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font size:  2016-8-23    views: 635    
although we do everything possible to avoid, machinery and equipment in short, oil spills occur. oil spill equipment including common machining equipment, engineering machinery, electrical equipment and other mechanical and electrical equipment. oil spill from the oil spill equipment lubrication and hydraulic system. oil spills can cause poor lubrication equipment, affect the performance of the equipment; oil spill will result in the waste oil, the impact of economic efficiency of enterprises, but also pollute the environment, seriously endanger human safety. no matter how much the volume of oil spills and what their size, leakage dripping on the factory floor would constitute a safety hazard, environmental hazard, hazardous contamination of raw materials, product quality visual pollution killer, workers and visitors. leakage also very likely to cause legal problems (osha, epa, fda, usda).
reason oil spill equipment produced roughly:
1, pipeline leak
hydraulic system is a mechanical system where the blood flow. the hydraulic pipes (steel, copper, rubber tubes, nylon tube and plastic tube) may weigh on mechanical blood vessels. since the hose has easy installation, to ensure that the requirements of relative movement between the connecting member and to absorb shock and vibration produced fluid flowing in a pipe, so that the hose has been widely used in engineering machinery hydraulic system. it is an important component rollers, excavators, loaders and other construction machinery hydraulic system. in operation, since the tube burst, cracking tube, pipe joints loose oil spills, improper selection of tube, improper installation, and other causes leakage of hydraulic piping, leaks are commonplace.
2, the design is unreasonable. usually manifested in: (1) is the choice of the form of the seal structure, with work pressure, pressure, temperature, media characteristics, environmental conditions incompatible; (2) is not pay attention to corrosion, vibration, pressure equalization, counseling and other measures just consider one-sided block, such as the design does not consider ventilation, oil return, catheter devices.
3, the device manufacturing process accuracy and surface roughness is not good. such as gear pumps, hydraulic valves, etc. are based on the amount of space to control the leak, if the manufacturing precision of the design does not meet the requirements, it will increase the amount of internal leakage, reducing the efficiency of oil or affect the accuracy of operation.
4, sealing element and improper selection of material, tend to make the sealing means short life, poor sealing performance, resulting in equipment prone to leaks.
5, poor quality of the equipment installed.
6, improper operation, maintenance equipment is not good is the direct cause of leakage, such as too much fuel, vent obstruction, packing gland is not pressed, to micro leaks in the joints when left untreated, damage to the sealing element does not change in time sealing ring with a blanket to put on dry impregnated not to use, not the timely replacement of failed packing, gaskets, that do not know are not familiar with the proper use of various seals, sealants, etc., will cause the device to leak.
so, how should you do? with absorbent material to control them and clean them!
there are many adsorbent material to choose from, when you choose, you may get lost. here to tell you the type of adsorbent materials, characteristics and properties, allowing you to select the right absorbent material to adapt to your situation.
first, the kind of the adsorbent material
1. what are the adsorbent material?
wherein the adsorbent can efficiently adsorb certain components from the gas or liquid. sometimes also called absorbers. but the absorption (absorption) and adsorption (adsorption) is not a concept. a substance is absorbed through the phase interface into the bulk phase behavior of another substance inside. refers to a substance is adsorbed on the surface of another adhering substance, not into the bulk phase. the difference is that the transfer process is accompanied by absorption, adsorption is the attachment surface, but this attachment may be a simple physical action (physical adsorption), or may be the surface of the adsorbent and adsorbate generates bond (chemisorption).
adsorbents generally have the following characteristics: a large surface area, suitable pore structure and surface structure, adsorbate has a strong adsorption capacity, generally do not react chemically with the adsorbate and the media, ease of manufacture, easy regeneration, good mechanical strength.
adsorbent is critical items deal with leakage. absorber for leakage process is usually divided into three categories:
the first is the absorption of an inorganic material, such as particulate soil, sand, silica, vermiculite, calcium silicate, silica gel, activated alumina, molecular sieves, natural clays and the like;
the second category is absorbed organic matter, such as rice husk, sawdust, cotton, rags, straw, corn cob fragments, coarse bran, wheat germ flour, defatted corn germ flour, cereal etc. absorbent;
the third category is synthetic absorbent such as adsorption meltblown polypropylene cotton, oil, cotton and chemical liquid-absorbent cotton.
since the absorption of inorganic or organic matter derived (or even local materials) to facilitate, together with cheap, currently used for leak handling the vast majority of such absorbent. however, with the clay treatment of oil spills, although easy to use, but the clay contains very harmful to the health of the material (by the us environmental protection agency epa and other organizations considered carcinogenic). these bulk liquid adsorbent material adsorbed easily spill adsorption capacity is up to 10 times its weight. liquid adsorption also has obvious selectivity, such as its good adsorption properties for metal cutting fluid and engine oil, antifreeze and tomato juice but adsorption and paint can not. in the adsorption process the same amount of oil, to consume more of clay, also produce more waste, the cost of disposal of waste also increased significantly. therefore, the clay is not a good deal with oil spills and oil spill sorbent.
in short, if we put the first two categories with absorbent synthetic absorbent to make a comparison, we can find some common disadvantages of organic or inorganic absorbent material, namely adsorption less (1 or 2 times its own weight), slow adsorption (in hours), messy, labor intensive cleaning, recycling is difficult and may damage the equipment, the chemical reaction can occur, the high cost of after-treatment, health threats (silicon-containing compound), the storage area of large, bulky, causing contamination of the finished product, and easily lead to secondary pollution in dealing with these absorbent work environment.
2, how to identify a good adsorbent material?
adsorption capacity, adsorption fast, versatile, safe, reliable, non-selective (or less selective, more generic), easy to use, stable quality, little waste, the total processing costs low, good chemical resistance adsorption adsorbent material is good material. high-performance, low-cost adsorbent material to handle complex oil and chemical spills, is very important.
second, the adsorption cotton, oil, cotton, cotton, chemical aspiration
1, and the role of adsorption cotton species
after the oil spill, the disposal of the spillage is the most commonly used items: universal absorption cotton, cotton only oil and liquid absorbent cotton (cotton chemical adsorption). cotton absorbent cotton, also known as adsorption, absorption cotton industry, sometimes people simply call it as absorbing cotton. the absorbent material properties are divided into: oil, cotton, chemical liquid-absorbent cotton (also known as chemical adsorption cotton, the absorbent cotton) and general purpose absorption cotton.
cotton can be controlled adsorption and adsorption of petroleum hydrocarbons, various types of acid (including hydrofluoric acid), basic dangerous chemicals, non-corrosive liquids and large-scale offshore oil spills and the like. this will keep the factories and workplaces clean and dry to prevent oil and chemical spill to drain and clean rivers and lakes, marine oil spills and chemical spills and the like.
absorbents after dehydration and de-oiled, only oil (oil type hydrogen, hydrocarbons), non-absorbent, professional suitable for absorbing petroleum hydrocarbons, hydrocarbons (such as oil, gasoline, oil, paint, etc.). when these products are used in the water because they do not absorb water, after adsorption saturation, then floating in the water. it can absorb 10 to 20 times its own weight of oil. usually white. available for processing machinery oil, drain oil, oil storage terminals and river oil, etc., to keep the working environment clean to prevent explosion caused by volatile oil and gas has a positive act.
chemical liquid absorbent cotton in the addition of a surfactant and then carry out dehydration, oil treatment, can be anti-acid and alkali and other chemical liquid, suitable for adsorption of acid, and other corrosive chemical liquid, oil chemistry, applications such as spill acid, corrosive and other hazardous liquids. usually yellow, pink or red. all chemical spills ships with a pipette cotton, especially acidic and corrosive hazardous chemicals including 98% sulfuric acid and 30% sodium hydroxide, but more liquid-absorbent cotton chemicals. after contact with the chemical irritant or corrosive liquids, polypropylene material decomposition will not occur, bright yellow, pink or red is still very eye-catching, to prevent misuse and misappropriation. the absorbent cotton can also absorb petroleum liquids and aqueous solutions.
universal adsorption cotton after dehydration and oil removal and addition of a surfactant, another on the basis of adding other fibers, the suction can be either water, can be applied to machinery maintenance, vehicle maintenance and water treatment plant floor . suitable for oil, water, coolants, solvents, pigments, dyes, and other unknown liquid. universal adsorption cotton normally gray.
2, adsorption properties and parameters of cotton
adsorption of cotton fiber is made of an inert polypropylene meltblown nonwoven fabric and a class of special treatment, a strong capillary absorption, the effective absorption of liquids and retain. adsorption products are wrapped in a line sewn by surfactant treatment agent or non-woven polypropylene fibers, the outer layer is extremely tough and durable fabrics. products by strangulation, after extrusion reusable, recyclable 72% -90% of the leaking liquid (depending on the manufacturing process and quality adsorption cotton).
such advantages are fire-retardant material, no dust, no storage time limit. soft, non-hierarchical, strong tensile, smooth front to do the processing, toughness, fiber less susceptible to friction or naturally fall off the field, will not damage the contact surface of the object; negative fluffy and soft, fibrous orderly, so that the fibers themselves aspiration and transfer speed absorption, adsorption multiple large, can absorb more than 10 times the liquid, solid molecular weight of the oil, the environmental impact of oil and prevent harm caused by molecular diffusion play a good effect, reducing hazardous substances leaked serious as a result of.
adsorption cotton meltblown polypropylene, stable, automatic ignition 441 ° c, melting point: 149-204 ° c. storage requirements is to stay away from damp, open flames and heaters. adsorption cotton has the following characteristics:
(1), the adsorption amount (10 or 25 times its own weight)
(2) adsorption fast (in minutes)
(3), can be suspended for industrial or marine use
(4), clean, light, fast
(5), reusable, save money
(6), is not prone to chemical reactions (chemical resistance)
(7), safety and environmental protection, non-combustion, does not rot or mildew
(8), high-temperature incineration ash are down 0.02%, after combustion releases heat per pound of product in 18000btu
(9), active programs, and fully guarantee the safety of staff and equipment
(10), a low overall cost, high-availability
3, absorption and use of cotton products in the form of
adsorption of cotton products are usually in the form of suction pads (adsorbing sheet), article adsorption (adsorption cable), volume adsorption, adsorption pillow, oil fence, oil stick, suction felt like.
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