Desulfurization device with waste heat recovery function

Abstract

The invention relates to the technical field of waste heat recovery, one embodiment of the invention provides a desulfurization device with a waste heat recovery function, the desulfurization device comprises a desulfurization tower body, one side of the desulfurization tower body is provided with an air inlet, the desulfurization device further comprises a low-pressure steam main pipe, a heat exchange box, an activated carbon filler layer and a discharge mechanism, the low-pressure steam main pipe is communicated with the air inlet, and the heat exchange box is communicated with the activated carbon filler layer; the heat exchange box is arranged in the desulfurization tower body through the heat exchange mechanism, the heat exchange box is communicated with the gas inlet, the heat exchange mechanism is used for recycling waste heat in flue gas, the activated carbon filler layer is arranged in the desulfurization tower body, the spraying mechanism is arranged above the activated carbon filler layer, and the discharging mechanism is arranged on one side of the desulfurization tower body. The invention discloses a desulfurization tower, which is used for solving the technical problems that in the prior art, after industrial waste gas is desulfurized by a desulfurization tower, a large amount of waste heat in the gas is still not utilized, and if the unutilized gas is directly discharged, not only is resource waste caused, but also the surrounding environment is possibly influenced.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of waste heat recovery, and in particular, to a desulfurization device with a waste heat recovery function. Background Art

[0002] The disorderly emission of sulfur-containing flue gas has become one of the main causes of air pollution, posing a continuous threat to the ecological environment and human health. Desulfurization equipment has become a key equipment for pollution control. Desulfurization equipment can effectively reduce the content of sulfur dioxide SO2 in industrial waste gas through chemical absorption, adsorption and other technical means. Among the many desulfurization processes, activated carbon has become a very potential adsorbent in the field of industrial desulfurization due to its huge specific surface area, rich pore structure and unique surface chemical properties. The active sites on the surface of activated carbon can undergo physical adsorption or catalytic oxidation reaction with SO2 in the flue gas, converting it into sulfuric acid or sulfurous acid and adsorbing it in the pores of activated carbon, thereby achieving the environmental protection goal of efficient desulfurization. In addition, through regeneration treatment, activated carbon can be reused, significantly reducing operating costs.

[0003] The exhaust gas temperature design value of coal-fired boilers in thermal power plants is usually maintained in the range of 145℃-150℃. The sensible heat carried by this part of high-temperature flue gas accounts for about 3%-8% of the total heat input of the boiler. However, after the desulfurization system currently uses activated carbon adsorption to complete the flue gas desulfurization purification, the treated gas still maintains a relatively high temperature, containing a large amount of waste heat that has not been fully utilized. If this part of high-temperature gas is directly discharged into the atmosphere, it will not only cause a waste of resources, but may also have an impact on the surrounding environment. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the embodiments of the present disclosure provide a desulfurization device with a waste heat recovery function, which is used to solve the technical problem in the prior art that after the desulfurization tower desulfurizes industrial waste gas, there is still a large amount of waste heat inside the gas that is not utilized. If the unused gas is directly discharged, it will not only cause a waste of resources, but may also have an impact on the surrounding environment.

[0005] According to one aspect, at least one embodiment of the present disclosure provides a desulfurization device with a waste heat recovery function, including a desulfurization tower body, an air inlet being opened on one side of the desulfurization tower body, and also including: a low-pressure steam main pipe, a heat exchange box, an activated carbon packing layer and an emission mechanism, the low-pressure steam main pipe is connected to the air inlet, the heat exchange box is arranged in the desulfurization tower body through the heat exchange mechanism, and the heat exchange box is connected to the air inlet, the heat exchange mechanism is used to recover the waste heat in the flue gas, the activated carbon packing layer is arranged in the desulfurization tower body, and a spray mechanism is provided above the activated carbon packing layer, the spray mechanism is used to spray sulfur-containing flue gas onto the activated carbon packing layer, and the emission mechanism is arranged on one side of the desulfurization tower body, for discharging the flue gas after desulfurization and cooling.

[0006] In order to recover waste heat from high-temperature flue gas, the heat exchange mechanism includes: a heat exchange coil, an insulated water tank, a first water pump and an air guide component. The heat exchange coil is fixedly connected in the heat exchange box, and the insulated water tank is fixedly connected to one side of the desulfurization tower body. One end of the heat exchange coil passes through the insulated water tank and extends to the inside of the insulated water tank. The first water pump is installed on one side of the insulated water tank. The input end of the first water pump is connected to the insulated water tank, and the other end of the heat exchange coil is connected to the output end of the first water pump. The air guide component is arranged at the bottom end of the heat exchange box for guiding the flue gas after heat exchange to the inside of the desulfurization tower body.

[0007] In order to transport the flue gas after heat exchange into the desulfurization tower body, the air guide component includes: an air guide box, a rotating shaft, an air guide fan and a drive component. An air guide port is opened at the bottom end of the heat exchange box, and the air guide box is connected to the air guide port. There are two rotating shafts, and both rotating shafts are rotatably connected in the air guide box. The two sides of the air guide fan are respectively fixedly connected to the opposite ends of the two rotating shafts. The drive component is arranged on one of the rotating shafts, and is used to drive the rotating shaft and the air guide fan to swing.

[0008] In order to drive the air guide fan to swing when guiding the flue gas, the driving assembly includes: a rotating gear, a rack and a first electric cylinder. The rotating gear is fixedly connected to one end of one of the rotating shafts, and the rack is engaged with the rotating gear. The first electric cylinder is installed on one side of the desulfurization tower body, and the output end of the first electric cylinder passes through the desulfurization tower body and is fixedly connected to one end of the rack.

[0009] In order to spray the flue gas onto the activated carbon filling layer, the spray mechanism includes: a spray pipe, a spray head, a water supply assembly and a swing assembly. There are two spray pipes, and the two spray pipes are rotatably connected to the desulfurization tower body. Each spray pipe is connected to multiple spray heads. The water supply assembly is arranged on one side of the desulfurization tower body, and is used to transport the water in the desulfurization tower body into the spray pipe. The two ends of the connecting hose are respectively connected to the two spray pipes. The second water pump is installed on one side of the desulfurization tower body, and the output end of the second water pump is connected to the desulfurization tower body. The output end of the second water pump is connected to the connecting hose. The swing assembly is arranged on one side of the desulfurization tower body, and is used to drive the two spray pipes to swing.

[0010] In order to drive the spray pipe to swing and increase the spray area of ​​the spray head, the swing assembly includes: a transmission gear, a gear rack and a second electric cylinder. One end of the two spray pipes is fixedly connected to the transmission gear. The gear rack is slidably connected to one side of the desulfurization tower body through a sliding rod. The gear rack is engaged with the two transmission gears. The second electric cylinder is installed on one side of the desulfurization tower body, and the output end of the second electric cylinder is fixedly connected to the top of the gear rack.

[0011] In order to discharge the flue gas after desulfurization, the discharge mechanism includes: an exhaust fan, an exhaust box and an exhaust pipe. A discharge port is opened on one side of the desulfurization tower body. The exhaust fan is installed in the exhaust port. The exhaust box is fixedly connected to the exhaust port. The exhaust fan is located in the exhaust box. The exhaust pipe is connected to one side of the exhaust box.

[0012] In order to transport the flue gas into the desulfurization tower body, a delivery pipe is fixedly connected to the air inlet, and the other end of the delivery pipe is connected to the low-pressure steam main pipe.

[0013] In order to transport the water in the desulfurization tower body into the spray pipe, the water supply assembly includes: a connecting hose and a second water pump, the two ends of the connecting hose are respectively connected to the two spray pipes, the second water pump is installed on one side of the desulfurization tower body, the output end of the second water pump is connected to the desulfurization tower body, and the output end of the second water pump is connected to the connecting hose.

[0014] In order to increase the spraying area, the two groups of spray heads are arranged opposite to each other. The beneficial effects of the embodiments of the present disclosure are: In the present disclosure, the setting of the heat exchange mechanism facilitates the recovery of waste heat from the high-temperature flue gas entering the desulfurization tower body. The flue gas after waste heat recovery enters the desulfurization tower body. The setting of the spraying mechanism and the activated carbon filler layer facilitates the desulfurization operation of the flue gas after waste heat recovery, thereby reducing the waste of heat energy in the flue gas and reducing pollution to the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly describes the drawings required for use in describing the embodiments of the present disclosure. Obviously, the drawings described below are merely some exemplary embodiments of the present disclosure. Those skilled in the art can, without inventive effort, derive other drawings based on the content of the exemplary embodiments of the present disclosure and these drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present disclosure; Figure 2 A schematic structural diagram of another angle of view of an embodiment of the present disclosure; Figure 3 This is a schematic cross-sectional structural diagram of an embodiment of the present disclosure; Figure 4 This is a schematic structural diagram of a heat exchange mechanism in one embodiment of the present disclosure; Figure 5 This is a structural diagram of a spray mechanism in one embodiment of the present disclosure; Figure 6This is a schematic structural diagram of a discharge mechanism in one embodiment of the present disclosure; Figure 7 In one embodiment of the present disclosure Figure 4 Schematic diagram of the locally enlarged structure at point A in the middle.

[0017] In the figure: 1. Desulfurization tower body; 2. Low-pressure steam main pipe; 3. Heat exchange box; 4. Activated carbon filler layer; 5. Heat exchange coil; 6. Insulated water tank; 7. First water pump; 8. Air guide box; 9. Rotating shaft; 10. Air guide fan; 11. Rotating gear; 12. Rack; 13. First electric cylinder; 14. Spray pipe; 15. Spray head; 16. Connecting hose; 17. Second water pump; 18. Transmission gear; 19. Gear rack; 20. Second electric cylinder; 21. Exhaust fan; 22. Exhaust box; 23. Exhaust pipe; 24. Delivery pipe; 25. Sliding rod. DETAILED DESCRIPTION The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0018] To simplify the drawings, only the parts relevant to the disclosure are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0019] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0020] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, 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. Therefore, they should not be understood as limitations on the present disclosure.

[0022] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] like Figures 1 to 7 As shown, it shows a desulfurization device with waste heat recovery function in one embodiment of the present disclosure, including a desulfurization tower body 1, an air inlet is opened on one side of the desulfurization tower body 1, a delivery pipe 24 is fixedly connected to the air inlet, and the other end of the delivery pipe 24 is connected to the low-pressure steam main pipe 2, and also includes: a low-pressure steam main pipe 2, a heat exchange box 3, an activated carbon filler layer 4 and a discharge mechanism, the low-pressure steam main pipe 2 is connected to the air inlet, the heat exchange box 3 is arranged in the desulfurization tower body 1 through the heat exchange mechanism, and the heat exchange box 3 is connected to the air inlet, the heat exchange mechanism is used to recover the waste heat in the flue gas, the activated carbon filler layer 4 is provided It is placed in the desulfurization tower body 1, and a spray mechanism is provided above the activated carbon filler layer 4. The spray mechanism is used to spray the sulfur-containing flue gas onto the activated carbon filler layer 4. The discharge mechanism is arranged on one side of the desulfurization tower body 1, and is used to discharge the flue gas after desulfurization and cooling. Through the arrangement of the heat exchange mechanism, it is convenient to recover the waste heat of the high-temperature flue gas entering the desulfurization tower body 1. The flue gas after the waste heat recovery enters the desulfurization tower body 1. Through the arrangement of the spray mechanism and the activated carbon filler layer 4, it is convenient to perform desulfurization operation on the flue gas after the waste heat recovery, thereby reducing the waste of heat energy in the flue gas and reducing pollution to the surrounding environment.

[0024] The heat exchange mechanism includes: a heat exchange coil 5, an insulated water tank 6, a first water pump 7 and an air guide component. The heat exchange coil 5 is fixedly connected to the heat exchange box 3, and the insulated water tank 6 is fixedly connected to one side of the desulfurization tower body 1. One end of the heat exchange coil 5 passes through the insulated water tank 6 and extends to the inside of the insulated water tank 6. The first water pump 7 is installed on one side of the insulated water tank 6. The input end of the first water pump 7 is connected to the insulated water tank 6, and the other end of the heat exchange coil 5 is connected to the output end of the first water pump 7. The air guide component is arranged at the bottom end of the heat exchange box 3 for guiding the flue gas after heat exchange to the inside of the desulfurization tower body 1. The air guide component includes: an air guide box 8, a rotating shaft 9, an air guide fan 10 and a drive component. The bottom end of the heat exchange box 3 is opened There is an air guide port, and the air guide box 8 is connected to the air guide port. Two rotating shafts 9 are provided, and the two rotating shafts 9 are rotatably connected in the air guide box 8. The two sides of the air guide fan 10 are respectively fixedly connected to the opposite ends of the two rotating shafts 9. The driving component is set on one of the rotating shafts 9, which is used to drive the rotating shaft 9 and the air guide fan 10 to swing. The driving component includes: a rotating gear 11, a rack 12 and a first electric cylinder 13. The rotating gear 11 is fixedly connected to one end of one of the rotating shafts 9, and the rack 12 is engaged with the rotating gear 11. The first electric cylinder 13 is installed on one side of the desulfurization tower body 1, and the output end of the first electric cylinder 13 passes through the desulfurization tower body 1 and is fixedly connected to one end of the rack 12.

[0025] The high-temperature flue gas enters the heat exchange box 3 through the air inlet pipe, and then the water in the water tank is pumped out by the first water pump 7 and transported to the heat exchange coil 5. The water flows in the heat exchange coil 5 and flows back to the water tank. The cycle continues, and the water is heated by the high-temperature flue gas, thereby realizing waste heat recovery. The flue gas after heat exchange is blown into the desulfurization tower body 1 through the air guide fan 10. At this time, the rack 12 is driven to move by the first electric cylinder 13, thereby driving the rotating gear 11 engaged with the rack 12 to rotate, thereby driving the rotating shaft 9 and the guide fan to swing, thereby guiding the flue gas after heat exchange into the desulfurization tower body 1.

[0026] The spray mechanism includes: a spray pipe 14, a spray head 15, a water supply assembly, a connecting hose 16, a second water pump 17 and a swing assembly. The two groups of spray heads 15 are arranged opposite to each other. There are two spray pipes 14, and the two spray pipes 14 are rotatably connected to the desulfurization tower body 1. Each spray pipe 14 is connected to multiple spray heads 15. The water supply assembly is arranged on one side of the desulfurization tower body 1 and is used to transport the water in the desulfurization tower body 1 into the spray pipe 14. The two ends of the connecting hose 16 are respectively connected to the two spray pipes 14. The second water pump 17 is installed on one side of the desulfurization tower body 1. The output of the second water pump 17 The end is connected to the desulfurization tower body 1, the output end of the second water pump 17 is connected to the connecting hose 16, and the swing component is arranged on one side of the desulfurization tower body 1, for driving the two spray pipes 14 to swing, and the swing component includes: a transmission gear 18, a gear rack 19 and a second electric cylinder 20. One end of the two spray pipes 14 is fixedly connected to the transmission gear 18, and the gear rack 19 is slidably connected to one side of the desulfurization tower body 1 through a sliding rod 25. The gear rack 19 is engaged with the two transmission gears 18, and the second electric cylinder 20 is installed on one side of the desulfurization tower body 1, and the output end of the second electric cylinder 20 is fixedly connected to the top of the gear rack 19.

[0027] The water in the desulfurization tower body 1 is pumped out by the second water pump 17, and the water is transported into the two spray pipes 14 through the connecting hose 16, and sprayed out through multiple spray heads 15, so that the sprayed water comes into contact with the flue gas, and the flue gas is brought to the activated carbon filler layer 4, and the flue gas is desulfurized by the activated carbon filler layer 4. During the spraying process of the spray head 15, the gear rack 19 is driven to move by the second electric cylinder 20, thereby driving the transmission gear 18 to rotate, thereby driving the spray pipe 14 and the spray head 15 to swing, thereby increasing the spraying area.

[0028] The discharge mechanism includes: an discharge fan 21, a discharge box 22 and a discharge pipe 23. A discharge port is opened on one side of the desulfurization tower body 1. The discharge fan 21 is installed in the discharge port. The discharge box 22 is fixedly connected to the discharge port. The discharge fan 21 is located in the discharge box 22, and the discharge pipe 23 is connected to one side of the discharge box 22.

[0029] The flue gas that passes through the activated carbon filler layer 4 is poured into the exhaust box 22 and the exhaust pipe 23 by the exhaust fan, so that the flue gas is discharged through the exhaust pipe 23.

[0030] Working principle: when it is necessary to recover the waste heat of the flue gas, the high-temperature flue gas enters the heat exchange box 3 through the air inlet pipe, and then the water in the water tank is pumped out by the first water pump 7 and transported to the heat exchange coil 5. The water flows in the heat exchange coil 5 and flows back to the water tank. In this cycle, the water is heated by the high-temperature flue gas, thereby realizing waste heat recovery, and the flue gas after heat exchange is blown into the desulfurization tower body 1 through the air guide fan 10. At this time, the rack 12 is driven to move by the first electric cylinder 13, thereby driving the rotating gear 11 engaged with the rack 12 to rotate, thereby driving the rotating shaft 9 and the guide fan to swing, thereby guiding the flue gas after heat exchange into the desulfurization tower body 1, and then through the second water pump 17 extracts the water in the desulfurization tower body 1, and transports the water into the two spray pipes 14 through the connecting hose 16, and sprays it through multiple spray heads 15, so that the sprayed water contacts the flue gas, and brings the flue gas to the activated carbon filler layer 4, and desulfurizes the flue gas through the activated carbon filler layer 4. During the spraying process of the spray head 15, the gear rack 19 is driven to move by the second electric cylinder 20, thereby driving the transmission gear 18 to rotate, thereby driving the spray pipe 14 and the spray head 15 to swing, thereby increasing the spraying area, and the flue gas passing through the activated carbon filler layer 4 is poured into the exhaust box 22 and the exhaust pipe 23 through the exhaust fan, so that the flue gas can be discharged through the exhaust pipe 23.

[0031] It should also be added that during the spraying process of the flue gas, water can cool the flue gas. In addition, before the flue gas enters the desulfurization tower body 1, it needs to first enter the low-pressure steam main pipe 2. The low-pressure steam main pipe 2 acts as a "resource integration center" in waste heat recovery. It is connected to various waste heat sources through standardized interfaces, and combined with pressure control, flow distribution and equipment coordination, the dispersed waste heat is converted into usable steam energy. The flue gas passes through the low-pressure steam main pipe 2, and after pressure control and flow distribution, it enters the desulfurization tower body 1 for waste heat recovery and desulfurization.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not limiting. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all of these should be included in the scope of the claims of the present disclosure.

Claims

1. A desulfurization device with waste heat recovery function, comprising a desulfurization tower body (1), wherein an air inlet is provided on one side of the desulfurization tower body (1), characterized in that: Also includes: A low-pressure steam main pipe (2), the low-pressure steam main pipe (2) being in communication with the air inlet; A heat exchange box (3), the heat exchange box (3) being arranged in the desulfurization tower body (1) via a heat exchange mechanism, and the heat exchange box (3) being in communication with an air inlet, the heat exchange mechanism being used to recover waste heat in the flue gas; The heat exchange mechanism comprises: a heat exchange coil (5), the heat exchange coil (5) is fixedly connected to the heat exchange box (3); An activated carbon filler layer (4), the activated carbon filler layer (4) being arranged in the desulfurization tower body (1), a spray mechanism being provided above the activated carbon filler layer (4), the spray mechanism being used to spray sulfur-containing flue gas onto the activated carbon filler layer (4); An emission mechanism is provided on one side of the desulfurization tower body (1) and is used for emitting the flue gas after desulfurization and cooling.

2. A desulfurization device with waste heat recovery function according to claim 1, characterized in that: The heat exchange mechanism further includes: An insulated water tank (6), the insulated water tank (6) being fixedly connected to one side of the desulfurization tower body (1), and one end of the heat exchange coil (5) passing through the insulated water tank (6) and extending into the interior of the insulated water tank (6); a first water pump (7), the first water pump (7) being installed on one side of the thermal insulation water tank (6), the input end of the first water pump (7) being in communication with the thermal insulation water tank (6), and the other end of the heat exchange coil (5) being in communication with the output end of the first water pump (7); An air guide component is provided at the bottom end of the heat exchange box (3) and is used to guide the flue gas after heat exchange into the interior of the desulfurization tower body (1).

3. The desulfurization device with waste heat recovery function according to claim 2, characterized in that: The air guide assembly comprises: An air guide box (8), wherein an air guide port is provided at the bottom end of the heat exchange box (3), and the air guide box (8) is connected to the air guide port; A rotating shaft (9), wherein two rotating shafts (9) are provided, and both rotating shafts (9) are rotatably connected in the air guide box (8); An air guide fan (10), wherein both sides of the air guide fan (10) are fixedly connected to opposite ends of the two rotating shafts (9); A drive assembly is provided on one of the rotating shafts (9) and is used to drive the rotating shaft (9) and the air guide fan (10) to swing.

4. The desulfurization device with waste heat recovery function according to claim 3, characterized in that: The drive assembly includes: a rotating gear (11), the rotating gear (11) being fixedly connected to one end of one of the rotating shafts (9); a rack (12), the rack (12) being meshed with the rotating gear (11); A first electric cylinder (13) is installed on one side of the desulfurization tower body (1), and an output end of the first electric cylinder (13) passes through the desulfurization tower body (1) and is fixedly connected to one end of the rack (12).

5. The desulfurization device with waste heat recovery function according to claim 4, characterized in that: The spray mechanism comprises: A spray pipe (14), wherein two spray pipes (14) are provided, and both spray pipes (14) are rotatably connected to the desulfurization tower body (1); Spray heads (15), each of the spray pipes (14) is connected to a plurality of the spray heads (15); A water supply assembly, the water supply assembly being arranged on one side of the desulfurization tower body (1) and being used for conveying water in the desulfurization tower body (1) into the spray pipe (14); A swing assembly is provided on one side of the desulfurization tower body (1) and is used to drive the two spray pipes (14) to swing.

6. The desulfurization device with waste heat recovery function according to claim 5, characterized in that: The swing assembly comprises: A transmission gear (18), one end of each of the two spray pipes (14) being fixedly connected to the transmission gear (18); A gear rack (19), the gear rack (19) is slidably connected to one side of the desulfurization tower body (1) via a sliding rod (25), and the gear rack (19) is meshed with the two transmission gears (18); A second electric cylinder (20) is installed on one side of the desulfurization tower body (1), and an output end of the second electric cylinder (20) is fixedly connected to the top end of the gear rack (19).

7. The desulfurization device with waste heat recovery function according to claim 6, characterized in that: The discharge mechanism includes: An exhaust fan (21), a exhaust port is provided on one side of the desulfurization tower body (1), and the exhaust fan (21) is installed in the exhaust port; A discharge box (22), the discharge box (22) is fixedly connected to the discharge port, and the discharge fan (21) is located in the discharge box (22); A discharge pipe (23) is connected to one side of the discharge box (22).

8. The desulfurization device with waste heat recovery function according to claim 7, characterized in that: A delivery pipe (24) is fixedly connected to the air inlet, and the other end of the delivery pipe (24) is in communication with the low-pressure steam main pipe (2).

9. The desulfurization device with waste heat recovery function according to claim 5, characterized in that: The water supply assembly includes: A connecting hose (16), wherein both ends of the connecting hose (16) are respectively connected to the two spray pipes (14); A second water pump (17), the second water pump (17) is installed on one side of the desulfurization tower body (1), the output end of the second water pump (17) is connected to the desulfurization tower body (1), and the output end of the second water pump (17) is connected to the connecting hose (16).

10. The desulfurization device with waste heat recovery function according to claim 5, characterized in that: The two groups of spray heads (15) are arranged opposite to each other.

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