CN116836729A - Delayed coking device blow-down cooling system and blow-down cooling method - Google Patents
Delayed coking device blow-down cooling system and blow-down cooling method Download PDFInfo
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- CN116836729A CN116836729A CN202210285242.4A CN202210285242A CN116836729A CN 116836729 A CN116836729 A CN 116836729A CN 202210285242 A CN202210285242 A CN 202210285242A CN 116836729 A CN116836729 A CN 116836729A
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- 238000001816 cooling Methods 0.000 title claims abstract description 62
- 230000003111 delayed effect Effects 0.000 title claims abstract description 25
- 238000004939 coking Methods 0.000 title claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 94
- 239000000295 fuel oil Substances 0.000 claims abstract description 40
- 239000000571 coke Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000006260 foam Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 20
- 238000005406 washing Methods 0.000 claims description 12
- 239000007791 liquid phase Substances 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 9
- 238000005201 scrubbing Methods 0.000 claims description 8
- 230000002441 reversible effect Effects 0.000 claims description 6
- 238000005194 fractionation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005504 petroleum refining Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 230000001174 ascending effect Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005235 decoking Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G70/00—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00
- C10G70/04—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00 by physical processes
- C10G70/06—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00 by physical processes by gas-liquid contact
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
- C10G5/04—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas with liquid absorbents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
- C10G5/06—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas by cooling or compressing
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G70/00—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00
- C10G70/04—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00 by physical processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/002—Cooling of cracked gases
Abstract
The application belongs to the technical field of petroleum refining, and particularly relates to a delayed coking device emptying cooling system and an emptying cooling method. The input end of the Venturi scrubber of the emptying cooling system is connected with the coke tower, high-temperature oil gas of the coke tower is output through the output end of the Venturi scrubber, a first-stage scrubber, a baffle, a second-stage scrubber and a foam remover are sequentially arranged in the emptying tower from bottom to top, a first input port of the emptying tower is arranged below the first-stage scrubber, the first input port of the emptying tower is communicated with the output end of the Venturi scrubber so as to convey the high-temperature oil gas to the emptying tower, the first-stage scrubber can output light oil products, the second-stage scrubber can output heavy oil products, and the air cooler, the water cooler and the oil-gas separator are sequentially connected with a first output port of the emptying tower. The application can reduce and improve the phenomena of tube bundle scaling and wax hanging of the subsequent air cooler so as to improve the cooling effect of the air cooler at the top of the air vent tower, and has good practical value.
Description
Technical Field
The application belongs to the technical field of petroleum refining, and particularly relates to a delayed coking device emptying cooling system and an emptying cooling method.
Background
The delayed coking unit is a deep thermal cracking process for converting heavy oil into dry gas, liquefied gas, coker gasoline, coker diesel, coker wax oil and coke, and the raw material is typically vacuum residuum conveyed upstream. The delayed coking process is the main poor heavy oil processing means in oil refinery and is one continuous production and intermittent operation process, and includes at least two coke drums, with one coke drum being in on-line coking and the other coke drum being in the relevant operation of decoking, and the two coke drums being alternately in coking and decoking operation. The coke tower for removing the coke is required to be subjected to the steps of small steam blowing, large steam blowing, water cooling, coke soaking, water draining, top bottom cover opening, hydraulic coke cutting, steam pressure testing, oil gas preheating, feeding switching and the like.
The emptying cooling system is mainly used for treating high-temperature steam and oil gas generated in the process of blowing and feeding water of a coke tower, adopts a closed tower internal cooling technology, namely, the emptying gas generated in the process of blowing and feeding water of the coke tower Leng Jiao is hermetically fed into the emptying cooling tower and is separated into non-condensable gas, sulfur-containing sewage and dirty oil through cooling and separation treatment, wherein the non-condensable gas is discharged to a torch, the sulfur-containing sewage is discharged to a cold coke cutting water system, and the dirty oil is discharged to a dirty oil tank of a whole factory. In the actual operation process, because the gas velocity in the emptying tower is higher, a large amount of heavy oil carrying coke powder is carried to the top system of the emptying tower, so that the tube bundle of the air cooler of the top system of the emptying tower is scaled and wax is hung, and the cooling effect of the air cooler at the top of the emptying tower is affected.
Disclosure of Invention
In order to solve the technical problems, the application provides a delayed coking device emptying cooling system and an emptying cooling method, which aim to improve the cooling effect of an overhead air cooler at least to a certain extent.
The technical scheme of the application is as follows:
in one aspect, the application provides a delayed coker blowdown cooling system characterized in that the blowdown cooling system comprises:
the venturi scrubber is provided with an input end and an output end, wherein the input end of the venturi scrubber is connected with the coke tower, and high-temperature oil gas of the coke tower is output through the output end of the venturi scrubber;
the emptying tower is provided with a first input port and a first output port, a first-stage scrubber, a baffle, a second-stage scrubber and a foam remover are sequentially arranged in the emptying tower from bottom to top, the first input port of the emptying tower is arranged below the first-stage scrubber, the first input port of the emptying tower is communicated with the output end of the Venturi scrubber so as to convey high-temperature oil gas to the emptying tower, the first-stage scrubber can output light oil products, the second-stage scrubber can output heavy oil products, after the high-temperature oil gas conveyed into the emptying tower is separated, the light oil products output by the first-stage scrubber are subjected to first-stage scrubbing, the scrubbed oil gas reversely contacts with liquid phase of the baffle, then is subjected to second-stage scrubbing of heavy oil products output by the second-stage scrubber, and after the scrubbed oil gas is subjected to foam removal of liquid carried in the oil gas, and is discharged through the first output port;
the first air cooler, the water cooler and the oil-gas separator are sequentially connected with a first output port of the emptying tower, and oil gas discharged from the first output port is cooled by the first air cooler and the water cooler and then enters the oil-gas separator to carry out gas-liquid separation.
In some embodiments, the blowdown cooling system further comprises:
the output end of the second pump body for conveying heavy oil products is connected with the Venturi scrubber so as to convey the heavy oil products to the Venturi scrubber, so that high-temperature oil gas of the Venturi scrubber is washed.
In some embodiments, a second output port is provided at the bottom of the purge column, the second output port of the purge column being connected to the input of the first pump body.
In some embodiments, a filter is disposed between the second output port of the vent tower and the input end of the first pump body.
In some embodiments, the vent tower is further provided with a second input port, the second input port of the vent tower being disposed between the second output port and the first input port, the second input port of the vent tower being connected to the output of the first pump body.
In some embodiments, a heater is disposed between the second input port of the vent tower and the output end of the first pump body.
In some embodiments, the output end of the first pump body is further connected with the secondary scrubber, and a second air cooler is arranged between the output end of the first pump body and the secondary scrubber.
In some embodiments, the second air cooler is provided with a third outlet and a fourth outlet, the third outlet of the second air cooler being connected to the secondary scrubber, the fourth outlet of the second air cooler being for connection to the fractionation column.
In some embodiments, the blowdown cooling system further comprises a second pump body, an input end of the second pump body is connected with the oil-gas separator, and an output end of the second pump body is connected with the primary scrubber.
Based on the above-mentioned emptying cooling system, the application also provides a delayed coking device emptying cooling method, which is characterized in that the emptying cooling method comprises the following steps:
high-temperature oil gas of the coke tower enters the emptying tower through the Venturi scrubber;
the high-temperature oil gas is sequentially subjected to primary washing of light oil products output by the primary washer, liquid phase reverse contact of the baffle plate and secondary washing of heavy oil products output by the secondary washer in the emptying tower, and is discharged through the first output port after liquid carried in the oil gas is removed by the foam remover;
and the oil gas discharged from the first output port is cooled by the first air cooler and the water cooler and then enters an oil-gas separator to be subjected to gas-liquid separation.
The beneficial effects of the application at least comprise:
according to the emptying cooling system and the emptying cooling method of the delayed coking device, a first-stage scrubber, a baffle plate, a second-stage scrubber and a foam remover are sequentially arranged in the emptying tower from bottom to top, high-temperature oil gas is sequentially subjected to first-stage scrubbing of light oil products output by the first-stage scrubber, reverse contact of liquid phases of the baffle plate and second-stage scrubbing of heavy oil products output by the second-stage scrubber in the emptying tower, liquid carried in the oil gas is removed by the foam remover, and then gas-liquid separation is carried out after the liquid is discharged through a first output port. Because the high-temperature oil gas is subjected to two-stage washing and baffle buffering in the emptying tower, the gas speed in the emptying tower can be reduced, and the heavy oil carrying coke powder is carried out of the emptying tower, so that the phenomena of tube bundle scaling and wax hanging of the subsequent air cooler can be reduced and improved, the cooling effect of the air cooler at the top of the emptying tower is improved, and the device has good practical value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
In the accompanying drawings:
FIG. 1 is a schematic layout of a delayed coker blowdown cooling system in accordance with an embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for blowdown cooling according to an embodiment of the present application.
Reference numerals:
the device comprises a Venturi scrubber-1, an emptying tower-2, a primary scrubber-3, a baffle-4, a secondary scrubber-5, a first air cooler-6, a water cooler-7, a first pump body-8, a heater 9, a foam remover-10, a second pump body 11, an oil-gas separator 12, a filter-13 and a second air cooler 14.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. 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.
It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.
The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
The application is described below with reference to specific embodiments in conjunction with the accompanying drawings:
the embodiment of the application provides a delayed coking device emptying cooling system and an emptying cooling method, aiming at improving the cooling effect of an overhead air cooler at least to a certain extent.
FIG. 1 is a schematic layout of a delayed coker blowdown cooling system in accordance with an embodiment of the present application. Referring to fig. 1, the blow cooling system according to the embodiment of the present application includes a venturi scrubber 1, a blow tower 2, a first air cooler 6, a water cooler 7, and an oil-gas separator 12.
The venturi scrubber 1 of the embodiment of the application is provided with an input end and an output end, wherein the input end of the venturi scrubber 1 is connected with the coke tower, and high-temperature oil gas of the coke tower is output through the output end of the venturi scrubber 1. When the coke tower is in the large steam supply stage and the small water supply stage, high-temperature oil gas is discharged from the coke tower, enters the venturi scrubber through the input end of the venturi scrubber 1 and is discharged from the output end of the venturi scrubber, so that the flow rate of the high-temperature oil gas is accelerated.
The emptying tower 2 is provided with a first input port and a first output port, a first-stage scrubber 3, a baffle 4, a second-stage scrubber 5 and a foam remover 10 are sequentially arranged in the emptying tower 2 from bottom to top, the first input port of the emptying tower 2 is arranged below the first-stage scrubber 3, the first input port of the emptying tower 2 is communicated with the output end of the Venturi scrubber 1 so as to convey high-temperature oil gas to the emptying tower 2, the first-stage scrubber 3 can output light oil products, the second-stage scrubber 5 can output heavy oil products, after the high-temperature oil gas conveyed into the emptying tower 2 is separated, the light oil products output by the first-stage scrubber 3 are subjected to first-stage scrubbing, the scrubbed oil gas is reversely contacted with liquid phase of the baffle 4 and then subjected to second-stage scrubbing of the heavy oil products output by the second-stage scrubber 5, and the scrubbed oil gas is discharged through the first output port after liquid carried in the oil gas is removed by the foam remover 10.
In the embodiment of the application, the high-temperature oil gas discharged from the output end of the Venturi scrubber 1 preferably flows into the vent tower 2 in a tangential direction of the vent tower 2, so that the high-temperature oil gas can impact the inner wall of the vent tower 2, the inner wall of the vent tower 2 can be washed, and the conditions of scaling and the like of the inner wall of the vent tower 2 are improved.
In the embodiment of the application, the primary scrubber 3 and the secondary scrubber 5 both comprise a main pipeline and a plurality of nozzles arranged at the bottom of the main pipeline, and light oil conveyed by the main pipeline of the primary scrubber 3 is sprayed and blown from the plurality of nozzles to scrub ascending oil gas, and the ascending speed of high-temperature oil gas can be reduced to reduce that heavy oil carrying coke powder is carried out of an emptying tower; the heavy oil product conveyed by the main pipeline of the secondary scrubber 5 is also sprayed and blown from a plurality of nozzles to scrub ascending oil gas, and the ascending speed of high-temperature oil gas can be reduced, so that the heavy oil carrying coke powder is reduced to be carried out of the emptying tower.
In the embodiment of the application, the baffle 4 is in non-sealing arrangement, and can comprise a plurality of herringbone baffles which are arranged in multiple layers at intervals, and high-temperature oil gas washed by light oil products discharged from the primary washer 3 is reversely contacted with liquid phase of the herringbone baffles 4 and is discharged from gaps among the herringbone baffles and then rises. The multiple herringbone baffles not only can buffer the rising speed of high-temperature oil gas, but also can adsorb coke powder impurities in the high-temperature oil gas, and can further avoid the phenomena of tube bundle scaling and wax hanging of the subsequent air cooler so as to improve the cooling effect of the air cooler at the top of the emptying tower.
In the embodiment of the application, the reason why the high-temperature oil gas is washed by the light oil discharged by the first-stage washer 3, buffered by the baffle 4 and finally washed by the heavy oil discharged by the second-stage washer 5 is as follows: the light oil product has good property and strong capability of capturing coke powder, and when the light oil product is contacted with high-temperature oil gas through the primary scrubber 3, the high-temperature oil gas can be sufficiently scrubbed, so that the coke powder is washed down to the greatest extent, and the coking of the baffle 4 is reduced; the gas is buffered and redistributed through a baffle 4, and is fully contacted with the liquid phase on the tower plate and washed, and the heavy components are fully washed for the second time; and finally, washing the middle-heavy components in the oil gas by using a heavy oil product, and ensuring that the middle-heavy components and coke powder in the oil gas reaching the top of the tower are sufficiently washed.
The demister in the embodiment of the application is used for separating liquid of the washed high-temperature oil gas and discharging gas of the high-temperature oil gas to the greatest extent.
The first air cooler 6, the water cooler 7 and the oil-gas separator 12 in the embodiment of the application are sequentially connected with the first output port of the emptying tower 2, and oil gas discharged from the first output port is cooled by the first air cooler 6 and the water cooler 7 and then enters the oil-gas separator 12 for gas-liquid separation, thus completing the emptying and cooling process of high-temperature oil gas.
Further, referring to fig. 1, in the embodiment of the present application, the blow-down cooling system further includes a first pump body 8, the first pump body 8 is used for conveying heavy oil products, the output end of the second pump body 8 is connected with the venturi scrubber 1, the output end of the second pump body 8 conveys heavy oil products to the venturi scrubber 1, the enthalpy value of the heavy oil products is large, the gas phase quantity of the heavy oil products with the same mass can be condensed is large, and the effect of reducing the gas quantity entering the blow-down tower is achieved, so as to wash the high temperature oil gas of the venturi scrubber 1, i.e. the high temperature oil gas entering the blow-down tower 2 contains heavy oil products.
In the embodiment of the application, with reference to fig. 1, the bottom of the emptying tower 2 is provided with the second output port, and the second output port of the emptying tower 2 is connected with the input end of the first pump body 8, namely, heavy oil product conveyed by the first pump body 8 is sourced from the emptying tower 2, so that the number of equipment can be reduced, and the field arrangement is optimized. Of course, the heavy oil product conveyed by the first pump body 8 may be other oil sources, which is not limited herein.
Referring to fig. 1, a filter 13 is disposed between the second output port of the blow-down tower 2 and the input end of the first pump body 8 to filter heavy oil discharged from the blow-down tower 2.
Further, referring to fig. 1, the emptying tower 2 of the embodiment of the present application is further provided with a second input port, where the second input port of the emptying tower 2 is disposed between the second output port and the first input port, and the second input port of the emptying tower 2 is connected to the output end of the first pump body 8, that is, the output of the first pump body 8 is used to convey heavy oil products required by the work to the emptying tower 2.
Further, referring to fig. 1, a heater 9 is disposed between the second input port of the emptying tower 2 and the output end of the first pump body 8, the output end of the first pump body 8 is further connected with the second scrubber 5, a second first air cooler 14 is disposed between the output end of the first pump body 8 and the second scrubber 5, in addition, the first air cooler 14 is provided with a third output port and a fourth output port, the third output port of the first air cooler 14 is connected with the second scrubber 5, and the fourth output port of the first air cooler 14 is used for being connected with the fractionating tower. Namely, after being filtered by a filter 13 at the bottom of the emptying tower 2 and pressurized by a first pump body 8, a part of heavy oil containing coke powder enters the bottom of the emptying tower after being heated by a heater 9, a part of heavy oil is cooled by a first air cooler 14, one part of heavy oil serving as washing oil of a secondary washer 5 returns into the emptying tower, and the other part of heavy oil enters the bottom of the fractionating tower for recycling.
Further, referring to fig. 1, the blowdown cooling system according to the embodiment of the present application further includes a second pump body 11, an input end of the second pump body 11 is connected to the oil-gas separator 12, and an output end of the second pump body 11 is connected to the first-stage scrubber 3. The light oil separated by the oil-gas separator 12 can be conveyed to the first-stage scrubber 3 through the second pump body 11 to serve as the detergent of the first-stage scrubber 3, and of course, the number of used equipment can be reduced, and the site arrangement is optimized. Of course, the heavy oil product conveyed by the first pump body 8 may be other oil sources, which is not limited herein. Of course, the light oil conveyed by the second pump body 11 may be other oil sources, which is not limited herein.
Based on the emptying cooling system, the embodiment of the application also provides a delayed coking device emptying cooling method. Fig. 2 is a schematic flow chart of a method for cooling by venting according to an embodiment of the present application, and in combination with fig. 2, the method for cooling by venting includes:
high-temperature oil gas of the coke tower enters the emptying tower 2 through the Venturi scrubber 1;
the high-temperature oil gas is sequentially subjected to primary washing of light oil products output by a primary washer 3, liquid phase reverse contact of a baffle 4 and secondary washing of heavy oil products output by a secondary washer 5 in a blow-down tower 2, liquid carried in the oil gas is removed by a foam remover 10, and then the oil gas is discharged through a first output port;
the oil gas discharged from the first output port is cooled by the first air cooler 6 and the water cooler 7, and then enters the oil-gas separator 12 for gas-liquid separation.
In summary, according to the emptying cooling system and the emptying cooling method for the delayed coking device provided by the embodiment of the application, through the first-stage scrubber, the baffle, the second-stage scrubber and the demister which are sequentially arranged in the emptying tower from bottom to top, high-temperature oil gas is sequentially subjected to first-stage washing of light oil products output by the first-stage scrubber, reverse contact of liquid phases of the baffle and second-stage washing of heavy oil products output by the second-stage scrubber in the emptying tower, liquid carried in the oil gas is removed by the demister, and then gas-liquid separation is performed after the liquid is discharged through the first output port. Because the high-temperature oil gas is subjected to two-stage washing and baffle buffering in the emptying tower, the gas speed in the emptying tower can be reduced, and the heavy oil carrying coke powder is carried out of the emptying tower, so that the phenomena of tube bundle scaling and wax hanging of the subsequent air cooler can be reduced and improved, the cooling effect of the air cooler at the top of the emptying tower is improved, and the device has good practical value.
It should be noted that, the equipment designed by the embodiment of the application is the prior art, and the equipment can reduce and improve the phenomena of tube bundle scaling and wax hanging of the subsequent air cooler by re-planning arrangement, so as to improve the cooling effect of the air cooler at the top of the air cooler, and has good practicability.
In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 device or element 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, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
In the description of the present application, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A delayed coker blow-down cooling system, the blow-down cooling system comprising:
the venturi scrubber (1) is provided with an input end and an output end, wherein the input end of the venturi scrubber (1) is connected with the coke tower, and high-temperature oil gas of the coke tower is output through the output end of the venturi scrubber (1);
the emptying tower (2) is provided with a first input port and a first output port, a first-stage scrubber (3), a baffle (4), a second-stage scrubber (5) and a foam remover (10) are sequentially arranged in the emptying tower (2) from bottom to top, the first input port of the emptying tower (2) is arranged below the first-stage scrubber (3), the first input port of the emptying tower (2) is communicated with the output end of the Venturi scrubber (1) so as to convey high-temperature oil gas to the emptying tower (2), the first-stage scrubber (3) can output light oil products, the second-stage scrubber (5) can output heavy oil products, after the high-temperature oil gas conveyed into the emptying tower (2) is separated, the light oil products output by the first-stage scrubber (3) are subjected to first-stage scrubbing, and after the scrubbed oil gas contacts with a reverse liquid phase of the baffle (4), the heavy oil products output by the second-stage scrubber (5) are subjected to second-stage scrubbing, and the liquid is removed by the foam remover (10), and the liquid is discharged;
the device comprises a first air cooler (6), a water cooler (7) and an oil-gas separator (12), wherein the first air cooler, the water cooler (7) and the oil-gas separator (12) are sequentially connected with a first output port of the emptying tower (2), and oil gas discharged from the first output port is cooled by the first air cooler (6) and the water cooler (7) and then enters the oil-gas separator (12) to be subjected to gas-liquid separation.
2. The delayed coker blowdown cooling system of claim 1, wherein said blowdown cooling system further comprises:
the first pump body (8) is used for conveying heavy oil products, the output end of the second pump body (8) is connected with the venturi scrubber (1) so as to convey the heavy oil products to the venturi scrubber (1) and wash high-temperature oil gas of the venturi scrubber (1).
3. The delayed coking plant blow-down cooling system according to claim 2, wherein the bottom of the blow-down tower (2) is provided with a second output port, which second output port of the blow-down tower (2) is connected to the input of the first pump body (8).
4. A delayed coker blowdown cooling system according to claim 3, characterized in that a filter (13) is provided between the second outlet of the blowdown tower (2) and the input of the first pump body (8).
5. A delayed coker blow cooling system as claimed in claim 3, wherein said blow column (2) is further provided with a second inlet, said second inlet of said blow column (2) being arranged between said second outlet and said first inlet, said second inlet of said blow column (2) being connected to the output of said first pump (8).
6. A delayed coker blowdown cooling system according to claim 5, characterized in that a heater (9) is provided between the second input port of the blowdown tower (2) and the output of the first pump body (8).
7. The delayed coking device emptying cooling system according to claim 6, characterized in that the output end of the first pump body (8) is also connected with the secondary scrubber (5), and a second air cooler (11) is arranged between the output end of the first pump body (8) and the secondary scrubber (5).
8. The delayed coking plant blow-down cooling system according to claim 7, wherein the second air cooler (11) is provided with a third outlet and a fourth outlet, the third outlet of the second air cooler (11) being connected to the secondary scrubber (5), the fourth outlet of the second air cooler (11) being for connection to the fractionation column.
9. The delayed coking unit blow-down cooling system according to any one of claims 1 to 8, further comprising a second pump body (11), wherein an input of the second pump body (11) is connected to the gas-oil separator (12), and an output of the second pump body (11) is connected to the primary scrubber (3).
10. A delayed coking unit blow-down cooling method based on a blow-down cooling system according to any one of claims 1 to 9, characterized in that said blow-down cooling method comprises:
high-temperature oil gas of the coke tower enters the emptying tower (2) through the Venturi scrubber (1);
the high-temperature oil gas is sequentially subjected to primary washing of light oil products output by the primary washer (3), liquid phase reverse contact of the baffle plate (4) and secondary washing of heavy oil products output by the secondary washer (5) in the emptying tower (2), and liquid carried in the oil gas is removed by the demister (10) and then discharged through the first output port;
the oil gas discharged from the first output port is cooled by the first air cooler (6) and the water cooler (7) and then enters the oil-gas separator (12) for gas-liquid separation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210285242.4A CN116836729A (en) | 2022-03-23 | 2022-03-23 | Delayed coking device blow-down cooling system and blow-down cooling method |
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| CN202210285242.4A CN116836729A (en) | 2022-03-23 | 2022-03-23 | Delayed coking device blow-down cooling system and blow-down cooling method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662420A (en) * | 2020-12-01 | 2021-04-16 | 浙江石油化工有限公司 | Novel empty tower for delayed coking device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662420A (en) * | 2020-12-01 | 2021-04-16 | 浙江石油化工有限公司 | Novel empty tower for delayed coking device |
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