Advanced treatment device for wastewater through catalytic ozonation

Abstract

The utility model discloses an ozone catalytic oxidation wastewater advanced treatment device which comprises a reaction tower body, and an ozone diffuser, a water distribution mechanism, a backwashing gas distribution mechanism, a silk screen, a pebble supporting layer mounted on the silk screen and a catalyst packing layer placed on the pebble supporting layer are sequentially arranged in the reaction tower body from bottom to top. A tail gas destructor is arranged at the top of the reaction tower body. According to the catalytic ozonation wastewater advanced treatment device, ozone and water can be mixed at the inlet of the reaction tower, and the ozone is secondarily diffused in the reaction tower, so that the ozone enters a catalyst filler layer from the bottom of the reaction tower to react with a catalyst, the ozone utilization efficiency is improved, and the problem of catalyst loss can be reduced; and undissolved ozone gas can be collected through the tail gas destructor, so that secondary pollution is avoided, and the device is convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely is a kind of ozone catalytic oxidation wastewater advanced treatment device. BACKGROUND

[0002] With the increase of production enterprises production, wastewater discharge and pollutant concentration gradually improve, water quality in industrial wastewater is complex, there is refractory organic matter, conventional process cannot effectively remove pollutants, it greatly limits to reach standard discharge and comprehensive recycling of industrial wastewater, can utilize the powerful oxidation capacity of ozone catalytic oxidation technology, can efficiently degrade water pollutants while disinfecting wastewater, guarantee wastewater discharge, provide reliable water source for industrial wastewater recycling, applicable to industrial wastewater advanced treatment.

[0003] Ozone catalytic oxidation has the advantages of simple operation, strong applicability and no secondary pollution, utilizes ozone and catalyst reaction to produce strong oxidizing OH to remove pollutants, improves wastewater treatment system drainage index stability.

[0004] At present, the existing ozone catalytic oxidation tower has problems such as low ozone utilization rate, serious packing and loss, which causes low pollutant removal rate, and the application of ozone catalytic oxidation technology is limited, therefore, the utility model provides a kind of ozone catalytic oxidation wastewater advanced treatment device to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem to overcome the defects of the prior art, provides a kind of ozone catalytic oxidation wastewater advanced treatment device, can mix ozone with water at the inlet of reaction tower, and ozone is diffused in the reaction tower, so that ozone enters the catalyst packing layer from the bottom of the reaction tower and reacts with the catalyst, improves the utilization efficiency of ozone, also can reduce the problem of catalyst loss, and can collect undissolved ozone gas by tail gas destroyer, without secondary pollution, convenient to use, can effectively solve the problems in the background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of ozone catalytic oxidation wastewater advanced treatment device, including reaction tower body, the inside of the reaction tower body is sequentially provided with ozone diffuser, water distribution mechanism, backwashing air distribution mechanism, wire mesh, pebble support layer installed on wire mesh and catalyst packing layer placed on pebble support layer from bottom to top, the top of the reaction tower body is equipped with tail gas destroyer.

[0007] The water inlet of the water distribution mechanism is connected with water inlet pipe and backwashing water inlet pipe by adopting tee way, and water inlet valve is arranged on the water inlet pipe, and backwashing water inlet valve is arranged on the backwashing water inlet pipe.

[0008] The side of the reaction tower body is provided with a water outlet pipe and a backwashing drainage pipe, the highest height of the backwashing drainage pipe is lower than the lowest height of the water outlet pipe, and the top of the reaction tower body is provided with a breathing valve and a top manhole.

[0009] As a preferred technical scheme of the utility model, the ozone diffuser comprises a diffusion main pipe installed at the lower end inside the reaction tower body, one end of the diffusion main pipe is provided with a water gas inlet, and a secondary diffusion nozzle is arranged on the diffusion main pipe.

[0010] As a preferred technical scheme of the utility model, the backwashing gas distribution mechanism comprises a backwashing gas inlet main pipe horizontally arranged at the lower end inside the reaction tower body, the backwashing gas inlet main pipe is located on the upside of the diffusion main pipe, backwashing gas inlet branch pipes are symmetrically arranged on the two sides of the backwashing gas inlet main pipe, perforated aeration pipes are arranged on the backwashing gas inlet branch pipes, and a backwashing gas inlet is arranged at one end of the backwashing gas inlet main pipe.

[0011] As a preferred technical scheme of the utility model, the inner side of the reaction tower body corresponding to the water outlet pipe is provided with a water outlet pipe intercepting net, the inner side of the reaction tower body corresponding to the backwashing drainage pipe is provided with a backwashing drainage pipe intercepting net, and a backwashing drainage valve is arranged on the backwashing drainage pipe.

[0012] As a preferred technical scheme of the utility model, the water gas inlet of the diffusion main pipe is connected with a jet device through a pipeline, and an ozone gas inlet valve is arranged on the gas inlet of the jet device.

[0013] As a preferred technical scheme of the utility model, a jet pump is connected to the outlet of the drainage pipeline at the lower end of the reaction tower body, a vent valve and a jet pump water inlet valve are further arranged on the drainage pipeline, the water outlet pipe of the jet pump is connected to the water inlet of the jet device, and a jet pump water outlet valve is arranged on the water outlet pipe of the jet pump.

[0014] As a preferred technical scheme of the utility model, the side of the reaction tower body corresponding to the upper surface of the catalyst filling layer is provided with an upper manhole.

[0015] As a preferred technical scheme of the utility model, a backwashing water inlet valve is arranged on the backwashing gas inlet of the backwashing gas inlet main pipe.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The ozone catalytic oxidation wastewater advanced treatment device can mix ozone and water at the inlet of the reaction tower, and the ozone is subjected to secondary diffusion inside the reaction tower, so that the ozone enters the catalyst filling layer from the bottom of the reaction tower and reacts with the catalyst, the utilization efficiency of the ozone is improved, the catalyst loss problem is reduced, the undissolved ozone gas can be collected through the tail gas destroyer, no secondary pollution is caused, and the ozone catalytic oxidation wastewater advanced treatment device is convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the structural schematic view of the utility model;

[0019] Fig. 2 It is the structural schematic view of the backwash cloth gas mechanism in the utility model;

[0020] Fig. 3 It is the structural schematic view of the ozone diffuser in the utility model.

[0021] In the drawing: 1 reaction tower body, 2 water inlet pipe, 3 backwash water inlet pipe, 4 water outlet pipe, 5 backwash drainage pipe, 6 water distribution mechanism, 7 backwash cloth gas mechanism, 71 backwash air inlet, 72 backwash air inlet main pipe, 73 backwash air inlet branch pipe, 74 perforated aeration pipe, 8 wire mesh, 9 pebble support layer, 10 catalyst packing layer, 11 ozone diffuser, 111 water gas inlet, 112 diffusion main pipe, 113 secondary diffusion nozzle, 12 tail gas destroyer, 13 breather valve, 14 water outlet pipe intercepting screen, 15 backwash drainage pipe intercepting screen, 16 vent valve, 17 jet pump, 18 ozone air inlet valve, 19 jet device, 20 upper access hole, 21 top access hole, 22 water inlet valve, 23 backwash water inlet valve, 24 jet pump water inlet valve, 25 jet pump water outlet valve, 26 backwash drainage valve, 27 backwash air inlet valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Please refer to Figs. 1-3 The utility model provides a technical scheme: a kind of ozone catalytic oxidation wastewater advanced treatment device, including reaction tower body 1, the inside of reaction tower body 1 is sequentially provided with ozone diffuser 11 from below to above, water distribution mechanism 6, backwash cloth gas mechanism 7, wire mesh 8, pebble support layer 9 installed on wire mesh 8 and catalyst packing layer 10 placed on pebble support layer 9, the top of reaction tower body 1 is equipped with tail gas destroyer 12, tail gas destroyer 12 in the top of reaction tower body 1 will not be dissolved ozone gas through tail gas destroyer 12 collection, using thermal catalytic device, ozone is decomposed into oxygen, avoid producing secondary pollution.

[0024] The particle size of pebble on pebble support layer 9 decreases layer by layer from bottom to top.

[0025] The water inlet of the water distribution mechanism 6 is connected with the water inlet pipe 2 and the backwashing water inlet pipe 3 in a three-way mode, and the water inlet pipe 2 is provided with a water inlet valve 22, and the backwashing water inlet pipe 3 is provided with a backwashing water inlet valve 23. After the air washing is completed, the backwashing water inlet valve 23 on the backwashing water inlet pipe 3 is opened, water in the backwashing water inlet pipe 3 further washes the surface of the catalyst filler, the catalyst filler surface is cleaned by the combined action of backwashing water and backwashing gas, and the reaction tower body 1 is discharged through the backwashing drain pipe 5, so as to avoid the influence of the hardening or surface dirt of the catalyst filler layer 10 on the efficiency, and the reaction tower body 1 can be used again after sufficient backwashing.

[0026] The side of the reaction tower body 1 is provided with the water outlet pipe 4 and the backwashing drain pipe 5, and the highest height of the backwashing drain pipe 5 is lower than the lowest height of the water outlet pipe 4. The top of the reaction tower body 1 is provided with a breathing valve 13 and a top access hole 21. The breathing valve 13 arranged at the top of the reaction tower body 1 ensures the air pressure balance in the reaction tower body 1. The reaction tower body 1 is provided with the upper access hole 20 and the top access hole 21 for maintenance operation.

[0027] Further, the ozone diffuser 11 includes a diffusion main pipe 112 installed at the lower end inside the reaction tower body 1. One end of the diffusion main pipe 112 is provided with a water-gas inlet 111, and the diffusion main pipe 112 is provided with a secondary diffusion nozzle 113. The mixed water-gas mixture enters the ozone diffuser 11, and then enters the reaction tower body 1 through the secondary diffusion nozzle 113 arranged in the ozone diffuser 11, so as to further improve the mixing effect of ozone and water and increase the reaction area of ozone and catalyst.

[0028] Further, the backwashing air distribution mechanism 7 includes a backwashing air inlet main pipe 72 horizontally arranged at the lower end inside the reaction tower body 1, and the backwashing air inlet main pipe 72 is located on the upper side of the diffusion main pipe 112. The backwashing air inlet main pipe 72 is symmetrically provided with backwashing air inlet branch pipes 73 on both sides, and the backwashing air inlet branch pipes 73 are provided with perforated aeration pipes 74. One end of the backwashing air inlet main pipe 72 is provided with a backwashing air inlet 71. During the air washing operation, the water inlet valve 22 is closed, and the backwashing drain valve 26 and the backwashing air inlet valve 27 are opened. The backwashing air distribution mechanism 7 enters the backwashing air inlet main pipe 72 through the backwashing air inlet 71. The gas in the backwashing air inlet main pipe 72 is uniformly distributed to the backwashing air inlet branch pipes 73. The gas is sprayed upward through the perforated aeration pipes 74 in the backwashing air inlet branch pipes 73 to wash the catalyst filler layer 10, so that the catalyst filler layer 10 is expanded, loosened and collided with each other to remove the pollutants attached to the upper part of the catalyst filler layer 10.

[0029] Further, the inner side surface of the reaction tower body 1 corresponding to the water outlet pipe 4 is provided with a water outlet pipe intercepting net 14, and the wastewater after reacting with the catalyst filler layer 10 is intercepted by the intercepting net 14 and then enters the next processing procedure through the water outlet pipe 4; and the inner side surface of the reaction tower body 1 corresponding to the backwashing drainage pipe 5 is provided with a backwashing drainage pipe intercepting net 15, and the backwashing drainage pipe 5 is provided with a backwashing drainage valve 26.

[0030] Further, the water and gas inlet 111 of the diffusion main pipe 112 is connected with a jet device 19 through a pipeline, and the gas inlet of the jet device 19 is provided with an ozone gas inlet valve 18; the water and ozone can be quickly and uniformly mixed through the jet device 19; the mixed water and gas mixture enters the ozone diffuser 11, and further improves the mixing effect of ozone and water and the reaction area of ozone and catalyst through the secondary diffusion nozzle 113 arranged in the ozone diffuser 11.

[0031] Further, the outlet of the drainage pipeline at the lower end of the reaction tower body 1 is connected with a jet pump 17, and the drainage pipeline is further provided with a vent valve 16 and a jet pump water inlet valve 24; the vent valve 16 is arranged at the bottom of the reaction tower, and the water can be vented when the reaction tower body 1 is abnormal; the outlet of the jet pump 17 is connected with the water inlet of the jet device 19, and the outlet of the jet pump 17 is provided with a jet pump water outlet valve 25; the water at the bottom of the reaction tower body 1 is pumped into the jet device 19 through the jet pump 17, and then enters the ozone diffuser 11 after being mixed with the ozone gas inlet valve 18; the water at the bottom is extracted and transported by the jet pump 17 to complete the circulation.

[0032] Further, the side surface of the reaction tower body 1 corresponding to the upper surface of the catalyst filler layer 10 is provided with an upper maintenance opening 20.

[0033] Further, the backwashing water inlet 71 of the backwashing water inlet main pipe 72 is provided with a backwashing water inlet valve 27.

[0034] In use:

[0035] The water at the bottom of the reaction tower body 1 is pumped into the jet device 19 through the jet pump 17, and then enters the ozone diffuser 11 after being mixed with the ozone gas inlet valve 18; the water at the bottom is extracted and transported by the jet pump 17 to complete the circulation.

[0036] The ozone diffuser 11 is used for secondary diffusion at the bottom of the reaction tower.

[0037] The wastewater enters the lower part of the reaction tower body 1 through the water inlet pipe 2 and the water inlet valve 22, and then flows through the catalyst filler layer 10 from bottom to top after being uniformly distributed by the water distribution mechanism 6; the water inlet is in full contact with the ozone and the catalyst filler layer 10 for reaction, and OH - The refractory organic matter in the wastewater is fully oxidized and reacted, and the water quality is purified and then enters the next procedure through the water outlet intercepting net 14 and the water outlet pipe 4.

[0038] The tail gas breaker 12 at the top of the reaction tower body 1 collects the undissolved ozone gas, and the ozone is decomposed into oxygen by using a thermal catalytic device, so that secondary pollution is avoided.

[0039] When the backwashing is performed, the water inlet valve 22 is closed, the backwashing water outlet valve 26 and the backwashing air inlet valve 27 are opened, the backwashing fan is started, and the air scrubbing operation is performed on the catalyst filler 10 by the backwashing air distribution mechanism 7, so that the pollutants attached to the surface of the catalyst filler are washed off;

[0040] After the air washing is completed, the backwashing water inlet valve 23 on the backwashing water inlet pipe 3 is opened, water is fed into the backwashing water inlet pipe 3 to further wash the surface of the catalyst filler, the pollutants on the surface of the catalyst filler are removed by the combined action of the backwashing water and the backwashing air, and the reaction tower body 1 is discharged through the backwashing water outlet pipe 5, so that the catalyst filler layer 10 is prevented from being hardened or the surface of the catalyst filler layer 10 is prevented from being too dirty to affect the efficiency, and after sufficient backwashing, the reaction tower body 1 can be used again.

[0041] When the device is abnormal, the reaction tower body 1 can be emptied through the vent valve 16, the upper access opening 20 and the top access opening 21 are used to enter the reaction tower body 1 to perform the maintenance operation.

[0042] The ozone and water can be mixed at the inlet of the reaction tower, the ozone can be secondarily diffused in the reaction tower, the ozone can enter the catalyst filler layer from the bottom of the reaction tower to react with the catalyst, the utilization efficiency of the ozone is improved, the catalyst loss problem can be reduced, the undissolved ozone gas can be collected through the tail gas breaker 12, no secondary pollution is generated, and the device is convenient to use.

[0043] The non-disclosed parts in the utility model are prior art, and the specific structure, material and working principle are not described in detail. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A kind of ozone catalytic oxidation wastewater advanced treatment device, including reaction tower tower body (1), it is characterized by: The inside of the reaction tower body (1) is sequentially provided from bottom to top with an ozone diffuser (11), a water distribution mechanism (6), a backwashing air distribution mechanism (7), a wire mesh (8), a pebble supporting layer (9) mounted on the wire mesh (8), and a catalyst filling layer (10) placed on the pebble supporting layer (9), and the top of the reaction tower body (1) is provided with a tail gas destroyer (12); The water inlet of the water distribution mechanism (6) is connected with a water inlet pipe (2) and a backwashing water inlet pipe (3) in a tee joint manner, the water inlet pipe (2) is provided with a water inlet valve (22), and the backwashing water inlet pipe (3) is provided with a backwashing water inlet valve (23). The side of the reaction tower body (1) is provided with a water outlet pipe (4) and a backwashing drainage pipe (5), the highest height of the backwashing drainage pipe (5) is lower than the lowest height of the water outlet pipe (4), the top of the reaction tower body (1) is provided with a breather valve (13) and a top access hole (21).

2. The ozone catalytic oxidation wastewater advanced treatment device according to claim 1, characterized in that: The ozone diffuser (11) comprises a diffusion main pipe (112) mounted at the lower end inside the reaction tower body (1), one end of the diffusion main pipe (112) is provided with a water-air inlet (111), and the diffusion main pipe (112) is provided with a secondary diffusion nozzle (113).

3. The ozone catalytic oxidation wastewater advanced treatment device according to claim 2, characterized in that: The backwashing air distribution mechanism (7) comprises a backwashing air inlet main pipe (72) horizontally arranged at the lower end inside the reaction tower body (1), the backwashing air inlet main pipe (72) is located on the upper side of the diffusion main pipe (112), backwashing air inlet branch pipes (73) are symmetrically arranged on the two sides of the backwashing air inlet main pipe (72), perforated aeration pipes (74) are arranged on the backwashing air inlet branch pipes (73), and one end of the backwashing air inlet main pipe (72) is provided with a backwashing air inlet (71).

4. The ozone catalytic oxidation wastewater advanced treatment device according to claim 1, characterized in that: The inside of the reaction tower body (1) is sequentially provided from bottom to top with an ozone diffuser (11), a water distribution mechanism (6), a backwashing air distribution mechanism (7), a wire mesh (8), a pebble supporting layer (9) mounted on the wire mesh (8), and a catalyst filling layer (10) placed on the pebble supporting layer (9), and the top of the reaction tower body (1) is provided with a tail gas destroyer (12); 5. The ozone catalytic oxidation wastewater advanced treatment device according to claim 2, characterized in that: The water-air inlet (111) of the diffusion main pipe (112) is connected with a jet device (19) through a pipeline, and the air inlet of the jet device (19) is provided with an ozone air inlet valve (18).

6. The ozone catalytic oxidation wastewater advanced treatment device according to claim 1, characterized in that: The outlet of the drainage pipeline at the lower end of the reaction tower body (1) is connected with a jet pump (17), the drainage pipeline is further provided with a vent valve (16) and a jet pump water inlet valve (24), the water outlet pipe of the jet pump (17) is connected with the water inlet of the jet device (19), and the water outlet pipe of the jet pump (17) is provided with a jet pump water outlet valve (25).

7. The ozone catalytic oxidation wastewater advanced treatment device according to claim 1, characterized in that: The side of the reaction tower body (1) corresponding to the upper surface of the catalyst filling layer (10) is provided with an upper access hole (20).

8. The ozone catalytic oxidation wastewater advanced treatment device according to claim 3, characterized in that: The backwashing air inlet (71) of the backwashing air inlet main pipe (72) is provided with a backwashing air inlet valve (27).

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