Multistage layered treatment device
By designing a multi-stage stratified treatment device, the problems of microbial loss and high carbon source consumption in traditional processes are solved, achieving efficient wastewater denitrification, reducing operating costs and carbon source usage, and adapting to the needs of various carbon sources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-22
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional multi-stage nitrification/denitrification combined processes suffer from severe microbial loss, resulting in high carbon source consumption and inconvenience in adding carbon sources, which increases wastewater treatment costs.
The system employs a multi-stage, stratified treatment device, including a pretreatment intermediate water tank, a carbon source dosing device, an aeration blower, a denitrification tower, and a multi-stage denitrification tank. Through sludge thickening and an online dosing system, it increases the concentration of microorganisms, expands the range of carbon sources, optimizes reaction conditions, and reduces the redox potential, thereby achieving the dual effects of denitrification and hydrolysis.
It improves microbial utilization efficiency, reduces carbon source consumption, and lowers operating costs. At the same time, it improves denitrification efficiency and water quality adaptability, is suitable for the use of multiple carbon sources, and reduces dependence on traditional carbon sources.
Smart Images
Figure CN224047199U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sewage treatment technical field, concretely is a multistage layered treatment device. BACKGROUND
[0002] The governance of nitrogen pollution is still one of the important indicators of water pollution source control in China, and the nitrogen and phosphorus pollution in water mainly comes from the excessive use of agricultural fertilizers, the discharge of industrial wastewater and the improper treatment of urban sewage, etc. After these nitrogen and phosphorus substances enter the water, they will promote the overpopulation of algae and other aquatic organisms, leading to water eutrophication, which not only destroys the ecological balance of water, but also affects water quality safety, and even causes "water bloom" phenomenon in severe cases, causing great losses to fisheries, tourism and other industries.
[0003] And the traditional multistage nitrification / denitrification combined process, the microorganism reduces along with the flow of sewage, needs to add microorganism constantly, because of high energy consumption, large consumption of carbon source (usually glucose, sodium acetate, methanol industrial product), large investment in sewage treatment, which makes many industrial enterprises headache.
[0004] Based on this, a multistage layered treatment device is now provided, which can eliminate the drawbacks of existing devices. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a multistage layered treatment device to solve the problem of large consumption of glucose, sodium acetate and methanol industrial product and inconvenient carbon source addition in the background art.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0007] A multistage layered treatment device, comprising a pretreatment intermediate water pool, a carbon source dosing device and an aeration blower, the outlet pipe of the pretreatment intermediate water pool is connected with a denitrification tower water inlet lifting pump through a conduit, the output end of the denitrification tower water inlet lifting pump is connected with a denitrification tower body through a conduit, the outlet pipe of the denitrification tower body is connected with an intermediate sludge concentration tank through a conduit, the discharge pipe of the intermediate sludge concentration tank is connected with a denitrification tower circulating pump through a conduit, and the output end of the denitrification tower circulating pump is connected with the denitrification tower body through a conduit.
[0008] On the basis of the above technical scheme, the utility model also provides the following optional technical scheme:
[0009] In an optional scheme, one side of the pretreatment intermediate water pool is connected with four first conveying pumps through four conduits respectively, and the output ends of the four first conveying pumps are connected with an acid dosing device, a reducing agent dosing device, a trace element dosing device and a phosphorus source dosing device through conduits respectively.
[0010] In an alternative: one side of the intermediate sludge concentration tank is provided with nine denitrification tanks in turn.
[0011] In an alternative: one side of one of the denitrification tanks is provided with four aerobic aeration tanks in turn.
[0012] In an alternative: the effluent pipe of the carbon source dosing device is connected with a second conveying pump through a conduit, the output end of the second conveying pump is connected with the denitrification tower body, the nine denitrification tanks and the four aerobic aeration tanks through conduits respectively, and valves are arranged at the branch pipes.
[0013] In an alternative: the interiors of the nine denitrification tanks are fixedly installed with stirrers and cyclone aerators, and the interiors of the four aerobic aeration tanks are fixedly installed with aeration discs.
[0014] In an alternative: the output end of the aeration blower is connected with the cyclone aerators and the aeration discs through conduits.
[0015] In an alternative: one side of one of the aerobic aeration tanks is provided with a nitrification liquid lifting well, the discharge pipe of the nitrification liquid lifting well is connected with a nitrification liquid reflux pump through a conduit, the output end of the nitrification liquid reflux pump is connected with the nine denitrification tanks and the four aerobic aeration tanks through conduits respectively, and valves are arranged at the branch pipes.
[0016] Compared with the prior art, the utility model has the advantages that:
[0017] 1、The utility model discloses a denitrification tower body cooperates with an intermediate sludge concentration tank, improves the microbial concentration of the denitrification reaction tower, reduces the internal oxidation -reduction potential of the reactor (-200~-150mv) simultaneously, makes the reactor reach the double effect of denitrification and hydrolysis, improves the utilization efficiency of carbon source of denitrification microorganism, and the selection range of microorganism to denitrification carbon source (traditional carbon source is food -grade glucose, industrial methanol, industrial sodium acetate) can be expanded by hydrolysis acidification, and multiple carbon chain carbon source (chemical by -product) can be used, and the operation cost is reduced.
[0018] 2、The utility model discloses that the acid dosing device, the reducing agent dosing device, the trace element dosing device and the phosphorus source dosing device are dosed to the inside of the pretreatment intermediate pool, the water quality in the inside of the pretreatment intermediate pool is more suitable for the reproduction of microorganism, thereby effectively increasing the efficiency of denitrification, the acid dosing device is also connected with the denitrification tower body, the denitrification tank and the aerobic aeration tank, and the on -line pH meter controls the work of the acid dosing device, and the internal acidity and alkalinity are effectively controlled. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the whole structure schematic view of the utility model.
[0020] Figure 2 The utility model discloses a pretreatment intermediate pool structure schematic view.
[0021] Figure 3 The utility model discloses an intermediate sludge concentration tank structure schematic view.
[0022] The figure mark note: 1, pretreatment intermediate pool, 2, denitrification tower main part, 3, intermediate sludge concentration tank, 4, denitrification tank, 5, aerobic aeration tank, 6, first delivery pump, 7, carbon source dosing device, 8, acid dosing device, 9, reducing agent dosing device, 10, trace element dosing device, 11, phosphorus source dosing device, 12, denitrification tower water lifting pump, 13, denitrification tower circulating pump, 14, mixer, 15, cyclone aerator, 16, aeration disc, 17, nitration liquid backflow pump, 18, second delivery pump, 19, aeration blower, 20, nitration liquid lifting well. DETAILED DESCRIPTION
[0023] In order to make the utility model purposes, technical scheme and advantages more clearly, following combining with the drawing and example, the utility model carries out further detailed explanation.
[0024] In one embodiment, as shown in Figures 1-3 A multistage layered treatment device includes a pretreatment intermediate pool 1, a carbon source dosing device 7 and an aeration blower 19, the water outlet pipe of the pretreatment intermediate pool 1 is connected with a denitrification tower water lifting pump 12 through a pipeline, the output end of the denitrification tower water lifting pump 12 is connected with a denitrification tower main part 2 through a pipeline, the water outlet pipe of the denitrification tower main part 2 is connected with an intermediate sludge concentration tank 3 through a pipeline, the discharge pipe of the intermediate sludge concentration tank 3 is connected with a denitrification tower circulating pump 13 through a pipeline, and the output end of the denitrification tower circulating pump 13 is connected with the denitrification tower main part 2 through a pipeline.
[0025] In this embodiment, a large number of microorganisms are needed to participate in the process of denitrification, and the microorganisms are mostly attached to the inside of sludge. In the process of denitrification, sewage flows continuously, causing the sludge in the denitrification tower main part 2 to decrease continuously. The sludge enters the inside of the intermediate sludge concentration tank 3 and is precipitated. The sludge in the intermediate sludge concentration tank 3 is transported back to the inside of the denitrification tower main part 2 through the work of the denitrification tower circulating pump 13, thereby improving the concentration of microorganisms in the inside of the denitrification tower main part 2. The denitrification tower main part 2 cooperates with the intermediate sludge concentration tank 3 to improve the concentration of microorganisms in the denitrification reaction tower and reduce the internal oxidation-reduction potential (-200~-150mv) of the reactor, so that the reactor achieves the dual effects of denitrification and hydrolysis, improves the utilization efficiency of carbon source by denitrification microorganisms, and expands the selection range of microorganisms for denitrification carbon source (traditional carbon sources are food-grade glucose, industrial methanol and industrial sodium acetate). A multi-carbon-chain carbon source (a chemical by-product) can be used, and the operation cost is reduced.
[0026] In one embodiment, as shown in Figure 1 and Figure 2 The side of the pre-treatment intermediate tank 1 is connected with four first conveying pumps 6 through four pipes respectively, the output ends of the four first conveying pumps 6 are connected with acid dosing device 8, reducing agent dosing device 9, trace element dosing device 10 and phosphorus source dosing device 11 through pipes respectively, the inside of the pre-treatment intermediate tank 1 is dosed through the acid dosing device 8, reducing agent dosing device 9, trace element dosing device 10 and phosphorus source dosing device 11, so that the water quality inside the pre-treatment intermediate tank 1 is more suitable for microbial reproduction, thereby effectively increasing the efficiency of denitrification, the acid dosing device 8 is also connected with the denitrification tower body 2, denitrification tank 4 and aerobic aeration tank 5, the on-line pH meter controls the operation of the acid dosing device 8, and the internal pH value is effectively controlled.
[0027] In one embodiment, as shown in Figure 1 and Figure 3 The side of the intermediate sludge concentration tank 3 is provided with nine denitrification tanks 4 in sequence, one side of one of the denitrification tanks 4 is provided with four aerobic aeration tanks 5 in sequence, the intermediate sludge concentration tank 3 is connected with multi-stage plug flow denitrification tank 4, according to the total nitrogen concentration and the composition of the refractory organic matter in the incoming water, 1-9 stages can be set, the principle of exponential decrease of pollutants is used, the reaction power is enhanced, the multi-stage series is beneficial to maintain the ORP (oxidation-reduction potential) condition of microbial denitrification, the carbon source utilization rate is strengthened, and according to the carbon source molecular chain length and the microbial utilization efficiency, the oxidation-reduction potential of the single-cell reaction tank can be reasonably adjusted, so that the reaction tank is in the switching state of denitrification and hydrolysis, and ORP meters and pH meters are arranged between the multi-stage denitrification tanks 4 to monitor the changes of the oxidation-reduction potential and the pH value in the denitrification process in real time.
[0028] In one embodiment, as shown in Figure 1 and Figure 3 The outlet pipe of the carbon source dosing device 7 is connected with a second conveying pump 18 through a pipe, the output end of the second conveying pump 18 is connected with the denitrification tower body 2, nine denitrification tanks 4 and four aerobic aeration tanks 5 through pipes respectively, and valves, a carbon source dosing amount automatic control system, a carbon source dosing device and a carbon source dosing device are arranged at each branch pipe, a liquid level control supplement is arranged, a low liquid level alarm device is arranged in the storage tank to remind the carbon source to be supplemented in time, the dosing amount is adjusted according to the ORP value and the denitrification denitrification agent dosing amount formula (parameters), that is, 1 kg TN=4.1 kg carbon source (the parameters can be set), the carbon source is dosed in the three-stage and eight-stage denitrification tanks, and in addition to being controlled by the dosing formula, it is also controlled by the ORP value, the PLC system calculates the hourly carbon source dosing amount according to the daily on-line monitoring total nitrogen removal amount ΔTN=Qinlet* (TNin-TNout), and the on-line ORP (oxidation-reduction potential meter) arranged in the denitrification tank is used to accurately control the dosing amount.
[0029] In one embodiment, as shown in Figure 1 and Figure 3 , the inside of the nine denitrification tanks 4 is fixedly installed with a stirrer 14 and a cyclone aerator 15, the inside of the four aerobic aeration tanks 5 is fixedly installed with an aeration disc 16, the output end of the aeration blower 19 is connected with the cyclone aerator 15 and the aeration disc 16 through a conduit respectively, alkalinity accumulation will occur in the denitrification process, the cyclone aerator 15 installed in the multi-stage denitrification tank 4 plays a role of aeration and stirring, and small molecule acid accumulated in the denitrification process is blown away, the multi-stage denitrification tank 4 is provided with an acid feeding pipeline at intervals, an on-line pH meter controls the start and stop of an acid feeding pump, the pH of the denitrification tank 4 is controlled, and the acid feeding adjusts auxiliary aeration and stirring, which can effectively reduce the amount of acid feeding for pH adjustment in the denitrification process.
[0030] In one embodiment, as shown in Figure 1 and Figure 3 Figure 1 Figure 3 , one side of the aerobic aeration tank 5 is provided with a nitrification liquid lifting well 20, the discharge pipe of the nitrification liquid lifting well 20 is connected with a nitrification liquid backflow pump 17 through a conduit, the output end of the nitrification liquid backflow pump 17 is connected with the nine denitrification tanks 4 and the four aerobic aeration tanks 5 through conduits respectively, and a valve is arranged at each branch pipe, and microorganisms are also needed in the denitrification process of the denitrification tank 4 and the aerobic aeration tank 5, sludge flows into the inside of the nitrification liquid lifting well 20 and is deposited, the nitrification liquid backflow pump 17 works, and sludge is transported to the corresponding denitrification tank 4 and aerobic aeration tank 5 according to the demand, so that the use amount of microorganisms is reduced.
[0031] The above embodiment discloses a multi-stage hierarchical treatment device, wherein the water quality in the pretreatment intermediate tank 1 is more suitable for microbial reproduction by adding chemicals through the acid adding device 8, the reducing agent adding device 9, the trace element adding device 10, and the phosphorus source adding device 11, thereby effectively increasing the efficiency of denitrification. A large number of microorganisms are needed to participate in the process of denitrification, and most of the microorganisms are attached to the sludge. In the process of denitrification, the sewage flows continuously, causing the sludge in the denitrification tower main body 2 to decrease continuously. The sludge enters the intermediate sludge concentration tank 3 and is precipitated. The sludge in the intermediate sludge concentration tank 3 is transported back to the inside of the denitrification tower main body 2 by the denitrification tower circulating pump 13, thereby increasing the concentration of microorganisms in the denitrification tower main body 2 and improving the microbial concentration of the denitrification reaction tower. At the same time, the internal oxidation-reduction potential of the reactor is reduced (-200~ -150mv), so that the reactor achieves the dual effects of denitrification and hydrolysis, improves the utilization efficiency of carbon source by denitrification microorganisms, and can expand the selection range of microorganisms for denitrification carbon source (traditional carbon sources are food-grade glucose, industrial methanol, and industrial sodium acetate). A multi-carbon chain carbon source (chemical by-product) can be used to reduce operating costs. According to the total nitrogen concentration of the incoming water and the composition of the refractory organic matter, 1~9 stages can be set. The principle of exponential decrease of pollutants is used to enhance the reaction dynamics. The multi-stage series connection is beneficial to maintaining the ORP (oxidation-reduction potential) conditions of microbial denitrification and denitrification, strengthening the carbon source utilization rate, and reasonably adjusting the oxidation-reduction potential of the single-cell reaction tank according to the carbon source molecular chain length and microbial utilization efficiency. The reaction tank is in the switching state of denitrification and hydrolysis. ORP meters and pH meters are arranged between the multi-stage denitrification and denitrification tanks 4 to monitor the changes of oxidation-reduction potential and pH in the denitrification process in real time.
[0032] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A multi-stage layered treatment device comprising a pre-treatment intermediate pool (1), a carbon source dosing device (7) and an aeration blower (19), characterized in that, The outlet pipe of the pretreatment intermediate water pool (1) is connected with a denitrification tower water inlet lifting pump (12) through a pipeline, the output end of the denitrification tower water inlet lifting pump (12) is connected with a denitrification tower body (2) through a pipeline, the outlet pipe of the denitrification tower body (2) is connected with an intermediate sludge concentration tank (3) through a pipeline, the discharge pipe of the intermediate sludge concentration tank (3) is connected with a denitrification tower circulating pump (13) through a pipeline, and the output end of the denitrification tower circulating pump (13) is connected with the denitrification tower body (2) through a pipeline.
2. A multi-stage processing apparatus according to claim 1, wherein One side of the pretreatment intermediate water pool (1) is connected with four first conveying pumps (6) through four pipelines respectively, the output ends of the four first conveying pumps (6) are connected with an acid dosing device (8), a reducing agent dosing device (9), a trace element dosing device (10) and a phosphorus source dosing device (11) through pipelines respectively.
3. The multi-stage processing apparatus of claim 1, wherein One side of the intermediate sludge concentration tank (3) is provided with nine denitrification tanks (4) in sequence.
4. A multi-stage processing apparatus according to claim 3, wherein One side of one of the denitrification tanks (4) is provided with four aerobic aeration tanks (5) in sequence.
5. A multi-stage processing apparatus according to claim 4, wherein The outlet pipe of the carbon source dosing device (7) is connected with a second conveying pump (18) through a pipeline, the output end of the second conveying pump (18) is connected with the denitrification tower body (2), the nine denitrification tanks (4) and the four aerobic aeration tanks (5) through pipelines respectively, and valves are arranged at each branch pipe.
6. A multi-stage processing apparatus according to claim 4, wherein The interiors of the nine denitrification tanks (4) are fixedly installed with agitators (14) and cyclone aerators (15), and the interiors of the four aerobic aeration tanks (5) are fixedly installed with aeration discs (16).
7. A multi-stage processing apparatus according to claim 6, wherein The output end of the aeration blower (19) is connected with the cyclone aerators (15) and the aeration discs (16) through pipelines respectively.
8. The multi-stage processing apparatus of claim 4, wherein One side of one of the aerobic aeration tanks (5) is provided with a nitrification liquid lifting well (20), the discharge pipe of the nitrification liquid lifting well (20) is connected with a nitrification liquid backflow pump (17) through a pipeline, the output end of the nitrification liquid backflow pump (17) is connected with the nine denitrification tanks (4) and the four aerobic aeration tanks (5) through pipelines respectively, and valves are arranged at each branch pipe.