Large-scale integrated biological sewage treatment metal equipment

Abstract

The present application belongs to the technical field of sewage treatment, and particularly relates to a large integrated sewage biological treatment metal equipment, which comprises an inlet and outlet pipe, sewage, activated sludge, an aeration oxygen supply device and a metal shell, thereby forming a pool-shaped sewage biological treatment system, the metal shell around the pool-shaped sewage biological treatment system is composed of a hollow double-layer metal formed by two layers of metal plates and a core pipe in the middle, forming an elliptical, rectangular and circular pool body, the hollow double-layer metal is formed by core pipe welding, including hot air brazing, the hollow double-layer metal is used for heat preservation of the activated sludge and reinforcement of the pool body, air channels and flow channels are formed between the inside and outside gaps of the core pipe, the air channels and flow channels are used for adding rock wool, the present application has heat preservation measures, can increase sludge activity, improve sludge concentration, and improve ammonia nitrogen and total nitrogen removal rate; and adopts a spliced core plate technology to form a permanent rectangular sewage treatment biological pool.

Description

Technical Field

[0001] This invention belongs to the technical field of wastewater treatment, specifically relating to large-scale integrated wastewater biological treatment metal equipment. Background Technology

[0002] Currently, most wastewater treatment plants are constructed with concrete, which traditionally boasts a long lifespan (over 50 years). However, its insulation is poor, construction cycles are long, and the issue of low carbon content remains unresolved. Stainless steel and carbon steel shells are now being used as primary materials. Weathering steel and aluminum alloy materials have significantly improved construction, but leak prevention (using rubber welds) and insulation issues remain, resulting in lower ammonia nitrogen removal rates. Aesthetically pleasing designs are also emerging in the market, but both aesthetics and strength are not guaranteed.

[0003] The developed shell material is integrally molded and effectively combined with the company's process and equipment patent technology. The prefabricated structure reduces the floor space required. With the addition of insulation measures, the sludge activity is increased, the sludge concentration is improved, and the removal rate of ammonia nitrogen and total nitrogen is increased. The metal skeleton used in the assembled core plate technology has strong compressive strength, and test data shows that its lifespan can reach 1,000 years. Summary of the Invention

[0004] The purpose of this invention is to provide a large-scale integrated wastewater biological treatment metal equipment to solve the problems mentioned in the background art.

[0005] The innovation of this invention lies in the fact that the shell material developed by this invention is an assembled structure, which is effectively combined with the company's existing process and equipment patent technology to reduce the floor space; with the addition of heat preservation measures, the sludge activity temperature is increased, the sludge concentration is increased, and the removal rate of ammonia nitrogen and total nitrogen is improved; and by adopting the modular core plate technology, a permanent rectangular sewage treatment biological tank is formed, and test data shows that the lifespan can reach 1000 years.

[0006] To achieve the above-mentioned objectives, the technical solution of this invention is: a large-scale integrated wastewater biological treatment metal equipment, comprising inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a metal shell, thereby forming a pool-shaped wastewater biological treatment system. The metal shell surrounding the pool-shaped wastewater biological treatment system is composed of hollow double-layer metal consisting of two layers of metal plates and a core tube in the middle, forming an elliptical, rectangular, or circular pool. The hollow double-layer metal is formed by welding the core tube, including hot air brazing. The hollow double-layer metal is used for heat preservation of activated sludge and reinforcement of the pool.

[0007] Furthermore, the air channels / flow channels formed between the internal and external gaps of the core tube can be filled with hot oil, hot steam, hot water, sponge-like insulation cotton, rock wool, perlite, etc., with rock wool being preferred.

[0008] Furthermore, the air passage / flow channel formed inside the core tube is connected to the metal plate at both ends to form an inlet and an outlet (unfolded).

[0009] Furthermore, the sludge includes domestic sewage, industrial park sewage, industrial plant sewage, and a mixture of industrial park sewage and domestic sewage, and is particularly suitable for treating domestic sewage.

[0010] Furthermore, the activated sludge can be an oxidation ditch, SBR, AAO, AO, AOO, AOA, inverted A2O, MBR, MBBR, etc., with activated sludge combining oxidation ditch and MBR being the most preferred.

[0011] Furthermore, the aforementioned aeration and oxygen supply device includes various aeration devices such as aeration heads, perforated aeration pipes, aeration hoses, aeration rigid pipes, fixed rubber aeration pipes, jet aeration, lifting aeration, pure oxygen supply, and surface aeration, with rubber aeration pipes being the most preferred.

[0012] Furthermore, the metal casing may be made of materials such as aluminum alloy, stainless steel, weathering steel, carbon steel, copper, or composites thereof, with stainless steel being preferred.

[0013] Furthermore, the metal plates are freely combined from 2m×12m hollow plates to form various types of metal frames and pools of different sizes. The hollow thickness is 2-70cm. Rectangular pools are preferably 12m×36m×6m with a hollow thickness of 15cm, and circular pools are preferably Φ(20-30m)×6m.

[0014] Furthermore, the hollow sheet material has a wall thickness ranging from 1.5 to 10 mm, with 3.5 mm on the inner side and 1.5 mm on the outer side being particularly preferred.

[0015] Furthermore, the hollow sheet material is formed by welding core tubes of triangular, rectangular, circular, elliptical, hexagonal honeycomb, etc., with circular reinforcing columns combined with hot air brazing being particularly preferred.

[0016] Furthermore, the hollow sheet material, the base plate, and the frame reinforcing columns and beams are welded or riveted together, with on-site welding being preferred.

[0017] Furthermore, the rectangular / circular metal equipment for biological wastewater treatment has a hollow double-layer metal outer shell for the pool wall and bottom plate, and a solid metal plate for the supporting frame.

[0018] The beneficial effects of this invention are:

[0019] 1. The prefabricated structure in this invention reduces the floor space required;

[0020] 2. Double-layer insulation is adopted to increase sludge activity, improve sludge concentration, and increase the removal rate of ammonia nitrogen and total nitrogen;

[0021] 3. Using modular core panel technology, a permanent rectangular biological wastewater treatment tank is formed. Test data shows that the lifespan can reach 1000 years. It features fast installation, heat preservation, prevention of activated sludge activity reduction, reasonable price, low cost, fast treatment speed, and long service life. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional diagram of the first layout of the rectangular pool body of the present invention;

[0024] Figure 2 This is a schematic diagram of the first layout of the rectangular pool body of the present invention;

[0025] Figure 3 This is a schematic diagram of a second layout of the rectangular pool body of the present invention;

[0026] Figure 4 This is a schematic diagram of a third layout of the rectangular pool body of the present invention;

[0027] Figure 5 This is a schematic diagram of a fourth layout of the rectangular pool body of the present invention;

[0028] Figure 6 This is a schematic diagram of the first layout of the circular pool body of the present invention;

[0029] Figure 7 This is a schematic diagram of a second layout of the circular pool body of the present invention;

[0030] Figure 8 This is a schematic diagram of a third layout of the circular pool body of the present invention;

[0031] Figure 9 This is a schematic diagram of the first layout of the elliptical pool body of the present invention;

[0032] Figure 10 This is a schematic diagram of a second layout of the elliptical pool body according to the present invention;

[0033] Figure 11 This is a schematic diagram of a third layout of the elliptical pool body of the present invention;

[0034] Figure 12 This is a schematic diagram of the rectangular core tube structure of the present invention;

[0035] Figure 13This is a schematic diagram of the honeycomb core tube structure of the present invention;

[0036] Figure 14 This is a schematic diagram of the triangular core tube structure of the present invention;

[0037] Figure 15 This is a schematic diagram of the elliptical core tube structure of the present invention;

[0038] Figure 16 This is a schematic diagram of the circular core tube structure of the present invention;

[0039] Figure 17 This is a schematic diagram of the internal structure of the metal casing of the present invention;

[0040] Figure 18 This is a three-dimensional diagram of a second layout of the rectangular pool body according to the present invention;

[0041] Figure 19 This is a three-dimensional diagram of a third layout of the rectangular pool body of the present invention;

[0042] Figure 20 This is a three-dimensional diagram of the fourth layout of the rectangular pool body of the present invention;

[0043] Figure 21 This is a three-dimensional diagram of the first layout of the elliptical pool body according to the present invention;

[0044] Figure 22 This is a three-dimensional diagram of a second layout of the elliptical pool body according to the present invention;

[0045] Figure 23 This is a three-dimensional diagram of the third layout of the elliptical pool body of the present invention;

[0046] Figure 24 This is a three-dimensional view of the first layout of the circular pool body of the present invention;

[0047] Figure 25 This is a three-dimensional view of a second layout of the circular pool body according to the present invention;

[0048] Figure 26 This is a three-dimensional diagram of a third layout of the circular pool body according to the present invention;

[0049] Figure 27 This is a three-dimensional layout diagram of the square pool body of the present invention;

[0050] In the diagram: 1. Metal plate; 2. Core tube; 3. MBR flat sheet membrane device; 4. Separator; 5. Insulation filler. Detailed Implementation

[0051] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0052] Please see Figure 1-27 The present invention provides a technical solution: a large-scale integrated wastewater biological treatment metal equipment, including inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a metal shell, thereby forming a pool-shaped wastewater biological treatment system. The metal shell of the pool-shaped wastewater biological treatment system is composed of hollow double-layer metal consisting of two layers of metal plates 1 and a core tube 2 in the middle, forming an elliptical, rectangular, and circular pool body. The hollow double-layer metal is welded into shape by the core tube 2, including hot air brazing. The hollow double-layer metal is used for heat preservation of activated sludge and reinforcement of the pool body.

[0053] Air channels and flow channels are formed between the internal and external gaps of the core tube 2. The air channels and flow channels are used to add rock wool. The beginning and end of the air channels and flow channels are connected to the metal plate 1 to form the inlet and outlet.

[0054] The activated sludge is formed by combining oxidation ditch and MBR. The aeration and oxygen supply device includes fixed rubber aeration pipes. The metal shell is made of stainless steel. Metal plate 1 is a combination of 2m*12m hollow plates to form a hollow double-layer metal, and the tank body is formed by the hollow double-layer metal.

[0055] The thickness of the hollow double-layer metal is 2-70cm. The rectangular pool is 12m*36m*6m, and the thickness of the hollow double-layer metal in the rectangular pool is 15cm. The diameter of the circular pool is 20-30m*6m. The inner side of the hollow plate is 3.5mm and the outer side is 1.5mm.

[0056] Hollow core panels are assembled by welding together a base plate and frame reinforcing columns, and the welding is done on-site.

[0057] The pool-shaped biological wastewater treatment system has hollow double-layered metal walls and bottom plates surrounding its metal shell.

[0058] The forming process of the metal casing includes:

[0059] Step S1: Prepare several metal plates 1 and the core tube 2 in the middle before welding;

[0060] Step S2: The core tube 2 is welded between two metal plates 1 by hot air brazing to form a metal shell;

[0061] Step S3: Weld four sets of metal shells to form the pool body.

[0062] Step S2 includes:

[0063] Step S2.1: The core tube 2 has the shapes of triangle, circle, ellipse, rectangle and honeycomb, thus forming different types of metal shells;

[0064] Step S2.2: Thermal insulation material 5 is filled between the metal plate 1 and the core tube 2. The thermal insulation material 5 between the core tubes is made of rock wool. The array of core tubes 2 inside the metal shell is formed by copper brazing at 1078℃. Hot air is used as the medium, rather than traditional heat radiation. The array of core tubes 2 has gaps, allowing hot air to be blown in at extremely high speed.

[0065] The metal plate 1 is heated very evenly. Because of the even heating, huge plates can be welded and made as flat as a mirror, and no stress deformation will occur permanently.

[0066] The aeration and oxygen supply device adopts intermittent aeration. The aeration frequency and aeration volume are automatically adjusted according to the oxygen content of the sewage. The oxygen content of the sewage changes constantly and is affected by the environmental climate. The environmental climate is transmitted through the Internet. By measuring the oxygen content of the sewage and the rate of oxygen loss caused by the climate, the aeration frequency and aeration volume can be precisely controlled.

[0067] Example 1 (e.g.) Figure 2 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a rectangular metal shell, forming a pool-shaped wastewater biological treatment system. The pool-shaped wastewater biological treatment system is surrounded by a hollow double-layer metal shell composed of two layers of metal plates 1 and a core tube 2 in the middle. The core tube 2 of the hollow double-layer metal plates 1 has a honeycomb cross-section. Hot steam is introduced into the air passages formed between the internal and external gaps of the core tube 2. The ends of the air passages are connected to the metal plates 1 to form the inlet and outlet.

[0068] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and MBR. A baffle 4 is provided along the length of the metal shell. There is a gap between the baffle 4 and both ends of the metal shell, which divides the metal shell into two chambers. The water in the two chambers is connected to form an oxidation ditch circulation channel. An MBR flat sheet membrane device 3 is provided on at least one side of the baffle 4. An outlet pipe is provided on the MBR flat sheet membrane device 3.

[0069] Example 2 (e.g.) Figure 3): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a rectangular metal shell, forming a pool-shaped wastewater biological treatment system. The pool-shaped wastewater biological treatment system is surrounded by a hollow double-layer metal shell composed of two layers of metal plates 1 and a core tube 2 in the middle. The core tube 2 of the hollow double-layer metal plate 1 has a rectangular cross-section. Hot water is added to the air passages formed between the internal and external gaps of the core tube 2. The ends of the air passages are connected to the metal plates 1 to form the inlet and outlet.

[0070] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and AO. The process is based on the traditional AO process and combines a special flow pattern to develop a new and efficient biological nitrogen and phosphorus removal process that combines the advantages of oxidation ditch process. It adopts a closed baffle 4 that matches the rectangular metal equipment shell. There is a gap between the closed baffle 4 and the rectangular metal equipment around the perimeter, which divides the metal shell into two chambers and the water in the two chambers is connected to form an oxidation ditch circulation channel. An MBR flat plate membrane device 3 is installed inside the closed baffle 4, and an outlet pipe is installed on the MBR flat plate membrane device 3.

[0071] Example 3 (e.g.) Figure 4 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a circular metal shell, forming a pool-shaped wastewater biological treatment system. The pool-shaped wastewater biological treatment system is surrounded by a hollow double-layer metal shell composed of two layers of metal plates 1 and a core tube 2 in the middle. The core tube 2 of the hollow double-layer metal plate 1 has a circular cross-section. Hot oil is added to the air passages formed between the internal and external gaps of the core tube 2. The beginning and end of the air passages are connected to the metal plate 1 to form the inlet and outlet.

[0072] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and MBR, integrating anoxic zone, aerobic zone and membrane filtration zone into one unit. The MBR flat sheet membrane is placed in the center of the circular metal equipment, dividing the metal shell into two chambers with the water flowing from the beginning to the end of the two chambers connected to form an oxidation ditch circulation channel. The MBR flat sheet membrane device 3 is equipped with an outlet pipe.

[0073] Example 4 (e.g.) Figure 5 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a circular metal shell, forming a pool-shaped wastewater biological treatment system. The pool-shaped wastewater biological treatment system is surrounded by a hollow double-layer metal shell composed of two layers of metal plates 1 and a core tube 2 in the middle. The core tube 2 of the hollow double-layer metal plate 1 has a circular cross-section. Hot oil is added to the air passages formed between the internal and external gaps of the core tube 2. The beginning and end of the air passages are connected to the metal plate 1 to form the inlet and outlet.

[0074] This biological treatment system is used to treat domestic sewage. It employs a process combining oxidation ditch and MBR (Membrane Bioreactor) technology, integrating anoxic, aerobic, and membrane filtration zones into one unit. The MBR flat-sheet membrane is placed on the right side of the circular metal equipment, dividing the metal casing into two chambers with interconnected end-to-end water flow, forming a circulating channel in the oxidation ditch. The MBR flat-sheet membrane unit 3 is equipped with an effluent pipe.

[0075] Example 5 (e.g.) Figure 6 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a circular metal shell, forming a pool-shaped wastewater biological treatment system. The shell surrounding the pool-shaped wastewater biological treatment system is a hollow double-layer metal structure composed of two metal plates 1 and a core tube 2 in the middle. The core tube 2 of the hollow double-layer metal plate 1 has a honeycomb cross-section. Hot steam is introduced into the air passages formed between the internal and external gaps of the core tube 2. The ends of the air passages are connected to the metal plate 1 to form the inlet and outlet.

[0076] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and MBR. An annular baffle 4 is provided inside the circular metal shell. The inner diameter of the annular baffle 4 is smaller than the outer diameter of the metal shell and forms an annular gap, which divides the metal shell into two chambers. The water in the two chambers is connected to form an oxidation ditch circulation channel. An MBR flat sheet membrane device 3 is provided on the outside of the annular baffle 4. An outlet pipe is provided on the MBR flat sheet membrane device 3.

[0077] Example 6 (e.g.) Figure 7 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a circular metal shell, forming a pool-shaped wastewater biological treatment system. The shell surrounding the pool-shaped wastewater biological treatment system is a hollow double-layer metal structure composed of two metal plates 1 and a core tube 2 in the middle. The core tube 2 of the hollow double-layer metal plate 1 has a rectangular cross-section. Hot water is added to the air passages 7 formed between the internal and external gaps of the core tube 2. The ends of the air passages are connected to the metal plates 1 to form the inlet and outlet.

[0078] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and AO. The process is based on the traditional AO process and combines a special flow pattern to develop a new and efficient biological nitrogen and phosphorus removal process that combines the advantages of oxidation ditch process. It adopts a closed baffle 4 that matches the shell of the circular metal equipment. There is a gap between the closed baffle 4 and the circular metal equipment, which divides the metal shell into two chambers and the water in the two chambers is connected to form an oxidation ditch circulation channel. The closed baffle 4 is equipped with an MBR flat sheet membrane device 3, and the MBR flat sheet membrane device 3 is equipped with an outlet pipe.

[0079] Example 7 (e.g.) Figure 8): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a circular metal shell, forming a pool-shaped wastewater biological treatment system. The shell surrounding the pool-shaped wastewater biological treatment system is a hollow double-layer metal structure composed of two metal plates 1 and a core tube 2 in the middle. The core tube 2 of the hollow double-layer metal plate 1 has a circular cross-section. Hot oil is added to the air passages formed between the internal and external gaps of the core tube 2. The beginning and end of the air passages are connected to the metal plate 1 to form the inlet and outlet.

[0080] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and MBR, integrating anoxic zone, aerobic zone and membrane filtration zone into one unit. The MBR flat sheet membrane is placed in the center of the circular metal equipment, dividing the metal shell into two chambers and connecting the head and tail water of the two chambers to form an oxidation ditch circulation channel. The MBR flat sheet membrane device 3 is equipped with an outlet pipe.

[0081] Example 8 (e.g.) Figure 9 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and an elliptical metal shell, forming a pool-shaped wastewater biological treatment system. The shell surrounding the pool-shaped wastewater biological treatment system is a hollow double-layer metal structure composed of two metal plates 1 and a core tube 2 in the middle, and the hollow double-layer metal on the left and right sides is elliptical. The core tube 2 of the hollow double-layer metal plate 1 has a honeycomb cross-section. Hot steam is introduced into the air passages formed between the gaps inside and outside the core tube 2, and the ends of the air passages are connected to the metal plate 1 to form the inlet and outlet.

[0082] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and MBR. A baffle 4 is provided along the length of the metal shell. There is a gap between the baffle 4 and both ends of the metal shell, which divides the metal shell into two chambers. The water in the two chambers is connected to form an oxidation ditch circulation channel. An MBR flat sheet membrane device 3 is provided on at least one side of the baffle 4. An outlet pipe is provided on the MBR flat sheet membrane device 3.

[0083] Example 9 (e.g.) Figure 10 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and an elliptical metal shell, forming a pool-shaped wastewater biological treatment system. The shell surrounding the pool-shaped wastewater biological treatment system is a hollow double-layer metal structure composed of two metal plates 1 and a core tube 2 in the middle, and the hollow double-layer metal on the left and right sides is elliptical. The core tube 2 of the hollow double-layer metal plate 1 has a rectangular cross-section. Hot water is added to the air passages formed between the gaps inside and outside the core tube 2, and the ends of the air passages are connected to the metal plate 1 to form the inlet and outlet.

[0084] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and AO. The process is based on the traditional AO process and combines a special flow pattern to develop a new and efficient biological nitrogen and phosphorus removal process that combines the advantages of oxidation ditch process. It adopts a closed baffle 4 that matches the elliptical metal equipment shell. There is a gap between the closed baffle 4 and the elliptical metal equipment around the perimeter, which divides the metal shell into two chambers and the water in the two chambers is connected to form an oxidation ditch circulation channel. An MBR flat sheet membrane device 3 is installed inside the closed baffle 4, and an outlet pipe is installed on the MBR flat sheet membrane device 3.

[0085] Example 10 (as shown) Figure 11 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and an elliptical metal shell, forming a pool-shaped wastewater biological treatment system. The shell surrounding the pool-shaped wastewater biological treatment system is a hollow double-layer metal structure composed of two metal plates 1 and a core tube 2 in the middle, and the hollow double-layer metal on the left and right sides is elliptical. The core tube 2 of the hollow double-layer metal plate 1 has a circular cross-section. Hot oil is added to the air passages formed between the gaps inside and outside the core tube 2, and the ends of the air passages are connected to the metal plate 1 to form the inlet and outlet.

[0086] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and MBR, integrating anoxic zone, aerobic zone and membrane filtration zone into one unit. The MBR flat sheet membrane is placed in the center of the elliptical metal equipment, which divides the metal shell into two chambers and connects the water at the beginning and end of the two chambers to form an oxidation ditch circulation channel. The MBR flat sheet membrane device 3 is equipped with an outlet pipe.

[0087] Example 11 (as shown) Figure 27 ): Large-scale integrated wastewater biological treatment metal equipment, consisting of inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply device, and a square metal shell, forming a pool-shaped wastewater biological treatment system. The pool-shaped wastewater biological treatment system is surrounded by a hollow double-layer metal shell composed of two layers of metal plates 1 and a core tube 2 in the middle. The cross-section of the core tube 2 of the hollow double-layer metal plates 1 can be triangular, rectangular, circular, elliptical, hexagonal honeycomb, etc. Hot water is added to the air passages formed between the gaps inside and outside the core tube 2, and the ends of the air passages are connected to the metal plates 1 to form the inlet and outlet.

[0088] This biological treatment system is used to treat domestic sewage. It adopts a process that combines oxidation ditch and AO. The process is based on the traditional AO process and combines a special flow pattern to develop a new and efficient biological nitrogen and phosphorus removal process that combines the advantages of oxidation ditch process. It adopts a closed baffle 4 that matches the square metal equipment shell. There is a gap between the closed baffle 4 and the square metal equipment around the perimeter, which divides the metal shell into two chambers and the water in the two chambers is connected to form an oxidation ditch circulation channel. An MBR flat sheet membrane device 3 is installed inside the closed baffle 4, and an outlet pipe is installed on the MBR flat sheet membrane device 3.

[0089] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-scale integrated wastewater biological treatment metal equipment, comprising inlet and outlet pipes, wastewater, activated sludge, aeration and oxygen supply devices, and a metal shell, thereby forming a pool-like wastewater biological treatment system, characterized in that: The metal shell of the pool-shaped biological wastewater treatment system is composed of a hollow double-layer metal consisting of two layers of metal plates (1) and a core tube (2) in the middle, forming an elliptical, rectangular, or circular pool body. The hollow double-layer metal is formed by hot air brazing of the core tube (2). The hollow double-layer metal is used for heat preservation of activated sludge and reinforcement of the pool body. The forming process of the metal shell includes: Step S1: Prepare several metal plates (1) and the core tube (2) in the middle before welding. Step S2: The core tube (2) is welded between two metal plates (1) by hot air brazing to form a metal shell; Step S3: Four sets of metal shells are welded to form a pool body; Step S2 includes: Step S2.1: The core tube (2) has the shapes of triangle, circle, ellipse, rectangle and honeycomb, thus forming different types of metal shells; Step S2.2: The space between the metal plate (1) and the core tube (2) is filled with thermal insulation material (5). The core tube (2) array inside the metal shell is made by copper brazing at 1078℃. Hot air is used as the medium. The core tube (2) array has gaps, and hot air is blown in at extremely high speed. Air passages and flow channels are formed between the internal and external gaps of the core tube (2). The air passages and flow channels are used to add rock wool, sponge-like insulation cotton, or perlite. The beginning and end of the air passages and flow channels are connected to the metal plate (1) to form an inlet and an outlet. During the treatment of domestic sewage, hot steam, hot water or hot oil are introduced into the air passage formed between the internal and external gaps of the core tube (2).

2. The large-scale integrated biological wastewater treatment metal equipment according to claim 1, characterized in that: The activated sludge is formed by combining an oxidation ditch and an MBR. The aeration and oxygen supply device includes a fixed rubber aeration pipe. The metal shell is made of stainless steel. The metal plate (1) is... The hollow sheet material is combined to form a hollow double-layer metal, and the pool body is formed through the hollow double-layer metal.

3. The large-scale integrated biological wastewater treatment metal equipment according to claim 2, characterized in that: The thickness of the hollow double-layer metal is 2~70cm, and the inner side of the hollow plate is 3.5mm and the outer side is 1.5mm.

4. The large-scale integrated biological wastewater treatment metal equipment according to claim 2, characterized in that: The rectangular pool is The hollow double-layered metal of the rectangular pool is 15cm thick.

5. The large-scale integrated wastewater biological treatment metal equipment according to claim 3, characterized in that: The hollow sheet material is assembled by welding together a base plate and frame reinforcing columns, and the welding is done on-site.

6. The large-scale integrated wastewater biological treatment metal equipment according to claim 5, characterized in that: The pool-shaped biological wastewater treatment system has a hollow double-layered metal shell with walls and bottom plate.

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