CN105018130A - Delayed coking heating furnace - Google Patents
Delayed coking heating furnace Download PDFInfo
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- CN105018130A CN105018130A CN201510432475.2A CN201510432475A CN105018130A CN 105018130 A CN105018130 A CN 105018130A CN 201510432475 A CN201510432475 A CN 201510432475A CN 105018130 A CN105018130 A CN 105018130A
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Abstract
The present invention discloses a delayed coking heating furnace for heating heavy oil to delayed coking temperature, the delayed coking heating furnace comprises at least one heaters, the heater is internally equipped with a radiant heating zone and a convection heating zone located above the radiant heating zone; a radiant heating zone heavy oil inlet is arranged near the furnace bottom, and a radiant heating zone heavy oil outlet is located on the upper part of the radiant heating zone. The radiant heating zone heavy oil inlet of the delayed coking heating furnace is arranged near the furnace bottom, and the radiant heating zone heavy oil outlet is located on the upper part of the radiant heating zone, so that the heavy oil flows in from the lower portion of the radiant heating zone and flows out from the upper portion of the radiant heating zone, the arrangement of wires of the delayed coking heating furnace and a subsequently connected coke tower is easy, and the oil transfer line bearing status can be improved.
Description
Technical field
The present invention relates to petrochemical heating furnace technical field, particularly relate to a kind of delay coking heating furnace.
Background technology
Delayed coking is that one utilizes heavy oil not easily to occur the characteristic of coking precursors thing (coking parent) when heat conversion is lower, in coking heater pipe, obtain the energy required for heavy oil lighting, in coke drum, complete the technological process of coking reaction.Controlling Software coking rate is the basis of guaranteeing Management of Long-term Operation of Delayed Coking Unit; Raising coking furnace coking reaction gives hot quality to heat and coking reaction as far as possible, guarantee coking reaction (heat absorption) institute heat requirement, the coke yield and the dry gas yied that reduce device improve petrol and diesel oil yield, are the key problem in technology that this technological process obtains economic benefit.
Coking process technical characterstic causes necessary Focus Control tube coking simultaneously and improves coke drum coking reaction to heat and to hot quality, to reach device long-term operation and the object improving device light oil yield simultaneously, but minimizing tube coking is conflicting with reducing coke yield target: reducing device coke yield should by increasing the coking reaction of medium in process furnace to heat, ensure that medium reacts thoroughly in coke drum, thus reach the object reducing coke yield and increase liquid receipts.But increase coking reaction and should take into account coking rate in pipe to while heat, reduce the peak temperature (Peak Temperature) of oil film, to avoid serious coking in pipe.
All provided by process furnace because reacting institute's heat requirement in heavy oil coke drum, by increasing the reaction of medium in process furnace to heat, namely increase the heat supply that medium reacts in coke drum, be equivalent to increase reaction depth in medium coke drum, thus reduce coke yield.
Current delay coking stove technology generally adopts single lying pipe double-side radiation comb, significantly improves average radiation hot strength, saves steel alloy tubing.Simultaneously radiating furnace tube is two-sided is heated, and reduces most high-heat strength, shortens oil product intraductal retention time, effectively slow down tube coking.Reduce furnace height, and adopt the little energy efficient of multiple stage low NOx Flat flame burner, make boiler tube be heated evenly further.Adopt multiple spot steam injection technology, improve velocity in pipes, delay tube coking.Adopt online coke cleaning and burn new technology, realizing removing coking in pipe when not stopping work, extending the production cycle of process furnace.
But there is following problem in coking furnace at present:
1, in order to slow down coking, adopt single lying pipe double-side radiation comb, oil product is too short at residing time in furnace, and general more than 426 DEG C control within 45 seconds, have even lower than 30 seconds.Such oil product cracking reaction depth in stove is inadequate, cause coke yield low value-added in the resultant of reaction in coke drum to increase, and the liquid of high added value receives productive rate reduction.
2, adopt upper entering and lower leaving flow process, namely oil product first enters radiation chamber top under the heating of the convection chamber on stove top is backward, is finally come out of the stove by radiation chamber bottom, enters coke drum through transfer line.Radiating furnace tube supports and adopts upper hanging structure, radiation chamber outlet boiler tube thermal walking large (generally downward ~ 100mm).Outlet of still is to the transfer line temperature high (500 DEG C) of coke drum simultaneously, and stress state is complicated, easily causes furnace outlet and transfer line flange connections to leak.
3, the trend after furnace outlet connects transfer line is vertically upward first, then level connection joint coke drum.Lower part outlet adds transfer line vertical length.
Given this, overcome above defect of the prior art, provide a kind of new delay coking heating furnace type of furnace to become this area technical problem urgently to be resolved hurrily.
Summary of the invention
In view of Problems existing in background technology, the object of the present invention is to provide a kind of delay coking heating furnace, on the basis of guaranteeing Management of Long-term Operation of Delayed Coking Unit, raising coking furnace coking reaction gives hot quality to heat and coking reaction, reduce coke yield and the dry gas yied of device, improve petrol and diesel oil yield.
Delay coking heating furnace of the present invention, which solves process furnace and the follow-up coke drum be connected and to connect up stressed technical problem that is complicated and transfer line.
The present invention adopts following technical scheme:
A kind of delay coking heating furnace, for by heavy-oil heating to delayed coking temperature, compared with prior art its difference is, it comprises at least one well heater, is provided with radiation heating district and is positioned at the convective heating district above radiation heating district in described well heater;
Be provided with a middle wall with flues in described radiation heating district, this differentiation be divided into the first radiation heating district and the second radiation heating district; The bottom in described first radiation heating district and the second radiation heating district all has furnace bottom combustor section, and described furnace bottom combustor section comprises and to be multiplely positioned near furnace bottom and against furnace wall/the burner for lighting a fire in described the first/the second radiation heating district that arranges of middle wall with flues; Horizontal direction radiating furnace tube is laid with in first, second radiation heating district described;
Be laid with horizontal direction vapour pipe, convection coil in described convective heating district from top to bottom successively and cover convection coil;
Wherein, radiation heating district heavy oil entrance is arranged near furnace bottom, and heavy oil outlet in radiation heating district is positioned at radiation heating district upper area.
Preferably, described radiating furnace tube step-by-step arrangement in vertical direction, it comprises the single boiler tube being positioned at top and the double boiler tube being positioned at below.
Preferably, the top of described middle wall with flues has baffling structure.
Preferably, the inwall that described radiation heating district is positioned at bottom is provided with sidewall wall with flues, and the top of described sidewall wall with flues has baffling structure.
Preferably, described delay coking heating furnace comprises symmetrically arranged two well heaters, and the chimney be communicated with the convective heating district of two well heaters.
Preferably, described delay coking heating furnace comprises the multiple well heaters being centrosymmetric and arranging, and the chimney be communicated with the convective heating district of multiple well heater.
Preferably, described vapour pipe is finned tube.
Preferably, covering convection coil described in is light pipe.
Preferably, described radiating furnace tube is located in first, second radiation heating district described by furnace tube hanger.
Preferably, the main body of described furnace tube hanger comprises the epimere support body, stage casing support body and the hypomere support body that set gradually vertically downward;
Epimere support body and stage casing support body are all configured at least two-layer, all have two risers and multiple the first support portion run through two risers and arrange that be arranged in parallel in Vertical dimension compartment of terrain; The top of described epimere support body is provided with the fixed part cooperatively interacted with coking heater back timber; What described first support portion was detachable is located at described riser; Described first support portion has a matching part lacking structure in circle contacted with boiler tube;
Hypomere support body is configured at least two-layer, has two risers and multiple the second support portion for the double boiler tube in fixing process furnace radiation heating district be located between two risers that be arranged in parallel in Vertical dimension compartment of terrain; Described second support portion and described riser are fixedly installed.
Compared with prior art, delay coking heating furnace radiation heating district of the present invention heavy oil entrance is arranged near furnace bottom, the heavy oil outlet of radiation heating district is positioned at radiation heating district upper area, heavy oil enters top and flows out from the bottom of radiation zone, the stressing conditions of the transfer line that connects up easily with the follow-up coke drum be connected, improves simultaneously.
Compared with prior art, delay coking heating furnace of the present invention, by increasing part double-row double surface radiation comb at radiation section, extends oil product 426 DEG C of intraductal retention times, improves the scission reaction degree of depth, reaches liquid in coke drum and receives the object improved.The structures such as by bottom in and top out flow process, burner is put by wall paper, flame tilts to furnace wall, reflection furnace wall concavo-convex baffling brick, offset because extending the easy coking tendency that the residence time causes.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment according to coking heater of the present invention;
Fig. 2 is the structural representation according to well heater in coking heater of the present invention;
Fig. 3 is according to boiler tube comb vertical planning drawing in coking heater of the present invention;
Fig. 4 is the direction view of B-B shown in Fig. 3;
Fig. 5 is the structural representation according to furnace tube hanger in coking heater of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Delay coking heating furnace radiation heating district of the present invention heavy oil entrance is arranged near furnace bottom, the heavy oil outlet of radiation heating district is positioned at radiation heating district upper area, heavy oil enters top and flows out from the bottom of radiation zone, the stressing conditions of the transfer line that connects up easily with the follow-up coke drum be connected, improves simultaneously.By increasing part double-row double surface radiation comb at radiation section, extend oil product 426 DEG C of intraductal retention times, improve the scission reaction degree of depth, reach liquid in coke drum and receive the object improved.The structures such as by bottom in and top out flow process, burner is put by wall paper, flame tilts to furnace wall, reflection furnace wall concavo-convex baffling brick, offset because extending the easy coking tendency that the residence time causes.
Refer to Fig. 1, illustrate the structural representation of the delay coking heating furnace 100 of a preferred embodiment of the present invention.The delay coking heating furnace 100 that this specification sheets institute accompanying drawings is painted and internal structure thereof, ratio, size etc., content all only in order to coordinate specification sheets to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the modification of any structure, the change of proportionlity or size, the adjustment of quantity, do not affecting under effect that delay coking heating furnace 100 of the present invention can produce and the object that can reach, all should still drop in scope that disclosed technology contents covers.Simultaneously, quote in this specification sheets as " on ", D score, "left", "right", " centre " and " one " etc. term, only clear for the ease of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.Delay coking heating furnace 100 comprises well heater 10 and chimney 20.
Refer to Fig. 2, illustrate the structural representation of well heater 10 in the process furnace 100 of a preferred embodiment of the present invention, well heater 10 comprises radiation heating district 11 and convective heating district 12.Wherein, radiation heating district 11 is positioned at the below of well heater 10, and convective heating district 12 is positioned at the top of well heater 10.In the preferred embodiment illustrated in fig. 1, delay coking heating furnace 100 comprises symmetrically arranged two well heaters 10, and the chimney 20 be communicated with the convective heating district 12 of two well heaters 10.
Shown in Fig. 2, radiation heating district 11 can comprise outer wall 111 and inwall 112, and base plate 113(also can be described as furnace bottom 113), the inwall 112 that radiation heating district 11 is positioned at bottom is provided with sidewall wall with flues 114, be provided with a middle wall with flues 13 in radiation heating district 11, this district 11 be divided into the first radiation heating district 11a and the second radiation heating district 11b; The bottom of described first radiation heating district 11a and the second radiation heating district 11b is provided with burner 14, burner 14 to be positioned near furnace bottom 113 and to arrange against sidewall wall with flues 114 or middle wall with flues 113, burner 14 for lighting a fire in described first, second radiation heating district 11a, 11b, horizontal direction radiating furnace tube 15 is laid with in first, second radiation heating district 11a, 11b, the heavy oil entrance 16 in radiation heating district 11 is arranged near furnace bottom 113, and the heavy oil outlet 17 in radiation heating district 11 is positioned at radiation heating district 11 upper area.Arranged near furnace wall by burner, flame tilts to furnace wall, by heating furnace wall, forms uniform plane of reflection, boiler tube is heated evenly, simultaneously flame is from boiler tube lengthening distance, reduces hot strength peak value, slows down tube coking.
Be laid with horizontal direction vapour pipe 121, convection coil 122 in convective heating district 12 from top to bottom successively and cover convection coil 123.Until the heavy oil of coking to enter from convective region entrance 12a be preheated convective heating district 12 after enter transport pipe 30 from convective region outlet 12b, be transported to the heavy oil entrance 16 in radiation heating district 11 subsequently, thus enter in radiation heating district 11.
In one preferred embodiment, radiating furnace tube 15 step-by-step arrangement in vertical direction, it comprises the single boiler tube being positioned at top and the double boiler tube being positioned at below.Above-mentioned radiating furnace tube 15 is located in described first, second radiation heating district 11a, 11b by furnace tube hanger 18.The laying bottom of radiating furnace tube 15 adopts the mode of double-row double surface radiation stringing, and top adopts single double-side radiation stringing, extends the residence time in oil pipe, scission reaction depth down while oil product is absorbed heat, thus improves liquid yield in coke drum.Radiating furnace tube 15 adopts Combined type hanging structure, and dismounting is flexible.The main body of furnace tube hanger 18 comprises the epimere support body 181, stage casing support body 182 and the hypomere support body 183 that set gradually vertically downward; Epimere support body 181 and stage casing support body 182 are all configured at least two-layer, all have two the riser 18a and multiple the first support portion 18b running through two risers and arrange that be arranged in parallel in Vertical dimension compartment of terrain; The top of described epimere support body 181 is provided with the fixed part 18c cooperatively interacted with coking heater 100 back timber; What described first support portion 18b was detachable is located at described riser 18a; Described first support portion 18b has a matching part (not shown) lacking structure in circle contacted with boiler tube 15; Hypomere support body 183 is configured at least two-layer, has two the riser 18a and multiple the second support portion 18d for the double boiler tube in fixing process furnace 100 radiation heating district 11 be located between two riser 18a that be arranged in parallel in Vertical dimension compartment of terrain; Described second support portion 18d and described riser 18a is fixedly installed.
The top of middle wall with flues 13 has baffling structure 13a, the top of sidewall wall with flues 114 has baffling structure 114a, middle wall with flues 14 and sidewall wall with flues 114 arrange concavo-convex baffling brick as reflection furnace wall, and high-temperature flue gas disturbance in strengthening radiation heating district 11, improves transmission of heat by convection ratio.Vapour pipe 121 is finned tube.Cover convection coil 123 for light pipe.
The quantity of well heater 10 also can be multiple, and as in a preferred embodiment, delay coking heating furnace 100 comprises the multiple well heaters 10 being centrosymmetric and arranging, and the chimney 20 be communicated with the convective heating district 12 of multiple well heater 10.
Compared with prior art, the radiation heating district 11 heavy oil entrance 16 of delay coking heating furnace 100 of the present invention is arranged near furnace bottom, radiation heating district 11 heavy oil outlet 16 is positioned at radiation heating district 11 upper area, heavy oil enters top and flows out from the bottom of radiation zone, the stressing conditions of the transfer line that connects up easily with the follow-up coke drum be connected, improves simultaneously.
The delay coking heating furnace of the present embodiment, described radiation heating district setting unit double-row double surface radiation stringing, extends the residence time of oil product in pipe, reaches the object of deep pyrolytic, improves liquid yield in coke drum.Arranged near furnace wall by burner, flame tilts to furnace wall, and by heating furnace wall, form uniform plane of reflection, boiler tube is heated evenly, flame is from boiler tube lengthening distance simultaneously, reduces hot strength peak value, slows down tube coking; Reflection furnace wall arranges concavo-convex baffling brick, and high-temperature flue gas disturbance in strengthening radiation chamber, improves transmission of heat by convection ratio; Radiating furnace tube adopts Combined type hanging structure, and dismounting is flexible.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a delay coking heating furnace, for by heavy-oil heating to delayed coking temperature, it is characterized in that, comprise at least one well heater, be provided with radiation heating district in described well heater and be positioned at convective heating district above radiation heating district;
Be provided with a middle wall with flues in described radiation heating district, this differentiation be divided into the first radiation heating district and the second radiation heating district; The bottom in described first radiation heating district and the second radiation heating district all has furnace bottom combustor section, and described furnace bottom combustor section comprises and to be multiplely positioned near furnace bottom and against furnace wall/the burner for lighting a fire in described the first/the second radiation heating district that arranges of middle wall with flues; Horizontal direction radiating furnace tube is laid with in first, second radiation heating district described;
Be laid with horizontal direction vapour pipe, convection coil in described convective heating district from top to bottom successively and cover convection coil;
Wherein, radiation heating district heavy oil entrance is arranged near furnace bottom, and heavy oil outlet in radiation heating district is positioned at radiation heating district upper area.
2. delay coking heating furnace according to claim 1, is characterized in that, described radiating furnace tube step-by-step arrangement in vertical direction, and it comprises the single boiler tube being positioned at top and the double boiler tube being positioned at below.
3. delay coking heating furnace according to claim 1, is characterized in that, the top of described middle wall with flues has baffling structure.
4. delay coking heating furnace according to claim 1, is characterized in that, the inwall that described radiation heating district is positioned at bottom is provided with sidewall wall with flues, and the top of described sidewall wall with flues has baffling structure.
5. delay coking heating furnace according to claim 1, is characterized in that, described burner is arranged near furnace wall, and flame tilts to furnace wall.
6. delay coking heating furnace according to claim 1, is characterized in that, described delay coking heating furnace comprises symmetrically arranged two well heaters, and the chimney be communicated with the convective heating district of two well heaters.
7. delay coking heating furnace according to claim 1, is characterized in that, described delay coking heating furnace comprises the multiple well heaters being centrosymmetric and arranging, and the chimney be communicated with the convective heating district of multiple well heater.
8. delay coking heating furnace according to claim 1, is characterized in that, described vapour pipe is finned tube, described in cover convection coil be light pipe.
9. delay coking heating furnace according to claim 2, is characterized in that, described radiating furnace tube is located in first, second radiation heating district described by furnace tube hanger.
10. delay coking heating furnace according to claim 9, is characterized in that, the main body of described furnace tube hanger comprises the epimere support body, stage casing support body and the hypomere support body that set gradually vertically downward;
Epimere support body and stage casing support body are all configured at least two-layer, all have two risers and multiple the first support portion run through two risers and arrange that be arranged in parallel in Vertical dimension compartment of terrain; The top of described epimere support body is provided with the fixed part cooperatively interacted with coking heater back timber; What described first support portion was detachable is located at described riser; Described first support portion has a matching part lacking structure in circle contacted with boiler tube;
Hypomere support body is configured at least two-layer, has two risers and multiple the second support portion for the double boiler tube in fixing process furnace radiation heating district be located between two risers that be arranged in parallel in Vertical dimension compartment of terrain; Described second support portion and described riser are fixedly installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510432475.2A CN105018130B (en) | 2015-07-22 | 2015-07-22 | A kind of delay coking heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510432475.2A CN105018130B (en) | 2015-07-22 | 2015-07-22 | A kind of delay coking heating furnace |
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| Publication Number | Publication Date |
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| CN105018130A true CN105018130A (en) | 2015-11-04 |
| CN105018130B CN105018130B (en) | 2017-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510432475.2A Active CN105018130B (en) | 2015-07-22 | 2015-07-22 | A kind of delay coking heating furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU204866U1 (en) * | 2021-01-15 | 2021-06-16 | Общество с ограниченной ответственностью "Алитер-Акси" (ООО "Алитер-Акси") | SLOW COOKING OVEN |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264798B1 (en) * | 1999-07-20 | 2001-07-24 | Petro-Chem Development Co. Inc. | Delayed coker charge heater and process |
| CN203382716U (en) * | 2013-05-15 | 2014-01-08 | 中石化洛阳工程有限公司 | Delayed coking device |
| CN205011706U (en) * | 2015-07-22 | 2016-02-03 | 武汉炼化工程设计有限责任公司 | Delayed coking furnace |
-
2015
- 2015-07-22 CN CN201510432475.2A patent/CN105018130B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264798B1 (en) * | 1999-07-20 | 2001-07-24 | Petro-Chem Development Co. Inc. | Delayed coker charge heater and process |
| CN203382716U (en) * | 2013-05-15 | 2014-01-08 | 中石化洛阳工程有限公司 | Delayed coking device |
| CN205011706U (en) * | 2015-07-22 | 2016-02-03 | 武汉炼化工程设计有限责任公司 | Delayed coking furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU204866U1 (en) * | 2021-01-15 | 2021-06-16 | Общество с ограниченной ответственностью "Алитер-Акси" (ООО "Алитер-Акси") | SLOW COOKING OVEN |
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| CN105018130B (en) | 2017-03-01 |
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