CN107300184B - The method of PCB useless film slag and waste active carbon Combined Treatment - Google Patents
The method of PCB useless film slag and waste active carbon Combined Treatment Download PDFInfo
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- CN107300184B CN107300184B CN201710601151.6A CN201710601151A CN107300184B CN 107300184 B CN107300184 B CN 107300184B CN 201710601151 A CN201710601151 A CN 201710601151A CN 107300184 B CN107300184 B CN 107300184B
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- pcb
- film slag
- active carbon
- waste active
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/02—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of bagasse, megasse or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/70—Blending
- F23G2201/702—Blending with other waste
Abstract
The present invention provides a kind of PCB method for giving up film slag and waste active carbon Combined Treatment comprising following steps: A. is filtered processing to the PCB film slag that gives up, to reduce its moisture content；B. the useless film slag of the filtered PCB is placed in blender, waste active carbon is added and is simultaneously stirred, the useless film slag surface the PCB is made to adhere to the waste active carbon；C. the useless film slag of PCB of the attachment waste active carbon is dried in vacuo, and collects the condensate liquid and incoagulable gas generated in drying process；D. the PCB after the drying is given up into film slag as the fuel of incinerator and carries out burning disposal；The condensate liquid discharges after carrying out biochemical treatment；The incoagulable gas, which is imported into incinerator, makes the PCB give up film slag full combustion.The problem of present invention can quickly reduce useless film slag moisture content, improve calorific value, reduce and burn energy consumption and processing cost, while it is small also to solve waste active carbon granularity, the bad charging of burning disposal, directly burn easy detonation.
Description
Technical field
The present invention relates to the sides of useless film residues processing technique more particularly to a kind of PCB useless film slag and waste active carbon Combined Treatment
Method.
Background technique
In recent years, information, communication, automobile and consumer electrical product manufacturing industry have become the fastest production of whole world growth
One of industry promotes global printed wiring board (Printed Circuit Board, abbreviation PCB) output value to increase year by year.
Largely useless film slag can be generated in PCB circuit board production process, the film slag that gives up is in strong basicity and high chemical oxygen demand
The characteristics of (Chemical Oxygen Demand, abbreviation COD), wherein a large amount of containing polyethylene film, photosensitive resin and polyester etc.
Organic matter, moisture content are up to 65% or more, and dyestuff, coating waste (HW12) subitem are belonged in National Hazard waste register.
Since PCB gives up, film slag viscosity is larger, water penetration is poor, crusts through sunning and natural air drying rear surface, and internal moisture still can not
Volatilization, moisture content reduction amount are limited.The general processing mode of PCB enterprise is the enviromental protection enterprise that directly commission has HW12 class to handle qualification
Processing, and the treatment process of mainstream is high temperature incineration.
But film slag is low with stronger corrosivity, moisture content height, calorific value, and the characteristics such as nonflammable are being burned since PCB gives up
It needs to add a large amount of fuel oil in treatment process, leads to steeply rising for processing cost, additionally due to water content is high, serious shadow
The normal operation for ringing burning facility, needs to arrange in pairs or groups siccative to cause treating capacity to substantially reduce into the moisture content of furnace material.
Active carbon has huge specific surface and complicated pore structure, since there is absorption to make for these surfaces and hole
With active carbon is widely used in exhaust-gas treatment field.Adsorption treatment volatile organic matter (volatile Organic
Compounds, VOCs) after waste active carbon because contain a large amount of harmful substance due to be eliminated, generally using high temperature incineration handle,
But the bad charging in 300 mesh or so, burning of waste active carbon powder diameter is easy fugitive dust, causes secondary pollution, furthermore directly burns
It is also easy to produce deflagration phenomenon, there is certain risk.
This two classes waste is all made of high temperature incineration processing, but has certain processing difficulty, needs to solve in treatment process
Some problems, do not have preferable processing method yet at present.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide one kind can quickly reduce useless film slag moisture content, mentions
High heating value reduces and burns energy consumption and processing cost, more environmentally-friendly useless film Slag treatment method of disposal, while also solving at VOCs
Reason is small with waste active carbon granularity, the bad charging of burning disposal, directly burns the problems such as being easy detonation.
The present invention provides the method for a kind of PCB useless film slag and waste active carbon Combined Treatment, includes the following steps:
A. processing is filtered to the PCB film slag that gives up, to reduce its moisture content；
B. the useless film slag of the filtered PCB is placed in blender, waste active carbon is added and is simultaneously stirred, made described
PCB is useless, and the waste active carbon is adhered on film slag surface；
C. by it is described attachment waste active carbon PCB give up film slag be dried in vacuo, and collect generated in drying process it is cold
Lime set and incoagulable gas；
D. the PCB after the drying is given up into film slag as the fuel of incinerator and carries out burning disposal；The condensate liquid carries out
It is discharged after biochemical treatment；The incoagulable gas, which is imported into incinerator, makes the PCB give up film slag full combustion.
Preferably, in the step A, the useless film slag of PCB to moisture content greater than 65% is filtered, and reduces its moisture content extremely
40%~65%；The mode of the filtering is filters pressing or centrifugal filtration.
Preferably, in the step B, the mesh particle size range of the waste active carbon is 200 mesh~400 mesh.
Preferably, in the step B, the waste active carbon account for the PCB give up film slag weight proportional region be 5%~
10%.
Preferably, in the step B, the waste active carbon is the waste active carbon after adsorption treatment volatile organic matter.
Preferably, in the step C, the useless film slag of the PCB, which is placed in the vacuum desiccator with agitating function, to be stirred
Vacuum drying.
Preferably, in the step C, the PCB gives up the vacuum drying condition of film slag are as follows: vacuum degree >=0.06MPa, temperature
>=60 DEG C, drying time≤3h.
Preferably, it is characterised in that: in the step C, the steam generated in the process of vacuum drying is by heat exchange
The condensate liquid and the incoagulable gas are generated after device.
Preferably, in the step C, the drying standard of the useless film slag of the PCB is the moisture content of the useless film slag of PCB after drying
≤ 5% or Lower heat value >=2000kcal/kg.
Preferably, in the step D, the standard of the condensate liquid after biochemical treatment is COD≤30mg/
L, ammonia-nitrogen content≤1.5mg/L, total phosphorus content≤0.3mg/L.
Compared with prior art, incinerator can be used as using the useless film slag of the method for the invention PCB that treated dries
Fuel carries out burning disposal, and condensate liquid qualified discharge after biochemical treatment, incoagulable gas, which is importing directly into incinerator, to be made
Its full combustion, the equipment that incinerator can be used as heating or burning, energy be supplied to needs application or scene, such one
Come, not only can safe disposal PCB give up film slag, but also its recycling can be used.VOCs processing is also solved simultaneously with useless activity
Charcoal granularity is small, the bad charging of burning disposal, directly burns the problems such as being easy detonation.Production process of the present invention is simple, cost
It is low, do not generate secondary pollution.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiment.Obviously, described
Embodiment be only some embodiments of the invention, rather than whole embodiment.Based on the embodiment party in the present invention
Formula, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all belongs to
In the scope of protection of the invention.It should be noted that " biochemical treatment " is to be mixed waste water with microorganism, microorganism is utilized
Organic matter and certain inorganic toxic materials in intracorporal biological chemistry action Decomposition Wastewater, make unstable organic matter and inorganic toxic material
It is converted into a kind of sewage water treatment method of innocuous substance." COD COD " be chemically measure waste water in need by
The amount of the reducing substances of oxidation, it is the organic pollution parameter in an important waste water." ammonia nitrogen NH3- N " is in waste water
Ammonia-nitrogen content index, is a major criterion for measuring water quality, and ammonia-nitrogen content height will lead to water eutrophication." total phosphorus P " is
The total content of P elements in water body, is one of the index that water body is rich in organic matter, and phosphorus content can excessively cause wawter bloom or red tide, beat
The balance of random water body.Unless otherwise defined, all technical and scientific terms used herein and belong to technology of the invention
The normally understood meaning of the technical staff in field is identical.The title of used technological means is in the description of the invention
In order to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.
Specific embodiment includes the following steps:
A. processing is filtered to the PCB film slag that gives up, to reduce its moisture content；
B. the useless film slag of the filtered PCB is placed in blender, waste active carbon is added and is simultaneously stirred, made described
PCB is useless, and the waste active carbon is adhered on film slag surface；
C. by it is described attachment waste active carbon PCB give up film slag be dried in vacuo, and collect generated in drying process it is cold
Lime set and incoagulable gas；
D. the PCB after the drying is given up into film slag as the fuel of incinerator and carries out burning disposal；The condensate liquid carries out
Qualified discharge after biochemical treatment；The incoagulable gas, which is importing directly into incinerator, makes the PCB give up film slag full combustion.
The useless film slag of PCB in step A by moisture content greater than 65% is filtered, and reduces its moisture content to 40%~65%；
The filter type be filters pressing or centrifugal filtration, specifically, by using filter press carry out filters pressing or using centrifugal filter into
Row centrifugal filtration.
The useless film slag of PCB that the moisture content is 40%~65% is placed in blender in step B, waste active carbon is added simultaneously
It is stirred, the useless film slag surface the PCB is made to adhere to the waste active carbon.The mesh particle size range of the waste active carbon is 200 mesh
~400 mesh.Wherein measurement unit mesh refers to the empty eye number on sieve per square inch, for indicate can be by the grain of sieve
The partial size of son, mesh number is higher, and partial size is smaller.The waste active carbon of the addition account for the PCB give up film slag weight proportional region be
5%~10%.The waste active carbon is the waste active carbon of VOCs after adsorption treatment volatile organic matter.
The useless film slag of PCB of the attachment waste active carbon is dried in vacuo in step C, and collects in drying process and generates
Condensate liquid and incoagulable gas.Specifically, the useless film slag of the PCB is placed in the vacuum desiccator with agitating function and is stirred
Mix vacuum drying.The PCB gives up the vacuum drying condition of film slag are as follows: vacuum degree >=0.06MPa, temperature >=60 DEG C, drying time
≤3h.The PCB give up film slag drying standard be it is dry after the useless film slag of PCB moisture content≤5% or Lower heat value >=
2000kcal/kg.Vacuum drying technique is the vacuumizing in closed container, depressurize and a kind of method for being dried.Very
Empty drying can be divided into boiling point and be dried and frozen dry two ways.The present invention uses boiling point dry technology, that is, passes through the side of heating
Formula supplies the enough heats of moisture in the useless film slag of PCB, makes to evaporate and boils while carrying out, accelerates vaporization rate.Meanwhile passing through
The steam for vacuumizing quickly extraction vaporization is finally reached the purpose of the useless film slag of rapid draing PCB.It is produced in the process of vacuum drying
Raw steam generates condensate liquid and incoagulable gas after over-heat-exchanger, collects condensate liquid and incoagulable gas.The condensation
The main component of liquid can be water.The exhaust gas that the ingredient of the incoagulable gas can be desorbed out for air, in waste active carbon
Or other exhaust gas.
The PCB after the drying is given up into film slag as the fuel of incinerator in step D and carries out burning disposal；The condensate liquid
Qualified discharge after progress biochemical treatment；The incoagulable gas, which is importing directly into incinerator, fires the useless film slag of the PCB sufficiently
It burns.Specifically, the condensate liquid must reach rule in " water environment quality standard " (GB3838-2002) after carrying out biochemical treatment
It is discharged after IV fixed class standard.IV class standard of " water environment quality standard " (GB3838-2002) is suitable for general
The discharge of wastewater in industrial pool and the recreational water area of human body non-direct contact, standard regulation COD (COD)≤
30mg/L, ammonia nitrogen (NH3- N)≤1.5mg/L, total phosphorus (P)≤0.3mg/L.
The present invention discloses a kind of methods of PCB useless film slag and waste active carbon Combined Treatment.In the method, dry useless film
The fuel that slag can be used as incinerator carries out burning disposal, and condensate liquid carries out qualified discharge after Sewage advanced treatment, incoagulable gas
Being importing directly into incinerator makes its full combustion.To adsorb simultaneously the waste active carbon after VOCs be used as surfactant with
The PCB film slag that gives up carries out integrated treatment, and it is small also to solve VOCs processing waste active carbon granularity, the bad charging of burning disposal, directly
Burn the problems such as being easy detonation.And the process does not generate secondary pollution, and production process is simple, at low cost, safety
Environmental protection.
Embodiment one:
A collection of PCB is taken to give up film slag, measuring the give up moisture content of film slag of this crowd of PCB is about 81%, the prior art is such as used, in temperature
Degree needs time-consuming about 12h to dry the useless film slag of this crowd of PCB under conditions of 105 DEG C and normal pressure 100Kpa.
Firstly, centrifugal filtration is carried out to the useless film slag of this crowd of PCB using centrifugal filter, in the condition that revolving speed is 2000rpm
Under, centrifugal filtration 5min, the PCB after the part water that is removed give up film slag, and moisture content is about 55%.
Secondly, being placed in the useless film slag of PCB that the moisture content is about 55% in the blender with blender, addition accounts for about
The PCB gives up the waste active carbon adsorbed after VOCs of film slag amount 10%, and the mesh particle size range of the active carbon is 200~
300 mesh, turn on agitator stir at low speed 60min, are uniformly mixed the useless film slag of the PCB and the active carbon, it is therefore intended that right
It is modified that the useless film slag of the PCB carries out surface.
Then, the useless film slag of the modified PCB in the surface is placed in the vacuum desiccator with agitating function and is stirred
It is evaporated in vacuo drying, vacuum degree 0.08MPa, temperature is 60 DEG C, and after evaporating 3h, the moisture content of the useless film slag of the PCB is down to
5% hereinafter, compared to the prior art, drying time reduces 9h.
Reach 5000kcal/kg or more through above-mentioned steps treated PCB film slag Lower heat value of giving up after measured, and it is brown
The calorific value of coal is suitable, while its sulphur (S), chlorine (Cl) content are far below into kiln standard, and sulfur content and chlorinity enter kiln standard scores
It Wei not S%≤1% and Cl%≤0.1%.Be evaporated in vacuo the condensate liquid collected in drying process carry out the COD after biochemical treatment≤
30mg/L, NH3- N≤1.5mg/L, P≤0.3mg/L, discharged wastewater met the national standard.
Embodiment two:
A collection of PCB is taken to give up film slag, measuring the give up moisture content of film slag of this crowd of PCB is about 41%, the prior art is such as used, in temperature
Degree needs time-consuming about 8h to dry the useless film slag of this crowd of PCB under conditions of 105 DEG C and normal pressure 100Kpa.
Firstly, being placed in the useless film slag of PCB that the moisture content is about 41% in the blender with blender, addition accounts for about
The waste active carbon of the useless film slag amount 5% of the PCB adsorbed after VOCs, the mesh particle size range of the active carbon are 200~300
Mesh, turn on agitator stir at low speed 60min, are uniformly mixed the useless film slag of the PCB and the active carbon, it is therefore intended that institute
It is modified to state PCB useless film slag progress surface.
Then, the useless film slag of the modified PCB in the surface is placed in the vacuum desiccator with agitating function and is stirred
It is evaporated in vacuo drying, vacuum degree 0.08MPa, temperature is 95 DEG C, and after evaporating 2h, the moisture content of the useless film slag of the PCB is down to
5% hereinafter, compared to the prior art, drying time reduces 6h.
Reach 5000kcal/kg or more through above-mentioned steps treated PCB film slag Lower heat value of giving up after measured, and it is brown
The calorific value of coal is suitable, while its sulphur, chlorinity are far below into kiln standard, and the kiln standard that enters of sulfur content and chlorinity is respectively S%
≤ 1% and Cl%≤0.1%.It is evaporated in vacuo the condensate liquid collected in drying process and carries out COD≤30mg/L after biochemical treatment,
NH3- N≤1.5mg/L, P≤0.3mg/L, discharged wastewater met the national standard.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, embodiment of above are only for interpreting the claims.Right protection scope of the present invention is not limited to specification.Appoint
What those familiar with the art within the technical scope of the present disclosure, the variation or replacement that can be readily occurred in,
It is included within the scope of the present invention.
Claims (10)
- A kind of method of film slag and waste active carbon Combined Treatment 1. PCB gives up, includes the following steps:A. processing is filtered to the PCB film slag that gives up, to reduce its moisture content；B. the useless film slag of the filtered PCB is placed in blender, waste active carbon is added and is simultaneously stirred, keep the PCB useless The waste active carbon is adhered on film slag surface；C. the useless film slag of PCB of the attachment waste active carbon is dried in vacuo, and collects the condensate liquid generated in drying process And incoagulable gas；D. the PCB after the drying is given up into film slag as the fuel of incinerator and carries out burning disposal；The condensate liquid carries out biochemical It is discharged after processing；The incoagulable gas, which is imported into incinerator, makes the PCB give up film slag full combustion.
- The method of film slag and waste active carbon Combined Treatment 2. PCB according to claim 1 gives up, it is characterised in that: the step In rapid A, the useless film slag of PCB to moisture content greater than 65% is filtered, and reduces its moisture content to 40%~65%；The filtering Mode is filters pressing or centrifugal filtration.
- The method of film slag and waste active carbon Combined Treatment 3. PCB according to claim 1 gives up, it is characterised in that: the step In rapid B, the mesh particle size range of the waste active carbon is 200 mesh~400 mesh.
- The method of film slag and waste active carbon Combined Treatment 4. PCB according to claim 1 gives up, it is characterised in that: the step In rapid B, the proportional region that the waste active carbon accounts for the useless film slag weight of the PCB is 5%~10%.
- The method of film slag and waste active carbon Combined Treatment 5. PCB according to claim 1 gives up, it is characterised in that: the step In rapid B, the waste active carbon is the waste active carbon after adsorption treatment volatile organic matter.
- The method of film slag and waste active carbon Combined Treatment 6. PCB according to claim 1 gives up, it is characterised in that: the step In rapid C, the useless film slag of the PCB, which is placed in the vacuum desiccator with agitating function, is stirred vacuum drying.
- The method of film slag and waste active carbon Combined Treatment 7. PCB according to claim 1 gives up, it is characterised in that: the step In rapid C, the PCB gives up the vacuum drying condition of film slag are as follows: vacuum degree >=0.06MPa, temperature >=60 DEG C, drying time≤3h.
- The method of film slag and waste active carbon Combined Treatment 8. PCB according to claim 1 gives up, it is characterised in that: the step In rapid C, the steam generated in the process of vacuum drying generates the condensate liquid and the incoagulability gas after over-heat-exchanger Body.
- The method of film slag and waste active carbon Combined Treatment 9. PCB according to claim 1 gives up, it is characterised in that: the step In rapid C, the PCB give up film slag drying standard be it is dry after the useless film slag of PCB moisture content≤5% or Lower heat value >= 2000kcal/kg。
- The method of film slag and waste active carbon Combined Treatment 10. PCB according to claim 1 gives up, it is characterised in that: the step In rapid D, the standard of the condensate liquid after biochemical treatment is COD≤30mg/L, ammonia-nitrogen content≤1.5mg/L, always Phosphorus content≤0.3mg/L.
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| CN201710601151.6A CN107300184B (en) | 2017-07-21 | 2017-07-21 | The method of PCB useless film slag and waste active carbon Combined Treatment |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011150588A1 (en) * | 2010-06-02 | 2011-12-08 | 华南再生资源（中山）有限公司 | Production equipment for comprehensively utilizing renewable energy resources of waste plastics, tires and waste engine oil |
| CA2859599A1 (en) * | 2011-01-14 | 2012-07-19 | Dja Technologies Inc. | Production of biochar absorbent from anaerobic digestate |
| CN102899489A (en) * | 2012-11-05 | 2013-01-30 | 桂林电子科技大学 | Method for recovering gold from electronic wastes by using solidified persimmon tannin |
| CN105414151A (en) * | 2015-12-09 | 2016-03-23 | 安徽中泰创展环境科技有限公司 | Household garbage treatment process |
-
2017
- 2017-07-21 CN CN201710601151.6A patent/CN107300184B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011150588A1 (en) * | 2010-06-02 | 2011-12-08 | 华南再生资源（中山）有限公司 | Production equipment for comprehensively utilizing renewable energy resources of waste plastics, tires and waste engine oil |
| CA2859599A1 (en) * | 2011-01-14 | 2012-07-19 | Dja Technologies Inc. | Production of biochar absorbent from anaerobic digestate |
| CN102899489A (en) * | 2012-11-05 | 2013-01-30 | 桂林电子科技大学 | Method for recovering gold from electronic wastes by using solidified persimmon tannin |
| CN105414151A (en) * | 2015-12-09 | 2016-03-23 | 安徽中泰创展环境科技有限公司 | Household garbage treatment process |
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