Boiler heat exchanger

Abstract

The utility model discloses a boiler heat exchanger which comprises a heat exchange box, a fan, an air outlet pipe, a filter box, an ash removal mechanism, a dust collection box, a heat exchange pipe and a filter screen, the fan is installed on the upper right portion of the heat exchange box, the air outlet pipe is arranged on the lower right portion of the heat exchange box, the filter box is installed on the upper left portion of the heat exchange box, and a smoke inlet is formed in the left side of the filter box. A heat exchange pipe is installed in the heat exchange box, the upper end of the heat exchange pipe is communicated with the filter box, the lower end of the heat exchange pipe is provided with a smoke outlet extending out of the heat exchange box, a dust collection box is detachably installed at the bottom of the filter box, two filter screens are fixed in the filter box, and the bottoms of the filter screens are inserted into the dust collection box. And an ash cleaning mechanism for cleaning the two filter screens is mounted on the filter box. According to the utility model, heat in high-temperature flue gas exhausted by the boiler is convenient to recycle; smoke dust in the smoke can be conveniently filtered and cleaned, and the filter screen is not prone to being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a boiler heat exchanger. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler includes chemical energy and electrical energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and people's lives, and can also be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator.

[0003] When the boiler is running, it will discharge a large amount of high-temperature flue gas. In order to recycle the heat in the flue gas, a heat exchanger will be used to recycle the heat in the flue gas. Since the flue gas contains a lot of smoke dust, the heat exchanger is generally equipped with a filter to filter out the smoke dust. However, the filter of the existing heat exchanger must be manually removed and cleaned after a period of use, otherwise it is easy to be blocked by smoke dust, which is inconvenient. Therefore, in view of the above situation, it is urgent to develop a boiler heat exchanger that is easy to filter and clean the smoke dust in the flue gas and is not easy to block the filter, so as to overcome the shortcomings in current practical applications and meet current needs. Utility Model Content

[0004] The purpose of the utility model is to provide a boiler heat exchanger to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A boiler heat exchanger comprises a heat exchange box, a fan, an air outlet pipe, a filter box, a dust cleaning mechanism, a dust collecting box, a heat exchange tube and a filter screen, wherein a fan is installed at the upper right of the heat exchange box, an air outlet pipe is arranged at the lower right of the heat exchange box, a filter box is installed at the upper left of the heat exchange box, a flue gas inlet is arranged on the left side of the filter box, a heat exchange tube is installed in the heat exchange box, the upper end of the heat exchange tube is connected with the filter box, a flue gas outlet extending to the outside of the heat exchange box is arranged at the lower end of the heat exchange tube, a dust collecting box is detachably installed at the bottom of the filter box, and two A filter screen, the bottom of the filter screen is inserted in the dust collection box, and a cleaning mechanism for cleaning the two filter screens is installed on the filter box, and the cleaning mechanism includes: a bracket, a drive motor, a screw, a threaded sleeve, a guide rod and a scraper, the bracket is fixed to the top of the filter box, the screw is rotatably connected to the top of the filter box, the drive motor is fixed to the top of the bracket, the output shaft of the drive motor is connected to the screw, and a threaded sleeve is installed on the screw, and a guide rod extending into the filter box is fixed on the left and right sides of the threaded sleeve, and a scraper is fixed at the bottom of each guide rod.

[0007] As a further solution of the utility model: the heat exchange tube is made of copper.

[0008] As a further solution of the utility model: the guide rod is slidably connected to the filter box.

[0009] As a further solution of the utility model: each scraper is fitted with the front end surface of a filter screen.

[0010] As a further solution of the utility model: a plurality of guide fins are fixed on both the left and right sides of the interior of the heat exchange box.

[0011] Beneficial effect: When the boiler heat exchanger is used, the high-temperature flue gas of the boiler is transported from the flue gas inlet to the filter box, and the smoke dust in the flue gas is filtered out through the filter net. Then, the flue gas enters the heat exchange tube, and the normal temperature airflow is blown into the heat exchange box through the fan. The airflow flows downward along multiple guide fins, so that the air and the heat exchange tube are in more complete contact. When the normal temperature airflow contacts the heat exchange tube, it is heated by the high-temperature flue gas in the heat exchange tube. The heated air is discharged from the air outlet pipe, and the high-temperature air is transported to the boiler for use. After a period of use, the lead screw is driven by the driving motor to rotate, and the threaded sleeve, guide rod and scraper are driven downward by the rotation of the lead screw. The scraper scrapes off the smoke dust on the filter net, so that the smoke dust falls into the dust box and is collected, thereby preventing the filter net from being blocked. In summary, the utility model is convenient for recycling the heat in the high-temperature flue gas discharged from the boiler; it is convenient for filtering and cleaning the smoke dust in the flue gas, and it is not easy to block the filter net. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 .

[0013] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 .

[0014] Figure 3 This is an internal cross-sectional view of the heat exchange box in the present invention.

[0015] Figure 4 It is a partial structure diagram of the utility model Figure 1 .

[0016] Figure 5 This is an internal cross-sectional view of the filter box in the utility model.

[0017] Figure 6 It is a partial structure diagram of the utility model Figure 2 .

[0018] In the figure: 1. heat exchange box; 101. guide fin; 2. fan; 3. air outlet duct; 4. filter box; 401. flue gas inlet; 5. dust cleaning mechanism; 501. bracket; 502. drive motor; 503. lead screw; 504. threaded sleeve; 505. guide rod; 506. scraper; 6. dust collection box; 7. heat exchange tube; 701. flue gas outlet; 8. filter. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0020] Example

[0021] See also Figures 1 to 6 In an embodiment of the utility model, a boiler heat exchanger comprises a heat exchange box 1, a fan 2, an air outlet pipe 3, a filter box 4, a dust cleaning mechanism 5, a dust collecting box 6, a heat exchange tube 7 and a filter screen 8. A fan 2 is installed at the upper right of the heat exchange box 1, and a normal temperature airflow is blown into the heat exchange box 1 through the fan 2. An air outlet pipe 3 is arranged at the lower right of the heat exchange box 1. A filter box 4 is installed at the upper left of the heat exchange box 1. A flue gas inlet 401 is arranged on the left side of the filter box 4, and the flue gas inlet 401 is connected to the exhaust pipe of the boiler. A heat exchange tube 7 is installed in the heat exchange box 1, and the upper end of the heat exchange tube 7 is connected to the filter box 4. The heat exchange tube 7 is made of copper to have good thermal conductivity. A flue gas outlet 701 extending to the outside of the heat exchange box 1 is arranged at the lower end of the heat exchange tube 7. A dust collecting box 6 is detachably installed at the bottom of the filter box 4. Two filters 8 are fixed inside, and the bottom of the filter 8 is inserted into the dust collecting box 6. A cleaning mechanism 5 for cleaning the two filters 8 is installed on the filter box 4. Multiple guide fins 101 are fixed on the left and right sides of the interior of the heat exchange box 1. When in use, the high-temperature flue gas of the boiler is transported to the filter box 4 from the flue gas inlet 401, and the smoke in the smoke is filtered out by the filter 8. Then, the smoke enters the heat exchange tube 7, and the normal temperature airflow is blown into the heat exchange box 1 through the fan 2. The airflow flows downward along the multiple guide fins 101, so that the contact between the air and the heat exchange tube 7 is more complete. When the normal temperature airflow contacts the heat exchange tube 7, it is heated by the high temperature flue gas in the heat exchange tube 7. The heated air is discharged from the air outlet pipe 3, and the high temperature air is then transported to the boiler for use. After a period of use, the smoke accumulated on the filter 8 can be cleaned off by the cleaning mechanism 5.

[0022] The dust cleaning mechanism 5 includes: a bracket 501, a driving motor 502, a lead screw 503, a threaded sleeve 504, a guide rod 505 and a scraper 506. The bracket 501 is fixed to the top of the filter box 4, the lead screw 503 is rotatably connected to the top of the filter box 4, the driving motor 502 is fixed to the top of the bracket 501, the output shaft of the driving motor 502 is connected to the lead screw 503, the lead screw 503 is installed with a threaded sleeve 504, and a guide rod 505 extending into the filter box 4 is fixed on both sides of the threaded sleeve 504. The guide rod 505 is connected to the filter box 4 is connected by sliding, and the movement of the threaded sleeve 504 is restricted by the guide rod 505 so that it cannot rotate but can only move linearly. A scraper 506 is fixed at the bottom of each guide rod 505, and each scraper 506 is in contact with the front end surface of a filter screen 8. When in use, the lead screw 503 is driven to rotate by the driving motor 502, and the threaded sleeve 504, the guide rod 505 and the scraper 506 are driven to move downward by the rotation of the lead screw 503, and the dust on the filter screen 8 is scraped off by the scraper 506, so that the dust falls into the dust box 6 and is collected, thereby preventing the filter screen 8 from being blocked.

[0023] The working principle of the utility model is as follows: when the boiler heat exchanger is in use, the high-temperature flue gas of the boiler is transported from the flue gas inlet 401 to the filter box 4, and the smoke dust in the flue gas is filtered out by the filter screen 8. Then, the flue gas enters the heat exchange tube 7, and the normal-temperature airflow is blown into the heat exchange box 1 through the fan 2. The airflow flows downward along the multiple guide fins 101, so that the contact between the air and the heat exchange tube 7 is more complete. When the normal-temperature airflow contacts the heat exchange tube 7, it is heated by the high-temperature flue gas in the heat exchange tube 7. The heated air is discharged from the air outlet pipe 3, and the high-temperature air is transported to the boiler for use. After a period of use, the lead screw 503 is driven to rotate by the driving motor 502, and the threaded sleeve 504, the guide rod 505 and the scraper 506 are driven downward by the rotation of the lead screw 503. The smoke dust on the filter screen 8 is scraped off by the scraper 506, so that the smoke dust falls into the dust collecting box 6 and is collected, thereby preventing the filter screen 8 from being blocked.

Claims

1. A boiler heat exchanger, characterized in that: The invention comprises a heat exchange box (1), a fan (2), an air outlet pipe (3), a filter box (4), a dust cleaning mechanism (5), a dust collecting box (6), a heat exchange pipe (7) and a filter screen (8), wherein the fan (2) is installed at the upper right of the heat exchange box (1), the air outlet pipe (3) is arranged at the lower right of the heat exchange box (1), the filter box (4) is installed at the upper left of the heat exchange box (1), a smoke inlet (401) is arranged on the left side of the filter box (4), a heat exchange pipe (7) is installed in the heat exchange box (1), the upper end of the heat exchange pipe (7) is connected to the filter box (4), the lower end of the heat exchange pipe (7) is provided with a smoke outlet (701) extending to the outside of the heat exchange box (1), the dust collecting box (6) is detachably installed at the bottom of the filter box (4), two filter screens (8) are fixed in the filter box (4), and the bottom of the filter screen (8) is inserted in the dust collecting box (1). In the box (6), a cleaning mechanism (5) for cleaning two filter screens (8) is installed on the filter box (4), and the cleaning mechanism (5) includes: a bracket (501), a drive motor (502), a lead screw (503), a threaded sleeve (504), a guide rod (505) and a scraper (506). The bracket (501) is fixed to the top of the filter box (4), and the lead screw (503) is rotatably connected to the top of the filter box (4). The drive motor (502) is fixed to the top of the bracket (501), and the output shaft of the drive motor (502) is connected to the lead screw (503). The lead screw (503) is installed with a threaded sleeve (504), and a guide rod (505) extending into the filter box (4) is fixed on both sides of the left and right sides of the threaded sleeve (504), and a scraper (506) is fixed to the bottom of each guide rod (505).

2. The boiler heat exchanger according to claim 1, characterized in that: The heat exchange tube (7) is made of copper.

3. The boiler heat exchanger according to claim 1, characterized in that: The guide rod (505) is slidably connected to the filter box (4).

4. The boiler heat exchanger according to claim 1, characterized in that: Each of the scrapers (506) fits against the front end surface of a filter screen (8).

5. The boiler heat exchanger according to claim 1, characterized in that: A plurality of guide fins (101) are fixed on both left and right sides of the interior of the heat exchange box (1).

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