CN215403529U - Anodic oxidation line sewage treatment recycling system - Google Patents

Abstract

The utility model discloses a sewage treatment and recycling system of an anodic oxidation line. A lifting pump is arranged between the sewage collecting tank and the neutralization reaction tank, and between the neutralization reaction tank and the inclined tube sedimentation tank, a diaphragm pump is arranged between the inclined tube sedimentation tank and the first pressure filter, and the first pressure filter is connected with the neutralization reaction tank through a return pipe; a lifting pump is arranged between the mixing reactor and the inclined tube sedimentation tank, a bubble generator is arranged in the mixing reactor, a scraper is arranged at the top of the mixing reactor, a mud valve is arranged at the bottom of the mixing reactor, and the mud valve is connected with a second filter press through a pipeline; the regulating tank is connected with the mixing reactor and is connected with a third filter press through a screw pump; the filters are connected through a pipeline, and the ultrafiltration membrane filter is connected with the primary recycling tank; a lifting pump and a high-pressure pump are arranged between the first-stage recycling tank and the R/O membrane reverse osmosis device, the R/O membrane reverse osmosis device is connected with a water production pipe, and the water production pipe is connected with the second-stage recycling tank. The utility model saves water by 70 percent and can treat sludge in an energy-saving way.

Description

Anodic oxidation line sewage treatment recycling system

The technical field is as follows:

the utility model belongs to the technical field of anodic oxidation production, and particularly relates to an anodic oxidation line sewage treatment and recycling system.

Background art:

in the anodic oxidation process, a large amount of sewage is generated through acid washing and cleaning, a large amount of water resources are wasted due to the discharge of the treated sewage, the national water-saving requirement is not met, and the problem to be solved is how to treat and recycle the sewage generated in the anodic oxidation process. In addition, the sewage treatment to obtain the sludge rich in moisture is also a solution to the problem of how to treat the sludge rich in moisture at low cost because the sludge drying cost is high, the sludge treatment without drying is troublesome, and the sludge cannot be treated by incineration, landfill and the like.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

The utility model has the following contents:

the utility model aims to provide a sewage treatment and recycling system of an anodic oxidation line, thereby overcoming the defects in the prior art.

In order to achieve the above object, the present invention provides an anodic oxidation line sewage treatment and recycling system, comprising: the system comprises a sewage pretreatment system, an air flotation system, a comprehensive adjusting tank, an ultrafiltration system and a reverse osmosis system; the sewage pretreatment system comprises a sewage collecting tank, a neutralization reaction tank, an inclined tube sedimentation tank, a lifting pump, a diaphragm pump, a first filter press and a return pipe, wherein the lifting pump is arranged between the sewage collecting tank and the neutralization reaction tank, and between the neutralization reaction tank and the inclined tube sedimentation tank; the air floatation system comprises a mixing reactor, a bubble generator, a scraper blade, a mud valve and a second filter press, wherein a lifting pump is arranged between the mixing reactor and the inclined tube sedimentation tank, the bubble generator is arranged in the mixing reactor, the scraper blade is arranged at the top of the mixing reactor, the mud valve is arranged at the bottom of the mixing reactor, and the mud valve is connected with the second filter press through a pipeline; the comprehensive adjusting tank comprises an adjusting tank, a screw pump and a third filter press, the adjusting tank is connected with the mixing reactor, and the adjusting tank is connected with the third filter press through the screw pump; the ultrafiltration system comprises a preposed water tank, a security filter, a pp cloth bag filter, an activated carbon filter, a quartz sand filter, a wire-wound filter element microfiltration filter, an ultrafiltration membrane filter, a primary recycling tank and a lift pump, wherein the lift pump is arranged between the preposed water tank and the regulating tank, between the security filter and the preposed water tank, between the pp cloth bag filter and the activated carbon filter, and between the quartz sand filter and the wire-wound filter element microfiltration filter, all the filters are connected through a pipeline, and the ultrafiltration membrane filter is connected with the primary recycling tank; the reverse osmosis system comprises a high-pressure pump, an R/O membrane reverse osmosis device, a water production pipe, a secondary recycling pool and a lift pump, wherein the lift pump and the high-pressure pump are arranged between the primary recycling pool and the R/O membrane reverse osmosis device, the R/O membrane reverse osmosis device is connected with the water production pipe, and the water production pipe is connected with the secondary recycling pool.

Preferably, in the technical scheme, the anodic oxidation line sewage treatment and recycling system further comprises a concentrated water recycling tank, the concentrated water recycling tank is respectively connected with the ultrafiltration membrane filter and the R/O membrane reverse osmosis device through pipelines, and the sewage collecting tank is connected with the concentrated water recycling tank through a pipeline.

Preferably, in the technical scheme, the sewage treatment and recycling system of the anodic oxidation line further comprises a sludge drying box, the sludge drying box is respectively connected with a first pressure filter, a second pressure filter and a third pressure filter, the sludge drying box comprises a drying chamber, an evaporator, a condenser, a compressor, an electronic expansion valve, a hot dry air passage, a warm and humid air passage, a cold dry air passage, a liquid inlet pipeline and a liquid outlet pipeline, the drying chamber is connected with the condenser through the hot dry air passage, the drying chamber is connected with the evaporator through the warm and humid air passage, the evaporator is connected with the condenser through the cold dry air passage, the evaporator is connected with the condenser through the liquid inlet pipeline and the liquid outlet pipeline, the electronic expansion valve is arranged on the liquid inlet pipeline, and the compressor is arranged on the liquid outlet pipeline.

Compared with the prior art, the utility model has the following beneficial effects:

the collected sewage is pretreated and then subjected to air floatation treatment, then the sewage is mixed and comprehensively regulated in a comprehensive regulating tank, the pressure filtration water is subjected to ultrafiltration and reverse osmosis treatment and then is recycled in production, and concentrated water generated by ultrafiltration and reverse osmosis flows back to the sewage collecting tank. 70-80 tons of sewage can be treated every day to generate 20 tons of ultrapure water, so that the use amount of tap water of an enterprise is greatly reduced, and 70% of water can be saved. And the sludge is dried by adopting a dehumidification heat pump, so that the treatment cost is greatly reduced, and the sludge is convenient to burn and bury.

Description of the drawings:

FIG. 1 is a block diagram of the sewage treatment and recycling system of the anodic oxidation line of the present invention;

FIG. 2 is a schematic structural view of a sludge drying box according to the present invention;

the reference signs are: 1-sewage collection tank, 2-neutralization reaction tank, 3-inclined tube sedimentation tank, 4-lift pump, 5-diaphragm pump, 6-first pressure filter, 7-reflux pipe, 8-mixing reactor, 9-bubble generator, 10-scraper, 11-mud valve, 12-second pressure filter, 13-adjusting tank, 14-screw pump, 15-third pressure filter, 16-preposed water tank, 17-security filter, 18-pp cloth bag filter, 19-active carbon filter, 20-quartz sand filter, 21-wire-wound filter core micro-filtration filter, 22-ultrafiltration membrane filter, 23-first-stage recycling tank, 24-high pressure pump, 25-R/O membrane device, 26-water production pipe, 27-second-stage recycling tank, 28-concentrated water recycling pool, 29-sludge drying box, 290-drying chamber, 291-evaporator, 292-condenser, 293-compressor, 294-electronic expansion valve, 295-hot dry air passage, 296-warm and humid air passage, 297-cold dry air passage, 298-liquid inlet pipeline and 299-liquid outlet pipeline.

The specific implementation mode is as follows:

the following detailed description of specific embodiments of the utility model is provided, but it should be understood that the scope of the utility model is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1-2, an anodic oxidation line sewage treatment recycling system comprises: a sewage pretreatment system, an air flotation system, a comprehensive adjusting tank, an ultrafiltration system, a reverse osmosis system, a concentrated water reuse tank 28 and a sludge drying box 29; the sewage pretreatment system comprises a sewage collecting tank 1, a neutralization reaction tank 2, an inclined tube sedimentation tank 3, a lifting pump 4, a diaphragm pump 5, a first pressure filter 6 and a return pipe 7, wherein the lifting pump 4 is arranged between the sewage collecting tank 1 and the neutralization reaction tank 2, and between the neutralization reaction tank 2 and the inclined tube sedimentation tank 3, the diaphragm pump 5 is arranged between the inclined tube sedimentation tank 3 and the first pressure filter 6, and the first pressure filter 6 is connected with the neutralization reaction tank 2 through the return pipe 7; the air floatation system comprises a mixing reactor 8, a bubble generator 9, a scraper 10, a mud valve 11 and a second filter press 12, wherein a lifting pump 4 is arranged between the mixing reactor 8 and the inclined tube sedimentation tank 3, the bubble generator 9 is arranged in the mixing reactor 8, the scraper 10 is arranged at the top of the mixing reactor 8, the mud valve 11 is arranged at the bottom of the mixing reactor 8, and the mud valve 11 is connected with the second filter press 12 through a pipeline; the comprehensive adjusting tank comprises an adjusting tank 13, a screw pump 14 and a third filter press 15, wherein the adjusting tank 13 is connected with the mixing reactor 8, and the adjusting tank 13 is connected with the third filter press 15 through the screw pump 14; the ultrafiltration system comprises a preposed water tank 16, a security filter 17, a pp cloth bag filter 18, an activated carbon filter 19, a quartz sand filter 20, a wire-wound filter core microfiltration filter 21, an ultrafiltration membrane filter 22, a primary recycling tank 23 and a lift pump 4, wherein the lift pump 4 is arranged between the preposed water tank 16 and an adjusting tank 13, between the security filter 17 and the preposed water tank 16, between the pp cloth bag filter 18 and the activated carbon filter 19, between the quartz sand filter 20 and the wire-wound filter core microfiltration filter 21, all the filters are connected through pipelines, and the ultrafiltration membrane filter 22 is connected with the primary recycling tank 23; the reverse osmosis system comprises a high-pressure pump 24, an R/O membrane reverse osmosis device 25, a water production pipe 26, a secondary recycling tank 27 and a lifting pump 4, wherein the lifting pump 4 and the high-pressure pump 24 are arranged between the primary recycling tank 23 and the R/O membrane reverse osmosis device 25, the R/O membrane reverse osmosis device 25 is connected with the water production pipe 26, and the water production pipe 26 is connected with the secondary recycling tank 27. The concentrated water recycling tank 28 is respectively connected with the ultrafiltration membrane filter 22 and the R/O membrane reverse osmosis device 25 through pipelines, and the sewage collecting tank 1 is connected with the concentrated water recycling tank 28 through a pipeline. The sludge drying box 29 is respectively connected with the first filter press 6, the second filter press 12 and the third filter press 15, the sludge drying box 29 comprises a drying chamber 290, an evaporator 291, a condenser 292, a compressor 293, an electronic expansion valve 294, a hot dry air passage 295, a warm and humid air passage 296, a cold dry air passage 297, a liquid inlet pipeline 298 and a liquid outlet pipeline 299, the drying chamber 290 is connected with the condenser 292 through the hot dry air passage 295, the drying chamber 290 is connected with the evaporator 291 through the warm and humid air passage 296, the evaporator 291 is connected with the condenser 292 through the cold dry air passage 297, the evaporator 291 is connected with the condenser 292 through the liquid inlet pipeline 298 and the liquid outlet pipeline 299, the electronic expansion valve 294 is arranged on the liquid inlet pipeline 298, and the compressor 293 is arranged on the liquid outlet pipeline 299.

Firstly, collecting wastewater in a sewage collecting tank 1, lifting the collected wastewater to a neutralization reaction tank 2 by a lifting pump 4 after the collected wastewater reaches a treatment capacity, adding lime slurry prepared by quick lime into the neutralization reaction tank 2 and stirring, then inputting mixed liquid into an inclined tube sedimentation tank 3 by the lifting pump 4, adding NaOH solution into the inclined tube sedimentation tank 3, adjusting the pH value of the liquid to about 8, inputting sediment at the lower layer of the inclined tube sedimentation tank 3 into a first filter press 6 through a diaphragm pump 5 for filter pressing treatment, inputting filtrate into the neutralization reaction tank 2 through a return pipe 7, and inputting sludge into a sludge drying box 29. Supernatant of the inclined tube sedimentation tank 3 is input into a mixing reactor 8 through a lifting pump 4, a degreasing agent or a coagulant is added into the mixing reactor 8 to form separable flocs, a bubble generator 9 releases micro bubbles (the diameter range of the bubbles is 30-50 um), and the micro bubbles are adhered to the flocs in water to form an air floating body with specific gravity smaller than that of the water. The air floating body rises to the water surface and is condensed into floating oil or floating slag which is scraped by the scraper 10. The heavier solid particles are precipitated to the bottom of the mixing reactor 8, and are discharged into a second filter press 12 by periodically opening a sludge discharge valve 11 for filter pressing, and the sludge is input into a sludge drying box 29. The clear water at the upper part in the mixing reactor 8 flows into the regulating tank 13 for regulating again.

PAC is added into the regulating tank 13 to destabilize and aggregate fine suspended particles and colloidal ions in water, PAM is added to form large particles, sewage is pumped into a third filter press 15 by a screw pump 14 to be filter-pressed, and sludge is input into a sludge drying box 29. The method comprises the steps that filter-pressed clean water is lifted to a front water tank 16 by a lifting pump 4 to be temporarily stored, the water in the front water tank 16 is pumped into a security filter 17 by the lifting pump 4 to be roughly filtered, impurities with the size of more than 10 micrometers are filtered, then the roughly filtered water is sequentially pp a cloth bag filter 18, an active carbon filter 19, a quartz sand filter 20 and a wire-wound filter element microfiltration filter 21 to be subjected to microfiltration, the filter element aperture of the wire-wound filter element microfiltration filter 21 is not more than 0.1 micrometer, free chlorine in the water is removed by the active carbon filter 19, the micro-filtered water enters an ultrafiltration membrane filter 22, the filter element aperture of the ultrafiltration membrane filter 22 is less than 1nm, the clean water filtered by the ultrafiltration membrane filter 22 enters a primary recycling pool 23, concentrated water generated after being filtered by the ultrafiltration membrane filter 22 flows into a concentrated water recycling pool 28, and the ultrafiltration system outputs 7 tons of clean water per hour, the concentrated water is 2.1 ton, and the recovery rate is 70%. The water quality COD (mg/l) in the first-level recycling pool 23 is less than or equal to 120, SS (mg/l) is less than or equal to 30, petroleum (mg/l) is less than or equal to 2, pH is 6-9, and conductivity (mu s/cm) is less than or equal to 3000 at 25 ℃.

Clear water in the primary recycling tank 23 is input into a high-pressure pump 24 through a lifting pump 4, the clear water is pumped into an R/O membrane reverse osmosis device 25 through the high-pressure pump 24, inorganic salt in the clear water is removed in the R/O membrane reverse osmosis device 25, the clear water filtered by the R/O membrane reverse osmosis device 25 enters a secondary recycling tank 27 through a water production pipe 26, concentrated water flows into a concentrated water recycling tank 28, the clear water is discharged by the reverse osmosis system for 5 tons per hour, the concentrated water is 2 tons, and the recovery rate is 60%. The water quality COD (mg/l) in the secondary recycling pool 27 is less than or equal to 50, SS (mg/l) is less than or equal to 30, petroleum (mg/l) is less than or equal to 2, pH is 6-9, and the conductivity (mu s/cm) is less than or equal to 600 at 25 ℃.

The sewage treatment and recycling system of the anodic oxidation line can treat 70-80 tons of sewage every day to generate 20 tons of ultrapure water, thereby greatly reducing the using amount of tap water of enterprises and saving water by 70 percent.

And (3) drying the water-containing sludge by dry and hot air at 65 ℃ in the drying chamber 290 to reduce the water content of the sludge to 30%, wherein the sludge is loose and granular in appearance, good in bearing capacity, less in peculiar smell and good in hydrophobicity, and can be conveniently incinerated and buried.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the utility model and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the utility model and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.

Claims (3)

1. The utility model provides an anodic oxidation line sewage treatment recycling system which characterized in that: comprises a sewage pretreatment system, an air flotation system, a comprehensive adjusting tank, an ultrafiltration system and a reverse osmosis system; the sewage pretreatment system comprises a sewage collecting tank, a neutralization reaction tank, an inclined tube sedimentation tank, a lifting pump, a diaphragm pump, a first filter press and a return pipe, wherein the lifting pump is arranged between the sewage collecting tank and the neutralization reaction tank, and between the neutralization reaction tank and the inclined tube sedimentation tank; the air floatation system comprises a mixing reactor, a bubble generator, a scraper blade, a mud valve and a second filter press, wherein a lifting pump is arranged between the mixing reactor and the inclined tube sedimentation tank, the bubble generator is arranged in the mixing reactor, the scraper blade is arranged at the top of the mixing reactor, the mud valve is arranged at the bottom of the mixing reactor, and the mud valve is connected with the second filter press through a pipeline; the comprehensive adjusting tank comprises an adjusting tank, a screw pump and a third filter press, the adjusting tank is connected with the mixing reactor, and the adjusting tank is connected with the third filter press through the screw pump; the ultrafiltration system comprises a preposed water tank, a security filter, a pp cloth bag filter, an activated carbon filter, a quartz sand filter, a wire-wound filter element microfiltration filter, an ultrafiltration membrane filter, a primary recycling tank and a lift pump, wherein the lift pump is arranged between the preposed water tank and the regulating tank, between the security filter and the preposed water tank, between the pp cloth bag filter and the activated carbon filter, and between the quartz sand filter and the wire-wound filter element microfiltration filter, all the filters are connected through a pipeline, and the ultrafiltration membrane filter is connected with the primary recycling tank; the reverse osmosis system comprises a high-pressure pump, an R/O membrane reverse osmosis device, a water production pipe, a secondary recycling pool and a lift pump, wherein the lift pump and the high-pressure pump are arranged between the primary recycling pool and the R/O membrane reverse osmosis device, the R/O membrane reverse osmosis device is connected with the water production pipe, and the water production pipe is connected with the secondary recycling pool.

2. The sewage treatment and recycling system of an anodic oxidation line according to claim 1, characterized in that: the sewage treatment and recycling system of the anodic oxidation line further comprises a concentrated water recycling tank, the concentrated water recycling tank is respectively connected with the ultrafiltration membrane filter and the R/O membrane reverse osmosis device through pipelines, and the sewage collecting tank is connected with the concentrated water recycling tank through a pipeline.

3. The sewage treatment and recycling system of an anodic oxidation line according to claim 1, characterized in that: anodic oxidation line sewage treatment recycling system still includes mud stoving case, mud stoving case respectively with the pressure filter, No. two pressure filters, No. three pressure filters are connected, mud stoving case includes the drying chamber, the evaporimeter, the condenser, a compressor, electronic expansion valve, hot dry air flue, warm and humid air flue, cold dry air flue, the inlet fluid pipeline, the drain pipe, the drying chamber passes through hot dry air flue and is connected with the condenser, the drying chamber passes through warm and humid air flue and is connected with the evaporimeter, be connected through cold dry air flue between evaporimeter and condenser, respectively pass through the inlet fluid pipeline between evaporimeter and condenser, the drain pipe is connected, be provided with electronic expansion valve on the inlet fluid pipeline, be provided with the compressor on the drain pipe.

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