Device and method for impurity removal and purification of industrial hydrogen peroxide

Abstract

The invention is applicable to the technical field of hydrogen peroxide preparation and processing, and provides an industrial hydrogen peroxide impurity removal and purification device and method.The industrial hydrogen peroxide impurity removal and purification device comprises a platform, the front portion of the upper surface of the platform is vertically and fixedly connected with a first mounting frame, and the interior of the first mounting frame is fixedly connected with a vertically-arranged cylindrical extraction tower. According to the impurity removal and purification device and method for industrial hydrogen peroxide, the coarse hydrogen peroxide coalescer, the purification tower, the filter and the fine hydrogen peroxide coalescer are arranged, the device conducts multiple purification on a hydrogen peroxide solution through multiple structures, organic matter and other impurities in the hydrogen peroxide solution are completely removed, the content of organic carbon and particle matter impurities in a product is effectively reduced, and the product quality is improved. Generally, the content of organic carbon after treatment can reach 100 ppm or below, and the load of a purification tower is reduced on the premise that the aromatic hydrocarbon consumption of the same ton of hydrogen peroxide is not changed; according to the process device, the purification effect can be improved by 20-30%, so that the quality of a hydrogen peroxide product is further improved, the market competitiveness is obviously improved, and the economic benefit is obvious.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen peroxide preparation and processing, and in particular relates to a device and method for removing impurities and purifying industrial hydrogen peroxide. Background Art

[0002] Hydrogen peroxide is an important inorganic chemical product. With the continuous upgrading of domestic electronic product technology, the consumption of electronic-grade hydrogen peroxide as one of the electronic component purifiers is also increasing. Industrial-grade hydrogen peroxide, which is the raw material for the production of electronic-grade hydrogen peroxide, has higher and higher requirements for the total amount of organic matter, that is, the lower the total amount of organic matter, the better, otherwise it will affect its quality.

[0003] The anthraquinone method for producing hydrogen peroxide uses 2-ethylanthraquinone and tetrahydroanthraquinone as working carriers, heavy aromatics, acetate, and trioctyl phosphate as mixed solvents, and uses a palladium catalyst fixed bed hydrogenation, air oxidation, and the oxidized working liquid is extracted with a sieve plate tower to obtain a crude hydrogen peroxide solution, which is then purified by a purification tower to obtain a dilute hydrogen peroxide (commonly known as hydrogen peroxide) product. However, at this time, the hydrogen peroxide still contains trace amounts of impurities such as the working liquid. Although it meets national standards, it is still far from meeting the standards of some customers.

[0004] The total amount of organic matter in hydrogen peroxide is determined by the content of slightly soluble organic matter in hydrogen peroxide, and organic matter is mainly composed of water-soluble degradation products and organic solvents. To reduce the content of organic matter, you can choose an organic solvent that is less miscible with hydrogen peroxide, and use a coalescer to separate hydrogen peroxide and organic matter to reduce its content. At present, many domestic manufacturers use acetate process, which is characterized by a significant increase in production capacity compared with the past, but because esters have hydrolysis characteristics, the organic carbon content of the product is also about 1 times higher than before, and downstream manufacturers have an urgent requirement to reduce organic matter.

[0005] With the increasing requirements for environmental protection, the amount of gas recovery solvent in hydrogen peroxide devices is also increasing. At present, all the recovered solvents are returned to the system for self-use, making the per ton consumption of solvent (heavy aromatics) products lower and lower. However, the effect of using this part of the recovered solvent for product purification is not ideal.

[0006] Therefore, how to solve the problem of organic impurities in products and ensure product quality while reducing solvent consumption is very important for us industrial hydrogen peroxide manufacturers. Reducing the content of organic impurities can not only improve product quality and market competitiveness, but also reduce the cost of downstream production of electronic grade hydrogen peroxide, which is conducive to the stability of product quality of downstream customers and thus increase profits. Summary of the invention

[0007] The invention provides an impurity removal and purification device and method for industrial hydrogen peroxide, aiming to solve the problem that certain organic matter and other impurities are mixed in the current hydrogen peroxide during its preparation and production.

[0008] The present invention is implemented as follows: a device for removing impurities from industrial hydrogen peroxide comprises a platform, a first mounting frame is vertically fixedly connected to the front of the upper surface of the platform, a vertically arranged and cylindrical extraction tower is fixedly connected inside the first mounting frame, the upper and bottom ends of the outer surface of the extraction tower are respectively connected to a pure water inlet pipe and a rough water outlet pipe, a sieve plate structure is arranged inside the extraction tower, a second mounting frame is fixedly connected to the middle of the upper surface of the platform, a vertically arranged and cylindrical purification tower is fixedly connected inside the second mounting frame, the upper and bottom ends of the outer surface of the purification tower are respectively connected to a rough water inlet pipe and a refined water outlet pipe, the lower part of the outer surface of the purification tower is connected to an aromatics inlet pipe, and a purification structure is arranged inside the purification tower;

[0009] A crude hydrogen peroxide coalescer is fixedly connected to the upper surface of the platform and located between the first mounting frame and the second mounting frame, a first connecting pipe is connected between the crude water discharge pipe and the liquid inlet of the crude hydrogen peroxide coalescer, a first liquid pump is arranged on the upper surface of the platform and located at the rear of the crude hydrogen peroxide coalescer, a water inlet of the first liquid pump is connected to the liquid outlet of the crude hydrogen peroxide coalescer through a pipeline, and a second connecting pipe is connected between the water outlet of the first liquid pump and the crude water inlet pipe.

[0010] Preferably, a filter is fixedly connected to the upper surface of the platform and located at the rear of the second mounting frame, a third connecting pipe is connected between the refined water discharge pipe and the liquid inlet of the filter, a refined hydrogen peroxide coalescer is fixedly connected to the rear of the upper surface of the platform, a second liquid pump is fixedly connected to the upper surface of the platform and located in front of the refined hydrogen peroxide coalescer, a fourth connecting pipe is connected between the inlet of the second liquid pump and the liquid outlet of the filter, the outlet of the second liquid pump and the inlet of the refined hydrogen peroxide coalescer are connected by a pipeline, and the outlet of the refined hydrogen peroxide coalescer is connected with a discharge pipe.

[0011] Preferably, the sieve plate structure includes a plurality of first device plates and a plurality of second device plates which are laterally fixedly connected to the inside of the extraction tower; the plurality of first device plates and the plurality of second device plates are evenly distributed and spaced apart from each other along the height direction of the inside of the extraction tower; the front portions of the upper surfaces of the plurality of first device plates are vertically penetrated with a plurality of first liquid holes; the rear portions of the upper surfaces of the plurality of second device plates are vertically penetrated with a plurality of second liquid holes.

[0012] Preferably, the lower part and the bottom end of the outer surface of the extraction tower are respectively connected with a working liquid inlet pipe and a working liquid outlet pipe.

[0013] Preferably, the purification structure includes a first distributor and a second distributor which are fixedly connected to the interior of the purification tower and are respectively located below the crude water inlet pipe and above the aromatic hydrocarbon inlet pipe. A support member is fixedly connected to the bottom end of the interior of the purification tower, and a packing layer is provided at the top of the support member.

[0014] Preferably, the purification structure also includes a plurality of third device plates and a plurality of fourth device plates fixedly connected to the interior of the purification tower and located between the first distributor and the second distributor. The plurality of third device plates and the plurality of fourth device plates are evenly spaced along the height direction of the interior of the purification tower and are spaced apart from each other. The front portions of the upper surfaces of the plurality of third device plates are vertically penetrated with a plurality of third liquid holes, and the rear portions of the upper surfaces of the plurality of fourth device plates are vertically penetrated with a plurality of fourth liquid holes.

[0015] Preferably, the rear side of the upper portion of the outer surface of the purification tower is connected to a waste aromatics overflow pipe, the outer end of the waste aromatics overflow pipe is connected to a main waste drain pipe, and the waste outlet of the filter and the waste outlet of the refined hydrogen peroxide coalescer are respectively connected to the main waste drain pipe with a first waste drain pipe and a second waste drain pipe.

[0016] Preferably, the pure water inlet pipe, the working fluid inlet pipe, the working fluid outlet pipe, the first connecting pipe and the third connecting pipe are all provided with regulating valve groups.

[0017] Preferably, an extraction tower vent flame arrester and a purification tower vent flame arrester are respectively provided at the top of the extraction tower and the purification tower, and an interface meter is provided on both the extraction tower and the purification tower.

[0018] As mentioned above, a method for removing impurities and purifying industrial hydrogen peroxide includes the following steps:

[0019] S1: injecting pure water and working liquid into the top and bottom of the extraction tower through the pure water inlet pipe and the working liquid inlet pipe respectively. Since the density of pure water is greater than that of working liquid, pure water will flow downward and working liquid will flow upward, and the two will react with each other to obtain a crude hydrogen peroxide solution;

[0020] S2: controlling the regulating valve group on the first connecting pipe to allow the crude hydrogen peroxide solution to enter the crude hydrogen peroxide coalescer to coalesce and separate a small amount of organic matter;

[0021] S3: starting the first liquid pump to pump the crude hydrogen peroxide solution into the interior of the purification tower through the second connecting pipe, and at the same time injecting fresh aromatic hydrocarbons into the interior of the purification tower through the aromatic hydrocarbon inlet pipe. The density of the fresh aromatic hydrocarbons is lower than that of the crude hydrogen peroxide solution. The fresh aromatic hydrocarbons are mixed with each other, and impurities such as organic matter in the refined hydrogen peroxide solution are further removed under the action of the fresh aromatic hydrocarbons to obtain a refined hydrogen peroxide solution;

[0022] S4: Control the regulating valve group on the third connecting pipe to open, and under the action of the liquid level difference, the refined hydrogen peroxide solution enters the filter through the third connecting pipe, and is filtered by the filter to remove the trace particles entrained therein;

[0023] S5: After being filtered through the filter, the refined hydrogen peroxide solution is pumped into the refined hydrogen peroxide coalescer under the action of the second liquid pump, and is coalesced and separated again. After the organic matter is completely separated, it enters the next process through the discharge pipe.

[0024] Beneficial Effects

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention is a device for removing impurities and purifying industrial hydrogen peroxide. A crude hydrogen peroxide agglomerator, a purification tower, a filter and a refined hydrogen peroxide agglomerator are provided. The device prepares a crude hydrogen peroxide solution by mixing pure water and a working liquid in an extraction tower to produce a reaction. Then, the crude hydrogen peroxide solution is successively agglomerated and purified by the crude hydrogen peroxide agglomerator, the purification tower, the filter and the refined hydrogen peroxide agglomerator to completely remove organic matter and other impurities in the solution, effectively reducing the organic carbon content and particulate impurity content of the product. Generally, the organic carbon content after treatment can reach less than 100 ppm. Under the premise of unchanged consumption of aromatic hydrocarbons per ton of hydrogen peroxide, the load of the purification tower is reduced. The process device can improve the purification effect by 20-30%, thereby further improving the quality of hydrogen peroxide products, significantly improving market competitiveness and achieving significant economic benefits.

[0027] (2) The method for removing impurities and purifying industrial hydrogen peroxide of the present invention further enhances the stability of the hydrogen peroxide solution after purification by providing a crude hydrogen peroxide agglomerator, a purification tower, a filter and a refined hydrogen peroxide agglomerator, thereby reducing the decomposition factors of hydrogen peroxide, thereby further improving the safety of product storage and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 Schematic diagram of the internal structure of the extraction tower in the present invention;

[0030] Figure 3 It is a schematic diagram of the internal structure of the purification tower in the present invention.

[0031] In the figure: 1- platform, 2- first mounting frame, 3- extraction tower, 4- pure water inlet pipe, 5- working liquid inlet pipe, 6- first device plate, 7- second device plate, 8- first liquid hole, 9- second liquid hole, 10- rough water discharge pipe, 11- working liquid discharge pipe, 12- extraction tower venting flame arrester, 13- interface meter, 14- rough hydrogen peroxide coalescer, 15- first connecting pipe, 16- second mounting frame, 17- purification tower, 18- rough water inlet pipe, 19- aromatics inlet pipe, 20- refined water discharge pipe, 21- third device plate, 22 -fourth device plate, 23-third liquid hole, 24-fourth liquid hole, 25-first distributor, 26-second distributor, 27-support member, 28-packing layer, 29-waste aromatics overflow pipe, 30-first liquid pump, 31-second connecting pipe, 32-purification tower venting flame arrester, 33-filter, 34-third connecting pipe, 35-fine hydrogen peroxide coalescer, 36-second liquid pump, 37-drain pipe, 38-main waste discharge pipe, 39-first waste discharge pipe, 40-second waste discharge pipe, 41-regulating valve group. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] See also Figure 1-3 The present invention provides a technical solution: a device for removing impurities from industrial hydrogen peroxide, comprising a platform 1, a first mounting frame 2 is vertically fixedly connected to the front of the upper surface of the platform 1, a vertically arranged and cylindrical extraction tower 3 is fixedly connected inside the first mounting frame 2, the upper and lower ends of the outer surface of the extraction tower 3 are respectively connected to a pure water inlet pipe 4 and a rough water discharge pipe 10, a sieve plate structure is arranged inside the extraction tower 3, a second mounting frame 16 is fixedly connected to the middle of the upper surface of the platform 1, a vertically arranged and cylindrical purification tower 17 is fixedly connected inside the second mounting frame 16, the upper and lower ends of the outer surface of the purification tower 17 are respectively connected to a rough water inlet pipe 18 and a refined water discharge pipe 20, the lower part of the outer surface of the purification tower 17 is connected to an aromatic hydrocarbon inlet pipe 19, and a purification structure is arranged inside the purification tower 17;

[0034] A crude hydrogen peroxide coalescer 14 is fixedly connected to the upper surface of the platform 1 and is located between the first mounting frame 2 and the second mounting frame 16. A first connecting pipe 15 is connected between the crude water discharge pipe 10 and the liquid inlet of the crude hydrogen peroxide coalescer 14. A first liquid pump 30 is provided on the upper surface of the platform 1 and is located at the rear of the crude hydrogen peroxide coalescer 14. The water inlet of the first liquid pump 30 is connected to the liquid outlet of the crude hydrogen peroxide coalescer 14 through a pipeline, and a second connecting pipe 31 is connected between the water outlet of the first liquid pump 30 and the crude water inlet pipe 18.

[0035] A filter 33 is fixedly connected to the upper surface of the platform 1 and located at the rear of the second mounting frame 16, a third connecting pipe 34 is connected between the refined water discharge pipe 20 and the liquid inlet of the filter 33, a refined hydrogen peroxide agglomerator 35 is fixedly connected to the rear of the upper surface of the platform 1, a second liquid pump 36 is fixedly connected to the upper surface of the platform 1 and located in front of the refined hydrogen peroxide agglomerator 35, a fourth connecting pipe is connected between the inlet of the second liquid pump 36 and the liquid outlet of the filter 33, the outlet of the second liquid pump 36 and the inlet of the refined hydrogen peroxide agglomerator 35 are connected by a pipeline, and the outlet of the refined hydrogen peroxide agglomerator 35 is connected with a discharge pipe 37.

[0036] The lower part and the bottom end of the outer surface of the extraction tower 3 are respectively connected with a working liquid inlet pipe 5 and a working liquid outlet pipe 11.

[0037] In this embodiment, when the device is in operation, first, pure water and working liquid are injected into the interior of the extraction tower 3 through the pure water inlet pipe 4 and the working liquid inlet pipe 5. The pure water is injected from the upper part of the extraction tower 3, and the working liquid is injected from the lower part of the extraction tower 3. The density of the working liquid is less than the density of the pure water. After the two contact, the working liquid will flow upward, and the pure water will flow downward. In this process, the two react with each other to obtain a crude hydrogen peroxide solution. Then, the first connecting pipe 15 is opened. Under the action of the liquid level difference, the crude hydrogen peroxide solution inside the extraction tower 3 will enter the interior of the crude hydrogen peroxide coalescer 14, and coalesce and separate therein to separate a small amount of organic matter and the working liquid, completing the first step of purification. Then, under the action of the first liquid pump 30, it enters the interior of the purification tower 17 through the second connecting pipe 31. At the same time, the aromatic hydrocarbon inlet pipe 19 at the lower part of the purification tower 17 also introduces fresh aromatic hydrocarbons, and the density of fresh aromatic hydrocarbons is also less than that of hydrogen peroxide. The density of water is large, so the two will flow relatively. In the process of interaction, fresh aromatic hydrocarbons can further remove organic matter and other impurities in hydrogen peroxide, and then a refined hydrogen peroxide solution can be obtained. At this time, the third connecting pipe 34 is opened. Also under the action of the liquid level difference, the refined hydrogen peroxide solution enters the filter 33 and is filtered, and then is pumped into the refined hydrogen peroxide coalescer 35 under the action of the second liquid pump 36 for further coalescence and separation. After multiple rounds of purification, organic matter and other impurities in the hydrogen peroxide solution are completely removed, and the organic carbon and particulate impurity content of the product are effectively reduced. Generally, the organic carbon content after treatment can reach less than 100ppm. Under the premise of the same consumption of aromatic hydrocarbons per ton of hydrogen peroxide, the load of the purification tower is reduced. The process device can improve the purification effect by 20-30%, thereby further improving the quality of hydrogen peroxide products, significantly improving market competitiveness, and achieving obvious economic benefits.

[0038] The working liquid discharge pipe 11 is used to discharge the working liquid after the reaction.

[0039] Furthermore, the sieve plate structure includes a plurality of first device plates 6 and a plurality of second device plates 7 which are laterally fixedly connected to the inside of the extraction tower 3. The plurality of first device plates 6 and the plurality of second device plates 7 are evenly spaced apart along the height direction of the inside of the extraction tower 3 and are spaced apart from each other. The front portions of the upper surfaces of the plurality of first device plates 6 are vertically penetrated with a plurality of first liquid holes 8, and the rear portions of the upper surfaces of the plurality of second device plates 7 are vertically penetrated with a plurality of second liquid holes 9.

[0040] In this embodiment, the first liquid hole 8 and the second liquid hole 9 opened on the first device plate 6 and the second device plate 7 in the sieve plate structure are staggered with each other. When the pure water and the working liquid flow inside the extraction tower 3, they will flow in an S shape, thereby ensuring the contact time between the working liquid and the pure water, so that the mutual reaction between the two is more sufficient, which is beneficial to the extraction effect.

[0041] Furthermore, the purification structure includes a first distributor 25 and a second distributor 26 which are fixedly connected to the interior of the purification tower 17 and are respectively located below the raw water inlet pipe 18 and above the aromatic hydrocarbon inlet pipe 19. A support member 27 is fixedly connected to the bottom end of the interior of the purification tower 17, and a packing layer 28 is provided at the top of the support member 27.

[0042] The purification structure also includes a plurality of third device plates 21 and a plurality of fourth device plates 22 fixedly connected to the interior of the purification tower 17 and located between the first distributor 25 and the second distributor 26. The plurality of third device plates 21 and the plurality of fourth device plates 22 are evenly spaced and spaced apart from each other along the height direction of the interior of the purification tower 17. The front portions of the upper surfaces of the plurality of third device plates 21 are vertically penetrated with a plurality of third liquid holes 23, and the rear portions of the upper surfaces of the plurality of fourth device plates 22 are vertically penetrated with a plurality of fourth liquid holes 24.

[0043] In this embodiment, the effects of the third device plate 21 and the fourth device plate 22 in the purification structure are the same as those in the sieve plate structure, ensuring the contact time between the fresh aromatic hydrocarbons and the hydrogen peroxide solution, thereby ensuring the effect of removing impurities and organic matter in the hydrogen peroxide solution from the fresh aromatic hydrocarbons. The first distributor 25 and the second distributor 26 can make the hydrogen peroxide solution and the fresh aromatic hydrocarbons evenly distributed after entering the interior of the purification tower 17, which is beneficial to the contact between the two.

[0044] The packing layer 28 is stainless steel structured packing stainless steel 31603, and is pickled and passivated to further reduce the introduction of metal ions, which is beneficial to improving the stability of hydrogen peroxide. The use of this packing increases the flexibility of the purification tower operation, is not prone to flooding, and is easy to control the operation. The total organic carbon of the product can be controlled within less than 100ppm. The stainless steel structured packing in the purification tower refers to the process in which the immiscible fluid emulsion passes through the packing to turn the dispersed phase tiny droplets into large droplets. The solvent countercurrent purification technology is a physical and chemical method for separating oil and water. The objects to be treated are mainly the dispersed oil in hydrogen peroxide and the emulsified oil stabilized by non-surfactant, or the water dispersed in the oil phase.

[0045] Furthermore, a waste aromatics overflow pipe 29 is connected to the rear side of the upper portion of the outer surface of the purification tower 17, and the outer end of the waste aromatics overflow pipe 29 is connected to a main waste discharge pipe 38. The waste outlet of the filter 33 and the waste outlet of the refined hydrogen peroxide agglomerator 35 are respectively connected to the main waste discharge pipe 38 with a first waste discharge pipe 39 and a second waste discharge pipe 40.

[0046] In this embodiment, waste aromatic hydrocarbons formed after fresh aromatic hydrocarbons contact with the hydrogen peroxide solution will be discharged through the waste aromatic hydrocarbon overflow pipe 29 and flow along the main waste discharge pipe 38. In this process, the waste discharged through the filter 33 and the refined hydrogen peroxide agglomerator 35 will also be merged into the main waste discharge pipe 38 and discharged together.

[0047] Furthermore, regulating valve groups 41 are provided on the pure water inlet pipe 4 , the working fluid inlet pipe 5 , the working fluid discharge pipe 11 , the first connecting pipe 15 and the third connecting pipe 34 .

[0048] In this embodiment, a plurality of regulating valve groups 41 can control the opening and closing of each pipeline in the device and the flow rate and velocity of the fluid in the pipeline, thereby ensuring the smooth operation of the entire process.

[0049] Furthermore, an extraction tower venting flame arrester 12 and a purification tower venting flame arrester 32 are respectively provided at the top of the extraction tower 3 and the purification tower 17 , and an interface meter 13 is provided on both the extraction tower 3 and the purification tower 17 .

[0050] In this embodiment, the extraction tower venting flame arrester 12 and the purification tower venting flame arrester 32 can prevent overpressure caused by decomposition of hydrogen peroxide to ensure the overall safety performance of the equipment. The interface meter 13 can be controlled in conjunction with the regulating valve group 41 to ensure that the liquid level in the purification tower 17 and the extraction tower 3 remains at a safe level.

[0051] As mentioned above, a method for removing impurities and purifying industrial hydrogen peroxide comprises the following steps:

[0052] S1: Pure water and working liquid are injected into the top and bottom of the extraction tower 3 through the pure water inlet pipe 4 and the working liquid inlet pipe 5, respectively. Since the density of pure water is greater than that of the working liquid, the pure water will flow downwards and the working liquid will flow upwards, and the two will react with each other to obtain a crude hydrogen peroxide solution;

[0053] S2: Controlling the regulating valve group 41 on the first connecting pipe 15 to allow the crude hydrogen peroxide solution to enter the interior of the crude hydrogen peroxide coalescer 14 to coalesce and separate a small amount of organic matter;

[0054] S3: starting the first liquid pump 30 to pump the crude hydrogen peroxide solution into the interior of the purification tower 17 through the second connecting pipe 31, and at the same time injecting fresh aromatic hydrocarbons into the interior of the purification tower 17 through the aromatic hydrocarbon inlet pipe 19. The density of the fresh aromatic hydrocarbons is lower than that of the crude hydrogen peroxide solution. The fresh aromatic hydrocarbons are mixed with each other, and the impurities such as organic matter in the refined hydrogen peroxide solution are further removed under the action of the fresh aromatic hydrocarbons to obtain the refined hydrogen peroxide solution;

[0055] S4: Control the regulating valve group 41 on the third connecting pipe 34 to open. Under the action of the liquid level difference, the refined hydrogen peroxide solution enters the filter 33 through the third connecting pipe 34 and is filtered by the filter 33 to remove the trace particles carried therein;

[0056] S5: After being filtered through the filter 33, the refined hydrogen peroxide solution is pumped into the refined hydrogen peroxide solution coalescer 35 by the second liquid pump 36, and is coalesced and separated again. After the organic matter is completely separated, it enters the next process through the drain pipe 37.

[0057] The working principle and use process of the present invention: After the present invention is installed, when the device is in operation, firstly, pure water and working liquid are injected into the interior of the extraction tower 3 through the pure water inlet pipe 4 and the working liquid inlet pipe 5. The pure water is injected from the upper part of the extraction tower 3, and the working liquid is injected from the lower part of the extraction tower 3. The density of the working liquid is less than the density of the pure water. After the two are in contact, the working liquid will flow upward, and the pure water will flow downward. In this process, the two react with each other to obtain a crude hydrogen peroxide solution. Then, the first connecting pipe 15 is opened. Under the action of the liquid level difference, the crude hydrogen peroxide solution inside the extraction tower 3 will enter the interior of the crude hydrogen peroxide coalescer 14, and coalesce and separate therein to separate a small amount of organic matter and the working liquid. The first step of purification is completed, and then, under the action of the first liquid pump 30, it enters the interior of the purification tower 17 through the second connecting pipe 31. At the same time, the aromatic hydrocarbon inlet pipe 19 at the lower part of the purification tower 17 also introduces fresh aromatic hydrocarbons. The density of fresh aromatic hydrocarbons is also less than that of hydrogen peroxide, so the two will flow relatively. In the process of interaction, the fresh aromatic hydrocarbons can further remove impurities such as organic matter in the hydrogen peroxide, and then a refined hydrogen peroxide solution can be obtained. At this time, the third connecting pipe 34 is opened. Similarly, under the action of the liquid level difference, the refined hydrogen peroxide solution enters the filter 33 and is filtered, and then is pumped into the refined hydrogen peroxide coalescer 35 under the action of the second liquid pump 36 for further coalescence and separation, and finally flows to the next process through the discharge pipe 37.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for removing impurities and purifying industrial hydrogen peroxide, characterized in that: The invention comprises a platform (1), wherein a first mounting frame (2) is vertically fixedly connected to the front of the upper surface of the platform (1), a vertically arranged and cylindrical extraction tower (3) is fixedly connected inside the first mounting frame (2), the upper and lower ends of the outer surface of the extraction tower (3) are respectively connected to a pure water inlet pipe (4) and a rough water outlet pipe (10), a sieve plate structure is arranged inside the extraction tower (3), a second mounting frame (16) is fixedly connected to the middle of the upper surface of the platform (1), a vertically arranged and cylindrical purification tower (17) is fixedly connected inside the second mounting frame (16), the upper and lower ends of the outer surface of the purification tower (17) are respectively connected to a rough water inlet pipe (18) and a refined water outlet pipe (20), the lower part of the outer surface of the purification tower (17) is connected to an aromatic hydrocarbon inlet pipe (19), and a purification structure is arranged inside the purification tower (17); A crude hydrogen peroxide coalescer (14) is fixedly connected to the upper surface of the platform (1) and is located between the first mounting frame (2) and the second mounting frame (16); a first connecting pipe (15) is connected between the crude water discharge pipe (10) and the liquid inlet of the crude hydrogen peroxide coalescer (14); a first liquid pump (30) is provided on the upper surface of the platform (1) and is located at the rear of the crude hydrogen peroxide coalescer (14); the water inlet of the first liquid pump (30) is connected to the liquid outlet of the crude hydrogen peroxide coalescer (14) through a pipeline; and a second connecting pipe (31) is connected between the water outlet of the first liquid pump (30) and the crude water inlet pipe (18).

2. The device for removing impurities and purifying industrial hydrogen peroxide according to claim 1, characterized in that: A filter (33) is fixedly connected to the upper surface of the platform (1) and located at the rear of the second mounting frame (16); a third connecting pipe (34) is connected between the refined water discharge pipe (20) and the liquid inlet of the filter (33); a refined hydrogen peroxide coalescer (35) is fixedly connected to the rear of the upper surface of the platform (1); a second liquid pump (36) is fixedly connected to the upper surface of the platform (1) and located at the front of the refined hydrogen peroxide coalescer (35); a fourth connecting pipe is connected between the inlet of the second liquid pump (36) and the liquid outlet of the filter (33); the outlet of the second liquid pump (36) and the inlet of the refined hydrogen peroxide coalescer (35) are connected via a pipeline; and the outlet of the refined hydrogen peroxide coalescer (35) is connected with a discharge pipe (37).

3. The device for removing impurities and purifying industrial hydrogen peroxide according to claim 1, characterized in that: The sieve plate structure comprises a plurality of first device plates (6) and a plurality of second device plates (7) which are transversely fixedly connected to the inside of the extraction tower (3); the plurality of first device plates (6) and the plurality of second device plates (7) are evenly spaced and arranged at intervals along the height direction of the inside of the extraction tower (3); the front portions of the upper surfaces of the plurality of first device plates (6) are vertically penetrated with a plurality of first liquid holes (8); the rear portions of the upper surfaces of the plurality of second device plates (7) are vertically penetrated with a plurality of second liquid holes (9).

4. The device for removing impurities and purifying industrial hydrogen peroxide according to claim 1, characterized in that: The lower part and the bottom end of the outer surface of the extraction tower (3) are respectively connected to a working liquid inlet pipe (5) and a working liquid outlet pipe (11).

5. The device for removing impurities and purifying industrial hydrogen peroxide according to claim 1, characterized in that: The purification structure comprises a first distributor (25) and a second distributor (26) which are fixedly connected to the inside of the purification tower (17) and are respectively located below the crude water inlet pipe (18) and above the aromatic hydrocarbon inlet pipe (19); a support member (27) is fixedly connected to the bottom end of the inside of the purification tower (17); a packing layer (28) is provided at the top end of the support member (27).

6. A device for removing impurities and purifying industrial hydrogen peroxide as claimed in claim 5, characterized in that: The purification structure further comprises a plurality of third device plates (21) and a plurality of fourth device plates (22) which are fixedly connected to the interior of the purification tower (17) and are located between the first distributor (25) and the second distributor (26); the plurality of third device plates (21) and the plurality of fourth device plates (22) are evenly spaced and arranged in a spaced relationship along the height direction of the interior of the purification tower (17); a plurality of third liquid holes (23) are vertically penetrated on the front portions of the upper surfaces of the plurality of third device plates (21); and a plurality of fourth liquid holes (24) are vertically penetrated on the rear portions of the upper surfaces of the plurality of fourth device plates (22).

7. The device for removing impurities and purifying industrial hydrogen peroxide as claimed in claim 2, characterized in that: The rear side of the upper portion of the outer surface of the purification tower (17) is connected to a waste aromatics overflow pipe (29), the outer end of the waste aromatics overflow pipe (29) is connected to a main waste discharge pipe (38), and a first waste discharge pipe (39) and a second waste discharge pipe (40) are respectively connected between the waste discharge port of the filter (33) and the waste discharge port of the refined hydrogen peroxide coalescer (35) and the main waste discharge pipe (38).

8. The device for removing impurities and purifying industrial hydrogen peroxide as claimed in claim 4, characterized in that: The pure water inlet pipe (4), the working fluid inlet pipe (5), the working fluid discharge pipe (11), the first connecting pipe (15) and the third connecting pipe (34) are all provided with regulating valve groups (41).

9. The device for removing impurities and purifying industrial hydrogen peroxide according to claim 1, characterized in that: An extraction tower vent flame arrester (12) and a purification tower vent flame arrester (32) are respectively arranged at the top of the extraction tower (3) and the purification tower (17), and an interface meter (13) is arranged on both the extraction tower (3) and the purification tower (17).

10. A method for removing impurities and purifying industrial hydrogen peroxide as described in claims 1-9, characterized in that: The following steps are involved: S1: Pure water and working liquid are injected into the top and bottom of the extraction tower (3) through the pure water inlet pipe (4) and the working liquid inlet pipe (5), respectively. Since the density of pure water is greater than that of working liquid, pure water will flow downwards and working liquid will flow upwards, and the two will react with each other to obtain a crude hydrogen peroxide solution; S2: controlling the regulating valve group (41) on the first connecting pipe (15) to allow the crude hydrogen peroxide solution to enter the interior of the crude hydrogen peroxide coalescer (14) to coalesce and separate a small amount of organic matter; S3: starting the first liquid pump (30) to pump the crude hydrogen peroxide solution into the interior of the purification tower (17) through the second connecting pipe (31), and at the same time injecting fresh aromatic hydrocarbons into the interior of the purification tower (17) through the aromatic hydrocarbon inlet pipe (19). The density of the fresh aromatic hydrocarbons is lower than that of the crude hydrogen peroxide solution. The fresh aromatic hydrocarbons are mixed with each other, and impurities such as organic matter in the refined hydrogen peroxide solution are further removed under the action of the fresh aromatic hydrocarbons to obtain a refined hydrogen peroxide solution; S4: controlling the regulating valve group (41) on the third connecting pipe (34) to open, so that under the action of the liquid level difference, the refined hydrogen peroxide solution enters the filter (33) through the third connecting pipe (34), and is filtered by the filter (33) to remove trace particles entrained therein; S5: After being filtered through the filter (33), the refined hydrogen peroxide solution is pumped into the refined hydrogen peroxide coalescer (35) by the second liquid pump (36) to undergo coalescing and separation again. After the organic matter is completely separated, the solution enters the next process through the discharge pipe (37).

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