Production process of anti-dripping flame retardant

Abstract

The invention discloses a production process of an anti-dripping flame retardant, and relates to the technical field of flame retardant production. The production process of the anti-dripping flame retardant comprises the following steps: S1, substitution: after checking that production equipment is in a normal state, firstly adding slightly excessive PC13 into a substitution reaction kettle according to a ratio, stirring, and checking that a process gas recovery system is in a normal state again. According to the production process of the anti-dripping flame retardant, the introduced chlorine is more uniform and sufficient, the chlorination efficiency can be improved, and the effect is better; the opening height range of the air outlet hole can be conveniently adjusted according to the height of the liquid level in the chlorination kettle, chlorine is ensured to be directly introduced into liquid and prevented from directly entering the position above the liquid level, the reaction efficiency and effect are ensured, and the utilization rate of the chlorine is ensured; the color of liquid at different depths can be conveniently sampled and detected, the device is more convenient, quicker, more accurate and more reliable, the accuracy of judging the reaction process is improved, and the reaction efficiency and effect are further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of flame retardant production, in particular to a production process of an anti-dripping flame retardant. Background Art

[0002] The production process of anti-drip flame retardant mainly includes key steps such as raw material preparation, reaction preparation, processing and packaging. During the reaction preparation, it mainly includes substitution, chlorination, addition, washing, fluorination and three-stage distillation operations. During chlorination, the substituted material needs to be transported to the chlorination device and chlorine gas is introduced to realize the chlorination operation. In addition, during the chlorination process, it is necessary to observe the state of the material. When the material changes from yellow-green and turbid to colorless, and then becomes transparent, it means that the reaction is almost complete.

[0003] However, in the existing production process of anti-drip flame retardant, during the chlorination process, the chlorine gas introduced is not uniform and sufficient, and the adjustment affects the efficiency of chlorination. At the same time, it is not convenient to adjust the ventilation range according to the height of the liquid level, so that part of the chlorine gas is directly above the liquid level, resulting in a low utilization rate of chlorination; during the reaction process, it is not convenient to observe the color of the material. At the same time, the material may be uneven, which affects the observation effect, affects the judgment of the reaction progress, and further affects the efficiency and effect of the reaction. Summary of the invention

[0004] The object of the present invention is to provide a production process of an anti-dripping flame retardant to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a production process of an anti-dripping flame retardant, comprising the following steps: S1: Substitution: After checking that the production equipment is in normal condition, first add a slightly excessive amount of PCl3 into the substitution reactor according to the ratio, stir, and then check that the process gas recovery system is normal again, and then add pentaerythritol in batches according to the ratio. After sufficient stirring, heat up and start the reaction. After the pentaerythritol is basically reacted, the first intermediate RX-tetrafluoro V100 is obtained by reaction. Then, open the vacuum, evaporate the remaining PCl3 for recovery (apply to the next batch of production), and after the PCl3 is recovered, cool the materials in the substitution reactor; S2: Chlorination: The substituted material is transported to the chlorination device for chlorination treatment to obtain the second intermediate RX-tetrafluoroethylene V100. After confirming that the reaction is complete, the material in the chlorination device is transported to the addition reactor; S3: Addition: Add titanium tetrachloride as a catalyst to the addition reactor under vacuum, and slowly add propylene oxide dropwise under the liquid after returning to normal pressure. When the addition of propylene oxide is nearly complete, the temperature in the addition reactor begins to slowly drop, and the cooling is turned off. After stirring and continuing the reaction for several minutes, the temperature is raised, and 1,2-dichloroethane is recovered under normal pressure, and the temperature is kept to ensure that the 1,2-dichloroethane is completely recovered. The industrial grade RX-V100 is obtained by reaction, and the materials in the reactor are transported to the alkali washing reactor; S4: Washing: Start the alkali washing kettle and stir, add soda ash and water according to the ratio, slowly heat up to 70℃, stop stirring, let stand for 1h, separate the layers, and transport the water layer to the sewage device in the factory for treatment. After washing, the nearly neutral material layer is transported to the water washing kettle, start the water washing kettle and stir, add water according to the ratio, slowly heat up to 70℃, stop stirring, let stand for 1h, separate the layers, and transport the water layer to the sewage device in the factory for treatment; S5: Fluorosynthesis: The material layer obtained by secondary water washing and stratification is transported to the fluorosynthesis kettle, stirred at high speed, and tetrafluoroethylene suspension is slowly added according to the proportion. After the addition is completed, stirring is continued for 0.5 to 1 hour to allow the material molecules to fully chain-link to form a uniform and stable industrial-grade RX-V100 crude liquid, and then the liquid is transported to the three-stage distillation system; S6: Three-stage distillation: about 5% TCPP with a lower boiling point brought into the industrial-grade RX-V100 crude liquid is distilled out from the top of the tower, so that the TCPP content in the product in the bottom of the tower is reduced to ≤50ppm. The three-stage distillation uses a small amount of medium-pressure steam to directly contact and strip the material for further light removal and purification (to ensure the removal of trace impurities caused by materials and operation fluctuations during the production process). The TCPP content in the final product is ≤50ppm, and a high-purity RX-tetrafluoroethylene V100 anti-drip flame retardant product is obtained.

[0006] Preferably, in step S1, during the reaction, the heating rate is controlled to gradually increase the temperature in the kettle to 80-90°C, and the duration of the entire heating reaction process is controlled to be about 8 hours. After the PCl3 is recovered, the material in the kettle is cooled to below 70°C.

[0007] Preferably, in step S1, HCl produced during the reaction is absorbed by water to produce by-product hydrochloric acid.

[0008] Preferably, in step S2, before conveying the material in S1 to the chlorination device, an appropriate amount of 1,2-dichloroethane is added to the material and stirred evenly.

[0009] Preferably, in step S3, when propylene oxide is added dropwise, cooling water is adjusted to control the reaction temperature in the kettle at 40°C.

[0010] Preferably, in step S3, the heating temperature is 90° C. and the insulation time is 1 hour.

[0011] Preferably, in step S4, when the water separation effect is poor, the intermediate product with unqualified water separation can be distilled and dehydrated to control the moisture content of the material to meet the process requirements.

[0012] Preferably, in step S6, the no-load vacuum of the primary and secondary distillations is required to be ≤5Pa, and the distillation temperature is controlled at 100-110°C (TCPP≤500ppm after distillation) for the primary distillation and 110-120°C (TCPP≤100ppm after distillation) for the secondary distillation.

[0013] Preferably, in step S6, after the distillation is completed, the following steps are further included: The tower bottom is cooled, inspected (moisture content is regulated), filled and stored, and the light components at the top of the tower are recovered according to the fraction temperature section, and a small amount of TCPP and RX-V100 with a content of ≥95% are produced as by-products.

[0014] Preferably, the chlorination device comprises a chlorination kettle, and the chlorination kettle comprises a feed valve and a discharge valve, the top of the chlorination kettle is connected to a rotating rod through a driving mechanism, and the side wall of the rotating rod is fixedly connected to a plurality of connecting plates arranged in an array, the bottom of the connecting plate is fixedly connected to a plurality of hollow stirring tubes, and the side wall of the stirring tube is provided with a plurality of groups of air outlet holes arranged in an array, the number of the air outlet holes in each group is multiple, and a first one-way valve is arranged in each air outlet, an air supply pipe is fixedly inserted in the rotating rod, and an L-shaped plate is fixedly connected to the top of the chlorination kettle, a first connecting pipe is fixedly inserted in the top of the L-shaped plate, and the lower end of the first connecting pipe is rotatably connected to the upper end of the air supply pipe, the upper end of the first connecting pipe is fixedly connected to the air supply valve, and a plurality of fixed pipes arranged in an array are fixedly inserted in the side wall of the rotating rod, one end of the fixed pipe passes through the rotating rod and is fixed to the side wall of the air supply pipe, and a second connecting pipe is fixedly connected between the top of each stirring tube and the fixed pipe; A plurality of annular plates arranged in an array are slidably connected in each of the stirring tubes, and a limiting mechanism for limiting the annular plates is provided in the stirring tube, the movement of the annular plates is pushed by a pushing mechanism, and the side wall of the stirring tube is connected to a first movable plate through a lifting mechanism, the side wall of the first movable plate is fixedly connected to a plurality of mounting plates, the mounting plate slides on the side wall of the stirring tube, and a sampling cover is fixedly connected to the top of each mounting plate, a first movable block is connected in the sampling cover through a reset mechanism, the movement of the first movable block is pushed by a pushing assembly, and the top of the sampling cover is a transparent plate, a liquid inlet pipe and a liquid outlet pipe are fixedly connected to the side wall of the sampling cover, a second one-way valve is provided in the liquid inlet pipe, a third one-way valve is provided in the liquid outlet pipe, and the other end of the liquid inlet pipe is rotatably connected to a rotating tube, an inclined tube is fixedly connected to the end of the rotating tube, and the rotation of the rotating tube is driven by a driving assembly, a protective cover is fixedly connected to the top of the transparent plate, and a white light lamp and a visual sensor are fixedly connected in the protective cover; The reset mechanism comprises two symmetrically arranged first T-shaped guide rods fixedly connected to the side wall of the first moving block, and the side wall of the first T-shaped guide rod is sleeved with a connecting block, the lower end of the connecting block is fixed to the top of the mounting plate, and the side wall of each first T-shaped guide rod is sleeved with a first spring; The pushing assembly includes a first pushing rod fixedly inserted in the side wall of the sampling cover, and one end of the first pushing rod is fixed to the side wall of the first moving block, the side wall of the stirring tube is fixedly connected to a plurality of mounting blocks arranged in an array, and the side wall of the mounting block is fixedly connected to a flat plate, the bottom of the flat plate is fixedly connected to a first inclined plate, and the top of the flat plate is fixedly connected to a second inclined plate; The driving assembly includes a spiral groove opened on the side wall of the rotating tube, and the side wall of the first moving block is fixedly connected to an L-shaped block, the side wall of the L-shaped block is fixedly connected to a push pin, and the other end of the push pin is inserted into the spiral groove; The pushing mechanism includes a second movable plate, and the second movable plate is connected to the side wall of the stirring tube through a lifting assembly, a fixed block is fixedly connected to the top of the second movable plate, and two symmetrically arranged second T-shaped guide rods are inserted into the side wall of the fixed block, one end of the second T-shaped guide rod is fixedly connected to the pushing block, and the pushing block includes a first inclined surface and a second inclined surface, the side wall of each second T-shaped guide rod is sleeved with a first return spring, and the inner side wall of each annular plate is fixedly connected to a stopper; The limiting mechanism includes a first limiting hole and a second limiting hole opened on the inner side wall of the annular plate, and the inner side wall of the stirring tube is fixedly connected with a first baffle, the side wall of the first baffle is inserted with two symmetrically arranged third T-shaped guide rods, and the end of the third T-shaped guide rod is fixedly connected with a second moving block, the side wall of the second moving block is fixedly connected with a limiting pin, and the inner side wall of the stirring tube is fixedly connected with a second baffle, and the side wall of each of the third T-shaped guide rods is sleeved with a second return spring; The lifting assembly includes two symmetrically arranged guide rods fixedly connected in the stirring tube, and the side wall of each guide rod is sleeved with a second spring, the second movable plate is sleeved on the side wall of the guide rod, and a winding wheel is rotatably connected to each stirring tube through a first rotating shaft, the side wall of the winding wheel is fixedly connected to a first pull rope, and the lower end of the first pull rope is fixed to the top of the second movable plate, the side wall of the stirring tube is fixedly connected to a first motor, and the output end of the first motor is fixed to one end of the first rotating shaft; The lifting mechanism includes a second pull rope in an annular shape inserted in the side wall of each stirring tube, and the first movable plate is fixedly sleeved on the side wall of the second pull rope, the top of each connecting plate is fixedly connected to two symmetrically arranged support blocks, and the opposite side walls of the two support blocks are rotatably connected to the driving rollers through the second rotating shaft, the second pull rope is inserted between the two driving rollers and abuts against them, the side wall of the support block is fixedly connected to the second motor, and the output end of the second motor is fixed to one end of the second rotating shaft; The driving mechanism includes a gear ring fixedly sleeved on the side wall of the rotating rod, and the top of the chlorination kettle is fixedly connected with a U-shaped frame, the top of the U-shaped frame is fixedly connected with a third motor, the output end of the third motor is fixedly connected with a gear, and the gear is meshed with the gear ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The production process of the anti-drip flame retardant is provided with a pushing mechanism and a limiting mechanism, etc., when the chlorination reaction is carried out, the material is put into the chlorination kettle through the feed valve, then the third motor is started, the rotation of the third motor drives the rotation of the gear, thereby driving the rotating rod to rotate, and then driving the stirring tube to rotate through the connecting plate, and at the same time, the air supply valve is opened, at this time, the chlorine gas can enter the stirring tube through the first connecting tube, the air supply tube, the fixed tube and the second connecting tube, and enter the material through the air outlet, so that the introduced chlorine gas is more uniform and sufficient, and the efficiency and effect of chlorination can be improved. In addition, by starting the first motor, the rotation of the first motor drives the rotation of the first rotating shaft and the winding wheel, so that the first pull rope can be wound up, and then the second movable plate can be pulled to move upward along the guide rod. At the same time, the second spring is compressed, and when the first inclined surface abuts against the side wall of the block, the annular plate can be pushed to move upward. At the same time, the limiting pin slides out of the second limiting hole and slides on the inner wall of the annular plate. The second reset spring is compressed, and when the annular plate abuts against the bottom of the first baffle, The limit pin is aligned with the first limit hole. Under the action of the second return spring, the limit pin can be inserted into the second limit hole for limiting. At this time, the annular plate can be limited. At the same time, the group of air outlet holes can be opened, and the push block can be pushed to gradually move in the direction close to the fixed block. At the same time, the first return spring is gradually compressed so that the push block can pass over the block. When the push block passes over the block, the push block can move and reset under the action of the first return spring. When the first motor is reversed, the second movable plate can move downward and reset under the action of the second spring. When the second inclined surface abuts against the block, the annular plate can be pushed to move downward. When the annular plate is driven to abut against the top of the second baffle, the push block can pass over the block. At the same time, the limit pin is inserted into the second limit hole for limiting. At this time, the group of air outlet holes can be closed. This reciprocating process can be used to adjust the opening height range of the air outlet according to the height of the liquid level in the chlorination kettle to ensure that chlorine gas directly passes into the liquid and avoids chlorine gas directly entering above the liquid level, thereby ensuring the efficiency and effect of the reaction and ensuring the utilization rate of chlorine gas.

[0016] The production process of the anti-drip flame retardant is provided with a plurality of sampling covers, etc. During the reaction, when the color of the liquid needs to be detected, the second motor is started, and the rotation of the second motor drives the rotation of the second rotating shaft and the driving roller, so that the first movable plate can be driven to move upward through the second pull rope, and at the same time, the mounting plate can drive the sampling cover to move upward synchronously, when the end of the first push rod slides along the first inclined plate to the side wall of the flat plate, the first movable block can be pushed to move in the direction away from the sampling cover, and at the same time, the first spring is compressed, the second one-way valve is opened, and the third one-way valve is closed, at this time, the liquid can be drawn into the sampling cover through the inclined tube, the rotating tube and the liquid inlet tube, the white light is turned on, and the color of the liquid is detected by the visual sensor, and when the first push rod slides along the flat plate to the side wall of the second inclined plate and is separated from the second inclined plate, the first movable block can be moved and reset under the action of the first spring, so as to squeeze the liquid in the sampling cover, and at the same time, the second one-way valve is closed, and the third one-way valve is opened, so that the liquid in the sampling cover is squeezed back into the chlorination kettle through the liquid outlet pipe, Thereby, it is convenient to sample and detect the color of liquid at different depths, which is more convenient, quick, accurate and reliable, improves the accuracy of judging the reaction process, and thus ensures the efficiency and effect of the reaction. At the same time, when extracting liquid, when the first moving block moves, it can drive the pushing pin to slide in the spiral groove through the L-shaped block, thereby driving the rotating tube and the inclined tube to rotate, so that the sampling is more uniform and the effect is better, thereby ensuring the accuracy of the test result, and when the second motor is reversed, it can drive the driving roller to reverse, thereby driving the mounting plate to move downward through the second pull rope, and then moving downward through the mounting plate and the sampling cover. At this time, sampling operation can also be carried out to ensure that sampling and detection can be achieved during the upward and downward movement of the sampling cover, so that the detection efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the process flow of the present invention.

[0018] Figure 2 It is a schematic diagram of the overall structure of the chlorination device in the present invention.

[0019] Figure 3 It is a partial cross-sectional structural schematic diagram of the chlorination kettle in the present invention.

[0020] Figure 4 It is a structural schematic diagram of the stirring tube in the present invention.

[0021] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the stirring tube in the present invention.

[0022] Figure 6 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0023] Figure 7 for Figure 3 Schematic diagram of the enlarged structure at point B in the middle.

[0024] Figure 8 for Figure 5 Schematic diagram of the enlarged structure at point C in the middle.

[0025] Fig. 9 for Figure 5 Schematic diagram of the enlarged structure at D in the middle.

[0026] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure at E in the middle.

[0027] Fig.11 for Fig. 9 Schematic diagram of the enlarged structure at F in the middle.

[0028] In the figure: 1, chlorination kettle; 101, feed valve; 102, discharge valve; 201, first T-shaped guide rod; 202, connecting block; 203, first spring; 301, first push rod; 302, mounting block; 303, flat plate; 304, first inclined plate; 305, second inclined plate; 401, spiral groove; 402, L-shaped block; 403, push pin; 501, first limit hole; 502, second limit hole; 50 3. First baffle plate; 504. Third T-shaped guide rod; 505. Second moving block; 506. Stop pin; 507. Second return spring; 508. Second baffle plate; 601. Block; 602. Second moving plate; 603. Fixed block; 604. Second T-shaped guide rod; 605. Push block; 606. First inclined plane; 607. Second inclined plane; 608. First rotating shaft; 609. Winding wheel; 610. First pull rope ; 611, first motor; 612, first return spring; 701, guide rod; 702, second spring; 703, second pull rope; 704, support block; 705, second rotating shaft; 706, second motor; 707, driving roller; 8, rotating rod; 9, connecting plate; 10, stirring tube; 11, air outlet; 12, annular plate; 13, first moving plate; 14, mounting plate; 15, sampling cover; 1501, through Bright plate; 16, first moving block; 17, liquid inlet pipe; 18, liquid outlet pipe; 19, rotating pipe; 20, inclined pipe; 21, air supply pipe; 22, fixed pipe; 23, second connecting pipe; 24, L-shaped plate; 25, first connecting pipe; 2601, gear ring; 2602, U-shaped frame; 2603, third motor; 2604, gear; 27, air supply valve; 28, protective cover; 29, white light; 30, visual sensor. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 11 The present invention provides a technical solution: a production process of an anti-dripping flame retardant, comprising the following steps: S1: Substitution: After checking that the production equipment is in normal condition, first add a slightly excessive amount of PCl3 into the substitution reactor according to the ratio, stir, and then check that the process gas recovery system is normal again, and then add pentaerythritol in batches according to the ratio. After sufficient stirring, heat up and start the reaction. After the pentaerythritol is basically reacted, the first intermediate RX-tetrafluoro V100 is obtained by reaction. Then, open the vacuum, evaporate the remaining PCl3 for recovery (apply to the next batch of production), and after the PCl3 is recovered, cool the materials in the substitution reactor; S2: Chlorination: The substituted material is transported to the chlorination device for chlorination treatment to obtain the second intermediate RX-tetrafluoroethylene V100. After confirming that the reaction is complete, the material in the chlorination device is transported to the addition reactor; S3: Addition: Add titanium tetrachloride as a catalyst to the addition reactor under vacuum, and slowly add propylene oxide dropwise under the liquid after returning to normal pressure. When the addition of propylene oxide is nearly complete, the temperature in the addition reactor begins to slowly drop, and the cooling is turned off. After stirring and continuing the reaction for several minutes, the temperature is raised, and 1,2-dichloroethane is recovered under normal pressure, and the temperature is kept to ensure that the 1,2-dichloroethane is completely recovered. The industrial grade RX-V100 is obtained by reaction, and the materials in the reactor are transported to the alkali washing reactor; S4: Washing: Start the alkali washing kettle and stir, add soda ash and water according to the ratio, slowly heat up to 70℃, stop stirring, let stand for 1h, separate the layers, and transport the water layer to the sewage device in the factory for treatment. After washing, the nearly neutral material layer is transported to the water washing kettle, start the water washing kettle and stir, add water according to the ratio, slowly heat up to 70℃, stop stirring, let stand for 1h, separate the layers, and transport the water layer to the sewage device in the factory for treatment; S5: Fluorosynthesis: The material layer obtained by secondary water washing and stratification is transported to the fluorosynthesis kettle, stirred at high speed, and tetrafluoroethylene suspension is slowly added according to the proportion. After the addition is completed, continue stirring for 0.5 to 1 hour (high speed ~ static ~ low speed stirring for several rounds) to allow the material molecules to fully chain together to form a uniform and stable industrial grade RX-V100 crude liquid, and then transport the liquid to the three-stage distillation system; S6: Three-stage distillation: about 5% TCPP with a lower boiling point brought into the industrial-grade RX-V100 crude liquid is distilled out from the top of the tower, so that the TCPP content in the product in the bottom of the tower is reduced to ≤50ppm. The three-stage distillation uses a small amount of medium-pressure steam to directly contact and strip the material for further light removal and purification (to ensure the removal of trace impurities caused by materials and operation fluctuations during the production process). The TCPP content in the final product is ≤50ppm, and a high-purity RX-tetrafluoroethylene V100 anti-drip flame retardant product is obtained.

[0031] Preferably, in step S1, during the reaction, the heating rate is controlled to gradually increase the temperature in the kettle to 80-90°C, and the duration of the entire heating reaction process is controlled to be about 8 hours. After the PCl3 is recovered, the material in the kettle is cooled to below 70°C.

[0032] Preferably, in step S1, HCl produced during the reaction is absorbed by water to produce by-product hydrochloric acid.

[0033] Preferably, in step S2, before conveying the material in S1 to the chlorination device, an appropriate amount of 1,2-dichloroethane is added to the material and stirred evenly.

[0034] Preferably, in step S3, when propylene oxide is added dropwise, cooling water is adjusted to control the reaction temperature in the kettle at 40°C.

[0035] Preferably, in step S3, the heating temperature is 90° C. and the insulation time is 1 hour.

[0036] Preferably, in step S4, when the water separation effect is poor, the unqualified intermediate product can be distilled and dehydrated to control the moisture content of the material to meet the process requirements (the evaporated water and the stratified wastewater are transported together to the sewage device in the factory for treatment).

[0037] Preferably, in step S6, the no-load vacuum of the primary and secondary distillations is required to be ≤5Pa, and the distillation temperature is controlled at 100-110°C (TCPP≤500ppm after distillation) for the primary distillation and 110-120°C (TCPP≤100ppm after distillation) for the secondary distillation.

[0038] Preferably, in step S6, after the distillation is completed, the following steps are further included: The tower bottom is cooled, inspected (moisture content is regulated), filled and stored, and the light components at the top of the tower are recovered according to the fraction temperature section, and a small amount of TCPP and RX-V100 with a content of ≥95% are produced as by-products.

[0039] The chlorination device comprises a chlorination kettle 1, and the chlorination kettle 1 comprises a feed valve 101 and a discharge valve 102. The top of the chlorination kettle 1 is connected with a rotating rod 8 through a driving mechanism, and the side wall of the rotating rod 8 is fixedly connected with a plurality of connecting plates 9 arranged in an array, and the bottom of the connecting plate 9 is fixedly connected with a plurality of hollow stirring tubes 10 arranged, and the side wall of the stirring tube 10 is provided with a plurality of groups of air outlet holes 11 arranged in an array, and the number of each group of air outlet holes 11 is a plurality, and each air outlet hole 11 is provided with a first one-way valve, and the conduction direction of the first one-way valve is from the inside to the outside of the stirring tube 10, and the rotating rod 8, an air supply pipe 21 is fixedly inserted in the chlorination kettle 1, and an L-shaped plate 24 is fixedly connected to the top of the chlorination kettle 1, a first connecting pipe 25 is fixedly inserted in the top of the L-shaped plate 24, and the lower end of the first connecting pipe 25 is rotatably connected to the upper end of the air supply pipe 21, and the upper end of the first connecting pipe 25 is fixedly connected to the air supply valve 27, and a plurality of fixed pipes 22 arranged in an array are fixedly inserted in the side wall of the rotating rod 8, one end of the fixed pipe 22 passes through the rotating rod 8 and is fixed to the side wall of the air supply pipe 21, and a second connecting pipe 23 is fixedly connected between the top of each stirring tube 10 and the fixed pipe 22; A plurality of annular plates 12 arranged in an array are slidably connected in each stirring tube 10, and a limiting mechanism for limiting the annular plates 12 is provided in the stirring tube 10, the movement of the annular plates 12 is pushed by a pushing mechanism, and the side wall of the stirring tube 10 is connected to a first movable plate 13 through a lifting mechanism, and the side wall of the first movable plate 13 is fixedly connected to a plurality of mounting plates 14, the mounting plates 14 slide on the side wall of the stirring tube 10, and a sampling cover 15 is fixedly connected to the top of each mounting plate 14, a first movable block 16 is connected in the sampling cover 15 through a reset mechanism, the movement of the first movable block 16 is pushed by a pushing assembly, and the top of the sampling cover 15 is a transparent plate 1501, a liquid inlet pipe 17 and a liquid outlet pipe 18 are fixedly connected to the side wall of the sampling cover 15, and a second one-way valve is provided in the liquid inlet pipe 17, and the conduction direction of the second one-way valve is from the outside to the inside of the sampling cover 15, a third one-way valve is provided in the liquid outlet pipe 18, and the third one-way valve is provided. The conducting direction of the valve is from the inside of the sampling cover 15 to the outside, and the other end of the liquid inlet pipe 17 is rotatably connected to a rotating tube 19, the end of the rotating tube 19 is fixedly connected to an inclined tube 20, and the rotation of the rotating tube 19 is driven by a driving assembly, and a protective cover 28 is fixedly connected to the top of the transparent plate 1501, and a white light lamp 29 and a visual sensor 30 are fixedly connected in the protective cover 28. When the chlorination device is in use, the chlorine gas introduced is more uniform and sufficient, which can improve the efficiency and effect of chlorination; it is convenient to adjust the opening height range of the air outlet 11 according to the height of the liquid level in the chlorination kettle 1, to ensure that the chlorine gas is directly introduced into the liquid, to avoid the chlorine gas directly entering above the liquid level, to ensure the efficiency and effect of the reaction, and to ensure the utilization rate of the chlorine gas; it is convenient to sample and detect the color of the liquid at different depths, which is more convenient, faster, more accurate and reliable, and improves the accuracy of judging the reaction process, thereby ensuring the efficiency and effect of the reaction; The reset mechanism includes two symmetrically arranged first T-shaped guide rods 201 fixedly connected to the side walls of the first moving block 16, and the side walls of the first T-shaped guide rods 201 are sleeved with connecting blocks 202, the lower ends of the connecting blocks 202 are fixed to the top of the mounting plate 14, and the side walls of each first T-shaped guide rod 201 are sleeved with first springs 203, which play a guiding and resetting role for the movement of the first moving block 16; The pushing assembly includes a first pushing rod 301 fixedly inserted in the side wall of the sampling cover 15, and one end of the first pushing rod 301 is fixed to the side wall of the first moving block 16, the side wall of the stirring tube 10 is fixedly connected with a plurality of mounting blocks 302 arranged in an array, and the side wall of the mounting block 302 is fixedly connected with a flat plate 303, the bottom of the flat plate 303 is fixedly connected with a first inclined plate 304, and the top of the flat plate 303 is fixedly connected with a second inclined plate 305, when the end of the first pushing rod 301 slides along the first inclined plate 304 to the side wall of the flat plate 303, it can push the first moving block 16 to move in a direction away from the sampling cover 15; The driving assembly includes a spiral groove 401 provided on the side wall of the rotating tube 19, and an L-shaped block 402 is fixedly connected to the side wall of the first moving block 16, and a push pin 403 is fixedly connected to the side wall of the L-shaped block 402, and the other end of the push pin 403 is inserted into the spiral groove 401. When the first moving block 16 moves during liquid extraction, the push pin 403 can be driven by the L-shaped block 402 to slide in the spiral groove 401, thereby driving the rotating tube 19 and the inclined tube 20 to rotate, so that the sampling is more uniform and the effect is better, thereby ensuring the accuracy of the detection result; The pushing mechanism includes a second movable plate 602, and the second movable plate 602 is connected to the side wall of the stirring tube 10 through a lifting assembly, a fixed block 603 is fixedly connected to the top of the second movable plate 602, and two symmetrically arranged second T-shaped guide rods 604 are inserted into the side wall of the fixed block 603, one end of the second T-shaped guide rod 604 is fixedly connected to a pushing block 605, and the pushing block 605 includes a first inclined surface 606 and a second inclined surface 607, and the side wall of each second T-shaped guide rod 604 is sleeved with a first return spring 612, and the inner side wall of each annular plate 12 is fixedly connected with a stopper 601, and the second movable plate 602 is pulled upward by the lifting assembly, and when the first inclined surface 606 abuts against the side wall of the stopper 601, the annular plate 12 can be pushed to move upward; The limiting mechanism includes a first limiting hole 501 and a second limiting hole 502 opened on the inner side wall of the annular plate 12, and the inner side wall of the stirring tube 10 is fixedly connected with a first baffle 503, and the side wall of the first baffle 503 is inserted with two symmetrically arranged third T-shaped guide rods 504, and the end of the third T-shaped guide rod 504 is fixedly connected with a second moving block 505, and the side wall of the second moving block 505 is fixedly connected with a limiting pin 506, and the inner side wall of the stirring tube 10 is fixedly connected with the second baffle 503. The side wall of each third T-shaped guide rod 504 is sleeved with a second return spring 507. When the second movable plate 602 moves upward, when the first inclined surface 606 abuts against the side wall of the stopper 601, the annular plate 12 can be pushed to move upward. At the same time, the limit pin 506 slides out of the second limit hole 502 and slides on the inner wall of the annular plate 12. The second return spring 507 is compressed. When the annular plate 12 abuts against the bottom of the first baffle plate 503, the limit pin 506 and the stopper 506 are pressed. The first limiting hole 501 is aligned, and under the action of the second return spring 507, the limiting pin 506 can be inserted into the second limiting hole 502 for limiting. At this time, the annular plate 12 can be limited, and the pushing block 605 can be pushed to gradually move in the direction close to the fixed block 603. At the same time, the first return spring 612 is gradually compressed, so that the pushing block 605 can pass over the stopper 601. When the pushing block 605 passes over the stopper 601, the pushing block 605 can move and reset under the action of the first return spring 612. When the first motor 611 is reversed, the second movable plate 602 can move downward and reset under the action of the second spring 702. When the second inclined surface 607 abuts against the stopper 601, the annular plate 12 can be pushed to move downward. When the annular plate 12 is driven to abut against the top of the second baffle 508, the pushing block 605 can pass over the stopper 601. At the same time, the limiting pin 506 is inserted into the second limiting hole 502 for limiting. The lifting assembly includes two symmetrically arranged guide rods 701 fixedly connected in the stirring tube 10, and the side wall of each guide rod 701 is sleeved with a second spring 702, the second movable plate 602 is sleeved on the side wall of the guide rod 701, and each stirring tube 10 is rotatably connected with a winding wheel 609 through a first rotating shaft 608, the side wall of the winding wheel 609 is fixedly connected with a first pull rope 610, and the lower end of the first pull rope 610 is fixed to the top of the second movable plate 602, the side wall of the stirring tube 10 is fixedly connected with a first motor 611, and the output end of the first motor 611 is fixed to one end of the first rotating shaft 608, by starting the first motor 611, the rotation of the first motor 611 drives the rotation of the first rotating shaft 608 and the winding wheel 609, so that the first pull rope 610 can be wound up, and then the second movable plate 602 is pulled to move upward along the guide rod 701; The lifting mechanism includes a second pull rope 703 in an annular shape and inserted into the side wall of each stirring tube 10, and the first movable plate 13 is fixedly sleeved on the side wall of the second pull rope 703, and the top of each connecting plate 9 is fixedly connected to two symmetrically arranged support blocks 704, and the opposite side walls of the two support blocks 704 are rotatably connected to a driving roller 707 through a second rotating shaft 705, the second pull rope 703 is inserted between the two driving rollers 707 and abuts against them, and the side wall of the support block 704 is fixedly connected to a second motor 706, and the output of the second motor 706 The output end is fixed to one end of the second rotating shaft 705, and the second motor 706 is started. The rotation of the second motor 706 drives the second rotating shaft 705 and the driving roller 707 to rotate, so that the first moving plate 13 can be driven to move upward through the second pull rope 703, and at the same time, the mounting plate 14 can drive the sampling cover 15 to move upward synchronously. When the second motor 706 is reversed, the driving roller 707 can be driven to reverse, so that the mounting plate 14 is driven to move downward through the second pull rope 703, and then the mounting plate 14 and the sampling cover 15 move downward; The driving mechanism includes a gear ring 2601 fixedly sleeved on the side wall of the rotating rod 8, and a U-shaped frame 2602 is fixedly connected to the top of the chlorination kettle 1, and a third motor 2603 is fixedly connected to the top of the U-shaped frame 2602, and a gear 2604 is fixedly connected to the output end of the third motor 2603, and the gear 2604 is meshed with the gear ring 2601. The third motor 2603 is started, and the rotation of the third motor 2603 drives the rotation of the gear 2604, thereby driving the rotating rod 8 to rotate, and then driving the stirring tube 10 to rotate through the connecting plate 9. At the same time, the air supply valve 27 is opened. At this time, chlorine can enter the stirring tube 10 after passing through the first connecting pipe 25, the air supply pipe 21, the fixed pipe 22 and the second connecting pipe 23, and enter the material through the air outlet 11, so that the introduced chlorine is more uniform and sufficient, which can improve the efficiency of chlorination and the effect.

[0040] When the chlorination device is in use, the material is put into the chlorination kettle 1 through the feed valve 101, and then the third motor 2603 is started. The rotation of the third motor 2603 drives the rotation of the gear 2604, thereby driving the rotating rod 8 to rotate, and then driving the stirring tube 10 to rotate through the connecting plate 9. At the same time, the air supply valve 27 is opened. At this time, the chlorine gas can enter the stirring tube 10 through the first connecting tube 25, the air supply tube 21, the fixed tube 22 and the second connecting tube 23, and enter the material through the air outlet 11, so that the chlorine gas introduced is more uniform and sufficient, which can improve the efficiency of chlorination and the effect; By starting the first motor 611, the rotation of the first motor 611 drives the rotation of the first rotating shaft 608 and the winding wheel 609, so that the first pull rope 610 can be reeled up, and then the second movable plate 602 is pulled upward along the guide rod 701. At the same time, the second spring 702 is compressed. When the first inclined surface 606 abuts against the side wall of the stop block 601, the annular plate 12 can be pushed to move upward. At the same time, the limiting pin 506 slides out of the second limiting hole 502 and slides on the inner wall of the annular plate 12. The second return spring 507 is compressed. When the annular plate 12 abuts against the bottom of the first baffle 503 , the limiting pin 506 is aligned with the first limiting hole 501, and under the action of the second return spring 507, the limiting pin 506 can be inserted into the second limiting hole 502 for limiting. At this time, the annular plate 12 can be limited, and at the same time, the group of air outlet holes 11 can be opened, and the pushing block 605 can be pushed to gradually move toward the direction close to the fixed block 603. At the same time, the first return spring 612 is gradually compressed, so that the pushing block 605 can pass over the stopper 601. When the pushing block 605 passes over the stopper 601, the pushing block 605 can move and reset under the action of the first return spring 612; When the first motor 611 is reversed, the second movable plate 602 can move downward and reset under the action of the second spring 702. When the second inclined surface 607 abuts against the stopper 601, the annular plate 12 can be pushed downward to drive the annular plate 12 to abut against the top of the second baffle 508. The push block 605 can pass over the stopper 601. At the same time, the limit pin 506 is inserted into the second limit hole 502 for limiting. At this time, the group of air outlet holes 11 can be closed. This reciprocating process can be used to adjust the opening height range of the air outlet holes 11 according to the height of the liquid level in the chlorination kettle 1, so as to ensure that chlorine gas is directly introduced into the liquid and avoid chlorine gas directly entering above the liquid level, thereby ensuring the efficiency and effect of the reaction and ensuring the utilization rate of chlorine gas. During the reaction, when the color of the liquid needs to be detected, the second motor 706 is started, and the rotation of the second motor 706 drives the rotation of the second rotating shaft 705 and the driving roller 707, so that the first moving plate 13 can be driven to move upward through the second pull rope 703, and at the same time, the mounting plate 14 can drive the sampling cover 15 to move upward synchronously, and when the end of the first push rod 301 slides along the first inclined plate 304 to the side wall of the flat plate 303, the first moving block 16 can be pushed to move away from the sampling cover 15, and at the same time, the first spring 203 is compressed, the second one-way valve is opened, and the third one-way valve is closed. At this time, the liquid can be drawn into the sampling cover 15 through the inclined tube 20, the rotating tube 19 and the liquid inlet tube 17, the white light lamp 29 is turned on, and the color of the liquid is detected by the visual sensor 30; When the first push rod 301 slides along the flat plate 303 to the side wall of the second inclined plate 305 and is separated from the second inclined plate 305, the first moving block 16 can be moved and reset under the action of the first spring 203, thereby squeezing the liquid in the sampling cover 15. At the same time, the second one-way valve is closed and the third one-way valve is opened, and the liquid in the sampling cover 15 is squeezed back into the chlorination kettle 1 through the liquid outlet pipe 18, so as to facilitate the sampling and detection of the liquid color at different depths, which is more convenient, faster, more accurate and reliable, and improves the accuracy of judging the reaction process, thereby ensuring the efficiency and effect of the reaction; At the same time, when extracting liquid, when the first moving block 16 moves, it can drive the pushing pin 403 to slide in the spiral groove 401 through the L-shaped block 402, thereby pushing the rotating tube 19 and the inclined tube 20 to rotate, so that the sampling is more uniform and the effect is better, thereby ensuring the accuracy of the test results, and when the second motor 706 is reversed, it can drive the driving roller 707 to reverse, thereby driving the mounting plate 14 to move downward through the second pull rope 703, and then moving downward through the mounting plate 14 and the sampling cover 15. At this time, sampling operations can also be performed to ensure that sampling and detection can be achieved during the upward and downward movement of the sampling cover 15, so that the detection efficiency is higher.

Claims

1. A production process for an anti-drip flame retardant, characterized in that: The following steps are involved: S1: Substitution: After checking that the production equipment is in normal condition, first add a slightly excessive amount of PCl3 into the substitution reactor according to the ratio, stir, and after checking that the process gas recovery system is normal again, add pentaerythritol in batches according to the ratio, stir thoroughly, heat up, and start the reaction. After the pentaerythritol is basically reacted, the first intermediate RX-tetrafluoro V100 is obtained by reaction. Then, open the vacuum, evaporate the remaining PCl3 for recovery, and after the recovery of PCl3 is completed, cool the materials in the substitution reactor; S2: Chlorination: The substituted material is transported to the chlorination device for chlorination treatment to obtain the second intermediate RX-tetrafluoroethylene V100. After confirming that the reaction is complete, the material in the chlorination device is transported to the addition reactor; S3: Addition: Add titanium tetrachloride as a catalyst to the addition reactor under vacuum, and slowly add propylene oxide dropwise under the liquid after returning to normal pressure. When the addition of propylene oxide is nearly complete, the temperature in the addition reactor begins to slowly drop, and the cooling is turned off. After stirring and continuing the reaction for several minutes, the temperature is raised, and 1,2-dichloroethane is recovered under normal pressure, and the temperature is kept to ensure that the 1,2-dichloroethane is completely recovered. The industrial grade RX-V100 is obtained by reaction, and the materials in the reactor are transported to the alkali washing reactor; S4: Washing: Start the alkali washing kettle and stir, add soda ash and water according to the ratio, slowly heat up to 70℃, stop stirring, let stand for 1h, separate the layers, and transport the water layer to the sewage device in the factory for treatment. After washing, the nearly neutral material layer is transported to the water washing kettle, start the water washing kettle and stir, add water according to the ratio, slowly heat up to 70℃, stop stirring, let stand for 1h, separate the layers, and transport the water layer to the sewage device in the factory for treatment; S5: Fluorosynthesis: The material layer obtained by secondary water washing and stratification is transported to the fluorosynthesis kettle, stirred at high speed, and tetrafluoroethylene suspension is slowly added according to the proportion. After the addition is completed, stirring is continued for 0.5 to 1 hour to allow the material molecules to fully chain-link to form a uniform and stable industrial-grade RX-V100 crude liquid, and then the liquid is transported to the three-stage distillation system; S6: Three-stage distillation: about 5% TCPP with a lower boiling point brought into the industrial-grade RX-V100 crude liquid is distilled out from the top of the tower, so that the TCPP content in the product in the bottom of the tower is reduced to ≤50ppm. The three-stage distillation uses a small amount of medium-pressure steam to directly contact and strip the material to further remove light and purify it. The TCPP content in the final product is ≤50ppm, and a high-purity RX-tetrafluoroethylene V100 anti-drip flame retardant product is obtained.

2. The production process of an anti-drip flame retardant according to claim 1, characterized in that: In step S1, during the reaction, the heating rate is controlled to gradually increase the temperature in the kettle to 80-90°C. The duration of the entire heating reaction process is controlled to be about 8 hours. After the PCl3 is recovered, the material in the kettle is cooled to below 70°C.

3. The production process of an anti-drip flame retardant according to claim 1, characterized in that: In step S1, HCl produced during the reaction is absorbed by water to produce by-product hydrochloric acid.

4. The production process of an anti-drip flame retardant according to claim 1, characterized in that: In step S2, before conveying the material in S1 to the chlorination device, add a proper amount of 1,2-dichloroethane to the material and stir it evenly.

5. The production process of an anti-drip flame retardant according to claim 1, characterized in that: In step S3, when propylene oxide is added dropwise, the cooling water is adjusted to control the reaction temperature in the kettle at 40°C.

6. The production process of an anti-drip flame retardant according to claim 1, characterized in that: In step S3, the heating temperature is 90°C and the insulation time is 1 hour.

7. The production process of an anti-dripping flame retardant according to claim 1, characterized in that: In step S4, when the water separation effect is poor, the unqualified intermediate product can be distilled and dehydrated to control the moisture content of the material to meet the process requirements.

8. The production process of an anti-drip flame retardant according to claim 1, characterized in that: In step S6, the no-load vacuum of the first and second distillation stages is required to be ≤5 Pa, and the distillation temperature is controlled at 100-110°C for the first stage and 110-120°C for the second stage.

9. The production process of an anti-drip flame retardant according to claim 1, characterized in that: In step S6, after the distillation is completed, the following steps are also included: The tower bottom is cooled, inspected, filled and stored, and the light components at the top of the tower are recovered according to the fraction temperature section, and a small amount of TCPP and RX-V100 with a content of ≥95% are produced as by-products.

10. The production process of an anti-drip flame retardant according to claim 1, characterized in that: The chlorination device comprises a chlorination kettle (1), and the chlorination kettle (1) comprises a feed valve (101) and a discharge valve (102). The top of the chlorination kettle (1) is connected to a rotating rod (8) via a driving mechanism, and the side wall of the rotating rod (8) is fixedly connected to a plurality of connecting plates (9) arranged in an array, the bottom of the connecting plate (9) is fixedly connected to a plurality of hollow stirring tubes (10), and the side wall of the stirring tube (10) is provided with a plurality of groups of gas outlet holes (11) arranged in an array, each group of the gas outlet holes (11) has a plurality of gas outlet holes (11), and each gas outlet hole (11) is provided with a first one-way valve, and a gas supply pipe (10) is fixedly inserted into the rotating rod (8). 21), and an L-shaped plate (24) is fixedly connected to the top of the chlorination kettle (1), a first connecting pipe (25) is fixedly inserted on the top of the L-shaped plate (24), and the lower end of the first connecting pipe (25) is rotatably connected to the upper end of the air supply pipe (21), the upper end of the first connecting pipe (25) is fixedly connected to the air supply valve (27), and a plurality of fixed pipes (22) arranged in an array are fixedly inserted on the side wall of the rotating rod (8), one end of the fixed pipe (22) passes through the rotating rod (8) and is fixed to the side wall of the air supply pipe (21), and a second connecting pipe (23) is fixedly connected between the top of each stirring tube (10) and the fixed pipe (22); A plurality of annular plates (12) arranged in an array are slidably connected in each of the stirring tubes (10), and a limiting mechanism for limiting the position of the annular plates (12) is provided in the stirring tube (10). The movement of the annular plates (12) is driven by a driving mechanism, and a first movable plate (13) is connected to the side wall of the stirring tube (10) via a lifting mechanism. A plurality of mounting plates (14) are fixedly connected to the side wall of the first movable plate (13). The mounting plates (14) slide on the side wall of the stirring tube (10), and a sampling cover (15) is fixedly connected to the top of each mounting plate (14). A first movable block (16) is connected to the inside of the sampling cover (15) via a reset mechanism. The first movable block (16) The movement of the sampling cover (15) is driven by a driving assembly, and the top of the sampling cover (15) is a transparent plate (1501), the side wall of the sampling cover (15) is fixedly connected to a liquid inlet pipe (17) and a liquid outlet pipe (18), and a second one-way valve is provided in the liquid inlet pipe (17), and a third one-way valve is provided in the liquid outlet pipe (18), and the other end of the liquid inlet pipe (17) is rotatably connected to a rotating tube (19), and the end of the rotating tube (19) is fixedly connected to an inclined tube (20), and the rotation of the rotating tube (19) is driven by a driving assembly, and the top of the transparent plate (1501) is fixedly connected to a protective cover (28), and a white light lamp (29) and a visual sensor (30) are fixedly connected in the protective cover (28); The reset mechanism comprises two symmetrically arranged first T-shaped guide rods (201) fixedly connected to the side wall of the first moving block (16), and the side wall of the first T-shaped guide rod (201) is sleeved with a connecting block (202), the lower end of the connecting block (202) is fixed to the top of the mounting plate (14), and the side wall of each first T-shaped guide rod (201) is sleeved with a first spring (203); The pushing assembly comprises a first pushing rod (301) fixedly inserted in the side wall of the sampling cover (15), and one end of the first pushing rod (301) is fixed to the side wall of the first moving block (16); the side wall of the stirring tube (10) is fixedly connected to a plurality of mounting blocks (302) arranged in an array, and the side wall of the mounting block (302) is fixedly connected to a flat plate (303); the bottom of the flat plate (303) is fixedly connected to a first inclined plate (304), and the top of the flat plate (303) is fixedly connected to a second inclined plate (305); The driving assembly comprises a spiral groove (401) formed on a side wall of the rotating tube (19), and the side wall of the first moving block (16) is fixedly connected to an L-shaped block (402), the side wall of the L-shaped block (402) is fixedly connected to a pushing pin (403), and the other end of the pushing pin (403) is inserted into the spiral groove (401); The pushing mechanism comprises a second movable plate (602), and the second movable plate (602) is connected to the side wall of the stirring tube (10) through a lifting assembly, a fixed block (603) is fixedly connected to the top of the second movable plate (602), and two symmetrically arranged second T-shaped guide rods (604) are inserted into the side wall of the fixed block (603), one end of the second T-shaped guide rod (604) is fixedly connected to a pushing block (605), and the pushing block (605) comprises a first inclined surface (606) and a second inclined surface (607), the side wall of each second T-shaped guide rod (604) is sleeved with a first return spring (612), and the inner side wall of each annular plate (12) is fixedly connected to a stopper (601); The limiting mechanism comprises a first limiting hole (501) and a second limiting hole (502) formed on the inner side wall of the annular plate (12); the inner side wall of the stirring tube (10) is fixedly connected to a first baffle (503); the side wall of the first baffle (503) is inserted with two symmetrically arranged third T-shaped guide rods (504); the end of the third T-shaped guide rod (504) is fixedly connected to a second moving block (505); the side wall of the second moving block (505) is fixedly connected to a limiting pin (506); the inner side wall of the stirring tube (10) is fixedly connected to a second baffle (508); and the side wall of each of the third T-shaped guide rods (504) is sleeved with a second return spring (507); The lifting assembly comprises two symmetrically arranged guide rods (701) fixedly connected in the stirring tube (10), and the side wall of each guide rod (701) is sleeved with a second spring (702), the second movable plate (602) is sleeved on the side wall of the guide rod (701), and each stirring tube (10) is rotatably connected to a winding wheel (609) via a first rotating shaft (608), the side wall of the winding wheel (609) is fixedly connected to a first pull rope (610), and the lower end of the first pull rope (610) is fixed to the top of the second movable plate (602), the side wall of the stirring tube (10) is fixedly connected to a first motor (611), and the output end of the first motor (611) is fixed to one end of the first rotating shaft (608); The lifting mechanism comprises a second pull rope (703) arranged in an annular shape and inserted into the side wall of each stirring tube (10), and the first movable plate (13) is fixedly sleeved on the side wall of the second pull rope (703), the top of each connecting plate (9) is fixedly connected to two symmetrically arranged support blocks (704), and the opposite side walls of the two support blocks (704) are rotatably connected to a driving roller (707) via a second rotating shaft (705), the second pull rope (703) is inserted between the two driving rollers (707) and abuts against them, the side wall of the support block (704) is fixedly connected to a second motor (706), and the output end of the second motor (706) is fixed to one end of the second rotating shaft (705); The driving mechanism comprises a gear ring (2601) fixedly sleeved on the side wall of the rotating rod (8), and a U-shaped frame (2602) is fixedly connected to the top of the chlorination kettle (1), a third motor (2603) is fixedly connected to the top of the U-shaped frame (2602), and a gear (2604) is fixedly connected to the output end of the third motor (2603), and the gear (2604) is meshed with the gear ring (2601).

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