CN101928021A - System and process for preparing low-salt dense soda ash by liquid-phase hydration - Google Patents
System and process for preparing low-salt dense soda ash by liquid-phase hydration Download PDFInfo
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- CN101928021A CN101928021A CN 201010270913 CN201010270913A CN101928021A CN 101928021 A CN101928021 A CN 101928021A CN 201010270913 CN201010270913 CN 201010270913 CN 201010270913 A CN201010270913 A CN 201010270913A CN 101928021 A CN101928021 A CN 101928021A
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Abstract
The invention discloses a system and a process for preparing low-salt dense soda ash by liquid-phase hydration. The method comprises the following steps of: adding light soda ash with the temperature of more than 93 DEG C, condensate water and saturated solution of sodium carbonate according to a mass ratio of 1:0.22:1.4-1:0.22:2.0 into a hydration tank for hydration, wherein the reaction temperature is controlled to be between 100 and 104 DEG C and the reaction time is 20 to 25 minutes, and crystallizing the soda ash in a form of a monohydrate soda, namely Na2CO3.H2O after the reaction; after separating the monohydrate soda crystal slurry with a hydrocyclone separator, feeding the top liquid into a mother liquor storing barrel and feeding the bottom liquid into a centrifuge; after dehydrating the bottom liquid with the centrifuge to obtain a monohydrate soda filter cake; and drying, cooling and screening the monohydrate soda filter cake to obtain the finished product, namely the low-salt dense soda ash, wherein when the centrifuge is used for dehydrating, water is added to wash off a part of salts. The system can guarantee the constant material level of a material bin so that the feeding of the soda ash is stable. The obtained soda ash product has the advantages of large crystallization granule size, high first-rate product rate and high added value, wherein the product with crystallization granule size of more than 180 mu m is up to over 75 percent; the qualification rate is up to 100 percent; and the first-rate product rate is up to 95 percent.
Description
Technical field
The present invention relates to a kind of system and production technique of making low-salt dense soda ash, particularly a kind of Soda Ash Light 99.2min. that makes with sesquialter alkali technology or carborization technology is a raw material, with the system and the production technique of preparing low-salt dense soda ash by liquid-phase hydration.
Background technology
At present, Soda Ash Danse has replaced Soda Ash Light 99.2min. as industrial raw material in many places, and Soda Ash Danse has many advantages than Soda Ash Light 99.2min..Produce Soda Ash Danse now and adopt solid phase hydration process more.Solid phase hydration process is produced Soda Ash Danse, because the restriction of its technology makes that the granularity of alkali is inhomogeneous, cost is higher relatively, and in addition, the salinity of alkali is wayward.At present, it is 100% salable product low-salt dense soda ash that the legal production Soda Ash Danse of liquid phase water technology can obtain qualification rate, but because system defect is easy to produce fine crystals, the premium grads rate that causes product is about 88%.
Summary of the invention
First purpose of the present invention is to provide a kind of system with preparing low-salt dense soda ash by liquid-phase hydration.
Second purpose of the present invention is to provide a kind of technology with preparing low-salt dense soda ash by liquid-phase hydration, and the qualification rate of producing Soda Ash Danse with present method reaches 100%, and the premium grads rate reaches 95%.
First purpose of the present invention is implemented by following technical scheme: a kind of system with preparing low-salt dense soda ash by liquid-phase hydration includes as lower device: light grey feed bin, light grey dumper, hydration tank soda ash feeder, hydration tank, coagulate water self-solidifying water storage tank, the mother liquor storage tank, whizzer, movable flow device, wherein said light grey feed bin links to each other with described light grey dumper, described light grey dumper links to each other with described hydration tank soda ash feeder, and described hydration tank soda ash feeder links to each other with described hydration tank, and the described water self-solidifying water storage tank that coagulates links to each other with described hydration tank, described mother liquor storage tank links to each other with described hydration tank, described hydration tank links to each other with described movable flow device, and described movable flow device links to each other with described mother liquor storage tank with described whizzer respectively, and described whizzer links to each other with described mother liquor storage tank.
Second purpose of the present invention implemented by following technical scheme: the production technique of preparing low-salt dense soda ash by liquid-phase hydration includes following steps: water, preparation saturated solution of sodium carbonate, water and reaction, movable flow device separatory, dehydration, drying are coagulated in preparation Soda Ash Light 99.2min., preparation, promptly obtain the finished product low-salt dense soda ash; Wherein:
(1) preparation Soda Ash Light 99.2min., 170～180 ℃ the Soda Ash Light 99.2min. that adopts the sesquialter alkaline process to make, buy securities with all one's capital by handling equipment to light grey feed bin and remaining, in the light grey feed bin temperature be 150～170 ℃ Soda Ash Light 99.2min. through light grey dumper, hydration tank soda ash feeder to hydration tank; Soda Ash Light 99.2min. can also adopt carborization technology to make, and its temperature is 170～180 ℃.
(2) prepare water with fixed attention, 98～100 ℃ the water that coagulates is added the hydration filling through coagulating water self-solidifying water storage tank;
(3) preparation saturated solution of sodium carbonate, the isolated saturated solution of sodium carbonate of movable flow device and whizzer is added the mother liquor storage tank, and is heated to 93～97 ℃ in carrying the mother liquor storage tank of heating system, and then adds hydration tank;
(4) hydration reaction, the Soda Ash Light 99.2min. that is made by above-mentioned steps (1) (2) (3), to coagulate water and saturated solution of sodium carbonate be in hydration is irritated hydration reaction to take place in 1: 0.22: 1.4～1: 0.22: 2.0 with mass ratio, temperature of reaction is controlled at 100～104 ℃, reaction times is 20～25 minutes, the hydro-combination process Soda Ash Light 99.2min. reaches 1.62: 1 with the mass ratio that coagulates water～and 1.92: 1, the monohydrate sodium carbonate Na that hydration reaction generates
2CO
3H
2The O magma is sent into movable flow device;
(5) movable flow device separatory, the monohydrate sodium carbonate magma separates through the movable flow device stiff, and the top flow liquid is that saturated solution of sodium carbonate is sent into the mother liquor storage tank, and underflow liquid is sent into whizzer;
(6) dehydration, underflow liquid obtains the monohydrate sodium carbonate filter cake behind centrifuge dewatering, when using centrifuge dewatering, need add washing and remove the part salt, and the saturated solution of sodium carbonate that obtains behind the centrifuge dewatering is sent into the mother liquor storage tank simultaneously;
(7) drying, monohydrate sodium carbonate filter cake obtain the finished product low-salt dense soda ash after by dry, cooling, screening.
The invention has the advantages that: the system of preparing low-salt dense soda ash by liquid-phase hydration of the present invention can guarantee that bin-level is constant, the Soda Ash Light 99.2min. charging is steady, is convenient to operation, and total system can steady in a long-term be moved, and system's working rate is higher than the similar technology of industry.The present invention adopts the system of preparing low-salt dense soda ash by liquid-phase hydration to carry out the production of preparing low-salt dense soda ash by liquid-phase hydration, saturated solution of sodium carbonate and coagulate water and advance the hydration tank temperature wherein greater than 93 ℃, can guarantee that temperature fluctuation is less in the hydration tank, avoid the generation of fine crystals, help the monohydrate sodium carbonate crystallization.The hydro-combination process Soda Ash Light 99.2min. reaches 1.62: 1 with the mass ratio that coagulates water～and 1.92: 1, to compare with 1: 1 in the past, it is more even that soda ash and saturated solution of sodium carbonate are mixed; Reaction times reaches 20-25 minute, makes the product grain size number greater than the reaching more than 75% of 180 μ m, and the premium grads rate reaches 95%.Gained soda ash product, grain size number is big, premium grads rate height, added value height.Meet CNS GB210.1-2004; Quality product is in highest level of the same trade, and purity, granularity can satisfy the requirement of industries such as float glass, picture tube fully.
Description of drawings
Fig. 1 is the structural representation of the system of preparing low-salt dense soda ash by liquid-phase hydration of the present invention.
Fig. 2 is the process flow sheet of process for preparing low-salt heavy sodium carbonate by liquid-phase hydration method of the present invention.
Light grey feed bin 1, light grey dumper 2, hydration tank soda ash feeder 3, hydration tank 4 is coagulated water self-solidifying water storage tank 5, mother liquor storage tank 6, whizzer 7, movable flow device 8,
Embodiment:
Embodiment 1: a kind of system of preparing low-salt dense soda ash by liquid-phase hydration, it includes as lower device: light grey feed bin 1, light grey dumper 2, hydration tank soda ash feeder 3, hydration tank 4 is coagulated water self-solidifying water storage tank 5, mother liquor storage tank 6, whizzer 7, movable flow device 8, wherein light grey feed bin 1 links to each other with light grey dumper 2, and light grey dumper 2 links to each other with hydration tank soda ash feeder 3, hydration tank soda ash feeder 3 links to each other with hydration tank 4, coagulate water self-solidifying water storage tank 5 and link to each other with hydration tank 4, mother liquor storage tank 6 links to each other with hydration tank 4, and hydration tank 4 links to each other with movable flow device 8, movable flow device 8 links to each other with mother liquor storage tank 6 with whizzer 7 respectively, and whizzer 7 links to each other with mother liquor storage tank 6.
Adopt the system of above-mentioned preparing low-salt dense soda ash by liquid-phase hydration to carry out the production technique of preparing low-salt dense soda ash by liquid-phase hydration, it is implemented by following steps: (1) preparation Soda Ash Light 99.2min., 170～180 ℃ the Soda Ash Light 99.2min. that adopts the sesquialter alkaline process to make, buy securities with all one's capital by handling equipment to light grey feed bin and remaining, in the light grey feed bin temperature be 150 ℃ Soda Ash Light 99.2min. through light grey dumper, hydration tank soda ash feeder to hydration tank; (2) prepare water with fixed attention, 98 ℃ the water that coagulates is added the hydration filling through coagulating water self-solidifying water storage tank; (3) preparation saturated solution of sodium carbonate, the isolated saturated solution of sodium carbonate of movable flow device and whizzer is added the mother liquor storage tank, and is heated to 93 ℃ in carrying the mother liquor storage tank of heating system, and then adds hydration tank; (4) hydration reaction, the Soda Ash Light 99.2min. that is made by above-mentioned steps (1) (2) (3), to coagulate water and saturated solution of sodium carbonate be in hydration irritate hydration reaction to take place at 1: 0.22: 1.4 with mass ratio, temperature of reaction is controlled at 100 ℃, reaction times is 20 minutes, the hydro-combination process Soda Ash Light 99.2min. reaches 1.62: 1 with the mass ratio that coagulates water, the monohydrate sodium carbonate Na that hydration reaction generates
2CO
3H
2The O magma is sent into movable flow device; (5) movable flow device separatory, the monohydrate sodium carbonate magma separates through the movable flow device stiff, and the top flow liquid is that saturated solution of sodium carbonate is sent into the mother liquor storage tank, and underflow liquid is sent into whizzer; (6) dehydration, underflow liquid obtains the monohydrate sodium carbonate filter cake behind centrifuge dewatering, when using centrifuge dewatering, need add washing and remove the part salt, and the saturated solution of sodium carbonate that obtains behind the centrifuge dewatering is sent into the mother liquor storage tank simultaneously; (7) drying, monohydrate sodium carbonate filter cake obtain the finished product low-salt dense soda ash after by dry, cooling, screening.
Embodiment 2: about the structure of the system of preparing low-salt dense soda ash by liquid-phase hydration as described in the embodiment 1.
Adopt the system of above-mentioned preparing low-salt dense soda ash by liquid-phase hydration to carry out the production technique of preparing low-salt dense soda ash by liquid-phase hydration, it is implemented by following steps: (1) preparation Soda Ash Light 99.2min., 170～180 ℃ the Soda Ash Light 99.2min. that adopts the sesquialter alkaline process to make, buy securities with all one's capital by handling equipment to light grey feed bin and remaining, in the light grey feed bin temperature be 160 ℃ Soda Ash Light 99.2min. through light grey dumper, hydration tank soda ash feeder to hydration tank; (2) prepare water with fixed attention, 99 ℃ the water that coagulates is added the hydration filling through coagulating water self-solidifying water storage tank; (3) preparation saturated solution of sodium carbonate, the isolated saturated solution of sodium carbonate of movable flow device and whizzer is added the mother liquor storage tank, and is heated to 95 ℃ in carrying the mother liquor storage tank of heating system, and then adds hydration tank; (4) hydration reaction, the Soda Ash Light 99.2min. that is made by above-mentioned steps (1) (2) (3), to coagulate water and saturated solution of sodium carbonate be in hydration irritate hydration reaction to take place at 1: 0.22: 1.7 with mass ratio, temperature of reaction is controlled at 102 ℃, reaction times is 23 minutes, the hydro-combination process Soda Ash Light 99.2min. reaches 1.92: 1 with the mass ratio that coagulates water, the monohydrate sodium carbonate Na that hydration reaction generates
2CO
3H
2The O magma is sent into movable flow device; (5) movable flow device separatory, the monohydrate sodium carbonate magma separates through the movable flow device stiff, and the top flow liquid is that saturated solution of sodium carbonate is sent into the mother liquor storage tank, and underflow liquid is sent into whizzer; (6) dehydration, underflow liquid obtains the monohydrate sodium carbonate filter cake behind centrifuge dewatering, when using centrifuge dewatering, need add washing and remove the part salt, and the saturated solution of sodium carbonate that obtains behind the centrifuge dewatering is sent into the mother liquor storage tank simultaneously; (7) drying, monohydrate sodium carbonate filter cake obtain the finished product low-salt dense soda ash after by dry, cooling, screening.
Embodiment 3: about the structure of the system of preparing low-salt dense soda ash by liquid-phase hydration as described in the embodiment 1.
Adopt the system of above-mentioned preparing low-salt dense soda ash by liquid-phase hydration to carry out the production technique of preparing low-salt dense soda ash by liquid-phase hydration, it is implemented by following steps: (1) preparation Soda Ash Light 99.2min., 170～180 ℃ the Soda Ash Light 99.2min. that adopts the sesquialter alkaline process to make, buy securities with all one's capital by handling equipment to light grey feed bin and remaining, in the light grey feed bin temperature be 170 ℃ Soda Ash Light 99.2min. through light grey dumper, hydration tank soda ash feeder to hydration tank; (2) prepare water with fixed attention, 100 ℃ the water that coagulates is added the hydration filling through coagulating water self-solidifying water storage tank; (3) preparation saturated solution of sodium carbonate, the isolated saturated solution of sodium carbonate of movable flow device and whizzer is added the mother liquor storage tank, and is heated to 97 ℃ in carrying the mother liquor storage tank of heating system, and then adds hydration tank; (4) hydration reaction, the Soda Ash Light 99.2min. that is made by above-mentioned steps (1) (2) (3), to coagulate water and saturated solution of sodium carbonate be in hydration irritate hydration reaction to take place at 1: 0.22: 2.0 with mass ratio, temperature of reaction is controlled at 104 ℃, reaction times is 25 minutes, the hydro-combination process Soda Ash Light 99.2min. reaches 1.75: 1 with the mass ratio that coagulates water, the monohydrate sodium carbonate Na that hydration reaction generates
2CO
3H
2The O magma is sent into movable flow device; (5) movable flow device separatory, the monohydrate sodium carbonate magma separates through the movable flow device stiff, and the top flow liquid is that saturated solution of sodium carbonate is sent into the mother liquor storage tank, and underflow liquid is sent into whizzer; (6) dehydration, underflow liquid obtains the monohydrate sodium carbonate filter cake behind centrifuge dewatering, when using centrifuge dewatering, need add washing and remove the part salt, and the saturated solution of sodium carbonate that obtains behind the centrifuge dewatering is sent into the mother liquor storage tank simultaneously; (7) drying, monohydrate sodium carbonate filter cake obtain the finished product low-salt dense soda ash after by dry, cooling, screening.
Embodiment 4: about the structure of the system of preparing low-salt dense soda ash by liquid-phase hydration as described in the embodiment 1.
Adopt the system of above-mentioned preparing low-salt dense soda ash by liquid-phase hydration to carry out the production technique of preparing low-salt dense soda ash by liquid-phase hydration, it is implemented by following steps: (1) preparation Soda Ash Light 99.2min., 170～180 ℃ the Soda Ash Light 99.2min. that adopts carborization technology to make, buy securities with all one's capital by handling equipment to light grey feed bin and remaining, in the light grey feed bin temperature be 165 ℃ Soda Ash Light 99.2min. through light grey dumper, hydration tank soda ash feeder to hydration tank; (2) prepare water with fixed attention, 99 ℃ the water that coagulates is added the hydration filling through coagulating water self-solidifying water storage tank; (3) preparation saturated solution of sodium carbonate, the isolated saturated solution of sodium carbonate of movable flow device and whizzer is added the mother liquor storage tank, and is heated to 96 ℃ in carrying the mother liquor storage tank of heating system, and then adds hydration tank; (4) hydration reaction, the Soda Ash Light 99.2min. that is made by above-mentioned steps (1) (2) (3), to coagulate water and saturated solution of sodium carbonate be in hydration irritate hydration reaction to take place at 1: 0.22: 1.9 with mass ratio, temperature of reaction is controlled at 103 ℃, reaction times is 24 minutes, the hydro-combination process Soda Ash Light 99.2min. reaches 1.77: 1 with the mass ratio that coagulates water, the monohydrate sodium carbonate Na that hydration reaction generates
2CO
3H
2The O magma is sent into movable flow device; (5) movable flow device separatory, the monohydrate sodium carbonate magma separates through the movable flow device stiff, and the top flow liquid is that saturated solution of sodium carbonate is sent into the mother liquor storage tank, and underflow liquid is sent into whizzer; (6) dehydration, underflow liquid obtains the monohydrate sodium carbonate filter cake behind centrifuge dewatering, when using centrifuge dewatering, need add washing and remove the part salt, and the saturated solution of sodium carbonate that obtains behind the centrifuge dewatering is sent into the mother liquor storage tank simultaneously; (7) drying, monohydrate sodium carbonate filter cake obtain the finished product low-salt dense soda ash after by dry, cooling, screening.
Claims (4)
1. the system of a preparing low-salt dense soda ash by liquid-phase hydration, it is characterized in that, it includes as lower device: light grey feed bin, light grey dumper, hydration tank soda ash feeder, hydration tank, coagulate water self-solidifying water storage tank, the mother liquor storage tank, whizzer, movable flow device, wherein said light grey feed bin links to each other with described light grey dumper, described light grey dumper links to each other with described hydration tank soda ash feeder, and described hydration tank soda ash feeder links to each other with described hydration tank, and the described water self-solidifying water storage tank that coagulates links to each other with described hydration tank, described mother liquor storage tank links to each other with described hydration tank, described hydration tank links to each other with described movable flow device, and described movable flow device links to each other with described mother liquor storage tank with described whizzer respectively, and described whizzer links to each other with described mother liquor storage tank.
2. the production technique of a preparing low-salt dense soda ash by liquid-phase hydration, it is characterized in that, it includes following steps: water, preparation saturated solution of sodium carbonate, water and reaction, movable flow device separatory, dehydration, drying are coagulated in preparation Soda Ash Light 99.2min., preparation, promptly obtain the finished product low-salt dense soda ash; Wherein:
(1) preparation Soda Ash Light 99.2min., 170～180 ℃ the Soda Ash Light 99.2min. that adopts the sesquialter alkaline process to make, buy securities with all one's capital by handling equipment to light grey feed bin and remaining, in the light grey feed bin temperature be 150～170 ℃ Soda Ash Light 99.2min. through light grey dumper, hydration tank soda ash feeder to hydration tank;
(2) prepare water with fixed attention, 98～100 ℃ the water that coagulates is added the hydration filling through coagulating water self-solidifying water storage tank;
(3) preparation saturated solution of sodium carbonate, the isolated saturated solution of sodium carbonate of movable flow device and whizzer is added the mother liquor storage tank, and is heated to 93～97 ℃ in carrying the mother liquor storage tank of heating system, and then adds hydration tank;
(4) hydration reaction, the Soda Ash Light 99.2min. that is made by above-mentioned steps (1) (2) (3), to coagulate water and saturated solution of sodium carbonate be in hydration is irritated hydration reaction to take place in 1: 0.22: 1.4～1: 0.22: 2.0 with mass ratio, temperature of reaction is controlled at 100～104 ℃, reaction times is 20～25 minutes, the monohydrate sodium carbonate Na that hydration reaction generates
2CO
3H
2The O magma is sent into movable flow device;
(5) movable flow device separatory, the monohydrate sodium carbonate magma separates through the movable flow device stiff, and the top flow liquid is that saturated solution of sodium carbonate is sent into the mother liquor storage tank, and underflow liquid is sent into whizzer;
(6) dehydration, underflow liquid obtains the monohydrate sodium carbonate filter cake behind centrifuge dewatering, when using centrifuge dewatering, need add washing and remove the part salt, and the saturated solution of sodium carbonate that obtains behind the centrifuge dewatering is sent into the mother liquor storage tank simultaneously;
(7) drying, monohydrate sodium carbonate filter cake obtain the finished product low-salt dense soda ash after by dry, cooling, screening.
3. the production technique of preparing low-salt dense soda ash by liquid-phase hydration according to claim 2 is characterized in that: the Soda Ash Light 99.2min. in the described step (1), and can also adopt carborization technology to make, its temperature is 170～180 ℃.
4. the production technique of preparing low-salt dense soda ash by liquid-phase hydration according to claim 2 is characterized in that: in the described step (4), the hydro-combination process Soda Ash Light 99.2min. reaches 1.62: 1 with the mass ratio that coagulates water～and 1.92: 1.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530999A (en) * | 2012-01-16 | 2012-07-04 | 丁丽芳 | Method for producing monohydrate sodium carbonate by virtue of liquid phase hydration |
| CN104528774A (en) * | 2014-12-01 | 2015-04-22 | 青岛碱业股份有限公司 | Liquid-phase hydration method separation ash treatment process |
| CN109850924A (en) * | 2019-01-09 | 2019-06-07 | 申恒杰 | A kind of environment-friendly type heavy alkali process units |
| CN112551558A (en) * | 2021-02-18 | 2021-03-26 | 天津渤化永利化工股份有限公司 | Production method of heavy soda ash |
| CN112875725A (en) * | 2021-01-18 | 2021-06-01 | 惠州市盛世和润实业有限公司 | Production process of low-salt heavy alkali solution |
| CN114538477A (en) * | 2022-04-27 | 2022-05-27 | 天津渤化永利化工股份有限公司 | Improved production method of heavy soda ash |
| CN114644350A (en) * | 2022-05-23 | 2022-06-21 | 天津渤化永利化工股份有限公司 | Production method of heavy soda ash |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102530999A (en) * | 2012-01-16 | 2012-07-04 | 丁丽芳 | Method for producing monohydrate sodium carbonate by virtue of liquid phase hydration |
| CN104528774A (en) * | 2014-12-01 | 2015-04-22 | 青岛碱业股份有限公司 | Liquid-phase hydration method separation ash treatment process |
| CN109850924A (en) * | 2019-01-09 | 2019-06-07 | 申恒杰 | A kind of environment-friendly type heavy alkali process units |
| CN112875725A (en) * | 2021-01-18 | 2021-06-01 | 惠州市盛世和润实业有限公司 | Production process of low-salt heavy alkali solution |
| CN112551558A (en) * | 2021-02-18 | 2021-03-26 | 天津渤化永利化工股份有限公司 | Production method of heavy soda ash |
| CN114538477A (en) * | 2022-04-27 | 2022-05-27 | 天津渤化永利化工股份有限公司 | Improved production method of heavy soda ash |
| CN114538477B (en) * | 2022-04-27 | 2022-09-02 | 天津渤化永利化工股份有限公司 | Improved production method of heavy soda ash |
| CN114644350A (en) * | 2022-05-23 | 2022-06-21 | 天津渤化永利化工股份有限公司 | Production method of heavy soda ash |
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Application publication date: 20101229 |