CN103551137A - Preparation method and application of solid catalyst using sludge-based activated carbon as matrix material - Google Patents
Preparation method and application of solid catalyst using sludge-based activated carbon as matrix material Download PDFInfo
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- CN103551137A CN103551137A CN201310520488.6A CN201310520488A CN103551137A CN 103551137 A CN103551137 A CN 103551137A CN 201310520488 A CN201310520488 A CN 201310520488A CN 103551137 A CN103551137 A CN 103551137A
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Abstract
The invention discloses a preparation method of a solid catalyst using sludge-based activated carbon as the matrix material. The preparation method comprises the following steps: 1) dehydration: centrifugally dehydrating excess sludge after biochemical treatment in a sewage treatment plant or station till the water content is 40-50%; 2) activation: mixing the sludge with crushed corncobs and then adding the mixture together with an activator into an activation reactor, and stirring for 6-8 hours; 3) drying: dehydrating the activated sludge via a centrifuge till the water content is 10%, grinding and screening after the sludge is vacuum dried, and selecting dry sludge granules with grain size of 1-2 millimeters for later use; 4) carbonization: pyrolyzing and carbonizing the sludge in a tube type resistance furnace for 3-4 hours under the protection of nitrogen at a temperature of 590-610 DEG C on the conditions that the flow rate is 10L/h, the temperature is raised with speed of 20 DEG C/min via procedures; and cooling to room temperature after the carbonization, grinding, screening, and selecting sludge granules with grain size of 1-2 millimeters; and 5) cleaning and drying to finish the preparation. According to the invention, the excess sludge after the biochemical treatment of sludge is used as resources, and the acquired solid catalyst is used for imbibing, adsorbing and biologically catalyzing and oxidizing organic waste gases.
Description
Technical field
The invention belongs to exhaust gas treatment technology and the new function material technical field of gaseous contaminant.Relate to and utilize the residual active sludge producing in cities and towns and During Industrial Wastewater Treatment Process, after screening and cultivate as dominant bacteria for the preparation of the method that improves oxidability activated charcoal solid biological adsorption agent.
Background technology
Waste water disposal facility in steel plant, paper mill, chemical plant, food factory, hospital, hotel etc. is produced or running, conventionally can produce the pollutants such as some stenches, poisonous and harmful, corrosivity.These materials are diffused in air, though cause corrosion problems and the peculiar smell that affects comfortableness, unlike strong corrosive gas, production equipment is caused to obvious injury, but chronic corrosion meeting progressive failure control system also causes very major injury to human body, and administrative staff often need a period of time to find.Increase thus a large amount of enterprise's production and maintenance cost expenditure, related personnel's medical treatment & health expense expenditure, both affected environment and also caused a lot of unnecessary losses.
The gaseous contaminant producing in said process.Gaseous contaminant is of a great variety, and characteristic is different, the improvement method of employing also each not just as, conventional method has: absorption process, absorption method, catalysis method, combustion method, condensation method and emerging biological extraction liquid catalytic oxidation etc.
At present, the waste gas that manufacturing enterprise and sewage treatment facility thereof produce the at present modes of absorption process and absorption method combination that adopt is processed more, wherein absorption process principle is: when adopting certain liquid handling admixture of gas, in the contact process of liquid phase, the different solubility of different component in admixture of gas in same liquid, the large component of one or several solubility in gas will enter into liquid phase, thereby make each component relative concentration in gas phase that change occur, mist has obtained isolation of purified.According to absorbent and absorbent, whether there is chemical reaction, and be divided into Physical Absorption and chemical absorbing.Absorption ratio juris is: owing to existing lack of equilibrium and unsaturated molecular attraction and chemical bonding force on the surface of solids, therefore when this surface of solids contacts with gas, just can attract gas molecule, it is concentrated and remain on the surface of solids, with this, realize the purification to mist.In conjunction with administering, gaseous contaminant has technical maturity, equipment is simple, one-time investment is low has very high arresting efficiency to required decontaminant components to above-mentioned two kinds of technology, for dust-laden, containing wet, also can process containing the waste gas of sticky pollutant, because have wide range of applications simultaneously.But simultaneously above-mentioned two kinds of methods are in conjunction with also there being some problems, because absorption is that the harmful substance in gas has been transferred in liquid, in these materials, some also has recovery value, therefore to hand cleanser, must process, otherwise will cause the waste of resource or cause secondary pollution, in use for some time, adsorption capacity can obviously decline and even lose the adsorbent of absorption method, therefore will constantly to inefficacy adsorbent, regenerate.By regeneration, can be that adsorbent is reused, reduce absorption expense, because changing too frequently, for high-concentration waste gas, purify and adopt absorption method effect unsatisfactory.
Biochemical treatment is a kind of sewage treatmentmethod that operation is at present the most stable, operating cost is very low through facts have proved for many years.Activated sludge in treatment facility and dominant bacteria have good removal effect through mud admonitory talk to subordinates process for the various pollution factors in sewage.The day-to-day operation of some sewage treatment facilities can not stopping pregnancy residual active sludge, as discharged not in time treatment facility, can have a negative impact to whole treatment system, therefore need carry out sludge dewatering work, and dehydrated sludge is delivered to and had the unit that processes qualification and process (most of for burning at present), need a large amount of financial supports, and excess sludge can not get good utilization.
Summary of the invention
For above-mentioned prior art, the excess sludge recycling that the present invention produces sewage biochemical treatment, it is the preparation method of the solid catalyst of sludge-based activated carbon that a kind of skeleton is provided, and the solid catalyst preparing is for absorbing, and absorption and bio-catalytical oxidation are processed organic exhaust gas.
In order to solve the problems of the technologies described above, the present invention is for the treatment of the solid catalyst of organic industry waste gas, and its skeleton is sludge-based activated carbon.
Skeleton of the present invention is the preparation method of the solid catalyst of sludge-based activated carbon, by following step, is undertaken:
Step 1, dehydration: Sewage Plant or enterprise's Sewage Disposal biochemical treatment excess sludge be through centrifuge dewatering, obtain moisture content at 40～50% biochemical sludge;
Step 2, activation: the biochemical sludge that above-mentioned steps one is obtained and the corncob of pulverizing are that 20:3～4 are mixed into mixture according to weight ratio; Said mixture and activator are joined in the activation kettle with mixing plant successively to stir-activating 6～8h; Wherein, activator is 2moL/L KOH solution or 1.5mol/L ZnCl
2solution; The weight ratio of biochemical sludge and KOH amount of solid is 20:2～3, biochemical sludge and ZnCl
2the weight ratio of amount of solid is 20:1～2;
Step 3, dry: the mud after above-mentioned steps two is activated is again through centrifuge dewatering, make moisture percentage in sewage sludge 10%, then 105～110 ℃ of dry 3h in vacuum drier, obtain sludge-drying body, after sludge-drying body is sieved successively in grinding in ball grinder, sifter, the sludge-drying body particle of choosing particle diameter and be 1-2mm is standby;
Step 4, charing: the sludge-drying body particle that step 3 is obtained carries out carbonization, the process conditions of carbonization are: nitrogen is protection gas, and flow is 10L/h, in tube type resistance furnace, the speed temperature programming of 20 ℃/min, pyrolysis charring 3～4h at 590～610 ℃ of temperature; The waste gas producing in carbonization process is passed into the exhaust gas absorption cell that alkali lye is housed; Solid cooled after carbonization, to room temperature, is sieved successively in grinding in ball grinder, sifter, choose particle diameter at the particle of 1～2mm;
Step 5, washing: the particle that above-mentioned steps four is obtained clear water washing in washing kettle for several times, is the solid catalyst that skeleton is sludge-based activated carbon after drying.
Further, this preparation method also comprises:
Step 6, catalyst regeneration: inactivation rear catalyst is added in washing kettle, the NaOH solution washing that is first 5% with percentage by weight, more extremely neutral with clear water washing, after drying, repeat step 3, step 4 and step 5, solid catalyst after must regenerating.
The solid catalyst that the present invention is a kind of is sludge-based activated carbon by skeleton is for absorbing, absorption and bio-catalytical oxidation are processed the application of organic exhaust gas, wherein, adopt high-efficient solid sieve-plate tower, and solid catalyst is packed in this high-efficient solid sieve-plate tower, with this, improve gas between organic exhaust gas and catalyst, solid two-phase contact gear ratio surface area, improve treatment effeciency.
The present invention organically combines the preparation process of the disposal of mud and catalyst, both processed remaining mud, can prepare absorption and sorption and bio-catalytical oxidation inorganic agent with lower cost again, exhaust-gas treatment facilities efficiency improved greatly, effectively removed conventional method the difficult organic gas pollutant of removing.The sludge-based activated carbon absorption and sorption that the present invention makes, catalytic oxidant are in the processing procedure of organic gas pollutant, all kinds of noxious pollutants in waste gas are had to good removal effect, with low cost, operating equipment and method are simple, and convenient recovery with regeneration used.Excess sludge and dominant bacteria recycling are prepared based on high-efficient solid sieve-plate tower fiberglass bed course sludge-based activated carbon, for the treatment of organic gas pollutant, had good environmental benefit and economic benefit.
Compared with prior art, the invention has the beneficial effects as follows:
(1) unnecessary mud is carried out to recycling, the corncob adding and KOH nonhazardous effect, newly do not introduce metal ion, can environment do not produced and be polluted, low cost of manufacture;
(2) process range is wide, is easy to realize and apply, and can realize coupling with traditional absorption and sorption method easily, improves the economic benefit of whole industrial waste gas processing procedure;
(3) compare the methods such as traditional single absorption and sorption, reaction, the method is in conjunction with absorption and sorption and carry out a biological disposal upon several functions, and binding matrix active carbon has been given full play to absorption and sorption and biological treatment three's advantage;
(4) compare with traditional integral filling packing type solid catalyst, this solidified biological inorganic agent is combined more firm with activated carbon surface, making full use of high-efficient solid sieve-plate tower is supporting layer, there is gas and liquid mass-transfer efficiency is high, be difficult for stopping up, and can not produce because the obstruction of integral body filling filler causes enterprise's contact inhomogeneous the problems such as absorption, the short stream of liquid, catalyst performance stabilised, catalyst is longer service life.
(5) solid catalyst is convenient reclaims and regeneration.
The specific embodiment
The more detailed description of the present invention thes contents are as follows:
Inventive principle: the multi-source recycling sludges such as the excess sludge that the present invention produces city and the biochemical treatment of trade effluent plant stand utilize, is used for preparation and has absorption and sorption, biological treatment agent.The present invention will prepare sludge-based activated carbon technique and utilize the waste gas treatment process of absorption and sorption, biological treatment agent to be integrated, and sets up a set of method of utilizing the preparation of multi-source mud to have catalysis active carbon.Dehydrated sludge is through steps such as overactivation, dry, grinding, screening, mixing, roastings, and preparing skeleton is the solid catalyst for the treatment of organic industry waste gas of sludge-based activated carbon.
Method step:
For realizing the object of foregoing invention, the preparation method of the solid catalyst that a kind of skeleton of the present invention is sludge-based activated carbon, is undertaken by following step:
Step 1, dehydration: Sewage Plant or enterprise's Sewage Disposal, if Resin Industry Sewage Disposal biochemical treatment excess sludge is through centrifuge dewatering, obtain moisture content at 40～50% biochemical sludge;
Step 2, activation: the biochemical sludge that above-mentioned steps one is obtained and the corncob of pulverizing are that 20:3～4 are mixed into mixture according to weight ratio; Said mixture and activator are joined in the activation kettle with mixing plant successively to stir-activating 6～8h; Wherein, activator is 2moL/L KOH solution or 1.5mol/L ZnCl
2solution; The weight ratio of biochemical sludge and KOH amount of solid is 20:2～3, biochemical sludge and ZnCl
2the weight ratio of amount of solid is 20:1～2;
Step 3, dry: the mud after above-mentioned steps two is activated is again through centrifuge dewatering, make moisture percentage in sewage sludge 10%, then 105～110 ℃ of dry 3h in vacuum drier, obtain sludge-drying body, after sludge-drying body is sieved successively in grinding in ball grinder, sifter, the sludge-drying body particle of choosing particle diameter and be 1-2mm is standby;
Step 4, charing: the sludge-drying body particle that step 3 is obtained carries out carbonization, the process conditions of carbonization are: nitrogen is protection gas, and flow is 10L/h, in tube type resistance furnace, the speed temperature programming of 20 ℃/min, pyrolysis charring 3～4h at 590～610 ℃ of temperature; The waste gas producing in carbonization process is passed into the exhaust gas absorption cell that alkali lye is housed; Solid cooled after carbonization, to room temperature, is sieved successively in grinding in ball grinder, sifter, choose particle diameter at the particle of 1～2mm;
Step 5, washing: the particle that above-mentioned steps four is obtained clear water washing in washing kettle for several times, is the solid catalyst that skeleton is sludge-based activated carbon after drying.
Step 6, catalyst regeneration: inactivation rear catalyst is added in washing kettle, the NaOH solution washing that is first 5% with percentage by weight, more extremely neutral with clear water washing, after drying, repeat step 3, step 4 and step 5, solid catalyst after must regenerating.
The skeleton that the present invention is prepared is that the solid catalyst of sludge-based activated carbon is for absorbing, absorption and bio-catalytical oxidation are processed the application of organic exhaust gas, wherein, adopt high-efficient solid sieve-plate tower, and solid catalyst is packed in this high-efficient solid sieve-plate tower, with this, improve gas between organic exhaust gas and catalyst, solid two-phase contact gear ratio surface area, improve treatment effeciency.The present invention is applicable to absorption and sorption, biological treatment organic industry waste gas, for example: typical cities and towns and trade effluent are processed plant stand generation waste gas, chemical industry and manufactured processing industry and produce waste gas etc., and can combine use with other processing methods.
Although invention has been described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; in the situation that not departing from aim of the present invention, can also make a lot of distortion, within these all belong to protection of the present invention.
Claims (4)
1. for the treatment of a solid catalyst for organic industry waste gas, it is characterized in that, its skeleton is sludge-based activated carbon.
2. a preparation method for the solid catalyst that skeleton is sludge-based activated carbon, is characterized in that, by following step, is undertaken:
Step 1, dehydration: Sewage Plant or enterprise's Sewage Disposal biochemical treatment excess sludge be through centrifuge dewatering, obtain moisture content at 40～50% biochemical sludge;
Step 2, activation: the biochemical sludge that above-mentioned steps one is obtained and the corncob of pulverizing are that 20:3～4 are mixed into mixture according to weight ratio; Said mixture and activator are joined in the activation kettle with mixing plant successively to stir-activating 6～8h; Wherein, activator is 2moL/L KOH solution or 1.5mol/L ZnCl
2solution; The weight ratio of biochemical sludge and KOH amount of solid is 20:2～3, biochemical sludge and ZnCl
2the weight ratio of amount of solid is 20:1～2;
Step 3, dry: the mud after above-mentioned steps two is activated is again through centrifuge dewatering, make moisture percentage in sewage sludge 10%, then 105～110 ℃ of dry 3h in vacuum drier, obtain sludge-drying body, after sludge-drying body is sieved successively in grinding in ball grinder, sifter, the sludge-drying body particle of choosing particle diameter and be 1-2mm is standby;
Step 4, charing: the sludge-drying body particle that step 3 is obtained carries out carbonization, the process conditions of carbonization are: nitrogen is protection gas, and flow is 10L/h, in tube type resistance furnace, the speed temperature programming of 20 ℃/min, pyrolysis charring 3～4h at 590～610 ℃ of temperature; The waste gas producing in carbonization process is passed into the exhaust gas absorption cell that alkali lye is housed; Solid cooled after carbonization, to room temperature, is sieved successively in grinding in ball grinder, sifter, choose particle diameter at the particle of 1～2mm;
Step 5, washing: the particle that above-mentioned steps four is obtained clear water washing in washing kettle for several times, is the solid catalyst that skeleton is sludge-based activated carbon after drying.
3. the preparation method of the solid catalyst that skeleton is sludge-based activated carbon according to claim 2, is characterized in that, this preparation method also comprises:
Step 6, catalyst regeneration: inactivation rear catalyst is added in washing kettle, the NaOH solution washing that is first 5% with percentage by weight, more extremely neutral with clear water washing, after drying, repeat step 3, step 4 and step 5, solid catalyst after must regenerating.
4. the solid catalyst that is sludge-based activated carbon by skeleton is for absorbing, absorption and bio-catalytical oxidation are processed the application of organic exhaust gas, wherein, adopt high-efficient solid sieve-plate tower, and solid catalyst is packed in this high-efficient solid sieve-plate tower, for improving gas between organic exhaust gas and catalyst, solid two-phase contact gear ratio surface area.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107720748A (en) * | 2017-11-07 | 2018-02-23 | 于伟军 | A kind of sludge prepares active carbon method |
| CN110713182A (en) * | 2019-11-06 | 2020-01-21 | 中冶南方都市环保工程技术股份有限公司 | Method and system for co-processing coking wastewater sludge and tar residue |
| CN112427025A (en) * | 2020-10-19 | 2021-03-02 | 苏州华裕佳和新材料科技有限公司 | Preparation method and application of waste gas and waste water treating agent |
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| CN101024162A (en) * | 2007-01-09 | 2007-08-29 | 国家环境保护总局华南环境科学研究所 | Organic waste-gas adsorbant and preparing method and use |
| CN101767785A (en) * | 2010-01-07 | 2010-07-07 | 北京林业大学 | Method for preparing active carbon with high acid group content by mixing excess sludge and corn cobs |
| CN103007937A (en) * | 2012-12-14 | 2013-04-03 | 天津市联合环保工程设计有限公司 | Catalytical ozonization catalyst utilizing multi-source sludge to prepare and application thereof |
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2013
- 2013-10-29 CN CN201310520488.6A patent/CN103551137A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024162A (en) * | 2007-01-09 | 2007-08-29 | 国家环境保护总局华南环境科学研究所 | Organic waste-gas adsorbant and preparing method and use |
| CN101767785A (en) * | 2010-01-07 | 2010-07-07 | 北京林业大学 | Method for preparing active carbon with high acid group content by mixing excess sludge and corn cobs |
| CN103007937A (en) * | 2012-12-14 | 2013-04-03 | 天津市联合环保工程设计有限公司 | Catalytical ozonization catalyst utilizing multi-source sludge to prepare and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107720748A (en) * | 2017-11-07 | 2018-02-23 | 于伟军 | A kind of sludge prepares active carbon method |
| CN110713182A (en) * | 2019-11-06 | 2020-01-21 | 中冶南方都市环保工程技术股份有限公司 | Method and system for co-processing coking wastewater sludge and tar residue |
| CN112427025A (en) * | 2020-10-19 | 2021-03-02 | 苏州华裕佳和新材料科技有限公司 | Preparation method and application of waste gas and waste water treating agent |
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Application publication date: 20140205 |