Chemical laboratory purification equipment

1、 Overview
There are many types of indoor air pollutants in chemical laboratories, with complex compositions and intermittent emissions. The main air pollutants include organic gases and inorganic gases. Organic gases include carbon tetrachloride, methane, ether, ethanethiol, benzene, aldehydes, etc. Inorganic gases includeHCL、H2SO4Hydrogen sulfide, sulfur dioxide,HNO3Wait.
These gases are directly emitted into the atmosphere, exacerbating the formation of acid rain and posing a serious social hazard. Inhaling a large amount of them can cause direct harm to humans.
2、 Laboratory exhaust gas treatment methods
At present, the treatment methods for gaseous pollutants can generally be divided into two categories: wet and dry, and the specific selection of high-efficiency and low-cost methods needs to be based on the characteristics of chemical laboratory waste gas.
1Wet waste gas treatment
Wet waste gas treatment adopts acid mist purification tower for waste gas treatment, which is suitable for purifying hydrogen chloride gas（HCl）Hydrogen fluoride gas（HF）Ammonia gas（NH3）Sulfuric acid mist（H2SO4）Chromium acid mist（CrO3）Hydrogen cyanide gas（HCN）Hydrogen sulfide gas（H2S）Low concentrationNOxWater soluble gases such as waste gas are characterized by good purification effect, compact structure, small floor area, good corrosion resistance, anti-aging performance, convenient installation, transportation, maintenance and management, simple equipment structure, and low one-time investment, so they are widely used in the treatment of gaseous pollutants.
The acid mist purification tower is suitable for installation on the roofs of high-rise buildings. The working principle is that the acid mist exhaust gas is pressed into the purification tower by a centrifugal fan, passes through an atomization spray system and a filling absorption layer, and the exhaust gas and sodium hydroxide absorption neutralization liquid undergo gas-liquid two-phase absorption and neutralization reaction. After purification, the acid mist exhaust gas is discharged into the atmosphere. The purified acid mist exhaust gas can be lower than the national emission standard《GB16297-1996》.

2 Dry process exhaust gas treatment
Dry process exhaust gas treatment refers to the process of adsorbing a certain component or components of a gas mixture onto a porous solid surface by utilizing the unbalanced molecular gravity or chemical bonding forces present on the solid surface. Solid materials with adsorption properties are called adsorbents, and the advantages of this method are simple equipment, easy operation, and easy implementation of automatic control. However, due to the different physical and chemical properties of adsorbents, they have strong specificity. Therefore, in order to effectively purify gases containing different harmful substances, adsorbents with different chemical properties must be configured; If the time for the exhaust gas to pass through the adsorbent is short and the content of harmful substances in the exhaust gas is too high, the purification effect of the exhaust gas will not be ideal; When the exhaust gas passes through the adsorption medium, due to the obstruction effect of the solid medium on the airflow, it is necessary to increase the power of the fan to ensure the normal wind speed of the ventilation system. The adsorbent needs to be regularly replaced or regenerated to ensure the normal operation of the absorption device. So this method requires a certain amount of cost and manpower in practical applications. This method is generally used for the treatment of exhaust gases with relatively stable types and low content of harmful substances, which facilitates the use of a targeted adsorbent.
Dry exhaust gas treatment generally uses organic gas activated carbon adsorption devices. The principle is that activated carbon has many micropores and a large specific surface area. By relying on molecular gravity and capillary action, solvent vapor and volatile substances can be adsorbed on its surface. According to the boiling point of different substances, the adsorbed substances are precipitated by steam. When steam is used as the desorption medium, the precipitated organic solvent vapor condenses together with water vapor through the condenser and enters the separation tank for separation and recovery of the organic solvent.

IIIOrdering Instructions
1When selecting equipment, the exhaust volume of the required purification space must match the air volume processed by the equipment, otherwise it will not achieve the goal of air purification environment.
2To ensure the purification effect, make good use of the complete machine provided by our company.
3Our company can design and manufacture purification equipment with special requirements according to user needs.
4For the convenience of users, our company offers flexible product supply methods, including complete sets of accessories and parts.
5Our company's product equipment has a one-year warranty period. During the warranty period, if any damage occurs due to equipment reasons, our company is responsible for free repair.

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