CN101543721A - Method for purifying tail gas by using individual materials and raw material wooden meals for producing active carbon by chemical method - Google Patents
Method for purifying tail gas by using individual materials and raw material wooden meals for producing active carbon by chemical method Download PDFInfo
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- CN101543721A CN101543721A CN200810060522A CN200810060522A CN101543721A CN 101543721 A CN101543721 A CN 101543721A CN 200810060522 A CN200810060522 A CN 200810060522A CN 200810060522 A CN200810060522 A CN 200810060522A CN 101543721 A CN101543721 A CN 101543721A
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Abstract
The invention relates to a method for purifying carbon activated tail gas by using individual materials and raw material wooden meals for producing active carbon by chemical method. The method uses zinc hydroxide, zinc oxide and zinc carbonate as a neutralizing agent, uses wooden meal materials and raw material wooden meals permeated with an activating agent and mixed with the neutralizing agent as absorbing materials for absorbing tail gas pollutants, and uses the carbon activated tail gas as a fluidizing agent to fluidize the absorbing materials; during fluidizing, the neutralizing agent neutralizes chlorine hydride in the tail gas to form zinc chloride, and the absorbing materials absorb the pollutants such as activating agent volatile, wood tar, organic acid, creosote and the like in the tail gas; the purification operation comprises two steps: a first step, using the wooden meal materials permeated with the activating agent and mixed with the neutralizing agent to purify the tail gas so that the tail gas is basically purified and the activating agent is basically reclaimed; and a second step, using the raw material wooden meals to absorb the residual pollutants in the tail gas so that the tail gas is thoroughly purified and the activating agent is fully reclaimed, wherein the reclaimed activating agent is returned to the production process on site for activating. The method is economical, practical, simple and convenient.
Description
One, affiliated technology neck city
The present invention relates to the producing activated carbon by chemical method technical field, particularly relate to active carbon by chemical method production with self material, raw material wood chip method for cleaning off-gas
Two, background technology
Existing wood raw material all is with the moving bed activation method of rotary furnace and the fixed bed activation method of flattening oven with phosphoric acid, zinc chloride activation agent activation preparing active carbon technology.The critical defect of these 2 kinds of method equipment is the purification that lacks pollutant in the self tail gas, the recycling function that activator reclaims function and heat energy.So activator consumes high, phosphoric acid activation method is produced the 1t active carbon will consume 300～350kg phosphoric acid, zinc chloride activation method is produced the 1t active carbon will consume 200～300kg zinc chloride, therefore cause serious environmental to pollute. these 2 kinds of square law devices do not reclaim the function of heat energy in the self tail gas, so energy consumption is also than higher.At present, their tail gas pollution all is row improvement again after excreting.External tail gas pollution improvement technical difficulty is very big, use condensation method, the Venturi tube absorption process, the rotating stream tray scrubber absorption process, the spray absorption process, the moisture film absorption process, turbulent flow tower absorption process, the regulation effect of electricity demist method etc. is not good, the activator solution of Hui Shouing particularly, contained composition is very complicated, except that activator, also contain wood tar, organic acid, impurity such as creosote, be difficult to isolate pure activator, and concentration is not high, so can not directly do the activator reuse, the practical valency that reclaims activator is not high. and the corrosivity of charcoal activation tail gas is very strong, and treating tail gas equipment is very complicated, and cost is very high.
Three, summary of the invention
Goal of the invention
The purpose of this invention is to provide a kind of active carbon by chemical method production, with self raw material wood chip and material purification charcoal activation tail gas, reclaim activator, control is polluted, and the activator rate of recovery almost reaches 100% method.
Technical scheme
Active carbon by chemical method is produced, use self material, raw material wood chip method for cleaning off-gas, with zinc chloride, or zinc oxide, or zinc carbonate is a nertralizer, with wood raw material, infiltration has activator and is mixed with the absorbing material of the wood chip material of nertralizer as pollutant, activate tail gas as fluidizing agent with charcoal, with the raw material wood chip, the absorbing material fluidization, in fluidization, in the nertralizer and tail gas in hydrogen chloride and generate zinc chloride, absorbing material absorbs the activator volatile matter in the tail gas, the activator analyte, wood chip pyrogen wood tar, polluter such as organic acid and creosote, reclaim activator, fluidization purifies running and divides a Unit 2 to carry out, at the 1st unit, with infiltration activator and the wood chip material that is mixed with nertralizer being arranged is absorbing material, in and tail gas in acidic materials, absorb the polluter in the tail gas, tail gas is purified substantially, activator in the tail gas is reclaimed substantially, at the 2nd clean unit, again with the amounts of residual contamination do in the moist raw material wood chip absorption tail gas, thoroughly cleaning of off-gas reclaims the activator in the tail gas fully.
In above-mentioned side's purification case, the zinc hydroxide, zinc oxide, the zinc carbonate nertralizer that use are dry powder, fineness is greater than 100 orders, when the preparation liquor zinci chloridi, zinc chloride with nertralizer replacement 10～35%, be mixed with slurries, zinc content in the slurries still keeps the standard of conventional zinc chloride activation method. and the nertralizer powder also can not be formulated in the liquor zinci chloridi, and simultaneously powder is directly sprayed among the tail gas with absorbing material, in air-flow, form zinc chloride, be absorbed material again and absorb with the hydrogen chloride neutralization reaction.
In above-mentioned purification scheme, use phosphoric acid activation agent activation, then without nertralizer, when the preparation phosphoric acid solution, the acid concentration of the conventional phosphoric acid activation method of the concentration ratio of phosphoric acid solution reduces by 15～35%, because behind the phosphoric acid volatile matter and analyte in the absorbing material absorption cleaning tail gas, phosphoric acid still can reach the concentration of conventional method.
In above-mentioned side's purification case, as fluidizing agent tail gas, in the temperature that enters the purifier porch, should remain on and not make that material plastifies, is clamminess, the degree of blackening. temperature surpasses this degree, because of the material bonding, hinder fluidization operation, tail gas is in the temperature in purifier exit, should remain within the dew-point temperature-5 ℃ of tail gas～+ 2 ℃ scope.
To the inventive method, illustrate again below.
Embodiment 1
With zinc chloride activation agent activation preparing active carbon, use earlier zinc hydroxide, zinc oxide, the dry powder of zinc carbonate, fineness is greater than wantonly a kind in 100 orders, the zinc chloride that replaces zinc content 25%, be mixed with slurries with zinc chloride, use the spice method again, with the wood chip uniform mixing. so be mixed with material as absorbing material, the temperature of fluidizing agent tail gas is controlled at below 150 ℃, in the 1st clean unit, basically absorption cleaning the pollutant in the tail gas, use moist wood chip as absorbing material in the 2nd clean unit again, absorb pollutant remaining in the tail gas, control is discharged the temperature of tail gas about 65 ℃, zinc in the discharging tail gas, hydrogen chloride, pollutant loads such as wood tar all reach standard.
Embodiment 2
With zinc chloride activation agent activation preparing active carbon, liquor zinci chloridi with concentration ratio conventional method reduction by 25%, make material as the 1st clean unit absorbing material with wood chip, in tail gas, spray simultaneously zinc hydroxide, zinc oxide, the dry powder of zinc carbonate, fineness is greater than wantonly a kind in 200 orders, supply 25% zinc oxide concentration, at the 1st clean unit, pollutant in the tail gas has obtained basic purification, use moist wood chip as absorbing material in the 2nd clean unit again, absorb pollutant remaining in the tail gas, control is discharged the temperature of tail gas about 60 ℃, zinc in the discharging tail gas, hydrogen chloride, pollutant loads such as wood tar all reach standard.
Embodiment 3
With phosphoric acid activation agent activation preparing active carbon, the phosphoric acid concentration of the concentration ratio conventional method of phosphoric acid solution reduces by 25%, be mixed with material with these bits, absorbing material as the 1st clean unit, the inlet temperature of tail gas is controlled at below 160 ℃, the temperature of outlet is controlled at below 80 ℃, in the 1st clean unit, basically absorption cleaning the pollutant in the tail gas, in the 2nd clean unit, use moist wood chip as absorbing material again, absorb amounts of residual contamination do in the tail gas, control is discharged the temperature of tail gas about 60 ℃, phosphoric acid in the discharging tail gas, wood tar, pollutant loads such as organic acid all reach standard.
Advantage of the present invention is to gather materials on the spot, and uses the production material of oneself, raw material wood chip to pollute as administering, and reclaims the activator absorption material, and the activator of recovery need not anyly be processed, turn back on the spot among the production process, be used for activation, easy and simple to handle, equipment is simple, and effect is remarkable, and is economical and practical.
Claims (4)
1, self material of active carbon by chemical method production, raw material wood chip method for cleaning off-gas, with zinc chloride, zinc oxide, zinc carbonate is a nertralizer, activator is arranged and be mixed with the absorbing material of the wood chip material of nertralizer with infiltration as pollutant in the tail gas, activate tail gas as fluidizing agent with charcoal, with the raw material wood chip, the absorbing material fluidization, in fluidization, in the nertralizer and tail gas in acidic materials such as hydrogen chloride, absorbing material absorbs the activator volatile matter in the tail gas, wood tar, polluter such as organic acid and creosote, reclaim activator, fluidization purifies running and divides 2 unit to carry out, the 1st unit, with infiltration activator and the wood chip material that is mixed with nertralizer being arranged is absorbing material, in and the acidic materials in the tail gas, absorb the polluter in the tail gas, tail gas is purified substantially, activator in the tail gas is reclaimed substantially, at the 2nd clean unit, absorb pollutant remaining in the tail gas with moist raw material wood chip again, thoroughly cleaning of off-gas reclaims the activator in the tail gas fully.
2, described self material of active carbon by chemical method production of claim 1, raw material wood chip method for cleaning off-gas, it is characterized in that: the zinc hydroxide of use, zinc oxide, the zinc carbonate nertralizer is dry powder, fineness is greater than 100 orders, when the preparation liquor zinci chloridi, zinc chloride with nertralizer replacement 10～35%, be mixed with slurries, zinc content in the slurries still keeps the standard of conventional zinc chloride activation method, the nertralizer powder also can not be formulated in the liquor zinci chloridi, and simultaneously powder is directly sprayed among the tail gas with absorbing material, in air-flow in and hydrogen chloride form zinc chloride, be absorbed material again and absorb.
3, the described active carbon by chemical method production of claim 1 is characterized in that: use phosphoric acid activation agent activation, then without nertralizer with self material, raw material wood chip method for cleaning off-gas, when the preparation phosphoric acid solution, the acid concentration of the conventional phosphoric acid activation method of the concentration ratio of phosphoric acid solution reduces by 15～35%.
4, the described active carbon by chemical method production of claim 1 is with self material, raw material wood chip method for cleaning off-gas, it is characterized in that: as fluidizing agent tail gas, in the temperature that enters the purifier porch, should remain on and not make that material plastifies, is clamminess, the degree of blackening, tail gas is in the temperature in purifier exit, should remain within the dew-point temperature-5 ℃ of tail gas～+ 2 ℃ scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810060522A CN101543721A (en) | 2008-03-26 | 2008-03-26 | Method for purifying tail gas by using individual materials and raw material wooden meals for producing active carbon by chemical method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810060522A CN101543721A (en) | 2008-03-26 | 2008-03-26 | Method for purifying tail gas by using individual materials and raw material wooden meals for producing active carbon by chemical method |
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| Publication Number | Publication Date |
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| CN101543721A true CN101543721A (en) | 2009-09-30 |
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| CN200810060522A Pending CN101543721A (en) | 2008-03-26 | 2008-03-26 | Method for purifying tail gas by using individual materials and raw material wooden meals for producing active carbon by chemical method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515163A (en) * | 2011-12-21 | 2012-06-27 | 福建元力活性炭股份有限公司 | Method for recycling phosphoric acid from tail gas produced in carbonization and activation of active carbon in phosphoric acid process |
| CN109052394A (en) * | 2018-07-25 | 2018-12-21 | 贵州森环活性炭有限公司 | A kind of method that activated carbon of phosphoric acid method activation tail gas clean-up recycles |
-
2008
- 2008-03-26 CN CN200810060522A patent/CN101543721A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102515163A (en) * | 2011-12-21 | 2012-06-27 | 福建元力活性炭股份有限公司 | Method for recycling phosphoric acid from tail gas produced in carbonization and activation of active carbon in phosphoric acid process |
| CN109052394A (en) * | 2018-07-25 | 2018-12-21 | 贵州森环活性炭有限公司 | A kind of method that activated carbon of phosphoric acid method activation tail gas clean-up recycles |
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Open date: 20090930 |