CN114314996B - Coking wastewater treatment method and device - Google Patents
Coking wastewater treatment method and device Download PDFInfo
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- CN114314996B CN114314996B CN202210243788.3A CN202210243788A CN114314996B CN 114314996 B CN114314996 B CN 114314996B CN 202210243788 A CN202210243788 A CN 202210243788A CN 114314996 B CN114314996 B CN 114314996B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to the technical field of coking wastewater treatment, and discloses a coking wastewater treatment method and a coking wastewater treatment device, wherein the coking wastewater treatment device comprises: the rotating outer barrel is rotatably arranged inside the shell. The rotating inner barrel is rotatably arranged inside the shell. The inner part of the shell below the rotating outer barrel forms a smoke air cavity. The driving piece is fixedly connected with the rotating inner barrel and the rotating outer barrel. The hopper rotates and sets up on the mounting bracket, and the bottom of hopper is provided with the feeding piece. And the rotation driving structure is arranged on the shell or the mounting frame and is connected with the hopper. And the heat exchange spiral plate is fixedly arranged on the outer wall of the rotating inner barrel. The detection member is installed inside the rotating inner tub for detecting the concentration of organic matter inside the rotating inner tub. The invention enables one driving piece to complete the large particle separation, organic matter separation and liquid spraying linkage operation by matching the rotating outer barrel and the rotating inner barrel, thereby realizing the linkage of the process sequence, simplifying the operation structure, saving energy and being convenient and fast to control.
Description
Technical Field
The invention relates to the technical field of coking wastewater treatment, in particular to a coking wastewater treatment method and a coking wastewater treatment device.
Background
Coking wastewater mainly comes from coking, gas purification and chemical product refining processes, is a component containing dozens of pollutants such as phenol, cyanogen, benzene, ammonia, nitrogen and the like and complex wastewater thereof, and belongs to typical high-concentration toxic harmful refractory organic wastewater. At present, domestic coking enterprises generally adopt a coking wastewater process flow taking traditional biological denitrification treatment as a core, and the process flow is divided into pretreatment, biochemical treatment and advanced treatment; the pretreatment mainly adopts a physical and chemical method; the biochemical treatment mainly comprises A/O, A2/O and other processes; the advanced treatment is an activated carbon adsorption method. However, the prior art has the problems of serious pollution, blockage and corrosion, immature process, unstable device operation, high operation cost and non-ideal treatment effect.
The coking wastewater is rich in volatile phenol, polycyclic aromatic hydrocarbon, oxygen, sulfur, nitrogen and other heterocyclic compounds, so the coking wastewater has the characteristics of high CODcr, high phenol value, high nitrogen and high salt, and has the problems of large change of water quality and water quantity, complex composition of refractory organic pollutants and serious pollution. The existing processing equipment has the disadvantages of complex structure, large occupied area and high manufacturing cost.
Disclosure of Invention
In order to solve the technical problem, the invention provides a coking wastewater treatment device, which comprises:
a housing;
the rotating outer barrel is rotatably arranged inside the shell, and a through hole is formed in the middle of the bottom of the rotating outer barrel;
the rotating inner barrel is rotatably arranged in the shell and penetrates through the through hole, the rotating outer barrel divides the rotating inner barrel into an upper part and a lower part, a smoke cavity is formed in the shell below the rotating outer barrel, the rotating inner barrel penetrates into the rotating outer barrel and the smoke cavity, and the rotating inner barrel is provided with through holes;
the driving piece is arranged on the shell through the mounting rack, is fixedly connected with the rotating inner barrel and the rotating outer barrel and is used for driving the rotating outer barrel and the rotating inner barrel to rotate;
a liquid inlet pipe for quantitatively adding wastewater;
the hopper is rotatably arranged on the mounting frame, the interior of the hopper is used for placing solid raw materials and is quantitatively put into the rotating outer barrel, the bottom of the hopper is provided with a feeding piece, the feeding piece is in contact with the top of the rotating inner barrel, and feeding is completed by driving the rotating inner barrel;
the rotation driving structure is arranged on the shell or the mounting rack, is connected with the hopper and is used for driving the hopper to rotate;
the heat exchange spiral plate is fixedly arranged on the outer wall of the rotating inner barrel and is positioned inside the smoke gas cavity, and a leak hole which penetrates through the heat exchange spiral plate up and down is formed in the heat exchange spiral plate; the shell is provided with a steam outlet pipe, a steam inlet pipe and a slag discharge port, the steam inlet pipe is communicated with a high-temperature flue gas source, and the high-temperature flue gas enters the flue gas cavity through the steam inlet pipe for flash evaporation and salting out;
the detection piece is arranged inside the rotating inner barrel and is used for detecting the concentration of organic matters inside the rotating inner barrel;
the controller is used for controlling the liquid inlet pipe to feed wastewater at a flow rate v, and the wastewater enters between the rotating outer barrel and the rotating inner barrel; the driving piece drives the rotating outer barrel to rotate in the positive direction; the detection piece detects the concentration n of organic matters in the rotating inner barrel; the controller searches a preset concentration-feeding ratio information table to obtain a
Value and calculate the sinkingMass flow rate w of starch; searching a preset flow-angle value information table to obtain a feeding angle value theta of the hopper; the rotation driving structure drives the hopper to form an included angle theta with the radial direction; the controller searches a preset concentration-flow information table to obtain the high-temperature flue gas flow; the high-temperature flue gas passes through the leakage hole to exchange heat with the wastewater to generate salt crystals.
Preferably: the inside of shell is fixed and is provided with the fixed axle, and the bottom of bucket in the fixed axle passes the rotation is fixed with a plurality of stirring leaves on the fixed axle.
Preferably: the bottom inner side of the rotating outer barrel is provided with a feeding slope, and the bottom outer side of the rotating outer barrel is provided with a containing groove.
Preferably: the inner wall of the shell is provided with a scraping piece in a lifting manner, the scraping piece is positioned in the smoke gas cavity, and the scraping piece is used for scraping salt crystals on the heat exchange spiral plate; and the thickness detection part is arranged in the smoke gas cavity and is used for detecting the thickness of the salt crystal layer on the heat exchange spiral plate.
Preferably: scrape the material piece including lift groove, spring, sliding block and scraping the material pole, the inner wall at the shell is seted up in the lift groove, the sliding block liftable slides in the inside of lift groove, fixed being provided with on the sliding block scrapes the material pole, the fixed material piece of scraping that is provided with in top of scraping the material pole, the fixed spring that is provided with of at least one end of sliding block, the spring resets the sliding block, the axis level of scraping the material pole is less than heat transfer spiral plate top height.
Preferably: the bottom of the shell is provided with a base, the bottom of the base is provided with one or the combination of a rotating wheel and a universal wheel, and the rotating wheel and/or the universal wheel are/is provided with a clamping plate for braking.
Preferably: the driving piece comprises a motor, a driving belt pulley, a rotating shaft and a driven belt pulley, the motor is installed on the installation frame, the driving belt pulley is fixedly connected with the output shaft of the motor in a coaxial mode, the installation frame is provided with the rotating shaft in a rotating mode, the driven belt pulley is fixedly connected with the rotating shaft in a coaxial mode, and the driven belt pulley is connected with the driving belt pulley through a belt.
Preferably: the feeding piece comprises a rotating cavity, a rotating roller and a rotating wheel; the rotating cavity is formed in the bottom of the hopper, the rotating roller is arranged in the rotating cavity in a rotating mode, a plurality of feeding plates are radially and fixedly arranged on the side wall of the rotating roller, one end of the rotating roller extends out of the hopper, and a rotating wheel is coaxially and fixedly arranged and is in contact with the top of the rotating inner barrel.
The invention also provides a coking wastewater treatment method, which is applied to the coking wastewater treatment device and comprises the following steps:
s1, feeding wastewater by a liquid inlet pipe at a flow rate v, and enabling the wastewater to enter between the rotating outer barrel and the rotating inner barrel;
s2, the driving piece drives the rotating outer barrel to rotate positively, large-particle impurities are separated under the action of rotating centrifugal force, and liquid enters the rotating inner barrel;
s3, detecting the concentration n of organic matters in the rotating inner barrel by a detecting piece;
s4, searching a preset concentration-feed ratio information table to obtain a
Calculating the mass flow w of the precipitator;
s5, searching a preset flow-angle value information table to obtain a feeding angle value theta of the hopper;
s6, the hopper is driven by the rotary driving structure to form an included angle theta with the radial direction, the feeding piece is contacted with the top of the rotary inner barrel, and the rotary inner barrel drives the feeding piece to finish feeding;
s7, precipitating and filtering organic matters which are difficult to degrade in the liquid, enabling the waste water to enter the flue gas cavity, enabling the liquid to penetrate through the through holes under the action of centrifugal force to be sprayed on the heat exchange spiral plate, and enabling the liquid to penetrate through the leakage holes under the action of gravity;
s8, searching a preset concentration-flow information table to obtain the high-temperature flue gas flow;
and S9, allowing the high-temperature flue gas to pass through the leakage hole to exchange heat with the wastewater to generate salt crystals, and discharging the waste gas from the steam outlet pipe to enter the cooling tower.
Preferably: the coking wastewater treatment method further comprises the following steps:
s11, detecting the thickness H of a salt crystal layer on the heat exchange spiral plate by a thickness detection piece;
s12, judging whether the thickness H is more than or equal to a preset thickness HSign boardIf so, go to S13;
s13, reversely driving the driving piece, pressing the scraping round rod by the heat exchange spiral plate, and scraping the salt crystal layer on the lower surface of the heat exchange spiral plate by the scraping piece;
s14, judging the driving turn number F of the driving piece1Whether it is equal to a preset F0，F0If the number of turns of the heat exchange spiral plate is equal to the preset value, S15 is executed;
s15, the driving piece drives the rotating inner barrel and the rotating outer barrel to rotate positively, and the scraping round rod is positioned at the top of the heat exchange spiral plate.
The invention has the technical effects and advantages that: the invention enables one driving piece to complete the large particle separation, organic matter separation and liquid spraying linkage operation by matching the rotating outer barrel and the rotating inner barrel, thereby realizing the linkage of the process sequence, simplifying the operation structure, saving energy and being convenient and fast to control. The control of the feeding speed is completed by adjusting the hopper, the control is convenient and fast, the redundant power output is avoided, the energy is saved, and the control is accurate.
Drawings
FIG. 1 is a schematic view of a layer structure of a coking wastewater treatment device provided by the invention.
FIG. 2 is a schematic top view of a coking wastewater treatment device according to the present invention.
Fig. 3 is a partial sectional structural view of the section a-a in fig. 2.
FIG. 4 is a schematic structural diagram of a middle feeding member of a coking wastewater treatment device provided by the invention.
Fig. 5 is a partial enlarged structural diagram of a in fig. 3.
FIG. 6 is a schematic structural diagram of a scraper in a coking wastewater treatment device according to the present invention.
FIG. 7 is a first state flow chart of a coking wastewater treatment method according to the present invention.
FIG. 8 is a flow chart of a second state of the coking wastewater treatment method provided by the invention.
Description of reference numerals: the device comprises a shell 1, a rotating outer barrel 2, a hopper 3, a rotating inner barrel 4, a mounting frame 5, a driven belt pulley 6, a driving belt pulley 7, a motor 8, a rotating shaft 9, a fixing shaft 10, a stirring blade 11, a steam outlet pipe 12, a steam inlet pipe 13, a base 14, a universal wheel 15, a smoke gas cavity 16, a heat exchange spiral plate 17, a scraping piece 18, a feeding plate 19, a rotating wheel 20, a rotating roller 21, a containing groove 22, a feeding slope 23, a guide rod 24, a spring 25, a sliding block 26, a scraping round rod 27 and a scraping sheet 28.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Example 1
Referring to fig. 1 to 3, in the present embodiment, a coking wastewater treatment apparatus for treating coking wastewater is provided, the coking wastewater treatment apparatus includes:
the shell 1 can be a barrel-shaped structure or a polygonal barrel-shaped structure, and the shell 1 can be made of stainless steel, so that certain rigidity is guaranteed, and the shell 1 is prevented from deforming in the operation process. The bottom of the housing 1 may be provided with a base 14, the bottom of the base 14 may be provided with a through hole, and a bolt passes through the through hole to fix the housing 1. Of course, the bottom of the base 14 may also be provided with one or a combination of two of a rotating wheel and a universal wheel 15, and the rotating wheel and/or the universal wheel 15 is/are provided with a clamping plate for braking, so as to facilitate the movement and fixation of the coking wastewater treatment device.
The inside of shell 1 is rotated and is provided with and rotates outer bucket 2, rotates outer bucket 2 and can be cask column structure, has seted up the through-hole in the middle of the bottom of rotating outer bucket 2, and the through-hole is circular structure. The inside of shell 1 rotates and is provided with the interior bucket of rotation 4, rotates interior bucket 4 and passes the inside of running-through, and the outer bucket of rotation 2 and the interior bucket of rotation 4 can be coaxial fixed connection. The bottom of the rotating outer barrel 2 and the bottom of the rotating inner barrel 4 can be hermetically connected, and detailed description is omitted here. The rotating outer barrel 2 divides the rotating inner barrel 4 into an upper part and a lower part, a smoke cavity 16 is formed inside the shell 1 below the rotating outer barrel 2, and the rotating inner barrel 4 penetrates into the rotating outer barrel 2 and the smoke cavity 16. The rotating inner barrel 4 is provided with a through hole.
And a driving member, which can be installed on the housing 1 through a mounting bracket 5 and is fixedly connected with the rotating inner barrel 4 and the rotating outer barrel 2, for driving the rotating outer barrel 2 and the rotating inner barrel 4 to rotate. The driving piece can include motor 8, drive pulley 7, the axis of rotation 9, driven pulley 6, motor 8 installs on mounting bracket 5, the coaxial fixedly connected with drive pulley 7 of output shaft of motor 8, it is provided with axis of rotation 9 to rotate on the mounting bracket 5, driven pulley 6 and the coaxial fixed connection of axis of rotation 9, connect through the belt between driven pulley 6 and the drive pulley 7, thereby the rotation of axis of rotation 9 has been realized, interior bucket 4 is with rotating in the axis of rotation 9, connect through the cradling piece between the outer bucket 2 of rotation, thereby can accomplish the drive of rotating outer bucket 2 and rotating interior bucket 4. Of course, the transmission can also be performed through a gear structure, which is not described in detail herein. The cover is fixedly arranged on the mounting frame 5, the cover covers the driven pulley 6 and the driving pulley 7, so that the situation that sundries enter the belt, the driven pulley 6 and the driving pulley 7 to influence transmission is avoided, and meanwhile, the safety of the coking wastewater treatment device is improved.
Feed liquor pipe, can fixed connection on mounting bracket 5 or shell 1 for waste water is added to the ration, can set up the ration control valve on the feed liquor pipe, specifically does not describe here any more.
And the rotation driving structure is arranged on the shell 1 or the mounting frame 5, is connected with the hopper 3 and is used for driving the hopper 3 to rotate, so that the radial included angle between the plane where the rotating wheel 20 is positioned and the contact point in the rotating inner barrel 4 is a. The rotation driving structure can be a hydraulic rod, an electric telescopic rod, a pneumatic rod and the like, and is not described in detail herein.
And the heat exchange spiral plate 17 is fixedly arranged on the outer wall of the rotating inner barrel 4 and is positioned inside the smoke gas cavity 16, and the heat exchange spiral plate 17 is provided with a leak hole which penetrates through the heat exchange spiral plate from top to bottom. Heat transfer spiral plate 17 is spiral platelike structure, and inboard fixed connection is at the outer wall of bucket 4 in rotating, and heat transfer spiral plate 17's outer wall and the inner wall sliding construction of shell 1, heat transfer spiral plate 17 can be stainless steel or other materials, and concrete this is not done repeatedly. The shell 1 is provided with a steam outlet pipe 12, a steam inlet pipe 13 and a slag discharge port. The steam inlet pipe 13 is communicated with a high-temperature flue gas source, the high-temperature flue gas enters the flue gas cavity 16 through the steam inlet pipe 13 for flash evaporation and salting, and finally the waste water is discharged from the steam outlet pipe 12. The steam inlet pipe 13 is provided with a flow control valve for controlling the flow of the high-temperature flue gas. The heat exchange spiral plate 17 forms a heat exchange plate, thereby increasing the heat exchange capacity of the high-temperature flue gas and the waste water. Of course, the heat exchange spiral plate 17 may also be fixedly disposed on the inner wall of the casing 1, which is not described herein in detail.
The detection piece is installed inside the rotating inner barrel 4 and used for detecting the concentration of organic matters inside the rotating inner barrel 4, and the detection piece can be a photometric graduated meter and the like, which is not described herein in detail.
And the controller is electrically connected with the liquid inlet pipe, the driving piece, the rotation driving structure, the detection piece and the flow control valve. The controller controls the liquid inlet pipe to feed wastewater by taking the flow as v, the wastewater enters between the rotating outer barrel 2 and the rotating inner barrel 4, the driving piece drives the rotating outer barrel 2 to rotate, large-particle impurities are separated under the action of rotating centrifugal force, and liquid entersThe inside of the rotating inner barrel 4 is detected by a detection part, the concentration n of organic matters in the inside of the rotating inner barrel 4 is detected by a controller, a preset concentration-feeding ratio information table is searched by the controller, and then a concentration-feeding ratio information table is obtained
And calculating the mass flow w of the precipitator, and searching a preset flow-angle value information table to obtain a feeding angle value theta of the hopper 3, wherein the rotating driving structure drives the hopper 3 to form an included angle theta with the radial direction, the rotating wheel 20 is contacted with the top of the rotating inner barrel 4, and the rotating inner barrel 4 drives the rotating wheel 20 to rotate, so that the rotating roller 21 rotates to complete feeding. The precipitant can be phosphoric acid, oxidant, coagulant aid, etc., and will not be described herein. Organic matters which are difficult to degrade in the liquid are precipitated and separated out and are filtered, the waste water enters the flue gas cavity 16, the liquid penetrates through the through holes under the action of centrifugal force and is sprayed on the heat exchange spiral plate 17, and penetrates through the leakage holes under the action of gravity, the controller searches a preset concentration-flow information table so as to obtain the flow rate of high-temperature flue gas, the high-temperature flue gas penetrates through the leakage holes to exchange heat with the waste water to generate salt crystals, and the waste gas is discharged from the steam outlet pipe 12 and enters the cooling tower. Through the cooperation of rotating outer bucket 2 and rotating inner bucket 4, make a driving piece accomplish large granule separation, organic matter separation and hydrojet linkage operation, realized the technology order and moved, make the operation structure simplization, the energy saving, control convenient and fast. The control of the feeding speed is completed by adjusting the hopper 3, the control is convenient and fast, the redundant power output is avoided, the energy is saved, and the control is accurate.
Example 2
Referring to fig. 3, a fixing shaft 10 is fixedly disposed inside the housing 1, the fixing shaft 10 penetrates through the bottom of the rotating inner barrel 4, the fixing shaft 10 can be coaxially and rotatably connected with the rotating inner barrel 4, so that smooth rotation of the fixing shaft 10 and the rotating inner barrel 4 is ensured, a plurality of stirring blades 11 are fixedly disposed on the fixing shaft 10, the stirring blades 11 can rotate relative to the rotating inner barrel 4, and the stirring blades 11 stir the rotating wastewater, so that a precipitator is mixed with the wastewater, which is not described herein in detail. Referring to fig. 5, the bottom inboard of rotating outer bucket 2 is provided with feeding slope 23, has seted up the bottom outside of rotating outer bucket 2 and has held groove 22, holds the setting of groove 22 and is convenient for large granule waste collection, and the setting of feeding slope 23 is convenient for waste water and is entered into the inside of rotating inner bucket 4, and is specifically not repeated here.
Example 3
Referring to fig. 6, the inner wall of housing 1 is liftable be provided with scrape material 18, scrape material 18 and be in the inside of flue gas chamber 16, scrape material 18 and be used for scraping the material to the salt crystal on the heat transfer spiral plate 17, scrape material 18 including lift groove, spring 25, sliding block 26 and scrape material round bar 27, the inner wall at housing 1 is seted up in the lift groove, sliding block 26 liftable slides in the inside of lift groove, the fixed material round bar 27 of scraping that is provided with on sliding block 26, the fixed material piece 28 of scraping that is provided with in top of material round bar 27, the fixed spring 25 that is provided with of at least one end of sliding block 26, spring 25 resets sliding block 26, the axis level of scraping material round bar 27 is less than heat transfer spiral plate 17 top height.
A thickness detection part which can be arranged inside the smoke gas cavity 16 and is used for detecting the thickness of the salt crystal layer on the heat exchange spiral plate 17, a controller receives the thickness H of the salt crystal layer detected by the thickness detection part, and the controller judges whether the thickness H is more than a preset HSign boardIf yes, the controller controls the driving piece to reversely drive, the heat exchange spiral plate 17 presses the material scraping round rod 27 downwards, the material scraping sheet 28 scrapes a salt crystal layer on the lower surface of the heat exchange spiral plate 17, and the controller judges the driving turn number F of the driving piece1Whether it is equal to a preset F0，F0The number of turns of the heat exchange spiral plate 17. When the scraping member 18 is at the bottom of the heat exchanging spiral plate 17, the driving member drives the rotating inner barrel 4 and the rotating outer barrel 2 to rotate in the forward direction, and the scraping round rod 27 is at the top of the heat exchanging spiral plate 17. The fixed guide bar 24 that is provided with in inside of lift groove, guide bar 24 slide and pass sliding block 26 and spring 25 to slide and lead sliding block 26, do not specifically describe here any more. And discharging the salt crystals from a slag discharge port.
Example 4
Referring to fig. 7 to 8, in the present embodiment, a coking wastewater treatment method is provided, including the following steps:
s1, feeding wastewater by a liquid inlet pipe at a flow rate v, and enabling the wastewater to enter between the rotating outer barrel 2 and the rotating inner barrel 4.
S2, the driving piece drives the rotating outer barrel 2 to rotate positively, large particle impurities are separated under the action of rotating centrifugal force, and liquid enters the rotating inner barrel 4.
S3, the detecting element detects the concentration n of the organic matter in the rotating inner barrel 4.
S4, searching a preset concentration-feed ratio information table to obtain a
And calculating the mass flow w of the precipitant.
S5, searching a preset flow-angle value information table to obtain the feeding angle value theta of the hopper 3.
S6, the rotating driving structure drives the hopper 3 to form an included angle theta with the radial direction, the feeding piece is contacted with the top of the rotating inner barrel 4, and the rotating inner barrel 4 drives the feeding piece to finish feeding.
S7, precipitating and filtering organic matters which are difficult to degrade in the liquid, enabling the waste water to enter the flue gas cavity 16, enabling the liquid to penetrate through the through holes under the action of centrifugal force to be sprayed on the heat exchange spiral plate 17, and enabling the liquid to penetrate through the leakage holes under the action of gravity.
And S8, searching a preset concentration-flow information table to obtain the high-temperature flue gas flow.
S9, the high-temperature flue gas passes through the leak hole to exchange heat with the waste water to generate salt crystals, and the waste gas is discharged from the steam outlet pipe 12 and enters the cooling tower.
S11, the thickness detection piece detects the thickness H of the salt crystal layer on the heat exchange spiral plate 17.
S12, judging whether the thickness H is more than or equal to a preset thickness HSign boardIf so, S13 is executed.
S13, the driving element is driven reversely, the heat exchange spiral plate 17 presses the scraping round rod 27, and the scraping sheet 28 scrapes the salt crystal layer on the lower surface of the heat exchange spiral plate 17.
S14, judging the driving turn number F of the driving piece1Whether it is equal to a preset F0，F0For the number of turns of the heat exchange spiral plate 17, if yes, S is performed15。
S15, the driving element drives the rotating inner barrel 4 and the rotating outer barrel 2 to rotate in the positive direction, and the scraping round rod 27 is positioned at the top of the heat exchange spiral plate 17.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are not specifically illustrated or described, but are instead contemplated to be practiced in the art by those skilled in the art.
Claims (10)
1. A coking wastewater treatment device is characterized by comprising:
a housing;
the rotating outer barrel is rotatably arranged inside the shell, and a through hole is formed in the middle of the bottom of the rotating outer barrel;
the rotating inner barrel is rotatably arranged in the shell and penetrates through the through hole, the rotating outer barrel divides the rotating inner barrel into an upper part and a lower part, a smoke cavity is formed in the shell below the rotating outer barrel, the rotating inner barrel penetrates into the rotating outer barrel and the smoke cavity, and the rotating inner barrel is provided with through holes;
the driving piece is arranged on the shell through the mounting rack, is fixedly connected with the rotating inner barrel and the rotating outer barrel and is used for driving the rotating outer barrel and the rotating inner barrel to rotate;
a liquid inlet pipe for quantitatively adding wastewater;
the hopper is rotatably arranged on the mounting frame, the interior of the hopper is used for placing solid raw materials and is quantitatively put into the rotating outer barrel, the bottom of the hopper is provided with a feeding piece, the feeding piece is in contact with the top of the rotating inner barrel, and feeding is completed by driving the rotating inner barrel;
the rotation driving structure is arranged on the shell or the mounting rack, is connected with the hopper and is used for driving the hopper to rotate;
the heat exchange spiral plate is fixedly arranged on the outer wall of the rotating inner barrel and is positioned inside the smoke gas cavity, and a leak hole which penetrates through the heat exchange spiral plate up and down is formed in the heat exchange spiral plate; the shell is provided with a steam outlet pipe, a steam inlet pipe and a slag discharge port, the steam inlet pipe is communicated with a high-temperature flue gas source, and the high-temperature flue gas enters the flue gas cavity through the steam inlet pipe for flash evaporation and salting out;
the detection piece is arranged inside the rotating inner barrel and is used for detecting the concentration of organic matters inside the rotating inner barrel;
the controller is used for controlling the liquid inlet pipe to feed wastewater at a flow rate v, and the wastewater enters between the rotating outer barrel and the rotating inner barrel; the driving piece drives the rotating outer barrel to rotate in the positive direction; the detection piece detects the concentration n of organic matters in the rotating inner barrel; the controller searches a preset concentration-feeding ratio information table to obtain a
Calculating the mass flow w of the precipitator; searching a preset flow-angle value information table to obtain a feeding angle value theta of the hopper; the rotation driving structure drives the hopper to form an included angle theta with the radial direction; the controller searches a preset concentration-flow information table to obtain the high-temperature flue gas flow; the high-temperature flue gas passes through the leakage hole to exchange heat with the wastewater to generate salt crystals.
2. The coking wastewater treatment device of claim 1, characterized in that a fixed shaft is fixedly arranged inside the shell and penetrates through the bottom of the rotating inner barrel, and a plurality of stirring blades are fixedly arranged on the fixed shaft.
3. The coking wastewater treatment device according to claim 1, characterized in that a feeding slope is arranged on the inner side of the bottom of the rotating outer barrel, and a containing groove is arranged on the outer side of the bottom of the rotating outer barrel.
4. The coking wastewater treatment device according to claim 1, characterized in that the inner wall of the housing is provided with a scraping member which can lift up and down, the scraping member is positioned in the flue gas chamber, and the scraping member is used for scraping salt crystals on the heat exchange spiral plate; and the thickness detection part is arranged in the smoke gas cavity and is used for detecting the thickness of the salt crystal layer on the heat exchange spiral plate.
5. A coking wastewater treatment device according to claim 4, characterized in that the scraping member comprises a lifting groove, a spring, a sliding block and a scraping round bar, the lifting groove is formed in the inner wall of the housing, the sliding block can slide in the lifting groove in a lifting manner, the scraping round bar is fixedly arranged on the sliding block, the scraping piece is fixedly arranged at the top of the scraping round bar, the spring is fixedly arranged at least one end of the sliding block, the spring resets the sliding block, and the horizontal height of the axis of the scraping round bar is smaller than the top height of the heat exchange spiral plate.
6. The coking wastewater treatment device of claim 1, characterized in that the bottom of the casing is provided with a base, the bottom of the base is provided with one or a combination of rotating wheels and universal wheels, and the rotating wheels and/or the universal wheels are provided with clamping plates for braking.
7. The coking wastewater treatment device of claim 1, wherein the driving member comprises a motor, a driving pulley, a rotating shaft and a driven pulley, the motor is mounted on the mounting frame, the driving pulley is coaxially and fixedly connected with an output shaft of the motor, the rotating shaft is rotatably arranged on the mounting frame, the driven pulley is coaxially and fixedly connected with the rotating shaft, and the driven pulley and the driving pulley are connected through a belt.
8. The coking wastewater treatment plant of claim 1, wherein the feed member includes a rotating chamber, a rotating roller and a rotating wheel; the rotating cavity is formed in the bottom of the hopper, the rotating roller is arranged in the rotating cavity in a rotating mode, a plurality of feeding plates are radially and fixedly arranged on the side wall of the rotating roller, one end of the rotating roller extends out of the hopper, and a rotating wheel is coaxially and fixedly arranged and is in contact with the top of the rotating inner barrel.
9. A coking wastewater treatment method applied to a coking wastewater treatment device according to any one of claims 1 to 8, characterized by comprising the steps of:
s1, feeding wastewater by a liquid inlet pipe at a flow rate v, and enabling the wastewater to enter between the rotating outer barrel and the rotating inner barrel;
s2, the driving piece drives the rotating outer barrel to rotate positively, large-particle impurities are separated under the action of rotating centrifugal force, and liquid enters the rotating inner barrel;
s3, detecting the concentration n of organic matters in the rotating inner barrel by a detection piece;
s4, searching a preset concentration-feed ratio information table to obtain a
Calculating the mass flow w of the precipitator;
s5, searching a preset flow-angle value information table to obtain a feeding angle value theta of the hopper;
s6, the hopper is driven by the rotary driving structure to form an included angle theta with the radial direction, the feeding piece is contacted with the top of the rotary inner barrel, and the rotary inner barrel drives the feeding piece to finish feeding;
s7, precipitating and filtering organic matters which are difficult to degrade in the liquid, enabling the waste water to enter the flue gas cavity, enabling the liquid to penetrate through the through holes under the action of centrifugal force to be sprayed on the heat exchange spiral plate, and enabling the liquid to penetrate through the leakage holes under the action of gravity;
s8, searching a preset concentration-flow information table to obtain the high-temperature flue gas flow;
and S9, allowing the high-temperature flue gas to pass through the leakage hole to exchange heat with the wastewater to generate salt crystals, and discharging the waste gas from the steam outlet pipe to enter the cooling tower.
10. The coking wastewater treatment method of claim 9, further comprising:
s11, detecting the thickness H of a salt crystal layer on the heat exchange spiral plate by a thickness detection piece;
s12, judging whether the thickness H is more than or equal to a preset thickness HSign boardIf so, go to S13;
s13, reversely driving the driving piece, pressing the scraping round rod by the heat exchange spiral plate, and scraping the salt crystal layer on the lower surface of the heat exchange spiral plate by the scraping piece;
s14, judging the driving turn number F of the driving piece1Whether it is equal to a preset F0，F0If the number of turns of the heat exchange spiral plate is equal to the preset value, S15 is executed;
s15, the driving piece drives the rotating inner barrel and the rotating outer barrel to rotate positively, and the scraping round rod is positioned at the top of the heat exchange spiral plate.
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