CN214270489U - Underground wastewater discharge device - Google Patents

Abstract

The utility model provides an underground wastewater discharge device, which solves the problem of pipeline blockage in the process of treating underground water by utilizing aeration, has high underground water treatment efficiency and good purification effect, and comprises an underground pipe device, an aeration device, a wastewater pretreatment device and a secondary waste extraction device, wherein the underground pipe device comprises a hollow pipe body, a sieve plate and a partition plate, the aeration device comprises an aeration pipe and a gas supply machine, the wastewater pretreatment device comprises an atomization pipe, a water pumping pipe and a purification box, the secondary waste extraction device comprises a slag suction pipe and a collection box, a centrifugal box is arranged in the purification box, the centrifugal box comprises an inner centrifugal box and an outer centrifugal box, the bottom of the inner centrifugal box is connected with a rotating motor, the water pumping pipe penetrates through the top wall of the inner centrifugal box, the atomization pipe penetrates through the first side wall of the purification box, a water filtering plate is arranged between the first side wall of the purification box and the side wall of the outer centrifugal box, two ends of the water filtering plate are provided with sliding supports, the drainage board is equipped with the filtration pore, and the lateral wall upper end of outer centrifuge box all is equipped with the spout with smooth support looks adaptation with the first lateral wall of purifying box.

Description

Underground wastewater discharge device

Technical Field

The utility model relates to a municipal administration environmental protection technical field, concretely relates to underground wastewater discharging equipment.

Background

Groundwater is an important component of water resources and plays a significant role in the development of the human society. In recent 20 years, due to unreasonable treatment of municipal solid waste, industrial three wastes and the like, pesticides in agricultural production are used. The great use of chemical fertilizers causes the pollution of groundwater in China to become serious.

Most of underground water pollution sites are in a complex and mixed pollution state, and the characteristics of concealment, delay and difficult reversion cause long repair period, high cost and great difficulty of underground water pollution. The developed countries begin the research on the remediation of organic pollution of underground water in the 80 th century, and make important progress, while the research on the pollution of underground water and the remediation engineering in China just start. At present, the treatment technology for organic pollution of underground water at home and abroad mainly comprises: pump-treat technology (pump-treat), hydraulic isolation technology, aeration technology (AS), bioremediation technology, permeable reactive barrier technology, monitoring natural attenuation method, etc. The pumping-treatment technology is relatively mature, the cost is lower than that of other methods, the repair period is short, and the method is widely adopted for removing and controlling the organic pollution of underground water.

The method for removing impurities from pumped underground water through aeration treatment is one of methods for treating underground water in the prior art, for example, a Chinese patent with the publication number of CN201821673166.X discloses a high-concentration organic matter polluted underground water pumping treatment system, which utilizes solar clean energy to heat air for blowing and stripping, increases the blowing and stripping efficiency and reduces the engineering cost; the vaporous remediation agent is contacted and mixed with the water drop-shaped polluted water, so that the mixing is more uniform, but when underground water is pumped out, the sewage needs to be atomized and then is in contact reaction with aeration gas, so that the blockage of an atomization pipe is often caused, and the underground water treatment effect is influenced.

Disclosure of Invention

In order to solve the problems, the utility model provides an underground wastewater discharge device, which solves the problem of pipeline blockage in the process of utilizing aeration to treat underground water, and has high underground water treatment efficiency and good purification effect.

The utility model provides a technical proposal for solving the problem, which is an underground wastewater discharge device, comprising an underground pipe device, an aeration device, a wastewater pretreatment device and a secondary waste extraction device, wherein the underground pipe device comprises a hollow pipe body, a sieve plate and a separation plate, the aeration device comprises an aeration pipe which runs through the sieve plate and the top wall of the hollow pipe body and a gas supply machine which is used for leading gas into the aeration pipe, the wastewater pretreatment device comprises an atomization pipe which runs through the top wall of the hollow pipe body, a water pumping pipe which runs through the sieve plate, the separation plate and the top wall of the hollow pipe body and a purification box which is connected with the water pumping pipe and the atomization pipe, the secondary waste extraction device comprises a slag suction pipe which runs through the sieve plate and the top wall of the hollow pipe body, a power pump and a collection box which are connected with the slag suction pipe, a centrifugal box is arranged in the purification box, the centrifugal box comprises an inner centrifugal box and an outer centrifugal box, the utility model discloses a purification box, including interior centrifugal box, inner centrifuge box bottom, drinking-water pipe, atomizing pipe, purifying box, outer centrifuge box lateral wall, inner centrifuge box bottom is connected with the rotating electrical machines, the drinking-water pipe runs through the roof of interior centrifugal box, the atomizing pipe runs through the first lateral wall of purifying box, the first lateral wall of purifying box with be equipped with the water strainer plate between the outer centrifuge box lateral wall, the water strainer plate both ends are equipped with smooth the support, the water strainer plate is equipped with the filtration pore, the lateral wall upper end of outer centrifuge box all be equipped with the first lateral wall of purifying box slide the spout that holds in the palm looks adaptation.

Preferably, the side wall of the inner centrifugal box is provided with a centrifugal through hole, the lower end of the side wall of the outer centrifugal box is provided with a drainage through hole, and an accommodating space for purified water to flow is arranged between the inner centrifugal box and the outer centrifugal box.

Preferably, the first side wall of the purification box and the side wall of the outer centrifugal box are fixedly connected with limit pieces for stopping the water filtering plates.

Preferably, the first lateral wall of purifying box is equipped with first, outer centrifuge box lateral wall all is equipped with the second jack, rotatory brush include rotation axis and rigid coupling in the brush head of rotation axis periphery, the rotation axis is inserted and is located between first jack and the second jack, the rotation axis is connected with the motor electricity, be equipped with the silica gel gasket between the first lateral wall of motor and purifying box.

Preferably, the inner centrifugal box top wall is connected with a sludge pumping pipe, the sludge pumping pipe is connected with a sludge box, and the sludge box is connected with an air pump.

Preferably, a pressure valve and a mud guide pipe communicated with the pressure valve are arranged on the second side wall of the purification box, one end of the mud guide pipe penetrates through the second side wall of the purification box, and the other end of the mud guide pipe penetrates through one side wall of the sludge box.

Preferably, the locating part is a pressure sensor, an electric telescopic rod is arranged at the upper end of the water filtering plate and penetrates through the top wall of the purifying box, the electric telescopic rod and the pressure sensor are connected with a power supply in parallel, and a PLC (programmable logic controller) is arranged between the pressure sensor and the power supply.

Preferably, the top wall of the hollow pipe body is provided with an aeration vent hole.

Preferably, the division board is the solid board, the sieve is equipped with the sieve mesh, the sieve is located the division board top.

Preferably, the side wall of the hollow pipe body is provided with a water immersion hole, and the water immersion hole is arranged between the isolation plate and the sieve plate.

In the scheme, the process of underground water treatment comprises the following steps: the method comprises inserting a hollow pipe body into the ground until the hollow pipe body contacts with underground water, separating the hollow pipe body by a separation plate, dividing the separation plate into an aeration zone above the separation plate and a water pumping zone below the separation plate, pumping underground sewage out through a water pumping pipe extending into the water pumping zone, and conveying the sewage into an inner centrifugal box of a purification box through a pipeline, wherein the purification box is divided into a centrifugal zone and a water purification zone by an outer centrifugal box, the inner part of the outer centrifugal box is a centrifugal zone, the space between the outer centrifugal box and the inner wall of the purification box is a water purification zone, a rotating motor is connected with the bottom of the inner centrifugal box through a shaft and fixedly connected with the outer centrifugal box through the outer wall of the rotating motor, the rotating motor is started, the inner centrifugal box is driven to rotate, the outer centrifugal box keeps unchanged in position, due to the centrifugal through holes arranged on the side wall of the inner centrifugal box, when the inner centrifugal box rotates, impurities containing large particles in the sewage are intercepted into the inner centrifugal box, and partially subside at the bottom of the inner centrifugal box together with small particles, such as silt and the like the centrifugal force, the sludge or impurities at the bottom of the centrifugal box are pumped into the sludge box through a sludge pumping pipe, the underground sewage primarily treated by the inner centrifugal box enters the accommodating space between the inner centrifugal box and the outer centrifugal box through the centrifugal through holes and flows into the water purification area through the drainage through holes at the lower end of the outer centrifugal box, the underground sewage primarily treated is continuously discharged into the water purification area until contacting with the water filter plate provided with filter holes, the filter holes can be selected to be in a micron level according to actual requirements, the underground sewage primarily treated is filtered through the filter holes of the water filter plate, the water level continues to rise, the position above the water filter plate is purified water, the position below the water filter plate is intercepted water, the impurities in the intercepted water are the impurities in the concentrated primarily treated underground sewage, the impurity particles are further reduced and reduced relative to the impurity particles in the inner centrifugal box and settle at the bottom of the purification box under the action of gravity, when the purified water is required to be pumped and removed, when the bottom of the purifying tank bears certain impurities or the pressure of the water filtering plate rises after the filtering holes are blocked, the pressure valve is opened or manually opened through a common valve, the impurities at the bottom of the purifying tank are guided into the sludge tank, the purified water is atomized and sprayed into an aeration area in the centrifuge tube through the atomizing pipe and is subjected to aeration treatment through the gas released by the aeration pipe connected with the gas supply machine, and pollutants dissolved in the water are removed, the atomizing pipe can be externally connected with the pressure pump in the scheme, so that the atomization efficiency of the purified water is improved, the purified water is subjected to aeration reaction, reaction products such as flocculation substances or other particle impurities contained in the reaction products are settled on the partition plate and are guided into the collecting tank through the slag suction pipe for concentrated treatment, and the treated purified water flows back into a shallow stratum through the soaking holes formed in the pipe wall of the hollow pipe body, the underground sewage is treated by the purifying box, impurities which are insoluble in water in the underground sewage are removed, the underground water in the atomizing pipe contains less impurities and cannot block the pipe hole of the atomizing pipe, the problems of cleaning, sewage backflow and low sewage purification degree are avoided, the aeration efficiency is improved due to atomization, the impurities which are soluble in the underground water are effectively removed, and finally the treated purified water flows back to a shallow stratum through the soaking hole formed in the pipe wall of the hollow pipe body so as to achieve the project of soil and underground water restoration.

In addition, this scheme can also wash the purifying box that blocks up because impurity is too many, and specific process is as follows: when the pressure sensor senses that the pressure exceeds a set range, or the water yield of the atomizing pipe is reduced by naked eyes, or the pressure valve is in a state of being continuously opened, the blockage of the water filtering plate is considered to be cleaned in time, in the scheme, the set threshold value of the pressure valve is far higher than the alarm threshold value of the pressure sensor, when the water filtering plate is blocked, the water pumping action of the water pumping pipe is stopped, when the water filtering plate is blocked, the pressure sensed by the pressure sensor is increased, the sensed pressure is transmitted to the PLC and converted into a digital signal, whether a power supply connected with the electric telescopic rod needs to be started or not is judged by setting the digital signal sensed by the PLC, when the pressure is increased to a certain value, the power supply is started, the electric telescopic rod starts to move downwards to continuously push the blocked water filtering plate to move downwards, the scheme can be changed into the scheme that the water filtering plate is pushed to move downwards by artificially applying pressure such as increasing a gravity block and the like without the electric device, the pressure in the water purification area is increased, the intercepted water in the water purification area flows back to the accommodating space between the outer centrifugal box and the inner centrifugal box through the drainage through hole due to the pressure increase, the inner wall of the inner centrifugal box and the inner wall of the outer centrifugal box cause the blockage phenomenon that the centrifugal through hole is close to the inner wall of the inner centrifugal box and the drainage passes through one side close to the inner wall of the outer centrifugal box due to the long-term contact with silt or impurities, but through the process, the intercepted water can flow back to the inner centrifugal box through the centrifugal through hole, the underground sewage in the inner centrifugal box is diluted, the dirt attached to the drainage through hole and the centrifugal through hole is dispersed, the inner centrifugal box is back-cleaned, the water filter plate is cleaned until the water filter plate contacts with the brush head of the rotary brush, the motor with the limited amount of the rotary shaft is started to clean the filter hole of the water filter plate, the cleaning of the water filter plate is completed, meanwhile, the rotary motor connected with the bottom of the inner centrifugal box and the air pump connected with the silt pumping pipe are started, the silt of interior centrifugal box is led into to the silt incasement through taking out the silt pipe, further vacate the space that holds the interception water for interior centrifugal box, increase the solubility to impurity and break up the dirt that originally adheres to on drainage through-hole and centrifugal through-hole through interception water and the underground sewage that dilutes, and then carry out the backwashing to interior centrifugal box, play and alleviate the problem that interior centrifugal box and outer centrifugal box hole wall blockked up, when overflow appears in interior centrifugal box or the silt pipe that takes out is rare silt, then consider the centrifugal through-hole of interior centrifugal box and block up, can artificially open electric telescopic handle's power and wash with above-mentioned samely method, when drainage plate and interior centrifugal box, outer centrifugal box wash and finish, release the drainage plate, and open the work of drawing water pipe, carry out the underground sewage treatment step of new round.

The invention has the beneficial effects that:

1. because the underground sewage is treated by the purifying box, impurities which are insoluble in water in the underground sewage are removed, the underground water in the atomizing pipe contains less impurities and cannot block the pipe hole of the atomizing pipe, the problems of dismantling and cleaning, sewage backflow and low sewage purification degree are solved, the contact area of gas used for aeration and the underground water is increased due to atomization, the aeration efficiency is improved, the impurities which are soluble in the underground water are effectively removed, and finally the treated purified water flows back to a shallow stratum through the water soaking holes arranged on the pipe wall of the hollow pipe body so as to achieve the project of soil and underground water re-breeding;

2. when the inner centrifugal box or the water filtering plate is blocked, a downward external force is applied to the water filtering plate, so that the rotary brush can brush the water filtering plate, and in the downward movement process of the water filtering plate, the intercepted water flows back into the inner centrifugal box due to pressure, and the inner centrifugal box can be cleaned while the water filtering plate is cleaned, so that the two purposes are achieved, compared with the method for directly cleaning the underground atomizing pipe, the method is more convenient and automatic, and the blocking condition can be observed at any time;

3. volatile organic compounds dissolved in water are aerated by utilizing aeration treatment, and the arrangement of the sieve plate and the atomizing pipe is increased, so that the contact area and the contact time of aeration gas and purified water are increased, and the aeration treatment efficiency is further improved;

drawings

FIG. 1 is a schematic structural view of an underground wastewater discharge device in the present embodiment;

FIG. 2 is a schematic structural diagram of the purification box in the present embodiment;

in the figure: 1. an underground pipe arrangement; 2. an aeration device; 3. a wastewater pretreatment device; 4. a secondary waste extraction device; 11. a hollow tube body; 12. a sieve plate; 13. a separator plate; 21. an aeration pipe; 22. a gas supply machine; 23. an atomizing tube; 24. a water pumping pipe; 5. a purification box; 41. a slag suction pipe; 42. a collection box; 51. a centrifuge box; 52. an inner centrifuge box; 53. an outer centrifuge box; 54. a rotating electric machine; 55. a first side wall; 56. a water filter plate; 561. sliding and supporting; 562. filtering holes; 563. a chute; 521. a centrifugal through hole; 531. a drain through hole; 6. a limiting member; 551. a first jack; 552. a second jack; 553. rotating the brush; 557. a motor; 558. a silica gel gasket; 7. pumping sludge pipes; 71. a sludge tank; 72. a second side wall; 73. a pressure valve; 74. a mud guide pipe; 8. an electric telescopic rod; 9. a power source; 91. a PLC controller; 92. an aeration vent hole; 93. screening holes; 94. and (4) soaking holes.

Detailed Description

In order to facilitate the understanding of the present invention, the technical solutions of the present invention are further described below with reference to the specific embodiments, but the present invention is not limited thereto, and it should be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defined as "first", "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

An underground wastewater discharge device comprises an underground pipe device 1, an aeration device 2, a wastewater pretreatment device 3 and a secondary waste pumping device 4, wherein the underground pipe device 1 comprises a hollow pipe body 11, a sieve plate 12 and a partition plate 13, the aeration device 2 comprises an aeration pipe 21 penetrating through the top walls of the sieve plate 12 and the hollow pipe body 11 and a gas supply machine 22 used for leading gas into the aeration pipe 21, the wastewater pretreatment device 3 comprises an atomization pipe 23 penetrating through the top wall of the hollow pipe body 11, a water pumping pipe 24 penetrating through the top walls of the sieve plate 12, the partition plate 13 and the hollow pipe body 11 and a purification box 5 connected with the water pumping pipe 24 and the atomization pipe 23, the secondary waste pumping device 4 comprises a slag suction pipe 41 penetrating through the top walls of the sieve plate 12 and the hollow pipe body 11, a power pump connected with the slag suction pipe 41 and a collection box 42, all pipelines in the scheme all comprise power pumps connected with the pipelines, so as to provide corresponding pumping and suction power, a centrifugal box 51 is arranged in the purification box 5, the centrifugal box 51 comprises an inner centrifugal box 52 and an outer centrifugal box 53, the bottom of the inner centrifugal box 52 is connected with a rotating motor 54, the rotating motor 54 is connected with the bottom of the inner centrifugal box 52 through a shaft, and is fixedly connected with the outer centrifugal box 53 through the outer wall of the rotating motor 54, the rotating motor 54 is started, the inner centrifugal box 52 is driven to rotate, the outer centrifugal box 53 keeps unchanged in position, the model of the rotating motor 54 can be 6IK300RGU-CF +6GU-300K, the water pumping pipe 24 penetrates through the top wall of the inner centrifugal box 52, the atomizing pipe 23 penetrates through the first side wall 55 of the purification box 5, a water filtering plate 56 is arranged between the first side wall 55 of the purification box 5 and the outer centrifugal box 53, two ends of the water filtering plate 56 are provided with sliding supports 561, the water filtering plate 56 is provided with filtering holes 562, the upper end of the side wall of the outer centrifugal box 53 and the first side wall 55 of the purification box 5 are provided with sliding supports 561 The matching of the matched sliding groove 563, the sliding groove 563 and the sliding support 561 enables the water filtering plate 56 to slide up and down between the wall of the outer centrifugal box 53 and the wall of the purifying box 5.

The side wall of the inner centrifugal box 52 is provided with a centrifugal through hole 521, the lower end of the side wall of the outer centrifugal box 53 is provided with a drainage through hole 531, an accommodating space for purified water to flow is arranged between the inner centrifugal box 52 and the outer centrifugal box 53, and the apertures of the centrifugal through hole 521 and the drainage through hole 531 are enough to intercept large water-insoluble impurities or sludge in underground sewage.

The first side wall 55 of the purification box 5 and the side wall of the outer centrifugal box 53 are fixedly connected with a limiting piece 6 for stopping the water filtering plate 56, the water filtering plate 56 is provided with a filtering hole 562, and the limiting piece 6 limits the water filtering plate 56 to move upwards continuously, so that the water filtering effect is realized.

In order to brush the water filtering plate 56, the first sidewall 55 of the purifying box 5 is provided with a first sidewall, the outer centrifugal box 53 is provided with a second insertion hole 552 on the sidewall, the rotating brush 553 comprises a rotating shaft and a brush head fixedly connected to the periphery of the rotating shaft, the rotating shaft is inserted between the first insertion hole 551 and the second insertion hole 552, the rotating shaft is electrically connected with the motor 557, a silica gel gasket 558 is arranged between the motor 557 and the first sidewall 55 of the purifying box 5, and the silica gel gasket 558 is fixedly arranged on the first sidewall 55 of the purifying box 5 to prevent the overflow of the intercepted water in the purifying region.

The top wall of the inner centrifugal box 52 is connected with a sludge pumping pipe 7, the sludge pumping pipe 7 is connected with a sludge box 71, and the sludge box 71 is connected with an air pump for pumping out sludge in the inner centrifugal box 52 and keeping the inner centrifugal box 52 to have enough space for primary treatment of underground water.

The second side wall 72 of the purification box 5 is provided with a pressure valve 73 and a mud guide pipe 74 communicated with the pressure valve 73, one end of the mud guide pipe 74 penetrates through the second side wall 72 of the purification box 5, and the other end penetrates through one side wall of the mud box 71, although the impurities in the water purification area are less in the scheme, the impurities in the purification box 5 are prevented from increasing after being accumulated for a long time, therefore, the mud guide pipe 74 communicated with the pressure valve 73 is arranged to dredge the interior of the purification box 5, and the pressure threshold value of the pressure valve 73 can be determined according to actual conditions and can be replaced by a common valve.

The locating part 6 is pressure sensor, the water strainer 56 upper end is equipped with electric telescopic handle 8, electric telescopic handle 8 runs through 5 roof of purifying box, electric telescopic handle 8 and pressure sensor are parallelly connected with power 9, be equipped with PLC controller 91 between pressure sensor and the power 9.

The top wall of the hollow pipe body 11 is provided with an aeration exhaust hole 92 for exhausting the gas after aeration treatment.

The division board 13 is the solid plate to divide hollow pipeline into pumping area and aeration zone, sieve 12 is equipped with sieve mesh 93, sieve 12 locates the division board 13 top has increased the area of contact and time length of aeration gas with the purified water, and then has promoted aeration treatment efficiency.

The side wall of the hollow pipe body 11 is provided with water immersion holes 94, the water immersion holes 94 are arranged between the isolation plate 13 and the sieve plate 12, and the treated purified water flows back to the shallow stratum through the water immersion holes 94 arranged on the pipe wall of the hollow pipe body 11 so as to achieve the project of soil and underground water restoration and carry out secondary utilization on underground sewage.

Specific embodiments of the present invention have been described above in detail.

It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, any technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments in the prior art based on the inventive concept should be within the scope of protection defined by the claims.

Claims (10)

1. The underground wastewater discharge device is characterized by comprising an underground pipe device (1), an aeration device (2), a wastewater pretreatment device (3) and a secondary waste extraction device (4), wherein the underground pipe device (1) comprises a hollow pipe body (11), a sieve plate (12) and a partition plate (13), the aeration device (2) comprises an aeration pipe (21) penetrating through the sieve plate (12) and the top wall of the hollow pipe body (11), a gas supply machine (22) used for introducing gas into the aeration pipe (21), the wastewater pretreatment device (3) comprises an atomization pipe (23) penetrating through the top wall of the hollow pipe body (11), a water pumping pipe (24) penetrating through the sieve plate (12), the partition plate (13) and the top wall of the hollow pipe body (11) and a purification box (5) connected with the water pumping pipe (24) and the atomization pipe (23), and the secondary waste extraction device (4) comprises a slag pumping pipe (24) penetrating through the top walls of the sieve plate (12) and the hollow pipe body (11) 41) A power pump and a collecting box (42) which are connected with the slag suction pipe (41), a centrifugal box (51) is arranged in the purifying box (5), the centrifugal box (51) comprises an inner centrifugal box (52) and an outer centrifugal box (53), the bottom of the inner centrifugal box (52) is connected with a rotating motor (54), the water pumping pipe (24) penetrates through the top wall of the inner centrifugal box (52), the atomization pipe (23) penetrates through a first side wall (55) of the purification box (5), a water filtering plate (56) is arranged between the first side wall (55) of the purifying box (5) and the side wall of the outer centrifugal box (53), both ends of the water filtering plate (56) are provided with sliding supports (561), the water filtering plate (56) is provided with filtering holes (562), the upper end of the side wall of the outer centrifugal box (53) and the first side wall (55) of the purifying box (5) are both provided with a sliding groove (563) matched with the sliding support (561).

2. An underground waste water drainage device according to claim 1, wherein the side wall of the inner centrifugal box (52) is provided with a centrifugal through hole (521), the lower end of the side wall of the outer centrifugal box (53) is provided with a drainage through hole (531), and an accommodating space is arranged between the inner centrifugal box (52) and the outer centrifugal box (53).

3. An underground waste water discharge device according to claim 1, wherein the first side wall (55) of the purification box (5) and the side wall of the outer centrifugal box (53) are each fixedly connected with a stopper (6) for stopping the water filter plate (56).

4. An underground wastewater discharge device according to claim 1, wherein a first side wall (55) of the purification box (5) is provided with a first jack (551), side walls of the outer centrifugal box (53) are provided with a second jack (552), a rotating brush (553) is arranged between the first jack (551) and the second jack (552), the rotating brush (553) comprises a rotating shaft and a brush head fixedly connected to the periphery of the rotating shaft, the rotating shaft is inserted between the first jack (551) and the second jack (552), the rotating shaft is electrically connected with a motor (557), and a silicone gasket (558) is arranged between the motor (557) and the first side wall (55) of the purification box (5).

5. An underground waste water drainage device according to claim 1, wherein a sludge suction pipe (7) is connected to the top wall of the inner centrifugal box (52), the sludge suction pipe (7) is connected to a sludge tank (71), and an air pump is connected to the sludge tank (71).

6. An underground waste water discharge apparatus according to claim 5, wherein the second side wall (72) of the purification tank (5) is provided with a pressure valve (73), a sludge guide pipe (74) communicating with the pressure valve (73), one end of the sludge guide pipe (74) penetrating the second side wall (72) of the purification tank (5) and the other end penetrating a side wall of the sludge tank (71).

7. An underground wastewater discharge device according to claim 3, wherein the position-limiting element (6) is a pressure sensor, an electric telescopic rod (8) is arranged at the upper end of the water filtering plate (56), the electric telescopic rod (8) penetrates through the top wall of the purification box (5), the electric telescopic rod (8) and the pressure sensor are connected in parallel with a power supply (9), and a PLC (programmable logic controller) 91 is arranged between the pressure sensor and the power supply (9).

8. An underground waste water discharge device according to claim 1, in which the top wall of the hollow tubular body (11) is provided with aeration vents (92).

9. An underground waste water discharge device according to claim 1, in which the dividing wall (13) is a solid plate, and the screening plate (12) is provided with screening holes (93), and the screening plate (12) is provided above the dividing wall (13).

10. An underground waste water discharge device according to claim 1, in which the side wall of the hollow pipe body (11) is provided with a soaking hole (94), and the soaking hole (94) is provided between the partition plate (13) and the sieve plate (12).

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