CN101502738B - Method and device for purifying light-concentration siloxane gas - Google Patents
Method and device for purifying light-concentration siloxane gas Download PDFInfo
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- CN101502738B CN101502738B CN2009100255122A CN200910025512A CN101502738B CN 101502738 B CN101502738 B CN 101502738B CN 2009100255122 A CN2009100255122 A CN 2009100255122A CN 200910025512 A CN200910025512 A CN 200910025512A CN 101502738 B CN101502738 B CN 101502738B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention provides a purifying method for low concentration siloxane gas and a device thereof, the method comprises the following steps: firstly, pressurizing landfill gas, marsh gas or digestion gas containing a type of siloxane needing to be purified to -0.1-1MPa and controlling the gas temperature between -20 DEG C and 60 DEG C; secondly, sending the gas to be purified in accordance with the conditions into a primary absorption tank of the two level absorption tanks which are filled with coal active carbon sorbent and active carbon and are connected in series, so as to remove the siloxane gas with low silicon atomic number; thirdly, leading the gas, from which siloxane gas with low silicon atomic number is removed by the primary absorption tank into a secondary absorption tank to remove siloxane gas with high silicon atomic number to obtain qualified purified gas to be output for subsequent process use. The device of the invention consists of two serially connected absorption tanks which are internally provided with coal active carbon sorbent. The invention has the advantages of high efficiency, simple structure and low operation cost.
Description
Technical field
The present invention relates to a kind of gas purification processing method, especially a kind of purifying treatment method, specifically a kind of purification method of light-concentration siloxane gas and device to the light-concentration siloxane that contained in the biomass gas.
Background technology
Contain a class siloxane gas in biogas and rubbish landfill gas, in this class gas, the silicon atom content in its molecular formula is from 1 silicon atom to 6 silicon atom, and molecular structure has ring-type and linear chain structure.This class gas is mainly derived from cosmetics and the skin moisten product enter refuse landfill or sewage treatment plant by rubbish or sewage, so by organic degraded form gaseous material in the lump with rubbish landfill gas or biogas and mix and rubbish landfill gas or biogas in.When rubbish landfill gas or biogas are utilized by the centralized collection burning, this class siloxane gas forms hard silica fouling attached in the combustion chamber of engine or on the heat-exchanging tube bundle wall of boiler by high-temp combustion, not only reduced heat exchange efficiency, also can cause wearing and tearing and collsion damage moving component.Because the concentration of siloxane gas is very low, the cost that adopts cryogenic condensation to remove is very big, therefore is necessary to seek a kind of good and cheap, convenient processing method efficiently and installs the siloxane gas composition of removing wherein, to guarantee the completeness of subsequent technique burning.
Summary of the invention
The objective of the invention is to cause the problem that produces harmful substance when burning because of containing a large amount of siloxane gas, invent a kind of processing method and device simple, easily row at prior biological matter class gas.
One of technical scheme of the present invention is:
A kind of purification method of light-concentration siloxane gas is characterized in that:
At first, the rubbish landfill gas that contains a class siloxanes, biogas or digestion gas that needs are purified are pressurized to-0.1～1MPa, and the control gas temperature is between-20～60 ℃;
Secondly, qualified gas to be clean is sent in the first order adsorption tanks in the two-stage adsorption tanks that are filled with the coal mass active carbon adsorbent of series connection, to remove the siloxane gas of low silicon atom number;
The 3rd, the siloxane gas that has removed low silicon atom number through first order adsorption tanks is entered in the adsorption tanks of the second level, to remove the siloxane gas of high silicon atom number, obtain qualified Purge gas output and use for subsequent technique.
The particle diameter of the coal mass active carbon adsorbent in described first and second grades of adsorption tanks is 1mm～5mm, the aperture of the coal mass active carbon adsorbent in the first order adsorption tanks is 1nm～10nm, and the aperture of the coal mass active carbon adsorbent in the adsorption tanks of the second level is 20nm～50nm.
The saturated back of the described first order and second level adsorption tanks adopts the steam method of reproduction that coal mass active carbon adsorbent is wherein handled to improve adsorption capacity, the regeneration vapor (steam) temperature is between 120 ℃ to 250 ℃, the reverse purging of regeneration steam, the flow direction of the steam of promptly regenerating is opposite with processed gas flow direction.
The saturated back of the described first order and second level adsorption tanks adopts modification processing method that the coal mass active carbon adsorbent of filling in the adsorption tanks is handled to improve its activity, method of modifying is to flood with the nitric acid of 0.1N-0.5N concentration, hydrochloric acid, boric acid, oxalic acid or its combination liquid, in 180 ℃ of-250 ℃ of temperature ranges, carry out heat treated, spend deionised water heat time heating time after the oven dry between 8h-16h.
Two of technical scheme of the present invention is:
A kind of purifier of light-concentration siloxane gas, it is characterized in that it is made up of the first order adsorption tanks and the second level adsorption tanks of mutual serial connection, all be filled with the coal mass active carbon adsorbent in first order adsorption tanks and the second level adsorption tanks, link to each other by tube connector between first order adsorption tanks and the second level adsorption tanks, on this tube connector, valve is installed, first order adsorption tanks and second level adsorption tanks all are connected with corresponding draining valve, first order adsorption tanks link to each other with the escape pipe of unstripped gas by air inlet pipe, on its described air inlet pipe air intake valve is installed, on the air inlet pipe between valve and the first order adsorption tanks, also be connected with the regeneration steam exhaust pipe, regeneration steam exhaust-gas valve is installed on this regeneration steam exhaust pipe; Described second level adsorption tanks link to each other with follow-up gas equipment by escape pipe, on described escape pipe, the valve of giving vent to anger is installed, on the escape pipe of giving vent to anger between valve and the second level adsorption tanks, be connected with the regeneration steam inlet duct, regeneration steam inlet valve gas is installed on the regeneration steam inlet duct.
Beneficial effect of the present invention:
The present invention adopts modified activated carbon as the adsorption cleaning processing medium, and it is low to have a cost, and recycling rate of waterused height, and the pore-size distribution by the control active carbon and carry out modification can obtain siloxanes clean-up effect preferably.
The present invention is applied widely, can be widely used in purifying the silicone components in the biomass gas such as rubbish landfill gas, biogas, digestion gas.
Device of the present invention is simple, and manufacturing, installation, using method can realize energy recycling.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1.
A kind of purification method of light-concentration siloxane gas, it may further comprise the steps:
At first, the rubbish landfill gas that contains a class siloxanes, biogas or digestion gas adjustment (as pressurization) that needs purify are arrived-0.1MPa～1MPa, and the control gas temperature is between-20 ℃～60 ℃;
Secondly, qualified gas to be clean is sent in the first order adsorption tanks in the two-stage adsorption tanks that are filled with the coal mass active carbon adsorbent of series connection, to remove the siloxane gas of low silicon atom number;
The 3rd, the siloxane gas that has removed low silicon atom number through first order adsorption tanks is entered in the adsorption tanks of the second level, to remove the siloxane gas of high silicon atom number, obtain qualified Purge gas output and use for subsequent technique.
The particle diameter of the coal mass active carbon adsorbent in described first and second grades of adsorption tanks is 1mm～5mm, the aperture of the coal mass active carbon adsorbent in the first order adsorption tanks is 1nm～10nm, and the aperture of the coal mass active carbon adsorbent in the adsorption tanks of the second level is 20nm～50nm.
In order to improve the utilization rate of adsorbent and activated carbon, the saturated back of adsorbent in adsorption tanks and activated carbon (can be by judging the content of siloxanes in the adsorption tanks gas outlet, the second level, when the content of siloxane of discharging greater than setting value promptly: think saturated during 0.5mg/Nm3, need regenerate and the modification processing), adopt the steam method of reproduction that coal mass active carbon adsorbent is wherein handled to improve adsorption capacity to the first order and second level adsorption tanks immediately, the regeneration vapor (steam) temperature is between 120 ℃ to 250 ℃, the reverse purging of regeneration steam, the flow direction of the steam of promptly regenerating is opposite with processed gas flow direction.Adopt modification processing method that the coal mass active carbon adsorbent of filling in the adsorption tanks is handled to improve its activity simultaneously, method of modifying is to flood with the nitric acid of 0.1N-0.5N concentration, hydrochloric acid, boric acid, oxalic acid or its combination liquid, in 180 ℃ of-250 ℃ of temperature ranges, carry out heat treated, spend deionised water heat time heating time after the oven dry between 8h-16h.
Fig. 1 is a purifier schematic diagram of the present invention.
A kind of purifier of light-concentration siloxane gas, it is made up of the first order adsorption tanks 1 and the second level adsorption tanks 2 of mutual serial connection, be filled with the coal mass active carbon adsorbent in first order adsorption tanks 1 and the second level adsorption tanks 2, the particle diameter of coal mass active carbon adsorbent is 1mm～5mm, the aperture of the coal mass active carbon adsorbent in the first order adsorption tanks is 1nm～10nm, the aperture of the coal mass active carbon adsorbent in the adsorption tanks of the second level is 20nm～50nm, link to each other by tube connector 3 between first order adsorption tanks 1 and the second level adsorption tanks 2, on this tube connector 3, valve 4 is installed, first order adsorption tanks 1 and second level adsorption tanks 2 all are connected with corresponding draining valve 5, first order adsorption tanks 1 link to each other with the escape pipe of unstripped gas by air inlet pipe 6, on the described air inlet pipe 6 air intake valve 7 is installed, on the air inlet pipe between air intake valve 7 and the first order adsorption tanks 1, also be connected with regeneration steam exhaust pipe 8, regeneration steam exhaust-gas valve 9 is installed on this regeneration steam exhaust pipe 8; Described second level adsorption tanks 2 link to each other with follow-up gas equipment by escape pipe 10, on described escape pipe 10, the valve 11 of giving vent to anger is installed, on the escape pipe 10 of giving vent to anger between valve 11 and the second level adsorption tanks 1, be connected with regeneration steam inlet duct 12, regeneration steam inlet valve gas 13 is installed on regeneration steam inlet duct 12.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (3)
1. the purification method of a light-concentration siloxane gas is characterized in that:
At first, the rubbish landfill gas that contains a class siloxanes, biogas or digestion gas that needs are purified are pressurized to-0.1～1MPa, and the control gas temperature is between-20～60 ℃;
Secondly, qualified gas to be clean is sent into being filled with in the first order adsorption tanks in the coal mass active carbon adsorbent two-stage adsorption tanks, of series connection to remove the siloxane gas of low silicon atom number;
The 3rd, the siloxane gas that has removed low silicon atom number through first order adsorption tanks is entered in the adsorption tanks of the second level, to remove the siloxane gas of high silicon atom number, obtain qualified Purge gas output and use for subsequent technique;
The particle diameter of the coal mass active carbon adsorbent in described first and second grades of adsorption tanks is 1mm～5mm, the aperture of the coal mass active carbon adsorbent in the first order adsorption tanks is 1nm～10nm, and the aperture of the coal mass active carbon adsorbent in the adsorption tanks of the second level is 20nm～50nm.
2. the purification method of light-concentration siloxane gas according to claim 1, it is characterized in that the described first order and second level adsorption tanks adopt the steam method of reproduction that coal mass active carbon adsorbent is wherein handled to improve adsorption capacity after saturated, the regeneration vapor (steam) temperature is between 120 ℃ to 250 ℃, the reverse purging of regeneration steam, the flow direction of the steam of promptly regenerating is opposite with processed gas flow direction.
3. the purification method of light-concentration siloxane gas according to claim 1, it is characterized in that the described first order and second level adsorption tanks adopt modification processing method that the coal mass active carbon adsorbent of filling in the adsorption tanks is handled to improve its activity after saturated, method of modifying is to flood with the nitric acid of 0.1N-0.5N concentration, hydrochloric acid, boric acid, oxalic acid or its combination liquid, in 180 ℃ of-250 ℃ of temperature ranges, carry out heat treated, spend deionised water heat time heating time after the oven dry between 8h-16h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100255122A CN101502738B (en) | 2009-02-06 | 2009-02-06 | Method and device for purifying light-concentration siloxane gas |
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| CN2009100255122A CN101502738B (en) | 2009-02-06 | 2009-02-06 | Method and device for purifying light-concentration siloxane gas |
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| CN101502738A CN101502738A (en) | 2009-08-12 |
| CN101502738B true CN101502738B (en) | 2011-05-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102463021B (en) * | 2010-11-05 | 2015-05-20 | 承源環境科技企業有限公司 | Energy saving device and energy saving method of solvent purifying system of fluidized floatation bed |
| ES2910994T3 (en) * | 2012-05-07 | 2022-05-17 | Donaldson Co Inc | Materials, methods, and devices for the removal of siloxane contaminants |
| CN103725338A (en) * | 2012-10-16 | 2014-04-16 | 北京时代桃源环境科技有限公司 | Device and method for removing oxosilane gas in combustible gas |
| CN107527666B (en) * | 2016-06-20 | 2019-07-12 | 江苏核电有限公司 | A kind of quantization control method of one loop of nuclear power station purification system boric acid saturation |
| CN108579324B (en) * | 2018-07-11 | 2023-05-09 | 遵义师范学院 | Br in recovered bromine-containing flue gas 2 Apparatus and method of (a) |
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