CN1009993B - Absorbent for greasy flue gas and its preparation method - Google Patents
Absorbent for greasy flue gas and its preparation methodInfo
- Publication number
- CN1009993B CN1009993B CN 88107010 CN88107010A CN1009993B CN 1009993 B CN1009993 B CN 1009993B CN 88107010 CN88107010 CN 88107010 CN 88107010 A CN88107010 A CN 88107010A CN 1009993 B CN1009993 B CN 1009993B
- Authority
- CN
- China
- Prior art keywords
- coke
- absorbent
- maceration extract
- greasy
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The present invention relates to an absorbent for oil fume and a preparing method thereof. The absorbent for oil fume can absorb oil fume with harmful gases, such as oil mist, smoke, NOx, SOx, etc., and the absorbent for oil fume is made of coke particles which are impregnated in the solution of alkali urea and alkali metal hydroxide. The preparing method is that coke particles with the particle diameter of 3mm to 5mm is impregnated in the solution of 3% to 8% of alkali urea and 5% to 20% of sodium hydroxide or the potassium hydroxide solution in a closed mode, and then, the coke particles are dried at the temperature of 105 DEG C to make the water content less than 0.1%.
Description
The invention belongs to the flue gas sorbing material, relate in particular to oil smoke aspiration enclosure material and preparation method thereof.
In some machining processes of industry such as metallurgy, petrochemical industry, machinery and food, when for example machining is made quenching liquid, cooling-lubricant with oil, contain the pernicious gases such as NOx, SOx of very strong mist of oil flue dust of a large amount of adhesions and low concentration in the oil smoke gas of generation.Still there are not effective scavenging material and purification method at present.In the prior art, having only NOx, SOx in the simple processing waste gas is the method and the adsorbent of purpose.For example US3926590 discloses the SOx that handles thermal power plant, chemical plant, smeltery and metal draining room freely to produce, the method for NOx, sorbent usedly active carbon contact processing under the 300-1300 ℃ of condition with ammonia and prepares; And the desulfurization denitration method of JP58-79522, the disclosed flue gas of JP58-79523, be intended to adsorb SOx, NOx in the flue gas of discharging from burners such as Industrial Boilers, sorbent used is the coke that destructive distillation coal under 1000 ℃ of high temperature is obtained, after 750 ℃ of high-temperature activations 5 hours, impregnated carbon acid salt solution again, oven dry is at last made.The major defect of these adsorbents is that preparation is complicated, cost higher (needing activation), and service condition harshness (350 ℃ of ability generation absorbing and reducing reactions), and can only adsorb pernicious gas merely.The sorbing material that mist of oil flue dust and above-mentioned pernicious gas while of mixing with it are administered yet there are no report.Therefore above-mentioned oil smoke gas so far can only be outdoor with its discharge with air exhauster, promptly pollutant from indoor transfer to outdoor.
The purpose of this invention is to provide a kind of oil smoke gas of effectively administering is adsorbent of the pernicious gases such as NOx, SOx that mix with the mist of oil flue dust of clean oil fog dust dirt and absorption simultaneously and preparation method thereof.
This adsorbent is that its granularity is 3～5 millimeters through alkaline urea and the impregnated coke granule of alkali hydroxide soln, and bulk density is 0.65～0.7 gcu.m., and specific area is about 3.4 meters squared per gram, and water content is less than 0.1%.
Its absorption property: the adsorption efficiency to NOx is 99%, is 70% to the SOx adsorption efficiency, is 99% to the adsorption efficiency of oil smoke dirt, and adsorption capacity is that 7%(100 gram adsorbent can adsorb 7 gram nuisances).Also adsorbable in addition various acid gas.
This preparation of adsorbent method is: the coke fragmentation is sieved, with the coke of 3～5 mm granules degree, make the maceration extract dipping with the mixed liquor of alkaline urea and alkali hydroxide soln, maceration extract did not have coke, dipping back oven dry makes its water content less than 0.1%, and it is stand-by to take out encapsulation.
The concentration of said alkaline urea is advisable with 3～8%, and the concentration of alkali hydroxide soln is advisable with 5～20%, for not making the escaping of ammonia, adds a cover sealing during dipping.Dip time is too short, floods bad; Long nonsensical and ammonia is decomposed, dip time is comparatively suitable about 2 hours.The coke that dipping is good can take out airing a period of time (as half an hour) and reenter baking oven and smoke, and baking temperature is advisable with 105 ℃, is lower than this temperature, and moisture content loses slowly, smokes time lengthening; Be higher than this temperature, ammonia is wanted dissipation.
Embodiment: the coke fragmentation with no tar is sieved, remove powder, the taking-up meso-position radius is that coke 2500 grams of 3～5 mm granules are put into 500 milliliters of sodium hydroxide solutions that contain 4% aqua ammonia and 10%, add a cover the sealing dipping after 2 hours, take out airing half an hour, put into baking oven again, smoke water content with 105 ℃ temperature and be less than 0.1%, the taking-up encapsulation is stand-by.
The usage of this adsorbent is to put into the adsorption layer of fixed adsorption bed, puts it in the fixed adsorption bed of smoke gas purification device of the applicant invention, can reach above-mentioned adsorption effect.
Adsorbent provided by the invention is owing to through chemical agent dipping, have the characteristic of physical absorption and chemisorbed concurrently, and not only absorption property is good, and absorption is stable, after pollutant is adsorbed, and fugacity not.In addition, owing to make the main body material with coke, with low cost, easily manufactured, for the oil smoke gas that contains mist of oil, flue dust and pernicious gas that is difficult to purify provides comparatively desirable sorbing material, favorable economic benefit and environmental protection benefit are arranged.
Claims (6)
1, a kind of absorbent for greasy flue gas, it is with the impregnated coke of maceration extract, be specially adapted to clean oil fog dust dirt and absorption and produced simultaneously NOx of mist of oil flue dust and SOx, it is characterized in that said maceration extract is alkaline urea and alkali hydroxide soln, the granularity of coke is 3-5mm, and specific area is 3.4m
2/ g, maceration extract (containing alkaline urea 3-8%, alkali metal hydroxide 5-20%) is 1 with the volume ratio of coke: 7-8.
2, adsorbent according to claim 1 is characterized in that the bulk density of said coke granule is 0.65～0.7 gcu.m., and water content is less than 0.1%.
3, the preparation method of the said absorbent for greasy flue gas of a kind of claim 1, it is characterized in that coke with 3～5 millimeters particle diameters, be that the alkaline urea of 3-8% and mixed liquor that concentration is the alkali hydroxide soln of 5-20% are made maceration extract with concentration, under sealing condition, flood, oven dry makes its water content less than 0.1% afterwards.
4, according to the said method of claim 3, it is characterized in that said alkaline urea is ammonium hydroxide, alkali metal hydroxide is a NaOH.
5,, it is characterized in that said dip time is 2 hours according to the said method of claim 3.
6,, it is characterized in that said bake out temperature is 105 ℃ according to the said method of claim 3～5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107010 CN1009993B (en) | 1988-10-22 | 1988-10-22 | Absorbent for greasy flue gas and its preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107010 CN1009993B (en) | 1988-10-22 | 1988-10-22 | Absorbent for greasy flue gas and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031804A CN1031804A (en) | 1989-03-22 |
| CN1009993B true CN1009993B (en) | 1990-10-17 |
Family
ID=4834475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88107010 Expired CN1009993B (en) | 1988-10-22 | 1988-10-22 | Absorbent for greasy flue gas and its preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009993B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125845C (en) * | 2000-04-17 | 2003-10-29 | 武汉大学 | Solvent composition and its use |
| CN101816919B (en) * | 2010-04-16 | 2013-01-23 | 武汉钢铁(集团)公司 | Method for improving coke adsorption |
| CN107486001A (en) * | 2017-10-22 | 2017-12-19 | 赣州市经济技术开发区旺利机械加工厂 | A kind of serious pollution gas cleaning plant |
-
1988
- 1988-10-22 CN CN 88107010 patent/CN1009993B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031804A (en) | 1989-03-22 |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |