A process for discharging high-temperature flue gas safely from an ocean platform includes discharging the gas from combustion facilities into a main body of a cooling and cleaning device through an exhaust pipe, while sea water is injected into the main body. The injected water passes through a water distributor located at an upper part, and the scrubbing sea water is sprayed downwards. The high-temperature flue gas enters into a lower part, and the gas is scrubbed by the sprayed sea water to be low-temperature clean flue gas. The low-temperature clean flue gas passes through the water distributor and a mist eliminator, and is discharged into atmosphere through an outlet at a top of the main body. The sea water is collected to a liquid pool located at a lower part of the main body and discharged into the ocean. A cooling and cleaning device is also disclosed.

A flue gas desulfurization (FGD) system in which a buffering additive feed directly adds a buffering additive containing acetic acid to either the FGD sump or a stream of the system that is downstream of the sump. In a method for performing flue gas desulfurization, the buffering additive, containing acetic acid, is added to either the sump or the overflow. That is, the buffering additive is added to the FGD system separately from the alkaline feed slurry, which contains lime or limestone.

Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.

A method for installing a spray pipe, including an insertion step of inserting a spray pipe from an opening portion, a positioning step of positioning the spray pipe such that an installation surface of a leg portion faces a supporting surface of a supporting portion, a provisional tightening step of provisionally tightening a first fastening portion to couple an attachment flange with the opening portion, an adjusting step of adjusting the height of the installation surface relative to the supporting surface such that an axis along which a pipe portion extends coincides with the horizontal plane, in the provisionally tightened state resulting from the provisional tightening step, a coupling step of coupling the leg portion to the supporting portion by means of a second fastening portion, after the adjusting step, and a final tightening step of performing a final tightening of the first fastening portion after the coupling step.

A flue gas desulfurization system that suppresses accumulation of solids on the bottom surface of the desulfurized flue gas inflow chamber of the system is provided. the system includes an absorber solution chamber so that the flue gas can be blown into the solution, a desulfurized flue gas inflow chamber for receiving the inflow of the desulfurized flue gas, a gas flow pipe penetrating between the absorber solution chamber and the desulfurized flue gas inflow chamber to allow the desulfurized flue gas to pass through the pipe, a cleansing solution feed pipe for feeding cleansing solution into the desulfurized flue gas inflow chamber, and at least one cleansing solution discharge pipe, discharging the fed cleansing solution from the desulfurized flue gas inflow chamber. The desulfurized flue gas inflow chamber has a bottom surface including a protrusion zone having a plurality of protrusions. Each protrusion has an inclined top surface.

A flue gas desulfurization system that suppresses accumulation of solids on the bottom surface of the desulfurized flue gas inflow chamber of the system is provided, the system includes an absorber solution chamber so that the flue gas can be blown into the solution, a desulfurized flue gas inflow chamber for receiving the inflow of the desulfurized flue gas, a gas flow pipe penetrating between the absorber solution chamber and the desulfurized flue gas inflow chamber to allow the desulfurized flue gas to pass through the pipe, a cleansing solution feed pipe for feeding cleansing solution into the desulfurized flue gas inflow chamber, and at least one cleansing solution discharge pipe, discharging the fed cleansing solution from the desulfurized flue gas inflow chamber. The desulfurized flue gas inflow chamber has a bottom surface including a protrusion zone having a plurality of protrusions. Each protrusion has an inclined top surface.

There are provided a downcomer pipe that can achieve suppression of accumulation of deposits in use and simplification of operation when being installed into a partition wall, an installation member and a desulfurization apparatus. The downcomer pipe comprises a pipe-shaped member and an installation member for installing the pipe-shaped member into the partition wall. The installation member includes a pipe-shaped part whose inner wall is to be brought into contact with the outer wall of the pipe-shaped member and a protruding part arranged on the outer wall of the pipe-shaped part, the pipe-shaped part and the protruding part constituting an integrated member.

Apparatus and methods for treating acid gas, which utilizes multi-stage absorption cycle of ammonia desulfurization to treat acid tail gas after pre-treatment of the acid gas, thereby achieving the purpose of efficient and low-cost treatment of acid tail gas. The parameters of the acid tail gas may be adjusted by a regulatory system such that the enthalpy value of the acid tail gas is in the range of 60-850 kJ/kg dry gas, for example, 80-680 kJ/kg dry gas or 100-450 kJ/kg dry gas, to meet the requirements of ammonia desulfurization, and achieve the synergy between the acid gas pre-treatment and ammonia desulfurization. Furthermore, hydrogen sulfide may be converted into sulfur/sulfuric acid plus ammonium sulfate at an adjustable ratio.

Flue gas generated when fuel is subjected to combustion by a combustor such as a boiler is supplied, and a sulfur oxide is reduced or removed from the supplied flue gas. A desulfurization apparatus 10A includes an absorber 11, a gas introduction unit 13a, an absorbent jetting unit 15, a plurality of water flow oxidation devices 20, an absorbent supplying unit 25, a demister 30, a gas discharging unit 13b, and a control device 40 that varies the number of water flow oxidation devices 20 that jet absorbent 14 and air 21 based on a rate of the sulfur compound in the absorbent 14 within an absorbent storage tank 11A.

A wet desulfurization apparatus includes a chamber enclosing a space for passing flue gas and including a first barrier partitioning the space into first and second chamber regions, a flue gas inlet to introduce raw flue gas into the first chamber region, and a flue gas outlet to discharge desulfurized flue gas from the second chamber region; a second barrier partitioning a slurry reservoir into a first reservoir part to store a first pH alkaline slurry and a second reservoir part to store a second pH alkaline slurry; a first sprayer to spray the alkaline slurry from the first reservoir part into the first chamber region to remove sulfur from the flue gas in the first chamber region; and a second sprayer to spray the alkaline slurry from the second reservoir part into the second chamber region to remove sulfur from the flue gas in the second chamber region.