A flash dehydration equipment for producing hydrogen peroxide using anthraquinone method

Abstract

The utility model discloses a flash dehydration device for producing hydrogen peroxide using an anthraquinone method with high efficiency, and relates to the technical field of hydrogen peroxide production, including: a flash tank body with a negative pressure cavity, the flash tank body is provided with a liquid inlet and a liquid outlet, the liquid inlet is located at the top of the flash tank body, the liquid outlet is located at the bottom of the flash tank body, and a vacuum air inlet is provided at the top of the flash tank body on one side of the liquid inlet, a liquid retaining filter plate is provided in the vacuum air inlet, the liquid inlet extends into the flash tank body and is connected to a vertically arranged flow guide pipe, and the two sides of the bottom of the flow guide pipe are respectively connected to branch distribution pipes. Beneficial effect: liquid enters and distributes from the bottom of the tower plate, vaporizes, and then vacuum air is extracted from the upper part of the tower plate in conjunction with the vacuum air inlet, and the vacuum air is extracted from the air riser hole. The liquid hits the tower plate and is completely isolated after condensing through the filtrate hole, which plays a good role in gas-liquid separation. At the same time, a small part of the liquid is isolated again through the liquid retaining filter plate, and the gas-liquid separation effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen peroxide production, in particular to a flash dehydration device for producing hydrogen peroxide using an efficient anthraquinone process. Background Art

[0002] In the traditional hydrogen peroxide production process, there is no flash tank, and the circulating working fluid is constantly circulating with water, which seriously affects the catalyst efficiency and production efficiency. With the continuous improvement and innovation of the process, a two-person flash tank is introduced in the hydrogen peroxide production process. Gradually, the flash tank has become a key equipment in hydrogen peroxide production. In the hydrogen peroxide production process, the working fluid dehydration equipment is generally called a flash tank, which is mainly used in the fixed bed palladium catalyst hydrogen peroxide production process.

[0003] At present, the flash tank is a simple branched tube distribution, and uses fillers to separate gas and liquid. This method has the following disadvantages:

[0004] 1. The structure of the branch distribution pipe is too simple, the liquid distribution cannot be uniform, and the equipment efficiency is low;

[0005] 2. The branched distribution state is large droplets or even small continuous liquid columns, which greatly affects the overall vaporization effect, and a large amount of water and hydrogen peroxide enters the bottom working liquid;

[0006] 3. The efficiency of the filler will continue to decline over time, making it difficult to meet the needs of continuous production.

[0007] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0008] In view of the problems in the related art, the purpose of the utility model is to provide a flash dehydration equipment for producing hydrogen peroxide by anthraquinone method with high efficiency, so as to overcome the above technical problems existing in the existing related art.

[0009] The technical solution of the utility model is achieved in this way:

[0010] A flash dehydration device for producing hydrogen peroxide using anthraquinone method, comprising: a flash tank body with a negative pressure cavity, the flash tank body being provided with a liquid inlet and a liquid outlet, the liquid inlet being located at the top of the flash tank body, the liquid outlet being located at the bottom of the flash tank body, and a vacuum air inlet being provided at one side of the liquid inlet at the top of the flash tank body, a liquid blocking filter plate being provided in the vacuum air inlet, wherein;

[0011] The liquid inlet extends into the flash tank body and is connected to a vertically arranged flow guide pipe, the bottom end of the flow guide pipe is respectively connected to branch distribution pipes on both sides, the branch distribution pipes are respectively connected to a plurality of mist pipes on both sides, the bottom end of the mist pipe is connected to a nozzle, the flow guide pipe is located at the top end of the branch distribution pipe and is sleeved with a tower plate, the tower plate is provided with a plurality of filtrate holes and a plurality of air riser holes.

[0012] Furthermore, the bottom end of the flash tank body is an arc-shaped structure, and the liquid outlet is located in the middle of the arc.

[0013] Furthermore, the branch distribution pipes are horizontally symmetrically arranged on both sides of the guide pipe.

[0014] Furthermore, the mist pipes are horizontally arranged on both sides of the branch distribution pipes.

[0015] Furthermore, the output end of the nozzle faces the liquid outlet.

[0016] Furthermore, the tower plate is a disc-shaped structure, and a plurality of the filtrate holes are arranged in a ring shape.

[0017] Furthermore, the liquid-blocking filter plate has a conical structure.

[0018] Beneficial effects of the utility model:

[0019] The utility model extends a vertically arranged flow guide pipe into the flash tank body through a liquid inlet, and the two sides of the bottom end of the flow guide pipe are respectively connected to branch distribution pipes, and the two sides of the branch distribution pipes are respectively connected to a plurality of mist pipes, and the bottom ends of the mist pipes are connected to nozzles, so that the liquid is more evenly distributed, and at the same time, the traditional filler is removed, and the nozzle is added to the branch distribution pipe, so that the liquid can form a mist effect well when entering, improve the vaporization efficiency, and separate the water and hydrogen peroxide components in the working liquid to a greater extent;

[0020] In addition, the utility model is provided with a tower plate at the top end of the branch distribution pipe through a guide pipe, and the tower plate is provided with a plurality of filtrate holes and a plurality of air riser holes, so that the liquid enters and is distributed from the bottom of the tower plate to complete vaporization, and then vacuum air is extracted from the upper part of the tower plate in cooperation with the vacuum air inlet, and the vacuum air is extracted from the air riser holes. The liquid hits the tower plate and is condensed through the filtrate holes and then is completely isolated, which plays a good role in gas-liquid separation. At the same time, a small part of the liquid is isolated again through the liquid retaining filter plate, thereby further improving the gas-liquid separation effect.

[0021] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic structural diagram of a flash dehydration device for producing hydrogen peroxide using an anthraquinone method according to an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the branch distribution pipe structure of the flash dehydration equipment for producing hydrogen peroxide using the high-efficiency anthraquinone method according to the embodiment of the utility model;

[0026] Figure 3 The present invention is a schematic diagram of the tower plate structure of a flash dehydration device for producing hydrogen peroxide using an anthraquinone method according to an embodiment of the present invention.

[0027] In the figure:

[0028] 1. Flash tank body; 2. Liquid inlet; 3. Liquid outlet; 4. Draft tube; 5. Branched distribution pipe; 6. Mist pipe; 7. Nozzle; 8. Tower plate; 9. Filtrate hole; 10. Air riser hole; 11. Vacuum inlet; 12. Liquid retaining filter plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0030] According to an embodiment of the utility model, a flash dehydration device for producing hydrogen peroxide using an anthraquinone process with high efficiency is provided.

[0031] like Figure 1-Figure 3 As shown, a flash dehydration device for producing hydrogen peroxide by anthraquinone method with high efficiency comprises: a flash tank body 1 with a negative pressure cavity, the flash tank body 1 is provided with a liquid inlet 2 and a liquid outlet 3, the liquid inlet 2 is located at the top of the flash tank body 1, the liquid outlet 3 is located at the bottom of the flash tank body 1, and a vacuum air inlet 11 is provided at one side of the liquid inlet 2 at the top of the flash tank body 1, and a liquid blocking filter plate 12 is provided in the vacuum air inlet 11, wherein;

[0032] The liquid inlet 2 extends into the flash tank body 1 and is connected to a vertically arranged guide pipe 4, the bottom end of the guide pipe 4 is respectively connected to branch distribution pipes 5 on both sides, the branch distribution pipes 5 are respectively connected to a plurality of mist pipes 6 on both sides, the bottom of the mist pipes 6 is connected to a nozzle 7, the guide pipe 4 and the top end of the branch distribution pipe 5 are sleeved with a tower plate 8, the tower plate 8 is provided with a plurality of filtrate holes 9 and a plurality of air riser holes 10.

[0033] In addition, the bottom end of the flash tank body 1 is an arc-shaped structure, and the liquid outlet 3 is located in the middle of the arc.

[0034] In addition, the branch distribution pipes 5 are horizontally and symmetrically arranged on both sides of the flow guide pipe 4. The mist pipes 6 are horizontally arranged on both sides of the branch distribution pipes 5. The output end of the nozzle 7 faces the liquid outlet 3.

[0035] In addition, the tower tray 8 is a disc-shaped structure, and a plurality of filtrate holes 9 are arranged in a ring shape.

[0036] In addition, the liquid-blocking filter plate 12 has a conical structure.

[0037] With the aid of the above technical solution, a vertically arranged flow guide pipe 4 is extended into the flash tank body 1 through the liquid inlet 2, and the two sides of the bottom end of the flow guide pipe 4 are respectively connected to branch distribution pipes 5, and the two sides of the branch distribution pipes 5 are respectively connected to a plurality of mist pipes 6, and the bottom end of the mist pipe 6 is connected to a nozzle 7, so that the liquid distribution is more uniform, and at the same time, the traditional filler is removed, and the nozzle 7 is installed on the branch distribution pipe 5, so that the liquid can form a mist effect well when entering, improve the vaporization efficiency, and separate the water and hydrogen peroxide components in the working liquid to a greater extent;

[0038] In addition, the utility model is provided with a tower plate 8 at the top end of the branch distribution pipe 5 through the guide pipe 4, and the tower plate 8 is provided with a plurality of filtrate holes 9 and a plurality of air riser holes 10, so that the liquid enters and is distributed from the bottom of the tower plate 8 to complete vaporization, and then vacuum air is extracted from the upper part of the tower plate 8 in cooperation with the vacuum air inlet 11, and the vacuum air is extracted from the air riser holes 10. The liquid hits the tower plate 8 and is completely isolated after condensing through the filtrate holes 9, which plays a good role in gas-liquid separation. At the same time, a small part of the liquid is isolated again through the liquid blocking filter plate 12, thereby further improving the gas-liquid separation effect.

[0039] In this technical solution, the diameter of the flash tank body 1 is determined according to production requirements, and the flash tank body 1 is supported by ear seats and supported on the production floor.

[0040] Specifically, the working liquid coming out of the extraction tower (not shown in the figure) enters the flash tank 1 after the free water is removed by the working liquid coalescer (not shown in the figure). At this time, the working liquid contains working liquid, trace hydrogen peroxide, a small amount of pure water and dissolved non-condensable gas. As the circulating medium for hydrogen peroxide production, the working liquid needs to be free of impurities before entering the circulation, in order to remove impurities (hydrogen peroxide and pure water, dissolved non-condensable gas) in the working liquid.

[0041] The working liquid enters from the liquid inlet 2 at the top of the flash tank 1, flows to the branch distribution pipe 5 and the mist pipe 6 through the guide pipe 4, and is evenly distributed in the entire cross section. A nozzle 7 of a specific type is welded at the bottom of the mist pipe 6. The spacing between the nozzles 7 is determined by the characteristic mist angle, coverage, etc. of the nozzle 7. Under the action of the nozzle 7, the working liquid forms a mist distribution.

[0042] In addition, the flash tank 1 operates under negative pressure, and under the effect of negative pressure, the boiling points of hydrogen peroxide and pure water are reduced. The working liquid has a high boiling point and does not vaporize in this environment. Its droplets fall and gather at the bottom of the flash tank 1 to form a working liquid without impurities, and pass through the bottom liquid outlet 3 for the next production cycle; hydrogen peroxide and pure water have reached the boiling point at an operating temperature of 55°C due to the negative pressure environment, and are in a steam state. Then, through the vacuum inlet 11 of the top head, the vaporized hydrogen peroxide vapor, pure water vapor and non-condensable gas are pumped away and enter the next process.

[0043] In addition, in order to prevent the vacuum gas from carrying part of the liquid and ensure the operation effect of the next process, a layer of tower tray 8 is installed above the branch distribution pipe 5. This layer plays the role of isolating liquid droplets. After encountering the tower tray 8, the small droplets of working liquid that are drawn out by the negative pressure condense into large droplets through the filtrate holes 9 and fall to the bottom, thus preventing the vacuum gas from carrying the working liquid droplets. The several air riser holes 10 on the tower tray are channels for gas circulation.

[0044] In addition, a conical liquid-blocking filter plate 12 is added to the inlet end of the vacuum air inlet 11, which also plays a role in isolating the liquid and ensures that there is no liquid in the vacuum air.

[0045] In summary, with the aid of the above technical solution of the utility model, the following effects can be achieved: a vertically arranged flow guide pipe 4 is extended into the flash tank body 1 through the liquid inlet 2, and the two sides of the bottom end of the flow guide pipe 4 are respectively connected to branch distribution pipes 5, and the two sides of the branch distribution pipes 5 are respectively connected to a plurality of mist pipes 6, and the bottom end of the mist pipe 6 is connected to a nozzle 7, so that the liquid distribution is more uniform, and at the same time, the traditional filler is removed, and the nozzle 7 is installed on the branch distribution pipe 5, so that the liquid can form a mist effect well when entering, improve the vaporization efficiency, and separate the water and hydrogen peroxide components in the working liquid to a greater extent;

[0046] In addition, the utility model is provided with a tower plate 8 at the top end of the branch distribution pipe 5 through the guide pipe 4, and the tower plate 8 is provided with a plurality of filtrate holes 9 and a plurality of air riser holes 10, so that the liquid enters and is distributed from the bottom of the tower plate 8 to complete vaporization, and then vacuum air is extracted from the upper part of the tower plate 8 in cooperation with the vacuum air inlet 11, and the vacuum air is extracted from the air riser holes 10. The liquid hits the tower plate 8 and is completely isolated after condensing through the filtrate holes 9, which plays a good role in gas-liquid separation. At the same time, a small part of the liquid is isolated again through the liquid blocking filter plate 12, thereby further improving the gas-liquid separation effect.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flash dehydration equipment for producing hydrogen peroxide by anthraquinone method, characterized in that: include: A flash tank body (1) presenting a negative pressure cavity, the flash tank body (1) being provided with a liquid inlet (2) and a liquid outlet (3), the liquid inlet (2) being located at the top end of the flash tank body (1), the liquid outlet (3) being located at the bottom end of the flash tank body (1), and a vacuum air inlet (11) being provided at the top end of the flash tank body (1) and on one side of the liquid inlet (2), a liquid blocking filter plate (12) being provided in the vacuum air inlet (11), wherein; The liquid inlet (2) extends into the flash tank body (1) and is connected to a vertically arranged flow guide pipe (4). The two sides of the bottom end of the flow guide pipe (4) are respectively connected to branch distribution pipes (5). The two sides of the branch distribution pipes (5) are respectively connected to a plurality of mist pipes (6). The bottom ends of the mist pipes (6) are connected to nozzles (7). The flow guide pipe (4) is provided with a tower plate (8) at the top end of the branch distribution pipes (5). The tower plate (8) is provided with a plurality of filtrate holes (9) and a plurality of air riser holes (10).

2. The flash dehydration equipment for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: The bottom end of the flash tank body (1) is an arc-shaped structure, and the liquid outlet (3) is located in the middle of the arc.

3. The flash dehydration equipment for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: The branch distribution pipes (5) are horizontally symmetrically arranged on both sides of the flow guide pipe (4).

4. The flash dehydration equipment for producing hydrogen peroxide by anthraquinone method according to claim 3, characterized in that: The mist pipe (6) is horizontally arranged on both sides of the branch distribution pipe (5).

5. The flash dehydration equipment for producing hydrogen peroxide by anthraquinone method according to claim 4, characterized in that: The output end of the nozzle (7) faces the liquid outlet (3).

6. The flash dehydration equipment for producing hydrogen peroxide by anthraquinone method according to claim 1, characterized in that: The tower plate (8) is a disc-shaped structure, and the plurality of filtrate holes (9) are arranged in a ring shape.

7. The flash dehydration equipment for producing hydrogen peroxide by anthraquinone method according to claim 6, characterized in that: The liquid-blocking filter plate (12) has a conical structure.

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