Flocculation reaction device and reaction method

Abstract

The invention discloses a flocculation reaction device which comprises a pressure pump, the pressure pump is connected with a reactor through a pipeline, the reactor comprises an outer cylinder, an inner cylinder is sleeved with the outer cylinder, a partition plate is fixedly connected into the outer cylinder, and the outer cylinder is divided into a second-stage annular rotational flow reaction chamber and a first-stage annular rotational flow reaction chamber through the partition plate; the second-stage annular rotational flow reaction chamber is positioned above the first-stage annular rotational flow reaction chamber, the upper part of the first-stage annular rotational flow reaction chamber is connected with a communicating pipe, the other end of the communicating pipe is connected with the lower part of the second-stage annular rotational flow reaction chamber, the inner cylinder is a baffling reaction chamber, and the second-stage annular rotational flow reaction chamber is communicated with the upper part of the baffling reaction chamber. The invention also discloses a flocculation reaction method. According to the flocculation reaction device and the reaction method, the problems that an existing flocculation reaction device is large in mechanical stirring energy consumption and single in water flow velocity are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oilfield produced water treatment equipment, and particularly relates to a flocculation reaction device and a flocculation reaction method. BACKGROUND

[0002] The flocculation reaction is an indispensable link in the chemical water treatment, and the purpose is to apply an external force to the sewage to which a flocculant has been added, so that the small particles in the sewage collide with each other to form larger flocs, which are convenient for the next step of sedimentation and separation. Commonly used flocculation reaction equipment includes a baffle reaction tank, a mechanical stirring reaction tank, and a cyclone reactor. The baffle reaction equipment is widely used in the municipal sewage treatment industry, and is not suitable for small water volume places due to structural limitations. The mechanical stirring reaction equipment needs to be matched with a power stirring device, and has relatively large energy consumption, large maintenance and management workload, and is mostly a normal pressure device, and the effluent cannot flow into a large equipment such as a sedimentation tank. The cyclone reactor is a pressure device, but its structure is simple, and the water flow velocity is single, which cannot meet the requirements of the change of the water flow velocity gradient in different stages of the flocculation reaction. CN116062868A discloses a cyclone type flocculation and clarification device and method, which integrates reagent adding and mixing, cyclone sand setting, and inclined pipe type sedimentation and clarification. However, the above mechanical stirring has the problems of large energy consumption and single water flow velocity. SUMMARY

[0003] The present application aims to provide a flocculation reaction device, which solves the problems of large mechanical stirring energy consumption and single water flow velocity of the existing flocculation reaction device.

[0004] Another object of the present application is to provide a flocculation reaction method.

[0005] The technical solution adopted by the present application is that the flocculation reaction device comprises a pressurizing pump, the pressurizing pump is connected with a reactor through a pipeline, the reactor comprises an outer cylinder, an inner cylinder is sleeved in the outer cylinder, a baffle is fixedly connected in the inner cylinder, the outer cylinder is divided into a second stage annular cyclone reaction chamber and a first stage annular cyclone reaction chamber through the baffle, the second stage annular cyclone reaction chamber is located above the first stage annular cyclone reaction chamber, a communication pipe is connected to the upper part of the first stage annular cyclone reaction chamber, the other end of the communication pipe is connected with the lower part of the second stage annular cyclone reaction chamber, the inner cylinder is a baffling reaction chamber, and the second stage annular cyclone reaction chamber is communicated with the upper part of the baffling reaction chamber.

[0006] The technical solution of another aspect of the present application is characterized in that:

[0007] One end of the pressurizing pump is connected with a pressurizing pump water inlet pipe, the other end of the pressurizing pump is connected with a pressurizing pump water outlet pipe, the other end of the pressurizing pump water outlet pipe is communicated with the lower part of the first stage annular cyclone reaction chamber, a pipeline static mixer is installed on the pressurizing pump water outlet pipe, the pressurizing pump water inlet pipe is connected with a conditioning agent adding pipe, and the pipeline static mixer is connected with a flocculant adding pipe.

[0008] The cross section of the second-stage annular cyclone reaction chamber is larger than that of the first-stage annular cyclone reaction chamber.

[0009] The baffle plates are fixedly connected inside the baffling reaction chamber, all the baffle plates are staggered and provided with holes from top to bottom, the baffle plates are inclined downward, and the inclination is not less than 1%.

[0010] The exhaust pipe is fixedly connected to the top of the reactor, and the reactor water outlet pipe is fixedly connected to the bottom of the reactor.

[0011] Another technical solution adopted by the present application is a flocculation reaction method, comprising the following steps:

[0012] S1. Start the exhaust pipe at the top of the reactor to release the internal pressure of the reactor;

[0013] S2. Input raw water through the pressurized pump water inlet pipe, start the pressurized pump, add one or more flocculants into the pipeline static mixer through the flocculant adding pipe, and then enter the reactor from the pressurized pump water inlet pipe after being pressurized by the pressurized pump;

[0014] S3. After the raw water and the flocculants are mixed by hydraulic stirring in the reactor, a flocculation reaction occurs, the water flow velocity of the mixed solution changes in a gradient during the reaction process, and the obtained sediment slides to the bottom of the reactor;

[0015] S4. The sediment enters the sedimentation and precipitation equipment through the reactor water outlet pipe at the bottom of the reactor.

[0016] The present application is also characterized in that:

[0017] The specific process of S3 is as follows: the raw water and the flocculants enter horizontally from the tangent at the lower part of the first-stage annular cyclone reaction chamber, rotate upward to form a cyclone, are mixed by cyclone stirring, the obtained mixed solution rotates upward to the upper part of the first-stage annular cyclone reaction chamber and flows out horizontally along the tangent, enters the lower part of the second-stage annular cyclone reaction chamber horizontally through the communication pipe, the mixed solution water flow rotates upward, a flocculation reaction occurs during the upward process, the generated sedimentary liquid water flow rises to the top of the second-stage annular cyclone reaction chamber and enters the baffling reaction chamber, the sedimentary liquid flows from top to bottom through the baffling reaction chamber, further collision occurs through the baffle plates to strengthen the flocculation reaction, and the generated sediment slides to the bottom of the reactor.

[0018] The flow velocity of the raw water and the flocculant water flow in the first-stage annular cyclone reaction chamber is 0.5-0.6 m / s, the flow velocity of the mixed solution water flow in the second-stage annular cyclone reaction chamber is 0.3-0.4 m / s, and the flow velocity of the sedimentary liquid water flow in the baffling reaction chamber is 0.1-0.2 m / s, and the water flow residence time of each reaction chamber is 6-10 min.

[0019] After raw water is introduced through the inlet pipe of the booster pump, a regulator is added to the inlet pipe of the booster pump based on the pH value of the raw water. The booster pump is then started, and the raw water and regulator are mixed by the pump to bring the pH value of the raw water to 8-10.

[0020] While adding one or more flocculants to the static mixer in the pipeline through the flocculant dosing pipe, one or more coagulant aids are also added to the static mixer in the pipeline through the flocculant dosing pipe, depending on the water quality, so that the flocs generated by the subsequent flocculation reaction are denser.

[0021] The beneficial effects of this invention are:

[0022] The flocculation reaction device and reaction method provided by this invention employ a reactor with an inner and outer cylinder structure. In the outer cylinder of the reactor, the cross-section of the second-stage annular swirling reaction chamber is larger than that of the first annular swirling chamber, and the upper part of the baffled reaction chamber in the inner cylinder is smaller than that in the lower part. The special structure of the reactor can meet the requirements of water flow velocity gradient changes at different stages of the flocculation reaction, solving the problem of the single water flow velocity in existing flocculation reaction devices. Hydraulic stirring is performed through swirling, eliminating the need for dedicated mechanical stirring equipment and solving the problem of high energy consumption of mechanical stirring in existing flocculation reaction devices.

[0023] The flocculation reaction device and reaction method provided by the present invention adopt a closed pressurized operation mode, and the effluent can be directly entered into the subsequent treatment equipment without secondary lifting, which is suitable for different design flow rates. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a cyclone-baffle three-chamber flocculation reactor.

[0025] Figure 2 This is a schematic diagram of the water inlet for the first-stage annular vortex reaction chamber;

[0026] Figure 3 This is a schematic diagram of the inlet and outlet water of the second-stage annular vortex reaction chamber;

[0027] In the diagram: 1. Reactor; 2. Booster pump; 3. First-stage annular swirl reaction chamber; 4. Second-stage annular swirl reaction chamber; 5. Baffle reaction chamber; 6. Baffle plate; 7. Booster pump inlet pipe; 8. Booster pump outlet pipe; 9. Static mixer; 10. Connecting pipe; 11. Exhaust pipe; 12. Reactor outlet pipe; 13. Baffle plate; 14. Conditioner dosing pipe; 15. Flocculant dosing pipe. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] The flocculation reaction device provided by this invention, such as Figure 1As shown, the reactor includes a pressurizing pump 2, which is connected to a reactor 1 via a pipeline. The reactor 1 includes an outer cylinder, inside which is an inner cylinder. A partition 13 is fixed inside the outer cylinder, which is divided into a second-stage annular swirling reaction chamber 4 and a first-stage annular swirling reaction chamber 3 by the partition 13. The second-stage annular swirling reaction chamber 4 is located above the first-stage annular swirling reaction chamber 3. A connecting pipe 10 is connected to the upper part of the first-stage annular swirling reaction chamber 3, and the other end of the connecting pipe 10 is connected to the lower part of the second-stage annular swirling reaction chamber 4. The inner cylinder is a baffled reaction chamber 5, and the upper part of the second-stage annular swirling reaction chamber 4 is connected to the baffled reaction chamber 5.

[0030] One end of the pressurizing pump 2 is connected to the pressurizing pump inlet pipe 7, and the other end of the pressurizing pump 2 is connected to the pressurizing pump outlet pipe 8. The other end of the pressurizing pump outlet pipe 8 is connected to the lower part of the first-stage annular vortex reaction chamber 3. A pipeline static mixer 9 is installed on the pressurizing pump outlet pipe 8. The pressurizing pump inlet pipe 7 is connected to the regulator dosing pipe 14, and the pipeline static mixer 9 is connected to the flocculant dosing pipe 15.

[0031] The cross-section of the second-stage annular swirling reaction chamber 4 is larger than that of the first-stage annular swirling reaction chamber 3. By controlling the size of the cross-section, the rotational speed of the water flow in the second-stage annular swirling reaction chamber 4 is controlled to be lower than that in the first-stage annular swirling reaction chamber 3.

[0032] Several baffle plates 6 are fixedly connected inside the baffle reaction chamber 5. All baffle plates 6 have holes staggered from top to bottom. The water flow velocity in the baffle reaction chamber 5 is controlled by the pre-set hole area of ​​the baffle plates 6. The water flow velocity in the baffle reaction chamber 5 is lower than the water flow velocity in the second-stage vortex reaction chamber 4. The baffle plates 6 slope downwards with a slope of not less than 1% to prevent flocs from depositing on the baffle plates 6.

[0033] An exhaust pipe 11 is fixed to the top of reactor 1. During the initial operation of the reactor, exhaust is performed to release the internal pressure. An outlet pipe 12 is fixed to the bottom of reactor 1, and the outlet pipe 12 is connected to a settling device for subsequent treatment.

[0034] The flocculation reaction method provided by this invention includes the following steps:

[0035] S1. Start the exhaust pipe at the top of the reactor to release the internal pressure of the reactor;

[0036] S2. Raw water is input through the pressurized pump inlet pipe, the pressurized pump is started, and one or more flocculants are added to the static mixer through the flocculant dosing pipe. After being pressurized by the pressurized pump, the flocculants enter the reactor through the pressurized pump inlet pipe.

[0037] After raw water is introduced through the inlet pipe of the booster pump, based on the pH value of the raw water, a regulator is added to the inlet pipe of the booster pump through the regulator addition pipe. The booster pump is started, and the raw water and regulator are mixed by the pump to make the pH value of the raw water reach 8-10. When the raw water is in this pH range, it is more conducive to the reaction of the flocculant.

[0038] While adding one or more flocculants to the static mixer in the pipeline through the flocculant dosing pipe, one or more coagulant aids are also added to the static mixer in the pipeline through the flocculant dosing pipe, depending on the water quality. The coagulant aids can increase the settling performance of the flocs, making the flocs generated by the subsequent flocculation reaction denser.

[0039] S3. After the raw water and flocculant are mixed in the reactor by hydraulic stirring, a flocculation reaction occurs. During the reaction, the flow velocity of the mixed liquid changes in a gradient, and the sediment obtained from the reaction slides to the bottom of the reactor.

[0040] The specific process of S3 is as follows: Raw water and flocculant enter horizontally tangentially from the lower part of the first-stage annular vortex reaction chamber, rotate and rise to form a vortex, and are mixed by vortex stirring. The resulting mixture rotates and rises to the upper part of the first-stage annular vortex reaction chamber and exits tangentially. It then enters the lower part of the second-stage annular vortex reaction chamber through a connecting pipe. The mixed water flows upward in a rotating manner, and a flocculation reaction occurs during the rise. The sediment generated by the reaction flows upward to the top of the second-stage annular vortex reaction chamber and enters the baffle reaction chamber. The sediment flows from top to bottom through the baffle reaction chamber and undergoes further collisions through the baffle plates, which enhances the flocculation reaction. The sediment generated by the reaction slides to the bottom of the reactor.

[0041] The flow velocity of raw water and flocculant water in the first-stage annular vortex reaction chamber is 0.5-0.6 m / s, the flow velocity of mixed liquid water in the second-stage annular vortex reaction chamber is 0.3-0.4 m / s, and the flow velocity of sediment water in the baffle reaction chamber is 0.1-0.2 m / s; the residence time of water in each reaction chamber is 6-10 min.

[0042] S4. The sediment enters the settling device through the reactor outlet pipe at the bottom of the reactor.

[0043] Example 1

[0044] The flocculation reaction device proposed in this embodiment, such as Figure 1As shown, the reactor includes a pressurizing pump 2, which is connected to a reactor 1 via a pipeline. The reactor 1 includes an outer cylinder, inside which is an inner cylinder. A partition 13 is fixed inside the outer cylinder, which is divided into a second-stage annular swirling reaction chamber 4 and a first-stage annular swirling reaction chamber 3 by the partition 13. The second-stage annular swirling reaction chamber 4 is located above the first-stage annular swirling reaction chamber 3. A connecting pipe 10 is connected to the upper part of the first-stage annular swirling reaction chamber 3, and the other end of the connecting pipe 10 is connected to the lower part of the second-stage annular swirling reaction chamber 4. The inner cylinder is a baffled reaction chamber 5, and the upper part of the second-stage annular swirling reaction chamber 4 is connected to the baffled reaction chamber 5.

[0045] Example 2

[0046] The flocculation reaction device proposed in this embodiment, such as Figure 1 As shown, the reactor includes a pressurizing pump 2, which is connected to a reactor 1 via a pipeline. The reactor 1 includes an outer cylinder, inside which is an inner cylinder. A partition 13 is fixed inside the outer cylinder, which is divided into a second-stage annular swirling reaction chamber 4 and a first-stage annular swirling reaction chamber 3 by the partition 13. The second-stage annular swirling reaction chamber 4 is located above the first-stage annular swirling reaction chamber 3. A connecting pipe 10 is connected to the upper part of the first-stage annular swirling reaction chamber 3, and the other end of the connecting pipe 10 is connected to the lower part of the second-stage annular swirling reaction chamber 4. The inner cylinder is a baffled reaction chamber 5, and the upper part of the second-stage annular swirling reaction chamber 4 is connected to the baffled reaction chamber 5.

[0047] One end of the pressurizing pump 2 is connected to the pressurizing pump inlet pipe 7, and the other end of the pressurizing pump 2 is connected to the pressurizing pump outlet pipe 8. The other end of the pressurizing pump outlet pipe 8 is connected to the lower part of the first-stage annular vortex reaction chamber 3. A pipeline static mixer 9 is installed on the pressurizing pump outlet pipe 8. The pressurizing pump inlet pipe 7 is connected to the regulator dosing pipe 14, and the pipeline static mixer 9 is connected to the flocculant dosing pipe 15.

[0048] The cross-section of the second-stage annular swirling reaction chamber 4 is larger than the cross-section of the first-stage annular swirling reaction chamber 3.

[0049] Example 3

[0050] The flocculation reaction device proposed in this embodiment, such as Figure 1 As shown, the reactor includes a pressurizing pump 2, which is connected to a reactor 1 via a pipeline. The reactor 1 includes an outer cylinder, inside which is an inner cylinder. A partition 13 is fixed inside the outer cylinder, which is divided into a second-stage annular swirling reaction chamber 4 and a first-stage annular swirling reaction chamber 3 by the partition 13. The second-stage annular swirling reaction chamber 4 is located above the first-stage annular swirling reaction chamber 3. A connecting pipe 10 is connected to the upper part of the first-stage annular swirling reaction chamber 3, and the other end of the connecting pipe 10 is connected to the lower part of the second-stage annular swirling reaction chamber 4. The inner cylinder is a baffled reaction chamber 5, and the upper part of the second-stage annular swirling reaction chamber 4 is connected to the baffled reaction chamber 5.

[0051] One end of the pressurizing pump 2 is connected to the pressurizing pump inlet pipe 7, and the other end of the pressurizing pump 2 is connected to the pressurizing pump outlet pipe 8. The other end of the pressurizing pump outlet pipe 8 is connected to the lower part of the first-stage annular vortex reaction chamber 3. A pipeline static mixer 9 is installed on the pressurizing pump outlet pipe 8. The pressurizing pump inlet pipe 7 is connected to the regulator dosing pipe 14, and the pipeline static mixer 9 is connected to the flocculant dosing pipe 15.

[0052] The cross-section of the second-stage annular swirling reaction chamber 4 is larger than the cross-section of the first-stage annular swirling reaction chamber 3.

[0053] Several baffles 6 are fixedly connected inside the baffle reaction chamber 5. All baffles 6 have holes staggered from top to bottom. The baffles 6 slope downwards with a slope of not less than 1%.

[0054] An exhaust pipe 11 is fixedly connected to the top of reactor 1, and a reactor outlet pipe 12 is fixedly connected to the bottom of reactor 1.

[0055] Example 4

[0056] The flocculation reaction method proposed in this embodiment includes the following steps:

[0057] S1. Start the exhaust pipe at the top of the reactor to release the internal pressure of the reactor;

[0058] S2. Raw water is input through the pressurized pump inlet pipe, the pressurized pump is started, and one or more flocculants are added to the static mixer through the flocculant dosing pipe. After being pressurized by the pressurized pump, the flocculants enter the reactor through the pressurized pump inlet pipe.

[0059] S3. After the raw water and flocculant are mixed in the reactor by hydraulic stirring, a flocculation reaction occurs. During the reaction, the flow velocity of the mixed liquid changes in a gradient, and the sediment obtained from the reaction slides to the bottom of the reactor.

[0060] S4. The sediment enters the settling device through the reactor outlet pipe at the bottom of the reactor.

[0061] Example 5

[0062] The flocculation reaction method proposed in this embodiment includes the following steps:

[0063] S1. Start the exhaust pipe at the top of the reactor to release the internal pressure of the reactor;

[0064] S2. Raw water is input through the pressurized pump inlet pipe, the pressurized pump is started, and one or more flocculants are added to the static mixer through the flocculant dosing pipe. After being pressurized by the pressurized pump, the flocculants enter the reactor through the pressurized pump inlet pipe.

[0065] S3. After the raw water and flocculant are mixed in the reactor by hydraulic stirring, a flocculation reaction occurs. During the reaction, the flow velocity of the mixed liquid changes in a gradient, and the sediment obtained from the reaction slides to the bottom of the reactor.

[0066] The specific process of S3 is as follows: Raw water and flocculant enter horizontally tangentially from the lower part of the first-stage annular vortex reaction chamber, rotate and rise to form a vortex, and are mixed by vortex stirring. The resulting mixture rotates and rises to the upper part of the first-stage annular vortex reaction chamber and exits tangentially. It then enters the lower part of the second-stage annular vortex reaction chamber through a connecting pipe. The mixed water flows upward in a rotating manner, and a flocculation reaction occurs during the rise. The sediment generated by the reaction flows upward to the top of the second-stage annular vortex reaction chamber and enters the baffle reaction chamber. The sediment flows from top to bottom through the baffle reaction chamber and undergoes further collisions through the baffle plates, which enhances the flocculation reaction. The sediment generated by the reaction slides to the bottom of the reactor.

[0067] The flow velocity of raw water and flocculant water in the first-stage annular vortex reaction chamber is 0.5-0.6 m / s, the flow velocity of mixed liquid water in the second-stage annular vortex reaction chamber is 0.3-0.4 m / s, and the flow velocity of sediment water in the baffle reaction chamber is 0.1-0.2 m / s. The residence time of water in each reaction chamber is 6-10 min.

[0068] S4. The sediment enters the settling device through the reactor outlet pipe at the bottom of the reactor.

[0069] Example 6

[0070] The flocculation reaction method proposed in this embodiment includes the following steps:

[0071] S1. Start the exhaust pipe at the top of the reactor to release the internal pressure of the reactor;

[0072] S2. Raw water is input through the pressurized pump inlet pipe, the pressurized pump is started, and one or more flocculants are added to the static mixer through the flocculant dosing pipe. After being pressurized by the pressurized pump, the flocculants enter the reactor through the pressurized pump inlet pipe.

[0073] After the raw water is introduced through the inlet pipe of the booster pump, based on the pH value of the raw water, a regulator is added to the inlet pipe of the booster pump through the regulator addition pipe. The booster pump is started, and the raw water and regulator are mixed by the pump to make the pH value of the raw water reach 8-10.

[0074] While adding one or more flocculants to the static mixer in the pipeline through the flocculant dosing pipe, one or more coagulant aids are also added to the static mixer in the pipeline through the flocculant dosing pipe, depending on the water quality, so that the flocs generated in the subsequent flocculation reaction are denser.

[0075] S3. After the raw water and flocculant are mixed in the reactor by hydraulic stirring, a flocculation reaction occurs. During the reaction, the flow velocity of the mixed liquid changes in a gradient, and the sediment obtained from the reaction slides to the bottom of the reactor.

[0076] The specific process of S3 is as follows: Raw water and flocculant enter horizontally tangentially from the lower part of the first-stage annular vortex reaction chamber, rotate and rise to form a vortex, and are mixed by vortex stirring. The resulting mixture rotates and rises to the upper part of the first-stage annular vortex reaction chamber and exits tangentially. It then enters the lower part of the second-stage annular vortex reaction chamber through a connecting pipe. The mixed water flows upward in a rotating manner, and a flocculation reaction occurs during the rise. The sediment generated by the reaction flows upward to the top of the second-stage annular vortex reaction chamber and enters the baffle reaction chamber. The sediment flows from top to bottom through the baffle reaction chamber and undergoes further collisions through the baffle plates, which enhances the flocculation reaction. The sediment generated by the reaction slides to the bottom of the reactor.

[0077] The flow velocity of raw water and flocculant water in the first-stage annular vortex reaction chamber is 0.5-0.6 m / s, the flow velocity of mixed liquid water in the second-stage annular vortex reaction chamber is 0.3-0.4 m / s, and the flow velocity of sediment water in the baffle reaction chamber is 0.1-0.2 m / s. The residence time of water in each reaction chamber is 6-10 min.

[0078] S4. The sediment enters the settling device through the reactor outlet pipe at the bottom of the reactor.

Claims

1. A flocculation reactor apparatus characterized by, The device comprises a pressurizing pump (2) connected with a reactor (1) through a pipeline, the reactor (1) comprises an outer cylinder, an inner cylinder is sleeved in the outer cylinder, a partition plate (13) is fixedly connected in the outer cylinder, the outer cylinder is divided into a second-stage annular cyclone reaction chamber (4) and a first-stage annular cyclone reaction chamber (3) by the partition plate (13), the second-stage annular cyclone reaction chamber (4) is located above the first-stage annular cyclone reaction chamber (3), a communication pipe (10) is connected to the upper part of the first-stage annular cyclone reaction chamber (3), the other end of the communication pipe (10) is connected with the lower part of the second-stage annular cyclone reaction chamber (4), the inner cylinder is a baffle reaction chamber (5), the second-stage annular cyclone reaction chamber (4) is communicated with the upper part of the baffle reaction chamber (5).

2. The flocculation reaction apparatus according to claim 1, characterized by One end of the pressurizing pump (2) is connected with a pressurizing pump water inlet pipe (7), the other end of the pressurizing pump (2) is connected with a pressurizing pump water outlet pipe (8), the other end of the pressurizing pump water outlet pipe (8) is communicated with the lower part of the first-stage annular cyclone reaction chamber (3), a pipeline static mixer (9) is installed on the pressurizing pump water outlet pipe (8), the pressurizing pump water inlet pipe (7) is connected with an additive dosing pipe (14), the pipeline static mixer (9) is connected with a flocculant dosing pipe (15).

3. The flocculation reaction apparatus according to claim 1, characterized by The cross section of the second-stage annular cyclone reaction chamber (4) is larger than that of the first-stage annular cyclone reaction chamber (3).

4. The flocculation reaction apparatus according to claim 1, characterized by A plurality of baffle plates (6) are fixedly connected in the baffle reaction chamber (5), all the baffle plates (6) are staggered and provided with holes from top to bottom, the baffle plates (6) slope downward, and the slope is not less than 1%.

5. The flocculation reaction apparatus of claim 1, wherein An exhaust pipe (11) is fixedly connected to the top of the reactor (1), and a reactor water outlet pipe (12) is fixedly connected to the bottom of the reactor (1).

6. Flocculation reaction method, characterized in that, The flocculation reaction device of claims 1-5 is used, comprising the following steps: S1. Start the exhaust pipe at the top of the reactor to release the internal pressure of the reactor; S2. Input raw water through the pressurizing pump water inlet pipe, start the pressurizing pump, add one or more flocculants into the pipeline static mixer through the flocculant dosing pipe, and then enter the reactor from the pressurizing pump water inlet pipe after being pressurized by the pressurizing pump; S3. After the raw water and the flocculants are mixed by hydraulic stirring in the reactor, a flocculation reaction occurs, the water flow velocity of the mixed solution changes in a gradient during the reaction, and the obtained sediment slides to the bottom of the reactor; S4. The sediment enters the sedimentation equipment through the reactor water outlet pipe at the bottom of the reactor.

7. The flocculation reaction method according to claim 6, characterized by, The specific process of the S3 is that the raw water and flocculant enter tangentially horizontally from the lower part of the first-stage annular cyclone reaction chamber, form cyclone by rotating upward, are mixed by cyclone stirring, the obtained mixed liquid rotates upward to the upper part of the first-stage annular cyclone reaction chamber, and then flows out horizontally along a tangent, enters the lower part of the second-stage annular cyclone reaction chamber through a connecting pipe, and rotates upward, during which flocculation reaction occurs, the generated sediment liquid flows into the baffle reaction chamber after rotating upward to the top of the second-stage annular cyclone reaction chamber, and the sediment liquid flows from top to bottom through the baffle reaction chamber, further collision occurs through the baffle plate to strengthen the flocculation reaction, and the generated sediment slides to the bottom of the reactor.

8. The flocculation reaction method according to claim 7, characterized by, The flow rate of the raw water and flocculant in the first-stage annular cyclone reaction chamber is 0.5-0.6 m / s, the flow rate of the mixed liquid in the second-stage annular cyclone reaction chamber is 0.3-0.4 m / s, and the flow rate of the sediment liquid in the baffle reaction chamber is 0.1-0.2 m / s, and the water flow residence time in each reaction chamber is 6-10 min.

9. The flocculation reaction method according to claim 6, characterized by, After the raw water is input through the pressurized pump water inlet pipe, based on the pH value of the raw water, an adjusting agent is added to the pressurized pump water inlet pipe through an adjusting agent adding pipe, the pressurized pump is started, and the raw water and the adjusting agent are mixed to make the pH value of the raw water reach 8-10.

10. The flocculation reaction method according to claim 6, characterized by, While one or more flocculants are added to the pipeline static mixer through a flocculant adding pipe, based on the water quality, one or more coagulants are added to the pipeline static mixer through the flocculant adding pipe, so that the floc generated in the subsequent flocculation reaction is more compact.

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