Urea is also called carbonic acid, diamine, amide nitrogen, with a white or slightly yellow granular or crystal powder, 46% nitrogen, belongs to the efficient solid nitrogen fertilizer. Soluble in water, soluble in water of urea molecules can pass through a leaf is absorbed by crops.
After urea applied into the soil, into ammonium carbonate and ammonium bicarbonate is not very stable, easy to decompose the free ammonia volatilization losses. So when applying urea to deep overburden soil to prevent n losses. Urea is suitable for various soil and all kinds of crops, can be used as fertilizers and fertilizer, and generally do not do seed manure, to prevent burning.
The best for fertilizer is recommended. Urea as fertilizers, general dosage control under 80 kg per hectare, with p, k and trace element fertilizer mix mix well in banding. Urea as top dressing effect is better than the other nitrogen fertilizer. Because of urea is a neutral organic compound, on crop stem leaf didn't burn.
Spraying concentration: gramineous crops 1.5% 2%, 0.5% fruit and vegetable crops 0.4% 0.8%. Generally should be spray 2-3 times, spray once every 7 to 10 day, it is advisable to time in the morning and the evening.
Last week, the city health and family planning commission comprehensive supervision and law enforcement bureau of zhuhai city center tested 13 swimming pool, compared with the last time, is not up to standard in the test project, urea exceeds bid situation changed, two swimming pool urea slightly overweight, 1 pool bacteria in nearly four times. To detect unqualified unit, the municipal public health family planning comprehensive supervision and law enforcement bureau will give warning to rectification within a time limit.
Reporter discovery, two urea excessive amounts of swimming place, last week announced on the test results of urea are within the scope of the national standard, and the emergence of new standard swimming place, two urea are slightly overweight. In addition, the jingzhou city Olympic stadium (pool) bacteria, a total of 4800 / mL, compared with the standard (1000 / mL) or less, and nearly four times.
For urea production standard strictly, is actually made up 32.5% and 67.5% of high purity urea of deionized water, some enterprises in order to reduce the production cost, use common water instead of deionized water, but this vehicle urea cannot meet the requirements of the production, belongs to the unqualified products. With the deionized water in the production of urea solution will cause excessive content of impurities, pipeline and spray nozzle jam filter, urea solution, atomization effect, reduce the SCR system impurities even might damage the urea pump too much. And urea pump price is not cheap, the price is close to ten thousand yuan, do more harm than good.
Urea nozzle is located in the exhaust pipe, the high temperature environment for a long time, and when it works it is through the cycle of urea solution for cooling, if not the cooling effect of the urea solution, urea nozzle are prone to damage.
Three: after the damage processor easy to oxidation
The four vehicles using OBD diagnostic system, check whether the nox emission of the exhaust gas overrun, have the effect of excess emissions vehicle limited power. If cut off OBD, don't add urea solution, after the processor does not work easily by oxidation.
Damage to 4: environmental pollution
If four engine SCR system doesn't work for a long time, countries in order to reduce the PM emissions calibration bias combustion fully, can also cause n2o emissions rise, caused great impact on the environment.
In short, the use of unqualified urea solution and two kinds of practices, cut off OBD diagnostic signal leads to urea, urea pump nozzle, catalyst, such as post-processing system of irreversible damage, and increases the nitrogen oxide emissions. Not only can let the user loss of nearly ten thousand yuan of post-processing equipment will also bring great influence on the environment, finally actually do more harm than good. So, small make up advise which owners covet petty gain, don't be penny wise and pound foolish, should choose the proper vehicle urea solution.
Urea fertilizer manufacturer, Urea supplier, China Ammonium Nitrate factory – Jin
Coal Sun Stone
Jin Coal Sun Stone is a group company,also is the largest and professional
manufacturer and supplier of Urea fertilizer, Urea and Ammonium Nitrate in China.
Urea fertilizer, Urea, Ammonium Nitrate, China, manufacturer, supplier, Wholesale
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