CN104140888B - A kind of low temperature dewatering method of tea oil - Google Patents
A kind of low temperature dewatering method of tea oil Download PDFInfo
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- CN104140888B CN104140888B CN201410408129.6A CN201410408129A CN104140888B CN 104140888 B CN104140888 B CN 104140888B CN 201410408129 A CN201410408129 A CN 201410408129A CN 104140888 B CN104140888 B CN 104140888B
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Abstract
The invention provides a kind of low temperature dewatering method of tea oil.Specifically comprise the steps: the preparation of (1) mol sieve beds: get molecular sieve, be placed on bed grid distributor; (2) molecular sieve fluid bed auxiliary negative pressure low temperature dewatering: tea oil to be drained off is put into oil tank, by oil pump input heater heats to 40-50 DEG C, input molecular sieve fluid bed bed again, open negative pressure pump simultaneously, carry out molecular sieve fluid bed auxiliary negative pressure processed 1.5-2.0 hour, namely the fluid collected in molecular sieve fluid bed bed obtains dehydration tea oil.The present invention is by molecular sieve fluid bed auxiliary negative pressure low temperature dewatering; not only dewatering efficiency is high, equipment is simple, cost is low, easy handling; and the thermo-sensitivity physiologically active things such as tea oil Linoleic acid, tea-polyphenol, vitamin-E can be protected not to be destroyed, keep interior quality and the health-care effect of tea oil.
Description
Technical field
The invention belongs to fats and oils processing field, be specifically related to a kind of low temperature dewatering method of tea oil.
Background technology
In course of oil processing, squeezing and water washing operations all can produce certain moisture.The existence of moisture can shorten the quality guaranteed period of grease, reduces the detrimentally affects such as the transparency of finished grease.Therefore, these moisture must be managed to dispose.At present, be adopt machine dehydration except the method for moisture in degrease mainly contains two kinds: one, two is adopt dehydration by evaporation.Machine dehydration is the difference utilizing profit density, makes the oil-water mixture of high speed rotating in water extracter, produce different centrifugal force, thus oil is separated with water; But existing water extracter complex structure, maintenance difficult, production cost is high, and it is of low quality to dewater.Dehydration by evaporation makes moisture vaporization in grease by heating or heating under vacuum and oil and water are opened; It not only consumes energy, time-consuming, effort, and long-time processed can destroy the active substance in grease, reduces quality product.
Tea oil (as camellia seed oil, tea-seed wet goods) is the plant of theaceae such as tea seed, tea-seed seed through shelling → squeeze → filter → come unstuck → operation such as alkali refining → washing → dehydration → decolouring → deodorization and the edible xylophyta that obtains is oily.Tea oil is rich in monounsaturated fatty acids, and its lipid acid proportion of composing is that best sweet oil is similar to universally acknowledged, is called as " east sweet oil ", have reducing blood-fat, anti-oxidant, regulate the health-care effecies such as immunity of organisms.Tea oil is also containing more V
e, V
d, V
k, the physiologically active substance such as tea-polyphenol and carotenoid.Tea seed oil is formally approved as new resource food in December, 2009 " Ministry of Health of the People's Republic of China's No. 18 bulletin in 2009 ", and tea seed is the edible oil that on the south China the Changjiang river, oil tea plantation Area Inhabitants is traditional.Along with the sustainable development of China's economy, improving constantly of living standards of the people, tea oil, as healthy edible plant oil, will have the increasing market requirement.
In order to effectively preserve various nutritive ingredient in tea oil and natural flavour mountaineous, cold pressing process is moved towards in the production of tea oil, but containing the moisture of 0.3 ~ 0.5% in cold press crude oil; Water washing operations in crude oil refining process also can moisturize content.Adopt traditional dewatering namely to be dewatered or high-temperature vacuum drying and dehydrating by whizzer machine, or product moisture content is difficult to up to standard, or nutrition and the fragrance thereof of tea oil can be destroyed.For overcoming the deficiency of conventional dehydration method, people attempt low temperature dewatering, the patent of invention being CN102766525A as publication number passes through low temperature dewatering, namely be heated to 50 ~ 60 DEG C and constant temperature and leave standstill 60 ~ 72 hours, be separated and remove moisture in tea-seed crude oil and impurity, then 55-60 DEG C, low temperature dewatering 2-3h makes moisture content below 0.1% under 720mmHg vacuum.But this dewatering consuming time still can cause a large amount of loss to functional factors such as the tocopherol in tea oil, sterol, squalenes, affects interior quality and the health-care effect of tea oil.Therefore, provide that a kind of cost is low, technology is simple, easy handling, efficient tea oil dewatering fast, undoubtedly to ensureing the interior quality of tea oil and health-care effect, meet the market demand of tea oil and have important practical significance.
Summary of the invention
In order to solve the defect that dewatering in existing tea oil production technology exists, the invention provides a kind of low temperature dewatering method of tea oil of economically feasible, easy handling, maintenance tea oil high-quality.
A kind of low temperature dewatering concrete operation step of tea oil is as follows:
(1) preparation of mol sieve beds: get molecular sieve, is placed on bed grid distributor;
(2) molecular sieve fluid bed auxiliary negative pressure low temperature dewatering: tea oil to be drained off is put into oil tank, by oil pump input heater heats to 40-50 DEG C, input molecular sieve fluid bed bed again, open negative pressure pump simultaneously, carry out molecular sieve fluid bed auxiliary negative pressure processed 1.5-2.0 hour, namely the fluid collected in molecular sieve fluid bed bed obtains dehydration tea oil.Moisture content≤0.1% of dehydration tea oil.
Compared with prior art, tool has the following advantages the inventive method:
(1) the present invention is by molecular sieve fluid bed auxiliary negative pressure low temperature dewatering, and dewatering efficiency is high.Molecular sieve is the silico-aluminate compound with cubic(al)grating connected to form by oxo bridge primarily of sial, has the functional effect such as screening and high water suction.Molecular sieve is uniquely available high-temperature adsorbing agent, the moisture of molecular sieve still adsorbable 15% own wt when 100 DEG C and 1.3% relative humidity, larger than the water regain of activated alumina under the same terms 10 times, larger than silica gel more than 20 times.Current molecular sieve widely uses in the industry such as chemical industry, oil, Sweet natural gas.In fluidized-bed tower, the solid materialss such as molecular sieve are deposited on the grid distributor of fluidized-bed tower, form the immovable bed that one deck is called " bed ", fluid is introduced container bottom continuously with certain speed, make it to flow uniformly across grid distributor upwards to flow to contact with solid materials and mass transfer, heat transfer etc. occur and act on and make solid materials be suspension, be called fluidization by means of this state with the technology completing certain process.Fluidization has operation serialization, mass transfer velocity contacts the advantages such as abundant with liquid-solid phase soon.The present invention's dewatering time compared with the method for CN102766525A shortens 1.0-1.5 hour;
(2) the present invention adopts molecular sieve fluid bed series connection negative pressure pump low temperature dewatering, and energy consumption is low, and equipment is simple, and cost is low, easy to use;
(3) the present invention is by molecular sieve fluid bed auxiliary negative pressure low temperature dewatering, and the physiologically active such as tea-polyphenol, vitamin-E thing in tea oil can be protected not to be destroyed, and keeps interior quality and the health-care effect of tea oil.
Accompanying drawing explanation
Fig. 1 is the low temperature dewatering equipment composition wiring diagram of tea oil of the present invention.
Sequence number in Fig. 1: oil tank 1, oil pump 2, first variable valve 3, spinner-type flowmeter 4, primary heater 5, second variable valve 6, oil-in thermometer 7, outlet molecular sieve 8, bed mouth thermometer 9, molecular sieve 10, molecular sieve entrance 11, molecular sieve fluid bed tower 12, first T-valve 13, oily holding tank 14, prolong 15, condensation water collection bottle 16, second T-valve 17, negative pressure pump 18, secondary heater 19.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
embodiment 1
See Fig. 1, the low temperature dewatering concrete operation step of tea oil is as follows:
Step 1: the preparation of mol sieve beds: get 4A molecular sieve, puts into the grid distributor of molecular sieve fluid bed tower 12 from molecular sieve entrance 11;
Step 2: molecular sieve fluid bed auxiliary negative pressure low temperature dewatering: the oil-tea camellia seed crude oil 50L of low temperature pressing to be drained off is put into oil tank 1, regulate the first variable valve 3, by oil pump 2 and spinner-type flowmeter 4, the oil input primary heater 5 in oil tank 1 is heated to oil-in thermometer 7 and shows 45 DEG C, regulate the first variable valve 3 and the second variable valve 6, open secondary heater 19, the apparent fluidisation liquid speed making the oil in molecular sieve fluid bed tower 12 is 1.5mm/s, molecular sieve 10 bed aspect ratio is 10 ︰ 1, the bed mouth thermometer 9 of molecular sieve 10 bed shows 70 DEG C, then negative pressure pump 18 is opened, regulate the second T-valve 17, be evacuated to negative pressure for-0.09MPa, carry out molecular sieve fluid bed auxiliary negative pressure processed 1.8 hours, collect fluid storage in molecular sieve fluid bed bed in oily holding tank 14, obtain the dehydration oil-tea camellia seed crude oil that water content is 0.1%,
Water vapor is collected in condensation water collection bottle 18 by prolong 15; The underproof oil of water content returns in oil tank 1 by the first T-valve 13; Molecular sieve 10 absorb water saturated after discharge from outlet molecular sieve 8 grid distributor putting into molecular sieve fluid bed tower 12 from molecular sieve entrance 11 after regeneration and reuse.
embodiment 2:
Step 1: the preparation of mol sieve beds: get 5A molecular sieve, puts into the grid distributor of molecular sieve fluid bed tower 12 from molecular sieve entrance 11;
Step 2: molecular sieve fluid bed auxiliary negative pressure low temperature dewatering: tea seed to be drained off is washed oily 30L and puts into oil tank 1, regulate the first variable valve 3, by oil pump 2 and spinner-type flowmeter 4, the oil input primary heater 5 in oil tank 1 is heated to oil-in thermometer 7 and shows 45 DEG C, regulate the first variable valve 3 and the second variable valve 6, open secondary heater 19, the apparent fluidisation liquid speed making the oil in molecular sieve fluid bed tower 12 is 1.0mm/s, molecular sieve 10 bed aspect ratio is 8 ︰ 1, the bed mouth thermometer 9 of molecular sieve 10 bed shows 60 DEG C, then negative pressure pump 18 is opened, regulate the second T-valve 17, be evacuated to negative pressure for-0.09MPa, carry out molecular sieve fluid bed auxiliary negative pressure processed 1.9 hours, collect fluid storage in molecular sieve fluid bed bed in oily holding tank 14, obtain the dehydration tea seed that water content is 0.09%,
Water vapor is collected in condensation water collection bottle 18 by prolong 15; The underproof oil of water content returns in oil tank 1 by the first T-valve 13; Molecular sieve 10 absorb water saturated after discharge from outlet molecular sieve 8 grid distributor putting into molecular sieve fluid bed tower 12 from molecular sieve entrance 11 after regeneration and reuse.
embodiment 3:
Step 1: the preparation of mol sieve beds: get 4A molecular sieve, puts into the grid distributor of molecular sieve fluid bed tower 12 from molecular sieve entrance 11;
Step 2: molecular sieve fluid bed auxiliary negative pressure low temperature dewatering: the tea-seed crude oil 30L of low temperature pressing to be drained off is put into oil tank 1, regulate the first variable valve 3, by oil pump 2 and spinner-type flowmeter 4, the oil input primary heater 5 in oil tank 1 is heated to oil-in thermometer 7 and shows 45 DEG C, regulate the first variable valve 3 and the second variable valve 6, open secondary heater 19, the apparent fluidisation liquid speed making the oil in molecular sieve fluid bed tower 12 is 1.2mm/s, molecular sieve 10 bed aspect ratio is 5 ︰ 1, the bed mouth thermometer 9 of molecular sieve 10 bed shows 65 DEG C, then negative pressure pump 18 is opened, regulate the second T-valve 17, be evacuated to negative pressure for-0.09MPa, carry out molecular sieve fluid bed auxiliary negative pressure processed 1.5 hours, collect fluid storage in molecular sieve fluid bed bed in oily holding tank 14, obtain the dehydration tea-seed crude oil that water content is 0.09%,
Water vapor is collected in condensation water collection bottle 18 by prolong 15; The underproof oil of water content returns in oil tank 1 by the first T-valve 13; Molecular sieve 10 absorb water saturated after discharge from outlet molecular sieve 8 grid distributor putting into molecular sieve fluid bed tower 12 from molecular sieve entrance 11 after regeneration and reuse.
embodiment 4:
Step 1: the preparation of mol sieve beds: get 5A molecular sieve, puts into the grid distributor of molecular sieve fluid bed tower 12 from molecular sieve entrance 11;
Step 2: molecular sieve fluid bed auxiliary negative pressure low temperature dewatering: tea-seed to be drained off is washed oily 50L and puts into oil tank 1, regulate the first variable valve 3, by oil pump 2 and spinner-type flowmeter 4, the oil input primary heater 5 in oil tank 1 is heated to oil-in thermometer 7 and shows 45 DEG C, regulate the first variable valve 3 and the second variable valve 6, open secondary heater 19, the apparent fluidisation liquid speed making the oil in molecular sieve fluid bed tower 12 is 1.3mm/s, molecular sieve 10 bed aspect ratio is 6 ︰ 1, the bed mouth thermometer 9 of molecular sieve 10 bed shows 65 DEG C, then negative pressure pump 18 is opened, regulate the second T-valve 17, be evacuated to negative pressure for-0.09MPa, carry out molecular sieve fluid bed auxiliary negative pressure processed 2.0 hours, collect fluid storage in molecular sieve fluid bed bed in oily holding tank 14, obtain the dehydration tea seed oil that water content is 0.1%,
Water vapor is collected in condensation water collection bottle 18 by prolong 15; The underproof oil of water content returns in oil tank 1 by the first T-valve 13; Molecular sieve 10 absorb water saturated after discharge from outlet molecular sieve 8 grid distributor putting into molecular sieve fluid bed tower 12 from molecular sieve entrance 11 after regeneration and reuse.
Claims (3)
1. a low temperature dewatering method for tea oil, is characterized in that: concrete operation step is as follows:
(1) preparation of mol sieve beds: get molecular sieve, is placed on bed grid distributor;
(2) molecular sieve fluid bed auxiliary negative pressure low temperature dewatering: tea oil to be drained off is put into oil tank, by oil pump input heater heats to 40-50 DEG C, input molecular sieve fluid bed bed again, open negative pressure pump simultaneously, carry out molecular sieve fluid bed auxiliary negative pressure processed 1.5-2.0 hour, namely the fluid collected in molecular sieve fluid bed bed obtains dehydration tea oil; Moisture content≤0.1% of dehydration tea oil;
Molecular sieve described in step (1) is 4A molecular sieve or 5A molecular sieve;
Negative pressure Wei – 0.08～– 0.10MPa described in step (2).
2. the low temperature dewatering method of a kind of tea oil according to claim 1, it is characterized in that: the tea oil to be drained off described in step (2) is the tea-seed crude oil of low temperature pressing, or the tea-seed washing oil of low temperature pressing, or the oil-tea camellia seed crude oil of low temperature pressing, or the tea seed washing oil of low temperature pressing.
3. the low temperature dewatering method of a kind of tea oil according to claim 1, it is characterized in that: the molecular sieve fluid bed bed aspect ratio described in step (2) is 5 ~ 10 ︰ 1, bed temperature is 60 ~ 70 DEG C, and apparent fluidisation liquid speed is 1.0 ~ 1.5mm/s.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1667105A (en) * | 2005-03-25 | 2005-09-14 | 朱少新 | Process for processing tea seed oil |
| CN1827754A (en) * | 2006-03-27 | 2006-09-06 | 郴州邦尔泰苏仙油脂有限公司 | Physical low-temperature cold-squeezing process for tea-seed oil |
| CN102766525A (en) * | 2012-07-17 | 2012-11-07 | 安徽省华银茶油有限公司 | Method for squeezing tea seed oil at normal temperature |
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2014
- 2014-08-19 CN CN201410408129.6A patent/CN104140888B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1667105A (en) * | 2005-03-25 | 2005-09-14 | 朱少新 | Process for processing tea seed oil |
| CN1827754A (en) * | 2006-03-27 | 2006-09-06 | 郴州邦尔泰苏仙油脂有限公司 | Physical low-temperature cold-squeezing process for tea-seed oil |
| CN102766525A (en) * | 2012-07-17 | 2012-11-07 | 安徽省华银茶油有限公司 | Method for squeezing tea seed oil at normal temperature |
Non-Patent Citations (1)
| Title |
|---|
| 分子筛脱水技术简介;吉红军等;《山东化工》;20131231;第12卷;第26-28页 * |
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