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Double-blowing system for distribution head of vacuum disc filter

A technology of distributing head and filter, applied in filtration separation, moving filter element filter, separation method, etc., can solve the problems of difficult control of liquid level in slurry tank, substandard production capacity, high moisture content of filter cake, and achieve normal feeding volume. Stabilizing, maintaining thorough cleaning, reducing cake moisture

Active Publication Date: 2022-02-11
CITIC HEAVY INDUSTRIES CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The filter disc can only be partially unloaded, and the filter cloth cannot be recycled, which may easily cause the production capacity to fail to meet the standard
And the filter cake is adsorbed on the filter cloth for a long time, and squeezed further by the scraper, the filter cake is seriously hardened, which can easily cause the filter cloth to be blocked, seriously shorten the service life of the filter cloth, cause frequent replacement of the filter cloth, and increase the use cost
In addition, the separate blowing area occupies a part of the entire circumference of the distribution head, which will reduce the drying area accordingly, further causing the high moisture content of the filter cake, an important technical indicator of solid-liquid separation, and affecting the production of the entire process system.
Due to the control bottleneck of the single blowing system, the liquid level of the slurry tank is difficult to control, and the liquid level is prone to overflow or low, which affects the production of the subsequent process system

Method used

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  • Double-blowing system for distribution head of vacuum disc filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, the feed rate is normal and stable, and when the material properties are good, the filter cake on the filter cloth is thicker, and only scraper discharge can meet the production requirements, and only need to open the third valve 8 at intervals to make the liquid level fall into the blowing area 9 is connected to the compressed air system 6, providing partial regeneration of the filter cloth under the liquid level 13, which can not only maintain the high vacuum operation of the system, but also help to increase production capacity, reduce the moisture content of the filter cake, and keep the filter medium and filter cloth thoroughly clean. Extended service life.

Embodiment 2

[0026] Embodiment 2, under the normal operation of the vacuum disc filter, it is necessary to further increase the slurry processing capacity, increase the production capacity and require lower moisture in the filter cake, it is necessary to open the first valve 4 and close the second valve 5 to make the liquid level rise. The blowing area 7 is connected with the drying area 2, which increases the area of ​​the drying area 7, prolongs the drying time of the filter cake, and greatly reduces the moisture content of the filter cake. The third valve 8 is opened and the fourth valve 10 is closed, and the blowing zone 9 under the liquid level blows continuously, and the filter cake adsorbed on the filter cloth falls off completely in the slurry tank under the liquid level 13, and the filter cake is allowed to flow again in the liquid suction zone 12. The cloth absorbs the thicker filter cake, and it is discharged at the scraper discharge place.

Embodiment 3

[0027] Embodiment 3, when the material properties are bad, the capacity of the vacuum disc filter is easily limited, and a large amount of overflow of the slurry tank is likely to occur. Only relying on scraper unloading can not meet the production capacity at all. Open the second valve 5 and the third valve 8 to connect the blowing zone 7 on the liquid level and the blowing zone 9 on the liquid level to the compressed air system 6 and blow air at the same time. Through the blowing zone 7 on the liquid level, the filter cake is completely dropped into the discharge bin to increase the production capacity. After passing through the blowing zone 9 under the liquid level, the filter cloth is thoroughly cleaned, and new filter cake is re-absorbed.

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Abstract

A double-blowing system for a distribution head of a vacuum disc filter comprises a distribution head; the upper portion of the distribution head is provided with a suction-dry area and a liquid level upper blowing area; the suction-dry area is provided with a suction-dry area liquid discharge pipe, the liquid level upper blowing area is provided with a first pipeline and a second pipeline, the first pipeline is provided with a first valve and is connected with the suction-dry area liquid discharge pipe, and the second pipeline is provided with a second valve and is connected with a compressed air system; the lower part of the distribution head is provided with a liquid suction area and a liquid level lower blowing area; and the liquid suction area is provided with a liquid suction area liquid discharge pipe, the liquid level lower blowing area is provided with a third pipeline and a fourth pipeline, the fourth pipeline is provided with a fourth valve and is connected with the liquid suction area liquid discharge pipe, and the third pipeline is provided with a third valve and is connected with the compressed air system. The adaptability of the vacuum disc filter to various materials is greatly improved, the use bottleneck of a vacuum disc dehydrator is overcome, and the disc filter has a better market prospect.

Description

Technical field: [0001] The invention belongs to the technical field of vacuum disc filters, and in particular relates to a double blowing system of a distribution head of a vacuum disc filter. Background technique: [0002] Vacuum disc filters are widely used in the filtration and separation of solid particles of different sizes such as desulfurization gypsum in thermal power plants, concentrates and tailings in the mining industry. [0003] The filter medium of the vacuum disc filter is filter cloth, and multiple fan-shaped plates equipped with filter cloth are installed on the central axis to form a filter disc. The filter disc runs slowly in the slurry tank, and the solid particles form a filter cake on the filter cloth by using the negative pressure of the vacuum. After the filter cake is sucked dry, it reaches the unloading bin, and is unloaded by the scraper and blowing unloading device to realize the solid-liquid separation of the material. A working cycle of a tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D33/19B01D33/66B01D33/48B01D33/76
CPCB01D33/19B01D33/66B01D33/48B01D33/76
Inventor 张盼龙高良玉张宏党继锋宋虎刘瑞路光远解华华吴帅霍华王克俊申飞张晓峰
Owner CITIC HEAVY INDUSTRIES CO LTD
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