Flash tank equipment for hydrogen peroxide treatment vacuum dehydration

Abstract

The utility model is applicable to the technical field of flash tank equipment, and provides flash tank equipment for hydrogen peroxide treatment vacuum dehydration, which comprises a barrel, a liquid inlet pipe is vertically arranged in an inner cavity of the barrel, the middle of the inner cavity of the barrel is fixedly connected with a distributor through a support frame, the top end of the liquid inlet pipe extends to the outside of the barrel, and the top end of the liquid inlet pipe is fixedly connected with the distributor. The bottom end of the barrel body is communicated with the top of the distributor, the bottom of the distributor is detachably communicated with a plurality of spray heads, and the upper part of an inner cavity of the barrel body is fixedly connected with a sieve plate. According to the flash tank equipment for hydrogen peroxide treatment vacuum dehydration, through a hydrogen peroxide post-treatment procedure, the flash tank equipment for vacuum dehydration is reasonable in structure gas-liquid distribution, a flash filler is omitted, the resistance pressure difference of vacuumizing is reduced, the flash vacuum degree is improved, the flash dehydration effect is good, the structure is simple and practical, and the phenomenon that material liquid is entrained by vacuum gas is avoided; and stable operation of the device is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of flash tank equipment, in particular to a flash tank equipment used for vacuum dehydration of hydrogen peroxide treatment. Background Art

[0002] In the production of rare-product hydrogen peroxide, the working fluid must be partially dehydrated before entering the clay bed and hydrogenation tower to maximize the performance of the alumina and palladium catalysts. Currently, the main dehydration methods are adsorption dehydration with potassium carbonate solution (referred to as alkaline tower dehydration) and flash dehydration under vacuum (referred to as vacuum dehydration). Coalescing and separation dehydration is also a supplementary method.

[0003] The existing flash tank equipment used for vacuum dehydration in the hydrogen peroxide post-treatment process has an unreasonable gas-liquid distribution structure, which reduces the flash vacuum degree, resulting in poor flash dehydration effect. It is also easy for vacuum gas to carry over the liquid, which is not conducive to the stability of the device during operation. Utility Model Content

[0004] The utility model provides a flash evaporation tank device for vacuum dehydration in hydrogen peroxide treatment, aiming to solve the problem that the existing flash evaporation tank device for vacuum dehydration in hydrogen peroxide post-treatment process has unreasonable gas-liquid distribution in the device structure, reduces the flash evaporation vacuum degree, and thus makes the flash evaporation dehydration effect poor.

[0005] The utility model is realized as follows: a flash tank device for vacuum dehydration of hydrogen peroxide treatment comprises a cylinder, a liquid inlet pipe is vertically provided in the inner cavity of the cylinder, a distributor is fixedly connected to the middle of the inner cavity of the cylinder via a support frame, the top end of the liquid inlet pipe extends to the outside of the cylinder, the bottom end of the cylinder is connected to the top of the distributor, and the bottom of the distributor is disassembled and connected to a plurality of spray heads;

[0006] A sieve plate is fixedly connected to the upper part of the inner cavity of the cylinder, a plurality of through holes are opened on the surface of the sieve plate, a plurality of air risers are connected to the upper surface of the sieve plate, and a shielding support plate is fixedly connected to the top of the air riser;

[0007] The top of the cylinder is connected to an exhaust pipe, and the top of the inner wall of the cylinder is fixedly connected to a demister surrounding the outside of the bottom end of the exhaust pipe.

[0008] Preferably, the bottom of the cylinder is vertically connected to a liquid outlet pipe, and the bottom of the inner wall of the cylinder is fixedly connected to an anti-vortex plate located at the top of the liquid outlet pipe.

[0009] Preferably, an inspection cover is detachably connected to the surface of the cylinder by a plurality of screws, and an observation window is provided on the surface of the inspection cover.

[0010] Preferably, a plurality of spray ports are provided on the lower surface of the distributor, and the plurality of spray ports correspond one-to-one to the plurality of spray heads. An external threaded pipe is provided on the top of the spray head, and an internal threaded pipe adapted to the external threaded pipe is fixedly connected to the inside of the spray port.

[0011] Preferably, a plurality of anti-slip grooves are provided on the surface of the shower head, and the plurality of anti-slip grooves are evenly distributed in a circular pattern along the surface of the shower head.

[0012] Preferably, a pressure sensor is provided on the cylinder, a temperature sensor is provided on the cylinder, and a liquid level sensor is provided in the inner cavity of the cylinder.

[0013] Beneficial effects

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the flash tank device for vacuum dehydration of hydrogen peroxide treatment of the present invention is a flash tank device for vacuum dehydration in a hydrogen peroxide post-treatment process. The device has a reasonable gas-liquid distribution structure, eliminates flash filler, reduces the resistance pressure difference of vacuuming, improves the flash vacuum degree, has a good flash dehydration effect, is simple and practical in structure, avoids the phenomenon of vacuum gas entraining liquid, and is conducive to the stable operation of the device. The device eliminates flash filler and filler support and compression assemblies, reduces the equipment production cost, reduces the resistance pressure difference caused by the filler, and is conducive to saving the power consumption of the vacuum pump. The working fluid enters from the middle, which is conducive to uniform distribution, has a good flash dehydration effect, and double-protects the liquid entrainment situation of the suction port, effectively reduces the phenomenon of gas entrainment of material, and is conducive to protecting the stability of the vacuum pump equipment and the production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front cross-sectional structural diagram of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the distributor and the sprinkler head in the utility model;

[0017] Figure 3 It is a structural diagram of the cylinder and the inspection cover in the present invention.

[0018] In the figure: 1. Spray nozzle; 2. Support frame; 3. Distributor; 4. Sieve plate; 5. Air riser; 6. Cylinder; 7. Liquid inlet pipe; 8. Exhaust pipe; 9. Demister; 10. Anti-vortex plate; 11. Liquid outlet pipe; 12. Spray head; 13. Externally threaded pipe; 14. Internally threaded pipe; 15. Anti-slip groove; 16. Shielding support plate; 17. Screws; 18. Inspection cover; 19. Observation window; 20. Pressure sensor; 21. Liquid level sensor; 22. Temperature sensor. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] See also Figure 1-3 The utility model provides a technical solution: a flash tank device for vacuum dehydration of hydrogen peroxide treatment, comprising a cylinder 6, an inner cavity of the cylinder 6 is vertically provided with a liquid inlet pipe 7, the middle part of the inner cavity of the cylinder 6 is fixedly connected to a distributor 3 through a support frame 2, and the top end of the liquid inlet pipe 7 extends to the outside of the cylinder 6.

[0021] The bottom end of the cylinder 6 is connected to the top of the distributor 3, and the bottom of the distributor 3 is disassembled and connected to a plurality of spray heads 12.

[0022] A sieve plate 4 is fixedly connected to the upper part of the inner cavity of the cylinder 6. A plurality of through holes are opened on the surface of the sieve plate 4. A plurality of air risers 5 are connected to the upper surface of the sieve plate 4. A shielding support plate 16 is fixedly connected to the top of the air riser 5.

[0023] The top of the cylinder 6 is connected to an exhaust pipe 8, and the top of the inner wall of the cylinder 6 is fixedly connected to a demister 9 surrounding the outside of the bottom end of the exhaust pipe 8.

[0024] The working liquid is injected into the inner cavity of the distributor 3 through the liquid inlet pipe 7. After being divided by the distributor 3, the working liquid is sprayed out through multiple spray heads 12, which is beneficial for the distributor 3 to spray evenly and prevent deviation.

[0025] The sieve plate 4 is evenly distributed with through holes of DN10 to 20 mm, which serves to block part of the liquid splashing upward.

[0026] The shielding support plate 16 at the upper end of the riser 5 prevents the gas from entraining the liquid feed. The entrained liquid feed can flow downward through the through holes of the sieve plate 4.

[0027] The demister 9 further removes the liquid droplets entrained by the gas, and the liquid condensed by the demister 9 directly drips back into the device.

[0028] Furthermore, a liquid outlet pipe 11 is vertically connected to the bottom of the cylinder 6 , and an anti-vortex plate 10 located at the top of the liquid outlet pipe 11 is fixedly connected to the bottom of the inner wall of the cylinder 6 .

[0029] In this embodiment, the cylinder 6 adopts ear-type support and is suspended on the floor 20m higher than the pressure sensor to facilitate pipe connection and ensure that there is a net height difference of 10 meters between the liquid outlet pipe 11 and the next equipment to prevent the liquid from flowing back.

[0030] The anti-eddy current baffle 10 is in a cross shape and has a length of about 1.5 times the diameter of the pipe mouth.

[0031] Furthermore, an inspection cover 18 is detachably connected to the surface of the cylinder 6 by a plurality of screws 17 , and an observation window 19 is provided on the surface of the inspection cover 18 .

[0032] In this embodiment, the observation window 19 is convenient for the staff to check the working status of the device. After removing the plurality of screws 17, the inspection cover 18 can be removed, which is convenient for later inspection and maintenance of the interior of the device.

[0033] Furthermore, a plurality of spray ports 1 are provided on the lower surface of the distributor 3, and the plurality of spray ports 1 correspond one-to-one to the plurality of spray heads 12. An external threaded pipe 13 is provided on the top of the spray head 12, and an internal threaded pipe 14 adapted to the external threaded pipe 13 is fixedly connected to the inside of the spray port 1.

[0034] In this embodiment, the spray head 12 is twisted and the external threaded pipe 13 is threadedly connected to the internal threaded pipe 14, so that the spray head 12 and the spray port 1 can be disassembled and connected to start liquid spraying.

[0035] Furthermore, a plurality of anti-slip grooves 15 are provided on the surface of the shower head 12 . The plurality of anti-slip grooves 15 are evenly distributed and spaced in a circular pattern along the surface of the shower head 12 .

[0036] In this embodiment, the anti-slip grooves 15 facilitate the staff to twist the sprinkler head 12 to rotate, and facilitate the staff to disassemble and assemble the sprinkler head 12.

[0037] Furthermore, a pressure sensor 20 is provided on the cylinder 6 , a temperature sensor 22 is provided on the cylinder 6 , and a liquid level sensor 21 is provided in the inner cavity of the cylinder 6 .

[0038] In this embodiment, the pressure sensor 20, the liquid level sensor 21 and the temperature sensor 22 cooperate to facilitate the staff to control the working status of the device.

[0039] The working principle and usage process of the utility model: After the utility model is installed, the vacuum dehydration adopts the flash evaporation principle. The working fluid at a certain temperature enters the flash evaporation tank, and the pressure suddenly drops to negative pressure. The working fluid temperature is higher than the saturation temperature corresponding to the negative pressure environment. At this time, the liquid is in a non-equilibrium superheated state. Due to the sudden pressure drop, the overheated working fluid undergoes violent gasification, forming a flash evaporation phenomenon; if the working fluid temperature is higher than the boiling point under the pressure, boiling will occur. Since the vapor pressure of water is significantly higher than that of heavy aromatics, trioctyl phosphate, tetrabutyl urea, and acetate, water is enriched in the steam generated by the above process and is extracted by vacuum, thereby achieving partial removal of moisture.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A flash tank device for vacuum dehydration of hydrogen peroxide treatment, comprising a cylinder (6), characterized in that: The inner cavity of the cylinder (6) is vertically provided with a liquid inlet pipe (7), the middle part of the inner cavity of the cylinder (6) is fixedly connected to a distributor (3) through a support frame (2), the top end of the liquid inlet pipe (7) extends to the outside of the cylinder (6), the bottom end of the cylinder (6) is connected to the top of the distributor (3), and the bottom of the distributor (3) is disassembled and connected to a plurality of spray heads (12); A sieve plate (4) is fixedly connected to the upper portion of the inner cavity of the cylinder (6), a plurality of through holes are provided on the surface of the sieve plate (4), a plurality of air risers (5) are connected to the upper surface of the sieve plate (4), and a shielding support plate (16) is fixedly connected to the top of the air riser (5); The top of the cylinder (6) is connected to an exhaust pipe (8), and the top of the inner wall of the cylinder (6) is fixedly connected to a demister (9) surrounding the outside of the bottom end of the exhaust pipe (8).

2. The flash tank device for vacuum dehydration of hydrogen peroxide treatment according to claim 1, characterized in that: The bottom of the cylinder (6) is vertically connected to a liquid outlet pipe (11), and the bottom of the inner wall of the cylinder (6) is fixedly connected to an anti-vortex plate (10) located at the top of the liquid outlet pipe (11).

3. The flash tank device for vacuum dehydration of hydrogen peroxide treatment according to claim 1, characterized in that: The surface of the cylinder (6) is detachably connected to an inspection cover plate (18) via a plurality of screws (17), and an observation window (19) is provided on the surface of the inspection cover plate (18).

4. The flash tank device for vacuum dehydration of hydrogen peroxide treatment according to claim 1, characterized in that: The lower surface of the distributor (3) is provided with a plurality of spray ports (1), and the plurality of spray ports (1) correspond one-to-one to the plurality of spray heads (12). The top of the spray head (12) is provided with an external threaded pipe (13), and the interior of the spray port (1) is fixedly connected with an internal threaded pipe (14) adapted to the external threaded pipe (13).

5. A flash tank device for vacuum dehydration of hydrogen peroxide as claimed in claim 4, characterized in that: The surface of the spray head (12) is provided with a plurality of anti-slip grooves (15), and the plurality of anti-slip grooves (15) are evenly spaced and distributed in a circular manner along the surface of the spray head (12).

6. The flash tank device for vacuum dehydration of hydrogen peroxide treatment according to claim 1, characterized in that: The cylinder (6) is provided with a pressure sensor (20), the cylinder (6) is provided with a temperature sensor (22), and the inner cavity of the cylinder (6) is provided with a liquid level sensor (21).

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