CN110482823A - A kind of flash baking method of electroplating sludge - Google Patents
A kind of flash baking method of electroplating sludge Download PDFInfo
- Publication number
- CN110482823A CN110482823A CN201910696159.4A CN201910696159A CN110482823A CN 110482823 A CN110482823 A CN 110482823A CN 201910696159 A CN201910696159 A CN 201910696159A CN 110482823 A CN110482823 A CN 110482823A
- Authority
- CN
- China
- Prior art keywords
- sludge
- electroplating
- electroplating sludge
- flash baking
- baking method
- 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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Links
- 239000010802 sludge Substances 0.000 title claims abstract description 64
- 238000009713 electroplating Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 19
- 238000005189 flocculation Methods 0.000 claims abstract description 7
- 230000016615 flocculation Effects 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 229920002401 polyacrylamide Polymers 0.000 claims description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000002161 passivation Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
- C02F11/131—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating using electromagnetic or ultrasonic waves
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention provides a kind of flash baking method of electroplating sludge, the described method comprises the following steps: flocculation, mechanical stripping and slicing, microwave drying；The electroplating sludge moisture content obtained using the flash baking method of electroplating sludge of the invention is low, and the thermal efficiency is high, and low energy consumption, during the drying process without dust, is suitble to Large scale processes application.
Description
Technical field
The invention belongs to environmental technology field, in particular to the flash baking method of a kind of electroplating sludge.
Background technique
The basic processing industry important as China is electroplated, a large amount of waste water can be generated in the plating process, be electroplated
In the treatment process of waste water, a large amount of heavy metal (copper, chromium, nickel, zinc etc.) can enter in sludge in waste water, contain in electroplating sludge
A large amount of heavy metal is listed in National Hazard waste, and about 8,000,000 t dry weight of China's sludge annual output (is converted into wet cake 3200 at present
Ten thousand t), and with the speed increase of annual 10%-15%.
Currently, traditional electroplating sludge often includes the technologies such as solidification, landfill and recycling valuable metal with processing method, it is valuable
The recovery method of metal mainly has pyrogenic process refinement and wet-leaching, wherein leaching agent includes acid, alkali, salt etc., the money of electroplating sludge
Source and harmless treatment, it has also become environment protection field one of problem urgently to be resolved at present.
In order to reduce the stacking occupied area of sludge, convenient transportation, electroplating sludge usually needs to dry before factory, conventional
Drying equipment be hollow blade dryer device, internal usually setting stirring slurry, wet stock under the agitation of blade, by with
Heat carrier contacts and removes free water therein, and there are two drawbacks for this furnace drying method, and first is exactly material stirring in blade
Often have a large amount of dust under dynamic, operating environment is more severe, second drawback be exactly the moisture content of material after drying still
It is higher, between 20%-40%, for this purpose, the present invention proposes a kind of flash baking method of electroplating sludge.
Summary of the invention
Of the existing technology in order to solve the problems, such as, the present invention provides a kind of flash baking methods of electroplating sludge, adopt
The electroplating sludge moisture content obtained with the flash baking method of electroplating sludge of the invention is low, and the thermal efficiency is high, and low energy consumption, is drying
In the process without dust, it is suitble to Large scale processes application.
To achieve the goals above, the present invention is to realize by the following technical solutions: a kind of electroplating sludge it is quick
Furnace drying method the described method comprises the following steps:
Step 1: flocculation；Electroplating wastewater is subjected to flocculation treatment, specific steps are as follows: sodium hydroxide is added or potassium hydroxide is adjusted
The pH value of waste water is continuously added into PAC and PAM, until the sludge formation alumen ustum in waste water, accelerates the sedimentation of sludge, dirt to 7-12
Mud is discharged into sludge concentration tank by pipeline, press dry muddy water with filter press, the electroplating sludge of mud cake shape is obtained after mud-water separation；
Step 2: the mud cake shape electroplating sludge that step 1 is obtained carries out mechanical stripping and slicing, by crusher by the plating of mud cake shape
Sludge breaks the sludge of frustillatum；
Step 3: microwave drying；The blocky electroplating sludge that step 2 is obtained is delivered to microwave heating by material transmission system
Intracavitary carry out microwave drying.
As a kind of preferred embodiment of the invention, the electroplating wastewater in the step 1 includes but are not limited to that preceding place is electroplated
Manage waste water or tank liquor, zinc-plated rinse water or tank liquor, passivation rinse water or tank liquor, closing rinse water or tank liquor.
As a kind of preferred embodiment of the invention, the PAC in the step 1 is aluminium polychloride, and PAM is polyacrylamide
Amine.
As a kind of preferred embodiment of the invention, the mass fraction of PAC is 0.1%-1%, the concentration of PAM in the step 1
For 1ppm-10ppm.
As a kind of preferred embodiment of the invention, blocky electroplating sludge is in the intracavitary stop of microwave heating in the step 3
Between control in 0.1h-2h, the electroplating sludge moisture content dried can be controlled in 1%-15%.
Beneficial effects of the present invention:
1, the characteristic of microwave heating is utilized in a kind of flash baking method of electroplating sludge of the invention, passes through the strong infiltration of electromagnetic wave
Permeability directly heats inside sludge, and drying sludge is fast, broken without stirring, and the sludge after drying is still bulk, with conventional drying
Method is compared, and microwave drying is mainly there are three advantage, and first exactly to dry obtained moisture percentage in sewage sludge low, 20% hereinafter, one
As can reach 2% hereinafter, second advantage is in microwave drying process that sludge is not in powder in heating process without stirring
Dirt, work situation is good, and third advantage is that microwave heating directly acts on inside material, and addition is high-efficient, and low energy consumption, this hair
The flash baking method of the electroplating sludge of bright proposition, productivity effect is good, is suitble to Large scale processes application.
2, the electroplating sludge moisture content obtained using the flash baking method of electroplating sludge of the invention is low, and the thermal efficiency is high,
Low energy consumption, during the drying process without dust, is suitble to Large scale processes application.
3, the present invention provides a kind of high-efficient, at low cost, easy to use, environmental-friendly electroplating sludge flash baking sides
Method.
Detailed description of the invention
Fig. 1 is the flow chart of a kind of flash baking method of electroplating sludge.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of flash baking method of electroplating sludge, the method
The following steps are included:
Step 1: flocculation；Electroplating wastewater is subjected to flocculation treatment, specific steps are as follows: sodium hydroxide is added or potassium hydroxide is adjusted
The pH value of waste water is continuously added into PAC and PAM, until the sludge formation alumen ustum in waste water, accelerates the sedimentation of sludge, dirt to 7-12
Mud is discharged into sludge concentration tank by pipeline, press dry muddy water with filter press, the electroplating sludge of mud cake shape is obtained after mud-water separation；
Step 2: the mud cake shape electroplating sludge that step 1 is obtained carries out mechanical stripping and slicing, by crusher by the plating of mud cake shape
Sludge breaks the sludge of frustillatum；
Step 3: microwave drying；The blocky electroplating sludge that step 2 is obtained is delivered to microwave heating by material transmission system
Intracavitary carry out microwave drying.
As a kind of preferred embodiment of the invention, the electroplating wastewater in the step 1 includes but are not limited to that preceding place is electroplated
Manage waste water or tank liquor, zinc-plated rinse water or tank liquor, passivation rinse water or tank liquor, closing rinse water or tank liquor.
As a kind of preferred embodiment of the invention, the PAC in the step 1 is aluminium polychloride, and PAM is polyacrylamide
Amine.
As a kind of preferred embodiment of the invention, the mass fraction of PAC is 0.1%-1%, the concentration of PAM in the step 1
For 1ppm-10ppm.
As a kind of preferred embodiment of the invention, blocky electroplating sludge is in the intracavitary stop of microwave heating in the step 3
Between control in 0.1h-2h, the electroplating sludge moisture content dried can be controlled in 1%-15%.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or
In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention
It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of flash baking method of electroplating sludge, which is characterized in that the described method comprises the following steps:
Step 1: flocculation；Electroplating wastewater is subjected to flocculation treatment, specific steps are as follows: sodium hydroxide is added or potassium hydroxide is adjusted
The pH value of waste water is continuously added into PAC and PAM, until the sludge formation alumen ustum in waste water, accelerates the sedimentation of sludge, dirt to 7-12
Mud is discharged into sludge concentration tank by pipeline, press dry muddy water with filter press, the electroplating sludge of mud cake shape is obtained after mud-water separation；
Step 2: the mud cake shape electroplating sludge that step 1 is obtained carries out mechanical stripping and slicing, by crusher by the plating of mud cake shape
Sludge breaks the sludge of frustillatum；
Step 3: microwave drying；The blocky electroplating sludge that step 2 is obtained is delivered to microwave heating by material transmission system
Intracavitary carry out microwave drying.
2. a kind of flash baking method of electroplating sludge according to claim 1, which is characterized in that in the step 1
Electroplating wastewater include but are not limited to pre-electroplating treatment waste water or tank liquor, zinc-plated rinse water or tank liquor, passivation rinse water or tank liquor,
Close rinse water or tank liquor.
3. a kind of flash baking method of electroplating sludge according to claim 1, which is characterized in that in the step 1
PAC is aluminium polychloride, and PAM is polyacrylamide.
4. a kind of flash baking method of electroplating sludge according to claim 1, which is characterized in that in the step 1
The mass fraction of PAC is 0.1%-1%, and the concentration of PAM is 1ppm-10ppm.
5. a kind of flash baking method of electroplating sludge according to claim 1, which is characterized in that block in the step 3
In the intracavitary residence time control of microwave heating in 0.1h-2h, the electroplating sludge moisture content dried can be controlled shape electroplating sludge
System is in 1%-15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696159.4A CN110482823A (en) | 2019-07-30 | 2019-07-30 | A kind of flash baking method of electroplating sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696159.4A CN110482823A (en) | 2019-07-30 | 2019-07-30 | A kind of flash baking method of electroplating sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110482823A true CN110482823A (en) | 2019-11-22 |
Family
ID=68548787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910696159.4A Pending CN110482823A (en) | 2019-07-30 | 2019-07-30 | A kind of flash baking method of electroplating sludge |
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| Country | Link |
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| CN (1) | CN110482823A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113402061A (en) * | 2021-06-23 | 2021-09-17 | 湖北富邦科技股份有限公司 | Production method for accelerating carbon dioxide trapping product of nanofiltration seawater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015096536A1 (en) * | 2013-12-27 | 2015-07-02 | 中国科学院过程工程研究所 | Method for removing cyanide in wastewater by recycling electroplating sludge |
| CN107034357A (en) * | 2017-04-10 | 2017-08-11 | 郭聪 | A kind of processing method of electroplating sludge comprehensive utilization of resources |
| CN108503003A (en) * | 2018-04-13 | 2018-09-07 | 广州微碳科技有限公司 | The quick drying and other treatment technique of sewage sludge based on microwave-polarizable medium substance |
| CN110015777A (en) * | 2019-03-14 | 2019-07-16 | 陕西福天宝环保科技有限公司 | A method of removal electroplating wastewater COD |
-
2019
- 2019-07-30 CN CN201910696159.4A patent/CN110482823A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015096536A1 (en) * | 2013-12-27 | 2015-07-02 | 中国科学院过程工程研究所 | Method for removing cyanide in wastewater by recycling electroplating sludge |
| CN107034357A (en) * | 2017-04-10 | 2017-08-11 | 郭聪 | A kind of processing method of electroplating sludge comprehensive utilization of resources |
| CN108503003A (en) * | 2018-04-13 | 2018-09-07 | 广州微碳科技有限公司 | The quick drying and other treatment technique of sewage sludge based on microwave-polarizable medium substance |
| CN110015777A (en) * | 2019-03-14 | 2019-07-16 | 陕西福天宝环保科技有限公司 | A method of removal electroplating wastewater COD |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113402061A (en) * | 2021-06-23 | 2021-09-17 | 湖北富邦科技股份有限公司 | Production method for accelerating carbon dioxide trapping product of nanofiltration seawater |
| CN113402061B (en) * | 2021-06-23 | 2023-01-24 | 湖北富邦科技股份有限公司 | Production method for accelerating carbon dioxide capture by nanofiltration seawater |
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