CN110917850A - Method for cleaning calcium sulfate scale of double-alkali desulfurization tower - Google Patents
Method for cleaning calcium sulfate scale of double-alkali desulfurization tower Download PDFInfo
- Publication number
- CN110917850A CN110917850A CN201911103963.3A CN201911103963A CN110917850A CN 110917850 A CN110917850 A CN 110917850A CN 201911103963 A CN201911103963 A CN 201911103963A CN 110917850 A CN110917850 A CN 110917850A
- Authority
- CN
- China
- Prior art keywords
- desulfurization
- solution
- alkali
- circulating
- calcium sulfate
- 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
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 title claims abstract description 55
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 51
- 230000023556 desulfurization Effects 0.000 title claims abstract description 51
- 239000003513 alkali Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004140 cleaning Methods 0.000 title claims abstract description 14
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 37
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 33
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 16
- 230000003009 desulfurizing effect Effects 0.000 claims description 16
- 230000008929 regeneration Effects 0.000 claims description 15
- 238000011069 regeneration method Methods 0.000 claims description 15
- 229910052925 anhydrite Inorganic materials 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 11
- 229910001424 calcium ion Inorganic materials 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- 235000017550 sodium carbonate Nutrition 0.000 claims description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 239000000706 filtrate Substances 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 229910052602 gypsum Inorganic materials 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000003916 acid precipitation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 150000007530 organic bases Chemical class 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical group [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a method for cleaning calcium sulfate scale of a double-alkali desulfurization tower, which adopts sodium carbonate as a scale remover, and the sodium carbonate is prepared into a 30% solution. And (4) feeding the mixture into an alkali pool of a double-alkali desulfurization tower. The invention comprises the following contents: (1) the concentration of the soda solution is 30 percent; (2) controlling the pH value of a desulfurization solution in a circulating pool of the dual-alkali desulfurization tower to be 5-7; (3) the sodium carbonate is both a desulfurizer and a scale remover; (4) the calcium sulfate is converted into calcium carbonate by the sodium carbonate, the calcium carbonate is discharged out of the tower along with the circulating liquid, and the descaling time for achieving the descaling purpose (5) depends on the amount of the calcium sulfate. The process realizes the removal of calcium sulfate scale by the double-alkali desulfurization tower, and has simple process and low cost.
Description
Technical Field
The invention belongs to the field of nonferrous metal metallurgy desulfurization, and particularly relates to a method for cleaning calcium sulfate scale of a double-alkali desulfurization tower.
Background
SO of our country in recent years2The annual emission amount is about 2000 million tons and is the first emission in the world. SO (SO)2The discharge of the acid rain causes the acid rain to appear in nearly one third of the soil area of China, and becomes three acid rain in the worldOne of the areas causes the loss of China to be more than billion yuan each year. The key point is from the industries of coal-fired boilers, smelting, sintering and the like.
Currently, Flue Gas Desulfurization (FGD) is the only desulfurization technique used commercially on a large scale in the world. The flue gas that thermal power plant discharged has two characteristics: first, SO in flue gas2The concentration is very low, generally between 300-5000ppmv (1000-15000mg/Nm 3); secondly, the smoke amount is huge. For example, the amount of flue gas generated by a 300MW unit is 120 × 104Nm 3/h. There are more than about 200 methods devoted to flue gas desulfurization research in countries around the world, but only 10 methods are industrially applied, including: with CaO/CaCO3The calcium-based method; MgO-based magnesium method; with Na2CO3The sodium-based method; an ammonia process based on NH 3; organic base processes based on organic bases. The above methods have advantages and disadvantages, but all consume resources, such as limestone, MgO, Na2CO3And the like.
Sodium-calcium double alkali method for absorbing SO by using liquid alkali2And lime is reduced and regenerated, and the regenerated alkali liquor is recycled. The desulfurization solution adopts an external circulation absorption mode. Absorb SO2The desulfurization solution flows into a regeneration tank to carry out regeneration reaction with new slaked lime, the slurry after the reaction enters a filter press to carry out effective filter pressing, the waste residue is transported outwards to be treated, and the filtrate enters an alkali tank. The regenerated alkali liquor in the alkali pool is pumped into the circulating pool by a circulating pump, and the alkali liquor in the circulating pool is pumped into the desulfurizing tower by the circulating pump for recycling. During operation, a large amount of calcium ions are brought during regeneration, calcium ions and sulfate ions form calcium sulfate, the nozzle is blocked by the calcium sulfate, the wall of the tower and a pipeline are scaled, the traditional method for reducing the pH value to remove the calcium sulfate is not suitable for a desulfurizing tower, the calcium sulfate is generally removed by a mechanical method, and the mechanical method can damage the implementation and influence the production.
Disclosure of Invention
The invention provides a method for cleaning calcium sulfate scale of a double-alkali desulfurization tower, which can stably and efficiently remove the scale; the consumption of resources is low, and the production cost is low.
The technical scheme of the invention is that the method for cleaning calcium sulfate scale of the double-alkali desulfurization tower comprises the following steps:
(1) preparing 30% solution of soda by weight;
(2) putting the soda solution into an alkali pool in a desulfurization system; decalcifying soda ash in an alkaline pond to enable calcium ions in the solution and carbonate ions to form calcium carbonate precipitates; filter pressing, wherein the filtrate is a desulfurization solution, and calcium carbonate filter residues are removed;
(3) and (3) desulfurization: in the desulfurizing tower, SO in the flue gas2When the molecules contact with water, the molecules are dissolved in the water and hydrated with the water molecules to form sulfurous acid, and the sulfurous acid and an alkaline desulfurizing agent Na dissolved in the water2CO3Acting to produce NaHSO3A solution; meanwhile, in the desulfurizing tower, an alkaline desulfurizing agent Na is used2CO3And also with the scale CaSO4Reacting to realize descaling;
controlling the pH value of the circulating desulfurization solution in the circulating pool to be less than 7; when the pH value of the desulfurization solution is less than 5, discharging the desulfurization solution to a regeneration tank;
(4) leading the desulfurization solution into a circulating tank, supplementing alkali liquor in the circulating tank, and enabling the pH value of the circulating desulfurization solution in the circulating tank to reach 7;
(5) in a regeneration tank, reacting the desulfurized liquid with calcium hydroxide to generate sodium hydroxide and calcium sulfate, and controlling the pH value of the regeneration tank to be 9-10 to generate an alkaline regeneration liquid; filter pressing, and removing gypsum filter residue; the regenerated liquid contains calcium ions and is returned to the alkali pool for decalcification.
In the step (2), the soda ash in the soda pool is decalcified, and the concentration of calcium ions in the decalcified liquid is less than 0.1 g/L.
In the step (3), the reaction for removing the scale in the tower is Na2CO3＋CaSO4＝CaCO3＋NaSO4The reaction principle is CaCO3Solubility at 20 ℃ of 0.0013g/100ml, CaSO4Solubility at 20 ℃ of 0.24g/100ml, CaCO3Has a solubility less than CaSO4The solubility of (a).
In the step (3), the pH value of the circulating desulfurization solution in the circulating pool is controlled to be 5-7; in favor of Na under weak acid condition2CO3＋CaSO4＝CaCO3＋NaSO4The reaction is carried out, and the desulfurization efficiency is high; when circulating desulfurization solutionpH value of<When 5 is used, the desulfurization efficiency is drastically lowered, so that the pH of the desulfurization solution is controlled to be higher than 5, and CaCO is produced3And the desulfurizing liquid is discharged out of the tower along with the desulfurizing liquid.
In the step (5), the pH value of the regeneration pool is controlled to be 9-10, the pH value is too high, and the regeneration liquid contains a large amount of calcium ions.
The invention adopts the soda ash solution to replace liquid caustic soda as a desulfurizer to carry out desulfurization, calcium sulfate is converted into calcium carbonate to achieve descaling, and the descaling time depends on the amount of the calcium sulfate. The soda ash is not only a desulfurizer but also a scale remover, and the cleaning of calcium sulfate scale of the desulfurizing tower by the double-alkali desulfurization method is realized. The method has the advantages of simple flow, low soda ash price, small corrosion, safety and low production cost.
FIG. 1 is a schematic diagram of the process for cleaning calcium sulfate scale in a double-alkali desulfurization tower according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Referring to fig. 1, the process for cleaning calcium sulfate scale in a double-alkali desulfurization tower of the invention comprises the following steps: SO in flue gas in the first step2When the molecule contacts with water, it is dissolved in water and hydrated with water molecule to obtain sulfurous acid and SO2+H2O—H2SO3；
Second step H2SO3With alkaline desulfurizing agent Na dissolved in water2CO3Action, reaction equation:
①Na2CO3＋SO2＝Na2SO3＋CO2；
②Na2SO3＋SO2＋H2O＝2NaHSO3the pH value of the solution is lower (5 to 9)
The third step of decalcification comprises the following two parts:
① reaction for removing scale in tower is Na2CO3＋CaSO4＝CaCO3＋NaSO4The reaction principle is CaCO3Has a solubility of 0.0013g/100ml at 20 ℃ and CaSO4Has a solubility of 0.24g/100ml at 20 ℃ of CaCO3Solubility of (2)Less than CaSO4Solubility;
② decalcifying reaction in alkali pond, wherein calcium ion in the solution and carbonate ion form calcium carbonate precipitate.
The above-described embodiments are merely illustrative of the present invention, and those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A method for cleaning calcium sulfate scale of a double-alkali desulfurization tower is characterized by comprising the following steps:
(1) preparing 30% solution of soda by weight;
(2) putting the soda solution into an alkali pool in a desulfurization system; decalcifying soda ash in an alkaline pond to enable calcium ions in the solution and carbonate ions to form calcium carbonate precipitates; filter pressing, wherein the filtrate is a desulfurization solution, and calcium carbonate filter residues are removed;
(3) and (3) desulfurization: in the desulfurizing tower, SO in the flue gas2When the molecules contact with water, the molecules are dissolved in the water and hydrated with the water molecules to form sulfurous acid, and the sulfurous acid and an alkaline desulfurizing agent Na dissolved in the water2CO3Acting to produce NaHSO3A solution; meanwhile, in the desulfurizing tower, an alkaline desulfurizing agent Na is used2CO3And also with the scale CaSO4Reacting to realize descaling;
controlling the pH value of the circulating desulfurization solution in the circulating pool to be less than 7; when the batch pH value of the desulfurization solution is less than 5, discharging the desulfurization solution to a regeneration tank;
(4) leading the desulfurization solution into a circulating tank, supplementing alkali liquor in the circulating tank, and enabling the pH value of the circulating desulfurization solution in the circulating tank to reach 7;
(5) in a regeneration tank, reacting the desulfurized liquid with calcium hydroxide to generate sodium hydroxide and calcium sulfate, and controlling the pH value of the regeneration tank to be 9-10 to generate an alkaline regeneration liquid; filter pressing, and removing gypsum filter residue; the regenerated liquid contains calcium ions and is returned to the alkali pool for decalcification.
2. The method for cleaning calcium sulfate scale in the double-alkali desulfurization tower according to claim 1, characterized in that: in the step (2), the soda ash in the soda pool is decalcified, and the concentration of calcium ions in the decalcified liquid is less than 0.1 g/L.
3. The method for cleaning calcium sulfate scale in the double-alkali desulfurization tower according to claim 1, characterized in that: in the step (3), the reaction for removing the scale in the tower is Na2CO3＋CaSO4＝CaCO3＋NaSO4The reaction principle is CaCO3Solubility at 20 ℃ of 0.0013g/100ml, CaSO4Solubility at 20 ℃ of 0.24g/100ml, CaCO3Has a solubility less than CaSO4The solubility of (a).
4. The method for cleaning calcium sulfate scale in the double-alkali desulfurization tower according to claim 1, characterized in that: in the step (3), the pH value of the circulating desulfurization solution in the circulating pool is controlled to be 5-7; in favor of Na under weak acid condition2CO3＋CaSO4＝CaCO3＋NaSO4The reaction is carried out, and the desulfurization efficiency is high; when the pH value of the circulating desulfurization solution<When 5 is used, the desulfurization efficiency is drastically lowered, so that the pH of the desulfurization solution is controlled to be higher than 5, and CaCO is produced3And the desulfurizing liquid is discharged out of the tower along with the desulfurizing liquid.
5. The method for cleaning calcium sulfate scale in the double-alkali desulfurization tower according to claim 1, characterized in that: in the step (5), the pH value of the regeneration tank is controlled to be 9-10, the pH value is too high, and the regeneration liquid contains a large amount of calcium ions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911103963.3A CN110917850A (en) | 2019-11-13 | 2019-11-13 | Method for cleaning calcium sulfate scale of double-alkali desulfurization tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911103963.3A CN110917850A (en) | 2019-11-13 | 2019-11-13 | Method for cleaning calcium sulfate scale of double-alkali desulfurization tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110917850A true CN110917850A (en) | 2020-03-27 |
Family
ID=69852720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911103963.3A Pending CN110917850A (en) | 2019-11-13 | 2019-11-13 | Method for cleaning calcium sulfate scale of double-alkali desulfurization tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110917850A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701436A (en) * | 2020-06-23 | 2020-09-25 | 湖北真诚纸业有限公司 | Novel dual-alkali desulfurization method |
| CN111777090A (en) * | 2020-07-16 | 2020-10-16 | 江西理工大学 | A kind of dissolving method of calcium sulfate |
| CN114772626A (en) * | 2022-06-02 | 2022-07-22 | 武汉华德环保工程技术有限公司 | Method for co-producing sodium sulfate and calcium carbonate from sodium bicarbonate desulfurized fly ash |
| CN116144407A (en) * | 2022-12-28 | 2023-05-23 | 天津铁厂有限公司 | A method of using sodium hydroxide to reduce the resistance of coke oven gas desulfurization tower |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410500A (en) * | 1982-05-10 | 1983-10-18 | Fmc Corporation | Sodium-limestone double alkali flue gas desulfurization method |
| CN102357337A (en) * | 2011-10-17 | 2012-02-22 | 湖北双环科技股份有限公司 | Desulphurization technology through sodium-calcium dual-alkali method |
| CN206262350U (en) * | 2016-12-09 | 2017-06-20 | 清源天蓝（北京）环保科技有限公司 | Smoke-gas wet desulfurization equipment based on sodium carbonate |
-
2019
- 2019-11-13 CN CN201911103963.3A patent/CN110917850A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4410500A (en) * | 1982-05-10 | 1983-10-18 | Fmc Corporation | Sodium-limestone double alkali flue gas desulfurization method |
| CN102357337A (en) * | 2011-10-17 | 2012-02-22 | 湖北双环科技股份有限公司 | Desulphurization technology through sodium-calcium dual-alkali method |
| CN206262350U (en) * | 2016-12-09 | 2017-06-20 | 清源天蓝（北京）环保科技有限公司 | Smoke-gas wet desulfurization equipment based on sodium carbonate |
Non-Patent Citations (2)
| Title |
|---|
| 吴忠标: "《实用环境工程手册 大气污染控制工程》", 30 September 2001, 化学工业出版社 * |
| 赵由才: "《湿法冶金污染控制技术》", 31 March 2003, 冶金工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701436A (en) * | 2020-06-23 | 2020-09-25 | 湖北真诚纸业有限公司 | Novel dual-alkali desulfurization method |
| CN111777090A (en) * | 2020-07-16 | 2020-10-16 | 江西理工大学 | A kind of dissolving method of calcium sulfate |
| CN114772626A (en) * | 2022-06-02 | 2022-07-22 | 武汉华德环保工程技术有限公司 | Method for co-producing sodium sulfate and calcium carbonate from sodium bicarbonate desulfurized fly ash |
| CN116144407A (en) * | 2022-12-28 | 2023-05-23 | 天津铁厂有限公司 | A method of using sodium hydroxide to reduce the resistance of coke oven gas desulfurization tower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110917850A (en) | Method for cleaning calcium sulfate scale of double-alkali desulfurization tower | |
| CN107619137B (en) | Method for recycling calcium and magnesium in desulfurization wastewater by carbonization method | |
| CN100443412C (en) | Method for treating tail gas and waste water from rare earth finished ore acid method burning process | |
| CN100488601C (en) | Flue gas desulfurization method by using magnesium compound and ammonia for circulated regeneration | |
| CN105457477A (en) | Sodium-calcium dual-alkali flue gas desulfurization method and system | |
| CN105903333B (en) | A kind of flue gas process for deep desulphurization of magnesium fortified red mud | |
| CN100469419C (en) | Segmented sodium-calcium double-alkali desulfurization process and its device | |
| CN111924807A (en) | Method and device for trapping carbon dioxide and simultaneously producing sulfuric acid by sodium bisulfate | |
| CN114950116B (en) | Method and system for regenerating circulating ammonia by-product active calcium by ammonia calcium desulfurization | |
| CN106512678A (en) | Flue gas desulfurization and decarbonization device and flue gas desulfurization and decarbonization method | |
| CN101347706A (en) | Flue gas desulfurization technique using dual alkali method with acetylene sludge as recycling agent | |
| CN102225307A (en) | Organic acid enhanced calcium carbide slag flue gas desulfurization technology | |
| CN102284238A (en) | Bialkali-method flue-gas desulphurization process | |
| CN100482596C (en) | Method of recovering and regenerating waste gas desulfurizing and defluorinating absorbent liquid continuously | |
| CN113996171B (en) | Industrial flue gas desulfurization, denitrification and decarbonization system and treatment method | |
| CN204543981U (en) | Removing sulfur dioxide in flue gas also produces the magnesium-calcium base wet-process desulphurization system of gypsum | |
| CN118874176A (en) | A flue gas purification and high-nitrate and low-calcium brine purification system | |
| CN1339332A (en) | Sulphur dioxide removing electrolysis process | |
| CN115745266B (en) | System and method for capturing carbon dioxide in smelter flue gas to treat high-calcium and high-salt wastewater | |
| CN111135603A (en) | A kind of waste alkali treatment method | |
| CN216778469U (en) | Industrial flue gas desulfurization, denitrification and decarbonization system | |
| CN103611401A (en) | Brine purification waste-residue desulfurization process | |
| CN211487169U (en) | Sodium-alkali method desulphurization device | |
| CN102225306A (en) | Steel slag-sodium alkali double alkali method wet flue gas desulfurization technology | |
| CN108031052A (en) | A kind of barite thermal reduction-water logging barium residue detoxifying process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200327 |
|
| WD01 | Invention patent application deemed withdrawn after publication |