CN210367296U

CN210367296U - Ultraviolet-chlorination-ultrasonic wave reinforced sterilization pretreatment device

Info

Publication number: CN210367296U
Application number: CN201920505638.9U
Authority: CN
Inventors: 韩买良; 孙振宇
Original assignee: China Huadian Engineering Group Co Ltd
Current assignee: China Huadian Engineering Group Co Ltd
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2020-04-21
Anticipated expiration: 2029-04-15

Abstract

The utility model provides an ultraviolet-chlorination-ultrasonic wave reinforcement sterilization pretreatment device, which treats the seawater which is subjected to clarification pretreatment according to the following steps: (1) ultraviolet treatment; (2) treating with chlorine; (3) the device comprises a container and a controller, wherein the container is sequentially divided into an ultraviolet chamber, a chlorine adding chamber and an ultrasonic chamber by a partition plate from a water inlet side to a water outlet side, an ultraviolet lamp tube is installed in the ultraviolet chamber, a chemical adding device is installed in the chlorine adding chamber, an ultrasonic generator is installed in the ultrasonic chamber, and a sewage discharge outlet is also installed in the ultrasonic chamber. The utility model provides an ultraviolet-chlorination-ultrasonic wave intensive sterilization pretreatment process and device have the efficiency of disinfecting high, can guarantee to reach the deactivation more than 80% to the microorganism, do not produce poisonous accessory substance, practice thrift chemical agent expense and reach more than 80%, and device operation safe and reliable easily realizes intelligent control, and equipment maintenance is simple, and the working costs low grade advantage.

Description

Ultraviolet-chlorination-ultrasonic wave reinforced sterilization pretreatment device

Technical Field

The utility model relates to a water treatment field, concretely relates to ultraviolet-chlorination-ultrasonic wave reinforcement sterilization preprocessing device, especially a sea water desalination system sterilization processing apparatus for full embrane method.

Background

In a membrane-method seawater desalination system, of the common membrane pollution types (precipitation pollution, microbial pollution, colloid pollution and the like), the influence of the microbial pollution on a reverse osmosis water treatment system is the most serious, and the desalination rate and the water yield of the reverse osmosis water treatment system can be reduced. The microorganisms comprise bacteria, viruses, fungi and some small protists, and the marine microorganisms are mostly micron-sized fine pollutants, cannot be completely intercepted by a cartridge filter (5 mu m), and can be rapidly propagated and aggregated. Microorganisms can adhere to each other by means of secreted Extracellular Polymeric Substances (EPS) and attach to the surfaces of pipelines, filter elements and the like of a water treatment system to cause pollution blockage and pollution to the system, and in severe cases, filter elements of security filters need to be replaced even for several hours.

The conventional water treatment disinfection and sterilization methods are generally classified into physical methods and chemical methods. The chemical method has low cost, but the use of a large amount of chemical agents can cause secondary pollution to the environment. The disadvantages of the single physical method are limited sterilization effect and high energy consumption. The patent provides an efficient and environment-friendly sterilization method according to the mechanisms of several sterilization processes, has a good sterilization effect, has high treatment speed and high efficiency, does not cause secondary pollution and can play a certain bacteriostatic role compared with the disinfection and sterilization methods in the traditional water treatment such as chlorine disinfection, activated carbon adsorption, biomembrane and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ultraviolet-chlorination-ultrasonic wave reinforcement sterilization preprocessing device, have that the processing procedure is simple, effectual, do not produce poisonous accessory substance, device operation safe and reliable easily realizes intelligent control, and equipment maintenance is simple, characteristics such as working costs low.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a seawater desalination and sterilization pretreatment process adopting an ultraviolet-chlorination-ultrasonic reinforcement synergistic membrane method comprises the following steps of treating seawater subjected to clarification pretreatment: (1) ultraviolet treatment; (2) chlorination treatment; (3) and (4) ultrasonic treatment.

Preferably, in the ultraviolet-chlorination-ultrasonic enhancement synergistic membrane seawater desalination sterilization pretreatment process, the wavelength range of ultraviolet rays in the step (1) is 250-280 nm. The ultraviolet rays have high sterilization efficiency, almost can kill all bacteria, cannot generate secondary pollution, but have weak penetrating power and are greatly influenced by suspended matters in liquid. The effect of first irradiating with ultraviolet rays and then adding chlorine is superior to that of first adding chlorine and then irradiating with ultraviolet rays. The ultrasonic wave and the ultraviolet effect can break larger particles in the liquid, so that microorganisms on the larger particles or wrapped by the larger particles are exposed to ultraviolet radiation, the sterilization effect of the ultraviolet is improved, and the speed of the light reactivation of the escherichia coli is effectively inhibited.

Preferably, in the ultraviolet-chlorination-ultrasonic enhancement synergistic membrane seawater desalination sterilization pretreatment process, chlorination in the step (2) is performed by continuously adding chemicals into sodium hypochlorite, and the chlorination amount is 0.5 mg/L. The addition of chemical bactericide is a commonly used sterilization method in water treatment, and the combination of ultrasonic, ultraviolet and chlorination bactericide can not only give full play to the effect of the bactericide, but also reduce the dosage of the bactericide by 60-80% to achieve the best sterilization effect. Compared with single disinfection and inactivation, the combined disinfection of ultraviolet rays and chlorine has obviously improved effect, and the effect of firstly irradiating the ultraviolet rays and then adding chlorine is superior to the effect of firstly adding the chlorine and then irradiating the ultraviolet rays.

Preferably, in the ultraviolet-chlorination-ultrasonic enhancement synergistic membrane seawater desalination sterilization pretreatment process, the ultrasonic pulse width of the ultrasonic treatment in the step (3) is 10ms, the frequency is 30-50 kHz, and the ultrasonic sound intensity is 30-50W/cm²。

Preferably, in the ultraviolet-chlorination-ultrasonic enhancement synergistic membrane seawater desalination sterilization pretreatment process, the temperature of the water body subjected to ultrasonic treatment in the step (3) is 5-30 ℃.

Ultrasonic sterilization has gained increasing attention as an environmentally friendly sterilization method. The ultrasonic wave is a mechanical wave with frequency more than 20000Hz, has high frequency and short wavelength, and generates cavitation effect in the process of liquid transmission and mechanical effect, thermal effect and the like caused by the cavitation effect. When the ultrasonic intensity exceeds a certain cavitation threshold value in liquid, cavitation phenomenon can be generated, namely tiny bubble nuclei (gas or vapor bubble nuclei) in the liquid are activated under the action of ultrasonic waves, and the liquid shows a series of dynamic processes such as oscillation, growth, shrinkage and collapse of the bubble nuclei. At the moment when the cavitation bubbles are adiabatically contracted and collapsed, high temperature and temperature variation and strong shock waves are present in the bubbles. Such high explosive pressures will either explode some bacteria in the liquid or cause some viruses, or even rupture and dissolve the bacterial morphological structure. In different water treatment systems, the sterilization effect of the ultrasonic wave is different under different control conditions. According to the working mechanism of ultrasonic sterilization, the influencing factors mainly comprise ultrasonic frequency, ultrasonic sound intensity, irradiation time, medium temperature, viscosity coefficient and the like. In a certain frequency range, the sterilization effect of high-frequency ultrasound is better than that of low-frequency ultrasound, but after the ultrasound frequency exceeds a certain frequency, the expansion time of sound waves is shortened, and the sound waves are not as long as being compressed and crushed until collapsing, so that the cavitation intensity is reduced. The sound intensity is another important factor influencing the ultrasonic sterilization efficiency. When the sound intensity of the ultrasonic wave exceeds the cavitation threshold value, the sound cavitation intensity is correspondingly increased along with the increase of the sound intensity, but after the sound intensity is increased to a certain limit, the cavitation bubbles are excessively increased in the negative pressure phase of the sound wave, so that the cavitation bubbles cannot be compressed to collapse in time in the positive pressure phase of the sound wave, and the cavitation effect is weakened. Generally, the higher the liquid temperature, the more advantageous the cavitation generation. This is due to the fact that the surface tension of water decreases with increasing temperature, with a corresponding decrease in cavitation threshold. However, when the temperature is too high, the vapor pressure in the bubbles is correspondingly increased, and the gas content in the liquid is also correspondingly reduced, so that the energy loss is increased when the cavitation bubbles collapse, and the strength of the cavitation effect is weakened. The temperature of the water solution is controlled below 30 ℃ generally, and the cavitation effect is better.

The device for the seawater desalination sterilization pretreatment process by using the ultraviolet-chlorination-ultrasonic enhancement synergistic membrane method comprises a container and a controller, wherein one end of the container is a water inlet pipe, the other end of the container is a water outlet pipe, the container is sequentially divided into a ultraviolet chamber, a chlorination chamber and an ultrasonic chamber by partition plates from a water inlet side to a water outlet side, the lower part of the partition plate between the ultraviolet chamber and the chlorination chamber is provided with a hole, the upper part of the partition plate between the chlorination chamber and the ultrasonic chamber is provided with holes, the number of the holes is preferably 2 for each partition plate, and the diameter of each hole is calculated and determined according to equipment series with different. An ultraviolet lamp tube is installed in the ultraviolet chamber, a dosing device is installed in the chlorine adding chamber, an ultrasonic generator is installed in the ultrasonic chamber, a sewage discharge outlet is also installed on the ultrasonic chamber, and the ultraviolet lamp tube, the dosing device and the pulse type ultrasonic generator are respectively connected with a controller. Under the action of low-frequency ultrasonic waves, jet flow formed by periodic oscillation and acoustic cavitation of the ultrasonic waves forms mechanical shearing force in water, large zoogloea can be broken into single microorganisms, and continuous sterilization capability is provided for ultraviolet and chlorination treatment.

Further, in the seawater desalination and sterilization pretreatment device adopting the ultraviolet-chlorination-ultrasonic enhancement synergistic membrane method, the container is made of an ultraviolet-resistant and corrosion-resistant PET (polyethylene terephthalate plastic) material.

Furthermore, in the ultraviolet-chlorination-ultrasonic enhancement synergistic membrane seawater desalination sterilization pretreatment device, the ultraviolet lamp tube is formed by pouring a polyester shell and a gasket which are reinforced by glass fibers, so that reliable sealing is ensured. The ultraviolet lamp can be selected from the products of the prior art, but the sealing and the water proofing are ensured.

Further, in the ultraviolet-chlorination-ultrasonic enhancement synergistic membrane method seawater desalination sterilization pretreatment device, a piezoelectric ultrasonic transducer of the ultrasonic generator is integrated on the controller.

Further, in the seawater desalination and sterilization pretreatment device adopting the ultraviolet-chlorination-ultrasonic enhanced collaborative membrane method, a Wi-Fi module is installed on the controller. The intelligent network control mode can be adopted, and the work and the non-work of the load can be controlled, the timing time can be set and the like by transmitting a control instruction through a Wi-Fi network.

The utility model has the advantages that: the utility model provides an ultraviolet-chlorination-ultrasonic wave intensive sterilization preprocessing device has the high efficiency of disinfecting, can guarantee to reach the deactivation more than 80% to the microorganism, does not produce poisonous accessory substance, practices thrift chemical agent expense and reaches more than 80%, and device operation safe and reliable easily realizes intelligent control, and equipment maintenance is simple, and the working costs low grade advantage.

Drawings

Fig. 1 is a schematic diagram of the ultraviolet-chlorination-ultrasonic wave reinforcement synergistic membrane seawater desalination sterilization pretreatment device of the present invention.

Fig. 2 is a schematic view of the installation position of the ultraviolet-chlorination-ultrasonic wave reinforcement synergistic membrane seawater desalination and sterilization pretreatment device in a conventional membrane seawater desalination system.

Reference numerals: 1-container, 2-controller, 3-ultraviolet lamp tube, 4-chemical adding device, 5-ultrasonic generator, 6-sewage outlet, 101-ultraviolet chamber, 102-chlorination chamber, 103-ultrasonic chamber, 7-flocculation clarifier, 8-the utility model discloses sterilization preprocessing device, 9-ORP instrument, 10-cartridge filter, 11-high-pressure pump, 12-reverse osmosis device, 13-reverse osmosis fresh water tank, 14-energy recovery device.

Detailed Description

Example 1

A seawater desalination and sterilization pretreatment device adopting an ultraviolet-chlorination-ultrasonic enhanced synergistic membrane method comprises a container 1 and a controller 2, wherein one end of the container 1 is provided with a water inlet pipe, the other end of the container is provided with a water outlet pipe, the container 1 is sequentially divided into an ultraviolet chamber 101, a chlorination chamber 102 and an ultrasonic chamber 103 by partition plates from a water inlet side to a water outlet side, a hole is formed in the lower portion of the partition plate between the ultraviolet chamber 101 and the chlorination chamber 102, a hole is formed in the upper portion of the partition plate between the chlorination chamber 102 and the ultrasonic chamber 103, an ultraviolet lamp tube 3 is installed in the ultraviolet chamber 101, a dosing device 4 is installed in the chlorination chamber 102, an ultrasonic generator 5 is installed in the ultrasonic chamber 103, a sewage discharge port 6 is further installed in the ultrasonic chamber 103, and the ultraviolet lamp tube 3, the dosing device 4 and the pulse.

Example 2

The container 1 is made of anti-ultraviolet and corrosion-resistant PET material.

Example 3

The container 1 is made of an anti-ultraviolet and corrosion-resistant PET material; the ultraviolet lamp tube 3 is formed by casting a polyester shell and a gasket which are reinforced by glass fiber, so that the sealing reliability is ensured.

Example 4

The container 1 is made of an anti-ultraviolet and corrosion-resistant PET material; the ultraviolet lamp tube 3 is a product in the prior art, but sealing and water proofing are ensured; the piezoelectric ultrasonic transducer of the ultrasonic generator 5 is integrated on the controller 2.

Example 5

The container 1 is made of an anti-ultraviolet and corrosion-resistant PET material; the ultraviolet lamp tube 3 is formed by casting a polyester shell and a gasket which are reinforced by glass fiber, so that the sealing reliability is ensured; the piezoelectric ultrasonic transducer of the ultrasonic generator 5 is integrated on the controller 2, and a Wi-Fi module is mounted on the controller 2.

During the in-service use, the sea water after the preliminary treatment gets into the utility model discloses an ultraviolet-chlorination-ultrasonic wave strengthens in coordination with embrane method sea water desalination sterilization preprocessing device and disinfects, the security filter, high-pressure pump, the reverse osmosis unit that connect gradually through the pipeline again, processing system still including installing thermometer, manometer, flow meter, PH table, conductivity table, chlorine residue table, oxidation reduction potential table etc. in the system. The seawater desalination and sterilization pretreatment device adopting the ultraviolet-chlorination-ultrasonic enhanced synergistic membrane method is controlled according to the temperature meter, the pressure meter, the flow meter, the PH meter, the conductivity meter, the residual chlorine meter, the oxidation-reduction potential meter and the flow parameters of inlet and outlet water, and a programmable logic controller of the controller can be used for setting the parameters and selecting different synergistic modes according to different water quality working conditions.

In order to verify the effect of the ultraviolet-chlorination-ultrasonic wave strengthening synergistic membrane seawater desalination sterilization pretreatment device, the seawater desalination system of a certain power plant is installed. After the power plant seawater desalination system is put into operation in the early stage, the filter element of the security filter is polluted and blocked due to the high microbial content of seawater, and the filter element needs to be replaced by a new filter element every two days. In addition, the water yield of the first-stage reverse osmosis of the seawater desalination is reduced, and the first two membranes of each container are polluted by microorganisms. The field test is installed additionally behind sea water desalination integration sea water pretreatment device the utility model discloses ultraviolet-chlorination-ultrasonic wave reinforce in coordination with embrane method sea water desalination pretreatment device that disinfects has thoroughly solved the microbial contamination problem. The water treatment system comprises the following processes: circulating water seawater intake pipe → integrated seawater pretreatment → the utility model discloses ultraviolet-chlorination-ultrasonic wave reinforcement is in coordination with embrane method seawater desalination pretreatment device that disinfects → multimedium filter → fine sand filter → cartridge filter (5 μm) → first order (seawater) reverse osmosis → second order (brackish water) reverse osmosis → mixed bed → demineralized water tank → main factory building.

The main equipment is as follows: 2 x 60t/h integrated pretreatment, 2 x phi 3000 multi-medium filter, 2 x phi 3000 fine sand filter, 2 x 17t/h seawater reverse osmosis and 2 x phi 800 mixed bed.

Designing water temperature: 5 to 30 ℃.

Raw water quality: suspended matter 22(mg/L), TDS4420(mg/L), COD <5(mg/L), total bacteria amount 240000 (pieces/L).

Water pressure of source water: 0.30 MPa.

The type of the reverse osmosis membrane: dow BW30 HRLE-400.

First-stage reverse osmosis water yield: 2X 20m³/h。

First-stage reverse osmosis recovery rate: not less than 40 percent.

Residual chlorine: less than 0.1 mg/L.

The utility model discloses ultraviolet-chlorination-ultrasonic wave is reinforceed in coordination with embrane method sea water desalination pretreatment device total power that disinfects: 2 KW.

Through the experiment, adopt the utility model discloses ultraviolet-chlorination-ultrasonic wave reinforce in coordination with embrane method sea water desalination sterilization preprocessing device bactericidal effect is good, can guarantee to reach the deactivation of microorganism more than 80%, practices thrift chemical agent expense 80%, does not have secondary pollution.

Claims

1. An ultraviolet-chlorination-ultrasonic wave reinforced sterilization pretreatment device is characterized by comprising a container (1) and a controller (2), wherein container (1) one end is the inlet tube and the other end is the outlet pipe, container (1) is separated in proper order from the side of intaking to the play water side and is ultraviolet room (101), chlorination room (102) and ultrasonic wave room (103), the baffle lower part trompil between ultraviolet room (101) and chlorination room (102), the baffle upper portion trompil between chlorination room (102) and ultrasonic wave room (103), install ultraviolet fluorescent tube (3) in ultraviolet room (101), install charge device (4) in chlorination room (102), install ultrasonic generator (5) and still install drain (6) on ultrasonic wave room (103) in ultrasonic wave room (103), ultraviolet fluorescent tube (3), charge device (4) and pulsed ultrasonic generator (5) link to each other with controller (2) respectively.

2. The ultraviolet-chlorination-ultrasonic wave reinforced sterilization pretreatment device according to claim 1, wherein the container (1) is made of a PET material with ultraviolet resistance and corrosion resistance.

3. The ultraviolet-chlorination-ultrasonic wave reinforced sterilization pretreatment device according to claim 1, wherein the ultraviolet lamp tube (3) is formed by casting a polyester shell and a gasket which are reinforced by glass fiber, so that reliable sealing is ensured.

4. The ultraviolet-chlorination-ultrasonic wave enhanced sterilization pretreatment device according to claim 1, wherein the piezoelectric ultrasonic transducer of the ultrasonic generator (5) is integrated on the controller (2).

5. The ultraviolet-chlorination-ultrasonic wave reinforced sterilization pretreatment device according to any one of claims 1 to 4, wherein a Wi-Fi module is installed on the controller (2).