Rotating packed bed with a new structure

Abstract

The application relates to the technical field of organic wastewater treatment, and discloses a rotary packing bed with a novel structure, which comprises a shell, the upper end surface of the shell is provided with a driving mechanism, the outer surface of the shell is provided with a gas inlet, the upper and lower end surfaces of the shell are respectively provided with a gas outlet and a liquid outlet, and the center of the shell is provided with a tubular liquid distributor. The application has a reasonable structure, the centrifugal force received by the gas in the bed layer is small, so that the gas continues to flow in the axial direction, the baffle is arranged on the rotary shaft, the ozone can flow in the bed layer in an S shape, the flowing mode of the gas in the rotor is changed, the turbulence degree of the gas in the bed layer is improved, the local vortex and forced turbulence of the gas appear near the plate layer, the residence time of the ozone in the bed layer is increased by about 20%, the gas-liquid contact is improved, the ozone utilization rate is further improved, the purpose of reducing energy consumption is achieved, and the organic wastewater can be discharged up to the standard.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of organic wastewater treatment, in particular to a rotating packed bed with a novel structure. BACKGROUND

[0002] With the global water crisis gradually significant, the supply of fresh water resources is declining, and reuse water has become the main way to alleviate the fresh water crisis. Organic wastewater, as one of the important sources of reuse water, has the characteristics of high organic matter content (COD Cr ≥2000mg / L), complex composition, high color and odor, and difficult biodegradation.

[0003] Using advanced oxidation processes (AOPs) to treat organic wastewater reuse water can meet the removal of refractory organic matter in reuse water and improve the biodegradability of pollutants in water, improving the treatment effect.

[0004] Among them, the ozone oxidation method has the characteristics of high degradation efficiency and no secondary pollution, and its process includes direct reaction and indirect reaction: the direct reaction of ozone has high selectivity and low reaction rate; and the indirect reaction can produce non-selective hydroxyl radicals, which can react with most organic matter and completely mineralize it into carbon dioxide and water, with better oxidation capacity and reaction speed. Therefore, the key problem of degrading organic pollutants is how to produce more active and non-selective ·OH;

[0005] In recent years, catalytic ozone oxidation technology has been widely studied and applied due to its strong oxidation ability, effective reduction of ozone dosage, and improvement of organic matter mineralization rate. The catalysts used in catalytic ozone oxidation technology can be divided into two categories: homogeneous catalysts and heterogeneous catalysts. Non-homogeneous ozone catalysts mainly include solid metals, metal oxides, metals or metal oxides supported on carriers, and natural minerals. Compared with homogeneous catalysts, non-homogeneous catalysts have the characteristics of easy separation and good reusability, which not only avoids the loss of catalysts and environmental pollution, but also reduces the cost of water treatment, and thus has good development prospects in the field of deep treatment of wastewater.

[0006] However, since ozone is less soluble in liquid phase, and there is a problem of mass transfer limitation at the gas-liquid interface, a reaction device with high shear and strong turbulence characteristics can increase the contact area between gas and liquid phases, strengthen ozone mass transfer, and improve the heterogeneous catalytic ozone oxidation process; High gravity technology (High Gravity Technology, Higee) is a new type of chemical process intensification technology. In the multiphase contact reaction process, the high-speed rotating rotor generates centrifugal force to simulate the supergravity field. The liquid is sheared into liquid elements (liquid film, liquid droplet and liquid filament) under the condition of high dispersion, high turbulence, strong mixing and easy interface renewal, which changes the flow pattern of the multiphase interface and increases the contact surface between the phases. The reaction substances contact at a great relative speed in the pore, and the gas-liquid / liquid-liquid mixing is improved, but due to the short axial distance, the residence time of the gas in the bed is short, so the ozone utilization rate needs to be further improved. SUMMARY

[0007] The application provides a rotating packed bed with a novel structure, which solves the problems in the prior art that the gas entering the bed is not easy to flow in the bed, the residence time of ozone in the bed is short, the ozone utilization rate is low, and the energy consumption is high.

[0008] The technical scheme of the application is as follows: a rotating packed bed with a novel structure, comprising a shell, wherein the upper end surface of the shell is provided with a driving mechanism, the outer surface of the shell is provided with a gas inlet, and the upper and lower end surfaces of the shell are respectively provided with a gas outlet and a liquid outlet.

[0009] A tubular liquid distributor is arranged in the center of the shell, a plurality of nozzles are formed in the surface of the tubular liquid distributor, a plurality of driven mechanisms are arranged on the inner wall of the shell, one end of each driven mechanism is fixedly connected with a ring-shaped packing support frame, the tubular liquid distributor is located at the center of the ring-shaped packing support frame, a heterogeneous catalyst is arranged in the ring-shaped packing support frame, and a linkage mechanism is arranged at the center of the ring-shaped packing support frame.

[0010] The inner wall of the ring-shaped packing support frame is fixedly connected with a plurality of baffle plates.

[0011] Further, a plurality of fixing rings are welded on the surface of the shell, a plurality of support columns for supporting are fixedly connected to the surface of the fixing rings, and an anti-skid gasket is arranged at one end of each support column.

[0012] Further, the driving mechanism comprises a mounting frame fixedly connected to the upper surface of the shell, a transmission motor fixedly connected to one side of the mounting frame, a connecting port formed in the center of the upper surface of the shell, and a sealing bearing fixedly connected to the inner wall of the connecting port.

[0013] Further, the driven mechanism comprises a ring-shaped sliding rail fixedly connected to the inner surface of the shell, a sliding piece movably connected to the inside of the ring-shaped sliding rail, a lubricating grease arranged in the inside of the ring-shaped sliding rail and a plurality of connecting rods fixedly connected to one side of the sliding piece.

[0014] One end of the connecting rod is fixedly connected to the annular packing support frame, and the cross section of the sliding piece is in the shape of an I-beam.

[0015] Further, the linkage mechanism comprises an internal gear fixedly connected to one side of the annular packing support frame, a transmission shaft fixedly connected to the output end of the driving mechanism and a transmission gear fixedly connected to one end of the transmission shaft.

[0016] The transmission gear is in meshing connection with the internal gear.

[0017] Further, a plurality of openings are arranged on the upper and lower end surfaces of the annular packing support frame, and a plurality of liquid inlets are arranged on the side of the annular packing support frame close to the tubular liquid distributor.

[0018] Further, a clamping hole is arranged on the end surface of the fixing ring, a reinforcing rod is clamped on the inner wall of the clamping hole, and the reinforcing rod is made of a material with toughness.

[0019] Further, the corners of the outer surface of the shell are chamfered, the chamfered surface is adhesively connected with a rubber gasket, and the surface of the shell is sprayed with protective paint.

[0020] Further, the baffle is divided into two types of outer ring and inner ring, the size of the outer ring is the outer diameter of the annular packing support frame, the inner diameter is 1 / 3-1 / 2 of the outer diameter of the annular packing support frame, the size of the inner ring is the outer diameter of 1 / 2-2 / 3 of the outer diameter of the annular packing support frame, and the inner diameter is the inner diameter of the annular packing support frame, the number of the baffles is three, the baffles are divided into outer rings and inner rings, and the outer rings are staggered arranged, the distance between the outer rings is 1 / 4-1 / 3 of the outer diameter of the annular packing support frame, the sizes of two of the baffles are consistent, and the positions of the two baffles are inconsistent.

[0021] Further, a polytetrafluoroethylene sealing ring is arranged between the shell and the liquid outlet, and between the tubular liquid distributor and the gas outlet.

[0022] The working principle and beneficial effects of the present application are as follows:

[0023] 1. The application has reasonable structure, the centrifugal force received by the gas in the bed is smaller, so that it continues to flow in the axial direction, the application sets the baffle in the rotation direction of the axis, so that the ozone flows in the bed in the shape of "S", changes the flow mode of the gas in the rotor, improves the turbulence degree of the gas in the bed, makes the gas appear local vortex and forced turbulence near the plate layer, thereby increasing the residence time of the ozone in the bed by about 20%, improving the gas-liquid contact, further improving the ozone utilization rate, thereby achieving the purpose of reducing energy consumption, and making the organic wastewater meet the discharge standard;

[0024] 2. The application drives the transmission shaft by the transmission motor, and the transmission gear rotates in parallel, and the transmission gear meshes with the internal gear to rotate, so that the annular filler support frame slides in the annular slide rail through the connecting rod and the sliding piece, achieving the stability of the annular filler support frame rotation.

[0025] 3. The application supports and fixes the shell through the fixing ring and the support column, and protects the surface of the shell through the reinforcing rod between the two fixing rings, avoiding the problem of shell damage caused by external collision during use. DETAILED DESCRIPTION

[0026] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0027] Figure 1 The application is a three-dimensional structure diagram Figure 1 ;

[0028] Figure 2 The application is a three-dimensional structure diagram Figure 2 ;

[0029] Figure 3 The application is a cross-sectional structure diagram

[0030] Figure 4 The application is a three-dimensional structure diagram Figure 3 The application is a three-dimensional structure diagram

[0031] Figure 5 The application is a three-dimensional structure diagram Figure 3 The application is a three-dimensional structure diagram

[0032] Figure 6 The application is a three-dimensional structure diagram

[0033] In the figure: 1, shell; 2, transmission motor; 3, mounting frame; 4, fixed ring; 5, reinforcing rod; 6, support column; 7, tubular liquid distributor; 8, liquid outlet; 9, gas inlet; 10, anti-skid washer; 11, gas outlet; 12, sealing bearing; 13, annular packing support frame; 14, baffle; 15, opening; 16, liquid inlet; 17, annular slide rail; 18, sliding piece; 19, connecting rod; 20, transmission shaft; 21, inner gear; 22, transmission gear. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work, are involved in the protection scope of the present application.

[0035] Please refer to Figures 1-6 The present application provides a novel structure of rotating packed bed technical solution: including shell 1, the upper end surface of shell 1 is provided with driving mechanism, the outer surface of shell 1 is provided with gas inlet 9, the upper and lower end surfaces of shell 1 are respectively provided with gas outlet 11 and liquid outlet 8;

[0036] The center of shell 1 is provided with tubular liquid distributor 7, the surface of tubular liquid distributor 7 is provided with a plurality of nozzles, the inner wall of shell 1 is provided with a plurality of driven mechanisms, one end of the driven mechanism is fixedly connected with annular packing support frame 13, tubular liquid distributor 7 is in the center of annular packing support frame 13, the inside of annular packing support frame 13 is provided with heterogeneous catalyst, the center of annular packing support frame 13 is provided with linkage mechanism, and annular packing support frame 13 is a rotating packed bed;

[0037] The inner wall of annular packing support frame 13 is fixedly connected with a plurality of baffles 14;

[0038] In the application, oxygen passes through the ozone generator to generate ozone and oxygen mixture, which enters the annular packing support frame 13 through the pipeline and the gas inlet 9 at a gas flow of 60L / h, and 1L of pesticide salt-containing organic wastewater raw water is poured into the liquid storage tank, which enters through the tubular liquid distributor 7 at a flow rate of 60L / h by the delivery pump and the liquid flowmeter, and the liquid sprayed by the tubular liquid distributor 7 enters the annular packing support frame 13 and fully contacts with the ozone gas, and the supergravity factor is set to 30, at this time, the driving mechanism drives the linkage mechanism, so that the centrifugal force generated by the high-speed rotation of the annular packing support frame 13 replaces the gravitational acceleration to make the mixed liquid flow from the center to the outer edge in the bed, and the packing in the annular packing support frame 13 quickly shears the flowing liquid, and the gas and liquid are fully mixed and reacted in the supergravity rotating packing bed, the unreacted gas is discharged after being absorbed by 5% potassium iodide (KI) solution, and the liquid is collected and then discharged through the liquid outlet 8 to the liquid storage tank for the next cycle, and the cycle is ended after 15 minutes of reaction.

[0039] Note: After using the pesticide production wastewater with COD of 300-400mg / L at a supergravity factor of 30, a liquid flow of 60L / h, a liquid-gas ratio of 1:1, an ozone concentration of 20mg / L and a reaction time of 15min, the COD value is reduced to 130-160mg / L, and the degradation rate is more than 60%, reaching the pesticide organic wastewater discharge standard.

[0040] Preferably, the surface of the shell 1 is welded with a plurality of fixing rings 4, the surface of the fixing ring 4 is fixedly connected with a plurality of support columns 6 for supporting and fixing, one end of the support column 6 is provided with an anti-skid pad 10, the end face of the fixing ring 4 is provided with a clamping hole, and the inner wall of the clamping hole is clamped with a reinforcing rod 5, and the reinforcing rod 5 is composed of a material with toughness.

[0041] Specifically, the shell 1 is supported and fixed by the fixing ring 4 and the support column 6, and the surface of the shell 1 is protected by the reinforcing rod 5 between the two fixing rings 4.

[0042] Preferably, the driving mechanism includes a mounting bracket 3 fixedly connected to the upper surface of the shell 1, a transmission motor 2 fixedly connected to one side of the mounting bracket 3, a connecting port provided in the center of the upper surface of the shell 1, and a sealing bearing 12 fixedly connected to the inner wall of the connecting port, and the driven mechanism includes an annular slide rail 17 fixedly connected to the inner surface of the shell 1, a sliding piece 18 movably connected to the inside of the annular slide rail 17, a lubricating oil paste provided in the annular slide rail 17, and a plurality of connecting rods 19 fixedly connected to one side of the sliding piece 18.

[0043] One end of the connecting rod 19 is fixedly connected with the annular packing support frame 13, and the cross-sectional shape of the sliding piece 18 is an I-shaped section.

[0044] The linkage mechanism comprises an inner gear 21 fixedly connected to one side of the annular packing support frame 13, a transmission shaft 20 fixedly connected to an output end of the driving mechanism, and a transmission gear 22 fixedly connected to one end of the transmission shaft 20.

[0045] The transmission gear 22 is in meshing connection with the inner gear 21.

[0046] Specifically, the transmission motor 2 drives the transmission shaft 20 to rotate in linkage with the transmission gear 22, and the transmission gear 22 meshes with the inner gear 21 to rotate, so that the annular packing support frame 13 slides in the annular slide rail 17 through the connecting rod 19 and the sliding piece 18.

[0047] Preferably, the upper and lower end faces of the annular packing support frame 13 are provided with a plurality of openings 15, one side of the annular packing support frame 13 close to the tubular liquid distributor 7 is provided with a plurality of liquid inlets 16, the edges of the outer surface of the shell 1 are chamfered, the chamfered surface is adhesively connected with rubber gaskets, the surface of the shell 1 is sprayed with protective paint, and polytetrafluoroethylene sealing rings are arranged between the shell 1 and the liquid outlet 8, the tubular liquid distributor 7 and the gas outlet 11.

[0048] Preferably, the baffle 14 is divided into two types of outer ring and inner ring, the outer ring has an outer diameter equal to that of the annular packing support frame 13 and an inner diameter equal to 1 / 3-1 / 2 of the outer diameter of the annular packing support frame 13, the inner ring has an outer diameter equal to 1 / 2-2 / 3 of the outer diameter of the annular packing support frame 13 and an inner diameter equal to that of the annular packing support frame 13, the number of the baffles 14 is three, the baffles 14 are divided into outer rings and inner rings and are staggered in the form of outer rings, the distance between the outer rings is 1 / 4-1 / 3 of the outer diameter of the annular packing support frame 13, and the sizes of two of the baffles 14 are consistent but the positions are inconsistent.

[0049] The working principle and use process of the application are as follows: in use, the gas inlet 9 is connected with an oxygen cylinder, an ozone generator and a gas-phase ozone concentration detector through pipelines, the tubular liquid distributor 7 is connected with a delivery pump through a pipeline, liquid in a liquid storage tank is delivered to the tubular liquid distributor 7, the liquid outlet 8 is connected with the liquid storage tank through a pipeline, and finally the gas outlet 11 is connected with a gas recovery device through a pipeline, so that the installation work before use is completed.

[0050] Oxygen through ozone generator to produce ozone and oxygen mixture gas according to 60L / h gas through pipeline and gas inlet 9 into the annular packing support frame 13, while taking 1L pesticide salted organic wastewater raw water poured into the liquid tank, through the delivery pump and liquid flow meter to 60L / h flow from the tubular liquid distributor 7 into, through the tubular liquid distributor 7 sprayed liquid into the annular packing support frame 13 and gas contact, supergravity factor is set to 30, at this time through the transmission motor 2 drive shaft 20, and drive gear 22 parallel motion to rotate, while the transmission gear 22 meshing with the inner gear 21 to rotate, so as to make the annular packing support frame 13 through the connecting rod 19 and sliding element 18 in the annular slide rail 17 sliding, to make the annular packing support frame 13 high-speed rotation, and the centrifugal force generated instead of gravity acceleration makes the mixed liquid in the bed from the center to the edge, while the packing in the annular packing support frame 13 to the flowing liquid fast shear, in the supergravity rotating packed bed gas liquid is fully mixed reaction, unreacted gas by 5% potassium iodide (KI) solution after absorption, liquid convergence, through the liquid outlet 8 to the liquid tank after the next cycle, reaction 15min after the end of the cycle.

[0051] The above only for the preferred embodiments of the present application, and not to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A rotating packed bed of novel construction comprising a housing (1) characterised in that, The upper end surface of the shell (1) is provided with a driving mechanism, the outer surface of the shell (1) is provided with a gas inlet (9), and the upper and lower end surfaces of the shell (1) are respectively provided with a gas outlet (11) and a liquid outlet (8); The center of the shell (1) is provided with a tubular liquid distributor (7), the surface of the tubular liquid distributor (7) is provided with a plurality of nozzles, the inner wall of the shell (1) is provided with a plurality of driven mechanisms, one end of the driven mechanism is fixedly connected with a ring-shaped packing support frame (13), the tubular liquid distributor (7) is located at the center of the ring-shaped packing support frame (13), the inside of the ring-shaped packing support frame (13) is provided with a heterogeneous catalyst, and the center of the ring-shaped packing support frame (13) is provided with a linkage mechanism. The inner wall of the ring-shaped packing support frame (13) is fixedly connected with a plurality of baffle plates (14). The driving mechanism comprises a mounting frame (3) fixedly connected to the upper surface of the shell (1), a transmission motor (2) fixedly connected to one side of the mounting frame (3), a connecting port formed in the center of the upper surface of the shell (1), and a sealing bearing (12) fixedly connected to the inner wall of the connecting port. The driven mechanism comprises a ring-shaped sliding rail (17) fixedly connected to the inner surface of the shell (1), a sliding piece (18) movably connected to the inside of the ring-shaped sliding rail (17), a lubricating oil paste arranged in the inside of the ring-shaped sliding rail (17), and a plurality of connecting rods (19) fixedly connected to one side of the sliding piece (18). One end of the connecting rod (19) is fixedly connected with the ring-shaped packing support frame (13), and the cross-sectional shape of the sliding piece (18) is I-shaped. The baffle plate (14) is divided into two types of outer ring and inner ring, the outer ring size is the outer diameter of the ring-shaped packing support frame (13), the inner diameter is 1 / 3-1 / 2 of the outer diameter of the ring-shaped packing support frame (13), the inner ring size is 1 / 2-2 / 3 of the outer diameter of the ring-shaped packing support frame (13), and the inner diameter is the inner diameter of the ring-shaped packing support frame (13), the number of the baffle plate (14) is three, the baffle plate (14) is divided into outer ring, inner ring, and outer ring, and is staggered in the form of outer ring, the distance therebetween is 1 / 4-1 / 3 of the outer diameter of the ring-shaped packing support frame (13), and the sizes of two of them are consistent, and their positions are inconsistent.

2. A novel structured rotating packed bed according to claim 1, characterized in that, The surface of the shell (1) is welded with a plurality of fixing rings (4), the surface of the fixing ring (4) is fixedly connected with a plurality of support columns (6) for supporting and fixing, and one end of the support column (6) is provided with an anti-skid gasket (10).

3. A novel structured rotating packed bed according to claim 1, wherein, The linkage mechanism comprises an internal gear (21) fixedly connected to one side of the ring-shaped packing support frame (13), a transmission shaft (20) fixedly connected to the output end of the driving mechanism, and a transmission gear (22) fixedly connected to one end of the transmission shaft (20). The transmission gear (22) is in meshing connection with the internal gear (21).

4. A novel structured rotating packed bed according to claim 1, characterized in that, The upper and lower end surfaces of the ring-shaped packing support frame (13) are both provided with a plurality of openings (15), and the surface of the ring-shaped packing support frame (13) close to the tubular liquid distributor (7) is provided with a plurality of liquid inlets (16).

5. A novel structured rotating packed bed according to claim 2, wherein, The end surface of the fixed ring (4) is provided with a clamping hole, and the inner wall of the clamping hole is clamped with a reinforcing rod (5), which is made of a material with toughness.

6. A novel structured rotating packed bed according to claim 1, characterized in that, The corners of the outer surface of the shell (1) are chamfered, and rubber gaskets are bonded to the chamfered surfaces.

7. A novel structured rotating packed bed according to claim 1, wherein, The shell (1) is provided with a polytetrafluoroethylene sealing ring between the liquid outlet (8) and the tubular liquid distributor (7) and the gas outlet (11).

Images