CN217103471U

CN217103471U - Treatment system for effectively adjusting rainwater drainage

Info

Publication number: CN217103471U
Application number: CN202123219079.1U
Authority: CN
Inventors: 蔡智君; 李文俊; 胡躬行
Original assignee: Guangdong Liangke Environmental Engineering Co ltd
Current assignee: Guangdong Liangke Environmental Engineering Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-08-02
Anticipated expiration: 2031-12-21

Abstract

The utility model relates to a rainwater treatment discharges the field, discloses an effectively adjust processing system of rainwater drainage, including collection module, preprocessing module and biochemical treatment module, collection module's delivery port with preprocessing module's water inlet is connected, preprocessing module's delivery port with biochemical treatment module's water inlet is connected. Through carrying out concentrated minimizing to the rainwater, applicable in some large-scale sewage treatment plants implementing the confluence of rain and sewage, can effectively reduce the rainwater treatment scale that will incorporate into sewage treatment system, reduce follow-up biochemical treatment's load, the not enough problem of carbon source when having solved biochemical system and handling avoids the impact that brings in the heavy rain period, ensures current sewage system's reliable and stable operation.

Description

Treatment system for effectively adjusting rainwater drainage

[ technical field ] A

The utility model relates to a rainwater is handled and is discharged the field, in particular to effectively adjust processing system of rainwater drainage.

[ background of the invention ]

The rainwater and sewage combined system refers to a drainage mode of collecting and conveying urban sewage and rainwater by using the same pipe duct, and is divided into a direct drainage mode, a full treatment mode and a interception mode, the combined system is particularly suitable for drainage systems of northern cities and towns with low precipitation and drought and small catchment areas, and the adverse places of the combined system are very serious in harm to the environment.

Due to insufficient construction and reconstruction funds, rain and sewage are still converged in most areas in China at present, and rainwater is converged and occupies a sewage pipe network, so that the cost of sewage treatment is increased, and the emission reduction effect of COD is also influenced.

If adopt the confluence system to send city domestic sewage, industrial waste water and rainwater to the sewage factory and handle, then discharge, it is better from the control with prevent that the water from polluting to see, but can make the trunk pipe oversize like this, sewage capacity also increases a lot, construction and operation cost also correspondingly increase by a wide margin, but current sewage treatment system load is on the small side, can't adapt to the impact of a large amount of rainwater of introducing in the stormy season, lead to the unable normal operation of rear end biochemical system, influence reaching standard of final drainage.

[ summary of the invention ]

The utility model discloses a aim at solving above-mentioned problem and provide an effectively adjust rainwater drainage's processing system, solve current rainwater drainage system can not be better when rainy day with rainwater and sewage treatment, it is too big often to appear needing the processing water yield, leads to processing system to load too big, problem that can not the steady operation.

To achieve the purpose, the utility model adopts the following technical proposal:

a treatment system for effectively adjusting rainwater drainage comprises a collection module, a pretreatment module and a biochemical treatment module, wherein a water outlet of the collection module is connected with a water inlet of the pretreatment module, and a water outlet of the pretreatment module is connected with a water inlet of the biochemical treatment module;

the pretreatment module comprises a high-density sedimentation tank, a first lifting pump, a first filtering device, a second lifting pump and a second filtering device, wherein the water inlet of the high-density sedimentation tank is connected with the collection module, the water outlet of the high-density sedimentation tank is connected with the water inlet of the first lifting pump, the water outlet of the first lifting pump is connected with the water inlet of the first filtering device, the water outlet of the first filtering device is connected with the water inlet of the second lifting pump, the water outlet of the second lifting pump is connected with the water inlet of the second filtering device, and the water outlet of the second filtering device is connected with the water inlet of the biochemical treatment module.

Preferably, the first filtering device is an activated carbon filter, the shell of the first filtering device is made of stainless steel anti-corrosion materials, and the height of an activated carbon filling layer in the first filtering device is 1.5-2.0 m.

Preferably, the second filtering device is a nanofiltration device, an inner filtering membrane of the nanofiltration device is made of cellulose acetate, and the aperture of the filtering membrane is 0.9-1.1 nm.

Preferably, the pretreatment module further comprises a dosing device, and the dosing device is arranged at the top of the high-density sedimentation tank.

Preferably, the dosing device comprises a coagulant adding device and a flocculant adding device, the coagulant adding device and the flocculant adding device are both connected with the top of the high-density sedimentation tank, and a coagulant and a flocculant are added into the high-density sedimentation tank.

Preferably, the biochemical treatment module comprises a biochemical treatment tank and a secondary sedimentation tank, a water inlet of the biochemical treatment tank is connected with a water outlet of the second filtering device, another water inlet of the biochemical treatment tank is connected with sewage, a water outlet of the biochemical treatment tank is connected with a water inlet of the secondary sedimentation tank, and a water outlet of the secondary sedimentation tank is connected with an external water outlet.

Preferably, the collection module comprises a collection tank and a third lift pump, rainwater enters from a water inlet of the collection tank, a water outlet of the collection tank is connected with a water inlet of the third lift pump, and a water outlet of the third lift pump is connected with a water inlet of the high-density sedimentation tank.

The utility model discloses a contribution lies in: the utility model discloses a carry out concentrated minimizing to the rainwater, applicable in some large-scale sewage treatment plants implementing the confluence of rain and sewage, can effectively reduce the rainwater treatment scale that is about to incorporate sewage treatment system, reduce follow-up biochemical treatment's load, the not enough problem of carbon source when having solved biochemical system and handling, the impact of avoiding rainstorm period to bring ensures current sewage system's reliable and stable operation.

[ description of the drawings ]

FIG. 1 is a schematic flow diagram of the structure of the treatment system of the present invention;

FIG. 2 is a process flow diagram of the present invention;

wherein: the system comprises a collection module 10, a collection tank 11, a third lift pump 12, a pretreatment module 20, a high-density sedimentation tank 21, a first lift pump 22, a first filtering device 23, a second lift pump 24, a second filtering device 25, a dosing device 26, a coagulant dosing device 261, a flocculant dosing device 262, a biochemical treatment module 30, a biochemical treatment tank 31 and a secondary sedimentation tank 32.

[ detailed description ] embodiments

The following examples are further to explain and supplement the present invention, and do not constitute any limitation to the present invention.

As shown in fig. 1-2, a treatment system for effectively regulating rainwater drainage comprises a collection module 10, a pretreatment module 20 and a biochemical treatment module 30, wherein a water outlet of the collection module 10 is connected with a water inlet of the pretreatment module 20, and a water outlet of the pretreatment module 20 is connected with a water inlet of the biochemical treatment module 30;

the pretreatment module 20 comprises a high-density sedimentation tank 21, a first lifting pump 22, a first filtering device 23, a second lifting pump 24 and a second filtering device 25, wherein a water inlet of the high-density sedimentation tank is connected with the collection module 10, a water outlet of the high-density sedimentation tank 21 is connected with a water inlet of the first lifting pump 22, a water outlet of the first lifting pump 22 is connected with a water inlet of the first filtering device 23, a water outlet of the first filtering device 23 is connected with a water inlet of the second lifting pump 24, a water outlet of the second lifting pump 24 is connected with a water inlet of the second filtering device 25, and a water outlet of the second filtering device 25 is connected with a water inlet of the biochemical treatment module 30.

Collection module 10 is used for collecting the rainwater, pretreatment module 20 is used for carrying out the preliminary treatment to the rainwater of collecting, make matters such as COD and suspended solid in the rainwater carry out filtration treatment, and directly discharge the rainwater of part low concentration, discharge the rainwater of high concentration into biochemical treatment module 30 and carry out biochemical treatment with sewage one, the concentration of sewage has been reduced on the one hand, on the other hand has also reduced the handling capacity of rainwater, the water consumption has been practiced thrift, subsequent processing load has effectually been reduced, avoid the impact that brings during the rainstorm period, ensure current sewage system's reliable and stable operation.

Specifically, when being in rainwater weather, collection module 10's 11 water inlets in collecting pit are opened, the rainwater can get into in the collecting pit 11 this moment, and take out the rainwater through third elevator pump 12 and carry out preliminary sedimentation treatment in the high density sedimentation tank 21, detach total phosphorus and the large granule suspended solid in the rainwater, then take out to first filter equipment 23 in with the rainwater in the high density sedimentation tank 21 through first elevator pump 22, first filter equipment 23 is active carbon filter equipment, can be better adsorb coloured organic matter and COD with in the rainwater, and can be further clear away the large granule suspended solid in the rainwater, the large granule material in the rainwater is clear away clean back, can avoid the filter membrane in follow-up second filter equipment 25 to be blockked up.

After the rainwater is filtered by the first filtering device 23, the rainwater is pumped into the second filtering device 25 through the second lift pump 24, the second filtering device 25 is a nanofiltration device, a part of filter membrane in the nanofiltration device can filter and concentrate the rainwater, soluble organic matters in the rainwater and divalent ions such as calcium, magnesium and the like are intercepted and removed, so that more concentrated water of about 20% and more produced water of about 80% are obtained, the concentration of pollutants in the produced water of about 80% is lower than the discharge standard, the produced water can be directly discharged outside, namely, the other water outlet of the second filtering device 25 is directly discharged outside, and the concentrated water of about 20% then enters the biochemical treatment tank 31.

The concentrated water discharged into the biochemical treatment tank 31 is mixed with the sewage discharged from the factory for treatment, the water quality after the biochemical treatment enters the secondary sedimentation tank 32 for further sedimentation, and finally the clear water above is discharged.

The utility model discloses a carry out concentrated minimizing to the rainwater, applicable in some large-scale sewage treatment plants implementing the confluence of rain and sewage, can effectively reduce the rainwater treatment scale that is about to incorporate sewage treatment system, reduce follow-up biochemical treatment's load, the not enough problem of carbon source when having solved biochemical system and handling, the impact of avoiding rainstorm period to bring ensures current sewage system's reliable and stable operation.

In a further description, the first filtering device 23 is an activated carbon filter, the housing of the first filtering device 23 is made of a stainless steel anticorrosive material, and the height of the activated carbon filling layer in the first filtering device 23 is 1.5-2.0 m.

First filter equipment 23 is mainly used for handling large granule suspended solid and COD in the rainwater, and what first filter equipment 23's shell adopted is that stainless steel anticorrosion material makes, can not be influenced by the acid material in the rainwater, and the active carbon filling volume in first filter equipment 23 highly is 1.5-2.0m in this scheme, and concrete active carbon layer height can be decided according to the size of handling the rainwater volume.

In a further description, the second filtering device 25 is a nanofiltration device, an inner filter membrane of the nanofiltration device is made of cellulose acetate, and the pore size of the filter membrane is 0.9-1.1 nm.

The second filtering device 25 mainly intercepts and removes soluble organic matters and divalent ions such as calcium, magnesium and the like in rainwater, and filters and concentrates the rainwater to obtain low-concentration and high-concentration rainwater, the low-concentration rainwater can be directly discharged to the outside, and the high-concentration rainwater needs to be pumped into the biochemical treatment tank 31 again to be subjected to biochemical treatment together with sewage and then can be discharged after reaching the standard.

In a further illustration, the pretreatment module 20 further comprises a drug adding device 26, and the drug adding device 26 is disposed at the top of the high-density sedimentation tank 21.

Further, the dosing device 26 includes a coagulant adding device 261 and a flocculant adding device 262, both the coagulant adding device 261 and the flocculant adding device 262 are connected to the top of the high-density sedimentation tank 21, and a coagulant and a flocculant are added into the high-density sedimentation tank 21.

The dosing device 26 is mainly used for adding a coagulant and a flocculant in the high-density sedimentation tank 21, so that suspended substances in rainwater are flocculated and precipitated, primary filtration is carried out, and large granular substances are removed.

To be further described, the biochemical treatment module 30 includes a biochemical treatment tank 31 and a secondary sedimentation tank 32, a water inlet of the biochemical treatment tank 31 is connected to a water outlet of the second filtering device 25, another water inlet of the biochemical treatment tank 31 is connected to the sewage, a water outlet of the biochemical treatment tank 31 is connected to a water inlet of the secondary sedimentation tank 32, and a water outlet of the secondary sedimentation tank 32 is connected to an external water outlet.

In a further description, the collection module 10 includes a collection tank 11 and a third lift pump 12, rainwater enters from a water inlet of the collection tank 11, a water outlet of the collection tank 11 is connected to a water inlet of the third lift pump 12, and a water outlet of the third lift pump 12 is connected to a water inlet of the high-density sedimentation tank 21.

Although the present invention has been disclosed by the above embodiments, the scope of the present invention is not limited thereto, and modifications, replacements, and the like made to the above members will fall within the scope of the claims of the present invention without departing from the concept of the present invention.

Claims

1. The utility model provides an effectively adjust processing system of rainwater drainage which characterized in that: the device comprises a collection module, a pretreatment module and a biochemical treatment module, wherein a water outlet of the collection module is connected with a water inlet of the pretreatment module, and a water outlet of the pretreatment module is connected with a water inlet of the biochemical treatment module;

2. A treatment system for effectively regulating storm water drainage as claimed in claim 1 wherein: the first filtering device is an activated carbon filter, the shell of the first filtering device is made of stainless steel anti-corrosion materials, and the height of an activated carbon filling layer in the first filtering device is 1.5-2.0 m.

3. A treatment system for effectively regulating the discharge of storm water according to claim 1 wherein: the second filtering device is a nanofiltration device, an inner filtering membrane of the nanofiltration device is made of cellulose acetate, and the aperture of the filtering membrane is 0.9-1.1 nm.

4. A treatment system for effectively regulating the discharge of storm water according to claim 1 wherein: the pretreatment module further comprises a dosing device, and the dosing device is arranged at the top of the high-density sedimentation tank.

5. A treatment system for effectively regulating the discharge of storm water according to claim 4 wherein: the dosing device comprises a coagulant adding device and a flocculant adding device, wherein the coagulant adding device and the flocculant adding device are both connected with the top of the high-density sedimentation tank, and the coagulant and the flocculant are added into the high-density sedimentation tank.

6. A treatment system for effectively regulating the discharge of storm water according to claim 1 wherein: the biochemical treatment module comprises a biochemical treatment tank and a secondary sedimentation tank, wherein a water inlet of the biochemical treatment tank is connected with a water outlet of the second filtering device, another water inlet of the biochemical treatment tank is connected with sewage, a water outlet of the biochemical treatment tank is connected with a water inlet of the secondary sedimentation tank, and a water outlet of the secondary sedimentation tank is connected with an external water outlet.

7. A treatment system for effectively regulating the discharge of storm water according to claim 1 wherein: the collecting module comprises a collecting tank and a third lifting pump, rainwater enters from a water inlet of the collecting tank, a water outlet of the collecting tank is connected with a water inlet of the third lifting pump, and a water outlet of the third lifting pump is connected with a water inlet of the high-density sedimentation tank.