Plate type low-temperature economizer

Abstract

The utility model discloses a plate type low-temperature economizer, which relates to the technical field of low-temperature economizers and comprises a low-temperature economizer shell and a snakelike pipeline assembly arranged in the low-temperature economizer shell, a smoke inlet is fixedly arranged on one side of the top of the low-temperature economizer shell, and a smoke outlet is fixedly arranged on one side of the bottom of the low-temperature economizer shell. A circulating assembly is arranged at the top of the front side of the low-temperature economizer shell and used for circulating a water source in the S-shaped pipeline assembly, the heat exchange effect of smoke is improved conveniently, and a dust scraping assembly is arranged on the S-shaped pipeline assembly in a sliding mode and used for scraping dust on the outer wall of the S-shaped pipeline assembly, so that the dust is prevented from affecting the heat exchange effect of the smoke. The second connecting rod and the bottom block are driven to move and the dust scraping ring is driven to scrape dust on the outer wall of the snakelike pipeline assembly by pulling the concentric-square-shaped frame, so that the situation that dust is dense on the outer wall of the snakelike pipeline assembly and influences the heat exchange effect of flue gas is avoided, and the heat exchange efficiency of the flue gas is improved.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature economizer technology, specifically a plate-type low-temperature economizer. Background Technology

[0002] A low-temperature economizer is a flue gas heat exchanger device, typically combined with electrostatic precipitator technology. It cools the flue gas to below its acid dew point temperature, significantly improving dust removal efficiency and reducing PM2.5 emissions to meet power plant emission requirements. Essentially, low-temperature economizers achieve heat transfer through heat exchange between a high-temperature fluid and a low-temperature medium, thus lowering the flue gas temperature. As the flue gas medium temperature decreases, the corresponding low-temperature medium temperature increases, achieving waste heat recovery.

[0003] For example, a low-temperature economizer according to Chinese patent application number CN201920072976.8 includes a shell, a water tank on one side of the shell, a flue gas inlet and a flue gas outlet, a heat exchange tube bundle inside the shell, with a water inlet and an outlet at both ends of the heat exchange tube bundle, and a flue gas outlet connected to a flue gas outlet pipe, which is wound around the outer wall of the water tank. The advantage of this invention is that a filter device is connected to the flue gas inlet, effectively filtering particulate matter in the flue gas layer by layer. This results in a good filtration effect, preventing particulate matter from entering the shell and causing blockage at the flue gas outlet, thus effectively ensuring the stable operation of the economizer.

[0004] However, in actual use, the heat exchange tube bundles in the above-mentioned device are used for a long time, and the flue gas easily forms dirt on the outer wall of the tube bundles, which affects the heat exchange effect of the heat exchange tube bundles and reduces the efficiency of use. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a plate-type low-temperature economizer. By pulling and retracting the spiral frame, the second connecting rod and the bottom block move, which in turn causes the dust scraper ring to scrape dust off the outer wall of the serpentine pipe assembly. This prevents dust from accumulating on the outer wall of the serpentine pipe assembly and affecting the heat exchange effect of the flue gas, thereby improving the efficiency of flue gas heat exchange and effectively solving the problems in the background technology.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a plate-type low-temperature economizer, comprising a low-temperature economizer shell and a serpentine pipe assembly disposed inside the low-temperature economizer shell, wherein a smoke inlet is fixedly provided on one side of the top of the low-temperature economizer shell and a smoke outlet is fixedly provided on one side of the bottom of the low-temperature economizer shell;

[0007] The top front side of the low-temperature economizer shell is equipped with a circulation component for circulating the water source inside the serpentine pipe assembly, which facilitates the improvement of the heat exchange effect of the flue gas.

[0008] The serpentine pipe assembly is slidably equipped with a dust scraper for scraping off dust from the outer wall of the serpentine pipe assembly, so as to prevent dust from affecting the heat exchange effect of flue gas.

[0009] The dust scraping assembly includes several collars, which are respectively fitted onto the serpentine pipe assembly. Each collar is connected to a first connecting rod. Each of the four corner collars is fixed with a base block, and a second connecting rod is fixed to the top of each base block. The top ends of the four second connecting rods penetrate the top of the low-temperature economizer shell, and the same U-shaped frame is fixed between the top ends of the four second connecting rods.

[0010] Preferably, a dust scraper ring is fixedly provided inside the collar, and a connecting plate is fixedly provided between the two sides inside the spiral frame. The connecting plate is located at the top of the low-temperature economizer shell, which makes it convenient for the operator to manually pull the connecting plate to drive the spiral frame to rise or fall.

[0011] Preferably, the circulation component includes a drive frame, which is fixedly disposed on the top front side of the low-temperature economizer housing. A water pump is fixedly disposed inside the drive frame, and an L-shaped connecting pipe is fixedly disposed at the outlet of the water pump. The end of the L-shaped connecting pipe away from the water pump passes through the drive frame and is fixedly connected to one end of the serpentine pipe assembly, so that the water pump can draw water out of the serpentine pipe assembly through the L-shaped connecting pipe.

[0012] Preferably, the water pump inlet is fixedly provided with a connecting pipe, the end of the connecting pipe away from the water pump passes through the drive frame and is fixedly provided with a water tank, and a drain pipe is fixedly provided at the bottom of the water tank to facilitate the discharge of water inside the water tank.

[0013] Preferably, a U-shaped connecting pipe is fixedly provided at the end of the serpentine pipe assembly away from the L-shaped connecting pipe, and one end of the U-shaped connecting pipe is fixedly connected to the water tank, so that the water source inside the water tank can circulate into the serpentine pipe assembly through the U-shaped connecting pipe.

[0014] Preferably, support columns are fixed at the four corners of the bottom of the low-temperature economizer shell to facilitate support of this utility model.

[0015] Compared with the prior art, this utility model provides a plate-type low-temperature economizer, which has the following beneficial effects:

[0016] 1. Water is drawn from the water tank through the water pump inlet into the L-shaped connecting pipe and flows into the serpentine pipe assembly. The water at the end of the serpentine pipe assembly flows back into the water tank through the U-shaped connecting pipe, thus realizing the circulation of water in the serpentine pipe assembly. Finally, the flue gas inlet is connected to discharge the flue gas to be treated into the low-temperature economizer shell to achieve heat exchange and improve the heat exchange effect.

[0017] 2. By manually pulling the connecting plate, the spiral frame rises or falls, which in turn moves the bottom block at the bottom of the second connecting rod. The movement of the bottom block causes several rings fixed to it and the first connecting rod to move up and down. The movement of the bottom block causes the dust scraper ring to scrape dust off the outer wall of the serpentine pipe assembly, thereby preventing dust from accumulating on the outer wall of the serpentine pipe assembly and affecting the heat exchange effect of the flue gas, thus improving the efficiency of flue gas heat exchange. 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 rear view of the overall structure of this utility model;

[0020] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 4 A schematic diagram of the overall structure of this utility model without the low-temperature economizer shell structure;

[0022] Figure 5 This is a schematic diagram of the dust scraper assembly structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the circulating component structure of this utility model.

[0024] In the diagram: 1 Low-temperature economizer shell, 2 Flue gas inlet, 3 Flue gas outlet, 4 Dust scraper assembly, 5 Circulation assembly, 6 Serpentine pipe assembly, 7 Support column;

[0025] 41. Collar ring, 42. Dust scraper ring, 43. First connecting rod, 44. Base block, 45. Second connecting rod, 46. U-shaped frame, 47. Connecting plate, 51. Drive frame, 52. Water pump, 53. Connecting pipe, 54. Water tank, 55. Drain pipe, 56. U-shaped connecting pipe, 57. L-shaped connecting pipe. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-6 As shown, this utility model provides a plate-type low-temperature economizer, including a low-temperature economizer shell 1 and a serpentine pipe assembly 6 disposed inside the low-temperature economizer shell 1. A smoke inlet 2 is fixedly provided on one side of the top of the low-temperature economizer shell 1, and a smoke outlet 3 is fixedly provided on one side of the bottom of the low-temperature economizer shell 1. Support columns 7 are fixedly provided at the four corners of the bottom of the low-temperature economizer shell 1 to facilitate the support of this utility model.

[0028] like Figure 1-4As shown in Figure 6, a circulation component 5 is provided on the top front side of the low-temperature economizer shell 1 to circulate the water source inside the serpentine pipe assembly 6, thereby improving the heat exchange effect of the flue gas. The circulation component 5 includes a drive frame 51, which is fixedly installed on the top front side of the low-temperature economizer shell 1. A water pump 52 is fixedly installed inside the drive frame 51. An L-shaped connecting pipe 57 is fixedly installed at the outlet of the water pump 52. The end of the L-shaped connecting pipe 57 away from the water pump 52 passes through the drive frame 51 and is fixedly connected to one end of the serpentine pipe assembly 6, so that the water pump 52 can draw water out of the serpentine pipe assembly 6 through the L-shaped connecting pipe 57.

[0029] The water pump 52 has a fixed connecting pipe 53 at its inlet. The end of the connecting pipe 53 away from the water pump 52 passes through the drive frame 51 and is fixedly connected to a water tank 54. A drain pipe 55 is fixedly connected to the bottom of the water tank 54 to facilitate the discharge of water from inside the water tank 54. A U-shaped connecting pipe 56 is fixedly connected to the end of the serpentine pipe assembly 6 away from the L-shaped connecting pipe 57, and one end of the U-shaped connecting pipe 56 is fixedly connected to the water tank 54 to facilitate the circulation of water from inside the water tank 54 into the serpentine pipe assembly 6 through the U-shaped connecting pipe 56.

[0030] By setting up the circulation component 5, water is first added to the water tank 54, and then the water pump 52 inside the drive frame 51 starts to work. The water pump 52 draws water from the water tank 54 through the connecting pipe 53 to the L-shaped connecting pipe 57 and flows into the serpentine pipe assembly 6. The water at the end of the serpentine pipe assembly 6 flows back into the water tank 54 through the U-shaped connecting pipe 56, thereby realizing the circulation of water in the serpentine pipe assembly 6. Finally, the flue gas inlet 2 is connected to discharge the flue gas to be treated into the low-temperature economizer shell 1 to realize heat exchange and improve the heat exchange effect.

[0031] like Figure 1-5 As shown, a dust scraper assembly 4 is slidably provided on the serpentine pipe assembly 6 to scrape off the dust on the outer wall of the serpentine pipe assembly 6, so as to avoid the dust affecting the heat exchange effect of the flue gas. The dust scraper assembly 4 includes a plurality of collars 41, which are respectively sleeved on the serpentine pipe assembly 6. A first connecting rod 43 is connected between the plurality of collars 41. A base block 44 is fixedly provided on each of the four corner collars 41, and a second connecting rod 45 is fixedly provided on the top of the base block 44.

[0032] The top ends of the four second connecting rods 45 all penetrate the top of the low-temperature economizer shell 1, and the same U-shaped frame 46 is fixed between the top ends of the four second connecting rods 45. A dust scraper ring 42 is fixed inside the collar 41, and a connecting plate 47 is fixed between the two sides inside the U-shaped frame 46. The connecting plate 47 is located at the top of the low-temperature economizer shell 1, so that the operator can manually pull the connecting plate 47 to drive the U-shaped frame 46 to rise or fall.

[0033] By setting up the dust scraper assembly 4, after long-term use, the outer wall of the serpentine pipe assembly 6 is prone to dust accumulation, which is not conducive to the heat exchange of flue gas. The operator can manually pull the connecting plate 47 to drive the U-shaped frame 46 to rise or fall, which at the same time drives the bottom block 44 at the bottom of the second connecting rod 45 to move. The movement of the bottom block 44 causes several rings 41 and the first connecting rod 43 fixedly connected to it to move up and down. The movement of the bottom block 44 causes the dust scraper ring 42 to achieve the effect of scraping dust on the outer wall of the serpentine pipe assembly 6, thereby avoiding the accumulation of dust on the outer wall of the serpentine pipe assembly 6 and affecting the heat exchange effect of flue gas, thus improving the efficiency of flue gas heat exchange.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A plate-type cryogenic economizer, comprising a cryogenic economizer shell (1) and a serpentine pipe assembly (6) disposed inside the cryogenic economizer shell (1), characterized in that: The low-temperature economizer shell (1) is fixedly provided with a flue gas inlet (2) on one side of the top and a flue gas outlet (3) on one side of the bottom. The low-temperature economizer shell (1) is provided with a circulation component (5) on the top front side, which is used to circulate the water source inside the serpentine pipe assembly (6) to improve the heat exchange effect of flue gas. The serpentine pipe assembly (6) is slidably provided with a dust scraper assembly (4) for scraping off the dust on the outer wall of the serpentine pipe assembly (6) to prevent the dust from affecting the heat exchange effect of the flue gas. The dust scraper assembly (4) includes several collars (41), which are respectively fitted onto the serpentine pipe assembly (6). Each of the collars (41) is connected to a first connecting rod (43). Each of the four corner collars (41) is fixedly provided with a base block (44). The top of the base block (44) is fixedly provided with a second connecting rod (45). The top ends of the four second connecting rods (45) penetrate the top of the low-temperature economizer shell (1), and the top ends of the four second connecting rods (45) are fixedly provided with the same spiral frame (46).

2. A plate type cryogenic economizer according to claim 1, characterized in that: The collar (41) is fixedly provided with a dust scraper ring (42), and the inner sides of the spiral frame (46) are fixedly provided with a connecting plate (47), and the connecting plate (47) is located on the top of the low temperature economizer shell (1).

3. A plate type cryogenic economizer according to claim 1, characterized in that: The circulation component (5) includes a drive frame (51), which is fixedly installed on the top front side of the low-temperature economizer shell (1). A water pump (52) is fixedly installed inside the drive frame (51). An L-shaped connecting pipe (57) is fixedly installed at the outlet of the water pump (52). The end of the L-shaped connecting pipe (57) away from the water pump (52) passes through the drive frame (51) and is fixedly connected to one end of the serpentine pipe assembly (6).

4. A plate type cryogenic economizer according to claim 3, characterized in that: The water pump (52) has a fixed connecting pipe (53) at its water inlet. The end of the connecting pipe (53) away from the water pump (52) passes through the drive frame (51) and is fixedly provided with a water tank (54). The bottom of the water tank (54) is fixedly provided with a drain pipe (55).

5. A plate-type cryogenic economizer according to claim 4, characterized in that: The serpentine pipe assembly (6) is fixedly provided with a U-shaped connecting pipe (56) at one end away from the L-shaped connecting pipe (57), and one end of the U-shaped connecting pipe (56) is fixedly connected to the water tank (54).

6. A plate type cryogenic economizer according to claim 1, characterized in that: The low-temperature economizer shell (1) is fixed with support columns (7) at the four corners of its bottom.

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