CN106378085A - Spray tower filler for absorbing waste gas in olive leaf extract production - Google Patents

Spray tower filler for absorbing waste gas in olive leaf extract production Download PDF

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Publication number
CN106378085A
CN106378085A CN201611080906.4A CN201611080906A CN106378085A CN 106378085 A CN106378085 A CN 106378085A CN 201611080906 A CN201611080906 A CN 201611080906A CN 106378085 A CN106378085 A CN 106378085A
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Prior art keywords
waste gas
spray tower
olive leaf
absorbing
litchi rind
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CN201611080906.4A
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Inventor
莫显坤
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Waste Gas Treatment Guilin Gentral Bank Equipment Co ltd
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Waste Gas Treatment Guilin Gentral Bank Equipment Co ltd
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    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
    • 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
    • B01D53/14—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 absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/302—Basic shape of the elements
    • B01J2219/30207—Sphere
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/30—Details relating to random packing elements
    • B01J2219/304—Composition or microstructure of the elements
    • B01J2219/30483—Fibrous materials

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

The invention discloses a spray tower filler for absorbing waste gas in olive leaf extract production. The filler can effectively absorb abundant stink waste gas in the olive leaf extract production process. Compared with the prior art, the filler performs absorption in the 3-4-stage xanthan-gum-added alkali liquor spray tower, and thus, has obvious effects; and in addition, the absorption is performed in the 1-2-grade filled-added spray tower, thereby shortening the procedure time consumption and saving the cost.

Description

A kind of Olive leaf P.E is used for absorbing the spray tower packing of waste gas in producing
Technical field
The invention belongs to packing technique field is and in particular to a kind of Olive leaf P.E is used for absorbing the spray of waste gas in producing Drench tower packing.
Background technology
Fructus oleae europaeae (Olea europaea L.), also known as olive, Europe Fructus Canarii albi, olive, is Oleaceae (Oleaceae) Olea (Olea L) plant.Fructus oleae europaeae is the conventional medicament of Mediterranean Region, is used for treating multiple with leaf and fruit medicine Disease.The decoct of Folium olive or preserved material have certain curative effect in mediterranean country frequently as the medication among the people of diabetes.Fructus oleae europaeae Leaf extract is used as dietary supplement to strengthen immunologic function in America and Europe.Modern data shows that Fructus oleae europaeae has anti-heart rate Uneven, antifungal, anti-hypercholesterolemia, blood sugar lowering, blood pressure lowering, antiinflammatory, antioxidation, antiviral, diuresis, spasmolytic and vasodilation etc. The multiple pharmacologically active of central nervous system, for treating diabetes, hypertension, diarrhoea, edema, the intestines and stomach angor, lump rash, respiratory tract The diseases such as infection, constipation, urinary tract infection.Separate the chemical composition obtaining can be divided into from leaf of Fructus oleae europaeae：Flavonoid, driffractive ring alkene ether Terpenoid, saccharide, organic acid and other compound.Olive leaf extract have reduction blood glucose, reduction blood fat, bacteriostatic activity, Antioxidant activity, anti-inflammatory activity strengthen many middle functions such as immunity and beauty treatment, and potentiality to be exploited is huge.Modern biotechnology analytical table Bright, in leaf of Fructus oleae europaeae, active substance mainly has olive polyphenol, flavonoid, secoiridoid (inclusion cleupin) etc., and Its antioxidation biology active matter content is higher than olea europaea fruit and stem.
The plant cell of Folium olive is contained within oils and fatss, mainly by composition for triglyceride the mixture that forms of compound, These oils and fatss are with elaioleucite and oil body protoplast form, in discontinuous graininess, irregularly disperse together with granule protein body In the cell etc. existence form exists.Existing extracting method, is all directly the raw materials such as Folium olive to be smashed or passes through after pulverizing The mode extracting directly such as water extraction/alcohol extraction or microwave extraction, when extracting, the oils and fatss in cell can concurrently separate out, oil Fat in process of production, can ferment, decompose, and produces substantial amounts of gas, contain in these gases fragrant hydrocarbon system, styrene, hydro carbons, The materials such as phenols, also with stench, if unprocessed just directly discharge, can cause workshop and neighboring area environment extremely to dislike Bad.In prior art, Chinese patent CN104524946A, in a kind of Radix Paeoniae Alba extract production, the processing method of waste gas, adopts 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, real The initial gross separation of quintessence oil in existing waste gas, quintessence oil enters low-temperature storage tank；2) spray column absorbs：Step 1) waste gas out enters spray Tower is processed；Spray column is the level Four of series connection, and the concentration that the liquid phase substance in level Four spray column respectively with the addition of xanthan gum is 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；3) high idle discharge Put：Process the gas completing and pass through pipeline to factory's inner chimney high altitude discharge.Such processing method, for Radix Paeoniae Alba extract The process of waste gas in production, effect is preferable, but the process for foul waste gas in Olive leaf P.E production, then effect difference is strong How people's will, therefore, process the Olive leaf P.E containing a large amount of stenches and produce waste gas, be a technical barrier.
Fibrous nodules filler, since the eighties puts goods on the market, has had applicating history for many years, it is with specific surface area at home Greatly, porosity is high, holding filth capacity is big, drag losses is little, filtering velocity is high, effluent quality is good and recommended by water process insider, Receive the favorable comment of users.But common fibrous nodules filler is generally used for water process, for the absorption of waste gas, it is worth grinding Study carefully.
Content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of Olive leaf P.E be used in producing absorbing useless The spray tower packing of gas, the absorption of waste gas in producing for Olive leaf P.E.
For reaching above-mentioned purpose, a kind of Olive leaf P.E of the present invention is used for absorbing the spray column of waste gas in producing Filler, is made by the steps and obtains：
1) raw material prepares：Prepare cellosilk, litchi rind；
2) process of litchi rind：
1. pulverization process：The pure water being equivalent to litchi rind 8-10 weight is added, with high speed shear breast after pulverizing or smashing Change machine is processed, and is then processed in 25 DEG C with high pressure microjet Ultra-Micro Grinding Equipment, and processing pressure is 50-60MPa, processes secondary Number is 2-3 time, obtains paste serous material；
2. steam explosion：Steam explosion tank put into by the material that 1. step is obtained, and burst pressure 3.0-3.5Mpa, during pressurize Between maintain 150-200s；
3. decoct：The pure water of the weights such as the material addition that 2. step is obtained decocts 2 times, 1 hour every time, is extracted Liquid, filters, united extraction liquid, and filtrate is concentrated into surveys the extractum that relative density is 1.30 when 70 DEG C, be dried, sieve, obtain powder；
3) by cellosilk bunchy, so that fibre bundle is clamped and stretch；
4) with ultrasonic bonding head, the fusing of fibre bundle interval is formed clinkering point, while fusing, adds step 2) obtain Litchi rind powder, is conveyed the good fibre bundle of clinkering by actuating device；
5) carried out with blade cutting the fiberfill forming same size, launched for constraint point with the clinkering point of fiberfill Fibre bundle forms fibrous nodules of different shapes, obtains filler.
Step 1 of the present invention) described in cellosilk, litchi rind, preferably according to 90-95：5-10 weight ratio, further preferably 95:5 weight ratio.
Step 2) described in high-speed shearing emulsion machine process, preferably time 10-20min, rotating speed be 8000-12000r/ min；Described sieves, and preferably crosses 80 mesh sieves.
Compared to existing technology, it is an advantage of the current invention that：
1st, the feature of the fibrous nodules filtering can reach the purpose of clean water with the various impurity in filter water, but works as When containing substantial amounts of waste gas in water, common fibrous nodules filler but can not play preferable effect, and the present invention passes through modification Fibrous nodules filler, when contacting with the water containing waste gas, can with the waste gas in active adsorption water, and, the filler that the present invention obtains, first Contacted with hydrone, form the protecting film of one layer of water on fibrous nodules filler surface, wrap waste gas it is easy to be flush with water Get off.
2nd, the present invention is by adding the litchi rind of special handling come modified, the litchi rind to fibrous nodules in fibrous nodules filler In contain substantial amounts of cellulose, the macromolecular polysaccharide that cellulose is made up of glucose, water insoluble and common organic solvents, be The main component of plant cell wall, but the fiber in litchi rind plant cell is bondd by lignin, not easy fracture.The present invention is first Using high pressure microjet superfine communication technique process litchi rind, can fully disconnect the fiber of litchi rind, then using pressurized treatments, Steam explosion, under high temperature, high steam act on, cellulose crystallity improves, and the degree of polymerization declines, and hemicellulose fraction is degraded, Lignin softens, and horizontal strength of connection declines, or even softens plastic, when the material sudden pressure reduction full of steam, in hole Gas acute expand, produce " explosion " effect, lignin can be partially stripped, and raw material is torn as fiber fines.By such place Reason, can utilize the cellulose in litchi rind well, produce package action to emission molecule.If adopting 100-1000MPa Pressure treatment, albumen in plant material, polysaccharose substance structure can be led to change, thus reducing the modified effect of fibrous nodules Really.
3rd, adopt the method for the present invention, can effectively absorb substantial amounts of foul waste gas in Olive leaf P.E production process, Absorbed using the spray column invading the interior of the alkali liquor that with the addition of xanthan gum in 3-4 level compared to existing technology, effect is obvious, and, this Bright be utilized in 1-2 level and with the addition of absorbing in the spray column of filler, shorten the operation used time, saved cost.
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 Olive leaf P.E is used for absorbing the spray tower packing of waste gas in producing, and is made by the steps and obtains：
1) raw material prepares：Prepare cellosilk 90kg, litchi rind 10kg；
2) process of litchi rind：
1. pulverization process：The pure water being equivalent to litchi rind 8-10 weight is added, with high speed shear breast after pulverizing or smashing Change machine is processed, time 10min, and rotating speed is 12000r/min, then with high pressure microjet Ultra-Micro Grinding Equipment at 25 DEG C Reason, processing pressure is 50MPa, and number of processes is 2-3 time, obtains paste serous material；
2. steam explosion：The material that 1. step is obtained puts into steam explosion tank, burst pressure 3.0Mpa, and the dwell time ties up Hold in 200s；
3. decoct：The pure water of the weights such as the material addition that 2. step is obtained decocts 2 times, 1 hour every time, is extracted Liquid, filters, united extraction liquid, and filtrate is concentrated into surveys the extractum that relative density is 1.30 when 70 DEG C, be dried, cross 80 mesh sieves, obtain powder End；
3) by cellosilk bunchy, so that fibre bundle is clamped and stretch；
4) with ultrasonic bonding head, the fusing of fibre bundle interval is formed clinkering point, while fusing, adds step 2) obtain Litchi rind powder, is conveyed the good fibre bundle of clinkering by actuating device；
5) carried out with blade cutting the fiberfill forming same size, launched for constraint point with the clinkering point of fiberfill Fibre bundle forms fibrous nodules of different shapes, obtains filler.
Embodiment 2：
A kind of Olive leaf P.E is used for absorbing the spray tower packing of waste gas in producing, and is made by the steps and obtains：
1) raw material prepares：Prepare cellosilk 92kg, litchi rind 8kg；
2) process of litchi rind：
1. pulverization process：The pure water being equivalent to litchi rind 8-10 weight is added, with high speed shear breast after pulverizing or smashing Change machine is processed, time 20min, and rotating speed is 8000r/min, then with high pressure microjet Ultra-Micro Grinding Equipment at 25 DEG C Reason, processing pressure is 55MPa, and number of processes is 2-3 time, obtains paste serous material；
2. steam explosion：The material that 1. step is obtained puts into steam explosion tank, burst pressure 3.5Mpa, and the dwell time ties up Hold in 150s；
3. decoct：The pure water of the weights such as the material addition that 2. step is obtained decocts 2 times, 1 hour every time, is extracted Liquid, filters, united extraction liquid, and filtrate is concentrated into surveys the extractum that relative density is 1.30 when 70 DEG C, be dried, cross 80 mesh sieves, obtain powder End；
3) by cellosilk bunchy, so that fibre bundle is clamped and stretch；
4) with ultrasonic bonding head, the fusing of fibre bundle interval is formed clinkering point, while fusing, adds step 2) obtain Litchi rind powder, is conveyed the good fibre bundle of clinkering by actuating device；
5) carried out with blade cutting the fiberfill forming same size, launched for constraint point with the clinkering point of fiberfill Fibre bundle forms fibrous nodules of different shapes, obtains filler.
Embodiment 3：
A kind of Olive leaf P.E is used for absorbing the spray tower packing of waste gas in producing, and is made by the steps and obtains：
1) raw material prepares：Prepare cellosilk 95kg, litchi rind 5kg；
2) process of litchi rind：
1. pulverization process：The pure water being equivalent to litchi rind 8-10 weight is added, with high speed shear breast after pulverizing or smashing Change machine is processed, time 15min, and rotating speed is 10000r/min, then with high pressure microjet Ultra-Micro Grinding Equipment at 25 DEG C Reason, processing pressure is 60MPa, and number of processes is 2-3 time, obtains paste serous material；
2. steam explosion：The material that 1. step is obtained puts into steam explosion tank, burst pressure 3.5Mpa, and the dwell time ties up Hold in 180s；
3. decoct：The pure water of the weights such as the material addition that 2. step is obtained decocts 2 times, 1 hour every time, is extracted Liquid, filters, united extraction liquid, and filtrate is concentrated into surveys the extractum that relative density is 1.30 when 70 DEG C, be dried, cross 80 mesh sieves, obtain powder End；
3) by cellosilk bunchy, so that fibre bundle is clamped and stretch；
4) with ultrasonic bonding head, the fusing of fibre bundle interval is formed clinkering point, while fusing, adds step 2) obtain Litchi rind powder, is conveyed the good fibre bundle of clinkering by actuating device；
5) carried out with blade cutting the fiberfill forming same size, launched for constraint point with the clinkering point of fiberfill Fibre bundle forms fibrous nodules of different shapes, obtains filler.
Comparative example 1：
1) raw material prepares：Prepare cellosilk 95kg；
2) by cellosilk bunchy, so that fibre bundle is clamped and stretch；
3) with ultrasonic bonding head, the fusing of fibre bundle interval is formed clinkering point, the good fibre bundle of clinkering by actuating device Conveying；
4) carried out with blade cutting the fiberfill forming same size, launched for constraint point with the clinkering point of fiberfill Fibre bundle forms fibrous nodules of different shapes, obtains filler.
Comparative example 2：
1) raw material prepares：Prepare cellosilk 95kg, litchi rind 5kg；
2) process of litchi rind：
1. steam explosion：After litchi rind chopping or pulverizing, put into steam explosion tank, burst pressure 3.5Mpa, pressurize Time maintains 180s；
2. decoct：The pure water of the weights such as the material addition that 1. step is obtained decocts 2 times, 1 hour every time, is extracted Liquid, filters, united extraction liquid, and filtrate is concentrated into surveys the extractum that relative density is 1.30 when 70 DEG C, be dried, cross 80 mesh sieves, obtain powder End；
3) by cellosilk bunchy, so that fibre bundle is clamped and stretch；
4) with ultrasonic bonding head, the fusing of fibre bundle interval is formed clinkering point, while fusing, adds step 2) obtain Litchi rind powder, is conveyed the good fibre bundle of clinkering by actuating device；
5) carried out with blade cutting the fiberfill forming same size, launched for constraint point with the clinkering point of fiberfill Fibre bundle forms fibrous nodules of different shapes, obtains filler.
Comparative example 3：
1) raw material prepares：Prepare cellosilk 95kg, litchi rind 5kg；
2) process of litchi rind：
1. pulverization process：The pure water being equivalent to litchi rind 8-10 weight is added, with high speed shear breast after pulverizing or smashing Change machine is processed, time 15min, and rotating speed is 10000r/min, then with high pressure microjet Ultra-Micro Grinding Equipment at 25 DEG C Reason, processing pressure is 60MPa, and number of processes is 2-3 time, obtains paste serous material；
2. decoct：The pure water of the weights such as the material addition that 1. step is obtained decocts 2 times, 1 hour every time, is extracted Liquid, filters, united extraction liquid, and filtrate is concentrated into surveys the extractum that relative density is 1.30 when 70 DEG C, be dried, cross 80 mesh sieves, obtain powder End；
3) by cellosilk bunchy, so that fibre bundle is clamped and stretch；
4) with ultrasonic bonding head, the fusing of fibre bundle interval is formed clinkering point, while fusing, adds step 2) obtain Litchi rind powder, is conveyed the good fibre bundle of clinkering by actuating device；
5) carried out with blade cutting the fiberfill forming same size, launched for constraint point with the clinkering point of fiberfill Fibre bundle forms fibrous nodules of different shapes, obtains filler.
Experimental example：
In Olive leaf P.E production, the processing method of waste gas, comprises the steps：
1) spray column absorbs：Enter spray column after in the exhaust gas centralized producing in producing to process；
Spray column is the two-stage of series connection, and two-stage spray column built with the filler of embodiment, the liquid phase substance in spray column is Water, two grades of spray columns shield, and couple with subsequent technique process；
2) process the gas completing and pass through pipeline to factory's inner chimney high altitude discharge.
Comparative example：
1) spray column absorbs：Enter spray column after in the exhaust gas centralized producing in producing to process；
Spray column be series connection level Four, the liquid phase substance in spray column is water, and two grades of spray columns shield, and with rear Continuous PROCESS FOR TREATMENT connection；
2) process the gas completing and pass through pipeline to factory's inner chimney high altitude discharge；
Spray column is the level Four of series connection, and the concentration that the liquid phase substance in level Four spray column respectively with the addition of xanthan gum is 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, concentration is higher Alkali liquor be 2% mass concentration Na2CO3Solution, the relatively low alkali liquor of concentration is the Na of 1% mass concentration2CO3Solution, in alkali liquor All with the addition of the xanthan gum of 0.5% mass concentration.
Conclusion：The result of embodiment 3 is far superior to comparative example.

Claims (5)

1. for absorbing the spray tower packing of waste gas it is characterised in that as follows during a kind of Olive leaf P.E produces Prepare：
1) raw material prepares：Prepare cellosilk, litchi rind；
2) process of litchi rind：
1. pulverization process：Add, after pulverizing or smashing, the pure water being equivalent to litchi rind 8-10 weight, use high-speed shearing emulsion machine Process, then processed in 25 DEG C with high pressure microjet Ultra-Micro Grinding Equipment, processing pressure is 50-60MPa, number of processes is 2-3 time, obtain paste serous material；
2. steam explosion：The material that 1. step is obtained puts into steam explosion tank, burst pressure 3.0-3.5Mpa, and the dwell time ties up Hold in 150-200s；
3. decoct：The pure water of the weights such as the material addition that 2. step is obtained decocts 2 times, 1 hour every time, obtains extracting solution, mistake Filter, united extraction liquid, filtrate is concentrated into surveys the extractum that relative density is 1.30 when 70 DEG C, be dried, sieve, obtain powder；
3) by cellosilk bunchy, so that fibre bundle is clamped and stretch；
4) with ultrasonic bonding head, the fusing of fibre bundle interval is formed clinkering point, while fusing, adds step 2) Fructus Litchi that obtains Corium farinosum end, is conveyed the good fibre bundle of clinkering by actuating device；
5) carried out with blade cutting the fiberfill forming same size, fiber is launched for constraint point with the clinkering point of fiberfill Bundle forms fibrous nodules of different shapes, obtains filler.
2., for absorbing the spray tower packing of waste gas during a kind of Olive leaf P.E according to claim 1 produces, it is special Levy and be：Step 1) described in cellosilk, litchi rind, according to 90-95：5-10 weight ratio.
3., for absorbing the spray tower packing of waste gas during a kind of Olive leaf P.E according to claim 2 produces, it is special Levy and be：Step 1) described in cellosilk, litchi rind, according to 95：5 weight ratios.
4., for absorbing the spray tower packing of waste gas during a kind of Olive leaf P.E according to claim 1 produces, it is special Levy and be：Step 2) described in high-speed shearing emulsion machine process, time 10-20min, rotating speed be 8000-12000r/min.
5., for absorbing the spray tower packing of waste gas during a kind of Olive leaf P.E according to claim 1 produces, it is special Levy and be：Step 2) described in sieve, be 80 mesh sieves.
CN201611080906.4A 2016-11-30 2016-11-30 Spray tower filler for absorbing waste gas in olive leaf extract production Pending CN106378085A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202343096U (en) * 2011-12-09 2012-07-25 广州格淋环境保护技术有限公司 Efficient deodorization system for organic waste gas
CN105056626A (en) * 2015-08-31 2015-11-18 曾金华 Hydrophilic oleophobic filter material and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202343096U (en) * 2011-12-09 2012-07-25 广州格淋环境保护技术有限公司 Efficient deodorization system for organic waste gas
CN105056626A (en) * 2015-08-31 2015-11-18 曾金华 Hydrophilic oleophobic filter material and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
闫军: "蒸汽爆破技术的研究", 《现代农业科技》 *

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RJ01 Rejection of invention patent application after publication

Application publication date: 20170208

RJ01 Rejection of invention patent application after publication