CN220589015U - System for purifying hydrogen peroxide - Google Patents

Abstract

The utility model relates to the technical field of hydrogen peroxide production equipment, and discloses a system for purifying hydrogen peroxide. The system comprises a circulation unit, a mixing unit and a separation unit, wherein the circulation unit comprises a first tank and a first pump; the mixing unit comprises at least one centrifugal extractor, the centrifugal extractor comprises a shell and an extraction mechanism, a solvent outlet is arranged on the shell, and the solvent outlet is communicated with the first groove through a pipeline; the separation unit comprises at least one oil-water separator, the oil-water separator comprises a cylinder, a water inlet distribution area, a coalescence area and a separation area are sequentially arranged in the cylinder along the flow moving direction, the coalescence area is provided with a coalescence filter element, and the coalescence filter element is provided with a differential pressure transmitter. The utility model performs forced mixing and extraction separation by the centrifugal extractor, enhances the mass transfer effect, and can perform two-stage separation and purification on crude hydrogen peroxide by arranging the coalescing filter element in the oil-water separator, thereby solving the problem of poor separation and purification effect.

Description

System for purifying hydrogen peroxide

Technical Field

The utility model relates to the technical field of hydrogen peroxide production equipment, in particular to a system for purifying hydrogen peroxide.

Background

Hydrogen peroxide has a strong oxidizing power and its decomposition products are harmless. Hydrogen peroxide is therefore used as an oxidizing agent, as a bleaching agent for threads or wool, and as a catalyst for vinyl polymerization in the plastics industry. In addition to the above uses, hydrogen peroxide is also an important raw material for products such as caprolactam, propylene oxide, lithium iron phosphate batteries, and the like. Hydrogen peroxide having a low total organic carbon content is required for the aforementioned applications. Thus, the purification of hydrogen peroxide plays an important role.

At present, the common hydrogen peroxide purification and purification technology mainly comprises a rectification method, an ion exchange resin method, a membrane separation method, a solvent extraction method, an adsorption method, a crystallization method and the like. The solvent extraction method has simple operation, low energy consumption and unlimited yield, the working solution can be used as an extractant, and the extractant can be liquid, but the product quality is poor, so the method is generally used for the pretreatment of the crude hydrogen peroxide product.

However, when the solvent extraction method is adopted to purify hydrogen peroxide in the prior art, the traditional dispersion purifying tower is generally adopted, and the device has the problems of poor mass transfer effect and poor separation and purification effect, and even if the device is used for purifying crude hydrogen peroxide, the device can not meet the application requirements.

Disclosure of Invention

The utility model aims to solve the problems of poor mass transfer effect and poor separation and purification effect of equipment for purifying hydrogen peroxide in the prior art.

In order to achieve the above object, the present utility model provides a system for purifying hydrogen peroxide, the system comprising:

a circulation unit including a first tank for containing a solvent and a first pump for pumping the solvent into the mixing unit;

the mixing unit comprises at least one centrifugal extractor, the centrifugal extractor comprises a shell and an extraction mechanism arranged in the shell, the centrifugal extractor is used for forcedly mixing a solvent from the first tank and crude hydrogen peroxide from a purifying tower or an extraction tower and extracting and separating a mixture flow, a solvent outlet I is arranged on the shell, and the solvent outlet I is communicated with the first tank through a pipeline;

the separation unit comprises at least one oil-water separator, the oil-water separator is used for separating the material flow extracted and separated by the mixing unit into two stages, the oil-water separator comprises a cylinder body, a water inlet distribution area, a coalescence area and a separation area are sequentially arranged in the cylinder body along the moving direction of the material flow, the coalescence area is provided with a coalescence filter element, a differential pressure transmitter is arranged on the coalescence filter element, and the differential pressure transmitter is used for monitoring the pressure difference between an inlet and an outlet of the coalescence filter element.

Preferably, the separation unit comprises two oil-water separators connected in series, the oil-water separators further comprise a liquid inlet, a tube plate, an oil collecting chamber, a drain outlet and a liquid outlet, the tube plate is arranged inside the cylinder in the radial direction of the cylinder, the opening edge of the tube plate is in circumferential sealing connection with the side wall of the cylinder so as to separate the water inlet distribution area from the coalescence area, the liquid inlet is positioned at the upper part of the cylinder in the water inlet distribution area, and the oil collecting chamber and the liquid outlet are respectively arranged at the upper part and the lower part of the cylinder in the separation area.

Preferably, the top of the oil collecting chamber is provided with a solvent outlet II connected with the first groove through a pipeline, a first self-control valve is arranged on a connecting pipeline of the solvent outlet II and the first groove, a first liquid level meter is arranged in the oil collecting chamber and is in communication connection with the first self-control valve, and the first liquid level meter is used for detecting the liquid level height in the oil collecting chamber and sending a liquid level height value to the first self-control valve so as to control the opening and closing of the first self-control valve.

More preferably, the oil-water separator comprises a plurality of coalescing filter elements, the number and the size of the holes in the tube plate are arranged corresponding to the first end openings of the coalescing filter elements, and the coalescing filter elements are respectively arranged in parallel with the cylinder body in the axial direction at uniform intervals.

Preferably, the cylinder is of a horizontal cylinder structure.

Preferably, the oil-water separator further comprises a fluid distributor, wherein the fluid distributor is radially arranged in the water inlet distribution area along the cylinder body and is close to the tube plate; the edge of the fluid distributor is in circumferential sealing connection with the side wall of the cylinder.

Preferably, the inside of casing is provided with first chamber and the second chamber of collecting, the lateral wall in first chamber of collecting is provided with first commodity circulation export, first commodity circulation export with the inlet passes through the pipeline intercommunication, be provided with first weir plate in the first chamber of collecting, the solvent export set up in the lateral wall in second chamber of collecting, the inside second weir plate that is provided with of second chamber of collecting, solvent import and crude hydrogen peroxide import have been seted up respectively to the lower part of casing, solvent import with crude hydrogen peroxide import is located respectively the both sides of casing.

Preferably, the bottom of the housing is provided with a vortex disk for forced mixing of solvent and crude hydrogen peroxide.

More preferably, the extraction mechanism comprises a rotary drum and a transmission shaft, the transmission shaft is inserted into the shell from the top end of the shell in a center jacking manner, a flow baffle plate is arranged at the bottom end of the transmission shaft, and the rotary drum performs circumferential rotation motion around the central axis of the rotary drum under the driving action of the transmission shaft so as to realize centrifugal separation of the hydrogen peroxide and the solvent.

Preferably, a first pressure gauge and a flow meter are further arranged between the first pump and the mixing unit in sequence.

Preferably, a second liquid level meter for detecting the liquid level height in the first tank is arranged in the first tank.

Through the technical scheme, the system for purifying the hydrogen peroxide has the following beneficial effects:

(1) The utility model carries out forced mixing and extraction separation by the centrifugal extractor, enhances the mass transfer effect, and can carry out two-stage separation and purification on crude hydrogen peroxide by arranging the coalescing filter element in the oil-water separator, thereby solving the problem of poor separation and purification effect, and the total organic carbon can be reduced to below 100 mg/L.

(2) The solvent can be recycled, so that the method is environment-friendly; and, through setting up differential pressure transmitter on the coalescence filter core, can monitor the pressure differential of the entry and the export of coalescence filter core to can in time change the coalescence filter core, improve the purification effect.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic diagram of a system for purifying hydrogen peroxide in accordance with one embodiment of the present utility model;

FIG. 2 is a schematic diagram of the configuration of an oil-water separator in a system for purifying hydrogen peroxide in accordance with one embodiment of the present utility model;

fig. 3 is a schematic diagram of the structure of a mixing unit in a system for purifying hydrogen peroxide according to an embodiment of the present utility model.

Description of the reference numerals

100. Circulation unit 101, first tank

102. First pump 200, mixing unit

201. Housing 2011, solvent outlet I

2012. First collection chamber 2013, second collection chamber

2014. A first flow outlet 2015, a first weir plate

2016. A second weir 2017, a solvent inlet

2018. Crude hydrogen peroxide inlet 202, vortex disk

203. Drum 204, drive shaft

205. Baffle 300 and separation unit

301. Oil-water separator 3011 and cylinder

3012. Coalescing filter element 3013 and differential pressure transmitter

3014. Liquid inlet 3015 and oil collecting chamber

3016. Drain 3017 and liquid outlet

3018. Solvent outlet II 3019, first level gauge

3020. First self-control valve 3021 and fluid dispenser

400. First pressure gauge 500, flowmeter

600. Second level gauge 700, first valve

800. Second valve I, water inlet distribution area

II. Coalescence zone III, separation zone

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.

The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.

As previously described, the present utility model provides a system for purifying hydrogen peroxide, as shown in fig. 1, 2, and 3, comprising:

a circulation unit 100 including a first tank 101 for containing a solvent and a first pump 102 for pumping the solvent into the mixing unit 200;

a mixing unit 200, which comprises at least one centrifugal extractor, wherein the centrifugal extractor comprises a shell 201 and an extraction mechanism arranged inside the shell 201, the centrifugal extractor is used for forcedly mixing a solvent from the first tank 101 and crude hydrogen peroxide from a purifying tower or an extraction tower and extracting and separating a mixture flow, a solvent outlet I2011 is arranged on the shell 201, and the solvent outlet I2011 is communicated with the first tank 101 through a pipeline;

the separation unit 300 comprises at least one oil-water separator 301, the oil-water separator 301 is used for separating the material flow extracted and separated by the mixing unit 200 into two stages, the oil-water separator 301 comprises a cylinder 3011, a water inlet distribution area I, a coalescence area II and a separation area III are sequentially arranged in the cylinder 3011 along the material flow moving direction, the coalescence area II is provided with a coalescence filter element 3012, the coalescence filter element 3012 is provided with a differential pressure transmitter 3013, and the differential pressure transmitter 3013 is used for monitoring the pressure difference between the inlet and the outlet of the coalescence filter element 3012.

The differential pressure transmitter 3013 obtains the pressure difference between the inlet and outlet of the coalescing filter element 3012 by setting pressure measurement points at the front end and the rear end of the coalescing filter element 3012, respectively, so as to determine whether the coalescing filter element 3012 needs to be replaced, and when the differential pressure transmitter 3013 displays a pressure difference exceeding 0.1MPa, the coalescing filter element 3012 is replaced.

In the utility model, the number of the centrifugal extractors can be selected according to actual needs, the centrifugal extractors forcedly mix crude hydrogen peroxide (heavy phase) and solvent (light phase), and extract and separate under the action of the extraction mechanism, so as to realize the primary purification and separation of the crude hydrogen peroxide, the solvent obtained after the primary purification and separation can be recycled to the solvent tank through a pipeline for reuse, and the obtained first material flow (containing hydrogen peroxide) enters the separation unit 300 for further separation and purification.

The utility model carries out forced mixing and extraction separation by a centrifugal extractor, enhances the mass transfer effect, and can carry out two-stage separation and purification on crude hydrogen peroxide by arranging a coalescing filter element 3012 in an oil-water separator 301, thereby improving the problem of poor separation and purification effect, and the total organic carbon can be reduced to below 100 mg/L; in addition, by arranging the differential pressure transmitter 3013 on the coalescing filter element 3012, the pressure difference between the inlet and the outlet of the coalescing filter element 3012 can be monitored, so that the coalescing filter element 3012 can be replaced in time, and the purification effect is further improved; meanwhile, the solvent can be recycled, and the method is environment-friendly.

In one embodiment of the utility model, the coalescing filter element 3012 is a coalescing filter element having an average pore size of 3-5 μm, a hydrophobic angle of 130 ° -140 ° and an oil-water separation efficiency of not less than 99%. The coalescing filter element 3012 is provided in the oil-water separator 301, so that the purification effect can be remarkably improved, and the total organic carbon content of hydrogen peroxide can be reduced. In an embodiment of the present utility model, the coalescing filter element 3012 has an average pore size of 5 μm, a hydrophobic angle of 140 ° and an oil-water separation efficiency of not less than 99%.

In a specific embodiment of the present utility model, referring to fig. 1 and 2, the separation unit 300 includes two oil-water separators 301 connected in series, and the oil-water separators 301 further include a liquid inlet 3014, a tube plate (not shown in the drawing), a liquid collecting chamber 3015, a drain 3016, and a liquid outlet 3017, the tube plate is disposed inside the cylindrical body 3011 along a radial direction of the cylindrical body 3011, an opening edge of the tube plate is connected with a side wall of the cylindrical body 3011 in a circumferential sealing manner so as to separate the water inlet distribution area I and the coalescence area II, the liquid inlet 3014 is disposed at an upper portion of the cylindrical body 3011 of the water inlet distribution area I, and the liquid collecting chamber 3015 and the liquid outlet 3017 are disposed at an upper portion and a lower portion of the cylindrical body 3011 of the separation area III, respectively.

The oil-water separator 301 provided by the utility model has the characteristics of wide application range for the water quality of oily wastewater and high oil removal efficiency; according to the utility model, the drain 3016 is arranged in the water inlet distribution area I and can be used for discharging the particulate matters which are brought into and deposited in the water inlet distribution area I by the water flow at an irregular period, so that the running stability of the oil-water separator 301 is improved.

Preferably, a solvent outlet II 3018 connected to the first tank 101 through a pipeline is provided at the top of the oil collecting chamber 3015, a first self-control valve 3020 is provided on a connection pipeline between the solvent outlet II 3018 and the first tank 101, a first liquid level meter 3019 is provided in the oil collecting chamber 3015, the first liquid level meter 3019 is in communication connection with the first self-control valve 3020, and the first liquid level meter 3019 is used for detecting the liquid level height in the oil collecting chamber 3015 and sending a liquid level height value to the first self-control valve 3020 so as to control the opening and closing of the first self-control valve 3020.

In the present utility model, the solvent outlet II 3018 circulates the solvent obtained in the oil collecting chamber 3015 back to the first tank 101 through a pipe for reuse.

More preferably, the oil-water separator 301 includes a plurality of coalescing filter elements 3012, the number and size of the openings in the tube plate are set corresponding to the first end openings of the coalescing filter elements 3012, and the coalescing filter elements 3012 are set in parallel with the cylindrical body 3011 in the axial direction and at uniform intervals.

Preferably, the cylindrical body 3011 has a horizontal cylindrical structure.

Preferably, the oil-water separator 301 further comprises a fluid distributor 3021, wherein the fluid distributor 3021 is radially arranged in the water inlet distribution area I along the cylinder 3011 and is close to the tube sheet; the edge of the fluid distributor 3021 is in circumferential sealing connection with the side wall of the barrel 3011.

In one embodiment of the present utility model, referring to fig. 2, the barrel 3011 includes a first side wall and a second side wall disposed correspondingly along an axial direction, the fluid distributor 3021 is disposed in the barrel 3011 and is close to the first side wall, and a space between the fluid distributor 3021 and the first side wall forms a water inlet distribution area II; the coalescing filter element 3012 is axially and horizontally arranged in the cylinder 3011, and the central axis of the coalescing filter element 3012 is parallel to the central axis of the cylinder 3011; the first end opening of coalescing filter element 3012 is adjacent to fluid dispenser 3021; the tube sheet is disposed between the fluid distributor 3021 and coalescing filter element 3012 and is spaced from the fluid distributor 3021; the tube plate is connected with the inner wall of the barrel 3011 along the edge of the opening, and is provided with an opening which is matched with the opening of the first end of the coalescing filter element 3012; in particular, this embodiment may include two or more coalescing cartridges 3012, wherein a first end opening of each coalescing cartridge 3012 is sealingly connected to an aperture of the tube sheet along an opening edge such that water flow into the compartment via the fluid distributor 3021 enters the coalescing cartridges 3012 only through the aperture of the tube sheet; the oil collecting chamber 3015 is arranged at the upper part of the cylinder 3011 of the separation zone III and is close to the second side wall, and the oil collecting chamber 3015 comprises a floating oil inlet (not shown in the drawing) and a solvent outlet II 3018; the floating oil inlet is communicated with the inside of the cylinder 3011; the liquid outlet 3017 is disposed at a lower portion of the barrel 3011 and adjacent to the second side wall. Further, the number of coalescing cartridges 3012 may be adjusted based on the amount of flow processing, with the number of coalescing cartridges 3012 increasing as the amount of flow processing increases.

It should be noted that, the specific working principle of the oil-water separator 301 provided by the present utility model is as follows:

the first stream is introduced into a water inlet distribution area II inside a barrel 3011 of the oil-water separator 301 through a liquid inlet 3014; this stream is then evenly distributed through openings in the flow distributor 3021 and into the space between the flow distributor 3021 and the tubesheet, and then into the interior of each coalescing filter element 3012 through openings in the tubesheet; in each coalescing filter element 3012, the material flow flows out through the openings on the coalescing filter element 3012, then flows through the plurality of stacked coalescing filter elements 3012 in sequence from inside to outside, and as time goes on, the oil drops which are carried by the water flow and are gathered in the coalescing filter elements 3012 continue to be gathered, the oil drops float to the water surface under the action of the oil-water density difference, and are collected and discharged by the oil collecting chamber 3015 at the upper part of the cylinder 3011; the separated purified hydrogen peroxide is discharged through a liquid outlet 3017 in the lower portion of the cylinder 3011. In addition, particulate matter that is entrained and deposited in the intake distribution area II may be periodically discharged from the drain 3016.

In a specific embodiment of the present utility model, referring to fig. 3, a first collecting cavity 2012 and a second collecting cavity 2013 are disposed inside the housing 201, a first flow outlet 2014 is disposed on a side wall of the first collecting cavity 2012, the first flow outlet 2014 is communicated with the liquid inlet 3014 through a pipeline, a first weir 2015 is disposed inside the first collecting cavity 2012, a solvent outlet I2011 is disposed on a side wall of the second collecting cavity 2013, a second weir 2016 is disposed inside the second collecting cavity 2013, a solvent inlet 2017 and a crude hydrogen peroxide inlet 2018 are disposed on a lower portion of the housing 201, and the solvent inlet 2017 and the crude hydrogen peroxide inlet 2018 are disposed on two sides of the housing 201, respectively.

Preferably, a vortex plate 202 for forcibly mixing the solvent and the crude hydrogen peroxide is provided at the bottom of the housing 201.

More preferably, the extraction mechanism comprises a rotary drum 203 and a transmission shaft 204, the transmission shaft 204 is inserted into the casing 201 from the top end of the casing 201 in a central top insertion manner, and a flow baffle 205 is arranged at the bottom end of the transmission shaft 204, and the rotary drum 203 performs circumferential rotation motion around the central axis of the transmission shaft 204 under the driving action of the transmission shaft 204, so that the hydrogen peroxide and the solvent are centrifugally separated.

In the utility model, the solvent and the crude hydrogen peroxide enter the outer cavity of the rotary drum 203 from respective inlets, forced rapid mixing is realized by the rotation of the vortex plate 202, and the mass transfer effect is enhanced. The mixed liquid stream enters the internal cavity through a channel in the bottom of the bowl 203. The liquid stream flows from bottom to top in the interior of the drum 203, while the drive shaft 204 rotates the drum 203 to gradually separate the hydrogen peroxide from the solvent. The separation zone III is from the baffle plate up to the first slice 2015, ensuring that there is enough time to form a liquid-liquid interface. The separated liquid-liquid phases are collected into the first collecting chamber 2012 and the second collecting chamber 2013 by the first weir 2015 and the second weir 2016, respectively, and discharged from the first stream outlet 2014 and the solvent outlet I2011, respectively.

A first pressure gauge 400 and a flow meter 500 are preferably further disposed between the first pump 102 and the mixing unit 200 in this order.

Preferably, a second level gauge 600 for detecting the level of the liquid in the first tank 101 is provided in the first tank 101.

In an embodiment of the present utility model, as shown in fig. 1, a first valve 700 is further disposed on a pipe of the first tank 101 communicating with the first pump 102, and a second valve 800 is disposed on a pipe of the first pump 102 communicating with the mixing unit 200.

The application flow of the system for purifying hydrogen peroxide provided by the utility model is preferably as follows:

(1) 3000mL of crude hydrogen peroxide (from Hunan Shuangyang Gao Ke chemical Co., ltd., total organic carbon content: 285 ppm) and 300mL of solvent I from the first tank 101 were introduced into the mixing unit 200, forcibly mixed at 50℃for 3 minutes to obtain a mixed stream, and then the mixed stream was subjected to centrifugal extraction separation at 2800rpm for 120 seconds at 50℃to obtain a heavy phase stream and a light phase stream, and the light phase stream was recycled back to the mixing unit 200;

(2) Introducing the heavy phase stream into an oil-water separator 301 provided with a coalescing filter element 3012 (with an average pore diameter of 5 mu m and a hydrophobic angle of 140 DEG) for separation treatment, separating and treating for 50s at 50 ℃ to obtain a hydrogen peroxide finished product and a recovered solvent, and recycling the recovered solvent back to the step (1) for extraction treatment;

wherein the solvent I is trioctyl phosphate purchased from Yueyang Zhongshun New Material Co., ltd;

the hydrogen peroxide finished product obtained by the system provided by the utility model is detected, wherein the total organic carbon content is 80ppm.

The system for purifying hydrogen peroxide provided by the utility model can strengthen the mass transfer effect, realize two-stage separation and purification of crude hydrogen peroxide, and solve the problem of poor separation and purification effect, and particularly, the total organic carbon content removal rate of hydrogen peroxide purified by adopting the system provided by the utility model is as high as 72%, so that the service lives of resin adsorption and reverse osmosis membranes for subsequent purification are prolonged.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A system for purifying hydrogen peroxide, the system comprising:

a circulation unit (100) comprising a first tank (101) for containing a solvent, a first pump (102) for pumping said solvent into the mixing unit (200);

a mixing unit (200) comprising at least one centrifugal extractor, wherein the centrifugal extractor comprises a shell (201) and an extraction mechanism arranged inside the shell (201), the centrifugal extractor is used for forcedly mixing a solvent from the first tank (101) and crude hydrogen peroxide from a purification tower or an extraction tower and extracting and separating a mixed flow, a solvent outlet I (2011) is arranged on the shell (201), and the solvent outlet I (2011) is communicated with the first tank (101) through a pipeline;

the separation unit (300) comprises at least one oil-water separator (301), wherein the oil-water separator (301) is used for separating a material flow extracted and separated by the mixing unit (200) into two stages, the oil-water separator (301) comprises a barrel (3011), a water inlet distribution area (I), a coalescence area (II) and a separation area (III) are sequentially arranged in the barrel (3011) along the moving direction of the material flow, the coalescence area (II) is provided with a coalescence filter element (3012), a differential pressure transmitter (3013) is arranged on the coalescence filter element (3012), and the differential pressure transmitter (3013) is used for monitoring the pressure difference between an inlet and an outlet of the coalescence filter element (3012).

2. The system according to claim 1, characterized in that the separation unit (300) comprises two oil-water separators (301) connected in series, and the oil-water separators (301) further comprise a liquid inlet (3014), a tube plate, a liquid collecting chamber (3015), a drain outlet (3016) and a liquid outlet (3017), the tube plate is arranged inside the cylinder (3011) along the radial direction of the cylinder (3011), the opening edge of the tube plate is in circumferential sealing connection with the side wall of the cylinder (3011) so as to separate the water inlet distribution area (I) and the coalescence area (II), the liquid inlet (3014) is positioned at the upper part of the cylinder (3011) of the water inlet distribution area (I), and the liquid collecting chamber (3015) and the liquid outlet (3017) are respectively arranged at the upper part and the lower part of the cylinder (3011) of the separation area (III).

3. The system according to claim 2, characterized in that a solvent outlet II (3018) connected with the first tank (101) through a pipeline is arranged at the top of the oil collecting chamber (3015), a first self-control valve (3020) is arranged on a connecting pipeline of the solvent outlet II (3018) and the first tank (101), a first liquid level meter (3019) is arranged in the oil collecting chamber (3015), the first liquid level meter (3019) is in communication connection with the first self-control valve (3020), and the first liquid level meter (3019) is used for detecting the liquid level height in the oil collecting chamber (3015) and sending a liquid level height value to the first self-control valve (3020) so as to control the opening and closing of the first self-control valve (3020).

4. A system according to claim 3, wherein said oil-water separator (301) comprises a plurality of said coalescing cartridges (3012), the number and size of the openings in said tube sheet being arranged in correspondence with the first end openings of a plurality of said coalescing cartridges (3012), a plurality of said coalescing cartridges (3012) being respectively arranged axially parallel to each other and at uniform intervals with said cylinder (3011); and/or

The cylinder (3011) is of a horizontal cylinder structure.

5. The system of claim 4, wherein the oil-water separator (301) further comprises a fluid distributor (3021), the fluid distributor (3021) being disposed radially along the barrel (3011) within the water intake distribution zone (I) and proximate the tube sheet; the edge of the fluid distributor (3021) is in circumferential sealing connection with the side wall of the barrel (3011).

6. The system according to claim 2, characterized in that a first collecting cavity (2012) and a second collecting cavity (2013) are arranged inside the housing (201), a first logistics outlet (2014) is arranged on the side wall of the first collecting cavity (2012), the first logistics outlet (2014) is communicated with the liquid inlet (3014) through a pipeline, a first weir plate (2015) is arranged inside the first collecting cavity (2012), a solvent outlet is arranged on the side wall of the second collecting cavity (2013), a second weir plate (2016) is arranged inside the second collecting cavity (2013), a solvent inlet (2017) and a crude hydrogen peroxide inlet (2018) are respectively arranged at the lower part of the housing (201), and the solvent inlet (2017) and the crude hydrogen peroxide inlet (2018) are respectively arranged at two sides of the housing (201).

7. The system according to claim 6, characterized in that the bottom of the housing (201) is provided with a vortex disk (202) for forced mixing of solvent and crude hydrogen peroxide.

8. The system according to claim 7, characterized in that the extraction mechanism comprises a drum (203) and a transmission shaft (204), the transmission shaft (204) is inserted into the housing (201) from the top end of the housing (201) in a central top insertion manner, and the bottom end of the transmission shaft (204) is provided with a baffle plate (205), and the drum (203) performs circumferential rotation movement around the central axis thereof under the driving action of the transmission shaft (204) so as to realize centrifugal separation of the hydrogen peroxide and the solvent.

9. The system according to any one of claims 1-8, characterized in that a first pressure gauge (400) and a flow meter (500) are further arranged in sequence between the first pump (102) and the mixing unit (200).

10. The system according to claim 9, characterized in that a second level gauge (600) for detecting the level of the liquid in the first tank (101) is arranged in the first tank (101).