CN214299904U - Acid wastewater recycling production device in titanium dioxide production by sulfuric acid process - Google Patents
Acid wastewater recycling production device in titanium dioxide production by sulfuric acid process Download PDFInfo
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- CN214299904U CN214299904U CN202120238407.3U CN202120238407U CN214299904U CN 214299904 U CN214299904 U CN 214299904U CN 202120238407 U CN202120238407 U CN 202120238407U CN 214299904 U CN214299904 U CN 214299904U
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Abstract
The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid method comprises a lime silo, wherein a star-shaped feeder is arranged at an outlet of the lime silo, the lime silo is communicated to an inlet of a slurry melting tank through the star-shaped feeder, an outlet of the slurry melting tank is communicated to an inlet of a lime tank through a lime milk conveying pump, and an outlet of the lime tank is communicated to an inlet of a neutralization tank through a lime milk feeding pump; the neutralization tank is provided with an acidic wastewater inlet, a lime milk inlet, a circulating liquid inlet and a feed back port; and a PH automatic detection control system is arranged at the top of the neutralization tank for pumping the materials. The utility model discloses can realize titanium gypsum comprehensive utilization, it is high to have solved the titanium gypsum moisture of present internal titanium white powder enterprise, and the problem that can't utilize is settled to the crystal form control and subsequent flocculation of crystal through neutralization process, adopts high-efficient titanium gypsum to squeeze the moisture that the sheet frame made titanium gypsum and is less than or equal to 20%.
Description
Technical Field
The utility model discloses titanium white powder production auxiliary assembly field, concretely relates to acid waste water recycle apparatus for producing in sulfuric acid process titanium white production.
Background
Titanium dioxide is an important inorganic chemical pigment, the main component of which is titanium dioxide, and the titanium dioxide has important application in the industries of paint, printing ink, papermaking, plastic rubber, chemical fiber, ceramic and the like. The titanium dioxide manufacturing method has two methods: sulfuric acid process and chlorination process, and domestic titanium dioxide production enterprises mainly adopt the sulfuric acid process.
Titanium dioxide is prepared by sulfuric acid method, titanium iron powder and concentrated sulfuric acid are subjected to acidolysis reaction to produce titanyl sulfate, metatitanic acid is generated by hydrolysis, and then titanium dioxide products are obtained by calcining and crushing. The sulfuric acid method has the advantages that the ilmenite and the sulfuric acid which are low in price and easy to obtain can be used as raw materials, the technology is mature, the equipment is simple, and the anti-corrosion material is easy to solve; its disadvantages are long flow path, high consumption of sulfuric acid and water, and more waste and by-products.
In the production process of industrial sulfuric acid method titanium dioxide, a large amount of acidic wastewater is produced, particularly acidic wastewater with the acid concentration of 5-10%, the output of per ton of titanium dioxide is 10-20 tons, the acidic wastewater contains a large amount of ferrous sulfate due to low acid concentration, the ferrous sulfate content is 0.25-0.5% calculated by simple substance iron, the current general practice is to neutralize the acidic wastewater with lime or carbide slag, the pH value of the neutralized wastewater is controlled to be 6-9, the neutralized wastewater is filtered through a plate frame, the iron ions exceed the standard due to incomplete neutralization process of the plate frame filtrate, secondary filter pressing is needed after aeration treatment, partial enterprises need to add sodium hypochlorite to oxidize the residual iron ions, energy waste is caused, the total salt concentration of discharged water is increased, 5-8 tons of gypsum with 50% water are produced by per ton of titanium dioxide finished products after neutralization treatment, the gypsum is red in appearance because of containing a large amount of iron ions, and the gypsum cannot be used industrially on a large scale due to high moisture content and can only be subjected to landfill treatment, the landfill treatment occupies a large amount of land resources, not only is a large amount of land waste caused, but also certain environmental pollution is caused, and the leakage liquid of the titanium gypsum with high moisture content is red.
China is a world with large consumption of cement, and 2-4% (SO) needs to be added into each ton of cement3Meter, titanium gypsum SO3The content of dihydrate gypsum is 36%, the addition of titanium gypsum is about 8.3% calculated according to the average value of 3%, the setting time of cement is adjusted, natural gypsum is forbidden to be used as the cement retarder at present, the cement yield in 2019 is 23.3 million tons, the cement retarder is required to be digested by 1.934 million tons, the titanium dioxide yield in 2019 is 310.4 ten thousand tons, the total amount of titanium gypsum with 50% of water produced in each year is 2483 million tons, the output amount of titanium gypsum is far less than the usage amount of cement enterprises, and the prerequisite condition of whether titanium gypsum can be used as the cement retarder is that the moisture content of gypsum is higher than or equal to 20%, and the moisture content is the only condition for determining titanium gypsum treatment.
Based on some problems that still exist above, the utility model discloses an acid waste water recycle apparatus for producing in sulfuric acid process titanium white production, specifically utilize the apparatus for producing of titanium gypsum dehydration production cement retarder in sulfuric acid process titanium white powder production process.
SUMMERY OF THE UTILITY MODEL
The not enough of prior art more than, the utility model provides an acid waste water recycle apparatus for producing in sulfuric acid process titanium dioxide production can realize titanium gypsum comprehensive utilization, has solved the titanium gypsum moisture height of present internal titanium white powder enterprise, and the problem that can't utilize is settled to the crystal form control and subsequent flocculation of crystal through neutralization process, adopts high-efficient titanium gypsum to squeeze the moisture that the sheet frame made the titanium gypsum and is less than or equal to 20%. Meanwhile, the iron content of the filtrate is controlled to be less than or equal to 2ppm in one step, so that the water quality is clear and transparent, and the requirements of up-to-standard discharge and production recycling are met.
In order to solve the above technical problem, the present invention solves the above technical problems.
The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid method comprises a lime silo, wherein a star-shaped feeder is arranged at an outlet of the lime silo, the lime silo is communicated to an inlet of a slurry melting tank through the star-shaped feeder, an outlet of the slurry melting tank is communicated to an inlet of a lime tank through a lime milk conveying pump, and an outlet of the lime tank is communicated to an inlet of a neutralization tank through a lime milk feeding pump; the neutralization tank is provided with an acidic wastewater inlet, a lime milk inlet, a circulating liquid inlet and a feed back port; a PH automatic detection control system pumping system is arranged at the top of the neutralization tank, is in signal communication with the lime milk feeding pump and controls the flow of the lime milk feeding pump; the acid waste water treatment device also comprises a regulating tank for containing acid waste water, wherein a liquid outlet of the regulating tank is communicated to the neutralizing tank through a neutralizing waste acid pump; an overflow port is arranged on the neutralization tank, the overflow port is communicated to a primary dall settling tank through a feeding pipe, a liquid outlet of the primary dall settling tank is communicated to an aeration tank, and a sludge discharge port of the primary dall settling tank is communicated to a sludge tank through a primary sludge discharge pump; a discharge port of the slurry tank is communicated to an inlet of the titanium gypsum pressing plate frame through a plate frame feed pump; the titanium gypsum pressing plate frame is matched with the titanium gypsum pressing plate frame, and a liquid outlet of the pressing water tank is communicated to a pressing water inlet on the titanium gypsum pressing plate frame through a pressing water pump; a filter cake storage hopper is arranged below the titanium gypsum pressing plate frame, a belt conveyor is arranged below a blanking port of the filter cake storage hopper, the belt conveyor conveys materials to a crusher, and a discharge port of the crusher is arranged above a retarder conveying belt; the filter liquor port on the titanium gypsum pressing plate frame is communicated to an aeration tank through a pipeline, an aeration pipe is arranged in the aeration tank, a liquor outlet on the aeration tank is communicated to a second-stage dall settling tank through a turbid liquor pump, a bottom sludge discharge port is arranged at the bottom of the second-stage dall settling tank, and the bottom sludge discharge port is communicated to an inlet of a first-stage dall settling tank through a second-stage slurry recycling pump.
The utility model provides a production device, utilize the speed that the in-process calcium sulfate precipitation generated in the control, and the crystallization rate of control crystallization process, make in and deposit out the better calcium sulfate dihydrate granule of waterlogging caused by excessive rainfall performance (titanium gypsum), it grows up to further flocculate of granule through adding the flocculating agent, under sheet frame feed pump high-pressure feed, get into the pressure filter, and make the pressure filter cavity whole be full of, rethread 10 Mpa's the water of squeezing carries out the tympanic membrane and squeezes, make the filter cake extrude the dehydration, the filter cake after the dehydration is hard, be the pie, unable direct utilization, carry out broken granulation back through the breaker and supply the cement factory and use. The dehydration process is carried out in stages, and the squeezing effect is achieved.
In a preferred embodiment, the outlet of the star-shaped feeder is communicated to the inlet of a metering screw, the outlet of the metering screw is communicated with the inlet of a slurry melting tank, and the metering screw is a metering screw machine and is used for simultaneously completing feeding and metering.
In a preferred embodiment, the slurry melting tank, the lime tank, the neutralization tank and the mud tank are respectively provided with a stirring device for stirring operation so as to fully perform the reaction.
In a preferred embodiment, the device further comprises an air floating fan, and an air pipe of the air floating fan extends into the neutralization tank and the aeration tank for aeration.
In a preferred embodiment, a flow meter is arranged at the outlet of the neutralization waste acid pump and used for recording the flow.
In a preferred embodiment, the neutralization tank is of a multi-stage series combination design.
In a preferred embodiment, a rotary rake type stirring mechanism is arranged in the primary dalton settling tank and the secondary dalton settling tank and is used for performing stirring operation so as to fully perform the reaction.
In a preferred embodiment, the device further comprises a primary sedimentation flocculant elevated tank, and the outlet of the primary sedimentation flocculant elevated tank is communicated to the primary dalton sedimentation tank for adding a flocculant.
In a preferred embodiment, the device further comprises a secondary sedimentation flocculant elevated tank, and an outlet of the secondary sedimentation flocculant elevated tank is communicated to the secondary dalton sedimentation tank for adding a flocculant.
Compared with the prior art, the utility model discloses following beneficial effect has: the acid wastewater recycling production device in the sulfuric acid process titanium dioxide production can realize the comprehensive utilization of titanium gypsum, solve the problem that the titanium gypsum in the domestic titanium dioxide enterprises is high in water content and cannot be utilized at present, control the crystal form of the crystals and subsequent flocculation and sedimentation in the neutralization process, and use the high-efficiency titanium gypsum pressing plate frame to enable the water content of the titanium gypsum to be less than or equal to 20%. Meanwhile, the iron content of the filtrate is controlled to be less than or equal to 2ppm in one step, so that the water quality is clear and transparent, and the requirements of up-to-standard discharge and production recycling are met.
Drawings
Fig. 1 is a schematic view of a production apparatus in the utility model.
Fig. 2 is an enlarged view of the area a in fig. 1.
Fig. 3 is an enlarged view of the region B in fig. 1.
Fig. 4 is an enlarged view of the region C in fig. 1.
Fig. 5 is an enlarged view of region D in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and are not construed as limiting the present invention, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
In the description of the present invention, it is to be understood that the term: the center, vertically, transversely, length, width, thickness, upper and lower, preceding, back, left and right, vertical, level, top, end, inside and outside, clockwise, anticlockwise etc. indicate position or positional relationship for based on the position or positional relationship that the drawing shows, just for the convenience of description the utility model discloses and simplified description, consequently can not be understood as the restriction of the utility model. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless explicitly stated or limited otherwise, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.
Referring to fig. 1 to 5, the utility model provides an acid waste water recycling production device in the production of titanium dioxide by a sulfuric acid process, including lime silo 1, the exit of lime silo 1 is equipped with star-shaped unloading ware 2, lime silo 1 communicates to the import of slurry tank 4 through this star-shaped unloading ware 2, the export of slurry tank 4 communicates to the import of lime tank 6 through lime cream delivery pump 5, the export of lime tank 6 communicates to the import of neutralization tank 8 through lime cream feed pump 7; the neutralization tank 8 is provided with an acidic wastewater inlet, a lime milk inlet, a circulating liquid inlet and a feed back port; a PH automatic detection control system material pumping system 10 is arranged at the top of the neutralization tank 8, the PH automatic detection control system material pumping system 10 is in signal communication with the lime milk feeding pump 7, and controls the flow of the lime milk feeding pump 7; the device also comprises a regulating tank 12 for accommodating the acidic wastewater, and a liquid outlet of the regulating tank 12 is communicated to the neutralizing tank 8 through a neutralizing wastewater acid pump 13; an overflow port is arranged on the neutralization tank 8 and communicated to a primary dall settling tank 15 through a feeding pipe, a liquid outlet of the primary dall settling tank 15 is communicated to an aeration tank 20, and a sludge discharge port of the primary dall settling tank 15 is communicated to a sludge tank 17 through a primary sludge discharge pump 16; the discharge hole of the slurry tank 17 is communicated to the inlet of a titanium gypsum pressing plate frame 19 through a plate frame feed pump 18; the titanium gypsum pressing plate frame 19 is matched with a pressing water tank 25, and a liquid outlet of the pressing water tank 25 is communicated to a pressing water inlet on the titanium gypsum pressing plate frame 19 through a pressing water pump 26; a filter cake storage hopper 27 is arranged below the titanium gypsum pressing plate frame 19, a belt conveyor 28 is arranged below a blanking port of the filter cake storage hopper 27, the belt conveyor 28 conveys materials to a crusher 29, and a discharging port of the crusher 29 is arranged above a retarder conveying belt 30; the filter liquor port on the titanium gypsum squeezing plate frame 19 is communicated to an aeration tank 20 through a pipeline, an aeration pipe is arranged in the aeration tank 20, a liquor outlet on the aeration tank 20 is communicated to a second-stage dall settling tank 24 through a turbid liquor pump 21, a bottom sludge discharge port is arranged at the bottom of the second-stage dall settling tank 24, and the bottom sludge discharge port is communicated to an inlet of a first-stage dall settling tank 15 through a second-stage mud recycling pump 23.
Specifically, the utility model discloses in, the export of glassware 2 under the star type communicates to the import of measurement spiral 3, the export of measurement spiral 3 is linked together with the import of changing dressing trough 4, and measurement spiral 3 is the measurement screw machine for accomplish pay-off and measurement simultaneously. And stirring devices are arranged in the slurrying tank 4, the lime tank 6, the neutralization tank 8 and the mud tank 17 and are used for implementing stirring operation so as to fully perform reaction. And a flow meter is arranged at the outlet of the neutralization waste acid pump 13 and used for recording the flow.
The production device in the application also comprises an air floating fan 11, and an air pipe of the air floating fan 11 extends into the neutralization tank 8 and the aeration tank 20 for aeration. The device also comprises a primary sedimentation flocculant elevated tank 14, wherein the outlet of the primary sedimentation flocculant elevated tank 14 is communicated to a primary dalton sedimentation tank 15 for adding a flocculant. The device also comprises a secondary sedimentation flocculant elevated tank 23, wherein the outlet of the secondary sedimentation flocculant elevated tank 23 is communicated to a secondary dalton sedimentation tank 24 for adding a flocculant
In this application, be equipped with gyration harrow formula rabbling mechanism in one-level dall subsider 15 with second grade dall subsider 24 for implement the stirring operation, make the reaction fully go on.
One embodiment in this application is as follows.
The production device in the embodiment comprises a lime silo 1, wherein an outlet of the lime silo 1 is connected with a star-shaped feeder 2, an outlet of the star-shaped feeder 2 is connected with an inlet of a metering screw 3, an outlet of the metering screw 3 is connected with an inlet of a lime slaking tank, a lime powder and lime slaking water metered by the metering screw 3 enter a lime slaking tank 4 in batches, stirring is arranged in the lime slaking tank 4, a liquid outlet is arranged in the lime slaking tank 4, lime milk filled with lime slaking slurry in the lime slaking tank 4 is connected with an inlet of a lime milk conveying pump 5 through the liquid outlet of the lime slaking tank 4, an outlet of the lime milk conveying pump 5 is connected with an inlet of a lime milk tank 6, a liquid outlet is arranged at the bottom of the lime milk tank 6 and is connected with an inlet of a lime milk feeding pump 7, an outlet of the lime milk feeding pump 7 is connected with an inlet of a neutralizing tank 8, an acidic wastewater inlet is arranged in the neutralizing tank 8, a lime milk inlet, a circulating liquid inlet is arranged on a circulating liquid inlet, and a material pumping system of a PH automatic detection control system, Feed back mouth etc, production acid waste water gets into equalizing basin 12, equalizing basin 12 is provided with the liquid outlet, the liquid outlet and 13 access connection of neutralizing waste water pump, 13 export of neutralizing waste acid pump and 8 acid waste water access connection of neutralizing tank, neutralizing waste water pump 13 adopts frequency conversion control, 13 exports of neutralizing waste water pump are provided with the flowmeter, it is stable to guarantee to intake with tank 8 through setting for the flow, 7 exports of lime cream feed pump are provided with automatic regulating valve, neutralizing tank 8 is provided with the stirring, frequency conversion control is adopted in the stirring, neutralizing tank top is provided with pH value automated inspection control system 10, it is chain with 7 export automatic control valve of lime cream feed pump through pH value automated inspection control system 10, the size of automatically regulated lime cream feeding, guarantee that the pH value is at the settlement within range.
The first-level dalle settling tank 15 is provided with a liquid outlet, the liquid outlet is connected with an inlet of the aeration tank 20, the first-level dalle settling tank 15 is provided with a sludge discharge port, the sludge discharge port is connected with an inlet of a first-level sludge discharge pump 16, an outlet of the first-level sludge discharge pump 16 is connected with an inlet of a sludge tank 17, the sludge tank 17 is provided with a discharge port, the discharge port of the sludge tank 17 is connected with an inlet of a plate frame feed pump 18, an outlet of the plate frame feed pump 18 is connected with an inlet of a titanium gypsum squeezing plate frame 19, an automatic control valve and a pressure transmitter are arranged at an inlet of the titanium gypsum squeezing plate frame 19 for controlling and displaying the feeding pressure of the plate frame 19, a squeezing water tank 25 is matched with the titanium gypsum squeezing plate frame 19, the squeezing water tank 25 is provided with a liquid outlet, the liquid outlet of the squeezing water tank 25 is connected with an inlet of a squeezing water pump 26, an outlet of the titanium gypsum squeezing plate frame 19 is connected with an inlet of the titanium gypsum squeezing water pump 19, the titanium gypsum squeezing plate frame 19 adopts a program-controlled filter press, the feeding pressure of the titanium gypsum squeezing plate frame 19 is automatically interlocked with the plate frame feed pump, the pump automatically stops when the pressure of the outlet of the pump reaches a set value, the feeding valve of the titanium gypsum pressing plate frame 19 is closed, the titanium gypsum pressing plate frame has a compressed air back blowing function, the outlet of the pressing pump 26 is provided with a pressure transmitter, the DCS automatically counts time after the pressure reaches the set value, the DCS performs pressing according to a preset program, and pre-pressing → primary pressing → pressure maintaining timing → secondary pressing → pressure maintaining → pressing is finished. After the squeezing is finished, the titanium gypsum squeezing plate frame 19 is subjected to automatic back blowing, loosening and piece unloading, the filter cake automatically falls down and enters the filter cake storage hopper 27, the materials in the filter cake storage hopper 27 enter the crusher 29 through the belt conveyor 28, the toothed rollers are arranged inside the crusher 29 to be crushed, the crushed materials are discharged from the bottom of the crusher 29 and enter the retarder conveying belt 30, and the retarder conveying belt 30 conveys the retarder to a retarder storehouse for selling; the filtrate of the titanium gypsum squeezing plate frame 19 enters an aeration tank 20, an aeration pipe is arranged in the aeration tank, the aeration tank is provided with a liquid outlet, the liquid outlet is connected with an inlet of a turbid liquid pump 21, an outlet of the turbid liquid pump 21 is connected with an inlet of a second-level Dalton settling tank 24, an electromagnetic flowmeter is arranged at an outlet of the turbid liquid pump, a liquid outlet is arranged in a second-level sedimentation flocculant elevated tank 23, the liquid outlet is provided with a flowmeter and an electric valve, the flowmeter is adjusted in flow proportion with the outlet of the turbid liquid pump, the second-level flocculant elevated outlet is connected with the inlet of the second-level Dalton settling tank 24, the second-level Dalton settling tank 24 is provided with a bottom sludge discharge port, the sludge discharge port is connected with an inlet of a second-level sludge recycling pump 23, an outlet of the second-level sludge recycling pump 23 is connected with an inlet pipe of a first-level Dalton settling tank 15, the sludge at the bottom of the second-level Dalton settling tank 24 is returned to the first-level Dalton settling tank 15 for settling and then concentration, the second-level Dalton settling tank 24 is provided with a clear liquid outlet, clear water at the clear liquid outlet is discharged into a water pool in the outer row, and part of clear water returns to the ash dissolving tank 4 to be used as ash dissolving water.
The slurry melting tank 4 is regulated by adopting a metering screw (ash inlet) 3 and the flow ratio of the inlet water (discharged reclaimed water for recycling) of the slurry melting tank, the concentration of the prepared lime milk is ensured to be within the range of 8-10%, a single dust remover is arranged at the top of the lime silo, the feeding smoothness of the lime tanker is ensured, and the dust content is ensured to be within the operation index range (the dust concentration is less than or equal to 10mg/m for transportation).
The neutralization tank 8 adopts a sectional neutralization and four-stage series mechanism, neutralization precipitation and crystal particle size control are realized in the neutralization tank 8, an online automatic PH value detection control system 10 and a DCS control program of automatic control valve linkage automatic adjustment of the outlet of the lime milk delivery pump 5 ensure that the neutralization PH value in each stage is in a designed range, a compressed air pipe is arranged in the neutralization tank 8, compressed air from an air floating fan 11 continuously blows into the neutralization tank 8, so that ferrous sulfate in the neutralization tank 8 is oxidized into ferric sulfate, the neutralization tank 8 adopts a four-stage series mode, materials are gradually backwards in the neutralization tank through overflow, when the materials enter the fourth-stage neutralization tank, gypsum particles (calcium sulfate dihydrate) grow to be in a particle size range required by design, and enter the first-stage daler settling tank 15 through an overflow port.
The first-stage dalwood settling tank 15 adopts a rotary rake type stirring structure, materials enter the settling tank from a central cylinder of the settling tank, are flocculated by a flocculating agent, and begin to settle naturally under the action of gravity, when the settled slurry reaches a certain height and the torque value of the settling tank reaches 200KN, the first-stage dredge pump 17 at the bottom is started, the first-stage dredge pump 17 adopts variable frequency control, the frequency is interlocked with the torque value of the first-stage dalwood settling tank 15, the set value of the torque value is controlled to be 150-200 KN,
the titanium gypsum squeezing plate frame 19 adopts a program-controlled filter press, the squeezing pressure can be 10Mpa at most, titanium gypsum slurry with certain crystal size generated in a neutralization tank is subjected to filter pressing dehydration until the solid content (solid content of dihydrate gypsum) is more than 80%, the free moisture is less than or equal to 20%, the material after the automatic cake unloading of the titanium gypsum squeezing plate frame 19 enters a filter cake storage hopper 27, a filter cake in the filter cake storage hopper 27 is conveyed to a crusher 29 through a belt conveyor 28, the crusher 29 is internally provided with counter teeth, the counter teeth are rotated in opposite directions at high speed under the driving of a motor, the filter cake is torn and crushed into particles with the particle size of less than or equal to 30mm, the discharge of the crusher 29 enters a retarder conveying belt 30, the particles are conveyed to a retarder storehouse through the retarder conveying belt 30 and are sold in a vehicle.
The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.
Claims (9)
1. The acid wastewater recycling production device in the titanium dioxide production by the sulfuric acid method is characterized by comprising a lime silo (1), wherein a star-shaped feeder (2) is arranged at an outlet of the lime silo (1), the lime silo (1) is communicated to an inlet of a slurrying tank (4) through the star-shaped feeder (2), an outlet of the slurrying tank (4) is communicated to an inlet of a lime tank (6) through a lime milk conveying pump (5), and an outlet of the lime tank (6) is communicated to an inlet of a neutralization tank (8) through a lime milk feeding pump (7);
the neutralizing tank (8) is provided with an acidic wastewater inlet, a lime milk inlet, a circulating liquid inlet and a feed back port; a PH automatic detection control system material pumping system (10) is arranged at the top of the neutralization tank (8), the PH automatic detection control system material pumping system (10) is in signal communication with the lime milk feeding pump (7), and controls the flow of the lime milk feeding pump (7);
the acid wastewater treatment device also comprises a regulating tank (12) for containing acid wastewater, wherein a liquid outlet of the regulating tank (12) is communicated to the neutralizing tank (8) through a neutralizing wastewater acid pump (13);
an overflow port is arranged on the neutralization tank (8), the overflow port is communicated to a primary dall settling tank (15) through a feeding pipe, a liquid outlet of the primary dall settling tank (15) is communicated to an aeration tank (20), and a sludge discharge port of the primary dall settling tank (15) is communicated to a sludge tank (17) through a primary sludge discharge pump (16); the discharge hole of the slurry tank (17) is communicated to the inlet of a titanium gypsum pressing plate frame (19) through a plate frame feeding pump (18);
the titanium gypsum pressing machine is characterized by also comprising a pressing water tank (25) matched with the titanium gypsum pressing plate frame (19), wherein a liquid outlet of the pressing water tank (25) is communicated to a pressing water inlet on the titanium gypsum pressing plate frame (19) through a pressing water pump (26);
a filter cake storage hopper (27) is arranged below the titanium gypsum pressing plate frame (19), a belt conveyor (28) is arranged below a blanking port of the filter cake storage hopper (27), the belt conveyor (28) conveys materials to a crusher (29), and a discharging port of the crusher (29) is arranged above a retarder conveying belt (30);
the filter liquor mouth on the titanium gypsum squeezing plate frame (19) communicates to aeration tank (20) through the pipeline, be equipped with the aeration pipe in aeration tank (20), the liquid outlet on aeration tank (20) communicates to second grade dalwood subsider (24) through turbid liquid pump (21), the bottom of second grade dalwood subsider (24) is equipped with the bottom mud discharging mouth, and this bottom mud discharging mouth communicates to the import of first grade dalwood subsider (15) through second grade mud retrieval and utilization pump (22).
2. The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid process according to claim 1, characterized in that the outlet of the star-shaped blanking device (2) is communicated to the inlet of the metering screw (3), and the outlet of the metering screw (3) is communicated with the inlet of the slurry tank (4).
3. The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid process according to claim 1, characterized in that stirring devices are arranged in the slurrying tank (4), the lime tank (6), the neutralization tank (8) and the mud tank (17).
4. The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid process according to claim 1, characterized by further comprising an air floating fan (11), wherein an air pipe of the air floating fan (11) extends into the neutralization tank (8) and the aeration tank (20) for aeration.
5. The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid process according to claim 1, characterized in that a flow meter is arranged at the outlet of the neutralization waste acid pump (13).
6. The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid process according to claim 1, characterized in that the neutralization tank (8) is designed in a multistage series combination manner.
7. The device for recycling acid wastewater in the production of titanium dioxide by a sulfuric acid process according to claim 1, wherein a rotary rake type stirring mechanism is arranged in the primary dalle settling tank (15) and the secondary dalle settling tank (24).
8. The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid process according to claim 1, characterized by further comprising a primary sedimentation flocculant elevated tank (14), wherein the outlet of the primary sedimentation flocculant elevated tank (14) is communicated to the primary dalton sedimentation tank (15).
9. The acid wastewater recycling production device in the production of titanium dioxide by a sulfuric acid process according to claim 1, characterized by further comprising a secondary sedimentation flocculant elevated tank (23), wherein the outlet of the secondary sedimentation flocculant elevated tank (23) is communicated to the secondary dalton sedimentation tank (24).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115784410A (en) * | 2023-01-06 | 2023-03-14 | 东营市博文环保科技有限公司 | Acid sewage treatment equipment for treating hazardous waste by chemical method |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115784410A (en) * | 2023-01-06 | 2023-03-14 | 东营市博文环保科技有限公司 | Acid sewage treatment equipment for treating hazardous waste by chemical method |
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