CN118206246A

CN118206246A - Iodine contrast agent hydrolysate waste water concentration extraction processing system

Info

Publication number: CN118206246A
Application number: CN202410517837.7A
Authority: CN
Inventors: 陶杰; 张锋; 李勇; 刘猛
Original assignee: Konano Fluid Technology Hangzhou Co ltd
Current assignee: Konano Fluid Technology Hangzhou Co ltd
Priority date: 2023-03-15
Filing date: 2023-03-15
Publication date: 2024-06-18
Also published as: CN116216997B; CN116216997A

Abstract

The invention relates to the technical field of pharmaceutical chemistry wastewater treatment, and particularly discloses an iodine contrast agent hydrolysate wastewater concentration and extraction treatment system, which comprises a first tank body (1), wherein a sedimentation plate (3) is arranged at a position, close to the top, of the inner side of the first tank body (1), and an adjusting component (4) and a separation plate (5) are fixedly arranged at a position, below the sedimentation plate (3), of the inner side of the first tank body (1); the novel ultrafiltration membrane tank is characterized in that a built-in barrel (11) is fixedly connected to the bottom of the inner side of the first tank body (1), the top of the built-in barrel (11) is inserted into the bottom of the isolation plate (5), and an ultrafiltration membrane system (6) is arranged at the bottom of the inner side of the built-in barrel (11). The invention has the characteristics of simple operation, continuity and suitability for industrialization.

Description

Iodine contrast agent hydrolysate waste water concentration extraction processing system

Technical Field

The invention relates to the technical field of pharmaceutical chemistry wastewater treatment, in particular to an iodine contrast agent hydrolysate wastewater concentration and extraction treatment system.

Background

The non-ionic iodine contrast agent is a non-ionic contrast agent and has the characteristics of good water solubility, low osmotic pressure, stable chemical property and high-temperature sterilization resistance. The nonionic iodine contrast agent is mainly used for various angiography radiography examinations, including: cerebral angiography, peripheral arterial angiography, visceral arterial, renal arterial and aortic angiography, etc. The hydrolysate of ioversol, iodixanol, iopromide, iohexol, iopamidol and the like can be used as an organic synthesis intermediate and a medical intermediate, and is mainly used as a raw material intermediate of contrast agents of ioversol, iopromide, iohexol, iopamidol and the like in the research and development process of a laboratory and the chemical medicine synthesis process. A large amount of waste water can be generated in the process of producing hydrolysates such as ioversol, iodixanol, iopromide, iohexol and iopamidol, wherein the hydrolysates such as ioversol, iopromide, iohexol and iopamidol can be recycled, and the treated waste water reaches the standard for discharge or reuse.

At present, the method for extracting hydrolysates such as ioversol, iodixanol, iopromide, iohexol and iopamidol in the production process mainly comprises a continuous electrodialysis method, a reverse dialysis method, macroporous adsorption resin, continuous repeated crystallization and other methods, and has the defects of difficult control of conditions, complex operation, more impurities, unobvious effect, low yield, long production process period, more waste liquid, low purity and the like.

The patent document with publication number CN106673263a discloses a method for treating contrast agent in wastewater, comprising the steps of: a) Mixing the contrast agent-containing wastewater with nano zero-valent iron for reaction to obtain treated wastewater; the nano zero-valent iron can rapidly and efficiently remove the contrast agent in the wastewater, and experimental results show that: when the method provided by the invention is used for treating the diatrizoic acid sodium solution with the concentration of 20mg/L, the diatrizoic acid sodium can be completely degraded within 36 hours. However, pure water can not be reused after wastewater treatment, and the recycling rate is not high enough.

Patent document with publication number CN112759018a discloses a wastewater treatment apparatus, which in the solution of the invention comprises a separator, a wastewater storage area, a distillate storage area and a concentrate area; the condenser is used for introducing steam after heat exchange of the heater, and although the scheme of the invention can intercept and defog the waste water steam generated by the heater, the pipeline is simple and convenient to install, the installation is completed only by connecting a small amount of pipelines, the installation efficiency and the installation accuracy are improved, but the mixing efficiency of alkali liquor and waste liquor cannot be improved, the partial difference of alkali liquor content of upper and lower liquid layers of the waste liquor exists, the self-cleaning function is not achieved, and meanwhile, the severely blocked or partially broken ultrafiltration membrane cannot be cleaned and replaced, and the real filtering effect and performance of the ultrafiltration membrane cannot be exerted.

Disclosure of Invention

The invention provides a concentration and extraction treatment system for the iodine contrast agent hydrolysate wastewater, which aims to solve the technical problems existing in the existing iodine contrast agent hydrolysate wastewater treatment process and has the characteristics of simplicity in operation, continuity and suitability for industrialization.

The first technical scheme of the invention is as follows: the iodine contrast agent hydrolysate wastewater concentration and extraction treatment process comprises the following steps,

(A) Pretreatment of hydrolysate wastewater;

(b) Adding alkali to adjust the pH;

(b1) Adding alkali liquor into the wastewater pretreated in the step (a), and stirring and mixing;

(b2) Stopping adding alkali liquor when the pH value of the mixed liquor in the step (b 1) is 7-12;

(c) Wastewater concentration treatment

(C1) Passing the pH-adjusted mixed solution in the step (b 2) through an ultrafiltration membrane system;

(c2) Sequentially passing the permeate liquid in the step (c 1) through a primary nanofiltration membrane system and a secondary nanofiltration membrane system;

(c3) Sampling and detecting the permeate in the step (c 2), and if the permeate meets the standard, performing the next stage of treatment; if the standard is not met, returning to the step (c 1) to continue the treatment;

(c4) Concentrating the concentrated solution in the step (c 1) and the concentrated solution in the step (c 2) for standby;

(d) Adding acid to adjust pH

(D1) Adding the concentrated solution in the step (c 4) into an acid regulating tank and stirring;

(d2) Adding acid into the acid regulating tank in the step (d 1), stirring, stopping adding acid when the pH value of the concentrated solution is 3-6, and standing;

(e) Precipitated crystals

(E1) Transferring the concentrated solution with the pH adjusted in the step (d 2) into a crystallization kettle, and adding seed crystals into the crystallization kettle;

(e2) Standing the concentrated solution after the seed crystal is added in the step (e 1), and standing until crystallization is separated out;

(f) Extraction of hydrolysate solids

(F1) Delivering the solid-liquid mixture after crystallization in the step (e 2) to a solid-liquid separation system;

(f2) Stopping feeding after filling the solid-liquid separation system in the step (f 1) and maintaining the pressure;

(f3) After the pressure maintaining in the step (f 2) is completed, sequentially performing pressure relief, discharging and weighing;

(f4) Delivering the solid weighed in the step (f 3), and refining;

(g) Membrane system produced water treatment

(G1) Sending the permeate liquid reaching the standard in the step (c 3) into an evaporation crystallization system;

(g2) Detecting the crystallized salt obtained after the evaporation and crystallization in the step (g 1), and if the crystallized salt is qualified, carrying out delivery treatment; if not, returning to the step (g 1) again;

(g3) Detecting the water evaporated and condensed in the step (g 1), and if the water reaches the standard, returning the water as reuse water for reuse; if the standard is not met, returning to the step (g 1) again. The invention firstly carries out pretreatment on the hydrolysate wastewater to remove floaters, suspended matters, sediments and the like, thereby ensuring that the hydrolysate such as ioversol, iodixanol, iopromide, iohexol, iopamidol and the like which are finally extracted has higher purity; according to the invention, the pH value of the mixed solution is regulated to be in a proper alkaline range by alkali liquor, so that ioversol, iodixanol, iopromide, iohexol, iopamidol and the like in hydrolysate wastewater can be converted into salt forms, and the ioversol, the ioversol and the like can be conveniently extracted with better yield and purity; according to the invention, substances such as ioversol, iodixanol, iopromide, iohexol and iopamidol which exist in a salt form sequentially pass through an ultrafiltration membrane system, a primary nanofiltration membrane system and a secondary nanofiltration membrane system, so that the required substances can be completely trapped as much as possible, and the better yield is achieved; detecting the finally passed permeate liquid, wherein only permeate liquid with the concentration lower than the standard value can be subjected to subsequent next-stage treatment, and ultrafiltration and nanofiltration interception treatment are required to be performed again when the concentration of the permeate liquid is higher than the standard value, so that the required substances in the wastewater can be intercepted and extracted as completely as possible; the pH of the concentrated salt is adjusted to a proper acid range by adjusting acid, so that the crystallized salt can exist in the form of ioversol, iodixanol, iopromide, iohexol and iopamidol again after hydrolysis, and the purposes of high yield and high purity extraction are achieved; the crystallization method can be used for a plurality of crystallization modes, one of which is a mode of adding seed crystals, so that the ioversol, iodixanol, iopromide, iohexol and iopamidol obtained after hydrolysis can be better separated out in a crystal form; the invention adopts a pressurized solid-liquid separation mode, so that the crystals such as ioversol, iodixanol, iopromide, iohexol and iopamidol which are finally extracted from the wastewater are prepared in a solid form; the invention adopts the evaporation crystallization mode to re-extract the crystallization salt in the permeate liquid, thereby ensuring that the crystals of ioversol, iodixanol, iopromide, iohexol, iopamidol and the like in the wastewater are fully and completely extracted; wherein, a detection mode is adopted to ensure that the finally prepared crystal salt is a substance meeting the standard; the condensed water is also detected, and when the cleanliness of the condensed water reaches the standard, the condensed water is recycled, so that the pure water can be recycled after wastewater treatment, and solvents such as methanol and the like are not used, so that the pollution to the environment is greatly reduced, the recycling rate is higher, and the economic value is also higher.

Preferably, the hydrolysate wastewater pretreatment comprises the steps of,

(A1) The hydrolysate wastewater is sent into a first tank body;

(a2) Starting a pretreatment system, and pretreating the hydrolysate wastewater in the first tank body in the step (a 1) through the pretreatment system. The pretreatment system can well remove solid particles, floaters, suspended matters, sediments and the like.

Preferably, the pretreatment system in the step (a 2) is a sedimentation tank, a plate-and-frame filter press, a filter or a centrifuge. The pretreatment system can flexibly select a more proper structure according to the needs.

Preferably, the wastewater pretreated in the step (a 2) is sent to a first tank body.

Preferably, in the step (b 1), stirring and mixing are performed by a mixing component. The mixing component can realize the full mixing of the alkali liquor and the pretreated wastewater, so that ioversol, iodixanol, iopromide, iohexol, iopamidol and the like in the pretreated wastewater exist in the form of salt as completely as possible.

Preferably, the alkali liquor in the step (b 1) is added by an alkali adding metering pump. The alkali adding metering pump can accurately control the alkali adding amount according to the requirement, so that the best effect is achieved.

Preferably, the membrane pore diameter in the ultrafiltration membrane system is 0.03um to 0.2um. More preferably, the membrane pore diameter in the ultrafiltration membrane system is 0.05um to 0.15um. More preferably, the membrane pore diameter in the ultrafiltration membrane system is 0.08um to 0.12um. More preferably, the membrane pore size in the ultrafiltration membrane system is 0.1um. The limiting of the membrane aperture in the ultrafiltration membrane system can effectively intercept insoluble substances meeting the requirements.

Preferably, the ultrafiltration membrane in the ultrafiltration membrane system is a hollow fiber membrane, a flat plate membrane or a tubular membrane. The hollow fiber membrane, the flat plate membrane or the tubular membrane is selected to have good interception effect, and has better self quality and longer service life.

Preferably, the ultrafiltration membrane in the ultrafiltration membrane system is an acid-alkali-resistant solvent-resistant ultrafiltration membrane.

Preferably, the molecular weight cut-off of the primary nanofiltration membrane system is 500 Da-1000 Da. More preferably, the molecular weight cut-off of the primary nanofiltration membrane system is 550Da to 950Da. More preferably, the molecular weight cut-off of the primary nanofiltration membrane system is 600Da to 900Da. More preferably, the molecular weight cut-off of the primary nanofiltration membrane system is 650Da to 850Da. More preferably, the molecular weight cut-off of the primary nanofiltration membrane system is 700Da to 800Da. More preferably, the primary nanofiltration membrane system has a molecular weight cut-off of 750Da. The limiting of the membrane aperture in the primary nanofiltration membrane system can effectively intercept smaller particle salt meeting the requirements.

Preferably, the molecular weight cut-off of the secondary nanofiltration membrane system is 100Da to 500Da. More preferably, the molecular weight cut-off of the secondary nanofiltration membrane system is 150Da to 450Da. More preferably, the molecular weight cut-off of the secondary nanofiltration membrane system is 200Da to 400Da. More preferably, the molecular weight cut-off of the secondary nanofiltration membrane system is 250Da to 350Da. More preferably, the molecular weight cut-off of the secondary nanofiltration membrane system is 300Da. The limiting of the membrane aperture in the primary nanofiltration membrane system can effectively intercept small-particle salt meeting the requirements.

Preferably, the nanofiltration membrane in the primary nanofiltration membrane system and the secondary nanofiltration membrane system is a roll membrane, a hollow fiber membrane, a tubular membrane or a flat membrane. The roll type membrane, the hollow fiber membrane, the tubular membrane or the flat membrane are selected to have good interception effect, and have better self quality and longer service life.

Preferably, the nanofiltration membrane in the primary nanofiltration membrane system and the secondary nanofiltration membrane system is made of polyamide PA, polyimide PI, cellulose acetate CA, sulfonated polysulfone SPS, sulfonated polyether sulfone SPES, polyvinyl alcohol PVA or inorganic materials.

Preferably, the nanofiltration membrane in the primary nanofiltration membrane system and the secondary nanofiltration membrane system is an acid-alkali-solvent-resistant nanofiltration membrane.

Preferably, the concentration in the step (c 4) is 4 to 30 times. More preferably, the concentration in the step (c 4) is 6 to 25 times. More preferably, the concentration in the step (c 4) is 8 to 20 times. More preferably, the concentration in the step (c 4) is 10 to 16 times. More preferably, the concentration in the step (c 4) is 12 to 14 times. The water content in the concentrate is reduced as much as possible.

Preferably, the time of the standing in the step (d 2) is 1 to 8 hours. More preferably, the time of the standing in the step (d 2) is 2 to 7 hours. Preferably, the time of the standing in the step (d 2) is 3 to 6 hours. Preferably, the time of the standing in the step (d 2) is 4 to 5 hours. So that the salt can be fully hydrolyzed to form ioversol, iodixanol, iopromide, iohexol and iopamidol for extraction.

Preferably, the acid in the step (d 2) is acetic acid, sulfuric acid, hydrochloric acid or phosphoric acid. The selection of the acid can be flexibly selected according to actual conditions.

Preferably, the crystallization in the step (e) is performed by freezing, adding acid, standing or seeding, or a combination of several of them. The manner of crystallization can be flexibly selected according to the need.

Preferably, the solid-liquid separation system is a centrifuge, a plate-and-frame filter press or a vacuum belt filter. The solid-liquid separation mode can be flexibly selected according to the needs.

Preferably, the evaporative crystallization system is a membrane distillation device, an MVR evaporation system or a multi-effect distillation system. The mode of evaporation crystallization can be flexibly selected according to the needs.

The second technical scheme of the invention: the iodine contrast agent hydrolysate wastewater concentration and extraction treatment system comprises a first tank body, wherein a sedimentation plate is arranged at a position, close to the top, of the inner side of the first tank body, and an adjusting component and a separation plate are fixedly arranged at a position, below the sedimentation plate, of the inner side of the first tank body; the bottom of the inner side of the first tank body is fixedly connected with an inner tank, the top of the inner tank is inserted into the bottom of the isolation plate, and the bottom of the inner side of the inner tank is provided with an ultrafiltration membrane system;

The outer surface of the first tank body is close to the right side, a second tank body is arranged on the outer surface of the first tank body, a guide pipe is connected between the second tank body and the first tank body in a flange mode, and a right end bolt of the guide pipe is inserted into the top of the second tank body; the top bolt of the second tank body is provided with a hydraulic cylinder, the bottom of the hydraulic cylinder is provided with a hydraulic rod, the inner side of the second tank body is provided with a first-stage nanofiltration membrane system, a second-stage nanofiltration membrane system, a heat insulation plate and a heat conduction plate, the first-stage nanofiltration membrane system and the second-stage nanofiltration membrane system are both arranged on the inner side of the second tank body, and the heat insulation plate and the heat conduction plate are both fixedly connected to the inner side wall of the second tank body;

The bottom of one-level nanofiltration membrane system and second grade nanofiltration membrane system all parallel arrangement pushes away the dish, every push away the dish and all the suit is on the hydraulic stem, heat conduction dish top slidable mounting has dials the board, it is connected with the motor to dial the one end rotation of board, motor bolt installs on the inside wall of No. two jar bodies. The invention judges whether oil stains exist or not by detecting the wastewater of the hydrolysate of the iodine contrast agent; removing floating matters, suspended matters, sediments and the like in the wastewater through a sedimentation plate; inputting pretreated wastewater into a cavity between a sedimentation plate and an adjusting component, adding alkaline liquor into the cavity between the sedimentation plate and the adjusting component, uniformly stirring, and measuring the pH value; the wastewater with the pH value adjusted is treated; sequentially pumping into an ultrafiltration membrane system, a primary nanofiltration membrane system and a secondary nanofiltration membrane system which are formed by the built-in barrels, and realizing the concentration and extraction treatment of the treatment device on the iodine contrast agent hydrolysate wastewater through the operation; wherein, the wastewater filtered by the ultrafiltration membrane system is conveyed to enter a primary nanofiltration membrane system and a secondary nanofiltration membrane system for concentration and separation; wherein, the subsequent treatment process of the concentrated solution is as follows: and (3) sending the concentrated solution concentrated and separated by the ultrafiltration membrane system and the nanofiltration membrane system into an acid adding tank, and then carrying out additional processing treatment.

Preferably, a pH detector for detecting the pH value in the wastewater is inserted into the top of the first tank body. The pH of contaminants substituted during non-production is detected by a pH detector.

Preferably, a movable plate is inserted into the bottom of the inner side of the first tank body, and edges of the movable plate are sealed with the inner wall of the first tank body by a slidable seal.

Preferably, the adjusting component comprises a bottom plate fixedly connected to the inner wall surface of the first tank body, the bottom of the bottom plate is fixedly connected with a delivery pipe, and the free end of the delivery pipe penetrates through the first tank body and extends to the outer side of the first tank body.

Preferably, the mixing component is installed at the middle position of the top of the bottom plate, the motor is fixedly installed at the middle position of the bottom plate, the collecting hopper is installed at the top of the motor through threads, the top of the collecting hopper penetrates through the top of the bottom plate, and the inner side of the collecting hopper is communicated with the delivery pipe, and a drainage port is formed.

Preferably, the mixing assembly comprises a rotating rod rotatably mounted on the motor, a connector is mounted on a top bolt of the rotating rod, connecting rods are connected to the outer surfaces of the connectors in a circular array, positive stirring blades are mounted on free end bolts of the connectors, a plurality of reverse stirring blades are fixedly connected to the outer surfaces of the rotating rod and located on the inner sides of the collecting hoppers, and the mounting directions of the reverse stirring blades and the positive stirring blades are opposite. The motor is started to drive the mixing assembly to rotate at the top of the bottom plate, so that the uniform mixing degree of alkali liquor and waste liquid can be quickened, the positive stirring blade and the reverse stirring She Duixiang are combined to rotate, the alkali liquor and the waste liquid are simultaneously mixed clockwise and anticlockwise, the mixing efficiency of the alkali liquor and the waste liquid is improved, the reverse stirring of the waste water is realized by utilizing the reverse stirring blade to the inner side of the drainage port, foreign matters in the waste liquid can be prevented from directly collecting and accumulating to block the drainage port, meanwhile, the waste liquid is prevented from having local difference in the alkali liquor contained in the upper layer liquid and the lower layer liquid of the waste liquid under the action of a single stirring mode, and help is provided for further promoting the mixing of the alkali liquor and the waste liquid.

Preferably, a first booster pump for boosting the pressure of the inner side of the built-in barrel is fixedly arranged at the top of the isolation plate, an alkali liquor input pipe, a first downcomer, a blow-off pipe and a second downcomer are fixedly connected to the outer surface of the first tank body, and the alkali liquor input pipe is used for adding alkali liquor into a cavity between the sedimentation plate and the adjusting component to adjust the pH value of wastewater.

Preferably, the upper end of the first downcomer is connected into a cavity between the settling plate and the adjusting component, the lower end of the first downcomer is connected into an inner cavity of the built-in barrel, the top of the blow-down pipe is fixedly connected to the bottom of the settling plate, the free end of the blow-down pipe extends to the outer side of the first tank body, and the second downcomer is used for conveying wastewater on the settling plate into the cavity between the settling plate and the adjusting component through the liquid pumping machine. After the clear liquid after precipitation is conveyed to the inner side of the built-in barrel through the first downcomer, the self-cleaning function of the treatment device can be improved by adding clear water to the top of the sedimentation plate and combining with the starting of the motor, and the efficiency of the precipitated substances discharged from the sedimentation plate through the sewage discharge pipe is quickened by utilizing the spiral pushing of the reverse stirring blade to the liquid again.

Preferably, the ultrafiltration membrane system comprises at least two first ring groups which are stacked and installed, wherein a second ring group is stacked and installed at the bottom of the first ring group, ring plate frames which are inserted into the inner sides of the first ring group and the second ring group are respectively arranged at the bottom of the second ring group, a pocket plate is fixedly connected to the bottom of the second ring group, a plurality of small spheres are fixedly connected to the outer surface of the second ring group, ultrafiltration membranes are positioned and installed at the tops of the first ring group and the second ring group, and ultrafiltration membranes are positioned and installed at the bottom of the first ring group; the left end of guide pipe runs through a jar body and pocket board in proper order and extends to the top of pocket board. The ultrafiltration membrane system can be taken out from the inner cavity of the built-in barrel by pulling the movable plate outwards, so that the severely blocked or locally broken ultrafiltration membrane can be conveniently cleaned and replaced, the pocket plate is used as a structure for collecting filtrate, and under the guidance of the guide pipe, the wastewater enters the secondary purification step of the nanofiltration membrane; the bottom of the ultrafiltration membrane can be supported and protected through the ring plate frame, and the influence on the filter pressing effect caused by mutual adsorption and lamination of the upper surface and the lower surface of the first ring group provided with the two ultrafiltration membranes can be avoided; by using the small spheres as a contact structure between the first ring group and the second ring group in a stacked manner, the disc type membrane assembly in the ultrafiltration membrane system, which is served as the ultrafiltration membrane system, can be well realized, and the real filtration effect and performance of the ultrafiltration membrane can be exerted.

Preferably, the inner wall of the second tank body is provided with an outer guide pipe in a spiral manner, one surface of the outer guide pipe, which is close to the poking plate, penetrates through the inner wall of the second tank body and is provided with a condensation hole, one end, which is far away from the poking plate, penetrates through the inner wall of the second tank body and extends to the outer side of the second tank body, and the bottom of the inner side of the second tank body is fixedly provided with a heater. Finally, the crystals were evaporated and crystallized by a heater, and the crystals were filtered out.

The invention has the following beneficial effects:

Detecting the wastewater of the hydrolysate of the iodine contrast agent to judge whether oil stains exist or not; removing floating matters, suspended matters, sediments and the like in the wastewater through a sedimentation plate; inputting pretreated wastewater into a cavity between a sedimentation plate and an adjusting component, adding alkaline liquor into the cavity between the sedimentation plate and the adjusting component, uniformly stirring, and measuring the pH value; the wastewater with the pH value adjusted is treated; sequentially pumping into an ultrafiltration membrane system, a primary nanofiltration membrane system and a secondary nanofiltration membrane system which are formed by the built-in barrels, and realizing the concentration and extraction treatment of the treatment device on the iodine contrast agent hydrolysate wastewater through the operation; wherein, the wastewater filtered by the ultrafiltration membrane system is conveyed to enter a primary nanofiltration membrane system and a secondary nanofiltration membrane system for concentration and separation; wherein, the subsequent treatment process of the concentrated solution is as follows: and (3) sending the concentrated solution concentrated and separated by the ultrafiltration membrane system and the nanofiltration membrane system into an acid adding tank, and then carrying out additional processing treatment.

Drawings

FIG. 1 is a technical roadmap of the invention;

FIG. 2 is an overall block diagram of the system of the present invention;

FIG. 3 is a schematic view of the structure of the adjusting assembly of the present invention;

FIG. 4 is a schematic view of the structure of the partition plate of the present invention;

FIG. 5 is a schematic view of the structure of the shifting plate of the present invention;

FIG. 6 is a schematic view of the structure of the mixing assembly of the present invention;

FIG. 7 is a schematic view of the structure of the stirring blade in the present invention;

FIG. 8 is a schematic view of the structure of the present invention at the rotating rod;

FIG. 9 is a schematic diagram of the structure of the ultrafiltration membrane system of the present invention;

FIG. 10 is a schematic view of the structure of an ultrafiltration membrane according to the present invention.

The marks in the drawings are: 1-a first tank body; 2-a pH detector; 3-settling plates; 4-an adjustment assembly; 41-a bottom plate; 42-an eduction tube; 43-mixing assembly; 431-rotating rod; 432-connectors; 433-connecting rod; 434-stirring the leaves positively; 435-counter stirring blade; 44-an electric motor; 45-collecting hopper; 46-drainage port; 5-separating plates; 6-an ultrafiltration membrane system; 61-a first ring set; 62-a second ring set; 63-a ring plate frame; 64-pocket plate; 65-globules; 66-ultrafiltration membrane; 7-a movable plate; 8-a second tank body; 9-a hydraulic cylinder; 10-guiding tube; 11-a built-in barrel; 12-a first booster pump; 13-downcomer one; 14-a blow-down pipe; 15-a second downcomer; 16-a hydraulic rod; 17-a first order nanofiltration membrane system; 18-pushing a disc; a 19-second order nanofiltration membrane system; 20-heat insulation board; 21-a heat conducting plate; 22-pulling plate; 23-an outer catheter; 24-motor.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not intended to be limiting.

The iodine contrast agent hydrolysate wastewater concentration and extraction treatment process shown in fig. 1 comprises the following steps,

(A) Pretreatment of hydrolysate wastewater;

The pretreatment of the hydrolysate wastewater comprises the following steps,

(A1) The hydrolysate wastewater is sent into a first tank body;

(a2) Starting a pretreatment system, and pretreating hydrolysate wastewater in the first tank body in the step (a 1) through the pretreatment system; removing solid particles, floaters, suspended matters, sediments and the like; the pretreatment system in the step (a 2) is a sedimentation tank, a plate-and-frame filter press, a filter or a centrifuge; feeding the wastewater pretreated in the step (a 2) into a first tank;

(b) Adding alkali to adjust the pH;

(b1) Adding alkali liquor into the wastewater pretreated in the step (a), and stirring and mixing; stirring and mixing through a mixing component in the step (b 1); the alkali liquor in the step (b 1) is added through an alkali adding metering pump;

(c) Wastewater concentration treatment

(C1) Passing the pH-adjusted mixed solution in the step (b 2) through an ultrafiltration membrane system; the aperture of the ultrafiltration membrane system is 0.03um to 0.2um; the ultrafiltration membrane in the ultrafiltration membrane system is a hollow fiber membrane, a flat plate membrane or a tubular membrane;

(c2) Sequentially passing the permeate liquid in the step (c 1) through a primary nanofiltration membrane system and a secondary nanofiltration membrane system; the molecular weight cut-off of the first-order nanofiltration membrane system is 500 Da-1000 Da; the molecular weight cut-off of the secondary nanofiltration membrane system is 100Da to 500Da; nanofiltration membranes in the primary nanofiltration membrane system and the secondary nanofiltration membrane system are roll membranes, hollow fiber membranes, tubular membranes or flat membranes; the nanofiltration membrane in the primary nanofiltration membrane system and the secondary nanofiltration membrane system is made of polyamide PA, polyimide PI, cellulose acetate CA, sulfonated polysulfone SPS, sulfonated polyether sulfone SPES, polyvinyl alcohol PVA or inorganic materials;

(c4) Concentrating the concentrated solution in the step (c 1) and the concentrated solution in the step (c 2) for standby; concentrating 4-30 times in the step (c 4);

(d) Adding acid to adjust pH

(d2) Adding acid into the acid regulating tank in the step (d 1), stirring, stopping adding acid when the pH value of the concentrated solution is 3-6, and standing; the standing time in the step (d 2) is 1 to 8 hours; the acid in the step (d 2) is acetic acid, sulfuric acid, hydrochloric acid or phosphoric acid;

(e) Separating out crystals; the way of crystallization in the step (e) is freezing, adding acid for standing or seeding or a combination of several kinds;

(f) Extraction of hydrolysate solids

(F1) Delivering the solid-liquid mixture after crystallization in the step (e 2) to a solid-liquid separation system; the solid-liquid separation system is a centrifuge, a plate-and-frame filter press or a vacuum belt filter;

(f4) Delivering the solid weighed in the step (f 3), and refining;

(g) Membrane system produced water treatment

(G1) Sending the permeate liquid reaching the standard in the step (c 3) into an evaporation crystallization system; the evaporation and crystallization system is a membrane distillation device, an MVR evaporation system or a multi-effect distillation system;

(g3) Detecting the water evaporated and condensed in the step (g 1), and if the water reaches the standard, returning the water as reuse water for reuse; if the standard is not met, returning to the step (g 1) again.

The invention provides a method for extracting hydrolysates such as ioversol, iodixanol, iopromide, iohexol, iopamidol and the like in wastewater in an industrialized way and a wastewater treatment process, which are simple to operate, high in product purity, less in impurities, good in economy and suitable for industrial extraction.

The method has the advantages that the hydrolysate such as ioversol, iodixanol, iopromide, iohexol, iopamidol and the like are extracted from the wastewater, the hydrolysate has high purity, the pure water can be recycled after the wastewater is treated, the solvents such as methanol and the like are not used, the pollution to the environment is greatly reduced, the recycling rate is high, and the economic value is high.

The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system shown in fig. 2 comprises a first tank body 1, wherein a sedimentation plate 3 is arranged at a position, close to the top, of the inner side of the first tank body 1, and an adjusting component 4 and a separation plate 5 shown in fig. 3 are fixedly arranged at a position, below the sedimentation plate 3, of the inner side of the first tank body 1; the inner bottom of the first tank body 1 is fixedly connected with a built-in barrel 11, the top of the built-in barrel 11 is inserted into the bottom of the isolation plate 5, and the ultrafiltration membrane system 6 shown in figure 4 is arranged at the inner bottom of the built-in barrel 11;

The outer surface of the first tank body 1 is provided with a second tank body 8 close to the right side, a guide pipe 10 is connected between the second tank body 8 and the first tank body 1 in a flange manner, and a right end bolt of the guide pipe 10 is inserted into the top of the second tank body 8; the top bolt of the second tank body 8 is provided with a hydraulic cylinder 9, the bottom of the hydraulic cylinder 9 is provided with a hydraulic rod 16, the inner side of the second tank body 8 is provided with a first-stage nanofiltration membrane system 17, a second-stage nanofiltration membrane system 19, a heat insulation plate 20 and a heat conduction plate 21, the first-stage nanofiltration membrane system 17 and the second-stage nanofiltration membrane system 19 are arranged on the inner side of the second tank body 8, and the heat insulation plate 20 and the heat conduction plate 21 are fixedly connected on the inner side of the second tank body 8;

The bottoms of the primary nanofiltration membrane system 17 and the secondary nanofiltration membrane system 19 are respectively provided with a push disc 18 in parallel, each push disc 18 is sleeved on the hydraulic rod 16, the top of the heat conducting disc 21 is slidably provided with a poking plate 22 shown in fig. 5, one end of the poking plate 22 is rotatably connected with a motor 24, and the motor 24 is mounted on the inner side wall of the second tank body 8 through bolts.

The top of the first tank body 1 is inserted with a pH detector 2 for detecting the pH value in the wastewater. The movable plate 7 is inserted into the bottom of the inner side of the first tank body 1, and edges of the movable plate 7 are sealed with the inner wall of the first tank body 1 by adopting a slidable seal.

The adjusting component 4 comprises a bottom plate 41 fixedly connected to the inner wall surface of the first tank body 1, a delivery pipe 42 is fixedly connected to the bottom of the bottom plate 41, and the free end of the delivery pipe 42 penetrates through the first tank body 1 and extends to the outer side of the first tank body 1. The mixing component 43 shown in fig. 6 is installed in the middle position of the top of the bottom plate 41, the motor 44 is fixedly installed in the middle position of the bottom plate 41, the collecting hopper 45 is installed on the top of the motor 44 through threads, the top of the collecting hopper 45 penetrates through the top of the bottom plate 41, and a drainage port 46 is formed in the inner side of the collecting hopper 45 and communicated with the delivery pipe 42.

The mixing component 43 comprises a rotating rod 431 rotatably installed on a motor 44 and shown in fig. 8, a connector 432 is installed on the top bolt of the rotating rod 431, connecting rods 433 shown in fig. 7 are connected to the outer surface of the connector 432 in a circular array, a positive stirring blade 434 is installed on the free end bolt of the connector 432, a plurality of reverse stirring blades 435 are fixedly connected to the outer surface of the rotating rod 431 and located on the inner side of the collecting hopper 45, and the installation directions of the reverse stirring blades 435 and the positive stirring blade 434 are opposite. The top of the isolation plate 5 is fixedly provided with a first booster pump 12 for boosting the pressure inside the built-in barrel 11, the outer surface of the first tank body 1 is fixedly connected with an alkali liquor input pipe, a first downcomer 13, a blow-off pipe 14 and a second downcomer 15, and the alkali liquor input pipe is used for adding alkali liquor into a cavity between the sedimentation plate 3 and the adjusting component 4 to adjust the pH value of wastewater. The upper end of the first downcomer 13 is connected into a cavity between the sedimentation plate 3 and the adjusting component 4, the lower end of the first downcomer 13 is connected into the inner cavity of the built-in barrel 11, the top of the blow-down pipe 14 is fixedly connected to the bottom of the sedimentation plate 3, the free end of the blow-down pipe 14 extends to the outer side of the first tank 1, and the second downcomer 15 is used for conveying wastewater on the sedimentation plate 3 into the cavity between the sedimentation plate 3 and the adjusting component 4 through the liquid pumping machine.

The ultrafiltration membrane system 6 comprises at least two first ring groups 61 which are stacked and installed, wherein a second ring group 62 shown in figure 9 is stacked and installed at the bottom of the first ring group 61, ring plate frames 63 which are inserted into the inner sides of the first ring group 61 and the second ring group 62 are respectively installed at the bottom of the second ring group 62, a pocket plate 64 is fixedly connected to the bottom of the second ring group 62, a plurality of small spheres 65 are fixedly connected to the outer surface of the second ring group 62, ultrafiltration membranes 66 shown in figure 10 are respectively installed at the top of the first ring group 61 and the top of the second ring group 62 in a positioning mode, and ultrafiltration membranes 66 are also installed at the bottom of the first ring group 61 in a positioning mode; the left end of the guide tube 10 sequentially penetrates the first tank 1 and the pocket plate 64 and extends to the top of the pocket plate 64. The inner wall of the second tank body 8 is spirally provided with an outer guide pipe 23, one surface of the outer guide pipe 23, which is close to the poking plate 22, penetrates through the inner wall of the second tank body 8, a condensation hole is formed in the inner wall of the second tank body 8, one end, which is far away from the poking plate 22, penetrates through the inner wall of the second tank body 8 and extends to the outer side of the second tank body 8, and a heater is fixedly arranged at the bottom of the inner side of the second tank body 8.

Example 1:

The iodine contrast agent hydrolysate wastewater concentration and extraction treatment process comprises the following steps,

(A) Pretreatment of hydrolysate wastewater;

The pretreatment of the hydrolysate wastewater comprises the following steps,

(A1) Pumping 10 tons of ioversol hydrolysate wastewater into a first tank body;

(a2) Starting a plate-and-frame filter press, and enabling 10 tons of wastewater to pass through the plate-and-frame filter press to remove solid particles, suspended matters and the like in the wastewater; sending the pretreated wastewater into a first tank body;

(b) Adding alkali to adjust the pH;

(b1) Pumping the alkali solution into the waste water of the ioversol hydrolysate by an alkali adding metering pump, circularly stirring the waste water, and fully and uniformly mixing;

(b2) The pH value of the ioversol hydrolysate wastewater is regulated to 7 by an online pH detector, so that alkali addition can be stopped;

(c) Wastewater concentration treatment

(C1) Passing the wastewater with the pH value of 7 through an ultrafiltration membrane system with the membrane pore diameter of 0.03um, and filtering out crystals;

(c2) Sequentially passing the permeate liquid in the step (c 1) through a first-stage nanofiltration membrane system with the molecular weight cutoff of 500Da and a second-stage nanofiltration membrane system with the molecular weight cutoff of 100 Da;

(c4) Concentrating the concentrated solution in the step (c 1) and the concentrated solution in the step (c 2) for standby; concentrating to 4 times of 10 tons of wastewater, namely 2.5T, and collecting 5T for later use;

(d) Adding acid to adjust pH

(D1) Adding the 5T concentrated solution collected after treatment into an acid regulating tank, and stirring for 30 minutes;

(d2) Starting an acid adding pump, adding acetic acid into an acid regulating tank, detecting the pH value to be 3, fully stirring for 30 minutes, stopping stirring, standing for 1 hour, and intermittently stirring for 20 minutes every hour;

(f) Extraction of hydrolysate solids

(F1) Delivering the solid-liquid mixture after crystallization in the step (e 2) to a plate-and-frame filter press;

(f2) Stopping feeding after filling the solid-liquid separation system in the step (f 1), and maintaining the pressure for 4 hours;

(f4) Delivering the solid weighed in the step (f 3), and refining;

(g) Membrane system produced water treatment

Example 2:

(A) Pretreatment of hydrolysate wastewater;

The pretreatment of the hydrolysate wastewater comprises the following steps,

(A1) Pumping 10 tons of ioversol hydrolysate wastewater into a first tank body;

(a2) Starting a filter, and enabling 10 tons of wastewater to pass through the filter to remove solid particles, suspended matters and the like in the wastewater; sending the pretreated wastewater into a first tank body;

(b) Adding alkali to adjust the pH;

(b2) The pH value of the ioversol hydrolysate wastewater is adjusted to be 12 by an online pH detector, so that alkali addition can be stopped;

(c) Wastewater concentration treatment

(C1) Passing the wastewater with the pH value of 12 through an ultrafiltration membrane system with the membrane pore diameter of 0.2um, and filtering out crystals;

(c2) Sequentially passing the permeate liquid in the step (c 1) through a primary nanofiltration membrane system with the molecular weight cutoff of 1000Da and a secondary nanofiltration membrane system with the molecular weight cutoff of 500 Da;

(c4) Concentrating the concentrated solution in the step (c 1) and the concentrated solution in the step (c 2) for standby; concentrating to 30 times of 10 tons of wastewater, namely 0.33T, and collecting 0.63T for later use;

(d) Adding acid to adjust pH

(d2) Starting an acid adding pump, adding acetic acid into an acid regulating tank, detecting the pH value to be 6, fully stirring for 30 minutes, stopping stirring, standing for 30 hours, and intermittently stirring for 20 minutes every hour;

(f) Extraction of hydrolysate solids

(F1) Delivering the solid-liquid mixture separated out by crystallization in the step (e 2) into a centrifuge;

(f2) Stopping feeding after filling the solid-liquid separation system in the step (f 1), and maintaining the pressure for 24 hours;

(f4) Delivering the solid weighed in the step (f 3), and refining;

(g) Membrane system produced water treatment

Example 3:

(A) Pretreatment of hydrolysate wastewater;

The pretreatment of the hydrolysate wastewater comprises the following steps,

(A1) Pumping 10 tons of ioversol hydrolysate wastewater into a first tank body;

(b) Adding alkali to adjust the pH;

(b2) The pH value of the ioversol hydrolysate wastewater is adjusted to be 10 by an online pH detector, so that alkali addition can be stopped;

(c) Wastewater concentration treatment

(C1) Passing the wastewater with the pH value of 10 through an ultrafiltration membrane system with the membrane pore diameter of 0.1um, and filtering out crystals;

(c2) Sequentially passing the permeate liquid in the step (c 1) through a first-stage nanofiltration membrane system with the molecular weight cutoff of 800Da and a second-stage nanofiltration membrane system with the molecular weight cutoff of 300 Da;

(c4) Concentrating the concentrated solution in the step (c 1) and the concentrated solution in the step (c 2) for standby; concentrating to 20 times of 10 tons of wastewater, namely 0.5T, and collecting 1T for later use;

(d) Adding acid to adjust pH

(d2) Starting an acid adding pump, adding acetic acid into an acid regulating tank, detecting the pH value to be 4, fully stirring for 30 minutes, stopping stirring, standing for 2 hours, and intermittently stirring for 20 minutes every hour;

(f) Extraction of hydrolysate solids

(f2) Stopping feeding after filling the solid-liquid separation system in the step (f 1), and maintaining the pressure for 12 hours;

(f4) Delivering the solid weighed in the step (f 3), and refining;

(g) Membrane system produced water treatment

The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system comprises a first tank body 1, wherein a pH detector 2 for detecting the pH value in wastewater is inserted into the top of the first tank body 1, a sedimentation plate 3 is arranged at a position, close to the top, of the inner side of the first tank body 1, an adjusting component 4 and a separation plate 5 are fixedly arranged on the inner side of the first tank body 1 and below the sedimentation plate 3, a built-in barrel 11 is fixedly connected to the bottom of the inner side of the first tank body 1, the top of the built-in barrel 11 is inserted into the bottom of the separation plate 5, and an ultrafiltration membrane system 6 is arranged at the bottom of the inner side of the built-in barrel 11; the movable plate 7 is inserted into the bottom of the inner side of the first tank body 1, edges of the movable plate 7 are sealed with the inner wall of the first tank body 1 by adopting a slidable seal, the outer surface of the first tank body 1 is provided with a second tank body 8 close to the right side, a guide pipe 10 is connected between the second tank body 8 and the first tank body 1 in a flange manner, the left end of the guide pipe 10 sequentially penetrates through the first tank body 1 and the pocket plate 64 and extends to the top of the pocket plate 64, and a right end bolt of the guide pipe 10 is inserted into the top of the second tank body 8; the top bolt of the second tank body 8 is provided with a hydraulic cylinder 9, the top of the isolation plate 5 is fixedly provided with a first booster pump 12 for boosting the inside of the built-in barrel 11, the outer surface of the first tank body 1 is fixedly connected with an alkali liquor input pipe, a first downcomer 13, a blow-off pipe 14 and a second downcomer 15, and the alkali liquor input pipe is used for adding alkali liquor into a cavity between the sedimentation plate 3 and the adjusting component 4 to adjust the pH value of wastewater; the upper end of the first downcomer 13 is connected into a cavity between the sedimentation plate 3 and the adjusting component 4, the lower end of the first downcomer 13 is connected into the inner cavity of the built-in barrel 11, the top of the blow-down pipe 14 is fixedly connected to the bottom of the sedimentation plate 3, the free end of the blow-down pipe 14 extends to the outer side of the first tank 1, and the second downcomer 15 is used for conveying wastewater on the sedimentation plate 3 into the cavity between the sedimentation plate 3 and the adjusting component 4 through the liquid pumping machine;

The bottom of the hydraulic cylinder 9 is provided with a hydraulic rod 16, the inner side of the second tank body 8 is provided with a first-stage nanofiltration membrane system 17, a second-stage nanofiltration membrane system 19, a heat insulation plate 20 and a heat conduction plate 21 in an erected mode, the first-stage nanofiltration membrane system 17 and the second-stage nanofiltration membrane system 19 are both arranged on the inner side of the second tank body 8in an erected mode, and the heat insulation plate 20 and the heat conduction plate 21 are both fixedly connected to the inner side wall of the second tank body 8; push plates 18 are arranged at the bottoms of the primary nanofiltration membrane system 17 and the secondary nanofiltration membrane system 19 in parallel, each push plate 18 is sleeved on the hydraulic rod 16, a poking plate 22 is slidably arranged at the top of the heat conducting plate 21, one end of the poking plate 22 is rotatably connected with a motor 24, and the motor 24 is mounted on the inner side wall of the second tank body 8 through bolts; an outer guide pipe 23 is spirally arranged in the inner wall of the second tank body 8, one surface of the outer guide pipe 23, which is close to the poking plate 22, penetrates through the inner wall of the second tank body 8 to form a condensation hole, one end, which is far away from the poking plate 22, penetrates through the inner wall of the second tank body 8 and extends to the outer side of the second tank body 8, and a heater is fixedly arranged at the bottom of the inner side of the second tank body 8.

When the method is used, whether oil stains exist or not is judged by detecting the wastewater of the iodine contrast agent hydrolysate, and the pH value of pollutants substituted in the non-production process is detected by a pH detector; removing floating matters, suspended matters, sediments and the like in the wastewater through a sedimentation plate; inputting pretreated wastewater into a cavity between the sedimentation plate and the adjusting component, starting a motor, adding alkali liquor into the cavity between the sedimentation plate and the adjusting component under the metering cooperation transmission of an alkali adding metering pump through an alkali liquor input pipe, uniformly stirring, and measuring the pH value; the wastewater with the pH value adjusted is treated; sequentially pumping into an ultrafiltration membrane system formed by a built-in barrel, evaporating and crystallizing by a heater to obtain a crystal, and concentrating and extracting the iodine contrast agent hydrolysate wastewater by the treatment device;

Wherein, the wastewater filtered by the ultrafiltration membrane system is conveyed to enter a primary nanofiltration membrane system and a secondary nanofiltration membrane system for concentration and separation; wherein, the subsequent treatment process of the concentrated solution is as follows: after the concentrated solution concentrated and separated by the nanofiltration membrane system is sent to an acid adding tank, additional processing treatment is carried out; in the prior art: under the matched use of the stirring pump and the acid adding pump, acid is added, and after uniform stirring, the pH is detected; separating out solid from the solid-liquid mixture of the precipitated crystals, sending out the separated solid to refining treatment, returning the liquid to the equipment, and re-mixing the raw wastewater for use; and (3) delivering the dilute solution treated by the two-stage nanofiltration membrane into an evaporation crystallization system, delivering the crystallized salt to the outside for treatment, and reusing the evaporated condensate water as pure water after the evaporated condensate water is detected to be qualified.

The adjusting component 4 comprises a bottom plate 41 fixedly connected to the inner wall surface of the first tank body 1, the bottom of the bottom plate 41 is fixedly connected with a delivery pipe 42, and the free end of the delivery pipe 42 penetrates through the first tank body 1 and extends to the outer side of the first tank body 1; the middle position of the top of the bottom plate 41 is provided with a mixing component 43, the middle position of the bottom plate 41 is fixedly provided with a motor 44, the top of the motor 44 is provided with a collecting hopper 45 in a threaded manner, the top of the collecting hopper 45 penetrates through the top of the bottom plate 41, and the inner side of the collecting hopper 45 is communicated with the delivery pipe 42 and provided with a drainage port 46; the mixing component 43 comprises a rotating rod 431 rotatably mounted on the motor 44, a top bolt of the rotating rod 431 is mounted on the connector 432, the outer surface of the connector 432 is provided with connecting rods 433 in a circular array, the free end bolt of the connector 432 is provided with a positive stirring blade 434, the outer surface of the rotating rod 431 is fixedly connected with a plurality of reverse stirring blades 435 which are located on the inner side of the collecting hopper 45, and the mounting directions of the reverse stirring blades 435 and the positive stirring blade 434 are opposite.

When the stirring device is used, the motor 44 is started to drive the mixing assembly 43 to rotate at the top of the bottom plate 41, so that the uniform mixing degree of alkali liquor and waste liquor can be quickened, the positive stirring blade 434 and the negative stirring blade 435 are combined to bidirectionally rotate, so that the alkali liquor and the waste liquor are synchronously mixed clockwise and anticlockwise, the mixing efficiency of the alkali liquor and the waste liquor is improved, the reverse stirring blade 435 is utilized to reversely stir the waste water at the inner side of the drainage port 46, foreign matters in the waste liquor can be prevented from being directly gathered and accumulated to block the drainage port 46, and meanwhile, the waste liquor is prevented from being locally different in the alkali liquor contained in the upper layer and the lower layer of the waste liquor under the action of a single stirring mode, and help is provided for further promoting the mixing of the alkali liquor and the waste liquor;

After the clear liquid after precipitation is conveyed to the inner side of the built-in barrel 11 through the first downcomer 13, the efficiency of discharging the precipitated substances from the sedimentation plate 3 through the blow-down pipe 14 can be quickened by adding clear water to the top of the sedimentation plate 3 and combining with the starting of a motor and under the spiral pushing of the reverse stirring blade 435 to the liquid, so that the self-cleaning function of the treatment device is improved.

The ultrafiltration membrane system 6 comprises at least two first ring groups 61 which are stacked and installed, a second ring group 62 is stacked and installed at the bottom of the first ring group 61, ring plate frames 63 which are inserted into the inner sides of the first ring group 61 and the second ring group 62, a pocket plate 64 is fixedly connected to the bottom of the second ring group 62, a plurality of small spheres 65 which are fixedly connected to the outer surface of the second ring group 62, and ultrafiltration membranes 66 are fixedly installed at the tops of the first ring group 61 and the second ring group 62, wherein the ultrafiltration membranes 66 are also installed at the bottom of the first ring group 61, the bottoms of the second ring group 62 are embedded and installed on the movable plate 7 through the small spheres 65, and the overlapped parts of the built-in barrel 11 and the movable plate 7 are connected into the same whole with the movable plate 7, so that the inner cavity tightness of the built-in barrel 11 can be ensured, and meanwhile, the ultrafiltration membranes 66 can be movably split along with the movable plate 7.

When the ultrafiltration membrane system is used, the ultrafiltration membrane system 6 can be taken out from the inner cavity of the built-in barrel 11 by pulling the movable plate 7 outwards, so that the severely blocked or locally broken ultrafiltration membrane 66 can be conveniently cleaned and replaced, the hood plate 64 is used as a structure for collecting filtrate, and under the guidance of the guide pipe 10, the wastewater enters the secondary purification step of the nanofiltration membrane; the bottom of the ultrafiltration membrane 66 can be supported and protected through the ring plate frame 63, and the influence on the filter pressing effect caused by mutual adsorption and lamination of the upper surface and the lower surface of the first ring group 61 provided with the two ultrafiltration membranes 66 can be avoided;

Wherein, by using the small spheres 65 as a contact structure between the first ring set 61 and the second ring set 62, the disc type membrane assembly in the ultrafiltration membrane system which is served by the ultrafiltration membrane system 6 can be well realized, and the real filtering effect and performance of the ultrafiltration membrane 66 can be exerted.

The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution and the modified concept thereof, within the scope of the present invention.

Claims

1. Iodine contrast agent hydrolysate waste water concentration draws processing system, characterized by: the novel water tank comprises a first tank body (1), wherein a sedimentation plate (3) is arranged at a position, close to the top, of the inner side of the first tank body (1), and an adjusting component (4) and a separation plate (5) are fixedly arranged at a position, below the sedimentation plate (3), of the inner side of the first tank body (1); the inner side bottom of the first tank body (1) is fixedly connected with a built-in barrel (11), the top of the built-in barrel (11) is inserted into the bottom of the isolation plate (5), and the inner side bottom of the built-in barrel (11) is provided with an ultrafiltration membrane system (6);

The outer surface of the first tank body (1) is close to the right side and is provided with a second tank body (8), a guide pipe (10) is connected between the second tank body (8) and the first tank body (1) in a flange manner, and a right end bolt of the guide pipe (10) is inserted into the top of the second tank body (8); the top bolt of the second tank body (8) is provided with a hydraulic cylinder (9), the bottom of the hydraulic cylinder (9) is provided with a hydraulic rod (16), the inner side of the second tank body (8) is provided with a first-stage nanofiltration membrane system (17), a second-stage nanofiltration membrane system (19), a heat insulation plate (20) and a heat conduction disc (21), the first-stage nanofiltration membrane system (17) and the second-stage nanofiltration membrane system (19) are arranged on the inner side of the second tank body (8), and the heat insulation plate (20) and the heat conduction disc (21) are fixedly connected to the inner side wall of the second tank body (8);

The bottom of one-level nanofiltration membrane system (17) and second grade nanofiltration membrane system (19) all parallel mount has push away dish (18), every push away dish (18) all the suit on hydraulic stem (16), heat conduction dish (21) top slidable mounting has dials board (22), the one end rotation of dialling board (22) is connected with motor (24), motor (24) bolt mounting is on the inside wall of No. two jar body (8).

2. The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system according to claim 1, wherein: the top of the first tank body (1) is inserted with a pH detector (2) for detecting the pH value in the wastewater; the movable plate (7) is inserted into the bottom of the inner side of the first tank body (1), and edges of the movable plate (7) are sealed with the inner wall of the first tank body (1) by adopting a slidable seal.

3. The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system according to claim 4, wherein: the adjusting component (4) comprises a bottom plate (41) fixedly connected to the inner wall surface of the first tank body (1), a delivery pipe (42) is fixedly connected to the bottom of the bottom plate (41), and the free end of the delivery pipe (42) penetrates through the first tank body (1) and extends to the outer side of the first tank body (1).

4. The iodine contrast agent hydrolysate wastewater concentration extraction treatment system according to claim 3, characterized in that: the mixing assembly (43) is arranged at the middle position of the top of the bottom plate (41), the motor (44) is fixedly arranged at the middle position of the bottom plate (41), the collecting hopper (45) is arranged at the top of the motor (44) in a threaded manner, the top of the collecting hopper (45) penetrates through the top of the bottom plate (41), and a drainage port (46) is formed in the inner side of the collecting hopper (45) and communicated with the delivery pipe (42).

5. The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system according to claim 4, wherein: mixing assembly (43) are including rotatory bull stick (431) of installing on motor (44), connector (432) are installed to the top bolt of bull stick (431), the outward appearance of connector (432) is circular whole being connected with connecting rod (433), just stirring leaf (434) are installed to the free end bolt of connector (432), the outward surface of bull stick (431) just is located and gathers inboard fixedly connected with a plurality of anti-stirring leaf (435) of bucket (45), the installation opposite direction of anti-stirring leaf (435) and just stirring leaf (434).

6. The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system according to claim 1, wherein: the top fixed mounting of division board (5) has be used for to built-in barrel (11) inboard supercharged first booster pump (12), the surface fixedly connected with alkali lye input tube, downcomer one (13), blow off pipe (14) and downcomer two (15) of a jar body (1), alkali lye input tube is used for adding alkali lye to the cavity between subsider (3) and adjusting part (4) and adjusts the pH value of waste water.

7. The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system according to claim 6, wherein: the upper end of the first downcomer (13) is connected into a cavity between the sedimentation plate (3) and the adjusting component (4), the lower end of the first downcomer (13) is connected into an inner cavity of the built-in barrel (11), the top of the blow-down pipe (14) is fixedly connected to the bottom of the sedimentation plate (3), the free end of the blow-down pipe (14) extends to the outer side of the first tank body (1), and the second downcomer (15) is used for conveying wastewater on the sedimentation plate (3) to the cavity between the sedimentation plate (3) and the adjusting component (4) through the liquid pumping machine.

8. The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system according to claim 1, wherein: the ultrafiltration membrane system (6) comprises at least two first ring groups (61) which are stacked and installed, wherein second ring groups (62) are stacked and installed at the bottoms of the first ring groups (61), ring plate frames (63) are inserted into the inner sides of the first ring groups (61) and the second ring groups (62), pocket plates (64) are fixedly connected to the bottoms of the second ring groups (62), a plurality of small spheres (65) are fixedly connected to the outer surfaces of the second ring groups (62), ultrafiltration membranes (66) are positioned and installed at the tops of the first ring groups (61) and the second ring groups (62), and ultrafiltration membranes (66) are positioned and installed at the bottoms of the first ring groups (61); the left end of the guide pipe (10) sequentially penetrates through the first tank body (1) and the pocket plate (64) and extends to the top of the pocket plate (64).

9. The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system according to claim 1, wherein: the inner wall of the second tank body (8) is provided with an outer guide pipe (23) in a spiral mode, one surface of the outer guide pipe (23) close to the poking plate (22) penetrates through the inner wall of the second tank body (8) to form a condensation hollow hole, one end of the poking plate (22) is far away from the inner wall of the second tank body (8) and extends to the outer side of the second tank body (8), and a heater is fixedly installed at the bottom of the inner side of the second tank body (8).

10. The iodine contrast agent hydrolysate wastewater concentration and extraction treatment system according to claim 1, wherein: the aperture of the membrane in the ultrafiltration membrane system is 0.03 um-0.2 um; the ultrafiltration membrane in the ultrafiltration membrane system is a hollow fiber membrane or a flat plate type tubular membrane; the molecular weight cut-off of the primary nanofiltration membrane system is 500 Da-1000 Da; the molecular weight cut-off of the secondary nanofiltration membrane system is 100 Da-500 Da; nanofiltration membranes in the primary nanofiltration membrane system and the secondary nanofiltration membrane system are roll membranes, hollow fiber membranes, tubular membranes or flat membranes; the nanofiltration membrane in the primary nanofiltration membrane system and the secondary nanofiltration membrane system is made of polyamide PA, polyimide PI, cellulose acetate CA, sulfonated polysulfone SPS, sulfonated polyether sulfone SPES, polyvinyl alcohol PVA or inorganic materials.