Frame type flue gas energy saver

Abstract

The utility model discloses a frame type flue gas energy saver which comprises a plurality of heat exchange plates, two side plates and an outer frame, the heat exchange plates are sequentially stacked and arranged to form a core body, the two side plates are arranged on the outer sides of the two heat exchange plates on the outermost side respectively, the outer frame is a rectangular frame and wraps the heat exchange plates and the side plates, and the outer frame is arranged on the outer side of the core body. The end part of the outer frame exceeds the end parts of the heat exchange plates; the core body is further provided with fixing pieces used for reinforcing the heat exchange plates. The shell structure of the frame type flue gas energy saver is free of clamping bolts and pressing plates, the frame structure is formed by welding profiles, a firmer and more stable structure can be formed, the problem of looseness possibly existing in traditional bolt connection is solved, the vibration resistance and fatigue resistance of the structure are effectively improved, the overall strength of the structure is improved, and the service life of the structure is prolonged. The system is suitable for being used in an environment requiring long-term stable operation or facing a vibration load, does not need frequent maintenance and inspection, and reduces the maintenance cost and the risk of system downtime.

Description

Technical Field

[0001] The present application relates to the technical field of flue gas economizers, and in particular to a frame-type flue gas economizer. Background Art

[0002] Plate heat exchangers are a heat exchange technology used in thermal engineering. They are commonly used in flue gas economizers. Their primary function is to transfer heat from flue gas to other fluids (such as water or air), thereby recovering and utilizing energy. With their simple design and high efficiency, these heat exchangers are widely used in industrial heat recovery and energy-saving and environmental protection equipment.

[0003] Plate heat exchangers utilize a multi-layer stacked structure, controlling the heat exchange area by stacking a certain number of heat exchange plates. This stacked design allows for efficient heat transfer, resulting in a high heat exchange coefficient and the ability to achieve a high heat exchange rate within a relatively small space. This design feature gives plate heat exchangers significant advantages in heat recovery and energy conservation, leading to their widespread use in flue gas energy recovery. Compared to traditional shell-and-tube heat exchangers, they offer a smaller footprint and higher heat exchange efficiency.

[0004] The heat exchange core in a flue gas heat exchanger is a core component connected to the fixed baffle by bolts. If the bolts are improperly tightened or after prolonged use, they may loosen or corrode, causing the heat exchanger to leak. This not only affects heat exchange efficiency but also poses a safety hazard. During operation, they are affected by vibration and temperature fluctuations, which increase the fatigue risk of the bolted connections. After long-term operation, the bolted connections may experience fatigue fractures or loosening, requiring regular inspection and maintenance to ensure safety and reliability. Because bolted connections need to consider requirements such as high temperature resistance, corrosion resistance, and mechanical strength, selecting the right bolt material is critical. This can limit the flexibility and applicability of the heat exchanger design, especially under special process requirements or extreme environmental conditions. In summary, although bolted connections are a common structural design in flue gas heat exchangers, they also bring some potential problems and challenges. Utility Model Content

[0005] To this end, the present application provides a frame-type flue gas economizer to solve the problem of fatigue risk of bolt connections in the prior art.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A frame-type flue gas economizer includes a plurality of heat exchange plates, side plates and an outer frame. The heat exchange plates are stacked and arranged in sequence to form a core body. Two side plates are provided, which are respectively arranged on the outside of the two outermost heat exchange plates. The outer frame is a rectangular frame, which is wrapped around the heat exchange plates and the side plates, and the ends of the outer frame extend beyond the ends of the heat exchange plates. The core body is also provided with fixings for reinforcing the heat exchange plates.

[0008] Optionally, the fixing member is a fixing block, and a plurality of the fixing blocks are provided. Two adjacent heat exchange plates are separated by the fixing blocks, and the fixing blocks are in contact with two adjacent heat exchange plates at the same time.

[0009] Optionally, all of the fixing blocks are arranged at the same height position of the core.

[0010] Optionally, cold side horizontal bars are provided on both the upper and lower sides of the core body, and the cold side horizontal bars are arranged along the arrangement direction of the heat exchange plates. The two cold side horizontal bars are on the same side of the core body, and the two cold side horizontal bars and the two side plates are spliced to form a first rectangular channel.

[0011] Optionally, hot side horizontal bars are provided on the upper and lower sides of the core, the hot side horizontal bars are parallel to the cold side horizontal bars, and the two hot side horizontal bars are both located on the side of the core opposite to the cold side horizontal bars. The two hot side horizontal bars and the two side panels are spliced to form a second rectangular channel.

[0012] Optionally, the outer frame is formed by welding a plurality of profiles.

[0013] Optionally, ribs are provided on the side panels.

[0014] Optionally, the ribs are fixed to the side panels by welding.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] 1. The shell structure of the frame type flue gas economizer has no clamping bolts and no pressing plates, which can solve the risk of fatigue damage of the economizer caused by bolt connection.

[0017] 2. By welding the profile frame, a more solid and stable structure can be formed, eliminating the loosening problem that may exist in traditional bolt connections and improving the overall strength of the structure. It can also effectively improve the vibration resistance and fatigue resistance of the structure, making it suitable for use in environments that require long-term stable operation or face vibration loads.

[0018] 3. Welded outer frames generally do not require as frequent maintenance inspections as bolted connections, which reduces maintenance costs and the risk of system downtime.

[0019] 4. Using profiles to build the outer frame instead of heavy compression plates can significantly reduce the overall weight of the structure. This is particularly beneficial for mobile equipment or applications where the overall weight needs to be reduced. It can also simplify the assembly process because profiles are usually designed to standard sizes, making them easier to assemble and adjust.

[0020] 5. The welded profile outer frame usually has a cleaner and more modern appearance, which is suitable for applications that require display. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more intuitively illustrate the prior art and the present application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be considered as limiting conditions for implementing the present application; for example, based on the technical concepts disclosed in this application and the exemplary drawings, those skilled in the art are capable of easily making routine adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components).

[0022] Figure 1 A frame-type flue gas economizer is provided in an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 1. Heat exchange plate; 2. Side plate; 3. Outer frame; 4. Fixing block; 5. Cold side cross bar; 6. Hot side cross bar; 7. Rib plate. DETAILED DESCRIPTION

[0025] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0026] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0027] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the convenience of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0028] A frame type flue gas economizer, refer to Figure 1The heat exchanger core comprises multiple heat exchange plates 1, side plates 2, and an outer frame 3. The heat exchange plates 1 are stacked and arranged in sequence to form a rectangular core. Two side plates 2 are provided, one on the outside of the two outermost heat exchange plates 1, arranged in the same orientation as the heat exchange plates 1. The heat exchange plates 1 are reinforced at both ends. The outer frame 3 is the device housing, a rectangular frame structure that wraps around the heat exchange plates 1 and side plates 2, with the ends of the outer frame 3 extending beyond the ends of the heat exchange plates 1.

[0029] In this embodiment, the outer frame 3 is welded from multiple profiles. Standard profiles can be used for the specific implementation. Using standard profiles to construct the outer frame 3 is more economical than cutting the compression plate, thereby reducing manufacturing costs, which is particularly significant in large structures. Profiles of different materials can be selected to meet specific environmental requirements, such as high temperatures and corrosion.

[0030] The core is also provided with fixings for reinforcing the heat exchange plates 1. In this embodiment, the fixings are fixed blocks 4, and multiple fixing blocks 4 are provided, and the number and position correspond one-to-one with the heat exchange plates 1, so that each fixing block 4 can be set between two adjacent heat exchange plates 1, that is, adjacent heat exchange plates 1 are separated by the fixing blocks 4. In specific implementation, the width of the fixing blocks 4 is set so that its width matches the spacing between the heat exchange plates 1. In this way, after the fixing blocks 4 are embedded in the heat exchange plates 1, the fixing blocks 4 can simultaneously contact the heat exchange plates 1 on both sides to better achieve the reinforcement effect. Among them, the fixing blocks 4 and the heat exchange plates 1 are connected by welding.

[0031] To improve reinforcement stability, the fixing blocks 4 are installed at the same height of the core between the heat exchange plates 1. Furthermore, multiple groups of fixing blocks 4 can be installed at intervals along the height direction of the heat exchange plates 1 to simultaneously reinforce the heat exchange plates 1 at different heights.

[0032] A cold-side horizontal bar 5 is provided on each of the upper and lower sides of the core. The cold-side horizontal bars 5 are arranged along the arrangement of the heat exchange plates 1, with both cold-side horizontal bars 5 located on the same side of the core. The two ends of each cold-side horizontal bar 5 are respectively in contact with and welded to the two side plates 2, forming a first rectangular channel.

[0033] Correspondingly, a hot-side horizontal bar 6 is provided on each of the upper and lower sides of the core. The hot-side horizontal bars 6 are arranged parallel to the cold-side horizontal bars 5 and are located on the side of the core opposite the cold-side horizontal bars 5. The ends of the two hot-side horizontal bars 6 are also respectively in contact with and welded to the two side plates 2, so that the two hot-side horizontal bars 6 and the two side plates 2 form a second rectangular channel.

[0034] From the overall perspective, the two cold-side horizontal bars 5 and the two hot-side horizontal bars 6 are respectively located at the four corners of the core, so that the first rectangular channel and the second rectangular channel are located on two opposite sides of the core. During implementation, the first rectangular channel and the second rectangular channel can form a flue gas inlet and outlet and an air inlet and outlet, respectively.

[0035] In other embodiments, to improve the strength of the side panels 2, ribs 7 may be fixed to the outer sides of the side panels 2 by welding. In this embodiment, the ribs 7 are arranged crisscross on the side panels 2 to separate a plurality of rectangular blocks on the side panels 2, and both ends of the ribs 7 are fixed to the outer frame 3 by welding.

[0036] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A frame-type flue gas economizer, characterized by: The invention comprises a plurality of heat exchange plates (1), side plates (2) and an outer frame (3), wherein the heat exchange plates (1) are stacked and arranged in sequence to form a core body, two side plates (2) are provided, and are respectively provided on the outside of the two outermost heat exchange plates (1), and the outer frame (3) is a rectangular frame, which is wrapped outside the heat exchange plates (1) and the side plates (2), and the end of the outer frame (3) exceeds the end of the heat exchange plate (1); the core body is also provided with a fixing part for reinforcing the heat exchange plate (1).

2. The frame type flue gas economizer according to claim 1, characterized in that: The fixing member is a fixing block (4), and a plurality of the fixing blocks (4) are provided. Two adjacent heat exchange plates (1) are separated by the fixing blocks (4), and the fixing blocks (4) are in contact with the two adjacent heat exchange plates (1) at the same time.

3. The frame type flue gas economizer according to claim 2, characterized in that: All the fixing blocks (4) are arranged at the same height position of the core body.

4. The frame type flue gas economizer according to claim 1, characterized in that: Cold side horizontal bars (5) are provided on both the upper and lower sides of the core body. The cold side horizontal bars (5) are arranged along the arrangement direction of the heat exchange plates (1), and the two cold side horizontal bars (5) are located on the same side of the core body. The two cold side horizontal bars (5) and the two side plates (2) are spliced to form a first rectangular channel.

5. The frame type flue gas economizer according to claim 4, characterized in that: Hot side horizontal bars (6) are provided on both the upper and lower sides of the core body. The hot side horizontal bars (6) are parallel to the cold side horizontal bars (5), and the two hot side horizontal bars (6) are both located on the side of the core body opposite to the cold side horizontal bars (5). The two hot side horizontal bars (6) and the two side plates (2) are spliced to form a second rectangular channel.

6. The frame type flue gas economizer according to claim 1, characterized in that: The outer frame (3) is formed by welding a plurality of profiles.

7. The frame type flue gas economizer according to claim 1, characterized in that: A rib plate (7) is provided on the side plate (2).

8. The frame type flue gas economizer according to claim 7, characterized in that: The rib plate (7) is fixed to the side plate (2) by welding.

Images