Steam flash evaporation device

Abstract

The utility model discloses a steam flash evaporation device which comprises a flash evaporation tank, the flash evaporation tank comprises a gas-liquid separation device and a feeding port, the feeding port is formed in the side wall of the flash evaporation tank, a pressure regulating valve is arranged at the feeding port, the gas-liquid separation device comprises a baffle, a positive friction assembly and a negative friction assembly, and the positive friction assembly and the negative friction assembly are arranged on the baffle. The baffle is fixedly installed above the feeding port, the positive friction assembly and the negative friction assembly are fixedly installed on the baffle, a plurality of through holes are formed in the positive friction assembly, and the included angle between the axis of each through hole and the axis of the positive friction assembly is 30 degrees. The device has the beneficial effects that liquid drops are positively charged after part of steam passes through the through holes of the positive friction assembly, the liquid drops are negatively charged after part of steam passes through the through holes of the negative friction assembly, and the liquid drops with different charges are agglomerated to generate larger liquid drops under the action of electrostatic force after the liquid drops are in contact with the two friction assemblies; the flash tank falls off due to gravity and is separated from gas, so that the gas-liquid separation effect of the flash tank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flash evaporation, in particular to a steam flash evaporation device. Background Art

[0002] In the decarbonization process of synthetic ammonia, various adsorption liquids are often needed to absorb impurities in the mixed gas to achieve the effect of gas purification. In order to reduce costs, after the adsorption liquid absorbs the impurity gas, it is depressurized and vaporized through a flash evaporation device such as a flash tank to separate the gas and liquid.

[0003] When saturated liquid enters a flash tank, it vaporizes due to pressure drop, producing a large amount of steam. However, during this vaporization process, the steam is mixed with a large number of liquid droplets. If this liquid is not separated and directly enters downstream equipment, it will affect the normal operation of the downstream equipment. Previous flash tank structures installed a baffle below the steam discharge port. When the steam encounters the baffle, some liquid droplets are blocked by the baffle, but some droplets are still carried away with the steam, making the steam mixed with the original liquid components and impure. Utility Model Content

[0004] In view of the above-mentioned prior art, the present invention provides a steam flash evaporation device, which mainly solves the technical problems existing in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the technical solution of the embodiment of the present utility model is implemented as follows:

[0006] A steam flash device comprises a flash tank, the flash tank comprising a gas-liquid separation device and a feed port, the feed port being provided on a side wall of the flash tank, a pressure regulating valve being provided at the feed port, the gas-liquid separation device being provided in the flash tank, the gas-liquid separation device comprising a baffle, a positive friction assembly and a negative friction assembly, the baffle being fixedly mounted above the feed port, the positive friction assembly and the negative friction assembly being fixedly mounted on the baffle, a plurality of through holes being provided in the positive friction assembly, the axis of the through holes being 30° to the axis of the positive friction assembly, the structure of the negative friction assembly being the same as that of the positive friction assembly, and the axis of the through hole of the positive friction assembly intersecting with the axis of the through hole of the negative friction assembly.

[0007] Preferably, an air outlet is provided at the top of the flash tank, and a wire mesh demister is fixedly installed at the air outlet.

[0008] Preferably, a liquid outlet is provided at the bottom of the flash tank.

[0009] Preferably, the positive friction component and the negative friction component are made of metallic conductive material.

[0010] Preferably, the through hole of the positive friction component is coated with a strong negative charge coating, and the material of the strong negative charge coating is polytetrafluoroethylene.

[0011] Preferably, the through hole of the negative friction component is coated with a strong positive coating, and the material of the strong positive coating is nylon.

[0012] Preferably, the bottom of the flash tank is provided with support legs.

[0013] The beneficial effect of the present invention is that after part of the steam passes through the through-holes of the positive friction component, the droplets are charged with positive charges, and after part of the steam passes through the through-holes of the negative friction component, the droplets are charged with negative charges. After contacting the two friction components, the droplets with different charges agglomerate to form larger droplets under the action of electrostatic force, and fall due to gravity and separate from the gas, thereby improving the gas-liquid separation effect of the flash tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a steam flash evaporation device in an embodiment of the present application;

[0015] Figure 2 This is a schematic structural diagram of the positive friction assembly and the negative friction assembly in an embodiment of the present application;

[0016] Description of Figure Numbers:

[0017] 1. Flash tank; 2. Feed inlet; 3. Pressure regulating valve; 4. Baffle; 5. Positive friction assembly; 6. Negative friction assembly; 7. Through hole; 8. Air outlet; 9. Wire mesh demister; 10. Liquid outlet; 11. Support leg. DETAILED DESCRIPTION

[0018] The following is a further detailed description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. In the following description, reference is made to "some embodiments", which describes a subset of all possible embodiments, but it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0019] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0020] Example 1

[0021] Please refer to the attached Figure 1-2 The present application provides a steam flash device, including a flash tank 1, the flash tank 1 including a gas-liquid separation device and a feed port 2, the feed port 2 is provided on the side wall of the flash tank 1, and a pressure regulating valve 3 is provided at the feed port 2. The flash tank 1 is provided with the gas-liquid separation device, and the gas-liquid separation device includes a baffle 4, a positive friction component 5 and a negative friction component 6. The baffle 4 is fixedly installed above the feed port 2, and the positive friction component 5 and the negative friction component 6 are fixedly installed on the baffle 4. A plurality of through holes 7 are provided in the positive friction component 5, and the axis of the through hole 7 is 30° with the axis of the positive friction component 5. The structure of the negative friction component 6 is the same as that of the positive friction component 5, and the axis of the through hole 7 of the positive friction component 5 intersects with the axis of the through hole 7 of the negative friction component 6. The saturated liquid containing product gas enters the flash tank 1 through the feed inlet 2, is depressurized by the pressure reducing valve, and is sprayed into the tank. The boiling point of the saturated liquid is reduced by the pressure reduction, generating a large amount of steam. Some droplets in the steam fall to the bottom of the flash tank 1 by gravity for collection, most of the droplets rise with the steam, some droplets are blocked by the baffle 4, and some steam enters the positive friction component 5 and the negative friction component 6, and contacts the strong positive and negative coatings in the through-hole 7, so that the droplets in the steam are charged. The charged droplets are adsorbed together by electrostatic force to form larger droplets, which fall by gravity and separate from the gas, thereby improving the gas-liquid separation effect of the flash tank 1. The axis of the through-hole 7 is 30° to the axis of the positive friction component 5, and the axis of the through-hole 7 of the positive friction component 5 intersects with the axis of the through-hole 7 of the negative friction component 6. The purpose is to make the droplets in the steam fully contact and rub with the friction layer, and at the same time ensure that the charged droplets can be better agglomerated after the steam passes through the positive friction component 5 and the negative friction component 6. Preferably, the flash tank 1 is grounded to avoid static electricity accumulation of liquid droplets.

[0022] Specifically, the top of the flash tank 1 is provided with an air outlet 8, to which a wire mesh demister 9 is fixedly mounted. Pure gas is discharged from the flash tank 1 through the air outlet 8, maintaining a low-pressure environment within the flash tank 1 and facilitating subsequent flash operations. The wire mesh demister 9 at the air outlet 8 serves to intercept rising foam and improve the purity of the gas.

[0023] Specifically, a liquid outlet 10 is provided at the bottom of the flash tank 1. Liquid collected at the bottom of the flash tank 1 is discharged from the flash tank 1 through the liquid outlet 10, avoiding contact between the conductive rod and the liquid, thereby making the flash tank 1 conductive.

[0024] Specifically, the positive friction component 5 and the negative friction component 6 are made of a metal conductive material. The positive friction component 5 and the negative friction component 6 are made of metal to eliminate static electricity generated by friction on the positive friction component 5 and the negative friction component 6.

[0025] Specifically, the through-holes 7 of the positive friction component 5 are coated with a strongly negatively charged coating made of polytetrafluoroethylene. When droplets in the steam come into contact with the coating, the strong electronegativity of the coating imparts a positive charge to the droplets. This facilitates the steam's exit from the positive friction component 5 and its subsequent reunion with the steam ejected from the negative friction component 6. The droplets are attracted to each other by electrostatic forces, improving gas-liquid separation efficiency.

[0026] Specifically, the through-holes 7 of the negative friction component 6 are coated with a strongly positively charged coating made of nylon. When liquid droplets in the steam come into contact with the strongly positively charged coating within the through-holes 7 of the negative friction component 6, the strong electropositivity of the coating imparts a negative charge to the liquid droplets. This facilitates the steam's exit from the negative friction component 6 and subsequent reunion with the steam ejected from the positive friction component 5. The droplets are attracted to each other by electrostatic forces, improving gas-liquid separation efficiency.

[0027] Specifically, the bottom of the flash tank 1 is provided with support legs 11. The function of installing the support legs 11 at the bottom of the flash tank 1 is to improve the stability of the flash tank 1.

[0028] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to them. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. The scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A steam flash device, characterized in that: It comprises a flash tank, which comprises a gas-liquid separation device and a feed port. The feed port is provided on the side wall of the flash tank, and a pressure regulating valve is provided at the feed port. The gas-liquid separation device is provided in the flash tank, and the gas-liquid separation device comprises a baffle, a positive friction assembly and a negative friction assembly. The baffle is fixedly installed above the feed port, and the positive friction assembly and the negative friction assembly are fixedly installed on the baffle. A plurality of through holes are provided in the positive friction assembly, and the axis of the through hole is 30° to the axis of the positive friction assembly. The structure of the negative friction assembly is the same as that of the positive friction assembly, and the axis of the through hole of the positive friction assembly intersects with the axis of the through hole of the negative friction assembly.

2. A steam flash device according to claim 1, characterized in that: An air outlet is provided on the top of the flash tank, and a wire mesh demister is fixedly installed at the air outlet.

3. A steam flash evaporation device according to claim 1, characterized in that: A liquid outlet is provided at the bottom of the flash tank.

4. A steam flash evaporation device according to claim 1, characterized in that: The positive friction component and the negative friction component are made of metallic conductive material.

5. A steam flash evaporation device according to claim 1, characterized in that: The through hole of the positive friction component is coated with a strong negative charge coating, and the material of the strong negative charge coating is polytetrafluoroethylene.

6. A steam flash evaporation device according to claim 1, characterized in that: The through hole of the negative friction component is coated with a strong positive coating, and the material of the strong positive coating is nylon.

7. A steam flash evaporation device according to claim 1, characterized in that: The bottom of the flash tank is provided with supporting legs.

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