Operating cost of ammonia desulfurization:
Taking the sulfur content of 75t boiler coal as an example, the operation cost is briefly calculated.
Annual operating cost of equipment
Description of project quantity and price (ten thousand yuan)
The ammonia consumption is 2009 tons -3 14.53 1700 yuan/ton.
The water consumption is 10500 tons -2.47 2.35 yuan/ton.
Electricity consumption is 630,000 kWh -20.48 0.325 Yuan/kWh.
The labor cost is 3-39.26 million yuan/population year.
The price of ammonium sulfate is 7799.6 tons +546 700 yuan/ton.
Total -+204.62-
In fact, the amount of sewage charges paid less because of SO2 emission reduction is also quite large, which is not counted here. If the operation is reasonable, ammonia desulfurization will bring economic benefits to enterprises, and at least the investment cost can be recovered in a short time.
Practical application of ammonia desulfurization;
There is a ready-made synthetic ammonia plant near a power plant, and the sulfur content of coal in the power plant is also high (high-sulfur coal is cheap, but SO2 pollution is more serious, and the investment in equipment using limestone method is also greatly increased, while ammonia method can produce more ammonium sulfate, with more obvious economic benefits. For example, a 350MW power plant in Dakota, USA, used ammonia method in 1996 because it used high sulfur coal. Another larger power plant, with desulfurization efficiency of 95%, produces 654.38+10,000 tons of ammonium sulfate every year. Therefore, under certain conditions, it is profitable to use ammonia for desulfurization.
Advantages of ammonia desulfurization:
Its desulfurization efficiency is high, which can reach more than 95%.
Because the reaction speed of ammonia water and SO2 is much faster than that of limestone (or lime) and SO2, and the ammonia method does not need an absorbent recovery system, the system is smaller, simpler and more reliable than limestone-gypsum method, and its investment cost is lower than that of limestone-gypsum method, and it occupies a small area. Limestone is used as desulfurizer in the process, and there is no common scaling and plugging phenomenon.
Terminators after desulfurization are (NH4)2SO3 and (NH4)2SO4 (a small amount) and a part of (NH4)HSO3 solution, which are also absorbents for absorbing nitrogen oxides. Therefore, ammonia method also has the function of denitrification.
It has certain dust removal function.
Ammonia desulfurization has no industrial wastewater discharge and basically no waste residue discharge except ammonium sulfate, which avoids the occurrence of secondary pollution and saves a lot of storage space. It can also produce chemical fertilizer, which has certain economic benefits.
Because the absorbed sulfur and nitrogen compounds are harmful gases, and the ammonia water that absorbs sulfur is also industrial waste, the purpose of "treating waste with waste" can be achieved.
In the chemical reaction of desulfurization, the input of ammonia water is far less than that of lime in limestone method, so the transportation cost is reduced and the cost is saved.
High reliability-the utilization rate is over 99%, and there is little downtime due to failure.
Longer service life-25 years of normal use under good maintenance conditions.
Advantages of Kyle ammonia desulfurization:
In addition to all the above advantages, Kyle's ammonia desulfurization is also outstanding in the following aspects:
Ammonia desulfurization based on automatic control.
Ammonia desulfurization based on automatic monitoring can rely on the advantages of the company's instruments to monitor residual ammonia, waste gas components and desulfurization monitoring.
Design emergency protection measures for ammonia leakage.