Fluorine-containing wastewater sludge reduction deviceTechnical Field
The utility model belongs to the technical field of water treatment, and particularly relates to a fluorine-containing wastewater sludge reduction device.
Background
In recent years, with the rapid development of fluorosilicone industry, especially fluorine chemical industry, fluorine refrigerant and new fluorine-containing material industry, such as self-cleaning paint, film material and the like, fluorine-containing organic raw materials, fluorine-containing catalyst, fluorine-containing solvent and the like are used in large quantities, and the wastewater discharge amount containing organic fluorine in industrial production is also increased significantly.
The industrial fluorine-containing wastewater generally has higher fluorine content, and aiming at the fluorine-containing wastewater, the treatment methods commonly used at present mainly comprise a chemical precipitation method, a coagulation sedimentation method, an adsorption method, a membrane separation method, a biochemical treatment method and the like.
Among them, the chemical precipitation method is one of methods which are used earlier in industry, and is also one of common methods for treating wastewater containing high content of fluorine ions. By calcium ions (Ca)2+ ) And fluoride ion (F) in the wastewater- ) Formation of calcium fluoride (CaF)2 ) And removing the calcium fluoride precipitate from the water body by adopting a solid-liquid separation method, so as to remove fluorine ions from the wastewater.
The calcium salt agent commonly used for removing fluoride ions in the fluoride-containing wastewater in chemical production is lime, and the calcium ions and the fluoride ions in the lime are used for preparing the fluorine-containing wastewater by 1: molar ratio of 2 to CaF2 The amount of calcium oxide needed to remove 1mg of fluorine by precipitation is about 1.47mg in theory, but the lime is insufficient to contact with the wastewater, and in the actual treatment process, the lime addition amount is often required to be over 50%, so that the sludge precipitation amount is excessive, the treatment pressure is high, and the medicament cost is high.
In addition, lime is soluble in waterThe solubility decreases with increasing temperature, and at 20℃the solubility is 0.165g, the solubility is very low, and the as-grown CaF2 The precipitate is coated with Ca (OH)2 The surface of the particles is not fully utilized, so the dosage is large.
Another calcium salt agent is CaCl2 The solution, under the same conditions, has a solubility of 74.5g of calcium chloride in water, and thus can be used as a calcium salt medicament.
Patent CN106167312a discloses a mixed reaction tank for treating fluorine-containing wastewater and a treatment method thereof, and the following is pointed out: a spiral stirring device is arranged at the central part of the reaction tank and comprises a stirring shaft and a plurality of stirring paddles arranged on the stirring shaft; the structure is used for fully mixing the waste liquid and CaCl by spiral stirring and combining with the flushing of CDA high-pressure air2 Powder, caCl added into pool2 The powder is uniformly distributed in the three-dimensional space of the pool; no CaCl is arranged at the bottom and the periphery of the pool2 Powder is dead at dead corners; the fluoride ions from the waste liquid coming from the bottom can have enough time and Ca2+ Contact to form precipitate and mix with flocculant to flow out, and the precipitate is fully deposited in a deposition pond.
The wastewater is defluorinated by adopting the method, the reaction time is longer, the reaction is more complete, the improvement of the working efficiency is not facilitated, the occupation area of the mixed reaction tank is large, and excessive CaCl must be added in order to effectively reduce the fluoride ions in the wastewater2 After the powder reaches saturated solubility, caCl2 The powder can not be dissolved in water, a large amount of sediment is easy to form at the bottom of the pool after long-time operation, the stirring rotating speed is low, the sediment at the bottom of the pool is difficult to break up, and the pool is required to be emptied and cleaned manually. The spiral stirring blades are more, the cleaning is troublesome, the corners of the spiral blades are basically incapable of being cleaned effectively, the stirring effect is affected after the blades scale, and F is caused- And Ca2+ Insufficient contact is made.
Therefore, there is a need for an apparatus that can effectively reduce the amount of sludge generated during the treatment of fluorine-containing wastewater.
Disclosure of Invention
The utility model aims to provide a fluorine-containing wastewater sludge reduction device for avoiding the problem of excessive sludge caused by adding excessive medicament calcium salt in the process of removing fluorine ions in fluorine-containing wastewater, and the adding amount of the calcium salt can be reduced on the premise of effectively removing the fluorine ions in the wastewater, so that the purpose of reducing the sludge is achieved.
The technical scheme of the utility model is as follows:
a fluorine-containing wastewater sludge reduction device comprises a fluorine-containing wastewater collection tank, a medicament storage tank, a rotating magnetic field ion accelerator, a buffer tank, a filter press and an adjusting tank.
The rotating magnetic field ion accelerator is controlled by a control cabinet connected with the rotating magnetic field ion accelerator; the control cabinet is internally provided with an ALFA controller, an isolation transformer, a power supply unit, a rotating magnetic field driving motor and a control circuit device.
The casing of the rotating magnetic field ion accelerator is a double-layer structure with a hollow interlayer, and an electromagnetic inductor is arranged in the hollow interlayer and is connected with a rotating magnetic field driving motor in the control cabinet.
The rotary magnetic field ion accelerator is internally provided with a feeder, the feeder is provided with two feed inlets, namely a first feed inlet and a second feed inlet, and the two feed inlets are positioned on the outer side of the shell of the rotary magnetic field ion accelerator.
Holes are distributed on the outer wall of the feeder and used for discharging waste water, and a magnetic conductive workpiece is placed in a cavity of the feeder.
When the control cabinet is electrified, the electromagnetic inductor which is electrically connected with the control cabinet and is positioned in the hollow interlayer of the rotating magnetic field ion accelerator shell is driven by the rotating magnetic field driving motor to generate a magnetic field, at the moment, the feeder which is arranged in the shell is arranged, magnetic conductive workpieces in the cavity collide with each other under the action of the magnetic field and collide with the inner wall of the cavity to form high-speed rotation, the rotating speed is 3000-5000rpm, the chemical and physical processes between fluorine-containing wastewater and the medicament are effectively enhanced, the fluorine-containing wastewater and the medicament are fully contacted and mixed in the rotating magnetic field ion accelerator, and the contact is not provided with four corners and the mixing is fully enough, so that excessive medicament adding is not needed, the use amount of calcium salt is reduced, and the sludge generation amount is reduced while the purpose of removing fluorine ions is achieved.
The fluorine-containing wastewater collection pool is connected with a first feed inlet of a feeder in the rotating magnetic field ion accelerator through a water conveying pump and a water conveying pipeline; a liquid level transmitter is arranged in the fluorine-containing wastewater collection tank and is connected with a control cabinet of the rotating magnetic field ion accelerator; the water pipe line is provided with a flow transmitter, and the flow transmitter is connected with a control cabinet of the rotating magnetic field ion accelerator and is controlled by a PLC control system. So that the water storage amount of the wastewater in the fluorine-containing wastewater collecting tank can be accurately controlled, and the water inflow amount of the fluorine-containing wastewater in the feeder in the rotating magnetic field ion accelerator can be accurately regulated and controlled.
The medicament storage tank is connected with a second feed inlet of a feeder in the rotating magnetic field ion accelerator through a medicament pump and a medicament delivery pipeline; the drug delivery pipeline is provided with a flow transmitter, and the flow transmitter is connected with a control cabinet of the rotating magnetic field ion accelerator and is controlled by a PLC control system. The design can accurately regulate and control the drug delivery amount of the feeder in the rotating magnetic field ion accelerator according to the water inflow condition of the fluorine wastewater in the rotating magnetic field ion accelerator, so that the excessive drug delivery amount can not occur, the fluorine ions in the wastewater can be effectively removed, and the purpose of reducing the sludge amount is achieved.
The bottom discharge port of the rotating magnetic field ion accelerator is connected with the tank port of the buffer tank through a discharge pipeline; and after the fluorine-containing wastewater and the medicament are fully contacted and mixed in the rotating magnetic field ion accelerator, discharging the mixture into a buffer pool. The buffer pool plays a role in buffering the mixed solution of the fluorine-containing wastewater and the medicament, and starts stirring after reaching a certain liquid level, and enters the filter press.
The buffer pool is internally provided with a stirrer and a liquid level transmitter, and the liquid level transmitter is connected with a control cabinet of the rotating magnetic field ion accelerator and is controlled by a PLC control system; a sewage pump is arranged at the bottom of the buffer pool and is connected with a feed inlet of the filter press through a sewage pipeline. When the mixed liquid of the fluorine-containing wastewater and the medicament in the buffer pool is accumulated to a certain liquid level, starting a stirrer, and conveying the mixed liquid to a filter press through a sewage pump and a sewage pipeline; and (5) carrying out outward treatment on sludge generated by filter pressing of a filter press.
The filtrate outlet of the filter press is connected with the tank mouth of the regulating tank through a filtrate pipeline; the wastewater from which fluoride ions are removed is then conveyed from the filtrate outlet of the filter press via a filtrate line to the conditioning tank.
A drainage pump is arranged at the bottom of the regulating tank; a liquid level transmitter is arranged in the regulating tank and is connected with a control cabinet of the rotating magnetic field ion accelerator and controlled by a PLC control system. The regulating tank plays a role in buffering wastewater from which fluoride ions are removed, and energy loss caused by frequent conveying is avoided. The liquid level transmitter can control the liquid level in the regulating tank, and when the liquid level reaches a high limit set value, the drainage pump is started to send the treated wastewater to the downstream for other further water treatment.
Further, the reagent storage tank of the fluorine-containing wastewater sludge reduction device is provided with a liquid level transmitter and a stirrer, wherein the liquid level transmitter is connected with a control cabinet of the rotating magnetic field ion accelerator.
Furthermore, the reagent pumps of the fluorine-containing wastewater sludge reduction device are provided with 2 reagent pumps, each reagent pump is provided with a frequency converter and a pressure transmitter, and the frequency converter and the pressure transmitter are connected with a control cabinet of the rotating magnetic field ion accelerator and controlled by a PLC control system. So 2 medicament pumps can work alternately, realize continuous uninterrupted operation.
Furthermore, the 2 medicament pumps of the fluorine-containing wastewater sludge reduction device are respectively arranged on two parallel medicament delivery pipelines.
Further, the water delivery pump of the fluorine-containing wastewater sludge reduction device is arranged at the bottom of the fluorine-containing wastewater collection tank.
The beneficial effects of the utility model are as follows: the utility model relates to a fluorine-containing wastewater sludge reduction device which comprises a fluorine-containing wastewater collection tank, a medicament storage tank, a rotating magnetic field ion accelerator, a buffer tank, a filter press and an adjusting tank.
The magnetic conductive workpieces move in the working area and form a vortex layer in the rotating electromagnetic field to forcefully mix fluorine-containing wastewater and the medicament, so that full contact reaction between the medicament and the fluorine-containing wastewater without dead angle is realized, and the medicament addition amount is greatly reduced on the premise of ensuring removal of fluorine ions. For example, when one ton of fluorine-containing wastewater is treated to make the fluorine ions in the wastewater be treated to be less than 30ppm, the adding amount of the medicament can be reduced by 31%, and the sludge generation amount can be reduced by 58%.
The fluorine-containing wastewater sludge reduction device has high automation degree, can be fully automatically controlled to operate and remotely monitored, and is beneficial to reducing the labor intensity of workers in workshops. The method can effectively remove the fluoride ions in the wastewater, reduce the dosage of the medicament and reduce the sludge production.
Drawings
FIG. 1 is a schematic diagram of a fluorine-containing wastewater sludge reduction device according to the present utility model.
Fig. 2 is a schematic diagram of the structure of the outer wall of the rotating magnetic field ion accelerator feeder in the fluorine-containing wastewater sludge reduction device.
Fig. 3 is a schematic diagram of the inner cavity structure of the rotating magnetic field ion accelerator feeder in the fluorine-containing wastewater sludge reduction device.
Wherein 1 is a fluorine-containing wastewater collection tank, 2 is a medicament storage tank, 3 is a rotating magnetic field ion accelerator, 4 is a buffer tank, 5 is a filter press, 6 is an adjusting tank, 7 is a control cabinet, 8 is an electromagnetic inductor, 9 is a rotating magnetic field driving motor, 10 is a feeder, 11 is a first feed inlet, 12 is a second feed inlet, 13 is a hole, 14 is a magnetic conductive workpiece, 15 is a water delivery pump, 16 is a water delivery pipeline, 17 is a liquid level transmitter, 18 is a flow transmitter, 19 is a medicament pump, 20 is a medicament delivery pipeline, 21 is a discharge pipeline, 22 is a stirrer, 23 is a sewage pump, 24 is a sewage pipeline, 25 is a filtrate pipeline, and 26 is a drainage pump.
Detailed Description
The technical scheme of the utility model is described in detail below with reference to the accompanying drawings.
Example 1
The fluorine-containing wastewater sludge reduction device comprises a fluorine-containing wastewater collection tank 1, a medicament storage tank 2, a rotating magnetic field ion accelerator 3, a buffer tank 4, a filter press 5 and an adjusting tank 6.
The rotating magnetic field ion accelerator 3 is controlled by a control cabinet 7 connected with the rotating magnetic field ion accelerator;
the casing of the rotating magnetic field ion accelerator 3 is a double-layer structure with a hollow interlayer, an electromagnetic inductor 8 is arranged in the hollow interlayer, and the electromagnetic inductor 8 is connected with a rotating magnetic field driving motor 9 in a control cabinet 7;
the rotary magnetic field ion accelerator 3 is internally provided with a feeder 10, the feeder 10 is provided with two feed inlets, namely a first feed inlet 11 and a second feed inlet 12, which are positioned outside the shell of the rotary magnetic field ion accelerator 3;
holes 13 are distributed on the outer wall of the feeder 10, and a magnetic conductive workpiece 14 is placed in a cavity of the feeder 10;
the fluorine-containing wastewater collection tank 1 is connected with a first feed inlet 11 of a feeder 10 in the rotating magnetic field ion accelerator 3 through a water conveying pump 15 and a water conveying pipeline 16; the water delivery pump 15 is arranged at the bottom of the fluorine-containing wastewater collection tank 1.
A liquid level transmitter 17 is arranged in the fluorine-containing wastewater collection tank 1 and is used for monitoring the liquid level of the fluorine-containing wastewater in the fluorine-containing wastewater collection tank 1. The liquid level transmitter 17 is connected with a PLC controller in a control cabinet 7 of the rotating magnetic field ion accelerator 3; the water conveying line 16 is provided with a flow transmitter 18 for measuring the inflow of fluorine-containing wastewater, the flow transmitter 18 is connected with a PLC controller in a control cabinet 7 of the rotating magnetic field ion accelerator 3, and the inflow of fluorine-containing wastewater is regulated and controlled in real time according to the condition of the feeder 10 in the rotating magnetic field ion accelerator 3 by the control of a PLC control system.
The medicament storage tank 2 is connected with a second feed inlet 12 of the feeder 10 in the rotating magnetic field ion accelerator 3 through a medicament pump 19 and a medicament delivery line 20; the medicine pump 19 is provided with 2 medicine pumps, and each medicine pump is provided on two parallel medicine feeding lines 20.
Each of the agent pumps 19 may be equipped with a frequency converter and a pressure transmitter, both of which are connected to a PLC controller in a control cabinet of the rotating magnetic field ion accelerator, controlled by a PLC control system. Frequency converter for backupWhen necessary, the pump is switched for use, the frequency converter is connected to the PLC system, and if one of the supply pumps fails, the standby supply pump is automatically started, so that the influence on workshop wastewater treatment is avoided. The frequency of the frequency converter of the medicament pump can be regulated according to the concentration of fluoride ions in the wastewater, so that the added medicament CaCl can be further and more accurately controlled2 The amount of the solution is not matched with fluoride ions in the wastewater.
A flow transmitter 18 is provided on the drug delivery line 20 for metering a pharmaceutical agent such as CaCl2 Dosage of the solution. The flow transmitter 18 is connected with a PLC controller in the control cabinet 7 of the rotating magnetic field ion accelerator 3; the medicine tank 2 is provided with a stirrer 22 for preventing the precipitation of the medicine and a level transmitter 17 for monitoring the level of the medicine solution, the stirrer 22 being provided. The liquid level in the medicament storage tank 2 is provided with a low liquid level and a high liquid level, an alarm is displayed when the liquid level is high and low, an operator is informed of stopping adding medicament when the liquid level is high, and the medicament is timely supplemented when the liquid level is low.
The bottom discharge port of the rotating magnetic field ion accelerator 3 is connected with the tank port of the buffer tank 4 through a discharge pipeline 21;
the buffer tank 4 is internally provided with a stirrer 22 and a liquid level transmitter 17 for monitoring the liquid level of the tank, and the liquid level transmitter 17 is connected with a PLC controller in a control cabinet 7 of the rotating magnetic field ion accelerator 3; a sewage pump 23 is arranged at the bottom of the buffer pool 4, and the sewage pump 23 is connected with a feed inlet of the filter press 5 through a sewage pipeline 24;
the filtrate outlet of the filter press 5 is connected with the tank mouth of the regulating tank 6 through a filtrate pipeline 25;
a drain pump 26 is arranged at the bottom of the regulating tank 6; a liquid level transmitter 17 for monitoring the liquid level of the water tank is arranged in the regulating tank 6, and the liquid level transmitter 17 is connected with a PLC controller in the control cabinet 7 of the rotating magnetic field ion accelerator 3.
The liquid level of the fluorine-containing wastewater collecting tank 1 is provided with a low liquid level and a high liquid level, when the high liquid level of the fluorine-containing wastewater collecting tank 1 reaches a set value, wastewater feeding is stopped, an operator samples and sends the wastewater to a laboratory, and after the fluorine ion content in the wastewater is detected, a water conveying pump 15, a medicament pump 19 and a rotating magnetic field ion adding device are startedThe speed device 3, the water delivery pump 15 sends the fluorine-containing wastewater to the rotating magnetic field ion accelerator 3, and the medicament pump 19 sends medicament CaCl2 The solution is sent to a rotating magnetic field ion accelerator 3; simultaneously, the reagent pump 19 is regulated, and CaCl corresponding to the fluoride ions in the wastewater can be completely removed according to the flow of the fluoride-containing wastewater displayed by the flow transmitter 18 on the water conveying pipeline 162 The solution, dosage is displayed by flow transducer 18 on drug delivery line 20.
The fluorine-containing wastewater and the reagent solution are respectively conveyed into a feeder 10 of the rotating magnetic field ion accelerator through a water conveying pipeline 16 and a medicine conveying pipeline 20, an electromagnetic inductor 8 generates a rotating magnetic field under the driving of a rotating magnetic field driving motor 9, a magnetic conductive workpiece 14 in the cavity of the feeder 10 moves in a working area to form a vortex layer, the fluorine-containing wastewater and the reagent solution are fully mixed and contacted in the rotating magnetic field ion accelerator 3, the outer wall of the feeder 10 is fully distributed with holes 13 for discharging wastewater, and the wastewater is conveyed through a discharge hole at the bottom of a shell and discharged into a buffer pool 4.
The buffer tank 4 is provided with a liquid level transmitter 17, when the liquid level reaches a high limit set value, the stirrer 22 is started, the stirring time is at least 30min, then an operator starts a sewage pump 23 to send wastewater into the filter press 5, sludge is transported outwards after the completion of filter pressing, and the sludge amount is reduced by 58%. The wastewater with fluoride ions removed after the press filtration enters an adjusting tank 6, water is taken from the adjusting tank 6 and sent to a laboratory for detection, the F-of the detection result is less than or equal to 30ppm, the wastewater effluent reaches the standard, and the wastewater effluent is sent to the downstream for the next water treatment, so that the expected purpose is achieved. When the buffer tank 4 level reaches the low limit set point, the operator stops the blowdown pump 23 and the filter press 5.
The liquid level of the regulating tank 6 is provided with a liquid level transmitter 17, when the liquid level reaches a high limit set value, an operator starts a drainage pump 26 to send treated wastewater into a downstream wastewater treatment device, and when the liquid level reaches a low limit set value, the drainage pump 26 automatically stops running.
When the low liquid level of the fluorine-containing wastewater collection tank 1 reaches a set value, the water delivery pump 15, the medicament pump 19 and the rotating magnetic field ion accelerator 3 are started in a chained mode, and the fluorine-containing wastewater collection tank 1 starts to feed fluorine-containing wastewater.