A tricyanogen chloride production device and production process

Abstract

The application provides a cyanuric chloride production device and production process, and relates to the technical field of cyanuric chloride production. The tank body is provided with a liquid distributor. The liquid distributor comprises an inner tube and an outer tube. A climbing film cavity is formed in the inner tube. A falling film cavity is formed between the outer tube and the inner tube. Under the action of the gas material, the liquid material passes through the climbing film cavity and the falling film cavity in sequence. When in the climbing film cavity, the liquid material is distributed into a film on the inner wall of the inner tube and flows upward. When in the falling film cavity, the liquid material is distributed into a film on the outer wall of the inner tube and the inner wall of the outer tube and flows downward. The liquid material and the gas material perform mass transfer reaction in the climbing film cavity and the falling film cavity in sequence, thereby prolonging the reaction time. When in the falling film cavity, the liquid material is distributed on the outer wall of the inner tube and the inner wall of the outer tube, thereby having a larger distribution range, ensuring sufficient reaction and reaction efficiency between raw materials, and eliminating the need for an external circulation system. The device has a simple structure and a small size.

Description

Technical Field

[0001] This invention relates to the field of cyanuric chloride production technology, and in particular to a cyanuric chloride production equipment and production process. Background Technology

[0002] Many chemical processes involve gas-liquid phase reactions, and reactor selection requires comprehensive consideration of factors such as reaction rate, heat effect intensity, and interfacial area. For instantaneous or rapid reactions with large heat effects, membrane reactors are a viable option due to their advantages such as large heat transfer area, low gas resistance, and controllable gas-liquid contact time. For example, in the production of fine chemical intermediates including cyanuric chloride, chlorination reactions are often used. These reactions release a large amount of heat, placing high demands on the heat and mass transfer performance of the reactor. Cyanuric chloride is an important fine chemical intermediate widely used in pesticides (such as triazine herbicides), reactive dyes, fluorescent whitening agents, rubber accelerators, and pharmaceuticals. Industrially, cyanuric chloride is mainly produced using two process routes: the sodium cyanide method and the hydrogen cyanide method.

[0003] In membrane reactors, falling film reactors employ a tubular structure. Liquid flows uniformly downwards in a film-like form along the inner walls of each heat exchange tube under gravity, via a liquid distributor on the upper tube sheet. Gas can enter from the bottom and react with the liquid film in a counter-current or co-current manner. A heat carrier is circulated between the tubes to precisely maintain the required temperature conditions for the reaction, making it suitable for instantaneous or rapid reaction processes with high thermal effects. Rising film reactors, on the other hand, add liquid to the lower part of the tubes. A high-speed upward airflow propels the liquid upwards along the tube wall in a film-like form, resulting in higher gas-liquid mass transfer intensity than falling film reactors. Rotating gas-liquid flow membrane reactors are equipped with vortex generators inside each tube. The airflow passes through the vortex generators, throwing the liquid against the tube wall and causing it to rotate in a liquid film. The spiral flow path effectively enhances gas-liquid mass and heat transfer efficiency and can adapt to lower liquid spray densities.

[0004] When producing cyanuric chloride, if a falling film reactor is used for the chlorination reaction, the liquid material flows downward along the inner wall of the heat exchange tube in the form of a liquid film. Due to the limited tube length, the single-pass residence time of the liquid film is short, which cannot guarantee sufficient reaction between the raw materials. If an external circulation system is added to return some of the outlet material to the inlet to extend the total average reaction time, it will increase the complexity of the equipment.

[0005] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] Therefore, it is necessary to provide a cyanuric chloride production equipment and process to address the problems existing in current falling film reactors.

[0007] The above objectives are achieved through the following technical solutions: A cyanuric chloride production device includes a tank with multiple vertically aligned liquid distributors arranged side-by-side inside the tank. Each liquid distributor includes an inner tube and an outer tube that are coaxial and nested together. The walls of both the inner and outer tubes are hollow and filled with a heat carrier. A rising film cavity is formed inside the inner tube, and a falling film cavity is formed between the outer and inner tubes. The upper end of the rising film cavity is connected to the upper end of the falling film cavity. Under the action of gaseous material, the liquid material passes through the rising film cavity and the falling film cavity in sequence. In the rising film cavity, the liquid material is distributed and forms a film on the inner wall of the inner tube and flows upward. In the falling film cavity, the liquid material is distributed and forms a film on the outer wall of the inner tube and the inner wall of the outer tube and flows downward.

[0008] Furthermore, a demister assembly is provided within the falling film chamber. The demister assembly includes a septum ring, an outer plate, and an inner plate. The septum ring is coaxial with the inner and outer tubes. Multiple outer plates are located outside the septum ring and are evenly distributed along its circumference. The inner side of the outer plate is higher than its outer side in the radial direction of the septum ring. The outer side of the outer plate is connected to the inner wall of the outer tube. The outer plate has a first beginning end and a first end in the circumferential direction of the septum ring. The first beginning end is higher than the first end. Gas and liquid materials flow from the first beginning end to the first end. The outline of the first end is skewed from the axis of the septum ring. The outer plate slopes from the first end to the first tail end, from the outer side to the inner side of the outer plate; multiple inner plates are located inside the partition ring and are evenly distributed along the circumference of the partition ring. The outer side of the inner plate is higher than its inner side in the radial direction of the partition ring. The inner side of the inner plate is connected to the outer wall of the inner tube. The inner plate has a second first end and a second tail end in the circumference of the partition ring. The second first end is higher than the second tail end. Gas materials and liquid materials flow from the second first end to the second tail end. The straight line containing the outline of the second tail end is not in the same plane as the axis of the partition ring. The outline of the second tail end slopes from the second first end to the second tail end, from the inner side to the outer side of the outer plate.

[0009] Furthermore, the bottom of the partition ring is provided with a first overflow groove and a second overflow groove. Both the first overflow groove and the second overflow groove are annular and coaxial with the inner tube and the outer tube. The first overflow groove is located outside the partition ring, and a first blocking member is provided at the first tail end along its outline direction. The inner side of the first blocking member extends to the partition ring, and a first notch is provided on the outer side of the first blocking member. Liquid material on the first blocking member can flow out from the first notch and fall into the first overflow groove. The outer side of the first overflow groove is spaced apart from the inner wall of the outer tube. The second overflow groove is located inside the partition ring, and a second blocking member is provided at the second tail end along its outline direction. The outer side of the second blocking member extends to the partition ring, and a second notch is provided on the inner side of the second blocking member. Liquid material on the second blocking member can flow out from the second notch and fall into the second overflow groove. The inner side of the second overflow groove is spaced apart from the outer wall of the inner tube.

[0010] Furthermore, the first overflow trough and the second overflow trough are provided with connecting pipes for connecting the two.

[0011] Furthermore, multiple defoaming components are evenly distributed both above and below.

[0012] Furthermore, the tank is equipped with a baffle plate that divides the interior of the tank into a lower chamber and an upper chamber. The lower end of the inner tube is fixed to the baffle plate and the rising film chamber is connected to the lower chamber. The lower chamber is used to contain unreacted liquid materials and unreacted gaseous materials. The lower end of the outer tube is located above the baffle plate and the falling film chamber is connected to the upper chamber. The upper chamber is used to contain reacted liquid materials and reacted gaseous materials.

[0013] Furthermore, the partition is equipped with a conveyor, which is used to transport the reacted liquid material in the upper chamber to the lower chamber.

[0014] Furthermore, a first chamber is formed inside the inner tube wall, and a second chamber is formed inside the outer tube wall, with the first chamber and the second chamber connected. The tank body is provided with an inlet pipe and an outlet pipe. One end of the inlet pipe is connected to an external heating device, and the other end is connected to the lower end of the first chamber, for introducing heat carrier into the first chamber. The outlet pipe is connected to the upper end of the second chamber, for discharging heat carrier from the second chamber.

[0015] Furthermore, a connecting pipe is provided between the inner tube and the outer tube. The connecting pipe is used to connect the first chamber and the second chamber. Two connecting pipes are provided, one at the bottom and one at the top. The lower connecting pipe connects the lower part of the first chamber to the lower part of the second chamber, and the upper connecting pipe connects the upper part of the first chamber to the upper part of the second chamber.

[0016] This invention also provides the following technical solutions: A process for producing cyanuric chloride includes the following steps: Liquid material is introduced into the lower cavity until it covers the lower end of the inner tube; The gas material in the lower chamber is introduced, and the liquid material in the lower chamber enters the rising film chamber along with the gas material. The liquid material is distributed on the inner wall of the inner tube to form a film and flows upward. During this period, the liquid material and the gas material undergo mass transfer reaction. The liquid material enters the falling film chamber along with the gaseous material, and the liquid material forms a film on the outer wall of the inner tube and the inner wall of the outer tube and flows downward. During this period, the liquid material and the gaseous material continue to undergo mass transfer reaction. The reacted liquid and gaseous materials are discharged from the lower end of the outer tube to the upper chamber.

[0017] The present invention has at least the following beneficial effects: Under the action of the gaseous material, the liquid material passes through the rising film chamber and the falling film chamber in sequence. In the rising film chamber, the liquid material forms a film on the inner wall of the inner tube and flows upward. In the falling film chamber, the liquid material forms a film on the outer wall of the inner tube and the inner wall of the outer tube and flows downward. This allows the liquid material to undergo mass transfer reaction with the gaseous material in the rising film chamber and the falling film chamber, thus prolonging the reaction time. In the falling film chamber, the liquid material is distributed on the outer wall of the inner tube and the inner wall of the outer tube, with a larger distribution range, which can ensure sufficient reaction between raw materials and reaction efficiency. Moreover, there is no need to add an external circulation system, and the equipment has a simple structure and small size. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a cyanuric chloride production equipment provided in an embodiment of the present invention; Figure 2 for Figure 1 Side view; Figure 3 for Figure 2 Sectional view along axis AA; Figure 4 This is a schematic diagram of a liquid distributor. Figure 5 for Figure 4 BB-direction sectional view; Figure 6 for Figure 5 A magnified view of a section at point C; Figure 7 for Figure 5 A magnified view of a section at point D; Figure 8 for Figure 4 EE-directed sectional view; Figure 9 This is a schematic diagram of the demister assembly. Figure 10 for Figure 9 A magnified view of a section at point F in the middle; Figure 11 for Figure 9 The front view; Figure 12 for Figure 11 GG-direction sectional view; Figure 13 for Figure 12 A magnified view of a section at point H in the middle; Figure 14 for Figure 9 Top view; Figure 15 for Figure 14 A cross-sectional view of the JJ direction; Figure 16 for Figure 15 A magnified view of a section at point K; Figure 17 for Figure 9 A bottom view.

[0019] in: 100. Tank body; 101. Baffle plate; 102. Liquid inlet; 103. Liquid outlet; 104. Air inlet; 105. Exhaust outlet; 106. Mesh plate; 201. Inner tube; 202. Outer tube; 203. Rising film chamber; 204. Falling film chamber; 205. Flow guide; 211. First chamber; 212. Second chamber; 213. Inlet pipe; 214. Outlet pipe; 215. Connecting pipe; 301. Spacer ring; 302. Outer plate; 303. Inner plate; 311. First overflow groove; 312. Second overflow groove; 313. First blocking element; 314. First notch; 315. Second blocking element; 316. Second notch; 317. Connecting pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 1 to 17 As shown, this embodiment of the invention provides a cyanuric chloride production device, including a tank 100. Multiple vertically aligned liquid distributors are arranged side-by-side inside the tank 100. Each liquid distributor includes an inner tube 201 and an outer tube 202 that are coaxial and nested within each other. The walls of both the inner and outer tubes 201 and 202 are hollow and filled with a heat carrier. A rising film cavity 203 is formed inside the inner tube 201, and a falling film cavity 204 is formed between the outer tube 202 and the inner tube 201. The upper end of the rising film cavity 203 is connected to the upper end of the falling film cavity 204. Under the action of gaseous material, the liquid material passes sequentially through the rising film cavity 203 and the falling film cavity 204. Within the rising film cavity 203, the liquid material forms a film on the inner wall of the inner tube 201 and flows upwards. Within the falling film cavity 204, the liquid material forms a film on the outer wall of the inner tube 201 and the inner wall of the outer tube 202 and flows downwards.

[0024] Under the action of the gaseous material, the liquid material passes through the rising film chamber 203 and the falling film chamber 204 in sequence. In the rising film chamber 203, the liquid material forms a film on the inner wall of the inner tube 201 and flows upward. In the falling film chamber 204, the liquid material forms a film on the outer wall of the inner tube 201 and the inner wall of the outer tube 202 and flows downward. This allows the liquid material to undergo mass transfer reaction with the gaseous material in the rising film chamber 203 and the falling film chamber 204 in sequence, thus prolonging the reaction time. In the falling film chamber 204, the liquid material is distributed on the outer wall of the inner tube 201 and the inner wall of the outer tube 202, which has a larger distribution range. This ensures sufficient reaction between the raw materials and high reaction efficiency. Furthermore, no external circulation system is required, and the equipment has a simple structure and small size.

[0025] This invention can produce cyanuric chloride using either the sodium cyanide method or the hydrogen cyanide method. When using the sodium cyanide method, a sodium cyanide solution with a mass fraction of approximately 30% from the tank farm is prepared into an aqueous solution with a mass fraction of approximately 15%. That is, the liquid material is a 15% sodium cyanide aqueous solution, and the gaseous material is chlorine gas. The gaseous cyanuric chloride monomer generated by the reaction is cooled and dehydrated by circulating cooling water in a primary cooler, then cooled and dehydrated by constant-temperature water in a secondary cooler, and finally enters a tertiary calcium chloride dryer for further dehydration and drying, so that the water content in the cyanuric chloride monomer reaches below 0.01% by mass. The dried cyanuric chloride monomer enters the polymerization reactor, where gaseous cyanuric chloride is generated under the action of activated carbon catalyst. It then crystallizes in cold air at approximately -20°C to produce powdered cyanuric chloride product. In the hydrogen cyanide method, the liquid material is liquid hydrogen cyanide, and the gaseous material is chlorine gas. The chlorocyanide gas generated by the reaction is washed and dehydrated by constant-temperature water cooling, then enters a water mist collector for further dehydration. After being dried with calcium sulfate desiccant, it enters a polymerization reactor containing an activated carbon catalyst in gaseous form to generate cyanuric chloride gas. Finally, it enters a crystallizer, where it undergoes indirect cooling crystallization to obtain solid cyanuric chloride product. The above two methods and specific operations for producing cyanuric chloride are existing technologies and will not be elaborated upon here.

[0026] See also Figures 1 to 3 The tank body 100 is equipped with a partition 101, which divides the interior of the tank body 100 into a lower chamber and an upper chamber. The lower end of the inner tube 201 is fixed to the partition 101 and the rising film chamber 203 communicates with the lower chamber. The lower chamber is used to contain unreacted liquid and gaseous materials. The lower end of the outer tube 202 is located above the partition 101 and the falling film chamber 204 communicates with the upper chamber. The upper chamber is used to contain reacted liquid and gaseous materials. The bottom of the tank body 100 is equipped with a liquid inlet 102, a liquid outlet 103, and a gas inlet 104, all of which communicate with the lower chamber. The liquid inlet 102 is used to introduce liquid materials into the lower chamber, the liquid outlet 103 is used to discharge the remaining liquid materials in the lower chamber when the reaction is complete, and the gas inlet 104 is used to introduce gaseous materials into the lower chamber. The top of the tank body 100 is equipped with an exhaust port 105, which communicates with the upper chamber. The exhaust port 105 is used to discharge gaseous materials or generated gaseous products after the reaction is complete. The lower end of the inner tube 201 is lower than the lower end of the outer tube 202, and the lower end of the inner tube 201 is lower than the partition 101, allowing the liquid material in the lower chamber to submerge the lower end of the inner tube 201. The total height of the rising film chamber 203 is greater than the total height of the falling film chamber 204. The lower end of the outer tube 202 is located above the partition 101, allowing the reacted liquid and gaseous materials in the falling film chamber 204 to be discharged into the upper chamber. The partition 101 is equipped with a conveying component to transport the reacted liquid material in the upper chamber to the lower chamber, thereby improving the reaction and utilization of the liquid material. The conveying component can be an electric pump, equipped with a corresponding power supply and control module to control start / stop and related conveying parameters.

[0027] See also Figure 3 The tank body 100 has two mesh plates 106 spaced vertically inside. Each mesh plate 106 has multiple fixing holes and multiple through holes. The outer tube 202 is fixed in the fixing hole of the upper mesh plate 106, and the upper and lower sides of the mesh plate 106 are connected through the through holes. The inner tube 201 is fixed in the fixing hole of the lower mesh plate 106, and the upper and lower sides of the mesh plate 106 are also connected through the through holes. (See also...) Figure 6 The upper ends of the rising film chamber 203 and the falling film chamber 204 are both provided with a guide 205. The guide 205 is used to guide the liquid in the rising film chamber 203 to the falling film chamber 204. The lower surface of the guide 205 is concave upward to form an annular groove. This annular groove is coaxial with the outer tube 202 and the inner tube 201, and the bottom of the annular groove is an arc surface pointing from the rising film chamber 203 to the falling film chamber 204. Furthermore, the upper end of the inner tube 201 can be rounded. In conjunction with the guide 205, the thickness fluctuation of the liquid film when flowing from the rising film chamber 203 to the falling film chamber 204 can be reduced, thereby reducing the generation of droplets in the liquid film.

[0028] See also Figure 3 , Figure 6 and Figure 7The inner tube 201 has a first chamber 211 formed within its wall, and the outer tube 202 has a second chamber 212 formed within its wall. The first chamber 211 and the second chamber 212 are connected. The tank body 100 is equipped with an inlet pipe 213 and an outlet pipe 214. One end of the inlet pipe 213 is connected to an external heating device, and the other end is connected to the lower end of the first chamber 211, for introducing heat transfer fluid into the first chamber 211. The outlet pipe 214 is connected to the upper end of the second chamber 212, for discharging heat transfer fluid from the second chamber 212. Both the inlet pipe 213 and the outlet pipe 214 are composed of multiple pipe bodies, allowing the inlet pipe 213 to connect to the first chamber 211 of all inner tubes 201, and the outlet pipe 214 to connect to the second chamber 212 of all outer tubes 202. The heat transfer fluid can be heat transfer oil or water, etc. The external heating equipment includes components such as a circulating pump, used to deliver heat carrier to the inlet pipe 213. Its structure and working principle are existing technologies and will not be described in detail here. A connecting pipe 215 is provided between the inner pipe 201 and the outer pipe 202. The connecting pipe 215 is used to connect the first chamber 211 and the second chamber 212. Two connecting pipes 215 are arranged vertically. The lower connecting pipe 215 connects the lower part of the first chamber 211 to the lower part of the second chamber 212, and the upper connecting pipe 215 connects the upper part of the first chamber 211 to the upper part of the second chamber 212. The heat carrier delivered by the external heating equipment enters the lower end of the first chamber 211 through the inlet pipe 213, and then enters the lower end of the second chamber 212 through the connecting pipe 215 located below. The heat carriers in the first chamber 211 and the second chamber 212 both flow upward. The heat carrier in the first chamber 211 can be discharged to the second chamber 212 through the connecting pipe 215 located above, so that the heat carriers in the first chamber 211 and the second chamber 212 are both discharged to the outlet pipe 214.

[0029] In one embodiment, see [link to relevant documentation]. Figures 9 to 17The falling film chamber 204 is equipped with a demisting assembly, which includes a partition ring 301, an outer plate 302, and an inner plate 303. The partition ring 301 is coaxial with the inner tube 201 and the outer tube 202. Multiple outer plates 302 are located outside the partition ring 301 and are evenly distributed along the circumference of the partition ring 301. The inner side of the outer plate 302 is higher than the outer side of the partition ring 301 in the radial direction. The outer side of the outer plate 302 is connected to the inner wall of the outer tube 202. The outer plate 302 has a first head end and a first tail end in the circumference of the partition ring 301. The first head end is higher than the first tail end. Gas and liquid materials flow from the first head end to the first tail end. The straight line containing the outline of the first tail end is skewed from the axis of the partition ring 301. The outline slopes from the first head end to the first tail end and from the outer side to the inner side of the outer plate 302; the inner plate 303 is located inside the partition ring 301 and is evenly distributed in multiple circumferential directions along the partition ring 301. The outer side of the inner plate 303 is higher than its inner side in the radial direction of the partition ring 301. The inner side of the inner plate 303 is connected to the outer wall of the inner tube 201. The inner plate 303 has a second head end and a second tail end in the circumferential direction of the partition ring 301. The second head end is higher than the second tail end. Gas materials and liquid materials flow from the second head end to the second tail end. The straight line containing the outline of the second tail end is not in the same plane as the axis of the partition ring 301. The outline of the second tail end slopes from the second head end to the second tail end and from the inner side to the outer side of the outer plate 302.

[0030] When gaseous and liquid materials flow upwards in the rising film chamber 203 and from the rising film chamber 203 to the falling film chamber 204, droplets are generated. If not removed in time, this may increase the fluctuation of the liquid film thickness, or even cause the liquid film to splash, leading to a further increase in droplets and affecting the reaction effect between the raw materials. In this invention, for the outer plate 302, the gaseous and liquid materials flow from the first end to the first end. Since the outline of the first end is deviated from the radial direction of the partition ring 301, the direction of the gaseous and liquid materials when passing through the outer plate 302 is more outward than the radial direction of the partition ring 301, generating a larger centrifugal force, causing the droplets in the droplets to separate from the gas, thereby removing the droplets from the inner wall of the outer tube 202. Similarly, for the inner plate 303, the gaseous and liquid materials flow from the second beginning end to the second end. Since the outline of the second end deviates from the radial direction of the spacer ring 301, the gaseous and liquid materials move more inwards when passing through the inner plate 303 than they do radially with the spacer ring 301, generating a greater centripetal force. This causes the droplets in the spray to separate from the gas, thereby removing the spray from the outer wall of the inner tube 201. By removing the generated spray, fluctuations in the liquid film thickness are reduced, preventing splashing of the liquid film and further increase in spray, thus ensuring the reaction effect between the raw materials.

[0031] Furthermore, when droplets collide with the outer plate 302, larger droplets are captured and detached from the gas within the droplets. Since the inner side of the outer plate 302 is higher than the outer side of the partition ring 301 in the radial direction, the captured droplets will flow from the inner side of the outer plate 302 to the outer side under their own gravity. Similarly, when droplets collide with the inner plate 303, larger droplets are captured and detached from the gas within the droplets. Since the outer side of the inner plate 303 is higher than the inner side of the partition ring 301 in the radial direction, the captured droplets will flow from the outer side of the inner plate 303 to the inner side under their own gravity. This prevents the captured droplets from accumulating on the outer plate 302 or inner plate 303 to form a thick liquid layer, which would increase the flow resistance of the gas and liquid materials. It also prevents the thick liquid layer from being re-blown by the gas material, thus forming secondary droplets and ensuring the defoaming effect. It is understandable that when droplets collide with the outer plate 302 or the inner plate 303, the smaller droplets cannot detach from the gas in the droplets and can only detach from the gas in the droplets by relying on centrifugal force or centripetal force.

[0032] For example, such as Figure 17 As shown, for the outer panel 302, the outline of its first tail end slopes from the first head end to the first tail end (counterclockwise) and from the outside to the inside. For the inner panel 303, the outline of its second tail end slopes from the second head end to the second tail end (counterclockwise) and from the inside to the outside.

[0033] In one embodiment, the bottom of the partition ring 301 is provided with a first overflow groove 311 and a second overflow groove 312. Both the first overflow groove 311 and the second overflow groove 312 are annular and coaxial with the inner tube 201 and the outer tube 202. The first overflow groove 311 is located outside the partition ring 301, and a first blocking member 313 is provided at the first tail end along its outline direction. The inner side of the first blocking member 313 extends to the partition ring 301, and a first notch 314 is provided on the outer side of the first blocking member 313. Liquid material on the first blocking member 313 can flow out from the first notch 314 and fall into the spacer. The first overflow trough 311 is located inside the outer side of the first overflow trough 311 and is spaced apart from the inner wall of the outer tube 202; the second overflow trough 312 is located inside the partition ring 301, and the second tail end is provided with a second blocking member 315 along its outline direction. The outer side of the second blocking member 315 extends to the partition ring 301, and the inner side of the second blocking member 315 is provided with a second notch 316. Liquid material on the second blocking member 315 can flow out from the second notch 316 and fall into the second overflow trough 312. The inner side of the second overflow trough 312 is spaced apart from the outer wall of the inner tube 201.

[0034] For the outer plate 302, centrifugal force causes the droplets in the droplets to separate from the gas. The separated droplets flow along the outer plate 302 to the first blocking member 313 and move towards the inner wall of the outer tube 202 until they flow out from the first notch 314 and fall into the first overflow groove 311. When enough liquid material accumulates in the first overflow groove 311, the liquid material flows from the outside of the first overflow to the outer wall of the inner tube 201 and reforms into a liquid film. Similarly, for the inner plate 303, centripetal force causes the droplets in the droplets to separate from the gas. The separated droplets flow along the inner plate 303 to the second blocking member 315 and move towards the outer wall of the inner tube 201 until they flow out from the second notch 316 and fall into the second overflow groove 312. When enough liquid material accumulates in the second overflow groove 312, the liquid material flows from the inside of the second overflow to the outer wall of the inner tube 201 and reforms into a liquid film. The droplets detached from the droplets are collected in the first overflow tank 311 and the second overflow tank 312 to re-distribute the liquid material evenly on the inner wall of the outer tube 202 and the outer wall of the inner tube 201 to form a film, reduce the fluctuation of the liquid film thickness, reduce the generation of droplets during the subsequent flow of liquid and gas materials, ensure the heat transfer effect of the heat carrier to the liquid material, and at the same time ensure the mass transfer effect between the liquid material and the gas material, further ensuring the reaction effect between the raw materials.

[0035] like Figure 10 As shown, both the first blocking member 313 and the second blocking member 315 are upwardly bent arc-shaped plates, both used to block and collect liquid materials and droplets. The length direction of the first blocking member 313 is parallel to the outline of the first tail end, so as to guide the blocked and collected liquid materials and droplets to the inner wall of the outer tube 202. The length direction of the second blocking member 315 is parallel to the outline of the second tail end, so as to guide the blocked and collected liquid materials and droplets to the outer wall of the inner tube 201.

[0036] In one embodiment, see [link to relevant documentation]. Figure 13 and Figure 17 The first overflow tank 311 and the second overflow tank 312 are provided with a connecting pipe 317 to connect the two, so that the liquid material collected in the first overflow tank 311 and the second overflow tank 312 are at the same height, ensuring that the amount of liquid material overflowing from the outside of the first overflow tank 311 and the second overflow tank 312 is the same, thereby ensuring that the thickness of the liquid film on the inner wall of the outer pipe 202 is consistent with the thickness of the liquid film on the outer wall of the inner pipe 201, and ensuring the consistency of the reaction effect between the raw materials.

[0037] Furthermore, multiple connecting pipes 317 are evenly distributed along the circumference of the partition ring 301.

[0038] In one embodiment, multiple defoaming components are evenly distributed above and below to defoam the entire falling film chamber 204, further ensuring the reaction effect between raw materials.

[0039] This invention also provides a cyanuric chloride production process, including the following steps: Liquid material is introduced into the lower cavity until it covers the lower end of the inner tube 201; The gas material in the lower chamber is introduced, and the liquid material in the lower chamber enters the rising film chamber 203 along with the gas material. The liquid material is distributed and forms a film on the inner wall of the inner tube 201 and flows upward. During this period, the liquid material and the gas material undergo mass transfer reaction. The liquid material enters the falling film chamber 204 along with the gaseous material, and the liquid material is distributed and forms a film on the outer wall of the inner tube 201 and the inner wall of the outer tube 202 and flows downward. During this period, the liquid material and the gaseous material continue to undergo mass transfer reaction. The reacted liquid and gaseous materials are discharged from the lower end of the outer tube 202 to the upper chamber.

[0040] The working principle of this invention is as follows: Heat carriers are supplied to the first chamber 211 and the second chamber 212 through an external heating device. Liquid material is introduced into the lower chamber through the liquid inlet 102, so that the liquid material covers the lower end of the inner tube 201. Gas material is introduced into the lower chamber through the air inlet 104, so that the liquid material in the lower chamber enters the rising film chamber 203 along with the gas material. The liquid material is distributed and forms a film on the inner wall of the inner tube 201 and flows upward. During this period, the liquid material and the gas material undergo mass transfer reaction. Afterward, the liquid material enters the falling film chamber 204 along with the gas material. The liquid material is distributed and forms a film on the outer wall of the inner tube 201 and the inner wall of the outer tube 202 and flows downward. During this period, the liquid material and the gas material continue to undergo mass transfer reaction. The liquid material undergoes mass transfer reactions with the gaseous material successively in the rising film chamber 203 and the falling film chamber 204, extending the reaction time. Furthermore, in the falling film chamber 204, the liquid material is distributed on the outer wall of the inner tube 201 and the inner wall of the outer tube 202, providing a wider distribution range and ensuring sufficient reaction between the raw materials and high reaction efficiency. No external circulation system is required, resulting in a simple structure and small size. The reacted liquid and gaseous materials are discharged from the lower end of the outer tube 202 to the upper chamber. The reacted gaseous materials and generated gaseous products are discharged through the exhaust port 105. The reacted liquid material is transported to the lower chamber via a conveyor to participate in the reaction again. Upon completion of the reaction, the remaining liquid material in the lower chamber is discharged through the drain port 103.

[0041] When gaseous and liquid materials flow upward in the rising film chamber 203 and from the rising film chamber 203 to the falling film chamber 204, droplets are generated. When the liquid material enters the falling film chamber 204 along with the gaseous material, for the outer plate 302, the gaseous and liquid materials flow from the first end to the first end. Since the outline of the first end is deviated from the radial direction of the partition ring 301, the direction of the gaseous and liquid materials when passing through the outer plate 302 is more outward than the radial direction of the partition ring 301, generating a large centrifugal force, causing the droplets in the droplets to separate from the gas, thereby clearing the droplets from the inner wall of the outer tube 202. The separated droplets flow along the outer plate 302 to the first blocking member 313 and move towards the inner wall of the outer tube 202 until they flow out from the first notch 314 and fall into the first overflow groove 311. When enough liquid material accumulates in the first overflow groove 311, the liquid material flows from the outside of the first overflow to the outer wall of the inner tube 201 and reforms into a liquid film. Similarly, for the inner plate 303, gaseous and liquid materials flow from the second beginning end to the second end. Since the outline of the second end deviates from the radial direction of the partition ring 301, the gaseous and liquid materials move more inwards when passing through the inner plate 303 than the radial direction of the partition ring 301, generating a greater centripetal force. This causes the droplets in the spray to separate from the gas, thereby removing the spray from the outer wall of the inner tube 201. The separated droplets flow along the inner plate 303 to the second blocking member 315 and move towards the outer wall of the inner tube 201 until they flow out from the second notch 316 and fall into the second overflow groove 312. When enough liquid material accumulates in the second overflow groove 312, it flows from the inside of the second overflow to the outer wall of the inner tube 201, reforming the liquid film. Therefore, by removing the generated spray, the fluctuation of the liquid film thickness is reduced, preventing splashing of the liquid film and further increase in spray, thus ensuring the reaction effect between the raw materials. Furthermore, the droplets detached from the droplets are collected in the first overflow tank 311 and the second overflow tank 312 to allow the liquid material to be evenly distributed and formed into a film on the inner wall of the outer tube 202 and the outer wall of the inner tube 201, thereby reducing the fluctuation of the liquid film thickness, reducing the generation of droplets during the subsequent flow of liquid and gas materials, ensuring the heat transfer effect of the heat carrier to the liquid material, and ensuring the mass transfer effect between the liquid and gas materials, further ensuring the reaction effect between the raw materials.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A cyanuric chloride production equipment, characterized in that, The system includes a tank body, within which multiple vertically aligned liquid distributors are arranged side-by-side. Each liquid distributor comprises an inner tube and an outer tube that are coaxial and nested within each other. The walls of both the inner and outer tubes are hollow and filled with a heat carrier. A rising film cavity is formed within the inner tube, and a falling film cavity is formed between the outer and inner tubes. The upper ends of the rising film cavity and the falling film cavity are connected. Under the action of the gaseous material, the liquid material passes through the rising film cavity and the falling film cavity sequentially. Within the rising film cavity, the liquid material forms a film on the inner wall of the inner tube and flows upward. Within the falling film cavity, the liquid material forms a film on the outer wall of the inner tube and the inner wall of the outer tube and flows downward. A demister assembly is provided within the falling film chamber. The demister assembly includes a septum ring, an outer plate, and an inner plate. The septum ring is coaxial with the inner and outer tubes. Multiple outer plates are located outside the septum ring and are evenly distributed along its circumference. The inner side of the outer plate is higher than its outer side in the radial direction of the septum ring. The outer side of the outer plate is connected to the inner wall of the outer tube. The outer plate has a first head end and a first tail end in the circumferential direction of the septum ring. The first head end is higher than the first tail end. Gas and liquid materials flow from the first head end to the first tail end. The outline of the first tail end is skewed from the axis of the septum ring. The outline of the first tail end originates from the first head end. The outer plate slopes from the outer side to the inner side of the outer plate to the first tail end; multiple inner plates are located inside the partition ring and are evenly distributed along the circumference of the partition ring. The outer side of the inner plate is higher than its inner side in the radial direction of the partition ring. The inner side of the inner plate is connected to the outer wall of the inner tube. The inner plate has a second head end and a second tail end in the circumference of the partition ring. The second head end is higher than the second tail end. Gas materials and liquid materials flow from the second head end to the second tail end. The straight line containing the outline of the second tail end is not in plane with the axis of the partition ring. The outline of the second tail end slopes from the second head end to the second tail end and from the inner side to the outer side of the outer plate. The bottom of the partition ring is provided with a first overflow groove and a second overflow groove. Both the first overflow groove and the second overflow groove are annular and coaxial with the inner tube and the outer tube. The first overflow groove is located outside the partition ring, and a first blocking member is provided at the first tail end along its outline direction. The inner side of the first blocking member extends to the partition ring, and a first notch is provided on the outer side of the first blocking member. Liquid material on the first blocking member can flow out from the first notch and fall into the first overflow groove. The outer side of the first overflow groove is spaced apart from the inner wall of the outer tube. The second overflow groove is located inside the partition ring, and a second blocking member is provided at the second tail end along its outline direction. The outer side of the second blocking member extends to the partition ring, and a second notch is provided on the inner side of the second blocking member. Liquid material on the second blocking member can flow out from the second notch and fall into the second overflow groove. The inner side of the second overflow groove is spaced apart from the outer wall of the inner tube. The first overflow groove and the second overflow groove are provided with a connecting pipe for connecting the two. The tank is equipped with a baffle that divides the interior of the tank into a lower chamber and an upper chamber. The lower end of the inner tube is fixed to the baffle and the rising film chamber is connected to the lower chamber. The lower chamber is used to contain unreacted liquid materials and unreacted gaseous materials. The lower end of the outer tube is located above the baffle and the falling film chamber is connected to the upper chamber. The upper chamber is used to contain reacted liquid materials and reacted gaseous materials.

2. The cyanuric chloride production equipment according to claim 1, characterized in that, Multiple defoaming components are evenly distributed on the top and bottom.

3. The cyanuric chloride production equipment according to claim 1, characterized in that, The partition is equipped with a conveyor, which is used to transport the reacted liquid material in the upper chamber to the lower chamber.

4. The cyanuric chloride production equipment according to claim 1, characterized in that, The inner tube has a first chamber formed in its wall, and the outer tube has a second chamber formed in its wall. The first chamber and the second chamber are connected. The tank is equipped with an inlet pipe and an outlet pipe. One end of the inlet pipe is connected to an external heating device, and the other end is connected to the lower end of the first chamber, for introducing heat carrier into the first chamber. The outlet pipe is connected to the upper end of the second chamber, for discharging heat carrier from the second chamber.

5. A cyanuric chloride production equipment according to claim 4, characterized in that, A connecting pipe is provided between the inner tube and the outer tube. The connecting pipe is used to connect the first chamber and the second chamber. There are two connecting pipes, one at the bottom and one at the top. The lower connecting pipe connects the lower part of the first chamber to the lower part of the second chamber, and the upper connecting pipe connects the upper part of the first chamber to the upper part of the second chamber.

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