A sulfuric acid separation and recovery device

Abstract

The utility model relates to the technical field of waste sulfuric acid treatment, and specifically discloses a sulfuric acid separation and recovery device, including a still, a condensing device and a water storage tank, wherein a liquid inlet and a steam exhaust pipe are respectively provided on the end surface and the top surface of the still, an air inlet pipe is provided on the end surface of the condensing device, a transmission pipe for decelerating the steam is connected between the steam exhaust pipe and the air inlet pipe, a water collecting pipe is provided on the bottom surface of the condensing device, and the other end of the water collecting pipe is connected to the water storage tank, a vacuum pump is also provided on the end surface of the still, an air suction pipe is provided on the vacuum pump and extends into the still, and a stirring device is also provided on the bottom surface of the still. The utility model can effectively reduce the flow rate of high-temperature steam in the process of transmitting the high-temperature steam, thereby increasing the reaction time of the high-temperature steam in the condensing device and improving the use efficiency of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of waste sulfuric acid treatment, in particular to a sulfuric acid separation and recovery device. Background Art

[0002] In chemical production, a large amount of waste sulfuric acid is generated. One of the existing methods for treating waste sulfuric acid is to perform low-temperature evaporation and concentration on it. Low-temperature evaporation and concentration is a common material concentration method. The solvent in the solution is evaporated in a distillation kettle under a low-temperature environment to form high-temperature steam, which is then passed through a condensation device to form distilled water, thereby concentrating the solute in the distillation kettle.

[0003] Traditional low-temperature evaporation devices usually use a horizontal pipeline to transfer high-temperature steam to the condensing device. In this way, the steam flow rate is fast during the transfer process, so that it cannot fully react in the condensing device, reducing the efficiency of the device. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the high-temperature steam in the transmission process cannot flow slowly in the condensing device, which reduces the reaction time of the high-temperature steam inside the condensing device and causes the use efficiency of the device to be reduced.

[0005] In order to solve the above problems, the technical solution of the utility model is as follows: a sulfuric acid separation and recovery device, comprising a distillation kettle, a condensation device and a water storage tank, wherein a liquid inlet and a steam discharge pipe are respectively provided on the end surface and the top surface of the distillation kettle, an air inlet pipe is provided on the end surface of the condensation device, a transmission pipe for decelerating the steam is connected between the steam discharge pipe and the air inlet pipe, a water collecting pipe is provided on the bottom surface of the condensation device, and the other end of the water collecting pipe is connected to the water storage tank;

[0006] A vacuum pump is also provided on the end surface of the distillation kettle. A suction pipe is provided on the vacuum pump and extends into the distillation kettle. A stirring device is also provided on the bottom surface of the distillation kettle.

[0007] Furthermore, the transmission pipe is a pipe with a spiral line structure.

[0008] Furthermore, the conveying pipe is a second pipeline with a continuous U-shaped structure.

[0009] Furthermore, the stirring device includes a stirring shaft, stirring rod 1 and stirring rod 2. A rotatable stirring shaft is passed through the central position of the bottom surface of the distillation kettle. Stirring rods 1 parallel to the stirring rod 1 are fixedly provided on both sides of the stirring rod 1 close to the bottom wall of the distillation kettle. A plurality of groups of stirring rods 2 are also equidistantly provided on both sides of the stirring shaft above the stirring rod 1 along the axial direction thereof, and the bottom end of the stirring shaft is fixedly connected to the output shaft of the motor.

[0010] Furthermore, a concentrated liquid discharge pipe is provided on the bottom surface of the distillation kettle.

[0011] Furthermore, a drain pipe is provided on the end surface of the water storage tank.

[0012] The advantages of the utility model compared with the existing technology are:

[0013] By setting up the spiral line structure pipeline one or the continuous U-shaped structure pipeline two, the shape characteristics of pipeline one or pipeline two can be used to reduce the flow rate of the high-temperature steam during the transmission of the high-temperature steam to the condensing device, so that the high-temperature steam can have a longer time to fully react in the condensing device, thereby improving the use efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the first embodiment of the present utility model.

[0015] Figure 2 It is a structural diagram of the second embodiment of the present utility model.

[0016] Figure 3 It is a partial internal structure diagram of the distillation kettle of the utility model.

[0017] As shown in the figure: 1. Distillation kettle; 2. Support legs; 3. Liquid inlet; 4. Steam discharge pipe; 5. Pipeline one; 6. Air inlet pipe; 7. Condensation device; 8. Water collecting pipe; 9. Water storage tank; 10. Drain pipe; 11. Vacuum pump; 12. Intake pipe; 13. Pipeline two; 14. Stirring shaft; 15. Stirring rod one; 16. Stirring rod two; 17. Motor; 18. Concentrate discharge pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] Embodiment 1

[0020] like Figure 1As shown, a sulfuric acid separation and recovery device comprises a still 1, a condensing device 7 and a water storage tank 9, the outside of the still 1 is connected by a supporting leg 2, a liquid inlet 3 and a steam exhaust pipe 4 are respectively provided on the end surface and the top surface of the still 1, an air inlet pipe 6 is provided on the end surface of the condensing device 7, the above features belong to the prior art, a transmission pipe for decelerating the steam is connected between the steam exhaust pipe 4 and the air inlet pipe 6, so that the high-temperature steam can have a longer reaction time in the condensing device, thereby improving the use efficiency of the device, a water collecting pipe 8 is provided on the bottom surface of the condensing device 7, the other end of the water collecting pipe 8 is connected to the water storage tank 9, and a drain pipe 10 is also provided on the end surface of the water storage tank 9;

[0021] A vacuum pump 11 is also provided on the end surface of the distillation kettle 1 . A suction pipe 12 is provided on the vacuum pump 11 and extends into the distillation kettle 1 . A stirring device is also provided on the bottom surface of the distillation kettle 1 .

[0022] like Figure 1 As shown, the conveying pipe is a pipe 1 5 with a spiral line structure. The spiral line structure of the pipe 1 5 can reduce the conveying flow rate of the high-temperature steam.

[0023] like Figure 3 As shown, the stirring device includes a stirring shaft 14, a stirring rod 15 and a stirring rod 2 16. A rotatable stirring shaft 14 is passed through the central position of the bottom surface of the distillation kettle 1. Stirring rods 15 parallel to the stirring rod 1 are fixed on both sides of the stirring rod 15 close to the bottom wall of the distillation kettle 1. A plurality of groups of stirring rods 2 16 are equidistantly arranged on both sides of the stirring shaft 14 above the stirring rod 15 along the axial direction thereof, and the bottom end of the stirring shaft 14 is fixedly connected to the output shaft of the motor 17. When the motor 17 is started, the stirring shaft 14, the stirring rod 15 and the stirring rod 2 16 are driven to rotate, so that the waste sulfuric acid is evenly stirred, and the moisture in the waste sulfuric acid can be quickly distilled.

[0024] like Figure 1 As shown, a concentrated liquid discharge pipe 18 is also provided on the bottom surface of the distillation kettle 1, and the concentrated liquid after distillation in the waste sulfuric acid is discharged through the discharge pipe 18.

[0025] Embodiment 2

[0026] Based on the first embodiment, Figure 2 As shown, the specific structure of the transmission pipe is as follows

[0027] The conveying pipe is a pipeline 2 13 with a continuous U-shaped structure. Through the continuous U-shaped structure of the pipeline 2 13, the high-temperature steam in the conveying process can be decelerated.

[0028] In specific use, firstly, waste sulfuric acid is injected into the distillation kettle 1 from the liquid inlet 3, then, the vacuum pump 11 is started to evacuate the distillation kettle 1, and then the distillation kettle 1 is heated to perform low-temperature distillation of the waste sulfuric acid under vacuum, and then the formed high-temperature steam is transmitted to the condensing device through the steam discharge pipe 4, the transmission pipe and the air inlet pipe 6, so that the high-temperature steam forms distilled water, which is collected into the water storage tank 9 through the water collecting pipe 8;

[0029] In the process of transmitting the high-temperature steam, under the action of the spiral line structure pipeline 1 5 or the continuous U-shaped structure pipeline 2 13, the shape characteristics of the pipeline 1 5 or the pipeline 2 13 can be used to reduce the flow rate of the high-temperature steam in the process of transmitting the high-temperature steam to the condensing device, so that the high-temperature steam can have a longer time to fully react in the condensing device, thereby improving the use efficiency of the device.

[0030] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A sulfuric acid separation and recovery device, comprising a still (1), a condensing device (7) and a water storage tank (9), wherein a liquid inlet (3) and a steam discharge pipe (4) are respectively provided on the end surface and the top surface of the still (1), and an air inlet pipe (6) is provided on the end surface of the condensing device (7), characterized in that: A transmission pipe for decelerating the steam is connected between the steam discharge pipe (4) and the air intake pipe (6); a water collecting pipe (8) is provided on the bottom surface of the condensing device (7); and the other end of the water collecting pipe (8) is connected to a water storage tank (9); A vacuum pump (11) is also provided on the end surface of the distillation kettle (1), an air intake pipe (12) is provided on the vacuum pump (11) and extends into the distillation kettle (1), and a stirring device is also provided on the bottom surface of the distillation kettle (1).

2. A sulfuric acid separation and recovery device according to claim 1, characterized in that: The transmission pipe is a pipe 1 (5) with a spiral line structure.

3. A sulfuric acid separation and recovery device according to claim 1, characterized in that: The conveying pipe is a second pipe (13) with a continuous U-shaped structure.

4. A sulfuric acid separation and recovery device according to any one of claims 1 to 3, characterized in that: The stirring device comprises a stirring shaft (14), a stirring rod one (15) and a stirring rod two (16); a rotatable stirring shaft (14) is inserted through the central position of the bottom surface of the distillation kettle (1); stirring rods one (15) parallel to the stirring rod one (15) are fixedly arranged on both sides of the stirring rod one (15) close to the bottom wall of the distillation kettle (1); a plurality of groups of stirring rods two (16) are equidistantly arranged on both sides of the stirring shaft (14) above the stirring rod one (15) along the axial direction thereof; and the bottom end of the stirring shaft (14) is fixedly connected to the output shaft of the motor (17).

5. A sulfuric acid separation and recovery device according to claim 1, characterized in that: A concentrated liquid discharge pipe (18) is also provided on the bottom surface of the distillation kettle (1).

6. A sulfuric acid separation and recovery device according to claim 1, characterized in that: A drainage pipe (10) is also provided on the end surface of the water storage tank (9).

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