Device and method for purifying and separating impurities in gas

Abstract

The invention provides a device and method for purifying and separating impurities in gas. The device comprises a main pipeline, a material storage tank, a spray nozzle, a material collection tank and a filter device; the main pipeline comprises an air inlet section, an impurity adsorption section, a material collection section and an exhaust section which are communicated sequentially; the bottom of the material storage tank is communicated with a liquid inlet end of the spray nozzle through a feed pipeline, a liquid outlet end of the spray nozzle is communicated with the pipe wall of the impurity adsorption section, the material collection tank is communicated with the material collection section, and the filter device used for filtering gas is arranged between the material collection section and the exhaust section. According to the device and method for purifying and separating impurities in gas, while pyroelectric material particles are taken as carriers and have a block effect in the air flow, the impurities are absorbed actively by the aid of the property of a static electric field produced by the pyroelectric material under temperature and pressure changes, the adsorption function is enhanced by the aid of a surface liquid layer, advantages of electrostatic adsorption and liquid adsorption are gathered, and particles and impurities are collected and recycled, so that the purposes for purifying and separating the impurities are realized.

Description

Technical field [0001] The invention relates to the field of gas purification, in particular to a device and method for purifying and separating impurities in gas. Background technique [0002] Air purification technology is divided into industrial waste gas purification technology and household air purification technology. [0003] At present, for industrial waste gas treatment at home and abroad, organic waste gas treatment methods mainly include physical, chemical, and biological methods, including treatment methods such as adsorption, direct combustion, catalytic combustion, chemical oxidation, and biological filters. At this stage, my country is currently targeting waste gas The treatment processes mainly include: isolation method, combustion method, absorption method, condensation method, plasma low-temperature catalytic oxidation method, electrostatic adsorption method, etc. [0004] For example, the mainstream technology of diesel exhaust purification is the use of diesel par...

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Problems solved by technology

[0007] Disadvantages: The initial investment cost is too high, which requires complex electronic control equipment and rare metal catalysts, which makes it difficult to reduce the cost, which increases the cost of diesel vehicles by 10,000 to 20,000. The research time for my country to enter this field is relatively short, and DPF is a mature technology Most of them are in the hands of foreign countries. At the same time, the rare metal catalyst used for PM regeneration in DPF will be poisoned by sulfur dioxide, resulting in a decrease in catalyst efficiency and a decrease in DPF purification efficiency. At present, the sulfur content of my diesel is too high, reaching 1000PPM, while foreign The sulfur content standard in diesel is only 50PPM

The root cause of the large-scale development of electrostatic dust collection technology lies in the control of ozone concentration. When the indoor ozone concentration reaches a certain proportion, it will bring harm to human health.

[0011] In addition, the single filtration efficiency of the best HEPA filter can reach 99%, but the electrostatic dust collection technology can only reach 70% at a time, and the electrostatic dust collection is

For example, in an area where the PM2.5 concentration reaches 300, the HEPA filter generally needs to be replaced every three months, but the dust collection net of the electrostatic dust collection technology product must be washed once a week, otherwise the pollutants staying on it will cause secondary pollution

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