A process for treating waste acid from chloromethylation mother liquor and a chlorination distillation vessel

Abstract

This invention discloses a process for treating waste acid from chloromethylation mother liquor and a chlorination distillation kettle. White spheres and a catalyst are added to the chloromethylation reaction to produce chlorine spheres, which are then separated into a water washing kettle. The mixture is cooled, and the distillate is allowed to settle, resulting in stratification. The upper distillate is used as recovered ether, and the lower distillate is used as recovered hydrochloric acid. The mixture is cooled again, filtered, and the mother liquor is collected in the chlorination distillation kettle. The mother liquor is evaporated and concentrated in the chlorination distillation kettle to obtain distillate two, which is used as recovered hydrochloric acid two. Alkali is added to the bottom liquid of the kettle for neutralization. The chlorination distillation kettle includes a main body and a stirring device. The stirring device is rotatably connected to the top of the main body, and an observation mirror is fixedly connected to the upper side of the main body near the stirring device. Cooling and settling processes within the distillation kettle allow for the secondary utilization of the waste acid and mother liquor generated after the chloromethylation reaction, reducing environmental pollution. The dual-mirror structure ensures that personnel can clearly observe the reaction inside the distillation kettle at any time.

Description

Technical Field

[0001] This invention relates to the field of chemical engineering, specifically to a process for treating waste acid from chloromethylation mother liquor and a chlorination distillation kettle. Background Technology

[0002] Ion exchange resins have a wide range of applications, especially in pure water treatment, where they can remove various anions and cations from water and reduce environmental pollution. The production process of ion exchange resins requires the use of a chloromethylation reaction in a distillation vessel to produce chlorine beads. The chloromethylation reaction produces chlorination mother liquor and waste acid. If these mother liquor and waste acid are not properly treated, they will cause environmental pollution. Therefore, it is necessary to treat the mother liquor and waste acid produced in the chloromethylation reaction in a chlorination distillation vessel.

[0003] When treating mother liquor and waste acid, it is necessary to observe the distillation of the internal reactants through an observation microscope. Currently, there is only one observation microscope in the existing chlorination distillation vessel. Once the observation microscope is dirty with reactants, it is easy to affect the judgment of the distillation situation inside the vessel and affect the reaction results. The observation microscopes are fixed on the distillation vessel and are not easy to clean after they get dirty. They are usually cleaned during the overall maintenance, which brings a lot of inconvenience to the staff. Summary of the Invention

[0004] The purpose of this invention is to provide a process for treating waste acid from chloromethylation mother liquor and a chlorination distillation kettle to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A process for treating waste acid from chloromethylation mother liquor, comprising the following steps: adding white spheres and a catalyst to the chloromethylation reaction to obtain chlorospheres.

[0007] S1: Separate the chlorine balls into the water washing tank;

[0008] S2: Cool down, let the distillate stand, and separate the layers; use the upper layer of distillate for ether recovery and the lower layer of distillate for hydrochloric acid recovery.

[0009] S3: Cool down again, filter and collect the mother liquor into the chlorination distillation kettle;

[0010] S4: The mother liquor is evaporated and concentrated in a chlorination distillation vessel to obtain distillate II, which is used as recovered hydrochloric acid II, and then neutralized with alkali in the bottom liquid.

[0011] Preferably, the chlorination distillation vessel includes a distillation vessel body and a stirring device, the stirring device being rotatably connected to the top of the distillation vessel body, and an observation mirror being installed on the upper side of the distillation vessel body near the stirring device.

[0012] Preferably, the observation scope includes a first observation scope body, an observation tube, an adjustment device, and a second observation scope body; the first observation scope body is located inside the adjustment device and is movably connected to the adjustment device; the second observation scope body is detachably connected to the top of the observation tube; the adjustment device is located inside the observation tube and is detachably connected to the observation tube.

[0013] Preferably, the sight glass body includes a sight glass and a fixing ring; the sight glass is fixedly connected to the middle of the inner wall of the fixing ring; an annular groove is provided along the middle of the outer wall of the fixing ring, and a pair of rotating shafts in the same axial direction are fixedly connected in the middle of the annular groove; the length of the rotating shafts does not exceed the outer circumference of the fixing ring.

[0014] Preferably, the adjusting device includes an adjusting block, a tension spring, and an adjusting plate; there are at least two adjusting blocks, and a tension spring is fixedly connected between every two adjacent adjusting blocks; the adjusting plate is fixedly connected to the outer periphery of the adjusting block; and "U"-shaped notches are provided on both sides of the adjusting plate.

[0015] Preferably, the adjusting block has connecting grooves on both sides to fix the two ends of the tension spring; the adjusting block includes a sealing plate, a snap-fit ​​plate, and an adjusting block body; there are at least two sealing plates, fixedly connected to the top and bottom of the adjusting block body; a protruding ring is fixedly connected to the outer wall of the sealing plate; there are at least two snap-fit ​​plates, fixedly connected to the top and bottom of the adjusting block body, and the snap-fit ​​plates are located inside the sealing plates; at least two adjusting block bodies have circular holes, such that the circular holes correspond to the position of the rotating shaft; the adjusting plate is located on the upper side of the outer wall of the adjusting block.

[0016] Preferably, the observation tube includes an observation tube body and a pair of lifting mechanisms; multiple slots are provided along the outer periphery of the middle part of the observation tube body, through which the adjustment plate can pass; lifting slots are provided on the upper and lower sides of the slots, and the pair of lifting mechanisms pass through the lifting slots and are inserted into the interior of the observation tube body.

[0017] Preferably, the lifting mechanism includes a lifting outer ring, a connecting rod, and a lifting inner ring; the connecting rod passes through the lifting groove and is fixedly connected to the lifting outer ring and the lifting inner ring;

[0018] The inner wall of the main body of the observation tube is hollowed out, and the size of the hollowed-out part matches the size of the adjustment block. Annular grooves are formed at the top and bottom of the hollowed-out part near the inner wall of the main body of the observation tube, and at least two convex rings are provided in the annular grooves. The lifting inner ring moves up and down in the annular grooves under the drive of the lifting outer ring. The inner wall of the lifting inner ring has at least two sealing grooves, which can be engaged with convex rings one and two. A snap-fit ​​ring is fixedly connected to the outer periphery of the main body of the observation tube. When the lifting outer ring, located on the upper side of the groove, moves to the upper side of the lifting groove, it engages with the snap-fit ​​ring.

[0019] Preferably, a sliding device is provided in the middle of the slot and the lifting groove. The sliding device includes multiple sliding blocks and a pushing part. The sliding blocks and the pushing part are fixedly connected. The sliding blocks can be inserted into the notches on both sides of the adjusting plate. The sliding blocks can be moved downward or upward so that the adjusting plate can move back and forth through the slot provided on the main body of the observation tube.

[0020] Preferably, each of the pair of rotating shafts is detachably connected to a rotating rod and rotatably connected to a fixed rod, with the rotating rod and fixed rod passing through the circular hole in the adjusting block and the main body of the observation tube; the rotating rod drives the main body of the viewing mirror to rotate, and the fixed rod and the rotating rod keep the central axis formed by the pair of rotating shafts horizontal.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] By cooling and settling filtration in a distillation kettle, the waste acid and mother liquor generated after the chloromethylation reaction are reused, reducing environmental pollution and production costs.

[0023] The dual-viewing-glass structure features a detachable and flip-up design. A dirty viewing glass can be flipped over, and the main body of the viewing glass can be removed for cleaning, ensuring that staff can clearly observe the reaction inside the distillation vessel at any time. Meanwhile, the lifting mechanism is connected to the annular groove, the adjusting device, and the slot of the main body of the viewing glass, and is completely sealed with a sealing strip. This allows for cleaning during the reaction process without affecting the reaction environment inside the distillation vessel. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the chlorination distillation vessel of the present invention;

[0025] Figure 2 This is a schematic diagram of the observation mirror of the present invention;

[0026] Figure 3 This is a cross-sectional view of the observation mirror of the present invention;

[0027] Figure 4 This is a schematic diagram of one part of the main structure of the sight glass of the present invention;

[0028] Figure 5 For the present invention Figure 4 Internal structure diagram at point A;

[0029] Figure 6 This is a schematic diagram of the structure of the adjusting device of the present invention;

[0030] Figure 7 For the present invention Figure 6 Schematic diagram of the structure at point B;

[0031] Figure 8This is a schematic diagram of the structure of the adjusting block in this invention;

[0032] Figure 9 This is a cross-sectional view of the main body of the sight glass and the adjustment device of the present invention;

[0033] Figure 10 This is a schematic diagram of the structure of the observation tube in this invention;

[0034] Figure 11 This is a schematic diagram of the lifting mechanism of the present invention;

[0035] Figure 12 This is a schematic cross-sectional view of the observation tube of the present invention;

[0036] Figure 13 This is a cross-sectional view of the main body of the observation tube of the present invention;

[0037] Figure 14 This is a schematic diagram of the structure of the sliding device of the present invention;

[0038] Figure 15 This is a schematic diagram showing the moving directions of the adjusting block and the sliding block in this invention;

[0039] Figure 16 This is an exploded view of the main body of the sight glass of the present invention.

[0040] Figure 17 This is a front view of the observation mirror of the present invention.

[0041] In the diagram: 1. Distillation vessel; 11. Distillation vessel body; 12. Sight glass; 21. Sight glass body one; 22. Observation cylinder; 23. Adjustment device; 24. Sight glass body two; 31. Sight glass; 32. Fixing ring; 33. Annular groove; 34. Rotating shaft; 41. Adjusting block; 411. Sealing plate; 412. Snap-fit ​​plate; 413. Adjusting block body; 42. Tension spring; 43. Adjusting plate; 51. Observation cylinder body; 511. Annular groove; 52. Lifting mechanism; 521. Lifting outer ring; 522. Connecting rod; 523. Lifting inner ring; 61. Sliding device; 611. Sliding block; 612. Pushing part; 71. Rotating rod. Detailed Implementation

[0042] Example 1:

[0043] Please see Figure 1-17 The present invention provides a technical solution:

[0044] A process for treating waste acid from chloromethylation mother liquor, comprising the following steps: adding white spheres and a catalyst to the chloromethylation reaction to obtain chlorospheres.

[0045] S1: Separate the chlorine balls into the water washing tank;

[0046] S2: Cool down, let the distillate stand, and separate the layers; use the upper layer of distillate for ether recovery and the lower layer of distillate for hydrochloric acid recovery.

[0047] S3: Cool down again, filter and collect the mother liquor into chlorination distillation vessel 1;

[0048] S4: The mother liquor is evaporated and concentrated in the chlorination distillation vessel 1 to obtain distillate 2, which is used as the recovered hydrochloric acid 2, and then neutralized with alkali in the bottom liquid.

[0049] Specifically, such as Figure 1-3 As shown, the chlorination distillation vessel 1 includes a distillation vessel body 11 and a stirring device. The stirring device is rotatably connected to the top of the distillation vessel body 11. An observation mirror 12 is installed on the upper side of the distillation vessel body 11 near the stirring device. The observation mirror 12 has a double-mirror structure, through which the specific reaction situation inside the distillation vessel 1 can be observed. The observation mirror 12 includes a first sight mirror body 21, an observation cylinder 22, an adjustment device 23, and a second sight mirror body 24. The first sight mirror body 21 is located inside the adjustment device 23 and is movably connected to the adjustment device 23. The second sight mirror body 24 is detachably connected to the top of the observation cylinder 22. A sealing gasket is placed between the bottom of the second sight mirror body 24 and the top of the observation cylinder 22 to ensure sealing. The adjustment device 23 is located inside the observation cylinder 22 and is detachably connected to the observation cylinder 22.

[0050] Specifically, such as Figure 4-5 As shown, the main body 21 of the sight mirror includes a sight mirror 31 and a fixing ring 32; the sight mirror 31 is fixedly connected to the middle of the inner wall of the fixing ring 32; an annular groove 33 is provided along the middle of the outer wall of the fixing ring 32, and a pair of rotating shafts 34 in the same axial direction are fixedly connected in the middle of the annular groove 33; the length of the rotating shaft 34 does not exceed the outer circumference of the fixing ring 32, and the rotating shaft 34 has a rack inside; the upper and lower inner surfaces of the annular groove 33 are provided with slots for engaging with the locking plate 412 of the adjustment device 23.

[0051] Specifically, such as Figure 6-9 As shown, the adjustment device 23 includes an adjustment block 41, a tension spring 42, and multiple adjustment plates 43; there are at least two adjustment blocks 41, and a tension spring 42 is fixedly connected between every two adjacent adjustment blocks 41; multiple adjustment plates 43 are evenly fixedly connected to the outer periphery of the adjustment block 41; and "U" shaped notches are provided on both sides of the adjustment plate 43.

[0052] The adjusting block 41 has connecting grooves on both sides, and the connecting grooves between every two adjacent adjusting blocks 41 are fixedly connected to the two ends of the tension spring 42. The adjusting block 41 includes a sealing plate 411, a snap-fit ​​plate 412, and an adjusting block body 413. There are at least two sealing plates 411, which are fixedly connected to the top and bottom of the adjusting block body 413. A protruding ring is fixedly connected to the outer wall of the sealing plate 411 for snap-fit ​​sealing with the lifting mechanism 52. There are at least two snap-fit ​​plates 412, which are fixedly connected to the top and bottom of the adjusting block body 413, and the snap-fit ​​plates 412 are located inside the sealing plate 411. The cross-section of the adjusting block body 413 is arc-shaped, and the corresponding sealing plate 411 and snap-fit ​​plate 412 are also arc-shaped. Multiple adjusting block bodies 413 can form a ring, which is adapted to the outer periphery of the sight mirror body 21. The corresponding sealing plate 411 and snap-fit ​​plate 412 can also form a ring. The part of the adjusting block body 413 located inside the sealing plate 411 matches the depth of the annular groove 33.

[0053] The snap-fit ​​plate 412 is snapped into the slot inside the sight glass body 21. The slot is equipped with a sealing strip to ensure sealing. At least two adjusting blocks 41 have round holes, which correspond to the position of the rotating shaft 34, so that the rotating shaft 34 can be inserted into the round holes. In this way, the rotating rod 71 can pass through the round holes and connect with the rotating shaft 34. The adjusting plate 43 is located on the upper side of the round hole on the outer wall of the adjusting block 41.

[0054] Specifically, such as Figure 10 As shown, the observation tube 22 includes an observation tube body 51 and a pair of lifting mechanisms 52; multiple slots are provided along the outer periphery of the middle part of the observation tube body 51, through which the adjusting plate 43 can pass; multiple lifting slots are provided on the upper and lower sides of the slots respectively, and the pair of lifting mechanisms 52 pass through the lifting slots and can move up and down along the lifting slots.

[0055] like Figure 11 As shown, the lifting mechanism 52 includes, from the outside to the inside, an outer lifting ring 521, a connecting rod 522, and an inner lifting ring 523; the connecting rod 522 passes through the lifting groove opened in the main body of the observation tube 51 and is fixedly connected to the outer lifting ring 521 and the inner lifting ring 523.

[0056] like Figure 12-13As shown, the inner wall of the observation tube body 51 is hollowed out, and the thickness and height of the hollowing out match the thickness and height of the adjusting block 41. Annular grooves 511 are provided at the top and bottom of the hollowing out near the inner wall of the observation tube body 51. The lifting inner ring 523 moves up and down along the annular groove 511 under the drive of the lifting outer ring 521. The inner wall of the lifting inner ring 523 has at least two sealing grooves, located near both ends of the lifting inner ring 523, which can be engaged with the first protruding ring on the outer wall of the sealing plate 411 and the second protruding ring in the annular groove 511. Sealing strips are provided in the sealing grooves to ensure sealing. There are at least two second protruding rings in the annular groove 511. Multiple annularly distributed snap-fit ​​rings are fixedly connected to the outer periphery of the observation tube body 51. When the lifting outer ring 523, located on the upper side of the groove, moves to the upper side of the lifting groove, the lifting outer ring 521 engages with the snap-fit ​​rings.

[0057] Specifically, such as Figure 14-16 As shown, a sliding device 61 is provided in the middle of the slot and the lifting slot. The sliding device 61 is slidably connected to the outer wall of the observation tube body 51. The sliding device 61 includes multiple sliding blocks 611 and a pushing part 612. The sliding blocks 611 and the pushing part 612 are fixedly connected. The pushing part 612 is used to push the sliding blocks 611 to move. A pair of pins are slidably connected to the upper side of the pushing part 612. The outer wall of the observation tube body 51 has a reserved hole corresponding to the pin. When the pin is slidably inserted, it positions the sliding device 61. The thickness of the sliding blocks 611 gradually increases from bottom to top. The number of sliding blocks 611 corresponds to the number of adjusting plates 43. The sliding blocks 611 can be inserted into the notches on both sides of the adjusting plates 43. In the initial state, the sliding block 611 is located on the upper side of the adjusting plate 43, and the bottom of the sliding block 611 corresponds to the notch of the adjusting plate 43 located outside the observation tube body 51. When the sliding block 611 is slid down, as the thickness of the sliding block 611 increases, it overcomes the elastic force of the tension spring 42, causing the adjusting plate 43 to gradually move towards the outside of the observation tube body 51, and the adjusting block 41 is pulled out of the annular groove 33. When the sliding block 611 is moved in the opposite direction, the adjusting plate 43 moves towards the inside of the observation tube body 51, and the adjusting block 41 is inserted into the annular groove 33.

[0058] like Figure 16-17 As shown, one of the pair of rotating shafts 34 is internally connected to a rotating rod 71 via a rack. The rotating rod 71 is Z-shaped, with one end away from the rack passing through the adjusting block 41 and the observation tube 51 and located outside the viewing mirror 12. The other rotating shaft is rotatably connected to a fixing rod, which extends outward through the adjusting block 41 and the observation tube 51. When the adjusting block 41 is pulled out of the annular groove 33, the viewing mirror body 21 can move. Rotating the rotating rod 71 can cause the viewing mirror body 21 to flip. At the same time, the fixing rod and the rotating rod 71 keep the central axis formed by the pair of rotating shafts 34 horizontal, making the flipping of the viewing mirror body 21 more flexible.

[0059] During operation: The installed sight glass 12 is in a sealed state. When too much foreign matter or impurities from the distillation vessel body 11 adhere to the lower side of the sight glass 31, it affects the operator's observation of the reaction inside the distillation vessel body 11. At this time, the operator can hold the upper lifting mechanism 52 and move it upwards until it is locked in place with the locking ring, and hold the lower lifting mechanism 52 and move it downwards. However, after moving, the sealing groove on the inner wall of the inner ring 523 continues to lock and seal with the convex ring 2 in the annular groove 511, keeping the inside of the distillation vessel 1 separated from the sight glass 31. Even when the distillation vessel 1 is in operation, it remains sealed and will not affect the internal reaction environment. Then push the sliding device 61 downwards, so that the sliding block 611 continuously inserts downwards into the notch of the adjusting plate 43. As the thickness of the sliding block 61 gradually increases from bottom to top, the notch is pushed outwards by the continuous insertion of the sliding block 611. The adjusting plate 43 then moves towards the outer wall of the observation cylinder body 51, causing the adjusting block 41 to spread outwards, and the tension spring 42 is stretched (see Figure 16 Because the tension spring 42 is fixedly connected to the adjusting block 41, the adjacent adjusting block bodies 413 are not directly attached but not completely disconnected to facilitate subsequent repositioning. At the same time, the pin is inserted into the reserved hole to fix the position of the sliding block 61 at this time. As the adjusting plate 43 moves, the adjusting block 41 is completely moved out of the annular groove 33. The rotating rod 71 can then be rotated to turn the side of the sight glass 31 with foreign objects on the lower side to the upper side, completing the flipping of the sight glass 31. Then, the pin is pulled out and the sliding device 61 is pushed upward in the opposite direction to control the sliding block 611 to gradually exit the notch. Under the restoring force of the tension spring 41, the adjusting plate 43 re-enters the observation tube body 51 until the sealing plate 411 of the adjusting block 41 and the inner wall of the adjusting block 41 are completely matched with the annular groove 33. The locking plate 412 is locked and connected to the groove, and the adjacent adjusting plates are locked and connected. When the main body 413 is in direct contact again, the adjusting block 41 positions the flipped sight glass 31, and then the upper lifting mechanism 52 is moved down and the lower lifting mechanism 52 is moved up to return to its original position. This causes one of the sealing grooves on the inner side of the lifting inner ring 523 to engage with the protruding ring on the outer wall of the sealing plate 411, and the other sealing strip to engage with the annular groove 511 to seal the sight glass. This prevents reactants or gases in the distillation vessel body 11 below the sight glass 31 from entering the upper side of the sight glass 31, and also prevents them from leaking out of the observation tube body 51 through the annular groove 511. When the adjusting device 23 is inserted into the sight glass body 1 21, the engaging plate 412 engages with the slot in the fixing ring 32. The slot is also equipped with a sealing strip to ensure sealing. Then, the sight glass body 24 is opened, foreign objects on the sight glass 31 are cleaned, and then the sight glass body 24 is closed again.

[0060] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A chlorination rectifier still characterized by: Including rectifying kettle main body (11) and stirring device, stirring device rotation connects rectifying kettle main body (11) top, near the stirring device place rectifying kettle main body (11) upper side installs observation sight glass (12); The observation sight glass (12) includes a sight glass body (21), an observation cylinder (22), an adjusting device (23), and a second sight glass body (24). The sight glass body (21) is located inside the adjusting device (23) and is movably connected with the adjusting device (23). The second sight glass body (24) is detachably connected to the top of the observation cylinder (22). The adjusting device (23) is located inside the observation cylinder (22) and is detachably connected with the observation cylinder (22). The sight glass body (21) includes a sight glass (31) and a fixed ring (32). The sight glass (31) is fixedly connected to the inner wall of the fixed ring (32). An annular groove (33) is provided along the middle part of the outer wall of the fixed ring (32). A pair of rotating shafts (34) are fixedly connected to the middle part of the annular groove (33) and are in the same axial direction. The length of the rotating shaft (34) is not more than the outer circumference of the fixed ring (32). The adjusting device (23) includes an adjusting block (41), a tension spring (42), and an adjusting plate (43). There are not less than two adjusting blocks (41), and a tension spring (42) is fixedly connected between every two adjacent adjusting blocks (41). The adjusting plate (43) is fixedly connected to the outer circumference of the adjusting block (41). The adjusting plate (43) is provided with a "U"-shaped notch on both sides. The adjusting block (41) is provided with a connecting groove on both sides, and the two ends of the tension spring (42) are fixedly connected. The adjusting block (41) includes a sealing plate (411), a clamping plate (412), and an adjusting block body (413). There are not less than two sealing plates (411) fixedly connected to the top and bottom of the adjusting block body (413). The outer wall of the sealing plate (411) is fixedly connected with a convex ring one. There are not less than two clamping plates (412) fixedly connected to the top and bottom of the adjusting block body (413), and the clamping plate (412) is located inside the sealing plate (411). There are not less than two adjusting block bodies (413) provided with a circular hole corresponding to the position of the rotating shaft (34). The adjusting plate (43) is located on the upper side of the outer wall of the adjusting block (41). The observation cylinder (22) includes an observation cylinder body (51) and a pair of lifting mechanisms (52). A plurality of slot holes are provided along the middle part of the outer circumference of the observation cylinder body (51), which can allow the adjusting plate (43) to pass through. The upper side and the lower side of the slot hole are provided with a lifting groove, and a pair of lifting mechanisms (52) pass through the lifting groove and are inserted into the inside of the observation cylinder body (51).

2. A chlorination rectifier kettle as claimed in claim 1, wherein: The lifting mechanism (52) includes a lifting outer ring (521), a connecting rod (522), and a lifting inner ring (523). The connecting rod (522) fixedly connects the lifting outer ring (521) and the lifting inner ring (523) through the lifting groove. The middle inner wall part of the observation cylinder body (51) is hollowed out, and the hollowed-out size matches the size of the adjusting block (41); annular grooves (511) are arranged at the top and bottom of the hollowed-out part close to the inner wall of the observation cylinder body (51), and not less than two convex rings are arranged in the annular grooves (511); the lifting inner ring (523) moves up and down on the annular grooves (511) under the driving of the lifting outer ring (521); the inner wall of the lifting inner ring (523) is provided with not less than two sealing grooves, which can be connected with the convex ring one and the convex ring two; the observation cylinder body (51) is fixedly connected with a clamping ring outside the periphery, and the lifting outer ring (521) located on the upper side of the slot hole is clamped and connected with the clamping ring when moving to the upper side of the lifting groove.

3. A chlorination rectifier kettle as claimed in claim 2, wherein: A sliding device (61) is arranged in the middle part of the slot hole and the lifting groove, the sliding device (61) includes a plurality of sliding blocks (611) and a pushing part (612), the sliding blocks (611) and the pushing part (612) are fixedly connected, and the sliding blocks (611) can be inserted into the notches on both sides of the adjusting plate (43); the sliding blocks (611) are moved downward or upward, so that the adjusting plate (43) moves back and forth through the slot hole arranged on the observation cylinder body (51).

4. A chlorination rectifier kettle as claimed in claim 2, wherein: A pair of the rotating shafts (34) are respectively detachably connected with rotating rods (71) and fixed rods, the rotating rods (71) and the fixed rods penetrate the circular holes of the adjusting block (41) and the observation cylinder body (51); the mirror body one (21) is rotated by the rotating rods (71), and the central axis formed by the pair of rotating shafts (34) is kept horizontal by the fixed rods and the rotating rods (71).

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