CN109705977B

CN109705977B - Propelling supercritical grease extracting device

Info

Publication number: CN109705977B
Application number: CN201711013189.8A
Authority: CN
Inventors: 牛鹏飞; 苏肖洁; 仇农学; 郭玉蓉; 邓红; 孟永宏; 李林强
Original assignee: Shaanxi Normal University
Current assignee: Shaanxi Normal University
Priority date: 2017-10-26
Filing date: 2017-10-26
Publication date: 2023-01-03
Anticipated expiration: 2037-10-26
Also published as: CN109705977A

Abstract

The advanced supercritical grease extracting apparatus has support, water bath barrel on the support, extracting kettle inside the water bath barrel, top cover on the kettle mouth, extracting agent pipe communicated to the extracting kettle through the water bath barrel, filter bag set in the liquid conveying pipe, sealing sleeve between the liquid conveying pipe and the extracting kettle, liquid conveying pipe advancing mechanism on the liquid conveying pipe, and liquid outlet pipe set in the other end of the liquid conveying pipe. The invention has the advantages of simple structure, high extraction efficiency and convenient operation.

Description

Push type supercritical grease extraction device

Technical Field

The invention belongs to a physical separation device or equipment, and particularly relates to a device for extracting grease.

Background

A supercritical fluid is a fluid that, when a gas is pressurized in a state above its critical temperature and critical pressure, the gas does not liquefy but has an increased density, has liquid-like properties, and retains the properties of a gas. The supercritical fluid has the advantages of gas and liquid, the density is close to liquid, the dissolving capacity is strong, the viscosity is close to gas, the diffusion coefficient is far larger than that of common liquid, and the mass transfer is facilitated. In addition, the supercritical fluid has zero surface tension and easily permeates and diffuses into micropores of an extracted substance. Therefore, the supercritical fluid has good dissolution and mass transfer characteristics, can quickly reach mass transfer balance with the extract, and realizes effective separation of substances.

The supercritical extraction technology is one of the main directions of grease extraction in the future. From the current literature reports, the oil extraction process has various characteristics of environmental protection, low cost, easy realization and the like, and is even adopted and applied by part of oil production enterprises and used for producing high-end oil. However, this technology has not been widely used to date for decades as it has emerged. Under the traditional supercritical extraction process, the flow direction of an extractant extends along an extraction kettle from bottom to top, an extractant inlet is positioned at the bottom of the extraction kettle, and an extractant outlet is positioned on a cover at the top of the extraction kettle or positioned on the side surface of the upper end of the extraction kettle. Although many literature studies report the influence of the improvement of the supercritical extraction process, including the extraction pressure, extraction temperature, carbon dioxide flow rate, extraction time and other factors on the extraction yield, it is difficult to improve the "chronic" problem of low production efficiency in the supercritical extraction of oil and fat.

The Chinese patent name 'a method for rapidly extracting grease by supercritical extraction', patent number 201410030959X, when an extracting agent flows through an extraction kettle from top to bottom, the extracting agent extraction effect and the squeezing effect of the extracting agent can be exerted, the extraction efficiency can be greatly improved, but when the extracting agent flows through the extraction kettle from top to bottom, an outlet pipeline is easy to block, the extracting agent is easy to enter and difficult to exit when a material cake filter cake layer is thick, materials on the top are difficult to extract, and the extraction efficiency is low.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the existing supercritical extraction device and provide a push type supercritical oil extraction device which has the advantages of reasonable design, simple structure, high extraction efficiency and convenient operation.

The technical scheme for solving the technical problems is as follows: the support is provided with a water bath barrel, the inside of the water bath barrel is provided with an extraction kettle, the port of the extraction kettle is provided with a top cover, an extractant tube passes through the water bath barrel and is communicated with the extraction kettle, one end of a perfusion tube provided with a filter bag sequentially passes through the support, the bottom of the extraction kettle extends into the extraction kettle, a sealing sleeve is arranged between the perfusion tube and the bottom of the extraction kettle, a perfusion tube propelling mechanism is arranged on the perfusion tube, and the other end of the perfusion tube is provided with a liquid outlet tube.

As a preferred technical scheme, the bottom of the extraction kettle is provided with a gland for fixing a sealing sleeve.

As a preferred technical scheme, the infusion tube propelling mechanism consists of a support and a nut, the nut and the support are sequentially sleeved on the infusion tube, the support is fixedly arranged on a support, the nut abuts against the inner surface of the support, threads are arranged on the outer side wall of the infusion tube, and the nut is in threaded connection with the infusion tube.

As a preferable technical scheme, a handle is arranged on the nut.

As a preferred technical scheme, the support is a circular supporting plate, a through hole is formed in the center of the supporting plate, and 3 supporting legs are uniformly distributed on the supporting plate along the circumferential direction.

As a preferred technical scheme, a thermometer is arranged on the top cover.

As a preferred technical scheme, the filter bag is characterized in that a filter element is filled between an inner layer and an outer layer, filter holes are formed in the inner layer and the outer layer, and the filter element is absorbent cotton.

As a preferred technical scheme, the filter bag is a spherical body or a cone or a combination body with the top part being a cone and the bottom part being a cylinder.

As a preferred technical scheme, a pressure gauge is arranged on the extractant tube.

The invention has the following beneficial effects:

the invention adopts the structure that one end of a liquid conveying pipe connected with a filter bag sequentially passes through the bottom of a water bath barrel and the bottom of an extraction kettle and extends into the extraction kettle, a sealing sleeve is arranged between the liquid conveying pipe and the bottom of the extraction kettle, an extraction solution enters the liquid conveying pipe through the filter bag and is output through a liquid outlet pipe, a nut and a bracket sequentially pass through the liquid conveying pipe, the bracket is arranged at the bottom of a support, threads are processed on the outer side wall of the liquid conveying pipe, the nut is in threaded connection with the liquid conveying pipe, the height of the filter bag is adjusted through the nut, oil is extracted from bottom to top, and the oil extraction efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a partially enlarged view of a in fig. 1.

Detailed Description

The present invention will be described in further detail below with reference to the drawings and examples, but the present invention is not limited to the embodiments described below.

In the figures 1 and 2, the push type supercritical grease extraction device is formed by connecting a thermometer 1, a top cover 2, an extraction kettle 3, a water bath barrel 4, a water outlet pipe 5, a filter bag 6, a sealing sleeve 7, a gland 8, a support 9, a support 10, a nut 11, a liquid conveying pipe 12, a liquid outlet pipe 13, a handle 14, a water inlet pipe 15, an extractant pipe 16 and a pressure gauge 17.

A water bath barrel 4 is arranged on a support 9, the water bath barrel 4 is a tubular body with a hollow side wall, water is filled in the side wall, a water inlet pipe 15 communicated with the side wall of the water bath barrel is arranged at the lower end of the side wall of the water bath barrel, a water outlet pipe 5 communicated with the side wall of the water bath barrel is arranged at the upper end of the side wall of the water bath barrel, an extraction kettle 3 is arranged in the water bath barrel, extracted oil is filled in the extraction kettle 3, the water bath barrel 4 is used for providing proper extraction temperature for the extraction kettle 3, a pressure gauge 17 is arranged on an extractant pipe 16, the extractant pipe 16 passes through the water bath barrel 4 and is communicated with the extraction kettle 3, a top cover 2 is connected on the extraction kettle 3 through screw threads, a groove is processed on the top cover 2 to facilitate the installation or disassembly of the top cover, a thermometer 1 is arranged on the top cover 2 and is used for measuring the temperature in the extraction kettle 3, one end of a transfusion pipe 12 is connected with a filter bag 6, the other end of the filter bag is connected with a liquid outlet pipe 13 through screw threads, the geometric shape of the filter bag 6 is a sphere, or a cone or a combination body with the top part being a cone and the bottom part being a cylinder, the filter bag 6 is structured in such a way that a filter element 6-2 is filled between an inner layer 6-3 and an outer layer 6-1, filter holes are uniformly distributed on the inner layer 6-3 and the outer layer 6-1, the filter element 6-2 is absorbent cotton, the other end of a liquid conveying pipe 12 sequentially passes through the bottom part of the extraction kettle, a support and extends to the lower part of the support, one end of the liquid conveying pipe 12 connected with the filter bag 6 is positioned in the extraction kettle, a sealing sleeve 7 is arranged between the liquid conveying pipe 12 and the bottom part of the extraction kettle, an extraction solution enters the liquid conveying pipe 1 through the filter bag 6 and is output through a liquid outlet pipe 13, a gland 8 is sleeved on the liquid conveying pipe 1 and is arranged at the outer bottom part of the extraction kettle through threads, the gland 8 is used for fixing the sealing sleeve 7, a nut 11 and a support 10 are sequentially sleeved on the liquid conveying pipe, and the support 10 is structured in such a way that a through hole is processed at the center of a circular support plate, 3 landing legs along circumferencial direction evenly distributed on the layer board, the landing leg of support 10 passes through the fix with screw at the support lower surface, nut 11 is near the internal surface at the support layer board, it has the screw to process on the transfer line 12 lateral wall, nut 11 and transfer line 12 threaded connection, install handle 14 on the nut 11, in the extraction process, after extraction cauldron bottom oil has extracted, because oil and oil cake dregs cake filter cake layer tightly wrap up transfer line 12, it makes transfer line 12 rebound to rotate nut 11 through handheld handle 14, extract the middle level oil in charging barrel 11, be favorable to improving extraction efficiency.

The working principle of the invention is as follows:

firstly, the length of the infusion tube 12 extending into the extraction kettle 3 is adjusted to ensure that the filter bag 6 is close to the bottom in the extraction kettle 3, then the extraction kettle 3 is filled with the extracted oil, supercritical carbon dioxide is input into the extraction kettle 3 through the extractant tube 16, the thermometer 1 is observed in real time, the temperature of water in the water bath barrel 4 is adjusted to ensure that the temperature of the water bath barrel 4 is the optimal extraction temperature, along with the extraction, the extraction solution mixed with oil enters the infusion tube 12 through the filter bag 6, flows out from the liquid outlet tube 13 at the end part of the infusion tube 12, filter residue without oil is gradually formed at the kettle bottom and continuously rises to submerge the filter crusty pancake 6, when the oil cake filter cake layer at the bottom of the extraction kettle is thick, and when the oil cake extraction efficiency is observed to be reduced at the liquid outlet tube, the nut 11 is rotated by holding the handle 14 by hand to enable the infusion tube 12 to move upwards to extract the middle-layer material in the extraction kettle 3, and when the oil cake filter cake layer of the extraction kettle is thick, the infusion tube 12 is continuously adjusted upwards until the extraction kettle is completely extracted.

Claims

1. A propulsion type supercritical grease extraction device is characterized in that: a water bath barrel is arranged on the support, an extraction kettle is arranged in the water bath barrel, a top cover is arranged on the kettle mouth of the extraction kettle, an extractant tube passes through the water bath barrel and is communicated with the extraction kettle, one end of a perfusion tube provided with a filter bag sequentially passes through the support and the bottom of the extraction kettle and extends into the extraction kettle, a seal sleeve is arranged between the perfusion tube and the bottom of the extraction kettle, a perfusion tube propelling mechanism is arranged on the perfusion tube, a drain tube is arranged at the other end of the perfusion tube, the perfusion tube propelling mechanism is composed of a support and a nut, the nut and the support are sequentially sleeved on the perfusion tube, the support is fixedly arranged on the support, the nut abuts against the inner surface of the support, threads are arranged on the outer side wall of the perfusion tube, and the nut is in threaded connection with the perfusion tube;

the filter bag is characterized in that a filter element is filled between an inner layer and an outer layer, filter holes are formed in the inner layer and the outer layer, and the filter element is absorbent cotton; the filter bag is a spherical body or a cone or a combination body with the top part being a cone and the bottom part being a cylinder;

the extraction kettle is filled with the oil to be extracted, the filter bag is close to the bottom in the extraction kettle, and in the extraction process, after the oil at the bottom of the extraction kettle is extracted, the infusion tube is tightly wrapped by the oil and the oil cake filter cake layer, and the infusion tube is moved upwards by rotating the nut through the handle, so that the oil at the middle layer in the charging tube is extracted; when the layer of the oil cake and the cake filter in the extraction kettle is thicker, the infusion pipe is continuously adjusted upwards until the material in the extraction kettle is completely extracted.

2. The propelled supercritical fluid extraction apparatus of claim 1 wherein: and a gland for fixing the sealing sleeve is arranged at the bottom of the extraction kettle.

3. The propelling supercritical oil and fat extraction device according to claim 1, characterized in that: the nut is provided with a handle.

4. The propelling supercritical oil and fat extraction device according to claim 1, characterized in that: the support be circular layer board center processing have the through-hole, along the circumferencial direction evenly distributed has 3 landing legs on the layer board.

5. The propelling supercritical oil and fat extraction device according to claim 1, characterized in that: the top cover is provided with a thermometer.

6. The propelled supercritical fluid extraction apparatus of claim 1 wherein: the extractant pipe is provided with a pressure gauge.