CN112093842A - Device for removing free chlorine in fresh brine and dechlorinating method thereof - Google Patents
Device for removing free chlorine in fresh brine and dechlorinating method thereof Download PDFInfo
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- CN112093842A CN112093842A CN202011034556.4A CN202011034556A CN112093842A CN 112093842 A CN112093842 A CN 112093842A CN 202011034556 A CN202011034556 A CN 202011034556A CN 112093842 A CN112093842 A CN 112093842A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
Abstract
The invention discloses a device for removing free chlorine in fresh brine and a dechlorination method thereof, and the device comprises a dechlorination tower, wherein one side of the upper end of the dechlorination tower is fixedly connected with a first fresh brine inlet pipe, one end of the first fresh brine inlet pipe is connected with a mixing pipeline through a flange, one end of the first fresh brine inlet pipe close to the mixing pipeline is connected with a first short pipe, one end of the first short pipe is fixedly connected with a pH value online analyzer, and the upper end of the dechlorination tower is fixedly connected with a chlorine outlet pipe. This device of free chlorine in desorption thin salt water and dechlorination method thereof, at first thin salt water advance the pipe and advance the mixed pipeline of dress additional between the pipe with the second thin salt water, and before thin salt water gets into the dechlorination tower, add hydrochloric acid to it in order to adjust the pH value of thin salt water, control the flowmeter through the size of pH value and add the hydrochloric acid volume of putting, realize automatic control, thin salt water gets into the dechlorination tower and removes the free chlorine in the salt water again, thereby reduce the consumption of sodium sulfite, set up deflector and first flabellum in the mixed pipeline, improve mixing efficiency.
Description
Technical Field
The invention relates to the technical field of dechlorination of light salt brine, in particular to a device for removing free chlorine in the light salt brine and a dechlorination method thereof.
Background
In the sodium hydroxide production process, a large amount of light brine containing free chlorine is produced, and the light brine is circulated in a closed loop between brine refining and electrolysis, namely brine refining → electrolysis → brine refining. Since the free chlorine in the electrolyzed fresh brine has a very strong oxidizing property, when the fresh brine containing the free chlorine is recycled from the electrolysis step to the brine purification, the free chlorine is oxidized and corrodes pipelines and equipment in the brine purification system, thereby inhibiting the formation of precipitates in the brine purification step and damaging resins in a secondary brine filter element and a resin tower, and the free chlorine must be removed from the fresh brine. ORP indexes of dechlorinated light salt brine from an electrolysis section often exceed standards, so that the use amount of sodium sulfite is gradually increased, sodium sulfate in the brine is continuously enriched, and a production system needs to be technically improved.
Disclosure of Invention
The invention aims to provide a device for removing free chlorine in fresh brine and a dechlorination method thereof, wherein a mixing pipeline is additionally arranged between a first fresh brine inlet pipe and a second fresh brine inlet pipe, hydrochloric acid is added into the fresh brine to adjust the pH value of the fresh brine before the fresh brine enters a dechlorination tower, the amount of discharged hydrochloric acid is controlled by controlling a flow meter according to the pH value, automatic control is realized, the fresh brine enters the dechlorination tower to remove the free chlorine in the brine, so that the consumption of sodium sulfite is reduced, a guide plate and a first fan blade are arranged in the mixing pipeline to stir and mix mixed liquid to improve the mixing efficiency, a rotating plate structure is connected to a chlorine outlet pipe, water pressure is utilized to drive the second fan blade to rotate, negative pressure is formed in the chlorine outlet pipe to accelerate the discharge of chlorine, the spiral blade increases the flow path of the fresh brine, the fresh brine is splashed by a raised block to further improve the overflow of chloride ions in the fresh brine, the effect of removing chloride ions is improved to solve the problems proposed in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a device for removing free chlorine in dilute brine comprises a dechlorinating tower, wherein a first dilute brine inlet pipe is fixedly connected to one side of the upper end of the dechlorinating tower, one end of the first dilute brine inlet pipe is connected with a mixing pipeline through a flange, one end, close to the mixing pipeline, of the first dilute brine inlet pipe is connected with a first short pipe, one end of the first short pipe is fixedly connected with a pH value online analyzer, the upper end of the dechlorinating tower is fixedly connected with a chlorine outlet pipe, a packing layer is arranged inside the dechlorinating tower, one end, far away from the first dilute brine inlet pipe, of the mixing pipeline is connected with a second dilute brine inlet pipe through a flange, the side wall of the second dilute brine inlet pipe is connected with a second short pipe, and one end of the second short pipe is connected with a hydrochloric acid;
one end inside the mixing pipeline is fixedly connected with a guide ring, the side wall of the guide ring is equidistantly connected with a guide plate, the center of the guide plate is fixedly connected with a central plate, and the center of the central plate is connected with a guide post in a penetrating way;
the lower extreme of chlorine exit tube runs through the packing layer, and the chlorine exit tube has seted up first chlorine import near the equidistant a week of upper end, sets up the second chlorine import that has the distribution soon on the chlorine exit tube of first chlorine import below, and swing joint has the rotating plate structure on the chlorine exit tube between first chlorine import and the second chlorine import, and the lower extreme of chlorine exit tube a week is equidistant a third chlorine import of having seted up, the inside of chlorine exit tube.
Preferably, the first short pipe and the second short pipe are both provided with electromagnetic valves, and the second short pipe is provided with a check valve and a flowmeter.
Preferably, fixedly connected with slider on the lateral wall of guide post, the one end fixedly connected with stopper of guide post, one side fixedly connected with spring of stopper, the spring cup joints with the guide post, the one end of spring and one side fixed connection of well core plate, the other end fixedly connected with swing joint of guide post has the pivot, the first flabellum of fixedly connected with in the pivot.
Preferably, the rotating plate structure comprises a first rotating ring, a second rotating ring and a movable ring, and the first rotating ring and the second rotating ring are connected through the movable ring penetrating through the chlorine outlet pipe.
Preferably, the rotating plate structure further comprises an arc plate, an inner support frame and a second fan blade, wherein the arc plate is arranged on the outer wall of the first rotating ring at equal intervals, the position of the arc plate corresponds to one end of the first light salt water inlet pipe, the outer wall of the inner support frame is fixedly connected with the inner wall of the second rotating ring, and the second fan blade is fixedly connected with the upper surface of the center of the inner support frame.
Preferably, the upper surface and the lower surface of the movable ring are both movably connected with rotating beads.
Preferably, the chlorine outlet pipe is fixedly connected with a helical blade at a position close to the second chlorine inlet, the upper end of the helical blade is arranged below the rotating plate structure, and the lower end of the helical blade is flush with the upper surface of the packing layer.
Preferably, the surface of the helical blade is provided with a convex block in a staggered manner, and the thickness of the lower end of the convex block is greater than that of the upper end of the convex block.
The invention aims to solve another technical problem of providing a dechlorination method of a device for removing free chlorine in fresh brine, which comprises the following steps:
s1: the dilute brine enters from the second dilute brine inlet pipe, the flow meter controls the hydrochloric acid adding device to add hydrochloric acid, and the dilute brine mixed with the hydrochloric acid enters the mixing pipeline;
s2: when the mixed liquid passes through the guide plate, the mixed liquid rotates under the action of the guide plate, and the first fan blades are driven to rotate under the action of liquid flow to stir the dilute brine and the hydrochloric acid, so that the dilute brine and the hydrochloric acid are further mixed in the mixing pipeline;
s3: the mixed solution enters a first dilute brine inlet pipe, a pH value on-line analyzer analyzes the pH value of the mixed solution on line, and after the pH value exceeds a set range, a flow meter is controlled to adjust the flow of hydrochloric acid, so that the pH value is ensured to be 1.5;
s4: the dilute brine entering the dechlorination tower is sprayed onto the arc-shaped plate under the impact of pressure to drive the first rotating ring to rotate, meanwhile, the second rotating ring synchronously rotates, and the second fan blades rotate along with the rotation to form negative pressure in a chlorine outlet pipe;
s5: chlorine overflowing from the light salt brine enters the chlorine outlet pipe through the first chlorine inlet and the second chlorine inlet in the dechlorinating tower, the light salt brine flows downwards to the packing layer along the spiral blades, the light salt brine is splashed by the raised blocks, the chlorine overflowing is accelerated, and meanwhile, part of the chlorine below the packing layer enters the chlorine outlet pipe through the third chlorine inlet.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a device for removing free chlorine in fresh brine and a dechlorination method thereof, wherein a mixing pipeline is additionally arranged between a first fresh brine inlet pipe and a second fresh brine inlet pipe, hydrochloric acid is added into the fresh brine to adjust the pH value of the fresh brine before the fresh brine enters a dechlorination tower, the amount of discharged hydrochloric acid is controlled by controlling a flow meter according to the pH value, automatic control is realized, the fresh brine enters the dechlorination tower to remove the free chlorine in the brine, so that the consumption of sodium sulfite is reduced, a guide plate and a first fan blade are arranged in the mixing pipeline, the mixed liquid is stirred and mixed to improve the mixing efficiency, a rotating plate structure is connected to a chlorine outlet pipe, water pressure is utilized to drive the second fan blade to rotate, negative pressure is formed in the chlorine outlet pipe to accelerate the discharge of chlorine, the spiral blade increases the flow path of the fresh brine, the fresh brine is highly splashed through a convex block, the chlorine ions in the fresh brine are further improved to overflow, the effect of removing chloride ions is improved.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a cross-sectional view of a mixing conduit of the present invention;
FIG. 3 is a view showing the internal structure of a mixing pipe according to the present invention;
FIG. 4 is a view showing the structure of a guide post according to the present invention;
FIG. 5 is a cross-sectional view of a dechlorination tower of the present invention;
FIG. 6 is a top view of a portion of the rotating plate structure of the present invention;
FIG. 7 is a view showing the structure of a chlorine gas outlet pipe according to the present invention;
FIG. 8 is a sectional view of a chlorine gas outlet pipe of the present invention.
In the figure: 1. a dechlorination tower; 11. a first dilute brine inlet pipe; 12. a first short pipe; 121. an electromagnetic valve; 13. a pH value on-line analyzer; 14. a filler layer; 15. a second dilute brine inlet pipe; 16. a second short pipe; 161. a check valve; 162. a flow meter; 2. a mixing duct; 21. a guide ring; 22. a guide plate; 23. a center plate; 24. a guide post; 241. a slider; 242. a limiting block; 243. a spring; 25. a rotating shaft; 26. a first fan blade; 3. a chlorine gas outlet pipe; 31. a first chlorine inlet; 32. a second chlorine inlet; 33. a third chlorine inlet; 34. a rotating plate structure; 341. a first rotation; 342. a second rotation; 343. a movable ring; 344. an arc-shaped plate; 345. an inner support frame; 346. a second fan blade; 35. a helical blade; 351. a raised block; 4. and a hydrochloric acid adding device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a device for removing free chlorine in fresh brine comprises a dechlorination tower 1, a first fresh brine inlet pipe 11 is fixedly connected to one side of the upper end of the dechlorination tower 1, one end of the first fresh brine inlet pipe 11 is connected with a mixing pipeline 2 through a flange, one end of the first fresh brine inlet pipe 11 close to the mixing pipeline 2 is connected with a first short pipe 12, one end of the first short pipe 12 is fixedly connected with a pH value on-line analyzer 13, the upper end of the dechlorination tower 1 is fixedly connected with a chlorine outlet pipe 3, a packing layer 14 is arranged inside the dechlorination tower 1, one end of the mixing pipeline 2 far away from the first fresh brine inlet pipe 11 is connected with a second fresh brine inlet pipe 15 through a flange, the side wall of the second fresh brine inlet pipe 15 is connected with a second short pipe 16, one end of the second short pipe 16 is connected with a hydrochloric acid adding device 4, electromagnetic valves 121 are respectively arranged on the first short pipe 12 and the second short pipe 16, a check valve 161, the pH value of the fresh brine is measured by the pH value on-line analyzer 13, the flow meter 162 is controlled by the pH value to add and discharge the hydrochloric acid amount, automatic control is realized, the pH value of the fresh brine is ensured to be 1.5, and the fresh brine enters the dechlorinating tower 1 to remove free chlorine in the brine, so that the consumption of sodium sulfite is reduced.
Referring to fig. 2-4, one end of the interior of the mixing pipe 2 is fixedly connected with a guide ring 21, the side wall of the guide ring 21 is equidistantly connected with a guide plate 22, the guide plate 22 is used for forming a rotational flow by the liquid, the rotational flow pushes the first fan blades 26 to rotate, the rotational flow accelerates the flow of the liquid and accelerates the mixing of the dilute brine and the hydrochloric acid, the center of the guide plate 22 is fixedly connected with a central plate 23, the center of the central plate 23 is connected with a guide post 24 in a penetrating manner, the side wall of the guide post 24 is fixedly connected with a slide block 241, one end of the guide post 24 is fixedly connected with a limit block 242, one side of the limit block 242 is fixedly connected with a spring 243, the spring 243 is sleeved with the guide post 24, one end of the spring 243 is fixedly connected with one side of the central plate 23, the other end of the guide, can promote stopper 242 shift position, spring 243 contracts, and first flabellum 26 shifts the position in mixing tube 2, further stirs light salt solution, improves the mixing effect.
Referring to fig. 5-8, the lower end of the chlorine outlet pipe 3 penetrates through the packing layer 14, a first chlorine inlet 31 is formed on a circumference of the chlorine outlet pipe 3 near the upper end at equal intervals, a second chlorine inlet 32 is formed on the chlorine outlet pipe 3 below the first chlorine inlet 31, a rotating plate structure 34 is movably connected to the chlorine outlet pipe 3 between the first chlorine inlet 31 and the second chlorine inlet 32, a third chlorine inlet 33 is formed on a circumference of the lower end of the chlorine outlet pipe 3 at equal intervals, the rotating plate structure 34 inside the chlorine outlet pipe 3 includes a first rotating ring 341, a second rotating ring 342, and a movable ring 343, the first rotating ring 341 and the second rotating ring 342 are connected by the movable ring 343 penetrating through the chlorine outlet pipe 3, the upper and lower surfaces of the movable ring 343 are movably connected with rotating beads to reduce the friction force of movement, the rotating plate structure 34 further includes an arc plate 344, an inner support frame 345, and a second fan blade 346, the arc plates 344 are equidistantly arranged on the outer wall of the first rotating ring 341, the position of the arc plates 344 corresponds to one end of the first dilute brine inlet pipe 11, dilute brine in the first dilute brine inlet pipe 11 directly impacts the arc plates 344 to drive the arc plates 344 to rotate, so as to drive the first rotating ring 341 to rotate, the outer wall of the inner support frame 345 is fixedly connected with the inner wall of the second rotating ring 342, the upper surface of the center of the inner support frame 345 is fixedly connected with the second fan blades 346, the second rotating ring 342 drives the second fan blades 346 to rotate, the second fan blades 346 blow air to the upper end of the chlorine gas outlet pipe 3, negative pressure is formed in the chlorine gas outlet pipe 3, the spiral blades 35 are fixedly connected to the position of the chlorine gas outlet pipe 3 close to the second chlorine gas inlet 32, dilute brine flows onto the packing layer 14 below through the spiral blades 35 after being sprayed out from the first dilute brine inlet pipe 11, the flow path of the dilute brine is increased by the spiral, the lower side of changeing board structure 34 is arranged in to helical blade 35's upper end, and helical blade 35's lower extreme flushes with the upper surface of packing layer 14, and helical blade 35's surface dislocation is provided with protruding piece 351, and the thickness of protruding piece 351 lower extreme is greater than the thickness of upper end, and through protruding piece 351, light salt solution is chosen highly and is splashed, further improves in the light salt solution that chloride ion spills over.
In order to better show the dechlorination process of the device for removing free chlorine in the dilute brine, the embodiment now proposes a dechlorination method of the device for removing free chlorine in the dilute brine, which comprises the following steps:
the method comprises the following steps: the dilute brine enters from the second dilute brine inlet pipe 15, the flow meter 162 controls the hydrochloric acid adding device 4 to add hydrochloric acid, and the dilute brine mixed with the hydrochloric acid enters the mixing pipeline 2;
step two: when the mixed liquid passes through the guide plate 22, the mixed liquid rotates under the action of the guide plate 22, and the first fan blades 26 are driven to rotate under the action of the flowing of the liquid to stir the light salt brine and the hydrochloric acid, so that the light salt brine and the hydrochloric acid are further mixed in the mixing pipeline 2;
step three: the mixed solution enters the first dilute brine inlet pipe 11, the pH value of the mixed solution is analyzed on line by the pH value on-line analyzer 13, the flow of hydrochloric acid is adjusted by controlling the flow meter 162 after the pH value exceeds a set range, the pH value is ensured to be 1.5, the amount of the added hydrochloric acid in the flow meter 162 is controlled by the pH value, and automatic control is realized;
step four: the dilute brine entering the dechlorination tower 1 is sprayed onto the arc-shaped plate 344 under the impact of pressure to drive the first rotating ring 341 to rotate, meanwhile, the second rotating ring 342 synchronously rotates, and the second fan blades 346 rotate along with the rotation to form negative pressure in the chlorine outlet pipe 3;
step five: chlorine overflowing from the light salt water enters the chlorine outlet pipe 3 through the first chlorine inlet 31 and the second chlorine inlet 32 in the dechlorination tower 1, the light salt water flows downwards to the packing layer 14 along the spiral blades 35, the light salt water splashing is further improved through the convex blocks 351, the chlorine overflowing is accelerated, and meanwhile, part of the chlorine below the packing layer 14 enters the chlorine outlet pipe 3 through the third chlorine inlet 33.
In summary, the following steps: the device for removing free chlorine in the fresh brine and the dechlorination method thereof are characterized in that a mixing pipeline 2 is additionally arranged between a first fresh brine inlet pipe 11 and a second fresh brine inlet pipe 15, hydrochloric acid is added into the fresh brine to adjust the pH value of the fresh brine before the fresh brine enters a dechlorination tower 1, the discharge amount of hydrochloric acid is controlled by a pH value control flowmeter 162 to realize automatic control, the fresh brine enters the dechlorination tower 1 to remove the free chlorine in the brine, so that the consumption of sodium sulfite is reduced, a guide plate 22 and a first fan blade 26 are arranged in the mixing pipeline 2 to stir and mix mixed liquid to improve the mixing efficiency, a rotating plate structure 34 is connected on a chlorine outlet pipe 3, the second fan blade 346 is driven by water pressure to rotate to form negative pressure in the chlorine outlet pipe 3 to accelerate the discharge of the chlorine, a spiral blade 35 increases the flowing path of the fresh brine, the fresh brine is lifted and splashed by a convex block 351 to further improve the overflow of chloride ions in the fresh brine, the effect of removing chloride ions is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (9)
1. The utility model provides a device of free chlorine in desorption weak brine, includes dechlorination tower (1), its characterized in that: one side of the upper end of the dechlorination tower (1) is fixedly connected with a first light brine inlet pipe (11), one end of the first light brine inlet pipe (11) is connected with a mixing pipeline (2) through a flange, one end of the first light brine inlet pipe (11) close to the mixing pipeline (2) is connected with a first short pipe (12), one end of the first short pipe (12) is fixedly connected with a pH value online analyzer (13), the upper end of the dechlorination tower (1) is fixedly connected with a chlorine outlet pipe (3), a packing layer (14) is arranged inside the dechlorination tower (1), one end of the mixing pipeline (2) far away from the first light brine inlet pipe (11) is connected with a second light brine inlet pipe (15) through a flange, the side wall of the second light brine inlet pipe (15) is connected with a second short pipe (16), and one end of the second short pipe (16) is connected with a hydrochloric acid adding device (4;
one end inside the mixing pipeline (2) is fixedly connected with a guide ring (21), the side wall of the guide ring (21) is equidistantly connected with a guide plate (22), the center of the guide plate (22) is fixedly connected with a central plate (23), and the center of the central plate (23) is connected with a guide column (24) in a penetrating way;
the lower extreme of chlorine exit tube (3) runs through packing layer (14), and chlorine exit tube (3) are close to the equidistant a week of upper end and have seted up first chlorine import (31), set up on chlorine exit tube (3) of first chlorine import (31) below and have second chlorine import (32) of distribution soon, swing joint has rotating plate structure (34) on chlorine exit tube (3) between first chlorine import (31) and second chlorine import (32), lower extreme a week of chlorine exit tube (3) is equidistant third chlorine import (33) of having seted up, the inside of chlorine exit tube (3).
2. The apparatus for removing free chlorine from a dilute brine according to claim 1, wherein: the first short pipe (12) and the second short pipe (16) are both provided with an electromagnetic valve (121), and the second short pipe (16) is provided with a check valve (161) and a flowmeter (162).
3. The apparatus for removing free chlorine from a dilute brine according to claim 1, wherein: fixedly connected with slider (241) on the lateral wall of guide post (24), the one end fixedly connected with stopper (242) of guide post (24), one side fixedly connected with spring (243) of stopper (242), spring (243) cup joint with guide post (24), the one end of spring (243) and one side fixed connection of well core plate (23), the other end fixedly connected with swing joint of guide post (24) has pivot (25), first flabellum (26) of fixedly connected with on pivot (25).
4. The apparatus for removing free chlorine from a dilute brine according to claim 1, wherein: the rotating plate structure (34) comprises a first rotating ring (341), a second rotating ring (342) and a movable ring (343), and the first rotating ring (341) and the second rotating ring (342) are connected through the movable ring (343) penetrating through the chlorine gas outlet pipe (3).
5. The apparatus for removing free chlorine from a dilute brine according to claim 4, wherein: the rotating plate structure (34) further comprises an arc-shaped plate (344), an inner supporting frame (345) and second fan blades (346), the arc-shaped plate (344) is equidistantly arranged on the outer wall of the first rotating ring (341), the position of the arc-shaped plate (344) corresponds to one end of the first light salt water inlet pipe (11), the outer wall of the inner supporting frame (345) is fixedly connected with the inner wall of the second rotating ring (342), and the upper surface of the center of the inner supporting frame (345) is fixedly connected with the second fan blades (346).
6. The apparatus for removing free chlorine from a dilute brine according to claim 4, wherein: the upper surface and the lower surface of the movable ring (343) are movably connected with rotating beads.
7. The apparatus for removing free chlorine from a dilute brine according to claim 1, wherein: the chlorine outlet pipe (3) is fixedly connected with a helical blade (35) at a position close to the second chlorine inlet (32), the upper end of the helical blade (35) is arranged below the rotating plate structure (34), and the lower end of the helical blade (35) is flush with the upper surface of the packing layer (14).
8. The apparatus for removing free chlorine from a dilute brine according to claim 7, wherein: the surface of the spiral blade (35) is provided with convex blocks (351) in a staggered mode, and the thickness of the lower end of each convex block (351) is larger than that of the upper end of each convex block.
9. A dechlorination method of an installation for removing free chlorine from fresh brine according to any one of claims 1 to 8, comprising the steps of:
s1: the dilute brine enters from a second dilute brine inlet pipe (15), the flow meter (162) controls the hydrochloric acid adding device (4) to add hydrochloric acid, and the dilute brine mixed with the hydrochloric acid enters the mixing pipeline (2);
s2: when the mixed liquid passes through the guide plate (22), the mixed liquid rotates under the action of the guide plate (22), and the first fan blade (26) is driven to rotate under the action of liquid flow to stir the dilute brine and the hydrochloric acid, so that the dilute brine and the hydrochloric acid are further mixed in the mixing pipeline (2);
s3: the mixed solution enters a first dilute brine inlet pipe (11), a pH value on-line analyzer (13) analyzes the pH value of the mixed solution on line, and after the pH value exceeds a set range, a flow meter (162) is controlled to adjust the flow of the hydrochloric acid to ensure that the pH value is 1.5;
s4: the dilute brine entering the dechlorination tower (1) is sprayed onto the arc-shaped plate (344) under the impact of pressure to drive the first rotating ring (341) to rotate, meanwhile, the second rotating ring (342) synchronously rotates, and the second fan blades (346) rotate along with the rotation to form negative pressure in the chlorine outlet pipe (3);
s5: chlorine overflowing from the light salt water enters the chlorine outlet pipe (3) through the first chlorine inlet (31) and the second chlorine inlet (32) in the dechlorinating tower (1), the light salt water flows downwards to the packing layer (14) along the spiral blades (35), the splashing of the light salt water is further improved through the convex blocks (351), the chlorine overflowing is accelerated, and meanwhile, part of the chlorine below the packing layer (14) enters the chlorine outlet pipe (3) through the third chlorine inlet (33).
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| CN202011034556.4A CN112093842B (en) | 2020-09-27 | 2020-09-27 | Device for removing free chlorine in dilute brine and dechlorination method thereof |
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| CN202011034556.4A CN112093842B (en) | 2020-09-27 | 2020-09-27 | Device for removing free chlorine in dilute brine and dechlorination method thereof |
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| CN112093842B CN112093842B (en) | 2023-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210394884A1 (en) * | 2016-09-23 | 2021-12-23 | Evoqua Water Technologies Llc | Ballast Water Treatment and Neutralization |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002239587A (en) * | 2001-02-20 | 2002-08-27 | Takeshi Yoshioka | Apparatus for increasing dissolved oxygen in deep sea water |
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| JP2002239587A (en) * | 2001-02-20 | 2002-08-27 | Takeshi Yoshioka | Apparatus for increasing dissolved oxygen in deep sea water |
| CN206577613U (en) * | 2017-03-20 | 2017-10-24 | 浙江为环科技有限公司 | A kind of Spiralism type pipe-line mixer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20210394884A1 (en) * | 2016-09-23 | 2021-12-23 | Evoqua Water Technologies Llc | Ballast Water Treatment and Neutralization |
| US11724790B2 (en) * | 2016-09-23 | 2023-08-15 | Evoqua Water Technologies Llc | Ballast water treatment and neutralization |
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| Publication number | Publication date |
|---|---|
| CN112093842B (en) | 2023-06-30 |
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