CN100496678C - Combined purification method for effluvial exhaust air - Google Patents
Combined purification method for effluvial exhaust air Download PDFInfo
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- CN100496678C CN100496678C CNB2006100464410A CN200610046441A CN100496678C CN 100496678 C CN100496678 C CN 100496678C CN B2006100464410 A CNB2006100464410 A CN B2006100464410A CN 200610046441 A CN200610046441 A CN 200610046441A CN 100496678 C CN100496678 C CN 100496678C
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Abstract
The invention relates to the comprehensive purification method for foul odor. It categorizes the foul odor from various sources by VOC density. Low density VOC waste is cleaned first, the absorption purification to achieve tail gas emission standard, sewage treatment for the cleaned waste water. The desorption resurgent gases is mixed with high density VOC waste for density average, burning and purification. It can effectively purify waste gases from various sources and features, with simple process, good purification effect, low energy consumption and easy operation.
Description
Technical field
The present invention relates to a kind of comprehensive purifying method of foul waste gas, it is the comprehensive purifying processing method of the multiple variety classes foul waste gas of enterprise's sewage collection transmission such as comprehensive purifying processing method, particularly oil refining of different types of foul waste gas of producing of sewage disposal system and treatment system generation.
Background technology
In enterprises such as oil refining, chemical industry, there are multiple production unit or facility can produce foul waste gas, become the important pollution sources of this type of enterprise.Enterprise odor pollution sources such as oil refining, chemical industry mainly contain storage tank volatilization, sewage disposal system loss etc.The pollution sources difference, the composition and the concentration of its foul waste gas also differ greatly, and along with the variation of operating condition and weather bigger variation are arranged.Bring big difficulty therefore for the purified treatment of these waste gas.Major pollutants in the foul waste gas comprise: VOC (VOC), hydrogen sulfide, ammonia etc.
In the prior art, the method of handling foul waste gas is mainly absorption process, absorption method, microbial method, firing method etc., but these methods all have certain specific aim, all are to handle at certain waste gas, can not carry out comprehensive purifying to the foul waste gas of enterprise's number of different types and handle.
CN 1217952A adopts microbial method to purify foul waste gas, and the odorant in the waste gas is mainly the hydrogen sulfide sulfides, and requires the concentration of odorant can not be too high.CN 1242258A adopts the adsorption method for purifying foul waste gas, also only specially sulfur series foul smell gas by using is handled.
Firing method is a kind of effective ways that purify flammable organic exhaust gas, and this method is particularly suitable for that concentration is not high, component is complicated and does not have the improvement of the organic exhaust gas of recovery value.The combustion method that is usually used in the organic exhaust gas processing has direct burning, flame combustion, catalytic combustion, heat-accumulation combustion and heat-storage catalytic burning etc.Catalytic combustion is owing to use catalyst, so combustion reaction carries out under the temperature more much lower than ordinary combustion, is CO making most of organic matter complete oxidation below 400 ℃ generally
2And H
2O, and can not produce NO
xAnd cause secondary pollution; Heat-accumulation combustion can efficiently utilize the organic combustion heat, and 600～900 ℃ of ignition temperatures do not have sulfide, the halide poisoning problem of catalyst for catalytic combustion, but the temperature height may produce NO
xThe heat-storage catalytic burning combines some technical characterstics of catalytic combustion and heat-accumulation combustion.Production by Catalytic Combustion Process and heat-accumulation combustion method are to use two kinds of more organic exhaust gas combustion technologies at present.Production by Catalytic Combustion Process purifies foul waste gas as described in the CN1127369C.Usually, Production by Catalytic Combustion Process, heat-accumulation combustion method, heat-storage catalytic firing method purify foul waste gas needs in the waste gas organic matter to keep certain concentration, usually more than 1000～2000 μ L/L, to keep necessary reaction temperature, the waste gas that concentration is very low is unwell to these methods of employing and purifies, and its reason is that energy consumption is too big.As CN96194725 a kind of low-concentration organic exhaust gas catalytic combustion purifying treatment method is proposed, it carries out the catalytic combustion processing need add a certain amount of combustible fluid in air-flow after, the combustible fluid that adds, provide sufficient reactant though can be catalytic oxidation, keep suitable reaction temperature, but increased plant energy consumption.US6019952 discloses a kind of purification method of organic exhaust gas, will contain the waste gas absorption of organic workshop and concentrate, and with the catalyst for catalytic combustion that contains molecular sieve it is purified then.But because the desorption concentrated gas after the adsorption treatment generally is intermittently to produce, can not satisfy the continued operation requirement of catalytic combustion system, and organic concentration also is unfavorable for the stable operation of catalytic combustion system with the altering a great deal of desorption process in the desorption concentrated gas.
Summary of the invention
At the deficiencies in the prior art, the invention provides the comprehensive purifying processing method of one kind of multiple dissimilar foul waste gas.The inventive method has that flow process is simple, purified treatment is effective, low power consumption and other advantages.
The inventive method comprises following content:
(1) foul waste gas of enterprise such as will refine oil carries out categorised collection: high VOC concentration foul waste gas, main source comprise regulating reservoir, oil interceptor, floation tank or volatile materials storage tank etc.; Low VOC concentration foul waste gas, main source comprises sewage biochemical purification processing unit or Treatment of Sludge unit etc.
(2) high VOC concentration foul waste gas purification process technique is comprised concentration homogenizing and burning;
(3) will hang down VOC concentration foul waste gas purification process technique and comprise washing and absorption, washings are from the sewage-farm, and the pollutant that washing absorbs comprises sulfide, ammonia or phenol etc., and the sewage behind the absorption pollutant returns the sewage-farm and handles; The foul waste gas of regeneration desorption gas and high VOC concentration carries out purified treatment jointly in step (2).
Wherein high VOC concentration foul waste gas described in the step (1) and low VOC concentration waste gas generally can be by arbitrary numerical division in mean concentration 100～1500 μ L/L, and for example to be higher than the waste gas of 1000 μ L/L (or in 500～1500 μ L/L arbitrary numerical value) be high VOC concentration waste gas to mean concentration.Can reach more than the 3000 μ L/L as the VOC concentration in the foul waste gas of generations such as oil interceptor, and the VOC concentration in the foul waste gas that sewage biochemical treatment aeration tank produces is generally below 500 μ L/L.The waste gas of other pollution sources also can be classified by above-mentioned, includes in and carries out the comprehensive purifying processing in the technology of the present invention.Those skilled in the art can determine the concrete division of high and low VOC concentration waste gas according to factors such as the composition of waste gas, flows, and basic principle is to keep to have certain VOC concentration in the waste gas that burns, more than 1000 μ L/L, more than the best 2000 μ L/L.For example: if the exhaust gas flow of low VOC concentration is less, and the exhaust gas flow of high VOC concentration is bigger, then divides the boundary line can suitably hang down, otherwise then suitably high.For general oil refining, chemical enterprise, be that the division boundary line of high and low concentration waste gas suits with 1000 μ L/L.
Combustion technology in the step (2) can adopt the aflame a kind of technology of existing catalytic combustion, heat-accumulation combustion and heat-storage catalytic.When adopting the burning of catalytic combustion and heat-storage catalytic, when organic concentration is carried out homogenising, also want desulfurization, prevent the catalyst for catalytic combustion poisoning.Introduce as technology such as CN 1127369C, CN 1611291A, CN 1393283A.A kind of concrete scheme is as follows: waste gas is handled through over-richness homogenizing, desulfurization and catalyticing combustion process.Concentration homogenizing and desulfurization are handled and can be finished in a step, also can finish in two steps.The effect of exhaust gas concentration homogenizing is that to make organic concentration have concentration than the waste gas of great fluctuation process to be tending towards homogeneous steady, avoids combustible component concentration to increase suddenly or reduce and causes the big ups and downs of catalytic combustion reactor temperature, prolongs catalyst and reactor service life.The concentration homogenizing can be carried out in the concentration homogenizer, is generally the tank container of metal material, air inlet is arranged below it, and the gas outlet is arranged above, the material that inner filling has the concentration homogenization.Material with concentration homogenization generally is the stronger material of adsorptivity, comprise one or more combination of active carbon, molecular sieve, silica gel, aluminium oxide and diatomite etc., each material needs to become specific shape through forming processes mostly, as various suitable shapes such as sphere, strip, sheet, hollow cylindrical, gear-like, trilobals, also can be powder or graininess.When add before these material moulding or after the moulding or the dipping chemical reagent, make contain alkali, alkaline metal oxide or slaine in the finished product after, they have desulphurizing ability simultaneously.
The principle that the concentration homogenizer plays the concentration homogenization is: adsorbent has the adsorption and desorption effect to organic matter, if organic concentration is stable in the waste gas, and adsorbent is in poised state to organic adsorption and desorption, so, waste gas is by after adsorbent bed, and organic concentration does not change; Suppose that at this state, the organic concentration in the waste gas raises suddenly, so, original adsorption and desorption balance is destroyed, and adsorbent begins to increase organic adsorbance, and therefore, by adsorbent bed, the organic concentration in the waste gas can decrease; Otherwise the organic concentration in the waste gas reduces suddenly, and adsorbent begins the desorb organic matter, can increase to some extent by the organic concentration in the waste gas after adsorbent bed.Adsorbent character and loadings need be according to the fluctuating ranges of the matter property in the waste gas, concentration, concentration, and the exhausted air quantity size decides.Generally speaking, when the higher and fluctuation of concentration of organic exhaust gas concentration was big, the loadings of required adsorbability material was bigger.The operation air speed of concentration homogenizer is 100～15000h
-1
The desulphurization mechanism of desulfurizing agent comprises physical absorption, chemisorbed and catalyzed conversion effect.Desulfurizing agent is a desulfurizing agent commercially available or that make by prior art, desulfurizing agent can be special-purpose desulfurizing agent, also can be the desulfurizing agent that organic matter is had the adsorption and desorption function, FSTS-3 type desulfurization and the total hydrocarbon concentration levelling agent produced of Fushun Petrochemical Research Institute for example.The main component of desulfurizing agent is chemical substances such as iron oxide, zinc oxide, NaOH, potassium hydroxide, calcium hydroxide, magnesium hydroxide, cupric oxide, aluminium oxide, active carbon and composition thereof.When use has the reagent of desulfurization and organic concentration homogenising dual-use function, be generally normal-temperature operation, the operation air speed is 100～15000h
-1When using special-purpose desulfurizing agent, the bed inlet temperature is normal temperature～400 ℃, and using the air speed scope is 500～30000h
-1Need according to the tolerance of organic exhaust gas and service conditions such as the kind of hydrogen sulfide content and organic sulfur and use amount that concentration is determined desulfurizing agent and temperature, air speed wherein.In general, when organic waste gas concentration of sulfur is higher, need under less air speed and higher temperature, use special-purpose desulfurizing agent.
When adopting Regenerative Combustion Technology, waste gas through the processing of organic concentration homogenizing, can directly enter the heat-accumulation combustion device and handle discharging, the heat-accumulation combustion device has two or more accumulation of heat beds usually, a shared combustion chamber, combustion chamber have auxiliary burner or electric heater to start or auxiliary thermal source as device.600～900 ℃ of chamber temperatures.Waste gas is handled back gas alternately by same accumulation of heat bed with burning, realizes heat exchange.It is by the autocontrol valve group that the waste gas switching enters two or more beds.The heat storage of bed filling is shapes such as sphere, square saddle type, cellular, column, and the heat storage material is pottery, aluminium oxide, cordierite etc.Other parameters of heat-accumulation combustion device can be determined by this area general knowledge.
When adopting the catalytic combustion treatment technology, through the waste gas of organic concentration homogenizing and desulfurization processing, import and export the gas heat exchanger heating through reactor successively, auxiliary heater, catalytic combustion reactor is imported and exported gas heat exchanger and is cooled off the back discharging.Catalytic combustion reactor and catalyst and operating condition can be determined by this area general knowledge.Adopt the honeycomb type noble metal catalyst as catalyst for catalytic combustion, carrier is a honeycomb ceramic body, supports precious metals pt, Pd and CeO on it
2The isoreactivity component.The inlet bed temperature scope of catalytic combustion reactor is generally 200～450 ℃, and using the air speed scope is 5000～100000h
-1Adjust the serviceability temperature and the air speed of catalyst according to contained organic kind and concentration in the organic exhaust gas, on the one hand to make organic exhaust gas that clean-up effect is preferably arranged, avoid organic exhaust gas heat release when catalyst bed reaction more and cause catalyst on the other hand again because of high temperature deactivation.
When adopting heat-storage catalytic burning treatment technology, energy storage bed number of plies amount, the control of gas transfer valve group etc. are identical with the heat-accumulation combustion device, but waste gas needs desulfurization to handle, and catalyst is seated in the middle of the heat storage bed, and the temperature of beds, air speed and the conventional catalyst treatment technology that burns is identical.
Step (3) is described will hang down VOC concentration foul waste gas and adopt in washing and the adsorption treatment, and washing operation is mainly removed materials such as hydrogen sulfide in the waste gas, ammonia, phenol, mercaptan.The above-mentioned waste gas washing process of the present invention adopts the sewage-farm supposition water purification (water that can directly discharge, as rainwater etc.), the discharge water after handling, also can adopt other cleaning solution, as pH value is alkaline detergent solution greater than 7, as the alkaline relief liquor in the various technologies; If the pollutant in the low VOC concentration foul waste gas mainly is a hydrogen sulfide, do not having to add adjusting PH with base under the situation of alkaline sewage; If the pollutant in the low VOC concentration foul waste gas mainly is an ammonia, under the situation that does not have slant acidity sewage, can adds sulfuric acid and transfer pH.Washing can be adopted this area usual manner, as spray mode, packed tower mode etc.; Washings enter the sewage-farm to be handled.The adsorbent and the operating condition of this area routine adopted in the absorption of washing back waste gas.Adsorbent can be various VOC to be had the porous mass of adsorption capacity, and as active carbon, desulphurized aetivated carbon, molecular sieve, diatomite etc., various adsorbents all can adopt commercially available mill run, also can be prepared according to prior art.The adsorbent desorption and regeneration adopts steam regeneration or the regeneration of catalytic combustion tail gas.The desorption and regeneration process adopts the operating condition of this area routine.Absorption and desorption and regeneration handover operation.The volume space velocity of adsorption operations is generally 1000～20000hr
-1, the volume space velocity of desorption and regeneration is generally 10～500hr
-1, the desorption and regeneration temperature is generally 100～250 ℃.When adopting the steam desorption and regeneration, temperature is generally 150～250 ℃, and regeneration gas immerses sewage-farm facilities such as sewage-farm regulating reservoir or oil interceptor and as far as possible directly is condensed into liquid by pipeline, and fixed gas and high VOC concentration waste gas merge to be handled; When adopting catalytic combustion tail gas desorption and regeneration, temperature is generally 100～200 ℃, and regeneration gas and high VOC concentration waste gas merge to be handled.
Compared with prior art, the present invention has following advantage:
1, foul waste gas comprehensive purifying that can enterprise is dissimilar is handled.Dissimilar waste gas adopts different technical process to handle in the prior art, and emission-control equipment is many, the cost height.The inventive method is classified the foul waste gas of enterprise's separate sources, at the characteristics of dissimilar waste gas, is attached in the cover waste gas purification technology, makes dissimilar foul waste gas all obtain effective purified treatment.Technological process is simple, and running cost is low.
2, low VOC concentration foul waste gas is used from the water inlet in sewage-farm or is gone out water washing, and running cost is low.Except that low concentration VOC (volatile hydrocarbon), also comprise a spot of sulfur-containing compound, ammonia, phenol pollutant etc. in the low VOC concentration foul waste gas.All there are certain deficiency in conventional absorption or microbial cleaning method, mainly are the component complexity, and absorption or microbial cleaning method are better to the clean-up effect of one-component waste gas, and be undesirable to the purified treatment result of complex component waste gas.The present invention is by furtheing investigate discovery to this type of waste gas, though sulfur-containing compound wherein, phenol, ammonia etc. come from the sewage, but mainly be owing to gas carry the effect enter in the waste gas, and it is very low through sulfide, ammonia and phenol concentration in the water outlet after the biochemical even depth processing, adopt this type of to purify waste water as the cleaning solution of waste gas, can be effectively with pollutant removings such as the sulfide in the waste gas, ammonia, phenol, and running cost is lower.Washing process can also remove particle wherein.The washing absorption liquid returns the sewage-farm and handles, and can not produce secondary pollution.
3, the waste gas after the washing carries out adsorption treatment, and tail gas can qualified discharge.Saturated adsorbent is regenerated with the combustion tail gas of heat, regeneration desorption gas enters high VOC exhaust treatment system and handles, because desorption gas accounts for the fraction of the total tolerance of high VOC waste gas, and high VOC exhaust treatment system has concentration homogenizing, desulfurization treatment system, therefore can not cause adverse effect, can guarantee the stable long-term operation of whole exhaust treatment system catalytic combustion, heat-accumulation combustion or heat-storage catalytic burning.As desorption and regeneration gas, can make full use of heat energy with catalytic combustion tail gas, reduce energy consumption, reduce running cost.
Description of drawings
Fig. 1 is a kind of specific embodiment typical process flow of the present invention schematic block diagram.
The specific embodiment
Further illustrate the present invention below in conjunction with example, but do not limit protection scope of the present invention.The pressure of operating process of the present invention need not limit, and is generally the pressure that waste gas flows through cleaning treatment system is smoothly got final product, and the purification process of limiting temperature is not the natural temperature of waste gas, general variation to some extent with the variation of operating condition and weather, but need not adjust.
Embodiment 1-12
With the gas sampling of certain petroleum chemical enterprise's sewage biochemical aeration tank and the generation of mud ageing pond, the sewage with enterprise's discharging in packed tower carries out carrying out washing treatment, gas-liquid contact time 2～5s, and washing intensity is 3～7L cleaning solution/M
3Waste gas.Waste gas after the washing adopts charcoal absorption, adsorption process adopts two absorber handover operations, when being higher than relevant limit value such as GB 162976-1996 " discharge standard of air pollutants ", GB14554-93 " odorant pollutant discharge standard ", local discharge standard when discharging gas malodor components concentration, switch (can determine as required during concrete operations).The adsorption process volume space velocity is 1500hr
-1Desorption and regeneration adopts 250 ℃ of steam regenerations, and air speed is 50hr
-1Or discharge tail gas with catalytic combustion and carry out desorption and regeneration, regeneration temperature is 140 ℃, air speed is 80hr
-1, the high VOC waste gas that regeneration gas and oil interceptor, floation tank etc. produce merges to be handled.Through washing, adsorption treatment, the low VOC exhaust-gas treatment effect of variable concentrations sees Table 1.
The composition and the clean-up effect of the low VOC concentration foul waste gas of table 1
This enterprise's sewage-farm regulating reservoir, oil interceptor, floation tank are sealed, and the organic exhaust gas that contains sulfide of discharging mixes with the desorption and regeneration gas of above-mentioned intermittence or continuous blow-down, and gaseous mixture has following 4 kinds of handling processes:
(1) concentration homogenizing/desulfurization-catalytic combustion.Introduce the concentration homogenizer, homogenizer can load the reagent with organic concentration homogenizing and two kinds of functions of desulfurization, and (concentration homogenizing and desulfurization also can be carried out in two devices respectively, the reagent that filling has the organic concentration homogenizing in the concentration homogenizer, filling has the reagent of desulfurizing function in the devulcanizer), after waste gas process organic concentration homogenising and desulfurization are handled, the monitoring organic concentration, if concentration is higher than 25% of LEL, enter heat exchanger again after the entrained air dilution, otherwise directly enter heat exchanger, high-temperature gas heat exchange with the reactor discharge, waste gas after the heat exchange enters heater, if waste gas has reached the reactor inlet temperature that needs, heater is not worked; Otherwise heater work is heated to the reactor inlet temperature that needs with EGT, enters catalytic combustion reactor and handles, and Purge gas is through heat exchange cooling back discharging.
(2) concentration homogenizing-heat-accumulation combustion.Introduce the concentration homogenizer, homogenizer filling active carbon, molecular sieve, aluminium oxide and composition thereof are behind the waste gas process organic concentration homogenising device, the monitoring organic concentration, if concentration is higher than 25% of LEL, the entrained air dilution, otherwise directly enter the heat-accumulation combustion device; Handle the Purge gas discharging through heat-accumulation combustion.
(3) concentration homogenizing/desulfurization-heat-storage catalytic burning.Introduce the concentration homogenizer, homogenizer can load the reagent (also can finish concentration homogenizing and desulfurizing function in two devices) with organic concentration homogenizing and two kinds of functions of desulfurization, after waste gas process organic concentration homogenising and desulfurization are handled, or directly enter the heat-storage catalytic combustion reaction device, or mix with an amount of air to guarantee that the organic concentration in the waste gas is controlled at below 25% of organic matter LEL, enters the heat-storage catalytic combustion reaction device again; Burning is handled through heat-storage catalytic, the Purge gas discharging.
(4) concentration homogenizing-desulfurization/catalytic combustion.Introduce the concentration homogenizer, homogenizer filling active carbon, molecular sieve, aluminium oxide and composition thereof, behind the waste gas process organic concentration homogenising device, or directly enter the import and export heat exchanger of catalytic combustion reactor, or mix with an amount of air to guarantee that the organic concentration in the waste gas is controlled at below 25% of organic matter LEL, entering heat exchanger again, the waste gas after the heat exchange enters heater, during desulfurizing agent needs if waste gas has reached a high temperature operating temperature, heater is not worked; Otherwise, heater work, exhaust gas concentration is heated to temperature required, (desulfurizing agent and catalyst for catalytic combustion are contained in the same reactor to enter desulfurizing agent bed pull-up sulphur, waste gas through the desulfurizing agent bed, enters the catalyst for catalytic combustion bed earlier then), afterwards, enter catalytic combustion reactor and handle, Purge gas is through heat exchange cooling back discharging.
Waste gas purification treatment conditions among each embodiment are listed in table 2, and the purified treatment effect under each condition is listed in table 3.Material volume loadings is 500L in the concentration homogenizer.Wherein, consisting of of S1 desulfurizing agent: 85wt%Fe
2O
3, 5wt%Al
2O
3, 5wt%NaOH, 5wt% talcum powder, through compression molding; Consisting of of S2 desulfurizing agent: 85wt%ZnO
3, 5wt%Al
2O
3, 5wt%NaOH, 5wt% methylcellulose, add extruded moulding after the suitable quantity of water.The C1 catalyst supports 0.3wt%Pt, 0.14wt%Pd and 2.1wt%CeO by dipping on the honeycomb ceramic carrier
2Make, the C2 catalyst supports 0.4wt%Pt and 2.5wt%CeO by dipping on the honeycomb ceramic carrier
2Make.Heat storage is a ceramic honeycomb.
Claims (11)
1, a kind of comprehensive purifying method of foul waste gas comprises following content:
(1) foul waste gas with oil refining enterprise carries out categorised collection: high VOC concentration foul waste gas, low VOC concentration foul waste gas;
(2) high VOC concentration foul waste gas purification process technique comprises concentration homogenizing and burning;
(3) low VOC concentration foul waste gas purification process technique comprises washing and absorption; Washings are from the sewage-farm, and the pollutant that washing absorbs comprises sulfide, ammonia or phenol, and the waste water after washing absorbs returns the sewage-farm and handles; The foul waste gas of regeneration desorption gas and high VOC concentration carries out purified treatment jointly in step (2);
Described high VOC concentration foul waste gas and low VOC concentration waste gas are by arbitrary numerical division in mean concentration 100～1500 μ L/L.
2, in accordance with the method for claim 1, it is characterized in that described high VOC concentration foul waste gas and low VOC concentration waste gas divide by mean concentration 1000 μ L/L.
3, in accordance with the method for claim 1, it is characterized in that described high VOC concentration foul waste gas source comprises regulating reservoir, oil interceptor, floation tank or volatile materials storage tank; Low VOC concentration foul waste gas source comprises sewage biochemical purification processing unit or Treatment of Sludge unit.
4, in accordance with the method for claim 1, it is characterized in that described burning comprises catalytic combustion, heat-accumulation combustion or heat-storage catalytic burning.
5, in accordance with the method for claim 1, it is characterized in that described concentration homogenizing carries out in the concentration homogenizer, the material that inner filling has the concentration homogenization, the material with concentration homogenization are one or more the combinations in active carbon, molecular sieve, silica gel, aluminium oxide, the diatomite.
6, in accordance with the method for claim 1, it is characterized in that described high VOC concentration foul waste gas adopts concentration homogenizing-desulfurization-catalytic combustion technology purified treatment.
7, in accordance with the method for claim 1, it is characterized in that described high VOC concentration foul waste gas adopts concentration homogenizing-heat-accumulation combustion technology purified treatment.
8, in accordance with the method for claim 1, it is characterized in that described high VOC concentration foul waste gas adopts concentration homogenizing-desulfurization-heat-storage catalytic burning process purified treatment.
9,, it is characterized in that described concentration homogenizing material has desulfurizing function simultaneously according to claim 5,6 or 8 described methods.
10, in accordance with the method for claim 1, it is characterized in that absorption and regeneration desorption handover operation in the described adsorption treatment process.
11, in accordance with the method for claim 10, it is characterized in that described desorption and regeneration adopts steam or catalytic combustion tail gas, the volume space velocity of desorption and regeneration is 10～500hr
-1, temperature is 100～250 ℃.
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2006
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