CN212024794U - Device for coproducing feed-grade and food-grade baking soda by heavy alkali wet decomposition method - Google Patents
Device for coproducing feed-grade and food-grade baking soda by heavy alkali wet decomposition method Download PDFInfo
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Abstract
The utility model discloses a device for coproducing feed grade and food grade baking soda by a heavy alkali wet decomposition method, which comprises a stirring kettle, wherein the stirring kettle is sequentially connected with a pump, a wet decomposition tower, a first thickener, a first centrifugal machine, a carbonization tower, a second thickener and a second centrifugal machine through pipelines; the bottom inlet of the wet decomposition tower is connected with a steam pipeline in the combined alkali system, the top outlet of the wet decomposition tower is connected with an ammonia recovery device in the combined alkali system, and the side outlet of the first centrifuge is connected with a drying device to prepare a feed-grade baking soda product; the top outlets of the first thickener and the first centrifuge are connected with a feed inlet at the upper part of the carbonization tower, a feed inlet at the lower part of the carbonization tower is connected with a carbon dioxide pipeline in the combined alkali system, and a side outlet of the second centrifuge is connected with a drying device to prepare a food-grade baking soda product. The utility model discloses can prepare the feed grade baking soda that accords with the national standard requirement and oral grade baking soda, technology easy operation, mother liquor recycles, no environmental pollution.
Description
Technical Field
The utility model relates to a device, more specifically say so, relate to a device of heavy alkali wet decomposition method coproduction fodder level and food level baking soda.
Background
Sodium bicarbonate is an important inorganic chemical product, is widely applied to various industries, including chemical engineering, light industry, pharmaceutical industry, biomedical engineering industry and the like, and plays an important role in national economy. The production method of baking soda includes double decomposition method, gas-liquid phase method and natural soda method. The gas-liquid phase method, namely the soda carbonization method, is a main method for producing baking soda in China due to the stable product quality. The process mainly comprises the steps of alkali dissolution, filtration and impurity removal, carbonization and separation and drying. The method has the defects of long production flow, more equipment, large floor area, high operation and maintenance cost and single product.
For the technical problem of baking soda production, CN1089965526 discloses a preparation method of granular heavy baking soda, which uses crude heavy soda as a raw material, largely decomposes ammonium bicarbonate and sodium bicarbonate by a wet decomposition method, and then carbonizes to obtain a sodium bicarbonate product, wherein the sodium bicarbonate needs to be completely decomposed in the wet decomposition process, and the energy consumption is high. Zeng Fengchun (a new process for producing sodium bicarbonate by a synthesis method, modern chemical engineering, 2008,1,69-73) provides a new process for preparing alkali at low temperature: the energy consumption is reduced by changing the soda production process through soda ash and sodium sulfide, but the method has the problem of high raw material cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide a device of heavy alkali wet decomposition method coproduction feed level and food level baking soda, can prepare out the feed level baking soda and the oral grade baking soda that accord with the national standard requirement, technology easy operation, mother liquor recycles, no environmental pollution.
The purpose of the utility model is realized through the following technical scheme.
The utility model discloses a device for coproducing feed grade and food grade baking soda by a heavy alkali wet decomposition method, which comprises a stirring kettle, wherein the stirring kettle is provided with an automatic stirring device, a feed inlet of the stirring kettle is connected with a heavy alkali pipeline and a soda mother liquor pipeline, and the stirring kettle is sequentially connected with a pump, a wet decomposition tower, a first thickener, a first centrifugal machine, a carbonization tower, a second thickener and a second centrifugal machine through pipelines;
the pump is connected between a bottom outlet of the stirring kettle and an upper feed inlet of the wet decomposition tower through a pipeline, a bottom inlet of the wet decomposition tower is connected with a steam pipeline in the combined alkali system through a pipeline, a top outlet of the wet decomposition tower is connected with an ammonia recovery device in the combined alkali system through a pipeline, a lower outlet of the wet decomposition tower is connected with an upper inlet of a first thickener through a pipeline, a bottom outlet of the first thickener is connected with a lower inlet of a first centrifuge through a pipeline, and a side outlet of the first centrifuge is communicated with a drying device through a pipeline to prepare a feed-grade baking soda product;
the top outlets of the first thickener and the first centrifuge are connected with a feed inlet at the upper part of the carbonization tower through pipelines, a feed inlet at the lower part of the carbonization tower is connected with a carbon dioxide pipeline in an alkali connection system through pipelines, a discharge outlet of the carbonization tower is connected with a feed inlet of the second thickener through pipelines, a discharge outlet at the bottom of the second thickener is connected with a feed inlet of the second centrifuge through pipelines, and a side outlet of the second centrifuge is communicated with a drying device through pipelines to prepare a food-grade baking soda product.
And the second thickener and a discharge port at the top of the second centrifugal machine are connected with the stirring kettle through pipelines.
Compared with the prior art, the utility model discloses a beneficial effect that technical scheme brought is:
(1) the utility model discloses in wet decomposition tower device that uses can decompose the heavy alkali in proper amount, can directly obtain the fodder level baking soda that accords with the national standard requirement through the washing, and is with low costs, and process flow is simple.
(2) The utility model discloses can carry out the production of feed level baking soda and oral grade baking soda simultaneously, the mother liquor after the preparation of feed level baking soda can directly be used for the preparation of oral grade baking soda, and the mother liquor retrieval and utilization after the preparation of oral grade baking soda mixes with the heavy alkali to stirred tank, can make full use of raw materials, the emission of the mother liquor of reducing system, increase of production.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1 stirred tank, 2 wet decomposition tower, 3 first thickener, 4 first centrifuge, 5 carbonizer, 6 second thickener, 7 second centrifuge, 8 pump
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in figure 1, the device for coproducing feed grade and food grade baking soda by the heavy alkali wet decomposition method mainly comprises a stirring kettle 1, a wet decomposition tower 2, a first thickener 3, a first centrifuge 4, a carbonization tower 5, a second thickener 6, a second centrifuge 7 and a pump 8.
Stirred tank 1, stirred tank 1 be used for the mixture of heavy alkali with soda mother liquor, stirred tank 1 have automatic stirring device, the feed inlet is connected with heavy alkali pipeline and soda mother liquor pipeline, is used for letting in heavy alkali and soda mother liquor respectively, 1 bottom outlet of stirred tank pass through the pipeline and link to each other with pump 8.
Wet decomposing tower 2, wet decomposing tower 2 be used for the wet decomposition of heavy alkali, 2 upper portion feed inlets of wet decomposing tower pass through the pipeline and link to each other with pump 8, the bottom import passes through the pipeline and links to each other with the steam conduit who allies oneself with in the alkali system, 2 top outlets of wet decomposing tower pass through the pipeline and link to each other with the ammonia recovery unit who allies oneself with in the alkali system, the lower part export passes through the pipeline and links to each other with first stiff ware 3.
First stiff ware 3, first stiff ware 3 be used for the stiff of wet decomposition back product, 3 upper portion feed inlets of first stiff ware link to each other with the export of 2 lower parts of wet decomposition tower through the pipeline, 3 top exports of first stiff ware pass through the pipeline and link to each other with carbonator 5, the bottom export passes through the pipeline and links to each other with first centrifuge 4.
The first centrifuge 4 is used for centrifuging thick solids, a feed inlet of the first centrifuge 4 is connected with an outlet at the bottom of the first thickener 3 through a pipeline, an outlet at the top of the first centrifuge 4 is connected with the carbonization tower 5 through a pipeline, and an outlet at the side surface of the first centrifuge 4 is communicated with a drying device through a pipeline to prepare a feed-grade baking soda product.
And the second thickener 6 is used for thickening the carbonized product, a feed inlet of the second thickener 6 is connected with a discharge outlet of the carbonization tower 5 through a pipeline, an outlet at the top of the second thickener 6 is connected with the stirring kettle 1 through a pipeline, and an outlet at the bottom of the second thickener is connected with the second centrifuge 7 through a pipeline.
And the second centrifuge 7 is used for centrifuging thick solids, a feed inlet of the second centrifuge 7 is connected with an outlet at the bottom of the second thickener 6 through a pipeline, an outlet at the top of the second centrifuge 7 is connected with the stirring kettle 1 through a pipeline, and a side outlet is communicated with the drying device through a pipeline to prepare the food-grade baking soda product.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to the above-described specific functions and operations, and the above-described embodiments are merely illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the protection scope of the present invention.
Claims (2)
1. A device for coproducing feed grade sodium bicarbonate and food grade baking soda by a heavy alkali wet decomposition method comprises a stirring kettle (1), wherein the stirring kettle (1) is provided with an automatic stirring device, and a feed inlet of the stirring kettle (1) is connected with a heavy alkali pipeline and a soda mother liquor pipeline, and is characterized in that the stirring kettle (1) is sequentially connected with a pump (8), a wet decomposition tower (2), a first thickener (3), a first centrifugal machine (4), a carbonization tower (5), a second thickener (6) and a second centrifugal machine (7) through pipelines;
the pump (8) is connected between a bottom outlet of the stirring kettle (1) and an upper feed inlet of the wet decomposition tower (2) through a pipeline, a bottom inlet of the wet decomposition tower (2) is connected with a steam pipeline in an alkali-associated system through a pipeline, a top outlet of the wet decomposition tower (2) is connected with an ammonia recovery device in the alkali-associated system through a pipeline, a lower outlet of the wet decomposition tower (2) is connected with an upper inlet of the first thickener (3) through a pipeline, a bottom outlet of the first thickener (3) is connected with a lower inlet of the first centrifuge (4) through a pipeline, and a side outlet of the first centrifuge (4) is communicated with a drying device through a pipeline to prepare a feed-grade baking soda product;
the top export of first stiff ware (3) and first centrifuge (4) all is connected with carbonizer (5) upper portion feed inlet through the pipeline, carbonizer (5) lower part feed inlet links to each other with the carbon dioxide pipeline in the antithetical couplet alkali system through the pipeline, carbonizer (5) discharge gate passes through the pipeline and links to each other with second stiff ware (6) feed inlet, second stiff ware (6) bottom discharge gate passes through the pipeline and is connected with second centrifuge (7) feed inlet, second centrifuge (7) side export is linked together through pipeline and drying device and prepares food level baking soda product.
2. The plant for the coproduction of feed-grade and food-grade baking soda according to the heavy alkali wet decomposition process of claim 1, wherein the top outlets of the second thickener (6) and the second centrifuge (7) are connected to the stirred tank (1) by means of lines.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922146065.8U CN212024794U (en) | 2019-12-04 | 2019-12-04 | Device for coproducing feed-grade and food-grade baking soda by heavy alkali wet decomposition method |
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| CN201922146065.8U CN212024794U (en) | 2019-12-04 | 2019-12-04 | Device for coproducing feed-grade and food-grade baking soda by heavy alkali wet decomposition method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117756140A (en) * | 2024-02-22 | 2024-03-26 | 南京新筛分科技实业有限公司 | process in sodium carbonate production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117756140A (en) * | 2024-02-22 | 2024-03-26 | 南京新筛分科技实业有限公司 | process in sodium carbonate production |
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