CN114105426A - Waste acid recycling and regenerating on-line recycling system and process - Google Patents
Waste acid recycling and regenerating on-line recycling system and process Download PDFInfo
- Publication number
- CN114105426A CN114105426A CN202111443636.XA CN202111443636A CN114105426A CN 114105426 A CN114105426 A CN 114105426A CN 202111443636 A CN202111443636 A CN 202111443636A CN 114105426 A CN114105426 A CN 114105426A
- Authority
- CN
- China
- Prior art keywords
- recycling
- drying
- sludge
- waste acid
- online
- 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
Images
Classifications
-
- 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
- C02F1/001—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
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/36—Regeneration of waste pickling liquors
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
An online recycling treatment system and process for waste acid recycling regeneration belong to the technical field of waste acid regeneration, and comprises a waste acid regeneration system, wherein a drain outlet of the waste acid regeneration system is connected with a feed inlet of a drying system, a discharge outlet of the drying system is connected with a sorting sintering system, and a gas outlet of the drying system is connected with the feed inlet of the waste acid regeneration system; the invention has the advantages of short process flow, advanced technology and low energy consumption, realizes the online disposal of the sludge, avoids the secondary pollution of the sludge collection, storage, transportation and other links, and realizes the full-quantification and resource clean utilization of the sludge.
Description
Technical Field
The invention relates to the technical field of waste acid regeneration, in particular to an online recycling treatment system and process for waste acid recycling.
Background
In order to make the surface of the steel strip smooth and clean, hydrochloric acid is used for pickling and impurity removal on the steel strip before cold rolling, and waste pickle liquor is formed after pickling and impurity removal. The waste pickle liquor is regenerated to produce new hydrochloric acid for recycling. In the regeneration process, the waste acid liquor needs to be subjected to impurity removal, and sludge generated by impurity removal has high water content and is difficult to convey, and the sludge has high chlorine content and is easy to corrode processing equipment.
The following methods are therefore currently generally used: first, landfill disposal, which is a process for treating water-containing sludge by landfill, causes environmental pollution. Secondly, as a cement production raw material, the sludge is used as an unproductive raw material and is added into the cement production in a small amount, and chlorine-containing substances in the sludge can corrode cement production equipment. Thirdly, a wet separation process is adopted for treatment, after the wet separation process is adopted for treatment, the solid is used as a cement raw material, liquid is subjected to chemical reaction, flocculation precipitation, evaporation, crystallization and drying to obtain KCl, and precipitated impurities are used as the cement raw material, but the wet separation process is complex, the treatment cost is high, and secondary pollution is easy to generate. Fourthly, high-temperature roasting, in which chlorine-containing substances in the sludge are decomposed to form hydrochloric acid, has complex process and high energy consumption, and the sludge is easy to cause blockage of a roasting tower.
Therefore, the existing method for treating the water-containing sludge generated by waste acid treatment has the disadvantages of complex treatment process, high cost, easy corrosion to equipment, easy pollution generation and ineffective utilization of resources.
Disclosure of Invention
In order to solve the technical problems, the invention provides an online recycling treatment system and process for waste acid recycling, according to a sludge generation process of a waste acid recycling system, water and chlorine-containing substances in sludge are removed online at low temperature and then sent to an acid recycling process to prepare acid, and the rest substances are directly returned to be used as iron-making raw materials.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: waste acid cyclic regeneration online recovery processing system, including waste acid regeneration system, waste acid regeneration system's drain links to each other with drying system's feed inlet, drying system's discharge gate links to each other with sorting sintering system, drying system's gas outlet with waste acid regeneration system's feed inlet links to each other.
The waste acid regeneration system comprises a precipitation tank, the precipitation tank is connected with an inlet of the roasting furnace through a filter press, and a top air outlet of the roasting furnace is connected with the acid extraction equipment.
And the outlet of the filter press is connected with the feed inlet of the drying system through a conveyor.
And the air outlet of the drying system is connected with the air inlet of the roasting furnace through an air extraction system I.
And an air exhaust port is arranged at the bottom of the roasting furnace and is connected with an air inlet of the drying system through an air exhaust system II.
And the air inlet and the air outlet of the drying system are respectively arranged at two ends of the drying system.
Drying system includes sealed barrel, be provided with breaker in the sealed barrel, breaker includes the rotation axis and the auger blade that sets up on it, in the rotation axis or the surrounding magnetic induction coil that is provided with on the inner wall of sealed barrel.
The sorting sintering system comprises a bin, the bottom of the bin is connected with a sorting machine, and a discharge port of the bin is connected with a sintering machine through a conveyor.
The on-line recycling treatment process for the waste acid recycling regeneration is applied to the on-line recycling treatment system for the waste acid recycling regeneration, and is characterized in that: the method comprises the following steps:
step 1: treating waste acid washing liquor in a waste acid regeneration system to prepare acid;
step 2: crushing and drying sludge discharged by a waste acid regeneration system;
and step 3: recycling chlorine-containing gas generated in the sludge drying process to a waste acid regeneration system for acid regeneration;
and 4, step 4: sorting the dried sludge and sintering to obtain the iron-making raw material.
In the process of drying the sludge discharged by the waste acid regeneration system, the flue gas hot air generated in the acid regeneration system is used for auxiliary drying of the sludge, so that the moisture content in the dried sludge is ensured to be 8% -15%.
The invention has the beneficial effects that:
1. according to the sludge production process, the production process and the treatment process are organically combined for targeted design, the sludge produced by the waste acid regeneration system is directly dried on line at low temperature after being filtered, the gas produced in the drying process is returned to the waste hydrochloric acid regeneration system for acid regeneration and utilization, and the produced solid is used as an iron-making raw material, so that the online treatment of the sludge is realized, the secondary pollution of the links of sludge collection, storage, transportation and the like is avoided, and the full-quantification and resource clean utilization of the sludge is realized.
2. According to the invention, the drying system is used for heating the entering sludge while crushing the entering sludge, and meanwhile, the flue gas hot air from the roasting furnace of the acid regeneration system is used for drying the crushed sludge, so that the moisture content of the dried sludge can be ensured to be 8-15%, and the removal efficiency of moisture in the sludge is improved.
In conclusion, the invention has the advantages of short process flow, advanced technology and low energy consumption, realizes the online disposal of the sludge, avoids the secondary pollution of the sludge collection, storage, transportation and other links, and realizes the full-quantification and resource clean utilization of the sludge.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic structural diagram of an on-line recycling treatment system for waste acid recycling in the present invention;
the labels in the above figures are: 1. the waste acid regeneration system comprises a waste acid regeneration system, 1-1 precipitation tank, 1-2 filter press, 1-3 roasting furnace, 1-4 acid extraction equipment, 2 drying system, 2-1 sealing cylinder, 2-2 crushing device, 3 conveyor, 4 air extraction system I, 5 air extraction system II, 6 stock bin, 7 sorter and 8 sintering machine.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific implementation scheme of the invention is as follows: as shown in figure 1, the waste acid recycling and regenerating on-line recycling and treating system comprises a waste acid regenerating system 1, wherein a drain outlet of the waste acid regenerating system 1 is connected with a feed inlet of a drying system 2, a discharge outlet of the drying system 2 is connected with a sorting and sintering system, and a gas outlet of the drying system 2 is connected with the feed inlet of the waste acid regenerating system 1. According to the sludge production process, the production process and the disposal process are organically combined for targeted design, the sludge produced by the waste acid regeneration system 1 is directly dried on line at low temperature after being filtered, the gas produced in the drying process is returned to the waste hydrochloric acid regeneration system for acid regeneration and utilization, and the produced solid is used as an iron-making raw material, so that the online disposal of the sludge is realized, the secondary pollution of the links of sludge collection, storage, transportation and the like is avoided, and the full-quantification and resource clean utilization of the sludge is realized.
Specifically, the waste acid regeneration system 1 comprises a precipitation tank 1-1 for temporarily storing the waste acid liquid, wherein the precipitation tank 1-1 is used for performing primary filtration after impurities in the waste acid liquid are precipitated; then the supernatant is subjected to secondary filter pressing through a filter press 1-2, the filter press 1-2 can select a drum membrane type plate-and-frame filter press 1-2, solid particles in waste acid are removed through the extrusion pressure of a plate-and-frame and the increased tympanic membrane air pressure, meanwhile, the water content in sludge is also reduced, the moisture in the sludge is reduced from the source, the drying energy is saved, and the treatment cost is reduced; collecting the waste acid solution after secondary filtration, then roasting the waste acid solution in a roasting furnace 1-3 at a high temperature to generate HCL gas, connecting a gas outlet at the top of the roasting furnace 1-3 with an acid extraction device 1-4, extracting the HCL gas through the acid extraction device 1-4, and separating Fe in the HCL gas2O3And particles, wherein the reaction gas is collected and then sprayed and absorbed to form regenerated acid.
The outlet of the filter press 1-2 is connected with the feed inlet of the drying system 2 through the conveyor 3, and the water-containing sludge discharged from the filter press 1-2 is conveyed to the drying system 2 through the conveyor 3 for drying, so that a raw material source is provided for ironmaking. The outlet of the filter press 1-2 can be provided with an inclined closed plate, the sludge after filter pressing falls onto the two closed plates, and the openings of the two closed plates are gradually reduced from top to bottom, so that the sludge is conveniently and intensively put into the conveyor 3. The conveyor 3 is preferably a double-screw conveyor 3, and the sludge can be primarily crushed and dispersed through the conveying of the double-screw conveyor 3, so that the sludge is granular, and the working efficiency of the drying system 2 can be improved. In order to further reduce the water content in the sludge from the source and reduce the energy consumption, a filter press can be connected to the outlet of the filter press 1-2, the supernatant of the connected filter press is introduced into the roasting furnace 1-3 to prepare acid, and the outlet of the filter press is connected with the feed inlet of the drying system 2 through the conveyor 3.
The gas outlet of the drying system 2 is connected with the gas inlet of the roasting furnace 1-3 through the gas extraction system I4, the drying system 2 dries the entering sludge, and chlorine-containing gas generated in the drying process only needs to return to the roasting furnace 1-3 through the gas extraction system I4 to circularly prepare acid, so that the recovery rate of HCL gas is improved.
Wherein the bottom of the roasting furnace 1-3 is provided with an air extraction opening, the air extraction opening is connected with an air inlet of the drying system 2 through an air extraction system II 5, a series of physical and chemical reactions occur in the heating process of the waste acid liquid in the roasting furnace 1-3, the water in the waste acid liquid is evaporated, and FeCl is added2、FeCl3Roasting to generate Fe2O3And HCl vapor, the HCl vapor is distributed at the upper part of the roasting furnace 1-3 due to different densities, and Fe is arranged at the lower part of the roasting furnace 1-32O3Particulate precipitated and suspended Fe2O3The particles, namely the high-temperature flue gas at the lower part of the roasting furnace 1-3 enter the drying system 2 through the air exhaust system II 5 to contact with the water-containing sludge particles in the drying system 2, so that the sludge particles are dried, the water content of the sludge is reduced, and the drying efficiency of the water-containing sludge is improved.
The air inlet and the air outlet of the drying system 2 are respectively arranged at two ends of the drying system 2, so that high-temperature flue gas at the lower part of the roasting furnace 1-3 is in full contact reaction with water-containing sludge particles to generate more chlorine-containing gas, and the chlorine-containing gas enters the roasting furnace 1-3 through the air outlet at the other end of the drying system 2 to continuously react to prepare acid, thereby further improving the yield of acid liquor.
Specifically, the drying system 2 comprises a sealing cylinder 2-1, a crushing device 2-2 is arranged in the sealing cylinder 2-1, the crushing device 2-2 comprises a rotating shaft and an auger blade arranged on the rotating shaft, a motor drives the rotating shaft to rotate so as to drive the auger blade to rotate, entering large sludge can be further crushed, a magnetic induction coil is arranged on the rotating shaft or on the inner wall of the sealing cylinder 2-1 in a surrounding mode, the water-containing sludge is heated while being crushed, and the efficiency of removing water in the sludge can be further improved. The heating device of the drying system 2 can also be arranged inside the rotating shaft, i.e. the rotating shaft is arranged as a hollow shaft, and the heating and drying effects can also be realized by surrounding the magnetic induction coil inside the rotating shaft.
Specifically, wherein the sorting sintering system comprises a stock bin 6, the bottom of the stock bin 6 is connected with a separator 7, the separator 7 is set to be an air draft type separator 7, the dried sludge with corresponding granularity can be selected by controlling the air speed of the separator 7 to enter the stock bin 6, the discharge port of the stock bin 6 is connected with a sintering machine 8 through a conveyor 3, and the dried sludge with proper granularity is transported to the sintering machine 8 to be sintered to obtain the ironmaking raw material. The discharging port of the storage bin 6 adopts a gate valve and a star-shaped ash discharging valve to control discharging, so that the control precision of the discharging amount can be improved, and the influence on the sintering process due to stirring of the components of the dried dust and mud can be reduced.
An online recycling treatment process for waste acid recycling comprises the following steps:
step 1: spent pickle liquor is treated in a spent acid regeneration system 1 for acid production.
Step 2: the method comprises the steps of crushing and drying the sludge discharged by the waste acid regeneration system 1, and in the process of drying the sludge discharged by the waste acid regeneration system 1, carrying out auxiliary drying on the sludge by using flue gas hot air generated in the acid regeneration system, so as to ensure that the moisture content in the dried sludge is 8% -15%.
And step 3: and recycling chlorine-containing gas generated in the sludge drying process to the waste acid regeneration system 1 for acid regeneration.
And 4, step 4: sorting the dried sludge and sintering to obtain the iron-making raw material.
Example (b):
the waste acid recycling and regenerating on-line recycling treatment process comprises the following specific steps:
step 1: spent pickle liquor is treated in a spent acid regeneration system 1 for acid production.
Specifically, firstly, introducing the waste acid solution into a precipitation tank 1-1, performing primary filtration after impurities in the waste acid solution are precipitated by the precipitation tank 1-1, performing secondary filter pressing on the supernatant through a filter press 1-2, increasing the tympanic membrane air pressure (1.0 MPa-2.0 MPa) after the plate-and-frame filter press finishes the set pressure, further reducing the liquid content in the sludge to reduce the water content to 30% -60%, wherein the main chemical components in the sludge after filter pressing are shown in Table 1; then, collecting the waste acid liquor after secondary filtration, and then roasting the waste acid liquor in a roasting furnace 1-3 at a high temperature, wherein the temperature of the high-temperature roasting furnace 1-3 is 550-750 ℃, and HCL gas is generated above the roasting furnace 1-3; finally, extracting HCL gas at the top of the roasting furnace 1-3 through acid extraction equipment 1-4, and separating Fe in the HCL gas2O3And particles, wherein the reaction gas is collected and then sprayed and absorbed to form regenerated acid.
Table 1 spent acid regeneration system 1 sludge main chemical composition, wt%
Step 2: and (3) crushing and drying the sludge discharged by the waste acid regeneration system 1.
Specifically, water-containing sludge generated by filter pressing of the filter press 1-2 is conveyed into the drying system 2 through the conveyor 3, the drying system 2 heats and dries the water-containing sludge while crushing the water-containing sludge, meanwhile, flue gas hot air generated in the acid regeneration system is guided into the drying system 2 through the air extraction system II 5 to be in full contact with the crushed sludge, and the water-containing sludge is dried in an auxiliary drying manner, so that the moisture content in the dried sludge can be ensured to be 8% -15%. The crushing and drying can be carried out simultaneously or independently. When the granularity meets the requirement and the moisture does not meet the requirement, stopping the rotation of the main shaft and only drying; when the moisture content meets the requirement and the granularity does not meet the requirement, only crushing is carried out, and ventilation is not carried out.
And step 3: chlorine-containing gas generated in the sludge drying process is recycled to the waste acid regeneration system 1 through the air extraction system I4 for acid regeneration. The TFe content of the dried sludge solid is 60-65%, the chloride ion content is less than 1%, and Na2O、K2The contents of O, Zn and Pb are less than 0.1 percent.
And 4, step 4: sorting the dried sludge and sintering to obtain the iron-making raw material.
Specifically, the air speed of the separator 7 is controlled to select the dried sludge with corresponding granularity to enter the bin 6, and the discharge port of the bin 6 transports the dried sludge with a certain amount of proper granularity to the sintering machine 8 to sinter to obtain the ironmaking raw material.
In conclusion, the invention has the advantages of short process flow, advanced technology and low energy consumption, realizes the online disposal of the sludge, avoids the secondary pollution of the sludge collection, storage, transportation and other links, and realizes the full-quantification and resource clean utilization of the sludge.
While the foregoing is directed to the principles of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. The utility model provides an online recovery processing system of spent acid circulation regeneration which characterized in that: including spent acid regeneration system, spent acid regeneration system's drain links to each other with drying system's feed inlet, drying system's discharge gate links to each other with sorting sintering system, drying system's gas outlet with spent acid regeneration system's feed inlet links to each other.
2. The spent acid recycling and regenerating online recycling and treating system of claim 1, wherein: the waste acid regeneration system comprises a precipitation tank, the precipitation tank is connected with an inlet of the roasting furnace through a filter press, and a top air outlet of the roasting furnace is connected with the acid extraction equipment.
3. An online spent acid recycling and recycling system according to claim 2, characterized in that: and the outlet of the filter press is connected with the feed inlet of the drying system through a conveyor.
4. An online spent acid recycling and recycling system according to claim 2, characterized in that: and the air outlet of the drying system is connected with the air inlet of the roasting furnace through an air extraction system I.
5. An online spent acid recycling and recycling system according to claim 2, characterized in that: and an air exhaust port is arranged at the bottom of the roasting furnace and is connected with an air inlet of the drying system through an air exhaust system II.
6. An online spent acid recycling and recycling system according to claim 5, characterized in that: and the air inlet and the air outlet of the drying system are respectively arranged at two ends of the drying system.
7. The spent acid recycling and regenerating online recycling and treating system of claim 1, wherein: drying system includes sealed barrel, be provided with breaker in the sealed barrel, breaker includes the rotation axis and the auger blade that sets up on it, in the rotation axis or the surrounding magnetic induction coil that is provided with on the inner wall of sealed barrel.
8. The spent acid recycling and regenerating online recycling and treating system of claim 1, wherein: the sorting sintering system comprises a bin, the bottom of the bin is connected with a sorting machine, and a discharge port of the bin is connected with a sintering machine through a conveyor.
9. An online recycling treatment process for waste acid recycling regeneration, which applies the online recycling treatment system for waste acid recycling regeneration as claimed in any one of claims 1 to 8, and is characterized in that: the method comprises the following steps:
step 1: treating waste acid washing liquor in a waste acid regeneration system to prepare acid;
step 2: crushing and drying sludge discharged by a waste acid regeneration system;
and step 3: recycling chlorine-containing gas generated in the sludge drying process to a waste acid regeneration system for acid regeneration;
and 4, step 4: sorting the dried sludge and sintering to obtain the iron-making raw material.
10. An online recycling process for spent acid recycling according to claim 9, characterized in that: in the process of drying the sludge discharged by the waste acid regeneration system, the flue gas hot air generated in the acid regeneration system is used for auxiliary drying of the sludge, so that the moisture content in the dried sludge is ensured to be 8% -15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443636.XA CN114105426A (en) | 2021-11-30 | 2021-11-30 | Waste acid recycling and regenerating on-line recycling system and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111443636.XA CN114105426A (en) | 2021-11-30 | 2021-11-30 | Waste acid recycling and regenerating on-line recycling system and process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114105426A true CN114105426A (en) | 2022-03-01 |
Family
ID=80368628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111443636.XA Pending CN114105426A (en) | 2021-11-30 | 2021-11-30 | Waste acid recycling and regenerating on-line recycling system and process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114105426A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940573A (en) * | 2022-06-01 | 2022-08-26 | 江苏皕成环保科技有限公司 | Can realize pickling spent acid treatment facility of sludge dewatering |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202064000U (en) * | 2011-04-27 | 2011-12-07 | 临安惠通玻璃钢有限公司 | Waste acid regeneration system |
| WO2014036575A1 (en) * | 2012-09-06 | 2014-03-13 | Astec Engineering Gmbh | Purification and silica removal from used acid pickling baths |
| CN106495231A (en) * | 2016-09-08 | 2017-03-15 | 佛山津西金兰冷轧板有限公司 | A kind of spent acid processes recovery technology |
| CN207877553U (en) * | 2017-12-29 | 2018-09-18 | 山东盛德大业新材料科技有限公司 | A kind of drying unit for cold rolling solid waste sludge |
| CN208055172U (en) * | 2018-03-15 | 2018-11-06 | 江苏天楹环保能源成套设备有限公司 | A kind of sludge and waste acid resource system of wire rope factory generation |
| CN111116010A (en) * | 2020-01-09 | 2020-05-08 | 马鞍山钢铁股份有限公司 | Steel mill sludge treatment system and utilization method |
-
2021
- 2021-11-30 CN CN202111443636.XA patent/CN114105426A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202064000U (en) * | 2011-04-27 | 2011-12-07 | 临安惠通玻璃钢有限公司 | Waste acid regeneration system |
| WO2014036575A1 (en) * | 2012-09-06 | 2014-03-13 | Astec Engineering Gmbh | Purification and silica removal from used acid pickling baths |
| CN106495231A (en) * | 2016-09-08 | 2017-03-15 | 佛山津西金兰冷轧板有限公司 | A kind of spent acid processes recovery technology |
| CN207877553U (en) * | 2017-12-29 | 2018-09-18 | 山东盛德大业新材料科技有限公司 | A kind of drying unit for cold rolling solid waste sludge |
| CN208055172U (en) * | 2018-03-15 | 2018-11-06 | 江苏天楹环保能源成套设备有限公司 | A kind of sludge and waste acid resource system of wire rope factory generation |
| CN111116010A (en) * | 2020-01-09 | 2020-05-08 | 马鞍山钢铁股份有限公司 | Steel mill sludge treatment system and utilization method |
Non-Patent Citations (3)
| Title |
|---|
| 徐向东等: "鞍钢联众不锈钢混酸再生技术改进", 《鞍钢技术》, no. 6, pages 3 - 4 * |
| 徐向东等: "鞍钢联众不锈钢混酸再生技术改进", 鞍钢技术, no. 6, pages 58 * |
| 深圳市下坪固体废弃物填埋场编著: "《环卫机械设备合理选择与经济使用》", 中国建筑工业出版社, pages: 23 - 89 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940573A (en) * | 2022-06-01 | 2022-08-26 | 江苏皕成环保科技有限公司 | Can realize pickling spent acid treatment facility of sludge dewatering |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100480184C (en) | Selective volatilization recovery process for waste zinc-manganese battery | |
| CN106746124A (en) | Garbage flying ash water-washing pre-treatment and cement kiln collaboration disposal of resources system | |
| CN106587478A (en) | Hot-dip galvanizing waste acid resource treatment method | |
| CN113105138B (en) | Treatment method and system for water washing and dechlorination of waste incineration fly ash and evaporation, quality separation and crystallization of water washing liquid | |
| CN104909507B (en) | Contaminated acid concentrating and recycling method | |
| CN206359427U (en) | Garbage flying ash water-washing pre-treatment and cement kiln collaboration disposal of resources system | |
| CN204122439U (en) | For the city garbage burning flying ash resource pretreatment system of cement producting material | |
| CN107990320B (en) | Method and system for cooperatively treating organic waste salt and high-salt organic wastewater by cement kiln | |
| CN113245342A (en) | Resource treatment method and system for salt production by washing waste incineration fly ash based on seed crystal method | |
| CN114105426A (en) | Waste acid recycling and regenerating on-line recycling system and process | |
| CN111346713A (en) | Novel waste lead-acid battery resource regeneration and recovery process | |
| CN108011147B (en) | Waste lead-acid storage battery treatment system, treatment process and application of secondary lead | |
| CN203754551U (en) | Device for recycling and treating waste water produced during preparation of decanedioic acid by utilizing castor oil | |
| CN211111624U (en) | Cement kiln of biological mummification mud deals with system in coordination | |
| CN206188618U (en) | Utilize sludge drying device of low temperature waste heat | |
| CN116283094A (en) | Cooperative treatment method and system for waste incineration fly ash and silicon-rich waste | |
| CN114685020B (en) | Sludge anaerobic digestion combined desiccation carbonization system and method | |
| CN105645405A (en) | System and method for recovering graphite from aluminum electrolysis cell cathode carbon block | |
| CN212450663U (en) | Aluminum ash recovery processing system | |
| CN214289946U (en) | Washing and desalting device for waste incineration fly ash | |
| CN213408706U (en) | Furfuryl alcohol dead catalyst processing apparatus | |
| CN212292842U (en) | Integrated system for directly preparing mercury oxide from mercury-containing organic sludge | |
| CN210420096U (en) | Arsenic alkali residue resource utilization equipment | |
| CN207451895U (en) | Processing system containing miscellaneous sludge | |
| CN206447716U (en) | A kind of galvanizing waste acid resource processing unit |
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 |