As we all know, the main source of air pollution is industrial emissions, industrial exhaust treatment has become the top priority of air pollution control. Many enterprises have joined the waste gas treatment industry, spray tower as a new type of spray absorption equipment has been lost in the waste gas pollution in general use, spray tower main mode of operation is acid alkali waste gas the duct into the purification tower, through the packing layer, the waste gas sodium hydroxide absorbing liquid gas-liquid two-phase full contact absorption neutralization reaction, the acid waste gas after purification, then by the dehumidification plate dewatering demisting by the fan discharged into the Atmosphere. The absorbing liquid is pressurized by pump at the bottom of the tower sprayed down at the top of the tower, finally flows back to the bottom of the tower for recycling. The purified acid mist exhaust gas meets the emission requirements of local emission standards is lower than the national emission standards. Ding Sheng environmental protection independent research development production of PP spray tower, widely used in industrial acid alkali waste gas treatment, this article is mainly about the spray tower for acid alkali waste gas treatment effect characteristics.

First, the effect characteristics of spray tower for acid alkali waste gas treatment

Shower tower packing layer as a gas-liquid two-phase direct contact components of the mass transfer equipment. The bottom of the packing tower is equipped with filler support plate, filler in a chaotic way placed on the support plate. Packing above the device packing pressure plate, in order to prevent the rising airflow blowing. Shower tower spray liquid the top of the tower through the liquid disperser sprayed on the filler, along the filler appearance flow down. Gas the bottom of the tower into the gas dispersal installation spread, the liquid was countercurrent continuation of the gap through the packing layer, in the packing appearance, the gas-liquid two-phase intimate contact to stop mass transfer. When the liquid along the packing layer downward activity, sometimes present wall flow phenomenon, wall flow effect form gas-liquid two-phase in the packing layer dispersion is uniform, so that the mass transfer efficiency decreased. Therefore, the packing layer in the spray tower is divided into two sections, set up at both ends of the re-dispersal installation, after re-dispersal of the spray to the upper layer of filler.

Shower tower as a new type of spray absorption equipment has been lost in the exhaust gas pollution in general use. It will carry out the concept of sulfide bed to the vapor-liquid mass transfer equipment, so that the filler in the spray tower is in the fluidized form, so that the mass transfer process can be lost to strengthen.

Spray tower is characterized by: high gas velocity, large disposal capacity, light weight tower, vapor-liquid dispersion is relatively average, easy to be solid viscous material obstruction. Especially because of the tower turbulence is intense, so the quality energy transfer can be strengthened, so you can reduce the tower diameter, reduce the tower height. The tower disposal air volume is large, empty tower gas velocity 1.5 ~ 6.0m / s, spray density of 20 ~ 110m3 / (m2 - h), pressure loss of 1,500 ~ 3,800Pa, spray tower mist removal installations using cyclone plate mist eliminator, through the gas through the tower plate rotary movement, the application of centripetal force will be removed the fog droplets, the mist removal efficiency of up to 98% -99%, the structure of the complex pressure drop Smaller.

Shower tower on a variety of corrosive gas pollution disposal effect is clear, can be effective in removing hydrogen chloride gas (HCl), hydrogen fluoride gas (HF), ammonia (NH3), liu acid fog (H2SO4), chromic acid fog (CrO3), hydrochloric acid gas (HCN), alkali vapor (NaOH), formalin (HCHO) other water-soluble gases. Spray tower pollution efficiency, operation management complexity, long service life. The acid alkali waste gas emission after pollution disposal reaches the national emission standard. The spray tower equipment is divided into single tower body double tower body. Adopting round tower, with flange segmented connection become. Detailed by the liquid storage tank, tower, air inlet section, spray layer, packing layer, cyclone mist layer, view inspection window, air outlet other components.

Scope of application of spray tower: oil refineries, rubber factories, leather factories, printing factories, chemical plants, Chinese western yao factory, metal foundry, plastic recycling plant, spraying solvents, food processing plants, meat processing plants, slaughterhouses, poultry feed farms, paper mills, sewage treatment plants, residue transfer stations other inorganic inorganic waste gas pollution disposal.

Second, the use of spray tower precautions

1, the regulation of circulating water: the water supply pump the spray tower to decide, when running a boiler can open a boiler, when two three simultaneous operation in winter, the two pumps will be all open, slurry pumps its flow should be adjusted according to the flow of the circulation pump, so that it can be equal.

2, the amount of dosing in the shower tower dosing pool: when running a boiler, add 2 bags of alkali, add 5 bags of quicklime, such as winter operation of two three, according to the corresponding multiplier to increase the amount of drugs.

3, the spray tower sedimentation tank should be cleaned frequently, one week in summer, three days in winter.

4, gray water separator sewage, discharge once per shift, to open the sewage valve, until there is clear water discharged.

5, the above rotating parts should be frequently checked, oiling, found faults should be promptly eliminated to ensure the effect of desulfurization spray tower.

6, in the upper lower staircase dosing should pay attention to safety, to have independent security, mutual security consciousness.

7, the work is completed in a timely manner to clean up the health, so that people away the site clear.