A sewer flood control system including a vault formed of a strong light weight material. The vault being formed of one or more sections which can be carried by one or more persons and lowered into a hole dug by hand which is only slightly larger in cross section than the vault sections. A base under said vault sections, with a sump extending below said base. A pair of check valves located near the bottom of the vault, connected in series between a pipe connect to a public sewer system and a sewage discharge pipe from a building. A flow path for sewage from the building to enter the sump when the check valves are closed, and a ejector pump in said sump for discharge said sewage into the pipe connect to the public sewer system.

According to an embodiment of the present disclosure, there is provided a hydro crusher for water treatment, for removing living organisms from water to be treated, the hydro crusher including: a body portion which has a cylindrical shape having an inner space, and includes an inflow portion to allow the water to be treated to be drawn into the inner space therethrough, and a discharge portion to discharge the water to be treated, drawn in through the inflow portion; and solid particles which are movable by the water to be treated, wherein the movable solid particles are filled in at least a portion of the inner space.

Accordingly, there is an effect that physical sterilization is possible by killing or inactivating living organism included in water to be treated by applying a shock to the living organism.

According to one embodiment, a system and process for the equalization of pressures of a flow stream across one or more valves is provided. A process circuit having clean non-abrasive fluid and at least one slave cylinder for transmitting pressure to a process flow stream is employed.

According to one embodiment, a system and process for the equalization of pressures of a flow stream across one or more valves is provided. A process circuit having clean non-abrasive fluid and at least one slave cylinder for transmitting pressure to a process flow stream is employed.

The invention provides a heat-storage medium conveying system for a solar-thermal power plant. The system includes a high-level tank subsystem including a high-level tank used to store the heat-storage medium. The system further includes a heat-storage medium transport subsystem. The high-level tank subsystem is connected with the heat-storage medium transport subsystem. The heat-storage medium transport subsystem includes a low-level tank. A mounting height of the low-level tank is lower than that of the high-level tank. A volume of the low-level tank is smaller than a volume of the high-level tank. The heat-storage medium can enter the low-level tank from the high-level tank partially or completely by its own gravity. The low-level tank is provided with a conveying pump, and the heat-storage medium is pumped out of the low-level tank through the conveying pump. The invention solves the problems such as construction cost, operation and maintenance cost brought about by using the vertical long-shaft submerged molten salt pump, while avoiding the potential safety hazards in the design of large and small tanks or high-level and low-level tanks.

The invention provides a heat-storage medium conveying system for a solar-thermal power plant. The system includes a high-level tank subsystem including a high-level tank used to store the heat-storage medium. The system further includes a heat-storage medium transport subsystem. The high-level tank subsystem is connected with the heat-storage medium transport subsystem. The heat-storage medium transport subsystem includes a low-level tank. A mounting height of the low-level tank is lower than that of the high-level tank. A volume of the low-level tank is smaller than a volume of the high-level tank. The heat-storage medium can enter the low-level tank from the high-level tank partially or completely by its own gravity. The low-level tank is provided with a conveying pump, and the heat-storage medium is pumped out of the low-level tank through the conveying pump. The invention solves the problems such as construction cost, operation and maintenance cost brought about by using the vertical long-shaft submerged molten salt pump, while avoiding the potential safety hazards in the design of large and small tanks or high-level and low-level tanks.

An engineering system, comprising a pumping system, a wave system, a system of measuring devices, and a dynamic controller, configured for generating pressure waves with controlled frequencies, and their propagating through turbulent flow in the suction and discharge pipelines of the pumping system. The engineering system performs a method of automatic controlling the energy efficient mode of pipeline transporting of fluid medium. The dynamic controller regulates and adjusts in real time optimal values of frequencies of generating pressure waves, providing minimum values of hydrodynamic resistance of turbulent flow in the discharge pipeline, for any average value of the flow velocity, compared to the hydrodynamic resistance of the turbulent flow having the same velocity, but not interacting with pressure waves. Automatic controlling the process of generating pressure waves with optimal frequencies by the dynamic controller, ensures the maximum energy efficiency of the process of pipeline transporting of fluid medium.

An engineering system, comprising a pumping system, a wave system, a system of measuring devices, and a dynamic controller, configured for generating pressure waves with controlled frequencies, and their propagating through turbulent flow in the suction and discharge pipelines of the pumping system. The engineering system performs a method of automatic controlling the energy efficient mode of pipeline transporting of fluid medium. The dynamic controller regulates and adjusts in real time optimal values of frequencies of generating pressure waves, providing minimum values of hydrodynamic resistance of turbulent flow in the discharge pipeline, for any average value of the flow velocity, compared to the hydrodynamic resistance of the turbulent flow having the same velocity, but not interacting with pressure waves. Automatic controlling the process of generating pressure waves with optimal frequencies by the dynamic controller, ensures the maximum energy efficiency of the process of pipeline transporting of fluid medium.

The present invention relates to a water piping system, and more particularly, to a water piping system configured to reduce slam and water hammer of a check valve through delay of backflow of fluid by ejecting water stored in a pressure tank to a fluid forward direction at a high pressure when a pump in the water pipe is suddenly stopped, and through inducement of complete closure of the check valve by reducing a pressure applied to the check valve.

The present invention relates to a water piping system, and more particularly, to a water piping system configured to reduce slam and water hammer of a check valve through delay of backflow of fluid by ejecting water stored in a pressure tank to a fluid forward direction at a high pressure when a pump in the water pipe is suddenly stopped, and through inducement of complete closure of the check valve by reducing a pressure applied to the check valve.