CN110015669B - Sodium bicarbonate preparation method and equipment - Google Patents
Sodium bicarbonate preparation method and equipment Download PDFInfo
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- CN110015669B CN110015669B CN201910111221.9A CN201910111221A CN110015669B CN 110015669 B CN110015669 B CN 110015669B CN 201910111221 A CN201910111221 A CN 201910111221A CN 110015669 B CN110015669 B CN 110015669B
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- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/10—Preparation of bicarbonates from carbonates
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Abstract
The invention provides sodium bicarbonate preparation equipment, which comprises a dissolving tank, a liquid storage tank, a carbon dioxide gas storage tank, a spiral twisted flat pipe, a crystallization tank, a centrifugal machine and an airflow dryer, wherein the dissolving tank is arranged on the top of the dissolving tank; the dissolving tank is communicated with the liquid inlet of the liquid storage tank through a first liquid guide pipe, the flat pipe of spiral distortion is horizontally arranged, the feed inlet of the flat pipe of spiral distortion passes through a second liquid guide pipe, a first air guide pipe is respectively communicated with the liquid outlet of the liquid storage tank, the gas outlet of the carbon dioxide gas storage tank, the liquid conveying pump is arranged on the second liquid guide pipe, the air conveying pump is arranged on the first air guide pipe, the liquid outlet of the flat pipe of spiral distortion passes through the third liquid guide pipe and is communicated with the liquid inlet of the crystallizing tank, the liquid outlet of the crystallizing tank is communicated with a centrifugal machine through a fourth liquid guide pipe, and the solid outlet of the centrifugal machine is communicated with the air flow drying machine. The invention solves the problems of material deposition, hardening and blockage, material carbonization without deposition, improves the self-cleaning capability and production efficiency of equipment, simplifies the production device and operation, is easy to maintain and is suitable for industrial production.
Description
Technical Field
The invention relates to the technical field of sodium bicarbonate preparation, in particular to a method and equipment for preparing sodium bicarbonate.
Background
The industrial production of sodium bicarbonate for medicine uses sodium carbonate and carbon dioxide as raw materials, and is made up by using sodium carbonate and carbon dioxide as raw materials through the processes of dissolving, carbonizing, centrifuging and air-flow drying, in which the carbonization is implemented in carbonization tower, the heated and dissolved sodium carbonate aqueous solution is flowed into tower body from top of tower, at the same time the pressurized carbon dioxide is fed into tower from bottom of tower, and the carbonization reaction is implemented in the middle portion of tower body, and the reaction liquor is cooled from bottom of tower, and flowed out and separated. In order to improve the reaction efficiency and increase the gas-liquid contact area in the prior art, a layered spacer is arranged in a carbonization tower, gas-liquid reacts on the spacer and separates out sodium bicarbonate, so that material deposition and hardening are easily caused, gas-liquid mass transfer is influenced, production stop and cleaning are required regularly, in order to ensure normal production, a plurality of carbonization towers are generally adopted in the industry for cross use, the investment is large, the equipment resource occupancy rate is high, the operation is inconvenient, and the equipment maintenance cost is high.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method and equipment for preparing sodium bicarbonate.
The invention provides sodium bicarbonate preparation equipment, which comprises a dissolving tank, a liquid storage tank, a carbon dioxide gas storage tank, a spiral twisted flat pipe, a crystallization tank, a centrifugal machine and an airflow dryer, wherein the dissolving tank is arranged on the top of the dissolving tank; the dissolving tank is communicated with the liquid inlet of the liquid storage tank through a first liquid guide pipe, the flat pipe of spiral distortion is horizontally arranged, the feed inlet of the flat pipe of spiral distortion passes through a second liquid guide pipe, a first air guide pipe is respectively communicated with the liquid outlet of the liquid storage tank, the gas outlet of the carbon dioxide gas storage tank, the liquid conveying pump is arranged on the second liquid guide pipe, the air conveying pump is arranged on the first air guide pipe, the liquid outlet of the flat pipe of spiral distortion passes through the third liquid guide pipe and is communicated with the liquid inlet of the crystallizing tank, the liquid outlet of the crystallizing tank is communicated with a centrifugal machine through a fourth liquid guide pipe, and the solid outlet of the centrifugal machine is communicated with the air flow drying machine.
Preferably, a stirring mechanism is arranged in the dissolving tank, and the stirring temperature of the dissolving tank is 40-60 ℃.
Preferably, the spiral twisted flat tube is made of a general stainless steel material, and the cross section of the spiral twisted flat tube is oblate or oval.
Preferably, the ratio of the minor axis d1 of the spirally twisted flat tube to the major axis d2 thereof is 0.3-0.5, and the ratio of the pitch of the spirally twisted flat tube to the equivalent diameter thereof is 3-30.
Preferably, still include condenser and carbon dioxide compressor, the air inlet of condenser passes through the gas outlet intercommunication of second air duct and crystallizer, and the gas outlet of condenser passes through the air inlet intercommunication of third air duct and carbon dioxide compressor, and the gas outlet of carbon dioxide compressor passes through the air inlet intercommunication of fourth air duct and carbon dioxide gas holder.
Preferably, still include the mother liquor and retrieve the jar, the liquid inlet of mother liquor recovery jar passes through the liquid outlet intercommunication of fifth catheter and condenser, and the liquid outlet of mother liquor recovery jar passes through the liquid inlet intercommunication of sixth catheter and dissolving tank.
A preparation method of sodium bicarbonate comprises the following steps:
s1, adding sodium carbonate solid and purified water into a dissolving tank, controlling the retention time to be 0.1-0.3h, wherein the dissolving tank keeps stirring continuously, and then transferring the sodium carbonate solution obtained by dissolving into a liquid storage tank;
s2, introducing carbon dioxide in a carbon dioxide gas storage tank into the spiral twisted flat tube through the gas transmission pump, simultaneously introducing a sodium carbonate solution in the liquid storage tank into the spiral twisted flat tube through the liquid transmission pump, fully reacting the sodium carbonate solution and the carbon dioxide in the spiral twisted flat tube, and completely flowing into the crystallization tank along with gas flow for sedimentation and crystallization;
and S3, transferring the liquid in the crystallization tank to a centrifuge for centrifugal separation, and transferring the solid obtained by separation to a pneumatic drier for drying.
Preferably, in S1, the stirring temperature of the dissolving tank is 40-60 ℃; preferably, the mass percentage content of the sodium carbonate solution obtained from S1 is 40-50%.
Preferably, in S2, the carbon dioxide pressure is 0.1 to 0.3 MPa.
Preferably, in S3, the drying temperature of the pneumatic dryer is 110 ℃ to 140 ℃.
The invention provides sodium bicarbonate preparation equipment, which is characterized in that a sodium carbonate aqueous solution and carbon dioxide are introduced into a section of horizontally-arranged spiral twisted flat tube, the sodium carbonate and the carbon dioxide flow and are mixed and react quickly in a pipeline, then the sodium carbonate and the carbon dioxide are introduced into a cylindrical crystallization tank, the sodium bicarbonate is subjected to sedimentation and centrifugal separation, and residual mother liquor, excessive carbon dioxide and evaporated moisture are recycled after online collection. The invention solves the problems of material deposition, hardening and blockage, the sodium carbonate aqueous solution and the pressurized carbon dioxide are introduced into a section of horizontally arranged spiral twisted flat tube, flow in a cylindrical crystallization tank after fast flowing mixing reaction in a pipeline, are naturally settled and separated, the material is carbonized without deposition, the self-cleaning capacity and the production efficiency of equipment are improved, the production device and operation are simplified, the maintenance is easy, and the invention is suitable for industrial production.
Drawings
FIG. 1 is a schematic structural diagram of a sodium bicarbonate preparation apparatus according to the present invention;
FIG. 2 is a sectional view of a spiral twisted flat tube in a sodium bicarbonate preparation device according to the present invention;
fig. 3 is a sectional view of a spiral twisted flat tube in the sodium bicarbonate preparation equipment provided by the invention.
Detailed Description
Referring to fig. 1-3, the present invention provides a sodium bicarbonate preparation apparatus, including a dissolving tank 1, a liquid storage tank 2, a carbon dioxide gas storage tank 3, a spiral twisted flat tube 4, a crystallization tank 5, a centrifuge 6, an air flow dryer 7, a condenser 10, a carbon dioxide compressor 11 and a mother liquor recovery tank 12; wherein:
dissolving tank 1 communicates through the inlet of first catheter and liquid storage pot 2, be equipped with rabbling mechanism in dissolving tank 1, the flat 4 levels of spiral distortion are arranged, the feed inlet of the flat pipe 4 of spiral distortion passes through the second catheter, first air duct respectively with the liquid outlet of liquid storage pot 2, the gas outlet intercommunication of carbon dioxide gas holder 3, be equipped with transfer pump 8 on the second catheter, be equipped with air transmission pump 9 on the first air duct, the liquid outlet of the flat pipe 4 of spiral distortion passes through the inlet intercommunication of third catheter and crystallizer 5, the liquid outlet of crystallizer 5 passes through fourth catheter and centrifuge 6 intercommunication, centrifuge 6's solid outlet and pneumatic drier 7 intercommunication. The air inlet of condenser 10 passes through the gas outlet intercommunication of second air duct and crystallizer 5, and the gas outlet of condenser 10 passes through the air inlet intercommunication of third air duct and carbon dioxide compressor 11, and the gas outlet of carbon dioxide compressor 11 passes through the air inlet intercommunication of fourth air duct and carbon dioxide gas holder 3. The liquid inlet of the mother liquor recovery tank 12 is communicated with the liquid outlet of the condenser 10 through a fifth liquid guide pipe, and the liquid outlet of the mother liquor recovery tank 12 is communicated with the liquid inlet of the dissolving tank 1 through a sixth liquid guide pipe.
In this embodiment, the spirally twisted flat tube 4 is made of a general stainless steel material, the cross section of the spirally twisted flat tube 4 is in an oblate or oval shape, the ratio of the minor axis d1 of the spirally twisted flat tube 4 to the major axis d2 thereof is 0.3-0.5, and the ratio of the pitch of the spirally twisted flat tube 4 to the equivalent diameter thereof is 3-30.
The invention also provides a preparation method of the sodium bicarbonate, which comprises the following steps:
s1, adding sodium carbonate solid and purified water into the dissolving tank 1, controlling the retention time to be 0.1-0.3h, wherein the dissolving tank 1 keeps continuously stirring at the stirring temperature of 40-60 ℃, and then transferring the dissolved sodium carbonate solution with the mass percentage of 40-50% into the liquid storage tank 2;
s2, introducing carbon dioxide in a carbon dioxide gas storage tank 3 with the pressure of 0.1-0.3MPa into the spiral twisted flat tube 4 through the gas transmission pump 9, simultaneously introducing a sodium carbonate solution in the liquid storage tank 2 into the spiral twisted flat tube 4 through the liquid transmission pump 8, fully reacting the sodium carbonate solution with the carbon dioxide in the spiral twisted flat tube 4, and completely flowing into the crystallization tank 5 along with the gas flow for sedimentation and crystallization;
s3, transferring the liquid in the crystallization tank 5 to a centrifuge 6 for centrifugal separation, transferring the separated solid to an air flow dryer 7 for drying, wherein the drying temperature of the air flow dryer 7 is 110-140 ℃.
According to the invention, a sodium carbonate aqueous solution and carbon dioxide are introduced into a section of horizontally-installed spiral twisted flat tube 4, the sodium carbonate and the carbon dioxide rapidly flow in a pipeline, are mixed and react, and are introduced into a cylindrical crystallization tank 5, sodium bicarbonate is subjected to sedimentation and centrifugal separation, and residual mother liquor, excessive carbon dioxide and evaporated water are recycled after online collection. The invention solves the problems of material deposition, hardening and blockage, the sodium carbonate aqueous solution and the pressurized carbon dioxide are introduced into a section of horizontally arranged spiral twisted flat tube, flow in a cylindrical crystallization tank after fast flowing mixing reaction in a pipeline, are naturally settled and separated, the material is carbonized without deposition, the self-cleaning capacity and the production efficiency of equipment are improved, the production device and operation are simplified, the maintenance is easy, and the invention is suitable for industrial production.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The sodium bicarbonate preparation equipment is characterized by comprising a dissolving tank (1), a liquid storage tank (2), a carbon dioxide gas storage tank (3), a spiral twisted flat tube (4), a crystallization tank (5), a centrifugal machine (6) and an air flow dryer (7); the dissolving tank (1) is communicated with a liquid inlet of the liquid storage tank (2) through a first liquid guide pipe, the spiral twisted flat pipes (4) are horizontally arranged, a feed inlet of each spiral twisted flat pipe (4) is communicated with a liquid outlet of the liquid storage tank (2) and a gas outlet of the carbon dioxide gas storage tank (3) through a second liquid guide pipe, a liquid transfer pump (8) is arranged on each second liquid guide pipe, a gas transfer pump (9) is arranged on each first liquid guide pipe, the liquid outlet of each spiral twisted flat pipe (4) is communicated with a liquid inlet of the crystallizing tank (5) through a third liquid guide pipe, the liquid outlet of the crystallizing tank (5) is communicated with the centrifugal machine (6) through a fourth liquid guide pipe, and a solid outlet of the centrifugal machine (6) is communicated with the pneumatic dryer (7);
the spiral twisted flat tube (4) is made of a general stainless steel material, and the cross section of the spiral twisted flat tube (4) is oblate or oval;
the ratio of the short axis d1 of the spirally twisted flat tube (4) to the long axis d2 thereof is 0.3-0.5, and the ratio of the pitch of the spirally twisted flat tube (4) to the equivalent diameter thereof is 3-30.
2. The sodium bicarbonate preparation apparatus according to claim 1, wherein the dissolving tank (1) is provided with a stirring mechanism therein, and the stirring temperature of the dissolving tank (1) is 40 ℃ to 60 ℃.
3. The sodium bicarbonate preparation equipment according to claim 1 or 2, further comprising a condenser (10) and a carbon dioxide compressor (11), wherein the air inlet of the condenser (10) is communicated with the air outlet of the crystallization tank (5) through a second air duct, the air outlet of the condenser (10) is communicated with the air inlet of the carbon dioxide compressor (11) through a third air duct, and the air outlet of the carbon dioxide compressor (11) is communicated with the air inlet of the carbon dioxide storage tank (3) through a fourth air duct.
4. The sodium bicarbonate preparation equipment according to claim 3, further comprising a mother liquor recovery tank (12), wherein a liquid inlet of the mother liquor recovery tank (12) is communicated with a liquid outlet of the condenser (10) through a fifth liquid guide pipe, and a liquid outlet of the mother liquor recovery tank (12) is communicated with a liquid inlet of the dissolving tank (1) through a sixth liquid guide pipe.
5. A method for producing sodium bicarbonate by using the production apparatus according to any one of claims 1 to 4, comprising the steps of:
s1, adding sodium carbonate solid and purified water into the dissolving tank (1), controlling the retention time to be 0.1-0.3h, wherein the dissolving tank (1) keeps stirring continuously, and then transferring the dissolved sodium carbonate solution into a liquid storage tank (2);
s2, introducing carbon dioxide in a carbon dioxide gas storage tank (3) into the spiral twisted flat tube (4) through a gas transmission pump (9), simultaneously inputting a sodium carbonate solution in the liquid storage tank (2) into the spiral twisted flat tube (4) through a liquid transmission pump (8), fully reacting the sodium carbonate solution and the carbon dioxide in the spiral twisted flat tube (4), and completely flowing into a crystallization tank (5) along with gas flow for sedimentation and crystallization;
s3, transferring the liquid in the crystallization tank (5) to a centrifuge (6) for centrifugal separation, and transferring the solid obtained by separation to a pneumatic dryer (7) for drying.
6. The method for preparing sodium bicarbonate according to claim 5, wherein in S1, the stirring temperature of the dissolving tank (1) is 40-60 ℃; preferably, the mass percentage content of the sodium carbonate solution obtained from S1 is 40-50%.
7. The method for producing sodium hydrogencarbonate according to claim 6, wherein a carbon dioxide pressure in S2 is 0.1 to 0.3 MPa.
8. The method of claim 6, wherein the drying temperature of the pneumatic dryer (7) in S3 is 110 ℃ to 140 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910111221.9A CN110015669B (en) | 2019-02-12 | 2019-02-12 | Sodium bicarbonate preparation method and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910111221.9A CN110015669B (en) | 2019-02-12 | 2019-02-12 | Sodium bicarbonate preparation method and equipment |
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| CN110015669A CN110015669A (en) | 2019-07-16 |
| CN110015669B true CN110015669B (en) | 2021-10-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076425A (en) * | 1993-04-17 | 1993-09-22 | 郑州工学院 | Active sodium bicarbonate and manufacture method thereof |
| CN103183369A (en) * | 2011-12-28 | 2013-07-03 | 北京有色金属研究总院 | Apparatus and method for pipeline continuous carbonization of calcium and magnesium |
| CN103601227A (en) * | 2013-09-11 | 2014-02-26 | 宜兴天力化工纳米科技有限公司 | Pre-nucleation reactor of nanometer calcium carbonate and preparation technology of the nanometer calcium carbonate |
| CN108358220A (en) * | 2018-03-07 | 2018-08-03 | 武汉德泽环保科技有限公司 | A kind of method and apparatus producing sodium bicarbonate |
| CN108726542A (en) * | 2018-09-04 | 2018-11-02 | 北京烨晶科技有限公司 | The production method and production equipment of sodium bicarbonate |
-
2019
- 2019-02-12 CN CN201910111221.9A patent/CN110015669B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076425A (en) * | 1993-04-17 | 1993-09-22 | 郑州工学院 | Active sodium bicarbonate and manufacture method thereof |
| CN103183369A (en) * | 2011-12-28 | 2013-07-03 | 北京有色金属研究总院 | Apparatus and method for pipeline continuous carbonization of calcium and magnesium |
| CN103601227A (en) * | 2013-09-11 | 2014-02-26 | 宜兴天力化工纳米科技有限公司 | Pre-nucleation reactor of nanometer calcium carbonate and preparation technology of the nanometer calcium carbonate |
| CN108358220A (en) * | 2018-03-07 | 2018-08-03 | 武汉德泽环保科技有限公司 | A kind of method and apparatus producing sodium bicarbonate |
| CN108726542A (en) * | 2018-09-04 | 2018-11-02 | 北京烨晶科技有限公司 | The production method and production equipment of sodium bicarbonate |
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| CN110015669A (en) | 2019-07-16 |
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