CN112499870A - Continuous solid-liquid separation device and method for o-toluidine production wastewater - Google Patents
Continuous solid-liquid separation device and method for o-toluidine production wastewater Download PDFInfo
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- CN112499870A CN112499870A CN202011388089.5A CN202011388089A CN112499870A CN 112499870 A CN112499870 A CN 112499870A CN 202011388089 A CN202011388089 A CN 202011388089A CN 112499870 A CN112499870 A CN 112499870A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a continuous solid-liquid separation device and method for producing wastewater of o-toluidine, which comprises the steps of discharging the wastewater of o-toluidine into a stirring tank, putting a coagulant into the stirring tank from a dosing hopper, driving the stirring fan blades to fully stir the wastewater and the coagulant in the stirring tank by using a first motor, allowing the stirred mixed solution to flow into a standing tank for standing, opening a valve after solid particles are settled, conveying the mixed solution into a recovery tower for azeotropic treatment, allowing the wastewater after the azeotropic treatment to flow into a collecting hopper, conveying the wastewater into a separator from a feed pipe, prolonging the settling separation time by using a spiral structure of the separator so as to allow the solid particles to settle in a groove, discharging the liquid upwards to a recovery reboiler by using a recovery liquid level regulating valve for subsequent treatment, and avoiding the catalyst in the wastewater from depositing at the bottom of the recovery tower, and causes blockage of the drainage pipeline of the recovery tower to different degrees.
Description
Technical Field
The invention relates to the technical field of o-toluidine production wastewater treatment devices, in particular to a device and a method for continuous solid-liquid separation of o-toluidine production wastewater.
Background
With the improvement of the production technology, the o-toluidine adopts continuous production, thereby greatly reducing the labor intensity of operators. In recent years, with the increasing importance on environmental protection, the requirement on wastewater treatment of production devices is further increased, but in the production of ortho-amine, the catalyst is pulverized to a certain extent, the pulverized catalyst is suspended in materials and enters a recovery system, and after azeotropic treatment of a recovery tower, the catalyst is deposited at the bottom of the recovery tower, so that the blockage of a drainage pipeline of the recovery tower can be caused to different degrees.
Disclosure of Invention
The invention aims to provide a device and a method for continuously separating solid and liquid in o-toluidine production wastewater, and aims to solve the technical problem that in the prior art, a catalyst is pulverized to a certain extent in o-toluidine production, suspended in a material, enters a recovery system, and is deposited at the bottom of a recovery tower through azeotropic treatment of the recovery tower, so that the drainage pipeline of the recovery tower is blocked to different degrees.
In order to achieve the above purpose, the continuous solid-liquid separation device for o-toluidine production wastewater adopted by the present invention comprises a preliminary separation tank, a stirring device, a medicine feeding hopper, a recovery tower, a recovery liquid level regulating valve, a solid-liquid separator and a recovery reboiler, wherein a partition is arranged in the preliminary separation tank, the partition divides the preliminary separation tank into a stirring tank and a standing tank, the medicine feeding hopper is arranged above the stirring tank, the stirring device is arranged in the stirring tank, the standing tank is connected with the recovery tower pipeline, a valve is arranged on the standing tank, the recovery liquid level regulating valve is arranged on the recovery tower, one end of the recovery liquid level regulating valve is connected with the recovery reboiler pipeline, the other end of the recovery liquid level regulating valve is connected with the solid-liquid separator pipeline, and the recovery reboiler is positioned outside the recovery tower, the solid-liquid separator is positioned inside the recovery tower;
the stirring device comprises a first motor, a stirring shaft and stirring blades, the first motor is detachably connected with the stirring tank, and is positioned above the stirring tank, the output end of the first motor is sleeved with the stirring shaft, the stirring fan blades are detachably connected with the stirring shaft, and is positioned at one end of the stirring shaft, which is far away from the first motor, and is positioned in the stirring tank, the solid-liquid separator comprises a collecting hopper, a feeding pipe and a separating body, the collecting hopper is detachably connected with the inner wall of the recovery tower, the bottom of the collecting hopper is provided with the feeding pipe, the separating body is arranged in a spiral structure, the feeding end of the separating body is detachably connected with the feeding pipe, and is located the inlet pipe is kept away from the one end of collecting the fill, the output of the separator with retrieve the liquid regulating valve and can dismantle the connection, the inside of separator is provided with the recess.
The stirring device comprises a stirring tank, and is characterized in that a sliding frame is arranged on the stirring tank, the sliding frame comprises a placing frame, a sliding plate, a second motor, a screw rod and a screw rod sleeve, a sliding rail is arranged on the placing frame, the sliding plate is connected with the placing frame in a sliding mode and is located on the sliding rail, the second motor is connected with the stirring tank in a detachable mode, the output end of the second motor is provided with the screw rod, the screw rod sleeve is arranged on the screw rod, the screw rod sleeve is connected with the sliding plate in a detachable mode, and the sliding plate is connected with the first motor in a detachable.
The placing rack comprises four supporting legs and a bottom plate, the sliding rails are arranged on the bottom plate, the two supporting legs are symmetrically arranged on the two sides of the bottom plate, and each supporting leg is detachably connected with the stirring pool.
The solid-liquid separator also comprises two connecting frames, wherein one end of each connecting frame is detachably connected with the inner wall of the recovery tower, and the other end of each connecting frame is detachably connected with the separating body.
Wherein, every the link all includes connecting plate, diaphragm, first arc connecting block and second arc connecting block, the connecting plate with retrieve the inner wall screwed connection of tower, the diaphragm with connecting plate fixed connection, the one end of first arc connecting block with the one end of second arc connecting block all with diaphragm bolted connection, the other end of first arc connecting block with the other end bolted connection of second arc connecting block.
The invention also provides a continuous solid-liquid separation method for the o-toluidine production wastewater, which adopts the continuous solid-liquid separation device for the o-toluidine production wastewater, and comprises the following steps:
discharging the o-toluidine production wastewater into the stirring tank, and adding a coagulant from the dosing hopper;
the first motor is utilized to drive the stirring fan blades to fully stir the wastewater and the coagulant in the stirring tank, the stirred mixed solution flows into the standing tank to stand, after solid particles are settled, the valve is opened to convey the mixed solution into the recovery tower, and azeotropic treatment is carried out;
the waste water after azeotropic treatment flows into the collecting hopper and is conveyed into the separator from the feeding pipe;
utilize thereby the helical structure extension of separator subsides the separation time and makes solid particle subside in the recess, liquid upwards utilizes retrieve the liquid level control valve and discharge to retrieve the reboiler and get into subsequent processing to avoid the catalyst in the waste water to deposit in the recovery tower bottom, the jam of the drainage pipe of recovery tower that causes to different extent.
The invention has the beneficial effects that: the device is characterized in that the medicine feeding hopper is arranged above the stirring tank, the stirring device is arranged in the stirring tank, the standing tank is connected with the recovery tower through a pipeline, the standing tank is provided with a valve, the recovery tower is provided with the recovery liquid level regulating valve, one end of the recovery liquid level regulating valve is connected with the recovery reboiler through a pipeline, the other end of the recovery liquid level regulating valve is connected with the solid-liquid separator through a pipeline, o-toluidine production wastewater is discharged into the stirring tank, a coagulant is put into the medicine feeding hopper, the stirring fan blades are driven by the first motor to fully stir the wastewater and the coagulant in the stirring tank, the stirred mixed liquid flows into the standing tank to stand, after solid particles are settled, the valve is opened to convey the mixed liquid into the recovery tower for azeotropic treatment, and the wastewater after the azeotropic treatment flows into the collection hopper, conveying from the feeding pipe to in the separator, thereby utilize the helical structure extension settlement separation time of separator makes solid particle subside in the recess, liquid upwards utilizes retrieve liquid level governing valve and discharge to retrieve the reboiler and get into subsequent processing to avoid the catalyst in the waste water to deposit in recovery tower bottom, cause the jam of recovery tower drainage pipe.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus for continuous solid-liquid separation of wastewater from o-toluidine production according to the present invention.
FIG. 2 is a schematic view of the structure of the solid-liquid separator of the present invention.
FIG. 3 is a side view of the preliminary separation tank of the present invention.
Fig. 4 is a sectional view of the inner structure of fig. 3 taken along line a-a according to the present invention.
Fig. 5 is a partially enlarged structural view of a portion a of fig. 4 according to the present invention.
FIG. 6 is a flow chart showing the steps of the continuous solid-liquid separation method for producing wastewater from o-toluidine according to the present invention.
1-a primary separation tank, 2-a dosing hopper, 3-a recovery tower, 4-a recovery liquid level regulating valve, 5-a solid-liquid separator, 6-a recovery reboiler, 7-a partition plate, 8-a stirring tank, 9-a standing tank, 10-a valve, 11-a first motor, 12-a stirring shaft, 13-stirring blades, 14-a collection hopper, 15-a feeding pipe, 16-a separation body, 17-a groove, 18-a sliding frame, 19-a placing frame, 20-a sliding plate, 21-a second motor, 22-a screw rod, 23-a screw rod sleeve, 24-a sliding rail, 25-a supporting leg, 26-a bottom plate, 27-a connecting frame, 28-a connecting plate, 29-a transverse plate, 30-a first arc-shaped connecting block, 31-a second arc-shaped connecting block, a pressure-adjustable pressure, 32-recovery disc, 33-mounting rack, 34-pulley, 35-third motor, 36-winch, 37-hinge and 38-inhaul cable.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 5, the invention provides a continuous solid-liquid separation device for o-toluidine production wastewater, comprising a preliminary separation tank 1, a stirring device, a dosing hopper 2, a recovery tower 3, a recovery liquid level regulating valve 4, a solid-liquid separator 5 and a recovery reboiler 6, wherein a partition plate 7 is arranged in the preliminary separation tank 1, the partition plate 7 divides the preliminary separation tank 1 into a stirring tank 8 and a standing tank 9, the dosing hopper 2 is arranged above the stirring tank 8, the stirring device is arranged in the stirring tank 8, the standing tank 9 is connected with the recovery tower 3 through a pipeline, a valve 10 is arranged on the standing tank 9, the recovery liquid level regulating valve 4 is arranged on the recovery tower 3, one end of the recovery liquid level regulating valve 4 is connected with the recovery reboiler 6 through a pipeline, and the other end of the recovery liquid level regulating valve 4 is connected with the solid-liquid separator 5 through a pipeline, the recovery reboiler 6 is located outside the recovery column 3, and the solid-liquid separator 5 is located inside the recovery column 3;
the stirring device comprises a first motor 11, a stirring shaft 12 and stirring fan blades 13, wherein the first motor 11 is detachably connected with the stirring pool 8 and is positioned above the stirring pool 8, the output end cover of the first motor 11 is provided with the stirring shaft 12, the stirring fan blades 13 are detachably connected with the stirring shaft 12 and are positioned at one end of the stirring shaft 12 far away from the first motor 11 and positioned inside the stirring pool 8, the solid-liquid separator 5 comprises a collecting hopper 14, an inlet pipe 15 and a separating body 16, the collecting hopper 14 is detachably connected with the inner wall of the recovery tower 3, the inlet pipe 15 is arranged at the bottom of the collecting hopper 14, the separating body 16 is arranged in a spiral structure, the inlet end of the separating body 16 is detachably connected with the inlet pipe 15 and is positioned at one end of the inlet pipe 15 far away from the collecting hopper 14, the output end of the separating body 16 is detachably connected with the recovered liquid regulating valve, and a groove 17 is formed in the separating body 16.
In the present embodiment, the chemical feeding hopper 2 is provided above the stirring tank 8, the stirring device is provided inside the stirring tank 8, the standing tank 9 is connected to the recovery tower 3 through a pipe, the standing tank 9 is provided with a valve 10, the recovery tower 3 is provided with the recovery liquid level control valve 4, one end of the recovery liquid level control valve 4 is connected to the recovery reboiler 6 through a pipe, the other end of the recovery liquid level control valve 4 is connected to the solid-liquid separator 5 through a pipe, the recovery reboiler 6 is located outside the recovery tower 3, the solid-liquid separator 5 is located inside the recovery tower 3, the o-toluidine production wastewater is discharged into the stirring tank 8, the coagulant is put into the chemical feeding hopper 2, and the first motor 11 drives the stirring blades 13 to sufficiently stir the wastewater and the coagulant inside the stirring tank 8, the mixed liquid after stirring flows to the standing pool 9 for standing, after solid particles are settled, the valve 10 is opened to convey the mixed liquid to the recovery tower 3 for azeotropic treatment, the waste water after azeotropic treatment flows to the collecting hopper 14, the waste water is conveyed to the separating body 16 from the feeding pipe 15, the spiral structure of the separating body 16 is utilized to prolong the settling separation time, so that the solid particles are settled in the groove 17, the liquid is upwards utilized to be discharged to the recovery reboiler 6 by the recovery liquid level regulating valve 4 for subsequent treatment, and therefore the catalyst in the waste water is prevented from being deposited at the bottom of the recovery tower 3 to block a drainage pipeline of the recovery tower 3.
Further, be provided with carriage 18 on the stirring pond 8, carriage 18 includes rack 19, sliding plate 20, second motor 21, lead screw 22 and lead screw cover 23, be provided with slide rail 24 on the rack 19, sliding plate 20 with rack 19 sliding connection, and be located on the slide rail 24, second motor 21 with stirring pond 8 can be dismantled and be connected, the output of second motor 21 is provided with lead screw 22, be provided with on the lead screw 22 lead screw cover 23, lead screw cover 23 with sliding plate 20 can be dismantled and be connected, sliding plate 20 with first motor 11 can be dismantled and be connected.
In this embodiment, the second motor 21 is started to drive the sliding plate 20 to slide in the sliding rail 24 through the lead screw 22, so that the stirring device on the sliding plate 20 can stir various parts in the stirring tank 8, and the stirring effect is better.
Further, the placing frame 19 comprises four supporting legs 25 and a bottom plate 26, the sliding rail 24 is arranged on the bottom plate 26, two supporting legs 25 are symmetrically arranged on two sides of the bottom plate 26, and each supporting leg 25 is detachably connected with the stirring tank 8.
In this embodiment, each of the supporting legs 25 is fixedly connected to the bottom plate 26, and is manufactured by using an integral molding technique, so that the structure is firmer.
Further, solid-liquid separator 5 still includes two link 27, every the one end of link 27 all with the connection can be dismantled to the inner wall of recovery tower 3, every the other end of link 27 all with the connection can be dismantled to the separator 16, every link 27 all includes connecting plate 28, diaphragm 29, first arc connecting block 30 and second arc connecting block 31, connecting plate 28 with the inner wall screwed connection of recovery tower 3, diaphragm 29 with connecting plate 28 fixed connection, the one end of first arc connecting block 30 with the one end of second arc connecting block 31 all with diaphragm 29 bolted connection, the other end of first arc connecting block 30 with the other end bolted connection of second arc connecting block 31.
In this embodiment, the connecting plate 28 is screwed to the inner wall of the recovery tower 3, and the first arc-shaped connecting block 30 and the second arc-shaped connecting block 31 are bolted to the transverse plate 29, so that the connecting frame 27 fixes the separation body 16 to the inner wall of the recovery tower 3, and plays a role of auxiliary support, thereby making the structure of the separation body 16 more stable.
Further, be provided with solid particle recovery unit on the pond 9 of stewing, solid particle recovery unit includes recovery disc 32 and hoist mechanism, recovery disc 32 is located the bottom in pond 9 of stewing, hoist mechanism with pond 9 of stewing can dismantle the connection, and be located the top in recovery pool, hoist mechanism's extraction end with recovery disc 32 can dismantle the connection.
In this embodiment, during maintenance shutdown, the lifting framework pulls the recovery tray 32 to ascend, so as to clean the solid particles settled on the recovery tray 32.
Further, the hoisting framework comprises a mounting frame 33, a pulley 34, a third motor 35, a winch 36, a hinge 37 and a cable 38, the mounting frame 33 is detachably connected to the standing pool 9, the mounting frame 33 is far away from one end of the standing pool 9, the pulley 34 is arranged at the end of the standing pool 9, the winch 36 is sleeved at the output end of the third motor 35, the hinge 37 is arranged on the winch 36, the hinge 37 bypasses the pulley 34, the cable 38 is arranged at the end, far away from the winch 36, of the cable 38, and the recovery disc 32 is detachably connected to the cable 38.
In this embodiment, the third motor 35 is activated, the winch 36 pulls the hinge 37 to ascend, so that the traction cable 38 pulls the recovery disk 32 to ascend, thereby facilitating cleaning of the solid particles on the recovery disk 32.
Referring to fig. 6, the present invention further provides a continuous solid-liquid separation method for o-toluidine production wastewater, which uses the continuous solid-liquid separation apparatus for o-toluidine production wastewater, and comprises the following steps:
s1: discharging the o-toluidine production wastewater into the stirring tank 8, and adding a coagulant from the dosing hopper 2;
s2: the first motor 11 is used for driving the stirring fan 13 to fully stir the wastewater and the coagulant in the stirring tank 8, the stirred mixed solution flows into the standing tank 9 for standing, after solid particles are settled, the valve 10 is opened to convey the mixed solution into the recovery tower 3 for azeotropic treatment;
s3: the waste water after azeotropic treatment flows into the collecting hopper 14 and is conveyed into the separating body 16 from the feeding pipe 15;
s4: utilize the helical structure extension of separator 16 subsides the separation time thus make solid particle subside in recess 17, liquid upwards utilizes retrieve liquid level control valve 4 and discharge to retrieve reboiler 6 and get into subsequent processing to avoid the catalyst in the waste water to deposit in recovery tower 3 bottom, the jam of the drainage pipe of recovery tower 3 that causes of different degrees.
Discharging o-toluidine production wastewater into the stirring tank 8, putting a coagulant into the dosing hopper 2, driving the stirring fan blades 13 by the first motor 11 to fully stir the wastewater and the coagulant in the stirring tank 8, allowing the stirred mixed solution to flow into the standing tank 9 for standing, opening the valve 10 after solid particles are settled, conveying the mixed solution into the recovery tower 3 for azeotropic treatment, allowing the wastewater after the azeotropic treatment to flow into the collecting hopper 14, conveying the wastewater from the feed pipe 15 into the separating body 16, extending the settling and separating time by using the spiral structure of the separating body 16 so as to allow solid particles to settle in the groove 17, discharging the liquid upwards to the recovery reboiler 6 by using the recovery liquid level regulating valve 4 for subsequent treatment, and preventing a catalyst in the wastewater from settling at the bottom of the recovery tower 3, and to varying degrees, causes clogging of the water discharge line of the recovery tower 3.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A continuous solid-liquid separation device for o-toluidine production wastewater, which is characterized in that,
the device comprises a primary separation tank, a stirring device, a medicine feeding hopper, a recovery tower, a recovery liquid level regulating valve, a solid-liquid separator and a recovery reboiler, wherein a partition plate is arranged in the primary separation tank, the primary separation tank is divided into a stirring tank and a standing tank by the partition plate, the medicine feeding hopper is arranged above the stirring tank, the stirring device is arranged inside the stirring tank, the standing tank is connected with a pipeline of the recovery tower, a valve is arranged on the standing tank, the recovery liquid level regulating valve is arranged on the recovery tower, one end of the recovery liquid level regulating valve is connected with a pipeline of the recovery reboiler, the other end of the recovery liquid level regulating valve is connected with a pipeline of the solid-liquid separator, the recovery is positioned outside the recovery tower, and the solid-liquid separator is positioned inside the recovery tower;
the stirring device comprises a first motor, a stirring shaft and stirring blades, the first motor is detachably connected with the stirring tank, and is positioned above the stirring tank, the output end of the first motor is sleeved with the stirring shaft, the stirring fan blades are detachably connected with the stirring shaft, and is positioned at one end of the stirring shaft, which is far away from the first motor, and is positioned in the stirring tank, the solid-liquid separator comprises a collecting hopper, a feeding pipe and a separating body, the collecting hopper is detachably connected with the inner wall of the recovery tower, the bottom of the collecting hopper is provided with the feeding pipe, the separating body is arranged in a spiral structure, the feeding end of the separating body is detachably connected with the feeding pipe, and is located the inlet pipe is kept away from the one end of collecting the fill, the output of the separator with retrieve the liquid regulating valve and can dismantle the connection, the inside of separator is provided with the recess.
2. The continuous solid-liquid separation apparatus for producing waste water of o-toluidine according to claim 1, wherein,
the stirring tank is provided with a sliding frame, the sliding frame comprises a placing frame, a sliding plate, a second motor, a lead screw and a lead screw sleeve, a sliding rail is arranged on the placing frame, the sliding plate is in sliding connection with the placing frame and is located on the sliding rail, the second motor is detachably connected with the stirring tank, the output end of the second motor is provided with the lead screw, the lead screw is provided with the lead screw sleeve, the lead screw sleeve is detachably connected with the sliding plate, and the sliding plate is detachably connected with the first motor.
3. The continuous solid-liquid separation apparatus for producing waste water of o-toluidine according to claim 2, wherein,
the rack includes four supporting legss and bottom plate, be provided with on the bottom plate the slide rail, the bilateral symmetry of bottom plate is provided with two the supporting legs, every the supporting legs all with the stirring pond can be dismantled and be connected.
4. The continuous solid-liquid separation apparatus for producing waste water of o-toluidine according to claim 1, wherein,
the solid-liquid separator still includes two link, every the one end of link all with the inner wall of recovery tower can be dismantled and be connected, every the other end of link all with the separator can be dismantled and be connected.
5. The continuous solid-liquid separation apparatus for producing waste water of o-toluidine according to claim 4, wherein,
every the link all includes connecting plate, diaphragm, first arc connecting block and second arc connecting block, the connecting plate with the inner wall screwed connection of recovery tower, the diaphragm with connecting plate fixed connection, the one end of first arc connecting block with the one end of second arc connecting block all with diaphragm bolted connection, the other end of first arc connecting block with the other end bolted connection of second arc connecting block.
6. A continuous solid-liquid separation method for o-toluidine industrial wastewater using the continuous solid-liquid separation apparatus for o-toluidine industrial wastewater according to claim 1, characterized by comprising the steps of:
discharging the o-toluidine production wastewater into the stirring tank, and adding a coagulant from the dosing hopper;
the first motor is utilized to drive the stirring fan blades to fully stir the wastewater and the coagulant in the stirring tank, the stirred mixed solution flows into the standing tank to stand, after solid particles are settled, the valve is opened to convey the mixed solution into the recovery tower, and azeotropic treatment is carried out;
the waste water after azeotropic treatment flows into the collecting hopper and is conveyed into the separator from the feeding pipe;
utilize thereby the helical structure extension of separator subsides the separation time and makes solid particle subside in the recess, liquid upwards utilizes retrieve the liquid level control valve and discharge to retrieve the reboiler and get into subsequent processing to avoid the catalyst in the waste water to deposit in the recovery tower bottom, the jam of the drainage pipe of recovery tower that causes to different extent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011388089.5A CN112499870B (en) | 2020-12-01 | 2020-12-01 | Device and method for continuous solid-liquid separation of o-toluidine production wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011388089.5A CN112499870B (en) | 2020-12-01 | 2020-12-01 | Device and method for continuous solid-liquid separation of o-toluidine production wastewater |
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| Publication Number | Publication Date |
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| CN112499870A true CN112499870A (en) | 2021-03-16 |
| CN112499870B CN112499870B (en) | 2023-07-07 |
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| CN202011388089.5A Active CN112499870B (en) | 2020-12-01 | 2020-12-01 | Device and method for continuous solid-liquid separation of o-toluidine production wastewater |
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| CN112499870B (en) | 2023-07-07 |
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