CN101289639B - Process for extracting oil for feedstuff from waste grease - Google Patents
Process for extracting oil for feedstuff from waste grease Download PDFInfo
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- CN101289639B CN101289639B CN200810060629XA CN200810060629A CN101289639B CN 101289639 B CN101289639 B CN 101289639B CN 200810060629X A CN200810060629X A CN 200810060629XA CN 200810060629 A CN200810060629 A CN 200810060629A CN 101289639 B CN101289639 B CN 101289639B
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- oil
- waste grease
- deodorization
- phosphoric acid
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/74—Recovery of fats, fatty oils, fatty acids or other fatty substances, e.g. lanolin or waxes
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- Fats And Perfumes (AREA)
- Fodder In General (AREA)
Abstract
The invention discloses a technique for adopting waste grease to abstract feed oil, comprising the following steps in turn: pretreatment, decolourization, filtration, deodorization and so on. The technique is as follows: firstly, salt solution is added into the waste grease for water scrubbing; secondly, concentrated phosphoric acids are added into the mixture for pretreatment; thirdly, carclazyte absorption impurities and phosphoric acids are added into the mixture; fourthly, filtration is performed and bleached soil particles are removed; fifthly, deoxidation and low-temperature deodorization treatments are performed; sixthly, mixed feed oil is obtained through temperature reduction of refined fat. The technique obtains the feed oil through low-temperature physical abstraction of the waste grease; utilization of the waste grease is favorable for improving the environmental quality, promoting the animal health, putting an end to influxion of harmful resources into the society and protecting sound mind and body and safety of citizens; and the technique adopts abstracted oil with a price of RMB 7000 or so per ton to replace edible oil for human beings with a price of more than RMB 2000 per ton and uses the abstracted oil as feed additives, thereby greatly reducing the cost of raw materials of feed manufacturers. Moreover, the technique has outstanding social benefit and economic benefit.
Description
[technical field]
The present invention relates to grease and refine the field, specifically is a kind of technology that adopts the old oil of frying, livestock and poultry processing enterprise depleted lard, cattle and sheep wet goods to extract feedstuff oil.
[technical background]
The restaurant refiltered oil is that catering industry is fried in shallow oil the abendoned oil that is produced in the stir-fry process, purchased after the processing den dehydration of " sewer oil " by illegal retailer, after the supervisor that goes to distinguish the flavor of is handled, with dilute sulphuric acid etc. impurity is precipitated again, just become limpid " edible oil ", the predominating path of these refiltered oil circulations is to sell to individual eating and drinking establishment and mobile food and drink stand and the food-processing workshop raw material as fried food product, perhaps be sold to the middle-size and small-size food and beverage enterprise of the lawless operation of part, even directly be processed into the barreled edible oil and on market, sell, or on market, sell after the restaurant refiltered oil mixed plam oil, final these refiltered oils are got back to again on people's the dining table, are having a strong impact on the healthy of human consumer.
Restaurant refiltered oil and poor quality oil are very big to the harm of human body.Be mixed with large amount of sewage, rubbish and washing composition in the refiltered oil of restaurant, open-air refinement through underground workshop, can't remove at all and degerm and harmful chemical component, main harm shows as: can cause dizzy, headache after the people is edible, feel sick, vomiting, abdominal pain and intestines and stomach disease.Measure according to scientific experimentation, the carbonyl valency of restaurant refiltered oil is the edible oil sanitary index of national regulation head and shoulders above.The grease that becomes sour can produce detrimental effect to several enzyme systems such as cytopigment enzyme of body.Because the restaurant refiltered oil is sneaked in the edible oil in the mode of blending, violent food poisoning reaction can't occur after the people is edible, even may have no consciousness, but can bury morbific hidden danger.
At present, internal feed processing enterprise uses various animals and plants crude oils such as plam oil, soya-bean oil, butter, sheep oil, fish oil to make additive in a large number, make edible oil resource anxiety very, China since 2007 the edible oil price increase powerful, the price rises of plam oil, soya-bean oil, peanut oil is compared with 2006, almost doubles.Annual soybean import reached 3,100 ten thousand tons in 2007, the vegetables oil import volume is expected to be 8,400,000 tons, annual import grease oil plant amount to edible oil will be up to 1,500 ten thousand tons about, the external dependency degree of domestic vegetables oil demand also rose to 62.5% from 56.8% of last year, had totally improved 5.5 percentage points.The recent price of soya-bean oil has increased to per ton more than 10,000 yuan, because the fast development of biofuel industry, the animal-plant oil price will be moved in a high position for a long time.Feedstuff industry is an industry that rate of profit is lower, the rise of these main raw materials, make feed processing enterprise cost generally increase substantially, therefore, how to find big, the at a low price relative and safe feed oil source of a kind of amount to become the key factor of raising enterprise competitiveness.
[summary of the invention]
Purpose of the present invention is exactly in order to solve problems of the prior art, proposes a kind of technology that adopts waste grease to refine feedstuff oil, can rationally utilize human unedible waste grease, and reduces the cost of feedstuff oil.
For achieving the above object, patent of the present invention has proposed a kind of technology that adopts waste grease to refine feedstuff oil, in turn includes the following steps:
Pre-treatment: in waste grease, add and add strong phosphoric acid again after salt solution is washed, pump into bleacher behind the stop 15-30min down at 90-110 ℃;
Decolouring: add aqueous carclazyte in the bleacher, the add-on of carclazyte is the 0.8%-2.0% of waste grease quality, and carclazyte absorption impurity and phosphoric acid form bleaching clay;
Filter: the slurry of oil-containing and bleaching clay is removed the bleaching clay grain by filtration unit, obtain pre-treatment oil transparent, light clear look;
Deodorization: earlier pre-treatment oil is carried out deoxidation, then by heat exchanger with oily temperature rise to 210-220 ℃, pump into the deodorization tower again and carry out deodorization, free fatty acids, easy volatile small molecules stink substance, oxide compound are distilled out the deodorization tower together, deodorization temperature is controlled at below 220 ℃;
Cooling: the polished fat after the deodorization is cooled to 55-65 ℃ becomes mixed fodder oil.
As preferably, the strong phosphoric acid of adding in the described pre-treatment step is that concentration is the phosphoric acid of 80%-85%, and the phosphoric acid addition is the 0.05%-0.2% of waste grease quality.
As preferably, vacuum degree control is at 2.6-3.3KPa in the described decolouring step, and temperature is controlled at 95-110 ℃, and the residence time is 30-40min.
As preferably, adopt the coarse filtration of diatomite precoating filter in the described filtration step earlier, again filter oil is filtered by deep bed filter is refining.
As preferably, the pressure in the described deodorization step in the deodorization tower is controlled at 266.6-666.5Pa.
The beneficial effect of patent of the present invention: the present invention carries out low-temperature physics to waste grease and refines; obtain feedstuff oil; utilization to waste grease helps improving environmental quality, promotes animal health, stops to be harmful to resource inflow society; protection citizen's physical and mental health and safety; the human edible oil that adopts lard oil per ton about 7000 yuan to substitute surplus in the of per ton 10000 yuan is made fodder additives, greatly reduces the raw materials cost of fodder production enterprise.Have outstanding social benefit and economic benefit.
[description of drawings]
Fig. 1 is a kind of FB(flow block) that adopts waste grease to refine the technology of feedstuff oil of the present invention.
[embodiment]
Consult Fig. 1, adopt waste grease to refine the technology of feedstuff oil, in turn include the following steps:
Pre-treatment 1: in waste grease, add and add strong phosphoric acid again after salt solution is washed, pump into bleacher behind the stop 15-30min down at 90-110 ℃; The strong phosphoric acid of adding is that concentration is the phosphoric acid of 80%-85%, and the phosphoric acid addition is the 0.05%-0.2% of waste grease quality.The purpose that adds strong phosphoric acid is to remove wherein colloid, makes nonhydratable phosphatide curding out in the oil.
Decolouring 2: add aqueous carclazyte in the bleacher, the add-on of carclazyte is the 0.8%-2.0% of waste grease quality, and carclazyte absorption impurity and phosphoric acid form bleaching clay; Vacuum degree control is at 2.6-3.3KPa, and temperature is controlled at 95-110 ℃, and the residence time is 30-40min.Adsorbing and removing is carried out in employing, and its addition depends on the quality of waste grease.The interpolation of carclazyte mainly contains following 4 effects: 1. adsorb impurity, as trace metal, moisture, oily insolubles and pigment; 2. reduce the content of oxide compound; 3. adsorb phosphatide; 4. adsorb after the depickling residual phosphoric acid in the oil.Also can residual certain pigment in pretreated grease, because bleaching clay can not be removed all pigments.However, it is very crucial removing phosphoric acid residual in the grease fully in the decolouring stage, otherwise residual phosphoric acid can make free fatty acid content rise, and also can finally have influence on the refining cast of oil simultaneously.
Filter 23: the slurry of oil-containing and bleaching clay is removed the bleaching clay grain by filtration unit, obtain pre-treatment oil transparent, light clear look; Adopt the coarse filtration of diatomite precoating filter earlier, again filter oil is filtered by deep bed filter is refining.For ensuring the quality of products, filter oil is filtered the bleaching clay grain that stays by pocket type series strainer is refining to remove again for the first time.This is very necessary because in pre-treatment oil if there is the existence of useless bleaching clay grain can reduce the oxidative stability of finished product refining oil.
Deodorization 4: earlier pre-treatment oil is carried out deoxidation, then by heat exchanger with oily temperature rise to 210-220 ℃, pump into the deodorization tower again and carry out deodorization, free fatty acids, easy volatile small molecules stink substance, oxide compound are distilled out the deodorization tower together, deodorization temperature is controlled at below 220 ℃; Pressure in the deodorization tower is controlled at 266.6-666.5Pa.Residence time is 90-120 minute in the deodorization tower.Waste grease is finished deoxidation, deodorising process in a stainless steel deodorization tower, and with respect to traditional grease physical refining, the time that waste grease is detained in the deodorization tower is shorter.Deodorization temperature is controlled at below 220 ℃, to reduce the loss of vitamin-E and vitamin A.Under the stirring of suitable temperature and open steam, the free fatty acids in the waste grease, easy volatile small molecules stink substance, oxide compound distill out the deodorization tower together.These oxide compounds mainly are aldehyde, letones, if they are not removed totally, will bring bad smell to refining oil.
Cooling 5: the polished fat after the deodorization is cooled to 55-65 ℃ becomes mixed fodder oil.
The byproduct that waste grease is produced in the low-temperature physics refining process mainly is the overhead product that takes off that produces in the deodorization procedures, its principal constituent is a distilled fatty acid, content is 80%-90%, and distilled fatty acid is the important source material of soapmaking and oil and fat chemical, can be used as the industrial raw material utilization again.
To fry the multiple waste grease processing of refiltered oil, lard, soya-bean oil, cattle and sheep wet goods is integrated in cover technology and the equipment refining and finishes.Guarantee that by the low-temperature physics refining greasy nutritive ingredient is not destroyed, and guarantees oil quality simultaneously.
Greasy refining is divided into chemical refining and physical refining, is example with food oils, and soybean oil and the vegetables oil that corn wet goods acid value is low and phospholipids content is high generally adopt chemical refining.So-called chemical refining is exactly by adding in the alkali and greasy free fatty acids, to reach the purified purpose.This technology main drawback is the trade effluent that produces fat content 20-30%, and these trade effluents must just can discharge by the biochemical treatment of strictness.
Owing to feed crude oil acid number is higher, surpass 30mgKOH/g sometimes, if adopt the chemical refining method to take off lipid acid,, cause the grease yield to descend during separation owing to soaps a large amount of in the alkali with generation, generally be no more than 80%.This low yield will be offset the cheap advantage of cost of material.
Physical refining is a kind of when high temperature, directly feeds steam in grease, when high vacuum, and the method that lipid acid is removed in distillation.In the edible oil processing industry, because the final acid value of product requires to be lower than 0.2mgKOH/g, promptly free fatty acid content is lower than 0.1% in the grease.General requirement just can reach this effect at 240-260 ℃ high temperature when physics is concise.What edible oil generally adopted physical refining is crude oil acid value height and the low oil product of phospholipids content, as plam oil, Oleum Cocois, lard, butter, fish oil etc.If the physical refining temperature is too high, the danger that produces trans fatty acid and reduce vitamin-E and sterol content in the grease is just arranged.Physical refining requires very strict to pre-treatment, enter and take off before the lipid acid, and greasy phosphorus content must be less than 5mg/kg, and not so the finished product grease color will be deepened.
Different with the edible oil physical refining, because feed oil production control free fatty acid content is at 5-7%.So adopt the temperature that reduces physical refining to 210-220 ℃, low temperature on the one hand can be energy-conservation, also can keep the nutritive property of feed fat in addition on the one hand.Low-temperature physics refined product yield is up to 95%, and do not have processing wastewater, the technological process compliance with environmental protection requirements.
The foregoing description is to explanation of the present invention, is not limitation of the invention, any scheme after the simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (4)
1. adopt waste grease to refine the technology of feedstuff oil, it is characterized in that: in turn include the following steps:
(1) pre-treatment: in waste grease, add and add strong phosphoric acid again after salt solution is washed, pump into bleacher behind the stop 15-30min down at 90-110 ℃, the strong phosphoric acid of adding is that concentration is the phosphoric acid of 80%-85%, and the phosphoric acid addition is the 0.05%-0.2% of waste grease quality;
(2) decolouring: add aqueous carclazyte in the bleacher, the add-on of carclazyte is the 0.8%-2.0% of waste grease quality, and carclazyte absorption impurity and phosphoric acid form bleaching clay;
(3) filter: will remove the bleaching clay grain by filtration unit through the oil-containing of (2) decolouring step and the slurry of bleaching clay, and obtain transparent, light orange pre-treatment oil;
(4) deodorization: earlier the pre-treatment oil that obtains in (3) filtration step is carried out deoxidation, then by heat exchanger with oily temperature rise to 210-220 ℃, pump into the deodorization tower again and carry out deodorization, free fatty acids, easy volatile small molecules stink substance, oxide compound are distilled out the deodorization tower together, and deodorization temperature is controlled at below 220 ℃;
(5) cooling: the polished fat after the deodorization is cooled to 55-65 ℃ becomes mixed fodder oil.
2. employing waste grease as claimed in claim 1 refines the technology of feedstuff oil, it is characterized in that: vacuum degree control is at 2.6-3.3KPa in described (2) decolouring step, and temperature is controlled at 95-110 ℃, and the residence time is 30-40min.
3. employing waste grease as claimed in claim 1 refines the technology of feedstuff oil, it is characterized in that: adopt the coarse filtration of diatomite precoating filter in described (3) filtration step earlier, will filter by deep bed filter is refining through the oil after the coarse filtration.
4. as the technology of any one described employing waste grease refinement feedstuff oil in the claim 1 to 3, it is characterized in that: the pressure-controlling in described (4) deodorization step in the deodorization tower is at 266.6-666.5Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810060629XA CN101289639B (en) | 2008-04-14 | 2008-04-14 | Process for extracting oil for feedstuff from waste grease |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810060629XA CN101289639B (en) | 2008-04-14 | 2008-04-14 | Process for extracting oil for feedstuff from waste grease |
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| Publication Number | Publication Date |
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| CN101289639A CN101289639A (en) | 2008-10-22 |
| CN101289639B true CN101289639B (en) | 2011-05-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101797012B (en) * | 2010-02-05 | 2011-11-30 | 杨玉峰 | Production process of feed oil |
| CN102051267B (en) * | 2010-12-31 | 2013-03-27 | 西安中润环保科技有限公司 | Industrialized treatment facility and method for catering wastes |
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Denomination of invention: Process for extracting oil for feedstuff from waste grease Effective date of registration: 20170810 Granted publication date: 20110525 Pledgee: Agricultural Bank of China, Limited by Share Ltd, Changxing County branch Pledgor: Lin Zhiyong Registration number: 2017980000335 |
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Granted publication date: 20110525 Termination date: 20180414 |