CN215480230U

CN215480230U - Soil remediation water circulating system

Info

Publication number: CN215480230U
Application number: CN202121719836.9U
Authority: CN
Inventors: 范岗; 王诚臣; 曹怡俊; 衣俊; 埃德加·亚力山大·考特
Original assignee: Shanghai Zhuoyu Environment Engineering Co ltd
Current assignee: Shanghai Construction Engineering Environmental Technology Co ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-11
Anticipated expiration: 2031-07-27

Abstract

The utility model relates to a soil remediation water circulation system, which comprises a wastewater pool, a precipitation reaction pool, an intermediate water tank, a backwashing water tank, a filter press, a clean water pool and a pipeline, wherein the upper end of the wastewater pool is sequentially connected with the precipitation reaction pool, the intermediate water tank, the filter and the clean water pool through the pipeline; the bottom of the precipitation reaction tank is sequentially connected with a filter press and a wastewater tank through pipelines; the backwashing water tank is connected with the filter through a pipeline; a suction pump A is also connected to the pipeline between the wastewater pool and the precipitation reaction pool, a suction pump B is also connected to the pipeline between the intermediate water tank and the filter, a suction pump C is also connected to the pipeline between the backwashing water tank and the filter, and a suction pump D is also connected to the pipeline between the precipitation reaction pool and the filter press. The water circulation system provided by the utility model is used for collecting, reacting, precipitating and filtering the wastewater generated by soil remediation, and the treated wastewater can be put into use again, so that resources are saved, the generation of waste is reduced, and the discharge of sewage is reduced.

Description

Soil remediation water circulating system

Technical Field

The utility model relates to the field of water treatment equipment, in particular to a soil remediation water circulation system.

Background

In the soil leaching process, polluted soil is crushed and sieved to remove gravel to obtain a clean material, then the clean material is added with water and a medicament to react, supernatant liquid is recovered after the reaction, the lower precipitation part is dehydrated, and the repaired soil is obtained after the dehydration is completed.

The prior art, for example, patent of invention with application number of cn201510116768.x, discloses a soil ex-situ leaching system, which comprises a soil pretreatment unit, a physical separation unit, a synergistic elution unit, a wastewater treatment and reuse unit and a control unit, wherein the wastewater treatment system mainly comprises a wastewater collection tank, a sedimentation tank and a physicochemical treatment system. The method adopts a ferric salt alkali-adding precipitation method to remove heavy metals in water, and can reuse the synergist to treat the soil heavy metal elution wastewater after adding acid and adjusting back.

For the treatment of the leaching wastewater, how to realize the effective treatment of the leaching wastewater and the recycling process of the treated leaching wastewater are important, otherwise, secondary pollution is easily caused; and in the leaching wastewater treatment process, the problems of pipeline blockage, impurity retention and the like are easily caused after long-term use, so that the wastewater treatment efficiency is reduced and the treatment quality is reduced.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the soil remediation water circulation system, the backwashing device is additionally arranged to periodically perform backwashing on the circulation system, so that solid impurities are prevented from being retained and blocked, and the circulation treatment efficiency and the treatment quality are improved.

The technical purpose of the utility model is realized by the following technical scheme:

a soil remediation water circulation system comprises a wastewater pool, a precipitation reaction pool, an intermediate water tank, a backwashing water tank, a filter press, a clean water pool and a pipeline, wherein the upper end of the wastewater pool is sequentially connected with the precipitation reaction pool, the intermediate water tank, the filter and the clean water pool through the pipeline; the bottom of the precipitation reaction tank is sequentially connected with a filter press and a wastewater tank through pipelines; the backwashing water tank is connected with the filter through a pipeline; a suction pump A is also connected to the pipeline between the wastewater pool and the precipitation reaction pool, a suction pump B is also connected to the pipeline between the intermediate water tank and the filter, a suction pump C is also connected to the pipeline between the backwashing water tank and the filter, and a suction pump D is also connected to the pipeline between the precipitation reaction pool and the filter press.

Furthermore, a sludge concentration tank is arranged between the precipitation reaction tank and the filter press, a suction pump D is arranged on a pipeline between the sludge concentration tank and the filter press, and a suction pump E is arranged on a pipeline between the sludge concentration tank and the precipitation reaction tank; the two ends of the pipeline between the sludge concentration tank and the precipitation reaction tank are respectively connected with the upper end of the sludge concentration tank and the bottom of the precipitation reaction tank.

Further, the suction pumps B comprise two suction pumps B which are arranged between the filter and the middle water tank in parallel.

Furthermore, the top end of the sludge concentration tank is connected with the wastewater tank through a pipeline.

Further, the sedimentation reaction tank comprises a sedimentation tank and a medicine tank, the medicine tank is fixed on one side of the sedimentation tank, and the upper end of the medicine tank is communicated with the upper end of the sedimentation tank.

Further, a stirring device is also arranged at the upper end of the medicine pool.

Further, a medicine tank is arranged on one side of the medicine pool, a medicine feeding pipe is connected between the medicine tank and the medicine pool, and a suction pump F is connected to the medicine feeding pipe.

Further, the sedimentation tank is an inclined plate sedimentation tank or an inclined tube sedimentation tank.

Further, the filter press is a plate-and-frame filter press, and the filter is a quartz sand filter.

Compared with the prior art, the utility model has the beneficial effects that:

1. the soil remediation water circulation system provided by the utility model is used for collecting, reacting, precipitating and filtering the wastewater generated after soil remediation, and the treated wastewater can be used in soil remediation again, so that resources are saved, the generation of waste is reduced, and the discharge of sewage is reduced;

2. the solid-liquid separation is carried out on the precipitate in the sedimentation tank, and the separated liquid is reacted, precipitated and filtered again, so that the waste water discharge is reduced as much as possible, and the waste water is utilized to the maximum extent;

3. the filter, the sludge concentration tank and the pipeline are backwashed through the backwashing water tank and the suction pump, so that pipeline blockage and pollutant impurity retention are avoided, and the treatment quality and the treatment efficiency are improved.

Drawings

FIG. 1 is a schematic diagram of a soil remediation water circulation system of the present invention.

Fig. 2 is a schematic view of the filter conduit connection of the present invention.

Fig. 3 is a schematic view of pipe connection of a sludge thickener according to the present invention.

In the figure, 1, a wastewater tank; 2. an intermediate water tank; 3. a backwash water tank; 4. a filter; 5. a filter press; 6. a clean water tank; 7. a suction pump A; 8. a suction pump B; 9. a suction pump C; 10. a suction pump D; 11. a suction pump E; 12. a suction pump F; 13. a water inlet pipe; 14. a water outlet pipe; 15. a medicament canister; 16. a medicine feeding pipe; 17. an overflow pipe; 18. a sedimentation tank; 19. a medicine pool; 20. sludge thickening tank.

Detailed Description

The technical solution of the present invention is further described below with reference to specific embodiments:

a soil remediation water circulation system is shown in figures 1-3 and comprises a wastewater pool 1, a precipitation reaction pool, an intermediate water tank 2, a backwashing water tank 3, a filter 4, a filter press 5, a clean water pool 6 and a plurality of pipelines, wherein the wastewater pool 1, the precipitation reaction pool, the intermediate water tank 2, the filter 4 and the clean water pool 6 are sequentially connected through the pipelines, wastewater after soil treatment is collected in the wastewater pool 1, then the wastewater in the wastewater pool 1 is pumped to the precipitation reaction pool through a suction pump A7, after the wastewater is reacted and precipitated in the precipitation reaction pool, supernatant flows to the intermediate water tank 2 from the precipitation reaction pool, water in the intermediate water tank 2 is pumped to the filter 4 through a suction pump B8, and the water filtered by the filter 4 flows to the clean water pool 6 through the pipelines and can be reused; the bottom of the precipitation reaction tank is connected with a pressure filter 5 through a pipeline, water and sediments at the bottom of the precipitation reaction tank are pumped to the pressure filter 5 through a suction pump D10 for solid-liquid separation, and water generated after the solid-liquid separation flows to a wastewater tank 1 through a pipeline for retreatment. A sludge concentration tank 20 can be additionally arranged between the filter press 5 and the precipitation reaction tank, water and sediment at the bottom of the precipitation reaction tank are pumped into the sludge concentration tank 20 through a suction pump E11 to be precipitated again, then the sediment at the bottom of the sludge concentration tank 20 is pumped into the filter press 5 through a suction pump D10 to be subjected to solid-liquid separation, the water after the solid-liquid separation flows into the wastewater tank 1 again to be treated again, and the solid after the solid-liquid separation is specially treated. Clean water is stored in the backwashing water tank 3, the clean water in the backwashing water tank 3 is sent to the filter 4 or the sludge concentration tank 20 through the suction pump C9, the filter 4, the sludge concentration tank 20 and the pipeline are washed, and the washed wastewater flows back to the wastewater tank 1 through the pipeline.

Specifically, the sedimentation reaction tank includes sedimentation tank 18, medicine pond 19, and medicine pond 19 is fixed in 18 one sides of sedimentation tank, and 19 upper ends and 18 intercommunications in medicine pond, 19 upper end installation agitating unit in medicine pond, agitating unit include motor, stirring rake, drive the stirring rake through the motor and mix the stirring to adding the medicament in the medicine pond, the waste water that comes from the wastewater disposal basin. A medicament tank 15 is further arranged on one side of the medicament pool 19, the medicament tank 15 is connected with the medicament pool 19 through a medicament adding pipe 16, medicaments in the medicament tank 15 are sent to the medicament pool 19 through the medicament adding pipe 16 through a suction pump F12, and the suction pump F12 can be a metering pump. The sedimentation tank 18 is used for facilitating the sedimentation of the wastewater after the medicament is added, and can be an inclined plate sedimentation tank or an inclined tube sedimentation tank.

The intermediate tank 2 is mainly used for collecting the supernatant produced in the sedimentation tank 18, which may cause the sediment to be suspended if directly drawn from the sedimentation tank 18, and a pipe is connected to an upper end of the sedimentation tank 18, and the supernatant flows from the upper end of the sedimentation tank 18 to the intermediate tank 2.

Then the supernatant is directly extracted from the intermediate water tank 2 by a suction pump B8, two suction pumps B8 can be arranged, two suction pumps B8 are connected into the pipeline in parallel, one of the two suction pumps is used, and the other suction pump is used as a spare.

The filter 4 is a quartz sand filter, as shown in fig. 2, the top end of the filter 4 is connected with a water inlet pipe 13, the bottom of the filter 4 is provided with a water outlet pipe 14, the suction pump B sends the supernatant into the filter 4 through the water inlet pipe 13, the supernatant flows out of the water outlet pipe 14 after being filtered from top to bottom, and finally flows to the clean water tank 6 for utilization.

The sludge concentration tank 20 is in a tank shape, the upper end of the sludge concentration tank is open, the lower end of the sludge concentration tank is in an inverted cone shape, as shown in fig. 3, a pipeline and a suction pump E11 are arranged between the upper end of the sludge concentration tank 20 and the bottom of the sedimentation tank 18, sediment and water at the bottom of the sedimentation tank 18 are pumped into the sludge concentration tank 20 through the suction pump E11, an overflow pipe 17 is further arranged at the upper end of the sludge concentration tank 20, and the port of the overflow pipe 17 on the sludge concentration tank 20 is lower than the height of the pipeline where the suction pump E11 is connected to the sludge concentration tank 20; when the sediment in the sludge concentration tank 20 is precipitated again, the liquid at the upper part flows back to the wastewater tank 1 from the overflow pipe 17 to wait for treatment again, the sediment is formed at the bottom of the sludge concentration tank 20 again, and the sediment is pumped from the bottom of the sludge concentration tank 20 to the filter press 5 by the suction pump D10 to carry out solid-liquid separation. And the filter press 5 is a plate-and-frame filter press, solid-liquid separation is carried out on the precipitate through the plate-and-frame filter press, the separated solid substances are collected and then are treated separately, and the separated liquid flows back to the wastewater tank for treatment.

In this embodiment, there are two filters, as shown in fig. 1, where a, b, c, d, e, f, g, h, i, j, k, and m are valves, for example, when one of the filters is backwashed: when the valves d, e and j are opened and the valves a, b, c, f, h, i and k are closed, the clean water in the backwashing water tank 3 enters the filter 4 from the water outlet pipe 14 and flows out from the water inlet pipe 13 to finally flow to the wastewater tank 1.

When backwashing the two filters: the valves d, e, h, j, k are opened and the valves a, b, c, f, g, i, m are closed, and wastewater also flows from the inlet pipe 13 to the wastewater tank 1.

The above is merely an example, and the flow direction of the fluid in the pipeline can be changed by operating different valves, which is not described herein again.

In addition, the above-mentioned suction pump a, suction pump C, suction pump D, suction pump E, and suction pump F are only used for distinguishing different positions, and no special meaning is implied.

The present invention is further explained and not limited by the embodiments, and those skilled in the art can make various modifications as necessary after reading the present specification, but all the embodiments are protected by the patent law within the scope of the claims.

Claims

1. The soil remediation water circulation system is characterized by comprising a wastewater pool, a precipitation reaction pool, an intermediate water tank, a backwashing water tank, a filter press, a clean water pool and a pipeline, wherein the upper end of the wastewater pool is sequentially connected with the precipitation reaction pool, the intermediate water tank, the filter and the clean water pool through the pipeline; the bottom of the precipitation reaction tank is sequentially connected with a filter press and a wastewater tank through pipelines; the backwashing water tank is connected with the filter through a pipeline; still be connected with suction pump A on the pipeline between wastewater disposal basin and the sedimentation reaction pond, still be connected with suction pump B on the pipeline between middle water tank and the filter, still be connected with suction pump C on the pipeline between backwash water tank and the filter, still be connected with suction pump D on the pipeline between sedimentation reaction pond and the pressure filter.

2. The soil remediation water circulation system of claim 1, wherein a sludge concentration tank is further arranged between the sedimentation reaction tank and the filter press, the suction pump D is arranged on a pipeline between the sludge concentration tank and the filter press, and the suction pump E is further arranged on a pipeline between the sludge concentration tank and the sedimentation reaction tank; and two ends of a pipeline between the sludge concentration tank and the precipitation reaction tank are respectively connected with the upper end of the sludge concentration tank and the bottom of the precipitation reaction tank.

3. The soil remediation water circulation system of claim 1 wherein the suction pump B comprises two, two suction pumps B being mounted in parallel between the filter and the intermediate tank.

4. A soil remediation water circulation system as claimed in claim 2 wherein the top of the sludge concentration tank is connected to the waste via a pipe.

5. The soil remediation water circulation system of claim 1 wherein the precipitation reaction tank comprises a sedimentation tank and a drug tank, the drug tank is fixed on one side of the sedimentation tank, and the upper end of the drug tank is communicated with the upper end of the sedimentation tank.

6. The soil remediation water circulation system of claim 5 wherein the upper end of the drug basin is further provided with a stirring device.

7. The soil remediation water circulation system of claim 5 wherein a chemical tank is further provided on one side of the chemical tank, a chemical feeding pipe is connected between the chemical tank and the chemical tank, and a suction pump F is connected to the chemical feeding pipe.

8. A soil remediation water circulation system as claimed in claim 5 wherein the sedimentation tank is an inclined plate or tube sedimentation tank.

9. A soil remediation water circulation system as claimed in claim 1 wherein the pressure filter is a plate and frame pressure filter and the filter is a quartz sand filter.