阅读说明：本技术 一种地沟油超高连续脱胶方法及装置 (Ultrahigh continuous degumming method and device for illegal cooking oil ) 是由 李学兵 王�忠 李青洋 于 2018-07-11 设计创作，主要内容包括：本发明属于化学化工领域,具体的说一种地沟油超高连续脱胶方法及装置。脱胶罐中将除杂的地沟油搅拌条件下加热至50-70℃得粗油,将酸加入其中,再于50-70℃的恒温下反应15-30min；反应后与洗涤水混匀得油水混合液,向油水混合液中加入磷脂酶于50-70℃的恒温下反应1-4h,而后离心实现对地沟油的脱胶。本发明提供的一种地沟油超高连续脱胶技术及装备,不仅超高连续脱胶更易于实现工业化,而且用酸-水-酶联合脱胶法脱胶效果更显著,同时脱胶后的废水可加入水可加入碳酸钙,使磷酸结晶成盐析出,回收用作磷肥,而且本发明工艺流程简单,绿色环保,具有显著的经济和社会效益。(The invention belongs to the field of chemistry and chemical engineering, and particularly relates to an ultrahigh continuous degumming method and device for illegal cooking oil. Heating the decontaminated waste oil to 50-70 deg.C under stirring in a degumming tank to obtain crude oil, adding acid, and reacting at 50-70 deg.C for 15-30 min; after reaction, the mixture is mixed with washing water to obtain oil-water mixed liquor, phospholipase is added into the oil-water mixed liquor to react for 1 to 4 hours at the constant temperature of 50 to 70 ℃, and then the mixture is centrifuged to realize the degumming of the illegal cooking oil. The ultrahigh continuous degumming technology and equipment for the illegal cooking oil provided by the invention not only can realize industrialization easily due to ultrahigh continuous degumming, but also have more remarkable degumming effect due to an acid-water-enzyme combined degumming method, and simultaneously, calcium carbonate can be added into water in the wastewater after degumming to crystallize and separate out phosphate and recycle the phosphate for use as a phosphate fertilizer.)

1. An ultrahigh continuous degumming method for illegal cooking oil is characterized by comprising the following steps: heating the decontaminated waste oil to 50-70 deg.C under stirring in a degumming tank to obtain crude oil, adding acid, and reacting at 50-70 deg.C for 15-30 min; after reaction, the mixture is mixed with washing water to obtain oil-water mixed liquor, phospholipase is added into the oil-water mixed liquor to react for 1 to 4 hours at the constant temperature of 50 to 70 ℃, and then the mixture is centrifuged to realize the degumming of the illegal cooking oil.

2. The ultrahigh-continuous degumming method for illegal cooking oil according to claim 1, characterized in that: and adding calcium carbonate into the centrifuged water layer to crystallize and precipitate phosphoric acid, and recycling the phosphoric acid.

3. The ultrahigh-continuous degumming method for illegal cooking oil according to claim 1, characterized in that: and mixing the crude oil reacted with the acid with washing water, injecting the mixture into a dynamic reactor, uniformly mixing, introducing the mixture into a degumming tank, and reacting with phospholipase.

4. The ultrahigh-continuous degumming method for illegal cooking oil according to claim 1, characterized in that: the impurity-removed swill-cooked dirty oil is obtained by filtering and centrifuging the swill-cooked dirty oil; wherein, the filtration is performed by adopting an inorganic filter membrane.

5. The ultrahigh-continuous degumming method for illegal cooking oil according to claim 4, characterized in that: the inorganic filter membrane is a ceramic membrane or an alumina membrane; the acid is citric acid, phosphoric acid or oxalic acid; the phospholipase is phosphomonoesterase, phosphodiesterase, apyrase, pyrophosphatase or metaphosphatase.

6. The ultrahigh-continuous degumming device for the illegal cooking oil according to claim 1, which is characterized in that: the device comprises a degumming tank (7), a trench oil tank (1), an acid tank (2), an enzyme tank (3), a stirrer (8) and a dynamic reactor (5), wherein the stirrer (8) is arranged in an external heater (16) at the bottom of the degumming tank (7), the acid tank (2) and the enzyme tank (3) are connected to the two sides of the degumming tank (7) in a penetrating way through pipelines, the trench oil tank (1) and a centrifugal device (6) are respectively communicated with the degumming tank (7) through pipelines, a flow controller (9) and the dynamic reactor (5) are sequentially connected through the pipelines, and the other ends of the flow controller (9) and the dynamic reactor (5) are respectively connected with the degumming tank (7) through the pipelines.

7. The ultrahigh-continuous degumming device for illegal cooking oil according to claim 6, characterized in that: the flow controller (9) is connected with the water tank (4).

8. The ultrahigh-continuous degumming device for illegal cooking oil according to claim 6 or 7, characterized in that: valves are respectively arranged on pipelines connected with the swill-cooked dirty oil tank (1), the acid tank (2), the enzyme tank (3), the centrifugal device (6), the flow controller (9) and the degumming tank (7), and valves are arranged on pipelines between the flow controller (9) and the water tank (4).

9. The ultrahigh-continuous degumming device for illegal cooking oil according to claim 6, characterized in that: and a plurality of spray heads are arranged on a pipeline which penetrates through the degumming tank (7) and is connected with the acid tank (2) and the enzyme tank (3).

Technical Field

The invention belongs to the field of chemistry and chemical engineering, and particularly relates to an ultrahigh continuous degumming method and device for illegal cooking oil.

Background

The waste oil is a general name of various waste oils and fats and is divided into three types according to sources: firstly, waste grease is generated in daily operation processes of catering enterprises such as hotels, restaurants and the like; waste oil and fat produced by residents in the daily diet process; and thirdly, waste oil and fat such as soapstock, frying old oil and the like generated in the production process of food and oil processing enterprises. The quality of the illegal cooking oil is extremely poor, toxic and harmful components seriously exceed the standard, and the illegal cooking oil is directly discharged to cause environmental pollution; long-term ingestion causes food poisoning, induces disease, and even carcinogenesis. If the waste oil is recycled as a resource, the waste oil can be synthesized into the biodiesel through transesterification. However, the presence of the colloid-soluble impurities affects not only the stability of the illegal cooking oil, but also the technological effects of the refining and deep processing of the illegal cooking oil. The biodiesel thus produced may be incompletely combusted, have a high residue content, and may cause significant wear on moving parts of the engine. Therefore, the peptizing impurities must first be removed.

The traditional degumming methods include hydration degumming, acidification degumming, derivative adsorption degumming, enzyme degumming and the like. The traditional hydration degumming and acidification degumming have simple operation and general degumming effect; the adsorption degumming requires long-time standing, the degumming effect is general, and the operation difficulty is large; the enzymatic degumming is rarely used for industrial production due to the uneven reaction in the enzymatic hydrolysis process, the unstable gum impurity content of degummed oil and the like, and the enzymatic degumming can cause the acid value of degummed oil to be higher, thus increasing the difficulty of subsequent deacidification. Therefore, factors such as raw oil properties, equipment investment, operation complexity and the like need to be comprehensively considered when the raw oil is specifically selected.

Disclosure of Invention

The invention aims to provide an ultrahigh continuous degumming method and device for illegal cooking oil.

In order to achieve the purpose, the invention adopts the technical scheme that:

a method for ultra-high continuous degumming of illegal cooking oil comprises heating the illegal cooking oil to 50-70 deg.C under stirring in a degumming tank to obtain crude oil, adding acid, and reacting at 50-70 deg.C for 15-30 min; after reaction, the mixture is mixed with washing water to obtain oil-water mixed liquor, phospholipase is added into the oil-water mixed liquor to react for 1 to 4 hours at the constant temperature of 50 to 70 ℃, and then the mixture is centrifuged to realize the degumming of the illegal cooking oil.

And adding calcium carbonate (the calcium carbonate is industrial calcium carbonate) into the centrifuged water layer to crystallize and separate out the phosphoric acid for recycling.

Mixing the crude oil reacted with the acid with washing water, injecting the mixture into a dynamic reactor, uniformly mixing, introducing the mixture into a degumming tank, and reacting with phospholipase; wherein the washing water is purified water.

The impurity-removed swill-cooked dirty oil is obtained by filtering and centrifuging the swill-cooked dirty oil; wherein, the filtration is performed by adopting an inorganic filter membrane.

The inorganic filter membrane is a ceramic membrane or an alumina membrane; the acid is citric acid, phosphoric acid or oxalic acid; the phospholipase is phosphomonoesterase, phosphodiesterase, apyrase, pyrophosphatase or metaphosphatase.

Further, the following steps are carried out:

(1) removing impurities in the illegal cooking oil through operations such as filtration, centrifugation and the like;

(2) heating the purified illegal cooking oil to 50-70 ℃ at a stirring speed of 70-100r/min, uniformly adding acid with the weight of 0.05-0.2% of the weight of the crude oil into the crude oil in a spraying mode, keeping the temperature at 50-70 ℃ after the acid is added, and stirring for 15-30 min;

(3) adding washing water into the illegal cooking oil treated in the step (2), and injecting the washing water and the illegal cooking oil into a dynamic reactor at a speed of 0.1-1L/min to obtain an oil-water mixed solution which is injected into a reaction tank;

(4) adding the phospholipase into the mixed solution treated in the step (3) in a spraying manner, and stirring at constant temperature for reaction for 1-4 h;

(5) and (4) sending the mixed liquid treated in the step (4) to a centrifugal machine for centrifugal separation, wherein the rotating speed of the centrifugal separation is 3000-5000rpm, and the constant speed time is 15-25 min.

The utility model provides a ditch oil superelevation device that comes unstuck in succession, the device is including degumming tank (7), ditch oil tank (1), acid tank (2), enzyme jar (3), agitator (8) and dynamic reaction ware (5), degumming tank (7) bottom is equipped with and is equipped with agitator (8) in external heater (16), through the pipeline with acid tank (2) and enzyme jar (3) through connection in degumming tank (7) both sides, ditch oil tank (1) and centrifugal device (6) are respectively through pipeline and degumming tank (7) intercommunication, and flow controller (9) and dynamic reaction ware (5) loop through the pipeline and link to each other, and the other end of flow controller (9) and dynamic reaction ware (5) links to each other with degumming tank (7) through the pipeline respectively.

The flow controller (9) is connected with the water tank (4).

Valves are respectively arranged on pipelines connected with the swill-cooked dirty oil tank (1), the acid tank (2), the enzyme tank (3), the centrifugal device (6), the flow controller (9) and the degumming tank (7), and valves are arranged on pipelines between the flow controller (9) and the water tank (4).

And a plurality of spray heads are arranged on a pipeline which penetrates through the degumming tank (7) and is connected with the acid tank (2) and the enzyme tank (3).

The invention has the advantages that:

at present, the degumming efficiency of grease in China is general, and the cost is high; wherein, only phosphoric acid is adopted to convert non-hydrated phospholipid in the illegal cooking oil into hydrated phospholipid, and the degumming rate is very low; while only water degumming can only expand and agglomerate hydrated phospholipid to separate out and remove the hydrated phospholipid from the oil, non-hydrated phospholipid remains in the oil, and enzymatic degumming has longer reaction time but more complete degumming. The method for degumming the grease is suitable for waste oil such as hogwash oil, fried old oil, residual oil of dining halls and the like.

The method improves the traditional hydration degumming and acidification degumming enzymatic degumming, can realize degumming by combining acid-water-enzyme, can remove hydrated phospholipid and non-hydrated phospholipid in the illegal cooking oil, has more perfect degumming effect, improves the degumming effect, can reduce the phosphorus content of the degummed oil to below 10mg/kg, completely meets the process requirement of producing biodiesel, has the advantages of environmental protection, low cost, less investment and the like, and meets the degumming production of the illegal cooking oil required by the modern large-scale production of the biodiesel; the invention has simple process flow and is easy to realize industrial scale production. The industrial calcium carbonate can be used for neutralizing the production wastewater, so that the phosphoric acid is crystallized, salified and separated out, and recycled as the phosphate fertilizer.

Drawings

FIG. 1 is a diagram of the method and apparatus of the present invention; wherein: 1. a trench oil tank, 2, an acid tank, 3, an enzyme tank, 4, a water tank, 5, a dynamic reactor, 6, a centrifugal device, 7, a degumming tank, 8, a stirrer, 9, a flow controller, 10-15, a valve, 16 and a heater.

Detailed Description

The method and the post-treatment process for the phosphoric acid-water combined degumming of illegal cooking oil according to the present invention will be further described with reference to the following examples.

The ultrahigh continuous degumming technology and equipment for the illegal cooking oil provided by the invention not only can realize industrialization easily due to ultrahigh continuous degumming, but also have more remarkable degumming effect due to an acid-water-enzyme combined degumming method, and simultaneously, calcium carbonate can be added into water in the wastewater after degumming to crystallize and separate out phosphate and recycle the phosphate for use as a phosphate fertilizer.