CN214614508U - Multifunctional double-layer regulation and storage tank suitable for high-density built-up area - Google Patents

Abstract

The utility model discloses a multi-functional double-deck regulation pond suitable for high density is built into district, the regulation pond includes that the setting is upper rainwater regulation pond and lower floor's sewage regulation pond that distribute from top to bottom through the baffle partition, the end of intaking in rainwater regulation pond has connected gradually upper rainwater inlet tube, thick grid, has dragged for sand ware, thin grid and upper sump pit, the end of intaking in sewage regulation pond has connected gradually lower floor's sewage inlet tube and lower floor's sump pit, rainwater regulation pond and sewage regulation pond communicate through the access hole that sets up on rainwater regulation pond lateral wall. The utility model discloses a double-deck regulation pond has stable in structure, and the energy consumption is low, takes up an area of high-usage, and the cell body high-usage uses advantages such as number of times and guarantee rate height.

Description

Multifunctional double-layer regulation and storage tank suitable for high-density built-up area

Technical Field

The invention belongs to the technical field of rainwater and sewage regulation and storage, and particularly relates to a multifunctional double-layer regulation and storage tank suitable for a high-density constructed area.

Background

At present, the domestic regulation and storage tank mainly has the functions of initial rainwater regulation and storage and sewage peak regulation and storage.

The initial rainwater generally refers to a part of rainwater runoff formed by rainfall erosion on the ground at different catchment surfaces, and is an empirical concept obtained according to an erosion rule under specific rainfall conditions.

Rainfall in China often appears in local areas, especially southern areas, and the characteristic of strong short-term intensity is often presented, because instantaneous flow in a pipeline system is large during rainfall, sewage plants are often difficult to process in time, in order to control the influence of initial rain pollution on a river channel, initial rain is collected and temporarily stored in a regulation and storage tank generally adopted in China at present, and the initial rain stored in the regulation and storage tank is uniformly discharged into a municipal sewage system when the treatment load of a sewage treatment plant is low after rainfall, and is conveyed to the sewage treatment plant for treatment.

In addition, some cities in China develop rapidly, the peak period change coefficient is far larger than the design specification value due to the population tide phenomenon, and the situation that the sewage treatment capacity is insufficient in the peak period is presented, so that the situation that the water quality of a river channel is polluted by overflow in front of a sewage plant occurs. The sewage regulation and storage tank is constructed to effectively solve the problems of overflow before the sewage plant in the peak period of the sewage plant, high water inflow impact load and the like, part of sewage is separated from the sewage system in the sewage plant in the peak period of the water inflow of the sewage plant to be collected and stored, and the sewage stored in the regulation and storage tank is discharged into the sewage plant when the treatment load of the sewage plant is relatively small.

With the development of cities, the growth of population and the continuous improvement of national requirements on the field of water environment treatment, the planning and construction of the storage tank are valued and developed, the number of domestic application cases of the storage tank is increased, but the construction of the storage tank generally has the following problems:

1. the problem of land utilization. At present, the acceptance degree of a storage tank is generally higher in developed cities, the pipe network construction in the areas is relatively perfect, and the requirement on the water environment is higher, but the urban building density is higher, so that a large amount of idle land is difficult to be used for the storage tank construction. At present, site selection of regulation and storage pool construction is generally concentrated on planning green land and water service land, but the property plots in part of developed cities are often characterized by small area, zero dispersion, irregularity and the like. How to fully utilize the scattered lands with small areas to construct the storage tank meeting the water collection requirement and ensure that the function of the storage tank is not influenced is a main problem of constructing the storage tank in a high-density constructed area at present.

2. The problem of single operation mode. The rainwater regulation and storage tank is mainly used for initial rain, usually started in rainy days and vacant in sunny days; the sewage regulation pond is mainly to sewage, launches at sewage rush hour usually, and sewage valley period vacancy, traditional rain sewage mix regulation pond hardly combines two kinds of operation modes, and the regulation pond must satisfy above-mentioned two vacancy conditions simultaneously and just can empty the row in the regulation pond, prepares next regulation, and this restriction condition significantly reduced the adjustable number of times of regulation pond in a year. How to guarantee the functional diversity of the regulation and storage tank without sacrificing the regulation times of the regulation and storage tank is a main problem of the design of the prior multifunctional regulation and storage tank.

3. Regulating the burial depth of the storage tank body. The buried depth of the regulating and storing pool is greatly influenced by the elevation of the water inlet pipe, the effective water level of the regulating and storing pool must be calculated from the bottom elevation of the water inlet pipe downwards, the buried depth of the sewage pipe is limited by the slope and is usually deep, and particularly the buried depth of the pipeline can reach more than 6m before the tail end of the sewage pipe enters a sewage plant. To the regulation pond that has the sewage regulation function, especially the regulation pond before sewage factory, all present basically and bury deeply, the earthing is thick, the characteristics that the headroom is high, these characteristics can cause the regulation pond construction investment height on the one hand, the difficult scheduling problem of excavation supporting, on the other hand also can be unfavorable to the stability of regulation pond body structure, simultaneously in later stage regulation pond operation in-process, darker water level needs the water pump of great lift to promote, also can cause the energy consumption height, move difficult scheduling problem.

Based on the situation, the invention provides a multifunctional double-layer storage tank suitable for a high-density constructed area, and the problem can be effectively solved.

Disclosure of Invention

The invention aims to provide a multifunctional double-layer storage tank suitable for a high-density built-up area. The highly-integrated multifunctional double-layer regulation and storage tank suitable for the high-density constructed area is characterized in that due to the existence of a double-layer structure, each layer can independently operate according to actual operation conditions, the combined use under different conditions such as sunny day, early rainfall, sewage peak period, sewage valley period and the like is met, and the two layers can be communicated for use under necessary conditions.

The invention is realized by the following technical scheme:

the utility model provides a multi-functional double-deck regulation pond suitable for high density built-up area, the regulation pond includes separates the upper rainwater regulation pond and the lower floor sewage regulation pond that the setting is upper and lower distribution through the baffle, the end of intaking in rainwater regulation pond has connected gradually upper rainwater inlet tube, thick grid, drags for husky ware, thin grid and upper sump pit, the end of intaking in sewage regulation pond has connected gradually lower floor's sewage inlet tube and lower floor's sump pit, rainwater regulation pond and sewage regulation pond communicate through the access hole that sets up on rainwater regulation pond lateral wall.

In the structure, the upper rainwater inlet pipe is used for controlling external rainwater to enter the upper layer of the regulation and storage pool, the coarse grating is used for intercepting coarse suspended matters and impurities in rainwater, the sand bailer is used for sinking large suspended matters in the rainwater, the fine grating is used for intercepting fine impurities in the rainwater, and the upper water collecting pit is used for collecting accumulated water in a regulation and storage area; the lower-layer sewage inlet pipe is used for controlling external sewage to enter the lower layer of the storage regulation tank, and the lower-layer water collection pit is used for collecting accumulated water in the storage regulation area; the lateral wall of upper rainwater regulation pond is equipped with the access hole and is sealed by the gate for the maintenance on regulation pond upper strata, and the connection of upper strata and lower floor under special circumstances.

As a more preferable technical scheme of the invention, the rainwater storage tank further comprises an upper layer intelligent ejector arranged in the middle and an upper layer exhaust main pipe arranged at the top; an upper layer exhaust pipe air valve is arranged at the upper layer exhaust main pipe, and an upper layer exhaust system can be independently closed when the upper layer exhaust pipe air valve is closed.

In the structure, the upper-layer intelligent injector is used for flushing the upper layer of the regulation pool after the regulation pool is emptied; the upper layer of exhaust main pipe is used for collecting odor on the upper layer in the tank body, and the upper layer top plate is provided with an exhaust fan for ventilation on the upper layer.

As a most preferred technical scheme of the invention, the sewage storage tank also comprises a lower-layer intelligent ejector arranged in the middle and a lower-layer exhaust main pipe arranged at the top; the lower layer air exhaust pipe air valve is arranged at the lower layer air exhaust main pipe, and the lower layer air exhaust system can be independently closed when the lower layer air exhaust main pipe is closed.

In the structure, the lower-layer intelligent injector is used for flushing the lower layer of the regulation pool after the regulation pool is emptied; the lower exhaust main pipe is used for collecting odor in the upper tank body; a ventilation channel is arranged at the middle layer plate and is directly connected with the ground for ventilation of the lower layer; the lower floor's lateral wall is equipped with overhauls the staircase for regulation pond lower floor overhauls and the connection of upper strata and lower floor under special circumstances.

As a most preferable technical scheme of the invention, the upper layer exhaust main pipe and the lower layer exhaust main pipe are both connected with an exhaust main pipe.

The most preferred technical scheme of the invention also comprises an ion deodorization device connected with the exhaust main pipe.

As a preferable technical scheme of the invention, the side wall of the sewage storage tank is provided with a maintenance staircase for maintenance of the lower layer of the storage tank and connection of the upper layer and the lower layer.

As a preferred technical solution of the present invention, the upper-layer sump and the lower-layer sump are respectively connected to the upper-layer water outlet header pipe and the lower-layer water outlet header pipe through a drain pump.

A drainage pump is arranged for conveying the rainwater to an external sewage pipe;

as a preferable technical scheme of the invention, the top parts of the rainwater storage tank and the sewage storage tank are respectively provided with an upper-layer vent and a lower-layer vent.

Compared with the prior art, the invention has the following advantages and beneficial effects:

(1) the land occupation utilization rate is high. Compared with the traditional regulation and storage tank, the invention adopts a unilateral arc irregular structure, can better fit the characteristic of irregular greenbelts in a high-density built area, fully utilizes the occupied area, increases the volume of the regulation and storage tank and exerts the regulation and storage effect to the maximum extent. Meanwhile, the double-layer structure can ensure that the volume of the regulation and storage tank is increased by nearly 1 time as a whole under the condition that the regulation and storage effective depth of each layer is unchanged in the same floor area.

(2) The utilization rate of the pool body is high. Compared with the traditional rainwater and sewage mixed storage tank, the rainwater and sewage mixed storage tank can reduce the burial depth of the storage tank by about 1 time of the effective water depth under the same scale and occupied area conditions, fully utilizes the elevation characteristics of shallow rainwater inlet pipes and deep sewage inlet pipes, and converts the original single-factor control condition that all water is controlled by the sewage pipe elevation into the double-factor control condition that half water is controlled by the rainwater pipe elevation and half water is controlled by the sewage pipe through a double-layer structure, fully utilizes the underground vertical space, effectively reduces the total burial depth of the storage tank, and reduces the construction investment and the construction difficulty of the storage tank.

(3) The use times and the guarantee rate are high. Bilayer structure can effectively independently open rainwater regulation system and sewage regulation system from top to bottom, and two systems independent operation each other, sewage system can adjust as reserve rainwater system under the special circumstances. The operation characteristics of multi-mode can effectively solve two kinds of regulation modes and receive the problem that both sides' empty pond condition caused the regulation number of times of regulation pond to reduce to the use restriction of traditional rain sewage mixed regulation pond has been broken through.

(4) The energy consumption is low. The rainwater layer and the sewage layer are separated through the double-layer structure, on one hand, rainwater with shallow water inflow is regulated and stored in the upper layer with shallow depth, so that the lift of a rainwater layer water outlet pump can be effectively reduced, and the depth of the sewage layer can be reduced, so that the lift of the sewage layer water outlet pump is reduced; on the other hand, each layer is relatively independent, and links such as washing, ventilation and deodorization can also be independently operated according to respective working conditions of each layer, so that the problem of energy consumption waste caused by single operation mode of the storage tank is greatly reduced.

(5) The structure is stable. Compared with the traditional single-layer rainwater and sewage mixed storage tank, the single-layer rainwater and sewage mixed storage tank has smaller clearance height due to the double-layer structure, and the single-layer vertical span of the wall plate is reduced due to the arrangement of the middle floor plate, so that the internal force of the wall plate can be effectively reduced, and the thickness and the reinforcing bars of the wall plate and the bottom plate are reduced. In addition, the middle floor slab can be used as a support changing fulcrum of the enclosure structure, and the construction period is effectively shortened.

Drawings

Fig. 1 is a schematic plan structure view of an upper rainwater storage tank according to the present invention.

FIG. 2 is a schematic plan view of the middle plate according to the present invention.

Fig. 3 is a schematic plan view of the lower sewage storage tank according to the present invention.

Fig. 4 is a schematic sectional view along the direction a-a in fig. 2.

Fig. 5 is a schematic cross-sectional view taken along the direction B-B in fig. 2.

Fig. 6 is a schematic cross-sectional view taken along the direction C-C in fig. 2.

Reference numerals: 1-upper rainwater inlet pipe; 2-lower layer sewage inlet pipe; 3-upper intelligent ejector; 4-lower intelligent ejector; 5-upper layer water collecting pit; 6-lower layer sump; 7-overhauling the staircase; 8-upper layer exhaust pipe air valve; 9-lower layer exhaust pipe air valve; 10-a main exhaust duct; 11-an ion deodorizing means; 12-coarse grating; 13-a sand bailer; 14-upper vents; 15-lower vent; 16-lower layer water outlet main pipe; 17-upper layer water outlet main pipe; 18-manhole; 19-fine grating; 20-medium layer plate.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

As shown in fig. 1 to 6, the highly integrated multifunctional double-layer regulation and storage tank suitable for high-density built-up areas comprises an upper-layer rainwater regulation and storage tank, a middle-layer plate 20 and a lower-layer sewage regulation and storage tank, and is characterized in that the tank has a double-layer structure, each layer can independently operate according to actual operation conditions, combination use under different conditions such as daily days in sunny days, early rainfall, peak sewage periods and valley sewage periods is met, and the two layers can be communicated to use under necessary conditions. The storage tank is positioned in the green space of the current park, adopts a unilateral arc irregular shape, and better fits the property of the irregular green space of the high-density built area.

The upper rainwater regulation and storage tank mainly operates independently according to the working conditions of sunny days and rainy days, is not influenced by the sewage peak period and the sewage valley period, and has the following specific implementation modes:

1. daily in sunny days: in a specific embodiment, the upper layer of the regulation and storage tank does not work in fine days, an electric gate leading to the regulation and storage tank in a water inlet well outside the regulation and storage tank is closed, an electric gate leading to a downstream sewage pipe is opened, and sewage directly enters a DN2000 water inlet pipe of a sewage treatment plant through a river-following sewage intercepting pipe.

2. In the early stage of rainfall: in the concrete all implementation modes, when the rainfall reaches the design value in the initial stage of raining, the upper layer of the regulation and storage pool starts to collect water, an electric gate leading to the regulation and storage pool in a regulation and storage pool water inlet well is opened, an electric gate leading to a downstream sewage pipe is closed, initial rainwater enters the regulation and storage pool through an upper layer water inlet pipe 1, a water inlet coarse grating 12 and a horizontal self-cleaning fine grating 19 start to operate, and rainwater and sewage combined flow in a river intercepting pipe respectively enters the regulation and storage pool through the links of the coarse grating 12, a sand bailing device 13 and the fine grating 19 for regulation and storage.

3. In the middle and later period of rainy days: in the specific implementation mode, when the upper water level of the regulation and storage tank reaches the design water level in the middle and later periods of raining, the electric gate leading to the regulation and storage tank in the regulation and storage tank water inlet well is closed, the water inlet coarse grating 12 and the horizontal self-cleaning fine grating 19 stop running, the weir gate leading to the river channel of the external inspection well of the regulation and storage tank is completely opened, and a large amount of rain and sewage combined water in the river intercepting pipe overflows to the river channel through the downward opening weir gates.

4. End of rainy day-emptying of the storage tank: in a specific embodiment, after raining is finished, an upper drainage pump of the regulation and storage tank is started, upper rainwater and sewage mixed water is pumped into a current sewage well through the drainage pump and an upper drainage header pipe 16 and enters a water inlet main pipe of a sewage plant, after the upper sewage is completely pumped out (through induction of a liquid level meter), the pump is stopped, and the regulation and storage tank finishes a sewage emptying link.

5. Cleaning the upper layer: in particular embodiment, regulation pond water storage and drainage process need regularly wash the regulation pond and prevent the regulation pond siltation, need open four upper strata intelligence sprayer 3 when regulation pond washs and wash the regulation pond, open the drain pump simultaneously (the workstation is counted according to washing the condition and is decided), will wash waste water discharge to sewage plant inlet tube, close upper strata intelligence sprayer 3 and drain pump respectively after the regulation pond washing finishes.

6. Daily operation and maintenance of the regulation and storage tank: regular deodorization and ventilation are required to be carried out every 4h in the daily operation process (including a water inlet link, a water storage link, a water drainage link and a cleaning link) of the upper layer of the regulation and storage tank, the air valve 9 of the exhaust pipe at the lower layer can be closed at the moment, the air valve 8 of the exhaust pipe at the upper layer is opened, and the regulation and storage tank is subjected to intermittent deodorization and ventilation by utilizing the exhaust main pipe 10, the ion deodorization device 11 and the vent 14 at the upper layer. Need to lift by crane sand bailing ware 13 simultaneously and clear up to the equipment room, will carry out periodic maintenance work after the evacuation of regulation pond upper strata, need to take a breath repeatedly with the fan in the regulation pond before the maintenance, accessible maintenance stairwell 7 to regulation pond upper strata during the maintenance, open access hole 18 and overhaul, or can go out the deodorization room and reserve access way and get into the regulation pond upper strata and overhaul.

7. The special working condition is as follows: generally, except for the maintenance link, the access hole 18 in the regulation pool should be in a normally closed state, but under some special extreme conditions, when the water storage on the upper layer of the regulation pool is difficult to be discharged through the upper drainage pump, the access hole 18 can be opened on the premise of ensuring safety, and the water storage on the overground layer of the regulation pool is discharged to the lower layer of the regulation pool through the access hole 18 and the maintenance stairway 7.

The lower layer sewage regulation and storage tank mainly operates independently according to the working conditions of the sewage peak period and the sewage valley period, is not influenced by sunny days and rainy days, and has the following specific implementation mode:

1. lifting the pump station mode: in the specific implementation mode, under the daily condition, the lower layer of the regulation and storage tank mainly serves as a three-stage factory-premise pumping station of a sewage treatment plant, sewage is controlled by a flow limiting valve in a sewage inlet well of the regulation and storage tank and a flow limiting valve in a current grid well, and 5 ten thousand meters of sewage is discharged³The sewage of/d is distributed to the lower layer of the regulation and storage tank by the sewage inlet pipe 2 of the lower layer, other residual sewage enters the first stage of the sewage plant through the water inlet pipe of the original sewage plant, and the sewage distributed to the regulation and storage tank is lifted to the water outlet main pipe 17 of the outer lower layer of the regulation and storage tank through the drainage pump of the lower layer of the regulation and storage tank and is connected with the three-stage water inlet pressure pipe of the sewage plant. The working condition is a perennial operation working condition except for maintenance of the storage tank and a sewage peak period.

2. Sewage regulation mode: in the concrete implementation mode, the sewage peak period, on the basis of daily working conditions, when the first-stage treatment load of the sewage plant is larger, the opening degree of the regulating and storage tank inlet flow limiting valve is increased simultaneously by reducing the opening degree of the flow limiting valve in the current grid well, the sewage which is difficult to treat in the first stage of the sewage plant is distributed to the lower layer of the regulating and storage tank, the sewage distributed to the regulating and storage tank is lifted to the lower layer water outlet header pipe 17 outside the regulating and storage tank through the sewage drainage pump on the lower layer of the regulating and storage tank, and the sewage is connected with the third-stage water inlet pressure pipe of the British sewage plant. Under the working condition, the number of the operating sewage lifting pumps can be determined by combining the actual treatment condition of the sewage plant in the third period, and the storage tank is used as an important means for the pre-treatment storage of the sewage plant in the third period, so that the water impact load is reduced, and the first-second-third-period treatment effect of the sewage plant in the sewage peak period is ensured.

3. Cleaning a storage regulation tank: in sewage valley period (total sewage volume is less than sewage plant primary treatment ability), can regularly wash the regulation pond lower floor and prevent the regulation pond siltation, the sewage inlet tube of lower floor needs to be closed this moment, open four lower floor's intelligent sprayer 4 and wash the regulation pond after waiting the regulation pond evacuation, open the displacement pump simultaneously (the workstation number is decided according to the washing condition), discharge waste water to the sewage plant tertiary inlet tube, lower floor's intelligent sprayer 4 and drain pump are closed respectively to the regulation pond washing after finishing, open the import restriction valve simultaneously, make the regulation pond trun into daily promotion pump station operating mode.

4. Daily operation and maintenance of the regulation and storage tank: the lower layer of the regulation pool needs to perform timed deodorization and ventilation every 4 hours in the daily operation process (including a water inlet link, a water storage link, a water drainage link and a cleaning link), at the moment, an upper layer exhaust pipe air valve 8 can be closed, an upper layer exhaust pipe air valve 9 is opened, and the regulation pool is subjected to intermittent deodorization and ventilation by utilizing an exhaust main pipe 10, an ion deodorization device 11 and a lower layer ventilation opening 15; regular maintenance work need be carried out to regulation pond lower floor, need close lower floor's sewage inlet tube 2 before overhauing, will regulate pond lower floor's water evacuation, take a breath repeatedly with the fan to gas in the regulation pond, and accessible overhauls staircase 7 during the maintenance and directly gets into regulation pond lower floor and overhauls.

The upper effective water depth of the invention is calculated downwards by taking the bottom elevation of the rainwater inlet pipe as a reference; the effective water depth of the lower layer is calculated downwards by taking the height of the sewage inlet pipe as a reference.

The upper layer water pump lift of the invention calculates the gravity head by taking the height difference between the middle plate and the ground as the basis; and the lower-layer water pump lift calculates the gravity head by taking the height difference between the bottom plate and the ground as a basis.

According to the description of the present invention and the accompanying drawings, those skilled in the art can easily manufacture or use the multifunctional double-layer storage tank suitable for high-density built-up areas of the present invention and can produce the positive effects described in the present invention.

Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.

Claims (8)

1. The utility model provides a multi-functional double-deck regulation pond suitable for high-density built-up area which characterized in that: the regulation pond includes that the setting is rainwater regulation pond and the sewage regulation pond that distributes from top to bottom through the well plywood partition, the end of intaking in rainwater regulation pond has connected gradually upper rainwater inlet tube, thick grid, has dragged for husky ware, thin grid and upper sump pit, the end of intaking in sewage regulation pond has connected gradually lower floor's sewage inlet tube and lower floor's sump pit, rainwater regulation pond and sewage regulation pond communicate through setting up the access hole on rainwater regulation pond lateral wall.

2. The multifunctional double-layer storage tank suitable for high-density built-up areas according to claim 1, wherein: the rainwater storage tank also comprises an upper-layer intelligent ejector arranged in the middle and an upper-layer exhaust main pipe arranged at the top; an upper layer exhaust pipe air valve is arranged at the upper layer exhaust main pipe, and an upper layer exhaust system can be independently closed when the upper layer exhaust pipe air valve is closed.

3. The multifunctional double-layer storage tank suitable for high-density built-up areas according to claim 1 or 2, characterized in that: the sewage storage tank also comprises a lower-layer intelligent ejector arranged in the middle and a lower-layer exhaust main pipe arranged at the top; the lower layer air exhaust pipe air valve is arranged at the lower layer air exhaust main pipe, and the lower layer air exhaust system can be independently closed when the lower layer air exhaust main pipe is closed.

4. The multifunctional double-layer storage tank suitable for high-density built-up areas according to claim 2, characterized in that: the upper layer air exhaust main pipe and the lower layer air exhaust main pipe are both connected with an air exhaust main pipe.

5. The multifunctional double-layer storage tank suitable for high-density built-up areas according to claim 4, wherein: and the ion deodorization device is connected with the exhaust main pipe.

6. The multifunctional double-layer storage tank suitable for high-density built-up areas according to claim 1, wherein: the lateral wall of sewage regulation pond is equipped with overhauls the staircase for regulation pond lower floor overhauls and the connection of upper strata and lower floor.

7. The multifunctional double-layer storage tank suitable for high-density built-up areas according to claim 1, wherein: the upper layer water collecting pit and the lower layer water collecting pit are respectively connected with the upper layer water outlet main pipe and the lower layer water outlet main pipe through a drainage pump.

8. The multifunctional double-layer storage tank suitable for high-density built-up areas according to claim 1, wherein: the top in rainwater regulation pond and sewage regulation pond is provided with upper vent and lower floor's vent respectively.

Images