A construction site domestic sewage treatment system

Abstract

The present invention provides a domestic sewage treatment system for a construction site, which comprises a disinfection pool, a separation pool, a dephosphorization pool and a water purification pool connected in sequence. After being treated in the disinfection pool, the sewage is introduced into the separation pool to remove oil stains, and then introduced into the dephosphorization pool, and finally introduced into the water purification pool for storage; wherein a first motor is installed below the disinfection pool, and the rotating shaft of the first motor is fixedly connected to a stirring rod arranged in the disinfection pool, and the disinfection pool is also covered with a first cover plate, and a loading cylinder is placed on the first cover plate, which passes through the first cover plate and extends into the disinfection pool, the stirring rod comprises a hollow section and the loading cylinder extends into the hollow section, the loading cylinder is provided with a first connecting hole, and the hollow section is provided with a second connecting hole. The system provided by the present invention performs targeted treatment on various wastes in domestic sewage, and finally makes the treated water meet the discharge standard.

Description

Technical Field

[0001] The invention relates to the technical field of construction wastewater treatment equipment, and in particular to a construction site domestic sewage treatment system. Background Art

[0002] Construction sites generally have living areas, especially larger construction sites. The living areas generate a large amount of domestic sewage every day with many types. The sewage contains particulate impurities, food residues, oil pollution, and phosphorus-containing waste.

[0003] In the prior art, multiple treatment tanks are generally used to treat sewage at construction sites. For example, Chinese patent application CN109052701A discloses a construction site sewage treatment device, in which a sewage tank and a clean water tank are dug and built, and then a purification component is arranged between the two. Specifically, the treatment device includes a centrifugal system and a filtration system, the centrifugal system is connected to the sewage tank, the filtration system is connected to the clean water tank, and the centrifugal system and the filtration system are connected through a buffer tank; wherein the centrifugal system includes a pump and a centrifuge, and the pump is connected to the sewage tank through a pump pipe; the filtration system includes a filtration water inlet end and a filtration water outlet end, the water inlet of the filtration water inlet end is connected to the buffer tank, and the water outlet of the filtration water outlet end is connected to the clean water tank through a drain pipe; a reflux flushing device is arranged in the filtration system, and the reflux flushing device includes a valve and a reflux pipe, one end of the reflux pipe is arranged at a pre-filtration position in the filtration water inlet end, and the other end is connected to the sewage tank, and there are two valves, which are respectively arranged on the filtration water outlet end and the reflux pipe. The invention effectively solves the problems of difficult construction wastewater treatment, low water resource utilization, and direct wastewater discharge polluting the environment in traditional construction sites.

[0004] The device treats sewage through centrifugation and filtration, and is not suitable for more complex domestic sewage treatment. Specifically, the device is not effective in treating oil, phosphorus-containing waste, etc. in domestic sewage at construction sites. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a construction site domestic sewage treatment system, which solves the problem of poor treatment effect of oil pollution, phosphorus-containing wastes and the like in the construction site domestic sewage in the prior art.

[0006] According to an embodiment of the present invention, a domestic sewage treatment system is provided at a construction site, which comprises a disinfection pool, a separation pool, a phosphorus removal pool and a clean water pool connected in sequence. After being treated in the disinfection pool, the sewage is introduced into the separation pool to remove oil stains, and then introduced into the phosphorus removal pool, and finally introduced into the clean water pool for storage; wherein a first motor is installed below the disinfection pool, and the rotating shaft of the first motor is fixedly connected to a stirring rod arranged in the disinfection pool, and a first cover plate is also covered on the disinfection pool, and a loading cylinder is placed on the first cover plate, which passes through the first cover plate and extends into the disinfection pool, the stirring rod comprises a hollow section and the loading cylinder extends into the hollow section, a first connecting hole is arranged on the loading cylinder, and a second connecting hole is arranged in the hollow section.

[0007] In the above embodiment, the loading cylinder can be loaded with disinfectant. After the sewage is introduced into the disinfection pool, the disinfectant is added and the first motor is started to stir the sewage. The disinfectant can be dissolved more quickly with the stirring, thereby achieving efficient disinfection. The sewage after disinfection continues to undergo subsequent treatment and is finally stored in a clean water pool.

[0008] Furthermore, a support plate is fixedly connected to the upper end of the loading cylinder, a delivery port communicating with the loading cylinder is formed on the support plate, and a second cover plate is mounted on the delivery port.

[0009] Furthermore, a first filter box is also mounted on the bottom surface of the disinfection pool, a partition is fixedly connected to the first filter box and the first filter box is also filled with a filter medium located above the partition, a first pump body is arranged between the part of the first filter box located below the partition and the separation pool, a third connecting hole is arranged on the part of the first filter box located above the partition, and a fourth connecting hole is arranged on the partition.

[0010] Furthermore, the separation tank includes a closed outer shell and a rotating drum arranged in the outer shell, a second motor is installed under the outer shell and the rotating shaft of the second motor is fixedly connected to the rotating drum; a suction cylinder extending into the rotating drum is also clamped on the top surface of the outer shell, and a second pump body is arranged between the suction cylinder and the dephosphorization tank.

[0011] Furthermore, a support ring is fixedly connected inside the outer shell, and the outer wall of the upper end of the rotating cylinder is slidably connected to the inner ring wall of the support ring.

[0012] Furthermore, a second filter box is lifted and lowered in the dephosphorization tank, the second filter box is filled with filter medium and a fifth connecting hole is opened at the bottom of the second filter box, and a third pump body is arranged between the second filter box and the clean water tank.

[0013] Furthermore, a screw rod is provided in the dephosphorization tank, one end of the second filter box is fixedly connected to a threaded sleeve sleeved outside the screw rod, and one end of the second filter box away from the threaded sleeve is slidably connected to the inner wall of the dephosphorization tank.

[0014] Furthermore, the water purification pool includes a closed box body, a mounting box is fixedly mounted on the top surface of the box body, an ultraviolet lamp is also mounted in the mounting box, and the bottom surface of the mounting box is located in the box body and is a transparent plate.

[0015] Furthermore, the box body is also provided with a gravity pipe communicating with the outside, and one end of the gravity pipe located outside the box body is also hinged with a third cover plate.

[0016] Furthermore, the box body is fixedly connected with a derivation pipe communicating with the inside and outside thereof, and a fourth pump body is arranged on the derivation pipe, wherein a groove is recessed on the inner bottom surface of the box body, and one end of the derivation pipe located in the box body extends into the groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Multiple treatment components are set up to carry out targeted treatment, which can better treat domestic sewage with more complex components, and finally purify and store domestic sewage, and the treated water meets the discharge standards;

[0019] The disinfection box can be used to conveniently place the disinfectant. At the same time, since the first cover is provided to cover the upper end of the disinfection pool, other impurities can be prevented from accidentally falling in.

[0020] A stirring component is installed in the disinfection pool, so that the disinfectant can dissolve faster. At the same time, the stirring further improves the disinfection efficiency, ultimately improving the overall efficiency of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 A partial schematic diagram of an embodiment of the present invention Figure 1 ;

[0023] Figure 3 A partial schematic diagram of an embodiment of the present invention Figure 2 ;

[0024] Figure 4 A partial schematic diagram of an embodiment of the present invention Figure 3 ;

[0025] Figure 5 for Figure 1 A partial enlarged schematic diagram in the middle;

[0026] In the above drawings:

[0027] Disinfection pool 1, separation pool 2, phosphorus removal pool 3, water purification pool 4, first motor 5, stirring rod 6, first cover plate 7, loading cylinder 8, hollow section 9, first connecting hole 10, second connecting hole 11, support plate 12, second cover plate 13, stirring blade 14, water inlet pipe 15, first filter box 16, partition 17, first pump body 18, first connecting pipe 19, lifting rod 20, first opening and closing door 21, outer shell 22, rotating cylinder 23, second motor 24, suction cylinder 25, second pump body 26, second connecting pipe 27, third connecting pipe 28, support ring 29, second filter box 30, third pump body 31, fourth connecting pipe 32, telescopic tube 33, screw rod 34, threaded sleeve 35, rotating ring 36, box body 37, installation box 38, ultraviolet lamp 39, transparent plate 40, gravity pipe 41, third cover plate 42, outlet pipe 43, fourth pump body 44, groove 45. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] like Figure 1 , 2 As shown, the present embodiment provides a domestic sewage treatment system at a construction site, which includes a disinfection pool 1, a separation pool 2, a phosphorus removal pool 3 and a clean water pool 4 connected in sequence. After being treated in the disinfection pool 1, the sewage is introduced into the separation pool 2 to remove oil stains, and then introduced into the phosphorus removal pool 3, and finally introduced into the clean water pool 4 for storage; wherein, a first motor 5 is installed under the disinfection pool 1, and the rotating shaft of the first motor 5 is fixedly connected to a stirring rod 6 arranged in the disinfection pool 1, and the disinfection pool 1 is also covered with a first cover plate 7, and a loading cylinder 8 is placed on the first cover plate 7, which passes through the first cover plate 7 and extends into the disinfection pool 1, the stirring rod 6 includes a hollow section 9 and the loading cylinder 8 extends into the hollow section 9, the loading cylinder 8 is provided with a first connecting hole 10, and the hollow section 9 is provided with a second connecting hole 11.

[0031] In the above embodiment, the loading cylinder 8 can be loaded with a disinfectant. After the sewage is introduced into the disinfection pool 1, the disinfectant is put in and the first motor 5 is started to stir the sewage. The disinfectant can be dissolved more quickly with the stirring, thereby achieving efficient disinfection. The sewage after disinfection continues to undergo subsequent treatment and is finally stored in the clean water pool 4. The loading cylinder 8 is separated from the hollow section 9. When the stirring rod 6 rotates, the loading cylinder 8 is in a stationary state, and the sewage is in a flowing state, which can dissolve the disinfectant more quickly.

[0032] This embodiment is provided with multiple processing components for targeted processing, which can better process domestic sewage with more complex components, and finally purify the domestic sewage and store it;

[0033] The disinfection box can be used to conveniently place the disinfectant. At the same time, since the first cover plate 7 is provided to cover the upper end of the disinfection pool 1, it can prevent other impurities from accidentally falling in.

[0034] A stirring component is provided in the disinfection pool 1, so that the disinfectant can be dissolved faster, and the disinfection efficiency is further improved with stirring, thereby ultimately improving the overall efficiency of sewage treatment.

[0035] like Figure 1 , 2 As shown, the upper end of the loading cylinder 8 is fixedly connected with a support plate 12, and the support plate 12 is provided with a delivery port connected to the loading cylinder 8, and the delivery port is clamped with a second cover plate 13. The disinfectant is loaded into the loading cylinder 8 from the delivery port, and the delivery port is covered with the second cover plate 13, and then the first motor 5 is started to stir the sewage. While stirring, the sewage enters the loading cylinder 8 from the second connecting hole 11 and the first connecting hole 10 to dissolve the disinfectant, so that the disinfectant diffuses outward from the center of stirring, and the disinfection is carried out rapidly with the stirring. After a period of stirring, the disinfectant is completely dissolved, and the disinfection is completed after a period of time (such as stirring for 20 minutes to completely dissolve, and then continuing to stir for 15 minutes to complete the disinfection), and then it is introduced into the subsequent processing steps;

[0036] Specifically, the stirring rod 6 is fixedly connected with a stirring blade 14 , and as the first motor 5 runs, the stirring blade 14 stirs the sewage along with the stirring rod 6 in the sewage.

[0037] like Figure 1 As shown, a water inlet pipe 15 is also provided on the first cover plate 7 for introducing sewage into the disinfection pool 1 to avoid frequent opening of the first cover plate 7 causing impurities to enter. The first cover plate 7 can be opened again after multiple treatments to clean the bottom of the disinfection pool 1.

[0038] like Figure 1 ,3 As shown, the bottom surface of the disinfection pool 1 is also mounted with a first filter box 16, a partition 17 is fixedly connected to the first filter box 16, and the first filter box 16 is also filled with a filter medium located above the partition 17, a first pump body 18 is arranged between the portion of the first filter box 16 located below the partition 17 and the separation pool 2, a third connecting hole is arranged at the portion of the first filter box 16 located above the partition 17, and a fourth connecting hole is arranged on the partition 17. Specifically, the disinfection pool 1 and the separation pool 2 are connected through a first connecting pipe 19, and the first pump body 18 is arranged on the first connecting pipe 19. The disinfected sewage enters the first filter box 16 under the pumping of the first pump body 18, and is filtered on both sides of the first filter box 16 and the filter medium before being pumped into the separation pool 2. This filtration is similar to the filtration in the prior art, and is used to intercept solid particle impurities, wherein the filter medium can be a steel mesh structure, or a sponge structure of plastic fiber, etc., mainly to intercept particles, and can also be taken out and cleaned before reuse;

[0039] Furthermore, in order to facilitate the removal of the first filter box 16 for cleaning, the upper end of the first filter box 16 is also fixedly connected with a lifting rod 20, and the upper end of the lifting rod 20 extends to the upper end of the disinfection pool 1. After the first cover plate 7 is opened, the first filter box 16 can be taken out. In particular, the first filter box 16 is provided with a first opening and closing door 21 for convenient removal of the filter medium; specifically, the lower end of the first filter box 16 is inserted into a groove provided on the inner bottom surface of the disinfection pool 1, which plays a good fixing role and avoids the first filter box 16 from shaking when agitated.

[0040] like Figure 1As shown, the separation pool 2 includes a closed outer shell 22 and a rotating cylinder 23 arranged in the outer shell 22. The end of the first connecting pipe 19 away from the disinfection pool 1 is connected to the upper end of the outer shell 22 to guide the sewage into the rotating cylinder 23. A second motor 24 is installed below the outer shell 22 and the rotating shaft of the second motor 24 is fixedly connected to the rotating cylinder 23. The second motor 24 rotates to drive the rotating cylinder 23 to rotate in the outer shell 22, driving the sewage to rotate. After a period of rotation, the second motor 24 stops; the top surface of the outer shell 22 is also clamped with a suction cylinder 2 extending into the rotating cylinder 23 5, a second pump body 26 is arranged between the suction cylinder 25 and the dephosphorization tank 3, the sewage in the rotating cylinder 23 is allowed to stand for a period of time after rotation (e.g., rotation for 10 minutes, standing for 10 minutes), and then the second pump body 26 is started to pump the sewage into the dephosphorization tank 3 through the suction cylinder 25; specifically, a second connecting pipe 27 is arranged between the dephosphorization tank 3 and the outer shell 22, the second pump body 26 is arranged on the second connecting pipe 27, one end of the second connecting pipe 27 is connected to the suction cylinder 25, and the other end extends to the dephosphorization tank 3. When the second pump body 26 is running, the sewage in the rotating cylinder 23 is allowed to stand for a period of time, the upper layer is oily, the lower layer is water, and the second pump body 26 pumps water out to the dephosphorization tank 3. When oil is pumped into the second connecting pipe 27, the pumping is stopped (particularly, the second connecting pipe 27 can be set as a transparent hose, which is convenient for observing the internal liquid state and convenient for removing the suction cylinder 25). At this time, one end of the second connecting pipe 27 located in the dephosphorization tank 3 can be moved out of the dephosphorization tank 3 and the second pump body 26 is started to pump out the oil. At the same time, the oil can be pumped out through the third connecting pipe 28 arranged on the outer shell 22 (one end of the third connecting pipe 28 extends to the bottom of the rotating cylinder 23, and the other end extends to the outside of the outer shell 22 to be connected to a separate pump body). Specifically, The suction cylinder 25 and one end of the third connecting pipe 28 located in the rotating cylinder 23 both extend to the bottom of the rotating cylinder 23 (specifically, as the water is pumped into the dephosphorization tank 3, the oil in the rotating cylinder 23 falls to the lower end of the rotating cylinder 23, and extending the third connecting pipe 28 to the bottom of the rotating cylinder 23 can more thoroughly extract the oil), which facilitates the extraction of liquid in the rotating cylinder 23. Furthermore, the rotating cylinder 23 has a structure that is larger at the top and smaller at the bottom, so that more oil residue at the lower end can be extracted, preventing excessive oil residue from remaining in the rotating cylinder 23. Furthermore, a second opening and closing door is also provided on the outer shell 22 to facilitate regular cleaning of the components in the outer shell 22.

[0041] like Figure 1As shown, in order to make the operation of the rotating cylinder 23 more stable, a support ring 29 is fixedly connected inside the outer shell 22, and the outer wall of the upper end of the rotating cylinder 23 is slidably connected to the inner ring wall of the support ring 29. Specifically, the upper end of the rotating cylinder 23 is a bell-mouth structure, and the outer wall of the upper end is in sliding contact with the support ring 29. When the second motor 24 is running, the outer wall of the rotating cylinder 23 slides relative to the inner ring wall of the support ring 29, thereby providing a stable foundation for the rotation of the rotating cylinder 23 at the upper end of the rotating cylinder 23 to avoid shaking. Furthermore, in order to allow the sewage to smoothly enter the rotating cylinder 23, one end of the first connecting pipe 19 is located above the rotating cylinder 23 at the outer shell 22, and the upper end of the rotating cylinder 23 is slidably connected to the inner wall of the outer shell 22, which can prevent sewage from entering the gap between the outer shell 22 and the rotating cylinder 23.

[0042] like Figure 1 , 4 As shown, after the sewage enters the dephosphorization tank 3, a dephosphorization agent is added into the dephosphorization tank 3. After a period of treatment, solid impurities are precipitated at the bottom of the dephosphorization tank 3, and the upper clear liquid is the treated water. In order to facilitate the introduction of the upper water into the clean water tank 4, a second filter box 30 is lifted and lowered in the dephosphorization tank 3. The second filter box 30 is filled with filter medium and a fifth connecting hole is opened at the bottom of the second filter box 30. A third pump body 31 is arranged between the second filter box 30 and the clean water tank 4. Specifically, a fourth connecting pipe 32 is provided between the clean water tank 4 and the dephosphorization tank 3, and the third pump body 31 is provided on the fourth connecting pipe 32. One end of the fourth connecting pipe 32 is connected to a telescopic pipe 33, and the other end is connected to the clean water tank 4. The end of the telescopic pipe 33 away from the fourth connecting pipe 32 is connected to the second filter box 30. When the third pump body 31 is running, water enters the second filter box 30 through the fifth connecting hole, and enters the telescopic pipe 33 and the fourth connecting pipe 32 after being filtered by the filter medium, and finally enters the clean water tank 4. In the process, it is filtered again by the filter medium to ensure that the solid matter settled in the dephosphorization tank 3 will not be introduced into the clean water tank 4. The filter medium provided therein is consistent with the aforementioned filter medium, and materials such as activated carbon with better filtering effect can also be used. Similarly, a third opening and closing door is provided on the second filter box 30 for conveniently removing or loading the filter medium.

[0043] What is important is that the second filter box 30 is set in the dephosphorization tank 3 for lifting, so that the position of the second filter box 30 can be adjusted according to the thickness of the bottom sediment to avoid the fifth connecting hole from being blocked. The setting of the telescopic tube 33 ensures that the lifting of the second filter box 30 will not have adverse effects on the fourth connecting pipe 32 and the third pump body 31.

[0044] like Figure 1 , 4As shown, specifically, a screw rod 34 is provided in the dephosphorization tank 3, one end of the second filter box 30 is fixedly connected with a threaded sleeve 35 sleeved outside the screw rod 34, and one end of the second filter box 30 away from the threaded sleeve 35 is slidably connected to the inner wall of the dephosphorization tank 3, and the upper end of the screw rod 34 extends to the top of the dephosphorization tank 3, and the screw rod 34 can be rotated above the dephosphorization tank 3, and the lower end of the screw rod 34 is rotatably connected to the bottom of the dephosphorization tank 3 (that is, the bottom of the dephosphorization tank 3 is provided with a hole for accommodating the lower end of the screw rod 34, and the screw rod 34 can rotate in the hole), and a rotating ring 36 is also fixedly installed on the inner wall of the dephosphorization tank 3, and the upper end of the screw rod 34 The end is also rotatably connected to the rotating ring 36 (specifically, the portion where the screw rod 34 contacts the rotating ring 36 is a smooth section), so that the screw rod 34 can be more conveniently adjusted. Specifically, the screw rod 34 can be rotated above the rotating ring 36. The setting of the rotating ring 36 enables the screw rod 34 to have a rotation basis both above and below, thereby enabling more stable rotation adjustment. When the screw rod 34 is rotated, since the other end of the second filter box 30 is slidingly connected to the dephosphorization tank 3, the threaded sleeve 35 cannot rotate with the screw rod 34, so that the threaded sleeve 35 can move up and down driven by the screw rod 34, so that the second filter box 30 can be raised and lowered.

[0045] like Figure 1 , 5 As shown, the water purification pool 4 includes a closed box 37, and the fourth connecting pipe 32 extends into the box 37 to guide the dephosphorized water into the water purification pool 4 (box 37). A mounting box 38 is fixedly installed on the top surface of the box 37, and an ultraviolet lamp 39 is also installed in the mounting box 38. The bottom surface of the mounting box 38 is located in the box 37 and is a transparent plate 40. The ultraviolet light emitted by the ultraviolet lamp 39 can penetrate the transparent plate 40 and enter the box 37 to sterilize the water with ultraviolet light, thereby preventing the water from being contaminated again due to long-term storage.

[0046] Furthermore, the box body 37 is also provided with a gravity pipe 41 connected to the outside, and the gravity pipe 41 is hingedly connected to a third cover plate 42 at one end outside the box body 37. When there is too much water in the water purification pool 4, the excess water flows to the outside of the box body 37 through the gravity pipe 41. In particular, the gravity pipe 41 is located below the transparent plate 40, thereby ensuring that the water will not contact the transparent plate 40, thereby preventing water from entering the installation box 38 due to leakage and the like and affecting the ultraviolet lamp 39; the hinged third cover plate 42 can prevent external insects and the like from entering the water purification pool 4 through the gravity pipe 41, and can also prevent leakage from the appearance to the outside.

[0047] like Figure 1As shown, in order to facilitate the use of water in the clean water pool 4, the box body 37 is also fixedly connected with a derivation pipe 43 connecting the inside and the outside thereof, and a fourth pump body 44 is arranged on the derivation pipe 43, wherein a groove 45 is recessed on the inner bottom surface of the box body 37, and one end of the derivation pipe 43 located in the box body 37 extends into the groove 45, so that the water in the clean water pool 4 (inside the box body 37) can be pumped out through the fourth pump body 44.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A construction site domestic sewage treatment system, characterized in that: It includes a disinfection pool, a separation pool, a dephosphorization pool and a clean water pool connected in sequence. After being treated in the disinfection pool, the sewage is introduced into the separation pool to remove oil stains, and then introduced into the dephosphorization pool, and finally introduced into the clean water pool for storage; wherein a first motor is installed below the disinfection pool, and the rotating shaft of the first motor is fixedly connected to a stirring rod arranged in the disinfection pool. The disinfection pool is also covered with a first cover plate, and a loading cylinder is placed on the first cover plate, which passes through it and extends into the disinfection pool. The stirring rod includes a hollow section and the loading cylinder extends into the hollow section. The loading cylinder A first connecting hole is provided on the carrier cylinder, and a second connecting hole is provided in the hollow section; a first filter box is also mounted on the bottom surface of the disinfection pool, a partition is fixedly connected to the first filter box, and the first filter box is also filled with a filter medium located above the partition, a first pump body is provided between the part of the first filter box located below the partition and the separation pool, a third connecting hole is provided on the part of the first filter box located above the partition, and a fourth connecting hole is provided on the partition; the separation pool includes a closed outer shell and a rotating cylinder arranged in the outer shell, A second motor is installed under the outer shell, and the rotating shaft of the second motor is fixedly connected to the rotating cylinder; a suction cylinder extending into the rotating cylinder is also clamped on the top surface of the outer shell, and a second pump body is arranged between the suction cylinder and the dephosphorization tank; a support ring is fixedly connected to the outer shell, and the outer wall of the upper end of the rotating cylinder is slidably connected to the inner ring wall of the support ring; the disinfection tank and the separation tank are connected through a first connecting pipe, and the first pump body is arranged on the first connecting pipe, and the end of the first connecting pipe away from the disinfection tank is connected to the upper end of the outer shell to introduce sewage into the rotating cylinder; A second connecting pipe is arranged between the phosphorus pool and the outer shell, the second pump body is arranged on the second connecting pipe, one end of the second connecting pipe is connected to the suction cylinder, and the other end extends to the dephosphorization pool; a third connecting pipe is also arranged on the outer shell, and the ends of the suction cylinder and the third connecting pipe located in the rotating cylinder both extend to the bottom of the rotating cylinder; the rotating cylinder is a structure with a larger top and a smaller bottom; the water purification pool includes a closed box body, an installation box is fixedly installed on the top surface of the box body, an ultraviolet lamp is also installed in the installation box, and the bottom surface of the installation box is located in the box body and is a transparent plate; a dephosphorization agent is put into the dephosphorization pool.

2. A construction site domestic sewage treatment system as claimed in claim 1, characterized in that: The upper end of the loading cylinder is fixedly connected with a supporting plate, the supporting plate is provided with a delivery port communicated with the loading cylinder, and the delivery port is clamped with a second cover plate.

3. A construction site domestic sewage treatment system as claimed in claim 1, characterized in that: A second filter box is lifted and lowered in the dephosphorization tank, the second filter box is filled with filter medium and a fifth connecting hole is opened at the bottom of the second filter box, and a third pump body is arranged between the second filter box and the clean water tank.

4. A construction site domestic sewage treatment system as claimed in claim 3, characterized in that: A screw rod is arranged in the dephosphorization tank, one end of the second filter box is fixedly connected with a threaded sleeve sleeved outside the screw rod, and one end of the second filter box away from the threaded sleeve is slidably connected to the inner wall of the dephosphorization tank.

5. A construction site domestic sewage treatment system as claimed in claim 1, characterized in that: The box body is also provided with a gravity pipe communicating with the outside, and one end of the gravity pipe located outside the box body is also hinged with a third cover plate.

6. A construction site domestic sewage treatment system as claimed in claim 5, characterized in that: The box body is also fixedly connected with a guide pipe communicating with the inside and outside thereof, and a fourth pump body is arranged on the guide pipe, wherein a groove is recessed on the inner bottom surface of the box body, and one end of the guide pipe located in the box body extends into the groove.

Images