Condensate water discharging device for flue gas waste heat recoverer

Abstract

The utility model relates to the technical field of flue gas waste heat recovery, in particular to a condensate water discharging device for a flue gas waste heat recoverer, which comprises a tank body, a cylindrical filter screen is arranged in the tank body, and the upper end and the lower end of the filter screen extend towards the inner wall of the tank body to form a plug, so that condensate water flows from inside to outside to be filtered. A driving mechanism is arranged at the top of the rotating shaft and used for driving the rotating shaft to rotate; a cleaning assembly is arranged at the lower part of the rotating shaft and rotates along with the rotating shaft to scrape impurities on the filter screen; impurities on the filter screen are convenient to clean and the filtering efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of flue gas waste heat recovery technology, and in particular to a condensate discharge device for a flue gas waste heat recovery unit. Background Technology

[0002] Flue gas waste heat recovery units are usually installed at the boiler flue. They are used to recover the heat of boiler flue gas and exchange heat with the tap water pipes inside the unit. During the operation of the flue gas waste heat recovery unit, a large amount of condensate is generated after the flue gas exchanges heat with the tap water pipes. The generated condensate is collected, treated and then discharged.

[0003] Due to the long-term operation of the boiler, some solid particulate matter, such as rust, deposits and other impurities, are generated and suspended in the flue gas. During the flue gas waste heat recovery process, the condensate produced will accumulate at the bottom of the inner cavity of the flue gas waste heat recovery unit. If the condensate is not treated in time, the impurities in the flue gas will settle at the bottom of the inner cavity of the flue gas waste heat recovery unit. These deposits will have an adverse effect on the operation of the flue gas waste heat recovery unit.

[0004] In flue gas waste heat recovery units, condensate is usually filtered before being discharged. Generally, a filter screen is directly installed in the condensate collection tank. However, a large amount of impurities and sediments in the condensate will cover the filter screen, causing it to become clogged, making cleaning inconvenient, resulting in poor filtration effect and low filtration efficiency.

[0005] Therefore, this application provides a condensate discharge device for a flue gas waste heat recovery unit to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to provide a condensate discharge device for a flue gas waste heat recovery unit, which solves the problems of inconvenient cleaning of impurities on existing filter screens and low filtration efficiency.

[0007] To solve the above-mentioned technical problems, this utility model provides a condensate discharge device for a flue gas waste heat recovery unit, including a tank. A cylindrical filter screen is installed inside the tank, with the upper and lower ends of the filter screen extending towards the inner wall of the tank to form a blockage, allowing condensate to flow from the inside to the outside for filtration. A rotating shaft is installed inside the tank, with a drive mechanism at the top of the rotating shaft for driving the rotating shaft to rotate. A cleaning component is installed at the bottom of the rotating shaft, which scrapes away impurities from the filter screen as the rotating shaft rotates.

[0008] A further improvement of the present invention is that the cleaning component includes at least one scraper, one end of which is attached to the filter screen for removing dirt from the filter screen.

[0009] A further improvement of the present invention is that the cleaning component also includes several mounting brackets that are fixedly arranged at equal intervals, and scrapers are detachably connected to the mounting brackets.

[0010] A further improvement of the present invention is that the tank is divided into a detachable upper part, a middle part, and a lower part. The upper part is provided with a liquid inlet, the middle part with a liquid outlet, and the bottom with a drain outlet.

[0011] A further improvement of this utility model is that the upper part, middle part and lower part of the tank are connected by bolts to achieve a detachable connection.

[0012] A further improvement of this utility model is that the tank body is made of carbon steel, which can improve the strength and corrosion resistance of the tank body.

[0013] A further improvement of the present invention is that the drive mechanism includes a motor and a transmission mechanism, wherein the transmission mechanism converts the rotational motion of the motor into the rotational motion of the shaft.

[0014] A further improvement of the present invention is that the transmission mechanism consists of two meshing horizontal bevel gears and a vertical bevel gear, with the vertical bevel gear connected to the output end of the motor and the horizontal bevel gear connected to the top end of the rotating shaft.

[0015] A further improvement of this utility model is that valves are provided at the inlet, outlet, and drain to control the entry and discharge of fluids.

[0016] A further improvement of this utility model is that a Y-shaped limiting piece and a limiting ring are provided at the bottom of the rotating shaft. The Y-shaped limiting piece and the limiting ring are integrally set, and the outer end face of the limiting ring is engaged in the groove at the bottom of the inner wall of the tank to prevent lateral displacement when the rotating shaft rotates.

[0017] By adopting the above technical solution, this utility model has the following beneficial effects:

[0018] 1. This utility model provides a condensate discharge device for a flue gas waste heat recovery unit. This device uses a cylindrical filter screen installed inside the tank, with the screen placed vertically. Compared to traditional horizontally or inclined filters, this makes the screen less prone to clogging, improving filtration efficiency. The filter screen extends towards the inner wall of the tank at both ends to form a seal. When condensate enters the tank through the inlet, it enters the filter screen, allowing the condensate to flow from the inside out for filtration. A certain gap exists between the filter screen and the inner wall of the tank. If there is no gap, only liquid will be discharged. There is a pressure difference between the inside and outside of the condensate at the outlet. The condensate is mainly filtered by the filter screen at the outlet. Impurities in the condensate will accumulate at the filter screen at the outlet, and the problem of filter screen blockage still exists. However, the gap between the filter screen and the inner wall of the tank allows the filtered condensate to be temporarily stored in the gap when the outlet is closed. When it needs to be discharged, the outlet is opened. During the flow of condensate, a pressure difference is generated inside and outside the filter screen, causing the condensate to flow from the inside to the outside. This increases the utilization rate of the filter screen, greatly reduces the probability of filter screen blockage, and improves filtration efficiency.

[0019] 2. This utility model provides a condensate discharge device for a flue gas waste heat recovery unit. The discharge device has a cleaning component installed at the lower part of the rotating shaft inside the tank. The cleaning component includes several mounting brackets that are fixedly arranged at equal intervals. Scrapers are detachably connected to the mounting brackets. One end face of the scraper is in contact with the filter screen. The motor drives the rotating shaft to rotate, and the rotating shaft drives the scraper to rotate along the inner side of the filter screen to clean the filter screen of impurities. The cleaning is efficient, time-saving and labor-saving. The scraper is detachably connected, so it is easy to replace the scraper when it is damaged.

[0020] 3. The present invention provides a condensate discharge device for a flue gas waste heat recovery unit. The discharge device is provided by setting a Y-shaped limiting plate and a limiting ring at the bottom of the rotating shaft. The Y-shaped limiting plate and the limiting ring are integrally set. The outer end face of the limiting ring is engaged in the groove at the bottom of the inner wall of the tank. When the rotating shaft rotates, the limiting ring can only rotate in the groove, which can prevent the rotating shaft from shifting laterally. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is an overall schematic diagram of a condensate discharge device for a flue gas waste heat recovery unit.

[0023] Figure 2 This is a partial sectional view;

[0024] Figure 3 A partial sectional view from another perspective;

[0025] Figure 4 This is an enlarged schematic diagram of the bottom of the inner cavity of the tank;

[0026] Figure 5 This is a schematic diagram of the cleaning component.

[0027] Figure 6 This is a schematic diagram of the drive mechanism and the transmission mechanism;

[0028] Figure 7 This is a schematic diagram of the structure of the Y-shaped limiting piece and the limiting ring.

[0029] Reference numerals: 1. Tank body; 2. Filter screen; 3. Rotating shaft; 4. Drive mechanism; 5. Cleaning assembly; 6. Scraper; 7. Mounting bracket; 8. Upper part of tank body; 9. Middle part of tank body; 10. Lower part of tank body; 11. Liquid inlet; 12. Liquid outlet; 13. Sewage outlet; 14. Motor; 15. Transmission mechanism; 16. Horizontal bevel gear; 17. Vertical bevel gear; 18. Y-shaped limiting plate; 19. Limiting ring; 20. Groove. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The present invention will be further explained below with reference to specific embodiments.

[0034] like Figures 1-7 As shown, this embodiment provides a condensate discharge device for a flue gas waste heat recovery unit, including a tank 1. A cylindrical filter screen 2 is installed inside the tank 1. The upper and lower ends of the filter screen 2 extend towards the inner wall of the tank 1 to form a seal. A rotating shaft 3 is installed inside the tank 1, and a driving mechanism 4 is installed at the top of the rotating shaft 3. A cleaning component 5 is installed at the lower part of the rotating shaft 3. The cleaning component 5 rotates with the rotating shaft 3 to scrape off impurities on the filter screen 2. Preferably, the tank 1 is made of carbon steel, which can improve the strength and corrosion resistance of the tank 1. The cylindrical filter screen 2 is installed inside the tank 1, that is, the filter screen 2 is placed vertically. Compared with the traditional horizontal or inclined filter screen 2, the filter screen 2 is not easy to clog, thus improving the filtration efficiency. Two annular sealing plates are respectively installed at the upper and lower ends of the filter screen 2. The outer side of the sealing plate abuts against the inner wall of the tank 1, and the inner side of the sealing plate is fixedly connected to the filter screen 2. The two annular sealing plates and the filter screen 2 work together. The filter screen 2 is sealed off, and a gap exists between it and the inner wall of the tank 1. When condensate enters, it first enters the inner side of the filter screen 2, and only after being filtered can it flow into the gap, preventing unfiltered condensate from being discharged directly. If there were no gap, there would only be a pressure difference between the inside and outside of the condensate at the outlet 12. The condensate would mainly rely on the filter screen 2 at the outlet 12 for filtration, and impurities in the condensate would accumulate at the filter screen 2 at the outlet 12, still resulting in the problem of filter screen 2 clogging. However, with the gap between the filter screen 2 and the inner wall of the tank 1, when the outlet 12 is closed, the filtered condensate will be temporarily stored in the gap. When it needs to be discharged, the outlet 12 is opened, and during the flow of condensate, a pressure difference will be generated between the inside and outside of the filter screen 2, causing the condensate to flow from the inside to the outside. This increases the utilization rate of the filter screen 2, greatly reduces the probability of filter screen 2 clogging, and results in higher filtration efficiency.

[0035] like Figures 2-6As shown, a rotating shaft 3 is installed inside the tank body 1. The rotating shaft 3 serves as a connecting component. The top of the rotating shaft 3 is connected to the drive mechanism 4, and the lower part of the rotating shaft 3 is connected to the cleaning component 5. A Y-shaped limiting piece 18 and a limiting ring 19 are also provided at the lower end of the rotating shaft 3. Preferably, the Y-shaped limiting piece 18 and the limiting ring 19 are integrally formed, and the outer end face of the limiting ring 19 is engaged in the groove 20 at the bottom of the inner wall of the tank body 1. The drive mechanism 4 includes a motor 14 and a transmission mechanism 15. The transmission mechanism 15 converts the rotational motion of the motor 14 into the rotational motion of the rotating shaft 3. Preferably, the transmission mechanism 15 consists of two meshing horizontal bevel gears 16 and a vertical bevel gear 17. The vertical bevel gear 17 is connected to the output end of the motor 14, and the horizontal bevel gear 16 is connected to the top end of the rotating shaft 3. Thus, the rotating shaft 3 can be driven to rotate by the rotation of the motor 14.

[0036] like Figures 3-5 As shown, the cleaning assembly 5 includes several mounting brackets 7 fixedly mounted at equal intervals on the rotating shaft 3. Scrapers 6 are detachably connected to the mounting brackets 7, with at least one scraper 6. The outer end face of the scraper 6 is in contact with the filter screen 2 to remove dirt and impurities from the filter screen 2. The mounting brackets 7 are fixedly connected to the rotating shaft 3, and the scrapers 6 are connected to the mounting brackets 7 by bolts. When the scraper 6 is damaged, it can be removed simply by unscrewing the bolts, making replacement convenient. The motor 14 drives the rotating shaft 3 to rotate, and the rotating shaft 3 drives the scraper 6 to rotate along the inner side of the filter screen 2 to clean impurities from the filter screen 2, resulting in efficient, time-saving, and labor-saving cleaning.

[0037] like Figures 4-7 As shown, a Y-shaped limiting piece 18 and a limiting ring 19 are provided at the bottom of the rotating shaft 3. The Y-shaped limiting piece 18 and the limiting ring 19 are integrally set. The outer end face of the limiting ring 19 is engaged in the groove 20 at the bottom of the inner wall of the tank 1. When the rotating shaft 3 rotates, the limiting ring 19 can only rotate within the groove 20, which can prevent the rotating shaft 3 from shifting laterally. When using multiple scrapers 6, each scraper 6 can clean the filter screen 2, improving cleaning efficiency.

[0038] like Figures 1-4 As shown, the tank 1 is divided into a detachable upper part 8, a middle part 9, and a lower part 10. The upper part 8, the middle part 9, and the lower part 10 are detachably connected, which facilitates the overall installation and allows for easy maintenance in case one or more components inside the tank 1 are damaged. The upper part 8 is provided with a liquid inlet 11, the middle part 9 is provided with a liquid outlet 12, and the bottom of the tank 1 is provided with a drain outlet 13. The upper part 8, the middle part 9, and the lower part 10 are connected by bolts to achieve a detachable connection. Valves are provided at the liquid inlet 11, the liquid outlet 12, and the drain outlet 13 to control the entry and exit of fluids. Sealing gaskets are provided between the upper part 8 and the middle part 9, and between the middle part 9 and the lower part 10, to ensure the overall sealing of the tank 1.

[0039] The filtration principle of this invention is as follows:

[0040] Condensate enters the tank 1 through the inlet 11. Because the filter screen 2 inside the tank 1 has annular sealing plates at both ends, the condensate flows into the area enclosed by the filter screen 2. The condensate is filtered from the inside out. When the outlet 12 is not open, the filtered condensate is stored in the gap between the filter screen 2 and the inner wall of the tank 1. After the outlet 12 is opened, the filtered condensate is discharged through the outlet 12 and flows into the next process. At this time, there is a pressure difference between the inside and outside of the filter screen 2, causing the condensate inside the filter screen 2 to flow towards the outside. The filter is filtered by airflow from all sides, resulting in high utilization of the filter screen 2 and good filtration effect. When it is necessary to clean the filter screen 2 inside the tank 1, the motor 14 is turned on, and the transmission mechanism 15 connected to the output end of the motor 14 converts the rotation of the motor 14 into the rotation of the shaft 3. The rotation of the shaft 3 will drive the cleaning component 5 to rotate inside the tank 1. The scraper 6 on the cleaning component 5 scrapes off the impurities on the filter screen 2. The scraped impurities will fall into the bottom of the tank 1. At this time, the drain port 13 can be opened to discharge the impurities and sediment.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A condensed water discharge device for a flue gas waste heat recovery device, characterized by, The utility model relates to a kind of condensate water filter, including tank (1), cylinder filter screen (2) is provided in tank (1), filter screen (2) upper and lower two ends extend to the inner wall of tank (1) and form plugging, make condensate water flow from inside to outside and filter, shaft (3) is provided in tank (1), drive mechanism (4) is provided in the top of shaft (3), and drive mechanism (4) is used to drive shaft (3) rotation;Shaft (3) lower part is provided with cleaning assembly (5), and cleaning assembly (5) rotates with shaft (3) and removes the impurity on filter screen (2).

2. A condensate drain device for a flue gas heat recovery unit according to claim 1, characterized in that, Cleaning assembly (5) includes at least one scraper (6), one end surface of scraper (6) is attached to filter screen (2), for removing dirt on filter screen (2).

3. A condensate drain device for a flue gas heat recovery unit according to claim 2, characterized in that, Cleaning assembly (5) further includes several equidistantly fixed mounting racks (7), scraper (6) is detachably connected on mounting rack (7).

4. The condensed water discharge device for a flue gas waste heat recovery device according to claim 1, characterized by Tank (1) is divided into detachable tank upper part (8), tank middle part (9) and tank lower part (10), tank upper part (8) is provided with liquid inlet (11), tank middle part (9) is provided with liquid outlet (12), and tank (1) bottom is provided with blow-off port (13).

5. A condensate drain device for a flue gas heat recovery unit according to claim 4, characterized in that, Tank upper part (8), tank middle part (9) and tank lower part (10) are connected by bolts, realizing detachable connection.

6. A condensate drain device for a flue gas heat recovery unit according to claim 5, characterized in that The material of tank (1) is carbon steel, which can improve the strength and corrosion resistance of tank (1).

7. A condensate drain device for a flue gas heat recovery unit according to claim 1, wherein Drive mechanism (4) includes motor (14) and transmission mechanism (15), and transmission mechanism (15) converts the rotary motion of motor (14) into the rotary motion of shaft (3).

8. A condensate drain device for a flue gas heat recovery unit according to claim 7, characterized in that Transmission mechanism (15) is two mutually meshing horizontal bevel gears (16) and vertical bevel gears (17), vertical bevel gears (17) are connected with the output end of motor (14), and horizontal bevel gears (16) are connected with the top end of shaft (3).

9. A condensate drain device for a flue gas heat recovery unit according to claim 1, wherein Liquid inlet (11), liquid outlet (12) and blow-off port (13) are provided with valves for controlling the entry and discharge of fluid.

10. A condensate drain device for a flue gas heat recovery unit according to claim 1, characterized in that, The bottom end of shaft (3) is provided with Y-shaped limiting sheet (18) and limiting ring (19), Y-shaped limiting sheet (18) and limiting ring (19) are integrally provided, the outer end surface of limiting ring (19) is clamped in the groove (20) of the inner wall bottom of tank (1), to prevent shaft (3) from occurring lateral deviation when rotating.

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