CN211595332U - System for treating coke oven gas desulfurization and decyanation waste liquid by using waste pickling solution - Google Patents
System for treating coke oven gas desulfurization and decyanation waste liquid by using waste pickling solution Download PDFInfo
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- CN211595332U CN211595332U CN201922041153.1U CN201922041153U CN211595332U CN 211595332 U CN211595332 U CN 211595332U CN 201922041153 U CN201922041153 U CN 201922041153U CN 211595332 U CN211595332 U CN 211595332U
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Abstract
The utility model relates to a system for handle coke oven gas desulfurization decyanation waste liquid with abandonment pickle belongs to industrial waste liquid waste residue comprehensive utilization and chemical production technical field. Comprises a waste acid pretreatment tank, a desulfurization waste liquid storage tank, a reaction tank, a solid-liquid separator, an extraction tower and an extraction liquid regeneration tower; the waste acid pretreatment tank and the desulfurization waste liquid storage tank are respectively connected with the reaction tank through pipelines, the outlet of the reaction tank is connected with the solid-liquid separator through a pipeline, the bottom of the solid-liquid separator is provided with a material outlet which is connected with the extraction tower through a pipeline, and the extraction tower is connected with the extraction liquid regeneration tower through a conveying pipeline. Adopt the utility model discloses usable steel enterprise's discarded acid liquid effectively gets rid of high concentration cyanide and sulphide in the desulfurization decyanation waste liquid, reduces the poison of waste water to biochemical system.
Description
Technical Field
The utility model relates to a system for use abandonment pickle as raw materials processing coke oven gas desulfurization decyanation waste liquid belongs to industrial waste liquid waste residue comprehensive utilization and chemical production technical field.
Background
A process for desulfurizing and decyanating coke oven gas by vacuum potassium carbonate method features that during vacuum desorption, the water vapour in acidic gas is condensed to generate the waste liquid containing high-concentration cyanide and sulfide, which contains potassium cyanide and potassium sulfide.
The patent publications 85100375A and 102267778B both disclose that soluble iron salt is added into waste liquid, sulfide and cyanide are respectively precipitated and then centrifugally separated, and the waste liquid after cyanide and sulfide are removed is discharged into a coking wastewater biochemical treatment system for treatment. The method can effectively remove high-concentration cyanide and sulfide, reduce the toxicity of the wastewater to a biochemical system, and simultaneously recover valuable substance resources in the wastewater; however, the existing desulfurization waste liquid treatment process needs to add soluble iron salt, which inevitably increases the water treatment cost.
Iron and steel enterprises generally treat metal surfaces with acids, thereby producing a large amount of Fe2-And free acid pickling waste, which can cause serious pollution if arbitrarily discharged. Therefore, the Fe in the pickle liquor is studied2+Oxidation to Fe3+Using Fe3+The oxidizing treatment of the coke oven gas desulfurization waste liquid achieves the purpose of treating waste by waste, reduces the discharged pollution and is an effective measure for realizing the comprehensive utilization of waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above problem, provide a system with abandonment pickle liquor processing coke oven gas desulfurization decyanation waste liquid, usable steel enterprise's abandonment acidizing fluid effectively gets rid of high concentration cyanide and sulphide in the desulfurization decyanation waste liquid, reduces the poison of waste water to biochemical system, realizes the recycling of pickling waste liquid when reducing treatment cost.
The utility model discloses the technical scheme who takes as follows:
the system for treating the coke oven gas desulfurization and decyanation waste liquid by using the waste pickling solution comprises a waste acid pretreatment tank, a desulfurization waste liquid storage tank, a reaction tank, a solid-liquid separator, an extraction tower and an extraction liquid regeneration tower; the waste acid pretreatment tank and the desulfurization waste liquid storage tank are respectively connected with the reaction tank through pipelines, the outlet of the reaction tank is connected with the solid-liquid separator through a pipeline, the bottom of the solid-liquid separator is provided with a material outlet which is connected with the extraction tower through a pipeline, and the extraction tower is connected with the extraction liquid regeneration tower through a conveying pipeline.
Foretell system with waste pickle handles coke oven gas desulfurization decyanation waste liquid, it has liquid outlet to open solid-liquid separator bottom to pass through the pipe connection waste water collecting vat, and the extraction tower bottom is opened there is material export and liquid outlet, and the material export passes through the pipe connection solid collecting vat, and the liquid outlet passes through conveying pipeline and is connected with extraction liquid regeneration tower, and extraction liquid regeneration tower bottom opening and solid collecting vat pass through the discharge piping connection, and the top opening passes through the regeneration pipe connection with the extraction tower.
In the system for treating the coke oven gas desulfurization and decyanation waste liquid by using the waste pickling solution, the heating rod is arranged in the waste acid pretreatment tank.
In the system for treating the coke oven gas desulfurization and decyanation waste liquid by using the waste pickling solution, the liquid pumps are respectively arranged on the pipelines between the waste acid pretreatment tank, the desulfurization waste liquid storage tank and the reaction tank, the slurry pumps are respectively arranged on the pipelines between the reaction tank and the solid-liquid separator and between the solid-liquid separator and the extraction tower, and the liquid pumps are respectively arranged on the conveying pipeline between the extraction tower and the extraction liquid regeneration tower and the regeneration pipeline.
The system for treating the coke oven gas desulfurization and decyanation waste liquid by using the waste pickling solution further comprises a stirring device, wherein the stirring device comprises a stirring rod, a motor, a mounting seat and a cooling water pipe, the motor is fixed on the mounting seat, the stirring rod is fixed with a motor shaft of the motor in a coaxial manner, the cooling water pipe is spirally arranged along the circumferential direction of the stirring rod, and two ends of the cooling water pipe penetrate through the mounting seat and are fixed in the mounting seat.
The system for treating the waste liquid generated by desulfurization and decyanation of the coke oven gas by using the waste pickling solution is characterized in that the stirring device further comprises a support, a sliding clamping seat and a telescopic rod, wherein the support comprises a cross beam, the sliding clamping seat is in sliding connection with the cross beam, the top of the mounting seat is fixed with the bottom of the telescopic rod, and the top of the telescopic rod is fixed with the sliding clamping seat.
In the system for treating the waste liquid generated by desulfurization and decyanation of the coke oven gas by using the waste pickling solution, the support further comprises 2 vertical beams, the two ends of each cross beam are fixed with the top ends of the vertical beams, and the vertical distance between the 2 vertical beams is greater than the width of the waste acid pretreatment tank.
The utility model discloses a use method does:
adding a certain amount of waste iron chips and waste acid liquid into a waste acid pretreatment tank, starting a heating rod to heat, crossing a support of a stirring device above the waste acid pretreatment tank to immerse the stirring rod into the waste acid liquid, adjusting the position of the stirring rod through an adjusting sliding clamping seat, starting a motor to start the stirring rod, fully reacting the waste acid liquid and the waste iron chips, closing the heating rod to stop heating, introducing cooling water into a cooling water pipe, performing heat exchange between the cooling water and the high-temperature acid liquid through a cooling water pipe arranged in the circumferential direction of the stirring rod, discharging hot water after the heat exchange through the cooling water pipe, closing the cooling water after the concentrated liquid is cooled to room temperature, and simultaneously closing the stirring device.
Adding the desulfurized waste liquid into a reaction tank through a liquid pump, then adding the pretreated waste acid liquid into the reaction tank, carrying out redox reaction on the two solutions to generate precipitate, conveying the precipitate and the mixed solution into a solid-liquid separator through a slurry pump, discharging the separated waste water into a waste water collecting tank through a liquid outlet at the bottom of the solid-liquid separator, conveying solid sulfide and cyanide into an extraction tower through a pipeline through the slurry pump, wherein the sulfide can be dissolved in an extracting agent, solid cyanide is discharged into the solid collecting tank through a material outlet at the bottom of the extraction tower through a pipeline, the extractant extracts sulfide and then enters the extraction liquid regeneration tower through a liquid pump through a conveying pipeline, the analyzed sulfide is collected into the solid collecting tank through an outlet at the bottom of the extraction liquid regeneration tower through a discharge pipeline, and the regenerated extractant returns to the extraction tower through a regeneration pipeline through the liquid pump for reuse. Thereby completing the removal of fixed cyanides and sulfides in the desulfurization and decyanation waste liquid and reducing the toxicity of the waste water to a biochemical system.
The utility model has the advantages that:
utilize the utility model discloses a waste acid pretreatment tank at first takes place oxidation reaction with the waste acid liquid of iron and steel enterprise and hydrogen peroxide solution strong oxidant, makes the whole oxidations of ferrous ion in the waste acid liquid be ferric ion, then takes place redox reaction with waste acid liquid after the preliminary treatment and desulfurization decyanation waste liquid in the reaction tank to accomplish getting rid of cyanide in the extraction tower, realize getting rid of sulphide in the extraction liquid regeneration tower, realize the reuse of extractant simultaneously.
Utilize the utility model discloses can effectively get rid of cyanide and sulphide in the desulfurization decyanation waste liquid, reduce waste water to biochemical system's toxicity, realize the reuse of steel enterprise's pickling waste liquid simultaneously, stop the outer environmental pollution who causes of arranging of spent acid, reach the purpose of treating waste with useless, need not add any medicine simultaneously, practiced thrift treatment cost by a wide margin.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a waste acid pretreatment tank and a stirring device;
labeled as: the device comprises a waste acid pretreatment tank 1, a desulfurization waste liquid storage tank 2, a reaction tank 3, a solid-liquid separator 4, an extraction tower 5, an extraction liquid regeneration tower 6, a pipeline 7, a conveying pipeline 8, a waste water collection tank 9, a solid collection tank 10, a discharge pipeline 11, a regeneration pipeline 12, a heating rod 13, a liquid pump 14, a slurry pump 15, a stirring rod 16, a motor 17, a mounting seat 18, a cooling water pipe 19, a sliding clamping seat 20, an expansion link 21, a cross beam 22, a vertical beam 23, a waste iron scrap adding port 24, a waste acid conveying pipe 25 and a hydrogen peroxide conveying pipe 26.
Detailed Description
FIG. 1 shows that the utility model relates to a system for treating waste liquid of desulfurization and decyanation of coke oven gas by waste pickle liquor, which comprises a waste acid pretreatment tank 1, a storage tank 2 for desulfurization waste liquid, a reaction tank 3, a solid-liquid separator 4, an extraction tower 5, an extract liquid regeneration tower 6 and a stirring device; the waste acid pretreatment tank 1, the desulfurization waste liquid storage tank 2 and the reaction tank 3 are rectangular tank bodies; the waste acid pretreatment tank 1 and the desulfurization waste liquid storage tank 2 are respectively connected with the reaction tank 3 through pipelines 7, and liquid pumps 14 are respectively arranged on the 2 pipelines 7 and used for pumping waste acid liquid and desulfurization waste liquid into the reaction tank 3; the outlet of the reaction tank 3 is connected with the solid-liquid separator 4 through a pipeline 7, and a slurry pump 15 is arranged on the pipeline 7; the bottom of the solid-liquid separator 4 is provided with a material outlet and a liquid outlet, the material outlet is connected with the extraction tower 5 through a pipeline 7, a slurry pump 15 is arranged on the pipeline 7, and the liquid outlet is connected with a wastewater collection tank 9 through the pipeline 7; the bottom of the extraction tower 5 is provided with a material outlet and a liquid outlet, the material outlet is connected with a solid collecting tank 10 through a pipeline 7, the liquid outlet is connected with an extraction liquid regeneration tower 6 through a conveying pipeline 8, and the conveying pipeline 8 is provided with a liquid pump 14; an opening at the bottom of the extraction liquid regeneration tower 6 is connected with a solid collecting tank 10 through a discharge pipeline 11, an opening at the top is connected with the extraction tower 5 through a regeneration pipeline 12, and a liquid pump 14 is arranged on the regeneration pipeline 12;
fig. 1 and 2 show that 2 heating rods 13 are arranged inside a waste acid pretreatment tank 1;
fig. 2 shows that the stirring device comprises a stirring rod 16, a motor 17, a mounting seat 18, a cooling water pipe 19, a bracket, a sliding clamping seat 20 and an expansion link 21, wherein the motor 17 is fixed on the mounting seat 18, the stirring rod 16 and a motor shaft of the motor 17 are coaxially fixed, the cooling water pipe 19 is spirally arranged along the circumferential direction of the stirring rod 16, and two ends of the cooling water pipe penetrate through the mounting seat 18 and are fixed in the mounting seat 18; the support comprises a cross beam 22 and 2 vertical beams 23, two ends of the cross beam 22 are fixed with the top ends of the vertical beams 23, the sliding clamping seat 20 is connected with the cross beam 22 in a sliding manner, the top of the mounting seat 18 is fixed with the bottom of the telescopic rod 21, and the top of the telescopic rod 21 is fixed with the sliding clamping seat 20; the vertical distance between the 2 vertical beams 23 is larger than the width of the waste acid pretreatment tank 1, so that the support can stretch across the waste acid pretreatment tank 1, and the stirring rod 16 extends into the waste acid pretreatment tank 1 to stir the acid liquor; the sliding clamping seat 20 is used for adjusting the position of the stirring rod 16 in the waste acid pretreatment tank 1 through sliding on the cross beam 22, so that the optimal stirring effect is ensured; the telescopic link 21 is used for realizing the depth adjustment of the stirring rod in the waste acid pretreatment tank 1 and also ensuring the stirring effect.
In the embodiment, the waste acid pretreatment tank 1, the desulfurization waste liquid storage tank 2 and the reaction tank 3 are all made of high-efficiency anticorrosive materials with PE inside outer steel structures;
the solid-liquid separator 4 is a centrifuge special for slurry dehydration and has the model of: LW 550-600;
the extraction tower 5 is a centrifugal separation extractor with the model as follows: CWL-650M;
the extraction liquid regeneration tower 6 is an organic solvent regenerator with the model of: t-80.
Referring to fig. 1 and 2, the using method of the present invention is:
adding a certain amount of waste iron chips into a waste acid pretreatment tank 1 through a waste iron chip adding port 24, adding a waste acid solution into the waste acid pretreatment tank 1 through a waste acid conveying pipe 25, starting a heating rod 13 to start heating, enabling a support of a stirring device to stretch over the waste acid pretreatment tank 1 to enable the stirring rod 16 to be immersed into the waste acid solution, enabling the stirring rod 16 to be at an optimal stirring position by adjusting the position of a sliding clamping seat 20 on a cross beam 22, starting a motor 17 to start the stirring rod 16, enabling the waste acid solution and the waste iron chips to fully react, closing the heating rod 13 to stop heating, introducing cooling water into a cooling water pipe 19, enabling the cooling water to exchange heat with the high-temperature acid solution through a cooling water pipe 19 arranged on the circumference of the stirring rod 16, discharging hot water after heat exchange through the other end of the cooling water pipe 19, closing the cooling water after the concentrated liquid is cooled to room temperature.
The desulfurization waste liquid is pumped into a reaction tank 3 through a liquid pump 14, then pretreated waste acid liquid is added into the reaction tank 3, the two solutions are oxidized and reduced to generate precipitates, the precipitates and the mixed solution are conveyed into a solid-liquid separator 4 through a slurry pump 15, the separated waste water is discharged into a waste water collecting tank 9 through a liquid outlet at the bottom of the solid-liquid separator 4, solid sulfur and cyanide enter an extraction tower through a pipeline 7 through the slurry pump 15, the solid sulfur can be dissolved in an extracting agent, solid cyanide is discharged into a solid collecting tank 10 through a material outlet at the bottom of an extraction tower 5 and a pipeline 7, an extracting agent is used for extracting sulfur and then enters an extraction liquid regeneration tower 6 through a liquid pump 15 and a conveying pipeline 8, the analyzed elemental sulfur is collected into the solid collecting tank 10 through an outlet at the bottom of the extraction liquid regeneration tower 6 and a discharge pipeline 11, the regenerated extractant is returned to the extraction device 5 for reuse through a liquid pump 14 via a regeneration pipe 12. Thereby completing the removal of fixed cyanides and sulfides in the desulfurization and decyanation waste liquid and reducing the toxicity of the waste water to a biochemical system.
Claims (7)
1. The system for treating the coke oven gas desulfurization and decyanation waste liquid by using the waste pickling solution is characterized in that: comprises a waste acid pretreatment tank (1), a desulfurization waste liquid storage tank (2), a reaction tank (3), a solid-liquid separator (4), an extraction tower (5) and an extraction liquid regeneration tower (6); the waste acid pretreatment tank (1) and the desulfurization waste liquid storage tank (2) are respectively connected with the reaction tank (3) through pipelines (7), the outlet of the reaction tank (3) is connected with the solid-liquid separator (4) through a pipeline (7), the bottom of the solid-liquid separator (4) is provided with a material outlet which is connected with the extraction tower (5) through a pipeline (7), and the extraction tower (5) is connected with the extraction liquid regeneration tower (6) through a conveying pipeline (8).
2. The system for treating the desulfurization and decyanation waste liquid of the coke oven gas by the waste pickling solution as claimed in claim 1, wherein: the device is characterized in that a liquid outlet is formed in the bottom of the solid-liquid separator (4) and connected with a wastewater collecting tank (9) through a pipeline (7), a material outlet and a liquid outlet are formed in the bottom of the extraction tower (5), the material outlet is connected with the solid collecting tank (10) through the pipeline (7), the liquid outlet is connected with the extraction liquid regeneration tower (6) through a conveying pipeline (8), an opening in the bottom of the extraction liquid regeneration tower (6) is connected with the solid collecting tank (10) through a discharge pipeline (11), and an opening in the top of the extraction tower (5) is connected with a regeneration pipeline (12).
3. The system for treating the desulfurization and decyanation waste liquid of the coke oven gas by the waste pickling solution as claimed in claim 1, wherein: and a heating rod (13) is arranged in the waste acid pretreatment tank (1).
4. The system for treating the desulfurization and decyanation waste liquid of the coke oven gas by the waste pickling solution as claimed in claim 1, wherein: liquid pumps (14) are respectively installed on pipelines (7) among the waste acid pretreatment tank (1), the desulfurization waste liquid storage tank (2) and the reaction tank (3), mud pumps (15) are respectively installed on the pipelines (7) between the reaction tank (3) and the solid-liquid separator (4) and between the solid-liquid separator (4) and the extraction tower (5), and liquid pumps (14) are respectively installed on conveying pipelines (8) and regeneration pipelines (12) between the extraction tower (5) and the extraction liquid regeneration tower (6).
5. The system for treating the desulfurization and decyanation waste liquid of the coke oven gas by the waste pickling solution as claimed in claim 1, wherein: still include agitating unit, agitating unit includes stirring rod (16), motor (17), mount pad (18) and cooling water pipe (19), and on motor (17) were fixed in mount pad (18), stirring rod (16) and the motor shaft coaxial line of motor (17) were fixed, and cooling water pipe (19) are arranged along the circumference spiral of stirring rod (16), and mount pad (18) are passed and are fixed in mount pad (18) at both ends.
6. The system for treating the desulfurization and decyanation waste liquid of the coke oven gas by the waste pickling solution as claimed in claim 5, wherein: the stirring device further comprises a support, a sliding clamping seat (20) and a telescopic rod (21), wherein the support comprises a cross beam (22), the sliding clamping seat (20) is connected with the cross beam (22) in a sliding mode, the top of the mounting seat (18) is fixed with the bottom of the telescopic rod (21), and the top of the telescopic rod (21) is fixed with the sliding clamping seat (20).
7. The system for treating the desulfurization and decyanation waste liquid of the coke oven gas by the waste pickling solution as claimed in claim 6, wherein: the support still includes 2 and erects roof beam (23), and the both ends of crossbeam (22) are fixed with the top of erecting roof beam (23), and 2 perpendicular distances between erecting roof beam (23) are greater than the width of spent acid pretreatment groove (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922041153.1U CN211595332U (en) | 2019-11-24 | 2019-11-24 | System for treating coke oven gas desulfurization and decyanation waste liquid by using waste pickling solution |
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| CN201922041153.1U CN211595332U (en) | 2019-11-24 | 2019-11-24 | System for treating coke oven gas desulfurization and decyanation waste liquid by using waste pickling solution |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885156A (en) * | 2019-11-24 | 2020-03-17 | 邯郸钢铁集团有限责任公司 | System and method for treating coke oven gas desulfurization and decyanation waste liquid by using waste acid liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885156A (en) * | 2019-11-24 | 2020-03-17 | 邯郸钢铁集团有限责任公司 | System and method for treating coke oven gas desulfurization and decyanation waste liquid by using waste acid liquid |
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