CN103848529B - Reverse osmosis-based high-concentration sewage treatment method - Google Patents
Reverse osmosis-based high-concentration sewage treatment method Download PDFInfo
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- CN103848529B CN103848529B CN201410072039.4A CN201410072039A CN103848529B CN 103848529 B CN103848529 B CN 103848529B CN 201410072039 A CN201410072039 A CN 201410072039A CN 103848529 B CN103848529 B CN 103848529B
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention discloses a reverse osmosis-based high-concentration sewage treatment method. The reverse osmosis-based high-concentration sewage treatment method comprises the following steps of firstly pre-filtering and pre-heating the sewage; carrying out the reverse osmosis treatment on the preheated sewage; feeding the preheated sewage to the bottom of a reverse osmosis treatment device; feeding the sewage on the bottom into a primary sewage laminar flow passage through an elongated distributing hole, dispersing the sewage to the periphery of a laminar flow disc through a spoke-shaped guide passage arranged on the surface of the laminar flow disc, enabling the sewage to upwards reversely enter the other side of the passage when the sewage flows to the edge of the laminar flow disc, then converging the sewage onto a central hole, enabling the sewage to upwards reversely enter a secondary sewage laminar flow passage through the elongated distribution hole, circulating the sewage to form a radiated S-shaped route from bottom to top, and finally discharging the sewage through a concentrated liquid discharging port; a water purification component permeates a reverse osmosis membrane of a filter membrane assembly to be conveyed to a permeate liquid outlet to be discharged. The reverse osmosis-based high-concentration sewage treatment method has the advantages of high sewage treatment efficiency, high water yield, low energy consumption, long service life of the filter membrane and the like.
Description
Technical field
The invention belongs to high-concentration sewage process field, be specifically related to a kind of hydromeehanics hydraulic principle that utilizes and carry out the process for treating high-concentration sewage based on reverse osmosis researched and developed.
Background technology
In recent years, many new technologies are being applied to high-concentration sewage process, develop rapidly as achieved in landfill leachate treatment.The good class of current application trend is the application of membrane technique, comprises microfiltration membrane, ultra-filtration membrane, nanofiltration membrane and reverse osmosis membrane etc.Adopt the advantage of membrane technique to be that effluent quality is better, higher emission request can be reached.But disc tube reverse osmosis (dt-ro) of the prior art (DTRO) membranous system, its flow guiding disc surface is provided with convex dot shape structure as flow-guiding structure, and as shown in Figure 7, this structure easily makes waterpower carry out burst diffusion, causes system capacity loss to increase; And its diaphragm shapes is circular, as shown in Figure 8, easily causes local pressure to cross ambassador's diaphragm and is penetrated infringement.
Generally speaking, affect by Different factor, in operation process, energy consumption is higher, producing water ratio is lower, outlet effect is unstable for membrane treatment appts of the prior art, service life of equipment is shorter, by the restriction of these defects, there is certain bottleneck when being applied to the process of the high-concentration sewages such as percolate in membrane technology.Therefore, find that a kind of processing efficiency is higher, producing water ratio is high, outlet effect is good, energy consumption is low, the process for treating high-concentration sewage of diaphragm longer service life seems particularly urgent.
Summary of the invention
Technical problem to be solved by this invention is: for the deficiencies in the prior art, provide a kind of simple and compact for structure, sewage treating efficiency is high, producing water ratio is high, outlet effect is good, energy consumption is low, the process for treating high-concentration sewage based on reverse osmosis of filtering membrane long service life.
For solving the problems of the technologies described above, the present invention realizes by the following technical solutions:
Based on a process for treating high-concentration sewage for reverse osmosis, comprise the following steps:
A. pre-filtering process: utilize strainer to carry out pre-filtering process to pending high-concentration sewage;
B. preheat process: the sewage after pre-filtering process is sent into preheating apparatus and carries out thermal pretreatment;
C. reverse-osmosis treated: the sewage being preheated to suitable temp is sent into reverse osmosis treatment device and carries out reverse-osmosis treated, sewage after preheating flows into from the sewage inlet of reverse osmosis treatment device, multi-stage annular laminar flow dish and filter membrane component that union lever string establishes is provided with in reverse osmosis treatment device, and between adjacent two layers flow table, a filter membrane component is set, form tubular layer flow table assembly at putamina inner chamber after multilayer layer flow table superposes mutually, laminar flow dish assembly be provided with a vertical feed pathway be communicated with described sewage inlet between putamina inwall, the upper end of laminar flow dish assembly is fixed in the joint flange of reverse osmosis treatment device, the end flange spaced apart formation bottom liquid inlet passage of lower end and reverse osmosis treatment device, and the sewage that sewage inlet is flowed into enters into bottom liquid inlet passage by vertical feed pathway, each laminar flow dish is circumferentially evenly equipped with multiple long strip shape tap hole sewage laminar flow channel be communicated with near its central hole, by the one-level sewage laminar flow channel that the long strip shape tap hole offered makes the sewage in bottom liquid inlet passage enter into be formed between bottom layer flow table and filter membrane component, and then by many spoke-like flow-guiding channels that laminar flow panel surface is arranged, sewage is spread along bottom layer flow table to surrounding, when effluent stream is to bottom layer flow table edge, by the space between bottom layer flow table and filter membrane component upwards and carry out 180 ° and reverse, then the opposite side of one-level sewage laminar flow channel is entered into, in the opposite side of sewage laminar flow channel, sewage converges to central hole by surrounding, then the long strip shape tap hole arranged by upper level laminar flow disk center is upwards reversed and enters into B-grade sewage laminar flow channel, so move in circles, sewage is formed and radially (converges to centre hole by laminar flow dish periphery in laminar flow dish assembly part, be radiated the circulation of neighboring again), and S shape path from lower to upper, concentrated solution relief outlet finally by reverse osmosis treatment device is discharged,
In the flow process of sewage, the water purification composition contained in sewage is leached by the filter membrane component in every one-level sewage laminar flow channel, the outward flange of described filter membrane component closes, preglabellar field opening, water purification composition is by the reverse osmosis membrane through filter membrane component, and be delivered to the permeate passage of filter membrane component preglabellar field opening in communication by the thread support in filter membrane component middle layer, and finally export discharge by permeate.The central aperture edge of described laminar flow dish is provided with multiple radial indentation, and the radial indentation of each laminar flow dish is interconnected and forms described permeate passage in described union lever periphery.Described putamina two ends are sealedly connected with joint flange and end flange, and the outlet of described sewage inlet, permeate and concentrated solution relief outlet are opened on described joint flange.
As the further improvement to the invention described above, many the spoke-like flow-guiding channels that described laminar flow panel surface is arranged outwards disperse along the radiation direction of described long strip shape tap hole, by arranging a distributing damper near the outer peripheral position of laminar flow dish in spoke-like flow-guiding channel, make the sewage poured in from described long strip shape tap hole in the process that surrounding spreads, impact described distributing damper and form turbulent flow, described distributing damper is 1/4 ~ 1/2 of laminar flow dish radius length along the length of laminar flow dish radial direction.The open area of spoke-like flow-guiding channel is divided equally by described distributing damper substantially.
In above-mentioned process for treating high-concentration sewage, preferably, described pre-filtering process installs lift pump in sewage equalizing tank, pending high-concentration sewage is entered into strainer by lift pump macrobead thing and contaminant filter are fallen, ensure that dirty impurities in water is less, the sewage after filtration by Cemented filling in preheating apparatus.
In above-mentioned process for treating high-concentration sewage, preferably, described preheat process utilizes preheating apparatus by heat-transfer medium preheating, heat-transfer medium after preheating transfers heat to the sewage in sewage preheating pond at heating pipe line internal recycle, and by the temperature regulator in preheating apparatus, the temperature of sewage in sewage preheating pond is controlled at 25 DEG C ~ 50 DEG C, reach the sewage after suitable temp again by Cemented filling to the sewage inlet of reverse osmosis unit.Preferred, the sewage temperature after described preheat process controls at about 32 DEG C.Preferably, described preheating apparatus is air energy/sun power/biogas combustion heating system, and described heat-transfer medium is clear water or thermal oil.Pre-heating temperature controls at about 32 DEG C, and system producing water ratio can be made to be optimum regime.Reverse osmosis membrane in filter membrane component belongs to organic membrane category, and its internal void has the characteristic of expanding with heat and contract with cold, and when temperature reduces, hole reduces, and producing water ratio is lower; When temperature raises, hole amplifies, and producing water ratio is higher.25 DEG C is its stagnation point, and when water temperature is lower than 25 DEG C, often decline 1 DEG C, membranous system producing water ratio declines 3%.Temperature more than 50 DEG C after, diaphragm then can by irreversible damage.
In above-mentioned process for treating high-concentration sewage, preferably, the concentrated solution of discharging from the concentrated solution relief outlet of reverse osmosis treatment device processes through low-temperature evaporation treatment process, and this low-temperature evaporation treatment process comprises the following steps:
Utilize preheating of air assembly to carry out thermal pretreatment to air, the warm air after preheating is sent into the hot-air inlets end of a low temperature plate type evaporating apparatus;
Utilize sewage preheating assembly to carry out thermal pretreatment to treatment sewage, the sewage after preheating is sent into the wastewater inlet end of described low temperature plate type evaporating apparatus;
Described low temperature plate type evaporating apparatus is multi-layer plate-type structure, and be laminated primarily of multi-layer evaporation plate, make the concentrated solution entered in low temperature plate type evaporating apparatus on multi-layer evaporation plate, form successive layers stream-like liquid film from top to bottom by the flow control component in sewage preheating assembly, the warm air entered in low temperature plate type evaporating apparatus is made to form continuous upstream from bottom to top between multi-layer evaporation plate by preheating of air assembly, in low temperature plate type evaporating apparatus, make continuous upstream and successive layers stream-like liquid film carry out counter current contact, in counter current contact process, continuous upstream makes the moisture in successive layers stream-like liquid film constantly evaporate, continuous upstream finally forms saturated vapor steam flow and arrives the top area of low temperature plate type evaporating apparatus after multi-layer evaporation plate, its hot air outlet arranged via low temperature plate type evaporating apparatus top is discharged, successive layers stream-like liquid film, after fully evaporating, is separated out with crystalline form, the concentrated solution do not evaporated is guided to the bottom of low temperature plate type evaporating apparatus in evaporation plate, and the concentrated solution relief outlet it arranged bottom low temperature plate type evaporating apparatus is discharged.
In above-mentioned process for treating high-concentration sewage, preferably, described wastewater inlet end is arranged on the top of multi-layer evaporation plate, one end of every one deck evaporation plate in multi-layer evaporation plate is fixed, the other end overflow, and the location arrangements of the inboardend of adjacent two layers evaporation plate and effluent head is contrary, by the vibrational power flow of multi-layer evaporation plate by successive layers stream-like liquid film with the downward water conservancy diversion of S shape mode; One over-pass is set at the effluent head of every layer of evaporation plate, by the height of overflow weir that the height of controlling water kick baffle plate or over-pass are offered, the thickness of liquid film of successive layers stream-like liquid film in every one deck evaporation plate is successively decreased from top to down step by step; When successive layers stream-like liquid film is to the evaporation plate of the lowest layer, its thickness of liquid film controls be limited just to evaporate.
In above-mentioned process for treating high-concentration sewage, preferably, the lower surface of one deck evaporation plate every in described multi-layer evaporation plate is arranged to lenticular dentation or wavelike structure, described continuous upstream is made to form local turbulence turbulent flow at the gas channel between adjacent two layers evaporation plate by regulating air flow controller, and make warm air above the liquid film of evaporation plate, form multiple Scroll-tupe partial circulating along gas channel direction, warm air and successive layers stream-like liquid film are contacted repeated multiple timesly.
In above-mentioned process for treating high-concentration sewage, preferably, described multi-layer evaporation plate is arranged to drawer type composite module structure, each drawer be one can the composite module of free assembly and disassembly, each drawer is made up of at least one deck evaporation plate, and multiple drawer superposes the agent structure forming described multi-layer evaporation plate up and down; By increasing drawer quantity between adjacent two layers evaporation plate, the length of successive layers stream-like liquid film is increased, and then extend the evaporation time of successive layers stream-like liquid film in low temperature plate type evaporating apparatus; Or by reducing drawer quantity between multi-layer evaporation plate, the length of successive layers stream-like liquid film is reduced, and then shorten the evaporation time of successive layers stream-like liquid film in low temperature plate type evaporating apparatus.
In above-mentioned process for treating high-concentration sewage, preferably, cavity volume in described low temperature plate type evaporating apparatus is separated into evaporation cavity and condensation recycling cavity, and evaporation cavity is located at middle part, condensation recycling cavity is located at the periphery of evaporation cavity, at low temperature plate type evaporating apparatus top, one condenser is set, the saturated vapor steam flow that continuous upstream is formed after multi-layer evaporation plate condenses at low temperature plate type evaporating apparatus top, by being arranged to coniform by the internal surface at low temperature plate type evaporating apparatus top, the phlegma of formation is guided to described condensation recycling cavity.
In above-mentioned process for treating high-concentration sewage, preferably, condensate outlet is offered in the bottom of described condensation recycling cavity, by transport pipe, the water of condensation of condensate outlet is delivered to a phlegma liquid storage tank, described phlegma liquid storage tank is formed primarily of the outlet sump two portions after back pool and backwater cooling, water of condensation is first caused back pool, water to be condensed is transferred to outlet sump after lowering the temperature in back pool, water of condensation after cooling is caused the water-in of described condenser by outlet sump again by pipeline, described condenser is water cooled condenser, when passing through its water outlet after the water in condenser heats up again by condensing hot air furnace to described back pool, recycle like this.
In above-mentioned process for treating high-concentration sewage, preferably, the hot air outlet and one that described low temperature plate type evaporating apparatus top is arranged reclaims assembly and is communicated with, the warm air of discharging from hot air outlet is first caused a steam-water separation tank, steam-water separation tank is utilized to carry out carbonated drink separating treatment to being with the warm air had surplus heat, the water of condensation formed after carbonated drink is separated can qualified discharge, warm air after separation continues through the bottom formation circulation of Cemented filling to low temperature plate type evaporating apparatus, controlled by the airshed of the air flow controller in preheating of air assembly to low temperature plate type evaporating apparatus internal recycle, unnecessary air is undertaken purifying rear qualified discharge by photochemical catalytic oxidation odor removal.
Compared with prior art, the advantage for the treatment of process of the present invention is:
1, the film fouling of minimum level and contamination phenomenon: the laminar flow dish possessing the spoke-like flow-guiding channel of band of wider (more than 3mm) open wide runner and uniqueness in the present invention, feed liquid forms turbulence state in assembly, decreases the generation of film surface scale, pollution and concentration polarization phenomenon to the full extent.
2, film long service life: the present invention effectively can avoid the fouling of filter membrane component, and fouling membrane alleviates, and makes the life of filtering membrane.Special structure and Hydraulic design make film group be easy to cleaning, and after cleaning, flux recovery is very good, thus extends the diaphragm life-span.
3, assembly is easy to safeguard: the filter membrane component in the present invention adopts standardized designs, assembly is easy to demolition and maintenance, opening assembly can the easily any a slice filtering membrane of Inspection and maintenance and other parts, easy to maintenance, when amount of parts is inadequate, assembly allows to fill less some filtering membranes and laminar flow dish and does not affect the use of filter membrane component, and this is that other form membrane module is beyond one's reach.Because the inner any single parts of device of the present invention all allow independent replacing, filtration fraction is assembled by multiple filter membrane component and laminar flow dish, single replacing can be carried out when filter membrane component need be changed, still can continue to use for the diaphragm that strainability is good, this decreases and changes film cost in maximum program, and this is that other form membrane module such as rolling, tubular fibre is beyond one's reach.
When 4, utilizing process high-concentration sewage of the present invention, its relatively traditional biochemical process not only effluent quality is good, all has high clearance to every pollutent; And stable water outlet, affect little by extraneous factor, because the factor affecting membranous system rejection is less, so system effluent quality is very stable, not by the impact of the factor such as biodegradability, carbon-nitrogen rate.
Generally speaking, reverse osmosis treatent method for high-concentration sewage process of the present invention, by being formed, there is spoke-like flow-guiding channel, turbulent flow can be formed when sewage flows between laminar flow dish and filter membrane component, at utmost reduce the generation of film surface scale, pollution and concentration polarization phenomenon, make filter membrane component be easy to cleaning, after cleaning, flux recovery is very good, substantially prolongs the work-ing life of filter membrane; Due to filter membrane component adopt standardized designs, be easy to demolition and maintenance, single parts all allow independent replacing, replacement charge and working cost low; And the reverse osmosis membrane in the present invention all has high clearance to every pollutent, effluent quality is good, water conditioning; This plant area area is little, the construction period is short, level of automation is high, and operation is very flexible, can run continuously, also can intermittent operation, can also the series-parallel system of adjustment System, adapts to the requirement of water quality and quantity.
In addition, method for high-concentration sewage process of the present invention also uses efficient cryogenic evaporation technique, it simulates " typhoon effect ", utilize saturated steam to meet cold condensation heat regional area above low temperature plate type evaporating apparatus and form negative pressure, and then produce a kind of natural pulling force and make the warm air bottom low temperature plate type evaporating apparatus increase continually; Again by reclaiming the connection of assembly, warm air can be made between low temperature plate type evaporating apparatus and recovery assembly to form closed loop, move in circles, thus efficiency utilization air waste heat, realize the moisture in efficient cryogenic evaporation sewage.By utilizing " seawater is evaporated brine " principle, sewage can be evaporated under low temperature (40 DEG C ~ 60 DEG C) state, compared with traditional high temperature (100 DEG C ~ 120 DEG C) distillating method, not only energy-conservation, and environmental protection, in water of condensation, the content of objectionable impurities is low, meets national grade one discharge standard, does not need again to process to discharge.
Treatment process of the present invention not only vaporization efficiency is high, by utilizing lenticular dentation bottom drawer type evaporation plate or wavelike structure in preferred technical scheme, upstream is met obstructions and forms local turbulence formula partial circulating, force upstream and liquid film multiple-contact, significantly improve the vaporization efficiency under low-temperature condition; By adopting modular designs, make sewage preheating assembly, preheating of air assembly, low temperature plate type evaporating apparatus and reclaim assembly etc. all to arrange open interface, not only be convenient to the assembly and connection between each assembly module, and be conducive to the independent upgrading between each assembly module.And low temperature plate type evaporating apparatus can be designed to preferred composite module structure further, namely single low temperature plate type evaporating apparatus can according to sewage load and process time length, to increase or to reduce the quantity of drawer type composite module, also multiple low temperature plate type evaporating apparatus can be carried out parallel connection in addition, separately carry out sewage disposal simultaneously, can be increased sharply after the parallel connection of multiple low temperature plate type evaporating apparatus treatment capacity, raise the efficiency, and when a wherein low temperature plate type evaporating apparatus is when carrying out the cleaning of crystallisate, other low temperature plate type evaporating apparatus can run simultaneously, to ensure the continuity of sewage disposal, even if individual module breaks down also do not affect the operation of whole treatment unit.
Generally speaking, the whole treatment process based on reverse osmosis and low-temperature evaporation technology of the present invention not only flexible operation (can run continuously, also can intermittent operation, the series-parallel system of all right adjustment System, adapt to the requirement of water quality and quantity), and the whole system construction period is short, debugs, start rapidly, equipment transports on-the-spot rear to needs the time installation and debugging work of about two weeks just can complete; Whole system level of automation is high; operation runs easy; treatment system of the present invention can be designed to full rotation type; whole system is provided with perfect monitoring, Controlling System; PLC can regulate automatically according to sensor parameters, sends guard signal in good time, forms protection to system; operator only need search error code according to operational manual and fix a breakdown, and do not have too high requirement to the experience of operator.The process treatment process of whole reverse osmosis system is simple, cost of investment is low, and energy consumption is low, and safeguard that operation is simple and convenient, better economic benefit, the sewage final product of process is the clear water of about 97% and the crystallisate of about 3%, can realize pollutent " zero " discharge.
Accompanying drawing explanation
Fig. 1 is the process flow sheet in the treatment process of the embodiment of the present invention before reverse-osmosis treated.
Fig. 2 is the cross-sectional view of reverse osmosis treatment device in the treatment process of the embodiment of the present invention.
Fig. 3 is that in the treatment process of the embodiment of the present invention, sewage flows to schematic diagram in reverse osmosis treatment device.
Fig. 4 is the plan structure schematic diagram of reverse osmosis treatment device internal layer flow table in the treatment process of the embodiment of the present invention.
Fig. 5 is the plan structure schematic diagram of reverse osmosis treatment device internal layer flow table and filter membrane component combination in the treatment process of the embodiment of the present invention.
Fig. 6 is the structural representation of filter membrane component in reverse osmosis treatment device in the treatment process of the embodiment of the present invention.
Fig. 7 is the structural representation of flow guiding disc in common disc tube reverse osmosis (dt-ro) device.
Fig. 8 is the structural representation of diaphragm in common disc tube reverse osmosis (dt-ro) device.
Fig. 9 is the process flow sheet of the treatment process of the embodiment of the present invention.
Figure 10 is the technical process schematic diagram of low temperature plate type evaporating apparatus in the treatment process of the embodiment of the present invention.
Figure 11 is the partial enlarged drawing of evaporation plate in the treatment process of the embodiment of the present invention.
Marginal data:
1, laminar flow dish; 2, filter membrane component; 3, O RunddichtringO; 4, end flange; 5, lip-type packing; 6, joint flange; 7, Sealed casing pipe; 8, union lever pad; 9, nut; 10, sewage inlet; 11, union lever; 12, permeate outlet; 13, permeate collector; 14, concentrated solution relief outlet; 15, putamina; 16, thread support; 18, distributing damper; 19, long strip shape tap hole; 20, radial indentation; 21, reverse osmosis membrane; 22, leachate equalization basin; 23, lift pump; 24, strainer; 25, preheating apparatus; 26, reverse osmosis treatment device; 27, water back; 28, temperature regulator; 29, percolate preheating pond; 30, spoke-like flow-guiding channel; 31, permeate passage; 32, evaporation plate; 33, lenticular dentation; 34, hot air outlet; 35, steam-water separation tank; 36, induced draft fan; 37, photochemical catalytic oxidation odor removal; 38, condenser; 39, condensation recycling cavity; 40, phlegma liquid storage tank; 41, back pool; 42, outlet sump.
Embodiment
For the ease of understanding the present invention, hereafter will do to describe more comprehensively, meticulously to the present invention in conjunction with Figure of description and preferred embodiment, but protection scope of the present invention is not limited to following specific embodiment.
It should be noted that, when a certain element is described on " be fixed on or be connected to " another element, it can be directly fix or be connected on another element, also can be indirectly fixed by other intermediate connectors or be connected on another element.
Unless otherwise defined, hereinafter used all technical terms are identical with the implication that those skilled in the art understand usually.The object of technical term used herein just in order to describe specific embodiment is not be intended to limit the scope of the invention.
Embodiment:
As shown in Figure 1, a kind for the treatment of process of the percolate based on reverse osmosis of the present invention, the method comprises the following steps:
(1) pre-filtering process:
As shown in fig. 1, percolate lift pump 23 is installed in leachate equalization basin 22, pending percolate enters into strainer 24 by lift pump 23, the macrobead thing in former for percolate water and contaminant filter is fallen in strainer 24, ensures that in percolate, impurity is less.
(2) preheat process:
By the percolate after pre-filtering process by carrying out thermal pretreatment in Cemented filling to preheating apparatus 25; In the present embodiment, preheat process utilizes biogas combustion heating system, by heat-transfer medium (clear water or thermal oil) preheating, heat-transfer medium after preheating is at water back 27 internal recycle, transfer heat to the percolate in percolate preheating pond 29, and by the temperature regulator 28 in preheating apparatus 25, the temperature of percolate in percolate preheating pond 29 is controlled at about 32 DEG C, reach the percolate after suitable temp by Cemented filling to the sewage inlet 10 of reverse osmosis treatment device 26.The pre-heating temperature of sewage is controlled at about 32 DEG C, the producing water ratio for the treatment of system can be made to be optimum regime, because the reverse osmosis membrane of filter membrane component belongs to organic membrane category in reverse osmosis treatment device 26, its internal void has the characteristic of expanding with heat and contract with cold, when temperature reduces, hole reduces, and producing water ratio is lower; When temperature raises, hole amplifies, and producing water ratio is higher.25 DEG C is its stagnation point, and when water temperature is lower than 25 DEG C, often decline 1 DEG C, membranous system producing water ratio declines 3%; Temperature more than 50 DEG C after, diaphragm then can by irreversible damage, and the garbage filter liquid temp therefore after preheating generally should control, at 25 DEG C ~ 50 DEG C, to be chosen as about 32 DEG C in the present embodiment.
(3) reverse-osmosis treated:
Percolate after preheating is sent into reverse osmosis treatment device 26 and carries out reverse-osmosis treated; Percolate after preheating flows into from the sewage inlet 10 of reverse osmosis treatment device 26, be provided with union lever 11 in reverse osmosis treatment device and go here and there the multi-stage annular laminar flow dish 1 and filter membrane component 2 established, and a filter membrane component 2 is set between adjacent two layers flow table 1, form tubular layer flow table assembly at putamina inner chamber after multilayer layer flow table 1 superposes mutually, between laminar flow dish assembly with putamina 15 inwall, be provided with a vertical feed pathway be communicated with sewage inlet 10; The upper end of laminar flow dish assembly is fixed in the joint flange 6 of reverse osmosis treatment device 26, the end flange 4 spaced apart formation bottom liquid inlet passage of lower end and reverse osmosis treatment device 26, the percolate that sewage inlet 10 is flowed into enters into bottom liquid inlet passage by vertical feed pathway.
Spaced apart formation sewage laminar flow channel between each laminar flow dish 1 and between laminar flow dish 1 and filter membrane component 2, each laminar flow dish 1 is circumferentially evenly equipped with the multiple long strip shape tap hole 19 sewage laminar flow channel of each layer be communicated with near its central hole, by the one-level sewage laminar flow channel that the long strip shape tap hole 19 offered makes the percolate in bottom liquid inlet passage enter into be formed between bottom layer flow table 1 and filter membrane component 2, and then by surperficial many spoke-like flow-guiding channels 30 arranged of laminar flow dish 1, percolate is spread along bottom layer flow table 1 to surrounding, when percolate flow to bottom layer flow table 1 edge, undertaken 180 ° by the space between bottom layer flow table 1 and filter membrane component 2 to reverse, then the opposite side (passage namely formed between filter membrane component 2 another side and upper level laminar flow dish) of one-level sewage laminar flow channel is entered into, in the opposite side of sewage laminar flow channel, sewage converges to central hole by surrounding, then the long strip shape tap hole 19 arranged by upper level laminar flow dish 1 center is continued upwards and reverses and enter into B-grade sewage laminar flow channel, so move in circles, percolate is formed and radially (converges to centre hole by laminar flow dish periphery in laminar flow dish assembly, be radiated the circulation of neighboring again), and S shape path from lower to upper, concentrated solution relief outlet 14 finally by reverse osmosis treatment device 26 is discharged.
In the flow process of percolate, the water purification composition contained in percolate is leached by the filter membrane component 2 in every one-level sewage laminar flow channel, the outward flange of filter membrane component 2 closes, preglabellar field opening, when water purification composition carries out laminar flow with percolate, by with the reverse osmosis membrane 21 of the shortest distance fast strikethrough filter membrane component 2, and be delivered to the permeate passage 31 of filter membrane component 2 preglabellar field opening in communication by the thread support 16 in filter membrane component 2 middle layer, and finally export 12 discharges by permeate; This not only effectively can reduce energy waste, mitigation system pressure, and the capacity usage ratio that can improve system.
Many the spoke-like flow-guiding channels 30 that laminar flow dish 1 surface of the present embodiment is arranged outwards disperse along the radiation direction of long strip shape tap hole 19, by arranging a distributing damper 18 near the outer peripheral position of laminar flow dish 1 in spoke-like flow-guiding channel 30, make the percolate poured in from long strip shape tap hole 19 in the process that surrounding spreads, impact distributing damper 18 and form turbulent flow, distributing damper 18 is 1/3 of laminar flow dish 1 radius length along the length of laminar flow dish 1 radial direction.The open area of spoke-like flow-guiding channel 30 is divided equally by distributing damper 18 substantially.
The reverse osmosis treatment device 26 used in above-mentioned the present embodiment is as shown in Fig. 2 ~ Fig. 6, and its core of filtering is the laminar flow dish 1 that multilayer is arranged, and laminar flow dish 1 is separated into many spoke-like flow-guiding channels 30 by spoke-like baffle plate.Putamina 15 two ends are sealedly connected with joint flange 6 and end flange 4, union lever 11 are equiped with above joint flange 6 the permeate collector 13 of hollow, and fastening by the nut 9 on union lever 11; Union lever 11 lower end is equiped with Sealed casing pipe 7 above end flange 4, is equiped with union lever pad 8 and fastening by the nut 9 on union lever 11 below end flange 4.Permeate outlet 12 is opened in the side of permeate collector 13.Sewage inlet 10 and concentrated solution relief outlet 14 are opened on joint flange 6.The central aperture edge of laminar flow dish 1 is provided with many radial indentation 20, and the radial indentation 20 of each laminar flow dish 1 is interconnected and forms above-mentioned permeate passage 31 in union lever 11 periphery.Filter membrane component 2 is three layers of sandwich ring structure of octagon for periphery, the reverse osmosis membrane 21 comprising two-layer concentric setting and the thread support 16 be located in therebetween.Neighboring ultrasonic technology welding formation one welding edge of this shellring shape material, the opening-like formation pure water inlet of preglabellar field is communicated to permeate passage 31.Joint flange 6, to be tightly connected by lip-type packing 5 between end flange 4 and putamina 15, to ensure that the filter assemblies pressure be in the course of the work made up of laminar flow dish 1 and filter membrane component 2 is reduced the loss and water does not leak.Between laminar flow dish 1 and filter membrane component 2, be all tightly connected by O RunddichtringO 3 between permeate collector 13 and union lever 11 and joint flange 6.O RunddichtringO 3 on laminar flow dish 1 can prevent percolate from entering permeate passage 31.The open runner of 3mm (passage that next stage laminar flow dish end face and adjacent upper level laminar flow are tried to get to the heart of a matter between face) is adopted in reverse osmosis treatment device 26, compare traditional device, the reverse osmosis treatment device 26 used in the present invention makes that percolate processing efficiency is higher, producing water ratio is higher, outlet effect is better, energy consumption is lower, filtering membrane longer service life.
(4) concentrated solution process:
The percolate of being discharged by the concentrated solution relief outlet 14 of above-mentioned reverse osmosis treatment device 26 concentrates liquid, and the present embodiment adopts low-temperature evaporation treatment process to process, and its technological process as shown in Figure 9, specifically comprises the following steps:
Collect the biogas of refuse landfill, utilize heating unit (i.e. biogas burning boiler) preheating heat-transfer medium (if present treatment device is used for high-concentration industrial-water process field, its main heating source can adopt sun power or air energy), using clear water or thermal oil as heat-transfer medium; Heat-transfer medium after preheating is at heating pipe line internal recycle; By the laying of heating pipe line, heat is first delivered in a Heating pool by heat-transfer medium, is provided with air heating conduits in Heating pool, heat is delivered in air delivery pipe by air heating conduits and makes preheating of air by Heating pool; Make the heat-transfer medium after Heating pool heat trnasfer continue heat to be delivered in a concentrated solution preheating pond by the laying of heating pipe line, to carry out heat supply to concentrated solution, the heat-transfer medium after the heat trnasfer of concentrated solution preheating pond is back in heating unit.The concentrated solution preheating assembly of the present embodiment and preheating of air assembly share a set of thermal source plenum system, and it comprises heating unit and heating pipe line, and heating pipe line generally adopts stainless steel pipes.Concentrated solution preheating assembly in the present embodiment comprises concentrated solution preheating pond, heating pipe line extends to heat supply in concentrated solution preheating pond, concentrated solution preheating pond is communicated to the concentrated solution entrance end of low temperature plate type evaporating apparatus through concentrated solution transferpump and concentrated solution transport pipe, concentrated solution transport pipe is also provided with flow control component (such as flow pump).Preheating of air assembly comprises the air flow controller that gas blower, air delivery pipe and air delivery pipe back segment are arranged, and air delivery pipe is finally communicated to the hot-air inlets end of low temperature plate type evaporating apparatus, and hot-air inlets end place is provided with nozzle.Heating pipe line transfers heat to concentrated solution in concentrated solution preheating pond, and concentrated solution is heated to about 50 DEG C, and the concentrated solution after preheating sends into the concentrated solution entrance end of low temperature plate type evaporating apparatus by flow control component.Outside air first enters air delivery pipe through gas blower, warm air (about 30 DEG C) after air heating conduits preheating is admitted to the hot-air inlets end of low temperature plate type evaporating apparatus again by an induced draft fan, hot-air inlets end is located at the bottom section (i.e. Ith district of Figure 10) of low temperature plate type evaporating apparatus.
As shown in Figure 10, low temperature plate type evaporating apparatus is airtight drawer type multilayer plank frame; The principle evaporation concentration liquid of its simulation " seawater is evaporated brine "; Make concentrated solution on multi-layer evaporation plate 32, form successive layers stream-like liquid film from top to bottom by flow control, because the special construction of multi-layer evaporation plate 32 in the present embodiment treatment unit designs, make successive layers stream-like liquid film descending with serpentine mode water conservancy diversion, and the thickness of liquid film reduces from top to bottom step by step, the thickness of liquid film to the drawer type evaporation plate of the lowest layer is limited just to evaporate; Meanwhile, the warm air entered by hot-air inlets end slowly brushes the laminar flow shape liquid film in each layer evaporation plate 32 from bottom to top in low temperature plate type evaporating apparatus.In the low temperature plate type evaporating apparatus of the present embodiment, the lower surface of one deck evaporation plate 32 every in multi-layer evaporation plate 32 is arranged to continuous upstream can be impelled to form lenticular dentation 33(or the wavelike structure of local turbulence turbulent flow), this makes upstream can meet obstructions when through each layer evaporation plate 32 and form local turbulence turbulent flow (see Figure 11), force warm air and liquid film to contact repeated multiple timesly, warm air can form multiple Scroll-tupe partial circulating above evaporation plate liquid film, continuous upstream is final after multi-layer evaporation plate 32 forms the top area (i.e. IIth district of Figure 10) that saturated vapor steam flow arrives low temperature plate type evaporating apparatus.
The low temperature plate type evaporating apparatus of the present embodiment simulates " typhoon " effect further, a water cooled condenser is equiped with at its top, the saturated steam in arrival device inner top region (IIth district) is made to meet condensation knot, release of heat in the process of condensation, and then form negative pressure in low temperature plate type evaporating apparatus top area, make this region produce a kind of pulling force impelling warm air upwards ascension, constantly rise to drive the warm air bottom low temperature plate type evaporating apparatus.Under slowly the brushing of warm air, in low temperature plate type evaporating apparatus, the moisture of concentrated solution is constantly evaporated; The concentration of concentrated solution is more and more higher, and after evaporation reaches the saturation concentration of solute in concentrated solution, inorganic ion can be separated out in evaporation plate 32 with the form of crystal; Continuous operation for some time, when evaporation plate 32 intercrystalline thing is increased to expection thickness, cuts off the water inlet of concentrated solution in low temperature plate type evaporating apparatus, continue to pass into warm air and evaporate; After the residual moisture in low temperature plate type evaporating apparatus is vaporized completely, roots out crystalline powder material in evaporation plate with unloading plate, collecting crystalline powder material and carrying out recycling, or to make after solidification treatment subregion antiseepage landfill separately temporarily, exploitation treating after.The bottom of low temperature plate type evaporating apparatus arranges concentrated solution outlet as pod apertures, enables the liquid that do not evaporate or because the liquid of misoperation overflow is back to leachate equalization basin 22.
As shown in Figure 10, the top of low temperature plate type evaporating apparatus arranges hot air outlet 34 as gas port, hot air outlet 34 is by being communicated to photochemical catalytic oxidation odor removal 37 after steam-water separation tank on placed in series 35 and induced draft fan 36, also form a warm air circulation loop (systemic circulation) by pipeline communication in the bottom of low temperature plate type evaporating apparatus simultaneously, be with the warm air had surplus heat by circulation can be formed in low temperature plate type evaporating apparatus after the carbonated drink separating treatment of steam-water separation tank 35; Realize carbonated drink be separated after water of condensation can qualified discharge, unnecessary air is undertaken purifying rear qualified discharge by photochemical catalytic oxidation odor removal 37, photocatalytic oxidation device mainly utilizes uviolizing, under Titanium Dioxide effect, pollutent Catalytic Oxygen in hot exhaust gas is changed into inorganics, carbonic acid gas, by induced draft fan qualified discharge after water treatment.
The condenser 38 that low temperature plate type evaporating apparatus top is arranged makes saturated vapor air-flow meet cold rear formation water of condensation, water of condensation is guided in the condensation recycling cavity 39 of low temperature plate type evaporating apparatus along cone shape top, pass through condensate outlet again, finally be collected in phlegma liquid storage tank 40, phlegma liquid storage tank 40 comprises back pool 41 and outlet sump 42, partial condensation water is pushed the water-in flowing to condenser 38 by water pump by outlet sump 42 as condenser 38 cycling use of water, water after being heated in condenser 38 is drained to back pool 41 by recycling siphon principle, make it recycle, water of condensation unnecessary in phlegma liquid storage tank 40 can qualified discharge.
In the above-mentioned treatment process of the present embodiment, by changing the laminar flow dish structure in reverse osmosis treatment device, the distributing damper arranging many length alternate at its spaced surface forms many spoke-like flow-guiding channels, spoke-like diffusion can be formed when sewage wherein flows, effectively can reduce energy waste, mitigation system pressure, the capacity usage ratio of raising system, at utmost reduce film surface scale, the generation of pollution and concentration polarization phenomenon, the principle of reverse osmosis is utilized effectively to be separated with clear water by the pollutent in high-concentration sewage, significantly do not increasing investment, under not increasing the prerequisite of energy consumption, the clear water of the higher generation of sewage treating efficiency can be made to rise to 85% by 70%, corresponding concentrated solution output is reduced to 15% by 30%.Filter membrane component in the present embodiment all adopts standardized designs, is easy to demolition and maintenance, and single parts all allow independent replacing, replacement charge and working cost low; And reverse osmosis membrane all has high clearance to every pollutent, effluent quality is good, water conditioning.In addition, the present embodiment treatment process based on whole reverse osmosis treatment system floor space little, the construction period is short, level of automation is high, operates very flexible, can run continuously, also can intermittent operation, can also the series-parallel system of adjustment System, adapt to the requirement of water quality and quantity.
More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent process thereof.
Claims (9)
1., based on a process for treating high-concentration sewage for reverse osmosis, comprise the following steps:
A. pre-filtering process: utilize strainer to carry out pre-filtering process to pending high-concentration sewage;
B. preheat process: the sewage after pre-filtering process is sent into preheating apparatus and carries out thermal pretreatment;
C. reverse-osmosis treated: the sewage being preheated to suitable temp is sent into reverse osmosis treatment device and carries out reverse-osmosis treated, sewage after preheating flows into from the sewage inlet of reverse osmosis treatment device, multi-stage annular laminar flow dish and filter membrane component that union lever string establishes is provided with in reverse osmosis treatment device, and between adjacent two layers flow table, a filter membrane component is set, form tubular layer flow table assembly at putamina inner chamber after multilayer layer flow table superposes mutually, laminar flow dish assembly be provided with a vertical feed pathway be communicated with described sewage inlet between putamina inwall, the upper end of laminar flow dish assembly is fixed in the joint flange of reverse osmosis treatment device, the end flange spaced apart formation bottom liquid inlet passage of lower end and reverse osmosis treatment device, and the sewage that sewage inlet is flowed into enters into bottom liquid inlet passage by vertical feed pathway, each laminar flow dish is circumferentially evenly equipped with multiple long strip shape tap hole sewage laminar flow channel be communicated with near its central hole, by the one-level sewage laminar flow channel that the long strip shape tap hole offered makes the sewage in bottom liquid inlet passage enter into be formed between bottom layer flow table and filter membrane component, and then by many spoke-like flow-guiding channels that laminar flow panel surface is arranged, sewage is spread along bottom layer flow table to surrounding, when effluent stream is to bottom layer flow table edge, reverse by the space between bottom layer flow table and filter membrane component being gushed and carrying out 180 °, then the opposite side of one-level sewage laminar flow channel is entered into, in the opposite side of sewage laminar flow channel, sewage converges to central hole by surrounding, then the long strip shape tap hole arranged by upper level laminar flow disk center is upwards reversed and enters into B-grade sewage laminar flow channel, so move in circles, sewage is formed radial in laminar flow dish assembly, and S shape path from lower to upper, concentrated solution relief outlet finally by reverse osmosis treatment device is discharged,
In the flow process of sewage, the water purification composition contained in sewage is leached by the filter membrane component in every one-level sewage laminar flow channel, the outward flange of described filter membrane component closes, preglabellar field opening, water purification composition is by the reverse osmosis membrane through filter membrane component, and be delivered to the permeate passage of filter membrane component preglabellar field opening in communication by the thread support in filter membrane component middle layer, and finally export discharge by permeate;
Many the spoke-like flow-guiding channels that described laminar flow panel surface is arranged outwards disperse along the radiation direction of described long strip shape tap hole, by arranging a distributing damper near the outer peripheral position of laminar flow dish in spoke-like flow-guiding channel, make the sewage poured in from described long strip shape tap hole in the process that surrounding spreads, impact described distributing damper and form turbulent flow, described distributing damper is 1/4 ~ 1/2 of laminar flow dish radius length along the length of laminar flow dish radial direction.
2. the process for treating high-concentration sewage based on reverse osmosis according to claim 1, it is characterized in that: described pre-filtering process installs lift pump in sewage equalizing tank, pending high-concentration sewage is entered into strainer by lift pump macrobead thing and contaminant filter are fallen, ensure that dirty impurities in water is less, the sewage after filtration by Cemented filling in preheating apparatus.
3. the process for treating high-concentration sewage based on reverse osmosis according to claim 1 and 2, it is characterized in that: described preheat process utilizes preheating apparatus by heat-transfer medium preheating, heat-transfer medium after preheating transfers heat to the sewage in sewage preheating pond at heating pipe line internal recycle, and by the temperature regulator in preheating apparatus, the temperature of sewage in sewage preheating pond is controlled at 25 DEG C ~ 50 DEG C, and then by Cemented filling to the sewage inlet of reverse osmosis unit.
4. the process for treating high-concentration sewage based on reverse osmosis according to claim 1 and 2, it is characterized in that: the concentrated solution of discharging from the concentrated solution relief outlet of reverse osmosis treatment device processes through low-temperature evaporation treatment process, and this low-temperature evaporation treatment process comprises the following steps:
Utilize preheating of air assembly to carry out thermal pretreatment to air, the warm air after preheating is sent into the hot-air inlets end of a low temperature plate type evaporating apparatus;
Utilize sewage preheating assembly to carry out thermal pretreatment to treatment sewage, the sewage after preheating is sent into the wastewater inlet end of described low temperature plate type evaporating apparatus;
Described low temperature plate type evaporating apparatus is multi-layer plate-type structure, and be laminated primarily of multi-layer evaporation plate, make the concentrated solution entered in low temperature plate type evaporating apparatus on multi-layer evaporation plate, form successive layers stream-like liquid film from top to bottom by the flow control component in sewage preheating assembly, the warm air entered in low temperature plate type evaporating apparatus is made to form continuous upstream from bottom to top between multi-layer evaporation plate by preheating of air assembly, in low temperature plate type evaporating apparatus, make continuous upstream and successive layers stream-like liquid film carry out counter current contact, in counter current contact process, continuous upstream makes the moisture in successive layers stream-like liquid film constantly evaporate, continuous upstream finally forms saturated vapor steam flow and arrives the top area of low temperature plate type evaporating apparatus after multi-layer evaporation plate, its hot air outlet arranged via low temperature plate type evaporating apparatus top is discharged, successive layers stream-like liquid film, after fully evaporating, is separated out with crystalline form, the concentrated solution do not evaporated is guided to the bottom of low temperature plate type evaporating apparatus in evaporation plate, and the concentrated solution relief outlet it arranged bottom low temperature plate type evaporating apparatus is discharged.
5. the process for treating high-concentration sewage based on reverse osmosis according to claim 4, it is characterized in that: the top described wastewater inlet end being arranged on multi-layer evaporation plate, one end of every one deck evaporation plate in multi-layer evaporation plate is fixed, the other end overflow, and the location arrangements of the inboardend of adjacent two layers evaporation plate and effluent head is contrary, by the vibrational power flow of multi-layer evaporation plate by successive layers stream-like liquid film with the downward water conservancy diversion of S shape mode; One over-pass is set at the effluent head of every layer of evaporation plate, by the height of overflow weir that the height of controlling water kick baffle plate or over-pass are offered, the thickness of liquid film of successive layers stream-like liquid film in every one deck evaporation plate is successively decreased from top to down step by step; When successive layers stream-like liquid film is to the evaporation plate of the lowest layer, its thickness of liquid film controls be limited just to evaporate.
6. the process for treating high-concentration sewage based on reverse osmosis according to claim 4, it is characterized in that: the lower surface of one deck evaporation plate every in described multi-layer evaporation plate is arranged to lenticular dentation or wavelike structure, described continuous upstream is made to form local turbulence turbulent flow at the gas channel between adjacent two layers evaporation plate by regulating air flow controller, and make warm air above the liquid film of evaporation plate, form multiple Scroll-tupe partial circulating along gas channel direction, warm air and successive layers stream-like liquid film are contacted repeated multiple timesly.
Described multi-layer evaporation plate is arranged to drawer type composite module structure, each drawer be one can the composite module of free assembly and disassembly, each drawer is made up of at least one deck evaporation plate, and multiple drawer superposes the agent structure forming described multi-layer evaporation plate up and down; By increasing drawer quantity between adjacent two layers evaporation plate, the length of successive layers stream-like liquid film is increased, and then extend the evaporation time of successive layers stream-like liquid film in low temperature plate type evaporating apparatus; Or by reducing drawer quantity between multi-layer evaporation plate, the length of successive layers stream-like liquid film is reduced, and then shorten the evaporation time of successive layers stream-like liquid film in low temperature plate type evaporating apparatus.
7. the process for treating high-concentration sewage based on reverse osmosis according to claim 4, it is characterized in that: the cavity volume in described low temperature plate type evaporating apparatus is separated into evaporation cavity and condensation recycling cavity, and evaporation cavity is located at middle part, condensation recycling cavity is located at the periphery of evaporation cavity, at low temperature plate type evaporating apparatus top, one condenser is set, the saturated vapor steam flow that continuous upstream is formed after multi-layer evaporation plate condenses at low temperature plate type evaporating apparatus top, by the internal surface at low temperature plate type evaporating apparatus top is arranged to coniform, the phlegma of formation is guided to described condensation recycling cavity.
8. the process for treating high-concentration sewage based on reverse osmosis according to claim 7, it is characterized in that: offer condensate outlet in the bottom of described condensation recycling cavity, by transport pipe, the water of condensation of condensate outlet is delivered to a phlegma liquid storage tank, described phlegma liquid storage tank is formed primarily of the outlet sump two portions after back pool and backwater cooling, water of condensation is first caused back pool, water to be condensed is transferred to outlet sump after lowering the temperature in back pool, water of condensation after cooling is caused the water-in of described condenser by outlet sump again by pipeline, described condenser is water cooled condenser, when passing through its water outlet after the water in condenser heats up again by condensing hot air furnace to described back pool, recycle like this.
9. the process for treating high-concentration sewage based on reverse osmosis according to claim 4, it is characterized in that: the hot air outlet and that described low temperature plate type evaporating apparatus top is arranged reclaims assembly and is communicated with, the warm air of discharging from hot air outlet is first caused a steam-water separation tank, steam-water separation tank is utilized to carry out carbonated drink separating treatment to being with the warm air had surplus heat, the water of condensation formed after carbonated drink is separated can qualified discharge, warm air after separation continues through the bottom formation circulation of Cemented filling to low temperature plate type evaporating apparatus, controlled by the airshed of the air flow controller in preheating of air assembly to low temperature plate type evaporating apparatus internal recycle, unnecessary air is undertaken purifying rear qualified discharge by photochemical catalytic oxidation odor removal.
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| CN107051209B (en) * | 2017-03-30 | 2022-10-25 | 湖州鼎泰软片膜科技有限公司 | Small square film component |
| CN110294510A (en) * | 2019-07-11 | 2019-10-01 | 南京理工大学 | A kind of water treatment facilities with detachable light catalytic module |
| CN110818001A (en) * | 2019-10-29 | 2020-02-21 | 江苏海澄水工机械有限公司 | Evaporation chamber for low-temperature high-concentration sewage treatment |
| CN111453867A (en) * | 2020-04-14 | 2020-07-28 | 梁国莉 | Multistage filter device for municipal sewage treatment |
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