Waste heat utilization device of spiral finned tube economizer

Abstract

The utility model discloses a waste heat utilization device of a spiral finned tube economizer, and relates to the technical field of steam generation. Comprising an economizer waste heat recovery box, a spiral finned tube, a water inlet pipe and a water outlet pipe, the spiral finned tube is fixedly installed in the economizer waste heat recovery box, and the water inlet pipe and the water outlet pipe are fixedly connected to the two ends of the spiral finned tube correspondingly. According to the flue gas dust removal device, dust contained in flue gas can be filtered and adsorbed by a filter plate, dust accumulated on the filter plate can be conveniently removed by a cleaning scraper, the filtering effect of the filter plate after long-time use is further improved, and through cooperation of four first threaded rods, three synchronizers and four cleaning brushes, the dust removal effect of the filter plate is improved. And the four cleaning brushes can clean smoke dust attached to the surface of the spiral finned tube, so that the spiral finned tube is prevented from being corroded by the smoke dust, and the service life of the spiral finned tube is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of steam generation, in particular to a waste heat utilization device of a spiral fin tube economizer. Background Art

[0002] With the rapid development of industry, energy consumption and waste heat emission have become important issues facing the world. Especially in the fields of coal-fired power generation, steel smelting, etc., a large amount of waste heat is not fully utilized, which not only wastes energy but also aggravates environmental pollution. Economizer, as an important thermal equipment, is widely used in various boilers and is of great significance for the recovery and reuse of waste heat.

[0003] During the long-term use of traditional economizers, smoke will accumulate inside the economizer over time to form a thick ash layer. The high-temperature smoke contains a variety of corrosive substances, such as sulfides, nitrides, etc. These substances come into contact with the economizer tube wall and may cause serious corrosion problems. Corrosion will not only reduce the service life of the economizer, but may also cause safety problems. Therefore, we propose a waste heat utilization device for a spiral fin tube economizer. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a waste heat utilization device for a spiral fin tube economizer, which can solve the problem that smoke accumulates inside the economizer to form a thick ash layer. The high-temperature smoke contains a variety of corrosive substances, such as sulfides, nitrides, etc. These substances come into contact with the economizer tube wall and may cause serious corrosion problems. The corrosion will not only reduce the service life of the economizer, but may also cause safety problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat utilization device for a spiral fin tube economizer, comprising an economizer waste heat recovery box, spiral fin tubes, a water inlet pipe and a water outlet pipe, the spiral fin tubes are fixedly installed inside the economizer waste heat recovery box, the water inlet pipe and the water outlet pipe are respectively fixedly connected to the two ends of the spiral fin tubes, four limiting slide grooves are opened on both sides of the inner wall of the economizer waste heat recovery box, and a smoke dust filtering structure is arranged on the economizer waste heat recovery box.

[0006] Preferably, the smoke filtering structure includes a filter plate and a filter cover, the filter plate is fixedly mounted on the top of the economizer waste heat recovery box, the filter cover is fixedly connected to the top of the filter plate, the top of the filter cover is fixedly connected with a smoke exhaust pipe, the inside of the filter cover is rotatably connected with a second threaded rod and a limit rod, one side of the filter cover is fixedly connected with a cleaning motor, the output end of the cleaning motor rotates through one side of the filter cover and is fixedly connected to the second threaded rod, and the inside of the filter cover is slidably connected with two collection boxes.

[0007] Preferably, a cleaning scraper is threadedly sleeved on the outer surface of the second threaded rod, and one end of the cleaning scraper away from the second threaded rod is slidably connected to the limit rod, and the cleaning scraper is in contact with the top of the filter plate.

[0008] Preferably, the insides of the four limiting slide grooves close to the cleaning motor are rotatably connected to the first threaded rods, the outer surfaces of the four first threaded rods are threadedly sleeved with cleaning brushes, and both ends of the four cleaning brushes are slidably connected to the corresponding limiting slide grooves.

[0009] Preferably, a drive motor is fixedly connected to one side of the economizer waste heat recovery box close to the water outlet pipe, and the output end of the drive motor rotates through one side of the economizer waste heat recovery box and is fixedly connected to the first threaded rod close to the cleaning motor.

[0010] Preferably, a synchronizer is provided on the side of the economizer waste heat recovery box close to the driving motor, and two identical synchronizers are provided on the side of the economizer waste heat recovery box away from the driving motor, and the four second threaded rods are transmission-connected via three synchronizers.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The waste heat utilization device of the spiral fin tube economizer, through the cooperation of the filter plate, the second threaded rod, the limit rod and the cleaning scraper, enables the filter plate to filter and absorb the dust contained in the flue gas, and the cleaning scraper is convenient for cleaning the dust accumulated on the filter plate, thereby improving the filtering effect of the filter plate after long-term use. With the cooperation of the four first threaded rods, three synchronizers and four cleaning brushes, the four cleaning brushes can clean the smoke and dust attached to the surface of the spiral fin tube to prevent the smoke and dust from corroding the spiral fin tube, thereby further improving the service life of the spiral fin tube.

[0013] (2) The waste heat utilization device of the spiral fin tube economizer has two collecting boxes arranged on the filter cover, so that the cleaning scraper can discharge the cleaned dust into the two collecting boxes, so that the two collecting boxes can centrally collect the cleaned dust, which is convenient for subsequent discharge and treatment, and further improves the use effect of the filtering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the filter cover structure of the utility model;

[0017] Figure 3This is a schematic diagram of the cross-sectional structure of the economizer waste heat recovery box of the utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter cover of the present utility model.

[0019] Figure numerals: 1. economizer waste heat recovery box; 2. water inlet pipe; 3. spiral fin tube; 4. water outlet pipe; 5. first threaded rod; 6. synchronizer; 7. drive motor; 8. cleaning motor; 9. filter cover; 10. filter plate; 11. collection box; 12. cleaning brush; 13. limit slide; 14. limit rod; 15. cleaning scraper; 16. second threaded rod. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] See also Figure 1-4The utility model provides a technical solution: a waste heat utilization device of a spiral fin tube economizer, comprising an economizer waste heat recovery box 1, a spiral fin tube 3, an inlet pipe 2 and an outlet pipe 4, the spiral fin tube 3 is fixedly installed inside the economizer waste heat recovery box 1, the inlet pipe 2 and the outlet pipe 4 are respectively fixedly connected to the two ends of the spiral fin tube 3, four limiting slide grooves 13 are opened on both sides of the inner wall of the economizer waste heat recovery box 1, and a smoke dust filtering structure is arranged on the economizer waste heat recovery box 1.

[0025] The smoke filtering structure includes a filter plate 10 and a filter cover 9. The filter plate 10 is fixedly installed on the top of the economizer waste heat recovery box 1. The filter cover 9 is fixedly connected to the top of the filter plate 10. The top of the filter cover 9 is fixedly connected with a smoke exhaust pipe. The inside of the filter cover 9 is rotatably connected with a second threaded rod 16 and a limit rod 14. One side of the filter cover 9 is fixedly connected with a cleaning motor 8. The output end of the cleaning motor 8 rotates through one side of the filter cover 9 and is fixedly connected to the second threaded rod 16. The inside of the filter cover 9 is slidably connected with two collecting boxes 11. The outer surface of the second threaded rod 16 is threadedly sleeved with a cleaning scraper 15. The end of the cleaning scraper 15 away from the second threaded rod 16 is slidably connected to the limit rod 14, and the cleaning scraper 15 contacts the top of the filter plate 10.

[0026] The insides of the four limiting grooves 13 near the cleaning motor 8 are all rotatably connected with the first threaded rod 5, and the outer surfaces of the four first threaded rods 5 are threadedly sleeved with cleaning brushes 12, and both ends of the four cleaning brushes 12 are slidably connected to the corresponding limiting grooves 13. The side of the economizer waste heat recovery box 1 near the water outlet pipe 4 is fixedly connected with the drive motor 7, and the output end of the drive motor 7 rotates through one side of the economizer waste heat recovery box 1 and is fixedly connected to the first threaded rod 5 near the cleaning motor 8. A synchronizer 6 is provided on the side of the economizer waste heat recovery box 1 near the drive motor 7, and two identical synchronizers 6 are provided on the side of the economizer waste heat recovery box 1 away from the drive motor 7. The four second threaded rods 16 are transmission connected through three synchronizers 6.

[0027] Furthermore, when using the device, the smoke exhaust pipe is connected to the filter cover 9, so that the smoke is discharged into the economizer waste heat recovery box 1, and the waste heat in the smoke is absorbed and utilized by the spiral fin tube 3, so that the filter plate 10 can filter and adsorb the dust contained in the smoke, and the cleaning motor 8 is started by connecting an external power supply. The cleaning motor 8 drives the second threaded rod 16 to rotate, and the rotation of the second threaded rod 16 drives the cleaning scraper 15 to move under the guidance of the limit rod 14, so that the cleaning scraper 15 can clean the top of the filter plate 10 to avoid accumulation of dust on the filter plate 10. Too much dust accumulates, thereby affecting the filtering effect of the filter plate 10, so that the cleaned dust will be discharged into the two collecting boxes 11, and the driving motor 7 is started by connecting an external power supply. The driving motor 7 drives the corresponding first threaded rod 5 to rotate, and the first threaded rod 5 close to the driving motor 7 rotates to drive the corresponding three first threaded rods 5 to rotate through three synchronizers 6. The four first threaded rods 5 rotate to drive the corresponding cleaning brushes 12 to slide under the guidance of the corresponding two limiting slide grooves 13, so as to clean the surface of the spiral fin tube 3 and prevent smoke and dust from adhering to the spiral fin tube 3.

[0028] Through the cooperation of the filter plate 10, the second threaded rod 16, the limit rod 14 and the cleaning scraper 15, the filter plate 10 will filter and absorb the dust contained in the flue gas, and the cleaning scraper 15 is convenient for cleaning the dust accumulated on the filter plate 10, thereby improving the filtering effect of the filter plate 10 after long-term use. With the cooperation of the four first threaded rods 5, the three synchronizers 6 and the four cleaning brushes 12, the four cleaning brushes 12 will clean the smoke and dust attached to the surface of the spiral fin tube 3 to prevent the smoke and dust from corroding the spiral fin tube 3, thereby further improving the service life of the spiral fin tube 3.

[0029] Through the two collecting boxes 11 set on the filter cover 9, the cleaning scraper 15 will discharge the cleaned dust into the two collecting boxes 11, so that the two collecting boxes 11 can centrally collect the cleaned dust, which is convenient for subsequent discharge and treatment, and further improves the use effect of the filtering device.

[0030] Working principle: by connecting the smoke exhaust pipe to the filter cover 9, the smoke is discharged into the economizer waste heat recovery box 1, and the waste heat in the smoke is absorbed and utilized by the spiral fin tube 3, so that the filter plate 10 will filter and adsorb the dust contained in the smoke, and the cleaning motor 8 is started by connecting the external power supply, and the cleaning motor 8 drives the second threaded rod 16 to rotate, and the second threaded rod 16 rotates to drive the cleaning scraper 15 to move under the guidance of the limit rod 14, so that the cleaning scraper 15 can clean the top of the filter plate 10 to avoid excessive accumulation on the filter plate 10. Dust will be affected, thereby affecting the filtering effect of the filter plate 10, so that the cleaned dust will be discharged into the two collecting boxes 11, and the driving motor 7 is started by connecting an external power supply. The driving motor 7 drives the corresponding first threaded rod 5 to rotate, and the first threaded rod 5 close to the driving motor 7 rotates to drive the corresponding three first threaded rods 5 to rotate through three synchronizers 6. The four first threaded rods 5 rotate to drive the corresponding cleaning brushes 12 to slide under the guidance of the corresponding two limiting slide grooves 13, so as to clean the surface of the spiral fin tube 3 and prevent smoke and dust from adhering to the spiral fin tube 3.

[0031] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A waste heat utilization device for a spiral finned tube economizer, comprising a waste heat recovery box (1) for the economizer, a spiral finned tube (3), a water inlet pipe (2) and a water outlet pipe (4), wherein the spiral finned tube (3) is fixedly installed inside the waste heat recovery box (1) for the economizer, and the water inlet pipe (2) and the water outlet pipe (4) are respectively fixedly connected to both ends of the spiral finned tube (3), characterized in that: Four limiting slide grooves (13) are provided on both sides of the inner wall of the economizer waste heat recovery box (1); Wherein, a smoke dust filtering structure is arranged on the economizer waste heat recovery box (1).

2. The waste heat utilization device of a spiral fin tube economizer according to claim 1, characterized in that: The smoke filtering structure comprises a filter plate (10) and a filter cover (9), wherein the filter plate (10) is fixedly mounted on the top of the economizer waste heat recovery box (1), and the filter cover (9) is fixedly connected to the top of the filter plate (10); The top of the filter cover (9) is fixedly connected to a smoke exhaust pipe, and the interior of the filter cover (9) is rotatably connected to a second threaded rod (16) and a limit rod (14); A cleaning motor (8) is fixedly connected to one side of the filter cover (9), an output end of the cleaning motor (8) rotates through one side of the filter cover (9) and is fixedly connected to a second threaded rod (16), and two collection boxes (11) are slidably connected inside the filter cover (9).

3. The waste heat utilization device of a spiral fin tube economizer according to claim 2, characterized in that: The outer surface of the second threaded rod (16) is threadedly sleeved with a cleaning scraper (15); one end of the cleaning scraper (15) away from the second threaded rod (16) is slidably connected to the limit rod (14); and the cleaning scraper (15) is in contact with the top of the filter plate (10).

4. The waste heat utilization device of a spiral fin tube economizer according to claim 2, characterized in that: The interiors of the four limiting slide grooves (13) close to the cleaning motor (8) are all rotatably connected to the first threaded rods (5); The outer surfaces of the four first threaded rods (5) are all threadedly sleeved with cleaning brushes (12), and both ends of the four cleaning brushes (12) are slidably connected to corresponding limiting sliding grooves (13).

5. The waste heat utilization device of a spiral fin tube economizer according to claim 4, characterized in that: A drive motor (7) is fixedly connected to one side of the economizer waste heat recovery box (1) near the water outlet pipe (4); the output end of the drive motor (7) rotates through one side of the economizer waste heat recovery box (1) and is fixedly connected to the first threaded rod (5) near the cleaning motor (8).

6. A waste heat utilization device for a spiral fin tube economizer according to claim 5, characterized in that: A synchronizer (6) is arranged on the side of the economizer waste heat recovery box (1) close to the drive motor (7), and two identical synchronizers (6) are arranged on the side of the economizer waste heat recovery box (1) away from the drive motor (7); The four second threaded rods (16) are transmission connected via three synchronizers (6).

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