3 results about "Free water" patented technology

The invention discloses a device applicable to a pipe washing work of a deep sea oil and gas pipeline. The device comprises a water flushing system, a chemical agent filling system which is connected to the water flushing system, an assisting system which assists the water flushing system to clean the pipeline, and a data acquiring and transmitting system for acquiring and transmitting data of a pipe cleaning device, wherein the water flushing system comprises at least free water flushing and ROV supported water flushing; the free water flushing is that the inner and outer water pressure difference of a seawater pipeline is treated as power to flush water for cleaning the pipe; the ROV supported water flushing is that hydraulic power supplied by a centrifugal pump is used for flushing water to clean the pipe; the chemical agent filling system comprises at least an underwater chemical agent tank, a chemical agent discharging assembly, a chemical agent filling assembly, a chemical agent filtering and adjusting assembly and an underwater rapid chemical agent supplementing joint; and the chemical agent is filled with different concentration and mixing ratio through the chemical agent filling and adjusting assembly based on the flow rate change of a main pipeline. The device overcomes deep water pressure and resistance along the way and reduces the shortages of a large amount of aboveground devices for normal pipe cleaning work, large occupied space, and high input cost; and the deep water pipeline cleaning work efficiency is improved.

The invention belongs to the technical field of seawater desalination, and particularly relates to a heat pump seawater desalination device utilizing an evaporators and a condenser. According to the heat pump seawater desalination device, a refrigerant circulating system comprises a compressor, a condenser, a throttle valve and an evaporator; a first seawater desalination system comprises a firstseawater tank, a first water pump, a condenser, a vacuum pump, a first heat exchanger and a fresh water tank; seawater in the first seawater tank is conveyed to the condenser by the first water pump,and is heated and vaporized to form salt-free water vapor; a second seawater desalination system comprises a second seawater tank, a second water pump and an evaporator; and seawater in the second seawater tank is conveyed into the seawater channel of the evaporator by the second water pump to form salt-free ice. According to the invention, fresh water is prepared by combining the condenser and the evaporator, so that the seawater desalination speed is increased, and the seawater desalination cost is saved.

The invention relates to a sludge low-temperature drying pretreatment reagent, a preparation method and a using method of the reagent. The composition and mass percentage of the sludge low-temperature drying pretreatment reagent are as follows: 5%-15% of Fe<2>(SO<4>)<3>, 10%-20% of Al<2>(SO<4>)<3>.18H<2>O, 1%-5% of MnSO<4>, 0.1%-1% of Na<4>P<2>O<7>.10H<2>O, 25%-40% of H<2>O<2>, and the balance of water. The sludge low-temperature drying pretreatment reagent provided by the invention can destroy micellar structures of sludge before low-temperature drying of the sludge, transform bond water inside the sludge into free water, decompose organic matters in the sludge, and enable formation of gaps among sludge particles, and thus enables moisture inside the sludge to separate out more easily and improves the efficiency of the follow-up sludge low-temperature drying.