CN111392830A - Integrated refinery seawater cooling system - Google Patents
Integrated refinery seawater cooling system Download PDFInfo
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- CN111392830A CN111392830A CN202010250483.6A CN202010250483A CN111392830A CN 111392830 A CN111392830 A CN 111392830A CN 202010250483 A CN202010250483 A CN 202010250483A CN 111392830 A CN111392830 A CN 111392830A
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- 239000013535 sea water Substances 0.000 title claims abstract description 124
- 238000001816 cooling Methods 0.000 title claims abstract description 92
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 135
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 126
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229940005991 chloric acid Drugs 0.000 claims abstract description 61
- 238000010612 desalination reaction Methods 0.000 claims abstract description 34
- 239000005708 Sodium hypochlorite Substances 0.000 claims abstract description 22
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims abstract description 22
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000005977 Ethylene Substances 0.000 claims abstract description 9
- 239000013505 freshwater Substances 0.000 claims abstract description 4
- 239000012267 brine Substances 0.000 claims description 38
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 38
- 150000003839 salts Chemical class 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 6
- KQPBSBAEBKRAAU-UHFFFAOYSA-N hypochlorous acid;sodium Chemical compound [Na].ClO KQPBSBAEBKRAAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 description 10
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 8
- 229910052801 chlorine Inorganic materials 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 244000005700 microbiome Species 0.000 description 5
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 101100493712 Caenorhabditis elegans bath-42 gene Proteins 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 235000015598 salt intake Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
A seawater cooling system of an integrated refinery seawater cooling system comprises a water inlet pipeline, a seawater desalination cooling pipeline, a main pipeline and at least one heat exchange cooling pipeline, wherein the water inlet pipeline is respectively communicated with the seawater desalination cooling pipeline and the main pipeline; the first chloric acid electrolysis module can electrolyze seawater in the main pipeline and discharge sodium hypochlorite into a water inlet of the water inlet pipeline; the second chloric acid electrolysis module can electrolyze fresh water of the water desalination cooling pipeline and discharge sodium hypochlorite into a water inlet of the ethylene/PTA system; the third chloric acid electrolysis module can electrolyze seawater in the heat exchange cooling pipeline and discharge sodium hypochlorite into a water inlet of the heat exchanger. The integrated refinery plant seawater cooling system can solve the problems of easy scaling and blockage of finished product dosing.
Description
Technical Field
The invention relates to the technical field of seawater cooling, in particular to an integrated refinery seawater cooling system.
Background
The integrated refinery comprises a plurality of components such as crude oil processing, ethylene production, thermoelectricity and the like, and has large scale and complex process, so that the cooling system has large water consumption, wide dispersion, difficult centralized treatment and high process complexity. To reduce water costs, many coastal refineries typically use seawater directly as the cooling water source. The main problem faced by the use of seawater cooling is the attachment of microorganisms, which directly reduces the heat transfer coefficient of the heat exchange system, and the heat transfer conductivity is reduced by 5% per millimeter of thickness, thereby increasing the power generation cost. In addition, mucus secreted by the attachment points of marine organisms has strong corrosivity to metals, and the chemical corrosion speed under the scales is increased. Most importantly, the attachment of a large amount of marine organisms may also cause blockage of the piping system, affecting safe operation.
Generally add finished product sodium hypochlorite, chlorine spindle etc. in intaking and disinfect among the prior art, thereby the easy crystallization of finished product medicament makes the pipeline appear scale deposit, jam, leads to the recirculated cooling water cooling effect poor, influences the safety in production. The existing coastal power plant also adopts the electrolytic bath to generate sodium hypochlorite on line to kill microorganisms, but the electrolytic bath is directly installed at a water taking port, so that the microorganisms at each section of a cooling pipeline cannot be thoroughly killed, the disinfection effect is poor, and the actual demand cannot be met.
Disclosure of Invention
In view of the above, the invention provides a seawater cooling system for an integrated refinery plant, which can completely replace a finished product dosing system of the original integrated refinery plant, and solve the problems of easy scaling and blockage of finished product dosing.
An integrated refinery seawater cooling system comprises a seawater cooling system, a first chloric acid electrolysis module, a second chloric acid electrolysis module and a third chloric acid electrolysis module;
the seawater cooling system comprises a water inlet pipeline, a seawater desalination cooling pipeline, a main pipeline and at least one heat exchange cooling pipeline, wherein the water inlet pipeline is respectively communicated with the seawater desalination cooling pipeline and the main pipeline;
the first chloric acid electrolysis module is communicated with the main pipeline, can electrolyze seawater in the main pipeline and discharges the generated hypochlorous acid sodium into a water inlet of the water inlet pipeline;
the second chloric acid electrolysis module is respectively communicated with the water inlet pipeline and the seawater desalination cooling pipeline, can electrolyze fresh water in the water desalination cooling pipeline and discharges the generated sodium hypochlorite into a water inlet of the ethylene/PTA system;
the third chloric acid electrolysis module is communicated with the heat exchange cooling pipeline, can electrolyze seawater in the heat exchange cooling pipeline and discharges the generated sodium hypochlorite into a water inlet of the heat exchanger.
In an embodiment of the present invention, the first chloric acid electrolysis module electrolyzes seawater through a pipe network type electrolytic cell; the second chloric acid electrolysis module electrolyzes brine through a tubular brine electrolysis cell; the third chloric acid electrolysis module electrolyzes seawater through a tube-plate seawater electrolysis bath.
In an embodiment of the present invention, the first chloroic acid electrolysis module includes a first electrolysis pipeline, and a first chloroic acid storage tank and a dosing pump sequentially disposed on the first electrolysis pipeline, a water inlet of the first electrolysis pipeline is communicated with the main pipeline, a water outlet of the first electrolysis pipeline is communicated with a water inlet of the water inlet pipeline, the pipe network type electrolysis tank is disposed on the first electrolysis pipeline, the pipe network type electrolysis tank is disposed near the water inlet of the first electrolysis pipeline, and the dosing pump is disposed near the water outlet of the first electrolysis pipeline.
In the embodiment of the invention, the seawater desalination cooling pipeline is provided with a seawater desalination system which is used for desalinating seawater, the second chloric acid electrolysis module comprises a second electrolysis pipeline, a brine proportioning pipeline, a salt dissolving pool, a brine proportioning system and a second chloric acid storage tank which are arranged on the second electrolysis pipeline in sequence, the water inlet of the second electrolytic pipeline is communicated with the water outlet of the seawater desalination system, the water outlet of the second electrolytic pipeline is communicated with the water inlet of the ethylene/PTA system, one end of the brine proportioning pipeline is communicated with the water outlet of the seawater desalination system, the other end of the brine proportioning pipeline is communicated with the brine proportioning system, the tubular brine electrolytic tank is arranged on the second electrolytic pipeline between the brine proportioning pipeline and the second chloric acid storage tank, and the second chloric acid storage tank is arranged close to a water outlet of the second electrolytic pipeline.
In an embodiment of the invention, a water outlet of the second electrolysis pipeline is connected with a first ejector, and the first ejector is used for spraying sodium hypochlorite into the seawater desalination cooling pipeline at a high speed.
In an embodiment of the present invention, the third chloric acid electrolysis module includes a third electrolysis pipeline and a third chloric acid storage tank disposed on the third electrolysis pipeline, a water inlet of the third electrolysis pipeline is communicated with the main pipeline, a water outlet of the third electrolysis pipeline is communicated with a water inlet of the heat exchanger, the tube-plate seawater electrolysis cell is disposed on the third electrolysis pipeline, the tube-plate seawater electrolysis cell is disposed near the water inlet of the third electrolysis pipeline, and the third chloric acid storage tank is disposed near a water outlet of the third electrolysis pipeline.
In an embodiment of the invention, a water outlet of the third electrolysis pipeline is connected with a second ejector, and the second ejector is used for spraying sodium hypochlorite into the heat exchange cooling pipeline at a high speed.
In an embodiment of the present invention, a seawater booster pump and a filter are sequentially disposed on the water inlet pipeline, the seawater booster pump is disposed near a water inlet of the water inlet pipeline, and the filter is disposed near a water outlet of the water inlet pipeline.
In an embodiment of the present invention, the seawater cooling system further includes at least one return line and at least one water collection tank, the heat exchanger is disposed on the return line, one end of the return line is connected to the power plant and/or the refinery, and the other end of the return line is communicated with the water collection tank.
In an embodiment of the present invention, the power plant includes a thermal power plant and a coal-fired power plant, and the number of the heat exchange cooling line, the return line, and the water collection tank is set corresponding to the number of the power plant and/or the refinery plant.
The seawater cooling system of the integrated refinery plant utilizes the three electrolysis modules to realize sterilization and pollution prevention of all different types of seawater cooling systems of the whole integrated refinery plant; the three electrolysis dies continuously add the chemicals on line, effectively kill the microorganisms in each process section of the seawater cooling system, and the whole system can completely replace the finished product dosing system of the original integrated refinery, thus solving the problems of easy scaling, blockage and the like of finished product dosing.
Drawings
FIG. 1 is a schematic structural view of an integrated refinery seawater cooling system of the present invention.
Detailed Description
Fig. 1 is a schematic structural diagram of an integrated refinery seawater cooling system of the present invention, and as shown in fig. 1, the integrated refinery seawater cooling system includes a seawater cooling system 10, a first chloric acid electrolysis module 20, a second chloric acid electrolysis module 30, and a third chloric acid electrolysis module 40;
the seawater cooling system 10 comprises a water inlet pipeline 11, a seawater desalination cooling pipeline 12, a main pipeline 13 and at least one heat exchange cooling pipeline 14, wherein the water inlet pipeline 11 is respectively communicated with the seawater desalination cooling pipeline 12 and the main pipeline 13, the heat exchange cooling pipeline 14 is communicated with the main pipeline 13, the seawater desalination cooling pipeline 12 is used for cooling the ethylene/PTA system 50, the heat exchange cooling pipeline 14 is used for cooling the power plant 60 and/or the refinery 70, and the heat exchange cooling pipeline 14 is provided with a heat exchanger 141;
the first chloric acid electrolysis module 20 is communicated with the main pipeline 13, the first chloric acid electrolysis module 20 can electrolyze seawater in the main pipeline 13 and discharge the generated sodium hypochlorite into a water inlet of the water inlet pipeline 11;
the second chloric acid electrolysis module 30 is respectively communicated with the water inlet pipeline 11 and the seawater desalination cooling pipeline 12, the second chloric acid electrolysis module 30 can electrolyze fresh water in the seawater desalination cooling pipeline and discharge the generated sodium hypochlorite into a water inlet of the ethylene/PTA system 50;
the third chloric acid electrolysis module 40 is communicated with the heat exchange cooling pipeline 14, and the third chloric acid electrolysis module 40 can electrolyze the seawater in the heat exchange cooling pipeline 14 and discharge the generated sodium hypochlorite into a water inlet of the heat exchanger 141.
The seawater cooling system of the integrated refinery plant utilizes the three electrolysis modules to realize sterilization and antifouling of the seawater cooling systems 10 of all different types of the whole integrated refinery plant; the three electrolysis dies continuously add the chemicals on line, effectively kill the microorganisms in each process section of the seawater cooling system 10, and the whole system can completely replace the finished product dosing system of the original integrated refinery, thus solving the problems of easy scaling, blockage and the like of finished product dosing.
Further, the first chloric acid electrolysis module 20 electrolyzes seawater through a pipe network type electrolytic bath 22; the second chloric acid electrolysis module 30 electrolyzes brine through a tubular brine electrolysis cell 32; the third chloric acid electrolysis module 40 electrolyzes seawater through a tube-plate type seawater electrolysis cell 42. The integrated refinery seawater cooling system provided by the invention adopts three different types of electrolytic tanks, namely the pipe network type electrolytic tank 22, the pipe type brine electrolytic tank 32 and the pipe plate type seawater electrolytic tank 42, to electrolyze to generate sodium hypochlorite, adopts a modular structure design according to the specific characteristics of each electrolytic tank, has high flexibility, is modularly installed nearby as required, and is beneficial to simplifying installation. Moreover, the first chloric acid electrolysis module 20, the second chloric acid electrolysis module 30 and the third chloric acid electrolysis module 40 are effectively combined with the seawater cooling system 10 and distributed in sections at different points, so that the effective disinfection of the whole seawater cooling system 10 is really realized, and the normal operation of a refinery is ensured.
Further, the pipe network type electrolytic cell 22 is composed of a bottom plate, a back plate, a middle plate and a transparent cover plate, wherein the bottom plate, the back plate and the middle plate are made of PVC material, and the transparent cover plate is made of transparent acrylic material. The bottom plate, the back plate, the middle plate and the transparent cover plate form a hexagonal inner cavity, an electrolyte flow channel is formed inside the hexagonal inner cavity, seawater enters from the bottom and flows out from the upper part, and electrolysis is carried out in the electrolyte flow channel; the anode net is titanium-coated noble metal oxide, the cathode is Hastelloy, a plurality of electrolytic tanks are connected in series to form a row, different rows can be connected in parallel to form a group, and the chlorine yield can meet the range of dozens of jin to hundreds of jin.
Further, the tubular brine electrolytic tank 32 and the tube plate type seawater electrolytic tank 42 are composed of a shell, a machine core and an end sealing piece, the pole plates are composite pole plates, namely, the cathode is made of titanium, the anode is made of titanium-coated noble metal oxide, and the chlorine yield of a single electrolytic tank is small.
Furthermore, the electrolyte of the pipe network type electrolytic cell 22 and the pipe plate type seawater electrolytic cell 42 is required to be seawater with chloride ion concentration of more than 10000ppm, and can be fully used in the electrolytic chlorine production project of which the electrolyzed water is seawater, while the electrolyte of the pipe type brine electrolytic cell 32 is dilute brine with concentration of 3% -5%, and can meet the requirement of electrolytic chlorine production without seawater, that is, the arrangement of each electrolytic cell is divided into points and distributed in sections according to the special condition of the seawater cooling system 10, so that thorough disinfection and normal operation of the refinery are ensured.
Furthermore, the concentration of the sodium hypochlorite solution generated in the electrolysis process of the pipe-grid type electrolytic cell 22 and the pipe-plate type seawater electrolytic cell 42 is generally 2000-3000 ppm, and the concentration of the sodium hypochlorite solution generated in the electrolysis process of the pipe-type brine electrolytic cell 32 is generally 8000ppm or so.
Further, for the pipe grid type electrolytic cell 22 and the pipe plate type seawater electrolytic cell 42, the design flow rate of the electrolyte is generally larger to reduce the reduction of the electrolytic efficiency caused by scaling in the electrolytic process, while for the pipe type brine electrolytic cell 32, because the electrolyte is dilute brine, the flow rate of the electrolyte is smaller to reduce the salt consumption of electrolysis, that is, the flow rate of the electrolyte in the pipe grid type electrolytic cell 22 and the pipe plate type seawater electrolytic cell 42 is larger than that of the pipe type brine electrolytic cell 32.
Further, the first chloric acid electrolysis module 20 comprises a first electrolysis pipeline 21, and a first chloric acid storage tank 23 and a dosing pump 24 which are sequentially arranged on the first electrolysis pipeline 21, wherein a water inlet of the first electrolysis pipeline 21 is communicated with the main pipeline 13, a water outlet of the first electrolysis pipeline 21 is communicated with a water inlet of the water inlet pipeline 11, a pipe network type electrolysis bath 22 is arranged on the first electrolysis pipeline 21, the pipe network type electrolysis bath 22 is arranged close to the water inlet of the first electrolysis pipeline 21, and the dosing pump 24 is arranged close to the water outlet of the first electrolysis pipeline 21.
Further, in order to secure Cl in the pipe network type electrolytic cell 22-The concentration is more than 10000ppm, and the water inlet end of the pipe network type electrolytic cell 22 can be provided withA first salt supplementing unit (not shown) is arranged for supplementing salt in the first electrolytic pipeline 21, so that the minimum chlorine yield of the pipe network type electrolytic cell 22 per unit hour can be ensured to exceed 1000 kg.
Further, a seawater desalination system 121 is arranged on the seawater desalination cooling pipeline 12, the seawater desalination system 121 is used for desalinating seawater, the second chloric acid electrolysis module 30 comprises a second electrolysis pipeline 31, a brine proportioning pipeline 33 and a salt dissolving tank 34 which is sequentially arranged on the second electrolysis pipeline 31, the brine proportioning system 35 and the second chloric acid storage tank 36, the water inlet of the second electrolysis pipeline 31 is communicated with the water outlet of the seawater desalination system 121, the water outlet of the second electrolysis pipeline 31 is communicated with the water inlet of the ethylene/PTA inlet system 50, one end of the brine proportioning pipeline 33 is communicated with the water outlet of the seawater desalination system 121, the other end of the brine proportioning pipeline 33 is communicated with the brine proportioning system 35, the tubular brine electrolysis bath 32 is arranged on the second electrolysis pipeline 31 between the brine proportioning pipeline 33 and the second chloric acid storage tank 36, and the second chloric acid storage tank 36 is arranged close to the water outlet of the second electrolysis pipeline 31. In the embodiment, the inlet water of the tubular brine electrolytic cell 32 is 3-5% dilute brine, the concentration of the generated sodium hypochlorite is 6000-8000 ppm, and the chlorine yield per hour is 10 g-100 kg.
Further, the salt dissolving tank 34 is used for collecting the seawater desalinated by the seawater desalination system 121, and adding salt to mix with the desalinated seawater; the brine proportioning system 35 is used for collecting the seawater desalinated by the seawater desalination system 121 and mixing the seawater with the mixed water flowing into the salt dissolving tank 34 in proportion.
Further, a first ejector (water is shown in the figure) is connected to a water outlet of the second electrolysis pipeline 31, and the first ejector is used for spraying sodium hypochlorite into the seawater desalination cooling pipeline 12 at a high speed.
Further, the third chloric acid electrolysis module 40 includes a third electrolysis pipeline 41 and a third chloric acid storage tank 43 disposed on the third electrolysis pipeline 41, a water inlet of the third electrolysis pipeline 41 is communicated with the main pipeline 13, a water outlet of the third electrolysis pipeline 41 is communicated with a water inlet of the heat exchanger 141, the tube-plate type seawater electrolysis bath 42 is disposed on the third electrolysis pipeline 41, the tube-plate type seawater electrolysis bath 42 is disposed near the water inlet of the third electrolysis pipeline 41, and the third chloric acid storage tank 43 is disposed near a water outlet of the third electrolysis pipeline 41.
Further, to ensure Cl in the tube-sheet type seawater electrolytic tank 42-The concentration is more than 10000ppm, a second salt supplementing unit (water is shown in the figure) can be arranged at the water inlet end of the tube plate type seawater electrolytic cell 42 and is used for supplementing salt in the third electrolytic pipeline 41, and the chlorine yield of the tube plate type seawater electrolytic cell 42 in unit hour is ensured to be 10 g-100 kg.
Further, a second ejector (water in the figure) is connected to the water outlet of the third electrolysis pipeline 41, and the second ejector is used for spraying sodium hypochlorite into the heat exchange cooling pipeline 14 at a high speed.
Further, a seawater booster pump 111 and a filter 112 are sequentially arranged on the water inlet pipeline 11, the seawater booster pump 111 is arranged near the water inlet of the water inlet pipeline 11, and the filter 112 is arranged near the water outlet of the water inlet pipeline 11. In this embodiment, the water inlet pipeline 11 is further provided with a plurality of valves 113 for controlling the water inlet flow of the water inlet pipeline 11, and the number of the valves 113 can be freely selected according to actual needs.
Further, the seawater cooling system 10 further comprises at least one return line 15 and at least one water collection tank 16, the heat exchanger 141 is disposed on the return line 15, one end of the return line 15 is connected to the power plant 60 and/or the refinery 70, and the other end of the return line 15 is communicated with the water collection tank 16.
Further, the power plant 60 includes a thermal power plant 61 and a coal-fired power plant 62, and the number of the heat exchange cooling lines 14, the return lines 15, and the water collection tanks 16 is set to correspond to the number of the power plant 60 and/or the refinery 70. In this embodiment, the integrated refinery seawater cooling system includes two thermal power plants 61, two coal-fired power plants 62, and two refineries 70, that is, the integrated refinery seawater cooling system includes six heat exchange cooling pipelines 14, six return pipelines 15, and six water collection tanks 16, but not limited thereto, the heat exchange cooling pipelines 14 are connected in parallel.
The present invention is not limited to the specific details of the above-described embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (10)
1. An integrated refinery seawater cooling system is characterized by comprising a seawater cooling system, a first chloric acid electrolysis module, a second chloric acid electrolysis module and a third chloric acid electrolysis module;
the seawater cooling system comprises a water inlet pipeline, a seawater desalination cooling pipeline, a main pipeline and at least one heat exchange cooling pipeline, wherein the water inlet pipeline is respectively communicated with the seawater desalination cooling pipeline and the main pipeline;
the first chloric acid electrolysis module is communicated with the main pipeline, can electrolyze seawater in the main pipeline and discharges generated sodium hypochlorite into a water inlet of the water inlet pipeline;
the second chloric acid electrolysis module is respectively communicated with the water inlet pipeline and the seawater desalination cooling pipeline, can electrolyze fresh water in the water desalination cooling pipeline and discharges generated sodium hypochlorite into a water inlet of the ethylene/PTA system;
the third chloric acid electrolysis module is communicated with the heat exchange cooling pipeline, can electrolyze seawater in the heat exchange cooling pipeline and discharges generated hypochlorous acid sodium into a water inlet of the heat exchanger.
2. The integrated refinery-related seawater cooling system of claim 1, wherein the first chloric acid electrolysis module electrolyzes seawater via a pipe-grid type electrolyzer; the second chloric acid electrolysis module electrolyzes brine through a tubular brine electrolysis cell; the third chloric acid electrolysis module electrolyzes seawater through a tube-plate seawater electrolysis bath.
3. The integrated refinery seawater cooling system of claim 2, wherein the first chloric acid electrolysis module comprises a first electrolysis pipeline, and a first chloric acid storage tank and a dosing pump which are sequentially arranged on the first electrolysis pipeline, wherein the water inlet of the first electrolysis pipeline is communicated with the main pipeline, the water outlet of the first electrolysis pipeline is communicated with the water inlet of the water inlet pipeline, the pipe network type electrolysis cell is arranged on the first electrolysis pipeline, the pipe network type electrolysis cell is arranged near the water inlet of the first electrolysis pipeline, and the dosing pump is arranged near the water outlet of the first electrolysis pipeline.
4. The integrated refinery seawater cooling system of claim 2, wherein the seawater desalination cooling pipeline is provided with a seawater desalination system for desalinating seawater, the second chloric acid electrolysis module comprises a second electrolysis pipeline, a brine proportioning pipeline, and a salt dissolving pool, a brine proportioning system and a second chloric acid storage tank which are sequentially arranged on the second electrolysis pipeline, a water inlet of the second electrolysis pipeline is communicated with a water outlet of the seawater desalination system, a water outlet of the second electrolysis pipeline is communicated with a water inlet of the ethylene/PTA feeding system, one end of the brine proportioning pipeline is communicated with a water outlet of the seawater desalination system, the other end of the brine proportioning pipeline is communicated with the brine proportioning system, the tubular brine electrolysis tank is arranged on the second electrolysis pipeline between the brine proportioning pipeline and the second chloric acid storage tank, the second chloric acid storage tank is arranged close to the water outlet of the second electrolysis pipeline.
5. The integrated refinery seawater cooling system of claim 4, wherein the water outlet of the second electrolysis pipeline is connected with a first ejector, and the first ejector is used for spraying sodium hypochlorite into the seawater desalination cooling pipeline at a high speed.
6. The integrated refinery seawater cooling system of claim 2, wherein the third chloric acid electrolysis module comprises a third electrolysis pipeline and a third chloric acid storage tank arranged on the third electrolysis pipeline, the water inlet of the third electrolysis pipeline is communicated with the main pipeline, the water outlet of the third electrolysis pipeline is communicated with the water inlet of the heat exchanger, the tube-plate type seawater electrolysis cell is arranged on the third electrolysis pipeline, the tube-plate type seawater electrolysis cell is arranged close to the water inlet of the third electrolysis pipeline, and the third chloric acid storage tank is arranged close to the water outlet of the third electrolysis pipeline.
7. The integrated refinery seawater cooling system of claim 6, wherein the water outlet of the third electrolysis pipeline is connected with a second ejector for high-speed spraying of sodium hypochlorite into the heat exchange cooling pipeline.
8. The integrated refinery seawater cooling system of claim 1, wherein the water inlet pipeline is sequentially provided with a seawater booster pump and a filter, the seawater booster pump is disposed near the water inlet of the water inlet pipeline, and the filter is disposed near the water outlet of the water inlet pipeline.
9. The integrated refinery seawater cooling system of claim 1, further comprising at least one return line and at least one water collection tank, wherein the heat exchanger is disposed on the return line, one end of the return line is connected to the power plant and/or the refinery, and the other end of the return line is communicated with the water collection tank.
10. The integrated refinery seawater cooling system of claim 9, wherein the power plant comprises a thermal power plant and a coal-fired power plant, and the number of the heat exchange cooling line, the return line, and the water collection tank is set corresponding to the number of the power plant and/or the refinery plant.
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