CN211837976U

CN211837976U - Biodiesel reduced pressure distillation experimental device

Info

Publication number: CN211837976U
Application number: CN201921977586.1U
Authority: CN
Inventors: 叶活动; 陈建文
Original assignee: XIAMEN ZHUOYUE BIOMASS ENERGY CO Ltd
Current assignee: XIAMEN ZHUOYUE BIOMASS ENERGY CO Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-11-03
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a biodiesel reduced pressure distillation experimental device, which comprises a vaporization center device, a round bottom distillation flask, a digital display constant temperature electric heating jacket, a lifting platform, a condenser pipe, a distillate receiving bottle, a buffer bottle, a vacuum meter and a laboratory high vacuum pump; the vaporization center device comprises a stainless steel pipe, a stainless steel capillary pipe, a stainless steel straight-through joint, a thermocouple temperature sensor and a rubber plug, wherein a silica gel pad is arranged in one end of the stainless steel straight-through joint, the stainless steel capillary pipe is inserted from a center hole of an upper screw cap, penetrates through the center of the silica gel pad and extends out, and the other end of the stainless steel capillary pipe is connected with the stainless steel pipe through a clamping sleeve and a lower screw cap; the stainless steel tube and the thermocouple temperature sensor are respectively inserted into a rubber plug penetrating through the mouth of the distillation flask, the rubber plug is plugged into the straight port of the round-bottom distillation flask and is compressed, and the temperature sensor is connected with a signal line of a digital display constant temperature electric heating jacket. The utility model provides a appear exploding easily and boil the phenomenon and seriously influence the problem of experiment when prior art vacuum distillation experiment.

Description

Biodiesel reduced pressure distillation experimental device

Technical Field

The utility model relates to a liquid material distillation plant, concretely relates to biodiesel vacuum distillation experimental apparatus.

Background

The biodiesel oil is prepared by using waste animal and vegetable oil as raw oil, reacting the waste animal and vegetable oil with methanol under certain conditions to generate crude ester of fatty acid methyl ester, and then carrying out reduced pressure distillation to obtain a pure biodiesel oil finished product. When evaluating the quality of raw oil, besides detecting various basic indexes, the method is mainly used for simulating production to carry out experiments, and the final link of the experiments is a reduced pressure distillation experiment. Due to the characteristics of the crude biodiesel, even zeolite cannot generate uniform steam bubbles even if no vaporization gas source is arranged in the distillation flask in the distillation process, so that the bumping phenomenon can occur, and the performance of a reduced pressure distillation experiment is seriously influenced.

Disclosure of Invention

The utility model aims at providing a preparation and maintenance cost are low, use safe and reliable, convenient operation efficient biodiesel reduced pressure distillation experimental apparatus, appear bumping phenomenon easily and seriously influence the problem of experiment normal clear when solving prior art reduced pressure distillation experiment.

Research and experiments show that the method for generating bubbles by utilizing the gas flow rate provided by the capillary can solve the problems in the prior art. If a capillary made of glass is selected, the capillary is inserted from a vacuum plug of a distillation bottle opening and is close to the bottle bottom, and an inert gas source such as nitrogen is connected to the outside of the capillary, the defect that one glass capillary needs to be replaced in each experiment, the glass capillary is easy to break in the experiment process, and the experiment is forced to be interrupted.

In order to realize the purpose, the utility model discloses biodiesel reduced pressure distillation experimental apparatus includes vaporization center device, round bottom distillation flask, digital display constant temperature electric jacket, elevating platform, condenser pipe, distillate receiving flask, buffer flask, vacuometer and laboratory high vacuum pump; the vaporization center device comprises a stainless steel pipe, a stainless steel capillary, a stainless steel through joint, a thermocouple temperature sensor and a rubber plug, wherein a silica gel pad is arranged in one end of the stainless steel through joint, the stainless steel capillary is inserted from a center hole of an upper screw cap, penetrates through the center position of the silica gel pad and extends out, and the other end of the stainless steel through joint is connected with the stainless steel pipe through a clamping sleeve and a lower screw cap; the stainless steel tube and the thermocouple temperature sensor are respectively inserted into a rubber plug penetrating through a distillation flask opening, the rubber plug is plugged into the straight opening of the round-bottom distillation flask and is tightly pressed, a probe at one end of the temperature sensor is positioned at the lower edge of a branch tube opening at the neck part of the distillation flask, and the other end of the temperature sensor is connected with a digital display constant temperature electric heating jacket signal line; the round bottom part of the round bottom distillation flask is placed in the digital display constant temperature electric heating jacket, and the tail end of the distillation flask branch pipe is tightly butted with the feed inlet of the condensing pipe by adjusting the height of the lifting platform; the discharge end of the condensation pipe is connected with a distillate receiving bottle through a rubber plug, and the distillate receiving bottle is connected with a buffer bottle through a vacuum hose; the buffer bottle is connected with a vacuum meter through a glass tube sleeve vacuum hose for one hole of a rubber plug of the buffer bottle, and is connected with a laboratory high-vacuum pump through a horizontal glass tube sleeve vacuum hose for the other hole of the rubber plug.

The stainless steel capillary tube is inserted through the silica gel pad and extends 5 mm.

The pipe diameter of the stainless steel pipe is 2mm, the rubber stopper of the distillation bottle mouth is inserted through and close to the bottle bottom, and the end part of the stainless steel pipe is 3mm away from the bottle bottom.

The utility model discloses biodiesel vacuum distillation experimental apparatus has following technical characterstic and beneficial effect:

1. by adopting the vaporization center device, in a reduced pressure distillation experiment, the stable capillary gas flow can be provided for oil product liquid materials in the distillation flask when the oil product liquid materials are heated and vaporized, so that vaporized material steam uniformly and stably rises to the discharge port of the distillation flask branch pipe and flows out of the discharge port, and a high-purity finished product is obtained through cooling.

2. Distillate is uniform and smooth in the whole distillation process, materials in the bottle are uniformly and stably vaporized through the vaporization center device, and the phenomenon of bumping cannot occur as the case without the vaporization center device; then, the reflux ratio is increased by adopting an inclined upward tail end necking mode through a branch pipe of the distillation flask, so that the crude ester is purified to obtain a pure biodiesel finished product, and the problem of bumping is solved without needing a long vertical reflux pipe like other types of distillation devices.

3. The capillary tube and the communicating tube of the vaporization center device are made of special stainless steel tubes, do not react with materials, can be repeatedly used, are convenient to disassemble, assemble, clean and maintain, save experimental time and improve working efficiency.

4. The whole device is low in manufacturing and maintenance cost, safe and reliable to use, and convenient and efficient to operate.

Drawings

FIG. 1 is a schematic structural diagram of the experimental device for reduced pressure distillation of biodiesel according to the present invention.

Fig. 2 is a schematic view of the vaporization center of fig. 1.

Reference numerals: the device comprises a stainless steel pipe 1, a stainless steel capillary pipe 1-1, a stainless steel straight joint 1-2, a thermocouple temperature sensor 1-3, a rubber plug 1-4, a round bottom distillation flask 2, a digital display constant temperature electric heating jacket 3, a lifting platform 4, a condensation pipe 5, a distillate receiving bottle 6, a buffer bottle 7, a vacuum gauge 8, a laboratory high vacuum pump 9, a vacuum hose a, a glass tube sleeve vacuum hose b and a horizontal glass tube sleeve vacuum hose c.

Detailed Description

The experimental device for reduced pressure distillation of biodiesel according to the present invention will be described in detail with reference to the following embodiments.

Fig. 1-fig. 2 show, the utility model discloses biodiesel reduced pressure distillation experimental apparatus includes vaporization center device, round bottom distillation flask 2, digital display constant temperature electric jacket 3, elevating platform 4, condenser pipe 5, distillate receiving flask 6, buffer flask 7, vacuum meter 8, laboratory high vacuum pump 9, the vaporization center device includes stainless steel pipe 1, stainless steel capillary 1-1, stainless steel straight-through joint 1-2, thermocouple temperature sensor 1-3, rubber buffer 1-4, and the relevant preparation of each part and relation of connection explain as follows:

the stainless steel capillary 1-1 can be made of waste micro sample injection needle tubes, so that the aim of comprehensive utilization of resources is fulfilled. If the air inflow of the needle tube of the micro-sampling needle is larger, one end of the needle tube can be slightly clamped by a clamp, so that the air inflow meets the vaporization requirement of reduced pressure distillation, namely continuous and stable bubbles can be generated, if the materials in the distillation flask still roll in a convection manner, the air inflow is still too large, and then a stainless steel capillary tube is continuously clamped until the proper air inflow is reached.

The stainless steel straight joint 1-2 can be made of a stainless steel gas path pipe straight joint commonly used in laboratories, when the straight joint is connected with one end of a stainless steel pipe with the diameter of 2mm, a conical stainless steel gasket is arranged in the straight joint, and when the straight joint is installed, a screw cap is screwed to tightly hold the stainless steel pipe, so that the purposes of sealing, pressure resistance and no gas leakage are achieved. The end connected with the stainless steel capillary tube does not need a conical stainless steel washer, but adopts a lining silica gel pad which is also a common pad used in laboratories, and the size of the silica gel pad can be just placed in the straight joint.

Stainless steel tube 1 leading to the bottom of the distillation flask was made using a 2mm stainless steel gas line tube commonly used in laboratories.

The diameter of the thermocouple temperature sensor 1-3 is not too large, and the length is enough to ensure that the thermocouple temperature sensor can extend into the lower edge of the joint of the bottle diameter of the distillation flask and the branch pipe through a rubber plug.

The rubber stopper 1-5 can be used for more than 2 months generally, whether the rubber stopper becomes soft and deteriorates or not should be checked before each distillation, otherwise, the rubber stopper should be replaced.

The vaporization center apparatus connection is described as follows:

1. one end of the stainless steel straight-through joint 1-2 is plugged into the silica gel pad, the screw cap is screwed in but not screwed, the stainless steel capillary tube 1-1 is inserted into the center position of the silica gel pad from the center hole of the screw cap until the stainless steel capillary tube passes through the silica gel pad by about 5mm, and then the screw cap is screwed.

2. The other end of the stainless steel straight-through joint 1-2 is connected with a stainless steel pipe 1 with the diameter of 2mm through a clamping sleeve and a screw cap, screwed and sealed until no air leakage occurs.

3. According to the sizes of the sleeves of the stainless steel tube 1 and the thermocouple temperature sensors 1-3, punching two holes on the rubber plugs 1-4 by using a puncher, respectively inserting the stainless steel tube 1 and the thermocouple temperature sensors 1-3 into corresponding holes of the rubber plugs to penetrate through the holes, and adjusting the proper positions. Thus, the vaporization center device is connected.

The utility model discloses biodiesel reduced pressure distillation experimental apparatus's erection joint and operation description are as follows:

1. and (5) checking whether each part is damaged or not and whether the parts can be normally used or not, and otherwise, carrying out an experiment after replacement.

2. Parts that are normally fixedly connected: buffer bottle 7, vacuum meter 8, the connection of laboratory high vacuum pump 9 three, buffer bottle 7 is connected with vacuum meter 8 through glass pipe sleeve vacuum hose b for a hole of rubber buffer, is connected with laboratory high vacuum pump 9 through horizontal glass pipe sleeve vacuum hose c for another hole of rubber buffer. One end of the vacuum hose a is connected to the buffer bottle 7, and the other end is connected to the other end of the vacuum hose a.

3. The distillate receiving bottle 6 is connected with the buffer bottle 7 through a vacuum hose a after being weighed and recorded, and the discharge end of the condensation pipe 5 is connected with the distillate receiving bottle 6 through a rubber plug; at this time, the tap is needed to be opened to check whether the condensate water is normal or not, and the flow of the condensate water is adjusted to be proper.

4. A round bottom distillation flask 2(500mL specification) is filled with 200mL of crude ester and weighed and recorded, the round bottom part is placed into a digital display constant temperature electric heating jacket 3(500mL specification), a rubber plug 1-4 of a reduced pressure distillation vaporization center device is plugged into the straight opening of the round bottom distillation flask 2 and slightly compressed, the position of a temperature sensor probe is adjusted at the lower edge of a branch pipe opening of the neck part of the distillation flask, then the height of a lifting platform 4 is adjusted, the tail end of the branch pipe of the round bottom distillation flask 2 is just aligned with a feed inlet of a condensation pipe 5, the position of the condensation pipe and the receiving bottle are slightly moved, and the tail end of the branch pipe of the distillation flask 2 is tightly butted with the feed inlet of.

5. And opening a nitrogen source switch leading to the reduced pressure distillation vaporization center device, opening a power switch of the digital display constant temperature electric heating jacket 3, adjusting a proper temperature rise rate, starting temperature rise, simultaneously opening a power switch of the high vacuum pump 9, and slowly adjusting the vacuum degree required by the experiment. Observing and recording experimental phenomena, such as whether the vacuum degree, the heating rate, the vaporization and the like are normal, and recording data such as initial boiling points, dry points and the like.

6. And (3) stopping operation specification after the experiment is ended: the power switch of the digital display constant temperature electric heating jacket 3 is firstly closed, the high vacuum pump 9 is kept running, when the residual steam in the round bottom distillation flask 2 falls back to the bottom, nitrogen is slowly opened to break the vacuum, the high vacuum pump 9 can be closed after the vacuum is broken, and the receiving bottle 6 in the device can be detached for weighing and recording after 5 minutes.

Claims

1. A biodiesel reduced pressure distillation experimental device comprises a vaporization center device, a round bottom distillation flask, a digital display constant temperature electric heating jacket, a lifting platform, a condenser pipe, a distillate receiving bottle, a buffer bottle, a vacuum meter and a laboratory high vacuum pump; the round bottom part of the round bottom distillation flask is placed in the digital display constant temperature electric heating jacket, and the tail end of the distillation flask branch pipe is tightly butted with the feed inlet of the condensing pipe by adjusting the height of the lifting platform; the discharge end of the condensation pipe is connected with a distillate receiving bottle through a rubber plug, and the distillate receiving bottle is connected with a buffer bottle through a vacuum hose; the buffer bottle is connected with a vacuum meter through a glass tube sleeve vacuum hose in one hole of a rubber plug of the buffer bottle, and is connected with a laboratory high vacuum pump through a horizontal glass tube sleeve vacuum hose in the other hole of the rubber plug; the method is characterized in that: the vaporization center device comprises a stainless steel pipe, a stainless steel capillary, a stainless steel through joint, a thermocouple temperature sensor and a rubber plug, wherein a silica gel pad is arranged in one end of the stainless steel through joint, the stainless steel capillary is inserted from a center hole of an upper screw cap, penetrates through the center position of the silica gel pad and extends out, and the other end of the stainless steel through joint is connected with the stainless steel pipe through a clamping sleeve and a lower screw cap; the stainless steel tube and the thermocouple temperature sensor are respectively inserted into the rubber plug penetrating through the mouth of the distillation flask, the rubber plug is plugged into the straight port of the round-bottom distillation flask and is compressed, the probe at one end of the temperature sensor is positioned at the lower edge of the branch pipe mouth of the neck part of the distillation flask, and the other end of the temperature sensor is connected with a digital display constant temperature electric heating jacket signal line.

2. The experimental device for the reduced pressure distillation of the biodiesel according to claim 1, which is characterized in that: the stainless steel capillary tube is inserted through the silica gel pad and extends 5 mm.

3. The experimental device for the reduced pressure distillation of the biodiesel according to claim 1, which is characterized in that: the pipe diameter of the stainless steel pipe is 2mm, the rubber stopper of the distillation bottle mouth is inserted through and close to the bottle bottom, and the end part of the stainless steel pipe is 3mm away from the bottle bottom.