A device for treating sludge digestion liquid by using anaerobic ammonium oxidation

Abstract

The present invention discloses a device for treating sludge digestion liquid by using anaerobic ammonium oxidation, and belongs to the technical field of sludge digestion liquid treatment. It includes a first anaerobic ammonium oxidation reactor, a second anaerobic ammonium oxidation reactor, a first cyclone and a second cyclone; the first liquid outlet of the second anaerobic ammonium oxidation reactor is connected to the first liquid inlet of the first cyclone; the first liquid outlet of the first cyclone is connected to the first liquid inlet of the second anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the first liquid inlet of the first anaerobic ammonium oxidation reactor; the first liquid outlet of the first anaerobic ammonium oxidation reactor is connected to the liquid inlet of the second cyclone; the first liquid outlet of the second cyclone is connected to the second liquid inlet or the first liquid inlet of the first anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the liquid inlet of the first cyclone. The present invention can solve the technical problem of sludge loss existing in the anaerobic ammonium oxidation reactor in the related art.

Description

Technical Field

[0001] The invention relates to the technical field of sludge digestion liquid treatment, and in particular to a device for treating sludge digestion liquid by utilizing anaerobic ammonia oxidation. Background Art

[0002] During the operation of the anaerobic ammonium oxidation reactor, sludge floating is prone to occur. The floating sludge will cause the system to operate unstably. In more serious cases, it will cause the system to fail to operate.

[0003] Therefore, providing a stable operating device for treating sludge digestion liquid using anaerobic ammonium oxidation is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The invention discloses a device for treating sludge digestion liquid by using anaerobic ammonium oxidation, so as to solve the technical problem of unstable operation of anaerobic ammonium oxidation reactor in the related art.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A device for treating sludge digestion liquid by anaerobic ammonium oxidation, comprising a first anaerobic ammonium oxidation reactor, a second anaerobic ammonium oxidation reactor, a first cyclone and a second cyclone;

[0007] The first liquid outlet of the second anaerobic ammonium oxidation reactor is connected to the first liquid inlet of the first cyclone; the first liquid outlet of the first cyclone is connected to the first liquid inlet of the second anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the first liquid inlet of the first anaerobic ammonium oxidation reactor;

[0008] The first liquid outlet of the first anaerobic ammonium oxidation reactor is connected to the liquid inlet of the second cyclone; the first liquid outlet of the second cyclone is connected to the second liquid inlet or the first liquid inlet of the first anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the liquid inlet of the first cyclone;

[0009] Among them, the effective volume and treatment load of the first anaerobic ammonium oxidation reactor are greater than the effective volume and treatment load of the second anaerobic ammonium oxidation reactor.

[0010] In some plans, gas tanks are also included;

[0011] The gas outlet of the first anaerobic ammonium oxidation reactor and / or the gas outlet of the second anaerobic ammonium oxidation reactor are connected to the gas inlet of the gas tank, and the gas outlet of the gas tank is connected to the gas inlet of the second anaerobic ammonium oxidation reactor;

[0012] Wherein, the air inlet of the second anaerobic ammonium oxidation reactor is located below the air outlet of the second anaerobic ammonium oxidation reactor.

[0013] In some embodiments, a third cyclone is further included;

[0014] The first liquid outlet of the third cyclone is connected to the second liquid inlet of the second anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the liquid inlet of the treatment tank;

[0015] The liquid inlet of the third cyclone is used to connect to the liquid outlet of the treatment tank.

[0016] In some embodiments, a throat is provided in the first anaerobic ammonium oxidation reactor;

[0017] The throat is provided with a first channel with both ends penetrating the throat along the axial direction of the first anaerobic ammonium oxidation reactor, and the cross-sectional area at the inlet of the first channel is larger than the cross-sectional area at the outlet; the throat is also provided with a plurality of first through holes in communication with the first channel in the circumferential direction;

[0018] Wherein, the first liquid inlet or the second liquid inlet of the first anaerobic ammonium oxidation reactor is located below the throat.

[0019] In some embodiments, the throat includes a constant cross-section section and a converging section;

[0020] The inner diameter of the contraction section gradually decreases from the bottom to the top, and the top opening is connected to the equal cross-section section;

[0021] The inner diameter of the uniform cross-section section is the same as the inner diameter of the top opening of the contraction section;

[0022] A plurality of first through holes are arranged on the contraction section along the circumferential direction of the contraction section.

[0023] In some embodiments, a partition plate and a shield are provided in the second anaerobic ammonium oxidation reactor;

[0024] A sinking compartment is formed between the partition plate and the inner wall of the second anaerobic ammonium oxidation reactor. The first liquid inlet of the second anaerobic ammonium oxidation reactor is located above the sinking compartment, and the shielding member is located below the sinking compartment.

[0025] In some solutions, the shielding member has a guide portion on one side facing the sinking compartment, and the guide portion is inclined downward.

[0026] In some embodiments, the second anaerobic ammonium oxidation reactor is further provided with a gas distribution plate;

[0027] The gas distribution plate is provided with a second channel and a plurality of third channels, both ends of which respectively penetrate the gas distribution plate, along the axial direction of the second anaerobic ammonia oxidation reactor. The diameter of the second channel gradually decreases from the bottom to the top, and the plurality of third channels are arranged along the circumferential direction of the gas distribution plate.

[0028] The gas distribution plate also has a gas distribution chamber and a plurality of second through holes. The air inlet of the second anaerobic ammonium oxidation reactor is connected to the gas distribution chamber. The gas distribution chamber is connected to the second channel and / or the inner cavity of the second anaerobic ammonium oxidation reactor through the plurality of second through holes.

[0029] In some embodiments, a water distributor is provided in each of the first anaerobic ammonium oxidation reactor and the second anaerobic ammonium oxidation reactor, and the water distributor is disposed close to the inner bottom of the first anaerobic ammonium oxidation reactor and the second anaerobic ammonium oxidation reactor, respectively;

[0030] One of the water distributors is connected to the first liquid outlet of the treatment tank through the third liquid inlet of the first anaerobic ammonium oxidation reactor, and the other water distributor is connected to the first liquid outlet of the third cyclone through the second liquid inlet of the second anaerobic ammonium oxidation reactor;

[0031] Among them, a plurality of inclined water outlet holes are arranged at the bottom of the water distributor.

[0032] In some embodiments, the second anaerobic ammonium oxidation reactor is externally jacketed with an insulation container.

[0033] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0034] Two streams of liquid with different flow rates, one group of liquid with a larger flow rate enters the first anaerobic ammonium oxidation reactor, and the other group of liquid with a smaller flow rate enters the second anaerobic ammonium oxidation reactor. The first anaerobic ammonium oxidation reactor and the second anaerobic ammonium oxidation reactor reproduce anaerobic ammonium oxidizing bacteria and other substances to form a self-agglomerate (sludge). The effective volume and processing load of the second anaerobic ammonium oxidation reactor are smaller, and the flow rate introduced is also smaller. Various parameters during the reaction, such as temperature, flow rate, and pH value, are easy to adjust, which can create an environment more suitable for anaerobic ammonium oxidation to accelerate the formation of large-particle anaerobic ammonium oxidizing bacteria; after a period of time, the liquid reacted in the first anaerobic ammonium oxidation reactor enters the first cyclone, and the first cyclone separates large-particle sludge and small-particle sludge within a specific range, and sends the small-particle sludge to the second anaerobic ammonium oxidation reactor for continued cultivation, and sends the large-particle sludge to the first anaerobic ammonium oxidation reactor to better in the first anaerobic ammonium oxidation reactor. It is more effective to make the anaerobic ammonium oxidation bacteria quickly enriched and improve the denitrification rate. The larger particles can also improve the floating of sludge in the first anaerobic ammonium oxidation reactor to stabilize the system operation production process. During the reaction of the first anaerobic ammonium oxidation reactor, the floating sludge is pumped into the second cyclone. The second cyclone separates the large-particle sludge and small-particle sludge within a specific range, and sends the small-particle sludge into the first cyclone, and the large-particle sludge is returned to the first anaerobic ammonium oxidation reactor, thereby reducing the loss of large-particle sludge in the first anaerobic ammonium oxidation reactor during the reaction, and further increasing the stability of the first anaerobic ammonium oxidation reactor during the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] Figure 1 It is a schematic diagram of the structure of the present invention;

[0037] Figure 2 is an axial view of the present invention;

[0038] Figure 3 is a cross-sectional view of a first anaerobic ammonium oxidation reactor of the present invention;

[0039] Figure 4 yes Figure 3 The enlarged view of point E in the figure;

[0040] Figure 5 yes Figure 3 Enlarged view of point F in

[0041] Figure 6 is a cross-sectional view of the second anaerobic ammonium oxidation reactor of the present invention Figure 1 ;

[0042] Figure 7 yes Figure 5 The enlarged view of G in the figure;

[0043] Figure 8 yes Figure 5 The enlarged view of H in the figure;

[0044] Fig. 9 yes Figure 5 The enlarged view at position I in FIG.

[0045] Fig.10 is a cross-sectional view of the second anaerobic ammonium oxidation reactor of the present invention Figure 2 ;

[0046] Fig.11 is an axial view of the water distributor of the present invention;

[0047] Fig.12 It is a schematic diagram of the working state of the water distributor of the present invention;

[0048] Fig.13 is a partial cross-sectional view of a first anaerobic ammonium oxidation reactor of the present invention;

[0049] Fig.14 is an axial view of the gas distribution disk of the present invention;

[0050] Fig.15 It is an axial view of the throat of the present invention.

[0051] In the figure:

[0052] 100-first anaerobic ammonium oxidation reactor; 110-throat; 111-contraction section; 112-equal cross-section section; 113-first channel; 114-first through hole; 120-reflux pump;

[0053] 200-second anaerobic ammonium oxidation reactor; 210-gas distribution plate; 211-protrusion; 212-gas distribution chamber; 213-second channel; 214-second through hole; 215-third channel; 220-partition plate; 230-shielding member; 231-guide portion; 240-sunken compartment;

[0054] 300-first cyclone;

[0055] 400 - second cyclone;

[0056] 500-treatment tank; 510-sludge digestion tank; 520-shortcut nitrification tank; 530-sedimentation tank;

[0057] 600-denitrification tank;

[0058] 700- the third cyclone;

[0059] 800-gas tank;

[0060] 900- Crushing equipment;

[0061] 1000-three-phase separator;

[0062] 1100-water distributor; 1101-water outlet;

[0063] A1-the first liquid outlet of the first anaerobic ammonium oxidation reactor; A2-the second liquid outlet of the first anaerobic ammonium oxidation reactor; A3-the third liquid outlet of the first anaerobic ammonium oxidation reactor; B1-the first liquid inlet of the first anaerobic ammonium oxidation reactor; B2-the third liquid inlet of the first anaerobic ammonium oxidation reactor; B3-the fourth liquid inlet of the first anaerobic ammonium oxidation reactor; C1-the gas outlet of the first anaerobic ammonium oxidation reactor;

[0064] A4-the first liquid outlet of the second anaerobic ammonium oxidation reactor; A5-the second liquid outlet of the second anaerobic ammonium oxidation reactor; B4-the first liquid inlet of the second anaerobic ammonium oxidation reactor; B5-the second liquid inlet of the second anaerobic ammonium oxidation reactor; C2-the gas outlet of the second anaerobic ammonium oxidation reactor; D1-the gas inlet of the second anaerobic ammonium oxidation reactor. DETAILED DESCRIPTION

[0065] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0066] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0067] The inventors discovered during use that during the operation of the anaerobic ammonium oxidation reactor, as the nitrogen volume load increases, the amount of nitrogen produced gradually increases, and the produced nitrogen will enter the sludge or adhere to the sludge surface, causing the sludge density to decrease. Part of the sludge floats to the water surface and is basically unable to participate in the denitrification reaction, thereby reducing the effective biomass in the reactor; the continuously floating sludge causes the sludge in the system to be continuously lost, causing the denitrification load to decrease, thereby affecting the stability of the system operation; in more serious cases, the lost sludge causes the pipeline to be blocked, causing the system to be unable to operate.

[0068] The following is combined with Figures 1 to 14 , a device for treating sludge digestion liquid by anaerobic ammonia oxidation provided by the present application is described in detail through specific embodiments and application scenarios.

[0069] For the device for treating sludge digestion liquid by anaerobic ammonium oxidation provided in some embodiments of the present application, please refer to Figure 1 and Figure 2 , including a first anaerobic ammonium oxidation reactor 100, a second anaerobic ammonium oxidation reactor 200, a first cyclone 300 and a second cyclone 400.

[0070] In the first solution of this embodiment, Figure 2 , Figure 3 , Figure 6 and Fig.13As shown, the first liquid outlet A4 of the second anaerobic ammonium oxidation reactor is connected to the first liquid inlet of the first cyclone 300; the first liquid outlet of the first cyclone 300 is connected to the first liquid inlet B4 of the second anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the first liquid inlet B1 of the first anaerobic ammonium oxidation reactor; the first liquid outlet A1 of the first anaerobic ammonium oxidation reactor is connected to the liquid inlet of the second cyclone 400; the first liquid outlet of the second cyclone 400 is connected to the first liquid inlet B1 of the first anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the liquid inlet of the first cyclone 300.

[0071] A liquid with a large flow rate enters the first anaerobic ammonium oxidation reactor 100, and another liquid with a small flow rate enters the second anaerobic ammonium oxidation reactor 200. The first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200 reproduce anaerobic ammonium oxidizing bacteria and other substances to form a self-agglomerate (sludge). After a period of time, the liquid reacted in the first anaerobic ammonium oxidation reactor 100 enters the first cyclone 300. The first cyclone 300 separates the large-particle sludge and the small-particle sludge within a specific range, and sends the small-particle sludge to the second anaerobic ammonium oxidation reactor 200 for continued cultivation, and sends the large-particle sludge to the first anaerobic ammonium oxidation reactor 100, so as to better and more effectively enrich the anaerobic ammonium oxidizing bacteria in the first anaerobic ammonium oxidation reactor 100 and improve the denitrification rate. The larger particles can also improve the floating of the sludge in the first anaerobic ammonium oxidation reactor 100, so as to stabilize the system operation and production process. During the reaction of the first anaerobic ammonium oxidation reactor 100, part of the floating sludge is pumped into the second cyclone 400. The second cyclone 400 separates the large-particle sludge and the small-particle sludge within a specific range, and sends the small-particle sludge to the first cyclone 300, and sends the large-particle sludge back to the first anaerobic ammonium oxidation reactor 100, thereby reducing the loss of large-particle sludge in the first anaerobic ammonium oxidation reactor 100 during the reaction, and further increasing the stability of the first anaerobic ammonium oxidation reactor 100 during the reaction.

[0072] It should be noted that the sludge in the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200 carries anaerobic ammonium oxidizing bacteria.

[0073] It should also be noted that the first cyclone 300 and the second cyclone 400 separate large-particle sludge and small-particle sludge within a specific range, and the specific range here is not a fixed interval value, and the corresponding parameters of the first cyclone 300 and the second cyclone 400 can be adjusted to change the interval value of the specific range. Similarly, the third cyclone 700 described below is the same.

[0074] The capacity of the first anaerobic ammonium oxidation reactor 100 is greater than that of the second anaerobic ammonium oxidation reactor 200. The volume of the second anaerobic ammonium oxidation reactor 200 is smaller, and various parameters during the reaction, such as temperature, flow rate, and pH value, are easy to adjust, which can create an environment more suitable for anaerobic ammonium oxidation, accelerate the formation of large-particle anaerobic ammonium oxidation bacteria, and reduce the startup time of the entire system.

[0075] In the second solution of this embodiment, the first liquid outlet of the second cyclone 400 is connected to the second liquid inlet of the first anaerobic ammonium oxidation reactor 100, and the second liquid inlet and the first liquid inlet are two different liquid inlets. By setting the second liquid inlet, the large particle sludge separated by the second cyclone 400 can also be returned to the first anaerobic ammonium oxidation reactor 100. Accordingly, the other structures of the second solution of this embodiment are the same as those of the first solution, and will not be repeated here.

[0076] In the first scheme, the first anaerobic ammonium oxidation reactor 100 is only provided with the first liquid inlet B1, and the second liquid outlet of the first cyclone 300 and the first liquid outlet of the second cyclone 400 are connected through a three-way pipe, and then communicated with the first liquid inlet B1 of the first anaerobic ammonium oxidation reactor; in the second scheme, the first anaerobic ammonium oxidation reactor 100 is provided with the first liquid inlet B1 and the second liquid inlet, the second liquid outlet of the first cyclone 300 is communicated with the first liquid inlet B1 of the first anaerobic ammonium oxidation reactor, and the first liquid outlet of the second cyclone 400 is communicated with the second liquid inlet of the first anaerobic ammonium oxidation reactor 100. Compared with the second scheme, the first scheme requires fewer holes to be opened, has lower processing costs, and is more convenient for pipeline layout. Therefore, the first scheme is preferably adopted in this embodiment.

[0077] Accordingly, high-quality large-particle sludge can also be manually added to the first anaerobic ammonium oxidation reactor 100, so that the large-particle sludge of the first anaerobic ammonium oxidation reactor 100 is within the required range, thereby further ensuring the stability of the system operation.

[0078] In the present embodiment, the bottom of the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200 are both provided with a mud discharge port. During long-term operation, a large amount of waste will be generated inside the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200. If it is not cleaned in time, it will accumulate and occupy the effective volume of the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200, affecting the normal operation and processing capacity of the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200. Therefore, by regularly discharging waste through the mud discharge pipe, waste accumulation can be effectively prevented, and the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200 can be kept in a clean state, thereby ensuring their normal operation. In addition, regular discharge of sludge can also adjust the sludge age of the sludge to avoid excessive sludge age, which leads to excessive growth of nitrifying bacteria.

[0079] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the second liquid outlet A2 of the first anaerobic ammonium oxidation reactor and the second liquid outlet A5 of the second anaerobic ammonium oxidation reactor are respectively connected to the denitrification tank 600. After the liquid in the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200 reacts for a period of time, the liquid is discharged into the denitrification tank 600. The denitrification tank 600 reduces the nitrate in the liquid to nitrogen gas through the action of microorganisms (mainly denitrifying bacteria), thereby achieving nitrogen removal.

[0080] Correspondingly, the second liquid outlet A2 of the first anaerobic ammonium oxidation reactor and the second liquid outlet A5 of the second anaerobic ammonium oxidation reactor can be connected to the denitrification tank 600 respectively, or can be connected in parallel and then connected to the denitrification tank 600, which is not limited in this embodiment.

[0081] As preferred in this embodiment, Figure 3 and Figure 6 As shown, the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200 are upflow anaerobic sludge blanket reactors. Therefore, the second liquid outlet A2 of the first anaerobic ammonium oxidation reactor and the second liquid outlet A5 of the second anaerobic ammonium oxidation reactor are respectively arranged close to the top to facilitate the liquid with good reaction to enter the denitrification tank 600.

[0082] In this embodiment, if Figure 3 As shown, the third liquid outlet A3 of the first anaerobic ammonium oxidation reactor is connected to the fourth liquid inlet B3 of the first anaerobic ammonium oxidation reactor, and the third liquid outlet A3 of the first anaerobic ammonium oxidation reactor is located above the fourth liquid inlet B3 of the first anaerobic ammonium oxidation reactor.

[0083] When the liquid discharged from the first anaerobic ammonium oxidation reactor 100 to the denitrification tank 600 does not meet the standards, for example, the nitrogen content of the liquid does not meet the standards, the liquid in the first anaerobic ammonium oxidation reactor 100 is pumped back to the bottom of the first anaerobic ammonium oxidation reactor 100 for re-reaction under the action of the reflux pump 120 to ensure that the water quality discharged to the denitrification tank 600 meets the standards.

[0084] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, a gas tank 800 is also included, the gas outlet C1 of the first anaerobic ammonium oxidation reactor and the gas outlet C2 of the second anaerobic ammonium oxidation reactor are connected to the gas inlet of the gas tank 800, and the gas outlet of the gas tank 800 is connected to the gas inlet D1 of the second anaerobic ammonium oxidation reactor.

[0085] During the reaction of the liquid in the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200, the sludge uses ammonia nitrogen as an electron donor and nitrite as an electron acceptor to perform an oxidation-reduction reaction to generate nitrogen and water. The nitrogen generated by the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200 enter the gas tank 800 through their own gas outlets respectively and are collected in the gas tank 800. The gas tank 800 sends the collected nitrogen into the second anaerobic ammonium oxidation reactor 200 through the gas inlet D1 of the second anaerobic ammonium oxidation reactor to reduce the dissolved oxygen content in the liquid, thereby putting the water body in an anaerobic state, which is conducive to the cultivation of sludge. By setting up the gas tank 800, the nitrogen generated by the reaction in the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200 can be stored, and the generated nitrogen can be used to participate in the cultivation of the sludge in the second anaerobic ammonium oxidation reactor 200, so as to achieve the reuse of nitrogen.

[0086] The air inlet arranged at the bottom also allows the liquid inside the second anaerobic ammonium oxidation reactor 200 to rise when the nitrogen enters the second anaerobic ammonium oxidation reactor 200, and the liquid falls due to gravity and pressure, forming a circulation flow, which can also detach the bubbles attached to the granular anaerobic ammonium oxidizing bacteria to a certain extent; this circulation flow helps to strengthen the mixing and mass transfer of the liquid, and improves the processing capacity of the second anaerobic ammonium oxidation reactor 200. In addition, the introduction of nitrogen can also reduce the dissolved oxygen content.

[0087] In some embodiments, the gas outlet of the gas tank 800 is only connected to the gas outlet C1 of the first anaerobic ammonium oxidation reactor.

[0088] In some embodiments, the gas outlet of the gas tank 800 is only connected to the gas outlet C2 of the second anaerobic ammonium oxidation reactor.

[0089] In this embodiment, if Figure 3and Figure 6 As shown, the gas outlet C1 of the first anaerobic ammonium oxidation reactor is preferably arranged at the top of the first anaerobic ammonium oxidation reactor 100, and the gas outlet C2 of the second anaerobic ammonium oxidation reactor is preferably arranged at the top of the second anaerobic ammonium oxidation reactor 200. Such arrangement is more conducive to the discharge of nitrogen.

[0090] In this embodiment, the gas outlet of the gas tank 800 is connected to the gas inlet D1 of the second anaerobic ammonium oxidation reactor through the gas distribution valve. Under the action of the gas distribution valve, nitrogen can be controlled to be discharged into the second anaerobic ammonium oxidation reactor 200, which is convenient for adjusting and controlling the nitrogen content in the second anaerobic ammonium oxidation reactor 200; at the same time, the gas distribution valve can also discharge the nitrogen in the gas tank 800 to the outside to prevent the pressure in the gas tank 800 from being too high, thereby playing a role in pressure relief.

[0091] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, it also includes a third cyclone 700 and a treatment tank 500; the first liquid outlet of the treatment tank 500 is connected to the third liquid inlet B2 of the first anaerobic ammonium oxidation reactor, and the second liquid outlet of the treatment tank 500 is connected to the liquid inlet of the third cyclone 700; the first liquid outlet of the third cyclone 700 is connected to the second liquid inlet B5 of the second anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the liquid inlet of the treatment tank 500.

[0092] Part of the liquid treated in the treatment tank 500 directly enters the first anaerobic ammonium oxidation reactor 100 through the third liquid inlet B2 of the first anaerobic ammonium oxidation reactor, and the other part of the liquid enters the third cyclone 700. The third cyclone 700 separates the heavier sludge and the lighter sludge in a specific range, and sends the lighter sludge back to the treatment tank 500 for further treatment, and sends the heavier sludge to the second anaerobic ammonium oxidation reactor 200.

[0093] It should be noted that the sludge discharged from the treatment tank 500 does not carry anaerobic ammonia-oxidizing bacteria.

[0094] Correspondingly, the treatment pool 500 has a sewage outlet, which can be used for emergency drainage and serve as an emergency discharge channel.

[0095] In this embodiment, if Figure 1 and Figure 2As shown, the treatment tank 500 includes a sludge digestion liquid tank 510, a short-cut nitrification tank 520 and a sedimentation tank 530. The sludge digestion liquid tank 510 is used to store sludge; the short-cut nitrification tank 520 converts ammonia nitrogen in the liquid into nitrite nitrogen; the sedimentation tank 530 removes suspended matter in the liquid; the lighter sludge discharged from the third cyclone 700 is returned to the short-cut nitrification tank 520 for further treatment, so that it is further precipitated in the sedimentation tank 530.

[0096] In this embodiment, the third liquid inlet B2 of the first anaerobic ammonium oxidation reactor is arranged near the bottom, and the second liquid inlet B5 of the second anaerobic ammonium oxidation reactor is also arranged near the bottom. In the process that the liquid enters the first anaerobic ammonium oxidation reactor 100 through the third liquid inlet B2 of the first anaerobic ammonium oxidation reactor and enters the second anaerobic ammonium oxidation reactor 200 through the second liquid inlet B5 of the second anaerobic ammonium oxidation reactor, the large particles of sludge precipitated at the bottom are impacted respectively, and move upward under the influence of the water flow. At the same time, the particles sink under their own weight, forming a circular flow, which is conducive to the mixing and mass transfer of the liquid.

[0097] like Figure 3 , Figure 4 and Fig.15 As shown, a throat 110 is provided near the top of the liquid inlet in the first anaerobic ammonium oxidation reactor 100; the throat 110 is provided with a first channel 113 with two ends respectively penetrating the throat 110 along the axial direction of the first anaerobic ammonium oxidation reactor 100, and the cross-sectional area at the inlet of the first channel 113 is greater than the cross-sectional area at the outlet. The provision of the first channel 113 can change the flow velocity of the liquid in the first anaerobic ammonium oxidation reactor 100, thereby improving the mass transfer efficiency.

[0098] like Figure 4 and Fig.15 As shown, the throat 110 is also provided with a plurality of first through holes 114 in the circumferential direction thereof, which are connected to the first channel 113. The large particles of sludge in the first anaerobic ammonium oxidation reactor 100 settle downward under the action of gravity and can pass through the throat 110 through the first through holes 114. The plurality of first through holes 114 are provided, so that the throat 110 changes the flow rate of the liquid, and the sinking sludge can be gathered at the inner bottom of the first anaerobic ammonium oxidation reactor 100 through the plurality of first through holes 114, thereby avoiding the accumulation of sludge on the upper surface of the throat 110 and reducing the loss of sludge; accordingly, the sludge can also settle downward through the first channel 113.

[0099] Specifically, Figure 4As shown, the throat 110 includes a uniform cross-section section 112 and a contraction section 111. The contraction section 111 is arranged near the third liquid inlet B2 of the first anaerobic ammonium oxidation reactor, and the inner diameter gradually decreases from the bottom to the top. A plurality of first through holes 114 are arranged on the contraction section 111 along the circumferential direction of the contraction section 111.

[0100] The outer circumferential surface of the contraction section 111 is connected to the inner wall of the first anaerobic ammonium oxidation reactor 100. Therefore, a plurality of first through holes 114 are provided on the contraction section 111, so that the large particles of sludge that sink can pass through the contraction section 111 and gather at the inner bottom of the first anaerobic ammonium oxidation reactor 100, thereby preventing a large amount of large particles of sludge from gathering on the upper surface of the contraction section 111. The inner diameter of the contraction section 111 gradually decreases from the bottom to the top. When the liquid enters from the third liquid inlet B2 of the first anaerobic ammonium oxidation reactor, the flow rate gradually increases during the process of passing through the contraction section 111, thereby reducing the stratification of the sludge.

[0101] The top opening of the contraction section 111 is connected to the equal-section section 112, and the inner diameter of the equal-section section 112 is the same as the inner diameter of the top opening of the contraction section 111. After the liquid passes through the contraction section 111 and enters the equal-section section 112, it will not encounter a sudden cross-sectional change, thereby reducing the energy loss of the liquid and maintaining the fluid form.

[0102] In this embodiment, if Figure 3 As shown, the fourth liquid inlet B3 of the first anaerobic ammonium oxidation reactor is also located below the contraction section 111, so that the liquid that does not meet the standards in the first anaerobic ammonium oxidation reactor 100 can also pass through the contraction section 111 and the equal-section section 112, thereby increasing the flow rate of the liquid and reducing the stratification of the sludge.

[0103] like Figure 6 , Figure 8 and Fig.10 As shown, a partition plate 220 and a shielding member 230 are provided in the second anaerobic ammonium oxidation reactor 200. The opposite ends of the partition plate 220 are connected to the inner wall of the second anaerobic ammonium oxidation reactor 200, and a sinking compartment 240 is formed between the inner wall of the partition plate 220 and the inner wall of the second anaerobic ammonium oxidation reactor 200. The first liquid inlet B4 of the second anaerobic ammonium oxidation reactor is located above the sinking compartment 240, and the shielding member 230 is located below the sinking compartment 240.

[0104] The sludge with smaller particles separated from the first cyclone 300 enters the sinking compartment 240 through the first liquid inlet B4 of the second anaerobic ammonium oxidation reactor. Since the shielding member 230 at the bottom of the sinking compartment 240 can block the water flow, the sludge with smaller particles can sink smoothly in the sinking compartment 240 and finally enter the second anaerobic ammonium oxidation reactor 200, and move upward under the influence of the water flow. At the same time, the particles sink under their own weight, forming a circulating flow, which is beneficial to the mixing and mass transfer of the liquid, and can also effectively prevent the newly introduced smaller particle anaerobic ammonium oxidation bacteria from floating on the upper layer.

[0105] It should be noted that, although the first liquid inlet B4 of the second anaerobic ammonium oxidation reactor is directly set in the middle position of the second anaerobic ammonium oxidation reactor 200, the sludge with smaller particles separated from the first cyclone 300 can also enter the second anaerobic ammonium oxidation reactor 200 to form a flow cycle. However, the liquid entering the second anaerobic ammonium oxidation reactor 200 along with the smaller particles will also cause a certain impact on the sludge at the bottom. Under the joint action of the liquid entering the second anaerobic ammonium oxidation reactor 200 through the second liquid inlet B5 of the second anaerobic ammonium oxidation reactor, the sludge at the bottom will be impacted higher. During the reaction of the second anaerobic ammonium oxidation reactor 200, the nitrogen concentration above is greater than the nitrogen concentration below, and the sludge that is impacted higher may have more nitrogen attached to the surface, thereby causing large particles of sludge to float up, affecting the stability of the system operation. Therefore, by setting the sinking compartment 240, while avoiding the floating of large particles of sludge, a circulating flow is also formed, which is conducive to the mixing and mass transfer of liquids.

[0106] like Figure 8 As shown, the shielding member 230 has a guide portion 231 inclined downward on one side facing the sinking compartment 240. Sludge with smaller particles can sink in the sinking compartment 240 and enter the middle of the second anaerobic ammonium oxidation reactor 200 under the action of the guide portion 231 to be better impacted by the water flow and form a flow cycle.

[0107] Accordingly, the orthographic projection of the shielding member 230 in the axial direction of the second anaerobic ammonium oxidation reactor 200 can cover the orthographic projection of the sinking compartment 240 in the axial direction of the second anaerobic ammonium oxidation reactor 200, so that the shielding member 230 can better block the water flow and prevent the water flow from entering the sinking compartment 240 to affect the sinking of small particles of sludge. The projection of the partition plate 220 and the shielding member 230 in this direction is an arc, and the curvature of the shielding member 230 is greater than or equal to the curvature of the shielding member 230; of course, the projection of the partition plate 220 and the shielding member 230 in this direction can also be circular, and this embodiment does not limit this.

[0108] In this embodiment, if Fig.10As shown, the top opening of the sinking compartment 240 is expanded so that smaller particles passing through the first liquid inlet B4 of the second anaerobic ammonium oxidation reactor can enter the sinking compartment 240 better.

[0109] like Figure 6 and Figure 7 As shown, the second anaerobic ammonium oxidation reactor 200 is further provided with a gas distribution plate 210. The gas distribution plate 210 is provided with a second channel 213 with both ends penetrating the gas distribution plate 210 along the axial direction of the second anaerobic ammonium oxidation reactor 200. The gas distribution plate 210 has a gas distribution chamber 212 and a plurality of second through holes 214. The gas inlet D1 of the second anaerobic ammonium oxidation reactor is connected with the gas distribution chamber 212, and the gas distribution chamber 212 is connected with the second channel 213 through the plurality of second through holes 214.

[0110] A plurality of second through holes 214 are evenly arranged on the circumferential wall of the second channel 213 so that the gas distribution chamber 212 is connected to the second channel 213; the nitrogen entering the gas distribution chamber 212 through the air inlet D1 of the second anaerobic ammonia oxidation reactor, and then entering the second channel 213 through the plurality of second through holes 214, and then entering the second anaerobic ammonia oxidation reactor 200, can ensure that the nitrogen concentration of the second anaerobic ammonia oxidation reactor 200 is evenly distributed, thereby avoiding uneven reaction caused by excessively high or low local concentrations.

[0111] In some embodiments, a plurality of second through holes 214 are disposed on the top of the gas distribution plate 210 , such that the gas distribution chamber 212 is in communication with the inner cavity of the second anaerobic ammonium oxidation reactor 200 .

[0112] In some embodiments, a plurality of second through holes 214 are disposed on the circumferential wall of the second channel 213 and the top of the gas distribution plate 210 , so that the gas distribution chamber 212 is connected to the second channel 213 and the inner cavity of the second anaerobic ammonium oxidation reactor 200 .

[0113] like Figure 7 and Fig.14 As shown, the diameter of the second channel 213 gradually decreases from the bottom to the top. When the water flows through the second channel 213, the flow rate gradually increases, thereby alleviating the stratification phenomenon of the sludge.

[0114] like Figure 7 and Fig.14As shown, the gas distribution plate 210 is further provided with a plurality of third channels 215 along the axial direction of the second anaerobic ammonium oxidation reactor 200, and the plurality of third channels 215 are arranged along the circumferential direction of the first channel 113. The provision of a plurality of third channels 215 is conducive to the downward sedimentation of large particles of sludge, so that the large particles of sludge can pass through the third channels 215 and gather at the inner bottom of the second anaerobic ammonium oxidation reactor 200, thereby avoiding the loss of sludge; at the same time, it also avoids the situation where sludge gathers on the upper surface of the gas distribution plate 210. Accordingly, the sludge can also be precipitated downward through the second channel 213.

[0115] In this embodiment, if Figure 7 and Fig.14 As shown, the outer circumferential surface of the gas distribution plate 210 is provided with a plurality of protrusions 211, and is installed in the inner wall of the second anaerobic ammonium oxidation reactor 200 through the plurality of protrusions 211; wherein the third channel 215 is the space between any two adjacent protrusions 211 and the inner wall of the second anaerobic ammonium oxidation reactor 200.

[0116] In this embodiment, if Figure 6 As shown, the second liquid inlet B5 of the second anaerobic ammonium oxidation reactor is arranged below the gas distribution plate 210, so that the liquid entering the second anaerobic ammonium oxidation reactor 200 through the second liquid inlet B5 of the second anaerobic ammonium oxidation reactor can pass through the first channel 113 to increase the flow rate of the liquid and reduce the stratification phenomenon of the sludge.

[0117] like Figure 5 and Fig. 9 As shown, a water distributor 1100 is provided near the inner bottom of the first anaerobic ammonium oxidation reactor 100, and the water distributor 1100 is connected to the first liquid outlet of the treatment tank 500 through the third liquid inlet B2 of the first anaerobic ammonium oxidation reactor; a water distributor 1100 is also provided near the inner bottom of the second anaerobic ammonium oxidation reactor 200, and the water distributor 1100 is connected to the first liquid outlet of the third cyclone 700 through the second liquid inlet B5 of the second anaerobic ammonium oxidation reactor.

[0118] The liquid entering the first anaerobic ammonium oxidation reactor 100 through the third liquid inlet B2 of the first anaerobic ammonium oxidation reactor and the liquid entering the second anaerobic ammonium oxidation reactor 200 through the second liquid inlet B5 of the second anaerobic ammonium oxidation reactor are respectively discharged through a plurality of water outlet holes 1101 provided in the water distributor 1100 to ensure uniform drainage.

[0119] The bottom of the two water distributors 1100 are respectively provided with a plurality of inclined water outlet holes 1101. The inclined water outlet holes 1101 can carry the large sludge particles deposited at the bottom of the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200. At the same time, the large sludge particles also sink under the action of gravity, forming a circulation flow, which is beneficial to the mixing and mass transfer of the liquid. The flow direction of the liquid discharged from the water outlet holes 1101 is as follows: Fig.12 As indicated by the arrow in .

[0120] like Fig.11 As shown, the water distributor 1100 adopts a coil design to evenly distribute water. Fig.11 The layout shown is a regular curved layout, but can also be an irregular curved layout.

[0121] It should be noted that the water distributor 1100 has more than one water inlet, and multiple water inlets can be provided according to the length of the water distributor 1100 to ensure that the water output of each water outlet 1101 is substantially the same.

[0122] The second anaerobic ammonium oxidation reactor 200 is provided with an insulating container on the outside, so that the culture temperature of the second anaerobic ammonium oxidation reactor 200 can be stably maintained at a value between 30°C and 35°C, ensuring the reaction activity of the anaerobic ammonium oxidation bacteria to improve the ammonia nitrogen conversion efficiency.

[0123] like Figure 1 and Figure 2 As shown, it also includes a crushing device 900. The feed port of the crushing device 900 is connected to the second liquid outlet of the second cyclone 400, and the discharge port is connected to the first liquid inlet B1 of the first anaerobic ammonium oxidation reactor.

[0124] The small particle sludge screened out by the second cyclone 400 can also enter the crushing device. The crushing device 900 crushes the small particle sludge and feeds it into the first anaerobic ammonium oxidation reactor 100 through the first liquid inlet B1 of the first anaerobic ammonium oxidation reactor to provide biomass.

[0125] In this embodiment, the second liquid outlet of the second cyclone 400 is connected to the liquid inlet of the first cyclone 300 and the feed inlet of the crushing device 900 through a three-way valve. The three-way valve is used to control the second cyclone 400 to communicate with the crushing device 900 or the first cyclone 300 to control the flow direction of the small particle sludge.

[0126] It should be noted that the crushing device 900 in this embodiment is a prior art and is not an improvement of this embodiment, and will not be described in detail here.

[0127] like Figure 3 and Figure 6As shown, a three-phase separator 1000 is respectively disposed inside the first anaerobic ammonium oxidation reactor 100 and the second anaerobic ammonium oxidation reactor 200. The three-phase separator 1000 can help separate the sludge from the liquid, and help the sludge remove the attached nitrogen, and prevent the sludge from floating as much as possible.

[0128] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0129] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0130] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for treating sludge digestion liquid by anaerobic ammonium oxidation, characterized in that: It includes a first anaerobic ammonium oxidation reactor, a second anaerobic ammonium oxidation reactor, a first cyclone and a second cyclone; The first liquid outlet of the second anaerobic ammonium oxidation reactor is connected to the first liquid inlet of the first cyclone; the first liquid outlet of the first cyclone is connected to the first liquid inlet of the second anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the first liquid inlet of the first anaerobic ammonium oxidation reactor; The first liquid outlet of the first anaerobic ammonium oxidation reactor is connected to the liquid inlet of the second cyclone; the first liquid outlet of the second cyclone is connected to the second liquid inlet or the first liquid inlet of the first anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the liquid inlet of the first cyclone; Wherein, the effective volume and treatment load of the first anaerobic ammonium oxidation reactor are greater than the effective volume and treatment load of the second anaerobic ammonium oxidation reactor; The first anaerobic ammonium oxidation reactor is provided with a throat; The throat is provided with a first channel with both ends passing through the throat along the axial direction of the first anaerobic ammonium oxidation reactor, and the cross-sectional area at the inlet of the first channel is larger than the cross-sectional area at the outlet; the throat is also provided with a plurality of first through holes in communication with the first channel in the circumferential direction; Wherein, the first liquid inlet or the second liquid inlet of the first anaerobic ammonium oxidation reactor is located below the throat.

2. The device for treating sludge digestion liquid by anaerobic ammonium oxidation according to claim 1, characterized in that: Also includes gas tanks; The gas outlet of the first anaerobic ammonium oxidation reactor and / or the gas outlet of the second anaerobic ammonium oxidation reactor are communicated with the gas inlet of the gas tank, and the gas outlet of the gas tank is communicated with the gas inlet of the second anaerobic ammonium oxidation reactor; Wherein, the air inlet of the second anaerobic ammonium oxidation reactor is located below the air outlet of the second anaerobic ammonium oxidation reactor.

3. The device for treating sludge digestion liquid by anaerobic ammonium oxidation according to claim 1, characterized in that: Also included is a third cyclone; The first liquid outlet of the third cyclone is connected to the second liquid inlet of the second anaerobic ammonium oxidation reactor, and the second liquid outlet is connected to the liquid inlet of the treatment tank; The liquid inlet of the third cyclone is used to connect to the liquid outlet of the treatment tank.

4. The device for treating sludge digestion liquid by anaerobic ammonium oxidation according to claim 1, characterized in that: The throat includes a constant cross-section section and a contraction section; The inner diameter of the contraction section gradually decreases from the bottom to the top, and the top opening is connected to the equal cross-section section; The inner diameter of the uniform cross-section section is the same as the inner diameter of the top opening of the contraction section; A plurality of the first through holes are arranged on the contraction section along the circumferential direction of the contraction section.

5. The device for treating sludge digestion liquid by anaerobic ammonium oxidation according to claim 1, characterized in that: The second anaerobic ammonium oxidation reactor is provided with a partition plate and a shielding member; A sinking compartment is formed between the partition plate and the inner wall of the second anaerobic ammonium oxidation reactor, the first liquid inlet of the second anaerobic ammonium oxidation reactor is located above the sinking compartment, and the shielding member is located below the sinking compartment.

6. The device for treating sludge digestion liquid by anaerobic ammonium oxidation according to claim 5, characterized in that: The shielding member has a guide portion on one side facing the sinking compartment, and the guide portion is inclined toward the bottom of the second anaerobic ammonium oxidation reactor.

7. The device for treating sludge digestion liquid by anaerobic ammonium oxidation according to claim 2, characterized in that: The second anaerobic ammonium oxidation reactor is also provided with a gas distribution plate; The gas distribution plate is provided with a second channel and a plurality of third channels, both ends of which respectively penetrate the gas distribution plate, along the axial direction of the second anaerobic ammonia oxidation reactor. The diameter of the second channel gradually decreases from the bottom to the top, and the plurality of third channels are arranged along the circumferential direction of the gas distribution plate. The gas distribution plate also has a gas distribution chamber and a plurality of second through holes. The air inlet of the second anaerobic ammonium oxidation reactor is connected to the gas distribution chamber. The gas distribution chamber is connected to the second channel and / or the inner cavity of the second anaerobic ammonium oxidation reactor through the plurality of second through holes.

8. The device for treating sludge digestion liquid by anaerobic ammonium oxidation according to claim 3, characterized in that: A water distributor is provided in each of the first anaerobic ammonium oxidation reactor and the second anaerobic ammonium oxidation reactor, and the water distributor is arranged close to the inner bottom of the first anaerobic ammonium oxidation reactor and the second anaerobic ammonium oxidation reactor respectively; One of the water distributors is connected to the first liquid outlet of the treatment tank through the third liquid inlet of the first anaerobic ammonium oxidation reactor, and the other water distributor is connected to the first liquid outlet of the third cyclone through the second liquid inlet of the second anaerobic ammonium oxidation reactor; Wherein, a plurality of inclined water outlet holes are arranged at the bottom of the water distributor.

9. The device for treating sludge digestion liquid by anaerobic ammonium oxidation according to claim 1 or 5, characterized in that: The second anaerobic ammonium oxidation reactor is externally sheathed with a heat-insulating container.

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