30results about How to "Extend continuous stable operation time" patented technology

The invention relates to the field of industrial wastewater treatment, in particular to a high-concentration wastewater zero-discharging method. Accoridng to the method, a 'nanofiltration + efficient reverse osmosis + membrane distillation + evaporative crystallization' method is adopted to treat high-concentration wastewater. Firstly, nanofiltration is adopted to remove hardness, multivalent ions and parts of organic matter in the high-concentration wastewater so as to obtain nanofiltration producing water and nanofiltration concentrated water, then an efficient reverse osmosis technology is adopted to conduct deep concentration treatment on the nanofiltration producing water, deep concentration treatment is conducted on the obtained efficient reverse osmosis concentrated water through membrane distillation to obtain membrane-distillation concentrated water, further evaporative crystallization treatment is performed to enable salt solids in the membrane-distillation concentrated water to crystallize out, and centralized drying disposal is performed, wherein salt is added into the nanofiltration concentrated water to perform precipitation treatment so as to obtain calcium residues, supernate obtained after precipitation is subjected to activated carbon adsorption and then is mixed with the high-concentration wastewater, and the mixed liquid is fed into a nanofiltration unit for circular treatment. By means of the high-concentration wastewater zero-discharging method, water resources are recycled to the most degree while the problem of high-concentration wastewater discharging is solved, and zero discharging of high-concentration wastewater is basically achieved.

The invention provides a forward osmosis coupled membrane distillation wastewater treatment apparatus and a method thereof. The apparatus includes a first stage forward osmosis unit or a second stage forward osmosis unit and a membrane distillation unit. The above forward osmosis unit is composed of a forward osmosis raw water pool, a forward osmosis raw water pump, a forward osmosis membrane module, a forward osmosis driving liquid pool and a forward osmosis driving liquid pump; the membrane distillation unit is composed of a membrane distillation thick water raw water pool, a membrane distillation thick water pump, membrane distillation, a membrane distillation water heating pool, a membrane distillation thick water raw water pump, a membrane distillation water feeding pump and a membrane distillation assembly; and the forward osmosis unit is connected with the membrane distillation unit through a pipeline and a valve. The method comprises the following steps: high salinity wastewater treated by the membrane distillation unit is used as a forward osmosis driving liquid, membrane distillation thick water is diluted through continuous concentration of forward osmosis feeding liquid side raw water, the diluted membrane distillation thick water returns to the membrane distillation unit and is continuously treated, and above steps are cycled. The apparatus and the method effectively solve the treatment problem of the membrane distillation thick water, and maximally recover the water resource in the wastewater.

The invention relates to the field of industrial wastewater treatment, in particular to a high-salinity high-hardness wastewater zero-discharging method. According to the method, a 'microfiltration and hardness removal + efficient reverse osmosis + membrane distillation + evaporative crystallization' method is adopted to treat high-salinity high-hardness wastewater. Firstly, a microfiltration and hardness removal technology is adopted to remove hardness of the high-salinity high-hardness wastewater, then an efficient reverse osmosis technology is adopted to further concentrate the wastewater without hardness so as to obtain efficient reverse osmosis producing water and efficient reverse osmosis concentrated water, deep concentration is conducted on the efficient reverse osmosis concentrated water through membrane distillation to obtain membrane-distillation producing water and membrane-distillation concentrated water, evaporative crystallization treatment is further conducted on the membrane-distillation concentrated water to enable salt solids in the concentrated water to crystallize out, and centralized drying disposal is performed. The efficient reverse osmosis producing water, the membrane-distillation producing water and evaporative-crystallization producing water produced in the treating process can be reused for a production process, water resources are recycled to the most degree while the problem of wastewater discharging is solved, and zero discharging of high-salinity high-hardness wastewater is basically achieved.

The invention discloses a novel solar energy reduced-pressure multiple-effect membrane distillation apparatus, and aims to utilize solar energy to replace conventional electrical heating as a heat source and heat a raw material fluid to reach a goal of saving energy and reducing consumption. A set of simple Venturi system is used to replace a vacuum pump which is used in the reduced-pressure multiple-effect membrane distillation, so that energy consumption in a membrane distillation operation process is further reduced, and 100% collection of produced water is realized, and the membrane flux is improved. The application of multiple-effect membrane components realizes the effective utilization of phase transformation heat of a water vapor, and the heat-utilization rate is improved. The novel Venturi-solar energy reduced-pressure multiple-effect membrane distillation system is adopted, so that the total energy consumption and the operation cost in the membrane distillation process are greatly reduced.

The invention provides a zero release device of high-salt high-ammonia-nitrogen waste water. The zero release device is mainly used for solving problems of conventional devices that discharge standards are not reached, and water resource recovery rate is low in high-salt high-ammonia-nitrogen waste water treatment. The zero release device is a membrane coupling device, and mainly comprises a membrane absorption unit, a nanofiltration unit, a forward osmosis unit, and a cooling crystallization unit; the membrane absorption unit is connected with the nanofiltration unit, the nanofiltration unit is connected with the forward osmosis unit, the forward osmosis unit is connected with the membrane absorption unit and the cooling crystallization unit, and a plurality of circulation loops are formed via connection of the units. The zero release device is easy for operation, and is easy for realization. The zero release device can be used for solving processing problems of high-salt high-ammonia-nitrogen waste water effectively, water recovery rate is high, and quality of obtained water is high. The zero release device is used for circulating condensation of high-salt high-ammonia-nitrogen waste water, almost no concentrated water is discharged, and recovery of water resource of high-salt high-ammonia-nitrogen waste water is realized as far as possible.

The invention provides an electrical tar precipitator. The electrical tar precipitator comprises a tar precipitator body, a power supply porcelain insulator box, a high-tension porcelain insulator, a high-voltage corona wire, a sealing assembly and a spray device, wherein the high-tension porcelain insulator is arranged in the power supply porcelain insulator box; the high-voltage corona wire is arranged in the tar precipitator and connected with the high-tension porcelain insulator; the power supply porcelain insulator box is arranged above the tar precipitator body; the sealing assembly is arranged below the high-tension porcelain insulator and used for preventing air in the tar precipitator body from entering the power supply porcelain insulator box; the spray device comprises a spray tube and a reservoir, wherein the reservoir stores liquid for cleaning the high-voltage corona wire; and the spray tube is used for communicating the reservoir with the upper part of the tar precipitator body. The electrical tar precipitator provided by the invention has the characteristics of capacity of continuously and stably running for a long time, long service life, convenience for maintenance, easiness for operation and the like.

The invention belongs to the technical field of extraction and purification processing equipment in the field of uranium purification and production, and particularly relates to a method for fixing sieve plates of a pulse sieve plate column. According to the method for fixing the sieve plates of the pulse sieve plate columns, transverse fixing of the sieve plates is achieved through a central rod, pull rods and the like so that a gap between a column body and a plate string can be reduced, and mass transfer is sufficiently achieved. Radial fixing of the sieve plates is achieved through the pull rods and pull rod pipe spacers so that it can be guaranteed that the sieve plates are not prone to deformation, and mixed mass transfer is stable. Longitudinal fixing of the sieve plates is achieved through central pipe spacers, so that it is guaranteed that the distances between the sieve plates are equal, and mixed mass transfer is stable.

The invention provides a system for recovering a natural fiber crystallized and modified gaseous phase medium on basis of multi-bus and multi-modification reactor parallel operation. The system comprises a vacuum bus, a gaseous phase medium compression bus, n modification reactors which are connected to the vacuum bus and the gaseous phase medium compression bus in parallel, vacuum branches which are connected onto the vacuum bus in parallel, a first-level compression branch which is connected onto the gaseous phase medium compression bus in parallel, a second-level compression branch which is connected onto the first-level compression branch in series and a plurality of valves, wherein n is not less than 1. The invention further provides a method for recovering the natural fiber crystallized and modified gaseous phase medium on basis of multi-bus and multi-modification reactor parallel operation. The method comprises natural recovering, first-level compression recovering, medium vacuumizing and first-level compression recovering and second-level compression recovering. By the system and method, the modified medium is completely recovered, efficiently condensed and circularly used, so that a non-pollution and zero emission modifying process is realized, energy is saved and consumption is reduced; and the system and the method have the advantages that a set of medium recovering equipment serves a plurality of modification reactors, the modification reactors operate in parallel, the utilization rate and production efficiency of the equipment are increased, the equipment cost and the production cost are lowered.