CN218393035U - Sodium bicarbonate production system - Google Patents
Sodium bicarbonate production system Download PDFInfo
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- CN218393035U CN218393035U CN202221839282.0U CN202221839282U CN218393035U CN 218393035 U CN218393035 U CN 218393035U CN 202221839282 U CN202221839282 U CN 202221839282U CN 218393035 U CN218393035 U CN 218393035U
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Abstract
A sodium bicarbonate generating system comprises a gas purifying device, a carbon capturing device and a carbonating device. The gas purification device is used for introducing sodium-containing electrolyte and flue waste gas from the outside to react to obtain purified gas and neutral sodium salt. The carbon capture device is communicated to the gas purification device and is used for capturing carbon dioxide in the purified gas. The carbonating device is communicated with the gas purification device and the carbon capture device and is used for introducing alkaline substances from the outside to be contacted with the neutral sodium salt and the carbon dioxide captured by the carbon capture device so as to obtain sodium bicarbonate through reaction. The sodium bicarbonate generation system can convert flue waste gas containing acid gas into sodium bicarbonate, and can recycle the neutral sodium salt so as to avoid environmental pollution caused by the fact that the neutral sodium salt becomes waste.
Description
Technical Field
The present invention relates to a sodium bicarbonate production system, and more particularly to a sodium bicarbonate production system including a gas purification device, a carbon capture device, and a carbonation device.
Background
In the existing sodium bicarbonate generation system, a sodium carbonate solution is generally introduced into a carbonization tower, carbon dioxide is introduced into the carbonization tower for carbonation, and then a sodium bicarbonate finished product is obtained through separation, drying and crushing.
However, the conventional sodium bicarbonate production system described above uses sodium carbonate as a raw material, so that the cost of the produced sodium bicarbonate is high, and the application of the sodium bicarbonate to environmental engineering is also limited, and for example, it is disadvantageous to the removal of acidic gases such as hydrogen chloride (HCl) and sulfur oxides (SOx) in exhaust gas.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sodium bicarbonate produces system can overcome above-mentioned background art's shortcoming.
Sodium bicarbonate produces system, be applicable to and convert the flue waste gas that contains acid gas and carbon dioxide into sodium bicarbonate. The sodium bicarbonate generating system comprises a gas purifying device, a carbon capturing device and a carbonating device. The gas purification device is used for introducing sodium-containing electrolyte and the flue waste gas from the outside to react to obtain purified gas and neutral sodium salt. The carbon capture device is communicated to the gas purification device and is used for capturing carbon dioxide in the purified gas. The carbonating device is communicated with the gas purification device and the carbon capture device and is used for introducing alkaline substances from the outside to be contacted with the neutral sodium salt and the carbon dioxide captured by the carbon capture device so as to obtain sodium bicarbonate through reaction.
The following will explain the present invention in detail:
preferably, the sodium bicarbonate production system of the present invention further comprises a solid-liquid separation device, which is connected to the carbonator and is used for separating the sodium bicarbonate solid obtained from the carbonator, and performing subsequent drying and grinding to form a powder form.
Preferably, the sodium-containing electrolyte introduced into the gas cleaning device comprises sodium bicarbonate obtained from the carbonator. More preferably, the sodium bicarbonate introduced into the gas purification device is injected into the gas purification device in the form of powder by spraying, and at least part of the sodium bicarbonate is decomposed by heat to form porous sodium carbonate (Na) 2 CO 3 ) To contact the flue gas.
Preferably, the sodium bicarbonate generating system of the present invention further comprises a gas storage tank connected to the carbon capture device and the carbonator for receiving and storing the carbon dioxide captured by the carbon capture device and for introducing the carbon dioxide into the carbonator.
Preferably, the sodium-containing electrolyte is selected from sodium hydroxide (NaOH), sodium carbonate (Na) 2 CO 3 ) Sodium bicarbonate (NaHCO) 3 ) Sodium chlorite (NaClO) 2 ) Sodium chlorate (NaClO) 3 ) Or a combination thereof.
Preferably, the neutral sodium salt is selected from sodium nitrate (NaNO) 3 ) Sodium chloride (NaCl), sodium sulfite (Na) 2 SO 3 ) Sodium sulfate (Na) 2 SO 4 ) Or a combination thereof.
Preferably, the alkaline substance is selected from calcium hydroxide powder or ammonia.
Preferably, the gas purification device comprises a filter bag for containing the sodium-containing electrolyte and the neutral sodium salt.
Preferably, the carbon capture device is selected from an absorption tower (absorber) or a supergravity apparatus.
Preferably, the carbonator is selected from an absorption tower (absorption tower), a high gravity apparatus, or a stirred tank.
The beneficial effects of the utility model reside in that: the sodium bicarbonate generation system can convert flue waste gas containing acid gas into sodium bicarbonate, and can recycle the neutral sodium salt so as to avoid environmental pollution caused by the fact that the neutral sodium salt becomes waste.
Drawings
Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings, in which:
figure 1 is a schematic diagram of the architecture of an embodiment of the sodium bicarbonate production system of the present invention.
Detailed Description
Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.
The invention will be further described with respect to the following examples, but it should be understood that the examples are for illustration only and should not be construed as limiting the practice of the invention.
Referring to fig. 1, the present invention is adapted to contain acid gas and carbon dioxide (CO) 2 ) Flue gas is converted to sodium bicarbonate (NaHCO) 3 ) The embodiment of the sodium bicarbonate production system of (1) includes a gas purification apparatus 1, a carbon capture apparatus 2, a carbonator 3, a solid-liquid separation apparatus 4, and a gas storage tank 5.
The gas purification device 1 is used for introducing sodium-containing electrolyte and the flue waste gas from the outside to react to obtain purified gas and neutral sodium salt. The sodium-containing electrolyte is selected from sodium hydroxide (NaOH), sodium carbonate (Na) 2 CO 3 ) Sodium bicarbonate (NaHCO) 3 ) Sodium chlorite (NaClO) 2 ) Sodium chlorate (NaClO) 3 ) Or a combination thereof. The gas purification device 1 comprises a filter bag 11, and the filter bag 11 is used for containing the sodium-containing electrolyte and the neutral sodium salt.
The carbon capture device 2 is connected to the gas purification device 1 for capturing carbon dioxide in the purified gas. The carbon capture device 2 is selected from an absorption tower (absorber) or a supergravity apparatus. In an implementation aspect of the present embodiment, the carbon capture device 2 is a supergravity device.
The carbonating device 3 is communicated with the gas purifying device 1 and the carbon capturing device 2 and is used for introducing alkaline substances from the outside to be contacted with the neutral sodium salt and the carbon dioxide captured by the carbon capturing device 2 for reaction to obtain carbonic acidSodium hydrogen carbonate. The carbonator 3 is selected from an absorption tower (absorber tower), a high gravity device or a stirred tank. The alkaline substance is selected from calcium hydroxide powder or ammonia. The neutral sodium salt is selected from sodium nitrate (NaNO) 3 ) Sodium chloride (NaCl), sodium sulfite (Na) 2 SO 3 ) Sodium sulfate (Na) 2 SO 4 ) Or a combination thereof. In an implementation of the present embodiment, the carbonator 3 is a supergravity device.
The solid-liquid separator 4 is connected to the carbonator 3 and is used to separate the sodium bicarbonate solid obtained from the carbonator 3 (e.g., by filtration), and then to perform subsequent drying and grinding to form a powder form.
The gas storage tank 5 is connected to the carbon capture device 2 and the carbonator 3, and is used for receiving and storing the carbon dioxide captured by the carbon capture device 2 and introducing the carbon dioxide into the carbonator 3.
In an embodiment of the present embodiment, the sodium-containing electrolyte introduced into the gas purification apparatus 1 from the outside is sodium hydroxide (NaOH) to react with an acid gas (e.g., NO) contained in the flue gas 2 、HNO 3 、HCl、SO 2 ) The following chemical reactions were carried out:
2NaOH+2NO 2 →NaNO 3 +NaNO 2 +H 2 O
NaOH+HNO 3 →NaNO 3 +H 2 O
NaOH+HCl→NaCl+H 2 O
2NaOH+SO 2 →Na 2 SO 3 +H 2 O
4NaOH+2SO 2 +O 2 →2Na 2 SO 4 +2H 2 O
in another embodiment of the present embodiment, the sodium-containing electrolyte introduced into the gas purification apparatus 1 from the outside is sodium bicarbonate. In some embodiments of the present embodiment, the sodium-containing electrolyte introduced into the gas purification apparatus 1 comprises sodium bicarbonate obtained from the carbonator 3. More specifically, the sodium bicarbonate introduced into the gas purification device 1 is injected into the gas purification device 1 in the form of powder by sprayingIn the filter bag 11, at least part of the sodium carbonate is decomposed by heat to form porous sodium carbonate (Na) 2 CO 3 ) The following chemical reaction formula shows:
2NaHCO 3 →Na 2 CO 3 +H 2 O+CO 2
the flue gas then contains acid gases (e.g., NO) 2 、HNO 3 、HCl、SO 2 ) Contacting with the porous sodium carbonate to perform the following chemical reaction:
Na 2 CO 3 +2NO 2 →NaNO 3 +NaNO 2 +CO 2
Na 2 CO 3 +2HNO 3 →2NaNO 3 +H 2 O+CO 2
Na 2 CO 3 +2HCl→2NaCl+H 2 O+CO 2
2Na 2 CO 3 +2SO 2 +O 2 →2Na 2 SO 4 +2CO 2
in another embodiment of this embodiment, the sodium-containing electrolyte introduced into the gas purification apparatus 1 from the outside is sodium chlorite (NaClO) 2 ) And introducing hydrochloric acid (HCl) from the outside to generate chlorine dioxide (ClO) 2 ) And sodium chloride (NaCl). Then, nitric Oxide (NO) contained in the flue gas is brought into contact with the chlorine dioxide to generate nitrogen dioxide (NO) 2 ) And hydrogen chloride (HCl); nitrogen dioxide (NO) contained in the flue gas 2 ) Contacting with said chlorine dioxide to produce nitric acid (HNO) 3 ) And hydrogen chloride (HCl). Finally, the flue gas contains acid gases (e.g., NO) 2 、HNO 3 、HCl、SO 2 ) And contacting with the porous sodium carbonate to perform the above chemical reaction.
In another embodiment of this embodiment, the sodium-containing electrolyte introduced into the gas purification apparatus 1 from the outside is sodium chlorate (NaClO) 3 ) And introducing sulfuric acid (H) from the outside 2 SO 4 ) And a reducing agent (for example: hydrogen peroxide or oxalic acid) to generate chlorine dioxide (ClO) 2 ) And sodium sulfate (Na) 2 SO 4 ). Then, the flue gas containsIs contacted with the chlorine dioxide to produce nitrogen dioxide (NO) 2 ) And hydrogen chloride (HCl); nitrogen dioxide (NO) contained in the flue gas 2 ) Contacting with said chlorine dioxide to produce nitric acid (HNO) 3 ) And hydrogen chloride (HCl). Finally, the flue gas contains acid gases (e.g., NO) 2 、HNO 3 、HCl、SO 2 ) And contacting with the porous sodium carbonate to perform the above chemical reaction.
In an embodiment of the present embodiment, the alkaline substance introduced into the carbonator 3 from the outside is calcium hydroxide (Ca (OH) 2 ) And (3) powder. Calcium hydroxide powder and the NaNO 3 、NaCl、NaSO 4 And carbon dioxide captured by the carbon capture device 2, to obtain sodium bicarbonate by performing the following chemical reaction:
Ca(OH) 2 +2NaNO 3 +2CO 2 →2NaHCO 3 +Ca(NO 3 ) 2
Ca(OH) 2 +2NaCl+2CO 2 →2NaHCO 3 +CaCl 2
Ca(OH) 2 +Na 2 SO 4 +2CO 2 →2NaHCO 3 +CaSO 4
in another embodiment of this embodiment, the alkaline substance introduced into the carbonator 3 from the outside is ammonia (NH) 3 ). Ammonia with said NaNO 3 、NaCl、NaSO 4 And carbon dioxide captured by the carbon capture device 2, to obtain sodium bicarbonate by performing the following chemical reaction:
NH 3 +H 2 O+NaNO 3 +CO 2 →NaHCO 3 +NH 4 NO 3
NH 3 +H 2 O+NaCl+CO 2 →NaHCO 3 +NH 4 Cl
2NH 3 +2H 2 O+Na 2 SO 4 +2CO 2 →2NaHCO 3 +(NH 4 ) 2 SO 4
in this embodiment, calcium hydroxide (Ca (OH)) can be further introduced 2 ) With the above NH 4 NO 3 、NH 4 Cl、(NH 4 ) 2 SO 4 Reacting to carry out the following chemical reaction and recovering the obtained ammonia:
2NH 4 NO 3 +Ca(OH) 2 →2NH 3 +2H 2 O+Ca(NO 3 ) 2
2NH 4 Cl+Ca(OH) 2 →2NH 3 +2H 2 O+CaCl 2
(NH 4 ) 2 SO 4 +Ca(OH) 2 →2NH 3 +2H 2 O+CaSO 4
to sum up, the utility model discloses sodium bicarbonate produces the system through this gas purification device 1, this carbon capture device 2 and this carbonator 3's intercommunication configuration to through with this contain sodium electrolyte introduce this gas purification device 1 in with producing this neutral sodium salt, and the carbon dioxide that this carbon capture device 2 was caught contacts with this alkaline substance in this carbonator 3, can convert the flue waste gas that contains acid gas into sodium bicarbonate, and can recycle this neutral sodium salt, become the discarded object and the polluted environment with avoiding this neutral sodium salt, so can reach the purpose of the utility model really.
The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the contents of the specification should be included in the scope of the present invention.
Claims (6)
1. A sodium bicarbonate production system adapted to convert flue gas containing acid gases and carbon dioxide into sodium bicarbonate, comprising: the sodium bicarbonate production system comprises:
the gas purification device is used for introducing sodium-containing electrolyte and the flue waste gas from the outside to react to obtain purified gas and neutral sodium salt;
the carbon capture device is communicated with the gas purification device and is used for capturing carbon dioxide in the purified gas; and
and the carbonating device is communicated with the gas purification device and the carbon capture device and is used for introducing an alkaline substance from the outside to be contacted with the neutral sodium salt and the carbon dioxide captured by the carbon capture device so as to react to obtain the sodium bicarbonate.
2. Sodium bicarbonate generation system according to claim 1, characterized in that: the sodium bicarbonate generating system also comprises a solid-liquid separating device which is communicated with the carbonating device and is used for separating sodium bicarbonate solid obtained from the carbonating device and carrying out subsequent drying and grinding to form powder.
3. Sodium bicarbonate production system according to claim 1, characterized in that: and a gas storage tank, which is communicated with the carbon capture device and the carbonator, is used for receiving and storing the carbon dioxide captured by the carbon capture device and introducing the carbon dioxide into the carbonator.
4. Sodium bicarbonate generation system according to claim 1, characterized in that: the gas purification device comprises a filter bag, and the filter bag is used for accommodating the sodium-containing electrolyte and the neutral sodium salt.
5. Sodium bicarbonate production system according to claim 1, characterized in that: the carbon capture device is selected from an absorption tower or a supergravity device.
6. Sodium bicarbonate production system according to claim 1, characterized in that: the carbonator is selected from an absorption tower, a super-gravity device, or a stirred tank.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115945054A (en) * | 2023-03-15 | 2023-04-11 | 苏州仕净科技股份有限公司 | CO (carbon monoxide) 2 Method for absorbing, desorbing and utilizing solid waste as resource |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115945054A (en) * | 2023-03-15 | 2023-04-11 | 苏州仕净科技股份有限公司 | CO (carbon monoxide) 2 Method for absorbing, desorbing and utilizing solid waste as resource |
| CN115945054B (en) * | 2023-03-15 | 2023-09-08 | 苏州仕净科技股份有限公司 | CO (carbon monoxide) 2 Method for absorbing and desorbing solid waste resource utilization |
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