Water-cooled flue gate plate for calcining furnace flue outlet
By introducing a water-cooled design and an electric hoist drive into the flue damper at the flue outlet of the calcining furnace, the problems of sealing, operational flexibility, corrosion resistance, and thermal expansion and contraction were solved, thereby improving the service life of the equipment and the continuity of production.
Patent Information
- Application Number
- CN202423027503.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing flue dampers in calcining furnaces suffer from insufficient sealing performance, poor operational flexibility, poor corrosion resistance, poor thermal shock resistance, large expansion coefficient, and high maintenance costs, resulting in short equipment lifespan and poor production continuity.
The water-cooled design improves the heat resistance and operational flexibility of the gate by casting heat exchange tubes inside the gate body and fixing a frame inside the outer shell, combined with an electric hoist drive, reducing the impact of thermal expansion and contraction and simplifying the transmission mechanism.
It improves the sealing performance and service life of the gate, reduces actuator failures, lowers maintenance costs, and enhances operational reliability and efficiency.
Smart Images
Figure CN223500156U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of flue damper technology, specifically a water-cooled flue damper for the flue outlet of a calcining furnace. Background Technology
[0002] A flue damper is a device installed in a flue to control the flow of flue gas. It is commonly used in industrial furnaces, boilers, and other equipment to regulate flue gas emissions or cut off the flow of flue gas when necessary. Flue dampers can be designed manually, electrically, or pneumatically, with the appropriate form chosen based on the specific application and requirements. In the carbon industry, castable flue dampers are most commonly used. Castable refractory materials are granular and powdered materials made from refractory materials with a certain amount of binder. They have high fluidity and are suitable for casting into unshaped refractory materials, but their wear resistance is poor. Furthermore, the inconsistent quality of castable refractory materials on the market significantly impacts product quality. Currently, the industry designs the shape and size of flue dampers according to the flue outlet dimensions, and they are generally used with electrically operated actuators.
[0003] The aforementioned flue damper has the following problems: 1. Insufficient sealing performance, which easily leads to inaccurate negative pressure control in the calcining furnace; 2. Poor operational flexibility, which easily leads to damage and jamming of the actuator transmission components; 3. Poor corrosion resistance, which causes the damper and equipment to corrode and be damaged under the action of flue gas, shortening their service life; 4. Poor thermal shock resistance, which easily causes cracks and breaks at the interface between high-temperature flue gas and outside air; 5. Poor expansion coefficient, which makes the flue damper prone to jamming due to thermal expansion and contraction, making the damper inoperable; 6. High maintenance costs, which not only affect the continuity of production but also increase the company's operating costs. In order to solve the above problems, a water-cooled flue damper at the flue outlet of the calcining furnace is proposed. Utility Model Content
[0004] The purpose of this utility model is to solve the above problems by providing a water-cooled flue damper at the outlet of a calcining furnace flue, comprising:
[0005] The mounting frame has two baffles welded in the middle inside, and a gate body is slidably connected between the two baffles. The gate body also includes an outer shell, and a frame is fixedly installed inside the outer shell. A heat exchange tube is fixedly installed inside the frame. Water inlet and water outlet are respectively provided on the left and right sides of the upper surface of the gate body. The two ends of the heat exchange tube are connected to the water inlet and water outlet respectively.
[0006] The above technical solution involves designing pipelines before casting the gate, casting them inside the gate body in the form of heat exchange pipes, and leaving inlet and outlet water outlets to reduce the gate's thermal expansion due to high-temperature flue gas.
[0007] In a preferred embodiment, the heat exchange tube has a "U" shaped structure.
[0008] The above technical solution improves the contact surface between the heat exchange tube and the gate body.
[0009] In a preferred embodiment, the outer wall of the mounting bracket is wrapped with a high-temperature resistant film.
[0010] The above technical solution uses a high-temperature resistant film to counteract thermal expansion and contraction.
[0011] In a preferred embodiment, an electric hoist is fixedly mounted on the top of the mounting frame, and a fixed base is integrally provided on the top of the gate body. The traction chain of the electric hoist is fixedly connected to the top of the fixed base.
[0012] The above technical solution uses an electric hoist to drive the gate body to rise and fall. Compared with the traditional screw drive, this reduces the failure of the actuator, improves work efficiency, and is simple, convenient, and more reliable.
[0013] In a preferred embodiment, mounting slots are provided on both the left and right sides of the mounting bracket.
[0014] In a preferred embodiment, the frame further includes a vertical rod, the vertical rod having two horizontal rods integrally formed at its center and perpendicular to it.
[0015] In a preferred embodiment, both the vertical and horizontal bars have connection holes on their outer walls that are adapted to the heat exchange tubes.
[0016] In summary, due to the adoption of the above technical solutions, the beneficial effects of this utility model are: this utility model proposes a water-cooled flue gate at the outlet of a calcining furnace flue.
[0017] 1. Before casting the gate, design the pipeline and cast it inside the gate body in the form of heat exchange tubes, leaving inlet and outlet to reduce the gate's thermal expansion due to high temperature flue gas.
[0018] 2. First, fix and install the frame inside the outer shell, and then pour the concrete inside the outer shell to improve the service life of the gate.
[0019] 3. The gate body is raised and lowered by an electric hoist. Compared with the traditional screw drive, this method reduces the failure of the actuator, improves work efficiency, and is simple, convenient and reliable to operate. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a schematic diagram of the internal structure of the gate body in this utility model;
[0022] Figure 3 This is a schematic diagram of the skeleton structure in this utility model.
[0023] The markings in the diagram are: 1-mounting bracket; 2-baffle; 3-gate body; 4-outer shell; 5-frame; 6-heat exchange tube; 7-inlet; 8-outlet; 9-vertical rod; 10-horizontal rod; 11-connection hole; 12-fixed base; 13-electric hoist; 14-mounting groove. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] The following will combine Figure 1-3 A detailed description is provided of a water-cooled flue gate at the outlet of a calcining furnace according to an embodiment of this utility model.
[0026] Example:
[0027] A water-cooled flue damper at the outlet of a calcining furnace flue includes:
[0028] Mounting frame 1 has two baffles 2 welded in the middle of its interior. The outer wall of mounting frame 1 is wrapped with a high-temperature resistant film. The high-temperature resistant film is used to counteract thermal expansion and contraction. Mounting slots 14 are opened on both the left and right sides of mounting frame 1.
[0029] A gate body 3 is slidably connected between two baffles 2. The gate body 3 also includes an outer shell 4. A frame 5 is fixedly installed inside the outer shell 4. The frame 5 also includes a vertical rod 9. Two horizontal rods 10 are integrally installed in the middle of the vertical rod 9 and perpendicular to it. A heat exchange tube 6 is fixedly installed inside the frame 5. The heat exchange tube 6 has a "U" shaped structure to increase the contact surface between the heat exchange tube 6 and the gate body 1. The upper surface of the gate body 3 is provided with an inlet 7 and an outlet 8 on the left and right sides respectively. The outer walls of the vertical rod 9 and the horizontal rod 10 are provided with connection holes 11 that are adapted to the heat exchange tube 6. The two ends of the heat exchange tube 6 are connected to the inlet 7 and the outlet 8 respectively. The pipeline is designed before the gate is poured and poured into the gate body 3 in the form of heat exchange tube 6, leaving the inlet 7 and the outlet 8 to reduce the gate expansion due to high temperature flue gas.
[0030] An electric hoist 13 is fixedly installed on the top of the mounting bracket 1, and a fixed seat 12 is integrally set on the top of the gate body 3. The traction chain of the electric hoist 13 is fixedly connected to the top of the fixed seat 12. The gate body 3 is driven to rise and fall by the electric hoist. Compared with the traditional screw drive, this reduces the failure of the actuator on the one hand, improves the work efficiency on the other hand, and is simple and convenient to operate and more reliable.
[0031] Working principle:
[0032] Before the gate is cast, the pipeline is designed and cast into the gate body 3 in the form of heat exchange pipe 6, leaving inlet 7 and outlet 8 to reduce the gate's thermal expansion due to high temperature flue gas. The frame 5 is first fixedly installed inside the outer shell 4, and then the inner shell is cast to improve the service life of the gate. The gate body 3 is driven to rise and fall by an electric hoist. Compared with the traditional screw drive, this reduces the failure of the actuator, improves work efficiency, and is simple, convenient and reliable to operate.
[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A water-cooled flue damper at the outlet of a calcining furnace flue, characterized in that: include: The mounting bracket (1) has two baffles (2) welded in the middle inside. A gate body (3) is slidably connected between the two baffles (2). The gate body (3) also includes an outer shell (4). A frame (5) is fixedly installed inside the outer shell (4). A heat exchange tube (6) is fixedly installed inside the frame (5). An inlet (7) and an outlet (8) are respectively provided on the left and right sides of the upper surface of the gate body (3). The two ends of the heat exchange tube (6) are connected to the inlet (7) and the outlet (8) respectively.
2. The water-cooled flue damper at the outlet of a calcining furnace as described in claim 1, characterized in that: The heat exchange tube (6) has a "U" shaped structure.
3. A water-cooled flue damper at the outlet of a calcining furnace flue as described in claim 1, characterized in that: The mounting bracket (1) has a high-temperature resistant film wrapped around its outer wall.
4. A water-cooled flue damper at the outlet of a calcining furnace flue as described in claim 1, characterized in that: An electric hoist (13) is fixedly installed on the top of the mounting frame (1), and a fixed seat (12) is integrally provided on the top of the gate body (3). The traction chain of the electric hoist (13) is fixedly connected to the top of the fixed seat (12).
5. A water-cooled flue damper at the outlet of a calcining furnace flue as described in claim 1, characterized in that: The mounting bracket (1) has mounting slots (14) on both the left and right sides.
6. A water-cooled flue damper at the outlet of a calcining furnace flue as described in claim 1, characterized in that: The frame (5) also includes a vertical rod (9), and the vertical rod (9) has two horizontal rods (10) integrally formed in the middle of it.
7. A water-cooled flue damper at the outlet of a calcining furnace flue as described in claim 6, characterized in that: Both the vertical rod (9) and the horizontal rod (10) have connection holes (11) on their outer walls that are compatible with the heat exchange tube (6).