Acid reaction system for biodiesel

Abstract

The utility model discloses a biodiesel acid process reaction system which comprises a biodiesel production mechanism, a drying mechanism connected out of the biodiesel production mechanism, and a mixer connected out of the drying mechanism and externally connected with a methanol source and a sulfuric acid source, the technical problems that an existing biodiesel deacidification technology is independent of a biodiesel enzyme method catalytic production technology, so that the overall procedure in a workshop is complex, the occupied area of equipment is large, raw material consumption is large, energy consumption is high, the process from biodiesel generation to deacidification is interrupted, and the biodiesel treatment efficiency in the workshop is low are solved. The biodiesel deacidification device is directly connected out of a biodiesel production mechanism, deacidifies biodiesel produced by the biodiesel production mechanism, recycles raw materials used in the deacidification process, and applies the recycled raw materials to a front-end biodiesel production mechanism, so that the process from generation to deacidification of the biodiesel is a continuous process; the biodiesel treatment device is simple in structure, avoids interruption of biodiesel treatment, reduces raw material consumption in a workshop while improving biodiesel treatment efficiency, and is simple in process, less in used equipment, and capable of reducing occupied space of the equipment in the workshop and energy consumption.

Description

Technical Field

[0001] The present utility model belongs to the technical field of biodiesel production, and particularly relates to an acid reaction system for biodiesel. Background Art

[0002] Fatty acid methyl ester (biodiesel) can be generated by the transesterification reaction of lipid compounds in animal and vegetable oils and waste oils with methanol under the catalysis of a catalyst, or can be generated by the esterification reaction of fatty acids with methanol under the catalysis of a catalyst. Fatty acids can be generated by the hydrolysis of animal and vegetable oils and waste oils, or can be generated by adding alkali for saponification in animal and vegetable oils and waste oils and then acidifying. Biodiesel production processes include enzymatic catalysis processes and acid catalysis processes, etc. Since the components of biodiesel production raw materials are relatively complex, the biodiesel generated by the enzymatic catalysis process will contain some fatty acids. To improve the purity of biodiesel, it is necessary to carry out deacidification treatment on the biodiesel to remove the fatty acids in the biodiesel. However, the existing biodiesel deacidification process is independent of the biodiesel enzymatic catalysis production process. In the biodiesel production workshop, the biodiesel generation process and the deacidification process are carried out separately, resulting in complex overall processes in the workshop, wide equipment floor area, large raw material consumption, high energy consumption, and interruption in the process from biodiesel generation to deacidification, making the biodiesel treatment efficiency in the workshop relatively low. Content of the Utility Model

[0003] The technical problem to be solved by the present utility model is: to provide an acid reaction system for biodiesel to solve at least some of the above technical problems.

[0004] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0005] An acid reaction system for biodiesel includes a biodiesel production mechanism, and further includes a drying mechanism connected from the biodiesel production mechanism, a mixer connected from the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reaction kettle connected from the mixer, a flash tank connected from the deacidification reaction kettle, a methanol recovery mechanism respectively connected from the deacidification reaction kettle and the flash tank and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected from the flash tank.

[0006] Further, the biodiesel purification mechanism includes a conveying mechanism connected from the flash tank and connected to the drying mechanism and the mixer, and an acid neutralization mechanism connected from the drying mechanism and externally connected to a dealcoholization mechanism.

[0007] Further, the conveying mechanism includes a conveying main pipe connected from the bottom of the flash tank, a conveying branch pipe connected from the conveying main pipe and having one end connected to the mixer and the other end connected to the drying mechanism, and a first conveying pump and a second conveying pump arranged in parallel on the conveying main pipe; a first conveying valve is provided at the end of the conveying branch pipe inputting to the mixer, and a second conveying valve is provided at the other end inputting to the drying mechanism.

[0008] Further, the acid neutralization mechanism includes a first neutralization pipe connected to the drying mechanism, a first buffer tank connected to the first neutralization pipe, a neutralization kettle connected to the first buffer tank and communicating with an external alkali methanol source, and a second buffer tank connected to the neutralization kettle and connected to an external alcohol removal mechanism.

[0009] Further, a second neutralization pipe is connected between the first buffer tank and the neutralization kettle. A first neutralization pump and a second neutralization pump are arranged in parallel on the second neutralization pipe. A third neutralization pipe and a fourth neutralization pipe are connected between the neutralization kettle and the second buffer tank. A fifth neutralization pipe is connected to the second buffer tank. A third neutralization pump and a fourth neutralization pump are arranged in parallel on the fifth neutralization pipe. The fifth neutralization pipe is connected to an external alcohol removal mechanism.

[0010] Further, the drying mechanism includes a drying heat exchanger connected to the biodiesel production mechanism, a drying heater connected to the drying heat exchanger, and a vacuum drying tower connected to the drying heater and connected to the mixer; the conveying mechanism is connected to the drying heat exchanger, and the acid neutralization mechanism is connected to the drying heat exchanger.

[0011] Further, a first pipe is connected between the biodiesel production mechanism and the drying heat exchanger. A third valve is arranged on the first pipe. A second pipe is connected between the drying heat exchanger and the drying heater. A third pipe is connected between the drying heater and the vacuum drying tower. A fourth pipe is connected between the vacuum drying tower and the mixer. A second pump and a third pump are arranged in parallel on the fourth pipe.

[0012] Further, the methanol recovery mechanism includes a wastewater collection kettle connected to the acid reduction reaction kettle, a methanol concentration tower respectively connected to the wastewater collection kettle and the flash tank, a methanol conveying pipe connected to the methanol concentration tower and connected to the biodiesel production mechanism, and a condensation mechanism connected to the top of the methanol concentration tower and connected to the methanol conveying pipe; a fifth pipe connected to the external acidification tank is connected to the wastewater collection kettle. A fourth pump is arranged on the fifth pipe. A first valve and a first pump are arranged in sequence on the methanol conveying pipe along its conveying direction. The condensation mechanism is connected between the first valve and the first pump.

[0013] Further, the condensation mechanism includes a secondary conveying pipe connected to the methanol concentration tower and connected to the methanol conveying pipe, and a primary condenser, a secondary condenser and a condensation collection tank arranged in sequence on the secondary conveying pipe along the conveying direction of the secondary conveying pipe; a second valve is arranged on the secondary conveying pipe between the condensation collection tank and the methanol conveying pipe.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model has a simple structure, is scientifically and reasonably designed, and is convenient to use. The utility model is used as the subsequent part of the biodiesel production process. The system of the utility model is directly connected from a biodiesel production mechanism, reduces the acid of the biodiesel produced by the biodiesel production mechanism, recovers the raw materials used in the acid reduction process, and reuses the recovered raw materials for the front-end biodiesel production mechanism, so that the biodiesel from generation to acid reduction is a continuous process, avoiding the interruption of biodiesel treatment, improving the biodiesel treatment efficiency, and reducing the raw material consumption in the workshop as a whole; the utility model first dries the generated biodiesel, then passes the dried biodiesel into an acid reduction reaction kettle to remove fatty acids, and finally purifies the biodiesel and recovers the raw materials. The process is simple, the equipment used is less, and the equipment occupation and energy consumption in the workshop are reduced as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the utility model.

[0017] Among them, the names corresponding to the reference numerals are:

[0018] 1 - mixer, 2 - acid reduction reaction kettle, 3 - flash tank, 4 - main transfer pipe, 5 - transfer branch pipe, 6 - first transfer pump, 7 - second transfer pump, 8 - first transfer valve, 9 - second transfer valve, 10 - first neutralization pipe, 11 - first buffer tank, 12 - neutralization kettle, 13 - second buffer tank, 14 - second neutralization pipe, 15 - first neutralization pump, 16 - second neutralization pump, 17 - third neutralization pipe, 18 - fourth neutralization pipe, 19 - fifth neutralization pipe, 20 - third neutralization pump, 21 - fourth neutralization pump, 22 - waste water collection kettle, 23 - methanol concentration tower, 24 - methanol transfer pipe, 25 - first valve, 26 - first pump, 27 - secondary transfer pipe, 28 - first-stage condenser, 29 - second-stage condenser, 30 - condensation collection tank, 31 - second valve, 32 - biodiesel production mechanism, 33 - drying heat exchanger, 34 - drying heater, 35 - vacuum drying tower, 36 - first pipe, 37 - third valve, 38 - second pipe, 39 - third pipe, 40 - fourth pipe, 41 - second pump, 42 - third pump, 43 - fifth pipe, 44 - fourth pump, 45 - vacuum pipe, 46 - first external pipe, 47 - second external pipe, 48 - third external pipe, 49 - waste water pipe, 50 - second waste water pipe, 51 - second waste water valve, 53 - sixth pipe, 54 - sixth valve, 55 - seventh pipe, 56 - eighth pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] Embodiment 1

[0023] As Figure 1 shown, a biodiesel acid-catalyzed reaction system provided by the present utility model includes a biodiesel production mechanism 32, and also includes a drying mechanism connected to the biodiesel production mechanism, a mixer 1 connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reaction kettle 2 connected to the mixer 1, a flash tank 3 connected to the deacidification reaction kettle 2, a methanol recovery mechanism respectively connected to the deacidification reaction kettle 2 and the flash tank 3 and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected to the flash tank 3.

[0024] The utility model has a simple structure, is scientifically and reasonably designed, and is convenient to use. The utility model is used as the subsequent part of the biodiesel production process. The system of the utility model is directly connected from a biodiesel production mechanism, reduces the acid of the biodiesel produced by the biodiesel production mechanism, recovers the raw materials used in the acid reduction process, and reuses the recovered raw materials for the front-end biodiesel production mechanism, so that the biodiesel from generation to acid reduction is a continuous process, avoiding the interruption of biodiesel treatment, improving the biodiesel treatment efficiency, and reducing the raw material consumption in the workshop as a whole; the utility model first dries the produced biodiesel, then passes the dried biodiesel into an acid reduction reaction kettle to remove fatty acids, and finally purifies the biodiesel and recovers the raw materials. The process is simple, few devices are used, and the equipment occupation and energy consumption in the workshop are reduced as a whole.

[0025] Embodiment 2

[0026] As Figure 1 shown, a biodiesel acid method reaction system provided by the utility model includes a biodiesel production mechanism 32, and also includes a drying mechanism connected from the biodiesel production mechanism, a mixer 1 connected from the drying mechanism and externally connected to a methanol source and a sulfuric acid source, an acid reduction reaction kettle 2 connected from the mixer 1, a flash tank 3 connected from the acid reduction reaction kettle 2, a methanol recovery mechanism respectively connected from the acid reduction reaction kettle 2 and the flash tank 3 and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected from the flash tank 3.

[0027] The biodiesel purification mechanism includes a conveying mechanism connected from the flash tank 3 and connected to the drying mechanism and the mixer 1, and an acid neutralization mechanism connected from the drying mechanism and externally connected to a dealcoholization mechanism.

[0028] In this Embodiment 2, the conveying mechanism inputs the liquid phase separated in the flash tank 3 into the mixer 1. After the liquid phase is mixed with methanol and concentrated sulfuric acid from the outside in the mixer, it is passed into the acid reduction reaction kettle again for further reaction, and then passed from the acid reduction reaction kettle into the flash tank 3 for gas-liquid separation. The conveying mechanism inputs the liquid phase separated by the flash tank 3 into the mixer 1 again. This process is repeated, so that the mixer 1, the acid reduction reaction kettle and the flash tank 3 perform cyclic treatment on the liquid phase until there is no fatty acid or the fatty acid content in the liquid phase is insufficient to affect the quality of biodiesel. Then, the conveying mechanism is used to input the liquid phase separated by the flash tank 3 into the drying mechanism for heat exchange. After heat exchange, it is input into the biodiesel purification mechanism for neutralization treatment.

[0029] Embodiment 3

[0030] As Figure 1As shown in the figure, a biological diesel acid reaction system provided by the present utility model includes a biological diesel production mechanism 32, and further includes a drying mechanism connected to the biological diesel production mechanism, a mixer 1 connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reaction kettle 2 connected to the mixer 1, a flash tank 3 connected to the deacidification reaction kettle 2, a methanol recovery mechanism respectively connected to the deacidification reaction kettle 2 and the flash tank 3 and connected to the biological diesel production mechanism, and a biological diesel purification mechanism connected to the flash tank 3.

[0031] The biological diesel purification mechanism includes a conveying mechanism connected to the flash tank 3 and connected to the drying mechanism and the mixer 1, and an acid neutralization mechanism connected to the drying mechanism and externally connected to a dealcoholization mechanism.

[0032] The conveying mechanism includes a conveying main pipe 4 connected to the bottom of the flash tank 3, a conveying branch pipe 5 connected to the conveying main pipe 4 and connected to the mixer 1 at one end and connected to the drying mechanism at the other end, and a conveying pump 6 and a conveying pump 7 arranged in parallel on the conveying main pipe 4; a conveying valve 8 is arranged at one end of the conveying branch pipe 5 input to the mixer 1, and a conveying valve 9 is arranged at the other end input to the drying mechanism.

[0033] In this embodiment 3, based on embodiment 2, when the liquid phase in the flash tank 3 is input into the mixer 1, the conveying valve 8 is opened, the conveying valve 9 is closed, and the conveying pump 6 or the conveying pump 7 is opened. When the liquid phase in the flash tank 3 is input into the drying mechanism, the conveying valve 9 is opened, the conveying valve 8 is closed, and the conveying pump 6 or the conveying pump 7 is opened.

[0034] When one of the conveying pump 6 and the conveying pump 7 is damaged, the other can still be used.

[0035] Embodiment 4

[0036] As Figure 1 As shown in the figure, a biological diesel acid reaction system provided by the present utility model includes a biological diesel production mechanism 32, and further includes a drying mechanism connected to the biological diesel production mechanism, a mixer 1 connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reaction kettle 2 connected to the mixer 1, a flash tank 3 connected to the deacidification reaction kettle 2, a methanol recovery mechanism respectively connected to the deacidification reaction kettle 2 and the flash tank 3 and connected to the biological diesel production mechanism, and a biological diesel purification mechanism connected to the flash tank 3.

[0037] The biological diesel purification mechanism includes a conveying mechanism connected to the flash tank 3 and connected to the drying mechanism and the mixer 1, and an acid neutralization mechanism connected to the drying mechanism and externally connected to a dealcoholization mechanism.

[0038] The acid neutralization mechanism includes a first neutralization pipe 10 connected to the drying mechanism, a first buffer tank 11 connected to the first neutralization pipe 10, a neutralization kettle 12 connected to the first buffer tank 11 and connected to an external alkali methanol source, and a second buffer tank 13 connected to the neutralization kettle 12 and connected to an external alcohol removal mechanism.

[0039] Embodiment 4 is based on Embodiment 2. In Embodiment 4, the liquid phase after heat exchange by the drying mechanism undergoes a neutralization reaction with alkali methanol. Thus, sulfuric acid in the liquid phase can be removed, which is beneficial to the subsequent purification of the liquid phase. An external third pipe 48 is connected to the neutralization kettle 12, and the external third pipe 48 is connected to an external alkali methanol source.

[0040] Embodiment 5

[0041] As Figure 1 shown, a biodiesel acid-catalyzed reaction system provided by the present utility model includes a biodiesel production mechanism 32, and also includes a drying mechanism connected to the biodiesel production mechanism, a mixer 1 connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reaction kettle 2 connected to the mixer 1, a flash tank 3 connected to the deacidification reaction kettle 2, a methanol recovery mechanism respectively connected to the deacidification reaction kettle 2 and the flash tank 3 and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected to the flash tank 3.

[0042] The biodiesel purification mechanism includes a conveying mechanism connected to the flash tank 3 and connected to the drying mechanism and the mixer 1, and an acid neutralization mechanism connected to the drying mechanism and externally connected to an alcohol removal mechanism.

[0043] The acid neutralization mechanism includes a first neutralization pipe 10 connected to the drying mechanism, a first buffer tank 11 connected to the first neutralization pipe 10, a neutralization kettle 12 connected to the first buffer tank 11 and connected to an external alkali methanol source, and a second buffer tank 13 connected to the neutralization kettle 12 and connected to an external alcohol removal mechanism.

[0044] A second neutralization pipe 14 is connected between the first buffer tank 11 and the neutralization kettle 12. A first neutralization pump 15 and a second neutralization pump 16 are arranged in parallel on the second neutralization pipe 14. A third neutralization pipe 17 and a fourth neutralization pipe 18 are connected between the neutralization kettle 12 and the second buffer tank 13. A fifth neutralization pipe 19 is connected to the second buffer tank 13. A third neutralization pump 20 and a fourth neutralization pump 21 are arranged in parallel on the fifth neutralization pipe 19. The fifth neutralization pipe 19 is connected to an external alcohol removal mechanism.

[0045] In this Embodiment 5, the first neutralization pump 15 and the second neutralization pump 16 are used to pump the liquid phase in the first buffer tank 11 to the neutralization kettle 12, and the third neutralization pump 20 and the fourth neutralization pump 21 are used to pump the neutralized liquid phase in the second buffer tank 13 to the external alcohol removal mechanism. The first neutralization pump 15 and the second neutralization pump 16 are arranged in parallel, and the third neutralization pump 20 and the fourth neutralization pump 21 are arranged in parallel for the purpose that when one of the pumps in the parallel relationship is damaged, the other pump can still be used, avoiding the interruption of transportation.

[0046] Embodiment 6

[0047] As Figure 1 shown, a biodiesel acid-catalyzed reaction system provided by the present utility model includes a biodiesel production mechanism 32, and also includes a drying mechanism connected to the biodiesel production mechanism, a mixer 1 connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reaction kettle 2 connected to the mixer 1, a flash tank 3 connected to the deacidification reaction kettle 2, a methanol recovery mechanism respectively connected to the deacidification reaction kettle 2 and the flash tank 3 and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected to the flash tank 3.

[0048] The biodiesel purification mechanism includes a conveying mechanism connected to the flash tank 3 and connected to the drying mechanism and the mixer 1, and an acid neutralization mechanism connected to the drying mechanism and externally connected to an alcohol removal mechanism.

[0049] The drying mechanism includes a drying heat exchanger 33 connected to the biodiesel production mechanism 32, a drying heater 34 connected to the drying heat exchanger 33, and a vacuum drying tower 35 connected to the drying heater 34 and connected to the mixer 1; the conveying mechanism is connected to the drying heat exchanger 33, and the acid neutralization mechanism is connected to the drying heat exchanger 33.

[0050] This Embodiment 6 is based on Embodiment 2. In this Embodiment 6, the biodiesel mixture coming from the biodiesel production mechanism 32 is sequentially dried and dewatered in the drying heat exchanger, the drying heater and the vacuum drying tower according to the series connection sequence of the drying heat exchanger, the drying heater and the vacuum drying tower. In this way, water input into the deacidification reaction kettle 2 can be avoided, so that there is only the water generated by the reaction in the deacidification reaction kettle 2, reducing the content of acid water formed in the deacidification reaction kettle 2. A vacuum tube 45 is connected to the top of the vacuum drying tower 35, and the vacuum tube 45 is connected to an external vacuum pump.

[0051] Embodiment 7

[0052] As Figure 1As shown in the figure, a biodiesel acid-catalyzed reaction system provided by the present utility model includes a biodiesel production mechanism 32, and further includes a drying mechanism connected to the biodiesel production mechanism, a mixer 1 connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reaction kettle 2 connected to the mixer 1, a flash tank 3 connected to the deacidification reaction kettle 2, a methanol recovery mechanism respectively connected to the deacidification reaction kettle 2 and the flash tank 3 and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected to the flash tank 3.

[0053] The biodiesel purification mechanism includes a conveying mechanism connected to the flash tank 3 and connected to the drying mechanism and the mixer 1, and an acid neutralization mechanism connected to the drying mechanism and externally connected to a dealcoholization mechanism.

[0054] The drying mechanism includes a drying heat exchanger 33 connected to the biodiesel production mechanism 32, a drying heater 34 connected to the drying heat exchanger 33, and a vacuum drying tower 35 connected to the drying heater 34 and connected to the mixer 1; the conveying mechanism is connected to the drying heat exchanger 33, and the acid neutralization mechanism is connected to the drying heat exchanger 33.

[0055] A first pipe 36 is connected between the biodiesel production mechanism 32 and the drying heat exchanger 33, a third valve 37 is provided on the first pipe 36, a second pipe 38 is connected between the drying heat exchanger 33 and the drying heater 34, a third pipe 39 is connected between the drying heater 34 and the vacuum drying tower 35, and a fourth pipe 40 is connected between the vacuum drying tower 35 and the mixer 1. A second pump 41 and a third pump 42 are arranged in parallel on the fourth pipe 40.

[0056] In Embodiment 7 of the present example, the third valve 37 is used to open and close the first pipe 36, and the second pump 41 and the third pump 42 are used to pump the biodiesel mixture in the vacuum drying tower 35 to the mixer.

[0057] Embodiment 8

[0058] As Figure 1 As shown in the figure, a biodiesel acid-catalyzed reaction system provided by the present utility model includes a biodiesel production mechanism 32, and further includes a drying mechanism connected to the biodiesel production mechanism, a mixer 1 connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reaction kettle 2 connected to the mixer 1, a flash tank 3 connected to the deacidification reaction kettle 2, a methanol recovery mechanism respectively connected to the deacidification reaction kettle 2 and the flash tank 3 and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected to the flash tank 3.

[0059] The methanol recovery mechanism includes a wastewater collection tank 22 connected to the acid reduction reaction kettle 2, a methanol concentration tower 23 respectively connected to the wastewater collection tank 22 and the flash tank 3, a methanol delivery pipe 24 connected to the methanol concentration tower 23 and connected to the biodiesel production mechanism, and a condensation mechanism connected to the methanol delivery pipe 24 and connected to the top of the methanol concentration tower 23; a fifth pipe 43 connected to the wastewater collection tank 22 and communicating with an external acidification tank is provided, a fourth pump 44 is provided on the fifth pipe 43, a first valve 25 and a first pump 26 are successively provided on the methanol delivery pipe 24 along its delivery direction, and the condensation mechanism is connected between the first valve 25 and the first pump 26.

[0060] In this Embodiment 8, the first valve 25 is used to open and close the methanol delivery pipe 24. After the gas phase separated in the flash tank 3 is delivered into the methanol concentration tower 23, the methanol concentration tower 23 extracts and concentrates methanol. The condensation mechanism is used to condense the tail gas generated by the methanol concentration tower 23 to recover methanol in the tail gas. The first pump 26 is used to pump the methanol concentrated in the methanol concentration tower 23 and the methanol condensed by the condensation mechanism to the biodiesel production mechanism 32. A wastewater pipe 49 is connected to the bottom of the methanol concentration tower 23, the wastewater pipe 49 is connected to the fifth pipe 43, and the wastewater pipe 49 is used to deliver the wastewater in the methanol concentration tower 23 to the fifth pipe 43 and then discharge it to the external acidification tank through the fifth pipe 43.

[0061] Embodiment 9

[0062] As Figure 1 shown, a biodiesel acid process reaction system provided by the present utility model includes a biodiesel production mechanism 32, and also includes a drying mechanism connected to the biodiesel production mechanism, a mixer 1 connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, an acid reduction reaction kettle 2 connected to the mixer 1, a flash tank 3 connected to the acid reduction reaction kettle 2, a methanol recovery mechanism respectively connected to the acid reduction reaction kettle 2 and the flash tank 3 and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected to the flash tank 3.

[0063] The methanol recovery mechanism includes a wastewater collection tank 22 connected to the acid reduction reaction kettle 2, a methanol concentration tower 23 respectively connected to the wastewater collection tank 22 and the flash tank 3, a methanol delivery pipe 24 connected to the methanol concentration tower 23 and connected to the biodiesel production mechanism, and a condensation mechanism connected to the methanol delivery pipe 24 and connected to the top of the methanol concentration tower 23; a fifth pipe 43 connected to the wastewater collection tank 22 and communicating with an external acidification tank is provided, a fourth pump 44 is provided on the fifth pipe 43, a first valve 25 and a first pump 26 are successively provided on the methanol delivery pipe 24 along its delivery direction, and the condensation mechanism is connected between the first valve 25 and the first pump 26.

[0064] The condensation mechanism includes a secondary delivery pipe 27 that is connected to and extends from the methanol concentration tower 23 and is connected to the methanol delivery pipe 24, and a primary condenser 28, a secondary condenser 29, and a condensation collection tank 30 that are sequentially arranged on the secondary delivery pipe 27 along the delivery direction of the secondary delivery pipe 27; a second valve 31 is provided on the secondary delivery pipe 27 between the condensation collection tank 30 and the methanol delivery pipe 24.

[0065] In this Embodiment 9, the primary condenser 28 and the secondary condenser 29 are used to condense the tail gas of the methanol concentration tower 23, and the condensation collection tank 30 is used to collect the condensed methanol. The second valve 31 is used to open and close the secondary delivery pipe 27.

[0066] An external pipe 46 and an external pipe 47 are connected to the mixer. The external pipe 46 is connected to an external sulfuric acid source, and the external pipe 47 is connected to an external methanol source. A sixth pipe 53 is connected between the acid reduction reactor 2 and the flash tank 3, and a sixth valve 54 is provided on the sixth pipe 53. A seventh pipe 55 is connected between the flash tank 3 and the methanol concentration tower, and an eighth pipe 56 is connected between the wastewater collection kettle and the methanol concentration tower. A second wastewater pipe 50 is connected between the acid reduction reactor 2 and the wastewater collection kettle 22, and a second wastewater valve 51 is provided on the second wastewater pipe 50.

[0067] The mixer 1, acid reduction reactor 2, flash tank 3, transfer pump 1 6, transfer pump 2 7, transfer valve 1 8, transfer valve 2 9, neutralization reactor 12, neutralization pump 1 15, neutralization pump 2 16, neutralization pump 3 20, neutralization pump 4 21, wastewater collection reactor 22, methanol concentration tower 23, first valve 25, first pump 26, primary condenser 28, secondary condenser 29, second valve 31, drying heat exchanger 33, drying heater 34, third valve 37, second pump 41, third pump 42, and fourth pump 44 used in the present utility model are all existing known electrical equipment and can be directly purchased and used in the market. Regarding the structures, circuits, and control principles of the mixer 1, acid reduction reactor 2, flash tank 3, transfer pump 1 6, transfer pump 2 7, transfer valve 1 8, transfer valve 2 9, neutralization reactor 12, neutralization pump 1 15, neutralization pump 2 16, neutralization pump 3 20, neutralization pump 4 21, wastewater collection reactor 22, methanol concentration tower 23, first valve 25, first pump 26, primary condenser 28, secondary condenser 29, second valve 31, drying heat exchanger 33, drying heater 34, third valve 37, second pump 41, third pump 42, and fourth pump 44, they are all existing known technologies. Therefore, the structures, circuits, and control principles of the mixer 1, acid reduction reactor 2, flash tank 3, transfer pump 1 6, transfer pump 2 7, transfer valve 1 8, transfer valve 2 9, neutralization reactor 12, neutralization pump 1 15, neutralization pump 2 16, neutralization pump 3 20, neutralization pump 4 21, wastewater collection reactor 22, methanol concentration tower 23, first valve 25, first pump 26, primary condenser 28, secondary condenser 29, second valve 31, drying heat exchanger 33, drying heater 34, third valve 37, second pump 41, third pump 42, and fourth pump 44 will not be elaborated herein again.

[0068] Finally, it should be noted that the above embodiments are only the preferred embodiments of the present utility model to illustrate the technical solutions of the present utility model, rather than limiting it, and certainly not limiting the patent scope of the present utility model; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model; that is to say, any meaningless changes or touch-ups made in the main design concept and spirit of the present utility model, as long as the technical problems solved are still the same as those of the present utility model, should be included in the protection scope of the present utility model; in addition, directly or indirectly applying the technical solutions of the present utility model to other related technical fields shall similarly be included in the patent protection scope of the present utility model.

Claims

1. A biological diesel acid reaction system, comprising a biological diesel production mechanism (32), characterized in that, It further includes a drying mechanism connected to the biodiesel production mechanism (32), a mixer (1) connected to the drying mechanism and externally connected to a methanol source and a sulfuric acid source, a deacidification reactor (2) connected to the mixer (1), a flash tank (3) connected to the deacidification reactor (2), a methanol recovery mechanism respectively connected to the deacidification reactor (2) and the flash tank (3) and connected to the biodiesel production mechanism, and a biodiesel purification mechanism connected to the flash tank (3).

2. The biodiesel acid-catalyzed reaction system according to claim 1, wherein The biodiesel purification mechanism includes a conveying mechanism connected to the flash tank (3) and connected to the drying mechanism and the mixer (1), and an acid neutralization mechanism connected to the drying mechanism and externally connected to a dealcoholization mechanism.

3. A biodiesel acid-catalyzed reaction system according to claim 2, characterized in that, The conveying mechanism includes a conveying main pipe (4) connected to the bottom of the flash tank (3), a conveying branch pipe (5) connected to the conveying main pipe (4) and connected to the mixer (1) at one end and the drying mechanism at the other end, and a first conveying pump (6) and a second conveying pump (7) arranged in parallel on the conveying main pipe (4); a first conveying valve (8) is provided at the end of the conveying branch pipe (5) input to the mixer (1), and a second conveying valve (9) is provided at the other end input to the drying mechanism.

4. A biological diesel acid-catalyzed reaction system according to claim 2, characterized in that, The acid neutralization mechanism includes a first neutralization pipe (10) connected to the drying mechanism, a first buffer tank (11) connected to the first neutralization pipe (10), a neutralization kettle (12) connected to the first buffer tank (11) and connected to an external alkaline methanol source, and a second buffer tank (13) connected to the neutralization kettle (12) and connected to an external dealcoholization mechanism.

5. A biological diesel acid reaction system according to claim 4, characterized in that, A second neutralization pipe (14) is connected between the first buffer tank (11) and the neutralization kettle (12), a first neutralization pump (15) and a second neutralization pump (16) are arranged in parallel on the second neutralization pipe (14), a third neutralization pipe (17) and a fourth neutralization pipe (18) are connected between the neutralization kettle (12) and the second buffer tank (13), a fifth neutralization pipe (19) is connected to the second buffer tank (13), a third neutralization pump (20) and a fourth neutralization pump (21) are arranged in parallel on the fifth neutralization pipe (19), and the fifth neutralization pipe (19) is connected to an external dealcoholization mechanism.

6. A biodiesel acid-catalyzed reaction system according to claim 2, wherein, The drying mechanism includes a drying heat exchanger (33) connected to the biodiesel production mechanism (32), a drying heater (34) connected to the drying heat exchanger (33), and a vacuum drying tower (35) connected to the drying heater (34) and connected to the mixer (1); the conveying mechanism is connected to the drying heat exchanger (33), and the acid neutralization mechanism is connected to the drying heat exchanger (33).

7. A biological diesel acid reaction system according to claim 6, wherein A first pipe (36) is connected between the biodiesel production mechanism (32) and the drying heat exchanger (33), a third valve (37) is provided on the first pipe (36), a second pipe (38) is connected between the drying heat exchanger (33) and the drying heater (34), a third pipe (39) is connected between the drying heater (34) and the vacuum drying tower (35), a fourth pipe (40) is connected between the vacuum drying tower (35) and the mixer (1), and a second pump (41) and a third pump (42) are arranged in parallel on the fourth pipe (40).

8. A biodiesel acid-catalyzed reaction system according to claim 1, characterized in that, The methanol recovery mechanism includes a wastewater collection kettle (22) connected from the acid reduction reaction kettle (2), a methanol concentration tower (23) respectively connected from the wastewater collection kettle (22) and the flash tank (3), a methanol delivery pipe (24) connected from the methanol concentration tower (23) and connected to the biodiesel production mechanism, and a condensation mechanism connected from the top of the methanol concentration tower (23) and connected to the methanol delivery pipe (24); a fifth pipe (43) communicating with an external acidification pond is connected to the wastewater collection kettle (22), a fourth pump (44) is provided on the fifth pipe (43), a first valve (25) and a first pump (26) are successively provided on the methanol delivery pipe (24) along its delivery direction, and the condensation mechanism is connected between the first valve (25) and the first pump (26).

9. The biodiesel acid-catalyzed reaction system according to claim 8, wherein The condensation mechanism includes a secondary delivery pipe (27) connected from the methanol concentration tower (23) and connected to the methanol delivery pipe (24), and a primary condenser (28), a secondary condenser (29) and a condensation collection tank (30) successively provided on the secondary delivery pipe (27) along the delivery direction of the secondary delivery pipe (27); a second valve (31) is provided on the secondary delivery pipe (27) between the condensation collection tank (30) and the methanol delivery pipe (24).

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