Flush system
Smart ejector, flush door, vacuum flush
Regulating water in the reservoir
Hydraulic flip adjustment weir and overflow grille
Regulate tank overflow
Unpowered pontoon regulating weir
Regulate tank drainage
Pump discharge – non-clogging submersible sewage pump, gravity self-drainage – no power flow restrictor
Monitor
Kaiquan Intelligent Monitoring System
SCADA data acquisition and monitoring system

Storage pond flushing system

The storage tank is a main way to collect and store urban rainwater and sewage. Temporarily storing municipal rainwater sewage in a storage tank, and then slowly transporting the water to the sewage plant for treatment when the sewage plant has the capacity, can effectively reduce rainwater peaks and control non-point source pollution, and is an important part of urban stormwater management. an effective way.
After each emptying, a lot of sediment will be produced at the bottom of the storage tank. In order to avoid a reduction in the tank capacity and the risk of explosion, it must be flushed after each emptying.
The mainstream flushing technology of the regulating tank is divided into door flushing, intelligent ejector flushing and vacuum flushing.

Introduction
The smart ejector is a highly efficient and energy-saving cleaning equipment, suitable for rainwater storage tanks and water storage pipes.
The high-power water pump combined with the equipment’s unique nozzle design can produce a powerful flushing water column to clean the pool floor. Equipped with Kaiquan Group’s intelligent control software, it can ensure that the equipment is always in an efficient and energy-saving state during the cleaning process.

Working principle

01 High water level operation (mixing stage)
When the liquid level drops to 2.5m, the ejector is started to perform jet mixing, so that the sediment in the pool is suspended and evenly mixed with water and discharged from the storage pool with the drainage pump. The jet mixing process can aerate rainwater and sewage.
02 Low water level operation (long-distance jet flushing stage)
When the liquid level in the pool drops to 0.6~0.3m, the jet flushing ability of the ejector is enhanced, and the high-pressure water flow can flush to the extreme corners and dead zones of the regulating pool.
03 Ultra-low water level operation (bottom flushing stage)
When the liquid level in the storage tank continues to drop below 0.30m, the ejector operates under low flow conditions, and the jet flushing distance is gradually shortened. The bottom of the tank is gradually swept from far to near until the liquid level drops to -0.15m. , the ejector stops running.

Advantage
■Compared with other flushing methods, it increases aeration and stirring, which can reduce settlement. It has high flushing head, good flushing effect and flexible layout.
■Suitable for renovation projects and easy to upgrade.
■The flushing pump has its own cooling system, which can operate in wet or dry conditions and has reliable performance.
Application
Square, round, special-shaped storage tanks, rainwater tank culverts, sewage plants.

Main parameters

Introduction
The flushing door system mainly consists of the flushing door body and an intelligent control system. The main body of the flush door is made of stainless steel. When the equipment is running, it is controlled by the intelligent control system.
A rainwater storage tank is usually divided into multiple flushing corridors. A reservoir and flushing door will be installed at the beginning of the corridor, and a water collection channel will be installed at the end of the corridor. When the water storage tank is emptied and the liquid level in the water outlet collection channel drops to the set level, the flushing door releases the water stored in the water tank. The potential energy of this water is converted into kinetic energy to flush the bottom of the water storage tank. , take away the sediment at the bottom of the pool, and then collect and discharge it through the collection channel at the end.

Flush door advantages
■System stability
■High efficiency and energy saving
■Long flushing length
Flush door applications
■Rectangular storage tank
■Rainwater tank culvert
■Rainwater pipe flushing

Door width selection chart

Main design parameters
Washing corridor width: about 5m
Maximum flushing corridor length: 120m
Flushing door specifications: 2800mm X 400mm
Hydraulic pipeline length: no more than 150m
Total installed power: 0.37kW
Water storage chamber slope: 1:10~1:5
Washing corridor slope: 0.5%~1%
Volume of the water outlet collection channel: greater than 1.3 times the volume of the water storage chamber

Introduction
The vacuum flushing system consists of a water storage chamber, vacuum valve, vacuum pump and electronic control system.
The storage tank using a vacuum flushing system consists of a water storage chamber, a rainwater storage area and a flushing water discharge area. Depending on the pool type, one or more water storage chambers can be set up in a storage pool, which can be controlled by a vacuum suction system but remain independent.
When the water level in the storage area rises, the vacuum pump starts to evacuate the air in the water storage chamber so that the water in the storage tank is pressed into the water storage chamber under the action of atmospheric pressure. Once the storage system is evacuated, the vacuum valve will open and the vacuum in the water storage chamber will be destroyed. At this time, the water in the water storage chamber will quickly enter the storage area by gravity, generating a horizontal flushing wave at the bottom of the storage tank, effectively cleaning the garbage at the bottom of the tank. and some impurities in sewage.

Advantage
■There is no rotating equipment in the pool, and maintenance of all components does not require entering the pool.
■Good flushing effect (high flushing water head)
■Small constraint by pool shape
■Low energy consumption

Application
Square, round, special-shaped storage tanks/rainwater tank culverts/rainwater pipe flushing

Main design parameters
The slope of the bottom of the pool is 0.5-2%
The maximum width of a single water storage chamber does not exceed 10m
Each corridor is separated by a 50cm high partition wall, and the starting end of the flushing corridor is 2m
The maximum allowable water head in the water storage chamber is 7m
The volume of the terminal flushing water collection channel is ≥1.2 times the volume of the water storage chamber
The design slope of the collection channel should be ≥5%
The design of the water storage chamber must ensure air tightness and waterproofing

Introduction to hydraulic flip adjustment weir
The hydraulic flip adjustment weir consists of a stainless steel weir door, door frame, hydraulic opening and closing system, liquid level gauge and control system. It is a device used to control the water storage level and prevent water backflow. The hydraulic flip adjustment weir is equipped with an automated program, and the water storage level can be automatically adjusted according to rainfall and time.

Advantage
■Automatic adjustment of weir top height based on external liquid level
■Adjustable weir top ensures pollution interception effect
■Special sealing structure to ensure zero leakage
■The overflow port can be completely closed
■Real-time monitoring of water levels inside and outside the drainage network
■Hydraulic control, quick opening
■Stable operation and low maintenance
■All stainless steel material, corrosion-resistant
■Low power consumption, energy saving and environmental protection
■Can be controlled remotely

Application
■Rainwater storage tank/water storage pipe
■Rainwater overflow facilities
■Diversion building for pipeline/water storage facilities
■Drainage ditch
■Hydropower station

Main design parameters

Introduction
The overflow grille is installed on the concrete weir at the overflow port, and the water flow passes through the grille horizontally and transversely. The main function is to prevent floating, suspended, non-degradable organisms and solid impurities from flowing out, and ensure that the impurities are screened out at the inflow. This will not interfere with the overflow discharge process. Screen residue and solid impurities are intercepted at the front end of the grid and pushed into subsequent sewage pipes with the water flow. The grid uses an electronically controlled hydraulic system to control the back and forth movement of the cleaning brush between the grids to achieve self-cleaning. When a blockage occurs, the control system uses the cleaning brush to repeatedly move at the blockage position until the blockage is cleared. A back baffle is installed on the back of the grille to ensure uniform flow of water in the grille and the maximum flow speed does not exceed 1.5m/S. There is an emergency overflow outlet above the grille. When the grille self-cleaning system fails or the grille is overloaded, water can pass through the emergency overflow outlet on the top of the grille.

Advantage
■High filtration efficiency
■Automated cleaning
■Full underground installation.
■Low energy consumption

Application
■Combined pipeline interception well overflow port
■Adjust the water inlet grille, water outlet and overflow port of the reservoir

Main design parameters

Introduction to non-clogging submersible sewage pump
The submersible sewage pump developed by Shanghai Kaiquan complies with the national standard GB/T24674-2009 “Sewage and Waste Submersible Electric Pump”. The newly developed hydraulic model without overload has higher hydraulic efficiency.
At the same time, a comprehensive optimization design of the motor end has been carried out in terms of mechanical structure, wiring, sealing, protection, control, etc., so that the whole machine has better hydraulic performance, stronger versatility, and better reliability.

Advantage
■Unique no-overload hydraulic design, innovative pump technology for sewage treatment
■Excellent mechanical seal
■Mechanical seal self-cleaning technology
■Short shaft extension design
■Bearing design
■Reliability design of submersible motor
■Universal water pump installation design

Main application
It is suitable for sewage treatment plants, municipal sewage lifting pumping stations, water plants, water conservancy drainage and irrigation, water diversion projects, integrated pumping stations, etc. to discharge sewage, wastewater and rainwater containing solids and long fibers.

Introduction
Unpowered flow control equipment is mainly used for water volume control in pipe networks and operates stably without power. According to the changes in water levels upstream and downstream of the flow regulating equipment, the equipment is accurately adjusted to the optimal drainage section, so that the discharge flow rate of the flow regulating equipment can be kept relatively constant and the flow limiting effect is achieved.

Advantage
■No power pontoon adjustment, saving operating costs
■Small water head loss
■ Equipped with an anti-clogging control system. Once a large obstacle blocks the water outlet, the opening will be quickly opened to the maximum to allow the obstacle to pass.
■It can operate stably even in the presence of backwater or water backup.
■Limit flow rate can be adjusted
■Remote control possible

Main design parameters

Introduction
The unpowered pontoon regulating weir can be used to accurately control water level height and drainage without external power drive, and is not affected by return water conditions. Compared with other drainage equipment, the unpowered pontoon regulating weir has a larger drainage capacity and can effectively increase the water storage capacity of water storage facilities. Due to the control of the upstream water level and the unique design of the product itself, the unpowered pontoon regulating weir can also be used under backwater or flood conditions. In addition, the unpowered pontoon regulating weir can also effectively intercept floating objects.

Advantage
■Maintain precise and constant water level
■No need for external power drive
■Can intercept floating and suspended objects
■Small installation space required
■Operational safety

Application
■Dams and floodwater reservoirs
■Dikewei area
■storm water storage tank/water storage pipe/drainage facility
■Hydropower station

Automated monitoring system