CN104524945B - Treating method for waste gas during ginkgol biloba extract production - Google Patents
Treating method for waste gas during ginkgol biloba extract production Download PDFInfo
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- CN104524945B CN104524945B CN201410849128.5A CN201410849128A CN104524945B CN 104524945 B CN104524945 B CN 104524945B CN 201410849128 A CN201410849128 A CN 201410849128A CN 104524945 B CN104524945 B CN 104524945B
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- waste gas
- xanthan gum
- alkali liquor
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Abstract
The invention discloses a treating method for waste gas during ginnkgol biloba extract production. The treating method comprises the step 1 that low-temperature cooling is performed, wherein the waste gas produced during production is centralized and fed into a low-temperature condenser for low-temperature cooling, the cooling temperature is 0-4 DEG C, initial separation of essential oil in the waste gas is achieved, and the essential oil enters a low-temperature storage tank; the step 2 that a spray tower absorbs the waste gas, wherein the waste gas coming from the step 1 enters the spray tower for treatment; the spray tower is a tandem four-stage tower, liquid phase materials in the four-stage spray tower are low-concentration alkali liquor containing xanthan gum, high-concentration alkali liquor containing xanthan gum, high-concentration alkali liquor containing xanthan gum and water respectively; the step 3 that high-attitude discharge is performed, wherein the final treated gas is conveyed to a chimney in a factory through a pipeline to be discharged at a high altitude.
Description
Technical field
The present invention relates to technical field of waste gas treatment, the process side of waste gas in more particularly to a kind of Semen Ginkgo extrac production
Method.
Background technology
Exhaust-gas treatment, also referred to as waste gas purification (flue gas purification) are primarily referred to as producing for industrial site
The raw industrial waste gas work that such as dust granules thing, flue gas flue dust, gas with foreign flavor, toxic and harmful are administered.Common
Waste gas purification have factory's fume and exhaust gas purifying, workshop dust waste gas purification, organic waste-gas purification, waste gas abnormal flavour purify, soda acid
Waste gas purification, purification of chemical waste gas etc..
Exhaust-gas treatment, mainly includes following methods:
1) dilute diffusion method: principle: frowziness ground gas is drained into air by chimney, or uses odorless Dilution air, fall
Low odorant concentration is to reduce stink.The scope of application: be applied to process, the foul gass discharging in a organized way of low concentration.
Advantage: expense is low, equipment is simple.Shortcoming: easily limited by meteorological condition, odorant still exists.
2) water absorption method: principle: using the characteristic that Cucumber in foul smell is soluble in water, make foul smell composition directly connect with water
Touch, thus being dissolved in water to reach deodorize purpose.The scope of application: the foul gass of water solublity, in a organized way emission source.Advantage: technique
Simply, convenient management, equipment operation expense low yield gives birth to secondary pollution, and cleaning mixture need to be processed.Shortcoming: purification efficiency is low,
Should be used in combination with other technologies, to mercaptan, the poor processing effect such as fatty acid.
3) aeration type activated sludge deodorization method: principle: odorant is distributed to mixed containing activated sludge with aeration form
In liquid, applied widely by the microbial degradation odorant of suspension growth.The scope of application: Japan has been used for night soil-treatment
Field, the Odor control of sewage treatment plant.Advantage: activated sludge through domestication after, to the odor pollutant less than limit load amount,
Clearance is up to more than 99.5%.Shortcoming: limited by aeration intensity, the application of this method also has certain limitation.
4) multimedium catalytic oxidation technique: principle: compound be situated between inside the special solid fillers of filling, filler in reaction tower more
Matter catalyst.When foul gass in the presence of air-introduced machine pass through packing layer, with by special nozzle be in dissipate vaporific ejection
Liquid phase compound oxidant is fully contacted on solid phase filler surface, and under the catalytic action of multimedium catalyst, in foul gass
Pollution factor be adequately broken.
The extraction of Semen Ginkgo, main production process includes extracting (alcohol extraction, concentration, organic solvent reclaim), refined (extraction
Separate, concentrate, vacuum drying), essence dry (vacuum drying, be spray-dried), typically adopt ethanol as Extraction medium, waste gas is main
Produce in operations such as raw material extraction, spraying drying, medicinal residues drying.The waste gas of typically now plant extract is through simple water
Absorb or directly discharge, serious pollution can be produced.
Content of the invention
Present invention aims to the deficiencies in the prior art, the process of waste gas in providing a kind of Semen Ginkgo extrac to produce
Method, can effectively purify the waste gas producing in Semen Ginkgo extraction process, and effect is obvious.
The present invention is achieved through the following technical solutions, and specifically includes following steps:
1) sub-cooled: send into low-temperature condenser after in the exhaust gas centralized producing in production and carry out sub-cooled, chilling temperature
For 0-4 DEG C, realize the initial gross separation of quintessence oil in waste gas, quintessence oil enters low-temperature storage tank；
2) spray column absorbs: step 1) waste gas out enters spray column and processes；
3) high altitude discharge: process the gas completing and pass through pipeline to factory's inner chimney high altitude discharge.
Described spray column is the level Four of series connection, and the liquid phase substance in level Four spray column respectively with the addition of the dense of xanthan gum
Spend relatively low alkali liquor, with the addition of the higher alkali liquor of the concentration of xanthan gum, the higher alkali liquor of concentration that with the addition of xanthan gum and water, its
In, the relatively low alkali liquor of concentration that the first order with the addition of xanthan gum is waste gas absorption primary response tower, two grades, three-level protective, level Four water
It is to couple to process with subsequent technique, and reduces alkali concn, be easy to pipeline maintenance and repair.
Described xanthan gum addition preferred 0.3-0.8% mass concentration.
Described alkali liquor preferred naoh, nahco3、na2co3, described concentration is with reference to prior art.
The present invention with the addition of xanthan gum in the liquid phase substance of spray column, is at present in the world mainly in view of xanthan gum
Integrate thickening, suspension, emulsifying, be stable at, best performance biogum more, acetone is contained in the molecular side chain end of xanthan gum
The number of acid groups, has a significant impact to its performance, xanthan gum has the general performance of long chain macromolecule, but it is than general high score
Son is containing more functional group.Xanthan gum has good suspension effect to insoluble solid and oil droplet.Xanthan gum colloidal sol molecule
The spiral copolymer of superjunction crossed belt shape can be formed, constitute the network structure of fragile similar glue, it is possible to support solid particle,
Drop and the form of bubble, show very strong stable emulsifying effect and uphang i.Xanthan gum can quickly dissolve in water,
There is good water solublity.Especially also can dissolve in cold water, numerous and diverse course of processing can be saved, easy to use.Xanthan gum is water-soluble
Liquid has high viscosity under static or low shear action.The viscosity of xanthan gum solution will not variation with temperature and occur very big
Change, general polysaccharide can occur viscosity B coefficent because of heating, but the aqueous solution of xanthan gum viscosity between 10-80 DEG C does not almost have
Change, even if the aqueous solution of low concentration still shows stable high viscosity within the scope of wide temperature.Xanthan gum solution
Sufficiently stable to soda acid, make its viscosity unaffected between ph is for 5-10, ph be less than 4 and more than 11 when viscosity have slight
Change.Xanthan gum solution can be miscible with many saline solution (potassium salt, sodium salt, calcium salt, magnesium salt etc.), and viscosity is unaffected.Higher
Under salt concentration conditions, or even its dissolubility is still kept not occur to precipitate and flocculate in saturated salt solution, its viscosity is hardly
Impacted.
Compared with prior art, the invention has the advantages that
1st, in the extraction process of Semen Ginkgo, waste gas is primarily generated at the operations such as raw material extracts, spraying is dried, medicinal residues are dried.Carry
Take operation typically to adopt water extraction or alcohol extraction, during water extraction, vapor can be produced, and the flower of Semen Ginkgo, stem, Ye Zhong, containing a large amount of
Plants essential oil, Semen Ginkgo soaks in hot water or water vapour, and the quintessence oil discharging volatilizees upwards with water vapour, if directly arranged
Put, strong abnormal smells from the patient can be produced, the present invention is by waste gas sub-cooled, the water vapour carrying quintessence oil is solidifying in low-temperature condenser
Knot, then be converted to liquid from gaseous state, quintessence oil proportion is lighter than water and water insoluble, can float side on the water and be removed, lower section contains
Micro quintessence oil, and the liquid of all water solublity volatile substances, referred to as hydrosol, quintessence oil can increase Semen Ginkgo and produce after separating with hydrosol
The added value of product.
2nd, other operations extracted in Semen Ginkgo, the pollution factor in waste gas is mainly NMHC, ss, so2、noxDeng,
Inorganization volatilization waste gas is mainly ethanol volatile matter of extraction or extraction process generation etc., and these pollution factors are by adding
The alkali liquor spray column of xanthan gum, compares and directly uses alkali liquor, xanthan gum can form network structure in alkali liquor, and pollution factor is more
Easily absorbed.
Specific embodiment
With embodiment, the invention will be further described below, but the invention is not limited in these embodiments.
Embodiment 1:
A kind of Semen Ginkgo extrac produce in waste gas processing method, specifically include following steps:
1) sub-cooled: send into low-temperature condenser after in the exhaust gas centralized producing in production and carry out sub-cooled, chilling temperature
For 0-4 DEG C, realize the initial gross separation of quintessence oil in waste gas, quintessence oil enters low-temperature storage tank；
2) spray column absorbs: step 1) waste gas out enters spray column and processes；
Described spray column is the level Four of series connection, and the liquid phase substance in level Four spray column respectively with the addition of the dense of xanthan gum
Spend relatively low alkali liquor, with the addition of the higher alkali liquor of the concentration of xanthan gum, the higher alkali liquor of concentration that with the addition of xanthan gum and water；Institute
The xanthan gum addition stated is 0.8% mass concentration；
3) high altitude discharge: process the gas completing and pass through pipeline to factory's inner chimney high altitude discharge.
Embodiment 2:
A kind of Semen Ginkgo extrac produce in waste gas processing method, specifically include following steps:
1) sub-cooled: send into low-temperature condenser after in the exhaust gas centralized producing in production and carry out sub-cooled, chilling temperature
For 0-4 DEG C, realize the initial gross separation of quintessence oil in waste gas, quintessence oil enters low-temperature storage tank；
2) spray column absorbs: step 1) waste gas out enters spray column and processes；
Described spray column is the level Four of series connection, and the liquid phase substance in level Four spray column respectively with the addition of the dense of xanthan gum
Spend relatively low alkali liquor, with the addition of the higher alkali liquor of the concentration of xanthan gum, the higher alkali liquor of concentration that with the addition of xanthan gum and water；Institute
The xanthan gum addition stated is 0.3% mass concentration；
3) high altitude discharge: process the gas completing and pass through pipeline to factory's inner chimney high altitude discharge.
Result:
Claims (1)
1. during a kind of Semen Ginkgo extrac produces, the processing method of waste gas is it is characterised in that specifically include following steps:
1) sub-cooled: send into low-temperature condenser after in the exhaust gas centralized producing in production and carry out sub-cooled, chilling temperature is 0-4
DEG C, realize the initial gross separation of quintessence oil in waste gas, quintessence oil enters low-temperature storage tank；
2) spray column absorbs: step 1) waste gas out enters spray column and processes；
3) high altitude discharge: process the gas completing and pass through pipeline to factory's inner chimney high altitude discharge；
Described spray column is the level Four of series connection, and the liquid phase substance in level Four spray column respectively with the addition of the concentration of xanthan gum relatively
Low alkali liquor, with the addition of the higher alkali liquor of the concentration of xanthan gum, the higher alkali liquor of concentration that with the addition of xanthan gum and water, wherein,
The relatively low alkali liquor of concentration that the first order with the addition of xanthan gum is waste gas absorption primary response tower, two grades, three-level protective, level Four water be for
Process with subsequent technique and couple, and reduce alkali concn；
Described xanthan gum addition is 0.3-0.8% mass concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410849128.5A CN104524945B (en) | 2014-12-31 | 2014-12-31 | Treating method for waste gas during ginkgol biloba extract production |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201410849128.5A CN104524945B (en) | 2014-12-31 | 2014-12-31 | Treating method for waste gas during ginkgol biloba extract production |
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| CN104524945A CN104524945A (en) | 2015-04-22 |
| CN104524945B true CN104524945B (en) | 2017-01-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1168410A (en) * | 1996-06-14 | 1997-12-24 | 周文俊 | Technological process of extracting oil from fennel and calamus |
| US9005336B2 (en) * | 2009-02-26 | 2015-04-14 | S.T. Corporation | Monoterpene component-rich essential oil, method for producing same and method for remediating environmental pollutants using the essential oil |
| CN202315673U (en) * | 2011-09-15 | 2012-07-11 | 常州天兴环保科技有限公司 | Equipment for treating waste gas containing nitric oxide |
| CN202224050U (en) * | 2011-09-15 | 2012-05-23 | 常州天兴环保科技有限公司 | Complete equipment for tail gas treatment of graphitization furnace |
| CN102380278B (en) * | 2011-09-22 | 2014-04-16 | 东南大学 | Method for cooperatively promoting agglomeration growth of PM (particulate matter) 2.5 and treating desulfuration wastewater in evaporation manner and device of method |
| CN203737036U (en) * | 2014-02-20 | 2014-07-30 | 江苏瑞帆环保装备股份有限公司 | Device for cooperatively reinforcing PM2.5 removing and deep utilization of flue gas residual heat |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Huang Fuping Inventor before: Huang Fuping Inventor before: Mo Xiankun Inventor before: Mo Chunyan Inventor before: Mo Haiyan |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170714 Address after: 530022 Nanning Road, the Guangxi Zhuang Autonomous Region Qingxiu District Education No. 5 Co-patentee after: Waste Gas Treatment Guilin Gentral Bank Equipment Co.,Ltd. Patentee after: Scientific Research Academy of Guangxi Environmental Protection Address before: 541004, Guilin, Qixing Road, Qixing District, Guilin, the Guangxi Zhuang Autonomous Region, China National hi tech Zone, University Science Park, room 410 Patentee before: Waste Gas Treatment Guilin Gentral Bank Equipment Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170125 Termination date: 20181231 |