CN109675403A - A kind of improvement VOCs waste-gas adsorbant circular regeneration technique - Google Patents
A kind of improvement VOCs waste-gas adsorbant circular regeneration technique Download PDFInfo
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- CN109675403A CN109675403A CN201910182003.4A CN201910182003A CN109675403A CN 109675403 A CN109675403 A CN 109675403A CN 201910182003 A CN201910182003 A CN 201910182003A CN 109675403 A CN109675403 A CN 109675403A
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000008929 regeneration Effects 0.000 title claims abstract description 29
- 238000011069 regeneration method Methods 0.000 title claims abstract description 29
- 239000002912 waste gas Substances 0.000 title claims abstract description 23
- 230000006872 improvement Effects 0.000 title claims abstract description 14
- 239000003463 adsorbent Substances 0.000 claims abstract description 123
- 239000007789 gas Substances 0.000 claims abstract description 110
- 238000003795 desorption Methods 0.000 claims abstract description 74
- 238000000197 pyrolysis Methods 0.000 claims abstract description 55
- 238000004064 recycling Methods 0.000 claims abstract description 4
- 238000001179 sorption measurement Methods 0.000 claims description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 23
- 239000003546 flue gas Substances 0.000 claims description 23
- 239000000779 smoke Substances 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 13
- 239000003344 environmental pollutant Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 231100000719 pollutant Toxicity 0.000 claims description 12
- 239000011449 brick Substances 0.000 claims description 11
- 238000010926 purge Methods 0.000 claims description 11
- 238000000746 purification Methods 0.000 claims description 11
- 230000001172 regenerating effect Effects 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 9
- 239000002250 absorbent Substances 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 8
- 238000012216 screening Methods 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- 238000007353 oxidative pyrolysis Methods 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000013618 particulate matter Substances 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 239000002918 waste heat Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 210000001520 comb Anatomy 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 26
- 229910052799 carbon Inorganic materials 0.000 description 22
- 239000004744 fabric Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000011261 inert gas Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 238000010924 continuous production Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000002808 molecular sieve Substances 0.000 description 4
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 210000000498 stratum granulosum Anatomy 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 229910000632 Alusil Inorganic materials 0.000 description 1
- 101001082628 Mus musculus H-2 class II histocompatibility antigen gamma chain Proteins 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000001535 kindling effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000007254 oxidation reaction Methods 0.000 description 1
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- 230000007420 reactivation Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
- B01D53/08—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds according to the "moving bed" method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to environmental protection technical fields, and in particular to a kind of improvement VOCs waste-gas adsorbant circular regeneration technique.It is characterized in that: realizing the recycling of the effective improvement and adsorbent of VOCs exhaust gas by desorption pyrolysis oven, chain conveyer grate, adsorbent moving bed, induced draught system.
Description
Technical field
The present invention relates to environmental protection technical fields, and in particular to a kind of improvement VOCs waste-gas adsorbant circular regeneration work
Skill.
Background technique
The gaseous pollutant of industrial discharge is the main source of air environmental pollution object, and wherein volatile organic compounds is useless
Gas (VOCs) is the gaseous pollutant all to environment with serious harm effect, while being also to influence operator in workplace
Health occupational source, it derives from the chemical work such as paint, coating, coating, lubricating oil, rubber extensively
Industry.Since it acts on the considerable damage of human body and natural environment, country has put into effect relevant laws and regulations and it is administered and is discharged
Carry out strict control.The currently used processing method of VOCs treatment technology has combustion method, chemical oxidization method, chemical absorbing
Method, absorption method, bioanalysis etc..Since the VOCs exhaust gas discharged in actual production process is the gaseous pollutant of low concentration, often
Administered using absorption method, but after adsorbent absorption VOCs saturation, become solid waste pollutant, common practice by its
Regeneration.(number of patent application 201210077796.1, patent name are a kind of for Wind Volume VOCs exhaust gas to Chinese invention patent
The electrothermal purifying filter element of improvement) a kind of electrothermal purifying filter element for Wind Volume VOCs waste gas pollution control and treatment is disclosed, including enclose
Protection structure and its internal adsorption bed loaded, it is characterised in that: the electrothermal purifying filter element appearance is air intake surface, outlet air
The parallel box-type shaped polyhedron structure in face, air intake surface, outlet air surface are one or more layers porous sieve plate or sieve, and described goes along with sb. to guard him knot
Structure includes hermetic unit and above-mentioned air intake surface, outlet air surface；Adsorption bed is by active carbon eyelet fabric or porous activated carbon fiber cloth
It being formed by stacking by plane compression, adsorption bed any two opposing end surface or close position are equipped with electrode A and electrode B,
It can be passed through electric current to adsorption bed, be equipped with galvanic couple in adsorption bed, the temperature of adsorption bed is tested during electrothermal heating；Or
Person, the electrothermal purifying filter element appearance are cylindrical body, and building enclosure is made of inner cylinder, end cap and outer barrel, inner cylinder
It is respectively air intake surface and outlet air surface with outer barrel, inner cylinder is hollow porous cylinder closed at one end, is closely wound work thereon
Property charcoal eyelet fabric or porous activated carbon fiber cloth formed adsorption bed, outer barrel is by one or more layers netted or porous material system
At, using end cap as electrode or in adsorption bed upper and lower end face or close position, electrode A and electrode B are set, it can be to adsorbent bed
Layer is passed through electric current, and galvanic couple is arranged in adsorption bed, and the temperature of adsorption bed is tested during electrothermal heating；The active carbon
Eyelet fabric shape of a mesh is round, ellipse or polygon, and the internal diameter in two holes of longitudinal arbitrary neighborhood is greater than its hole wall, uses
Longitudinal direction is closely wound or plane compresses the mode being superimposed and forms adsorption bed；Or laterally above the internal diameter in two holes of arbitrary neighborhood is big
In its hole wall, adsorption bed is formed in such a way that transverse direction is closely wound or plane compresses superposition；The porous active Carbon fiber
Wei Bu, the shape in hole are round, ellipse or polygon, and the internal diameter in two holes of longitudinal arbitrary neighborhood is greater than its pitch of holes, adopts
It is closely wound with longitudinal direction or plane compresses the mode being superimposed and forms adsorption bed；Or the internal diameter in two holes of lateral upper arbitrary neighborhood
Greater than its pitch of holes, adsorption bed is formed in such a way that transverse direction is closely wound or plane compresses superposition；Alternatively, described is porous
Active carbon fiber fabrics, the shape in hole are one of strip, X-shaped, cross, crescent, arc, L shape or a variety of, along longitudinal direction
Circulation of embarking on journey occurs, and projection of the immediate hole in position in both direction in length and breadth has weight in any one hole row adjacent thereto
Close, using it is vertical or horizontal be closely wound or plane compress superposition by the way of form adsorption bed；Or only projection horizontally
There is coincidence, and the projected length of hole horizontally is greater than the projector distance between laterally adjacent two hole in the longitudinal direction, or only in longitudinal direction
On projection have a coincidence, and the projected length of hole in the longitudinal direction is greater than the projector distance between longitudinally adjacent two hole horizontally, adopts
It is alternately closely wound with vertical and horizontal or plane compresses the mode being superimposed and forms adsorption bed.Chinese invention patent (patent Shen
Please number be 201510779318.9, patent name is a kind of combined type VOCs Adsorption Concentration runner and its application method) it discloses
A kind of combined type VOCs Adsorption Concentration runner and its application method, it is characterised in that: it is by molecular sieve runner and honeycomb activity
Charcoal runner is coaxial, with made of diameter docking, and the cellular activated carbon runner is located at VOCs inlet side, is laid on each runner
Adsorption zone, desorption area and cooling zone, are provided with isolation ring at the docking of two runners, and the isolation ring is used for two runners
Adsorption zone, desorption area and cooling zone separate, and again cloth wind, reduce windage；The molecular sieve runner is by spraying, eluting
Or VOCs adsorbent is attached to and to obtain on cellular web by the mode of dipping.
The prior art one proposes building enclosure for Wind Volume VOCs waste gas pollution control and treatment practical problem and air intake surface, outlet air surface are
The electrothermal purifying filter element technical solution of the adsorption bed of one or more layers porous sieve plate or sieve filling, but inhaling
Electrothermal purifying filter element, which how is replaced, in normal production after attached VOCs exhaust gas saturation does not propose solution；The prior art two
It proposes to adsorb VOCs exhaust gas using molecular sieve runner and cellular activated carbon runner for VOCs waste gas pollution control and treatment practical problem, take off
Attached, concentration, burning technical solution, is re-replaced after VOCs exhaust gas adsorption saturation is solved using the method for mechanical turning wheel
The technical solution of adsorbent is undoubtedly feasible, but this kind of dynamic equipment of runner has to solve sealing problem, especially runner
The problem of VOCs exhaust gas is leaked because of seal failure under the conditions of continuous production in replacement process.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of improvement VOCs waste-gas adsorbant circular regeneration technique,
It is characterized in:
Step 1 is desorbed near the quirk and perpendicular road of pyrolysis oven and builds block, and desorption pyrolysis furnace body is divided into up and down by centre partition arch
Pyrolysis zone is desorbed in twoth area, the area Ji Shang, and quirk is divided into two upper and lower chambers i.e. pyrolysis chamber, regenerative chamber, perpendicular road is divided by the heat-accumulating area Xia Qu
High aluminium ball filler is filled by two upper and lower chambers, that is, desorption chamber, sealing room, pyrolysis chamber, and high aluminium ball filler particles 20~25mm of diameter passes through
Feeding system conveys adsorbent to be desorbed to the desorption pyrolysis road furnace body Zhong Shu, and absorbent particles should be able to be suitable from perpendicular road and dipleg
Benefit, which falls and ensures that high-temperature flue gas does not scurry out from dipleg bottom and passes through double-edged fine-toothed comb brick, flows into smoke evacuation header through pyrolysis chamber, high
Warm flue gas enters heating desorption pyrolysis furnace body from collection flue and keeps its temperature at 260~280 DEG C, adjusts the excess of high-temperature flue gas
Air coefficient makes its oxygen content not less than 14%, adjusts the chain wheel speed of chain conveyer grate, absorbent particles is enable uniformly to spread out
It is taped against on chain conveyer grate row, thickness is no more than 10mm.
Step 2, feeding system is operated normally to be fed to perpendicular road, and adsorbent is under gravity from top to bottom in perpendicular road
Interior continuous moving, be heated evolution VOCs exhaust gas in desorption chamber, and the recycling tail gas of the discharge of pyrolysis chamber is infused wind collection by note wind header
Case is barotropic state, and pressure is 100~150Pa, and indoor adsorbent is desorbed in tail gas purging, then mixes with the VOCs exhaust gas of desorption
Pyrolysis chamber's oxidative pyrolysis, the VOCs that high-temperature flue gas is sent to pyrolysis chamber and desorption through collecting flue are sent to by desorption chamber bottom double-edged fine-toothed comb brick
Exhaust gas mixing, the excessive oxygen in high-temperature flue gas is oxidized pyrolysis herein, and tail gas flows into smoke evacuation header, and smoke evacuation header is
Negative pressure state, pressure are -100~150Pa, then to smoke stack emission after waste heat recycles, the tail gas of discharge is collected through note wind header
Perpendicular road is re-entered in reuse, and reflux ratio is designed as 1:10.
Step 3, continuous moving uniformly paves through dipleg to chain conveyer grate the adsorbent after desorption under gravity
On row, adsorbent temperature is higher than 250 DEG C at this time, and air distribution plate will be introduced through adsorbent moving bed treated emission, tail gas
In VOCs pollutant be adsorbed purification, for desorption after adsorbent for, be excellent inert gas, to adsorbent
Activating and regenerating does not influence, and ensure that adsorption efficiency, and the temperature of tail gas is suitable with environment temperature, is excellent coolant, tail gas
Gap through adjacent grate screening flows into that purging is cooling to pave to the adsorbent on chain conveyer grate row, rapidly and absorbent particles
The process of mass-and heat-transfer is completed, then the smoke outlet discharge through kiln case again.
The adsorbent of chain conveyer grate activating and regenerating is sent into the mobile bed body of adsorbent, runs distributing device and drive by step 4
Dynamic device, adsorbent fall in gravity with mobile with the help of unloading charging tray, and VOCs exhaust gas is introduced in central tube and passed through through support arcs
Ventilation hole is sent out to adsorbent bed, and the particulate matter that adsorbent absorption VOCs exhaust gas tends to saturation, trapping VOCs exhaust gas carries is filled out
Filling mutual gap causes bed pressure drop to increase, and the voltage drop value of design is constantly kept by the adsorbent that distributing device supplement updates,
Adsorbent is mobile collect cone bucket after be discharged through dipleg, then send desorption pyrolysis oven to carry out desorption pyrolysis processing, adsorbent from
It hinders VOCs exhaust gas as packing seal while dipleg is discharged to scurry out to the mobile bed body bottom of adsorbent, to guide
VOCs exhaust gas discharges after adsorbent bed purification from exhaust tube upwards, and the tail gas discharged from exhaust tube is drawn back through induced draught system
With chain conveyer grate is sent into, cooling activation paves to the adsorbent on chain conveyer grate row, and reflux ratio control is in 1:10~1:5.
Inventors have found that solve continuing purge VOCs exhaust gas technical problem under the conditions of continuous production, need adsorbent
Filler constantly keeps phase border to contact with VOCs exhaust gas, and disengages in time before saturation, can be mobile using stratum granulosum
Continuous moving, VOCs exhaust gas are constant under from top to bottom under gravity for bed filter working principle, i.e. adsorbent
And upper conveying is contacted with adsorbent holding phase border and mass-transfer efficiency, the mobile bed body of adsorbent is that static equipment can solve to seal very well
Problem, adsorbent and VOCs exhaust gas persistently keep the contact of phase border to solve the existing practical problem of continuous production.Due to adsorbent bed
Layer design has certain height, how in adsorbent bed even distributing wind and to guarantee wind-distributing pipe road not because VOCs exhaust gas is self-contained
Particulate matter sedimentation dust stratification cause line clogging to be to need the another actual techniques problem that solves, therefore in the mobile bed body of adsorbent
Central tube is inside devised, central tube peripheral wall is uniformly distributed ventilation hole diagonally downward, and top design is cone, and bottom design has
Grey leakage port.Central tube is located in the center of the mobile bed body of adsorbent by support arcs, is hollow structure in support arcs, can be by VOCs
Exhaust gas introduces in central tube.The mobile lower backwardness of adsorbent collects in cone bucket, to prevent exhaust gas from scurrying out through cone bucket, devises longer
Dipleg, adsorbent from dipleg be discharged while as packing seal hinder VOCs exhaust gas to adsorbent move bed body bottom
Portion scurries out, so that VOCs exhaust gas be guided to discharge after adsorbent bed purification from exhaust tube upwards.
Inventors have found that VOCs exhaust gas, after adsorbent bed purification, VOCs exhaust gas is increased by adsorbent bed pressure drop
Add, and various concentration VOCs exhaust gas and the wired sexual intercourse of adsorbent bed pressure drop, in other words VOCs waste air ventilation flow is kept
In the case where constant, VOCs exhaust gas concentration and adsorbent bed pressure drop can form working curve, can be by adjusting absorption
The inlet amount of agent realizes the efficient target using with continuing purge VOCs exhaust gas of adsorbent.
Inventors have found that the VOCs extensively from the discharge of the chemical industry such as paint, coating, coating, lubricating oil, rubber is useless
The main feature of gas is exactly that low concentration, Wind Volume are disappeared if carrying out purified treatment by this reliable method of oxidizing fire
The thermal energy of consumption is higher, does not meet energy conservation and economic principle.And be desorbed after adsorbent is adsorbed to saturation, it on the one hand realizes and inhales
Attached dose of regeneration avoids the generation of solid waste, and on the other hand it is higher to generate VOCs exhaust gas concentration for desorption, it can be understood as
Former low concentration VOCs exhaust gas realizes the process of concentration, has the condition of oxidizing fire purified treatment.
Inventors have found that adsorbent is the basis that VOCs exhaust gas adsorption separation process is achieved, at present in VOCs exhaust gas
The common adsorbent in adsorbing separation field mainly has molecular sieve, active carbon class, Alusil class, carbon molecules class etc..Actually make
With in the process, active carbon is preferentially used because having following features: one it be for complete separation in purification process
The industrial adsorbents for removing moisture in advance are not needed uniquely；Secondly it has great inner surface, active carbon is than other adsorbents
It can more nonpolar and low pole the organic molecules of absorption；Thirdly the heat of adsorption of active carbon or the intensity of key are usually than other suctions
Attached dose low, thus is relatively easy to the parsing for being adsorbed molecule, and energy consumption when adsorbent reactivation is relatively low.Above-mentioned paint, coating,
The chemical industry such as coating, lubricating oil, rubber generate the usual humidity of VOCs exhaust gas it is higher, typical pollutant for example benzene, paraxylene,
Carbon tetrachloride is the organic molecule of nonpolarity and low pole, must be using active carbon to its adsorption cleaning.
Inventors have found that VOCs exhaust gas is after acticarbon is adsorbed to saturation generally using the method desorption of heating
Regeneration, generally can not be regenerated by way of directly contacting with high-temperature flue gas, because having adsorbed the active carbon kindling of VOCs exhaust gas
Point is lower, and active carbon is easily oxidized (burning), needs to realize that active carbon is desorbed by the way of indirect heating, is pyrolyzed in desorption
In furnace, the VOCs exhaust gas of desorption is brought out to be mixed with high-temperature flue gas, and contaminant component, that is, organic molecule in VOCs exhaust gas is by oxygen
Change (burning), generates the CO of environmental sound2、H2O；Active carbon is moved to chain conveyer grate, will be after the processing of adsorbent moving bed
Emission reuse purges active carbon with tail gas and cools down, to realize acticarbon desorption and regeneration.
Inventors have found that volatile organic compounds (VOCs) be generally referred to as fusing point lower than room temperature and boiling point 50~
Volatile organic compounds between 250 DEG C, that is to say, that the desorption temperature of adsorbent should be greater than 250 DEG C, adsorbent after desorption
It must carry out cooling and reach room temperature, to complete the process of desorption and regeneration, emission will be returned after the processing of adsorbent moving bed
It is used as coolant, tail gas is undoubtedly made to obtain high-value-use and relatively inexpensive.
Inventors have found that the desorption pyrolysis oven design of VOCs waste-gas adsorbant has quirk and perpendicular road, quirk is for high-temperature flue gas stream
It is logical, it erects road and falls for adsorbent is mobile, build block near quirk and perpendicular road.Desorption pyrolysis furnace body is divided into up and down by centre partition arch
Pyrolysis zone, the heat-accumulating area Xia Qu is desorbed in twoth area, the area Ji Shang.Corresponding quirk is also classified into two upper and lower chambers, and lower room is regenerative chamber, and being responsible for will collection
Upper chamber is sent in the high-temperature flue gas introducing of flue, and upper chamber is pyrolysis chamber, accumulates high alumina ball particle, high-temperature flue gas and passes through heat herein
The VOCs exhaust gas mixing for the desorption that room bottom double-edged fine-toothed comb brick introduces is solved, the excessive oxygen in high-temperature flue gas is oxidized pyrolysis, tail
Gas flows into smoke evacuation header, and tail gas is after waste heat recycles to smoke stack emission；Similarly accordingly perpendicular road is also classified into two upper and lower chambers, and lower room is close
Room is sealed, effect is to prevent the VOCs exhaust gas of desorption from scurrying out from perpendicular road bottom, and upper chamber is desorption chamber, is connect with feeding system, is adsorbed
The continuous moving in perpendicular road, feeding system include storage tank, note wind header from top to bottom under gravity for agent, and note wind header will
The tail gas of the discharge of quirk introduces purging adsorbent, then mixes with the VOCs exhaust gas of desorption and be sent to by desorption chamber bottom double-edged fine-toothed comb brick
Pyrolysis chamber's oxidative pyrolysis.
Inventors have found that the active carbon ignition point for having adsorbed VOCs exhaust gas is lower, active carbon is easily oxidized (burning), is needed
It to realize that active carbon is desorbed by the way of indirect heating, in desorption pyrolysis oven, build block, high-temperature flue gas near quirk and perpendicular road
Quirk is flowed through, the active carbon heating to perpendicular road is realized, the VOCs exhaust gas after desorption is sent to heat by desorption chamber bottom double-edged fine-toothed comb brick
Solution room oxidative pyrolysis, and the tail gas of discharge of the air-flow from quirk purged, and the tail gas of the discharge of quirk is that oxygen amount is lower
Inert gas, to ensure that active carbon is not oxidized and keeps activity, the reuse of the tail gas of the discharge of quirk reduces pollutant
High-value-use is also achieved while discharge.
Inventors have found that the adsorbent after heated desorption, which must carry out cooling, reaches room temperature, heat of adsorption is discharged, it can be complete
At the process of desorption and regeneration, cooling air-flow is at the emission after the processing of adsorbent moving bed, selected adsorbent moving bed
The main reason of emission reuse after reason has: first, the tail gas through adsorbent moving bed processing after to environmental emission, it is therein
VOCs pollutant has been adsorbed purification, is excellent inert gas for the adsorbent after desorption, the activation to adsorbent
Regeneration does not influence, and ensure that adsorption efficiency；Second, the temperature of tail gas is suitable with environment temperature, it is excellent coolant.It is above-mentioned
Two features enable tail gas directly to contact abundant mass-and heat-transfer with the adsorbent after heating desorption.
Inventors have found that being needed higher strong since adsorbent needs to bear the variation of air-flow washed away with temperature, pressure
Degree and wearability, the device for designing cooling activation should avoid the mutual collision friction of absorbent particles from reaching as far as possible prevents it broken
Purpose, chain conveyer grate should be able to solve one of scheme of prior art problem.The design of chain conveyer grate has dipleg, chain to pass
Dynamic grate body.Continuous moving uniformly paves through dipleg onto chain conveyer grate row adsorbent after desorption under gravity,
Adsorbent plays sealing as the filler in dipleg simultaneously, and the VOCs exhaust emission after preventing desorption is scurried out from dipleg.
The design of chain conveyer grate body has kiln case, chain conveyer grate row, and the kiln case design has smoke outlet, and chain conveyer grate row includes chain
Wheel, chain, grate row, air distribution plate, grate row include lateral pin, grate screening, and grate screening passes through lateral pin arrangement bunchiness piecewise, preceding
Grate screening is staggeredly correspondingly connected with to form grate row by lateral pin afterwards, and the both ends of lateral pin are fixedly arranged on chain, sprocket wheel drive chain
Rotation is to drive grate row's movement.Air distribution plate will be introduced through adsorbent moving bed treated emission, through adjacent grate
The gap of screening is sent into kiln case, and purging is cooling to pave to the adsorbent on chain conveyer grate row, then discharges through smoke outlet.
Compared with the existing technology, the present invention, which at least contains, has the advantage that first, and volatile organic compounds (VOCs) is general
Refer to fusing point lower than room temperature volatile organic compounds of the boiling point between 50~250 DEG C, that is to say, that adsorbent it is de-
Enclosure temperature should be greater than 250 DEG C, and adsorbent, which must carry out cooling down, after desorption reaches room temperature, so that the process of desorption and regeneration is completed, it will
Discharge recycling tail gas undoubtedly makes tail gas acquisition high-value-use and relatively inexpensive as coolant after the processing of adsorbent moving bed；
Second, the active carbon ignition point for having adsorbed VOCs exhaust gas is lower, and active carbon is easily oxidized (burning), needs using indirect heating
Mode realize active carbon be desorbed, desorption pyrolysis oven in, blocks is built near quirk and perpendicular road, high-temperature flue gas flows through quirk, realization
The active carbon in the road Liao Duishu heats, and the VOCs exhaust gas after desorption is sent to pyrolysis chamber's oxidative pyrolysis by desorption chamber bottom double-edged fine-toothed comb brick,
And the tail gas of discharge of the air-flow from quirk purged, and the tail gas of the discharge of quirk is the lower inert gas of oxygen amount, thus
It ensure that active carbon is not oxidized and keeps activity, the reuse of the tail gas of the discharge of quirk reduces also real while pollutant emission
High-value-use is showed；Third, the adsorbent after heated desorption must carry out it is cooling reach room temperature, discharge heat of adsorption, can be complete
At the process of desorption and regeneration, cooling air-flow is at the emission after the processing of adsorbent moving bed, selected adsorbent moving bed
The main reason of emission reuse after reason has: first, the tail gas through adsorbent moving bed processing after to environmental emission, it is therein
VOCs pollutant has been adsorbed purification, is excellent inert gas for the adsorbent after desorption, the activation to adsorbent
Regeneration does not influence, and ensure that adsorption efficiency；Second, the temperature of tail gas is suitable with environment temperature, it is excellent coolant.It is above-mentioned
Two features enable tail gas directly to contact abundant mass-and heat-transfer with the adsorbent after heating desorption；4th, using stratum granulosum
Continuous moving, VOCs exhaust gas are constant from top to bottom under gravity for moving bed filter working principle, i.e. adsorbent
Conveying from bottom to top is contacted with adsorbent holding phase border and mass-transfer efficiency, and the mobile bed body of adsorbent is that static equipment can solve very well
Sealing problem, adsorbent and VOCs exhaust gas persistently keep the contact of phase border to solve the existing practical problem of continuous production.
Detailed description of the invention
Fig. 1 is a kind of schematic view of the front view for administering VOCs waste-gas adsorbant circular regeneration technique of the present invention.
Fig. 2 is a kind of A-A section arragement construction schematic diagram for administering VOCs waste-gas adsorbant circular regeneration technique of the present invention.
Fig. 3 is a kind of B partial enlargement structural representation for administering VOCs waste-gas adsorbant circular regeneration technique of the present invention.
Fig. 4 is a kind of C partial enlargement structural representation for administering VOCs waste-gas adsorbant circular regeneration technique of the present invention.
Fig. 5 is a kind of D partial enlargement structural representation for administering VOCs waste-gas adsorbant circular regeneration technique of the present invention.
Fig. 6 is a kind of E-E section arragement construction schematic diagram for administering VOCs waste-gas adsorbant circular regeneration technique of the present invention.
Fig. 7 is a kind of F partial enlargement structural representation for administering VOCs waste-gas adsorbant circular regeneration technique of the present invention.
I-desorption II-chain conveyer of pyrolysis oven grate, III-induced draught system, IV-adsorbent moving bed
1- feeding system 2- storage tank 3- infuses wind header 4- smoke evacuation header
5- desorption pyrolysis furnace body 6-, which is erected, separates arch among road 7- quirk 8- double-edged fine-toothed comb brick 9-
10- collection flue 11- pyrolysis chamber 12- desorption chamber 13- regenerative chamber 14- seals room
15- dipleg 16- chain conveyer grate body 17- smoke outlet 18- kiln case 19- chain
20- air distribution plate 21- sprocket wheel 22- chain conveyer grate arranges 23- grate screening 24- lateral pin
25- grate row 26- driving device 27- unloads charging tray 28- support arcs
29- adsorbent moves bed body 30- central tube 31- ventilation hole 32- distributing device
33- exhaust tube 34- dipleg 35- cone bucket 36- grey leakage port.
Specific embodiment
The present invention is described further with specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, a kind of improvement VOCs waste-gas adsorbant circular regeneration technique,
It is characterized in that:
Step 1 is desorbed near the quirk 7 and perpendicular road 6 of pyrolysis oven I and builds block, and centre partition arch 9, which divides desorption pyrolysis furnace body 5, is
Pyrolysis zone is desorbed in upper and lower twoth area, the area Ji Shang, and the heat-accumulating area Xia Qu divides quirk 7 for two upper and lower chambers i.e. pyrolysis chamber 11, regenerative chamber 13,
Perpendicular road 6 is divided for two upper and lower chambers i.e. desorption chamber 12, sealing room 14, the filling of pyrolysis chamber 11 high aluminium ball filler, high aluminium ball filler particles
20~25mm of diameter conveys adsorbent to be desorbed, adsorbent to desorption pyrolysis 5 road Zhong Shu 6 of furnace body by feeding system 1
Grain should be able to smoothly fall from perpendicular road 6 and dipleg 15 and ensure that high-temperature flue gas does not scurry out from 15 bottom of dipleg and passes through double-edged fine-toothed comb
Brick 8 flows into smoke evacuation header 4 through pyrolysis chamber 11, and high-temperature flue gas enters heating desorption pyrolysis furnace body 5 from collection flue 10 and keeps its temperature
Degree adjusts the excess air coefficient of high-temperature flue gas at 260~280 DEG C, makes its oxygen content not less than 14%, adjusts chain conveyer grate
II 21 revolving speed of sprocket wheel enables absorbent particles uniformly to pave onto chain conveyer grate row 22, and thickness is no more than 10mm.
Step 2, feeding system 1 is operated normally to be fed to perpendicular road 6, and adsorbent is under gravity from top to bottom perpendicular
Continuous moving in road 6, be heated evolution VOCs exhaust gas in desorption chamber 12, and note wind header 3 returns the tail gas of the discharge of pyrolysis chamber 11
Be barotropic state with, note wind header 3, pressure is 100~150Pa, and tail gas purges the adsorbent in desorption chamber 12, then with desorption
The mixing of VOCs exhaust gas is sent to 11 oxidative pyrolysis of pyrolysis chamber by 12 bottom double-edged fine-toothed comb brick 8 of desorption chamber, and high-temperature flue gas is sent through collecting flue 10
It is mixed toward pyrolysis chamber 11 with the VOCs exhaust gas of desorption, the excessive oxygen in high-temperature flue gas is oxidized pyrolysis, tail gas herein
Smoke evacuation header 4 is flowed into, smoke evacuation header 4 is negative pressure state, and pressure is -100~150Pa, then to smoke stack emission after waste heat recycles,
The tail gas of discharge collects reuse through note wind header 3 and re-enters perpendicular road 6, and reflux ratio is designed as 1:10.
Step 3, continuous moving uniformly paves to chain conveyer through dipleg 15 and combs under gravity for adsorbent after desorption
On bed row 22, adsorbent temperature is higher than 250 DEG C at this time, and air distribution plate 20 will treated that emission draws through adsorbent moving bed IV
Enter, it is excellent inert gas for the adsorbent after desorption that the VOCs pollutant in tail gas, which has been adsorbed purification, right
The activating and regenerating of adsorbent does not influence, and ensure that adsorption efficiency, and the temperature of tail gas is suitable with environment temperature, is excellent cooling
Agent, tail gas flow into the cooling adsorbent arranged on 22 that paves to chain conveyer grate of purging through the gap of adjacent grate screening 23, rapidly
The process of mass-and heat-transfer is completed with absorbent particles, then the smoke outlet 17 through kiln case 18 discharges again.
The adsorbent of II activating and regenerating of chain conveyer grate is sent into the mobile bed body 29 of adsorbent, runs distributing device by step 4
32 and driving device 26, adsorbent falls gravity and unload charging tray 27 with the help of are mobile, and VOCs exhaust gas is introduced through support arcs 28
It is sent out in central tube 30 and through ventilation hole 31 to adsorbent bed, it is useless that adsorbent absorption VOCs exhaust gas tends to saturation, trapping VOCs
The particulate matter that gas carries, which fills mutual gap, causes bed pressure drop to increase, the adsorbent constantly updated by the supplement of distributing device 32
It is discharged after keeping the voltage drop value of design, adsorbent movement to collect cone bucket 35 through dipleg 34, desorption pyrolysis oven I is then sent to carry out
Pyrolysis processing is desorbed, hinders VOCs exhaust gas to adsorbent movement as packing seal while adsorbent is discharged from dipleg 34
29 bottom of bed body is scurried out, to guide VOCs exhaust gas to discharge after adsorbent bed purification from exhaust tube 33 upwards, from exhaust tube
The tail gas of 33 discharges draws reuse through induced draught system III and is sent into chain conveyer grate II, and cooling activation paves to chain conveyer grate row 22
On adsorbent, reflux ratio control in 1:10~1:5.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to the specific embodiments disclosed and described above, to of the invention
Some modifications and changes should also be as falling into the scope of the claims of the present invention.In addition, although being used in this specification
Some specific terms, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (6)
1. a kind of improvement VOCs waste-gas adsorbant circular regeneration technique, it is characterized in that: step 1, is desorbed the quirk of pyrolysis oven and erects
Block is built near road, desorption pyrolysis furnace body is divided into twoth area up and down by centre partition arch, and pyrolysis zone, the accumulation of heat of lower area is desorbed in the area Ji Shang
Quirk is divided into two upper and lower chambers i.e. pyrolysis chamber, regenerative chamber by area, and perpendicular road is divided into two upper and lower chambers i.e. desorption chamber, sealing room, pyrolysis
High aluminium ball filler is filled in room, and high aluminium ball filler particles 20~25mm of diameter is perpendicular into desorption pyrolysis furnace body by feeding system
Road conveys adsorbent to be desorbed, and absorbent particles should be able to smoothly fall from perpendicular road and dipleg and ensure high-temperature flue gas not from material
Leg bottom, which scurries out and passes through double-edged fine-toothed comb brick, flows into smoke evacuation header through pyrolysis chamber, adjusts the chain wheel speed of chain conveyer grate, makes to inhale
Attached dose of particle can uniformly pave onto chain conveyer grate row, and thickness is no more than 10mm；Step 2, feeding system operate normally to
Perpendicular road feed, adsorbent are erecting continuous moving in road from top to bottom under gravity, and be heated evolution VOCs in desorption chamber
Indoor adsorbent, then the VOCs with desorption is desorbed in the recycling tail gas of the discharge of pyrolysis chamber, tail gas purging by exhaust gas, note wind header
Exhaust gas mixing is sent to pyrolysis chamber's oxidative pyrolysis by desorption chamber bottom double-edged fine-toothed comb brick, and high-temperature flue gas is collected flue and is sent to pyrolysis chamber and takes off
Attached VOCs exhaust gas mixing, the excessive oxygen in high-temperature flue gas is oxidized pyrolysis herein, and tail gas flows into smoke evacuation header, then
To smoke stack emission after waste heat recycles；Step 3, continuous moving is uniform through dipleg under gravity for the adsorbent after desorption
Pave to chain conveyer grate row on, at this time adsorbent temperature be higher than 250 DEG C, air distribution plate will through adsorbent moving bed treated row
Tail gas introducing is put, it is excellent inertia for the adsorbent after desorption that the VOCs pollutant in tail gas, which has been adsorbed purification,
Gas does not influence the activating and regenerating of adsorbent, ensure that adsorption efficiency, and the temperature of tail gas is suitable with environment temperature, is excellent
Good coolant, tail gas flow into the cooling adsorbent arranged to chain conveyer grate that paves of purging through the gap of adjacent grate screening,
The process of mass-and heat-transfer is completed with absorbent particles rapidly, then the smoke outlet discharge through kiln case again；Step 4 combs chain conveyer
The adsorbent of bed activating and regenerating is sent into the mobile bed body of adsorbent, runs distributing device and driving device, adsorbent is in gravity and discharging
Mobile with the help of disk to fall, VOCs exhaust gas is introduced in central tube through support arcs and is sent out through ventilation hole to adsorbent bed, is inhaled
The particulate matter that attached dose of absorption VOCs exhaust gas tends to saturation, trapping VOCs exhaust gas carries, which fills mutual gap, causes bed pressure drop to increase
Add, the voltage drop value of design is constantly kept by the adsorbent that distributing device supplement updates, adsorbent movement collects after cone bucket through expecting
Tube sealing discharge, then send desorption pyrolysis oven to carry out desorption pyrolysis processing, and adsorbent is close as filler while discharge from dipleg
Envelope hinders VOCs exhaust gas and scurries out to the mobile bed body bottom of adsorbent, to guide VOCs exhaust gas upwards through adsorbent bed purification
It is discharged afterwards from exhaust tube.
2. a kind of improvement VOCs waste-gas adsorbant circular regeneration technique according to claim 1, it is characterized in that: note wind header
For barotropic state, pressure is 100~150Pa.
3. a kind of improvement VOCs waste-gas adsorbant circular regeneration technique according to claim 1, it is characterized in that: high-temperature flue gas
Enter heating desorption pyrolysis furnace body from collection flue and keep its temperature at 260~280 DEG C, adjusts the excess air system of high-temperature flue gas
Number makes its oxygen content not less than 14%.
4. a kind of improvement VOCs waste-gas adsorbant circular regeneration technique according to claim 1, it is characterized in that: smoke evacuation header
For negative pressure state, pressure is -100~150Pa.
5. a kind of improvement VOCs waste-gas adsorbant circular regeneration technique according to claim 1, it is characterized in that: the tail of discharge
Gas collects reuse through note wind header and re-enters perpendicular road, and reflux ratio is designed as 1:10.
6. a kind of improvement VOCs waste-gas adsorbant circular regeneration technique according to claim 1, it is characterized in that: from exhaust tube
The tail gas of discharge draws reuse through induced draught system and is sent into chain conveyer grate, and cooling activation paves to the absorption on chain conveyer grate row
Agent, reflux ratio are controlled in 1:10~1:5.
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