CN101402024A - Ozone supply apparatus - Google Patents

Abstract

The present invention relates to an ozone supply device. The invention aims to solve the problems of low ozone utilization rate, large oxygen consumption and tail gas pollution in the prior art. The outlet of the oxygen supply device 3 communicates with the input end of the control valve through the pipeline, the output end of the control valve communicates with the input end of the gas dryer through the connecting pipe, and the output end of the gas dryer communicates with the input end of the ozone generating tube through the pipeline The output end of the ozone generating tube is connected with the input end of the hollow fiber membrane module through the pipeline, the output end of the hollow fiber membrane module is connected with the input end of the metering circulation pump through the pipeline, and the output end of the metering circulation pump is connected with the input end of the metering circulation pump through the pipeline. The connecting pipe communicates. The invention provides ozone to the reaction system through the hollow fiber membrane, and makes the ozone enter the water treatment system without bubbling through the micro pressure, the utilization rate of the ozone is close to 100%, and the oxygen is recycled, and there is no problem of tail gas emission and pollution.

Description

An ozone supply device

technical field

The present invention relates to an ozone supply device.

Background technique

Ozone first appeared in the field of water treatment as a disinfectant. But people soon discovered the ability of ozone to control smell and taste, remove color, iron oxide and manganese. The use of ozone oxidation to treat organic wastewater has a fast reaction speed and high treatment efficiency. Although ozone has been widely used in water treatment, there are some deficiencies in its preparation and application process. At present, the industry mainly uses the silent discharge method to prepare ozone. Even if pure oxygen passes through the discharge area, the amount of ozone produced is only 2-3%. Since most of the processes use the traditional aeration form to provide ozone to the water to be treated, after the produced ozone mixed gas enters the reaction system, a large amount of oxygen is discharged in the form of bubbles as tail gas. At the same time, only part of the ozone entering the water body dissolves into the water to participate in the reaction, and some ozone is discharged together with the air bubbles, resulting in low utilization efficiency of ozone in the system. And because ozone is harmful to the human body, it is often necessary to add an additional exhaust gas treatment device to the reaction system to treat the ozone escaping from the reaction system, resulting in an increase in treatment costs. Therefore, how to improve the utilization rate of oxygen when ozone is generated and the utilization rate of ozone in the application process of ozone is a key issue to reduce the cost of ozone application. The use of hollow fiber membranes to provide gas to water is a recently developed technology, that is, the bubble-free aeration process. The so-called non-bubble aeration refers to the air supply method in which there are no visible bubbles in the liquid phase compared to the traditional bubbling air supply method. Let the gas flow in the lumen of the hydrophobic hollow fiber microporous membrane, and the liquid phase flows outside the tube. Driven by the oxygen partial pressure difference on both sides of the membrane, the gas in the lumen diffuses through the micropores on the membrane wall and enters. in the liquid outside the tube. Due to the small pore size and high pore density of the membrane micropores, the gas is highly dispersed in the membrane, and no bubbles visible to the naked eye are generated during the mass transfer process, and the mass transfer reaches the best condition. This technology directly dissolves the gas into the water body without generating visible bubbles, which can not only reduce energy consumption, but also greatly improve the aeration efficiency, especially in the case of using ozone. High solubility, high ozone mass transfer coefficient and nearly 100% utilization can be obtained. At the same time, since no air bubbles are generated during the aeration process, problems such as foam generation during the air supply process and volatile organic compounds brought out of the water, as well as ozone tail gas pollution can be avoided.

Contents of the invention

The purpose of the present invention is to provide an ozone supply device to solve the problems of low ozone utilization rate, large oxygen consumption and tail gas pollution in the prior art.

The invention includes an oxygen supply device, a first control valve, a gas dryer, an ozone generating tube, an ozone generating tube power supply, a hollow fiber membrane module, a metering circulation pump and a connecting pipe, and the outlet of the oxygen supply device is input through a pipeline and a control valve The output end of the control valve is connected with the input end of the gas dryer through the connecting pipe, the output end of the gas dryer is connected with the input end of the ozone generating tube through the pipeline, and the output end of the ozone generating tube is connected with the hollow fiber through the pipeline The input end of the membrane module is connected, the output end of the hollow fiber membrane module is connected with the input end of the metering circulating pump through the pipeline, the output end of the metering circulating pump is connected with the connecting pipe through the pipeline, and the ozone generating tube is connected to the power supply of the ozone generating tube .

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention provides ozone to the reaction system through the hollow fiber membrane, utilizes the characteristics of high solubility of ozone in water, and makes ozone enter the water treatment system without bubbling through micro pressure, and the utilization rate of ozone is close to 100%. . 2. The system that uses pure oxygen as the raw material to circulate and flow to prepare ozone has high ozone generation efficiency, and the oxygen is recycled, which greatly improves the utilization rate of oxygen. 3. Ozone is consumed or dissolved during the reaction process, the remaining oxygen is recycled, and there is no tail gas emission and pollution problems. 4. The present invention utilizes the bubble-free gas supply technology and the gas recycling device to improve the use efficiency of ozone while saving oxygen consumption.

Description of drawings

Figure 1 is a perspective view of the overall structure of the ozone supply equipment of the present invention, Figure 2 is a schematic structural view of Embodiment 4, and Figure 3 is a schematic structural view of Embodiment 5. FIG. 4 is a working diagram of the hollow fiber membrane module 10 .

Detailed ways

Specific embodiment one: This embodiment is described in conjunction with Fig. 1 and Fig. 4, and this embodiment comprises oxygen supply device 3, first control valve 5, gas drier 7, ozone generating tube 8, ozone generating tube power supply 9, hollow fiber membrane Component 10, metering circulation pump 11 and connecting pipe 16, the outlet of oxygen supply device 3 communicates with the input end of control valve 5 through pipeline, the output end of control valve 5 communicates with the input end of gas dryer 7 through connecting pipe 16, The output end of the gas dryer 7 is communicated with the input end of the ozone generating tube 8 through the pipeline, and the output end of the ozone generating tube 8 is communicated with the input end 10-1 of the hollow fiber membrane module 10 through the pipeline, and the hollow fiber membrane module 10 The output end 10-2 is communicated with the input end of the metering circulation pump 11 through the pipeline, and the output end of the metering circulation pump 11 is communicated with the connecting pipe 16 through the pipeline, and the ozone generating tube 8 is connected with the ozone generating tube power supply 9 . The hollow fiber membrane module 10 is arranged in the reactor 2, and continuously supplies air to the water body to supplement the consumed ozone, so that the oxidation reaction of the water body is balanced and sufficient, and the hollow fiber membrane module 10 is used to provide gas to the water, that is, a bubble-free aeration process. The process technology directly dissolves the gas into the water body without generating visible bubbles, which can not only reduce energy consumption, but also greatly improve the aeration efficiency, especially in the case of using ozone, because the solubility of ozone in water is relatively low. Large, can get a very high ozone mass transfer coefficient and nearly 100% utilization. At the same time, since no air bubbles are generated during the aeration process, problems such as foam generation during the air supply process and volatile organic compounds brought out of the water, as well as ozone tail gas pollution can be avoided. The residual tail gas is returned to the ozone generating pipe 8 through the metering circulation pump 11 for reuse.

Specific embodiment two: present embodiment is illustrated in conjunction with Fig. 2, and the difference between present embodiment and specific embodiment one is: it also increases ozone concentration detector 12 and second gas flow meter 13, the input of ozone concentration detector 12 End is communicated with the output end of metering circulation pump 11 through pipeline, and the input end of second gas flowmeter 13 is communicated with the output end of ozone concentration detector 12 through pipeline, and the output end of second gas flowmeter 13 is through pipeline and The connecting pipe 16 communicates. The ozone concentration detector 12 can determine the residual ozone concentration after the reaction of the gas, and the gas after the ozone concentration analysis passes through the second gas flow meter 13 and returns to the ozone generating tube 8 . Other components and connections are the same as those in the first embodiment.

Specific embodiment three: this embodiment is described in conjunction with Fig. 2, the difference between this embodiment and specific embodiment one is: it also adds a first gas flow meter 4 and a voltage stabilizing control device 6, and the first gas flow meter 4 is set On the pipeline between the control valve 5 and the oxygen supply device 3 , the pressure stabilization control device 6 is arranged on the pipeline between the control valve 5 and the gas dryer 7 . The first gas flow meter 4 is used to monitor the supply rate of the oxygen gas source, and the ozone generating tube 8 is supplied after the voltage stabilization control device 6 is stabilized. The first gas flow meter 4 and the voltage stabilization control device 6 can make the ozone flow in the whole reaction system maintain a stable and continuous supply. Other components and connections are the same as those in the second embodiment.

Embodiment 4: This embodiment is described in conjunction with FIG. 2. The difference between this embodiment and Embodiment 1 is that it also adds a check valve 14 and a vent valve 15, and the check valve 14 is arranged on the second gas flow meter. 13 and the connecting pipe 16, the vent valve 15 is set on the pipeline between the ozone generating pipe 8 and the hollow fiber membrane module 10. The check valve 14 can prevent the reverse flow of the oxygen circuit and ensure the normal circulation of the gas circuit. When the ozone concentration detector 12 detects that the system is abnormal, the ozone generator power supply 9 will be automatically turned off and the residual gas in the loop will be emptied through the vent valve 15 to ensure the safe operation of the system. Other components and connections are the same as those in the third embodiment.

Specific embodiment five: illustrate this embodiment in conjunction with Fig. 3, the difference between this embodiment and specific embodiment one is: it also increases liquid pump 17, second control valve 18, bubble-free ozone reactor 19 and liquid flow rate Count 20, the hollow fiber membrane module 10 is arranged in the bubble-free ozone supply reactor 19, the input end of the bubble-free ozone supply reactor 19 communicates with the output end of the second control valve 18 through the pipeline, and the input of the second control valve 18 The end is communicated with the output end of the liquid pump 17 through the pipeline, and the input end of the liquid flowmeter 20 is communicated with the output end of the bubble-free ozone reactor 19 through the pipeline. The pipeline at the input end of the liquid pump 17 leads to the reactor 2, and the reaction liquid 1 in the reactor 2 is delivered to the bubble-free ozone supply reactor 19 through the liquid pump 17, and the ozone is dissolved in the liquid phase by the hollow fiber membrane module 10. , residual oxygen returns in the ozone generating tube 8. A second control valve 18 and a liquid flow meter 20 can regulate the flow of liquid. Other components and connection relations are the same as those in Embodiment 4.

Working principle: After the oxygen passes through the first control valve 5 and the gas dryer 7, the ozone-containing gas is generated from the ozone generating tube 8. When the mixed gas containing ozone and oxygen passes through the hollow fiber membrane module 10, due to the high solubility of ozone in water, Ozone can diffuse into the reaction solution 1 outside the tube through the micropores 10-3 on the wall of the hollow fiber membrane module 10, and the remaining oxygen is circulated into the connecting pipe 16 by the metering circulation pump 11 to be recycled.

The treatment effect of the present invention will be illustrated by experiments below. In this experiment, ozone was used to disinfect and sterilize water bodies, and the effectiveness of the method and equipment was characterized by the total number of bacteria and the inactivation rate of coliform bacteria. The inactivation rates of the total number of bacteria and coliform bacteria in water are shown in Table 1 and Table 2 at different oxygen usage rates, and the oxygen flow rate in the table is the sum of No. 1 gas flow meter 4 and No. 2 gas flow meter 13 values.

Table 1

Table 2

Claims (5)

1, a kind of ozone supply apparatus, it is characterized in that: it comprises oxygen feedway (3), first control valve (5), gas-drying apparatus (7), ozone generating pipe (8), ozone generating pipe power supply (9), hollow fiber film assembly (10), metering circulating pump (11) and tube connector (16), the outlet of oxygen feedway (3) is communicated with by the input of pipeline with control valve (5), the output of control valve (5) is communicated with the input of gas-drying apparatus (7) by tube connector (16), the output of gas-drying apparatus (7) is communicated with by the input of pipeline with ozone generating pipe (8), the output of ozone generating pipe (8) is communicated with the input (10-1) of hollow fiber film assembly (10) by pipeline, the output (10-2) of hollow fiber film assembly (10) is communicated with by the input of pipeline with metering circulating pump (11), the output of metering circulating pump (11) is communicated with tube connector (16) by pipeline, is connected with ozone generating pipe power supply (9) on the ozone generating pipe (8).

2, a kind of ozone supply apparatus according to claim 1, it is characterized in that: it also comprises ozone concentration detector (12) and second gas flowmeter (13), the input of ozone concentration detector (12) is communicated with by the output of pipeline with metering circulating pump (11), the input of second gas flowmeter (13) is communicated with by the output of pipeline with ozone concentration detector (12), and the output of second gas flowmeter (13) is communicated with tube connector (16) by pipeline.

3, a kind of ozone supply apparatus according to claim 2, it is characterized in that: it also comprises first gas flowmeter (4) and voltage stabilizing control device (6), first gas flowmeter (4) is arranged on the pipeline between control valve (5) and the oxygen feedway (3), and voltage stabilizing control device (6) is arranged on the pipeline between control valve (5) and the gas-drying apparatus (7).

4, a kind of ozone supply apparatus according to claim 3, it is characterized in that: it also comprises check-valves (14) and emptying valve (15), check-valves (14) is arranged on the pipeline between second gas flowmeter (13) and the tube connector (16), and emptying valve (15) is arranged on the pipeline between ozone generating pipe (8) and the hollow fiber film assembly (10).

5, a kind of ozone supply apparatus according to claim 4, it is characterized in that: it also comprises liquid pump (17), second control valve (18), still for ozone reactor (19) and fluid flowmeter (20), hollow fiber film assembly (10) is arranged on still in the ozone reactor (19), still input for ozone reactor (19) is communicated with by the output of pipeline with second control valve (18), the input of second control valve (18) is communicated with by the output of pipeline with liquid pump (17), and the input of fluid flowmeter (20) is communicated with still output for ozone reactor (19) by pipeline.

Images