A deacidification device used in the production process of dimethyl phosphite

Abstract

The present invention relates to the technical field of deacidification, and discloses a deacidification device used in a dimethyl phosphite production process, comprising a kettle body and a perfusion pipe, wherein the perfusion pipe is coaxially mounted on the upper portion of the kettle body. The present invention drives a driving member to move during rotation of a trigger member, and the driving member converts the translation into a driving force required for the rotation of a perfusion head, thereby driving the perfusion head to rotate so as to connect the inner cavities of the perfusion pipe and the injection pipe, so that the dimethyl phosphite entering the perfusion pipe passes through the perfusion head and enters the injection pipe, and then enters an atomizing device through the injection pipe, and the dimethyl phosphite is atomized by the high-speed rotation of the atomizing device. As the trigger member rotates at high speed, the driving member is cyclically squeezed, thereby achieving intermittent driving of the perfusion head to connect the inner cavities of the perfusion pipe and the injection pipe to achieve intermittent material discharge, thereby avoiding the dimethyl phosphite from being introduced too quickly, resulting in the dimethyl phosphite not being atomized in time in the atomizing device and overflowing.

Description

Technical Field

[0001] The invention relates to the technical field of deacidification, in particular to a deacidification device used in the production process of dimethyl phosphite. Background Art

[0002] Dimethyl phosphite plays a crucial role in the fine chemical industry. It serves as an intermediate in the production of pesticides such as glyphosate, trichlorfon, chlorpyrifos, and omethoate, and also as a raw material for organic corrosion inhibitors, fuel additives, plastic additives, and flame retardants. Dimethyl phosphite is typically produced by reacting phosphorus trichloride with methanol. Industrial production has traditionally relied on a batch process involving a single-pot reaction and single-still distillation, which is labor-intensive and labor-intensive, with long production cycles and low equipment capacity.

[0003] During the preparation of dimethyl phosphite, hydrogen chloride is produced, and hydrogen chloride easily reacts with dimethyl phosphite:

[0004] For example: (CH3O)2POH+HCl→CH3OP(OH)2+CH3Cl

[0005] CH3OP(OH)2+HCl→H3PO3+CH3Cl

[0006] In the above reaction process, the higher the temperature and the longer the reaction time, the more side reactions are produced. Therefore, dimethyl phosphite produced by the reaction of phosphorus trichloride and methanol is often passed into the spin tray of the deacidification kettle, and the spin tray is used to atomize the dimethyl phosphite for distillation and evaporate the hydrogen chloride gas. However, when the dimethyl phosphite is passed into the spin tray, the speed of the dimethyl phosphite introduction cannot be controlled. Therefore, it is easy to cause the dimethyl phosphite to overflow from the spin tray if the dimethyl phosphite is passed too quickly, resulting in incomplete atomization. If the dimethyl phosphite is passed too slowly, the dimethyl phosphite and hydrogen chloride gas will stay in the introduction pipe for a long time, resulting in increased side reactions and affecting the purity of the dimethyl phosphite.

[0007] Currently, no effective solutions have been proposed for the problems in related technologies. Summary of the Invention

[0008] (1) Technical problems solved

[0009] In response to the deficiencies of the prior art, the present invention provides a deacidification device for use in the production process of dimethyl phosphite. The device has the advantages of intermittent atomization distillation and heat exchange in an inlet pipe to reduce the temperature and inhibit the occurrence of side reactions. The device solves the problem that too fast inlet causes dimethyl phosphite to overflow from the spinner, resulting in incomplete atomization, and too slow inlet causes dimethyl phosphite and hydrogen chloride gas to stay in the inlet pipe for a long time, resulting in increased side reactions and affecting the purity of the dimethyl phosphite.

[0010] (2) Technical solution

[0011] In order to solve the technical problems that too fast introduction causes dimethyl phosphite to overflow from the spinner, resulting in incomplete atomization, and too slow introduction causes dimethyl phosphite and hydrogen chloride gas to stay in the introduction pipe for a long time, resulting in increased side reactions and affecting the purity of dimethyl phosphite, the present invention provides the following technical solutions:

[0012] A deacidification device used in the production process of dimethyl phosphite comprises a kettle body and a perfusion pipe. The perfusion pipe is coaxially mounted on the upper portion of the kettle body, with its discharge end located inside the kettle body. A perfusion head is provided at the discharge end of the perfusion pipe, which is sealedly connected to an injection pipe. An atomizing device is provided at the lower portion of the inner cavity of the kettle body, and the injection pipe is used to transport liquid to the atomizing device. A trigger is mounted on the atomizing device, and the atomizing device and the trigger rotate synchronously about the central axis of the kettle body. The perfusion head is dynamically connected to a driving member.

[0013] The trigger rotates with the atomizing device to change its movement radius, so that it is squeezed by the driving member during rotation. The driving member is pressed to drive the perfusion head to rotate forward. The perfusion head rotates forward to connect the perfusion pipe with the injection pipe. The trigger is disengaged from the driving member to reset the driving member. The driving member is reset to drive the perfusion head to rotate in the opposite direction. The perfusion head rotates in the opposite direction to block the perfusion pipe from the injection pipe.

[0014] Preferably, an evaporation component is provided on the inner wall of the kettle body, and the atomization device rotates to atomize the liquid introduced into the injection pipe and blow it toward the evaporation component. The evaporation component is used to provide the temperature required for distillation after the liquid is atomized, and a cooling component is provided on the outer surface of the perfusion pipe to reduce the temperature inside the perfusion pipe.

[0015] Preferably, a top loading plate is fixedly mounted on the upper portion of the inner wall of the kettle body, the top loading plate is fixedly connected to the perfusion pipe, and the perfusion pipe is fixedly connected to the injection pipe via a bridging frame, so that the perfusion head can be rotatably mounted relative to the injection pipe and the perfusion pipe.

[0016] Preferably, the pouring head includes a connecting seat, which is fixedly mounted on the inner wall of the discharge end of the pouring pipe, and is provided with a plurality of connecting holes. A limiting column is provided on the upper surface of the connecting seat, and a limiting ring is fitted on the upper surface of the connecting seat. A rotation limiting groove is provided on the lower surface of the limiting ring, and the rotation limiting groove is tangent to the limiting column.

[0017] The limiting ring is coaxially fixed with a support shaft, one end of the support shaft is fixed with a blocking seat, a blocking component is provided on the blocking seat for blocking the communicating hole, and a drainage groove is provided between adjacent blocking components for communicating with the communicating hole.

[0018] Preferably, the sealing assembly includes a plurality of mounting grooves, which are evenly distributed on the circumference of the sealing seat. A ejection spring is fixedly installed on the bottom of the inner wall of each mounting groove, and a sealing head is fixedly installed on one end of the ejection spring. The sealing head slides with the mounting groove and is adapted to the connecting hole, and the surface of the sealing head entering the connecting hole is an arc surface.

[0019] Preferably, the driving member includes a suspension column, which is embedded and fixed on the top loading plate, and a driving tooth is rotatably mounted on the lower surface of the suspension column, the driving tooth penetrates and is threadedly engaged with a driving screw, a force rod is fixedly mounted on the lower surface of the driving screw, and one end of the force rod that is pressed against the trigger member is a wedge block, and a cross limiting column is fixedly mounted on the upper surface of the driving screw, and the cross limiting column penetrates and is slidably connected to the upper surface of the suspension column;

[0020] The driving teeth are engaged with driven teeth, and the driven teeth are fixedly sleeved on the outer surface of the blocking seat to drive the blocking seat to rotate;

[0021] The cross limiting column is coaxially provided with a return spring, and the two ends of the return spring are respectively fixedly mounted on the top of the inner wall of the suspension column and the upper surface of the driving screw.

[0022] Preferably, the atomizing device comprises a spinning disc, the upper surface of which is fixedly mounted on the inner wall of the kettle body, an atomizing fence is fixedly mounted on the upper surface of the spinning disc, and the injection pipe passes through and is fixedly connected to the atomizing fence;

[0023] An impeller is rotatably mounted on the bottom of the inner wall of the spinning disc, an output shaft of a motor is fixedly mounted on the bottom end of the impeller, the output shaft of the motor penetrates and rotatably connects the spinning disc and the kettle body, and the motor is fixedly mounted on the bottom of the kettle body.

[0024] Preferably, the trigger member includes a trigger seat, which is fixedly mounted on the output shaft of the motor, and the trigger seat is provided with a T-shaped slot, the T-shaped slot is slidably connected to a T-shaped trigger block, the T-shaped trigger block passes through and is slidably connected to a guide rod, the guide rod is fixedly mounted on the T-shaped slot, and the guide rod is coaxially provided with a centrifugal spring, and both ends of the centrifugal spring are respectively fixedly mounted on the T-shaped trigger block and the T-shaped slot.

[0025] Preferably, the evaporation assembly includes evaporation fins and evaporation walls, the evaporation walls and the kettle body form a heat chamber, the evaporation fins fit the heat chamber, and the upper and lower parts of the heat chamber are respectively provided with evaporation liquid inlet holes and evaporation liquid outlet holes;

[0026] The cooling assembly includes cooling fins and an outer tube. The outer tube and the perfusion tube form a cooling cavity. The cooling fins fit the cooling cavity. The upper and lower parts of the cooling cavity are respectively provided with a cooling liquid inlet hole and a cooling liquid outlet hole.

[0027] Preferably, the top loading plate is penetrated and installed with an exhaust pipe, and the exhaust pipe is externally connected to a negative pressure pump; the bottom of the kettle body is penetrated and installed with a discharge pipe.

[0028] (3) Beneficial effects

[0029] Compared with the prior art, the present invention provides a deacidification device used in the production process of dimethyl phosphite, which has the following beneficial effects:

[0030] 1. According to the present invention, when the rotation speed of the atomizing device reaches a set threshold, the atomizing device can centrifugally atomize dimethyl phosphite. The centrifugal force achieved by the rotation speed of the trigger member at this time keeps the motion radius of the trigger member equal to the distance from the rotation axis of the driving member knife trigger member, so that the trigger member drives the driving member to move during the rotation process, and the driving member converts the translation into the driving force required for the rotation of the perfusion head, thereby driving the perfusion head to rotate to connect the inner cavities of the perfusion tube and the injection tube, so that the dimethyl phosphite entering the perfusion tube passes through the perfusion head into the injection tube, and then enters the atomizing device through the injection tube, and the dimethyl phosphite is atomized by the high-speed rotation of the atomizing device. As the trigger member rotates at high speed, the driving member is cyclically squeezed, thereby achieving intermittent driving of the perfusion head to connect the inner cavities of the perfusion tube and the injection tube to achieve intermittent feeding, thereby avoiding the dimethyl phosphite from being introduced too quickly, resulting in the dimethyl phosphite not being atomized in time in the atomizing device and overflowing.

[0031] 2. The present invention achieves a synchronous movement of the trigger member and the atomizing device. When the rotation speed of the atomizing device reaches a level capable of atomizing dimethyl phosphite, the trigger member can move to a circular motion trajectory where it is squeezed by the driving member, and cyclically squeezes the driving member to achieve the purpose of intermittently perfusing dimethyl phosphite into the atomizing device, thereby effectively preventing the dimethyl phosphite from being excessively filled and overflowing before the rotation speed of the atomizing device reaches a set speed threshold, resulting in the dimethyl phosphite being directly discharged into the dimethyl phosphite without being atomized and distilled after atomization, resulting in the dimethyl phosphite still containing acidic gas, thereby affecting the purity of the dimethyl phosphite.

[0032] 3. In the present invention, since a large amount of heat is generated when phosphorus trichloride and methanol react, and the heat will promote the occurrence of side reactions, after the reaction of phosphorus trichloride and methanol, dimethyl phosphite containing hydrogen chloride gas is obtained. Before the dimethyl phosphite is passed into the perfusion pipe to enter the atomizing device for atomization, the heat in the perfusion pipe is taken away by the cooling assembly, thereby reducing the temperature of the dimethyl phosphite containing hydrogen chloride gas to the extent of suppressing the occurrence of side reactions, thereby effectively alleviating the disadvantages caused by the prolonged time brought about by intermittent feeding, and balancing the interference of time and temperature on the side reaction of dimethyl phosphite and hydrogen chloride gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional structural diagram of the kettle body of the present invention;

[0034] Figure 2 A half-sectional view of the assembly structure of the present invention;

[0035] Figure 3 It is the internal structure diagram of the present invention;

[0036] Figure 4 This is a structural diagram of the atomization device of the present invention;

[0037] Figure 5 A partial exploded view of the assembly structure of the atomizing device and the trigger member of the present invention;

[0038] Figure 6 This is a three-dimensional structural diagram of the driving member of the present invention;

[0039] Figure 7 An exploded view of the driving member of the present invention;

[0040] Figure 8 It is a three-dimensional structural diagram of the injection head of the present invention;

[0041] Figure 9 This is one of the exploded views of the injection head of the present invention;

[0042] Figure 10 This is the second exploded view of the injection head of the present invention.

[0043] In the figure: 1. kettle body; 2. filling pipe; 3. filling head; 301. connecting seat; 302. limiting ring; 303. limiting column; 304. rotation limiting groove; 305. support shaft; 306. discharge groove; 307. blocking seat; 308. blocking assembly; 3081. mounting groove; 3082. ejection spring; 3083. blocking head; 309. connecting hole; 4. injection pipe; 5. atomizing device; 501. throwing disc; 502. atomizing fence; 503. impeller; 504. motor; 6. trigger; 601. trigger seat; 602. T-shaped slide; 603. T-shaped trigger block ;604, guide rod; 605, centrifugal spring; 7, driving part; 701, suspension column; 702, driving tooth; 703, driving screw; 704, cross limit column; 705, force rod; 706, driven tooth; 707, reset spring; 8, evaporation assembly; 801, evaporation fin; 802, evaporation wall; 803, evaporation liquid inlet; 804, evaporation liquid outlet; 9, cooling assembly; 901, cooling fin; 902, outer tube; 903, cooling liquid inlet; 904, cooling liquid outlet; 10, top load plate; 11, bridge frame; 12, exhaust pipe; 13, discharge pipe. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0045] As described in the background art, the prior art has deficiencies. In order to solve the above technical problems, the present application proposes a deacidification device for use in the production process of dimethyl phosphite.

[0046] See also Figure 1-10 A deacidification device used in the production process of dimethyl phosphite includes a kettle body 1 and a perfusion pipe 2, the perfusion pipe 2 is coaxially installed on the upper part of the kettle body 1, and its discharge end is located inside the kettle body 1, the discharge end of the perfusion pipe 2 is provided with a perfusion head 3, the perfusion head 3 is sealed with an injection pipe 4, an atomizing device 5 is provided at the lower part of the inner cavity of the kettle body 1, the injection pipe 4 is used to transport liquid to the atomizing device 5, the atomizing device 5 is installed with a trigger 6, and the atomizing device 5 and the trigger 6 rotate synchronously around the central axis of the kettle body 1, and the perfusion head 3 is dynamically connected to a driving member 7;

[0047] The trigger member 6 rotates with the atomizing device 5 to change its movement radius, so that it is squeezed by the driving member 7 during the rotation process. The driving member 7 is pressed to drive the perfusion head 3 to rotate forward. The perfusion head 3 rotates forward to connect the perfusion tube 2 with the injection tube 4. The trigger member 6 disengages from the driving member 7 to reset the driving member 7. The driving member 7 resets to drive the perfusion head 3 to rotate in the opposite direction. The perfusion head 3 rotates in the opposite direction to block the perfusion tube 2 and the injection tube 4.

[0048] In specific applications, in order to ensure that dimethyl phosphite is fully atomized and distilled, the atomizing device 5 is first started. When the atomizing device 5 is just started, since its rotation speed has not reached the set threshold value, the centrifugal force generated by the atomizing device 5 before reaching the set speed threshold value is insufficient to atomize the dimethyl phosphite. Therefore, when the atomizing device 5 is gradually accelerated to the set speed threshold value, since the atomizing device 5 and the trigger member 6 move synchronously, the rotation speed of the trigger member 6 also gradually increases. When the rotation speed of the atomizing device 5 reaches the set threshold value, the centrifugal force generated by the rotation speed of the trigger member 6 at this time will change the active radius of the workpiece on the trigger member 6 that is squeezed by the driving member 7, making it away from the central axis of the kettle body 1, until its distance from the central axis of the kettle body 1 is equal to the distance from the position where the driving member 7 and the trigger member 6 are connected to the central axis of the kettle body 1. At this time, as the trigger member 6 moves in a circle around the central axis of the kettle body 1 along with the atomizing device 5, the trigger member 6 squeezes the driving member 7 once every time it rotates one circle;

[0049] Among them, when the trigger member 6 squeezes the driving member 7, the driving member 7 converts the axial displacement generated by the squeezing into a driving force for the pouring head 3 to rotate around the central axis of the kettle body 1, thereby driving the pouring head 3 to rotate. Since the pouring pipe 2 and the injection pipe 4 are relatively fixedly installed, and the pouring head 3 is located at the discharge end of the pouring pipe 2, and is sealed with the pouring pipe 2 and the injection pipe 4, the pouring head 3 rotates relative to the pouring pipe 2, so that the pouring head 3 connects the inner cavities of the pouring pipe 2 and the injection pipe 4, so that the dimethyl phosphite entering the pouring pipe 2 passes through the pouring head 3 and enters the injection pipe 4, and then enters the atomizing device 5 through the injection pipe 4, and the dimethyl phosphite is atomized by the high-speed rotation of the atomizing device 5;

[0050] When the trigger member 6 squeezes the driving member 7, it gradually separates from the driving member 7. The driving member 7 is no longer squeezed by the trigger member 6 and quickly resets, thereby driving the perfusion head 3 to rotate in the opposite direction to reset, thereby blocking the inner cavities of the perfusion tube 2 and the injection tube 4, thereby preventing the flow of dimethyl phosphite.

[0051] The present invention synchronizes the movement of the atomizing device 5 and the triggering member 6, so that after the atomizing device 5 is started, its speed is gradually increased to a set speed threshold, so that the centrifugal force of the triggering member 6 is gradually increased, thereby changing the active radius of the triggering member 6. When the rotation speed of the atomizing device 5 reaches the set threshold, the atomizing device 5 can centrifugally atomize dimethyl phosphite. The centrifugal force achieved by the rotation speed of the triggering member 6 at this time keeps the movement radius of the triggering member 6 at an equal distance from the rotation axis of the driving member 7 and the triggering member 6, so that the triggering member 6 drives the driving member 7 to move during the rotation process, and the driving member 7 converts the translation into the rotation of the perfusion head 3. The driving force required for rotation is used to drive the perfusion head 3 to rotate so as to connect the inner cavities of the perfusion tube 2 and the injection tube 4, so that the dimethyl phosphite entering the perfusion tube 2 passes through the perfusion head 3 and enters the injection tube 4, and then enters the atomizing device 5 through the injection tube 4. The dimethyl phosphite is atomized by the high-speed rotation of the atomizing device 5. As the trigger member 6 rotates at high speed, the driving member 7 is squeezed cyclically, thereby achieving intermittent driving of the perfusion head 3 to connect the inner cavities of the perfusion tube 2 and the injection tube 4 to achieve intermittent material discharge, thereby avoiding the dimethyl phosphite from being introduced too quickly, resulting in the dimethyl phosphite not being able to be atomized in time in the atomizing device 5 and overflowing;

[0052] In addition, the trigger member 6 moves synchronously with the atomizing device 5. When the rotation speed of the atomizing device 5 reaches a level that can atomize dimethyl phosphite, the trigger member 6 can move to the circular motion trajectory where it is squeezed by the driving member 7, and cyclically squeeze the driving member 7 to achieve the purpose of intermittently perfusing dimethyl phosphite into the atomizing device 5, thereby effectively preventing the dimethyl phosphite from being excessively filled and overflowing before the rotation speed of the atomizing device 5 reaches the set speed threshold, causing the dimethyl phosphite to be discharged directly into the dimethyl phosphite without being atomized and distilled after atomization, resulting in the dimethyl phosphite still containing acidic gas, thereby affecting the purity of the dimethyl phosphite.

[0053] Furthermore, for the above-mentioned kettle body 1, an evaporation component 8 is provided on the inner wall of the kettle body 1, and the atomization device 5 rotates to atomize the liquid introduced into the injection pipe 4 and blow it toward the evaporation component 8. The evaporation component 8 is used to provide the temperature required for distillation of the liquid after atomization, and a cooling component 9 is provided on the outer surface of the perfusion pipe 2. The cooling component 9 is used to reduce the temperature inside the perfusion pipe 2;

[0054] It should be noted that dimethyl phosphite produced by the reaction of phosphorus trichloride and methanol contains hydrogen chloride gas, and hydrogen chloride and dimethyl phosphite are prone to produce side reactions. Therefore, the dimethyl phosphite containing hydrogen chloride gas is atomized and then brought into contact with the evaporation component 8, so that the hydrogen chloride gas is heated and evaporated, separating from the dimethyl phosphite, and the dimethyl phosphite flows downward along the evaporation component, thereby achieving the separation of hydrogen chloride gas and dimethyl phosphite, that is, achieving the deacidification of the dimethyl phosphite.

[0055] Since phosphorus trichloride and methanol generate a large amount of heat when reacting, and the heat will promote the occurrence of side reactions, after the reaction of phosphorus trichloride and methanol, dimethyl phosphite containing hydrogen chloride gas is obtained. Before it is passed into the perfusion pipe 2 and enters the atomizing device 5 for atomization, the heat in the perfusion pipe 2 is taken away by the cooling assembly 9, thereby reducing the temperature of the dimethyl phosphite containing hydrogen chloride gas to the extent that the occurrence of side reactions is suppressed, thereby effectively alleviating the disadvantages caused by the prolonged time brought about by intermittent feeding, and balancing the interference of time and temperature on the side reaction between dimethyl phosphite and hydrogen chloride gas.

[0056] Furthermore, for the above-mentioned kettle body 1, a top loading plate 10 is fixedly installed on the upper part of the inner wall of the kettle body 1, and the top loading plate 10 is fixedly connected to the perfusion pipe 2, and the perfusion pipe 2 is fixedly connected to the injection pipe 4 through a bridge frame 11, so that the perfusion head 3 is rotatably installed relative to the injection pipe 4 and the perfusion pipe 2;

[0057] The injection pipe 4 and the perfusion pipe 2 are fixedly installed by using the bridge frame 11, so that the perfusion head 3 can rotate relative to the injection pipe 4 and the perfusion pipe 2, and the top loading plate 10 is used to cooperate with the kettle body 1 to fix the perfusion pipe 2;

[0058] In addition, the perfusion pipe 2 is externally connected to the discharge port of the reactor to pass dimethyl phosphite produced by the reaction of phosphorus trichloride and methanol into the reactor body 1.

[0059] Furthermore, for the above-mentioned pouring head 3, the pouring head 3 includes a connecting seat 301, which is fixedly installed on the inner wall of the discharge end of the pouring pipe 2. The connecting seat 301 is provided with a plurality of connecting holes 309. The upper surface of the connecting seat 301 is provided with a limiting column 303. The upper surface of the connecting seat 301 is in contact with a limiting ring 302. The lower surface of the limiting ring 302 is provided with a rotation limiting groove 304, and the rotation limiting groove 304 is tangent to the limiting column 303.

[0060] The limiting ring 302 is coaxially fixedly mounted with a support shaft 305, one end of which is fixedly mounted with a blocking seat 307. The blocking seat 307 is provided with a blocking component 308 for blocking the communication hole 309, and a drain groove 306 is provided between adjacent blocking components 308 for communicating with the communication hole 309.

[0061] The connecting seat 301 is fixedly mounted on the inner wall of the discharge end of the perfusion tube 2, and realizes the communication between the inner cavity of the perfusion tube 2 and the inner cavity of the injection tube 4 through the connecting hole 309 thereon. The rotation of the blocking seat 307 drives the blocking assembly 308 to rotate synchronously, so that the blocking assembly 308 enters the connecting hole 309 and blocks the connecting hole 309, thereby interrupting the communication between the inner cavity of the perfusion tube 2 and the inner cavity of the injection tube 4.

[0062] The two ends of the support shaft 305 are respectively fixed to the limiting ring 302 and the blocking seat 307, and an I-shaped structure is formed by the support shaft 305, the limiting ring 302 and the blocking seat 307. When the connecting seat 301 is fixed, the limiting ring 302 and the support shaft 305 suspend the blocking seat 307 so that the upper surface of the blocking seat 307 fits tightly with the lower surface of the connecting seat 301, so that the blocking assembly 308 can better block the connecting hole 309. When the support shaft 305, the limiting ring 302 and the blocking seat 307 form an I-shaped structure and rotate relative to the connecting seat 301, the rotation stability is achieved by rotating the limiting groove 304 and the limiting column 303.

[0063] The present invention rotates the blocking seat 307 to drive the blocking component 308 to be misaligned with the connecting hole 309, and makes the connecting hole 309 correspond to the discharge groove 306, so that the perfusion tube 2 is connected to the inner cavity of the injection tube 4 through the connecting hole 309 and the discharge groove 306, thereby achieving the injection of dimethyl phosphite into the atomizing device 5. As the blocking seat 307 reverses, the blocking component 308 corresponds to the connecting hole 309, and the blocking component 308 enters the connecting hole 309, thereby blocking the connecting hole 309, and further interrupting the connection between the perfusion tube 2 through the connecting hole 309 and the discharge groove 306 and the inner cavity of the injection tube 4, thereby preventing the injection of dimethyl phosphite into the atomizing device 5. By continuously rotating the blocking seat 307 forward and backward, the intermittent injection of dimethyl phosphite into the atomizing device 5 is achieved, so that the atomizing device 5 fully atomizes the dimethyl phosphite, avoiding the inability to obtain a sufficient evaporation effect when it contacts the evaporation component 8.

[0064] Furthermore, the blocking assembly 308 includes a plurality of mounting grooves 3081, which are evenly distributed around the blocking seat 307. A spring 3082 is fixedly mounted on the bottom of the inner wall of each mounting groove 3081, and a blocking head 3083 is fixedly mounted on one end of the spring 3082. The blocking head 3083 is slidably engaged with the mounting groove 3081 and is adapted to the communicating hole 309. The surface of the blocking head 3083 that enters the communicating hole 309 is an arc surface.

[0065] The connecting hole 309 corresponds to the plugging assembly 308 one-to-one, and in the initial state, the arcuate portion of the plugging head 3083 is located in the connecting hole 309. When the plugging seat 307 rotates, the arcuate surface of the plugging head 3083 is squeezed against the inner wall of the connecting hole 309, so that the plugging head 3083 is pressed and slides relative to the mounting groove 3081 to compress the ejection spring 3082, and the upper surface of the plugging head 3083 fits against the lower surface of the connecting seat 301, thereby achieving the misalignment of the plugging head 3083 and the connecting hole 309. Since the drainage groove 306 is located between two adjacent plugging heads 3083, when the plugging head 3083 and the connecting hole 309 are misaligned, the connecting hole 309 corresponds to the drainage groove 306, thereby achieving the communication between the perfusion tube 2 and the inner cavity of the injection tube 4 through the connecting hole 309 and the drainage groove 306.

[0066] When the blocking seat 307 is reset (i.e., the blocking seat 307 rotates in the opposite direction), the blocking head 3083 corresponds to the connecting hole 309 again. At this time, due to the elastic force of the ejection spring 3082, the blocking head 3083 enters the connecting hole again under the action of the elastic force, so that the blocking head 3083 blocks the connecting hole 309, thereby achieving the interruption of the injection of dimethyl phosphite into the atomizing device 5.

[0067] Furthermore, for the above-mentioned driving member 7, the driving member 7 includes a suspension column 701, which is embedded and fixed on the top loading plate 10, and an active tooth 702 is rotatably installed on the lower surface of the suspension column 701, and the active tooth 702 penetrates and is threadedly engaged with a driving screw 703, and a force rod 705 is fixedly installed on the lower surface of the driving screw 703. The end of the force rod 705 that is squeezed by the trigger member 6 is a wedge block, and a cross-limiting column 704 is fixedly installed on the upper surface of the driving screw 703. The cross-limiting column 704 penetrates and is slidably connected to the upper surface of the suspension column 701;

[0068] The driving teeth 702 are meshed with driven teeth 706 , and the driven teeth 706 are fixedly sleeved on the outer surface of the blocking seat 307 to drive the blocking seat 307 to rotate;

[0069] The cross-limiting column 704 is coaxially provided with a return spring 707, and the two ends of the return spring 707 are respectively fixedly mounted on the top of the inner wall of the suspension column 701 and the upper surface of the driving screw 703;

[0070] When the trigger member 6 squeezes the wedge block at one end of the force-bearing rod 705, the force-bearing rod 705 moves upward along the central axis of the kettle body 1, thereby pushing the driving screw 703 to move upward under the action of the freedom limit of the cross limit column 704. Since the driving screw 703 is threadedly engaged with the active tooth 702, when the driving screw 703 can only move up and down under the freedom limit of the cross limit column 704, the driving screw 703 moves upward, thereby driving the active tooth 702 to rotate. Since the active tooth 702 is engaged with the driven tooth 706, when the active tooth 702 rotates, the driven tooth 706 also rotates. Since the driven tooth 706 is fixedly mounted on the blocking seat 307 and is connected to the blocking seat 307 with the same central axis, when the driven tooth 706 rotates, the blocking seat 307 is synchronously driven to rotate;

[0071] When the driving screw 703 moves upward under the action of the cross limit column 704, since the cross limit column 704 is coaxially provided with a reset spring 707, and the two ends of the reset spring 707 are respectively fixedly mounted on the top of the inner wall of the suspension column 701 and the upper surface of the driving screw 703, the reset spring 707 is squeezed and deformed. After the squeezing of the force-bearing rod 705 disappears, the elastic force of the reset spring 707 is released, thereby driving the driving screw 703 to move downward to reset, and then the driving screw 703 drives the active tooth 702 to rotate in the opposite direction, that is, drives the blocking seat 307 to rotate in the opposite direction through the driven tooth 706.

[0072] Furthermore, for the above-mentioned atomizing device 5, the atomizing device 5 includes a spinning disc 501, the upper surface of the spinning disc 501 is fixedly mounted on the inner wall of the kettle body 1, an atomizing fence 502 is fixedly mounted on the upper surface of the spinning disc 501, and the injection pipe 4 passes through and is fixedly connected to the atomizing fence 502;

[0073] An impeller 503 is rotatably mounted on the bottom of the inner wall of the spinning disc 501, and an output shaft of a motor 504 is fixedly mounted on the bottom end of the impeller 503. The output shaft of the motor 504 penetrates and rotatably connects the spinning disc 501 and the kettle body 1, and the motor 504 is fixedly mounted on the bottom of the kettle body 1;

[0074] The motor 504 is started. As the speed of the motor 504 gradually increases, the impeller 503 is driven to gradually accelerate. When the set speed range is reached, the dimethyl phosphite is introduced into the spinner 501. Under the action of the centrifugal force generated by the high-speed rotation of the impeller 503, the dimethyl phosphite is thrown onto the spinner 501 and then broken into fine particles after passing through the atomizing fence 502, thereby forming a water mist. In addition, due to the setting of the impeller 503, an outward blowing force is generated, so that the water mist is moved toward the evaporation component 8 under the action of the centrifugal force and blowing force of the impeller 503. The water mist uses the evaporation component 8 to evaporate the hydrogen chloride gas contained in the water mist, thereby achieving a distillation effect.

[0075] Furthermore, the trigger member 6 includes a trigger seat 601, which is fixedly mounted on the output shaft of the motor 504. The trigger seat 601 is provided with a T-shaped slot 602, and a T-shaped trigger block 603 is slidably connected to the T-shaped slot 602. The T-shaped trigger block 603 passes through and is slidably connected to a guide rod 604. The guide rod 604 is fixedly mounted on the T-shaped slot 602, and a centrifugal spring 605 is coaxially provided on the guide rod 604. The two ends of the centrifugal spring 605 are respectively fixedly mounted on the T-shaped trigger block 603 and the T-shaped slot 602.

[0076] When the trigger seat 601 rotates with the rotation of the motor 504, the T-shaped trigger block 603 on the trigger seat 601 is subjected to centrifugal force, which overcomes the pulling force of the centrifugal spring 605, thereby gradually moving away from the central axis of the kettle body 1 until the distance between the trigger block 603 and the central axis of the kettle body 1 is equal to the distance between the force-bearing rod 705 and the kettle body 1 (that is, the speed of the motor 504 reaches the set speed threshold). At this time, when the trigger block 603 tries to trigger the seat 601 to perform a circular motion, it can continuously squeeze the force-bearing rod 705.

[0077] Furthermore, for the above-mentioned evaporation component 8, the evaporation component 8 includes an evaporation fin 801 and an evaporation wall 802. The evaporation wall 802 and the kettle body 1 form a heat chamber. The evaporation fin 801 is in contact with the heat chamber. The upper and lower parts of the heat chamber are respectively provided with an evaporation liquid inlet hole 803 and an evaporation liquid outlet hole 804.

[0078] The cooling assembly 9 includes a cooling fin 901 and an outer tube 902. The outer tube 902 and the perfusion tube 2 form a cooling cavity. The cooling fin 901 fits the cooling cavity. The upper and lower parts of the cooling cavity are respectively provided with a cooling liquid inlet 903 and a cooling liquid outlet 904. The top loading plate 10 is penetrated and installed with an exhaust pipe 12. The exhaust pipe 12 is externally connected to a negative pressure pump. The bottom of the kettle body 1 is penetrated and installed with a discharge pipe 13.

[0079] In addition, the evaporation component 8 is based on the principle of a heat exchanger. A high-temperature liquid is introduced through the evaporation liquid inlet 803 to make the temperature of the evaporation wall 802 reach the boiling point of hydrogen chloride. The evaporated hydrogen chloride is then sucked out through the negative pressure pump and the exhaust pipe 12, while the dimethyl phosphite flows along the evaporation wall 802 to the bottom of the kettle body 1 and is discharged through the discharge pipe 13.

[0080] The cooling assembly 9 mainly uses water cooling heat exchange to absorb heat from the perfusion tube 2. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A deacidification device for use in a dimethyl phosphite production process, comprising a kettle (1) and a perfusion pipe (2), wherein the perfusion pipe (2) is coaxially mounted on the upper portion of the kettle (1) and its discharge end is located inside the kettle (1), characterized in that: A pouring head (3) is provided at the discharge end of the pouring pipe (2), and the pouring head (3) is sealedly connected to an injection pipe (4). An atomizing device (5) is provided at the lower part of the inner cavity of the kettle body (1), and the injection pipe (4) is used to transport liquid to the atomizing device (5). A triggering member (6) is installed on the atomizing device (5), and the atomizing device (5) and the triggering member (6) rotate synchronously around the central axis of the kettle body (1). The pouring head (3) is dynamically connected to a driving member (7); The trigger member (6) rotates with the atomizing device (5) to change its movement radius, so that it is squeezed by the driving member (7) during the rotation process, the driving member (7) is pressed to drive the irrigation head (3) to rotate in the forward direction, the irrigation head (3) rotates in the forward direction to connect the irrigation tube (2) with the injection tube (4), the trigger member (6) is separated from the driving member (7) to reset the driving member (7), the driving member (7) is reset to drive the irrigation head (3) to rotate in the reverse direction, and the irrigation head (3) rotates in the reverse direction to block the irrigation tube (2) and the injection tube (4); A top loading plate (10) is fixedly mounted on the upper portion of the inner wall of the kettle body (1); The perfusion head (3) comprises a connecting seat (301), a supporting shaft (305) is coaxially fixedly mounted on the connecting seat (301), and a blocking seat (307) is fixedly mounted on one end of the supporting shaft (305); The driving member (7) includes a suspension column (701), the suspension column (701) is embedded and fixed on the top loading plate (10), and a driving tooth (702) is rotatably mounted on the lower surface of the suspension column (701), a driving screw (703) passes through the driving tooth (702) and is threadedly engaged with the driving tooth (702), a force rod (705) is fixedly mounted on the lower surface of the driving screw (703), and one end of the force rod (705) pressed against the trigger member (6) is a wedge block, and a cross limiting column (704) is fixedly mounted on the upper surface of the driving screw (703), and the cross limiting column (704) passes through and is slidably connected to the upper surface of the suspension column (701); The driving teeth (702) are meshed with driven teeth (706), and the driven teeth (706) are fixedly sleeved on the outer surface of the blocking seat (307) to drive the blocking seat (307) to rotate; A return spring (707) is coaxially arranged on the cross limiting column (704), and two ends of the return spring (707) are respectively fixedly mounted on the top of the inner wall of the suspension column (701) and the upper surface of the driving screw (703).

2. A deacidification device for use in a dimethyl phosphite production process according to claim 1, characterized in that: The inner wall of the kettle body (1) is provided with an evaporation component (8), and the atomization device (5) rotates to atomize the liquid introduced through the injection pipe (4) and blow it toward the evaporation component (8). The evaporation component (8) is used to provide the temperature required for distillation of the liquid after atomization, and the outer surface of the perfusion pipe (2) is provided with a cooling component (9), and the cooling component (9) is used to reduce the temperature inside the perfusion pipe (2).

3. A deacidification device for use in a dimethyl phosphite production process according to claim 2, characterized in that: The top loading plate (10) is fixedly connected to the perfusion pipe (2), and the perfusion pipe (2) is fixedly connected to the injection pipe (4) via a bridging frame (11), so that the perfusion head (3) is rotatably mounted relative to the injection pipe (4) and the perfusion pipe (2).

4. A deacidification device for use in a dimethyl phosphite production process according to claim 3, characterized in that: The connecting seat (301) is fixedly mounted on the inner wall of the discharge end of the perfusion pipe (2), a plurality of connecting holes (309) are provided on the connecting seat (301), a limiting column (303) is provided on the upper surface of the connecting seat (301), a limiting ring (302) is fitted on the upper surface of the connecting seat (301), a rotation limiting groove (304) is provided on the lower surface of the limiting ring (302), and the rotation limiting groove (304) is tangent to the limiting column (303); A blocking assembly (308) is provided on the blocking seat (307) for blocking the communicating hole (309), and a drain groove (306) is provided between adjacent blocking assemblies (308) for communicating with the communicating hole (309).

5. A deacidification device for use in a dimethyl phosphite production process according to claim 4, characterized in that: The blocking assembly (308) comprises a plurality of mounting grooves (3081), the mounting grooves (3081) being evenly distributed on the blocking seat (307) on a circumference, a ejection spring (3082) being fixedly mounted on the bottom of the inner wall of each mounting groove (3081), a blocking head (3083) being fixedly mounted on one end of the ejection spring (3082), the blocking head (3083) being slidably engaged with the mounting groove (3081) and being adapted to the communicating hole (309), and the surface of the blocking head (3083) that enters the communicating hole (309) being an arc surface.

6. A deacidification device for use in a dimethyl phosphite production process according to claim 5, characterized in that: The atomizing device (5) comprises a spinning disc (501), the upper surface of the spinning disc (501) being fixedly mounted on the inner wall of the kettle body (1), an atomizing fence (502) being fixedly mounted on the upper surface of the spinning disc (501), and the injection pipe (4) passing through and fixedly connected to the atomizing fence (502); An impeller (503) is rotatably mounted on the bottom of the inner wall of the spinning disc (501), and an output shaft of a motor (504) is fixedly mounted on the bottom end of the impeller (503). The output shaft of the motor (504) penetrates and rotatably connects the spinning disc (501) and the kettle body (1), and the motor (504) is fixedly mounted on the bottom of the kettle body (1).

7. A deacidification device for use in a dimethyl phosphite production process according to claim 6, characterized in that: The trigger member (6) includes a trigger seat (601), the trigger seat (601) is fixedly mounted on the output shaft of the motor (504), and the trigger seat (601) is provided with a T-shaped slide groove (602), the T-shaped slide groove (602) is slidably connected to a T-shaped trigger block (603), a guide rod (604) passes through the T-shaped trigger block (603) and is slidably connected to the T-shaped trigger block (603), the guide rod (604) is fixedly mounted on the T-shaped slide groove (602), and a centrifugal spring (605) is coaxially arranged on the guide rod (604), and two ends of the centrifugal spring (605) are respectively fixedly mounted on the T-shaped trigger block (603) and the T-shaped slide groove (602).

8. A deacidification device for use in a dimethyl phosphite production process according to claim 7, characterized in that: The evaporation assembly (8) comprises an evaporation fin (801) and an evaporation wall (802), the evaporation wall (802) and the kettle body (1) form a heat chamber, the evaporation fin (801) fits in the heat chamber, and the upper and lower parts of the heat chamber are respectively provided with an evaporation liquid inlet hole (803) and an evaporation liquid outlet hole (804); The cooling assembly (9) comprises cooling fins (901) and an outer tube (902), wherein the outer tube (902) and the perfusion tube (2) form a cooling cavity, the cooling fins (901) are fitted into the cooling cavity, and the upper and lower parts of the cooling cavity are respectively provided with a cooling liquid inlet hole (903) and a cooling liquid outlet hole (904).

9. A deacidification device for use in a dimethyl phosphite production process according to claim 8, characterized in that: An exhaust pipe (12) passes through the top loading plate (10) and is installed on the top loading plate (10), and the exhaust pipe (12) is externally connected to a negative pressure pump; and a discharge pipe (13) passes through and is installed at the bottom of the kettle body (1).

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