An upflow multistage IC anaerobic tower

Abstract

The application discloses an upflow multistage IC anaerobic tower, and belongs to the technical field of sewage treatment equipment. The IC anaerobic tower comprises a tower body, a tower top provided on the tower body, a biogas chamber provided on the tower top and communicated with an exhaust pipe provided on the tower top, an outer layer, and an inner layer provided in the outer layer. The outer layer, the inner layer and the tower top enclose a pressure regulating area, and the inner layer and the tower top enclose a gas storage area. The pressure regulating area and the gas storage area are mutually closed. The biogas chamber is provided with an air inlet pipe corresponding to the position of the tower top. The tower top of the application is in a fully closed form, which completely avoids the leakage of biogas in the tower. Air is prevented from entering the tower from the tower top, which reduces the possibility of electrochemical corrosion of the gas-water interface in the tower, greatly prolongs the service life of the tower body and reduces the occurrence of accidents. In addition, the fully closed tower top structure can completely avoid the overflow of odor generated by the reaction in the tower body.

Description

Technical Field

[0001] This invention belongs to the technical field of wastewater treatment equipment, specifically relating to an upstream multi-stage IC anaerobic tower. Background Technology

[0002] An internal circulation (IC) anaerobic reactor is used to treat organic wastewater. The organic wastewater circulates within the IC anaerobic reactor, which contains anaerobic microorganisms. These microorganisms degrade the organic matter in the wastewater into biogas and inorganic substances, achieving compliant discharge. IC anaerobic reactors are widely used in the papermaking industry.

[0003] The existing IC anaerobic tower uses a movable hatch structure at the top, which poses a problem of biogas leakage.

[0004] CN214654289U discloses an IC anaerobic tower, including a tower body with a hollow cylindrical structure. A gas-liquid separator, also a hollow cylindrical structure, is located at the top of the tower body. Multiple pipes are installed inside the gas-liquid separator. An inlet pipe is connected in series to one side of the bottom of the tower body, and an outlet pipe is connected in series to one side of the gas-liquid separator. A biogas collection pipe is connected in series to the top of the gas-liquid separator. The inlet, outlet, and biogas collection pipes are made of metal. The tower body contains a mixing zone, a first anaerobic zone at the top of the mixing zone, a second anaerobic zone at the top of the first anaerobic zone, a sedimentation zone at the top of the second anaerobic zone, and a gas-liquid separation zone at the top of the sedimentation zone. This IC anaerobic tower, through its first and second anaerobic zones, allows for zoned treatment of wastewater, improving wastewater treatment efficiency. Furthermore, the tower has fewer internal components, making it easy to install and operate, and is highly practical.

[0005] In the aforementioned patent document's technical solution, the gas-liquid separator located at the top of the tower sends the biogas generated inside the tower to the biogas tank located outside the tower via a biogas collection pipe, resulting in insufficient space utilization. Summary of the Invention

[0006] This invention provides an upflow multi-stage IC anaerobic tower to solve the above-mentioned technical problems.

[0007] To solve the above technical problems, the present invention adopts the following technical solution:

[0008] An upflow multi-stage IC anaerobic tower includes a tower body, a tower top located on the tower body, and a biogas chamber located on the tower top and connected to an exhaust pipe located on the tower top. It also includes an outer layer and an inner layer located within the outer layer. The outer layer, the inner layer, and the tower top form a pressure regulating zone, and the inner layer and the tower top form a gas storage zone. The pressure regulating zone and the gas storage zone are mutually enclosed. An inlet pipe is provided in the biogas chamber corresponding to the position of the tower top.

[0009] Furthermore, the biogas chamber is hemispherical, with a diameter 0.3-0.7 times that of the tower body.

[0010] Furthermore, the top of the tower has an umbrella-shaped structure that is high in the middle and low around the edges; the biogas chamber is located in the central area of ​​the top of the tower, and the longitudinal centerlines of the tower body, the top of the tower, and the biogas chamber coincide.

[0011] Furthermore, the biogas chamber also includes a first pressure sensor 8, which is disposed on the inner wall of the outer layer.

[0012] Furthermore, the biogas chamber also includes a second pressure sensor 9, which is disposed on the inner wall of the inner layer.

[0013] Further, the outer layer 32 is made of the following raw materials in parts by weight: 80-95 parts polyester fiber, 10-15 parts polyvinyl chloride, 4-8 parts epoxy resin, 32-55 parts plasticizer, 0.5-1 part ultraviolet absorber, 0.5-1.5 parts antioxidant, and 3-6 parts flame retardant.

[0014] Furthermore, the outer layer 32 also contains carbon fibers, which account for 8-15% of the weight of the polyester fibers used.

[0015] Further, the plasticizer is at least one of diisobutyl phthalate, dioctyl phthalate, and polyethylene terephthalate.

[0016] Furthermore, the outer layer 32 also includes a coating layer 321 covering its outer side;

[0017] Furthermore, the coating layer 321 is made of the following raw materials by weight: 25-40 parts of polyvinylidene fluoride, 8-20 parts of polyimide, 1-3 parts of propylene glycol block polyether, and 4-6 parts of titanium dioxide.

[0018] Furthermore, the coating material 321 is 0.2-0.4 times the thickness of the outer layer 32.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The top structure of the anaerobic tower of this application is a fully enclosed form, which completely avoids the leakage of biogas compared with the traditional movable door structure at the top, and realizes the complete collection of biogas produced by the reaction inside the tower; after use and testing, the biogas collection rate of the biogas chamber using the present invention reaches 100%, while the traditional movable type is only 98%.

[0021] 2. The top structure of the anaerobic tower of the present invention is completely enclosed, which can prevent air from entering the tower from the top; this avoids the entry of external air, greatly reducing the possibility of electrochemical corrosion at the gas-water interface inside the tower, thus greatly extending the service life of the tower and reducing the occurrence of accidents; while the top of the traditional anaerobic tower is a movable hatch type, which allows external air to enter the tower, thereby causing electrochemical corrosion and resulting in adverse consequences such as the anaerobic tower not being able to be used normally.

[0022] 3. The outer membrane used in this invention has good tensile strength through the synergistic use of various raw materials; the added coating layer can improve the performance of the outer membrane, reduce the impact of external environmental factors such as wind, rain and sun, and extend its service life. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is the front view of the present invention.

[0025] Figure 2 This is a rear view of the present invention.

[0026] Figure 3 This is the left view of the present invention.

[0027] Reference numerals: 1-Tower body, 2-Tower top, 21-Positive and negative pressure protector, 22-Gas-liquid separator, 23-Exhaust pipe, 24-Inlet pipe, 3-Biogas chamber, 31-Outer layer, 32-Inner layer, 321-Coating layer, 33-Pressure regulating zone, 34-Gas storage zone, 35-Pressure regulating device, 36-Pressure regulating pipeline, 37-First pressure sensor, 38-Second pressure sensor. Detailed Implementation

[0028] To facilitate a better understanding of the present invention, the following examples are provided in conjunction with the accompanying drawings. These examples fall within the scope of protection of the present invention, but do not limit the scope of protection of the present invention.

[0029] Example 1

[0030] An upflow multi-stage IC anaerobic tower includes a tower body 1, a tower top 2 located on the tower body 1, and a biogas chamber 3 located on the tower top 2 and connected to an exhaust pipe 23 located on the tower top 2. It also includes an outer layer 31 and an inner layer 32 located within the outer layer 31. The outer layer 31, the inner layer 32, and the tower top 2 enclose a pressure regulating zone 33, and the inner layer 32 and the tower top 2 enclose a gas storage zone 34. The pressure regulating zone 33 and the gas storage zone 34 are mutually sealed. An air inlet pipe 24 is provided in the biogas chamber 3 at a position corresponding to the tower top 2.

[0031] The biogas chamber 3 is hemispherical, with a diameter 0.3 times that of the tower body 1.

[0032] The top of the tower 2 is an umbrella-shaped structure that is high in the middle and low around the edges; the biogas chamber 3 is located in the central area of ​​the top of the tower 2, and the longitudinal center lines of the tower body 1, the top of the tower 2, and the biogas chamber 3 coincide.

[0033] The biogas chamber 3 also includes a first pressure sensor 37, which is located on the inner wall of the outer layer 31.

[0034] The biogas chamber 3 also includes a second pressure sensor 38, which is located on the inner wall of the inner layer 32.

[0035] The outer layer 32 is made of the following raw materials in parts by weight: 80 parts polyester fiber, 10 parts polyvinyl chloride, 4 parts epoxy resin, 32 parts plasticizer, 0.5 parts ultraviolet absorber, 0.5 parts antioxidant, and 3 parts flame retardant.

[0036] The outer layer 32 also contains carbon fiber, which accounts for 8% of the weight of the polyester fiber used.

[0037] The plasticizer is diisobutyl phthalate.

[0038] The outer layer 32 also includes a coating layer 321 covering its outer side; the coating layer 321 is made of the following raw materials by weight: 25 parts polyvinylidene fluoride, 8 parts polyimide, 1 part propylene glycol block polyether, and 4 parts titanium dioxide.

[0039] The top 2 of the tower is equipped with a positive and negative pressure protector 21 and a gas-liquid separator 22. The positive and negative pressure protector is used to make corresponding pressure adjustments according to the internal pressure of the tower to ensure the normal operation of the tower. The gas-liquid separator is used to separate the gas generated by the reaction in the tower and remove the solution entrained in the gas.

[0040] Valves can be installed on the intake and exhaust pipes; solenoid valves can be used.

[0041] The biogas chamber also includes a pressure regulating device located on the top of the tower, with a pressure regulating pipe running through the outer layer and connected to the pressure regulating zone.

[0042] The exhaust pipe in the biogas chamber is used to discharge the collected biogas to other places for use; the air inlet pipe at the top of the tower allows the biogas generated inside the tower to directly enter the biogas chamber, which not only facilitates collection but also makes the biogas collection more complete.

[0043] Before use, place the biogas chamber on top of the tower. After the biogas chamber is installed, open the valve on the inlet pipe to allow the gas produced by the reaction inside the tower to enter the biogas chamber. When you need to discharge the gas from the biogas chamber for use, simply open the valve on the exhaust pipe.

[0044] The first pressure sensor is used to monitor the air pressure in the outer layer. When the pressure inside the pressure regulating zone is too high, the gas in the pressure regulating zone can be discharged by activating the pressure regulating device. The pressure regulating device is then turned off after the pressure in the pressure regulating zone drops to a suitable range.

[0045] The second pressure sensor is used to monitor the gas pressure in the inner layer. When the pressure inside the inner layer is high, it indicates that the internal biogas pressure is high. At this time, the biogas can be discharged to the external collection box by opening the valve on the exhaust pipe. After the pressure in the inner layer drops to a suitable range, the valve on the exhaust pipe can be closed.

[0046] The top of the tower has a flat installation area, which is the highest point of the tower and is higher than the surrounding area. The flat installation area facilitates the installation of the biogas chamber.

[0047] To improve operational efficiency and the safety of operators, a controller can be installed on the side or outside of the tower. The controller can be connected to positive and negative pressure protectors, pressure regulating devices, solenoid valves, first pressure sensors, and second pressure sensors, so that the start and stop of the above-mentioned electrical components can be controlled by notifying them, thereby improving the convenience of operation.

[0048] Since the top of the tower also houses components such as positive and negative pressure protectors and gas-liquid separators, the diameter of the biogas chamber should be 0.3 times the diameter of the top of the tower, and the longitudinal centerline of the biogas chamber should coincide with the longitudinal centerline of the tower body. This allows sufficient space at the top of the tower for the installation of other components.

[0049] The pressure regulating device, first pressure sensor, second pressure sensor, and solenoid valve involved in this invention are not innovative points created by this invention, and specific models will not be described in detail.

[0050] The improvement of this application lies in the top structure of the tower top, and does not involve the tower body and its internal structure, such as the tower body and its internal structure, which can be made using existing technology.

[0051] Example 2

[0052] An upflow multi-stage IC anaerobic tower has the same top structure as in Example 1, but the diameter of the biogas chamber used is 0.4 times the diameter of the tower body.

[0053] The outer layer 32 is made of the following raw materials in parts by weight: 83 parts polyester fiber, 12 parts polyvinyl chloride, 5 parts epoxy resin, 36 parts plasticizer, 0.6 parts ultraviolet absorber, 0.8 parts antioxidant, and 4 parts flame retardant.

[0054] The outer layer 32 also contains carbon fiber, which accounts for 10% of the weight of the polyester fiber used.

[0055] The plasticizer is at least one of diisobutyl phthalate, dioctyl phthalate, and polyethylene terephthalate.

[0056] The outer layer 32 also includes a coating layer 321 covering its outer side;

[0057] The coating layer 321 is made of the following raw materials by weight: 28 parts polyvinylidene fluoride, 12 parts polyimide, 2 parts propylene glycol block polyether, and 5 parts titanium dioxide.

[0058] The coating material 321 is 0.3 times the thickness of the outer layer 32.

[0059] Example 3

[0060] An upflow multi-stage IC anaerobic tower has the same top structure as in Example 1, but the diameter of the biogas chamber used is 0.5 times the diameter of the tower body.

[0061] The outer layer 32 is made of the following raw materials in parts by weight: 88 parts polyester fiber, 13 parts polyvinyl chloride, 6 parts epoxy resin, 41 parts plasticizer, 0.8 parts ultraviolet absorber, 1.1 parts antioxidant, and 5 parts flame retardant.

[0062] The outer layer 32 also contains carbon fiber, which accounts for 11% of the weight of the polyester fiber used.

[0063] The plasticizer is at least one of diisobutyl phthalate, dioctyl phthalate, and polyethylene terephthalate.

[0064] The outer layer 32 also includes a coating layer 321 covering its outer side;

[0065] The coating layer 321 is made of the following raw materials by weight: 31 parts polyvinylidene fluoride, 15 parts polyimide, 2.5 parts propylene glycol block polyether, and 6 parts titanium dioxide.

[0066] The coating material 321 is 0.4 times the thickness of the outer layer 32.

[0067] Example 4

[0068] An upflow multi-stage IC anaerobic tower has the same top structure as in Example 1, but the diameter of the biogas chamber used is 0.6 times the diameter of the tower body.

[0069] The outer layer 32 is made of the following raw materials in parts by weight: 90 parts polyester fiber, 14 parts polyvinyl chloride, 7 parts epoxy resin, 46 parts plasticizer, 3 parts ultraviolet absorber, 1.3 parts antioxidant, and 6 parts flame retardant.

[0070] The outer layer 32 also contains carbon fiber, which accounts for 14% of the weight of the polyester fiber used.

[0071] The plasticizer is at least one of diisobutyl phthalate, dioctyl phthalate, and polyethylene terephthalate.

[0072] The outer layer 32 also includes a coating layer 321 covering its outer side;

[0073] The coating layer 321 is made of the following raw materials by weight: 40 parts polyvinylidene fluoride, 18 parts polyimide, 3 parts propylene glycol block polyether, and 6 parts titanium dioxide.

[0074] The coating material 321 is 0.4 times the thickness of the outer layer 32.

[0075] Example 5

[0076] An upflow multi-stage IC anaerobic tower has the same top structure as in Example 1, but the diameter of the biogas chamber used is 0.7 times the diameter of the tower body.

[0077] The outer layer 32 is made of the following raw materials in parts by weight: 95 parts polyester fiber, 15 parts polyvinyl chloride, 8 parts epoxy resin, 55 parts plasticizer, 1 part ultraviolet absorber, 1.5 parts antioxidant, and 5 parts flame retardant.

[0078] The outer layer 32 also contains carbon fiber, which accounts for 15% of the weight of the polyester fiber used.

[0079] The plasticizers are diisobutyl phthalate, dioctyl phthalate, and polyethylene terephthalate.

[0080] The outer layer 32 also includes a coating layer 321 covering its outer side;

[0081] The coating layer 321 is made of the following raw materials by weight: 36 parts polyvinylidene fluoride, 17 parts polyimide, 2 parts propylene glycol block polyether, and 4.5 parts titanium dioxide.

[0082] The coating material 321 is 0.3 times the thickness of the outer layer 32.

[0083] The coating material 321 is 0.2 times the thickness of the outer layer 32.

[0084] The ultraviolet absorbers, antioxidants, and flame retardants used in Examples 1-5 above are all existing ingredients, and can be ultraviolet absorber UV-P, phenolic antioxidants, and alkyl phosphate flame retardants, respectively.

[0085] The outer layer preparation process of the above embodiments 1-5 is an existing one, which involves hot melting the raw materials except for the coating layer, then extruding, calendering, trimming the edges, bonding with polyester fiber mesh fabric at high temperature, and finally mixing and dissolving the coating layer raw materials before spraying; the inner film can be made of the same material as the outer film.

[0086] Comparative Example 1

[0087] Red clay soft composite membrane purchased from the market.

[0088] The tensile strength of the membrane materials of Examples 1-5 and Comparative Example 1 were tested respectively, and the results are shown in the table below.

[0089] test Tensile strength / MPa Example 1 1.32 Example 2 1.29 Example 3 1.30 Example 4 1.45 Example 5 1.23 Comparative Example 1 1.03

[0090] As can be seen from the data above, the outer layer of this invention has better tensile strength than commercially available red mud soft composite membranes.

[0091] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An upflow multi-stage IC anaerobic tower, comprising a tower body (1), and a tower top (2) with a planar mounting area on the tower body (1), characterized in that, Also includes: A biogas chamber (3) is located on the planar installation area of ​​the tower top (2) and is connected to an exhaust pipe (23) located on the tower top (2); the biogas chamber (3) also includes: Outer layer (31); The inner layer (32) is disposed within the outer layer (31); The outer layer (31), the inner layer (32), and the top of the tower (2) form a pressure regulating zone (33), and the inner layer (32) and the top of the tower (2) form a gas storage zone (34). The pressure regulating zone (33) and the gas storage zone (34) are mutually enclosed; The biogas chamber (3) is provided with an air inlet pipe (24) at the position corresponding to the top of the tower (2); The biogas chamber (3) is hemispherical; The top of the tower (2) is an umbrella-shaped structure that is high in the middle and low around the edges; The biogas chamber (3) is located in the central area of ​​the tower top (2), and the longitudinal centerlines of the tower body (1), the tower top (2), and the biogas chamber (3) coincide. The outer layer (31) comprises the following raw materials in parts by weight: 80-95 parts polyester fiber, 10-15 parts polyvinyl chloride, 4-8 parts epoxy resin, 32-55 parts plasticizer, 0.5-1 part ultraviolet absorber, 0.5-1.5 parts antioxidant, and 3-6 parts flame retardant. The outer layer (31) also includes an outer coating layer (321). The coating layer (321) is made of the following raw materials in parts by weight: 25-40 parts of polyvinylidene fluoride, 8-20 parts of polyimide, 1-3 parts of propylene glycol block polyether, and 4-6 parts of titanium dioxide; The outer layer (31) is prepared as follows: The raw materials, except for the coating layer (321), are melted, extruded, calendered, trimmed, and then bonded to the polyester fiber mesh fabric at high temperature. Finally, the raw materials of the coating layer (321) are mixed and dissolved, and then sprayed.

2. The upflow multi-stage IC anaerobic tower according to claim 1, characterized in that, The diameter of the biogas chamber (3) is 0.3-0.7 times the diameter of the tower body (1).

3. The upflow multi-stage IC anaerobic tower according to claim 2, characterized in that, The biogas chamber (3) also includes a first pressure sensor (37), which is located on the inner wall of the outer layer (31).

4. The upflow multi-stage IC anaerobic tower according to claim 3, characterized in that, The biogas chamber (3) also includes a second pressure sensor (38), which is located on the inner wall of the inner layer (32).

5. The upflow multi-stage IC anaerobic tower according to claim 4, characterized in that, The outer layer (31) also contains carbon fiber, which is 8-15% of the weight of the polyester fiber used.

6. An upflow multi-stage IC anaerobic tower according to any one of claims 1-5, characterized in that, The plasticizer is at least one of diisobutyl phthalate, dioctyl phthalate, and polyethylene terephthalate.

7. The upflow multi-stage IC anaerobic tower according to claim 6, characterized in that, The coating layer (321) is 0.2-0.4 times the thickness of the outer layer (31).

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