Hydrogen peroxide working solution purification system

Abstract

The utility model discloses a hydrogen peroxide working solution purification system which is characterized in that firstly, a part of moisture content in a working solution is removed through an efficient coalescer, secondly, 90% of the working solution enters a vacuum dehydrator through metering of a liquid meter and control of an automatic control valve, and the moisture content in the working solution is removed again. The rest 10% of the working solution enters the alkali washing unit and then is collected to enter the post-treatment carclazyte bed, the acidity of the working solution entering the post-treatment carclazyte bed is reduced, the service time of activated aluminum oxide can be prolonged, the moisture content in the working solution is further removed through the post-treatment carclazyte bed, and degradation products in the working solution are adsorbed and regenerated; finally, the working solution enters the filtering unit to be filtered again, residual impurities and degradation products in the working solution are removed, and the purification operation of the working solution is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen peroxide preparation, in particular to a hydrogen peroxide working fluid purification system. Background Art

[0002] In the anthraquinone method of hydrogen peroxide production process, in the hydrogenation process of anthraquinone, in addition to the symmetrical hydrogenation of the hydroxyl group, asymmetrical hydrogenation and even aromatic ring hydrogenation will also occur. Except for tetrahydroanthraquinone, these hydrogenation products cannot produce hydrogen peroxide through cyclic hydrogenation, oxidation, extraction and purification, or the speed of producing hydrogen peroxide is extremely slow, resulting in the loss of anthraquinone. These hydrogenation products are collectively referred to as degradation products. The presence of degradation products has an impact on the physical properties of the working liquid, such as reducing the interfacial tension, making the extraction tower prone to flooding, making it difficult for the working liquid to condense in the extraction tower, causing the raffinate to carry water; the viscosity of the working liquid increases, the flow resistance increases, affecting the separation of the extraction tower; the density of the working liquid increases, reducing the density difference with water, and making it difficult for the working liquid to float in the extraction tower.

[0003] The prior art with patent number CN215249576U discloses a device for preparing hydrogen peroxide, which, through a post-processing process, causes most of the raffinate flowing out of the top of the extraction tower to enter the clay bed for regeneration after agglomeration separation and vacuum dehydration, and a small part of the raffinate is alkali washed and regenerated, and finally returned to the fixed bed hydrogenation reactor for recycling, ensuring safe production, and the alkali washing process can increase the effective anthraquinone content to a certain extent. However, there is a lack of measurement and control of the pH value inside the system, and as the acidity in the system continues to increase during the production process, it will cause problems such as accelerated failure of activated alumina, poor reaction conditions of the hydrogenation tower, and a short regeneration cycle of the palladium catalyst. Summary of the invention

[0004] The utility model aims to solve at least one of the above-mentioned technical problems and provides a hydrogen peroxide working fluid purification system, which can effectively purify the working fluid and simultaneously regulate the pH value of the system.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A hydrogen peroxide working fluid purification system comprises a high-efficiency coalescer, whose input end is connected to the working fluid output end of a hydrogen peroxide production system and is used for performing a primary dehydration treatment on the working fluid; a vacuum dehydrator, on which a dehydration input pipe is provided, the dehydration input pipe is connected to the output end of the high-efficiency coalescer and is used for performing a secondary dehydration treatment on the working fluid; an alkali washing unit, on which an alkali washing input pipe is provided, the alkali washing input pipe is connected to the output end of the high-efficiency coalescer and is used for performing an alkali washing treatment on the working fluid; a post-treatment clay bed, whose input ends are both connected to the vacuum dehydrator and the output ends of the alkali washing unit and are used for adsorption treatment on the working fluid; a filtering unit, whose input end is connected to the output end of the post-treatment clay bed; a control system, wherein a first flowmeter and a first automatic liquid inlet control valve are provided on the dehydration input pipe, and the control system can control the opening or closing of the first automatic liquid inlet control valve according to the flow value monitored by the first flowmeter, and a second flowmeter and a second automatic liquid inlet control valve are provided on the alkali washing input pipe, and the control system can control the opening or closing of the second automatic liquid inlet control valve according to the flow value monitored by the second flowmeter.

[0007] As an improvement of the above technical solution, the input end of the post-treatment clay bed is connected to a working liquid collecting tank, and the output ends of the vacuum dehydrator and the water washing tower are both connected to the working liquid collecting tank.

[0008] As an improvement of the above technical solution, a Ph meter is provided on the working liquid collection tank, and automatic liquid outlet control valves are provided on the output ends of the vacuum dehydrator and the alkali washing unit. The control system can control the opening or closing of the two groups of automatic liquid outlet control valves respectively according to the Ph value monitored by the Ph meter.

[0009] As an improvement of the above technical solution, the alkali washing unit includes an alkali washing tower, a pickling tower and a water washing tower. The alkali washing input pipe is arranged on the alkali washing tower. The input end of the pickling tower is connected to the output end of the alkali washing tower. The input end of the water washing tower is connected to the output end of the pickling tower. The output end of the water washing tower is connected to the input end of the working liquid collecting tank.

[0010] As an improvement of the above technical solution, the filtration unit includes a circulating working fluid storage tank and a filter, the input end of the circulating working fluid storage tank is connected to the output end of the post-treatment white clay bed, and the input end of the filter is connected to the output end of the circulating working fluid storage tank through a diaphragm pump.

[0011] As an improvement of the above technical solution, the control system includes a central processing unit and a controller electrically connected to each other, the first flow meter and the second flow meter are both electrically connected to the central processing unit, the first automatic liquid inlet control valve, the second automatic liquid inlet control valve and the two groups of automatic liquid outlet control valves are all electrically connected to the controller, the central processing unit can receive the flow value sent by the first flow meter, the second flow meter and the Ph meter, and compare the flow value and the Ph value with the internally preset flow threshold and Ph threshold, the controller can receive the comparison result signal sent by the central processing unit, and control the opening or closing of the first automatic liquid inlet control valve, the second automatic liquid inlet control valve and the two groups of automatic liquid outlet control valves according to the comparison result.

[0012] As an improvement of the above technical solution, manual control valves are provided on the dehydration input pipe, the alkali washing input pipe, the output end of the vacuum dehydrator and the output end of the alkali washing unit.

[0013] As an improvement of the above technical solution, a stirring mechanism is provided inside the working fluid collecting tank and the circulating working fluid storage tank.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] The utility model discloses a hydrogen peroxide working fluid purification system. Firstly, a part of the water content in the working fluid is removed by a high-efficiency coalescer. Secondly, 90% of the working fluid enters a vacuum dehydrator to remove the water content in the working fluid again by measuring with a liquid meter and controlling with an automatic control valve. The remaining 10% of the working fluid enters an alkali washing unit and then is collected and enters a post-treatment clay bed. The acidity of the working fluid entering the post-treatment clay bed is reduced, so that the service life of the activated alumina can be prolonged. The post-treatment clay bed further removes the water content in the working fluid and adsorbs and regenerates the degradation product content in the working fluid. Finally, the working fluid enters a filtering unit to be filtered again to remove the remaining impurities and degradation products in the working fluid, thereby completing the purification operation of the working fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 The system structure of the embodiment of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 The system structure of the embodiment of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 3 It is a working flow chart of the control system in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] 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 of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is referred to as being "set in the middle", it does not only mean being set in the middle, as long as it is not set at both ends within the range defined by the middle. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] like Figures 1 to 3As shown, the utility model provides a hydrogen peroxide working fluid purification system, including a high-efficiency coalescer 10, whose input end is connected to the working fluid output end of the hydrogen peroxide production system, and is used for performing a primary dehydration treatment on the working fluid; a vacuum dehydrator 20, on which a dehydration input pipe 21 is provided, and the dehydration input pipe 21 is connected to the output end of the high-efficiency coalescer 10, and is used for performing a secondary dehydration treatment on the working fluid; an alkali washing unit 30, on which an alkali washing input pipe 31 is provided, and the alkali washing input pipe 31 is connected to the output end of the high-efficiency coalescer 10, and is used for performing an alkali washing treatment on the working fluid; a post-treatment clay bed 40, whose input ends are both connected to the vacuum dehydrator 20 and the alkali washing unit 30 The output end is used to adsorb the working fluid in the raw treatment; the filter unit 50, whose input end is connected to the output end of the post-treatment clay bed 40; the control system 60, the dehydration input pipe 21 is provided with a first flow meter 22 and a first automatic liquid inlet control valve 23, the control system 60 can control the opening or closing of the first automatic liquid inlet control valve 23 according to the flow value monitored by the first flow meter 22, the alkali washing input pipe 31 is provided with a second flow meter 32 and a second automatic liquid inlet control valve 33, the control system 60 can control the opening or closing of the second automatic liquid inlet control valve 33 according to the flow value monitored by the second flow meter 32. Among them, the high-efficiency coalescer 10, the vacuum dehydrator 20 and the post-treatment clay bed 40 are all prior art and will not be described in detail in this application. This system is connected to a hydrogen peroxide production system. The working liquid from the extraction tower of the hydrogen peroxide production system is input into a high-efficiency coalescer 10 for dehydration treatment. After dehydration, about 10% of the working liquid flow enters an alkali washing unit 30, and the remaining working liquid enters a vacuum dehydrator 20 for further dehydration. The working liquid output from the alkali washing unit 30 is mixed with the working liquid output from the vacuum dehydrator 20, and the pH value of the mixed liquid is about 3.8, and then enters a post-treatment clay bed for subsequent treatment.

[0024] See also Figure 2 In order to mix the working liquid output from the alkali washing unit 30 and the vacuum dehydrator 20 before entering the post-treatment clay bed 40, and to further facilitate the determination of the Ph value of the mixed working liquid, the input end of the post-treatment clay bed 40 is connected to a working liquid collecting tank 41, and the output ends of the vacuum dehydrator 20 and the water washing tower 34 are both connected to the working liquid collecting tank 41. Specifically, a Ph meter 42 is provided on the working liquid collecting tank 41, and automatic liquid outlet control valves are provided on the output ends of the vacuum dehydrator 20 and the alkali washing unit 30. The control system 60 can control the opening or closing of the two groups of automatic liquid outlet control valves according to the Ph value monitored by the Ph meter 42.

[0025] In a specific embodiment of the present application, the alkali washing unit 30 includes an alkali washing tower 34, an acid washing tower 35 and a water washing tower 36, the alkali washing input pipe 31 is arranged on the alkali washing tower 34, the input end of the acid washing tower 35 is connected to the output end of the alkali washing tower 34, the input end of the water washing tower 36 is connected to the output end of the acid washing tower 35, and the output end of the water washing tower 36 is connected to the input end of the working liquid collecting tank 41. The alkali washing tower 34, the acid washing tower 35 and the water washing tower 36 are respectively provided with an alkali liquid input pipe, an acid liquid input pipe and a pure water input pipe to clean the working liquid. The alkali washing unit 30 can perform uninterrupted alkali washing operation, and has a large processing capacity, which can ensure the stability of the system.

[0026] The filtering unit 50 includes a circulating working fluid storage tank 51 and a filter 52. The input end of the circulating working fluid storage tank 51 is connected to the output end of the post-treatment clay bed 40, and the input end of the filter 52 is connected to the output end of the circulating working fluid storage tank 51 through a diaphragm pump 53. The filter 52 can filter out the remaining impurities and degradation products in the working fluid, and the working fluid treated by the filter 52 can be input into the hydrogen peroxide production system for recycling. To facilitate mixing of the working fluid, a stirring mechanism is provided inside the working fluid collection tank 41 and the circulating working fluid storage tank 51, such as an automatic stirring rod can be provided at the bottom of the tank.

[0027] See also Figure 3 The control system 60 includes a central processor 61 and a controller 62 which are electrically connected to each other. The first flow meter 22 and the second flow meter 32 are both electrically connected to the central processor 61. The first automatic liquid inlet control valve 23, the second automatic liquid inlet control valve 33 and the two groups of automatic liquid outlet control valves are all electrically connected to the controller 62. The central processor 61 can receive the flow value sent by the first flow meter 22, the second flow meter 32 and the Ph meter 42, and compare the flow value and the Ph value with the internal preset flow threshold and Ph threshold. The controller 62 can receive the comparison result signal sent by the central processor 61, and control the opening or closing of the first automatic liquid inlet control valve 23, the second automatic liquid inlet control valve 33 and the two groups of automatic liquid outlet control valves according to the comparison result. For the convenience of manual control, manual control valves are provided on the dehydration input pipe 21, the alkali washing input pipe 31, the output end of the vacuum dehydrator 20 and the output end of the alkali washing unit 30.

[0028] The utility model discloses a hydrogen peroxide working fluid purification system. Firstly, a part of the water content in the working fluid is removed by a high-efficiency coalescer 10. Secondly, 90% of the working fluid enters a vacuum dehydrator 20 to remove the water content in the working fluid again by measuring with a liquid meter and controlling with an automatic control valve. The remaining 10% of the working fluid enters an alkali washing unit 30 and then is collected and enters a post-treatment clay bed 40. The acidity of the working fluid entering the post-treatment clay bed 40 is reduced, which can extend the service life of the activated alumina. The post-treatment clay bed 40 further removes the water content in the working fluid and adsorbs and regenerates the degradation product content in the working fluid. Finally, the working fluid enters a filtering unit 50 to be filtered again to remove the remaining impurities and degradation products in the working fluid, thereby completing the purification operation of the working fluid.

[0029] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. Any modification or equivalent substitution that does not deviate from the spirit and scope of the utility model shall be included in the scope of the technical solution of the utility model.

Claims

1. A hydrogen peroxide working fluid purification system, characterized in that: include A high-efficiency coalescer, whose input end is connected to the working fluid output end of the hydrogen peroxide production system, is used to perform a primary dehydration treatment on the working fluid; A vacuum dehydrator, on which a dehydration input pipe is provided, the dehydration input pipe is connected to the output end of the high-efficiency coalescer, and is used for performing secondary dehydration treatment on the working fluid; An alkali washing unit is provided with an alkali washing input pipe, the alkali washing input pipe is connected to the output end of the high-efficiency coalescer and is used for alkali washing the working fluid; The post-treatment clay bed has its input ends connected to the output ends of the vacuum dehydrator and the alkali washing unit, and is used for adsorbing and treating the working fluid; A filter unit, the input end of which is connected to the output end of the post-processing clay bed; A control system, wherein a first flow meter and a first automatic liquid inlet control valve are provided on the dehydration input pipe, and the control system can control the opening or closing of the first automatic liquid inlet control valve according to the flow value monitored by the first flow meter; a second flow meter and a second automatic liquid inlet control valve are provided on the alkali washing input pipe, and the control system can control the opening or closing of the second automatic liquid inlet control valve according to the flow value monitored by the second flow meter.

2. A hydrogen peroxide working fluid purification system according to claim 1, characterized in that: The input end of the post-treatment clay bed is connected to a working liquid collecting tank, and the output ends of the vacuum dehydrator and the water washing tower are both connected to the working liquid collecting tank.

3. A hydrogen peroxide working fluid purification system according to claim 2, characterized in that: A Ph meter is provided on the working liquid collecting tank, and automatic liquid outlet control valves are provided on the output ends of the vacuum dehydrator and the alkali washing unit. The control system can control the opening or closing of the two groups of automatic liquid outlet control valves according to the Ph value monitored by the Ph meter.

4. A hydrogen peroxide working fluid purification system according to claim 2, characterized in that: The alkali washing unit comprises an alkali washing tower, an acid washing tower and a water washing tower. The alkali washing input pipe is arranged on the alkali washing tower. The input end of the acid washing tower is connected to the output end of the alkali washing tower. The input end of the water washing tower is connected to the output end of the acid washing tower. The output end of the water washing tower is connected to the input end of the working liquid collecting tank.

5. A hydrogen peroxide working fluid purification system according to claim 2, characterized in that: The filtration unit comprises a circulating working fluid storage tank and a filter, the input end of the circulating working fluid storage tank is connected to the output end of the post-processing clay bed, and the input end of the filter is connected to the output end of the circulating working fluid storage tank through a diaphragm pump.

6. A hydrogen peroxide working fluid purification system according to claim 3, characterized in that: The control system includes a central processing unit and a controller electrically connected to each other, the first flow meter and the second flow meter are both electrically connected to the central processing unit, the first automatic liquid inlet control valve, the second automatic liquid inlet control valve and the two groups of automatic liquid outlet control valves are all electrically connected to the controller, the central processing unit can receive the flow value sent by the first flow meter, the second flow meter and the Ph meter, and compare the flow value and the Ph value with the internally preset flow threshold and Ph threshold, the controller can receive the comparison result signal sent by the central processing unit, and control the opening or closing of the first automatic liquid inlet control valve, the second automatic liquid inlet control valve and the two groups of automatic liquid outlet control valves according to the comparison result.

7. A hydrogen peroxide working fluid purification system according to claim 1, characterized in that: Manual control valves are arranged on the dehydration input pipe, the alkali washing input pipe, the output end of the vacuum dehydrator and the output end of the alkali washing unit.

8. A hydrogen peroxide working fluid purification system according to claim 5, characterized in that: A stirring mechanism is provided inside the working fluid collecting tank and the circulating working fluid storage tank.

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