CN109464847B - Automatic back flush sewage treatment plant of autogiration formula machinery - Google Patents
Automatic back flush sewage treatment plant of autogiration formula machinery Download PDFInfo
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- CN109464847B CN109464847B CN201910023467.0A CN201910023467A CN109464847B CN 109464847 B CN109464847 B CN 109464847B CN 201910023467 A CN201910023467 A CN 201910023467A CN 109464847 B CN109464847 B CN 109464847B
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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
- B01D36/04—Combinations of filters with settling tanks
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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
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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
- 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
- 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
Abstract
The application belongs to the technical field of sewage treatment, and particularly relates to a self-rotating mechanical automatic backwashing sewage treatment device. The device is of a box body structure and is divided into three parts, namely a water filtering part, a water purifying part and a back flushing control part; wherein a punching plate is arranged between the water purifying part and the water filtering part, the upper part of the punching plate is a water purifying part, and the lower part of the punching plate is a water filtering part; the back flushing control part is arranged outside the box body; meanwhile, an overflow port is arranged at the top of the box body, and a water inlet is arranged at the lower part of the box body. The self-rotating mechanical automatic back flushing sewage treatment device provided by the application has ingenious structural design, and besides the power pumping of the influent sewage, the whole back flushing process can realize mechanical automatic back flushing without more manpower intervention, so that the operation cost is lower. The preliminary application effect also shows that the filter screen mesh number is higher, so that a better filter effect can be realized, and the subsequent sewage treatment cost is greatly reduced.
Description
Technical Field
The application belongs to the technical field of sewage treatment, and particularly relates to a self-rotating mechanical automatic backwashing sewage treatment device.
Background
With the improvement of urban level and the rapid expansion of population scale, the urban sewage treatment requirements are also higher and higher, wherein one of the important indexes of urban sewage treatment is whether the COD value reaches the standard. In the prior art, the main process flow of sewage treatment is as follows: firstly, solid-liquid separation (sedimentation tank) is carried out on sewage, and then, COD value is reduced through certain biochemical treatment (aeration treatment for aerobic fermentation) so as to realize standard discharge. One of the main disadvantages of this approach is that the sewage treatment plant needs to occupy a large area of land, and the sewage treatment speed is slow, which makes it difficult to meet the actual sewage treatment requirements.
In combination with the existing sewage treatment process, a series of new sewage treatment devices and processes are developed and designed in the prior art to meet the technical requirements of low energy consumption, low cost, low occupation of land and the like, for example: a three-ditch oxidation ditch method, an SBR method, a UNITANK technology, a Biological Aerated Filter (BAF), a Membrane Bioreactor (MBR) and a series of novel high-efficiency sewage treatment technologies. However, in general, the existing treatment processes or devices still have certain disadvantages of low treatment speed, high treatment cost and the like, and due to the huge sewage throughput, further development and design of the sewage treatment device are still necessary to better meet the actual sewage treatment needs.
Disclosure of Invention
The application aims to provide a self-rotating mechanical automatic backwashing sewage treatment device, thereby laying a foundation for the rapid treatment of sewage.
The technical scheme adopted by the application is detailed as follows.
The self-rotating mechanical automatic back flushing sewage treatment device is integrally in a box structure, and the box is divided into three parts, namely a water filtering part, a water purifying part and a back flushing control part according to different functions;
wherein, a punching plate is arranged between the water purifying part and the water filtering part and is divided into a water purifying part and a filtering treatment part by the punching plate, the upper part of the punching plate is a water purifying part, and the lower part is a water filtering part; the back flushing control part is arranged outside the box body; meanwhile, an overflow port (a final water outlet for purifying water) is arranged at the top of the box body, and a water inlet (a sewage water inlet) is arranged at the lower part of the box body;
the punching plate is provided with a plurality of water permeable holes, and the material of the punching plate is high in hardness, for example, a stainless steel plate is adopted; the pore diameter of the water permeable pores is not excessively large, specifically, for example: 2-3 mm;
specifically, each structural part:
the water filtering part is positioned at the lower part of the box body and is a space formed by the punching plate and the bottom of the box body; a plurality of parallel self-rotating water tanks are arranged in the water filtering part (the number of the self-rotating water tanks is adjusted according to the sewage treatment scale); meanwhile, a water outlet is arranged on the bottom plate of the box body of the water filtering part, and a turnover plate seal for sealing is matched at the water outlet;
the self-rotating water tank is wrapped with a reverse osmosis filter screen; the self-rotating water tank is integrally arranged on the supporting plate and comprises a rotatable vertical shaft on the supporting plate and a self-rotating tank body fixedly arranged on the vertical shaft (the tank body can rotate on the bracket through the vertical shaft), the top of the tank body is a round self-flushing water inlet, the tank body is integrally in a cuboid structure, flushing slits which are arranged in a crossed and symmetrical mode are formed in the vertical edges of the cuboid, and when certain water flow and water pressure exist in the tank body, the tank body is driven to generate self-rotating motion through the vertical shaft by utilizing the water flow pressure difference of the outwards sprayed water flushing slits;
the turning plate seal comprises a plurality of turning plates which are symmetrically arranged (preferably two) and can rotate along the fixed shaft, and a transverse plate with a symmetry center capable of moving up and down, wherein under normal conditions, the turning plates are limited by gravity, the turning plates are horizontally buckled on the transverse plate to realize a sealing effect, and after the transverse plate moves upwards, the transverse plate can drive the turning plates to rotate along the fixed shaft by a certain angle, so that the sealing effect is lost;
in the concrete design, in order to realize the up-and-down displacement movement of the transverse plate, the middle part of the transverse plate is provided with a limiting rod which moves up and down, a limiting cylinder is sleeved outside the limiting rod, and the limiting rod moves up and down in the limiting cylinder, so that the up-and-down displacement movement of the transverse plate is driven;
in the preferred design, one or a plurality of one-way valves for outward flowing water are arranged on a supporting plate at the lower part of the self-rotating water tank (namely, the treated sewage can only return to the water filtering part through the one-way valve, and the sewage to be treated of the water filtering part can not enter through the one-way valve);
in the concrete design, when the specification of the self-rotating water tank is designed, taking a cuboid water tank with the height of 1 meter as an example, on four vertical edges, when a total opening slit (flushing slit) is 60cm long and a slit (flushing slit) is about 3mm wide, the water tank can generate a relatively rapid self-rotating effect, and meanwhile, a filter screen is backwashed thoroughly by utilizing water flow sprayed by the flushing slit;
the reverse osmosis filter screen is specifically a 100-300 mesh filter screen, and the filter screen is made of a material which has corrosion resistance and good strength, for example, a stainless steel material;
in a further preferred design, a plurality of unidirectional air inlet valves which are ventilated inwards can be arranged on the side wall of the box body below the punching plate and on the side wall of the box body corresponding to the reverse osmosis net so as to adjust the air inlet speed in the back flushing process;
the water purifying part is positioned at the upper part of the box body and is a space formed by the upper part of the punching plate and the upper part of the top plate of the box body; a water outlet is arranged on the top plate of the water purifying part box body, and a lever seal is arranged at the water outlet; meanwhile, a pressure relief port is arranged on the top plate of the box body, and in the preferred design, the height of the pressure relief port is higher than that of the water outlet;
the lever seal has the specific structure that: a lever fixing shaft is arranged on the top plate of the box body, one end of the lever is provided with a sealing valve for sealing the water outlet, and the other end of the lever is provided with a water tank with a built-in balancing weight;
in the preferred design, the lever fixing shaft is arranged on a baffle plate which divides the water purifying part into a water outlet part and a back flushing delay control part (the pressure relief port is positioned on the back flushing delay control part); the water outlet part is mainly used for discharging the filtered clean water, the clean water of the back flushing delay control part is mainly discharged through the pressure relief port, and the adjustment of the atmospheric pressure difference during the subsequent back flushing is realized by adjusting the height of the pressure relief port, so that the delay back flushing function (delay function, mainly in that the sewage in the tank body is discharged currently, and the back flushing of the clean water after the subsequent filtering is convenient) is realized;
it should be noted that the height of the overflow port for discharging the purified water is higher than the vertical height of the lever seal;
in the preferred design, one or a plurality of symmetrically arranged water storage areas are arranged in the upper part of the punching plate of the water purifying part or along the punching plate;
the back flushing control part comprises a water feeding pipe which is arranged on the outer wall of the box body and is communicated with the water filtering part, a liquid level groove which is formed by extending the water feeding pipe, and an upward floating seal which is arranged in a cavity body formed by the liquid level groove and the outer wall of the box body, and a bottom plate in the cavity body is provided with a sewage discharging port which discharges sewage downwards in a unidirectional way;
the floating seal comprises the following specific structures: one end of the connecting rod is fixed on the transverse shaft at the upper part of the cavity and penetrates through the water feeding pipe to the bottom of the box body, the sealing ball is arranged at the bottom of the connecting rod, and the floating device is fixed on the connecting rod arranged in the cavity and drives the sealing ball to move upwards through the connecting rod under the action of buoyancy, so that a drainage port sealed by the sealing ball is opened (in the process, an inverted U-shaped groove is formed outside the sealing ball, the sealing ball moves upwards in the inverted U-shaped groove, at the moment, the drainage port is opened firstly, and the flow of discharged sewage is relatively smaller, but the drainage port with larger caliber can be opened easily along with the pressure change and the continuous upward displacement of the sealing ball; in the continuous upward displacement movement process of the sealing ball, the transverse plate in the turnover plate seal is further driven to move upward by mechanical thrust, so that the turnover plate is opened, and a large amount of sewage is discharged rapidly;
the turning plate seal of the water filtering part and the floating seal of the back flushing control part form a composite seal for opening and closing the water outlet;
when the device is used, the sewage water inlet is matched with a power mechanical device (such as a water pump) to continuously introduce sewage into the device and ensure a certain water pressure so as to better ensure the sewage treatment effect.
The specific sewage treatment process by using the device comprises the following steps:
under the action of gravity, the composite seal seals the water outlet when not in use. In the sewage treatment process, sewage to be treated enters the water filtering part from the water inlet at the bottom of the tank body, one part of sewage passes through the self-rotating water tank after passing through the reverse osmosis net, then enters the water purifying part through the punching plate, the other part of sewage moves upwards along the water feeding pipe of the back flushing part, and the liquid level is kept consistent with the liquid level in the tank body. In the water purifying part, the sewage after filtration is increased and the pressure effect is increased, the purified water after treatment enters the top of the box body through the water outlet, and further enters the water tank at one end of the lever seal along with the increase of water flow, the water outlet is completely opened by matching with the effect of the balancing weight, and the purified water after treatment is finally discharged out of the box body from the overflow port.
It should be explained and explained that, in order to ensure the filtering and purifying effect of the sewage, the mesh number of the reverse osmosis filter screen is required to be certain, so that the mesh number of the reverse osmosis filter screen is selected to be 100-300 mesh, although the mesh number can better ensure the filtering effect, the sewage filtering speed can be gradually slowed down along with the accumulation of impurities on the reverse osmosis filter screen, but the water flow can not be completely prevented from passing through the filter screen under the continuous sewage water inlet pressure, and a filtering effect similar to reverse osmosis is formed at the moment, so that the purifying effect can still be ensured.
Along with the increase of the accumulation of impurities in the anti-infiltration net, the filtered water flow through the anti-infiltration net can be gradually reduced, and the pressure of the sewage entering the sewage treatment part can not be changed, and due to the existence of the hydraulic pressure difference, the sewage enters a cavity formed by the liquid level groove and the side wall of the box body along the water feeding pipe of the back flushing control part and through the overflow port of the liquid level groove, and further drives the floating seal to float upwards, so that the water discharge port is triggered and opened, and the sewage to be treated (i.e. untreated sewage) of the water filtering part is discharged through the water discharge port rapidly (the discharge speed is important, and the sewage is discharged within 10 seconds to tens of seconds generally). And along with the quick discharge of water flow of the water filtering part, the water flow of the water purifying part also quickly returns to the sewage treatment part again and is discharged, and after the liquid level of the water purifying part is lower than the water outlet, the water purifying lever seals the water purifying part quickly, meanwhile, as a cavity formed by the water filtering part can instantly enter a large amount of air, the water purifying part above the punching plate can keep the water purifying above the punching plate (in the cavity of the water purifying part) under the action of atmospheric pressure, and the water can not immediately flow downwards to return to the sewage treatment part again.
However, as the water permeable holes on the punching plate are not in an absolute sealing state and are under the action of gravity, the water purified after being partially treated by the water purifying part continuously (at a lower speed) drops downwards into the automatic rotary water tank and returns to the water filtering part again; along with the continuous reduction of water flow of the water purifying part, when the water flow liquid level of the water purifying part is lower than the pressure relief port at the top of the tank body, the water flow of the water purifying part can instantaneously and largely enter the self-rotating water tank due to the change of atmospheric pressure difference, at the moment, the high-impact water pressure and the self-rotating water tank edge flushing seam are utilized to drive the self-rotating water tank to rapidly rotate, meanwhile, the high-speed water flow of the water tank edge flushing seam is utilized to rapidly back flush the anti-infiltration net, and sewage after back flushing is finally discharged through the water outlet.
After the back flushing is finished, the floating seal disappears along with the buoyancy, and the water outlet is resealed under the action of gravity, so that a new sewage treatment cycle is started.
In general, the self-rotating mechanical automatic back flushing sewage treatment device provided by the application has ingenious structural design, and besides the power pumping of the influent sewage, the whole back flushing process can realize mechanical automatic back flushing without more manpower intervention, so that the operation cost is lower. The preliminary application effect also shows that the filter screen mesh number is higher, so that a better filtering effect can be realized, the subsequent sewage treatment cost is greatly reduced, and when the device is used for treating general domestic sewage, COD in the water body can be better reduced only after the device is used for treating the sewage, and the on-site treatment and on-site utilization of the sewage can be realized, so that the device has better practical value and better application prospect.
Drawings
FIG. 1 is a schematic diagram of a self-rotating mechanical automatic backwash sewage treatment device provided by the application;
in the figure: 1. overflow port, 2, water lever seal, 3 delivery port, 4, pressure relief port, 5, floating seal, 6, overflow port, 7, flushing level groove, 8, dirt discharge port, 9, water supply pipe, 10, turning plate seal, 11, diaphragm, 12, sealing ball, 13, dirt discharge port, 14, water discharge port, 15, reverse osmosis filter screen, 16, one-way water discharge port, 17, rotary vertical shaft, 18, self-rotary water tank, 19, air inlet valve, 20, water inlet, 21, water storage area, 22 and punching plate.
Detailed Description
The present application is further explained below with reference to examples so that those skilled in the art can more clearly understand the technical scheme of the present application.
Examples
As shown in FIG. 1, the self-rotating mechanical automatic backwash sewage treatment device provided by the application has a box structure as a whole, and the box is divided into three parts, namely a water filtering part, a water purifying part and a backwash control part according to different functions;
wherein, a punching plate 22 is arranged between the water purifying part and the water filtering part, the punching plate 22 is divided into a water purifying part and a filtering treatment part, the upper part of the punching plate is a water purifying part, and the lower part is a water filtering part; the back flushing control part is arranged outside the box body; meanwhile, an overflow port 1 (a final water outlet of purified water) is arranged at the top of the box body, and a water inlet 20 (a sewage water inlet) is arranged at the lower part of the box body;
the perforated plate 22 is specifically made of, for example, stainless steel plates, so as to ensure a larger bearing capacity for the water body in the back flushing process; meanwhile, the aperture of the water permeable hole is not too large, so that the backwash water supported by atmospheric pressure is guaranteed to have certain tightness, and the water permeable hole is specifically: 2-3 mm.
The water filtering part is positioned at the lower part of the box body and is a space formed by the punching plate 22 and the bottom of the box body; a plurality of parallel self-rotating water tanks 18 are arranged in the water filtering part (the number of the self-rotating water tanks is adjusted according to the sewage treatment scale); meanwhile, a water outlet 114 is arranged on the bottom plate of the box body of the water filtering part, and a turnover plate seal 10 for sealing is matched at the water outlet;
the self-rotating water tank 18 is externally wrapped with an anti-infiltration net 15; the self-rotating water tank is integrally arranged on a supporting plate (not shown), and comprises a rotatable vertical shaft 17 on the supporting plate and a self-rotating tank body fixedly arranged on the vertical shaft (the tank body can rotate on a bracket through the vertical shaft), the top of the tank body is a circular self-flushing water inlet (the diameter of the circular water inlet should be as large as possible in order to ensure the water inflow in the back flushing process), the tank body is integrally of a cuboid structure, flushing slits (not shown in the figure) which are arranged in a crossed symmetry manner are formed in the vertical edges of the cuboid, and when certain water flow and water pressure exist in the tank body, the tank body is driven to generate self-rotating motion through the vertical shaft by utilizing the water flow pressure difference of the outward injection of the flushing slits.
The flap seal 10 comprises a plurality of (preferably two) flaps which are symmetrically arranged and can rotate along a fixed shaft, and a transverse plate 11 with a symmetry center capable of moving up and down, wherein the transverse plate 11 is limited by gravity under normal conditions, the flaps are horizontally buckled on the transverse plate 11 to realize a sealing effect, and after the transverse plate 11 moves upwards, the transverse plate 11 can drive the flaps to rotate along the fixed shaft by a certain angle, so that the sealing effect is lost.
In a specific design, in order to realize the up-and-down displacement movement of the transverse plate 11, a limiting rod which moves up and down is arranged in the middle of the transverse plate 11, a limiting cylinder is sleeved outside the limiting rod, and the limiting rod moves up and down in the limiting cylinder, so that the up-and-down displacement movement of the transverse plate 11 is driven.
In a preferred design, the support plate at the lower part of the self-rotating water tank is provided with one or more one-way valves 16 for outward water flow (i.e. treated sewage can only return to the water filtering part through the one-way valves, and sewage to be treated in the water filtering part cannot enter through the one-way valves).
In the concrete design, when the specification of the self-rotating water tank is designed, taking a cuboid water tank with the height of 1 meter as an example, on four vertical edges, when a total opening slit (flushing slit) is 60cm long and a slit (flushing slit) is about 3mm wide, the water tank can generate a relatively rapid self-rotating effect, and meanwhile, a filter screen is backwashed thoroughly by utilizing water flow sprayed by the flushing slit;
the anti-infiltration net 15 is specifically a 100-300 mesh filter screen (specifically, for example, 200 mesh filter screen), and the filter screen material should be made of a material with corrosion resistance and better strength, so as to ensure that no obvious deformation and longer service time occur in the back flushing process, and specifically, a 200 mesh stainless steel filter screen is used.
Because the air pressure needs to be utilized subsequently to be left and right, in a further preferred design, the tank side wall below the punching plate 22 and the tank side wall corresponding to the reverse osmosis net are provided with an inward-ventilation one-way air inlet valve 19 (after the subsequent sewage is emptied, air is one-way to enter the cavity of the water filtering part, and the sewage treatment process is not started) so as to adjust the air entering speed in the back flushing process.
The water purifying part is positioned at the upper part of the box body and is a space formed by the upper part of the punching plate 22 and the upper part of the top plate of the box body; a water outlet 3 is arranged on the top plate of the water purifying part box body, and a lever seal 2 is arranged at the water outlet 3;
the lever seal 2 has the specific structure that: a lever fixing shaft is arranged on the top plate of the box body, one end of the lever is provided with a sealing valve for sealing the water outlet, and the other end of the lever is provided with a water tank with a built-in balancing weight; meanwhile, a pressure relief port 4 is arranged on the top plate of the box body;
in the preferred design, the lever fixing shaft is arranged on a partition plate which divides the water purifying part into a water outlet part and a back flushing delay control part (the pressure relief port 4 is positioned in the back flushing delay control part); the water outlet part is mainly used for discharging filtered clean water, the clean water of the back flush delay control part is mainly discharged through the pressure relief port 4, and the adjustment of the atmospheric pressure difference during subsequent back flush is realized by adjusting the height of the pressure relief port 4, so that the delay back flush function (delay function, mainly in that the sewage in the tank body is discharged currently, and the back flush of the clean water after subsequent filtration is convenient) is realized; in practical design, the height of the pressure relief port 4 is higher than that of the water outlet 3 (mainly, the proper time for back flushing is reserved, the immediate back flushing is avoided, and the back flushing effect is ensured)
The height of the overflow port 1 for discharging the purified water is higher than the vertical height of the lever seal 2, so that the purified water discharge speed can be adjusted to ensure the filtering effect. The water purification part baffle is arranged, and the main reason is that the water flow of the water outlet part can be rapidly discharged in the initial stage of automatic back flushing, and then the water flow of the back flushing delay control part can not be immediately emptied by utilizing the lever seal 2 to rapidly seal the water outlet, so that a certain time is reserved for discharging sewage in the box body, and the delay adjusting effect is realized.
In the preferred design, one or a plurality of water storage 21 areas which are symmetrically arranged are arranged in the upper part of the punching plate 22 of the water purifying part or along the punching plate; the main reason of this design is that the filtration effect cannot be fully ensured at each filtration initial stage of the reverse osmosis filter screen (along with the extension of the operation time and the accumulation of impurities on the reverse osmosis filter screen, the effect similar to "filtration" can ensure a better filtration effect, so that in the earlier stage of filtration of the reverse osmosis filter screen, the filtration effect is relatively poor), a proper amount of impurities can enter the water purifying part, and because the water flow discharge speed of the water purifying part is relatively slow, the impurities in the water purifying part can be further precipitated and stored in the water storage area (in the back flushing process, the water in the water storage area does not participate in back flushing) so as to be uniformly treated when the equipment is maintained.
The back flushing control part comprises a water feeding pipe which is arranged on the outer wall of the box body and is communicated with the water filtering part, a liquid level groove which is formed by extending the water feeding pipe, and an upward floating seal which is arranged in a cavity body formed by the liquid level groove and the outer wall of the box body, and a bottom plate in the cavity body is provided with a sewage discharging port which discharges sewage downwards in a unidirectional way;
the floating seal comprises the following specific structures: one end of the connecting rod is fixed on the transverse shaft at the upper part of the cavity and penetrates through the water feeding pipe to the bottom of the box body, the sealing ball is arranged at the bottom of the connecting rod, and the floating device is fixed on the connecting rod arranged in the cavity, and under the action of buoyancy, the floating device drives the sealing ball to move upwards through the connecting rod, so that a drainage port sealed by the sealing ball is opened (in the process, an inverted U-shaped groove is formed outside the sealing ball, the sealing ball moves upwards in the inverted U-shaped groove, at the moment, the drainage port 13 is opened firstly, and the flow of discharged sewage is relatively smaller, but the drainage port 14 with a larger caliber can be opened easily along with the pressure change and the continuous upward displacement of the sealing ball; in the continuous upward displacement movement process of the sealing ball, the transverse plate 11 in the turnover plate seal 10 is further driven to move upward by mechanical thrust, so that the turnover plate is opened, and a large amount of sewage is discharged rapidly.
In practical application, the turning plate seal of the water filtering part and the floating seal of the back flushing control part form a composite seal for regulating and controlling the water discharge port.
It should be noted that in practical designs, the top overflow 6 of the tank 7 should be at a level well above the final clean water outlet overflow 1 to ensure proper backwash timing.
The specific sewage treatment and back flushing processes are explained in detail as follows:
when the device is used, the sewage water inlet is matched with a power mechanical device (such as a water pump) to continuously introduce sewage into the device, and a certain water pressure is ensured to ensure the sewage treatment effect. And in the unused state, the composite seal seals the water drain 14 under the action of gravity.
When sewage treatment starts, sewage to be treated enters the water filtering part from the water inlet 20 at the bottom of the tank body, most of sewage enters the water purifying part through the perforated plate 22 after passing through the self-rotating water tank 18 after passing through the reverse osmosis net 15, the other part moves upwards along the water feeding pipe 9 of the back flushing part, and the liquid level is kept consistent with the liquid level in the tank body (the liquid level in the liquid level tank is kept parallel with the liquid level in the tank body in the initial stage of sewage treatment). In the water purifying part, the treated purified water enters the top of the box body through the water outlet 3 along with the increase of the filtered sewage and the increase of the pressure, and further enters a water tank at one end of the lever seal along with the increase of the water flow, and the water outlet 3 is completely opened by matching with the action of the balancing weight, so that the treated purified water is finally discharged out of the box body from the overflow port.
In the application process of the application, in order to ensure the sewage filtering and purifying effect, the mesh number of the reverse osmosis filter screen is required to be 100-300 meshes, and although the mesh number can better ensure the filtering effect, the sewage filtering speed can be gradually slowed down along with the accumulation of impurities on the reverse osmosis filter screen, but the water flow can not be completely prevented from passing through the filter screen under the continuous sewage water inlet pressure, and a filtering effect similar to reverse osmosis is formed at the moment, so that the purifying effect can still be ensured.
With the increase of the impurity accumulation of the reverse osmosis filtration net, the filtration water flow through the reverse osmosis filtration net 15 is gradually reduced, the sewage pressure entering the sewage treatment part is not changed, and due to the existence of the hydraulic pressure difference, sewage enters a cavity formed by the liquid level groove and the side wall of the box body along the water feeding pipe 9 of the reverse osmosis control part and the overflow port 6 of the liquid level groove 7, and further the floating seal 5 is driven to float upwards, so that the water discharge port 14 is triggered to be opened (in the process, the water discharge port 13 with smaller caliber is firstly opened through the upward movement of the sealing ball, so that the original water discharge and the air pressure adjustment are realized, the water discharge port 14 with larger caliber can be opened easily in the continuous upward movement process of the sealing ball, meanwhile, the transverse plate 11 is driven to move upwards through the mechanical thrust of the reverse U-shaped groove in the upward movement process, and the turning plate is opened), and the sewage to be treated (i.e. the untreated sewage in the water filtering part is discharged fast through the water discharge port (the discharge speed is important, and is generally discharged within 10 seconds to tens of seconds). With the rapid discharge of the water flow of the water filtering part, the water flow of the water purifying part also rapidly returns to the sewage treatment part and is discharged, and after the liquid level of the water purifying part is lower than the water outlet, the lever seal rapidly seals the water purifying part, meanwhile, as the cavity formed by the water filtering part can instantly enter a large amount of air, the water purifying part above the punching plate 22 is kept above the punching plate (in the cavity of the water purifying part) under the action of the atmospheric pressure, and the water is not immediately returned to the sewage treatment part again (the process is similar to the experiment of lifting the water in the inverted water cup by the atmospheric pressure).
However, since the water permeable hole on the perforated plate 22 is not in an absolute sealing state, the water permeable hole is subject to the action of gravity, and the water purified by the water purifying part after being partially treated continuously (at a slower speed) drops downwards into the automatic rotary water tank 18 and returns to the water filtering part again; along with the continuous reduction of the water flow of the water purifying part, when the water flow level of the water purifying part is lower than the pressure relief port 4 at the top of the tank body, the water flow of the water purifying part can instantaneously and largely enter the self-rotating water tank 18 due to the change of atmospheric pressure difference, at the moment, the self-rotating water tank is driven to rotate rapidly by using larger impact water pressure and the flushing seam at the edge of the self-rotating water tank, meanwhile, the reverse osmosis net 15 is backwashed rapidly by using the high-speed water flow at the flushing seam at the edge of the water tank, and the backwashed sewage is finally discharged through the water discharge port 14.
After the back flushing is finished, the floating seal 5 is resealed to the water drain port 14 under the action of gravity along with the disappearance of buoyancy, so that a new sewage treatment cycle is started.
Preliminary experiments on the prepared sewage treatment device show that the automatic back flushing purpose can be better achieved when the domestic sewage treatment is carried out, and the COD of the domestic sewage can be primarily reduced (the reduction range can reach about 90 percent), so that the sewage treatment device has a better application prospect.
Claims (5)
1. The automatic backwash sewage treatment device is characterized in that the whole device is of a box structure and is divided into a water filtering part, a water purifying part and a backwash control part;
wherein a punching plate is arranged between the water purifying part and the water filtering part, the upper part of the punching plate is a water purifying part, and the lower part is a water filtering part; the back flushing control part is arranged outside the box body; meanwhile, an overflow port is arranged at the top of the box body, and a water inlet is arranged at the lower part of the box body;
the punching plate is provided with a plurality of water permeable holes; specifically, each structural part:
the water filtering part is positioned at the lower part of the box body and is a space formed by the punching plate and the bottom of the box body, and meanwhile, a plurality of one-way air inlet valves which are ventilated inwards are arranged on the side wall of the box body below the punching plate and the side wall of the box body corresponding to the reverse osmosis net; a plurality of parallel self-rotating water tanks are arranged in the water filtering part; meanwhile, a water outlet is arranged on the bottom plate of the box body of the water filtering part, and a turnover plate seal for sealing is matched at the water outlet;
the self-rotating water tank is wrapped with a reverse osmosis filter screen; the self-rotating water tank is integrally arranged on the supporting plate and comprises a rotatable vertical shaft on the supporting plate and a self-rotating tank body fixedly arranged on the vertical shaft, a self-flushing water inlet is formed in the top of the tank body, the tank body is integrally of a cuboid structure, flushing slots which are arranged in a crossed and symmetrical mode are formed in the vertical edges of the cuboid, and the tank body is driven to generate self-rotating motion through the vertical shaft by utilizing the pressure difference of water flow sprayed outwards by the flushing slots;
the turning plate seal comprises a plurality of symmetrically arranged turning plates which can rotate along a fixed shaft and transverse plates with symmetry centers capable of moving up and down;
the water purifying part is positioned at the upper part of the box body and is a space formed by the upper part of the punching plate and the upper part of the top plate of the box body; a water outlet is arranged on the top plate of the water purifying part box body, and a lever seal is arranged at the water outlet; meanwhile, a pressure relief port is arranged on the top plate of the box body, and the height of the pressure relief port is higher than that of the water outlet;
the lever seal has the specific structure that: a lever fixing shaft is arranged on the top plate of the box body, one end of the lever is provided with a sealing valve for sealing the water outlet, and the other end of the lever is provided with a water tank with a built-in balancing weight;
the lever fixing shaft is arranged on a partition plate which divides the water purifying part into a water outlet part and a back flushing delay control part, and the pressure relief port is positioned on the back flushing delay control part; the water outlet part is used for discharging the filtered clean water, and the clean water of the back flushing delay control part is discharged through the pressure relief port;
the back flushing control part comprises a water feeding pipe which is arranged on the outer wall of the box body and is communicated with the water filtering part, a liquid level groove which is formed by extending the water feeding pipe, and an upward floating seal which is arranged in a cavity body formed by the liquid level groove and the outer wall of the box body, and a bottom plate in the cavity body is provided with a sewage discharging port which discharges sewage downwards in a unidirectional way; the overflow port of the liquid level tank is higher than the overflow port of the water purifying part, and sewage enters a cavity formed by the liquid level tank and the side wall of the tank body along the overflow port of the liquid level tank of the water feeding pipe of the backwash control part;
the floating seal comprises the following specific structures: the upper floating device drives the sealing ball to move upwards through the connecting rod under the action of buoyancy, so as to open a drainage port sealed by the sealing ball and further open a water drain, and in the continuous upward displacement movement process of the sealing ball, the transverse plate in the turnover plate seal is further driven to move upwards through mechanical thrust;
the turning plate seal of the water filtering part and the floating seal of the back flushing control part together form a composite seal for opening or closing the water outlet.
2. The self-rotating mechanical automatic backwash sewage treatment device according to claim 1, wherein the perforated plate is made of stainless steel plates; the pore diameter of the permeable pore is as follows: 2-3 mm.
3. The apparatus for automatically and mechanically washing back sewage by self-rotation according to claim 1, wherein the total slit is 60cm long and 3mm wide on four vertical sides of a rectangular water tank with a height of 1 meter when the specification of the self-rotation water tank is designed in the water filtering part.
4. The self-rotating mechanical automatic backwash sewage treatment device according to claim 1, wherein in the water filtering part, a 100-300 mesh filter screen is adopted as the reverse osmosis filter screen.
5. The self-rotating mechanical automatic backwash sewage treatment device as claimed in claim 1, wherein one or a plurality of symmetrically arranged water storage areas are arranged in the upper part of the punching plate or along the punching plate of the water purification part.
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| CN201910023467.0A CN109464847B (en) | 2019-01-10 | 2019-01-10 | Automatic back flush sewage treatment plant of autogiration formula machinery |
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| CN201910023467.0A CN109464847B (en) | 2019-01-10 | 2019-01-10 | Automatic back flush sewage treatment plant of autogiration formula machinery |
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| CN109464847B true CN109464847B (en) | 2023-09-26 |
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| CN109876538A (en) * | 2019-04-01 | 2019-06-14 | 郑州碧兴环保科技有限公司 | A kind of mechanical automation backwashing sewage water processing unit |
| CN114524294B (en) * | 2022-03-28 | 2022-11-29 | 衡阳市建衡实业有限公司 | Domestic sewage treatment agent dispensing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201959617U (en) * | 2010-12-24 | 2011-09-07 | 浙江沁园水处理科技有限公司 | Automatic cleaning type filter device |
| CN203060935U (en) * | 2012-11-28 | 2013-07-17 | 石河子市金土地节水设备有限公司 | Self-cleaning type filter |
| WO2018044137A1 (en) * | 2016-09-05 | 2018-03-08 | (주) 테크로스 | Backwashing filter device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1363717A1 (en) * | 2001-01-18 | 2003-11-26 | Nicholas Jackson | Filter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201959617U (en) * | 2010-12-24 | 2011-09-07 | 浙江沁园水处理科技有限公司 | Automatic cleaning type filter device |
| CN203060935U (en) * | 2012-11-28 | 2013-07-17 | 石河子市金土地节水设备有限公司 | Self-cleaning type filter |
| WO2018044137A1 (en) * | 2016-09-05 | 2018-03-08 | (주) 테크로스 | Backwashing filter device |
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