CN116675361A - Desulfurization wastewater treatment system - Google Patents
Desulfurization wastewater treatment system Download PDFInfo
- Publication number
- CN116675361A CN116675361A CN202310119654.5A CN202310119654A CN116675361A CN 116675361 A CN116675361 A CN 116675361A CN 202310119654 A CN202310119654 A CN 202310119654A CN 116675361 A CN116675361 A CN 116675361A
- Authority
- CN
- China
- Prior art keywords
- desulfurization wastewater
- desulfurization
- thickener
- flash
- 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.)
- Pending
Links
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 178
- 230000023556 desulfurization Effects 0.000 title claims abstract description 178
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 30
- 239000002351 wastewater Substances 0.000 claims abstract description 163
- 239000002910 solid waste Substances 0.000 claims abstract description 22
- 239000012141 concentrate Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000002562 thickening agent Substances 0.000 claims description 75
- 238000001704 evaporation Methods 0.000 claims description 36
- 230000008020 evaporation Effects 0.000 claims description 35
- 238000004891 communication Methods 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000008719 thickening Effects 0.000 claims description 15
- 238000005119 centrifugation Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 238000007701 flash-distillation Methods 0.000 abstract 1
- 238000011282 treatment Methods 0.000 description 9
- 239000007787 solid Substances 0.000 description 6
- 239000010802 sludge Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
Abstract
The invention provides a desulfurization wastewater treatment system, which comprises a first heat exchanger, a concentration assembly, a dryer and a centrifuge. The first heat exchanger is used for obtaining desulfurization waste water and heating up desulfurization waste water, and the concentrated subassembly is connected with the first heat exchanger to receive desulfurization waste water after the heating up, and flash distillation is carried out to desulfurization waste water at least in order to concentrate desulfurization waste water, and the desicator is connected with the concentrated subassembly, in order to receive desulfurization waste water after concentrating and dry, and centrifuge intercommunication desicator is in order to receive desulfurization waste water after drying and centrifugal. According to the desulfurization wastewater treatment system disclosed by the invention, desulfurization wastewater is concentrated through the concentration component, the concentrated desulfurization wastewater is dried through the dryer, and finally the dried desulfurization wastewater is separated through the centrifugal machine to generate solid waste, so that the desulfurization wastewater is treated, and the desulfurization wastewater treatment system is simple in structure and reduces the occupied area.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a desulfurization wastewater treatment system.
Background
The desulfurization wastewater is mainly the water discharged from an absorption tower in the wet desulfurization process of boiler flue gas. In the related art, the desulfurization wastewater is sequentially subjected to the steps of oxidization, neutralization, precipitation, flocculation, concentration/clarification aiming at the desulfurization wastewater treatment system so as to realize the wastewater treatment of the desulfurization wastewater. However, such a treatment system requires the provision of a plurality of tanks to accommodate the desulfurization wastewater in the corresponding steps and to perform the corresponding treatments, and the addition of chemicals corresponding to the steps to perform oxidation, neutralization and flocculation reactions during the treatment. Therefore, the treatment system for desulfurization wastewater in the related art has the problems of large occupied area and complex structure.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a desulfurization wastewater treatment system, which is characterized in that desulfurization wastewater is concentrated through a concentration component, the concentrated desulfurization wastewater is dried through a dryer, and finally the dried desulfurization wastewater is separated through a centrifuge to generate solid waste, so that the desulfurization wastewater is treated, and the desulfurization wastewater treatment system is simple in structure and reduces the occupied area.
The desulfurization wastewater treatment system of the embodiment of the invention comprises:
the first heat exchanger is used for obtaining desulfurization wastewater and heating the desulfurization wastewater;
the concentrating component is communicated with the first heat exchanger to receive the desulfurization wastewater after temperature rise and flash at least to concentrate the desulfurization wastewater;
the dryer is communicated with the concentration assembly to receive the concentrated desulfurization wastewater and dry the desulfurization wastewater;
and the centrifugal machine is communicated with the dryer to receive the dried desulfurization wastewater and perform centrifugation.
The sulfur wastewater treatment system of the embodiment of the invention concentrates the desulfurization wastewater through the concentration component, then dries the concentrated desulfurization wastewater through the dryer, and finally separates the dried desulfurization wastewater through the centrifuge to generate solid waste, thereby realizing the treatment of the desulfurization wastewater.
In some embodiments, the concentrating assembly comprises:
the first flash evaporator is communicated with the first heat exchanger to receive the desulfurization wastewater after temperature rise and perform primary flash evaporation on the desulfurization wastewater;
the thickener is communicated with the first flash evaporator so as to receive the desulfurization wastewater after primary flash evaporation, and the dryer is communicated with the thickener so as to obtain the desulfurization wastewater discharged by the thickener.
In some embodiments, the concentrating assembly further comprises:
the second flash evaporator is communicated between the first flash evaporator and the thickener, so as to receive the desulfurization wastewater subjected to primary flash evaporation, perform secondary flash evaporation and feed the desulfurization wastewater subjected to secondary flash evaporation into the thickener.
In some embodiments, the concentrating assembly further comprises:
a first circulation pump having a first inlet, a first outlet and a second outlet, the first inlet communicating with the first flash evaporator to obtain the desulfurization wastewater after one flash evaporation, the first outlet communicating with the first flash evaporator to return a part of the desulfurization wastewater after one flash evaporation to the first flash evaporator, the second outlet communicating with the second flash evaporator to supply another part of the desulfurization wastewater after one flash evaporation to the second flash evaporator;
a second circulation pump having a second inlet, a third outlet and a fourth outlet, the second inlet communicating with the second flash evaporator to obtain the desulfurization wastewater after the secondary flash evaporation, the third outlet communicating with the second flash evaporator to return a part of the desulfurization wastewater after the secondary flash evaporation to the second flash evaporator, the fourth outlet communicating with the thickener to feed another part of the desulfurization wastewater after the secondary flash evaporation to the thickener;
a third circulation pump having a third inlet, a fifth outlet and a sixth outlet, the third inlet communicating with the thickener to obtain the desulfurization waste water discharged from the thickener, the fifth outlet communicating with the thickener to return a part of the desulfurization waste water discharged from the thickener to the thickener, and the sixth outlet communicating with the dryer to supply another part of the desulfurization waste water discharged from the thickener to the dryer.
In some embodiments, the concentrating assembly further comprises a first vapor vent tube, a desuperheater, and a condensate tank, the first vapor vent tube communicating between the thickener and the condensate tank, the desuperheater disposed on the first vapor vent tube.
In some embodiments, the dryer has a first space in communication between the thickening assembly and the centrifuge and a second space in communication with a source of thermal medium, the thermal medium in the second space being in thermal communication with the desulfurization waste water in the first space to dry the desulfurization waste water in the first space.
In some embodiments, the second space communicates with the condensing assembly to supply the heat medium passing through the heat transfer in the second space to the condensing assembly.
In some embodiments, the first heat exchanger has a third space for taking the desulfurization waste water and a fourth space in communication with the concentrating assembly and/or the dryer for taking the vapor exiting the concentrating assembly and/or the dryer, the desulfurization waste water in the third space and the vapor in the fourth space being heat exchangeable.
In some embodiments, the centrifuge has a seventh outlet in communication with the thickening assembly to feed centrifugally generated clean water to the thickening assembly and an eighth outlet for discharging centrifugally generated solid waste out of the centrifuge.
In some embodiments, the desulfurization wastewater treatment system further comprises a solid waste tank in communication with the eighth outlet to receive and store the solid waste.
Drawings
FIG. 1 is a schematic diagram of a desulfurization wastewater treatment system according to an embodiment of the present invention;
fig. 2 is a schematic view of the structure of the concentrating assembly of fig. 1.
Reference numerals:
1. a first heat exchanger; 2. a concentrating assembly; 21. a first flash; 22. a thickener; 23. a second flash evaporator; 24. a first circulation pump; 25. a second circulation pump; 26. a third circulation pump; 27. a first steam discharge pipe; 28. a cooler; 29. a condensation tank; 3. a dryer; 4. a centrifuge; 5. and (5) fixing a waste pool.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A desulfurization wastewater treatment system according to an embodiment of the invention is described below with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the desulfurization wastewater treatment system of the embodiment of the present invention includes a first heat exchanger 1, a concentration assembly 2, a dryer 3, and a centrifuge 4.
The first heat exchanger 1 is used for obtaining desulfurization waste water and heating the desulfurization waste water. The concentrating assembly 2 is communicated with the first heat exchanger 1 to receive the desulfurization wastewater after temperature rise and flash-evaporating at least the desulfurization wastewater to concentrate the desulfurization wastewater. The dryer 3 communicates with the concentrating module 2 to receive the concentrated desulfurization wastewater and dry. The centrifuge 4 communicates with the dryer 3 to receive the dried desulfurization wastewater and perform centrifugation.
As shown in fig. 1, the desulfurization waste water is first heated to a temperature close to or reaching a boiling point by the first heat exchanger 1, then enters the concentration assembly 2 through a pipeline, the concentration assembly 2 at least comprises the first flash evaporator 21 so as to flash-evaporate the heated desulfurization waste water by the first flash evaporator 21, thereby concentrating the heated desulfurization waste water, the concentrated desulfurization waste water enters the dryer 3 through the pipeline, the dryer 3 dries the concentrated desulfurization waste water, the dried desulfurization waste water is in a sludge state, the dried desulfurization waste water enters the centrifugal machine 4 through the pipeline, and the separation of solids and liquid is realized under the centrifugal action of the centrifugal machine 4 so as to separate the water in the sludge desulfurization waste water, thereby generating solid waste and completing the treatment of the desulfurization waste water.
The sulfur wastewater treatment system of the embodiment of the invention concentrates the desulfurization wastewater through the concentration component, then dries the concentrated desulfurization wastewater through the dryer, and finally separates the dried desulfurization wastewater through the centrifuge to generate solid waste, thereby realizing the treatment of the desulfurization wastewater. In addition, the sulfur wastewater treatment system only generates clear water and solid waste in the treatment process, does not generate water with any adverse effect on the environment, and realizes zero emission of desulfurization wastewater.
In some embodiments, the thickening assembly 2 includes a first flash 21 and a thickener 22. The first flash evaporator 21 is communicated with the first heat exchanger 1 to receive the desulfurization waste water after the temperature rise and perform primary flash evaporation on the desulfurization waste water. The thickener 22 communicates with the first flash evaporator 21 to receive the desulfurization wastewater after one flash evaporation, and the dryer 3 communicates with the thickener 22 to obtain the desulfurization wastewater discharged from the thickener 22.
As shown in fig. 2, the concentrating module 2 includes a first flash evaporator 21 and a thickener 22, the desulfurization waste water discharged from the first heat exchanger 1 after temperature rise enters the first flash evaporator 21 through a pipe to be subjected to primary flash evaporation, and primary concentrated desulfurization waste water and steam are generated, the primary concentrated desulfurization waste water enters the thickener 22 through a pipe, concentration of solid particles and sedimentation of suspended solids are realized in the thickener 22, the desulfurization waste water is further concentrated, and the thickener 22 supplies the concentrated desulfurization waste water to the dryer 3 through a pipe.
It is to be understood that the configuration of the thickening assembly is not limited to having a first flash vessel and a thickener, and in other embodiments, the thickening assembly has a first flash vessel but no thickener.
In some embodiments, the concentrating assembly 2 further comprises a second flash vessel 23, the second flash vessel 23 being in communication between the first flash vessel 21 and the thickener 22 to receive the primary flashed desulfurization wastewater and to perform a secondary flash, and to feed the secondary flashed desulfurization wastewater to the thickener 22.
As shown in fig. 2, the first flash evaporator 21, the second flash evaporator 23 and the thickener 22 are sequentially connected, the primary concentrated desulfurization wastewater generated by the first flash evaporator 21 enters the second flash evaporator 23 through a pipeline and is subjected to secondary flash evaporation in the second flash evaporator 23 to generate secondary concentrated desulfurization wastewater and steam, the secondary concentrated desulfurization wastewater is supplied to the thickener 22 through a pipeline, and concentration of solid particles and sedimentation of suspended solids are realized in the thickener 22.
In some embodiments, the concentrating assembly 2 further comprises a first circulation pump 24, a second circulation pump 25, and a third circulation pump 26.
The first circulation pump 24 has a first inlet, a first outlet, and a second outlet, the first inlet being communicated with the first flash evaporator 21 to obtain desulfurization waste water after one flash evaporation, the first outlet being communicated with the first flash evaporator 21 to return a part of the desulfurization waste water after one flash evaporation to the first flash evaporator 21, the second outlet being communicated with the second flash evaporator 23 to supply another part of the desulfurization waste water after one flash evaporation to the second flash evaporator 23.
Specifically, as shown in fig. 2, the first flash evaporator 21 has an inlet at the top and a waste water outlet at the bottom, the second flash evaporator 23 also has an inlet at the top and a waste water outlet at the bottom, the first circulation pump 24 is located between the first flash evaporator 21 and the second flash evaporator 23, the first inlet of the first circulation pump 24 is communicated with the waste water outlet of the first flash evaporator 21 through a pipe, the second outlet of the first circulation pump 24 is communicated with the inlet of the second flash evaporator 23 through a pipe, thereby pumping a part of the primarily concentrated desulfurization waste water discharged from the waste water outlet of the first flash evaporator 21 into the second flash evaporator 23 for secondary flash evaporation, and the first outlet of the first circulation pump 24 is communicated with the inlet of the first flash evaporator 21 through a pipe to return another part of the primarily concentrated desulfurization waste water discharged from the waste water outlet of the first flash evaporator 21 into the first flash evaporator 21 to repeat the flash evaporation, thereby enhancing the effect of the primary flash evaporator 21 to concentrate desulfurization waste water.
The second circulation pump 25 has a second inlet communicating with the second flash evaporator 23 to obtain desulfurization wastewater after the secondary flash evaporation, a third outlet communicating with the second flash evaporator 23 to return a part of the desulfurization wastewater after the secondary flash evaporation to the second flash evaporator 23, and a fourth outlet communicating with the thickener 22 to supply another part of the desulfurization wastewater after the secondary flash evaporation to the thickener 22.
Specifically, as shown in fig. 2, the thickener 22 has an inlet at the top and a wastewater outlet at the bottom, the second circulation pump 25 is located between the second flash evaporator 23 and the thickener 22, the second inlet of the second circulation pump 25 is communicated with the wastewater outlet of the second flash evaporator 23 through a pipe, the fourth outlet of the second circulation pump 25 is communicated with the inlet of the thickener 22 through a pipe, thereby pumping a part of the secondarily concentrated desulfurization wastewater discharged from the wastewater outlet of the second flash evaporator 23 into the thickener 22 for sedimentation and concentration, and the third outlet of the second circulation pump 25 is communicated with the inlet of the second flash evaporator 23 through a pipe to pump the other part of the secondarily concentrated desulfurization wastewater discharged from the wastewater outlet of the second flash evaporator 23 back into the second flash evaporator 23 for repeated secondary flash evaporation, thereby improving the effect of concentrating desulfurization wastewater by the second flash evaporator 23.
The third circulation pump 26 has a third inlet communicating with the thickener 22 to obtain the desulfurization waste water discharged from the thickener 22, a fifth outlet communicating with the thickener 22 to return a part of the desulfurization waste water discharged from the thickener 22 to the thickener 22, and a sixth outlet communicating with the dryer 3 to supply another part of the desulfurization waste water discharged from the thickener 22 to the dryer 3.
Specifically, as shown in fig. 1 and 2, the thickener 22 settles and concentrates the secondarily concentrated desulfurization wastewater and generates thirdly concentrated desulfurization wastewater, preferably in the form of sludge. The third circulation pump 26 is located between the thickener 22 and the dryer 3, the third inlet of the third circulation pump 26 is communicated with the waste water outlet of the thickener 22 through a pipe, the sixth outlet of the third circulation pump 26 is communicated with the dryer 3 through a pipe, so that a part of the tertiary concentrated desulfurization waste water discharged from the waste water outlet of the thickener 22 is pumped into the dryer 3 for drying, the fifth outlet of the third circulation pump 26 is communicated with the inlet of the thickener 22 through a pipe, so that the other part of the tertiary concentrated desulfurization waste water discharged from the waste water outlet of the thickener 22 is pumped back into the thickener 22 for repeated sedimentation and concentration, and the effect of concentrating the desulfurization waste water by the thickener 22 is improved.
It will be appreciated that the configuration of the thickening assembly is not limited to that shown in fig. 2, and in other embodiments the thickening assembly has only one circulation pump with an inlet in communication with the thickener, one outlet in communication with the dryer, and another outlet in communication with the inlet of the first flash vessel.
In some implementations, the concentrating assembly 2 further includes a first vapor discharge pipe 27, a desuperheater 28, and a condensate tank 29, the first vapor discharge pipe 27 communicating between the thickener 22 and the condensate tank 29, the desuperheater 28 being disposed on the first vapor discharge pipe 27.
As shown in fig. 2, the inlet end of the first steam discharge pipe 27 is communicated with the thickener 22 to discharge the steam in the thickener 22, the desuperheater 28 is arranged on the first steam discharge pipe 27 to desuperheat and condense the steam in the first steam discharge pipe 27 into liquid, the outlet end of the first steam discharge pipe 27 is communicated with the condensation water tank 29, and the condensed liquid is fed into the condensation water tank 29 for storage. Preferably, the desuperheater 28 is a second heat exchanger and the medium fed into the second heat exchanger and exchanging heat with steam is tap water.
It will be appreciated that the configuration of the thickening assembly is not limited to that shown in fig. 2, and in other embodiments the thickening assembly does not have a first vapor discharge tube, a desuperheater, and a condensate tank, and that the vapor within the thickener is vented directly to the atmosphere.
In some embodiments, the dryer 3 has a first space in communication between the thickening assembly 2 and the centrifuge 4 and a second space in communication with a source of thermal medium, the thermal medium in the second space being in thermal communication with the desulfurization waste water in the first space to dry the desulfurization waste water in the first space.
As shown in fig. 1, the dryer 3 is preferably a blade dryer, the blade dryer has a cylindrical first space and a cylindrical second space, the cylindrical first space is coaxially arranged with the cylindrical second space, the cylindrical first space is sleeved on the periphery of the cylindrical second space, the cylindrical second space is communicated with a heat medium source through a pipeline, the cylindrical first space is respectively communicated with the thickener 22 and the centrifuge 4 through a pipeline and is positioned between the thickener 22 and the centrifuge 4, the three-time concentrated desulfurization wastewater discharged by the thickener 22 enters the cylindrical first space through the pipeline, the heat of the heat medium in the second space is higher than the heat of the three-time concentrated desulfurization wastewater in the first space, so that the heat of the heat medium is transferred into the first space to evaporate and dry the three-time concentrated desulfurization wastewater, the dried desulfurization wastewater is discharged from the dryer 3 and is in a sludge state, and the dried desulfurization wastewater and the three-time concentrated desulfurization wastewater are in a sludge state, but the dried desulfurization wastewater is more dry than the three-time concentrated desulfurization wastewater. Preferably, the desulfurization wastewater treatment system is applied to a power plant, the heat medium source is a hot water tank, and the hot water generated by using the waste heat of the power plant is stored in the hot water tank, in other words, the heat medium is the hot water generated by using the waste heat of the power plant.
It will be appreciated that the first cylindrical space is not limited to being in communication with a thickener, and in other embodiments the thickening assembly has a first flash without a thickener, where the first cylindrical space is in communication with the first flash.
In some embodiments, the second space communicates with the concentrating assembly 2 to supply the heat medium, which is subjected to heat transfer, in the second space to the concentrating assembly 2.
As shown in fig. 1, the cylindrical second space is communicated with the inlet of the first flash evaporator 21 through a pipeline so as to supply the hot water subjected to heat transfer into the first flash evaporator 21 for use, thereby avoiding the waste caused by direct discharge of the hot water subjected to heat transfer from the dryer.
In some embodiments, the first heat exchanger 1 has a third space for taking the desulfurization waste water and a fourth space in communication with the concentrating module 2 and/or the dryer 3 to take the vapor discharged from the concentrating module 2 and/or the dryer 3, and the desulfurization waste water in the third space and the vapor in the fourth space can be heat exchanged.
As shown in fig. 1, the cylindrical second space of the dryer 3 has steam therein, and is communicated with the fourth space of the first heat exchanger 1 through a pipe so as to supply the steam in the second space into the fourth space of the first heat exchanger 1, and the first flash evaporator 21 and the second flash evaporator 22 are respectively communicated with the fourth space of the first heat exchanger 1 through pipes so as to supply the steam generated by the first flash evaporator 21 at the time of primary flash evaporation and the steam generated by the second flash evaporator 22 at the time of secondary flash evaporation into the fourth space. The desulfurization waste water enters the third space of the first heat exchanger 1 and exchanges heat with steam in the fourth space to heat the desulfurization waste water in the third space to be close to or reach the boiling point, and the third space is communicated with the inlet of the first flash evaporator 21 through a pipeline to supply the heated desulfurization waste water into the first flash evaporator 21 for primary flash evaporation. The fourth space is communicated with the condensing tank through a pipeline, and steam in the fourth space is condensed into hot water after heat exchange and is supplied into the condensing tank to be used as process water or power plant water supplementing. Preferably, the first heat exchanger 1 is a fin tube heat exchanger or a plate heat exchanger.
The heat exchange between the steam generated by the concentration assembly and the dryer and the desulfurization wastewater realizes the recycling of heat, and the waste of energy caused by the direct discharge of the steam generated by the concentration assembly and the dryer is avoided.
In some embodiments, the centrifuge 4 has a seventh outlet in communication with the thickening assembly 2 to feed the centrifugally generated clean water to the thickening assembly 2 and an eighth outlet for discharging centrifugally generated solid waste out of the centrifuge 4.
As shown in fig. 1, the centrifuge 4 has a seventh outlet at the top and an eighth outlet at the bottom, the dryer 3 is communicated with the inlet of the centrifuge 4 through a pipeline, so that the dried desulfurization waste water enters the centrifuge 4, the dried desulfurization waste water is separated from solids and liquids under the centrifugal action of the centrifuge 4, so that the moisture in the sludge-like desulfurization waste water is separated, solid waste is generated, the separated supernatant is supplied into the first flash evaporator 21 from the seventh outlet for use, and the solid waste is discharged from the eighth outlet of the centrifuge 4. Preferably, the centrifuge 4 is a vertical flat plate centrifuge or a horizontal scraper discharge centrifuge.
In some embodiments, the desulfurization wastewater treatment system of the present embodiment further includes a solid waste tank 5, the solid waste tank 5 being in communication with the eighth outlet to receive and store the solid waste.
As shown in fig. 1, the eighth outlet is communicated with the solid waste pool 5, so that the solid waste discharged from the eighth outlet is placed in the solid waste pool 5 for storage, and environmental pollution is avoided.
In the description of the present invention, it should be understood that the terms "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between, and not for understanding as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (10)
1. A desulfurization wastewater treatment system, comprising:
the device comprises a first heat exchanger (1), a second heat exchanger (1) and a third heat exchanger, wherein the first heat exchanger (1) is used for acquiring desulfurization wastewater and heating the desulfurization wastewater;
a concentrating assembly (2), wherein the concentrating assembly (2) is communicated with the first heat exchanger (1) to receive the desulfurization wastewater after temperature rise and flash-evaporate at least the desulfurization wastewater to concentrate the desulfurization wastewater;
a dryer (3), wherein the dryer (3) is communicated with the concentration assembly (2) to receive the concentrated desulfurization wastewater and dry the desulfurization wastewater;
and the centrifugal machine (4) is communicated with the dryer (3) to receive the dried desulfurization wastewater and perform centrifugation.
2. The desulfurization wastewater treatment system according to claim 1, wherein the concentration assembly (2) comprises:
a first flash evaporator (21), wherein the first flash evaporator (21) is communicated with the first heat exchanger (1) to receive the desulfurization wastewater after temperature rise and perform primary flash evaporation on the desulfurization wastewater;
-a thickener (22), said thickener (22) being in communication with said first flash evaporator (21) for receiving said desulfurization wastewater after one flash evaporation, said dryer (3) being in communication with said thickener (22) for obtaining said desulfurization wastewater discharged by said thickener (22).
3. The desulfurization wastewater treatment system according to claim 2, wherein the concentration assembly (2) further comprises:
and a second flash evaporator (23), wherein the second flash evaporator (23) is communicated between the first flash evaporator (21) and the thickener (22) so as to receive the desulfurization wastewater subjected to primary flash evaporation and perform secondary flash evaporation, and the desulfurization wastewater subjected to secondary flash evaporation is fed into the thickener (22).
4. A desulfurization wastewater treatment system according to claim 3, characterized in that the concentration assembly (2) further comprises:
-a first circulation pump (24), the first circulation pump (24) having a first inlet, a first outlet and a second outlet, the first inlet being in communication with the first flash vessel (21) to obtain the desulfurization waste water after one flash, the first outlet being in communication with the first flash vessel (21) to return a portion of the desulfurization waste water after one flash to the first flash vessel (21), the second outlet being in communication with the second flash vessel (23) to feed another portion of the desulfurization waste water after one flash to the second flash vessel (23);
-a second circulation pump (25), the second circulation pump (25) having a second inlet, a third outlet and a fourth outlet, the second inlet being in communication with the second flash evaporator (23) to obtain the desulfurization waste water after the secondary flash evaporation, the third outlet being in communication with the second flash evaporator (23) to return a portion of the desulfurization waste water after the secondary flash evaporation to the second flash evaporator (23), the fourth outlet being in communication with the thickener (22) to feed another portion of the desulfurization waste water after the secondary flash evaporation to the thickener (22);
-a third circulation pump (26), the third circulation pump (26) having a third inlet communicating with the thickener (22) to obtain the desulfurization waste water discharged from the thickener (22), a fifth outlet communicating with the thickener (22) to return a part of the desulfurization waste water discharged from the thickener (22) to the thickener (22), and a sixth outlet communicating with the dryer (3) to feed another part of the desulfurization waste water discharged from the thickener (22) to the dryer (3).
5. The desulfurization wastewater treatment system according to claim 2, wherein the concentration assembly (2) further comprises a first vapor discharge pipe (27), a desuperheater (28) and a condensate tank (29), the first vapor discharge pipe (27) being in communication between the thickener (22) and the condensate tank (29), the desuperheater (28) being provided on the first vapor discharge pipe (27).
6. The desulfurization wastewater treatment system according to claim 1, characterized in that the dryer (3) has a first space communicating between the thickening assembly (2) and the centrifuge (4) and a second space communicating with a source of a heat medium, the heat medium in the second space being in heat transfer with the desulfurization wastewater in the first space to dry the desulfurization wastewater in the first space.
7. The desulfurization wastewater treatment system according to claim 6, characterized in that the second space communicates with the concentration assembly (2) to supply the heat medium passing through the heat transfer in the second space to the concentration assembly (2).
8. The desulfurization wastewater treatment system according to claim 1, characterized in that the first heat exchanger (1) has a third space for taking desulfurization wastewater and a fourth space which communicates with the concentration module (2) and/or the dryer (3) to take steam discharged from the concentration module (2) and/or the dryer (3), and the desulfurization wastewater in the third space and the steam in the fourth space are heat-exchanged.
9. The desulfurization wastewater treatment system according to claim 1, characterized in that the centrifuge (4) has a seventh outlet communicating with the concentration assembly (2) for feeding centrifugally generated clean water into the concentration assembly (2) and an eighth outlet for discharging centrifugally generated solid waste out of the centrifuge (4).
10. The desulfurization wastewater treatment system of claim 9, further comprising a solid waste tank (5), the solid waste tank (5) being in communication with the eighth outlet to receive and store the solid waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310119654.5A CN116675361A (en) | 2023-02-15 | 2023-02-15 | Desulfurization wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310119654.5A CN116675361A (en) | 2023-02-15 | 2023-02-15 | Desulfurization wastewater treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116675361A true CN116675361A (en) | 2023-09-01 |
Family
ID=87779745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310119654.5A Pending CN116675361A (en) | 2023-02-15 | 2023-02-15 | Desulfurization wastewater treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116675361A (en) |
-
2023
- 2023-02-15 CN CN202310119654.5A patent/CN116675361A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105217702A (en) | A kind of desulfurization wastewater treatment system | |
| CN107324426A (en) | A kind of residual heat from boiler fume coupling evaporation concentrates desulfurization wastewater system | |
| EP0485375A1 (en) | Method and apparatus for evaporation of liquids. | |
| WO2019056183A1 (en) | Regenerative sludge heat drying system | |
| KR20120038132A (en) | Multiple drying appratus of sludge and method thereof | |
| US10220327B2 (en) | Steam heating type sewage treatment device | |
| WO2013144438A1 (en) | Flue gas heat recovery method and system | |
| CN105363227A (en) | Mechanical vapor recompression system and mechanical vapor recompression method based on system | |
| CN116675361A (en) | Desulfurization wastewater treatment system | |
| CN110404281A (en) | A kind of economic benefits and social benefits external circulation evaporator | |
| KR101125864B1 (en) | A Processing Apparatus for Wastewater Treatment | |
| KR100789001B1 (en) | Dring unit for organic wastes disposal system | |
| KR100292985B1 (en) | Evaporative Wastewater Treatment System | |
| EP3353346B1 (en) | System and process for stripping volatile organic compounds from foul condensate | |
| CN215947076U (en) | Sludge thin layer drying system | |
| KR101176113B1 (en) | Evaporative condensing apparatus for waste water and system including the apparatus | |
| CN219518348U (en) | Environment-friendly carbon processing environment-friendly treatment device | |
| RU65395U1 (en) | Desalination plant | |
| CN214990391U (en) | Device for treating desulfurization wastewater by using ultra-low temperature flue gas waste heat behind desulfurization absorption tower | |
| CN217511188U (en) | Skid-mounted low-temperature MVR evaporation device | |
| CN219058591U (en) | Evaporation device for treating fermentation filtrate | |
| CN110448930B (en) | Water making device | |
| CN220012211U (en) | Deamination system | |
| CN209128230U (en) | A kind of high-salt wastewater processing unit | |
| CN217178487U (en) | Demineralized water heater of combined sludge drying machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |