Control of an expanded drying section of a paper machine

A drying part, paper machine technology, applied in the direction of paper machine, dryer part, paper making, etc., can solve the problems affecting production cost and so on

Active Publication Date: 2012-02-01
西门子能源全球两合公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Especially in the drying section of a paper machine a lot of energy is required for drying the paper web, improving the energy efficiency of the drying section can have a significant impact on the overall production costs

Method used

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  • Control of an expanded drying section of a paper machine
  • Control of an expanded drying section of a paper machine
  • Control of an expanded drying section of a paper machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0077] figure 1 A simplified schematic diagram of a paper machine 1 is shown, the illustration being limited to the plant components that are relevant to the invention. This is firstly the drying section 2 , which has a pre-drying section 3 , a post-drying section 4 and a size press 5 , the effect of the wet press 6 on the drying of the paper web 13 also being simulated together. Furthermore, the heat recovery system 7 and the evaporation and condensation system 8 also belong to the drying section 2 . All plant components can have a plurality of sensors 9 for receiving different measured values ​​(for example parameters calculated in the method according to the invention), of which only one sensor 9 in the heat recovery system 7 is shown in the drawing. The sensor 9 supplies measured values ​​to a controller 14 of the paper machine 1, which has suitable means 12, such as input and output means, working memories, processors, etc., for carrying out the method according to the i...

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PUM

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Abstract

The invention relates to a method and to a model-based controller for controlling at least one part of a paper machine, to a paper machine having such a controller, to a computer program for executing the method according to the invention, and to a computer program product on which the computer program according to the invention is stored.; In order to achieve an improved or optimized operation mode of an "expanded drying section" of a paper machine - comprising the "actual" drying section, separated, if applicable, into pre-drying and post-drying sections with a size press located therebetween, a steam and condensate system, an exhaust air heat recovery system, a wet press and the white water - a model that includes the above system components is proposed, with which mass and energy balances for the system components as well as the specific energy consumption of the drying section are calculated, based on values for parameters relevant for the drying process.

Description

technical field [0001] The invention relates to a method for controlling at least a part of a paper machine and a model-supported controller, a paper machine with such a controller, a computer program for carrying out the method according to the invention and a computer program product, in which the computer program A computer program according to the invention is stored on a product. Background technique [0002] Especially in the dryer section of a paper machine a lot of energy is required for drying the web, and improving the energy efficiency of the dryer section can have a significant impact on the overall production costs. Sometimes the drying part is also a "bottleneck" in terms of equipment productivity, that is, productivity can be increased by improving drying. [0003] In order to save energy it is known to use intelligent controllers such as the "Dryer Management System" from Kadant Johnson, which simulates the drying in the actual drying section of the paper ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F5/00D21F5/20D21G9/00
CPCD21F5/20D21F5/00D21G9/0036Y02P70/10Y02P80/15
Inventor J.赖因施克E.弗里斯A.西贝尔F.斯佩特
Owner 西门子能源全球两合公司
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