Flue gas white smoke elimination and waste heat recovery equipment for coal-fired boiler

Abstract

The invention relates to the technical field of boiler energy conservation and environmental protection, in particular to coal-fired boiler flue gas white smoke elimination and waste heat recovery equipment which comprises a regeneration tower, a desulfurization tower and an absorption tower, an air inducing sleeve is fixedly connected to one side of the regeneration tower, a rotating shaft is rotatably connected into the air inducing sleeve, a plurality of blades and cams are fixedly connected to the rotating shaft, and the blades are fixedly connected to the desulfurization tower. A cavity is formed in the regeneration tower, a transverse plate and an inclined plate are fixedly connected to the interior of the cavity, inclined pipes are fixedly connected to the transverse plate and the inclined plate, a hollow floating plate is slidably arranged in the cavity, and a sliding assembly is arranged on the regeneration tower; the desulfurization tower is respectively connected with the regeneration tower and the absorption tower through two communicating pipes, and one side of the regeneration tower is fixedly connected with a supplement box. The device can ensure that water vapor condensation cannot be generated, white smoke elimination is achieved, a large amount of fog plume cannot be formed when the smoke is discharged after being treated, the treatment effect on the smoke is good, and treatment on the smoke is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of boiler energy conservation and environmental protection, and in particular to a coal-fired boiler flue gas de-whitening and waste heat recovery device. Background Art

[0002] With the continuous development of society and the continuous advancement of science and technology, technologies related to boiler energy conservation and environmental protection are also constantly improving. At present, coal-fired boilers will generate a large amount of flue gas during use. In order to prevent the direct discharge of flue gas and pollute the environment, the discharged flue gas is generally treated before discharge.

[0003] At present, after the flue gas generated by the use of coal-fired boilers is treated by equipment, there is still a lot of water vapor mixed in the high-temperature flue gas when it is discharged. When the high-temperature flue gas is discharged into an environment with a lower temperature, the hot water vapor quickly condenses into small water droplets or small ice crystals when it encounters cold. These tiny droplets or ice crystals gather together to form a visible mist plume, which has a poor treatment effect on the flue gas and is not conducive to the treatment of the flue gas. Summary of the invention

[0004] The purpose of the present invention is to solve the following shortcomings in the prior art. At present, after the flue gas generated by the use of coal-fired boilers is treated by equipment, there is still a lot of water vapor mixed in the high-temperature flue gas when it is discharged. When the high-temperature flue gas is discharged into an environment with a lower temperature, the hot water vapor quickly condenses into small water droplets or small ice crystals when it is cooled. These tiny droplets or ice crystals gather together to form a visible mist plume, which has a poor treatment effect on the flue gas and is not conducive to the treatment of the flue gas. A coal-fired boiler flue gas dewhitening and waste heat recovery equipment is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A coal-fired boiler flue gas deoxidation and waste heat recovery device, comprising a regeneration tower, a desulfurization tower and an absorption tower, wherein a draft sleeve is fixedly connected to one side of the regeneration tower, a rotating shaft is rotatably connected in the draft sleeve, a plurality of blades and a cam are fixedly connected to the rotating shaft, a cavity is opened in the regeneration tower, a horizontal plate and an inclined plate are fixedly connected in the cavity, an inclined tube is fixedly connected to the horizontal plate and the inclined plate, a hollow floating plate is slidably arranged in the cavity, and a sliding assembly is arranged on the regeneration tower; The desulfurization tower is connected to the regeneration tower and the absorption tower respectively through two connecting pipes. A replenishment box is fixedly connected to one side of the regeneration tower. The replenishment box is connected to the regeneration tower through a replenishment pipe. The bottom of the regeneration tower and the replenishment box are filled with lithium bromide solution. The absorption tower is connected to a fixed box through an exhaust pipe, a partition with a T-shaped cross section and an exhaust pipe are fixedly connected in the fixed box, a drying component is slidably arranged on the partition, and the drying component includes two drying boxes, each of which is fixedly connected to a filter cloth at the bottom, the drying box is filled with calcium oxide, and a rotating component is arranged on the fixed box.

[0006] As a preferred solution, the rotating assembly includes a rotating block installed on the back of the fixed box through a first torsion spring, the cross-section of the rotating block is T-shaped, two sliding openings are provided on the back of the fixed box, a sliding bar is slidably arranged in each of the sliding openings, each of the sliding bars is slidably connected to the rotating block, the backs of the two drying boxes are respectively clamped with the two sliding bars, and an iron sheet is fixedly connected to the rotating block.

[0007] As a preferred solution, the regeneration tower is connected to a first diverter rod via a second torsion spring, one side of the regeneration tower is connected to an extrusion plate via a first spring, and the extrusion plate is connected to the first diverter rod via a first pull rope.

[0008] As a preferred solution, a second diverter rod is rotatably connected in the absorption tower, and a transmission wheel and a plurality of spray heads are fixedly connected to the second diverter rod and the first diverter rod, and the two transmission wheels are connected by a transmission belt.

[0009] As a preferred embodiment, a first pump and a processing shell are fixedly connected to the regeneration tower, the first pump is connected to the first diverter rod through a first hose, and a second pump is fixedly connected to the processing shell and the absorption tower, one of the second pumps is connected to the second diverter rod through a second hose.

[0010] As a preferred solution, a coil and a heating network are fixedly arranged inside the absorption tower, an L-shaped bracket is fixedly connected to one side of the regeneration tower, an air bag is fixedly connected to the L-shaped bracket, an air outlet and an air inlet are provided on the air bag, and a one-way valve is installed in the air outlet and the air inlet, a fixed pipe is fixedly connected to the air bag, a sealed cavity is provided in the fixed box, the fixed pipe is connected to the sealed cavity, a sealing plate is slidably arranged in the sealed cavity, a bending rod is fixedly connected to the sealing plate, a second spring is sleeved on the bending rod, one end of the second spring is fixedly connected to the bending rod, and the other end of the second spring is fixedly connected to the fixed box, a vertical plate is fixedly connected to the bending rod, and a plurality of magnets arranged at equal distances are fixedly connected to the vertical plate.

[0011] As a preferred solution, an air outlet is provided on the fixed box, a sliding rod with an inverted T-shaped cross section is inserted into the air outlet, a sealing ring and a limiting plate are fixedly connected to the sliding rod, the surface of the sealing ring fits with the inner wall of the air outlet, and the sliding rod is connected to the sealing plate through a second pull rope.

[0012] As a preferred embodiment, a rectangular cavity is provided on the inner wall of one side of the cavity, a drainage pipe is fixedly connected to the inner wall of one side of the rectangular cavity, through holes are provided on the upper and lower inner walls of the rectangular cavity, the sliding assembly includes a cross block slidably installed in the through hole, a plurality of elastic sheets are fixedly connected to the cross block, each of the elastic sheets is fitted with the inner wall of the through hole, a connecting hole is provided on the cross block, and one end of the supplementary tube is fitted with the surface of the cross block.

[0013] As a preferred solution, the cross block is connected to the hollow floating plate through a third pull rope, and the rectangular cavity is connected to the hollow cavity.

[0014] As a preferred solution, a round rod is rotatably connected to one side of the regeneration tower, and the surface of the first pull rope is in contact with the surface of the round rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: During the process of lithium bromide solution spraying inside the absorption tower, the lithium bromide solution can also heat the liquid in the coil under the action of heat transfer, which can effectively realize waste heat recovery. The flue gas passes through the calcium oxide and filter cloth in the two drying boxes. The calcium oxide can absorb water vapor in the flue gas well. After the flue gas is discharged from the exhaust pipe, it is pumped to the chimney under the action of the booster pump. Since the flue gas is relatively dry, it can ensure that water vapor condensation will not occur when it is mixed with the air in the external environment, and the flue gas will be de-whitened. After the flue gas is treated, a large amount of fog plume will not be formed when it is discharged. The treatment effect on the flue gas is good, which is conducive to the treatment of the flue gas; When the multiple equally spaced magnets on the vertical plate move downward, the two drying boxes can be frequently moved back and forth. Multiple vertical rods can be fixedly arranged in the fixed box, and the lower ends of the multiple vertical rods are respectively inserted into the drying boxes. During the back and forth movement of the two drying boxes, the calcium oxide powder inside them will move relative to the vertical rods, thereby achieving stirring treatment of the calcium oxide, so that the calcium oxide powder can better contact with water vapor, better remove water vapor in the flue gas, reduce the humidity of the flue gas, and achieve better flue gas dewhitening effect; The second diverter rod deflects back and forth with the first diverter rod, and each spray head deflects back and forth with the first diverter rod and the second diverter rod, respectively, so that the lithium bromide solution can be sprayed into the flue gas better and more fully, so that the flue gas is fully in contact with the lithium bromide solution, so as to more thoroughly remove dust and a large number of impurity ions in the flue gas, and the treatment effect of the flue gas is better, so as to facilitate the subsequent discharge of the flue gas; When the hollow floating plate moves up and down inside the cavity, the cross block can be moved up and down, so that the connecting hole is staggered or aligned with the drainage pipe and the replenishing pipe, and the lithium bromide solution inside the cavity can be automatically replaced, so as to automatically add the purified lithium bromide solution multiple times, which is beneficial for the lithium bromide solution to better remove impurities such as dust in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front structural schematic diagram of a coal-fired boiler flue gas deoxidation and waste heat recovery device proposed by the present invention; Figure 2 This is a schematic diagram of the front internal structure of a coal-fired boiler flue gas deoxidation and waste heat recovery device proposed by the present invention; Figure 3 This is a schematic diagram of the partial internal structure of a coal-fired boiler flue gas deoxidation and waste heat recovery device proposed by the present invention; Figure 4 This is a schematic diagram of the side structure of a coal-fired boiler flue gas deoxidation and waste heat recovery device proposed by the present invention; Figure 5 This is a schematic diagram of the back structure of a coal-fired boiler flue gas deoxidation and waste heat recovery device proposed by the present invention; Figure 6 It is a schematic diagram of the partial structure of the cross block and the drain pipe in the present invention; Figure 7 It is a schematic diagram of the front internal structure of the fixed box in the present invention; Figure 8 It is a schematic diagram of a partial structure of a fixed box in the present invention from a top view; Fig. 9 for Figure 4 A is a schematic diagram of the partially enlarged structure of the middle part; Fig.10 for Figure 2 Schematic diagram of the partially enlarged structure of B.

[0017] In the figure: 1 regeneration tower, 2 desulfurization tower, 3 absorption tower, 4 replenishment box, 5 extrusion plate, 6 round rod, 7 first pull rope, 8 replenishment pipe, 9 second torsion spring, 10 first diverter rod, 11 second diverter rod, 12 transmission belt, 13 vertical plate, 14 bending rod, 15 slide rod, 16 discharge pipe, 17 inclined pipe, 18 hollow floating plate, 19 inclined plate, 20 spray head, 21 coil, 22 horizontal plate, 23 drying box, 24 sealing plate, 25 second pull rope, 26 limit plate, 27 air bag, 28 second pump, 29 treatment shell, 30 rotating block, 31 induced draft sleeve, 32 cam, 33 rotating shaft, 34 discharge pipe, 35 elastic sheet, 36 cross block, 37 third pull rope, 38 connecting hole, 39 first spring, 40 blade, 41 partition, 42 sealing ring, 43 fixed box, 44 slide bar, 45 iron sheet. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Reference Figure 1-Figure 10 A coal-fired boiler flue gas deoxidation and waste heat recovery device comprises a regeneration tower 1, a desulfurization tower 2 and an absorption tower 3, a third pump is installed on the absorption tower 3, a draft sleeve 31 is fixedly connected to one side of the regeneration tower 1, a rotating shaft 33 is rotatably connected in the draft sleeve 31, a plurality of blades 40 and a cam 32 are fixedly connected to the rotating shaft 33, a cavity is opened in the regeneration tower 1, a transverse plate 22 and an inclined plate 19 are fixedly connected in the cavity, an inclined tube 17 is fixedly connected to the transverse plate 22 and the inclined plate 19, a hollow floating plate 18 is slidably arranged in the cavity, a sliding assembly is arranged on the regeneration tower 1, the desulfurization tower 2 is respectively connected to the regeneration tower 1 and the absorption tower 3 through two connecting pipes, a replenishing box 4 is fixedly connected to one side of the regeneration tower 1, the replenishing box 4 is connected to the regeneration tower 1 through a replenishing pipe 8, and the bottom of the regeneration tower 1 and the replenishing box 4 are filled with lithium bromide solution.

[0020] The absorption tower 3 is connected to a fixed box 43 through an exhaust pipe, and a partition 41 with a T-shaped cross section and an exhaust pipe 16 are fixedly connected in the fixed box 43. A drying component is slidably arranged on the partition 41. The drying component includes two drying boxes 23. A filter cloth is fixedly connected to the bottom of each drying box 23. The drying box 23 is filled with calcium oxide, which cannot penetrate the filter cloth. A rotating component is arranged on the fixed box 43.

[0021] The rotating assembly includes a rotating block 30 installed on the back of the fixed box 43 through a first torsion spring. The cross-section of the rotating block 30 is T-shaped. Two sliding openings are formed on the back of the fixed box 43. A slide bar 44 is slidably arranged in each sliding opening. Each slide bar 44 is slidably connected to the rotating block 30. The backs of the two drying boxes 23 are respectively clamped with the two slide bars 44. An iron sheet 45 is fixedly connected to the rotating block 30. A first shunt rod 10 is connected to the regeneration tower 1 through a second torsion spring 9. One side of the regeneration tower 1 is connected with a pressing plate 5 through a first spring 39. The pressing plate 5 is connected to the first shunt rod 10 through a first pull rope 7. A second shunt rod 11 is rotatably connected in the absorption tower 3. Transmission wheels and a plurality of spray heads 20 are fixedly connected to both the second shunt rod 11 and the first shunt rod 10.

[0022] The two transmission wheels are connected by a transmission belt 12. A first pump and a processing housing 29 are fixedly connected to the regeneration tower 1. The first pump is connected to the first shunt rod 10 through a first hose. Second pumps 28 are fixedly connected to both the processing housing 29 and the absorption tower 3. One of the second pumps 28 is connected to the second shunt rod 11 through a second hose. A round rod 6 is rotatably connected to one side of the regeneration tower 1. The surface of the first pull rope 7 is in contact with the surface of the round rod 6. During the rotation of the cam 32, one end of the cam 32 will repeatedly press against and disengage from the pressing plate 5, thereby causing the pressing plate 5 to move back and forth multiple times. When the pressing plate 5 is pressed, it will slide relative to the regeneration tower 1. A sliding groove for the forward and backward movement of the pressing plate 5 is formed on one side of the regeneration tower 1. Since the two ends of the first spring 39 are respectively fixedly connected to the pressing plate 5 and the regeneration tower 1, the first spring 39 is deformed.

[0023] Since one end of the inelastic first pull rope 7 is fixedly connected to the pressing plate 5, and the other end is wound around the first shunt rod 10 and cannot be detached, and the first pull rope 7 is in close contact with the surface of the round rod 6, when the pressing plate 5 moves, it will pull the first pull rope 7. Under the driving action of the first pull rope 7, the first shunt rod 10 rotates simultaneously. Since one end of the second torsion spring 9 is fixedly connected to the first shunt rod 10, and the other end is fixedly connected to the side surface of the regeneration tower 1, the second torsion spring 9 is deformed. When the pressing plate 5 returns to the initial position, under the elastic force of the second torsion spring 9, the first shunt rod 10 will rotate back to the initial position. During the back-and-forth movement of the pressing plate 5, the first shunt rod 10 can be deflected back and forth. Under the combined driving action of the two transmission wheels and the transmission belt 12, the second shunt rod 11 will also reciprocate back and forth with the first shunt rod 10. During the back-and-forth deflection of each spray head 20 along with the first shunt rod 10 and the second shunt rod 11, the lithium bromide solution can be better and more fully sprayed onto the flue gas, enabling the flue gas to come into full contact with the lithium bromide solution, so as to better remove dust, a large number of impurity ions, etc. in the flue gas, and the treatment effect on the flue gas is better, facilitating the subsequent emission of the flue gas.

[0024] The coil 21 and the heating pipe network are fixedly arranged inside the absorption tower 3, an L-shaped bracket is fixedly connected to one side of the regeneration tower 1, an air bag 27 is fixedly connected to the L-shaped bracket, an air outlet and an air inlet are provided on the air bag 27, a check valve is installed in the air outlet and the air inlet, a fixed pipe is fixedly connected to the air bag 27, a sealing chamber is provided in the fixed box 43, the fixed pipe and the sealing chamber are connected, a sealing plate 24 is slidably arranged in the sealing chamber, a bending rod 14 is fixedly connected to the sealing plate 24, a second spring is sleeved on the bending rod 14, one end of the second spring and the bending The folding rod 14 is fixedly connected, and the other end of the second spring is fixedly connected to the fixed box 43. The vertical plate 13 is fixedly connected to the bending rod 14, and a plurality of magnets equidistantly arranged are fixedly connected to the vertical plate 13. During the rotation of the cam 32, it will be squeezed and separated from the airbag 27 for many times. Only one side surface of the airbag 27 is fixedly connected to the L-shaped bracket, and the one-way valve can effectively prevent the gas inside the fixed tube from flowing back into the airbag 27. The outside air can enter the airbag 27 through the air inlet, because the two ends of the fixed tube are respectively fixedly connected to the airbag 27 and the fixed box 43.

[0025] Each time the airbag 27 is squeezed by the squeezing plate 5, the air inside it will be discharged into the sealed cavity through the fixed tube. Since the sealing plate 24 has good sealing performance when connected to the sealed cavity, the air will push the sealing plate 24 to move downward in the sealed cavity. At the same time, the bending rod 14 slides relative to the fixed box 43 and the connection is sealed. The second spring is deformed, and the vertical plate 13 moves downward together with the bending rod 14. During this process, multiple magnets (not shown) on the vertical plate 13 that are vertically equidistantly arranged will fit and disengage with the iron sheet 45 in turn. When each magnet fits and moves downward with the iron sheet 45, the iron sheet 45 will also deflect downward under the action of attraction, and the rotating block 30 will rotate relative to the fixed box 43 at the same time.

[0026] Since one end of the first torsion spring (not shown) is fixedly connected to the rotating block 30 and the other end of the first torsion spring is fixedly connected to the fixed box 43, the first torsion spring is deformed. Since one end of each slide bar 44 is slidably arranged on the rotating block 30 and slides within the corresponding slide opening, and the end of the slide bar 44 passing through the slide opening is clamped with the drying box 23. During the rotation of the rotating block 30, under the driving action of the slide bar 44, the two drying boxes 23 will slide along the slide opening. When the iron sheet 45 is not in contact with the magnet and there is a large distance and it is completely located between two adjacent magnets, the rotating block 30 will rotate back under the elastic force of the first torsion spring. Repeating the above process can make the two drying boxes 23 move back and forth frequently. A plurality of vertical rods can be fixedly arranged in the fixed box 43, and the lower ends of the plurality of vertical rods are respectively inserted into the drying box 23. During the back-and-forth movement of the two drying boxes 23, the calcium oxide powder inside them will move relative to the vertical rods, thereby realizing the stirring treatment of calcium oxide, facilitating the better contact of calcium oxide powder with water vapor, better removing the water vapor in the flue gas, reducing the humidity of the flue gas, and achieving a better effect of whitening the flue gas.

[0027] An air outlet is formed in the fixed box 43, and a slide rod 15 with an inverted T-shaped cross-section is inserted into the air outlet. An expansion rod can be fixedly installed on the fixed box 43, and the telescopic end of the expansion rod is fixedly connected to the slide rod 15 to limit the slide rod 15 and effectively prevent the slide rod 15 from deflecting. A sealing ring 42 and a limiting piece 26 are fixedly connected to the slide rod 15. The surface of the sealing ring 42 is attached to the inner wall of the air outlet. The slide rod 15 is connected to the sealing plate 24 through a second pull rope 25. In the initial state, the upper surface of the sealing plate 24 is attached to the lower end surface of the slide rod 15. At this time, the sealing ring 42 with an isosceles trapezoid cross-section seals and blocks the air outlet, and the rubber sealing ring 42 has the maximum deformation. At this time, the inelastic second pull rope 25 is in a relaxed state. The two ends of the second pull rope 25 are respectively fixedly connected to the slide rod 15 and the sealing plate 24. As the air inside the sealing cavity continuously increases, during the downward movement of the sealing plate 24 inside the sealing cavity, the second pull rope 25 will be gradually tightened. When the second pull rope 25 is tightened and the sealing plate 24 continues to move downward, under the driving action of the second pull rope 25, the slide rod 15 will move downward. When the sealing ring 42 is separated from the through hole, the slide rod 15 will move downward under the action of gravity until the surface of the limiting piece 26 contacts the upper surface of the fixed box 43. At this time, there is a large gap between the slide rod 15 with an inverted T-shaped cross-section and the air outlet, and the air on the inner wall of the sealing cavity can all be discharged through the air outlet. The sealing plate 24 will move upward to reset under the action of the second spring. When the sealing plate 24 moves upward, it will move against the lower end surface of the slide rod 15, thereby pushing the slide rod 15 upward until the sealing ring 42 seals and blocks the air outlet again.

[0028] A rectangular cavity is provided on the inner wall of one side of the cavity, a drainage pipe 34 is fixedly connected to the inner wall of one side of the rectangular cavity, through holes are provided on the upper and lower inner walls of the rectangular cavity, the sliding assembly includes a cross block 36 slidably installed in the through hole, a plurality of elastic sheets 35 are fixedly connected to the cross block 36, each elastic sheet 35 is fitted with the inner wall of the through hole, a connecting hole 38 is provided on the cross block 36, one end of the replenishing pipe 8 is fitted with the surface of the cross block 36, the cross block 36 is connected to the hollow floating plate 18 through a third pull rope 37, and the rectangular cavity is provided with a plurality of elastic sheets 35 fixedly connected to the cross block 36, each elastic sheet 35 is fitted with the inner wall of the through hole, a connecting hole 38 is provided on the cross block 36, one end of the replenishing pipe 8 is fitted with the surface of the cross block 36, and the cross block 36 is connected to the hollow floating plate 18 through a third pull rope 37. The shaped cavity is connected to the hollow cavity. In the initial state, the end faces of the discharge pipe 34 and the replenishing pipe 8 are respectively in close contact with the two side surfaces of the cross block 36, and the connection sealing is good. When the lithium bromide solution at the bottom of the cavity is pumped into the first diverter rod 10 and gradually decreases, the hollow floating plate 18 will move vertically downward under the action of gravity and will always be located at the highest liquid level of the lithium bromide solution. During the downward movement of the hollow floating plate 18, it will gradually move against the upper end surface of the cross block 36, and then push the cross block 36 to move downward together.

[0029] During the relative sliding of the cross block 36, the drain pipe 34 and the replenishing pipe 8, the connecting hole 38 will gradually move to the middle position of the drain pipe 34 and the replenishing pipe 8. At this time, the lithium bromide solution in the replenishing box 4 will be discharged into the cavity through the replenishing pipe 8, the connecting hole 38 and the drain pipe 34 in sequence. As the lithium bromide solution at the bottom of the cavity continues to increase, the hollow floating plate 18 will be pushed up. At this time, each elastic sheet 35 is always in close contact with the inner wall of the through hole. When the hollow floating plate 18 moves up to a certain height, the inelastic third pull rope 37 will be tightened, and the hollow floating plate 18 will continue to move. During the upward movement, since the two ends of the third pull rope 37 are fixedly connected to the cross block 36 and the hollow floating plate 18 respectively, under the transmission action of the third pull rope 37, the cross block 36 will move up and the connecting hole 38 will be staggered with the drain pipe 34 and the replenishing pipe 8 again, that is, the lithium bromide solution inside the replenishing box 4 cannot be discharged into the cavity. At this time, the elastic sheet 35 is still in contact with the inner wall of the through hole. Repeating the above process can realize the automatic replacement of the lithium bromide solution in the cavity, so as to automatically add the purified lithium bromide solution multiple times, which is beneficial for the lithium bromide solution to better remove impurities such as dust in the flue gas.

[0030] In the present invention, when in use, the servo motor drives the rotating shaft 33 to rotate, thereby driving the plurality of blades 40 and the cam 32 to rotate together. During the rotation of the plurality of blades 40, the high-temperature flue gas of 120 degrees Celsius can be transported to the lithium bromide solution of 67 degrees Celsius at the bottom of the inverted convex cavity. The light-weight hollow floating plate 18 always floats above the lithium bromide solution, and the sealing performance when the cross plate 22 is connected to the inner wall of the cavity is good. The flue gas can then pass through the hollow floating plate 18 and be transported to the top of the inclined plate 19 through the inclined pipe 17, and the flue gas will be ejected from the inclined pipe 17 to the inclined plate 19 On the surface of the inclined plate 19, the flue gas will disperse under the blocking effect of the inclined plate 19. Since the two ends of the first hose are fixedly connected to the first diverter rod 10 and the first pump respectively, and the first hose has good sealing when connected to the regeneration tower 1, the first pump can work at the same time to transport the lithium bromide solution at the bottom of the cavity to the inside of the first diverter rod 10 through the first hose. The first diverter rod 10 is located inside the regeneration tower 1. A diverter cavity (not shown) connected to the spray head 20 is opened inside the first diverter rod 10. The lithium bromide solution will be sprayed out through each spray head 20, so that the lithium bromide solution and the flue gas are in better and more complete contact.

[0031] In this process, the temperature of the flue gas will decrease from 120 degrees Celsius to 80 degrees Celsius under the action of heat transfer, while the temperature of the lithium bromide solution will increase from 67 degrees Celsius to 80 degrees Celsius. After the lithium bromide solution inside the cavity comes into contact with the flue gas, a large amount of sulfurous acid, sulfuric acid, dust, and a large number of impurity ions are dissolved therein. The lithium bromide solution that falls on the inclined plate 19 will be discharged into the interior of the processing shell 29. The processing shell 29 can purify the lithium bromide solution, and the processing shell 29 has a good thermal insulation effect, which can effectively prevent the temperature of the lithium bromide solution from dropping significantly.

[0032] After that, the flue gas can be transported to the desulfurization tower 2 through the connecting pipe for desulfurization treatment under the action of the induced draft fan (not shown), and then transported to the inside of the absorption tower 3 through another connecting pipe. At this time, after the flue gas is desulfurized, its temperature will drop from 80 degrees Celsius to 52 degrees Celsius. Since the two ends of the second hose are respectively fixedly connected to the second diverter rod 11 and the second pump 28, the second pump 28 is connected to the treatment shell 29 through the suction pipe, and the second hose is well sealed when connected to the absorption tower 3. At the same time, the second pump 28 will treat the brominated gas purified inside the treatment shell 29. The lithium solution is pumped into the interior of the second diverter rod 11 through the second hose. The second diverter rod 11 located inside the absorption tower 3 also has a diverter chamber (not shown) connected to the spray head 20. The lithium bromide solution is sprayed out through each spray head 20, so that the lithium bromide solution and the flue gas are in more sufficient contact. At this time, the temperature of the lithium bromide solution is about seventy-nine degrees Celsius. The lithium bromide solution contacts the flue gas, and under the action of heat transfer, the temperature of the flue gas can be increased to seventy-three degrees Celsius. The lithium bromide solution can be pumped into the replenishment box 4 under the action of the third pump.

[0033] A coil 21 is arranged in the absorption tower 3. There is circulating water with a temperature of 60 degrees Celsius circulating in the coil 21. The heating pipe network supplies heating return water of 60 degrees Celsius to the coil 21. During the process of the lithium bromide solution being sprayed inside the absorption tower 3, the lithium bromide solution can also heat the liquid in the coil 21 under the action of heat transfer, so that the internal liquid temperature is increased from 60 degrees Celsius to 69 degrees Celsius. The heated liquid can be discharged from the coil 21 for use, which can effectively realize waste heat recovery. After that, the flue gas can be discharged into the interior of the fixed box 43 under the action of the induced draft fan (not shown), and pass through the calcium oxide and filter cloth in the two drying boxes 23 in turn. The calcium oxide can better absorb water vapor in the flue gas. After the flue gas is discharged from the exhaust pipe 16, since the flue gas is relatively dry, when it is mixed with the air in the external environment, it can be ensured that water vapor condensation will not occur, thereby realizing the whitening of the flue gas. When the flue gas is discharged after treatment, a large amount of fog plume will not be formed, which has a good treatment effect on the flue gas and is conducive to the treatment of the flue gas.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coal-fired boiler flue gas desulfurization and waste heat recovery device, comprising a regeneration tower (1), a desulfurization tower (2) and an absorption tower (3), characterized in that: A draft sleeve (31) is fixedly connected to one side of the regeneration tower (1), a rotating shaft (33) is rotatably connected inside the draft sleeve (31), a plurality of blades (40) and a cam (32) are fixedly connected to the rotating shaft (33), a cavity is provided inside the regeneration tower (1), a horizontal plate (22) and an inclined plate (19) are fixedly connected inside the cavity, an inclined tube (17) is fixedly connected to the horizontal plate (22) and the inclined plate (19), a hollow floating plate (18) is slidably provided inside the cavity, and a sliding assembly is provided on the regeneration tower (1); The desulfurization tower (2) is connected to the regeneration tower (1) and the absorption tower (3) respectively through two connecting pipes; a replenishment box (4) is fixedly connected to one side of the regeneration tower (1); the replenishment box (4) is connected to the regeneration tower (1) through a replenishment pipe (8); the bottom of the regeneration tower (1) and the replenishment box (4) are filled with lithium bromide solution; The absorption tower (3) is connected to a fixed box (43) via an exhaust pipe, a partition (41) having a T-shaped cross section and an exhaust pipe (16) are fixedly connected inside the fixed box (43), a drying component is slidably arranged on the partition (41), the drying component comprises two drying boxes (23), a filter cloth is fixedly connected to the bottom of each drying box (23), the drying box (23) is filled with calcium oxide, and a rotating component is arranged on the fixed box (43).

2. A coal-fired boiler flue gas deoxidation and waste heat recovery device according to claim 1, characterized in that: The rotating assembly comprises a rotating block (30) mounted on the back of the fixed box (43) via a first torsion spring, the cross section of the rotating block (30) being arranged in a T-shape, two sliding openings being arranged on the back of the fixed box (43), a sliding bar (44) being slidably arranged in each of the sliding openings, each of the sliding bars (44) being slidably connected to the rotating block (30), the backs of the two drying boxes (23) being respectively engaged with the two sliding bars (44), and an iron sheet (45) being fixedly connected to the rotating block (30).

3. The coal-fired boiler flue gas deoxidation and waste heat recovery equipment according to claim 1, characterized in that: The regeneration tower (1) is connected to a first diverter rod (10) via a second torsion spring (9), one side of the regeneration tower (1) is connected to an extrusion plate (5) via a first spring (39), and the extrusion plate (5) is connected to the first diverter rod (10) via a first pull rope (7).

4. A coal-fired boiler flue gas deoxidation and waste heat recovery device according to claim 3, characterized in that: A second diverter rod (11) is rotatably connected inside the absorption tower (3), and a transmission wheel and a plurality of spray heads (20) are fixedly connected to the second diverter rod (11) and the first diverter rod (10), and the two transmission wheels are connected via a transmission belt (12).

5. A coal-fired boiler flue gas decolorization and waste heat recovery device according to claim 4, characterized in that: The regeneration tower (1) is fixedly connected to a first pump and a treatment shell (29), the first pump being connected to the first diverter rod (10) via a first hose, and the treatment shell (29) and the absorption tower (3) are both fixedly connected to a second pump (28), one of the second pumps (28) being connected to the second diverter rod (11) via a second hose.

6. The coal-fired boiler flue gas deoxidation and waste heat recovery equipment according to claim 1, characterized in that: A coil (21) and a heat supply network are fixedly arranged inside the absorption tower (3); an L-shaped bracket is fixedly connected to one side of the regeneration tower (1); an air bag (27) is fixedly connected to the L-shaped bracket; an air outlet and an air inlet are provided on the air bag (27); both the air outlet and the air inlet are provided with a one-way valve; a fixed pipe is fixedly connected to the air bag (27); a sealed cavity is provided in the fixed box (43); the fixed pipe is connected to the sealed cavity; a sealing plate (24) is slidably arranged in the sealed cavity; a bending rod (14) is fixedly connected to the sealing plate (24); a second spring is sleeved on the bending rod (14); one end of the second spring is fixedly connected to the bending rod (14); the other end of the second spring is fixedly connected to the fixed box (43); a vertical plate (13) is fixedly connected to the bending rod (14); a plurality of magnets arranged at equal distances are fixedly connected to the vertical plate (13).

7. A coal-fired boiler flue gas deoxidation and waste heat recovery device according to claim 6, characterized in that: The fixed box (43) is provided with an air outlet, a sliding rod (15) having an inverted T-shaped cross section is inserted into the air outlet, a sealing ring (42) and a limiting plate (26) are fixedly connected to the sliding rod (15), a surface of the sealing ring (42) is in contact with an inner wall of the air outlet, and the sliding rod (15) is connected to the sealing plate (24) via a second pull rope (25).

8. The coal-fired boiler flue gas deoxidation and waste heat recovery equipment according to claim 1, characterized in that: A rectangular cavity is formed on one inner wall of the cavity, a drainage pipe (34) is fixedly connected to one inner wall of the rectangular cavity, through holes are formed on the upper and lower inner walls of the rectangular cavity, the sliding assembly comprises a cross block (36) slidably mounted in the through hole, a plurality of elastic sheets (35) are fixedly connected to the cross block (36), each of the elastic sheets (35) is in contact with the inner wall of the through hole, a connecting hole (38) is formed on the cross block (36), and one end of the replenishing pipe (8) is in contact with the surface of the cross block (36).

9. A coal-fired boiler flue gas deoxidation and waste heat recovery device according to claim 8, characterized in that: The cross block (36) is connected to the hollow floating plate (18) via a third pull rope (37), and the rectangular cavity is connected to the hollow cavity.

10. The coal-fired boiler flue gas deoxidation and waste heat recovery equipment according to claim 3, characterized in that: A round rod (6) is rotatably connected to one side of the regeneration tower (1), and the surface of the first pull rope (7) is in contact with the surface of the round rod (6).

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