Flue gas gate valve with heat recovery function

Abstract

The utility model discloses a flue gas gate valve with a heat recovery function. The flue gas gate valve comprises a heat exchange tube bundle, a baffle, a top sealing plate, a lifting actuator, a medium inlet tube and a medium outlet tube, according to the utility model, through the combined application of the liftable flashboard and the U-shaped heat exchange tube bundle, not only is the adjusting function of a conventional gate valve realized, but also the functions of flue gas waste heat recovery and flue gas dust removal are realized; the flue gas temperature can be flexibly adjusted, the operation power consumption of the fan is effectively reduced, and a good operation environment is created for subsequent equipment; and due to the modular structural design, the application schemes are richer, the regulation and control modes are more, and different application scenes and operation working conditions can be better adapted.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas damper valves, and particularly relates to a flue gas damper valve with a heat recovery function. Background Art

[0002] In the industrial production process, most flue gas and air discharge systems are equipped with flue gas damper valves, whose main function is to adjust the resistance characteristics of the flue gas and air system to adapt to the operation load fluctuations of boilers or kiln furnaces. Generally speaking, the flue gas temperature at the location where the flue gas damper valve is arranged is relatively high, and the quality of the flue gas waste heat is relatively good, but this part of the waste heat is not utilized, which has to be said to be a waste of resources; and in this environment, the flue gas damper valve only plays the role of system pressure regulation, and its value and the advantages of its geographical conditions are not fully exerted. At the same time, since the flue gas damper valve is usually arranged in the inlet flue of the fan, the fan itself also suffers from high-temperature thermal stress damage of the flue gas and frictional damage of high-speed soot, which brings about operation failures of the fan and a reduction in its service life. In addition, the volume of the flue gas is positively correlated with the temperature. At high temperatures, the volume flow rate of the flue gas is larger and the flow velocity is also higher, which to a certain extent causes an increase in the operation resistance of the flue gas and air system, thereby increasing the electric power of the fan and the operation power consumption cost of the enterprise. Therefore, it is necessary to propose a flue gas damper valve with a heat recovery function to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a flue gas damper valve with a heat recovery function for the deficiencies of the prior art, so as to solve the problems that the waste heat in the use of the existing flue gas damper valve is not utilized, and it will bring about operation failures of the fan and a reduction in its service life, and increase the electric power of the fan.

[0004] The utility model provides a flue gas damper valve with a heat recovery function, which includes: a heat exchange tube bundle, a baffle plate, a top sealing plate, a lifting actuator, a medium inlet pipe, and a medium outlet pipe;

[0005] The heat exchange tube bundle adopts U-shaped metal heat exchange smooth tubes, and both ends of the heat exchange tube bundle are respectively connected to the medium inlet pipe and the medium outlet pipe; a baffle is arranged above the middle of the heat exchange tube bundle, and a suspension hole is arranged at the top of the baffle; a top sealing plate is arranged above the heat exchange tube bundle, and a lifting actuator is arranged above the top sealing plate; the lifting actuator includes a frame, a crank, a rotating bearing, a circular chuck, a semi-circular chuck, a steel wire rope, a steel wire rope chuck, a pin and a limit pin; the frame is arranged above the top sealing plate, the rotating bearing and the semi-circular chuck are fixed on the top surface of the frame, the crank horizontally passes through the circular chuck, the semi-circular chuck, two rotating bearings and two steel wire rope chucks, the circular chuck and the steel wire rope chuck are fixed to the crank by threads, and the circular chuck and the semi-circular chuck are fixed by a pin; a limit pin hole is opened on the crank near the inner wall of the rotating bearing and fixed by a limit pin; one end of the steel wire rope is fixed between the two steel wire rope chucks on the crank, and the other end is connected to the suspension hole at the top of the baffle.

[0006] Further, both ends of the heat exchange tube bundle are respectively welded and connected to the medium inlet pipe and the medium outlet pipe.

[0007] Further, a medium flow regulating valve is arranged on the medium inlet pipe.

[0008] Further, the frame is fixed to the top sealing plate by means of bolts through a backing plate.

[0009] Further, flanges are arranged at both ends of the top sealing plate, and a plurality of flue gas damper valves are combined and applied. The medium inlet pipes and the medium outlet pipes of adjacent flue gas damper valves are respectively connected, and adjacent flue gas damper valves are connected through flanges.

[0010] The utility model has the following beneficial effects: A flue gas damper valve with a heat recovery function provided by the utility model, through the combined application of a liftable damper and a U-shaped heat exchange tube bundle, not only realizes the adjustment function of a conventional damper valve, but also has the functions of flue gas waste heat recovery and flue gas dust removal; the flue gas temperature can be flexibly adjusted, the operation power consumption of the fan can be effectively reduced, and a good operation environment is created for subsequent equipment; the modular structure design, the application scheme is more abundant, the control mode is more, and it can better adapt to different application scenarios and operation conditions. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is the front view of the flue gas damper valve with a heat recovery function of the present invention;

[0013] Figure 2 It is the side view of the flue gas damper valve with heat recovery function of the present utility model;

[0014] Figure 3 It is the top view of the flue gas damper valve with heat recovery function of the present utility model;

[0015] Figure 4 It is the front view schematic diagram of the three-module combined application of the flue gas damper valve with heat recovery function of the present utility model;

[0016] Figure 5 It is the top view schematic diagram of the three-module combined application of the flue gas damper valve with heat recovery function of the present utility model;

[0017] Figure 6 It is the three-dimensional schematic diagram of the three-module combined application of the flue gas damper valve with heat recovery function of the present utility model;

[0018] Figure 7 It is the schematic diagram of the layout scheme of the flue gas damper valve with heat recovery function of the present utility model.

[0019] Illustration: 1 - Frame; 2 - Medium flow regulating valve; 3 - Medium inlet pipe; 4 - Connecting flange; 5 - Steel wire rope; 6 - Baffle; 7 - Medium outlet pipe; 8 - Heat exchange tube bundle; 9 - Crank; 10 - Circular chuck; 11 - Semi-circular chuck; 12 - Rotating bearing; 13 - Pad; 14 - Steel wire rope chuck; 15 - Top seal plate; 16 - Pin; 17 - Limit pin hole; 18 - Limit pin. Detailed implementation mode

[0020] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments. It should be pointed out that the following detailed description is illustrative and is intended to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0021] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations will be made for the spatial relative descriptions used herein.

[0022] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, the thickness of layers and regions is enlarged for clarity, and the same reference numerals are used to denote the same devices, and thus their descriptions will be omitted.

[0023] An embodiment of the present utility model provides a flue gas damper valve with a heat recovery function, which adopts a modular design concept and mainly consists of two parts: a fixed heat exchange unit and a movable lifting unit. It can not only recover the heat of high-temperature flue gas to heat the medium that needs to be heated on-site, reduce the flue gas temperature during the operation of the fan, achieve the purpose of protecting the safe operation of the fan and reducing its operating power consumption, but also play a certain dust removal role, thereby further improving the operating safety of the fan, and ultimately achieving multiple benefits and providing a new solution for industrial flue gas treatment.

[0024] Please refer to Figures 1 to 7 , an embodiment of the present utility model provides a flue gas damper valve with a heat recovery function, including: a heat exchange tube bundle 8, a baffle 6, a top seal plate 15, a lifting actuator, a medium inlet pipe 3, and a medium outlet pipe 7.

[0025] Among them, the heat exchange tube bundle 8 adopts U-shaped metal heat exchange smooth tubes, and both ends of the heat exchange tube bundle 8 are welded to the medium inlet pipe 3 and the medium outlet pipe 7 respectively; a medium flow regulating valve 2 is provided on the medium inlet pipe 3 to regulate the flow of the medium, thereby controlling the overall heat exchange amount of the heat exchange tubes to match the operating conditions of the main process.

[0026] The baffle plate 6 is arranged above the middle of the heat exchange tube bundle 8. A lifting hole is provided at the top of the baffle plate 6, and the baffle plate 6 is made of thin metal steel plate; the top sealing plate 15 is arranged above the heat exchange tube bundle 8, and the lifting actuator is arranged above the top sealing plate 15; the top sealing plate 15 is made of metal steel plate, which is mainly used to fix the heat exchange tube bundle 8 and seal the flue gas and air system.

[0027] The lifting actuator includes a frame 1, a hand crank 9, a rotating bearing 12, a circular chuck 10, a semi-circular chuck 11, a steel wire rope 5, a steel wire rope chuck 14, a pin 16 and a limit pin 18; the frame 1 is arranged above the top sealing plate 15, and the rotating bearing 12 and the semi-circular chuck 11 are fixed on the top surface of the frame 1. The hand crank 9 horizontally passes through the circular chuck 10, the semi-circular chuck 11, two rotating bearings 12 and two steel wire rope chucks 14. The circular chuck 10 and the steel wire rope chuck 14 are fixed to the hand crank 9 by threads, and the circular chuck 10 and the semi-circular chuck 11 are fixed by the pin 16 to prevent the hand crank 9 from rotating under the action of the self-weight of the baffle plate 6, thus affecting the opening degree of the baffle plate 6; a limit pin hole 17 is opened on the hand crank 9 near the inner wall of the rotating bearing 12 and fixed with the limit pin 18 to prevent the hand crank 9 from slipping out of the rotating bearing 12; one end of the steel wire rope 5 is fixed between the two steel wire rope chucks 14 on the hand crank 9, and the other end is connected to the lifting hole at the top of the baffle plate 6. The frame 1 is fixed to the top sealing plate 15 by means of bolts through a backing plate 13.

[0028] Preferably, flanges 4 are provided at both ends of the top sealing plate 15, and a plurality of flue gas flap valves are combined for application. The medium inlet pipes 3 and the medium outlet pipes 7 of adjacent flue gas flap valves are respectively connected, and adjacent flue gas flap valves are connected through the flanges 4. A certain distance is set between the heat exchange tube bundles to ensure that the resistance of the heat exchange tube bundles matches the main process operation parameters; the number of rows of the heat exchange tube bundles can be optimized according to the actual application scenario parameters to improve the comprehensive performance of the device; the device adopts a modular structure design, and the modules are connected through the connecting flanges 4. According to the actual scenario, a single or multiple modules can be combined for application; when multiple modules are combined for application, the overall resistance characteristics of the flap valve can be flexibly matched with the actual operation state of the main process by adjusting the opening degree of the baffle plate of a single module or adjusting the opening degrees of multiple modules simultaneously.

[0029] Such as Figure 7As shown in the figure, the flue gas damper valve with heat recovery function in the embodiment of the present utility model is arranged at the top of the flue, fixed by the top sealing plate 15 and the flue wall plate. The heat exchange tube bundle 8 and the baffle 6 are inserted into the flue. By rotating the crank 9, the length of the steel wire rope 5 hanging down is adjusted, and then the depth of the baffle 6 inserted into the flue is controlled, so as to achieve the effect of changing the cross-sectional area of the flue flow, thereby realizing the control of the resistance characteristics of the flue gas and air system. The high-temperature flue gas horizontally scours the outer wall of the heat exchange tube bundle 8. The low-temperature medium enters the tube of the heat exchange tube bundle 8 from the medium inlet pipe 3 through the medium flow regulating valve 2. The high-temperature flue gas and the low-temperature medium complete the heat exchange process through the heat exchange tube wall. The high-temperature flue gas releases heat and cools down to become low-temperature flue gas. And part of the dust in the flue gas is intercepted by the heat exchange tube bundle and collected, falling into the ash hopper directly below the heat exchange tube bundle 8, and is discharged from the flue regularly by manual or automatic ash discharge. The low-temperature and less-dusty flue gas enters the downstream process. After the low-temperature medium absorbs heat and heats up, it is discharged from the medium outlet pipe 7, thereby realizing the dual effects of flue gas cooling and dust removal and flue gas waste heat utilization, and finally achieving the goal of improving the operating environment of downstream process equipment and saving energy and reducing consumption in the main process production.

[0030] In summary, the flue gas damper valve with heat recovery function in the embodiment of the present utility model adopts the form of a combination of a liftable damper and a U-shaped heat exchange tube bundle. It can not only realize the adjustment function of the resistance characteristics of the flue gas and air system, but also effectively recover the waste heat in the flue gas to heat the process medium, achieving the effect of energy saving. It can effectively control the temperature of the flue gas, which is beneficial to reducing the operating power of the fan and improving the operating safety of subsequent process equipment at the same time. Adopting a modular structure design, it can be applied in the form of a single unit or a combination, and at the same time has a flexible method for adjusting the flue gas resistance and temperature characteristics, which can optimize the operating conditions of the flue gas and air system. Its heat exchange tube bundle has a certain dust removal effect, which can reduce the friction damage of the dust-containing flue gas to the equipment behind the valve.

[0031] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A flue gas gate valve with heat recovery function, characterized in that: include: A heat exchange tube bundle (8), a baffle (6), a top sealing plate (15), a lifting actuator, a medium inlet pipe (3) and a medium outlet pipe (7); The heat exchange tube bundle (8) adopts a U-shaped metal heat exchange light tube, and the two ends of the heat exchange tube bundle (8) are respectively connected to the medium inlet pipe (3) and the medium outlet pipe (7); the baffle (6) is arranged above the middle of the heat exchange tube bundle (8), and a hanging hole is arranged on the top of the baffle (6); the top sealing plate (15) is arranged above the heat exchange tube bundle (8), and the lifting actuator is arranged on the upper part of the top sealing plate (15); the lifting actuator comprises a frame (1), a crank (9), a rotating bearing (12), a circular chuck (10), a semicircular chuck (11), a wire rope (5), a wire rope chuck (14), a clamping pin (16) and a limit pin (18); the frame (1) is arranged above the top sealing plate (15), and ... The rotating bearing (12) and the semicircular chuck (11) are fixed on the top surface of the frame (1); the crank (9) horizontally passes through the circular chuck (10), the semicircular chuck (11), the two rotating bearings (12) and the two wire rope chucks (14); the circular chuck (10), the wire rope chuck (14) and the crank (9) are fixed by threads; the circular chuck (10) and the semicircular chuck (11) are fixed by a pin (16); a limit pin hole (17) is provided on the crank (9) near the inner wall of the rotating bearing (12), and is fixed by a limit pin (18); one end of the wire rope (5) is fixed between the two wire rope chucks (14) on the crank (9), and the other end is connected to the hanging hole on the top of the baffle (6).

2. A flue gas gate valve with heat recovery function as claimed in claim 1, characterized in that: The two ends of the heat exchange tube bundle (8) are respectively connected to the medium inlet pipe (3) and the medium outlet pipe (7) by welding.

3. The flue gas gate valve with heat recovery function according to claim 1, characterized in that: The medium inlet pipe (3) is provided with a medium flow regulating valve (2).

4. The flue gas gate valve with heat recovery function according to claim 1, characterized in that: The frame (1) is fixed to the top cover plate (15) by means of bolt connection via a backing plate (13).

5. The flue gas gate valve with heat recovery function according to claim 1, characterized in that: Flanges (4) are provided at both ends of the top sealing plate (15), a plurality of smoke gate valves are used in combination, the medium inlet pipes (3) and the medium outlet pipes (7) of adjacent smoke gate valves are connected respectively, and adjacent smoke gate valves are connected via flanges (4).

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