CN202465434U - Ultraviolet and ozone combined disinfecting device for recycling reclaimed water - Google Patents

Abstract

The utility model relates to an ultraviolet-ozone combined disinfection device for reuse of reclaimed water, comprising a water inlet pipe, an ultraviolet disinfection water tank, a rotor flowmeter, an oxygen steel cylinder, an ozone generator, a Venturi mixer, a reactor and a water outlet pipe. The water inlet pipe is connected to the ultraviolet disinfection water tank, the rotameter and the Venturi mixer in turn through the pipeline, the oxygen cylinder is connected to the ozone generator and the Venturi mixer in turn through the pipeline, and the reactor is connected to the Venturi mixer , the outlet pipe is arranged on the reactor. Compared with the prior art, the utility model has the advantages of good disinfection and sterilization effect, simple device process, convenient maintenance and management, suitable for small and medium-scale reclaimed water disinfection treatment and the like.

Description

A combined ultraviolet and ozone disinfection device for reclaimed water

technical field

The utility model relates to a water treatment device, in particular to an ultraviolet-ozone combined disinfection device for reuse of reclaimed water.

Background technique

With the increasing shortage of water resources, the recycling of sewage is also increasing, and the water quality of reclaimed water has also received more and more attention. Although the conventional treatment process of reclaimed water can remove some microorganisms, the absolute content of microorganisms in the water is considerable, and there may be pathogenic bacteria. Therefore, the disinfection treatment of sewage before reuse is of great significance, and disinfection and sterilization have become an indispensable link in the treatment of reused water. "Code for Design of Reclaimed Water in Buildings" (GB50336-2002) clearly stipulates that "disinfection facilities must be provided for reclaimed water treatment", which also reflects the importance of reclaimed water disinfection.

At present, chlorine disinfection is mainly used for disinfection of reclaimed water in China. Among many water disinfection technologies, chlorine disinfection is the most widely used disinfection and sterilization method in my country due to its mature technology, rich experience and long history of use. However, this disinfection method has certain requirements on the pH of the water, and the water treated with chlorine gas will produce some chlorinated organic compounds that are risky to human health, such as trihalomethanes and haloacetic acids. In addition, the process of preparation, transportation, storage and dosing of chlorine disinfectants is complicated and there are potential safety hazards. Therefore, it is of great significance to choose different disinfection methods (such as ultraviolet disinfection, ozone disinfection, etc.) according to different water quality conditions and treatment requirements.

Technically, ultraviolet disinfection has the advantages of no need to add chemicals, high sterilization efficiency, and fast speed; in terms of economy, its construction, operation, maintenance and other aspects are less expensive than chlorine disinfection. However, ultraviolet disinfection has higher requirements on water quality and has no continuous bactericidal effect. Ozone is a colorless gas with a slight odor. It has strong oxidizing properties, strong disinfection and bactericidal effects, and produces few disinfection by-products. It is called "green disinfectant" and is widely used in drinking water, Disinfection of swimming pools, etc. The effect of ozone disinfection and sterilization is good, and the disinfection efficiency can reach 15 times that of ordinary chlorine disinfection, and it has a certain continuous sterilization ability, no secondary pollution, and also has the functions of decolorization and deodorization. However, the operating cost of ozone disinfection is slightly higher than that of ultraviolet disinfection, and the dosage of ozone is difficult to control accurately. Therefore, the joint disinfection method of ultraviolet and ozone is considered to achieve the purpose of effective disinfection and sterilization of reclaimed water of different water quality, and the sterilization effect is stable. At present, there have been some examples of disinfection technology combined with ultraviolet and ozone applied to tableware and household tap water disinfection.

Contents of the invention

The purpose of this utility model is to provide a UV-ozone combined disinfection device for reuse of reclaimed water, which can achieve stable disinfection and sterilization effects for treating reclaimed water of different water qualities, and has a simple process in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions: an ultraviolet-ozone combined disinfection device for reclaimed water, including a water inlet pipe, an ultraviolet disinfection water tank, a rotor flowmeter, an oxygen cylinder, an ozone generator, and a Venturi mixing device, reactor and water outlet pipe, the water inlet pipe is connected to the ultraviolet disinfection water tank, rotameter and Venturi mixer in turn through the pipeline, and the oxygen cylinder is connected to the ozone generator and the Venturi mixer in turn through the pipeline, and the The reactor is connected with the Venturi mixer, and the outlet pipe is arranged on the reactor.

A regulating valve and a water inlet pump are provided between the water inlet pipe and the ultraviolet disinfection water tank, and an outlet pump is provided between the ultraviolet disinfection water tank and the rotameter.

An oxygen decompression valve is provided between the oxygen cylinder and the ozone generator, and a check valve is provided between the ozone generator and the Venturi mixer.

The ultraviolet disinfection water tank is a sealed partition reactor, and several partitions are arranged in the water tank, and the adjacent partitions are arranged on the opposite sides of the water tank, and the distance between the opposite sides of the water tank is greater than the length of the partitions, The partition divides the water tank into several S-shaped water tanks, and the top of the ultraviolet disinfection water tank is provided with an ultraviolet lamp group.

The partition board is provided with four lines, and the water tank is divided into five tanks, and the ultraviolet lamp group is composed of ultraviolet lamp tubes arranged on the top of each tank.

The reactor is a columnar reactor, which is cylindrical in shape, and a cylindrical sealing sleeve is provided on the top thereof, and an ozone outlet is provided at the upper end of the cylindrical sealing sleeve.

The flow rate in the water inlet pipe is 20-40L/min.

Compared with the prior art, the utility model has the following advantages:

1) The ultraviolet disinfection water tank adopts the clapboard type, which increases the flow rate of the water body in the tank and avoids the dead water area in the tank; the ultraviolet lamp tube group in the tank is above the water surface, which will not cause scaling of the lamp tube, and the inner wall of the tank is polished treatment, which increases the radiation intensity of the ultraviolet lamp; according to the flow rate and water quality of the incoming water, the number of openings of the ultraviolet lamp can be adjusted, and energy can be saved to the greatest extent on the premise of ensuring the disinfection effect; the structure of the ultraviolet disinfection box is simple, and the equipment Easy to install, maintain and manage.

2) Ozone and water are mixed through a Venturi mixer, which improves the mixing effect of ozone and water and increases the concentration of ozone in water.

3) The contact device of ozone and water adopts a columnar reactor, and the direction of water flow adopts upward flow. At the bottom of the reactor, the pressure is relatively high, which increases the solubility of ozone in water, and the escaping ozone is in the same direction as the water flow. After collecting in the middle and upper parts of the reactor, part of the ozone is re-dissolved due to the increase in gas phase concentration, making The ozone concentration in the upper part of the reactor is also higher, which not only improves the utilization rate of ozone but also ensures the water quality of the effluent.

4) The disinfection process of the whole device adopts a combination of ultraviolet and ozone, and has a separate ultraviolet and ozone disinfection reactor, which fully utilizes the advantages of efficient and rapid ultraviolet disinfection and continuous ozone disinfection. For the case of good water quality, the flow rate of the influent water can be appropriately increased, while for the case of poor water quality, a good bactericidal effect can also be guaranteed after the inflow flow rate is appropriately reduced.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the ultraviolet disinfection water tank of the utility model;

Fig. 3 is a sectional view of A-A in Fig. 2 .

In the figure: 1 is the water inlet pipe, 2 is the regulating valve, 3 is the water inlet pump, 4 is the ultraviolet lamp group, 5 is the ultraviolet disinfection water tank, 6 is the water outlet pump, 7 is the rotameter, 8 is the oxygen cylinder, 9 is the oxygen Pressure reducing valve, 10 is an ozone generator, 11 is a check valve, 12 is a Venturi mixer, 13 is a columnar reactor, 14 is an ozone outlet, and 15 is an outlet pipe.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1, a UV-ozone combined disinfection device for reclaimed water includes a water inlet pipe 1, a UV disinfection water tank 5, a rotameter 7, an oxygen cylinder 8, an ozone generator 10, and a Venturi mixer 12 , columnar reactor 13 and outlet pipe 15, water inlet pipe 1 is connected to ultraviolet disinfection water tank 5, the rotameter 7 and Venturi mixer 12 that can monitor real-time flow through pipeline successively; Water inlet pipe 1 and ultraviolet disinfection water tank 5 are provided with regulation Valve 2, water inlet pump 3, and regulating valve 2 are used to adjust the water inlet flow according to different water quality conditions; a water outlet pump 6 is provided between the ultraviolet disinfection water tank 5 and the rotameter 7; the oxygen cylinder 8 is connected to the ozone generator 10 in turn through a pipeline And Venturi mixer 12; Oxygen relief valve 9 is provided between oxygen cylinder 8 and ozone generator 10, in order to regulate the inlet pressure of ozone generator 10; Be provided with check between ozone generator 10 and Venturi mixer 12 The valve 11 is used to prevent water from flowing back into the ozone reactor 10 under special circumstances; the columnar reactor 13 is connected with the Venturi mixer 12 .

The ultraviolet disinfection water tank 5 is a sealed clapboard reactor with a size of 60cm * 30cm * 20cm. Four clapboards are arranged in the water tank, and the space between the clapboards is 12cm. The distance between the opposite sides of the water tank is greater than the length of the clapboard. The clapboard divides the water tank into five tanks. The water flow direction is S-shaped. The top of the disinfection water tank 5 is provided with an ultraviolet lamp group 4, and the ultraviolet lamp 4 is composed of ultraviolet lamps arranged on the top of each water tank. The tube is equipped with a quartz sleeve, which also reduces the loss of ultraviolet light. In addition, the inner wall of the box is polished, which improves the reflection ability of ultraviolet light and enhances the radiation intensity. In actual operation, the number of UV lamps to be turned on can be controlled according to the quality of the influent water, so as to reduce operating costs while ensuring the disinfection effect.

The columnar reactor 13 is cylindrical in shape with a diameter of 30 cm and a height of 1.5 m, and a cylindrical sealing sleeve with a diameter of 50 cm is arranged on the top thereof. Water is fed into the bottom of the columnar reactor 13 and several aeration heads are installed at the bottom to make the gas and water mix evenly; Ozone outlet 14, and use polyethylene pipes to connect the remaining ozone to the subsequent remaining ozone treatment equipment.

The actual reclaimed water samples were used for experiments, and the water samples were taken from the effluent of the secondary sedimentation tank of a sewage treatment plant. The treatment process of the sewage plant is the anaerobic-anoxic-aerobic method (A2/O method). It was 1.26, the number of E. coli was 18.4 million/L, and the number of fecal E. coli was 7,000,000/L.

The operating method of the present utility model is specifically as follows: by adjusting the regulating valve 2 and observing the rotor flowmeter 7, the influent flow rate is controlled at 20-40L/min. When the water depth in the ultraviolet disinfection water tank 5 is 5cm, the residence time of the water sample is about for 20 seconds. The effluent water sterilized by the ultraviolet lamp group is sent to the follow-up reaction equipment by the effluent pump 6 . Ozone is produced in the ozone generator 10 by the pure oxygen from the oxygen cylinder 8, the oxygen pressure reducing valve is adjusted so that the inlet pressure of the ozone generator is 0.1MPa, and the prepared ozone and water sample are mixed through the Venturi mixer 12 Afterwards, it is sent to the columnar reactor 13, and the overflow water from the reactor is discharged through the outlet pipe 15 at the bottom of the top cylindrical casing, and the excess ozone is discharged to the subsequent ozone treatment equipment through the ozone outlet 14 on the top of the cylindrical casing and connected to a polyethylene pipe. After the whole set of equipment was running stably, the water quality was detected, and it was found that Escherichia coli and fecal Escherichia coli could not be detected, and the effluent water quality reached "Urban Sewage Recycling-Urban Miscellaneous Water Quality" (GB/T18920-2002), "Urban Sewage Recycling- Water Quality for Landscape Environment" (GB/T18921-2002) and "Urban Sewage Reuse-Water Quality for Farmland Irrigation" (GB20922-2007) and other reuse water quality standards.

Claims (7)

1. uv ozone combined disinfection device that is used for the water reuse; It is characterized in that; Comprise water inlet pipe, uv sterilisation water tank, spinner-type flowmeter, oxygen bottle, ozonizer, venturi mixer, reactor drum and rising pipe; Described water inlet pipe connects uv sterilisation water tank, spinner-type flowmeter and venturi mixer successively through pipeline; Described oxygen bottle connects ozonizer and venturi mixer successively through pipeline, and described reactor drum is connected with venturi mixer, and described rising pipe is arranged on the reactor drum.

2. a kind of uv ozone combined disinfection device that is used for the water reuse according to claim 1; It is characterized in that; Be provided with variable valve and intake pump between described water inlet pipe and uv sterilisation water tank, be provided with out water pump between described uv sterilisation water tank and spinner-type flowmeter.

3. a kind of uv ozone combined disinfection device that is used for the water reuse according to claim 1 is characterized in that, is provided with the oxygen reducing valve between described oxygen bottle and ozonizer, is provided with vacuum breaker between described ozonizer and venturi mixer.

4. a kind of uv ozone combined disinfection device that is used for the water reuse according to claim 1; It is characterized in that described uv sterilisation water tank is provided with some roads dividing plate for the dividing plate reactor drum of sealing in the described water tank; Adjacent separator is arranged on the relative both sides of water tank; The distance of these relative both sides of water tank is greater than the length of dividing plate, and described dividing plate is divided into several tanks that make flow direction S-type with water tank, and described uv sterilisation tank top is provided with the ultraviolet lamp tube group.

5. a kind of uv ozone combined disinfection device that is used for the water reuse according to claim 4 is characterized in that described dividing plate is provided with four roads, and water tank is divided into five tanks, and described ultraviolet lamp tube group is made up of the ultraviolet lamp tube that is arranged on each sink top.

6. a kind of uv ozone combined disinfection device that is used for the water reuse according to claim 1; It is characterized in that described reactor drum is a cylindrical reactor, it is shaped as cylindrical; Be provided with column sealed sleeve pipe at its top, described column sealed telescopic upper end is provided with the ozone relief outlet.

7. a kind of uv ozone combined disinfection device that is used for the water reuse according to claim 1 is characterized in that the flow in the described water inlet pipe is 20～40L/min.

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