CN218573263U - Novel production system of high-quality sodium sulfite - Google Patents
Novel production system of high-quality sodium sulfite Download PDFInfo
- Publication number
- CN218573263U CN218573263U CN202221575010.4U CN202221575010U CN218573263U CN 218573263 U CN218573263 U CN 218573263U CN 202221575010 U CN202221575010 U CN 202221575010U CN 218573263 U CN218573263 U CN 218573263U
- Authority
- CN
- China
- Prior art keywords
- sodium sulfite
- absorption tower
- production system
- quality
- links
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model provides a novel production system of high-quality sodium sulfite belongs to the chemical industry field. This production system includes second grade absorption tower and one-level absorption tower, and the output at second grade absorption tower and one-level absorption tower top all links to each other through the lower part of pipeline an with the sodium sulfite absorption tower, and sodium sulfite storage tank, reation kettle and concentrator bowl are passed through to the bottom of sodium sulfite absorption tower and link to each other, and the alkali lye dissolving tank passes through the alkali lye aqueduct and links to each other with the sodium sulfite absorption tower. The process system utilizes the tail gas discharged in the production of sulfuric acid to be mixed with the sulfur dioxide-containing furnace gas at the outlet of the primary absorption tower to prepare the high-purity sodium sulfite, so that the sulfuric acid tail gas resource is utilized, the environmental pollution is reduced, and meanwhile, great economic benefits are brought.
Description
Technical Field
The utility model relates to a chemical industry field, concretely relates to novel production system of high-quality sodium sulfite.
Background
Anhydrous sodium sulfite (Na) 2 SO 3 ) The method is characterized in that the method is an inorganic raw material commonly used in the chemical industry field, sulfur dioxide is generated by burning sulfur at present, the sulfur dioxide reacts with alkali liquor with certain concentration to obtain sodium bisulfite solution, sodium sulfite solution is obtained by neutralizing with sodium hydroxide, and then anhydrous sodium sulfite is obtained by drying. However, in the production process, the tail gas and the gas merged into the first-stage absorption tower contain a large amount of oxygen, and sodium sulfate or sodium bisulfite can be generated together with sodium sulfite, so that the yield of sodium sulfite is reduced; in addition, the gas at the outlet of the absorption tower also contains a small amount of sulfur trioxide, and side reaction can also occur to generate sodium sulfate, which affects the quality of sodium sulfite.
The conversion rate of sulfur dioxide in the production process of sulfuric acid is generally 99.7-99.9%, and the sulfur dioxide content in the tail gas discharged by absorbing sulfuric acid is higher than the national specified sulfur dioxide discharge standard (400 mg/m) 3 ) The tail gas can reach the standard after being subjected to desulfurization treatment, so that how to utilize the sulfuric acid tail gas in a recycling manner is crucial to sulfuric acid production.
SUMMERY OF THE UTILITY MODEL
The utility model discloses technical problem to the aforesaid exists provides a novel production system of high-quality sodium sulfite.
The purpose of the utility model can be realized by the following technical proposal:
the utility model provides a production system of novel high-quality sodium sulfite, this production system includes second grade absorption tower and one-level absorption tower, and the output at second grade absorption tower and one-level absorption tower top all links to each other through the lower part of pipeline an with the sodium sulfite absorption tower, and sodium sulfite storage tank, reation kettle and concentrated pot are passed through to the bottom of sodium sulfite absorption tower and are linked to each other, and the alkali lye dissolving tank crosses the aqueduct through alkali lye and links to each other with the sodium sulfite absorption tower.
The utility model discloses among the technical scheme: be equipped with the sodium sulfite absorption pump between sodium sulfite absorption tower and the sodium sulfite storage tank, sodium sulfite absorption pump still have an output to link to each other with pipeline an.
The utility model discloses among the technical scheme: a sodium sulfite delivery pump is arranged between the sodium sulfite storage tank and the reaction kettle.
The utility model discloses among the technical scheme: a reaction kettle pump is arranged between the reaction kettle and the concentration pot.
The utility model discloses among the technical scheme: and a chimney is arranged at the top of the sodium sulfite absorption tower.
A method for producing sodium sulfite by using the production system has the following specific scheme:
sodium hydroxide (NaOH) solution is used as tail gas circulating absorption liquid, tail gas from the outlet of the secondary absorption tower and the merged flue gas at the outlet of the primary absorption tower enter the gas inlet of a sodium sulfite absorption tower and are in gas-liquid contact with the circulating absorption liquid until the pH value of the liquid is 5.0-6.0, and acid sodium sulfite (Na) is obtained 2 SO 3 ) And (3) solution. In order to prevent the sulfite in the solution from being oxidized during absorption, a small amount of oxygen inhibitor needs to be added into the circulating liquid of the primary absorption tower to inhibit the oxidation reaction. Neutralizing the obtained sodium sulfite solution with sodium carbonate solution until pH is approximately equal to 7, heating to boil to drive off carbon dioxide, and continuously adding sodium carbonate (Na) 2 CO 3 ) When the solution was adjusted to pH =12, an alkaline buffer solution was prepared to inhibit oxidation of sodium sulfite. The produced sodium sulfite product is sent into a sodium sulfite storage tank, and anhydrous sodium sulfite is obtained after heating, concentration, evaporation and crystallization.
The method comprises the following steps: the concentration of the sodium hydroxide solution is 10-20%.
The method comprises the following steps: adding oxygen-resisting agent p-phenylenediamine or dimethyl p-phenylenediamine (analytical pure reagent) into the circulating absorption liquid, wherein the adding amount is 1/120000 of the solid sodium hydroxide.
The method comprises the following steps: the PH value of the circulating absorption liquid is 5.6-6.0.
The utility model has the advantages that:
the utility model discloses in the process of the production technology to sulphuric acid, when sulfur dioxide preparation sodium sulfite in purification flue gas or the absorption tower export gas, the side reaction can take place, sodium sulfite is by oxygen oxidation formation sodium sulfate promptly to influence the output and the quality of sodium sulfite, this process systems utilizes the tail gas that production sulphuric acid discharged and the export of one-level absorption tower to contain sulfur dioxide burner gas and mix the back and prepare high-purity sodium sulfite, with sulphuric acid tail gas utilization, when reducing environmental pollution, bring very big economic benefits.
Drawings
FIG. 1 is a process flow diagram of the present invention wherein: 1-alkali liquor dissolving tank, 2-alkali liquor transition tank, 3-alkali liquor transition tank circulating pump, 4-sodium sulfite absorption tower, 5-secondary absorption tower, 6-primary absorption tower, 7-chimney, 8-sodium sulfite absorption pump, 9-sodium sulfite storage tank, 10-sodium sulfite delivery pump, 11-reaction kettle, 12-reaction kettle pump and 13-concentration kettle.
Detailed Description
The present invention will be further explained with reference to the following embodiments, but the scope of the present invention is not limited thereto:
as shown in figure 1, a novel production system of high-quality sodium sulfite, this production system includes second grade absorption tower 5 and one-level absorption tower 6, the output at second grade absorption tower 5 and one-level absorption tower 6 top all links to each other with the lower part of sodium sulfite absorption tower 4 through pipeline a, the bottom of sodium sulfite absorption tower 4 links to each other through sodium sulfite storage tank 9, reation kettle 11 and concentrated pot 13, alkali lye dissolving tank 1 crosses aqueduct 2 through the alkali lye and links to each other with sodium sulfite absorption tower 4. Be equipped with sodium sulfite absorption pump 8 between sodium sulfite absorption tower 4 and the sodium sulfite storage tank 9, sodium sulfite absorption pump 8 still have an output to link to each other with pipeline a. A sodium sulfite delivery pump 10 is arranged between the sodium sulfite storage tank 9 and the reaction kettle 11. A reaction kettle pump 12 is arranged between the reaction kettle 11 and the concentration kettle 13. And a chimney 7 is arranged at the top of the sodium sulfite absorption tower 4.
Example one
The tail gas of a certain company which has an existing 80-ten-thousand-ton/year sulfuric acid production line contains about 0.2 percent of sulfur dioxide, and the gas amount per hour reaches 360000m 3 Above, the direct discharge into the atmosphere through the chimney corresponds to the discharge of 100% sulfuric acid equivalent to 2t from the chimney per 1 ton of 100% sulfuric acid produced. A large amount of tail gases are discharged, resources are wasted, air pollution is serious, the capacity of sodium sulfite of the company reaches 24 kilotons per year after the process technology is improved, high-quality products meeting national standards can be produced, and the sulfur dioxide content in the final tail gases is lower than 10mg/Nm 3 。
The temperature of the tail gas entering the sodium sulfite absorption tower (4) is 60 ℃, and the content of sulfur dioxide is 0.2%;
circulating absorption: adding p-phenylenediamine with the amount of 1/120000 of sodium hydroxide as an oxygen inhibitor into 16 percent of sodium hydroxide, adding 20 percent of sodium carbonate solution with the amount of 5 percent of sodium hydroxide, beating the mixture to the top of a sodium sulfite absorption tower 4 by an alkali liquor transition tank circulating pump 3, and spraying the mixture; meanwhile, pumping the sulfuric acid tail gas to the bottom of the tower by using an air blower, and carrying out gas-liquid contact in a counter-current mode to obtain an acidic sodium sulfite solution with the content of 4 percent at the time of 30 ℃. The sulfur dioxide content in the tail gas of the sodium sulfite absorption tower 4 is 0.01 percent.
Neutralizing and removing impurities: the acidic sodium sulfite solution is conveyed to a reaction kettle 11 by a sodium sulfite delivery pump 10, neutralized to pH 7 by 20 percent sodium carbonate solution, indirectly heated to boiling by steam with the pressure of 0.4MPa, the carbon dioxide is driven off, and continuously added with the sodium carbonate solution for neutralization to pH =12 to prepare alkaline buffer solution. Adding a small amount of active carbon for decolorization, and filtering with cloth bag to obtain colorless sodium sulfite clear solution with a content of 21%.
Concentration and crystallization: the sodium sulfite solution is sent to a concentration pot 13, is indirectly heated by steam with the pressure of 0.4MPa, and new sodium sulfite clear solution is continuously added to keep a certain liquid level so as to prevent the generation of 'rice crust'. Heating, concentrating, evaporating and crystallizing until a certain amount of anhydrous sodium sulfite is separated out, drying in a centrifuge, recycling the absorption liquid, and controlling the content of crystal water after drying to be 3%.
And (3) drying and packaging: the cold air is heated to 200-250 ℃ by an electric heating furnace, the hot air dries the dried sodium sulfite crystal, and the dried sodium sulfite crystal is separated by a cyclone separator and then packaged. The content of sodium sulfite in the final product is more than 96 percent, and first-grade high-quality sodium sulfite white crystal powder is obtained.
Claims (5)
1. The utility model provides a production system of novel high-quality sodium sulfite which characterized in that: this production system includes second grade absorption tower (5) and one-level absorption tower (6), the output at second grade absorption tower (5) and one-level absorption tower (6) top all links to each other through the lower part of pipeline an with sodium sulfite absorption tower (4), sodium sulfite storage tank (9) is passed through to the bottom of sodium sulfite absorption tower (4), reation kettle (11) and concentrated pot (13) link to each other, alkali lye dissolving tank (1) crosses aqueduct (2) through alkali lye and links to each other with sodium sulfite absorption tower (4).
2. The system for producing the novel high-quality sodium sulfite according to claim 1, which is characterized in that: sodium sulfite absorption pump (8) is equipped with between sodium sulfite absorption tower (4) and sodium sulfite storage tank (9), sodium sulfite absorption pump (8) still have an output to link to each other with pipeline an.
3. The system for producing novel high-quality sodium sulfite of claim 1, wherein: a sodium sulfite delivery pump (10) is arranged between the sodium sulfite storage tank (9) and the reaction kettle (11).
4. The system for producing the novel high-quality sodium sulfite according to claim 1, which is characterized in that: a reaction kettle pump (12) is arranged between the reaction kettle (11) and the concentration kettle (13).
5. The system for producing the novel high-quality sodium sulfite according to claim 1, which is characterized in that: a chimney (7) is arranged at the top of the sodium sulfite absorption tower (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221575010.4U CN218573263U (en) | 2022-06-22 | 2022-06-22 | Novel production system of high-quality sodium sulfite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221575010.4U CN218573263U (en) | 2022-06-22 | 2022-06-22 | Novel production system of high-quality sodium sulfite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218573263U true CN218573263U (en) | 2023-03-07 |
Family
ID=85358548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221575010.4U Active CN218573263U (en) | 2022-06-22 | 2022-06-22 | Novel production system of high-quality sodium sulfite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218573263U (en) |
-
2022
- 2022-06-22 CN CN202221575010.4U patent/CN218573263U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110255585B (en) | Device and method for preparing sulfite | |
| CN101993085B (en) | Method for producing white carbon black for toothpaste from fly ash | |
| CN107758697A (en) | A kind of production method of industrial anhydrous sodium sulfite | |
| CN108584991B (en) | Low-chlorine photo-thermal molten salt production process and production device | |
| CN112093811A (en) | Sodium sulfite production method | |
| US4148684A (en) | Methods for recovery and recycling of chemicals from sodium sulfite and sodium bisulfite pulping operations | |
| CN109020839A (en) | A kind of ammonolysis ethylenehydrinsulfonic acid sodium prepares taurine utilization process | |
| CN102924956A (en) | Recovery, balance adjustment and comprehensive utilization technology for mixing alkali in indigo blue production | |
| CN101757844A (en) | Method and device for performing flue gas desulfurization by using ammonia process | |
| CN114436297B (en) | Method for preparing sodium carbonate from mirabilite | |
| CN109928370A (en) | A kind of technique that sulfur dioxide flue gas prepares the high-purity sodium sulfite of producing sulfuric acid and jointly | |
| CN218573263U (en) | Novel production system of high-quality sodium sulfite | |
| CN110562991A (en) | Production method of white carbon black for high-oil-absorption carrier | |
| CN109734106B (en) | Method for preparing high-concentration sodium bisulfite solution by using industrial waste | |
| CN105013317A (en) | Process flow for recovering high-purity magnesium sulfite by magnesium oxide flue gas desulphurization | |
| CN115536124B (en) | Quality and efficiency improving method for ammonium sulfate product produced by using flue gas desulfurization wastewater by adopting ammonia-acid method | |
| CN104592062B (en) | A kind of beta-naphthalenesulfonic-acid neutralizes and waste gas recovery method of comprehensive utilization and device thereof continuously | |
| CN218962222U (en) | System for recycling ammonia and by-product active calcium through ammonia-calcium desulfurization | |
| CN210419274U (en) | Device for preparing sulfite | |
| CN216073085U (en) | Household garbage incineration fly ash recycling treatment system | |
| CN106587494A (en) | Method for improving ammonia-nitrogen content of H acid wastewater | |
| CN106430247A (en) | Method for preparing high-concentration sodium hydroxide by ultrasonically intensifying sodium sulfate | |
| CN114516694A (en) | Waste acid treatment process for co-production of sodium metabisulfite | |
| CN209721679U (en) | A kind of sodium citrate parses the device of lean solution purification and its by-product gypsum whisker | |
| CN213294705U (en) | System for production sodium metabisulfite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |