CN115738327A - Biodiesel methanol continuous recovery device - Google Patents

Biodiesel methanol continuous recovery device Download PDF

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Publication number
CN115738327A
CN115738327A CN202211439523.7A CN202211439523A CN115738327A CN 115738327 A CN115738327 A CN 115738327A CN 202211439523 A CN202211439523 A CN 202211439523A CN 115738327 A CN115738327 A CN 115738327A
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CN
China
Prior art keywords
methanol
methanol distillation
tower
pipeline
distillation tower
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CN202211439523.7A
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Chinese (zh)
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叶活动
罗敏健
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LONGYAN ZHUOYUE NEW ENERGY DEVELOPMENT CO LTD
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LONGYAN ZHUOYUE NEW ENERGY DEVELOPMENT CO LTD
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Priority to CN202211439523.7A priority Critical patent/CN115738327A/en
Publication of CN115738327A publication Critical patent/CN115738327A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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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  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The invention discloses a biodiesel methanol continuous recovery device, which comprises three methanol distillation towers with fillers, two methanol distillation kettles with steam coils, three coolers, three reflux pumps, two discharge pumps and a receiving tank, wherein the methanol distillation towers are internally provided with steam coils; the feed inlet of the No. 1 methanol distillation tower is connected with the reaction kettle through a pipeline, the gas outlet of each methanol distillation tower is connected to a receiving tank after being connected with a cooler through a pipeline, and the outlet of the receiving tank is connected back to each methanol distillation tower through a reflux pump; no. 1 and No. 2 methyl alcohol distillation tower bottom outlet connect No. 1 methyl alcohol stills, no. 3 methyl alcohol distillation tower bottom outlet connects No. 2 methyl alcohol stills, connects the discharge pump between two methyl alcohol stills, and No. 2 methyl alcohol stills bottom outlet connects the discharge pump. The method for continuously recovering the methanol has the characteristics of high production efficiency, convenient operation, high methanol recovery rate and good quality of the recovered methanol.

Description

Biodiesel methanol continuous recovery device
Technical Field
The invention relates to the technical field of biodiesel production devices, in particular to a device for recovering methanol when biodiesel is produced by taking waste oil as a raw material.
Background
In domestic biodiesel production, waste oil is mainly used as a raw material, and the waste oil mainly comprises free fatty acid, triglyceride, water impurity and the like. Generally, the method comprises the steps of heating, precipitating, separating and the like to remove water impurities from waste oil, and then producing biodiesel through a chemical reaction, namely, free fatty acid in the waste oil reacts with methanol to generate biodiesel and water, the water is taken out from reaction equipment along with excessive methanol gas and is condensed into dilute methanol through a cooler, and the methanol content in the dilute methanol is lower and cannot meet the production and use requirements of the biodiesel, so that the methanol content needs to be improved through a distillation purification mode. The existing methanol distillation recovery device mainly has two defects, one is that the methanol distillation recovery method is an intermittent method, the distillation recovery efficiency is low, and the operation is complicated; secondly, the water content in the methanol recovered by distillation and purification is higher, and the conversion rate of the biodiesel is influenced when the methanol is used for producing the biodiesel.
Disclosure of Invention
The invention aims to provide a continuous recovery device for biodiesel methanol, which has the advantages of high production efficiency, convenient operation, high methanol recovery rate and good quality.
In order to realize the aim, the continuous recovery device of the biodiesel methanol comprises a methanol distillation tower 1 No. 1, a methanol distillation tower 2 No. 2, a methanol distillation tower 3 No. 3, a methanol distillation kettle 4 No. 1, a methanol distillation kettle 5 No. 2, a cooler 6 No. 1, a cooler 7 No. 2, a cooler 8 No. 3, a reflux pump 9 No. 1, a reflux pump 10 No. 2, a reflux pump 11 No. 3, a discharge pump 12 No. 1, a discharge pump 13 No. 2 and a receiving tank 14; the gas outlet a of the No. 1 methanol distillation tower at the top of the No. 1 methanol distillation tower 1 is connected with an inlet pipeline of the No. 1 cooler 6, the gas inlet b of the No. 1 methanol distillation tower is connected with a reaction kettle through a pipeline, a filler is arranged in the No. 1 methanol distillation tower 1 and used for separating methanol and water, the bottom of the tower is provided with a No. 1 methanol distillation tower outlet c which is connected with an inlet m pipeline of the No. 1 methanol distillation tower, and the side edge of the upper part of the tower is provided with a No. 1 methanol distillation tower reflux port d which is connected with an outlet pipeline of the No. 1 reflux pump 9; the methanol distillation tower 2 is internally provided with a filler for separating methanol and water, the outlet f of the methanol distillation tower 2 at the bottom of the tower is connected with the inlet n of the methanol distillation kettle 1 through a pipeline, the air inlet g of the methanol distillation tower 2 arranged on the side edge of the lower part of the tower is connected with the air outlet o of the methanol distillation kettle 1 through a pipeline, the reflux port h of the methanol distillation tower 2 arranged on the side edge of the upper part of the tower is connected with the outlet pipeline of the reflux pump 10 2, and the air outlet e of the methanol distillation tower 2 arranged on the top of the tower is connected with the inlet pipeline of the cooler 7 2; the 3 # methanol distillation tower 3 is internally provided with a filler for separating methanol and water, the 3 # methanol distillation tower outlet j arranged at the bottom of the tower is connected with the inlet t pipeline of the 2 # methanol distillation kettle, the 3 # methanol distillation tower air inlet k arranged at the side edge of the lower part of the tower is connected with the air outlet u pipeline of the 2 # methanol distillation kettle, the 3 # methanol distillation tower reflux port l arranged at the side edge of the upper part of the tower is connected with the outlet pipeline of the 3 # reflux pump 11, and the 3 # methanol distillation tower air outlet i arranged at the top of the tower is connected with the inlet pipeline of the 3 # cooler 8; a steam coil is arranged in each of the methanol distillation still No. 1 and the methanol distillation still No. 2, and is used for heating and gasifying methanol water; the discharge ports of the No. 1 cooler 6, the No. 2 cooler 7 and the No. 3 cooler 8 are respectively connected with a feed port pipeline at the top of the methanol receiving tank 14, and the lower part of the methanol receiving tank 14 is provided with a discharge port which is respectively connected with inlet pipelines of the No. 1 reflux pump 9, the No. 2 reflux pump 10 and the No. 3 reflux pump 11; an inlet of the No. 1 discharging pump 12 is connected with a No. 1 methanol distillation kettle discharge port r pipeline arranged at the kettle bottom, and an outlet of the No. 1 discharging pump 12 is connected with a No. 2 methanol distillation kettle feed port s pipeline; and a water outlet x of a No. 2 methanol distillation kettle arranged at the bottom of the kettle is connected with an inlet pipeline of a No. 2 discharging pump 13.
The continuous recovery device for the biodiesel methanol has the following technical characteristics and beneficial effects:
(1) The continuous recovery of methanol in the production process of the biodiesel is realized, and the recovery rate of the methanol is improved;
(2) The methanol content after continuous distillation and purification is high, the quality of the recovered methanol is good, and the production of biodiesel is facilitated;
(3) The continuous recovery of the methanol is beneficial to automatic control, the production efficiency is improved, and the production cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a biodiesel methanol continuous recovery device of the present invention.
FIG. 2 is a schematic view of the structure of the methanol distillation column No. 1 in FIG. 1.
FIG. 3 is a schematic view of the structure of methanol distillation column No. 2 in FIG. 1.
FIG. 4 is a schematic view of the structure of methanol distillation column No. 3 in FIG. 1.
FIG. 5 is a schematic diagram of the structure of methanol distillation still No. 1 in FIG. 1.
FIG. 6 is a schematic diagram of the structure of methanol distillation still No. 2 in FIG. 1.
Reference numerals: no. 1 methanol distillation tower 1, no. 2 methanol distillation tower 2, no. 3 methanol distillation tower 3, no. 1 methanol distillation still 4, no. 2 methanol distillation still 5, no. 1 cooler 6, no. 2 cooler 7, no. 3 cooler 8, no. 1 reflux pump 9, no. 2 reflux pump 10, no. 3 reflux pump 11, no. 1 discharge pump 12, no. 2 discharge pump 13, receiving tank 14, no. 1 methanol distillation tower gas outlet a, no. 1 methanol distillation tower gas inlet b, no. 1 methanol distillation tower outlet c, no. 1 methanol distillation tower reflux outlet d, no. 2 methanol distillation tower gas outlet e, no. 2 methanol distillation tower outlet f, no. 2 methanol distillation tower gas inlet g, no. 2 methanol distillation tower reflux outlet h, no. 3 methanol distillation tower gas outlet i, no. 3 methanol distillation tower outlet j, no. 3 methanol distillation tower gas inlet k, no. 3 methanol distillation tower reflux outlet l, no. 1 methanol distillation still inlet m, no. 1 methanol distillation inlet n, no. 1 methanol distillation tower gas outlet o, no. 1 methanol distillation steam distillation still inlet p, no. 1 methanol distillation still outlet, no. 2 methanol distillation still outlet q, no. 2 methanol distillation still outlet, no. 2 methanol distillation still x, methanol distillation kettle outlet, methanol distillation still outlet, no. 2 methanol condensation water outlet, no. 2 methanol distillation still x, methanol distillation still outlet, methanol distillation kettle discharge outlet, methanol distillation kettle w.
Detailed Description
The continuous recovery device of biodiesel methanol is further described in detail with reference to the accompanying drawings and the specific embodiments.
As shown in fig. 1-6, the continuous recovery device for biodiesel methanol comprises a methanol distillation tower 1 of No. 1, a methanol distillation tower 2 of No. 2, a methanol distillation tower 3 of No. 3, a methanol distillation still 4 of No. 1, a methanol distillation still 5 of No. 2, a cooler 6 of No. 1, a cooler 7 of No. 2, a cooler 8 of No. 3, a reflux pump 9 of No. 1, a reflux pump 10 of No. 2, a reflux pump 11 of No. 3, a discharge pump 12 of No. 1, a discharge pump 13 of No. 2, and a receiving tank 14; the gas outlet a of the No. 1 methanol distillation tower at the top of the No. 1 methanol distillation tower 1 is connected with an inlet pipeline of the No. 1 cooler 6, the gas inlet b of the No. 1 methanol distillation tower is connected with a reaction kettle through a pipeline, a filler is arranged in the No. 1 methanol distillation tower 1 and used for separating methanol and water, the bottom of the tower is provided with a No. 1 methanol distillation tower outlet c which is connected with an inlet m pipeline of the No. 1 methanol distillation tower, and the side edge of the upper part of the tower is provided with a No. 1 methanol distillation tower reflux port d which is connected with an outlet pipeline of the No. 1 reflux pump 9; the methanol distillation tower 2 is internally provided with a filler for separating methanol and water, the outlet f of the methanol distillation tower 2 at the bottom of the tower is connected with the inlet n of the methanol distillation kettle 1 through a pipeline, the air inlet g of the methanol distillation tower 2 arranged on the side edge of the lower part of the tower is connected with the air outlet o of the methanol distillation kettle 1 through a pipeline, the reflux port h of the methanol distillation tower 2 arranged on the side edge of the upper part of the tower is connected with the outlet pipeline of the reflux pump 10 2, and the air outlet e of the methanol distillation tower 2 arranged on the top of the tower is connected with the inlet pipeline of the cooler 7 2; the 3 # methanol distillation tower 3 is internally provided with a filler for separating methanol and water, the 3 # methanol distillation tower outlet j arranged at the bottom of the tower is connected with the inlet t pipeline of the 2 # methanol distillation kettle, the 3 # methanol distillation tower air inlet k arranged at the side edge of the lower part of the tower is connected with the air outlet u pipeline of the 2 # methanol distillation kettle, the 3 # methanol distillation tower reflux port l arranged at the side edge of the upper part of the tower is connected with the outlet pipeline of the 3 # reflux pump 11, and the 3 # methanol distillation tower air outlet i arranged at the top of the tower is connected with the inlet pipeline of the 3 # cooler 8; a steam coil is arranged in each of the methanol distillation still No. 1 and the methanol distillation still No. 2, and is used for heating and gasifying methanol water; discharge ports of a cooler No. 1 6, a cooler No. 2 and a cooler No. 3 are respectively connected with a feed port pipeline at the top of a methanol receiving tank 14, and a discharge port is arranged at the lower part of the methanol receiving tank 14 and is respectively connected with inlet pipelines of a reflux pump No. 1 9, a reflux pump No. 2 10 and a reflux pump No. 3 11; an inlet of the No. 1 discharging pump 12 is connected with a discharge port r of a No. 1 methanol distillation kettle arranged at the bottom of the kettle through a pipeline, and an outlet of the No. 1 discharging pump 12 is connected with a feed port s of a No. 2 methanol distillation kettle through a pipeline; and a water outlet x of a No. 2 methanol distillation kettle arranged at the bottom of the kettle is connected with an inlet pipeline of a No. 2 discharging pump 13.
The specific operation flow of the biodiesel methanol continuous recovery device during operation is as follows:
in a reaction device, free fatty acid in waste oil and fat and excessive methanol are subjected to esterification reaction to generate biodiesel and water, the methanol and water vapor are led out from the reaction device and then enter a No. 1 methanol distillation tower from an air inlet b of the No. 1 methanol distillation tower 1 on the lower side, meanwhile, a No. 1 reflux pump 9 is used for pumping out the methanol in a receiving tank 14 and enter the tower from a No. 1 methanol distillation tower reflux port d on the upper side of the No. 1 methanol distillation tower 1, the temperature of the methanol gas phase above the No. 1 methanol distillation tower 1 is controlled, the purified methanol gas is led out from an air outlet a of the No. 1 methanol distillation tower arranged on the top of the tower, and is cooled into methanol liquid by a No. 1 cooler 6 and then enters the receiving tank 14 for storage; part of methanol water is discharged from an outlet c of a No. 1 methanol distillation tower arranged at the bottom of the tower and enters a No. 1 methanol distillation kettle 4, steam in the No. 1 methanol distillation kettle 4 is opened, the methanol water is vaporized again through a steam coil in the No. 1 methanol distillation kettle 4, the vaporized methanol water vapor is led out from an outlet o of the No. 1 distillation kettle arranged at the upper part and enters the tower from an air inlet g of a No. 2 methanol distillation tower arranged at the lower side of the No. 2 methanol distillation tower 2, meanwhile, methanol in a receiving tank 14 is pumped out by a No. 2 reflux pump 10 and enters the tower from a reflux port h of the No. 2 methanol distillation tower arranged at the upper side of the No. 2 methanol distillation tower 2, the gas phase temperature of the methanol at the upper part in the tower is controlled, the purified methanol gas is led out from an air outlet e of the No. 2 methanol distillation tower arranged at the top of the tower, cooled into methanol liquid by a No. 2 cooler 7 and then enters the receiving tank 14 for storage, and dilute methanol in the methanol distillation process is discharged from an outlet f of the No. 2 methanol distillation tower arranged at the bottom of the No. 2 methanol distillation tower and enters the No. 1 methanol distillation kettle 4; dilute methanol in the methanol distillation kettle No. 14 is pumped out by a discharge pump No. 1 12 and enters a methanol distillation kettle No. 2 to continuously purify methanol; the steam in the No. 2 methanol distillation kettle 5 is opened, dilute methanol is heated and gasified again, gasified methanol steam is led out from a No. 2 methanol distillation kettle gas outlet u and then enters the tower from a No. 3 methanol distillation tower gas inlet k arranged on the side edge of the lower part of the tower, meanwhile, methanol in a receiving tank 14 is pumped out by a No. 3 reflux pump 11 and enters the tower from a No. 3 methanol distillation tower reflux inlet l arranged on the side edge of the upper part of the tower, the gas phase temperature of the methanol above the No. 3 methanol distillation tower 3 is controlled, purified methanol is led out from a No. 3 methanol distillation tower gas outlet i arranged on the top of the tower, the purified methanol is cooled into methanol liquid by a No. 3 cooler 8 and then enters the receiving tank 14 for storage, and residual wastewater in the No. 2 methanol distillation kettle 5 is pumped out from a bottom discharge hole by a No. 2 discharge pump 13.

Claims (1)

1. A biodiesel methanol continuous recovery device is characterized in that: the device comprises a methanol distillation tower (1) No. 1, a methanol distillation tower (2) No. 2, a methanol distillation tower (3) No. 3, a methanol distillation kettle (4) No. 1, a methanol distillation kettle (5) No. 2, a cooler (6) No. 1, a cooler (7) No. 2, a cooler (8) No. 3, a reflux pump (9) No. 1, a reflux pump (10) No. 2, a reflux pump (11) No. 3, a discharge pump (12) No. 1, a discharge pump (13) No. 2 and a receiving tank (14); the gas outlet (a) of the No. 1 methanol distillation tower at the top of the No. 1 methanol distillation tower (1) is connected with an inlet pipeline of a No. 1 cooler (6), the gas inlet (b) of the No. 1 methanol distillation tower is connected with a reaction kettle through a pipeline, a filler is arranged in the No. 1 methanol distillation tower (1) and used for separating methanol and water, the bottom of the tower is provided with a No. 1 methanol distillation tower outlet (c) which is connected with a No. 1 methanol distillation kettle inlet (m) through a pipeline, and the side edge of the upper part of the tower is provided with a No. 1 methanol distillation tower reflux port (d) which is connected with an outlet pipeline of a No. 1 reflux pump (9); a filler is arranged in the No. 2 methanol distillation tower (2) and used for separating methanol and water, the No. 2 methanol distillation tower outlet (f) at the bottom of the tower is connected with the No. 1 methanol distillation kettle inlet (n) through a pipeline, the No. 2 methanol distillation tower air inlet (g) arranged on the side edge of the lower part of the tower is connected with the No. 1 methanol distillation kettle air outlet (o) through a pipeline, the No. 2 methanol distillation tower reflux port (h) arranged on the side edge of the upper part of the tower is connected with an outlet pipeline of the No. 2 reflux pump (10), and the No. 2 methanol distillation tower air outlet (e) arranged on the top of the tower is connected with an inlet pipeline of the No. 2 cooler (7); a filler is arranged in a No. 3 methanol distillation tower (3) and is used for separating methanol and water, an outlet (j) of the No. 3 methanol distillation tower arranged at the bottom of the tower is connected with an inlet (t) of a No. 2 methanol distillation kettle through a pipeline, an air inlet (k) of the No. 3 methanol distillation tower arranged at the side edge of the lower part of the tower is connected with an air outlet (u) of the No. 2 methanol distillation kettle through a pipeline, a reflux port (l) of the No. 3 methanol distillation tower arranged at the side edge of the upper part of the tower is connected with an outlet pipeline of a No. 3 reflux pump (11), and an air outlet (i) of the No. 3 methanol distillation tower arranged at the top of the tower is connected with an inlet pipeline of a No. 3 cooler (8); steam coil pipes are arranged in the methanol distillation kettle No. 1 (4) and the methanol distillation kettle No. 2 (5) and are used for heating and gasifying methanol water; discharge ports of a cooler No. 1 (6), a cooler No. 2 (7) and a cooler No. 3 (8) are respectively connected with a feed port pipeline at the top of a methanol receiving tank (14), and a discharge port is arranged at the lower part of the methanol receiving tank (14) and is respectively connected with inlet pipelines of a reflux pump No. 1 (9), a reflux pump No. 2 (10) and a reflux pump No. 3 (11); an inlet of the No. 1 discharging pump (12) is connected with a discharge port (r) of a No. 1 methanol distillation kettle arranged at the bottom of the kettle through a pipeline, and an outlet of the No. 1 discharging pump (12) is connected with a feed port(s) of a No. 2 methanol distillation kettle through a pipeline; a water outlet (x) of a No. 2 methanol distillation kettle arranged at the bottom of the kettle is connected with an inlet pipeline of a No. 2 discharging pump (13).
CN202211439523.7A 2022-11-17 2022-11-17 Biodiesel methanol continuous recovery device Pending CN115738327A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211439523.7A CN115738327A (en) 2022-11-17 2022-11-17 Biodiesel methanol continuous recovery device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211439523.7A CN115738327A (en) 2022-11-17 2022-11-17 Biodiesel methanol continuous recovery device

Publications (1)

Publication Number Publication Date
CN115738327A true CN115738327A (en) 2023-03-07

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ID=85372537

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211439523.7A Pending CN115738327A (en) 2022-11-17 2022-11-17 Biodiesel methanol continuous recovery device

Country Status (1)

Country Link
CN (1) CN115738327A (en)

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