An automatic early warning and elimination system and control method for water accumulation in dryer cylinder of paper machine
A technology of automatic warning and elimination system, applied in paper machine, paper making, textile and paper making, etc., can solve problems such as the pressure difference between the inlet and outlet of the dryer, and achieve the effect of solving water accumulation, improving drying efficiency and simple structure
Active Publication Date: 2016-08-24
保定雨森卫生用品有限公司
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Problems solved by technology
The fundamental reason why the accumulated water in the drying cylinder cannot be discharged normally is that the pressure difference between the inlet and outlet of the drying cylinder cannot meet the requirements
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[0037] The present invention is described in further detail below in conjunction with accompanying drawing:
[0038] see figure 1, an automatic early warning and elimination system for drying cylinder water of a paper machine, including a drying cylinder group 4 and a flash tank 3, the drying cylinder group 4 includes several drying cylinders connected in series, and the upper part of each drying cylinder is connected to a high-pressure steam branch pipe through a pipeline 20. There are pressure gauges and valves on the pipe connecting the upper part of each drying cylinder to the high-pressure steam branch pipe 20, and the pressure gauge is located at the lower part of the valve. The lower part of each drying cylinder is connected to the condensate main pipe 21 through pipelines. The lower part of each drying cylinder The pipes connected to the condensed water main pipe 21 are equipped with valves and steam traps, and the steam traps are located at the lower part of the valve...
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The invention discloses an automatic early-warning and elimination system for water accumulation in a drying cylinder of a paper machine, and a control method. The system is used for controlling a first steam exhaust valve and a second steam exhaust valve respectively, when an accrual pressure difference is lower than a set value, an early warning is given for the water accumulation in the drying cylinder and the first steam exhaust valve is opened through a pressure difference controller, and when the first steam exhaust valve is opened but the needed water drainage pressure difference still cannot be achieved, then the second steam exhaust valve is gradually opened in a segmentation manner until the pressure difference is kept at a value higher than a set value, and the early warning is eliminated; if the second steam exhaust valve is completely opened, the pressure difference is still kept out of a preset range, then the set value is an air supply pressure is increased by 10%; if the pressure difference is still less than the lower limit of the preset range, water drainage devices such as a siphon and a turbulent-flow bar for the drying cylinder are overhauled. The system is simple in structure, convenient to implement, and capable of effectively solving the problem of water accumulation in the drying cylinder, and improving the drying efficiency of the drying cylinder, the energy-saving efficiency and the paper quality through controlling the pressure difference between the inlet and the outlet of the drying cylinder.
Description
technical field [0001] The invention relates to a system for treating accumulated water in a dryer cylinder of a paper machine, in particular to an automatic early warning and elimination system and a control method for accumulated water in a dryer cylinder of a paper machine. Background technique [0002] In the drying section of a multi-dryer paper machine, the drying cylinders rely on the hot steam inside to provide heat, and the steam passing through the inside of the drying cylinders forms condensed water due to the release of heat. A large amount of condensed water accumulates inside the drying cylinder. If it is not discharged in time, it will cause water accumulation in the drying cylinder. Accumulated water will lead to drying efficiency of the drying system, energy saving efficiency, paper quality and even have an important impact on the efficiency of the entire paper machine. Therefore, efficient drainage of the drying cylinder is a necessary condition to ensure ...
Claims
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IPC IPC(8): D21F5/10
CPCD21F5/10
Inventor 汤伟于东伟张怡真王震
Owner 保定雨森卫生用品有限公司