CN105561793A - Filtering and purifying device for heterogeneous materials and method for filtering and purifying heterogeneous materials - Google Patents
Filtering and purifying device for heterogeneous materials and method for filtering and purifying heterogeneous materials Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
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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
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/04—Tubular membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/10—Specific supply elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/12—Specific discharge elements
- B01D2313/125—Discharge manifolds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D2313/18—Specific valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/24—Specific pressurizing or depressurizing means
- B01D2313/243—Pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/12—Feed-and-bleed systems
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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
- B01D2321/02—Forward flushing
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Abstract
The invention relates to a filtering and purifying device for heterogeneous materials and a method for filtering and purifying the heterogeneous materials. The filtering and purifying device comprises a raw liquid delivering pipeline, an inorganic membrane assembly, a penetrating liquid pipeline, a concentrated-liquid externally-discharging pipeline, a concentrated-liquid circulating pipeline and a cleaning pipeline. The raw liquid delivering pipeline is composed of a raw material input pipe, a raw material pump, a raw material output pipe and a raw material control valve; the penetrating liquid pipeline is composed of a penetrating liquid output pipe and a penetrating liquid control valve; the concentrated-liquid externally-discharging pipeline is composed of a concentrated-liquid externally-discharging pipe and a concentrated-liquid externally-discharging control valve; the concentrated-liquid circulating pipeline is arranged between the concentrated-liquid externally-discharging pipe and the raw material output pipe, and is composed of a concentrated-liquid circulating input pipe, a circulating pump, a concentrated-liquid circulating output pipe and a concentrated-liquid circulating control valve; the cleaning pipeline is composed of a cleaning input pipe, a washing box, a cleaning box, a cleaning pump, a cleaning output pipe and a cleaning control valve. By means of the device and the method for filtering and purifying the heterogeneous materials, fluctuation and unplanned shutdown of a production device are reduced, the quality of products is improved, the yield of oil products is increased, and it is guaranteed that discharging is environmentally friendly and meets the standard.
Description
Technical field
The invention belongs to technical field of membrane separation, be specifically related to a kind of filtering and purifying of heterogeneous material and the method for the heterogeneous material of filtration, purification thereof.
Background technology
UF membrane occurs in 20 beginnings of the century, the separation technology emerged rapidly after the sixties in 20th century.Membrane separation technique is owing to having separation, concentrated, purifying and refining function concurrently, there are again efficient, energy-saving and environmental protection, molecule level is filtered and filter process is simple, be easy to the features such as control, therefore, food, medicine, biology, environmental protection, chemical industry, metallurgy, the energy, oil, water treatment, electronics, the field such as bionical are widely used at present, create huge economic benefit and social benefit, become one of most important means in current separation science.
Current world crude oil is towards heaviness, in poor quality, high sulfur-bearing future development, and unconventional heavy crude is as very large in the proved reserves of viscous crude, oil-sand, pitch etc., therefore lighting technique such as delayed coking, catalytic cracking, the hydrocracking etc. of heavy oil residue are subject to the attention of oil refining industry always.And the increase of crude oil with poor quality ratio directly causes oil refining apparatus difficulty of processing to increase, make liquid phase process medium composition complicated, what have even forms the heterogeneous systems such as stable liquid-solid, liquid-liquid, be difficult to realize being separated on existing breakdown of emulsion, filtration facility, this safety and steady having a strong impact on this device and downstream unit runs.In addition, along with going from bad to worse of Domestic Environment, the environmental protection pressure that petroleum chemical industry faces is also increasing; This kind of unsegregated liquid-solid, liquid-liquid heterogeneous system enters environment-friendly processing unit, discharge will be caused not up to standard, directly can cause the pollution of environment.
For the delayed coking unit in domestic oil refining industry, in the oil product medium that it is produced, the sewage of discharge and amine liquid for desulphurization, all in various degree containing more coke powder and other impurity, be the processing difficulties of oil refining industry always; The ratio of crude oil with poor quality increases at present in addition, makes the processing medium complicated component of delayed coking unit, directly causes it to form more stable liquid-solid, liquid-liquid heterogeneous system, and traditional filtration and breakdown of emulsion facility were lost efficacy.If the oil product media such as coker gasoline, coker gas oil, wax tailings are because of containing coke powder and water, directly will cause the catalyst failure of rear portion hydrogenation plant, too early shut-down regeneration, have lost benefit; As sewage quality constantly worsens, make the emulsification of sewage serious, a large amount of oil-containing and coke powder, not only have lost oil product but also had a strong impact on the stable operation of environment protection sewage treating apparatus; As in amine liquid after desulfurization because carrying coke powder and oil, cause amine liquid foaming tendency to increase, both affected the desulfurized effect of oil product, and caused again the loss of amine liquid, and affected the safe and stable operation of amine liquid regenerating unit.
Same, for other main process units of oil refining industry, along with the raising of crude oil with poor quality processing ratio, its oil product produced all in various degree containing more impurity, if catalytic cracked oil pulp is because of higher containing solid catalyst particle, it is the difficult point of Refining Chemical Industry processing always; The sewage of device then carries a large amount of oil product because emulsification is serious, causes oil product to lose serious.
For the technology of oil product or amine liquid imurity-removal, current most domestic adopts fixed metallic filter and backwash filter, but this type of filter all to there is filtering accuracy not high, filter efficiency is difficult to the problem ensured; Backwash filter also there is oil product or amine liquid loses larger problem; If raising filtering accuracy, one is the processing and manufacturing technology that can promote do not had, and two is the flux being difficult to ensure to filter, uneconomical economically.In addition, this type of filtration facility can not realize the separation of the moisture or amine liquid oil-containing of oil product.
For the de-solid degreasing technique of sewage, to be still separated based on gravitational settling, separator at present, cyclonic separation and chemical method four class technology, gravitational settling is separated to the process of emulsion substantially to no effect with separator; Cyclonic separation then de-solid oil removal efficiency is limited; Chemical agent rule get dirty discharge, contact effect and standing separation time etc. impact, and increase cost, effect is also undesirable.In actual production process, above-mentioned four kinds of technology also combine by some enterprises, but all do not tackle the problem at its root.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and the filtering and purifying that a kind of heterogeneous material is provided; this device is used for fluctuation and the unplanned shutdown of the method minimizing process units of the heterogeneous material of filtration, purification; improve the quality of products and oil product yield, and guarantee that environment protection standard is discharged.
In order to achieve the above object, the present invention adopts following technical scheme:
The invention provides a kind of filtering and purifying of heterogeneous material, it comprises material liquid feed-line, inorganic membrane assembly, permeate line, the outer comb line of concentrate, concentrate pipeloop and cleaning pipeline, described material liquid feed-line is by raw material input channel, feedstock pump, raw material output channel and feed control valve composition, raw material input channel is connected with the input of feedstock pump, one end of raw material output channel is connected with raw material delivery side of pump, raw material output channel is provided with feed control valve, the other end of raw material output channel communicates with the tube-side inlet pipeline of inorganic membrane assembly, described permeate line is made up of penetrating fluid output channel and penetrating fluid control valve, and the arrival end of penetrating fluid output channel communicates with the penetrating fluid outlet side of the shell side of inorganic membrane assembly, and penetrating fluid output channel is provided with penetrating fluid control valve, the outer comb line of described concentrate is arranged control valve outward by the outer discharge pipe of concentrate and concentrate and is formed, and the outer arrival end of discharge pipe of concentrate communicates with the tube side concentrate outlet side of inorganic membrane assembly, and the outer discharge pipe of concentrate is provided with concentrate and arranges control valve outward, concentrate pipeloop is provided with between discharge pipe and raw material output channel outside described concentrate, concentrate pipeloop is made up of circulate input channel, circulating pump, concentrate circulation output channel and concentrate circulation control valve of concentrate, concentrate circulation input channel is connected with the input of circulating pump, one end of concentrate circulation output channel is connected with circulation delivery side of pump, concentrate circulation output channel is provided with concentrate circulation control valve, and the other end of concentrate circulation output channel communicates with raw material output channel, described cleaning pipeline is by cleaning input channel, flushing cisterns, cleaning case, scavenging pump, cleaning output channel and purge control valve, the discharge line of flushing cisterns and the discharge line of cleaning case all communicate with cleaning input channel, the input of scavenging pump is connected with cleaning input channel, cleaning delivery side of pump communicates with cleaning output channel, cleaning output channel is provided with purge control valve, and the cleaning other end of output channel communicates with the tube-side inlet pipeline of inorganic membrane assembly.
According to the filtering and purifying of above-mentioned heterogeneous material, described inorganic membrane assembly is made up of inorganic film tube, and the inorganic membrane filtration layer of inorganic film tube is asymmetric compound structure, membrane aperture scope 4nm ~ 1 μm.
According to the filtering and purifying of above-mentioned heterogeneous material, in described inorganic membrane assembly, tube side, the shell side differential pressure design scope of application are 0.1 ~ 0.6MPa; In inorganic membrane assembly, the flow-rate ratio design scope of application of total feed and the outer discharge capacity of concentrate is (10 ~ 200): 1.
According to the filtering and purifying of above-mentioned heterogeneous material, described feedstock pump, circulating pump and cleaning delivery side of pump are equipped with monitoring device, and monitoring device is used for the monitoring of parameter outlet temperature, pressure and flow; Described flushing cisterns and cleaning case are equipped with liquid level monitoring table; Inorganic membrane assembly is provided with differential pressure monitor.
According to the filtering and purifying of above-mentioned heterogeneous material, the quantity of described inorganic membrane assembly be traditionally arranged to be two open one standby or open one standby more.
The filtering and purifying of above-mentioned heterogeneous material is used for the method for the heterogeneous material of filtration, purification, comprises the following steps:
(1) inorganic membrane filtration separation is carried out to the heterogeneous system medium that petrochemical plant produces, heterogeneous system medium to be filtered enters inorganic membrane assembly after feedstock pump boosts, raw material enters the tube side of inorganic membrane assembly, and filter through filmed passing tube, the shell side of the film pipe from inorganic membrane assembly of penetrating fluid after filtering flows out and collects, discharged by inorganic membrane assembly penetrating fluid discharge port, enter downstream unit and carry out processing process; The concentrate do not filtered by inorganic film tube is flowed out from the tube side of inorganic membrane assembly and collects, concentrate outlet side through inorganic membrane assembly is discharged, and after circulating pump boosting, enter the tube-side inlet pipeline of inorganic membrane assembly, again enter inorganic membrane assembly and carry out isolated by filtration together with raw material, so realize the circulating filtration of concentrate; In circulating filtration process, along with the continuous discharge of penetrating fluid, the concentration of concentrate can rise gradually, pressure reduction between the tube side of inorganic membrane assembly and shell side can raise gradually, when differential pressure reaches setting value, arrange concentrate outside needing, outer row's concentrate is according to different in kind, and selected different technique processes;
(2) when inorganic membrane assembly is after long-term operation, when the tube side of inorganic membrane assembly film pipe and the differential pressure of shell side exceed setting value, need to carry out on-line cleaning to inorganic membrane assembly, in advance penetrating fluid (or demineralized water) is stored in flushing cisterns, cleaning agent configures and is placed in cleaning case; During on-line cleaning, first the terminal valve of membrane module for subsequent use is opened, make membrane module for subsequent use be incorporated to inoranic membrane circulating filtration unit; Again by the import and export valve closing of inorganic membrane assembly to be cleaned, inorganic membrane assembly to be cleaned is isolated from system, and gets through on-line cleaning technological process; First draw the penetrating fluid (or demineralized water) in flushing cisterns, after scavenging pump boosting, enter in inorganic membrane assembly to be cleaned, along flow direction, film pipe tube side surface in inorganic membrane assembly is rinsed, washing time 10 ~ 300 seconds, flushing liquor enters the concentrate pipeline of system cloud gray model with concentrate discharge port; Draw the cleaning agent in cleaning case again, after scavenging pump boosting, enter inorganic membrane assembly to be cleaned, along flow direction, film tube-surface is cleaned, after cleaning fluid turns back to cleaning case, extracted out by scavenging pump again and deliver to inorganic membrane assembly, complete the process of wash cycles, whole scavenging period 30 ~ 180 minutes; After cleaning terminates, cleaning fluid loops back cleaning case, and remaining cleaning fluid is rinsed, again introduce flushing cisterns penetrating fluid (or demineralized water), after scavenging pump boosting, enter inorganic membrane assembly, washing time 10 ~ 300 seconds, flushing liquor enters the concentrate pipeline of system cloud gray model, and the inorganic membrane assembly after on-line cleaning, is in stand-by state.
Be used for the method for the heterogeneous material of filtration, purification according to the filtering and purifying of above-mentioned heterogeneous material, the outer row's concentrate described in step (1) selectes different processing technologys according to the difference of medium; When system disposes of sewage oil containing medium, outer row's concentrate returns separator or slop tank, increases the sedimentation separation time of sewage with oil medium; When system process amine liquid or oil product contain solid medium, outer row's concentrate returns disused aine liquid or slop tank, increases the sedimentation separation time of amine liquid or oil product, and amine liquid or Oil Recovery utilize, thus are removed by solid impurity; When system process catalytic slurry, slop tank delivered to by outer row's concentrate, and the sump oil after concentrate sedimentation can be recycled.
The method of the heterogeneous material of filtration, purification is used for according to the filtering and purifying of above-mentioned heterogeneous material, the outer discharge capacity of described concentrate when normal production regulates according to the flow-rate ratio of film pipe shell path difference pressure or assembly total feed and the outer discharge capacity of concentrate, tube side and the shell side differential pressure scope of application are 0.15 ~ 0.38MPa, and the flow-rate ratio scope of application is (10 ~ 200): 1.
Be used for the method for the heterogeneous material of filtration, purification according to the filtering and purifying of above-mentioned heterogeneous material, in step (2), inorganic membrane assembly carries out the tube side of the film pipe of on-line cleaning and shell side differential pressure is 0.05 ~ 0.15MPa.
The method of the heterogeneous material of filtration, purification is used for according to the filtering and purifying of above-mentioned heterogeneous material, the filter type of described inorganic membrane assembly adopts cross-flow filtration, raw material enters from inorganic membrane assembly tube side, after inorganic film tube filters, penetrating fluid is discharged from inorganic membrane assembly shell side, and concentrate carries out circulating filtration after being discharged by tube side.
Described cleaning agent is efficient proprietary chemical, can effectively removal heavy metal, ash content and microparticle if carbon black, particulate etc. are to the blocking of fenestra, inorganic membrane assembly after Chemical cleaning, can recover higher flux, guarantees the long-term operation of membrane module.
Described monitoring device is meet the temperature of explosive-proof grade, pressure, flow, differential pressure and liquid level etc., and control valve is to realize the pneumatic of different switch over travel or motor-driven valve; All instrument, electrically carry out integrated, realize on-line monitoring and adjustment; All instrument and the equal flexible movements of valve reliably, guarantee the realization of whole technical process.
In order to protect the film pipe in inorganic membrane assembly, whole device is also provided with the interlocking that stops in emergency and film pipe tube side and shell side differential pressure is started when 0.6MPa; Described electrically, the automatic control of instrument and valve is all integrated in autocontrol panel cabinet, technology controlling and process accurately, convenient.
Compared with prior art, the beneficial effect that obtains of the present invention:
1. inoranic membrane adopts asymmetric compound structure technology, controllable bore diameter scope from 1 μm to 4nm not etc., inoranic membrane is had, and filtering accuracy is high, flux is large and have good regenerability, and can prevent or decreasing pollution object depth layer infiltrate in loose structure make film forming pipe gather pollution
2. effective surface film layer deposition and pore size control technology, ensure fenestra even aperture distribution, filtering accuracy is high, should not block.
3. efficient chemical cleaning agent, can the effective sedimentary deposit that formed of removal heavy metal, ash content and microparticle (carbon black, particulate etc.), inoranic membrane performance is regenerated, effectively extends life cycle.
4. the main material of inoranic membrane is pottery, can adapt to the complex environments such as high temperature, high pressure, acid, alkali.
5. circulating filtration pattern, produces waste liquid amount little.
6. system automation degree is high, safe and reliable, convenient, flexible.
7. remarkable benefit; Both can improve product quality and the product yield of petrochemical enterprise, and reduce fluctuation and the unplanned shutdown of process units, the qualified discharge of environment-friendly processing unit can be guaranteed again, be of value to environmental protection.
8. wide adaptability; Both be applicable to all kinds of process units and the environment-friendly processing unit of petrochemical enterprise, be also applicable to other industry as the occasion such as electric power, metallurgy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
With reference to shown in Fig. 1, a kind of filtering and purifying of heterogeneous material, it comprises material liquid feed-line 1, inorganic membrane assembly 2, permeate line 3, the outer comb line 4 of concentrate, concentrate pipeloop 5 and cleaning pipeline 6, described material liquid feed-line 1 is by raw material input channel 11, feedstock pump 12, raw material output channel 13 and feed control valve 14 form, raw material input channel 11 is connected with the input of feedstock pump 12, one end of raw material output channel 13 is connected with the output of feedstock pump 12, raw material output channel 13 is provided with feed control valve 14, the other end of raw material output channel 13 communicates with the tube-side inlet pipeline of inorganic membrane assembly 2, described permeate line 3 is made up of penetrating fluid output channel 31 and penetrating fluid control valve 32, and the arrival end of penetrating fluid output channel 31 communicates with the penetrating fluid outlet side of the shell side of inorganic membrane assembly 2, and penetrating fluid output channel 31 is provided with penetrating fluid control valve 32, the outer comb line 4 of described concentrate is arranged control valve 42 outward by the outer discharge pipe 41 of concentrate and concentrate and is formed, the outer arrival end of discharge pipe 41 of concentrate communicates with the tube side concentrate outlet side of inorganic membrane assembly 2, and the outer discharge pipe 41 of concentrate is provided with concentrate and arranges control valve 42 outward, concentrate pipeloop 5 is provided with between discharge pipe 41 and raw material output channel 13 outside described concentrate, concentrate pipeloop 5 is made up of concentrate circulation input channel 51, circulating pump 52, concentrate circulation output channel 53 and concentrate circulation control valve 54, concentrate circulation input channel 51 is connected with the input of circulating pump 52, one end of concentrate circulation output channel 53 is connected with the output of circulating pump 52, concentrate circulation output channel 53 is provided with concentrate circulation control valve 54, and the other end of concentrate circulation output channel 53 communicates with raw material output channel 13, described cleaning pipeline 6 is by cleaning input channel 61, flushing cisterns 62, cleaning case 63, scavenging pump 64, cleaning output channel 65 and purge control valve 66, the discharge line of flushing cisterns 62 and the discharge line of cleaning case 63 all communicate with cleaning input channel 61, the input of scavenging pump 64 is connected with cleaning input pipe 61 road, the output of scavenging pump 64 communicates with cleaning output channel 65, cleaning output channel 65 is provided with purge control valve 66, and the cleaning other end of output channel 65 communicates with the tube-side inlet pipeline of inorganic membrane assembly 2, described inorganic membrane assembly 2 is made up of inorganic film tube, and the inorganic membrane filtration layer of inorganic film tube is asymmetric compound structure, membrane aperture scope 4nm ~ 1 μm, in inorganic membrane assembly, tube side and shell side differential pressure design the scope of application is 0.1 ~ 0.6MPa, in inorganic membrane assembly, the flow-rate ratio design scope of application of total feed and the outer discharge capacity of concentrate is (10 ~ 200): 1, described feedstock pump, circulating pump and cleaning delivery side of pump are equipped with monitoring device, and monitoring device is used for the monitoring of parameter outlet temperature, pressure and flow, described flushing cisterns 62 and cleaning case 63 are equipped with liquid level monitoring table, inorganic membrane assembly 2 is provided with differential pressure monitor, the quantity of inorganic membrane assembly 2 be traditionally arranged to be two open one standby or open one standby more.
During concrete use, liquid-solid or liquid to be filtered-liquid heterogeneous system medium, through liquid feed-line 1 introducing device, boosts through feedstock pump 12, and sends in the inorganic membrane assembly 2 of filter element after feed control valve 14 adjust flux; Wherein run membrane module I, operation membrane module II puts into operation, membrane module 23 for subsequent use is for subsequent use; Penetrating fluid after inorganic membrane assembly 2 filters through permeate line 3, and by discharger after penetrating fluid control valve 32 adjust flux; A concentrate part enters concentrate pipeloop 5, boosts through circulating pump 52, and by after concentrate circulation control valve 54 adjust flux, is incorporated to material liquid feed-line 1, carries out circulating filtration with raw material; Concentrate another part enters the outer comb line 4 of concentrate, arranges discharger after control valve 42 adjust flux outward through concentrate.
When device normally runs, the outer discharge capacity of concentrate is arranged control valve 42 outward by concentrate and is regulated, concentrate is arranged control valve 42 outward and can be set according to the flow-rate ratio of film pipe shell path difference pressure or assembly total feed and the outer discharge capacity of concentrate, it is 0.15 ~ 0.38MPa that shell path difference pressure is suitable for setting range, and flow-rate ratio is suitable for setting range for (10 ~ 200): 1.
When inorganic membrane assembly 2 is after long-term operation, when finding that running membrane module I (or running membrane module II) shell path difference pressure exceedes setting value 0.15 ~ 0.38MPa, on-line cleaning need be carried out to operation membrane module I (or running membrane module II); During on-line cleaning, first the terminal valve of membrane module 23 for subsequent use is opened, make spare package be incorporated to circulated filter system; The terminal valve that will run membrane module I (or running membrane module II) is again closed, and makes it to isolate from system, and gets through on-line cleaning technological process; Penetrating fluid (or demineralized water) in flushing cisterns 62 introduces cleaning pipeline 6, boost through scavenging pump 64, and after purge control valve 66 adjust flux, enter and run membrane module I (or running membrane module II), along flow direction, assembly tube side surface is rinsed, 10 ~ 300 seconds time, flushing liquor goes out device with the outer comb line 4 of concentrate; The cleaning agent drawn again in cleaning case 63 enters cleaning pipeline 6, boost through scavenging pump 64, and after purge control valve 66 adjust flux, enter and run membrane module I (or running membrane module II), along flow direction, assembly surface is cleaned, after cleaning fluid turns back to cleaning case 63, then deliver to membrane module operation membrane module I (or running membrane module II) by scavenging pump 64 extraction, so complete wash cycles, whole scavenging period 30 ~ 180 minutes; After cleaning terminates, all cleaning fluids loop back cleaning case 63, and remaining cleaning fluid is rinsed, again the penetrating fluid (or demineralized water) of flushing cisterns 62 is introduced cleaning pipeline 6, boost through scavenging pump 64, and after purge control valve 66 adjust flux, enter and run membrane module I (or running membrane module II), washing time 10 ~ 300 seconds, flushing liquor goes out device with the outer comb line 4 of concentrate; Operation membrane module I (or running membrane module II) after on-line cleaning, is in stand-by state.
Claims (10)
1. the filtering and purifying of a heterogeneous material, it is characterized in that: it comprises material liquid feed-line, inorganic membrane assembly, permeate line, the outer comb line of concentrate, concentrate pipeloop and cleaning pipeline, described material liquid feed-line is by raw material input channel, feedstock pump, raw material output channel and feed control valve composition, raw material input channel is connected with the input of feedstock pump, one end of raw material output channel is connected with raw material delivery side of pump, raw material output channel is provided with feed control valve, the other end of raw material output channel communicates with the tube-side inlet pipeline of inorganic membrane assembly, described permeate line is made up of penetrating fluid output channel and penetrating fluid control valve, and the arrival end of penetrating fluid output channel communicates with the penetrating fluid outlet side of the shell side of inorganic membrane assembly, and penetrating fluid output channel is provided with penetrating fluid control valve, the outer comb line of described concentrate is arranged control valve outward by the outer discharge pipe of concentrate and concentrate and is formed, and the outer arrival end of discharge pipe of concentrate communicates with the tube side concentrate outlet side of inorganic membrane assembly, and the outer discharge pipe of concentrate is provided with concentrate and arranges control valve outward, concentrate pipeloop is provided with between discharge pipe and raw material output channel outside described concentrate, concentrate pipeloop is made up of circulate input channel, circulating pump, concentrate circulation output channel and concentrate circulation control valve of concentrate, concentrate circulation input channel is connected with the input of circulating pump, one end of concentrate circulation output channel is connected with circulation delivery side of pump, concentrate circulation output channel is provided with concentrate circulation control valve, and the other end of concentrate circulation output channel communicates with raw material output channel, described cleaning pipeline is by cleaning input channel, flushing cisterns, cleaning case, scavenging pump, cleaning output channel and purge control valve, the discharge line of flushing cisterns and the discharge line of cleaning case all communicate with cleaning input channel, the input of scavenging pump is connected with cleaning input channel, cleaning delivery side of pump communicates with cleaning output channel, cleaning output channel is provided with purge control valve, and the cleaning other end of output channel communicates with the tube-side inlet pipeline of inorganic membrane assembly.
2. the filtering and purifying of heterogeneous material according to claim 1, is characterized in that: described inorganic membrane assembly is made up of inorganic film tube, and the inorganic membrane filtration layer of inorganic film tube is asymmetric compound structure, membrane aperture scope 4nm ~ 1 μm.
3. the filtering and purifying of heterogeneous material according to claim 1, is characterized in that: in described inorganic membrane assembly, tube side, the shell side differential pressure design scope of application are 0.1 ~ 0.6MPa; In inorganic membrane assembly, the flow-rate ratio design scope of application of total feed and the outer discharge capacity of concentrate is (10 ~ 200): 1.
4. the filtering and purifying of heterogeneous material according to claim 1, is characterized in that: described feedstock pump, circulating pump and cleaning delivery side of pump are equipped with monitoring device, and monitoring device is used for the monitoring of parameter outlet temperature, pressure and flow; Described flushing cisterns and cleaning case are equipped with liquid level monitoring table; Inorganic membrane assembly is provided with differential pressure monitor.
5. the filtering and purifying of heterogeneous material according to claim 1, is characterized in that: the quantity of described inorganic membrane assembly be traditionally arranged to be two open one standby or open one standby more.
6. the filtering and purifying of heterogeneous material as claimed in claim 1 is used for a method for the heterogeneous material of filtration, purification, it is characterized in that comprising the following steps:
(1) inorganic membrane filtration separation is carried out to the heterogeneous system medium that petrochemical plant produces, heterogeneous system medium to be filtered enters inorganic membrane assembly after feedstock pump boosts, raw material enters the tube side of inorganic membrane assembly, and filter through filmed passing tube, the shell side of the film pipe from inorganic membrane assembly of penetrating fluid after filtering flows out and collects, discharged by inorganic membrane assembly penetrating fluid discharge port, enter downstream unit and carry out processing process; The concentrate do not filtered by inorganic film tube is flowed out from the tube side of inorganic membrane assembly and collects, concentrate outlet side through inorganic membrane assembly is discharged, and after circulating pump boosting, enter the tube-side inlet pipeline of inorganic membrane assembly, again enter inorganic membrane assembly and carry out isolated by filtration together with raw material, so realize the circulating filtration of concentrate; In circulating filtration process, along with the continuous discharge of penetrating fluid, the concentration of concentrate can rise gradually, pressure reduction between the tube side of inorganic membrane assembly and shell side can raise gradually, when differential pressure reaches setting value, arrange concentrate outside needing, outer row's concentrate is according to different in kind, and selected different technique processes;
(2) when inorganic membrane assembly is after long-term operation, when the tube side of inorganic membrane assembly film pipe and the differential pressure of shell side exceed setting value, need to carry out on-line cleaning to inorganic membrane assembly, in advance penetrating fluid (or demineralized water) is stored in flushing cisterns, cleaning agent configures and is placed in cleaning case; During on-line cleaning, first the terminal valve of membrane module for subsequent use is opened, make membrane module for subsequent use be incorporated to inoranic membrane circulating filtration unit; Again by the import and export valve closing of inorganic membrane assembly to be cleaned, inorganic membrane assembly to be cleaned is isolated from system, and gets through on-line cleaning technological process; First draw the penetrating fluid (or demineralized water) in flushing cisterns, after scavenging pump boosting, enter in inorganic membrane assembly to be cleaned, along flow direction, film pipe tube side surface in inorganic membrane assembly is rinsed, washing time 10 ~ 300 seconds, flushing liquor enters the concentrate pipeline of system cloud gray model with concentrate discharge port; Draw the cleaning agent in cleaning case again, after scavenging pump boosting, enter inorganic membrane assembly to be cleaned, along flow direction, film tube-surface is cleaned, after cleaning fluid turns back to cleaning case, extracted out by scavenging pump again and deliver to inorganic membrane assembly, complete the process of wash cycles, whole scavenging period 30 ~ 180 minutes; After cleaning terminates, cleaning fluid loops back cleaning case, and remaining cleaning fluid is rinsed, again introduce the penetrating fluid (or demineralized water) of flushing cisterns, after scavenging pump boosting, enter inorganic membrane assembly, washing time 10 ~ 300 seconds, flushing liquor enters the concentrate pipeline of system cloud gray model, and the inorganic membrane assembly after on-line cleaning, is in stand-by state.
7. the filtering and purifying of heterogeneous material according to claim 6 is used for the method for the heterogeneous material of filtration, purification, it is characterized in that: the outer row's concentrate described in step (1) selectes different processing technologys according to the difference of medium; When system disposes of sewage oil containing medium, outer row's concentrate returns separator or slop tank, increases the sedimentation separation time of sewage with oil medium; When system process amine liquid or oil product contain solid medium, outer row's concentrate returns disused aine liquid or slop tank, increases the sedimentation separation time of amine liquid or oil product, and amine liquid or Oil Recovery utilize, thus are removed by solid impurity; When system process catalytic slurry, slop tank delivered to by outer row's concentrate, and the sump oil after concentrate sedimentation can be recycled.
8. the filtering and purifying of heterogeneous material according to claim 6 is used for the method for the heterogeneous material of filtration, purification, it is characterized in that: the outer discharge capacity of described concentrate when normal production regulates according to the flow-rate ratio of film pipe shell path difference pressure or assembly total feed and the outer discharge capacity of concentrate, tube side and the shell side differential pressure scope of application are 0.15 ~ 0.38MPa, and the flow-rate ratio scope of application is (10 ~ 200): 1.
9. the filtering and purifying of heterogeneous material according to claim 6 is used for the method for the heterogeneous material of filtration, purification, it is characterized in that: in step (2), inorganic membrane assembly carries out the tube side of the film pipe of on-line cleaning and shell side differential pressure is 0.05 ~ 0.15MPa.
10. the filtering and purifying of heterogeneous material according to claim 6 is used for the method for the heterogeneous material of filtration, purification, it is characterized in that: the filter type of described inorganic membrane assembly adopts cross-flow filtration, raw material enters from inorganic membrane assembly tube side, after inorganic film tube filters, penetrating fluid is discharged from inorganic membrane assembly shell side, and concentrate carries out circulating filtration after being discharged by tube side.
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