A kind of white vinegar decolorization process and device

Abstract

The invention specifically relates to a white vinegar decolorization process and a device thereof, and belongs to the technical field of white vinegar preparation. The technical problem to be solved is to provide a white vinegar decolorization process and a device thereof with improved decolorization and impurity removal of white vinegar. The technical scheme adopted is: 1 volume portion of white vinegar to be filtered is added into a batching and stirring tank, and 9 volume portions of white vinegar to be filtered is added into a decolorization and stirring tank; bentonite, diatomaceous earth and activated carbon are added into the batching and stirring tank through a feeding port, stirred for 30 minutes, transferred into a decolorization and stirring tank, and stirred for 2 hours; a pump body and a valve on a circulation pipeline of a decolorization and stirring tank, a filter press, a circulation pool and a decolorization and stirring tank are opened to form a filtering circulation loop; when the turbidity of the white vinegar in the test circulation pool reaches 1μm, the white vinegar is transferred into a clear liquid tank; and then enters a hollow fiber filter for filtration. The invention not only improves the decolorization and impurity removal quality of the white vinegar, but also has relatively low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of white vinegar preparation, and particularly relates to a white vinegar decolorization process and a device thereof. Background Art

[0002] Vinegar is a traditional Chinese condiment. In ancient times, the Han working people used koji as a fermentation agent to ferment and brew vinegar. Oriental vinegar originated in China, and the history of vinegar brewing is at least more than 3,000 years. In the preparation process of white vinegar, in order to achieve the clarification and decolorization of white vinegar, the traditional method is to use activated carbon for filtration. The activated carbon is filtered out by a plate and frame filter press, and the clear liquid is stored in a sedimentation tank for precipitation. After the precipitation is completed, it is deployed for use. This decolorization process cannot meet the expected requirements for the decolorization of white vinegar. The produced white vinegar still has the problem of turbidity, which affects the quality of white vinegar. At present, in order to improve the decolorization quality of white vinegar, some manufacturers also use membrane filtration technology. Although the decolorization and impurity removal of white vinegar meet the production requirements, the membrane filtration cost is high, and the filtration and decolorization operation of white vinegar cannot be achieved efficiently, which increases the white vinegar production cost of the manufacturer. Summary of the invention

[0003] The invention overcomes the shortcomings of the prior art and provides a white vinegar decolorization process and a device thereof. Firstly, bentonite, diatomaceous earth and activated carbon in an appropriate proportion are used to perform preliminary decolorization of the white vinegar, and then filtering is performed. Finally, a hollow fiber filter is used to perform membrane filtration on the white vinegar, and the turbidity of the white vinegar reaches below 0.2 μm. Not only is the decolorization and impurity removal quality of the white vinegar improved, but the cost is relatively low, and the white vinegar is suitable for industrial application.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a white vinegar decolorization device, comprising: a batching and stirring tank, a decolorization stirring tank, a filter press, a circulation pool, a hollow fiber filter and a storage tank, the upper part of the batching and stirring tank is provided with a feed port B and a feeding port, the feed port B is used to add the white vinegar to be treated, the feeding port is used to add the solid material for decolorization, the lower end of the batching and stirring tank is connected with the upper end of the decolorization stirring tank through a pipeline, the upper part of the decolorization stirring tank is provided with a feed port A, and the feed port A is used to For adding the white vinegar to be treated, the lower end of the decolorizing stirring tank is communicated with the liquid inlet pipeline of the filter press, the liquid outlet of the filter press is communicated with the circulation pool pipeline, the circulation pool is communicated with the upper end pipeline of the decolorizing stirring tank, the liquid outlet of the decolorizing stirring tank, the filter press, the circulation pool and the liquid inlet of the decolorizing stirring tank form a circulating filtration pipeline, the circulation pool is communicated with the liquid inlet pipeline of the hollow fiber filter, and the liquid outlet of the hollow fiber filter is communicated with the storage tank pipeline for storing white vinegar.

[0005] Pump bodies are installed on the pipelines connecting the batching stirring tank and the decolorizing stirring tank, the decolorizing stirring tank and the filter press, and the circulation pool and the decolorizing stirring tank.

[0006] Valves for controlling whether liquid flows are installed on the pipelines connecting the batching stirring tank and the decolorizing stirring tank, the decolorizing stirring tank and the filter press, the circulating pool and the decolorizing stirring tank, the circulating pool and the hollow fiber filter, and the hollow fiber filter and the storage tank.

[0007] The circulation pool is a ground pool arranged below the ground level, which facilitates the flow of the liquid filtered after the white vinegar is decolorized.

[0008] A clear liquid tank is also provided on the pipeline connecting the circulation pool and the hollow fiber filter, the liquid outlet of the circulation pool is connected to the liquid inlet pipeline of the clear liquid tank, a pump body is installed on the pipeline connecting the circulation pool and the clear liquid tank, and the liquid outlet of the clear liquid tank is connected to the liquid inlet pipeline of the hollow fiber filter.

[0009] The clear liquid tank is arranged on the working ground. By arranging the clear liquid tank for temporarily storing white vinegar, the circulation pressure of the white vinegar is increased, so that the white vinegar can enter the hollow fiber filter for filtering treatment more conveniently.

[0010] The decolorizing solid material comprises the following raw materials: bentonite, diatomaceous earth and activated carbon.

[0011] The filter cloth of the filter press adopts 6-strand cage cloth.

[0012] A white vinegar decolorization process specifically comprises the following steps:

[0013] (1) Add 1 volume of the white vinegar to be filtered into the batching and mixing tank, and add 9 volume of the white vinegar to be filtered into the decolorizing and mixing tank;

[0014] (2) Add bentonite, diatomite and activated carbon into the mixing tank through the feeding port, stir for 30 min, transfer to the decolorizing mixing tank and stir for 2 h. The weight ratio of the bentonite, diatomite and activated carbon is 5:8:8. The weight (kg) of the bentonite is 5:8:8. The volume (m) of the white vinegar to be filtered in the above step (1) is 1:1. 3 ) ratio is 1.25:1000, the weight (kg) of the diatomaceous earth and the volume (m) of the white vinegar to be filtered in the above step (1) 3 ) ratio is 2:1000, the weight (kg) of the activated carbon and the volume (m) of the white vinegar to be filtered in the above step (1) 3 ) ratio is 2:1000;

[0015] (3) Opening the pump and valve on the decolorizing stirring tank-filter press-circulating pool-decolorizing stirring tank circulation pipeline to form a filtration circulation loop for circulating filtration;

[0016] (4) Testing the turbidity of white vinegar in the circulation pool, when the white vinegar is colorless and the turbidity reaches 1 μm by naked eye, transfer it into the clear liquid tank;

[0017] (5) The white vinegar in the clear liquid tank enters the hollow fiber filter for filtration, and then enters the storage tank for storage. At this time, the turbidity of the white vinegar is less than 0.2 μm.

[0018] The diatomaceous earth is a mixture of 80-mesh diatomaceous earth and 200-mesh diatomaceous earth in equal amounts.

[0019] The bentonite is a filtering agent, and the activated carbon decolorizes the white vinegar through adsorption.

[0020] The diatomaceous earth is a filter aid. By mixing diatomaceous earths of different mesh sizes and coordinating with the filter cloth pores of the filter press, the added filter materials bentonite, diatomaceous earth and activated carbon are filtered, and impurities and macromolecules formed by protein polymerization in the white vinegar are filtered out. The brewed white vinegar after filtration is clear and transparent.

[0021] Compared with the prior art, the present invention has the following beneficial effects.

[0022] 1. The present invention performs membrane filtration on white vinegar through traditional activated carbon adsorption decolorization, filter press filtration and hollow fiber filter, and the turbidity of white vinegar reaches below 0.2 μm, which not only improves the decolorization and impurity removal quality of white vinegar, but also has relatively low cost and is suitable for industrial application.

[0023] 2. The activated carbon used in the present invention is a powerful and efficient adsorbent and decolorant and is safe and non-toxic. Diatomaceous earth with different mesh sizes is used as a filter aid, which improves the filtering effect of the filter press and improves the decolorization and impurity removal effect of white vinegar.

[0024] 3. The present invention can filter and decolorize white vinegar through this process, and the turbidity is below 0.2 μm, thereby improving the flavor and taste of white vinegar and improving the quality of white vinegar. The operation is simple and convenient for large-scale production and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a schematic structural diagram of a white vinegar decolorization device of the present invention.

[0027] In the figure: 1 is a circulation tank, 2 is a filter press, 3 is a batching mixing tank, 4 is a decolorizing mixing tank, 5 is a clear liquid tank, 6 is a hollow fiber filter, 7 is a storage tank, 9 is a valve, 10 is a feed port A, 11 is a feed port B, and 12 is a feeding port. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with specific embodiments.

[0029] A white vinegar decolorization device, comprising: a batching and stirring tank 3, a decoloring and stirring tank 4, a filter press 2, a circulation pool 1, a hollow fiber filter 6 and a storage tank 7, wherein the upper portion of the batching and stirring tank 3 is provided with a feed port B11 and a feed port 12, wherein the feed port B11 is used to add the white vinegar to be treated, and the feed port 12 is used to add the solid material for decolorization, the lower end of the batching and stirring tank 3 is connected with the upper end of the decoloring and stirring tank 4 through a pipeline, and the upper portion of the decoloring and stirring tank 4 is provided with a feed port A10, wherein the feed port A10 is used to add the white vinegar to be treated. Vinegar, the lower end of the decolorizing stirring tank 4 is connected to the liquid inlet pipeline of the filter press 2, the liquid outlet of the filter press 2 is connected to the circulation pool 1 pipeline, the circulation pool 1 is connected to the upper end pipeline of the decolorizing stirring tank 4, the liquid outlet of the decolorizing stirring tank 4, the filter press 2, the circulation pool 1 and the liquid inlet of the decolorizing stirring tank 4 form a circulating filtration pipeline, the circulation pool 1 is connected to the liquid inlet pipeline of the hollow fiber filter 6, and the liquid outlet of the hollow fiber filter 6 is connected to the storage tank 7 for storing white vinegar.

[0030] Pump bodies are installed on the pipelines connecting the batching stirring tank 3 and the decoloring stirring tank 4, the decoloring stirring tank 4 and the filter press 2, and the circulation pool 1 and the decoloring stirring tank 4.

[0031] Valves 9 are installed on the pipelines connecting the batching stirring tank 3 and the decolorizing stirring tank 4, the decolorizing stirring tank 4 and the filter press 2, the circulation pool 1 and the decolorizing stirring tank 4, the circulation pool 1 and the hollow fiber filter 6, and the hollow fiber filter 6 and the storage tank 7.

[0032] The circulation pool 1 is a ground pool arranged below the ground level.

[0033] A clear liquid tank 5 is also provided on the pipeline connecting the circulation pool 1 and the hollow fiber filter 6. The liquid outlet of the circulation pool 1 is connected to the liquid inlet pipeline of the clear liquid tank 5. A pump body is installed on the pipeline connecting the circulation pool 1 and the clear liquid tank 5. The liquid outlet of the clear liquid tank 5 is connected to the liquid inlet pipeline of the hollow fiber filter 6.

[0034] The clear liquid tank 5 is arranged on the working ground. By arranging the clear liquid tank 5 for temporarily storing white vinegar, the circulation pressure of the white vinegar is increased, so that the white vinegar can enter the hollow fiber filter 6 for filtering treatment.

[0035] The decolorizing solid material comprises the following raw materials: bentonite, diatomaceous earth and activated carbon.

[0036] The filter cloth of the filter press 2 adopts 6-strand cage cloth.

[0037] A white vinegar decolorization process specifically comprises the following steps:

[0038] (1) 18m 3 Unfiltered white vinegar is added to the decolorizing stirring tank 4, and 2m 3 Unfiltered white vinegar is added to the ingredient mixing tank 3;

[0039] (2) 25 kg of bentonite, 40 kg of diatomaceous earth, 20 kg of 80-mesh diatomaceous earth and 20 kg of 200-mesh diatomaceous earth were mixed, and 40 kg of activated carbon were poured into the batching stirring tank 3, stirred for 30 min, transferred to the decolorizing stirring tank 4, stirred for 2 h, and filtered through the filter press 2 to form a circulating filtration loop consisting of the decolorizing stirring tank 4-filter press 2-circulation tank 1-decolorizing stirring tank 4;

[0040] (3) When the white vinegar in the circulation pool 1 is colorless and has a turbidity of 1 μm, it is transferred to the clear liquid tank 5;

[0041] (4) The clear liquid is filtered from the clear liquid tank 5 through a 0.2 μm hollow fiber filter until the turbidity is below 0.2 μm and is transferred to the storage tank 7 for storage. The filtering is completed.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Those familiar with the technology may modify or improve the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A white vinegar decolorization process, characterized in that: A white vinegar decolorization device is used to carry out a white vinegar decolorization process; The white vinegar decolorizing device comprises: a batching and stirring tank (3), a decolorizing and stirring tank (4), a filter press (2), a circulation pool (1), a hollow fiber filter (6) and a storage tank (7); the upper portion of the batching and stirring tank (3) is provided with a feed inlet B (11) and a feeding port (12); the feed inlet B (11) is used to add white vinegar to be treated; the feeding port (12) is used to add solid materials for decolorization; the lower end of the batching and stirring tank (3) is connected to the upper end of the decolorizing and stirring tank (4) by a pipeline; the upper portion of the decolorizing and stirring tank (4) is provided with a A feed port A (10) is provided, the feed port A (10) is used to add the white vinegar to be treated, the lower end of the decolorizing stirring tank (4) is connected to the liquid inlet pipeline of the filter press (2), the liquid outlet of the filter press (2) is connected to the pipeline of the circulation pool (1), the circulation pool (1) is connected to the upper end pipeline of the decolorizing stirring tank (4), the circulation pool (1) is connected to the liquid inlet pipeline of the hollow fiber filter (6), and the liquid outlet of the hollow fiber filter (6) is connected to the pipeline of the storage tank (7) for storing white vinegar; Pump bodies are installed on the pipelines connecting the batching stirring tank (3) and the decolorizing stirring tank (4), the decolorizing stirring tank (4) and the filter press (2), and the circulation pool (1) and the decolorizing stirring tank (4); Valves (9) are installed on the pipelines connecting the batching stirring tank (3) and the decolorizing stirring tank (4), the decolorizing stirring tank (4) and the filter press (2), the circulation pool (1) and the decolorizing stirring tank (4), the circulation pool (1) and the hollow fiber filter (6), and the hollow fiber filter (6) and the storage tank (7); The circulation pool (1) is a ground pool arranged below the ground level; A clear liquid tank (5) is also provided on the pipeline connecting the circulation pool (1) and the hollow fiber filter (6); the liquid outlet of the circulation pool (1) is connected to the liquid inlet pipeline of the clear liquid tank (5); a pump body is installed on the pipeline connecting the circulation pool (1) and the clear liquid tank (5); the liquid outlet of the clear liquid tank (5) is connected to the liquid inlet pipeline of the hollow fiber filter (6); The white vinegar decolorization process specifically comprises the following steps: (1) Add 1 volume part of the white vinegar to be filtered into the batching mixing tank (3), and add 9 volume parts of the white vinegar to be filtered into the decolorizing mixing tank (4); (2) Add bentonite, diatomite and activated carbon into the batching stirring tank (3) through the feeding port (12), stir for 30 minutes, transfer to the decolorizing stirring tank (4), and stir for 2 hours. The weight ratio of the bentonite, diatomite and activated carbon is 5:8:

8. The weight (kg) of the bentonite is equal to the volume (m) of the white vinegar to be filtered in the above step (1). 3 ) ratio is 1.25:1000; (3) Opening the pump body and valve (9) on the circulation pipeline of the decolorizing stirring tank (4) - filter press (2) - circulation pool (1) - decolorizing stirring tank (4) to form a filtering circulation loop for circulating filtration; (4) Testing the turbidity of white vinegar in the circulation pool (1), and transferring the vinegar to the clear liquid tank (5) when the turbidity reaches 1 μm; (5) The white vinegar in the clear liquid tank (5) enters the hollow fiber filter (6) for filtration, and then enters the storage tank (7) for storage. At this time, the turbidity of the white vinegar is less than 0.2 μm.

2. A white vinegar decolorization process according to claim 1, characterized in that: The diatomaceous earth is a mixture of 80-mesh diatomaceous earth and 200-mesh diatomaceous earth in equal amounts.

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