Hydraulic strong mass transfer anaerobic reactor

Abstract

The hydraulic strong mass transfer anaerobic reactor comprises a shell, a feeding pipe and a discharging pipe are arranged at the bottom of the shell, and an exhaust port is formed in the upper part of the shell; a backflow cylinder is arranged in the shell, the bottom end of the backflow cylinder is closed, the upper end of the backflow cylinder is open, and the area between the backflow cylinder and the inner wall of the shell is an up-flow area. A hydraulic pushing and lifting device is arranged outside the shell, a material suction pipe and a discharging pipe are arranged on the hydraulic pushing and lifting device, the material suction pipe stretches into the backflow cylinder, and the discharging pipe stretches into the bottom of the flow rising area. Materials to be fermented enter the shell through the feeding pipe, ascend in the ascending area to enter the backflow barrel, are sucked into the suction and push barrel through the suction pipe, are pushed into the ascending area through the discharging pipe, ascend in the ascending area to enter the backflow barrel and are sucked into the suction and push barrel again through the suction pipe, and large-flow continuous circulating turning of the materials in the shell is formed. According to the equipment, the materials are violently, efficiently and continuously mixed and transferred through large-flow circulating pushing and sucking of the materials, so that the anaerobic fermentation efficiency and effect are greatly improved.

Description

Technical Field

[0001] The invention relates to a device for anaerobic fermentation treatment of sewage biochemical treatment, organic waste and the like, belonging to the technical field of anaerobic fermentation reaction. Background Art

[0002] Anaerobic fermentation is an important biochemical treatment method, which is widely used in sewage treatment, organic waste treatment and other fields. Under anaerobic conditions, anaerobic bacteria decompose organic matter to produce methane, carbon dioxide and water. It is characterized by low energy consumption and high efficiency. High-concentration organic sewage and organic waste disposal are usually treated with anaerobic technology.

[0003] Most existing anaerobic reactors use the principle of upflow and discharge materials at the top. In this way, muddy water flows upward from the bottom to the top, causing the lighter anaerobic bacteria to be lost with the discharge, while the heavier anaerobic bacteria settle to the bottom and accumulate at the bottom, making most anaerobic bacteria unusable and unable to solve the problem of material accumulation at the bottom. It is not suitable for the treatment of high-concentration water quality and poor biodegradability sewage. In addition, the mass transfer is uneven during the anaerobic fermentation process, the degradation effect is poor, and it is not suitable for materials with high viscosity or high solid content.

[0004] CN106281986A discloses a "high-solid spiral anaerobic reactor", which includes a tank body and at least one circulation lifting disturbance unit, each of which is arranged in the tank body; the circulation lifting disturbance unit includes a transmission device, a material guide cylinder, a rotating shaft and a spiral blade, the transmission device is installed on the top cover of the tank body, the rotating shaft is connected to the output end of the transmission device, the part of the rotating shaft in the tank body is provided with a spiral blade, the rotating shaft and the spiral blade are arranged in the material guide cylinder, the upper and lower parts of the material guide cylinder are respectively provided with a discharge port and a feed port, and the material guide cylinder is arranged on the transmission device. The device causes the material to form an overall tumbling and stirring from bottom to top. Although it is suitable for the fermentation treatment of solid wastes with high viscosity or high solid content such as muddy and high-paste, the circulation intensity of the material rolling up and down is not large, and the mass transfer efficiency and degradation effect need to be improved. The "high-solid circulation anaerobic reactor" disclosed in CN106281988A has the same problem.

[0005] According to the "A Grading and Phase Separation Plug Flow Anaerobic Reactor and Anaerobic Reaction Process" disclosed in CN117511707A, the material flows from the feed port into the high-temperature hydrolysis zone, then passes through the primary anaerobic zone and the secondary anaerobic zone in sequence through the top of the baffle and the through hole, and finally overflows from the top of the overflow plate into the temporary storage tank. During the process of moving, the material is plugged and digested to achieve grading and phase separation. Obviously, although the anaerobic reactor has many advantages after improvement, there are still problems such as the mixing and circulating mass transfer power is not strong and violent enough, and the processing capacity and efficiency are not ideal. Summary of the invention

[0006] Aiming at the shortcomings of the existing anaerobic fermentation reaction technology, the present invention provides a hydraulic strong mass transfer anaerobic reactor with strong and violent mass transfer, large processing capacity and high efficiency.

[0007] The hydraulic strong mass transfer anaerobic reactor of the present invention adopts the following technical scheme:

[0008] The anaerobic reactor comprises an outer shell, wherein a feeding pipe and a discharging pipe are arranged at the bottom of the outer shell, and an exhaust port is arranged at the top; a reflux cylinder is arranged inside the outer shell, the bottom end of the reflux cylinder is closed, the top end is open, and the area between the reflux cylinder and the inner wall of the outer shell is an upflow area; a hydraulic lifting device is arranged outside the outer shell, and a suction pipe and a discharge pipe are arranged on the hydraulic lifting device, the suction pipe extends into the reflux cylinder, and the discharge pipe extends into the bottom of the upflow area.

[0009] A biogas containing space is arranged above the reflux cylinder in the shell. The top of the shell is dome-shaped.

[0010] The feeding pipe and the discharging pipe are distributed diagonally.

[0011] The feeding pipe and the discharging pipe are both provided with stop valves.

[0012] A reflux hole is provided at the upper part of the reflux cylinder (about one fifth of the total height) to accelerate the reflux of the supernatant.

[0013] The suction pipe and the discharge pipe are respectively provided with a suction one-way valve and a discharge one-way valve.

[0014] The bottom of the discharge pipe extending into the upflow zone is consistent with the tangent direction of the inner wall of the shell.

[0015] The suction pipe and the discharge pipe are both provided with stop valves to prevent the material from flowing out when the hydraulic lifting device is disassembled and repaired.

[0016] The hydraulic lifting device includes a suction and push cylinder and a hydraulic cylinder. A push shaft is arranged in the suction and push cylinder. The push shaft extends out of one side of the suction and push cylinder and is connected to the piston rod of the hydraulic cylinder. The suction pipe and the discharge pipe are arranged on the other side of the suction and push cylinder. The piston rod of the hydraulic cylinder drives the push shaft to reciprocate in the suction and push cylinder, so that the material in the reflux cylinder is sucked into the suction and push cylinder through the suction pipe and then pushed into the upflow area by the discharge pipe. The hydraulic drive is used to realize the strong circulation mass transfer of the material in the upflow area with a large flow rate through the reflux cylinder. The use of hydraulic pressure as the driving force can greatly increase the volume of the suction and push cylinder, and the circulation mass transfer of the material in the upflow area can reach more than twice the complete mass transfer within 24 hours.

[0017] The material to be fermented (high-concentration sewage, high-solid content organic matter) enters the shell through the feeding pipe, rises in the upflow area and enters the reflux cylinder, is sucked into the suction and push cylinder through the suction pipe, and then is pushed into the upflow area through the discharge pipe. After rising in the upflow area, it enters the reflux cylinder and is sucked into the suction and push cylinder again through the suction pipe. This push-suction cycle forms a continuous circulation and tumbling of the material in the shell at a flow rate more than twice the complete mass transfer within 24 hours, achieving intense mass transfer of the material and improving the efficiency and effect of anaerobic fermentation. The biogas produced by fermentation is discharged from the exhaust port, and the fermentation mixture is discharged from the discharge pipe.

[0018] The present invention achieves intense and efficient continuous mixing and mass transfer of the fermentation materials in an unobstructed state by circulating and pushing the fermentation materials at a large flow rate, thereby greatly improving the efficiency and effect of anaerobic fermentation. The invention is particularly suitable for the fermentation treatment of organic matter with high viscosity or high solid content such as muddy and highly pasty materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the hydraulic strong mass transfer anaerobic reactor of the present invention.

[0020] Figure 2 yes Figure 1 Cross-sectional top view.

[0021] In the figure: 1. shell, 2. upflow area, 3. reflux cylinder, 4. hydraulic cylinder, 5. piston rod, 6. stop valve, 7. push shaft, 8. suction push cylinder, 9. discharge check valve, 10. discharge pipe, 11. suction pipe, 12. biogas space, 13. exhaust port, 14. suction check valve, 15. reflux hole, 16. discharge pipe, 17. feeding pipe. DETAILED DESCRIPTION

[0022] like Figure 1 and Figure 2 As shown, the hydraulic strong mass transfer anaerobic reactor of the present invention comprises a housing 1, and a feeding pipe 17 and a discharge pipe 16 are arranged at the bottom of the housing 1 (see Figure 2 ), an exhaust port 13 is arranged at the top. The feeding pipe 17 and the discharging pipe 16 are diagonally distributed, and a stop valve is arranged on each of them. A biogas space 12 for accommodating biogas is reserved at the top of the housing 1, and a dome-shaped structure can be used as a gas bin.

[0023] A reflux cylinder 3 is provided inside the housing 1, and the bottom end of the reflux cylinder 3 is closed and the top end is open. The reflux cylinder 3 is fixed inside the housing 1. The area between the reflux cylinder 3 and the inner wall of the housing 1 is the upflow area 2. In order to accelerate the reflux of the supernatant, the upper part of the reflux cylinder is provided with evenly distributed reflux holes 15 above one-fifth of the height.

[0024] The outer surface of the housing 1 is provided with a plurality of ( Figure 2A hydraulic lifting device is provided (6 in total, preferably 3-8 in total), and a suction pipe 11 and a discharge pipe 10 are provided on the lifting device. A suction check valve 14 and a discharge check valve 9 are provided on the suction pipe 11 and the discharge pipe 10, respectively, and the suction pipe 11 extends into the reflux cylinder 3. The discharge pipe 10 extends into the bottom of the upflow area 2 (the inner bottom of the shell 1), and the discharge pipe 10 extends into the bottom of the upflow area 2 in the same tangent direction as the inner wall of the shell. In order to facilitate the disassembly and maintenance of the hydraulic lifting device, a stop valve 6 is provided on the suction pipe 11 and the discharge pipe 10. The stop valve 6 is closed during maintenance to prevent the material from flowing out.

[0025] The hydraulic lifting device includes a suction and push cylinder 8 and a hydraulic cylinder 4, and the hydraulic cylinder 4 can be installed on the suction and push cylinder 8. A push shaft 7 is arranged in the suction and push cylinder 8, and the push shaft 7 extends out of one side of the suction and push cylinder 8 and is connected to the piston rod 5 of the hydraulic cylinder 4. A suction pipe 11 and a discharge pipe 10 are arranged on the other side of the suction and push cylinder 8. The piston rod of the hydraulic cylinder 4 drives the push shaft 7 to move back and forth in the suction and push cylinder 8, so that the material in the reflux cylinder 3 is sucked into the suction and push cylinder 8 through the suction pipe 11 (when the push shaft 7 is sucking, the suction check valve 14 is opened and the discharge check valve 9 is closed), and then pushed into the upflow area 2 through the discharge pipe 10 from the suction and push cylinder 8 (when the push shaft 7 is pushing, the suction check valve 14 is closed and the discharge check valve 9 is opened). The material is pushed forward and upward along the shell in the upflow area 2, and the upflow overflow enters the reflux cylinder 3, and circulates strongly with a large flow inside and outside the reflux cylinder 3. Since the hydraulic cylinder 4 is used as the driving force, the volume of the suction and push cylinder 8 can be greatly increased, and the mass transfer rate reaches a flow rate m of 5% of the volume of the shell. 3 / hour or more.

[0026] The operation process of the above equipment is as follows.

[0027] The material to be fermented (high-concentration sewage, high-solid content organic matter, etc.) enters the bottom of the upflow area 2 in the shell 1 through the feed pipe 17. After entering the shell 1, the material rises and enters the reflux cylinder 3 from the top. The large-flow strong push-up device is started, and it is sucked into the suction and push cylinder 8 through the suction pipe 11, and then pushed into the upflow area 2 through the discharge pipe 4, rises in the upflow area 2, and enters the reflux cylinder 3 after reaching the top of the reflux cylinder 3. It falls under the action of gravity and the suction of the suction pipe 11, and is sucked into the suction and push cylinder 8 again. In this way, the material is formed in the shell 1 at a flow rate of 5% by volume m 3 The continuous circulation of more than 1000 liters per hour and large circulation amplitude can achieve full mixing of materials, strong mass transfer, and geometric increase in mass transfer efficiency, thus improving the efficiency and effect of anaerobic fermentation.

[0028] The biogas generated by the fermentation is discharged from the exhaust port 13. After the fermentation is completed, the sewage valve is opened, and the biogas residue and biogas liquid mixture is discharged from the discharge pipe 16.

Claims

1. A hydraulic strong mass transfer anaerobic reactor, characterized by: It includes an outer shell, a feeding pipe and a discharging pipe are arranged at the bottom of the outer shell, and an exhaust port is arranged at the top; a reflux cylinder is arranged inside the outer shell, the bottom end of the reflux cylinder is closed, the upper end is open, and the area between the reflux cylinder and the inner wall of the outer shell is the upflow area; a hydraulic pushing device is arranged outside the outer shell, and a suction pipe and a discharge pipe are arranged on the hydraulic pushing device, the suction pipe extends into the reflux cylinder, and the discharge pipe extends into the bottom of the upflow area.

2. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: A biogas containing space is arranged above the reflux cylinder in the shell.

3. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: The top of the shell is dome-shaped.

4. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: The feeding pipe and the discharging pipe are distributed diagonally.

5. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: The feeding pipe and the discharging pipe are both provided with stop valves.

6. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: A reflux hole is provided on the upper part of the reflux cylinder.

7. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: The suction pipe and the discharge pipe are respectively provided with a suction one-way valve and a discharge one-way valve.

8. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: The bottom of the discharge pipe extending into the upflow zone is consistent with the tangent direction of the inner wall of the shell.

9. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: The suction pipe and the discharge pipe are both provided with stop valves.

10. The hydraulic strong mass transfer anaerobic reactor according to claim 1 is characterized in that: The hydraulic lifting device comprises a suction and pushing cylinder and a hydraulic cylinder. A pushing shaft is arranged in the suction and pushing cylinder. The pushing shaft extends out of one side of the suction and pushing cylinder and is connected to the piston rod of the hydraulic cylinder. The discharge pipe and the suction pipe are arranged on the other side of the suction and pushing cylinder.

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