CN-122010360-A - Double-membrane method sea water desalination and reclaimed water device and method

CN122010360ACN 122010360 ACN122010360 ACN 122010360ACN-122010360-A

Abstract

The invention discloses a device and a method for desalinating seawater and regenerating water by a double-membrane method, in particular to the field of water treatment, which comprises an ultrafiltration unit and a reverse osmosis unit, wherein the ultrafiltration unit is longitudinally arranged and is communicated with the reverse osmosis unit which is transversely arranged through a bent pipe, the water inlet end of the ultrafiltration unit is fixedly communicated with a T-shaped pipe, the left side port of the T-shaped pipe is fixedly communicated with a first water inlet pipe through a flange, the right side port of the T-shaped pipe is fixedly communicated with a second water inlet pipe through a flange, and a switching valve is fixedly installed on the T-shaped pipe. The T-shaped pipe can realize independent water inlet or combined water inlet switching of the first water inlet pipe and the second water inlet pipe through the switching valve, the first water inlet pipe can be connected with the seawater to be treated, the second water inlet pipe can be connected with the raw water of the reclaimed water, the independent treatment or the mixed treatment of the two water sources is realized through the opening adjustment of the switching valve, the double-condition operation requirements of seawater desalination and reclaimed water preparation are met, and therefore the effect of water inlet source from switching is achieved.

Inventors

LING JIANJUN
WANG LING
WU BIN
LI YUAN
DU MINGHAO
LIU HUIPING
ZHANG DONG
QIAO LIMIN

Assignees

中凌水环境设备(云南)有限公司
凌志装备股份有限公司
江苏凌志环保工程有限公司
凌志环保（临泉）有限公司

Dates

Publication Date: 20260512
Application Date: 20260408

Claims (10)

1. The utility model provides a double-membrane method sea water desalination and regeneration water device, includes ultrafiltration unit (10) and reverse osmosis unit (11), its characterized in that, ultrafiltration unit (10) are vertical and are through return bend and the reverse osmosis unit (11) intercommunication of transversely arranging, the inlet end of ultrafiltration unit (10) is fixed to be linked together has T type pipe (12), the left side port of T type pipe (12) is through flange fixed intercommunication there being inlet tube one (14), the right side port of T type pipe (12) is through flange fixed intercommunication there being inlet tube two (15), wherein fixed mounting has diverter valve (13) on T type pipe (12), the play water end of reverse osmosis unit (11) is connected with dosing mechanism (20).
2. The double-membrane seawater desalination and regeneration water device according to claim 1, wherein the dosing mechanism (20) comprises a dosing pipe (201), the right side of the dosing pipe (201) is fixedly communicated with a water guide pipe (16) through a flange, the front side and the rear side of the dosing pipe (201) are fixedly communicated with a medicine injection pipe (202) respectively, the inside of the two medicine injection pipes (202) is connected with a push rod (203) in a sliding mode in the same direction, the inner side end of the push rod (203) is fixedly connected with a piston, the piston is attached to the inner wall of the medicine injection pipe (202), one-way valves I are fixedly arranged at the end parts of the medicine injection pipes (202), one-way valves I can only inject medicine liquid in the medicine injection pipes (202) into the medicine injection pipes (201), the left side of the medicine injection pipes (202) is fixedly communicated with a medicine inlet pipe (204), the other end of the medicine inlet pipe (204) is fixedly communicated with a medicine storage barrel (205), two-way valves II are fixedly arranged on the outer sides of the medicine inlet pipes (202), and the two-way valves II limit the medicine inlet pipe (204) to be capable of discharging medicine liquid into the medicine injection pipes (202).
3. The double-membrane seawater desalination and regeneration device according to claim 2, wherein the left side and the right side of the inside of the dosing tube (201) are respectively and fixedly connected with a fixed ring (206), the inside of the fixed ring (206) is fixedly connected with a cross bracket, the circle centers of the two cross brackets are jointly connected with a rotating shaft (207) through bearing rotation, the left side end part of the rotating shaft (207) is fixedly connected with an impeller (208), and the outside of the rotating shaft (207) is fixedly connected with a stirring paddle (212).
4. A double-membrane seawater desalination and regeneration device according to claim 3, wherein the left side of the dosing pipe (201) is fixedly communicated with an inclined pipe (213) through a flange, and the left side of the inclined pipe (213) is fixedly communicated with the water outlet end of the reverse osmosis unit (11) through a flange.
5. The double-membrane seawater desalination and regeneration device according to claim 4, wherein a disc (209) is fixedly connected to the right end of the rotating shaft (207), a connecting rod deviating from the center is fixedly connected to the right side of the disc (209), a pair of connecting rods (210) which are symmetrically distributed front and back are hinged to the outer sides of the connecting rods, L-shaped rods (211) are hinged to the other sides of the two connecting rods (210) respectively, the L-shaped rods (211) are divided into transverse rods and vertical rods which are perpendicular to each other, the vertical rods penetrate through a dosing pipe (201) and the surface of the dosing pipe (201) is in sliding connection with the vertical rods through sealing sleeves, and the transverse rods are fixedly connected with corresponding side push rods (203).
6. The double-membrane seawater desalination and regeneration water device according to claim 5, wherein a drug discharging mechanism (30) is arranged in the drug feeding tube (201), the drug discharging mechanism (30) comprises a pair of transfer boxes (301) fixedly connected to the front side and the rear side of the inside of the drug feeding tube (201), the transfer boxes (301) are communicated with drug outlets of the drug feeding tube (202), connecting tubes (302) are fixedly connected to the inner sides of the two transfer boxes (301), annular tubes (315) are fixedly connected to the inner sides of the two connecting tubes (302) jointly, a group of circumferentially arranged drug outlet holes are formed in the right side of the annular tubes (315), an arc-shaped tube (303) is fixedly connected to the inner sides of the two transfer boxes (301), sealing plates (304) capable of moving left and right are connected in a sliding mode, and the sealing plates (304) are adhered to the joint surfaces of the transfer boxes (301) and the connecting tubes (302), and the connecting tubes (302) are plugged.
7. The double-membrane seawater desalination and regeneration device according to claim 6, wherein a supporting ring (305) is arranged on the outer side of the rotating shaft (207), the bottom of the supporting ring (305) is fixedly connected with a dosing tube (201) through a supporting frame, a movable ring (306) capable of moving left and right is arranged on the left side of the supporting ring (305), an annular guide rail is fixedly connected on the outer side of the movable ring (306), a rotating block (313) is rotatably connected on the outer side of the annular guide rail, a connecting rod II (312) is hinged on the outer side of the rotating block (313) through a hinging piece, a sliding block (311) is hinged on the other end of the connecting rod II (312), a sliding rail (310) is connected on the left side of the sliding block (311), a rotary table (309) is fixedly connected on the left side of the sliding rail (310), driving rods (314) are respectively fixedly connected on the front side and the rear side of the movable ring (306), the driving rods (314) comprise vertical rods and horizontal rods, the horizontal rods penetrate through corresponding transfer boxes (301) and are in sliding connection with the transfer boxes (301), and the sealing sleeves are fixedly connected with the right side of the sealing sleeves (304).
8. The double-membrane seawater desalination and regeneration device as claimed in claim 7, wherein a support spring (307) is fixedly connected to the left side of the support ring (305), and a moving ring (306) is fixedly connected to the left side of the support spring (307).
9. The double-membrane seawater desalination and regeneration device as claimed in claim 8, wherein a pair of guide rods (308) arranged front and back are fixedly connected to the left side of the support ring (305), and the guide rods (308) are respectively and slidably connected with the movable ring (306).
10. The double-membrane method sea water desalting and regenerating method is characterized by comprising the following steps: S1, respectively pumping and conveying seawater in the ocean through a water suction pump, filtering by a preliminary filter screen to remove large-volume impurities and sediment, and conveying the seawater to a first water inlet pipe (14), collecting standard reclaimed water after domestic sewage and industrial wastewater treatment, and conveying the reclaimed water to a second water inlet pipe (15), wherein the front-end rough filtration pretreatment of the two raw water is finished; S2, regulating and controlling a switching valve (13) on a T-shaped pipe (12) to finish accurate switching of a water inlet source, opening a first water inlet pipe (14) and closing a second water inlet pipe (15) when desalinating seawater independently, collecting pretreated seawater into the T-shaped pipe (12) through the first water inlet pipe (14), opening the second water inlet pipe (15) and closing the first water inlet pipe (14) when producing reclaimed water independently, collecting reclaimed water raw water into the T-shaped pipe (12) through the second water inlet pipe (15), and finely regulating the opening of the switching valve (13) to realize that seawater and reclaimed water raw water are mixed in proportion; s3, after raw water enters an ultrafiltration unit (10), the raw water flows through an internal ultrafiltration membrane element, residual suspended matters, colloid, algae, microorganisms and macromolecular organic matters in the water are accurately removed under the physical screening action of an ultrafiltration membrane, various particle impurities are intercepted, meanwhile, the membrane element of a subsequent reverse osmosis unit (11) is prevented from being polluted and damaged, and ultrafiltration treatment is carried out to obtain ultrafiltration produced water with clean water quality; S4, the ultrafiltration produced water is guided into a reverse osmosis unit 11 which is transversely arranged from a longitudinal ultrafiltration unit (10) through a connecting bent pipe, salt, calcium magnesium hardness ions, heavy metal ions and soluble micromolecular organic matters in the water are efficiently removed under the selective permeation action of a reverse osmosis membrane element, desalination and purification treatment are thoroughly completed, and desalted and clean seawater or reclaimed water purified water is obtained, and the concentrated water is singly discharged and collected through a concentrated water end of the reverse osmosis unit (11); s5, discharging purified water treated by the reverse osmosis unit (11) into a dosing mechanism (20), and adding a proper amount of liquid medicine into the dosing mechanism to regulate and stabilize water quality; S6, desalinating seawater or reclaimed water with qualified quality after complete mixing in the dosing pipe 201, and discharging the desalinated seawater or reclaimed water out of the dosing pipe, wherein the desalinated seawater can be directly used for domestic water, industrial water and irrigation water, and the reclaimed water is led into a corresponding recycling pipe network to complete the whole-flow operation from raw water extraction to advanced treatment and produced water recycling.

Description

Double-membrane method sea water desalination and reclaimed water device and method Technical Field The invention relates to the technical field of water treatment, in particular to a device and a method for desalting seawater and regenerating water by a double-membrane method. Background The double-membrane method (ultrafiltration and reverse osmosis) is a mainstream technology of current sea water desalination and reclaimed water advanced treatment, an ultrafiltration unit can effectively remove suspended matters, colloid, microorganisms and other impurities in raw water, a pre-protection effect is achieved on a reverse osmosis membrane, and a reverse osmosis unit can further remove salt, heavy metals and soluble organic matters in water, so that the deep purification of water is realized, and the method is widely applied to water treatment scenes such as coastal water supply, reclaimed water recycling and the like. The Chinese patent discloses a modular integrated water treatment device with the publication number of CN114940530B, the application date is 2022.06.10, the technology of the patent adopts a pump membrane integrated design, a traditional membrane frame is canceled, the size of the device is greatly reduced, the manufacturing cost of the device is reduced, the adaptability of the device to a use space is further improved, the requirements of customers with water treatment requirements but limited use space are met, but the water inlet end of the patent is only provided with a single water inlet pipeline, no double water source is switched into a water inlet structure, flexible switching and mixed water inlet of seawater and reclaimed water raw water cannot be realized, and the application scene is limited. Therefore, a double-membrane seawater desalination and regeneration device and method are provided to solve the problems in the background technology. Disclosure of Invention The invention aims to provide a double-membrane method sea water desalination and regeneration device and method, so as to achieve the effect of switching water inflow sources. The aim of the invention can be achieved by the following technical scheme: The double-membrane seawater desalination and regeneration device comprises an ultrafiltration unit and a reverse osmosis unit, wherein the ultrafiltration unit is longitudinally arranged and is communicated with the reverse osmosis unit which is transversely arranged through an elbow, a T-shaped pipe is fixedly communicated with a water inlet end of the ultrafiltration unit, a first water inlet pipe is fixedly communicated with a left port of the T-shaped pipe through a flange, a second water inlet pipe is fixedly communicated with a right port of the T-shaped pipe through a flange, a switching valve is fixedly installed on the T-shaped pipe, and a chemical feeding mechanism is connected with a water outlet end of the reverse osmosis unit. The medicine feeding mechanism comprises a medicine feeding pipe, wherein the right side of the medicine feeding pipe is fixedly communicated with a water guide pipe through a flange, the front side and the rear side of the medicine feeding pipe are respectively fixedly communicated with a medicine feeding pipe, the interiors of the two medicine feeding pipes are connected with a push rod in a sliding mode, the inner side ends of the push rods are fixedly connected with pistons, the pistons are attached to the inner walls of the medicine feeding pipes, one-way valves I are fixedly arranged at the end parts of the medicine feeding pipes, only medicine liquid in the medicine feeding pipes can be fed into the medicine feeding pipes, medicine feeding pipes are fixedly communicated with the left side of the medicine feeding pipes, the other ends of the medicine feeding pipes are fixedly communicated with a medicine storage barrel, one-way valves II are fixedly arranged at the outer sides of the medicine feeding pipes, and only the medicine liquid in the medicine storage barrel can be discharged into the medicine feeding pipes through the one-way valves II. As a still further scheme of the invention, the left side and the right side of the inside of the dosing tube are respectively fixedly connected with a fixed ring, the inside of the fixed ring is fixedly connected with a cross bracket, the circle centers of the two cross brackets are connected with a rotating shaft in a common rotating way through a bearing, the left end part of the rotating shaft is fixedly connected with an impeller, and the outer side of the rotating shaft is fixedly connected with a stirring paddle. As a still further proposal of the invention, the left side of the dosing pipe is fixedly communicated with an inclined pipe through a flange, and the left side of the inclined pipe is fixedly communicated with the water outlet end of the reverse osmosis unit through a flange. As a still further scheme of the invention, the right end part of the rotating shaft is fixedly c