CN111545551A - Device and method for treating chlorinated dust collection slag - Google Patents
Device and method for treating chlorinated dust collection slag Download PDFInfo
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- CN111545551A CN111545551A CN202010406358.XA CN202010406358A CN111545551A CN 111545551 A CN111545551 A CN 111545551A CN 202010406358 A CN202010406358 A CN 202010406358A CN 111545551 A CN111545551 A CN 111545551A
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- slag
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- 239000002893 slag Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000428 dust Substances 0.000 title claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000005660 chlorination reaction Methods 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000002351 wastewater Substances 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 150000003839 salts Chemical class 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 50
- 239000013049 sediment Substances 0.000 claims description 28
- 239000000243 solution Substances 0.000 claims description 19
- 239000007789 gas Substances 0.000 claims description 15
- 239000012267 brine Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 10
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 9
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 6
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 6
- 239000002912 waste gas Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000002440 industrial waste Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 abstract description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000011780 sodium chloride Substances 0.000 abstract description 4
- 239000010936 titanium Substances 0.000 abstract description 4
- 229910052719 titanium Inorganic materials 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 4
- 238000004064 recycling Methods 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/10—Destroying solid waste or transforming solid waste into something useful or harmless involving an adsorption step
-
- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
-
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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
- C01D3/06—Preparation by working up brines; seawater or spent lyes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a chlorination dust-collecting slag treatment device and a treatment method in the technical field of comprehensive treatment of three wastes in the titanium industry. The device is utilized to decompose the chlorination dust-collecting slag by adding water to obtain a water solution, and the water solution reacts with the wastewater containing hypochlorite generated by the chlorination production tail gas treatment system and is filtered to obtain the iron-containing slag and saline water, the iron-containing slag can be stockpiled and utilized, the saline water can be evaporated, crystallized and recycled to obtain salt, the treatment method is simple, the chlorination dust-collecting slag and the wastewater containing hypochlorite are comprehensively treated and utilized, and the environmental protection problem caused by the conventional chlorination dust-collecting slag treatment mode is better solved.
Description
Technical Field
The invention relates to the technical field of comprehensive treatment of three wastes in titanium industry, in particular to a treatment device and a treatment method of dust-collecting slag generated in the process of preparing titanium tetrachloride by titanium slag chlorination.
Background
The chloride dust-collecting slag generated in the process of preparing titanium tetrachloride by adopting a boiling chlorination or molten salt chlorination process for titanium slag contains various chloride salts such as ferrous chloride, ferric chloride, magnesium chloride, calcium chloride and the like and a small amount of titanium tetrachloride, and can generate heat and smoke and generate irritant gas due to hydrolysis of the salts, the titanium tetrachloride and the like in the transportation and stacking processes.
Disclosure of Invention
In order to overcome the defects of the existing dust collection slag treatment mode, the invention aims to solve the technical problems that: provides a chlorinated dust-collecting slag treatment device and a treatment method capable of recycling dust-collecting slag.
The technical scheme adopted by the invention for solving the technical problems is as follows:
chloridizing and collecting slag processing apparatus, including gathering dust the sediment jar, sediment liquid bath and filter, be equipped with water inlet and gas vent on the cover of the sediment jar of gathering dust, gas vent department is connected with the blast pipe that lets in sediment liquid bath bottom, it is equipped with the fluid-discharge tube that lets in the sediment liquid bath to gather dust the sediment bottom of the jar, still be equipped with the inlet tube that supplies chloridizing tail gas alkali wash waste water to let in the sediment liquid bath to and the sediment thick liquid pipe that communicates with the filter, be equipped with the sediment thick liquid pump on the sediment thick liquid.
Furthermore, the water inlet is provided with two water inlet branches, one branch is connected with external water supply equipment, the other branch is communicated with the upper part of the slag liquid pool through a drain pipe, and the drain pipe is provided with a drain pump.
Further, a stirrer is arranged in the slag liquid pool.
Further, the filter is a filter press.
Further, the filter comprises a slag outlet and a liquid outlet, a backflow branch pipe is arranged at the liquid outlet and communicated with a water inlet of the dust collecting slag tank, and a valve is arranged on the backflow branch pipe.
The method for treating the chlorination dust-collecting slag by adopting the chlorination dust-collecting slag treatment device comprises the following steps:
a. removing the dust collecting slag tank filled with dust collecting slag from a chlorination dust collecting system, adding water from a water inlet to obtain a chlorination dust collecting slag aqueous solution, allowing waste gas containing a small amount of hydrogen chloride generated in the dissolving and reacting process to enter the bottom of a slag liquid pool through an exhaust pipe under the pressure effect and discharging, wherein the hydrogen chloride in the waste gas is absorbed in the solution;
b. putting the water solution into a slag liquid pool through a liquid discharge pipe, mixing with the sodium hypochlorite-containing solution introduced from the water inlet pipe, and reacting;
c. and after the reaction is finished, introducing the mixed solution into a filter by using a slurry pump for filtering, and finally filtering to obtain iron-containing slag and brine, wherein the iron-containing slag is used as general industrial waste for stacking or comprehensive utilization, and the brine is returned to decompose the dust-collecting slag or is evaporated and crystallized to prepare industrial salt.
Further, the solution containing sodium hypochlorite is sodium hypochlorite-containing wastewater generated by circularly washing the chlorinated tail gas treatment system with a sodium hydroxide solution.
Further, before filtering the mixed liquid in the slag liquid pool, the pH value of the solution needs to be controlled to be 6-9, otherwise, a small amount of acid or alkali is used for adjusting.
The invention has the beneficial effects that: by adopting the device and the method for treating the chlorinated dust-collecting slag, the chlorinated dust-collecting slag is added with water and decomposed to obtain a water solution, and the water solution reacts with the wastewater containing hypochlorite generated by the chlorination production tail gas treatment system and is filtered to obtain the iron-containing slag and saline water, the iron-containing slag can be stacked and utilized, the saline water can be evaporated, crystallized and recycled to obtain salt, the treatment method is simple, the chlorinated dust-collecting slag and the wastewater containing hypochlorite are comprehensively treated and utilized, and the environmental protection problem caused by the conventional chlorinated dust-collecting slag treatment mode is better solved.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Marked in the figure as 1-dust collecting slag tank, 2-slag liquid pool, 3-filter, 4-slurry pump, 5-draining pump, 6-stirrer, 7-valve, 11-exhausting pipe, 12-draining pipe, 13-draining pipe, 21-water inlet pipe, 22-slag slurry pipe and 31-reflux branch pipe.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the chlorination dust collection slag processing apparatus of this application, including the sediment jar 1 that gathers dust, sediment liquid pool 2 and filter 3, be equipped with water inlet and gas vent on the cover of the sediment jar of gathering dust, gas vent department is connected with the blast pipe 11 that lets in 2 bottoms in sediment liquid pool, 1 bottoms in the sediment jar of gathering dust are equipped with the fluid-discharge tube 12 that lets in sediment liquid pool 2, still be equipped with the inlet tube 21 that supplies chlorination tail gas alkaline cleaning waste water to let in the sediment liquid pool 2 to and the sediment thick liquid pipe 22 that communicates with filter 3, be equipped with thick liquid pump 4 on the thick liquid pipe 22 of sediment.
The method for treating the chlorination dust collection slag by using the device comprises the following steps:
a. removing the dust collecting slag tank 1 filled with dust collecting slag from a chlorination dust collecting system, adding water from a water inlet to obtain a chlorination dust collecting slag aqueous solution, introducing waste gas containing a small amount of hydrogen chloride generated in the dissolving and reacting process into the bottom of a slag liquid pool through an exhaust pipe 11 under the pressure action, and discharging, wherein the hydrogen chloride in the waste gas is absorbed in the solution;
b. putting the water solution into a slag liquid pool 2 through a liquid discharge pipe 12, mixing with the sodium hypochlorite-containing solution introduced from a water inlet pipe 21, and reacting;
c. and after the reaction is finished, the mixed solution is introduced into a filter 3 by a slurry pump 4 for filtering, and finally iron-containing slag and brine are obtained by filtering, wherein the iron-containing slag is used as general industrial waste for stacking or comprehensive utilization, and the brine is returned to decompose dust-collecting slag or is evaporated and crystallized to prepare industrial salt.
Compared with the traditional burying scheme, the iron-containing slag obtained by treatment can be stockpiled and utilized, salt can be recovered by brine through evaporative crystallization, the treatment method is simple, the chlorinated dust-collecting slag and the wastewater containing hypochlorite are comprehensively treated and utilized, and the environmental protection problem caused by the conventional chlorinated dust-collecting slag treatment mode is better solved.
Because the chlorination tail gas treatment system usually adopts sodium hydroxide solution to circularly wash the production tail gas containing a small amount of chlorine to obtain alkaline waste water containing sodium hypochlorite, the waste water can be used as the sodium hypochlorite solution to be added into the slag liquid pool, and hypochlorite in the waste water and reducing substances such as ferrous ions in the slag liquid pool are subjected to redox reaction and consumed. In order to control the reaction degree and avoid the influence of subsequent emissions on the environment, the pH value of the mixed liquor in the slag-liquor pool is preferably controlled to be 6-9 before the mixed liquor is filtered, and if the mixing of the raw materials does not meet the emission requirement, a small amount of acid or alkali can be used for adjustment.
In order to realize the recycling of water resources, the water inlet is provided with two water inlet branches, one branch is connected with external water supply equipment, the other branch is communicated with the upper part of the slag liquid pool 2 through a drain pipe 13, and the drain pipe 13 is provided with a drain pump 5. After the slag liquid pool 2 is subjected to primary reaction, the supernatant can be pumped back to the dust collection slag tank 1 by a drainage pump 5 for recycling.
In order to enable a sufficiently rapid reaction of the solution in the slag bath 2, a stirrer 6 is provided in the slag bath 2. In order to improve the filtration efficiency, the filter 3 is a filter press.
Further, the filter 3 comprises a slag outlet and a liquid outlet, the liquid outlet is provided with a branch return pipe 31 communicated with a water inlet of the dust collection slag tank 1, and the branch return pipe 31 is provided with a valve 7. The brine obtained by filtering can be returned to the slag liquid pool for utilization according to requirements, and also can be directly added into a dust collection slag tank for decomposing dust collection slag or partially discharged to prepare industrial salt through evaporation and crystallization.
The method has the advantages that the iron-containing slag and the brine are prepared from the chlorinated dust-collecting slag by adopting the characteristic equipment and the treatment process, the iron-containing slag can be stockpiled and utilized, the brine can be evaporated and crystallized to recover the salt, the treatment method is simple, the chlorinated dust-collecting slag and the wastewater containing hypochlorite are comprehensively treated and utilized, the environmental protection problem caused by the conventional chlorinated dust-collecting slag treatment mode is well solved, and the method has good practicability and economic and social values.
Claims (8)
1. Chloridized dust collection slag treatment device, characterized by: including gathering dust slag ladle (1), sediment liquid bath (2) and filter (3), be equipped with water inlet and gas vent on the cover of the sediment slag ladle (1) of gathering dust, gas vent department is connected with blast pipe (11) that let in sediment liquid bath (2) bottom, sediment slag ladle (1) bottom of gathering dust is equipped with fluid-discharge tube (12) that let in sediment liquid bath (2), still be equipped with in sediment liquid bath (2) and supply chlorinated tail gas alkaline cleaning waste water to let in inlet tube (21) to and sediment thick liquid pipe (22) with filter (3) intercommunication, be equipped with sediment thick liquid pump (4) on sediment thick liquid pipe (22).
2. The chlorination dust collection slag treatment device as claimed in claim 1, wherein: the water inlet is provided with two water inlet branches, one branch is connected with external water supply equipment, the other branch is communicated with the upper part of the slag liquid pool (2) through a drain pipe (13), and the drain pipe (13) is provided with a drain pump (5).
3. The chlorination dust collection slag treatment device as claimed in claim 1, wherein: a stirrer (6) is arranged in the slag liquid pool (2).
4. The chlorination dust collection slag treatment device as claimed in claim 1, wherein: the filter (3) is a filter press.
5. The chlorination dust collection slag treatment device as claimed in claim 1, wherein: the filter (3) comprises a slag outlet and a liquid outlet, a backflow branch pipe (31) is arranged at the liquid outlet and communicated with a water inlet of the dust collection slag tank (1), and a valve (7) is arranged on the backflow branch pipe (31).
6. The method for treating the chlorination dust-collecting slag by using the chlorination dust-collecting slag treatment device as claimed in any one of claims 1 to 5, is characterized by comprising the following steps:
a. the method comprises the following steps of (1) removing a dust collecting slag tank (1) filled with dust collecting slag from a chlorination dust collecting system, adding water from a water inlet to obtain a chlorination dust collecting slag aqueous solution, enabling waste gas containing a small amount of hydrogen chloride generated in the dissolving and reacting processes to enter the bottom of a slag liquid pool (2) through an exhaust pipe (11) under the pressure effect and discharging, and enabling the hydrogen chloride in the waste gas to be absorbed in the solution;
b. putting the water solution into a slag liquid pool (2) through a liquid discharge pipe (12), mixing with the sodium hypochlorite-containing solution introduced from a water inlet pipe (21), and reacting;
c. and (3) after the reaction is finished, introducing the mixed solution into a filter (3) by using a slurry pump (4) for filtering, and finally filtering to obtain iron-containing slag and brine, wherein the iron-containing slag is stacked or comprehensively utilized as general industrial waste, and the brine is returned to decompose dust-collecting slag or is evaporated and crystallized to prepare industrial salt.
7. The method for treating the chlorinated dust-collecting slag by using the chlorinated dust-collecting slag treatment device as claimed in claim 6, wherein: the solution containing sodium hypochlorite adopts sodium hypochlorite-containing wastewater generated by alkaline washing in a chlorination tail gas treatment system.
8. The method for treating the chlorinated dust-collecting slag by using the chlorinated dust-collecting slag treatment device as claimed in claim 6, wherein: before filtering the mixed liquid in the slag liquid pool, the pH value of the solution needs to be controlled to be 6-9, otherwise, a small amount of acid or alkali is used for adjusting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010406358.XA CN111545551A (en) | 2020-05-14 | 2020-05-14 | Device and method for treating chlorinated dust collection slag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010406358.XA CN111545551A (en) | 2020-05-14 | 2020-05-14 | Device and method for treating chlorinated dust collection slag |
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|---|---|---|---|---|
| WO2009001365A1 (en) * | 2007-06-28 | 2008-12-31 | Asher Vitner Ltd. | A process for the production of titanium salts |
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| CN201873536U (en) * | 2010-12-07 | 2011-06-22 | 唐山天赫钛业有限公司 | Device for treating dust collecting slag generated in production of titanium tetrachloride |
| CN104772317A (en) * | 2014-01-14 | 2015-07-15 | 贵阳铝镁设计研究院有限公司 | Comprehensive treatment method for waste fused salts and dust collection slag produced through titanium tetrachloride fused salt chlorination |
| CN105883911A (en) * | 2016-04-07 | 2016-08-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Resourceful treatment method for fused salt chlorination residues |
-
2020
- 2020-05-14 CN CN202010406358.XA patent/CN111545551A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009001365A1 (en) * | 2007-06-28 | 2008-12-31 | Asher Vitner Ltd. | A process for the production of titanium salts |
| CN101746816A (en) * | 2008-12-11 | 2010-06-23 | 贵阳铝镁设计研究院 | Processing technique for chloridized dust collection slag |
| CN201873536U (en) * | 2010-12-07 | 2011-06-22 | 唐山天赫钛业有限公司 | Device for treating dust collecting slag generated in production of titanium tetrachloride |
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Application publication date: 20200818 |