CN217297518U - Utilize equipment and waste acid processing system of sediment powder preparation waste acid treatment agent - Google Patents
Utilize equipment and waste acid processing system of sediment powder preparation waste acid treatment agent Download PDFInfo
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- CN217297518U CN217297518U CN202220481931.8U CN202220481931U CN217297518U CN 217297518 U CN217297518 U CN 217297518U CN 202220481931 U CN202220481931 U CN 202220481931U CN 217297518 U CN217297518 U CN 217297518U
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Abstract
The utility model provides a device for preparing a waste acid treating agent by utilizing slag powder and a waste acid treating system, which comprises a material storage device, a feeding device and a batching device which are arranged from top to bottom in sequence; one end of the discharge pipe is connected with the discharge port, and the other end of the discharge pipe is communicated with the material storage device; one end of the air inlet pipe is connected with air supply equipment, and the other end of the air inlet pipe is communicated with one end of the discharge pipe through a discharge opening; the water supply equipment is connected with the batching device, and the compressed air of the air inlet pipe drives the slag powder to enter the material storage device from the discharge port; the mixed powder in the material storage device is further mixed by the feeding device and then enters the batching device. The aeration device in the waste acid treatment system is arranged at the bottom of the neutralization oxidation pond, and the neutralization oxidation pond receives the waste acid treatment agent from the batching device. The system adopting the equipment reduces the cost of the waste acid treatment process and reduces the environmental pollution.
Description
Technical Field
The utility model belongs to the technical field of environmental engineering, a equipment of preparation waste acid treatment agent is related to, especially relate to an utilize slag powder to make equipment of waste acid treatment agent and contain the waste acid processing system of this equipment.
Background
The waste acid treatment is a key link in the solid solution pickling process, slaked lime is generally used for waste acid neutralization in the waste acid treatment process, the conventional waste acid treatment technology is mainly an acidic wastewater neutralization oxidation treatment process, and the method comprises the following specific steps: acidic waste water discharged by each production line is distributed by an acidic waste water distribution tank to enter an acidic waste water regulating tank, the regulated waste water is lifted to a primary neutralization tank by a pump, blast aeration is carried out in the primary neutralization tank to oxidize ferrous ions in the waste water into ferric ions, and lime milk (mainly containing calcium hydroxide) is added in the primary neutralization tank, so that the acidity of the waste water can be neutralized, and fluorine ions in the waste water can be removed to form calcium fluoride to be precipitated. The wastewater flowing out after the first-stage neutralization treatment flows into a second-stage neutralization tank automatically, the second-stage neutralization tank is aerated while calcium hydroxide is added, and the wastewater is further neutralized to lead Fe 3+ 、Cr 3+ 、Ni 2+ 、Mo 2+ 、Zn 2+ Respectively form Fe (OH) 3 、Cr(OH) 3 、Ni(OH) 2 、Mo(OH) 2 、Zn(OH) 2 And (3) precipitating, and then adding coagulant aids and flocculating agents into the effluent of the neutralization tank to aggregate precipitates to form larger alum flocs, and then filtering the precipitates by a filter press to form a mud cake for removing.
The chemical reaction formula of the neutralization and oxidation process is as follows (the arrangement sequence is not related to the sequence of the chemical reactions):
H + +OH － →H 2 O
Ca(OH) 2 +2HF→CaF 2 ↓+2H 2 O
Fe 2+ +2OH － →Fe(OH) 2 ↓
Cr 3+ +3OH － →Cr(OH) 3 ↓
Zn 2+ +2OH － →Zn(OH) 2 ↓
Ni 2+ +2OH － →Ni(OH) 2 ↓
Mo 2+ +2OH － →Mo(OH) 2 ↓
2Fe(OH) 2 +O 2 +H 2 O→2Fe(OH) 3 ↓
SO 4 2- +Ca 2+ →CaSO 4 ↓ (slightly soluble)
Therefore, the lime milk (calcium hydroxide) plays an important role in the treatment process of the acidic wastewater. Since the lime milk is prepared by adding water into slaked lime powder, a large amount of slaked lime needs to be consumed, which causes great pollution control cost for enterprises.
Therefore, the reduction of the cost of the waste acid treatment process by seeking a substitute for hydrated lime becomes a key element faced by any manufacturing enterprise.
SUMMERY OF THE UTILITY MODEL
In order to reduce the cost of waste acid treatment process, adopt the slag powder to carry out partial replacement hydrated lime, because the slag powder price is very cheap, therefore can realize reducing by a wide margin of waste acid treatment cost, realize the secondary comprehensive utilization of slag powder simultaneously, reduce the pollution index, the utility model discloses a slag powder calcium oxide content is more than 25 wt%, can be the slag that produces in the blast furnace ironmaking process, also can be the slag that produces in other steelmaking procedures. The utility model aims at providing an utilize equipment of slag powder preparation waste acid treatment agent, this equipment can adopt slag powder and hydrated lime as the raw materials according to the proportion and prepare waste acid treatment agent, and the waste acid treatment agent that obtains is even, and solid impurity is few.
In order to realize the purpose, the utility model adopts the following technical scheme: an apparatus for preparing a waste acid treating agent using slag powder includes: the device comprises a material storage device, a feeding device, a batching device, a discharge pipe, a discharge port, an air inlet pipe and water supply equipment, wherein the material storage device, the feeding device and the batching device are sequentially arranged from top to bottom; one end of the discharge pipe is connected with the discharge port, and the other end of the discharge pipe is communicated with the material storage device; one end of the air inlet pipe is connected with air supply equipment, and the other end of the air inlet pipe is communicated with one end of the discharge pipe through a discharge port; the water supply equipment is connected with the batching device, and the compressed air of the air inlet pipe drives the slag powder to enter from the discharge port and enter the material storage device through the discharge pipe; the material storage device is used for storing and primarily mixing the raw material slag powder and the hydrated lime, and the mixed powder in the material storage device is further mixed by the feeding device and then enters the batching device.
Preferably, the stocker includes: an air inlet, an air outlet and a material storage port; air inlet, gas outlet, storage mouth set up the top at the dust removal stocker, and the intake pipe includes: a first air inlet pipe and a second air inlet pipe; one end of the first air inlet pipe and one end of the second air inlet pipe are communicated with air supply equipment through electromagnetic valves; the other end of the second air inlet pipe is communicated with the air inlet; the other end of the first air inlet pipe is communicated with one end of the discharge pipe through a discharge opening; the other end of the discharge pipe (13) is communicated with the material storage opening (12).
Preferably, the hopper further comprises: the device comprises a storage bin, a conical hopper, a discharge port and a discharge valve, wherein the conical hopper is arranged in a large-upper mode and a small-lower mode, the storage bin, the conical hopper and the discharge port are sequentially communicated from top to bottom, and the discharge valve is arranged at the bottom of the discharge port; the air inlet, the air outlet and the storage port extend outwards from the top of the storage bin.
Preferably, the hopper further comprises: a blanking vibration device and a dust remover; the unloading oscillation device sets up on the outer wall of awl fill, and the dust remover is the storehouse top dust remover, sets up in the feed bin.
Preferably, the equipment further comprises a deslagging device, wherein a slag receiving port of the deslagging device is arranged inside the batching device, and a slag outlet of the deslagging device is arranged outside the batching device; the dosing unit comprises: agitating unit, batching cauldron and lime breast export, the lime breast export sets up on the lateral wall of batching cauldron, and agitating unit sets up in the centre of batching cauldron.
Preferably, a water inlet valve is arranged on a water inlet pipe for connecting the water supply equipment and the batching device, a slag receiving port of the deslagging device is arranged in the batching kettle, a slag outlet of the deslagging device is arranged outside the batching kettle, and the slag outlet of the deslagging device is arranged in a reverse direction to the lime milk outlet.
Preferably, the batching kettle is in a conical hopper shape with a big top end opening and a small bottom end opening, and the feeding device is a spiral feeding device; the deslagging device is a scraper conveyor.
Preferably, the discharge port is connected with the feed port of the feeding device through a discharge valve; the feeding device is horizontally arranged above the batching device.
Preferably, the feed bin is hollow cylinder, and the awl fill is the cone, and hollow cylinder, cone and drain hole seamless intercommunication, solenoid valve are the tee bend solenoid valve.
Preferably, a waste acid treatment system of a plant for manufacturing a waste acid treatment agent by using the slag powder, the waste acid treatment system further comprises: the aeration device is arranged at the bottom of the neutralization oxidation tank; the neutralization oxidation pond is connected with the batching device to receive the waste acid treating agent from the batching device.
Compared with the prior art, the utility model discloses a beneficial technological effect as follows:
1. in the utility model, slag powder and hydrated lime powder are put into operation according to the mass ratio of 1:3, and every 10 tons of slag powder can replace 2.5 tons of hydrated lime powder, thereby greatly reducing the cost of the waste acid treatment process and reducing the pollution index due to the secondary utilization of the slag powder.
2. The utility model discloses in, through the compressed air that sets up at the feed bin top, when carrying the ground slag entering feed bin, use pipeline to connect compressed air pipe, under compressed air's helping hand, carry the ground slag inside the feed bin, solved because of the ground slag mesh number is less than the problem that the ground lime and molar mass are big than the ground lime hydrate and are difficult to carry the entering feed bin.
3. The utility model discloses in, totally closed uninstallation, mixed powder adopt the air current to mix when mixing the powder and mix with the feed, make slag powder and hydrated lime powder mix more evenly.
4. The utility model discloses, the compressed air of slag powder is carried to the helping hand, the compressed air who is used for mixxing the mixture discharges into the atmosphere after removing dust, reduces the pollution of dust to the environment.
5. The utility model discloses, detach the sediment that forms in the slag powder, the hydrated lime powder and the water mixing process through the slagging-off machine, guaranteed that the slag powder is as the normal operating of treating agent in the neutralization oxidation treatment system, avoid impurity jam pipeline and neutralization oxidation pond that exists in the slag powder.
Drawings
Fig. 1 is a schematic view of the structure of the device of the present invention.
In the figure, 1, a stocker; 2. a feeding device; 3. a batching kettle; 4. a deslagging device; 5. a discharge valve; 6. a water inlet valve; 7. a stirring device; 8. a blanking oscillating device; 9. an electromagnetic valve; 10. an air outlet; 11. an air inlet; 12. a material storage port; 13. a discharge pipe; 14. a first intake pipe; 15. a second intake pipe; 16. a water inlet pipe; 17. a discharge opening; 18. a lime milk outlet; 19. a neutralization oxidation pond; 20. an aeration device; a1, gas supply equipment; b1, water supply equipment.
Detailed Description
In the description of the present invention, the directions or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. are the directions or positional relationships shown on the basis of the drawings, and are only for convenience of description of the present invention, but not for the purpose of requiring the present invention to be constructed and operated in a specific direction, and therefore, should not be construed as limiting the present invention. The terms "communicate", "connect" and "set" used in the present invention should be understood in a broad sense, for example, they may be fixed connections or detachable connections; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will now be described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic structural diagrams, and only the basic structure of the present invention is schematically illustrated, so that it only shows the components related to the present invention.
As shown in figure 1, the utility model provides a device for preparing a waste acid treating agent by utilizing slag powder, which comprises a material storage device 1, a feeding device 2 and a batching device. The stocker 1 is used for storing and preliminarily mixing slag powder and hydrated lime powder for preparing the waste acid treatment agent, and the slag powder and the hydrated lime powder in the stocker 1 are stored according to a mass ratio of 1:3 because about 2.5 tons of hydrated lime powder can be replaced per 10 tons of slag powder; the feeding device 2 is used for further mixing the slag powder and the hydrated lime powder in a mass ratio of 1:3 to obtain a mixture of the slag powder and the hydrated lime powder; and the batching device is used for stirring and mixing the mixture of the slag powder and the hydrated lime powder with the mass ratio of 1:3 with water, and uniformly mixing to obtain the waste acid treating agent (lime milk). The equipment comprises a storage device 1 for storing, a mixed feeding device 2 and a mixing device 3 configured by stirring, wherein the storage device, the mixed feeding device and the mixing device are sequentially arranged from top to bottom according to the steps of storage, mixing and stirring for preparing the waste acid treating agent, so that the ingredients (slag powder and hydrated lime powder in a ratio of 1: 3) stored in the storage device 1 are mixed again through the feeding device 2 and then enter the mixing device to be uniformly stirred with water to obtain the waste acid treating agent (lime milk).
The apparatus further comprises: discharge tube 13, discharge opening 17 and air inlet pipe. Seamless connection can be dismantled with discharge opening 17 to the one end of discharge tube 13, and the other end communicates with the top of hopper 1, and discharge opening 17 and the ash outlet detachable seamless connection of dummy car for slaked lime or slag powder in the dummy car need not empty the uninstallation, through discharge tube 13 direct access hopper 1, whole unloading process is whole airtight, very big reduction slaked lime or slag powder pollution and the waste of environment at the uninstallation in-process. Because the slag powder mesh number is less than hydrated lime powder a little, and molar mass ratio hydrated lime powder is big, so the slag powder needs the helping hand from up when uninstalling down, the utility model discloses the compressed air (mill compressed air) that uninstallation slag powder adopted air feeder A1 to produce is as the helping hand, and the intake pipe is used for carrying the compressed air that uninstallation slag powder was used, and air feeder A1 is connected to its one end, and the other end passes through discharge opening 17 and discharge tube 13 and intercommunication, can select whether to open air feeder A1 as required when uninstallation hydrated lime, and must open air feeder A1 during the uninstallation slag powder, makes compressed air get into discharge opening 17 through the intake pipe, drives the slag powder and gets into in hopper 1 through discharge tube 13 together. The waste acid treatment agent (lime milk) obtained by stirring and mixing the slag powder and the hydrated lime powder in a mass ratio of 1:3 needs water, so the equipment further comprises a water supply device B1, a water outlet of the water supply device B1 needs to be communicated with the batching device 3, and when a waste acid treatment base needs to be prepared, the water supply device B1 supplies water to the batching device 3.
Further, the device also uses compressed air to preliminarily mix the slag powder and the hydrated lime powder in the material storage device 1 according to the mass ratio of 1:3, the air inlet pipe is divided into a first air inlet pipe 14 and a second air inlet pipe 15, the first air inlet pipe 14 is used for conveying the compressed air required by unloading the slag powder or the hydrated lime, the second air inlet pipe 15 is used for conveying the compressed air for preliminarily mixing the slag powder and the hydrated lime powder in the material storage device 1, one end of the first air inlet pipe 14 and one end of the second air inlet pipe 15 are communicated with an air supply device A1 through an electromagnetic valve 9, and the electromagnetic valve 9 is a three-way electromagnetic valve. After the slaked lime and the slag powder are discharged, the solenoid valve 9 simultaneously opens the port of the second air inlet pipe 15 communicating with the air supply device a1, and the slaked lime and the slag powder therein are primarily mixed by the air flow entering the storage hopper 1.
The concrete structure is that the top of the stocker 1 is also provided with an air inlet 11, an air outlet 10 and a material storage port 12, the other end of a second air inlet pipe 15 is communicated with the air inlet 11, and compressed air conveyed by the second air inlet pipe 15 enters the stocker 1 through the air inlet 11 and is used for primarily mixing slag powder and slaked lime powder; because the distance from the discharge port 17 to the storage port 12 is 20m-22.5m, the other end of the first air inlet pipe 14 is communicated with one end of the discharge pipe 13 at the discharge port 17 through the discharge port 17, the other end of the discharge pipe 13 is communicated with the storage port 12, and compressed air conveyed by the first air inlet pipe 14 is used as the assistance force for unloading slag powder or slaked lime and enters the storage device 1 at the discharge port 17 together with the slag powder or the slaked lime sequentially through the discharge pipe 13 and the storage port 12. The compressed air in the storage container 1 after the slag powder or the hydrated lime is fed and the compressed air after the powder is mixed is dedusted by a deduster arranged at the top of the storage container 1, and then discharged from an air outlet 10 at the top of the storage container 1, and the gas discharged from the air outlet can be reused by an air supply device A1.
Furthermore, the stocker 1 is composed of an upper part, a middle part and a lower part, wherein the upper part is a storage bin, the middle part is a cone hopper, and the lower part is a discharge port and a discharge valve 5. The storage bin is a vertical hollow cylinder for storing powder, and the volume of the storage bin is 80m 3 -120m 3 The air inlet 11, the air outlet 10 and the material storage port 12 are arranged at the top of the storage bin and extend outwards from the top of the storage bin; the cone hopper is used as a discharge channel of powder and is a truncated cone with a large upper part and a small lower part, the taper of the cone is directly related to the smooth degree of discharging, the horizontal included angle of the general cone hopper is more than 50 degrees, otherwise the cone hopper is easy to hold up materials. The materials with higher humidity, such as powder ore, concentrate, slaked lime, fuel and the like, are stored, and a conical metal structure ore bin with an inclination angle of 70 degrees is adopted, because the utility model is used for storing drier materials, such as hydrated lime powder, slag powder and the like, a conical hopper with a groove angle of not less than 60 degrees and a conical metal structure or a semi-metal structure can be adopted; the diameter of feed bin equals with the top surface diameter of awl fill, and the bottom surface diameter of awl fill equals with the diameter of drain hole, and feed bin, awl fill and drain hole seamless intercommunication from top to bottom in proper order, and baiting valve 5 sets up the bottom at the drain hole. The main structure of the stocker 1 is generally constructed of reinforced concrete or steel silo (generally, steel plate with a thickness of 10mm is used), and steel plate, cast stone or other wear-resistant lining plate capable of reducing frictional resistance is lined on the inner wall of the silo.
Further, the stocker 1 further comprises a discharging vibration device 8 and a dust remover, wherein the discharging vibration device 8 is arranged on the outer wall of the conical hopper (specifically arranged at the middle lower part of the conical hopper), and as the mesh number of the slag powder is smaller and the particles are large, blockage is easily caused in the discharging and discharging process, and the discharging vibration device 8 is used for mixing and vibrating the slag powder and the hydrated lime powder in the storage bin to promote smooth discharging; the dust remover is a bin top dust remover, is arranged in the bin and is used for removing dust from the compressed air after conveying the slag powder in the material storage device 1 and the compressed air after primarily mixing the hydrated lime and the slag powder.
Further, the dosing unit comprises: the stirring device 7, the batching kettle 3 and the lime milk outlet 18; utilize the equipment of sediment powder preparation waste acid treatment agent still to include dross removal mechanism 4, dross removal mechanism 4 connect the sediment mouth to set up in proportioning device's inside promptly batching cauldron 3's inside, dross removal mechanism 4's slag notch sets up in proportioning device's outside promptly batching cauldron 3's outside, and agitating unit 7 sets up in the centre of batching cauldron 3, and lime milk export 18 sets up on batching cauldron 3's lateral wall, and the proportion is 1 in the batching cauldron 3: 3, stirring and mixing the slag powder, the hydrated lime powder and water by a stirring device 7 in the middle of the batching kettle 3 to form the waste acid treating agent (lime milk), wherein residues such as sediment and the like exist in the preparation of the waste acid treating agent due to complex slag powder components, and then a slag remover is used for removing the residues in the lime milk. The waste acid treatment agent (lime milk) stirred and mixed in the batching kettle 3 is discharged through a lime milk outlet 18 on the side wall of the batching kettle 3. The slag removing device 4 used by the utility model can be a scraper conveyor or a spiral slag extractor.
Since the mixed powder (1:3 slag powder and hydrated lime powder) for forming lime milk in the batching kettle 3 and water are prepared in proportion, the input or output of water can be controlled at the beginning or the end of stirring, the water supply device B1 is divided into a water inlet pipe 16 and a water inlet valve 6 arranged on the water inlet pipe, the water inlet valve 6 is used for controlling the opening or closing of the water inlet pipe 16 to convey water into the batching kettle 3, the water inlet valve 6 is arranged outside the batching kettle 3, the water outlet of the water inlet pipe 16 is arranged at the top of the batching kettle 3 and is not contacted with the mixed powder and is arranged at the same side with the lime milk outlet 18, and the slag outlet of the deslagging device 4 is arranged in a reverse direction with the water inlet of the water inlet pipe 16 and the lime milk outlet 18.
Further, the batching kettle 3 is in a cone hopper shape (conical shape or pyramidal shape) with a big top and a small bottom, and the feeding device 2 is a spiral feeding device. The spiral feeding device is specially used for metering and controlling powdery materials, has a unique steady flow structure, uniformly sinks powder on the cross section of the whole feeding hole, is not easy to form arch, is not easy to flush, has a sealing structure, and reduces dust from rising outwards. The feeding device 2 is horizontally arranged above the batching device 3, mixed powder enters the batching kettle 3 through a discharge hole of the feeding device 2, a feed inlet of the feeding device 2 is connected with a discharge hole of the material storage device 1 through a discharge valve 5, and the discharge valve 5 controls the material storage device 1 to feed the powder to the feeding device 2.
The utility model also provides a waste acid processing system, waste acid processing system contain the above-mentioned equipment that utilizes the sediment powder to make waste acid treatment agent, still include: a neutralization oxidation pond 19, an aeration device 20 and an intelligent control device. The acidic waste water is aerated and accelerated to oxidize in the neutralization oxidation tank 19 by the aeration device 20, and simultaneously the waste acid treatment agent (lime milk) prepared in the material preparation kettle 3 is conveyed to the neutralization oxidation tank 19 through the lime milk outlet 18 to continue aeration and oxidation, so that most ferrous ions in the acidic waste water are oxidized into ferric ions, and when the pH value of the acidic waste water is 5-6, the fluoride ions in the waste water and the lime milk form calcium fluoride to precipitate. The intelligent control device comprises a material level meter (an intelligent patch material level meter) arranged in a storage bin of the material storage device 1, an intelligent alarm arranged outside the equipment, an intelligent control switch, wherein the intelligent alarm and the intelligent control switch are integrated into a whole, the intelligent control switch limits parameters according to setting, and the intelligent control device receives alarm prompt of the intelligent alarm by remote control, wireless remote control, a manual control electromagnetic valve 9, a discharge valve 5, a water inlet valve 6, a discharging oscillating device 8, a spiral feeding device 2, a stirring device 7 and at least one of opening and closing of a deslagging device 4.
To further effectively illustrate the feasibility of the embodiments of the present invention, those skilled in the art can quickly master the structure and installation of the embodiments of the present invention, and the present invention is further illustrated by the embodiments. TABLE 1 slaked lime and slag Ca (OH) 2 Content comparison table:
TABLE 1
The volume of the storage bin of the embodiment is 100m 3 The first air inlet pipe 14 is about 22.5m long, intelligent material level management is adopted for raw material storage, and an intelligent patch type material level meter is further arranged in a storage bin of the stocker 1. The intelligent control switch controls the opening or closing of the electromagnetic valve 9, the discharge valve 5, the water inlet valve 6, the blanking vibration device 8, the spiral feeding device 2, the stirring device 7 and the deslagging device 4.
(1) Raw material storage:
the tank car transports the powder to the discharge opening 17, and the discharge opening of the tank car is seamlessly communicated with the discharge opening 17;
when the hydrated lime is conveyed, firstly, a bin top dust remover at the top of the bin is opened, and after the electromagnetic valve 9 is controlled to open a port communicated with a first air inlet pipe 14 and an air supply device A1, a compressed air supply device is opened, the hydrated lime powder in the tank car enters the bin through a discharge port 17, a discharge pipe 13 and a storage port 12 in sequence;
when conveying slag powder, firstly opening the bin top dust remover at the top of the bin, simultaneously opening the port of the first air inlet pipe 14 communicated with the air supply device A1 by the control electromagnetic valve 9, opening the compressed air supply device, and enabling the slag powder in the tank car to sequentially enter the bin through the discharge opening 17, the discharge pipe 13 and the storage opening 12 by the aid of compressed air conveyed by the first air inlet pipe 14 as the assistance for conveying the slag powder.
The conveyed slag powder and hydrated lime are stored in a stocker 1 in a mass ratio of 1: 3. After the raw materials are conveyed, the port of the second air inlet pipe 15 communicated with the air supply device A1 is opened, and compressed air conveyed by the second air inlet pipe 15 enters from the air inlet 11, so that 1:3 slag powder stored in the stocker 1 and hydrated lime are primarily stirred and mixed by airflow. Meanwhile, a bin top dust remover in the material storage device 1 removes dust of compressed air after boosting conveying of slag powder and compressed air after stirring and mixing, and the air after dust removal is discharged from an air outlet 10. Alternatively, the compressed air for transporting the raw material may be discharged from the storage container 1 in time by opening the air outlet 10 after or simultaneously with the transportation of the slag powder and the hydrated lime in accordance with the air pressure requirement in the storage container 1.
(2) Preparation of waste acid treating agent
When the waste acid treating agent (lime milk) needs to be prepared, a discharging vibration device 8, a discharging valve 5 and a spiral feeding device 2 are sequentially opened, slag powder and hydrated lime powder in a mass ratio of 1:3 are further mixed, after the further mixing, the mixture of the slag powder and the hydrated lime powder enters a batching kettle 3, a water inlet valve 6 is opened, a stirring device 7 is opened at the same time, the mixture of the hydrated lime powder and the slag powder is uniformly mixed with water under the stirring condition, and a sediment formed in the mixing process is removed through a deslagging device 4 (a deslagging machine), so that the required waste acid treating agent (lime milk) is finally formed.
(3) Primary neutralization oxidation reaction
Distributing the acidic wastewater discharged by each production line into an acidic wastewater adjusting tank; the effluent of the adjusting tank is pumped to the neutralizing oxidation tank 19 (first), where the main component of the acidic wastewater is H 2 O、HNO 3 、H 2 SO 4 、HF、Fe 2+ 、Fe 3+ 、Gr 3+ 、Ni 2+ 、Mn 2+ 、Zn 2+ Etc. of pH thereof<2. Simultaneously, an aeration device 20 is opened (blast aeration), so that blast aeration is carried out on the acidic wastewater in a neutralization oxidation tank 19, a lime milk outlet 18 is opened, a prepared waste acid treating agent is added, and most ferrous ions in the wastewater are oxidized into ferric ions through the blast aeration treatment; when the pH of the wastewater is 5-6, fluoride ions in the wastewater precipitate by forming calcium fluoride.
(4) Secondary neutralization oxidation reaction
The wastewater flowing out of the first neutralization oxidation tank 19 automatically flows to a second neutralization oxidation tank 19 (second tank), the pH value of the wastewater is 5-6, a lime milk outlet 18 is opened, the prepared waste acid treating agent is added into the second neutralization oxidation tank 19, and the wastewater is subjected to blast aeration treatment, the pH value of the wastewater is 7.5-9, and the wastewater is discharged into a clarification tank for subsequent retreatment.
Residual Fe in the wastewater is treated by an aeration process 2+ Is converted into Fe 3+ Thereby forming Fe (OH) which can precipitate 3 Metal ion Cr in waste water 3+ 、Ni 2+ 、Mo 2+ 、Zn 2+ Respectively form Cr (OH) 3 、Ni(OH) 2 、Mo(OH) 2 、Zn(OH) 2 And precipitating, and then adding coagulant aid and flocculating agent into the second neutralization oxidation pond 19 to aggregate the precipitate to form larger alum floc precipitate, and then filtering the precipitate by a filter press to form a mud cake for removal.
The embodiment adopts the waste acid treating agent prepared by the equipment of the utility model, slag powder and hydrated lime powder are put into operation according to the proportion of 1:3, 2.5 tons of hydrated lime powder can be replaced by 10 tons of slag powder, the cost of the waste acid treatment process is greatly reduced, the environmental pollution is reduced, and the environment is protected.
It will be appreciated by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. An equipment for preparing a waste acid treating agent by utilizing slag powder is characterized in that,
the method comprises the following steps: a material storage device (1), a material feeding device (2), a material distribution device, a discharge pipe (13), a discharge opening (17), an air inlet pipe and water supply equipment (B1),
the material storage device (1), the feeding device (2) and the batching device are sequentially arranged from top to bottom;
one end of the discharge pipe (13) is connected with the discharge opening (17), and the other end of the discharge pipe is communicated with the stocker (1);
one end of the air inlet pipe is connected with air supply equipment (A1), and the other end of the air inlet pipe is communicated with one end of the discharge pipe (13) through the discharge opening (17);
the water supply device (B1) is connected with the batching device,
the compressed air of the air inlet pipe drives slag powder to enter from the discharge opening (17) and enter the material storage device (1) through the discharge pipe (13);
the material storage device (1) is used for storing and primarily mixing raw slag powder and hydrated lime, and the mixed powder in the material storage device (1) is further mixed by the feeding device (2) and then enters the batching device.
2. The apparatus for producing a waste acid treating agent using slag powder according to claim 1,
the hopper (1) comprises: an air inlet (11), an air outlet (10) and a material storage port (12);
the air inlet (11), the air outlet (10) and the material storage port (12) are arranged at the top of the stocker (1),
the intake pipe includes: a first air inlet pipe (14) and a second air inlet pipe (15);
one end of the first air inlet pipe (14) and one end of the second air inlet pipe (15) are communicated with the air supply equipment (A1) through an electromagnetic valve (9);
the other end of the second air inlet pipe (15) is communicated with the air inlet (11);
the other end of the first air inlet pipe (14) is communicated with one end of the discharge pipe (13) through the discharge opening (17);
the other end of the discharge pipe (13) is communicated with the material storage opening (12).
3. The apparatus for producing a waste acid treating agent using slag powder according to claim 2,
the hopper (1) further comprises: a storage bin, a conical hopper, a discharge port and a discharge valve (5),
the conical hopper is arranged in a large-sized manner and a small-sized manner, the stock bin, the conical hopper and the discharge port are communicated in sequence from top to bottom,
the discharge valve (5) is arranged at the bottom of the discharge port;
the air inlet (11), the air outlet (10) and the material storage opening (12) extend outwards from the top of the storage bin.
4. The apparatus for manufacturing a waste acid treating agent using slag powder according to claim 3, wherein the storage hopper (1) further comprises: a blanking vibration device (8) and a dust remover;
the blanking vibration device (8) is arranged on the outer wall of the conical hopper,
the dust remover is a bin top dust remover and is arranged in the bin.
5. The apparatus for producing a waste acid treating agent using slag powder according to claim 4,
the equipment also comprises a deslagging device (4), wherein a slag receiving port of the deslagging device is arranged inside the batching device, and a slag outlet of the deslagging device is arranged outside the batching device;
the dosing unit comprises: a stirring device (7), a batching kettle (3) and a lime milk outlet (18),
the lime milk outlet (18) is arranged on the side wall of the batching kettle (3), and the stirring device (7) is arranged in the middle of the batching kettle (3).
6. The apparatus for producing a waste acid treating agent using slag powder according to claim 5,
a water inlet valve (6) is arranged on a water inlet pipe (16) for connecting the water supply equipment (B1) and the batching device,
the slag receiving hole of the slag removing device is arranged in the batching kettle (3), the slag outlet of the slag removing device is arranged outside the batching kettle (3), and the slag outlet of the slag removing device and the lime milk outlet (18) are arranged in a reverse direction.
7. The apparatus for producing a waste acid treating agent using slag powder according to claim 6,
the batching kettle (3) is in a conical hopper shape with a big top end and a small bottom end,
the feeding device (2) is a spiral feeding device;
the deslagging device is a scraper conveyor.
8. The apparatus for producing a waste acid treating agent using slag powder according to claim 6,
the discharge hole is connected with a feed inlet of the feeding device (2) through a discharge valve (5);
the feeding device (2) is horizontally arranged above the batching device.
9. The apparatus for producing a waste acid treating agent using slag powder according to claim 3,
the storage bin is a hollow cylinder, the conical hopper is a cone,
the hollow cylinder, the cone and the discharge hole are communicated in a seamless way,
the electromagnetic valve (9) is a three-way electromagnetic valve.
10. A waste acid treatment system comprising the apparatus for producing a waste acid treatment agent using slag powder according to any one of claims 1 to 9, wherein the waste acid treatment system further comprises: a neutralization oxidation tank (19) and an aeration device (20),
the aeration device (20) is arranged at the bottom of the neutralization oxidation pond (19);
the neutralization oxidation pond (19) is connected with the batching device to receive the waste acid treatment agent from the batching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220481931.8U CN217297518U (en) | 2022-03-07 | 2022-03-07 | Utilize equipment and waste acid processing system of sediment powder preparation waste acid treatment agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220481931.8U CN217297518U (en) | 2022-03-07 | 2022-03-07 | Utilize equipment and waste acid processing system of sediment powder preparation waste acid treatment agent |
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| Publication Number | Publication Date |
|---|---|
| CN217297518U true CN217297518U (en) | 2022-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220481931.8U Active CN217297518U (en) | 2022-03-07 | 2022-03-07 | Utilize equipment and waste acid processing system of sediment powder preparation waste acid treatment agent |
Country Status (1)
| Country | Link |
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| CN (1) | CN217297518U (en) |
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2022
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