CN113354157B

CN113354157B - Pigment wastewater treatment process

Info

Publication number: CN113354157B
Application number: CN202110797550.0A
Authority: CN
Inventors: 罗福文; 刘小付; 高月芬
Original assignee: Hangzhou Xiaoshan Environmental Chemical Co ltd
Current assignee: Hangzhou Xiaoshan Environmental Chemical Co ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2022-07-01
Anticipated expiration: 2041-07-14
Also published as: CN113354157A

Abstract

The application relates to a pigment wastewater treatment process, which belongs to the technical field of wastewater treatment and comprises the following steps: s1, conveying the wastewater into a collection sedimentation tank for sedimentation; s2, conveying the supernatant in the collecting and settling tank to a catalytic oxidation tank, adding an oxidant, a flocculating agent and a pH regulator into the catalytic oxidation tank, and settling for 2-4 hours; s3, conveying the supernatant in the catalytic oxidation tank to an aeration reaction tank, and pumping out impurities settled in the catalytic oxidation tank for treatment; s4, fully stirring the wastewater in the aeration reaction tank, conveying the wastewater in the aeration reaction tank to a flocculation sedimentation tank, adding a flocculating agent into the flocculation sedimentation tank, and then settling again; s5, conveying the supernatant in the flocculation sedimentation tank to a filtration and purification tank, and conveying the wastewater entering the filtration and purification tank to a clear water discharge tank after the wastewater is filtered and purified by a filtration and purification component. This application has the SS that reduces to get into in the wastewater discharge pond to improve the effect of waste water treatment effect.

Description

Pigment wastewater treatment process

Technical Field

The application relates to the technical field of wastewater treatment, in particular to a wastewater treatment process for pigments.

Background

Pigment production is one of the important categories of fine chemical production; in the production process of both organic pigments and inorganic pigments, waste water causing serious pollution to the environment is generated, and the waste water cannot be directly discharged, so that the waste water needs to be treated to reach the discharge standard before being discharged.

The existing pigment wastewater treatment process comprises the following steps: s1, collecting the wastewater into a wastewater collection tank, and adding an acidity regulator to regulate the pH value of the wastewater; and S2, conveying the collected wastewater into a flocculation tank, adding a flocculating agent into the flocculation tank, settling for 2 hours, conveying the supernatant into a wastewater discharge tank, and finally pumping out sludge at the bottom of the flocculation tank to finish treatment.

In view of the above-mentioned related arts, the inventors of the present invention have considered that there is a defect that the liquid entering the wastewater discharge tank is still likely to have a large amount of SS remaining therein, resulting in a low wastewater treatment effect.

Disclosure of Invention

In order to reduce SS entering a wastewater discharge tank and improve the wastewater treatment effect, the application provides a wastewater treatment process of pigment.

The pigment wastewater treatment process adopts the following technical scheme:

a pigment wastewater treatment process comprises the following steps:

s1, conveying the wastewater into a collection sedimentation tank for sedimentation;

s2, conveying the supernatant in the collecting and settling tank to a catalytic oxidation tank, pumping out sludge in the collecting and settling tank for treatment, adding an oxidant, a flocculating agent and a pH regulator into the catalytic oxidation tank, and settling for 2-4 hours;

s3, conveying the supernatant in the catalytic oxidation tank to an aeration reaction tank, and pumping out impurities settled in the catalytic oxidation tank for treatment;

s4, fully stirring the wastewater in the aeration reaction tank, conveying the wastewater in the aeration reaction tank to a flocculation sedimentation tank, adding a flocculating agent into the flocculation sedimentation tank, and then settling again;

s5, conveying the supernatant in the flocculation sedimentation tank to the filtration and purification tank, pumping out the impurities settled in the flocculation sedimentation tank for treatment, and conveying the wastewater entering the filtration and purification tank to the clear water discharge tank after the wastewater is filtered and purified by the filtration and purification component.

Through adopting above-mentioned technical scheme, pigment waste water cools off when collecting to subside in the sedimentation tank and tentatively subsiding, waste water after subsiding gets into in the catalytic oxidation pond, and add the oxidant, flocculating agent and PH regulator subsides, with CODcr and SS in the reduction waste water, the supernatant after will subsiding is carried to the aeration reaction pond again, carry into behind the intensive mixing and carry out the interpolation and the settlement of flocculating agent in the flocculation sedimentation tank, with CODcr and the SS of getting rid of waste water once more, finally carry into the filtration purification pond with the supernatant in the flocculation sedimentation tank, the filtration purification subassembly filters and purifies it, the SS that gets into in the waste water discharge pond has been reduced, the effect that improves the waste water treatment effect has been reached.

Optionally, in S5, the filtering and purifying assembly includes a filtering cloth layer and an activated carbon layer, both the filtering cloth layer and the activated carbon layer are installed in the filtering and purifying tank, and the filtering cloth layer is located below the activated carbon layer; the side wall of the filtering and purifying tank is communicated with a water inlet pipe and a water outlet pipe, the water inlet pipe is positioned below the filter cloth layer, and the water outlet pipe is positioned above the activated carbon layer.

By adopting the technical scheme, the supernatant of the flocculation sedimentation tank is sent into the filtration and purification tank through the water inlet pipe under high pressure, the wastewater entering the filtration and purification tank is filtered by the filter cloth layer after being collected to a certain height, then the wastewater is accumulated, the wastewater filtered by the filter cloth layer is purified by the activated carbon layer, and the wastewater above the activated carbon layer can flow out through the water outlet pipe along with the increase of the wastewater entering the filtration and purification tank; along with rising of water level in the filtration purification pond, SS in the waste water also subsides along with time, for from top to bottom filtering in proper order, has reduced the work burden on filter cloth layer and activated carbon layer, and then has improved the filtration purification efficiency of waste water.

Optionally, an annular plate is connected to the inside of the filtering and purifying tank in a sliding manner, the circumferential outer side wall of the annular plate is attached to the circumferential inner side wall of the filtering and purifying tank, a filtering cloth layer and an activated carbon layer are both arranged in the annular plate, and a lifting device for driving the annular plate to lift is arranged in the filtering and purifying tank; one side of the annular plate close to the water inlet pipe is provided with a long-strip-shaped water inlet hole, one side of the annular plate close to the water outlet pipe is provided with a long-strip-shaped water outlet hole, and the water inlet pipe and the water outlet pipe are communicated with the interior of the filtering and purifying tank all the time.

By adopting the technical scheme, after the wastewater is treated for a long time and more impurities are accumulated at the bottom of the filtering and purifying tank, the annular plate can be driven to descend by the lifting device, so that the filtering cloth layer compacts the impurities, the water in the impurities is extruded, and the treatment efficiency is improved; in order to improve the filtering efficiency of the filter cloth layer, the annular plate can be lifted, so that the water inlet pipe is positioned at the top end of the water inlet hole, and the distance between the water inlet pipe and the filter cloth layer is shortened; when enough waste water is in the filtering and purifying tank, the annular plate can be lifted, so that the upper surface of the activated carbon layer is positioned at the water outlet pipe, and the water outlet efficiency is improved.

Optionally, a plurality of sliders are fixed to the circumferential outer side wall of the annular plate, and a plurality of sliding grooves for sliding of the sliders are formed in the circumferential inner side wall of the filtering and purifying tank.

Through adopting above-mentioned technical scheme, when the annular plate goes up and down, the slider slided in the spout, has improved the stability of sliding of annular plate.

Optionally, the filter cloth layer comprises an annular outer frame and a cloth body fixed on the outer frame, the outer frame slides in the annular plate, and the annular plate is provided with a plurality of groups of driving assemblies for driving the outer frame to lift; diapire slides in the filtration purification pond and is connected with the scraper blade, and the inside drive arrangement who is used for driving the scraper blade and slides that is equipped with of filtration purification pond, the bottom of a filtration purification pond lateral wall is equipped with just to the clearance door that the scraper blade set up.

Through adopting above-mentioned technical scheme, when needing to clear up the sedimentary impurity in the filtration purification pond, open the cleaning door, drive the scraper blade through drive arrangement and carry out striking off of impurity to drive assembly drives the decline of filter cloth layer, makes cloth body lower surface and scraper blade upper surface laminating, and the scraper blade can strike off the remaining impurity of cloth body lower surface when carrying out impurity and striking off, has improved the cleaning efficiency of filtration purification pond and the cleaning efficiency on filter cloth layer.

Optionally, the driving assembly includes a driving motor, a gear, a rack, and a limiting frame, the annular plate has a plurality of moving grooves on its upper end surface, the rack slides in the moving grooves, the rack is fixed to the outer frame, the driving motor is fixed to the top end of the annular plate and coaxially fixed to the gear, the gear is engaged with the rack, the limiting frame is fixed to the annular plate, and the rack passes through the limiting frame.

Through adopting above-mentioned technical scheme, start driving motor and make gear revolve, the gear drives the rack and goes up and down in the shifting chute, and spacing frame is injectd the slip direction of rack, has improved the efficiency of sliding on filter cloth layer.

Optionally, a telescopic groove is formed in the upper surface of the scraper, a lifting plate is connected to the telescopic groove in a sliding mode, a plurality of springs are fixed in the telescopic groove, and the top ends of the springs are fixed to the lower surface of the lifting plate.

Through adopting above-mentioned technical scheme, drive assembly drives the decline of filter cloth layer for filter cloth layer pushes down the lifter plate, and the lifter plate descends at flexible inslot, and the spring compresses, and the scraper blade is at the in-process that removes this moment, and the lifter plate upper surface supports tightly all the time at the cloth body lower surface, has improved the clearance effect of cloth body lower surface.

Optionally, a distance is left between the bottom end of the moving groove and the lower end face of the annular plate.

Through adopting above-mentioned technical scheme, if the meshing department of rack and gear breaks down, then the rack still can remain in removing the inslot, has reduced the probability that the rack bottom breaks away from the annular plate, has improved the maintenance convenience.

Optionally, the scraper blade is just to the lateral wall bottom mounting of clearance door has lower scraping strip, and lower scraping strip lower surface and bottom wall butt in the filtration purification pond, and lower scraping strip is just to one side of clearance door for sharp limit setting.

Through adopting above-mentioned technical scheme, when the scraper blade removed, the sharp limit of scraping the strip down shoveled the impurity on the diapire in the filtration purification pond, had improved the cleaning efficiency of impurity in the filtration purification pond.

Optionally, the lifting plate is fixed with an upper scraping strip opposite to the top end of the side wall of the cleaning door, the upper surface of the upper scraping strip is flush with the upper surface of the lifting plate, and one side of the upper scraping strip opposite to the cleaning door is provided with a sharp edge.

Through adopting above-mentioned technical scheme, when the scraper blade drove the lifter plate and removes, go up the scraping bar and shovel down the remaining impurity of cloth body lower surface, improved the cleaning efficiency of remaining impurity on the cloth body.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the catalytic oxidation tank, the aeration reaction tank and the flocculation sedimentation tank are used for removing CODcr and SS in the wastewater in a double-layer manner, and finally the filtering and purifying assembly is used for filtering and purifying the wastewater, so that the SS entering the wastewater discharge tank is reduced, and the effect of improving the wastewater treatment effect is achieved;

2. the annular plate is driven to descend by the lifting device, so that the filtering cloth layer compacts impurities, water in the impurities is squeezed out, and the treatment efficiency is improved;

3. drive the scraper blade through drive arrangement and carry out striking off of impurity to drive assembly drives the decline of filter cloth layer, makes cloth body lower surface and scraper blade upper surface laminating, has improved the cleaning efficiency of filtration purification pond and the cleaning efficiency on filter cloth layer.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present application;

FIG. 2 is a sectional view showing the water pipe;

FIG. 3 is a partial cross-sectional view showing the squeegee;

fig. 4 is a partial sectional view showing a spring.

In the figure, 1, a filtering and purifying tank; 11. a water inlet pipe; 12. a water outlet pipe; 13. cleaning the door; 2. a filtration and purification component; 21. a filter cloth layer; 211. an outer frame; 212. a cloth body; 22. an activated carbon layer; 3. an annular plate; 31. a lifting device; 32. a water inlet hole; 33. a water outlet hole; 34. a slider; 35. a chute; 36. a moving groove; 4. a drive assembly; 41. a drive motor; 42. a rotating shaft; 43. a gear; 44. a rack; 45. a limiting frame; 5. a squeegee; 51. a drive device; 52. a telescopic groove; 53. a lifting plate; 54. a spring; 55. scraping the strips; 56. and (6) mounting a scraping strip.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a pigment wastewater treatment process, which comprises the following steps:

and S1, conveying the wastewater into a collection sedimentation tank for sedimentation and cooling.

S2, conveying the supernatant in the collection sedimentation tank to a catalytic oxidation tank, pumping out sludge in the collection sedimentation tank for treatment, adding an oxidant, a flocculating agent and a pH regulator into the catalytic oxidation tank, fully stirring, and settling for 2-4 hours;

s4, fully stirring the wastewater in the aeration reaction tank, conveying the wastewater in the aeration reaction tank to a flocculation sedimentation tank, adding a flocculating agent into the flocculation sedimentation tank, and then settling for 2-4 hours;

s5, referring to figure 1, the supernatant in the flocculation sedimentation tank is conveyed into the filtration and purification tank 1 with an upper opening, the impurities settled in the flocculation sedimentation tank are pumped out for treatment, and the filtration and purification component 2 filters and purifies the wastewater entering the filtration and purification tank 1.

Referring to fig. 1 and 2, the filtering and purifying assembly 2 includes a filtering cloth layer 21 and an activated carbon layer 22; the filtering and purifying tank 1 is vertically connected with an annular plate 3 in a sliding manner, an activated carbon layer 22 is horizontally fixed in the annular plate 3, a filter cloth layer 21 is horizontally arranged and vertically slides in the annular plate 3, and the filter cloth layer 21 is positioned below the activated carbon layer 22; the two opposite sides of the annular plate 3 are respectively communicated with a water inlet pipe 11 and a water outlet pipe 12, the water inlet pipe 11 is positioned below the filter cloth layer 21, and the water outlet pipe 12 is positioned above the activated carbon layer 22; the annular plate 3 has just seted up inlet opening 32 and apopore 33 respectively to the lateral wall of inlet tube 11 and outlet pipe 12, and inlet opening 32 and apopore 33 are the bar form and vertical setting, and inlet tube 11 and outlet pipe 12 communicate with filtration purification pond 1 all the time.

A plurality of lifting devices 31 are fixed at the top end of the filtering and purifying tank 1, in the embodiment, the lifting devices 31 are air cylinders or hydraulic cylinders, the lifting devices 31 are fixed at the bottom end of the filtering and purifying tank 1, and the bottom end of the lifting devices 31 is fixed with the upper end surface of the annular plate 3; the top end of the filtering and purifying tank 1 is provided with a plurality of groups of driving components 4, and the driving components 4 are used for driving the filtering cloth layer 21 to lift.

The supernatant in the flocculation sedimentation tank is conveyed into the filtration and purification tank 1 through the water inlet pipe 11 under high pressure, and along with the rise of the water level in the filtration and purification tank 1, the wastewater flows out of the water outlet pipe 12 after sequentially passing through the filter cloth layer 21 and the activated carbon layer 22 and being filtered and purified. After the wastewater on the activated carbon layer 22 flows out, the lifting device 31 drives the annular plate 3 to slowly descend, so that more wastewater is filtered to the position above the activated carbon layer 22, the lifting device 31 quickly ascends the annular plate 3, the upper surface of the activated carbon layer 22 is located at the water outlet pipe 12, and the wastewater flows out of the water outlet pipe 12 again until the water above the activated carbon layer 22 flows out, so that the wastewater filtering and purifying efficiency is improved.

Referring to fig. 1 and 2, the filter cloth layer 21 includes an outer frame 211 and a cloth body 212, the outer frame 211 is slidably connected in the annular plate 3, and the cloth body 212 is fixed on the circumferential inner side wall of the housing; the driving components 4 are two groups and are respectively positioned at two opposite sides of the filtering and purifying tank 1.

The driving component 4 comprises a driving motor 41 horizontally fixed on the upper end surface of the filtering and purifying tank 1, a rotating shaft 42 rotatably connected on the upper end surface of the filtering and purifying tank 1 and coaxially fixed with the driving motor 41, two gears 43 coaxially and fixedly sleeved on the rotating shaft 42, two racks 44 respectively meshed with the two gears 43, and a plurality of limiting frames 45 fixed on the filtering and purifying tank 1; two vertical settings and inboard opening setting shifting chute 36 have been seted up respectively to the relative both sides of annular plate 3 upper surface, leave the distance between 36 bottom in shifting chute to the annular plate 3 lower terminal surface, and rack 44 is vertical lift in shifting chute 36 and spacing frame 45, and all racks 44 are all fixed with frame 211.

The driving motor 41 is started to enable the rotating shaft 42 to rotate, the two gears 43 simultaneously drive the two racks 44 to descend, the racks 44 drive the shell to descend, impurities accumulated at the bottom in the filtering and purifying tank 1 can be compacted, water in the filtering and purifying tank is squeezed out, and the wastewater treatment efficiency is improved.

Referring to fig. 3, the circumferential outer side wall of the annular plate 3 is fixed with a plurality of sliding blocks 34, the circumferential inner side wall of the filtering and purifying tank 1 is provided with a plurality of vertically arranged sliding grooves 35, and the sliding blocks 34 slide in the sliding grooves 35, so that the lifting stability of the annular plate 3 is improved.

Referring to fig. 3 and 4, one side bottom that filtration purification pond 1 is adjacent to inlet tube 11 articulates there is cleaning door 13, bottom in the filtration purification pond 1 slides and is connected with scraper blade 5, one side level that filtration purification pond 1 deviates from cleaning door 13 is fixed with a plurality of drive arrangement 51, drive arrangement 51 can be cylinder or pneumatic cylinder in this embodiment, drive arrangement 51 is fixed on filtration purification pond 1 lateral wall, drive arrangement 51's piston rod is fixed with scraper blade 5 in stretching into filtration purification pond 1, scraper blade 5 is just to cleaning door 13 setting.

The upper surface of the scraper 5 is vertically provided with a telescopic groove 52, a lifting plate 53 is connected in the telescopic groove 52 in a sliding manner, a plurality of springs 54 are fixed on the bottom wall of the telescopic groove 52, the top ends of the springs 54 are fixed with the lower surface of the lifting plate 53, and the springs 54 are always in a compression state. Make filter cloth layer 21 lower surface flush with the lower terminal surface of annular plate 3 through drive assembly 4 earlier, can make scraper blade 5 and lifter plate 53 push out clearance door 13 with the impurity of filter cloth layer 21 below through drive arrangement 51, lifter plate 53 upper surface supports tightly filter cloth layer 21 lower surface all the time simultaneously, and scraper blade 5 strikes off the impurity of filtering and purifying pond 1 bottom, and lifter plate 53 strikes off filter cloth layer 21 lower surface, has improved the cleaning efficiency of impurity.

Referring to fig. 3 and 4, a horizontally arranged lower scraping strip 55 is fixed at the bottom end of the side wall of the scraping plate 5 facing the cleaning door 13, and the side of the lower scraping strip 55 facing the cleaning door 13 is a sharp edge and is abutted against the bottom wall of the filtration and purification tank 1. An upper scraping strip 56 which is horizontally arranged is fixed at the top end of the side wall of the lifting plate 53 facing the cleaning door 13, and one side of the upper scraping strip 56 facing the cleaning door 13 is a sharp edge and is tightly propped against the lower surface of the filter cloth layer 21. When the scraper 5 and the lifting plate 53 move, the lower scraper bar 55 and the upper scraper bar 56 can improve the efficiency of scraping off impurities from the bottom wall and the lower surface of the filter cloth layer 21 in the filtration purification tank 1.

And S6, pumping the filtered and purified wastewater into a clean water discharge tank through the water outlet pipe 12.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A pigment wastewater treatment process is characterized in that: the method comprises the following steps:

s2, conveying the supernatant in the collecting and settling tank to a catalytic oxidation tank, pumping out sludge in the collecting and settling tank for treatment, adding an oxidant, a flocculating agent and a p H regulating agent into the catalytic oxidation tank, and settling for 2-4 hours;

s5, conveying the supernatant in the flocculation sedimentation tank into a filtering and purifying tank (1), pumping out impurities settled in the flocculation sedimentation tank for treatment, and conveying the wastewater entering the filtering and purifying tank (1) into a clear water discharge tank after filtering and purifying by a filtering and purifying component (2); the filtering and purifying component (2) comprises a filtering cloth layer (21) and an activated carbon layer (22), the filtering cloth layer (21) and the activated carbon layer (22) are both arranged in the filtering and purifying tank (1), and the filtering cloth layer (21) is positioned below the activated carbon layer (22); the side wall of the filtering and purifying tank (1) is communicated with a water inlet pipe (11) and a water outlet pipe (12), the water inlet pipe (11) is positioned below the filtering cloth layer (21), and the water outlet pipe (12) is positioned above the activated carbon layer (22); the filtering and purifying tank (1) is connected with an annular plate (3) in a sliding manner, the circumferential outer side wall of the annular plate (3) is attached to the circumferential inner side wall of the filtering and purifying tank (1), a filtering cloth layer (21) and an activated carbon layer (22) are both arranged in the annular plate (3), and a lifting device (31) for driving the annular plate (3) to lift is arranged in the filtering and purifying tank (1); one side of the annular plate (3) close to the water inlet pipe (11) is provided with a long strip-shaped water inlet hole (32), one side of the annular plate (3) close to the water outlet pipe (12) is provided with a long strip-shaped water outlet hole (33), and the water inlet pipe (11) and the water outlet pipe (12) are communicated with the inside of the filtering and purifying tank (1) all the time.

2. The pigment wastewater treatment process according to claim 1, wherein: a plurality of sliding blocks (34) are fixed on the circumferential outer side wall of the annular plate (3), and a plurality of sliding grooves (35) for the sliding blocks (34) to slide are formed in the circumferential inner side wall of the filtering and purifying tank (1).

3. The pigment wastewater treatment process according to claim 1, wherein: the filtering cloth layer (21) comprises an annular outer frame (211) and a cloth body (212) fixed on the outer frame (211), the outer frame (211) slides in the annular plate (3), and a plurality of groups of driving assemblies (4) used for driving the outer frame (211) to lift are arranged on the annular plate (3); the bottom wall slides in filtration purification pond (1) and is connected with scraper blade (5), and filtration purification pond (1) inside is equipped with and is used for driving drive arrangement (51) that scraper blade (5) slided, and the bottom of filtration purification pond (1) a lateral wall is equipped with just to clearance door (13) that scraper blade (5) set up.

4. A pigment wastewater treatment process according to claim 3, characterized in that: drive assembly (4) include driving motor (41), gear (43), rack (44), spacing frame (45), a plurality of shifting chutes (36) have been seted up to annular plate (3) up end, rack (44) slide in shifting chute (36), rack (44) are fixed with frame (211), driving motor (41) are fixed on annular plate (3) top, and with gear (43) coaxial fixed, gear (43) and rack (44) meshing, spacing frame (45) are fixed on annular plate (3), rack (44) are followed spacing frame (45) and are passed.

5. A pigment wastewater treatment process according to claim 3, characterized in that: the upper surface of the scraper (5) is provided with a telescopic groove (52), a lifting plate (53) is connected in the telescopic groove (52) in a sliding manner, a plurality of springs (54) are fixed in the telescopic groove (52), and the top ends of the springs (54) are fixed on the lower surface of the lifting plate (53).

6. The pigment wastewater treatment process according to claim 4, wherein: and a distance is reserved between the bottom end of the moving groove (36) and the lower end face of the annular plate (3).

7. The pigment wastewater treatment process according to claim 4, wherein: scraper blade (5) are just fixed with down scraping strip (55) to the lateral wall bottom of cleaning door (13), scrape strip (55) lower surface and filtration purification pond (1) inner bottom wall butt down, scrape strip (55) down and just be sharp limit setting to one side of cleaning door (13).

8. The pigment wastewater treatment process according to claim 5, wherein: an upper scraping strip (56) is fixed at the top end of the side wall of the lifting plate (53) opposite to the cleaning door (13), the upper surface of the upper scraping strip (56) is flush with the upper surface of the lifting plate (53), and one side of the upper scraping strip (56) opposite to the cleaning door (13) is provided with a sharp edge.