CN212532606U - System for evaporating and concentrating desulfurization wastewater by using flue gas waste heat - Google Patents
System for evaporating and concentrating desulfurization wastewater by using flue gas waste heat Download PDFInfo
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- CN212532606U CN212532606U CN202020399922.5U CN202020399922U CN212532606U CN 212532606 U CN212532606 U CN 212532606U CN 202020399922 U CN202020399922 U CN 202020399922U CN 212532606 U CN212532606 U CN 212532606U
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Abstract
The utility model discloses an utilize system of flue gas waste heat evaporation concentration desulfurization waste water has solved current multiple-effect and MVR evaporation technique and needs to increase the effective heat of volume medicament preliminary treatment, high temperature flue gas waste heat treatment technique and need consume and have the influential scheduling problem to rear-end system, the utility model discloses a concentration tower, concentration tower is provided with flue gas entry, exhanst gas outlet, filtrating entry and waste water entry, flue gas entry and exhanst gas outlet all with quote the main flue and be connected, concentration tower inside is provided with sprays the layer, is provided with the circulating pump outside concentration tower, the one end of circulating pump and the circulation liquid exit linkage of concentration tower, the other end of circulating pump with spray the layer intercommunication, the filtrating entry is located spray between layer and the circulation liquid export, concentration tower bottom is provided with the thick liquids export. The utility model has the advantages of simple flow structure, easy operation, no influence on other systems, utilization of the waste heat of the raw flue gas before desulfurization, waste treatment by waste, realization of zero discharge of waste water, and the like.
Description
Technical Field
The utility model relates to a flue gas desulfurization waste water treatment field, concretely relates to utilize system of flue gas waste heat evaporation concentration desulfurization waste water.
Background
At present, domestic flue gas desulfurization can be divided into three major categories, namely a wet method, a semi-dry method and a dry method, wherein the limestone-gypsum wet flue gas desulfurization process has the advantages of high desulfurization efficiency, high operation reliability, wide applicable coal range, high utilization rate of an absorbent, high equipment operation rate, low price and easy availability of the absorbent and the like, is the most widely applied and technically mature SO2 removal technology in the world at present, and accounts for about 90% of the capacity of an installed FGD unit.
The desulfurization wastewater refers to wastewater generated by limestone-gypsum wet desulfurization. The desulfurization wastewater treatment is a great problem of coal-fired power plants in power plants at present, and various treatment methods have many problems at present:
the desulfurization waste water has complex components, contains a large amount of salt-dissolving ions and solid matters, and is difficult to purify. And the traditional triple-header treatment technology needs to add hydrated lime, the generated water only removes most of solid and partial sulfate ions, and the generated water contains a large amount of dissolved salt ions, such as chloride ions, magnesium ions, sulfate ions and other ions.
The multiple-effect and MVR evaporation technologies need to pretreat the desulfurization wastewater, consume a large amount of hydrated lime and sodium carbonate, generate a large amount of mud cakes, obtain a small amount of sodium chloride, hardly ensure the qualification rate of the sodium chloride, and have the risk of scaling and blocking an evaporator.
Later, a technology for evaporating desulfurization wastewater by using waste heat of high-temperature flue gas appears, but the technology needs to consume effective heat of a boiler at present, the coal consumption of power generation is increased, and in addition, the technology is easy to block and corrode, and a rear-end dust remover can have certain influence on the quality of fly ash.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: present multiple-effect and MVR evaporation technology need increase volume medicament preliminary treatment, high temperature flue gas waste heat treatment technique need consume effective heat and influential to the back-end system, the utility model aims to provide an utilize the system of flue gas waste heat evaporation concentration desulfurization waste water, solve the problem of the processing of desulfurization waste water.
The utility model discloses a following technical scheme realizes:
the utility model provides an utilize system of flue gas waste heat evaporation concentration desulfurization waste water, includes the concentrated tower, the concentrated tower is provided with flue gas entry, exhanst gas outlet, filtrating entry and waste water entry, flue gas entry and exhanst gas outlet all are connected with quoting the flue, the concentrated tower is inside to be provided with and to spray the layer, is provided with the circulating pump outside the concentrated tower, the one end of circulating pump and the circulation liquid exit linkage of concentrated tower, the other end of circulating pump with spray the layer intercommunication, the filtrating entry is located spray between layer and the circulation liquid export, concentrated tower bottom is provided with the thick liquids export.
The utility model dehydrates the discharged thick slurry, the obtained filtrate enters the concentration tower through the filtrate inlet and participates in circulation, and evaporation concentration is carried out again, the filtrate inlet is positioned between the spraying layer and the circulating liquid outlet, after the filtrate enters the concentration tower, the filtrate does not immediately participate in spraying, but reaches the bottom of the concentration tower for sedimentation, part of the suspended matters or salt which is not filtered out is sent to the bottom of the concentration tower to be used as part of thick slurry, and the upper-layer liquid enters a spraying layer through a circulating pump for spraying, then exchanges heat with the waste heat smoke, and is concentrated and evaporated again, compared with the way that the filtrate directly enters the spraying layer, the amount of the slurry participating in the circulating evaporation can be reduced, the heat consumption is reduced, and the solid matters in the filtrate can be reduced from entering the pipeline and the spraying layer by participating in the circulation after the partial solid matters in the filtrate are settled, so that the scaling of the pipeline and the spraying layer is reduced; in addition, the filtrating is carried and is carried the intermittent type and go on, and the circulating pump operation is continuous, and when the filtrating pump did not start, the filtrating pipe direct access circulation thick liquid pipe can lead to circulation thick liquid refluence to get into the filtrating pond in the filtrating pipeline, and the filtrating pump also can reverse and damage the pump body easily, so the utility model discloses a filtrating directly gets into in the concentration tower.
The utility model discloses preferred a system for utilize flue gas waste heat evaporative concentration desulfurization waste water still includes dense thick liquid case and hydroextractor, dense thick liquid case respectively with thick liquids export and hydroextractor are connected, hydroextractor and filtrating entry linkage.
Further, a stirring device is arranged in the thick slurry tank and used for stirring the thick slurry.
The utility model discloses the desulfurization waste water of concentrating tower can form dense thick liquid at the concentrating tower after evaporation concentration, and dense thick liquid case is used for collecting dense thick liquid to the stirring prevents that it deposits to harden.
The utility model discloses an utilize system of flue gas waste heat evaporative concentration desulfurization waste water, dense thick liquid case with still be provided with the quenching and tempering case between the hydroextractor, the quenching and tempering case is used for carrying out the PH value to the dense thick liquid of participating in the dehydration and adjusts, specifically, adjusts the PH value to more than 2, can weaken the acidity of thick liquid on the one hand, reduces the corruption, and on the other hand, the filtrating that the PH value risees changes the subsides layering after reacing the concentration tower, reduces the solid content that gets into the thick liquid that sprays the layer spraying, reduces circulation volume and heat transfer volume, the energy saving consumed the festival.
Furthermore, the waste water inlet is connected with a waste water tank for caching the desulfurization waste water discharged by the desulfurization system.
The utility model discloses preferred a system for utilize flue gas waste heat evaporation concentration desulfurization waste water, the position of waste water entry is less than under the liquid level in the concentrated tower.
The waste water does not directly participate in spraying, but firstly enters the bottom of a bottom concentration tower for certain sedimentation, partial solid matters in the waste water are precipitated to the bottom of the concentration tower to be used as part of thick slurry, and upper-layer liquid enters a spraying layer through a circulating pump for spraying, then exchanges heat with waste heat flue gas, and is concentrated and evaporated, so that compared with the situation that the waste water directly enters the spraying layer, the amount of the slurry participating in circulating evaporation can be reduced, the heat consumption is reduced, partial solid matters in the waste water participate in circulation after sedimentation, the solid matters in the waste water can be reduced to enter pipelines and the spraying layer, and the scaling of the pipelines and the spraying layer is reduced; in addition, waste water transport is the intermittent type and goes on, and the circulating pump operation is continuous, and when the wastewater pump did not start, the wastewater pipe direct access circulation thick liquid pipe can lead to circulation thick liquid refluence to get into the wastewater disposal basin in the wastewater pipeline, and the wastewater pump also can reverse and damage the pump body easily, so the utility model discloses a waste water directly gets into in the concentrated tower.
The utility model discloses preferred a system for utilize flue gas waste heat evaporation concentration desulfurization waste water, the flue gas entry is located the lateral wall of concentration tower just is located spray the below on layer, the exhanst gas outlet is located the top of concentration tower, the interior top of concentration tower still is provided with the defroster, the defroster is located spray the top on layer.
The flue gas entry is under, the exhanst gas outlet is last with spraying the layer, after the flue gas enters into the concentration tower like this, can form the hot gas flow from bottom to top, flow direction opposite with the vaporific thick liquid that sprays the layer and spout down, form the contact against the current, contact the heat transfer more abundant, at the in-process of contact, evaporate the moisture in the thick liquid through the flue gas waste heat, evaporating water and flue gas get rid of the liquid drop through the defroster, insert in the absorption tower flue, reentry in the desulfurization system absorption tower, the contact against the current is more abundant, promote the effect of flue gas waste heat to the moisture in the thick liquid, further improvement availability factor, and the exhanst gas outlet at the concentration tower top is installed to the defroster, detach most liquid drop of wet flue gas, it causes the salt circulation to.
The utility model discloses preferably a system for utilize flue gas waste heat evaporation concentration desulfurization waste water, the flue gas entry is connected through entry flue and quote the main flue, the exhanst gas outlet through the export flue with quote the main flue and connect, the entry flue still is provided with booster fan, quote the flue gas of main flue and send to inside the concentration tower after the booster fan pressurizes in the entry flue.
The booster fan can improve the wind pressure for the flue gas can enter into the heat transfer in the concentration tower smoothly and will saturate the wet flue gas and send back to the flue stack.
The utility model discloses preferably a system for utilize flue gas waste heat evaporation concentration desulfurization waste water, the filtrating entry is located the offside of circulation liquid export just is located the below of flue gas entry, the position of filtrating entry is less than liquid level in the concentration tower.
After the filtrating gets into the concentration tower, because the filtrating entry is in the offside of circulation liquid export, before the filtrating participates in the circulation, the filtrating has the time of equivalent and deposits earlier, and because the pH value of filtrating is higher, changes and takes place the sediment, moreover, because the filtrating entry is located below the concentration tower inner liquid level, the filtrating gets into afterwards, can not contact with the flue gas, the acidity of flue gas can not exert an influence to the PH of filtrating, makes it keep higher pH value better.
Furthermore, the bottom of the concentration tower is in a cone shape, so that solid matters after concentration can be conveniently precipitated at the bottom, thick slurry is discharged, and the filtrate is more easily precipitated at the cone bottom after entering the concentration tower, so that the amount of liquid participating in evaporation and concentration is reduced.
Further, the waste water inlet is connected with a waste water tank, the waste water tank is connected with a desulfurization system, and the waste water tank is used for caching waste water.
The utility model discloses preferred a system for utilize flue gas waste heat evaporation concentration desulfurization waste water, the entry flue is provided with first flapper door, and first flapper door is used for the isolated system entry flue gas, the export flue is provided with the second flapper door, the second flapper door is used for the isolated system export flue gas.
The utility model discloses a concrete application method includes following step:
step 1: flue gas and waste water enter a tower for heat exchange, evaporation and concentration of waste water
Flue gas enters the concentration tower through an inlet flue and moves from bottom to top, upper liquid of wastewater settled at the bottom of the concentration tower enters a spraying layer through a circulating pump and moves downwards by spraying into an atomized state, and the upper liquid contacts with the flue gas flowing upwards in a counter-current manner to exchange heat and evaporate, so that concentrated wastewater is concentrated to obtain thick slurry;
step 2: discharging thick slurry
Discharging the thick slurry from the concentration tower to a thick slurry box;
and step 3: adjusting the pH value
Conveying the thick slurry in the thick slurry box to a tempering box, and adding an alkaline substance to adjust the pH value to be more than 2;
and 4, step 4: dewatering
And conveying the thick slurry in the quenching and tempering box to a dehydrator for dehydration, and returning the dehydrated filtrate to the bottom of the concentration tower through a filtrate inlet to continuously participate in evaporation concentration.
Preferably, the filtrate is settled and layered after being returned to the concentration tower, and the upper layer slurry is conveyed to the spraying layer through a circulating pump for spraying, so that the circulating heat exchange concentration is realized.
Further, the alkaline substance for adjusting the pH value is one of fly ash, hydrated lime, caustic soda or other alkaline substances.
Further, the PH is 2 or more.
Contain suspended solid in the desulfurization waste water, sulfate and heavy metal etc, the utility model discloses add alkaline material with the thick liquid of collecting and carry out the pH value and adjust, break the state of suspended solid through adding alkaline material, make it change and subside the layering, and the alkaline material of adding reacts with heavy metal ion etc. in the thick liquid, generate the hydroxide that the solubility is little and deposit, solid-liquid separation can carry out better in the dehydration in later stage, and to the suspended solid that remains in the filtrating, and salt etc, can enter into the concentrated tower along with filtrating, because higher pH value makes the thick liquid of concentrated tower bottom subside the layering better, the thick liquids that lower floor's solid content is high are discharged as the thick liquid, and upper strata thick liquids carry out the circulation evaporation, the thick liquids volume of participating in the evaporation has been reduced, the heat consumption has been saved, and the treatment effeciency has been improved.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model discloses an adjust the pH value of thick liquid to rationally set up the position that filtrating enters the mouth and the flue gas entry, make filtrating in participating in the cyclic evaporation concentration process, fully subside, both realized the zero release of waste water, saved heat consumption again, improve the treatment effeciency.
2. The utility model does not need to pretreat the waste water, thereby having strong adaptability to the quality of the waste water; meanwhile, the system is simple to operate and has no influence on the operation of the host.
3. The utility model discloses a waste water evaporation's heat comes from the low temperature flue gas before the desulphurization unit, and the flue gas heat of this part is that evaporation moisture scatters and disappears in the desulfurizing tower, and this heat does not have recycle's value, belongs to used heat, but the utility model discloses get up this heat utilization to the waste system is useless, therefore the working costs of complete system is exactly the station-service power consumption, so the working costs is lower.
4. The water vapor enters the desulfurizing tower along with the flue gas after the waste water is evaporated, the temperature of the flue gas is reduced, the water consumption of a desulfurizing system is correspondingly reduced, and the demister is arranged at the top in the concentrating tower to intercept corrosive liquid drops, so that negative effects on other systems such as a boiler main flue, the desulfurizing system and the like can be avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a system diagram of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a wastewater tank, 2-a concentration tower, 3-a flue gas inlet, 4-a flue gas outlet, 5-a spray layer, 6-a circulating pump, 7-a booster fan, 8-a first baffle door, 9-a guide flue, 10-a second baffle door, 11-an inlet flue, 12-an outlet flue, 13-a slurry outlet, 14-a thick slurry tank, 15-a tempering tank, 16-a dehydrator, 17-a filtrate inlet, and 18-a wastewater inlet.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
As shown in fig. 1, a system for evaporating and concentrating desulfurization wastewater by using flue gas waste heat comprises a concentration tower 2, wherein the concentration tower 2 is provided with a flue gas inlet 3, a flue gas outlet 4, a filtrate inlet 17 and a wastewater inlet 18, the flue gas inlet 3 and the flue gas outlet 4 are both connected with a reference main flue 9, a spray layer 5 is arranged inside the concentration tower 2, a circulating pump 6 is arranged outside the concentration tower 2, one end of the circulating pump 6 is connected with a circulating liquid outlet of the concentration tower 2, the other end of the circulating pump 6 is communicated with the spray layer 5, the filtrate inlet 17 is located between the spray layer 5 and the circulating liquid outlet, a slurry outlet 13 is arranged at the bottom of the concentration tower 2, a thick slurry tank 14 is connected below the slurry outlet 13 and used for collecting thick slurry discharged from the bottom of the concentration tower 2, and a stirring device is arranged in the thick slurry tank 14 and used for stirring the thick slurry to prevent the thick slurry from precipitating, the thick pulp box 14 is connected with a dehydrator 16, the dehydrator 16 is connected with a filtrate inlet 17, thick pulp is dehydrated by the dehydrator 16 after the pH value is adjusted, and filtrate generated by dehydration returns to the bottom of the concentration tower 2 through the filtrate inlet 17.
Example 2
The difference between this embodiment and embodiment 1 lies in, thick liquid case 14 with still be provided with quenching and tempering case 15 between hydroextractor 16, quenching and tempering case 15 is used for carrying out the pH value to the thick liquid of participating in the dehydration and adjusts, specifically, adopts fly ash to adjust the pH value to more than 2, can weaken the acidity of thick liquid on the one hand, reduces the corruption, and the mud cake can not become dangerous waste, and on the other hand, the filtrating that the pH value rised is changeed and is subsided the layering after reaching concentration tower 2, reduces the solid content that gets into the thick liquid that sprays 5 sprays in the layer, reduces circulation volume and heat transfer volume, energy saving consumption.
Example 3
The difference between the embodiment and the embodiment 2 is that the flue gas inlet 3 is located on the side wall of the concentration tower 2 and below the spray layer 5, the flue gas inlet 3 is located above the opposite side of the filtrate inlet 17, the flue gas inlet 3 is connected with the citing main flue 9 through the inlet flue 11, the flue gas outlet 4 is connected with the citing main flue 9 through the outlet flue 12, the inlet flue 11 is provided with a first baffle door 8, the first baffle door 8 is used for isolating the system inlet flue gas, a booster fan 7 is further arranged between the first baffle door 8 and the flue gas inlet 3, the flue gas citing the main flue 9 is sent to the interior of the concentration tower 2 after being pressurized in the inlet flue 11 by the booster fan 7, the flue gas outlet 4 is located at the top of the concentration tower 2, the outlet flue 12 is provided with a second baffle door 10, the second baffle door 10 is used for isolating the system outlet flue gas, the inner top of the concentration tower 2 is also provided with a demister, and the demister is positioned above the spraying layer 5.
The flue gas entry 3 is down, the exhanst gas outlet 4 is last with spraying layer 5, after the flue gas enters into the concentration tower 2 like this, can form the hot gas flow from bottom to top, flow direction with the vaporific thick liquid that sprays layer 5 and spout down is opposite, form the contact against the current, the contact heat transfer is more abundant, in the in-process of contact, evaporate the moisture in the thick liquid through the flue gas waste heat, evaporating water and flue gas get rid of the liquid drop through the defroster, insert in the absorption tower flue, reentrant in the desulfurization system absorption tower, the contact against the current is more abundant, promote the effect of flue gas waste heat to the moisture in the thick liquid, further improvement availability factor, and the exhanst gas outlet 4 department at concentration tower 2 top is installed to the defroster, detach the liquid drop of wet flue gas.
The filtrate inlet 17 is positioned at the opposite side of the circulating liquid outlet and below the flue gas inlet 3, and the position of the filtrate inlet 17 is lower than the liquid level in the concentration tower 2.
After the filtrating gets into concentration tower 2, because filtrating entry 17 is in the contralateral side of circulation liquid export, before the filtrating participates in the circulation, the filtrating has the time earlier to deposit, and because the pH value of filtrating is higher, more easily takes place the sediment, moreover, because filtrating entry 17 is located concentration tower 2 internal liquid level below, after the filtrating gets into, can not contact with the flue gas, the acidity of flue gas can not exert an influence to the PH of filtrating, makes it keep higher pH value better.
The bottom of the concentration tower 2 is in a cone shape, so that solid matters after concentration can be conveniently precipitated at the bottom, thick slurry is discharged, and the filtrate is more easily precipitated at the cone bottom after entering the concentration tower 2, and the amount of liquid participating in evaporation concentration is reduced.
Example 4
The difference between the embodiment and the embodiment 3 is that the wastewater inlet 18 is connected with the wastewater tank 1, the wastewater tank 1 is connected with a desulfurization system, the wastewater tank 1 is used for buffering wastewater, the wastewater inlet 18 is located between the spray layer 5 and the filtrate inlet 17, the wastewater does not directly participate in spraying, but goes to the bottom of the bottom concentration tower 2 for certain sedimentation, part of solid matters in the wastewater are precipitated to the bottom of the concentration tower 2 as part of concentrated slurry, and the upper layer liquid enters the spray layer 5 through the circulating pump 6 for spraying, then exchanges heat with the residual heat flue gas, is concentrated and evaporated, compared with the case that the wastewater directly enters the spray layer 5, the amount of slurry participating in circulating evaporation can be reduced, the heat consumption is reduced, and part of solid matters in the wastewater can be reduced to enter the pipeline and the spray layer 5 through sedimentation and then participate in circulation, reducing the scaling of the pipeline and the spraying layer 5.
The specific implementation manner of this embodiment includes the following steps:
step 1: flue gas and waste water enter a tower for heat exchange, evaporation and concentration of waste water
The flue gas introduced into the main flue 9 is introduced into the concentration tower 2 through the inlet flue 11 under the action of the booster fan 7 and moves from bottom to top, the upper liquid of the wastewater settled at the bottom of the concentration tower 2 enters the spraying layer 5 through the circulating pump 6 and moves downwards in an atomized state through spraying, the upper liquid contacts with the flue gas flowing upwards in a countercurrent manner to exchange heat and evaporate, the concentrated wastewater obtains concentrated slurry which is 5-25 times of the original liquid, the wet flue gas after heat exchange enters the outlet flue 12 through the flue gas outlet 4 after liquid drops are removed by the demister and then returns to the main flue 9 again, and the solid content of the wastewater losing moisture through heat exchange is raised and falls into the bottom of the concentration tower 2;
step 2: discharging thick slurry
Discharging the thick slurry from the concentration tower 2 to a thick slurry tank 14;
and step 3: adjusting the pH value
Conveying the thick slurry in the thick slurry box 14 to a tempering box 15, and adding fly ash or hydrated lime to adjust the PH to be more than 2;
and 4, step 4: dewatering
The thick slurry in the tempering box 15 is conveyed to a dehydrator 16 for dehydration, and the dehydrated filtrate returns to the bottom of the concentration tower 2 through a filtrate inlet 17 to continuously participate in evaporation concentration.
And after the filtrate returns to the concentration tower 2, the filtrate is firstly settled and layered, and then the upper layer of slurry is conveyed to the spraying layer 5 through the circulating pump 6 for spraying, so that the circulating heat exchange concentration is realized.
Example 5
This embodiment differs from embodiment 4 in that the thick stock tank 14 is connected to a drying device and the thick stock is not dewatered but directly subjected to a drying process.
The utility model discloses in, thick liquid case 14 still can connect other comprehensive utilization equipment and utilize thick liquid.
In the utility model, the directions of the upper, lower and opposite sides are the same. The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides an utilize system of flue gas waste heat evaporation concentration desulfurization waste water, its characterized in that, including concentrating tower (2), concentrating tower (2) are provided with flue gas entry (3), exhanst gas outlet (4), filtrating entry (17) and waste water entry (18), flue gas entry (3) and exhanst gas outlet (4) all are connected with quoting main flue (9), concentrating tower (2) inside is provided with sprays layer (5), is provided with circulating pump (6) in concentrating tower (2) outside, the one end of circulating pump (6) and the circulation liquid export intercommunication of concentrating tower (2), the other end of circulating pump (6) with spray layer (5) intercommunication, filtrating entry (17) are located spray between layer (5) and the circulation liquid export, concentrating tower (2) bottom is provided with thick liquids export (13).
2. The system for evaporating and concentrating desulfurization wastewater by using flue gas waste heat according to claim 1, further comprising a thick slurry tank (14) and a dehydrator (16), wherein the thick slurry tank (14) is respectively connected with the slurry outlet (13) and the dehydrator (16), and the dehydrator (16) is connected with the filtrate inlet (17).
3. The system for evaporating and concentrating desulfurization wastewater by using flue gas waste heat as claimed in claim 2, characterized in that a tempering tank (15) is further arranged between the thick slurry tank (14) and the dehydrator (16).
4. A system for evaporating and concentrating desulfurization waste water by using the waste heat of flue gas according to any one of claims 1 to 3, characterized in that the waste water inlet (18) is connected with the waste water tank (1).
5. The system for evaporative concentration of desulfurization waste water by using waste heat of flue gas as claimed in any one of claims 1-3, wherein the flue gas inlet (3) is located on the side wall of the concentration tower (2) and below the spray layer (5), the flue gas outlet (4) is located on the top of the concentration tower (2), the inner top of the concentration tower (2) is further provided with a demister, and the demister is located above the spray layer (5).
6. The system for evaporative concentration of desulfurization waste water by using waste heat of flue gas as claimed in any one of claims 1 to 3, wherein the flue gas inlet (3) is connected with the citing main flue (9) through an inlet flue (11), the flue gas outlet (4) is connected with the citing main flue (9) through an outlet flue (12), the inlet flue (11) is further provided with a booster fan (7), and the flue gas citing the main flue (9) is pressurized in the inlet flue (11) by the booster fan (7) and then is sent to the interior of the concentration tower (2).
7. The system for evaporative concentration of desulfurization waste water by using the waste heat of flue gas as recited in any one of claims 1 to 3, wherein said filtrate inlet (17) is located opposite to said circulating liquid outlet and below said flue gas inlet (3), and said filtrate inlet (17) is located at a position lower than the liquid level in said concentration tower (2).
8. The system for evaporative concentration of desulfurization waste water by using waste heat of flue gas as claimed in claim 6, characterized in that said inlet flue (11) is provided with a first damper door (8), said first damper door (8) is used for isolating system inlet flue gas, said outlet flue (12) is provided with a second damper door (10), said second damper door (10) is used for isolating system outlet flue gas.
9. The system for evaporating and concentrating desulfurization waste water by using the waste heat of flue gas as claimed in any one of claims 1 to 3 or 8, characterized in that a demister is arranged at the top of the inner part of the concentration tower (2), and the demister is positioned above the spraying layer (5).
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| CN202020399922.5U CN212532606U (en) | 2020-03-25 | 2020-03-25 | System for evaporating and concentrating desulfurization wastewater by using flue gas waste heat |
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| CN202020399922.5U CN212532606U (en) | 2020-03-25 | 2020-03-25 | System for evaporating and concentrating desulfurization wastewater by using flue gas waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111252993A (en) * | 2020-03-25 | 2020-06-09 | 成都锐思环保技术股份有限公司 | System and method for evaporating and concentrating desulfurization wastewater by using flue gas waste heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111252993A (en) * | 2020-03-25 | 2020-06-09 | 成都锐思环保技术股份有限公司 | System and method for evaporating and concentrating desulfurization wastewater by using flue gas waste heat |
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