Vertical flow flocculation and sedimentation coupling tank

Abstract

The invention relates to the technical field of water treatment, in particular to a vertical flow flocculent precipitation coupling tank which comprises a coupling tank body and a structural member, the lower end of the coupling tank body is fixedly connected with a sludge collecting hopper; sludge discharge pipes are arranged at the lower ends of the sludge collecting hoppers; a water inlet pipe extending into the coupling tank body is mounted at the left end of the coupling tank body; a water collecting tank is mounted at the upper end of the coupling pool body; a water outlet pipe is mounted at the right lower end of the water collecting tank; a structural member is mounted in the middle inside the coupling tank body; through four different structural forms, flocculants are further fully mixed and reacted, a very good flocculation effect is achieved, turbulent flow is locally generated in a water body under the condition that the original precipitation state is not influenced, so that flocculation reaction is locally generated again in a precipitation tank, and the flocculation effect is greatly improved on the basis that precipitated solid particles are not disturbed. And the small-particle solids and suspended solids are collided and combined again to form large solid particles, so that the solid removal rate of the sedimentation tank is improved, and the effluent quality of the sedimentation tank is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, in particular to a vertical flow flocculation sedimentation coupling tank. Background Art

[0002] Flocculation sedimentation treatment refers to the water treatment process of adding flocculants to water to cause suspended particles in the water to coagulate and precipitate. After the coagulant is added to the water, the colloids and dispersed particles in the suspended matter collide with each other and coagulate to form flocs due to the effect of molecular attraction. During the sedimentation process, the size and mass of the flocs continue to increase, and the sinking rate increases with depth.

[0003] The existing sedimentation tank types for water treatment mainly include horizontal flow sedimentation tank and inclined tube / inclined plate sedimentation tank. Their common feature is that they provide a stable laminar flow form to the water flow entering the sedimentation tank and utilize the gravity of particles in the water to achieve solid-liquid separation. However, they have a common disadvantage, that is, the flocculation reaction is basically completed in the flocculation tank, and flocculation reaction no longer occurs in the sedimentation tank. Therefore, smaller solid particles may be in a suspended state and cannot be removed by gravity.

[0004] Therefore, in order to solve the problem that flocculation reaction no longer occurs in the above-mentioned sedimentation tank and solids with smaller particles cannot be removed by gravity, a vertical flow flocculation and sedimentation coupling tank can be designed. Summary of the invention

[0005] To overcome the problem that flocculation no longer occurs in the sedimentation tank, solids with smaller particles cannot be removed by gravity.

[0006] The technical solution of the present invention is: a vertical flow flocculation sedimentation coupling tank, comprising a coupling tank body and structural parts; a mud collecting bucket is fixedly connected to the lower end of the coupling tank body; a mud discharge pipe is arranged at the lower end of the mud collecting bucket; an inlet pipe extending into the coupling tank body is installed at the left end of the coupling tank body; a water collecting trough is installed at the upper end of the coupling tank body; a water outlet pipe is installed at the lower right end of the water collecting trough; and a structural part is installed at the middle part of the inner side of the coupling tank body.

[0007] Preferably, the water to be treated enters the coupling tank body from the water inlet pipe. No matter whether the structural parts adopt inclined plates / inclined tubes, straight tubes, folded plates or variable flow folded plates, they have a good precipitation effect on alum flocs, and the hydraulic conditions in the coupling tank body are adjusted by the structural parts, the flow velocity gradient in the coupling tank body is improved, and secondary flocculation is formed in the coupling tank body. The reaction flocculant is further stirred and mixed by the structural parts in the coupling tank body to achieve a good flocculation effect, further reducing the turbidity of the outlet water, and the sludge is settled at the bottom of the sludge collecting hopper and then discharged through the sludge discharge pipe. As the water level rises, the treated water is discharged from the sump through the outlet pipe.

[0008] Preferably, the structural member is an inclined plate or an inclined tube, and the material is stainless steel, PE, PVC, ethylene-propylene copolymer, polypropylene or polyvinyl chloride.

[0009] Preferably, the structural member is a straight pipe made of stainless steel, PE, PVC, ethylene-propylene copolymer, polypropylene or polyvinyl chloride.

[0010] Preferably, the structural member is a folded plate made of stainless steel, PE, PVC, ethylene-propylene copolymer, polypropylene or polyvinyl chloride.

[0011] Preferably, the structural member is a flow-changing folding plate made of stainless steel, PE, PVC, ethylene-propylene copolymer, polypropylene or polyvinyl chloride.

[0012] Preferably, the vertical flow flocculation sedimentation coupling tank is automatically controlled by a PLC control system.

[0013] Preferably, the outer surface of the portion of the water inlet pipe extending into the coupling tank body is provided with equidistantly distributed water outlets.

[0014] Preferably, the sludge collecting hopper is designed according to the structure of the sludge thickening tank.

[0015] The vertical flow flocculation sedimentation coupling tank is used in high turbidity water treatment, water purification in water supply and drainage systems, and in large, medium and small water plants.

[0016] The beneficial effects of the present invention are as follows: by filling inclined plates / inclined tubes, straight tubes, folded plates or variable flow folded plates, four different structural forms of the device are realized, so that the flocculant can be further fully mixed and reacted to achieve a good flocculation effect. The water plant can reduce the dosage of the flocculant, shorten the sedimentation distance, and reduce the sedimentation time, so that the sedimentation separation zone maintains a high rising flow rate, and the area occupied by the sedimentation device system is reduced. The hydraulic conditions of the device are adjusted, the internal flow velocity gradient is improved, and secondary flocculation is formed in the device. The internal folded plates or variable flow folded plates are used to further stir and mix the reaction flocculants to achieve a good flocculation effect, further reduce the turbidity of the effluent, improve the effluent quality of the water plant and keep the water quality stable. The inclined plates / inclined tubes, straight tubes, folded plates and variable flow folded plates have a good sedimentation effect on alum flocs, which increases the operating load of the device. The sludge collecting hopper is designed according to the structure of the sludge concentration tank, which can greatly improve the concentration effect of the sludge. The discharged sludge can be directly dehydrated. The sludge collecting hopper and the sludge discharge pipe are installed at the bottom to collect and discharge For the sludge settled in the device, the water purification system does not need to stop running when discharging the sludge. On the basis of the original laminar flow form of the sedimentation tank water flow, a device is added to make the water body locally turbulent without affecting the original sedimentation state, so as to produce flocculation reaction again in the sedimentation tank. Its purpose is to make the smaller solid particles and suspended matter collide and combine again to form large solid particles without disturbing the solid particles that have been precipitated, thereby improving the solid removal rate of the sedimentation tank and further improving the effluent water quality of the sedimentation tank. A vertical flow flocculation and sedimentation coupling tank is set after the flocculation reaction tank, which can not only make the coagulant further fully mix and react, but also further improve the sedimentation effect through the coupling effect of flocculation and sedimentation, so as to meet the turbidity index requirements of the water plant effluent. It has the advantages of simple structure, small footprint, high efficiency, high degree of automation, easy installation and use, stable operation, safety and reliability, strong adaptability, large impact load resistance, and can adapt to the treatment process requirements of different water qualities. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 What is shown is a schematic diagram of the planar structure of a vertical flow inclined plate or inclined tube flocculation sedimentation coupling tank according to Example 1 of the present invention;

[0018] Figure 2 Shown is a schematic diagram of the planar structure of a vertical flow straight tube flocculation sedimentation coupling tank according to Example 2 of the present invention;

[0019] Figure 3 Shown is a schematic diagram of the planar structure of the vertical flow baffle flocculation sedimentation coupling tank of Example 3 of the present invention;

[0020] Figure 4 Shown is a schematic diagram of the planar structure of the vertical rheological flow folded plate flocculation sedimentation coupling tank of Example 4 of the present invention.

[0021] Explanation of the reference numerals: 1. coupling tank body; 11. structural member; 12. water inlet pipe; 13. water outlet pipe; 14. water collecting trough; 15. mud collecting bucket; 16. mud discharge pipe. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] Example 1: Vertical flow inclined plate or inclined tube flocculation sedimentation coupling tank

[0024] See also Figure 1 The present invention provides an embodiment: a vertical flow flocculation sedimentation coupling tank, comprising a coupling tank body 1 and a structural member 11; a mud collecting bucket 15 is fixedly connected to the lower end of the coupling tank body 1; a mud discharge pipe 16 is arranged at the lower end of the mud collecting bucket 15; an inlet pipe 12 extending into the coupling tank body 1 is installed at the left end of the coupling tank body 1; a water collecting trough 14 is installed at the upper end of the coupling tank body 1; an outlet pipe 13 is installed at the lower right end of the water collecting trough 14; a structural member 11 is installed at the middle part of the inner side of the coupling tank body 1, and the structural member 11 adopts an inclined plate or an inclined tube.

[0025] During operation, the water to be treated enters the coupling tank body 1 from the water inlet pipe 12. The structural member 11 adopts an inclined plate / inclined tube, which has a good precipitation effect on alum flocs. The hydraulic conditions in the coupling tank body 1 are adjusted by the structural member 11, and the flow velocity gradient in the coupling tank body 1 is improved. Secondary flocculation is formed in the coupling tank body 1. The structural member 11 in the coupling tank body 1 further stirs and mixes the reaction flocculant to achieve a good flocculation effect, further reducing the turbidity of the outlet water. The sludge is precipitated at the bottom of the sludge collecting hopper 15 and then discharged through the sludge discharge pipe 16. As the water level rises, the treated water is discharged from the water collecting tank 14 through the outlet pipe 13.

[0026] Example 2: Vertical flow straight tube flocculation sedimentation coupling tank

[0027] See also Figure 2 The present invention provides an embodiment: a vertical flow flocculation sedimentation coupling tank, comprising a coupling tank body 1 and a structural member 11; a mud collecting bucket 15 is fixedly connected to the lower end of the coupling tank body 1; a mud discharge pipe 16 is arranged at the lower end of the mud collecting bucket 15; an inlet pipe 12 extending into the coupling tank body 1 is installed at the left end of the coupling tank body 1; a water collecting trough 14 is installed at the upper end of the coupling tank body 1; an outlet pipe 13 is installed at the lower right end of the water collecting trough 14; a structural member 11 is installed at the middle part of the inner side of the coupling tank body 1, and the structural member 11 adopts a straight pipe.

[0028] During operation, the water to be treated enters the coupling tank body 1 from the water inlet pipe 12. The structural member 11 adopts a straight pipe, which has a good precipitation effect on alum flocs. The hydraulic conditions in the coupling tank body 1 are adjusted by the structural member 11, and the flow velocity gradient in the coupling tank body 1 is improved. Secondary flocculation is formed in the coupling tank body 1. The structural member 11 in the coupling tank body 1 further stirs and mixes the reaction flocculant to achieve a good flocculation effect, further reducing the turbidity of the outlet water. The sludge is precipitated at the bottom of the sludge collecting hopper 15 and then discharged through the sludge discharge pipe 16. As the water level rises, the treated water is discharged from the water collecting tank 14 through the outlet pipe 13.

[0029] Example 3: Vertical flow baffle flocculation sedimentation coupling tank

[0030] See also Figure 3 The present invention provides an embodiment: a vertical flow flocculation sedimentation coupling tank, comprising a coupling tank body 1 and a structural member 11; a mud collecting bucket 15 is fixedly connected to the lower end of the coupling tank body 1; a mud discharge pipe 16 is arranged at the lower end of the mud collecting bucket 15; an inlet pipe 12 extending into the coupling tank body 1 is installed at the left end of the coupling tank body 1; a water collecting trough 14 is installed at the upper end of the coupling tank body 1; an outlet pipe 13 is installed at the lower right end of the water collecting trough 14; a structural member 11 is installed at the middle part of the inner side of the coupling tank body 1, and the structural member 11 is a folded plate.

[0031] During operation, the water to be treated enters the coupling tank body 1 from the water inlet pipe 12. The structural member 11 adopts a folded plate, which has a good precipitation effect on alum flocs. The hydraulic conditions in the coupling tank body 1 are adjusted by the structural member 11, and the flow velocity gradient in the coupling tank body 1 is improved. Secondary flocculation is formed in the coupling tank body 1. The structural member 11 in the coupling tank body 1 is further stirred and mixed with the reaction flocculant to achieve a good flocculation effect, further reducing the turbidity of the outlet water. The sludge is precipitated at the bottom of the sludge hopper 15 and then discharged through the sludge discharge pipe 16. As the water level rises, the treated water is discharged from the water collecting tank 14 through the outlet pipe 13.

[0032] Example 4: Vertical rheological flow folded plate flocculation sedimentation coupling tank

[0033] See also Figure 4 The present invention provides an embodiment: a vertical flow flocculation sedimentation coupling tank, comprising a coupling tank body 1 and a structural member 11; a mud collecting bucket 15 is fixedly connected to the lower end of the coupling tank body 1; a mud discharge pipe 16 is arranged at the lower end of the mud collecting bucket 15; an inlet pipe 12 extending into the coupling tank body 1 is installed at the left end of the coupling tank body 1; a water collecting trough 14 is installed at the upper end of the coupling tank body 1; an outlet pipe 13 is installed at the lower right end of the water collecting trough 14; a structural member 11 is installed at the middle part of the inner side of the coupling tank body 1, and the structural member 11 adopts a variable flow folding plate.

[0034] During operation, the water to be treated enters the coupling tank body 1 from the water inlet pipe 12. The structural member 11 adopts a variable flow folding plate, which has a good precipitation effect on alum flocs. The hydraulic conditions in the coupling tank body 1 are adjusted by the structural member 11, and the flow velocity gradient in the coupling tank body 1 is improved. Secondary flocculation is formed in the coupling tank body 1. The structural member 11 in the coupling tank body 1 is further stirred and mixed with the reaction flocculant to achieve a good flocculation effect, further reducing the turbidity of the outlet water. The sludge is precipitated at the bottom of the sludge collecting hopper 15 and then discharged through the sludge discharge pipe 16. As the water level rises, the treated water is discharged from the water collecting tank 14 through the outlet pipe 13.

[0035] Through the above steps, on the basis of the original laminar flow form of the sedimentation tank water flow, a device is added to make the water body locally turbulent without affecting the original sedimentation state, so that the flocculation reaction is locally generated again in the sedimentation tank, and its purpose is to make the smaller solid particles and suspended matter collide and combine again to form large solid particles without disturbing the solid particles that have been precipitated, thereby improving the solid removal rate of the sedimentation tank and further improving the effluent water quality of the sedimentation tank. A vertical flow flocculation and sedimentation coupling tank is set after the flocculation reaction tank, which can not only make the coagulant further fully mixed and react, but also further improve the sedimentation effect through the coupling effect of flocculation and sedimentation, and meet the turbidity index requirements of the water plant effluent. It has the advantages of simple structure, small footprint, high efficiency, high degree of automation, easy installation and use, stable operation, safe and reliable, strong adaptability, large impact load resistance, and can adapt to the treatment process requirements of different water qualities to solve the problem that flocculation reaction no longer occurs in the sedimentation tank and smaller solid particles cannot be removed by gravity.

[0036] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A vertical flow flocculation sedimentation coupling tank, characterized in that: The coupling pool body (1) comprises a coupling pool body (1) and a structural member (11); a mud collecting bucket (15) is fixedly connected to the lower end of the coupling pool body (1); a mud discharge pipe (16) is arranged at the lower end of the mud collecting bucket (15); a water inlet pipe (12) extending into the coupling pool body (1) is installed at the left end of the coupling pool body (1); a water collecting trough (14) is installed at the upper end of the coupling pool body (1); a water outlet pipe (13) is installed at the lower right end of the water collecting trough (14); and a structural member (11) is installed at the middle part of the inner side of the coupling pool body (1).

2. The vertical flow flocculation sedimentation coupling tank according to claim 1, characterized in that: The structural member (11) is an inclined plate or an inclined tube, and is made of stainless steel, PE, PVC, ethylene-propylene copolymer, polypropylene or polyvinyl chloride.

3. The vertical flow flocculation sedimentation coupling tank according to claim 1, characterized in that: The structural member (11) is a straight pipe made of stainless steel, PE, PVC, ethylene-propylene copolymer, polypropylene or polyvinyl chloride.

4. The vertical flow flocculation sedimentation coupling tank according to claim 1, characterized in that: The structural member (11) is a folded plate made of stainless steel, PE, PVC, ethylene-propylene copolymer, polypropylene or polyvinyl chloride.

5. The vertical flow flocculation sedimentation coupling tank according to claim 1, characterized in that: The structural member (11) is a flow-changing folding plate made of stainless steel, PE, PVC, ethylene-propylene copolymer, polypropylene or polyvinyl chloride.

6. The vertical flow flocculation sedimentation coupling tank according to claim 1, characterized in that: The vertical flow flocculation sedimentation coupling tank is automatically controlled by a PLC control system.

7. The vertical flow flocculation sedimentation coupling tank according to claim 1, characterized in that: The outer surface of the part of the water inlet pipe (12) extending into the coupling pool body (1) is provided with water outlets distributed at equal intervals.

8. Application of the vertical flow flocculation sedimentation coupling tank according to claim 1 in high turbidity water treatment, water purification in water supply and drainage systems, and large, medium and small water plants.

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