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             Wuxi New Sanzhou Special Steel Co., Ltd. (hereinafter referred to as "New Sanzhou Special Steel") used the magnesium desulfurization process of a company before the 90t/d gas boiler. In order to actively respond to the policy requirements of the Ministry of Environmental Protection for ultra-low emissions, the former magnesium desulfurization process has been unable to achieve the effect of ultra-low emissions. After several investigations and screening, it is known that the project cycle of ultra-carbon in medium crystalline environment is short and has no value. Conservative, low cost, stable operation, no solid waste and secondary pollution, etc. Finally, medium-crystalline supercarbon was selected as the treatment process of 90 t/d gas-fired boiler.

customer demand

The new carbon technology of the medium crystal environment can meet the policy demand of ultra-low emission, and has the characteristics of short project cycle, unattended, low cost and stable operation, no solid waste and two pollution.



 Technological Principle

 Process Realization Path

The original flue gas enters each fixed bed absorption tower unit through the flue, and fully contacts the absorbent from bottom to top. Fixed bed absorber is filled with fixed bed absorbent developed by our company. When the material in the bed is filled, there are small irregular voids between the absorbent particles, which make the flue gas flow into the maximum baffle diffusion, so that each absorbent particle can fully contact and react with the flue gas; while desulfurization and denitrification reaction, flue gas is continuously dispersed into small voids, resulting in poor fluidity. The dust is intercepted and left in the bed to achieve the purpose of dust removal.

Because of the earliest contact with flue gas at the bottom of the bed and the highest concentration of SO2, NOX and dust in the flue gas contacted with it, the material at the bottom of the bed absorbs and saturates the fastest. When changing the material, it moves from top to bottom depending on the gravity of the material itself, and the saturated material at the bottom is discharged first to ensure the efficient utilization of the material.            

Supercarbon (CTDD) process, using industrial solid waste and sludge as raw materials, uses patented technology to make super-carbon materials, which can be used to replace activated carbon desulfurization and denitrification agents commonly used in the industry at present, realizes "treating waste with waste, turning waste into treasure", and develops "super" process to replace activated carbon movable bed and fixed bed on the basis of "super-carbon material". Carbon flue gas treatment technology (CTDD technology), to overcome the current market activated carbon technology security is poor, high operating costs, denitrification needs ammonia spraying key defects, so that flue gas treatment embarks on a green, efficient, low-cost economic cycle.

 Process flow chart

Operational status

 Stability and Synchronization Rate

Since it was put into operation in March, 2019, the system runs steadily, and the index is better than the content of the technical agreement. It can achieve 100% synchronous operation rate with the host computer, thus reducing the loss of shutdown caused by the system.

 Emission Indicators




Entry data(mg/Nm³



Export data(mg/Nm³




Project highlights

 Low investment and operation cost, short construction period, no waste water and solid waste discharge, no white plume, fully automated operation, stable realization of ultra-low target

1. The cost of investment and operation is low, which is 40-50% lower than that of activated coke activated carbon process.            

2. The project duration is short. The project duration is 70 natural days (including Spring Festival). After modular production of super-carbon material warehouse, the whole project duration can be further shortened to 30 natural days.            

3. The process basically does not need to consume water and does not produce waste water.            

4. Solid waste produced by the process can be used as raw materials for building materials, and there is no secondary pollution problem of solid waste.            

5. There is no white plume and the exhaust temperature is higher than 120 C. On the basis of avoiding chimney corrosion, the low-altitude exhaust of white smoke is also effectively avoided.

 The First Unmanned Thermoelectric Boiler in the World to Realize Ultra-Low Emission


Supercarbon technology has the advantages of simple process, automatic process control and simple maintenance. It has also become the first set of unattended thermoelectric boilers in the world to achieve ultra-low emission.

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