CN203820489U - Low-temperature evaporation treatment device for high-concentration wastewater - Google Patents

Low-temperature evaporation treatment device for high-concentration wastewater Download PDF

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Publication number
CN203820489U
CN203820489U CN201420089957.3U CN201420089957U CN203820489U CN 203820489 U CN203820489 U CN 203820489U CN 201420089957 U CN201420089957 U CN 201420089957U CN 203820489 U CN203820489 U CN 203820489U
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China
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evaporation
low
sewage
assembly
low temperature
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CN201420089957.3U
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高青松
舒淼
曾露
刘阳
彭胜
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Changsha Well-Point Environment Protection Science & Technology Co Ltd
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Changsha Well-Point Environment Protection Science & Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

The utility model discloses a low-temperature evaporation treatment device for high-concentration wastewater. The low-temperature evaporation treatment device comprises a wastewater preheating assembly, an air preheating assembly, a low-temperature plate-type evaporation device and a recovery assembly, wherein the wastewater preheating assembly and the air preheating assembly are respectively communicated to the wastewater inlet end and hot air inlet end of the low-temperature plate-type evaporation device; the low-temperature plate-type evaporation device is mainly formed by stacking a plurality of layers of evaporation plates, wastewater entering the low-temperature plate-type evaporation device can be formed into a continuous laminar flow shaped liquid membrane from top to bottom through a flow control part, hot air entering the low-temperature plate-type evaporation device can be formed into continuous upflow from bottom to top through the air preheating assembly, the continuous upflow is in countercurrent contact with the continuous laminar flow shaped liquid membrane, the top of the low-temperature plate-type evaporation device is provided with a hot air outlet communicated with the recovery assembly, and the bottom of the low-temperature plate-type evaporation device is provided with a wastewater outlet. The treatment device disclosed by the utility model is low in investment, good in treatment effect, convenient to maintain and operate, low in energy consumption and environment-friendly.

Description

The treatment unit of low-temperature evaporation high-concentration sewage
Technical field
The utility model relates to a kind of water treating equipment, relates in particular to a kind for the treatment of facility that is specially adapted to the high-concentration sewages such as city domestic refuse percolation liquid.
Background technology
The Technology Ways of the main flow of China's consumer waste infiltration liquid processing at present mainly contains two kinds, i.e. disc tube reverse osmosis (dt-ro) (DTRO) technology and " anaerobism+aerobic+MBR+NF/RO " combination technique.The core of these two kinds of technology is film processing, and the concentrated solution producing after film is processed is a kind of high density pollution thing, and its output is approximately processes 30% of percolate total amount.The pollutent of concentrated solution is not only dense, and complicated component is difficult to disposal, a current or world-class difficult problem.If recharged to refuse landfill circular treatment, there is certain effect at the initial stage, but long-term accumulation can cause the enrichment of COD and salinity, makes the replacement frequency fast rise of ultra-filtration membrane, thereby significantly increases processing cost; Processing if be transferred to city domestic sewage treatment plant, is a kind of way of transferring the pollution, and it is actual is by discharge after the dilution of high density pollution thing.
The intractability of percolate is far beyond existing technical capacity, and qualified discharge or in line phenomenon do not exist in various places to some extent.Sample survey shows, the garbage sanitary filling field less than 20% that really can discharge according to (GB16889-2008) standard stably reaching standard, and some domestic rubbish disposal treatments become deals with " doing something for the occasion " facility that higher environmental protection departments checks; Percolate concentrated solution causes severe contamination to underground water, soil, river course, and directly threatens drinking water safety.
Therefore, find that a kind for the treatment of effect is good, reduced investment, operation is convenient, energy consumption is low, running cost is low concentrated solution treatment unit, for solving technology of garbage disposal bottleneck, protection of the environment, reduce discharge of poisonous waste, seem particularly urgent.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, provide a kind of technological process simple, drop into little, treatment effect good, safeguard that operation is convenient, energy consumption is low, environmental protection, can realize the treatment unit of the low-temperature evaporation high-concentration sewage of pollutent " zero " discharge.
For solving the problems of the technologies described above, the technical scheme the utility model proposes is that a kind of low-temperature evaporation high-concentration sewage (can be used for treating refuse percolate concentrated solution and similar high-concentration industrial-water etc., for example contain mine wastewater and the refinery effluent of heavy metal) treatment unit, described treatment unit comprises sewage preheating assembly, preheating of air assembly, low temperature plate type evaporating apparatus and recovery assembly, and described sewage preheating assembly, preheating of air assembly are communicated to respectively sewage entrance end and the hot-air inlets end of low temperature plate type evaporating apparatus, described low temperature plate type evaporating apparatus is multi-layer plate-type structure, and be mainly laminated by multi-layer evaporation plate, the sewage that makes to enter in low temperature plate type evaporating apparatus by the flow control component in sewage preheating assembly forms continuous laminar flow shape liquid film from top to bottom on multi-layer evaporation plate, the warm air that makes to enter in low temperature plate type evaporating apparatus by preheating of air assembly forms continuous upstream from bottom to top between multi-layer evaporation plate, described continuous upstream and continuous laminar flow shape liquid film counter current contact, described low temperature plate type evaporating apparatus top is provided with and the hot air outlet that reclaims assembly and be communicated with, described low temperature plate type evaporating apparatus bottom is provided with sewage outlet.
In the treatment unit of above-mentioned low-temperature evaporation high-concentration sewage, preferred, described multi-layer evaporation plate is arranged to impel continuous laminar flow shape liquid film with the descending guiding decoration form of S shape mode; Described continuous upstream rises and continuous laminar flow shape liquid film counter current contact in S shape mode.
In the treatment unit of above-mentioned low-temperature evaporation high-concentration sewage, preferred, in described multi-layer evaporation plate, the lower surface of every one deck evaporation plate is arranged to impel continuous upstream to form lenticular dentation or the wavy structure of local turbulence turbulent flow.
In the treatment unit of above-mentioned low-temperature evaporation high-concentration sewage, preferably, in described multi-layer evaporation plate, one end of every one deck evaporation plate is inboardend, the other end is effluent head, described effluent head is provided with an over-pass, the height of the overflow weir of offering on the height by controlling water kick baffle plate or over-pass, makes the thickness of liquid film of continuous laminar flow shape liquid film in every one deck evaporation plate present the form of successively decreasing step by step from top to down.
In the treatment unit of above-mentioned low-temperature evaporation high-concentration sewage, preferably, described multi-layer evaporation plate is arranged to drawer type composite module structure, each drawer be one can free assembly and disassembly composite module, each drawer is made up of one deck evaporation plate at least, and multiple drawers superpose up and down and form the agent structure of described multi-layer evaporation plate.
In the treatment unit of above-mentioned low-temperature evaporation 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, and described sewage entrance end is directly communicated to the top of evaporation cavity; Described low temperature plate type evaporating apparatus top is provided with phlegma is guided to the condenser in condensation recycling cavity.
In the treatment unit of above-mentioned low-temperature evaporation high-concentration sewage, preferably, the internal surface at described low temperature plate type evaporating apparatus top is arranged to coniform, described condenser is water cooled condenser, this water cooled condenser is located between cone shape internal surface and the outer wall of low temperature plate type evaporating apparatus, the bottom of condensation recycling cavity offers condensate outlet, and condensate outlet is by pipeline communication to phlegma liquid storage tank.Preferred, described phlegma liquid storage tank is mainly made up of the outlet sump two portions after back pool and backwater cooling, described outlet sump is the water-in to described water cooled condenser by pipeline communication, and the water outlet of water cooled condenser and condensate outlet are all by extremely aforementioned back pool of pipeline communication.
In the treatment unit of above-mentioned low-temperature evaporation high-concentration sewage, preferred, described sewage preheating assembly and preheating of air assembly share a set of thermal source plenum system, and described thermal source plenum system comprises heating unit and heating pipe line, fills heat-transfer medium in heating pipe line; Described sewage preheating assembly comprises sewage preheating pond, heating pipe line extends to heat supply in sewage preheating pond, described heating pipe line also extends to a Heating pool, described preheating of air assembly comprises gas blower, air delivery pipe road and air flow controller, and air delivery pipe road extends in described Heating pool to preheating of air.
In the treatment unit of above-mentioned low-temperature evaporation high-concentration sewage, preferably, described recovery assembly comprises steam-water separation tank, induced draft fan and exhaust gas cleaner (preferred light catalytic oxidation deodorizing device), and described hot air outlet is connected after upper steam-water separation tank and induced draft fan and is communicated to exhaust gas cleaner by pipeline, and described recovery assembly is communicated with formation and circulates with low temperature plate type evaporating apparatus.
Compared with prior art, the utility model has the advantage of:
1. in treatment unit of the present utility model, mainly utilized 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 of low temperature plate type evaporating apparatus bottom constantly increase in a steady stream; By reclaiming the connection of assembly, can make warm air at low temperature plate type evaporating apparatus and reclaim between assembly to form closed loop again, move in circles, thereby efficiently utilize air waste heat, realize the moisture in efficient cryogenic evaporation sewage.
2. treatment unit energy-conserving and environment-protective of the present utility model, by utilizing " seawater is evaporated brine " principle, can under low temperature (40 DEG C~60 DEG C) state, evaporate sewage, 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, meet national grade one discharge standard, do not need again to process and can discharge.
3. treatment unit vaporization efficiency of the present utility model is high, by utilize lenticular dentation or the wavy structure of drawer type evaporation plate bottom in preferred technical scheme, upstream is met obstructions and form local turbulence formula partial circulating, force upstream and liquid film multiple-contact, significantly improve the vaporization efficiency under low-temperature condition.
4. treatment unit of the present utility model can be designed to open unitized construction, by adopting modular designs, make sewage preheating assembly, preheating of air assembly, low temperature plate type evaporating apparatus and recovery assembly etc. that open interface is all set, not only be convenient to the assembly and connection between each assembly module, and be conducive to the independent upgrading between each assembly module.
5. the low temperature plate type evaporating apparatus in the utility model treatment unit can further be designed to preferred composite module structure, be that single low temperature plate type evaporating apparatus can be 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 to parallel connection in addition, carry out independently respectively sewage disposal simultaneously, treatment capacity can increase sharply after the parallel connection of multiple low temperature plate type evaporating apparatus, raise the efficiency, and when a low temperature plate type evaporating apparatus is wherein in the time carrying out the cleaning of crystallisate, other low temperature plate type evaporating apparatus can move simultaneously, to ensure the continuity of sewage disposal, even if breaking down, individual module do not affect the operation of whole treatment unit yet.
6. the thermal source of the use such as sewage preheating assembly, preheating of air assembly in the utility model treatment unit all can adopt clean energy, it is mainly for example the methane energy that utilizes household refuse landfill sites self to produce, application cost is low, and can reduce greenhouse gases and directly discharge.If the utility model treatment unit, for Industrial Wastewater Treatment field, can utilize sun power or air can serve as main energy sources.Biogas energy or sun power, air can all belong to clean energy field, meet national policy guiding, and are conducive to environment protection.
7. the process treatment process of the utility model treatment unit is simple, cost of investment is low, and energy consumption is low, safeguards that operation is simple and convenient, better economic benefit, and the sewage final product of processing is approximately 97% clear water and approximately 3% crystallisate, can realize pollutent " zero " discharge.
Brief description of the drawings
Fig. 1 is the structural representation for the treatment of unit in the utility model embodiment.
Fig. 2 is the structural representation (having omitted part evaporation plate) of low temperature plate type evaporating apparatus in the utility model embodiment.
Fig. 3 is the air-flow systemic circulation schematic diagram of low temperature plate type evaporating apparatus in the utility model embodiment.
Fig. 4 is the evaporation plate partial enlarged drawing (air-flow partial circulating schematic diagram) of low temperature plate type evaporating apparatus in the utility model embodiment.
Fig. 5 is the partial enlarged drawing (side-looking) of the over-pass of low temperature plate type evaporating apparatus in the utility model embodiment.
Fig. 6 is process principle figure when treatment unit is runed in the utility model embodiment.
Marginal data:
1, low temperature plate type evaporating apparatus; 11, concentrated solution entrance end; 12, hot-air inlets end; 13, evaporation plate; 131, inboardend; 132, effluent head; 133, overflow weir; 134, over-pass; 135, lenticular dentation; 14, hot air outlet; 15, concentrated solution outlet; 16, evaporation cavity; 17, condensation recycling cavity; 18, condenser; 2, heating unit; 21, heating pipe line; 3, concentrated solution preheating pond; 31, concentrated solution transferpump; 32, concentrated solution transport pipe; 33, flow control component; 4, Heating pool; 41, gas blower; 42, air delivery pipe road; 43, air flow controller; 44, air heating conduit; 5, phlegma liquid storage tank; 51, back pool; 52, outlet sump; 53, condenser moisturizing pipeline; 6, steam-water separation tank; 61, induced draft fan; 62, photochemical catalytic oxidation odor removal; 63, warm air diverting valve.
Embodiment
For the ease of understanding the utility model, below in connection with Figure of description and preferred embodiment, the utility model is done more comprehensively, described meticulously, but protection domain of the present utility model is not limited to following specific embodiment.
It should be noted that, in the time that a certain element is described on " be fixed on or be connected in " another element, it can be directly to fix or be connected on another element, can be also indirectly fixed or be connected on another element by other intermediate connectors.
Unless otherwise defined, all technical terms of hereinafter using are identical with the implication that those skilled in the art understand conventionally.Technical term used herein, just in order to describe the object of specific embodiment, is not to be intended to limit protection domain of the present utility model.
Embodiment:
A kind for the treatment of unit of low-temperature evaporation high-concentration sewage of the present utility model as shown in Figure 1, this treatment unit comprises concentrated solution preheating assembly, preheating of air assembly, low temperature plate type evaporating apparatus 1 and reclaims assembly, concentrated solution preheating assembly, preheating of air assembly are communicated to respectively concentrated solution entrance end 11 and the hot-air inlets end 12 of low temperature plate type evaporating apparatus 1, reclaim assembly and are communicated with the bottom of low temperature plate type evaporating apparatus 1 and are formed circulation by a warm air diverting valve 63 and shunt conduit.
As shown in Figure 1, concentrated solution preheating assembly in the present embodiment and preheating of air assembly share a set of thermal source plenum system, the thermal source plenum system of the present embodiment comprises heating unit 2 and heating pipe line 21, in heating pipe line 21, fill heat-transfer medium, heat-transfer medium can adopt clear water or heat conduction wet goods, the general stainless steel pipes that adopts of heating pipe line 21; Heating unit 2 in the present embodiment is a biogas burning boiler, this biogas burning boiler can directly be collected the biogas of household refuse landfill sites, if treatment unit of the present utility model is for the treatment of high-concentration industrial-water, heating unit 2 can adopt solar heat collector or air energy heating unit.
Concentrated solution preheating assembly in the present embodiment comprises concentrated solution preheating pond 3, heating pipe line 21 extends to heat supply in concentrated solution preheating pond 3, concentrated solution preheating pond 3 is communicated to the concentrated solution entrance end 11 of low temperature plate type evaporating apparatus 1 through concentrated solution transferpump 31 and concentrated solution transport pipe 32, be also provided with such as flow pump of flow control component 33(on concentrated solution transport pipe 32).Heating pipe line 21 also extends to a Heating pool 4, preheating of air assembly comprises gas blower 41 and air delivery pipe road 42, air delivery pipe road 42 leading portions are provided with and extend to the air heating conduit 44 to preheating of air in Heating pool 4, air delivery pipe road 42 back segments are provided with air flow controller 43, air delivery pipe road 42 is finally communicated to the hot-air inlets end 12 of low temperature plate type evaporating apparatus 1, and hot-air inlets end 12 places are provided with nozzle.
As shown in Figure 2 to 4, the low temperature plate type evaporating apparatus 1 in the present embodiment is multi-layer plate-type structure, and material of main part all adopts stainless steel to make, and is mainly laminated by multi-layer evaporation plate 13.The concentrated solution that makes to enter in low temperature plate type evaporating apparatus 1 by the flow control component 33 in concentrated solution preheating assembly forms continuous laminar flow shape liquid film from top to bottom on multi-layer evaporation plate 13, the warm air that makes to enter in low temperature plate type evaporating apparatus 1 by preheating of air assembly forms continuous upstream from bottom to top 13 of multi-layer evaporation plates, and upstream and continuous laminar flow shape liquid film counter current contact are to realize the low-temperature evaporation of moisture in concentrated solution continuously.
In the low temperature plate type evaporating apparatus 1 of the present embodiment, multi-layer evaporation plate 13 is arranged to drawer type composite module structure, each drawer be one can free assembly and disassembly composite module, in the present embodiment, each drawer is made up of one deck evaporation plate 13, and multiple drawers superpose up and down and form the agent structure of multi-layer evaporation plate 13.As shown in Figure 1, realizing part is the evaporation plate 13 of actual setting, dotted portion represents the evaporation plate that can increase by drawer type composite module structure, thus, can pass through to regulate the quantity of drawer quantity regulating evaporation plate 13, and then regulate the time of continuous laminar flow shape liquid film and continuous upstream counter current contact.
As shown in Figure 5, in the low temperature plate type evaporating apparatus 1 of the present embodiment, one end of every one deck evaporation plate 13 is inboardend 131, the other end is effluent head 132, effluent head 132 is provided with an over-pass 134, the height of the overflow weir 133 of offering on the height by controlling water kick baffle plate 134 or over-pass 134, the thickness of adjustable corresponding evaporation plate 13 top continuous laminar flow shape liquid films, makes the thickness of liquid film of continuous laminar flow shape liquid film in every one deck evaporation plate 13 present the form of successively decreasing step by step from top to down; Thickness of liquid film to the drawer type evaporation plate 13 of the lowest layer is limited can evaporate formation xln completely.
In the low temperature plate type evaporating apparatus 1 of the present embodiment, multi-layer evaporation plate 13 is arranged to impel continuous laminar flow shape liquid film with the descending guiding decoration form of S shape mode; Be that the inboardend 131 of neighbouring two-layer evaporation plate 13 and the position of effluent head 132 alternately change, under this structure arranges, upstream rises in S shape mode and keeps counter current contact with descending continuous laminar flow shape liquid film continuously.
As shown in Figure 4, in the low temperature plate type evaporating apparatus 1 of the present embodiment, in multi-layer evaporation plate, the lower surface of every one deck evaporation plate 13 is arranged to impel continuous upstream to form lenticular dentation 135(or the wavy structure of local turbulence turbulent flow).
Low temperature plate type evaporating apparatus 1 top of the present embodiment is provided with and the hot air outlet 14 that reclaims assembly and be communicated with, and the bottom of low temperature plate type evaporating apparatus 1 is provided with concentrated solution outlet 15.Cavity volume in low temperature plate type evaporating apparatus 1 is separated into evaporation cavity 16 and condensation recycling cavity 17, and evaporation cavity 16 is located at the middle part of low temperature plate type evaporating apparatus 1, condensation recycling cavity 17 is located at the periphery of evaporation cavity 16, and concentrated solution entrance end 11 is directly communicated to the top of evaporation cavity 16.
The top of the low temperature plate type evaporating apparatus 1 of the present embodiment is provided with phlegma is guided to the condenser 18 in condensation recycling cavity 17.The internal surface at low temperature plate type evaporating apparatus 1 top is arranged to coniform, condenser 18 is water cooled condenser, this water cooled condenser is located between cone shape internal surface and the outer wall of low temperature plate type evaporating apparatus 1, the bottom of condensation recycling cavity 17 offers condensate outlet, condensate outlet is by pipeline communication to phlegma liquid storage tank 5, phlegma liquid storage tank 5 comprises back pool 51 and outlet sump 52, and the outlet sump 52 of phlegma liquid storage tank 5 is separately communicated to the water-in of condenser 18 by condenser moisturizing pipeline 53.
In the treatment unit of the concentrated liquid of low-temperature evaporation percolate of the present embodiment, reclaim assembly and comprise steam-water separation tank 6, induced draft fan 61 and photochemical catalytic oxidation odor removal 62, and hot air outlet 14 connect to go up to be communicated to after steam-water separation tank 6 and induced draft fan 61 by pipeline in photochemical catalytic oxidation odor removal 62(, establish ultraviolet lamp tube and catalyzer web plate).The bottom of steam-water separation tank 6 is provided with condensate drain outlet.
In the treatment unit of the concentrated liquid of the low-temperature evaporation percolate of the present embodiment, be provided with multiple compatibility interfaces, so as according to day treatment scale increase and decrease low temperature plate type evaporating apparatus 1 quantity; A kind of is preferred embodiment the low temperature plate type evaporating apparatus 1 that two groups of parallel connections are set, so that when one group of low temperature plate type evaporating apparatus 1 overhauls or clears up xln therein, another group low temperature plate type evaporating apparatus 1 can work on, to ensure the continuous processing of concentrated solution.
The principle of work of the treatment unit of the concentrated liquid of low-temperature evaporation percolate of the present embodiment and process as shown in Figure 6, mainly comprise the following steps:
(1) biogas of collection refuse landfill, utilizing heating unit 2(is biogas burning boiler) preheating heat-transfer medium is (if this treatment unit is for high-concentration industrial-water process field, its main thermal 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 21 internal recycle, heating pipe line 21 transfers heat to percolate concentrated solution in concentrated solution preheating pond 3, percolate concentrated solution is heated to 50 DEG C of left and right (preferably 40 DEG C~60 DEG C), and the concentrated solution after being preheated is sent into the concentrated solution entrance end 11 of low temperature plate type evaporating apparatus 1 by flow control component 33.
(2) preheating of air assembly comes into operation simultaneously, the thermal source of preheating of air assembly is taken from the Heating pool 2 after heating unit 2 preheatings equally, outside air first enters air delivery pipe road 42 through gas blower 41, air delivery pipe road 42 leading portions are provided with and extend to the air heating conduit 44 to preheating of air in Heating pool 4, warm air (30 DEG C of left and right) after 44 preheatings of air heating conduit is admitted to the hot-air inlets end 12 of low temperature plate type evaporating apparatus 1 again by an induced draft fan, hot-air inlets end 12 is located at the bottom section (being Tu1ZhongⅠ district) of low temperature plate type evaporating apparatus 1.
(3) low temperature plate type evaporating apparatus 1 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 13, form continuous laminar flow shape liquid film from top to bottom by flow control component 33, due to the special construction design of multi-layer evaporation plate 13 in the present embodiment treatment unit, make continuous laminar flow shape liquid film descending in serpentine mode, and the thickness of liquid film reduces from top to bottom step by step, to the thickness of liquid film of the drawer type evaporation plate 13 of the lowest layer just to evaporate and to be limited; Meanwhile, the warm air entering from hot-air inlets end 12 slowly brushes the each layer of laminar flow shape liquid film evaporation plate 13 from bottom to top in low temperature plate type evaporating apparatus 1; Due to the special construction design (lenticular dentation) of evaporation plate 13 lower surfaces, upstream can be met obstructions when through each layer of evaporation plate 13 and form local turbulence turbulent flow (referring to Fig. 4), force warm air to contact repeated multiple timesly with liquid film, warm air can form multiple Scroll-tupe partial circulatings above evaporation plate 13 liquid films, and upstream final formation saturated vapor steam flow after multi-layer evaporation plate 13 arrives the top area (Ji Tu1Ⅱ district) of low temperature plate type evaporating apparatus 1 continuously.
(4) low temperature plate type evaporating apparatus 1 is further simulated " typhoon " effect, be equiped with a condenser 18 at its top, condenser 18 makes the saturated steam that arrives device inner top region (II district) meet condensation knot, release of heat in the process of condensing, and then form negative pressure in low temperature plate type evaporating apparatus 1 top area, make this region produce a kind of upwards pulling force of ascension of warm air that impels, constantly rise with the warm air that drives low temperature plate type evaporating apparatus 1 bottom.Under slowly the brushing of warm air, the moisture of low temperature plate type evaporating apparatus 1 interior 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 with the form of crystal in evaporation plate 13; Operation for some time continuously, in the time that evaporation plate 13 intercrystalline things are increased to expection thickness, cut off the water inlet of concentrated solution in low temperature plate type evaporating apparatus 1, continue to pass into warm air and evaporate; After the residual moisture in low temperature plate type evaporating apparatus 1 is evaporated completely, root out the crystalline powder material in evaporation plate with unloading plate, collect crystalline powder material and carry out recycling, or do temporarily after solidification treatment subregion antiseepage landfill separately, exploitation treating after.The bottom of low temperature plate type evaporating apparatus 1 arranges concentrated solution outlet 15 as pod apertures, makes the liquid not evaporating or can be back to leachate equalization basin because of the liquid of misoperation overflow.
(5) top of low temperature plate type evaporating apparatus 1 arranges hot air outlet 14 as gas port, hot air outlet 14 is connected after upper steam-water separation tank 6 and induced draft fan 61 and is communicated to photochemical catalytic oxidation odor removal 62 by pipeline, also a warm air circulation loop (systemic circulation) is formed on the bottom by pipeline communication and low temperature plate type evaporating apparatus 1 simultaneously, and the warm air that band has surplus heat can circulate in the interior formation of low temperature plate type evaporating apparatus 1 after by the carbonated drink separating treatment of steam-water separation tank 6; The water of condensation of realizing after carbonated drink separates can qualified discharge; Realizing after the natural circulation (systemic circulation) of low temperature plate type evaporating apparatus 1 interior air-flow, the work of can optionally reduce or turn off the blast machine 41 and induced draft fan 61, to reduce energy consumption; Airshed by air flow controller 43 in can balance systemic circulation pipeline, unnecessary air purifies rear qualified discharge by photochemical catalytic oxidation odor removal 62, photocatalytic oxidation device is mainly utilized uviolizing, under Titanium Dioxide effect, pollutent Catalytic Oxygen in hot exhaust gas is changed into inorganics, carbonic acid gas, after water treatment, pass through induced draft fan qualified discharge.
(6) condenser 18 that low temperature plate type evaporating apparatus 1 top arranges makes saturated vapor air-flow meet cold rear formation water of condensation, water of condensation is by the condensation recycling cavity 17 along cone shape overhead stream to low temperature plate type evaporating apparatus 1, pass through again condensate outlet, finally be collected in phlegma liquid storage tank 5, phlegma liquid storage tank 5 comprises back pool 51 and outlet sump 52, partial condensation water is pushed the water-in that flows to condenser 18 by water pump by outlet sump 52 as condenser 18 cycling use of waters, recycling siphon principle can be drained to back pool 51 by the water after being heated in condenser 18, make it recycle, water of condensation unnecessary in phlegma liquid storage tank 5 can qualified discharge.
Due to domestic refuse complicated component, the objectionable constituent of the concentrated liquid of percolate under different cities, Various Seasonal, the different landfill time limit, Different climate condition all there are differences, for guaranteeing water of condensation qualified discharge, in implementation process, want the composition of detection of dynamic concentrated solution, the minimum volatilization temperature of understanding objectionable constituent, raises or reduces the temperature in low temperature plate type evaporating apparatus 1 according to the minimum volatilization temperature of objectionable constituent.In general,, after the processing of above-mentioned the utility model treatment unit, the concentrated liquid of percolate finally becomes approximately 97% clear water and approximately 3% crystalline powder material.
While stating in design the area of multi-layer evaporation plate in treatment unit and overall floor height, we are to process 15 tons of concentrated solutions day as standard; Because the treatment unit in the present embodiment is provided with multiple compatibility interfaces, therefore we can increase and decrease according to the Sino-Japan treatment scale of reality the quantity of low temperature plate type evaporating apparatus 1; Such as, be that 30 ton per days calculate by the treatment scale of concentrated solution in the present embodiment, the low temperature plate type evaporating apparatus 1 that two groups of parallel connections are set can solve, also can ensure the continuity of concentrated solution processing simultaneously, when first set low temperature plate type evaporating apparatus moves after for some time continuously, cut off water inlet, continue to blast warm air, after remaining liq in evaporation board slot is evaporated completely, unload plate and root out crystallisate; In cutting off the water inlet of first set low temperature plate type evaporating apparatus, keep the water intaking valve of the second cover low temperature plate type evaporating apparatus to open, so cyclical operation, can keep continual operation.

Claims (10)

1. the treatment unit of a low-temperature evaporation high-concentration sewage, it is characterized in that: described treatment unit comprises sewage preheating assembly, preheating of air assembly, low temperature plate type evaporating apparatus and recovery assembly, and described sewage preheating assembly, preheating of air assembly are communicated to respectively sewage entrance end and the hot-air inlets end of low temperature plate type evaporating apparatus, described low temperature plate type evaporating apparatus is multi-layer plate-type structure, and be mainly laminated by multi-layer evaporation plate, the sewage that makes to enter in low temperature plate type evaporating apparatus by the flow control component in sewage preheating assembly forms continuous laminar flow shape liquid film from top to bottom on multi-layer evaporation plate, the warm air that makes to enter in low temperature plate type evaporating apparatus by preheating of air assembly forms continuous upstream from bottom to top between multi-layer evaporation plate, described continuous upstream and continuous laminar flow shape liquid film counter current contact, described low temperature plate type evaporating apparatus top is provided with and the hot air outlet that reclaims assembly and be communicated with, described low temperature plate type evaporating apparatus bottom is provided with sewage outlet.
2. the treatment unit of low-temperature evaporation high-concentration sewage according to claim 1, is characterized in that: described multi-layer evaporation plate is arranged to impel continuous laminar flow shape liquid film with the descending guiding decoration form of S shape mode; Described continuous upstream rises and continuous laminar flow shape liquid film counter current contact in S shape mode.
3. the treatment unit of low-temperature evaporation high-concentration sewage according to claim 2, is characterized in that: in described multi-layer evaporation plate, the lower surface of every one deck evaporation plate is arranged to impel continuous upstream to form lenticular dentation or the wavy structure of local turbulence turbulent flow.
4. according to the treatment unit of the low-temperature evaporation high-concentration sewage described in claim 1,2 or 3, it is characterized in that: in described multi-layer evaporation plate, one end of every one deck evaporation plate is inboardend, the other end is effluent head, described effluent head is provided with an over-pass, the height of the overflow weir of offering on the height by controlling water kick baffle plate or over-pass, makes the thickness of liquid film of continuous laminar flow shape liquid film in every one deck evaporation plate present the form of successively decreasing step by step from top to down.
5. the treatment unit of low-temperature evaporation high-concentration sewage according to claim 4, it is characterized in that: described multi-layer evaporation plate is arranged to drawer type composite module structure, each drawer be one can free assembly and disassembly composite module, each drawer is made up of one deck evaporation plate at least, and multiple drawers superpose up and down and form the agent structure of described multi-layer evaporation plate.
6. according to the treatment unit of the low-temperature evaporation high-concentration sewage described in claim 1,2 or 3, 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, and described sewage entrance end is directly communicated to the top of evaporation cavity; Described low temperature plate type evaporating apparatus top is provided with phlegma is guided to the condenser in condensation recycling cavity.
7. the treatment unit of low-temperature evaporation high-concentration sewage according to claim 6, it is characterized in that: the internal surface at described low temperature plate type evaporating apparatus top is arranged to coniform, described condenser is water cooled condenser, this water cooled condenser is located between cone shape internal surface and the outer wall of low temperature plate type evaporating apparatus, the bottom of condensation recycling cavity offers condensate outlet, and condensate outlet is by pipeline communication to phlegma liquid storage tank.
8. the treatment unit of low-temperature evaporation high-concentration sewage according to claim 7, it is characterized in that: described phlegma liquid storage tank is mainly made up of the outlet sump two portions after back pool and backwater cooling, described outlet sump is the water-in to described water cooled condenser by pipeline communication, and the water outlet of water cooled condenser and condensate outlet are all by extremely aforementioned back pool of pipeline communication.
9. according to the treatment unit of the low-temperature evaporation high-concentration sewage described in claim 1,2 or 3, it is characterized in that: described sewage preheating assembly and preheating of air assembly share a set of thermal source plenum system, described thermal source plenum system comprises heating unit and heating pipe line, fills heat-transfer medium in heating pipe line; Described sewage preheating assembly comprises sewage preheating pond, heating pipe line extends to heat supply in sewage preheating pond, described heating pipe line also extends to a Heating pool, described preheating of air assembly comprises gas blower, air delivery pipe road and air flow controller, and air delivery pipe road extends in described Heating pool to preheating of air.
10. according to the treatment unit of the low-temperature evaporation high-concentration sewage described in claim 1,2 or 3, it is characterized in that: described recovery assembly comprises steam-water separation tank, induced draft fan and exhaust gas cleaner, and described hot air outlet is connected after upper steam-water separation tank and induced draft fan and is communicated to exhaust gas cleaner by pipeline, and described recovery assembly is communicated with formation and circulates with the bottom of low temperature plate type evaporating apparatus by pipeline.
CN201420089957.3U 2014-02-28 2014-02-28 Low-temperature evaporation treatment device for high-concentration wastewater Withdrawn - After Issue CN203820489U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103848463A (en) * 2014-02-28 2014-06-11 长沙威保特环保科技有限公司 Treatment device of low-temperature evaporation high-concentration sewage
CN105645491A (en) * 2016-01-19 2016-06-08 北京科清环保科技有限公司 Water purification system and process
CN107117676A (en) * 2017-06-08 2017-09-01 江苏新奇环保有限公司 A kind of low temperature and high concentration sewage disposal vaporization chamber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103848463A (en) * 2014-02-28 2014-06-11 长沙威保特环保科技有限公司 Treatment device of low-temperature evaporation high-concentration sewage
CN105645491A (en) * 2016-01-19 2016-06-08 北京科清环保科技有限公司 Water purification system and process
CN107117676A (en) * 2017-06-08 2017-09-01 江苏新奇环保有限公司 A kind of low temperature and high concentration sewage disposal vaporization chamber

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