Biochemical reactor special for natural water body purification

Abstract

The utility model relates to a biochemical reactor special for natural water purification. The biochemical reactor comprises a reactor main body, a water inlet system, a filler layer, a turbulent flow stopper and a rotary backwashing device, the reactor main body is surrounded by a flexible device wall; the water inlet system comprises a water pump, a water inlet pipe and a water distribution pipe, the outer edge of the turbulent flow stopper is hermetically connected with the wall of the reactor main body; the turbulent flow stopper is provided with a plurality of vertical pipelines which are parallel to one another and are arranged in a honeycomb shape; the rotary backwashing device is provided with a washing hole facing the turbulent flow stopper; the reactor main body is provided with a water outlet pipe leading to the outside. The device is specially designed for the natural water body, and is light in weight, movable, deformable, quick to mount, simple and convenient to operate, high in treatment efficiency, low in investment and operation cost, and suitable for purifying and treating the natural water body with low pollution load.

Description

Technical Field

[0001] This utility model relates to a biochemical reactor specifically designed for the purification of natural water bodies, belonging to the technical field of water treatment equipment. Background Technology

[0002] Biological treatment technology utilizes the absorption and metabolism of microorganisms to degrade organic matter and other pollutants in water, primarily removing dissolved pollutants. It is currently an important method for wastewater treatment. In the field of water treatment technology, scenarios arise involving the purification of low-concentration polluted water, such as in natural water bodies. However, existing biological treatment devices suffer from poor treatment efficiency for low-concentration polluted water due to the small specific surface area of ​​their carrier materials. Therefore, it is difficult to achieve efficient purification at a low operating cost when dealing with natural water bodies with low pollution loads.

[0003] A search revealed that patent applications CN202311796462.4 and CN117550715A disclose a high-efficiency anaerobic biofilm reactor. The reaction zone includes an inlet pipe, a gas recirculation aeration device, a vortex distributor, a tangential water outlet, and self-made packing material. The gas, self-made packing material, and wastewater are separated in a three-phase separator. The gas is collected in a gas collection box and then escapes through a pressure control valve from the exhaust port, while the wastewater is discharged from the reactor through an outlet pipe. However, this reactor is designed for industrial organic wastewater, not for natural water bodies with low pollution loads. Furthermore, the reactor structure is relatively complex and requires a three-phase separator, making it difficult to achieve efficient purification of natural water bodies with low pollution loads at a low cost.

[0004] Patent applications CN202110713420.4 and CN113968608A disclose a self-circulating, densely packed granular sludge filter sedimentation tank, comprising: a coagulation zone, a water collection pipe, a flocculation zone, a water acceleration device, a reciprocating sludge scraper, etc.; it also includes an inclined plate separation pipe assembly, which includes several inclined guide plates. In this technical solution, rapid sedimentation and separation of coagulated wastewater requires chemical addition and generates a large amount of sludge that needs treatment. It is mainly used to treat colloidal substances and suspended solids in wastewater, but its treatment effect is not significant for natural water bodies where the main pollutants are NH3-N, nitrite nitrogen, and dissolved COD. Meanwhile, the inclined plate separation tube group used in this technical solution is generally used for sludge-water separation of physicochemical sludge, but it is not suitable for biological sludge, because biological sludge is prone to forming a very thick biofilm on the inclined plate. These thick biofilms often fall off and float to the water surface due to the presence of the anaerobic layer, thus affecting the quality of the effluent. Therefore, this technical solution cannot efficiently purify natural water bodies with low pollution load at a low cost. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the prior art by proposing a biochemical reactor specifically designed for the purification of natural water bodies. It is designed for low-concentration polluted water, is lightweight, portable, deformable, quick to install, simple and convenient to operate, and has high treatment efficiency. It also has low investment and operating costs, making it suitable for purifying natural water bodies with low pollution loads.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A biochemical reactor specifically designed for purifying natural water bodies includes a reactor body, an inlet system, a packing layer, a turbulence baffle, and a rotary backwashing device. The reactor body is formed by a flexible wall, with an open upper end and a closed lower end. The upper end of the reactor body is fixedly supported on a rigid support, which has a floating body. The inlet system is located at the bottom of the reactor body and includes a water pump, an inlet pipe, and a distribution pipe connected in sequence. The water pump is located outside the reactor body, the inlet pipe passes through the wall of the reactor body and is sealed and fixed to the wall, and the distribution pipe is located inside the reactor body. The reactor is horizontally arranged with water distribution pipes having water distribution holes. A turbulence baffle is located at the top of the reactor body, with its outer edge sealed to the reactor body wall. The turbulence baffle has several parallel vertical pipes arranged in a honeycomb pattern. A rotary backwashing device is located above the turbulence baffle and has flushing holes facing the turbulence baffle. A packing layer is located below the turbulence baffle and is made of diatomaceous earth, which is conducive to the growth of microorganisms. Above the rotary backwashing device, the reactor body has an outlet pipe leading to the outside, which passes through the reactor body wall and is sealed to the wall.

[0008] During operation, this structure intermittently introduces external natural water into the reactor body through the inlet system, creating an intermittent upward flow of water from the bottom. The diatomaceous earth in the packing layer is suspended under the impact of the water flow, forming a fluidized bed. When the inlet stops, it sinks, creating a continuously compressed layer of microorganisms that fully contact, absorb, and degrade pollutants in the inlet water. The turbulence-blocking device blocks the turbulent flow, forcing the water to move upward through its honeycomb-shaped vertical pipes, thus achieving stable solid-liquid separation within the pipes, resulting in a clear upper layer and suspended solids lower layer. The interface, and due to the use of vertical pipes, the adhesion ability of biochemical sludge flocs to each surface is significantly reduced compared to the inclined plate structure of the existing technology. Thus, the thickness of the biofilm formed on the wall of the turbulence blocker is very limited and will not affect the water passage capacity of the turbulence blocker. A rotary backwashing device is installed above the turbulence blocker, which can flush each channel of the turbulence blocker, remove the biofilm on the wall of the turbulence blocker and let it settle into the bottom of the reactor. In addition, the reactor adopts a flexible wall, has a simple structure, is easy to store and transport, and is conducive to the manufacture of large-capacity reactors for temporary use to increase the treatment capacity and treatment efficiency.

[0009] The further improved technical solution of this utility model is as follows:

[0010] Preferably, in the water inlet system, the water distribution pipe includes a main water distribution pipe and multiple branch water distribution pipes. The main water distribution pipe is connected to the water inlet pipe, and each branch water distribution pipe is connected to the main water distribution pipe. The main water distribution pipe and the branch water distribution pipes are respectively provided with a number of water distribution holes. Each branch water distribution pipe is symmetrically and spaced apart on both sides of the main water distribution pipe.

[0011] By adopting the above preferred scheme, the specific structural features of the water distribution pipe in the water inlet system can be further optimized.

[0012] Preferably, the reactor body wall is provided with a rope tightening structure corresponding to the turbulence blocker, the rope tightening structure including an upper positioning rope and a lower positioning rope; the outer edge of the turbulence blocker is provided with an upper groove matching the upper positioning rope, and the outer edge of the turbulence blocker is provided with a lower groove matching the lower positioning rope; under the combined action of the upper positioning rope and the upper groove, and under the combined action of the lower positioning rope and the lower groove, the outer edge of the turbulence blocker is sealed to the reactor body wall.

[0013] By adopting the above preferred scheme, the sealing connection structure between the turbulence blocker and the main body wall of the reactor can be further optimized. This not only fixes the turbulence blocker, but also effectively prevents gaps from forming between the turbulence blocker and the main body wall of the reactor, thus avoiding uneven water flow from these gaps and reducing the efficiency of mud-water separation.

[0014] More preferably, in the turbulence blocker, the cross-section of each vertical pipe is polygonal and the side length is 3 to 8 cm; the length of each vertical pipe is 0.3 to 0.5 m; the turbulence blocker is made of pressed plastic plates that are heat-sealed together.

[0015] By adopting the above preferred scheme, the specific structural features of the turbulence blocker can be further optimized.

[0016] More preferably, the rotary backwashing device includes a rotating body and at least one purge pipe; the central part of the turbulence blocker adopts a solid structure, and the rotating body is supported on the central part of the turbulence blocker; the rotating body has a rotary motor, the output shaft of the rotary motor is connected to the purge pipe for transmission, and under the drive of the rotary motor, the purge pipe moves in a circle around the axis of the rotating body; the rotating body is provided with a water pipe, the water pipe has a solenoid valve, the inlet of the water pipe is connected to an external pressurized water source, and the outlet is connected to the purge pipe; the vertical pipes of the turbulence blocker are evenly distributed in a set of concentric circles, the flushing holes are located on the purge pipe, and the distribution position of the flushing holes matches that of each vertical pipe.

[0017] By adopting the above preferred scheme, the specific structural features of the rotary backwashing device can be further optimized. During operation, the rotary backwashing device controls the rotation of the purge pipe by controlling the rotary motor, opening the solenoid valve to introduce high-pressure water into the purge pipe, thus allowing the flushing holes to backwash and unclog each vertical pipe. Note: The above control process uses conventional existing technologies, therefore, its specific technical details need not be elaborated.

[0018] Preferably, the packing layer is in a suspended state under the impact of water flow introduced into the water inlet system; the packing layer in the suspended state is divided into an upper suspended layer and a lower suspended layer, wherein the upper suspended layer mainly uses 300-mesh diatomaceous earth and the lower suspended layer mainly uses 200-mesh diatomaceous earth.

[0019] By adopting the above preferred scheme, the specific technical details of the filler layer can be further optimized. After the diatomaceous earth is suspended by the water flow, the diatomaceous earth particles of different sizes automatically form an upper suspension layer and a lower suspension layer according to the particle size, thereby achieving efficient adsorption and degradation of pollutants in the influent.

[0020] Preferably, in the rigid support, the floating body is located at the top of the rigid support, the upper end of the reactor body is fixedly supported on the upper part of the rigid support, and the lower end of the reactor body is fixedly supported on the lower part of the rigid support.

[0021] More preferably, the bottom wall of the reactor body is provided with a fall-prevention tightening rope.

[0022] By adopting the above preferred scheme, the specific technical features such as the support structure of the reactor body can be further optimized. Among them, the anti-fall tightening rope can prevent the bottom wall of the reactor from falling excessively due to the weight of its contents.

[0023] Preferably, the reactor body is cylindrical, with a diameter of 1-6 meters and a height of 1-3 meters; a grid is provided in front of the water inlet pipe.

[0024] By adopting the above preferred scheme, the size of the reactor body can be further optimized, and the specific size can be reasonably set according to the target water volume; the screen in front of the water inlet pipe can be used for preliminary pretreatment.

[0025] Preferably, the upper part of the reactor body is also provided with an overflow trough or overflow pipe connected to the outlet pipe, and the overflow trough or overflow pipe is located between the rotary backwashing device and the outlet pipe.

[0026] By adopting the above preferred scheme, the effluent structure of the reactor can be further optimized, and the water flowing out of the overflow tank or overflow pipe will eventually be discharged through the effluent pipe.

[0027] This utility model is specifically designed for low-concentration polluted water. It has the advantages of being lightweight, portable, deformable, and quick and easy to install. It has high treatment efficiency, low investment and operating costs, and can be quickly started, debugged and operated. It is especially suitable for natural water bodies that need temporary treatment or natural water bodies in places that do not require fixed water treatment equipment. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of this utility model.

[0030] Figure 2 This is a schematic diagram of the turbulence blocker and rotary backwashing device of Embodiment 1 of this utility model.

[0031] Figure 3 for Figure 2 A top-down view.

[0032] Figure 4 This is a schematic diagram of the rotating body of the rotary backwashing device in Embodiment 1 of this utility model.

[0033] Figure 5 This is a schematic diagram of the water inlet system in Embodiment 1 of this utility model. Detailed Implementation

[0034] Example 1

[0035] like Figures 1 to 5As shown, this embodiment is a biochemical reactor specifically designed for the purification of natural water bodies. It includes a reactor body 4, an inlet system, a packing layer 14, a turbulence baffle 2, and a rotary backwashing device. The reactor body 4 is surrounded by a flexible wall, with an open upper end and a closed lower end. The upper end of the reactor body 4 is fixedly supported on a rigid support 6, which has a floating body 10. The inlet system is located at the bottom of the reactor body 4 and includes a water pump 15, an inlet pipe 1, and a distribution pipe 11 connected in sequence. The water pump 15 is located outside the reactor body 4. The inlet pipe 1 passes through the wall of the reactor body 4 and is sealed and fixed to the wall. The distribution pipe 11 is located at the bottom of the reactor body 4. The reactor body 4 is located inside and horizontally arranged. The water distribution pipe 11 has water distribution holes 12. The turbulence blocker 2 is located on the upper part of the reactor body 4. The outer edge of the turbulence blocker 2 is sealed to the wall of the reactor body 4. The turbulence blocker 2 has several parallel vertical pipes 9 arranged in a honeycomb pattern. The rotary backwashing device is located above the turbulence blocker 2. The rotary backwashing device has flushing holes 19 facing the turbulence blocker 2. The packing layer 14 is located below the turbulence blocker. The packing layer 14 is made of diatomaceous earth, which is conducive to the growth of microorganisms. The reactor body 4 is provided with an outlet pipe 5 above the rotary backwashing device. The outlet pipe 5 passes through the wall of the reactor body 4 and is sealed to the wall.

[0036] The reactor body 4 has a cable tightening structure corresponding to the turbulence blocker 2. The cable tightening structure includes an upper positioning cable 7 and a lower positioning cable 8. The upper outer edge of the turbulence blocker has an upper groove (not shown in the figure) that matches the upper positioning cable 7, and the lower outer edge of the turbulence blocker has a lower groove (not shown in the figure) that matches the lower positioning cable 8. Under the combined action of the upper positioning cable 7 and the upper groove, and under the combined action of the lower positioning cable 8 and the lower groove, the outer edge of the turbulence blocker 2 is sealed to the reactor body 4.

[0037] like Figure 3 As shown, in the turbulence blocker, the cross-section of each vertical pipe 9 is polygonal (quadrilateral in this embodiment) and the side length is 3 to 8 cm; the length of each vertical pipe 9 is 0.3 to 0.5 m; the turbulence blocker is made of pressed plastic plates that are heat-sealed together.

[0038] like Figures 2 to 4As shown, the rotary backwashing device includes a rotating body 13 and at least one purge pipe 3; the central part of the turbulence blocker adopts a solid structure, and the rotating body 13 is supported on the central part of the turbulence blocker; the rotating body 13 has a rotary motor 20, and the output shaft of the rotary motor 20 is connected to the purge pipe 3 for transmission. Under the drive of the rotary motor 20, the purge pipe 3 moves in a circle around the axis of the rotating body 13; the rotating body 13 is provided with a water pipe 21, and the water pipe 21 has a solenoid valve 22. The inlet of the water pipe 21 is connected to an external pressurized water source, and the outlet is connected to the purge pipe 3; the vertical pipes 9 of the turbulence blocker are evenly distributed in a set of concentric circles, and the flushing holes 19 are provided on the purge pipe 3, and the distribution position of the flushing holes 19 matches that of each vertical pipe 9.

[0039] like Figure 5 As shown, in the water inlet system, the water distribution pipe 11 includes a main water distribution pipe 16 and multiple branch water distribution pipes 17. The main water distribution pipe 16 is connected to the water inlet pipe 1, and each branch water distribution pipe 17 is connected to the main water distribution pipe 16. The main water distribution pipe 16 and the branch water distribution pipes 17 are respectively provided with a number of water distribution holes 12. Each branch water distribution pipe 17 is symmetrically and spaced apart on both sides of the main water distribution pipe 16.

[0040] In this embodiment, the microorganisms adhering to the diatomaceous earth are nitrifying bacteria. Note: Both diatomaceous earth and nitrifying bacteria are commercially available products.

[0041] The packing layer 14 is in a suspended state under the impact of water flow introduced into the water inlet system; the packing layer 14 is divided into an upper suspended layer and a lower suspended layer in the suspended state, wherein the upper suspended layer is made of 300 mesh diatomaceous earth and the lower suspended layer is made of 200 mesh diatomaceous earth.

[0042] like Figure 1 As shown, in the rigid support 6, the floating body 10 is located at the top of the rigid support 6, the upper end of the reactor body 4 is fixedly supported on the upper part of the rigid support 6, and the lower end of the reactor body 4 is fixedly supported on the lower part of the rigid support 6; the bottom wall of the reactor body 4 is provided with a fall prevention tightening rope (not shown in the figure).

[0043] The reactor body 4 is cylindrical, with a diameter of 1-6 meters and a height of 1-3 meters. Additionally, a screen (not shown in the figure) is installed before the inlet pipe 1.

[0044] The upper part of the reactor body 4 is also provided with an overflow trough or overflow pipe 18 connected to the outlet pipe. The overflow trough or overflow pipe 18 is located between the rotary backwashing device and the outlet pipe 5.

[0045] The key points of this specific example are as follows:

[0046] (1) Water Inlet System: Taking a biochemical reactor with a diameter of 3 meters and a height of 1.5 meters as an example, the main water distribution pipe 16 is a plastic pipe with an outer diameter of 75 mm, the branch water distribution pipe 17 is a plastic pipe with an outer diameter of 32 mm, the water distribution hole 12 has a diameter of 10 mm, the service area of ​​each hole is 0.23 square meters, the total number of holes is 31, and the perforation flow velocity is controlled at 1.0 m / s. The water inlet system is controlled by intermittently starting and stopping the water pump 15, specifically in a cyclic operation mode of starting for 2 minutes and stopping for 8 minutes.

[0047] (2) Packing layer: 6 kg of 200 mesh diatomaceous earth and 300 mesh diatomaceous earth are added respectively; in the suspended state, a lower suspended layer of 200 mesh diatomaceous earth with a concentration of 1500-2000 mg / L is formed in the area 0-300 mm from the bottom of the reactor body 4; an upper suspended layer of 300 mesh diatomaceous earth with a concentration of 1500-2000 mg / L is formed in the area 300-700 mm from the bottom of the reactor body 4; the nitrifying bacteria adhering to the diatomaceous earth particles will continue to grow; when water is fed in, the diatomaceous earth will be suspended under the impact of the water flow at the bottom to form a fluidized bed, and will sink when the water is stopped. In this way, a continuous microbial layer that is continuously compressed downwards will be formed on the water that has just entered the reactor body 4, and it will fully contact, absorb and degrade the pollutants in the feed water.

[0048] (3) Water discharge: Taking a biochemical reactor with a diameter of 3 meters and a height of 1.5 meters as an example, all the water discharged from the top of the overflow tank or overflow pipe 18 is collected and discharged into the PVC water outlet pipe 5, and finally discharged into the water body.

[0049] The specific usage process of this embodiment is as follows:

[0050] After assembling the bioreactor of this embodiment, it is placed in a natural water body. The water can be pre-aerated as needed. Water is intermittently introduced into the reactor body 4 through the water inlet system, forming an intermittent upward flow of water from the bottom. The diatomaceous earth in the packing layer 14 will be suspended under the impact of the water flow to form a fluidized bed, and will sink when the water inlet stops. This will form a continuous microbial layer that is continuously compressed downwards for the water that has just entered the reactor body 4, and fully contact, absorb and degrade the pollutants in the inlet water. The nitrifying bacteria on the diatomaceous earth will play a role in the biochemical reaction. The water flows through the turbulence baffle 2 to achieve efficient solid-liquid separation, and the effluent is finally discharged into the natural water body through the overflow trough or overflow pipe 18 and the effluent pipe 5.

[0051] In addition to the embodiments described above, this utility model may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A biochemical reactor specifically designed for the purification of natural water bodies, comprising a reactor body, an influent system, and a packing layer, characterized in that, It also includes a turbulence baffle and a rotary backwashing device; the reactor body is surrounded by a flexible wall, with an open upper end and a closed lower end. The upper end of the reactor body is fixedly supported on a rigid support, which has a floating body; the water inlet system is located at the bottom of the reactor body, and includes a water pump, an inlet pipe, and a distribution pipe connected in sequence. The water pump is located outside the reactor body, the inlet pipe passes through the wall of the reactor body and is sealed and fixed to the wall, and the distribution pipe is located inside the reactor body and is arranged horizontally. Water distribution holes; the turbulence blocker is located at the upper part of the reactor body, and the outer edge of the turbulence blocker is sealed to the wall of the reactor body. The turbulence blocker has several parallel vertical pipes arranged in a honeycomb pattern; the rotary backwashing device is located above the turbulence blocker and has flushing holes facing the turbulence blocker; the packing layer is located below the turbulence blocker and the packing layer is made of diatomaceous earth; the reactor body is provided with an outlet pipe leading to the outside above the rotary backwashing device. The outlet pipe passes through the wall of the reactor body and is sealed and fixed to the wall.

2. A biochemical reactor specifically designed for purifying natural water bodies according to claim 1, characterized in that, In the water inlet system, the water distribution pipe includes a main water distribution pipe and multiple branch water distribution pipes. The main water distribution pipe is connected to the water inlet pipe, and each branch water distribution pipe is connected to the main water distribution pipe. The main water distribution pipe and the branch water distribution pipes are respectively provided with a number of water distribution holes. Each branch water distribution pipe is symmetrically and spaced apart on both sides of the main water distribution pipe.

3. A biochemical reactor specifically designed for purifying natural water bodies according to claim 1, characterized in that, The reactor body has a cable tightening structure corresponding to the turbulence blocker. The cable tightening structure includes an upper positioning cable and a lower positioning cable. The outer edge of the turbulence blocker has an upper groove that matches the upper positioning cable, and the outer edge of the turbulence blocker has a lower groove that matches the lower positioning cable. Under the combined action of the upper positioning cable and the upper groove, and under the combined action of the lower positioning cable and the lower groove, the outer edge of the turbulence blocker is sealed to the reactor body wall.

4. A biochemical reactor specifically for purifying natural water bodies according to claim 3, characterized in that, in In the turbulence blocker, the cross-section of each vertical pipe is polygonal with a side length of 3 to 8 cm; the length of each vertical pipe is 0.3 to 0.5 m; the turbulence blocker is made of pressed plastic plates that are heat-sealed together.

5. A biochemical reactor specifically for purifying natural water bodies according to claim 3, characterized in that, The rotary backwashing device includes a rotating body and at least one purge pipe; the central part of the turbulence blocker is a solid structure, and the rotating body is supported on the central part of the turbulence blocker; the rotating body has a rotary motor, and the output shaft of the rotary motor is connected to the purge pipe for transmission. Under the drive of the rotary motor, the purge pipe moves in a circular motion around the axis of the rotating body; the rotating body is provided with a water pipe, and the water pipe has a solenoid valve. The inlet of the water pipe is connected to an external pressurized water source, and the outlet is connected to the purge pipe; the vertical pipes of the turbulence blocker are evenly distributed in a set of concentric circles, and the flushing holes are located on the purge pipe, and the distribution position of the flushing holes matches that of each vertical pipe.

6. A biochemical reactor specifically for purifying natural water bodies according to any one of claims 1 to 5, characterized in that, The filler layer is in a suspended state under the impact of water flow introduced into the water inlet system; the filler layer is divided into an upper suspended layer and a lower suspended layer in the suspended state, wherein the upper suspended layer mainly uses 300-mesh diatomaceous earth and the lower suspended layer mainly uses 200-mesh diatomaceous earth.

7. A biochemical reactor specifically for purifying natural water bodies according to any one of claims 1 to 5, characterized in that, in In the rigid support, the floating body is located at the top of the rigid support, the upper end of the reactor body is fixedly supported on the upper part of the rigid support, and the lower end of the reactor body is fixedly supported on the lower part of the rigid support.

8. A biochemical reactor specifically for purifying natural water bodies according to claim 7, characterized in that, The bottom wall of the reactor body is equipped with a fall-prevention tightening rope.

9. A biochemical reactor specifically designed for purifying natural water bodies according to any one of claims 1 to 5, characterized in that, The reactor body is cylindrical, with a diameter of 1-6 meters and a height of 1-3 meters; a grid is provided in front of the water inlet pipe.

10. A biochemical reactor specifically for purifying natural water bodies according to any one of claims 1 to 5, characterized in that, The upper part of the reactor body is also provided with an overflow trough or overflow pipe that is connected to the water outlet pipe. The overflow trough or overflow pipe is located between the rotary backwashing device and the water outlet pipe.

Images