A river channel dosing and aeration integrated device

Abstract

The present invention relates to the technical field of black and smelly river channel restoration and environmental protection equipment, and in particular to an integrated river channel dosing and aeration device. The device has a simple structure, is easy to operate, and can realize an automatic dosing system; it is to solve the problems in the prior art such as poor mass transfer and mixing between the aerated gas-liquid mixture in the river channel and the unaerated low dissolved oxygen water body, narrow jet range, and low aeration efficiency; river channel dosing relies on manual spraying, and the agent is only loaded on the water surface, which is difficult to diffuse, affecting the agent treatment effect, causing waste of agent use, increasing agent costs, and may also cause secondary pollution to the water body. The device has the advantages of combining aeration and dosing to enhance the effect of improving river water quality; good spraying effect, wide application range, fast emergency response, no need for manual operation, and can realize automatic operation.

Description

Technical Field

[0001] The invention relates to the technical field of black and smelly river channel restoration and environmental protection equipment, and in particular to a river channel drug-adding and aeration integrated device. Background Art

[0002] With the development of the economy and society and the growth of urban population, a large amount of domestic sewage and industrial wastewater that has not been effectively treated is discharged into rivers, causing urban river pollution. Black, smelly and eutrophication are common phenomena in urban rivers. In recent years, with the advancement of ecological civilization construction, comprehensive urban river improvement projects such as sewage interception, dredging, revetment and water diversion have been fully launched, and the treatment of black and smelly rivers has achieved great results. However, due to the long-term existence of sudden river pollution, non-point source pollution and endogenous pollution, the water quality of urban rivers is mostly Class V or inferior to Class V, which is still a polluted water body and needs to be improved and maintained ecologically.

[0003] In the emergency response to sudden pollution incidents in rivers, water quality improvement and ecological maintenance projects, river aeration and spraying of ecological restoration agents are the most widely used technical measures. Generally, the agents used for river water purification are mainly microbial agents. On the one hand, microbial agents need to be sprayed evenly in rivers and fully mixed with river pollutants to play a role. On the other hand, dissolved oxygen is an electron acceptor for biochemical reactions. If the spraying process is combined with aeration, it will accelerate the reaction between the agent and pollutants, improve the reaction efficiency, quickly eliminate pollutants and achieve water purification.

[0004] The traditional method of adding chemicals to rivers is to use high-pressure water guns to spray and add chemicals manually, or to dump chemicals into water bodies in bags. This requires a lot of manpower, and the adding process must ensure the safety of personnel. It is difficult to respond quickly to emergencies. Manually adding chemicals only loads the water surface, and the chemicals and river water are unevenly mixed, making it difficult to effectively diffuse, which directly affects the treatment effect of the chemicals, causes waste of chemicals, increases the cost of chemicals, and may also cause secondary pollution to the water body. Therefore, traditional manual spraying of chemicals cannot achieve efficient, uniform, and rapid completion of river dosing operations. At present, river aeration mainly includes jet aeration, nano aeration, etc. These aeration equipments directly connect the outlet of the gas-liquid mixture to the river water body. Due to the fast flow rate of the gas-liquid mixture ejected from the outlet, the resistance in the river water body is large and it is difficult to diffuse, making it difficult for the high-dissolved oxygen jet water body and the low-dissolved oxygen water body in the river to effectively mix, the aeration efficiency is low, and the diffusion distance is limited. How to combine aeration and the addition of river chemicals, strengthen the mixing between gas-liquid mixed water, chemicals and low dissolved oxygen water in the river, increase the diffusion distance of the mixed liquid, and enhance the water purification effect, is of great significance to emergency response to sudden pollution incidents in rivers, water quality improvement and ecological maintenance projects. Summary of the invention

[0005] In the prior art, there are problems such as poor mass transfer and mixing between the aerated gas-liquid mixture in the river channel and the unaerated low dissolved oxygen water body, narrow jet range, and low aeration efficiency; the dosing of medicine in the river channel relies on manual spraying, and the medicine is only loaded on the water surface, which is difficult to diffuse, affecting the treatment effect of the medicine, causing waste of medicine use, increasing the cost of medicine, and may also cause secondary pollution to the water body. In order to solve the above problems, the purpose of the present invention is to provide an integrated river dosing and aeration device. The equipment has a simple structure, convenient operation, and can realize automatic dosing. The equipment combines aeration and dosing to enhance the purification effect of river water quality; it has the advantages of good spraying effect, wide application range, fast emergency response, no manual operation, and can realize automatic operation.

[0006] The river water is pumped into the onshore machine room by a submersible pump and enters the jet aerator. The jet aerator generates negative pressure, sucks in air from the air inlet, and achieves gas-liquid mixing in the jet aerator to form a gas-liquid mixed liquid. Driven by pressure, the gas-liquid mixture enters the push-flow dosing device located in the underwater river channel and is ejected from the jet nozzle of the push-flow dosing device in the river channel as an induced water flow, forming a negative pressure, sucking in the medicine liquid in the dosing tube and the traction water flow located behind the guide tube. The medicine and the traction water flow are mixed in the guide tube. The diameter of the guide tube is more than 10 times the diameter of the nozzle. The induced water flow, medicine liquid and traction water flow flow out of the guide tube, and the outflow water volume is 10-20 times the jet water volume. A large amount of low-speed outflowing water flows to pull the water body around the river channel to form a large-flow mixed circulation, so that the medicine liquid, high-dissolved oxygen water and low-dissolved oxygen water around the river channel are fully mixed in a large range through mass transfer, which solves the problems of low oxygenation efficiency in the river channel, high labor intensity, instability and uneven dosing of manual dosing, can quickly purify the water quality of the river channel and eliminate black and smelly water. It can be widely used in emergency treatment of sudden pollution incidents in the river channel, water quality improvement and ecological maintenance projects.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] The purpose of the present invention is to provide a river channel dosing and aeration integrated device, including a dosing system, a submersible pump, a river propulsion dosing device, and a jet aerator;

[0009] The river-propelled doser comprises a jet nozzle for feeding a gas-liquid mixture and a dosing pipe for feeding medicine. The river-propelled doser is also provided with an outlet.

[0010] The submersible pump is connected to a jet aerator, and the outlet of the jet aerator is connected to a jet nozzle of a river propulsion doser;

[0011] The dosing system is connected to the dosing pipe of the river propulsion doser.

[0012] In one embodiment of the present invention, the dosing system includes a dosing tank, a mixer and a dosing pump;

[0013] A stirrer and a dosing pump are arranged on the top of the dosing barrel, the stirring shaft of the stirrer is located inside the dosing barrel, the liquid inlet pipe of the dosing pump is located inside the dosing barrel, and the liquid outlet pipe of the dosing pump is connected to the dosing pipe of the river propulsion doser.

[0014] In one embodiment of the present invention, the jet aerator comprises a jet tube, one end of which is connected to the submersible pump through a pipeline, and the other end of which is an outlet, which is connected to the jet nozzle of the river propulsion doser through a pipeline.

[0015] An air inlet for air intake is arranged on the top of the jet tube.

[0016] In one embodiment of the present invention, the river propulsion doser is composed of a guide tube, a jet nozzle and a dosing tube;

[0017] The guide tube is provided with a jet nozzle for feeding a gas-liquid mixture and a dosing pipe for feeding medicine. Both ends of the guide tube are openings, both of which are outlets.

[0018] In one embodiment of the present invention, the jet nozzle is in an "L" shape and extends into the interior of the guide tube.

[0019] In one embodiment of the present invention, the diameter of the guide tube is more than 10 times the diameter of the jet nozzle.

[0020] In one embodiment of the present invention, the outlet of the jet nozzle is located on the axis of the guide tube.

[0021] In one embodiment of the present invention, the mixer, dosing pump, jet aerator, and submersible pump are also connected to a controller, and the controller is connected to a mobile phone APP for communication.

[0022] In one embodiment of the present invention, a machine room is arranged on the shore, and the dosing system and the jet aerator are arranged in the machine room.

[0023] In one embodiment of the present invention, a grid net is arranged underwater, and the submersible pump and the river propulsion dosing device are arranged inside the grid net.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) Combine river aeration and river drug addition, use the river flow to generate negative pressure and absorb the agent. River restoration agents are generally microbial preparations. River aeration increases the dissolved oxygen in the river water, provides electron acceptors for microbial oxidation and decomposition, and improves the biochemical reaction efficiency of the river water. Its water purification effect is much higher than that of single river aeration and agent addition, which is beneficial to emergency response to sudden pollution incidents in rivers and improvement of water quality and ecological maintenance in urban rivers.

[0026] (2) Conventional river aeration equipment directly connects the outlet of the gas-liquid mixed liquid to the river water body. Since the mixed liquid ejected from the outlet has a fast flow rate and a large resistance in the river water body, it is difficult to diffuse in a large range in the river, making it difficult to effectively mix the high-dissolved oxygen jet water body and the low-dissolved oxygen water body in the river, and the aeration efficiency is not high. The outlet of the equipment of the present invention is connected to a river flow doser, which is composed of a guide tube, a nozzle and a dosing port. The gas-liquid mixed liquid enters the underwater river flow doser under pressure and is ejected from the jet nozzle of the river flow doser as a guide water flow, forming a negative pressure and sucking the traction water flow behind the guide tube. The traction water flow is 10-20 times the flow rate of the guide water flow. A large amount of low-speed outflowing water flows the water body around the river, forming a large-flow mixed circulation, so that the high-dissolved oxygen water and the low-dissolved oxygen water around the river are fully mixed in a large range by mass transfer, greatly improving the river oxygenation efficiency.

[0027] (3) The reagent of the equipment of the present invention is automatically added from the dosing barrel in the machine room through a mechanical diaphragm dosing pump or by relying on the negative pressure of the river flow dosing device. The drug is directly added to the river flow dosing device from the dosing port, fully mixed with the traction water flow in the guide tube, and pushed out of the guide tube at a low speed together with the induced water flow. A large amount of low-speed outflowing water draws the water body around the river channel to form a large-flow mixed circulation, so that the reagent, high-dissolved oxygen water and low-dissolved oxygen water around the river channel are fully mixed in a large range by mass transfer, greatly improving the efficiency of the use of the reagent; the reagent can be evenly added with the flow of river water to avoid the intermittent nature of manual dosing; the reagent addition can be controlled by a mobile phone APP, or directly linked to indicators such as DO, so as to achieve a rapid response to sudden pollution events and avoid ecological disasters.

[0028] (4) The new equipment used in this application is composed of a dosing system, a jet system and a flow-pushing system. The dosing, jet-pushing and flow-pushing operations can all be automatically operated and controlled by a mobile phone APP, and can be unattended.

[0029] (5) The new equipment used in this invention has a simple structure, and each unit of the equipment is economical and reliable. It is easy to install and operate, and easy to maintain. It realizes automatic control of adding medicine and increasing oxygen, thereby improving work efficiency. It ensures the mixing effect of the medicine and dissolved oxygen, and the range of action of the medicine is large. It can save manpower and material resources and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is the integrated device for river channel dosing and aeration of the present invention;

[0031] Figure 2 It is a schematic diagram of a river channel flow-pushing dosing device in the river channel dosing and exposure integrated device of the present invention;

[0032] Numbers in the figure: 1. Grid; 2. Submersible pump; 3. River propulsion dosing device; 4. Machine room; 5. Jet aerator; 6. Air inlet; 7. Dosing barrel; 8. Mixer; 9. Dosing pump; 10. Guide tube; 11. Jet nozzle; 12. Dosing pipe; 13. Outlet. DETAILED DESCRIPTION

[0033] The purpose of the present invention can be achieved by the following technical solutions:

[0034] The purpose of the present invention is to provide a river channel dosing and aeration integrated device, including a dosing system, a submersible pump, a river propulsion dosing device, and a jet aerator;

[0035] The river-propelled doser comprises a jet nozzle for feeding a gas-liquid mixture and a dosing pipe for feeding medicine. The river-propelled doser is also provided with an outlet.

[0036] The submersible pump is connected to a jet aerator, and the outlet of the jet aerator is connected to a jet nozzle of a river propulsion doser;

[0037] The dosing system is connected to the dosing pipe of the river propulsion doser.

[0038] In one embodiment of the present invention, the dosing system includes a dosing tank, a mixer and a dosing pump;

[0039] A stirrer and a dosing pump are arranged on the top of the dosing barrel, the stirring shaft of the stirrer is located inside the dosing barrel, the liquid inlet pipe of the dosing pump is located inside the dosing barrel, and the liquid outlet pipe of the dosing pump is connected to the dosing pipe of the river propulsion doser.

[0040] In one embodiment of the present invention, the jet aerator comprises a jet tube, one end of which is connected to the submersible pump through a pipeline, and the other end of which is an outlet, which is connected to the jet nozzle of the river propulsion doser through a pipeline.

[0041] An air inlet for air intake is arranged on the top of the jet tube.

[0042] In one embodiment of the present invention, the river propulsion doser is composed of a guide tube, a jet nozzle and a dosing tube;

[0043] The guide tube is provided with a jet nozzle for feeding a gas-liquid mixture and a dosing pipe for feeding medicine. Both ends of the guide tube are openings, both of which are outlets.

[0044] In one embodiment of the present invention, the jet nozzle is in an "L" shape and extends into the interior of the guide tube.

[0045] In one embodiment of the present invention, the diameter of the guide tube is more than 10 times the diameter of the jet nozzle.

[0046] In one embodiment of the present invention, the outlet of the jet nozzle is located on the axis of the guide tube.

[0047] In one embodiment of the present invention, the mixer, dosing pump, jet aerator, and submersible pump are also connected to a controller, and the controller is connected to a mobile phone APP for communication.

[0048] In one embodiment of the present invention, a machine room is arranged on the shore, and the dosing system and the jet aerator are arranged in the machine room.

[0049] In one embodiment of the present invention, a grid net is arranged underwater, and the submersible pump and the river propulsion dosing device are arranged inside the grid net.

[0050] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] Example 1

[0052] This embodiment provides an integrated river channel dosing and aeration device.

[0053] (1) The river aeration and drug dosing equipment of the present invention is composed of an onshore part and an underwater part, wherein a machine room 4 is arranged on the onshore part and a grid net 1 is arranged on the underwater part;

[0054] (2) The machine room 4 includes a jet aerator 5 and a dosing system, which is composed of a dosing tank 7, a mixer 8 and a mechanical diaphragm dosing pump 9; a submersible pump 2 and a river flow dosing device 3 are installed in the underwater grid 2.

[0055] (3) The river water is pumped into the onshore machine room 4 by the submersible pump 2 and enters the jet aerator 5. The jet aerator generates negative pressure and inhales air from the air inlet 6, achieving gas-liquid mixing in the jet aerator to form a gas-liquid mixed liquid.

[0056] (4) The dosing barrel 7 is filled with medicine, and the liquid medicine can be stirred and mixed by the mixer 8 as needed to ensure the efficacy of the medicine; the mechanical diaphragm dosing pump 9 extracts the medicine in the dosing barrel 7 and connects it to the dosing port 12 of the river channel push flow doser 3 located in the river channel.

[0057] (5) The river channel push flow dosing device is composed of a guide tube 10, a jet nozzle 11 and a dosing pipe 12. The dosing pipe 12 is connected to the mechanical diaphragm dosing pump 9 of the dosing barrel 7 through a pipeline, and the jet nozzle 11 is connected to the ejector gas-liquid mixed liquid outlet 13 through a pipeline.

[0058] (6) The gas-liquid mixture enters the push-flow dosing device 3 located in the underwater river channel under pressure, and is ejected from the jet nozzle 11 of the river channel push-flow dosing device as an ejection water flow, forming a negative pressure, sucking the medicine liquid in the dosing tube 12 and the traction water flow located behind the guide tube 10. The medicine and the traction water flow are mixed in the guide tube 10. The diameter of the guide tube 10 is more than 10 times the diameter of the nozzle 11. The ejection water flow, the medicine liquid, and the traction water flow flow out of the guide tube 10. The outflow volume is 10-20 times the jet water volume. A large amount of low-speed outflowing water flows around the river channel to form a large-flow mixed circulation, so that the medicine liquid, high-dissolved oxygen water, and low-dissolved oxygen water around the river channel are fully mixed in a large range through mass transfer, thereby solving the problems of low oxygenation efficiency in the river channel, high labor intensity, instability, and uneven dosing of manual dosing. It can quickly purify the water quality of the river channel and eliminate black and odor. It can be widely used in emergency treatment of sudden pollution incidents in the river channel, water quality improvement, and ecological maintenance projects.

[0059] (7) The equipment of the present invention is composed of a dosing system, a jet system and a flow-pushing system, etc. The dosing, jet, and flow-pushing operations can all be automatically operated and controlled by a mobile phone APP.

[0060] Example 2

[0061] This embodiment provides an application of a river channel dosing and aeration integrated device.

[0062] A black and smelly river is located in Liwan District, Guangzhou. It is 15m wide and 626m long. The river is a semi-enclosed water body connected to the Pearl River through the downstream river. When the tide is high, the river water enters from other rivers and the river depth rises to 1.2m; when the tide is low, the river water is discharged into the downstream river and the river depth drops to 0.6m. Due to the incomplete sewage interception project, the river water is still black and smelly. Before the treatment, the average COD of the river water was 73.6mg / l and the ammonia nitrogen was 8.7mg / l.

[0063] In order to control the river, on the basis of sewage interception, a river aeration and dosing system is set up every 50m along the river, with a total of 8 sets. A dam is set up downstream of the river. If the incoming water quality is poor during high tide, no water will be taken in to control external pollution. After the equipment is installed, the agent is added 1-2 times a week. The agent is Bacillus subtilis, and the amount of each addition is 30mg / l according to the water volume. After 4 weeks of continuous operation, the water quality of the river has been significantly improved. After treatment, the average COD of the river water has dropped to 35.8mg / l, and the ammonia nitrogen has dropped to 2.3mg / l.

[0064] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A river channel dosing aeration integrated device, characterized in that: It includes a dosing system, a submersible pump (2), a river propulsion dosing device (3), and a jet aerator (5); The river-propelled doser (3) comprises a jet nozzle (11) for feeding a gas-liquid mixture and a dosing pipe (12) for feeding a drug. The river-propelled doser (3) is also provided with an outlet. The submersible pump (2) is connected to a jet aerator (5), and the outlet of the jet aerator (5) is connected to a jet nozzle (11) of a river propulsion doser (3); The dosing system is connected to a dosing pipe (12) of the river-propelled dosing device (3); The river propulsion dosing device (3) is composed of a guide tube (10), a jet nozzle (11) and a dosing pipe (12); The guide tube (10) is provided with a jet nozzle (11) for feeding a gas-liquid mixture and a dosing pipe (12) for feeding a drug. Both ends of the guide tube (10) are open and both are outlets. The jet nozzle (11) is in an "L" shape and extends into the interior of the guide tube (10). The diameter of the guide tube (10) is more than 10 times the diameter of the jet nozzle (11). A machine room (4) is arranged on the shore, and the dosing system and the jet aerator (5) are arranged in the machine room (4); a grille net (1) is arranged underwater, and the submersible pump (2) and the river propulsion dosing device (3) are arranged in the grille net (1).

2. The integrated river channel dosing and aeration device according to claim 1, characterized in that: The dosing system comprises a dosing barrel (7), a mixer (8) and a dosing pump (9); A stirrer (8) and a dosing pump (9) are arranged at the top of the dosing barrel (7); a stirring shaft of the stirrer (8) is located inside the dosing barrel (7); a liquid inlet pipe of the dosing pump (9) is located inside the dosing barrel (7); and a liquid outlet pipe of the dosing pump (9) is connected to a dosing pipe (12) of a river propulsion doser (3).

3. The integrated river channel dosing and aeration device according to claim 1, characterized in that: The jet aerator (5) comprises a jet tube, one end of which is connected to the submersible pump (2) via a pipeline, and the other end of which is an outlet, which is connected to the jet nozzle (11) of the river propulsion doser (3) via a pipeline. An air inlet (6) for air intake is arranged at the top of the jet tube.

4. The integrated river channel dosing and aeration device according to claim 1, characterized in that: The outlet of the jet nozzle (11) is located on the axis of the guide tube (10).

5. The integrated river channel dosing and aeration device according to claim 1, characterized in that: The mixer (8), the dosing pump (9), the jet aerator (5), and the submersible pump (2) are also connected to the controller, and the controller is connected to the mobile phone APP for communication.

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