Autotrophic nitrogen removal wastewater treatment equipment

Abstract

The utility model relates to autotrophic nitrogen removal wastewater treatment equipment which is characterized in that a circular reaction tank is adopted in order to save the occupied area, and in order to prolong the wastewater treatment path, a plurality of concentric partition plates are arranged in the reaction tank, and an aeration riser tube is arranged in the center of the reaction tank, so that a first-stage annular treatment cavity, each transition annular treatment cavity and a final-stage annular treatment cavity are formed; wastewater enters the transition annular treatment cavities from the first-stage annular treatment cavity, passes through the transition annular treatment cavities and finally flows into the final-stage annular treatment cavity, so that the wastewater treatment effect is ensured; under the condition that wastewater treatment is not affected, the aeration pipelines and the heating assemblies at the bottoms of all the cavities of the reaction tank can be maintained by opening the first positioning clamping plate and the second positioning clamping plate, normal wastewater treatment is guaranteed, and the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to autotrophic denitrification wastewater treatment equipment. Background Art

[0002] At present, municipal sewage after anaerobic reactor pretreatment still needs to be treated with aerobic denitrification, but it is usually necessary to add carbon sources in the aerobic section, which has high operating costs. The CANON process is one of the fully autotrophic denitrification technology methods. The CANON reaction process requires the cooperation of nitrifying bacteria (AOB) and anaerobic ammonia oxidizing bacteria (AMX) to complete. First, part of the ammonia nitrogen in the water is converted into nitrite nitrogen by AOB under aerobic conditions, and then the remaining ammonia nitrogen and nitrite nitrogen are mostly converted into nitrogen gas by AMX under anoxic / anaerobic conditions and removed from the water, while a small amount of nitrate nitrogen is generated. Aerobic granular sludge can not only effectively intercept autotrophic microorganisms with slower growth rates, such as AOB and AMX, but also utilize the matrix mass transfer in all directions and the differences in microbial niches to form multiple functional stratifications from the outside to the inside, thereby achieving the goal of reducing the reactor volume and enhancing the reactor treatment efficiency. Therefore, aerobic granular sludge with CANON reaction function (abbreviated as: CANON granular sludge) is considered to be a good carrier for realizing the fully autotrophic biological denitrification process.

[0003] CN 106830318 B discloses a wastewater treatment device and a treatment method for achieving full autotrophic denitrification based on aerobic granular sludge. The treatment device comprises an inlet pipe for inletting wastewater to be treated, an outlet pipe for outletting treated wastewater, a reaction tank filled with CANON granular sludge, an aeration riser with an aeration function connected to the bottom of the reaction tank, a cyclone separator connected to the reaction tank for separating granular sludge and water, and a sludge return system connected between the aeration riser and the cyclone separator for returning granular sludge, one end of the aeration riser passes through the bottom of the reaction tank and extends to the inside of the reaction tank, the inlet pipe is connected to the aeration riser, and the outlet pipe is connected to the cyclone separator. This device has brought into play the advantages of the CANON process. At the same time, in order to maintain the stability of the granular sludge structure, the treatment device uses the aeration riser and the cyclone separator to ensure that the granular sludge remains in a granular state, washes the flocculent sludge in time, and sets an appropriate residual ammonia nitrogen concentration under low DO conditions to effectively inhibit the excessive growth of NOB in the sludge. However, there are still the following problems during operation: 1. When the aeration pipeline and heating components at the bottom of the reaction tank are damaged and do not work properly, maintenance cannot be carried out while the wastewater treatment is being carried out, resulting in interruption of the wastewater treatment work and affecting the wastewater treatment efficiency; 2. Compared with the circular processor, it occupies a larger area. Utility Model Content

[0004] The purpose of the utility model is to provide a kind of autotrophic denitrification wastewater treatment equipment with reasonable structure and reliable use to solve the above problems. On the one hand, it is convenient to maintain the aeration pipeline and heating components at the bottom of the reaction tank without affecting the wastewater treatment, and at the same time, it saves floor space.

[0005] The technical solution of the utility model is:

[0006] An autotrophic denitrification wastewater treatment device comprises a reaction tank, an aeration pipeline, a heating component, an aeration riser and a cyclone separator, wherein the bottom surface of the lower end of the aeration riser is provided with a wastewater inlet, the side of the lower end is provided with an aeration port, and a sludge return pipeline is provided between the lower end of the cyclone separator and the lower part of the aeration riser. The technical key points are as follows: the reaction tank is circular and has a plurality of concentric baffles therein, the aeration riser is located at the center of the reaction tank and forms a primary annular treatment chamber between the concentric baffles closest to it, a final annular treatment chamber is formed between the outer wall of the reaction tank and the concentric baffles closest to it, a transition annular treatment chamber is formed between two adjacent concentric baffles, the height positions of the primary annular treatment chamber, each transition annular treatment chamber and the final annular treatment chamber are successively reduced, and the aeration riser is provided with a plurality of concentric baffles therein, and the aeration riser is provided with a plurality of concentric baffles therein, and the aeration riser is provided with a plurality of concentric baffles therein, and the first annular treatment chamber is provided with a plurality of concentric baffles therein, and the first annular treatment chamber is provided with a plurality of concentric baffles therein, and the first annular treatment chamber is provided with a plurality of concentric baffles therein, and the first annular treatment chamber is provided with a plurality of concentric baffles therein, and the second ... The top of the riser is higher than the top of the primary annular treatment chamber and a primary overflow channel is provided between the two. A transition overflow channel is provided between the primary annular treatment chamber and its most adjacent transition annular treatment chamber and between two adjacent transition annular treatment chambers. A final overflow channel is provided between the transition annular treatment chamber and the final annular treatment chamber. A discharge channel connecting the final annular treatment chamber and the cyclone separator is provided on the side wall of the reaction tank. A lifting bracket is provided at the bottom of the reaction tank. A first positioning clamp and a second positioning clamp are respectively provided on the bottom surfaces of the primary annular treatment chamber, each transition annular treatment chamber and the final annular treatment chamber. The aeration pipeline is clamped between the first positioning clamp and the bottom surface of the reaction tank, and the heating assembly is clamped between the second positioning clamp and the bottom surface of the reaction tank.

[0007] The above-mentioned autotrophic denitrification wastewater treatment equipment has opposite directions of the first-level overflow channel and the transition overflow channel connected to the first-level annular treatment chamber, opposite directions of the two transition overflow channels connected to the same transition annular treatment chamber, and opposite directions of the transition overflow channel and the final overflow channel connected to the same transition annular treatment chamber.

[0008] In the above-mentioned autotrophic denitrification wastewater treatment equipment, the inner heights of the first-stage annular treatment chamber, each transition annular treatment chamber and the final-stage annular treatment chamber are equal.

[0009] In the above-mentioned autotrophic denitrification wastewater treatment equipment, the tops of the first-stage annular treatment chamber, each transition annular treatment chamber and the final-stage annular treatment chamber are all provided with an annular insulation pressure cover, the upper surface of the annular insulation pressure cover is provided with a manhole cover and a small insulation cover, and the inner side of the small insulation cover is provided with a temperature enhancing element for inserting into the corresponding first-stage annular treatment chamber, each transition annular treatment chamber or the final-stage annular treatment chamber, so as not to affect the temperature conditions required for wastewater treatment when maintaining the bottom heating element.

[0010] In the above-mentioned autotrophic denitrification wastewater treatment equipment, a walking ladder is provided on the side of the reaction tank.

[0011] The beneficial effects of the utility model are:

[0012] 1. In order to save floor space, this equipment adopts a circular reaction tank. At the same time, in order to extend the wastewater treatment path, multiple concentric baffles are arranged in the reaction tank and an aeration riser is arranged in the center of the reaction tank to form a primary annular treatment chamber, various transition annular treatment chambers and a final annular treatment chamber. The wastewater enters the transition annular treatment chamber from the primary annular treatment chamber, passes through various transition annular treatment chambers, and finally flows into the final annular treatment chamber to ensure the wastewater treatment effect.

[0013] 2. Without affecting the wastewater treatment, the first positioning clamp and the second positioning clamp can be opened to facilitate the maintenance of the aeration pipeline and heating components at the bottom of each chamber of the reaction tank, ensure the normal wastewater treatment, and improve the wastewater treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 A top view of

[0016] Figure 3 yes Figure 1 Enlarged view of part A in the middle.

[0017] In the figure: 1. cyclone separator, 2. discharge channel, 3. reaction tank, 4. small insulation cover, 5. transition annular treatment chamber, 6. transition overflow channel, 7. primary annular treatment chamber, 8. aeration riser, 9. primary overflow channel, 10. final overflow channel, 11. walking ladder, 12. lifting bracket, 13. final annular treatment chamber, 14. aeration port, 15. wastewater inlet, 16. sludge return pipeline, 17. first positioning splint, 18. second positioning splint, 19. temperature enhancement element, 20. manhole cover, 21. annular insulation pressure cover, 22. heating component, 23. aeration pipeline. DETAILED DESCRIPTION

[0018] The utility model is described in detail according to the accompanying drawings of the specification.

[0019] like Figure 1 to Figure 3 As shown, the autotrophic denitrification wastewater treatment equipment includes a reaction tank 3, an aeration pipeline 23, a heating assembly 22, an aeration riser pipe 8 and a cyclone separator 1. A wastewater inlet 15 is provided on the bottom surface of the lower end of the aeration riser pipe 8, an aeration port 14 is provided on the side of the lower end, and a sludge return pipeline 16 is provided between the lower end of the cyclone separator 1 and the lower part of the aeration riser pipe 8.

[0020] The reaction tank 3 is circular and has a plurality of concentric baffles therein. The aeration riser 8 is located at the center of the reaction tank 3 and forms a primary annular treatment chamber 7 between the concentric baffles closest to it. The outer wall of the reaction tank 3 and the concentric baffles closest to it form a final annular treatment chamber 13. A transition annular treatment chamber 5 is formed between two adjacent concentric baffles. The height positions of the primary annular treatment chamber 7, each transition annular treatment chamber 5 and the final annular treatment chamber 13 are successively reduced, and are all filled with CANON granular sludge, and are all provided with a flow-pushing assembly, which is omitted in the figure. The top of the aeration riser 8 is higher than the top of the primary annular treatment chamber 7 and a primary overflow channel 9 is provided between the two. A transition overflow channel 6 is provided between the primary annular treatment chamber 7 and the transition annular treatment chamber closest to it, and between two adjacent transition annular treatment chambers 5. A final overflow channel 10 is provided between the transition annular treatment chamber 5 and the final annular treatment chamber 13. A discharge channel 2 connecting the final annular treatment chamber 13 and the cyclone separator 1 is provided on the side wall of the reaction tank 3.

[0021] The bottom of the reaction tank 3 is provided with a lifting bracket 12 to facilitate the passage of the staff. The bottom surfaces of the primary annular treatment chamber 7, each transition annular treatment chamber 5 and the final annular treatment chamber 13 are respectively provided with a first positioning clamping plate 17 and a second positioning clamping plate 18, the aeration pipeline 23 is clamped between the first positioning clamping plate 17 and the bottom surface of the reaction tank 3, and the heating assembly 22 is clamped between the second positioning clamping plate 18 and the bottom surface of the reaction tank 3.

[0022] In this embodiment, the primary overflow channel 9 and the transition overflow channel 6 connected to the primary annular treatment chamber 7 are in opposite directions, the two transition overflow channels 6 connected to the same transition annular treatment chamber 5 are in opposite directions, and the transition overflow channel 6 and the final overflow channel 10 connected to the same transition annular treatment chamber 5 are in opposite directions. The inner heights of the primary annular treatment chamber 7, each transition annular treatment chamber 5 and the final annular treatment chamber 13 are equal. The tops of the primary annular treatment chamber 7, each transition annular treatment chamber 5 and the final annular treatment chamber 13 are all provided with an annular insulation pressure cover 21, the upper surface of the annular insulation pressure cover 21 is provided with a manhole cover 20 and an insulation small cover 4, and the inner side of the insulation small cover 4 is provided with a temperature enhancement element 19 for inserting into the corresponding primary annular treatment chamber 7, each transition annular treatment chamber 5 or the final annular treatment chamber 13, so as not to affect the temperature conditions required for wastewater treatment when maintaining the bottom heating assembly 22. A walking ladder 11 is provided on the side of the reaction tank 3.

[0023] Working principle:

[0024] The municipal sewage pretreated by the anaerobic reactor enters the lower end of the aeration riser 8 through the wastewater inlet 15, mixes with the gas entering from the aeration port 14 and rises, falls from a height into the primary annular treatment chamber 7 through the primary overflow channel 9, mixes with the CANON granular sludge in the primary annular treatment chamber 7 and is purified. Then, the mixed material moves toward the adjacent transition overflow channel 6 under the action of the flow pusher, and then overflows from the transition overflow channel 6 to the nearest transition annular treatment chamber 5. Based on this principle, the wastewater is continuously purified and enters the final annular treatment chamber 13 through each transition overflow channel 6 and the final overflow channel 10 in turn along with the CANON granular sludge, and finally enters the cyclone separator 1 through the discharge channel 2. After centrifugal solid-liquid separation, the purified water is output, a part of the sludge is discharged, and a part of the sludge is returned to the aeration riser 8 through the sludge return pipeline 16, mixed with the newly entered wastewater and gas, and overflows into the primary annular treatment chamber 7, and the above process is repeated. During the wastewater treatment process, if the air temperature is low, the temperature enhancement element 19 can be used to assist in heating.

[0025] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. An autotrophic denitrification wastewater treatment equipment, comprising a reaction tank, an aeration pipeline, a heating assembly, an aeration riser and a cyclone separator, wherein a wastewater inlet is provided on the bottom surface of the lower end of the aeration riser, an aeration port is provided on the side of the lower end, and a sludge return pipeline is provided between the lower end of the cyclone separator and the lower part of the aeration riser, characterized in that: The reaction pool is circular and has a plurality of concentric baffles therein. The aeration riser is located at the center of the reaction pool and forms a primary annular treatment chamber between the aeration riser and the concentric baffles closest to it. A final annular treatment chamber is formed between the outer wall of the reaction pool and the concentric baffles closest to it. A transition annular treatment chamber is formed between two adjacent concentric baffles. The height positions of the primary annular treatment chamber, each transition annular treatment chamber and the final annular treatment chamber decrease in sequence. The top of the aeration riser is higher than the top of the primary annular treatment chamber and a primary overflow channel is provided between the two. The primary annular treatment chamber and the transition annular treatment chamber closest to it are connected to each other. A transition overflow channel is provided between the transition annular treatment chambers and between two adjacent transition annular treatment chambers, a final overflow channel is provided between the transition annular treatment chamber and the final annular treatment chamber, a discharge channel connecting the final annular treatment chamber and the cyclone separator is provided on the side wall of the reaction tank, a lifting bracket is provided at the bottom of the reaction tank, a first positioning clamping plate and a second positioning clamping plate are respectively provided on the bottom surfaces of the primary annular treatment chamber, each transition annular treatment chamber and the final annular treatment chamber, the aeration pipeline is clamped between the first positioning clamping plate and the bottom surface of the reaction tank, and the heating component is clamped between the second positioning clamping plate and the bottom surface of the reaction tank.

2. The autotrophic denitrification wastewater treatment equipment according to claim 1, characterized in that: The directions of the primary overflow channel and the transition overflow channel connected to the primary annular processing chamber are opposite, the directions of the two transition overflow channels connected to the same transition annular processing chamber are opposite, and the directions of the transition overflow channel and the final overflow channel connected to the same transition annular processing chamber are opposite.

3. The autotrophic denitrification wastewater treatment equipment according to claim 1 is characterized in that: The first-stage annular processing chamber, each transition annular processing chamber and the final-stage annular processing chamber have the same inner height.

4. The autotrophic denitrification wastewater treatment equipment according to claim 1, characterized in that: The tops of the primary annular processing chamber, each transition annular processing chamber and the final annular processing chamber are all provided with an annular insulation pressure cover, the upper surface of the annular insulation pressure cover is provided with a manhole cover and a small insulation cover, and the inner side of the small insulation cover is provided with a temperature enhancement element for inserting into the corresponding primary annular processing chamber, each transition annular processing chamber or the final annular processing chamber.

5. The autotrophic denitrification wastewater treatment equipment according to claim 1, characterized in that: A walking ladder is arranged on the side of the reaction tank.

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