Continuous controlled process for removing sulphur oxides gases from stack gases

Patent · Tue Jul 15 04:00:00 EDT 1986

OSTI ID:5386883

Lin, P W

A process is described for effecting the continuous efficient desulphurization of gases containing sulphur oxides, comprising the steps of: passing a flow of flue gas containing sulphur oxides gases through heat exchanging means to change the temperature thereof, transmitting the heated flue gas through preheating means in order to further increase the temperature thereof, passing the further heated flue gas through catalytic converter means in order to convert the sulphur dioxide therein to sulphur trioxide and resulting in a sulphur trioxide rich flue gas, communicating the sulphur trioxide rich flue gas to the heat exchanging means in order to heat the incoming flue gas and cool the sulphur trioxide rich flue gas, transmitting the sulphur trioxide rich flue gas to a reactor and providing a calcium containing reactant to the reactor, withdrawing the reaction product of the reactant and sulphur oxides, quenching the reaction product to effect a porous core of unreacted reactant in an outer shell of cracked calcium sulphate, resupplying the quenched reaction product to the reactor for additional reaction with sulphur oxides within the core region of the reaction product, continuously emitting a desulphurized exit gas from the reactor to the heat exchanging means in order to effect the change in temperature of the incoming flue gas, and transmitting the desulphurized exit gas to an exit.

• Assignee: NOV; NOV-85-017720; EDB-86-145795
• Patent Number(s): US 4600570
• OSTI ID: 5386883
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CATALYTIC CONVERTERS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
CONTROL
DESULFURIZATION
ENERGY TRANSFER
EQUIPMENT
FLUE GAS
FLUID FLOW
GAS FLOW
GASEOUS WASTES
HEAT EXCHANGERS
HEAT TRANSFER
HEATING
MANAGEMENT
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
REMOVAL
STACK DISPOSAL
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFUR TRIOXIDE
TEMPERATURE CONTROL
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
YIELDS