CN107011121B - Processing apparatus of biodiesel by-product crude glycerine - Google Patents
Processing apparatus of biodiesel by-product crude glycerine Download PDFInfo
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- CN107011121B CN107011121B CN201710384215.1A CN201710384215A CN107011121B CN 107011121 B CN107011121 B CN 107011121B CN 201710384215 A CN201710384215 A CN 201710384215A CN 107011121 B CN107011121 B CN 107011121B
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/86—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by liquid-liquid treatment
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/88—Separation; Purification; Use of additives, e.g. for stabilisation by treatment giving rise to a chemical modification of at least one compound
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Abstract
The invention discloses a treatment device for biodiesel byproduct crude glycerol, which comprises a heat exchanger, a glass lining kettle, a precipitation tank, a three-phase centrifuge, a receiving tank, an adjusting kettle, a pump, a valve and a pipeline, wherein the glass lining kettle is arranged in the heat exchanger; the inlet of the heat exchanger is provided with a valve and a pump, and the outlet of the heat exchanger is connected to the inlet of the first-stage glass lining kettle; the outlet of the glass lining kettle is connected to the inlet of the precipitation tank through a pump and a valve; the outlet of the settling tank is divided into two paths after being connected with a valve and a pump, one path is connected with the second-stage glass lining kettle, and the other path is connected with a biodiesel production system; the outlet of the second-stage glass lining kettle is connected with a three-phase centrifuge after being connected with a pump; the three-phase centrifuge is provided with two outlets of a heavy phase and a light phase and respectively connected to respective receiving tanks; the outlet of the heavy phase receiving tank is connected to the adjusting kettle after being connected with the pump, and the outlet of the adjusting kettle is connected to the processed glycerol collecting tank through a pipeline. The processing apparatus of biodiesel by-product crude glycerine of this structure has application scope extensively, easy operation, degree of automation is high, handles advantage high-efficient reliable.
Description
Technical Field
The invention relates to biodiesel production equipment, in particular to a treatment device for biodiesel byproduct crude glycerol.
Background
The biodiesel byproduct crude glycerin contains more impurities, the glycerin content in the crude glycerin is about 65%, and the rest is fatty acid salt (soap), grease, fatty acid methyl ester (biodiesel), inorganic salt, water, pigment, organic matter and the like, and is viscous liquid at normal temperature, and the pH value is 9-12. The traditional crude glycerol treatment method is difficult to achieve effective treatment effect and mainly has the following defects: the method has the advantages that the application range is narrow, the method is relatively suitable for treating crude glycerin with the glycerin content of less than 30%, and if the glycerin content is high, the viscosity is high, and the flocculation effect is poor; secondly, in order to achieve the flocculation effect, the pH value needs to be strictly controlled and continuously adjusted, and meanwhile, a flocculating agent needs to be frequently added, so that the operation is troublesome; thirdly, filter pressing is carried out in an acid medium with PH3-4, so that equipment such as a filter press and the like are easily corroded; fourthly, the filter press is only suitable for liquid-solid two-phase separation and is not suitable for liquid-solid three-phase separation; fifthly, the filter press has small processing capacity and high labor intensity.
Disclosure of Invention
Aiming at the defects, the invention provides a treatment device for the biodiesel byproduct crude glycerol by combining the characteristics of the biodiesel byproduct crude glycerol.
The invention aims to provide a treatment device for biodiesel byproduct crude glycerol, which has the advantages of wide application range, simple operation, high automation degree, high efficiency and reliability in treatment.
In order to realize the purpose, the treatment device for the biodiesel byproduct crude glycerol comprises a heat exchanger, a glass lining kettle, a precipitation tank, a three-phase centrifuge, a receiving tank, an adjusting kettle, a gear pump, a polytetrafluoroethylene-lined pump, a cast steel stop valve, a polytetrafluoroethylene-lined stop valve and a pipeline; the inlet of the heat exchanger is connected with the cast steel stop valve and the gear pump through a pipeline, and the outlet of the heat exchanger is connected to the upper inlet of the first-stage glass lining kettle; the bottom discharge hole of the glass lining kettle is connected to the upper feed inlet of the settling tank by a pipeline after being connected with a polytetrafluoroethylene lining pump, and polytetrafluoroethylene lining stop valves are arranged at the inlet and the outlet of the pump; the bottom discharge port of the precipitation tank is connected with a polytetrafluoroethylene-lined stop valve and a polytetrafluoroethylene-lined pump through pipelines, and then is divided into two paths, wherein one path is connected with the secondary glass lining kettle, and the other path is connected to a biodiesel production system; the bottom discharge port of the second-stage glass lining kettle is connected to the inlet of a three-phase centrifuge after being connected with a gear pump through a pipeline, the inlet of the pump is provided with a polytetrafluoroethylene-lined stop valve, and the outlet of the pump is provided with a cast steel stop valve; the three-phase centrifuge is provided with two outlets of a heavy phase and a light phase and is respectively connected to the receiving grooves through pipelines; the bottom outlet of the heavy phase receiving tank is connected to the inlet of the regulating kettle after being connected with a gear pump through a pipeline, the inlet and the outlet of the pump are respectively provided with a cast steel stop valve, and the bottom outlet of the regulating kettle is connected to the treated glycerol collecting tank through a pipeline.
The heat exchanger is a steam heating heat exchanger and adopts one of a shell and tube type or a spiral plate type heat exchanger.
The first-stage glass lining kettle, the second-stage glass lining kettle and the adjusting kettle are respectively provided with a stirrer and a material inlet and a material outlet.
The heat exchanger adopts steam for heating, aims to heat the crude glycerine, improves the flowability of the crude glycerine, and is beneficial to complete acidification in the first-level glass lining kettle.
The first-stage glass lining kettle is mainly used for neutralizing alkaline crude glycerol by inorganic acid and converting fatty acid salt (soap) in the crude glycerol into fatty acid to destroy the emulsification state in the crude glycerol, so that the subsequent separation of an oil phase and a crude glycerol phase is facilitated; the second-stage glass lining kettle mainly uses sodium hydroxide solution to neutralize the acidic crude glycerol to neutrality so as to prevent corrosion to a subsequent three-phase centrifuge.
The settling tank is used for causing the crude glycerin therein to be separated into layers by settling, and the crude glycerin is usually separated into four layers in the settling tank.
The three-phase centrifuge is used for liquid-solid separation to separate out a slag layer mainly containing inorganic salt, wherein the heavy phase is crude glycerol, the light phase is flocculent suspended matters, and the heavy phase and the light phase respectively flow into respective receiving grooves from two outlets.
The adjusting kettle is mainly used for adjusting the pH of the crude glycerol to 11-12 by sodium hydroxide.
The main control point of the processing device of the biodiesel byproduct crude glycerin with the structure is the separation effect of the crude glycerin layering effect in the precipitation tank and the three-phase centrifuge, the precipitation tank and the three-phase centrifuge are key devices for crude glycerin processing, and the acidification of the crude glycerin in the first-level glass lining kettle is required to be completely used as a premise in order to achieve the crude glycerin layering effect in the precipitation tank. In general, the crude glycerol is divided into four layers in a precipitation tank, wherein the upper layer is a mixture of fatty acid, grease and biodiesel, the lower layer is a small amount of inorganic salt of the acidic crude glycerol, the middle layer close to the lower layer is the acidic crude glycerol, and the middle layer close to the upper layer is acidic flocculent suspended matters; if the oil layer is not well separated, the oil layer can enter a rear glass lining kettle, when sodium hydroxide solution is neutralized, part of grease can be converted into fatty acid salt (soap) with the property of a surfactant to form a grease and crude glycerin emulsifying system, and even if the oil and crude glycerin emulsifying system is separated by a three-phase centrifugal machine, the separation effect is not good, and the quality requirement after the crude glycerin treatment is directly influenced.
The treatment device for the biodiesel byproduct crude glycerol has the following beneficial effects:
1. can be applied to the treatment of crude glycerin with high and low content, and avoids the treatment defects of the traditional method.
2. The three-phase centrifuge device is adopted, so that the separation effect is good, the speed is high, and the processing capacity is high.
3. The flocculant is not needed, the operation is simplified, and the problem of flocculant treatment is reduced.
4. After the crude glycerol is completely acidified, the crude glycerol is settled by using a settling tank, so that the oil and the crude glycerol have good layering effect, and the treatment effect of the crude glycerol is improved.
5. The corrosion of equipment is reduced, the utilization rate of the equipment is improved, and the labor intensity is reduced.
Drawings
FIG. 1 is a schematic structural view of a treatment apparatus for biodiesel byproduct crude glycerol according to the present invention.
Reference numerals: the device comprises a heat exchanger 1, a glass lining kettle 2, a precipitation tank 3, a three-phase centrifuge 4, a receiving tank 5, an adjusting kettle 6, a gear pump 7, a polytetrafluoroethylene-lined pump 8, a cast steel stop valve 9 and a polytetrafluoroethylene-lined stop valve 10.
Detailed Description
The following describes the processing apparatus for biodiesel by-product crude glycerin according to the present invention in further detail with reference to the accompanying drawings and embodiments.
The treatment device for biodiesel byproduct crude glycerol of the invention shown in figure 1 comprises a heat exchanger 1, a glass lining kettle 2, a precipitation tank 3, a three-phase centrifuge 4, a receiving tank 5, an adjusting kettle 6, a gear pump 7, a polytetrafluoroethylene-lined pump 8, a cast steel stop valve 9, a polytetrafluoroethylene-lined stop valve 10 and a pipeline; the front of the heat exchanger 1 is connected with a cast steel stop valve 9 and a gear pump 7 through a pipeline, and the rear of the heat exchanger 1 is connected to the upper part of the first-stage glass lining kettle 2 through a pipeline; the bottom discharge hole of the glass lining kettle 2 is connected to the upper feed inlet of the settling tank 3 after being connected with a polytetrafluoroethylene lining pump 8 by a pipeline, and the inlet and the outlet of the pump are provided with polytetrafluoroethylene lining stop valves 10; a discharge port at the bottom of the precipitation tank 3 is connected with a polytetrafluoroethylene-lined stop valve 10 and a polytetrafluoroethylene-lined pump 8 in sequence through pipelines and then divided into two paths, wherein one path is connected with a secondary glass lining kettle 2 for neutralization, and the other path is connected to a biodiesel production system; the bottom discharge port of the second-stage glass lining kettle 2 is connected to the inlet of a three-phase centrifuge 4 after being connected with a gear pump 7 through a pipeline, the inlet of the pump is provided with a polytetrafluoroethylene-lined stop valve 10, and the outlet of the pump is provided with a cast steel stop valve 9; the three-phase centrifuge 4 is provided with two outlets of a heavy phase and a light phase and is respectively connected to the receiving grooves 5 through pipelines; the bottom outlet of the heavy phase receiving tank 5 is connected to the inlet of the adjusting kettle 6 after being connected with a gear pump 7 through a pipeline, the inlet and the outlet of the pump are provided with cast steel stop valves 9, and the bottom outlet of the adjusting kettle 6 is connected to the treated glycerin collecting tank through a pipeline.
The specific flow during operation is as follows: heating crude glycerol to about 60 ℃ by a heat exchanger 1, then sending the crude glycerol to a first-stage glass lining kettle 2 by a gear pump 7, slowly adding inorganic acid while stirring, adjusting the pH to 2-3, and stirring for about 1 hour to completely acidify the crude glycerol; then a polytetrafluoroethylene-lined pump 8 is used for conveying the crude glycerol in the first-stage glass lining kettle 2 into the precipitation tank 3 for standing and precipitating for about 2 hours, and the crude glycerol in the precipitation tank 3 is divided into four layers; a polytetrafluoroethylene lining pump 8 is used for conveying the mixture of the lower inorganic salt, the middle crude glycerin and the flocculent suspended matters in the settling tank 3 into the second-stage glass lining kettle 2, and the mixture of the upper fatty acid, the grease and the biodiesel is conveyed to a biodiesel production system for recycling; adding a sodium hydroxide solution with the concentration of more than 30 percent into the second-stage glass lining kettle 2 to neutralize to be neutral under stirring, sending the mixture to a three-phase centrifuge 4 by a gear pump 7 for separation, and separating out a slag layer, heavy-phase crude glycerol and light-phase flocculent suspended matters which mainly comprise inorganic salts; and (3) conveying the crude glycerol in the receiving tank 5 to an adjusting kettle 6 by using a gear pump 7, and adjusting the pH value to 11-12 by using a sodium hydroxide solution with the concentration of more than 30% under stirring to obtain the treated crude glycerol. The crude glycerol can be used for producing refined glycerol with the glycerol content of more than 97 percent, and other indexes also meet the requirements of national GB/T13206-2011 standard.
Claims (3)
1. A processing apparatus of biodiesel by-product crude glycerine, characterized by: the device comprises a heat exchanger, a glass lining kettle, a settling tank, a three-phase centrifuge, a receiving tank, an adjusting kettle, a gear pump, a polytetrafluoroethylene-lined pump, a cast steel stop valve, a polytetrafluoroethylene-lined stop valve and a pipeline; the inlet of the heat exchanger is connected with a cast steel stop valve and a gear pump through a pipeline, and the outlet of the heat exchanger is connected to the inlet at the upper part of the first-stage glass lining kettle; the bottom discharge hole of the glass lining kettle is connected to the upper feed inlet of the settling tank after being connected with a polytetrafluoroethylene-lined pump by a pipeline, and polytetrafluoroethylene-lined stop valves are arranged at the inlet and the outlet of the polytetrafluoroethylene-lined pump; the bottom discharge port of the settling tank is connected with a polytetrafluoroethylene-lined stop valve and a polytetrafluoroethylene-lined pump in sequence through a pipeline and then is divided into two paths, one path is connected with the secondary glass lining kettle, and the other path is connected to a biodiesel production system; the bottom discharge port of the second-stage glass lining kettle is connected to the inlet of a three-phase centrifuge after being connected with a gear pump through a pipeline, the inlet of the gear pump is provided with a polytetrafluoroethylene-lined stop valve, and the outlet of the gear pump is provided with a cast steel stop valve; the three-phase centrifuge is provided with two outlets of a heavy phase and a light phase and is respectively connected to the receiving grooves through pipelines; the bottom outlet of the heavy phase receiving tank is connected to the inlet of the regulating kettle after being connected with a gear pump through a pipeline, the inlet and the outlet of the pump are respectively provided with a cast steel stop valve, and the bottom outlet of the regulating kettle is connected to the treated glycerol collecting tank through a pipeline.
2. The apparatus for treating by-product crude glycerin of biodiesel according to claim 1, wherein: the heat exchanger is a steam heating heat exchanger and adopts one of a shell and tube type or a spiral plate type heat exchanger.
3. The apparatus for treating by-product crude glycerin of biodiesel according to claim 1, wherein: the first-stage and second-stage glass lining kettles and the adjusting kettle are both provided with a stirrer and a feeding and discharging port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710384215.1A CN107011121B (en) | 2017-05-26 | 2017-05-26 | Processing apparatus of biodiesel by-product crude glycerine |
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| CN201710384215.1A CN107011121B (en) | 2017-05-26 | 2017-05-26 | Processing apparatus of biodiesel by-product crude glycerine |
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| CN107011121B true CN107011121B (en) | 2023-03-17 |
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| CN111393263A (en) * | 2020-05-06 | 2020-07-10 | 龙岩卓越新能源股份有限公司 | Separation device and separation method for glycerin residue as byproduct of biodiesel |
| WO2022155778A1 (en) * | 2021-01-19 | 2022-07-28 | 汇智工程科技股份有限公司 | Automatic oil separation apparatus for use in glycerol refining production process |
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| CN1382762A (en) * | 2002-01-25 | 2002-12-04 | 叶活动 | Process for preparing biological diesel oil from waste animal and plant oil |
| CN201121181Y (en) * | 2007-10-19 | 2008-09-24 | 中兴能源技术（武汉）有限公司 | Serialization separation apparatus for biological diesel oil and glycerol |
| CN101633605A (en) * | 2008-07-23 | 2010-01-27 | 张伟民 | Method for preparing glycerin from byproduct in manufacture procedure of biodiesel |
| CN101481297A (en) * | 2008-12-30 | 2009-07-15 | 浙江工业大学 | Method for refining biodiesel by-product glycerol |
| RU82579U1 (en) * | 2009-02-12 | 2009-05-10 | Общество с ограниченной ответственностью "Юнит С - Саратов" | DEVICE FOR PRODUCING BIODIESEL AND GLYCERINE |
| CN104130867A (en) * | 2014-07-29 | 2014-11-05 | 李安民 | Process and equipment for producing biodiesel by virtue of two-step esterification method |
| CN205635421U (en) * | 2016-04-29 | 2016-10-12 | 广东椰氏实业股份有限公司 | Sweet oil recovery device in alkanolamide production process |
| CN206970505U (en) * | 2017-05-26 | 2018-02-06 | 龙岩卓越新能源股份有限公司 | The processing unit of biodiesel byproduct crude glycerin |
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