CN206089283U

CN206089283U - Sewage treatment equipment

Info

Publication number: CN206089283U
Application number: CN201621114019.XU
Authority: CN
Inventors: 金耘
Original assignee: Individual
Current assignee: Tai Tong Construction Co ltd
Priority date: 2016-10-12
Filing date: 2016-10-12
Publication date: 2017-04-12
Anticipated expiration: 2026-10-12

Abstract

The utility model provides a coagulating basin, air supporting pond and pulse depositing reservoir that sewage treatment equipment includes that it connects to follow the water flow direction order, the pulse depositing reservoir includes pulse generator, inlet channel, depositing reservoir, sludge thickening room, clarified water collecting vat, clarified water discharge tube and distribution pipeline, be provided with a mixed contact chamber of powder activity carbon in the inlet channel. The utility model discloses an establish ties to use coagulating basin, air supporting pond and the pulse depositing reservoir that has an active carbon adsorption function, for the medicament of avoiding coagulating basin and air supporting pond to throw adding disturbs active carbon adsorption, therefore the back pulse depositing reservoir of having established ties to the contact time of extension powder activity charcoal and water, and preceding coagulating basin is thrown the medicament that adds with the air supporting pond and can be got rid of phosphorus and SS, also can eliminate the adsorption interference of back active carbon to COD, middle air supporting pond dissolve the contact that mixes that the air water can promote flco and water, be favorable to getting rid of partial dissolubility COD, reduce the dosage of throwing of follow -up powder activity charcoal.

Description

Sewage treatment equipment

Technical Field

The utility model relates to a sewage treatment device.

Background

In a typical wastewater treatment plant, the primary precipitation is typically carried out to remove suspended matter from the wastewater, and insoluble matter is removed, for example, by aerobic or anaerobic digestion, or in a series of different sequences. After primary sedimentation, the sewage enters secondary sedimentation to recover biological sludge, and is discharged out of a sewage treatment system through disinfection, filtration and the like. Under the prior art, the raw water from the secondary sedimentation tank contains a large amount of COD after sewage treatment, wherein most of the COD is inert COD difficult to degrade biochemically and dissolve or is called Hard COD, and the COD is difficult to remove by common biochemical reaction and common coagulating sedimentation method.

The feasible proposal is to adopt coagulation and/or air flotation or connect a pulse clarification tank for treatment. The flocculation reagent dosage in the coagulation and/or air floatation treatment is large, the sludge bed is lacked, the hydraulic load is higher, the removal effect on COD is limited, and the flocculation effect is not good.

The pulse clarification tank is a water treatment device for separating suspended solid particles from liquid by using a sedimentation method, for example, CN 1176839A discloses a water treatment device of the pulse clarification tank, which comprises a pulse generator, a water inlet chamber, a water inlet pipe, a water inlet well, a water distribution gallery, a perforated water distribution pipe, a steady flow herringbone plate, an inclined plate, a water outlet tank, a sludge collection hopper, an exhaust pipe and a sludge discharge pipe, wherein the inclined plate or a honeycomb inclined pipe is arranged in a sludge-water separation zone above the height of the sludge hopper of the water treatment device of the pulse clarification tank. For raw water with the temperature of below 20 ℃, the inclined plate or the honeycomb inclined tube of the sludge-water separation zone can remove suspended particles entering the upper part of the pulse clarification tank due to the expansion of the suspended layer, so that the suspended particles cannot enter the clear water zone to influence the treatment effect of the water treatment device of the pulse clarification tank.

CN 101862554 a also discloses a pulse clarifier, which is clearly described in the background section, and is generally divided into a sludge circulation (reflux) mode and a sludge suspension (filtration) mode according to the sludge condition. The pulse clarification tank belongs to a suspended sludge type clarification tank and consists of a pulse generator system, a water distribution and flow stabilization system, a clarification system and a sludge discharge system. The distribution of the concentration of the suspended layer sludge is automatically adjusted by using a pulse water distribution method, and the water is filled and discharged according to a certain period, so that the suspended layer sludge alternately expands and contracts, the collision contact chance of raw water particles and the sludge is increased, and the clarification effect is improved. The prior art has the following defects: the ascending flow velocity is small, the tank body area is large, and the occupied area is large; the sludge concentration is small, and the flocculation effect is poor; the quality of the effluent is poor. This prior art solves the scheme of prior art's defect and also sets up the one deck pipe chute between sludge blanket and clear water layer, and its purported technical effect is through adopting the pipe chute device, compares with current pulse clarification tank, has improved hydraulic load, reduces substantially to take up an area of, and sludge blanket sludge concentration is higher, does benefit to getting rid of aquatic solid particle. However, the technical solution of the prior art is not clearly different from the disclosure of CN 1176839A, and is actually only suitable for clarifying the suspended sludge, the concentration of the sludge layer intercepted and deposited by the inclined tube is low, even if the sludge overflowing into the mud bucket of the concentration chamber is thin, the particulate matter removing effect is limited, and the prior art is only suitable for raw water treatment with relatively few flocculated particles.

The existing pulse clarification tank has fast mixing speed and short treatment time, and has very limited removal of COD which is difficult to degrade by biochemical means due to solubility. In addition, the sludge concentration effect is not good.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a sewage treatment device that can be used to sewage treatment to reduce or avoid the aforementioned problem.

For solving the technical problem, the utility model provides a sewage treatment device, include coagulation basin, air supporting pond and the pulse clarification tank that connects along the rivers direction order, the pulse clarification tank includes pulse generator, inlet channel, clarification tank, sludge thickening room, clarified water collecting vat, clarified water discharge pipe and water distribution pipeline, wherein, be provided with a powder activated carbon mixed contact pond in the inlet channel, mud in the sludge thickening room passes through the sludge conduit and discharges to a storage mud pond, store up the mud pond through backflow pipeline with powder activated carbon mixed contact pond links to each other, it is provided with the mud pipe way to store up the mud pond, be provided with the pipe chute between the carbon mud layer and the clarified water collecting vat of clarification tank and sludge thickening room.

Preferably, two clarification tanks are symmetrically arranged on two sides of the sludge concentration chamber, the sludge concentration chamber is separated from the two clarification tanks by two sludge overflow walls which are arranged in parallel, and a wedge-shaped space with a wide top and a narrow bottom is formed between the two sludge overflow walls.

Preferably, a plurality of partitions are arranged in the sludge concentration chamber at equal intervals and are perpendicular to the sludge overflow walls, each partition is provided with an equilateral triangle section with a narrow top and a wide bottom, and two adjacent partitions and the sludge overflow walls on two sides form a mud bucket with four sides which are wide top and narrow bottom.

Preferably, the sludge discharge inlet of the sludge pipeline extends into the bottom of each sludge hopper.

Preferably, a circulation pump is arranged in the return line.

Preferably, a sludge pump is arranged in the sludge pipeline.

Preferably, a stirring device is arranged in the powdered activated carbon mixing and contacting pool.

Preferably, the coagulation basin is provided with a stirring device.

Preferably, the air flotation tank is provided with a dissolved air device and a scum scraping device.

Preferably, the sewage treatment equipment is connected in series with a plurality of coagulation tanks and/or a plurality of air flotation tanks.

The utility model discloses a sewage treatment device uses coagulation tank, air supporting pond and pulse clarification tank through establishing ties, and the pulse clarification tank sets up powder activated carbon and mixes the contact tank, in order to avoid the medicament of coagulating tank and air supporting pond throwing to adsorb the interference to the powder activated carbon, therefore the back has established ties the pulse clarification tank with activated carbon adsorption function to prolong the contact time of powder activated carbon and water; the agents added into the front coagulation tank and the air flotation tank can remove phosphorus and SS and also can eliminate the adsorption interference of the activated carbon at the back on COD; the gas dissolving water in the middle air floatation tank can promote the mixed contact of flocs and water, is favorable for removing partial soluble COD and reduces the adding amount of subsequent powdered activated carbon.

The arrangement of the powdered activated carbon mixed contact tank can upgrade the original pure clarification effect of the existing pulse clarification tank into the function of powdered activated carbon adsorbing other organic pollutants such as COD, BOD and the like in water except for clarification; can realize "security" interception to organic pollutant, reduce pollutant concentration fluctuation and cause the influence to effluent quality of water, get rid of the effect best to the chemical industry waste water of difficult degradation, municipal wastewater inertia COD. In addition, compared with the existing pulse clarification tank, the utility model also provides an improved scheme of carbon mud backflow, which has higher economic efficiency improvement on sewage treatment with larger inlet water quality fluctuation; the method has better effect on the water treatment of water supply security type with light water source pollutants.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,

FIG. 1 is a schematic structural view of a sewage treatment apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view showing a configuration of an embodiment of a pulse clarifier in the sewage treatment apparatus shown in FIG. 1.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.

Based on the prior art's defect mentioned in the background art part, the utility model provides a sewage treatment device, refer to fig. 1, it shows according to the utility model discloses a sewage treatment device's of a specific embodiment schematic structure diagram.

The sewage treatment apparatus shown in the figure comprises a coagulation tank 300, an air flotation tank 200 and a pulse clarification tank 100 which are connected in sequence in the water flow direction. That is, the utility model discloses an it is not enough to overcome to adopt alone among the prior art to coagulate and/or air supporting to handle and pulse clarification tank flocculation, to the limited defect of the effect of getting rid of COD, provides one kind and will coagulate pond 300, air supporting pond 200 and the scheme that pulse clarification tank 100 establishes ties and use, through thoughtlessly congeal with air supporting treatment stage throw PAC, PAM medicament respectively and carry out chemical phosphorus removal and get rid of the SS, then adsorb COD through pulse clarification tank.

Particularly, the utility model discloses a pulse clarification tank 100 includes pulse generator 1, inlet channel 2, clarification tank 3, sludge thickening room 4, clarified water collecting vat 5, clarified water discharge conduit 6 and water distribution pipeline 7 isotructure, and its concrete structure is as shown in fig. 2, and it shows the schematic structure of a concrete embodiment of the pulse clarification tank among the sewage treatment device shown in fig. 1.

In fig. 2, the utility model discloses a pulse clarification tank 100 is showing the difference with prior art, the utility model discloses set up a powder activated carbon and mixed contact tank 21 in inlet channel 2, mix contact tank 21 through powder activated carbon and add powder activated carbon to the former water, through adding throwing of increasing powder activated carbon, the suspension mud sediment that will have the pulse pond to form is replaced by the carbon slime layer (not shown in the figure) with carbon slime as owner and mud sediment for assisting. Namely, by arranging the powdered activated carbon mixed contact tank 21, the utility model upgrades the original pure clarification effect of the existing pulse clarification tank into a novel function that the powdered activated carbon except clarification adsorbs other organic pollutants such as COD, BOD and the like in water; realize the 'security protection' interception of organic pollutants, reduce the influence on the quality of the effluent water caused by the fluctuation of the concentration of the pollutants. Experiments prove that the improvement of the utility model has the best effect of removing inert COD in the chemical wastewater and the municipal wastewater which are difficult to degrade; the treatment effect and the guarantee effect on the urban drinking water at the downstream of the drinking water source (pollutant-enriched water source) are good.

Returning to the detailed description of the pulse clarification tank 100, the utility model discloses a sewage treatment device shown in figure 1 can see that the utility model is not only characterized in that the coagulation tank 300, the air flotation tank 200 and the pulse clarification tank 100 are used in series, but also the pulse clarification tank 100 is used to adopt the physical adsorption function of the powdered activated carbon to obtain the removal of insoluble COD, BOD and the like.

Specifically, because the coagulation tank 300 and the air flotation tank 200 lack sludge beds and have high hydraulic load, the pulse clarification tank 100 with the powdered activated carbon adsorption function can overcome the defects of short carbon-water contact time and limited removal of dissolved COD which is difficult to degrade biochemically.

In addition, during the process of removing the SS in the sewage, the PAC and the PAM which are chemically dephosphorized and added in the coagulation tank 300 and the air flotation tank 200 interfere with the adsorption of the powdered activated carbon, so that the consumption of the powdered activated carbon is increased, the adsorption saturation of the powdered activated carbon is not fully utilized, and the consumption of the powdered activated carbon is increased. Therefore, the best condition of the powdered activated carbon adsorption is to prolong the contact time of the powdered activated carbon and water as much as possible, and only the mud bed type filtering system is adopted to provide sufficient carbon-water contact time, which is one of the important reasons for the pulse clarification tank 100 with the powdered activated carbon adsorption function connected in series after the coagulation tank 300 and the air flotation tank 200. Namely, firstly, adding medicine to perform coagulation flocculation, performing precipitation or air flotation, performing chemical phosphorus removal and SS removal, eliminating the adsorption interference on COD which is difficult to degrade biochemically in solubility, then adopting a powdered activated carbon mixing contact tank 21 to fully mix sewage and powdered activated carbon, finally entering a clarification tank 3 to perform activated carbon adsorption, forming an activated carbon bed in the tank, and realizing water-carbon separation.

Moreover, on the premise of mixing and adsorbing the subsequent single activated carbon, the former chemical phosphorus removal and SS removal process can adopt precipitation or air flotation. Considering that the suspended matters in the effluent of the secondary sedimentation tank are light, and the gas dissolving water in the air floatation tank can promote the mixed contact of flocs and water, the removal of partial soluble COD is facilitated, and the adding amount of subsequent powdered activated carbon is reduced, so that the air floatation process adopted after coagulation is more beneficial. This is one of the important reasons for the present invention to establish the air flotation tank 200 in series between the coagulation tank 300 and the pulse clarification tank 100 having the powdered activated carbon adsorption function.

Through the above analysis, the utility model discloses it is very useful to use coagulation basin 300, air supporting pond 200 and pulse clarification tank 100 along the water flow direction in order to establish ties: coagulant, such as PAC, can be put into the coagulation tank 300, and the coagulation process is accelerated by the stirring equipment 301; flocculating agent such as PAM can be put into the floatation tank 200, dissolved air is introduced through the dissolved air device 201 to bring the scum to the water surface, and most of the scum is scraped by the scum scraping device 202 and discharged out of the floatation tank 200; the rest raw water enters the pulse clarification tank 100 through the water inlet pipeline 2 for treatment. In order to avoid the interference of the added PAC and PAM on the adsorption of the powdered activated carbon, a pulse clarification tank 100 with an activated carbon adsorption function is connected in series behind the PAC and PAM to prolong the contact time of the powdered activated carbon and water; PAC and PAM added in the front coagulation tank 300 and the air floatation tank 200 can remove phosphorus and SS and also can eliminate the adsorption interference of the activated carbon at the back on COD; the gas dissolving water in the middle air floatation tank 200 can promote the mixing contact of flocs and water, is favorable for removing partial soluble COD and reduces the adding amount of subsequent powdered activated carbon. Therefore, the coagulation tank 300, the air flotation tank 200, and the pulse clarification tank 100 of the present invention are not simply combined, but have special applications in the front-rear order, and cannot be adjusted arbitrarily. Of course, it should be understood by those skilled in the art that, under the specific connection sequence of the present application shown in fig. 1, a plurality of coagulation tanks 300 and/or a plurality of flotation tanks 200 may be connected in series as required, for example, two sets of coagulation tanks 300 are connected in series in fig. 1, and one or two sets of flotation tanks 200 may be connected in series.

Further, as shown in fig. 2, the sludge in the sludge concentrating chamber 4 is discharged to a sludge storage tank 81 through the sludge pipe 8, the sludge storage tank 81 is connected to the powdered activated carbon mixed contact tank 21 through a return pipe 82, the sludge storage tank 81 is provided with a sludge discharge pipe 83, and an inclined pipe is provided between the carbon sludge layer of the clarification tank 3 and the sludge concentrating chamber 4 and the clarified water collection tank 5 (not shown in fig. 2, see fig. 1). That is, since the present invention adds powdered activated carbon, a carbon sludge layer is formed in the clarifier 3 and the sludge concentrating chamber 4, the carbon sludge layer and the inclined pipe are not drawn in fig. 2 (the inclined pipe and the carbon sludge layer therebelow are schematically shown in fig. 1) in order to show the structure of the lower part of the carbon sludge layer, such as the water distribution pipe 7, the current plate 9, and the like, and the clear water collecting tank 5 in the figure is also schematically shown above the clear water layer.

Compare current pulse clarification tank, the utility model discloses still provide the improvement scheme of charcoal mud backward flow, through setting up backflow pipeline 82 in storing up mud pond 81, carry out reutilization in the mixed contact pond 21 of fresh unsaturated charcoal mud backward flow transport to powder active carbon in will storing up mud pond 81. The improved scheme of carbon mud backflow has higher economic efficiency improvement on sewage treatment with larger fluctuation of inlet water quality; the method has a good effect on the water treatment of the water supply security type with light water source pollutants, the carbon sludge which is not adsorbed and saturated can be applied again, and the carbon sludge which is adsorbed and saturated can be discharged through the sludge discharge pipeline 83 for subsequent treatment.

In one embodiment, as shown in the figure, two clarifiers 3 are symmetrically arranged on two sides of the sludge concentration chamber 4, the sludge concentration chamber 4 is separated from the two clarifiers 3 by two sludge overflow walls 31 arranged in parallel, and a wedge-shaped space with a wide top and a narrow bottom is formed between the two sludge overflow walls 31. That is the utility model discloses a both sides at sludge concentration room 4 are symmetrical side by side and are set up two depositing reservoirs 3, the centre separates through two mud overflow walls 31, can make full use of space, just also two depositing reservoirs 3 can share a sludge concentration room 4, the mud that forms piles up after exceeding the height of mud overflow wall 31 in two depositing reservoirs 3, can cross the overflow of mud overflow wall 31 in to the sludge concentration room 4 in the centre, therefore the efficiency that mud was collected to sludge concentration room 4 can improve at double, but the space that the place occupy still less than prior art, space utilization is also higher. In addition, the narrow wedge space under the wide upper portion that forms between two mud overflow walls 31 is convenient for on the one hand the mud overflow come later smoothly along both sides inclined plane inflow sludge concentration room 4, and the narrow wedge space is favorable to forming bigger concentration intensity in the bottom of sludge concentration room 4 under the wide upper portion on the other hand for the mud of bottom obtains bigger compressive force, is favorable to squeezing out the moisture in the mud fast and obtains the concentrated mud of higher sludge concentration.

Further, in another embodiment, a plurality of partitions 32 are arranged in the sludge concentrating chamber 4 at equal intervals perpendicular to the sludge overflow walls 31, the partitions 32 have an equilateral triangle cross section with a narrow top and a wide bottom, and two adjacent partitions 32 and the sludge overflow walls 31 on two sides form a mud bucket 41 with four sides all wide top and narrow bottom. That is, the sludge concentrating compartment 4 forms a plurality of hoppers 41 by providing partitions 32, each hopper 41 is separated independently from the other, and the four sides of the hopper 41 are inclined planes each having a wide top and a narrow bottom, similar to the shape of the "hopper" for weighing rice in the ancient times. The utility model discloses a mud bucket 41 of this kind of independent structure can be so that the mud in every mud bucket 41 independently concentrates, when avoiding different regional mud concentration differences to concentrate, the mud lateral flow of different concentrations leads to concentration efficiency to reduce. In addition, the partition walls 32 are arranged perpendicular to the sludge overflow wall 31 at equal intervals, so that the structure of each mud bucket 41 can be kept completely the same, and the slopes of two opposite faces of the mud buckets 41 are the same, so that the compression force on two sides is uniform, the concentration efficiency can be further improved, the slopes with the same slopes are easier to construct, and the construction cost and time can be saved.

In yet another embodiment, the sludge inlet of the sludge conduit 8 extends into the bottom of each hopper 41, i.e., corresponding to each hopper 41, the sludge conduit 8 is provided with a plurality of branch pipes 89, and the sludge inlet of the end of each branch pipe 89 extends into the bottom of each hopper 41. The embodiment concentrates the sludge through the hopper-shaped structure of the hopper 41, the accumulated acting force of the upper layer of the sludge at the bottom of the hopper 41 is the largest, so that the sludge discharging inlet of the branch pipe 89 of the sludge pipeline 8 extends into the bottom of the hopper 41, the sludge can be extruded into the sludge pipeline 8 through the pressure, when the depth of the hopper 41 is further deepened, and the sludge can be discharged into the sludge storage tank 81 through the sludge pipeline 8 even without an additional sludge discharging pump. Certainly, a mud pump (not shown in the figure) is arranged in the sludge pipeline 8, which is also a scheme that can be selected by the application, and under the condition that the design depth of the mud bucket 41 is proper, the performance requirement on the mud pump can be reduced, and a part of equipment cost can be saved.

Further, to increase the return flow rate and efficiency, a circulation pump 84 may be provided in the return line 82, as shown. In addition, in order to improve the mixing efficiency, a stirring device 22 may be further provided in the powdered activated carbon mixing and contacting tank 21.

The working principle of the pulse clarification tank 100 of the utility model is as follows:

after the raw water is treated by the coagulation tank 300 and the floatation tank 200, the remaining raw water enters the powdered activated carbon mixed contact tank 21 through the water inlet pipe 2, and contacts and reacts with the powdered activated carbon in the powdered activated carbon mixed contact tank 21, and of course, chemical agents such as PAC and PAM, etc. for removing SS and chemical phosphorus, may be further added into the powdered activated carbon mixed contact tank 21.

The mixed residual raw water enters the bottom of the pulse generating device 1 through the water inlet pipeline 2, and enters the clarification tanks 3 at two sides through the water distribution pipeline 7 in a pulse mode through the vacuum generating device of the pulse generating device 1. The rectification inclined plate in the clarification tank 3 realizes uniform water distribution by means of a resistance water distribution principle, suspended particles are combined with powdered activated carbon to form a carbon mud and floc layer, and incompletely separated micro flocs are intercepted by the inclined tube and slide down to the carbon mud layer along the inclined tube to realize secondary clarification; the accumulated carbon mud and the floc layer can filter and intercept impurities in water and can adsorb and remove organic pollutants such as COD (chemical oxygen demand), BOD (biochemical oxygen demand) and the like. The clear water is collected and led out through a clear water collecting tank 5 and a clear water discharge pipeline 6.

As the accumulation of sludge rises, the sludge in the two-sided clarifier 3 overflows over the sludge overflow wall 31 into the middle sludge concentration chamber 4, and is concentrated in each hopper 41.

The concentrated sludge is discharged to a sludge storage tank 81 through a sludge pipeline 8, fresh unsaturated carbon sludge in the sludge storage tank 81 is conveyed back to the powdered activated carbon mixing contact tank 21 for secondary utilization, and the carbon sludge with saturated adsorption is discharged through a sludge discharge pipeline 83 for subsequent treatment.

To sum up, the sewage treatment equipment of the utility model uses the coagulation tank, the air flotation tank and the pulse clarification tank in series, the pulse clarification tank is provided with the powdered activated carbon mixed contact tank, so as to avoid the adsorption interference of the medicament added into the coagulation tank and the air flotation tank on the powdered activated carbon, and the pulse clarification tank with the activated carbon adsorption function is connected in series at the back, so as to prolong the contact time of the powdered activated carbon and water; the agents added into the front coagulation tank and the air flotation tank can remove phosphorus and SS and also can eliminate the adsorption interference of the activated carbon at the back on COD; the gas dissolving water in the middle air floatation tank can promote the mixed contact of flocs and water, is favorable for removing partial soluble COD and reduces the adding amount of subsequent powdered activated carbon.

The arrangement of the powdered activated carbon mixed contact tank can upgrade the original pure clarification effect of the existing pulse clarification tank into the function of powdered activated carbon adsorbing other organic pollutants such as COD, BOD and the like in water except for clarification; can realize "security" interception to organic pollutant, reduce pollutant concentration fluctuation and cause the influence to effluent quality of water, get rid of the effect best to the chemical industry waste water of difficult degradation, municipal wastewater inertia COD.

In addition, compared with the existing pulse clarification tank, the utility model also provides an improved scheme of carbon mud backflow, which has higher economic efficiency improvement on sewage treatment with larger inlet water quality fluctuation; the method has better effect on the water treatment of water supply security type with light water source pollutants.

It is to be understood by those skilled in the art that while the present invention has been described in terms of several embodiments, it is not intended that each embodiment cover a separate embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.

Claims

1. The sewage treatment equipment is characterized by comprising a coagulation tank (300), an air flotation tank (200) and a pulse clarification tank (100) which are sequentially connected along the water flow direction, wherein the pulse clarification tank (100) comprises a pulse generation device (1), a water inlet pipeline (2), a clarification tank (3), a sludge concentration chamber (4), a clarified water collecting tank (5), a clarified water discharge pipeline (6) and a water distribution pipeline (7), a powdered activated carbon mixed contact tank (21) is arranged in the water inlet pipeline (2), sludge in the sludge concentration chamber (4) is discharged to a sludge storage tank (81) through a sludge pipeline (8), the sludge storage tank (81) is connected with the powdered activated carbon mixed contact tank (21) through a backflow pipeline (82), and the sludge storage tank (81) is provided with a sludge discharge pipeline (83), and an inclined pipe is arranged between the carbon sludge layer of the clarification tank (3) and the sludge concentration chamber (4) and the clarified water collecting tank (5).

2. The sewage treatment apparatus according to claim 1, wherein two of said clarification tanks (3) are symmetrically arranged on both sides of said sludge concentrating chamber (4), said sludge concentrating chamber (4) is separated from said two clarification tanks (3) by two sludge overflow walls (31) arranged in parallel, and a wedge-shaped space with a wide top and a narrow bottom is formed between said two sludge overflow walls (31).

3. The sewage treatment apparatus according to claim 2, wherein a plurality of partitions (32) are arranged in the sludge concentration chamber (4) at equal intervals perpendicular to the sludge overflow walls (31), the partitions (32) have an equilateral triangle section with a narrow top and a wide bottom, and two adjacent partitions (32) and the sludge overflow walls (31) on two sides form a mud bucket (41) with four sides each having a wide top and a narrow bottom.

4. Sewage treatment plant according to claim 3, characterised in that the sludge inlet of said sludge conduit (8) extends into the bottom of each of said hoppers (41).

5. Sewage treatment plant according to any of claims 1-4, characterised in that a circulation pump (84) is arranged in said return conduit (82).

6. Sewage treatment plant according to any of claims 1-4, characterised in that a sludge pump is arranged in said sludge conduit (8).

7. The wastewater treatment plant according to any of claims 1 to 4, characterized in that the powdered activated carbon mixing and contacting tank (21) is provided with a stirring device (22).

8. Sewage treatment plant according to any of claims 1 to 4, characterised in that said coagulation basin (300) is provided with a stirring device (301).

9. The wastewater treatment plant according to any of claims 1 to 4, characterized in that the flotation tank (200) is provided with a dissolved air device (201) and a scum scraping device (202).

10. The wastewater treatment plant according to any of claims 1 to 4, characterized in that it is provided with a plurality of coagulation tanks (300) and/or a plurality of flotation tanks (200) in series.