CN101481166A - Method for processing sodium sulphite waste circulating mother liquor - Google Patents
Method for processing sodium sulphite waste circulating mother liquor Download PDFInfo
- Publication number
- CN101481166A CN101481166A CNA2009100776670A CN200910077667A CN101481166A CN 101481166 A CN101481166 A CN 101481166A CN A2009100776670 A CNA2009100776670 A CN A2009100776670A CN 200910077667 A CN200910077667 A CN 200910077667A CN 101481166 A CN101481166 A CN 101481166A
- Authority
- CN
- China
- Prior art keywords
- mother liquor
- waste
- acid
- sodium sulfite
- mother solution
- 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.)
- Pending
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention relates to a method for processing waste circulation mother solution of sodium sulfite, and relates to a method for processing waste mother solution of sodium sulfite in the process of producing sodium sulfite by using metallurgy smoke of low concentration, which is characterized in that sulphuric acid is added into waste circulation mother solution for reaction, sulfur dioxide gas generated by the reaction of the sulphuric acid and the waste circulation mother solution is guided out for acid production, and the solution of sodium sulfite generated by the reaction is used for producing the products of sodium sulfate. The method of the invention enables the mother solution in the process of producing sodium sulfite to be partially conducted open circuit, guarantees the continuous stability of product quality, enables the washing waste acid in the sulfate system to be comprehensively used, lowers the processing cost of the waste acid in the sulfate system, sufficiently uses the processed tail solution, produces a side product which is glauber salt, and increases the economic benefit. The method has the characteristics of continuous and automatic technology, short operation time and low labor intensity, and is the technology of processing the mother solution of sodium sulfite and waste sulfate washing acid in scale.
Description
Technical field
A kind of treatment process of sodium sulphite waste circulating mother liquor relates to a kind of treatment process that adopts the lower concentration flue gas during smelting to produce the S-WAT waste liquor of S-WAT process.
Background technology
Purification system adopts the technical process of adiabatic evaporation, weak acid scrubbing in sulphuric acid process, and to remove the flue dust in the flue gas during smelting, in this process, having a large amount of washing diluted acids need efflux, and the spent acid of discharge can discharge after needing neutralizing treatment up to standard.
Absorb processing smelting low concentration sulphur dioxide flue gas with caustic soda and both produced seven water S-WAT products, recyclable again low concentration sulphur dioxide flue gas is administered the tight pollution of ring.This process flow process is absorption-neutralization-crystallization-separation-packing, and its isolating mother liquor returns absorption system and reuses, so that no waste discharge in the production process.The subject matter that this method exists contains small amount of N a for (1) owing in the raw material caustic soda
2SO
4, NaCl, and side reaction produces part Na in the production process
2SO
4, make mother liquor through after circulating several times, its Na
2SO
4With the continuous enrichment of NaCl, finally influence quality product; (2) work as Na
2SO
4When higher, the material viscosity increases with NaCl content, the easily stifled match of pipeline, and the centrifugation operation has some setbacks, the steady running that influence is produced.Therefore system will handle mother liquor after operation for some time.The method of handling is to absorb with mother liquor separately, forces a part of Na
2SO
4Take out of outside the system with product with NaCl, mother liquor returns use.Like this because of Na
2SO
4Limited with the product tape output with NaCl, just the respite quality influence can not be dealt with problems at all.
Summary of the invention
The objective of the invention is in order to overcome the deficiency that above-mentioned prior art exists, providing a kind of can effectively solve because of Na
2SO
4With the NaCl enrichment, finally influence quality product and pipeline takes place and easily stop up, the centrifugation operation has some setbacks, the treatment process of the sodium sulphite waste circulating mother liquor of the steady running that influence is produced.
The objective of the invention is to be achieved through the following technical solutions.
A kind of treatment process of S-WAT circulation waste liquor, it is characterized in that its treating processes is to react with adding sulfuric acid in the waste circulating mother liquor to, the sulfur dioxide gas that reaction is generated is drawn and is used for relieving haperacidity, and the metabisulfite solution that reaction generates is used to produce the sodium sulfate product.
Method of the present invention is with Na
2SO
4The circulating mother liquor that reaches certain value with NaCl content breaks away from the recycle system, effectively handles, and efficiently solves the influence of S-WAT mother liquor to quality product, has reclaimed sulfurous gas again, realizes the comprehensive utilization of sulphur resource.
Method reaction principle of the present invention is:
Na
2SO
3+H
2SO
4＝SO
2+H
2O+Na
2SO
4
Technical process is:
(1) Na in the S-WAT mother liquor
2SO
4When reaching certain value, mother liquor is carried out whole neutralizing treatment with NaCl content.
(2) calculate needs vitriolic amount according to sulfuric acid concentration in the content of S-WAT in mother liquor amount, the mother liquor and the sulfur waste acid;
(3) start the mother liquor pump mother liquor is sent into the mother liquor neutralization tank, start simultaneously and stir, open mother liquor neutralization tank acid inlet valve and add acid.
(4) according to flow-ratio control mother liquor that calculates and acid inlet electrically operated valve aperture.
(5) according to the demonstration of neutralization tank liquidometer, treat feed liquid 2/3 o'clock to mother liquor neutralization tank volume, open neutralization tank outlet motorized valve, controlling opening of valve, the liquid level of keeping neutralization tank is constant.
(6) sulfur dioxide gas is introduced the sulfuric acid flue by the gas pipeline at neutralization tank top, relies on negative pressure to enter acid making system; Neutralizer when basin is full, arrives Sodium sulfate anhydrous.min(99) sodium sulfate product systems with pump delivery by going in the basin from baric flow.
(7) automatic chain control is adopted in production control, has guaranteed stable, accurate, the operation continuously of technology.
(8) when mother liquor is all handled, stop this system.
(9) move to Na in the mother liquor when the S-WAT system
2SO
4When enrichment reaches certain value once more with NaCl content, start this system mother liquor is carried out once more, treatment process is the same.
Method of the present invention is by neutralizing with the S-WAT in sulfuric acid scrubbing spent acid and the S-WAT waste liquor, generate sulfurous gas and sodium sulfate, sulfurous gas and sodium sulfate all reclaim, and make the mother liquor in the S-WAT production process be able to part open circuit, the Na in the Controlling System
2SO
4With NaCl content within specialized range, guaranteed the continual and steady of quality product; Washing spent acid in the sulfate system is fully utilized simultaneously, has reduced the processing cost of sulfate system spent acid; Make full use of on the other hand and handle back liquid, produced the byproduct Sodium sulfate anhydrous.min(99), increased economic benefit.
With following indefiniteness examples of implementation technology of the present invention is further described, helping understanding the present invention and advantage thereof, and as the qualification to protection domain of the present invention, protection scope of the present invention is determined by claims.
Embodiment
A kind of treatment process of S-WAT circulation waste liquor, its treating processes are to react adding sulfuric acid in the waste circulating mother liquor, the sulfur dioxide gas of reaction generation are drawn be used for relieving haperacidity, and the metabisulfite solution that reaction generates is used to produce the sodium sulfate product.
Na in the S-WAT mother liquor
2SO
4Content when reaching 100g/l, mother liquor sent into to concentrate in the mother liquor tank store, fill the back and start the mother liquor treatment system and handle mother liquor.Measure the content of S-WAT in the mother liquor and wash vitriolic concentration in the sulfur waste acid, calculate needs vitriolic amount according to mother liquor amount and concentration, calculate the throughput ratio of mother liquor and spent acid, start the mother liquor pump mother liquor is sent into the mother liquor neutralization tank, start simultaneously and stir, open mother liquor neutralization tank spent acid inlet valve and add spent acid.According to flow-ratio control mother liquor that calculates and spent acid inlet electrically operated valve aperture.According to the demonstration of neutralization tank liquidometer, treat feed liquid 2/3 o'clock to mother liquor neutralization tank volume, open neutralization tank outlet motorized valve, controlling opening of valve, the liquid level of keeping neutralization tank is constant.Sulfur dioxide gas is introduced the sulfuric acid flue by the gas pipeline at neutralization tank top, relies on negative pressure to enter acid making system; Neutralizer when basin is full, to the Sodium sulfate anhydrous.min(99) system, is produced the sodium sulfate product with pump delivery by going in the basin from baric flow.When mother liquor is all handled, stop this system.Automatic chain control is adopted in production control, has guaranteed stable, accurate, the operation continuously of technology.
Embodiment 1
Add mother liquor that S-WAT content is 144.75g/l and sulfuric acid content in the mother liquor neutralization tank simultaneously and be 14.72% sulfur waste acid, the dosage of mother liquor is 110m
3, then useless vitriolic dosage is 81m
3, mother liquor and useless vitriolic throughput ratio are 1.36:1.Mother liquor inlet motorized valve aperture is 60%, and spent acid inlet motorized valve aperture is 45%.Treat feed liquid 2/3 o'clock, open and neutralization tank outlet motorized valve to mother liquor neutralization tank volume, controlling opening of valve, the liquid level of keeping neutralization tank is constant.Mix with agitator during reaction, the feed liquid full contact, the reaction times is shorter.The concentration on average about 20% of reaction back sulfur dioxide gas.The about 142g/l of sodium sulphate content in the solution, S-WAT content 70.01g/l, in and the about 170m of liquid measure
3, neutralizer is delivered to the Sodium sulfate anhydrous.min(99) system.About 6 hours of mother liquor treatment time, continuously feeding in the production, discharging continuously, process is carried out control automatically, does not need total man worker's operation.
Embodiment 2
Add mother liquor that S-WAT content is 173.96g/l and sulfuric acid content in the mother liquor neutralization tank simultaneously and be 7.51% sulfur waste acid, the dosage of mother liquor is 100m
3, then useless vitriolic dosage is 190m
3, mother liquor and useless vitriolic throughput ratio are 0.67:1.Mother liquor inlet motorized valve aperture is 60%, and spent acid inlet motorized valve aperture is 90%.Treat feed liquid 2/3 o'clock, open and neutralization tank outlet motorized valve to mother liquor neutralization tank volume, controlling opening of valve, the liquid level of keeping neutralization tank is constant.Mix with agitator during reaction, the feed liquid full contact, the reaction times is shorter.The concentration on average about 7.41% of reaction back sulfur dioxide gas.The about 93.54g/l of sodium sulphate content in the solution, in and the about 250m of liquid measure
3, neutralizer is delivered to the Sodium sulfate anhydrous.min(99) system.About 5 hours of mother liquor treatment time, continuously feeding in the production, discharging continuously, process is carried out control automatically, does not need total man worker's operation.
Claims (1)
1. the treatment process of a S-WAT circulation waste liquor, it is characterized in that its treating processes is to react with adding sulfuric acid in the waste circulating mother liquor to, the sulfur dioxide gas that reaction is generated is drawn and is used for relieving haperacidity, and the metabisulfite solution that reaction generates is used to produce the sodium sulfate product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100776670A CN101481166A (en) | 2009-02-11 | 2009-02-11 | Method for processing sodium sulphite waste circulating mother liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100776670A CN101481166A (en) | 2009-02-11 | 2009-02-11 | Method for processing sodium sulphite waste circulating mother liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101481166A true CN101481166A (en) | 2009-07-15 |
Family
ID=40878485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100776670A Pending CN101481166A (en) | 2009-02-11 | 2009-02-11 | Method for processing sodium sulphite waste circulating mother liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101481166A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320617A (en) * | 2011-06-27 | 2012-01-18 | 湖南合磷化工有限公司 | Method for producing sodium fluosilicate by sodium sulfite circulating mother liquor |
| CN107285344A (en) * | 2017-07-26 | 2017-10-24 | 沈阳化工研究院有限公司 | The handling process and device of accessory substance mixing abraum salt in a kind of phenol manufacturing process |
| CN112939028A (en) * | 2020-11-03 | 2021-06-11 | 宣城市楷昂化工有限公司 | Preparation method of sodium sulfite |
-
2009
- 2009-02-11 CN CNA2009100776670A patent/CN101481166A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320617A (en) * | 2011-06-27 | 2012-01-18 | 湖南合磷化工有限公司 | Method for producing sodium fluosilicate by sodium sulfite circulating mother liquor |
| CN107285344A (en) * | 2017-07-26 | 2017-10-24 | 沈阳化工研究院有限公司 | The handling process and device of accessory substance mixing abraum salt in a kind of phenol manufacturing process |
| CN107285344B (en) * | 2017-07-26 | 2023-07-21 | 沈阳化工研究院有限公司 | Treatment process and device for byproduct mixed waste salt in phenol production process |
| CN112939028A (en) * | 2020-11-03 | 2021-06-11 | 宣城市楷昂化工有限公司 | Preparation method of sodium sulfite |
| CN112939028B (en) * | 2020-11-03 | 2023-05-26 | 宣城市楷昂化工有限公司 | Preparation method of sodium sulfite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104743727B (en) | A kind of desulfurization wastewater cooperates with the System and method for of demercuration | |
| DK153056B (en) | PROCEDURE FOR ABSORPTION OF SULFUR OXIDES FROM SEA GAS | |
| CN107162281A (en) | The processing method and Waste Water Treatment of heavy metal ion in a kind of removal smelting wastewater | |
| CN104001412A (en) | Smoke desulfurizing agent and smoke desulfurizing method | |
| CN201147664Y (en) | Whole set processing equipment for hydrogenchloride and sulfuric dioxide tail gas | |
| CN101481166A (en) | Method for processing sodium sulphite waste circulating mother liquor | |
| CN114984735A (en) | Treatment method for chlorine absorption by sodium hydroxide solution | |
| CN209501361U (en) | Novel energy-conserving Complexing Iron desulphurization plant | |
| CN105347592A (en) | Recycling zero-emission treatment process for desulfurization wastewater | |
| CN110917850A (en) | Method for cleaning calcium sulfate scale of double-alkali desulfurization tower | |
| CN201419077Y (en) | Separation-type sodium-calcium double alkali method smoke gas desulfurizing device | |
| CN102515112A (en) | Method for preparing sodium sulfide from hydrogen sulfide waste gas produced in production of viscose fibre | |
| CN102701170B (en) | Process method for removing arsenic from feed-grade calcium hydrogen phosphate prepared from wet-process phosphoric acid | |
| CN112481646A (en) | Chlorate device is removed to potassium chloride salt water | |
| CN102452674B (en) | Processing method for recycling sodium sulfate from waste alkali liquor in ethylene unit | |
| CN104671221A (en) | Method and device for preparing sulphuric acid by taking discharged sulfur dioxide as raw material | |
| CN101683588A (en) | Process for removing SO2 from zinc-smelting flue gas | |
| CN211612176U (en) | Hydrogen chloride tail gas absorbing device of by-product high concentration hydrochloric acid | |
| CN102320697A (en) | Desulfuration process for chromate waste water | |
| CN107051155B (en) | Method for preparing nitrate by using low-grade alkali-containing brine for flue gas desulfurization-oxidation | |
| CN111137964A (en) | Coal-fired boiler ammonia desulfurization slurry dechlorination treatment process | |
| CN112250131A (en) | Ammonia nitrogen wastewater treatment method | |
| CN102452673B (en) | Recovery processing method of waste alkaline liquor in ethylene plant | |
| CN104667732B (en) | A kind of method utilizing phosphoric acid by wet process to absorb sulfur dioxide in sulfuric acid tail gas | |
| RU2316473C1 (en) | Method for separating anhydrous sodium sulfate from return solutions of gas scrubbing of aluminum cells |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090715 |