Condensation recovery device for benzotriazole

Abstract

The utility model relates to a condensation recovery device for benzotriazole. The condensation recovery device comprises a rectangular liquefaction cabin and a main body arranged in the rectangular liquefaction cabin, the openings in the front side and the rear side of the rectangular liquefaction cabin are each provided with an isosceles trapezoid flowing cabin in an outward mode, the openings in the ends of the two isosceles trapezoid flowing cabins are each provided with a rectangular air pipe cabin in an outward mode, and the bottom of the isosceles trapezoid flowing cabin on the front side is arranged in a front-high-back-low mode; a coil cooler is further fixed in the opening of the end of the rectangular air pipe cabin on the front side, and a fan is further fixed to an air outlet of the coil cooler. A flow guide mechanism and a cooling assembly which are matched with each other are further arranged in the isosceles trapezoid flow cabin on the front side. According to the utility model, the cooling amplitude of benzotriazole steam is obviously increased, and the condensation effect is effectively improved, so that the production time is shortened, and the recovery efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a condensation recovery device for benzotriazole. Background Art

[0002] The process of preparing benzotriazole by the 1-hydroxybenzotriazole method has a high yield, so it is currently relatively commonly used in the industry; during preparation, o-nitrochlorobenzene is first reacted with hydrazine hydrate to obtain 1-hydroxybenzotriazole, and then hydrazine hydrate is used in combination with azeotropic distillation of alcohol-water-hydrazine to recover benzotriazole. Benzotriazole exists in a gaseous state after the distillation process, so it must be condensed to obtain liquid benzotriazole.

[0003] Existing condensation equipment for recovering benzotriazole only performs single-stage cooling, resulting in a small temperature drop of benzotriazole vapor. At the same time, due to the insufficient and ineffective contact between benzotriazole vapor and the condenser, the condensation effect is poor, and continuous recovery can only be achieved through long-term cyclic condensation. However, this increases the production time and the recovery efficiency is low, which needs to be further improved. Summary of the Utility Model

[0004] Aiming at the current situation of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a condensation recovery device for benzotriazole that has a three-stage cooling process to significantly increase the temperature drop of benzotriazole vapor, thereby effectively improving the condensation effect, reducing the production time, and improving the recovery efficiency.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows: A condensation recovery device for benzotriazole, characterized in that it includes a rectangular liquefaction chamber and a main body arranged inside the rectangular liquefaction chamber;

[0006] Isosceles trapezoidal flow chambers are formed outward at the openings on the front and rear sides of the rectangular liquefaction chamber. Rectangular air duct chambers are formed outward at the end openings of the two isosceles trapezoidal flow chambers. The bottom of the isosceles trapezoidal flow chamber on the front side is set with the front end higher than the rear end;

[0007] A sealed and detachable cover plate is also fixed between the top openings of the rectangular liquefaction chamber, the two isosceles trapezoidal flow chambers, and the two rectangular air duct chambers;

[0008] A coil cooler is also fixed inside the end opening of the rectangular air duct chamber on the front side. A blower located inside the rectangular air duct chamber is also fixed inside the coil cooler. A guiding mechanism and a cooling component that cooperate with each other are also arranged inside the isosceles trapezoidal flow chamber on the front side;

[0009] The diversion mechanism includes a V-shaped flow splitter strip vertically fixed between the inner wall of the bottom of the isosceles trapezoidal flow chamber and the inner wall of the top of the cover plate and located inside the root opening of the isosceles trapezoidal flow chamber, and two flow splitter units symmetrically arranged on the left and right sides of the V-shaped flow splitter strip. The opening of the V-shaped flow splitter strip faces backward, and an isosceles trapezoidal diversion area is formed between the two flow splitter units;

[0010] The flow splitter unit includes a plurality of flow splitters vertically fixed between the inner wall of the bottom of the isosceles trapezoidal flow chamber and the inner wall of the top of the cover plate. Any one of the flow splitters in the left flow splitter unit is parallel to the left inner wall of the isosceles trapezoidal flow chamber, and any one of the flow splitters in the right flow splitter unit is parallel to the right inner wall of the isosceles trapezoidal flow chamber. A flow diversion channel is formed between the flow splitter and the two adjacent flow splitters and between any two adjacent flow splitters;

[0011] The cooling assembly includes a plurality of cooling units arranged in sequence from front to back. The cooling unit includes two cooling branch pipes vertically arranged and respectively located outside the left and right sides of the isosceles trapezoidal flow chamber, and a plurality of cooling straight pipes horizontally arranged and distributed in sequence from top to bottom; Each cooling straight pipe is horizontally inserted and connected between the flow splitters at the corresponding positions in each flow splitter unit. The two ends of each cooling straight pipe respectively pass through the left and right sides of the isosceles trapezoidal flow chamber and are respectively inserted into the two cooling branch pipes;

[0012] The main body includes two condensation units arranged opposite to each other on the left and right. The condensation unit includes a liquid outlet pipe and a liquid inlet pipe horizontally arranged and respectively distributed up and down, and a plurality of serpentine coils arranged in sequence from front to back. The two ends of each serpentine coil are respectively inserted into the liquid outlet pipe and the liquid inlet pipe. The plurality of serpentine coils in the left condensation unit and the plurality of serpentine coils in the right condensation unit are respectively spaced apart from front to back.

[0013] Preferably, the transverse lengths of the plurality of flow splitters in each flow splitter unit increase sequentially from inside to outside. The rear edges of each flow splitter in the same flow splitter unit are located in the same vertical plane and are all located inside the root opening of the isosceles trapezoidal flow chamber.

[0014] Preferably, the cooling assembly further includes two cooling main pipes respectively arranged outside the left and right sides of the isosceles trapezoidal flow chamber. The lower end of each cooling branch pipe is inserted into a cooling main pipe on the same side, the upper end of each cooling branch pipe is closed, and one end of each cooling main pipe is closed.

[0015] Preferably, both ends of the liquid outlet pipe and both ends of the liquid inlet pipe are closed. A first interface pipe is also inserted into the upper side of the middle part of the liquid outlet pipe, and a second interface pipe is inserted into the lower side of the middle part of the liquid inlet pipe. The opening at the end of the first interface pipe penetrates through the cover plate upward in a sealed manner and extends above the cover plate, and the opening at the end of the second interface pipe penetrates through the bottom of the rectangular liquefaction tank upward in a sealed manner and extends below the rectangular liquefaction tank.

[0016] Preferably, a chemical addition pipe is inserted into the left or right side of the root of one of the rectangular air duct tanks on the front side. The chemical addition pipe is arranged above the inside of the opening at the root of the rectangular air duct tank. A plurality of chemical addition holes are arranged on the lower side of the chemical addition pipe in sequence along the length direction of the chemical addition pipe, and the inner end of the chemical addition pipe is closed.

[0017] Preferably, a funnel part is formed downward at the bottom of the rectangular liquefaction tank, and a discharge pipe is inserted into the bottom of the funnel part.

[0018] Preferably, a vertically arranged outer frame is fixed inside one of the rectangular air duct tanks on the front side. The upper side edge of the outer frame is flush with the top opening of the rectangular air duct tank. A detachable inner frame is fixed inside the outer frame, and a plurality of first guiding strips are fixed inside the inner frame and arranged in sequence from top to bottom. Each first guiding strip is arranged with the front end lower and the rear end higher and is located between the fan and the chemical addition pipe.

[0019] Preferably, a vertically arranged baffle is fixed inside the rear opening of the rectangular liquefaction tank. The upper side edge of the baffle is flush with the top opening of the rectangular liquefaction tank. A cavity hole is formed in the baffle, and a plurality of second guiding strips are fixed in the cavity hole and arranged in sequence from top to bottom. Each second guiding strip is arranged with the front end higher and the rear end lower.

[0020] Compared with the prior art, the advantages of the present utility model are as follows: The present utility model has a three-stage cooling process, and at the same time, the benzotriazole vapor is shunted by means of a diversion mechanism, so that the benzotriazole vapor can come into full and effective contact with the cooling component and the main body in sequence to achieve sufficient heat exchange, thereby significantly increasing the temperature reduction range of the benzotriazole vapor, effectively improving the condensation effect, reducing the production time, and improving the recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a left front top view exploded structure diagram of the present utility model;

[0022] Figure 2 is a left front bottom view structure diagram of the present utility model;

[0023] Figure 3 is a left front top view structure diagram of the main body of the present utility model. DETAILED DESCRIPTION OF THE INVENTION

[0024] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the ordinary meanings understood by those with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar terms used in this utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0025] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted in this utility model.

[0026] As Figures 1 to 3 shown, a condensation recovery device for benzotriazole includes a rectangular liquefaction chamber 1 and a main body 6 disposed inside the rectangular liquefaction chamber 1;

[0027] At both the front and rear openings of the rectangular liquefaction chamber 1, an isosceles trapezoidal flow chamber 101 is formed outward. At the end openings of the two isosceles trapezoidal flow chambers 101, a rectangular air duct chamber 102 is formed outward. The bottom of the front isosceles trapezoidal flow chamber 101 is set with the front higher than the rear.

[0028] A sealed and detachable cover plate 2 is also fixed between the top openings of the rectangular liquefaction chamber 1, the two isosceles trapezoidal flow chambers 101, and the two rectangular air duct chambers 102.

[0029] Inside the end opening of the front rectangular air duct chamber 102, a coil cooler 3 is also fixed. Inside the coil cooler 3, a blower 4 located inside the rectangular air duct chamber 102 is also fixed. Inside the front isosceles trapezoidal flow chamber 101, a guiding mechanism 5 and a cooling assembly 7 that cooperate with each other are also provided.

[0030] The guiding mechanism 5 includes a V-shaped flow dividing strip 52 vertically fixed between the inner wall of the bottom of the isosceles trapezoidal flow chamber 101 and the inner wall of the top of the cover plate 2 and located inside the root opening of the isosceles trapezoidal flow chamber 101, and two flow dividing plate units symmetrically disposed on the left and right sides of the V-shaped flow dividing strip 52. The opening of the V-shaped flow dividing strip 52 faces backward, and an isosceles trapezoidal flow dividing area 53 is formed between the two flow dividing plate units.

[0031] The flow splitter unit includes a plurality of flow splitters 51 vertically fixed between the inner wall of the bottom of the isosceles trapezoidal flow chamber 101 and the inner wall of the top of the cover plate 2. Any one of the flow splitters 51 in the left flow splitter unit is parallel to the left inner wall of the isosceles trapezoidal flow chamber 101, and any one of the flow splitters 51 in the right flow splitter unit is parallel to the right inner wall of the isosceles trapezoidal flow chamber 101. A flow channel 54 is formed between any two adjacent flow splitters 51 and between any two adjacent flow splitters 51;

[0032] The cooling assembly 7 includes a plurality of cooling units arranged in sequence from front to back. Each cooling unit includes two cooling branch pipes 72 vertically arranged and located outside the left and right sides of the isosceles trapezoidal flow chamber 101 respectively, and a plurality of cooling straight pipes 71 horizontally arranged and distributed in sequence from top to bottom; Each cooling straight pipe 71 is horizontally inserted and connected between the flow splitters 51 at the corresponding positions in each flow splitter unit. Both ends of each cooling straight pipe 71 pass through the left and right sides of the isosceles trapezoidal flow chamber 101 respectively and are inserted into the two cooling branch pipes 72;

[0033] The main body 6 includes two condensing units arranged opposite to each other left and right. Each condensing unit includes a liquid outlet pipe 61 and a liquid inlet pipe 62 horizontally arranged and distributed up and down respectively, and a plurality of serpentine coils 63 arranged in sequence from front to back. Both ends of each serpentine coil 63 are inserted into the liquid outlet pipe 61 and the liquid inlet pipe 62 respectively. The plurality of serpentine coils 63 in the left condensing unit and the plurality of serpentine coils 63 in the right condensing unit are spaced apart from each other front and back.

[0034] The transverse lengths of the plurality of flow splitters 51 in each flow splitter unit increase sequentially from inside to outside. The rear edges of each flow splitter 51 in the same flow splitter unit are located in the same vertical plane and are all located inside the root opening of the isosceles trapezoidal flow chamber 101.

[0035] The cooling assembly 7 further includes two cooling main pipes 73 respectively arranged outside the left and right sides of the isosceles trapezoidal flow chamber 101. The lower end of each cooling branch pipe 72 is inserted into a cooling main pipe 73 on the same side. The upper end of each cooling branch pipe 72 is closed, and one end of each cooling main pipe 73 is closed.

[0036] Both ends of the liquid outlet pipe 61 and both ends of the liquid inlet pipe 62 are closed. A first interface pipe 64 is also inserted on the upper side of the middle part of the liquid outlet pipe 61, and a second interface pipe 65 is also inserted on the lower side of the middle part of the liquid inlet pipe 62. The end opening of the first interface pipe 64 is hermetically passed through the cover plate 2 upward and extends above the cover plate 2. The end opening of the second interface pipe 65 is hermetically passed through the bottom of the rectangular liquefaction chamber 1 upward and extends below the rectangular liquefaction chamber 1.

[0037] A funnel part 103 is also formed downward at the bottom of the rectangular liquefaction chamber 1, and a discharge pipe 8 is inserted at the bottom of the funnel part 103.

[0038] On the left or right side of the root of a rectangular air duct cabin 102 at the front side, a chemical addition pipe 9 is also inserted. The chemical addition pipe 9 is arranged above the inside of the opening at the root of the rectangular air duct cabin 102. A plurality of chemical addition holes 91 are arranged on the lower side of the chemical addition pipe 9 in sequence along the length direction of the chemical addition pipe 9, and the inner end of the chemical addition pipe 9 is closed.

[0039] Inside a rectangular air duct cabin 102 at the front side, a vertically arranged outer frame 10 is also fixed. The upper side edge of the outer frame 10 is flush with the top opening of the rectangular air duct cabin 102. Inside the outer frame 10, a detachable inner frame 11 is also fixed. Inside the inner frame 11, a plurality of first guiding strips 12 arranged in sequence from top to bottom are also fixed. Each first guiding strip 12 is arranged with the front end lower and the rear end higher and is located between the fan 4 and the chemical addition pipe 9.

[0040] Inside the rear opening of the rectangular liquefaction cabin 1, a vertically arranged baffle 13 is also fixed. The upper side edge of the baffle 13 is flush with the top opening of the rectangular liquefaction cabin 1. A cavity hole 131 is formed in the baffle 13, and a plurality of second guiding strips 14 arranged in sequence from top to bottom are also fixed in the cavity hole 131. Each second guiding strip 14 is arranged with the front end higher and the rear end lower.

[0041] Working principle:

[0042] Connect the benzotriazole vapor to the end opening of a rectangular air duct cabin 102 at the front side through a pipeline and start the fan 4 to work so that the benzotriazole vapor quickly flows through the coil cooler 3 and enters the inside of a rectangular air duct cabin 102 at the front side, thus completing the first-stage cooling; subsequently, when the benzotriazole vapor passes through each slot formed between two adjacent first guiding strips 12, it will deflect obliquely upward to blow towards the chemical addition pipe 9. Then, add the coagulant aid into the chemical addition pipe 9 through the outer end of the chemical addition pipe 9, and further make the coagulant aid enter the inside of a rectangular air duct cabin 102 at the front side downward through a plurality of chemical addition holes 91, and then mix into the benzotriazole vapor.

[0043] Next, the benzotriazole vapor first enters the isosceles trapezoidal flow-distribution area 53 inside an isosceles trapezoidal flow chamber 101 located at the front side, and then enters each flow-distribution channel 54 to achieve flow distribution; the cooling medium is introduced into the above-mentioned cooling main pipe 73 through the open end of one of the cooling main pipes 73, and then enters a plurality of cooling straight pipes 71 through the cooling branch pipes 72 connected to the above-mentioned cooling main pipe 73 in each cooling unit, and thus converges into another cooling branch pipe 72 and flows out through the open end of another cooling main pipe 73 to achieve circulation; when the benzotriazole vapor flows through each flow-distribution channel 54, it will contact the outer wall of each cooling straight pipe 71, and thus is cooled for the second time, so that the second-stage cooling is completed while the flow is distributed. During this process, a part of the benzotriazole vapor will liquefy and then drip down to the bottom of the isosceles trapezoidal flow chamber 101, and thus flow into the bottom of the rectangular liquefaction chamber 1 along the slope of the bottom of the isosceles trapezoidal flow chamber 101;

[0044] Then, the benzotriazole vapor coming out of each flow-distribution channel 54 is blown towards the main body 6. The cooling medium is introduced into the liquid inlet pipe 62 through the second interface pipe 65 on the liquid inlet pipe 62 in one of the condensation units, and then flows through each serpentine coil 63 in the condensation unit simultaneously, and then converges into the liquid outlet pipe 61, and finally flows outwards through the first interface pipe 64 on the liquid outlet pipe 61 to achieve circulating flow. When it contacts the outer wall of each serpentine coil 63, the benzotriazole vapor will be cooled and liquefied and transformed into liquid benzotriazole, and then converges into the funnel part 103 and is discharged and collected through the discharge pipe 8.

[0045] A small amount of benzotriazole vapor that still has not liquefied continues to flow backward and flows through each notch formed between two adjacent second guiding strips 14, and thus the flowing direction deflects obliquely downward, and thus is discharged outwards through a rectangular air duct chamber 102 at the rear side, and then can re-enter a rectangular air duct chamber 102 at the front side again to continue condensation.

[0046] The utility model has a three-stage cooling process, and at the same time, the benzotriazole vapor is flow-distributed by means of the flow-guiding mechanism 5, and thus the benzotriazole vapor can contact the cooling assembly 7 and the main body 6 comprehensively and effectively in sequence to achieve sufficient heat exchange, and thus significantly increases the temperature reduction range of the benzotriazole vapor, and further effectively improves the condensation effect, and thus reduces the production time to improve the recovery efficiency.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A condensation recovery device for benzotriazole, characterized in that: It includes a rectangular liquefaction tank and a main body disposed inside the rectangular liquefaction tank; At both the front and rear openings of the rectangular liquefaction tank, an isosceles trapezoidal flow tank is formed outward. At the end openings of the two isosceles trapezoidal flow tanks, a rectangular air duct tank is formed outward. The bottom of the isosceles trapezoidal flow tank at the front side is set with the front end higher and the rear end lower; A sealed and detachable cover plate is also fixed between the top openings of the rectangular liquefaction tank, the two isosceles trapezoidal flow tanks, and the two rectangular air duct tanks; Inside the end opening of the rectangular air duct tank at the front side, a coil cooler is also fixed. Inside the coil cooler, a blower located inside the rectangular air duct tank is also fixed. Inside the isosceles trapezoidal flow tank at the front side, a guiding mechanism and a cooling component are also provided and cooperate with each other; The guiding mechanism includes a V-shaped shunt strip vertically fixed between the inner wall of the bottom of the isosceles trapezoidal flow tank and the inner wall of the top of the cover plate and located inside the root opening of the isosceles trapezoidal flow tank, and two shunt plate units symmetrically arranged on the left and right sides of the V-shaped shunt strip. The opening of the V-shaped shunt strip faces backward, and an isosceles trapezoidal shunt area is formed between the two shunt plate units; The shunt plate unit includes a plurality of shunt plates vertically fixed between the inner wall of the bottom of the isosceles trapezoidal flow tank and the inner wall of the top of the cover plate. Any one of the shunt plates in the left shunt plate unit is parallel to the left inner wall of the isosceles trapezoidal flow tank, and any one of the shunt plates in the right shunt plate unit is parallel to the right inner wall of the isosceles trapezoidal flow tank. A shunt channel is formed between the shunt plate and the two adjacent shunt plates and between any two adjacent shunt plates; The cooling component includes a plurality of cooling units arranged in sequence from front to back. The cooling unit includes two cooling branch pipes vertically arranged and respectively located outside the left and right sides of the isosceles trapezoidal flow tank, and a plurality of cooling straight pipes horizontally arranged and distributed in sequence from top to bottom; Each cooling straight pipe is horizontally inserted and connected between the shunt plates at the corresponding positions in each shunt plate unit. The two ends of each cooling straight pipe respectively pass through the left and right sides of the isosceles trapezoidal flow tank and are respectively inserted into the two cooling branch pipes; The main body includes two condensation units arranged oppositely left and right. The condensation unit includes a liquid outlet pipe and a liquid inlet pipe horizontally arranged and respectively distributed up and down, and a plurality of serpentine coils arranged in sequence from front to back. The two ends of each serpentine coil are respectively inserted into the liquid outlet pipe and the liquid inlet pipe. The plurality of serpentine coils in the left condensation unit and the plurality of serpentine coils in the right condensation unit are respectively spaced front and back; 2. The condensation recovery device for benzotriazole according to claim 1, wherein The horizontal lengths of the plurality of shunt plates in each shunt plate unit increase sequentially from inside to outside. The rear edges of each shunt plate in the same shunt plate unit are located in the same vertical plane and are all located inside the root opening of the isosceles trapezoidal flow tank.

3. The condensation recovery device for benzotriazole according to claim 1, characterized in that, The cooling component also includes two cooling main pipes respectively arranged outside the left and right sides of the isosceles trapezoidal flow tank. The lower end of each cooling branch pipe is inserted into a cooling main pipe on the same side. The upper end of each cooling branch pipe is closed, and one end of each cooling main pipe is closed.

4. A condensation recovery device for benzotriazole according to claim 1, characterized in that, Both ends of the liquid outlet pipe and both ends of the liquid inlet pipe are closed, and a first interface pipe is connected to the upper middle side of the liquid outlet pipe, and a second interface pipe is connected to the lower middle side of the liquid inlet pipe. The end opening of the first interface pipe is sealed upward through the cover plate and extends above the cover plate, and the end opening of the second interface pipe is sealed upward through the bottom of the rectangular liquefied tank and extends to the bottom of the rectangular liquefied tank.

5. The condensation recovery device for benzotriazole according to claim 1, characterized in that: A dosing tube is also connected to the left or right side of the root of one of the rectangular duct cabins on the front side. The dosing tube is arranged above the inner part of the opening at the root of the rectangular duct cabin. The lower side of the dosing tube is provided with multiple dosing holes distributed in sequence along the length direction of the dosing tube, and the inner end of the dosing tube is closed.

6. The condensation recovery device for benzotriazole according to claim 1, characterized in that: A funnel portion is formed downward at the bottom of the rectangular liquefaction tank, and a discharge pipe is plugged into the bottom of the funnel portion.

7. A condensation recovery device for benzotriazole according to claim 1, characterized in that, A vertically arranged outer frame is fixed to the interior of one of the rectangular duct cabins on the front side, and the upper edge of the outer frame is flush with the top opening of the rectangular duct cabin. A detachable inner frame is also fixed to the interior of the outer frame, and a plurality of first guide strips arranged in sequence from top to bottom are fixed to the interior of the inner frame. Each of the first guide strips is arranged low in the front and high in the back and is located between the fan and the dosing pipe.

8. A condensation recovery device for benzotriazole according to claim 1, characterized in that, A vertically arranged baffle is also fixed inside the rear opening of the rectangular liquefied tank, and the upper edge of the baffle is flush with the top opening of the rectangular liquefied tank. A cavity is opened in the baffle, and a plurality of second guide strips arranged in sequence from top to bottom are fixed in the cavity, and each of the second guide strips is arranged higher in the front and lower in the back.

Images