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 utility model relates to a device for biochemical treatment of sewage, anaerobic fermentation treatment of 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 widely used in sewage treatment and organic waste disposal. 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. Anaerobic technology is often used to treat high-concentration organic sewage and organic waste.

[0003] Most existing anaerobic reactors utilize an upflow principle, with material discharge at the top. This method causes muddy water to flow upward from the bottom, causing lighter anaerobic bacteria to be lost with the discharge, while heavier anaerobic bacteria settle to the bottom and accumulate. This leaves most anaerobic bacteria unused, failing to address the problem of bottom material accumulation. This makes it unsuitable for treating high-concentration water or wastewater with poor biodegradability. Furthermore, the anaerobic fermentation process suffers from uneven mass transfer, resulting in poor degradation. The reactor is also unsuitable for materials with high viscosity or high solids content.

[0004] CN106281986A discloses a "High-Solid Spiral Anaerobic Reactor" comprising a tank body and at least one circulating lifting and disturbance unit, each of which is arranged in the tank body; the circulating lifting and disturbance unit comprises a transmission device, a material guide barrel, a rotating shaft and spiral blades, the transmission device is mounted on the top cover of the tank body, the rotating shaft is connected to the output end of the transmission device, the portion of the rotating shaft within the tank body is provided with spiral blades, the rotating shaft and the spiral blades are arranged in the material guide barrel, the upper and lower portions of the material guide barrel are provided with a discharge port and a feed port respectively, and the material guide barrel is arranged on the transmission device. This device causes the material to tumble and stir as a whole from bottom to top. Although it is suitable for the fermentation treatment of solid wastes with high viscosity or high solid content, such as slurry and high paste, the tumbling cycle intensity of the material is not high, and the mass transfer efficiency and degradation effect need to be improved. The "High-Solid Circulating Anaerobic Reactor" disclosed in CN106281988A has the same problem.

[0005] CN117511707A discloses a "Graded Phase-Separated Push-Flow Anaerobic Reactor and Anaerobic Reaction Process." Materials flow from the feed inlet into the high-temperature hydrolysis zone, then pass through the top of the baffle and through the through-holes, sequentially through the primary and secondary anaerobic zones, and finally overflow from the top of the overflow plate into the temporary storage tank. During this process, the materials undergo push-flow digestion, achieving graded phase separation. Clearly, despite the numerous advantages of this improved anaerobic reactor, it still suffers from insufficiently strong and intense mixing and circulating mass transfer, resulting in suboptimal processing capacity and efficiency. Utility Model Content

[0006] The utility model aims at the deficiencies of the existing anaerobic fermentation reaction technology and 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 this utility model adopts the following technical solutions:

[0008] The anaerobic reactor comprises an outer shell, the bottom of which is provided with a feeding pipe and a discharging pipe, and the upper portion is provided with an exhaust port; the interior of the outer shell is provided with a reflux cylinder, 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 an upflow area; the exterior of the outer shell is provided with a hydraulic lifting device, the hydraulic lifting device is provided with a suction pipe and a discharge pipe, 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 provided 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 portion 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] Both the suction pipe and the discharge pipe are 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 provided 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 discharge pipe are provided on the other side of the suction and push cylinder. The piston rod of the hydraulic cylinder drives the push shaft to reciprocate within 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 through the discharge pipe. The hydraulic drive is used to achieve a large flow rate of strong circulation mass transfer of materials in the upflow area 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 materials 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 feed pipe, rises in the upflow area and enters the reflux cylinder, is sucked into the suction and push cylinder through the suction pipe, and is then pushed into the upflow area through the discharge pipe. After rising in the upflow area, it enters the reflux cylinder and is again sucked into the suction and push cylinder through the suction pipe. This push-suction cycle forms a continuous circulation and tumbling of the material within the shell at a flow rate more than twice the rate of complete mass transfer in 24 hours, achieving intense mass transfer and improving the efficiency and effectiveness of anaerobic fermentation. The biogas produced by the fermentation is discharged through the exhaust port, and the fermentation mixture is discharged through the discharge pipe.

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

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

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

[0021] In the figure: 1. Shell, 2. Upflow area, 3. Return cylinder, 4. Hydraulic cylinder, 5. Piston rod, 6. Stop valve, 7. Push shaft, 8. Suction and push cylinder, 9. Discharge one-way valve, 10. Discharge pipe, 11. Suction pipe, 12. Biogas space, 13. Exhaust port, 14. Suction one-way valve, 15. Return hole, 16. Discharge pipe, 17. Feed 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 shell 1, and a feeding pipe 17 and a discharge pipe 16 are provided at the bottom of the shell 1 (see Figure 2 ), an exhaust port 13 is provided at the top. The feeding pipe 17 and the discharge pipe 16 are diagonally distributed, and both are provided with stop valves. 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 storage.

[0023] Inside the housing 1, a reflux drum 3 is installed. The bottom end of the drum is closed, and the top end is open. The drum 3 is fixed to the interior of the housing 1. The area between the drum 3 and the inner wall of the housing 1 is the upflow zone 2. To accelerate the return of the supernatant, the upper portion of the drum is provided with evenly distributed reflux holes 15 above one-fifth of its height.

[0024] The outer surface of the housing 1 is provided with a plurality of ( Figure 2A hydraulic lifting device (six in total, preferably 3-8) is installed. This device is equipped with a suction pipe 11 and a discharge pipe 10. Each suction pipe 11 and discharge pipe 10 is equipped with a suction check valve 14 and a discharge check valve 9, respectively. The suction pipe 11 extends into the reflux drum 3. The discharge pipe 10 extends into the bottom of the upflow zone 2 (the inner bottom of the housing 1). The discharge pipe 10 extends into the bottom of the upflow zone 2 in the same tangential direction as the inner wall of the housing. To facilitate disassembly and maintenance of the hydraulic lifting device, both the suction pipe 11 and the discharge pipe 10 are equipped with stop valves 6. During maintenance, these stop valves 6 should be closed to prevent material from flowing out.

[0025] The hydraulic lifting device includes a suction and push cylinder 8 and a hydraulic cylinder 4, which can be mounted on the suction and push cylinder 8. A push shaft 7 is installed within the suction and push cylinder 8, extending from one side of the cylinder and connected to the piston rod 5 of the hydraulic cylinder 4. A suction pipe 11 and a discharge pipe 10 are installed on the other side of the cylinder. The piston rod of the hydraulic cylinder 4 drives the push shaft 7 to reciprocate within the suction and push cylinder 8, drawing material from the reflux cylinder 3 into the suction and push cylinder 8 through the suction pipe 11 (when the push shaft 7 is absorbing material, the intake check valve 14 opens and the discharge check valve 9 closes). The material is then pushed from the suction and push cylinder 8 through the discharge pipe 10 into the upflow zone 2 (when the push shaft 7 is pushing material, the intake check valve 14 closes and the discharge check valve 9 opens). In the upflow zone 2, the material surges forward and upward along the outer shell, overflowing into the reflux cylinder 3, where it circulates vigorously and at high flow rates 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 feeding pipe 17. After entering the shell 1, the material rises and enters the reflux cylinder 3 from the top. The high-flow strong pushing device is activated, and the material is sucked into the suction and push cylinder 8 through the suction pipe 11. Then, it is 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. Under the action of gravity and the suction of the suction pipe 11, it falls 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% of the volume m 3 The continuous circulation with a flow rate of more than 1 / hour and large tumbling amplitude achieves full mixing of materials and strong mass transfer, which increases the mass transfer efficiency exponentially and improves the efficiency and effect of anaerobic fermentation.

[0028] The biogas produced 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 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 discharge pipe are provided at the bottom of the outer shell, and an exhaust port is provided at the upper part; a reflux cylinder is provided 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 provided outside the outer shell, and a suction pipe and a discharge pipe are provided 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, characterized in that: A biogas accommodating space is provided 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, characterized in that: A reflux hole is provided on the upper portion of the reflux cylinder.

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

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

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