CN104399267A - Continuous steam recompression evaporation system using flash steam waves - Google Patents
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- 238000001704 evaporation Methods 0.000 title claims abstract description 31
- 230000008020 evaporation Effects 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- 238000007701 flash-distillation Methods 0.000 claims description 61
- 230000000694 effects Effects 0.000 claims description 40
- 230000009291 secondary effect Effects 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 23
- 238000007906 compression Methods 0.000 abstract description 7
- 230000006835 compression Effects 0.000 abstract description 6
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 239000012071 phase Substances 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009290 primary effect Effects 0.000 abstract 1
- 239000011550 stock solution Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010237 hybrid technique Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a continuous steam recompression evaporation system using flash steam waves, belongs to the technical field of hot-method evaporation. Specifically, a flash steam wave pressure booster is introduced, steam recompression is completed by using flash steam waves by using the pressure boosting characteristics of flash steam waves of saturated water with pressure, two combination systems of steam recompression by using flash steam waves and pressure boosting/steam thermal compression of the flash steam waves are achieved, tail-effect secondary steam is fed into a flash steam wave booster and is subjected to recompression, after the energy grade is increased, the tail-effect secondary steam is fed into a primary-effect evaporator to be used as a driving heat source, the generated secondary steam is separated in a gas-liquid separation module, and is further used as a lower-effect heat source for continuous evaporation, and a stock solution is pumped out of the device after being concentrated to be saturated in concentration in the evaporators. By adopting the continuous steam recompression evaporation system, the compression process that gas phase compression of steam is converted to liquid phase compression is achieved, the efficiency is remarkably improved, the difficulty that a steam compressor is hard to design and manufacture is solved, and the pressure boosting efficiency is relatively high when being compared with that of a steam ejector.
Description
Technical field
The present invention relates to a kind of flash distillation wave steam recompression continuous evaporation system, belong to hot method evaporation technique field.
Background technology
High-salt wastewater discharges arbitrarily and brings immense pressure to ecological environment, has caused government and street levels extensive concern, in the urgent need to the high-salt wastewater treatment technology of economical and efficient.In the large mainstream technology of current desalination three, reverse osmosis membrane (RO) method, good economy performance, but there is the problems such as fouling membrane, production capacity are little; The hot law technology energy consumptions such as conventional multistage flash distillation (MSF) and multiple-effect evaporation (MED) technology high (as triple effect MED consumes about 0.4 ton of live steam/ton waste water), economy is poor, and industry even thinks that hot law technology is not the developing direction of saline treatment technology.But there is the outstanding advantages of stable operation, salt clearance very high (can reach 98%-99%) in hot method process brine waste, and waste water salinity is higher, and advantage is more outstanding.
As the hot method treatment technology of one, thermodynamic steam recompression (TVR), adopts steam ejector to recompress indirect steam, can partly utilize indirect steam latent heat, improve capacity usage ratio.This technological merit is that equipment is simple, without tumbler, energy-saving effect is better than traditional multiple-effect evaporation MED technology.But maximum problem is, and injector charging efficiency is low, and indirect steam latent heat is not fully utilized, and energy-saving effect is not remarkable.
Adopt wave rotor charging efficiency based on UNSTEADY FLOW process higher than the charging efficiency of steady flow process, this technology, without the need to the parts such as piston or blade, just efficiently can complete the DIRECT ENERGY exchange between high and low pressure fluid by means of only the Shock-Motion produced.CN101290174 provides a kind of outer circulation dissipation type air wave machine principle structure, and such both ends open wave rotor structure can complete the energy exchange of high-low pressure fluid.If the Shock-Motion this structure being used for saturated liquid flash distillation generation carries out the recompression of indirect steam, just form the main thought of this invention.
Summary of the invention
In order to overcome problems of the prior art, the invention provides the machine-processed continuous evaporation system of a kind of flash distillation wave steam recompression evaporation, the shock wave that its object is to make full use of the generation of flash distillation wave heats and pressurized effect, improves energy utilization efficiency.
The technical solution used in the present invention is:
A kind of flash distillation wave steam recompression continuous evaporation system, it comprises a multi-effect evaporator, heavy liquor pump, condensate pump, thermal source heat exchanger, multi-effect evaporator is made up of first evaporator, several single-effect evaporators and last evaporator, it also comprises flash distillation wave pressure supercharger, booster pump and a vavuum pump, the bottom of adjacent each single-effect evaporator adopts communicating pipe to connect, and also adopts the circulating pump of each single-effect evaporator to connect liquid uniform device in this single-effect evaporator; Outlet connects the driving heat source entrance of flash distillation wave pressure supercharger for thermal source heat exchanger that is saturated or overheated aqueous water and regulates the first control valve of flash distillation wave turbocharger inlet temperature, the head that the pressurized outlet of flash distillation wave pressure supercharger connects in first evaporator imitates heat exchanger, and the upper space of last evaporator adopts pipeline to connect the low-pressure steam inlet of flash distillation wave pressure supercharger; Described first evaporator upper space connects the secondary effect heat exchanger in time single-effect evaporator by pipeline, by that analogy, prime time single-effect evaporator upper space connects the secondary effect heat exchanger in rear class time single-effect evaporator by pipeline, and final stage time single-effect evaporator upper space connects the end effect heat exchanger in last evaporator by pipeline; Stoste enters from the stoste import of the condenser being positioned at last evaporator upper space, enters in first evaporator through stoste pipe, and the bottom of last evaporator connects heavy liquor pump, is provided with solidifying water connects dish in the bottom of condenser; The upper space of described last evaporator adopts pipeline to connect vavuum pump through steam-water separator; In described each single-effect evaporator, the outlet of each effect heat exchanger connects with solidifying water the water inlet coiling and be jointly connected booster pump and condensate pump, and booster pump connects thermal source heat exchanger through regulating the second control valve of flash distillation wave booster inlet pressure.
The upper space of described last evaporator adopts pipeline to be connected to the low-pressure steam inlet of steam jet ejector, and the pressurized outlet of steam jet ejector connects the low-pressure steam inlet of flash distillation wave pressure supercharger, drives steam to enter from the high pressure entry of steam jet ejector.
In technique scheme, described each single-effect evaporator refers to: first evaporator, several single-effect evaporators and last evaporator; The circulating pump of described each single-effect evaporator refers to: first effect circulating pump, several effect circulating pumps and end effect circulating pump; Liquid uniform device in this single-effect evaporator refers to: first effect liquid uniform device, several effect liquid uniform devices and end effect liquid uniform device.
The motion that technique scheme utilizes high pressure flash distillation that is saturated or overheated aqueous water to produce swashs supercharging performance, constructs a kind of novel flash distillation wave steam recompression mechanism (FEWVR, Flashing Evaporation Wave Vapor Recompression).In realized system, utilize flash distillation wave pressure supercharger, the gas phase pressurization of water vapour is converted into the liquid phase pressurization of saturation water, the process efficiency of liquid booster pump is far above the charging efficiency of gas compressor.Wherein, the driving heat source of flash distillation supercharging wave rotor is industrial waste heat (hot water or steam), and be end effect evaporation indirect steam by purging stream, supercharging and overheated rear re-using latent heat, reach energy-conservation object.
The Automated condtrol scheme of technique scheme, inlet pressure and the temperature that should control flash distillation wave pressure supercharger keep stable, and all the other control programs there is no particular/special requirement and restriction.
According to the actual state of material liquid evaporating temperature, the recompression ratio of indirect steam has dividing of height, can have and adopt thermodynamic steam compression+flash distillation wave both vapor compression coupling technique and flash distillation wave steam recompression technique two kinds of implementation methods.For the situation that indirect steam pressure ratio is lower, only adopt flash distillation complex supercharge to complete, namely adopt FEWVR technique.For low-temperature evaporation situation, vacuum is high, and supercharging pressure ratio is high, and flash distillation wave rotor unsteady flo w can be adopted to compress the hybrid technique of FEW+ low-pressure ratio thermodynamic steam compression TVR, i.e. FEW/TVR technique.
The invention has the beneficial effects as follows: the flash distillation wave steam recompression FEWVR technology that this flash distillation wave steam recompression continuous evaporation system proposes, compare existing machinery steam recompression MVR and thermodynamic steam recompression TVR technology, there is following technical advantage:
The first, relative to function of mechanical steam recompression MVR technology, flash distillation wave recompression FEWR technology is without an equipment development difficult problem, and thermodynamic advantages is gas phase pressurization to be converted into liquid phase pressurization, and process efficiency improves.
The second, relative to thermodynamic steam recompression TVR technology, the advantage of flash distillation wave recompression FEWR technology is the efficiency of charging efficiency far above steam jet ejector.Steam jet ejector can only complete an expansion process, drives the latent heat utilization rate of steam low.
Three, for without steam occasion, thermodynamic steam recompression TVR technology uses limited, but the driving heat source of flash distillation wave recompression FEWR can be industrial waste heat, or even solar energy or geothermal energy, and the scope of application is wider.4th, flash distillation wave recompression also possesses outstanding band liquid operating characteristics, and equipment development advantage is that physical dimension is little, rotating speed is low, is easy to exploitation.
Accompanying drawing explanation
Fig. 1 is the continuous evaporation system diagram of a kind of liquid flashes wave recompression FEWVR.
Fig. 2 is that the recompression of a kind of flash distillation wave recompresses the continuous evaporation system diagram of the FEW/TVR that is combined with thermodynamic steam.
In figure: 1, vavuum pump, 2, steam-water separator, 3, last evaporator, 3a, end effect heat exchanger, 3b, end effect liquid uniform device, 4, condenser, 5, heavy liquor pump, 6, condensate pump, 7, end effect circulating pump, 7a, first effect circulating pump, 7b, secondary effect circulating pump, 8, secondary single-effect evaporator, 8a, secondary effect heat exchanger, 8b, secondary effect liquid uniform device, 9, first evaporator, 9a, first effect heat exchanger, 9b, first effect liquid uniform device, 10, booster pump, 11, thermal source heat exchanger, 12, first control valve, 13, flash distillation wave pressure supercharger, 14, stoste pipe, 15, second control valve, 16, communicating pipe, 17, steam jet ejector, WH, driving saturated liquid entrance, WL, low-pressure steam inlet, WM, flash distillation wave supercharger outlet, JH, injector drive steam inlet, JL, injector low-pressure steam inlet, JM, injector pressurized outlet.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
embodiment 1utilize saturated or overheated aqueous water in flash distillation wave pressure supercharger, complete the recompression of indirect steam.
Fig. 1 shows a kind of flash distillation wave steam recompression continuous evaporation system.In figure, flash distillation wave steam recompression continuous evaporation system comprises a triple effect evaporator, heavy liquor pump 5, condensate pump 6, thermal source heat exchanger 11, triple effect evaporator is made up of first evaporator 9, secondary single-effect evaporator 8 and last evaporator 3, and first evaporator 9 adopts communicating pipe 16 to be connected to each other with time single-effect evaporator 8, secondary single-effect evaporator 8 with the bottom of last evaporator 3.The head adopting the head of first evaporator 9 to imitate in circulating pump 7a connection first evaporator 9 imitates liquid uniform device 9b, adopt time effect liquid uniform device 8b in the secondary effect circulating pump 7b connection time single-effect evaporator 8 of secondary single-effect evaporator 8, the end effect circulating pump 7 of employing last evaporator 3 connects the end effect liquid uniform device 3b in last evaporator 3.The outlet of thermal source heat exchanger 11 is saturated or overheated aqueous water, connect the driving heat source entrance WH of flash distillation wave pressure supercharger 13, the head that the pressurized outlet WM of flash distillation wave pressure supercharger 13 connects in first evaporator 9 imitates heat exchanger 9a, and the upper space of last evaporator 3 adopts pipeline to connect the low-pressure steam inlet WL of flash distillation wave pressure supercharger 13; Described first evaporator 9 upper space connects the secondary effect heat exchanger 8a in time single-effect evaporator 8 by pipeline, and secondary single-effect evaporator 8 upper space connects the end effect heat exchanger 3a in last evaporator 3 by pipeline; Stoste enters from the stoste import of the condenser 4 being positioned at last evaporator 3 upper space, enters in first evaporator 9 through stoste pipe 14, and the bottom of last evaporator 3 connects heavy liquor pump 5, is provided with solidifying water connects dish 18 in the bottom of condenser 4; The upper space of last evaporator 3 adopts pipeline to connect vavuum pump 1 through steam-water separator 2; First effect heat exchanger 9a, secondary effect heat exchanger 8a connect the common water inlet being connected booster pump 10 and condensate pump 6 of dish 18 with the outlet of end effect heat exchanger 3a with solidifying water, and booster pump 10 connects thermal source heat exchanger 11 through the second control valve 15.The inlet temperature of flash distillation wave pressure supercharger 13 and pressure remain stable respectively by the first control valve 12 and the second control valve 15, and pressure raising is completed by booster pump 10.
In each single-effect evaporator, evaporation side heat exchange adopts the liquid uniform device of forced circulation to complete liquid distribution.Following current and and flow in feeding manner, the feed liquid of front effect and aftereffect relies on pressure reduction to complete conveying; In adverse current feeding mode, forced circulation pump is relied on to complete feed liquid conveying.Flash distillation wave pressure supercharger 13 is three port flash distillation wave rotor boosters.
Flash distillation wave steam boosting (FEWVR) vapo(u)rization system is applied to the fields such as salt mine pretreatment, saline sewage process and desalinization.
Stoste enters in first evaporator 9 after entering condenser 4 preheating in last evaporator 3; Enter in flashed vapour ripple booster 13 after end effect secondary steam condensation portion steam, the supercharging mechanism of the unsteady flo w shock wave utilizing saturation water flash distillation to produce, stream stock heat content increases, enter first evaporator 9 as driving heat source, the indirect steam that first effect evaporation produces enters time single-effect evaporator 8 and serves as driving heat source, stoste after first effect evaporation utilizes pressure reduction to be delivered in time single-effect evaporator 8 to evaporate further, carries out, until original liquid concentration reaches technique needs or crystallization saturated concentration, being exported by heavy liquor pump 5 with this.
Evaporimeter respectively imitates the forced circulation unit of gas-liquid separation unit and the stoste that all can arrange indirect steam.Each effect stoste can adopt following current and stream and reflux type charging, and respectively between effect, stoste conveying is corresponding respectively utilizes the mode that pressure reduction natural flow is carried and forced circulation is carried.
embodiment 2combine the recompression utilizing and complete indirect steam in steam jet ejector and flash distillation wave pressure supercharger.
Fig. 2 shows the recompression of a kind of thermodynamic steam and recompresses with flash distillation wave steam the continuous evaporation system be combined.The difference of Fig. 2 and Fig. 1 is: the upper space of last evaporator 3 adopts pipeline to be connected to the low-pressure steam inlet JL of steam jet ejector 17, the pressurized outlet JM of steam jet ejector 17 connects the low-pressure steam inlet WL of flash distillation wave pressure supercharger 13, drives steam to enter from the high pressure entry JH of steam jet ejector 17.
In each single-effect evaporator, evaporation side heat exchange adopts the liquid uniform device of forced circulation to complete liquid distribution.Following current and and flow in feeding manner, the feed liquid of front effect and aftereffect relies on pressure reduction to complete conveying; In adverse current feeding mode, forced circulation pump is relied on to complete the conveying of stoste.Flash distillation wave pressure supercharger 13 is three port flash distillation wave rotor boosters, and steam jet ejector is that centre is entered to drive steam, and ring week enters low-pressure secondary steam.
The vapo(u)rization system that flash distillation wave steam boosting and thermodynamic steam recompression coupling (FEW/TVR) are formed is applied to the fields such as salt mine pretreatment, saline sewage process and desalinization.
Stoste enters in first evaporator 9 after entering condenser 4 preheating in last evaporator 3, enter steam jet ejector 17 after end effect secondary steam condensation portion steam (or not condensation) and carry out low-pressure ratio precommpression, the indirect steam that heat content increases enters in flash distillation wave pressure supercharger 13, the supercharging mechanism of the unsteady flo w shock wave utilizing saturated or overheated high-pressure liquid water to produce, stream stock heat content increases, enter first evaporator 9 as driving heat source, the indirect steam that first effect evaporation produces enters time single-effect evaporator 8 and serves as driving heat source, feed liquid after first effect evaporation utilizes pressure reduction to be delivered in time single-effect evaporator 8 to evaporate further, carry out until feed concentration reaches technique needs or crystallization saturated concentration with this, exported by heavy liquor pump 5.
Evaporimeter respectively imitates the forced circulation unit of gas-liquid separation unit and the stoste that all can arrange indirect steam.Each effect stoste can adopt following current and stream and reflux type charging, and respectively between effect, feed liquid conveying is corresponding respectively utilizes the mode that pressure reduction natural flow is carried and forced circulation is carried.Flash distillation wave pressure supercharger 13 is three port flash distillation wave rotor boosters, and steam jet ejector 17 is for entering to drive steam in centre, and ring week enters low-pressure secondary steam.
Claims (2)
1. a flash distillation wave steam recompression continuous evaporation system, it comprises a multi-effect evaporator, heavy liquor pump (5), condensate pump (6), thermal source heat exchanger (11), multi-effect evaporator is made up of first evaporator (9), several single-effect evaporators (8) and last evaporator (3), it is characterized in that: further comprising a flash distillation wave pressure supercharger (13), booster pump (10) and vavuum pump (1), the bottom of adjacent each single-effect evaporator adopts communicating pipe (16) to connect, and also adopts the circulating pump of each single-effect evaporator to connect liquid uniform device in this single-effect evaporator; Outlet is saturated or the thermal source heat exchanger (11) of overheated aqueous water connects the driving heat source entrance (WH) of flash distillation wave pressure supercharger (13) and regulates first control valve (12) of flash distillation wave pressure supercharger (13) inlet temperature, pressurized outlet (WM) head connected in first evaporator (9) of flash distillation wave pressure supercharger (13) imitates heat exchanger (9a), and the upper space of last evaporator (3) adopts pipeline to connect the low-pressure steam inlet (WL) of flash distillation wave pressure supercharger (13); Described first evaporator (9) upper space connects the secondary effect heat exchanger (8a) in time single-effect evaporator (8) by pipeline, by that analogy, prime time single-effect evaporator upper space connects the secondary effect heat exchanger in rear class time single-effect evaporator by pipeline, and final stage time single-effect evaporator upper space connects the end effect heat exchanger (3a) in last evaporator (3) by pipeline; Stoste enters from the stoste import of the condenser (4) being positioned at last evaporator (3) upper space, enter in first evaporator (9) through stoste pipe (14), the bottom of last evaporator (3) connects heavy liquor pump (5), is provided with solidifying water connects dish (18) in the bottom of condenser (4); The upper space of described last evaporator (3) adopts pipeline to connect vavuum pump (1) through steam-water separator (2); In described each single-effect evaporator, the outlet of each effect heat exchanger connects with solidifying water the water inlet coiling (18) and be jointly connected booster pump (10) and condensate pump (6), and booster pump (10) connects thermal source heat exchanger (11) through regulating second control valve (15) of flash distillation wave pressure supercharger (13) inlet pressure.
2. a kind of flash distillation wave steam recompression continuous evaporation system according to claims 1, it is characterized in that: the upper space of described last evaporator (3) adopts pipeline to be connected to the low-pressure steam inlet (JL) of steam jet ejector (17), the pressurized outlet (JM) of steam jet ejector (14) connects the low-pressure steam inlet (WL) of flash distillation wave pressure supercharger (13), drives steam to enter from the high pressure entry (JH) of steam jet ejector.
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CN105180495A (en) * | 2015-10-13 | 2015-12-23 | 大连理工大学 | Wave rotor cascade refrigeration system and working method thereof |
CN105509359A (en) * | 2015-12-24 | 2016-04-20 | 大连理工大学 | Phase change wave rotor self-cascade refrigeration system and working method thereof |
CN105833559A (en) * | 2016-05-11 | 2016-08-10 | 耒阳金悦科技发展有限公司 | Industrial separation equipment |
CN105854328A (en) * | 2016-05-11 | 2016-08-17 | 耒阳金悦科技发展有限公司 | Industrial separation method |
CN106765049A (en) * | 2016-12-05 | 2017-05-31 | 四川大学 | Steam heat pump and low-pressure steam mend the method that enthalpy supercharging is utilized |
CN109806751A (en) * | 2019-03-25 | 2019-05-28 | 周岩 | A kind of low energy consumption fire coal boiler fume takes off white system |
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CN105854328A (en) * | 2016-05-11 | 2016-08-17 | 耒阳金悦科技发展有限公司 | Industrial separation method |
CN106765049A (en) * | 2016-12-05 | 2017-05-31 | 四川大学 | Steam heat pump and low-pressure steam mend the method that enthalpy supercharging is utilized |
CN106765049B (en) * | 2016-12-05 | 2019-06-18 | 四川大学 | Steam heat pump and low-pressure steam mend enthalpy and are pressurized the method utilized |
CN109806751A (en) * | 2019-03-25 | 2019-05-28 | 周岩 | A kind of low energy consumption fire coal boiler fume takes off white system |
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