CN220125698U - Membrane filtration treatment equipment for treating coating waste solvent - Google Patents
Membrane filtration treatment equipment for treating coating waste solvent Download PDFInfo
- Publication number
- CN220125698U CN220125698U CN202320434275.0U CN202320434275U CN220125698U CN 220125698 U CN220125698 U CN 220125698U CN 202320434275 U CN202320434275 U CN 202320434275U CN 220125698 U CN220125698 U CN 220125698U
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- CN
- China
- Prior art keywords
- reverse osmosis
- osmosis membrane
- filter
- pump
- tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010887 waste solvent Substances 0.000 title claims abstract description 21
- 238000005374 membrane filtration Methods 0.000 title claims abstract description 13
- 239000011248 coating agent Substances 0.000 title claims abstract description 11
- 238000000576 coating method Methods 0.000 title claims abstract description 11
- 239000012528 membrane Substances 0.000 claims abstract description 26
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 24
- 239000003973 paint Substances 0.000 claims abstract description 15
- 238000011001 backwashing Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 23
- 239000002904 solvent Substances 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000000306 component Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model provides a membrane filtration treatment device for treating coating waste solvent, comprising: the device comprises a primary filter, a paint supply pump, a secondary filter, two centrifugal pumps and an RO reverse osmosis membrane which are sequentially connected, wherein a 5-micrometer filter bag is arranged in the primary filter, a 10-nanometer filter bag is arranged in the secondary filter, RO reverse osmosis membrane filtration is respectively connected with a clear solution tank, a backwashing tank and a heat exchanger, the backwashing tank is connected with the RO reverse osmosis membrane through the centrifugal pump, the heat exchanger is connected with a raw solution tank, the raw solution tank is connected with a concentrated solution tank, and the RO reverse osmosis membrane is also connected with the secondary filter through the paint supply pump; the utility model has the advantages that: paint supply pressure was shared by using two centrifugal pumps instead of a plunger diaphragm pump. The centrifugal pump uses the impeller to replace the diaphragm and the one-way valve component, so that the defect that the diaphragm material has strong solvent resistance but poor elasticity is overcome; the check valve structure is eliminated, the defect that the check valve is poor in Gao Surong agent impact resistance and concave is formed is overcome, and the abrasion problem caused by impact of hard particles on components of the pump body is effectively reduced.
Description
Technical Field
The utility model relates to the technical field of coating, in particular to membrane filtration treatment equipment for treating a waste coating solvent.
Background
The coating line generates a large amount of waste solvent in the processes of robot gun washing, paint mixing, tank washing, spot repairing gun washing and the like, the waste solvent accounts for the second position in all wastes of a factory, the dangerous waste treatment of the waste solvent needs to be high in cost, and meanwhile, the effective components contained in the waste solvent are not recycled, so that the resource waste is caused, and the purchasing cost of the cleaning solvent cannot be reduced.
Most of the waste solvents in the market at present adopt a distillation method, but the following defects exist when the distillation method is adopted for recycling the waste solvents: 1) The safety is low, and the device is inflammable and explosive; 2) The high boiling point components in the raw liquid formula can not be recovered due to the limitation of the boiling point temperature in the recovered solvent, so that the recovered solvent is required to be blended with the raw liquid for use when being reused, and the use economy is reduced and the limitation is caused; 3) The recovery rate is low, only 50-60%, and part of impurities exist in the recovery liquid; 4) The equipment has high energy consumption (20 KW) and is not easy to maintain and use in later period.
Some RO membrane filtration methods are used for treating waste solvents in the market, but the current RO membrane filtration methods have the problem of low service life of the filtering equipment, because the core component of the membrane filtration treatment equipment is an RO reverse osmosis membrane which can filter and treat solvents with molecular weight of 100-200. However, the 10-micron filter bag used in the primary filtration of the raw solution tank before the RO reverse osmosis membrane can not sufficiently filter macromolecular substances such as resin, pigment and the like in the waste solvent, and the waste solvent causes the problem of high blocking frequency of the 5-micron filter bag when entering the secondary filtration, so that the running cost of equipment is increased.
Disclosure of Invention
In view of the above problems, it is an object of the present utility model to provide a membrane filtration treatment apparatus for treating a coating waste solvent, for prolonging the service life of the filtration apparatus, so as to overcome the above-described drawbacks of the prior art.
The utility model provides a membrane filtration treatment device for treating coating waste solvent, which comprises: the device comprises a primary filter, a paint supply pump, a secondary filter, two centrifugal pumps and an RO reverse osmosis membrane, wherein the primary filter, the paint supply pump, the secondary filter and the RO reverse osmosis membrane are sequentially connected, a 5-micron filter bag is arranged in the primary filter, a 10-nanometer filter bag is arranged in the secondary filter, the RO reverse osmosis membrane is respectively connected with a clean liquid tank, a backwashing tank and a heat exchanger, the backwashing tank is connected with the RO reverse osmosis membrane through the centrifugal pump, the heat exchanger is connected with the raw liquid tank, the raw liquid tank is connected with a concentrated liquid tank, and the RO reverse osmosis membrane is also connected with the secondary filter through the paint supply pump.
And a three-piece type welded ball valve is additionally arranged at the outlet position of the RO reverse osmosis membrane.
The utility model has the advantages and positive effects that:
1. the utility model uses two centrifugal pumps to replace a plunger diaphragm pump to share paint supply pressure (20 bar/platform). The centrifugal pump uses the impeller (304 stainless steel) to replace the diaphragm (polytetrafluoroethylene), so that the defects of strong solvent resistance but poor elasticity of the diaphragm material are overcome; the check valve structure is eliminated, the defect that the check valve is poor in Gao Surong agent impact resistance and concave is formed is avoided, and the abrasion problem caused by hard particles impacting pump body components is effectively reduced.
2. The utility model adjusts the size of the filter bag used for the primary filter of the equipment to 5 micrometers, and the filter bag used for the secondary filter to 10 micrometers is adjusted by changing, so that the problem of blockage of the secondary filter bag is effectively solved, the service life of the filter bag used for the primary filter 5 micrometers is 10 days, and the service life of the filter bag used for the secondary filter 10 micrometers is prolonged from 1-2 days to 20 days.
3. The utility model increases the impact resistance of the valve to high-flow-rate liquid by adding the three-piece type welded ball valve.
Drawings
Fig. 1 is a flow chart of the present utility model.
Reference numerals: a primary filter 1, a paint supply pump 2, a secondary filter 3, a centrifugal pump 4, an RO reverse osmosis membrane 5, a clear liquid tank 6, a backwashing tank 7, a heat exchanger 8, a raw liquid tank 9 and a concentrated liquid tank 10.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
Referring to fig. 1, the membrane filtration treatment apparatus for treating coating waste solvent provided in this embodiment includes: the device comprises a primary filter 1, a paint supply pump 2, a secondary filter 3, two centrifugal pumps (booster pumps) 4 and RO reverse osmosis membranes 5 which are connected in sequence, wherein a 5-micrometer filter bag is arranged in the primary filter 1, a 10-nanometer filter bag is arranged in the secondary filter 3, the RO reverse osmosis membranes 5 are respectively connected with a clear liquid tank 6, a backwashing tank 7 and a heat exchanger 8, the backwashing tank 7 is connected with the RO reverse osmosis membranes 5 through the centrifugal pumps 4, the heat exchanger 8 is connected with a raw liquid tank 9, the raw liquid tank 9 is connected with a concentrated liquid tank 10, and the device is also connected with the secondary filter 3 through the paint supply pump 2. And a three-piece type welded ball valve is additionally arranged at the outlet position of the RO reverse osmosis membrane 5.
In this embodiment, the RO reverse osmosis membrane 5 can filter 100-200 molecular weight solvents, small molecular weight solvent components (alcohols, butyl acetate, ketones, benzene, etc.) permeate the membrane to form clean recovery liquid (75% in ratio) under high pressure (25-30 bar) of the equipment, and large molecular weight substances such as resin, effect pigment, color paste, etc. contained in the waste solvent are trapped by the membrane to form concentrated liquid to be scrapped (25% in ratio).
Working principle: the equipment treatment process comprises three-stage filtration of the waste solvent liquid, namely, the primary filtration is carried out by using a 5-micrometer primary filter 1 in a raw solution tank added with the waste solvent, the 10-micrometer filtration is carried out by using a secondary filter 3 after a paint supply pump 2, the filtration (100-200 molecular weight) is carried out by using an RO reverse osmosis membrane 5 after a centrifugal pump (a pump is added) 4, and the waste solvent is converted into clean recovery liquid for on-site use through the filtration treatment.
The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (2)
1. A membrane filtration treatment apparatus for treating a coating waste solvent, comprising: the device comprises a primary filter, a paint supply pump, a secondary filter, two centrifugal pumps and an RO reverse osmosis membrane, wherein the primary filter, the paint supply pump, the secondary filter and the RO reverse osmosis membrane are sequentially connected, a 5-micron filter bag is arranged in the primary filter, a 10-nanometer filter bag is arranged in the secondary filter, the RO reverse osmosis membrane is respectively connected with a clean liquid tank, a backwashing tank and a heat exchanger, the backwashing tank is connected with the RO reverse osmosis membrane through the centrifugal pump, the heat exchanger is connected with the raw liquid tank, the raw liquid tank is connected with a concentrated liquid tank, and the RO reverse osmosis membrane is also connected with the secondary filter through the paint supply pump.
2. The membrane filtration treatment apparatus for treating a coating waste solvent according to claim 1, wherein a three-piece type welded ball valve is added to an outlet position of the RO membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320434275.0U CN220125698U (en) | 2023-03-09 | 2023-03-09 | Membrane filtration treatment equipment for treating coating waste solvent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320434275.0U CN220125698U (en) | 2023-03-09 | 2023-03-09 | Membrane filtration treatment equipment for treating coating waste solvent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220125698U true CN220125698U (en) | 2023-12-05 |
Family
ID=88952242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320434275.0U Active CN220125698U (en) | 2023-03-09 | 2023-03-09 | Membrane filtration treatment equipment for treating coating waste solvent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220125698U (en) |
-
2023
- 2023-03-09 CN CN202320434275.0U patent/CN220125698U/en active Active
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| GR01 | Patent grant |