CN114573005A - Potassium-sodium salt recycling process for sintering machine head ash and garbage fly ash - Google Patents
Potassium-sodium salt recycling process for sintering machine head ash and garbage fly ash Download PDFInfo
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- CN114573005A CN114573005A CN202210235560.XA CN202210235560A CN114573005A CN 114573005 A CN114573005 A CN 114573005A CN 202210235560 A CN202210235560 A CN 202210235560A CN 114573005 A CN114573005 A CN 114573005A
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- China
- Prior art keywords
- ash
- machine head
- potassium
- salt
- fly ash
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- 239000002956 ash Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000010881 fly ash Substances 0.000 title claims abstract description 23
- 238000005245 sintering Methods 0.000 title claims abstract description 19
- 238000004064 recycling Methods 0.000 title claims abstract description 16
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 title description 6
- 238000005406 washing Methods 0.000 claims abstract description 26
- 150000003839 salts Chemical class 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002699 waste material Substances 0.000 claims abstract description 10
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 9
- 239000011591 potassium Substances 0.000 claims abstract description 9
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000004062 sedimentation Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 22
- 239000011780 sodium chloride Substances 0.000 abstract description 11
- 238000002425 crystallisation Methods 0.000 abstract description 9
- 230000008025 crystallization Effects 0.000 abstract description 9
- 239000006227 byproduct Substances 0.000 abstract description 4
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 abstract 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 22
- 235000011164 potassium chloride Nutrition 0.000 description 11
- 239000001103 potassium chloride Substances 0.000 description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011278 co-treatment Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- BUKHSQBUKZIMLB-UHFFFAOYSA-L potassium;sodium;dichloride Chemical group [Na+].[Cl-].[Cl-].[K+] BUKHSQBUKZIMLB-UHFFFAOYSA-L 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/08—Preparation by working up natural or industrial salt mixtures or siliceous minerals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a recycling process of potassium and sodium salt in sintering machine head ash and garbage fly ash, which comprises the following steps of (1) washing a cache bin by adopting a simple warehouse and a grab bucket, and realizing the whole process of loading, unloading and primary dissolving ash supply of the machine head ash under a closed working condition; (2) the water washing adopts a three-stage countercurrent water washing process; (3) solid-liquid separation for deashing, plate-and-frame filter pressing or a horizontal spiral sedimentation centrifuge is selected; (4) heavy metals in the waste fly ash water are jointly mixed by filter pressing of qualified wet ash and are solidified in cement lattices in the process of cooperative treatment. According to the recycling process of the potassium and sodium salt in the sintering machine head ash and the garbage fly ash, provided by the invention, the potassium salt and the sodium chloride which are high in purity can be obtained as by-products through the crystallization salt separation route, so that the potassium salt and the sodium salt in the garbage fly ash are recycled.
Description
Technical Field
The invention belongs to the technical field of salt separation industry, and particularly relates to a potassium-sodium salt separation recycling process for sintering machine head ash and garbage fly ash.
Background
And after the salt content and the chloride ion content of the sintering machine head ash are removed by washing, recovering lead concentrate, iron-rich materials and the like in the machine head ash to realize the recycling of the machine head ash.
After the waste fly ash is desalted by washing, the content of chloride ions is lower than the requirement, the waste fly ash enters a cement kiln, and wet ash desalted by washing is mixed into cement production raw materials in proportion, so that the resource utilization of waste incineration fly ash is realized, and the cost of cement production raw materials can be saved.
The main salt contained in the washing water of the washing machine head ash produced water is potassium chloride-sodium chloride, and at present, most processes adopt an evaporation or cooling mode to separate out potassium chloride, and then mother liquor is refluxed and discharged outside, so that chloride ions in a washing system are continuously enriched. And sodium chloride is not recycled, and the complete recycling of inorganic salt in the machine head ash of the water washing machine is not completely realized.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention aims to: provides a process for recycling potassium and sodium salt in sintering machine head ash and garbage fly ash.
A process for recycling potassium and sodium salt in sintering machine head ash and garbage fly ash, which comprises the following steps,
(1) the cache storage bin adopts a simple warehouse to be matched with a grab bucket for water washing, so that the full flow of loading, unloading and initial dissolving ash supply of machine head ash under a closed working condition is realized;
(2) the water washing adopts a three-stage countercurrent water washing process;
(3) solid-liquid separation for deashing, plate-and-frame filter pressing or a horizontal spiral sedimentation centrifuge is selected;
(4) heavy metals in the waste fly ash water are jointly mixed by filter pressing of qualified wet ash and are solidified in cement lattices in the process of cooperative treatment.
Preferably, in the step (1), the cache bin adopts a negative pressure feeding ash storage bin.
Preferably, in the step (2), the washing ratio is controlled to be 3: 1-1: 1.
Preferably, the method further comprises a step (5) after the step (4), the water-salt system phase equilibrium data is obtained according to the salt separation system, and the water-salt system phase equilibrium data is edited into excel to be converted into a corresponding fitting function; and editing the obtained fitting functional relationship into excel to obtain the salt control data.
Compared with the prior art, the invention has the following beneficial effects:
1. a set of complete full-flow process of washing, pretreatment and salt separation crystallization realizes the complete separation of sodium chloride and potassium chloride. Washing the sintering machine head ash to obtain an undersaturated salt slurry solution, and performing pretreatment such as softening, weight removal, decoloring and the like to enter a mass-separation crystallization system to realize the separation of sodium chloride and potassium chloride.
2. Through the crystallization and salt separation route, by-products of potassium chloride and sodium chloride with high purity can be obtained, and the recycling of potassium sodium salt in the waste fly ash is realized.
Detailed Description
The present invention will be described in detail with reference to examples.
Examples
A process for reclaiming the salt from potassium and sodium in the first ash and fly ash of sinter machine features that the sodium chloride and potassium chloride are completely separated. Washing the sintering machine head ash to obtain an undersaturated salt slurry solution, and then performing pretreatment such as softening, weight removal, decoloring and the like on the undersaturated salt slurry solution to enter a quality-divided crystallization system to realize the separation of sodium chloride and potassium chloride.
The buffer storage bin can adopt a simple warehouse to be matched with a grab bucket for water washing, and a negative-pressure feeding ash storage bin is preferably adopted, so that the full ash supply flow of feeding, discharging, primary dissolving and the like of machine head ash under a closed working condition can be realized.
The washing process adopts a three-stage countercurrent washing process, and the washing ratio can be controlled to be 3: 1-1: 1.
Solid-liquid separation for deashing can be realized by selecting plate-and-frame filter pressing with wide application range, low risk and investment cost and low failure rate; a horizontal spiral sedimentation centrifuge can also be preferably adopted, so that the manual operation intensity is reduced.
The pretreatment mainly aims at the treatment of hardness, heavy metals, chromaticity and the like in the washing water. Heavy metals and softened sludge in the sintering machine head ash produced water need to be treated by outsourcing, so that the content of the heavy metals in the sintering machine is avoided. Heavy metals in the waste fly ash produced water can be preferably mixed with the filter pressing of qualified wet ash, and are solidified in cement lattices in the synergistic treatment process, so that the harmless treatment is realized. Therefore, the sludge generated from the sintering machine head ash can be preferably used in a cement co-treatment process, and can be treated harmlessly.
The sintering machine head ash crystallization salt separation obtains a scientific salt separation route according to the phase diagram analysis of a ternary system: the hot method is used for primary extraction of potassium chloride, the cold method is used for deep extraction of potassium chloride, and the hot method is used for primary extraction of sodium chloride. Through the crystallization and salt separation route, by-products of potassium chloride and sodium chloride with high purity can be obtained, and the recycling of potassium sodium salt in sintering machine head ash is realized.
The waste fly ash crystallization salt separation obtains a scientific salt separation route according to the phase diagram analysis of a ternary system: sodium chloride is extracted by a hot method and potassium chloride is extracted by a cold method. Through the crystallization and salt separation route, by-products of potassium chloride and sodium chloride with high purity can be obtained, and the recycling of potassium sodium salt in the waste fly ash is realized.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A recycling process of potassium and sodium salt in sintering machine head ash and garbage fly ash, which is characterized by comprising the following steps,
(1) the cache storage bin adopts a simple warehouse to be matched with a grab bucket for washing, so that the full flow of loading, unloading and primary dissolving ash supply of machine head ash under a closed working condition is realized;
(2) the water washing adopts a three-stage countercurrent water washing process;
(3) solid-liquid separation for deashing, plate-and-frame filter pressing or a horizontal spiral sedimentation centrifuge is selected;
(4) heavy metals in the waste fly ash water are jointly mixed by filter pressing of qualified wet ash and are solidified in cement lattices in the process of cooperative treatment.
2. The recycling process of potassium and sodium salts in sintering machine head ash and waste fly ash according to claim 1, characterized in that in step (1), the cache silo adopts a negative pressure feeding ash storage silo.
3. The recycling process of potassium and sodium salts in sintering machine head ash and garbage fly ash according to claim 1, characterized in that in the step (2), the washing ratio is controlled to be 3: 1-1: 1.
4. The recycling process of potassium and sodium salt in sintering machine head ash and garbage fly ash according to claim 3, characterized by further comprising step (5) after step (4), according to salt separation system obtained water and salt system phase equilibrium data, editing water and salt system phase equilibrium data into excel to convert into corresponding fitting function; and compiling the obtained fitting function relationship into excel to obtain the salt control data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210235560.XA CN114573005A (en) | 2022-03-11 | 2022-03-11 | Potassium-sodium salt recycling process for sintering machine head ash and garbage fly ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210235560.XA CN114573005A (en) | 2022-03-11 | 2022-03-11 | Potassium-sodium salt recycling process for sintering machine head ash and garbage fly ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114573005A true CN114573005A (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210235560.XA Pending CN114573005A (en) | 2022-03-11 | 2022-03-11 | Potassium-sodium salt recycling process for sintering machine head ash and garbage fly ash |
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| Country | Link |
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| CN (1) | CN114573005A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161490A (en) * | 2011-01-28 | 2011-08-24 | 北京市琉璃河水泥有限公司 | System and method for extracting potassium sodium salt from garbage incineration fly ash |
| CN109133472A (en) * | 2018-10-08 | 2019-01-04 | 丁仲军 | Garbage flying ash resource utilization treatment process |
| CN109455738A (en) * | 2018-12-28 | 2019-03-12 | 杭州秀澈环保科技有限公司 | A kind of technique using garbage flying ash preparation high-quality Nacl |
| CN110255933A (en) * | 2019-07-09 | 2019-09-20 | 北京金隅琉水环保科技有限公司 | A kind of flying dust washing cement kiln synergic processing and resource comprehensive utilization system and method |
| CN110369451A (en) * | 2019-07-22 | 2019-10-25 | 中南大学 | A kind of method that sintering machine head end ash is utilized with incineration of refuse flyash coordination with the synthesis |
| CN113105138A (en) * | 2021-04-16 | 2021-07-13 | 北京中科国润环保科技有限公司 | Method and system for water washing dechlorination of waste incineration fly ash and evaporation mass-separation crystallization of water washing liquid |
| CN113233798A (en) * | 2021-05-21 | 2021-08-10 | 华新环境工程有限公司 | Cement kiln dust/fly ash washing salt extraction treatment system and use method thereof |
| CN113751214A (en) * | 2021-08-11 | 2021-12-07 | 广州维港环保科技有限公司 | System and process for resourcefully treating waste incineration fly ash |
-
2022
- 2022-03-11 CN CN202210235560.XA patent/CN114573005A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161490A (en) * | 2011-01-28 | 2011-08-24 | 北京市琉璃河水泥有限公司 | System and method for extracting potassium sodium salt from garbage incineration fly ash |
| CN109133472A (en) * | 2018-10-08 | 2019-01-04 | 丁仲军 | Garbage flying ash resource utilization treatment process |
| CN109455738A (en) * | 2018-12-28 | 2019-03-12 | 杭州秀澈环保科技有限公司 | A kind of technique using garbage flying ash preparation high-quality Nacl |
| CN110255933A (en) * | 2019-07-09 | 2019-09-20 | 北京金隅琉水环保科技有限公司 | A kind of flying dust washing cement kiln synergic processing and resource comprehensive utilization system and method |
| CN110369451A (en) * | 2019-07-22 | 2019-10-25 | 中南大学 | A kind of method that sintering machine head end ash is utilized with incineration of refuse flyash coordination with the synthesis |
| CN113105138A (en) * | 2021-04-16 | 2021-07-13 | 北京中科国润环保科技有限公司 | Method and system for water washing dechlorination of waste incineration fly ash and evaporation mass-separation crystallization of water washing liquid |
| CN113233798A (en) * | 2021-05-21 | 2021-08-10 | 华新环境工程有限公司 | Cement kiln dust/fly ash washing salt extraction treatment system and use method thereof |
| CN113751214A (en) * | 2021-08-11 | 2021-12-07 | 广州维港环保科技有限公司 | System and process for resourcefully treating waste incineration fly ash |
Non-Patent Citations (1)
| Title |
|---|
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Application publication date: 20220603 |