Wastewater treatment device capable of preventing dead angles

Abstract

The utility model belongs to the field of wastewater treatment, and provides a wastewater treatment device capable of preventing dead angles, which comprises a suction pipe and an injection pipe which are arranged at a coagulating basin and / or a flocculation basin of wastewater treatment equipment, the suction pipe is communicated with an inlet of a slurry pump, and the injection pipe is communicated with an outlet of the slurry pump. The suction pipe comprises a porous pipe I arranged in the coagulating basin and / or the flocculation basin and an external pipe I used for connecting the porous pipe I to the outside of a basin body of the coagulating basin and / or the flocculation basin; the injection pipe comprises a perforated pipe II arranged in the coagulating basin and / or the flocculation basin and an external pipe II used for connecting the perforated pipe II to the outside of a basin body of the coagulating basin and / or the flocculation basin. According to the utility model, no extra equipment is needed, and the problems of sludge deposition and hardening at the bottoms of the tank bodies of the coagulation tank and the flocculation tank, especially at the four corners of the tank bodies can be effectively solved through pipeline transformation by utilizing the existing slurry pump. The equipment does not need to be shut down for dredging, and when the concentration of sludge at the bottom of the pool is too high, pumping and sludge discharging can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to wastewater treatment field, concretely relates to a wastewater treatment device of preventing dead angle. BACKGROUND

[0002] The integrated equipment for tunnel wastewater treatment adopts coagulation sedimentation process, which aims at making the colloid and fine suspended solids in wastewater coagulate into flocculation body by adding coagulant and flocculant to the wastewater, and then removing it. After the equipment is put into use, the following problems are prone to occur in the running process: when the stirring intensity does not meet the requirements, the mixing time of wastewater and reagent is short, the reagent cannot fully react, resulting in the formation of dead angle in the water distribution area, the accumulation of a large amount of floating sludge, and the inability to discharge; at the same time, as the amount of accumulated sludge in the pool body increases, the volume of the pool body gradually decreases, further shortening the reaction time of wastewater and reagent, increasing the burden of the stirrer, causing vicious cycle, resulting in off-specification effluent, and even causing equipment downtime due to excessive sludge accumulation. That is to say, in the prior art, most of the integrated equipment for tunnel wastewater treatment uses square pool which is the most convenient to process, and coagulation pool, flocculation pool and clarification pool are arranged in sequence in the direction of wastewater flow, and stirrers are arranged in the coagulation pool and flocculation pool. Because the stirring space formed by the stirrer is approximately cylindrical, four dead angles are prone to occur at a distance from the side wall of the square pool outside the cylindrical stirring space, and sludge accumulation is caused. The sludge in the dead angle needs to be discharged in time, otherwise it will form a vicious cycle. The existing solution is generally aeration.

[0003] For example, patent CN201720699316.3 relates to a new type of coagulation inclined plate sedimentation tank. The new type of coagulation inclined plate sedimentation tank includes a mixing pool, a flocculation pool, an inclined plate sedimentation tank and an aeration pipe. The bottom of the new type of coagulation inclined plate sedimentation tank is provided with a rotating aeration disc, which rotates continuously to drive the water flow to rotate, so that the reagent and sewage are fully mixed, thus making the dosing effect more significant. The aeration pipe is provided in the settling hopper at the bottom of the inclined plate sedimentation tank, and a plurality of aeration openings are provided on the aeration pipe. The settling hopper area is aerated once every interval, so that the sludge discharge function does not change with the passage of time, and there is no sludge discharge dead angle at the bottom of the settling hopper, ensuring that the sludge is discharged smoothly from the sludge discharge main pipe. In addition, the new type of coagulation inclined plate sedimentation tank has simple and reasonable structure, remarkable purification treatment effect on wastewater, convenient and reliable use, and is suitable for popularization and use.

[0004] In addition, the patent CN202121024821.0 discloses a desulfurization wastewater treatment system, comprising a triple box, a clarifier and a water outlet box connected in sequence; the triple box is divided into a neutralization zone, a sedimentation zone and a flocculation zone by a first partition plate and a second partition plate; a water inlet is arranged at the top of the neutralization zone, and a water outlet is arranged in the middle of the side wall of the flocculation zone, and the water outlet is communicated with the clarifier; stirring shafts are arranged in the neutralization zone, the sedimentation zone and the flocculation zone, and stirring paddles are uniformly arranged on the stirring shafts in the axial direction; a flow disturbing device is further arranged at the corner of the bottom of the neutralization zone, the sedimentation zone and the flocculation zone, the flow disturbing device comprises fixed shafts arranged at the bottoms of the side walls on both sides of the corner respectively, a sleeve rotatable around the fixed shaft is arranged on the fixed shaft, and a soft curtain is arranged on the sleeve; the lowermost stirring paddle is in contact with the soft curtain, and the free end of the stirring paddle is bent; the bottom of the soft curtain is close to the bottom surface of the triple box, the treatment system has low investment, can overcome the stirring dead angle and ensure stable water outlet.

[0005] The method in the first patent is air flushing to prevent dead angle, and the method in the second patent is to arrange a soft curtain to swing to prevent dead angle, however, both the methods are prone to disturb the flocs in the coagulation tank and the flocculation tank, and the flocs are easily blown away; and the method of arranging a soft curtain to swing to prevent dead angle is also prone to increase the energy consumption and equipment investment in the coagulation tank and the flocculation tank.

[0006] Therefore, there is a need for a new wastewater treatment device for preventing dead angle in the field. Content of the utility model

[0007] Therefore, the utility model provides a wastewater treatment device for preventing dead angle, comprising a suction pipe (36) and a jet pipe (37) arranged at a coagulation tank (31) and / or a flocculation tank (32) of a wastewater treatment device, the suction pipe (36) is communicated with the inlet of a slurry pump (34), the jet pipe (37) is communicated with the outlet of the slurry pump (34), the suction pipe (36) comprises a perforated pipe one (361) arranged in the coagulation tank and / or the flocculation tank and an external connecting pipe one (362) for connecting the perforated pipe one to the outside of the tank body of the coagulation tank and / or the flocculation tank, and the jet pipe (37) comprises a perforated pipe two (371) arranged in the coagulation tank and / or the flocculation tank and an external connecting pipe two (372) for connecting the perforated pipe two to the outside of the tank body of the coagulation tank and / or the flocculation tank.

[0008] In a specific embodiment, the first external pipe (362) is connected to a pipeline access point arranged on a pipeline between a switch valve at the bottom of a clarifier (33) of a wastewater treatment device and an inlet of a sludge pump (34), and a second valve (39) is arranged on the first external pipe (362); the second external pipe (372) is connected to a pipeline exit point arranged on a pipeline between an outlet of the sludge pump (34) and a switch valve downstream thereof, and a first valve (38) is arranged on the second external pipe (372).

[0009] In a specific embodiment, the first valve (38) and the second valve (39) are both adjustable flow regulating valves and are both electrically connected to a controller so that automatic switching and flow adjustment of the valves can be realized.

[0010] In a specific embodiment, the first perforated pipe (361) is square or consistent with the shape of the coagulation tank (31) and / or the flocculation tank (32), is arranged at a height of 0.4-0.8 m from the bottom of the tank, and is provided with a plurality of suction holes on the pipe body; the second perforated pipe (371) is square or consistent with the shape of the coagulation tank (31) and / or the flocculation tank (32), is arranged at a height of 0.1-0.3 m from the bottom of the tank, and is provided with a plurality of water outlet holes on the pipe body.

[0011] In a specific embodiment, the suction holes and the water outlet holes are arranged on the side or the lower side of the pipe body, and the diameter of the suction holes is larger than that of the water outlet holes, and the suction holes and the water outlet holes are uniformly distributed on the pipe body of the first perforated pipe (361) and the second perforated pipe (371), respectively.

[0012] In the present application, the suction holes and the water outlet holes are arranged on the side or the lower side of the pipe body, which can effectively prevent the deposited sludge at the bottom from entering the pipeline and keep the pipeline unobstructed.

[0013] In a specific embodiment, the diameter of the suction holes is 10-20 mm, the diameter of the water outlet holes is 3-8 mm, the suction holes and the water outlet holes are arranged at a position 30-60° below the side of the pipe body, the water outlet holes of the second perforated pipe (371) all face the tank walls around the center of the tank, and the distance between the two holes of the suction holes and the water outlet holes is 5-20 cm.

[0014] The present application has at least the following beneficial effects:

[0015] 1. Without additional equipment, the existing sludge pump is used to effectively solve the problem of sludge deposition and hardening at the bottom of the coagulation tank and the flocculation tank, especially at the four corners of the tank.

[0016] 2. The integrated device does not have to be stopped for dredging, and when the sludge concentration of the pool bottom of the coagulation pool and flocculation pool is too high, the valve two can be opened and the valve one can be closed to realize pumping of sludge.

[0017] 3. The adjusting valves are additionally arranged on the pipeline of the suction pipe and the jet pipe, that is, the valve one and the valve two are adjustable valves, the flow of the sludge pump can be adjusted by controlling the opening degree of the valve according to the sludge setting condition and the stirring flocculation condition, and the flocculation formation in the pool is not affected while the deposited sludge is disturbed.

[0018] 4. The perforated pipe of the suction pipe communicated with the sludge pump is arranged at a position 600 mm above the pool bottom, and the suction hole with a diameter of φ15 mm is obliquely arranged downward at a 45° direction of the pipeline, and the hole direction is downward, so that the pipeline is prevented from being blocked by sludge entering the pipeline.

[0019] 5. The perforated pipe of the jet pipe communicated with the sludge pump is arranged at a position 200 mm above the pool bottom, and the water outlet hole with a diameter of φ5 mm is obliquely arranged downward at a 45° direction of the pipeline, and the hole direction is downward, so that the pipeline is prevented from being blocked by sludge entering the pipeline, and the pressure in the pipeline is formed, the sludge setting on the pool bottom is disturbed by the jetting action of the water flow, the sludge setting on the pool bottom is dispersed, and the sludge settlement problem in the pool body is completely solved.

[0020] 6. The device can ensure stable operation of the whole system, has low cost and remarkable effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an overall structural view of the dead angle preventing wastewater treatment device.

[0022] Figure 2 It is a partial three-dimensional structural view of the dead angle preventing wastewater treatment device.

[0023] In the figure, 31 is a coagulation pool, 311 is a coagulation pool stirrer, 32 is a flocculation pool, 321 is a flocculation pool stirrer, 322 is a stirrer support, 33 is a clarifier, 34 is a sludge pump, 35 is a backflow pump, 36 is a suction pipe, 361 is a perforated pipe one, 362 is an external connecting pipe one, 37 is a jet pipe, 371 is a perforated pipe two, 372 is an external connecting pipe two, 38 is a valve one, and 39 is a valve two. DETAILED DESCRIPTION

[0024] As Figure 1 and Figure 2As shown, the utility model discloses a first increase two pipelines, one suction pipe and one injection pipe, two pipelines are all set into integral square according to pool wall shape, the liquid in coagulation tank and flocculation tank continuously sucks and flows out pool body and injects into pool body and reaches the effect of eliminating dead angle, suction pipe in the drawing is on, it is inclined downward and opens the hole to make liquid suction flow into the pipeline, and injection pipe is below, and it is also inclined downward and opens the hole to make liquid flow out from the pipeline, and suction pipe and injection pipe are all inclined downward and open the hole to avoid the accumulation of liquid in the pipeline, the flow of liquid in suction pipe and injection pipe can be realized by using the existing slurry pump in the integrated equipment for tunnel wastewater treatment, thereby preventing the appearance of dead angle and sludge accumulation in coagulation tank and flocculation tank.

[0025] The utility model discloses a utilization existing slurry pump, reformation pipeline. Set up two layers of pipeline in the pool body of coagulation tank, flocculation tank, upper layer pipeline is suction pipe, it is connected with the import of existing slurry pump, lower layer pipeline is injection pipe, it is connected with the export of slurry pump, and the sludge of pool bottom that forms jet flow by the suction of slurry pump disperses, and set up valve one on the pipeline (that is external connection pipe two) of the hole pipe communication of export of slurry pump and injection pipe, set up valve two on external connection pipe one, when opening valve two and closing valve one, can also draw the mud water in coagulation tank and flocculation tank to sludge pool, can effectively avoid the sludge accumulation of coagulation tank, flocculation tank pool bottom to form dead angle on one side, can also discharge the sludge of pool bottom in addition.

[0026] In the prior art, the functions of the slurry pump 34 and the backflow pump 35 are originally the same, and the two pumps are standby for each other and can be switched with each other. The slurry pump 34 and the backflow pump 35 originally both realize the functions of sludge backflow and sludge discharge, part of the sludge in the clarification tank 33 is discharged to a sludge tank outside the integrated equipment through a device sludge discharge channel, and another part of the sludge in the clarification tank 33 is backflowed to the flocculation tank through a backflow channel. However, in the utility model, because the slurry pump 34 is reformed in pipeline and a valve is additionally arranged, compared with the backflow pump 35, the original function of backflowing and discharging the sludge at the bottom of the clarification tank 33 is unchanged, but two functions are added. One function is that when the valve one 38 and the valve two 39 are both opened, the liquid injection in the coagulation tank 31 and the flocculation tank 32 can prevent dead angle. The other function is that when the valve one 38 is closed and the valve two 39 is opened, the excess sludge in the coagulation tank 31 and the flocculation tank 32 can be partially backflowed to the flocculation tank through the slurry pump 34, and part of the sludge is discharged to a sludge tank outside the integrated equipment through a device sludge discharge channel.

[0027] The suction pipe and the injection pipe each comprise a perforated pipe arranged in the coagulation tank and the flocculation tank and an external connecting pipe for connecting the perforated pipe outside the tank body, the perforated pipe is uniformly provided with φ5-15mm holes at a 45° angle downwardly and at a 100mm interval, the injection water flow is formed by the pressure of the slurry pump, the holes are arranged on the lower side of the pipe, which can effectively avoid the settlement sludge from entering the pipe and ensure that the inlet and outlet of the slurry pump are not blocked.

[0028] In general, the utility model provides a kind of dead angle prevention wastewater treatment device, including the suction pipe and the injection pipe being arranged at the coagulation tank and / or flocculation tank of wastewater treatment equipment, the suction pipe is communicated with the inlet of slurry pump, the injection pipe is communicated with the outlet of slurry pump, the suction pipe includes the perforated pipe one being arranged in coagulation tank and / or flocculation tank and the external connecting pipe one for connecting the perforated pipe one outside the tank body of coagulation tank and / or flocculation tank, the injection pipe includes the perforated pipe two being arranged in coagulation tank and / or flocculation tank and the external connecting pipe two for connecting the perforated pipe two outside the tank body of coagulation tank and / or flocculation tank.The utility model does not need to additionally increase equipment, utilizes existing slurry pump, and can effectively solve the sludge deposition and hardening problem of the tank body bottom of coagulation tank and flocculation tank especially the four corners of tank body by pipeline modification.Equipment does not have to stop and dredge, when the sludge concentration of tank bottom is too high, sludge pumping can be realized.

[0029] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A dead angle preventing wastewater treatment device, characterized by, The invention relates to a wastewater treatment device, comprising a suction pipe (36) and a jet pipe (37) arranged at a coagulation tank (31) and / or a flocculation tank (32) of the wastewater treatment device, the suction pipe (36) being in communication with an inlet of a slurry pump (34), the jet pipe (37) being in communication with an outlet of the slurry pump (34), the suction pipe (36) comprising a perforated pipe (361) arranged in the coagulation tank and / or the flocculation tank and an external connecting pipe (362) for connecting the perforated pipe (361) outside the tank body of the coagulation tank and / or the flocculation tank, the jet pipe (37) comprising a perforated pipe (371) arranged in the coagulation tank and / or the flocculation tank and an external connecting pipe (372) for connecting the perforated pipe (371) outside the tank body of the coagulation tank and / or the flocculation tank.

2. The dead angle free wastewater treatment device according to claim 1, characterized by The external connecting pipe (362) is connected to a pipeline access point arranged on a pipeline between a switch valve at the bottom of a clarifier (33) of the wastewater treatment device and an inlet of the slurry pump (34), and a valve (39) is arranged on the external connecting pipe (362); the external connecting pipe (372) is connected to a pipeline exit point arranged on a pipeline between an outlet of the slurry pump (34) and a switch valve downstream thereof, and a valve (38) is arranged on the external connecting pipe (372).

3. The dead angle free wastewater treatment device according to claim 2, characterized by The valve (38) and the valve (39) are both flow-adjustable regulating valves and are both electrically connected to a controller so as to realize automatic switching and flow adjustment of the valves.

4. The dead angle free wastewater treatment device according to any one of claims 1 to 3, characterized in that The perforated pipe (361) is square or consistent with the shape of the coagulation tank (31) and / or the flocculation tank (32), is arranged at a height of 0.4-0.8 m from the bottom of the tank, and is provided with a plurality of suction holes on the pipe body; the perforated pipe (371) is square or consistent with the shape of the coagulation tank (31) and / or the flocculation tank (32), is arranged at a height of 0.1-0.3 m from the bottom of the tank, and is provided with a plurality of water outlet holes on the pipe body.

5. The dead angle free wastewater treatment device according to claim 4, characterized by The suction holes and the water outlet holes are both arranged on the side or the lower side of the pipe body, and the diameter of the suction holes is larger than that of the water outlet holes, and the suction holes and the water outlet holes are uniformly distributed on the pipe body of the perforated pipe (361) and the perforated pipe (371) respectively.

6. The dead angle free wastewater treatment device according to claim 5, characterized by The diameter of the suction holes is 10-20 mm, and the diameter of the water outlet holes is 3-8 mm, the suction holes and the water outlet holes are arranged at a position of 30-60° below the side of the pipe body, and the water outlet holes of the perforated pipe (371) all face the tank walls around the tank rather than the center of the tank, and the distance between the two holes of the suction holes and the water outlet holes is 5-20 cm.

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