CN105442691B - A kind of city river discharge outlet is regulated and stored system with bionical breast-stroke air bag - Google Patents

Abstract

The invention relates to a bionic frog-type air bag regulation and storage system for urban river outlets. The purpose of the present invention is to store the sewage at the outlet and store it in pipes or treat it on the spot. It has the advantages of less land occupation, less investment, less construction difficulty, flexible operation and wide application range, and can deal with the large flow of polluted drainage in the rainy season. storage and handling needs. The technical solution of the present invention is: the system includes a pretreatment system arranged on the river bank and a bionic frog-type air bag adjustment and storage system. Grille, a fine grid with a grid gap of 5-10mm, and a grit chamber; the air bag regulation and storage system is sequentially composed of a sensor set in the grit chamber and controlled by the liquid level, an air compressor, an air bag room, and a gas bag shrunk in the air bag room. The airbag, the exhaust valve arranged on the airbag and the submersible sewage pump connected with the drainage pipe arranged at the bottom of the airbag; when the bionic frog-type airbag regulation and storage system works, the airbag is in the river water body.

Description

A bionic frog-type airbag adjustment and storage system for urban river outlets

technical field

The invention relates to a bionic frog-type air bag regulation and storage system for urban river outlets, which belongs to the technical field of environmental engineering and is suitable for river water environment improvement projects.

Background technique

River pollution is the combined effect of point and non-point sources. For urban rivers, whether it is point or non-point source pollution, most of it enters the river through drainage pipes. In the final analysis, controlling point source pollution at outfalls is the key. According to the analysis of water pollution sources in some urban rivers, the pollution of outfalls along rivers accounts for more than 90% of the total water pollution load.

Outfall pollution comes from sewage pipes and rainwater pipes. The discharge of sewage pipes is mainly unintercepted sewage and combined overflow sewage, and the discharge of rainwater pipes is mainly surface runoff. Among them, for the uninterrupted sewage, it is often treated by laying sewage interception pipes along the river. However, for the overflow sewage of the combined system, since the drainage system itself is designed to be the combined system, certain overflow is allowed in rainy days, but in our country The confluence system has a low interception multiple, and the overflow water has caused serious pollution to the river. At the same time, the surface runoff, rain in rainy days scours the road surface, etc., also carries a large amount of pollutants into the river, especially the initial rainwater, the concentration of pollutants is quite high. High, often exceeding the concentration of primary sewage; it can be said that the initial rainwater in the combined overflow sewage and surface runoff is the main source of water pollution in many urban rivers after sewage interception along the river, and it is also the key to the improvement and promotion of water quality in these urban rivers bottleneck.

These two types of drainage have two common characteristics: First, the water volume fluctuates greatly. Affected by rainfall, the discharge of these two types of outfalls is small in the dry season and increases sharply in the rainy season. Second, source control is difficult. Affected by urban development, it is very difficult to control this type of pollution from the source. To reduce initial rainwater pollution, low-impact development facilities such as green roofs and sunken green spaces are required. For established urban areas, construction is very difficult.

For the above-mentioned pollution sources, two methods can be adopted: "large-scale storage storage + managed treatment or on-site treatment" or "small-scale storage or no storage + large-scale on-site treatment facilities". The former requires large storage facilities, accounting for The land area is large, and due to the limited space in the river bank, the construction is difficult and the cost is high; although the latter has reduced storage facilities, the scale of the treatment facilities is large, and the facilities are idle when they are not processed, resulting in a lot of waste.

At present, there are relatively few studies on regulation and storage of urban river outlets at home and abroad, and most of them are limited to large-scale regulation and storage, which has obvious shortcomings.

Contents of the invention

The technical problem to be solved by the present invention is: aiming at the above existing problems, to provide a bionic frog-type air bag regulation and storage system for urban river outlets, which can store the sewage at the outlets and store them in pipes or treat them on the spot, which has the advantages of less land occupation and low investment. The advantages of low cost, low construction difficulty, flexible operation, and wide application range can meet the storage and treatment needs of large-flow polluted drainage in the rainy season.

The technical solution adopted in the present invention is: a bionic frog-type airbag regulation and storage system for urban river outlets, which is characterized in that: the system includes a pretreatment system and a bionic frog-type airbag regulation and storage system arranged on the river bank. The pretreatment system consists of intercepting wells arranged at the discharge outlet, coarse grids with a grid gap of 20-40 mm, fine grids with a grid gap of 5-10 mm, and a grit chamber; the air bag regulation and storage system consists of It is installed in the grit chamber and consists of a sensor for liquid level control, an air compressor, an airbag chamber, an airbag shrunk in the airbag chamber, an exhaust valve installed on the airbag, and a submersible pump connected to the drain pipe installed at the bottom of the airbag ; When the bionic frog-type air bag adjustment and storage system works, the air bag is in the river water body.

The grit chamber is equipped with two water outlet pipes, the large pipe a and the small pipe b, the small pipe b is directly connected to the municipal pipe network or the on-site treatment system, the large pipe a is connected to the bionic frog-type air bag regulation and storage system, and the large pipe a is set A valve c controlled by a sensor.

The air compressor operates intermittently according to the inflation of the air bag and the hydraulic pressure difference between the air bag and the water body of the river.

The airbag chamber is made of brick, steel and concrete.

The beneficial effects of the present invention are: the present invention has the advantages of less land occupation, less investment, less construction difficulty, flexible operation, and wide application range, and is especially suitable for riverbanks with narrow spaces or constructed riverbank outlets for treating combined overflows Running water or incipient rain. The main features are: (1) It can regulate the outlet water under different working conditions; (2) It solves the problems that the traditional online regulation and storage facilities occupy a large area and the construction is difficult; (3) After the online regulation and storage, the sewage can be included Municipal pipe network or local treatment, the treatment scale is small.

Description of drawings

Fig. 1 is a process flow diagram of the present invention.

Figure 2 is a plan view of the present invention.

detailed description

As shown in Fig. 1 and Fig. 2, the present embodiment is a bionic frog-type airbag regulation and storage system for urban river outlets, which is composed of a pretreatment system and a bionic frog-type airbag regulation and storage system, both of which are built on the river bank 12 ;The pretreatment system can intercept most of the combined system overflow water or initial rainwater, and carry out preliminary treatment on the intercepted sewage, remove large particles and gravel, and protect the subsequent bionic frog airbag storage system; the bionic frog airbag storage system works , the air bag is in the river water body 11 and does not occupy the space of the river bank 12 .

The pretreatment system consists of interception well 1, coarse grid 2, fine grid 3, and grit chamber 4 in sequence.

The interception well 1 is arranged at the outlet, and intercepts the heavily polluted water body at the outlet, and enters the air bag regulation and storage system. When there is heavy rainfall, the later drainage overflow is discharged into the river.

The grid gap of the coarse grid 2 is 20-40mm, and intercepts the large particles in the intercepted sewage.

The fine grid 3 has a grid gap of 5-10mm, and intercepts the small particles in the intercepted sewage.

The designed residence time of the grit chamber 4 is the design flow rate of 20s in the rainy season, which is used for sedimentation and removal of sand particles in the sewage. There are two outlet pipes, the large pipe a and the small pipe b, in the grit chamber. The small pipe b is directly connected to the municipal pipe network or the local treatment system, and is used to directly pipe or treat the effluent after the grit chamber when the flow rate of the outlet is small. , does not enter the bionic frog-type air bag regulation and storage system; the large pipe a is connected to the bionic frog-type air bag regulation and storage system, and the valve c is set on the pipe, which is controlled by the sensor 5. When the flow is large in the rainy season, the water inflow into the grit chamber exceeds the pipe b for delivery When the capacity is high, the valve c is opened, and the excess water is introduced into the bionic frog-type air bag regulation and storage system for storage.

The bionic frog-type airbag adjustment and storage system consists of an inductor 5, an air compressor 6, an airbag chamber 7, an airbag 8, an exhaust valve 9, and a submersible sewage pump 10.

The sensor 5 is set in the grit chamber, controlled by the liquid level, and has two working conditions:

1) When the water volume is small, since the large pipe a in the grit chamber 4 is in a closed state controlled by the valve c, the inflow flow of the grit chamber 4 is small, and all the incoming water is introduced into the local treatment system through the small pipe b, and the water level of the grit chamber 4 is kept Low water level, sensor 5 has no signal;

2) When the amount of water in the rainy season is large, the flow of water entering the grit chamber 4 exceeds the flow capacity of the small pipe b, and the water level of the grit chamber 4 rises. Open the valve c on the large pipe a, and at the same time, start the air compressor 6 to inflate the air bag 8, and the sewage from the outlet enters the air bag 8 for storage. After the rainfall ends, the submersible sewage pump 10 pumps the sewage stored in the air bag 8 into the Municipal pipe network or on-site treatment system treatment. Simultaneously, the valve c on the large pipe a in the grit chamber 4 is closed, the exhaust valve on the air bag 8 is opened, the sewage in the air bag 8 gradually decreases, and the air bag 8 is retracted in the air bag chamber 7 gradually.

The air compressor 6 starts when the water level of the grit chamber 4 rises and the sensor 5 sends a signal to inflate the air bag 8, and the water level of the grit chamber 4 drops. After reaching a certain water level, the sensor 5 turns off when the signal is sent. The compressor 6 runs intermittently according to the inflation situation of the air bag 8 and the hydraulic pressure difference between the air bag 8 and the water body of the river.

The airbag chamber 7 is used to store and protect the cavity of the airbag 8, and can be made of brick, steel, concrete, etc.

This regulation and storage system adopts the principle of bionics. The male frog in the bionic frog has a pair of air bags on both sides of the mouth, which are usually in a contracted state. Amplified by resonance. This regulation and storage system constructs an artificial airbag, which is made of organic material with anti-stab performance. It is not inflated at ordinary times and does not store sewage. The airbag 8 is in a contracted state and stored in the airbag chamber 7. When the flow rate is large in the rainy season, the sensor 5 sends a signal. , the air compressor 6 starts to inflate, and the air bag 8 bulges out from the air bag chamber 7 to store sewage. The advantage of this regulation and storage system is that the air bag 8 is usually in a contracted state, and it is a soft structure, which avoids the disadvantages of the traditional regulation and storage system, such as the hard structure, large footprint, high construction cost, and difficult construction.

The exhaust valve 9 is arranged on the air bag, and during the process of storing sewage in the air bag 8, it is properly opened and exhausted according to the air pressure, so as to keep the water in the air bag 8 smooth, and discharge excess gas when the air bag shrinks.

The submersible sewage pump 10 is connected through the drainage pipe arranged at the bottom of the air bag 8, and is used to lift the sewage stored in the air bag 8 to the sewage pipe network and enter the sewage plant for centralized treatment or into a decentralized on-site treatment system. Due to the adjustment and storage of the air bag 8, the submersible sewage pump 10 configured in the system can be miniaturized, and slowly pump out the sewage in the air bag after the rainfall ends.

In the actual application of this embodiment, firstly, based on the basic data, the outfall flow in different time periods (dry season, rainy season, daytime, nighttime) and the hydrological conditions of the river, including flow velocity, water level, and water depth, should be clarified. Then measure the outlet, combine the topographic map data, select the location and scale of the pretreatment system and the airbag storage system, especially pay attention to the size of the outlet pipe of the grit chamber 4 (large pipe a and small pipe b), and the small pipe b depends on the airbag Empty time, scale of sewage treatment in dry season, and size of on-site treatment facilities; large pipe a depends on the water flow rate of the interception well and the scale of the airbag storage system; the opening of large pipe a is through the sensor 5 and large pipe in the grit chamber 4 Valve c on a is realized. The scale of the airbag regulation and storage system depends on the design rainfall pattern, the size of the return period, the concentration of pollutants at the outfall, the water environment capacity of the river, and the scale of subsequent treatment facilities. Increased project investment is also likely to over-protect the water environment of the river. In order to avoid occupying the flood control section of the river and flooding, the airbag system should be arranged as far as possible in the urban river and the concave bank of the river controlled by the dam.

Claims (3)

1. The system 1. a kind of city river discharge outlet is regulated and stored with bionical breast-stroke air bag, it is characterised in that：The system includes being located at riverbank On pretreatment system and bionical breast-stroke air bag regulate and store system, the pretreatment system is successively by being arranged on the Vatch basin of discharge outlet (1) coarse rack (2) that, grid gap is 20~40mm, the fine fack (3) and setting pot (4) structure that grid gap is 5~10mm Into；The air bag regulates and stores system successively by being arranged on the interior inductor (5), air compressor machine (6), gas by Liquid level of setting pot (4) Capsule room (7), the air bag (8) being contracted in gasbag chamber (7), the air bleeding valve (9) being arranged on air bag and with being arranged on air bag bottom The connected submersible sewage pump (10) of drainpipe constitute；The bionical breast-stroke air bag regulate and store system work when, air bag (8) be in urban river water In body (11)；

   The setting pot (4) is provided with two outlet conduits of big pipe a and tubule b, and tubule b is directly accessed city planting ductwork or treatment in situ System, big pipe a accesses bionical breast-stroke air bag and regulated and stored system, and the valve c controlled by inductor (5) is set on big pipe a.
2. The system 2. a kind of city river discharge outlet according to claim 1 is regulated and stored with bionical breast-stroke air bag, it is characterised in that： The air compressor machine (6) is transported according to the inflation situation and air bag (8) of air bag (8) with the situation interval of river water body (11) hydraulic pressure difference OK.
3. The system 3. a kind of city river discharge outlet according to claim 1 or 2 is regulated and stored with bionical breast-stroke air bag, its feature exists In：The gasbag chamber (7) is formed by brick, steel, concrete for making.