Amine liquid purification wastewater treatment tank and skid-mounted system thereof

Abstract

The utility model provides an amine liquid purification wastewater treatment tank and a skid-mounted system thereof, which can couple carbon dioxide neutralization, heterogeneous catalytic oxidation and gas-liquid separation technologies to realize high-efficiency purification of wastewater in an ion exchange tank and reutilization of carbon dioxide, and comprises a tank body, the tank body is sequentially provided with a turbulence strengthening layer, a catalyst packing layer and a gas-liquid separation layer from bottom to top, the tank body is filled with hydrogen peroxide, and the hydrogen peroxide at least submerges the catalyst packing layer; wherein the turbulence strengthening layer is provided with a gas distribution assembly, an input port of the gas distribution assembly is connected to a carbon dioxide gas output end of a regeneration tower of the decarburization system, and the catalyst packing layer is filled with a heterogeneous catalyst.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial wastewater treatment technical field especially, it relates to a kind of amine liquid purification wastewater treatment device and pry dress system based on catalytic oxidation technology, it is applicable to the carbon dioxide generated in decarbonization system regenerator and pry dress system containing alcohol amine organic matter alkaline wastewater treatment. BACKGROUND

[0002] Alcohol amine solvent (including MDEA, MEA and DEA etc.) is widely used in acid gas purification, including synthetic ammonia decarbonization, natural gas decarbonization, natural gas hydrogen production decarbonization, flue gas decarbonization and LNG deep decarbonization.But, alcohol amine solvent is often contaminated or oxidized degradation in use process.For example, in wellhead gas preparation LNG, wellhead gas often carries hydrochloric acid, formic acid, sulfuric acid and thiosulfuric acid etc. in fracturing fluid to amine liquid, so that amine liquid is neutralized;Large amount of oxygen in flue gas decarbonization can make alcohol amine solvent oxidized degradation, form formic acid, acetic acid, glycolic acid and oxalic acid etc., which can also form heat stable salt with alcohol amine.These heat stable salts not only make desulfurization and decarbonization effect decline, but also corrode device equipment, cause solution foaming etc., and then make production device processing capacity decline, even unable to run.

[0003] Heat stable salt in amine liquid is usually removed by ion exchange, such as using strong basic anion exchange resin and weak basic anion exchange resin to remove the above anion alone.This gradually forms a pry dress amine liquid purification device based on ion exchange technology and combined with other filtration technologies.

[0004] As known, anion exchange resin is regenerated by using excess lye, and strong alkaline wastewater (PH>14) is generated in regeneration process, and wastewater COD is as high as about 50,000 mg / L, and COD comes from alcohol amine solvent remaining on resin;These wastewater will have great impact on original wastewater treatment station of factory, and even difficult to digest and treat, and the usual index of wastewater accepted by wastewater treatment station is PH 6-9 and COD<500 mg / L.

[0005] An amine liquid purification device is disclosed in Chinese patent CN205019965U, including mechanical filter, organic matter adsorption filter, deionization filter, amine liquid discharge device, inert gas containing device, wastewater is directly discharged.But, wastewater treatment is not involved.

[0006] A kind of amine liquid purification system for removing amino acid and thiocyanate is disclosed in Chinese patent CN103223266A, the resin bed is regenerated using lye with mass concentration less than 4%, after the resin is regenerated using lye, it is rinsed using desalted water, the regeneration waste liquid is discharged into acidic water stripping device or used in lye washing system of liquefied gas and gasoline, and the rinsing waste water is directly discharged into a ditch.Waste liquid discharged into lye washing system is a waste recycling, but many places do not have such lye washing system;Rinsing water has high alkalinity and COD as waste lye.

[0007] A waste lye recycling system of amine liquid purification device is disclosed in Chinese patent CN205710249U, waste lye generated in the process of amine liquid purification contains hydrogen sulfide, which needs to be introduced into wet oxidation desulfurization device for desulfurization treatment, and then introduced into ammonia stripping device to reduce the consumption of lye in ammonia stripping device.However, many factories do not have ammonia stripping device, and the composition of waste lye is complex, which will affect the stable operation of stripping device.

[0008] An amine liquid purification and recycling system of carbon dioxide capture system of coal-fired power plant flue gas is disclosed in Chinese patent CN203866136U, which includes activated carbon filter, safety filter and ion exchanger, and uses macroporous strong base anion exchange resin to remove anions in decarbonization liquid.However, this system does not consider the treatment of regeneration waste liquid.

[0009] Chinese patent CN210303693U discloses an organic solvent purification skid-mounted equipment, which includes skid-mounted rack, explosion-proof electric control cabinet, flat resin bed, lye tank, water-containing circulating water tank, amine-containing circulating tank, safety filter, etc., and the core is to remove heat stable salts in lean liquid by anion resin and regenerate the resin using sodium hydroxide solution.Although the discharged waste liquid is less, but the waste liquid is still not treated and directly discharged. Utility model content

[0010] The utility model discloses a kind of amine liquid purification wastewater treatment tanks and pry dress systems thereof, which can couple carbon dioxide neutralization, heterogeneous catalytic oxidation and gas-liquid separation technology, realize waste water efficient purification and carbon dioxide recycling.

[0011] Embodiments of the utility model are implemented as follows:

[0012] An amine liquid purification wastewater treatment tank includes a tank body, which is sequentially provided with a turbulent flow enhancement layer, a catalyst packing layer and a gas-liquid separation layer from bottom to top, and is filled with hydrogen peroxide, which at least submerges the catalyst packing layer; wherein the turbulent flow enhancement layer is provided with a gas distribution assembly, the input port of the gas distribution assembly is connected to the carbon dioxide gas output end of a decarbonization system regeneration tower, and the catalyst packing layer is filled with heterogeneous catalyst.

[0013] In the preferable embodiment of the utility model, the above-mentioned air distribution assembly comprises: a main air inlet pipe, a total vortex distributor, a branch air inlet pipe and a sub vortex distributor, the total vortex distributor is arranged at the center of the tank body, the main air inlet pipe is introduced from the outside of the tank body to the inside of the tank body and connected to the total vortex distributor, the total vortex distributor has a plurality of shunt chambers arranged in a ring array, the contact surface between the shunt chambers is provided with a first through hole, and each chamber is connected with a sub vortex distributor through the branch air inlet pipe.

[0014] In the preferable embodiment of the utility model, the above-mentioned total vortex distributor comprises a central chamber and a shunt chamber, an electric telescopic pipe and an umbrella-shaped vortex distributor, the contact surface of the central chamber and the shunt chamber is provided with a second through hole, the central chamber is equipped with the electric telescopic pipe penetrating through the central chamber, the middle part of the pipe body of the electric telescopic pipe is provided with the umbrella-shaped vortex distributor in the shape of a cone, a plurality of first air nozzles are arranged on the umbrella-shaped vortex distributor, when the pipe body of the electric telescopic pipe is inserted into the bottom of the central chamber, the pipe body blocks the second through hole, and air flow is sprayed out from the central chamber, the electric telescopic pipe and the first air nozzle.

[0015] In the preferable embodiment of the utility model, the umbrella rib of the above-mentioned umbrella-shaped vortex distributor is a pipe body penetrating through the central chamber, and a plurality of first air nozzles are arranged on each pipe body.

[0016] In the preferable embodiment of the utility model, the above-mentioned sub vortex distributor is provided with a plurality of air distribution branch pipes tangent to the outer circle of the sub vortex distributor, the end of each air distribution branch pipe is provided with a second air nozzle, and the second air nozzle faces the inner wall of the tank body.

[0017] In the preferable embodiment of the utility model, the above-mentioned catalyst packing layer comprises a circular ring body with a hollow through hole on the upper and lower surfaces, a corrugated plate type separation screen is arranged in the circular ring body, the mesh diameter of the separation screen gradually decreases from top to bottom, and a feeding pipe is arranged at the top of the circular ring body close to the outer circle position.

[0018] In the preferable embodiment of the utility model, the tank body is provided with a transparent window at the assembly position of the catalyst packing layer.

[0019] In the preferable embodiment of the utility model, the above-mentioned gas-liquid separation layer is provided with a demister.

[0020] In the preferable embodiment of the utility model, the bottom of the tank body is in a conical structure, and the tank body bottom is provided with a sludge collecting hopper with an inclination angle ≥ 60°.

[0021] An amine liquid purification skid-mounted system comprises the amine liquid purification wastewater treatment tank in any of the preceding embodiments, and the amine liquid purification skid-mounted system comprises a plate heat exchanger, a mechanical filter, an ultrafiltration filter and an ion exchange tank connected in sequence, and waste liquid generated in the ion exchange tank is connected to the amine liquid purification wastewater treatment tank through a pipeline.

[0022] The embodiment of the utility model has the advantages of

[0023] 1, resource utilization carbon dioxide: with the byproduct carbon dioxide of decarburization system to replace strong acid to adjust pH, reduce cost and operation risk, and strengthen gas-liquid mass transfer;

[0024] 2, efficient catalytic system: heterogeneous catalyst realizes high-efficiency oxidation of hydrogen peroxide at normal temperature, and the packing structure has the function of dispersing gas, and has long service life;

[0025] 3, modular design: the processing tank and the pretreatment unit are integrated into a pry-mounted system, which is suitable for rapid deployment on site and improves the processing efficiency by more than 30%. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0027] Figure 1 It is the structure schematic drawing of the amine liquid purification wastewater treatment tank of the embodiment of the utility model;

[0028] Figure 2 It is the structure schematic drawing of the gas distribution assembly of the embodiment of the utility model;

[0029] Figure 3 It is the connection schematic drawing of the amine liquid purification pry-mounted system of the embodiment of the utility model;

[0030] Icon:

[0031] The amine liquid purification wastewater treatment tank 100;Tank body 110;Turbulence reinforcement layer 120;Catalyst packing layer 130;Annular body 131;Corrugated plate type separation screen 132;Charging pipe 133;Transparent window 134;Gas-liquid separation layer 140;Demister 141;Wastewater input pipe 150;Discharge pipe 160;Gas distribution assembly 170;Air inlet main pipe 171;Total vortex distributor 172;Shunt chamber 1721;Central chamber 1722;Electric telescopic pipe 1723;Umbrella type vortex distributor 1724;First air jet 1725;Air inlet branch pipe 173;Auxiliary vortex distributor 174;Gas distribution branch pipe 1741;Second air jet 1742.

[0032] Decarburization system 200;Plate heat exchanger 210;Mechanical filter 220;Ultrafiltration filter 230;Ion exchange tank 240. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0035] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] First embodiment

[0040] See Figure 1 and Figure 2 The present embodiment provides an amine liquid purification wastewater treatment tank 100, comprising a tank body 110, a turbulent flow enhancement layer 120, a catalyst packing layer 130, and a gas-liquid separation layer 140 arranged in the tank body 110 from bottom to top, the tank body 110 is filled with hydrogen peroxide, the hydrogen peroxide at least submerges the catalyst packing layer 130, the tank body 110 is further provided with a wastewater input pipe 150 for the amine liquid purification wastewater to enter and a discharge pipe 160 for the treated purified water to be discharged, and a gas discharge valve; wherein the turbulent flow enhancement layer 120 is provided with a gas distribution assembly 170, the input port of the gas distribution assembly 170 is connected to the carbon dioxide gas output end of the decarbonization system regeneration tower, and the catalyst packing layer 130 is filled with a heterogeneous catalyst.

[0041] In the present embodiment, the carbon dioxide gas discharged from the top of the decarbonization system regeneration tower needs to be cooled, which is achieved by a heat exchanger, which can be installed on the input pipeline of the gas distribution assembly 170, and the carbon dioxide gas enters the wastewater treatment tank through the gas distribution assembly 170 after its temperature is lowered to below 40℃.

[0042] The reaction process inside the tank body 110 includes:

[0043] 1. Acid-base neutralization process

[0044] The PH value of the amine liquid purification wastewater is adjusted by acid-base neutralization with carbon dioxide gas to reach the range of PH 6-9. Carbon dioxide is a byproduct of the decarbonization system, which has the advantage of local availability, thereby being able to achieve lower cost. In addition, the gas-phase carbon dioxide incorporated into the waste lye also plays a stirring role, which is conducive to the smooth implementation of the catalytic oxidation reaction. In addition to the foregoing reasons, the present embodiment chooses carbon dioxide instead of other acids (such as hydrochloric acid, sulfuric acid, formic acid, oxalic acid, etc.) because some acid substances are regulated, some are inconvenient to use, and there are safety risks in the operation process.

[0045] 2. Catalytic oxidation reaction process

[0046] The catalyst packing layer 130 in the tank body 110 uses a heterogeneous solid catalyst (such as a transition metal oxide, such as one or a mixture of cobalt oxide, cerium oxide, etc. supported on a high-strength molecular sieve) to perform hydrogen peroxide oxidation reaction on the organic matter (such as alcohol amine, etc.) in the waste lye, which can be implemented at room temperature. The process requires less hydrogen peroxide, but can achieve good oxidation effect. Moreover, the byproducts produced in the decomposition process of hydrogen peroxide are oxygen and water, and no new pollutants are generated. At the same time, the heterogeneous catalyst not only acts as an oxidation catalyst, but also acts as a dispersion filler for gas-liquid contact, and can be reused.

[0047] In the embodiment, in order to better realize the above-mentioned reaction, the internal structure of the tank 110 is further improved. The gas distribution assembly 170 comprises: a main gas inlet pipe 171, a main vortex distributor 172, a gas inlet branch pipe 173, and a sub-vortex distributor 174. The main vortex distributor 172 is arranged at the center of the tank 110. The main gas inlet pipe 171 is introduced from the outside of the tank 110 into the inside of the tank 110 and is connected to the main vortex distributor 172. The main vortex distributor 172 has a plurality of shunt chambers 1721 arranged in a ring array. The contact surfaces between the shunt chambers 1721 are provided with first through holes. Each chamber is connected to a sub-vortex distributor 174 through a gas inlet branch pipe 173.

[0048] The main vortex distributor 172 comprises a central chamber 1722 and a shunt chamber 1721, an electric telescopic pipe 1723, and an umbrella-type vortex distributor 1724. The contact surfaces of the central chamber 1722 and the shunt chamber 1721 are provided with second through holes. The central chamber 1722 is equipped with the electric telescopic pipe 1723 which penetrates the central chamber 1722. The middle part of the pipe body of the electric telescopic pipe 1723 is provided with the umbrella-type vortex distributor 1724 in the shape of a cone. A plurality of first gas nozzles 1725 are arranged on the umbrella-type vortex distributor 1724. When the pipe body of the electric telescopic pipe 1723 is inserted into the bottom of the central chamber 1722, the pipe body blocks the second through holes. The gas flow is sprayed from the central chamber 1722, the electric telescopic pipe 1723, and the first gas nozzles 1725. The ribs of the umbrella-type vortex distributor 1724 are pipe bodies which penetrate the central chamber 1722. A plurality of first gas nozzles 1725 are arranged on each pipe body.

[0049] The sub-vortex distributor 174 is provided with a plurality of gas distribution branch pipes 1741 which are tangent to the outer circle of the sub-vortex distributor 174. The end of each gas distribution branch pipe 1741 is provided with a second gas nozzle 1742 which faces the inner wall of the tank 110.

[0050] The main gas inlet pipe 171 is also provided with a flow meter and an electromagnetic valve. The flow meter transmits data to the PLC controller for analysis. The state of the electromagnetic valve and the electric telescopic pipe 1723 is controlled by the PLC controller. The carbon dioxide output by the decarburization system enters the main vortex distributor 172 through the main gas inlet pipe 171. The electric telescopic pipe 1723 adjusts the insertion depth according to the flow rate: when fully inserted, the gas flow forms a high-speed rotational flow through the first gas nozzles 1725 of the umbrella-type vortex distributor 1724; when partially retracted, the gas flow enters the shunt chamber 1721 through the second through holes and further strengthens the turbulent flow through the tangential gas nozzles of the sub-vortex distributor 174.

[0051] The catalyst packing layer 130 includes a circular ring body 131 with hollow through holes on the upper and lower surfaces, and a corrugated plate type separation screen 132 is arranged in the circular ring body 131. The mesh diameter of the separation screen gradually decreases from top to bottom. The top of the circular ring body 131 is provided with a feeding pipe 133 near the outer circle position. The tank body 110 is provided with a transparent window 134 at the assembly position of the catalyst packing layer 130. At least the circular ring body 131 at the corresponding position of the transparent window 134 is also transparent.

[0052] In order to prevent the motor of the electric telescopic pipe 1723 from being soaked in the liquid phase, the motor is designed at the top of the tank body in the embodiment. Therefore, the corresponding electric telescopic pipe 1723 can be connected with the central chamber of the total vortex distributor 172 through the circular ring body 131. The electric telescopic pipe 1723 can also be arranged at the bottom of the tank body. The design position of the motor of the electric telescopic pipe 1723 is not limited and can be installed at any suitable position. Figure 1

[0053] The catalyst packing layer 130 in the embodiment adopts the corrugated plate type separation screen 132+gradually reduced mesh design. The corrugated plate structure can increase the specific surface area of the catalyst packing and strengthen the gas-liquid-solid three-phase contact. The mesh gradually decreases from top to bottom to form a gradient screening effect, which allows small particle size catalysts to fully react in the upper layer high flow area, prevents the lower layer large particle catalysts from being blocked, ensures uniform distribution of reaction materials, and improves the catalytic oxidation efficiency. The hollow through hole circular ring body 131+top outer edge feeding pipe 133 design is adopted. The upper and lower hollow designs of the circular ring body 131 consider the gas and liquid passing property and the catalyst fixing function to avoid the collapse of the packing layer. The top feeding pipe 133 is located at the outer circle position and can cooperate with the rotating packing layer to realize the partition replenishment of catalysts, without the need to stop the machine for cleaning the tank, thereby reducing the maintenance cost. The transparent window 134 is arranged at the corresponding position of the catalyst packing layer 130 of the tank body 110, which can directly observe the activity state (such as color change and scaling condition) of the catalyst, judge in real time whether it needs to be backwashed or replaced, and avoid the misjudgment risk caused by the traditional blind structure relying on indirect parameters (such as pressure drop).

[0054] The catalyst packing layer 130 is filled with heterogeneous catalysts to ensure that the carbon dioxide from the bottom fully reacts with the waste lye and ensures that the waste lye is completely neutralized. At the same time, the carbon dioxide from the bottom fully mixes the hydrogen peroxide, catalysts and waste lye in the waste water treatment tank, so as to ensure that the COD of the waste lye is reduced by 500 mg / L or less.

[0055] ​Further, the gas-liquid separation layer 140 is provided with a demister 141. The structure of the demister 141 in the embodiment is not limited. In the catalytic oxidation reaction, bubbles (such as carbon dioxide, O2, etc.) entrained in the wastewater and micron-sized liquid foam generated by the decomposition of hydrogen peroxide are easy to form aerosols, resulting in turbidity of the effluent. The demister 141 can efficiently capture liquid droplets with a particle size of ≥5 μm through the collision and interception of multiple layers of wire mesh or baffles, so that the suspended matter concentration of the purified water is reduced by more than 90%, meeting the direct discharge or reuse standards.

[0056] The oxygen bubbles and carbon dioxide gas generated by the catalytic oxidation reaction are easy to form viscous foam with the organic matter in the wastewater. The setting of the demister 141 directly solves the problems of effluent COD rebound and intensified equipment corrosion caused by foam entrainment in the traditional process, reduces the load of the later-stage deep treatment unit (such as activated carbon adsorption), and reduces the comprehensive operation and maintenance cost by 15%-20%.

[0057] The bottom of the tank body 110 is a conical structure, and the bottom of the tank body 110 is provided with a sludge collection hopper with an inclination of ≥60° to prevent bottom crystallization.

[0058] The purified water is discharged from the discharge pipe 160, and the treated wastewater can be directly discharged to a general wastewater station, without causing impact and heavy work burden to the wastewater station.

[0059] Second embodiment

[0060] Please see Figure 3 An amine liquid purification skid-mounted system, comprising a plate heat exchanger 210, a mechanical filter 220, an ultrafiltration filter 230, and an ion exchange tank 240 connected in sequence, and waste liquid generated in the ion exchange tank 240 is connected to the amine liquid purification wastewater treatment tank 100 in the first embodiment through a pipeline.

[0061] The treatment process of the amine liquid purification skid-mounted system is as follows: the lean liquid in the decarbonization system 200 is sent to the amine liquid purification skid, cooled to 35°C through the plate heat exchanger 210, and then the mechanical impurities and deep impurities in the lean liquid are removed through the mechanical filter 220 and the ultrafiltration filter 230; the liquid after the impurity removal treatment is removed to the ion exchange tank 240 to remove the heat-stable salt in the lean liquid, and then returned to the deacidification system. When the ion exchange resin is saturated, the remaining lean liquid in the resin is washed with desalted water, and the resin is regenerated with 3% alkali liquor, and the generated waste liquid is pumped to the wastewater treatment tank through a pipeline; the remaining alkali liquor in the resin is washed with desalted water, and the generated alkali washing water is also sent to the wastewater treatment tank for treatment; the regenerated resin continues to purify the lean liquid.

[0062] This specification describes examples of embodiments of the present application and is not meant to imply that these embodiments are all possible forms of the present application. It should be understood that the embodiments described in the specification can be implemented in a variety of alternative forms. The drawings are not necessarily drawn to scale; some features can be exaggerated or minimized to show details of certain components. The specific structural and functional details disclosed should not be construed as limiting, but merely as representative of the general principles of the present application. Those skilled in the art will appreciate that the features described with reference to any one drawing and description can be combined with features described in one or more other drawings to form embodiments not explicitly described or illustrated. The combined features described provide representative embodiments for typical applications. However, a variety of combinations and variations of features consistent with the teachings of the present application can be used as desired for a particular application or implementation.

[0063] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An amine solution purification wastewater treatment tank comprising a tank body, characterized by, The tank body is sequentially provided with a turbulent flow strengthening layer, a catalyst packing layer and a gas-liquid separation layer from bottom to top, the tank body is filled with hydrogen peroxide, and the hydrogen peroxide at least submerges the catalyst packing layer; wherein the turbulent flow strengthening layer is provided with a gas distribution assembly, an input port of the gas distribution assembly is connected to a carbon dioxide gas output end of a regeneration tower of a decarbonization system, and the catalyst packing layer is filled with a heterogeneous catalyst.

2. The amine solution purification wastewater treatment tank according to claim 1, characterized in that, The gas distribution assembly comprises a gas inlet main pipe, a total vortex distributor, a gas inlet branch pipe and a secondary vortex distributor, the total vortex distributor is arranged at the center of the tank body, the gas inlet main pipe is introduced from the outside of the tank body to the inside of the tank body and connected to the total vortex distributor, the total vortex distributor has a plurality of shunt chambers arranged in a ring array, the contact surfaces between the shunt chambers are provided with first through holes, and each chamber is connected to one of the secondary vortex distributors through a gas inlet branch pipe.

3. The amine solution purification wastewater treatment tank according to claim 2, characterized in that, The total vortex distributor comprises a central chamber and the shunt chambers, an electric telescopic pipe and an umbrella-shaped vortex distributor, the contact surfaces of the central chamber and the shunt chambers are provided with second through holes, the central chamber is provided with the electric telescopic pipe penetrating through the central chamber, the umbrella-shaped vortex distributor in the shape of a cone is arranged at the middle part of the pipe body of the electric telescopic pipe, a plurality of first gas nozzles are arranged on the umbrella-shaped vortex distributor, when the pipe body of the electric telescopic pipe is inserted into the bottom of the central chamber, the pipe body blocks the second through holes, and airflow is sprayed from the central chamber, the electric telescopic pipe and the first gas nozzles.

4. The amine solution purification wastewater treatment tank according to claim 3, characterized in that, The umbrella ribs of the umbrella-shaped vortex distributor are pipe bodies penetrating through the central chamber, and a plurality of first gas nozzles are arranged on each pipe body.

5. The amine solution purification wastewater treatment tank of claim 2, wherein, The secondary vortex distributor is provided with a plurality of gas distribution branch pipes tangent to the outer circle of the secondary vortex distributor, the end of each gas distribution branch pipe is provided with a second gas nozzle, and the second gas nozzle faces the inner wall of the tank body.

6. The amine solution purification wastewater treatment tank of claim 1, wherein, The catalyst packing layer comprises a circular ring body with a hollow through hole on the upper and lower surfaces, and a corrugated plate type separation screen is arranged in the circular ring body, the mesh diameter of the separation screen gradually decreases from top to bottom, and a feeding pipe is arranged at the top of the circular ring body close to the outer circle.

7. The amine solution purification wastewater treatment tank of claim 1, wherein A transparent window is arranged at the assembly position of the catalyst packing layer of the tank body.

8. The amine solution purification wastewater treatment tank of claim 1, wherein, The gas-liquid separation layer is provided with a demister.

9. The amine solution purification wastewater treatment tank of claim 1, wherein, The bottom of the tank body is in a conical structure, and the bottom of the tank body is provided with a sludge collection hopper with an inclination angle ≥60°.

10. An amine solution purification skid system, characterized by, The amine liquid purification skid-mounted system comprises a plate heat exchanger, a mechanical filter, an ultrafiltration filter and an ion exchange tank connected in sequence, and the waste liquid generated in the ion exchange tank is connected to the amine liquid purification wastewater treatment tank through a pipeline.

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