Combined equipment for efficient chemical phosphorus removal

Abstract

The utility model discloses combined equipment for high-efficiency chemical phosphorus removal. The combined equipment is characterized in that an integrated high-efficiency sedimentation tank is arranged at the front part in a total tank body; an integrated microporous filter is arranged at the rear part in the main tank body; a water inlet is formed in the front end of the integrated efficient sedimentation tank; the front part of the integrated microporous filter is provided with a water inlet cylinder, and the rear part is provided with a filtered water outlet; and a water outlet well of the integrated efficient sedimentation tank is connected with a water inlet cylinder at the front part of the integrated microporous filter. The equipment is formed by combining integrated equipment, the occupied area is small, and the construction period is short; the total phosphorus removal advantage is obvious, and the load impact resistance is high; the quality of treated water is relatively stable, is superior to the first-level A discharge standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002), and is suitable for substandard treatment of total phosphorus in urban domestic sewage or upgrading and reconstruction of the first-level B standard to the first-level A standard in cities and towns.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment and resource utilization, in particular to a combined device for efficient chemical phosphorus removal. Background Art

[0002] Chemical phosphorus removal technology is mainly due to the need to control the phosphorus content in water bodies. Phosphorus is one of the key factors in eutrophication of water bodies. Excessive phosphorus can lead to excessive growth of algae and other aquatic plants, which in turn causes a series of environmental problems, such as water hypoxia and water quality deterioration. Therefore, effectively removing phosphorus from sewage has become an important task in the field of environmental protection.

[0003] Chemical phosphorus removal is a technology that adds specific chemical reagents (such as copper sulfate, ferric chloride, aluminum salt, iron salt, etc.) to react with phosphates in sewage to form insoluble phosphate precipitates, and then removes phosphorus from sewage through solid-liquid separation. This process has the advantages of simple operation, good phosphorus removal effect, and high treatment efficiency, so it has been widely used in the field of sewage treatment.

[0004] With the continuous improvement of environmental protection requirements, chemical phosphorus removal technology is also constantly developing and improving. At present, the main research directions of chemical phosphorus removal technology include the optimization of chemical agents, the optimization of process flow and the combination with other sewage treatment technologies. Through these studies, the treatment effect of chemical phosphorus removal technology can be further improved, the treatment cost can be reduced, the amount of sludge generated can be reduced, so as to better meet environmental protection requirements.

[0005] Although the current chemical phosphorus removal process has many advantages, it also has some problems, such as large dosage of reagents, large amount of sludge generated, and easy to cause secondary pollution.

[0006] In view of this, the present utility model is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide a combined equipment for efficient chemical phosphorus removal, which can stably and effectively remove total phosphorus, SS and part of COD in sewage, and has a small footprint, strong load impact resistance and simple operation, thereby solving the above-mentioned technical problems existing in the prior art.

[0008] The purpose of this utility model is achieved through the following technical solutions:

[0009] A combined device for efficient chemical phosphorus removal, comprising:

[0010] The main tank body, integrated high-efficiency sedimentation tank and integrated microporous filter; among them,

[0011] The integrated high-efficiency sedimentation tank is arranged in the front part of the main tank body;

[0012] The integrated microporous filter is arranged at the rear of the main pool body;

[0013] The integrated high-efficiency sedimentation tank has a water inlet at the front end and a water outlet well at the rear end;

[0014] The integrated microporous filter is provided with a water inlet cylinder at the front and a filtered water outlet at the rear;

[0015] The outlet well of the integrated high-efficiency sedimentation tank is connected to the water inlet cylinder at the front of the integrated microporous filter.

[0016] Compared with the prior art, the combined equipment for efficient chemical phosphorus removal provided by the utility model has the following beneficial effects:

[0017] By integrating an integrated high-efficiency sedimentation tank and an integrated microporous filter in the main tank body, a high-efficiency chemical phosphorus removal equipment is formed, which can stably and effectively remove total phosphorus, SS, and part of COD by coordinating high-efficiency sedimentation with microporous filtration. The equipment has a small footprint, a short construction period, strong load impact resistance, and simple operation. It is suitable for deep chemical phosphorus removal treatment in urban sewage treatment plants or upgrading and transforming urban Class I B standards to Class I A standards, meeting the phosphorus removal requirements of urban sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of a combined device for efficient chemical phosphorus removal provided in an embodiment of the utility model.

[0020] Figure 2 A cross-sectional schematic diagram of a combined device for efficient chemical phosphorus removal provided in an embodiment of the utility model.

[0021] The components corresponding to the marks in the figure are: 1-water inlet area; 2-mixing area; 3-main reaction area; 4-diversion area; 5-water collecting trough; 6-water outlet well; 7-main reaction area lifting device; 8-sludge scraper; 9-sludge screw pump; 10-sludge trough; 11-water inlet cylinder; 12-filter disc; 13-driving device; 14-backwash pump; 15-slag outlet; 16-V-shaped slag outlet; 17-water outlet weir; 18-steel structure tank body; 19-water outlet pipe; 20-pre-sedimentation area; 21-concentration area; 22-inclined tube sedimentation area; 23-clear water area; 24-total tank body; A-water inlet end; B-water outlet end; C-sludge discharge end. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments, which does not constitute a limitation of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0023] First, the terms that may be used in this article are explained as follows:

[0024] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0025] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0026] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0027] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection 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 this article can be understood according to specific circumstances.

[0028] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0029] The scheme provided by the utility model is described in detail below. The contents not described in detail in the embodiments of the utility model belong to the prior art known to professional and technical personnel in the field. If no specific conditions are specified in the embodiments of the utility model, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers of the reagents or instruments used in the embodiments of the utility model are not specified, they are all conventional products that can be purchased commercially.

[0030] like Figure 1 , Figure 2 As shown, the embodiment of the utility model provides a combined device for efficient chemical phosphorus removal, comprising:

[0031] The main tank body, integrated high-efficiency sedimentation tank and integrated microporous filter; among them,

[0032] The integrated high-efficiency sedimentation tank is arranged in the front part of the main tank body;

[0033] The integrated microporous filter is arranged at the rear of the main pool body;

[0034] The integrated high-efficiency sedimentation tank has a water inlet at the front end and a water outlet well at the rear end;

[0035] The integrated microporous filter is provided with a water inlet cylinder at the front and a filtered water outlet at the rear;

[0036] The outlet well of the integrated high-efficiency sedimentation tank is connected to the water inlet cylinder at the front of the integrated microporous filter.

[0037] Preferably, in the above combined equipment, the integrated high-efficiency sedimentation tank comprises: a reaction zone and a clarification zone which are arranged and connected in sequence from front to back, wherein:

[0038] The reaction zone is composed of a water inlet zone, a mixing zone, a main reaction zone and a diversion zone connected in sequence; wherein,

[0039] The water inlet zone and the mixing zone are arranged on the side of the main reaction zone, and the guide zone is arranged behind the mixing zone and the main reaction zone;

[0040] The clarification zone includes: an inlet pre-sedimentation zone, an inclined tube sedimentation zone, a clear water zone and a concentration zone; wherein,

[0041] The inlet pre-settling area is connected to the guide area;

[0042] The inclined tube sedimentation zone is arranged above the inlet pre-sedimentation zone;

[0043] The clean water area is located above the inclined tube sedimentation area, and the clean water area is connected to the water outlet well arranged at the rear end through the water collecting trough;

[0044] The concentration zone is arranged below the inlet pre-sedimentation zone and at the bottom of the clarification zone.

[0045] Preferably, in the above combined equipment, the clarification zone further comprises: a sludge scraper and a sludge screw pump;

[0046] The scraper is arranged in the concentration area from top to bottom, and can scrape the sludge in the concentration area to the sludge tank;

[0047] The sludge screw pump is arranged in the equipment room below the main reaction zone, the sludge inlet end of the sludge screw pump is connected to the concentration zone, one of the two sludge outlet ends of the sludge screw pump is connected back to the main reaction zone, and the other sludge outlet end is connected to an external sludge storage tank.

[0048] Preferably, in the above-mentioned combined equipment, the mixing zone is provided with a stirring device and a reagent adding device capable of adding a coagulant.

[0049] Preferably, in the above combined device, the integrated microporous filter comprises:

[0050] Steel structure tank body, water inlet cylinder, filter disc assembly, slag discharge assembly, backwash device, mud discharge pipe and water outlet pipe; among them,

[0051] The water inlet cylinder is arranged on the steel structure pool body, and the water inlet cylinder is communicated with the steel structure pool body;

[0052] The filter disc assembly is arranged in the steel structure pool body;

[0053] The slag discharge assembly is arranged in the steel structure pool body, on the side of the filter disc assembly;

[0054] The backwashing device is arranged on the steel structure tank body, and the high-pressure water head of the backwashing device is arranged in the steel structure tank body, and can wash the disc of the filter disc assembly;

[0055] The mud discharge pipe is connected to the bottom of the steel structure tank body;

[0056] The water outlet pipe is arranged at the rear end of the steel structure tank body.

[0057] Preferably, in the above combined device, the filter disc assembly is a split structure, consisting of a base, a plurality of filter discs, a disc support frame and a driving device;

[0058] The multiple discs are arranged in sequence on the disc support frame at intervals, and the disc support frame is arranged on the base through a rotating shaft. The driving device is transmission-connected with the rotating shaft and can drive the rotating shaft to drive the disc support frame with multiple filter discs inserted to rotate on the base.

[0059] Preferably, in the above-mentioned combined device, each filter disc is installed on the disc support frame in a plug-in manner and can be replaced individually.

[0060] Preferably, the above-mentioned integrated microporous filter further comprises: a water outlet weir, which is arranged at the rear end of the steel structure pool body and in front of the water outlet pipe.

[0061] Preferably, in the above-mentioned combined equipment, the slag discharge component adopts a V-shaped slag discharge trough.

[0062] In summary, it can be seen that the combined equipment of the embodiment of the utility model can realize efficient chemical phosphorus removal by coordinating efficient sedimentation and microporous filtration through the arrangement of an integrated high-efficiency sedimentation tank and an integrated microporous filter connected in sequence in the total tank body, and can stably and effectively remove total phosphorus, SS, and part of COD. Due to its integrated structure, it occupies a small area, has a short construction period, strong load impact resistance, simple operation, and relatively stable treated water quality, which is better than the Class A emission standard of the "Pollutant Discharge Standard for Urban Sewage Treatment Plants" (GB18918-2002). It is suitable for the upgrading and transformation of urban domestic sewage that does not meet the total phosphorus treatment standard or the upgrading of the Class B standard to the Class A standard, and meets the requirements of urban sewage treatment for phosphorus removal.

[0063] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the solution provided by the embodiments of the present invention is described in detail with specific embodiments below.

[0064] Example 1

[0065] This embodiment provides a combined equipment for efficient chemical phosphorus removal with high treatment efficiency, large water output per unit area, strong adaptability, strong resistance to shock loads, stable treatment efficiency and small footprint, which can solve the problem that the existing sewage treatment land area is large and the total phosphorus effluent is difficult to meet the standard.

[0066] The combined equipment for efficient chemical phosphorus removal of this embodiment can be used for deep chemical phosphorus removal treatment of urban sewage and upgrading of existing urban sewage treatment plants. The specific structure is as follows: Figure 1 , Figure 2As shown, it includes: a main tank body 24 and an integrated high-efficiency sedimentation tank and an integrated microporous filter which are arranged in the main tank body and connected in sequence; wherein,

[0067] The integrated high-efficiency sedimentation tank consists of a reaction zone and a clarification zone. The reaction zone includes a water inlet zone 1, a mixing zone 2, a main reaction zone 3 and a diversion zone 4 connected in sequence; the clarification zone includes a pre-sedimentation zone 20, an inclined tube sedimentation zone 22, a clear water zone 23 and a concentration zone 21.

[0068] The treatment process of the integrated high-efficiency sedimentation tank is as follows: sewage flows into the mixing zone 2 through the water inlet zone 1, polyaluminium chloride (PAC) is added to the mixing zone 2, and the rapid coagulation reaction of the reagent and raw water is completed through the lifting and mixing action of the agitator and enters the main reaction zone 3 from the bottom, anionic polyacrylamide (PAM) is added to the bottom of the main reaction zone 3, and then the sludge refluxed from the concentration zone 21 of the clarification zone through the sludge screw pump 9, the reagent added by the dosing device and the raw water are lifted to the main reaction zone 3 through the impeller serving as the main reaction zone lifting device 7 for slow flocculation reaction to form larger flocs; the flocs slowly enter the pre-sedimentation zone 20 from the diversion zone 4 so that most of the flocs are precipitated in the pre-sedimentation zone 20, and the remaining flocs enter the inclined tube sedimentation zone 22 to complete the remaining floc precipitation process. The clean water after precipitation is clarified in the clean water area 23, collected by the water collection tank 5 and flows into the outlet well 6 to the integrated microporous filter; the sludge precipitated in the concentration area 21 is scraped to the sludge tank by the scraper, and then returned to the main reaction area 3 or discharged to the sludge storage tank through the sludge screw pump 9.

[0069] The integrated microporous filter is mainly composed of a steel structure tank body 18, a water inlet cylinder 11, a filter disc assembly, a V-shaped slag discharge trough 16 as a slag discharge assembly, a backwashing device, a mud discharge pipe, an outlet weir 17 and an outlet pipe 19; wherein, the filter disc assembly is a split structure, consisting of a base and a polyester disc as a filter disc 12, and the working principle is inside-out, the outlet water from the integrated high-efficiency sedimentation tank enters the steel structure tank body 18 through the water inlet cylinder 11, the driving device 13 of the filter disc assembly drives the multiple filter discs 12 of the filter disc assembly to rotate at a uniform speed, and particles larger than 10um are retained on the inner side of the filter disc 12; the filtered water flows into the disinfection facility through the outlet weir 17 for disinfection; the start of the backwash pump 14 of the backwashing device is controlled by the liquid level. When the liquid level in the steel structure tank body 18 is higher than the design liquid level by 0.2 to 0.25 m, the backwash pump 14 is automatically turned on to wash the filter disc 12 with a high-pressure water head. The suspended matter trapped inside the filter disc 12 will fall into the V-shaped slag discharge groove 16 as a slag discharge component, and the mud-water mixture is discharged into the mud storage tank through the mud discharge pipe by gravity. When the water level in the steel structure tank body 18 returns to the design water level, the backwash pump 14 of the backwash device is automatically shut down.

[0070] In summary, the combined equipment of the embodiment of the utility model has at least the following beneficial effects compared with the traditional sewage treatment process:

[0071] (1) The integrated high-efficiency sedimentation tank has strong resistance to shock loads: it is insensitive to fluctuations in influent turbidity and has strong adaptability to low-temperature and low-turbidity raw water.

[0072] (2) The integrated high-efficiency sedimentation tank has strong flocculation ability: the flocs settle quickly and the effluent quality is stable. This is mainly due to the combined application of flocculants, coagulants, activated sludge co-flow and reasonable mechanical coagulation methods.

[0073] (3) The dosage of chemicals in the integrated high-efficiency sedimentation tank is relatively low: through the internal circulation of sludge, 10% to 30% of the dosage of chemicals can be saved.

[0074] (4) The sludge screw pump used as the return pump, the residual sludge pump house and the high-efficiency sedimentation tank are built together under the mixing zone and the main reaction zone. The layout is compact, which saves land and construction investment, and avoids being placed in the open air.

[0075] (5) Compared with the filter cloth filter, the integrated microporous filter has a 2-3 times higher ability to intercept suspended solids in the incoming water. The sewage changes from outside in to inside out, and the sludge cleaning changes from self-priming pump suction backwashing to flushing gravity flow discharge equipment. The number of control units is reduced, the number of equipment wearing parts is reduced, the filter disc surface is smooth, and there is no longer a problem of sludge clogging.

[0076] (6) The filter disc assembly of the integrated microporous filter is a split structure, consisting of a base and a polyester insert. When replacing, only the insert needs to be replaced. The operation is convenient, simple and cost-saving.

[0077] (7) The backwashing device of the integrated microporous filter is a high-pressure nozzle that sprays the filter disc. The particles trapped inside the disc can basically all enter the mud discharge device, and then the mud and water mixture is discharged into the mud storage tank through gravity flow. The backwashing effect is better than that of the filter cloth filter and the operating cost is lower.

[0078] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the utility model, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A combined device for efficient chemical phosphorus removal, characterized in that: include: The main tank body, integrated high-efficiency sedimentation tank and integrated microporous filter; among them, The integrated high-efficiency sedimentation tank is arranged in the front part of the main tank body; The integrated microporous filter is arranged at the rear of the main pool body; The integrated high-efficiency sedimentation tank has a water inlet at the front end and a water outlet well at the rear end; The integrated microporous filter is provided with a water inlet cylinder at the front and a filtered water outlet at the rear; The outlet well of the integrated high-efficiency sedimentation tank is connected to the water inlet cylinder at the front of the integrated microporous filter.

2. The combined equipment for efficient chemical phosphorus removal according to claim 1, characterized in that: The integrated high-efficiency sedimentation tank comprises: a reaction zone and a clarification zone which are arranged and connected in sequence from front to back, wherein: The reaction zone is composed of a water inlet zone, a mixing zone, a main reaction zone and a diversion zone connected in sequence; wherein, The water inlet zone and the mixing zone are arranged on the side of the main reaction zone, and the guide zone is arranged behind the mixing zone and the main reaction zone; The clarification zone includes: an inlet pre-sedimentation zone, an inclined tube sedimentation zone, a clear water zone and a concentration zone; wherein, The inlet pre-settling area is connected to the guide area; The inclined tube sedimentation zone is arranged above the inlet pre-sedimentation zone; The clean water area is located above the inclined tube sedimentation area, and the clean water area is connected to the water outlet well arranged at the rear end through the water collecting trough; The concentration zone is arranged below the inlet pre-sedimentation zone and at the bottom of the clarification zone.

3. The combined equipment for efficient chemical phosphorus removal according to claim 2, characterized in that: The clarification zone also includes: a sludge scraper and a sludge screw pump; The scraper is arranged in the concentration area from top to bottom, and can scrape the sludge in the concentration area to the sludge tank; The sludge screw pump is arranged in the equipment room below the main reaction zone, the sludge inlet end of the sludge screw pump is connected to the concentration zone, one of the two sludge outlet ends of the sludge screw pump is connected back to the main reaction zone, and the other sludge outlet end is connected to an external sludge storage tank.

4. The combined equipment for efficient chemical phosphorus removal according to claim 2, characterized in that: The mixing zone is provided with a stirring device and a reagent adding device capable of adding a coagulant reagent.

5. The combined equipment for efficient chemical phosphorus removal according to any one of claims 1 to 4, characterized in that: The integrated microporous filter comprises: Steel structure tank body, water inlet cylinder, filter disc assembly, slag discharge assembly, backwash device, mud discharge pipe and water outlet pipe; among them, The water inlet cylinder is arranged on the steel structure pool body, and the water inlet cylinder is communicated with the steel structure pool body; The filter disc assembly is arranged in the steel structure pool body; The slag discharge assembly is arranged in the steel structure pool body, on the side of the filter disc assembly; The backwashing device is arranged on the steel structure tank body, and the high-pressure water head of the backwashing device is arranged in the steel structure tank body, and can wash the disc of the filter disc assembly; The mud discharge pipe is connected to the bottom of the steel structure tank body; The water outlet pipe is arranged at the rear end of the steel structure tank body.

6. The combined equipment for efficient chemical phosphorus removal according to claim 5, characterized in that: The filter disc assembly is a split structure, consisting of a base, a plurality of filter discs, a disc support frame and a drive device; The multiple discs are arranged on the frame in sequence and at intervals, the disc support frame is arranged on the base through a rotating shaft, and the driving device is transmission-connected with the rotating shaft and can drive the rotating shaft to drive the disc support frame with multiple filter discs inserted to rotate on the base.

7. The combined equipment for efficient chemical phosphorus removal according to claim 6, characterized in that: Each filter disc is installed on the disc support frame in a plug-in manner and can be replaced individually.

8. The combined equipment for efficient chemical phosphorus removal according to claim 6, characterized in that: Also includes: The water outlet weir is arranged at the rear end of the steel structure pool body and in front of the water outlet pipe.

9. The combined equipment for efficient chemical phosphorus removal according to claim 6, characterized in that: The slag discharge component adopts a V-shaped slag discharge groove.

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