CN112093842B - Device for removing free chlorine in dilute brine and dechlorination method thereof - Google Patents
Device for removing free chlorine in dilute brine and dechlorination method thereof Download PDFInfo
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- CN112093842B CN112093842B CN202011034556.4A CN202011034556A CN112093842B CN 112093842 B CN112093842 B CN 112093842B CN 202011034556 A CN202011034556 A CN 202011034556A CN 112093842 B CN112093842 B CN 112093842B
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2201/002—Construction details of the apparatus
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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Abstract
The invention discloses a device for removing free chlorine in dilute brine and a dechlorination method thereof, comprising a dechlorination tower, wherein one side of the upper end of the dechlorination tower is fixedly connected with a first dilute brine inlet pipe, one end of the first dilute brine inlet pipe is connected with a mixing pipeline through a flange, one end of the first dilute brine inlet pipe, which is 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 on-line analyzer, and the upper end of the dechlorination tower is fixedly connected with a chlorine outlet pipe. According to the device for removing free chlorine in the fresh brine and the dechlorination method thereof, the mixing pipeline is additionally arranged between the first fresh brine inlet pipe and the second fresh brine inlet pipe, hydrochloric acid is added into the first fresh brine inlet pipe before the fresh brine enters the dechlorination tower to adjust the pH value of the fresh brine, the amount of the hydrochloric acid is added and discharged through the pH value control flow meter, 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, and the guide plate and the first fan blade are arranged in the mixing pipeline to improve the mixing efficiency.
Description
Technical Field
The invention relates to the technical field of dechlorination of dilute brine, in particular to a device for removing free chlorine in dilute brine and a dechlorination method thereof.
Background
In the sodium hydroxide production process, a large amount of light brine containing free chlorine is generated, and the light brine is circulated between the brine refining and the electrolysis process, namely, the brine refining, the electrolysis process and the brine refining. Since free chlorine in electrolyzed brine has extremely strong oxidizing property, recycling of brine containing free chlorine from the electrolysis step to brine purification oxidizes and corrodes piping and equipment in the brine purification system, preventing formation of precipitate in the brine purification step, damaging the secondary brine filter element and resin in the resin column, and thus, removing free chlorine from brine is necessary. The ORP index of the dechlorinated light brine from the electrolysis section is often out of standard, so that the usage amount of sodium sulfite is gradually increased, and meanwhile, the sodium sulfate in the brine is continuously enriched, and the production system is required 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 to the first fresh brine inlet pipe before the fresh brine enters a dechlorination tower to adjust the pH value of the fresh brine, the automatic control is realized by controlling the amount of the added hydrochloric acid by a flow meter according to the pH value, 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, the mixing efficiency is improved, a rotating plate structure is connected on a chlorine outlet pipe, the second fan blade is driven to rotate by water pressure, negative pressure is formed in the chlorine outlet pipe, the chlorine discharge is accelerated, the spiral blade increases the flow path of the fresh brine, the fresh brine passes through a bulge block, the fresh brine is scattered up, the overflow of chloride ions in the fresh brine is further improved, and the effect of removing the chloride ions is improved, and the problem in the background technology is solved.
In order to achieve the above purpose, the present invention provides the following technical solutions: the device for removing free chlorine in the fresh brine 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, which is 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 on-line analyzer, the upper end of the dechlorination tower is fixedly connected with a chlorine outlet pipe, a packing layer is arranged in the dechlorination tower, one end, which is far away from the first fresh brine inlet pipe, of the mixing pipeline is connected with a second fresh brine inlet pipe through a flange, the side wall of the second fresh brine inlet pipe is connected with a second short pipe, and one end of the second short pipe is connected with a hydrochloric acid adding device;
one end of the interior of the mixing pipeline is fixedly connected with a guide ring, guide plates are equidistantly connected to the side walls of the guide ring, the center of each guide plate is fixedly connected with a center plate, and the center of each center plate is connected with a guide post in a penetrating manner;
the lower extreme of chlorine exit tube runs through the packing layer, and the chlorine exit tube is close to the equidistant first chlorine import of seting up of a week of upper end, has seted up the second chlorine import of spin distribution 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 third chlorine import has been setted up to the equidistant lower extreme a week of chlorine exit tube, 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, the lateral wall of guide post is last fixedly connected with slider, and the one end fixedly connected with stopper of guide post, one side fixedly connected with spring of stopper, spring cup joint with the guide post, the one end of spring and one side fixedly connected with pivot of center plate, the other end fixedly connected with swing joint of guide post has first flabellum 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 supporting frame and second fan blades, wherein the arc plate is arranged on the outer wall of the first rotating ring at equal distance, the position of the arc plate corresponds to one end of the first dilute brine inlet pipe, the outer wall of the inner supporting frame is fixedly connected with the inner wall of the second rotating ring, and the second fan blades are fixedly connected to the upper surface of the center of the inner supporting 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 spiral blade at a position close to the second chlorine inlet, the upper end of the spiral blade is arranged below the rotating plate structure, and the lower end of the spiral blade is flush with the upper surface of the packing layer.
Preferably, the surface of the helical blade is provided with protruding blocks in a dislocation manner, and the thickness of the lower ends of the protruding blocks is larger than that of the upper ends.
The invention provides a dechlorination method of a device for removing free chlorine in dilute 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 into 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 the liquid flow, so that the dilute brine and the hydrochloric acid are stirred, and 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, the pH value of the mixed solution is analyzed on line by a pH value on-line analyzer, and after the pH value exceeds a set range, the flow of hydrochloric acid is regulated by controlling a flowmeter, so that the pH value is ensured to be 1.5;
s4: the dilute brine entering the dechlorination tower is sprayed onto the arc plate under the impact of pressure to drive the first rotating ring to rotate, and simultaneously the second rotating ring synchronously rotates, and the second fan blades rotate along with the rotation to form negative pressure in the chlorine outlet pipe;
s5: the chlorine overflows from the dilute brine in the dechlorination tower, enters into the chlorine outlet pipe through the first chlorine inlet and the second chlorine inlet, the dilute brine flows down to the filler layer along the spiral blade, the bulge block further improves the splashing of the dilute brine, the chlorine overflows faster, and meanwhile part of the chlorine below the filler layer enters into the chlorine outlet pipe through the third chlorine inlet.
Compared with the prior art, the invention has the beneficial effects that: according to the device and the method for removing free chlorine in the fresh brine, provided by the invention, a mixing pipeline is additionally arranged between a first fresh brine inlet pipe and a second fresh brine inlet pipe, hydrochloric acid is added to the fresh brine before the fresh brine enters a dechlorination tower to adjust the pH value of the fresh brine, automatic control is realized by adding the amount of the hydrochloric acid into a flow meter according to the pH value, the fresh brine enters the dechlorination tower to remove the free chlorine in the brine again, 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, the mixing efficiency is improved, a rotating plate structure is connected on a chlorine outlet pipe, the second fan blade is driven to rotate by water pressure, negative pressure is formed in the chlorine outlet pipe, the chlorine discharge is accelerated, the spiral blade increases the flow path of the fresh brine, the fresh brine passes through a protruding block, the fresh brine is scattered highly, the overflow of chloride ions in the fresh brine is further improved, and the effect of removing the 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 tube of the present invention;
FIG. 3 is a diagram of the internal structure of a mixing duct of the present invention;
FIG. 4 is a block diagram of a steering column of the present invention;
FIG. 5 is a cross-sectional view of the dechlorination tower of the present invention;
FIG. 6 is a top view of a portion of the rotor plate structure of the present invention;
FIG. 7 is a schematic diagram of a chlorine gas outlet pipe according to the present invention;
FIG. 8 is a cross-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 tube; 121. an electromagnetic valve; 13. an online pH value analyzer; 14. a filler layer; 15. a second dilute brine inlet pipe; 16. a second short tube; 161. a check valve; 162. a flow meter; 2. a mixing pipe; 21. a guide ring; 22. a guide plate; 23. a center plate; 24. a guide post; 241. a slide block; 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 turn; 342. a second turn; 343. a movable ring; 344. an arc-shaped plate; 345. an internal support; 346. a second fan blade; 35. a helical blade; 351. a protruding block; 4. and adding hydrochloric acid.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a device for removing free chlorine in fresh brine includes 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 pipe 2 through a flange, one end of the first fresh brine inlet pipe 11, which is close to the mixing pipe 2, is connected with a first short pipe 12, one end of the first short pipe 12 is fixedly connected with a pH 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 in the dechlorination tower 1, one end of the mixing pipe 2, which is far away from the first fresh brine inlet pipe 11, is connected with a second fresh brine inlet pipe 15 through a flange, a second short pipe 16 is connected to the side wall of the second fresh brine inlet pipe 15, one end of the second short pipe 16 is connected with a hydrochloric acid adding device 4, solenoid valves 121 are installed on the first short pipe 12 and the second short pipe 16, a check valve 161 and a flowmeter 162 are installed on the second short pipe 16, the pH on-line analyzer 13 measures the pH of fresh brine, the free chlorine is automatically added into the dechlorination tower 1 through a pH value control flow meter 162, thereby reducing the consumption of fresh brine in the dechlorination tower 1.
Referring to fig. 2-4, one end inside 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 rotational flow by liquid, the rotational flow pushes a first fan blade 26 to rotate, the rotational flow accelerates the liquid flow, meanwhile, the mixing of the fresh brine and hydrochloric acid is accelerated, the center of the guide plate 22 is fixedly connected with a center plate 23, the center of the center plate 23 is connected with a guide column 24 in a penetrating manner, the side wall of the guide column 24 is fixedly connected with a sliding block 241, one end of the guide column 24 is fixedly connected with a limiting block 242, one side of the limiting block 242 is fixedly connected with a spring 243, the spring 243 is sleeved with the guide column 24, one end of the spring 243 is fixedly connected with one side of the center plate 23, the other end of the guide column 24 is fixedly connected with a rotating shaft 25, the rotating shaft 25 is fixedly connected with a first fan blade 26, when the liquid pressure is high, the limiting block 242 can be pushed to move, the spring 243 contracts, the first fan blade 26 moves in the position in the mixing pipe 2, and the fresh brine is further stirred, and the mixing effect is improved.
Referring to fig. 5-8, the lower end of the chlorine gas outlet pipe 3 penetrates through the packing layer 14, a circumference of the chlorine gas outlet pipe 3 near the upper end is equidistantly provided with a first chlorine gas inlet 31, the chlorine gas outlet pipe 3 below the first chlorine gas inlet 31 is provided with a second chlorine gas inlet 32 which is distributed in a rotating way, the chlorine gas outlet pipe 3 between the first chlorine gas inlet 31 and the second chlorine gas inlet 32 is movably connected with a rotating plate structure 34, the circumference of the lower end of the chlorine gas outlet pipe 3 is equidistantly provided with a third chlorine gas inlet 33, the inside of the chlorine gas outlet pipe 3 is provided with a rotating plate structure 34 which comprises 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 through the movable ring 343 penetrating through the chlorine gas outlet pipe 3, the upper surface and the lower surface of the movable ring 343 are movably connected with rotating beads to reduce the movable friction force, the rotating plate structure 34 further comprises an arc 344, an internal supporting frame 345 and a second fan blade 346, the arc 344 is equidistantly arranged on the outer wall of the first rotating ring 341, the position of the arc 344 corresponds to one end of the first fresh brine inlet pipe 11, the fresh brine in the first fresh brine inlet pipe 11 directly impacts the arc 344 to drive the arc 344 to rotate, thereby driving the first rotating ring 341 to rotate, the outer wall of the inner supporting frame 345 is fixedly connected with the inner wall of the second rotating ring 342, the second fan blade 346 is fixedly connected with the upper surface of the center of the inner supporting frame 345, the second rotating ring 342 drives the second fan blade 346 to rotate, the second fan blade 346 blows air to the upper end of the chlorine gas outlet pipe 3, negative pressure is formed in the chlorine gas outlet pipe 3, the position of the chlorine gas outlet pipe 3 close to the second chlorine gas inlet 32 is fixedly connected with the helical blade 35, after the first fresh brine inlet pipe 11 is sprayed out, the fresh brine flows to the packing layer 14 below through the helical blade 35, the helical blade 35 increases the flow path of the fresh brine, the upper end of helical blade 35 is arranged in the below of rotating plate structure 34, 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, through protruding piece 351, and the fresh brine is chosen to be high to splash, further improves the chloride ion and overflows in the fresh brine.
In order to better demonstrate the dechlorination process of the device for removing free chlorine in the weak brine, the embodiment now provides a dechlorination method of the device for removing free chlorine in the weak brine, which comprises the following steps:
step one: 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 into 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 drives the first fan blades 26 to rotate under the action of the liquid flow, so that the dilute brine and the hydrochloric acid are stirred, and the dilute 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, after the pH value exceeds a set range, the flow meter 162 is controlled to adjust the flow rate of hydrochloric acid, the pH value is ensured to be 1.5, and the added and discharged hydrochloric acid amount of the flow meter 162 is controlled by the pH value to realize automatic control;
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, and simultaneously 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 gas outlet pipe 3;
step five: the overflow chlorine from the dilute brine enters the chlorine gas outlet pipe 3 through the first chlorine gas inlet 31 and the second chlorine gas inlet 32 in the dechlorination tower 1, the dilute brine flows down to the filler layer 14 along the spiral blade 35, the convex blocks 351 further improve the splashing of the dilute brine and accelerate the chlorine gas overflow, and meanwhile, part of the chlorine gas below the filler layer 14 enters the chlorine gas outlet pipe 3 through the third chlorine gas inlet 33.
To sum up: according to the device and the method for removing free chlorine in the fresh brine, the mixing pipeline 2 is additionally arranged between the first fresh brine inlet pipe 11 and the second fresh brine inlet pipe 15, hydrochloric acid is added to the first fresh brine inlet pipe and the second fresh brine inlet pipe before the fresh brine enters the dechlorination tower 1 to adjust the pH value of the fresh brine, the automatic control is realized by controlling the amount of hydrochloric acid added and discharged through the flow meter 162 of the pH value, free chlorine in the fresh brine is removed again in the fresh brine inlet tower 1, so that the consumption of sodium sulfite is reduced, the guide plate 22 and the first fan blades 26 are arranged in the mixing pipeline 2, the mixed liquid is stirred and mixed, the mixing efficiency is improved, the rotating plate structure 34 is connected on the chlorine outlet pipe 3, the second fan blades 346 are driven to rotate by water pressure, negative pressure is formed in the chlorine outlet pipe 3, the chlorine is accelerated to be discharged, the flow path of the fresh brine is increased through the spiral blades 35, the fresh brine is raised through the raised blocks 351, the effect of spilling chlorine ions in the fresh brine is further improved, and the effect of removing the chlorine ions is improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (6)
1. The device for removing free chlorine in the weak brine comprises a dechlorination tower (1), and is characterized in that: one side of the upper end of the dechlorination tower (1) is fixedly connected with a first dilute brine inlet pipe (11), one end of the first dilute brine inlet pipe (11) is connected with a mixing pipeline (2) through a flange, one end of the first dilute 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 in the dechlorination tower (1), one end of the mixing pipeline (2) far away from the first dilute brine inlet pipe (11) is connected with a second dilute brine inlet pipe (15) through a flange, the side wall of the second dilute 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 in 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 center plate (23), and the center of the center plate (23) is connected with a guide column (24) in a penetrating way;
a sliding block (241) is fixedly connected to the side wall of the guide column (24), a limiting block (242) is fixedly connected to one end of the guide column (24), a spring (243) is fixedly connected to one side of the limiting block (242), the spring (243) is sleeved with the guide column (24), one end of the spring (243) is fixedly connected with one side of the central plate (23), a rotating shaft (25) is fixedly connected to the other end of the guide column (24), and a first fan blade (26) is fixedly connected to the rotating shaft (25);
the lower end of the chlorine gas outlet pipe (3) penetrates through the packing layer (14), a first chlorine gas inlet (31) is formed in the chlorine gas outlet pipe (3) close to the upper end at equal distance in a circle, a second chlorine gas inlet (32) which is distributed in a rotating way is formed in the chlorine gas outlet pipe (3) below the first chlorine gas inlet (31), a rotating plate structure (34) is movably connected on the chlorine gas outlet pipe (3) between the first chlorine gas inlet (31) and the second chlorine gas inlet (32), a third chlorine gas inlet (33) is formed in the chlorine gas outlet pipe (3) at equal distance in a circle at the lower end of the chlorine gas outlet pipe (3);
a spiral blade (35) is fixedly connected to the chlorine outlet pipe (3) close to the second chlorine inlet (32), the upper end of the spiral blade (35) is arranged below the rotating plate structure (34), and the lower end of the spiral blade (35) is flush with the upper surface of the filler layer (14);
the surface of the spiral blade (35) is provided with protruding blocks (351) in a dislocation mode, and the thickness of the lower ends of the protruding blocks (351) is larger than that of the upper ends.
2. A device for removing free chlorine from dilute brine according to claim 1, wherein: the first short pipe (12) and the second short pipe (16) are provided with electromagnetic valves (121), and the second short pipe (16) is provided with a check valve (161) and a flowmeter (162).
3. A device for removing free chlorine from 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), wherein the first rotating ring (341) and the second rotating ring (342) are connected through the movable ring (343) penetrating through the chlorine outlet pipe (3).
4. A device for removing free chlorine from dilute brine according to claim 3, wherein: the rotating plate structure (34) further comprises an arc-shaped plate (344), an inner supporting frame (345) and second fan blades (346), wherein 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 dilute brine 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 second fan blades (346) are fixedly connected to the upper surface of the center of the inner supporting frame (345).
5. A device for removing free chlorine from dilute brine according to claim 3, wherein: the upper and lower surfaces of the movable ring (343) are movably connected with rotating beads.
6. A method for dechlorination of a device for removing free chlorine from fresh brine according to any one of claims 1 to 5, comprising the steps of:
s1: the dilute brine enters from a second dilute brine inlet pipe (15), a flowmeter (162) controls a hydrochloric acid adding device (4) to add hydrochloric acid, and the dilute brine mixed with the hydrochloric acid enters into a 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 blades (26) are driven to rotate under the action of the liquid flow so as to stir the light brine and the hydrochloric acid, and the light 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), the pH value of the mixed solution is analyzed on line by a pH value on-line analyzer (13), and after the pH value exceeds a set range, a flowmeter (162) 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 (1) is sprayed onto the arc-shaped plate (344) under the impact of pressure to drive the first rotating ring (341) to rotate, and simultaneously 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: the chlorine overflows from the dilute brine in the dechlorination tower (1), enters the chlorine gas outlet pipe (3) through the first chlorine gas inlet (31) and the second chlorine gas inlet (32), the dilute brine flows down to the filler layer (14) along the spiral blade (35), the bulge block (351) further improves the splashing of the dilute brine, the chlorine gas overflows faster, and meanwhile part of the chlorine gas below the filler layer (14) enters the chlorine gas outlet pipe (3) through the third chlorine gas inlet (33).
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| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN112093842A CN112093842A (en) | 2020-12-18 |
| CN112093842B true CN112093842B (en) | 2023-06-30 |
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| CN109789917B (en) * | 2016-09-23 | 2022-03-01 | 懿华水处理技术有限责任公司 | Ballast water treatment and neutralization |
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| 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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| 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 |
| CN207632897U (en) * | 2018-03-22 | 2018-07-20 | 内蒙古瑞达泰丰化工有限责任公司 | Electrolytic brine dechlorination recycling system for producing potassium hydroxide |
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