Hedging impinging stream reinforced photocatalytic reactor

Abstract

The utility model discloses a hedging impinging stream reinforced photocatalytic reactor which is of a cylindrical structure, at least one ultraviolet lamp tube is arranged at each of the two ends of the reactor, two baffles for supporting and fixing the ultraviolet lamp tubes are arranged in the reactor, a plurality of water flow through holes for water flow to pass through are formed in the baffles, and the water flow through holes are communicated with the ultraviolet lamp tubes. The baffles are symmetrically arranged, two water inlet pipelines are symmetrically arranged at the two ends of the side wall of the reactor, and a discharge outlet is formed in the middle of the side wall of the reactor. According to the utility model, by forming the hedging impinging stream, the photocatalytic reactor is strengthened, various organic pollutants which are difficult to degrade in wastewater are accelerated to be decomposed into small molecular substances and finally converted into carbon dioxide and water, and meanwhile, the enlargement of the traditional photocatalytic reactor is also realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to photocatalytic reactor technical field, concretely relates to a kind of light catalytic equipment of collision impinging stream catalytic reinforcement. BACKGROUND

[0002] The refractory organic matter in industrial wastewater is generally treated by advanced oxidation process, such as Fenton oxidation method, which uses ferrous ions and hydrogen peroxide to generate strong oxidizing hydroxyl radicals to oxidize and decompose organic matter; biological treatment process, such as biofilm method and anaerobic biological treatment, uses microbial metabolism to decompose organic matter; adsorption method uses activated carbon and other adsorbents to adsorb refractory organic matter by virtue of their porous structure and surface activity; membrane separation technology separates organic matter from water by virtue of the selective permeability of nanofiltration and reverse osmosis membranes.

[0003] Advanced oxidation process usually requires the use of some expensive reagents, such as hydrogen peroxide and ferrous salt in Fenton oxidation method, and the consumption of reagents is large, and a large amount of iron-containing sludge is generated during oxidation process, which requires additional cost and facilities for treatment and disposal, increasing the complexity and cost of treatment. Excessive use of reagents or incomplete reaction may also result in the residual of some chemicals, which may pose potential harm to the environment. The combination of multiple processes may cause secondary pollution: during advanced oxidation process, some intermediate products may be generated, some of which may be toxic or difficult to further degrade, causing secondary pollution.

[0004] Photocatalytic oxidation process makes good use of the reactor to generate a large amount of strong oxidizing substances such as hydroxyl radicals under normal temperature and pressure by exciting oxidizing agents with ultraviolet light source, which can degrade organic matter in wastewater from macromolecules to small molecules, and can also mineralize some organic matter into carbon dioxide and water, which has good removal effect on many organic pollutants that are difficult to treat by traditional methods.

[0005] Traditional photocatalytic reactor mostly adopts the structure design of inserting ultraviolet lamp tube into cylindrical cavity on one side. The ultraviolet lamp tube is generally placed on the central axis of the reaction tube, or closely attached to the outer wall of the reaction tube. Under this structure, the distribution of reactants in the reactor is relatively uniform. The reactor uses the specific wavelength light emitted by the ultraviolet lamp to excite the catalyst loaded in the reactor. The inlet and outlet of the reactor are mostly arranged at both ends, respectively for the input of reactants and the output of products. However, the traditional photocatalytic reactor has obvious disadvantages, and its reaction efficiency is relatively low. The efficient performance of photocatalytic reaction depends on the reasonable layout of light source and reactor, and reasonable design of flow field can fully activate the catalyst by light source, and make the catalyst fully contact with fluid, thereby improving the utilization rate of light. However, the current reactor has the problem of small capacity due to poor cavity layout, which leads to insufficient water treatment capacity, and these defects seriously limit its popularization and large-scale use in industrial application field. Practical new content

[0006] The utility model discloses a kind of to collide impinging stream reinforced photocatalytic reactor, to solve the problem raised in the above background technology.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of to collide impinging stream reinforced photocatalytic reactor, the reactor is cylindrical structure, at least one ultraviolet lamp tube is respectively arranged at its two ends, two baffles for supporting and fixing ultraviolet lamp tube are arranged in the reactor, a plurality of water flow through holes for water flow are arranged on the baffle, the baffle is symmetrically arranged, two water inlet pipes are symmetrically arranged at the side wall of the reactor, and a discharge port is arranged in the middle of the side wall of the reactor.

[0008] Compared with prior art, the utility model has the following beneficial effects:

[0009] (1) the photocatalytic reactor flow field distribution is strengthened, under the help of high-efficiency flow field, various types of stubborn refractory organic pollutants in wastewater can be rapidly decomposed into small molecular substances, and then continuously oxidized, and finally completely converted into carbon dioxide and water, realizing the harmless treatment of pollutants.

[0010] (2) the utility model innovatively breaks through the limitation of traditional photocatalytic reactor, and the ultraviolet lamp tube is installed by horizontal insertion on both sides respectively, and the scale is successfully enlarged, the overall structure is simple and clear, each component is reasonably arranged, the manufacturing and maintenance cost is reduced, the installation process is convenient and efficient, can be quickly put into use, a large amount of wastewater can be treated in unit time, effectively meet the actual demand of large-scale sewage treatment. DETAILED DESCRIPTION

[0011] Figure 1 It is the structure schematic diagram of the utility model;

[0012] Figure 2 It is the baffle schematic diagram in the reactor of the utility model;

[0013] Figure legend: 1-pressure gauge;2-valve;3-flow meter;4-reactor;5-water inlet pipe;6-emptying valve;7-visual observation hole;8-ultraviolet lamp tube;9-baffle;10-discharge port;11-light intensity probe;12-outlet flange pipe;13-water flow through hole;14-fastener opening;15-opening. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments will be described clearly and completely below in combination with the drawings in the embodiments. Obviously, the described embodiments are only part of the embodiments, not all embodiments.

[0015] CombineFigure 1 and Figure 2 The utility model provides a kind of to collide impingement flow reinforced photocatalytic reactor, the reactor 4 is cylindrical structure, at least one ultraviolet lamp tube 8 is separately provided in its two ends, the reactor 4 inside is equipped with two baffles 9 for supporting and fixing ultraviolet lamp tube 8, multiple water flow through holes 13 for water flow are provided on the baffle 9, water flow is steadily propelled in the form of flat push flow in reactor 4, water flow through hole 13 makes fluid in flat push flow move forward like piston, each fluid microelement is identical in the residence time in reactor 4, return mixing phenomenon is avoided at initial stage of water inlet, in the reactor 4, when fluid reaches middle part of cavity, two flat push flows collide accurately, and strong impingement flow is formed instantaneously, and the flow field distribution of reactor 4 is strengthened.

[0016] In a preferred embodiment of the utility model, the reactor 4 is connected with the ultraviolet lamp tube 8 through metric screw thread interface at both ends.

[0017] In a preferred embodiment of the utility model, a plurality of openings 15 for supporting and fixing the ultraviolet lamp tube 8 are uniformly arranged on the baffle 9 in a circumferential direction, the central axis of the baffle 9 is coaxial with the central axis of the reactor 4, and the center distance d between the opening 15 and the baffle 9 is half of the radius r of the baffle 9 (d=0.5r).

[0018] In a preferred embodiment of the utility model, the ultraviolet lamp tube 8 is symmetrically arranged at both ends of the reactor and is uniformly arranged in a circumferential direction.

[0019] In a preferred embodiment of the utility model, the water inlet pipeline 5 is connected with a water inlet system, the water inlet system comprises a pressure gauge 1, a valve 2 and a flowmeter 3, the flowmeter 3 is connected with the water inlet pipeline 5 and is used for monitoring and controlling the water inlet flow, and the pressure gauge 1 is used for visually controlling the water inlet pressure.

[0020] In a preferred embodiment of the utility model, two visual observation holes 7 for observing the internal condition of the reactor 4 are symmetrically arranged on the side wall of the reactor 4, the angle of the visual observation hole 7 is 45° with respect to the horizontal direction, the visual observation hole 7 is a borosilicate flake with a diameter of 16 cm and a thickness of 8 mm.

[0021] In a preferred embodiment of the utility model, four emptying valves 6 are symmetrically arranged on the side wall of the reactor 4, two emptying valves 6 located at the top of the side wall of the reactor 4 are symmetrically arranged left and right, which are used for gas emptying, and two emptying valves 6 located at the bottom of the side wall of the reactor 4 are symmetrically arranged left and right, which are used for waste liquid emptying; the four emptying valves 6 are all arranged on the plane where the central axis of the reactor is located.

[0022] In one preferred embodiment of the utility model, the middle part of the reactor 4 side wall is equipped with a light intensity probe 11 for monitoring the light intensity decay of the ultraviolet lamp 8, and the light intensity probe 11 is arranged in central axis symmetry with the discharge port 10.

[0023] In one preferred embodiment of the utility model, the discharge port 10 is connected with the water outlet flange pipeline 12.

[0024] In one preferred embodiment of the utility model, the baffle 9 is further provided with fastener openings 14 for fixing fasteners, and the baffle 9 is fixed on the reactor 4 side wall through the fasteners.

[0025] In one preferred embodiment of the utility model, in order to make the reactor 4 flow field distribution reinforcement effect more remarkable, the distance from the fastener opening 14 to the center of the baffle 9 is divided into four parts, and a group of water flow through holes 13 is arranged on each of the remaining three annular rings at every 30 degrees of rotation.

[0026] Embodiment

[0027] First, the photocatalytic reactor 4 is connected with the ultraviolet lamp 8 at both ends of the metric screw thread interface, the power supply is connected, the water inlet valve 2 is opened, the wastewater mixed uniformly with hydrogen peroxide is flowed into the reactor 4 from the two-side water inlet pipeline 5, the water flow is monitored and controlled by using the flow meter 3 installed on the water inlet pipeline 5, the water inlet pressure is visually controlled by using the pressure gauge 1 installed on the water inlet pipeline 5, the water flow is smoothly pushed in the reactor 4 in the form of a plane push flow, the water flow through holes 13 on the baffle 9 make the fluid in the plane push flow move forward like a piston, the residence time of each fluid microelement in the reactor 4 is the same, and the back mixing phenomenon is avoided in the initial stage of water inlet, in the reactor 4, when the fluid reaches the middle part of the cavity, the two plane push flows accurately collide, and a strong impinging flow is formed instantaneously, the reactor 4 flow field distribution is strengthened, the wastewater and the catalyst synergistically strengthen the photocatalytic oxidation effect, and the various organic pollutants difficult to degrade in the wastewater are accelerated to be decomposed into small molecular substances and finally converted into carbon dioxide and water. The wastewater treated by the reactor 4 is discharged from the discharge port 10 located at the bottom center of the side wall of the reactor 4, the discharge port 10 is connected with the water outlet flange pipeline 12, and the valve at the tail of the discharge port 10 is in the normally open state during normal operation.

[0028] On the basis of the above embodiment, the internal condition can be observed through the visual observation hole 7 symmetrically arranged on the upper part of the reactor 4 side wall in the embodiment. When the embodiment ends operation, the emptying valves 6 arranged on the reactor 4 are opened, and a total of four emptying valves 6 are arranged, two emptying valves 6 arranged on the top of the reactor side wall are used for gas emptying, and two emptying valves 6 arranged on the bottom of the side wall are used for waste liquid emptying. In the embodiment, the light intensity probe 11 arranged at the top center of the reactor side wall can be used to monitor the light intensity decay of the ultraviolet lamp 8.

[0029] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements can be made to the technical solutions of the present application without departing from the spirit and scope of the present application, and all such modifications or equivalent replacements should be covered in the scope of the claims of the present application.

Claims

1. A counter-impinging jet enhanced photocatalytic reactor, characterized in that, The reactor is a cylindrical structure, at least one UV lamp is arranged at each end of the reactor, two baffles are arranged inside the reactor for supporting and fixing the UV lamp, a plurality of water flow through holes are arranged on the baffles, the baffles are symmetrically arranged, two water inlet pipes are symmetrically arranged at the two ends of the side wall of the reactor, and a discharge port is arranged in the middle of the side wall of the reactor.

2. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, The two ends of the reactor are connected with the UV lamp through a metric screw thread interface.

3. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, A plurality of holes for supporting and fixing the UV lamp are uniformly arranged on the baffle in a circle, the central axis of the baffle is coaxial with the central axis of the reactor, and the distance d between the hole and the center of the baffle is half of the radius r of the baffle.

4. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, The UV lamps are symmetrically arranged at the two ends of the reactor and are uniformly arranged in a circle.

5. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, The water inlet pipe is connected with a water inlet system, and the water inlet system comprises a pressure gauge, a valve and a flowmeter.

6. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, Two visual observation holes for observing the inside of the reactor are symmetrically arranged on the side wall of the reactor, and the angle of the visual observation hole is 45° with the horizontal direction.

7. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, Four emptying valves are symmetrically arranged on the side wall of the reactor, two emptying valves located at the top of the side wall of the reactor are used for gas emptying, and the other two emptying valves located at the bottom of the side wall of the reactor are used for waste liquid emptying.

8. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, A light intensity probe is arranged in the middle of the side wall of the reactor for monitoring the light intensity decay of the UV lamp.

9. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, The discharge port is connected with a water outlet flange pipeline.

10. The impinging jet reinforced photocatalytic reactor of claim 1, wherein, Fastener holes for fixing fasteners are further arranged on the baffle, and the baffle is fixed on the side wall of the reactor through the fasteners.

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