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Equipment for solid-liquid separation and drying of fine-powder slurry, and method therefor

A technology for solid-liquid separation and drying equipment, applied in separation methods, lighting and heating equipment, chemical instruments and methods, etc., can solve problems such as poor thermal efficiency, and achieve the goal of suppressing temperature reduction, eliminating temperature reduction, and realizing drying load reduction. Effect

Active Publication Date: 2016-08-31
TSUKISHIMA KIKAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the spray dryer has the problem that its thermal efficiency is poor compared with other drying methods such as flow drying or indirect heating drying.

Method used

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  • Equipment for solid-liquid separation and drying of fine-powder slurry, and method therefor
  • Equipment for solid-liquid separation and drying of fine-powder slurry, and method therefor
  • Equipment for solid-liquid separation and drying of fine-powder slurry, and method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0137]

[0138] In order to confirm the effects of the present invention, the present inventors used figure 1 The equipment has carried out the solid-liquid separation and drying of nickel-cobalt-manganese compounds.

[0139] A nickel cobalt manganese compound with a liquid content of 90 wt% (W.B.) was treated. If converted to the amount of dry matter, the throughput is 100kg / h.

[0140] After the nickel-cobalt-manganese compound is treated by the solid-liquid separation device 51 of the present invention, the liquid content can be reduced to 15 wt% (W.B.) at the outlet.

[0141] The solid-liquid-separated object (deliquified object) is sent to the drying device 53 using a belt conveyor, and after being dried by the drying device 53, it can be dried to 1 wt% (W.B.).

[0142] By this drying, the temperature of the object to be processed, which is 10° C. at the supply port 53A, rises to 120° C. at the discharge port 53B. The supply rate of the carrier gas G was 35 kg / hr.

...

Embodiment 2 and comparative example 1

[0145] Such as Figure 5 As shown in (A) and (B), drying by using a steam tube dryer (hereinafter referred to as "STD"), which is an indirect heating type horizontal rotary dryer, and using an airflow dryer such as a spray type Drying was carried out, and the oxygen concentration on the outlet side was investigated. It is 20 vol% in the case of the blow dryer, and 11 vol% in the case of STD.

[0146] This means: In the case of STD, the oxidation reaction of the dried product is suppressed, so it is suitable for drying materials aimed at avoiding quality deterioration caused by oxidation.

[0147]

[0148] In addition, since it was found that when the carrier gas is convected, the moisture in the exhaust gas condenses and condenses on the processed object, so after investigating how much the moisture in the processed object after drying treatment increased It can be seen that in the case of parallel flow, the water content increases to 15 wt% (W.B.), and in the case of conv...

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Abstract

The present invention addresses the problem of inhibiting the contamination of a dried product, the shape change of particles and the size distribution change thereof. This equipment is provided with: a solid-liquid separator in which an object to be treated is dehydrated not only by supplying the object to a space between one pair of endless separation filter cloths that are wound around the outer circumference of a separation roll, and thus squeezing the object, but also by a gas passed through air-passing holes formed in the outer-circumference surface of the separation roll; and a horizontal rotary dryer which is equipped on the downstream side of the solid-liquid separator and in which a carrier gas is passed through a rotating cylinder in a cocurrent manner in the same direction as that of the conveyance direction of the object.

Description

technical field [0001] The invention relates to solid-liquid separation and drying equipment for fine powder slurry. In particular, it relates to a solid-liquid separation and drying device for a slurry capable of suppressing abrasion of the device by the metal fine powder when the slurry containing the metal fine powder is filtered and dried, and a method thereof. Background technique [0002] In the production process of metal oxides and metal hydroxides used as battery materials, etc., in order to finally realize commercialization as metal fine powders, generally after filtering the slurry containing metal fine powders, the air dryer or A spray dryer is used to dry it to obtain a dried product of the target metal oxide or metal hydroxide. [0003] More specifically, in the case of drying with an airflow dryer, the agglomerated wet powder from the filtration process is conveyed in the tube of the dryer by means of hot air, and during the conveying process, the convective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B17/32B01D33/04B01D33/58B01D33/80C22B7/00C22B9/02F26B5/14F26B17/28
CPCF26B5/14F26B17/28F26B17/32F26B17/02B01D33/04B01D33/58B01D33/80C22B7/00C22B9/02B01D33/642B01D33/666
Inventor 中田洋一渡会知则佐藤澄人诹访聪本间友基
Owner TSUKISHIMA KIKAI CO LTD