A centrifugal separation type photochemical reaction device and its application

Abstract

The present invention discloses a centrifugal separation type photoreaction device, including a reactor, an illumination component, and a driving component. A flow guide baffle is fixedly arranged in the reactor, and the illumination component is arranged in the center of the reactor. The reactor rotates under the driving of the driving component, driving the flow guide baffle to rotate to generate stirring and centrifugal force, so that the solid precipitate generated in the reactor with the reaction is centrifugally separated and discharged. The photochemical reaction device sets the stirring power outside the reactor, omitting the traditional agitator, avoiding the blocking of light by redundant devices such as stirring rods and paddles, and retaining a larger photoreaction space; through the rotation of the reactor, the inner wall flow guide module is used to stir and drive the water body to produce a centrifugal separation effect, and the original and suspended particles and insoluble solids generated in the wastewater during the reaction are removed by rotating centrifugation, the turbidity of the water body is reduced, the light transmittance of the water body is increased, the light utilization rate is effectively improved, and a series of problems of low efficiency of the photochemical reaction caused by the increase of turbidity during the photochemical reaction are solved. It is particularly suitable for photochemical reactions that produce precipitation during the reaction. The device of the present invention is typically used in the photocatalytic decomposition treatment of complex heavy metal wastewater.

Description

Technical Field

[0001] The invention relates to a centrifugal separation type photochemical reaction device, in particular to utilizing a rotating reaction kettle body with a guide baffle to generate stirring and centrifugal effects, separate and remove precipitates generated by photochemical reactions, and improve photoreaction efficiency, and belongs to the field of photochemical reactors. Background Art

[0002] Some photocatalytic reactions or technologies coupled with photochemical reactions, such as organic synthesis and wastewater treatment, are particularly used in wastewater containing organic matter and heavy metals. Generally, heavy metals are in a complexed state with organic compounds. Photocatalytic oxidation reactions are widely used in the treatment process. This technology has the characteristics of high efficiency and environmental protection. In the process of a type of photochemical reaction, solid precipitates will be produced, resulting in turbidity, which greatly reduces the efficiency of light. In the treatment of industrial wastewater, photocatalytic technology is applied to the oxidation and degradation of various wastewaters containing organic matter or heavy metal complexes. However, due to the high turbidity and chromaticity and poor light transmittance of many wastewaters, especially in the process of breaking the complex of heavy metal wastewater, insoluble solid particles will gradually be generated with light exposure, which cannot be removed by pre-filtration. This will easily lead to insufficient light exposure of some catalysts and target pollutants, and the catalytic oxidation process is not fully activated, resulting in long invalid light exposure time and high reagent consumption rate. Due to the huge electricity consumption and high application difficulty of photoreaction in practical applications, many studies in recent years have been devoted to improving light utilization and reducing costs.

[0003] In the case of precipitation produced during photochemical reactions, or high turbidity of the raw materials themselves, the prior art often adopts measures such as increasing illumination or increasing filtration.

[0004] For example, patent application CN111423041A discloses an automated rotating photocatalytic degradation device for dye wastewater, which uses multiple light sources that are dispersed, built-in and rotated, and is intended to increase the exposure of light to reactants and catalysts. However, since more light sources are simply added, the turbidity of the solution is not actually reduced, which increases the cost of the device and the operating electricity cost. In addition, the rotation of the lamp tube to stir the wastewater can easily cause damage to the light source.

[0005] For example, utility model CN204529551U discloses a photocatalytic and membrane separation combined reactor, which has a good treatment effect on washing wastewater. There are also many reports on various membrane photocatalytic reactors used for wastewater treatment, but they are only suitable for laboratory applications. When faced with complex water components, they are prone to catalyst contamination, membrane clogging and other problems.

[0006] For example, utility model CN208394966U discloses a double-membrane photocatalytic reactor for wastewater treatment. When treating actual complex wastewater, the membrane separation technology is first used to eliminate the influence of suspended matter and insoluble solid particles in the wastewater on the activity of the photocatalyst, improve the transmittance of the wastewater, degrade the pollutants in the wastewater through photocatalytic technology, and then solve the problem of separation of catalyst and wastewater through membrane separation technology to achieve the effect of wastewater purification. The disadvantage is that the overall structure of the double-membrane photocatalytic reactor is complex, the operation is inconvenient, the catalytic efficiency is low, sunlight alone is not enough to fully catalyze the agent, and the cleaning and replacement problems caused by membrane pollution have not been solved. When facing solutions with high turbidity, it leads to problems such as high membrane pressure, increased energy consumption, and decreased flow rate.

[0007] Although centrifugal separation is a commonly used separation method, the mud-water separation process of traditional centrifuges is complicated to operate, the water volume treated is small, the separation and light reaction are carried out in different spaces, and the water is extracted for turbidity reduction treatment and then returned to the light, which will result in long reflux time, reduced light exposure time, ineffective oxidation decomposition, low efficiency, and additional passage through filter membranes or centrifuges resulting in increased costs.

[0008] The above technical solutions are all difficult to solve the technical problem that new turbidity is gradually generated over time during the photocatalytic reaction.

[0009] After a long period of research and development, the inventor has creatively designed the reactor to solve the problem of turbidity during the photoreaction process. It can be widely used in processes with high turbidity during the photoreaction process. As a typical case, it is specifically used in the treatment of complex heavy metal wastewater, organic synthesis and other processes. Summary of the invention

[0010] In view of the problems existing in the prior art, the present invention provides a photoreaction device coupled with centrifugal separation, that is, a photochemical reaction device which can realize centrifugal separation to remove precipitates causing turbidity during the photoreaction process, and provides a photocatalytic decomposition process for complexed heavy metal wastewater with severe turbidity under moderately alkaline conditions in the device, thereby maintaining low turbidity in the water body and improving light utilization.

[0011] The present invention first provides a centrifugal separation photochemical reaction device, including a reactor, an illumination component, and a driving component, characterized in that: the reactor can be rotatably fixed and rotated under the drive of the driving component, a guide baffle is fixedly arranged in the reactor and rotates with the reactor, and the illumination component is arranged in the center of the reactor.

[0012] It further includes an upper fixing component and a supporting base; the upper part of the reactor is provided with an upper opening, the outer periphery of the upper opening is provided with a cylindrical shaft, which can be rotatably fixed to the upper fixing component, the bottom of the reactor is provided with a bottom support rotating shaft, which can be rotatably fixed to the supporting base, an isolation cover is fixedly provided in the reactor and inserted into the reactor, a feeding pipe is provided at the upper opening of the isolation cover, the illumination component is provided in the isolation cover, a flow guide baffle is provided on the inner wall of the reactor, a sediment discharge pipe and a drainage pipe are provided at the lower part of the reactor through the reactor body, and the driving component drives the reactor to rotate through the cylindrical shaft at the outer periphery of the upper opening of the reactor or the bottom support rotating shaft.

[0013] Preferably, the isolation cover is fixed near the upper opening of the reactor, inserted into the reactor, and rotates with the reactor body.

[0014] Furthermore, a groove is provided on the upper part of the isolation cover, a groove opening is provided on the inner side of the groove facing the kettle, a top fixing component is provided above the upper opening, the top of the light source component is fixed to the top fixing component, the feeding pipe is fixed to the top fixing component, and when feeding, the material flows into the groove on the top of the isolation cover and then flows into the reactor.

[0015] Preferably, a top fixing component is arranged above the upper opening, the isolation cover is fixed to the top fixing component, the top of the light source component is fixed to the top fixing component, the feeding pipe is fixed to the top fixing component, and when feeding, the material flows into the feeding pipe, passes through the sealing cylindrical shaft arranged between the upper part of the isolation cover and the side wall of the upper opening of the reactor, and then flows into the reactor.

[0016] Preferably, a top fixing component is arranged above the upper opening, the isolation cover is fixed to the top fixing component, an open gap is arranged between the upper part of the isolation cover and the side wall of the upper opening of the reactor, the top of the light source component is fixed to the top fixing component, the feeding pipe is fixed to the top fixing component, and when feeding, the material flows into the feeding pipe, passes through the open gap, and then flows into the reactor.

[0017] Furthermore, a first concentric rotating slide rail is arranged at the bottom of the reactor, and a second concentric rotating slide rail is arranged correspondingly at the upper part of the supporting base, or a first concentric rotating slide rail is arranged at the upper part of the reactor, and a second concentric rotating slide rail is arranged correspondingly at the upper fixed component, and the first concentric rotating slide rail and the second concentric rotating slide rail are concentric circles and are correspondingly slidably connected with male and female parts.

[0018] Furthermore, according to the load-bearing and stability requirements, a plurality of the above-mentioned pairs of concentric circular tracks can be provided.

[0019] Preferably, the lighting component includes a light source lamp tube, connecting wires, and a shading cover, wherein the shading cover is arranged at the opening portion of the isolation cover, one end of the light source lamp tube is inserted into the isolation cover, and the power terminal of the light source lamp tube is connected to an external power source through a connecting wire and passing through the shading cover.

[0020] Preferably, the guide baffle is composed of a first guide baffle which is evenly and symmetrically arranged on the inner side wall of the reactor and a second guide baffle which is evenly and symmetrically arranged on the bottom of the reactor.

[0021] Furthermore, an air inlet pipe is arranged in the isolation cover, an air inlet port and an air pressure balance component are arranged on the upper part of the isolation cover, an exhaust pipe is arranged on the upper part, an exhaust control valve is arranged on the exhaust pipe, connecting the inside of the reactor with the outside of the reactor, and the air pressure in the reactor is controlled by switching the exhaust control valve.

[0022] Furthermore, the support base, the upper fixing component, and the top fixing component are connected as a whole to the reactor cover of the reactor, and the outer peripheral side wall at the bottom of the reactor cover is provided with an opening to facilitate the discharge of mud and water from the sediment discharge pipe and the drainage pipe.

[0023] The outer peripheral side wall of the bottom of the reactor outer cover may also be open in all directions without a side wall.

[0024] Furthermore, a switchable side panel and a snap-on tooth groove are provided at the opening on the bottom side of the reactor outer cover, an annular mud and water collecting trough is provided around the bottom of the reactor outer cover, the reactor outer cover and the annular mud and water collecting trough are connected by a connecting stand, a mud and water partition plate is provided in the annular mud and water collecting trough, which respectively correspond to the outlet positions of the sediment mud discharge pipe and the drainage pipe, and the mud and water in the trough are discharged and cleared through the collection trough discharge valves provided at the bottom and the side.

[0025] Preferably, the reactor is selected from the group consisting of a dish shape, a frustum, a barrel, and a sphere.

[0026] Furthermore, a cooling well, a lamp tube base, a concentric rotating joint bearing, an inner sleeve bearing of the base, and a rotating joint fixed end are arranged outside the light source lamp tube. The cooling well is arranged outside the light source lamp tube, and is connected to the concentric rotating joint bearing through the lamp tube base, and the rotating joint fixed end is connected to the inner sleeve bearing of the base, so that the internal light source is stationary relative to the supporting base.

[0027] Furthermore, the cooling well is externally connected with a cooling water circulation device upward, and the bottom of the cooling well is fixed by the lamp tube base.

[0028] Preferably, the light source lamp tube is composed of a horizontal lamp tube disk, a central lamp tube, and a lamp tube fixing ring, and the horizontal lamp tube disk and the central lamp tube are fixed to the lamp tube fixing ring; the cooling well is composed of the horizontal disc-shaped cooling water trough and a water-isolating ring, and the water-isolating ring has wire holes evenly distributed, and the wires of the light source lamp tube pass through the wire holes upward through the light-shielding cover to connect to an external power supply.

[0029] A light-transmitting filling tray is arranged in the reactor, and a solid catalyst can be loaded inside the filling tray, which is evenly arranged corresponding to the light source lamp tube.

[0030] The present invention further provides a method for a photochemical reaction, characterized in that the photochemical reaction produces a solid phase precipitate, and the photochemical reaction is run in a centrifugal separation type photochemical reaction device provided by the present invention, comprising the following steps:

[0031] a) adding the photochemical reactants and reaction medium regulator through a feed pipe;

[0032] b) Turn on the light source and start the driving component to rotate the reactor at a certain speed for a certain period of time;

[0033] c) adjusting the rotation speed of the reactor body, centrifugally separating the precipitate produced by the reaction from the reaction solution, and maintaining it for a certain period of time;

[0034] d) Control the mud discharge duct switch to discharge the mud, and control the water discharge duct switch to discharge the reaction solution.

[0035] The present invention also provides another photochemical reaction method, characterized in that the photochemical reaction produces a solid phase precipitate, and the photochemical reaction is run in the centrifugal separation type photochemical reaction device of the present invention, comprising the following steps:

[0036] a) adding the photochemical reactants and reaction medium regulator to a certain volume through a feeding pipe;

[0037] b) Turn on the light source and start the driving component to make the reactor body rotate at a certain speed and maintain it for a certain period of time;

[0038] c) continuously adding the photochemical reactants and reaction medium regulator through a feed pipe;

[0039] d) adjusting the rotation speed of the reactor body to centrifugally separate the precipitate produced by the reaction from the reaction solution to form a slurry;

[0040] e) controlling the switch of the mud discharge conduit to discharge the mud, and controlling the switch of the water discharge conduit to discharge the reaction solution;

[0041] The feeding speed in step c, the rotation speed in step d, and the discharge speed in step e are controlled to maintain the continuous operation of the photochemical reaction.

[0042] The photochemical reaction is photocatalytic complex heavy metal wastewater treatment, photocatalytic decomposition and synthesis reaction of the solid phase.

[0043] Technical effects: Compared with the existing technology, it has the following significant effects:

[0044] 1. The photochemical reaction device of the present invention only needs one set of motor transmission device to drive the reaction kettle body to rotate to achieve rotary stirring and centrifugal separation, expand the light source irradiation space to improve the lighting efficiency, and simultaneously realize multiple functions such as continuous water inlet and dosing, photocatalytic oxidation, real-time turbidity reduction, mud and water drainage, etc.

[0045] Second, the power device is set outside the reactor, and the reactor does not have the stirrer required by traditional reactors, so as to avoid the internal stirring rod, paddle and other redundant devices blocking the light, and have a larger light reaction space and lighting efficiency. It is more effective to apply reflective coating on the inner wall of the reactor.

[0046] 3. The inner wall guide plate is driven to stir and centrifuge the water by rotating the reactor, thereby removing solid particles originally present in the wastewater and generated during the reaction process, reducing the turbidity of the reaction water and effectively improving the utilization rate of light.

[0047] 4. Typically, in the photochemical reaction device of the present invention, when wastewater containing heavy metal complexes is photocatalytically treated under moderately alkaline conditions, the turbidity increases with the reaction due to the breaking of the complex, and there is no need to set up an additional membrane system to avoid problems such as increased costs, membrane pollution, and reduced illumination time. The water body is always in a highly efficient photocatalytic process, and the sedimentation and centrifugal discharge after addition and subtraction of sedimentation can be achieved in an integrated manner.

[0048] 5. Used in general photochemical synthesis reactions. When precipitation products are produced, continuous reactions can be carried out to separate the products, thereby improving lighting efficiency, saving operation time and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings will be described in detail in the detailed description, and the main points of the drawings are briefly described here.

[0050] Figure 1 , is a schematic diagram of the cross-sectional structure of a photochemical reaction device of the present invention, comprising a rotatable reactor, an illumination component arranged in the center of the reactor and protected by an isolation cover, a guide baffle arranged on the inner wall of the reactor, a sediment discharge pipe, a drainage pipe, and a driving component arranged at the bottom of the reactor.

[0051] Figure 2, is a schematic cross-sectional view of a photochemical reaction device of the present invention, wherein Figure 1 The isolation cover in the structure shown is connected to the upper opening of the reactor in a closed sliding and rotating manner, and an air pressure balancing component is added.

[0052] Figure 3 , is a schematic cross-sectional view of a photochemical reaction device of the present invention, wherein Figure 1 In the structure shown in the figure, the isolation cover is fixed near the upper opening of the reactor and rotates together with the reactor. The upper edge of the isolation cover has a groove and the outer periphery has an opening or a pipe. The charging and aeration components inserted therein are fixed to the top fixed component, and the bottom stabilizing component is schematically represented by a partial enlarged diagram.

[0053] Figure 4 , is a schematic cross-sectional view of a photochemical reaction device of the present invention, wherein Figure 1 The reaction device shown in the figure is provided with a base and a set of concentric rotating slide rails. The upper concentric rotating slide rail can be connected to the upper fixed component or to the outer cover (such as the attached Figure 5 as shown).

[0054] Figure 5 , is a schematic cross-sectional view of a photochemical reaction device of the present invention, wherein Figure 1 A reactor cover is added to the reaction device shown, and the upper fixing parts of the support base-reactor upper outer periphery, the isolation cover and the fixing parts of the parts therein are connected into one body. The cover is airtight, and openings are provided on the bottom side corresponding to the mud and water discharge outlets to facilitate mud and water discharge.

[0055] Figure 6 , is a front view of a mud and water collection tank used in the photochemical reaction device of the present invention.

[0056] Figure 7 , which is a top view of a mud and water collection tank used in the photochemical reaction device of the present invention.

[0057] Figure 8 ,for Figure 1 A schematic diagram of the connection method of the mud and water collection tank in the photochemical reaction device of the present invention is shown.

[0058] Fig. 9 , is a schematic diagram of the connection method of the outer cover used in the photochemical reaction device of the present invention to the mud and water collection tank, wherein the collection tank is a mud and water stratification collection method.

[0059] Fig.10 , is a schematic diagram of a light source arrangement method in a photochemical reactor of the present invention, specifically illustrating a connection method of a horizontally placed lamp panel and a catalyst filling panel therein.

[0060] Fig.11 ,for Fig.11A top view of the horizontal lamp panel shown.

[0061] Fig.12 , is a schematic structural diagram of a spherical reactor used in the present invention.

[0062] Fig.13 , is a schematic structural diagram of a barrel-type reactor used in the present invention.

[0063] Fig.14 , to carry out photocatalytic reaction on the photochemical reaction device of the present invention, and to show the effect of turbidity on the water output of the photoreaction decomposition system.

[0064] The symbols used in the drawings are as follows:

[0065] Reactor 1, driving component 2, upper fixing component 3, supporting base 4, upper opening 5, cylindrical shaft 6, bottom supporting rotating shaft 7, base opening 8, isolation cover 9, feeding pipeline 10, air inlet pipe 11, sediment discharge pipeline 12, drainage pipeline 13, first guide baffle 14, second guide baffle 15, top fixing component 16, first concentric rotating slide rail 17, second concentric rotating slide rail 18, air inlet 19, connecting wire 20, light shielding cover 21, groove 22, groove opening 23, exhaust pipe 24, exhaust control Control valve 25, reactor cover 26, switchable side panel 27, snap-on tooth groove 28, annular mud and water collecting trough 29, cooling well 30, lamp tube base 31, concentric rotating joint bearing 32, inner sleeve bearing of base 33, rotating joint fixed end 34, horizontal lamp tube disc 35, central lamp tube 36, lamp tube fixing ring 37, horizontal disc-shaped cooling water trough 38, water-isolating collar 39, wire hole 40, stuffing disc 41, air pressure balancing component 42, collecting trough discharge valve 43, connecting stand 44, mud and water dividing plate 45, sealing cylindrical shaft 46. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention and the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work, through isolation, deformation, step-by-step, and partial non-creative replacement, etc., are within the scope of protection of the present invention.

[0067] In view of the fact that solid products are produced during the reaction and the reaction efficiency is affected, the centrifugal separation reactor of the present invention can be used to separate the solid components in real time during the reaction, thereby achieving the effect of improving the reaction efficiency. A typical example is a photochemical reaction that produces turbidity.

[0068] The inventive concept of the centrifugal separation photochemical reaction device provided by the present invention is to rotate the reactor during the light reaction to produce a centrifugal separation effect, which can separate the precipitate produced during the reaction, and the power drive component is arranged outside the reactor body, and the guide plate is arranged inside the reactor body to have a stirring function, eliminating the stirring paddle in the reactor, and the light source can be arranged symmetrically in the center, greatly improving the lighting efficiency. In this way, a series of problems of low photochemical reaction efficiency caused by increased turbidity during the photocatalytic reaction are solved.

[0069] First of all, the reactor is a three-dimensional rotating body, which can be determined according to the reaction characteristics and reaction processing volume to be processed, and there is no need to limit the specific shape of the cross-section of the symmetry axis. Because the reactor body rotates, it must be a rotating body. The rotating body can be a barrel body with little change in upper and lower diameters, a trapezoidal barrel body with a small upper and a large lower diameter, or a spherical or elliptical body, etc. Considering the centrifugal force generated by rotation, at the same angular velocity, the centrifugal force is proportional to the radius, and the larger the radius, the greater the centrifugal force. Therefore, the overall maximum radius of the reactor barrel body needs to take into account the centrifugal force required for separation, and therefore consider factors such as the pressure that the barrel body material can withstand. It can be within a safe range.

[0070] In order to transmit the driving power, a rotating shaft can be set at the upper opening or the bottom of the reactor, and the power from the motor can be transmitted through a transmission mechanism such as a belt or a gear, and a variable speed motor or a variable speed mechanism can be used to control the rotation speed. There are many implementation methods of the variable speed mechanism in the prior art, which need not be limited, and can be used as needed.

[0071] It is better to set a rotating shaft at the upper mouth for rotation and fixation, which can also be used for power transmission. However, due to stability and space size, it is better to set the power motor and power transmission at the bottom.

[0072] Generally, in order to ensure the stability and load-bearing capacity of the rotating reactor, any available technical measures in the prior art can be adopted. For reactors with relatively small capacity and light weight, load-bearing shafts and bearings can be directly used to transmit power through the shafts.

[0073] Preferably, a base can be provided, and a sliding annular track can be provided between the base and the bottom of the reactor to stably support the reactor, or a pulley or a slide rail can be provided on the side of the reactor to further stabilize the rotation of the reactor body. More than one set of slide rails can be provided as needed.

[0074] In order to control the reaction, it is necessary to add materials, inflate, and deflate. The feeding pipes and inflating components are usually arranged at the upper opening of the reactor. At the same time, in order to protect the light source, prevent the impact of the substances in the reactor and heat generation, a cooling well needs to be installed. Preferably, an isolation cover is arranged downward from the upper opening of the reactor, and the light source component is arranged therein. At this time, the material of the isolation cover is translucent, which is necessary. For example, quartz glass with high ultraviolet transmittance and high strength, at least the corresponding light-emitting part extending into the reactor is translucent, close to the upper opening, needs to be combined with the reactor, and arrangement of adding materials, inflating, etc. is arranged.

[0075] In this way, the isolation cover and the reactor can be combined in at least two ways: the first is that the upper part of the isolation cover is fixedly connected to the vicinity of the opening on the reactor, which is also convenient for making a sealed combination, and the light source and the cooling well, as well as the feeding and inflation, are fixed by a fixed component above the opening on the reactor; the second is that the isolation cover rotates with the reactor, and the components inside the isolation cover are fixed. When arranged in this way, it is necessary to set openings on the isolation cover that connect the inside and outside of the reactor for feeding, inflation, etc. In one embodiment of the present invention, a circumferential groove is set on the upper part of the isolation cover, and the upper edge of the surface (peripheral surface) of the groove facing the reactor is fixedly combined with the reactor, and an opening or a through pipe opening is set at the lower part of the peripheral surface of the groove, and the material is added through the groove when adding material.

[0076] More preferably, a cooling well is provided therein to cool the light source, and the cooling well can be provided beside the light source, and is preferably provided in a set to be placed on the light source. In this case, it is necessary to use a light-transmitting material.

[0077] In another preferred embodiment of the present invention, the isolation cover is together with the light source and the cooling well, and the upper feeding and inflation components are made into a cylindrical head corresponding to the upper opening of the reactor and fixed on the upper fixed component. The upper part of the isolation cover corresponding to the position connected to the reactor is provided with a feeding and inflation channel, which can be a pipe or an opening. The pipe is better. The pipe and the upper part of the isolation cover can be sealed and combined. A control component is installed on the pipe to control the feeding, inflation, deflation and air pressure adjustment.

[0078] Generally, in the embodiments of the present invention, the isolation cover and the upper opening of the reaction kettle can be arranged concentrically, leaving an open gap so that the reaction kettle can rotate freely. In this case, the reaction kettle is open.

[0079] In another embodiment of the present invention, the upper cylindrical portion of the isolation cover is provided with a rotatable outer sleeve, which is clamped on the upper opening of the reactor, for example, a cone with a large upper portion and a small lower portion is used for combination, and a fastener is provided for clamping and clamping. In this case, the reactor can be operated in a closed manner when necessary, for example, when a certain pressure of gas, such as oxygen, is required. In this case, the upper portion of the isolation cover is connected to the feeding and inflation and deflation components, and a constant pressure component is added.

[0080] For the rotation and fixation of the reactor body, the isolation cover, and the components of feeding, inflation, and deflation, external fixing components can be used. Furthermore, in one embodiment of the present invention, a reactor cover is used to rigidly connect the support base with the upper reactor rotation and fixation components, as well as the isolation cover, the lighting component, the feeding, inflation, and deflation fixing components. In this way, the entire reaction device can be independent and does not require additional external fixing components.

[0081] In order to take into account the effects of stirring and centrifugal separation, guide baffles are set on the side walls and bottom of the reactor. Stirring is generated as the reactor body rotates, and centrifugal force is generated by the rotation of the reaction water body. As long as sufficient stirring effect is generated when rotating at a relatively slow speed and effective centrifugal separation effect is generated when rotating at a relatively fast speed, there is no need to be particularly limited. Baffles can also be set on the outer periphery of the isolation cover in the center, which will also have a stirring effect. The number of baffles can be determined based on experiments. Generally, 4 to 8 pieces are used, but it is not limited to this range. The plates are set at a certain angle to the inner wall of the reactor and are evenly distributed along the inner wall of the reactor with the light source as the center. The shape of the plates can be adjusted according to the stirring effect and the centrifugal separation effect. Rectangular, circular, streamlined and other shapes are used. The width and length of the baffles need to consider the centrifugal force required for separation and the pressure that the material can withstand.

[0082] Preferably, the guide baffle is arranged vertically to reduce the water pressure in the same direction as the centrifugal force during the centrifugal process, so as to avoid damage to the guide baffle and extend the service life.

[0083] More preferably, it is set vertically near the inner wall end of the reactor and at a certain angle near the center part, so as to take into account the effects of stirring and centrifugal separation. When centrifugal separation is required, when the rotation speed is increased, the laminar flow formed near the reactor wall is easy to make the solids settle, and the center part of the reactor is conducive to stirring. During centrifugal separation, the laminar flow near the reactor wall has little effect.

[0084] In order to discharge the mud formed by the reaction sediment after centrifugal separation and the reaction water out of the kettle, a mud discharge pipe is set near the bottom of the reactor and a drainage pipe is set up on the upper and lower sides of the reactor. In order to facilitate mud discharge, it is better that the pipe opening of the mud discharge pipe in the reactor is flush with the inner wall of the reactor, and the drainage pipe opening extends into the reactor for a certain distance and is better at the upper part, so as to facilitate the separate discharge of mud and reaction water, which can be collected and processed separately, or even discharged separately. Control components such as valves are installed on the discharge pipe to control the discharge.

[0085] In one embodiment of the present invention, the inlet of the drain pipe is on the side of the reactor close to the light source, and the height and pipe diameter are sufficient to discharge most of the water in the reactor by gravity and centrifugal force. The inlet of the mud discharge pipe is on the side away from the light source, and is arranged horizontally. The inner diameter is not higher than the lowest position height in the reactor, and can discharge the mud accumulated in the reactor or all the substances in the reactor.

[0086] In one embodiment of the present invention, the inlet of the drain pipe is on the side of the reactor close to the light source, and the height and pipe diameter are sufficient to maintain a certain amount of water in the reactor, especially during the continuous water inlet process, to maintain a stable balance of water in the reactor. The inlet of the mud discharge pipe is on the side away from the light source, and is arranged horizontally. The inner diameter is not higher than the lowest point height in the reactor, so as to discharge the mud accumulated in the reactor or all substances in the reactor.

[0087] In one embodiment of the present invention, a switchable side plate is provided on the bottom side of the outer cover of the reactor, and an annular mud and water collecting groove is provided around the bottom of the outer cover of the reactor, corresponding to the opening, to receive the drainage and mud discharge outlet. In another embodiment of the present invention, the lower end of the outer cover of the reactor is fully open and can be directly semi-closedly connected to the annular mud and water collecting groove to realize the collection of discharged water and discharged mud during continuous centrifugation.

[0088] The photochemical reaction device of the present invention is particularly suitable for reactions that produce solid products during the reaction and is particularly necessary for photochemical reactions that require continuous separation and discharge of the solids from the reaction system.

[0089] A typical example is the photocatalytic treatment of complexed heavy metal wastewater, which uses photocatalytic oxidation to force the complexing agent to decompose, resulting in the heavy metal being freed to form hydroxide or oxide precipitation, which reduces the photocatalytic efficiency.

[0090] Undoubtedly, in organic photochemical synthesis reactions, there are also reactions that produce precipitation, or adjusting the reaction conditions to allow the product to precipitate, thereby improving the overall operating efficiency. The effect is particularly significant when running on the device of the present invention.

[0091] The present invention uses complex heavy metal wastewater as a typical case, conducts tests on the device of the present invention, and achieves significant technical effects.

[0092] The specific implementation of the photochemical reaction device of the present invention will be further described in detail below in conjunction with the structure of the device shown in the accompanying drawings of the specification.

[0093] The preferred photochemical reaction device used in the embodiments of the present invention is:

[0094] Attached Figure 1A preferred photochemical reaction device of the present invention is shown, wherein a driving component 2, a supporting base 4, and an upper fixing component 3 are arranged at the bottom of the reactor 1, a central light tube 36 is arranged in the reactor to illuminate the water in the reactor, an upper opening 5 is arranged at the top of the reactor 1, and the outer periphery of the upper opening 5 is arranged as a cylindrical shaft 6, which can be rotatably fixed to the upper fixing component 3, a bottom supporting rotating shaft 7 is arranged at the bottom of the reactor 1, which can be rotatably fixed to the supporting base 4, the driving component 2 is externally connected to the power motor and the power transmission device, arranged at the bottom of the reactor 1, and connected to the bottom supporting rotating shaft 7 through the base opening 8 of the reactor 1 The shaft 7 drives the reactor 1 to rotate; an isolation cover 9 is fixedly arranged inside the reactor 1 and inserted into the reactor 1, a central light tube 36 is arranged in the isolation cover 9, and a cooling well 30 is arranged on the outer layer of the central light tube 36 to cool and protect the components; a top fixing component 16 is arranged above the upper opening 5, the isolation cover 9 is fixed on the top fixing component 16, the top of the central light tube 36 is fixed on the top fixing component 16, and the power terminal of the central light tube 36 is connected to an external power source by passing through a light shielding cover 21 at the center of the top fixing component 16 through a connecting wire 20, and the top light shielding cover 21 remains closed during the illumination of the reaction. An opening is provided between the upper portion of the isolation cover 9 and the side wall of the upper opening 5 of the reactor 1, and a feeding pipe 10 is fixed to the top fixing component 16. When feeding, the material flows into the feeding pipe 10, passes through the opening between the upper portion of the isolation cover 9 and the side wall of the upper opening 5, and then flows into the reactor 1; a first guide baffle 14 is evenly and symmetrically provided on the center of the inner wall of the reactor 1, and a second guide baffle 15 is evenly and symmetrically provided on the center of the inner bottom of the reactor 1. In the figure, the first guide baffle 14 is an integrated whole light-transmitting baffle, which can have a variety of shape changes. The lower part of the reactor 1 is provided with a sediment discharge pipe 12 and a drainage pipe 13 through the reactor body. The inlet of the drainage pipe 13 is located near the central lamp 36 in the reactor 1. The height and diameter of the pipe are sufficient to discharge most of the water in the reactor 1 by gravity and centrifugal force, or to maintain a certain amount of water in the reactor, especially in the process of continuous water inflow, to maintain a stable balance of the water volume in the reactor 1. The inlet of the sediment discharge pipe 12 is located on the side away from the central lamp 36, and is arranged horizontally. The bottom of the inner diameter is not higher than the lowest point of the inner wall of the reactor 1, and the accumulated mud in the reactor or all the substances in the reactor can be discharged. The air inlet pipe 11 and the air inlet 19 are arranged in the isolation cover 9 to aerate the water in the reactor 1. The upper opening 5 is an open setting, and there is no need to set a separate exhaust pipe at this time.

[0095] Attached Figure 2 A preferred embodiment of the reaction device is shown, and the attached Figure 1Compared with the reaction device shown, the device is changed to an isolation cover 9 and the upper opening of the reactor 1 are connected in a closed sliding rotation, the feeding pipe 10 is fixed to the top fixing component 16, and the upper opening 5 of the reactor 1 is sealed and covered by the sealing cylindrical shaft 46. When feeding, the material flows into the feeding pipe 10 and passes through the sealing cylindrical shaft 46 set between the upper part of the isolation cover 9 and the side wall of the upper opening 5, and then flows into the reactor 1. The air pressure balance component 42 is added to the isolation cover 9 to connect to the exhaust pipe 24, and the exhaust control valve 25 is used to control the gas discharge and maintain the air pressure in the reactor 1. The first guide baffle 14 is a multi-porous light-transmitting baffle, and the hole shape is polygonal, circular or other shapes.

[0096] Attached Figure 3 A preferred embodiment of the reaction device is shown, and the attached Figure 1 Compared with the reaction device shown, the isolation cover 9 is fixedly arranged near the upper opening of the reactor 1, inserted into the reactor 1, and rotates with the reactor body. A groove 22 is arranged on the upper part of the isolation cover 9, and a groove opening 23 is arranged on the inner side of the groove facing the reactor. A top fixing component 16 is arranged above the upper opening 5, and the top of the central lamp tube 36 is fixed to the top fixing component 16. The feeding pipe 10 is fixed to the top fixing component 16. When feeding, the material flows into the groove 22 through the feeding pipe 10 and then flows into the reactor 1. An air pressure balance component 42 is arranged on the top of the isolation cover 9 to connect the two sides of the isolation cover 9 to maintain air pressure balance. Preferably, in order to further maintain the overall stability of the illumination component, a stabilizing component I can be added to stabilize the illumination component in the reactor. The upper part of the component is connected to the bottom end of the cooling well 30, and the lower part is connected to the bottom of the reactor 1. The middle part rotates relatively stably through the bearing. The stabilizing component 1 is provided with a lamp base 31, a concentric rotary joint bearing 32, a base inner sleeve bearing 33, and a rotary joint fixed end 34. The lamp base 31 is connected to the concentric rotary joint bearing 32, and the rotary joint fixed end 34 is connected to the base inner sleeve bearing 33, so that the internal light source is stationary relative to the supporting base 4. Preferably, the first guide baffle 14 can be arranged as a plurality of light-transmitting baffles at intervals.

[0097] Attached Figure 4 A preferred embodiment of the reaction device is shown, and the attached Figure 1 Compared with the reaction device shown, a first concentric rotating slide 17 arranged at the bottom of the reactor 1 and a second concentric rotating slide 18 on the support base 4 are added. The first concentric rotating slide 17 and the second concentric rotating slide 18 are concentric circles, and the male and female correspondingly slide in connection. Further, the first concentric rotating slide 17 can also be arranged at the top of the reactor 1, and the second concentric rotating slide 18 can be arranged at the upper fixed component 3. The rotating slides can be arranged in multiple groups according to factors such as the size and weight of the reactor 1 to increase the stability of the rotation of the reactor 1.

[0098] Attached Figure 5 A preferred embodiment of the reaction device is shown, and the attached Figure 1 Compared with the reaction device shown, a reactor cover 26 is arranged outside the reactor 1, and a switchable side panel 27 and a snap-on tooth groove 28 are arranged at the bottom of the reactor cover 26. The switchable side panel 27 can be opened to perform internal inspection and maintenance, cleaning, and water and mud discharge switch operations.

[0099] Preferably, the support base 4, the upper fixing component 3, and the top fixing component 16 can be connected to the reactor cover 26 as a whole to protect the interior.

[0100] Attached Figure 6 The bottom of the reaction device of a preferred embodiment is shown as an annular mud and water collecting tank 29 connected to the bottom. A mud and water partition plate 45 is arranged in the tank to connect to the drainage and mud discharge outlets respectively. The mud and water in the annular mud and water collecting tank 29 can be discharged and cleared through the collecting tank discharge valve 43 arranged at the bottom and the side.

[0101] Attached Figure 7 A top view of an annular muddy water collecting tank 29 to which a reaction device is connected according to a preferred embodiment is shown.

[0102] Attached Figure 8 A preferred embodiment of the reaction device is shown, and the attached Figure 1 Compared with the reaction device shown, an annular mud and water collection tank 29 is connected at the bottom to achieve mud and water separation and collection.

[0103] Attached Fig. 9 A preferred embodiment of the reaction device is shown, and the attached Figure 5 and 9 Compared with the reaction device shown, the connection method between the reactor cover 26 and the annular mud and water collecting tank 29 is different. The bottom of the reactor cover 26 is open in all directions and is connected to the annular mud and water collecting tank 29 through a connecting stand 44.

[0104] Attached Fig.10 A preferred embodiment of the reaction device is shown, and the attached Figure 1 Compared with the reaction device shown, the illumination component is composed of a horizontal lamp tube disc 35, a central lamp tube 36, and a lamp tube fixing ring 37. The horizontal lamp tube disc 35 is used as an internal light source uniform distribution scheme and is also part of the present invention, and cooperates with the central lamp tube 36 to increase the light radiation illumination at each point in the reactor 1. If necessary, the required solid catalyst can be filled in the filling disc 41, and the three light sources of the upper and lower layers of lamp tubes and the central lamp tube 36 can also realize the omnidirectional irradiation distribution of the light in the reactor. Preferably, the first guide baffle 14 can be adaptively adjusted.

[0105] Attached Fig.11 For attachment Fig.10The top view of the horizontal lamp tube disc 35 shown in the figure is optimized, including a horizontal disc-shaped cooling water trough 38, a water-isolating collar 39, and a wire hole 40. The horizontal lamp tube disc 35 and the central lamp tube 36 are fixed to the lamp tube fixing ring 37, and fixed to the isolation cover 9 through the lamp tube fixing ring 37; the cooling system of the horizontal lamp tube disc 35 is composed of a horizontal disc-shaped cooling water trough 38 and a water-isolating collar 39, and the wires of the light source lamp tube pass through the wire holes 40 evenly distributed on the water-isolating collar upward through the light shielding cover 21 to connect to the external power supply.

[0106] Attached Fig.12 A preferred embodiment of the reaction device is shown, and the attached Figure 1 Compared with the reaction device shown, the shape of the reactor 1 can be changed and set to a centrally symmetrical sphere. At this time, since the centrifugal force is strongest at the maximum radius, the sediment is gathered in the sediment discharge pipe 12 set at the maximum radius and discharged to the outside of the reactor in a single direction. The drainage pipe 13 is still set at the bottom of the reactor 1, and the first guide baffle 14 can be adaptively changed according to the shape of the reactor body to achieve the best target effect.

[0107] Attached Fig.13 A preferred embodiment of the reaction device is shown, and the attached Figure 1 and 12 Compared with the reaction device shown, the shape of the reactor 1 can be changed and set to a centrally symmetrical cylindrical shape. The first guide baffle 14 can be adaptively changed according to the shape of the reactor body to achieve the best target effect.

[0108] The above-mentioned preferred photochemical reaction device can effectively curb the influence of turbidity generated by the reaction on shielding light. The following are several embodiments of the present invention to illustrate the immediate effect of the device of the present invention.

[0109] Attached Fig.14 The results of the photochemical reaction running on a conventional tubular photoreactor, i.e., Example 3 below, show the effect of turbidity on the photocatalytic decomposition reaction, indicating that the higher the turbidity, the worse the decomposition effect and the worse the illumination effect. The centrifugal separation photochemical reaction device of the present invention can reduce turbidity and overcome the defects of conventional photoreactors.

[0110] Example 1: Photocatalytic oxidation treatment of complex heavy metal wastewater (intermittent operation)

[0111] In the attached Figure 1 On the reaction device shown, proceed as follows:

[0112] 1 In the intermittent reaction operation, the sediment discharge pipe 12 and the drainage pipe 13 at the bottom of the reactor 1 can be separately provided with external valves to keep them open or closed. During the reaction, the valves of the sediment discharge pipe 12 and the drainage pipe 13 are closed. After the reaction is completed, the valve of the drainage pipe 13 is opened to discharge the effluent first, and then the sediment discharge pipe 12 is opened to discharge the sludge;

[0113] 2. After starting the water circulation in the cooling well 30, turn on the light source and preheat the central lamp 36 for 5-10 minutes;

[0114] 3. Open the feeding pipe 10, and feed water and feed enter the reactor 1 through different feeding pipes 10;

[0115] 4. After the light source is in place, the motor is started to drive the reactor 1 to react. The speed of the reactor 1 is 800-5000 r / min. The first guide baffle 14 and the second guide baffle 15 can quickly drive the wastewater in the reactor to stir and generate centrifugal motion. The reaction time is 0.2-1 h.

[0116] 5. During the reaction, air is introduced through the air inlet pipe 11 and the air inlet 19, and the gas in the reactor 1 is connected to the outside through the upper opening 5 to maintain the balance of internal and external air pressures;

[0117] 6. The effluent and sludge are discharged and collected through the sediment discharge pipe 12 and the drainage pipe 13 respectively;

[0118] 7. After the reaction process is completed, drain and rinse the reactor 1, close the valves of the sediment discharge pipe 12 and the drainage pipe 13, turn off the light source power supply and the water circulation of the cooling well 30, so that the reaction device is in the reset state at the beginning of step 1.

[0119] Example 2: Photocatalytic treatment of wastewater containing complex heavy metals (continuous operation):

[0120] In the attached Figure 1 On the reaction device shown, proceed as follows:

[0121] 1. In the continuous reaction operation, the sediment discharge pipe 12 and the drainage pipe 13 at the bottom of the reactor 1 can be separately provided with external valves to keep them open or closed. The height of the water inlet position of the drainage pipe 13 changes to maintain a certain amount of water in the reactor 1. By adjusting the size of the valve opening, the continuous inlet and outlet water balance under certain water inlet and rotation speed conditions can be achieved. During the reaction, the valve of the sediment discharge pipe 12 is closed, and the periodic manual discharge or the valve is controlled to achieve regular automatic discharge.

[0122] 2. After starting the water circulation in the cooling well 30, turn on the light source and preheat the central lamp 36 for 5-10 minutes;

[0123] 3. Open the feeding pipe 10, and feed water and feed enter the reactor 1 through different feeding pipes 10;

[0124] 4. After the light source is in place, the motor is started to drive the reactor 1 to react. The speed of the reactor 1 is 800-5000 r / min. The first guide baffle 14 and the second guide baffle 15 can quickly drive the wastewater in the reactor to stir and generate centrifugal motion, and continuously run for a certain period of time;

[0125] 5. During the reaction, air is introduced through the air inlet pipe 11 and the air inlet 19, and the gas in the reactor 1 is connected to the outside through the upper opening 5 to maintain the balance of internal and external air pressures;

[0126] 6. The effluent and sludge are discharged and collected through the sediment discharge pipe 12 and the drainage pipe 13 respectively;

[0127] 7. After the reaction cycle is completed, drain and rinse the reactor 1, keep the valves of the sediment discharge pipe 12 and the drainage pipe 13 open, turn off the light source power supply and the water circulation of the cooling well 30, so that the reaction device is in the reset state at the beginning of step 1.

[0128] Example 3: Experiment on the effect of turbidity on effluent effect in the treatment of Ni-EDTA complexed heavy metal wastewater

[0129] Ni-EDTA complex heavy metal wastewater is wastewater containing the complex of ethylenediaminetetraacetic acid (EDTA) containing heavy metal nickel (Ni). The traditional tube-type photoreactor is used to degrade Ni-EDTA complex heavy metal wastewater and investigate the effect of turbidity on the degradation effect. The specific steps are as follows:

[0130] 1. Prepare Ni-EDTA wastewater with pure water at a concentration of 1 mmol / L, the dosage of hydrogen peroxide is 50 mmol / L, the dosage of Fe(Ⅲ) is 0.1 mmol / L, the solution pH is controlled at 7.0, and the temperature is 25 ℃; the turbidity is regulated by adding Fe(OH)3, and is set to 0.05 mmol / L, 0.1 mmol / L, 0.2 mmol / L, 0.5 mmol / L, 1 mmol / L, 1.5 mmol / L, and 2mmol / L, respectively.

[0131] 2. Preheat a 500 W mercury lamp for 10 min, and take 50 mL of Ni-EDTA complexed heavy metal wastewater and put it into a 50 mL standard photoreaction quartz tube;

[0132] 3. Allow the photodegradation reaction to proceed under mercury lamp irradiation for 30 min. After completion, measure the turbidity (unit: NTU) using a turbidity meter.

[0133] 4. After the photolysis reaction is completed for 30 min, samples are taken and NaOH is added to adjust the pH to 12 for precipitation. After stirring for 30 min, the supernatant is filtered and diluted with dilute nitric acid. The absorbance is determined by atomic flame absorption spectrophotometry and the residual Ni(Ⅱ) content is calculated.

[0134] The influence of different turbidities on the residual Ni(II) concentration in the effluent obtained in this example is shown in Fig.14 As the turbidity of the solution increased, the concentration of residual Ni(Ⅱ) in the effluent gradually increased, and the removal rate decreased from 99.4% to 59.1%. It can be seen that turbidity has a significant effect on the photoreaction system.

[0135] Example 4: Effects of relevant parameters on turbidity and nickel content of effluent in the treatment of Ni-EDTA complexed heavy metal wastewater

[0136] This example uses the attached Figure 1 The photochemical reaction device shown in the embodiment 1 adopts the intermittent operation mode to treat the simulated Ni-EDTA complex heavy metal wastewater. The bottom diameter (inside) of the reactor 1 is 600 mm, the top diameter (inside) is 300 mm, the height (inside) is 400 mm, the working speed is set to 800, 3000, 5000 r / min (steplessly adjustable), the motor power is 5 kW, and the mercury lamp power is 1 kW. Under neutral conditions, the UV / Fe(III) / H2O2 process is used for 20 min, 40 min, and 60 min, and the steps are as follows:

[0137] 1. Prepare Ni-EDTA wastewater with pure water, the inlet height is 300 mm, the inlet concentration is 1 mmol / L, the solution pH is 7.0, the temperature is 25 ℃, and the hydrogen peroxide dosage is controlled to be 50 mmol / L and the Fe(Ⅲ) dosage is 1 mmol / L by inlet dosing;

[0138] 2. Preheat the mercury lamp for 10 minutes, and then control the operation at different speeds or turn off the centrifugal rotation to allow photocatalytic complex breaking reaction to occur under the irradiation of the mercury lamp. After the reaction, take out the water from the outlet and measure its turbidity using a turbidity meter.

[0139] 3. Take out the water from the outlet separately, add NaOH solution to adjust the pH to 12 for precipitation, stir for 10 minutes and let it stand, take the supernatant and filter it, dilute it with dilute nitric acid, and determine the remaining Ni(Ⅱ) concentration in the solution by atomic flame absorption spectrophotometry, and determine the remaining Ni-EDTA concentration by high performance liquid chromatography.

[0140] When the centrifugal rotation was not started in step 2, the degradation efficiency of Ni-EDTA was 76.94% within 20 min of operation time, the effluent turbidity was 268 NTU at the end of the reaction, and the Ni(Ⅱ) removal rate was 85.47% after effluent sedimentation treatment;

[0141] When the centrifugal rotation was turned on in step 2 and the speed was set to 800 r / min, Ni-EDTA was completely degraded within 20 min of operation time, the effluent turbidity was 3.89 NTU, and the Ni(Ⅱ) removal rate was 98.7%. After 40 min of operation time, the effluent turbidity was further reduced to 0.41 NTU, and the Ni(Ⅱ) removal rate was 99.7%. After 60 min of operation time, the effluent turbidity was further reduced to below 0.1 NTU, and the Ni(Ⅱ) removal rate was 99.7%.

[0142] When the centrifugal rotation was turned on in step 2 and the speed was set to 3000 r / min, Ni-EDTA was completely degraded within 20 minutes of operation, the effluent turbidity reached below 0.1 NTU, and the Ni(Ⅱ) removal rate was 98.9%. After 40 minutes of operation, the Ni(Ⅱ) removal rate was further increased to 99.7%. After 60 minutes of operation, the Ni(Ⅱ) removal rate was further increased to 99.8%.

[0143] When the centrifugal rotation was turned on in step 2 and the speed was set to 5000 r / min, Ni-EDTA was completely degraded within 20 minutes of operation, the effluent turbidity reached below 0.1 NTU, and the Ni(Ⅱ) removal rate was 98.6%. After 40 minutes of operation, the Ni(Ⅱ) removal rate in the effluent was further increased to 99.7%. After 60 minutes of operation, the Ni(Ⅱ) removal rate in the effluent was further increased to 99.9%.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are preferred implementation modes of the present invention, rather than limiting the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit of the technical solutions of the embodiments of the present invention.

Claims

1. A centrifugal photochemical reaction device, comprising a reaction vessel, an illumination component, a driving component, an upper fixing component, and a supporting base, characterized in that: The reactor is rotatably fixed and rotates under the drive of the driving component. A guide baffle is fixedly arranged in the reactor and rotates with the reactor. The illumination component is arranged in the center of the reactor. An upper opening is arranged on the upper part of the reactor, and the outer periphery of the upper opening is arranged as a cylindrical shaft and can be rotatably fixed to the upper opening fixing component. A bottom support rotating shaft is arranged at the bottom of the reactor and can be rotatably fixed to the supporting base. An isolation cover is fixedly arranged in the reactor and inserted into the reactor. A feeding pipe is arranged on the upper opening of the isolation cover, and the illumination component is arranged in the isolation cover. A guide baffle is arranged on the inner wall of the reactor. A sediment discharge pipe and a drainage pipe are arranged through the reactor body at the lower part of the reactor. The driving component drives the reactor to rotate by connecting the cylindrical shaft on the outer periphery of the upper opening of the reactor or the bottom support rotating shaft; the guide baffle is composed of a first guide baffle symmetrically arranged on the inner side wall of the reactor and a second guide baffle symmetrically arranged on the bottom of the reactor.

2. A centrifugal separation photochemical reaction device according to claim 1, characterized in that: The isolation cover is fixed near the upper opening of the reactor and inserted into the reactor, and rotates with the reactor body. A groove is arranged on the upper part of the isolation cover, and a groove opening is arranged on the inner side of the groove facing the reactor. A top fixing component is arranged above the upper opening, and the top of the illumination component is fixed to the top fixing component. The feeding pipe is fixed to the top fixing component. When feeding, the material flows into the groove at the top of the isolation cover and then flows into the reactor through the groove opening.

3. A centrifugal separation photochemical reaction device according to claim 1, characterized in that: A top fixing component is arranged above the upper opening, the isolation cover is fixed to the top fixing component, a sealing cylindrical shaft is arranged between the upper part of the isolation cover and the side wall of the upper opening of the reactor, the top of the illumination component is fixed to the top fixing component, the feeding pipe is fixed to the top fixing component, and when feeding, the material flows into the feeding pipe, passes through the sealing cylindrical shaft, and then flows into the reactor; or, A top fixing component is arranged above the upper opening, the isolation cover is fixed on the top fixing component, an open gap is arranged between the upper part of the isolation cover and the side wall of the upper opening of the reactor, the top of the illumination component is fixed on the top fixing component, the feeding pipe is fixed on the top fixing component, and when feeding, the material flows into the feeding pipe, passes through the open gap, and then flows into the reactor.

4. The centrifugal separation photochemical reaction device according to claim 1, characterized in that: It comprises at least one pair of slide rails, which are composed of a first concentric rotating slide rail arranged at the bottom of the reactor and a second concentric rotating slide rail arranged correspondingly at the upper part of the support base; and / or, The reactor is composed of a first concentric rotating slide rail arranged on the upper part, and a second concentric rotating slide rail arranged correspondingly at the upper fixed component; the first concentric rotating slide rail and the second concentric rotating slide rail are concentric circles, and are connected with male and female corresponding sliding connections.

5. The centrifugal separation photochemical reaction device according to claim 1, characterized in that: The lighting component includes a light source lamp tube, connecting wires, and a shading cover. The shading cover is arranged on the opening of the isolation cover. One end of the light source lamp tube is inserted into the isolation cover. The power terminal of the light source lamp tube is connected to an external power source through the connecting wire and the shading cover.

6. The centrifugal separation photochemical reaction device according to claim 1, characterized in that: An air inlet pipe is arranged in the isolation cover, an air inlet and an air pressure balance component are arranged on the upper part of the isolation cover, an exhaust pipe is arranged on the upper part, an exhaust control valve is arranged on the exhaust pipe, the inside of the reactor is connected with the outside of the reactor, and the air pressure in the reactor is controlled by switching the exhaust control valve.

7. The centrifugal separation photochemical reaction device according to any one of claims 1 to 6, characterized in that: A reaction kettle outer cover is also provided, which is formed by connecting the support base, the upper fixing component and the top fixing component into one body. The outer peripheral side wall at the bottom of the reaction kettle outer cover is provided with an opening to facilitate the discharge of mud and water from the sediment discharge pipe and the drainage pipe.

8. A centrifugal separation photochemical reaction device according to claim 7, characterized in that: A switchable side panel and a snap-on tooth groove are arranged at the opening on the bottom side of the reactor outer cover, an annular mud and water collecting trough is arranged around the bottom of the reactor outer cover, the reactor outer cover and the annular mud and water collecting trough are connected by a connecting stand, a mud and water partition plate is arranged in the annular mud and water collecting trough, which respectively correspond to the outlet positions of the sediment mud discharge pipe and the drainage pipe, and the mud and water in the trough are discharged and cleared through the collection trough discharge valves arranged at the bottom and the side.

9. A centrifugal separation photochemical reaction device according to claim 8, characterized in that: The reactor is selected from the group consisting of a dish shape, a frustum, a barrel, and a sphere.

10. The centrifugal separation photochemical reaction device according to claim 5, characterized in that: A cooling well, a lamp tube base, a concentric rotating joint bearing, an inner sleeve bearing of the base, and a rotating joint fixed end are arranged outside the light source lamp tube. The cooling well is arranged outside the light source lamp tube, and is connected to the concentric rotating joint bearing through the lamp tube base, and the rotating joint fixed end is connected to the inner sleeve bearing of the base, so that the internal light source is stationary relative to the supporting base.

11. A centrifugal separation photochemical reaction device according to claim 10, characterized in that: The cooling well is externally connected with a cooling water circulation device upward, and the bottom of the cooling well is fixed by the lamp tube base.

12. The centrifugal separation photochemical reaction device according to claim 10, characterized in that: The light source lamp tube is composed of a horizontal lamp tube plate, a central lamp tube, and a lamp tube fixing ring, and the horizontal lamp tube plate and the central lamp tube are fixed to the lamp tube fixing ring; the cooling well is composed of a horizontal disc-shaped cooling water trough and a water-isolating ring, and the water-isolating ring is evenly distributed with wire holes, and the wires of the light source lamp tube pass through the wire holes upward through the light-shielding cover to connect to an external power supply.

13. The centrifugal separation photochemical reaction device according to claim 1, characterized in that: A light-transmitting filling tray is arranged in the reactor, and a solid catalyst can be loaded inside the filling tray, which is evenly arranged correspondingly to the illumination component.

14. A method for photochemical reaction, characterized in that The photochemical reaction produces a solid precipitate. Running the photochemical reaction in any one of the centrifugal separation photochemical reaction devices of claims 1 to 13 comprises the following steps: Add photochemical reactants and reaction medium regulators through the feed pipe. Turn on the light source, start the driving component to make the reactor rotate at a certain speed, and react for a certain time. Adjust the rotation speed of the kettle to centrifuge the precipitate produced by the reaction from the reaction solution and keep it for a certain period of time. The mud discharge conduit switch is controlled to discharge the mud, and the water discharge conduit switch is controlled to discharge the reaction solution.

15. A method for photochemical reaction, characterized in that The photochemical reaction produces a solid precipitate. Running the photochemical reaction in any one of the centrifugal separation photochemical reaction devices of claims 1 to 13 comprises the following steps: a) adding the photochemical reactants and reaction medium regulator to a certain volume through a feeding pipe, b) Turn on the light source and start the driving component to make the reactor rotate at a certain speed for a certain period of time. c) continuously adding the photochemical reactants and reaction medium regulator through a feed pipe, d) Adjust the rotation speed of the reactor to centrifuge the precipitate produced by the reaction from the reaction solution to form a slurry. e) controlling the switch of the mud discharge conduit to discharge the mud, and controlling the switch of the water discharge conduit to discharge the reaction solution, Control the addition rate of the photochemical reactants and reaction medium regulators described in step c, control the rotation speed of the reactor body described in step d, and control the discharge speed of the slurry and the discharge speed of the reaction solution described in step e to maintain the continuous operation of the photochemical reaction.

16. A method for photochemical reaction according to any one of claims 14 or 15, characterized in that: The photochemical reaction is photocatalytic complexation of heavy metal wastewater treatment, photochemical decomposition to produce a solid phase, or a photosynthetic reaction.

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