Method for preparing sewage treatment device and material by utilizing aluminum ash and product thereof

Abstract

The invention relates to the technical field of waste resource utilization, in particular to a method for preparing a sewage treatment device and material by utilizing aluminum ash and a product thereof. The assembly type sewage treatment device comprises a flocculation basin, a first sedimentation basin, a second sedimentation basin and a feeding device, the flocculation basin, the first sedimentation basin and the second sedimentation basin are sequentially arranged and connected, and sewage to be treated sequentially passes through the flocculation basin, the first sedimentation basin and the second sedimentation basin so as to finish flocculation and sedimentation treatment; each of the flocculation basin, the first sedimentation basin and the second sedimentation basin comprises a steel reinforcement framework and an aluminum-containing ash concrete layer; the feeding device is communicated with the flocculation basin through a pipeline, and a sewage treatment material containing aluminum ash stored in the feeding device enters the flocculation basin from the top of the flocculation basin through a pipeline to be mixed with sewage to be treated and flocculate. The continuous sewage treatment process is realized, and the sewage treatment efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste resource utilization, and in particular to a method for preparing sewage treatment equipment and materials by utilizing aluminum ash, and products thereof. Background Art

[0002] As the world's largest producer and consumer of aluminum, my country produces about 2 million tons of aluminum ash each year, and has listed aluminum ash as hazardous waste in the National List of Hazardous Wastes (2021). Aluminum ash is a by-product of aluminum electrolytic smelting, aluminum alloy recycling, and the production and processing of aluminum products. Its main components are elemental aluminum, aluminum oxide, and other oxides.

[0003] River sewage treatment is an important area in water treatment. In recent years, due to rapid industrial development, the environment has been seriously polluted. Many water bodies in my country are seriously polluted, especially lakes and rivers. The water is turbid, nitrogen and phosphorus elements exceed the standard, and the concentration of organic matter is high. These problems have brought many inconveniences to people's lives. At the same time, most of the existing sewage treatment methods use the partition flocculation sedimentation method. On the one hand, this method increases costs and manpower input. On the other hand, the pollutants formed by flocculation settle to the bottom of the river by gravity and mix with the riverbed sludge, which brings cost and technical problems to the subsequent secondary treatment process. Therefore, people are looking for a solution that can both treat sewage and separate pollutants from sludge.

[0004] Flocculation is the process of agglomerating pollutants in water to form aggregates, thereby achieving the sedimentation of pollutants. The effects of flocculation and sedimentation are mainly affected by the type of flocculant and the flocculation hydraulic conditions. Based on this, the optimization of flocculant materials and hydraulic conditions has been widely studied.

[0005] Concrete is a widely used civil engineering material today. 3D printing concrete technology is to print concrete slurry through a 3D printing device according to a pre-designed running path, and finally obtain the designed concrete components. This construction method is not limited by the templates and construction processes required by traditional construction methods, and can achieve the construction of more complex concrete structures. Summary of the invention

[0006] The object of the present invention is to provide a method for preparing sewage treatment equipment and materials using aluminum ash and its products, so as to solve at least one technical problem existing in the prior art.

[0007] In order to solve the above technical problems, the present invention provides an assembled sewage treatment device, comprising a flocculation tank, a first sedimentation tank, a second sedimentation tank and a feeding device; The flocculation tank, the first sedimentation tank and the second sedimentation tank are arranged and connected in sequence, and the sewage to be treated passes through the flocculation tank, the first sedimentation tank and the second sedimentation tank in sequence to complete flocculation and sedimentation treatment; The flocculation tank, the first sedimentation tank and the second sedimentation tank all include a steel skeleton and a aluminum ash-containing concrete layer; The feeding device is connected to the flocculation tank through a pipeline, and the sewage treatment liquid stored in the feeding device enters the flocculation tank from the top of the flocculation tank through the pipeline to mix with the sewage to be treated and flocculate; The sewage treatment liquid is obtained by dissolving sewage treatment materials containing aluminum ash in water.

[0008] Furthermore, the flocculation tank comprises a flocculation water inlet, a flocculation water outlet, a flow disturbance component and a flocculation flow channel; The flocculation water inlet and the flocculation water outlet are arranged on both sides of the flocculation tank, and are used for the inlet and outlet of sewage respectively; The flocculation flow channel is arranged in the flocculation tank, and is used to guide the flow of sewage and cause disturbance when the sewage flows, thereby improving the flocculation efficiency; The flow-disturbing member is arranged between the flocculation channels, and is used to generate vortices during the flow of sewage, thereby increasing turbulent kinetic energy and turbulent kinetic energy dissipation rate and thus improving the flocculation effect.

[0009] Further, the flocculation flow channel includes a water inlet flow channel and a staggered flow channel; The water inlet flow channel includes a first horizontal section, a first arc section, a first vertical section, a second arc section and a third arc section; The first horizontal section is connected to the wall above the water inlet of the flocculation tank; One end of the first horizontal section away from the wall above the water inlet of the flocculation tank is connected to the first arc section; The first arc segment and the second arc segment are connected via the first vertical segment; The first arc segment, the first vertical segment and the second arc segment together form a U-shaped structure, and the opening direction of the U-shaped structure is opposite to the water inlet direction of the flocculation tank; The third arc segment is arranged at an end of the second arc segment away from the first vertical segment and tends to be away from the side wall of the flocculation water inlet; The staggered flow channels are provided in plurality in the flocculation tank; The ends of the staggered flow channels are staggeredly connected to the top wall or the bottom wall of the flocculation tank through vertical flow channels, that is, after a staggered flow channel is connected to the top wall, its adjacent staggered flow channel is connected to the bottom wall; The staggered flow channels are of S-shaped wave structures, and the S-shaped wave structures of two adjacent staggered flow channels are arranged in a non-parallel manner, that is, there are cavities formed by being far away from each other and narrow passages formed by being close to each other between the two adjacent staggered flow channels; The spoiler member is disposed in the cavity.

[0010] Further, the first sedimentation tank comprises a first sedimentation water inlet, a first sedimentation water outlet and a first sedimentation flow channel; The first sedimentation water inlet and the first sedimentation water outlet are arranged on both sides of the first sedimentation tank, and are used for the inlet and outlet of sewage respectively; The first sedimentation water inlet and the flocculation water outlet are arranged opposite to each other; The first sedimentation flow channel is arranged in the first sedimentation tank, and is used to reduce the vortex in the fluid, increase the stroke of the fluid, and precipitate large particles of impurities in the fluid.

[0011] Furthermore, the first sedimentation channel includes a receiving channel, a T-shaped channel and an L-shaped channel; One end of the receiving flow channel is arranged on the side wall at the lower end of the first sedimentation water inlet, and the other end is a free end, which is used to receive the fluid flowing out of the flocculation tank; The T-shaped flow channel includes a second vertical section, a second horizontal section and a first convex head section; The upper end of the second vertical section is connected to the top wall of the first sedimentation tank, and the other end is connected to the second horizontal section; The connection between the second vertical section and the second horizontal section is an arc-shaped chamfered structure; The distance between the receiving flow channel and the second horizontal section is the same as the distance between the second horizontal section and the bottom wall of the first sedimentation tank; The first convex head section is located at an end of the second horizontal section away from the first sedimentation water inlet; The height of the first convex head section is higher than the height of the second horizontal section; The lower end surface of the first convex head section and the lower end surface of the second horizontal section are on the same horizontal plane; An arc-shaped chamfered structure is formed between the upper end surface of the first convex head section and the upper end surface of the second horizontal section; The L-shaped flow channel includes a third vertical segment, a third horizontal segment, a fourth arc segment and a fourth horizontal segment; The lower end of the third vertical section is connected to the bottom wall of the first sedimentation tank; The third horizontal section is connected to the side of the third vertical section; The fourth arc segment is connected to one end of the third horizontal segment away from the third vertical segment, and the other end of the fourth arc segment is connected to the fourth horizontal segment.

[0012] Further, the second sedimentation tank comprises a second sedimentation water inlet, a second sedimentation water outlet and a second sedimentation flow channel; The second sedimentation water inlet and the second sedimentation water outlet are arranged on both sides of the second sedimentation tank, and are used for the inlet and outlet of sewage respectively; The second sedimentation water inlet and the first sedimentation water outlet are arranged opposite to each other; The second sedimentation flow channel is arranged in the second sedimentation tank and is used for sedimenting particulate impurities in the fluid.

[0013] Further, the second sedimentation channel includes a lower layer channel and an upper layer channel; The lower flow channel includes a fifth horizontal section, a fifth arc section, and a second convex head section; One end of the fifth horizontal section is arranged on the side wall above the second sedimentation water inlet, and the other end is connected to the fifth arc section; One end of the fifth arc segment away from the fifth horizontal segment is connected to the second convex head segment; The height of the second convex head segment is the height of the fifth arc segment; The lower end surface of the second convex head segment and the lower end of the connection point of the fifth arc segment are on the same horizontal plane; The upper flow channel includes a fourth vertical segment, a sixth horizontal segment, a sixth arc segment and a sixth horizontal segment; The lower end of the fourth vertical section is connected to the bottom wall of the second sedimentation tank, and the height of the fourth vertical section in the vertical direction is higher than that of the lower flow channel; The sixth horizontal segment is connected to a side portion of the fourth vertical segment; The sixth arc segment is connected to a side of the sixth horizontal segment away from the fourth vertical segment; The other side of the sixth arc segment is connected to the sixth horizontal segment.

[0014] Furthermore, it also includes a sewage detection device, a lifting ring and a connecting member; The sewage detection device is arranged on the upper side wall of the first sedimentation outlet and on the lower side wall of the second sedimentation outlet, and is used to monitor the pollutant content of the fluid; The hanging ring is provided in plurality on the flocculation tank, the first sedimentation tank and the second sedimentation tank; The upper end of the lifting ring is exposed above the aluminum ash-containing concrete layer, and the lower end of the lifting ring is buried in the aluminum ash-containing concrete layer and tied and connected to the steel bar skeleton; The connecting member comprises a connecting seat and a connecting block; The connecting seat and the connecting block are arranged in pairs at corresponding positions on the tops of two adjacent tank bodies of the flocculation tank, the first sedimentation tank and the second sedimentation tank; The upper parts of the connection seat and the connection block are exposed above the aluminum ash-containing concrete and are connected by fasteners, and the bottoms of the connection seat and the connection block are buried in the aluminum ash-containing concrete layer and welded to the steel frame.

[0015] In a second aspect, the present application also discloses a method for preparing aluminum ash-containing concrete, comprising the steps of: S1: Grind and deoxidize the aluminum ash, place the deoxidized aluminum ash in an alkaline solution, add Ca(OH)2 solution to hydrolyze at 95°C for 3 h, separate the reacted substances into solid and liquid to obtain aluminum ash treatment materials; S2: Add 75-110 parts of Portland cement, 90-120 parts of medium sand, 10-30 parts of fly ash and 0-15 parts of aluminum ash treated material into a cement paste mixer, and mix well to obtain a powdered cement-based material; S3: adding 34.2-41.8 parts of water, 0.585-0.72 parts of water reducing agent, 0.045-0.055 parts of water retaining agent, 0.045-0.055 parts of defoaming agent and 0.045-0.055 parts of latex powder, stirring evenly with a magnetic stirrer to obtain a mixed aqueous solution; S4: slowly add the stirred mixed aqueous solution to the powdered cement-based material to mix and stir evenly to obtain a printing slurry, and slowly add 0.09-0.11 parts of epoxy resin gelling agent to the printing slurry to obtain a 3D printing concrete material.

[0016] Furthermore, in step S3, the water reducing agent is polycarboxylic acid, the water retaining agent is cellulose ether, and the defoaming agent is high carbon alcohol.

[0017] In a third aspect, the present application also discloses a method for preparing a sewage treatment material containing aluminum ash as claimed in the claim, comprising the steps of: X1: Weigh 5-15 parts of aluminum ash, add 20-40 parts of deionized water, mix well, then add 30 parts of 31%-35% hydrochloric acid, seal the beaker; place the beaker in a magnetic stirring water bath, keep the temperature at 60-80℃ for reaction, wait for 2.5-3.5h, and cool to room temperature. Seal the reacted solution and place it in an oven, mature at 50-70℃ for 24-48h, filter, and obtain PAC solution. Place the solution in a constant temperature drying oven, dry at 170-200℃ for 1.5-2.5h, grind, and obtain polyaluminium chloride powder.

[0018] X2: Take 3-10 parts of oyster shell powder and soak them in 100 parts of 0.0625-0.3125 mol / L Cu(NO3)23H2O solution, stir magnetically at room temperature for 5-7 hours, filter, place the filtered material in a constant temperature drying oven, dry it at 60-80 ℃ for 3-5 hours, take it out and wash it with deionized water and anhydrous ethanol 3-5 times, put it in a 400-600 ℃ muffle furnace and calcine it for 1-2 hours, take it out and grind it to obtain copper oxide-loaded oyster shell.

[0019] X3: Weigh 5-15 parts of polyaluminium chloride, 0-1 part of polyacrylamide, and 0-80 parts of oyster shell powder loaded with copper oxide, stir magnetically for 3-5 hours, and let stand for 30 minutes. Put it in a constant temperature drying oven, dry it at 60-80℃ to constant weight, take it out and let it stand to cool to obtain polyaluminium chloride-polyacrylamide-copper oxide-oyster shell composite material (PAC-PAM-CuO-Os).

[0020] 10. The method for preparing sewage treatment materials containing aluminum ash according to claim 9, characterized in that the oyster shell powder has a grinding fineness of 200-2000 mesh and is calcined at 300-400°C for 2-4 h.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects: (1) The sewage treatment device can not only flocculate pollutants in sewage, but also collect the pollutants in the device, thus realizing the separation and collection of pollutants and sludge. At the same time, the device is mainly composed of four parts: flocculation tank 1, first sedimentation tank 2, second sedimentation tank 3 and feeding device 4. By arranging and connecting them in sequence, a continuous sewage treatment process is realized, effectively improving the sewage treatment efficiency.

[0022] (2) The device adopts an assembled structure, and each tank body is connected by a detachable fastener 93. At the same time, a pre-buried lifting ring is provided above each tank body to facilitate on-site assembly and disassembly. This not only reduces the construction difficulty and cost, but also facilitates subsequent maintenance and overhaul work.

[0023] (3) The flocculation tank 1 in the sewage treatment device adopts an arc-shaped flow channel. Compared with the zigzag flow channel, the arc-shaped flow channel has a larger turbulent kinetic energy dissipation rate and turbulent kinetic energy, which means that the fluid has a larger stirring and flow capacity, which can effectively promote the collision and combination of particles, increase the collision opportunities, and improve the flocculation efficiency. At the same time, a prismatic flow disturbance structure is set inside the flocculation tank 1, and a relatively small vortex is generated near the flow disturbance structure, which further increases the turbulent kinetic energy and turbulent kinetic energy dissipation rate inside the flow channel and improves the flocculation effect.

[0024] (4) The feeding device is connected to the flocculation tank through a pipeline, which enables the flexible addition of sewage treatment liquid and facilitates the adjustment of the dosage according to the sewage properties and treatment requirements. The setting of the sewage detection device can monitor the pollutant content of the fluid during the treatment process in real time to ensure that the effluent water quality meets the standards.

[0025] (5) Some arc-shaped flow channels are used inside the sedimentation tank, and vortex structures are added near the flow channels. Although small particles are more likely to resuspend in this flow phenomenon, thereby slowing down sedimentation, large particles can effectively utilize the energy of the vortex and move downward quickly, thereby improving sedimentation efficiency. Combined with sewage treatment materials containing aluminum ash, pollutants are more likely to settle in the device.

[0026] (6) The flocculation tank, the first sedimentation tank and the second sedimentation tank are all constructed with a steel frame and aluminum ash concrete layer, which enhances the stability and durability of the overall structure. This structure is not only corrosion-resistant and anti-penetration, but also effectively resists chemical erosion and physical impact that may occur during sewage treatment.

[0027] (7) Aluminum ash is processed and applied to concrete and sewage treatment materials, which not only realizes the resource utilization of hazardous waste and reduces environmental pollution, but also conforms to the concept of "green and environmental protection" (7) The aluminum ash is processed again to remove the elemental aluminum, aluminum nitride and other impurities, mainly to prevent the impurities from reacting with water vapor in the air to produce gas, thereby reducing the impact on the strength of the concrete. The aluminum ash treated material replaces part of the silicate cement, which can inhibit the early hydration heat release of the concrete and reduce the risk of concrete cracking.

[0028] (8) The concrete material doped with an appropriate amount of aluminum ash has good physical and mechanical properties and printability, and can be applied to the 3D printing construction of various complex structures. At the same time, the preparation process of the concrete material is simple, the operation is convenient, and it is easy to realize industrial production and popularize and apply.

[0029] (9) By converting oyster shells, a common waste, into an efficient sewage treatment material containing aluminum ash, not only can resources be reused, but also waste accumulation and environmental pollution can be reduced, which is in line with the concepts of green chemistry and circular economy. The copper oxide was loaded onto the oyster shell powder by the impregnation method, ensuring the efficient loading of copper oxide on the surface of the oyster shell, thereby improving its bactericidal performance.

[0030] (10) The combined use of polyacrylamide, copper oxide-loaded oyster shells and polyaluminium chloride can not only improve the flocculation effect of sewage treatment materials, but also have a good bactericidal effect, thus realizing the multifunctional role of composite materials in the field of water treatment. At the same time, the preparation and operation process of the composite materials is relatively simple and easy to implement and control in industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a three-dimensional structural schematic diagram of an assembled sewage treatment device; Figure 2 It is a sectional three-dimensional structural diagram of an assembled sewage treatment device; Figure 3 It is a schematic diagram of the three-dimensional structure of the flocculation tank from the first perspective; Figure 4 It is a schematic diagram of the three-dimensional structure of the flocculation tank from the second perspective; Figure 5 It is a plan view of the internal structure of the flocculation tank; Figure 6 It is a schematic diagram of the three-dimensional structure of the steel frame of the flocculation tank from the first perspective; Figure 7 It is a schematic diagram of the three-dimensional structure of the steel frame of the flocculation tank from the second perspective; Figure 8 It is a schematic diagram of the three-dimensional structure of the first sedimentation tank from a first viewing angle; Fig. 9 It is a schematic diagram of the three-dimensional structure of the first sedimentation tank from a second viewing angle; Fig.10 It is a schematic plan view of the internal structure of the first sedimentation tank; Fig.11 It is a schematic diagram of the three-dimensional structure of the steel bar skeleton of the first sedimentation tank; Fig.12 It is a schematic diagram of the three-dimensional structure of the second sedimentation tank from a first viewing angle; Fig.13 is a schematic diagram of the three-dimensional structure of the second sedimentation tank from a second viewing angle; Fig.14 It is a schematic plan view of the internal structure of the second sedimentation tank; Fig.15 It is a schematic diagram of the three-dimensional structure of the steel bar skeleton of the second sedimentation tank; Fig.16 for Figure 1 A partial enlarged schematic diagram of the structure at A in the middle; Fig.17 for Figure 6 A partial enlarged schematic diagram of the structure at B in the middle; Fig.18 for Figure 7 A partial enlarged schematic diagram of the structure at C in the middle; Fig.19 for Fig.15 A partial enlarged schematic diagram of the structure at point D in the middle.

[0033] Reference numerals: 1-flocculation tank; 11-flocculation water inlet; 12-flocculation water outlet; 13-disturbing member; 14-flocculation flow channel; 141-water inlet flow channel; 141a-first horizontal section; 141b-first arc section; 141c-first vertical section; 141d-second arc section; 141e-third arc section; 142-staggered flow channel; 143-vertical flow channel; 15-cavity; 16-narrow channel; 2-first sedimentation tank; 21-first sedimentation water inlet; 22-first sedimentation water outlet; 23-first sedimentation flow channel; 231-receiving flow channel; 232-T-type flow channel; 232a-second vertical section; 232b-second horizontal section; 232c-first convex head section; 233-L-type flow channel; 233a -third vertical section; 233b-third horizontal section; 233c-fourth arc section; 233d-fourth horizontal section; 3-second sedimentation tank; 31-second sedimentation water inlet; 32-second sedimentation water outlet; 33-second sedimentation flow channel; 331-lower flow channel; 331a-fifth horizontal section; 331b-fifth arc section 331c-second convex section; 332-upper flow channel; 332a-fourth vertical section; 332b-sixth horizontal section; 332c-sixth arc section; 332d-sixth horizontal section; 4-feeding device; 5-steel skeleton; 6-aluminum ash concrete layer; 7-sewage detection device; 8-lifting ring; 9-connecting member; 91-connecting seat; 92-connecting block; 93-fastener. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] It should also be noted that the following specific embodiments or specific implementations are a series of optimized settings listed in the present invention to further explain the specific content of the invention, and these settings can be used in combination or in association with each other.

[0038] The present invention is further explained below in conjunction with specific implementation modes.

[0039] Example 1 like Figure 1-2 As shown, the present embodiment provides an assembled sewage treatment device, comprising a flocculation tank 1, a first sedimentation tank 2, a second sedimentation tank 3 and a feeding device 4; The flocculation tank 1, the first sedimentation tank 2 and the second sedimentation tank 3 are arranged and connected in sequence, and the sewage to be treated passes through the flocculation tank 1, the first sedimentation tank 2 and the second sedimentation tank 3 in sequence to complete the flocculation and sedimentation treatment; The flocculation tank 1, the first sedimentation tank 2 and the second sedimentation tank 3 all include a steel skeleton 5 and an aluminum ash-containing concrete layer 6; The feeding device 4 is connected to the flocculation tank 1 through a pipeline, and the sewage treatment liquid stored in the feeding device 4 enters the flocculation tank 1 from the top of the flocculation tank 1 through the pipeline to mix with the sewage to be treated and flocculate; The sewage treatment liquid is obtained by dissolving sewage treatment materials containing aluminum ash in water.

[0040] When the assembled sewage treatment device disclosed in the present application is working, the sewage to be treated passes through the flocculation tank 1, the first sedimentation tank 2 and the second sedimentation tank 3 in sequence, and the feeding device 4 adds sewage treatment liquid to the flocculation tank 1. The sewage treatment liquid is prepared by dissolving the sewage treatment material containing aluminum ash, and is used to flocculate the sewage in the flocculation tank 1. The feeding device 4 feeds the material through the feeding port at the top of the flocculation tank 1, so that the sewage treatment also moves from top to bottom, and is perpendicular to the flow of the sewage to be treated. The advantages of this feeding method are mainly reflected in two aspects. On the one hand, it can generate a strong shear force, so that the sewage treatment liquid can be quickly dispersed in the water flow. This shear force helps to break the agglomeration of the sewage treatment liquid and improve the mixing uniformity. On the other hand, it can generate vortices, enhance the interaction between fluids, and make the sewage treatment liquid diffuse and mix faster in the water. In addition, as a preferred embodiment, the device adopts two feeding ports to increase the contact area between the liquid medicine and the water flow, thereby promoting the effective mixing of the liquid medicine and the water body.

[0041] like Figure 3-7 As shown, as a further embodiment of the present application, the flocculation tank 1 includes a flocculation water inlet 11, a flocculation water outlet 12, a flow disturbance component 13 and a flocculation flow channel 14; The flocculation water inlet 11 and the flocculation water outlet 12 are arranged on both sides of the flocculation tank 1, and are used for the inlet and outlet of sewage respectively; The flocculation flow channel 14 is arranged in the flocculation tank 1, and is used to guide the flow of sewage and cause disturbance when the sewage flows, thereby improving the flocculation efficiency; The flow disturbing member 13 is disposed between the flocculation channels 14 and is used to generate vortices during the flow of sewage, thereby increasing turbulent kinetic energy and turbulent kinetic energy dissipation rate and thus improving the flocculation effect.

[0042] When the assembled sewage treatment device disclosed in the present application is working, the flow-disturbing member 13 in the flocculation tank 1 mainly plays the role of improving the mixing degree of the water flow in the flocculation tank 1. After research, the applicant found that if there is no flow-disturbing member 13, although the water flow can produce a jet belt at the narrow mouth, the water flow will flow at high speed along one side in a wide area, and a rotating vortex with a slower flow rate will be formed on the other side, which is not conducive to the mixing between fluids and the effective collision between particles. After the flow-disturbing member 13 is added to the wide area, when the water flow has a jet phenomenon at the narrow mouth, the presence of the flow-disturbing member 13 will cause diversion, resulting in a higher flow rate on both sides, increasing the number of vortices near the arc-shaped guide plate and the flow-disturbing member 13, and improving the coagulation effect.

[0043] like Figure 5 As shown, as a further embodiment of the present application, the flocculation channel 14 includes a water inlet channel 141 and a staggered channel 142; The water inlet flow channel 141 includes a first horizontal section 141a, a first arc section 141b, a first vertical section 141c, a second arc section 141d and a third arc section 141e; The first horizontal section 141a is connected to the wall above the water inlet of the flocculation tank 1; One end of the first horizontal section 141a away from the wall above the water inlet of the flocculation tank 1 is connected to the first arc section 141b; The first arc segment 141b and the second arc segment 141d are connected via the first vertical segment 141c; The first arc segment 141b, the first vertical segment 141c and the second arc segment 141d together form a U-shaped structure, and the opening direction of the U-shaped structure is opposite to the water inlet direction of the flocculation tank 1; The third arc segment 141e is disposed at an end of the second arc segment 141d away from the first vertical segment 141c and tends to be away from the side wall of the flocculation water inlet 11; The staggered flow channels 142 are provided in plurality in the flocculation tank 1; The ends of the staggered flow channels 142 are staggeredly connected to the top wall or the bottom wall of the flocculation tank 1 through the vertical flow channels 143, that is, after a staggered flow channel 142 is connected to the top wall, the adjacent staggered flow channel 142 is connected to the bottom wall; The staggered flow channels 142 are of S-shaped wave structures, and the S-shaped wave structures of two adjacent staggered flow channels 142 are arranged non-parallel, that is, there are cavities 15 formed away from each other and narrow passages 16 formed close to each other between the two adjacent staggered flow channels 142; The spoiler member 13 is disposed in the cavity 15 .

[0044] When the assembled sewage treatment device disclosed in the present application is working, the water inlet flow channel 141 expands the space near the flocculation water inlet, which can make the sewage to be treated flow slowly into the flocculation water inlet on the one hand, and facilitate the feeding system to enter the liquid medicine into the device through the feeding port above the flocculation tank 1 through the transport pipeline, and mix with the sewage. A fluid space with a constantly changing width is formed between the staggered flow channels 142. When the water flows upward, a jet phenomenon will be formed at the narrow mouth, and the jet has strong kinetic energy, can generate high impact force, and form eddies and turbulence when mixed with the surrounding fluid. The use of an arc-shaped flow channel makes the tangent direction of the guide wall change constantly, which improves the boundary layer separation phenomenon of the water flow per unit area. The boundary layer separation phenomenon separates the water body into irregular eddies, which can improve the mixing effect of the water flow and enhance the collision efficiency between particles. At the same time, the use of an arc-shaped flow channel can improve the turbulent kinetic energy dissipation rate in the model, so that part of the energy is converted into the energy required for collision between particles in the fluid, improves the effective collision between particles, and thus enhances the flocculation effect. In addition, the flocculation outlet 12 is arranged in a wide area of ​​the arc-shaped guide plate, and no flow-disturbing component 13 is arranged in this area. The reason for this design is to reduce the turbulent kinetic energy and turbulent kinetic energy dissipation rate of the fluid at the outlet, thereby reducing the shear force of the fluid at the outlet and avoiding the breakage of large-diameter flocs formed after flocculation due to excessive shear force.

[0045] like Figure 8-11 As shown, as a further embodiment of the present application, the first sedimentation tank 2 includes a first sedimentation water inlet 21, a first sedimentation water outlet 22 and a first sedimentation flow channel 23; The first sedimentation water inlet 21 and the first sedimentation water outlet 22 are arranged on both sides of the first sedimentation tank 2, and are used for the inlet and outlet of sewage respectively; The first sedimentation water inlet 21 and the flocculation water outlet 12 are arranged opposite to each other; The first sedimentation flow channel 23 is arranged in the first sedimentation tank 2, and is used to reduce the vortex in the fluid, increase the stroke of the fluid, and precipitate large particles of impurities in the fluid.

[0046] like Fig.10 As shown, as a further embodiment of the present application, the first sedimentation channel 23 includes a receiving channel 231, a T-shaped channel 232 and an L-shaped channel 233; One end of the receiving channel 231 is arranged on the side wall at the lower end of the first sedimentation water inlet 21, and the other end is a free end, which is used to receive the fluid flowing out of the flocculation tank 1; The T-shaped flow channel 232 includes a second vertical section 232a, a second horizontal section 232b and a first convex head section 232c; The upper end of the second vertical section 232a is connected to the top wall of the first sedimentation tank 2, and the other end is connected to the second horizontal section 232b; The connection between the second vertical section 232a and the second horizontal section 232b is an arc-shaped chamfered structure; The distance between the receiving flow channel 231 and the second horizontal section 232b is the same as the distance between the second horizontal section 232b and the bottom wall of the first sedimentation tank 2; The first convex head section 232c is located at an end of the second horizontal section 232b away from the first sedimentation water inlet 21; The height of the first convex head section 232c is higher than the height of the second horizontal section 232b; The lower end surface of the first convex head section 232c and the lower end surface of the second horizontal section 232b are on the same horizontal plane; An arc-shaped chamfered structure is formed between the upper end surface of the first convex head section 232c and the upper end surface of the second horizontal section 232b; The L-shaped flow channel 233 includes a third vertical section 233a, a third horizontal section 233b, a fourth arc section 233c and a fourth horizontal section 233d; The lower end of the third vertical section 233a is connected to the bottom wall of the first sedimentation tank 2; The third horizontal section 233b is connected to the side of the third vertical section; The fourth arc segment 233c is connected to one end of the third horizontal segment 233b away from the third vertical segment, and the other end of the fourth arc segment 233c is connected to the fourth horizontal segment 233d.

[0047] When the assembled sewage treatment device disclosed in the present application is working, the T-shaped flow channel 232 in the first sedimentation tank 2 divides the area of ​​the first sedimentation tank 2 into two parts in the horizontal direction. There are two main reasons for this design. On the one hand, the entrance of the first sedimentation tank 2 is relatively high. If the design concept of the second sedimentation tank 3 is followed, not only can the space in the model not be effectively utilized, resulting in waste of space in the sedimentation tank, but also affecting the sedimentation effect of particles in the sedimentation tank. On the other hand, when the water flows out from the flocculation outlet 12, it is in a mixed state, and there are a large number of vortex structures inside the water flow, which is not conducive to sedimentation. The receiving flow channel 231, the T-shaped flow channel 232 and the bottom wall of the first sedimentation tank 2 form a horizontal flow channel of the same width, so that the water flow in the first half becomes smooth, reducing the disorder inside the water flow, and making the particles in a state more conducive to sedimentation. The space in the second half of the model is mainly used for particle sedimentation. The L-shaped flow channel 233 is mainly used to increase the fluid movement path and increase the fluid residence time, thereby improving the sedimentation effect. The first sedimentation outlet 22 is arranged at the bottom of the model for connection with the second sedimentation tank 3, which is convenient for the design of the internal structure of the second sedimentation tank 3. In summary, the main functions of the first sedimentation tank 2 include two aspects. On the one hand, it connects the flocculation tank 1 and the second sedimentation tank 3, reduces the vortex structure in the fluid, reduces the degree of chaos in the fluid, makes the water flow smoother, and the particles in the fluid are in a state more suitable for sedimentation. On the other hand, the first sedimentation tank 2 can be used to settle large-diameter particles and treat some small and medium-diameter particles.

[0048] like Figure 12-15 As shown, as a further embodiment of the present application, the second sedimentation tank 3 includes a second sedimentation water inlet 31, a second sedimentation water outlet 32 ​​and a second sedimentation flow channel 33; The second sedimentation water inlet 31 and the second sedimentation water outlet 32 ​​are arranged on both sides of the second sedimentation tank 3, and are used for the inlet and outlet of sewage respectively; The second sedimentation water inlet 31 and the first sedimentation water outlet 22 are arranged opposite to each other; The second sedimentation channel 33 is disposed in the second sedimentation tank 3 and is used to precipitate particulate impurities in the fluid.

[0049] like Fig.14 As shown, as a further embodiment of the present application, the second sedimentation channel 33 includes a lower layer channel 331 and an upper layer channel 332; The lower flow channel 331 includes a fifth horizontal section 331a, a fifth arc section 331b and a second convex head section 331c; One end of the fifth horizontal section 331a is disposed on the side wall above the second sedimentation water inlet 31, and the other end is connected to the fifth arc section 331b; One end of the fifth arc segment 331b away from the fifth horizontal segment 331a is connected to the second convex head segment 331c; The height of the second protruding head segment 331c is the height of the fifth arc segment 331b; The lower end surface of the second convex head section 331c and the lower end of the connection point of the fifth arc section 331b are on the same horizontal plane; The upper flow channel 332 includes a fourth vertical segment 332a, a sixth horizontal segment 332b, a sixth arc segment 332c and a sixth horizontal segment 332d; The lower end of the fourth vertical section 332a is connected to the bottom wall of the second sedimentation tank 3, and the height of the fourth vertical section 332a in the vertical direction is higher than the lower flow channel 331; The sixth horizontal section 332b is connected to the side of the fourth vertical section 332a; The sixth arc segment 332c is connected to a side of the sixth horizontal segment 332b away from the fourth vertical segment 332a; The other side of the sixth arc segment 332c is connected to the sixth horizontal segment 332d.

[0050] When the assembled sewage treatment device disclosed in the present application is working, the water inlet of the second sedimentation tank 3 is designed at the lower part of the model, which is used to reduce the distance of the particles settling to the bottom surface, so that the particles are more easily settled in the device, and on the other hand, other structures can be used to make full use of the space in the model. The lower layer flow channel 331 and the upper layer flow channel 332 are set in the model, and the device is divided into three areas. On the one hand, the movement path of the fluid in the device is increased, the fluid residence time is increased, and the particles can be settled in all three areas; firstly, compared with the horizontal plate, the effective space in the model is fully utilized, and the area of ​​the second area and the third area is expanded under the premise of producing a very small adverse sedimentation effect on the first area, and the sedimentation effect of the particles in the second area and the third area is improved, thereby improving the sedimentation effect of the particles in the overall model; secondly, compared with the bending plate, the water flow produces a certain vortex structure near the arc guide plate, and the appropriate vortex structure can settle the particles with larger diameters faster on the bottom surface of the guide plate, thereby enhancing the sedimentation effect of the particles with larger diameters in the second area and the third area. The second convex head section 331c is provided inside the second sedimentation tank 3, which can effectively intercept the particles settled in the second area for collecting the sediment, and the sixth horizontal section 332b and the sixth arc section 332c also play a similar role. The design position of the second sedimentation outlet 32 ​​is the same as that of the second sedimentation inlet 31, and the width is also the same. The purpose of this design is that when one sedimentation tank 2 cannot meet the project design requirements, another sedimentation tank identical to the second sedimentation tank 3 can be installed behind the second sedimentation tank 3 to improve the overall particle sedimentation effect of the system.

[0051] like Figure 16-19 As shown, as a further embodiment of the present application, it also includes a sewage detection device 7, a hanging ring 8 and a connecting member 9; The sewage detection device 7 is arranged on the upper side wall of the first sedimentation outlet 22 and the lower side wall of the second sedimentation outlet 32, and is used to monitor the pollutant content of the fluid; The hanging ring 8 is provided in plurality on the flocculation tank 1, the first sedimentation tank 2 and the second sedimentation tank 3; The upper end of the lifting ring 8 is exposed above the aluminum ash-containing concrete layer 6, and the lower end of the lifting ring 8 is buried in the aluminum ash-containing concrete layer 6 and tied and connected to the steel skeleton 5; The connecting member 9 includes a connecting seat 91 and a connecting block 92; The connecting seat 91 and the connecting block 92 are arranged in pairs at corresponding positions on the tops of two adjacent tank bodies of the flocculation tank 1, the first sedimentation tank 2 and the second sedimentation tank 3; The upper parts of the connecting seat 91 and the connecting block 92 are exposed above the aluminum ash concrete and are connected by fasteners 93 , and the bottoms of the connecting seat 91 and the connecting block 92 are buried in the aluminum ash concrete layer 6 and welded to the steel skeleton 5 .

[0052] When the assembled sewage treatment device disclosed in the present application is working, the flocculation tank 1, the first sedimentation tank 2 and the second sedimentation tank 3 are constructed in the factory by 3D printing technology, transported to the working position by consignment, and hoisted by a crane using a previously embedded lifting ring 8 and moved to a preset position. Different components are assembled through a connecting seat 91 and a connecting block 92, and the two components are connected into a whole by a fastener 93 (such as a bolt). When a component in the flocculation tank 1, the first sedimentation tank 2 and the second sedimentation tank 3 loses its original function, the lost component can be replaced by disassembling the fastener 93 and hoisting, so that the entire device can resume operation.

[0053] More preferably, if Figure 1 As shown, the flocculation tank 1 , the first sedimentation tank 2 and the second sedimentation tank 3 can be arranged in multiple groups in parallel, and two adjacent groups are connected by a connecting member 9 .

[0054] Example 2 This embodiment provides a method for preparing aluminum ash-containing concrete. The prepared aluminum ash-containing concrete can be used to prepare the aluminum ash-containing concrete layer described in Example 1.

[0055] Includes steps: S1: Grind and deoxidize the aluminum ash, place the deoxidized aluminum ash in an alkaline solution, add Ca(OH)2 solution to hydrolyze at 95°C for 3 h, separate the reacted substances into solid and liquid to obtain aluminum ash treatment materials; S2: Add 75-90 parts of Portland cement, 120 parts of medium sand, 30 parts of fly ash and 0-15 parts of aluminum ash treated material into a cement paste mixer, and mix them thoroughly to obtain a powdered cement-based material; S3: Add 34.2 parts of water, 0.585 parts of polycarboxylic acid as a water reducing agent, 0.045 parts of cellulose ether as a water retaining agent, 0.045 parts of higher alcohol as a defoaming agent, and 0.045 parts of latex powder, and stir evenly with a magnetic stirrer to obtain a mixed aqueous solution; S4: Slowly add the stirred mixed aqueous solution to the powdered cement-based material to mix and stir evenly to obtain a printing slurry, and slowly add 0.09 parts of epoxy resin gelling agent to the printing slurry to obtain a 3D printing concrete material.

[0056] Table 1 shows the compressive strength of concrete obtained by the experimental example with silicate cement and aluminum ash as variables under 120 parts of medium sand and 30 parts of fly ash.

[0057] Example 3 This embodiment provides a method for preparing aluminum ash-containing concrete. The prepared aluminum ash-containing concrete can be used to prepare the aluminum ash-containing concrete layer described in Example 1.

[0058] Includes steps: S1: Grind and deoxidize the aluminum ash, place the deoxidized aluminum ash in an alkaline solution, add Ca(OH)2 solution to hydrolyze at 95°C for 3 h, separate the reacted substances into solid and liquid to obtain aluminum ash treatment materials; S2: Add 85-100 parts of Portland cement, 100 parts of medium sand, 20 parts of fly ash and 0-15 parts of aluminum ash treated materials into a cement slurry mixer and mix them thoroughly to obtain a powdered cement-based material. S3: Add 38 parts of water, 0.65 parts of polycarboxylic acid as a water reducing agent, 0.05 parts of cellulose ether as a water retaining agent, 0.05 parts of higher alcohol as a defoaming agent, and 0.05 parts of latex powder, and stir evenly with a magnetic stirrer to obtain a mixed aqueous solution; S4: Slowly add the stirred mixed aqueous solution to the powdered cement-based material to mix and stir evenly to obtain a printing slurry, and slowly add 0.1 parts of epoxy resin gelling agent to the printing slurry to obtain a 3D printing concrete material.

[0059] Table 2 shows the compressive strength of concrete obtained by the experimental example with silicate cement and aluminum ash as variables under 100 parts of medium sand and 20 parts of fly ash.

[0060] Example 4 This embodiment provides a method for preparing aluminum ash-containing concrete. The prepared aluminum ash-containing concrete can be used to prepare the aluminum ash-containing concrete layer described in Example 1.

[0061] Includes steps: S1: Grind and deoxidize the aluminum ash, place the deoxidized aluminum ash in an alkaline solution, add Ca(OH)2 solution to hydrolyze at 95°C for 3 h, separate the reacted substances into solid and liquid to obtain aluminum ash treatment materials; S2: Add 95-110 parts of Portland cement, 90 parts of medium sand, 10 parts of fly ash and 0-15 parts of aluminum ash treated materials into a cement slurry mixer and mix thoroughly to obtain a powdered cement-based material. S3: Add 41.8 parts of water, 0.72 parts of polycarboxylic acid as a water reducing agent, 0.055 parts of cellulose ether as a water retaining agent, 0.055 parts of higher alcohol as a defoaming agent, and 0.055 parts of latex powder, and stir evenly with a magnetic stirrer to obtain a mixed aqueous solution; S4: Slowly add the stirred mixed aqueous solution to the powdered cement-based material to mix and stir evenly to obtain a printing slurry, and slowly add 0.11 parts of epoxy resin gelling agent to the printing slurry to obtain a 3D printing concrete material.

[0062] Table 3 shows the compressive strength of concrete obtained by the experimental example with silicate cement and aluminum ash as variables under 90 parts of medium sand and 10 parts of fly ash.

[0063] The compressive strength data shown in Table 1, Table 2, and Table 3 are the compressive strength of concrete tested with reference to GB 50081-2019 "Standard for Test Methods for Physical and Mechanical Properties of Concrete". When the ratio of other materials is as shown above, the compressive strength of concrete decreases rapidly with the increase in the number of aluminum ash-treated materials after the aluminum ash-treated materials exceed 10 parts, so the amount of aluminum ash-treated materials used is preferably not more than 10 parts. In addition, aluminum ash materials can inhibit the early hydration heat release of concrete cementitious materials when preparing concrete, reducing the risk of concrete cracking, and too little aluminum ash also loses the meaning of using aluminum ash to make concrete, so the amount of aluminum ash used is preferably not less than 5 parts. At the same time, the analysis of the experimental examples found that more preferred concrete printing materials were summarized. Add 90-105 parts of silicate cement, 90-100 parts of medium sand, 10-20 parts of fly ash and 5-10 parts of aluminum ash treated materials into a cement slurry mixer, stir well to obtain a powdered cement-based material; add 38-41.8 parts of water, 0.65-0.72 parts of polycarboxylic acid as a water reducer, 0.05-0.055 parts of cellulose ether as a water retaining agent, 0.05-0.055 parts of high carbon alcohol as a defoaming agent and 0.05-0.055 parts of latex powder, stir evenly with a magnetic stirrer to obtain a mixed aqueous solution; slowly add the stirred mixed aqueous solution into the powdered cement-based material to mix and stir evenly to obtain a printing slurry, and slowly add 0.1-0.11 parts of epoxy resin gelling agent into the printing slurry to obtain a 3D printing concrete material.

[0064] Example 5 This example provides a method for preparing polyaluminium chloride powder using aluminium ash. The prepared polyaluminium chloride powder can be used for the subsequent preparation of sewage treatment materials containing aluminium ash.

[0065] Includes steps: X11: Weigh 10 parts of aluminum ash, add 20-40 parts of deionized water, mix well, then add 30 parts of 33% hydrochloric acid, and seal the beaker; X12: Place the beaker in a magnetic stirring water bath, maintain the temperature at 70°C, react for 3 h, and then cool to room temperature; X13: The reaction solution was sealed and placed in an oven, aged at 60°C for 36 h, and filtered to obtain a PAC solution; X14: Place the solution in a constant temperature drying oven, dry it at 180°C for 2 h, and grind it to obtain polyaluminium chloride powder.

[0066] Table 4 shows the mass fraction of aluminum oxide and basicity of the polyaluminium chloride powder obtained from the experimental example with deionized water as the variable.

[0067] The alumina mass fraction and basicity data shown in Table 4 are tested with reference to GB 15892-2020 "Polyaluminum Chloride for Drinking Water". It can be seen from the test results that with the increase in the number of deionized water, the mass fraction of alumina in the prepared polyaluminum chloride powder increases and the basicity decreases, especially when the deionized water changes from 30 parts to 40 parts, the change is obvious. Due to the balance between the mass fraction of alumina and the basicity, the number of deionized water taken in Test Example 24 is more preferred.

[0068] Example 6 The other steps are the same as those in Example 5, except that the reaction temperature is changed from 70°C to 60°C by using the amount of deionized water in Experimental Example 24.

[0069] Example 7 The other steps are the same as those in Example 5, except that the reaction temperature is changed from 70°C to 80°C by using the amount of deionized water in Experimental Example 24.

[0070] Example 8 The other steps are the same as those in Example 5, except that the aging temperature of 60°C is changed to 50°C by using the amount of deionized water in Experimental Example 24.

[0071] Example 9 The other steps are the same as those in Example 5, except that the aging temperature is changed from 60°C to 70°C by using the amount of deionized water in Experimental Example 24.

[0072] Example 10 The other steps are the same as those in Example 5, except that the reaction time of 3 h is changed to 2.5 h by using the amount of deionized water in Experimental Example 24.

[0073] Embodiment 11 The other steps are the same as those in Example 5, except that the reaction time is changed from 3 h to 3.5 h by using the amount of deionized water in Experimental Example 24.

[0074] Example 12 The other steps are the same as those in Example 5, except that the amount of deionized water used in Experimental Example 24 is used to change the aging time from 36 h to 24 h.

[0075] Embodiment 13 The other steps are the same as those in Example 5, except that the time 36 h is changed to 48 h by using the amount of deionized water in Experimental Example 24.

[0076] Table 5 shows the mass fraction of aluminum oxide and basicity data in polyaluminum chloride powder of Examples 6-13

[0077] The alumina mass fraction and basicity data shown in Table 5 are tested with reference to GB 15892-2020 "Polyaluminum Chloride for Drinking Water". It can be seen from the test results that with the increase of reaction temperature, the alumina content and basicity in polyaluminum chloride show a trend of first rising and then falling. This may be due to the fact that the reaction temperature is too low and the polymerization reaction is insufficient. If the reaction temperature is too high, the polymerized structure will be destroyed, resulting in polymer decomposition. Therefore, the reaction temperature is preferably 70 °C. With the increase of aging temperature, the alumina content and basicity in polyaluminum chloride also show a trend of first rising and then falling. This may be due to the increase of aging temperature and the volatilization of part of the hydrochloric acid. Therefore, the aging temperature is preferably 60 °C. With the increase of reaction time and aging time, the alumina content and basicity in polyaluminum chloride both increase. However, considering the needs of the actual process, the preferred reaction time is 3 h and the aging time is 36 h.

[0078] Embodiment 14 The present example provides a method for preparing copper oxide-loaded oyster shell powder. The prepared copper oxide-loaded oyster shell powder can be used for the subsequent preparation of aluminum ash-containing sewage treatment materials.

[0079] Includes steps: Take 5 parts of oyster shell powder and soak them in 100 parts of (0.0625 mol / L) Cu(NO3)23H2O solution, stir magnetically at room temperature for 6 hours, filter, place the filtered material in a constant temperature drying oven, dry it at 70°C for 4 hours, take it out and wash it with deionized water and anhydrous ethanol 5 times, put it in a 500°C muffle furnace and calcine it for 2 hours, take it out and grind it to obtain copper oxide-loaded oyster shell.

[0080] Embodiment 15 The other steps are the same as those of Example 14, except that the concentration of 5 portions of oyster shell powder is changed from 0.0625 mol / L to 0.125 mol / L by soaking them in 100 ml (0.0625 mol / L) Cu(NO3)23H2O solution.

[0081] Example 16 The other steps are the same as those of Example 14, except that 5 portions of oyster shell powder are immersed in 100 ml (0.0625 mol / L) Cu(NO3)23H2O solution, and the concentration thereof is changed from 0.0625 mol / L to 0.1875 mol / L.

[0082] Embodiment 17 The other steps are the same as those of Example 14, except that the concentration of 5 portions of oyster shell powder is changed from 0.0625 mol / L to 0.25 mol / L in 100 ml (0.0625 mol / L) Cu(NO3)23H2O solution.

[0083] Embodiment 18 The other steps are the same as those of Example 14, except that the concentration of 5 portions of oyster shell powder is changed from 0.0625 mol / L to 0.3125 mol / L by soaking them in 100 ml (0.0625 mol / L) Cu(NO3)23H2O solution.

[0084] Table 6 shows the antibacterial effect data of oyster shell powder loaded with copper oxide in Examples 14-18

[0085] The antibacterial effect data of Escherichia coli shown in Table 6 were tested with reference to GB / T 21510-2008 "Test Method for Antibacterial Performance of Nanoinorganic Materials". It can be seen from the test results that as the concentration of Cu(NO3)23H2O solution increases, the antibacterial effect of Escherichia coli of the prepared oyster shell powder loaded with copper oxide becomes better. At the same time, the antibacterial effect of Example 14 is poor. After Example 17, the concentration of Cu(NO3)23H2O solution is further increased, and the antibacterial effect of Escherichia coli of the prepared oyster shell powder loaded with copper oxide is limited. Therefore, taking 5 parts of oyster shell powder and soaking it in 100 parts (0.1875-0.25 mol / L) Cu(NO3)23H2O solution is a better solution for preparing oyster shell powder loaded with copper oxide.

[0086] Embodiment 19 The method for preparing the sewage treatment material containing aluminum ash provided in this embodiment can be used to prepare the sewage treatment liquid in Example 1 after adding water.

[0087] Includes steps: Weigh 10 parts of polyaluminium chloride (the preparation method of polyaluminium chloride is the product obtained in Test Example 24 in Example 5), 0 parts of polyacrylamide, and 0 parts of oyster shell powder loaded with copper oxide (the preparation method of oyster shell powder loaded with copper oxide is the product obtained in Example 16), stir magnetically for 4 hours, and stand for 30 minutes. Put it in a constant temperature drying oven, dry it at 70°C to constant weight, take it out and stand it to cool to obtain a polyaluminium chloride-polyacrylamide-copper oxide-oyster shell composite material (PAC-PAM-CuO-Os).

[0088] Embodiment 20 The other steps are the same as those in Example 19 except that the amount of polyacrylamide is changed from 0 part to 0.1 part.

[0089] Embodiment 21 The other steps are the same as those in Example 19 except that the amount of polyacrylamide is changed from 0 part to 0.2 part.

[0090] Embodiment 22 The other steps are the same as those in Example 19 except that the amount of polyacrylamide is changed from 0 part to 0.5 part.

[0091] Embodiment 23 The other steps are the same as those in Example 19 except that the amount of polyacrylamide is changed from 0 part to 1 part.

[0092] Embodiment 24 The other steps were the same as those in Example 19 except that the polyacrylamide was changed from 0 parts to 0.1 parts and the oyster shell powder loaded with copper oxide was changed from 0 parts to 5 parts.

[0093] Embodiment 25 The other steps were the same as those in Example 19 except that the polyacrylamide was changed from 0 parts to 0.1 parts and the oyster shell powder loaded with copper oxide was changed from 0 parts to 10 parts.

[0094] Embodiment 26 The other steps were the same as those in Example 19 except that the polyacrylamide was changed from 0 parts to 0.1 parts and the oyster shell powder loaded with copper oxide was changed from 0 parts to 20 parts.

[0095] Embodiment 27 The other steps were the same as those in Example 19 except that the polyacrylamide was changed from 0 parts to 0.1 parts and the oyster shell powder loaded with copper oxide was changed from 0 parts to 40 parts.

[0096] Embodiment 28 The other steps were the same as those in Example 19 except that the polyacrylamide was changed from 0 parts to 0.1 parts and the oyster shell powder loaded with copper oxide was changed from 0 parts to 60 parts.

[0097] Embodiment 29 The other steps were the same as those in Example 19 except that the polyacrylamide was changed from 0 parts to 0.1 parts and the oyster shell powder loaded with copper oxide was changed from 0 parts to 80 parts.

[0098] Table 7 shows the turbidity removal rate and antibacterial effect data of the polyaluminium chloride-polyacrylamide-copper oxide-oyster shell composite material in Examples 19-29

[0099] The E. coli antibacterial effect data shown in Table 7 were tested with reference to GB / T 21510-2008 "Test Method for Antibacterial Performance of Nano-inorganic Materials", while the turbidity removal rate data were tested using a portable turbidity meter. The test results show that the addition of polyacrylamide can effectively improve the turbidity removal rate. This may be because polyacrylamide, as a high molecular polymer, can improve the removal efficiency of suspended solids in water by enhancing the charge neutralization effect of polyaluminium chloride. However, as the amount of polyacrylamide added increases, the turbidity removal rate decreases. This may be because polyacrylamide will form too many bridges between particles, resulting in too large flocs and loose structures, which will reduce the turbidity removal rate. When oyster shell powder loaded with copper oxide is added to polyaluminum chloride, the turbidity removal rate of the polyaluminum chloride-polyacrylamide-copper oxide-oyster shell composite material decreases and the antibacterial effect of Escherichia coli improves with the increase of the added amount. Therefore, considering the sewage treatment effect of the polyaluminum chloride-polyacrylamide-copper oxide-oyster shell composite material comprehensively, the polyaluminum chloride-polyacrylamide-copper oxide-oyster shell composite material prepared by adding 0.1-0.2 parts of polyacrylamide and 40-60 parts of oyster shell powder loaded with copper oxide is selected as the optimal solution.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An assembled sewage treatment device, characterized in that: It includes a flocculation tank, a first sedimentation tank, a second sedimentation tank and a feeding device; The flocculation tank, the first sedimentation tank and the second sedimentation tank are arranged and connected in sequence, and the sewage to be treated passes through the flocculation tank, the first sedimentation tank and the second sedimentation tank in sequence to complete flocculation and sedimentation treatment; The flocculation tank, the first sedimentation tank and the second sedimentation tank all include a steel skeleton and a aluminum ash-containing concrete layer; The feeding device is connected to the flocculation tank through a pipeline, and the sewage treatment liquid stored in the feeding device enters the flocculation tank from the top of the flocculation tank through the pipeline to mix with the sewage to be treated and flocculate; The sewage treatment liquid is obtained by dissolving sewage treatment materials containing aluminum ash in water.

2. The assembled sewage treatment device according to claim 1, characterized in that: The flocculation tank comprises a flocculation water inlet, a flocculation water outlet, a flow disturbing component and a flocculation flow channel; The flocculation water inlet and the flocculation water outlet are arranged on both sides of the flocculation tank, and are used for the inlet and outlet of sewage respectively; The flocculation flow channel is arranged in the flocculation tank, and is used to guide the flow of sewage and cause disturbance when the sewage flows, thereby improving the flocculation efficiency; The flow-disturbing member is arranged between the flocculation channels, and is used to generate vortices during the flow of sewage, thereby increasing turbulent kinetic energy and turbulent kinetic energy dissipation rate and thus improving the flocculation effect.

3. The assembled sewage treatment device according to claim 1, characterized in that: The first sedimentation tank comprises a first sedimentation water inlet, a first sedimentation water outlet and a first sedimentation flow channel; The first sedimentation water inlet and the first sedimentation water outlet are arranged on both sides of the first sedimentation tank, and are used for the inlet and outlet of sewage respectively; The first sedimentation water inlet and the flocculation water outlet are arranged opposite to each other; The first sedimentation flow channel is arranged in the first sedimentation tank, and is used to reduce the vortex in the fluid, increase the stroke of the fluid, and precipitate large particles of impurities in the fluid.

4. The assembled sewage treatment device according to claim 1, characterized in that: The second sedimentation tank comprises a second sedimentation water inlet, a second sedimentation water outlet and a second sedimentation flow channel; The second sedimentation water inlet and the second sedimentation water outlet are arranged on both sides of the second sedimentation tank, and are used for the inlet and outlet of sewage respectively; The second sedimentation water inlet and the first sedimentation water outlet are arranged opposite to each other; The second sedimentation flow channel is arranged in the second sedimentation tank and is used for sedimenting particulate impurities in the fluid.

5. The assembled sewage treatment device according to claim 1, characterized in that: Also included is a sewage detection device; The sewage detection device is arranged on the upper side wall of the first sedimentation outlet and on the lower side wall of the second sedimentation outlet, and is used to monitor the pollutant content of the fluid.

6. The assembled sewage treatment device according to claim 1, characterized in that: Also includes lifting rings and connecting members; The hanging ring is provided in plurality on the flocculation tank, the first sedimentation tank and the second sedimentation tank; The upper end of the lifting ring is exposed above the aluminum ash-containing concrete layer, and the lower end of the lifting ring is buried in the aluminum ash-containing concrete layer and tied and connected to the steel bar skeleton; The connecting member comprises a connecting seat and a connecting block; The connecting seat and the connecting block are arranged in pairs at corresponding positions on the tops of two adjacent tank bodies of the flocculation tank, the first sedimentation tank and the second sedimentation tank; The upper parts of the connection seat and the connection block are exposed above the aluminum ash-containing concrete and are connected by fasteners, and the bottoms of the connection seat and the connection block are buried in the aluminum ash-containing concrete layer and welded to the steel frame.

7. A method for preparing aluminum ash-containing concrete according to claim 1, characterized in that: The method comprises the following steps: S1: grinding and deoxidizing aluminum ash, placing the deoxidized aluminum ash in an alkaline solution, adding a Ca(OH)2 solution to hydrolyze the aluminum ash at 95°C for 3 hours, and performing solid-liquid separation on the reacted material to obtain an aluminum ash treatment material; S2: Add 75-110 parts of Portland cement, 90-120 parts of medium sand, 10-30 parts of fly ash and 0-15 parts of aluminum ash treated material into a cement paste mixer, and mix well to obtain a powdered cement-based material; S3: Add 34.2-41.8 parts of water, 0.585-0.72 parts of water reducing agent, 0.045-0.055 parts of water retaining agent, 0.045-0.055 parts of defoaming agent and 0.0.45-0.055 parts of latex powder, stir evenly with a magnetic stirrer to obtain a mixed aqueous solution; S4: slowly add the stirred mixed aqueous solution to the powdered cement-based material to mix and stir evenly to obtain a printing slurry, and slowly add 0.09-0.11 parts of epoxy resin gelling agent to the printing slurry to obtain a 3D printing concrete material.

8. The method for preparing aluminum ash-containing concrete according to claim 7, characterized in that: In step S3, the water reducing agent is polycarboxylic acid, the water retaining agent is cellulose ether, and the defoaming agent is high carbon alcohol.

9. A method for preparing the sewage treatment material containing aluminum ash according to claim 1, characterized in that: Includes steps: X1: Weigh 5-15 parts of aluminum ash, add 20-40 parts of deionized water, mix well, then add 30 parts of 31%-35% hydrochloric acid, and seal the beaker; place the beaker in a magnetic stirring water bath, keep the temperature at 60-80°C for reaction, wait for the reaction for 2.5-3.5 hours, and cool to room temperature; seal the solution after the reaction and place it in an oven, mature at 50-70°C for 24-48 hours, and filter to obtain a PAC solution; Place the solution in a constant temperature drying oven, dry at 170-200°C for 1.5-2.5 h, grind to obtain polyaluminium chloride powder; X2: Take 3-10 parts of oyster shell powder and soak them in 100 parts of 0.0625-0.3125 mol / L Cu(NO3)2 3H2O solution, stir magnetically at room temperature for 5-7 hours, filter, place the filtered material in a constant temperature drying oven, dry it at 60-80 ℃ for 3-5 hours, take it out and wash it with deionized water and anhydrous ethanol for 3-5 times, put it in a muffle furnace at 400-600 ℃ and calcine it for 1-2 hours, take it out and grind it to obtain copper oxide-loaded oyster shell; X3: Weigh 5-15 parts of polyaluminium chloride, 0-1 part of polyacrylamide, and 0-80 parts of oyster shell powder loaded with copper oxide, stir magnetically for 3-5 hours, and let stand for 30 minutes; put into a constant temperature drying oven, dry to constant weight at 60-80°C, take out and let stand to cool to obtain polyaluminium chloride-polyacrylamide-copper oxide-oyster shell composite material (PAC-PAM-CuO-Os).

10. The method for preparing sewage treatment materials containing aluminum ash according to claim 9, characterized in that: The oyster shell powder has a grinding fineness of 200-2000 meshes and is calcined at 300-400°C for 2-4 hours.

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