58results about How to "Increase water production ratio" patented technology

The invention relates to a multi-effect membrane distillation device with efficient internal heat reclamation function and a method. The middle part of a membrane shell is provided with a cavity, two ends of the membrane shell are provided with an inlet and an outlet respectively, hollow fibrous membranes and hollow fiber pipes arranged uniformly are arranged in the cavity of the membrane shell, joints at two ends of the hollow fibrous membranes and the hollow fiber pipes are connected with the inlet and the outlet respectively, the lower end of the membrane shell is provided with a distillate outlet, and an external heat exchanger is connected in series between the inlet and the outlet of the water return end of a membrane assembly. The device has compact structure, simple and mild operating condition, low energy consumption and high water making rate, and can be used for small-scale dispersed implementation and integrated application; the method can be used in the fields of sea water desalinization, bitter water desalinization, concentration treatment of aqueous solution of nonvolatile or semi-volatile solutes, environmental protection and the like; and particularly when the method is used for concentration of aqueous solution of nonvolatile and semi-volatile solutes such as sodium chloride, ammonium sulfate, ammonium nitrate, sodium nitrate, sodium carbonate, sodium hydroxide, sulfuric acid, hydrochloric acid, glucose, xylitol, urea, glycerol, ethylene glycol, lactic acid, glyoxylic acid, dimethyl sulfoxide, sulfolane and the like, normal pressure steam or hot water is used as a heat source, and the highest water making rate can reach 13.7.

The invention discloses a multi-effect membrane distillation-multistage flash evaporation seawater desalination system. The multi-effect membrane distillation-multistage flash evaporation seawater desalination system comprises a steam jetting pump (9), a concentrated water discharge pump (1), a material liquid circulating pump (2), a vacuum pump (3), a product water pump (4), N membrane assemblies, N freshwater flash evaporation tanks, N+1 heat exchange assemblies and N-1 concentrated water flash evaporation tanks, wherein the plurality of membrane assemblies and heat exchange assemblies are connected in series to form 'multi-effect' distillation in the term of the traditional distillation; the plurality of freshwater flash evaporation tanks and the plurality of concentrated water flash evaporation tanks are connected in series to form 'multistage' flash evaporation in the term of traditional distillation; the multi-effect membrane distillation process and the multistage flash evaporation process are coupled, secondary steam generated by membrane distillation is used for heating material liquid seawater, high-temperature concentrated seawater and product water which are discharged by membrane distillation are subjected to flash evaporation stage by stage, and the flash-off steam is used for heating material liquid seawater, so gradient utilization of energy and double concentration of the material liquid are realized, vaporized latent heat is effectively recovered, and heat efficiency, water making ratio and concentration ratio of a system are increased.

The invention relates to a sectional multiple-effect distillation seawater desalination process by supplementing preheated seawater via a water-water heat exchanger, and belongs to the technology field of multiple-effect distillation seawater desalination. The process comprises the steps of dividing an evaporator into a plurality of sections, leading out the final-effect condensed products fresh water and concentrated seawater in a high-temperature section, and supplementing preheated seawater via a water-water heat exchanger to reduce the degree of supercooling of the supplemented water entering into the high-temperature section of the evaporator, so as to solve the key restriction factor troubling the MED system design, and effectively improve the heat economical efficiency of the system. The final-effect secondary steam from the high-temperature section of the evaporator is introduced into an adjacent low temperature section of the evaporator as a heating steam, so as to recycle the latent heat of the steam. Therefore, the inventive process can adopt more effects, larger operating temperature range, and higher water generation ratio.

The invention discloses a solar line focusing-wind energy synergetic ultrasonic sea water desalting device and method. The device comprises an air pressurizing and energy storing device of a wind turbine and a heat storage and assistant heating device. The air pressurizing and energy storing device of the wind turbine and the heat storage and assistant heating device are respectively connected with an atomizing and humidifying device through pipelines. The atomizing and humidifying device is connected with an energy circulating device. The heat storage and assistant heating device is connected with a fixed strip-type mirror solar focuser. By adopting synergetic operation of wind energy and solar energy, a hydrodynamic ultrasonic fog generator accelerates evaporation of sea water in an evaporation chamber. The whole system is almost driven by novel energy sources. The device disclosed by the invention has good water yield and requires very low energy consumption, and can operate independently in seasons with wind but without sunlight and seasons with sunlight but without wind. The device is a good sea water desalting choice for remove areas and has good economic and environmental benefits.

The invention relates to a multi-effect distillation seawater desalinating device of a multi-section type condenser, belonging to the technical field of seawater desalinization. The device comprises an evaporator, a condenser, a working steam inlet (1), a working steam condensate water outlet (2), a concentrated seawater connecting pipe (4), a condensed fresh water connecting pipe (5), a concentrated seawater draining pump (9), a fresh water draining pump (10), a secondary steam inlet condensing pipe (11), a seawater inlet (13), a cooling seawater draining port (14) and a seawater inlet branchpipe (16). The invention is characterized in that the condenser is divided into N sections from section 1 to section N, and seawater enters in the multi-section type condenser from the section N to the section 1 which are connected in series; on the basis of an original M-effect evaporator, an N-1-effect evaporator which corresponds to the N-section condenser is additionally arranged on the evaporator; secondary steam coming out of the original M-effect evaporator is divided into two paths and enters the 1-effect condenser and the M+1-effect evaporator in parallel, and so forth,, the secondary steam coming out of the M+N-1-effect evaporator enters the N-effect condenser finally. On the premise of not increasing the quantity of inlet seawater of unit water making quantity, the invention can increase the total temperature difference of the first evaporator and the last evaporator.

The invention provides a multi-energy coupled seawater desalting system. The multi-energy coupled seawater desalting system is characterized by comprising a residual heat extraction device, a capillary stand pipe evaporator, a capillary driving evaporator, a sun focusing device, a solar evaporator, an air compressor, a wind turbine and a steam injector, wherein the residual heat extraction device is connected with a residual heat working medium conveying pipe and is connected with the capillary stand pipe evaporator; the capillary stand pipe evaporator is connected with a primary steam inlet of the capillary driving evaporator; the capillary driving evaporator is provided with the primary steam inlet, a seawater inlet, a seawater outlet, a secondary steam outlet and a fresh waster outlet; the sun focusing device is used for focusing solar to the solar evaporator; seawater is introduced into the solar evaporator through a seawater pipe; the solar evaporator is connected with a steam inlet of the air compressor through a steam pipe; the air compressor is connected with the wind turbine, and a steam outlet of the air compressor is connected with a high-pressure steam inlet of the steam injector; a primary steam outlet of the steam injector is connected with the primary steam inlet of the capillary driving evaporator.

The invention relates to the technical field of seawater desalination, in particular to an automatic backwashing and filtering device and method of a low-temperature multi-effect distillation seawater desalination system, the IPC classification number is C02F, the automatic backwashing and filtering device comprises a shell, an automatic control device, a water inlet pipeline, a water outlet pipe, a blow-off pipe and a filtering device body, the automatic control device is connected to one side of the shell, the water inlet pipeline is arranged at the front end of the shell, and the blow-off pipe is arranged at the rear end of the shell; the two ends of the water inlet pipeline are connected with the upper end and the lower end of the shell respectively, the water outlet pipe and the blow-off pipe are connected to the two sides of the shell respectively, and the filtering device is installed in the shell. A first water chamber and a second water chamber are arranged in the shell. The upper water inlet and distribution device and the lower water inlet and distribution device are used for independently supplying the dual-modular filtering device which is standby for each other, the backwashing effect is remarkably improved by utilizing a combined action mode of overclocking oscillation, cyclone filter screens and aeration disturbance, and the device has the advantages of shortening the shutdown time, being high in automation degree, stable in operation performance, capable of realizing online continuous operation and remarkable in effect.

The invention discloses a high-power concentration distillation desalting system and a high-power concentration distillation desalting method based on an induced crystallization method. The system comprises an evaporator, a condenser, a mother liquid tank, a crystal seed tank, a cyclone, a pump, a valve, and others. When the device is started, an induced crystal seed with the same or approximate scale crystal nucleus is fed in seawater through the crystal seed tank; thus the separated crystal scale formed during the evaporation process is preferentially attached on the surface of the induced crystal seed, thus deposition towards a heat exchange face is blocked; after normal running, mother liquid containing induced crystal grain backflows to a compulsory circular pipeline through the cyclone and the mother liquid tank, and conveys to every efficient evaporator by the compulsory circular pipeline to induce crystal seed; the induced crystal is not required to add. According to the method, the whole flow does not need to add chemical scale inhibitor, the additional influence of chemical scale inhibitor on the environment can be completely removed; meanwhile, the high-power concentration distillation desalting system can realize high power concentration, and greatly reduce raw material seawater intake and reduce the running power consumption on the basis of confirmed water load.

The invention provides a low-temperature multi-effect seawater desalting system and desalting method. Before raw materials enter a low-temperature multi-effect distillation system, when the raw material temperature is lower than the set temperature of materials entering a tail effect group of evaporators, the raw materials are preheated through a concentrated seawater heat exchanger, so that the raw materials reach the preset value when entering the evaporators; different-effect ingredient sections are used for feeding; concentrated water in the later effect group of evaporators is subjected to heat exchange with concentrated water recovered by the first effect group of evaporators through a concentrated water heat exchanger and enters the front effect group of evaporators. The problem of low material sea water recovery rate of the conventional parallel feeding flow process can be solved; the chemical adding and electric consumption cost is reduced; the defects of a conventional process mode are overcome; in addition, the heat efficiency of a low-temperature multi-effect desalting system is further improved; the equipment investment and operation cost is reduced; the technical flow process has the advantages of high water preparation ratio, high material water recovery rate, low electricity consumption, high heat efficiency, low equipment investment, low operation cost and the like.

The invention provides an energy comprehensive utilization method and system for coupling flue gas white plume elimination with sea water desalination. The system mainly comprises a thermal power plant thermodynamic system, a flue gas white plume elimination and heat removal system and a low-temperature seawater desalination system. The method comprises following steps: flue gas exhausted by a boiler sequentially is introduced into a cooler after passing through a dust remover and a desulfurizing tower, more than 90% of water vapor in the flue gas is condensed and separated out, and then is discharged through a chimney, and flue gas white plume elimination of the desulfurized flue gas is achieved; main steam generated by the boiler is exhausted into the condenser after acting in a steam turbine, in the condenser, seawater is adopted for cooling, most of the seawater is exhausted back to the sea after being heated, and a small part of the seawater is treated and then is conveyed into aseawater desalination preheating system, and finally is introduced into a low-temperature multi-effect evaporation module to generate fresh water; a low-temperature heat source required by the low-temperature multi-effect evaporation is provided by a heat pump in the flue gas white plume elimination and heat removal system, and low-temperature extraction gas of a steam turbine is taken as a heat pump driving heat source. The method is capable of organically combining flue gas white plume elimination water extraction and seawater desalination, ingeniously combining the two processes into a whole, achieving dual benefits of environmental protection and energy conservation, and is promising in application prospect.

The invention discloses a cleaning method of a seawater desalination device. The seawater desalination device comprises an n-effect evaporator, a brine pump and a seawater booster pump, each effect evaporator in the n-effect evaporator is provided with seawater spraying pipelines and a strong brine pipeline communicating with liquid sprayed by the seawater spraying pipelines, The cleaning method comprises the following steps that a pickling solution is injectied into the strong brine pipeline between two adjacent evaporators from the second-effect evaporator to the n-effect evaporator to enable the pickling solution to sequentially flow through the brine pump and the seawater booster pump and then sprayed into the second-effect evaporator to the n-effect evaporator through seawater spraying pipelines, and the pickling solution is in contact with the outer walls of heat exchange pipes in the second-effect evaporator to the n-effect evaporator. According to the cleaning method of the seawater desalination device, water scales on the heat exchange pipe on the brine side of the evaporators in the seawater desalination device, heat exchange pipe plates and the inner walls of the evaporators can be effectively removed, a good cleaning effect is achieved, and the seawater desalination water production ratio is greatly increased.

The invention provides a medical injection water preparation system and a control method thereof. The medical injection water preparation system comprises a preparation unit and a control unit, wherein the preparation unit is used for preparing medical injection water; the control unit is arranged in the preparation unit and used for controlling and adjusting the preparation unit in the working process, so that in the medical injection water preparation system, the pressure of a steam generator is kept at 0.4-0.8 MPa, and the liquid level is kept at 5-35 cm; steam ejected from a steam outlet of a steam ejector is maintained to be saturated steam with a temperature of 112-125 DEG C; the temperature drop between two adjacent falling film evaporators is kept at 3-5 DEG C; and the water production ratio of qualified product water of the medical injection water preparation system is not less than 8. The system has the beneficial effects that the overheating phenomenon existing after pure water steam and supplementary steam are mixed is overcome, and the problem that the heat efficiency of the first-effect evaporator is insufficient due to elimination of the steam superheat degree is solved; and possible pipe emptying, pipe submerging and other bad working conditions in the system are eliminated, and high operation stability and ideal water production efficiency of the injection water preparation system are guaranteed.