A desalted water pre-cooling mechanism for an air separation system

Abstract

The application discloses a kind of desalted water precooling mechanism for air separation system, including box, the inner top of the box is equipped with feed hopper, the upper end of the box is installed with drive motor, the output shaft end of the drive motor extends to the box and is fixedly connected with first gear, the inner top and inner bottom of the box are rotatably connected with the rotation bar, the rotation bar is equipped with the second gear matched with first gear, the upper end of the box is installed with cold air machine, the rotation bar is equipped with first channel and second channel.The device is rotated by the first serpentine pipe, and the cold air flow flows in the serpentine pipe at the same time, so that the desalted water can be uniformly cooled, and when the exhaust air temperature is low, the air flow can enter the second serpentine pipe, reducing the use of energy while improving the cooling effect of the desalted water, and the remaining carbon dioxide in the box can be reduced by the cleaning box to ensure the quality of the desalted water.

Description

Technical Field

[0001] The invention relates to the technical field of air separation devices, in particular to a desalted water precooling mechanism for an air separation system. Background Art

[0002] An air separation unit (ASU) uses air as raw material, converts the air into liquid form through a compression cycle and deep freezing method, and then gradually separates the air from the liquid air through distillation to produce inert gases such as oxygen, nitrogen, and argon. It is widely used in metallurgy, coal chemical industry, large-scale nitrogen fertilizer, and professional gas supply. The air cooling system of an ASU often uses demineralized water for cooling. During the demineralized water production process, the demineralized water needs to be pre-cooled. However, existing demineralized water pre-cooling equipment still has the following problems when used:

[0003] Most of the existing desalted water pre-cooling equipment cools the desalted water through cooling fins during pre-cooling. Since the desalted water in the box is in a static state, the cooling efficiency of the desalted water is low. At the same time, when the desalted water is added to the box, a part of the air will remain in the box. The air contains a certain amount of carbon dioxide. These carbon dioxide will dissolve in the desalted water, causing the pH value of the desalted water to change. Therefore, how to reasonably solve this problem is what we need to consider. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, and a desalted water precooling mechanism for an air separation system is proposed. The device rotates the first serpentine tube while the cold air flow flows in the serpentine tube, so that the desalted water can be evenly cooled. At the same time, through the setting of the temperature sensor, when the exhaust air flow temperature is low, the air flow can enter the second serpentine tube, reducing energy utilization while improving the cooling effect of the desalted water. The cleaning box can also reduce the residual carbon dioxide in the box to ensure the quality of the desalted water.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The gear train is connected with the gear train of the gear train control device, and the gear train is connected with the gear train of the gear train control device, and the gear train is connected with the gear train of the gear train control device.

[0007] Preferably, a partition is provided in the box body, a feed port is provided on the partition, a valve is provided on the feed port, and the rotating rod passes through the partition.

[0008] Preferably, a cleaning box is installed on the left side of the box body, an air inlet is provided at the inner bottom of the cleaning box, a mesh box is provided in the cleaning box, the mesh box is filled with sodium hydroxide particles, the air inlet end of the air cooler is connected with a three-way pipe, the three-way pipe is connected by two branch pipes and a main pipe, the branch pipe located on the left is connected with the top space of the cleaning box, a hollow plate is provided on the left inner wall of the box body, a plurality of air outlets are provided on the right side of the hollow plate, and the left side of the hollow plate is connected with the air inlet pipe through a connecting pipe.

[0009] Preferably, solenoid valves are provided on the two branch pipes, the air intake pipe and the connecting pipe.

[0010] Preferably, a second rotary joint is installed at the lower end of the box body, the lower end of the second channel is connected to the upper end of the second rotary joint, a fixed block is fixedly connected to the right side of the box body, a rectangular cavity is provided in the fixed block, a conversion assembly is provided in the rectangular cavity, and the lower end of the second rotary joint is connected to the left space of the rectangular cavity through a return pipe.

[0011] Preferably, the conversion assembly includes a slider arranged in a rectangular cavity, the slider is provided with a first opening and a second opening, the slider is slidingly connected to the inner wall of the rectangular cavity, an electromagnet is provided at the inner bottom of the rectangular cavity, and the electromagnet is elastically connected to the adjacent surface of the slider through a spring.

[0012] Preferably, the right side space of the rectangular cavity is connected to the outside through an exhaust pipe, and a second serpentine tube is provided in the box body, the air inlet end of the second serpentine tube is connected to the right side space of the rectangular cavity, and the air outlet end of the second serpentine tube is connected to the outside.

[0013] Preferably, a temperature sensor is provided in the reflux pipe.

[0014] The present invention has the following beneficial effects:

[0015] 1. Compared with the existing technology, by setting up the drive motor and the rotating rod, and providing the first serpentine tubes on both the left and right sides of the rotating rod, the flow of the cold air in the first serpentine tubes and the rotation of the two first serpentine tubes are utilized to make the desalted water evenly heated, thereby improving the pre-cooling effect of the desalted water;

[0016] 2. Compared with the existing technology, the configuration of the conversion component and the temperature sensor allows the exhaust air with a higher temperature to be discharged directly to the outside at the beginning of pre-cooling. After a period of pre-cooling, the exhaust gas temperature is lower and it will flow again in the second serpentine tube, thereby cooling the desalted water again and improving energy utilization.

[0017] 3. Compared with the existing technology, by setting up the cleaning box and the hollow plate, when pouring desalted water, the air flow above the partition is replaced by an air flow without carbon dioxide, thereby avoiding the carbon dioxide in the air in the box from dissolving in the desalted water, causing the pH value of the desalted water to change. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a desalted water precooling mechanism for an air separation system proposed by the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0020] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at B in the middle;

[0021] Figure 4 for Figure 1 Schematic diagram of the enlarged structure at C in the middle;

[0022] Figure 5 for Figure 1 Schematic diagram of the pipeline after conversion.

[0023] In the figure: 1 box body, 2 partition, 3 feed port, 4 feed hopper, 5 drive motor, 6 first gear, 7 rotating rod, 8 first rotary joint, 9 air inlet pipe, 10 hollow plate, 11 connecting pipe, 12 tee pipe, 13 cleaning box, 14 mesh box, 15 air inlet, 16 first serpentine pipe, 17 first channel, 18 second gear, 19 second channel, 20 second serpentine pipe, 21 second rotary joint, 22 temperature sensor, 23 reflux pipe, 24 fixed block, 25 rectangular cavity, 26 exhaust pipe, 27 slider, 28 first port, 29 second port, 30 spring, 31 electromagnet. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0025] Reference Figure 1-5 The top of the box body 1 is provided with a feed hopper 4, and the upper end of the box body 1 is provided with a driving motor 5. The end of the output shaft of the driving motor 5 extends into the box body 1 and is fixedly connected to the first gear 6. The inner top and inner bottom of the box body 1 are connected to the rotating rod 7 for rotation together. The rotating rod 7 is provided with a second gear 18 that cooperates with the first gear 6. An air cooler is installed at the upper end of the box body 1, and a first channel 17 and a second channel 19 are provided in the rotating rod 7. The lower end of the second channel 19 extends to the outside. A first rotary joint 8 is installed at the upper end of the box body 1. The upper end of the first rotary joint 8 is connected with the air outlet end of the air cooler through the air inlet pipe 9, and the upper end of the first channel 17 is connected with the lower end of the first rotary joint 8. First serpentine tubes 16 are provided on the left and right sides of the rotating rod 7. The air inlet ends of the two first serpentine tubes 16 are connected with the first channel 17, and the air outlet ends of the two first serpentine tubes 16 are connected with the second channel 19.

[0026] A partition 2 is provided in the box body 1 , a feed port 3 is provided on the partition 2 , a valve is provided on the feed port 3 , and a rotating rod 7 passes through the partition 2 .

[0027] Among them, a cleaning box 13 is installed on the left side of the box body 1, and an air inlet 15 is provided at the inner bottom of the cleaning box 13. A mesh box 14 is provided in the cleaning box 13, and the mesh box 14 is filled with sodium hydroxide particles. Sodium hydroxide can react with carbon dioxide, thereby removing carbon dioxide in the air flow. The air inlet end of the air cooler is connected with a three-way pipe 12, and the three-way pipe 12 is connected by two branch pipes and a main pipe. The branch pipe on the left is connected with the top space of the cleaning box 13, and a hollow plate 10 is provided on the left inner wall of the box body 1. A plurality of air outlets are provided on the right side of the hollow plate 10. The left side of the hollow plate 10 is connected with the air inlet pipe 9 through a connecting pipe 11. Solenoid valves are provided on the two branch pipes, the air inlet pipe 9 and the connecting pipe 11.

[0028] Among them, a second rotary joint 21 is installed at the lower end of the box body 1, the lower end of the second channel 19 is connected to the upper end of the second rotary joint 21, and a fixed block 24 is fixedly connected to the right side of the box body 1. A rectangular cavity 25 is provided in the fixed block 24, and a conversion component is provided in the rectangular cavity 25. The lower end of the second rotary joint 21 is connected to the left space of the rectangular cavity 25 through a return pipe 23, and the right space of the rectangular cavity 25 is connected to the outside world through an exhaust pipe 26. A second serpentine tube 20 is provided in the box body 1, and the air inlet end of the second serpentine tube 20 is connected to the right space of the rectangular cavity 25, and the air outlet end of the second serpentine tube 20 is connected to the outside world.

[0029] Among them, the conversion component includes a slider 27 arranged in the rectangular cavity 25, and the slider 27 is provided with a first opening 28 and a second opening 29. The slider 27 is slidably connected to the inner wall of the rectangular cavity 25, and an electromagnet 31 is provided at the inner bottom of the rectangular cavity 25. The electromagnet 31 and the adjacent surface of the slider 27 are elastically connected by a spring 30. A temperature sensor 22 is provided in the return pipe 23, and a controller and an external power supply are provided in the box body 1. When the temperature of the gas flowing in the return pipe 23 reaches the trigger temperature of the temperature sensor 22, the temperature sensor 22 will generate a signal to be transmitted to the controller, and the controller controls the electromagnet 31 to be energized. The external power supply, the controller and the electromagnet 31 form a loop through wires.

[0030] The functional principle of the present invention can be explained through the following operation mode: when pre-cooling the demineralized water, first, the solenoid valve on the branch pipe connected to the cleaning box 13 is energized and turned on, the solenoid valve on the other branch pipe is de-energized, and at the same time, the solenoid valve on the connecting pipe 11 is energized and turned on, the solenoid valve on the air inlet pipe 9 is de-energized and closed, and then the air cooler is started;

[0031] The operation of the air cooler will allow external air to enter the cleaning box 13. When the airflow passes through the sodium hydroxide particles in the cleaning box 13, the carbon dioxide will react with the sodium hydroxide, thereby cleaning the carbon dioxide in the air. At this time, the air without carbon dioxide will enter the box body 1, thereby discharging the air above the partition 2 to the outside through the feed hopper 4, reducing the residual carbon dioxide in the box body 1 and preventing carbon dioxide from dissolving in the desalted water.

[0032] After the air cooler has been running for a while, desalted water is added to the box body 1 through the feed hopper 4. The air cooler will continue to run for a while to perform preliminary cooling treatment on the desalted water, and then open the valve on the feed port 3 to allow the desalted water to fall into the space below the box body 1.

[0033] At this time, the solenoid valve on the branch pipe connected to the cleaning box 13 is powered off, the solenoid valve on the other branch pipe is powered on, and the solenoid valve on the connecting pipe 11 is powered off, and the solenoid valve on the air inlet pipe 9 is powered on. At this time, the operation of the air cooler will inject the cold air flow into the two first serpentine pipes 16, and at the same time start the drive motor 5, so that the rotating rod 7 drives the two first serpentine pipes 16 to rotate, disturbing the desalted water, so that the desalted water can be evenly cooled;

[0034] In the dehumidification state, due to the high temperature of the desalted water, the temperature of the gas discharged through the two first serpentine tubes 16 is high, and the electromagnet 31 is not energized. As a result, the gas is discharged to the outside through the exhaust pipe 26. As time goes by, the temperature of the desalted water continues to decrease. At this time, the heat absorption efficiency of the airflow flowing in the first serpentine tube 16 will continue to decrease, causing the temperature of the airflow passing through the return pipe 23 to be in a lowered state. When the temperature of the air discharged from the return pipe 23 reaches the trigger signal of the temperature sensor 22, the electromagnet 31 will be energized.

[0035] When the electromagnet 31 is energized, it will produce a repulsive force on the slider 27, causing the slider 27 to move upward, and the return pipe 23 is connected to the second serpentine pipe 20 through the second opening 29. At this time, the airflow discharged from the return pipe 23 will be discharged to the outside through the second serpentine pipe 20, so that the airflow with a lower temperature at this time can cool the desalted water again, thereby improving the utilization rate of energy.

[0036] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A desalted water precooling mechanism for an air separation system, comprising a housing (1), characterized in that: The inner top of the box (1) is provided with a feed hopper (4), the upper end of the box (1) is equipped with a drive motor (5), the output shaft end of the drive motor (5) extends into the box (1) and is fixedly connected to the first gear (6), the inner top and inner bottom of the box (1) are connected to a rotating rod (7) for rotation, the rotating rod (7) is provided with a second gear (18) that matches the first gear (6), the upper end of the box (1) is equipped with a cooling fan, the rotating rod (7) is provided with a first channel (17) and a second channel (19), the lower end of the second channel (19) extends to the outside, the upper end of the box (1) is equipped with a first rotary joint (8), the upper end of the first rotary joint (8) is connected to the air outlet of the cooling fan through the air inlet pipe (9), the upper end of the first channel (17) is connected to the lower end of the first rotary joint (8), the left and right sides of the rotating rod (7) are provided with first serpentine tubes (16), the two first serpentine tubes (1 6) is connected to the first channel (17), and the air outlet ends of the two first serpentine tubes (16) are connected to the second channel (19); a second rotary joint (21) is installed at the lower end of the box body (1), and the lower end of the second channel (19) is connected to the upper end of the second rotary joint (21); a fixed block (24) is fixedly connected to the right side of the box body (1), a rectangular cavity (25) is provided in the fixed block (24), and a conversion component is provided in the rectangular cavity (25); the lower end of the second rotary joint (21) is connected to the left side space of the rectangular cavity (25) through a return pipe (23); the right side space of the rectangular cavity (25) is connected to the outside through an exhaust pipe (26); a second serpentine tube (20) is provided in the box body (1), the air inlet end of the second serpentine tube (20) is connected to the right side space of the rectangular cavity (25), and the air outlet end of the second serpentine tube (20) is connected to the outside; a temperature sensor (22) is provided in the return pipe (23).

2. The desalted water precooling mechanism for an air separation system according to claim 1, characterized in that: A partition (2) is provided in the box body (1), a feed port (3) is provided on the partition (2), a valve is provided on the feed port (3), and the rotating rod (7) passes through the partition (2).

3. The desalted water precooling mechanism for an air separation system according to claim 1, characterized in that: A cleaning box (13) is installed on the left side of the box body (1), and an air inlet (15) is provided at the inner bottom of the cleaning box (13). A net box (14) is provided in the cleaning box (13), and the net box (14) is filled with sodium hydroxide particles. The air inlet end of the air cooler is connected to a three-way pipe (12), and the three-way pipe (12) is connected by two branch pipes and a main pipe. The branch pipe located on the left side is connected to the top space of the cleaning box (13). A hollow plate (10) is provided on the left inner wall of the box body (1), and a plurality of air outlets are provided on the right side of the hollow plate (10). The left side of the hollow plate (10) is connected to the air inlet pipe (9) through a connecting pipe (11).

4. The desalted water precooling mechanism for an air separation system according to claim 3, characterized in that: The two branch pipes, the air inlet pipe (9) and the connecting pipe (11) are all provided with solenoid valves.

5. The desalted water precooling mechanism for an air separation system according to claim 1, characterized in that: The conversion assembly comprises a slider (27) arranged in a rectangular cavity (25), the slider (27) being provided with a first opening (28) and a second opening (29), the slider (27) being slidably connected to the inner wall of the rectangular cavity (25), an electromagnet (31) being provided at the inner bottom of the rectangular cavity (25), and the electromagnet (31) being elastically connected to the adjacent surface of the slider (27) via a spring (30).

Images