Squeezed vegetable oil low-temperature cold refining and fragrance keeping system

Abstract

A pressed rapeseed oil low-temperature cold refining fragrance-keeping system comprises a crude oil tank, a mixing tank, a filter and a finished oil tank, the crude oil tank is communicated with an external oil press and used for storing crude oil pressed by the oil press, the crude oil tank is communicated with the mixing tank through a pipeline connected with a first oil pump, and the top of the mixing tank is communicated with a diatomite storage tank. A valve is arranged between the diatomite storage tank and the mixing tank, a second stirring device is arranged in the mixing tank, a heat exchange pipeline is arranged in the mixing tank, the heat exchange pipeline and the inner space of the mixing tank are mutually independent, and the mixing tank is communicated with the filter through a pipeline connected with a second oil pump. And the filter is communicated with the product oil tank through a pipeline. According to the device, the original flavor of the pressed rapeseed oil can be guaranteed to the maximum extent, impurities such as water in the pressed rapeseed oil are removed, the quality of the pressed rapeseed oil finished product is guaranteed, no chemical is added in the whole process, and it can be guaranteed to the maximum extent that nutrient substances of the pressed rapeseed oil are not damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of rapeseed oil pressing equipment, in particular to a low-temperature cold refining and aroma preservation system for pressing rapeseed oil. Background Art

[0002] At present, during the refining process, rapeseed oil must undergo degumming to meet market requirements and national and industry standards.

[0003] Degumming is the process of removing the gum-soluble impurities in the squeezed rapeseed oil, including phospholipids, proteins, carbohydrates and other substances. 80% of the gum is phospholipids, so degumming is dephosphorization. Lecithin is divided into hydrated phospholipids and non-hydratable phospholipids.

[0004] At present, the existing technology is to add electrolytes such as phosphoric acid or salt to the squeezed rapeseed oil to convert phospholipids, convert non-hydratable phospholipids into hydrated phospholipids, and then add 80-85℃ hot water to form a colloidal solution and precipitate the phospholipids by utilizing the water absorption and expansion of phospholipids. In order to ensure the clean removal of phospholipids, more hot water is often added, so that the water content in the finished rapeseed oil is more, affecting the product quality. In order to ensure the quality of the product, some companies add a drying process at the back end, that is, heating the oil to 90-110℃ and using vacuum to remove the water in the oil, but the drying process will cause part of the fragrance of the squeezed oil to be emitted, and the fragrance will not last long during later storage. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model aims to provide a low-temperature cold refining and aroma preservation system for pressed rapeseed oil.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A low-temperature cold refining and aroma preservation system for squeezed rapeseed oil, comprising a crude oil tank, a mixing tank, a filter and a finished oil tank, the crude oil tank being connected to an external oil press for storing crude oil squeezed by the oil press, the crude oil tank being connected to the mixing tank through a pipeline connected to a first oil pump, a diatomaceous earth storage tank storing diatomaceous earth being arranged on the top of the mixing tank, a valve being arranged between the diatomaceous earth storage tank and the mixing tank, a second stirring device being arranged in the mixing tank, a heat exchange pipeline being arranged in the mixing tank, the heat exchange pipeline and the space in the mixing tank being independent of each other, both ends of the heat exchange pipeline being passed through the side wall of the mixing tank and being arranged on the outside of the mixing tank, one end of which is a water inlet end and the other end is a water outlet end, the water inlet end is connected to a cold water pipe, the mixing tank being connected to the filter through a pipeline connected to a second oil pump, the filter being used for filtering the crude oil, the filter being connected to the finished oil tank through a pipeline, and the finished oil tank being used for storing filtered finished oil.

[0008] Preferably, a first stirring device is provided in the crude oil tank for stirring the crude oil in the crude oil tank.

[0009] Preferably, the filter includes a membrane filter and a plate and frame filter, the membrane filter is connected to the mixing tank through a pipeline connected to the second oil pump, the plate and frame filter is connected to the finished oil tank through a pipeline, and the membrane filter is connected to the plate and frame filter through a pipeline.

[0010] Preferably, an intermediate storage tank is provided between the membrane filter and the plate and frame filter, the membrane filter and the intermediate storage tank are communicated with each other through a pipeline, and the intermediate storage tank and the plate and frame filter are communicated with each other through a pipeline connected with a third oil pump.

[0011] Preferably, a filter residue hopper for containing filter residue is respectively provided below the membrane filter and the plate and frame filter.

[0012] Preferably, the second stirring device includes a second drive motor and a second stirring shaft, the second drive motor is arranged on the top of the mixing tank, the upper end of the second stirring shaft extends out of the top of the mixing tank and is connected to the second drive motor, the second drive motor is used to drive the second stirring shaft to rotate, and a plurality of second stirring blades are distributed and connected to the second stirring shaft from top to bottom.

[0013] Preferably, an oil inlet is provided at the top of the side wall of the mixing tank, and the oil inlet is connected to the crude oil tank through a pipeline connected to the first oil pump. An oil outlet is provided at the bottom of the mixing tank, and the oil outlet is connected to the filter through a pipeline connected to the second oil pump.

[0014] Preferably, the first stirring device includes a first drive motor and a first stirring shaft, the first drive motor is arranged on the top of the crude oil tank, the upper end of the first stirring shaft extends out of the top of the crude oil tank and is connected to the first drive motor, the first drive motor is used to drive the first stirring shaft to rotate, and the first stirring shaft is connected to a plurality of first stirring blades distributed from top to bottom.

[0015] Beneficial effects of the utility model

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The utility model provides a mixing tank and a diatomaceous earth storage tank on the mixing tank, adds diatomaceous earth into the mixing tank, stirs and fully mixes the crude oil in the mixing tank with the diatomaceous earth through a second stirring device, utilizes the adsorption function of the diatomaceous earth to adsorb a large amount of water-soluble impurities such as water, phospholipids, proteins, sugars and the like and mechanical impurities such as fibers, cake crumbs and the like onto the diatomaceous earth to form agglomerates, and then filters out the diatomaceous earth agglomerates and impurities in the crude oil through a filter to form finished oil. Meanwhile, the crude oil is kept at a low temperature during the processing through a heat exchange pipeline, so that the original flavor of the squeezed rapeseed oil can be guaranteed to the greatest extent, impurities such as water in the squeezed rapeseed oil can be removed, and the quality of the squeezed finished rapeseed oil can be guaranteed. In the whole process, no chemical substances are added, so that the nutrients of the squeezed rapeseed oil can be guaranteed to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the crude oil tank;

[0020] Figure 3 It is a schematic diagram of the structure of the mixing tank;

[0021] Figure 4 It is a structural schematic diagram of a membrane filter;

[0022] Figure 5 It is a structural schematic diagram of a plate and frame filter;

[0023] Figure 6 It is a schematic diagram of the structures of the first oil pump, the second oil pump and the third oil pump. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] See also Figure 1-6 The utility model provides a technical solution: a low-temperature cold refining and aroma preservation system for squeezing rapeseed oil, comprising a crude oil tank 1, a mixing tank 2, a filter and a finished oil tank 3, wherein the crude oil tank 1 is connected to an external oil press for storing crude oil squeezed by the oil press, the crude oil tank 1 is connected to the mixing tank 2 through a pipeline connected to a first oil pump 41, the top of the mixing tank 2 is connected to a diatomaceous earth storage tank 21 storing diatomaceous earth, a valve is provided between the diatomaceous earth storage tank 21 and the mixing tank 2, and a second stirring device is provided in the mixing tank 2. A heat exchange pipeline 24 is arranged in the mixing tank 2, and the heat exchange pipeline 24 is independent of the space in the mixing tank 2. Both ends of the heat exchange pipeline 24 pass through the side wall of the mixing tank 2 and are arranged on the outside of the mixing tank 2, one end of which is a water inlet end, and the other end is a drainage end. The water inlet end is connected to a cold water pipe. The mixing tank 2 is connected to a filter through a pipeline connected to a second oil pump 42. The filter is used to filter the crude oil. The filter is connected to a finished oil tank 3 through a pipeline. The finished oil tank 3 is used to store filtered finished oil.

[0028] When in use, the crude oil in the crude oil tank 1 is transported to the mixing tank 2 through the first oil pump 41, cold water circulates in the heat exchange pipeline 24 running through the mixing tank 2 to take away the heat of the crude oil and keep the crude oil at a low temperature, the valve is opened to allow the diatomaceous earth in the diatomaceous earth storage tank 21 to fall into the mixing tank 2, and at the same time, the crude oil in the mixing tank 2 and the diatomaceous earth are stirred and fully mixed through the second stirring device, and a large amount of water-soluble impurities such as water, phospholipids, proteins, sugars and mechanical impurities such as fibers, crumbs and other substances are adsorbed on the diatomaceous earth by the adsorption function of the diatomaceous earth to form agglomerates, and then the crude oil of the mixed oil diatomaceous earth in the mixing tank 2 is transported to the filter through the second oil pump 42, and the diatomaceous earth agglomerates and impurities in the crude oil are filtered out by the filter to form finished oil, which is then stored in the finished oil tank 3.

[0029] The utility model provides a mixing tank 2 and a diatomaceous earth storage tank 21 on the mixing tank 2, adds diatomaceous earth into the mixing tank 2, and then stirs and fully mixes the crude oil in the mixing tank 2 with the diatomaceous earth through a second stirring device, utilizes the adsorption function of the diatomaceous earth to adsorb a large amount of water-soluble impurities, such as water, phospholipids, proteins, sugars, etc. and mechanical impurities, such as fibers, crumbs, etc., onto the diatomaceous earth to form agglomerates, and then filters out the diatomaceous earth agglomerates and impurities in the crude oil through a filter to form finished oil, and at the same time, the crude oil is kept at a low temperature during the processing through a heat exchange pipeline 24, which can guarantee the original flavor of the squeezed rapeseed oil to the greatest extent, remove impurities such as water in the squeezed rapeseed oil, and ensure the quality of the squeezed finished rapeseed oil, and no chemicals are added in the whole process, which can guarantee that the nutrients in the squeezed rapeseed oil are not destroyed to the greatest extent.

[0030] Furthermore, a first stirring device is provided in the crude oil tank 1 for stirring the crude oil in the crude oil tank 1 to prevent precipitation.

[0031] Further, the filter includes a membrane filter 5 and a plate and frame filter 6. The membrane filter 5 is connected to the mixing tank 2 through a pipeline connected to the second oil pump 42, and the plate and frame filter 6 is connected to the finished oil tank 3 through a pipeline. The membrane filter 5 is connected to the plate and frame filter 6 through a pipeline. The filter cloth and filter cake in the membrane filter 5 can block water-soluble impurities and mechanical impurities outside the filter cake, and then filter through the plate and frame filter 6. The plate and frame filter 6 uses double-layer filtration of filter cloth and filter paper, which can further filter out impurities in the crude oil.

[0032] Furthermore, in order to avoid the problem that the filtering output of the membrane filter 5 and the plate and frame filter 6 are not synchronized, which causes the vegetable oil filtered by the membrane filter 5 to overflow or the plate and frame filter 6 to filter empty, an intermediate storage tank 7 is arranged between the membrane filter 5 and the plate and frame filter 6, and the membrane filter 5 is connected to the intermediate storage tank 7 through a pipeline, and the intermediate storage tank 7 is connected to the plate and frame filter 6 through a pipeline connected to the third oil pump 43. The vegetable oil filtered by the membrane filter 5 is stored in the intermediate storage tank 7. When the output of the membrane filter 5 is higher than that of the plate and frame filter 6, the vegetable oil filtered by the membrane filter 5 can be first stored in the intermediate storage tank 7 to avoid overflow. When the output of the membrane filter 5 is lower than that of the plate and frame filter 6, the plate and frame filter 6 can first filter the vegetable oil in the intermediate storage tank 7 to avoid empty filtration.

[0033] Furthermore, filter residue buckets 51 for containing filter residues are respectively provided below the membrane filter 5 and the plate and frame filter 6 to facilitate unloading of the filter residues.

[0034] Specifically, the second stirring device includes a second drive motor 231 and a second stirring shaft 232. The second drive motor 231 is arranged on the top of the mixing tank 2. The upper end of the second stirring shaft 232 extends out of the top of the mixing tank 2 and is connected to the second drive motor 231. The second drive motor 231 is used to drive the second stirring shaft 232 to rotate. A plurality of second stirring blades 233 are distributed and connected to the second stirring shaft 232 from top to bottom to achieve stirring.

[0035] Specifically, an oil inlet 25 is provided at the top of the side wall of the mixing tank 2, and the oil inlet 25 is connected to the crude oil tank 1 through a pipeline connected to the first oil pump 41. An oil outlet 26 is provided at the bottom of the mixing tank 2, and the oil outlet 26 is connected to the filter through a pipeline connected to the second oil pump 42.

[0036] Specifically, the first stirring device includes a first driving motor 111 and a first stirring shaft 112. The first driving motor 111 is arranged on the top of the crude oil tank 1. The upper end of the first stirring shaft 112 extends out of the top of the crude oil tank 1 and is connected to the first driving motor 111. The first driving motor 111 is used to drive the first stirring shaft 112 to rotate. A plurality of first stirring blades 113 are distributed and connected to the first stirring shaft 112 from top to bottom to achieve stirring.

[0037] When the utility model is in use, the crude oil squeezed out from the previous process is stored in the crude oil tank 1, and the first stirring device is arranged in the crude oil tank 1 to prevent precipitation. The crude oil is transported to the mixing tank 2 through the first oil pump 41, and the heat exchange pipeline 24 in the mixing tank 2 is fed with water of 15-20°C to keep the crude oil at a low temperature. The valve is opened, and diatomaceous earth with an oil weight of 0.5% is added from the diatomaceous earth storage tank 21 into the mixing tank 2. The stirring of the second stirring device is used to control the speed to 20-30rpm, and the stirring time is 20-30min. The second oil pump 42 is then used to transport the crude oil to the membrane filter 5 for filtration, and the filter cloth and filter cake are used to block the water-soluble impurities and mechanical impurities outside the filter cake. The clear oil enters the intermediate storage tank 7 from the filter cake. After filtering and squeezing the crude oil in the filter cake, the filter plate is opened to unload the filter cake into the filter residue bucket 51. After the first filtration, the rapeseed oil is transported to the plate and frame filter 6 through the third oil pump 43 for polishing filtration. The plate and frame filter uses filter cloth and filter paper for double-layer filtration. After filtering for a certain period of time, the plate and frame filter 6 is opened to unload the filter residue into the filter residue bucket 51. The filtered rapeseed oil enters the finished oil tank 3.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature cold refining and aroma preservation system for squeezing rapeseed oil, characterized in that: The invention comprises a crude oil tank (1), a mixing tank (2), a filter and a finished oil tank (3); the crude oil tank (1) is connected to an external oil press for storing crude oil squeezed by the oil press; the crude oil tank (1) is connected to the mixing tank (2) via a pipeline connected to a first oil pump (41); the top of the mixing tank (2) is connected to a diatomaceous earth storage tank (21) storing diatomaceous earth; a valve is provided between the diatomaceous earth storage tank (21) and the mixing tank (2); a second stirring device is provided in the mixing tank (2); and a A heat exchange pipeline (24), wherein the heat exchange pipeline (24) and the space inside the mixing tank (2) are independent of each other, and both ends of the heat exchange pipeline (24) pass through the side wall of the mixing tank (2) and are arranged outside the mixing tank (2), wherein one end is a water inlet end and the other end is a water outlet end, and the water inlet end is connected to a cold water pipe, and the mixing tank (2) is connected to a filter through a pipeline connected to a second oil pump (42), and the filter is used to filter crude oil, and the filter is connected to a finished oil tank (3) through a pipeline, and the finished oil tank (3) is used to store filtered finished oil.

2. A system for low-temperature cold refining and aroma preservation of rapeseed oil according to claim 1, characterized in that: The crude oil tank (1) is provided with a first stirring device for stirring the crude oil in the crude oil tank (1).

3. A system for low-temperature cold refining and aroma preservation of rapeseed oil according to claim 1, characterized in that: The filter comprises a membrane filter (5) and a plate-frame filter (6); the membrane filter (5) is connected to a mixing tank (2) via a pipeline connected to a second oil pump (42); the plate-frame filter (6) is connected to a finished oil tank (3) via a pipeline; and the membrane filter (5) is connected to the plate-frame filter (6) via a pipeline.

4. A system for low-temperature cold refining and aroma preservation of rapeseed oil according to claim 3, characterized in that: An intermediate storage tank (7) is provided between the membrane filter (5) and the plate-frame filter (6); the membrane filter (5) and the intermediate storage tank (7) are connected via a pipeline; and the intermediate storage tank (7) and the plate-frame filter (6) are connected via a pipeline connected to a third oil pump (43).

5. A system for low-temperature cold refining and aroma preservation of rapeseed oil according to claim 3, characterized in that: A filter residue bucket (51) for containing filter residue is respectively arranged below the membrane filter (5) and the plate and frame filter (6).

6. A system for low-temperature cold refining and aroma preservation of rapeseed oil according to claim 1, characterized in that: The second stirring device comprises a second driving motor (231) and a second stirring shaft (232); the second driving motor (231) is arranged at the top of the mixing tank (2); the upper end of the second stirring shaft (232) extends out of the top of the mixing tank (2) and is connected to the second driving motor (231); the second driving motor (231) is used to drive the second stirring shaft (232) to rotate; and a plurality of second stirring blades (233) are distributed and connected to the second stirring shaft (232) from top to bottom.

7. The low-temperature cold refining and aroma preservation system for pressed rapeseed oil according to claim 1, characterized in that: The top end of the side wall of the mixing tank (2) is provided with an oil inlet (25), the oil inlet (25) being connected to the crude oil tank (1) via a pipeline connected to a first oil pump (41), and the bottom of the mixing tank (2) is provided with an oil outlet (26), the oil outlet (26) being connected to a filter via a pipeline connected to a second oil pump (42).

8. The low-temperature cold refining and aroma preservation system for pressed rapeseed oil according to claim 2, characterized in that: The first stirring device comprises a first driving motor (111) and a first stirring shaft (112); the first driving motor (111) is arranged on the top of the crude oil tank (1); the upper end of the first stirring shaft (112) extends out of the top of the crude oil tank (1) and is connected to the first driving motor (111); the first driving motor (111) is used to drive the first stirring shaft (112) to rotate; and a plurality of first stirring blades (113) are distributed and connected to the first stirring shaft (112) from top to bottom.

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