CN110482823A - A kind of flash baking method of electroplating sludge - Google Patents

A kind of flash baking method of electroplating sludge Download PDF

Info

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.)
Pending
Application number
CN201910696159.4A
Other languages
Chinese (zh)
Inventor
石勇
杨洋
孙亚辉
伏志省
徐冬
陈鑫
查淦峰
昝燕飞
黄建阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHAANXI FUTIANBAO ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Original Assignee
SHAANXI FUTIANBAO ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHAANXI FUTIANBAO ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd filed Critical SHAANXI FUTIANBAO ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Priority to CN201910696159.4A priority Critical patent/CN110482823A/en
Publication of CN110482823A publication Critical patent/CN110482823A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • C02F11/131Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating using electromagnetic or ultrasonic waves
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/148Combined use of inorganic and organic substances, being added in the same treatment step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16Nature 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

A kind of flash baking method of electroplating sludge
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%.
CN201910696159.4A 2019-07-30 2019-07-30 A kind of flash baking method of electroplating sludge Pending CN110482823A (en)

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

Country Status (1)

Country Link
CN (1) CN110482823A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JP2013059765A (en) Sludge concentration and dehydration method
CN102153217B (en) Electroplating integrated wastewater treatment method
CN110241308B (en) Method and system for recovering tin metal in nitric acid type tin stripping wastewater
CN102489406A (en) Method for treating sulfur bauxite
CN103172094A (en) Method for using waste aluminum ash and waste acid without causing pollution to environment
WO2017080164A1 (en) Electroplating waste water processing process
CN105296704A (en) Treatment system and process of applying sintering flue gas to dust removal water of converter
CN103755075A (en) Technical method for treating silicon carbide acidic wastewater
CN110482823A (en) A kind of flash baking method of electroplating sludge
CN109336236A (en) A kind of method that red mud prepares ferro-aluminum flocculant
CN104148190A (en) Method for making high-grade powdered iron through high-sulfur and low-grade sulfuric acid residues
CN101239760A (en) Pretreatment technique for industrial bean clear water
CN107140718A (en) A kind of utilize couples the method that external field treatment red mud prepares iron aluminium flocculating agent
CN110655290B (en) Coal mine wastewater treatment method
CN108373249B (en) Resource utilization method and treatment system for high-chlorine iron-containing waste sludge
CN105152195A (en) Treatment method and apparatus for controlled filter cakes in Bayer process for alumina production
CN106191453A (en) A kind of rotary hearth furnace dirt ash is utilized to reclaim zinc enriched substance and the method for potassium chloride
CN102863130A (en) Method for treating activated sludge
CN104711428A (en) Method for preparing and recovering noble metal in pickling sludge
CN112723688B (en) Red mud dealkalization technology
CN112174400A (en) Novel processing system of old and useless emulsion
RO131973B1 (en) Process for selective recovery of chromium, iron and zinc from sludges resulting from metal coating, to obtain useful compounds
JP2013023720A (en) Method of reusing wet dust present in material generated in blast furnace
CN101407365A (en) Method for processing chroming waste liquor
CN206828586U (en) A kind of system that metallized pellet is prepared using red mud

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination