Thermal power plant boiler flue gas waste heat recovery device

Abstract

The invention discloses a thermal power plant boiler flue gas waste heat recovery device which comprises a boiler, a carbon cylinder, a recovery barrel, a transfer pipe and a recovery box, the boiler, the carbon cylinder, the recovery barrel, the transfer pipe and the recovery box are sequentially connected, a boiler coating sleeve is arranged on the outer side of the boiler, and the recovery barrel is communicated with the boiler coating sleeve through a first recovery barrel conveying pipe or a second recovery barrel conveying pipe. Belongs to the technical field of boiler preheating recovery, and is characterized in that a boiler, a carbon cylinder, a recovery barrel, a transfer pipe and a recovery box are sequentially connected, a boiler coating sleeve is arranged on the outer side of the boiler, a spiral gas passing pipe is arranged in the recovery barrel, one end of the spiral gas passing pipe is communicated with the carbon cylinder, and the other end of the spiral gas passing pipe is communicated with the transfer pipe; therefore, after flue gas is discharged from the boiler, part of particle waste residues can be filtered out through the carbon cylinder, then high-strength waste heat recovery is conducted in the recovery barrel through the spiral gas passing pipe, after recovery, the flue gas is conveyed into the recovery box through the transfer pipe to be subjected to gas washing, and the flue gas can be safely discharged after being subjected to gas washing.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler preheating recovery, and in particular relates to a flue gas waste heat recovery device for a thermal power plant boiler. Background Art

[0002] The main source of boiler flue gas waste heat is the heat generated during fuel combustion. The fuel is burned in the boiler to generate high-temperature flue gas, which exchanges heat with water vapor through combustion in the boiler. After the flue gas passes through the boiler flue, air preheater and other equipment, the temperature gradually decreases and is eventually discharged into the atmosphere. Even if the temperature of the flue gas has dropped to a certain level, it still contains a large amount of unused heat energy, which is the flue gas waste heat.

[0003] Boiler flue gas waste heat recovery is a technical means to improve energy efficiency and save energy by effectively utilizing the waste heat in boiler flue gas. When the boiler burns fuel, in addition to producing steam or hot water, a large amount of heat energy is also discharged into the atmosphere through flue gas. Flue gas waste heat recovery technology can convert this heat energy into useful energy, reduce boiler fuel consumption, reduce emissions, and improve the overall efficiency of the boiler.

[0004] The prior art often only performs environmentally friendly treatment of the exhaust gas during boiler flue gas treatment, but does not recover the waste heat of the exhaust gas very well, or cannot effectively use the recovered waste heat, so there is room for improvement. Summary of the invention

[0005] In order to overcome the above defects, the present invention provides a flue gas waste heat recovery device for a thermal power plant boiler to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thermal power plant boiler flue gas waste heat recovery device, comprising a boiler, a carbon cylinder, a recovery barrel, a transfer pipe and a recovery box, wherein the boiler, the carbon cylinder, the recovery barrel, the transfer pipe and the recovery box are connected in sequence, a boiler sheath is arranged on the outside of the boiler, the recovery barrel is connected to the boiler sheath through a recovery barrel delivery pipe 1 or a recovery barrel delivery pipe 2, and the recovery box is connected to the boiler sheath through a recovery box delivery pipe;

[0007] A spiral air pipe is arranged inside the recovery barrel, one end of the spiral air pipe is connected to the carbon cylinder, and the other end of the spiral air pipe is connected to the transfer pipe.

[0008] As a further solution of the present invention: a waste heat recovery device for flue gas from a boiler in a thermal power plant also includes a liquid feeding barrel, one side of which is connected to a liquid feeding pipe, and one end of the liquid feeding pipe away from the liquid feeding barrel is fixedly connected to and communicated with a recovery barrel.

[0009] As a further solution of the present invention: a waste heat recovery device for flue gas from a boiler in a thermal power plant further includes a support, and the recovery barrel and the recovery box are both fixedly mounted on one side of the support.

[0010] As a further solution of the present invention: a waste heat recovery device for boiler flue gas in a thermal power plant, a servo motor is fixedly installed on one side of the support, the output end of the servo motor passes through the support and is fixedly connected to a stirring blade, the end of the stirring blade away from the support is inserted into a recovery barrel, and a mechanical seal adapted to the stirring blade is provided on one side of the recovery barrel.

[0011] As a further solution of the present invention: a waste heat recovery device for boiler flue gas in a thermal power plant, wherein a connecting cylinder is fixedly installed on one side of the recovery barrel, and a water seal is fixedly connected to the other side of the recovery barrel, one end of the spiral air pipe is adapted to the connecting cylinder, and the other end of the spiral air pipe is adapted to the water seal, and one end of the spiral air pipe passes through the recovery barrel and the support and is connected to the transfer pipe.

[0012] As a further solution of the present invention: a waste heat recovery device for flue gas from a thermal power plant boiler, wherein a heat-conducting frame is fixedly connected to the interior of the boiler sheath, and the heat-conducting frame is fixedly connected to the boiler at a side away from the boiler sheath.

[0013] As a further solution of the present invention: a waste heat recovery device for boiler flue gas in a thermal power plant also includes a box gas washing assembly, the box gas washing assembly includes a box gas washing liquid port and a box gas washing liquid port cover, the box gas washing liquid port is fixedly connected and communicated with the recovery box, and the box gas washing liquid port cover is adapted to the box gas washing liquid port.

[0014] As a further solution of the present invention: a waste heat recovery device for boiler flue gas in a thermal power plant also includes a box exhaust assembly, the box exhaust assembly includes a box exhaust port and a box exhaust port cover, the box exhaust port is fixedly connected and communicated with the recovery box, and the box exhaust port cover is adapted to the box exhaust port.

[0015] As a further solution of the present invention: a waste heat recovery device for flue gas from a boiler in a thermal power plant, wherein an activated carbon bag is accommodated inside the carbon cylinder, and a door body is opened at the circumference of the carbon cylinder.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Since the boiler, carbon cylinder, recovery barrel, transfer pipe and recovery box are connected in sequence, a boiler covering sleeve is arranged on the outside of the boiler, and a spiral air pipe is arranged inside the recovery barrel. One end of the spiral air pipe is connected to the carbon cylinder, and the other end of the spiral air pipe is connected to the transfer pipe. Therefore, after the flue gas is discharged from the boiler, a part of the particulate waste residue can be filtered out through the carbon cylinder, and then the spiral air pipe is used to perform high-intensity waste heat recovery inside the recovery barrel, and after recovery, it is transferred to the recovery box through the transfer pipe for washing, and can be discharged safely after washing.

[0018] 2. Since the recovery barrel is connected to the boiler sheath through the recovery barrel delivery pipe 1 or the recovery barrel delivery pipe 2, and the recovery box is connected to the boiler sheath through the recovery box delivery pipe, after the recovery barrel and the recovery box exchange waste heat, the waste heat can be stored in the liquid for further use, or input into the boiler sheath through the recovery box delivery pipe, the recovery barrel delivery pipe 1 or the recovery barrel delivery pipe 2, and then the boiler is heated before working through the boiler sheath to increase the temperature of the boiler, thereby reducing the energy consumption and preheating time of preheating when the boiler is started, and achieving the purpose of reducing costs and increasing efficiency.

[0019] 3. Since a servo motor is fixedly installed on one side of the support, the output end of the servo motor is fixedly connected to a stirring blade after passing through the support, and the end of the stirring blade away from the support penetrates into the recovery barrel. A mechanical seal adapted to the stirring blade is provided on one side of the recovery barrel. When the exhaust gas in the spiral air pipe exchanges heat with the liquid in the recovery barrel, the stirring of the stirring blade can accelerate the process and improve the efficiency of waste heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the schematic diagrams of the overall structure of a flue gas waste heat recovery device for a thermal power plant boiler according to the present invention;

[0021] Figure 2 This is a second schematic diagram of the overall structure of a flue gas waste heat recovery device for a thermal power plant boiler according to the present invention;

[0022] Figure 3 It is a schematic diagram of the internal structure of a recovery barrel in a flue gas waste heat recovery device for a thermal power plant boiler according to the present invention;

[0023] Figure 4 A waste heat recovery device for flue gas from a boiler in a thermal power plant according to the present invention Figure 1 The enlarged view of point A in the middle;

[0024] In the figure: 1. boiler; 2. carbon cylinder; 3. recovery barrel; 4. transfer pipe; 5. recovery box; 6. recovery box delivery pipe; 7. boiler covering sleeve; 8. recovery barrel delivery pipe 1; 9. recovery barrel delivery pipe 2; 10. liquid supply barrel; 11. liquid supply pipe; 12. box washing assembly; 121. box washing liquid inlet; 122. box washing liquid inlet cover; 13. box exhaust assembly; 131. box exhaust port; 132. box exhaust port cover; 14. support; 15. connecting cylinder; 16. spiral air pipe; 17. stirring blade; 18. water seal; 19. servo motor; 20. heat transfer frame. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of its embodiments based on the overall structure of the present invention.

[0027] As shown in the accompanying drawings, the present invention provides a technical solution: a thermal power plant boiler flue gas waste heat recovery device, comprising a boiler 1, a carbon cylinder 2, a recovery barrel 3, a transfer pipe 4 and a recovery box 5, wherein the boiler 1, the carbon cylinder 2, the recovery barrel 3, the transfer pipe 4 and the recovery box 5 are connected in sequence, a boiler sheath 7 is arranged on the outside of the boiler 1, the recovery barrel 3 is connected to the boiler sheath 7 through a recovery barrel delivery pipe 1 8 or a recovery barrel delivery pipe 2 9, and the recovery box 5 is connected to the boiler sheath 7 through a recovery box delivery pipe 6;

[0028] A spiral air pipe 16 is disposed inside the recovery barrel 3 , one end of the spiral air pipe 16 is connected to the carbon cartridge 2 , and the other end of the spiral air pipe 16 is connected to the transfer pipe 4 .

[0029] As a further solution of the present invention: a waste heat recovery device for flue gas from a boiler in a thermal power plant also includes a liquid feeding barrel 10, one side of which is connected to a liquid feeding pipe 11, and one end of the liquid feeding pipe 11 away from the liquid feeding barrel 10 is fixedly connected and connected to a recovery barrel 3.

[0030] As a further solution of the present invention: a waste heat recovery device for flue gas from a boiler in a thermal power plant further includes a support 14 , and the recovery barrel 3 and the recovery box 5 are both fixedly mounted on one side of the support 14 .

[0031] As a further solution of the present invention: a waste heat recovery device for boiler flue gas in a thermal power plant, a servo motor 19 is fixedly installed on one side of the support 14, the output end of the servo motor 19 passes through the support 14 and is fixedly connected to a stirring blade 17, the end of the stirring blade 17 away from the support 14 penetrates into the recovery barrel 3, and a mechanical seal adapted to the stirring blade 17 is provided on one side of the recovery barrel 3.

[0032] Since a servo motor 19 is fixedly installed on one side of the support 14, the output end of the servo motor 19 is fixedly connected to a stirring blade 17 after passing through the support 14, and the end of the stirring blade 17 away from the support 14 penetrates into the recovery barrel 3, and a mechanical seal adapted to the stirring blade 17 is provided on one side of the recovery barrel 3. When the exhaust gas in the spiral air pipe 16 exchanges heat with the liquid in the recovery barrel 3, the stirring of the stirring blade 17 can accelerate the process and improve the efficiency of waste heat recovery.

[0033] As a further solution of the present invention: a waste heat recovery device for boiler flue gas in a thermal power plant, wherein a connecting tube 15 is fixedly installed on one side of the recovery barrel 3, and a water seal 18 is fixedly connected to the other side of the recovery barrel 3, one end of the spiral air pipe 16 is adapted to the connecting tube 15, and the other end of the spiral air pipe 16 is adapted to the water seal 18, and one end of the spiral air pipe 16 passes through the recovery barrel 3 and the support 14 and is connected to the transfer pipe 4.

[0034] As a further solution of the present invention: a waste heat recovery device for flue gas from a thermal power plant boiler, wherein a heat conducting frame 20 is fixedly connected to the interior of the boiler sheath 7, and the heat conducting frame 20 is fixedly connected to the boiler 1 at a side away from the boiler sheath 7.

[0035] As a further solution of the present invention: a waste heat recovery device for boiler flue gas in a thermal power plant, further comprising a box gas washing assembly 12, wherein the box gas washing assembly 12 comprises a box gas washing liquid port 121 and a box gas washing liquid port cover 122, wherein the box gas washing liquid port 121 is fixedly connected and communicated with the recovery box 5, and the box gas washing liquid port cover 122 is adapted to the box gas washing liquid port 121.

[0036] As a further solution of the present invention: a waste heat recovery device for boiler flue gas in a thermal power plant, further comprising a box exhaust assembly 13, wherein the box exhaust assembly 13 comprises a box exhaust port 131 and a box exhaust port cover 132, wherein the box exhaust port 131 is fixedly connected and communicated with the recovery box 5, and the box exhaust port cover 132 is adapted to the box exhaust port 131.

[0037] As a further solution of the present invention: a waste heat recovery device for flue gas from a boiler in a thermal power plant, wherein an activated carbon bag is accommodated inside the carbon cylinder 2, and a door body is opened at the circumference of the carbon cylinder 2.

[0038] The working principle of the present invention is as follows: since the boiler 1, the carbon cylinder 2, the recovery barrel 3, the transfer pipe 4, and the recovery box 5 are connected in sequence, a boiler covering sleeve 7 is provided on the outside of the boiler 1, and a spiral air pipe 16 is provided inside the recovery barrel 3. One end of the spiral air pipe 16 is connected to the carbon cylinder 2, and the other end of the spiral air pipe 16 is connected to the transfer pipe 4. Therefore, after the flue gas is discharged from the boiler 1, a part of the particulate waste residue can be filtered out through the carbon cylinder 2, and then high-intensity waste heat recovery is carried out inside the recovery barrel 3 through the spiral air pipe 16, and after recovery, it is transferred to the recovery box 5 through the transfer pipe 4 for air washing, and can be discharged safely after air washing.

[0039] Since the recovery barrel 3 is connected to the boiler sheathing sleeve 7 through the recovery barrel delivery pipe 1 8 or the recovery barrel delivery pipe 2 9, and the recovery box 5 is connected to the boiler sheathing sleeve 7 through the recovery box delivery pipe 6, after the recovery barrel 3 and the recovery box 5 exchange waste heat, the waste heat can be selected to be stored in the liquid for further use, or input into the boiler sheathing sleeve 7 through the recovery box delivery pipe 6, the recovery barrel delivery pipe 1 8 or the recovery barrel delivery pipe 2 9, and then the boiler 1 is pre-heated through the boiler sheathing sleeve 7 to increase the temperature of the boiler 1, thereby reducing the energy consumption and preheating time of preheating when the boiler 1 is started, and achieving the purpose of reducing costs and increasing efficiency.

[0040] Since a servo motor 19 is fixedly installed on one side of the support 14, the output end of the servo motor 19 is fixedly connected to a stirring blade 17 after passing through the support 14, and the end of the stirring blade 17 away from the support 14 penetrates into the recovery barrel 3, and a mechanical seal adapted to the stirring blade 17 is provided on one side of the recovery barrel 3. When the exhaust gas in the spiral air pipe 16 exchanges heat with the liquid in the recovery barrel 3, the stirring of the stirring blade 17 can accelerate the process and improve the efficiency of waste heat recovery.

[0041] What has been described above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical scheme and inventive concept of the present invention, which should be covered within the protection scope of the present invention. Various changes can also be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A waste heat recovery device for flue gas from a thermal power plant boiler, characterized in that: The invention comprises a boiler (1), a carbon cartridge (2), a recovery barrel (3), a transfer pipe (4) and a recovery box (5), wherein the boiler (1), the carbon cartridge (2), the recovery barrel (3), the transfer pipe (4) and the recovery box (5) are connected in sequence, a boiler sheath (7) is arranged on the outer side of the boiler (1), the recovery barrel (3) is connected to the boiler sheath (7) through a recovery barrel delivery pipe 1 (8) or a recovery barrel delivery pipe 2 (9), and the recovery box (5) is connected to the boiler sheath (7) through a recovery box delivery pipe (6); A spiral air pipe (16) is arranged inside the recovery barrel (3), one end of the spiral air pipe (16) is connected to the carbon cartridge (2), and the other end of the spiral air pipe (16) is connected to the transfer pipe (4).

2. A thermal power plant boiler flue gas waste heat recovery device according to claim 1, characterized in that: It also comprises a liquid supply barrel (10), one side of which is connected to a liquid supply pipe (11), and one end of the liquid supply pipe (11) away from the liquid supply barrel (10) is fixedly connected to and connected to the recovery barrel (3).

3. A thermal power plant boiler flue gas waste heat recovery device according to claim 2, characterized in that: It also comprises a support (14), and the recovery barrel (3) and the recovery box (5) are both fixedly mounted on one side of the support (14).

4. A thermal power plant boiler flue gas waste heat recovery device according to claim 3, characterized in that: A servo motor (19) is fixedly mounted on one side of the support (14); an output end of the servo motor (19) passes through the support (14) and is fixedly connected to a stirring blade (17); an end of the stirring blade (17) away from the support (14) penetrates into the recovery barrel (3); and a mechanical seal adapted to the stirring blade (17) is provided on one side of the recovery barrel (3).

5. A thermal power plant boiler flue gas waste heat recovery device according to claim 4, characterized in that: A connecting tube (15) is fixedly mounted on one side of the recovery barrel (3), and a water seal (18) is fixedly connected to the other side of the recovery barrel (3). One end of the spiral air pipe (16) is matched with the connecting tube (15), and the other end of the spiral air pipe (16) is matched with the water seal (18). One end of the spiral air pipe (16) passes through the recovery barrel (3) and the support (14) and is connected to the transfer pipe (4).

6. A thermal power plant boiler flue gas waste heat recovery device according to claim 5, characterized in that: A heat-conducting frame (20) is fixedly connected inside the boiler covering sleeve (7), and the side of the heat-conducting frame (20) away from the boiler covering sleeve (7) is fixedly connected to the boiler (1).

7. A thermal power plant boiler flue gas waste heat recovery device according to claim 6, characterized in that: The invention also comprises a tank air-washing assembly (12), wherein the tank air-washing assembly (12) comprises a tank air-washing liquid inlet (121) and a tank air-washing liquid inlet cover (122), wherein the tank air-washing liquid inlet (121) is fixedly connected to and communicates with the recovery tank (5), and the tank air-washing liquid inlet cover (122) is adapted to the tank air-washing liquid inlet (121).

8. The device for recovering waste heat from flue gas of a thermal power plant boiler according to claim 7, characterized in that: It also comprises a box exhaust assembly (13), the box exhaust assembly (13) comprising a box exhaust port (131) and a box exhaust port cover (132), the box exhaust port (131) is fixedly connected to and communicates with the recovery box (5), and the box exhaust port cover (132) is adapted to the box exhaust port (131).

9. A thermal power plant boiler flue gas waste heat recovery device according to claim 8, characterized in that: An activated carbon bag is accommodated inside the carbon cylinder (2), and a door body is provided at the circumference of the carbon cylinder (2).

Images