Shield wastewater treatment device

Abstract

The utility model relates to a shield waste water treatment device, which belongs to the technical field of shield waste water treatment and comprises a waste water collection tank, a lifting pump, an inclined plate sedimentation tank, a spore transfer all-in-one machine, a mud collection tank and a latticed water storage tank, a partition wall for dividing the partitioned water storage tank into a water return area and a tap water area is arranged in the middle of the partitioned water storage tank; an inlet and an outlet of the lifting pump are respectively communicated with a water outlet of the wastewater collection tank and a water inlet of the inclined plate sedimentation tank through pipelines; a clear water outlet of the inclined plate sedimentation tank is communicated with a water inlet of the spore transfer all-in-one machine through a pipeline; a sludge discharge port of the inclined plate sedimentation tank is communicated to a sludge collecting tank through a pipeline; a clear water outlet of the spore transfer all-in-one machine is communicated to a water return area of the latticed water storage tank; the shield waste water treatment device can quickly treat shield waste water, shortens the treatment time of the shield waste water, and achieves the recycling standard.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the shield wastewater treatment technical field, specifically relates to a shield wastewater treatment device. BACKGROUND

[0002] In shield construction, water consumption is large, and water is mainly concentrated in the following aspects: (1) various soil layers are encountered in the shield construction process, in order to reduce cutter wear, avoid mud cake formation and ensure smooth discharge of the screw conveyor, a large amount of water is needed to mix with additives and inject into the excavation face, the shield machine soil bin and the screw conveyor to improve the spoil; (2) in order to ensure the normal operation of the equipment, water is needed to cool the equipment parts; (3) in the shield construction process, some spoil, mud and other impurities are attached to the tunnel wall, in order to ensure the quality of the tunnel, the tunnel wall needs to be washed regularly, which results in a large amount of tap water compensation in shield construction, and a large amount of tap water replenishment means high water fee expenditure, which directly increases the cost of shield construction. Especially in some water resource shortage areas, water fee may be higher, further increasing the construction cost; in addition, in order to meet the demand of tap water replenishment, corresponding water supply pipeline and facilities also need to be constructed, which also increases the investment of the project.

[0003] If shield return water is recycled, water consumption in shield construction can be effectively reduced, but due to the characteristics of shield wastewater, such as large fluctuation of water quantity and water quality and a large amount of small particle size soil in water, the existing shield wastewater treatment equipment can meet the recycling requirements after treatment, but the problem is that the treatment time is long, and if the return water is treated until it can be used for construction again, the construction progress will be seriously affected, which is obviously not allowed in engineering construction, therefore, it is necessary to provide a device that can quickly treat shield wastewater to meet the standard, which can greatly save the water consumption of shield construction. SUMMARY

[0004] In order to overcome the problems in the background art, the utility model provides a shield wastewater treatment device, which can quickly treat shield wastewater, shorten the treatment time of shield wastewater and meet the recycling standard.

[0005] To achieve the above purpose, the utility model is realized by the following technical schemes:

[0006] The shield wastewater treatment device comprises a wastewater collecting pool, a lifting pump, an inclined plate sedimentation tank, a spore transfer integrated machine, a sludge collecting pool and a divided storage pool; a partition wall is arranged in the middle of the divided storage pool to divide the divided storage pool into a backwater area and a tap water area; the inlet and outlet of the lifting pump are communicated with the outlet of the wastewater collecting pool and the water inlet of the inclined plate sedimentation tank through pipelines; the clean water outlet of the inclined plate sedimentation tank is communicated with the water inlet of the spore transfer integrated machine through a pipeline; the sludge outlet of the inclined plate sedimentation tank is communicated with the sludge collecting pool through a pipeline; and the clean water outlet of the spore transfer integrated machine is communicated with the backwater area of the divided storage pool.

[0007] Preferably, the shield wastewater treatment device further comprises a polyaluminum chloride storage tank and a polyacrylamide storage tank; the polyaluminum chloride storage tank is communicated with the wastewater collecting pool through a feeding pump; a stirring paddle is arranged in the wastewater collecting pool; a venturi pipe is arranged on the outlet pipe of the lifting pump; and the polyacrylamide storage tank is communicated with the throat pipe section of the venturi pipe through a pipeline.

[0008] Preferably, the divided storage pool is provided with a backwater conveying pump and a tap water conveying pump; the inlet of the backwater conveying pump is communicated with the backwater area; the inlet of the tap water conveying pump is communicated with the tap water area; and the backwater conveying pump and the tap water conveying pump share one outlet pipe.

[0009] Preferably, the bottom of the wastewater collecting pool is provided with a sludge outlet, and the sludge outlet is communicated with the sludge collecting pool through a pipeline.

[0010] Preferably, the spore transfer integrated machine is divided into a water inlet area, a sludge discharge area and a clean water area; the clean water outlet of the spore transfer integrated machine is arranged in the clean water area; the sludge discharge area is communicated with the sludge collecting pool through a pipeline; and the water inlet of the spore transfer integrated machine is arranged in the water inlet area.

[0011] The shield wastewater treatment device has the following beneficial effects:

[0012] According to the characteristics that the main impurities in the shield wastewater are fine soil, the polyaluminum chloride and the polyacrylamide are added into the shield wastewater, the shield wastewater is sent to the spore transfer integrated machine after preliminary precipitation in the inclined plate sedimentation tank, the structure of the spore transfer integrated machine is utilized to realize the rapid precipitation of the solid phase in the shield wastewater, the spore transfer integrated machine is used in the treatment of the shield wastewater for the first time, the test proves that the spore transfer integrated machine is more beneficial to the precipitation of the slurry, can accelerate the precipitation speed of the slurry, accelerate the treatment speed of the shield wastewater, and makes the treated backwater be able to be used as water supply for the shield construction in time.

[0013] The utility model provides a venturi tube at the outlet of the lifting pump, and utilizes the venturi tube to realize automatic feeding of polyacrylamide and mixing with sewage, thereby saving equipment investment and reducing the equipment footprint. The venturi tube is provided between the wastewater collection tank and the inclined plate sedimentation tank, so that the shield wastewater is first mixed with polyaluminum chloride and then mixed with polyacrylamide, and then enters the inclined plate sedimentation tank to start sedimentation, so that the mixing of polyacrylamide and wastewater is completed in the process of wastewater being transported by the lifting pump. Compared with the structure that needs to set up a wastewater and polyacrylamide premixing device separately, the utility model not only saves equipment investment, but also shortens the wastewater treatment process and shortens the wastewater treatment time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] In the figure, 1-wastewater collection tank, 2-lifting pump, 3-inclined plate sedimentation tank, 4-spore transfer integrated machine, 5-sludge collection tank, 6-grid water storage tank, 7-partition wall, 8-venturi tube, 9-polyaluminum chloride storage tank, 10-polyacrylamide storage tank, 11-feeding pump, 12-return water delivery pump, 13-tap water delivery pump, 14-water inlet area, 15-slag discharge area, 16-clean water area, 17-connecting pipe, 18 water inlet baffle, 19-first guide plate, 20-spore generator, 21-spore stabilizer, 22-releaser, 23-separation partition, 24-slag discharge trough and 25-slag scraper. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to facilitate understanding by technicians.

[0017] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "provided with" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0018] like Figure 1 As shown, the shield wastewater treatment device includes a wastewater collection tank 1, a lifting pump 2, an inclined plate sedimentation tank 3, a spore transfer integrated machine 4, a mud collection tank 5, a polyaluminum chloride storage tank 9, a polyacrylamide storage tank 10 and a compartmentalized water storage tank 6.

[0019] The partitioned water storage tank 6 is provided with a partition wall 7 to divide it into a backwater area and a tap water area. The backwater area is used to store backwater treated by the utility model, and the tap water area is used to supplement tap water. The shield cannot meet the water consumption requirement only by using backwater, so the tap water area is provided to meet the water supply requirement of shield construction. The backwater area is supplied with water by a backwater delivery pump 12, and the tap water area is supplied with water by a tap water delivery pump 13. The backwater treated by the utility model can meet the water index requirement of shield construction. Therefore, the backwater delivery pump 12 and the tap water delivery pump 13 share one outlet pipe. According to the water quantity, backwater is used as much as possible, and tap water is used when the backwater supply is insufficient. The backwater area and the tap water area are respectively provided with delivery pumps, so that the backwater area can be maintained or backwater can be used or tap water can be used according to the situation and the construction requirement when the backwater is out of standard or other situations. As a preferred scheme, a communication pipe is arranged to communicate the backwater area and the tap water area, and a valve is arranged on the pipe. According to the backwater treatment condition and the shield construction condition, the valve on the communication pipe of the backwater area and the tap water area is selected to be opened or not. When the valve is opened, the backwater delivery pump 12 and the tap water delivery pump 13 are used alternately. In order to facilitate operation, the communication pipe is arranged on the outside of the partitioned water storage tank 6, so that the valve can be closed conveniently.

[0020] The lifting pump 2 is arranged between the wastewater collecting tank 1 and the inclined plate sedimentation tank 3, and the wastewater in the wastewater collecting tank 1 is delivered to the inclined plate sedimentation tank 3 by the lifting pump 2.

[0021] The wastewater collecting pool 1 can adjust the water quantity and quality to a certain extent due to the fluctuation of the water quality and quantity of the shield construction wastewater. The wastewater collecting pool 1 is provided with a polyaluminum chloride storage tank 9, the polyaluminum chloride storage tank 9 is connected to the wastewater collecting pool 1 through a feeding pump 11, and the polyaluminum chloride is added into the wastewater collecting pool 1. The wastewater collecting pool 1 is provided with a stirring paddle, the stirring paddle is a push flow stirrer made of stamping carbon steel, and the wastewater and the polyaluminum chloride are fully mixed through the stirring paddle to make the small particle slurry coagulate. The horizontal pipe section of the outlet pipe of the lifting pump 2 is connected with a venturi tube 8, and a polyacrylamide storage tank 10 is connected to the throat section of the venturi tube 8 through a pipeline. The polyacrylamide storage tank 10 is connected to the venturi tube 8, the principle of the smaller pressure of the throat section of the venturi tube 8 is used, the flocculating agent in the polyacrylamide storage tank 10 is sucked into the outlet pipe of the lifting pump 2 under the action of negative pressure, and the diffusion principle of the venturi tube 8 is used, so that the flocculating agent is fully mixed with the sewage after entering the throat section, and the flocculating agent and the shield wastewater can be fully mixed without additionally setting a conveying agent pump and a stirring paddle. Due to the need for less equipment area during the shield construction process, before the venturi tube is used, a flocculating agent premixing tank is additionally arranged to mix the polyacrylamide with the water conveyed from the wastewater collecting pool 1 and then send the water into the inclined plate sedimentation tank 3, so that the wastewater and the polyacrylamide are fully mixed and then precipitated, and the flocculating agent premixing tank is directly not used by arranging the venturi tube 8 at the outlet of the lifting pump 2, so that the equipment area is reduced, the equipment investment is saved, and the flocculating agent can be timely precipitated in the inclined plate sedimentation tank 3 after being mixed with the wastewater through the venturi tube 8, the flocculating and precipitating time is shortened without changing the adding process of the agent of the wastewater (the polyaluminum chloride is fully mixed with the wastewater, and the polyacrylamide is fully mixed with the wastewater).

[0022] The spore transfer all-in-one machine 4 is divided into a water inlet area 14, a residue discharge area 15 and a clean water area 16; the clean water outlet of the inclined plate sedimentation tank 3 is connected to the water inlet area of the spore transfer all-in-one machine 4 through a pipeline, the clean water outlet of the spore transfer all-in-one machine 4 is arranged in the clean water area 16 and connected to the backwater area of the divided tank water storage pool 6 through a pipeline; and the residue discharge area 15 is connected to the sludge collecting tank 5 through a pipeline.

[0023] The spore transfer integrated machine is of the existing structure, and is internally provided with a water inlet baffle 18, a first flow guide plate 19, a spore generator 20, a spore stabilizer 21, a release device 22, a separation partition plate 23, a residue discharge groove 24 and a residue scraping machine 25; the spore generator 20, the spore stabilizer 21 and the release device 22 are sequentially connected through pipelines, and the release device 22 is arranged between the water inlet baffle 18 and the first flow guide plate 19. The structure and working principle thereof are the same as those of patent CN218261996U, and the structure of the spore transfer integrated machine 4 will not be described herein. It should be noted that the spore transfer integrated machine 4 is used in the treatment of shield wastewater for the first time, and practical use proves that the spore transfer integrated machine 4 is particularly suitable for the treatment of shield wastewater in which solid-phase substances are mainly mud, greatly accelerates the sedimentation rate of wastewater and shortens the wastewater treatment time. Taking shield wastewater with a daily treatment capacity of about 2000m³ / d as an example, when the spore transfer integrated machine is used, two series-connected inclined plate sedimentation tanks with the same volume are used, and after one inclined plate sedimentation tank is replaced by the spore transfer integrated machine with the same volume, the daily treatment capacity reaches 3600m³ / d, the water quality is more stable, the treatment time of shield wastewater is greatly shortened, and the treated shield wastewater can be used as shield water supply.

[0024] The utility model discloses a first add the precipitant polyaluminium chloride in the wastewater collection pool 1, and make flocculating agent polyacrylamide mix with wastewater through the venturi tube 8 on the outlet pipe of the lift pump, make full use of the characteristics that need to add precipitant first, then add flocculating agent, and need flocculating agent and wastewater to precipitate after mixing fully in the wastewater treatment process, the whole treatment flow is coherent, and the whole treatment flow is smooth, not only save wastewater treatment equipment, but also guarantee the wastewater treatment flow, and shorten the wastewater treatment time, the utility model shortens the treatment time of shield wastewater, makes the backwater can use in time, and saves the tap water supplementing amount.

[0025] All mud of the utility model, including the bottom mud of the wastewater collection pool 1 and the inclined plate sedimentation tank 3, the mud of the spore transfer integrated machine 4 is uniformly discharged to the mud collecting pool 5, after the mud after collection is separated by using the plate and frame filter press or other methods, the clear water is returned to the wastewater collection pool 1 and is treated circularly.

[0026] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the utility model and not to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to the form and details without departing from the scope defined in the claims of the utility model.

Claims

1. A shield wastewater treatment device, characterized by, It includes waste water collection tank (1), lifting pump (2), inclined plate sedimentation tank (3), spore transfer integrated machine (4), mud collecting tank (5) and compartmented water storage tank (6); the compartmented water storage tank (6) is provided with a partition wall (7) in the middle, which divides it into a backwater area and a tap water area; the inlet and outlet of the lifting pump (2) are respectively communicated with the water outlet of the waste water collection tank (1) and the water inlet of the inclined plate sedimentation tank (3) through pipelines; the clean water outlet of the inclined plate sedimentation tank (3) is communicated with the water inlet of the spore transfer integrated machine (4) through a pipeline; the sludge discharge port of the inclined plate sedimentation tank (3) is communicated to the mud collecting tank (5) through a pipeline; the clean water outlet of the spore transfer integrated machine (4) is communicated to the backwater area of the compartmented water storage tank (6).

2. The shielded wastewater treatment device of claim 1, wherein, It also includes polyaluminum chloride storage tank (9) and polyacrylamide storage tank (10); the polyaluminum chloride storage tank (9) is communicated to the waste water collection tank (1) through a feeding pump (11); the waste water collection tank (1) is provided with a stirring paddle; the outlet pipe of the lifting pump (2) is provided with a venturi tube (8); the polyacrylamide storage tank (10) is communicated with the throat pipe section of the venturi tube (8) through a pipeline.

3. The shielded wastewater treatment device according to claim 1 or 2, characterized in that The compartmented water storage tank (6) is provided with a backwater delivery pump (12) and a tap water delivery pump (13); the inlet of the backwater delivery pump (12) is communicated with the backwater area; the inlet of the tap water delivery pump (13) is communicated with the tap water area; the backwater delivery pump (12) and the tap water delivery pump (13) share an outlet pipe.

4. The shielded wastewater treatment device of claim 1, wherein, The bottom of the waste water collection tank (1) is provided with a sludge discharge port, which is communicated to the mud collecting tank (5) through a pipeline.

5. The shielded wastewater treatment device of claim 1, wherein, The spore transfer integrated machine (4) is divided into a water inlet area (14), a sludge discharge area (15) and a clean water area (16); the clean water outlet of the spore transfer integrated machine (4) is arranged in the clean water area (16); the sludge discharge area (15) is communicated to the mud collecting tank (5) through a pipeline; the water inlet of the spore transfer integrated machine (4) is arranged in the water inlet area (14).

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