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Phosphoric acid purification device

A purification device and phosphoric acid technology, which is applied in the direction of phosphorus compounds, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of large floor area of ​​multi-stage mixing-mixing tank, high equipment cost and operation cost, and difficulty in internal cleaning, etc. Achieve the effect of saving equipment investment, low cost, and small footprint

Active Publication Date: 2010-12-29
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the chemical equipment that can realize the functions of extraction, washing and stripping are mainly as follows: Multi-stage mixing-settling tank is a typical step-by-step contact liquid-liquid mass transfer equipment, in which each stage includes two parts: mixer and settling tank, The main disadvantages of this kind of equipment are: the horizontally arranged multi-stage mixing-mixing tank occupies a large area, each stage is equipped with a stirring device, the flow of fluid between stages generally needs to be transported by pumps, and the equipment cost and operating cost are low. Larger; sieve tray tower, the light and heavy phases flow countercurrently in the tower, and the two phases are in cross-flow contact on each tray. The mass transfer efficiency of this tower is relatively high, but its internal structure is more complicated, and the production cost is higher. Internal cleaning is difficult; packed tower, packed tower structure is relatively simple, but the efficiency is low, can not be used for materials with solid particles and easy to scale; pulse packed tower and pulse sieve plate tower, in order to improve the contact between the two phases, strengthen mass transfer In the process, mechanical energy is added to the packed tower and sieve plate tower to cause pulsation, and the generation of pulsation is usually realized by reciprocating pump or compressed air. This type of equipment has high mass transfer efficiency, but the production cost is high, internal cleaning is difficult, and the operating cost Higher; vibrating sieve plate tower, the sieve plate in the vibrating sieve plate tower is fixed on a central shaft, driven by a crank linkage mechanism, the tower is limited by the material of the equipment, it is difficult to enlarge, and the operating cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see figure 1 , adopt single-stage extraction, washing and stripping phosphoric acid purification device, including extraction device, washing device and stripping device, wherein: the first-stage light phase outlet 7 of the extraction device is connected with the continuous phase fluid inlet 30 of the washing device, and the light phase of the washing device The outlet 34 is connected to the primary solvent inlet 60 of the stripping device, and the primary light phase outlet 58 of the stripping device is connected to the primary solvent inlet 9 of the extraction device;

[0023] The extraction device includes an extraction device primary emulsifier 1 and an extraction device primary phase separation device 2. The extraction device primary emulsifier 1 is equipped with an extraction device primary emulsifier inlet 3 and an extraction device primary emulsifier outlet 4. The extraction device The primary phase separation equipment 2 is provided with the primary mixed phase i...

Embodiment 2

[0030] see figure 2 , using secondary extraction, washing and stripping phosphoric acid purification device, including extraction device, washing device and stripping device, wherein: the first-level light phase outlet of the extraction device 7, through the pipeline equipped with a pump and the secondary solvent inlet of the extraction device 18 is connected, the secondary heavy phase outlet 15 of the extraction device is connected to the primary phosphoric acid inlet 8 of the extraction device through a pipeline provided with a pump, and the secondary light phase outlet 16 of the extraction device is connected to the continuous phase fluid inlet 30 of the washing device;

[0031] The light phase outlet 34 of the washing device is connected with the secondary continuous phase fluid inlet 38 of the washing device through a pipeline provided with a pump; the secondary heavy phase outlet 43 of the washing device is connected with the dispersed phase fluid inlet 31 of the washing...

Embodiment 3

[0037] see image 3 , using three-stage extraction, washing and stripping phosphoric acid purification device, including extraction device, washing device and stripping device, the secondary light phase outlet 16 of the extraction device is connected to the third-stage solvent inlet 27 of the extraction device, and the third-stage heavy phase of the extraction device The outlet 24 is connected to the secondary phosphoric acid inlet 17 of the extraction device through a pipeline provided with a pump, and the light phase outlet 25 of the third-stage phase separation device of the extraction device is connected to the continuous phase fluid inlet 30 of the washing device;

[0038] The secondary light phase outlet 42 of the washing device is connected with the tertiary continuous phase fluid inlet 46 of the washing device, the tertiary heavy phase outlet 51 of the washing device is connected with the secondary dispersed phase fluid inlet 39 of the washing device, the tertiary light...

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Abstract

The invention discloses a phosphoric acid purification device, comprising an extraction device, a washing device and a back extraction device, wherein the extraction device and the back extraction device select a single-stage phosphoric acid purification device formed by a group of emulsifying machines and a group of phase separation equipment or a multi-stage phosphoric acid purification device formed by multiple groups of emulsifying machines and multiple groups of phase separation equipment; the washing device selects a single-stage phosphoric acid purification device formed by a group of mixers and a group of phase separation equipment or a multi-stage phosphoric acid purification device formed by multiple groups of mixers and multiple groups of phase separation equipment; a first-stage solvent inlet of the extraction device is connected with a light phase outlet of final-stage phase separation equipment of the back extraction device; a continuous phase fluid inlet of the washing device is connected with a light phase outlet of final-stage phase separation equipment of the extraction device; and a first-stage solvent inlet of the back extraction device is connected with a light phase outlet of final-stage phase separation equipment of the washing device. The device can strengthen mass transfer performance, improve purifying efficiency, reduce equipment investment and operating cost and occupy less area.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a phosphoric acid purification device. Background technique [0002] Purification of phosphoric acid by solvent extraction is currently a commonly used process for purification of phosphoric acid. Solvent extraction generally includes extraction, washing, and back-extraction processes. At present, the chemical equipment that can realize the functions of extraction, washing and stripping are mainly as follows: Multi-stage mixing-settling tank is a typical step-by-step contact liquid-liquid mass transfer equipment, in which each stage includes two parts: mixer and settling tank, The main disadvantages of this kind of equipment are: the horizontally arranged multi-stage mixing-mixing tank occupies a large area, each stage is equipped with a stirring device, the flow of fluid between stages generally needs to be transported by pumps, and the equipment cost and operating cost are low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/234
Inventor 王邵东李红林冉瑞泉吕阳成
Owner WENGFU (GRP) CO LTD