Introduction: Over the years, more and more units have used the dust-proof sheds to construct subways. With the continuous advancement of environmental protection supervision and management in Beijing, the qualified standard for the construction of Beijing subway construction dust can be described as high sesame blossom. Recently, the Beijing Municipal Housing Construction Committee jointly issued a "Notice on Promoting the Implementation of the Dust-proof and Sheltering Shelter for Open Pit Excavation of Rail Transit" jointly with related departments. The "Notice" requires that, as of May 1, 2018, a dust-proof isolation shed be applied to open pit excavation in rail transit projects. This move means that the Beijing subway construction site will bid farewell to the traditional open-air construction methods. There is no doubt that higher standards and stricter requirements have been put forward for the construction of the Beijing subway. The "Notice" clarified the specific work goal is to set up a three-dimensional dust suppression and dust removal equipment facility in the dust isolation shed, and the dust reduction rate (the ratio of the average concentration of dust pollutants outside the shed and the shed) at the construction site meets the eligibility criteria. In order to achieve the construction operating environment in line with occupational health standards.
Potassium Chloride is a common potash fertilizer. It can improve crops ability of drought resistance, cold resistance, lodging resistance,and pest disease resistance. It can also promote flowering and fruiting, and better use of nitrogen to increase protein content, and promote the production of sugar and starch.
Potassium Chloride
Appearance
White or red Powder/crystal/granular
Total nutrient
98% min
K
60% min
Purity
95% min
Moisture
1% max
1. Not suitable for use in saline or alkaline lands and crops such as sugarcane, peach,grape,etc.
2. Chlorine-like crops: onion, spinach, celery, and cabbage
3. Chlorine-resistant crops: rice, wheat, barley, corn
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However, when it comes to construction site dust reduction, it has to mention spray dust system. The spray dust-removing dust system absorbs dust particles by spraying water mist so as to increase its weight and settle. It can perform three-dimensional automatic dust reduction and dust suppression in a limited construction work area. Due to the adoption of wet dust-removing means, it can be supplemented with air-feeding dust collection equipment to prevent secondary pollution of dust.
According to the specific requirements of construction dust reduction, the spray dust reduction system can selectively select high-pressure spray systems, low-pressure spray systems, long-distance spray gun systems, and moving dust cannons.
The spray dust-reduction system consists of main control system, pump station unit, nozzles, pipe fittings and other components. According to the construction site environment layout planning, easy disassembly and maintenance, is a more economical way of construction site dust reduction.
It can be foreseen that with the inclination of environmental protection policies and the improvement of construction standards, the future development prospect of spray dust-reduction systems is still very broad.
kcl use: