Staged economizer assembly of boiler

Abstract

The utility model discloses a boiler staged economizer assembly, which belongs to the technical field of boiler equipment and comprises an economizer shell, a smoke inlet is arranged at the top end of the economizer shell, a smoke outlet is arranged at the bottom end of the economizer shell, and a connecting port is arranged on the outer side wall of the economizer shell. A filter plate is slidably inserted into an inner cavity of the connecting opening, a dismounting and mounting mechanism facilitating quick dismounting and mounting with the shell is arranged at one end of the filter plate, a heat exchange pipe is arranged in an inner cavity of the economizer shell, and the top end of the heat exchange pipe penetrates through the economizer shell and is provided with a water inlet. The bottom ends of the heat exchange pipes penetrate through the economizer shells and are provided with water outlets, the three sets of economizer shells are arranged, and combined structures convenient to assemble are arranged among the three sets of economizer shells, so that the working efficiency of the staged economizer is improved, and the surrounding environment is prevented from being polluted when smoke is exhausted.

Description

Technical Field

[0001] This utility model relates to the field of boiler equipment technology, specifically to a boiler staged economizer assembly. Background Technology

[0002] An economizer is a device installed at the bottom of the boiler flue to recover waste heat from the exhaust gas. It heats the boiler feedwater to saturated water at drum pressure. Because it absorbs heat from the high-temperature flue gas, it lowers the exhaust gas temperature, saves energy, and improves efficiency; hence the name economizer. A staged economizer is an improvement on the traditional economizer, using a staged arrangement to gradually reduce the flue gas temperature. It utilizes the waste heat from the boiler exhaust to heat the boiler feedwater, thereby increasing the feedwater temperature, lowering the exhaust gas temperature, reducing exhaust gas losses, and saving fuel.

[0003] Existing staged economizers typically exchange heat with the high-temperature flue gas in the boiler through internal heat exchange tubes. Since the flue gas from boiler combustion contains a large number of impurities, the staged economizer cannot filter out the impurities in the high-temperature flue gas, causing the impurities to adhere to the surface of the heat exchange tubes, affecting the working efficiency of the staged economizer. At the same time, the flue gas is prone to polluting the surrounding environment when it is discharged.

[0004] According to announcement number CN118794005A, a boiler staged economizer unit includes an economizer shell, within which a curved copper tube is installed. This invention uses a servo motor to drive a rotating rod, causing push rod one and push rod two to move in opposite directions. Through synchronous frames one and two, a scraper ring reciprocates on the curved copper tube, cleaning its surface and preventing a decrease in heat exchange efficiency. This method also allows the partition to rotate and tilt, altering the internal flow space of the economizer shell and extending the passage time of high-temperature flue gas. This allows the water source inside the curved copper tube to better cool the flue gas. This method effectively controls the heat conversion process of the high-temperature flue gas while ensuring the working performance of the curved copper tube, facilitating timely adjustments.

[0005] As described above, the boiler staged economizer unit contains a large number of impurities in the flue gas. The staged economizer cannot filter out the impurities in the high-temperature flue gas, causing the impurities to adhere to the surface of the heat exchange tubes, which affects the working efficiency of the staged economizer. At the same time, the flue gas is easy to pollute the surrounding environment when it is discharged. Therefore, we need to propose a boiler staged economizer component. Utility Model Content

[0006] The purpose of this utility model is to provide a boiler staged economizer assembly. By setting up filter plates, impurities in the high-temperature flue gas entering through the flue gas inlet can be filtered. The disassembly and assembly mechanism facilitates the cleaning and replacement of the filter plates in the later stages. The cooperation of three sets of economizer shells can perform staged filtration of high-temperature flue gas, thereby improving the working efficiency of the staged economizer and preventing pollution of the surrounding environment when the flue gas is discharged, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a boiler staged economizer assembly, including an economizer shell, a flue gas inlet at the top of the economizer shell, a flue gas outlet at the bottom of the economizer shell, a connection port on the outer side wall of the economizer shell, a filter plate slidably inserted into the inner cavity of the connection port, a disassembly and assembly mechanism for quick disassembly and assembly of the filter plate at one end, a heat exchange tube in the inner cavity of the economizer shell, a water inlet at the top of the heat exchange tube penetrating the economizer shell, a water outlet at the bottom of the heat exchange tube penetrating the economizer shell, and three sets of economizer shells, with a combination structure for easy assembly between the three sets of economizer shells.

[0008] Preferably, the disassembly and assembly mechanism includes a sealing seat, the surface of which is welded and fixed to one end of the filter plate. Disassembly and assembly seats are provided on both sides of the sealing seat. A through hole is opened on the surface of the disassembly and assembly seat. A support column is slidably inserted into the inner cavity of the through hole of the disassembly and assembly seat. One end of the support column is welded and fixed to the surface of the disassembly and assembly seat. A slot is fixedly connected to the surface of the disassembly and assembly seat. A locking block is fixedly connected to both sides of the economizer shell. The surface of the locking block engages with the inner cavity of the slot.

[0009] Preferably, a limiting block is fixedly connected to the end of the support column away from the disassembly seat, and a spring is sleeved on the outer surface of the support column, with the spring located between the limiting block and the disassembly seat.

[0010] Preferably, the disassembly and assembly mechanism is provided in two sets, which are symmetrically distributed at the upper and lower ends of the economizer shell.

[0011] Preferably, the inner cavity of the economizer shell is provided with a fixing plate, which is located on the lower surface of the filter plate.

[0012] Preferably, the combined structure includes a connecting plate and a support plate. The connecting plate is welded and fixed to the bottom end of the economizer shell, and the support plate is rotatably connected to the top end of the economizer shell via a rotating shaft. Bolt holes are provided on the surfaces of both the connecting plate and the support plate, and the connecting plate and the support plate are bolted together by fasteners.

[0013] Preferably, a support leg is fixedly connected to the lower surface of the economizer shell, and a support groove is formed on the upper surface of the economizer shell, with the surface of the support leg engaging with the inner cavity of the support groove.

[0014] Preferably, the support legs are provided in four sets, and the four sets of support legs are symmetrically distributed on the lower surface of the economizer shell.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model provides a boiler staged economizer assembly. Through the setting of filter plates, impurities in the high-temperature flue gas entering through the flue gas inlet can be filtered. By cooperating with multiple economizer shells, the high-temperature flue gas can be filtered in stages, thereby improving the working efficiency of the staged economizer and preventing the flue gas from polluting the surrounding environment when it is discharged.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the economizer housing with the filter plate disassembled.

[0021] Figure 4 This is a schematic diagram of a partial cross-section of the present invention.

[0022] In the diagram: 1. Economizer shell; 2. Flue gas inlet; 3. Flue gas outlet; 4. Filter plate; 5. Disassembly and assembly mechanism; 51. Sealing seat; 52. Disassembly and assembly seat; 53. Slot; 54. Locking block; 55. Support column; 6. Heat exchange tube; 7. Water inlet; 8. Water outlet; 9. Combined structure; 90. Connecting plate; 91. Support plate; 10. Limiting block; 11. Spring; 12. Fixing plate; 13. Support leg; 14. Support groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a boiler staged economizer assembly, including several sets of economizer shells 1, of which three sets are used as an example in this embodiment.

[0025] The top of the economizer shell 1 is provided with a flue gas inlet 2, the bottom of the economizer shell 1 is provided with a flue gas outlet 3, the outer wall of the economizer shell 1 is provided with a connection port, the inner cavity of the connection port is slidably inserted with a filter plate 4, one end of the filter plate 4 is provided with a disassembly and assembly mechanism 5 for quick disassembly and assembly from the shell, the inner cavity of the economizer shell 1 is provided with a heat exchange tube 6, the top of the heat exchange tube 6 penetrates the economizer shell 1 and is provided with a water inlet 7, the bottom of the heat exchange tube 6 penetrates the economizer shell 1 and is provided with a water outlet 8, the economizer shell 1 is provided with three sets, and the three sets of economizer shell 1 are provided with a combination structure 9 for easy assembly;

[0026] After the three economizer shells 1 are assembled by the combination structure 9, the top flue gas inlet 2 is connected to the boiler. Through the setting of the filter plate 4, impurities in the high-temperature flue gas entering through the flue gas inlet 2 can be filtered. Through the setting of the disassembly and assembly mechanism 5, it is convenient to clean and replace the filter plate 4 later. With the cooperation of the three economizer shells 1, the high-temperature flue gas can be filtered in stages to filter impurities in the high-temperature flue gas, thereby improving the working efficiency of the staged economizer and avoiding pollution of the surrounding environment when the flue gas is discharged.

[0027] The disassembly and assembly mechanism 5 includes a sealing seat 51, the surface of which is welded and fixed to one end of the filter plate 4. Disassembly and assembly seats 52 are provided on both sides of the sealing seat 51. The surface of the disassembly and assembly seat 52 has a through hole. A support column 55 is slidably inserted into the inner cavity of the through hole of the disassembly and assembly seat 52. One end of the support column 55 is welded and fixed to the surface of the disassembly and assembly seat 52. A slot 53 is fixedly connected to the surface of the disassembly and assembly seat 52. A locking block 54 is fixedly connected to both sides of the economizer shell 1. The surface of the locking block 54 engages with the inner cavity of the slot 53. When the sealing seat 51 contacts the surface of the economizer shell 1, the disassembly and assembly seats 52 at both ends move toward the locking block 54, so that the locking block 54 moves into the inner cavity of the slot 53, thereby positioning the position of the filter plate 4 inside the economizer shell 1.

[0028] The end of the support column 55 away from the disassembly base 52 is fixedly connected to the limiting block 10. A spring 11 is sleeved on the outer surface of the support column 55. The spring 11 is located between the limiting block 10 and the disassembly base 52. Through the cooperation of the limiting block 10 and the spring 11, the disassembly base 52 can be pushed to move continuously toward the locking block 54, thereby improving the stability of the locking block 54 in the locking slot 53.

[0029] There are two sets of disassembly and assembly mechanisms 5, which are symmetrically distributed at the upper and lower ends of the economizer shell 1. By setting the disassembly and assembly mechanisms 5, one set of economizer shell 1 can be equipped with two sets of filter plates 4 to improve the filtration efficiency of high-temperature flue gas, thereby improving the filtration quality of flue gas by the economizer shell 1.

[0030] A fixing plate 12 is provided in the inner cavity of the economizer shell 1. The fixing plate 12 is located on the lower surface of the filter plate 4. The fixing plate 12 can support the bottom of the filter plate 4, thereby improving the stability of the filter plate 4 inside the economizer shell 1.

[0031] The combined structure 9 includes a connecting plate 90 and a support plate 91. The connecting plate 90 is welded and fixed to the bottom end of the economizer shell 1. The support plate 91 is rotatably connected to the top end of the economizer shell 1 via a rotating shaft. Bolt holes are provided on the surfaces of both the connecting plate 90 and the support plate 91. The connecting plate 90 and the support plate 91 are bolted together by fasteners. After adjusting the angle of the support plate 91, the connecting plate 90 and the support plate 91 are combined. After combination, bolts are inserted into the bolt holes and engaged with nuts for bolting and fixing.

[0032] A support leg 13 is fixedly connected to the lower surface of the economizer housing 1, and a support groove 14 is provided on the upper surface of the economizer housing 1. The surface of the support leg 13 is engaged with the inner cavity of the support groove 14. Through the engagement of the support leg 13 and the support groove 14, the connection between the economizer housings 1 is supported, preventing angular rotation and displacement after the economizer housings 1 are connected, thus improving the stability after connection.

[0033] There are four sets of support legs 13, which are symmetrically distributed on the lower surface of the economizer shell 1. The support legs 13 improve the support effect between the economizer shells 1.

[0034] In practical use: First, adjust the angle of the support plate 91, combine the connecting plate 90 with the support plate 91 to combine the two economizer shells 1, then insert the bolts into the bolt holes and use the nuts to bolt and fix them. Then, use the same method to combine the other economizer shell 1. After the combination is completed, the flue gas inlet 2 is connected to the boiler. When the boiler exhausts flue gas, the high-temperature flue gas passes through the filter plate 4 from top to bottom. The filter plate 4 filters the impurities in the flue gas. When disassembling, push the disassembly seats 52 at both ends outward to move the locking block 54 out of the inner cavity of the locking groove 53, so that the filter plate 4 can be disassembled and replaced, thereby improving the working efficiency of the staged economizer and avoiding pollution of the surrounding environment when the flue gas is discharged.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler staged economizer assembly, characterized in that, include: Several sets of economizer shells (1), with a flue gas inlet (2) provided at the top of the economizer shell (1); The bottom end of the economizer shell (1) is provided with a flue gas outlet (3), and the outer side wall of the economizer shell (1) is provided with a connection port. A filter plate (4) is slidably inserted into the inner cavity of the connection port. One end of the filter plate (4) is provided with a disassembly and assembly mechanism (5) that facilitates quick disassembly and assembly from the shell. The inner cavity of the economizer shell (1) is provided with a heat exchange tube (6). The top end of the heat exchange tube (6) penetrates the economizer shell (1) and is provided with a water inlet (7). The bottom end of the heat exchange tube (6) penetrates the economizer shell (1) and is provided with a water outlet (8).

2. The boiler staged economizer assembly according to claim 1, characterized in that: The disassembly and assembly mechanism (5) is provided in two sets, and the two sets of disassembly and assembly mechanisms (5) are symmetrically distributed at the upper and lower ends of the economizer shell (1).

3. A boiler staged economizer assembly according to claim 2, characterized in that: The disassembly and assembly mechanism (5) includes a sealing seat (51), the surface of which is welded and fixed to one end of the filter plate (4). Disassembly and assembly seats (52) are provided on both sides of the sealing seat (51). A through hole is opened on the surface of the disassembly and assembly seat (52). A support column (55) is slidably inserted into the inner cavity of the through hole of the disassembly and assembly seat (52). One end of the support column (55) is welded and fixed to the surface of the disassembly and assembly seat (52). A slot (53) is fixedly connected to the surface of the disassembly and assembly seat (52). A locking block (54) is fixedly connected to both sides of the economizer shell (1). The surface of the locking block (54) engages with the inner cavity of the slot (53).

4. A boiler staged economizer assembly according to claim 3, characterized in that: The end of the support column (55) away from the disassembly seat (52) is fixedly connected to a limiting block (10), and a spring (11) is sleeved on the outer surface of the support column (55). The spring (11) is located between the limiting block (10) and the disassembly seat (52).

5. A boiler staged economizer assembly according to claim 1, characterized in that: The inner cavity of the economizer shell (1) is provided with a fixing plate (12), which is located on the lower surface of the filter plate (4).

6. A boiler staged economizer assembly according to claim 1, characterized in that: A combination structure (9) is provided between several groups of economizer shells (1) to facilitate assembly.

7. A boiler staged economizer assembly according to claim 6, characterized in that: The combined structure (9) includes a connecting plate (90) and a support plate (91). The connecting plate (90) is welded and fixed to the bottom end of the economizer shell (1). The support plate (91) is rotatably connected to the top end of the economizer shell (1) through a rotating shaft. Bolt holes are provided on the surfaces of both the connecting plate (90) and the support plate (91). The connecting plate (90) and the support plate (91) are bolted together by fasteners.

8. A boiler staged economizer assembly according to claim 1, characterized in that: The lower surface of the economizer housing (1) is fixedly connected to a support leg (13), and the upper surface of the economizer housing (1) is provided with a support groove (14). The surface of the support leg (13) is engaged with the inner cavity of the support groove (14).

Images