CN114262111A - Softened sewage treatment system of heat exchange station - Google Patents
Softened sewage treatment system of heat exchange station Download PDFInfo
- Publication number
- CN114262111A CN114262111A CN202111611370.5A CN202111611370A CN114262111A CN 114262111 A CN114262111 A CN 114262111A CN 202111611370 A CN202111611370 A CN 202111611370A CN 114262111 A CN114262111 A CN 114262111A
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- China
- Prior art keywords
- softened
- water
- sewage
- heat exchanger
- heat exchange
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- 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.)
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Links
- 239000010865 sewage Substances 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 119
- 239000012452 mother liquor Substances 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims 2
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000010612 desalination reaction Methods 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 description 12
- 230000008020 evaporation Effects 0.000 description 12
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 3
- 239000008400 supply water Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Abstract
The invention provides a heat exchange station softened sewage treatment system which comprises a softened water device, a heat exchanger, a flash tank, a condenser and a centrifuge, wherein a sewage discharge port of the softened water device is connected with an inlet of the heat exchanger through a softened sewage pipe, an inlet of the flash tank is connected with an outlet of the heat exchanger through a high-temperature sewage pipe, a steam outlet of the flash tank is connected with the condenser through a steam pipe, a water outlet of the flash tank is connected with the centrifuge through a concentrated sewage pipe, and a water outlet of the centrifuge is connected with the heat exchanger through a mother liquor pipe. The invention realizes the concentration and desalination of the sewage by treating the softened sewage, and is connected with the primary net and the secondary net system of the heat exchange station, thereby reducing the return water temperature of the primary net, improving the water supply temperature of the secondary net and reducing the environmental pollution.
Description
Technical Field
The invention relates to the technical field of heat supply and environmental protection, in particular to a softened sewage treatment system of a heat exchange station.
Background
In the heat supply and exchange station, the make-up water required by the heat supply system contains a plurality of inorganic salt substances, such as calcium, magnesium salt and the like, and if the salt substances are not treated and enter the system circulation, the scaling of a boiler, a pipeline, a heat exchanger and the whole system can be caused. Therefore, the make-up water needs to be softened, and a large amount of softened sewage is generated in the treatment process.
When the existing softened water treatment device of the heat exchange station is used, raw water enters the softened water device and passes through the resin layer, and softened water is generated after exchange reaction. In the long-time operation process, the resin required by the softening device needs to be regenerated, softened wastewater is generated in the process, and the softened wastewater is generally directly discharged to cause environmental pollution. Therefore, a system for treating sewage is required.
Disclosure of Invention
The invention aims to provide a softened sewage treatment system of a heat exchange station, which is used for treating softened sewage to realize sewage concentration and desalination, is connected with a primary net and a secondary net system of the heat exchange station, reduces the return water temperature of the primary net, improves the supply water temperature of the secondary net and reduces environmental pollution.
According to one object of the invention, the invention provides a heat exchange station softened sewage treatment system which comprises a softened water device, a heat exchanger, a flash tank, a condenser and a centrifuge, wherein a sewage discharge outlet of the softened water device is connected with an inlet of the heat exchanger through a softened sewage pipe, an inlet of the flash tank is connected with an outlet of the heat exchanger through a high-temperature sewage pipe, a steam outlet of the flash tank is connected with the condenser through a steam pipe, a water outlet of the flash tank is connected with the centrifuge through a concentrated sewage pipe, and a water outlet of the centrifuge is connected with the heat exchanger through a mother liquor pipe.
Furthermore, a water inlet of a heat medium layer of the heat exchanger is connected with a primary network water supply system, and a water outlet of the heat medium layer of the heat exchanger is connected with a primary network water return system.
Furthermore, a water inlet of the condenser is connected with a secondary network water return system, and a water outlet of the condenser is connected with a secondary network water supply system.
Furthermore, a condensed water discharge pipe is arranged at the bottom of the condenser, and a condensed water discharge pump is arranged on the condensed water discharge pipe.
Further, the top of the condenser is connected with a vacuum pump.
Further, the softened water device further comprises a raw water inlet and a softened water outlet, the softened water outlet is connected with a softened water pipe, and the condensed water discharge pipe is connected with the softened water pipe.
Further, a drain outlet is formed in the bottom of the flash tank.
Further, a sewage pump is arranged between the softened sewage pipe and the heat exchanger.
Furthermore, the flash tank is at least two, two the flash tank is established ties in proper order, the quantity of condenser with the quantity of flash tank is the same, the steam outlet of flash tank respectively with correspond the condenser is connected.
Furthermore, the medium in the secondary net return water system enters the secondary water supply system after passing through the plurality of condensers in sequence.
According to the technical scheme, the softened sewage is treated to realize the concentration and desalination of the sewage, and the sewage is connected with the primary net and the secondary net system of the heat exchange station, so that the return water temperature of the primary net is reduced, the supply water temperature of the secondary net is increased, and the environmental pollution is 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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a schematic structural diagram of example 2 of the present invention;
FIG. 3 is a schematic structural diagram according to embodiment 3 of the present invention;
in the figure, 1, a water softening device; 101. a raw water inlet; 102. a softened water outlet; 103. a sewage draining outlet; 2. a heat exchanger; 3. a flash tank; 4. a condenser; 5. a centrifuge; 6. softening the sewage pipe; 7. a sewage pump; 8. a primary network water supply system; 9. a primary net water return system; 10. a high temperature sewer pipe; 11. a steam pipe; 12. a secondary net water return system; 13. a secondary network water supply system; 14. a condensed water discharge pipe; 15. a condensate discharge pump; 16. a vacuum pump; 17. a thick sewage pipe; 18. a mother liquor tube; 19. a sewage draining outlet; 20. softening the water pipe.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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 the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1:
the utility model provides a heat exchange station softens sewage treatment system, includes demineralized water device 1, heat exchanger 2, flash tank 3, condenser 4 and centrifuge 5, and demineralized water device 1 includes raw water import 101, demineralized water export 102 and drain 103, and demineralized water export 102 is connected with demineralized water pipe 20.
The sewage draining outlet of the softened water device 1 is connected with the inlet of the heat exchanger 2 through a softened sewage pipe 6, and a sewage pump 7 is arranged between the softened sewage pipe 6 and the heat exchanger 2. The water inlet of the heat medium layer of the heat exchanger 2 is connected with a primary net water supply system 8, and the water outlet of the heat medium layer of the heat exchanger 2 is connected with a primary net water return system 9.
An inlet of the flash tank 3 is connected with an outlet of the heat exchanger 2 through a high-temperature sewage pipe 10, a steam outlet of the flash tank 3 is connected with a condenser 4 through a steam pipe 11, a water inlet of the condenser 4 is connected with a secondary net water return system 12, and a water outlet of the condenser 4 is connected with a secondary net water supply system 13. The bottom of the condenser 4 is provided with a condensed water discharge pipe 14, and the condensed water discharge pipe 14 is provided with a condensed water discharge pump 15. The top of the condenser 4 is connected to a vacuum pump 16.
The water outlet of the flash tank 3 is connected with the centrifuge 5 through a thick sewage pipe 17, and the water outlet of the centrifuge 5 is connected with the heat exchanger 2 through a mother liquor pipe 18. The bottom of the flash tank 3 is provided with a sewage draining outlet 19.
Softened sewage enters the heat exchanger 2 to exchange heat with the water supplied by the primary net part, and is heated to a higher temperature to enter the flash tank 3. The primary network water supply is merged into a primary network water return pipe network after being greatly cooled. The softened sewage with high temperature is subjected to flash evaporation in the flash tank 3, part of secondary net return water is heated by the steam which is flashed out, the secondary net return water after temperature rise enters the secondary net supply water again, and the flash steam is directly discharged after condensation. The high concentration softened sewage after the flash distillation enters the centrifuge 5 to be separated, the salinity is discharged, and the mother liquor is merged into the softened sewage inlet again to be circulated. The flash tank 3 only needs to discharge sewage regularly, and the discharge of sewage can be reduced.
Sewage from the water softening device 1 enters the heat exchanger 2 through a sewage pump, and the temperature of the preheated sewage is reduced by the primary network water supply system and returns to the primary network water return system. The heated high-temperature sewage enters a flash tank for flash evaporation, the generated steam enters a condenser for condensation, and a secondary net water return system enters a condenser 4 for heating and then enters a secondary net water supply system. The concentrated sewage after flash evaporation enters a centrifuge 5, solid salt is generated and discharged, and the residual mother liquor is mixed with the sewage discharged by the softening device and enters a heat exchanger 2 for circulation. And a vacuum pump connected with the condenser 4 needs to continuously vacuumize in the system operation process, and the flash tank 3 is opened to discharge sewage after the system operates for a period of time.
Example 2
As shown in figure 2 of the drawings, in which,
the structure of this embodiment and embodiment 1 is the same basically, and its difference lies in, congeals water discharge pipe 14 and is connected with softened water pipe 20, and the comdenstion water not only can directly be arranged outward after the steam condensation that flashes out, if congeal water quality of water up to standard, can merge into softened water system through the condensate pump in.
Example 3
As shown in figure 3 of the drawings,
the structure of this embodiment is basically the same as that of embodiment 1, and the difference is that the flashing of this system to the sewage is not limited to single-stage flashing, and multistage flashing, multistage heating can also be carried out according to actual conditions. In this embodiment, the two flash tanks 3 are provided, the two flash tanks 3 are sequentially connected in series, the number of the condensers 4 is the same as that of the flash tanks, and the steam outlets of the flash tanks 3 are respectively connected with the corresponding condensers 4. The medium in the secondary net return water system enters the secondary water supply system after passing through the two condensers 4 in sequence.
Sewage from the water softening device 1 enters the heat exchanger 2 through a sewage pump, and the temperature of the preheated sewage is reduced by the primary network water supply system and returns to the primary network water return system. The heated high-temperature sewage enters a primary flash tank 3 for flash evaporation, the generated steam enters a final-stage condenser for condensation, and condensed water is discharged outside or the water quality reaches the standard and is merged into a softened water system. The secondary net backwater heated by the upper-stage condenser enters the last-stage condenser, is heated and then enters a secondary net water supply system. The concentrated sewage after primary flash evaporation enters a final-stage flash evaporation tank for flash evaporation, the generated flash evaporation steam enters a primary condenser for condensation, and condensed water is discharged outside or the water quality reaches the standard and is merged into a softened water system. And the secondary net water return system enters the primary condenser to be heated and then enters the final condenser to be continuously heated. The concentrated wastewater after final-stage flash evaporation enters a centrifuge, generated solid salt is discharged outside, and the residual mother liquor is mixed with the sewage discharged by the softening device and enters the heat exchanger 2 for circulation. And a vacuum pump connected with the condenser needs to continuously vacuumize in the operation process of the system, and the last-stage flash tank is opened to discharge sewage after the system operates for a period of time. The structure is not limited to the two-stage flash evaporation and the two-stage heating shown in fig. 3, and the multi-stage flash evaporation and the multi-stage heating can be carried out according to actual conditions. The number of the flash tanks and the number of the condensers are reversely arranged. It should be understood that the number of the flash tank and the condenser can be not only two, but also three, four or more, so as to realize the purpose of multi-stage flash evaporation and multi-stage heating.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a heat transfer station softens blowdown water processing system, its characterized in that, including softening water installation, heat exchanger, flash tank, condenser and centrifuge, the drain of softening water installation through soften the sewer with the access connection of heat exchanger, the entry of flash tank pass through high temperature sewer with the exit linkage of heat exchanger, the steam outlet of flash tank pass through the steam pipe with the condenser is connected, the delivery port of flash tank pass through dense sewer with centrifuge connects, centrifuge's delivery port pass through the mother liquor pipe with the heat exchanger is connected.
2. The softened sewage treatment system of the heat exchange station as recited in claim 1, wherein the water inlet of the heat medium layer of the heat exchanger is connected with a primary net water supply system, and the water outlet of the heat medium layer of the heat exchanger is connected with a primary net water return system.
3. The softened sewage treatment system of the heat exchange station as recited in claim 1, wherein the water inlet of the condenser is connected with a secondary net water return system, and the water outlet of the condenser is connected with a secondary net water supply system.
4. The softened sewage treatment system of the heat exchange station as recited in claim 1, wherein a condensed water discharge pipe is provided at the bottom of the condenser, and a condensed water discharge pump is provided on the condensed water discharge pipe.
5. The softened sewage treatment system of the heat exchange station as recited in claim 1, wherein a vacuum pump is connected to the top of the condenser.
6. The heat exchange station softened sewage treatment system according to claim 4, wherein the softened water device further comprises a raw water inlet and a softened water outlet, the softened water outlet is connected with a softened water pipe, and the condensed water discharge pipe is connected with the softened water pipe.
7. The softened sewage treatment system of the heat exchange station of claim 1, wherein a sewage draining outlet is formed at the bottom of the flash tank.
8. The softened sewage treatment system of the heat exchange station of claim 1, wherein a sewage pump is arranged between the softened sewage pipe and the heat exchanger.
9. The heat exchange station softened sewage treatment system according to claim 1, wherein the number of the flash tanks is at least two, the two flash tanks are sequentially connected in series, the number of the condensers is the same as that of the flash tanks, and steam outlets of the flash tanks are respectively connected with the corresponding condensers.
10. The softened sewage treatment system of the heat exchange station as recited in claim 9, wherein the medium in the secondary net return water system sequentially passes through the plurality of condensers and then enters the secondary water supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111611370.5A CN114262111A (en) | 2021-12-27 | 2021-12-27 | Softened sewage treatment system of heat exchange station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111611370.5A CN114262111A (en) | 2021-12-27 | 2021-12-27 | Softened sewage treatment system of heat exchange station |
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| Publication Number | Publication Date |
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| CN114262111A true CN114262111A (en) | 2022-04-01 |
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| CN202111611370.5A Pending CN114262111A (en) | 2021-12-27 | 2021-12-27 | Softened sewage treatment system of heat exchange station |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084631A (en) * | 2015-08-26 | 2015-11-25 | 山东鼎信生态微环境科技股份有限公司 | Process for treating resin regeneration wastewater |
| CN206915802U (en) * | 2017-06-29 | 2018-01-23 | 西安协力动力科技有限公司 | A kind of air cooling unit exhaust steam Heat Treatment waste water energy conserving system |
| US20180154277A1 (en) * | 2016-12-02 | 2018-06-07 | Friedrich Alt | Multi-stage flash desalination system with thermal vapor compressor |
| CN208711065U (en) * | 2018-07-31 | 2019-04-09 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of evaporative crystallization heat-exchanger rig and heat-engine plant wet desulfurization wastewater Zero discharging system |
| CN109607979A (en) * | 2019-01-24 | 2019-04-12 | 河北先达环保工程有限公司 | Treatment method for high-salinity wastewater |
| CN111302417A (en) * | 2019-05-29 | 2020-06-19 | 哈尔滨工大金涛科技股份有限公司 | Industrial wastewater temperature difference waste heat concentration device and method |
| CN111689539A (en) * | 2019-03-14 | 2020-09-22 | 上海江柘环境工程技术有限公司 | Membrane distillation process for advanced treatment of high-concentration desulfurization wastewater concentrated solution of power plant |
-
2021
- 2021-12-27 CN CN202111611370.5A patent/CN114262111A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084631A (en) * | 2015-08-26 | 2015-11-25 | 山东鼎信生态微环境科技股份有限公司 | Process for treating resin regeneration wastewater |
| US20180154277A1 (en) * | 2016-12-02 | 2018-06-07 | Friedrich Alt | Multi-stage flash desalination system with thermal vapor compressor |
| CN206915802U (en) * | 2017-06-29 | 2018-01-23 | 西安协力动力科技有限公司 | A kind of air cooling unit exhaust steam Heat Treatment waste water energy conserving system |
| CN208711065U (en) * | 2018-07-31 | 2019-04-09 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of evaporative crystallization heat-exchanger rig and heat-engine plant wet desulfurization wastewater Zero discharging system |
| CN109607979A (en) * | 2019-01-24 | 2019-04-12 | 河北先达环保工程有限公司 | Treatment method for high-salinity wastewater |
| CN111689539A (en) * | 2019-03-14 | 2020-09-22 | 上海江柘环境工程技术有限公司 | Membrane distillation process for advanced treatment of high-concentration desulfurization wastewater concentrated solution of power plant |
| CN111302417A (en) * | 2019-05-29 | 2020-06-19 | 哈尔滨工大金涛科技股份有限公司 | Industrial wastewater temperature difference waste heat concentration device and method |
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