Sewage treatment nitrification tank and application method thereof

Abstract

The invention relates to the technical field of sewage treatment, and provides a sewage treatment nitrification tank and an application method thereof.The sewage treatment nitrification tank comprises a sewage tank, aeration pipelines, a support, aeration discs, a net rack and a net cover, and the aeration pipelines are arranged in the sewage tank in a criss-cross structure; a plurality of brackets are arranged in the sewage pool and support the staggered parts of the aeration pipelines; the aeration disc is communicated with the staggered part of the aeration pipeline; a plurality of net racks and net covers are arranged and are supported by the bracket so as to cover the aeration pipeline and the aeration disc, and the net covers correspond to the aeration disc. In the nitrification tank structure, the bracket is arranged for supporting the net rack and the net cover, so that the aeration pipeline and the gap between the adjacent pipelines can be covered by the net rack, and the aeration disc can be covered by the net cover, so that a flat net surface is formed in the nitrification tank to play a role of an interception net; therefore, the filler cannot be in contact with the aeration disc, so that the problem of pipeline blockage is avoided; and a worker can conveniently carry out maintenance work.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment nitrification pool and an application method thereof. Background Art

[0002] In industrial wastewater treatment, nitrifying bacteria play an important role in the removal of ammonia nitrogen. At present, corresponding interception nets are usually set up in nitrifying bacteria treatment pools to intercept the fillers, thereby avoiding the problem of filler reduction during the wastewater treatment process, and also preventing the accumulation of fillers from causing blockage in the aeration pipeline.

[0003] The existing utility model patent with authorization announcement number CN216639091U discloses a sewage treatment device with a suspended filler interception structure, including a treatment tank and a microporous aerator, the microporous aerator is installed in the treatment tank, the treatment tank is provided with a water outlet, and the treatment tank is provided with an interception mechanism; the interception mechanism includes an L-shaped filter screen plate, an electric slide, a support rod and an L-shaped scraper, the L-shaped filter screen plate is installed in the treatment tank, the electric slide is installed in the treatment tank, a reinforcement is provided between the electric slide and the treatment tank, the support rod is installed on the electric slide, the L-shaped scraper is provided on the support rod, and the L-shaped scraper is provided with a cleaning brush.

[0004] As in the above technical solution, a filter screen is provided for intercepting the filler. However, the filler and the aeration mechanism are in the same treatment chamber, and the aeration mechanism is prone to be blocked by the filler. At the same time, the aeration mechanism needs to be provided with a number of aeration pipelines for connecting a plurality of aeration disks for aeration, which results in a complex internal structure and is inconvenient for maintenance. Moreover, after the filler and the sludge are mixed and deposited, it will be difficult to float, which affects the subsequent water treatment effect and is not easy to clean. Summary of the invention

[0005] In view of this, the present invention proposes a sewage treatment nitrification tank and an application method thereof, which can effectively prevent fillers from clogging aeration pipes, separate sludge and fillers, and facilitate subsequent cleaning, so as to solve the problems in existing nitrification treatment tanks that fillers are easily blocked in aeration pipes, and that the mixing of fillers and sludge affects subsequent water treatment and cleaning.

[0006] The technical solution of the present invention is achieved in this way:

[0007] In one aspect, the present invention provides a sewage treatment nitrification tank, comprising a sewage tank, an aeration pipeline, a support, an aeration plate, a grid and a grid cover, wherein:

[0008] The aeration pipelines are arranged in the sewage tank in a crisscross structure;

[0009] The brackets are arranged in a plurality in the sewage tank and support the intersections of the aeration pipes;

[0010] The aeration disc is connected to the intersection of the aeration pipeline;

[0011] A plurality of grid frames and grid covers are provided and supported by brackets to cover the aeration pipeline and the aeration disk, and the grid covers correspond to the aeration disk.

[0012] On the basis of the above technical solution, preferably, the bracket includes a bottom plate, a top plate, a connecting rod, a lower support and an upper support, wherein:

[0013] The bottom plate is connected to the bottom wall of the sewage tank;

[0014] The top plate is arranged on the upper side of the bottom plate, and the grid frame and the grid cover press the top plate;

[0015] One end of the connecting rod is connected to the top plate, and the other end is plugged into the bottom plate;

[0016] The lower support is arranged on the bottom plate and supports the aeration pipeline;

[0017] The upper support is arranged on the top plate and presses the aeration pipeline.

[0018] On the basis of the above technical solution, preferably, the grid and the grid cover are both frame structures, and an interception net is arranged inside;

[0019] The corners of the grid are provided with arc-shaped slots, and the aeration plates correspond to the arc-shaped slots of the four grids;

[0020] The net cover is arranged in the arc-shaped slot and abuts against the bracket.

[0021] On the basis of the above technical solution, preferably, it further includes an isolation net, and the bracket also includes a support rod, wherein:

[0022] A plurality of support rods are arranged on the top plate, the support rods are plugged into the grid, and at least one support rod passes through the grid;

[0023] The isolation net is arranged on the supporting rod.

[0024] On the basis of the above technical solution, preferably, it further includes a mesh cage, and the bracket further includes a support rod, wherein:

[0025] A plurality of support rods are arranged on the top plate, the support rods are plugged into the grid, and at least one support rod passes through the grid;

[0026] The mesh cage is slidably matched with the support rods penetrating the mesh frame, and the mesh cage is filled with suspended fillers.

[0027] On the basis of the above technical solution, preferably, the aeration pipeline includes a pipeline joint and a connecting pipe, wherein:

[0028] The pipe joint has a plurality of through openings, and the through openings are arranged as an expanded diameter structure to form an end face;

[0029] The connecting pipe is connected with the through port;

[0030] A cross notch is provided on the lower support, the cross notch has an arc-shaped cross section and abuts against the peripheral surface and end surface of the pipe joint.

[0031] On the basis of the above technical solution, preferably, a plug flow agitator is further included, and the pipeline joints include a plurality of four-way pipe joints, a plurality of five-way pipe joints and at least two right-angle joints, wherein,

[0032] The four-way pipe joint and the five-way pipe joint are connected to the connecting pipe and the aeration plate, and the right-angle joint is connected to the connecting pipe;

[0033] The brackets corresponding to the two right-angle joints are used to support and fix the plug flow agitator, and the plug flow agitator is fixedly connected to the inner wall of the sewage tank.

[0034] On the basis of the above technical solution, preferably, the plug flow agitator comprises a support plate, a carrier, a side rod, a sliding seat and an agitator body, wherein:

[0035] The support plate corresponds to the right-angle joint and abuts against the top plate;

[0036] The carrier is arranged on the support plate;

[0037] One end of the side rod is connected to the carrier, and the other end is connected to the inner wall of the sewage tank;

[0038] The sliding seat is slidably connected to the carrier;

[0039] The stirrer body is arranged on the sliding seat.

[0040] On the basis of the above technical solution, preferably, it also includes a dosing pipeline, an activation preparation tank and a circulation pipeline, wherein:

[0041] The dosing pipeline is detachably connected to the plurality of mesh frames, and the dosing pipeline has a spray nozzle extending toward the mesh cover;

[0042] The water outlet of the activation and mixing tank is connected to the sewage pool;

[0043] One end of the circulation pipeline is connected to the sewage pool, and the other end is connected to the activation and mixing tank.

[0044] In another aspect, the present invention provides a method for using the above-mentioned sewage treatment nitrification tank, comprising the following steps:

[0045] S1. Input sewage into the sewage pool and fill it with suspended fillers to provide carriers for nitrifying bacteria;

[0046] S2, providing dissolved oxygen to the sewage tank through aeration pipes and aeration plates;

[0047] S3, driving the water circulation through the plug flow agitator;

[0048] S4. When the nitrifying bacteria are impacted and the ammonia nitrogen removal efficiency decreases, stop the input of sewage into the sewage pool and close the aeration pipeline to allow the sewage to settle for 30 to 60 minutes;

[0049] S5. The muddy water at the bottom of the sewage pool is transported to the activation and blending tank through the circulation pipeline. The capacity of the activation and blending tank is set to 25% to 35% of the capacity of the sewage pool;

[0050] S6, add concentration of 50-100g / m 3 The nutrient ammonium sulfate, the concentration is 30-50g / m 3 Ferrous sulfate, concentration is 200-500g / m 3 Potassium hydrogen phosphate, concentration is 30-50g / m 3 Magnesium sulfate, concentration is 500-1000g / m 3 Calcium chloride, and sodium carbonate are added to adjust the pH value to 7.8-8.2, the temperature is maintained at 30-32°C, the dissolved oxygen is maintained at 2-4 mg, and stirred for 12-36 hours to form a strengthening bacterial agent;

[0051] S7, adding the prepared strengthening bacteria agent into the nitrification sewage pool, monitoring the pH value of the sewage pool during the process, maintaining the pH value at 7.8-8.2, and adding sodium carbonate to adjust the pH value when it is low;

[0052] S8. Continue to test the ammonia nitrogen content in the sewage pool until it drops below 5 mg / L.

[0053] The sewage treatment nitrification tank and its application method of the present invention have the following beneficial effects compared with the prior art:

[0054] (1) In the structure of the nitrification tank, a bracket is provided for supporting the grid and the grid cover, so that the grid can cover the aeration pipeline and the gaps between adjacent pipelines, and the grid cover can cover the aeration plate, so that the nitrification tank has a flat grid surface, which acts as an interception net, so that the filler cannot contact the aeration plate, thereby avoiding the problem of pipeline blockage; at the same time, it can be used to support personnel, making it convenient for staff to carry out maintenance work;

[0055] (2) When the sludge is deposited, it will be deposited on the lower side of the grid and will not be mixed with the filler. This can avoid the problem of the filler being unable to float later, thereby ensuring that the nitrifying bacteria in the filler can continuously treat the sewage to improve the water treatment effect;

[0056] (3) The grid and the net cover are both set as a frame structure with a built-in interception net, and an arc-shaped notch is opened on the grid. After the components are installed, the grid and the net cover are supported by the bracket, and the net cover is positioned, installed and limited by the grid. This assembly structure does not require fasteners to connect the components, has the advantage of convenient disassembly and assembly, and is convenient for subsequent maintenance of the aeration pipeline and the aeration disk, and also convenient for cleaning the bottom of the pool;

[0057] (4) In the support structure, it is connected to the bottom of the sewage pool through the bottom plate, and the aeration pipeline is supported by the lower support. After the top plate is installed, the grid and the net cover can be supported, and simultaneously pressed on the aeration pipeline through the upper support. In this way, the weight of the grid and the net cover can be relied on to ensure the stability of the structure of the support itself, and at the same time ensure the stability of the structure of the aeration pipeline and the aeration plate;

[0058] (5) By arranging support rods in the support structure, the grid can be limited to facilitate the assembly of multiple grids; at the same time, the support rods can also be used to install isolation nets or cages to accommodate fillers, so that the fillers are gathered, thereby facilitating the subsequent processing of the fillers;

[0059] (6) By setting up a plug flow agitator, the sewage mixing treatment effect can be further improved. At the same time, in the plug flow agitator structure, a support plate is used to support the top plate of the corresponding right-angle joint, so that the plug flow agitator can be installed stably. The right-angle joint here does not need to be equipped with an aeration plate, and there will be no interference problem. This structure fully utilizes the function of the bracket, has a reasonable layout and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 A three-dimensional diagram of a sewage treatment nitrification tank according to the present invention;

[0062] Figure 2 It is a stereoscopic diagram of the grid, aeration plate and plug flow agitator of the sewage treatment nitrification tank of the present invention;

[0063] Figure 3 It is a grid layout structure diagram of the sewage treatment nitrification tank of the present invention;

[0064] Figure 4 It is a side view of the grid, aeration plate and plug flow agitator of the sewage treatment nitrification tank of the present invention;

[0065] Figure 5 For the present invention Figure 4 A magnified view of the structure at point A;

[0066] Figure 6 A three-dimensional diagram of an installation isolation net for a sewage treatment nitrification tank of the present invention;

[0067] Figure 7 An exploded view of the installation of an isolation net for a sewage treatment nitrification tank of the present invention;

[0068] Figure 8 The sewage treatment nitrification tank of the present invention Figure 7 A magnified view of the structure at point B;

[0069] Fig. 9 A three-dimensional diagram of a mesh cage installed in a sewage treatment nitrification tank of the present invention;

[0070] Fig.10 This is a structural diagram of the lower support of the sewage treatment nitrification tank of the present invention;

[0071] Fig.11 This is a structural diagram of the aeration pipeline layout of the sewage treatment nitrification tank of the present invention;

[0072] Fig.12 For the present invention Fig.11 A magnified view of the structure at point C in the middle;

[0073] Fig.13 It is a system diagram of the sewage treatment nitrification tank of the present invention;

[0074] In the figure: 1. sewage tank; 2. aeration pipeline; 21. pipeline joint; 211. four-way pipe joint; 212. five-way pipe joint; 213. right-angle joint; 22. connecting pipe; 201. through port; 202. end face; 3. bracket; 31. bottom plate; 32. top plate; 33. connecting rod; 34. lower support; 3401. cross notch; 35. upper support; 36. support rod; 4. aeration plate; 5. grid; 501. arc notch; 6. net cover; 7. isolation net; 8. net cage; 9. plug flow agitator; 91. support plate; 92. carrier; 93. side rod; 94. sliding seat; 95. agitator body; 10. dosing pipeline; 1011. spray nozzle; 11. activation and preparation tank; 12. circulation pipeline. DETAILED DESCRIPTION

[0075] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0076] like Figures 1 to 13 As shown, the sewage treatment nitrification tank of the present invention includes a sewage tank 1, an aeration pipeline 2, a bracket 3, an aeration plate 4, a grid 5, a mesh cover 6, an isolation net 7, a mesh cage 8, a plug flow agitator 9, a dosing pipeline 10, an activation mixing tank 11 and a circulation pipeline 12.

[0077] like Figure 1 to Figure 4 As shown, the aeration pipeline 2 is arranged in a crisscross structure in the sewage pool 1; a plurality of brackets 3 are arranged in the sewage pool 1, and support the intersections of the aeration pipeline 2; the aeration plate 4 is connected to the intersections of the aeration pipeline 2;

[0078] As described above, in the nitrification tank structure, the sewage tank 1 is used to contain sewage, the aeration pipeline 2 is introduced into the sewage tank 1 from the outside, the outer end is connected to the aeration fan, and the inner side is aerated through the aeration plate 4 to provide dissolved oxygen to promote biological treatment;

[0079] Specifically, a water outlet weir is provided on the sewage pool 1 to allow the clear water to flow out.

[0080] The aeration disc 4 is arranged at the intersection of the aeration pipeline 2 , and the bracket 3 is arranged accordingly, so as to support the aeration pipeline 2 .

[0081] Specifically, the sewage pool 1 is provided with a drain valve, and the setting height of the drain valve is lower than the height of the grid 5, so as to facilitate the discharge of the bottom sludge.

[0082] like Figure 1 to Figure 4 As shown, a plurality of mesh frames 5 and mesh covers 6 are provided and supported by the bracket 3 to cover the aeration pipeline 2 and the aeration plate 4, and the mesh covers 6 correspond to the aeration plate 4;

[0083] As in the above structure, when sewage treatment is carried out, fillers are applied in the sewage pool 1 as nitrifying bacteria carriers, wherein the grid frame 5 and the mesh cover 6 are set, the grid frame 5 is used to cover the rectangular space formed by the aeration pipeline 2, and the aeration pipeline 2 at the same time, and the mesh cover 6 is used to cover the aeration plate 4, so as to form a mesh plane in the sewage pool 1, which plays the role of an interception net, thereby isolating the fillers; at the same time, it can be used to support personnel, which is convenient for the staff to carry out maintenance work;

[0084] In this way, when water treatment is carried out, in the sedimentation stage, the filler will not follow the sludge to sink to the lower side of the grid 5, and then when aeration is performed through the aeration plate 4, the filler can be lifted up by aeration to achieve the effect of mixing the filler with the sewage, thereby achieving full treatment of the sewage;

[0085] At the same time, this structure is provided with a plurality of grids 5 and a plurality of mesh covers 6. When maintenance is required, only the mesh covers 6 need to be removed to clean, maintain and replace the corresponding aeration discs 4. After removing the grids 5, the aeration pipelines 2 can be maintained.

[0086] like Figure 5 , Figure 7 , Figure 8 and Fig.10 As shown, the bracket 3 includes a bottom plate 31, a top plate 32, a connecting rod 33, a lower support 34 and an upper support 35, wherein the bottom plate 31 is connected to the bottom wall of the sewage pool 1; the top plate 32 is arranged on the upper side of the bottom plate 31, and the grid 5 and the net cover 6 press the top plate 32; one end of the connecting rod 33 is connected to the top plate 32, and the other end is plugged into the bottom plate 31; the lower support 34 is arranged on the bottom plate 31 and supports the aeration pipeline 2; the upper support 35 is arranged on the top plate 32 and presses the aeration pipeline 2;

[0087] As in the above structure, the bracket 3 is used to support the aeration pipeline 2 and the grid 5. When it is used, the bottom plate 31 is connected to the bottom wall of the sewage pool 1, and the aeration pipeline 2 is overlapped on the lower support 34. Then the top plate 32 is installed. The top plate 32 is plugged and positioned with the bottom plate 31 through the connecting rod 33, and the upper side of the aeration pipeline 2 is pressed by the lower support 34 to fix the aeration pipeline 2 in cooperation with the lower support 34.

[0088] Afterwards, the grid frame 5 is installed to press the top plate 32, and then the mesh cover 6 is arranged corresponding to the top plate 32 to protect the aeration disk 4; specifically, the top plate 32 is arranged in an annular structure to leave an aeration space corresponding to the aeration disk 4 and the mesh cover 6;

[0089] In specific applications, a guide rod can be set on the bottom wall of the sewage pool 1, and a hole can be opened on the bottom plate 31, and the bottom plate 31 can be placed on the guide rod for positioning;

[0090] After the grid frame 5 and the grid cover 6 are installed, the top plate 32 is supported by its own weight to ensure the stability of the overall structure; it does not require fasteners for auxiliary fixation, has the advantage of convenient grouping, can reduce application costs, and improve the convenience of maintenance.

[0091] like Figure 2 and Figure 3 As shown, the grid 5 and the net cover 6 are both frame structures, and an interception net is arranged inside; arc-shaped notches 501 are arranged at the corners of the grid 5, and the aeration plates 4 correspond to the four arc-shaped notches 501 of the grid 5; the net cover 6 is arranged in the arc-shaped notches 501 and abuts against the bracket 3;

[0092] As in the above structure, the grid 5 and the grid cover 6 are both configured as a frame structure, an interception net is provided inside to intercept fillers, and the edge frame is used to abut against the top plate 32 of the bracket 3, thereby achieving stable support;

[0093] For the grid 5 at the edge of the sewage pool 1, a support rod can be provided to cooperate with the bracket 3 to form a stable support for the grid 5;

[0094] Specifically, arc-shaped notches 501 are provided at the corners of the grid 5, so that after four grids 5 are spliced ​​together, circular notches can be formed for installing the grid cover 6, which is convenient for positioning the grid cover 6 and has the advantage of convenient grouping.

[0095] like Figure 6 to Figure 8 As shown, the support 3 further includes a support rod 36, wherein a plurality of support rods 36 are arranged on the top plate 32, the support rods 36 are plugged into the grid 5, and at least one support rod 36 passes through the grid 5; the isolation net 7 is arranged on the support rod 36;

[0096] As in the above structure, a plurality of support rods 36 are provided on the bracket 3. According to the layout of the grid frame 5, four support rods 36 are provided. Thus, when the grid frame 5 is installed, the support rods 36 can be used to limit the position and realize the positioning of the grid frame 5. Thus, after the bottom plate 31 of the bracket 3 is relatively positioned with the bottom wall of the sewage pool 1, the grid frame 5 can be quickly arranged and installed by relying on the support rods 36, thereby facilitating the subsequent installation of the net cover 6. The convenience of assembly is ensured through the layer-by-layer positioning structure.

[0097] Furthermore, in this structure, the filler is intercepted by the isolation net 7, so that the filler cannot contact the grid 5 and the net cover 6, which can further prevent the problem of pipeline blockage;

[0098] Specifically, when installing the isolation net 7, the isolation net 7 can be supported by the support rod 36, thereby meeting the needs of rapid disassembly and cleaning;

[0099] Furthermore, a sleeve may be installed at the bottom of the isolation net 7 to sleeve the support rod 36, so as to further ensure the stability of the installation of the isolation net 7;

[0100] In some applications, since the isolation net 7 can serve to intercept the filler, an interception net may not be provided inside the grid 5 .

[0101] In some embodiments, Figure 8 and Fig. 9 As shown, the mesh cage 8 is slidably matched with the support rod 36 that penetrates the mesh frame 5, and the mesh cage 8 is filled with suspended filler;

[0102] In this structure, the isolation net 7 is replaced by the mesh cage 8; in specific applications, the filler can be placed in the mesh cage 8, which can avoid excessive diffusion of the filler. Since the filler is gathered, it will not be lost, which can reduce the cost of sewage treatment. At the same time, it can also be conveniently taken out for activation treatment in subsequent applications;

[0103] Specifically, the mesh cage 8 is configured as a long cage-shaped structure, and slide tubes are provided at both ends thereof to slidably connect the support rods 36; at the same time, the mesh cage 8 descends to hold the mesh frame 5, which can further ensure the stability of the overall structure.

[0104] In some embodiments, a pipe is connected to the upper side and the lower side of the mesh cage 8, and the pipe is connected to the activation device through a circulation pump, so that the sewage in the sewage pool 1 can be pumped out under the action of the circulation pump, thereby driving the filler in the mesh cage 8 to flow out, and when the activation is completed, the filler is transported back to the mesh cage 8;

[0105] Specifically, a valve is provided at the connection between the pipeline and the mesh cage 8. When the filler is returned, the valve of the output pipe is closed, so that the returned liquid seeps out of the mesh cage 8, while the filler can remain in the mesh cage 8, thereby improving the convenience of filler activation.

[0106] like Fig.11 and Fig.12 As shown, the aeration pipeline 2 includes a pipeline joint 21 and a connecting pipe 22, wherein the pipeline joint 21 has a plurality of through openings 201, and the through openings 201 are configured as an expanded diameter structure to form an end surface 202; the connecting pipe 22 is connected to the through openings 201; a cross notch 3401 is provided on the lower support 34, and the cross notch 3401 has an arc-shaped cross section and abuts against the peripheral surface and the end surface 202 of the pipeline joint 21;

[0107] As in the above structure, the aeration pipeline 2 is connected by a plurality of pipeline joints 21 and a plurality of connecting pipes 22 to form a crisscross network structure;

[0108] The through opening 201 of the pipe joint 21 is configured as an expanded diameter structure, so that the pipe joint 21 forms a stepped pipe structure;

[0109] In the structure of the bracket 3, a cross slot 3401 is provided on the lower support 34 of the bracket 3, so as to facilitate supporting the pipe connector 21. At the same time, the lower support 34 also abuts against the end face 202 of the pipe connector 21 to position the aeration pipeline 2 and ensure the overall stability of the aeration pipeline 2.

[0110] like Figure 6 , Fig.11 and Fig.12 As shown, the pipe joint 21 includes a plurality of four-way pipe joints 211, a plurality of five-way pipe joints 212 and at least two right-angle joints 213, wherein the four-way pipe joint 211 and the five-way pipe joint 212 are connected to the connecting pipe 22 and the aeration plate 4, and the right-angle joint 213 is connected to the connecting pipe 22; the brackets 3 corresponding to the two right-angle joints 213 are used to support and fix the plug flow agitator 9, and the plug flow agitator 9 is fixedly connected to the inner wall of the sewage tank 1;

[0111] As in the above structure, the pipe joint 21 uses a variety of joints. According to the criss-cross mesh structure, it uses a four-way pipe joint 211, a five-way pipe joint 212 and a right-angle joint 213, wherein both ends of the right-angle joint 213 are connected to the connecting pipe 22 and are applied to the corners of the entire aeration pipeline 2 system. The four-way pipe joint 211 and the five-way pipe joint 212 each have one port connected to the aeration disk 4, and the remaining ports are connected to the connecting pipe 22;

[0112] Regarding the structural layout of the aeration plate 4 and the mesh cover 6, only the four-way pipe joint 211 and the five-way pipe joint 212 are set, and the two right-angle joints 213 are not set. The aeration plate 4 is not set, so there is no need to set the mesh cover 6, but the surrounding grid 5 will still form a circular notch and expose the corresponding bracket 3. For this position, it is used to position the plug-flow agitator 9, and then the plug-flow agitator 9 is fixed to the inside of the sewage tank 1 to achieve an overall connection.

[0113] like Figure 2 As shown, the plug flow agitator 9 includes a support plate 91, a carrier 92, a side rod 93, a sliding seat 94 and an agitator body 95, wherein the support plate 91 corresponds to the right-angle joint 213 and abuts against the top plate 32; the carrier 92 is arranged on the support plate 91; one end of the side rod 93 is connected to the carrier 92, and the other end is connected to the inner wall of the sewage tank 1; the sliding seat 94 is slidably connected to the carrier 92; and the agitator body 95 is arranged on the sliding seat 94;

[0114] As in the above structure, the flow-pushing agitator 9 is used to drive the sewage in the sewage pool 1 to circulate and mix, thereby improving the water treatment effect;

[0115] During assembly, the support plate 91 is used to abut against the top plate 32 of the corresponding right-angle joint 213, thereby realizing the overall support of the plug-flow agitator 9, and then connected to the inner wall of the sewage tank 1 through the side rod 93, that is, the plug-flow agitator 9 is installed and fixed;

[0116] In this structure, the agitator body 95 is slidably connected to the carrier 92 on the support plate 91 through a sliding seat 94, so that the position of the agitator body 95 can be easily adjusted so that the sewage can be fully mixed; this structure fully combines the structural layout of the bracket 3 and the grid 5, and after fixed connection, the overall strength is improved.

[0117] like Figure 2 , Figure 4 , Figure 7 and Fig.13As shown, the dosing pipeline 10 is detachably connected to the plurality of grids 5, and the dosing pipeline 10 has a spray nozzle 1011 extending toward the mesh cover 6; the water outlet of the activation and preparation tank 11 is connected to the sewage pool 1; one end of the circulation pipeline 12 is connected to the sewage pool 1, and the other end is connected to the activation and preparation tank 11;

[0118] As in the above structure, when treating sewage, several reagents are usually added to react and treat the sewage, or strengthening bacteria are added to promote the growth of microorganisms. For this purpose, a dosing pipeline 10 is provided;

[0119] When used, the dosing pipeline 10 is installed on the grid 5, and the two are fixed by bolts, so that multiple grids 5 can be integrated to ensure the stability of relative positions;

[0120] Among them, the dosing pipeline 10 is provided with a water inlet, and a plurality of spray nozzles 1011 are provided on the side, and the spray nozzles 1011 correspond to the mesh cover 6, so that when the aeration plate 4 is aerated, the sewage and the agent can be mixed simultaneously, which makes full use of the aeration function of the aeration plate 4, is conducive to improving the sewage treatment effect, and saving energy and reducing emissions;

[0121] Among them, the activation and mixing tank 11 is used to mix nutrient solution to activate the carrier and promote the growth of nitrifying bacteria, thereby ensuring the water treatment effect; the circulation pipeline 12 is composed of a pipeline and a circulation pump, which is used for the circulation of sewage between the sewage pool 1 and the activation and mixing tank 11.

[0122] The method for treating a nitrification tank for sewage of the present invention comprises the following steps:

[0123] S1, inputting sewage into sewage pool 1, and filling with suspended filler to provide carrier for nitrifying bacteria;

[0124] S2, providing dissolved oxygen into the sewage pool 1 through the aeration pipeline 2 and the aeration plate 4;

[0125] S3, driving the water body to circulate through the plug flow agitator 9;

[0126] S4. When the nitrifying bacteria are impacted and the ammonia nitrogen removal efficiency decreases, stop inputting sewage into the sewage pool 1, and close the aeration pipeline 2 to allow the sewage to settle for 30 to 60 minutes;

[0127] S5. The muddy water at the bottom of the sewage pool 1 is transported to the activation and blending tank 11 through the circulation pipeline 12. The capacity of the activation and blending tank 11 is set to 25% to 35% of the capacity of the sewage pool 1.

[0128] S6, add 50-100g / m 3 The nutrient ammonium sulfate, the concentration is 30-50g / m3 Ferrous sulfate, concentration is 200-500g / m 3 Potassium hydrogen phosphate, concentration is 30-50g / m 3 Magnesium sulfate, concentration is 500-1000g / m 3 Calcium chloride, and sodium carbonate are added to adjust the pH value to 7.8-8.2, the temperature is maintained at 30-32°C, the dissolved oxygen is maintained at 2-4 mg, and stirred for 12-36 hours to form a strengthening bacterial agent;

[0129] S7, adding the prepared strengthening bacterial agent into the nitrification sewage pool 1, monitoring the pH value of the sewage in the sewage pool 1 during the process, maintaining the pH value at 7.8-8.2, and adding sodium carbonate to adjust the pH value when it is low;

[0130] S8. Continue to detect the ammonia nitrogen content of the sewage in the sewage pool 1 until the ammonia nitrogen content drops below 5 mg / L.

[0131] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment nitrification tank, characterized in that: It comprises a sewage pool (1), an aeration pipeline (2), a bracket (3), an aeration plate (4), a grid frame (5) and a grid cover (6), wherein: The aeration pipeline (2) is arranged in the sewage pool (1) in a crisscross structure; A plurality of the brackets (3) are arranged in the sewage pool (1) and support the intersections of the aeration pipelines (2); The aeration plate (4) is connected to the intersection of the aeration pipeline (2); The mesh frame (5) and the mesh cover (6) are provided in plurality and supported by the bracket (3) to cover the aeration pipeline (2) and the aeration plate (4), and the mesh cover (6) corresponds to the aeration plate (4).

2. The sewage treatment nitrification tank according to claim 1, characterized in that: The support (3) comprises a bottom plate (31), a top plate (32), a connecting rod (33), a lower support (34) and an upper support (35), wherein: The bottom plate (31) is connected to the bottom wall of the sewage tank (1); The top plate (32) is arranged on the upper side of the bottom plate (31), and the mesh frame (5) and the mesh cover (6) press the top plate (32); One end of the connecting rod (33) is connected to the top plate (32), and the other end is plugged into the bottom plate (31); The lower support (34) is arranged on the bottom plate (31) and supports the aeration pipeline (2); The upper support (35) is arranged on the top plate (32) and presses the aeration pipeline (2).

3. The sewage treatment nitrification tank according to claim 2, characterized in that: The grid frame (5) and the grid cover (6) are both frame structures, and an interception net is arranged inside; The corners of the grid (5) are provided with arc-shaped notches (501), and the aeration plates (4) correspond to the four arc-shaped notches (501) of the grid (5); The mesh cover (6) is arranged in the arc-shaped notch (501) and abuts against the bracket (3).

4. The sewage treatment nitrification tank according to claim 3, characterized in that: It also includes an isolation net (7), and the support (3) also includes a support rod (36), wherein: A plurality of support rods (36) are arranged on the top plate (32), the support rods (36) are plugged into the grid (5), and at least one support rod (36) passes through the grid (5); The isolation net (7) is arranged on the support rod (36).

5. The sewage treatment nitrification tank according to claim 3, characterized in that: It also includes a mesh cage (8), and the support (3) also includes a support rod (36), wherein: A plurality of support rods (36) are arranged on the top plate (32), the support rods (36) are plugged into the grid (5), and at least one support rod (36) passes through the grid (5); The mesh cage (8) is slidably matched with the support rod (36) that passes through the mesh frame (5), and the mesh cage (8) is filled with suspended filler.

6. The sewage treatment nitrification tank according to claim 2, characterized in that: The aeration pipeline (2) comprises a pipeline joint (21) and a connecting pipe (22), wherein: The pipe joint (21) has a plurality of through openings (201), and the through openings (201) are configured as a diameter-expanding structure to form an end surface (202); The connecting pipe (22) is in communication with the through port (201); The lower support (34) is provided with a cross notch (3401), the cross notch (3401) has an arc-shaped cross section and abuts against the peripheral surface of the pipe joint (21) and the end surface (202).

7. The sewage treatment nitrification tank according to claim 6, characterized in that: It also includes a plug flow agitator (9), the pipeline joint (21) includes a plurality of four-way pipe joints (211), a plurality of five-way pipe joints (212) and at least two right-angle joints (213), wherein: The four-way pipe joint (211) and the five-way pipe joint (212) are connected to the connecting pipe (22) and the aeration plate (4), and the right-angle joint (213) is connected to the connecting pipe (22); The brackets (3) corresponding to the two right-angle joints (213) are used to support and fix the plug-flow agitator (9), and the plug-flow agitator (9) is fixedly connected to the inner wall of the sewage tank (1).

8. The sewage treatment nitrification tank according to claim 7, characterized in that: The plug flow agitator (9) comprises a support plate (91), a carrier (92), a side rod (93), a sliding seat (94) and an agitator body (95), wherein: The support plate (91) corresponds to the right-angle joint (213) and abuts against the top plate (32); The carrier (92) is arranged on the support plate (91); One end of the side rod (93) is connected to the carrier (92), and the other end is connected to the inner wall of the sewage tank (1); The sliding seat (94) is slidably connected to the carrier (92); The agitator body (95) is arranged on the sliding seat (94).

9. The sewage treatment nitrification tank according to claim 8, characterized in that: It also includes a dosing pipeline (10), an activation preparation tank (11) and a circulation pipeline (12), wherein: The dosing pipeline (10) is detachably connected to the plurality of grid frames (5), and the dosing pipeline (10) has a spray nozzle (1011) extending toward the grid cover (6); The water outlet of the activation and preparation tank (11) is connected to the sewage pool (1); One end of the circulation pipeline (12) is connected to the sewage pool (1), and the other end is connected to the activation and preparation tank (11).

10. A method for using the sewage treatment nitrification tank according to claim 9, characterized in that: The following steps are involved: S1, inputting sewage into the sewage pool (1), and filling it with suspended fillers to provide carriers for nitrifying bacteria; S2, providing dissolved oxygen into the sewage pool (1) through the aeration pipeline (2) and the aeration plate (4); S3, driving the water body to circulate through the plug flow agitator (9); S4. When the nitrifying bacteria are impacted and the ammonia nitrogen removal efficiency decreases, the input of sewage into the sewage pool (1) is stopped, and the aeration pipeline (2) is closed to allow the sewage to settle statically for 30 to 60 minutes; S5, conveying the muddy water at the bottom of the sewage pool (1) to the activation and blending tank (11) through the circulation pipeline (12), wherein the capacity of the activation and blending tank (11) is set to 25% to 35% of the capacity of the sewage pool (1); S6, adding a concentration of 50-100 g / m 3 The nutrient ammonium sulfate, the concentration is 30-50g / m 3 Ferrous sulfate, concentration is 200-500g / m 3 Potassium hydrogen phosphate, concentration is 30-50g / m 3 Magnesium sulfate, concentration is 500-1000g / m 3 Calcium chloride, and sodium carbonate are added to adjust the pH value to 7.8-8.2, the temperature is maintained at 30-32°C, the dissolved oxygen is maintained at 2-4 mg, and stirred for 12-36 hours to form a strengthening bacterial agent; S7, adding the prepared strengthening bacterial agent to the nitrification sewage pool (1), monitoring the pH value of the sewage pool (1) during the process, maintaining the pH value at 7.8-8.2, and adding sodium carbonate to adjust the pH value when it is low; S8. Continue to detect the ammonia nitrogen content of the sewage in the sewage pool (1) until the ammonia nitrogen content drops below 5 mg / L.

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