A device for cleaning and purifying pollutants in gas

Abstract

The invention relates to a cleaning purification device for pollutants in gas, and belongs to the field of urban air environment protection; with utilization of the adsorption, dissolution and generated chemical reaction 'carrying' effect of a liquid on pollutants including particulate matters in the gas, the pollutants are captured and separated from the gas, so as to obtain the effects of pollution control and haze reduction. The device at least includes a gas pipeline and a liquid container and is characterized in that a content liquid in the liquid container can be sprayed out through a spray nozzle communicated with the liquid container to a gas flow passing through the gas pipeline, the liquid in a passage, which is sprayed out through the spray nozzle, can return to the liquid container, and the liquid returning to the liquid container can be sprayed out through the spray nozzle to the gas flow passing through the gas pipeline again. The cleaning purification device is simple in structure, low in construction cost, high in reliability, high in environmental adaptability, and flexible and diverse in implementation ways, and can be widely applied in inhibition of particulate matters in air of city indoor and outdoor public areas, governance optimization of motor vehicle exhaust gas and addition of air purification functions for public facilities.

Description

[0001] Field [0002] The invention belongs to the field of urban air environmental protection, in particular about utilizing the effect of liquid on the adsorption, dissolution and chemical reaction of pollutants in gas including particles, by combining liquid with indoor and outdoor air, or motor vehicle exhaust, It is a kind of cleaning and purification device for pollutants in the gas, such as stove oil fume, or tobacco smoke, etc., which contains particulate matter, and uses liquid to capture and separate pollutants including particulate matter from the gas to obtain the effect of pollution control and haze reduction. The structure is simple, the cost is low, the reliability is high, the environment adaptability is strong, and the implementation methods are flexible and diverse. It can be widely used in the suppression of particulate matter in the air in indoor and outdoor public areas of cities, the optimization of motor vehicle exhaust treatment, the purification of stove ...

AI Technical Summary

Problems solved by technology

[0007] However, the use of activated carbon and nano-filter paper to filter out particulate matter in the gas also has its limitations and disadvantages: First, in order to effectively filter fine particles, the pores of the filter element need to be extremely fine, and this will form a large air resistance, which constitutes a serious obstacle to the passage of airflow. Although continuous work can be maintained, activated carbon or filter paper is not suitable for occasions that require fast and large flow of gas purification

For example: used for air purification in urban outdoor open spaces, because it will appear slow and powerless; used for purification of motor vehicle exhaust particles, it will cause poor exhaust, which seriously restricts the power performance of motor vehicles

The second is that the filter element made of activated carbon and nano-filter paper has the "one-time" or "transient" that the accumulation of pollutants cannot be automatically removed and cannot be reused: the initial state filter element used for the first time has the best air permeability and filtering effect , with the attachment and accumulation of particulate pollutants, the ventilation pores or meshes will be blocked, causing the air permeability to gradually deteriorate, and the filtering ability to gradually attenuate and eventually lose, especially in occasions where the concentration of particulate pollutants is high. "Deterioration" and "attenuation" will be accelerated, so that the filter element made of activated carbon and nano-filter paper will soon end its life, and it is more difficult to clean up the particulate pollutants deposited in the pores of activated carbon or the mesh of nano-filter paper. It is more difficult to filter out particulate pollutants in the air. No matter whether gas or liquid is used as the medium for cleaning sediment, the cleaning effect will be negligible because it is extremely difficult for the cleaning medium to pass through the pores and meshes covered by the sediment layer. Usually, When the air permeability of the filter element becomes poor, or when the filtration capacity decays to a certain extent, the only way to completely replace the filter element

The air permeability and filtration capacity will deteriorate and attenuate with the increase of practical time, and the need to replace the filter element as a whole is the inherent limitation and disadvantage of using activated carbon and nano filter paper to purify gas

The third is that activated carbon and nano-filter paper that can filter out fine particles usually have the characteristics of complicated manufacturing process and high production cost. For the complete machine made, the filter element even accounts for about half of the total cost, and frequent replacement of filter elements becomes a problem. Unavoidable and must-bearable cost of use

The high initial purchase cost and high cost of use and maintenance make it difficult for air purification devices based on activated carbon and nano-filter paper to be popularized as soon as possible, and they can only be exclusive to wealthy groups.

The fourth is the air purification device based on activated carbon and nano-filter paper. It is difficult for ordinary users to intuitively understand and know the cleanliness and effectiveness of the filter element and the real-time status and effect of the air purification of the whole machine. After a practical period , Whether the filter element still has the function of filtering and purifying and how much filtering and purifying effect it has become difficult for ordinary users to define and clear doubts, no matter how "advanced", "advanced" and how "technical" the display instructions are set on the equipment Devices, which are all indirect detection and presentation, may be "distorted", and there is a possibility that unscrupulous manufacturers may use them to deceive and deceive ordinary consumers. If this happens, then the corresponding equipment and devices It is just a kind of psychological comfort for the user, but it does not really have the actual effect of purifying particulate matter in the air

Secondly, water or other liquids are used as the gas cleaning and purification medium, although as the liquid becomes "dirty" and becomes "muddy", and the "purification substances" contained in the liquid (referring to the dissolution and purification of harmful components and particles in the gas) / or the consumption of substances that chemically react with harmful components and particles), the purification strength and efficiency will be weakened to a certain extent, but as long as the physical adsorption on the surface of the liquid particles still exists, its purification effect on the particles in the gas will exist. Such "weakening" is much milder and slower than the "vicious cycle" and accelerated deterioration of air permeability deterioration and filtration capacity attenuation caused by particulate pollutants blocking air pores or meshes caused by activated carbon and nano-filter paper. Moreover, even if the purification ability of the liquid is weakened, it has no significant impact on the permeability of the gas pipeline; since the liquid cleans and purifies the pollutants in the gas through reciprocation, its purification ability can be improved by filling or replacing the liquid. The "dirty" water or other liquids are also easy to purify and then applied to gas cleaning and purification. If you don't want to be so troublesome, you can also directly use such "dirty" water or other liquids, such as using "dirty" water as Used as fertilizer to water trees and flowers, it can be seen that there is no problem of "disposable" or "transient" filter elements like activated carbon and nano-filter paper that are "scrapped" after use

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