CN210595570U - Engineering construction effluent treatment plant - Google Patents

Abstract

The utility model relates to an engineering construction wastewater treatment device, which comprises a liquid inlet, a reaction tank, a coagulation tank, a flocculation tank, a clarification tank, a filtering tank and a liquid outlet which are sequentially communicated, wherein the reaction tank is provided with a first medium adding port, and the reaction tank is internally provided with a first stirring mechanism; a second medium feeding port and a first medicament feeding port are formed in the coagulation tank, and a second stirring mechanism is arranged in the coagulation tank; a second medicament adding port is formed in the flocculation tank, and a third stirring mechanism is arranged in the flocculation tank; the top of depositing reservoir and the top intercommunication of filtering ponds, be equipped with the filtering component who is located the liquid outlet top in the filtering ponds, filtering component's top is equipped with the fourth rabbling mechanism that stretches into in the filtering ponds. The utility model adopts diversified combination, can meet the addition of various processes and media, and meets the requirements of different geological conditions, different water quality and different water quantity on the media; by the ingenious design of the guide shell, the high-quality continuous treatment of the wastewater can be realized.

Description

Engineering construction effluent treatment plant

Technical Field

The utility model belongs to an engineering construction effluent treatment plant especially relates to a tunnel construction engineering construction effluent treatment plant, belongs to the sewage treatment device field.

Background

Transportation has made rapid progress over the past decades, bringing on the one hand progress throughout society and improvements in the living standard of people, and on the other hand changing the environment and lifestyle of humans at an unprecedented rate. In order to meet the needs of economic development and daily traffic, China plans and builds a large number of railway and highway projects. In railway and highway projects, tunnel engineering accounts for a considerable proportion. The tunnel is built, so that the underground space is effectively utilized, and the traffic problem is solved. Tunnel engineering is often located in mountain areas and hilly areas which are not plain, some of the tunnel engineering are even located in drinking water source areas or water source conservation areas, and the tunnel engineering mostly belongs to serious disaster areas of water and soil loss in China, the ecological environment is very fragile, and a large amount of sewage generated in the tunnel engineering construction process is discharged if the sewage cannot be properly treated, so that the pollution to the mountain areas environment, particularly the water environment, is inevitable. Therefore, the problem of tunnel construction sewage must be paid high attention to coordinate the relationship between tunnel construction and original ecological environment resources.

The sources of the wastewater in the tunnel construction process are as follows:

(1) and (4) waste water generated by tunneling. And the externally circulated cooling water used in the TBM tunneling process is taken from a nearby river channel and is conveyed to TBM equipment through a pipeline, and the cooling water is directly discharged after heat exchange. The discharged wastewater is mixed with stone powder and is turbid white; in the drilling and blasting construction, water used for dust fall after tunnel blasting is discharged outside and contains a large amount of suspended matters.

(2) Rock crevice water in the tunnel. The fissure water flows into the tunnel drainage ditch after passing through the chemical grouting material and the concrete on the tunnel wall, and the water body is turbid white due to the mixing of the grouting material and the concrete.

(3) The rock-through layer contacts the water gushing generated in the water-rich area. The water quantity is large, the water quality is different according to different geological conditions, and a large amount of suspended matters are involved after the tunnel is flushed.

According to past construction experience, the flow of waste water discharged from a tunnel is greatly changed from several cubes per hour to hundreds of cubes per hour, and the waste water is mainly caused by the influence of many factors such as unfavorable geology, tunnel construction progress and the like.

At present, the main methods for treating tunnel construction wastewater comprise:

(1) and (5) naturally precipitating. No medicament is added, and only natural sedimentation is needed in a sedimentation tank. The sedimentation tank has larger scale, the micro-particles are not easy to be treated, but the sedimentation tank is relatively economic, such as a sand and stone material processing washing wastewater pre-sedimentation tank in the construction period.

(2) And (4) flocculating and settling. And (3) adding a flocculating agent into the sewage, and performing sedimentation separation treatment in a sedimentation tank. The sedimentation tank has larger scale and is provided with a flocculating agent adding facility, and the economic degree is only inferior to the natural sedimentation mode, such as a flocculation sedimentation tank for concrete mixing flushing wastewater in the construction period, grouting wastewater in a dam cofferdam, sandstone material processing flushing wastewater and the like.

(3) And (6) mechanical treatment. And (3) adding a flocculating agent into the sewage to enable the sludge to be coagulated and precipitated in the sedimentation tank, and performing mechanical dehydration treatment on the sludge. The method is suitable for the condition that the fine grain components of the sludge are more and the narrow field, but has higher investment and operation cost, and is suitable for mechanical complete equipment for fine sand recovery, sludge treatment, oily wastewater treatment, sewage recycling and the like in the construction period.

The 'precipitation' and the conventional 'coagulation + precipitation + filtration' processes adopted by the domestic tunnel construction wastewater can not meet the actual requirements of the tunnel construction wastewater. There are mainly the following problems:

1) the addition of the medium is single, and the requirements of different geographical geology, different water quality and different water quantity and different treatment are difficult to meet.

2) The construction sites are many, the occupied line is long, water treatment technicians are lack, tools are applied for a long time, and the like, so that the development of an integrated wastewater treatment system and equipment which are simple in operation, convenient to install and maintain and movable is urgently needed.

3) Under extreme conditions, various pollutants in the wastewater can not be removed to ensure that various indexes of the treated water can meet specified requirements.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to provide an engineering construction effluent treatment plant to solve adding of current sewage treatment device medium use singlely, be difficult to satisfy different geology of geography, different quality of water yield and different processing requirements scheduling problem

In order to solve the technical problem, the utility model discloses a technical scheme does:

a device for treating engineering construction wastewater comprises a liquid inlet, a reaction tank, a coagulation tank, a flocculation tank, a clarification tank, a filtration tank and a liquid outlet which are sequentially communicated, wherein a first medium adding port is formed in the reaction tank, and a first stirring mechanism is arranged in the reaction tank; a second medium feeding port and a first medicament feeding port are formed in the coagulation tank, and a second stirring mechanism is arranged in the coagulation tank; a second medicament adding port is formed in the flocculation tank, and a third stirring mechanism is arranged in the flocculation tank; the top of depositing reservoir and the top intercommunication of filtering ponds, be equipped with the filtering component who is located the liquid outlet top in the filtering ponds, filtering component's top is equipped with the fourth rabbling mechanism that stretches into in the filtering ponds.

Further, the bottom of the reaction tank is communicated with the bottom of the coagulation tank; the top of the coagulation tank is communicated with the bottom of the flocculation tank; the top of the flocculation tank is communicated with the bottom of the clarification tank.

Further, the top of flocculation basin is equipped with first water catch bowl, first water catch bowl passes through a plurality of grooves and/or hole and flocculation basin intercommunication, first water catch bowl and depositing reservoir intercommunication. The slots or holes can destroy large flocs to form small flocs.

Further, be equipped with second water catch bowl, swash plate clarification subassembly, scrape the mud subassembly from top to bottom in the clarification tank in proper order, second water catch bowl and filtering ponds intercommunication, the bottom of filtering ponds is equipped with the mud discharging mouth.

Optionally, the second water collecting tank adopts a bilateral weir structure, so that the effluent quality is improved.

Optionally, the inclined plate clarification component is a double-layer inclined plate clarification component, so that the mud-water separation efficiency can be further improved, and the occupied area of equipment is reduced.

Further, be equipped with open-top's draft tube in the flocculation basin, third rabbling mechanism stretches into in the draft tube, thoughtlessly congeal pond and draft tube intercommunication. Therefore, the wastewater flowing from the coagulation tank can be fully mixed with the medicament in the guide cylinder and then overflows out, so that the growth of the existing flocculating constituent is not influenced, and the continuous treatment of the wastewater is facilitated. Under the action of the third stirring mechanism in the guide cylinder, the recycling of internal flocs can be accelerated, and the medicament resources are saved.

Further, the horizontal position of the top end of the guide shell is lower than the horizontal position of the communication position of the first water collecting tank and the flocculation tank. Therefore, the hydraulic circulation of the wastewater in the flocculation tank can be ensured, and the wastewater or solid substances in the flocculation tank can be ensured to flow into the clarification tank in an overflow mode.

Further, be equipped with the buffer between flocculation basin and the clarification tank, the top and the flocculation basin intercommunication of buffer, the bottom and the clarification tank intercommunication of buffer.

Further, the bottom of the clarification tank is provided with a sludge collecting hopper and a sludge collecting groove which are sequentially communicated from top to bottom, and the sludge discharge port is communicated with the sludge collecting groove.

Furthermore, the sludge collecting hopper is conical, so that sludge can be conveniently collected; the sludge collecting groove is preferably of a square-top-ground-circle structure, sludge in the sludge collecting groove is conveyed through a sludge discharge port, and the sludge discharge port can be connected with related conveying equipment through a sludge discharge pipeline.

Further, engineering construction effluent treatment plant includes the cell body, reaction tank, coagulating basin, flocculation basin, clarification tank, filtering ponds all set up in the cell body, and further, can adopt the baffling board to realize that inside liquid or material flow according to the predetermined direction. Therefore, the integrated equipment is formed, the structure is compact and reasonable, and the operation and the maintenance can be convenient.

Further, the setting of rabbling mechanism can choose for use as required, promotes the stirring effect.

The wastewater to be treated is introduced into the reaction tank from the liquid inlet, and the wastewater, the medicine and the medium in the reaction tank can be uniformly stirred by the first stirring mechanism in the introduction process, so that the generation of precipitates is prevented, and the transmission of the medium is facilitated; a flow baffle plate can be arranged between the reaction tank and the coagulation tank, wastewater enters the coagulation tank from bottom to top, and meanwhile, reaction agents are added according to the ratio and stirred by the second stirring mechanism, so that the wastewater is reacted uniformly. A flow guide channel can be arranged between the coagulation tank and the flocculation tank, a hydraulic accelerating device can be arranged at the center of the lower end of the flow guide channel, the coagulated water passes through the hydraulic accelerating device and then is accelerated to enter the flow guide cylinder, and the existing wastewater in the flow guide cylinder is accelerated and circularly stirred; the flocculated wastewater rises from the top end of the guide cylinder and overflows to the buffer zone after passing through the first water collecting tank.

And the wastewater and flocculate in the buffer zone enter a clarification tank from the bottom of the clarification tank for concentration, clarification and sludge-water separation to obtain supernatant and lower flocculate or sludge. The whole engineering construction wastewater treatment device can realize better mass transfer mixing and sedimentation prevention effects, and meanwhile, the device is simplified, the cost is reduced, and the treatment effect is improved. And the clear liquid treated by the clarification tank enters the filter tank after passing through the second water collecting tank, and is discharged from a liquid outlet at the bottom of the filter tank after being filtered. The lower layer flocculate and the sludge naturally settle on the sludge collecting hopper, and the sludge scraping component automatically and slowly pushes the sludge on the sludge collecting hopper to the sludge collecting tank and discharges the sludge through the sludge discharge port.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1) the adoption of diversified combination can meet the requirements of various processes and various media, and the requirements of different geographical geology, different water quality and different water quantity on the media are met.

2) By the ingenious design of the guide shell, the high-quality continuous treatment of the wastewater can be realized.

3) The integrated structure design is adopted, and the device has the advantages of small occupied area, simplicity in operation, convenience in operation and maintenance, capability of continuous operation and the like.

4) By setting the recycling function of media such as sludge backflow, the wastewater treatment effect is improved, and the wastewater treatment cost is reduced.

Drawings

FIG. 1 is a schematic view of a construction wastewater treatment apparatus according to a first embodiment of the present invention.

In the figure, 1-a reaction tank, 2-a coagulation tank, 3-a flocculation tank, 4-a clarification tank, 5-a filtration tank, 6-a first stirring mechanism, 7-a second stirring mechanism, 8-a third stirring mechanism, 9-a fourth stirring mechanism, 10-a flow baffle, 11-a flow guide channel, 12-a hydraulic speed-raising mechanism, 13-a flow guide cylinder, 14-a first water collecting tank, 15-a buffer zone, 16-a second water collecting tank, 17-a sludge collecting hopper, 18-a sludge scraping component, 19-a sludge collecting tank, 20-a sludge discharge port, 21-an inclined plate clarification component, 22-a liquid inlet, 23-an overflow port, 24-a drain port, 25-a first medium feeding port, 26-a second medium feeding port, 27-a first agent feeding port, 28-a first return sludge feeding port, 29-a second medicament adding port, 30-a second return sludge adding port, 31-a third medicament adding port, 32-an acid-base monitoring port, 33-a filtering component and 34-a liquid outlet.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1, the engineering construction wastewater treatment device comprises a liquid inlet 22, a reaction tank 1, a coagulation tank 2, a flocculation tank 3, a clarification tank 4, a filtration tank 5 and a liquid outlet 34 which are sequentially communicated, wherein a first medium adding port 25 is arranged on the reaction tank 1, and a first stirring mechanism 6 is arranged in the reaction tank 1; a second medium adding port 26 and a first medicament adding port 27 are arranged on the coagulation tank 2, and a second stirring mechanism 7 is arranged in the coagulation tank 2; a second medicament adding port 29 is formed in the flocculation tank 3, and a third stirring mechanism 8 is arranged in the flocculation tank 3; the top of depositing reservoir 4 and the top intercommunication of filtering ponds 5, be equipped with the filtering component 33 who is located the liquid outlet 34 top in the filtering ponds 5, the top of filtering component 33 is equipped with the fourth rabbling mechanism 9 that stretches into in the filtering ponds.

The bottom of the reaction tank 1 is communicated with the bottom of the coagulation tank 2; the top of the coagulation tank 2 is communicated with the bottom of the flocculation tank 3; the top of the flocculation tank 3 is communicated with the bottom of the clarification tank 4. The reaction tank and the coagulation tank are separated by a flow baffle plate 10, and the lower end of the flow baffle plate is suspended, so that the bottom of the reaction tank is communicated with the bottom of the coagulation tank.

The arrangement of the first stirring mechanism in the reaction tank 1 can accelerate the mixing and reaction of the wastewater and the medium and prevent the generation of precipitate.

The top of the flocculation tank 3 is provided with a first water collecting tank 14, the first water collecting tank 14 is communicated with the flocculation tank 3 through a plurality of grooves and/or holes, and the first water collecting tank 14 is communicated with the clarification tank 4.

Be equipped with second water catch bowl 16, swash plate clarification subassembly 21, scrape mud subassembly 18 from top to bottom in the depositing reservoir 4 in proper order, second water catch bowl 16 and filtering ponds 5 intercommunication, the bottom of filtering ponds 5 is equipped with row mud mouth 20.

The flocculation tank 3 is internally provided with a guide shell 13 with an open top, the third stirring mechanism 8 extends into the guide shell 13, and the coagulation tank 2 is communicated with the guide shell 13 through a guide channel 11. The center of the lower end of the diversion channel 11 is provided with a hydraulic accelerating mechanism 12, and water after coagulation reaction enters the hydraulic accelerating mechanism 12 through the diversion channel 11 and then enters a diversion cylinder 13 in the flocculation tank 3 in an accelerating manner.

The third stirring mechanism 8 of the guide shell can accelerate and circularly stir the wastewater in the guide shell; the wastewater rises from the top end of the guide shell 13, passes through the first water collecting tank 14 and overflows to the buffer area 15.

The horizontal position of the top end of the guide cylinder 13 is lower than that of the first water collecting tank. Thus, it is ensured that the wastewater in the flocculation tank is hydraulically circulated and that the wastewater and/or solid substances in the flocculation tank flow into the buffer zone 15 in an overflow manner.

Be equipped with buffer 15 between flocculation basin 3 and the clarification tank 4, the top and the flocculation basin intercommunication of buffer 15, the bottom and the clarification tank intercommunication of buffer.

The engineering construction wastewater treatment device comprises a tank body, wherein the reaction tank 1, the coagulation tank 2, the flocculation tank 3, the clarification tank 4 and the filtration tank 5 are all arranged in the tank body.

The top of the flocculation tank is provided with a first return sludge adding port 28, a second return sludge adding port 30 and a second medicament adding port 29 which are communicated with the bottom of the guide shell 13, so that sludge can be conveniently returned and medicaments can be conveniently added.

The wastewater and flocculate in the buffer zone 15 enter the clarification tank 4 from the bottom for concentration, clarification and sludge-water separation to obtain supernatant and lower flocculate or sludge. The clear liquid enters the filter tank 5 through the second water collecting tank 16, and the lower layer flocculate and sludge naturally settle on the sludge collecting hopper 17. Optionally, the second water collecting tank 16 adopts a bilateral weir structure, so that the effluent quality is improved.

The bottom of the clarification tank 4 is provided with a conical sludge collecting hopper 17 and a sludge scraping component 18, the lower layer flocculate and sludge naturally settle on the sludge collecting hopper 17, and the sludge scraping component 18 automatically and slowly pushes the sediment on the sludge collecting hopper 17 to a sludge collecting tank 19.

The top of the filtering tank is provided with a third medicament feeding port 31 and an acid-base monitoring port 32, and the bottom of the filtering tank is provided with a filtering component, so that the quality of the discharged water is ensured to meet the relevant national standard.

The top of reaction tank, flocculation basin, filtering ponds is equipped with overflow mouth 23 respectively, and the bottom of reaction tank, flocculation basin, filtering ponds is equipped with evacuation mouth 24 respectively, all insert appointed collecting pit after all evacuation mouths and overflow mouth assemble, ensure that the equipment safe operation in-process realizes the external zero release of sewage.

The reaction tank 1, the coagulation tank 2, the flocculation tank 3, the clarification tank 4 and the filtration tank 5 are integrated in the tank body to form integrated equipment.

To sum up, the utility model discloses an engineering construction effluent treatment plant can be used to solve adding of current sewage treatment medium use single, be difficult to satisfy different geology of geography, different quality of water yield and different processing requirements scheduling problem. Meanwhile, the treatment device has the characteristics of convenience in operation and management, adoption of automatic control, convenience in installation and maintenance, mobility and the like, and can solve the problems of more construction sites, shortage of technicians, high fixed investment cost and the like.

The above-mentioned embodiments are illustrative and should not be construed as limiting the scope of the invention, which is defined by the appended claims, and all modifications of the equivalent forms of the present invention which are obvious to those skilled in the art after reading the present invention.

Claims (7)

1. The engineering construction wastewater treatment device is characterized by comprising a liquid inlet (22), a reaction tank (1), a coagulation tank (2), a flocculation tank (3), a clarification tank (4), a filter tank (5) and a liquid outlet (34) which are sequentially communicated, wherein a first medium adding opening (25) is formed in the reaction tank (1), and a first stirring mechanism (6) is arranged in the reaction tank (1); a second medium adding port (26) and a first medicament adding port (27) are formed in the coagulation tank (2), and a second stirring mechanism (7) is arranged in the coagulation tank (2); a second medicament adding port (29) is formed in the flocculation tank (3), and a third stirring mechanism (8) is arranged in the flocculation tank (3); the top of depositing reservoir (4) and the top intercommunication of filtering ponds (5), be equipped with filter assembly (33) that are located liquid outlet (34) top in filtering ponds (5), the top of filter assembly (33) is equipped with fourth rabbling mechanism (9) that stretch into in the filtering ponds.

2. The engineering construction wastewater treatment device according to claim 1, wherein the bottom of the reaction tank (1) is communicated with the bottom of the coagulation tank (2); the top of the coagulation tank (2) is communicated with the bottom of the flocculation tank (3); the top of the flocculation tank (3) is communicated with the bottom of the clarification tank (4).

3. The engineering construction wastewater treatment device according to claim 2, characterized in that a first water collecting tank (14) is arranged at the top of the flocculation tank (3), the first water collecting tank (14) is communicated with the flocculation tank (3) through a plurality of grooves and/or holes, and the first water collecting tank (14) is communicated with the clarification tank (4).

4. The engineering construction wastewater treatment device according to any one of claims 1 to 3, wherein a second water collecting tank (16), an inclined plate clarification component (21) and a mud scraping component (18) are sequentially arranged in the clarification tank (4) from top to bottom, the second water collecting tank (16) is communicated with the filtering tank (5), and a mud discharging port (20) is arranged at the bottom of the filtering tank (5).

5. The engineering construction wastewater treatment device according to any one of claims 1 to 3, wherein a guide cylinder (13) with an open top is arranged in the flocculation tank (3), the third stirring mechanism (8) extends into the guide cylinder (13), and the coagulation tank (2) is communicated with the guide cylinder (13).

6. The engineering construction wastewater treatment device according to any one of claims 1 to 3, characterized in that a buffer zone (15) is arranged between the flocculation tank (3) and the clarification tank (4), the top of the buffer zone (15) is communicated with the flocculation tank, and the bottom of the buffer zone is communicated with the clarification tank.

7. The engineering construction wastewater treatment device according to any one of claims 1 to 3, wherein the engineering construction wastewater treatment device comprises a tank body, and the reaction tank (1), the coagulation tank (2), the flocculation tank (3), the clarification tank (4) and the filtration tank (5) are arranged in the tank body.

Images