CN115159693A - Process and device for preparing composite carbon source by using biodiesel byproduct - Google Patents
Process and device for preparing composite carbon source by using biodiesel byproduct Download PDFInfo
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- CN115159693A CN115159693A CN202210853696.7A CN202210853696A CN115159693A CN 115159693 A CN115159693 A CN 115159693A CN 202210853696 A CN202210853696 A CN 202210853696A CN 115159693 A CN115159693 A CN 115159693A
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- reaction kettle
- carbon source
- composite carbon
- neutralization reaction
- acidification
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- 239000003225 biodiesel Substances 0.000 title claims abstract description 78
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 73
- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 239000006227 byproduct Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 111
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 101
- 230000020477 pH reduction Effects 0.000 claims abstract description 88
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000002253 acid Substances 0.000 claims abstract description 40
- 239000003513 alkali Substances 0.000 claims abstract description 39
- 238000003860 storage Methods 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 69
- 238000003756 stirring Methods 0.000 claims description 55
- 238000005070 sampling Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 21
- 239000000523 sample Substances 0.000 claims description 18
- 239000002893 slag Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000013049 sediment Substances 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 5
- 244000005700 microbiome Species 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000011282 treatment Methods 0.000 description 14
- 239000010865 sewage Substances 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005815 base catalysis Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010806 kitchen waste Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
The invention discloses a device for preparing a composite carbon source by using a biodiesel byproduct, which relates to the technical field of preparation of a composite carbon source for wastewater treatment, and comprises the following steps: the system comprises an acidification reaction kettle, a neutralization reaction kettle, an acid liquor tank, a crude biodiesel recovery tank, a clear water tank, an alkali liquor tank and a composite carbon source storage tank, wherein the acidification reaction kettle is used for supplying biodiesel byproduct raw materials to carry out acidification reaction; the neutralization reaction kettle is used for the neutralization reaction of the biodiesel byproduct raw material; the acid solution tank is used for providing acid solution to the acidification reaction kettle; the crude biodiesel recovery tank is used for recovering substances on the upper layer after the acidification reaction is finished; the clear water tank and the alkali liquor tank are used for providing clear water and alkali liquor to the neutralization reaction kettle; and the composite carbon source storage tank is used for storing the composite carbon source generated after the neutralization reaction is finished. The invention also discloses a process method for preparing the composite carbon source by using the biodiesel by-product, and the prepared composite carbon source has high COD equivalent, extremely low contents of organic matters and inorganic matters which are difficult to degrade, and is easy to decompose and utilize by microorganisms, and is safe to store and transport.
Description
Technical Field
The invention relates to the technical field of preparation of a composite carbon source for wastewater treatment, and particularly relates to a process and a device for preparing a composite carbon source by using a biodiesel byproduct.
Background
In order to protect the water environment from being polluted, china carries out large-scale treatment on urban domestic sewage in recent years, a large number of domestic sewage treatment plants are built, the treatment plants are influenced by various conditions, the problems that the COD (chemical oxygen demand) of inlet water is low and nutrients and carbon sources needed by microorganisms of a biochemical treatment unit are insufficient commonly exist in a plurality of treatment plants, and in order to maintain the biological denitrification efficiency of the biochemical treatment system, carbon sources with higher price, such as acetic acid, glucose and the like, need to be additionally supplemented. Biodiesel is a clean and environment-friendly renewable energy source which is developed in China at a high speed. The preparation process of the domestic large-scale biodiesel is an ester exchange method mainly based on acid-base catalysis, most of biodiesel production raw materials are waste grease (kitchen waste grease, hogwash oil, acidified oil and the like), an acid-base two-step method is generally adopted for production, about 100kg of byproducts are produced when 1 ton of biodiesel finished products are produced, and after treatment, the biodiesel byproducts can be prepared into a cheap composite carbon source to be supplied to a sewage treatment plant, so that the operation cost of a domestic sewage treatment plant can be reduced, and the economic value of the biodiesel byproducts can also be improved. As the by-products have complex components and mainly comprise water, methanol, glycerol, salts, saponified substances, a small amount of biodiesel and the like, the composite carbon source which is used by sewage treatment plants can be prepared by a series of treatments. Compared with the carbon source (acetic acid, sodium acetate, glucose, ethanol and methanol) used by the existing sewage treatment plant, the composite carbon source prepared by adopting the biodiesel byproduct has the characteristics of high COD equivalent, high water solubility, high microorganism utilization efficiency, simple use, safe storage and transportation and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a process for preparing a composite carbon source by using a biodiesel byproduct, and the prepared composite carbon source has high COD equivalent, extremely low contents of organic matters and inorganic matters which are difficult to degrade, mutual solubility with water, easy decomposition and utilization by microorganisms, and safe storage and transportation. The invention also provides a device for preparing the composite carbon source by using the biodiesel byproduct, which is simple to manufacture and maintain and has high yield of the prepared composite carbon source.
In order to achieve the purpose, the invention can adopt the following technical scheme:
a process for preparing a composite carbon source from a biodiesel by-product, comprising:
heating, stirring and continuously adding acid liquor into the biodiesel byproduct raw material in the acidification reaction kettle;
after the acidification reaction is finished, the upper layer material flows into a crude biodiesel recovery tank, and the lower layer material enters a neutralization reaction kettle;
heating and stirring the biodiesel byproduct raw material in the neutralization reaction kettle, and continuously adding clear water and alkali liquor;
and discharging the generated sediments after the neutralization reaction to a sediment storage tank, and discharging other substances into a composite carbon source storage tank.
According to the process for preparing the composite carbon source by utilizing the biodiesel by-product, the acid solution is continuously added until the pH value of the material in the acidification reaction kettle liquid reaches a set value, and the acid solution is stopped being introduced; continuously adding alkali liquor until the pH value of the materials in the neutralization reaction kettle reaches a set value, stopping introducing the alkali liquor, stopping the acidification reaction and the neutralization reaction, and standing for 30 minutes to process the materials.
The invention also provides a device for preparing a composite carbon source by using the biodiesel byproduct, which comprises the following components:
the acidification reaction kettle is used for carrying out acidification reaction on the biodiesel byproduct raw material;
the neutralization reaction kettle is used for neutralizing the biodiesel byproduct raw material;
the acid liquor tank is used for providing acid liquor to the acidification reaction kettle;
the crude biodiesel recovery tank is used for recovering substances on the upper layer after the acidification reaction is finished;
the clear water tank and the alkali liquor tank are used for providing clear water and alkali liquor to the neutralization reaction kettle; and the number of the first and second groups,
and the composite carbon source storage tank is used for storing the composite carbon source generated after the neutralization reaction is finished.
The device for preparing the composite carbon source by using the biodiesel byproduct further comprises a slag storage tank, wherein the slag storage tank is used for receiving sediments generated after the neutralization reaction is finished.
The device for preparing the composite carbon source by using the biodiesel byproduct further comprises a stirring motor arranged on the upper cover of the acidification reaction kettle, wherein the output end of the stirring motor is connected with a plurality of blades through a stirring shaft, and the blades are perpendicular to the stirring shaft.
The device for preparing the composite carbon source by using the biodiesel byproduct further comprises an access hole, an exhaust pipe with a valve, a pressure gauge and a motor support which are arranged on an upper cover of the acidification reaction kettle, wherein the motor support is arranged at the top end of the acidification reaction kettle, the stirring motor is arranged on the motor support, and the upper part of the acidification reaction kettle is connected to the crude biodiesel recovery tank through a drain pipe with a valve.
The device for preparing the composite carbon source by using the biodiesel byproduct further comprises a reaction kettle jacket arranged on the outer wall of the acidification reaction kettle, wherein an inlet and an outlet of the reaction kettle jacket are connected to an external heating pipe through pipelines; a liquid level meter, a sampling pipe, a temperature probe and a heat insulation layer are arranged in the middle of the outer wall of the acidification reaction kettle, and the liquid level meter is used for monitoring the increase and decrease of materials in the acidification reaction kettle; the sampling pipe is used for sampling to monitor the acid value of the materials in the acidification reaction kettle; the temperature probe is used for monitoring the temperature of the materials in the acidification reaction kettle; the heat insulation layer is used for maintaining the temperature of the materials in the acidification reaction kettle; and the lower part of the acidification reaction kettle is provided with a discharge pipe and an emptying pipe, and the discharge pipe is connected to the neutralization reaction kettle through a pipeline with a discharge pump.
The device for preparing the composite carbon source by using the biodiesel byproduct further comprises a stirring motor arranged on the upper cover of the neutralization reaction kettle, wherein the output end of the stirring motor is connected with a plurality of blades through a stirring shaft, and the blades are vertical to the stirring shaft.
The device for preparing the composite carbon source by using the biodiesel byproduct further comprises an access hole, an exhaust pipe with a valve, a pressure gauge and a motor support which are arranged on the upper cover of the neutralization reaction kettle, wherein the motor support is arranged at the top end of the neutralization reaction kettle, the stirring motor is arranged on the motor support, an alkali liquor inlet pipeline and a clear water pipeline are arranged at the upper part of the outer wall of the neutralization reaction kettle, and the alkali liquor inlet pipeline is connected to the alkali liquor tank through a pipeline with a flowmeter, a valve and an alkali adding pump; the clear water pipeline is connected to the clear water tank through a pipeline with a flowmeter, a valve and a clear water pump.
The device for preparing the composite carbon source by using the biodiesel byproduct further comprises a reaction kettle jacket arranged on the outer wall of the neutralization reaction kettle, wherein an inlet and an outlet of the reaction kettle jacket are connected to an external heating pipe through pipelines; a sampling pipe, a temperature probe and a heat insulation layer are arranged in the middle of the neutralization reaction kettle, and the sampling pipe is used for sampling to monitor the acid value of the materials in the neutralization reaction kettle; the temperature probe is used for monitoring the temperature of the materials in the neutralization reaction kettle; the heat insulation layer is used for maintaining the temperature of the materials in the neutralization reaction kettle; and a discharge pipe and a slag discharge pipe are arranged at the bottom of the neutralization reaction kettle, and the discharge pipe is connected to the composite carbon source storage tank through a pipeline with a material pump.
Compared with the prior art, the invention has the beneficial effects that:
1. the device is simple to manufacture and maintain, and the yield of the prepared composite carbon source is high;
2. the composite carbon source prepared by the method has high COD equivalent, extremely low contents of organic matters and inorganic matters which are difficult to degrade, mutual solubility with water, easy decomposition and utilization by microorganisms, and safe storage and transportation;
3. the composite carbon source prepared by the device can reduce the operation cost of a domestic sewage treatment plant, can improve the utilization value of the biodiesel by-products, increases the economic benefit of biodiesel enterprises, and promotes the development of biodiesel industrialization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus for preparing a composite carbon source from a biodiesel byproduct according to an embodiment of the present invention.
Wherein: 1. acidifying the reaction kettle; 2. a discharge pump; 3. an acid liquor tank; 4. adding an acid pump; 5. a neutralization reaction kettle; 6. a material pump; 7. a slag storage tank; 8. a slag discharge pump; 9. a centrifuge; 10. a clean water tank; 11. a clean water pump; 12. an alkali liquor tank; 13. adding an alkali pump; 14. a composite carbon source storage tank; 15. a crude biodiesel recovery tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Example (b):
it should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1, the invention provides a process for preparing a composite carbon source by using a biodiesel byproduct, wherein the prepared composite carbon source has high COD equivalent, low contents of refractory organic matters and inorganic matters, mutual solubility with water, easy decomposition and utilization by microorganisms, and safe storage and transportation. The invention also provides a device for preparing the composite carbon source by using the biodiesel byproduct, which is simple to manufacture and maintain and has high yield of the prepared composite carbon source. The composite carbon source prepared by the device can reduce the running cost of a domestic sewage treatment plant, simultaneously can improve the utilization value of the biodiesel by-products, increase the economic benefit of biodiesel enterprises and promote the development of biodiesel industrialization.
Referring to fig. 1, fig. 1 illustrates an apparatus for preparing a composite carbon source using a biodiesel byproduct, comprising: the system comprises an acidification reaction kettle 1, a neutralization reaction kettle 5, an acid liquor tank 3, a crude biodiesel recovery tank 15, a clear water tank 10, an alkali liquor tank 12 and a composite carbon source storage tank 14, wherein the acidification reaction kettle 1 is used for the biodiesel byproduct raw material to carry out acidification reaction; the neutralization reaction kettle 5 is used for the neutralization reaction of the biodiesel byproduct raw material; the acid liquor tank 3 is used for providing acid liquor to the acidification reaction kettle 1; the crude biodiesel recovery tank 15 is used for recovering substances on the upper layer after the acidification reaction is finished; the clear water tank 10 and the lye tank 12 are used for providing clear water and lye for the neutralization reaction kettle 5; the composite carbon source storage tank 14 is used for storing the composite carbon source generated after the neutralization reaction is finished.
In the embodiment, when the device disclosed by the invention is used for preparing the composite carbon source, acid liquor in an acid liquor tank 3 is pumped into an acidification reaction kettle 1 in advance through a pipeline with an acid adding pump 4, the acid liquor is stopped to be fed when the pH value in the acidification reaction kettle 1 reaches a set value, raw materials and the acid liquor react in the acidification reaction kettle 1, the materials in the acidification reaction kettle 1 after reaction is stopped are divided into two layers after standing, the upper-layer materials such as crude biodiesel and fatty acid flow into a crude biodiesel recovery tank 15, and the lower-layer materials flow into a neutralization reaction kettle 5 through a pipeline with a discharge pump 2. Clear water in the clear water tank 10 and alkali liquor in the alkali liquor tank 12 are introduced into the neutralization reaction kettle 5 through pipelines, the alkali liquor is stopped to be introduced when the pH value of materials in the neutralization reaction kettle 5 reaches a set value, the materials react in the neutralization reaction kettle 5, and after the reaction is stopped, the materials in the neutralization reaction kettle 5 are discharged into the composite carbon source storage tank 14 through a pipeline with a material pump 6. The device has the advantages of simple manufacture and maintenance, high yield of the prepared composite carbon source, high COD equivalent of the prepared composite carbon source, extremely low contents of organic matters and inorganic matters which are difficult to degrade, mutual solubility with water, easy decomposition and utilization by microorganisms, and safe storage and transportation.
As an optional implementation manner, in some embodiments, the system further includes a slag storage tank 7, and the slag storage tank 7 is used for receiving sediments generated after the neutralization reaction is finished. Specifically, sediments such as saponified substances, inorganic salts and pigments generated by neutralizing materials in the reaction kettle 5 are discharged to the slag storage tank 7 through a valve at the bottom of the neutralization reaction kettle 5 after the reaction is stopped and the sediments are stood for 30 minutes. Further, the slag liquid in the slag storage tank 7 is subjected to solid-liquid separation through a pipeline with a slag outlet pump 8 and a centrifugal pump, clear liquid returns to the clean water tank 10 for recycling, and separated solid matters are collected and then are treated in a unified manner.
As an optional implementation manner, in some embodiments, the upper cover of the acidification reactor 1 is provided with a stirring motor, an output end of the stirring motor is connected with a plurality of blades through a stirring shaft, and the plurality of blades are perpendicular to the stirring shaft.
Specifically, the stirring motor is connected with two blades inside the acidification reaction kettle 1 through a stirring shaft, and the blades are in an anchor structure and are vertically connected with the stirring shaft. When the device provided by the invention operates, the stirring motor drives the stirring shaft in the acidification reaction kettle 1 to drive the blades to rotate at a set stirring revolution, so that the raw materials of the acidification reaction kettle 1 and the acid liquor are reacted fully.
In the above embodiment, further, the upper cover of the acidification reaction kettle 1 is further provided with an access hole, an exhaust pipe with a valve, a pressure gauge and a motor support, the motor support is installed on the top end of the acidification reaction kettle 1, the motor support is provided with a stirring motor, and the upper part of the acidification reaction kettle 1 is connected to the crude biodiesel recovery tank 15 through a drain pipe with a valve.
Specifically, the upper cover of acidizing reation kettle 1 passes through the bolt to be connected with the reation kettle lateral wall, and the upper cover is provided with the access hole, under reation kettle goes out the condition of problem, can only need open the access hole and can inspect the maintenance. The upper cover of the reaction kettle is also provided with a pressure gauge for detecting the pressure value in the reaction kettle. The lateral wall of reation kettle is connected with heat conduction oil pipe, and it is used for improving heating power and degree of consistency, improves the interior material reaction rate of cauldron.
In the above embodiment, further, the outer wall of the acidification reactor 1 is provided with a reactor jacket, and an inlet and an outlet of the reactor jacket are both connected to an external heating pipe through a pipeline; a liquid level meter, a sampling pipe, a temperature probe and a heat insulation layer are arranged in the middle of the outer wall of the acidification reaction kettle 1, and the liquid level meter is used for monitoring the increase and decrease of materials in the acidification reaction kettle 1; the sampling tube is used for sampling to monitor the acid value of the material in the acidification reaction kettle 1; the temperature probe is used for monitoring the temperature of the materials in the acidification reaction kettle 1; the heat insulation layer is used for maintaining the temperature of the materials in the acidification reaction kettle 1; the lower part of the acidification reaction kettle 1 is provided with a discharge pipe and an emptying pipe, and the discharge pipe is connected to the neutralization reaction kettle 5 through a pipeline with a discharge pump 2.
Specifically, the outer wall of the acidification reaction kettle 1 is provided with a reaction kettle jacket, when the device provided by the invention operates, valves at the inlet and the outlet of the jacket of the acidification reaction kettle 1 are opened, and a heat source is introduced for heating and warming, so that the heat preservation effect can be achieved. In addition, the middle part of the outer wall of the acidification reaction kettle 1 is provided with a liquid level meter, a sampling tube, a temperature probe and a heat insulation layer, wherein the liquid level meter can conveniently observe the increase and decrease of materials in the acidification reaction kettle 1. The sampling can be conveniently carried out by arranging the sampling tube, and the acid value of the raw materials in the acidification reaction kettle 1 can be regularly monitored and analyzed. The heat preservation layer is arranged, so that materials in the acidification reaction kettle 1 can be kept at a certain temperature, and the heat loss is reduced.
As an optional implementation manner, in some embodiments, the upper cover of the neutralization reaction kettle 5 is provided with a stirring motor, an output end of the stirring motor is connected with a plurality of blades through a stirring shaft, and the plurality of blades are perpendicular to the stirring shaft.
Specifically, the stirring motor is connected with two blades inside the neutralization reaction kettle 5 through a stirring shaft, and the blades are in an anchor structure and are vertically connected with the stirring shaft. When the device provided by the invention operates, the stirring shaft in the neutralization reaction kettle 5 is driven by the stirring motor to drive the blades to rotate at a set stirring revolution, so that the materials in the neutralization reaction kettle 5 are fully reacted.
In the above embodiment, further, the upper cover of the neutralization reaction kettle 5 is further provided with an access hole, an exhaust pipe with a valve, a pressure gauge and a motor support, the motor support is installed at the top end of the neutralization reaction kettle 5, the motor support is provided with a stirring motor, the upper part of the outer wall of the neutralization reaction kettle 5 is provided with an alkali liquor inlet pipeline and a clear water pipeline, and the alkali liquor inlet pipeline is connected to the alkali liquor tank 12 through a pipeline with a flow meter, a valve and an alkali adding pump 13; the clean water pipeline is connected to the clean water tank 10 through a pipeline with a flow meter, valves and clean water pump 11.
Specifically, the upper cover of neutralization reaction kettle 5 is connected with the side wall of the reaction kettle through a bolt, the upper cover is also provided with an access hole, and the inspection and the maintenance can be carried out only by opening the access hole under the condition that neutralization reaction kettle 5 goes wrong. The upper cover of the neutralization reaction kettle 5 is also provided with a pressure gauge for detecting the pressure value in the neutralization reaction kettle 5. The side wall of the neutralization reaction kettle 5 is connected with a heat conduction oil pipe for improving the heating capacity and the uniformity and improving the material reaction speed in the kettle.
In the above embodiment, further, the outer wall of the neutralization reaction kettle 5 is provided with a reaction kettle jacket, and an inlet and an outlet of the reaction kettle jacket are both connected to an external heating pipe through a pipeline; a sampling pipe, a temperature probe and a heat preservation layer are arranged in the middle of the neutralization reaction kettle 5, and the sampling pipe is used for sampling to monitor the acid value of the materials in the neutralization reaction kettle 5; the temperature probe is used for monitoring the temperature of the materials in the neutralization reaction kettle 5; the heat insulation layer is used for maintaining the temperature of materials in the neutralization reaction kettle 5; the bottom of the neutralization reaction kettle 5 is provided with a discharge pipe and a slag discharge pipe, and the discharge pipe is connected to a composite carbon source storage tank 14 through a pipeline with a material pump 6.
Specifically, the outer wall of the neutralization reaction kettle 5 is provided with a reaction kettle jacket, when the device provided by the invention operates, valves at the inlet and the outlet of the jacket of the neutralization reaction kettle 5 are opened, and a heat source is introduced for heating and warming, so that the heat preservation effect can be achieved. In addition, the middle part of neutralization reaction kettle 5 is equipped with sampling tube, temperature probe and heat preservation, wherein, can conveniently take a sample through setting up the sampling tube, and the condition of material in the periodic monitoring analysis neutralization reaction kettle 5 sets up temperature probe and can monitors the temperature in the neutralization reaction kettle 5. Heating steam is filled in the heat-insulating layer, so that materials in the neutralization reaction kettle 5 can be kept at a certain temperature, and the loss of heat is reduced. In addition, the neutralization reaction kettle 5 is also provided with a liquid level meter and a pH meter probe, and the liquid level meter can be used for conveniently observing the increase and decrease of the materials in the neutralization reaction kettle 5; the pH meter probe is used for monitoring and analyzing the acid value of the materials in the reaction kettle.
The invention also discloses a process method for preparing the composite carbon source by using the biodiesel byproduct, which comprises the following steps:
the biodiesel byproduct raw material enters the acidification reaction kettle 1 through a pipeline; opening valves at an inlet and an outlet of a jacket of the acidification reaction kettle 1, and introducing a heat source for heating; meanwhile, a stirring motor arranged on a motor support is started, acid liquor in an acid liquor tank 3 enters the interior of the acidification reaction kettle 1 through a pipeline with a valve, a flowmeter and an acid adding pump 4, and the acid liquor is stopped to be fed when the pH value of the material in the acidification reaction kettle 1 reaches a set value; the stirring shaft in the acidification reaction kettle 1 drives the paddle to rotate at a set stirring revolution, and the raw material and the acid liquor react in the acidification reaction kettle 1.
After the reaction is stopped and the mixture is kept stand for 30 minutes, the materials in the acidification reaction kettle 1 are divided into two layers, a valve at the upper part of the outer wall of the acidification reaction kettle 1 is opened, the upper-layer materials such as crude biodiesel, fatty acid and the like automatically flow into a crude biodiesel recovery tank 15, and the lower-layer materials enter a neutralization reaction kettle 5 through a pipeline with a discharge pump 2.
Opening valves at an inlet and an outlet of a jacket of the neutralization reaction kettle 5, and introducing a heat source for heating; simultaneously starting a stirring motor arranged on a motor bracket on the upper cover of the neutralization reaction kettle 5, feeding clear water in a clear water tank 10 into the neutralization reaction kettle 5 through a clear water pipe with a valve, a flowmeter and a clear water pump 11, feeding alkali liquor in an alkali liquor tank 12 into the neutralization reaction kettle 5 through an alkali adding pipe with a valve, a flowmeter and an alkali adding pump 13, and stopping feeding the alkali liquor when the pH value of materials in the neutralization reaction kettle 5 reaches a set value; the stirring shaft in the neutralization reaction kettle 5 drives the paddle to rotate at a set stirring revolution, and the materials react in the neutralization reaction kettle 5.
After the reaction is stopped and the reaction kettle is kept still for 30 minutes, the generated sediments of saponifiable matter, inorganic salt, pigment and the like are discharged into a residue storage tank 7 through a valve at the bottom of the neutralization reaction kettle 5, and the materials in the neutralization reaction kettle 5 are discharged into a composite carbon source storage tank 14 through a pipeline with a material pump 6.
The slag liquid of the slag storage tank 7 is subjected to solid-liquid separation through a pipeline with a slag outlet pump 8 and a centrifugal pump, clear liquid returns to the clean water tank 10 for recycling, and separated solid matters are collected and then are treated in a unified way.
The process for preparing the composite carbon source by 1 ton of biodiesel byproduct is taken as an example to explain the process method in detail.
Firstly, opening valves of a jacket inlet and a jacket outlet of an acidification reaction kettle 1 and a neutralization reaction kettle 5, introducing a heat source to heat and raise the temperature, feeding the raw materials into the acidification reaction kettle 1 through a feeding pipe with the valve, pumping hydrochloric acid solution (the concentration is 2 mol/l) in an acid solution tank 3 into the acidification reaction kettle 1 through a pipeline with the valve, a flowmeter and an acid adding pump 4, and closing the acid adding pump 4 when the pH value of the materials in the acidification reaction kettle 1 is 3.5; simultaneously keeping the temperature of the materials in the acidification reaction kettle 1 at 60 ℃; maintaining the revolution of a stirrer at the top of the acidification reaction kettle 1 at 200rpm/min, stirring for 30 minutes, stopping stirring, standing for 30 minutes, opening a liquid outlet pipe valve at the upper part of the acidification reaction kettle 1, and allowing upper-layer liquid such as crude biodiesel, fatty acid and the like to automatically flow into a crude biodiesel recovery tank 15; the material at the lower layer of the acidification reaction kettle 1 is neutralized by a pipeline with a valve and a feed pump to a reaction kettle 5, the revolution of a stirrer at the top of the neutralization reaction kettle 5 is kept at 200rpm/min, clear water in 100kg of a clear water tank 10 is pumped into the neutralization reaction kettle 5 by a pipeline with a valve, a flowmeter and a clear water pump 11, a sodium hydroxide solution (with the concentration of 2 mol/l) in an alkali liquor tank 12 is pumped into the neutralization reaction kettle 5 by a pipeline with a valve, a flowmeter and an alkali adding pump 13, and the alkali adding pump 13 is closed when the pH of the reactant in the kettle is 7.0; while maintaining the temperature of the materials in the kettle at 60 ℃. Keeping the revolution of a stirrer at the top of a neutralization reaction kettle 5 at 200rpm/min, stopping stirring after 30 minutes, after standing for 45 minutes, dividing materials in the reaction kettle into two layers, discharging sediments such as saponified substances, inorganic salts, pigments and the like at the lower layer into a slag storage tank 7 through a pipeline with a valve at the bottom of the reaction kettle, and pumping materials at the upper layer into a composite carbon source storage tank 14 through a pipeline with a valve and a material pump 6; the sediment in the sediment storage tank 7 is subjected to solid-liquid separation through a pipeline with a sediment outlet pump 8 and a centrifugal machine 9, clear liquid returns to a clear water tank 10, and the separated solid matters are collected and processed uniformly.
The composite carbon source prepared by the process method has high COD equivalent, low content of organic matters and inorganic matters which are difficult to degrade, mutual solubility with water, easy decomposition and utilization by microorganisms, and safe storage and transportation.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. A process method for preparing a composite carbon source by using a biodiesel byproduct is characterized by comprising the following steps:
heating, stirring and continuously adding acid liquor into the biodiesel byproduct raw material in the acidification reaction kettle;
after the acidification reaction is finished, the upper layer material flows into a crude biodiesel recovery tank, and the lower layer material enters a neutralization reaction kettle;
heating and stirring the biodiesel byproduct raw material in the neutralization reaction kettle, and continuously adding clear water and alkali liquor;
and discharging sediments generated after the neutralization reaction to a sediment storage tank, and discharging other substances into a composite carbon source storage tank.
2. The process for preparing a composite carbon source by using the biodiesel by-product as claimed in claim 1, wherein the acid solution is continuously added until the pH value of the material in the acidification reaction kettle reaches a set value, and the introduction of the acid solution is stopped; continuously adding alkali liquor until the pH value of the materials in the neutralization reaction kettle reaches a set value, stopping introducing the alkali liquor, stopping the acidification reaction and the neutralization reaction, and standing for 30 minutes to process the materials.
3. An apparatus for preparing a composite carbon source from a biodiesel by-product, comprising:
the acidification reaction kettle is used for carrying out acidification reaction on the biodiesel byproduct raw material;
the neutralization reaction kettle is used for performing neutralization reaction on the biodiesel byproduct raw material;
the acid liquor tank is used for providing acid liquor to the acidification reaction kettle;
the crude biodiesel recovery tank is used for recovering substances on the upper layer after the acidification reaction is finished;
the clear water tank and the alkali liquor tank are used for providing clear water and alkali liquor to the neutralization reaction kettle; and (c) a second step of,
and the composite carbon source storage tank is used for storing the composite carbon source generated after the neutralization reaction is finished.
4. The apparatus for preparing a composite carbon source from a biodiesel byproduct as claimed in claim 3, further comprising a slag storage tank for receiving the sediment generated after the neutralization reaction is completed.
5. The apparatus for preparing composite carbon source from biodiesel byproduct as claimed in claim 3, wherein the top cover of the acidification reaction kettle is provided with a stirring motor, the output end of the stirring motor is connected with a plurality of blades through a stirring shaft, and the plurality of blades are perpendicular to the stirring shaft.
6. The apparatus for preparing composite carbon source from biodiesel byproduct as claimed in claim 5, wherein the top cover of the acidification reactor is further provided with an access hole, an exhaust pipe with valve, a pressure gauge and a motor support, the motor support is mounted on the top end of the acidification reactor, the stirring motor is mounted on the motor support, and the upper part of the acidification reactor is connected to the crude biodiesel recovery tank through a drain pipe with valve.
7. The apparatus for preparing composite carbon source from biodiesel byproduct as claimed in claim 3, wherein the outer wall of the acidification reaction kettle is provided with a reaction kettle jacket, and the inlet and outlet of the reaction kettle jacket are connected to an external heating pipe through pipes; a liquid level meter, a sampling pipe, a temperature probe and a heat insulation layer are arranged in the middle of the outer wall of the acidification reaction kettle, and the liquid level meter is used for monitoring the increase and decrease of materials in the acidification reaction kettle; the sampling pipe is used for sampling to monitor the acid value of the materials in the acidification reaction kettle; the temperature probe is used for monitoring the temperature of the materials in the acidification reaction kettle; the heat insulation layer is used for maintaining the temperature of the materials in the acidification reaction kettle; and the lower part of the acidification reaction kettle is provided with a discharge pipe and an emptying pipe, and the discharge pipe is connected to the neutralization reaction kettle through a pipeline with a discharge pump.
8. The apparatus for preparing composite carbon source from biodiesel byproduct as claimed in claim 3, wherein the upper cover of the neutralization reaction kettle is provided with a stirring motor, the output end of the stirring motor is connected with a plurality of blades through a stirring shaft, and the plurality of blades are perpendicular to the stirring shaft.
9. The apparatus for preparing composite carbon source from biodiesel byproduct according to claim 8, wherein the top cover of the neutralization reaction kettle is further provided with an access port, an exhaust pipe with a valve, a pressure gauge and a motor support, the motor support is mounted at the top end of the neutralization reaction kettle, the stirring motor is mounted on the motor support, the upper part of the outer wall of the neutralization reaction kettle is provided with an alkali liquor inlet pipeline and a clear water pipeline, and the alkali liquor inlet pipeline is connected to the alkali liquor tank through a pipeline with a flow meter, a valve and an alkali adding pump; the clear water pipeline is connected to the clear water tank through a pipeline with a flowmeter, a valve and a clear water pump.
10. The apparatus for preparing composite carbon source from biodiesel byproduct as claimed in claim 3, wherein the outer wall of the neutralization reaction kettle is provided with a reaction kettle jacket, and the inlet and outlet of the reaction kettle jacket are connected to an external heating pipe through pipes; a sampling pipe, a temperature probe and a heat insulation layer are arranged in the middle of the neutralization reaction kettle, and the sampling pipe is used for sampling to monitor the acid value of the materials in the neutralization reaction kettle; the temperature probe is used for monitoring the temperature of the materials in the neutralization reaction kettle; the heat insulation layer is used for maintaining the temperature of the materials in the neutralization reaction kettle; and the bottom of the neutralization reaction kettle is provided with a discharge pipe and a slag discharge pipe, and the discharge pipe is connected to the composite carbon source storage tank through a pipeline with a material pump.
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