CN111960473B - Waste liquid treatment integrated equipment and treatment method for ferrous chloride hydrochloric acid solution - Google Patents
Waste liquid treatment integrated equipment and treatment method for ferrous chloride hydrochloric acid solution Download PDFInfo
- Publication number
- CN111960473B CN111960473B CN202011010009.2A CN202011010009A CN111960473B CN 111960473 B CN111960473 B CN 111960473B CN 202011010009 A CN202011010009 A CN 202011010009A CN 111960473 B CN111960473 B CN 111960473B
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- China
- Prior art keywords
- waste liquid
- hydrochloric acid
- ferrous chloride
- acid solution
- drying section
- Prior art date
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- 239000002699 waste material Substances 0.000 title claims abstract description 42
- 239000007788 liquid Substances 0.000 title claims abstract description 41
- VEXZGXHMUGYJMC-UHFFFAOYSA-N hydrochloric acid Substances Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229960002089 ferrous chloride Drugs 0.000 title claims abstract description 38
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000001035 drying Methods 0.000 claims abstract description 51
- 239000007789 gas Substances 0.000 claims abstract description 30
- 238000009835 boiling Methods 0.000 claims abstract description 26
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000001354 calcination Methods 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 23
- 239000002002 slurry Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims 1
- 239000011819 refractory material Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 239000013078 crystal Substances 0.000 abstract description 4
- 229910000041 hydrogen chloride Inorganic materials 0.000 abstract description 4
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002253 acid Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000005554 pickling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/03—Preparation from chlorides
- C01B7/035—Preparation of hydrogen chloride from chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
- C01B7/07—Purification ; Separation
- C01B7/0706—Purification ; Separation of hydrogen chloride
-
- 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention provides waste liquid treatment integrated equipment of ferrous chloride hydrochloric acid solution, which sequentially comprises a gas purifying chamber, a drying section, a rotary boiling calciner and a storage bin from top to bottom, wherein the lower end of the gas purifying chamber is fixed with the drying section through a connecting flange, the lower end of the drying section is fixed with the rotary boiling calciner through a connecting flange, and the storage bin is arranged at the bottom end of the rotary boiling calciner. The invention further provides a method for treating the waste liquid of the ferrous chloride hydrochloric acid solution by adopting the integrated equipment. The method for treating the waste liquid of the ferrous chloride hydrochloric acid solution directly recovers the iron oxide and the hydrogen chloride gas from the waste liquid of the ferrous chloride hydrochloric acid through integrated treatment equipment and by adopting a drying and calcining technology, the product obtained by the method is the iron oxide, the product value is far better than that of ferrous chloride crystals, and the method recycles the waste liquid of the ferrous chloride hydrochloric acid solution, has higher economic benefit and is beneficial to environmental protection.
Description
Technical Field
The invention belongs to the technical field of waste liquid treatment, and relates to waste liquid treatment integrated equipment and a treatment method of ferrous chloride hydrochloric acid solution.
Background
Currently, in the metallurgical and metal processing industries, in order to improve the surface structure of steel or process the surface, the surface of steel is often chemically cleaned by the corrosive action of strong acid (hydrochloric acid or sulfuric acid) to remove oxidized rust on the surface of steel, and when the cleaning is performed to a certain extent, the concentration of acid in the cleaning solution is reduced, resulting in a slow pickling rate, and new acid must be replaced to maintain a proper pickling rate. The waste liquid generated in the pickling is discharged to form the waste liquid containing high-concentration metal ions and residual acid, and the discharge amount of the waste liquid is increased along with the increase of the yield of the steel. The waste liquid has been managed as hazardous waste by countries due to its severe corrosiveness.
In the prior art, a ferrous chloride hydrochloric acid solution is generally subjected to steam indirect heating and negative pressure evaporation concentration process, and gas generated by evaporation is condensed into dilute hydrochloric acid through a condenser and returned to an acid washing workshop for reuse; after the waste acid liquid is evaporated and concentrated to lead ferrous chloride to reach a certain concentration, the concentrated solution is cooled to lead ferrous chloride to be separated out in a crystallization form, and then the ferrous chloride crystals are obtained through centrifugal separation, so that the market value of the product is low, the separation and obtaining mode is complex, the equipment and the process are complex, and the iron oxide can not be directly obtained.
Disclosure of Invention
In order to solve the technical problems, the invention provides integrated equipment and a method for treating waste liquid of a ferrous chloride hydrochloric acid solution. The method for treating the waste liquid of the ferrous chloride hydrochloric acid solution directly recovers the iron oxide and the hydrogen chloride gas from the waste liquid of the ferrous chloride hydrochloric acid solution through integrated treatment equipment and by adopting a drying and calcining technology, the product obtained by the method is the iron oxide, the product value is far better than that of ferrous chloride crystals, and the method recycles the waste liquid of the ferrous chloride hydrochloric acid solution, has higher economic benefit and is beneficial to environmental protection.
In order to achieve the above purpose, the invention adopts the following technical scheme: the integrated equipment for treating the waste liquid of the ferrous chloride hydrochloric acid solution sequentially comprises a gas purifying chamber, a drying section, a rotary boiling calciner and a storage bin from top to bottom, wherein the lower end of the gas purifying chamber is fixed with the drying section through a connecting flange, the lower end of the drying section is fixed with the rotary boiling calciner through a connecting flange, and the storage bin is arranged at the bottom end of the rotary boiling calciner.
Further, the inside bottom of air-purifying chamber is equipped with the card, is equipped with a plurality of air vents on the card, corresponds the position on every air vent and installs filter bag and skeleton subassembly, and filter bag and skeleton subassembly set up in the air-purifying chamber, installs a plurality of air bags in the outside of air-purifying chamber, is equipped with the pulse valve on every air bag, and air bag bottom and the jetting pipe intercommunication that sets up in the air-purifying chamber inside, the jetting pipe in addition with the upper end of filter bag and skeleton subassembly's filter bag is linked together, and the pulse valve passes through pulse controller control, carries out the bag-by-bag jetting to filter bag and skeleton subassembly's filter bag, installs the apron in the top of air-purifying chamber, seals air-purifying chamber top opening, and the bottom of air-purifying chamber is equipped with flange for being connected with the dry section.
Further, the air outlet end of the air purifying chamber is connected with the inlet of the induced draft fan through a pipeline, the outlet of the induced draft fan is communicated with the tail gas purifying system through a pipeline, and purified tail gas can be directly recovered.
Further, the drying section comprises a first cylinder body and a high-pressure spraying mechanism, connecting flanges are respectively arranged at the upper end and the lower end of the first cylinder body, the high-pressure spraying mechanism is arranged in the first cylinder body and consists of a plurality of concentric circular pipes, each circular pipe is fixed on the inner wall of the first cylinder body in a layered mode, a plurality of spraying holes are uniformly distributed on each circular pipe, and each circular pipe is connected with the slurry pump through a feeding pipe.
Further, the first cylinder is a two-layer steel cylinder, and the inner wall of the two-layer steel cylinder is provided with a heat insulation material layer.
Further, the rotary boiling calciner comprises a second cylinder body, 6-10 heat source air inlet channels are arranged on the periphery of the second cylinder body, a temperature measuring and pressure measuring device is arranged on the second cylinder body, a connecting flange is arranged at the upper end of the second cylinder body, and the bottom end of the second cylinder body is fixed on the ground through a support.
Further, the second cylinder is a steel cylinder, and a refractory and temperature-resistant material layer is arranged on the inner wall of the steel cylinder.
The invention further provides a method for treating the waste liquid of the ferrous chloride hydrochloric acid solution by adopting the integrated equipment, which comprises the following specific implementation steps:
the waste liquid slurry of the ferrous chloride hydrochloric acid solution enters a high-pressure spraying mechanism through the action of a slurry pump, and is dried in a drying section through high-pressure spraying to form a powdery material;
the powdery material directly enters a rotary boiling calciner for calcination, and the iron oxide material generated after calcination enters a cooling system through a storage bin.
Meanwhile, the flue gas generated in the drying and calcining process carries the material to move upwards along the rotary boiling calciner, the drying section and the high-pressure spraying mechanism under the action of the induced draft fan, the flue gas enters the clean gas chamber for filtering, the filtered flue gas enters the tail gas purifying system, the purified gas can be directly recovered, the filtered material is sprayed in the clean gas chamber through the spraying pipe to settle the filtered material to the high-temperature drying section, and the filtered material is mixed with the slurry pumped by the slurry pump again to carry out drying and calcining together.
Further, the drying temperature in the drying section is controlled to be 450-600 ℃, and the drying time is 3-5 s.
Further, the calcination temperature is controlled between 650 ℃ and 1150 ℃.
Compared with the prior art, the invention has the following beneficial effects: the waste liquid treatment equipment is integrated equipment, and comprises a high-pressure spraying mechanism, a drying section, a rotary boiling calciner and a clean air chamber, wherein the equipment of each working section is directly connected through a connecting flange without auxiliary equipment such as a pipeline, so that the heat energy utilization efficiency can be improved, the heat utilization rate is improved, the power consumption of the equipment is reduced, the equipment investment cost is reduced, and the occupied area of the equipment is reduced. The integrated equipment can also realize totally-enclosed production, is beneficial to the environment, and improves the utilization rate of waste liquid products. The system adopts electric automation control, can remotely monitor and operate equipment, collect data and adjust the service performance of the equipment.
The method for treating the waste liquid of the ferrous chloride hydrochloric acid solution directly recovers the iron oxide and the hydrogen chloride gas from the ferrous chloride hydrochloric acid waste liquid by adopting integrated treatment equipment and a drying and calcining technology, the product obtained by the method is the iron oxide, the product value is far better than that of ferrous chloride crystals, the method recycles the waste liquid of the ferrous chloride hydrochloric acid solution, the method has higher economic benefit, and is beneficial to environmental protection, the next process or direct package and storage can be carried out on the iron oxide according to the needs of users, and the hydrogen chloride gas can be recycled.
Drawings
FIG. 1 is a schematic view of an integrated waste liquid treatment apparatus according to the present invention;
FIG. 2 is a schematic view of the structure of the high pressure spray mechanism;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
in the figure: 1-a clean air chamber; 1-1-an air outlet end; 2-a drying section; 2-1-a first cylinder; 2-2-high pressure spraying mechanism; 2-2-1-circular ring pipe; 2-2-2-spraying holes; 2-2-3-feeding pipe; 3-a rotary boiling calciner; 3-1-a second cylinder; 3-2-heat source air inlet channel; 4-a storage bin; 5-flower plates; 6-a filter bag and skeleton assembly; 7, air bag; 8-pulse valve; 9-blowing pipe; 10-cover plate; 11-induced draft fan; 12-an exhaust gas purification system; 13-a fixing frame; 14-guard rails; 15-a bracket.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1, the integrated equipment for treating waste liquid of ferrous chloride hydrochloric acid solution sequentially comprises a gas purifying chamber 1, a drying section 2, a rotary boiling calciner 3 and a storage bin 4 from top to bottom, wherein the lower end of the gas purifying chamber 1 is fixed with the drying section 2 through a connecting flange, the lower end of the drying section 2 is fixed with the rotary boiling calciner 3 through a connecting flange, and the storage bin 4 is arranged at the bottom end of the rotary boiling calciner 3.
The inside bottom of air-purifying chamber 1 is equipped with colored board 5, is equipped with a plurality of air vents on the colored board 5, corresponds the position on every air vent and installs filter bag and skeleton subassembly 6, and filter bag and skeleton subassembly 6 set up in air-purifying chamber 1, installs a plurality of air bags 7 in the outside of air-purifying chamber 1, is equipped with pulse valve 8 on every air bag 7, and air bag 7 bottom and the jetting pipe 9 intercommunication that sets up in the air-purifying chamber are inside, jetting pipe 9 in addition with the upper end of the filter bag of filter bag and skeleton subassembly 6 is linked together, and pulse valve 8 passes through pulse controller control, carries out the bag-by-bag jetting to the filter bag of filter bag and skeleton subassembly 6, installs apron 10 in the top of air-purifying chamber 1, seals air-purifying chamber 1 top opening, and the bottom of air-purifying chamber 1 is equipped with flange for being connected with dry section 2.
The air outlet end 1-1 of the air purifying chamber 1 is connected with the inlet of an induced draft fan 11 through a pipeline, the outlet of the induced draft fan 11 is communicated with a tail gas purifying system 12 through a pipeline, and purified tail gas can be directly recovered.
The drying section 2 comprises a first cylinder 2-1 and a high-pressure spraying mechanism 2-2, connecting flanges are respectively arranged at the upper end and the lower end of the first cylinder 2-1, the high-pressure spraying mechanism 2-2 is arranged in the first cylinder 2-1, referring to fig. 2, the high-pressure spraying mechanism 2-2 consists of a plurality of concentric circular pipes 2-2-1, each circular pipe 2-1 is fixed on the inner wall of the first cylinder 2-1 in a layered manner, each circular pipe 2-2-1 can be fixed with the inner wall of the first cylinder 2-1 through 2 symmetrically inclined fixing frames 13, the diameter of each circular pipe is gradually increased from right to top, a plurality of spraying holes 2-2-2 are respectively distributed on each circular pipe 2-2-1, each circular pipe 2-2-1 is respectively connected with a slurry pump through a feeding pipe 2-2-3, and the slurry pump conveys waste liquid slurry of a ferrous chloride solution into each circular pipe 2-1 of the high-pressure spraying mechanism 2-2, and if the waste liquid slurry enters the drying section 2-2-2 through the corresponding circular pipe 2-2-2.
The first cylinder body 2-1 is a two-layer steel cylinder body, and the inner wall of the two-layer steel cylinder body is provided with a heat preservation material layer.
An air inlet 2-1-1 is arranged at the lower end of the first cylinder 2-1, and an air distribution valve and a temperature sensor are arranged at the air inlet 2-1-1.
Referring to fig. 3, the rotary boiling calciner 3 includes a second cylinder 3-1, 6-10 heat source air inlet channels 3-2 are provided at the periphery of the second cylinder 3-1, and are used for being connected with a heat source providing device, providing heat sources for the drying section 2 and the rotary boiling calciner 3, and a temperature and pressure measuring device is provided on the second cylinder 3-1, and is used for detecting the temperature and pressure in the rotary boiling calciner 3, so that the calcination temperature is controlled at 650-1150 ℃, and a connecting flange is provided at the upper end of the second cylinder 3-1, and the bottom end of the second cylinder 3-1 is fixed on the ground through a bracket 15.
The second cylinder 3-1 is a steel cylinder, and a refractory and temperature-resistant material layer is arranged on the inner wall of the steel cylinder.
The filter bag in the filter bag and skeleton component 6 is a high temperature resistant steel filter bag, and the skeleton is made of stainless steel.
High-temperature-resistant sealing gaskets are arranged at the connection positions of the connecting flanges among the clean air chamber 1, the drying section 2 and the rotary boiling calciner 3, so that the connection tightness is ensured.
A guard rail 14 is also installed over the outside of the clean air chamber 1.
The invention further provides a method for treating the waste liquid of the ferrous chloride hydrochloric acid solution by adopting the integrated equipment, which comprises the following specific implementation steps:
the waste liquid slurry of the ferrous chloride hydrochloric acid solution enters a high-pressure spraying mechanism 2-2 under the action of a slurry pump, and is dried in a drying section 2 through high-pressure spraying to form a powdery material; the drying temperature in the drying section 2 is controlled at 450-600 ℃, the drying time is 3-5 s, and the instant drying is realized; when the temperature sensor at the air inlet 2-1-1 of the first cylinder body 2-1 of the drying section detects that the temperature in the drying section exceeds 450-600 ℃, an air distribution valve is opened to cool the drying section.
The powdery material directly enters a rotary boiling calciner 3 for calcination, and the calcination temperature is controlled to be 650-1150 ℃. The oxide material of the iron generated after calcination enters a cooling system through a storage bin 4. In actual production, the corresponding calcination temperature can be set according to the specific iron oxide type required.
At the same time, the flue gas generated in the drying and calcining process carries the material to move upwards along the rotary boiling calciner 3, the drying section 2 and the high-pressure spraying mechanism 2-2 under the action of the induced draft fan 11, enters the air purifying chamber 1 for filtering, the filtered flue gas enters the tail gas purifying system 12, the purified gas can be directly recovered, the filtered material is in the air purifying chamber 1 and is blown through the blowing pipe 9 to be settled to the high-temperature drying section 2, and the filtered material is mixed with the slurry pumped by the slurry pump again to be dried and calcined together.
The integrated equipment and the waste liquid treatment method can greatly improve the heat utilization rate, and the heat utilization rate is up to more than 85%. The integrated equipment can reduce heat loss in the connection process of each device of the split equipment.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. The integrated equipment for treating the waste liquid of the ferrous chloride hydrochloric acid solution is characterized by comprising a gas purifying chamber, a drying section, a rotary boiling calciner and a storage bin from top to bottom in sequence, wherein the lower end of the gas purifying chamber is fixed with the drying section through a connecting flange, the lower end of the drying section is fixed with the rotary boiling calciner through a connecting flange, and the storage bin is arranged at the bottom end of the rotary boiling calciner;
the inner bottom end of the air purifying chamber is provided with a flower plate, a plurality of vent holes are formed in the flower plate, a filter bag and a framework component are arranged at corresponding positions on each vent hole, the filter bag and the framework component are arranged in the air purifying chamber, a plurality of air bags are arranged on the outer side of the air purifying chamber, a pulse valve is arranged on each air bag, the bottom end of each air bag is communicated with a blowing pipe arranged in the air purifying chamber, the blowing pipes are additionally communicated with the upper ends of the filter bags of the filter bag and the framework component, the pulse valves are controlled by a pulse controller to carry out bag-by-bag blowing on the filter bags of the filter bag and the framework component, a cover plate is arranged above the air purifying chamber, an opening above the air purifying chamber is closed, and the bottom of the air purifying chamber is provided with a connecting flange for being connected with a drying section;
the drying section comprises a first cylinder body and a high-pressure spraying mechanism, wherein connecting flanges are respectively arranged at the upper end and the lower end of the first cylinder body, the high-pressure spraying mechanism is arranged in the first cylinder body and consists of a plurality of concentric circular pipes, each circular pipe is fixed on the inner wall of the first cylinder body in a layered manner, a plurality of spraying holes are uniformly distributed on each circular pipe, and each circular pipe is connected with a slurry pump through a feeding pipe;
the rotary boiling calciner comprises a second cylinder body, 6-10 heat source air inlet channels are arranged on the outer periphery of the second cylinder body, a temperature measuring and pressure measuring device is arranged on the second cylinder body, a connecting flange is arranged at the upper end of the second cylinder body, and the bottom end of the second cylinder body is fixed on the ground through a support.
2. The integrated apparatus for treating waste liquid of ferrous chloride and hydrochloric acid solution as set forth in claim 1, wherein the air outlet end of the air purifying chamber is connected to the inlet of the induced draft fan via a pipe, the outlet of the induced draft fan is connected to the exhaust gas purifying system via a pipe, and the purified exhaust gas can be directly recovered.
3. The integrated apparatus for treating waste liquid of ferrous chloride hydrochloric acid solution as set forth in claim 1, wherein the first cylinder is a two-layered steel cylinder, and a heat insulating material layer is provided on an inner wall of the two-layered steel cylinder.
4. The integrated apparatus for treating waste liquid of ferrous chloride hydrochloric acid solution as set forth in claim 1, wherein the second cylinder is a steel cylinder, and a refractory material layer is provided on an inner wall of the steel cylinder.
5. The method for treating the waste liquid of the ferrous chloride hydrochloric acid solution by adopting the integrated equipment for treating the waste liquid of the ferrous chloride hydrochloric acid solution according to any one of claims 1 to 4 comprises the following specific implementation steps:
the waste liquid slurry of the ferrous chloride hydrochloric acid solution enters a high-pressure spraying mechanism through the action of a slurry pump, and is dried in a drying section through high-pressure spraying to form a powdery material;
the powdery material directly enters a rotary boiling calciner for calcination, and the iron oxide material generated after calcination enters a cooling system through a storage bin;
meanwhile, the flue gas generated in the drying and calcining process carries the material to move upwards along the rotary boiling calciner, the drying section and the high-pressure spraying mechanism under the action of the induced draft fan, the flue gas enters the clean gas chamber for filtering, the filtered flue gas enters the tail gas purifying system, the purified gas can be directly recovered, the filtered material is sprayed in the clean gas chamber through the spraying pipe to settle the filtered material to the high-temperature drying section, and the filtered material is mixed with the slurry pumped by the slurry pump again to carry out drying and calcining together.
6. The method for treating waste liquid of ferrous chloride hydrochloric acid solution according to claim 5, wherein the drying temperature in the drying section is controlled to be 450-600 ℃ and the drying time is 3-5 s.
7. The method for treating a waste liquid of a ferrous chloride hydrochloric acid solution according to claim 5, wherein the calcination temperature is controlled to 650 ℃ to 1150 ℃.
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| CN202011010009.2A CN111960473B (en) | 2020-09-23 | 2020-09-23 | Waste liquid treatment integrated equipment and treatment method for ferrous chloride hydrochloric acid solution |
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| CN202011010009.2A CN111960473B (en) | 2020-09-23 | 2020-09-23 | Waste liquid treatment integrated equipment and treatment method for ferrous chloride hydrochloric acid solution |
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| CN111960473A CN111960473A (en) | 2020-11-20 |
| CN111960473B true CN111960473B (en) | 2024-03-29 |
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| CN104828995A (en) * | 2015-05-20 | 2015-08-12 | 中冶东方工程技术有限公司 | Treatment method of ferrous waste hydrochloric acid |
| CN205653510U (en) * | 2013-09-26 | 2016-10-19 | 安德里特斯公开股份有限公司 | Be used for palingenetic equipment of hydrochloric acid |
| CN108531919A (en) * | 2018-04-23 | 2018-09-14 | 焦作市雾神化工设备有限公司 | A kind of acid washing rolled steel liquid-tight road circulation producing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212315572U (en) * | 2020-09-23 | 2021-01-08 | 沈阳宇能机械工程科技有限公司 | Integrated waste liquid treatment equipment for ferrous chloride hydrochloric acid solution |
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| CN101343123A (en) * | 2007-07-11 | 2009-01-14 | 郝国臣 | Technique for recycling acid waste liquid of strip steel |
| CN205653510U (en) * | 2013-09-26 | 2016-10-19 | 安德里特斯公开股份有限公司 | Be used for palingenetic equipment of hydrochloric acid |
| CN104649335A (en) * | 2013-11-21 | 2015-05-27 | 张家港市骏马钢帘线有限公司 | Method and device for recycling ferrous chloride crystal and hydrochloric acid from chlorohydric acid pickling waste solution |
| CN104828995A (en) * | 2015-05-20 | 2015-08-12 | 中冶东方工程技术有限公司 | Treatment method of ferrous waste hydrochloric acid |
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