CN109289527B - Impinging stream vibrating membrane separation assembly and fractal device - Google Patents
Impinging stream vibrating membrane separation assembly and fractal device Download PDFInfo
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- CN109289527B CN109289527B CN201811313934.5A CN201811313934A CN109289527B CN 109289527 B CN109289527 B CN 109289527B CN 201811313934 A CN201811313934 A CN 201811313934A CN 109289527 B CN109289527 B CN 109289527B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/18—Use of gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/40—Automatic control of cleaning processes
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Abstract
The invention discloses an impinging stream vibrating membrane separation assembly and a fractal device. Comprises a separation column and a raw material delivery pump; the separation column is sequentially provided with a reflux area, a separation area, an impact flow area and a sedimentation area from top to bottom; the reflux zone is positioned at the upper end of the separation column, and the top of the reflux zone is provided with a heterogeneous fluid outlet which is connected with an inlet of the raw material delivery pump; the separation area is provided with a vibrating membrane separation component, and two side surfaces are provided with separated product outlets; heterogeneous fluid inlets are arranged on two side surfaces of the impact flow area, are positioned on the same plane and are oppositely arranged, and are connected with an outlet of the raw material conveying pump; the settling zone is positioned at the lower end of the separation column and is partially isolated from the impact flow zone by a partition plate, and the bottom of the settling zone is provided with a condensed phase fluid outlet. The raw material is divided into two flows by a raw material delivery pump and enters a membrane component impact area to form an impact flow. The fluid generates vortex flow through opposite impact to make the solid particles in motion state in the separation process, and simultaneously the vibration generated by the fluid can make the fluid in micro-vibration state in the membrane tube.
Description
Technical Field
The invention belongs to the technical field of heterogeneous separation, and particularly relates to an impinging stream vibrating membrane separation assembly and a fractal device.
Background
Heterogeneous separation is a system comprising solid-liquid separation, solid-gas separation or liquid-gas separation. The three types of separation processes are very important unit operations and are widely applied to various departments of national economy, such as chemical industry, light industry, pharmacy, mines, metallurgy, energy, environmental protection and the like. In many production processes, the separation technology level is high and low, and the quality directly influences the possibility of realizing industrial scale production in many processes, the advancement and reliability of the process, the product quality and energy consumption, the economic and social benefits of environmental protection and the like.
For example, smoke generated in the combustion process and various dusts generated in industrial production and processing procedures are the most serious and long-lasting pollutants in the atmosphere. Dust entering the atmosphere along with the discharged gas is a main factor causing haze phenomenon, and directly threatens the life of people, and particularly, the environment polluted by dust can cause various cardiovascular and respiratory diseases and the like. Traditional solid-gas separation is equipped and is adopted electrostatic precipitator or sack cleaner more, if reform transform on prior art and realize minimum emission, because of investment, operation, maintenance cost are too high, lead to implementing occasionally certain resistance.
Heterogeneous solid-liquid separation can be divided into two processes of sedimentation and filtration. In practical application, in order to improve the effect of solid-liquid separation, a reasonable solid-liquid separation process needs to be determined from multiple aspects, and the following measures are mainly adopted: firstly, a combined flow is adopted, namely two or more solid-liquid separation means are reasonably matched, and configuration is optimized, such as combination of sedimentation and filtration, combination of a cyclone and filtration and sedimentation separation, and the like, and the method is widely applied to mineral processing; secondly, the sedimentation speed and the filtration speed are improved by means of coagulation, flocculation and the like and auxiliary agents; thirdly, the filtering performance is improved by utilizing a precoating layer, a filter aid and the like, and the filtering speed is increased; and fourthly, the filtration and separation are promoted by using auxiliary means such as an electric field, a magnetic field and the like.
Impinging Streams (IS) IS a new chemical technology. Since Elperin proposed the concept of impinging stream in 1961, much research and development has been conducted; the liquid phase reaction or the multiphase reaction taking liquid as continuous phase is a large class of reaction systems widely involved in various process industries such as chemical industry, petrochemical industry, medicine, light industry, hydrometallurgy and the like. Such reactions are of course carried out on a molecular scale, and the micromixing conditions in the apparatus have a significant impact on the efficiency of the process. The basic principle of the novel technical method of the impinging stream is as follows: two equal-quantity two-phase flows flow coaxially in opposite directions and collide at the middle point to generate oscillation. The result is a highly turbulent impact zone between the two acceleration tubes, greatly enhancing the transfer process.
Fractal structures are structures that are ubiquitous in nature and have morphological characteristics that fill space in the form of non-integer dimensions. Generally defined as "a rough or fragmented geometric shape, which may be divided into several parts, and each part is (at least approximately) an overall reduced shape", i.e. has self-similar properties. The principle of self-similarity and the principle of iterative generation are important principles of fractal theory. The self-similarity in fractal features may be identical or statistically similar. Standard self-similar fractal is a mathematical abstraction that iteratively generates infinitely fine structures such as Koch snowflake, Sierpinski carpet (Sierpinski carpet), etc. The regular fractal is only a few, and most fractal is random fractal in statistical significance, such as typical self-similarity between a macroscopic celestial body structure and a microscopic molecular atomic structure, distribution of the whole shape of a big tree and branches, human blood vessels and the like.
Disclosure of Invention
The invention aims to provide a high-efficiency heterogeneous separation device, which enables condensed particles to be far away from membrane pores, relieves the blockage of the condensed particles in the membrane pores, and can clean the device through automatic backwashing without stopping.
In order to achieve the purpose, the technical scheme is as follows:
an impinging stream vibrating membrane separation assembly comprises a separation column and a raw material delivery pump;
the separation column is sequentially provided with a reflux area, a separation area, an impact flow area and a sedimentation area from top to bottom;
the reflux zone is positioned at the upper end of the separation column, the top of the reflux zone is provided with a heterogeneous fluid outlet, the outlet is connected with the inlet of the raw material delivery pump, and the reflux zone is provided with a control valve;
the separation area is provided with a vibrating membrane separation component, two side faces of the separation area are provided with separated product outlets, and the two outlets are collected and then are discharged through valve control; meanwhile, a compressed gas inlet and a medicament backwashing inlet are arranged at the collecting outlet in a parallel connection mode, and a control valve is arranged;
the two sides of the impact flow area are provided with heterogeneous fluid inlets, the two inlets are positioned on the same plane and are oppositely arranged, and the two inlets are both connected with the outlet of the raw material conveying pump and are provided with control valves;
the settling zone is positioned at the lower end of the separation column and is partially isolated from the impact flow zone by a partition plate, a condensed phase fluid outlet and a medicament outlet are arranged at the bottom of the settling zone, and the two outlets are distributed in parallel and are provided with control valves;
the vibrating membrane separation assembly consists of a resin sealing layer and a plurality of membrane tubes; the resin sealing layers are respectively positioned on the cross sections of the reflux area and the separation area and the cross sections of the separation area and the impact flow area; the openings at the two ends of the membrane tube penetrate through the resin sealing layer and the space for communicating the reflux area with the impact flow area, and the membrane tube is fixedly bonded with the resin sealing layer.
According to the scheme, the membrane tube is a hollow fiber membrane, an organic tubular membrane, an inorganic tubular membrane, a metal powder sintered tube and an active carbon sintered tube.
According to the scheme, the pore diameter of the micropores of the tube wall of the membrane tube is between 0.01um and 50um, the inner diameter of the membrane tube is between 0.3mm and 50mm, and the outer diameter of the membrane tube is between 0.5mm and 200 mm.
According to the scheme, the heterogeneous fluid comprises a continuous phase and a condensed phase; wherein the continuous phase is gas, and the condensed phase is solid particles or liquid particles; or the continuous phase is liquid and the condensed phase is solid particles.
An impinging stream vibrating membrane separation device is characterized in that two impinging stream vibrating membrane separation assemblies are connected in parallel to form an impinging stream vibrating membrane separation fractal unit; and then a plurality of impinging stream vibrating membrane separation fractal units are assembled into the impinging stream vibrating membrane separation device according to the fractal principle.
The invention relates to an impinging stream vibrating membrane separation assembly which is a novel membrane separation structural assembly designed based on the basic principle of membrane separation. The raw material is divided into two flows by a raw material delivery pump and enters a membrane component impact area to form an impact flow. The fluid generates vortex flow through opposite impact to make the solid particles in motion state in the separation process, and simultaneously the vibration generated by the fluid can make the fluid in micro-vibration state in the membrane tube. During the separation process, the condensed particles are far away from the membrane pores, and the blockage of the particles in the membrane pores is relieved. Because the device designs the particle passageway of the condensed state, in the separation process, the particle gathers and subsides to the subassembly lower extreme, gets rid of from the condensed phase export. The impinging stream vibrating membrane separation module has the following advantages compared to conventional separation membrane modules.
Compared with the traditional separation membrane component, the impinging stream vibration membrane separation component and the fractal device have the following advantages.
The condensed particles are far away from the membrane pores by using an impinging stream technology, so that the blockage of the condensed particles in the membrane pores is relieved.
The impinging stream vibrating membrane separation fractal device can judge the blocking condition of the membrane holes through the flow of a separation product outlet or the pressure difference between a raw material inlet and a product outlet, the blocking condition of the membrane holes is more serious when the flow of the separation product outlet is smaller or the pressure difference between the raw material inlet and the product outlet is larger, and the non-stop backflushing of four modes can be realized by controlling the state of a valve through an automatic control system.
The design concept of one inlet and two outlets is adopted, so that solid and liquid flow out from different channels, and accumulation of condensed particles is avoided.
The design concept is suitable for various separation membranes such as hollow fiber membranes, ceramic membranes, organic tubular membranes and the like.
The fractal arrangement of the impinging stream fractal vibration membrane component is realized by imitating the principle of microscopic and macroscopic self-similarity in the natural fractal theory, so that the large-scale equipment can be realized, and the fluid can be uniformly distributed.
Drawings
FIG. 1: the invention has a structural schematic diagram of an impinging stream vibrating membrane separation component;
FIG. 2: 2 impact flow vibration membrane separation assemblies;
FIG. 3: a fractal unit structure schematic diagram consisting of 8 impinging stream vibration membrane separation components;
FIG. 4: the invention discloses a structural schematic diagram of an impinging stream vibrating membrane separation fractal device.
Wherein, 1-a reflux zone; 2-a separation zone; 3-impact flow zone; 4-a settling zone; 5-a membrane tube; 6-a baffle plate; 7-a sealing layer of resin; p1-feedstock delivery pump; c11-feedstock inlet control valve; c12-reflux control valve; c13-compressed gas inlet control valve; c14 — isolated product outlet control valve; c15-condensed phase outlet control valve; c16-agent backwash inlet control valve; c17-agent backwash outlet control valve.
Detailed Description
The following examples further illustrate the technical solutions of the present invention, but should not be construed as limiting the scope of the present invention.
An impinging stream vibrating membrane separation module as shown in fig. 1, comprising a separation column and a feed transfer pump P1;
the separation column is sequentially provided with a reflux area 1, a separation area 2, an impinging stream area 3 and a settling area 4 from top to bottom;
the reflux zone 1 is positioned at the upper end of the separation column, the top of the reflux zone is provided with a heterogeneous fluid outlet, the outlet is connected with the inlet of a raw material delivery pump P1, and a control valve (C12-reflux control valve) is arranged;
the separation area 2 is provided with a vibrating membrane separation component, two side faces of the separation area are provided with separated product outlets, and the two outlets are collected and then are controlled to be discharged through a valve (C14-separated product outlet control valve); meanwhile, a compressed gas inlet and a medicament backwashing inlet are arranged at the collecting outlet in a parallel connection mode, and control valves (C13-compressed gas inlet control valve, C16-medicament backwashing inlet control valve) are arranged;
two sides of the impact flow zone 3 are provided with heterogeneous fluid inlets, the two inlets are positioned on the same plane and are oppositely arranged, and both the two inlets are connected with an outlet of the raw material conveying pump and are provided with control valves (C11-raw material inlet control valves);
the settling zone 4 is positioned at the lower end of the separation column and is partially isolated from the impact flow zone 3 by a partition plate 6, the bottom of the settling zone is provided with a condensed phase fluid outlet and a medicament outlet, and the two outlets are distributed in parallel and are provided with control valves (C15-a condensed phase outlet control valve and C17-a medicament backwashing outlet control valve);
the vibrating membrane separation assembly consists of a resin sealing layer 7 and a plurality of membrane tubes 5; the resin sealing layers 7 are respectively positioned on the cross sections of the reflux area and the separation area and the cross sections of the separation area and the impact flow area; the openings at the two ends of the membrane tube 5 penetrate through the resin sealing layer and the space for communicating the reflux area with the impact flow area, and the membrane tube is fixedly bonded with the resin sealing layer.
The membrane tube is a hollow fiber membrane, an organic tubular membrane, an inorganic tubular membrane, a metal powder sintered tube or an activated carbon sintered tube.
The pore diameter of the micropores of the tube wall of the membrane tube is between 0.01um and 20um, the inner diameter of the membrane tube is between 0.3mm and 10mm, and the outer diameter of the membrane tube is between 0.5mm and 200 mm.
The heterogeneous fluid comprises a continuous phase and a condensed phase; wherein the continuous phase is gas, and the condensed phase is solid particles or liquid particles; or the continuous phase is liquid and the condensed phase is solid particles.
The impinging stream vibrating membrane separation device comprises an impinging stream vibrating membrane separation fractal unit (shown in figure 2) which is formed by connecting two impinging stream vibrating membrane separation assemblies in parallel; and then a plurality of impinging stream vibrating membrane separation fractal units are assembled into an impinging stream vibrating membrane separation device according to the fractal principle (as shown in fig. 3 and 4). In fig. 4, white circles represent components and white lines represent pipes.
In the normal operation state of the invention, the valves C11, C12 and C14 are in the normally open state, C13, C15, C16 and C17 are in the closed state (see figure 1), and the valve state is controlled by the automatic control system to realize the non-stop recoil of four modes, and the operation is as follows:
instantaneous pulse recoil: when a certain assembly is blocked, namely the flow of a product outlet is reduced or the pressure difference between the inlet pressure and the product outlet is increased, a separated product outlet valve C14, a raw material reflux valve C12 and a raw material inlet valve C11 of the assembly can be closed in sequence, and at the moment, the instantaneous pressure of a separation area shell (a separated product area) is increased to generate a water hammer phenomenon. At the moment, the raw material reflux valve C12 can be opened to reduce the pressure in the membrane tube, and products outside the tube flow into the tube to realize back flushing; and the bottom deslagging valve C15 can be opened to realize back flushing and achieve the purpose of deslagging.
Normal continuous backflushing: when a block of a module is present, the feed inlet valve C11 for that module can be closed, and the separation zone tube shell fluid flows into the tube, allowing for continuous back flushing of the module (see fig. 2).
Compressed gas backflushing: when a certain assembly is blocked, a raw material inlet valve C11 and a separated product outlet control valve C14 of the assembly are closed, a compressed gas control valve C13 is opened, and the separated product flows from the outside of the pipe to the inside of the pipe along with the gas, so that gas backflushing on the assembly is realized.
When a certain component is blocked, the control valve C14 of the separated product outlet of the component is closed, the control valve C13 of compressed gas is opened, at the moment, the gas flows from the outside to the inside of the pipe, the separated raw material is sheared with the gas along the membrane pipe, and gas-liquid synergistic back flushing cleaning of the component is realized.
Back flushing of the medicament: when a severe blockage occurs in a certain assembly, valves C14, C11 and C12 of the assembly can be closed, and an agent backwashing inlet control valve C16 and an agent backwashing outlet control valve C17 are opened, so that the agent flows from the outside of the membrane pipe to the inside of the membrane pipe along with the fluid of the separated product area and returns to the agent tank through an agent outlet C17, and continuous agent backwashing is realized. After the flushing is finished, the C16 is closed, the C14 is opened, and the residual medicament in the cavity returns to the medicament groove.
Claims (5)
1. An impinging stream vibrating membrane separation assembly is characterized by comprising a separation column and a raw material conveying pump;
the separation column is sequentially provided with a reflux area, a separation area, an impact flow area and a sedimentation area from top to bottom;
the reflux zone is positioned at the upper end of the separation column, the top of the reflux zone is provided with a heterogeneous fluid outlet, the outlet is connected with the inlet of the raw material delivery pump, and the reflux zone is provided with a control valve;
the separation area is provided with a vibrating membrane separation component, two side faces of the separation area are provided with separated product outlets, and the two outlets are collected and then are discharged through valve control; meanwhile, a compressed gas inlet and a medicament backwashing inlet are arranged at the collecting outlet in a parallel connection mode, and a control valve is arranged;
the two sides of the impact flow area are provided with heterogeneous fluid inlets, the two inlets are positioned on the same plane and are oppositely arranged, and the two inlets are both connected with the outlet of the raw material conveying pump and are provided with control valves;
the settling zone is positioned at the lower end of the separation column and is partially isolated from the impact flow zone by a partition plate, a condensed phase fluid outlet and a medicament outlet are arranged at the bottom of the settling zone, and the two outlets are distributed in parallel and are provided with control valves;
the vibrating membrane separation assembly consists of a resin sealing layer and a plurality of membrane tubes; the resin sealing layers are respectively positioned on the cross sections of the reflux area and the separation area and the cross sections of the separation area and the impact flow area; the openings at the two ends of the membrane tube penetrate through the resin sealing layer and the space for communicating the reflux area with the impact flow area, and the membrane tube is fixedly bonded with the resin sealing layer.
2. The impinging stream vibrating membrane separation module of claim 1 wherein said membrane tubes are hollow fiber membranes, metal powder sintered tubes, activated carbon sintered tubes.
3. The impinging stream vibrating membrane separation assembly of claim 1 wherein the pore size of the micropores in the wall of the membrane tube is between 0.01 μm and 50 μm, the inner diameter of the membrane tube is between 0.3mm and 50mm, and the outer diameter of the membrane tube is between 0.5mm and 200 mm.
4. The impinging stream diaphragm separation assembly of claim 1 wherein said heterogeneous fluid comprises a continuous phase and a condensed phase; wherein, the continuous phase is gas, and the condensed phase is solid particles or liquid; or the continuous phase is liquid and the condensed phase is solid particles.
5. An impinging stream vibrating membrane separation device is characterized in that two impinging stream vibrating membrane separation assemblies as claimed in claim 1 are connected in parallel to form an impinging stream vibrating membrane separation fractal unit; and then a plurality of impinging stream vibrating membrane separation fractal units are assembled into the impinging stream vibrating membrane separation device according to the fractal principle.
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| CN201811313934.5A CN109289527B (en) | 2018-11-06 | 2018-11-06 | Impinging stream vibrating membrane separation assembly and fractal device |
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| CN201811313934.5A CN109289527B (en) | 2018-11-06 | 2018-11-06 | Impinging stream vibrating membrane separation assembly and fractal device |
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| CN109289527A CN109289527A (en) | 2019-02-01 |
| CN109289527B true CN109289527B (en) | 2021-07-13 |
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| US5445781A (en) * | 1991-08-28 | 1995-08-29 | Centro Sviluppo Settori Impiego S.R.L. | Process for the injection molding of non-precatalyzed polymerizable resins at high-pressure and flow |
| US8075740B2 (en) * | 2007-07-20 | 2011-12-13 | Aht Solutions, Llc | Method and system for treating feedwater |
| CN204502586U (en) * | 2015-03-26 | 2015-07-29 | 中国电力工程顾问集团中南电力设计院有限公司 | Horizontal percussion flow moisture trap |
| CN205856393U (en) * | 2016-06-21 | 2017-01-04 | 中国石油化工股份有限公司 | A kind of impinging stream reaction device |
| CN206985779U (en) * | 2017-07-28 | 2018-02-09 | 九江学院 | A kind of percussion flow photocatalysis membrana separator |
| CN108722026A (en) * | 2018-08-13 | 2018-11-02 | 武汉工程大学 | A kind of heterogeneous separation device with sieve-board type fractal structure |
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