CN217393284U - Pretreatment system of electrolytic manganese slag - Google Patents
Pretreatment system of electrolytic manganese slag Download PDFInfo
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- CN217393284U CN217393284U CN202220511629.2U CN202220511629U CN217393284U CN 217393284 U CN217393284 U CN 217393284U CN 202220511629 U CN202220511629 U CN 202220511629U CN 217393284 U CN217393284 U CN 217393284U
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Abstract
The utility model provides a pretreatment system for electrolytic manganese slag, which comprises a washing stirring device, a first filter pressing device, a filtrate recovery tank, a digestion stirring device, a second filter pressing device, a sewage treatment system, a third stirring device, an ammonia gas treatment system and an aging base, wherein the upper ends of the washing stirring device, the digestion stirring device and the third stirring device are connected with the ammonia gas treatment system through gas pipes; the lower end of the washing stirring equipment is connected with first filter pressing equipment through a transmission pipeline, and the first filter pressing equipment is respectively connected to a filtrate recovery tank and digestion stirring equipment through the transmission pipeline; the bottom of the digestion stirring equipment is connected with second filter pressing equipment through a transmission pipeline; and the third stirring equipment is connected with the aging warehouse through a transmission belt. The water content of the electrolytic manganese slag mixed material treated by the system is about 10%, the removal rate of ammonium salt can reach more than 90%, and the material is stacked in an aging warehouse for aging, so that the homogenization of lime and manganese slag is improved, and residual trace ammonia gas can be eliminated.
Description
Technical Field
The utility model relates to an electrolytic manganese sediment resourceful treatment equipment field, in particular to pretreatment systems of electrolytic manganese sediment.
Background
The electrolytic manganese slag is the II-class solid waste in general industrial solid waste, the particles of the electrolytic manganese slag are fine, non-magnetic, non-toxic and insoluble in water, and the particle size of the manganese slag is about 2/3 microns and is less than 100 microns. The manganese slag after filter pressing from an electrolytic plant is in an agglomerated state (the water content is generally 13-16 percent), and the viscosity is high. The sulfate is weakly acidic (pH is generally 4-6), the sulfur content in the electrolytic slag is high, the sulfate exists in various forms, most of the sulfate exists in the form of dihydrate gypsum (about 15-18%), and other soluble sulfates (ammonium sulfate, magnesium sulfate, residual manganese sulfate and the like, about 6-10%) mainly exist. In the aqueous solution, the manganese slag contains high content of ammonia nitrogen, and can emit irritant gas (ammonia gas) when stirred by adding water, and besides, the manganese slag also contains trace heavy metal ions and the like.
For a long time, the main disposal method of manganese slag and other harmful solid wastes in China is safe landfill or stockpiling. Therefore, the hazardous wastes such as manganese slag and the like must be scientifically and safely treated to achieve the purposes of protecting the environment and fully utilizing resources. At present, the manganese slag is mainly treated by harmless treatment of solidification and stabilization and resource utilization at home and abroad. Guangxi is a big province of manganese ore resources, and has more electrolytic manganese enterprises, so that the treatment of the electrolytic manganese slag is urgently needed at present. The resource utilization of the electrolytic manganese slag is beneficial to improving the digestion and absorption of solid wastes and the industrial transformation and upgrading, and has great significance to the environmental safety.
At present, the utilization of the solid waste of the manganese slag mainly lies in that the manganese slag is applied to wall materials and building materials, and because the manganese slag contains certain harmful components such as heavy metal ions, ammonia nitrogen and the like, the manganese slag needs to be subjected to stabilization treatment before application so as to ensure the harmlessness of raw materials.
The utility model discloses to current manganese slag innocent treatment demand, design the pretreatment systems of electrolytic manganese slag.
Disclosure of Invention
In order to overcome the problems of less consumption, insufficient removal of harmful components and the like of the existing electrolytic manganese slag, the utility model provides a pretreatment system of the electrolytic manganese slag.
The utility model discloses an implementation: the device comprises a washing stirring device, a first filter pressing device, a filtrate recovery tank, a digestion stirring device, a second filter pressing device, a sewage treatment system, a third stirring device, an ammonia gas treatment system and an aging base, wherein the upper ends of the washing stirring device, the digestion stirring device and the third stirring device are connected with the ammonia gas treatment system through gas pipes; the lower end of the washing stirring equipment is connected with first filter pressing equipment through a transmission pipeline, and the first filter pressing equipment is respectively connected to a filtrate recovery tank and digestion stirring equipment through the transmission pipeline; the bottom of the digestion stirring equipment is connected with second filter pressing equipment through a transmission pipeline; the second filter pressing equipment is respectively connected with the third stirring equipment and the sewage treatment system through a transmission pipeline; and the third stirring equipment is connected with the aging warehouse through a transmission belt. The system for treating the electrolytic manganese slag comprises the following steps: (1) putting manganese slag filtered by a manganese electrolysis plant into water washing and stirring equipment, adding water for washing, and allowing ammonia gas generated in the washing and stirring process to enter an ammonia gas treatment system through a gas pipe; (2) after washing and stirring are finished, manganese slag and water in the washing and stirring equipment enter first filter pressing equipment through a transmission pipeline for filter pressing, filter liquor enters a filter liquor recovery pool through the transmission pipeline after filter pressing, and filter residues enter digestion and stirring equipment through the transmission pipeline; (3) adding water and lime into a digesting and stirring device, stirring the mixture and filter residues together, and feeding ammonia gas generated in the digesting and stirring process into an ammonia gas treatment system through a gas pipe; (4) the digested and stirred materials enter a second filter pressing device through a transmission pipeline for filter pressing, filter liquor after filter pressing enters a sewage treatment system through the transmission pipeline, and filter residues enter a third stirring device through the transmission pipeline; (5) adding lime and fine sand into the third stirring equipment, stirring with the filter residue, and allowing ammonia gas generated in the stirring process to enter an ammonia gas treatment system through a gas pipe; (6) and after the third stirring equipment finishes stirring, conveying the materials to an aging warehouse through a conveying belt for aging treatment, and obtaining harmless pretreated manganese slag after aging treatment.
Preferably, the washing stirring equipment, the digestion stirring equipment and the third stirring equipment are all closed, so that ammonia gas is prevented from leaking.
Preferably, the negative pressure system is installed on the trachea that ammonia processing system and washing agitated vessel, digestion agitated vessel and third agitated vessel are connected, more is favorable to the ammonia to get into ammonia processing system through the negative pressure.
Preferably, the third stirring device is a horizontal coulter type stirrer, and the horizontal coulter type stirrer can effectively reduce material adhesion devices and improve stirring efficiency.
Preferably, the ammonia gas treatment system comprises a buffer tank, a vacuum unit, an ammonia gas absorption tower, a packed tower, a mother liquor storage tank and an acid washing tower; an air inlet of the buffer tank is respectively connected with the water washing stirring equipment, the digestion stirring equipment and the third stirring equipment through air pipes; the air outlet of the buffer tank is connected with the air inlet of the vacuum unit; a condenser is arranged in the vacuum unit, and an air outlet of the vacuum unit is connected with an air inlet of the ammonia absorption tower; the air outlet of the ammonia absorption tower is connected with the air inlet of the packed tower; and the gas outlet of the packed tower is connected with the gas inlet of the pickling tower, and the liquid outlet of the packed tower is connected with the mother liquor storage tank. And (3) an ammonia gas treatment process: (1) ammonia gas generated in the water washing stirring equipment, the digestion stirring equipment and the third stirring equipment firstly enters a buffer tank, liquid ammonia enters the bottom of the buffer tank under the action of gravity, the ammonia gas enters a vacuum unit through an air outlet of the buffer tank, and a condenser of the vacuum unit can prevent heat release in the ammonia absorption process from reducing the air extraction efficiency; (2) ammonia enters an ammonia absorption tower after passing through a vacuum unit, is subjected to heat release with water, and is condensed; (3) after passing through the ammonia absorption tower, the ammonia enters a packed tower, the absorbed ammonia is converted into ammonia water, the ammonia water enters a mother solution storage tank under the action of gravity, and the unabsorbed ammonia enters an acid washing tower; (4) and ammonia gas entering the acid washing tower is washed by dilute sulfuric acid and then is discharged after reaching the standard.
Preferably, the mother liquor storage tank is connected with an ammonia storage tank, and ammonia escaping from ammonia water in the mother liquor storage tank enters the ammonia storage tank.
Preferably, a one-way air valve is arranged at the joint of the mother liquor storage tank and the ammonia storage tank, and escaped ammonia can only flow into the ammonia storage tank in one way.
The utility model discloses preparation electrolytic manganese sediment pretreatment systems is through washing stirring, digestion stirring and third stirring and twice filter-pressing, remains a large amount of ammonium sulfate and soluble manganese sulfate in the effectual solution electrolytic manganese sediment, and manganese sediment misce bene moisture content after the cubic stirring is about 10%, and the ammonium salt clearance can reach more than 90%, and the ageing storehouse is stacked to the material after the stirring and ages, the homogenization rate of effectual improvement lime and manganese sediment.
Drawings
FIG. 1 is a structural diagram of the pretreatment system for electrolytic manganese slag.
FIG. 2 is a structural diagram of an ammonia gas treatment system in the pretreatment system of the electrolytic manganese slag.
Wherein, 1, washing the stirring equipment; 2. a first filter pressing device; 3. a filtrate recovery tank; 4. a digesting agitation device; 5. a second filter pressing device; 6. a sewage treatment system; 7. a third stirring device; 8. an ammonia gas treatment system; 81. a buffer tank; 82. a vacuum unit; 83. an ammonia gas absorption tower; 84. a packed tower; 85. a mother liquor storage tank; 851. a one-way air valve; 86. an ammonia gas storage tank; 87. an acid washing tower; 9. a negative pressure system; 10. and (5) an aging library.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings 1-2, but it should be understood that the scope of the present invention is not limited by the detailed description.
As shown in fig. 1, the pretreatment system for electrolytic manganese slag comprises a washing stirring device 1, a first filter pressing device 2, a filtrate recovery tank 3, a digestion stirring device 4, a second filter pressing device 5, a sewage treatment system 6, a third stirring device 7, an ammonia gas treatment system 8 and an aging base 10, wherein the upper ends of the washing stirring device 1, the digestion stirring device 4 and the third stirring device 7 are connected with the ammonia gas treatment system 8 through gas pipes; the lower end of the washing and stirring device 1 is connected with a first filter pressing device 2 through a transmission pipeline, and the first filter pressing device 2 is respectively connected with a filtrate recovery tank 3 and a digestion and stirring device 4 through transmission pipelines; the bottom of the digestion stirring device 4 is connected with a second filter pressing device 5 through a transmission pipeline; the second filter pressing equipment 5 is respectively connected with a third stirring device 7 and a sewage treatment system 6 through a transmission pipeline; the third stirring device 7 is connected with the aging tank 10 through a transmission belt. The system for treating the electrolytic manganese slag comprises the following steps: (1) putting manganese slag which is filtered and pressed by an electrolytic manganese factory into a washing and stirring device 1, adding water for washing, and feeding ammonia gas generated in the washing and stirring process into an ammonia gas treatment system 8 through a gas pipe; (2) after the washing and stirring are finished, the manganese slag and water in the washing and stirring device 1 enter a first filter pressing device 2 through a transmission pipeline for filter pressing, filter liquor enters a filtrate recovery pool 3 through the transmission pipeline after filter pressing, and filter residues enter a digestion and stirring device 4 through the transmission pipeline; (3) adding water and lime into the digesting and stirring equipment 4, stirring the mixture and the filter residue, and introducing ammonia gas generated in the digesting and stirring process into an ammonia gas treatment system 8 through a gas pipe; (4) feeding the digested and stirred materials into a second filter pressing device 5 through a transmission pipeline for filter pressing, feeding filter liquor obtained after filter pressing into a sewage treatment system 6 through the transmission pipeline, and feeding filter residues into a third stirring device 7 through the transmission pipeline; (5) adding lime and fine sand into the third stirring equipment 7, stirring with the filter residue, and allowing ammonia gas generated in the stirring process to enter an ammonia gas treatment system 8 through a gas pipe; and (6) after the third stirring equipment 7 finishes stirring, conveying the materials to an aging warehouse 10 through a conveying belt for aging treatment, and obtaining harmless pretreated manganese slag after aging treatment.
Furthermore, the water washing stirring device 1, the digestion stirring device 4 and the third stirring device 7 are all closed, so that ammonia gas leakage is prevented.
Furthermore, the air pipe that ammonia processing system 8 and washing agitated vessel 1, digestion agitated vessel 4 and third agitated vessel 7 are connected is installed negative pressure system 9 on, more is favorable to the ammonia to get into ammonia processing system 8 through the negative pressure.
Furthermore, the third stirring device 7 is a horizontal coulter type stirrer, and the horizontal coulter type stirrer can effectively reduce material adhesion devices and improve the stirring efficiency.
Further, as shown in fig. 2, the ammonia gas treatment system 8 includes a buffer tank 81, a vacuum unit 82, an ammonia gas absorption tower 83, a packed tower 84, a mother liquor storage tank 85 and an acid washing tower 87; an air inlet of the buffer tank 81 is respectively connected with the water washing stirring equipment 1, the digestion stirring equipment 4 and the third stirring equipment 7 through air pipes; an air outlet of the buffer tank 81 is connected with an air inlet of the vacuum unit 82; a condenser is arranged in the vacuum unit 82, and an air outlet of the vacuum unit 82 is connected with an air inlet of the ammonia absorption tower 83; the air outlet of the ammonia absorption tower 83 is connected with the air inlet of the packed tower 84; an air outlet of the packed tower 84 is connected with an air inlet of the pickling tower 87, and an air outlet of the packed tower 84 is connected with a mother liquor storage tank 85. And (3) ammonia gas treatment process: (1) ammonia generated in the water-washing stirring equipment 1, the digestion stirring equipment 4 and the third stirring equipment 7 firstly enters a buffer tank 81, liquid ammonia enters the bottom of the buffer tank 81 under the action of gravity, the ammonia enters a vacuum unit 82 through an air outlet of the buffer tank 81, and a condenser of the vacuum unit 82 can prevent heat release in the ammonia absorption process to reduce the air extraction efficiency; (2) the ammonia enters an ammonia absorption tower 83 after passing through a vacuum unit 82, and is cooled down with water for condensation; (3) after passing through the ammonia absorption tower 83, the ammonia enters the packed tower 84, the absorbed ammonia is converted into ammonia water, the ammonia water enters the mother liquor storage tank 85 under the action of gravity, and the unabsorbed ammonia enters the acid washing tower 87; and (4) washing the ammonia gas entering the acid washing tower 87 by using dilute sulfuric acid, and discharging the ammonia gas after reaching the standard.
Further, an ammonia gas storage tank 86 is connected to the mother liquid storage tank 85, and ammonia gas escaping from the ammonia water in the mother liquid storage tank 85 enters the ammonia gas storage tank 86.
Furthermore, a one-way air valve 851 is arranged at the connection part of the mother liquor storage tank 85 and the ammonia storage tank 86, so that the escaped ammonia can only flow into the ammonia storage tank 86 in one way.
Claims (7)
1. The pretreatment system for the electrolytic manganese slag is characterized by comprising a washing stirring device, a first filter pressing device, a filtrate recovery tank, a digestion stirring device, a second filter pressing device, a sewage treatment system, a third stirring device, an ammonia gas treatment system and an aging base, wherein the upper ends of the washing stirring device, the digestion stirring device and the third stirring device are connected with the ammonia gas treatment system through gas pipes; the lower end of the washing stirring equipment is connected with first filter pressing equipment through a transmission pipeline, and the first filter pressing equipment is respectively connected to a filtrate recovery tank and digestion stirring equipment through the transmission pipeline; the bottom of the digestion stirring equipment is connected with second filter pressing equipment through a transmission pipeline; the second filter pressing equipment is respectively connected with the third stirring equipment and the sewage treatment system through a transmission pipeline; and the third stirring equipment is connected with the aging warehouse through a transmission belt.
2. The pretreatment system for electrolytic manganese slag according to claim 1, wherein the water washing stirring device, the digestion stirring device and the third stirring device are all closed.
3. The pretreatment system of electrolytic manganese slag according to claim 1, wherein a negative pressure system is installed on a gas pipe connecting the ammonia gas treatment system with the water washing stirring device, the digestion stirring device and the third stirring device.
4. The pretreatment system for electrolytic manganese slag according to claim 1, wherein the third stirring device is a horizontal coulter type stirrer.
5. The pretreatment system for electrolytic manganese slag according to claim 1, wherein the ammonia gas treatment system comprises a buffer tank, a vacuum unit, an ammonia gas absorption tower, a packed tower, a mother liquor storage tank and an acid washing tower; an air inlet of the buffer tank is respectively connected with the water washing stirring equipment, the digestion stirring equipment and the third stirring equipment through air pipes; the air outlet of the buffer tank is connected with the air inlet of the vacuum unit; a condenser is arranged in the vacuum unit, and an air outlet of the vacuum unit is connected with an air inlet of the ammonia absorption tower; the air outlet of the ammonia absorption tower is connected with the air inlet of the packed tower; and the gas outlet of the packed tower is connected with the gas inlet of the pickling tower, and the liquid outlet of the packed tower is connected with the mother liquor storage tank.
6. The pretreatment system for electrolytic manganese residues according to claim 5, wherein an ammonia gas storage tank is connected to the mother liquor storage tank.
7. The pretreatment system for electrolytic manganese slag according to claim 5, wherein a one-way gas valve is arranged at the joint of the mother liquor storage tank and the ammonia gas storage tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220511629.2U CN217393284U (en) | 2022-03-10 | 2022-03-10 | Pretreatment system of electrolytic manganese slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220511629.2U CN217393284U (en) | 2022-03-10 | 2022-03-10 | Pretreatment system of electrolytic manganese slag |
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| CN217393284U true CN217393284U (en) | 2022-09-09 |
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| CN202220511629.2U Active CN217393284U (en) | 2022-03-10 | 2022-03-10 | Pretreatment system of electrolytic manganese slag |
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