Integrated denitrification reactor

Abstract

The utility model discloses an integrated denitrification reactor relates to water treatment technical field, and the inside cylinder and aeration subassembly are included to the outer tank body, the big mouth cylinder body of greater inside diameter is set on the outer tank body upper end outside, and the both are connected through the conical tube, and the inside and the outer tank body outside wall jointly form the sedimentation zone, a plurality of water passing holes are equipped with in the sedimentation zone lower end periphery, and the inside of outer tank body is communicated, and the sewage mixed solution can pass, and the settled sludge can pass the water passing hole and return to the inside of outer tank body, and the supernatant can be discharged, the inside cylinder is coaxially fixed in the outer tank body, has the inside cylinder upper opening and lower opening, and the inside is the oxygen zone, and the annular space between the outside and the outer tank body is the anoxic zone, in the vertical direction, the inside cylinder upper opening is higher than the water passing hole and is lower than the outer tank body upper end, and the inside cylinder lower opening is higher than the inner bottom of outer tank body, and the wastewater for processing is passed in, the aeration subassembly is located the inside cylinder inner bottom, can inject oxygen to the inside cylinder. It can shorten the construction period, simplify the construction process, reduce the floor area, and improve the denitrification efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to an integrated denitrification reactor. Background Technology

[0002] In the field of industrial wastewater treatment, with the continuous tightening of nitrogen emission standards and the increasingly urgent need for industrial enterprises to upgrade, renovate, expand and build new facilities, traditional denitrification technologies are facing many insurmountable bottlenecks and can no longer fully meet the current demand for efficient, energy-saving and compact treatment.

[0003] Based on actual surveys and industry experience, there are many situations at industrial wastewater treatment sites that require upgrading, expansion, or new construction. Building new concrete water tanks involves complicated procedures, long construction periods, and complex construction processes. Utility Model Content

[0004] The purpose of this invention is to provide an integrated denitrification reactor to solve the problems existing in the prior art, shorten the construction period, simplify the construction process, reduce the land area, and improve the denitrification efficiency.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides an integrated denitrification reactor, including an outer tank, an inner cylinder, and an aeration assembly. A large-diameter cylinder is fitted around the upper end of the outer tank, the inner diameter of which is larger than the outer diameter of the outer tank. The large-diameter cylinder is connected to the outer wall of the outer tank via a conical tube. A sedimentation zone is formed between the large-diameter cylinder, the conical tube, and the outer wall of the outer tank. Multiple water passages are circumferentially arranged at the lower end of the sedimentation zone, each communicating with the interior of the outer tank. The wastewater mixture inside the outer tank can enter the sedimentation zone through the water passages, and the settled sludge in the sedimentation zone can... The supernatant from the sedimentation zone can be discharged from above the sedimentation zone, and the supernatant flows back to the outer tank through each of the aforementioned water passages. The inner cylinder is coaxially fixed inside the outer tank. The inner cylinder has an upper opening and a lower opening. An aerobic zone is formed inside the inner cylinder. An anoxic zone is formed in the circumferential space between the outer side of the inner cylinder and the inner side of the outer tank. In the vertical direction, the upper opening of the inner cylinder is higher than the water passages and lower than the upper end of the outer tank. The lower opening of the inner cylinder is higher than the inner bottom of the outer tank. The lower opening of the inner cylinder is used to introduce wastewater to be treated. The aeration component is located at the bottom of the inner cylinder; the aeration component is capable of injecting oxygen into the inner cylinder.

[0006] Preferably, a water inlet distributor is fixedly installed inside the outer tank. The inlet of the water inlet distributor is used to introduce wastewater to be treated, and the outlet of the water inlet distributor is located directly below the lower opening of the inner cylinder of the inner cylinder.

[0007] Preferably, an annular water collection trough is fixedly provided on the inner side wall of the large-mouth cylinder; the upper end of the large-mouth cylinder is flush with the upper end of the outer tank and is higher than the upper opening of the inner cylinder of the inner cylinder; the upper end of the annular water collection trough is higher than the upper opening of the inner cylinder of the inner cylinder.

[0008] Preferably, the outer tank can be inoculated with anaerobic ammonia-oxidizing bacteria for carrying out anaerobic ammonia oxidation reactions.

[0009] Preferably, the aeration assembly includes an extension pipe, an aeration main pipe, and multiple aeration branch pipes; the extension pipe is fixedly disposed within the inner cylinder; the lower end of the extension pipe is connected to the aeration main pipe, and each of the aeration branch pipes is fixedly disposed on the aeration main pipe and is connected to the aeration main pipe; each of the aeration branch pipes is provided with an aerator for blowing air into the inner cylinder.

[0010] The present invention achieves the following technical advantages over the prior art: The integrated denitrification reactor provided by this utility model features a prefabricated integrated structure, eliminating the need for multiple independent concrete structures on-site. The only on-site concrete work required is the construction of the equipment foundation. The entire reactor can be prefabricated in the factory, requiring only hoisting and simple pipeline installation on-site. This significantly simplifies the construction process, shortens the construction cycle, and avoids the cumbersome approval and construction procedures of traditional concrete tanks. The outer tank and inner cylinder are coaxially assembled to form an integrated main body. The interior of the inner cylinder constitutes an aerobic zone, while the circumferential space between the exterior of the inner cylinder and the interior of the outer tank constitutes an anoxic zone. The entire reaction alternates between the anoxic and aerobic zones. There is no need to build separate aerobic and anoxic tanks. Furthermore, the upper exterior of the outer tank, through a large-mouthed cylinder, a conical pipe, and the outer wall of the outer tank, forms a sedimentation zone, eliminating the need for an additional independent sedimentation tank and significantly reducing the footprint, thus achieving a compact treatment system. The aeration components are located at the bottom of the inner cylinder. When oxygen is injected into the aerobic zone, the aeration components serve two purposes: first, to provide dissolved oxygen to the reactor, enabling the degradation of organic matter and the conversion of ammonia nitrogen within the aerobic zone. Ammonia nitrogen can undergo short-range nitrification to produce nitrite nitrogen, or it can continue to react to produce nitrate nitrogen; second, to provide power for the internal circulation flow, i.e., achieving circulation through airlift. Wastewater inside the inner cylinder flows upwards, overflows through the opening at the top, and then circulates downwards along the anoxic zone, where denitrification removes total nitrogen. This creates an alternating aerobic and anoxic water flow environment, achieving simultaneous nitrification and denitrification, thus improving nitrogen removal efficiency. Some water flows to the sedimentation zone through multiple circumferential water passages at the bottom, where solid-liquid separation occurs, and sludge is returned to the outer tank, while clarified wastewater continues to rise and be discharged. Wastewater in the anoxic zone mixes thoroughly with the incoming wastewater due to air-lift circulation and continues to rise within the inner cylinder. The entire process requires no additional mechanical equipment, is highly integrated, and extremely simplified. Within the reactor, anoxic, aerobic, and sedimentation zones coexist. No mechanical equipment, such as nitrification liquid return pumps, is required; the aeration components alone create an internal circulation, allowing wastewater to flow alternately through the aerobic and anoxic zones, achieving simultaneous nitrification and denitrification. Furthermore, no sludge return pumps are needed; the sedimentation zone is integrated into the upper part of the outer tank, and sludge return is achieved solely through gravity and the inclined inner wall of the conical tube. Through airlift circulation, thorough mixing of wastewater within the reactor is achieved with low energy consumption, improving removal efficiency and shock resistance. The overall structure and construction are simplified. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of the integrated denitrification reactor provided by this utility model; Figure 2 A top view of the aeration component inside the inner cylinder of the integrated denitrification reactor provided by this utility model.

[0013] In the picture: 1-Outer tank; 101-Large-mouth cylindrical body; 102-Conical tube; 103-Water passage hole; 104-Sedimentation zone; 105-Oxygen-deficient zone; 2-Inner cylinder; 201-Aerobic zone; 3-Aeration assembly; 301-Extension pipe; 302-Main aeration pipe; 303-Aeration branch pipe; 4-Water inlet distributor; 5- Circular water collection trough. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] The purpose of this invention is to provide an integrated denitrification reactor to solve the problems existing in the prior art, shorten the construction period, simplify the construction process, reduce the land area, and improve the denitrification efficiency.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1 This embodiment provides an integrated denitrification reactor, including an outer tank 1, an inner cylinder 2, and an aeration assembly 3. A large-diameter cylinder 101 is fitted around the upper end of the outer tank 1. The inner diameter of the large-diameter cylinder 101 is larger than the outer diameter of the outer tank 1, and the large-diameter cylinder 101 is connected to the outer wall of the outer tank 1 via a conical tube 102. A sedimentation zone 104 is formed between the large-diameter cylinder 101, the interior of the conical tube 102, and the outer wall of the outer tank 1. Multiple water passages 103 are circumferentially arranged at the lower end of the sedimentation zone 104, and each water passage 103 communicates with the interior of the outer tank 1. The wastewater mixture inside the outer tank 1 can enter the sedimentation zone 104 through each water passage 103, and the settled sludge in the sedimentation zone 104 can flow back to the interior of the outer tank 1 through each water passage 103 (sliding down the inclined inner wall of the conical tube 102 based on the sludge's own gravity). Each water passage 103, and the supernatant in the sedimentation zone 104 can be discharged from the top of the sedimentation zone 104 (specifically, it enters the annular water collection tank 5 and is discharged from the annular water collection tank 5); the inner cylinder 2 is coaxially fixed inside the outer tank 1; the inner cylinder 2 has an upper opening and a lower opening; and an aerobic zone 201 is formed inside the inner cylinder 2; the circumferential space between the outside of the inner cylinder 2 and the inside of the outer tank 1 forms an anoxic zone 105; in the vertical direction, the upper opening of the inner cylinder 2 is higher than the water passage 103 and lower than the upper end of the outer tank 1, the lower opening of the inner cylinder 2 is higher than the inner bottom of the outer tank 1, and the lower opening of the inner cylinder 2 is used to introduce wastewater to be treated; the aeration component 3 is located at the inner bottom of the inner cylinder 2; the aeration component 3 can inject oxygen into the inner cylinder 2.

[0018] By designing the entire structure as a prefabricated integrated structure, the construction of multiple independent concrete structures on-site is eliminated. Only the equipment foundation needs to be newly built on-site. The entire structure can be prefabricated in the factory, requiring only hoisting and simple pipeline installation on-site. This significantly simplifies the construction process, shortens the construction cycle, and avoids the cumbersome approval and construction procedures of traditional concrete water tanks. Specifically, the outer tank 1 and inner cylinder 2 are coaxially assembled to form an integrated main body. The interior of the inner cylinder 2 constitutes the aerobic zone 201, and the circumferential space between the exterior of the inner cylinder 2 and the interior of the outer tank 1 constitutes the anoxic zone 105. The entire reaction alternates between the anoxic zone 105 and the aerobic zone 201, eliminating the need for separate aerobic and anoxic tanks. The upper exterior of the outer tank 1, through the large-mouth cylinder 101 and the conical pipe 102, together with the outer wall of the outer tank 1, forms a sedimentation zone 104. This eliminates the need for a separate sedimentation tank, significantly reducing the footprint and achieving a compact treatment system. The aeration component 3 is located at the bottom of the inner cylinder 2. When oxygen is injected into the aerobic zone 201, the aeration component 3 serves two purposes: first, to provide dissolved oxygen to the reactor, enabling the degradation of organic matter and the conversion of ammonia nitrogen within the aerobic zone 201. Ammonia nitrogen can undergo short-range nitrification to produce nitrite nitrogen, or it can continue to react to produce nitrate nitrogen; second, to provide power for the internal circulation flow, i.e., to achieve circulation through airlift, driving the wastewater in the inner cylinder 2 upwards. The water flows out through the opening at the top of the inner cylinder and then circulates downwards along the anoxic zone 105, where denitrification removes total nitrogen. This creates an alternating aerobic and anoxic water flow environment, achieving simultaneous nitrification and denitrification, thus improving nitrogen removal efficiency. Some water flows from multiple circumferential water passages 103 at the lower end of the sedimentation zone 104 to the sedimentation zone 104. After solid-liquid separation, the sludge flows back to the outer tank 1, while the clarified wastewater continues to rise and be discharged. The wastewater in the anoxic zone 105 mixes thoroughly with the incoming wastewater due to air-lift circulation and continues to rise within the inner cylinder 2. The entire process requires no additional mechanical equipment, is highly integrated, and extremely simplified. Within the reactor... Simultaneously, there are anoxic zone 105, aerobic zone 201, and sedimentation zone 104. No mechanical equipment, such as a nitrification liquid return pump, is required; the aeration component 3 alone can form an internal circulation, achieving alternating circulation of wastewater through aerobic zone 201 and anoxic zone 105, thus realizing simultaneous nitrification and denitrification. Furthermore, no sludge return pump or other mechanical equipment is needed; sedimentation zone 104 is integrated into the upper part of the outer tank 1, and sludge return is achieved solely through gravity and the inclined inner wall of the conical tube 102. Through airlift circulation, thorough mixing of wastewater within the reactor can be achieved with low energy consumption, improving removal efficiency and shock resistance. The overall structure and construction are simplified.

[0019] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1As shown, a water inlet distributor 4 is fixedly installed inside the outer tank 1. The inlet of the water inlet distributor 4 is used to introduce the wastewater to be treated, and the outlet of the water inlet distributor 4 is located directly below the lower opening of the inner cylinder of the inner cylinder 2.

[0020] Specifically, the design of the water inlet distributor 4 should maximize the uniformity of water distribution throughout the entire reactor.

[0021] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 As shown, an annular water collection trough 5 is fixedly installed on the inner wall of the large-mouth cylinder 101 (qualified water is discharged through the annular water collection trough 5); the upper end of the large-mouth cylinder 101 is flush with the upper end of the outer tank 1, and both are higher than the upper opening of the inner cylinder of the inner cylinder 2; the upper end of the annular water collection trough 5 is higher than the upper opening of the inner cylinder of the inner cylinder 2.

[0022] In the optional embodiments of this example, a preferred option is that the outer tank 1 can be inoculated with anaerobic ammonia oxidation bacteria for carrying out the anaerobic ammonia oxidation reaction. This allows the nitrification / denitrification reaction inside the reactor to be carried out simultaneously with the anaerobic ammonia oxidation process, thereby reducing aeration energy consumption and carbon source dosage.

[0023] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 2 As shown, the aeration assembly 3 includes an extension pipe 301, an aeration main pipe 302, and multiple aeration branch pipes 303; the extension pipe 301 is fixedly installed inside the inner cylinder 2; the lower end of the extension pipe 301 is connected to the aeration main pipe 302, and each aeration branch pipe 303 is fixedly installed on the aeration main pipe 302 and is connected to the aeration main pipe 302; each aeration branch pipe 303 is provided with an aerator for blowing air into the inner cylinder 2.

[0024] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An integrated denitrification reactor, characterized in that: Includes the outer tank, inner cylinder, and aeration components; The upper end of the outer tank is fitted with a large-mouth cylindrical body, the inner diameter of which is larger than the outer diameter of the outer tank. The large-mouth cylindrical body is connected to the outer wall of the outer tank via a tapered tube. The large-mouth cylindrical body, the interior of the tapered tube, and the outer wall of the outer tank together form a sedimentation zone. The lower end of the sedimentation zone is provided with multiple water passage holes, each of which communicates with the interior of the outer tank. The wastewater mixture inside the outer tank can enter the sedimentation zone through each of the water passage holes, and the settled sludge in the sedimentation zone can flow back to the interior of the outer tank through each of the water passage holes. The supernatant in the sedimentation zone can be discharged from the top of the sedimentation zone. The inner cylinder is coaxially fixed inside the outer tank; the inner cylinder has an upper opening and a lower opening; and an aerobic zone is formed inside the inner cylinder; the circumferential space between the outside of the inner cylinder and the inside of the outer tank forms an oxygen-deficient zone. In the vertical direction, the upper opening of the inner cylinder of the inner cylinder is higher than the water passage hole and lower than the upper end of the outer tank. The lower opening of the inner cylinder of the inner cylinder is higher than the inner bottom of the outer tank. The lower opening of the inner cylinder of the inner cylinder is used to introduce wastewater to be treated. The aeration component is located at the bottom of the inner cylinder; the aeration component is capable of injecting oxygen into the inner cylinder.

2. The integrated denitrification reactor according to claim 1, characterized in that: A water inlet distributor is fixedly installed inside the outer tank. The inlet of the water inlet distributor is used to introduce wastewater to be treated, and the outlet of the water inlet distributor is located directly below the lower opening of the inner cylinder of the inner cylinder.

3. The integrated denitrification reactor according to claim 1, characterized in that: An annular water collection trough is fixedly installed on the inner wall of the large-mouth cylinder. The upper end of the large-mouth cylinder is flush with the upper end of the outer tank, and both are higher than the upper opening of the inner cylinder of the inner cylinder. The upper end of the annular water collection trough is higher than the opening on the inner cylinder of the inner cylinder body.

4. The integrated denitrification reactor according to claim 1, characterized in that: The outer tank can be inoculated with anaerobic ammonia-oxidizing bacteria for carrying out anaerobic ammonia oxidation reactions.

5. The integrated denitrification reactor according to claim 1, characterized in that: The aeration assembly includes an extension pipe, a main aeration pipe, and multiple aeration branch pipes; The extension pipe is fixedly installed inside the inner cylinder; the lower end of the extension pipe is connected to the main aeration pipe, and each of the aeration branch pipes is fixedly installed on the main aeration pipe and is connected to the main aeration pipe. Each of the aeration branch pipes is equipped with an aerator for blowing air into the inner cylinder.

Images