Air-conveying type ultrasonic wave micron-grade dry fog dust suppression system and method

Abstract

The invention relates to an air-conveying type ultrasonic wave micron-grade dry fog dust suppression system and method. The system comprises a water quality filtering and softening device, a water storage tank, a dry fog dust suppression device and a local controller. An adjustable atomization plate in the dry fog dust suppression device scatters and atomizes a constant-temperature water source which is filtered and softened through the water quality filtering and softening device in the water storage tank, a large amount of micron-grade dry fog and negative ions are produced, a frequency conversion high pressure centrifugal fan in the dry fog dust suppression device blows the large amount of micron-grade dry fog and negative ions out of the dry fog dust suppression device, then the dust is adsorbed, condensed and precipitated, and therefore the purpose of dust removal is achieved. Millimeter-grade visible dust particles can be effectively treated, micrometer-grade inhalable dust particles can also be effectively treated, pollution of dust on the atmosphere is lowered, the work environment of on-site workers is improved, and occupational disease occurrence rate is lowered; the system is small in occupied area, safe and convenient to operate and high in practicability and is controlled in a full-automatic mode.

Description

technical field [0001] The invention relates to the field of dust suppression and purification devices, in particular to an air-driven ultrasonic micron-level dry fog dust suppression system and method. Background technique [0002] At present, there are more and more patients with pneumoconiosis in my country, and pneumoconiosis has become the first occupational disease, accounting for 76% of the total occupational diseases. The industries are coal, non-ferrous metals and building materials. Among them, coal-related industries accounted for more than 46%, and it increased year by year. It can be seen that the sanitary conditions of dusty workplaces have not been fundamentally improved, and dust is the direct cause of pneumoconiosis, so dust treatment is imminent. [0003] The main object of dust suppression treatment is dust particles below 150 μm, especially respirable dust particles with a diameter of below 10 μm. It is the main source of occupational diseases such as pn...

AI Technical Summary

Problems solved by technology

There are the following disadvantages: (1) The cloth bag has high water absorption, is easy to scale, is not antistatic, is not flame retardant, and has poor ventilation for long-term work, which affects the dust removal effect; (2) The dust collector produces secondary pollution during the dust removal process; (3) ) Unreasonable and unscientific cleaning of the dust collector will cause energy loss; (4) The equipment is easy to age, the maintenance cost is high, the maintenance workload is large, the service life is short, and the floor area is large; (5) When the pollution source is scattered Dust is difficult to collect, and when some characteristic dust (such as: coal dust) reaches a certain concentration, it will explode under the conditions of high temperature, open flame, electric spark, friction, and impact; (6) the dust gas must be considered when selecting filter materials Generally, the filter material is required to have the characteristics of wear resistance, corrosion resistance, low resistance, and long service life, which increases the manufacturing cost of the filter bag; (7) The nature of the filter material determines that the bag filter has limitations relative to dust ; 8) The control effect is poor. Although the emission value reaches the 50 mg / m3 allowed by the state, the control indicators of the pollution site are all below the 10 mg / m3 stipulated by the state.

There are the following disadvantages: (1) high primary investment and large steel consumption; (2) electrostatic precipitators usually require high manufacturing and installation precision, otherwise their normal and efficient operation cannot be guaranteed; (3) electrostatic precipitators are low due to the low wind speed However, it occupies a large area; (4) The electrostatic precipitator has certain requirements for the dust to be processed. For the dust outside the suitable range, corresponding measures must be taken to ensure the necessary dust removal performance.

There are the following disadvantages: (1) huge water consumption; (2) large calorific value loss of coal; (3) coal slime cleaning causes coal loss and increases the cost of coal slime treatment; (4) poor governance effect cannot reach the 10 mg / m3 standard

There are the following disadvantages: (1) large investment; (2) low dust collection rate; (3) horizontal pipes are easy to block, which affects the collection rate; (4) purification efficiency is low (usually 40% to 50%); ( 5) Large footprint

There are the following disadvantages: (1) the nozzle is easy to block; (2) the equipment failure rate is high and the maintenance cost is high; (3) for the dust of the moving equipment, the control effect of the dust point can only reach 30% to 40%; (4) Due to the blockage of the nozzle, the pipe joint is easy to burst; (5) The safety factor is low. Since the equipment uses a high-pressure pump to pressurize the water to 6MP-8MP, once the pipe bursts or breaks open, it will cause injury to the on-site staff and the on-site Unnecessary losses caused by equipment; (6) High requirements on the purity of water sources; (7) Filters are easy to block

There are the following disadvantages: (1) The power consumption is large, often tens of kilowatts, or even hundreds of kilowatts; (2) It occupies a large area and requires a special equipment room; (3) The equipment is relatively complicated and requires equipment transportation and high level of installation and maintenance management; (4) There is a certain selectivity to dust, and it is not possible to obtain high purification efficiency for all dust; (5) A large investment

[0011] Due to the above deficiencies, some thermal power plants, ports, steel plants, chemical plants, coal mines, coal conveying or material conveying system dust removal equipment are basically in a state of abandonment, and some power plants, ports, coal mines, etc. After replacing the dust removal equipment several times, Still not reaching the fundamental goal of dust control

Images