CN115159602A - Low-temperature multi-effect seawater desalination cleaning sludge online removal system - Google Patents
Low-temperature multi-effect seawater desalination cleaning sludge online removal system Download PDFInfo
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- CN115159602A CN115159602A CN202210833687.1A CN202210833687A CN115159602A CN 115159602 A CN115159602 A CN 115159602A CN 202210833687 A CN202210833687 A CN 202210833687A CN 115159602 A CN115159602 A CN 115159602A
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- 238000004140 cleaning Methods 0.000 title claims abstract description 89
- 239000010802 sludge Substances 0.000 title claims abstract description 70
- 239000013535 sea water Substances 0.000 title claims abstract description 27
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 75
- 238000005554 pickling Methods 0.000 claims abstract description 67
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 239000006004 Quartz sand Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000008234 soft water Substances 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 10
- 239000011552 falling film Substances 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 abstract description 3
- 239000006228 supernatant Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 17
- 239000002253 acid Substances 0.000 description 11
- 239000003814 drug Substances 0.000 description 9
- 238000005273 aeration Methods 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000005406 washing Methods 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 229910001424 calcium ion Inorganic materials 0.000 description 5
- 229910001425 magnesium ion Inorganic materials 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000010414 supernatant solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011045 prefiltration Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Images
Classifications
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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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
- C02F1/4695—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis electrodeionisation
-
- 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
- C02F2103/08—Seawater, e.g. for desalination
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of seawater desalination, in particular to a low-temperature multi-effect seawater desalination cleaning sludge online removal system which comprises a cleaning pipeline, a pickling tank, a sludge dewatering device, a plurality of heat exchange effect body sets and a plurality of connecting pipelines, wherein the cleaning pipeline is communicated with the heat exchange effect body sets, the pickling tank is communicated with the cleaning pipeline, and the sludge dewatering device is connected with the output end of the pickling tank; the plurality of heat exchange effect body groups comprise a first heat exchange effect body group, a second heat exchange effect body group, a third heat exchange effect body group and a fourth heat exchange effect body group, and the first heat exchange effect body group, the second heat exchange effect body group, the third heat exchange effect body group and the fourth heat exchange effect body group are all connected to the lower end of the cleaning pipeline; one side of the first heat exchange effect body group is provided with a connecting pipeline A, the connecting pipeline A is communicated with the cleaning pipeline, and one side of the connecting pipeline A is connected with a feeding pipe A. The invention can soften the generated supernatant, effectively avoid the influence of impurities in the circulating cleaning liquid on the spraying system, improve the cleaning efficiency of the device and prolong the cleaning period.
Description
Technical Field
The invention relates to the technical field of seawater desalination, in particular to a low-temperature multi-effect seawater desalination cleaning sludge online removal system.
Background
At present, a low-temperature multi-effect seawater desalination system is a mainstream technical scheme for desalinating seawater at home and abroad, and the system generally utilizes low-quality steam to heat seawater to distill desalinated water. Although the system adopts a low-temperature vacuum evaporation mode, the evaporation temperature in the device is controlled below 75 ℃, certain scale-forming preventing processes are adopted from the design, and in order to prevent a large amount of scale from forming on the heat exchange tube in the operation process, agents such as scale inhibitors, defoaming agents and the like are usually added, but certain scale still forms on the surface of the heat exchange tube in the long-term operation process, the heat transfer and water production energy consumption of the system are influenced, the large consumption of steam and the rising of water production price are caused, the safe and stable operation of the device is seriously threatened, the chemical cleaning is a main means for effectively solving the problems, and the system cleaning is usually carried out every 2-3 years of operation of equipment. The cleaning process comprises the steps of adding a certain amount of acid and other agents, adding the inside of a heat exchange effect body, washing the heat exchange tube in a spraying mode from top to bottom, recovering bottom water, circularly cleaning by using a cleaning circulating pump, and finally cleaning and peeling off dirt on the surface of the heat exchange tube, wherein the dirt removing amount can reach over 90 percent generally, and the test proves that the effect is obvious.
However, in the prior art, the prior art relates to a chemical cleaning process of a low-temperature multi-effect seawater desalination device, the prior device and related processes are used for assisting a pickling tank, a cleaning pump and a matched pipeline, a part of temporary systems are used for carrying out the cleaning process, and in order to prevent large scales from falling off and blocking a nozzle in the cleaning process, a filter is only arranged in the process, so that other cleaning products cannot be effectively removed on line.
Therefore, the application especially provides a low-temperature multi-effect seawater desalination cleaning sludge online removal system to solve the technical problems.
Disclosure of Invention
The invention provides a low-temperature multi-effect online sludge removal system for seawater desalination cleaning, which can soften the generated supernatant, effectively avoid the influence of impurities in a circulating cleaning solution on a spraying system, improve the cleaning efficiency of a device and prolong the cleaning period.
The technical scheme adopted by the invention for solving the technical problems is as follows: a low-temperature multi-effect seawater desalination cleaning sludge online removal system comprises a cleaning pipeline, a pickling tank, a sludge dewatering device, a plurality of heat exchange effect body groups and a plurality of connecting pipelines, wherein the cleaning pipeline is communicated with the heat exchange effect body groups, the pickling tank is communicated with the cleaning pipeline, and the sludge dewatering device is connected with the output end of the pickling tank;
the plurality of heat exchange effect body groups comprise a first heat exchange effect body group, a second heat exchange effect body group, a third heat exchange effect body group and a fourth heat exchange effect body group, and the first heat exchange effect body group, the second heat exchange effect body group, the third heat exchange effect body group and the fourth heat exchange effect body group are all connected to the lower end of the cleaning pipeline;
a connecting pipeline A is arranged on one side of the first heat exchange effect body group, the connecting pipeline A is communicated with the cleaning pipeline, a feeding pipe A is connected to one side of the connecting pipeline A, a feeding pump is connected to the feeding pipe A, the feeding pipe A is communicated with the cleaning pipeline through a connecting pipeline B, a water outlet pipe C is connected to the lower end of the third heat exchange effect body group, a feeding pipe D is connected to one side of the water outlet pipe C, a feeding pump D is connected to the feeding pipe D, a connecting pipeline F is arranged on one side of the feeding pipe close to the fourth heat exchange effect body group, and the feeding pipe is communicated with the connecting pipeline F;
connecting line F's one end with wash intercommunication each other between the pipeline, intercommunication each other between connecting line's the other end and the pickling jar, the internally mounted of pickling jar has aeration equipment for carry out the disturbance to pickling jar internal liquid, be connected with EDI softening installation in the top of pickling jar, be connected with the filter mechanism in EDI softening installation's top, the filter mechanism passes through conveyer pipe B and sludge dewatering device interconnect, the lower extreme of pickling jar is connected with conveyer pipe A, is connected with the screw rod delivery pump on conveyer pipe A, the pickling jar pass through conveyer pipe A with sludge dewatering device interconnect.
Further, filtering mechanism is including soft water filter, active carbon filter and quartz sand filter, soft water filter's input with EDI softening installation interconnect, soft water filter's output and active carbon filter input interconnect, active carbon filter's output and quartz sand filter's input interconnect, quartz sand filter's output with conveyer pipe B interconnect be connected with the pressure boost return water pump on the conveyer pipe B.
Further, the lower extreme of fourth heat transfer is imitated the body group and is connected with water drainage pipeline, is connected with circulating line C in one side of water drainage pipeline, circulating line C with communicate each other between the connecting line A, be connected with a plurality of salt solution buffer tanks on water drainage pipeline.
Furthermore, one side of the pickling tank is connected with a circulation pipeline A, and a mixing heater and a circulation pump are connected to the circulation pipeline A.
Furthermore, one side of the pickling tank close to the circulating pipeline C is connected with a circulating pipeline B, the circulating pipeline B is communicated with the water outlet pipe C, and the circulating pipeline B is connected with a pickling pump and an injection mixer.
Furthermore, the lower end of the second heat exchange effect body group is connected with a water outlet pipe B, the lower end of the water outlet pipe B is communicated with the circulating pipeline C, one side of the water outlet pipe B is connected with a feeding pipe C, a feeding pump C is connected onto the feeding pipe C, and the feeding pipe C is communicated with the cleaning pipeline through a connecting pipeline D.
Furthermore, the lower extreme of first heat transfer is imitated the body group and is connected with outlet pipe A, outlet pipe A's lower extreme with circulation pipeline C communicates each other, is connected with pan feeding pipe B in one side of outlet pipe A, is connected with feeding pump B on pan feeding pipe B, pan feeding pipe B through connecting line C with wash and communicate each other between the pipeline.
Further, be connected with washing filter, sampling tube and filter on the connecting line F, the filter is used for impurity and the large granule of prefiltration aquatic.
Further, a sludge removal and transportation vehicle is arranged on one side of the sludge dewatering device, the output end of the sludge dewatering device is mutually connected with the sludge removal and transportation vehicle, and the sludge removal and transportation vehicle is used for conveying the removed sludge after deposition.
Further, the connecting pipeline A is connected with a falling film condenser, and the falling film condenser is used for exchanging heat for liquid in the connecting pipeline A.
The invention has the advantages that: the invention provides a low-temperature multi-effect seawater desalination cleaning sludge online removal system, which has the following advantages:
according to the invention, an EDI softening device is connected above a pickling tank, a filtering mechanism is connected above the EDI softening device, the filtering mechanism is connected with a sludge dewatering device through a conveying pipe B, the EDI softening device adopts an ion exchange principle, can soften deslimed clear water, can remove scale ions such as calcium, magnesium and the like in the water, and can perform pre-treatment and filtering on sludge in a cleaning solution, so that blockage of dirt in the water on a spray system nozzle in the cleaning process can be avoided.
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 embodiments or the prior art descriptions 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 diagram of an online sludge removal system for seawater desalination cleaning according to the present invention;
wherein:
1. cleaning a pipeline; 2. A connecting pipeline A; 3. A falling film condenser;
4. a feeding pipe A; 5. A feeding pump A; 6. A connecting pipeline B;
7. a first heat exchange effect body group; 8. A water outlet pipe A; 9. A feeding pipe B;
10. a feeding pump B; 11. A connecting pipeline C; 12. A second heat exchange effect body group;
13. a water outlet pipe B; 14. A feeding pipe C; 15. A feeding pump C;
16. connecting a pipeline D; 17. A third heat exchange effect body group; 18. A water outlet pipe C;
19. a feeding pipe D; 20. A feeding pump D; 21. A connecting pipeline E;
22. cleaning the filter; 23. A sampling tube; 24. A fourth heat exchange effect body group;
25. a connecting pipeline F; 26. A filter; 27. A pickling tank;
28. a circulation line A; 29. A mixing heater; 30. A circulation pump;
31. an aeration device; 32. A conveying pipe A; 33. A screw transfer pump;
34. a sludge dewatering device; 35. A sludge clearing and transporting vehicle; 36. An EDI softening unit;
37. a soft water filter; 38. An activated carbon filter; 39. A quartz sand filter;
40. a delivery pipe B; 41. A pressure boosting water return pump; 42. A circulation line B;
43. a drain line; 44. A saline buffer tank; 45. A pickling pump;
46. a jet mixer; 47. And a circulation line C.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly specified or limited, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, 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:
fig. 1 is a schematic structural diagram of an online sludge removal system for seawater desalination cleaning, which is shown in fig. 1 and comprises a cleaning pipeline 1, a pickling tank 27, a sludge dewatering device 34, a plurality of heat exchange effect body sets and a plurality of connecting pipelines, wherein the cleaning pipeline 1 is communicated with the heat exchange effect body sets, the pickling tank 27 is communicated with the cleaning pipeline 1, the sludge dewatering device 34 is connected with the output end of the pickling tank 27, the pickling tank 27 is used for storing and dissolving cleaning agent solution, a sludge removal vehicle 35 is arranged on one side of the sludge dewatering device 34, the output end of the sludge dewatering device 34 is connected with the sludge removal vehicle 35, the sludge removal vehicle 35 is used for depositing and conveying removed sludge, and the sludge removal vehicle 35 is used for depositing and conveying the sludge removed by the sludge removal device 34 to a sludge plant;
the cleaning pipeline comprises a plurality of heat exchange effect body groups, wherein the heat exchange effect body groups comprise a first heat exchange effect body group 7, a second heat exchange effect body group 12, a third heat exchange effect body group 17 and a fourth heat exchange effect body group 24, the first heat exchange effect body group 7, the second heat exchange effect body group 12, the third heat exchange effect body group 17 and the fourth heat exchange effect body group 24 are all connected to the lower end of a cleaning pipeline 1, each heat exchange effect body group in the cleaning pipeline comprises a plurality of heat exchange effect bodies, the heat exchange effect bodies adopt heat exchange effect body structures in the prior art, a plurality of heat exchange tube bundles and spray tube bundles are arranged inside the heat exchange effect bodies, an acid cleaning solution is uniformly distributed on the outer wall surfaces of the heat exchange tube bundles through the spray tube bundles in an acid cleaning process, and sediment scale samples on the outer walls of the heat exchange tube bundles are dissolved and stripped, and removed, and the cleaning pipeline 1 in the cleaning pipeline is fixedly connected with the heat exchange effect body groups and a cleaning bypass, and is used for conveying and receiving backflow acid cleaning solution;
in the invention, one side of a first heat exchange effect body group 7 is provided with a connecting pipeline A2, the connecting pipeline A2 is communicated with a cleaning pipeline 1, the connecting pipeline A2 is connected with a falling film condenser 3, the falling film condenser 3 is used for exchanging heat of liquid in the connecting pipeline A2, one side of the connecting pipeline A2 is connected with a feeding pipe A4, the feeding pipe A4 is connected with a feeding pump, the feeding pipe A4 is communicated with the cleaning pipeline 1 through a connecting pipeline B6, the lower end of a third heat exchange effect body group 17 is connected with a water outlet pipe C18, one side of the water outlet pipe C18 is connected with a feeding pipe D19, the feeding pipe D19 is connected with a feeding pump D20, one side of the feeding pipe close to a fourth heat exchange effect body group 24 is provided with a connecting pipeline F25, the feeding pipe is communicated with the connecting pipeline F25, the lower end of the first heat exchange effect body group 7 is connected with a water outlet pipe A8, the lower end of the water outlet pipe A8 is communicated with the circulation pipeline C47, one side of the water outlet pipe A8 is connected with a feeding pipe B9, the feeding pipe B9 is connected with a feeding pump B10, the feeding pipe B9 is communicated with the cleaning pipeline 1 through a connecting pipeline C11, the lower end of the second heat exchange effect body group 12 is connected with a water outlet pipe B13, the lower end of the water outlet pipe B13 is communicated with the circulation pipeline C47, one side of the water outlet pipe B13 is connected with a feeding pipe C14, the feeding pipe C14 is connected with a feeding pump C15, the feeding pipe C14 is communicated with the cleaning pipeline 1 through a connecting pipeline D16, the lower end of the fourth heat exchange effect body group 24 is connected with a drainage pipeline 43 for discharging seawater into the pickling tank 27, one side of the drainage pipeline 43 is connected with the circulation pipeline C47, the circulation pipeline C47 is communicated with the connecting pipeline A2, the drainage pipeline 43 is connected with a plurality of brine buffer tanks 44, the invention connects with and washes the filter 22, sampling tube 23 and filter 26 on the connecting line F25, the function of the filter 26 lies in intercepting the medicament and disposes the impurity granule of dissolution process, the supplementary wash passway is each other for subsequent use at the same time, connect with the complex acid circulating valve separately in outlet port and entrance point of the filter 26 of the jet mixer 46, its function lies in switching over the internal circulation system and external circulation system;
one end of a connecting pipeline F25 in the invention is communicated with the cleaning pipeline 1, the other end of the connecting pipeline is communicated with a pickling tank 27, an aeration device 31 is arranged in the pickling tank 27, the aeration device 31 adopts the existing aeration device 31 and comprises a plurality of aeration nozzles, the function of the aeration device is to promote the medicament mixing and dissolving process and is used for disturbing the liquid in the pickling tank 27, an EDI softening device 36 is connected above the pickling tank 27, a filtering mechanism is connected above the EDI softening device 36 and is connected with a sludge dewatering device 34 through a conveying pipe B40, the lower end of the pickling tank 27 is connected with a conveying pipe A32, a screw conveying pump 33 is connected on the conveying pipe A32, the pickling tank 27 is connected with the sludge dewatering device 34 through the conveying pipe A32, and the screw conveying pump 33 can convey sludge mixed liquid deposited at the bottom of the pickling tank 27 to the sludge dewatering device 34 in an oriented mode and can remove the sludge mixed liquid on line through the sludge dewatering device 34;
the filtering mechanism comprises a soft water filter 37, an active carbon filter 38 and a quartz sand filter 39, wherein the input end of the soft water filter 37 is connected with the EDI softening device 36, the output end of the soft water filter 37 is connected with the input end of the active carbon filter 38, the output end of the active carbon filter 38 is connected with the input end of the quartz sand filter 39, the output end of the quartz sand filter 39 is connected with the conveying pipe B40, the conveying pipe B40 is connected with a pressure water return pump 41, a supernatant solution generated by the sludge dewatering device 34 is softened by the pressure water return pump 41, and then flows back to the pickling tank 27 for recycling, the water return pump is used for providing power for conveying the softening process solution, the quartz sand filter 39 and the soft water filter 37 can intercept large-particle impurities in the supernatant solution, the active carbon filter 26 can adsorb impurities in the supernatant solution, and the EDI softening device 36 can remove ions such as calcium, magnesium and the like in the scaling water by adopting an ion exchange principle. When raw water containing hardness ions passes through the resin layer in the exchanger, calcium and magnesium ions in the water are replaced with sodium ions adsorbed by the resin, the resin adsorbs the calcium and magnesium ions, and the sodium ions enter the water, so that the water flowing out of the exchanger is softened water with hardness removed. Because the hardness of water is mainly formed by calcium and magnesium, cation exchange resin (water softener) is generally adopted to replace Ca2+ and Mg2+ (main components forming scale) in the water, and the effectiveness of the resin in removing the Ca2+ and the Mg2+ is gradually reduced along with the increase of the Ca2+ and the Mg2+ in the resin;
according to the invention, a circulation pipeline A28 is connected to one side of a pickling tank 27, a mixing heater 29 and a circulating pump 30 are connected to the circulation pipeline A28, the mixing heater 29 has the effect of dissolving the pickling agent in the pickling tank 27, the mixing heater 29 adopts an external electric heating mode, and has the advantages of high adjustment precision and sensitive reaction, the circulating pump 30 and the mixing heater 29 are connected in series, and the reflux quantity of the circulating pump 30 and the heat efficiency of the mixing heater 29 can be freely adjusted to realize independent control of the circulating pump 30 and the mixing heater 29; a circulation pipeline B42 is connected to one side of the pickling tank 27 close to the circulation pipeline C47, the circulation pipeline B42 is communicated with the water outlet pipe C18, a pickling pump 45 and a jet mixer 46 are connected to the circulation pipeline B42, the pickling pump 45 is used for accelerating the medicament dissolution process through internal circulation and conveying pickling water to the inlet end of the circulation pump 30 through external circulation, and the jet mixer 46 is arranged at the outlet end of the pickling pump 45 and is used for sucking concentrated acid liquor and fully mixing the concentrated acid liquor with the existing pickling medicament in the circulation process of the pickling pump 45;
the online sludge removal principle of the invention comprises the following steps:
step 1: before the system is cleaned, firstly, clear water with more than two thirds of volume is injected into the pickling tank 27, then the pickling pump 45 is started, and simultaneously, the valve on the circulating pipeline B42 is opened and the valve on the cleaning pipeline 1 is closed to carry out solution circulation to prepare for dispensing;
and 2, step: then adding a certain amount of solid medicament into the upper part of the pickling tank 27 or adding liquid medicament from a jet mixer 46, wherein the jet mixer 46 is a three-way suction device with a throat pipe arranged inside, and the liquid medicament is further sucked by utilizing the hydraulic jet power of a pickling pump 45 and the negative pressure formed by a suction inlet positioned at the side of the throat pipe;
and step 3: the filter 26 can preliminarily filter impurities and large particles in the returned water in the acid preparation process and the normal acid washing and returning process, so that the treatment burden of a subsequent system is reduced;
and 4, step 4: starting the mixed heating device to increase the temperature of the cleaning solution so as to achieve an ideal cleaning effect, reduce the usage amount of the medicine, and increase the temperature to a proper temperature by adjusting the heating power of the heater;
and 5: the aeration device 31 is started to increase the disturbance of the liquid in the pickling tank 27, and the full dissolution and mixing of the medicament are realized under the condition that the pickling tank 27 is not provided with a stirrer;
step 6: after the pickling tank 27 is fully dissolved and mixed for dispensing, the valve on the circulating pipeline B42 is closed, the valve on the cleaning pipeline 1 is opened, the pickling solution is conveyed to the bottoms of the heat exchange effect body groups and the inlet of the circulating pump 30, large scale and impurities generated in the circulating cleaning process are further filtered through the cleaning filter 22, and then the washing solution is sprayed to the upper parts of the heat exchange effect body groups through the cleaning pipeline 1 for circulating cleaning;
and 7: if the concentration of the acid washing liquid which flows back in the cleaning process does not meet the requirement, solid or liquid can be continuously injected into the acid washing tank 27 and enters the system for circular cleaning;
and step 8: the returned pickling solution carries dissolved impurities such as scale and sludge, the impurities are continuously deposited at the bottom of the pickling tank 27 (in the process, the pickling pump 45 and the circulating pump 30 are both in an operating state), the impurities are conveyed to the sludge dewatering device 34 through the screw conveying pump 33 at the bottom of the pickling tank 27, the generated concentrated sludge is conveyed to a designated place for treatment through the sludge cleaning vehicle 35, the generated supernatant is conveyed to the soft water filter 37, the activated carbon filter 38, the quartz sand filter 39 and the EDI softening device 36 through the pressurizing water return pump 41, and the treated water returns to the pickling tank 27 again and participates in the next cleaning cycle.
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. A low-temperature multi-effect seawater desalination cleaning sludge online removal system comprises a cleaning pipeline (1), a pickling tank (27), a sludge dewatering device (34), a plurality of heat exchange effect body sets and a plurality of connecting pipelines, wherein the cleaning pipeline (1) is communicated with the heat exchange effect body sets, the pickling tank (27) is communicated with the cleaning pipeline (1), and the sludge dewatering device (34) is connected with the output end of the pickling tank (27);
the method is characterized in that: the multiple heat exchange effect body groups comprise a first heat exchange effect body group (7), a second heat exchange effect body group (12), a third heat exchange effect body group (17) and a fourth heat exchange effect body group (24), and the first heat exchange effect body group (7), the second heat exchange effect body group (12), the third heat exchange effect body group (17) and the fourth heat exchange effect body group (24) are all connected to the lower end of the cleaning pipeline (1);
a connecting pipeline A (2) is arranged on one side of the first heat exchange effect body group (7), the connecting pipeline A (2) is communicated with the cleaning pipeline (1), a feeding pipe A (4) is connected to one side of the connecting pipeline A (2), a feeding pump is connected to the feeding pipe A (4), the feeding pipe A (4) is communicated with the cleaning pipeline (1) through a connecting pipeline B (6), a water outlet pipe C (18) is connected to the lower end of the third heat exchange effect body group (17), a feeding pipe D (19) is connected to one side of the water outlet pipe C (18), a feeding pump D (20) is connected to the feeding pipe D (19), a connecting pipeline F (25) is arranged on one side, close to the fourth heat exchange effect body group (24), of the feeding pipe, and the connecting pipeline F (25) are communicated with each other;
the one end of connecting line F (25) with wash intercommunication each other between pipeline (1), communicate each other between the other end of connecting line and pickling tank (27), the internally mounted of pickling tank (27) has aerating device (31) for liquid disturbs in pickling tank (27), is connected with EDI softening installation (36) in the top of pickling tank (27), is connected with filtering mechanism in the top of EDI softening installation (36), and filtering mechanism passes through conveyer pipe B (40) and sludge dewatering device (34) interconnect, the lower extreme of pickling tank (27) is connected with conveyer pipe A (32), is connected with screw rod delivery pump (33) on conveyer pipe A (32), pickling tank (27) through conveyer pipe A (32) with sludge dewatering device (34) interconnect.
2. The on-line sludge removal system for the low-temperature multi-effect seawater desalination cleaning according to claim 1, characterized in that: filtering mechanism is including soft water filter (37), activated carbon filter (38) and quartz sand filter (39), the input of soft water filter (37) with EDI softening installation (36) interconnect, the output of soft water filter (37) and activated carbon filter (38) input interconnect, the output of activated carbon filter (38) and the input interconnect of quartz sand filter (39), the output of quartz sand filter (39) with conveyer pipe B (40) interconnect be connected with pressure boost return water pump (41) on conveyer pipe B (40).
3. The system for online removal of the low-temperature multi-effect seawater desalination cleaning sludge according to claim 1, is characterized in that: the lower extreme of fourth heat transfer is imitated body group (24) and is connected with drain line (43), is connected with circulation pipeline C (47) in one side of drain line (43), circulation pipeline C (47) with intercommunication each other between connecting line A (2), be connected with a plurality of salt solution buffer tanks (44) on drain line (43).
4. The system for online removal of the low-temperature multi-effect seawater desalination cleaning sludge according to claim 1, is characterized in that: one side of the pickling tank (27) is connected with a circulation pipeline A (28), and a mixing heater (29) and a circulation pump (30) are connected to the circulation pipeline A (28).
5. The system for online removal of the low-temperature multi-effect seawater desalination cleaning sludge according to claim 3, characterized in that: one side of the pickling tank (27) close to the circulating pipeline C (47) is connected with a circulating pipeline B (42), the circulating pipeline B (42) is communicated with the water outlet pipe C (18), and a pickling pump (45) and a jet mixer (46) are connected to the circulating pipeline B (42).
6. The system for online removal of the low-temperature multi-effect seawater desalination cleaning sludge according to claim 3, characterized in that: the lower extreme of second heat transfer is imitated body group (12) and is connected with outlet pipe B (13), the lower extreme of outlet pipe B (13) with circulation pipeline C (47) communicates each other, is connected with pan feeding pipe C (14) in one side of outlet pipe B (13), is connected with feeding pump C (15) on pan feeding pipe C (14), pan feeding pipe C (14) through connecting tube D (16) with wash and communicate each other between the pipeline (1).
7. The system for online removal of the low-temperature multi-effect seawater desalination cleaning sludge according to claim 3, characterized in that: the lower extreme of first heat transfer efficiency body group (7) is connected with outlet pipe A (8), the lower extreme of outlet pipe A (8) with circulation pipeline C (47) communicate each other, is connected with pan feeding pipe B (9) in one side of outlet pipe A (8), is connected with feeding pump B (10) on pan feeding pipe B (9), pan feeding pipe B (9) through connecting tube C (11) with wash and communicate each other between the pipeline (1).
8. The system for online removal of the low-temperature multi-effect seawater desalination cleaning sludge according to claim 1, is characterized in that: the connecting pipeline F (25) is connected with a cleaning filter (22), a sampling tube (23) and a filter (26), and the filter (26) is used for preliminarily filtering impurities and large particles in the backwater.
9. The system for online removal of the low-temperature multi-effect seawater desalination cleaning sludge according to claim 1, is characterized in that: one side of the sludge dewatering device (34) is provided with a sludge removal vehicle (35), the output end of the sludge dewatering device (34) is connected with the sludge removal vehicle (35), and the sludge removal vehicle (35) is used for conveying the removed sludge after deposition.
10. The system for online removal of the low-temperature multi-effect seawater desalination cleaning sludge according to claim 1, is characterized in that: the falling film condenser (3) is connected to the connecting pipeline A (2), and the falling film condenser (3) is used for exchanging heat for liquid in the connecting pipeline A (2).
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| JP2003093992A (en) * | 2001-09-26 | 2003-04-02 | Iwai Kikai Kogyo Co Ltd | Method for cleaning equipment to be cleaned of fluid product manufacturing apparatus, etc., and apparatus for cleaning the equipment automatically |
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| CN102094211A (en) * | 2009-12-14 | 2011-06-15 | 中国神华能源股份有限公司 | Acid washing system of low-temperature multi-effect seawater desalting equipment |
| CN103253818A (en) * | 2013-04-19 | 2013-08-21 | 金逹行有限公司 | Seawater desalination, resource comprehensive utilization and zero discharge processing system |
| CN209636030U (en) * | 2019-01-30 | 2019-11-15 | 青岛中亚环保工程有限公司 | A kind of seawater desalination system with on-line cleaning device |
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| JP2003093992A (en) * | 2001-09-26 | 2003-04-02 | Iwai Kikai Kogyo Co Ltd | Method for cleaning equipment to be cleaned of fluid product manufacturing apparatus, etc., and apparatus for cleaning the equipment automatically |
| US20050040115A1 (en) * | 2002-01-22 | 2005-02-24 | Reinhard Fred P. | Advanced electrodeionization for fluid recycling |
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| CN102094211A (en) * | 2009-12-14 | 2011-06-15 | 中国神华能源股份有限公司 | Acid washing system of low-temperature multi-effect seawater desalting equipment |
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