摘要:
The present invention relates to an arrangement for and a method of manufacturing a fibrous web, i.e. paper or board. The present invention relates specifically to so-called foam formation of a fibrous web. A further feature of the present invention is to produce foamed furnish by injecting gas into the furnish by means of an injection mixer.
摘要:
The present invention relates to a method and an arrangement for proportioning thick stock to a short circulation of a fiber web machine. Specifically, the method and the arrangement of the invention relate to treating and proportioning thick stock components of paper making stock having a consistency of the order of 2-12%, preferably 2-5%, for instance into white water one component after another alone or together with an additive.
摘要:
The present invention relates to a method and apparatus for feeding chemicals into a process liquid flow. The object of a preferred embodiment of the method and the apparatus of the present invention is feeding retention /chemical together with an additive, which may be another chemical or for example a mineral, to paper suspension flow to be fed to a paper machine. The method and the apparatus of the invention are particularly well applicable in feeding an additive of the paper manufacture, such as a filler, together with a retention chemical to paper pulp essentially simultaneously.
摘要:
The present invention relates to a method of producing precipitated calcium carbonate (PCC) where a retention/strength enhancing chemical is added to milk of lime to form a mixture thereof prior to adding the mixture of the retention/strength enhancing chemical and milk of lime to paper making stock in a pipeline leading to a headbox of a paper making machine, whereafter carbon dioxide is introduced to the paper making stock, and the carbonation reaction between milk of lime and carbon dioxide is allowed to proceed in the presence of both fibers and the retention/strength enhancing chemical.
摘要:
The present invention relates to a method of producing precipitated calcium carbonate (PCC) where a retention/strength enhancing chemical is added to milk of lime to form a mixture thereof prior to adding the mixture of the retention/strength enhancing chemical and milk of lime to paper making stock in a pipeline leading to a headbox of a paper making machine, whereafter carbon dioxide is introduced to the paper making stock, and the carbonation reaction between milk of lime and carbon dioxide is allowed to proceed in the presence of both fibers and the retention/strength enhancing chemical.