CN219297261U - High-efficient ozone catalytic oxidation effluent treatment plant - Google Patents

Abstract

The utility model relates to the technical field of wastewater treatment, and provides a high-efficiency ozone catalytic oxidation wastewater treatment device which comprises a catalytic oxidation reaction system, an ozone primary mixing system, an ozone secondary mixing system and a back flushing system, wherein the catalytic oxidation reaction system comprises a reactor, a catalyst filler layer and a water and gas distribution device, the ozone primary mixing system comprises an ozone generator, a jet device and a reflux pump for pumping reflux liquid into the jet device, the ozone secondary mixing system comprises a water inlet pipe, a pipeline mixer and a lifting pump, one end of the pipeline mixer is connected with the water outlet end of the jet device, wastewater to be treated is fully and uniformly mixed with gas and liquid, and the back flushing system comprises a back flushing water pump and a back flushing fan and is used for cleaning pollutants attached to the catalyst filler. The method adopted by the utility model ensures that ozone and wastewater are mixed for multiple times so as to achieve higher solubility, has better mass transfer effect, and has the advantages of high ozone utilization rate, high removal efficiency, stable operation and the like.

Description

High-efficient ozone catalytic oxidation effluent treatment plant

Technical Field

The utility model relates to the field of wastewater treatment, in particular to a high-efficiency ozone catalytic oxidation wastewater treatment device.

Background

With the continuous development of industry, the problem of industrial drainage is increasingly serious, and the discharged industrial wastewater is high in hazard and brings serious pollution to the surrounding environment. The industrial wastewater has the characteristics of high pollutant concentration, complex components, difficult degradation, high biotoxicity and the like. With the continuous deep penetration of pollution control and attack, the advanced treatment process represented by advanced oxidation technology process is developed because the standard improvement and improvement of wastewater treatment are gradually advanced and the stable standard of effluent is difficult to ensure by adopting conventional biochemical treatment. The advanced oxidation technology has strong oxidizing property on organic pollutants, high reaction rate and suitability for most wastewater treatment, and can be classified into an electrochemical oxidation method, a photocatalytic oxidation method, a Fenton oxidation method, an ozone catalytic oxidation method and the like according to different production modes of strong oxidizing substances.

The ozone catalytic oxidation has the characteristics of rapid reaction, stable operation, no secondary pollution basically and the like, is a green and clean advanced oxidation technology, and is widely focused and applied in the field of treatment of refractory wastewater.

The existing ozone catalytic oxidation has the problems of poor mineralization effect of wastewater, low ozone utilization rate, high concentration of discharged ozone and the like. The utility model adopts the reflux pump and the ejector to fully mix the ozone and the wastewater in the pipeline mixer, ensures uniform water and gas distribution of the pipeline, and fully mixes the ozone, the wastewater and the catalyst filler so as to improve the ozone mass transfer efficiency. In addition, the ozone tail gas generated in the reaction process of the device is returned to the ejector, so that the ozone utilization rate is improved.

Disclosure of Invention

Based on the problems existing in the prior art, the utility model aims to provide the high-efficiency ozone catalytic oxidation wastewater treatment device, which has the advantages of fully mixing ozone with wastewater, high ozone utilization rate, long service life of catalyst filler, high removal efficiency, stable operation and capability of greatly improving the ozone oxidation efficiency.

The aim of the utility model is realized by the following technical scheme:

a high-efficiency ozone catalytic oxidation wastewater treatment device comprises a catalytic oxidation reaction system, an ozone primary mixing system, an ozone secondary mixing system and a back flushing system;

the catalytic oxidation system comprises a reactor, wherein the reactor is respectively provided with a water and gas distribution area, a catalyst packing layer and a water outlet tank from bottom to top;

the primary ozone mixing system comprises an ozone generator and an ejector, wherein the water inlet end of the ejector is connected with the reactor through a return pipe, and the air inlet of the ejector is connected with the ozone generator through an ozone inlet pipe so as to primarily mix ozone with wastewater;

the ozone secondary mixing system comprises a water inlet pipe, a lifting pump and a pipeline mixer, waste water to be treated enters the pipeline mixer through the lifting pump, and one end of the pipeline mixer is connected with the water outlet end of the ejector, so that the waste water to be treated is mixed with the gas-water mixed liquid again.

Further, the water and gas distribution area is provided with a water and gas distribution device, the water and gas distribution device is communicated with the outlet end of the pipeline mixer, one side of the water outlet tank is communicated with the water outlet pipe, and the other side of the water outlet tank is communicated with the return pipe.

Further, the back flushing system comprises a back flushing water pump, a back flushing fan and a bottom blow-down pipe.

Further, the top of the reactor is connected with an ozone tail gas discharge port, the ozone tail gas discharge port is communicated with the ozone air inlet pipe, and the ozone tail gas finally flows into the ejector and is mixed with the reflux liquid.

Further, the ozone tail gas exhaust port is also communicated with an ozone tail gas destructor.

Further, a safety valve is further arranged at the top of the reactor, and a reflux pump is further arranged on the reflux pipe.

The beneficial technical effects of the utility model are as follows:

according to the utility model, the ejector and the pipeline mixer are adopted to mix ozone and wastewater twice, and the water and gas distribution device in the bottom of the device can uniformly mix ozone, wastewater and catalyst filler again, so that the reaction efficiency of ozone catalytic oxidation is effectively improved.

The utility model is designed with the backwash water pump, the backwash fan and the bottom blow-down pipe, wherein the backwash water pump and the backwash fan can clean impurities and pollutants adhered in the catalyst filler, ensure the surface cleaning of the catalyst filler layer, realize the regeneration of the ozone catalyst and prolong the service life of the catalyst; the bottom drain pipe can discharge larger and coarser impurities at the bottom of the reactor, so that the problem of incomplete cleaning caused by flushing the impurities at the bottom to the upper filler can be effectively solved, and the catalyst can be flushed more cleanly.

The design of the utility model can return redundant ozone to the ejector, thereby improving the ozone utilization rate.

Drawings

The utility model is further described with reference to the following description of the drawings.

FIG. 1 is a schematic diagram of a high-efficiency ozone catalytic oxidation wastewater treatment device.

In the figure, 1, a catalytic oxidation reaction system; 11. a reactor; 111. the water and gas distribution area; 111a, a water and gas distribution device; 112. a catalyst packing layer; 113. a water outlet tank; 113a, a water outlet pipe; 114. an ozone tail gas discharge port; 114a, an ozone tail gas destructor; 115. a safety valve; 2. an ozone primary mixing system; 21. an ozone generator; 211. an ozone inlet pipe; 22. a jet device; 23. a return pipe; 231. a reflux pump; 3. an ozone secondary mixing system; 31. a water inlet pipe; 32. a lift pump; 33. a pipe mixer; 4. a back flushing system; 41. backwashing the water pump; 42. backwashing the fan; 43. a bottom drain pipe.

Detailed Description

An efficient ozone catalytic oxidation wastewater treatment device, referring to FIG. 1, comprises a catalytic oxidation reaction system, an ozone primary mixing system, an ozone secondary mixing system and a back flushing system;

the catalytic oxidation system 1 comprises a reactor 11, wherein the reactor 11 is respectively provided with a water and gas distribution area 111, a catalyst packing layer 112 and a water outlet tank 113 from bottom to top; the primary ozone mixing system 2 comprises an ozone generator 21 and an ejector 22, wherein one water inlet end of the ejector 22 is connected with the reactor 11 through a return pipe 23, and an air inlet of the ejector 22 is connected with the ozone generator 21 through an ozone inlet pipe 211 so as to primarily mix ozone with wastewater; the ozone secondary mixing system 3 comprises a water inlet pipe 31, a lifting pump 32 and a pipeline mixer 33, waste water to be treated enters the pipeline mixer 33 through the lifting pump 7, and one end of the pipeline mixer 33 is connected with the water outlet end of the ejector 22, so that the waste water to be treated is mixed with gas and liquid again.

The water and gas distribution area 111 is provided with a water and gas distribution device 111a, the water and gas distribution device 111a is communicated with the outlet end of the pipeline mixer 33, one side of the water outlet tank 113 is communicated with the water outlet pipe 113a, and the other side is communicated with the return pipe 23.

Wherein the back flushing system 4 comprises a back flushing water pump 41, a back flushing fan 42 and a bottom drain pipe 43.

The top of the reactor 11 is provided with an ozone exhaust outlet 114, the ozone exhaust outlet 114 is communicated with the ozone inlet pipe 211, and the ozone exhaust finally enters the ejector 22 and is mixed with the reflux liquid.

The ozone tail gas discharging port 114 is further communicated with an ozone tail gas destructor 114a, a safety valve 115 is further arranged at the top of the reactor 11, and a reflux pump 231 is further arranged on the reflux pipe 23.

The working process comprises the following steps: before use, wastewater enters the reactor 11 from the water inlet pipeline 31 through the lift pump 32 until the wastewater is full, reflux liquid discharged from the reactor 11 and ozone gas are primarily mixed through the ejector 22, and then the wastewater to be treated and ozone entrained in the reflux liquid are contacted and mixed again in the pipeline mixer 33. The ozone and wastewater mixed liquid passes through the water and gas distribution device 111a to enable the wastewater to uniformly rise in the catalyst filler layer 112, the gas and the liquid are mixed again, a large amount of hydroxyl free radicals are generated by excitation of an ozone catalyst, and organic matters in the water are efficiently oxidized, so that the water quality is purified. And meanwhile, unreacted residual ozone flows back to the ejector 22 to be mixed with the reflux liquid, so that the ozone utilization rate is improved. The back flushing system 4 can be opened periodically to perform gas-water back flushing on the catalyst packing layer 112, so that the catalyst activity is recovered and the service life of the catalyst is prolonged.

The above embodiments are only preferred modes of the present utility model, and do not limit the scope of the present utility model, and those skilled in the art can obtain other embodiments without inventiveness according to the present embodiment, and these embodiments are all included in the scope of the present utility model.

Claims (6)

1. The high-efficiency ozone catalytic oxidation wastewater treatment device is characterized by comprising a catalytic oxidation reaction system (1), an ozone primary mixing system (2), an ozone secondary mixing system (3) and a back flushing system (4);

the catalytic oxidation reaction system (1) comprises a reactor (11), wherein the reactor (11) is respectively provided with a water and gas distribution area (111), a catalyst packing layer (112) and a water outlet tank (113) from bottom to top;

the primary ozone mixing system (2) comprises an ozone generator (21) and an ejector (22), wherein the water inlet end of the ejector (22) is connected with the reactor (11) through a return pipe (23), and the air inlet of the ejector (22) is connected with the ozone generator (21) through an ozone inlet pipe (211);

the ozone secondary mixing system (3) comprises a water inlet pipe (31), a lifting pump (32) and a pipeline mixer (33), and one end of the pipeline mixer (33) is connected with the water outlet end of the ejector (22).

2. The efficient ozone catalytic oxidation wastewater treatment device according to claim 1, wherein:

the water and gas distribution area (111) is provided with a water and gas distribution device (111 a), the water and gas distribution device (111 a) is communicated with the outlet end of the pipeline mixer (33), one side of the water outlet tank (113) is communicated with the water outlet pipe (113 a), and the other side of the water outlet tank is communicated with the return pipe (23).

3. The efficient ozone catalytic oxidation wastewater treatment device according to claim 1, wherein:

the back flushing system (4) comprises a back flushing water pump (41), a back flushing fan (42) and a bottom sewage draining pipe (43).

4. The efficient ozone catalytic oxidation wastewater treatment device according to claim 1, wherein:

the top of the reactor (11) is provided with an ozone tail gas discharge port (114), the ozone tail gas discharge port (114) is communicated with the ozone inlet pipe (211), and finally the ozone tail gas is converged into the ejector (22) and mixed with the reflux liquid.

5. The efficient ozone catalytic oxidation wastewater treatment device according to claim 4, wherein:

the ozone tail gas discharging port (114) is also communicated with an ozone tail gas destructor (114 a).

6. The efficient ozone catalytic oxidation wastewater treatment device according to claim 1, wherein:

the top of the reactor (11) is also provided with a safety valve (115), and the reflux pipe (23) is also provided with a reflux pump (231).

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