Condensing device for recycling hydrogen peroxide

Abstract

The utility model discloses a condensing device for recycling hydrogen peroxide, which comprises a support, a condensing tank arranged on the support, a condensate circulating inlet arranged on the side wall of the lower end of the condensing tank, a condensate circulating outlet arranged on the side wall of the upper end of the condensing tank, a heat exchange coil arranged in the condensing tank, and a gas inlet arranged at the lower end of the heat exchange coil and connected with a gas inlet pipe. The upper end of the heat exchange coil is provided with a gas outlet and connected with a gas outlet pipe, a first pipe base is arranged at the top of the condensation tank and rotationally connected with the gas outlet pipe, a second pipe base is arranged at the bottom of the condensation tank and rotationally connected with a gas inlet pipe, and the gas inlet pipe is connected with an exhaust pipeline through a first gas rotating connector arranged at the top of the condensation tank. The gas outlet pipe is connected with the gas supply pipeline through a second gas rotating connector arranged at the bottom of the condensation tank, a motor is arranged at the bottom of the condensation tank, and an output shaft of the motor extends upwards and extends into the condensation tank. The hydrogen peroxide condensing and recycling device is high in hydrogen peroxide condensing and recycling efficiency, low in recycling cost and good in condensing pipe anti-blocking effect.

Description

Technical Field

[0001] The utility model relates to the technical field of tert-butyl hydroperoxide production equipment, in particular to a condensation device for recovering hydrogen peroxide. Background Technique

[0002] TBHP is one of the most commonly used initiators for free radical reactions, characterized by good thermal stability, safe to use, easy to control. Below 50°C, its activity shows no obvious change within three months, and there is no need for expensive refrigerated storage. It can be used in fields such as emulsion polymerization, aqueous phase polymerization, curing, and graft polymerization, and its performance is superior to that of persulfates, cumene hydroperoxide, and benzoyl peroxide in many aspects. The decomposition products of TBHP are mainly tert-butanol and a small amount of acetone, etc., without corrosion, and have low requirements for equipment. Most other initiators will form acidic by-products.

[0003] At present, in the preparation process of tert-butyl hydroperoxide, using tert-butanol as the basic raw material, after raising the temperature of the reaction kettle to a certain temperature, hydrogen peroxide is added to obtain the product tert-butyl alcohol oxide. During the preparation process of tert-butyl hydroperoxide crude product, due to the volatility of hydrogen peroxide, the exhaust gas produced contains a large amount of hydrogen peroxide. Direct discharge causes waste of resources. Generally, a condenser is used for condensation recovery, and a coolant is used to achieve efficient condensation. Such equipment is often huge in size and expensive. For traditional equipment that uses circulating water for condensation, since the position between the condenser tube and cold water cannot be changed at all times, the temperature near the condenser tube is relatively high, resulting in poor condensation effect, low practicality, and during the shutdown and idle process of the condenser tube, the condensate is not discharged in time and is prone to frosting and blockage. Content of the Utility Model

[0004] The utility model provides a condensation device for recovering hydrogen peroxide, which solves the problems of low recovery efficiency, high recovery cost, and easy frosting and blockage of the condenser tube in the traditional tert-butyl hydroperoxide production process for recovering hydrogen peroxide from exhaust gas.

[0005] The utility model provides a condensation device for recovering hydrogen peroxide. A condensation device for recovering hydrogen peroxide includes a bracket, on which a condensation tank is arranged. A condensate liquid circulation inlet is arranged on the side wall at the lower end of the condensation tank, and a condensate liquid circulation outlet is arranged on the side wall at the upper end. A heat exchange coil is arranged inside the condensation tank. A gas inlet is arranged at the lower end of the heat exchange coil and is connected to an inlet pipe, and the upper end of the heat exchange coil is set as a gas outlet and is connected to an outlet pipe. A first pipe seat is arranged at the top of the condensation tank, and the first pipe seat is rotatably connected to the outlet pipe. A second pipe seat is arranged at the bottom of the condensation tank, and the second pipe seat is rotatably connected to the inlet pipe. The outlet pipe is connected to an exhaust pipe through a first gas rotary joint arranged at the top of the condensation tank, and the inlet pipe is connected to a gas supply pipe through a second gas rotary joint arranged at the bottom of the condensation tank. A motor is arranged at the bottom of the condensation tank, and the output shaft of the motor extends upward and extends into the condensation tank. A first gear is coaxially arranged at the end of the output shaft of the motor extending into the condensation tank, and a second gear that can be meshed with the first gear is coaxially arranged on the inlet pipe on one side of the first gear.

[0006] In the above technical solution, further, a horizontal annular spray pipe is arranged at the top of the condensation tank. The annular spray pipe is hoisted and fixed on the top of the condensation tank through pipe clamps. An inlet is arranged at the top of the annular spray pipe and is connected to a water supply pipe, and a plurality of outlets are arranged at the bottom of the spray pipe, and a nozzle is arranged at each outlet.

[0007] In the above technical solution, further, a rotating disc is coaxially arranged on the inlet pipe, and a plurality of centrifugal blades are arranged on the rotating disc along the circumferential direction.

[0008] In the above technical solution, further, a plurality of through holes are arranged on the surface of the rotating disc in a circumferential array.

[0009] In the above technical solution, further, the motor is a servo motor.

[0010] In the above technical solution, further, a plurality of vertical columns are arranged on the rotating disc along the circumferential direction, and a plurality of stirring blades are arranged on the side wall of each column.

[0011] It can be seen from the above technical solutions that the utility model provides a condensation device for recovering hydrogen peroxide.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The output shaft of the motor is driven to rotate to drive the first gear and the second gear to mesh and drive, driving the inlet pipe and the heat exchange coil to rotate. During the rotation process, the position is changed with the condensed water in the condensation tank for heat exchange at different positions. The heat exchange efficiency is high, accelerating the condensation speed of hydrogen peroxide. The condensed hydrogen peroxide flows downward and out of the heat exchange coil for collection under the guidance of the heat exchange coil. The hydrogen peroxide recovery efficiency is high;

[0014] 2. Supply hot water into the annular spray pipe through the water supply pipe. When frosting occurs in the annular spray pipe, spray downward onto the heat exchange coil through the nozzles, which can quickly melt the frost condensed in the heat exchange coil, prevent the heat exchange coil from being blocked for a long time, and has a good anti-blocking effect.

[0015] 3. During the rotation of the rotating disk driven by the motor, the centrifugal blades and the stirring blades on the column can be driven to rotate and stir the condensed liquid in the condensation tank, so that the condensed liquid in the condensation tank can be fully utilized before recycling. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the implementation cases will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative labor.

[0017] Figure 1 It is a schematic diagram of the overall structure of a condensation device for recovering hydrogen peroxide proposed by the present invention;

[0018] Figure 2 It is a schematic cross-sectional structure diagram of a condensation device for recovering hydrogen peroxide proposed by the present invention;

[0019] Figure 3 It is a schematic diagram of the rotating disk structure of a condensation device for recovering hydrogen peroxide proposed by the present invention;

[0020] Figure 4 It is a schematic diagram of the installation structure of the stirring blades of a condensation device for recovering hydrogen peroxide proposed by the present invention;

[0021] Figure 5 It is a schematic cross-sectional structure diagram of the first pipe seat of a condensation device for recovering hydrogen peroxide proposed by the present invention.

[0022] In the figure:

[0023] 1 - Bracket;

[0024] 2 - Condensation tank; 21 - Condensed liquid circulation inlet; 22 - Condensed liquid circulation outlet;

[0025] 3 - Heat exchange coil; 31 - Inlet gas pipe; 32 - Outlet gas pipe; 33 - First pipe seat; 34 - Second pipe seat; 35 - First gas rotary joint; 36 - Exhaust pipe; 37 - Second gas rotary joint; 38 - Gas supply pipe; 301 - Axial through hole; 302 - Bearing; 303 - Oil seal;

[0026] 4 - Motor; 41 - First gear; 42 - Second gear;

[0027] 5 - Annular spray pipe; 51 - Pipe clamp; 52 - Water supply pipe; 53 - Nozzle;

[0028] 6 - Rotating disk; 60 - Through hole; 61 - Centrifugal blade; 62 - Column; 63 - Stirring blade. Detailed implementation manner

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings.

[0030] Embodiment 1:

[0031] Refer to Figures 1-5 , a condensation device for recovering hydrogen peroxide, comprising a bracket 1, a condensation tank 2 is arranged on the bracket 1, the condensation tank 2 is a closed tank structure, a condensate circulation inlet 21 is arranged on the side wall of the lower end of the condensation tank 2, and a condensate circulation outlet 22 is arranged on the side wall of the upper end. The condensate circulation inlet 21 is connected to a condensate storage tank through a pipeline. The condensate in the condensate storage tank is ice brine. A vertically arranged heat exchange coil 3 is arranged in the condensation tank 2. A gas inlet is arranged at the lower end of the heat exchange coil 3 and is connected to an inlet pipe 31. The upper end of the heat exchange coil 3 is set as a gas outlet and is connected to an outlet pipe 32. A first pipe seat 33 is fixedly arranged at the middle position of the top of the condensation tank 2, and the first pipe seat 33 is rotatably connected to the outlet pipe 32. A second pipe seat 34 is fixedly arranged at the middle position of the bottom of the condensation tank 2, and the second pipe seat 34 is rotatably connected to the inlet pipe 31. The outlet pipe 32 is connected to an exhaust pipeline 36 through a first gas rotary joint 35 arranged at the top of the condensation tank 2. The inlet pipe 31 is connected to a gas supply pipeline 38 through a second gas rotary joint 37 arranged at the bottom of the condensation tank 2. A motor 4 is arranged at the bottom of the condensation tank 2. The output shaft of the motor 4 extends upward and extends into the condensation tank 2. A first gear 41 is coaxially arranged at the extending end of the output shaft of the motor 4. A second gear 42 that can be meshed with the first gear 41 is coaxially arranged on the inlet pipe 31 on one side of the first gear 41. By driving the output shaft of the motor 4 to rotate, the first gear 41 is driven to rotate. The first gear 41 rotates and meshes with the second gear 42 for transmission, driving the inlet pipe 31 to rotate. The rotation of the inlet pipe 31 drives the heat exchange coil 3 to rotate. During the rotation process, heat exchange occurs with the condensate in the condensation tank 2 at different positions. The heat exchange efficiency is high, accelerating the condensation speed of hydrogen peroxide. The hydrogen peroxide condensed into liquid flows downward and back out of the heat exchange coil 3 under the guidance of the heat exchange coil 3 for collection, and the hydrogen peroxide recovery efficiency is high.

[0032] In this embodiment, refer to Figure 2, a horizontal annular spray pipe 5 is arranged at the top of the condensation tank 2. The annular spray pipe 5 is hoisted and fixed at the top of the condensation tank 2 through a pipe clamp 51. The top of the annular spray pipe 5 is provided with a water inlet and is connected to a water supply pipe 52. A plurality of water outlets are arranged at the bottom of the spray pipe 5, and each water outlet is provided with a nozzle 53. Hot water is supplied into the annular spray pipe 5 through the water supply pipe 52. When frosting occurs in the annular spray pipe 5, the hot water in the annular spray pipe 5 is sprayed downward through the nozzles 53 to align with the heat exchange coil 3, which can increase the temperature of the heat exchange coil 3 and quickly melt the frost condensed in the heat exchange coil 3, preventing the heat exchange coil 3 from being blocked for a long time, and having a good anti-blocking effect.

[0033] In this embodiment, refer to Figure 4 , a rotating disk 6 is coaxially arranged on the air inlet pipe 31. A plurality of centrifugal blades 61 are arranged on the rotating disk 6 along the circumferential direction. When the air inlet pipe 31 is driven to rotate by the motor 4, the rotating disk 6 is driven to rotate. During the rotation of the rotating disk 6, the centrifugal blades 61 agitate the condensate in the condensation tank 2 to increase the temperature uniformity of the condensate in the condensation tank 2.

[0034] In this embodiment, the first gas rotary joint 35 and the second gas rotary joint 37 are both commercially available devices, and their function is to realize the rotary connection and gas transmission with the gas pipe.

[0035] In this embodiment, refer to Figure 5 , the first pipe seat 33 and the second pipe seat 34 have the same structure, both having a shaft-passing through hole 301. A bearing 302 is installed in the shaft-passing through hole 301. The gas pipe is arranged in the shaft-passing through hole 301 and is rotationally supported by the bearing 302. An oil seal 303 or a sealing ring is installed at the outer end of the shaft-passing through hole 301 to realize the sealing between the inside and outside of the condensation tank 2.

[0036] In this embodiment, refer to Figure 3 , a plurality of through holes 60 are arranged in a circumferential array on the surface of the rotating disk 6. When the condensate is supplied into the condensation tank 2 through the condensate circulation inlet 21, the condensate passes through the uniformly distributed through holes 60 on the rotating disk 6 and is evenly dispersed into the condensation tank 2, increasing the uniformity of the condensate circulation.

[0037] In this embodiment, the motor 4 is a servo motor. The output shaft of the motor 4 and the bottom plate of the condensation tank 2 are sealed through a rotary shaft seal or by installing a sealing ring in the shaft-passing hole, preventing the condensate in the condensation tank 2 from leaking through the shaft-passing hole. Through the motor 4, the heat exchange coil 3 can be driven to rotate clockwise to exchange heat with the condensate supplied in the condensation tank 2, and can also be driven to rotate counterclockwise to exchange heat with the condensate supplied in the condensation tank 2. By different rotation directions, the condensate after heat exchange is prevented from gathering together to reduce the heat exchange efficiency.

[0038] In this embodiment, refer to Figure 4, a plurality of vertically arranged columns 62 are arranged on the rotating disk 6 along the circumferential direction, and a plurality of stirring blades 63 are arranged on the side wall of each column 62. During the rotation of the rotating disk 6, the stirring blades 63 on the columns 62 can be driven to rotate to stir the liquid in the condensation tank 2, so that the condensed liquid in the condensation tank 2 can be fully utilized before recycling, and the utilization rate of the condensed liquid is high.

[0039] As can be seen from the above technical solutions, during use, first, condensed liquid is circulated and added into the condensation tank 2 through the condensed liquid circulation inlet 21 and the condensed liquid circulation outlet 22. Then, the air inlet pipe 31 is connected to the air supply pipe 38 through the second gas rotary joint 37 arranged at the bottom of the condensation tank 2 to supply air to the heat exchange coil 3, and the air outlet pipe 32 is connected to the exhaust pipe 36 through the first gas rotary joint 35 arranged at the top of the condensation tank 2 to discharge other gases in the heat exchange coil 3. The hydrogen peroxide entering the heat exchange coil 3 condenses into a liquid and flows back into the air supply pipe 38 for recovery. During the condensation process, the controller controls the motor 4 to drive the rotation of its output shaft, driving the first gear 41 to rotate. The rotation of the first gear 41 meshes with and drives the second gear 42 to rotate, driving the air inlet pipe 31 to rotate. The rotation of the air inlet pipe 31 drives the heat exchange coil 3 to rotate. During the rotation, heat exchange occurs with the condensed water in the condensation tank 2 at different positions. At the same time, during the rotation of the rotating disk 6, the stirring blades 63 on the columns 62 can be driven to rotate to stir the condensed liquid in the condensation tank 2, so that the condensed liquid in the condensation tank 2 can be fully utilized before recycling.

[0040] After considering the specification and practicing the disclosed utility model herein, those skilled in the art will readily conceive of other embodiments of the present utility model. The present utility model is intended to cover any variations, uses, or adaptations of the present utility model that follow the general principles of the present utility model and include the common general knowledge or conventional technical means in the technical field not disclosed in the present utility model. The specification and embodiments are only regarded as exemplary, and the true scope of the present utility model is pointed out by the claims.

[0041] It should be understood that the present utility model is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present utility model do not constitute a limitation on the protection scope of the present utility model.

Claims

1. A condensing device for recovering hydrogen peroxide, characterized in that: The invention comprises a support (1), a condensing tank (2) is arranged on the support (1), a condensing liquid circulation inlet (21) is arranged on the lower side wall of the condensing tank (2), and a condensing liquid circulation outlet (22) is arranged on the upper side wall, a heat exchange coil (3) is arranged in the condensing tank (2), a gas inlet is arranged at the lower end of the heat exchange coil (3) and is connected to an air inlet pipe (31), and a gas outlet is arranged at the upper end of the heat exchange coil (3) and is connected to an air outlet pipe (32), a first pipe seat (33) is arranged at the top of the condensing tank (2), and the first pipe seat (33) is rotatably connected to the air outlet pipe (32), and a second pipe seat (34) is arranged at the bottom of the condensing tank (2), and the second pipe seat (34) is rotatably connected to the air outlet pipe (32). The air inlet pipe (31) is rotatably connected, the air outlet pipe (32) is connected to the exhaust pipe (36) through a first gas rotary joint (35) arranged at the top of the condenser (2), the air inlet pipe (31) is connected to the air supply pipe (38) through a second gas rotary joint (37) arranged at the bottom of the condenser (2), a motor (4) is arranged at the bottom of the condenser (2), the output shaft of the motor (4) extends upward and extends into the condenser (2), a first gear (41) is coaxially arranged at the extension end of the output shaft of the motor (4), and a second gear (42) that can mesh with the first gear (41) is coaxially arranged on the air inlet pipe (31) on one side of the first gear (41).

2. A condensing device for recovering hydrogen peroxide according to claim 1, characterized in that: A horizontal annular spray pipe (5) is arranged on the top of the condensation tank (2); the annular spray pipe (5) is hoisted and fixed on the top of the condensation tank (2) through a pipe clamp (51); a water inlet is arranged on the top of the annular spray pipe (5) and is connected to a water supply pipe (52); a plurality of water outlets are arranged on the bottom of the spray pipe (5), and a spray head (53) is arranged on each water outlet.

3. A condensing device for recovering hydrogen peroxide according to claim 1, characterized in that: A rotating disk (6) is coaxially arranged on the air inlet pipe (31), and a plurality of centrifugal blades (61) are arranged on the rotating disk (6) along the circumferential direction.

4. A condensing device for recovering hydrogen peroxide according to claim 3, characterized in that: The surface of the rotating disk (6) has a plurality of through holes (60) distributed in a circumferential array.

5. A condensing device for recovering hydrogen peroxide according to claim 1, characterized in that: The motor (4) is a servo motor.

6. A condensing device for recovering hydrogen peroxide according to claim 4, characterized in that: A plurality of vertical columns (62) are arranged on the rotating disk (6) along the circumferential direction, and a plurality of stirring blades (63) are arranged on the side wall of each column (62).

Images