Boiler flue gas waste heat recovery device

Abstract

The utility model discloses a boiler flue gas waste heat recovery device which comprises a first water storage tank and a second water storage tank, heating pipes are fixedly installed in the first water storage tank and the second water storage tank, and air inlet pipes are fixedly installed on the side portion of the first water storage tank and the side portion of the second water storage tank. Through the structural design of the first water storage tank, the second water storage tank, the first electromagnetic valve, the second electromagnetic valve and the like, smoke can be controlled to enter the first water storage tank and the second water storage tank by controlling opening or closing of the first electromagnetic valve and the second electromagnetic valve, and the situation that when heated water is discharged by the water storage tanks, the smoke enters the first water storage tank and the second water storage tank is avoided. According to the boiler flue gas waste heat recovery device, the problems that when hot water in a heat exchanger is discharged, a large amount of boiler waste heat waste gas still enters the heat exchanger to conduct heat conversion, energy is wasted, and energy resources are wasted are solved. Therefore, the energy utilization rate of the boiler is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recovery equipment, in particular to a boiler flue gas waste heat recovery device. Background Art

[0002] Boiler flue gas waste heat recovery is a technology that uses the high-temperature waste heat in the flue gas generated by boiler combustion to recover energy. By installing a waste heat recovery device, the heat energy in the flue gas can be converted into other forms of energy or directly used for heating water or steam and other processes. Common flue gas waste heat recovery methods are flue gas waste heat boilers. Flue gas waste heat boilers directly convert waste heat in flue gas into steam or hot water, which is supplied to other equipment or processes.

[0003] In the prior art, Chinese patent application number: CN202220113467.7 discloses a boiler flue gas waste heat recovery device, including a heat exchange box, a mounting hole one is provided on one side of the heat exchange box, a guide pipe one is fixedly installed on the inner side wall of the mounting hole one, a filter device is fixedly installed on one end of the guide pipe one, a connecting pipe is fixedly installed on the other end of the guide pipe one, a heat exchange pipe...filter net and a brush are fixedly installed on one end of the connecting pipe, the filter box is fixedly installed on the guide pipe one, a mounting hole two is provided on one side of the filter box, a connecting pipe is fixedly installed on the inner side wall of the mounting hole two, and a connecting flange is fixedly installed on one end of the connecting pipe.

[0004] During actual use of the above-mentioned boiler flue gas waste heat recovery device, it was found that the water in the heat exchanger needs to be discharged when it reaches the boiling point. However, in the process of the boiling water being discharged from the heat exchanger, a large amount of boiler waste heat exhaust gas will still enter the heat exchanger for heat conversion. At this time, the exhaust gas entering the heat exchanger cannot be recycled for heat utilization, resulting in energy waste and reducing the thermal efficiency of waste heat recovery. Therefore, we need to propose a boiler flue gas waste heat recovery device. Utility Model Content

[0005] The purpose of the utility model is to provide a boiler flue gas waste heat recovery device, which solves the problem that when the hot water in the heat exchanger is discharged, a large amount of boiler waste heat exhaust gas still enters the heat exchanger for heat conversion, causing energy waste, thereby improving the energy utilization rate of the boiler, reducing energy consumption, and solving the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A boiler flue gas waste heat recovery device comprises a first water tank and a second water tank, wherein heating pipes are fixedly installed in the first water tank and the second water tank, an air intake pipe is fixedly installed on the sides of the first water tank and the second water tank, the first water tank and the second water tank are connected through the air intake pipe, a transport pipe is connected to the air intake pipe, a first solenoid valve and a second solenoid valve are arranged on the air intake pipe, two ends of the air intake pipe are respectively connected to one end of the heating pipe in the first water tank and the second water tank, a guide pipe is fixedly installed on the sides of the first water tank and the second water tank, two ends of the guide pipe are respectively connected to the inside of the first water tank and the second water tank, and two ends of the guide pipe are respectively connected to one end of the heating pipe in the first water tank and the second water tank.

[0008] Preferably, a dust removal box is fixedly installed on the side of the first water storage tank, and the side of the dust removal box is connected to a connecting pipe, and the end of the connecting pipe is connected to the guide pipe.

[0009] Preferably, an isolation plate is fixedly installed in the dust removal box, and the dust removal box is divided into a dust removal chamber and an odor removal chamber by the isolation plate. A through hole for smoke to pass through is provided on the isolation plate.

[0010] Preferably, a spray mechanism is fixedly installed on the top of the dust removal chamber, a filter is fixedly installed in the dust removal chamber, the filter is inclined, and a deodorizing box is fixedly installed in the deodorizing chamber.

[0011] Preferably, the spray mechanism comprises a water inlet pipe and a spray head, wherein the water inlet pipe is fixedly mounted on the inner top of the dust removal chamber, and the spray head is connected to the water inlet pipe.

[0012] Preferably, a water pump is fixedly installed on the top of the dust removal box, the water outlet of the water pump is connected to a water pipe, and one end of the water pipe is connected to a water inlet pipe.

[0013] Preferably, a fixing plate is fixedly installed on the side of the dust removal box, a blower is fixedly installed on the top of the fixing plate, the air inlet of the blower is connected to the odor purification chamber, a collecting box is sealed at the bottom of the dust removal box, and a through hole is opened at the bottom of the dust removal box.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] Through the structural design of the first water tank, the second water tank, the first solenoid valve and the second solenoid valve, the flue gas can be controlled to enter the first water tank and the second water tank by controlling the opening or closing of the first solenoid valve and the second solenoid valve, thereby avoiding the situation that when the water tank discharges the heated water, the flue gas continues to enter the water tank and cannot transfer excess heat to the water, causing energy waste. The practical boiler flue gas waste heat recovery device solves the problem that when the hot water in the heat exchanger is discharged, a large amount of boiler waste heat exhaust gas still enters the heat exchanger for heat conversion, causing energy waste, thereby improving the energy utilization rate of the boiler, reducing the production cost of the enterprise, and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the structural schematic diagrams of the utility model;

[0017] Figure 2 This is the second structural diagram of the utility model;

[0018] Figure 3 This is the third structural diagram of the utility model;

[0019] Figure 4 This is one of the schematic diagrams of the structural disassembly of the utility model;

[0020] Figure 5 This is the second schematic diagram of the structural disassembly of the utility model;

[0021] Figure 6 It is a schematic diagram of the enlarged structure of area A in 5 of the utility model.

[0022] In the figure: 1. first water tank; 2. second water tank; 3. air inlet pipe; 4. first solenoid valve; 5. second solenoid valve; 6. heating pipe; 7. flow guide pipe; 8. dust removal chamber; 9. odor removal chamber; 10. connecting pipe; 11. dust removal box; 12. water pump; 13. filter screen; 14. isolation plate; 15. odor removal box; 16. water pipe; 17. collection box; 18. blower; 19. fixing plate; 20. spray mechanism; 201. water inlet pipe; 202. nozzle; 21. transport pipe. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-6 , the utility model provides a technical solution:

[0025] A boiler flue gas waste heat recovery device comprises a first water tank 1 and a second water tank 2, wherein a heating pipe 6 is fixedly installed in the first water tank 1 and the second water tank 2, an air intake pipe 3 is fixedly installed on the sides of the first water tank 1 and the second water tank 2, the first water tank 1 and the second water tank 2 are connected through the air intake pipe 3, a transport pipe 21 is connected to the air intake pipe 3, a first solenoid valve 4 and a second solenoid valve 5 are arranged on the air intake pipe 3, both ends of the air intake pipe 3 are respectively connected to one end of the heating pipe 6 in the first water tank 1 and the second water tank 2, a guide pipe 7 is fixedly installed on the sides of the first water tank 1 and the second water tank 2, both ends of the guide pipe 7 are respectively connected to the inside of the first water tank 1 and the second water tank 2, and both ends of the guide pipe 7 are respectively connected to one end of the heating pipe 6 in the first water tank 1 and the second water tank 2.

[0026] A dust removal box 11 is fixedly installed on the side of the first water storage tank 1, and a connecting pipe 10 is connected to the side of the dust removal box 11. The end of the connecting pipe 10 is connected to the guide pipe 7. The connecting pipe 10 is provided to connect the guide pipe 7 and the dust removal box 11;

[0027] An isolation plate 14 is fixedly installed in the dust removal box 11, and the dust removal box 11 is divided into a dust removal chamber 8 and a deodorization chamber 9 by the isolation plate 14. A through hole for smoke to pass through is provided on the isolation plate 14. A spray mechanism 20 is fixedly installed on the top of the dust removal chamber 8. A filter screen 13 is fixedly installed in the dust removal chamber 8. The filter screen 13 is arranged at an angle. A deodorization box 15 is fixedly installed in the deodorization chamber 9. The filter screen 13 can effectively filter dust in the exhaust gas and reduce the impact of the exhaust gas on the environment. The filter screen 13 is arranged at an angle to facilitate the collection of waste water for cleaning the filter screen 13.

[0028] The spray mechanism 20 includes a water inlet pipe 201 and a nozzle 202. The water inlet pipe 201 is fixedly installed on the inner top of the dust removal chamber 8, and the nozzle 202 is connected to the water inlet pipe 201. A water pump 12 is fixedly installed on the top of the dust removal box 11. The water outlet of the water pump 12 is connected to a water delivery pipe 16. One end of the water delivery pipe 16 is connected to the water inlet pipe 201. By setting the spray mechanism 20, the filter screen 13 can be cleaned to prevent the filtered dust from accumulating on the filter screen 13 and affecting the working efficiency of the device.

[0029] A fixing plate 19 is fixedly installed on the side of the dust removal box 11, and a blower 18 is fixedly installed on the top of the fixing plate 19. The air inlet of the blower 18 is connected to the odor removal chamber 9. A collecting box 17 is sealed and installed at the bottom of the dust removal box 11. A through hole is provided at the bottom of the dust removal box 11 to improve the flowability of the exhaust gas of the device through the blower 18.

[0030] Working principle: during specific use, when the flue gas passes through the transport pipe 21 to the air intake pipe 3, the first solenoid valve 4 is opened to allow the flue gas to pass through the air intake pipe 3 and enter the heating pipe 6 in the first water tank 1. When the flue gas flows in the heating pipe 6, the water in the first water tank 1 can be heated to reduce the temperature of the flue gas. After that, the flue gas flows through the guide pipe 7 to the connecting pipe 10, and then the flue gas enters the dust removal chamber 8 through the connecting pipe 10.

[0031] When the flue gas heats the water in the first water tank to a certain temperature, the first solenoid valve 4 is closed and the second solenoid valve 5 is opened to allow the flue gas to pass through the air intake pipe 3, so that the flue gas can be transported to the heating pipe 6 in the second water tank 2, and the flue gas flows in the heating pipe 6 in the second water tank 2, so that the flue gas heats the water in the second water tank 2.

[0032] After the flue gas enters the dust removal box 11, the dust in the flue gas can be filtered on the filter 13 when the flue gas passes through the filter 13, the water pump 12 is turned on, and the water is transported to the spray mechanism 20 through the water pipe 16 by the water pump 12, and the spray mechanism 20 is turned on to allow water to flow into the water inlet pipe 201, and the water is sprayed out through the nozzle 202 to clean the filter 13, so that the dust on the filter 13 and the waste liquid after cleaning can slide into the collection box 17 for collection, which is convenient for subsequent processing, and the odor in the flue gas can be adsorbed by passing through the deodorizing box 15 to reduce the pollution of the flue gas to the environment, and the blower 18 is turned on to rotate the impeller of the blower 18 to generate suction, thereby improving the fluidity of the exhaust gas in the dust removal box 11, so that the exhaust gas can be quickly discharged through the rotation of the impeller of the blower 18.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A boiler flue gas waste heat recovery device, comprising a first water storage tank (1) and a second water storage tank (2), characterized in that: A heating pipe (6) is fixedly installed in each of the first water storage tank (1) and the second water storage tank (2); an air intake pipe (3) is fixedly installed on the side of the first water storage tank (1) and the second water storage tank (2); the first water storage tank (1) and the second water storage tank (2) are connected via the air intake pipe (3); a transport pipe (21) is connected to the air intake pipe (3); a first solenoid valve (4) and a second solenoid valve (5) are arranged on the air intake pipe (3); The two ends of the guide pipe (3) are respectively connected to one end of the heating pipe (6) in the first water storage tank (1) and the second water storage tank (2); the first water storage tank (1) and the second water storage tank (2) are fixedly installed with a guide pipe (7) on the side; the two ends of the guide pipe (7) are respectively connected to the inside of the first water storage tank (1) and the second water storage tank (2); the two ends of the guide pipe (7) are respectively connected to the other end of the heating pipe (6) in the first water storage tank (1) and the second water storage tank (2).

2. A boiler flue gas waste heat recovery device according to claim 1, characterized in that: A dust removal box (11) is fixedly mounted on the side of the first water storage tank (1), the side of the dust removal box (11) is connected to a connecting pipe (10), and the end of the connecting pipe (10) is connected to the flow guide pipe (7).

3. A boiler flue gas waste heat recovery device according to claim 2, characterized in that: An isolation plate (14) is fixedly installed in the dust removal box (11), and the dust removal box (11) is divided into a dust removal chamber (8) and an odor removal chamber (9) by the isolation plate (14), and a through hole for smoke to pass through is provided on the isolation plate (14).

4. A boiler flue gas waste heat recovery device according to claim 3, characterized in that: A spray mechanism (20) is fixedly installed on the top of the dust removal chamber (8), a filter screen (13) is fixedly installed in the dust removal chamber (8), and the filter screen (13) is arranged in an inclined manner. A deodorizing box (15) is fixedly installed in the deodorizing chamber (9).

5. A boiler flue gas waste heat recovery device according to claim 4, characterized in that: The spray mechanism (20) comprises a water inlet pipe (201) and a spray head (202); the water inlet pipe (201) is fixedly mounted on the inner top of the dust removal chamber (8); and the spray head (202) is connected to the water inlet pipe (201).

6. A boiler flue gas waste heat recovery device according to claim 3, characterized in that: A water pump (12) is fixedly mounted on the top of the dust removal box (11); a water outlet of the water pump (12) is connected to a water pipe (16); one end of the water pipe (16) is connected to a water inlet pipe (201).

7. A boiler flue gas waste heat recovery device according to claim 6, characterized in that: A fixing plate (19) is fixedly mounted on the side of the dust removal box (11), a blower (18) is fixedly mounted on the top of the fixing plate (19), an air inlet of the blower (18) is connected to the odor removal chamber (9), a collecting box (17) is sealedly mounted on the bottom of the dust removal box (11), and a through hole is provided at the bottom of the dust removal box (11).

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