Edible oil dewaxing and continuous crystal growing device

Abstract

The utility model relates to the technical field of edible oil equipment, in particular to an edible oil dewaxing and continuous crystal growing device which comprises an oil storage tank, and the output end of the oil storage tank is respectively communicated with an oil inlet of a high-concentration crystal growing system and an oil inlet of a low-concentration crystal growing system. And an oil outlet of the high-concentration crystal growing system and an oil outlet of the low-concentration crystal growing system are respectively communicated with the filtering tank through valves. After the oil in the high-concentration crystal growing system is firstly filtered, the filter aid in the high-concentration crystal growing system can be remained in the filtering tank, and the oil in the low-concentration crystal growing system is filtered by using the filter aid, so that the use amount and waste of the filter aid are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of edible oil equipment, in particular to an edible oil dewaxing and continuous crystal growing device. Background Art

[0002] The wax in edible oil comes from oil. Wax has a high melting point, poor solubility and is not easily absorbed. At low temperatures, it can also cause the edible oil to become turbid and solidify, affecting the appearance of the product. Dewaxing is an indispensable process in the production of edible oil. By dewaxing edible oil, the stability and high temperature resistance of edible oil can be improved, and the quality and taste of edible oil can also be improved. As people's requirements for the quality and taste of edible oil increase, dewaxing becomes more and more important in the production process of edible oil.

[0003] The current dewaxing process generally adopts a two-step method of crystallization and crystal growing. The patent with application number 202122731259.1 discloses a continuous crystallization and growing device for edible oil dewaxing. The output end of the oil feed pump is fixedly connected to the first temperature-controlled crystallization tank, and the lower end of the side wall of the first temperature-controlled crystallization tank is fixedly connected to the second temperature-controlled crystallization tank through a pipeline. The lower end of the side wall of the second temperature-controlled crystallization tank is fixedly connected to the temperature-controlled crystal growing tank through a pipeline, and the output end of the temperature-controlled crystal growing tank is fixedly connected to the filter oil pump, and the output end of the filter oil pump is fixedly connected to the centrifugal filter tank; the first temperature-controlled crystallization tank, the second temperature-controlled crystallization tank and the temperature-controlled crystal growing tank are connected in series through the feed port and the discharge port. The device connects the lower end of the first temperature-controlled crystallization tank with the upper end of the second crystallization tank. Since the outlet end of the first temperature-controlled crystallization tank is lower than the inlet end of the second temperature-controlled crystallization tank, the oil in the first temperature-controlled crystallization tank needs to use a lifting base to achieve a better overflow effect, and the device consumes a lot of energy. In addition, the device adopts a two-step dewaxing method of crystallization and crystal growing. The grains in the first temperature-controlled crystallization tank and the second temperature-controlled crystallization tank need to be mixed in the oil and transported to the temperature-controlled crystal growing tank through a pipeline with the oil. The grains are easy to gather in the pipeline to block the pipeline, and the dewaxing efficiency is difficult to guarantee. Utility Model Content

[0004] In view of the problem of low edible oil dewaxing efficiency in the prior art, the utility model provides an edible oil dewaxing continuous crystal growing device, which provides a high-concentration crystal growing system and a low-concentration crystal growing system, and connects the high-concentration crystal growing system and the low-concentration crystal growing system with a filter tank, and simultaneously processes edible oils containing filter aids of different concentrations, and saves the amount of filter aids by controlling the order in which the edible oils containing filter aids of different concentrations enter the filter tank.

[0005] The utility model provides an edible oil dewaxing continuous crystallization device, comprising an oil storage tank, wherein the output end of the oil storage tank is respectively connected to the oil inlet of a high-concentration crystallization system and the oil inlet of a low-concentration crystallization system, and the oil outlet of the high-concentration crystallization system and the oil outlet of the low-concentration crystallization system are respectively connected to a filter tank through a valve.

[0006] Furthermore, the high-concentration crystal-forming system includes a high-concentration premixing tank and a high-concentration crystal-forming tank group connected in series; the low-concentration crystal-forming tank system includes a low-concentration premixing tank and a low-concentration crystal-forming tank group connected in series. The high-concentration premixing tank and the low-concentration premixing tank are respectively provided with stirring devices to promote the mixing of edible oil and filter aid. The high-concentration premixing tank and the low-concentration premixing tank can also be provided with a heating device, which can make the wax precipitated in the edible oil dissolve again in the edible oil by heating, crystallize and grow in the crystal-forming tank group, and improve the effect of wax precipitation and crystallization.

[0007] Furthermore, the upper ends of the high-concentration premixing tank and the low-concentration premixing tank are respectively provided with oil inlets, and the lower ends of the high-concentration premixing tank and the low-concentration premixing tank are respectively provided with discharge ports.

[0008] Furthermore, the high-concentration premixing tank and the low-concentration premixing tank are respectively provided with filter aid inlets. A larger dose of filter aid enters the high-concentration premixing tank through the filter aid inlet provided on the high-concentration premixing tank, and is mixed with edible oil in the high-concentration premixing tank; a smaller dose of filter aid enters the low-concentration premixing tank through the filter aid inlet provided on the low-concentration premixing tank, and is mixed with edible oil in the low-concentration premixing tank. Preferably, the filter aid inlets are respectively provided at the upper end of the high-concentration premixing tank and the upper end of the low-concentration premixing tank.

[0009] Furthermore, the high-concentration crystallization tank group and the low-concentration crystallization tank group respectively include a plurality of crystallization tanks connected in series, a feed inlet is provided at the lower end of the side wall of the crystallization tank, and an oil outlet is provided at the upper end of the side wall of the crystallization tank. Adjacent crystallization tanks are connected in series by an oil guide pipe, and an insulation layer may be provided on the outside of the oil guide pipe. The edible oil to be dewaxed enters the crystallization tank from the feed inlet, and when the liquid level of the edible oil in the crystallization tank is higher than the oil outlet, the excess edible oil is discharged from the oil outlet, overflows through the oil guide pipe and enters the next crystallization tank.

[0010] Furthermore, a variable frequency motor is installed at the top of the crystal growing tank, and a stirring device is arranged inside the crystal growing tank, and the variable frequency motor is connected to the stirring device. The stirring device is preferably a stirring paddle, and the blades of the stirring paddle are arranged at equal intervals. The speed of the stirring paddle can be adjusted by the variable frequency motor to meet the different needs of crystallization and crystal growing.

[0011] Furthermore, the number of crystal growing tanks in the high-concentration crystal growing tank group and the low-concentration crystal growing tank group is greater than one.

[0012] Furthermore, a filter plate is provided inside the filter tank. The filter plate provided inside the filter tank is detachable, which helps to regularly clean the filter aids remaining on the filter plate. A small amount of filter aids can be placed on the filter plate in advance.

[0013] Further, the number of the filter tanks is greater than one. The filter tanks are connected to the valves, which is beneficial to improving the filtering efficiency.

[0014] Furthermore, oil inlet pumps are respectively arranged between the high-concentration premixing tank and the high-concentration crystal-growing tank group, and between the low-concentration premixing tank and the low-concentration crystal-growing tank group; oil outlet pumps are respectively arranged between the high-concentration crystal-growing tank group and the valve, and between the low-concentration crystal-growing tank group and the valve.

[0015] The beneficial effects of the utility model are:

[0016] The utility model sets a feed port at the lower end of the side wall of the crystal forming tank, and sets an oil outlet at the upper end of the side wall of the crystal forming tank. After the wax in the edible oil crystallizes, it will be deposited at the bottom of the crystal forming tank. The crystal grains formed by the wax are not easy to enter the oil guide pipe with the edible oil, which alleviates the problem of the crystal grains blocking the oil guide pipe. The utility model uses a valve to control the passage between the high-concentration crystal forming system and the low-concentration crystal forming system and the filter tank. After the oil in the high-concentration crystal forming system is filtered first, the filter aid in the high-concentration crystal forming system will remain on the filter plate. These filter aids are used to filter the oil in the low-concentration crystal forming system, so that the filter aids retained in the filter tank can be fully and effectively utilized, saving the use of the filter aid, improving the effect of crystal forming, reducing production costs, and reducing the pollution of the filter aid to the environment, with good economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the continuous crystallization device for edible oil dewaxing in Example 1.

[0019] In the figure, 1-oil storage tank, 2-high concentration premixing tank, 3-low concentration premixing tank, 4-high concentration oil inlet pump, 5-low concentration oil inlet pump, 6-high concentration crystallization tank group, 7-low concentration crystallization tank group, 8-low concentration filter oil pump, 9-valve, 10-high concentration filter oil pump. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] Example 1

[0022] A continuous crystallization device for dewaxing edible oil comprises an oil storage tank 1, wherein the output end of the oil storage tank 1 is connected to the oil inlet at the upper end of a high-concentration premixing tank 2 and the oil inlet at the upper end of a low-concentration premixing tank 3 by a branch pipeline. The upper end of the high-concentration premixing tank 2 and the upper end of the low-concentration premixing tank 3 are respectively provided with a filter aid inlet, a larger dose of diatomaceous earth enters the high-concentration premixing tank 2 through the filter aid inlet provided on the high-concentration premixing tank 2, and is mixed with edible oil in the high-concentration premixing tank 2 to obtain edible oil with a diatomaceous earth mass fraction of 1%; a smaller dose of diatomaceous earth enters the low-concentration premixing tank 3 through the filter aid inlet provided on the low-concentration premixing tank 3, and is mixed with edible oil in the low-concentration premixing tank 3 to obtain edible oil with a diatomaceous earth mass fraction of 0.1%. The high-concentration premixing tank 2 and the low-concentration premixing tank 3 are respectively provided with a stirring device and a heating device. The discharge port at the lower end of the high-concentration premixing tank 2 and the discharge port at the lower end of the low-concentration premixing tank 3 are respectively connected in series with the feed port of the high-concentration crystal tank group 6 and the feed port of the low-concentration crystal tank group 7 through corresponding pipelines. The high-concentration oil inlet pump 4 is connected to the corresponding pipeline between the high-concentration premixing tank 2 and the high-concentration crystal tank group 6, and the low-concentration oil inlet pump 5 is connected to the corresponding pipeline between the low-concentration premixing tank 3 and the low-concentration crystal tank group 7. The high-concentration crystal tank group 6 and the low-concentration crystal tank group 7 respectively include ten crystal tanks in series, the feed port is set at the lower end of the side wall of the crystal tank, and the oil outlet is set at the upper end of the side wall of the crystal tank. A variable frequency motor is installed at the top of the crystal tank, and a stirring paddle is set inside the crystal tank. The variable frequency motor is connected to the stirring paddle, and the blades of the stirring paddle are alternately large and arranged at equal intervals. Adjacent crystal tanks are connected in series with oil guide pipes, and an insulation layer is set on the outside of the oil guide pipes. The oil outlet of the high-concentration crystal tank group 6 and the oil outlet of the low-concentration crystal tank group 7 are connected to the two filter tanks through valves respectively, a high-concentration filter oil pump 10 is connected between the oil outlet of the high-concentration crystal tank group 6 and the valve 9, a low-concentration filter oil pump 8 is connected between the oil outlet of the low-concentration crystal tank group 7 and the valve 9, the filter tank is connected to the valve 9, a detachable filter plate is arranged inside the filter tank, a small amount of filter aid is placed on the filter plate in advance, and liquid level sensors are arranged on the outside of the two filter tanks for monitoring the liquid level of edible oil in the filter tank.

[0023] When dewaxing edible oil, a high-concentration oil inlet pump is used to pump the edible oil in the high-concentration premix tank into the high-concentration crystallization tank group for crystallization and crystallization, and a low-concentration oil inlet pump is used to pump the edible oil in the low-concentration premix tank into the low-concentration crystallization tank for crystallization and crystallization. After crystallization and crystallization are completed, a control valve is used to open the passage between the high-concentration crystallization tank group and the filter tank, and the edible oil from the high-concentration crystallization tank group is filtered by two filter tanks at the same time. During the filtering process, the filter aids in the edible oil containing high-concentration filter aids and the filter aids on the filter plate are unable to pass through the filter plate in the filter tank and are gathered on the filter plate. A liquid level sensor installed on the filter tank is used to monitor the liquid level of the edible oil in the filter tank. When the liquid level of the edible oil in the filter tank is lower than a preset value, the control valve closes the passage between the high-concentration crystallization tank group and the filter tank, and opens the passage between the low-concentration crystallization tank group and the filter tank. The filter tank is used to filter the edible oil from the low-concentration crystallization tank group. The concentration of the filter aid in the edible oil from the low-concentration crystallization tank group is not sufficient to effectively intercept particles such as wax crystals and impurities. However, after the edible oil enters the filter tank, the filter aid accumulated in the filter tank can work together with the filter aid in the edible oil to effectively intercept particles such as wax crystals and impurities in the edible oil from the low-concentration crystallization tank group, thereby improving the purity of the edible oil from the low-concentration crystallization tank group.

[0024] Although the present invention is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person skilled in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person skilled in the art who is familiar with the present technical field may easily think of changes or substitutions within the technical scope disclosed in the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A continuous crystallization device for dewaxing edible oil, comprising an oil storage tank, characterized in that: The output end of the oil storage tank is connected to the oil inlet of the high-concentration crystal nurturing system and the oil inlet of the low-concentration crystal nurturing system respectively, and the oil outlet of the high-concentration crystal nurturing system and the oil outlet of the low-concentration crystal nurturing system are connected to the filter tank through valves respectively.

2. A continuous crystal growth device for dewaxing edible oil according to claim 1, characterized in that: The high-concentration crystal growing system includes a high-concentration premixing tank and a high-concentration crystal growing tank group connected in series; the low-concentration crystal growing tank system includes a low-concentration premixing tank and a low-concentration crystal growing tank group connected in series.

3. A continuous crystal growth device for dewaxing edible oil as claimed in claim 2, characterized in that: The upper ends of the high-concentration premixing tank and the low-concentration premixing tank are respectively provided with oil inlets, and the lower ends of the high-concentration premixing tank and the low-concentration premixing tank are respectively provided with discharge ports.

4. A continuous crystal growth device for dewaxing edible oil according to claim 2 or 3, characterized in that: The high-concentration premixing tank and the low-concentration premixing tank are respectively provided with filter aid inlets.

5. A continuous crystal growth device for dewaxing edible oil as claimed in claim 2, characterized in that: The high-concentration crystal growing tank group and the low-concentration crystal growing tank group respectively include a plurality of crystal growing tanks connected in series, a feed inlet is arranged at the lower end of the side wall of the crystal growing tank, and an oil outlet is arranged at the upper end of the side wall of the crystal growing tank.

6. A continuous crystal growth device for dewaxing edible oil as claimed in claim 5, characterized in that: A frequency conversion motor is installed on the top of the crystal culturing tank, a stirring device is arranged inside the crystal culturing tank, and the frequency conversion motor is connected to the stirring device.

7. The edible oil dewaxing continuous crystal growing device according to claim 5, characterized in that: The number of crystal growing tanks in the high-concentration crystal growing tank group and the low-concentration crystal growing tank group is greater than one.

8. The edible oil dewaxing continuous crystal growing device according to claim 1, characterized in that: A filter plate is arranged inside the filter tank.

9. The edible oil dewaxing continuous crystal growing device according to claim 1, characterized in that: The number of filter tanks is greater than one.

10. The edible oil dewaxing continuous crystal growing device according to claim 2, characterized in that: Oil inlet pumps are respectively arranged between the high-concentration premixing tank and the high-concentration crystal-growing tank group, and between the low-concentration premixing tank and the low-concentration crystal-growing tank group; oil outlet pumps are respectively arranged between the high-concentration crystal-growing tank group and the valve, and between the low-concentration crystal-growing tank group and the valve.

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