An integrated device and method for reaction, separation, washing, evaporation and drying

A reaction device and reaction technology, applied in the direction of improving process efficiency, etc., can solve problems such as poor leaching, filtration and washing effects, large reaction liquid phase volume, and increased washing times, so as to reduce the content of pharmaceuticals and valuable components, and reduce the operation Simple and convenient, the effect of improving the recovery rate

Inactive Publication Date: 2018-04-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the washing method is dense washing, and a large amount of unreacted and complete residual acid still remains in the underflow solid phase, so the residual acid must be washed by increasing the number of washings. The leaching reaction and dense washing are carried out in different equipment, which increases the equipment cost. The equipment occupies a large area and is cumbersome to operate, and the above devices do not involve the technical fields of evaporation, crystallization and drying, and the reaction is limited to the traditional leaching reaction
[0005] In view of the frequent transfer of materials in the traditional reaction, separation and washing process, the equipment occupies a large area and the effect of leaching, filtration and washing is not good, the reaction liquid phase is large and difficult to concentrate and purify, a set of reaction, separation, washing, evaporation and drying is designed. The device and method realize the perfect combination of the leaching device and the filtering and washing device. The equipment occupies a small area and has good thermal insulation performance, easy to operate, clean water and chemicals are recycled, clean and environmentally friendly, and has broad application prospects.

Method used

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  • An integrated device and method for reaction, separation, washing, evaporation and drying
  • An integrated device and method for reaction, separation, washing, evaporation and drying
  • An integrated device and method for reaction, separation, washing, evaporation and drying

Examples

Experimental program
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Effect test

Embodiment 1

[0054] High pressure and high temperature leaching, impurity removal, separation and washing of clay vanadium ore

[0055] The test raw material was taken from a clay vanadium mine in Hubei, and its chemical composition is shown in the following table:

[0056]

[0057] It can be seen from the table that the main chemical composition of the clay is SiO 2 and Al 2 o 3 , where V 2 o 5 The calculated grade is 1.72%.

[0058] Crush the ore until the particle size is less than 3mm, accounting for 100%, add leaching aid MnO 2 , the amount is 3% to account for the mass fraction of clay vanadium ore, adding sulfuric acid with a mass fraction of 20% is made into a slurry with a solid-to-liquid ratio of 1:1.5, and the slurry is driven into the reaction compartment with a pump, and the stirring speed of the stirring scraper is The temperature is 150r / min, and the tail gas is introduced to pressurize the reaction pressure to 0.3MPa. The material in the reaction compartment is hea...

experiment example 2

[0061] Acid leaching vanadium solution precipitation vanadium

[0062] The vanadium solution in this example is the leaching solution obtained by leaching in Example 1, the pH of the solution is adjusted to be 2.4, and the tetravalent vanadium ions are extracted with P204 organic phase, and then the sulfuric acid solution of 1.5mol / L is used as a stripping agent to remove Impurities in the acid leaching vanadium solution obtain a relatively pure vanadium-containing solution, and the solution composition is as shown in the table below:

[0063]

[0064] Adjust the pH of the solution to be 5, the vanadium-containing solution and 250g / L of NH 4 Add equal volumes of Cl into the reaction compartment. At this time, the ammonium addition coefficient is K=5, the stirring speed of the stirring scraper is 150r / min, and the liquid phase in the reaction compartment is heated by a heating device. At 30°C, the reaction pressure React at 0.3MPa for 1 hour to produce precipitated sodium a...

Embodiment 3

[0067] Straw Hydrolysis Sugar

[0068] The straw in this example is taken from a farmland in Xiaogan, Hubei, China. After natural air-drying, it is crushed to below 20 meshes. Its main components are hemicellulose, cellulose, lignin, and reducing sugar, and its moisture content is 6.23%.

[0069] Take straw samples under 20 mesh and mix them with sulfuric acid with a mass fraction of 5% to make a material with a solid-to-liquid ratio of 1:2. Use a pump to pump the mixture into the reaction compartment, and the stirring speed of the stirring scraper is 150r / min, feed tail gas and pressurize to the reaction pressure of 0.3MPa, soak in water at 125°C, react for 2 hours, filter to obtain the leachate, and wash the reaction slag three times with the washing method adopted in the present invention, and discharge Leach residue.

[0070] The hydrolyzed reducing sugar yield was 57.30%.

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Abstract

The invention provides a reaction, separation, washing, evaporation and drying integrated device and method and belongs to the field of hydrometallurgy and the chemical industry. The device is mainly composed of unit partition chambers and accessory equipment. The partition chambers are connected through partition plates with holes, and according to different process combinations of the leaching reaction process, the separation and washing process, the crystallization and drying process and the like and different treatment objects, specific filtering films are selected and used for the partition plates with the holes, and upper sealing rings and lower sealing rings are arranged to seal the partition chambers. According to the different treatment objects, certain process procedures of the leaching reaction process, the separation and washing process and the crystallization and drying process are finished continuously in the partition chambers. By the adoption of the high-diameter high-ratio independent partition chamber space, control over the pressure, the temperature, the stirring speed and other reaction conditions is facilitated; and by the adoption of stirring scrapper devices with holes, the high-solid-liquid-ratio solid-liquid phase reaction and the high-concentration liquid phase reaction are easy to accelerate, and the mass transfer rate is increased. By the adoption of the method, adaptability to the procedures and treatment capacity is high, energy, water and chemicals can be used in a cyclic manner, cleanness and environment friendliness are achieved, and operation is convenient.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy and chemical industry, and relates to a high solid-liquid ratio solid-liquid two-phase, or high-concentration liquid phase leaching reaction, separation and washing, crystallization and drying in an integrated device and method. The device is mainly composed of a main device and an auxiliary device. The compartments are unitized, and the number of compartments is set according to the processing capacity. Compartment space with high diameter-to-height ratio, stirring scraper with holes is easy to accelerate solid-liquid two-phase with high solid-liquid ratio, and high-concentration liquid phase reaction and improve mass transfer efficiency, and the independent space is easy to pressure, temperature, stirring rate According to the different processing objects, several processes in the process of reaction, separation, washing, evaporation, crystallization and drying can be completed continuously and stab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/02
CPCC22B3/02Y02P10/20
Inventor 冯雅丽邓祥意李浩然
Owner UNIV OF SCI & TECH BEIJING
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