CN214360575U - Equipment for organic recovery in rare earth transformation wastewater - Google Patents
Equipment for organic recovery in rare earth transformation wastewater Download PDFInfo
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- CN214360575U CN214360575U CN202022997664.3U CN202022997664U CN214360575U CN 214360575 U CN214360575 U CN 214360575U CN 202022997664 U CN202022997664 U CN 202022997664U CN 214360575 U CN214360575 U CN 214360575U
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Abstract
The utility model discloses an equipment of organic recovery in tombarthite transformation waste water, include: the device comprises a regulating tank, an air floatation device, a floating oil collecting tank, a filter, a clean water tank and a sludge concentration tank; the upper part of the regulating tank is connected with a floating oil collecting tank through an organic phase pipeline, and the lower part of the regulating tank is connected with air floatation equipment through a water phase pipeline; the lower part of the air floatation device is connected with a filter through a water phase pipeline, the filter is connected with a clean water tank through a water phase pipeline, and the upper part of the air floatation device is connected with a floating oil collecting tank through an organic phase pipeline; the bottom of the adjusting tank and the bottom of the air floatation device are respectively connected with a sludge concentration tank through a sewage discharge pipeline, and the upper part of the sludge concentration tank is connected with a floating oil collecting tank through an organic phase pipeline. The utility model discloses under the prerequisite of not throwing any medicament, organic high-efficient recovery in the realization waste water, the oil content of aquatic is less than or equal to 10mg/L, has reduced organic unit consumption, accomplishes the separation of oil, sediment and water in the waste water.
Description
Technical Field
The utility model belongs to tombarthite hydrometallurgy field, concretely relates to equipment of organic recovery in tombarthite transformation waste water.
Background
In the rare earth hydrometallurgy process, the transformation process is a process of converting rare earth sulfate into rare earth chloride, magnesium oxide or ammonia water is used for saponification in the process, and transformation wastewater can be produced at the same time. The transformation wastewater carries organic substances, which causes high unit consumption of system organic substances and kerosene, and increases production and manufacturing costs. As can be seen from the actual statistical data of production, the unit consumption of P507 is 15-18kg/tREO, and the unit consumption of kerosene is 20-23 kg/tREO.
At present, a wastewater clarification tank and a mud scraper are used for recovering organic matters in wastewater, but the efficiency is low, the main reason is that transformation wastewater carries organic matters and calcium magnesium sulfate solids, and the existing clarification tank has no slag tap, so that the calcium magnesium sulfate solids cannot be discharged in time, the calcium magnesium sulfate solids are accumulated in the wastewater tank and the mud scraper, the effective volume is reduced, and the wastewater clarification effect is poor; the organic matter in the clarification tank can only adopt a manual oil collecting mode, the operation is difficult, and the recovery amount is small; the calcium sulfate and magnesium sulfate solid accumulated slag needs to be manually stopped and cleaned regularly. Meanwhile, the oil content in the wastewater is high, so that the burden is increased for the downstream wastewater treatment process. Therefore, in order to effectively recover the organic matters and reduce the system slag accumulation, the wastewater produced in the transformation process needs to be subjected to oil removal, slag removal and organic recovery treatment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an equipment of organic recovery in tombarthite transformation waste water under the prerequisite of not throwing any medicament, realizes the high-efficient recovery of organic in the waste water, and the oil content of aquatic is less than or equal to 10mg/L, has reduced organic unit consumption, accomplishes the separation of oil, sediment and water in the waste water.
In order to achieve the above object, the utility model uses the technical solution that:
equipment for organic recovery in rare earth transformation wastewater comprises: the device comprises a regulating tank, an air floatation device, a floating oil collecting tank, a filter, a clean water tank and a sludge concentration tank; the upper part of the regulating tank is connected with a floating oil collecting tank through an organic phase pipeline, and the lower part of the regulating tank is connected with air floatation equipment through a water phase pipeline; the lower part of the air floatation device is connected with a filter through a water phase pipeline, the filter is connected with a clean water tank through a water phase pipeline, and the upper part of the air floatation device is connected with a floating oil collecting tank through an organic phase pipeline; the bottom of the adjusting tank and the bottom of the air floatation device are respectively connected with a sludge concentration tank through a sewage discharge pipeline, and the upper part of the sludge concentration tank is connected with a floating oil collecting tank through an organic phase pipeline.
Furthermore, the regulating tank and the filter are respectively provided with a liquid level meter.
Further, the organic phase pipeline, the water phase pipeline and the sludge pipeline are provided with delivery pumps.
Further, the position that is close to the bottom in the equalizing basin inside is provided with horizontal partition wall, sets up the track on the horizontal partition wall, installs the portable dredge pump that is used for absorbing bottom of the pool mud on the track, and the pump export passes through the hose and extends to the bottom of the pool.
Further, 2 vertical partition walls are arranged in the adjusting tank, an oil and slag scraping machine is mounted at the upper part of the trisected tank body, and the oil and slag scraping machine is a three-rake oil and slag scraping machine; the moving direction of the movable dredge pump is vertical to the moving direction of the three-rake oil and slag scraping machine.
Furthermore, the outer wall of the air flotation tank body of the air flotation equipment is provided with an operation track of an oil and mud scraper, and the oil and mud scraper is arranged on the operation track.
Further, the filter comprises a shell, the water distributor, the filter material layer and the water collector are arranged inside the shell, the water inlet is arranged at the top of the shell, the conveying pump is fixed at the water inlet, and the water inlet is connected with the air floatation equipment through a water phase pipeline; the water outlet is arranged at the lower part of the shell and is connected with a clean water tank through a water phase pipeline; the backwashing input pipe is connected to the water outlet, the backwashing output pipe is connected to the upper part of the shell, and the stirrer is arranged in the shell and positioned at the position of the filter material layer; the shell lateral part is provided with the access hole, and the bottom is provided with the bin outlet, and access hole, bin outlet are provided with the flange.
Further, the sludge concentration tank includes: the stirring machine is arranged in the tank body, the tank body is provided with a sludge input pipe, an organic phase outlet and a sewage outlet, the sludge input pipe extends into the lower part of the tank body, and the sludge input pipe is connected with a sludge pipeline; the organic phase outlet is positioned at the upper part of the tank body, the organic phase outlet is connected with an organic phase pipeline, and the drain outlet is positioned at the bottom of the tank body; the adjusting tank and the air floatation device are connected with a sludge input pipe through a sludge pipeline, and an organic phase outlet is connected with a floating oil collecting tank through an organic phase pipeline.
The utility model discloses technical effect includes:
the utility model realizes the organic high-efficiency recovery in the wastewater on the premise of not adding any medicament, and finally realizes that the oil content in the water is less than or equal to 10mg/L, reduces the organic unit consumption and the burden of the downstream wastewater treatment process, and realizes the separation of oil, slag and water in the wastewater; the automatic operation is realized, the labor cost is reduced, the operation environment is improved, the parking time is shortened, and the economic benefit is increased.
1. Compared with the traditional process, the tank body is adopted to be heightened, the efficient air flotation, the filter and the sludge concentration equipment are added, and the automatic control system is matched, so that the automatic operation of the whole production line is realized, the labor intensity of workers is reduced, the operation environment is improved, and the labor production efficiency is effectively improved;
2. the device realizes the continuous production of organic recovery in the transformation wastewater, and the flow and liquid level metering device can realize automatic starting and stopping;
3. continuous transformation wastewater is realized to pass through a regulating tank, an efficient air flotation filter and sludge concentration by a new equipment upgrading and process control mode, organic efficient recovery in the wastewater is realized, further organic unit consumption is reduced, the burden of a downstream wastewater treatment process is lightened, and oil, slag and water in the wastewater are well separated.
Drawings
FIG. 1 is a schematic structural diagram of an organic recovery device in the middle-rare earth transformation wastewater of the utility model;
FIG. 2 is a schematic structural diagram of a conditioning tank of the present invention;
FIG. 3 is a schematic view of the filter of the present invention;
fig. 4 is a schematic structural diagram of the sludge thickening tank of the present invention.
Detailed Description
The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
As shown in figure 1, is a structural schematic diagram of the organic recovery device in the rare earth transformation wastewater of the utility model.
Organic recovery equipment in rare earth transformation waste water includes: the device comprises a regulating tank 1, a liquid level meter 2, an air floatation device 3, a floating oil collecting tank 4, a filter 5, a clean water tank 6 and a sludge concentration tank 7.
The upper part of the adjusting tank 1 is connected with a floating oil collecting tank 4 through an organic phase pipeline, floating oil in the adjusting tank 1 automatically flows to the floating oil collecting tank 4 through the organic phase pipeline, the lower part of the adjusting tank 1 is connected with an air floatation device 3 through a water phase pipeline, and the bottom of the adjusting tank 1 is connected with a sludge concentration tank 7 through a sludge pipeline. The lower part of the air floatation device 3 is connected with a filter 5 through a water phase pipeline, the upper part is connected with a floating oil collecting tank 4 through an organic phase pipeline, and the bottom part is connected with a sludge concentration tank 7 through a sludge pipeline. The lower part of the filter 5 is connected with a clean water tank 6 through a water phase pipeline. The mud concentration tank 7 is connected with the floating oil collecting tank 4 through an organic phase pipeline. The liquid level meter 2 is arranged on the adjusting tank 1 and the filter 5.
The organic phase pipeline, the water phase pipeline and the sludge pipeline are provided with delivery pumps.
The control system sets the transformed wastewater input by the adjusting tank 1, monitors the liquid level height of the transformed wastewater in the adjusting tank 1 and the filter 5 through the liquid level meter 2, and adjusts the working states of the adjusting tank 1 and the filter 5 through the delivery pump; the continuous automatic work of the filter 5 is realized by monitoring the working state of a delivery pump on the filter 5 and controlling the starting frequency of backwashing; by the means and the self-flowing of the floating oil in the organic phase pipeline, the automatic operation of the whole production line is realized.
As shown in fig. 2, it is a schematic structural diagram of the equalizing basin 1 of the present invention.
In the utility model, the structure of the adjusting tank 1 is improved, the outer wall of the tank body is integrally heightened to 5m, and 2 vertical partition walls 11 are added in the tank body, so that the tank body trisection in the adjusting tank 1 ensures that mud impurities with stronger viscosity in water are better precipitated, and the mud impurities with stronger viscosity in water are precipitated at the bottom of the tank within a certain settling time; the high-low liquid level difference formed in the tank body enables floating oil in water to float upwards and be collected more conveniently.
The position that 1 inside of equalizing basin is close to the bottom is provided with the partition wall, sets up the track on the partition wall, installs the portable dredge pump 12 that is used for absorbing bottom of the pool mud on the track, and the pump export extends to the bottom of the pool through the hose, and portable dredge pump 12 can transversely round trip movement in the partition wall, the deposit of the bottom of the pool of being convenient for clearance to will deposit and send the mud pipeline to.
In the trisection tank body, the upper part of the tank body is provided with an oil and slag scraping machine, and the oil and slag scraping machine adopts a three-rake oil and slag scraping machine because the tank body is trisected in the adjusting tank 1; floating oil floating on the upper layer moves to the side part of the tank body through a three-rake type oil and slag scraping machine and enters an organic phase pipeline in a self-flowing mode; the bottom sediment is moved to the side part of the bottom of the tank through a three-rake oil and slag scraping machine, enters a sludge pipeline through a movable sludge suction pump 12, and is sent to a sludge concentration tank 7 for concentration. The movable dredge pump 12 is vertical to the moving direction of the three-rake oil and slag scraping machine.
The dissolved air system of the air floatation device 3 generates a large amount of micro bubbles in water, so that air is attached to suspended particles in wastewater in a highly dispersed micro bubble form to cause the density to be lower than that of water, and the air floats on liquid by utilizing the buoyancy principle, thereby realizing solid-liquid separation. An operation track of an oil and mud scraper is arranged on the outer wall of the air floatation tank body of the air floatation equipment 3, the oil and mud scraper moves on the operation track, the oil and mud scraper collects floating oil into an organic phase pipeline, and the organic phase pipeline is connected with a floating oil collecting tank 4; sludge at the bottom of the tank is concentrated by the oil scraping and mud scraping machine and then enters a sludge pipeline, and is conveyed to the sludge concentration tank 7 by the conveying pump.
As shown in fig. 3, it is a schematic structural diagram of the filter 5 of the present invention.
The filter 5 is a filtering and separating device, the water distributor, the filter material layer and the water collector are arranged inside the shell 51, the filter material layer adopts an oil-resistant filter material, namely walnut shells, as a filter medium, and oil and suspended matters in water are removed by utilizing the characteristics of large specific surface area, strong adsorption force and large pollutant interception capacity of the walnut shells. A water inlet 52 of the filter 5 is arranged at the top of the shell 51, the conveying pump is fixed at the water inlet 52, the water inlet 52 is connected with a water phase pipeline, and the water phase pipeline is connected with the air floatation device 3; the water outlet 53 is arranged at the lower part of the shell 51, and the water outlet 53 is connected with a water phase pipeline and is connected with the clean water tank 6 through the water phase pipeline. A backwashing water inlet pipe 54 is connected to the water outlet 53, and a backwashing water outlet pipe 55 is connected to an upper portion of the casing 51. The agitator is positioned within the housing 51 at the level of the frit layer. The lateral part of the shell 51 is provided with an access hole 56, the bottom of the shell is provided with a discharge hole 57, the access hole 56 and the discharge hole 57 are provided with flanges, and the flanges are opened for maintenance operation when a filter material layer is maintained or replaced.
During filtering, the wastewater enters from the water inlet 52 from top to bottom, flows through the water distributor, the filter material layer and the water collector, and enters the water phase pipeline from the water outlet 53 after filtering.
During back washing, the stirrer turns the filter material, and water flows from bottom to top, enters the back washing input pipe 54 and the water outlet 53 and flows out of the back washing output pipe 55, so that the filter material layer is thoroughly washed and regenerated.
As shown in fig. 4, it is a schematic structural diagram of the sludge concentration tank 7 of the present invention.
The sludge concentration tank 7 includes: the tank 71 and the stirring machine 72, wherein the stirring machine 72 is arranged in the tank 71, the tank 71 is provided with a sludge input pipe 73, an organic phase outlet 74 and a sewage outlet 75, the sludge input pipe 73 extends into the lower part of the tank 71, and the sludge input pipe 73 is connected with a sludge pipeline; an organic phase outlet 74 is positioned at the upper part of the tank body 71, and the organic phase outlet 74 is connected with an organic phase pipeline; a drain 75 is located at the bottom of the tank 71.
The adjusting tank 1 and the air floatation device 3 are connected with a sludge input pipe 73 through a sludge pipeline, and an organic phase outlet 74 is connected with the floating oil collecting tank 4 through an organic phase pipeline.
The stirring machine 72 slowly stirs, and under the action of stirring, the solid matter in the sludge is settled and compacted under the action of gravity by adopting a gravity concentration method. The retention time of the sludge in the tank 71 is generally about 1-12 hours, the sludge is highly concentrated in the tank 71 and is periodically discharged from the sewage outlet 75 under pressure. Because the sludge has low water content and good dehydration performance, the sludge can be directly sent to the next procedure, the sludge enables the floating oil (organic phase 3) to float upwards through stirring, and the organic phase 3 comes out from the organic phase outlet 74 and enters the floating oil collecting tank 4 through an organic phase pipeline.
The organic recovery method of the rare earth transformation wastewater comprises the following steps:
step 1: setting the feeding amount of the transformation wastewater with the rare earth content less than or equal to 0.3g/L and the pH value of 3.5-5 according to the treatment capacity of equipment, and controlling the flow of the transformation wastewater to enter an adjusting tank 1 through a flow control system;
step 2: conveying the clarified wastewater (water phase 1) in the regulating tank 1 to an air flotation device 3 by using a conveying pump, wherein in order to ensure that the wastewater reaches the process index, the wastewater (water phase 2) purified by the air flotation device 3 enters a filter 5, the effluent (water phase 3) of the filter 5 enters a clean water tank 6, and the water in the clean water tank 6 enters the next production process;
and step 3: floating oil (organic phase 2) in the adjusting tank 1 and the air floatation device 3 automatically flows to a floating oil collecting tank 4 through an organic phase pipeline;
and 4, step 4: the sludge in the adjusting tank 1 and the air floatation device 3 is pumped into a sludge concentration tank 7 through a delivery pump, the floating oil (organic phase 3) in the sludge floats upwards through the stirring in the sludge concentration tank 7, the floating oil (organic phase 3) in the sludge concentration tank 7 automatically flows to a floating oil collecting tank 4, and the sludge in the sludge concentration tank 7 is delivered to the next procedure.
Example 1
Transformation wastewater REO is less than 0.3g/L, pH is 3.5, wastewater temperature is 40 ℃, total oil: 169.3mg/L, SS: 1355 mg/L. Regulating reservoir 1 effective volume 1400m3And the given flow rate of the transformed wastewater is 175m3The wastewater is fed by a flow control system.
Firstly, the transformation wastewater enters an adjusting tank 1, the retention time is about 8min, a clarified water phase 1 enters an air floatation device 3, and an organic phase 1 is collected by a three-rake mud scraper and then automatically flows to a floating oil collecting tank 4; in the air flotation equipment 3, the water phase 2 after air flotation is conveyed to a filter 5 by a conveying pump, and the water phase 3 after filtration enters a clean water tank 6 (for the next process); the organic phase 2 in the air floatation device 3 is collected by a mud scraper and then automatically flows to a floating oil collecting tank 4; the sludge in the adjusting tank 1 and the sludge in the air floatation device 3 are conveyed to a sludge concentration tank 7 through a conveying pump, and the organic phase 3 automatically flows to the floating oil collecting tank 4 under the stirring action of the sludge concentration tank 7. The oil content in the wastewater generated by the operation is controlled to be 8mg/L, and the SS: 32mg/L, and the organic recovery rate is 82.4%.
Example 2
Transformation wastewater REO is less than 0.3g/L, pH is 4, wastewater temperature is 42 ℃, total oil: 173.5mg/L, SS: 1546 mg/L. The effective volume of the adjusting tank is 1400m3And the given flow rate of the transformed wastewater is 170m3/h。
Feeding wastewater by a flow control system, firstly feeding the wastewater into an adjusting tank 1, allowing the wastewater to stay for about 9min, allowing a clarified water phase 1 to enter an air floatation device 3, collecting an organic phase 1 in the adjusting tank 1 by a three-rake mud scraper, then automatically flowing the organic phase to a floating oil collecting tank 4, conveying a water phase 2 subjected to air floatation in the air floatation device 3 into a filter 5, and allowing a filtered water phase 3 to enter a clean water tank 6 (for the next process); the organic phase 2 in the air floatation device 3 is collected by a mud scraper and then flows to the floating oil collecting tank 4, the sludge in the adjusting tank 1 and the air floatation device 3 is conveyed to the sludge concentration tank 7 by the conveying pump, and the organic phase 3 flows to the floating oil collecting tank 4 under the stirring action of the sludge concentration tank 7. The condition controls the oil content in the wastewater generated by the operation to be 10mg/L, and the SS: 36mg/L, the organic recovery was 87.2%.
Example 3
Transformation wastewater REO is less than 0.3g/L, pH is 4.4, wastewater temperature is 48 ℃, total oil: 158.9mg/L, SS: 1375 mg/L. The effective volume of the adjusting tank is 1400m3And the given flow of the transformed wastewater is 180m3/h。
Feeding wastewater by a flow control system, firstly feeding the wastewater into an adjusting tank 1, keeping the wastewater for about 7.5min, feeding a clarified water phase 1 into an air floatation device 3, collecting an organic phase 1 by a three-rake mud scraper, then automatically flowing the organic phase to a floating oil collecting tank 4, conveying and pumping a water phase 2 subjected to air floatation into a filter 5, and feeding the filtered water phase 3 into a clean water tank 6 (for the next process); the organic phase 2 is collected by a mud scraper and then flows to the floating oil collecting tank 4, the sludge in the adjusting tank 1 and the air floatation equipment 3 is conveyed to the sludge concentration tank 7 by the conveying pump, and the organic phase 3 flows to the floating oil collecting tank 4 under the stirring action of the sludge concentration tank 7. The oil content in the wastewater generated by the operation is controlled to be 8.7mg/L, and the SS: 29mg/L, the organic recovery was 83.5%.
The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (8)
1. The utility model provides an equipment of organic recovery in tombarthite transformation waste water which characterized in that includes: the device comprises a regulating tank, an air floatation device, a floating oil collecting tank, a filter, a clean water tank and a sludge concentration tank; the upper part of the regulating tank is connected with a floating oil collecting tank through an organic phase pipeline, and the lower part of the regulating tank is connected with air floatation equipment through a water phase pipeline; the lower part of the air floatation device is connected with a filter through a water phase pipeline, the filter is connected with a clean water tank through a water phase pipeline, and the upper part of the air floatation device is connected with a floating oil collecting tank through an organic phase pipeline; the bottom of the adjusting tank and the bottom of the air floatation device are respectively connected with a sludge concentration tank through a sewage discharge pipeline, and the upper part of the sludge concentration tank is connected with a floating oil collecting tank through an organic phase pipeline.
2. The apparatus for recovering organic compounds from rare earth conversion wastewater according to claim 1, wherein the adjusting tank and the filter are respectively provided with a liquid level meter.
3. The apparatus for recovering organic matters from rare earth conversion wastewater according to claim 1, wherein the organic phase pipeline, the aqueous phase pipeline and the sludge pipeline are provided with a transfer pump.
4. The apparatus for recovering organic compounds from rare earth conversion wastewater according to claim 1, wherein a transverse partition wall is provided at a position near the bottom inside the conditioning tank, a rail is provided on the transverse partition wall, a mobile sludge pump for sucking sludge at the bottom of the tank is installed on the rail, and the outlet of the pump extends to the bottom of the tank through a hose.
5. The apparatus for recovering organic compounds from rare earth conversion wastewater according to claim 4, wherein 2 vertical partition walls are provided inside the conditioning tank, and an oil and slag scraper is installed on the top of the trisected tank body, and the oil and slag scraper is a triple-rake oil and slag scraper; the moving direction of the movable dredge pump is vertical to the moving direction of the three-rake oil and slag scraping machine.
6. The apparatus for recovering organic matters from rare earth conversion wastewater according to claim 1, wherein an outer wall of a flotation tank body of the flotation device is provided with a running track of an oil and mud scraper, and the oil and mud scraper is arranged on the running track.
7. The apparatus for recovering organic compounds from rare earth conversion wastewater according to claim 1, wherein the filter comprises a housing, the water distributor, the filter material layer and the water collector are disposed inside the housing, the water inlet is disposed at the top of the housing, the transfer pump is fixed at the water inlet, and the water inlet is connected to the air flotation device through the water phase pipeline; the water outlet is arranged at the lower part of the shell and is connected with a clean water tank through a water phase pipeline; the backwashing input pipe is connected to the water outlet, the backwashing output pipe is connected to the upper part of the shell, and the stirrer is arranged in the shell and positioned at the position of the filter material layer; the shell lateral part is provided with the access hole, and the bottom is provided with the bin outlet, and access hole, bin outlet are provided with the flange.
8. The apparatus for recovering organic compounds from rare earth conversion wastewater according to claim 1, wherein the sludge thickening tank comprises: the stirring machine is arranged in the tank body, the tank body is provided with a sludge input pipe, an organic phase outlet and a sewage outlet, the sludge input pipe extends into the lower part of the tank body, and the sludge input pipe is connected with a sludge pipeline; the organic phase outlet is positioned at the upper part of the tank body, the organic phase outlet is connected with an organic phase pipeline, and the drain outlet is positioned at the bottom of the tank body; the adjusting tank and the air floatation device are connected with a sludge input pipe through a sludge pipeline, and an organic phase outlet is connected with a floating oil collecting tank through an organic phase pipeline.
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