CN113509788B - Diatomite recovery method of disc filter - Google Patents
Diatomite recovery method of disc filter Download PDFInfo
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- CN113509788B CN113509788B CN202110738616.9A CN202110738616A CN113509788B CN 113509788 B CN113509788 B CN 113509788B CN 202110738616 A CN202110738616 A CN 202110738616A CN 113509788 B CN113509788 B CN 113509788B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
Abstract
The invention discloses a diatomite recovery method of a disc filter, which comprises a disc filter and a mixing stirring tank connected with the disc filter, wherein the inlet of the disc filter is connected with compressed air, the disc filter is cleaned and filtered by white spirit filter liquid, and then the diatomite in the disc filter is degreased by 95% alcohol, so that the degreasing recovery of the diatomite is completed, the reuse is facilitated, the method is simple, and the diatomite recovery cost is low.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a diatomite recovery method for a disc filter.
Background
At present, a disc filter is generally adopted for filtering white spirit, the filtering effect is good, the use is wide, however, after the white spirit is filtered, diatomite in the disc filter must be discarded or uniformly treated if the filtering amount is large, and the treatment cost is high.
Therefore, the skilled person is working to develop a low cost method and system for recovering diatomaceous earth in a disc filter.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a low-cost method for recovering diatomaceous earth in a disc filter.
In order to achieve the aim, the invention provides a diatomite recovery method of a disc type filter, which comprises the disc type filter and a mixing and stirring tank connected with the disc type filter, wherein an inlet of the disc type filter is connected with compressed air, and the method comprises the following steps:
1) filtering the liquor stock solution by using the disc filter and the mixing and stirring tank to obtain liquor filtrate;
2) conveying part of the white spirit filtrate into the disc filter again to perform full circulating exhaust sampling, converting the white spirit filtrate into a circulating filtering state after the white spirit filtrate meets the quality control requirement, and injecting the compressed air to continuously increase the working pressure in the disc filter, wherein the filtering amount is 3.5-4 tons per hour;
3) when the working pressure in the disc type filter reaches 4KG, the disc type filter stops filtering, and the compressed air is used for pushing the white spirit filtrate in the filter to the mixing and stirring tank;
4) adding 80KG of 95% alcohol into the disc filter, circulating the disc filter for at least 4 hours to carry out degreasing treatment on the diatomite in the disc filter, and finally discharging or recycling the alcohol containing lipid substances to finish the degreasing treatment on the diatomite;
the invention also provides a system for implementing the diatomite recovery method of the disc filter, which comprises the disc filter and a mixing and stirring tank connected with the liquid inlet of the disc filter, wherein the top of the mixing and stirring tank is connected with an outlet of a first liquid inlet pipe, the bottom of the mixing and stirring tank is connected with an inlet of a first liquid outlet pipe, the inlet of the first liquid inlet pipe is connected with one end of a raw liquid inlet pipe, a first valve, a first conveying pump, a fourth valve and a fifth valve in series, the first liquid outlet pipe is connected with a first filtering inlet of the disc filter through a second conveying pump, an eighth valve, a twelfth valve and a second liquid inlet pipe, and the raw liquid inlet pipe is connected with a second filtering inlet of the disc filter through the first valve, the third valve, a fourteenth valve and a third liquid inlet pipe in series; a third liquid outlet pipe of the disc type filter is connected with the top of the mixing and stirring tank through a connecting pipe and a sixth valve; one end of the third valve is also connected with a second valve and a filtrate outlet pipe in series; the top of the disc filter is also connected with a compressed air inlet pipe, a ninth valve and a fourth liquid inlet pipe in series.
The invention has the beneficial effects that: the method for recycling the kieselguhr of the disc type filter comprises the disc type filter and a mixing and stirring tank connected with the disc type filter, wherein compressed air is connected to an inlet of the disc type filter, the disc type filter is cleaned and filtered by white spirit filter liquid, and then the kieselguhr in the disc type filter is degreased by 95% alcohol, so that the degreasing and recycling of the kieselguhr are completed, the reuse is facilitated, the method is simple, and the recycling cost of the kieselguhr is low.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1, the diatomite recovery method of the disc filter comprises a disc filter and a mixing and stirring tank connected with the disc filter, wherein an inlet of the disc filter is connected with compressed air, and the method comprises the following steps:
1) filtering the liquor stock solution by using the disc filter and the mixing and stirring tank to obtain liquor filtrate;
2) re-conveying part of the white spirit filtrate into the disc filter to perform full circulating exhaust sampling, converting the white spirit filtrate into a circulating filtration state after the white spirit filtrate meets the quality control requirement, and injecting the compressed air to continuously increase the working pressure in the disc filter, wherein the filtration capacity is 3.5-4 tons per hour;
3) when the working pressure in the disc type filter reaches 4KG, the disc type filter stops filtering, and the compressed air is used for pushing the white spirit filtrate in the filter to the mixing and stirring tank;
4) adding 80KG of 95% alcohol into the disc filter, circulating the disc filter for at least 4 hours to carry out degreasing treatment on the diatomite in the disc filter, and finally discharging or recycling the alcohol containing lipid substances to finish the degreasing treatment on the diatomite;
a system for implementing the diatomite recovery method of the disc type filter comprises a disc type filter 1 and a mixing and stirring tank 2 connected with a liquid inlet of the disc type filter 1, the top of the mixing and stirring tank 2 is connected with an outlet of a first liquid inlet pipe 4, the bottom is connected with an inlet of a first liquid outlet pipe 6, the inlet of the first liquid inlet pipe 4 is connected in series with one end of a stock solution liquid inlet pipe 3, a first valve DN1, a first delivery pump P1, a fourth valve DN4 and a fifth valve DN5, the first liquid outlet pipe 6 is connected with the first filtering inlet of the disc type filter 1 through a second delivery pump P2, an eighth valve DN8, a twelfth valve DN12 and a second liquid inlet pipe 5, the stock solution inlet pipe 3 is connected with a second filtering inlet of the disc type filter 1 through the first valve DN1, the third valve DN3, the fourteenth valve DN14 and the third liquid inlet pipe 7 which are connected in series; the third liquid outlet pipe 8 of the disc type filter 1 is connected with the top of the mixing and stirring tank 2 through a connecting pipe 10 and a sixth valve DN 6; one end of the third valve DN3 is also connected in series with a second valve DN2 and a filtrate outlet pipe; the top of the disc filter 1 is also connected in series with a compressed air inlet pipe 9, a ninth valve DN9 and a fourth liquid inlet pipe 12.
The working principle of the system is as follows:
firstly, stirring and mixing, opening pipelines and valves such as a stock solution inlet pipe 3, a first valve DN1, a first delivery pump P1, a fourth valve DN4 and a fifth valve DN5 which enter a mixing and stirring tank 2, and closing pipelines and valves such as a second delivery pump P2, a first liquid outlet pipe 6, an eighth valve DN8 and a twelfth valve DN12 of the mixing and stirring tank 2.
Then precoating and circulation, the valves and lines of the mixing and stirring tank 2 to the disc filter 1 are opened, such as: the second delivery pump P2, the first liquid outlet pipe 6, the eighth valve DN8 and the twelfth valve DN 12; the valves and lines of the disc filter 1 to the mixing and stirring tank 2 are opened, such as: a third liquid outlet pipe 8, a connecting pipe 10 and a sixth valve DN 6.
And (3) filtering: on the basis of precoating and circulating production, the valves and pipelines communicated with the periphery of the mixing stirring tank 2 are closed, the first valve DN1 is closed, all mixed liquid is pumped into the disc filter 1 through the second delivery pump P2, liquid to be filtered continuously enters the disc filter 1 from the fourteenth valve DN14 and the third liquid inlet pipe 7 at the bottom, then the filtered liquid is discharged along the third liquid outlet pipe 8, the thirteenth valve DN13 and the second valve DN2, and the sixteenth valve DN16 in the middle is a sampling valve which is used for sampling and measuring the turbidity of the liquid.
Finally, the process of recovering the diatomite comprises the following steps:
firstly, closing a pipeline and a valve of a disc type filter 1 connected with a mixing and stirring tank 2, after the internal circulation of the disc type filter 1 is filtered for a period of time, opening the pipeline and the valve of the disc type filter 1 connected with the mixing and stirring tank 2, opening a compressed air inlet pipe 9, a ninth valve DN9 and a fourth liquid inlet pipe 12, conveying the white spirit filtrate in the disc type filter 1 into the mixing and stirring tank 2, then closing the pipeline and the valve of the disc type filter 1 connected with the mixing and stirring tank 2, and then conveying 95% alcohol 80KG into the disc type filter 1, wherein the internal circulation of the disc type filter is at least 4 hours, and lipid substances on diatomite are dissolved by the alcohol, so that the degreasing of the diatomite is completed, and the diatomite can be reused.
According to the method and the system, the disc filter is cleaned and filtered by adopting the white spirit filtrate, and then the diatomite in the disc filter is degreased by the 95% alcohol, so that the degreasing and recovery of the diatomite are completed, the reuse is facilitated, the method is simple, and the recovery cost of the diatomite is low.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (1)
1. The diatomite recovery method of the disc type filter comprises the disc type filter and a mixing and stirring tank connected with the disc type filter, wherein an inlet of the disc type filter is connected with compressed air, and the diatomite recovery method is characterized in that: the method comprises the following steps:
filtering the liquor stock solution by using the disc filter and the mixing and stirring tank to obtain liquor filtrate;
conveying part of the white spirit filtrate into the disc filter again to perform full circulating exhaust sampling, converting the white spirit filtrate into a circulating filtering state after the white spirit filtrate meets the quality control requirement, and injecting the compressed air to continuously increase the working pressure in the disc filter, wherein the filtering amount is 3.5-4 tons per hour;
when the working pressure in the disc type filter reaches 4KG, the disc type filter stops filtering, and the compressed air is used for pushing the white spirit filtrate in the disc type filter to the mixing and stirring tank;
adding 80KG of 95% alcohol into the disc filter, circulating the disc filter for at least 4 hours to degrease the diatomite in the disc filter, and finally discharging or recycling the alcohol containing lipid substances to finish the degreasing treatment of the diatomite;
the diatomite recovery system further comprises a disc type filter (1) and a mixing and stirring tank (2) connected with a liquid inlet of the disc type filter (1), the top of the mixing and stirring tank (2) is connected with an outlet of a first liquid inlet pipe (4), the bottom of the mixing and stirring tank is connected with an inlet of a first liquid outlet pipe (6), the inlet of the first liquid inlet pipe (4) is connected with one end of a raw liquid inlet pipe (3), a first valve (DN 1), a first conveying pump (P1), a fourth valve (DN 4) and one end of a fifth valve (DN 5) in series, the first liquid outlet pipe (6) is connected with a first filtering inlet of the disc type filter (1) through a second conveying pump (P2), an eighth valve (DN 8), a twelfth valve (DN 12) and a second liquid inlet pipe (5), and the raw liquid inlet pipe (3) is connected with the first filtering inlet of the disc type filter (1) in series through the first valve (DN 1), A third valve (DN 3), a fourteenth valve (DN 14) and a third liquid inlet pipe (7) are connected with a second filtering inlet of the disc type filter (1); a third liquid outlet pipe (8) of the disc type filter (1) is connected with the top of the mixing and stirring tank (2) through a connecting pipe (10) and a sixth valve (DN 6); one end of the third valve (DN 3) is also connected with a second valve (DN 2) and a filtrate outlet pipe in series; the top of the disc type filter (1) is also connected with a compressed air inlet pipe (9), a ninth valve (DN 9) and a fourth liquid inlet pipe (12) in series.
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