Low-temperature economizer grading flow gas import and export structure

Abstract

The utility model relates to low temperature coal economizer technical field, and disclose low temperature coal economizer grading flow guiding flue gas import and export structure, including device shell still have air intake hopper and cover mechanism, the bottom fixed connection of device shell has the support bottom plate of support use, be provided with the cover mechanism of making device shell seal on device shell, the fixed connection of device shell has the air intake hopper of air intake, the fixed connection of air intake hopper has the shunt pipe body of shunting gas, the fixed connection of support bottom plate has support seat. In use, air is shunted after passing shunt pipe body, enters air intake hopper inside, and is guided by the reciprocating swing of guide plate, gas is dispersed and guided before entering device shell inside, makes it more evenly contact with conveying water pipe and heat exchange fin body after entering device shell and carries out heat exchange, avoids the nonuniform heating between different tube bundles after gas enters device shell inside, to this increases its overall heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature economizers, and in particular to the staged flow flue gas inlet and outlet structure of low-temperature economizers. Background Technology

[0002] In traditional energy utilization scenarios such as thermal power plants, boiler flue gas temperatures are generally high, typically above 120°C or even higher. This high-temperature flue gas is directly discharged into the atmosphere, resulting in a significant waste of thermal energy and reducing the overall thermal efficiency of the boiler. Low-temperature economizers have emerged to address this issue. Installed in the flue gas duct at the boiler's tail end, they effectively utilize the waste heat from the low-temperature flue gas to heat the boiler feedwater, increasing the feedwater temperature and reducing fuel consumption.

[0003] In existing technologies, common low-temperature economizers, with their traditional inlet and outlet structures, often fail to distribute flue gas evenly across the heat exchange tube bundles. In some areas, the flue gas flow is excessive, causing the heat exchange tubes to bear excessive heat loads, accelerating wear and aging. Meanwhile, in other areas, the flue gas flow may be insufficient, preventing these tubes from fully utilizing their heat exchange capacity, resulting in idle and wasted resources. This uneven flue gas distribution not only reduces the overall heat exchange efficiency of the low-temperature economizer but also increases operating costs and maintenance difficulty. Therefore, an improved staged flue gas inlet and outlet structure is needed to address these issues. Utility Model Content

[0004] To overcome the problem that flue gas cannot be evenly distributed to each heat exchange tube bundle after entering the low-temperature economizer, resulting in uneven heating between different tube bundles and reduced overall heat exchange efficiency.

[0005] The technical solution of this utility model is as follows: a staged flue gas inlet and outlet structure for a low-temperature economizer, including a device shell, an inlet hopper, and a sealing mechanism. A support base plate is fixedly connected to the bottom of the device shell. A sealing mechanism for sealing the device shell is provided on the device shell. An inlet hopper for inlet gas is fixedly connected to the device shell. A diverter pipe body for gas diversion is fixedly connected to the inlet hopper. A support base is fixedly connected to the support base. A first motor is fixedly connected to the support base. A first turntable is fixedly connected to the output end of the first motor. A first fixed rod is fixedly connected to the first turntable. A sliding rack is slidably connected to the inlet hopper. A connecting block is fixedly connected to the sliding rack. The first fixed rod is slidably connected to the connecting block. A rotating gear meshes with the sliding rack. A rotating shaft is fixedly connected to the rotating gear. The rotating shaft is rotatably connected to the inlet hopper. A guide plate for guiding the airflow is fixedly connected to the rotating shaft.

[0006] Preferably, the air intake hopper has a guide groove at the relative position of the sliding rack, and the sliding rack is slidably connected to the groove.

[0007] Preferably, the connecting block has a limiting groove at the relative position of the first fixed rod, and the first fixed rod is slidably connected to the groove.

[0008] Preferably, a water supply pipe is fixedly connected to the outer shell of the device. The heat source for heat exchange flows through the water supply pipe to exchange heat with the gas. The water supply pipe is fixedly connected to a heat exchange plate body for auxiliary heat exchange. One end of the water supply pipe is fixedly connected to an outlet for discharging water. The other end of the water supply pipe away from the outlet is fixedly connected to an inlet for supplying water. An exhaust hopper for venting is fixedly connected to the outer shell of the device.

[0009] Preferably, the sealing mechanism includes a sealing body rotatably connected to the device housing, a fixing buckle fixedly connected to the sealing body, a first limiting seat fixedly connected to the device housing, a rotating seat rotatably connected to the first limiting seat, the first limiting seat restricting the rotation of the rotating seat, a guide rod slidably connected to the rotating seat, a first limiting block fixedly connected to the guide rod, the guide rod guiding the sliding of the first limiting block, and a threaded rod threadedly connected to the rotating seat to drive the first limiting block to move, the threaded rod rotatably connected to the first limiting block, and a knob fixedly connected to one end of the threaded rod.

[0010] Preferably, the first limiting seat has a limiting groove at the relative position of the rotating seat, and the rotating seat is rotatably connected to the groove.

[0011] Preferably, the first limiting block has a rotating groove at the relative position of the threaded rod, and the threaded rod is rotatably connected inside the rotating groove.

[0012] The beneficial effects of this utility model are:

[0013] 1. During use, the air is diverted by the main body of the diverter and enters the air inlet hopper. It is then guided by the reciprocating swing of the guide plate. Before entering the outer shell of the device, the air is dispersed and guided, so that it can contact the water pipe and the heat exchange plate body more evenly after entering the outer shell of the device for heat exchange. This avoids uneven heating between different tube bundles after the air enters the outer shell of the device, thereby increasing its overall heat exchange efficiency.

[0014] 2. When it is necessary to open the sealing body, the rotating seat rotates to drive the first limit block and other components to rotate to both sides of the sealing body. Then, the sealing body is pulled to open it. The design of the rotating seat avoids the first limit block and other components from interfering with the rotation of the sealing body after it rotates, providing convenience for staff to open the sealing body for maintenance work. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the staged flue gas inlet and outlet structure of the low-temperature economizer of this utility model.

[0016] Figure 2 This utility model Figure 1 A cross-sectional structural diagram of the device casing;

[0017] Figure 3 This utility model Figure 1 A rear view structural schematic diagram of the device housing and its chain assembly;

[0018] Figure 4 This is a schematic diagram of the structure of the air intake bucket and its connected components of this utility model;

[0019] Figure 5 This is a structural diagram showing the disassembled structure of the first motor and its connected components according to this utility model;

[0020] Figure 6 This is a schematic diagram of the sealing mechanism of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Device housing; 21. Air inlet hopper; 22. Diverter pipe body; 23. Support base; 24. First motor; 25. First turntable; 26. First fixing rod; 27. Sliding rack; 28. Connecting block; 29. ​​Rotating gear; 210. Rotating shaft; 211. Guide plate; 212. Water delivery pipe; 213. Outlet; 214. Inlet; 215. Heat exchanger plate body; 216. Exhaust hopper; 31. Cover body; 32. Fixing buckle; 33. First limiting seat; 34. Rotating seat; 35. Guide rod; 36. First limiting block; 37. Threaded rod; 38. Knob; 4. Support base plate. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please see Figure 1 - Figure 5This utility model provides an embodiment of a staged flue gas inlet and outlet structure for a low-temperature economizer, including a device shell 1, an inlet hopper 21, and a sealing mechanism. A support base plate 4 is fixedly connected to the bottom of the device shell 1. A sealing mechanism for sealing the device shell 1 is provided on the device shell 1. An inlet hopper 21 for inlet gas is fixedly connected to the device shell 1. A diverter pipe body 22 for gas diversion is fixedly connected to the inlet hopper 21. A support base 23 is fixedly connected to the support base 4. A first motor 24 is fixedly connected to the support base 23. A first turntable 25 is fixedly connected to the output end of the first motor 24. A first fixing rod 26 is fixedly connected to the first turntable 25. A sliding rack 27 is slidably connected to the inlet hopper 21. A connecting block 28 is fixedly connected to the sliding rack 27. The first fixing rod 26 is slidably connected to the connecting block. On the 28, a rotating gear 29 meshes with a sliding rack 27, and a rotating shaft 210 is fixedly connected to the rotating gear 29. The rotating shaft 210 is rotatably connected to the air intake hopper 21, and a guide plate 211 for guiding the airflow is fixedly connected to the rotating shaft 210. In use, the gas is diverted through the diverter body 22 and enters the air intake hopper 21. The first motor 24 works to drive the first turntable 25 to rotate. When the first turntable 25 rotates, it drives the first fixed rod 26 to rotate. When the first fixed rod 26 rotates, it cooperates with the connecting block 28 to drive the sliding rack 27 to slide back and forth. When the sliding rack 27 slides, it cooperates with the rotating gear 29 to drive the rotating shaft 210 to rotate back and forth. When the rotating shaft 210 rotates, it drives the guide plate 211 to swing, thereby guiding the gas discharge and making it enter the device housing 1 more evenly.

[0024] Please see Figure 1 - Figure 5In this embodiment, the air intake hopper 21 has a guide groove at the relative position of the sliding rack 27. The sliding rack 27 is slidably connected to the groove, and the sliding of the groove relative to the sliding rack 27 is guided to prevent the sliding rack 27 from tilting during sliding, which would affect its meshing with the rotating gear 29. The connecting block 28 has a limiting groove at the relative position of the first fixed rod 26. The first fixed rod 26 is slidably connected to the groove, and the groove restricts the sliding of the first fixed rod 26 to prevent the first fixed rod 26 from disengaging from the connecting block 28 during sliding. The connecting block 28 cooperates with the first fixed rod 26 to drive the sliding rack 27 to move... The device has a sliding mechanism. A water pipe 212 is fixedly connected to the outer casing 1. The heat source flows through the water pipe 212 to exchange heat with the gas. A heat exchange plate body 215 for auxiliary heat exchange is fixedly connected to the water pipe 212. One end of the water pipe 212 is fixedly connected to an outlet 213 for discharging water. The other end of the water pipe 212 away from the outlet 213 is fixedly connected to an inlet 214 for supplying water. An exhaust hopper 216 for venting is fixedly connected to the outer casing 1. The gas is heat exchanged through the heat exchange plate body 215 in conjunction with the water pipe 212. The gas is then discharged after further heat exchange.

[0025] Please see Figure 2 , Figure 3 , Figure 6 In this embodiment, the sealing mechanism includes a sealing body 31, which is rotatably connected to the device housing 1. A fixing buckle 32 is fixedly connected to the sealing body 31. A first limiting seat 33 is fixedly connected to the device housing 1, and a rotating seat 34 is rotatably connected to the first limiting seat 33, restricting the rotation of the rotating seat 34. A guide rod 35 is slidably connected to the rotating seat 34, and a first limiting block 36 is fixedly connected to the guide rod 35, guiding the sliding of the first limiting block 36 through the guide rod 35. A threaded rod 37 is threadedly connected to the rotating seat 34, driving the first limiting block 36 to move. The threaded rod 37 is rotatably connected to the first limiting block 36, and a knob 38 is fixedly connected to one end of the threaded rod 37. By rotating the knob 38, the first limiting block 36 is engaged with the fixing buckle 32, which restricts the rotation of the cover body 31, so that the cover body 31 closes the device shell 1. The first limiting seat 33 has a limiting groove at the relative position of the rotating seat 34. The rotating seat 34 is rotatably connected to the groove. The groove limits the rotation range of the rotating seat 34, preventing the rotating seat 34 from rotating too much and affecting the engagement of the first limiting block 36 and the fixing buckle 32. The first limiting block 36 has a groove at the relative position of the threaded rod 37. The threaded rod 37 is rotatably connected inside the groove. The groove limits the rotation of the threaded rod 37, preventing the threaded rod 37 from disengaging from the first limiting block 36 when rotating, thus affecting its movement of the first limiting block 36.

[0026] During operation, the gas is diverted through the diverter body 22 and then enters the air inlet hopper 21. The first motor 24 drives the first turntable 25 to rotate. The rotation of the first turntable 25 drives the first fixed rod 26 to rotate. The first fixed rod 26, in conjunction with the connecting block 28, drives the sliding rack 27 to slide back and forth. The sliding rack 27, in conjunction with the rotating gear 29, drives the rotating shaft 210 to rotate back and forth. The rotation of the rotating shaft 210 drives the guide plate 211 to oscillate, thereby guiding the gas discharge and ensuring it enters the device housing 1 more evenly. After entering the device housing 1, the hot water source enters the delivery pipe 212 through the inlet 214 and, in conjunction with the outlet 213, circulates the gas entering the device housing 1. The gas in the part undergoes heat exchange and is discharged through the outlet 213. The gas after heat exchange is collected and discharged by the exhaust hopper 216. When it is necessary to maintain the water supply pipe 212 and the heat exchange plate body 215 inside the device shell 1, the screw 37 is rotated by turning the knob 38. When the screw 37 rotates, it drives the first limiting block 36 to move, so that the first limiting block 36 is disengaged from the fixing buckle 32. Then, the rotating seat 34 is rotated to rotate it outward by 90 degrees. After the rotating cover body 31 is opened, the inside of the device shell 1 is cleaned. Then, the rotating seat 34 and the knob 38 are rotated again to make the first limiting block 36 re-engage with the fixing buckle 32, so that the first limiting block 36 restricts the fixing buckle 32 again, and the cover body 31 closes the device shell 1.

[0027] Through the above steps, during use, the air is diverted through the diversion tube body 22 and enters the air inlet hopper 21. It is then guided by the reciprocating swing of the guide plate 211 to solve the problem that the flue gas cannot be evenly distributed to each heat exchange tube bundle after entering the low-temperature economizer, resulting in uneven heating between different tube bundles and reduced overall heat exchange efficiency.

Claims

1. A staged flue gas inlet and outlet structure for a low-temperature economizer, comprising a device shell (1), characterized in that: It also includes an air intake hopper (21) and a sealing mechanism. A support base plate (4) for support is fixedly connected to the bottom of the device housing (1). A sealing mechanism for sealing the device housing (1) is provided on the device housing (1). An air intake hopper (21) for air intake is fixedly connected to the device housing (1). A diversion pipe body (22) for diverting gas is fixedly connected to the air intake hopper (21). A support base (23) is fixedly connected to the support base plate (4). A first motor (24) is fixedly connected to the support base (23). A first turntable is fixedly connected to the output end of the first motor (24). (25) A first fixed rod (26) is fixedly connected to the first turntable (25). A sliding rack (27) is slidably connected to the air intake hopper (21). A connecting block (28) is fixedly connected to the sliding rack (27). The first fixed rod (26) is slidably connected to the connecting block (28). A rotating gear (29) meshes with the sliding rack (27). A rotating shaft (210) is fixedly connected to the rotating gear (29). The rotating shaft (210) is rotatably connected to the air intake hopper (21). A guide plate (211) for guiding the airflow is fixedly connected to the rotating shaft (210).

2. The staged flue gas inlet and outlet structure of the low-temperature economizer according to claim 1, characterized in that: The air intake hopper (21) has a guide groove at the relative position of the sliding rack (27), and the sliding rack (27) is slidably connected to the groove.

3. The staged flue gas inlet and outlet structure of the low-temperature economizer according to claim 1, characterized in that: The connecting block (28) has a limiting groove at the relative position of the first fixed rod (26), and the first fixed rod (26) is slidably connected to the groove.

4. The staged flue gas inlet and outlet structure of the low-temperature economizer according to claim 1, characterized in that: A water pipe (212) is fixedly connected to the outer casing (1) of the device. The heat source for heat exchange flows through the water pipe (212) to exchange heat with the gas. The water pipe (212) is fixedly connected to the heat exchange plate body (215) for auxiliary heat exchange. One end of the water pipe (212) is fixedly connected to the outlet (213) for discharging water source. The end of the water pipe (212) away from the outlet (213) is fixedly connected to the inlet (214) for supplying water source. An exhaust hopper (216) for exhaust is fixedly connected to the outer casing (1) of the device.

5. The staged flue gas inlet and outlet structure of the low-temperature economizer according to claim 1, characterized in that: The sealing mechanism includes a sealing body (31), which is rotatably connected to the outer shell (1) of the device. A fixing buckle (32) is fixedly connected to the sealing body (31). A first limiting seat (33) is fixedly connected to the outer shell (1). A rotating seat (34) is rotatably connected to the first limiting seat (33). The rotation of the rotating seat (34) is restricted by the first limiting seat (33). A guide rod (35) is slidably connected to the rotating seat (34). A first limiting block (36) is fixedly connected to the guide rod (35). The sliding of the first limiting block (36) is guided by the guide rod (35). A threaded rod (37) that drives the first limiting block (36) to move is threadedly connected to the rotating seat (34). The threaded rod (37) is rotatably connected to the first limiting block (36). A knob (38) is fixedly connected to one end of the threaded rod (37).

6. The staged flue gas inlet and outlet structure of the low-temperature economizer according to claim 5, characterized in that: The first limiting seat (33) has a limiting groove at the relative position of the rotating seat (34), and the rotating seat (34) is rotatably connected to the groove.

7. The staged flue gas inlet and outlet structure of the low-temperature economizer according to claim 5, characterized in that: The first limiting block (36) has a rotating groove at the relative position of the threaded rod (37), and the threaded rod (37) is rotatably connected inside the rotating groove.

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