CN215517038U - Wastewater treatment equipment - Google Patents
Wastewater treatment equipment Download PDFInfo
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- CN215517038U CN215517038U CN202121068190.2U CN202121068190U CN215517038U CN 215517038 U CN215517038 U CN 215517038U CN 202121068190 U CN202121068190 U CN 202121068190U CN 215517038 U CN215517038 U CN 215517038U
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- 238000004065 wastewater treatment Methods 0.000 title abstract description 26
- 239000002351 wastewater Substances 0.000 claims abstract description 205
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 107
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 238000000926 separation method Methods 0.000 claims abstract description 30
- 238000001704 evaporation Methods 0.000 claims abstract description 19
- 230000008020 evaporation Effects 0.000 claims abstract description 19
- 239000013589 supplement Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 description 11
- 150000003839 salts Chemical class 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
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- 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
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- 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
- C02F1/043—Details
-
- 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
- C02F1/048—Purification of waste water by evaporation
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model provides a wastewater treatment device, which comprises an N-stage condenser, wherein N-stage flash evaporators are communicated in sequence; the steam output end of the Mth-stage flash evaporator is communicated with the steam input end of the Mth-stage condenser, so that the steam flashed out enters the condenser to generate condensed water for supplying heat; the waste water input end of the Nth-stage flash evaporator is communicated with the waste water output end of the heating device and is used for introducing the heated waste water into the Nth-stage flash evaporator; and the wastewater output end of the first-stage flash evaporator is communicated with the wastewater input end of the solid-liquid separation device and is used for carrying out solid-liquid separation on the wastewater subjected to flash evaporation. The device generates steam through multi-stage flash evaporation, water condensed by the condenser is used as water supplement of the heat supply network, and heat added by the heating device is completely transferred to water of the heat supply network, so that the operation cost for treating wastewater is greatly reduced.
Description
Technical Field
The utility model relates to the field of wastewater treatment and heat supply, in particular to a wastewater treatment device.
Background
With the development of society and the advance of urbanization process, the pollution of water resources draws more and more attention of society. How to effectively treat the wastewater is one of the important targets for realizing sustainable development. However, the existing wastewater treatment methods have respective defects.
In the prior art, based on the principle of negative pressure low temperature distillation on waste liquid, the heat of steam condensation is transferred to the waste liquid again by using a compressor, the system needs to consume electric energy when in operation, and also relates to refrigerant circulation, the system is complex and the operation cost is higher; in addition, flue gas is utilized to heat demineralized water to generate steam, part of steam is used as a heat source to treat desulfurization wastewater generated by a power plant in a multi-stage flash evaporation mode, the steam generated by a final-stage flash evaporation device is condensed by a cooling system, and the generated concentrated solution is discharged out of the system. Therefore, it is required to develop a wastewater treatment facility.
SUMMERY OF THE UTILITY MODEL
Objects of the utility model
The utility model aims to provide a device for treating wastewater by adopting a multi-stage flash evaporation mode, which is a wastewater treatment device for heating network water by using consumed heat while treating wastewater.
(II) technical scheme
To solve the above problems, an embodiment of the present invention provides a wastewater treatment apparatus including: the N-stage condensers are provided with steam input ends; the N-stage flash evaporators are respectively provided with a wastewater input end, a wastewater output end and a steam output end, and are sequentially communicated; the steam output end of the Mth-stage flash evaporator is communicated with the steam input end of the Mth-stage condenser, so that the steam flashed out enters the condenser to generate condensed water, and the condensed water can be used as heat supply network water supplement; n is more than or equal to 2, and N is more than or equal to M is more than or equal to 1; the heating device is provided with a wastewater input end and a wastewater output end; the waste water input end of the N-stage flash evaporator is communicated with the waste water output end of the heating device and is used for introducing the heated waste water into the N-stage flash evaporator; the solid-liquid separation device is provided with a wastewater input end; and the wastewater output end of the flash evaporator of the first stage is communicated with the wastewater input end of the solid-liquid separation device and is used for carrying out solid-liquid separation on the wastewater after flash evaporation.
Furthermore, the first-stage condenser is provided with a backwater input end and a backwater output end, and is used for heating and outputting the backwater; the rest N-1-level condensers are provided with condensed water output ends, the condensed water generated in the rest N-1-level condensers can be recycled as the water supplement of a heat supply network, and the rest N-1-level condensers are used for heating the wastewater.
Furthermore, the rest N-1 stages of condensers are also provided with a wastewater input end and a wastewater output end, and the rest N-1 stages of condensers are communicated in sequence; the waste water input end of the second-stage condenser is communicated with the waste water output end of a waste water source; and the wastewater output end of the N-th-stage condenser is communicated with the wastewater input end of the heating device (3).
Furthermore, the N-stage flash evaporators are provided with wastewater return water output ends; the wastewater backwater output end of the M-th stage flash evaporator is communicated with the wastewater input end of the M + 1-th stage condenser; the wastewater backwater output end of the N-stage flash evaporator is communicated with the wastewater input end of the heating device; n-1 is more than or equal to M and more than or equal to 1.
Furthermore, the N-level condensers are communicated in sequence, and are provided with a condensed water output end, a return water input end and a return water output end; the condensed water output end of the M-th level condenser is communicated with the return water input end of the M + 1-th level condenser; the water return output end of the M-th level condenser is communicated with the water return input end of the M + 1-th level condenser; the condensed water output end of the Nth-stage condenser is communicated with the input end of the hot user end; the water return output end of the Nth-stage condenser is communicated with the input end of the hot user side; and N-1 is more than or equal to M and more than or equal to 1.
Furthermore, the N-level condensers are communicated in sequence, and are provided with a condensed water output end, a return water input end and a return water output end; the condensed water output end of the M-level condenser is communicated with the input end of the hot user end; n-1 is more than or equal to M and more than or equal to 1.
Further, the waste water input end of the heating device is communicated with the waste water output end of the waste water source.
Further, still include: the wastewater pretreatment device is provided with a wastewater output end and a wastewater input end; the waste water output end of the waste water pretreatment device is communicated with the waste water input end of the second-stage condenser; and the wastewater input end of the wastewater pretreatment device is communicated with the wastewater output end of the wastewater source.
Furthermore, the solid-liquid separation device is also provided with a wastewater return water output end; the first-stage flash evaporator is also provided with a wastewater backwater input end, and the wastewater backwater input end of the first-stage flash evaporator is communicated with the wastewater backwater output end of the solid-liquid separation device; the first-stage flash evaporator is also provided with a wastewater backwater output end, and the wastewater backwater output end of the first-stage flash evaporator is communicated with the wastewater input end of the second-stage condenser.
(III) advantageous effects
The technical scheme of the utility model has the following beneficial technical effects:
the utility model generates steam through multi-stage flash evaporation, the steam obtained by the multi-stage flash evaporation of the wastewater is condensed in the condenser to release heat to generate condensate water, the released heat is used for heating the return water flowing through the condenser, the generated condensate water can be used as supplement water for recycling, the wastewater after flash evaporation passes through the solid-liquid separation device to generate solid salt and clear liquid, the solid-liquid separation is realized, the heat consumed in the wastewater treatment process is transferred to the return water, and the cost for treating the wastewater is greatly reduced.
Drawings
FIG. 1 is a schematic view showing the construction of a wastewater treatment apparatus according to a first embodiment of the present invention;
FIG. 2 is a schematic view showing the construction of a wastewater treatment apparatus according to a second embodiment of the present invention;
FIG. 3 is a schematic view of a wastewater treatment apparatus according to a third embodiment of the present invention;
FIG. 4 is a schematic view of a wastewater treatment apparatus according to a fourth embodiment of the present invention;
FIG. 5 is a schematic view of a wastewater treatment apparatus according to a fifth embodiment of the present invention.
Reference numerals:
1: a condenser; 2: a flash evaporator; 3: a heating device; 4: a solid-liquid separation device; 5: a wastewater pretreatment device; 6: a hot user side.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the utility model. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The utility model will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
FIG. 1 is a schematic view showing the construction of a wastewater treatment apparatus according to a first embodiment of the present invention.
In the first embodiment of the utility model, as shown in FIG. 1, a wastewater treatment device is provided, which mainly comprises an N-stage condenser 1, an N-stage flash evaporator 2 and a solid-liquid separation device 4, wherein N is more than or equal to 2. The N-stage condenser 1 is provided with a steam input end; the N-stage flash evaporators 2 are all provided with a wastewater input end, a wastewater output end and a steam output end, and the N-stage flash evaporators 2 are sequentially communicated and used for flashing wastewater step by step to generate steam; the steam output end of the Mth-stage flash evaporator 2 is communicated with the steam input end of the Mth-stage condenser 1, so that the steam flashed out enters the condenser 1 to be condensed, condensate water is generated, and the condensate water can be led to the input end of the heat user end 6; the heating device 3 is provided with a wastewater input end and a wastewater output end; the wastewater input end of the Nth-stage flash evaporator 2 is communicated with the wastewater output end of the heating device 3 and is used for introducing the heated wastewater into the Nth-stage flash evaporator 2; the solid-liquid separation device 4 is provided with a wastewater input end; the wastewater output end of the first-stage flash evaporator 2 is communicated with the wastewater input end of the solid-liquid separation device 4 and is used for carrying out solid-liquid separation on the wastewater after flash evaporation.
The wastewater treatment equipment in the embodiment of the utility model is provided with at least two stages of flash evaporators 2 and at least two stages of condensers 1, and the multistage flash evaporators 2 and the multistage condensers 1 are respectively and correspondingly arranged, namely, a steam output end of the first stage flash evaporator 2 is communicated with a steam input end of the first stage condenser 1, a steam output end of the second stage flash evaporator 2 is communicated with a steam input end of the second stage condenser 1, and so on, and the description is omitted. The wastewater is flashed in the multistage flash evaporator 2 step by step to generate water vapor, and the water vapor enters the condenser 1 to be condensed to generate condensed water. The wastewater after flash evaporation is subjected to solid-liquid separation treatment by a solid-liquid separation device 4, so that solid salt is separated from wastewater liquid.
In some embodiments, the first-stage condenser 1 is provided with a return water input end and a return water output end, and the first-stage condenser 1 is used for heating and outputting return water; the rest N-1-stage condensers 1 are provided with condensed water output ends, and the rest N-1-stage condensers 1 are used for heating the wastewater to generate condensed water; wherein, the condensed water and the heated return water are both used for heat supply.
Specifically, the backwater input end of the first-stage condenser 1 is communicated with the output end of the hot user end 6, and the backwater output end of the first-stage condenser 1 is communicated with the input end of the hot user end 6. The backwater entering the first-stage condenser 1 is heated by the steam generated by the first-stage flash evaporator 2, and the heated backwater returns to the heat user end 6 for heat supply. Except other N-1 stage condensers 1 of the first stage condenser 1, waste water in the condensers 1 is heated by steam generated by correspondingly communicated flash evaporators 2, and condensed water generated by steam condensation is used for heat supply.
In some embodiments, the rest of the N-1-stage condensers 1 are also provided with a wastewater input end and a wastewater output end, the rest of the N-1-stage condensers 1 are communicated in sequence, and N is more than or equal to 2; wherein, the waste water input of second level condenser 1 is used for with the waste water output intercommunication of waste water source, the waste water output of Nth level condenser and heating device 3's waste water input intercommunication.
Based on aforementioned embodiment, when it is specific, all the other condensers 1 are provided with multistage, namely when other condensers 1 except first-stage condenser 1 exist at least two, all the other condensers 1 communicate in proper order, and the waste water input of second level condenser 1 is used for the waste water output intercommunication with the waste water source, and the waste water output of second level condenser 1 communicates with the waste water input of third level condenser 1, analogizes in proper order, and no longer gives details. The condensers 1 which are communicated in sequence are used for circulating wastewater, heating the wastewater step by step is realized, and simultaneously condensate water is generated.
In some embodiments, the solid-liquid separation device 4 is further provided with a wastewater return water output end; the first-stage flash evaporator 2 is also provided with a wastewater backwater input end, and the wastewater backwater input end of the first-stage flash evaporator 2 is communicated with the wastewater backwater output end of the solid-liquid separation device 4; the first-stage flash evaporator 2 is also provided with a wastewater backwater output end, and the wastewater backwater output end of the first-stage flash evaporator 2 is communicated with the wastewater input end of the second-stage condenser 1.
Specifically, the wastewater is flashed step by step in the process of sequentially flowing through the N-stage flash evaporator 2 (flowing from the Nth-stage flash evaporator 2 to the first-stage flash evaporator 2), the wastewater is introduced into the solid-liquid separation device 4 through the wastewater return water output end of the first-stage flash evaporator 2 for solid-liquid separation, the separated wastewater clear liquid is returned into the first-stage flash evaporator 2 for continuous flash evaporation, and the solid salt separated by the solid-liquid separation device 4 is discharged through the discharge port.
In the first embodiment, a wastewater treatment apparatus mainly comprises a four-stage flash evaporator 2, a four-stage condenser 1, a heating device 3 and a solid-liquid separation device 4. The backwater input end and the backwater output end of the first-stage condenser 1 are respectively communicated with the output end and the input end of the heat user end 6, the backwater circulation is realized, and the backwater is heated at the first-stage condenser 1 and then is input into the heat user end 6. The second-stage condenser 1, the third-stage condenser 1 and the fourth-stage condenser 1 are communicated in sequence, a wastewater input end of the second-stage condenser 1 is communicated with an output end of a wastewater source, wastewater sequentially flows through the second-stage condenser 1, the third-stage condenser 1 and the fourth-stage condenser 1 to be heated step by step, and then flows into the heating device 3 through a wastewater output end of the fourth-stage condenser 1, the heating device 3 can heat the wastewater in a heat exchange mode with a heat source, the heated wastewater sequentially flows into the fourth-stage flash evaporator 2, the third-stage flash evaporator 2, the second-stage flash evaporator 2 and the first-stage flash evaporator 2 through a wastewater output end of the heating device 3 to be subjected to flash evaporation to generate steam, the steam generated by the flash evaporators 2 enters the correspondingly arranged condensers 1 to heat the wastewater flowing in the condensers 1, for example, the steam generated by the fourth-stage flash evaporators 2 enters the fourth-stage condenser 1, heating the wastewater flowing through the fourth-stage condenser 1 to generate condensed water; the condensed water generated by each stage of condenser 1 is introduced into the input end of the hot user end 6 through the condensed water output end. And the wastewater flowing to the first-stage flash evaporator 2 flows to a solid-liquid separator through a wastewater output end to carry out solid-liquid separation to obtain solid salt and wastewater clear liquid, wherein the solid salt is discharged from a discharge port, and the clear liquid returns to the first-stage flash evaporator 2 to continue flash evaporation.
FIG. 2 is a schematic view showing the construction of a wastewater treatment apparatus according to a second embodiment of the present invention.
In a second embodiment of the present invention, as shown in fig. 2, different from the previous embodiment, the N-stage flash evaporators 2 are all provided with a wastewater return water output end; the wastewater backwater output end of the Mth-stage flash evaporator 2 is communicated with the wastewater input end of the Mth + 1-stage condenser 1; the wastewater backwater output end of the Nth-stage flash evaporator 2 is communicated with the wastewater input end of the heating device 3; n-1 is more than or equal to M and more than or equal to 1.
Specifically, the wastewater in each stage of flash evaporator 2 is introduced into the condenser 1 corresponding to the previous stage of flash evaporator 2 for heating, the wastewater flow in the flash evaporator 2 is enhanced, and the efficiency of transferring the heat consumed in the wastewater treatment process to the thermally condensed water is improved.
In the second specific embodiment, different from the first specific embodiment, the second stage flash evaporator 2, the third stage flash evaporator 2 and the fourth stage flash evaporator 2 are further provided with a wastewater backwater output end, wherein the wastewater backwater output end of the second stage flash evaporator 2 is communicated with the wastewater input end of the third stage condenser 1, the wastewater backwater output end of the third stage flash evaporator 2 is communicated with the wastewater input end of the fourth stage condenser 1, and the wastewater backwater output end of the fourth stage flash evaporator 2 is communicated with the wastewater input end of the heating device 3.
FIG. 3 is a schematic view of a wastewater treatment apparatus according to a third embodiment of the present invention.
In a third embodiment of the present invention, as shown in fig. 3, different from the previous embodiments, N-stage condensers 1 are sequentially communicated, and the N-stage condensers 1 are each provided with a condensed water output end, a return water input end, and a return water output end; the condensed water output end of the Mth-stage condenser 1 is communicated with the return water input end of the M +1 th-stage condenser 1; the backwater output end of the M-th level condenser 1 is communicated with the backwater input end of the M + 1-th level condenser 1; the condensed water output end of the Nth-stage condenser 1 is communicated with the input end of the hot user end 6; the backwater output end of the Nth-stage condenser 1 is communicated with the input end of the hot user end 6; and N-1 is more than or equal to M is more than or equal to 1;
in some embodiments, the waste water input of the heating device 3 is adapted to communicate with a waste water output of a waste water source.
Specifically, the return water output from the heat user end 6 sequentially flows through the N-stage condenser 1, the steam generated by flash evaporation of the wastewater heats the return water, and the generated condensed water is also used for heat supply.
In a third specific embodiment, different from the foregoing specific embodiments, the four-stage condensers 1 are sequentially communicated, that is, the return water output end of the first-stage condenser 1 is communicated with the return water input end of the second-stage condenser 1, the return water output end of the second-stage condenser 1 is communicated with the return water input end of the third-stage condenser 1, and the return water output end of the third-stage condenser 1 is communicated with the return water input end of the fourth-stage condenser 1; the four-stage condenser 1 is provided with a condensed water output end, the condensed water output end of the first-stage condenser 1 is communicated with the wastewater input end of the second-stage condenser 1, the condensed water output end of the second-stage condenser 1 is communicated with the wastewater input end of the third-stage condenser 1, the condensed water output end of the third-stage condenser 1 is communicated with the wastewater input end of the fourth-stage condenser 1, and the condensed water output end of the fourth-stage condenser 1 is communicated with the input end of the hot user end 6. In addition, the waste water input end of the heating device 3 is communicated with the waste water output end of the waste water source, and the waste water is directly heated. By the arrangement, the hot condensed water is heated for many times, so that the return water temperature is increased.
FIG. 4 is a schematic view of a wastewater treatment apparatus according to a fourth embodiment of the present invention.
In a fourth embodiment of the present invention, as shown in fig. 4, different from the third embodiment, N-stage condensers 1 are sequentially communicated, and the N-stage condensers 1 are each provided with a condensed water output end, a return water input end, and a return water output end; the hot condensed water output end of the M-level condenser 1 is used for being communicated with the input end of a hot user; n is more than or equal to M and more than or equal to 1.
In the fourth specific embodiment, different from the third specific embodiment, the condensed water output end of the second-stage condenser 1, the condensed water output end of the third-stage condenser 1 and the condensed water output end of the fourth-stage condenser 1 are converged at the condensed water output end of the fourth-stage condenser 1, and then are communicated with the input end of the hot user end 6.
FIG. 5 is a schematic view of a wastewater treatment apparatus according to a fifth embodiment of the present invention.
In a fifth embodiment of the present invention, as shown in fig. 5, unlike the previous embodiments, the wastewater treatment apparatus further includes a wastewater pretreatment device 5, the wastewater pretreatment device 5 being provided with a wastewater output terminal and a wastewater input terminal; the waste water output end of the waste water pretreatment device 5 is communicated with the waste water input end of the second-stage condenser 1; the wastewater input end of the wastewater pretreatment device 5 is communicated with the wastewater output end of the wastewater source.
In the fifth embodiment, different from the previous embodiments, a wastewater pretreatment device 5 is further included, and the wastewater pretreatment device 5 pretreats the wastewater, and the pretreated wastewater participates in the subsequent process. The wastewater pretreatment device 5 can be a plurality of wastewater pretreatment modes such as common permeation, sedimentation, dosing treatment and the like.
In some embodiments, the condenser 1 is a hybrid condenser 1.
In some embodiments, the condenser 1 is a surface condenser 1.
In some embodiments, the heating device 3 includes a heat exchanger, and the heat exchanger is used for exchanging heat between the wastewater and an external heat source, so as to heat the wastewater.
In some embodiments, the heat exchanger is a hybrid heat exchanger.
In some embodiments, the heat exchanger is a surface heat exchanger.
The technical scheme of the utility model has the following beneficial technical effects:
the utility model generates steam through multi-stage flash evaporation, the steam obtained by the multi-stage flash evaporation of the wastewater is condensed in the condenser to release heat to generate condensate water, the released heat is used for heating the return water flowing through the condenser, the generated condensate water can be used as supplement water for recycling, the wastewater after flash evaporation passes through the solid-liquid separation device 4 to generate solid salt and clear liquid, the solid-liquid separation is realized, the heat consumed in the wastewater treatment process is transferred to the return water, and the cost for treating the wastewater is greatly reduced.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. An apparatus for treating wastewater, comprising:
the N-stage condensers (1) are respectively provided with a steam input end;
the N-stage flash evaporators (2) are respectively provided with a wastewater input end, a wastewater output end and a steam output end, and the N-stage flash evaporators (2) are sequentially communicated; the steam output end of the Mth-stage flash evaporator (2) is communicated with the steam input end of the Mth-stage condenser (1), so that the flashed steam enters the condenser (1) to generate condensed water; n is more than or equal to 2, and N is more than or equal to M is more than or equal to 1;
the heating device (3) is provided with a wastewater input end and a wastewater output end; the waste water input end of the N-th-stage flash evaporator (2) is communicated with the waste water output end of the heating device (3) and is used for introducing the heated waste water into the N-th-stage flash evaporator (2);
the solid-liquid separation device (4) is provided with a wastewater input end; and the wastewater output end of the first-stage flash evaporator (2) is communicated with the wastewater input end of the solid-liquid separation device (4) and is used for carrying out solid-liquid separation on the wastewater subjected to flash evaporation.
2. The apparatus of claim 1,
the first-stage condenser (1) is provided with a backwater input end and a backwater output end, and the first-stage condenser (1) is used for heating the backwater and then outputting the heated backwater;
the rest N-1-stage condenser (1) is provided with a condensed water output end, the rest N-1-stage condenser (1) is used for heating wastewater, and the condensed water generated in the rest N-1-stage condenser can be recycled as the water supplement of a heat supply network.
3. The apparatus of claim 2,
the rest N-1-stage condensers (1) are also provided with a wastewater input end and a wastewater output end, and the rest N-1-stage condensers (1) are communicated in sequence; n is more than or equal to 2; wherein,
the waste water input end of the second-stage condenser (1) is used for being communicated with the waste water output end of a waste water source;
and the wastewater output end of the N-th-stage condenser (1) is communicated with the wastewater input end of the heating device (3).
4. The apparatus of claim 3,
the N-stage flash evaporators (2) are all provided with wastewater return water output ends;
the wastewater backwater output end of the M-th stage flash evaporator (2) is communicated with the wastewater input end of the M + 1-th stage condenser (1);
the wastewater backwater output end of the N-th stage flash evaporator (2) is communicated with the wastewater input end of the heating device (3); and N-1 is more than or equal to M and more than or equal to 1.
5. The apparatus of claim 1,
the N-level condensers (1) are communicated in sequence, and the N-level condensers (1) are provided with a condensed water output end, a return water input end and a return water output end;
the condensed water output end of the Mth-level condenser (1) is communicated with the return water input end of the Mth + 1-level condenser (1);
the water return output end of the M-th-stage condenser (1) is communicated with the water return input end of the M + 1-th-stage condenser (1); the condensed water output end of the Nth-stage condenser (1) is communicated with the input end of a heat user end (6);
the water return output end of the Nth-stage condenser (1) is communicated with the input end of a heat user end (6); and N-1 is more than or equal to M and more than or equal to 1.
6. The apparatus of claim 1,
the N-level condensers (1) are communicated in sequence, and the N-level condensers (1) are provided with a condensed water output end, a return water input end and a return water output end;
the condensed water output end of the M-level condenser (1) is communicated with the input end of the heat user end (6); n-1 is more than or equal to M and more than or equal to 1.
7. The apparatus according to claim 5 or 6,
and the wastewater input end of the heating device (3) is communicated with the wastewater output end of the wastewater source.
8. The apparatus of any of claims 1-6, further comprising:
the wastewater pretreatment device (5) is provided with a wastewater output end and a wastewater input end;
the waste water output end of the waste water pretreatment device (5) is communicated with the waste water input end of the second-stage condenser (1);
and the wastewater input end of the wastewater pretreatment device (5) is communicated with the wastewater output end of the wastewater source.
9. The apparatus of claim 1,
the solid-liquid separation device (4) is also provided with a wastewater backwater output end;
the first-stage flash evaporator (2) is also provided with a wastewater backwater input end, and the wastewater backwater input end of the first-stage flash evaporator (2) is communicated with the wastewater backwater output end of the solid-liquid separation device (4);
the first-stage flash evaporator (2) is also provided with a wastewater backwater output end, and the wastewater backwater output end of the first-stage flash evaporator (2) is communicated with the wastewater input end of the second-stage condenser (1).
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