Plate and frame filter for stevioside production

Abstract

The utility model provides a plate frame filter for stevioside production, which belongs to the field of food processing and comprises a shell and an automatic protection component arranged in the shell, the automatic protection component comprises an air cylinder, a telescopic pipe, a fixing block, a baffle, a limiting groove, a fixing frame, a support frame and a metal filter cover, the air cylinder is fixedly arranged on the inner wall of the support frame, and the metal filter cover is arranged on the outer wall of the support frame. One end of the telescopic pipe is fixedly arranged at the output end of the air cylinder, the other end of the telescopic pipe is fixedly arranged on the outer wall of the fixing block, the fixing block is fixedly arranged at the top of the outer wall of the baffle, the baffle is slidably connected to the outer wall of the fixing frame, and the limiting groove is formed in the outer wall of the fixing frame. By means of the automatic protection assembly, the baffle can descend to protect the filtering membrane on the fixing frame where stevioside is filtered, so that the situation that the filtering membrane is damaged by water flow with certain impact force during cleaning is avoided, the metal filtering cover is cleaned in time, the situation of cross contamination can be avoided, and the filtering efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of food processing, concretely relates to a plate and frame filter for stevia sugar production. BACKGROUND

[0002] A plate and frame filter is mainly composed of multiple filter plates and filter frames arranged alternately. The filter plates and filter frames are usually square, and the filter plates have filter cloth or filter mesh on their surfaces for filtering stevia sugar solution. The filter frames are used to support the filter cloth and form a filtering space. There are sealing devices, such as rubber sealing rings, on the edges of the filter plates and filter frames to ensure that the stevia sugar solution does not leak during the filtering process. It also has an inlet, an outlet, and a residue discharge port. The inlet is used to introduce the stevia sugar solution into the filtering unit, and the solution enters the space between the filter frame and the filter plate under pressure. The filtered stevia sugar liquid flows out of the outlet through the filter cloth, while the solid impurities are trapped in the filter frame and can be discharged through the residue discharge port after the filtering is completed. When the solution in the stevia sugar production process enters the plate and frame filter, the solution passes through the filter cloth under the drive of pressure (usually provided by a pump). The solid impurity particles in the stevia sugar are too large to pass through the pores of the filter cloth and are blocked in the filter frame, while the effective components of the stevia sugar dissolved in the solution can pass through the filter cloth smoothly, thereby achieving solid-liquid separation. As the filtering proceeds, the solid impurities in the filter frame gradually increase, and the filtering resistance also gradually increases. When the resistance reaches a certain level, the filtering speed will decrease significantly, at which point the filtering needs to be stopped, and residue discharge and filter cloth cleaning operations need to be performed before the filtering is continued. High-efficiency filtering: The plate and frame filter can quickly and effectively filter the stevia sugar solution and separate the impurities, thereby improving the purity of the stevia sugar product. Adaptation to different scales of production: The filtering area of the plate and frame filter can be adjusted according to the production scale.

[0003] A disadvantage of a plate-and-frame filter for steviol production, which is a batch filtration device, the filtration resistance gradually increases as the filter residue accumulates during the filtration process. When the resistance reaches a certain level, the filtration speed will decrease significantly, at which point the filtration needs to be stopped for residue removal and cleaning operations. This makes the entire filtration process not continuous, and compared to some continuous filtration devices, the amount of steviol solution that can be processed in the same time is relatively small, thereby affecting the production efficiency. Limited filtration speed: the filtration speed mainly depends on factors such as pressure difference, porosity of filter cloth, and viscosity of steviol solution. In actual production, even at a higher pressure, due to the limited filtration area of the filter cloth (although the area can be increased by increasing the number of plate-and-frame, but it will be limited by the size of the equipment), the filtration speed still cannot meet the demand of large-scale and high-efficiency production of steviol. Easy cross-contamination: during production, if the production batch needs to be changed or different types of steviol solution need to be filtered, due to incomplete cleaning, cross-contamination is likely to occur. For example, impurities from the previous batch may mix into the next batch of steviol solution, thereby affecting the purity and quality of the product. Utility model content

[0004] The utility model aims at providing a plate-and-frame filter for steviol production, aiming at solving the problems raised in the background art.

[0005] A plate-and-frame filter for steviol production, comprising,

[0006] A housing;

[0007] An automatic protection assembly is arranged in the interior of the housing, wherein: the automatic protection assembly comprises a gas cylinder, an extension pipe, a fixed block, a baffle, a limiting groove, a fixed frame, a support frame, and a metal filter cover; the gas cylinder is fixedly arranged at the inner wall of the support frame; one end of the extension pipe is fixedly arranged at the output end of the gas cylinder; the other end of the extension pipe is fixedly arranged at the outer wall of the fixed block; the fixed block is fixedly arranged at the top of the outer wall of the baffle; the baffle is slidingly connected to the outer wall of the fixed frame; the limiting groove is arranged in the outer wall of the fixed frame; the fixed frame is fixedly arranged at the bottom of the inner wall of the housing; the inner wall of the fixed frame is embedded with a filter membrane; the support frame is fixedly arranged at the outer wall of the housing; and the metal filter cover is fixedly arranged at the inner wall of the housing.

[0008] Further, one side of the outer wall of the housing is fixedly provided with a feeding pipe, and the other side of the outer wall of the housing is fixedly provided with a discharging pipe. The outer wall of the feeding pipe is fixedly provided with a blowdown pipe.

[0009] Further, the top of the inner wall of the support frame is fixedly provided with a water tank, the bottom of the outer wall of the water tank is fixedly provided with a water supply pipe, and the water supply pipe is fixedly arranged at the top of the outer wall of the housing.

[0010] Further, the inside of the shell is fixedly provided with filter cotton.

[0011] Further, the composition material of the filter cotton is PP cotton.

[0012] Further, the metal filter cover and the fixing frame are matched with each other.

[0013] Compared with the prior art, the beneficial effects of the present application are:

[0014] Through the automatic protection assembly, the filter membrane on the fixing frame filtering the stevia sugar can be protected by lowering the baffle, so as to prevent the filter membrane from being damaged by the water flow with a certain impact force during cleaning, and timely cleaning the metal filter cover can avoid cross contamination and ensure the filtering efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application and explain the technical scheme of the present application, and do not constitute a limitation on the present application. In the drawings:

[0016] Fig. 1 is a perspective view of the present application;

[0017] Fig. 2 is a partial perspective view of the present application;

[0018] Fig. 3 is a perspective view of the discharge pipe of the present application.

[0019] In the drawings: 1, shell; 2, air cylinder; 3, telescopic pipe; 4, fixed block; 5, baffle; 6, limiting groove; 7, fixing frame; 8, blowdown pipe; 9, support frame; 10, water tank; 11, water supply pipe; 12, feeding pipe; 13, filter cotton; 14, metal filter cover; 15, discharge pipe. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] In the description of the utility model, it needs to explain, the term "upper", "lower", "internal", "external", "top / bottom end" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as the limitation of the utility model. In addition, the term "first", "second" is only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the utility model, it needs to explain, unless otherwise specified and limited, the term "installation", "set with", "sleeve / interfacing", "connection" and so on, should be broad understanding, for example "connection", can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through intermediate media, can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] Please refer to Figs. 1-3 The technical scheme provided by the embodiment is as follows:

[0024] A plate and frame filter for stevioside production, comprising,

[0025] The shell 1;

[0026] The automatic protection assembly is arranged in the inside of the shell 1, wherein: the automatic protection assembly comprises a cylinder 2, a telescopic pipe 3, a fixed block 4, a baffle 5, a limiting groove 6, a fixed frame 7, a support frame 9 and a metal filter cover 14, the cylinder 2 is fixedly arranged at the inner wall of the support frame 9, one end of the telescopic pipe 3 is fixedly arranged at the output end of the cylinder 2, the other end of the telescopic pipe 3 is fixedly arranged at the outer wall of the fixed block 4, the fixed block 4 is fixedly arranged at the outer wall top of the baffle 5, the baffle 5 is slidably connected to the outer wall of the fixed frame 7, the limiting groove 6 is arranged at the outer wall of the fixed frame 7, the fixed frame 7 is fixedly arranged at the inner wall bottom of the shell 1, the inner wall of the fixed frame 7 is embedded with a filter membrane, the support frame 9 is fixedly arranged at the outer wall of the shell 1, and the metal filter cover 14 is fixedly arranged at the inner wall of the shell 1.

[0027] In the embodiment of the utility model, through automatic protection component, can lower the baffle 5 and protect the filter membrane on the fixed frame 7 of filtering sweet stevia sugar, prevent when cleaning, avoid having certain impact force water flow and damage filter membrane, clean metal filter cover 14 in time, can avoid the situation of cross contamination, guarantee the efficiency of filtering, first, when the solution in sweet stevia sugar production process passes the feed pipe 12 and enters the plate and frame filter, under the drive of pressure, the solution passes the filter cotton 13 and metal filter cover 14, reaches filter membrane, the solid impurity particle in sweet stevia sugar is larger, cannot pass the aperture of filter cotton 13 and metal filter cover 14, is blocked in metal filter cover 14, after passing filter membrane, sweet stevia sugar will discharge from the discharge pipe 15, when the solid impurity in filter frame gradually increases, can lower the baffle 5 through the air cylinder 2, protect the filter membrane, then through two direction water supply pipe 11, can wash the solid impurity on metal filter cover 14, finally through the sewage pipe 8 on both sides and discharges the filter.

[0028] Specifically, the outer wall of the shell 1 is fixedly provided with a feed pipe 12, and the other side of the outer wall of the shell 1 is fixedly provided with a discharge pipe 15.

[0029] In the embodiment of the utility model, the solution in sweet stevia sugar production process passes the feed pipe 12 and enters the plate and frame filter, and the filtered sweet stevia sugar is discharged from the discharge pipe 15.

[0030] Specifically, the inner wall top of the support frame 9 is fixedly provided with a water tank 10, and the outer wall bottom of the water tank 10 is fixedly provided with a water supply pipe 11.

[0031] In the embodiment of the utility model, the solid impurities on the metal filter cover 14 can be washed by the water supply pipe 11 in two directions.

[0032] Specifically, the inside of the shell 1 is fixedly provided with filter cotton 13.

[0033] In the embodiment of the utility model, the solution passes the filter cotton 13, and the larger impurities in the sweet stevia sugar can be filtered out.

[0034] Specifically, the composition material of the filter cotton 13 is PP cotton.

[0035] In the embodiment of the utility model, the PP cotton can pass the sweet stevia sugar solution, which helps to improve the purity of the sweet stevia sugar product.

[0036] Specifically, the metal filter cover 14 and the fixed frame 7 are matched with each other.

[0037] In the embodiment of the utility model, stability and sealing property in the filtering state are ensured.

[0038] Working principle:

[0039] Through the automatic protection component, the baffle 5 can be lowered to protect the filter membrane on the fixed frame 7 of the filtered stevia sugar, so as to prevent the water flow with a certain impact force from damaging the filter membrane during cleaning, and timely cleaning of the metal filter cover 14 can avoid cross contamination, ensure the filtering efficiency, first, when the solution in the stevia sugar production process enters the plate and frame filter through the feed pipe 12, under the driving of the pressure, the solution passes through the filter cotton 13 and the metal filter cover 14 and reaches the filter membrane, the solid impurity particles in the stevia sugar are large and cannot pass through the pores of the filter cotton 13 and the metal filter cover 14 and are blocked in the metal filter cover 14, after passing through the filter membrane, the stevia sugar is discharged from the discharge pipe 15, when the solid impurities in the filter frame gradually increase, the baffle 5 can be lowered through the air cylinder 2 to protect the filter membrane, then the solid impurities on the metal filter cover 14 can be washed through the two-direction water supply pipe 11, and finally the filter is discharged through the two side blow-off pipes 8.

[0040] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A plate-and-frame filter for steviol sugar production, characterized by, The utility model relates to a kind of automatic protection assembly, including, Housing (1); Automatic protection assembly, it is located at the inside of housing (1), wherein: the automatic protection assembly includes cylinder (2), telescopic pipe (3), fixed block (4), baffle (5), limiting groove (6), fixed frame (7), support frame (9) and metal filter cover (14), the cylinder (2) is fixedly arranged at the inner wall of support frame (9), one end of the telescopic pipe (3) is fixedly arranged at the output end of cylinder (2), the other end of the telescopic pipe (3) is fixedly arranged at the outer wall of fixed block (4), the fixed block (4) is fixedly arranged at the outer wall top of baffle (5), the baffle (5) is slidably connected to the outer wall of fixed frame (7), the limiting groove (6) is opened in the outer wall of fixed frame (7), the fixed frame (7) is fixedly arranged at the inner wall bottom of housing (1), the inner wall of fixed frame (7) is embedded with filter membrane, the support frame (9) is fixedly arranged at the outer wall of housing (1), the metal filter cover (14) is fixedly arranged at the inner wall of housing (1).

2. The plate-and-frame filter for steviol production according to claim 1, characterized in that, The outer wall of housing (1) is fixedly provided with feed pipe (12) on one side, and discharge pipe (15) is fixedly provided on the other side of the outer wall of housing (1), and the outer wall of feed pipe (12) is fixedly provided with blowdown pipe (8).

3. The plate-and-frame filter for steviol production according to claim 2, characterized in that, The inner wall top of support frame (9) is fixedly provided with water tank (10), the outer wall bottom of water tank (10) is fixedly provided with water supply pipe (11), and the water supply pipe (11) is fixedly arranged at the outer wall top of housing (1).

4. The plate-and-frame filter for steviol production according to claim 3, characterized in that, The inside of housing (1) is fixedly provided with filter cotton (13).

5. The plate-and-frame filter for steviol production according to claim 4, characterized in that, The composition material of filter cotton (13) is PP cotton.

6. The plate-and-frame filter for steviol production according to claim 5, characterized in that, The metal filter cover (14) and fixed frame (7) are matched with each other.

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