CN116216920B - Breed effluent treatment plant - Google Patents
Breed effluent treatment plant Download PDFInfo
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- CN116216920B CN116216920B CN202310514479.XA CN202310514479A CN116216920B CN 116216920 B CN116216920 B CN 116216920B CN 202310514479 A CN202310514479 A CN 202310514479A CN 116216920 B CN116216920 B CN 116216920B
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- slow
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/103—Textile-type packing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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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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- 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
- C02F2303/16—Regeneration of sorbents, filters
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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
- 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
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to the technical field of wastewater purification treatment, in particular to cultivation wastewater treatment equipment. The technical problems of the invention are as follows: in the prior art, suspended matters trapped by the filter material are accumulated in the filter layer, the water flow resistance of the filter layer is gradually increased, a large amount of flushing water is used for flushing the biological film when back flushing is adopted, so that the biological film is easy to damage and fall off, and meanwhile, the back flushing enables the filter material to turn over and embed the biological film, so that the regeneration of the biological film is seriously influenced, and the biochemical treatment effect is influenced. The technical scheme of the invention is as follows: the cultivation waste water treatment equipment comprises a slow filter tank, a waste water pipe and the like; the slow filter tank is provided with a waste pipe for the inlet of the cultivation wastewater. The invention realizes the isolation of the rolled biological film by the isolating strip, avoids the damage of the biological film caused by the direct contact extrusion of the biological film and the filter cloth, increases the adhesion area of the biological film by the brush hair on the isolating strip, prevents the biological film from falling off and being damaged from the filter cloth during the rolling, and avoids the problem of poor biochemical treatment effect in the cultivation wastewater treatment.
Description
Technical Field
The invention relates to the technical field of wastewater purification treatment, in particular to cultivation wastewater treatment equipment.
Background
After the biological slow filter works for a period of time, the trapped suspended matters are accumulated in the filter layer, the water flow resistance of the filter layer is gradually increased, so that the structure of the filter layer is damaged, the quality of effluent water is deteriorated, the filter layer is required to be washed by reverse water flow regularly, so that the filter layer is regenerated, the biological slow filter restarts to work normally, and in the prior art, a large amount of backwash water in the backwash process washes the biological film, so that the biological film is easy to damage and fall off, and the biochemical treatment effect is influenced; meanwhile, the back flushing treatment method enables the filter material to turn over and embed the biological film, seriously influences the regeneration of the biological film, and needs to wait for the growth of the biological film for a longer time or inoculate the biological film again, so that the time or economic cost is increased.
Disclosure of Invention
In order to overcome the defects that suspended matters trapped by filter materials are accumulated in a filter layer, the water flow resistance of the filter layer is gradually increased, a large amount of flushing water is used for flushing the biological film, so that the biological film is easy to damage and fall off, and simultaneously, the flushing water enables the filter materials to turn over to embed the biological film, so that the regeneration of the biological film is seriously influenced and the biochemical treatment effect is influenced in the prior art, the invention provides the cultivation wastewater treatment equipment.
The technical scheme of the invention is as follows: the cultivation wastewater treatment equipment comprises a slow filter tank, a wastewater pipe, a bearing plate, a first water inlet pipe and a first water outlet pipe; a waste pipe for the inlet of the cultivation wastewater is arranged on the slow filter tank; a bearing plate is arranged in the slow filter tank; the lower part of the left side of the slow filter tank is provided with a first water inlet pipe for back flushing water inlet; a first water outlet pipe for discharging filtered cultivation wastewater is arranged at the lower part of the left side of the slow filter tank; the filter comprises a filter material, a first filter cap, filter cloth and a retraction assembly; a filter material for physically filtering the cultivation wastewater is paved on the bearing plate; a plurality of first filter caps capable of blocking filter materials from flowing out are arranged on the bearing plate; the upper surface of the filter material is provided with filter cloth capable of culturing and bearing biological membranes; a winding and unwinding component for winding the filter cloth is arranged in the slow filter tank.
More preferably, the filter further comprises a water baffle, and the slow filter is provided with the water baffle; both the two water baffles are inclined upwards by forty-five degrees with the inner wall of the slow filter, and the water outlet of the waste pipe is positioned in the included angle of the water baffles.
More preferably, the winding and unwinding assembly comprises a first motor, a winding roller, a second motor, a rope wheel, a rope and a fixed block; the slow filter is provided with a first motor; a winding roller for winding the filter cloth is fixedly connected to the conveying end of the first motor; the left side of the slow filter tank is provided with two second motors which are symmetrical in front-back direction; two rope wheels are respectively arranged on the two second motors; the rope head ends are connected to the two rope pulleys; the tail ends of the two ropes are connected with the fixed block; the upper surface of the left side of the filter cloth is provided with a fixed block; the upper surface of the right side of the filter cloth is fixedly connected with the wind-up roll.
More preferably, the toothbrush further comprises a spacer and bristles; a plurality of isolating strips which can isolate the biological membrane are arranged on the filter cloth; the left sides of the isolation strips are provided with bristles.
More preferably, the cleaning system is further comprised, and the cleaning system comprises a second water inlet pipe and a first spray head; a second water inlet pipe is arranged on the right side of the slow filter tank; the second water inlet pipe is provided with a plurality of first spray heads with water outlets inclined downwards by forty-five degrees, and the first spray heads are positioned right above the wind-up roll.
More preferably, the first spray head is obliquely arranged on the second water inlet pipe downwards at forty-five degrees.
More preferably, the cleaning system further comprises a third water inlet pipe and a second spray head; a third water inlet pipe is arranged on the right side of the slow filter tank, is positioned right below the second water inlet pipe and is higher than the wind-up roll; a plurality of second spray heads capable of dripping water are arranged on the third water inlet pipe; the water outlet of the second spray head is positioned between the upper side quarter point and the right side quarter point of the wind-up roll, and the included angle between the water outlet and the wind-up roll is between thirty and forty-five degrees.
More preferably, the rubber sheet also comprises an annular rubber sheet; the plurality of first filter caps are respectively provided with an annular rubber sheet which can intercept sludge; the upper side of the annular rubber sheet is fixed at the upper part of the middle part of the first filter cap, and the lower side of the annular rubber sheet covers the bottom of the filter hole of the first filter cap.
More preferably, the lower side of the annular rubber sheet is attached to the bottom of the filtering hole of the first filtering cap, and the upper side of the annular rubber sheet is in an openable state.
More preferably, the device also comprises a waste water discharging system, wherein the waste water discharging system comprises a second water outlet pipe, a second filter cap, a bracket, a cylinder, a baffle, a waste water tank and a third water outlet pipe; the left side of the slow filter tank is provided with a wastewater tank which can discharge backwash wastewater, and the wastewater tank is higher than the filter material, so that the filter material is prevented from being discharged into the wastewater tank along with backwash wastewater during backwash; the bottom of the wastewater tank is connected with a third water outlet pipe capable of discharging backwash wastewater; the left side of the upper part of the slow filter is provided with a second water outlet pipe which is electrically connected and communicated with a third water outlet pipe, and the height of the second water outlet pipe is positioned at the bottom of the filter material; a second filter cap capable of intercepting filter materials is arranged on the second water outlet pipe; the upper part of the upper left side of the slow filter tank is provided with a bracket; the bracket is provided with an air cylinder which can drive the baffle plate to move up and down; the output end of the air cylinder is fixedly connected with a baffle plate which can intercept wastewater.
The beneficial effects are that: according to the invention, the isolating strips on the filter cloth isolate the biological film on the rolled filter cloth, so that the biological film is prevented from being damaged due to direct contact extrusion of the biological film and the filter cloth, and meanwhile, the brush hair on the isolating strips increases the attachment area of the biological film, so that the biological film cannot fall off and be damaged from the filter cloth during rolling, and the problem of poor biochemical treatment effect in subsequent cultivation wastewater treatment is avoided.
When the water flow passes through the first spray head, the water flow can not damage and drop the biological film which keeps active while flushing the aged biological film, the aged biological film is easy to drop after losing activity, and the biological film which keeps active has certain adhesiveness, so that the aged biological film is prevented from falling off to occupy space.
When part of sludge flows to the upper surface of the supporting plate, the annular rubber sheet on the first filter cap intercepts the sludge flowing to the supporting plate, so that a large amount of sludge is prevented from penetrating to the bottom of the slow filter through the first filter cap, and the water quality of the filtered cultivation wastewater is influenced.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a partial cross-sectional view of the present invention;
FIG. 4 is a schematic view of a partial perspective structure of the present invention;
FIG. 5 is an enlarged view of the area A of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic perspective view of a cleaning system according to the present invention;
FIG. 7 is a schematic perspective view of a mud guard system according to the present invention;
FIG. 8 is a partial cross-sectional view of a waste water drainage system of the present invention.
Marked in the figure as: 1-slow filter tank, 2-water baffle, 3-waste water pipe, 4-filter material, 5-bearing plate, 6-first filter cap, 7-filter cloth, 8-first water inlet pipe, 9-first water outlet pipe, 101-first motor, 102-wind-up roller, 103-second motor, 104-rope wheel, 105-rope, 106-fixed block, 201-isolation strip, 202-brush hair, 301-second water inlet pipe, 302-first spray head, 303-third water inlet pipe, 304-second spray head, 401-annular rubber sheet, 501-second water outlet pipe, 502-second filter cap, 503-bracket, 504-cylinder, 505-baffle, 506-waste water tank, 507-third water outlet pipe.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
Example 1
1-5, the cultivation wastewater treatment equipment comprises a slow filter tank 1, a wastewater pipe 3, a bearing plate 5, a first water inlet pipe 8 and a first water outlet pipe 9; the right side of the slow filter tank 1 is provided with a waste water pipe 3, and the water outlet end of the waste water pipe 3 penetrates through the slow filter tank 1 and is discharged into the slow filter tank 1 to be used for cultivating wastewater; a bearing plate 5 is arranged in the slow filter tank 1; the lower part of the left side of the slow filter tank 1 is provided with a first water inlet pipe 8; a first water outlet pipe 9 is arranged at the lower part of the left side of the slow filter tank 1;
the filter comprises a filter material 4, a first filter cap 6, a filter cloth 7 and a retraction assembly; a filter material 4 composed of quartz sand is paved on the bearing plate 5; a plurality of first filter caps 6 are arranged on the bearing plate 5; the upper surface of the filter material 4 is provided with filter cloth 7; a retraction assembly is arranged in the slow filter tank 1.
The filter also comprises a water baffle 2, and two water baffles 2 which are symmetrical in front and back are arranged on the slow filter 1; the two water baffles 2 are inclined upwards by forty-five degrees with the inner wall of the slow filter 1, and the water outlet of the waste water pipe 3 is positioned in the included angle of the water baffles 2; the water baffle 2 is used for buffering the culture wastewater flowing in from the wastewater pipe 3, so that the condition that the culture wastewater impacts the same position of the filter material 4 for a long time to damage the structure of the filter material 4 and influence the filtering effect is avoided.
The following describes the process of filtering the cultivation wastewater in the slow filter 1 in detail: firstly, the cultivation wastewater is discharged into a slow filter tank 1 from a wastewater pipe 3, the cultivation wastewater is buffered through a water baffle 2, the cultivation wastewater uniformly and slowly falls on a filter cloth 7, the cultivation wastewater is subjected to biochemical treatment by utilizing a biological film which is cultivated and attached on the filter cloth 7, then the cultivation wastewater passes through a filter material 4 which consists of quartz sand, suspended matters and jelly in the cultivation wastewater are trapped by the filter material 4, the filtered cultivation wastewater enters the bottom of the slow filter tank 1 through a first filter cap 6, and finally the filtered cultivation wastewater is discharged through a first water outlet pipe 9.
The winding and unwinding assembly comprises a first motor 101, a winding roller 102, a second motor 103, a rope pulley 104, a rope 105 and a fixed block 106; a first motor 101 is arranged at the front side of the slow filter tank 1; a winding roller 102 is fixedly connected to the conveying end of the first motor 101; the left side of the slow filter tank 1 is provided with two second motors 103 which are symmetrical in front-back direction; two second motors 103 are respectively provided with a rope wheel 104; the head ends of ropes 105 are connected to the two rope pulleys 104; the tail ends of the two ropes 105 are connected with a fixed block 106; the upper surface of the left side of the filter cloth 7 is provided with a fixed block 106; the upper surface of the right side of the filter cloth 7 is fixedly connected with the winding roller 102; during back flushing, the first motor 101 drives the wind-up roller 102, the wind-up roller 102 winds up the filter cloth 7, so that the biological film on the filter cloth 7 is wound up together, and damage to the biological film during back flushing is avoided, and the biochemical treatment effect is influenced; after back flushing, two rope pulleys 104 are driven by two second motors 103 at the same time, and the two rope pulleys 104 drive two ropes 105 to lay the filter cloth 7, and the filter cloth 7 is laid on the upper surface of the filter material 4 again, so that biochemical treatment is carried out on the cultivation wastewater during filtration.
Also included are spacer 201 and bristles 202; a plurality of isolation strips 201 are arranged on the filter cloth 7; bristles 202 are arranged on the left sides of the isolation strips 201; the brush hair 202 increases the adhesion area of the biological film, and when the filter cloth 7 is wound, the biological film is prevented from falling off and being damaged from the filter cloth 7, and the biochemical treatment effect is prevented from being influenced.
The following describes the process of biofilm retraction in detail: before back flushing of the filter material 4 is started, the winding roller 102 is driven by the first motor 101 to wind the filter cloth 7, so that the biological film on the filter cloth 7 is wound on the winding roller 102, the isolating strips 201 on the filter cloth 7 isolate the biological film on the wound filter cloth 7, the biological film is prevented from being directly contacted and extruded with the filter cloth 7 to cause damage to the biological film, meanwhile, the bristles 202 on the isolating strips 201 enlarge the attachment area of the biological film, and the biological film is prevented from falling off and being damaged from the filter cloth 7 during winding, so that poor biochemical treatment effect in subsequent cultivation wastewater treatment is avoided; after back flushing of the filter material 4 is finished, two rope pulleys 104 are driven by two second motors 103, and the two rope pulleys 104 drive ropes 105 to lay the filter cloth 7 on the surface of the filter material 4 again, so that the biological films attached to the filter cloth 7 are laid together, and the biological films play a biochemical treatment role in filtering the subsequent cultivation wastewater.
Example 2
On the basis of example 1, as shown in figure 6,
the cleaning system comprises a second water inlet pipe 301 and a first spray head 302; a second water inlet pipe 301 is arranged on the right side of the slow filter tank 1; a plurality of first spray heads 302 with water outlets inclined downwards at forty-five degrees are arranged on the second water inlet pipe 301, and the first spray heads 302 are positioned right above the wind-up roll 102; when the filter cloth 7 is wound, the second water inlet pipe 301 supplies water to the first spray heads 302, the first spray heads 302 wash the biomembrane attached to the upper surface of the filter cloth 7, the aged biomembrane is washed down, and the aged biomembrane is prevented from being accumulated on the filter cloth 7, so that the subsequent filtering effect is prevented from being influenced.
The first spray head 302 is obliquely arranged on the second water inlet pipe 301 downwards at forty-five degrees; when the filter cloth 7 is wound, the second water inlet pipe 301 supplies water to the first spray head 302, a certain flow speed is kept when water flows through the first spray head 302, the flow speed of the water is moderate, the water flows can not damage and fall off the biological film which keeps active when the water flows down the aged biological film, the aged biological film is easy to fall off after losing activity, and the biological film which keeps active has a certain adhesiveness.
The cleaning system further comprises a third water inlet pipe 303 and a second nozzle 304; a third water inlet pipe 303 is arranged on the right side of the slow filter tank 1, the third water inlet pipe 303 is positioned right below the second water inlet pipe 301, and the third water inlet pipe 303 is higher than the winding roller 102; eight second spray heads 304 are arranged on the third water inlet pipe 303; the water outlet of the second spray head 304 is positioned between the upper quarter point and the right quarter point of the wind-up roll 102, and the included angle between the water outlet and the wind-up roll 102 is between thirty and forty-five degrees; when the filter cloth 7 is wound, the third water inlet pipe 303 supplies water to the second spray nozzle 304, clear water is used for cleaning quartz sand attached to the back surface of the filter cloth 7 in a dripping mode, the quartz sand is prevented from being wound into the wound filter cloth 7, the biomembrane is extruded, the biomembrane structure is damaged, and the subsequent filtering effect is affected.
The following describes the filter cloth 7 and the biofilm cleaning process in detail: when the filter cloth 7 is wound, water is supplied to a plurality of first spray heads 302 through the second water inlet pipe 301, the biological film attached to the filter cloth 7 is cleaned by water flow, the flow speed of the water flow is kept moderate, the aged biological film is easy to fall off after losing activity, and the biological film with activity is kept to have stronger adhesiveness, so that the water flow can not damage and fall off the biological film with activity when washing and falling off the aged biological film, and the biological film always keeps higher activity during subsequent filtration; meanwhile, the third water inlet pipe 303 supplies water to the second spray head 304, clear water is in a dripping mode to clean quartz sand attached to the back surface of the filter cloth 7 during winding, the quartz sand is prevented from being wound into the wound filter cloth 7, the biomembrane is extruded, and the biomembrane structure is damaged, so that the subsequent filtering effect is affected.
Example 3
Based on embodiment 1 or 2, as shown in fig. 7, the device further comprises an annular rubber sheet 401 which is of a single-side fixing structure, namely, an upper edge or a lower edge is fixed, and a non-fixed edge can be opened;
in the specific embodiment, a plurality of first filter caps 6 are provided with an annular rubber sheet 401; the upper side of the annular rubber sheet 401 is fixed at the upper part of the middle part of the first filter cap 6, and the lower side of the annular rubber sheet 401 covers the bottom of the filter hole of the first filter cap 6; when the cultivation wastewater is filtered, the cultivation wastewater is filtered through the filter material 4, suspended matters and jelly in the cultivation wastewater are retained by the filter material 4, part of sludge flows to the supporting plate 5, the annular rubber sheet 401 retains the sludge flowing to the supporting plate 5, a certain retention height space is reserved on the supporting plate 5 for the sludge, a large amount of sludge is prevented from penetrating to the bottom of the slow filter 1 through the first filter cap 6, the filtered water quality of the cultivation wastewater is influenced, when backflushing is carried out, the annular rubber sheet 401 is covered to the position of the bottom of the filter hole of the first filter cap 6 due to backflushing water pressure, the water flow direction of part of backflushing water is changed to the supporting plate 5, and then the backflushing clear water washes and cleans the sludge accumulated on the lower edge of the cap head of the first filter cap 6, so that the sludge is prevented from continuously accumulating outside the lower end of the annular rubber sheet 401, the retained sludge on the surface of the supporting plate 5 is cleaned, the residue of the sludge on the supporting plate 5 is reduced, and the filtering effect of the subsequent cultivation wastewater is influenced.
Example 4
On the basis of embodiment 1 or 2, as shown in fig. 7, what is different from embodiment 3 is that:
the lower side of the annular rubber sheet 401 is attached to the bottom of the filtering hole of the first filtering cap 6, and the upper side of the annular rubber sheet 401 is in an openable state; when the filter material 4 is backwashed, backwashed clean water enters from the first water inlet pipe 8, the filter material 4 is evenly washed through the first filter cap 6, the upper side of the annular rubber sheet 401 is flushed away by the backwashed clean water, biological membranes on the filter cloth 7 carry out biochemical treatment on the culture wastewater, the filtered culture wastewater is filtered through the filter material 4, suspended matters and jelly in the culture wastewater are trapped by the filter material 4, part of sludge flows to the upper surface of the supporting plate 5, the sludge flowing to the supporting plate 5 is trapped by the annular rubber sheet 401 on the first filter cap 6, a large amount of sludge is prevented from penetrating to the bottom of the slow filter 1 through the first filter cap 6, the water quality after the culture wastewater is influenced, when the backwashed operation is carried out, the upper side of the annular rubber sheet 401 is opened through backwashed water pressure, the first filter cap 6 can not produce interception on backwashed water at the moment, the backwashed efficiency on the non-bottom filter material 4 is higher, and meanwhile, the first filter cap 6 can not be blocked by residual sludge.
Example 5
On the basis of example 1, example 2 and example 4, as shown in figures 1, 2 and 8,
the waste water treatment system comprises a second water outlet pipe 501, a second filter cap 502, a bracket 503, a baffle 505, a waste water tank 506 and a third water outlet pipe 507; the left side of the slow filter tank 1 is provided with a wastewater tank 506, the wastewater tank 506 is higher than the filter material 4, and the filter material 4 is prevented from being discharged into the wastewater tank 506 along with backwash wastewater during backwash; the bottom of the wastewater tank 506 is connected with a third water outlet pipe 507; the left side of the upper part of the slow filter tank 1 is provided with a second water outlet pipe 501 which is electrically connected, the second water outlet pipe 501 is communicated with a third water outlet pipe 507, and the height of the second water outlet pipe 501 is positioned at the bottom of the filter material 4; a second filter cap 502 is arranged on the second water outlet pipe 501; the upper left side of the slow filter 1 is provided with a bracket 503; the bracket 503 is provided with a cylinder 504; a baffle 505 is fixedly connected to the output end of the cylinder 504; when the filter material 4 is backwashed, a backwashed waste water outlet is opened by driving a baffle 505 through an air cylinder 504, backwashed waste water flows into a waste water tank 506, and backwashed waste water is discharged through a third water outlet pipe 507; simultaneously, the backwash wastewater mixed with the sludge in the filter material 4 is discharged to the third water outlet pipe 507 through the second water outlet pipe 501, so that the sludge in the aquaculture wastewater is prevented from accumulating on the upper surface of the supporting plate 5, and the filtration rate of the aquaculture wastewater is prevented from being influenced.
The following describes the process of discharging backwash wastewater in detail: when the filter material 4 is backwashed, backwashed clean water enters the bottom of the slow filter tank 1 through the first water inlet pipe 8, then the backwashed clean water uniformly washes the filter material 4 through the first filter cap 6, so that the filter material 4 is fluidized, suspended matters and jelly trapped in the filter material 4 are peeled off from the surface of the filter material 4 under the double effects of the backwashed water flow shearing force and collision friction among particles of the filter material 4, meanwhile, the air cylinder 504 drives the baffle 505 to move upwards to open a backwashed waste water outlet, backwashed waste water flows into the waste water tank 506 through the backwashed waste water outlet, and backwashed waste water is discharged through the third water outlet pipe 507; simultaneously, backwash wastewater mixed with sludge in the filter material 4 is discharged to a third water outlet pipe 507 through a second water outlet pipe 501, so that the long-term accumulation of sludge in the culture wastewater on the upper surface of the supporting plate 5 is avoided, and the subsequent filtration rate of the culture wastewater is influenced; the second water outlet pipe 501 is electrically closed in the non-backwashing state; in the back flushing process, the second filter cap 502 intercepts the filter material 4, so that the filter material 4 is prevented from being discharged through the second water outlet pipe 501, and the water quality of the filtered culture wastewater is prevented from being influenced in the subsequent filtering process.
The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. All equivalents and alternatives falling within the spirit of the invention are intended to be included within the scope of the invention. What is not elaborated on the invention belongs to the prior art which is known to the person skilled in the art.
Claims (3)
1. The cultivation wastewater treatment equipment comprises a slow filter tank (1), a wastewater pipe (3), a bearing plate (5), a first water inlet pipe (8) and a first water outlet pipe (9); a waste pipe (3) for feeding the cultivation wastewater is arranged on the slow filter tank (1); a bearing plate (5) is arranged in the slow filter tank (1); a first water inlet pipe (8) for back flushing water inflow is arranged at the lower part of the left side of the slow filter tank (1); a first water outlet pipe (9) for discharging filtered cultivation wastewater is arranged at the lower part of the left side of the slow filter tank (1); the method is characterized in that: the filter comprises a filter material (4), a first filter cap (6), filter cloth (7) and a retraction assembly; a filter material (4) for physically filtering the cultivation wastewater is paved on the bearing plate (5); a plurality of first filter caps (6) which can block the filter material (4) from flowing out are arranged on the bearing plate (5); the upper surface of the filter material (4) is provided with a filter cloth (7) which can cultivate and bear biological membranes; a winding and unwinding component for winding the filter cloth (7) is arranged in the slow filter tank (1);
the device also comprises an annular rubber sheet (401) which is of a unilateral fixed structure, namely an upper edge or a lower edge is fixed, and a non-fixed edge can be opened; the plurality of first filter caps (6) are respectively provided with an annular rubber sheet (401) which can intercept sludge;
the toothbrush further comprises a spacer (201) and bristles (202); a plurality of isolating strips (201) which can isolate the biological film are arranged on the filter cloth (7); bristles (202) are arranged on the left sides of the isolation strips (201);
the filter also comprises a water baffle (2), and the slow filter (1) is provided with the water baffle (2); the two water baffles (2) are inclined upwards by forty-five degrees with the inner wall of the slow filter tank (1), and the water outlet of the waste water pipe (3) is positioned in the included angle of the water baffles (2);
the winding and unwinding assembly comprises a first motor (101), a winding roller (102), a second motor (103), a rope wheel (104), a rope (105) and a fixed block (106); a first motor (101) is arranged on the slow filter tank (1); a winding roller (102) for winding the filter cloth (7) is fixedly connected to the conveying end of the first motor (101); the left side of the slow filter tank (1) is provided with two second motors (103) which are symmetrical in front-back direction; two second motors (103) are respectively provided with a rope wheel (104); the two rope wheels (104) are connected with the head ends of ropes (105); the tail ends of the two ropes (105) are connected with a fixed block (106); the upper surface of the left side of the filter cloth (7) is provided with a fixed block (106); the upper surface of the right side of the filter cloth (7) is fixedly connected with a winding roller (102);
the cleaning system comprises a second water inlet pipe (301) and a first spray head (302); a second water inlet pipe (301) is arranged on the right side of the slow filter tank (1); a plurality of first spray heads (302) with water outlets inclined downwards at forty-five degrees are arranged on the second water inlet pipe (301), and the first spray heads (302) are positioned right above the winding roller (102);
the first spray head (302) is obliquely downwards arranged on the second water inlet pipe (301) at forty-five degrees;
the cleaning system also comprises a third water inlet pipe (303) and a second spray head (304); a third water inlet pipe (303) is arranged on the right side of the slow filter tank (1), the third water inlet pipe (303) is positioned right below the second water inlet pipe (301), and the third water inlet pipe (303) is higher than the winding roller (102); a plurality of second spray heads (304) capable of dripping water are arranged on the third water inlet pipe (303); the water outlet of the second spray head (304) is positioned between the upper quarter point and the right quarter point of the wind-up roll (102), and the included angle between the water outlet and the wind-up roll (102) is between thirty and forty-five degrees;
the device also comprises a waste water discharge system, wherein the waste water discharge system comprises a second water outlet pipe (501), a second filter cap (502), a bracket (503), an air cylinder (504), a baffle plate (505), a waste water tank (506) and a third water outlet pipe (507); a wastewater tank (506) capable of discharging backwash wastewater is arranged on the left side of the slow filter tank (1), the wastewater tank (506) is higher than the filter material (4), and the filter material (4) is prevented from being discharged into the wastewater tank (506) along with backwash wastewater during backwash; the bottom of the wastewater tank (506) is connected with a third water outlet pipe (507) capable of discharging backwash wastewater; the left side of the upper part of the slow filter tank (1) is provided with a second water outlet pipe (501) which is electrically connected, the second water outlet pipe (501) is communicated with a third water outlet pipe (507), and the height of the second water outlet pipe (501) is positioned at the bottom of the filter material (4); a second filter cap (502) capable of intercepting the filter material (4) is arranged on the second water outlet pipe (501); the upper part of the upper left side of the slow filter tank (1) is provided with a bracket (503); an air cylinder (504) capable of driving the baffle (505) to move up and down is arranged on the bracket (503); the output end of the air cylinder (504) is fixedly connected with a baffle plate (505) which can intercept wastewater.
2. A farming wastewater treatment plant according to claim 1, wherein: the upper side of the annular rubber sheet (401) is fixed at the upper part of the middle part of the first filter cap (6), and the lower side of the annular rubber sheet (401) covers the bottom of the filter hole of the first filter cap (6).
3. A farming wastewater treatment plant according to claim 1, wherein: the lower side of the annular rubber sheet (401) is attached to the bottom of the filtering hole of the first filtering cap (6), and the upper side of the annular rubber sheet (401) is in an openable state.
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