inner side of the outer corrosion-resistant shell and the electric heater, and its upper and lower ends are sealed by rubber rings.

[0009] As a further technical solution of this utility model, the sealing cavity is a conical chamber with an arc transition between its bottom end and the mounting bracket, and the first sealing sleeve is correspondingly set as a conical sealing sleeve, located between the bottom surface of the mounting bracket and the bottom surface of the inner liner.

[0010] As a further technical solution of this utility model, the mounting cylinder, inner liner, and outer shell are all separated; the lead-out sleeve and mounting cylinder are an integral structure.

[0011] As a further technical solution of this utility model, the drying chamber is opened in an inverted "L" shape, with its top corner position communicating with the isolation chamber, and the bottom vertical section opening located on the outer surface of the outer shell, and an openable sealing plug is provided at the opening position.

[0012] As a further technical solution of this utility model, a set of miniature humidity sensors for monitoring the internal humidity is also provided inside the drying chamber.

[0013] As a further technical solution of this utility model, the inner liner has two sets of interfaces, one for inlet and one for outlet, on its side wall or bottom.

[0014] As a further technical solution of this utility model, the first sealing sleeve and the second sealing sleeve are made of fluororubber.

[0015] As a further technical solution of this utility model, the insulation material is a chlorine-free insulation material.

[0016] This utility model provides a corrosion-resistant heat recovery electric boiler, which has the following advantages compared with the prior art: 1. This design of a corrosion-resistant heat recovery electric boiler has multiple corrosion protections. By installing a corrosion-resistant ceramic outer shell around the electric heater and treating the mounting frame with overall corrosion protection and insulation, the contact between the water medium and the metal parts is fundamentally isolated, effectively resisting chloride ion corrosion, oxygen corrosion and galvanic corrosion, and greatly extending the service life of the core heating element.

[0017] 2. The corrosion-resistant heat recovery electric boiler designed in this paper has a through-type sealed channel consisting of a sealing cavity, a first sealing sleeve, an isolation cavity, a second sealing sleeve, and a lead-out sleeve. This structure provides an absolutely sealed path for the electric heater lead wire from the high-pressure water in the inner tank to the external environment, thereby eliminating the risk of water leakage from the inner tank and the intrusion of external moisture and ensuring electrical safety.

[0018] 3. This design of a corrosion-resistant heat recovery electric boiler, by installing a miniature humidity sensor in the drying chamber, can monitor the humidity status of the electrical connection area in real time, realizing a leap from passive sealing to active monitoring. It can issue an early warning in the early stage of seal failure, which is convenient for predictive maintenance and prevent problems before they occur.

[0019] 4. This design is a corrosion-resistant heat recovery electric boiler, in which the mounting frame integrates all electric heaters to form a modular component, which facilitates overall installation and subsequent maintenance. The electric heating leads are uniformly led out through the bottom connecting flange, which is convenient for wiring and has a compact and reasonable structure. Attached Figure Description

[0020] Figure 1 This is a front view of the structure of a corrosion-resistant heat recovery electric boiler; Figure 2 For a corrosion-resistant heat recovery electric boiler Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 For a corrosion-resistant heat recovery electric boiler Figure 1 Enlarged view of the structure at point B in the middle.

[0021] In the diagram: 1. Outer shell; 2. Inner liner; 3. Mounting bracket; 4. Electric heater; 5. Outer corrosion-resistant sleeve; 6. Sealing cavity; 7. Mounting sleeve; 8. Isolation cavity; 9. Second sealing sleeve; 10. Lead-out sleeve; 11. Connecting flange; 12. First sealing sleeve; 13. Drying cavity. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 This utility model provides a technical solution for a corrosion-resistant heat recovery electric boiler: it includes a nested outer shell 1 and an inner liner 2, with insulation material filling the space between the outer shell 1 and the inner liner 2, and an installation frame 3 fixedly connected to the bottom surface of the inner liner 2. Multiple sets of electric heaters 4 are equidistantly arranged on the installation frame 3, and an outer corrosion-resistant outer shell 5 is provided for the electric heaters 4. The bottom surface of the mounting bracket 3 is provided with a sealing cavity 6. A vertically arranged mounting cylinder 7 is fixedly connected inside the sealing cavity 6. The upper section of the mounting cylinder 7 is also fitted with a first sealing sleeve 12 located inside the sealing cavity 6. The bottom surface of the outer shell 1 is provided with a vertically arranged isolation cavity 8. A second sealing sleeve 9 is embedded in the isolation cavity 8. The bottom end of the mounting cylinder 7 is fixedly connected with a lead-out sleeve 10. The lead-out sleeve 10 is also vertically fitted with the second sealing sleeve 9. The bottom end of the lead-out sleeve 10 and the bottom end of the outer shell 1 are provided with a connecting flange 11. A drying cavity 13 is provided on the outside of the isolation cavity 8. like Figure 1-2 As shown, the mounting frame 3 includes a main frame that is attached to the bottom surface of the inner liner 2 in the middle section and an arc-shaped frame that is attached to the two sides of the inner liner 2 at both ends. The top surface of the mounting frame 3 has multiple sets of equidistant mounting openings corresponding to the electric heater 4. The mounting frame 3 is designed to be corrosion-resistant and insulated. Its surface is coated with a high-temperature epoxy ceramic coating. High-temperature resistant mica gaskets are embedded at the contact and fixing positions between the mounting frame 3 and the ground of the inner liner 2. The outer corrosion-resistant shell 5 is vertically fitted outside the electric heater 4. It is a ceramic shell. The inner side of the outer corrosion-resistant shell 5 and the electric heater 4 are filled with high-temperature thermally conductive silicone grease. Its upper and lower ends are sealed by rubber rings. like Figure 2-3 As shown, the sealing cavity 6 is a conical chamber with an arc transition between its bottom end and the mounting bracket 3. The first sealing sleeve 12 is a corresponding conical sealing sleeve located between the bottom surface of the mounting bracket 3 and the bottom surface of the inner liner 2. The mounting cylinder 7 is set separately and is separated from the inner liner 2 and the outer shell 1. The lead-out sleeve 10 is integrated with the mounting cylinder 7. The isolation cavity 8 is opened vertically upward and is separately separated in the cavity between the outer shell 1 and the inner liner 2. The second sealing sleeve 9 is located in the isolation cavity 8, and its two ends are sealed to the mounting cylinder 7.

[0024] like Figure 3 As shown, the drying chamber 13 is inverted in an "L" shape and is located outside the isolation chamber 8. Its top corner is connected to the isolation chamber 8, and the bottom vertical section opening is located on the outer surface of the outer shell 1. The drying chamber 13 is filled with desiccant, and a sealing plug is provided at the bottom vertical section opening. A set of miniature humidity sensors is also provided in the drying chamber 13.

[0025] This device is an external plate heat exchanger solution in the existing public technology. The bottom or side of the inner tank 2 has one inlet and one outlet interface, which are connected to the external heat recovery unit through pipes, forming a closed loop. Regarding the configuration and connection of the waste heat source loop, the high-temperature medium outlet of the waste heat source is connected to the "waste heat side" inlet of the plate heat exchanger through a pipe, while the "waste heat side" outlet of the plate heat exchanger returns to the waste heat source through a pipe, thereby achieving cooling of the waste heat source. The power of this loop may be provided by the pump of the waste heat source equipment itself, or an additional pump may be required. The circulation pump and control logic involved in this point are all existing public technologies, so they will not be described in detail here. The working principle of this utility model is as follows: the mounting frame 3 serves as a support structure to uniformly install and fix multiple sets of distributed electric heaters 4. The outer corrosion-resistant shell covering the electric heater 4 can effectively enhance the corrosion resistance of the electric heater 4. The installation position of the electric heater 4 is sealed by the first sealing sleeve 12 and the second sealing sleeve 9, thereby ensuring the corrosion resistance between the electric heater 4 and the mounting frame 3 and the overall device. The lead wire is connected and fixed to the outer shell 1 through the connecting flange 11.

[0026] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A corrosion-resistant heat recovery electric boiler, comprising a nested outer shell (1) and an inner liner (2), wherein the space between the outer shell (1) and the inner liner (2) is filled with insulation material, and a mounting frame (3) is fixedly connected to the bottom surface inside the inner liner (2), and multiple sets of electric heaters (4) are provided on the mounting frame (3), characterized in that: The electric heater (4) is covered with an outer corrosion-resistant shell (5); The bottom surface of the mounting bracket (3) is provided with a sealing cavity (6), and a vertically arranged mounting cylinder (7) is fixedly connected inside the sealing cavity (6). The upper section of the mounting cylinder (7) is fitted with a first sealing sleeve (12) located inside the sealing cavity (6). The bottom surface of the outer shell (1) is provided with a vertically arranged isolation cavity (8), and a second sealing sleeve (9) is embedded in the isolation cavity (8). The bottom end of the mounting sleeve (7) is fixedly connected to the lead-out sleeve (10), the lead-out sleeve (10) is vertically sleeved with the second sealing sleeve (9), and the bottom end of the lead-out sleeve (10) and the bottom end of the outer shell (1) are provided with a connecting flange (11). A drying chamber (13) is provided on the outside of the isolation chamber (8), and the drying chamber (13) is filled with a desiccant.

2. The corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The mounting bracket (3) is an anti-corrosion and insulation structure with a high-temperature epoxy ceramic coating on its surface. A high-temperature resistant mica gasket is embedded at the contact and fixing position between the mounting bracket (3) and the bottom surface of the inner liner (2).

3. The corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The outer corrosion-resistant shell (5) is a ceramic shell. The inner side of the outer corrosion-resistant shell (5) and the electric heater (4) are filled with high-temperature thermally conductive silicone grease, and its upper and lower ends are sealed by rubber rings.

4. The corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The sealing cavity (6) is a conical chamber with an arc transition between its bottom end and the mounting bracket (3). The first sealing sleeve (12) is correspondingly set as a conical sealing sleeve, located between the bottom surface of the mounting bracket (3) and the bottom surface of the inner liner (2).

5. A corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The mounting cylinder (7) is separated from the inner liner (2) and the outer shell (1); the lead-out sleeve (10) and the mounting cylinder (7) are an integral structure.

6. The corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The drying chamber (13) is opened in an inverted "L" shape, with its top corner connected to the isolation chamber (8), and the bottom vertical section opening located on the outer surface of the outer shell (1), and an openable sealing plug is provided at the opening position.

7. A corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The drying chamber (13) is also equipped with a set of miniature humidity sensors for monitoring its internal humidity.

8. A corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The inner liner (2) has two sets of interfaces, one for inlet and one for outlet, on its side wall or bottom.

9. A corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The first sealing sleeve (12) and the second sealing sleeve (9) are made of fluororubber.

10. A corrosion-resistant heat recovery electric boiler according to claim 1, characterized in that: The insulation material is a chlorine-free insulation material.

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