CN102247783A - Shell-and-tube synthesizing tower - Google Patents
Shell-and-tube synthesizing tower Download PDFInfo
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- CN102247783A CN102247783A CN2011101849021A CN201110184902A CN102247783A CN 102247783 A CN102247783 A CN 102247783A CN 2011101849021 A CN2011101849021 A CN 2011101849021A CN 201110184902 A CN201110184902 A CN 201110184902A CN 102247783 A CN102247783 A CN 102247783A
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- perforated plate
- shell
- housing
- air inlet
- inlet pipe
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Abstract
The invention relates to a shell-and-tube synthesizing tower which comprises a shell, an inner sphere sealing head, an upper tube plate, a lower tube plate, reaction pipes and an air inlet pipe, wherein the inner sphere sealing head is accommodated in an outer sphere sealing head at the upper end of the shell; the shell above the lower tube plate is provided with a water inlet and a water outlet; and two ends of each reaction pipe are communicated with the upper inner sphere sealing head and the lower outer sphere sealing head respectively. The synthesizing tower has a rational structure and long service life; and the problem of structural damage caused by thermal expansion and cold shrinkage in the prior art is effectively solved.
Description
Technical field
The invention belongs to catalytic reactor field in the chemical process, be specifically related to a kind of be used for methyl alcohol synthetic/Fischer-Tropsch is synthetic/the shell-and-tube synthetic tower of carbon monodixe conversion/ethylene glycol synthetic reaction.
Background technology
Synthetic tower is modal a kind of reaction pressure vessel in coal, oil and the chemical industry, especially uses more extensive in industrial process such as synthetic ammonia and methyl alcohol and carbon monodixe conversion.The structural shape kind of synthetic tower is a lot, by the heat exchange formal classification, can be divided into three types of cold shock formula, inner-cooled and external-cooling types.Its primary structure form of existing external-cooling type synthetic tower is: comprise housing, upper perforated plate, lower perforated plate, reaction tube, upper perforated plate is fixedlyed connected with housing respectively with lower perforated plate, and form a confined space thus, the two ends of reaction tube then be welded on respectively on upper perforated plate and the lower perforated plate and with the shell space on upper perforated plate top, the shell space conducting of lower perforated plate bottom.Reacting gas enters in the pipe, carries out synthetic reaction under catalyst action.Synthetic reaction generally is the process of a heat release, and its building-up process is all carried out under high temperature, hyperbaric environment; And in above-mentioned environment, reaction tube can produce because of being heated and expand, reaction tube is different with case temperature, the material difference, be subjected to thermogenetic swell increment difference, thereby cause the Welding Structure between reaction tube and upper perforated plate and the lower perforated plate surrender to occur, perhaps can cause the Welding Structure between upper perforated plate, lower perforated plate and the casing cylinder to occur becoming flexible, occur the gap at last and cause whole synthetic tower cisco unity malfunction.The coefficient of expansion that reduces reaction tube at present becomes the important research direction of above-mentioned defective for a change, reaction tube in the similar synthetic tower of external import now all adopts double metallic composite material to make, its thermal coefficient of expansion is below 3.0, so the service life of the synthetic tower of import is generally about 10 years, but synthetic tower is generally all more than hundred tons, consumptive material is huge, so the price of import equipment is very expensive, substantially all more than 40,000,000; The existing domestic synthetic tower production that also has a lot of with spline structure, but be generally 1-3 service life because the coefficient of expansion of use material is bigger than normal, waste lot of manpower and material resources.
Summary of the invention
For overcoming above-mentioned defective, the invention provides a kind of shell-and-tube synthetic tower of rational in infrastructure, long service life, efficiently solve the structural deterioration problem that occurs because of expanding with heat and contract with cold in the prior art.
For achieving the above object, a kind of shell-and-tube synthetic tower comprises:
Housing, it comprises cylindrical shell and upper and lower two outer spherical end sockets;
Interior dome head, be placed in the outer spherical end socket of housing upper end and and the outer spherical end socket between leave end play, described in dome head lower ending opening and described openend be connected with the upper perforated plate outer fringe seal;
Upper perforated plate, the top and the interior dome head that are arranged in the described housing are tightly connected, and and housing between leave the gap;
Lower perforated plate is arranged on the bottom in the described housing and is connected with housing seal;
Reaction tube, every reaction tube vertically intert between described upper perforated plate and lower perforated plate and are tightly connected with upper perforated plate and lower perforated plate respectively, are filled with catalyst in the described reaction tube pipe;
Air inlet pipe, its lower end links to each other with interior dome head conducting and sealing; The upper end is passed the outer spherical end socket on top and is connected with the movable sealing of outer spherical end socket;
The above housing of described lower perforated plate is provided with water inlet and delivery port; The two ends of described every reaction tube respectively with the interior dome head on top, the outer spherical end socket conducting of bottom.
As a further improvement on the present invention: the top of described outer spherical end socket is provided with the sealing nipple, and described sealing nipple is socketed on the air inlet pipe and with the air inlet pipe movable sealing and is connected.
As the preferred embodiments of the present invention: the described sealing nipple movable sealing between air inlet pipe with it is packing seal, wherein form a packing cavity between air inlet pipe and the sealing nipple, at the packing cavity openend ring flange being set realizes compressing being tightly connected by screw, make simple, convenient filling, movable sealing is effective.
Another preferred embodiment of the present invention is: the movable sealing between described sealing nipple and the air inlet pipe is a bellow expansion joint, utilizes effective dilatation of its operative body bellows to absorb between the housing of synthetic tower and the reaction tube change in size that produces owing to reason such as expand with heat and contract with cold.
The present invention has broken through upper perforated plate, lower perforated plate in original synthetic tower fixed and formed seal cavity respectively with housing structure; It discharges upper perforated plate, and dome head in increasing makes between the upper and lower tube sheet and new seal of composition between the inside and outside dome head; And when the reaction tube expanded by heating, because the reaction tube lower end is fixed, then reaction tube can upwards be propped up upper perforated plate and moves together, since the end play that leaves between the inside and outside dome head guaranteed upper perforated plate on move distance, thereby really solved because the difference of the coefficient of expansion and swell increment is damaged the problem of synthetic tower, prolonged the service life of synthetic tower greatly from structure.After in like manner adopting said structure, changed in the former manufacture process dependence, used common stainless steel to produce, significantly reduced manufacturing cost material.
Description of drawings
Fig. 1 is an assembly structure schematic diagram of the present invention;
Fig. 2 is an A part enlarged drawing among Fig. 1;
Fig. 3 is a B part enlarged drawing among Fig. 1;
Fig. 4 is a C part enlarged drawing among Fig. 1;
Fig. 5 is a movable sealing structure schematic diagram among the embodiment 2.
Among the figure: 1 is housing; 1-1 is last outer spherical end socket; 1-2 is a cylindrical shell; 1-3 is following outer spherical end socket; 2 is upper perforated plate; 3 is lower perforated plate; 4 is reaction tube; 5 is interior dome head; 6 is air inlet pipe; 7 is water inlet; 8 is delivery port; 9 are the sealing nipple; 10 is packing cavity; 11 is ring flange; 12 is bellow expansion joint; 13 outlets.
The specific embodiment
Below by drawings and Examples technical scheme of the present invention is described in further detail.
Embodiment, as Fig. 1, Fig. 2, shown in Figure 3, the present invention relates to a kind of shell-and-tube synthetic tower, comprise housing 1, upper perforated plate 2, reaction tube 4, lower perforated plate 3, interior dome head 5, air inlet pipe 6 and outlet 13, wherein, housing 1 comprises cylindrical shell 1-2 and upper and lower two outer spherical end sockets, described outer spherical end socket 1-1 lower ending opening and its openend and the cylindrical shell welded seal gone up; Interior dome head 5 is placed in the last outer spherical end socket 1-1 of housing 1 upper end, its lower ending opening and described openend and upper perforated plate 2 outer rim welded seals; Leave the gap between upper perforated plate 2 and the housing 1, and have a plurality of jacks on the upper perforated plate 2; Also have many reaction tubes 4 in housing 1 between the lower perforated plate, be filled with catalyst in the every reaction tube 4, the upper end of every reaction tube 4 all pass upper perforated plate 2 and with airtight connection of jack of upper perforated plate 2, the upper port of reaction tube 4 and 5 conductings of interior dome head; Lower perforated plate 3 also has a plurality of jacks, and the other end of reaction tube 4 all passes lower perforated plate 3 and is connected with each jack is airtight; Lower perforated plate 3 and cylindrical shell 1 bottom welded seal, following outer spherical end socket 1-3 opening are upwards and the outer rim welded seal of its openend and lower perforated plate 3; The lower port of described reaction tube 4 is conducted with following outer spherical end socket 1-3; Outlet 13 is welded on down bottom and the conducting of outer spherical end socket 1-3; The lower end of air inlet pipe 6 and 5 conductings of interior dome head and welded seal, and its upper end is connected with last outer spherical end socket 1-1 movable sealing.Catalyst is packed into by air inlet pipe 6.The cylindrical shell 1-2 of described housing is provided with water inlet and delivery port, during synthetic tower work, saturation water by the drum down-comer is entered by upper perforated plate 2, lower perforated plate 3 and cylindrical shell 1-2 by the water inlet of lower end, in the seal chamber that gap between interior dome head 5 and the last outer spherical end socket 1-1 is formed, the steam water interface after being heated is connected with outside drum by pipeline from the top delivery port.
As shown in Figure 4: air inlet pipe 6 is connected with last outer spherical end socket 1-1 movable sealing and is specially: the top of dome head 1-1 is provided with sealing nipple 9 outside, described sealing nipple 9 be socketed in air inlet pipe 6 the outside and and air inlet pipe 6 between form a packing cavity 10, be placed with many elastic sealing strips in the packing cavity 10, be provided with ring flange 11 at the packing cavity openend, described ring flange 11 is connected with sealing nipple 9 by screw, and the filler that compresses in the cavity realizes that packing seal connects.
Embodiment 2: on the basis of Fig. 1, realize that with another kind of frame mode air inlet pipe 6 is connected with last outer spherical end socket 1-1 movable sealing, as shown in Figure 5: the top of dome head 1-1 is provided with sealing nipple 9 outside, described sealing nipple 9 is socketed in the outside of air inlet pipe 6, described sealing nipple 9 is a bellow expansion joint, and the upper end of bellow expansion joint 9 and air inlet pipe 6 are weldingly connected.Utilize effective dilatation of the operative body bellows of bellow expansion joint to absorb differential expansion between housing and the reaction tube, prolong the whole service life of synthetic tower greatly.
When synthetic tower of the present invention is worked, from about about the 200 degrees centigrade unstripped gas of the temperature of inlet tower gas preheater from the air inlet pipe at synthetic tower top enters reaction tube in this synthetic tower, axial flow is crossed the beds in the reaction tube from top to bottom, the reaction of generation catalytic exothermic, reacted gas then enters next equipment by the outlet outflow of following outer spherical end socket bottom, and water inlet and delivery port are used for the circulation of saturation water and take away partial reaction heat.
The present invention is a kind of efficient, and energy-saving synthetic tower by bundle of reaction tubes is immersed in the saturation water, makes that the temperature that can regulate beds effectively is even, the space-time yield height of catalyst, long service life.The present invention is by forming the upper perforated plate structure that can fluctuate in housing, and reaction tube can drive upper perforated plate and fluctuates together; Effectively compensated because the variation of the caused tube length of reaction tube stroke of expanding with heat and contract with cold and and housing between differential expansion, overcome in the original structure between the reaction tube and tube sheet, tube sheet and housing the easily defective of surrender of welding, reduced requirement on the one hand to material, can adopt material manufacturings such as common stainless steel, greatly reduce manufacturing cost, can improve the service life of synthetic tower on the other hand greatly, through experimental analysis, the service life of this synthetic tower is more than 15 years.
Above embodiment is only in order to technical scheme of the present invention to be described but not limit it, and those of ordinary skill in the art makes amendment or is equal to replacement the technical scheme of invention on the basis of understanding and also can not make amended technical scheme break away from the present invention program's spirit and protection domain.
Claims (4)
1. shell-and-tube synthetic tower is characterized in that comprising:
Housing, it comprises cylindrical shell and upper and lower two outer spherical end sockets;
Interior dome head, be placed in the outer spherical end socket of housing upper end and and the outer spherical end socket between leave end play, described in dome head lower ending opening and described openend be connected with the upper perforated plate outer fringe seal;
Upper perforated plate, the top and the interior dome head that are arranged in the described housing are tightly connected, and and housing between leave the gap;
Lower perforated plate is arranged on the bottom in the described housing and is connected with housing seal;
Reaction tube, every reaction tube vertically intert between described upper perforated plate and lower perforated plate and are tightly connected with upper perforated plate and lower perforated plate respectively, are filled with catalyst in the described reaction tube pipe;
Air inlet pipe, its lower end links to each other with interior dome head conducting and sealing; The upper end is passed the outer spherical end socket on top and is connected with the movable sealing of outer spherical end socket;
The above housing of described lower perforated plate is provided with water inlet and delivery port; The two ends of described every reaction tube respectively with the interior dome head on top, the outer spherical end socket conducting of bottom.
2. shell-and-tube synthetic tower according to claim 1 is characterized in that: the top of described outer spherical end socket is provided with the sealing nipple, and described sealing nipple is socketed on the air inlet pipe and with the air inlet pipe movable sealing and is connected.
3. shell-and-tube synthetic tower according to claim 2, it is characterized in that: be packing seal between described sealing nipple and the air inlet pipe, wherein seal and form a packing cavity between nipple and the air inlet pipe, at the packing cavity openend ring flange is set and realizes compressing being tightly connected by screw.
4. shell-and-tube synthetic tower according to claim 2 is characterized in that: be tightly connected for bellow expansion joint between described sealing nipple and the air inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101849021A CN102247783A (en) | 2011-07-04 | 2011-07-04 | Shell-and-tube synthesizing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101849021A CN102247783A (en) | 2011-07-04 | 2011-07-04 | Shell-and-tube synthesizing tower |
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| CN102247783A true CN102247783A (en) | 2011-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101849021A Pending CN102247783A (en) | 2011-07-04 | 2011-07-04 | Shell-and-tube synthesizing tower |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201701922U (en) * | 2010-02-24 | 2011-01-12 | 杭州林达化工技术工程有限公司 | Catalytic reaction equipment |
| CN202212182U (en) * | 2011-07-04 | 2012-05-09 | 常州市金州化工科技有限公司 | Shell and tube type synthesizing tower |
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2011
- 2011-07-04 CN CN2011101849021A patent/CN102247783A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201701922U (en) * | 2010-02-24 | 2011-01-12 | 杭州林达化工技术工程有限公司 | Catalytic reaction equipment |
| CN202212182U (en) * | 2011-07-04 | 2012-05-09 | 常州市金州化工科技有限公司 | Shell and tube type synthesizing tower |
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Application publication date: 20111123 |