CN111099693A - Tap water ultrasonic dechlorination device and working method thereof - Google Patents

Tap water ultrasonic dechlorination device and working method thereof Download PDF

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Publication number
CN111099693A
CN111099693A CN202010020373.0A CN202010020373A CN111099693A CN 111099693 A CN111099693 A CN 111099693A CN 202010020373 A CN202010020373 A CN 202010020373A CN 111099693 A CN111099693 A CN 111099693A
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screw
piezoelectric ceramic
bending vibration
connecting column
double
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CN111099693B (en
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王亮
王健安
金家楣
杨淋
赵淳生
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/34Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/12Halogens or halogen-containing compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/002Construction details of the apparatus

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)

Abstract

The invention discloses a tap water ultrasonic dechlorination device and a working method thereof, wherein the tap water ultrasonic dechlorination device comprises two bending vibration bodies, a variable cross-section stress screw rod, a first balancing weight, a second balancing weight, 4N piezoelectric ceramic plates, a flange plate and two pre-tightening nuts; the variable cross-section stress screw comprises a first connecting column, a first round table, a double-end screw, a second round table and a second connecting column which are coaxially and fixedly connected in sequence; the two pretightening nuts are respectively in threaded connection with two ends of the double-head screw, and the first balancing weight, the N piezoelectric ceramic pieces, the flange plate, the N piezoelectric ceramic pieces and the second balancing weight are fixed on the double-head screw; the other ends of the first connecting column and the second connecting column are respectively and rigidly connected with the centers of the outer end faces of the closed ends of the two bending vibration bodies. When the device works, the variable cross-section stress screw and the two bending vibration bodies are excited to generate an ultrasonic field radiated in all directions, and residual chlorine element in tap water is purified. The invention has simple structure, low power consumption and no secondary pollution.

Description

Tap water ultrasonic dechlorination device and working method thereof
Technical Field
The invention relates to the technical field of domestic water residual chlorine removal, in particular to a tap water ultrasonic dechlorination device and a working method thereof.
Background
Chlorine is widely used in the sterilization of water treatment because it has a strong inactivation effect on pathogenic microorganisms. However, the treated water contains residual chlorine, which can affect and harm the taste of drinking water, human health, food and beverage quality, ion exchange and membrane separation technical equipment. In particular, chlorination of tap water is effective in killing germs, but also produces a large amount of halogenated hydrocarbon compounds, and the content of chlorinated organic compounds is multiplied, which is a serious source of various diseases for human beings. The main purpose of the chlorination of public water supply is to prevent water from spreading diseases, the method has been popularized for more than 110 years so far, has relatively perfect production technology and equipment, most domestic and foreign waterworks still adopt the technological methods of precipitation, filtration, chlorination and disinfection so far, and river water or underground water is simply processed into drinkable water.
The water containing residual chlorine can destroy the nutrient components of vitamins, minerals and the like in vegetables, fruits and grains and seriously affect the absorption of nutrient substances by human bodies. Chlorine used in tap water can be absorbed rapidly and easily by any oxidation surface layer with capillary pores such as skin, nostril, oral cavity, lung, hair, eye, meat, vegetable, etc. Because the surface layer of human skin is covered by pores and sweat glands, residual chlorine can easily enter the human body through the fine pores to be absorbed at the moment of contact with tap water. Bathing with tap water containing residual chlorine, wherein four of the total chlorine in the bathroom is inhaled through respiratory tract, the three chlorine is absorbed by skin, and is 6-8 times of chlorine entering human body by drinking, mild people generate pruritus, and the carcinogenic rate of middle-aged people is increased by 30% in the long term. After the chlorine is heated, the chlorine and organic humus in water generate carcinogenic substances such as trichloromethane, the trichloromethane is increased by 3-4 times compared with tap water, and if the residual chlorine cannot be removed, the carcinogenic substances are increased by 3-4 times in the body of the coffee, tea or soup drunk by people every day after the coffee, tea or soup is heated and boiled for drinking. Long-term drinking of water containing residual chlorine can greatly increase the incidence rate of heart diseases, coronary atherosclerosis, anemia, bladder cancer, liver cancer, rectal cancer, hypertension, allergy and other diseases.
The removal of residual chlorine from water has become an important issue in order to avoid the harm caused by residual chlorine. A scheme for efficiently removing residual chlorine in water is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a tap water ultrasonic dechlorination device and a working method thereof aiming at the defects in the background technology.
The invention adopts the following technical scheme to solve the technical problems
An ultrasonic tap water dechlorination device comprises a first bending vibration body, a second bending vibration body, a variable cross-section stress screw rod, a first balancing weight, a second balancing weight, 4N piezoelectric ceramic plates, a flange plate, a first pre-tightening nut and a second pre-tightening nut, wherein N is a natural number which is more than or equal to 1;
the first bending vibration body and the second bending vibration body have the same structure and are hollow metal cylinders with one open end and one closed end;
the variable cross-section stress screw comprises a first connecting column, a first round table, a double-head screw, a second round table and a second connecting column, wherein the smaller ends of the first round table and the second round table are coaxially and fixedly connected with one ends of the first connecting column and the second connecting column respectively, and the larger ends of the first round table and the second round table are coaxially and fixedly connected with two ends of the double-head screw respectively; the diameter of the smaller end of the first round platform is larger than or equal to the diameter of the section of the first connecting column, and the diameter of the larger end of the first round platform is smaller than or equal to the diameter of the section of the double-ended screw; the variable cross-section stress screw is centrosymmetric;
the first balancing weight, the second balancing weight and the 4N piezoelectric ceramic plates are all in a circular ring shape;
the flange plate is provided with a through hole for the double-end screw to pass through;
the first pre-tightening nut and the second pre-tightening nut are respectively in threaded connection with two ends of the double-threaded screw, the first balancing weight, the 2N piezoelectric ceramic pieces, the flange plate, the 2N piezoelectric ceramic pieces and the second balancing weight are fixed on the double-threaded screw, the 4N piezoelectric ceramic pieces are tightly pressed to provide pre-tightening force, and the flange plate is located at the center of the double-threaded screw;
the 4N piezoelectric ceramic pieces are longitudinal vibration ceramic pieces and are polarized along the thickness direction, and the polarization directions of the two adjacent piezoelectric ceramic pieces are opposite;
the flange plate is used for fixing the tap water ultrasonic dechlorination device;
and the other ends of the first connecting column and the second connecting column are respectively and rigidly connected with the centers of the outer end faces of the closed ends of the first bending vibration body and the second bending vibration body.
As a further optimization scheme of the tap water ultrasonic dechlorination device, food-grade waterproof glue is coated on the 4N piezoelectric ceramic sheets.
The invention also discloses a control method of the tap water ultrasonic dechlorination device, which comprises the following steps:
the voltage with the same phase and the frequency of the first-order longitudinal resonance frequency of the variable cross-section stress screw is applied to the 4N piezoelectric ceramic plates, the first-order longitudinal resonance mode of the variable cross-section stress screw is excited, the bending vibration modes of the first bending vibration body and the second bending vibration body are excited at the same time, vibration of an ultrasonic frequency band is generated, ultrasonic waves are radiated upwards, downwards, forwards, backwards, leftwards and rightwards in water in an all-around mode, a strong acoustic cavitation phenomenon is generated in the water, and the decomposition of hypochlorous acid in the water and the elimination of chlorine are accelerated.
The ultrasonic removal of residual chlorine in tap water is a new water purification technology, and the residual chlorine in the tap water mainly comprises HClO and Cl2And ClOAnd the like.
The principle of removing residual chlorine in water by ultrasonic wave is as follows: when high intensity ultrasonic waves propagate in a liquid medium, longitudinal waves are generated, thereby creating regions of alternating compression and expansion, which are prone to cavitation and the formation of micro-bubble nuclei in the medium. At the moment of adiabatic shrinkage and collapse, the micro bubble nuclei present high temperature of over 5000 ℃ and pressure of 50000kPa inside, so that the decomposition of hypochlorous acid in water and the discharge of chlorine gas are accelerated, and the aim of efficiently purifying water is fulfilled.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
the tap water ultrasonic dechlorination device has the advantages of simple internal structure, thorough removal of residual chlorine in water, low power consumption, no secondary pollution and the like.
Drawings
FIG. 1 is a schematic diagram of the structure of an ultrasonic dechlorination device for tap water;
FIG. 2 is a schematic diagram of the polarization direction and the power-up mode of the piezoelectric ceramic wafer;
fig. 3 is a schematic view of vibration modes of the first bending vibration body, the second bending vibration body and the variable cross-section stress screw.
In the figure, 1-a first bending vibration body, 2-a first connecting column, 3-a first circular truncated cone, 4-a double-headed screw, 5-a first pre-tightening nut, 6-a first balancing weight, 7-a piezoelectric ceramic plate, 8-a flange plate and 9-a second pre-tightening nut.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, components are exaggerated for clarity.
In the 30 s of the 20 th century, the first use of ultrasonic cavitation to degas liquids and liquid metals was proposed. Ultrasonic waves are transmitted in liquid, pressure fluctuation can be generated in space and time, and a negative pressure phenomenon occurs. In the negative pressure region, acoustic cavitation occurs and microbubbles are formed. Under the action of ultrasound, a series of dynamic processes of cavitation bubbles occur: oscillate, expand, contract, or even collapse. These activities generate thousands of high temperatures and thousands of atmospheres of high pressure inside the cavitation bubbles. This accelerates the decomposition of hypochlorous acid in the water. At the same time, the ultrasound causes chlorine and oxygen to gradually penetrate into the cavitation bubbles and to be detached from the water by means of the ultrasonic degassing effect, which further promotes the decomposition of hypochlorous acid.
The method is based on the ultrasonic cavitation principle to efficiently remove the residual chlorine in the water.
As shown in fig. 1, the invention discloses a tap water ultrasonic dechlorination device, which comprises a first bending vibration body, a second bending vibration body, a variable cross-section stress screw, a first balancing weight, a second balancing weight, 4N piezoelectric ceramic plates, a flange plate, a first pre-tightening nut and a second pre-tightening nut, wherein N is a natural number more than or equal to 1;
the first bending vibration body and the second bending vibration body have the same structure and are hollow metal cylinders with one open end and one closed end;
the variable cross-section stress screw comprises a first connecting column, a first round table, a double-head screw, a second round table and a second connecting column, wherein the smaller ends of the first round table and the second round table are coaxially and fixedly connected with one ends of the first connecting column and the second connecting column respectively, and the larger ends of the first round table and the second round table are coaxially and fixedly connected with two ends of the double-head screw respectively; the diameter of the smaller end of the first round platform is larger than or equal to the diameter of the section of the first connecting column, and the diameter of the larger end of the first round platform is smaller than or equal to the diameter of the section of the double-ended screw; the variable cross-section stress screw is centrosymmetric;
the first balancing weight, the second balancing weight and the 4N piezoelectric ceramic plates are all in a circular ring shape;
the flange plate is provided with a through hole for the double-end screw to pass through;
the first pre-tightening nut and the second pre-tightening nut are respectively in threaded connection with two ends of the double-threaded screw, the first balancing weight, the 2N piezoelectric ceramic pieces, the flange plate, the 2N piezoelectric ceramic pieces and the second balancing weight are fixed on the double-threaded screw, the 4N piezoelectric ceramic pieces are tightly pressed to provide pre-tightening force, and the flange plate is located at the center of the double-threaded screw;
as shown in fig. 2, the 4N piezoelectric ceramic pieces are longitudinal vibration ceramic pieces, and are polarized along the thickness direction, and the polarization directions of two adjacent piezoelectric ceramic pieces are opposite;
the flange plate is used for fixing the tap water ultrasonic dechlorination device;
and the other ends of the first connecting column and the second connecting column are respectively and rigidly connected with the centers of the outer end faces of the closed ends of the first bending vibration body and the second bending vibration body.
And the 4N piezoelectric ceramic sheets are coated with food-grade waterproof glue.
As shown in fig. 3, the invention also discloses a control method of the tap water ultrasonic dechlorination device, which comprises the following steps:
the voltage with the same phase and the frequency of the first-order longitudinal resonance frequency of the variable cross-section stress screw is applied to the 4N piezoelectric ceramic plates, the first-order longitudinal resonance mode of the variable cross-section stress screw is excited, the bending vibration modes of the first bending vibration body and the second bending vibration body are excited at the same time, vibration of an ultrasonic frequency band is generated, ultrasonic waves are radiated upwards, downwards, forwards, backwards, leftwards and rightwards in water in an all-around mode, a strong acoustic cavitation phenomenon is generated in the water, and the decomposition of hypochlorous acid in the water and the elimination of chlorine are accelerated.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. An ultrasonic tap water dechlorination device is characterized by comprising a first bending vibration body, a second bending vibration body, a variable cross-section stress screw rod, a first balancing weight, a second balancing weight, 4N piezoelectric ceramic plates, a flange plate, a first pre-tightening nut and a second pre-tightening nut, wherein N is a natural number more than or equal to 1;
the first bending vibration body and the second bending vibration body have the same structure and are hollow metal cylinders with one open end and one closed end;
the variable cross-section stress screw comprises a first connecting column, a first round table, a double-head screw, a second round table and a second connecting column, wherein the smaller ends of the first round table and the second round table are coaxially and fixedly connected with one ends of the first connecting column and the second connecting column respectively, and the larger ends of the first round table and the second round table are coaxially and fixedly connected with two ends of the double-head screw respectively; the diameter of the smaller end of the first round platform is larger than or equal to the diameter of the section of the first connecting column, and the diameter of the larger end of the first round platform is smaller than or equal to the diameter of the section of the double-ended screw; the variable cross-section stress screw is centrosymmetric;
the first balancing weight, the second balancing weight and the 4N piezoelectric ceramic plates are all in a circular ring shape;
the flange plate is provided with a through hole for the double-end screw to pass through;
the first pre-tightening nut and the second pre-tightening nut are respectively in threaded connection with two ends of the double-threaded screw, the first balancing weight, the 2N piezoelectric ceramic pieces, the flange plate, the 2N piezoelectric ceramic pieces and the second balancing weight are fixed on the double-threaded screw, the 4N piezoelectric ceramic pieces are tightly pressed to provide pre-tightening force, and the flange plate is located at the center of the double-threaded screw;
the 4N piezoelectric ceramic pieces are longitudinal vibration ceramic pieces and are polarized along the thickness direction, and the polarization directions of the two adjacent piezoelectric ceramic pieces are opposite;
the flange plate is used for fixing the tap water ultrasonic dechlorination device;
and the other ends of the first connecting column and the second connecting column are respectively and rigidly connected with the centers of the outer end faces of the closed ends of the first bending vibration body and the second bending vibration body.
2. The ultrasonic dechlorination device of tap water according to claim 1, wherein the 4N piezoelectric ceramic plates are coated with food-grade waterproof glue.
3. The control method of the tap water ultrasonic dechlorination device based on the claim 1 is characterized by comprising the following steps:
the voltage with the same phase and the frequency of the first-order longitudinal resonance frequency of the variable cross-section stress screw is applied to the 4N piezoelectric ceramic plates, the first-order longitudinal resonance mode of the variable cross-section stress screw is excited, the bending vibration modes of the first bending vibration body and the second bending vibration body are excited at the same time, vibration of an ultrasonic frequency band is generated, ultrasonic waves are radiated upwards, downwards, forwards, backwards, leftwards and rightwards in water in an all-around mode, a strong acoustic cavitation phenomenon is generated in the water, and the decomposition of hypochlorous acid in the water and the elimination of chlorine are accelerated.
CN202010020373.0A 2020-01-09 2020-01-09 Ultrasonic tap water chlorine removal device and working method thereof Active CN111099693B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113775772A (en) * 2021-08-25 2021-12-10 南京航空航天大学 Aviation fuel metering and adjusting piezoelectric valve and working method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106477667A (en) * 2016-12-07 2017-03-08 南京航空航天大学 A kind of method and device for going chlorine residue in eliminating water based on ultrasound
CN108176574A (en) * 2017-12-19 2018-06-19 天津工业大学 A kind of more amplitude piezoelectric ultrasonic transducers of series composite structure double frequency
CN110589929A (en) * 2019-10-12 2019-12-20 周楚新 Self-powered omnibearing integrated ultrasonic algae removal device and working method thereof
CN211971821U (en) * 2020-01-09 2020-11-20 南京航空航天大学 Tap water ultrasonic dechlorination device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106477667A (en) * 2016-12-07 2017-03-08 南京航空航天大学 A kind of method and device for going chlorine residue in eliminating water based on ultrasound
CN108176574A (en) * 2017-12-19 2018-06-19 天津工业大学 A kind of more amplitude piezoelectric ultrasonic transducers of series composite structure double frequency
CN110589929A (en) * 2019-10-12 2019-12-20 周楚新 Self-powered omnibearing integrated ultrasonic algae removal device and working method thereof
CN211971821U (en) * 2020-01-09 2020-11-20 南京航空航天大学 Tap water ultrasonic dechlorination device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113775772A (en) * 2021-08-25 2021-12-10 南京航空航天大学 Aviation fuel metering and adjusting piezoelectric valve and working method thereof

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