| 摘要 |
<p>#CMT# #/CMT# Plant (1) for paper production, comprises a paper mill at a location with an arrangement (2) for raw material pre-treatment and a paper machine (4), and a power station (6) for generating electrical energy for the paper mill. The power station is a type of power station, in which the fuel is converted by at least substantially pure oxygen under the formation of at least substantially pure carbon dioxide. Feeding device for supplying carbon dioxide produced in the power station to carbon dioxide consuming sub-processes in the paper mill is provided. #CMT# : #/CMT# An independent claim is also included for a method of operating the paper mill, in which the raw material is processed into paper by the paper mill containing an arrangement for raw material pre-treatment and a paper machine, comprising generating the electrical energy consumed in the paper mill in the power station by burning the fuel with oxygen and using the carbon dioxide produced in the power station during the combustion of the fuel with oxygen in carbon dioxide consuming sub-processes of the paper production. #CMT#USE : #/CMT# The plant is useful for producing paper and cardboard. #CMT#ADVANTAGE : #/CMT# The plant: reduces the pollutant emission e.g. problematic chemicals and carbon dioxide, than the conventional method; and utilizes reduced amount of energy resource and raw- and auxiliary materials. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows a schematic representation of the production and the use of various auxiliary materials in the plant for paper production (Drawing includes non-English language text). 1 : Plant for producing paper 2 : Arrangement for raw material pre-treatment 3 : Grinding device 4 : Paper machine 6 : Power station #CMT#INSTRUMENTATION AND TESTING : #/CMT# Preferred Components: The power station is of oxy-fuel- or pre-combustion-capture type. A device is provided at the location for generating the oxygen consumed in the power station. A device is arranged at the location for generating ozone from the oxygen produced in the device for oxygen-producing. The feeding device is useful for supplying a portion of oxygen produced in the device and/or ozone to oxygen-consuming sub-processes in the paper mill. A device for air decomposition, preferably a vacuum pressure swing adsorption system or a cryogenic air-separation unit is provided as a device for producing oxygen, where in the device in addition to oxygen at least nitrogen is produced. The feeding device is used for supplying the oxygen produced in the device for air decomposition to nitrogen-consuming sub-processes in the paper mill. The nitrogen produced in the device for air decomposition is fed into a grinding device (3) associated with the arrangement for the raw material pre-treatment. A wastewater treatment plant for cleaning the waste water found in the raw material pretreatment and in the paper production in the paper machine and a feeding device is provided for supplying oxygen produced in the device and/or ozone to the biological waste water treatment. A gas/steam turbine power plant is used as a power station. Preferred Process: The carbon dioxide consuming sub-processes are pH regulation, drainage acceleration of a fiber suspension, sticky reduction, hardness stabilization of the used water and/or the cleaning of bands, preferably in the area of drying zone, of the sticky adhesion by irradiation with dry ice particle, the production of calcium carbonate and/or the loading of fibers of the fiber suspension with calcium carbonate. The oxygen required for the combustion of the fuel is obtained in the device for air decomposition. A portion of oxygen produced in the device for air decomposition is used as rejuvenating agent for a biological purification stage of the waste water in the paper mill associated with sewage treatment plant, for production of ozone for the waste-bleaching, for biocidal ozone treatment of wastewater and/or for immediate use of oxygen as a bleaching agent. The nitrogen produced in the device for air decomposition is used for inerting and/or for treating fiber suspension, before grinding. Biogases are produced in a sewage treatment plant for cleaning of waste water, where the biogas is fed as fuel to the power station. Cryogenically generated air gases in the device for air decomposition are used as cooling media, preferably for cooling the purified wastewater prior its injection into the paper mill. The waste occurred in the paper production and/or the waste water for the control of microbiological activity is treated alternatively with carbon dioxide, nitrogen, oxygen and/or ozone.</p> |
