CN110482645A - A kind of sewage treatment method - Google Patents

Abstract

The invention discloses a kind of sewage water treatment method, plasma electrical source is powered by high-field electrode of certain voltage, and the space between high-field electrode and grounding electrode forms electric field；High pressure gas in high pressure gas cylinder enters electric field space by gas flow control valve, forms plasma jet and sprays；Liquid to be treated in liquid storage pool sprays after liquid flow control valve, filter, flowmeter under the action of liquid atomiser in spraying form；Target purification object content in purified liquid is detected: if target purification object content is up to standard, keeping the supply voltage of gas flow control valve and high-field electrode constant；If it is not up to standard that target purifies object content, increase the aperture of gas flow control valve and the supply voltage of high-field electrode；Under the action of nonequilibrium plasma jet stream, it is atomized the targets such as virus, bacterium, microorganism contained in droplet particles in field purification object and is killed, complete purification process.

Description

A kind of sewage treatment method

technical field

The invention relates to a sewage treatment method, in particular to a sewage treatment method using non-equilibrium plasma technology.

Background technique

Compared with other existing water purification technologies, non-equilibrium plasma technology has the characteristics of high killing efficiency, low pathogen regeneration rate, and low cost of use. It is a new high-efficiency and clean water purification technology. It involves many disciplines such as chemistry, physics, electricity, environmental protection, biology, etc. It can keep the reaction system at a low temperature, save energy and equipment investment, and also enable electrons to have high enough energy to excite, ionize, and dissociate reactant molecules. So that bacteria, pollutants, algae, etc. are degraded. It has great application potential in different wastewater purification fields such as domestic sewage, medical wastewater, industrial wastewater, and ship ballast water.

However, parameters such as ionization space and properties of ionization medium have a great influence on the ionization effect of non-equilibrium plasma discharge. Factors such as too large ionization space and medium density will lead to a sharp deterioration of the ionization effect. When non-equilibrium plasma technology is used to treat domestic sewage, medical wastewater, industrial wastewater, ship ballast water and other wastewater, the liquid flow rate is too small due to the too small size of the ionization space (that is, the aperture of the liquid flow channel), which easily leads to an excessive purification rate. slow; moreover, because all the substances to be treated are in liquid phase, it is easy to cause non-equilibrium plasma discharge failure, resulting in purification failure; moreover, in the existing plasma water purification technology, the sewage flows through the plasma electrode space, which is bound to contact with the electrode. This will cause corrosion and failure of the electrodes.

Contents of the invention

Aiming at the problems in the prior art that the purification rate is too slow, non-equilibrium plasma discharge failure and electrode corrosion are easily caused, this application proposes a sewage treatment method.

In order to achieve the above purpose, the technical solution of the present application is: a sewage treatment method, comprising the following steps:

S1: The plasma power supply supplies power to the high-voltage electrode with a certain voltage, and forms an electric field in the space between the high-voltage electrode and the ground electrode;

S2: The valve opening electronic controller controls the opening of the gas flow control valve, and the high-pressure gas in the high-pressure gas cylinder enters the electric field space through the gas flow control valve to form a plasma jet and eject it;

S3: The valve opening electronic controller controls the opening of the liquid flow control valve, and the liquid to be treated in the liquid reservoir passes through the liquid flow control valve, filter, and flow meter and is sprayed out in the form of a spray under the action of the liquid atomizer. And all spray fields pass through the non-equilibrium plasma jet region;

S4: Detect the content of the target pollutant in the purified liquid: if the content of the target pollutant reaches the standard, keep the power supply voltage of the gas flow control valve and the high-voltage electrode unchanged; if the content of the target pollutant does not meet the standard, increase the gas flow Control the opening of the valve and the supply voltage of the high voltage electrode;

S5: Detect the content of the target pollutant in the purified liquid again; if the content of the target pollutant is still not up to the standard, repeat step S4; if it has reached the standard, complete the entire working process;

S6: Under the action of the non-equilibrium plasma jet, the target purification substances such as viruses, bacteria, and microorganisms contained in the droplet particles in the atomization field are killed, and the purification process is completed.

The above method is implemented in a sewage treatment device, and the device includes: a liquid atomizer, an unbalanced plasma jet actuator, a flow meter, a filter, a liquid flow control valve, a gas flow control valve, a liquid storage tank, a high pressure Gas cylinder, valve opening electronic controller, plasma power supply; the liquid atomizer is connected to the liquid storage tank through a flow meter, a filter, and a liquid flow control valve in sequence, and the liquid flow control valve is also connected to the valve opening One end of the electronic controller, the other end of the valve opening electronic controller is connected to the gas flow control valve, the gas flow control valve is located on the pipeline between the high-pressure gas cylinder and the unbalanced plasma jet actuator, the The unbalanced plasma jet exciter is connected with the plasma power source, and the injection area at the bottom of the liquid atomizer overlaps with the jet area at one side of the unbalanced plasma jet exciter.

Further, there are multiple unbalanced plasma jet actuators, all of which are connected to the plasma power supply.

Further, the liquid atomizer includes an atomizer body, the atomizer body is a hollow cylinder structure, and an atomization nozzle hole is arranged at the bottom of the hollow cylinder structure.

Further, the atomization spray hole is a circular straight hole structure or a cross circular straight hole structure or a cross slit structure.

Further, the unbalanced plasma jet exciter includes a high-voltage electrode, a ground electrode, and an exciter body, the high-voltage electrode is located in the exciter body, and a ground electrode is connected to the outer wall of the exciter body.

Further, the high-voltage electrode is cylindrical or strip-shaped, and its material is tungsten or copper or stainless steel.

Furthermore, the exciter body is made of polytetrafluoroethylene, glass, and ceramic insulating materials.

Furthermore, the liquid storage tank is a water tank structure, which is used to store the liquid to be purified.

Due to the adoption of the above technical solutions, the present invention can achieve the following technical effects: the non-equilibrium plasma jet technology can be used to inject the non-equilibrium plasma into the droplet particle atomization field. In this way, each droplet particle is surrounded by the non-equilibrium plasma jet, which greatly improves the purification efficiency. Since the length of the unbalanced plasma jet can be as long as 10cm, a large-sized atomization space can be used to greatly increase the liquid flow. The technical solution using liquid atomization technology and unbalanced plasma jet technology can not only greatly improve the purification efficiency, but also greatly increase the purification flow rate.

Description of drawings

Fig. 1 is a kind of sewage treatment device structural representation;

Fig. 2 is a schematic structural diagram of a liquid atomizer;

Fig. 3 is a schematic diagram of the working state of a sewage treatment device;

Fig. 4 is the structural representation of embodiment 1;

Description of serial numbers in the figure: 1 liquid atomizer, 2 unbalanced plasma jet actuator, 3 flow meter, 4 filter, 5 liquid flow control valve, 6 gas flow control valve, 7 liquid storage tank, 8 high-pressure gas cylinder, 9 Valve opening electronic controller, 10 plasma power supply, 11 atomizer body, 12 atomization nozzle hole, 21 high voltage electrode, 22 ground electrode, 23 exciter body.

Detailed ways

The technical solutions in the implementation of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It should be understood that the described examples are only some examples of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

This embodiment provides a sewage treatment device, including: a liquid atomizer, an unbalanced plasma jet actuator, a flow meter, a filter, a liquid flow control valve, a gas flow control valve, a liquid storage tank, a high-pressure gas cylinder, and a valve Opening electronic controller, plasma power supply; the liquid atomizer is connected to the liquid storage tank through a flow meter, a filter, and a liquid flow control valve in sequence, and the liquid flow control valve is also connected to the valve opening electronic controller One end, the other end of the valve opening electronic controller is connected to the gas flow control valve, the gas flow control valve is located on the pipeline between the high-pressure gas cylinder and the unbalanced plasma jet actuator, the unbalanced plasma The jet exciter is connected with the plasma power supply, and the injection area at the bottom of the liquid atomizer overlaps with the jet area at one side of the unbalanced plasma jet exciter.

Preferably, as shown in FIG. 4 , the number of unbalanced plasma jet actuators in this embodiment is three.

The liquid atomizer 1 includes an atomizer body 11 and an atomization nozzle hole 12, the atomizer body 11 is a hollow cylinder structure, and the atomization nozzle hole 12 can be a circular straight hole structure, a crossed circular straight Hole structure, cross seam structure and other different structures. Liquid atomizers include nebulizers and collision sleeves.

The unbalanced plasma jet exciter 2 includes a high-voltage electrode 21, a ground electrode 22, and an exciter body 23. The high-voltage electrode 21 can be in a cylindrical shape, a strip shape, etc., and its material can be tungsten, copper, stainless steel, etc. Different materials, the actuator body 23 is made of polytetrafluoroethylene, glass, ceramics and other insulating materials.

The flow meter 3 is used to control the flow of the liquid to be purified. The filter 4 is used to filter impurities in the liquid 4 to be purified. The liquid flow control valve 5 and the gas flow control valve 6 are respectively used to control the liquid to be purified and the high-pressure gas. The liquid storage tank 7 is a tank structure for storing the liquid to be purified. The high-pressure gas cylinder 8 is used to store high-pressure gas. The valve opening electronic controller 9 is used to control the opening of the liquid flow control valve 5 and the gas flow control valve 6 . The plasma power supply 10 is used to supply power to the unbalanced plasma jet actuator 2, and can be a power supply structure such as a DC power supply, an AC power supply, or a radio frequency power supply.

Preferably, the positions of the high voltage electrode 21 and the ground electrode 22 are interchangeable.

Liquid atomization technology can convert the continuous liquid phase into a mixture of discrete droplet particles and air; moreover, the spray hole structure with cross holes and cross slits can further reduce the droplet particle size and increase the droplet particle distribution scope.

Example 2

The present embodiment provides a sewage treatment method, comprising the steps of:

S1: The plasma power supply supplies power to the high-voltage electrode or the ground electrode with a certain voltage, and forms an electric field in the space between the high-voltage electrode and the ground electrode;

S2: The valve opening electronic controller controls the opening of the gas flow control valve, and the high-pressure gas in the high-pressure gas cylinder enters the electric field space through the gas flow control valve to form a plasma jet and eject it;

S3: The valve opening electronic controller controls the opening of the liquid flow control valve, and the liquid to be treated in the liquid reservoir passes through the liquid flow control valve, filter, and flow meter and is sprayed out in the form of a spray under the action of the liquid atomizer. And all spray fields pass through the non-equilibrium plasma jet region;

S4: Detect the content of the target pollutant in the purified liquid: if the content of the target pollutant reaches the standard, keep the power supply voltage of the gas flow control valve and the high-voltage electrode unchanged; if the content of the target pollutant does not meet the standard, increase the gas flow Control the opening of the valve and the supply voltage of the high voltage electrode;

S5: Detect the content of the target pollutant in the purified liquid again; if the content of the target pollutant is still not up to the standard, repeat step S4; if it has reached the standard, complete the entire working process;

S6: Under the action of the non-equilibrium plasma jet, the target purification substances such as viruses, bacteria, and microorganisms contained in the droplet particles in the atomization field are killed, and the purification process is completed.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the technical principles of the present invention. , these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (1)

1. a kind of sewage water treatment method, which comprises the steps of:

S1: plasma electrical source is powered by high-field electrode of certain voltage, the space shape between high-field electrode and grounding electrode At electric field；

S2: valve opening electronic controller controls gas flow control valve and opens, and the high pressure gas in high pressure gas cylinder passes through gas Flow control valve enters electric field space, forms plasma jet and sprays；

S3: valve opening electronic controller controls liquid flow control valve and opens, and the liquid to be treated in liquid storage pool passes through liquid It is sprayed after flow control valve, filter, flowmeter under the action of liquid atomiser in spraying form, and whole spray fields Pass through nonequilibrium plasma jet area；

S4: the target purification object content in purified liquid is detected: if target purification object content is up to standard, keeping gas The supply voltage of body flow control valve and high-field electrode is constant；If it is not up to standard that target purifies object content, increase gas flow control The aperture of valve processed and the supply voltage of high-field electrode；

S5: the target purification object content in purified liquid is detected again；If it is still below standard that target purifies object content, Repeat step S4；If up to standard, whole work process is completed；

S6: under the action of nonequilibrium plasma jet stream, virus contained in droplet particles in field, bacterium, micro- life are atomized The targets such as object purification object is killed, and completes purification process.