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Production process of granular ferrous chloride dihydrate

A ferrous chloride and production process technology, applied in the direction of ferric halide, etc., can solve the problems of easy agglomeration of products, high energy consumption, low production capacity of ferrous chloride dihydrate, etc. The effect of low production cost

Inactive Publication Date: 2020-04-03
3R ENVIRONMENTAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low production capacity, high energy consumption and easy agglomeration of the existing ferrous chloride dihydrate, and provide a method for converting the raw material of ferrous chloride solution into high-quality ferrous chloride solution under the conditions of high production capacity and low energy consumption. Process for stable, non-caking granular ferrous chloride dihydrate

Method used

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  • Production process of granular ferrous chloride dihydrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. The ferrous chloride solution obtained after pressure filtration is evaporated and concentrated, and the concentrated solution is continuously entered into a jacketed crystallization kettle with cooling water at a discharge rate of 2t / h for cooling;

[0020] 2. The concentrated solution of ferrous chloride is cooled in a crystallization kettle to obtain a concentrated solution in which ferrous chloride tetrahydrate crystals account for about 20%;

[0021] 3. The ferrous chloride concentrated solution obtained by cooling is continuously entered into the automatic centrifuge for centrifugation, and the solid falls from the outlet of the centrifuge to the conveyor belt of the conveyor to obtain ferrous chloride tetrahydrate crystals, and the mother liquor is returned to the raw material of ferrous chloride tank recycling;

[0022] 4. The output of the automatic centrifuge is discharged to the conveyor belt of the conveyor and continuously transported to the hopper of th...

Embodiment 2

[0027] 1. The ferrous chloride solution obtained after pressure filtration is evaporated and concentrated, and the concentrated solution is continuously entered into a jacketed crystallization kettle with cooling water at a discharge rate of 2t / h for cooling;

[0028] 2. The concentrated solution of ferrous chloride is cooled in a crystallization kettle to obtain a concentrated solution in which ferrous chloride tetrahydrate crystals account for about 20%;

[0029] 3. The ferrous chloride concentrated solution obtained by cooling is continuously entered into the automatic centrifuge for centrifugation, and the solid falls from the outlet of the centrifuge to the conveyor belt of the conveyor to obtain ferrous chloride tetrahydrate crystals, and the mother liquor is returned to the raw material of ferrous chloride tank recycling;

[0030] 4. The output of the automatic centrifuge is discharged to the conveyor belt of the conveyor and continuously transported to the hopper of th...

Embodiment 3

[0035] 1. The ferrous chloride solution obtained after pressure filtration is evaporated and concentrated, and the concentrated solution is continuously entered into a jacketed crystallization kettle with cooling water at a discharge rate of 5t / h for cooling;

[0036] 2. The concentrated solution of ferrous chloride is cooled in a crystallization kettle to obtain a concentrated solution in which ferrous chloride tetrahydrate crystals account for about 20%;

[0037] 3. The ferrous chloride concentrated solution obtained by cooling is continuously entered into the automatic centrifuge for centrifugation, and the solid falls from the outlet of the centrifuge to the conveyor belt of the conveyor to obtain ferrous chloride tetrahydrate crystals, and the mother liquor is returned to the raw material of ferrous chloride tank recycling;

[0038] 4. The output of the automatic centrifuge is discharged to the conveyor belt of the conveyor and continuously transported to the hopper of th...

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Abstract

The invention discloses a production process of granular ferrous chloride dihydrate. The production process comprises the following steps: continuously evaporating and concentrating a ferrous chloridesolution subjected threated through filter pressing to obtain a ferrous chloride concentrated solution, and continuously feeding the ferrous chloride concentrated solution into a crystallization kettle with a jacket with cooling water at a discharge speed of 2-8t / h for cooling; cooling the ferrous chloride concentrated solution in the crystallization kettle to obtain a concentrated solution of ferrous chloride tetrahydrate crystals; continuously centrifuging through an automatic centrifuge to obtain ferrous chloride tetrahydrate crystals; continuously conveying the ferrous chloride tetrahydrate crystals to a feeding hopper of an air flow dryer through a conveyor; spirally conveying ferrous chloride tetrahydrate into a pulse drying tower through the feeding hopper; and drying and dehydrating in hot air at the temperature of 120-250 DEG C and the flow rate of 20-50m / s to form ferrous chloride dihydrate. The production process is high in productivity, low in energy consumption and cleanin operation, the produced granular product is stable in quality, not prone to caking, good in water solubility and convenient to use, and the requirements of the soil conditioner industry and the feed industry are met.

Description

technical field [0001] The invention relates to the technical field of compound production, in particular to a production process of granular ferrous chloride dihydrate. Background technique [0002] At present, the production of ferrous chloride dihydrate is mainly divided into two types. The first one is to evaporate and concentrate the concentrated solution with a part of solid crystallization to obtain the product by centrifugation above 70 °C. The product produced by this method has heavy acid mist and high In the cooling process, it is easy to oxidize, agglomerate, and the quality is unstable, which affects the use; the second is to pass the ferrous chloride solution (or waste hydrochloric acid) through iron powder to reduce the acidity, and then evaporate the water through the spray drying system to obtain a powder product , because the process is affected by equipment material selection, production energy consumption, product agglomeration and tail gas treatment, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/10
CPCC01G49/10
Inventor 周小江丁德才车莹陈小哲朱浩王权永
Owner 3R ENVIRONMENTAL TECH CO LTD
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