The limestone gypsum wet flue gas desulfurization technology

The boiler flue gas absorber with lime slurry reaction for themselves. Under absorber of low pH is conducive to oxidation and dissolution of lime, on the pH of the higher absorption reaction is conducive to improve desulfurization efficiency.

Process characteristics :

Absorbent easy to get cheap, by-products in a higher value.

Absorber in a special plug nozzle difficult, long life

The use of special anti-corrosion materials technology, equipment life span of 20-30 years;

Unit capacity to adapt, high concentrations of SO2 smoke conditions

Spray with a unique layer, in accordance with the concentration of SO2 in the design, adapted to different parameters of working conditions, to achieve low operating costs to achieve a high desulfurization efficiency.

Semi-dry flue gas desulfurization CFB technology

Semi-dry flue gas desulfurization CFB is Ca (OH) 2 as a desulfurizer, boiler flue gas from the bottom into the CFB reactor, the reaction tower with serous for the desulfurization reaction, remove SO2 in the flue gas of gas and then bring some of flue gas desulfurizer particles (mostly desulfurizer satellites in response tablets into the cyclone tower cycle, gas-solid separation. Desulfurization by the pure gas from the top into the separator, ESP devices into the atmosphere, desulfurizer particle separator from down after the return leg expected to participate again reaction tower reaction complete desulfurizer particles from the bottom reaction Ministry to drain away.

Process characteristics :

A boiler fly ash materials for recycling, solid reactor uniform particle concentration, solid within a strong cycle, gas-solid mixing, good contacts, between gas and heat transfer, mass transfer is very satisfactory.

Within the reactor is injected into absorbent slurry, as a large volume of solid particles exist, serous attached to the surface of solid particles, resulting in gas-liquid two-phase response to the tremendous surface area.

Solid waste collection efficiency cyclone, and sent back reactor, desulfurizer recurring cycle of the reactor to stay within the extended time, thereby enhancing the utilization of desulfurizer and lower operating costs.

Through reactor for water, flue gas temperature to near water vapor pressures of the saturation temperature, increase desulfurization efficiency.

Semi-state desulfurization, less-product emissions, easier to handle.

Not reactor corrosion, no internal moving parts, wear small, maintaining a small amount of savings investment.

Ammonium FGD technology

Discharges from the boiler flue gas through the supercharger boost fan entered the FGD systems, in order to overcome the entire FGD system pressure drop.

On flue baffle system with a view to FGD system uptime or bypass operation.

Through the smoke blower boost after entering desulfurizer reaction zone, flue gas desulfurization upward through the tower, uniform distribution of desulfurizer the cross-section, from the desulfurization filler pipes and sprinkler installation of suspended droplets emitted to the decline in gas and ammonium sulfate slurry drops and packing on the surface of moist countercurrent contact occurred Mass Transfer with the absorption of reaction to the removal from flue gas SO2.
The flue gas desulfurization by the mist eliminator to remove flue gas entrainment droplets, from the top left desulfurizer, heated by steam heater, heating flue gas cleaner discharges from the chimneys.

Desulfurizer pool of ammonium sulfate pulp slurry pump cycle by cycle serous sent spray system and the seasoning of nozzles have a small surface area and large droplets of filler surface along the desulfurizer downward uniform cross-section.

SO2 and ammonium serous response generation Asian ammonium sulfate. In desulfurizer slurry pond leads to the generation of air-oxidation into ammonium sulfate ammonium sulfate. After evaporation and crystallization in byproduct of solid ammonium sulfate.

FGD systems to install a slurry tank ammonium sulfate, used for storage desulfurizer in decommissioning maintenance and / or repairs during desulfurizer the grout slurry ponds, and as foreign sales / evaporation and crystallization of the tank.

ABC as raw material to the reaction principle :

XNH4HCO3 SO2 + = (NH4) xH2 - xCO2 XSO3 + (1)

Asian ammonium sulfate for the oxidation reaction :

(NH4) for XH - XSO3 +1 / 2O2 + (2-x) = NH4HCO3 (NH4) 2SO4 + (2-x) CO2 (2)

Its distinctive features are :

No secondary waste, wastewater and air pollution.

SO2 recovery, production of ammonium sulfate, SO2 maximize the value of the recovery.

Ammonia - Fertilizer Act of exhaust ammonia content can ensure that less than 10ppm (7.5mg/Nm3), not Asian ammonium sulfate "aerosol" phenomenon.

Ammonia - Fertilizer Act of SO2 absorption tower high-efficiency, gas-liquid ratio to be more than 1,000, circulating pump flow and power consumption of small and oxidation low consumption, which is less than the total power consumption capacity of 1%.