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Vacuum upper-pumping technology of tilting pan filter

A kind of air extraction technology and filter technology, which is applied in the direction of phosphorus oxyacid, phosphoric acid, etc., can solve the problems of domestic filter production capacity not being effectively utilized, liquid foam entrainment, etc., and achieve simple maintenance and cleaning, low cost, and improved The effect of capacity

Active Publication Date: 2008-10-22
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vacuum pumping technology for a flip-type filter to solve the problems that the production capacity of domestic filters cannot be effectively utilized and the entrainment of liquid foam is serious

Method used

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  • Vacuum upper-pumping technology of tilting pan filter
  • Vacuum upper-pumping technology of tilting pan filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0010] Embodiment: The used disc filter of Wengfu (Group) Co., Ltd. Phosphate Fertilizer Factory is the PF120 type disc filter produced by Hangzhou Chemical Machinery Factory, 2 sets.

[0011] The company's original vacuum pumping is shown in Figure 2. Now, the vacuum pumping technology of the flip-type filter shown in Figure 1 is adopted, and the pumping line 4 is connected to a washing pump 6, an acid return pump 7, and a filter acid pump. 8 The inlet pipeline is separated, the gas-liquid phase is no longer mixed and the same pipeline is used; the pre-separator 1 on the suction pipeline is removed; the defoaming separator 9 to prevent flooding is added between the distribution head 3 and the suction pipeline 4; the vacuum pipeline It is connected above the demister separator 9 and connected with the filter separator 5.

[0012] After the company changed from bottom pumping to up pumping, the liquid phase and gas phase pipelines were separated, which improved the permeability...

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PUM

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Abstract

The invention discloses a vacuum up draft technology for a tilted pan type filter, which relates to a vacuum extraction device of a filter. In the technology, an air extracting pipeline (4) is separated from a washing pump (6), an acid returning pump (7) and an inlet pipeline of an acid filtering pump (8), so that the gas phase and the liquid phase do not share the same pipeline; a pre-separator (1) on a vacuum pipeline is removed; a defoaming separator (9) for preventing flooding is arranged between a dispensing head (3) and the air extracting pipeline (4); the vacuum pipeline is connected above the defoming separator (9) and connected with a separator (5) of the filter. By adopting the vacuum up draft technology for the tilted pan type filter, the problems caused by little filtrate and foam entrainment can be solved, the production capacity of the system is improved and the vacuum pipeline is shortened; during the use process, the device of the invention can be maintained and cleared up conveniently and the technology has the advantages of low cost and simple maintenance and clearing up, which is suitable for enterprises that adopt a tilted pan type filter to produce phosphoric acid by wet process.

Description

technical field [0001] The present invention relates to filters with rotating filter discs, and in particular to vacuum devices for tilting disc filters. Background technique [0002] As we all know, the flip filter is one of the important equipment in the production of wet-process phosphoric acid. The flip-type vacuum filters made in China all adopt the "downward suction type", that is, the vacuum tube is connected below the distribution head of the filter, and the vacuum pipeline is mixed with the gas-liquid phase of the inlet pipeline of the first washing pump, acid return pump and filter acid pump. Use; In order to prevent entrainment of liquid foam during pumping, a separator is also installed on the pipeline. The disadvantage of this method is that the liquid phase and gas phase pipelines are mixed, the liquid flow is not smooth, the amount of filtrate is small, and the entrainment of liquid foam is very serious, which affects the production capacity of the system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/22
Inventor WU SONGGUO SHIWEIYAO SHILINHUANG JINZHANG TAOLIU HAIWU BINFENG KEMINWEN HUIJI GUOXIANGPENG JINGLI WEIHONG
Owner WENGFU (GRP) CO LTD