CN115159602B - Low-temperature multi-effect seawater desalination cleaning sludge on-line removal system - Google Patents
Low-temperature multi-effect seawater desalination cleaning sludge on-line removal system Download PDFInfo
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- CN115159602B CN115159602B CN202210833687.1A CN202210833687A CN115159602B CN 115159602 B CN115159602 B CN 115159602B CN 202210833687 A CN202210833687 A CN 202210833687A CN 115159602 B CN115159602 B CN 115159602B
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- exchange effect
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- 238000004140 cleaning Methods 0.000 title claims abstract description 100
- 239000010802 sludge Substances 0.000 title claims abstract description 68
- 239000013535 sea water Substances 0.000 title claims abstract description 25
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 78
- 238000005554 pickling Methods 0.000 claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000012535 impurity Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 21
- 239000006004 Quartz sand Substances 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000008234 soft water Substances 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 8
- 239000011552 falling film Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 239000012267 brine Substances 0.000 claims description 3
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 2
- 239000002253 acid Substances 0.000 description 10
- 239000003814 drug Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 239000007921 spray Substances 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
- 239000007787 solid Substances 0.000 description 5
- 239000010414 supernatant solution Substances 0.000 description 4
- 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
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000012459 cleaning agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material 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
- 230000002411 adverse Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011033 desalting Methods 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
- 238000009434 installation Methods 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
- 238000002203 pretreatment Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002455 scale inhibitor Substances 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
Classifications
-
- 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
Abstract
The application relates to the technical field of sea water desalination, in particular to a low-temperature multi-effect sea water desalination cleaning sludge on-line removal system which 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 plurality of 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; 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 application can soften the generated supernatant, effectively avoid the influence of impurities in the circulating cleaning liquid on a spraying system, improve the cleaning efficiency of the device and prolong the cleaning period.
Description
Technical Field
The application relates to the technical field of sea water desalination, in particular to a low-temperature multi-effect sea water desalination cleaning sludge on-line removal system.
Background
At present, a low-temperature multi-effect sea water desalination system is a main stream technical scheme for sea water desalination and water production at home and abroad at present, and the system generally utilizes low-quality steam to heat sea water and distill desalinated water. Although the system adopts a low-temperature vacuum evaporation mode to control the evaporation temperature in the device below 75 ℃, adopts a certain scale prevention process from design, and generally adds scale inhibitor, defoamer and other medicaments for preventing scale on the heat exchange tube from being generated in a large amount in the operation process, certain scale generation can be generated 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 affected, the large steam consumption and the water production price are increased, the safe and stable operation of the device is seriously threatened, and 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 is to add a certain amount of acid and some other agents into the heat exchange effect body, wash the heat exchange tube by a spray mode from top to bottom, recycle bottom water, and finally clean and strip the scale on the surface of the heat exchange tube by a cleaning circulating pump, wherein the scale removal amount can reach more than 90%, and the test shows that the conventional cleaning mode is obvious at present, the conventional cleaning mode is usually to use the conventional system, connect a temporary pipeline through a pickling tank (or a pickling vehicle), connect a spray system of a low-temperature multi-effect seawater desalination device to be cleaned, inject a certain amount of cleaning liquid (mainly an acid substance) for multiple cleaning circulation after injecting clear water circulation, and finally achieve the purpose of removing the scale on the surface of the heat exchange tube.
However, the prior art in the prior art relates to a chemical cleaning process of a low-temperature multi-effect sea water desalting device, the prior device and related process are utilized to assist an acid pickling tank, a cleaning pump and a matched pipeline, and a part of temporary system is utilized to develop a cleaning process, so that a nozzle is blocked by preventing massive scale from falling off in the cleaning process, and only a filter is arranged in the process, so that other cleaning products cannot be effectively removed on line.
In order to solve the technical problems, the application particularly provides a low-temperature multi-effect seawater desalination cleaning sludge on-line removal system.
Disclosure of Invention
The application provides a low-temperature multi-effect seawater desalination cleaning sludge on-line removal system, which can soften the generated supernatant, effectively avoid the influence of impurities in circulating cleaning liquid on a spraying system, improve the cleaning efficiency of a device and prolong the cleaning period.
The technical scheme adopted by the application for solving the technical problems is as follows: the low-temperature multi-effect seawater desalination cleaning sludge on-line 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 plurality of 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;
one end of the connecting pipeline F is communicated with the cleaning pipeline, the other end of the connecting pipeline is communicated with the pickling tank, an aeration device is arranged in the pickling tank and used for disturbing liquid in the pickling tank, an EDI softening device is connected above the pickling tank, a filtering mechanism is connected above the EDI softening device and connected with the sludge dewatering device through a conveying pipe B, the lower end of the pickling tank is connected with a conveying pipe A, a screw conveying pump is connected to the conveying pipe A, and the pickling tank is connected with the sludge dewatering device through the conveying pipe A.
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 back water pump on the conveyer pipe B.
Further, the lower extreme of fourth heat transfer body group is connected with drainage pipe, is connected with circulation pipeline C in one side of drainage pipe, circulation pipeline C with link line A is mutual to be linked together, is connected with a plurality of salt water buffer tanks on the drainage pipe.
Further, one side of the pickling tank is connected with a circulating pipeline A, and the circulating pipeline A is connected with a mixed heater and a circulating pump.
Further, one side of the pickling tank, which is 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.
Further, the lower extreme of second heat exchange effect body group is connected with outlet pipe B, outlet pipe B's lower extreme with circulation pipeline C communicates each other, is connected with pan feeding pipe C in one side of outlet pipe B, is connected with pan feeding pump C on pan feeding pipe C, pan feeding pipe C through connecting line D with communicate each other between the washing pipeline.
Further, the lower extreme of the first heat exchange effect body group 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 outlet pipe A's one side, is connected with pan feeding pump B on pan feeding pipe B, pan feeding pipe B through connecting line C with communicate each other between the washing pipeline.
Further, the connecting pipeline F is connected with a cleaning filter, a sampling tube and a filter, and the filter is used for preliminarily filtering impurities and large particles in backwater.
Further, a sludge clearing and transporting vehicle is arranged on one side of the sludge dewatering device, the output end of the sludge dewatering device is connected with the sludge clearing and transporting vehicle, and the sludge clearing and transporting vehicle is used for conveying removed sludge after being deposited.
Further, the connecting pipeline A is connected with a falling film condenser, and the falling film condenser is used for exchanging heat to liquid in the connecting pipeline A.
The application has the advantages that: the application provides a low-temperature multi-effect seawater desalination cleaning sludge on-line removal system, which has the following advantages:
the application is connected with the EDI softening device above the pickling tank, the filtering mechanism is connected with the sludge dewatering device above the EDI softening device, the filtering mechanism is connected with the sludge dewatering device through the conveying pipe B, the EDI softening device adopts an ion exchange principle, clean water after desliming can be softened, scaling ions such as calcium, magnesium and the like in the water can be removed, the sludge in the cleaning liquid is subjected to pre-treatment and filtration, the blockage of spray nozzles by dirt in the water in the cleaning process can be avoided, the influence of impurities in the circulating cleaning liquid on the spray system can be avoided, the cleaning efficiency of the device is improved, the cleaning period is prolonged, the application can intercept large particle impurities in the supernatant solution through the quartz sand filter and the soft water filter, the suspended solid impurities in the cleaning solution can be adsorbed through the activated carbon filter, the problem of secondary pollution of the cleaning liquid caused by the re-backflow of the impurities in the cleaning liquid can be effectively avoided, the cleaning effect is further improved, the cleaning period is prolonged, the cleaning flow is simple, the control is easy, the manual intervention is less, the efficiency is high, the consumption of the cleaning agent is reduced, the adverse components in the cleaning process can be removed through the dewatering device, the subsequent solid and the environmental protection treatment waste liquid is up to the standard is realized, and the following environmental protection treatment waste is realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the on-line seawater desalination cleaning sludge removal system;
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 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 group;
13. a water outlet pipe B; 14. A feeding pipe C; 15. A feeding pump C;
16. a connecting pipeline D; 17. A third heat exchange effect 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 group;
25. a connecting pipeline F; 26. A filter; 27. A pickling tank;
28. a circulation pipeline A; 29. A hybrid heater; 30. A circulation pump;
31. an aeration device; 32. A conveying pipe A; 33. A screw conveying pump;
34. a sludge dewatering device; 35. A sludge cleaning and transporting vehicle; 36. An EDI softening device;
37. a soft water filter; 38. An activated carbon filter; 39. A quartz sand filter;
40. a conveying pipe B; 41. A booster water return pump; 42. A circulation pipeline B;
43. a drainage pipeline; 44. A brine buffer tank; 45. A pickling pump;
46. a jet mixer; 47. And a circulation pipeline C.
Detailed Description
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the description of the present application, it should be noted that unless explicitly stated and limited otherwise, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, but rather the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
Example 1:
fig. 1 is a schematic diagram of a system for on-line removing seawater desalination cleaning sludge, 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 groups and a plurality of connecting pipelines, wherein the cleaning pipeline 1 is communicated with the plurality of heat exchange effect body groups, 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 cleaning 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 cleaning vehicle 35, the sludge cleaning vehicle 35 is used for conveying removed sludge after being deposited, and the sludge cleaning vehicle 35 is used for conveying the sludge removed by the sludge dewatering device 34 to a sludge factory after being deposited;
the application discloses a plurality of heat exchange effect body groups, which 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, wherein 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 application consists of a plurality of heat exchange effect bodies, the heat exchange effect bodies adopt a heat exchange effect body structure in the prior art, a plurality of heat exchange tube bundles and spray tube bundles are arranged in the heat exchange effect body, pickling solution is uniformly distributed on the outer wall surfaces of the heat exchange tube bundles through the spray tube bundles in the pickling cleaning process, and scale deposition samples are dissolved and stripped on the outer wall surfaces of the heat exchange tube bundles, and the cleaning pipeline 1 in the application is fixedly connected with the plurality of heat exchange effect bodies and a cleaning router and is used for conveying and receiving reflux pickling solution;
one side of a first heat exchange effect body group 7 in the application is provided with a connecting pipeline A2, the connecting pipeline A2 is communicated with the cleaning pipeline 1, a falling film condenser 3 is connected on the connecting pipeline A2, the falling film condenser 3 is used for exchanging heat for 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 circulating 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 circulating 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 C47 is connected with the connecting pipeline A2, the circulation pipeline C47 is communicated with the connecting pipeline A2, a plurality of brine buffer tanks 44 are connected on the drainage pipeline 43, the application is connected with a cleaning filter 22, a sampling tube 23 and a filter 26 on a connecting pipeline F25, the filter 26 has the function of intercepting impurity particles in the process of preparing and dissolving medicaments, meanwhile, auxiliary cleaning passers-by devices are mutually standby, and the outlet end of an injection mixer 46 and the inlet end of the filter 26 are respectively connected with an acid preparation circulating valve which has the function of switching an inner circulating system and an outer circulating system;
one end of a connecting pipeline F25 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 at present and comprises a plurality of aeration nozzles which are used for promoting the mixing and dissolving process of medicaments and are used for disturbing 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, the filtering mechanism 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 onto 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 be used for directionally conveying sludge mixed liquid deposited at the bottom of the pickling tank 27 to the sludge dewatering device 34 and removing the sludge mixed liquid on line through the sludge dewatering device 34;
the filtering mechanism comprises a soft water filter 37, an activated 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 activated carbon filter 38, the output end of the activated 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 booster water return pump 41, the supernatant solution generated by the sludge dewatering device 34 is returned to the pickling tank 27 for recycling after being softened by the booster water return pump 41, the quartz sand filter 39, the activated carbon filter 38, the soft water filter 37 and the EDI softening device 36, the water return pump is used for supplying power for conveying the solution in the softening process, the quartz sand filter 39 and the soft water filter 37 can intercept large particle impurities in the supernatant solution, the activated carbon filter 26 can adsorb suspended solid impurities in the supernatant solution, and the EDI softening device 36 can remove calcium, magnesium plasma scaling in the water by adopting an ion exchange principle. When the raw water containing hardness ions passes through the resin layer in the exchanger, the calcium and magnesium ions in the water are replaced with sodium ions adsorbed by the resin, and 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 the hardness removed. Because the hardness of water is mainly formed and expressed 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 efficacy of the resin in removing Ca2+ and Mg2+ gradually decreases with the increase of Ca2+ and Mg2+ in the resin;
in the application, one side of the pickling tank 27 is connected with the circulating pipeline A28, the circulating pipeline A28 is connected with the mixed heater 29 and the circulating pump 30, the mixed heater 29 has the effect of circulating the dissolution efficiency of the pickling agent in the pickling tank 27, the mixed heater 29 adopts an external electric heating mode, the advantages of high regulation precision and sensitive reaction are achieved, the circulating pump 30 and the mixed heater 29 are connected in series, and the independent control of the reflux amount of the circulating pump 30 and the thermal efficiency of the mixed heater 29 can be realized by freely regulating the reflux amount of the circulating pump 30; the side of the pickling tank 27, which is close to the circulating pipeline C47, is connected with a circulating pipeline B42, the circulating pipeline B42 is communicated with the water outlet pipe C18, the circulating pipeline B42 is connected with a pickling pump 45 and an injection mixer 46, the pickling pump 45 has the function of accelerating the dissolution process of the medicament by internal circulation and can lead the pickling water which is conveyed by external circulation to be sent to the inlet end of the circulating pump 30, and the injection mixer 46 is arranged at the outlet end of the pickling pump 45 and has the function of sucking concentrated acid liquor and fully mixing the concentrated acid liquor with the existing pickling medicament in the circulating process of the pickling pump 45;
the sludge on-line removal principle of the application comprises the following steps:
step 1: before the system is cleaned, more than two thirds of clean water is injected into the pickling tank 27, then the pickling pump 45 is started, and simultaneously a valve on the circulating pipeline B42 is opened and a valve on the cleaning pipeline 1 is closed for solution circulation, so that preparation is made for dispensing;
step 2: then a certain amount of solid medicament is added to the upper part of the pickling tank 27 or liquid medicament is added from the injection mixer 46, the injection mixer 46 is a three-way suction device with a throat inside, and the liquid medicament is sucked by utilizing the hydraulic injection power of the pickling pump 45 and the negative pressure formed by the suction inlet positioned at the throat side;
step 3: the filter 26 can primarily filter impurities and large particles in the backwater in the process of acid preparation and normal acid washing and backwater, so that the processing load of a subsequent system is reduced;
step 4: starting the mixed heating device to increase the temperature of the cleaning liquid to achieve an ideal cleaning effect, reducing the usage amount of the medicine, and increasing the temperature to a proper temperature by adjusting the heating power of the heater;
step 5: opening the aeration device 31 to increase the disturbance of the liquid in the pickling tank 27, and realizing the full dissolution and mixing of the medicament 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, a valve on a circulating pipeline B42 is closed, a valve on a cleaning pipeline 1 is opened, pickling solution is conveyed to the bottoms of a plurality of heat exchange effect groups and the inlet of a circulating pump 30, and massive scale and impurities generated in the circulating cleaning process are further filtered through a cleaning filter 22 and then sprayed to the upper parts of the plurality of heat exchange effect groups through the cleaning pipeline 1 for circulating cleaning;
step 7: the concentration of the acid washing liquid which flows back in the washing process can not meet the requirement, and the solid or liquid agent can be continuously injected into the acid washing tank 27 and enter the system for circulating washing;
step 8: the returned pickling solution carries dissolved impurities such as scale and sludge, and the like, and is continuously deposited at the bottom of the pickling tank 27 (in the process, the pickling pump 45 and the circulating pump 30 are in an operating state), the impurities are sent 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 sent to a designated place for treatment through the sludge cleaning truck 35, the generated supernatant is sent 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 is returned to the pickling tank 27 again and participates in the next cleaning cycle.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (7)
1. The low-temperature multi-effect seawater desalination cleaning sludge on-line removal system comprises a cleaning pipeline (1), a pickling tank (27), a sludge dewatering device (34), a plurality of heat exchange effect body groups and a plurality of connecting pipelines, wherein the cleaning pipeline (1) is communicated with the plurality of heat exchange effect body groups, 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 plurality of 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);
one side of the first heat exchange effect body group (7) is provided with a connecting pipeline A (2), the connecting pipeline A (2) is communicated with the cleaning pipeline (1), one side of the connecting pipeline A (2) is connected with a feeding pipe A (4), the feeding pipe A (4) is connected with a feeding pump, the feeding pipe A (4) is communicated with the cleaning pipeline (1) through a connecting pipeline B (6), the lower end of the third heat exchange effect body group (17) is connected with a water outlet pipe C (18), one side of the water outlet pipe C (18) is connected with a feeding pipe D (19), one side of the feeding pipe D (19) is connected with a feeding pump D (20), one side of the feeding pipe close to the fourth heat exchange effect body group (24) is provided with a connecting pipeline F (25), and the feeding pipe F (25) is communicated with each other;
one end of the connecting pipeline F (25) is communicated with the cleaning pipeline (1), the other end of the connecting pipeline is communicated with the pickling tank (27), an aeration device (31) is arranged in the pickling tank (27) and used for disturbing 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), the filtering mechanism is connected with a sludge dewatering device (34) through a conveying pipe B (40), the lower end of the pickling tank (27) is connected with a conveying pipe A (32), a screw conveying pump (33) is connected on the conveying pipe A (32), and the pickling tank (27) is connected with the sludge dewatering device (34) through the conveying pipe A (32);
the lower end of the fourth heat exchange effect body group (24) is connected with a drainage pipeline (43), one side of the drainage pipeline (43) is connected with a circulation pipeline C (47), the circulation pipeline C (47) is communicated with the connection pipeline A (2), and a plurality of brine buffer tanks (44) are connected to the drainage pipeline (43);
a circulation pipeline B (42) is connected to one side of the pickling tank (27) close to the circulation pipeline C (47), the circulation 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 circulation pipeline B (42);
the lower extreme of second heat exchange effect body group (12) is connected with outlet pipe B (13), the lower extreme of outlet pipe B (13) with circulation pipeline C (47) intercommunication each other, be connected with pan feeding pipe C (14) in one side of outlet pipe B (13), be connected with pan feeding pump C (15) on pan feeding pipe C (14), pan feeding pipe C (14) through connecting line D (16) with wash between pipeline (1) intercommunication each other.
2. The low-temperature multi-effect seawater desalination cleaning sludge on-line removal system as claimed in claim 1, wherein the system is characterized in that: the filtering mechanism comprises a soft water filter (37), an activated 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 activated carbon filter (38), the output end of the activated 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 B (40), and the conveying pipe B (40) is connected with a pressurizing water return pump (41).
3. The low-temperature multi-effect seawater desalination cleaning sludge on-line removal system as claimed in claim 1, wherein the system is characterized in that: one side of the pickling tank (27) is connected with a circulation pipeline A (28), and the circulation pipeline A (28) is connected with a mixing heater (29) and a circulation pump (30).
4. The low-temperature multi-effect seawater desalination cleaning sludge on-line removal system as claimed in claim 1, wherein the system is characterized in that: the lower extreme of first heat exchange effect body group (7) is connected with outlet pipe A (8), the lower extreme of outlet pipe A (8) with circulation pipeline C (47) intercommunication each other, be connected with pan feeding pipe B (9) in one side of outlet pipe A (8), be connected with pan feeding pump B (10) on pan feeding pipe B (9), pan feeding pipe B (9) through connecting line C (11) with communicate each other between wasing pipeline (1).
5. The low-temperature multi-effect seawater desalination cleaning sludge on-line removal system as claimed in claim 1, wherein the system 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 backwater.
6. The low-temperature multi-effect seawater desalination cleaning sludge on-line removal system as claimed in claim 1, wherein the system is characterized in that: one side of the sludge dewatering device (34) is provided with a sludge clearing and transporting vehicle (35), the output end of the sludge dewatering device (34) is connected with the sludge clearing and transporting vehicle (35), and the sludge clearing and transporting vehicle (35) is used for conveying removed sludge after being deposited.
7. The low-temperature multi-effect seawater desalination cleaning sludge on-line removal system as claimed in claim 1, wherein the system is characterized in that: the connecting pipeline A (2) is connected with a falling film condenser (3), and the falling film condenser (3) is used for exchanging heat with liquid in the connecting pipeline A (2).
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| CN202210833687.1A CN115159602B (en) | 2022-07-14 | 2022-07-14 | Low-temperature multi-effect seawater desalination cleaning sludge on-line removal system |
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| CN202210833687.1A CN115159602B (en) | 2022-07-14 | 2022-07-14 | Low-temperature multi-effect seawater desalination cleaning sludge on-line removal system |
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| CN115159602B true CN115159602B (en) | 2023-12-05 |
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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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6905608B2 (en) * | 2002-01-22 | 2005-06-14 | Exergy Technologies Corporation | Advanced electrodeionization for fluid recycling |
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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 |
| CN201553782U (en) * | 2009-12-14 | 2010-08-18 | 中国神华能源股份有限公司 | Acid pickling system of low-temperature multipurpose sea water desalinization equipment |
| 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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