CN106943859A - One kind administers S0 in flue gas2The method for producing anhydrous sodium sulfite - Google Patents
One kind administers S0 in flue gas2The method for producing anhydrous sodium sulfite Download PDFInfo
- Publication number
- CN106943859A CN106943859A CN201610006129.2A CN201610006129A CN106943859A CN 106943859 A CN106943859 A CN 106943859A CN 201610006129 A CN201610006129 A CN 201610006129A CN 106943859 A CN106943859 A CN 106943859A
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- CN
- China
- Prior art keywords
- sodium sulfite
- flue gas
- solution
- anhydrous sodium
- producing anhydrous
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
- B01D2259/124—Liquid reactants
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
One kind administers SO in flue gas2The method for producing anhydrous sodium sulfite, is related to environmental protection and is converted into the field of product.First flue gas washing is purified, then the SO in flue gas is absorbed with sodium sulfite solution2, solution of sodium bisulfite is generated, solid sodium carbonate is added and neutralizes, generation sodium sulfite crystallization is packed through separation, heat drying, as anhydrous sodium sulfite product.Mother liquor is that sodium sulfite solution return is absorbed.The present invention can not only absorb the SO in flue gas2, discharge gas is met environmental requirement, and be not required to evaporization process, moreover it is possible to which absorbent is converted into value-added useful products.
Description
Technical field
The present invention relates to environmental technology field, and it is converted into product.
Background technology
Contain SO in general flue gas2, when concentration is not high, typically only 0.014%~3.5%, it is impossible to directly produce sulfuric acid, and be vented pollution environment, waste of resource.Administer SO in flue gas2Method have many, respectively have advantage and disadvantage：Some investments are too big, and some operating costs are too high, and what is had can not utilize SO2Make product.
The content of the invention
Present invention aims at the SO administered in flue gas2, and produce anhydrous sodium sulfite.
The present invention comprises the following steps：
1) flue gas is subjected to washing, purifying with solution of sodium bisulfite, washes away dust-laden in flue gas, SO3And impurity, to improve the product quality of anhydrous sodium sulfite.Cleaning solution is recycled, part settlement treatment.
2) SO in flue gas is absorbed with sodium sulfite solution2, generate solution of sodium bisulfite.As SO in flue gas2When concentration is higher, it need to be absorbed using two-stage or multi-stage countercurrent, SO in the concentration gradient and flue gas to form absorbing liquid2Concentration gradient, improve absorptivity, it is ensured that reach discharge gas in SO2Concentration requirement.
3) add solid sodium carbonate in solution of sodium bisulfite to neutralize, generation sodium sulfite crystallization is packed, as anhydrous sodium sulfite product through separation, heat drying.The key of neutralization is to control the pH value of neutralizer：When pH value is too high, sodium carbonate (or NaOH) is contained in product；Then increase when pH value is too low and contain sodium hydrogensulfite in internal circulating load, and product.
4) mother liquor after separating is sodium sulfite solution, and the SO absorbed in flue gas is back to again2。
Brief description of the drawings
Fig. 1 is washing, purifying figure；
Fig. 2 is to absorb SO2Figure；
Fig. 3 is to neutralize crystallization figure.
Embodiment：
First, step：
1st, washing, purifying：A small amount of solution of sodium bisulfite is sent from absorption tower into scrubbing tower, dust-laden in flue gas, SO is washed away3And impurity, without absorbing SO2。
Wash SO3Reaction equation be：
SO3+2NaHSO3→Na2SO4+2SO2+H2O
Circulate the cleaning solution of washing, need impurity press filtration (including sulfate crystal) therein periodically, and supplement solution of sodium bisulfite (see accompanying drawing 1).
2nd, SO is absorbed2：In absorption tower the SO in flue gas is absorbed with sodium sulfite solution2, generate solution of sodium bisulfite.As SO in flue gas2When concentration is higher, it need to be absorbed using multi-stage countercurrent (see accompanying drawing 2).
Reaction equation is：
Na2SO3+SO2+H2O→2NaHSO3
3rd, crystallization is neutralized：Add solid sodium carbonate in the solution of sodium bisulfite in neutralizing crystallization tank to neutralize, generation sodium sulfite crystallization is (see accompanying drawing 3).
Reaction equation is：
2NaHSO3+Na2CO3→2Na2SO3+CO2+H2O
Sodium sulfite crystallization is packed through separation, heat drying, as anhydrous sodium sulfite product.
4th, mother liquor reuse：Mother liquor after separation is sodium sulfite solution, and the SO absorbed in flue gas is back to again2。
2nd, feature of the present invention：
1st, the present invention relates to environmental technology field, by the oxious component SO of the influence air in flue gas2Become useful anhydrous sodium sulfite product.And it is SO in many improvement flue gases2Method in, the simplest one kind of flow sheet equipment, small investment, the lowest coursing cost.
2nd, sodium sulfite is produced in the past, it is desirable to the SO in gas2Concentration is higher, typically requires in 100000mg/m3More than.Present invention only require that the SO in flue gas (or Sulphuric acid tail gas)2Concentration is for 400mg/m3More than.
3rd, the method for production anhydrous sodium sulfite product of the invention, is to add solid sodium carbonate in solution of sodium bisulfite to neutralize, crystallize, is not required to evaporization process, the balance with regard to that can keep water.So as to simple flow, equipment is reduced, investment is reduced, the thermal source of evaporation is not required to, energy consumption is saved.
Claims (5)
1. one kind administers SO in flue gas2The method for producing anhydrous sodium sulfite, it is characterised in that comprise the following steps：
1) flue gas is subjected to washing, purifying with solution of sodium bisulfite, to improve the product matter of anhydrous sodium sulfite
Amount.
2) SO in flue gas is absorbed with sodium sulfite solution2, generate solution of sodium bisulfite.
3) add solid sodium carbonate in solution of sodium bisulfite to neutralize, generation sodium sulfite crystallization, through centrifugation
Separation, as heat drying packaging, anhydrous sodium sulfite product.
4) mother liquor after centrifuging is that sodium sulfite solution is back to the SO absorbed in flue gas again2。
2. SO in flue gas is administered according to claim 12The method for producing anhydrous sodium sulfite, it is characterised in that
SO in the flue gas2Concentration is 400~100000mg/m3, drop a hint middle SO after improvement2Concentration is
50~200mg/m3。
3. SO in flue gas is administered according to claim 12The method for producing anhydrous sodium sulfite, it is characterised in that
The pH value of the solution of sodium bisulfite for sending to neutralization is 3.5~5.5.Added in solution of sodium bisulfite
Neutralizer pH value after solid sodium carbonate (or finally adding a small amount of caustic soda regulation pH value) is 5.5~8.0.
4. SO in flue gas is administered according to claim 12The method for producing anhydrous sodium sulfite, it is characterised in that
The neutralizer added in solution of sodium bisulfite after sodium carbonate is not required to evaporization process, you can crystallizes, divide
From.
5. SO in flue gas is administered according to claim 12The method for producing anhydrous sodium sulfite, it is characterised in that
The Crystallization Separation temperature of the anhydrous sodium sulfite is 40~70 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610006129.2A CN106943859A (en) | 2016-01-07 | 2016-01-07 | One kind administers S0 in flue gas2The method for producing anhydrous sodium sulfite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610006129.2A CN106943859A (en) | 2016-01-07 | 2016-01-07 | One kind administers S0 in flue gas2The method for producing anhydrous sodium sulfite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106943859A true CN106943859A (en) | 2017-07-14 |
Family
ID=59466140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610006129.2A Pending CN106943859A (en) | 2016-01-07 | 2016-01-07 | One kind administers S0 in flue gas2The method for producing anhydrous sodium sulfite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106943859A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108837687A (en) * | 2018-08-17 | 2018-11-20 | 深圳市凯盛科技工程有限公司 | A kind of flat glass industry melting furnaces flue gas desulphurization system |
| CN109455742A (en) * | 2019-01-06 | 2019-03-12 | 曲阜师范大学 | A kind of method of simple production pharmaceutic adjuvant anhydrous sodium sulfite |
| CN110255585A (en) * | 2019-07-10 | 2019-09-20 | 南京工业大学 | A kind of device and method preparing sulphite |
| CN112573541A (en) * | 2020-10-16 | 2021-03-30 | 黄石加柯环保科技有限公司 | Preparation method and system of anhydrous sodium sulfite |
-
2016
- 2016-01-07 CN CN201610006129.2A patent/CN106943859A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108837687A (en) * | 2018-08-17 | 2018-11-20 | 深圳市凯盛科技工程有限公司 | A kind of flat glass industry melting furnaces flue gas desulphurization system |
| CN109455742A (en) * | 2019-01-06 | 2019-03-12 | 曲阜师范大学 | A kind of method of simple production pharmaceutic adjuvant anhydrous sodium sulfite |
| CN109455742B (en) * | 2019-01-06 | 2021-01-12 | 曲阜师范大学 | Method for simply producing pharmaceutic adjuvant anhydrous sodium sulfite |
| CN110255585A (en) * | 2019-07-10 | 2019-09-20 | 南京工业大学 | A kind of device and method preparing sulphite |
| CN110255585B (en) * | 2019-07-10 | 2020-08-18 | 南京工业大学 | Device and method for preparing sulfite |
| CN112573541A (en) * | 2020-10-16 | 2021-03-30 | 黄石加柯环保科技有限公司 | Preparation method and system of anhydrous sodium sulfite |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170714 |
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| WD01 | Invention patent application deemed withdrawn after publication |