CN118063053A - Wastewater recycling treatment device and treatment method for silicon carbide micro powder - Google Patents
Wastewater recycling treatment device and treatment method for silicon carbide micro powder Download PDFInfo
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- CN118063053A CN118063053A CN202410494142.1A CN202410494142A CN118063053A CN 118063053 A CN118063053 A CN 118063053A CN 202410494142 A CN202410494142 A CN 202410494142A CN 118063053 A CN118063053 A CN 118063053A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 57
- 238000004064 recycling Methods 0.000 title claims abstract description 32
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 181
- 238000000926 separation method Methods 0.000 claims abstract description 49
- 238000004062 sedimentation Methods 0.000 claims abstract description 29
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 48
- 239000002245 particle Substances 0.000 claims description 40
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 38
- 238000005188 flotation Methods 0.000 claims description 36
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Abstract
The invention provides a wastewater recycling device and a wastewater recycling method for silicon carbide micro powder, which relate to the technical field of wastewater recycling devices and comprise the following steps of; the cyclone separation device is integrally of a cylindrical structure; one end of the froth flotation device is communicated with the cyclone separation device stationary phase; the spiral propelling and conveying device is communicated with the froth flotation device; the multistage sedimentation treatment is connected with the spiral propulsion conveying device; the invention realizes the efficient separation and cyclic utilization of pollutants, reduces the use amount of chemical agents and fillers, improves the residence time of wastewater in a system, strengthens the solid-liquid separation effect, and remarkably improves the cyclic utilization rate of water resources and the stability of system operation; solves the problems of difficult efficient separation and recovery of the micro powder, high energy consumption, poor treatment effect, low wastewater recycling rate and the like of the existing treatment device in the recycling treatment of the silicon carbide micro powder wastewater.
Description
Technical Field
The invention relates to the technical field of wastewater recycling treatment devices, in particular to a wastewater recycling treatment device and a wastewater recycling treatment method for silicon carbide micro powder.
Background
In the production process of silicon carbide micro powder which is a basic raw material in the industries of refractory materials, abrasive materials and photovoltaics, the cutting fluid of silicon carbide sewage has large water consumption and more suspended matters, mainly contains pollutants such as metal ions and polyethylene glycol, and needs to be treated for recycling or standard discharge so as to prevent the damage to the environment and the health of a human body, and the problems that the micro powder existing in the recycling treatment of the silicon carbide micro powder wastewater is difficult to separate and recycle efficiently, the energy consumption of the existing treatment device is high, the treatment effect is poor, the recycling rate of the wastewater is low and the like are solved.
Disclosure of Invention
In order to solve the above technical problems, an embodiment of the present invention provides a wastewater recycling device for silicon carbide micro powder, including: cyclone separation device, foam flotation device, spiral propulsion and conveying device and multistage sedimentation treatment;
The cyclone separating device is of a cylindrical structure as a whole; one end of the froth flotation device is communicated with the cyclone separation device stationary phase; the spiral propelling and conveying device is communicated with the froth flotation device; the multistage sedimentation treatment is connected with the spiral propulsion conveying device and the cyclone separation device; the cyclone separation device comprises: the device comprises a first cyclone, a stirring hopper, a second cyclone and a buffer hopper; one end of the first cyclone is communicated with the stirring hopper; the second cyclone is communicated with the first cyclone through a stirring hopper; the buffer hopper is communicated with the second cyclone; the screw propulsion conveying device comprises: a pump housing and a rotor assembly; the pump shell is of a single-stage single-suction structure, the inner wall of the pump shell is designed into an involute flow passage, the sectional area of the flow passage is gradually increased from an inlet to an outlet, and an annular space formed by the flow passage and the rotor is gradually increased from front to back; the rotor component is arranged inside the pump shell; the multistage precipitation treatment comprises: the device comprises a conical sedimentation device, an inclined tube precipitator, a sand filter, a concentrated water treatment device and a concentrated water closed-circuit treatment device; the conical sedimentation device is communicated with the inclined tube precipitator; the sand filter is communicated with the inclined tube precipitator; the concentrated water treatment device is communicated with the cyclone separation device, the inclined tube precipitator and the sand filter; the concentrated water closed-circuit treatment device is connected with the concentrated water treatment device, and the concentrated water closed-circuit treatment device is communicated with the spiral propelling and conveying device.
As a specific embodiment, the first cyclone further comprises: the cyclone cylinder, the feeding port, the guide plate and the communicating pipe; the surface of the cyclone cylinder is communicated with the stationary phase of the feeding port; the guide plate is fixedly arranged in the feeding port; one end of the communicating pipe is communicated with the stationary phase of the feeding port, and the other end of the communicating pipe is connected with the adjustable centrifugal pump.
As a specific embodiment, the stirring hopper further comprises: the device comprises a water outlet through pipe, a bearing bucket and a stirring rod; the number of the water outlet through pipes is two, and the bearing bucket is communicated with the first cyclone and the second cyclone through the water outlet through pipes; the puddler is installed in bearing the weight of the bucket inside, and the puddler paddle adopts positive and negative twin screw leaf, and positive screw paddle and counter screw She Jiaocuo are arranged.
As a specific embodiment, the froth flotation device comprises: the device comprises a flotation bearing column, a perforated pipe, a discharge hopper, an active agent feeding port, a baffle plate and an adjusting baffle plate; the bottom of the floatation bearing column is of a cylindrical structure, the top of the floatation bearing column is of a conical structure, and the floatation bearing column is communicated with the buffer hopper; micropores are formed in the top surface of the perforated pipe, one end of the perforated pipe is connected with the air compressor, and the other end of the perforated pipe is inserted into the flotation bearing column; the top of the discharge hopper is connected with the flotation bearing column, and a slag discharge valve is arranged at the bottom of the discharge hopper; the active agent adding port is inserted into the flotation bearing column; the baffle plates are adjacently arranged in a staggered way to form a zigzag channel; the adjusting baffle is slidably arranged at the top of the floatation bearing column.
As a specific embodiment, the rotor assembly further comprises: a rotor spindle, a helical blade and an end cap; the rotor main shaft adopts a variable diameter design, the front end is small in diameter, the rear end is large in diameter, two ends are connected through a conical transition section, and the rotor main shaft is rotatably arranged in the pump shell; the spiral blade adopts a trapezoid cross section design, the rotor main shaft and the spiral blade adopt an integrated design, the blades are spirally wound on the surface of the main shaft at equal intervals, and the front and rear sections of the pitch of the rotor are connected through a gradual transition section; the end cover adopts a conical design, the cone angles are respectively matched with the cone angles of the front section and the rear section of the rotor spindle, the center of the front side of the end cover is provided with a through hole with the diameter being the diameter of the rotor spindle, the rear end of the center spindle of the rear side of the end cover is connected by adopting a flange, and a key groove is arranged to transmit torque.
As a specific embodiment, the conical precipitation device further comprises: the device comprises a conical tank body, a screening structure, a rotary mud scraper and a pneumatic sloping plate pump; the conical tank body is of a conical structure; the screening structure is arranged in the conical tank body and is arranged in a multistage manner; the rotary mud scraper is arranged in the conical tank body; the pneumatic swash plate pump is in communication with the cone Chi Tixiang.
As a specific embodiment, the inclined tube settler further comprises: the water inlet area, the inclined area and the water outlet area; the water inlet area is designed into a round shape, and water flow is uniformly introduced by four water inlet pipes which are vertically arranged; the inclined tube area is filled with regular hexagonal honeycomb inclined tubes; the water outlet area is of an annular overflow weir structure and is divided into an inner weir and an outer weir.
As a specific embodiment, the sand filter further comprises: the device comprises an outer barrel, a filtering layer, a water inlet pipe, a vertical pipe, a water distribution disc, a flower pipe, a water collecting disc and a water outlet pipe; the top of the outer cylinder is provided with a backwash water pipe and a compressed air pipe, the filter layer is arranged in the outer cylinder, and the filter layer adopts two layers of filter materials of active carbon/quartz sand; the water inlet pipe is arranged in the middle of the inner part of the outer cylinder and is communicated with the inclined tube precipitator; the top of the vertical pipe is connected with the water inlet pipe, and the bottom of the vertical pipe is inserted into the filter layer; the water distribution plate is communicated with the vertical pipe, the water distribution plate is of a fan-shaped structure, and the periphery of the water distribution plate is provided with horizontal slits; the flower pipe adopts a round hole flower pipe, and the flower pipe is inserted into the filter layer; the flower pipe is communicated with the water collecting disc, the top of the water collecting disc is contacted with the filter layer supporting layer, and the bottom of the water collecting disc is fixedly connected with the outer cylinder.
As a specific embodiment, the concentrated water treatment apparatus further includes: a concentrated water collection tank and an activated carbon filter; a stirrer is arranged in the concentrated water collecting tank to keep the concentrated water in the tank in a suspended state, and mud water discharged by the inclined tube precipitator, underflow of the cyclone separation device and backwash wastewater of the sand filter are collected into the concentrated water collecting tank; the concentrated water collecting tank is communicated with the activated carbon filter through a lifting pump.
The application also discloses a wastewater recycling method of the silicon carbide micro powder, which is based on the wastewater recycling device of the silicon carbide micro powder, and comprises the following steps:
S1, conveying wastewater into a cyclone separation device and a foam flotation device through a feeding port, firstly entering a first cyclone, forming high-speed rotating flow in the device, moving larger particles to a wall surface under the action of centrifugal force, discharging the larger particles from a bottom flow port, and enabling the finer particles to enter an overflow port along with rising flow;
S2, overflowing the first cyclone into a stirring hopper, fully mixing under the action of a stirring rod, preventing particles from depositing, enabling the material of the bearing hopper to enter the second cyclone under the action of gravity, and performing cyclone separation again for further classification;
S3, fine particle materials discharged from an overflow port of the second cyclone enter a buffer hopper, the flow is controlled by a regulating valve to uniformly enter a foam flotation device, wastewater slowly flows upwards from a baffle plate and fully contacts with fine bubbles from bottom to top in a flotation bearing column, hydrophobic micro powder is adsorbed on the surface of the bubbles under the action of a surfactant, rises to the liquid level along with foam and is scraped and collected into a foam launder, and recovery of foam products is realized;
s4, collecting the mineralized matters which are not captured at the bottom of the floatation carrying column in a discharge hopper, periodically discharging the mineralized matters through a slag discharge valve, conveying the mineralized matters to a filter press for dehydration, overflowing the upper part of the floatation carrying column into a water tank, and enabling the mineralized matters to enter a next treatment unit along with tail water;
S5, enabling tail water to enter a spiral propulsion conveying device, enabling particles to collide and rub with each other under the action of composite force of pushing, extruding and pressing in a pump, and realizing flocculation in the pumping process;
s6, discharging materials of the spiral propulsion conveying device enter a conical sedimentation device, rapidly settling under the action of gravity, intercepting mineralized materials of different particle sizes by layers of a multi-stage screening structure, respectively collecting the mineralized materials, collecting sediments at the bottom of a tank to the center under the slow scraping and collecting of a rotary mud scraper, and conveying the sediments to a filter press for dehydration by a pneumatic inclined plate pump;
s7, overflowing the conical sedimentation device into an inclined tube precipitator, fully contacting with honeycomb filler in an inclined tube, intercepting particles, further clarifying effluent, collecting precipitated effluent through a water tank, and then entering a sand filter;
S8, after water inflow of the sand filter is uniformly distributed through the water distribution disc, the water inflow passes through the quartz sand layer and the cobble supporting layer in the filter layer from top to bottom in sequence, and residual fine particle impurities are trapped, so that the water quality of the water outflow is ensured;
S9, the water discharged from the sand filter is divided into two paths, wherein one path is reused for production, the other path is reused after being desalted by a reverse osmosis device, and concentrated water is treated by an active carbon filter and then flows back to a separation section of a cyclone separation device, so that closed cycle of water is realized;
S10, the activated carbon filter is regenerated by a hot alkali regeneration process at regular intervals, the saturated activated carbon is regenerated in a high-temperature alkali liquor environment, the regenerated activated carbon filter is returned to be used continuously, and the regenerated waste alkali liquor is returned to the spiral propulsion conveying device to be mixed with other waste water for treatment.
The invention has the following beneficial effects:
The technical scheme of the invention solves the technical problems of strong dispersibility of fine particles, poor flocculation sedimentation, low conventional treatment efficiency and the like, and finally realizes standard discharge of wastewater, reduction of pollutants, cascade utilization of water sources and intelligent optimization control of a system.
Firstly, a cyclone separation device and a foam flotation coupling process are introduced in a pretreatment stage, the grading separation of particles is realized by utilizing the difference of two-stage cone angles, the mixing and dispersion are enhanced through an intermediate hopper, the retention time is prolonged through a baffle plate, the bubble trapping is enhanced through an annular perforated pipe, the problem of difficult separation of silicon carbide micro powder is effectively solved, and the preliminary removal of pollutants and the pre-enrichment of valuable components are realized.
Secondly, a spiral propulsion conveying device with a variable pitch structure is adopted, axial thrust and centrifugal force gradient distribution is formed in a pump by utilizing a special main shaft and blade design, particle collision is reinforced by the composite acting force of pushing, extruding and pressing, the flocculation difficulty of silicon carbide wastewater is overcome, high-efficiency aggregation of particles is realized without adding a medicament, and the subsequent solid-liquid separation efficiency is greatly improved.
In addition, a combined process of a conical precipitation device, an inclined tube precipitator and a sand filter is designed, and optimization measures such as a multistage screening structure, a conical hopper mud scraping and the like are adopted to strengthen the solid-liquid separation and slag discharge performance of the conical precipitation device; the organic combination of the fractional precipitation and the precise filtration realizes the deep purification of the wastewater and the stable water quality reaching the standard.
Meanwhile, the multistage water quality allocation and the introduction of the concentrated water closed-circuit treatment device realize the stepwise utilization of a water source through the 'quality-dividing treatment and the graded utilization' of the wastewater, so that the fresh water consumption and the pollutant emission are reduced to the greatest extent; the application of the hot alkali regeneration process effectively solves the problems of the deactivation and secondary pollution of the adsorbent, and realizes the repeated recycling of the activated carbon.
In summary, the embodiment of the disclosure relates to a wastewater circulation treatment device and a treatment method for silicon carbide micro powder, the scheme fully utilizes the speed difference inside a cyclone separation device, the buoyancy effect of bubbles in a foam flotation device, the axial thrust and centrifugal force gradient of a spiral propulsion conveying device, the gravity sedimentation and overflow layering of a conical sedimentation device, the inertia force of a pipe chute precipitator, the combined effect of various structural forces such as filler blocking and the like, and finally realizes the efficient separation and cyclic utilization of pollutants.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
The drawings described below are only for illustration of some embodiments of the invention and are not intended to limit the invention.
In the drawings:
FIG. 1 shows a schematic diagram of the wastewater recycling treatment flow chart of the present invention;
FIG. 2 shows a schematic axial side view of the cyclone separator of the present invention;
FIG. 3 shows an exploded schematic view of the first cyclone of the present invention;
FIG. 4 shows a schematic cross-sectional structural view of the stirring hopper of the present invention;
Figure 5 shows a schematic cross-sectional structural view of a froth flotation device of the present invention;
FIG. 6 shows a schematic structural view of a multistage precipitation process section of the present invention;
Fig. 7 shows a schematic side view of the sand filter of the present invention.
List of reference numerals
1. A cyclone separation device; 101. a first cyclone; 1011. a swirl pot; 1012. a feed port; 1013. a deflector; 1014. a communicating pipe; 102. a stirring hopper; 1021. a water outlet pipe; 1022. a carrying bucket; 1023. a stirring rod; 103. a second cyclone; 104. a buffer hopper; 2. a froth flotation device; 201. a flotation bearing column; 202. perforating the pipe; 203. a discharge hopper; 204. an active agent adding port; 205. a baffle plate; 206. adjusting a baffle; 3. a screw propulsion conveyor; 301. a pump housing; 302. a rotor assembly; 3021. a rotor spindle; 3022. a helical blade; 3023. an end cap; 4. multistage precipitation treatment; 401. a conical sedimentation device; 4011. a conical tank body; 4012. a screening structure; 4013. a rotary mud scraper; 4014. pneumatic swash plate pump; 402. a tube settler; 4021. a water inlet area; 4022. an inclined tube region; 4023 a water outlet zone; 403. a sand filter; 4031. an outer cylinder; 4032. a filter layer; 4033. a water inlet pipe; 4034. a riser; 4035. a water distribution plate; 4036. a flower tube; 4037. a water collecting tray; 4038. a water outlet pipe; 404. a dense water treatment device; 4041. a concentrated water collecting tank; 4042. an activated carbon filter; 405. concentrated water closed-circuit treatment device.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples.
Examples: please refer to fig. 1 to 7:
The invention provides a wastewater recycling device for silicon carbide micro powder, which comprises: a cyclone separation device 1, a froth flotation device 2, a spiral propulsion conveying device 3 and a multistage sedimentation treatment 4;
The cyclone separation device 1 is of a cylindrical structure as a whole; one end of the froth flotation device 2 is communicated with the stationary phase of the cyclone separation device 1; the spiral propelling and conveying device 3 is communicated with the froth flotation device 2; the multistage sedimentation treatment 4 is connected with the spiral propulsion conveying device 3; the cyclonic separating apparatus 1 comprises: a first cyclone 101, a stirring hopper 102, a second cyclone 103 and a buffer hopper 104; one end of the first cyclone 101 is communicated with the stirring hopper 102; the second cyclone 103 is communicated with the first cyclone 101 through the stirring hopper 102; the buffer hopper 104 is communicated with the second cyclone 103, a flow control valve is arranged at the bottom of the buffer hopper 104, and the feeding flow entering the flotation bearing column 201 is controlled by adjusting the opening of the valve, so that flexible connection and balanced feeding are realized; the screw conveyor 3 includes: a pump housing 301 and a rotor assembly 302; the pump shell 301 is of a single-stage single-suction structure, the inner wall of the pump shell 301 is designed into an involute flow channel, the sectional area of the flow channel is gradually increased from an inlet to an outlet, the annular space formed by the pump shell 301 and the rotor assembly 302 is gradually increased from front to back, and the space configuration of the flow channel of the pump shell 301 can reduce the liquid flow resistance and the energy consumption; when the suspension enters from the inlet of the pump shell 301, the suspension presents spiral motion in the pump shell 301 under the combined action of the flow channel of the pump shell 301 and the spiral blades 3022; because the front end pitch of the rotor main shaft 3021 is small and the rear end pitch is large, the liquid flow velocity forms differential distribution in the axial direction; because the pitch of the rear section is larger than that of the front section, the axial propelling speed of the liquid at the rear section is higher at the same rotating speed, and a thrust gradient from front to back is formed; because rotor spindle 3021 is smaller in front and larger in back, the radius of rotation of the liquid at the back stage is larger, and a centrifugal force gradient from front to back is formed; under the dual actions of axial thrust and centrifugal force, suspended particles sequentially undergo a pushing and extruding process from front to back, wherein the front-section pitch is small, the axial thrust is small, and the particles are extruded to be more than the pushing action; under the action of the composite force of pushing and extruding, the frequency and the intensity of mutual collision and friction of the particles are greatly improved, so that flocculation and aggregation of the particles are promoted; meanwhile, the concentration of particles in the pump shell 301 gradually increases from front to back, thereby creating favorable conditions for particle aggregation; rotor assembly 302 is mounted inside pump housing 301; the multistage precipitation process 4 includes: a conical sedimentation device 401, an inclined tube precipitator 402, a sand filter 403, a concentrated water treatment device 404 and a concentrated water closed circuit treatment device 405; the conical sedimentation device 401 is communicated with the inclined tube precipitator 402; the sand filter 403 is communicated with the inclined tube precipitator 402; the concentrated water treatment device 404 is communicated with the cyclone separation device 1, the inclined tube precipitator 402 and the sand filter 403; the concentrated water closed-circuit treatment device 405 is connected with the concentrated water treatment device 404, the concentrated water closed-circuit treatment device 405 is communicated with the spiral propulsion and conveying device 3, high-concentration alkali liquor generated in the active carbon regeneration process is conveyed into the spiral propulsion and conveying device 3 through a pipeline after being collected and is treated together with other waste water, and the concentrated water closed-circuit treatment device 405 comprises the following equipment: the saturated active carbon is sent to the top of the regeneration tower through a lifter, hot air and alkali liquor pass through a packing layer from bottom to top to be in countercurrent contact with the active carbon, organic matters adsorbed on the surface of the active carbon are decomposed and oxidized under the high temperature of 850 ℃ and strong alkali environment, pores are dredged, and the activity is recovered, and cooling the regenerated tail gas by a heat exchanger, and purifying and discharging the regenerated tail gas reaching the standard by a bag-type dust remover.
As shown in fig. 3, the first cyclone 101 further includes: swirl cylinder 1011, feed port 1012, baffle 1013 and communicating pipe 1014; the surface of the cyclone cylinder 1011 is communicated with the stationary phase of the feeding port 1012, the cone angle of the cyclone cylinder 1011 in the first cyclone 101 is designed to be 20 degrees, the cone angle of the cyclone cylinder 1011 of the second cyclone 103 is designed to be 15 degrees, and the differential design of two-stage cone angles utilizes the influence of a cyclone structure on the separation effect to realize the stage classification of coarse and fine particles; the deflector 1013 is fixedly installed inside the feeding port 1012, and the deflector 1013 is installed at an angle of 45 degrees, so that the feeding material forms stable spiral downward rotating flow in the first cyclone 101, and the centrifugal separation effect is enhanced; one end of the communicating pipe 1014 is connected with the stationary phase of the feeding port 1012, and the other end of the communicating pipe 1014 is connected with an adjustable centrifugal pump, so that the feeding pressure and flow rate can be flexibly controlled.
As shown in fig. 4, the stirring hopper 102 further includes: the water outlet pipe 1021, the bearing bucket 1022 and the stirring rod 1023; the number of the water outlet pipes 1021 is two, and the bearing bucket 1022 is communicated with the first cyclone 101 and the second cyclone 103 through the water outlet pipes 1021; the puddler 1023 is installed in bearing bucket 1022 inside, and puddler 1023 paddle adopts positive and negative twin screw leaf, and positive screw paddle and counter screw She Jiaocuo arrange, and in the material transportation process, positive screw paddle promotes the material forward motion, and counter screw leaf is back-fed with the material, increases the dwell time of material in the hopper, makes the material obtain intensive mixing, improves the dispersion effect, creates the advantage for the second grade separation.
As shown in fig. 5, the froth flotation device 2 includes: a flotation bearing column 201, a perforated pipe 202, a discharge hopper 203, an active agent feeding port 204, a baffle plate 205 and an adjusting baffle plate 206; the bottom of the floatation bearing column 201 is of a cylindrical structure, the top of the floatation bearing column 201 is of a conical structure, and the floatation bearing column 201 is communicated with the buffer hopper 104; micropores are formed in the top surface of the perforated pipe 202, tiny bubbles generated by the micropores are uniform in particle size, so that mineralized particles can be fully trapped, one end of the perforated pipe 202 is connected with an air compressor, and the other end of the perforated pipe 202 is inserted into the flotation bearing column 201; the top of the discharge hopper 203 is connected with the flotation bearing column 201, a slag discharge valve is arranged at the bottom of the discharge hopper 203, particles which are not captured in the wastewater are collected in the discharge hopper 203, the particles are periodically discharged through the slag discharge valve, and the discharged waste residues enter a filter press to dehydrate mud cakes; the active agent adding port 204 is inserted into the flotation supporting column 201, and the active agent adding port 204 can disperse the surfactant by utilizing the tangential speed of the wastewater so as to promote the adsorption of hydrophobic mineral particles on the surfaces of bubbles; the baffle plates 205 are adjacently arranged in a staggered manner to form a zigzag channel, when the wastewater flows in the channel, the flowing direction is continuously changed, the effective residence time of the wastewater in the column is prolonged, and the mineralized material is promoted to fully contact with bubbles; the adjusting baffle 206 is slidably mounted at the top of the flotation bearing column 201, the conical foam collection cover is arranged at the top of the flotation bearing column 201, foam enters the foam launder after being collected by the collection cover, the adjusting baffle 206 is arranged at the end of the launder, the thickness of the foam layer is controlled by adjusting the height of the baffle 206, minerals in the foam layer are fully enriched, and the enriched foam overflows from the tail end of the launder and enters the subsequent dehydration treatment procedure.
As shown in fig. 1, rotor assembly 302 further includes: a rotor main shaft 3021, a helical blade 3022, and an end cap 3023; the rotor main shaft 3021 is designed to have a variable diameter, the front end is small in diameter, the rear end is large in diameter, two ends are connected through a conical transition section, and the rotor main shaft 3021 is rotatably arranged in the pump shell 301; the spiral blade 3022 is of a trapezoid cross section design, the rotor main shaft 3021 and the spiral blade 3022 are of an integrated design, the blades are spirally wound on the surface of the main shaft at equal intervals, the screw pitch at the front end of the rotor is 50mm, the screw pitch at the rear end of the rotor is 80mm, the two screw pitches are connected through a gradual transition section, the length of the transition section is 1/4 of the total length of the rotor, and the differential design of the screw pitches of the front blade and the rear blade is a key for forming axial thrust and centrifugal force gradient distribution; the end cover 3023 is in a conical design, the cone angles are respectively matched with the cone angles of the front section and the rear section of the rotor main shaft 3021, a through hole with the diameter equal to that of the rotor main shaft 3021 is formed in the center of the front side of the end cover 3023, the rear end of the center main shaft of the rear side of the end cover 3023 is connected through a flange, and a key groove is formed to transmit torque.
As shown in fig. 6, the conical settling device 401 further includes: a conical tank 4011, a screening structure 4012, a rotary mud scraper 4013 and a pneumatic inclined plate pump 4014; the conical tank body 4011 is of a conical structure, the cone angle of the conical tank body 4011 is designed to be 60 degrees, the conical structure can increase the area of the tank bottom, the sliding time of mud residues in the conical body is prolonged, the mud residues are guaranteed to be sufficiently compacted for a sufficient time, and therefore the sedimentation effect is improved; the screening structure 4012 is arranged in the conical tank body 4011, the whole screening structure 4012 is an annular overflow weir structure, the screening structure 4012 adopts multistage arrangement, the vertical distance between the screening structures 4012 at different levels is 1m, the high-level screening structure 4012 collects large particles with high sedimentation velocity, and the low-level screening structure 4012 collects small particles with low sedimentation velocity; the rotary mud scraper 4013 is arranged inside the conical tank body 4011, and the rotary mud scraper 4013 is used for cleaning mud on the inner wall of the conical tank body 4011; the pneumatic swash plate pump 4014 is connected to the tapered tank 4011, and the pneumatic swash plate pump 4014 delivers sludge into the filter press.
As shown in fig. 1, the inclined tube settler 402 further comprises: a water inlet region 4021, a sloped tube region 4022, and a water outlet region 4023; the water inlet area 4021 is designed into a circular shape, and water flow is uniformly introduced by four water inlet pipes which are vertically arranged; the inclined tube area 4022 is filled with regular hexagonal honeycomb inclined tubes, the feed liquid slowly flows in a laminar flow state in the inclined tubes in the inclined tube area 4022, and an included angle of 60 degrees is formed between the direction and the tube axis, so that the flow path of the liquid is prolonged, disturbance of the liquid on sediment is reduced, and the honeycomb filler has the characteristics of large specific surface area and high sedimentation efficiency, and can promote rapid sedimentation of mineralized flocs; the water outlet area 4023 is an annular overflow weir structure, the annular overflow weir is divided into an inner weir and an outer weir, the inner weir is 50mm higher than the outer weir, the water outlet overflows into an annular water tank from the inner weir, overflows into a corresponding water tank through the outer weir, the floc structure can be destroyed by the fall formed by the height difference, adsorbed water is released, and the water outlet clarity is further improved.
As shown in fig. 7, the sand filter 403 further includes: outer cylinder 4031, filter layer 4032, water inlet pipe 4033, vertical pipe 4034, water distribution disk 4035, flower pipe 4036, water collection disk 4037 and water outlet pipe 4038; the top of the outer cylinder 4031 is provided with a back flush water pipe and a compressed air pipe, the back flush water pipe is connected with a tap water pipe network, the pipe diameter is 50mm, an electric valve is arranged, the compressed air pipe is connected with an air compressor, the pipe diameter is 25mm, an electromagnetic valve and a pressure gauge are arranged, a sand discharge pipe is arranged at the bottom of the tank, the pipe diameter is 100mm, the tank is connected with the electric mud discharge valve, the back flush period is determined according to the water quality of the discharged water and the water head loss, generally 24-48 hours, when back flush is carried out, a water inlet valve is closed, a back flush water valve and the mud discharge valve are opened, the back flush water passes through a filter material layer from top to bottom, the back flush water valve is closed, the compressed air valve is opened, 0.2-0.3 mpa of compressed air is introduced for 2-3 minutes, the expansion of the filter material layer is loosened, mutual friction is carried out, the attached pollutants are fully removed, the residual pressure is finally removed, and the filter is emptied, and the back flush is completed; the filter layer 4032 is arranged in the outer barrel 4031, and the filter layer 4032 adopts two layers of filter materials of active carbon/quartz sand; a water inlet pipe 4033 is arranged in the middle of the inside of the outer cylinder 4031, and the water inlet pipe 4033 is communicated with the inclined tube precipitator 402; the top of the vertical pipe 4034 is connected with the water inlet pipe 4033, and the bottom of the vertical pipe 4034 is inserted into the filter layer 4032; the water distribution disk 4035 is communicated with the vertical pipe 4034, the water distribution disk 4035 is of a fan-shaped structure, and the periphery of the water distribution disk 4035 is provided with horizontal slits; the flower tube 4036 adopts a round hole flower tube, and the flower tube 4036 is inserted into the filter layer 4032; the flower tube 4036 is communicated with the water collecting tray 4037, the top of the water collecting tray 4037 is contacted with the supporting layer of the filter layer 4032, and the bottom of the water collecting tray is fixedly connected with the outer barrel 4031.
As shown in fig. 1, the concentrate treatment device 404 further includes: a concentrate water collection tank 4041 and an activated carbon filter 4042; a stirrer is arranged in the concentrated water collecting tank 4041 to keep the concentrated water in the tank in a suspended state, and sludge water discharged by the inclined tube precipitator 402, underflow of the cyclone separation device 1 and backwash wastewater of the sand filter 403 are collected into the concentrated water collecting tank 4041; the concentrated water collection tank 4041 is connected to the activated carbon filter 4042 by a lift pump.
In an embodiment of the disclosure, a method for circularly treating wastewater of silicon carbide micro powder includes: s1, wastewater is conveyed into a cyclone separation device 1 and a foam flotation device 2 through a feeding port 1012, firstly enters a first cyclone 101, forms high-speed rotating flow in the device, moves towards a wall surface under the action of centrifugal force, is discharged from a bottom flow port, and enters an overflow port along with rising flow; s2, overflowing the first cyclone 101 into a stirring hopper 102, fully mixing under the action of a stirring rod 1023, preventing particles from depositing, enabling the material of a bearing hopper 1022 to enter a second cyclone 103 under the action of gravity, and performing cyclone separation again for further classification; s3, fine particle materials discharged from an overflow port of the second cyclone 103 enter a buffer hopper 104, flow is controlled by adjusting a valve to uniformly enter a foam flotation device 2, wastewater slowly flows upwards from a baffle plate 205 in a flotation bearing column 201 and fully contacts with tiny bubbles from bottom to top, hydrophobic micro powder is adsorbed on the surface of the bubbles under the action of a surfactant, rises to a liquid level along with the foam and is scraped and collected into a foam launder, and recovery of foam products is realized; s4, collecting the mineralized matters which are not captured at the bottom of the flotation bearing column 201 in a discharge hopper 203, periodically discharging the mineralized matters through a slag discharge valve, conveying the mineralized matters to a filter press for dehydration, overflowing the upper part of the flotation bearing column 201 into a water tank, and enabling the mineralized matters to enter a next treatment unit along with tail water; s5, enabling tail water to enter the spiral propulsion conveying device 3, enabling particles to collide and rub with each other under the action of composite force of pushing, extruding and pressing in a pump, and realizing flocculation in the pumping process; s6, discharging materials of the spiral propulsion conveying device 3, entering a conical sedimentation device 401, rapidly settling under the action of gravity, intercepting mineralized materials with different particle sizes by layers through a multi-stage screening structure 4012, respectively collecting the mineralized materials, collecting sediment at the bottom of the tank to the center under the slow scraping and collecting of a rotary mud scraper 4013, and conveying the sediment to a filter press for dehydration through a pneumatic inclined plate pump 4014; s7, overflowing the conical sedimentation device 401 into a inclined tube precipitator 402, fully contacting with honeycomb filler in an inclined tube, intercepting particles, further clarifying effluent, collecting precipitated effluent by a water tank, and then entering a sand filter 403; s8, after water entering the sand filter 403 is uniformly distributed through the water distribution disc 4035, the water sequentially passes through the quartz sand layer and the cobble supporting layer inside the filter layer 4032 from top to bottom, and the residual fine particle impurities are trapped, so that the water quality of the water outlet is ensured; s9, separating the water discharged from the sand filter 403 into two paths, wherein one path is reused for production, the other path is reused after being desalted by a reverse osmosis device, and concentrated water is treated by an activated carbon filter 4042 and then flows back to a separation section of the cyclone separation device 1, so that closed cycle of water is realized; s10, the activated carbon filter 4042 is regenerated by a hot alkali regeneration process at regular intervals, saturated activated carbon is regenerated in a high-temperature alkali liquor environment, the regenerated activated carbon is returned to the activated carbon filter 4042 for continuous use, and regenerated waste alkali liquor is returned to the spiral propulsion conveying device 3 for mixed treatment with other waste water.
Specific use and action of the embodiment: the wastewater is conveyed into a cyclone separation device 1 and a froth flotation device 2 through a feeding port 1012, firstly enters a first cyclone 101, forms high-speed rotating flow in the device, large particles move to the wall surface and are discharged from a bottom flow port under the action of centrifugal force, the smaller particles enter an overflow port along with ascending flow, the first cyclone 101 overflows into a stirring hopper 102, is fully mixed under the action of a stirring rod 1023, prevents particle deposition, the material of a bearing hopper 1022 enters a second cyclone 103 under the action of gravity, undergoes the cyclone separation process again and is further classified, the fine particle material discharged from the overflow port of the second cyclone 103 enters a buffer hopper 104, the flow rate is controlled to be uniform, the fine particle material uniformly enters the froth flotation device 2 through a regulating valve, the wastewater slowly flows upwards from a baffle plate 205 in a flotation bearing column 201 and is fully contacted with fine bubbles from bottom to top, hydrophobic micro powder is adsorbed on the surface of bubbles under the action of a surfactant, rises to the liquid level along with the foam and is scraped and collected into a foam launder to realize recovery of foam products, mineralization which is not captured at the bottom of a flotation bearing column 201 is collected in a discharge hopper 203, is periodically discharged through a slag discharge valve and is conveyed to a filter press for dehydration, overflow at the upper part of the flotation bearing column 201 enters a water tank, tail water enters a next processing unit along with the tail water, the tail water enters a spiral propulsion conveying device 3, the pump is subjected to the combined action of pushing-extruding-pressing, particles collide and rub each other, flocculation is realized in the pumping process, the discharge of the spiral propulsion conveying device 3 enters a conical precipitation device 401, rapid sedimentation is realized under the action of gravity, mineralization of different particle grades is trapped in layers by a multi-stage screening structure 4012 and is respectively collected, sediment at the bottom of the tank is collected to the center under the slow scraping of a rotary mud scraper 4013, the waste water is conveyed to a filter press by a pneumatic inclined plate pump 4014 to be dehydrated, the conical precipitation device 401 overflows into an inclined tube precipitator 402, the inclined tube is fully contacted with honeycomb filler, particles are trapped, the effluent is further clarified, the precipitated effluent is collected by a water tank and then enters a sand filter 403, the sand filter 403 is evenly distributed, the water enters the quartz sand layer and a cobblestone supporting layer inside a filter layer 4032 from top to bottom after being uniformly distributed by a water distribution disc 4035, the residual fine particle impurities are trapped, the effluent quality is ensured, the water discharged from the sand filter 403 is divided into two paths, one path is recycled for production, the other path is desalted by a reverse osmosis device and then is recycled, the concentrated water is returned to a separation section of a cyclone separation device 1 after being treated by the active carbon filter 4042, the active carbon filter 4042 is periodically regenerated by adopting a hot alkali regeneration process, saturated active carbon is regenerated in a high-temperature alkali environment, the regenerated active carbon filter 4042 is returned for continuous use, and the regenerated waste alkali is returned to a spiral propulsion conveying device 3 for mixed treatment with other waste water.
In this context, the following points need to be noted:
1. The drawings of the embodiments of the present disclosure relate only to the structures related to the embodiments of the present disclosure, and reference may be made to the general design for other structures.
2. The embodiments of the present disclosure and features in the embodiments may be combined with each other to arrive at a new embodiment without conflict.
The foregoing is merely a specific embodiment of the disclosure, but the protection scope of the disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the disclosure, and it should be covered in the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. A wastewater recycling treatment device for silicon carbide micro powder, comprising: a cyclone separation device (1), a froth flotation device (2), a spiral propulsion conveying device (3) and a multistage sedimentation treatment (4);
The cyclone separation device (1) is of a cylindrical structure as a whole; the device is characterized in that one end of the froth flotation device (2) is communicated with a cyclone separation device (1) stationary phase; the spiral propelling and conveying device (3) is communicated with the froth flotation device (2); the multistage sedimentation treatment (4) is connected with the spiral propulsion conveying device (3) and the cyclone separation device (1); the cyclonic separating apparatus (1) comprises: a first cyclone (101), a stirring hopper (102), a second cyclone (103) and a buffer hopper (104); one end of the first cyclone (101) is communicated with the stirring hopper (102); the second cyclone (103) is communicated with the first cyclone (101) through a stirring hopper (102); the buffer hopper (104) is communicated with the second cyclone (103); the screw propulsion conveying device (3) comprises: a pump housing (301) and a rotor assembly (302); the pump shell (301) is of a single-stage single-suction structure, the inner wall of the pump shell (301) is designed into an involute runner, the sectional area of the runner is gradually increased from an inlet to an outlet, and an annular space formed by the runner and the rotor is gradually increased from front to back; a rotor assembly (302) is mounted inside the pump housing (301); the multistage precipitation treatment (4) comprises: the device comprises a conical sedimentation device (401), an inclined tube precipitator (402), a sand filter (403), a concentrated water treatment device (404) and a concentrated water closed-circuit treatment device (405); the conical sedimentation device (401) is communicated with the inclined tube precipitator (402); the sand filter (403) is communicated with the inclined tube precipitator (402); the concentrated water treatment device (404) is communicated with the cyclone separation device (1), the inclined tube precipitator (402) and the sand filter (403); the concentrated water closed-circuit treatment device (405) is connected with the concentrated water treatment device (404), and the concentrated water closed-circuit treatment device (405) is communicated with the spiral propelling and conveying device (3).
2. The apparatus for recycling silicon carbide micropowder wastewater according to claim 1, characterized in that said first cyclone (101) further comprises: a cyclone cylinder (1011), a feeding port (1012), a deflector (1013) and a communicating pipe (1014); the surface of the cyclone cylinder (1011) is fixedly connected with the feeding port (1012); the deflector (1013) is fixedly arranged in the feeding port (1012); one end of the communicating pipe (1014) is communicated with the stationary phase of the feeding port (1012), and the other end of the communicating pipe (1014) is connected with an adjustable centrifugal pump.
3. The wastewater recycling apparatus of silicon carbide micropowder according to claim 1, characterized in that the stirring hopper (102) further comprises: a water outlet pipe (1021), a bearing bucket (1022) and a stirring rod (1023); the number of the water outlet pipes (1021) is two, and the bearing hoppers (1022) are communicated with the first cyclone (101) and the second cyclone (103) through the water outlet pipes (1021); the puddler (1023) is installed in bearing hopper (1022), and puddler (1023) paddle adopts positive and negative twin screw leaf, and positive screw paddle and counter screw She Jiaocuo are arranged.
4. The wastewater recycling apparatus of silicon carbide micropowder according to claim 1, characterized in that the froth flotation apparatus (2) comprises: the flotation device comprises a flotation bearing column (201), a perforated pipe (202), a discharge hopper (203), an active agent feeding port (204), a baffle plate (205) and an adjusting baffle plate (206); the bottom of the floatation bearing column (201) is of a cylindrical structure, the top of the floatation bearing column is of a conical structure, and the floatation bearing column (201) is communicated with the buffer hopper (104); micropores are formed in the top surface of the perforated pipe (202), one end of the perforated pipe (202) is connected with an air compressor, and the other end of the perforated pipe (202) is inserted into the flotation bearing column (201); the top of the discharge hopper (203) is connected with the flotation bearing column (201), and a slag discharge valve is arranged at the bottom of the discharge hopper (203); the active agent adding port (204) is inserted into the flotation bearing column (201); the baffle plates (205) are adjacently arranged in a staggered way to form a zigzag channel; the adjusting baffle plate (206) is slidably arranged at the top of the floatation bearing column (201).
5. A wastewater recycling apparatus for treating silicon carbide micropowder according to claim 1, characterized in that the rotor assembly (302) further comprises: a rotor main shaft (3021), a helical blade (3022) and an end cap (3023); the rotor main shaft (3021) adopts a variable diameter design, the front end is small in diameter, the rear end is large in diameter, two ends are connected through a conical transition section, and the rotor main shaft (3021) is rotatably arranged in the pump shell (301); the spiral blade (3022) is of a trapezoid cross-section design, the rotor main shaft (3021) and the spiral blade (3022) are of an integrated design, the blades are spirally wound on the surface of the main shaft at equal intervals, and the front and rear sections of pitches of the rotor are connected through gradual transition sections; the end cover (3023) is in a conical design, the cone angles are respectively matched with the cone angles of the front section and the rear section of the rotor main shaft (3021), a through hole with the diameter being the diameter of the rotor main shaft (3021) is formed in the center of the front side of the end cover (3023), the rear end of the center main shaft of the rear side of the end cover (3023) is connected through a flange, and a key groove is formed to transmit torque.
6. The wastewater recycling apparatus of fine silicon carbide powder according to claim 1, wherein the conical precipitation apparatus (401) further comprises: the device comprises a conical tank body (4011), a screening structure (4012), a rotary mud scraper (4013) and a pneumatic inclined plate pump (4014); the conical tank body (4011) is of a conical structure; the screening structure (4012) is arranged in the conical tank body (4011), and the screening structure (4012) is arranged in multiple stages; the rotary mud scraper (4013) is arranged inside the conical tank body (4011); the pneumatic sloping plate pump (4014) is communicated with the conical tank body (4011).
7. The wastewater recycling apparatus of silicon carbide micropowder according to claim 1, wherein the inclined tube settler (402) further comprises: a water inlet zone (4021), an inclined tube zone (4022) and a water outlet zone (4023); the water inlet area (4021) is designed into a round shape, and water flow is uniformly introduced by four water inlet pipes which are vertically arranged; the inclined tube area (4022) is filled with regular hexagonal honeycomb inclined tubes; the water outlet area (4023) is an annular overflow weir structure and is divided into an inner weir and an outer weir.
8. The wastewater recycling apparatus of fine silicon carbide powder according to claim 1, wherein the sand filter (403) further comprises: the outer cylinder (4031), the filter layer (4032), the water inlet pipe (4033), the vertical pipe (4034), the water distribution disk (4035), the flower pipe (4036), the water collection disk (4037) and the water outlet pipe (4038); the top of the outer cylinder (4031) is provided with a backwash water pipe and a compressed air pipe, the filter layer (4032) is arranged inside the outer cylinder (4031), and the filter layer (4032) adopts two layers of filter materials of active carbon/quartz sand; the water inlet pipe (4033) is arranged in the middle of the inside of the outer cylinder (4031), and the water inlet pipe (4033) is communicated with the inclined tube precipitator (402); the top of the vertical pipe (4034) is connected with the water inlet pipe (4033), and the bottom of the vertical pipe (4034) is inserted into the filter layer (4032); the water distribution disc (4035) is communicated with the vertical pipe (4034), the water distribution disc (4035) is of a fan-shaped structure, and the periphery of the water distribution disc (4035) is provided with horizontal slits; the flower tube (4036) adopts a round hole flower tube, and the flower tube (4036) is inserted into the filter layer (4032); the flower pipe (4036) is communicated with the water collecting disc (4037), the top of the water collecting disc (4037) is contacted with the supporting layer of the filtering layer (4032), and the bottom of the water collecting disc is fixedly connected with the outer cylinder (4031).
9. The apparatus for recycling silicon carbide micro powder wastewater according to claim 1, wherein the apparatus (404) for recycling concentrated water further comprises: a concentrated water collection tank (4041) and an activated carbon filter (4042); a stirrer is arranged in the concentrated water collecting tank (4041) to keep the concentrated water in the tank in a suspension state, and sludge water discharged by the inclined tube precipitator (402), underflow of the cyclone separation device (1) and backwash wastewater of the sand filter (403) are collected into the concentrated water collecting tank (4041); the concentrated water collecting tank (4041) is communicated with the activated carbon filter (4042) through a lifting pump.
10. A wastewater recycling method of silicon carbide micro powder, based on the wastewater recycling device of the silicon carbide micro powder according to any one of claims 1 to 9, characterized in that the wastewater recycling method of the silicon carbide micro powder comprises the following steps:
S1, conveying wastewater into a cyclone separation device (1) and a foam flotation device (2) through a feeding port (1012), firstly entering a first cyclone (101), forming high-speed rotating flow in the device, moving larger particles to a wall surface under the action of centrifugal force, discharging the larger particles from a bottom flow port, and enabling the finer particles to enter an overflow port along with rising flow;
s2, overflowing the first cyclone (101) into a stirring hopper (102), fully mixing under the action of a stirring rod (1023), preventing particles from depositing, enabling the material of the bearing hopper (1022) to enter a second cyclone (103) under the action of gravity, and performing cyclone separation again for further classification;
S3, fine particle materials discharged from an overflow port of the second cyclone (103) enter a buffer hopper (104), flow is controlled by a regulating valve to uniformly enter a foam flotation device (2), wastewater slowly flows upwards in a flotation bearing column (201) through a baffle plate (205) and fully contacts with fine bubbles from bottom to top, hydrophobic micro powder is adsorbed on the surface of the bubbles under the action of a surfactant, rises to the liquid level along with foam and is scraped and collected into a foam launder, and recovery of foam products is realized;
S4, collecting the mineralized matters which are not captured at the bottom of the flotation bearing column (201) in a discharge hopper (203), periodically discharging the mineralized matters through a slag discharge valve, conveying the mineralized matters to a filter press for dehydration, overflowing the upper part of the flotation bearing column (201) into a water tank, and enabling the mineralized matters to enter a next treatment unit along with tail water;
S5, enabling tail water to enter a spiral propulsion conveying device (3), and enabling particles to collide and rub with each other under the combined action of pushing, extruding and pressing in a pump so as to realize flocculation in the pumping process;
S6, discharging materials of the spiral propulsion conveying device (3) enter a conical sedimentation device (401), rapidly settling under the action of gravity, intercepting mineralized materials of different particle sizes by layers of a multi-stage screening structure (4012) and respectively collecting the mineralized materials, collecting sediments at the bottom of a pond to the center under the slow scraping and collecting of a rotary mud scraper (4013), and conveying the sediments to a filter press for dehydration by a pneumatic inclined plate pump (4014);
S7, overflowing the conical sedimentation device (401) into an inclined tube precipitator (402), fully contacting with honeycomb filler in an inclined tube, intercepting particles, further clarifying effluent, collecting precipitated effluent by a water tank, and then entering a sand filter (403);
s8, after the inflow water of the sand filter (403) is uniformly distributed through the water distribution disc (4035), the inflow water sequentially passes through the quartz sand layer and the cobble supporting layer in the filter layer (4032) from top to bottom, so that the residual fine particle impurities are trapped, and the quality of the outflow water is ensured;
s9, the water discharged from the sand filter (403) is divided into two paths, wherein one path is recycled for production, the other path is desalted and recycled by a reverse osmosis device, and concentrated water is treated by an active carbon filter (4042) and then flows back to a separation section of the cyclone separation device (1) to realize closed cycle of water;
S10, the activated carbon filter (4042) is regenerated by a hot alkali regeneration process at regular intervals, saturated activated carbon is regenerated in a high-temperature alkali liquor environment, the regenerated activated carbon filter (4042) is returned for continuous use, and regenerated waste alkali liquor is returned to the spiral propulsion conveying device (3) for mixed treatment with other wastewater.
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| CN114890560A (en) * | 2022-04-08 | 2022-08-12 | 中国石油大学(华东) | Delayed coking wastewater fine particle removal process device |
| CN217479259U (en) * | 2022-06-23 | 2022-09-23 | 中冶西北工程技术有限公司 | Continuous rolling turbid circulating water purification system |
| CN217600487U (en) * | 2022-03-31 | 2022-10-18 | 东莞市凯瑞科技有限公司 | Wastewater recycling treatment equipment |
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| CN217600487U (en) * | 2022-03-31 | 2022-10-18 | 东莞市凯瑞科技有限公司 | Wastewater recycling treatment equipment |
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