Sewage water circulation heat exchange device of power plant boiler

Abstract

The utility model relates to the technical field of heat exchange devices, in particular to a blow-down water circulation heat exchange device of a power plant boiler, which comprises a heat exchange box and a heat exchange pipe arranged in the middle of the heat exchange box, a first vertical pipe is arranged at the top of the heat exchange box and communicated with the end of the heat exchange pipe, and a second vertical pipe is arranged at the bottom of the heat exchange box. A filtering part communicated with the heat exchange box is arranged at one end of the heat exchange box, the filtering part and the heat exchange box are both cylinders, a filtering net is fixedly installed in the filtering part, a second vertical pipe is arranged at the top of the filtering part, a third vertical pipe is arranged at the bottom of the heat exchange box, and a first scraping ring is arranged on the heat exchange pipe in a sliding mode; according to the blow-down water circulation heat exchange device of the power plant boiler, impurities adhering to the outer wall of the heat exchange pipe and the inner wall of the heat exchange box can be scraped away, high efficiency and stability of heat exchange are guaranteed, and practicability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange devices, and in particular relates to a wastewater circulation heat exchange device for a power plant boiler. Background Art

[0002] The wastewater circulation heat exchange device of the power plant boiler is a device that efficiently utilizes the thermal energy of the boiler wastewater. It recovers the heat energy in the wastewater through heat exchange technology and uses it for other processes or heating systems. It not only realizes the recycling of energy, but also reduces environmental pollution. It is one of the important means of energy conservation and emission reduction in power plants.

[0003] In the existing power plant boiler wastewater circulation heat exchange device, due to long-term operation and complex working conditions, various impurities are easily adhered to the outer wall of the heat exchange tube and the inner wall of the heat exchange box, and the accumulation of these impurities is difficult to be effectively cleaned, resulting in a gradual decrease in heat exchange efficiency and unstable heat exchange effect, which not only increases energy consumption and production costs, but also may cause equipment failure. Improvements are needed. For this purpose, a power plant boiler wastewater circulation heat exchange device is proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sewage circulation heat exchange device for a power plant boiler which can scrape off impurities adhered to the outer wall of a heat exchange tube and the inner wall of a heat exchange box to ensure high efficiency and stability of heat exchange and has strong practicality.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wastewater circulation heat exchange device for a power plant boiler, comprising a heat exchange box and a heat exchange tube arranged in the middle of the heat exchange box, a vertical pipe 1 is arranged on the top of the heat exchange box, and the vertical pipe 1 is connected to the end of the heat exchange tube, a filter part connected thereto is arranged at one end of the heat exchange box, the filter part and the heat exchange box are both arranged as cylinders, a filter screen is fixedly installed in the filter part, a vertical pipe 2 is arranged on the top of the filter part, and a vertical pipe 3 is arranged at the bottom of the heat exchange box, a scraper ring 1 is slidably arranged on the heat exchange tube, a scraper ring 2 is slidably arranged on the inner wall of the heat exchange box, the scraper ring 1 and the scraper ring 2 are connected by evenly distributed vertical rods, and a driving mechanism for driving the scraper ring 1 and the scraper ring 2 to move horizontally is arranged on the heat exchange box and the filter part.

[0006] Preferably, the driving mechanism includes a screw rod rotatably arranged on the side of the heat exchange box, a movable block threadedly connected to the screw rod, a movable ring slidably arranged on the heat exchange box, and a driving member arranged on the filter part.

[0007] Preferably, the driving member includes a double-headed motor fixedly mounted on the filter portion, a driving wheel fixedly mounted on one end of the output shaft of the double-headed motor, a driven wheel rotatably arranged on the side of the filter portion, a belt sleeved on the driving wheel and the driven wheel, and a connecting rod rotatably arranged on the side of the filter portion.

[0008] Preferably, the movable block is fixedly installed on the side of the movable ring, the movable ring is set to a magnetic material, the scraper ring is set to a magnetic metal material, and the scraper ring is opposite to the movable ring, the belt is respectively connected to the driving wheel and the driven wheel, and the two ends of the connecting rod are respectively fixedly installed on the middle of the driven wheel and the end of the screw rod.

[0009] Preferably, a rotating rod is rotatably arranged in the filter part, and movable rods evenly distributed are fixedly mounted on the rotating rod. A scraper strip is slidably mounted on one end of the movable rod close to the inner wall of the filter part, and the end of the rotating rod is fixedly mounted to one end of the output shaft of the double-headed motor.

[0010] Preferably, a rubber strip is laid on the side of the movable rod close to the filter screen and the side of the scraper bar close to the filter part, and the rubber strip is respectively in contact with the filter screen and the inner wall of the filter part.

[0011] Preferably, a collecting box is provided at the bottom of the filter part, a sealing plate is slidably provided on the collecting box, electric push rods are fixedly installed on both sides of the collecting box, and the ends of the output shafts of the electric push rods are respectively fixedly installed on the sides of the sealing plate.

[0012] In summary, compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. In the utility model, by arranging the heat exchange box, the heat exchange tube, the vertical tube 1, the filter part, the filter screen, the vertical tube 2, the vertical tube 3, the scraper ring 1, the scraper ring 2, the vertical rod and the driving mechanism, the impurities adhered to the outer wall of the heat exchange tube and the inner wall of the heat exchange box can be scraped off, so as to ensure the high efficiency and stability of heat exchange and strong practicality.

[0014] 2. In the utility model, by setting the cooperation between the rotating rod, the movable rod, the scraping strip, the rubber strip, the collecting box, the sealing plate and the electric push rod, the impurities on the outer wall of the heat exchange tube and the inner wall of the heat exchange box can be cleaned, and the impurities adhered to the surface of the filter and the inner wall of the filter part can be scraped off, thereby ensuring the high efficiency and stability of the filtration and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a side structural diagram of the utility model;

[0017] Figure 3This is a structural diagram of a heat exchange box, a heat exchange tube, a scraper ring 1 and a scraper ring 2 of the utility model;

[0018] Figure 4 This is a structural diagram of the filter unit of the utility model;

[0019] Figure 5 It is a side cross-sectional structural diagram of the filter part of the utility model.

[0020] Legend:

[0021] 1. Heat exchange box; 2. Heat exchange tube; 3. Vertical pipe 1; 4. Filter part; 5. Filter screen; 6. Vertical pipe 2; 7. Vertical pipe 3; 8. Scraper ring 1; 9. Scraper ring 2; 10. Vertical rod; 11. Driving mechanism; 111. Screw rod; 112. Movable block; 113. Movable ring; 114. Driving part; 1141. Double-headed motor; 1142. Driving wheel; 1143. Driven wheel; 1144. Belt; 1145. Connecting rod; 12. Rotating rod; 13. Movable rod; 14. Scraper strip; 15. Collecting box; 16. Sealing plate; 17. Electric push rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 , the utility model provides a technical solution:

[0024] A wastewater circulation heat exchange device for a power plant boiler comprises a heat exchange box 1 and a heat exchange tube 2 arranged in the middle of the heat exchange box 1, a vertical pipe 3 is arranged on the top of the heat exchange box 1, the vertical pipe 3 is connected to the end of the heat exchange tube 2, a filter part 4 connected thereto is arranged at one end of the heat exchange box 1, the filter part 4 and the heat exchange box 1 are both arranged as cylinders, a filter screen 5 is fixedly installed in the filter part 4, a vertical pipe 2 6 is arranged on the top of the filter part 4, a vertical pipe 3 7 is arranged at the bottom of the heat exchange box 1, a scraper ring 1 8 is slidably arranged on the heat exchange tube 2, a scraper ring 2 9 is slidably arranged on the inner wall of the heat exchange box 1, the scraper ring 1 8 is connected to the scraper ring 2 9 by evenly distributed vertical rods 10, a driving mechanism 11 for driving the scraper ring 1 8 and the scraper ring 2 9 to move horizontally is arranged on the heat exchange box 1 and the filter part 4, the driving mechanism 11 comprises a screw rod 111 rotatably arranged on the side of the heat exchange box 1, and an active screw threadedly connected to the screw rod 111. A movable block 112, a movable ring 113 slidably arranged on the heat exchange box 1, and a driving member 114 arranged on the filter part 4, the driving member 114 includes a double-headed motor 1141 fixedly installed on the filter part 4, a driving wheel 1142 fixedly installed at one end of the output shaft of the double-headed motor 1141, a driven wheel 1143 rotatably arranged on the side of the filter part 4, a belt 1144 sleeved on the driving wheel 1142 and the driven wheel 1143, and a connecting rod 1145 rotatably arranged on the side of the filter part 4, the movable block 112 is fixedly installed on the side of the movable ring 113, the movable ring 113 is set to a magnetic material, the scraper ring 18 is set to a magnetic metal material, and the scraper ring 18 is opposite to the movable ring 113, the belt 1144 is respectively connected to the driving wheel 1142 and the driven wheel 1143, and the two ends of the connecting rod 1145 are respectively fixedly installed on the middle part of the driven wheel 1143 and the end of the screw rod 111.

[0025] In the process of circulating heat exchange of wastewater from the power plant boiler, the vertical pipe 1 3 introduces the hot water into the heat exchange tube 2, and the vertical pipe 2 6 allows the sewage to enter the filter part 4, and then flows into the heat exchange box 1 after being filtered by the filter screen 5. The hot water in the heat exchange tube 2 will exchange heat with the sewage. As the running time increases, impurities will adhere to the outer wall of the heat exchange tube 2 and the inner wall of the heat exchange box 1. At this time, the double-headed motor 1141 on the filter part 4 is started, and its output shaft drives the driving wheel 1142 to rotate, and drives the driven wheel 1143 to rotate through the belt 1144. The connecting rod 1145 in the middle of the driven wheel 1143 drives the screw rod 111 to rotate, so that the movable block 112 threadedly connected to the screw rod 111 moves horizontally, and the movable block 112 moves horizontally with the movable block 112. The fixed movable ring 113 moves accordingly. Since the movable ring 113 is made of magnetic material, and the scraper ring 18 is made of magnetic metal material and is directly opposite to the movable ring 113, the movement of the movable ring 113 will drive the scraper ring 18 to slide horizontally. The scraper ring 18 is connected to the scraper ring 29 through the evenly distributed vertical rods 10, so that the scraper ring 29 also slides on the outer wall of the heat exchange tube 2. In this way, the scraper ring 18 scrapes off the impurities on the outer wall of the heat exchange tube 2, and the scraper ring 29 scrapes off the impurities on the inner wall of the heat exchange box 1. The sewage treated by heat exchange is discharged from the vertical pipe 3 7. The sewage circulation heat exchange device of the power plant boiler can scrape off the impurities adhered to the outer wall of the heat exchange tube 2 and the inner wall of the heat exchange box 1, thereby ensuring the high efficiency and stability of heat exchange and strong practicality.

[0026] A rotating rod 12 is rotatably arranged in the filter part 4, and an evenly distributed movable rod 13 is fixedly installed on the rotating rod 12. A scraper strip 14 is slidably installed on one end of the movable rod 13 close to the inner wall of the filter part 4. The end of the rotating rod 12 is fixedly installed with one end of the output shaft of the double-headed motor 1141. The movable rod 13 is close to the filter screen 5, and the scraper strip 14 is close to the filter part 4. The rubber strip is laid with the filter screen 5 and the inner wall of the filter part 4 respectively. A collecting box 15 is arranged at the bottom of the filter part 4, and a sealing plate 16 is slidably arranged on the collecting box 15. Electric push rods 17 are fixedly installed on both sides of the collecting box 15, and the ends of the output shafts of the electric push rods 17 are fixedly installed with the sides of the sealing plate 16 respectively.

[0027] While cleaning the outer wall of the heat exchange tube 2 and the inner wall of the filter section 4, the output shaft of the double-headed motor 1141 drives the rotating rod 12 to rotate in the filter section 4, and the evenly distributed movable rods 13 and scraper strips 14 fixed on the rotating rod 12 rotate accordingly. The rubber strips laid on the side of the movable rod 13 close to the filter screen 5 and the side of the scraper strips 14 close to the filter section 4 are respectively fitted with the filter screen 5 and the inner wall of the filter section 4. When the movable rod 13 and the scraper strips 14 rotate, the impurities adhering to the surface of the filter screen 5 and the inner wall of the filter section 4 are automatically scraped off, and the scraped impurities fall into the collection box 15 at the bottom. When the collection box 15 needs to be cleaned, the electric push rod 17 is started, and the output shaft of the electric push rod 17 pushes the sealing plate 16 to slide, and the collection box 15 is opened to process the impurities. While cleaning the outer wall of the heat exchange tube 2 and the inner wall of the heat exchange box 1, the impurities adhering to the surface of the filter screen 5 and the inner wall of the filter section 4 can be scraped off, thereby ensuring high efficiency and stability of filtration.

[0028] Working principle:

[0029] In the process of circulating heat exchange of wastewater from the power plant boiler, the vertical pipe 1 3 introduces the hot water into the heat exchange tube 2, and the vertical pipe 2 6 allows the sewage to enter the filter part 4, and then flows into the heat exchange box 1 after being filtered by the filter screen 5. The hot water in the heat exchange tube 2 will exchange heat with the sewage. As the running time increases, impurities will adhere to the outer wall of the heat exchange tube 2 and the inner wall of the heat exchange box 1. At this time, the double-headed motor 1141 on the filter part 4 is started, and its output shaft drives the driving wheel 1142 to rotate, and drives the driven wheel 1143 to rotate through the belt 1144. The connecting rod 1145 in the middle of the driven wheel 1143 drives the screw rod 111 to rotate, so that the movable block 112 threadedly connected to the screw rod 111 moves horizontally, and the movable block 112 moves horizontally with the movable block 112. The fixed movable ring 113 moves accordingly. Since the movable ring 113 is made of magnetic material, and the scraper ring 18 is made of magnetic metal material and is directly opposite to the movable ring 113, the movement of the movable ring 113 will drive the scraper ring 18 to slide horizontally. The scraper ring 18 is connected to the scraper ring 29 through the evenly distributed vertical rods 10, so that the scraper ring 29 also slides on the outer wall of the heat exchange tube 2. In this way, the scraper ring 18 scrapes off the impurities on the outer wall of the heat exchange tube 2, and the scraper ring 29 scrapes off the impurities on the inner wall of the heat exchange box 1. The wastewater treated by heat exchange is discharged from the vertical pipe 3 7. The wastewater circulation heat exchange device of the power plant boiler can scrape off the impurities adhered to the outer wall of the heat exchange tube 2 and the inner wall of the heat exchange box 1, thereby ensuring the high efficiency and stability of heat exchange and having strong practicality.

[0030] While cleaning the outer wall of the heat exchange tube 2 and the inner wall of the filter section 4, the output shaft of the double-headed motor 1141 drives the rotating rod 12 to rotate in the filter section 4, and the evenly distributed movable rods 13 and scraper strips 14 fixed on the rotating rod 12 rotate accordingly. The rubber strips laid on the side of the movable rod 13 close to the filter screen 5 and the side of the scraper strips 14 close to the filter section 4 are respectively fitted with the filter screen 5 and the inner wall of the filter section 4. When the movable rod 13 and the scraper strips 14 rotate, the impurities adhering to the surface of the filter screen 5 and the inner wall of the filter section 4 are automatically scraped off, and the scraped impurities fall into the collection box 15 at the bottom. When the collection box 15 needs to be cleaned, the electric push rod 17 is started, and the output shaft of the electric push rod 17 pushes the sealing plate 16 to slide, and the collection box 15 is opened to process the impurities. While cleaning the outer wall of the heat exchange tube 2 and the inner wall of the heat exchange box 1, the impurities adhering to the surface of the filter screen 5 and the inner wall of the filter section 4 can be scraped off, thereby ensuring high efficiency and stability of filtration.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wastewater circulation heat exchange device for a power plant boiler, comprising a heat exchange box (1) and a heat exchange tube (2) arranged in the middle of the heat exchange box (1), characterized in that: A vertical pipe (3) is arranged on the top of the heat exchange box (1), and the vertical pipe (3) is connected to the end of the heat exchange tube (2). A filter (4) is arranged at one end of the heat exchange box (1) and is connected thereto. The filter (4) and the heat exchange box (1) are both arranged as cylinders. A filter screen (5) is fixedly installed in the filter (4). A vertical pipe (6) is arranged on the top of the filter (4). A vertical pipe (7) is arranged on the bottom of the heat exchange box (1). A scraper ring (8) is slidably arranged on the heat exchange tube (2). A scraper ring (9) is slidably arranged on the inner wall of the heat exchange box (1). The scraper ring (8) and the scraper ring (9) are connected by evenly distributed vertical rods (10). A driving mechanism (11) for driving the scraper ring (8) and the scraper ring (9) to move horizontally is arranged on the heat exchange box (1) and the filter (4).

2. The wastewater circulation heat exchange device for a power plant boiler according to claim 1, characterized in that: The driving mechanism (11) comprises a screw rod (111) rotatably arranged on the side of the heat exchange box (1), a movable block (112) threadedly connected to the screw rod (111), a movable ring (113) slidably arranged on the heat exchange box (1), and a driving member (114) arranged on the filter part (4).

3. The wastewater circulation heat exchange device for a power plant boiler according to claim 2, characterized in that: The driving member (114) comprises a double-headed motor (1141) fixedly mounted on the filter portion (4), a driving wheel (1142) fixedly mounted on one end of the output shaft of the double-headed motor (1141), a driven wheel (1143) rotatably arranged on the side of the filter portion (4), a belt (1144) sleeved on the driving wheel (1142) and the driven wheel (1143), and a connecting rod (1145) rotatably arranged on the side of the filter portion (4).

4. The wastewater circulation heat exchange device for a power plant boiler according to claim 3, characterized in that: The movable block (112) is fixedly mounted on the side of the movable ring (113); the movable ring (113) is made of a magnetic material; the scraper ring (8) is made of a magnetic metal material, and the scraper ring (8) is directly opposite to the movable ring (113); the belt (1144) is respectively connected to the driving wheel (1142) and the driven wheel (1143); and the two ends of the connecting rod (1145) are respectively fixedly mounted on the middle of the driven wheel (1143) and the end of the screw rod (111).

5. The wastewater circulation heat exchange device for a power plant boiler according to claim 1, characterized in that: A rotating rod (12) is rotatably arranged inside the filter portion (4), and evenly distributed movable rods (13) are fixedly mounted on the rotating rod (12). A scraper strip (14) is slidably mounted on one end of the movable rod (13) close to the inner wall of the filter portion (4), and the end of the rotating rod (12) is fixedly mounted on one end of the output shaft of the double-headed motor (1141).

6. The wastewater circulation heat exchange device for a power plant boiler according to claim 5, characterized in that: The movable rod (13) is provided with a rubber strip on one side close to the filter screen (5), and the scraper strip (14) is provided with a rubber strip on one side close to the filter portion (4). The rubber strip is respectively fitted with the filter screen (5) and the inner wall of the filter portion (4).

7. The wastewater circulation heat exchange device for a power plant boiler according to claim 1, characterized in that: A collecting box (15) is arranged at the bottom of the filtering part (4), a sealing plate (16) is slidably arranged on the collecting box (15), electric push rods (17) are fixedly installed on both sides of the collecting box (15), and the output shaft ends of the electric push rods (17) are respectively fixedly installed on the sides of the sealing plate (16).

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