Method and device for evenly distributing fluid medium

Abstract

The invention discloses a method for evenly distributing fluid media. The media pass through a liquid inlet unit and a speed-increase turbulent flow unit which are arranged longitudinally, the media firstly increase speed and then flow in a turbulent flow state in the speed-increase turbulent flow unit, and then, the media overflow a transverse distribution unit and are evenly distributed and smoothly flow before entering a dewatering cattier to realize the method for evenly distributing fluid media. The invention also discloses a device for evenly distributing the fluid media, which comprises the liquid inlet unit, the speed-increase turbulent flow unit and the transverse distribution unit, wherein the outlet of the transverse distribution unit is connected with a flow channel which extends to the inlet of the dewatering cattier, the invention can effectively prevent the turbulent collection of sizing materials to ensure that the sizing materials can be evenly distributed. When pass through a discharging channel, the sizing materials are evenly distributed and smoothly flow, thus the sizing materials can be cleanly and evenly washed, the dosage of washing liquid in a subsequent washing technical process can be reduced, and consequently, the production cost is reduced.

Description

technical field [0001] The invention relates to a method and a device for uniformly distributing a fluid medium, belonging to the field of chemical industry. Background technique [0002] In the process of pulp filtration, washing and concentration, the purpose is to use the least amount of washing liquid to achieve the maximum amount of undissolved solids in the cooking liquid (including lignin and cooking chemicals) in the pulp. After the cooking and washing process, the insoluble solids remaining in the pulp will have adverse effects on subsequent processes such as bleaching and papermaking. At the same time, the loss of black liquor and a large amount of mixed solids in the pulp will mean the reduction of the heat recovery rate and chemical recovery rate of the alkali recovery system. If the washing water is used without restriction, the pulp can be washed very clean in theory, but it is not economical enough for a factory. In order to reduce the amount of washing liqu...

AI Technical Summary

Problems solved by technology

After the cooking and washing process, the insoluble solids remaining in the pulp will adversely affect the subsequent processes such as bleaching and papermaking

At the same time, the loss of black liquor and a large amount of solids in the pulp will mean the reduction of the heat recovery rate and chemical recovery rate of the alkali recovery system.

If the washing water is used without restriction, the pulp can be washed theoretically very clean, but it is not economical enough for a factory

In order to reduce the amount of washing liquid used, it is necessary to make the slurry evenly distributed and flow smoothly when it enters the dehydration carrier. At present, there are many problems in the devices used to make the slurry evenly distributed and flow smoothly, such as for slurry washing and Concentrated twin-roll press machine adopts a pulp distributing device with pulp feeding at one end. After running for a long period of time, the pulp separation port far away from the pulp feeding end will be blocked due to low pressure, so that the pulp entering the dehydration carrier will be distributed. Uneven, due to the uneven distribution of the slurry, the amount of washing liquid will be increased in the subsequent washing process, which will increase the production cost

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