CN104130797B - A kind of ethane cracking furnace convection section module remodeling method and convection section module thereof - Google Patents
A kind of ethane cracking furnace convection section module remodeling method and convection section module thereof Download PDFInfo
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- CN104130797B CN104130797B CN201310157905.5A CN201310157905A CN104130797B CN 104130797 B CN104130797 B CN 104130797B CN 201310157905 A CN201310157905 A CN 201310157905A CN 104130797 B CN104130797 B CN 104130797B
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Abstract
The present invention is a kind of ethane cracking furnace convection section module remodeling method and convection section module thereof, the method is by reusing the first bolster stake, by prefabricated for each parts in convection zone be the convection section module of integral type, and to be arranged on the first bolster stake, to be completed convection section moduleization transformation; This convection section module comprises heat-exchanging tube bundle, tube sheet, smoke baffle plate, modularization steel construction and lining; Tube sheet is arranged on convection section module end, and smoke baffle plate is arranged on inside tube sheet, and tube sheet and smoke baffle plate are arranged along the length direction interval of convection section module; Modularization steel construction is fixedly connected with the first bolster stake; Present invention achieves and the interval layer of convection section in cracking furnace is transformed, and do not need to change the first bolster stake, the equipment such as roof panel, blower fan, drum that can ensure do not need displacement, have features such as improving workmanship, shortening construction period, reduction difficulty of construction, minimizing installation cost.
Description
Technical field
The present invention relates to field of petrochemical industrial, be specifically related to a kind of ethane cracking furnace convection section module remodeling method and convection section module thereof.
Background technology
Pyrolyzer is one of nucleus equipment of ethylene unit, and convection zone is one of core component in pyrolyzer, and its Main Function reclaims heat in high-temperature flue gas with preheating material and steam, and then reduce funnel temperature, improves the thermo-efficiency of pyrolyzer.Earlier designs the pyrolyzer built are due to the limitation of technology, and after long-time running, all technical is backwardness relatively.For reaching objects such as improving throughput, energy-saving and emission-reduction, raising feed flexibility, must transform the convection zone of pyrolyzer.Existing remodeling method is as follows:
1, loose mail installation method
I.e. in-site installation steel construction, tube sheet, lining loose mail, then penetrates tube sheet perforate in certain sequence by the heat-exchanging tube bundle being prefabricated into J type, then carries out the installation method of site welding.This kind of method, without the need to transforming structural column, has stronger handiness.But because heat-exchanging tube bundle number is many, spacing is little, this method site welding and inspection workload is large, operating space is little and mostly be working aloft, restive duration and construction quality.
2, integral installation method is restrained
Namely first by place to the heat-exchanging tube bundle and tube sheet in-site installation that are prefabricated into tube bank, the constructional method of steel construction, lining loose mail (or first install steel construction and lining, then hang in tube bank) is then installed.This kind of method is without the need to transforming structural column, little compared with loose mail installation method construction volume, but lining and steel construction still need in-site installation.
3, the module whole installation method with the first bolster stake
By the first bolster stake as a module steel construction part, by method that is integral prefabricated to lining, tube bank, tube sheet, header box etc. and lifting.This kind of method construction is simple, and module quality is easy to control.But bear the weight of the main equipments such as roof panel, blower fan, drum due to the first bolster stake, this method is only applicable in Overall Reconstruction scheme the project that bolster stake is changed.
Chinese patent CN202359075U provides a kind of convection section in cracking furnace steel construction, it is characterized in that: convection zone main body, top steel construction and afterbody smoke box flue are installed in supported on both sides steel construction is assembled into and integrally install.This patent is a kind of modular method for arranging, does not relate to and carry out modularization transformation on existing basis;
Domestic periodical " Petroleum Engineering Construction " the 30th volume the 6th phase describes one section of document, exercise question is " grand celebration 100,000 t/a ethane cracking furnace convection section module is formed a team and lifts ", the document mainly describes newly-built convection section in cracking furnace module field assembly and hanging method, with the present invention without correlationship.
Domestic periodical " chemical science and technology " the 17th volume the 3rd phase describes one section of document, and exercise question is " modular design of convection section in cracking furnace ", and the document mainly describes newly-built pyrolyzer modular design feature, with the present invention without correlationship.
Summary of the invention
All need to install at the construction field (site) the longer and problem that installation quality is not good of the installation period caused to solve the transformation of existing convection zone, the invention provides a kind of ethane cracking furnace convection section module remodeling method and convection section module thereof, while realizing modularization transformation, can ensure that again former pyrolyzer monocoque structure does not change.
The technical solution used in the present invention is as follows:
A kind of ethane cracking furnace convection section module remodeling method.
Described method is by reusing the first bolster stake 6, by prefabricated according to design requirements for all parts in ethane cracking furnace convection zone be the convection section module of integral type, and described convection section module is carried out scene with described first bolster stake 6 be fixedly connected with, complete the convection section moduleization transformation of described ethane cracking furnace.
The concrete steps of described method are,
Step 1, moves a segment distance L by the tube sheet 2 in described convection zone outside header box side, the length of heat-exchanging tube bundle 1 is extended L to described header box side simultaneously; The described left and right two ends of tube sheet 2 are fixed on the second bolster stake 8 of modularization steel construction;
Step 2, arranges smoke baffle plate 3 in the situ of described tube sheet 2, and described smoke baffle plate 3 is provided with the perforate consistent with tube sheet 2, and described heat-exchanging tube bundle 1 is through the perforate on described smoke baffle plate 3; The described left and right two ends of smoke baffle plate 3 are fixed on described modularization steel construction;
Step 3, adopts sealing element 4 to be filled in the gap between the perforate of described smoke baffle plate 3 and heat-exchanging tube bundle 1 real;
Step 4, described heat-exchanging tube bundle 1, tube sheet 2, smoke baffle plate 3, modularization steel construction and lining are prefabricated into described convection section module, described convection section module is arranged on described first bolster stake 6, and by described modularization steel construction by the dynamic changes process of described heat-exchanging tube bundle 1, tube sheet 2, smoke baffle plate 3 and lining extremely described first bolster stake 6.
In described step 1, the outset of described tube sheet 2 is greater than 300mm from L, and the prolongation distance L of described heat-exchanging tube bundle 1 is greater than 300mm;
In described step 4, after described convection section module installation in position, described smoke baffle plate 3 one end is positioned at inside described first bolster stake 6, and is fixed on described modularization steel construction.
According to the convection section module that a kind of ethane cracking furnace convection section module remodeling method manufactures, described convection section module comprises described heat-exchanging tube bundle 1, tube sheet 2, smoke baffle plate 3, modularization steel construction and lining;
Described heat-exchanging tube bundle 1 two ends are connected with header box respectively, form heat exchange runner;
Described tube sheet 2 is arranged on described convection section module end, and described smoke baffle plate 3 is arranged on inside described tube sheet 2, and described tube sheet 2 and smoke baffle plate 3 are arranged along the length direction interval of described convection section module;
Described smoke baffle plate 3 is provided with the perforate consistent with tube sheet 2, and described heat-exchanging tube bundle 1 is successively through the perforate on described tube sheet 2 and smoke baffle plate 3;
Gap place between the perforate of described smoke baffle plate 3 and described heat-exchanging tube bundle 1 is provided with described sealing element 4;
Described tube sheet 2 and smoke baffle plate 3 two ends are separately fixed on described modularization steel construction, and described modularization steel construction is fixedly connected with described first bolster stake 6.
The upper/lower terminal of described first bolster stake 6 is respectively arranged with web plate 5, and described web plate 5 is arranged in the horizontal direction, and web plate 5 carries out joint connection in site after described convection section module installation in position.
Described modularization steel construction comprises steel plate 7, second bolster stake 8, channel-section steel 9 and furnace wall plate 10;
Described steel plate 7 is vertically arranged, after convection section module installation in position, described steel plate 7 is arranged between described smoke baffle plate 3 and described first bolster stake 6, and carries out joint connection in site with described first bolster stake 6 and fix; The described left and right two ends of steel plate 7 are connected with described furnace wall plate 10 respectively.
Described second bolster stake 8 is arranged on the described left and right two ends of tube sheet 2;
The quantity of described channel-section steel 9 is a pair, and channel-section steel 9 notch described in a pair is arranged on the upper and lower critical surface place of described convection section module in opposite directions; Link closely inside described channel-section steel 9 described furnace wall plate 10, and after described convection section module installation in position, described channel-section steel 9 carries out scene by described web plate 5 with described first bolster stake 6 and is fixedly connected with.
Described furnace wall plate 10 is arranged on its both sides along the length direction of described convection section module, and described first bolster stake 6 is fixedly installed on outside described furnace wall plate 10.
In described convection section module, the described modularization steel construction being positioned at described first bolster stake 6 opposite side comprises the second bolster stake 8, H profile steel 11, channel-section steel 9 and furnace wall plate 10;
The quantity of described second bolster stake 8 is a pair, and it is separately positioned on the described left and right two ends of tube sheet 2, and described H profile steel 11 is symmetricly set on the described left and right two ends of smoke baffle plate 3 with described first bolster stake 6;
The quantity of described channel-section steel 9 is a pair, and channel-section steel 9 notch described in a pair is in opposite directions to the upper and lower critical surface place being arranged on described convection section module; Link closely inside described channel-section steel 9 described furnace wall plate 10, and the upper critical surface of described channel-section steel 9 is arranged on described second bolster stake 8 top, lower critical face is arranged on described second bolster stake 8 bottom.
Described tube sheet 2 is greater than 300mm with the spacing of smoke baffle plate 3.
The thickness of described steel plate 7 is greater than 10mm.
Described first bolster stake 6 and the second bolster stake 8 are support shaped steel, and the shape of described first bolster stake 6 is H type, and the shape of described second bolster stake 8 is T-shaped.
Described sealing element 4 is the fine blanket of pottery.
The present invention is ensureing under the prerequisite that pyrolyzer first bolster stake 6 reuses, and in the mode of the supply of material of convection section module entirety, complete installation, carries out local flow improvement to convection section in cracking furnace.Convection section module is the one-piece construction be assembled into by tube sheet 2, smoke baffle plate 3, heat-exchanging tube bundle 1, modularization steel construction, lining, header box.
Convection zone before transformation, there is tube sheet in the position of the first bolster stake 6, the weight of heat-exchanging tube bundle 1 born by this tube sheet, and power is passed to the first bolster stake 6.
When carrying out modularization transformation, tube sheet cannot be continued be arranged on this position, because the first bolster stake 6 herein reuses, the integral module manufactured only can arrange a block plate 7 herein, for ensureing module size, and being installed on original position, can mating with other upper and lower modules that reuse, steel plate 7 cannot bear the weight of a whole set of heat-exchanging tube bundle 1, cannot transport and lift.
Therefore, tube sheet 2 position of convection zone end of the present invention is moved outside header box side, the tube sheet 2 after moving outward, is arranged on the second bolster stake 8, by the second bolster stake 8 and channel-section steel 9, power is passed to the first bolster stake 6.
Move tube sheet outward and make heat-exchanging tube bundle 1 extension, heat interchanging area increases, for ensureing to meet processing requirement, at former tubesheet location place, smoke baffle plate 3 is set, fine blanket plug is made pottery in fact in gap between smoke baffle plate 3 perforate and heat-exchanging tube bundle 1, makes the heat-exchanging tube bundle 1 place smokeless flowing of extension, does not participate in heat exchange; The weight of heat-exchanging tube bundle 1 is still born by tube sheet, and smoke baffle plate 3 does not carry, and only plays the effect cutting off flue gas circulation.
When mounted, the steel construction of convection zone of the present invention is connected by steel plate 7, web plate 5 and the first bolster stake 6 of reusing, and carries out site welding after lifting.
Compared with existing convection zone, the present invention has the following advantages:
1, convection zone of the present invention is the integral module structure be made up of parts such as steel construction, lining, tube sheet, heat-exchanging tube bundles, its first manufactory is prefabricated complete after, be transported to in-site installation again, decrease the workload of site welding and inspection, there is raising workmanship, reduce site operation difficulty, shorten the advantages such as construction period.
2, convection zone of the present invention does not need to change the first bolster stake, can ensure that roof panel, blower fan, drum etc. do not need displacement, reduce construction cost, shorten construction period.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of pyrolyzer convection zone of the present invention;
Fig. 2 is the A-A direction view of Fig. 1;
Description of reference numerals:
1-heat-exchanging tube bundle; 2-tube sheet; 3-smoke baffle plate; 4-seal cartridge; 5-web plate;
6-first bolster stake; 7-steel plate; 8-second bolster stake; 9-channel-section steel; 10-furnace wall plate;
11-H shaped steel;
Below in conjunction with embodiment, further illustrate the present invention.
Embodiment
As shown in Figure 1 and Figure 2, figure merely illustrates a part for convection section module structure, and its upper and lower also has other module that reuses; Further, be illustrated as simplified painting, each heat-exchanging tube bundle 1 is not connected in the drawings, and in fact, connected by elbow between each heat-exchanging tube bundle 1, namely material flows in coil pipe.
A kind of ethane cracking furnace convection section module remodeling method, described method is by reusing the first bolster stake 6, by prefabricated according to design requirements for all parts in ethane cracking furnace convection zone be the convection section module of integral type, and described convection section module is carried out scene with described first bolster stake 6 be fixedly connected with, complete the convection section moduleization transformation of described ethane cracking furnace.
The concrete steps of described method are:
Step 1, moves 330mm by the tube sheet 2 in described convection zone outside header box side, the length of heat-exchanging tube bundle 1 is extended 330mm to described header box side simultaneously; The described left and right two ends of tube sheet 2 are fixed on the second bolster stake 8 of modularization steel construction;
Step 2, arranges smoke baffle plate 3 in the situ of described tube sheet 2, and described smoke baffle plate 3 is provided with the perforate consistent with tube sheet 2, and described heat-exchanging tube bundle 1 is through the perforate on described smoke baffle plate 3; The described left and right two ends of smoke baffle plate 3 are fixed on described modularization steel construction;
Step 3, adopts the fine blanket of pottery to be filled in the gap between the perforate of described smoke baffle plate 3 and heat-exchanging tube bundle 1 real;
Step 4, described heat-exchanging tube bundle 1, tube sheet 2, smoke baffle plate 3, modularization steel construction and lining are prefabricated into described convection section module, described convection section module is fixedly connected with described first bolster stake 6, and by described modularization steel construction by the dynamic changes process of described heat-exchanging tube bundle 1, tube sheet 2, smoke baffle plate 3 and lining extremely described first bolster stake 6.
According to the convection section module that a kind of ethane cracking furnace convection section module remodeling method manufactures, described convection section module comprises described heat-exchanging tube bundle 1, tube sheet 2, smoke baffle plate 3, modularization steel construction and lining;
Described heat-exchanging tube bundle 1 two ends are connected with header box respectively, form heat pipe runner;
Described tube sheet 2 is arranged on described convection section module end, and described smoke baffle plate 3 is arranged on inside described tube sheet 2, and described tube sheet 2 and smoke baffle plate 3 are arranged along the length direction interval of described convection section module;
Described tube sheet 2 is 330mm with the spacing of smoke baffle plate 3.
Described smoke baffle plate 3 is provided with perforate, and the position of opening of described smoke baffle plate 3 is consistent with described tube sheet 2, and described heat-exchanging tube bundle 1 is successively through the perforate on described tube sheet 2 and smoke baffle plate 3;
Gap place between the perforate of described smoke baffle plate 3 and described heat-exchanging tube bundle 1 is provided with the fine blanket of described pottery;
Described tube sheet 2 and smoke baffle plate 3 two ends are separately fixed on described modularization steel construction, and are fixedly connected with described first bolster stake 6.
The upper/lower terminal of described first bolster stake 6 is respectively arranged with web plate 5, and described web plate 5 is arranged in the horizontal direction, and web plate 5 carries out joint connection in site after described convection section module installation in position.
Described modularization steel construction comprises steel plate 7, second bolster stake 8, channel-section steel 9 and furnace wall plate 10;
Described steel plate 7 is vertically arranged, after convection section module installation in position, described steel plate 7 is arranged between described smoke baffle plate 3 and described first bolster stake 6, and carries out joint connection in site with described first bolster stake 6 and fix; The described left and right two ends of steel plate 7 are connected with described furnace wall plate 10 respectively.
The thickness of described steel plate 7 is 10mm.
Described second bolster stake 8 is arranged on the described left and right two ends of tube sheet 2;
The quantity of described channel-section steel 9 is a pair, and channel-section steel 9 notch described in a pair is arranged on the upper and lower critical surface place of described convection section module in opposite directions; Link closely inside described channel-section steel 9 described furnace wall plate 10, and after described convection section module installation in position, described channel-section steel 9 carries out scene by described web plate 5 with described first bolster stake 6 and is fixedly connected with.
Described furnace wall plate 10 is arranged on its both sides along the length direction of described convection section module, and described first bolster stake 6 is fixedly installed on outside described furnace wall plate 10.
In described convection section module, the described modularization steel construction being positioned at described first bolster stake 6 opposite side comprises the second bolster stake 8, H profile steel 11, channel-section steel 9 and furnace wall plate 10;
The quantity of described second bolster stake 8 is a pair, and it is separately positioned on the described left and right two ends of tube sheet 2, and described H profile steel 11 is symmetricly set on the described left and right two ends of smoke baffle plate 3 with described first bolster stake 6;
The quantity of described channel-section steel 9 is a pair, and channel-section steel 9 notch described in a pair is in opposite directions to the upper and lower critical surface place being arranged on described convection section module; Link closely inside described channel-section steel 9 described furnace wall plate 10, and the upper critical surface of described channel-section steel 9 is arranged on described second bolster stake 8 top, lower critical face is arranged on described second bolster stake 8 bottom.
Described first bolster stake 6 and the second bolster stake 8 are support shaped steel, and the shape of described first bolster stake 6 is H type, and the shape of described second bolster stake 8 is T-shaped.
Technique scheme is one embodiment of the present invention, for those skilled in the art, on the basis that the invention discloses application method and principle, be easy to make various types of improvement or distortion, and the structure be not limited only to described by the above-mentioned embodiment of the present invention, therefore previously described mode just preferably, and do not have restrictive meaning.
Claims (9)
1. an ethane cracking furnace convection section module remodeling method, is characterized in that:
Described method is by reusing the first bolster stake (6), by prefabricated for all parts in ethane cracking furnace convection zone be the convection section module of integral type, and described convection section module is fixedly connected with described first bolster stake (6), complete the convection section moduleization transformation of described ethane cracking furnace;
The concrete steps of described method are,
Step 1, moves a segment distance L by the tube sheet (2) in convection zone outside header box side, the length of heat-exchanging tube bundle (1) is extended L to described header box side simultaneously; Described tube sheet (2) left and right two ends are fixed on modularization steel construction;
Step 2, in the situ of described tube sheet (2), smoke baffle plate (3) is set, described smoke baffle plate (3) is provided with the perforate consistent with tube sheet (2), and described heat-exchanging tube bundle (1) is through the perforate on described smoke baffle plate (3); Described smoke baffle plate (3) left and right two ends are fixed on described modularization steel construction;
Step 3, adopts sealing element (4) to be filled in the gap between (3) perforate of described smoke baffle plate and heat-exchanging tube bundle (1) real;
Step 4, described heat-exchanging tube bundle (1), tube sheet (2), smoke baffle plate (3), modularization steel construction and lining are prefabricated into described convection section module, described convection section module is arranged on described first bolster stake (6), and by described modularization steel construction by the dynamic changes process of described heat-exchanging tube bundle (1), tube sheet (2), smoke baffle plate (3) and lining extremely described first bolster stake (6).
2. a kind of ethane cracking furnace convection section module remodeling method according to claim 1, is characterized in that:
In described step 1, the outset of described tube sheet (2) is greater than 300mm from L, and the prolongation distance L of described heat-exchanging tube bundle (1) is greater than 300mm;
In described step 4, described smoke baffle plate (3) one end is arranged on described first bolster stake (6) inner side.
3. the convection section module of a kind of ethane cracking furnace convection section module remodeling method manufacture according to claim 1 and 2; It is characterized in that:
Described convection section module comprises described heat-exchanging tube bundle (1), tube sheet (2), smoke baffle plate (3), modularization steel construction and lining;
Described tube sheet (2) is arranged on described convection section module end, described smoke baffle plate (3) is arranged on described tube sheet (2) inner side, and described tube sheet (2) and smoke baffle plate (3) are arranged along the length direction interval of described convection section module;
Described smoke baffle plate (3) is provided with the perforate consistent with described tube sheet (2), and described heat-exchanging tube bundle (1) is successively through the perforate on described tube sheet (2) and smoke baffle plate (3);
Gap place between (3) perforate of described smoke baffle plate and described heat-exchanging tube bundle (1) is provided with described sealing element (4);
Described tube sheet (2) and smoke baffle plate (3) two ends are separately fixed on described modularization steel construction, and described modularization steel construction is fixedly connected with described first bolster stake (6).
4. convection section module according to claim 3, is characterized in that:
The upper/lower terminal of described first bolster stake (6) is respectively arranged with web plate (5), and described web plate (5) is arranged in the horizontal direction;
Described modularization steel construction comprises steel plate (7), the second bolster stake (8), channel-section steel (9) and furnace wall plate (10);
Described steel plate (7) is vertically arranged, and is arranged between described smoke baffle plate (3) and described first bolster stake (6); Described steel plate (7) left and right two ends are connected with described furnace wall plate (10) respectively;
Described second bolster stake (8) is arranged on described tube sheet (2) left and right two ends;
The quantity of described channel-section steel (9) is a pair, and channel-section steel described in a pair (9) notch is arranged on the upper and lower critical surface place of described convection section module in opposite directions; Link closely described furnace wall plate (10) in described channel-section steel (9) inner side, described channel-section steel (9) is fixedly connected with described first bolster stake (6) by described web plate (5).
5. convection section module according to claim 3, is characterized in that:
In described convection section module, the described modularization steel construction being positioned at described first bolster stake (6) opposite side comprises the second bolster stake (8), H profile steel (11), channel-section steel (9) and furnace wall plate (10);
The quantity of described second bolster stake (8) is a pair, it is separately positioned on described tube sheet (2) left and right two ends, and described H profile steel (11) and described first bolster stake (6) are symmetricly set on described smoke baffle plate (3) left and right two ends;
The quantity of described channel-section steel (9) is a pair, and channel-section steel described in a pair (9) notch is in opposite directions to the upper and lower critical surface place being arranged on described convection section module; Link closely described furnace wall plate (10) in described channel-section steel (9) inner side, the upper critical surface of described channel-section steel (9) is arranged on described second bolster stake (8) top, lower critical face is arranged on described second bolster stake (8) bottom.
6. convection section module according to claim 3, is characterized in that:
Described tube sheet (2) is greater than 300mm with the spacing of smoke baffle plate (3).
7. convection section module according to claim 4, is characterized in that:
The thickness of described steel plate (7) is greater than 10mm.
8. the convection section module according to claim 4 or 5, is characterized in that:
Described first bolster stake (6) and the second bolster stake (8) are support shaped steel, and the shape of described first bolster stake (6) is H type, and the shape of described second bolster stake (8) is T-shaped.
9. convection section module according to claim 3, is characterized in that:
Described sealing element (4) is the fine blanket of pottery.
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| CN104690524B (en) * | 2015-02-15 | 2017-09-26 | 四川蓝星机械有限公司 | A kind of processing technology of heat-exchanger rig for heat exchanger |
| CN107192275A (en) * | 2017-07-04 | 2017-09-22 | 江苏东方成套设备制造集团有限公司 | A kind of convection current modular structure and assemble method |
| CN112552950A (en) * | 2020-10-23 | 2021-03-26 | 中国石油化工股份有限公司 | Frame type convection section module in convection section of ethylene cracking furnace |
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| CN102041031A (en) * | 2010-12-17 | 2011-05-04 | 惠生工程（中国）有限公司 | Hearth-passing column structure used for ethylene cracking furnace and manufacturing method thereof |
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