CN215712875U - Deacidification system of kitchen waste grease - Google Patents
Deacidification system of kitchen waste grease Download PDFInfo
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- CN215712875U CN215712875U CN202122314505.3U CN202122314505U CN215712875U CN 215712875 U CN215712875 U CN 215712875U CN 202122314505 U CN202122314505 U CN 202122314505U CN 215712875 U CN215712875 U CN 215712875U
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- China
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- communicated
- distiller
- oil tank
- oil
- heat exchanger
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 38
- 239000004519 grease Substances 0.000 title claims abstract description 20
- 238000000605 extraction Methods 0.000 claims abstract description 37
- 238000009835 boiling Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 15
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 7
- 239000000194 fatty acid Substances 0.000 claims description 7
- 229930195729 fatty acid Natural products 0.000 claims description 7
- 150000004665 fatty acids Chemical class 0.000 claims description 7
- 239000002253 acid Substances 0.000 abstract description 14
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 62
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 21
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 18
- 239000003925 fat Substances 0.000 description 5
- 235000021588 free fatty acids Nutrition 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 125000004185 ester group Chemical group 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003225 biodiesel Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000011973 solid acid Substances 0.000 description 1
Images
Classifications
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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)
Abstract
The utility model discloses a deacidification system for kitchen waste oil, and belongs to the technical field of deacidification of waste oil. The deacidification system for the kitchen waste oil comprises a first oil tank, a heat exchanger, an evaporator, a first distiller, a second distiller, a first extraction pump and a second oil tank; a discharge hole of the first oil tank is communicated with the heat exchanger, and the first oil tank is used for storing kitchen waste grease; a discharge port of the heat exchanger is communicated with an evaporator, and the evaporator is used for removing low-boiling substances in the kitchen waste grease; the discharge port of the evaporator is communicated with the first distiller, the discharge port of the first distiller is communicated with the second distiller, the second distiller is communicated with the feed end of the first extraction pump, the discharge end of the first extraction pump is communicated with the heat exchanger, the feed port of the second oil tank is communicated with the heat exchanger, and the second oil tank is used for collecting deacidified oil. The acid value of the deacidified oil can be reduced to below 1 while the heat recycling is realized.
Description
Technical Field
The utility model relates to the technical field of deacidification of waste oil, in particular to a deacidification system for kitchen waste oil.
Background
For kitchen waste oil and fat with acid value between 10 and 15(KOH)/(mg/g), namely kitchen waste oil and fat with fatty acid content between 5 and 7.5 percent, the prior equipment reduces the acid value to be below 3(KOH)/(mg/g) by esterification, for example, CN102134528A discloses that high-acid-value oil and fat are subjected to liquid-gas esterification reaction in countercurrent of a second-stage solid acid catalyst section in a fluidized state, unreacted gaseous methanol leaves from the top of a reaction tower and enters a methanol fractionating tower, and the high-acid-value oil and fat are subjected to liquid-gas esterification reaction to obtain the acid value of less than or equal to 3mg-1The low acid value grease enters the bottom of the reaction tower and then enters the ester exchange process, and the process has the problem that a large amount of grease is in ineffective circulation, so that new equipment is required to be provided for reducing the acid value of the kitchen waste grease with the acid value of 10-15(KOH)/(mg/g) to below 1.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the technical defects, provides a deacidification system for kitchen waste oil, and solves the technical problem that the acid value of the kitchen waste oil with the acid value of 10-15(KOH)/(mg/g) is difficult to be reduced to below 1 in the prior art.
In order to achieve the technical purpose, the technical scheme of the utility model provides a deacidification system for kitchen waste grease.
A deacidification system for kitchen waste oil comprises a first oil tank, a heat exchanger, an evaporator, a first distiller, a second distiller, a first extraction pump and a second oil tank; a discharge hole of the first oil tank is communicated with the heat exchanger, and the first oil tank is used for storing kitchen waste grease; the discharge hole of the heat exchanger is communicated with the evaporator, and the evaporator is used for removing low-boiling substances in the kitchen waste grease; the discharge hole of the evaporator is communicated with the first distiller, the discharge hole of the first distiller is communicated with the second distiller, the second distiller is communicated with the feed end of the first extraction pump, the discharge end of the first extraction pump is communicated with the heat exchanger, the feed inlet of the second oil tank is communicated with the heat exchanger, and the second oil tank is used for collecting deacidified oil.
Further, still include first vacuum unit, first vacuum unit with the evaporimeter communicates.
Further, a second vacuum unit is included, the second vacuum unit being in communication with the first still.
Further, a third vacuum unit is included, the third vacuum unit being in communication with the second still.
Further, the system also comprises a first cold trap which is communicated with the first distiller and the second vacuum unit.
Further, a second cold trap is included, the second cold trap being in communication with the second still and the third vacuum train.
Further, the device also comprises a third oil tank, wherein the feed inlet of the third oil tank is respectively communicated with the first distiller and the second distiller, and the third oil tank is used for collecting fatty acid.
The device further comprises a second extraction pump, wherein the feed end of the second extraction pump is communicated with the first oil tank, and the discharge end of the second extraction pump is communicated with the heat exchanger.
The feed end of the third extraction pump is communicated with the evaporator, and the discharge end of the third extraction pump is communicated with the first distiller.
The feeding end of the fourth extraction pump is communicated with the first distiller, and the discharging end of the fourth extraction pump is communicated with the second distiller.
Compared with the prior art, the utility model has the beneficial effects that: the kitchen waste oil in the first oil tank enters a heat exchanger, the temperature is raised primarily by the heat exchanger, then the kitchen waste oil enters an evaporator to be continuously raised to remove low-boiling substances, the kitchen waste oil from which the low-boiling substances are removed enters a first distiller, fatty acid of the kitchen waste oil is primarily removed in the first distiller to obtain primary deacidified oil, then the primary deacidified oil enters a second distiller to continuously remove free fatty acid to obtain secondary deacidified oil, the secondary deacidified oil is pumped into the heat exchanger through a first extraction pump to exchange heat with the kitchen waste oil, heat is transferred to the kitchen waste oil, and then the kitchen waste oil enters a second oil tank.
Drawings
FIG. 1 is a schematic view showing the configuration of a deacidification system for kitchen waste fats and oils according to example 1 of the present invention.
Description of reference numerals: 1. a first oil tank; 2. a heat exchanger; 3. an evaporator; 4. a first distiller; 5. a second distiller; 6. a first production pump; 7. a second oil tank; 8. a first vacuum unit; 9. a second vacuum unit; 10. a third vacuum unit; 11. a first cold trap; 12. a second cold trap; 13. a third oil tank; 14. a second production pump; 15. a third production pump; 16. a fourth production pump; 17. a fifth production pump; 18. and a sixth extraction pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Example 1
With reference to fig. 1, the present embodiment provides a kitchen waste grease deacidification system, which includes a first oil tank 1, a heat exchanger 2, an evaporator 3, a first distiller 4, a second distiller 5, a first extraction pump 6, and a second oil tank 7; a discharge hole of the first oil tank 1 is communicated with the heat exchanger 2, and the first oil tank 1 is used for storing kitchen waste grease; the discharge port of the heat exchanger 2 is communicated with the evaporator 3, the discharge port of the evaporator 3 is communicated with the first distiller 4, the discharge port of the first distiller 4 is communicated with the second distiller 5, the second distiller 5 is communicated with the feed end of the first extraction pump 6, the discharge end of the first extraction pump 6 is communicated with the heat exchanger 2, the feed port of the second oil tank 7 is communicated with the heat exchanger 2, and the second oil tank 7 is used for collecting deacidified oil.
On the basis of the above embodiment, the present embodiment further includes a first vacuum unit 8, and the first vacuum unit 8 is communicated with the evaporator 3. The first vacuum unit 8 is used to adjust the vacuum degree in the evaporator 3 to about 2000 Pa. Further, the evaporator 3 is a wiped film evaporator.
On the basis of the above embodiment, the present embodiment further includes a second vacuum unit 9, and the second vacuum unit 9 is communicated with the first distiller 4. The second vacuum unit 9 is used to ensure that the vacuum degree in the first distiller 4 is about 30 Pa.
On the basis of the above embodiment, the present embodiment further includes a third vacuum unit 10, and the third vacuum unit 10 is communicated with the second distiller 5. The third vacuum unit 10 is used to ensure that the vacuum degree in the second distiller 5 is about 5 Pa.
On the basis of the above embodiment, the present embodiment further includes a first cold trap 11, and the first cold trap 11 is communicated with the first distiller 4 and the second vacuum unit 9.
On the basis of the above embodiment, the present embodiment further includes a second cold trap 12, and the second cold trap 12 is communicated with the second distiller 5 and the third vacuum unit 10.
On the basis of the above embodiment, the present embodiment further includes a third oil tank 13, feed ports of the third oil tank 13 are respectively communicated with the first distiller 4 and the second distiller 5, and the third oil tank 13 is used for collecting fatty acid.
On the basis of the above embodiment, the present embodiment further includes a second extraction pump 14, a feed end of the second extraction pump 14 is communicated with the first oil tank 1, and a discharge end of the second extraction pump 14 is communicated with the heat exchanger 2. The second extraction pump 14 is used for pumping the kitchen waste oil to be treated into a heat exchanger for heat exchange, and the heat exchanger raises the temperature of the kitchen waste oil to be treated to about 150 ℃. Further, the heat exchanger is preferably a spiral plate heat exchanger.
On the basis of the above embodiment, the present embodiment further includes a third extraction pump 15, a feed end of the third extraction pump 15 is communicated with the evaporator 3, and a discharge end of the third extraction pump 15 is communicated with the first distiller 4.
On the basis of the above embodiment, the present embodiment further includes a fourth extraction pump 16, a feed end of the fourth extraction pump 16 is communicated with the first distiller 4, and a discharge end of the fourth extraction pump 16 is communicated with the second distiller 5.
On the basis of the above embodiment, the present embodiment further includes a fifth extraction pump 17, a feed end of the fifth extraction pump 17 is communicated with the first distiller 4, and a discharge end of the fifth extraction pump 17 is communicated with the third oil tank 13.
On the basis of the above embodiment, the present embodiment further includes a sixth extraction pump 18, a feed end of the sixth extraction pump 18 is communicated with the second distiller 5, and a discharge end of the sixth extraction pump 18 is communicated with the third oil tank 13.
The first production pump 6, the second production pump 14, the third production pump 15, the fourth production pump 16, the fifth production pump 17, and the sixth production pump 18 in this embodiment are high vacuum gear pumps.
On the basis of the above-described embodiment, the surfaces of the first distiller 4 and the second distiller 5 in this embodiment are provided with steam jackets (not shown but well understood).
The working process of the system of the embodiment is as follows:
the kitchen waste grease and deacidified oil are subjected to heat exchange through a spiral plate type heat exchanger to raise the temperature of the kitchen waste grease to 150 ℃, and then enter a 2000Pa scraper film evaporator through a high vacuum gear pump, and are continuously heated to 160 ℃ under the heating of a 1.0 MPa steam jacket, and low-boiling substances are removed. The kitchen waste grease with low-boiling substances removed at 160 ℃ enters a first distiller 4 with the pressure of about 30Pa through a high vacuum gear pump, the temperature of the system materials is maintained at 160 ℃ under the heating of a 1.0 MPa steam jacket, free fatty acid is removed under the high vacuum condition of 30Pa, the free fatty acid is extracted by the high vacuum gear pump and enters a third oil tank 13, the oil subjected to preliminary deacidification is pumped into a second distiller 5 through the high vacuum gear pump, the oil subjected to preliminary deacidification at 160 ℃ enters a second distiller 5 with the pressure of about 5Pa through the high vacuum gear pump, the temperature of the system materials is maintained at 160 ℃ under the heating of the 1.0 MPa steam jacket, and the free fatty acid is continuously removed under the high vacuum condition of 5 Pa. Free fatty acid is extracted by the high vacuum gear pump and enters the third oil tank 13, and deacidified oil is pumped into the spiral plate type heat exchanger through the high vacuum gear pump to exchange heat with the kitchen waste grease.
The deacidified oil treated by the deacidification system provided by the embodiment has an acid value less than 1(KOH)/(mg/g), so that the subsequent ester exchange process is facilitated to save the amount of an alkali catalyst, the methanol consumption of the biodiesel is reduced, the production efficiency is improved, and the production energy consumption is saved.
The energy consumption of treating each ton of kitchen waste grease is as follows: the specific heat of the kitchen waste grease is calculated by 0.6, the evaporation latent heat of the fatty acid is calculated by 80, and the average acid value is calculated by 15;
the temperature rise requires 1000x0.6x10 to 6000 kcal/ton of heat energy.
The evaporation of fatty acid requires 1000 × 0.075 × 80 — 6000 kcal/ton of heat energy.
12000 kcal/ton in total, and 12000/550-21.8 kg/ton of steam is needed.
The steam price is 200 yuan/ton, and the energy consumption cost is 200x0.0218 yuan/ton and 4.36 yuan/ton.
The methanol esterification process of the kitchen waste oil is omitted, the methanol consumption of the biodiesel is reduced from 14% to 12%, about 2% is saved, and the methanol is saved by 2500 yuan per ton and 50 yuan per ton.
The acid value of deacidified oil is lower than that of esterified oil, the dosage of ester exchange catalyst is reduced from 0.7% to 0.5%, potassium hydroxide catalyst is saved by 0.2%, potassium hydroxide is saved by 7000 yuan per ton, and 14 yuan per ton is saved.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A deacidification system for kitchen waste oil is characterized by comprising a first oil tank, a heat exchanger, an evaporator, a first distiller, a second distiller, a first extraction pump and a second oil tank; a discharge hole of the first oil tank is communicated with the heat exchanger, and the first oil tank is used for storing kitchen waste grease; the discharge hole of the heat exchanger is communicated with the evaporator, and the evaporator is used for removing low-boiling substances in the kitchen waste grease; the discharge hole of the evaporator is communicated with the first distiller, the discharge hole of the first distiller is communicated with the second distiller, the second distiller is communicated with the feed end of the first extraction pump, and the discharge end of the first extraction pump is communicated with the heat exchanger; and a feed inlet of the second oil tank is communicated with the heat exchanger, and the second oil tank is used for collecting deacidified oil.
2. The deacidification system according to claim 1, further comprising a first vacuum aggregate in communication with the evaporator.
3. The deacidification system in accordance with claim 1, further comprising a second vacuum train in communication with the first still.
4. The deacidification system in accordance with claim 1, further comprising a third vacuum train in communication with the second still.
5. The deacidification system in accordance with claim 3, further comprising a first cold trap in communication with the first still and the second vacuum train.
6. The deacidification system according to claim 4, further comprising a second cold trap in communication with the second still and the third vacuum train.
7. The deacidification system according to claim 1, further comprising a third oil tank, feed inlets of the third oil tank being in communication with the first still and the second still, respectively, the third oil tank being for collecting fatty acids.
8. The deacidification system according to claim 1, further comprising a second production pump having a feed end in communication with the first oil tank and a discharge end in communication with the heat exchanger.
9. The deacidification system according to claim 1, further comprising a third production pump, a feed end of the third production pump being in communication with the evaporator, and a discharge end of the third production pump being in communication with the first still.
10. The deacidification system according to claim 1, further comprising a fourth production pump having a feed end in communication with the first still and a discharge end in communication with the second still.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122314505.3U CN215712875U (en) | 2021-09-23 | 2021-09-23 | Deacidification system of kitchen waste grease |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122314505.3U CN215712875U (en) | 2021-09-23 | 2021-09-23 | Deacidification system of kitchen waste grease |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215712875U true CN215712875U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122314505.3U Active CN215712875U (en) | 2021-09-23 | 2021-09-23 | Deacidification system of kitchen waste grease |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215712875U (en) |
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2021
- 2021-09-23 CN CN202122314505.3U patent/CN215712875U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 431600 Kaifa 2nd Road, Hanchuan economic and Technological Development Zone, Xiaogan City, Hubei Province Patentee after: Hubei Tianji Bioenergy Co.,Ltd. Country or region after: China Address before: 431600 Kaifa 2nd Road, Hanchuan economic and Technological Development Zone, Xiaogan City, Hubei Province Patentee before: HUBEI TIANJI NEW ENERGY LIMITED BY SHARE LTD. Country or region before: China |