Device of second birth of activated carbon desorption

One, definition of activated carbon reborn

Activated carbon second birth (namely activation) , it is to show with physics or chemistry the method is not destroying activated carbon below the premise of original structure, adsorption the adsorption on activated carbon gives character purify, rehabilitate its adsorption property, achieve thereby repeat use end.

1, the target that activated carbon second birth can reach and effect

Device of the heat inside heat of adoption circumgyrate of spontaneous combustion straight heat production activated carbon can use inferior specific power consumption second birth of saturant activated carbon, this device can achieve 81%-92% to the second birth utilization rate of activated carbon, the manage of the activated carbon after second birth changes index to achieve or approach new charcoal level, in home this domain is in banner level.

2, advanced to technology of reborn of saturated activated carbon sex

(1) serial production, quality is stable, good control, plant construction is novel, the operation is handy, infrastructure investment is little, equipment volume is minor, the design is reasonable;

(2) 3 phase finish dry, roast, activation;

(3) the second birth range that can receive activated carbon is wider, the grain of saturated activated carbon should be in only be less than 50 eye the following, OK second birth, what be hard to use the second birth method that discharge heats to a few not quite electric saturated activated carbon is OK activation second birth undertakes in this device;

(4) after activation temperature is more than 800 ℃ equipment to move normally, do not need exterior and compensatory quantity of heat;

(5) connect activation gas to be able to undertake activation to char makings, make a new activated carbon, the air of compensatory and certain amount, will get production the temperature of need of activated carbon place;

(6) whole make unit process of cargo bandling of activated carbon of new charcoal, second birth can implement automation;

3, use second birth means

According to the experience that accumulates for years, first selection high temperature heats second birth law, high temperature heats the advantage of second birth law depends on his can resolving a variety of matter in renewal process, second birth environment is favorable, become means of main second birth thereby. Commonly used high temperature heats second birth method has: Multilayer furnace of activation furnace, activation of layer of going from place to place and furnace of circumgyrate type activation, those who use is the circumgyrate oven that owns own intellectual property, its characteristic is can saturant activated carbon rolls inside furnace hall even, activation is lucid, compare with other furnace photograph especially, have more stability and reliable second birth quality.

3, meaning of activated carbon reborn

The country was released early or late ” economy of loop of People’s Republic of China promotes a doctrine ” , ” ” 925 ” circular economy develops a program ” wait for a file, encourage the recycle that waste material produces in each industry takes seriously and enhancing production, life. Activated carbon serves as use a kind of extensive sorbent, of all kinds industry year use amount is quite considerable, recycle of activated carbon of second birth saturation has beneficial result of very strong economy, environment, be mixed by national policy support encourage.

1, be helpful for circular economy

The applied range of activated carbon is wide with each passing day, but because activated carbon is easy in use process saturated and lose adsorptive ability, must achieve use result thereby through often changing. And activated carbon price is high, change every time new charcoal, meet those who promote a business run cost, must want to consider to undertake to saturated activated carbon second birth is used so, in order to achieve the goal of circular economy.

2, be helpful for energy-saving decrease a platoon

If 1 ton of saturated activated carbon are burned as litter, be equivalent to releasing 0.128 tons of carbon dioxide to atmosphere. Make 1 ton of high grade activated carbon, need uses up 8 tons of lumber or 8 tons of raw coal, the second birth of activated carbon can reduce pair of coal natural resources in great quantities use up, reduce air pollution, reduce the sources of energy to waste.

4, means of reborn of saturated activated carbon

The second birth method of activated carbon has a lot of kinds, for example: Heat law of second birth law, biology second birth, wet law of law of oxidation law, solvent second birth, electrochemistry second birth, catalysis is wet oxidation law.

(1) heat second birth law

Heat second birth law is application most, the method of the most mature activated carbon second birth on industry. The activated carbon after handling organic liquid waste is in renewal process, differ according to heating the change of organic matter when temperature, general component reachs activation for char of dry, high temperature 3 phase. In dry phase, can volatilize on main purify activated carbon composition. Phase of high temperature char is to make the adsorptive one part on activated carbon desorption of organic matter boiling, vaporization, organic matter produces one part decompose reaction, generate desorption of young member hydrocarbon to come out, leftover composition stays inside activated carbon hole to become ” fixed charcoal ” . In this one phase, temperature will be achieved 800 — 900 ° C, to prevent the combustion of activated carbon, undertake below vacuumize or inert atmosphere commonly. Next in activation phase, the gas such as CO2, CO, H2 or vapor is connected inside past reaction boiler, in order to clear activated carbon small hole, make its rehabilitate adsorptive property, activation phase is the key of whole reclaim technology. Although law of hot second birth has second birth effect to lead the characteristic with wide range of tall, application, but in renewal process, need adscititious the sources of energy to heat, investment and moving cost is higher.

(2) law of biology second birth

Law of biology second birth is the bacterium that uses classics domestication to pass, the adsorptive organic matter on analytic activated carbon, digest the process that decomposes H2O and CO2 further. The biology law photograph in law of biology second birth and sewage disposal is similar, also have the branch of good oxygen law and law of oxygen of be disgusted with. Because the aperture of activated carbon itself is very small, some has rice of a few accept only, microbial cannot enter such hole, think to be able to produce a cell in renewal process normally from dissolve phenomenon, namely the cell is enzymatic outside flowing to afterbirth, and activated carbon is right enzymatic have sorption, because this forms enzymatic hurried center in charcoal surface, promote contaminant to decompose thereby, achieve reborn goal. Biology law goes easily simply, investment and moving charge is inferior, but what need time longer, the effect that suffers water quality and temperature is very big.

(3) wet law of oxidation second birth

Below the condition of high temperature high pressure, serve as oxidizer with oxygen or air, the organic matter that is in the adsorption on the activated carbon below fluid photograph condition oxidation resolves a kind of processing technique of young member, call wet law of oxidation second birth. Condition of optimal second birth is the activated carbon that the experiment obtains: Second birth temperature 230 ℃ , 1h of second birth time, fill oxygen PO20.6MPa, add charcoal to measure 15g, add water to measure 300mL. Second birth efficiency is achieved (45 ± 5)% , via 5 loops second birth, efficiency of its second birth drops only 3% . The partial oxidation of small hole of activated carbon surface is the main reason that second birth efficiency drops.

(4) law of solvent second birth

Law of solvent second birth is to use activated carbon, dissolvent and be pledged by adsorption 3 person the photograph between concerns evenly, wait for a condition through changing the PH of temperature, dissolvent to be worth, break adsorptive balance, come down adsorption from the desorption on activated carbon character. Law of solvent second birth applies to those reversible adsorption quite, be like the adsorption of organic to high concentration, low boiling point liquid waste. Its specific aim is stronger, often a kind of dissolvent can desorption is certain contaminant, and the contaminant sort in water treatment process is various, metabolic adventitious, the applied range of a kind of specific dissolvent is accordingly narrower.

(5) law of electrochemistry second birth

Law of electrochemistry second birth is technology of a kind of second birth of new-style activated carbon that researching. This method is activated carbon fill between two main electrode, in electrolyte, try dc field, activated carbon issues polarization in electric field action, one aspect of the matter becomes positive pole, another end shows cathode, form small electrobath, the cathode place in activated carbon and zincous place can produce reductive reaction and oxidation reaction respectively, adsorptive the contaminant on activated carbon is major decompose because of this, fraction produces desorption because of electrophoresis strength effect. This method operation is convenient and efficiency tall, specific power consumption is low, its handle object place to suffer limitation lesser, if handle craft to perfect, can avoid 2 times to pollute.

(6) catalysis is wet oxidation law

Traditional and wet efficiency of oxidation law second birth is not tall, specific power consumption is bigger. Second birth temperature is the main reason that affects second birth efficiency, but the appearance that improves second birth temperature to be able to increase activated carbon oxidizes, reduce second birth efficiency thereby. Accordingly, people consideration have the aid of is efficient activator, use catalysis wet activated carbon of oxidation law second birth. The researcher that changes research state key laboratory with control of environment of aid university water and resource is beginning the research of this respect. As the thorough popular feeling that can develop an idea continuously, activated carbon reclaim technology and technology get the attention of people increasingly.