CN212051293U

CN212051293U - Device for producing biodiesel by continuous ester exchange of waste oil and fat

Info

Publication number: CN212051293U
Application number: CN202020373823.XU
Authority: CN
Inventors: 叶活动; 罗敏健; 曾庆平
Original assignee: LONGYAN ZHUOYUE NEW ENERGY DEVELOPMENT CO LTD
Current assignee: LONGYAN ZHUOYUE NEW ENERGY DEVELOPMENT CO LTD
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-12-01
Anticipated expiration: 2030-03-23

Abstract

The utility model discloses a device for producing biodiesel by continuous ester exchange of waste oil, which comprises a 1# reaction kettle, a 1# precipitation kettle, a 2# reaction kettle and a 2# precipitation kettle which are connected in sequence by pipelines; the No. 1 reaction kettle is provided with a waste oil inlet, a catalyst inlet and a methanol inlet; catalyst feeding distribution discs, heating coils, stirring devices and temperature measuring ports are arranged in the two reaction kettles, and material passing ports are arranged at the bottoms of the two reaction kettles; the bottoms of the two settling kettles are both provided with a densimeter for automatic measurement and a glycerin outlet; the No. 2 reaction kettle is provided with a catalyst replenishing feed inlet; the side surface of the upper part of the 2# precipitation kettle is provided with a feed inlet which is connected with a feed passing port pipeline of the 2# reaction kettle, the other side surface of the 2# precipitation kettle is provided with a biodiesel outlet, and the middle upper part in the kettle is provided with a middle partition plate, so that the materials flow in a U shape in the 2# precipitation kettle to be beneficial to the separation and discharge of glycerol and biodiesel. The utility model has the characteristics of small investment, high automation level, good product quality and stability, low production cost and high conversion rate.

Description

Device for producing biodiesel by continuous ester exchange of waste oil and fat

Technical Field

The utility model relates to a production facility for producing biodiesel by using waste oil, in particular to a device for producing biodiesel by continuous ester exchange of waste oil.

Background

The domestic biodiesel production mainly takes waste oil as a raw material, and the waste oil is a mixture mainly composed of free fatty acid and glyceride besides impurities such as water, silt and the like. After the waste oil is purified, free fatty acid is generally converted into biodiesel and water by an esterification reaction, and after the water generated by the reaction is separated, glyceride is converted into biodiesel and glycerol by an ester exchange reaction. The device for producing biodiesel by ester exchange mainly comprises a reaction kettle and a reaction tower, and has the following problems: the reaction kettle method is used for producing biodiesel intermittently, and has the problems of high labor intensity, unstable quality and the like; the reaction tower method uses high-temperature and high-pressure equipment, and has large investment, high energy consumption and high operation requirement.

Disclosure of Invention

The utility model aims at providing a little investment, automatic level height, product quality and stability are good, low in production cost, the high device of biodiesel is produced in the continuous ester interchange of waste oil fat that the conversion rate is high.

In order to realize the purpose, the device for producing biodiesel by continuously performing ester exchange on waste oil comprises a 1# reaction kettle, a 1# precipitation kettle, a 2# reaction kettle, a 2# precipitation kettle and a connecting pipeline; the top of the No. 1 reaction kettle is provided with a waste oil inlet a, a No. 1 reaction kettle methanol inlet b and a No. 1 reaction kettle catalyst inlet c, the side surface of the No. 1 reaction kettle is provided with a No. 1 reaction kettle steam inlet g, a No. 1 reaction kettle steam condensate outlet d and a No. 1 reaction kettle temperature measuring port f, and the bottom of the No. 1 reaction kettle is provided with a No. 1 reaction kettle material passing port e; the reactor is internally provided with a catalyst feeding distribution disc, a heating coil and a stirring device, the catalyst distribution disc is beneficial to uniformly adding a catalyst into the reaction kettle so as to reduce the occurrence of side reactions, the heating coil is used for adjusting the temperature in the 1# reaction kettle to be in accordance with a set value by introducing steam so as to ensure that the ester exchange reaction is smoothly carried out, and the stirring device is beneficial to fully reacting waste oil and methanol under the action of the catalyst; the side surface of the upper part of the 1# precipitation kettle is provided with a 1# precipitation kettle feed port h which is connected with a 1# reaction kettle feed port e through a pipeline, the bottom of the 1# precipitation kettle is provided with an automatic measurement densimeter and a 1# precipitation kettle glycerol outlet i, and the side surface of the bottom of the 1# precipitation kettle is provided with a 1# precipitation kettle feed port j; the side surface of the upper part of the 2# reaction kettle is provided with a 2# reaction kettle feed port l which is connected with a 1# precipitation kettle feed port j through a pipeline, the top of the 2# reaction kettle is provided with a 2# reaction kettle catalyst feed port k, the bottom of the 2# reaction kettle is provided with a 2# reaction kettle feed port n, the side surface of the 2# reaction kettle is provided with a 2# reaction kettle steam inlet p, a 2# reaction kettle steam condensate outlet m and a 2# reaction kettle temperature measuring port o, and the kettle is internally provided with a catalyst feed distribution disc, a steam coil; 2# reation kettle's upper portion side is equipped with 2# precipitation cauldron feed inlet q and 2# reation kettle material passing hole n pipe connection, and another side is equipped with biodiesel export s, and automatic measuring densimeter is equipped with to the bottom and 2# precipitation cauldron glycerine export r is equipped with, and upper middle portion is equipped with intermediate bottom in the cauldron, makes the material be the U type in 2# precipitation cauldron and flows, is favorable to glycerine and biodiesel separation and discharge.

The device for producing biodiesel by the continuous ester exchange of waste oil and fat has the following technical characteristics and beneficial effects:

the continuous feeding and discharging are realized, the automatic control is facilitated, the production efficiency is high, and the stability of the production quality is ensured;

compared with a reaction kettle (batch method), the reaction kettle has the characteristics of simple operation and low labor intensity; compared with a high-temperature high-pressure reaction tower, the method has the advantage of low cost;

and glycerin is continuously and automatically discharged in the production process, so that the biodiesel is favorably generated, and the conversion rate of ester exchange reaction is improved.

Fourthly, the investment is low and the maintenance cost is low.

Drawings

FIG. 1 is a schematic structural diagram of a device for producing biodiesel by continuous transesterification of waste oil and fat.

FIG. 2 is an enlarged schematic view of the reaction vessel No. 1 in FIG. 1.

FIG. 3 is an enlarged schematic view of the 1# precipitation tank in FIG. 1.

FIG. 4 is an enlarged schematic view of the 2# reaction vessel in FIG. 1.

FIG. 5 is an enlarged schematic view of the 2# precipitation tank in FIG. 1.

Reference numerals: 1

# reaction kettle

1, 1#

precipitation kettle

2, 2

# reaction kettle

3, 2# precipitation kettle 4, densimeter 5, intermediate bottom 6, waste oil inlet a, 1# reaction kettle methanol inlet b, 1# reaction kettle catalyst inlet c, 1# reaction kettle steam condensate outlet d, 1# reaction kettle material passing port e, 1# reaction kettle temperature measuring port f, 1# reaction kettle steam inlet g, 1# precipitation kettle material inlet h, 1# precipitation kettle glycerin outlet i, 1# precipitation kettle material passing port j, 2# reaction kettle catalyst inlet k, 2# reaction kettle material inlet l, 2# reaction kettle steam condensate outlet m, 2# reaction kettle material outlet n, 2# reaction kettle temperature measuring port o, 2# reaction kettle steam inlet p, 2# precipitation kettle material inlet q, 2# precipitation kettle glycerin outlet r and 2# precipitation kettle material outlet s.

Detailed Description

The following describes the apparatus for producing biodiesel by continuous transesterification of waste oils and fats according to the present invention in detail with reference to the accompanying drawings and embodiments.

As shown in fig. 1-5, the device for producing biodiesel by continuous transesterification of waste oil and fat of the present invention comprises a # 1 reaction kettle 1, a # 1 precipitation kettle 2, a # 2 reaction kettle 3, a # 2 precipitation kettle 4 and a connecting pipeline; the top of the No. 1 reaction kettle 1 is provided with a waste oil inlet a, a No. 1 reaction kettle methanol inlet b and a No. 1 reaction kettle catalyst inlet c, the side surface is provided with a No. 1 reaction kettle steam inlet g, a No. 1 reaction kettle steam condensate outlet d and a No. 1 reaction kettle temperature measuring port f, and the bottom is provided with a No. 1 reaction kettle material passing port e; the reactor is internally provided with a catalyst feeding distribution disc, a heating coil and a stirring device, the catalyst distribution disc is beneficial to uniformly adding a catalyst into the reaction kettle so as to reduce the occurrence of side reactions, the heating coil is used for adjusting the temperature in the 1# reaction kettle 1 to be in accordance with a set value by introducing steam so as to ensure that the ester exchange reaction is smoothly carried out, and the stirring device is beneficial to fully reacting waste oil and methanol under the action of the catalyst; the side surface of the upper part of the 1# precipitation kettle 2 is provided with a 1# precipitation kettle feed port h which is connected with a 1# reaction kettle 1 feed port e through a pipeline, the bottom of the 1# precipitation kettle 2 is provided with an automatic measurement densimeter 5 and a 1# precipitation kettle glycerol outlet i, the glycerol is precipitated at the bottom of the 1# precipitation kettle 2 due to high density, when the density reaches a set value, the glycerol is discharged from the 1# precipitation kettle glycerol outlet i through an automatic opening valve, and the side surface of the bottom of the 1# precipitation kettle 2 is provided with a 1# precipitation kettle feed port j; the side surface of the upper part of the 2# reaction kettle 3 is provided with a 2# reaction kettle feed inlet l which is connected with a 1# precipitation kettle feed inlet j through a pipeline, the top of the 2# reaction kettle is provided with a 2# reaction kettle catalyst feed inlet k, the bottom of the 2# reaction kettle feed inlet n is provided with a 2# reaction kettle feed inlet p, a 2# reaction kettle steam condensate outlet m and a 2# reaction kettle temperature measuring port o, the kettle is internally provided with a catalyst feed distribution disc, a steam coil pipe and a stirring device, and the action of the stirring device is the same as that of the 1# reaction kettle 1; since a portion of the catalyst was lost when the glycerin was discharged from the bottom of the 1# settling tank 2, the catalyst was replenished in the 2# reaction tank 3. 2# precipitation cauldron 4's upper portion side is equipped with 2# precipitation cauldron feed inlet q and 2# reation kettle material passing hole n pipe connection, another side is equipped with biodiesel export s, the bottom is equipped with automatic measure's densimeter and is equipped with 2# precipitation cauldron glycerine export r, when density reaches the setting value, through automatic opening valve, make 2# precipitation cauldron glycerine discharge from r, biodiesel then discharges from biodiesel export s, upper portion is equipped with intermediate bottom in the cauldron, it flows to make the material be the U type in 2# precipitation cauldron 4, be favorable to glycerine and biodiesel separation and discharge.

When the device is used, in order to ensure that waste oil, methanol, catalyst and biodiesel and glycerin generated in the reaction in the 1# reaction kettle 1 can smoothly flow into the 1# precipitation kettle 2, then automatically flow into the 2# reaction kettle 3, and finally automatically flow into the 2# precipitation kettle 4, the liquid level of the 1# reaction kettle 1 is required to be 0.3-0.5 meter higher than the liquid level of the 1# precipitation kettle 2, the liquid level of the 1# precipitation kettle 2 is required to be 0.3-0.5 meter higher than the liquid level of the 2# reaction kettle 3, and the liquid level of the 2# reaction kettle 3 is required to be 0.3-0.5 meter higher than the liquid level of the 2# precipitation kettle 4, so that a sufficient and reasonable liquid level difference between adjacent kettles is ensured.

The specific operation flow during production is as follows: feeding the waste oil, methanol and catalyst generated after the water separation in the esterification reaction into a No. 1 reaction kettle 1, starting stirring, introducing steam into a heating coil, reacting at a certain temperature, then enabling the materials to automatically flow into a No. 1 precipitation kettle 2 from the bottom of the No. 1 reaction kettle 1, and automatically discharging glycerin generated in the reaction through a densimeter at the bottom of the No. 1 precipitation kettle 2 so as to break the original ester exchange reaction balance and promote the reaction to proceed towards the direction of generating biodiesel; the material automatically flows into the No. 2 reaction kettle 3 from the bottom side surface of the No. 1 precipitation kettle 2, and because partial catalyst can be lost when the No. 1 precipitation kettle 2 discharges the glycerol, the catalyst needs to be supplemented in the No. 2 reaction kettle 3, and the reaction is continued under stirring; when the temperature does not meet the requirement, steam can be introduced into the heating coil to adjust the temperature to meet the set value; the material after the reaction automatically flows into the 2# settling kettle 4 from the bottom of the 2# reaction kettle 3 for settling separation, the glycerin is automatically discharged from the bottom of the 2# settling kettle 4 through the density meter, and the biodiesel flows out from the side surface of the upper part of the 2# settling kettle 4.

Claims

1. A device for producing biodiesel by continuous ester exchange of waste oil and fat is characterized in that: the device comprises a No. 1 reaction kettle, a No. 1 precipitation kettle, a No. 2 reaction kettle, a No. 2 precipitation kettle and a connecting pipeline; the top of the No. 1 reaction kettle is provided with a waste oil inlet a, a No. 1 reaction kettle methanol inlet b and a No. 1 reaction kettle catalyst inlet c, the side surface of the No. 1 reaction kettle is provided with a No. 1 reaction kettle steam inlet g, a No. 1 reaction kettle steam condensate outlet d and a No. 1 reaction kettle temperature measuring port f, and the bottom of the No. 1 reaction kettle is provided with a No. 1 reaction kettle material passing port e; the reactor is internally provided with a catalyst feeding distribution disc, a heating coil and a stirring device, the catalyst distribution disc is beneficial to uniformly adding a catalyst into the reaction kettle so as to reduce the occurrence of side reactions, the heating coil is used for adjusting the temperature in the 1# reaction kettle to be in accordance with a set value by introducing steam so as to ensure that the ester exchange reaction is smoothly carried out, and the stirring device is beneficial to fully reacting waste oil and methanol under the action of the catalyst; the side surface of the upper part of the 1# precipitation kettle is provided with a 1# precipitation kettle feed port h which is connected with a 1# reaction kettle feed port e through a pipeline, the bottom of the 1# precipitation kettle is provided with an automatic measurement densimeter and a 1# precipitation kettle glycerol outlet i, and the side surface of the bottom of the 1# precipitation kettle is provided with a 1# precipitation kettle feed port j; the side surface of the upper part of the 2# reaction kettle is provided with a 2# reaction kettle feed port l which is connected with a 1# precipitation kettle feed port j through a pipeline, the top of the 2# reaction kettle is provided with a 2# reaction kettle catalyst feed port k, the bottom of the 2# reaction kettle is provided with a 2# reaction kettle feed port n, the side surface of the 2# reaction kettle is provided with a 2# reaction kettle steam inlet p, a 2# reaction kettle steam condensate outlet m and a 2# reaction kettle temperature measuring port o, and the kettle is internally provided with a catalyst feed distribution disc, a steam coil; 2# reation kettle's upper portion side is equipped with 2# precipitation cauldron feed inlet q and 2# reation kettle material passing hole n pipe connection, and another side is equipped with biodiesel export s, and automatic measuring densimeter is equipped with to the bottom and 2# precipitation cauldron glycerine export r is equipped with, and upper middle portion is equipped with intermediate bottom in the cauldron, makes the material be the U type in 2# precipitation cauldron and flows, is favorable to glycerine and biodiesel separation and discharge.