Chemical plant flue gas purification treatment system and treatment method

Abstract

The present invention relates to the technical field of waste gas treatment, and specifically to a fume purification treatment system and treatment method for a chemical plant. It comprises a cylinder, the upper end of the cylinder is rotatably sealed and connected with a liquid inlet pipe, a driving assembly for driving the liquid inlet pipe to rotate is arranged on the cylinder, a liquid inlet assembly is rotatably arranged on the upper end of the liquid inlet pipe, a fixed rod vertically connected to the lower end of the liquid inlet pipe is fixedly connected, a ring is fixed at one end of the fixed rod away from the liquid inlet pipe, a second cavity and a third cavity arranged up and down are opened in the ring, the second cavity is connected with the first cavity, the third cavity is connected with the fifth cavity, and a spray assembly is rotatably arranged on the ring. When treating the fume, the ring can rotate in the cylinder, and at the same time, the rotating sleeve and the spray ring can rotate, so that the treatment liquid can be evenly sprayed into the cylinder, so that the treatment liquid can effectively treat the fume.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a chemical plant fume purification treatment system and a treatment method. Background Art

[0002] The flue gas from chemical plants is a mixture of gases and smoke, and is the main cause of atmospheric pollution. The composition of the flue gas from chemical plants is very complex. Gases include water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbon mixtures, and nitrogen oxides, etc. The smoke includes fuel ash, coal particles, oil droplets, and high-temperature cracking products, etc. These substances enter the human body through the respiratory tract through different pathways. Some of them cause direct harm, while others have an accumulation effect, which will more seriously endanger human health.

[0003] The existing chemical plant flue gas dust removal and purification device has poor dust removal and purification effect on the chemical plant flue gas due to the clogging of the filter screen by dust during long-term use, which increases the cost of chemical plant flue gas dust removal and purification and pollutes the atmospheric environment. Summary of the invention

[0004] The technical problem to be solved by the present invention is a flue gas purification system and a flue gas treatment method which can effectively reduce impurities such as smoke dust in the flue gas.

[0005] In order to achieve the above object, the technical solution provided by the present invention is:

[0006] The flue gas purification treatment system of a chemical plant comprises a cylinder, the upper end of the cylinder is fixedly connected with an outlet pipe, the lower end of the cylinder is fixedly connected with a discharge pipe, a valve is installed on the discharge pipe, the lower part of the cylinder is fixedly connected with an inlet pipe, the upper end of the cylinder is rotatably sealed and connected with a liquid inlet pipe, a driving component for driving the liquid inlet pipe to rotate is arranged on the cylinder, a fourth cavity and a sixth cavity are arranged in the liquid inlet pipe, a liquid inlet component is rotatably arranged at the upper end of the liquid inlet pipe, two liquid inlet ends of the liquid inlet component are respectively connected with the fourth cavity and the sixth cavity, the lower end of the liquid inlet pipe is located in the cylinder, the lower end of the liquid inlet pipe is fixedly connected with a fixed rod perpendicular to it, and the fixed rod is arranged inside the fixed rod. A first cavity and a fifth cavity are provided which are arranged vertically, the fourth cavity is connected to the first cavity, the fifth cavity is connected to the sixth cavity, a ring is fixed to the end of the fixing rod away from the liquid inlet pipe, a second cavity and a third cavity are provided vertically in the ring, the second cavity is connected to the first cavity, the third cavity is connected to the fifth cavity, a spray assembly is rotatably arranged on the ring, a driving unit is provided on the ring, the driving unit is connected to the spray assembly, a second water cavity and a first water cavity distributed vertically are provided in the spray assembly, the second water cavity is connected to the second cavity, and the first water cavity is connected to the third cavity.

[0007] Specifically, a first partition is fixed inside the liquid inlet pipe, and the first partition divides the inside of the liquid inlet pipe into a fourth cavity and a sixth cavity.

[0008] Specifically, the driving assembly includes a first motor fixed on the upper end of the cylinder, a gear is coaxially fixed on the output shaft of the first motor, a gear ring is coaxially fixed on the liquid inlet pipe above the cylinder, and the gear ring is meshed with the gear.

[0009] Specifically, the liquid inlet assembly includes three fixed rings fixed at the upper end of the liquid inlet pipe, the fixed rings are concentric with the liquid inlet pipe, the three fixed rings are linearly arrayed along the axial direction of the liquid inlet pipe, a rotating ring is rotatably sealed and connected between two adjacent fixed rings, a first through hole is opened on the liquid inlet pipe on the inner side of the upper rotating ring, a second through hole is opened on the liquid inlet pipe on the inner side of the lower rotating ring, the first through hole is connected to the sixth cavity, the second through hole is connected to the fourth cavity, an upper water inlet pipe is fixed on the upper rotating ring, the upper water inlet pipe is connected to the first through hole, and a lower water inlet pipe is fixed on the lower rotating ring, the lower water inlet pipe is connected to the second through hole.

[0010] Specifically, the interior of the fixing rod is hollow, a second partition is fixed inside the fixing rod, the second partition divides the interior of the fixing rod into a first cavity and a fifth cavity, and the second partition is fixedly connected to the first partition.

[0011] Specifically, the ring member includes an arc-shaped first fixing frame and a plurality of arc-shaped second fixing frames, the first fixing frame and the second fixing frame are each provided with a second cavity and a third cavity arranged up and down, the first fixing frame is fixedly connected to the fixing rod, the second cavity of the first fixing frame is communicated with the first cavity of the fixing rod, and the third cavity of the first fixing frame is communicated with the fifth cavity of the fixing rod; the spray assembly includes a rotating sleeve, the rotating sleeve is rotatably arranged at one end of the first fixing frame, and a plurality of spray holes are evenly distributed on the circumference of the rotating sleeve, a fixed disk is fixed to the other end of the first fixing frame, and the fixed disk on the first fixing frame is provided with two openings, and the two openings are respectively communicated with the second cavity and the third cavity of the first fixing frame; fixed disks are fixed to both ends of the second fixing frame, and the fixed disk on the second fixing frame is provided with two slots, and the two slots are respectively connected to the first The second cavity and the third cavity of the two fixed frames are connected; the two adjacent fixed disks are fixedly connected by a third partition, and a spray ring is rotatably sealed between the two adjacent fixed disks, the third partition in the spray ring is in rotatable sealing contact with the inner wall of the spray ring, and a plurality of spray holes are provided on the circumference of the spray ring; the rotating sealing sleeve of the rotating sleeve is arranged on the fixed disk on one side thereof, the third partition is fixed on the fixed disk in the rotating sleeve, and the third partition in the rotating sleeve is in rotatable sealing contact with the inner wall of the rotating sleeve; the third partition is located between the second cavity and the third cavity, the third partition in the spray ring divides the interior of the spray ring into a second water cavity and a first water cavity arranged up and down, and the third partition in the rotating sleeve divides the interior of the rotating sleeve into a second water cavity and a first water cavity arranged up and down; the rotating sleeve and its adjacent spray ring and the two adjacent spray rings are connected by a movable connection component.

[0012] Specifically, the movable connection assembly includes a first connecting rod, both ends of the first connecting rod are fixed with a first hinge shaft, the first hinge shaft is rotatably connected to a second connecting rod in an inverted L shape, one end of the second connecting rod is rotatably connected to the first hinge shaft, and the other end of the second connecting rod is rotatably connected to the second hinge shaft, and the axes of the first hinge shaft and the second hinge shaft are perpendicular; when the rotating sleeve is connected to the adjacent spray ring, the two second hinge shafts of the movable connection assembly are respectively fixed at the lower end of the rotating sleeve and the lower end of the spray ring, and when two adjacent spray rings are connected, the two second hinge shafts of the movable connection assembly are respectively fixed at the lower ends of the two spray rings, and the first connecting rod is located on the inner side of the ring.

[0013] Specifically, the driving unit includes a second motor, which is fixed in one end of a first fixing frame on one side of the rotating sleeve, and an output shaft of the second motor is fixedly connected to the rotating sleeve.

[0014] When treating the flue gas, start the driving component, which drives the liquid inlet pipe, the fixed rod and the ring to rotate; start the driving unit, which drives the spray component to rotate; introduce the treatment liquid into the fourth cavity and the sixth cavity respectively through the two liquid inlet ends of the liquid inlet component, so that the pressure of the treatment liquid in the fourth cavity is less than the pressure of the treatment liquid in the sixth cavity, that is, the pressure of the treatment liquid in the second cavity is less than the pressure of the treatment liquid in the third cavity; when the spray component rotates, the spray component can spray the treatment liquid in the second cavity upward in the cylinder in a divergent shape, and the spray component can spray the treatment liquid in the third cavity downward in the cylinder in a divergent shape; the flue gas enters the cylinder through the inlet pipe, and the treatment liquid sprayed into the cylinder is fully mixed with the flue gas and reacts with the harmful substances in the flue gas, so that the treatment liquid can reduce the content of harmful substances in the flue gas, and at the same time After the smoke and other impurities in the flue gas are mixed with the treatment liquid, they can descend to the lower end of the cylinder along with the treatment liquid, thereby reducing the content of impurities such as smoke and dust in the flue gas; the smoke treated by the treatment liquid is discharged from the outlet pipe to the outside of the cylinder; the treatment liquid in the cylinder can be discharged by opening the valve on the discharge pipe; since the pressure of the treatment liquid in the second cavity is lower than the pressure of the treatment liquid in the third cavity, the flow rate of the spray liquid sprayed to the lower part of the cylinder is greater than the flow rate of the spray liquid sprayed to the lower part of the cylinder. By increasing the flow rate of the spray liquid sprayed to the lower part of the cylinder, the upward speed of the smoke in the cylinder can be reduced, the reaction time of the smoke and the treatment liquid in the cylinder can be increased, and the treatment effect of the treatment liquid on the smoke can be improved; by reducing the flow rate of the spray liquid sprayed to the upper part of the cylinder, it can be avoided that the spray liquid sprayed to the upper part of the cylinder increases the flow rate of the smoke in the cylinder due to excessive flow rate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When treating the flue gas, the ring can rotate in the cylinder. At the same time, the rotating sleeve and the spray ring can rotate, so that the treatment liquid can be evenly sprayed into the cylinder, so that the treatment liquid can effectively treat the flue gas.

[0017] 2. Since the pressure of the treatment liquid in the second cavity is lower than the pressure of the treatment liquid in the third cavity, the flow rate of the spray liquid sprayed downward inside the cylinder is greater than the flow rate of the spray liquid sprayed downward inside the cylinder. By increasing the flow rate of the spray liquid sprayed downward inside the cylinder, the upward speed of the flue gas in the cylinder can be reduced, the reaction time between the flue gas and the treatment liquid in the cylinder can be increased, and the treatment effect of the treatment liquid on the flue gas can be improved; by reducing the flow rate of the spray liquid sprayed upward inside the cylinder, it can be avoided that the spray liquid sprayed upward inside the cylinder increases the flow rate of the flue gas in the cylinder due to excessive flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the cylinder.

[0019] Figure 2 for Figure 1 Magnified view of area A.

[0020] Figure 3 It is a cross-sectional view of the cylinder.

[0021] Figure 4 Schematic diagram of the connection between the liquid inlet pipe and the fixed rod.

[0022] Figure 5 for Figure 4 Magnified view of area B.

[0023] Figure 6 for Figure 4 Magnified view of area C.

[0024] Figure 7 It is a cross-sectional view of the liquid inlet pipe and the fixing rod.

[0025] Figure 8 for Figure 7 Magnified view of area D in the middle.

[0026] Fig. 9 for Figure 7 Magnified view of area E in the middle.

[0027] Fig.10 for Figure 7 Magnified view of region F.

[0028] Fig.11 for Figure 7 Magnified view of the middle G region.

[0029] Fig.12 A cross-sectional view of the spray ring.

[0030] Fig.13 for Fig.12 Magnified view of the middle H region.

[0031] The names of the parts in the attached drawings are: 1. Cylinder; 2. Inlet pipe; 3. Outlet pipe; 4. Gear ring; 5. Liquid inlet pipe; 6. Rotating ring; 7. Fixed ring; 8. Upper water inlet pipe; 9. Lower water inlet pipe; 10. Gear; 11. First motor; 12. Drain pipe; 13. Valve; 14. First fixing frame; 15. Fixing rod; 16. Second fixing frame; 17. First connecting rod; 18. Spray ring; 19. Fixing plate; 20. Second motor; 21. Spray hole; 22. Rotating sleeve; 23. First cavity; 24. First hinge shaft; 25. Second connecting rod; 26. Second cavity; 27. Third cavity; 28. First through hole; 29. ​​First partition; 30. Second through hole; 31. Fourth cavity; 32. Second partition; 33. Second hinge shaft; 34. Third partition; 35. First water cavity; 36. Second water cavity; 37. Fifth cavity; 38. Sixth cavity. DETAILED DESCRIPTION

[0032] 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.

[0033] like Figure 1 and Figure 3 As shown, the flue gas purification system of a chemical plant includes a cylinder 1, the upper end of the cylinder 1 is fixedly connected to an outlet pipe 3, the lower end of the cylinder 1 is fixedly connected to a discharge pipe 12, a valve 13 is installed on the discharge pipe 12, and the lower part of the cylinder 1 is fixedly connected to an inlet pipe 2.

[0034] The upper end of the cylinder 1 is rotatably and sealingly connected with a liquid inlet pipe 5 , and a driving component for driving the liquid inlet pipe 5 to rotate is arranged on the cylinder 1 .

[0035] like Figure 2 As shown, the driving assembly includes a first motor 11 fixed to the upper end of the cylinder 1, a gear 10 is coaxially fixed to the output shaft of the first motor 11, a gear ring 4 is coaxially fixed to the liquid inlet pipe 5 above the cylinder 1, and the gear ring 4 meshes with the gear 10.

[0036] like Figure 7 , Fig. 9 and Fig.10 As shown, a fourth cavity 31 and a sixth cavity 38 are provided in the liquid inlet pipe 5. Specifically, a first partition plate 29 is fixed in the liquid inlet pipe 5, and the first partition plate 29 divides the inside of the liquid inlet pipe 5 into the fourth cavity 31 and the sixth cavity 38.

[0037] like Figure 7 and Fig. 9As shown, a liquid inlet assembly is rotatably provided at the upper end of the liquid inlet pipe 5, and the two liquid inlet ends of the liquid inlet assembly are respectively connected to the fourth cavity 31 and the sixth cavity 38. Specifically, the liquid inlet assembly includes three fixed rings 7 fixed to the upper end of the liquid inlet pipe 5, the fixed rings 7 are concentric with the liquid inlet pipe 5, and the three fixed rings 7 are linearly arrayed along the axial direction of the liquid inlet pipe 5. A rotating ring 6 is rotatably sealed and connected between two adjacent fixed rings 7, a first through hole 28 is provided on the liquid inlet pipe 5 on the inner side of the upper rotating ring 6, and a second through hole 30 is provided on the liquid inlet pipe 5 on the inner side of the lower rotating ring 6, the first through hole 28 is connected to the sixth cavity 38, and the second through hole 30 is connected to the fourth cavity 31. An upper water inlet pipe 8 is fixed on the upper rotating ring 6, and the upper water inlet pipe 8 is connected to the first through hole 28, and a lower water inlet pipe 9 is fixed on the lower rotating ring 6, and the lower water inlet pipe 9 is connected to the second through hole 30.

[0038] like Figure 3 , Figure 7 and Fig.10 As shown, the lower end of the liquid inlet pipe 5 is located in the cylinder 1, and the lower end of the liquid inlet pipe 5 is fixedly connected with a fixed rod 15 perpendicular thereto, and the fixed rod 15 is provided with a first cavity 23 and a fifth cavity 37 arranged up and down. Specifically, the fixed rod 15 is hollow inside, and a second partition 32 is fixed inside the fixed rod 15, and the second partition 32 divides the inside of the fixed rod 15 into a first cavity 23 and a fifth cavity 37, and the second partition 32 is fixedly connected to the first partition 29. The fourth cavity 31 is connected to the first cavity 23, and the fifth cavity 37 is connected to the sixth cavity 38.

[0039] like Figure 2-12 As shown, a ring is fixed to one end of the fixing rod 15 away from the liquid inlet pipe 5 , and a second cavity 26 and a third cavity 27 arranged up and down are opened in the ring. The second cavity 26 is connected to the first cavity 23 , and the third cavity 27 is connected to the fifth cavity 37 .

[0040] A spray assembly is rotatably arranged on the ring, and a driving unit is arranged on the ring, and the driving unit is connected to the spray assembly. A second water cavity 36 and a first water cavity 35 are arranged in the spray assembly, and the second water cavity 36 is connected to the second cavity 26, and the first water cavity 35 is connected to the third cavity 27.

[0041] like Figure 3 , Figure 8 and Fig.11 As shown, the ring member includes an arc-shaped first fixing frame 14 and a plurality of arc-shaped second fixing frames 16, and the first fixing frame 14 and the second fixing frame 16 are each provided with a second cavity 26 and a third cavity 27 arranged up and down, the first fixing frame 14 is fixedly connected to the fixing rod 15, the second cavity 26 of the first fixing frame 14 is communicated with the first cavity 23 of the fixing rod 15, and the third cavity 27 of the first fixing frame 14 is communicated with the fifth cavity 37 of the fixing rod 15.

[0042] like Figure 4 , Figure 5 , Figure 6 , Fig.12 and Fig.13 As shown, the spray assembly includes a rotating sleeve 22, which is rotatably arranged at one end of the first fixed frame 14, and a plurality of spray holes 21 are evenly distributed around the circumference of the rotating sleeve 22. A fixed plate 19 is fixed at the other end of the first fixed frame 14, and the fixed plate 19 on the first fixed frame 14 has two openings, which are respectively connected to the second cavity 26 and the third cavity 27 of the first fixed frame 14.

[0043] A fixing plate 19 is fixed to both ends of the second fixing frame 16 . The fixing plate 19 on the second fixing frame 16 has two slots, which are connected to the second cavity 26 and the third cavity 27 of the second fixing frame 16 , respectively.

[0044] Two adjacent fixed disks 19 are fixedly connected by a third partition plate 34, and a spray ring 18 is rotatably sealed between the two adjacent fixed disks 19. The third partition plate 34 in the spray ring 18 is in rotatably sealed contact with the inner wall of the spray ring 18, and a plurality of spray holes 21 are opened around the circumference of the spray ring 18.

[0045] The rotating sealing sleeve of the rotating sleeve 22 is arranged on the fixed disk 19 on one side thereof. A third partition plate 34 is fixed on the fixed disk 19 in the rotating sleeve 22 . The third partition plate 34 in the rotating sleeve 22 is in rotating sealing contact with the inner wall of the rotating sleeve 22 .

[0046] The third partition plate 34 is located between the second cavity 26 and the third cavity 27. The third partition plate 34 in the spray ring 18 divides the interior of the spray ring 18 into a second water cavity 36 and a first water cavity 35 arranged vertically, and the third partition plate 34 in the rotating sleeve 22 divides the interior of the rotating sleeve 22 into a second water cavity 36 and a first water cavity 35 arranged vertically.

[0047] The rotating sleeve 22 and the adjacent spray ring 18 as well as the two adjacent spray rings 18 are connected via a movable connection assembly.

[0048] The movable connection assembly includes a first connecting rod 17, both ends of which are fixed with a first hinge shaft 24, and the first hinge shaft 24 is rotatably connected to a second connecting rod 25 in an inverted L shape, one end of the second connecting rod 25 is rotatably connected to the first hinge shaft 24, and the other end of the second connecting rod 25 is rotatably connected to the second hinge shaft 33, and the axes of the first hinge shaft 24 and the second hinge shaft 33 are perpendicular.

[0049] When the rotating sleeve 22 is connected to the adjacent spray ring 18 , the two second hinge shafts 33 of the movable connection assembly are fixed to the lower end of the rotating sleeve 22 and the lower end of the spray ring 18 , respectively.

[0050] When two adjacent spray rings 18 are connected, the two second hinge shafts 33 of the movable connection assembly are respectively fixed to the lower ends of the two spray rings 18. The first connecting rod 17 is located inside the ring.

[0051] like Figure 5 As shown, the driving unit includes a second motor 20 , which is fixed in one end of the first fixing frame 14 on one side of the rotating sleeve 22 , and the output shaft of the second motor 20 is fixedly connected to the rotating sleeve 22 .

[0052] When treating the flue gas, the two treatment liquid pipes are connected to the upper water inlet pipe 8 and the lower water inlet pipe 9 respectively, and the liquid inlet pressure of the upper water inlet pipe 8 is greater than the liquid inlet pressure of the lower water inlet pipe 9.

[0053] The first motor 11 is started, and the first motor 11 drives the liquid inlet pipe 5, the fixing rod 15 and the ring member to rotate through the gear 10 and the gear ring 4. The second motor 20 is started, and the second motor 20 drives the rotating sleeve 22 to rotate. When the rotating sleeve 22 rotates, the spray ring 18 is driven to rotate through the movable connection assembly.

[0054] The processing liquid enters the fourth cavity 31 and the sixth cavity 38 respectively, the processing liquid pressure in the fourth cavity 31 is lower than the processing liquid pressure in the sixth cavity 38, the processing liquid in the fourth cavity 31 enters the second cavity 26 through the first cavity 23, and the processing liquid in the sixth cavity 38 enters the third cavity 27 through the fifth cavity 37. At the same time, the processing liquid pressure in the second cavity 26 is lower than the processing liquid pressure in the third cavity 27.

[0055] The treatment liquid in the second cavity 26 can enter the second water cavity 36 , and the treatment liquid in the third cavity 27 can enter the first water cavity 35 .

[0056] When the rotating sleeve 22 and the spray ring 18 rotate, the first connecting rod 17 and the second connecting rod 25 can rotate around the first hinge shaft 24, and the second connecting rod 25 can rotate around the second hinge shaft 33. Therefore, the rotating sleeve 22 and the spray ring 18 can rotate around their axes respectively.

[0057] When the rotating sleeve 22 and the spray ring 18 rotate, the rotating sleeve 22 and the spray ring 18 can spray the treatment liquid in the second water chamber 36 upward in a divergent shape in the cylinder body 1. When the rotating sleeve 22 and the spray ring 18 rotate, the treatment liquid in the first water chamber 35 can be sprayed downward in a divergent shape in the cylinder body 1.

[0058] The ring can rotate in the cylinder 1, and at the same time, the rotating sleeve 22 and the spray ring 18 can rotate, so that the treatment liquid can be evenly sprayed into the cylinder 1, and the treatment liquid can effectively treat the flue gas.

[0059] The flue gas enters the cylinder 1 through the inlet pipe 2, and the treatment liquid sprayed into the cylinder 1 is fully mixed with the flue gas and reacts with the harmful substances in the flue gas. The treatment liquid can reduce the content of harmful substances in the flue gas. At the same time, the impurities such as smoke dust in the flue gas can be mixed with the treatment liquid and then fall into the lower end of the cylinder 1 along with the treatment liquid, which can reduce the content of impurities such as smoke dust in the flue gas. The flue gas treated by the treatment liquid is discharged from the outlet pipe 3 to the outside of the cylinder 1. The treatment liquid in the cylinder 1 can be discharged by opening the valve 13 on the discharge pipe 12.

[0060] Since the pressure of the treatment liquid in the second cavity 26 is lower than the pressure of the treatment liquid in the third cavity 27, the flow rate of the spray liquid sprayed downwardly inside the cylinder 1 is greater than the flow rate of the spray liquid sprayed downwardly inside the cylinder 1. By increasing the flow rate of the spray liquid sprayed downwardly inside the cylinder 1, the upward speed of the flue gas in the cylinder 1 can be reduced, the reaction time between the flue gas and the treatment liquid in the cylinder 1 can be increased, and the treatment effect of the treatment liquid on the flue gas can be improved.

[0061] By reducing the flow rate of the spray liquid sprayed toward the upper part of the cylinder 1, it is possible to avoid the spray liquid sprayed toward the upper part of the cylinder 1 increasing the flow rate of the smoke in the cylinder 1 due to excessive flow rate.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A chemical plant flue gas purification system, comprising a cylinder (1), wherein the upper end of the cylinder (1) is fixedly connected to an outlet pipe (3), the lower end of the cylinder (1) is fixedly connected to a discharge pipe (12), a valve (13) is installed on the discharge pipe (12), and the lower part of the cylinder (1) is fixedly connected to an inlet pipe (2), characterized in that: The upper end of the cylinder (1) is rotatably sealed and connected to a liquid inlet pipe (5). A driving assembly for driving the liquid inlet pipe (5) to rotate is arranged on the cylinder (1). A fourth cavity (31) and a sixth cavity (38) are arranged in the liquid inlet pipe (5). A liquid inlet assembly is rotatably arranged on the upper end of the liquid inlet pipe (5). Two liquid inlet ends of the liquid inlet assembly are respectively connected to the fourth cavity (31) and the sixth cavity (38). The lower end of the liquid inlet pipe (5) is located in the cylinder (1). The lower end of the liquid inlet pipe (5) is fixedly connected to a fixing rod (15) vertically disposed therewith. A first cavity (23) and a fifth cavity (37) arranged up and down are opened in the fixing rod (15). The fourth cavity (31) is connected to the first cavity (23), and the fifth cavity (37) is connected to the sixth cavity (38). A ring is fixed to one end of the fixing rod (15) away from the liquid inlet pipe (5), and a second cavity (26) and a third cavity (27) arranged vertically are provided in the ring. The second cavity (26) is communicated with the first cavity (23), and the third cavity (27) is communicated with the fifth cavity (37). A spray assembly is rotatably arranged on the ring, and a driving unit is arranged on the ring. The driving unit is connected to the spray assembly. A second water cavity (36) and a first water cavity (35) distributed vertically are arranged in the spray assembly. The second water cavity (36) is communicated with the second cavity (26), and the first water cavity (35) is communicated with the third cavity (27). The ring comprises an arc-shaped first fixing frame (14) and a plurality of arc-shaped second fixing frames (16). The first fixing frame (14) is connected to the second fixing frame (16). 4) and the second fixing frame (16) are provided with a second cavity (26) and a third cavity (27) arranged up and down, the first fixing frame (14) is fixedly connected to the fixing rod (15), the second cavity (26) of the first fixing frame (14) is communicated with the first cavity (23) of the fixing rod (15), and the third cavity (27) of the first fixing frame (14) is communicated with the fifth cavity (37) of the fixing rod (15); the spray assembly comprises a rotating sleeve (22), the rotating sleeve (22) is rotatably arranged at one end of the first fixing frame (14), the rotating sleeve (22) is circumferentially evenly provided with a plurality of spray holes (21), the other end of the first fixing frame (14) is fixed with a fixing plate (19), and the fixing plate (19) on the first fixing frame (14) is provided with a plurality of spray holes (21) arranged at the same time. Two openings are provided, and the two openings are respectively connected to the second cavity (26) and the third cavity (27) of the first fixed frame (14); a fixed plate (19) is fixed at both ends of the second fixed frame (16), and the fixed plate (19) on the second fixed frame (16) is provided with two slots, and the two slots are respectively connected to the second cavity (26) and the third cavity (27) of the second fixed frame (16); two adjacent fixed plates (19) are fixedly connected by a third partition plate (34), and a spray ring (18) is rotatably sealed between the two adjacent fixed plates (19), and the third partition plate (34) in the spray ring (18) is in rotatably sealed contact with the inner wall of the spray ring (18), and a plurality of spray holes (21) are provided on the circumference of the spray ring (18);The rotating seal sleeve of the rotating sleeve (22) is arranged on a fixed disk (19) on one side thereof; a third partition plate (34) is fixed on the fixed disk (19) inside the rotating sleeve (22); the third partition plate (34) inside the rotating sleeve (22) is in rotating sealing contact with the inner wall of the rotating sleeve (22); the third partition plate (34) is located between the second cavity (26) and the third cavity (27); the third partition plate (34) inside the spray ring (18) divides the inside of the spray ring (18) into a second water cavity (36) and a first water cavity (35) arranged vertically; the third partition plate (34) inside the rotating sleeve (22) divides the inside of the rotating sleeve (22) into a second water cavity (36) and a first water cavity (35) arranged vertically; the rotating sleeve (22) and its adjacent spray ring (18) and the two adjacent spray rings (18) are connected by a movable connection component; the movable connection component The invention comprises a first connecting rod (17), both ends of which are fixed with a first hinge shaft (24), and a second connecting rod (25) in an inverted L shape is rotatably connected to the first hinge shaft (24), one end of the second connecting rod (25) is rotatably connected to the first hinge shaft (24), and the other end of the second connecting rod (25) is rotatably connected to the second hinge shaft (33), and the axes of the first hinge shaft (24) and the second hinge shaft (33) are perpendicular; when the rotating sleeve (22) is connected to the adjacent spray ring (18), the two second hinge shafts (33) of the movable connection assembly are respectively fixed to the lower end of the rotating sleeve (22) and the lower end of the spray ring (18), and when the adjacent two spray rings (18) are connected, the two second hinge shafts (33) of the movable connection assembly are respectively fixed to the lower ends of the two spray rings (18), and the first connecting rod (17) is located inside the ring member. ; 2. The chemical plant flue gas purification system according to claim 1, characterized in that: A first partition (29) is fixed inside the liquid inlet pipe (5), and the first partition (29) divides the inside of the liquid inlet pipe (5) into a fourth cavity (31) and a sixth cavity (38).

3. The chemical plant flue gas purification system according to claim 1, characterized in that: The driving assembly comprises a first motor (11) fixed to the upper end of the cylinder (1), a gear (10) being coaxially fixed to the output shaft of the first motor (11), a gear ring (4) being coaxially fixed to the liquid inlet pipe (5) above the cylinder (1), and the gear ring (4) being meshed with the gear (10).

4. The chemical plant flue gas purification system according to claim 2, characterized in that: The liquid inlet assembly comprises three fixed rings (7) fixed on the upper end of the liquid inlet pipe (5), the fixed rings (7) being concentric with the liquid inlet pipe (5), the three fixed rings (7) being arranged in a linear array along the axial direction of the liquid inlet pipe (5), a rotating ring (6) being rotatably sealed between two adjacent fixed rings (7), a first through hole (28) being provided on the liquid inlet pipe (5) on the inner side of the upper rotating ring (6), a second through hole (30) being provided on the liquid inlet pipe (5) on the inner side of the lower rotating ring (6), the first through hole (28) being communicated with a sixth cavity (38), the second through hole (30) being communicated with a fourth cavity (31), an upper water inlet pipe (8) being fixed on the upper rotating ring (6), the upper water inlet pipe (8) being communicated with the first through hole (28), and a lower water inlet pipe (9) being fixed on the lower rotating ring (6), the lower water inlet pipe (9) being communicated with the second through hole (30).

5. The chemical plant flue gas purification system according to claim 2, characterized in that: The interior of the fixed rod (15) is hollow, and a second partition plate (32) is fixed inside the fixed rod (15). The second partition plate (32) divides the interior of the fixed rod (15) into a first cavity (23) and a fifth cavity (37). The second partition plate (32) is fixedly connected to the first partition plate (29).

6. The chemical plant flue gas purification system according to claim 1, characterized in that: The driving unit comprises a second motor (20), the second motor (20) being fixed in one end of a first fixing frame (14) on one side of a rotating sleeve (22), and an output shaft of the second motor (20) being fixedly connected to the rotating sleeve (22).

7. The flue gas treatment method based on the flue gas purification treatment system of a chemical plant according to claim 1 is characterized in that: When treating the flue gas, the driving assembly is started, and the driving assembly drives the liquid inlet pipe (5), the fixing rod (15) and the ring member to rotate; the driving unit is started, and the driving unit drives the spray assembly to rotate; the treatment liquid is introduced into the fourth cavity (31) and the sixth cavity (38) through the two liquid inlet ends of the liquid inlet assembly, respectively, so that the pressure of the treatment liquid in the fourth cavity (31) is less than the pressure of the treatment liquid in the sixth cavity (38), that is, the pressure of the treatment liquid in the second cavity (26) is less than the pressure of the treatment liquid in the third cavity (27). When the spray assembly rotates, the spray assembly can spray the treatment liquid in the second cavity (26) in the cylinder (1) upward in a divergent manner, and the spray assembly can spray the treatment liquid in the third cavity (27) in the cylinder (1) downward in a divergent manner; so that the flue gas enters the cylinder (1) through the inlet pipe (2), and the treatment liquid sprayed into the cylinder (1) is fully mixed with the flue gas and reacts with harmful substances in the flue gas, so that the treatment liquid can reduce the content of harmful substances in the flue gas. At the same time, smoke impurities in the flue gas can be mixed with the treatment liquid and then fall into the lower end of the cylinder (1) along with the treatment liquid, thereby reducing the content of smoke impurities in the flue gas; the flue gas treated by the treatment liquid is discharged from the outlet pipe (3) to the outside of the cylinder (1); the treatment liquid in the cylinder (1) can be discharged by opening the valve (13) on the discharge pipe (12); since the pressure of the treatment liquid in the second cavity (26) is lower than the pressure of the treatment liquid in the third cavity (27), the spray sprayed toward the lower part of the cylinder (1) The liquid flow rate is greater than the flow rate of the spray liquid sprayed below the cylinder (1). By increasing the flow rate of the spray liquid sprayed toward the lower part of the cylinder (1), the upward speed of the smoke in the cylinder (1) can be reduced, the reaction time between the smoke and the treatment liquid in the cylinder (1) can be increased, and the treatment effect of the treatment liquid on the smoke can be improved; by reducing the flow rate of the spray liquid sprayed toward the upper part of the cylinder (1), it can be avoided that the spray liquid sprayed toward the upper part of the cylinder (1) increases the flow rate of the smoke in the cylinder (1) due to excessive flow rate.

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