WATER NOZZLE FLUSH DISTRIBUTOR AND NOZZLE ORIENTATION IN A GASIFICATION PROCESS
Publication Date: 2013-Jun-06
The IP.com Prior Art Database
The present invention relates to a technique and/or a device, typically, a nozzle flush distributor to provide nozzle orientation in an IGCC plant. The invention utilizes high pressure process water sources for purifying all necessary nozzles such as vessel, pipe-line installations and pump seals which are used in black and grey water systems, or any other system where solids may be present and potential of the nozzle getting fouled or plugged. For example, recycled water, such as, process condensate, filter grey water, or grey water that has not been filtered, but whose particulate loading is very low is utilized for purification of nozzles thereby, reducing boiler feed water significantly and improving waste water treatment systems as well as the other accumulative process water inventories that must be disposed of on a continuous basis. Further, the water used for purification of the nozzles is recycled back into the black and grey water inventory working systems through a particular nozzle orientation.
The present invention relates generally to Integrated Gasification Combined Cycle (IGCC) plant, and more particularly to a technique and/or a device, typically, a nozzle flush distributor to provide adequate nozzle orientation in a gasification process.
Normally, in an Integrated Gasification Combined Cycle (IGCC) plant, purification of instrument nozzles, taps and pump seals around the sewage water, typically, black water system requires a once-through fresh water media. The equipment required for the purification utilizes a high pressure once through fresh water media, such as, boiler feed water (BFW). However, the instrument utilized for process monitoring and control and involving once through fresh water media failed to prevent the nozzles from getting plugged or fouled. Also, a very large and unaccounted for volumes of fresh water is used for purification of the nozzles. As a result, there is a severe impact on ability of downstream systems utilized to handle the sewage water, typically, black and grey water inventories. The downstream systems are blown down to include the grey water treatment systems. This occurs as the sizing and maximum capacities of downstream systems do not account for the excessive purification volumes of water that enters and exits the black and grey water systems. In each of the black and grey water system the monitoring and controlling instruments fail due to uncontrolled or poorly controlled flow rates/volumes of the once-through flush media entering these systems at each nozzle or tap.
Therefore, there is a need to implement an efficient disposal or short and long term water storage methods to haul excess water to remote disposal sites.
The technique of prevention of nozzle from getting fouled or plugged utilizes recycled water media to purify all required vessel nozzles, piping taps, and pump seals in the black and grey water systems. The recycled water media comprises process condensate, filter grey water, or grey water that has not been filtered, but whose particulate loading is very low. The recyclable water source is used in an IGCC plant and is in direct contact with raw syngas which are generated in the IGCC process at one or more contact locations. The preheating, flashing, stripping or pre-treatment with chemicals of any of the recycled water sources are possible when required to further ensure that the formation of precipitated deposits will not occur. In case of precipitation the amount precipitated is minimal such that the accumulated presence of the precipitate does not impact the reliability of the equipment involved for prevention of fouling of the nozzles. This ensures the utilization of all the recyclable water sources that are suitable for prevention of nozzle fouling within the IGCC plant. Also, there is a minimal impact on the downstream systems which is a waste wa...