The invention provides a forward osmosis treatment method of wastewater with high salinity and high organic matter concentration. The forward osmosis treatment method comprises a wastewater concentration process and an absorbing liquid cyclic regeneration process; in the wastewater concentration process, a forward osmosis technology is adopted to concentrate wastewater, and an adsorbing liquid subjected to hyperosmosis is used for concentrating high salinity and high COD wastewater, so as to obtain a diluted driving liquid and concentrated wastewater; in the absorbing liquid cyclic regeneration process, a multi-stage evaporation technology is adopted to dehydrate the diluted driving liquid to obtain purified water and a regenerative adsorbing liquid to be used for the forward osmosis process. The high salinity and high COD wastewater subjected to hyperosmosis is concentrated to obtain the diluted driving liquid and the concentrated wastewater; the multi-stage evaporation technology is adopted in the adsorbing liquid subjected to hyperosmosis to dehydrate the diluted driving liquid to obtain the purified water and the regenerative adsorbing liquid to be used for the forward osmosis process. The forward osmosis treatment method has the advantages of being stable in operation, low in cost, wide in application range and the like.

Forward osmosis treatment method of wastewater with high salinity and high organic matter concentration

The invention discloses an energy-saving comprehensive chemical wastewater deep treatment system and a treatment method thereof. The system comprises a forward osmosis (FO) membrane concentration device and a multi-effect evaporator, wherein the FO membrane concentration device comprises one or more stages of airtight FO membrane exchange boxes, a sucked solution recycling device and a clear water recovering device; the sucked solution recycling device is connected with the stages of airtight FO membrane exchange boxes through electrical valves respectively; the clear water recovering device is connected with the sucked solution recycling device; the stages of airtight FO membrane exchange boxes are connected through liquid discharge electrical valves in sequence and connected with a mother liquid incineration furnace through overrunning electrical valves. The method is characterized in that for high osmotic pressure characteristic of comprehensive chemical wastewater, water resources are recycled while the comprehensive chemical wastewater is efficiently concentrated to generate electrical energy by preparing a sucked solution with relatively good colligative properties and utilizing osmotic pressure difference caused by colligative property difference of the solution; the automatic interlocking control is realized in a running process and the running mode can be adjusted according to different water feeding conditions.

Energy-saving comprehensive chemical wastewater deep treatment system and treatment method thereof

The invention discloses an energy-saving coal chemical engineering wastewater deep treatment system and a treatment method thereof The system comprises a forward osmosis (FO) membrane concentration device and a multi-effect evaporator, wherein the FO membrane concentration device comprises one or more stages of airtight FO membrane exchange boxes, a sucked solution recycling device and a clear water recovering device; the sucked solution recycling device is connected with the stages of airtight FO membrane exchange boxes through electrical valves respectively; the clear water recovering device is connected with the sucked solution recycling device; the stages of airtight FO membrane exchange boxes are connected through liquid discharge electrical valves in sequence and connected with a mother liquid incineration furnace through overrunning electrical valves The method is characterized in that for high osmotic pressure characteristic of coal chemical engineering wastewater, water resources are recycled while the coal chemical engineering wastewater is efficiently concentrated to generate electrical energy by preparing a sucked solution with relatively good colligative properties and utilizing osmotic pressure difference caused by colligative property difference of the solution; the automatic interlocking control is realized in a running process and the running mode can be adjusted according to different water feeding conditions

Energy-saving coal chemical engineering wastewater deep treatment system and treatment method thereof

The invention provides a double-working-medium circulation power generation system with a direct contact condenser The system comprises a steam generator, an expansion machine, a generator, the direct contact condenser, a working medium pump The steam generator is used for heating a working medium through waste heat, converting the working medium into high pressure steam and delivering the steam into the expansion machine The expansion machine is driven by the high pressure steam to work The generator is coaxially connected with the expansion machine and driven by the expansion machine to generate power The direct contact condenser is used for cooling the low pressure steam working medium into a liquid working medium in the way that the liquid working medium is in direct contact with the low pressure steam working medium discharged from the expansion machine The working medium pump is used for delivering the liquid working medium discharged from the direct contact condenser to the steam generator The waste heat recycling device is used for receiving waste heat discharged from the steam generator The direct contact condenser is utilized to enable the high temperature steam working medium and the low temperature liquid working medium to be in direct contact, the low temperature liquid working medium is utilized to cool the high temperature steam working medium The cost is reduced, and the heat exchange efficiency is higher under direct contact

Double-working-medium circulation power generation system with direct contact condenser

The invention relates to a secondary bio-chemical effluent desalting system for an energy-saving wastewater treatment plant and a treating method of the secondary bio-chemical effluent desalting system. The secondary bio-chemical effluent desalting system comprises a forward osmosis salt concentrating device and a multi-effect evaporator, wherein the forward osmosis salt concentrating device consists of an FO membrane sealing exchange tank in at least one stage, an extracting liquid recovering and utilizing device and a clear water recovering device, the extracting liquid recovering and utilizing device is connected with the FO membrane sealing exchange tanks in each stage by virtue of an electric valve, the clear water recovering device is connected with the extracting liquid recovering and utilizing device, and the FO membrane sealing exchange tanks in all the stages are sequentially connected with a drainage electric valve and are all connected with a mother liquor multi-effect evaporator by virtue of an overrunning electric valve. With the adoption of the treating method, aiming at the high osmotic pressure difference characteristic of secondary bio-chemical effluent of the wastewater treatment plant, by preparing an extracting liquid with high colligative property and utilizing an osmotic pressure difference caused by a colligative property difference of solutions, the secondary bio-chemical effluent of the wastewater treatment plant is efficiently concentrated, and a water resource is recovered and recycled so as to generate electricity; and in the running process, automatic interlocking control is realized, and the running mode can be regulated according to different influent conditions.

Secondary bio-chemical effluent desalting system for energy-saving wastewater treatment plant and treating method of secondary bio-chemical effluent desalting system

The invention discloses a forward osmosis sea water desalination system which comprises a forward osmosis device, a hydraulic turbine, a speed increaser, a pressure transducer, a heat pump system, a turbine generator and an absorption tower. According to the forward osmosis sea water desalination system, a drawing solution absorbs water molecules through the forwards osmosis device and obtains osmosis energy, and redundant osmosis energy is output through the hydraulic turbine to drive the heat pump system to work. A solute of the drawing solution volatilizes steam or is thermally decomposed into a gas after absorbing heat in a condenser of the heat pump system, and drives the turbine generator to generate electricity. A fresh water solution obtained after separation of the drawing solution releases heat in an evaporator of the heat pump system to form cooling water, one part of cooling water enters an absorbing tower for spraying, and absorbing steam and gas to re-generate a concentrated drawing solution, and the other part of cooling water is output as product water. The forward osmosis sea water desalination system has the characteristics of high osmosis energy utilization rate, low energy consumption of a device, wide application range and the like, is greatly promoted in an application progress of a forward osmosis technology in the field of sea water desalination, and is wide in application prospect in the future development.

Forward osmosis sea water desalination system

The invention discloses a tank-surface-evaporation solar thermal power generation system comprising an evaporation tank, a light-permeable ceiling, a mirror array, a steam turbine generator set, a hybrid condenser, a mixed solution pipeline, a solution pump, a cooling water pipeline, a cooling water pump, a cooling column, and an air cooler Liquid in the evaporation tank is composed of low-boiling-point medium layer and a fresh water layer; radiant energy of sunlight is transmitted to the low-boiling-point medium layer by means of direct irradiation and reflection; obtained high-pressure steam dives the steam turbine generator set to act to generate power; cooling water led from the bed of the evaporation tank dissipates heat through the cooling column, enters the hybrid condenser and contacts and condenses to discharged so that mixed solution is formed; the mixed solution is delivered back into the evaporation tank by the solution pump; the low-boiling-point medium and the fresh water are unable to dissolve due to density difference and automatically layer The tank-surface-evaporation solar thermal power generation system is simple in structure, high in heat collection efficiency, high in energy conversion rate, high in circulating efficiency, high in station capacity, low in building cost, suitable for low-cost large-scale production, and widely applicable to the technical field of solar thermal power generation technologies

Zhao Guanghui

Papers

Forward osmosis sea water desalination system

Tank-surface-evaporation solar thermal power generation system