CN210206367U - Wastewater treatment system - Google Patents
Wastewater treatment system Download PDFInfo
- Publication number
- CN210206367U CN210206367U CN201920689401.0U CN201920689401U CN210206367U CN 210206367 U CN210206367 U CN 210206367U CN 201920689401 U CN201920689401 U CN 201920689401U CN 210206367 U CN210206367 U CN 210206367U
- Authority
- CN
- China
- Prior art keywords
- wastewater
- slurry
- desulfurization
- flue gas
- waste water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
The embodiment of the utility model provides a wastewater treatment system. The wastewater treatment system comprises: the waste water concentration tower comprises a first accommodating space, a first flue gas inlet and a first flue gas outlet, and the first flue gas inlet and the first flue gas outlet are communicated with the first accommodating space; waste water spraying portion, waste water spraying portion include that waste water sprays the layer, and waste water sprays the layer setting in the first accommodation space of waste water concentration tower, and is located between first flue gas entry and the first exhanst gas outlet, and waste water sprays moisture in the layer spun waste water thick liquid and is treated desulfurization flue gas evaporation absorption, and absorbs treating of moisture and flow from first exhanst gas outlet. The wastewater treatment system can reduce water consumption.
Description
Technical Field
The embodiment of the utility model provides a relate to environmental protection equipment technical field, especially relate to a wastewater treatment system.
Background
In the existing field of flue gas treatment, particularly the field of flue gas treatment generated by boiler combustion, a wet desulphurization process is usually adopted for treatment. The wet desulphurization process is to convey the high-temperature unsaturated flue gas into an absorption tower, the high-temperature unsaturated flue gas and the desulphurization slurry in the absorption tower generate gas-liquid mass transfer reaction, and the high-temperature unsaturated flue gas evaporates the moisture in the desulphurization slurry to be cooled and humidified to form low-temperature saturated flue gas; meanwhile, the acid gas in the high-temperature unsaturated flue gas reacts with the reducing agent in the desulfurization slurry to generate salts so as to remove the acid gas, such as sulfur dioxide and the like.
In the wet desulphurization process, because the high-temperature unsaturated flue gas contains a certain amount of chloride ions, the chloride ions in the high-temperature unsaturated flue gas can be washed and accumulated in the desulphurization slurry in the gas-liquid mass transfer process. Meanwhile, since water in the desulfurization slurry is evaporated, water needs to be supplemented to the desulfurization slurry, and a small amount of chloride ions are also contained in the water supplemented to the desulfurization slurry. As the desulfurization reaction proceeds, chloride ions in the desulfurization slurry are accumulated and increased.
On one hand, the high-concentration chloride ions in the desulfurization slurry can cause great corrosion to equipment of a flue gas treatment system, and the service life is influenced; on the other hand, a higher chloride ion content in the desulfurization slurry lowers the desulfurization efficiency. In order to avoid these problems, the flue gas treatment system needs to regularly discharge a certain amount of wastewater in order to ensure that the chloride ions in the desulfurization slurry are stabilized at a certain concentration (generally required to be 20000ppm or less), so that the chloride ions are discharged out of the flue gas treatment system along with the wastewater, thereby ensuring that the concentration of the chloride ions in the desulfurization slurry meets the requirements.
In summary, in the working process of the existing flue gas treatment system, waste water needs to be discharged, and the discharged waste water is generally discharged into a municipal sewage system after being treated, but even if the waste water is treated, the waste water also has more salt, heavy metal and the like, so that the environment still has great pollution, meanwhile, the discharged waste water also increases the water consumption of the flue gas treatment system, and the amount of the waste water discharged by each 300MW unit is about 5t/h, so that the water resource consumption is extremely high.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present invention provide a wastewater treatment system to solve some or all of the above problems.
According to a first aspect of the embodiments of the present invention, there is provided a wastewater treatment system, comprising: the waste water concentration tower comprises a first accommodating space, a first flue gas inlet and a first flue gas outlet, and the first flue gas inlet and the first flue gas outlet are communicated with the first accommodating space; waste water spraying portion, waste water spraying portion include that waste water sprays the layer, and waste water sprays the layer setting in the first accommodation space of waste water concentration tower, and is located between first flue gas entry and the first exhanst gas outlet, and waste water sprays moisture in the layer spun waste water thick liquid and is treated desulfurization flue gas evaporation absorption, and absorbs treating of moisture and flow from first exhanst gas outlet.
Optionally, effluent disposal system still includes the desulfurization absorption tower, and the desulfurization absorption tower includes that second accommodation space and desulfurization thick liquid spray the layer, and the desulfurization thick liquid sprays the layer and sets up in the second accommodation space, and the second flue gas entry that treats the desulfurization flue gas from first flue gas outlet outflow passes through the desulfurization absorption tower gets into the second accommodation space to with the desulfurization thick liquid contact desulfurization after the second exhanst gas outlet outflow from the desulfurization absorption tower.
Optionally, the lower part of second accommodation space is the desulfurization thick liquid pond, and the desulfurization absorption tower still includes the desulfurization circulating pump, and the desulfurization thick liquid pond is connected to the desulfurization circulating pump and the desulfurization thick liquid sprays the layer to carry the desulfurization thick liquid in the desulfurization thick liquid pond to the desulfurization thick liquid sprays the layer.
Optionally, the wastewater treatment system further comprises a wastewater conveying part, wherein the wastewater conveying part is connected with the wastewater concentration tower, and is used for pretreating desulfurization wastewater to form wastewater slurry, conveying the wastewater slurry into the wastewater concentration tower, and spraying through the wastewater spraying layer.
Optionally, the wastewater conveying part comprises a wastewater cyclone, the wastewater cyclone is used for pretreating desulfurization wastewater to separate wastewater slurry and bottom flow, and the wastewater slurry is conveyed to the wastewater concentration tower.
Optionally, the wastewater conveying part further comprises a wastewater buffer container and a wastewater conveying pump which are connected between the wastewater cyclone and the wastewater concentration tower, the wastewater buffer container is used for containing wastewater slurry flowing out of the wastewater cyclone, and the wastewater conveying pump conveys the wastewater slurry in the wastewater buffer container to the wastewater concentration tower.
Optionally, the lower part of first accommodation space is the waste water circulation pond, and waste water spraying portion still includes the waste water circulating pump, and the waste water circulating pump is connected between waste water circulation pond and waste water spraying layer to carry the waste water thick liquid in the waste water circulation pond to waste water spraying layer.
Optionally, the wastewater treatment system further comprises a dewatering section that draws the wastewater slurry from the wastewater concentration tower and separates a filtrate from the wastewater slurry, and conveys the filtrate to the wastewater concentration tower.
Optionally, the dewatering section includes a dewatering machine and a wastewater dewatering pump, the wastewater dewatering pump is connected between the dewatering machine and the wastewater concentration tower, and is activated when it is determined that the solid content of the wastewater slurry in the wastewater concentration tower is greater than or equal to a set value, the wastewater slurry is pumped out of the wastewater concentration tower and conveyed to the dewatering machine, and the dewatering machine separates filtrate from the wastewater slurry.
Optionally, the wastewater treatment system further comprises a flue gas dust collector for removing dust from flue gas to be desulfurized, and the flue gas dust collector is connected with the wastewater concentration tower and the desulfurization absorption tower respectively.
According to the utility model provides a wastewater treatment system, it includes the waste water concentration tower, in the waste water concentration tower, treats that desulfurization flue gas and waste water spray the waste water thick liquid contact that the layer sprayed out, realizes the heat transfer to evaporate into vapor with the moisture in the waste water thick liquid, make these moisture get into with the form of vapor and treat desulfurization flue gas in, realized the recovery of waste water, reduced the waste of water resource, practiced thrift the resource. In addition, as the water in the wastewater slurry is evaporated, when the concentration of the chloride ions in the wastewater slurry reaches saturation, the chloride ions can be separated out, so that the content of the chloride ions in the wastewater slurry can be reduced, and the corrosivity can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic structural view of a wastewater treatment system according to an embodiment of the present invention.
Description of reference numerals:
1. a wastewater concentration tower; 2. a wastewater spray layer; 3. a desulfurization absorption tower; 4. a desulfurization slurry spray layer; 5. a desulfurization circulating pump; 6. a wastewater cyclone; 7. underflow; 8. a wastewater buffer container; 9. a wastewater delivery pump; 10. a wastewater circulating pump; 11. a dehydrator; 12. filtering the solution; 13. a wastewater dewatering pump; 14. a flue gas dust remover; 15. an induced draft fan; 16. a booster fan.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the embodiments of the present invention, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person having ordinary skill in the art should belong to the scope protected by the embodiments of the present invention.
The embodiment of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, according to the embodiment of the present invention, the wastewater treatment system includes a wastewater concentration tower 1 and a wastewater spraying part, the wastewater concentration tower 1 includes a first accommodating space, a first flue gas inlet and a first flue gas outlet, both the first flue gas inlet and the first flue gas outlet are communicated with the first accommodating space; waste water sprays portion and sprays layer 2 including waste water, and waste water sprays layer 2 and sets up in the first accommodation space of waste water concentration tower 1, and is located between first flue gas entry and the first exhanst gas outlet, and waste water sprays moisture in the 2 spun waste water thick liquids of layer and is treated desulfurization flue gas evaporation absorption, and absorbs treating desulfurization flue gas of moisture and flows from first exhanst gas outlet.
The wastewater treatment system of the embodiment comprises a wastewater concentration tower for performing concentration treatment on the desulfurization wastewater. In the waste water concentration tower, treat that the desulfurization flue gas contacts with the waste water thick liquid that the waste water spray layer sprayed out, realize the heat transfer to evaporate the moisture in the waste water thick liquid into vapor, make these moisture get into with the form of vapor and treat the desulfurization flue gas in, realized the recovery of waste water, reduced the waste of water resource, practiced thrift the resource. In addition, as the water in the wastewater slurry is evaporated, when the concentration of the chloride ions in the wastewater slurry reaches saturation, the chloride ions can be separated out, so that the content of the chloride ions in the wastewater slurry can be reduced, and the corrosivity can be reduced.
As shown in fig. 1, in the present embodiment, the lower portion of the first accommodating space is a wastewater circulating tank, the wastewater spraying portion further includes a wastewater circulating pump 10, and the wastewater circulating pump 10 is connected between the wastewater circulating tank and the wastewater spraying layer 2 and conveys the wastewater slurry in the wastewater circulating tank to the wastewater spraying layer 2.
The waste water circulation pond sets up in waste water concentration tower 1 for the waste water thick liquid that is sprayed by waste water spray layer 2 directly falls to waste water circulation pond after with treat desulfurization flue gas contact, is convenient for collect.
Optionally, in order to improve the durability of the wastewater concentration tower 1, a corrosion-resistant coating is provided at the position of the wastewater circulation tank at the bottom of the wastewater concentration tower 1, so that the corrosion of the wastewater slurry to the wastewater concentration tower 1 is slowed down or avoided, the service life is prolonged, and the cost is reduced.
The wastewater circulating pump 10 is arranged outside the wastewater concentration tower 3 and is used for conveying wastewater slurry at the bottom of the wastewater concentration tower 1 to the wastewater spraying layer 2 at the upper part of the wastewater concentration tower so as to spray the wastewater slurry by the wastewater spraying layer 2.
Because waste water circulating pump 10 sets up outside waste water concentration tower 3, make the pipeline of connecting waste water circulation pond and waste water spray layer 2 more easy to assemble and maintain on the one hand, also more convenient dismantlement when needs are changed, on the other hand makes the waste water thick liquid can dispel the heat outside waste water concentration tower 1 by the in-process of carrying waste water spray layer 2, reduce the temperature of waste water thick liquid, thereby make the heat transfer of treating desulfurization flue gas and waste water thick liquid more abundant, can treat desulfurization flue gas better and cool down, make the temperature of treating desulfurization flue gas that flows from waste water concentration tower 3 lower, like this in follow-up desulfurization treatment process, can reduce treat that desulfurization flue gas evaporates moisture in the desulfurization thick liquid, reduce desulfurization treatment's water consumption, fully water economy resource.
Alternatively, in the present embodiment, the wastewater treatment system includes, in addition to the wastewater concentration tower 1, a desulfurization absorption tower 3, a flue gas dust collector 14, a dehydrator 11, and the like. Of course, in other embodiments, the equipment contained in different wastewater treatment systems may be different according to needs, for example, the wastewater treatment system may only contain the wastewater concentration tower 1, or only contain the wastewater concentration tower 1 and the desulfurization absorption tower 3, or contain other equipment not mentioned above, which is not limited in this embodiment.
Wherein, flue gas dust remover 14 is used for treating the desulfurization flue gas and removes dust, and it is connected with waste water concentration tower 1 and desulfurization absorption tower 3 respectively to carry to treat the desulfurization flue gas to desulfurization absorption tower 3 as required, or carry to treat the desulfurization flue gas to desulfurization absorption tower 3 and waste water concentration tower 1. The flue gas dust collector 14 may be a bag type dust collector, an electrostatic dust collector or other dust collectors as long as it can remove dust particles in the flue gas to be desulfurized.
In this embodiment, the outlet of the flue gas dust collector 14 is connected with an induced draft fan 15, and the induced draft fan 15 is used for driving the flue gas to be desulfurized to flow so as to convey the flue gas to be desulfurized to the desulfurization absorption tower 3 or respectively convey the flue gas to the desulfurization absorption tower 3 and the wastewater concentration tower 1.
As shown in fig. 1, specifically, the outlet of the induced draft fan 15 is connected to the desulfurization absorption tower 3 through a first branch, and the outlet of the induced draft fan 15 is further connected to the wastewater concentration tower 1 through a second branch. In addition, in order to ensure that enough flue gas to be desulfurized enters the wastewater concentration tower 1 when needed, the second branch is also provided with a booster fan 16, and the booster fan 16 is controlled by a control signal and is started when needed to convey part of the flue gas to be desulfurized flowing out of the induced draft fan 15 to the wastewater concentration tower 1.
The flue gas to be desulfurized flowing out of the first flue gas outlet of the wastewater concentration tower 1 is converged into the first branch and enters the desulfurization absorption tower 3, so that sulfides (such as sulfur dioxide) and the like contained in the flue gas are removed in the desulfurization absorption tower 3, and the flue gas becomes clean flue gas which can be discharged and does not pollute the environment and the atmosphere. The desulfurization absorption tower 3 is used for carrying out desulfurization treatment on the flue gas to be desulfurized flowing out of the wastewater concentration tower 1 and/or the flue gas to be desulfurized not passing through the wastewater concentration tower 1.
In the present embodiment, the desulfurization absorption tower 3 includes a second accommodation space and a desulfurization slurry spray layer 4. Desulfurization thick liquid sprays layer 4 and sets up in the second accommodation space, and the second flue gas entry that treats the desulfurization flue gas from first flue gas outlet outflow passes through desulfurization absorption tower 3 gets into the second accommodation space to with the desulfurization thick liquid contact desulfurization after flow out from the second flue gas outlet of desulfurization absorption tower 3.
In this embodiment, the second flue gas inlet is located at the lower part of the desulfurization absorption tower 3, so that the flue gas to be desulfurized enters the second accommodating space; the second flue gas outlet is positioned at the upper part of the desulfurization absorption tower 3 and is used for the desulfurized flue gas to flow out. Desulfurization slurry sprays layer 4 and sets up in the second accommodation space, and the flue gas of treating that gets into from second flue gas entry contacts and the desulfurization back with desulfurization slurry in the second accommodation space, flows from the second exhanst gas outlet of desulfurization absorption tower 3.
Optionally, in this embodiment, the lower portion of the second accommodating space is a desulfurization slurry pool, the desulfurization absorption tower 3 further includes a desulfurization circulating pump 5, and the desulfurization circulating pump 5 connects the desulfurization slurry pool and the desulfurization slurry spray layer 4, and conveys the desulfurization slurry in the desulfurization slurry pool to the desulfurization slurry spray layer 4. The desulfurization circulating pump 5 provides power for the circulation of the desulfurization slurry.
Of course, in other embodiments, the desulfurization slurry pool may be disposed outside the desulfurization absorption tower 3, and the desulfurization circulation pump 5 may also be disposed at a suitable position, which is not limited in this embodiment.
Because the inflow flue gas to be desulfurized comprises the flue gas to be desulfurized which passes through the wastewater concentration tower 1, the overall temperature of the flue gas to be desulfurized is reduced, and the content of water vapor contained in the flue gas to be desulfurized is increased, so that the evaporation of water in the desulfurized slurry can be reduced, and the water consumption is reduced.
Optionally, a defogging dust collector 17 is further arranged in the desulfurization absorption tower 3, the defogging dust collector 17 is arranged between the desulfurization spray layer 4 and the second flue gas outlet, and is used for removing fog drops and dust particles in the desulfurized flue gas, and the desulfurized flue gas flows out from the second flue gas outlet of the desulfurization absorption tower 3 after passing through the defogging dust collector 17 and flows out through a chimney 18.
Optionally, in order to further save water resources, a cooler may be further disposed between the second flue gas outlet and the chimney 18, and the cooler is used to cool the desulfurized clean flue gas, so that water vapor therein is condensed and separated out, and the water resources are recovered, thereby reducing the content of water vapor in the gas discharged from the chimney 18, realizing "white smoke" elimination of the discharged gas, and also reducing corrosion to the chimney 18.
When the content of chloride ions in the desulfurization slurry in the desulfurization absorption tower 3 is high (for example, exceeds a certain threshold value) or after the desulfurization slurry is recycled for a period of time, a part of water in the desulfurization slurry can be discharged to form desulfurization waste water, and new water is supplemented into the desulfurization slurry, so that the concentration of the chloride ions and the solid content in the desulfurization slurry are reduced.
In this embodiment, the discharged desulfurization wastewater is collected and delivered to the wastewater concentration tower 1 for wastewater concentration, so that the wastewater is returned to the flue gas to be desulfurized in the form of water vapor, thereby realizing zero emission of the desulfurization wastewater. It should be noted that zero discharge in this embodiment means that the wastewater recovery rate is greater than or equal to a preset recovery threshold, for example, greater than or equal to 90%. The preset reclamation thresholds may be different for different usage scenarios.
Specifically, as shown in fig. 1, the wastewater treatment system further includes a wastewater conveying portion, the wastewater conveying portion is connected to the wastewater concentration tower 1, and is used for pretreating desulfurization wastewater to form wastewater slurry, conveying the wastewater slurry to the wastewater concentration tower 1, and spraying through the wastewater spraying layer 2.
Optionally, the wastewater conveying part comprises a wastewater cyclone 6, and the wastewater cyclone 6 pretreats the desulfurization wastewater to separate a wastewater slurry and an underflow 7 and conveys the wastewater slurry to the wastewater concentration tower 1. The wastewater cyclone 6 pretreats the desulfurization wastewater in a cyclone mode to primarily separate solids from liquids, and the underflow 7 can be conveyed to other equipment for appropriate treatment. The wastewater slurry is conveyed to a wastewater concentration tower 1 for treatment.
Optionally, the wastewater conveying part further comprises a wastewater buffer container 8 and a wastewater conveying pump 9 connected between the wastewater cyclone 6 and the wastewater concentrating tower 1, the wastewater buffer container 8 is used for containing wastewater slurry flowing out of the wastewater cyclone 6, and the wastewater conveying pump 9 conveys the wastewater slurry in the wastewater buffer container 8 to the wastewater concentrating tower 1.
The wastewater buffer vessel 8 is used to hold the wastewater slurry for transfer to the wastewater concentration tower 1 when necessary. In order to prevent clogging due to solids deposition, an agitation mechanism is provided in the wastewater buffer vessel 8 for agitating the wastewater slurry therein.
The wastewater transfer pump 9 is used to power the transfer of wastewater slurry to transfer the wastewater slurry from the wastewater buffer vessel 8 to the wastewater thickening tower 1 when needed.
For the waste water thick liquid that gets into in waste water concentration tower 1, as before, it is sprayed by waste water spraying layer 2 to in the in-process that falls carries out the heat transfer with waiting to desulfurated flue gas, make the moisture evaporation wherein get into in waiting to desulfurated flue gas, later, waste water thick liquid falls back to waste water concentration tower 1 bottom, is carried waste water by waste water circulating pump 10 again and sprays layer 2 and spray, so reciprocal realization is concentrated.
Since the water content in the wastewater slurry is gradually evaporated and the solid content therein becomes higher and higher, in order to reduce the clogging of the wastewater slurry due to the increase of the solid content in the concentration process, the wastewater treatment system further includes a dewatering section which draws the wastewater slurry out of the wastewater concentration tower 1, separates the filtrate 12 from the wastewater slurry, and conveys the filtrate 12 into the wastewater concentration tower 1. The dehydration part is used for realizing solid-liquid separation of the wastewater slurry, the separated solid forms slurry cakes for subsequent use, the liquid forms filtrate 12 and is conveyed back to the wastewater concentration tower 1, and zero discharge of wastewater is realized.
Alternatively, in the present embodiment, the dewatering section includes a dewatering machine 11 and a wastewater dewatering pump 13, the wastewater dewatering pump 13 is connected between the dewatering machine 11 and the wastewater concentration tower 1, and is activated when it is determined that the solid content of the wastewater slurry in the wastewater concentration tower 1 is greater than or equal to a set value, the wastewater slurry is pumped out of the wastewater concentration tower 1 and conveyed to the dewatering machine 11, and the dewatering machine 11 separates the filtrate 12 from the wastewater slurry.
The dehydrator 11 may be any device capable of performing solid-liquid separation, and this embodiment is not limited thereto.
Alternatively, in the case where the content of solid, i.e., solid particles, of the wastewater slurry is 2% to 3% in general, and the water content of the wastewater slurry is continuously evaporated in the wastewater concentration tower 1, the solid content of the wastewater slurry is gradually increased, so that the wastewater slurry is thickened, and therefore, the power required for conveying the wastewater slurry is increased, and if the solid content of the wastewater slurry is too high, a pipeline may be blocked, in order to solve this problem and to improve the degree of automation, the dewatering section is connected between the dewatering machine 11 and the wastewater concentration tower 1 using the wastewater dewatering pump 13, and when it is determined that the solid content of the wastewater slurry in the wastewater concentration tower 1 is greater than or equal to a set value, the wastewater dewatering pump 13 is started to pump the wastewater slurry out of the wastewater concentration tower 1 and convey the wastewater slurry to the dewatering machine 11, and the dewatering machine 11 separates the filtrate 12 from the wastewater slurry.
Those skilled in the art can select an appropriate value as the setting value according to the requirement, for example, the setting value is 12% in the embodiment, and of course, the setting value can be 10%, 15%, etc. in other embodiments. When the solid content is equal to or more than the set value, the wastewater dewatering pump 13 pumps the wastewater slurry in the wastewater concentration tower 1 and conveys the wastewater slurry to the dewatering machine 11 for solid-liquid separation treatment.
One skilled in the art can determine whether the solid content in the wastewater slurry is greater than or equal to the set value based on empirical values to determine whether to activate the wastewater dewatering pump 13. For example, the time required for the solid content of the wastewater slurry to be greater than or equal to the set value is determined based on the flow velocity of the flue gas to be desulfurized, the temperature, and the initial solid content in the wastewater slurry, and the wastewater dewatering pump 13 is periodically started based on the required time. Alternatively, a sensor may be provided in the wastewater circulation tank, and the solid content of the wastewater slurry may be detected in real time by the sensor, and the wastewater dewatering pump 13 may be started when the solid content is greater than or equal to a set value. Alternatively, the solid content in the wastewater slurry is determined in other suitable manners, and it is determined whether to start the wastewater dewatering pump 13 according to the solid content.
As shown in FIG. 1, the operation of the wastewater treatment system is as follows:
the flue gas to be desulfurized is driven by a draught fan 15 to be dedusted by a flue gas deduster 14, part of the dedusted flue gas to be desulfurized directly enters a desulfurization absorption tower 3, and the other part of the dedusted flue gas enters a wastewater concentration tower 1. In the wastewater concentration tower 1, a wastewater circulating pump 10 conveys wastewater slurry in a wastewater circulating pool to a wastewater spraying layer 2, the wastewater spraying layer is used for spraying, the flue gas to be desulfurized is in contact with the sprayed wastewater slurry and exchanges heat, the moisture in the wastewater slurry is evaporated, and then the evaporated steam and the flue gas to be desulfurized enter a desulfurization absorption tower 3 together. In the desulfurization absorption tower 3, the flue gas to be desulfurized reacts with the desulfurization slurry for desulfurization, and the desulfurized flue gas passes through the demisting dust remover 17 to form clean flue gas and is discharged through the chimney 18.
After the desulfurization slurry circulates in the desulfurization absorption tower 3 for a certain period of time, since the concentration of chloride ions therein increases, it is necessary to discharge a part of the wastewater and replenish new moisture to reduce the concentration of chloride ions. The discharged wastewater enters a wastewater cyclone 6, solid-liquid separation is carried out to form a bottom flow 7 and wastewater slurry, the bottom flow 7 is discharged, and the wastewater slurry enters a wastewater buffer container 8 for storage.
The wastewater delivery pump 9 delivers the wastewater slurry in the wastewater buffer container 8 to the wastewater circulation tank of the wastewater concentration tower 1 at regular time or under the control of a control signal.
When the solid content in the wastewater slurry reaches a set value, the wastewater slurry is pumped out of the wastewater concentration tower 1 by the wastewater dewatering pump 13 and conveyed to the dewatering machine 11, the wastewater slurry is dewatered by the dewatering machine 11 to form a solid cake and a liquid filtrate 12, and the filtrate 12 is conveyed back to the wastewater concentration tower 1. Since the water content in the wastewater slurry is reduced, some chloride ions are precipitated into a solid state, and therefore, the chloride ion content in the returned filtrate 12 is reduced, thereby realizing the recycling of wastewater, reducing the water resource consumption, and reducing corrosion.
Those of ordinary skill in the art will appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present embodiments.
The above embodiments are only used for illustrating the embodiments of the present invention, and are not intended to limit the embodiments of the present invention, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention, and therefore all equivalent technical solutions also belong to the scope of the embodiments of the present invention, and the scope of patent protection of the embodiments of the present invention should be defined by the claims.
Claims (10)
1. A wastewater treatment system, comprising:
the waste water concentration tower (1), the waste water concentration tower (1) comprises a first accommodating space, a first flue gas inlet and a first flue gas outlet, and the first flue gas inlet and the first flue gas outlet are both communicated with the first accommodating space;
waste water spraying portion, waste water spraying portion includes that waste water sprays layer (2), waste water sprays layer (2) and sets up in the first accommodation space of waste water concentration tower (1), and be located first flue gas entry with between the first exhanst gas outlet, waste water sprays moisture in layer (2) spun waste water thick liquid and is treated desulfurization flue gas evaporation absorption, and absorbs treating of moisture and follow first exhanst gas outlet flows.
2. The wastewater treatment system according to claim 1, further comprising a desulfurization absorption tower (3), wherein the desulfurization absorption tower (3) comprises a second accommodating space and a desulfurization slurry spraying layer (4), the desulfurization slurry spraying layer (4) is arranged in the second accommodating space, and the flue gas to be desulfurized, which flows out from the first flue gas outlet, enters the second accommodating space through a second flue gas inlet of the desulfurization absorption tower (3), and flows out from a second flue gas outlet of the desulfurization absorption tower (3) after being contacted with the desulfurization slurry for desulfurization.
3. The wastewater treatment system according to claim 2, wherein the lower part of the second containing space is a desulfurization slurry pond, and the desulfurization absorption tower (3) further comprises a desulfurization circulating pump (5), wherein the desulfurization circulating pump (5) connects the desulfurization slurry pond and the desulfurization slurry spray layer (4) and conveys the desulfurization slurry in the desulfurization slurry pond to the desulfurization slurry spray layer (4).
4. The wastewater treatment system according to claim 1, further comprising a wastewater delivery section connected to the wastewater concentration tower (1) for pretreating desulfurization wastewater to form wastewater slurry and delivering the wastewater slurry into the wastewater concentration tower (1) to be sprayed through the wastewater spray layer (2).
5. The wastewater treatment system according to claim 4, wherein the wastewater transport section comprises a wastewater cyclone (6), the wastewater cyclone (6) pre-treating the desulfurized wastewater to separate a wastewater slurry and an underflow (7) and transporting the wastewater slurry to the wastewater concentration column (1).
6. The wastewater treatment system according to claim 5, wherein the wastewater conveying part further comprises a wastewater buffer container (8) and a wastewater conveying pump (9) connected between the wastewater cyclone (6) and the wastewater concentration tower (1), the wastewater buffer container (8) is used for containing wastewater slurry flowing out of the wastewater cyclone (6), and the wastewater conveying pump (9) conveys the wastewater slurry in the wastewater buffer container (8) to the wastewater concentration tower (1).
7. The wastewater treatment system according to claim 1, wherein the lower part of the first containing space is a wastewater circulating tank, the wastewater spraying part further comprises a wastewater circulating pump (10), and the wastewater circulating pump (10) is connected between the wastewater circulating tank and the wastewater spraying layer (2) and conveys wastewater slurry in the wastewater circulating tank to the wastewater spraying layer (2).
8. The wastewater treatment system according to claim 1, further comprising a dewatering section that draws a wastewater slurry from the wastewater concentration tower (1) and separates a filtrate (12) from the wastewater slurry, the filtrate (12) being transported to the wastewater concentration tower (1).
9. The wastewater treatment system according to claim 8, wherein the dewatering section comprises a dewatering machine (11) and a wastewater dewatering pump (13), the wastewater dewatering pump (13) is connected between the dewatering machine (11) and the wastewater concentration tower (1), and is activated when it is determined that a solid content of wastewater slurry in the wastewater concentration tower (1) is equal to or greater than a set value, the wastewater slurry is pumped out of the wastewater concentration tower (1) and conveyed to the dewatering machine (11), and the dewatering machine (11) separates filtrate (12) from the wastewater slurry.
10. The wastewater treatment system according to claim 2, further comprising a flue gas dust collector (14) for dedusting the flue gas to be desulfurized, wherein the flue gas dust collector (14) is connected with the wastewater concentration tower (1) and the desulfurization absorption tower (3), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920689401.0U CN210206367U (en) | 2019-05-14 | 2019-05-14 | Wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920689401.0U CN210206367U (en) | 2019-05-14 | 2019-05-14 | Wastewater treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210206367U true CN210206367U (en) | 2020-03-31 |
Family
ID=69925999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920689401.0U Active CN210206367U (en) | 2019-05-14 | 2019-05-14 | Wastewater treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210206367U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075668A (en) * | 2019-05-14 | 2019-08-02 | 北京中能诺泰节能环保技术有限责任公司 | Wastewater Treatment System |
-
2019
- 2019-05-14 CN CN201920689401.0U patent/CN210206367U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110075668A (en) * | 2019-05-14 | 2019-08-02 | 北京中能诺泰节能环保技术有限责任公司 | Wastewater Treatment System |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101417827B (en) | Technique method for processing desulphurization waste water | |
| CN101417826B (en) | Method and system for processing desulphurization waste water | |
| WO2018040852A1 (en) | System and method for treating desulfurization wastewater using flue gas waste heat | |
| CN209974506U (en) | Wet flue gas desulfurization waste water concentration decrement system | |
| CN100534587C (en) | Sintering smoke wet method sulphur removing and dust removing technology | |
| CN107032428B (en) | System and method for zero emission treatment of undersaturated flue gas concentration crystallization desulfurization wastewater | |
| RU2459655C2 (en) | Device and method of smoke fumes | |
| CN107954560A (en) | The technique that vapor recompression is concentrated by evaporation joint flue spray technique processing waste water | |
| JPS61178022A (en) | Simultaneous treatment of so2, so3 and dust | |
| CN110862118A (en) | Wastewater zero discharge system and method for multi-stage treatment | |
| CN206580583U (en) | FGD wastewater zero discharge systems | |
| CN110723858A (en) | Desulfurization wastewater zero-discharge treatment system and treatment process | |
| CN105457479B (en) | A kind of flue gas desulfurization zero-emission resource processing system and method | |
| CN109111009A (en) | A kind of desulfurization wastewater technique of zero discharge and device | |
| CN206940653U (en) | Desulphurization for Coal-fired Power Plant waste water zero discharge device | |
| CN109395568A (en) | A kind of low water consumption wet desulphurization method | |
| CN111252993A (en) | System and method for evaporating and concentrating desulfurization wastewater by using flue gas waste heat | |
| CN210206367U (en) | Wastewater treatment system | |
| CN101829489A (en) | Ammonia-plaster mode desulphurization system | |
| CN205115086U (en) | Handle device of desulfurization waste water | |
| CN106865667A (en) | A kind of desulfurization wastewater fume afterheat concentrates abatement system and its technique | |
| CN205973869U (en) | System for with surplus thermal treatment desulfurization waste water of flue gas | |
| CN211358336U (en) | High-efficient deacidification smoke abatement device of industrial exhaust environmental protection | |
| CN113277663A (en) | Desulfurization wastewater zero-discharge treatment process | |
| CN210171208U (en) | Electrolytic aluminum flue gas deep purification device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |