Drainage flue structure for plate-type air preheater

Abstract

The utility model relates to the technical field of drainage flue structures, and discloses a drainage flue structure for a plate-type air preheater, which comprises a drainage flue, a plate-type air preheater shell is arranged on the side surface of the drainage flue, a detection device is arranged on the surface of the drainage flue, and a discharge device is arranged on the side surface of the drainage flue. The detection device comprises a bottom end connecting plate, a mounting bolt piece, a bearing plate, control equipment, a connecting cable, a temperature and humidity detection sensor and an extension cable end. According to the drainage flue structure for the plate type air preheater, the detection device is arranged, an arranged temperature and humidity detection sensor extends into the position, close to the bottom end, of the interior of the drainage flue, and a humidity sensor and a temperature sensor are installed in a funnel-shaped area at the bottom of the drainage flue, so that the generation condition of condensate water is monitored in real time; once the sensor sends out a signal, the drainage valve is automatically opened, instant drainage of condensate water is achieved, and accumulated water is prevented from corroding equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage flue structures, and particularly relates to a drainage flue structure for a plate - type air preheater. Background Technique

[0002] Due to the requirements of energy conservation and emission reduction, the flue gas discharge temperature is required to be lower and lower. The basic structural form of the plate - type air preheater is that the flue gas passes through the air preheater from top to bottom, discharges from the bottom of the air preheater, and then turns and is connected to the side flue. Since the air preheater generates condensate during operation, and since the flue gas often contains sulfur components, the generated condensate is corrosive and must be discharged in time to effectively protect the equipment and extend the service life of the equipment.

[0003] The prior art discloses a drainage flue structure for a plate - type air preheater with the publication number: CN202361878U, which includes a plate - type air preheater body and a drainage device; the drainage device includes a sealed housing, an inlet for flue gas is opened above the housing, and an outlet for flue gas is opened on the side wall of the housing; the inlet for flue gas is hermetically connected to the flue gas outlet of the plate - type air preheater body; the bottom of the housing is funnel - shaped, and a drainage / sewage outlet is opened at the bottom end of the funnel - shaped part. This technical solution is used to discharge the condensate generated during the operation of the equipment in real time, prevent the equipment from being corroded and damaged due to water accumulation, and at the same time prevent the condensate from entering the flue with the flue gas and corroding the flue and other equipment. When the equipment is being cleaned, it is used to discharge the sewage for flushing in real time.

[0004] The above - mentioned drainage flue structure of the plate - type air preheater is used to discharge the condensate generated during the operation of the equipment in real time, prevent the equipment from being corroded and damaged due to water accumulation, and at the same time prevent the condensate from entering the flue with the flue gas and corroding the flue and other equipment. However, in the above - mentioned drainage flue structure, humidity and temperature sensors are not installed in the funnel - shaped area at the bottom of the drainage flue, so the generation situation of condensate cannot be monitored in real time, and the drainage mechanism cannot be automatically triggered. The inner wall is not provided with corrosion - resistant materials, so the corrosion resistance of the equipment cannot be enhanced, the service life is low, and the effect during use is not good, and improvements need to be made to this. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a drainage flue structure for a plate - type air preheater to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A drainage flue structure for a plate - type air preheater, including a drainage flue, a plate - type air preheater housing is arranged on the side of the drainage flue, a detection device is arranged on the surface of the drainage flue, and a discharge device is arranged on the side of the drainage flue.

[0007] The detection device includes a bottom connecting plate, mounting bolt members, a bearing plate, a control device, connecting cables, a temperature and humidity detection sensor, and an extended cable end. The bottom connecting plate is fixedly connected to the bottom of the plate-type air preheater housing. The bearing plate is connected to the surface of the drainage flue near the bottom end. The control device is connected to the top of the bearing plate. The extended cable end is fixedly connected to the bottom of the connecting cable.

[0008] Preferably, the discharge device includes a valve member, a valve stem, a corrosion-resistant pipe fitting, an inner protective layer, and a drain pipe. The drain pipe is fixedly connected to the right bottom of the drainage flue. The valve member is connected to the surface of the drain pipe. The valve stem is connected to the inside of the valve member.

[0009] Preferably, threaded grooves are formed inside the bottom connecting plate, and connecting screw holes with the same aperture as the threaded grooves are formed on the side of the drainage flue. The mounting bolt members are threadedly connected to the inside of the threaded grooves and the connecting screw holes.

[0010] Preferably, the corrosion-resistant pipe fitting is fixedly connected to the inner wall of the drain pipe, and the inner protective layer is fixedly connected to the inner wall of the corrosion-resistant pipe fitting.

[0011] Preferably, the bottom of the extended cable end is connected to the top of the valve stem. The control device is connected to the valve stem through the connecting cable. When it is detected that the internal condensate exceeds the limit, the valve stem can be activated to discharge the condensate. The valve stem below is designed as an electric drain valve, which is linked with the control device. Once the sensor sends a signal, the drain valve automatically opens. The extended cable end plays a role in connecting the valve stem and the control device.

[0012] Preferably, the temperature and humidity detection sensor is fixedly connected to the side of the control device. The temperature and humidity detection sensor is arranged to extend into the drainage flue near the bottom end. Humidity and temperature sensors are installed in the funnel-shaped area at the bottom of the drainage flue to monitor the generation of condensate in real time. It is used in cooperation with the control device. When it is detected that the condensate reaches a certain amount or the temperature is lower than the set threshold, the drainage mechanism is automatically triggered.

[0013] Preferably, the connecting cable is fixedly connected to the front of the control device. The connecting cable passes through the inside of the bearing plate and extends to be connected to the bottom of the bearing plate.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. The drainage flue structure for the plate - type air pre - heater is provided with a detection device. By using the temperature and humidity detection sensor set to extend into the position near the bottom inside the drainage flue, humidity and temperature sensors are installed in the funnel - shaped area at the bottom of the drainage flue to monitor the generation of condensate in real - time. Once the sensor sends a signal, the drain valve automatically opens to achieve the immediate discharge of condensate and prevent water accumulation from corroding the equipment.

[0016] 2. The drainage flue structure for the plate - type air pre - heater is provided with a discharge device. A drain pipe is arranged on the right side at the bottom of the drainage flue for draining water. And an inner protective layer and a drain pipe are arranged inside the drain pipe. Materials with high temperature resistance and corrosion resistance are used to enhance the anti - corrosion ability of the equipment and extend its service life. A wear - resistant and corrosion - resistant coating is applied to the drain outlet and the flue gas flow area to reduce damage caused by long - term erosion and corrosion, which can increase the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front - view structural schematic diagram of the whole utility model;

[0018] Figure 2 is the Figure 1 magnified structural schematic diagram at position A in the utility model;

[0019] Figure 3 is the side - view structural schematic diagram of the whole utility model;

[0020] Figure 4 is the Figure 3 magnified structural schematic diagram at position B in the utility model.

[0021] In the figure: 1. Drainage flue; 2. Plate - type air pre - heater housing; 3. Detection device; 301. Bottom connection plate; 302. Installation bolt parts; 303. Bearing plate; 304. Control equipment; 305. Connection cable; 306. Temperature and humidity detection sensor; 307. Extended cable end; 4. Discharge device; 401. Valve parts; 402. Valve rod; 403. Corrosion - resistant pipe fittings; 404. Inner protective layer; 405. Drain pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-4 , the present utility model provides the following technical solutions:

[0024] A drainage flue structure for a plate - type air preheater, comprising a drainage flue 1. A plate - type air preheater housing 2 is arranged on the side of the drainage flue 1. A detection device 3 is arranged on the surface of the drainage flue 1. A discharge device 4 is arranged on the side of the drainage flue 1.

[0025] The detection device 3 includes a bottom connecting plate 301, mounting bolt parts 302, a bearing plate 303, a control device 304, a connecting cable 305, a temperature and humidity detection sensor 306, and an extended cable end 307. The bottom connecting plate 301 is fixedly connected to the bottom of the plate - type air preheater housing 2. The bearing plate 303 is connected to the surface of the drainage flue 1 near the bottom. The control device 304 is connected to the top of the bearing plate 303. The extended cable end 307 is fixedly connected to the bottom of the connecting cable 305. The connecting cable 305 is fixedly connected to the front of the control device 304. The connecting cable 305 penetrates through the inside of the bearing plate 303 and extends to be connected to the bottom of the bearing plate 303. The temperature and humidity detection sensor 306 is fixedly connected to the side of the control device 304. By using the arranged temperature and humidity detection sensor 306 to extend into the position near the bottom inside the drainage flue 1, humidity and temperature sensors are installed in the funnel - shaped area at the bottom of the drainage flue to monitor the generation of condensed water in real - time, and it is used in cooperation with the control device 304. When it is detected that the condensed water reaches a certain amount or the temperature is lower than the set threshold, the drainage mechanism is automatically triggered. The temperature and humidity detection sensor 306 is fixedly connected to the side of the control device 304. By using the arranged temperature and humidity detection sensor 306 to extend into the position near the bottom inside the drainage flue 1, humidity and temperature sensors are installed in the funnel - shaped area at the bottom of the drainage flue to monitor the generation of condensed water in real - time, and it is used in cooperation with the control device 304. When it is detected that the condensed water reaches a certain amount or the temperature is lower than the set threshold, the drainage mechanism is automatically triggered. The bottom of the extended cable end 307 is connected to the top of the valve stem 402. The control device 304 is connected to the valve stem 402 by the connecting cable 305. When it is detected that the internal condensed water is excessive, the valve stem 402 can be started to discharge the condensed water. The lower valve stem 402 is designed as an electric drain valve, which is linked with the control device 304. Once the sensor sends a signal, the drain valve automatically opens. The extended cable end 307 plays a role in connecting the valve stem 402 and the control device 304.

[0026] The discharge device 4 includes a valve member 401, a valve stem 402, a corrosion - resistant pipe fitting 403, an inner protective layer 404, and a drain pipe 405. The drain pipe 405 is fixedly connected to the right - hand bottom of the drainage flue 1. The valve member 401 is connected to the surface of the drain pipe 405. The valve stem 402 is connected to the inside of the valve member 401. The corrosion - resistant pipe fitting 403 is fixedly connected to the inner wall of the drain pipe 405. The inner protective layer 404 is fixedly connected to the inner wall of the corrosion - resistant pipe fitting 403.

[0027] In use, the drainage device is designed as a modular structure. Each module includes an independent sensor, a drainage valve, and a drainage channel. During use, first, the plate-type air preheater housing 2 is installed on the side of the drainage flue 1 by using the bottom connecting plate 301 and the mounting bolt member 302, and the passing flue gas is preheated. During the preheating process, condensate is generated and concentrated at the lower position. Without opening the valve stem 402, the condensate will adhere to the inner wall. Then, the set temperature and humidity detection sensor 306 is extended into the drainage flue 1 near the bottom end, and humidity and temperature sensors are installed in the funnel-shaped area at the bottom of the drainage flue to monitor the generation of condensate in real time. When it is detected that the condensate reaches a certain amount or the temperature is lower than the set threshold, the drainage mechanism is automatically triggered. Since the temperature and humidity detection sensor 306 is controlled by the control device 304, and the control device 304 is connected to the valve stem 402 by the connecting cable 305, when the internal condensate is detected to be excessive, the valve stem 402 can be activated to drain the condensate. The lower valve stem 402 is designed as an electric drainage valve and is linked with the control device 304. Once the sensor sends a signal, the drainage valve automatically opens to achieve the instant discharge of condensate, preventing water accumulation from corroding the equipment. Moreover, a drain pipe 405 is provided on the right side at the bottom of the drainage flue 1 for drainage, and an inner protective layer 404 and the drain pipe 405 are provided inside the drain pipe 405. Materials with high temperature resistance and corrosion resistance are used to enhance the anti-corrosion ability of the equipment and extend its service life. A wear-resistant and corrosion-resistant coating is applied to the drainage outlet and the flue gas flow area to reduce damage caused by long-term scouring and corrosion, and the service life of the device can be increased.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to the embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drainage flue structure for a plate-type air preheater, comprising a drainage flue (1), characterized in that: A plate-type air preheater housing (2) is provided on the side of the drainage flue (1), a detection device (3) is provided on the surface of the drainage flue (1), and a discharge device (4) is provided on the side of the drainage flue (1); The detection device (3) comprises a bottom connection plate (301), a mounting bolt (302), a bearing plate (303), a control device (304), a connecting cable (305), a temperature and humidity detection sensor (306) and an extension cable end (307), wherein the bottom connection plate (301) is fixedly connected to the bottom of the plate-type air preheater shell (2), the bearing plate (303) is connected to the surface of the drainage flue (1) near the bottom, the control device (304) is connected to the top of the bearing plate (303), and the extension cable end (307) is fixedly connected to the bottom of the connecting cable (305).

2. The drainage flue structure for a plate-type air preheater according to claim 1, characterized in that: The discharge device (4) comprises a valve member (401), a valve stem (402), a corrosion-resistant pipe member (403), an inner protective layer (404) and a drain pipe (405); the drain pipe (405) is fixedly connected to the right bottom of the drainage flue (1); the valve member (401) is connected to the surface of the drain pipe (405); and the valve stem (402) is connected to the inside of the valve member (401).

3. The drainage flue structure for a plate-type air preheater according to claim 1, characterized in that: The bottom connecting plate (301) has a threaded groove inside, the side of the drainage flue (1) has a connecting screw hole with the same hole diameter as the threaded groove, and the mounting bolt (302) is threadedly connected to the threaded groove and the connecting screw hole.

4. The drainage flue structure for a plate-type air preheater according to claim 2, characterized in that: The corrosion-resistant pipe fitting (403) is fixedly connected to the inner wall of the drainage pipe (405), and the inner protective layer (404) is fixedly connected to the inner wall of the corrosion-resistant pipe fitting (403).

5. The drainage flue structure for a plate-type air preheater according to claim 1, characterized in that: The bottom of the extension cable end (307) is connected to the top of the valve stem (402).

6. The drainage flue structure for a plate-type air preheater according to claim 1, characterized in that: The temperature and humidity detection sensor (306) is fixedly connected to the side of the control device (304).

7. The drainage flue structure for a plate-type air preheater according to claim 1, characterized in that: The connection cable (305) is fixedly connected to the front of the control device (304), and the connection cable (305) passes through the interior of the carrier plate (303) and extends to be connected to the bottom of the carrier plate (303).

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