Cyanuric chloride chlorination separation coupling falling film reaction equipment

Abstract

The utility model discloses cyanuric chloride chlorination separation coupling falling film reaction equipment, which relates to the technical field of falling film reaction equipment, and comprises a tank body, end plates are arranged at the upper end and the lower end of the tank body, a falling film pipe is arranged between the two end plates in a penetrating manner, and a small heat dissipation plate is arranged on the outer surface of the falling film pipe. A top cover and a bottom cover are arranged at the upper end and the lower end of the tank body and located on the outer sides of the end plates correspondingly, a cooling liquid inlet pipe is arranged at the position, penetrating through the end plate at the upper end, of the middle position of the top cover, and a cooling liquid outlet pipe is arranged at the position, penetrating through the end plate at the lower end, of the middle position of the bottom cover; a liquid distributor is arranged in the top cover and on the outer side of the cooling liquid inlet pipe, a gas distributor is arranged in the bottom cover and on the outer side of the cooling liquid outlet pipe, and discharging pipes are arranged at the lower end of the bottom cover and on the two sides of the cooling liquid outlet pipe, so that the requirement of the cyanuric chloride chlorination separation reaction process on the heat exchange efficiency is met; the cyanuric chloride chlorination separation reaction efficiency is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of falling film reaction equipment, specifically to a cyanuric chloride chlorination separation coupled falling film reaction equipment. Background Technology

[0002] Currently, the synthesis of cyanuric chloride monomer using sodium cyanide as a raw material involves either a rapid mixing adiabatic reaction or a low-temperature fully mixed flow reaction. The rapid mixing adiabatic reaction involves high temperatures, leading to severe hydrolysis of both raw materials and products at high temperatures. The low-temperature fully mixed flow reaction, on the other hand, produces numerous side reactions. Chlorine reacts with sodium cyanide to produce cyanuric chloride and sodium chloride brine; this reaction is strongly exothermic and rapid. Based on these characteristics, it is proposed to conduct the reaction in a falling film reactor. Sodium cyanide forms a film within the heat exchange tubes while flowing, reacting with chlorine within the tubes to synthesize the monomer. The heat generated by the reaction is carried away by cooling water outside the tubes, maintaining a suitable reaction temperature and avoiding hydrolysis losses due to high temperatures. The co-current reaction also avoids side reactions caused by the reaction. Traditional general-purpose falling film reactor equipment cannot meet the heat exchange efficiency requirements of the cyanuric chloride chlorination separation process, resulting in high ambient temperatures that negatively impact the cyanuric chloride chlorination separation process. Utility Model Content

[0003] The purpose of this invention is to provide a falling film reaction device for cyanuric chloride chlorination separation, in order to solve the problem that the traditional general-purpose falling film reaction device mentioned in the background art cannot meet the heat exchange efficiency requirements of the cyanuric chloride chlorination separation reaction process, resulting in a high reaction environment temperature and affecting the cyanuric chloride chlorination separation reaction process.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a cyanuric chloride chlorination separation coupled falling film reaction device, comprising a tank body, end plates at the upper and lower ends of the tank body, a falling film tube passing through the two end plates, a heat dissipation plate on the outer surface of the falling film tube, a top cover and a bottom cover respectively at the upper and lower ends of the tank body and outside the end plates, a cooling liquid inlet pipe passing through the middle of the upper end plate of the top cover, a cooling liquid outlet pipe passing through the middle of the lower end plate of the bottom cover, a liquid distributor inside the top cover and outside the cooling liquid inlet pipe, a gas distributor inside the bottom cover and outside the cooling liquid outlet pipe, and a discharge pipe at the lower end of the bottom cover and on both sides of the cooling liquid outlet pipe.

[0005] Preferably, the top cover and the bottom cover are fixedly connected to the upper end plate and the lower end plate respectively via flanges. The side wall of the top cover is provided with a liquid inlet corresponding to the position of the liquid distributor, and the side wall of the bottom cover is provided with a gas inlet corresponding to the position of the gas distributor.

[0006] Preferably, the lower end of the cooling inlet pipe extends into the upper part of the tank body, and the lower end side wall of the cooling inlet pipe is provided with an outlet. The upper end of the cooling outlet pipe is correspondingly arranged with the lower end end plate.

[0007] Preferably, both the liquid distributor and the gas distributor are annular tubular structures, and the lower walls of both the liquid distributor and the gas distributor are provided with distribution holes.

[0008] Preferably, the inner cavity of the top cover is connected to the inner cavity of the bottom cover through the falling film tube.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the traditional general-purpose falling film reaction equipment is redesigned, the input and output directions of the coolant are set to correspond with the setting direction of the falling film tube, and a heat dissipation plate is set on the outer surface of the falling film tube to improve the heat exchange efficiency of the falling film tube, meet the heat exchange efficiency requirements of the cyanuric chloride chlorination separation reaction process, control the reaction environment temperature to maintain within a suitable range, and ensure the efficiency of the cyanuric chloride chlorination separation reaction. Attached Figure Description

[0010] Figure 1 This is an isometric sectional view of the main structure of this utility model;

[0011] Figure 2 This is an isometric view of the main structure of this utility model;

[0012] Figure 3 This is a front sectional view of the main structure of this utility model;

[0013] Figure 4 This is a front view schematic diagram of the main structure of this utility model;

[0014] Figure 5 This is a top sectional view of the main structure of this utility model.

[0015] In the diagram: 1-Tank body, 2-End plate, 3-Falling film pipe, 4-Heat dissipation plate, 5-Top cover, 6-Bottom cover, 7-Cooling inlet pipe, 8-Cooling outlet pipe, 9-Liquid distributor, 10-Liquid distributor, 11-Discharge pipe, 12-Liquid input port, 13-Gas input port, 14-Outlet, 15-Distribution hole. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 This utility model provides a cyanuric chloride chlorination separation coupled falling film reaction device, including a tank body 1. The upper and lower ends of the tank body 1 are provided with end plates 2. A falling film tube 3 is provided between the two end plates 2. The outer surface of the falling film tube 3 is provided with a heat dissipation plate 4. The upper and lower ends of the tank body 1 and the outer side of the end plates 2 are respectively provided with a top cover 5 and a bottom cover 6. A cooling liquid inlet pipe 7 is provided through the middle of the upper end plate 2 of the top cover 5. A cooling liquid outlet pipe 8 is provided through the middle of the lower end plate 2 of the bottom cover 6. A liquid distributor 9 is provided inside the top cover 5 and outside the cooling liquid inlet pipe 7. A gas distributor 10 is provided inside the bottom cover 6 and outside the cooling liquid outlet pipe 8. A discharge pipe 11 is provided at the lower end of the bottom cover 6 and on both sides of the cooling liquid outlet pipe 8.

[0018] In use, end plate 2 is sealed to both ends of tank body 1. Top cover 5 and bottom cover 6 are respectively installed on the upper and lower ends of tank body 1 by bolts. Coolant is introduced into the interior of tank body 1 through cooling inlet pipe 7. The coolant fills the space between tank body 1 and end plate 2 and comes into direct contact with falling film tube 3. Heat dissipation plate 4 is installed on the outer surface of falling film tube 3 to increase the contact area between falling film tube 3 and coolant. Coolant flows from top to bottom across the outer surface of falling film tube 3 and heat dissipation plate 4, dissipating the chlorine gas produced by the reaction of chlorine gas and sodium cyanide inside falling film tube 3. The heat is quickly carried away and then output to the outside through the cooling outlet pipe 8. A liquid distributor 9 is set inside the top cover 5 to distribute the sodium cyanide solution onto the upper end plate 2 and form a film that flows downward through the falling film pipe 3. A gas distributor 10 is set inside the bottom cover 6 to distribute chlorine gas inside the bottom cover 6. The chlorine gas flows upward along the falling film pipe 3 and reacts with the sodium cyanide solution inside the falling film pipe 3 to form cyanogen chloride and sodium chloride brine. Cyanogen chloride and sodium chloride brine are output to the outside through the discharge pipe 11 inside the bottom cover 6.

[0019] The top cover 5 and the bottom cover 6 are fixedly connected to the upper end plate 2 and the lower end plate 2 respectively via flanges. The side wall of the top cover 5 is provided with a liquid inlet 12 corresponding to the liquid distributor 9. The side wall of the bottom cover 6 is provided with a gas inlet 13 corresponding to the gas distributor 10. Sodium cyanide solution is introduced into the liquid distributor 9 through the liquid inlet 12, and chlorine gas is introduced into the gas distributor 10 through the gas inlet 13.

[0020] The lower end of the cooling inlet pipe 7 extends into the upper part of the tank body 1. The lower end side wall of the cooling inlet pipe 7 is provided with an outlet 14. The upper end of the cooling outlet pipe 8 is correspondingly arranged with the lower end end plate 2. By providing an outlet 14 at the lower end of the cooling inlet pipe 7, the coolant is guided through the outlet 14 to the outer surface of the falling film pipe 3.

[0021] Both the liquid distributor 9 and the gas distributor 10 are annular tubular structures. The lower walls of both the liquid distributor 9 and the gas distributor 10 are provided with distribution holes 15. Sodium cyanide solution is distributed into the interior of the top cover 5 through the distribution holes 15 on the liquid distributor 9, and chlorine gas is distributed into the interior of the bottom cover 6 through the distribution holes 15 on the gas distributor 10.

[0022] The inner cavity of the top cover 5 is connected to the inner cavity of the bottom cover 6 through the falling film tube 3. The sodium cyanide solution in the top cover 5 flows into the interior of the bottom cover 6 through the falling film tube 3, and the chlorine gas inside the bottom cover 6 flows into the interior of the top cover 5 through the falling film tube 3. The sodium cyanide solution and chlorine gas react inside the falling film tube 3.

[0023] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cyanuric chloride chlorination separation coupled with falling film reaction equipment, characterized in that: The tank includes a tank body (1), with end plates (2) at the upper and lower ends of the tank body (1). A falling film tube (3) is provided between the two end plates (2). A heat dissipation plate (4) is provided on the outer surface of the falling film tube (3). A top cover (5) and a bottom cover (6) are provided at the upper and lower ends of the tank body (1) and on the outside of the end plates (2), respectively. A cooling liquid inlet pipe (7) is provided through the upper end plate (2) at the middle position of the top cover (5). A cooling liquid outlet pipe (8) is provided through the lower end end plate (2) at the middle position of the bottom cover (6). A liquid distributor (9) is provided inside the top cover (5) and on the outside of the cooling liquid inlet pipe (7). A gas distributor (10) is provided inside the bottom cover (6) and on the outside of the cooling liquid outlet pipe (8). A discharge pipe (11) is provided at the lower end of the bottom cover (6) and on both sides of the cooling liquid outlet pipe (8).

2. The cyanuric chloride chlorination separation coupled falling film reaction device according to claim 1, characterized in that: The top cover (5) and the bottom cover (6) are fixedly connected to the upper end plate (2) and the lower end plate (2) respectively by flanges. The side wall of the top cover (5) is provided with a liquid inlet (12) corresponding to the liquid distributor (9), and the side wall of the bottom cover (6) is provided with a gas inlet (13) corresponding to the gas distributor (10).

3. The cyanuric chloride chlorination separation coupled falling film reaction device according to claim 1, characterized in that: The lower end of the cooling inlet pipe (7) extends into the upper part of the tank body (1). The lower end side wall of the cooling inlet pipe (7) is provided with an outlet (14). The upper end of the cooling outlet pipe (8) is correspondingly arranged with the lower end end plate (2).

4. The cyanuric chloride chlorination separation coupled falling film reaction device according to claim 1, characterized in that: Both the liquid distributor (9) and the gas distributor (10) are annular tubular structures, and the lower walls of both the liquid distributor (9) and the gas distributor (10) are provided with distribution holes (15).

5. The cyanuric chloride chlorination separation coupled falling film reaction device according to claim 1, characterized in that: The inner cavity of the top cover (5) is connected to the inner cavity of the bottom cover (6) through the falling film tube (3).

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