CN216106501U

CN216106501U - Water treatment device for catalyzing ozone oxidation in homogeneous phase and heterogeneous phase

Info

Publication number: CN216106501U
Application number: CN202121459883.4U
Authority: CN
Inventors: 张瑞峰; 张犇; 周鹏龙; 乔羽; 杨世莲
Original assignee: Xian Polytechnic University
Current assignee: Xian Polytechnic University
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-03-22
Anticipated expiration: 2031-06-29

Abstract

The utility model discloses a water treatment device for homogeneous and heterogeneous concerted catalytic ozonation, which comprises a water treatment device, wherein the water treatment device is provided with a water inlet part and a water outlet part, the water inlet part is in conduction connection with an ozone generator, the water treatment device is sequentially provided with a gas distribution layer, a homogeneous catalytic reaction layer and a heterogeneous catalytic oxidation layer along the flow direction from the water inlet part to the water outlet part, the water treatment device is in conduction connection with a tail gas absorber between the gas distribution layer and the water inlet part, the water treatment device is also provided with a filter layer at a position close to the water outlet part, and the water treatment device is provided with a backwashing assembly so as to be convenient for cleaning the water treatment device. According to the utility model, through reasonable water treatment layered structure design, water treatment operation is optimized, the recovery and separation of a homogeneous catalyst are realized, the utilization rate of the catalyst and ozone is improved, the catalytic ozone oxidation efficiency is improved, and the recovery and utilization of the homogeneous catalyst and the catalytic efficiency of a heterogeneous catalytic system are improved.

Description

Water treatment device for catalyzing ozone oxidation in homogeneous phase and heterogeneous phase

Technical Field

The utility model belongs to the technical field of advanced sewage treatment and recycling, and particularly relates to a water treatment device for catalyzing ozone oxidation by homogeneous and heterogeneous synergy.

Background

With the rapid development of industrial and agricultural production and the wide use of drugs in recent years, the types of refractory organic matters in wastewater are increasing, mainly including aromatic organic matters, organic halides, organic pesticides and the like, and the content is also continuously increasing. In the face of this change, the biological treatment means of the conventional systems often have difficulty achieving the desired treatment effect. Under the advocation of environmental protection concepts such as 'zero sewage discharge', 'green water mountain is the Jinshan Yinshan' and the like, the development of efficient treatment means aiming at refractory organic matters becomes an important problem to be solved urgently for sewage treatment and resource utilization.

The catalytic ozonation technology is classified into a homogeneous catalytic ozonation technology and a heterogeneous catalytic ozonation technology according to the form of the catalyst. The homogeneous catalyst has high catalytic activity, but the catalyst is difficult to recycle, and is easy to cause secondary pollution to water; heterogeneous catalysts are easy to recycle, but the catalytic efficiency of the heterogeneous catalysts is generally lower than that of corresponding homogeneous catalytic processes due to the liquid-solid mass transfer resistance in the catalytic process. Therefore, how to fully utilize the respective characteristics of homogeneous catalysis and heterogeneous catalysis to further improve the efficiency of the existing catalytic ozonation process has important practical significance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a water treatment device for catalyzing ozone oxidation by homogeneous and heterogeneous concerted catalysis, which solves the problems of low recovery rate of a homogeneous catalyst and low catalytic efficiency of a heterogeneous catalytic system.

The technical scheme adopted by the utility model is that,

the utility model provides a water treatment facilities of homogeneous phase and heterogeneous catalysis ozone oxidation in coordination, including the water treatment ware, the water treatment ware has been seted up into water portion and has been gone out the water portion, it has ozone generator to intake partial turn-on connection, the water treatment ware has set gradually along the flow direction of intaking to a water portion of water and has distributed the gas layer, homogeneous phase catalytic reaction layer and heterogeneous catalysis oxide layer, the water treatment ware is located the gas layer and is intake turn-on connection between the part and have the tail gas absorber, the water treatment ware still is provided with the filter layer in the position that is close to the water portion of going out, the water treatment ware disposes the back flush subassembly, so that wash the water treatment ware.

The present invention is also characterized in that,

the water inlet part comprises a water inlet pipe, the water inlet pipe is provided with a water inlet valve, and the water inlet valve is positioned between the ozone generator and the water treatment device.

The water outlet part comprises a water outlet pipe, and the water outlet pipe is provided with a water outlet valve.

The backwashing component comprises a backwashing water inlet pipe and a backwashing water outlet pipe which are arranged on the water treatment device, the backwashing water inlet pipe is arranged at a position close to the water outlet part, the backwashing water inlet pipe is provided with a backwashing water inlet valve, the backwashing water outlet pipe is arranged at a position close to the gas distribution layer, and the backwashing water outlet pipe is provided with a backwashing water outlet valve.

The filter layer is a water outlet filter head arranged between the heterogeneous catalytic oxidation layer and the water outlet part.

The utility model has the beneficial effects that: according to the water treatment device for catalyzing ozone oxidation cooperatively by homogeneous phase and heterogeneous phase, the water treatment operation is optimized through reasonable water treatment layered structure design, the homogeneous catalyst is recycled and separated, the utilization rate of the catalyst and ozone is improved, and the ozone oxidation catalysis efficiency is improved; the recycling of the homogeneous catalyst and the catalytic efficiency of the heterogeneous catalytic system are improved.

Drawings

FIG. 1 is a schematic structural diagram of a water treatment device for homogeneous and heterogeneous concerted catalytic ozonation according to the present invention.

In the figure, 1, a water inlet pipe; 2. a gas distribution layer; 3. a homogeneous catalytic reaction layer; 4. a heterogeneous catalytic oxidation layer; 5. a water outlet filter head; 6. a water outlet pipe; 7. backwashing the water inlet pipe; 8. backwashing the water outlet pipe; 9. an ozone generator; 10. the system comprises a tail gas absorber, 11 water treatment devices, 12 water inlet valves, 13 backwashing water outlet valves, 14 backwashing water inlet valves and 15 water outlet valves.

Detailed Description

The following describes a water treatment device for homogeneous and heterogeneous concerted catalytic ozonation according to the present invention in further detail with reference to the accompanying drawings and embodiments.

As shown in figure 1, the water treatment device for homogeneous and heterogeneous concerted catalytic ozonation comprises a water treatment device 11, wherein a water inlet pipe 1 is arranged on the side wall of the top of the water treatment device 11, a water outlet pipe 6 is arranged at the bottom of the water inlet pipe 1, an ozone generator 9 is connected on the water inlet pipe 1 in a conduction mode, a water inlet valve 12 is arranged between the ozone generator 9 and the water treatment device 11 on the water inlet pipe 1, a water outlet valve 15 is arranged on the water outlet pipe 6, a gas distribution layer 2, a homogeneous catalytic reaction layer 3 and a heterogeneous catalytic oxidation layer 4 are sequentially arranged in the water treatment device 11 from top to bottom, a tail gas absorber 10 is connected on the top of the water treatment device 11 in a conduction mode, and a water filter layer consisting of a plurality of water outlet filter heads is further arranged at the bottommost in the water treatment device 11.

The bottom of the side wall of the water inlet pipe 1 of the water treatment device 11 is communicated with a back flush water inlet pipe 7, the back flush water inlet pipe 7 is provided with a back flush water inlet valve 14, the top of the other side wall of the water treatment device 11 is provided with a back flush water outlet pipe 8, and the back flush water outlet pipe 8 is provided with a back flush water outlet valve 13; the backwashing assembly is arranged to clean the water processor 11, thereby improving the quality and efficiency of the operation.

The bottoms of the homogeneous catalytic reaction layer 3 and the heterogeneous catalytic oxidation layer 4 of the water treatment device 11 are provided with packing layer bearing plates, the packing layer bearing plates are made of one or alloy materials of ABS (acrylonitrile butadiene styrene), PC (polycarbonate), PPO (polyphenylene oxide) and PP (polypropylene), and the mesh number of the bearing plates is 50-100 meshes; the homogeneous catalytic reaction layer 3 uses a catalyst of a transition metal ion solution type to constitute a filler. The packing layer of the heterogeneous catalytic oxidation layer 4 is a transition metal oxide using materials such as activated carbon, porous ceramsite, molecular sieve, zeolite or graphene as carriers, the type of the transition metal oxide is the same as that of a catalyst metal element selected by the homogeneous catalytic part, or a synergistic composite metal oxide can be formed, the active ingredients of the composite metal oxide are loaded on the activated carbon and the carriers, and the particle size is 3-5 mm.

The homogeneous catalytic reaction layer 3 can perform a catalytic oxidation treatment on the inlet water to form a corresponding transition metal oxide catalyst during the catalytic reaction. Along homogeneous catalysis reaction layer 3 down be heterogeneous catalysis oxidation layer 4, the ionic solution that is not oxidized in homogeneous catalysis reaction layer 3 can further exert catalytic action in heterogeneous layer, and the oxidation is held back, secondary pollution has been avoided, this layer plays the effect of reutilization ozone degradation pollutant on the one hand, the oxide that another party homogeneous catalysis region formed will be separated on this layer, and partial load is on original catalyst surface, through the layered design of twice water treatment, the separation problem of homogeneous catalyst with the processing water body has been solved, the catalytic ability of device has further been strengthened.

The gas distribution layer 2 is made of titanium alloy material and titanium aeration disks ensure the corrosion resistance of the equipment and the ozone aeration efficiency, and the aperture of each titanium aeration disk is 2-5 mu m. The upper part of the water treatment device 11 is connected with a tail gas absorber 10 in a conduction manner and used for discharging residual ozone.

The working process of the water treatment device for catalyzing ozone oxidation by homogeneous phase and heterogeneous phase cooperation comprises the following steps: the wastewater to be treated is firstly subjected to biological pretreatment to remove pollutants which are easy to treat in the wastewater, the pretreated wastewater flows into the device, meanwhile, ozone generated by the ozone generator 9 is filled into the water inlet pipe 1 through an ozone pipeline on the ozone pipeline to be mixed with the wastewater to enter the water treatment device 11, the ozone is fully contacted with the wastewater to be treated on the upper part of the gas distribution layer 2, a homogeneous phase ion catalyst is added into the water treatment device 11, the homogeneous phase catalytic reaction layer 3 on the upper part of the water treatment device 11 is used for carrying out primary catalytic oxidation on the inlet water, and then the effect of degrading the pollutants by secondarily utilizing the ozone is achieved through the heterogeneous phase catalytic oxidation layer 4; the wastewater and the ozone pass through the homogeneous catalytic reaction layer 3 in the device, and after the ozone homogeneous catalytic oxidation water stays for 10-30 minutes, a plurality of hydroxyl free radicals with strong oxidation capability and no selectivity are generated, and active components of the hydroxyl free radicals are continuously applied to the heterogeneous catalytic oxidation layer 4, so that the ozone utilization rate and the catalyst utilization rate are improved, and harmful substances and organic substances which are difficult to degrade in the wastewater are oxidized and decomposed. Residual ozone tail gas after the ozone heterogeneous catalytic oxidation hydraulic power stays for 10-30 minutes flows out of the top to a tail gas absorber 10, the indexes of the wastewater are analyzed at intervals, and after the wastewater treatment reaches the required indexes, the wastewater flows out of a water outlet pipe 6 through a filter layer consisting of a plurality of water outlet filter heads 5.

According to the water treatment device for the homogeneous and heterogeneous concerted catalytic ozonation, the recovery and separation of the homogeneous catalyst are effectively realized through the multi-stage layered water treatment device, the service cycle of the heterogeneous catalyst for water treatment on the water treatment device is prolonged, the utilization rate of the catalyst and ozone is further improved, the catalytic ozonation efficiency is improved, the quality of the operation is optimized, and the water treatment device has good practicability.

Claims

1. The utility model provides a water treatment facilities of homogeneous phase and heterogeneous concerted catalysis ozone oxidation, its characterized in that includes water treatment ware (11), water inlet part and play water part have been seted up to water treatment ware (11), it has ozone generator (9) to advance water partial turn-on connection, air distribution layer (2), homogeneous phase catalytic reaction layer (3) and heterogeneous catalytic oxidation layer (4) have been set gradually in water treatment ware (11) along the flow direction of water inlet part to play water part, water treatment ware (11) are lieing in air distribution layer (2) and advance water between the part turn-on connection have tail gas absorber (10), water treatment ware (11) still are provided with the filter layer in the position that is close to play water part, water treatment ware (11) dispose the back flush subassembly to it washs to be right water treatment ware (11).

2. The water treatment device for homogeneous and heterogeneous concerted catalytic ozonation according to claim 1, wherein the water inlet portion comprises a water inlet pipe (1), the water inlet pipe (1) is provided with a water inlet valve (12), and the water inlet valve (12) is positioned between the ozone generator (9) and the water treatment device (11).

3. A water treatment device for homogeneous and heterogeneous concerted catalytic ozonation according to claim 1, wherein the water outlet part comprises a water outlet pipe (6), and the water outlet pipe (6) is provided with a water outlet valve (15).

4. The water treatment device for homogeneous and heterogeneous concerted catalytic ozonation according to claim 1, wherein the backwashing assembly comprises a backwashing water inlet pipe (7) and a backwashing water outlet pipe (8) which are opened on the water treatment device (11), the backwashing water inlet pipe (7) is arranged at a position close to a water outlet part, the backwashing water inlet pipe (7) is provided with a backwashing water inlet valve (14), the backwashing water outlet pipe (8) is arranged at a position close to the gas distribution layer (2), and the backwashing water outlet pipe (8) is provided with a backwashing water outlet valve (13).

5. The water treatment device for homogeneous and heterogeneous concerted catalytic ozonation according to claim 1, wherein the filtering layer is a plurality of water outlet filter heads (5) arranged between the heterogeneous catalytic oxidation layer (4) and the water outlet portion.