A wastewater circulating distillation tower

Abstract

This utility model discloses a wastewater circulating distillation tower, comprising a circulating distillation tower body, a feed preheating tank, and a condenser. The feed preheating tank is characterized in that one end is connected to the circulating distillation tower body via a preheated material conveying pipe; the top of the circulating distillation tower body is connected to the condenser via a gas guide pipe; the condenser has a circulating water inlet and a circulating water outlet; a heat exchange device is installed between the feed preheating tank and the condenser; the heat exchange device is connected to the condenser via the circulating water inlet and outlet; the heat exchange device includes an outer casing and an inner casing, both of which are cylindrical structures; the inner casing is fixed inside the outer casing; a drain pipe is connected to the inner casing, and the bottom of the drain pipe communicates with the feed preheating tank. This utility model allows for efficient energy utilization, improves energy efficiency, reduces energy consumption, and lowers costs.

Description

Technical Field

[0001] This utility model relates to the field of wastewater recycling treatment technology, specifically a wastewater recycling distillation tower. Background Technology

[0002] Wastewater recycling distillation towers recover distilled water through heating and separation. Water in the evaporation kettle is heated, evaporated, and the rising vaporized water is then cooled to become distilled water. With technological advancements, the petrochemical, metallurgical, electronics, and food industries often generate large amounts of wastewater containing ammonia nitrogen during manufacturing processes. Currently, most ammonia-containing wastewater discharged from manufacturing processes undergoes wastewater distillation treatment to reduce the ammonia concentration in the wastewater and recover the ammonia. However, current wastewater recycling distillation processes suffer from high energy loss and do not utilize heat energy more effectively. Therefore, addressing the shortcomings and deficiencies of existing technologies is a pressing issue for businesses in this industry. Utility Model Content

[0003] The purpose of this utility model is to provide a solution to the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a wastewater circulating distillation tower, comprising a circulating distillation tower body, a feed preheating tank, and a condenser. One end of the feed preheating tank is connected to the circulating distillation tower body via a preheated material conveying pipe. The top of the circulating distillation tower body is connected to the condenser via a gas guide pipe. The condenser is connected to a circulating water inlet and a circulating water outlet. A heat exchange device is installed between the feed preheating tank and the condenser. The heat exchange device is connected to the condenser via the circulating water inlet and the circulating water outlet. The heat exchange device includes an outer casing and an inner casing, both of which are cylindrical structures. The inner casing is fixed inside the outer casing. A drain pipe is connected to the inner casing, and the bottom of the drain pipe is connected to the feed preheating tank.

[0005] In the aforementioned wastewater circulating distillation tower, a first heat exchange pipe and a second heat exchange pipe are arranged around the outside of the inner casing. The two ends of the first heat exchange pipe are connected to the circulating water inlet and the circulating water outlet, respectively.

[0006] In the aforementioned wastewater circulating distillation tower, the heat exchange device further includes a wastewater pipe, one end of which is connected to a second heat exchange pipe, and the other end of the second heat exchange pipe is connected to the inner casing.

[0007] In the aforementioned wastewater circulating distillation tower, the first heat exchange pipe and the second heat exchange pipe are arranged alternately on the outside of the inner casing.

[0008] In the aforementioned wastewater circulating distillation tower, a discharge pipe is provided at the bottom of the main body of the circulating distillation tower.

[0009] In the aforementioned wastewater circulating distillation tower, a temperature indicator is connected to the drain pipe.

[0010] In the aforementioned wastewater circulating distillation tower, a temperature sensor is installed inside the main body of the circulating distillation tower, and a fan is installed on the preheated material conveying pipe. The temperature sensor is connected to the fan circuit control.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention features a heat exchange device installed between the feed preheating tank and the condenser. Wastewater enters the second heat exchange pipe through a wastewater pipe. Because the first heat exchange pipe is higher in the inner casing, it transfers heat to the second heat exchange pipe. The first heat exchange pipe is cooled and re-enters the condenser, while the second heat exchange pipe is heated before entering the inner casing. Simultaneously, because the outer wall of the inner casing is in contact with the first heat exchange pipe, it can better absorb the heat from the first heat exchange pipe. The steam from the inner casing enters the feed preheating tank through a drain pipe. The steam generated in the feed preheating tank enters the main body of the circulating distillation tower for distillation. In this way, energy can be used efficiently, improving energy utilization efficiency, reducing energy consumption, and lowering costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the heat exchange device of this utility model;

[0015] Figure 3 This is a side view of the heat exchange device of this utility model.

[0016] In the diagram: 1. Main body of the circulating distillation tower; 2. Condenser; 3. Feed preheating tank; 4. Preheated material conveying pipe; 5. Circulating water outlet; 6. Circulating water inlet; 7. Heat exchange device; 8. Outer casing; 9. Inner casing; 10. Drain pipe; 11. First heat exchange pipe; 12. Second heat exchange pipe; 13. Wastewater pipe; 14. Discharge pipe; 15. Temperature indicator; 16. Temperature sensor; 17. Fan; 18. Gas guide pipe. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-3 This utility model provides a wastewater circulating distillation tower technical solution: it includes a circulating distillation tower body 1, a feed preheating tank 3, and a condenser 2. One end of the feed preheating tank 3 is connected to the circulating distillation tower body 1 through a preheated material conveying pipe 4. The top of the circulating distillation tower body 1 is connected to the condenser 2 through a gas guide pipe 18. The condenser 2 is connected to a circulating water inlet 6 and a circulating water outlet 5. A heat exchange device 7 is installed between the feed preheating tank 3 and the condenser 2. The heat exchange device 7 is connected to the condenser 2 through the circulating water inlet 6 and the circulating water outlet 5. The heat exchange device 7 includes an outer casing 8 and an inner casing 9. Both the outer casing 8 and the inner casing 9 are cylindrical structures. The inner casing 9 is fixed inside the outer casing 8. A drain pipe 10 is connected to the inner casing 9. The bottom of the drain pipe 10 is connected to the feed preheating tank 3.

[0019] Furthermore, the inner casing 9 is surrounded by a first heat exchange pipe 11 and a second heat exchange pipe 12. The two ends of the first heat exchange pipe 11 are connected to the circulating water inlet 6 and the circulating water outlet 5, respectively. The circulating water inlet 6 and the circulating water outlet 5 are used to circulate the water and liquefy the high-temperature steam.

[0020] Furthermore, the heat exchange device 7 also includes a wastewater pipe 13, one end of which is connected to a second heat exchange pipe 12, and the other end of the second heat exchange pipe 12 is connected to the inner box 9. The heat exchange device 7 can absorb heat, thereby reducing the energy consumption of the feed preheating tank 3.

[0021] Furthermore, the first heat exchange pipe 11 and the second heat exchange pipe 12 are staggered outside the inner casing 9, which can increase the contact area between the first heat exchange pipe 11 and the second heat exchange pipe 12.

[0022] Furthermore, a discharge pipe 14 is provided at the bottom of the circulating distillation column body 1, which is used to discharge the liquid inside the circulating distillation column body 1.

[0023] Furthermore, a temperature indicator 15 is connected to the drain pipe 10, which allows for real-time observation of temperature changes on the drain pipe 10.

[0024] Furthermore, a temperature sensor 16 is installed inside the main body 1 of the circulating distillation column, and a fan 17 is installed on the preheating material conveying pipe 4. The temperature sensor 16 is connected to the fan 17 by circuit control. The temperature sensor 16 can monitor the temperature change inside the main body 1 of the circulating distillation column, and the fan 17 can control the flow rate, thereby controlling the temperature inside the main body 1 of the circulating distillation column.

[0025] Working principle: In use, wastewater is discharged through wastewater pipe 13 and enters the second heat exchange pipe 12. Because the first heat exchange pipe 11 is higher in the inner casing 9, it is heated by the high-temperature steam absorbed by the condenser 2. The higher temperature of the first heat exchange pipe 11 transfers heat to the second heat exchange pipe 12, which is then cooled and re-enters the condenser 2. Meanwhile, the second heat exchange pipe 12 is heated and enters the inner casing 9. Simultaneously, because the outer wall of the inner casing 9 is in contact with the first heat exchange pipe 11, it can better absorb the heat from the first heat exchange pipe 11. The steam from the inner casing 9 enters the feed preheating tank 3 through the drain pipe 10. The steam generated in the feed preheating tank 3 enters the main body of the circulating distillation tower 1 for distillation. This allows for efficient energy utilization and reduces costs.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] 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 wastewater circulating distillation column comprising a circulating distillation column main body (1), a feed preheating tank (3), and a condenser (2), characterized by: One end of the feed preheating tank (3) is connected to the main body (1) of the circulating distillation tower through the preheating material conveying pipe (4). The top of the main body (1) of the circulating distillation tower is connected to the condenser (2) through the gas guide pipe (18). The condenser (2) is connected to a circulating water inlet (6) and a circulating water outlet (5). A heat exchange device (7) is installed between the feed preheating tank (3) and the condenser (2). The heat exchange device (7) is connected to the condenser (2) through the circulating water inlet (6) and the circulating water outlet (5). The heat exchange device (7) includes an outer casing (8) and an inner casing (9). Both the outer casing (8) and the inner casing (9) are cylindrical structures. The inner casing (9) is fixed inside the outer casing (8). A drain pipe (10) is connected to the inner casing (9). The bottom of the drain pipe (10) is connected to the feed preheating tank (3).

2. The wastewater circulating distillation tower according to claim 1, characterized in that, The inner casing (9) is surrounded by a first heat exchange pipe (11) and a second heat exchange pipe (12). The two ends of the first heat exchange pipe (11) are connected to the circulating water inlet (6) and the circulating water outlet (5), respectively.

3. The wastewater circulating distillation tower according to claim 2, characterized in that, The heat exchange device (7) also includes a wastewater pipe (13), one end of which is connected to a second heat exchange pipe (12), and the other end of the second heat exchange pipe (12) is connected to the inner box (9).

4. A wastewater circulating distillation tower according to claim 3, characterized in that, The first heat exchange pipe (11) and the second heat exchange pipe (12) are staggered outside the inner casing (9).

5. A wastewater circulating distillation tower according to claim 4, characterized in that, The bottom of the circulating distillation tower body (1) is provided with a discharge pipe (14).

6. A wastewater circulating distillation tower according to claim 5, characterized in that, A temperature indicator (15) is connected to the drain pipe (10).

7. A wastewater circulating distillation tower according to claim 6, characterized in that, A temperature sensor (16) is installed inside the main body (1) of the circulating distillation tower, and a fan (17) is installed on the preheating material conveying pipe (4). The temperature sensor (16) is connected to the fan (17) via circuit control.

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