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Filtration production line with function of recovering crystals in separation liquid

A production line and separation liquid technology, applied in the direction of filtration loop, filtration separation, separation method, etc., can solve the problems of fine crystal accumulation, affecting system operation, separation difficulty, etc., to reduce the loss of soda ash and increase production capacity.

Pending Publication Date: 2022-01-28
重庆江北机械有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention intends to provide a filtration production line with recovery of crystals in the separation liquid to solve the problem that the existing soda ash processing system is difficult to separate due to fine crystal accumulation and hardening, which affects the operation of the system

Method used

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  • Filtration production line with function of recovering crystals in separation liquid
  • Filtration production line with function of recovering crystals in separation liquid

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Experimental program
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Embodiment 1

[0033] This embodiment is basically as attached figure 1Shown: a filtration production line with recovery of crystals in the separation liquid, including a vacuum filtration unit, a primary dehydration unit and a secondary dehydration unit, the secondary dehydration unit is connected with a recoil structure.

[0034] The vacuum filtration unit is used for preliminary filtration of the sodium bicarbonate suspension (suspension of heavy alkali) discharged from the carbonation tower to reduce the water content of the heavy alkali to 17-19%. The vacuum filtration unit includes an alkali outlet tank 1, a vacuum filter 2, an lye bucket 3 and a wet heavy alkali belt 4. The structure of the vacuum filter 2 in this embodiment is a vacuum filter 2 commonly used in the prior art, including a casing, a feed pipe, an alkali solution tank 5, a filter drum 6, a pressure roller 7 and a scraper 8. The feed pipe is provided with a cock for adjusting the liquid intake, and the lye tank 5 is equ...

Embodiment 2

[0044] Such as figure 2 As shown, the difference between this embodiment and Embodiment 1 is: In this embodiment, the difference between this embodiment and Embodiment 1 is: In this embodiment, the piston pusher centrifuge 14 is a two-stage piston pusher centrifuge. The material centrifuge, the piston pusher centrifuge 14 includes a casing 25, a drum assembly, a pushing plate 26 and a hydraulic assembly, wherein the structure of the drum assembly is optimized. The drum assembly includes a distribution cone 27, a primary drum 28 and a secondary drum 30. The distribution cone 27 is fixed on the pushing disc 26, and the pushing disc 26 is fixed on the bottom of the secondary drum 30 through a pillar. An inner pusher bow is connected between the disc 26 and the primary drum 28 , and an outer pusher bow is connected between the first drum 28 and the second drum 30 . The secondary drum 30 includes a straight section at the left end and a flared cone section at the right end. The p...

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Abstract

The invention relates to the field of sodium carbonate processing, and discloses a filtration production line with a function of recovering crystals in separation liquid. The filtration production line comprises a vacuum filtration unit, a primary dehydration unit and a secondary dehydration unit, the primary dehydration unit comprises a piston pushing centrifugal machine, the secondary dehydration unit comprises a siphon scraper centrifugal machine and a backflushing structure, and the feeding end of the siphon scraper centrifugal machine is connected with the liquid outlet end of the piston pushing centrifugal machine. According to the technical scheme, the piston pushing centrifugal machine and the siphon scraper centrifugal machine are combined for use, secondary dehydration of the sodium carbonate is achieved, the moisture content of the sodium carbonate can be reduced to 10%-12% in a grading mode, and energy consumption of later calcination is greatly reduced. Besides, by arranging a backflushing component, a filter medium of the centrifugal machine can be backflushed, on one hand, the influence on the dehydration effect caused by accumulation of fine grains can be avoided, and on the other hand, recovered fine grains can be directly calcined, so that the sodium carbonate loss is reduced, and the productivity of a sodium carbonate production line is improved.

Description

technical field [0001] The invention relates to the field of soda ash processing, in particular to a filtration production line with recovery of crystals in the separation liquid. Background technique [0002] Sodium carbonate (Na 2 CO 3 ), molecular weight 105.99, the purity of chemicals is more than 99.5% (mass fraction), also known as soda ash, has another name called soda or soda ash in international trade, is a kind of basic chemical raw material, is widely used in medicine (for medical treatment) Treatment of hyperacidity), papermaking, metallurgy, glass, textiles, dyes and other fields. At present, the traditional soda ash production process is to send the heavy alkali (sodium bicarbonate) filtered out by the vacuum filter into the calciner for calcination to obtain soda ash (sodium carbonate). In order to reduce the water content of heavy alkali and reduce the energy consumption of calcination, many soda ash factories have introduced piston pusher centrifuges to d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D36/04B01D35/16C01D7/00
CPCB01D36/045B01D35/16C01D7/00
Inventor 张剑鸣谭建平龙泉钢陈为民
Owner 重庆江北机械有限责任公司
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