CN111232448A

CN111232448A - Partition type assembled inner floating roof made of stainless steel

Info

Publication number: CN111232448A
Application number: CN202010268073.4A
Authority: CN
Inventors: 陈桂华; 刘岭; 周海清
Original assignee: Hunan Changjiang Petrochemical Environmental Protection Technology Co ltd
Current assignee: Hunan Changjiang Petrochemical Environmental Protection Technology Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-06-05

Abstract

A stainless steel compartmentalized, assembled, internal floating roof, comprising: the floating cabin, the edge plate, the peripheral seal, the floating cabin strut, the central vent valve, the oil hole and the passing device; the floating cabins are multiple, the floating cabins are staggered in a shape like a Chinese character 'pin', and adjacent floating cabins are connected in series through square steel; the edge plate is arranged on the outer ring of each floating cabin and is connected with each floating cabin into a whole; the peripheral seal is arranged on the edge plate and used for realizing the seal between the edge plate and the side wall of the storage tank; the floating plate support is supported at the bottom of the floating plate body. The invention can improve the integral strength of the product and effectively isolate oil gas volatilization.

Description

Partition type assembled inner floating roof made of stainless steel

Technical Field

The invention belongs to the technical field of petrochemical industry, and particularly relates to a stainless steel compartment type assembled inner floating roof.

Background

The inner floating roof is a floating roof structure which can float on the liquid level of the liquid petrochemical product and float and lift along with the liquid petrochemical product. Internal floating roofs are commonly used in liquid petrochemical storage tanks. The device is used for preventing the volatilization loss of the medium in the storage tank, and has the functions of saving energy, protecting the environment and improving the safety. The existing inner floating roof mainly comprises: a float-type inner floating roof, a full-liquid-connection honeycomb-type inner floating roof, a magnetic steel inner floating roof and a glass fiber reinforced plastic inner floating roof. These prior art structures have the following problems, respectively: the oil gas volatilization space is arranged below the skin cover plate of the float-type inner floating roof, and is dissipated to the upper part of the floating disc through the floating disc gap and accessory facilities, and finally is discharged to the atmosphere. The structure is influenced by fluctuation of the liquid level of the received and sent oil products, blowing replacement impact, stress blockage of the floating disc of the storage tank and the like in the operation process, and the structure is easy to collapse and sink. The structural strength is low. The carbon steel inner floating roof uses steel plates as main raw materials, the steel plates are heavy and easy to clamp, the problem that the floating cabin is damaged after rust sand holes are leaked in the floating cabin and buoyancy of the floating cabin fails to cause disc deflection and clamp accidents is solved, the wall of the tank needs to be damaged to open a gantry or open the top of the tank, the structural strength of the storage tank is damaged, and the construction period is too long. The upper and lower plates of the full liquid-receiving honeycomb type inner floating roof honeycomb plate are glued, when the floating plate runs under resistance, the structure and the honeycomb plate are damaged, oil is splashed above the floating plate and then enters the honeycomb plate to cause buoyancy failure, and then the floating plate sinks to finally cause the sinking of the floating plate. Part connects liquid honeycomb formula inner floating roof producer entirely, has some defects in the aspect of the frame roof beam structural design for floating plate overall structure is not strong, has the problem in the design of girder in addition, does not have the both ends of shutoff roof beam, makes originally the girder of buoyancy element lose buoyancy, has become the oil storage space on the contrary. The glass steel inner floating roof is a low-melting-point material, and does not meet GB 50160-2018 petrochemical industry enterprise design fire protection standard. Therefore, how to develop a new type of inner floating roof to overcome the above problems of the existing similar products is the direction of research needed by those skilled in the art.

Disclosure of Invention

The invention provides a stainless steel compartment type assembled inner floating roof which can improve the overall strength of products and effectively isolate oil gas volatilization.

The technical scheme is as follows:

a stainless steel compartmentalized, assembled, internal floating roof, comprising: a buoyancy module, a marginal plate, a peripheral seal and a buoyancy module strut; the floating cabins are multiple, the floating cabins are staggered in a shape like a Chinese character 'pin', and adjacent floating cabins are connected in series through square steel; the edge plate is arranged on the outer ring of each floating cabin and is connected with each floating cabin into a whole; the peripheral seal is arranged on the edge plate and used for realizing the seal between the edge plate and the side wall of the storage tank; the floating plate support is supported at the bottom of the floating plate body; and an automatic ventilation valve, a passing device and a manhole are arranged on the floating chamber.

By adopting the technical scheme: the floating roof is composed of a plurality of floating cabin chains, so that the floating roof is suitable for inner floating roof tanks with various sizes. The peripheral seal is matched with the edge plate to realize the seal between the floating cabin and the inner wall of the storage tank, and the problem that the adhesive honeycomb plate is likely to leak is solved. The automatic ventilation valve mainly has the function of providing a gas circulation channel when pressure difference is formed between the upper part and the lower part of the floating roof, so that pressure balance is guaranteed. When the inner floating roof is at the supporting position, the vent valve is opened; the vent valve should be able to close itself when the inner floating roof is in a floating state. The automatic ventilation valve mainly comprises a valve body, a valve cover and a valve rod, wherein the valve cover is composed of a plate-matching rubber sealing gasket, and the sealing effect in the working state is ensured to the maximum extent. The opening height of the valve cover of the automatic ventilation valve is designed to be 150-250 mm, and the flow area between the valve cover and the valve body is larger than the flow area provided by the drift diameter of the valve body. The passing device is a protection device when the guide column or the wave guide tube passes through the inner floating roof, and 4-5 guide wheels are arranged to prevent the guide column or the wave guide tube from damaging the inner floating roof in the up-down running process of the inner floating roof. The manhole mainly has the function of facilitating personnel to reach the top of the floating plate through the floating plate when the inner floating roof is convenient to inspect and maintain. Locate in the assembled internal floating roof, manhole lower part installation vertical ladder, the distance of vertical ladder lower extreme to tank bottoms board should not be less than 200mm, and should not be greater than 300 mm. The manhole size is 600 x 500mm, and the installation position is preferably close to the manhole of the tank wall for facilitating the tank inlet.

Preferably, in the above-mentioned stainless steel bay type assembled inner floating roof: an anti-rotation device is further arranged on the floating cabin; the anti-rotation device adopts a plurality of strands of stainless steel wire ropes, and two ends of the anti-rotation device are respectively connected with the fixed top and the inner floating top.

By adopting the technical scheme: the anti-rotation device is arranged to prevent the inner floating roof from excessively swinging in the vertical running process, so that the floating disc cannot generate excessive deviation and prevent the disc from sinking. The anti-rotation device is preferably a phi 8mm multi-strand stainless steel wire rope.

More preferably, in the above-described compartment-type assembled inner floating roof made of stainless steel: and a static conductive outlet is also arranged on the floating cabin. A static conductive outlet is also arranged on the floating cabin; and two ends of the static electricity leading-out wire are respectively connected with the inner floating roof and the fixed roof.

By adopting the technical scheme: the static electricity leading-out line has the main function of directly leading static electricity generated by the floating disc into the ground, and dangerous accidents caused by static electricity accumulation are avoided. The static conductive outgoing line adopts a whole stainless steel wire rope with the diameter of 5mm to connect the inner floating roof with the fixed roof. The stainless steel wire rope should meet the GB/T9944 regulations, and the number of static electricity leading-out wires should not be less than 2. The static conductive outgoing line is reliably connected with the inner floating roof and the tank top. The connecting piece is preferably made of stainless steel. The end of the wire should be added with a stainless steel wire joint, and is provided with a special electric connecting terminal made of stainless steel, and two stainless steel bolts, which are not less than M10, are adopted at two ends to be fixed with a locking gasket and double nuts. The length margin of the static electricity lead-out wire is not smaller than 1000 mm.

More preferably, in the above-described compartment-type assembled inner floating roof made of stainless steel: and reinforcing ribs are arranged on the floating cabin.

More preferably, in the above-described compartment-type assembled inner floating roof made of stainless steel: the stainless steel compartment type assembled inner floating roof is made of stainless steel.

By adopting the technical scheme: compared with the prior art, the invention achieves the following technical effects:

the vertical edge welding adopts inner and outer double-sided welding, each welding seam is subjected to kerosene penetration detection, and the parallel edge automatic laser welding ensures the welding strength and the dimensional precision and ensures no leakage; by matching with high-efficiency peripheral sealing, the volatilization of the stored liquid can be better prevented, the volatilization of oil gas can be effectively prevented, and the effect can reach 99%; the strength is more than 5 times of the requirement of API650 (H4.2.1.4), the floating cabin is fully welded and sealed to form a sealed cavity which is not infiltrated by liquid; a stainless steel bay type assembled inner floating roof belongs to a steel double-disc type inner floating roof and meets the requirement of GB50160-2008 (2018 edition); the floating cabin adopts an all-welding technology, and the four vertical sides are fully welded inside and outside to prevent liquid infiltration; the bottom surface of the inner floating roof floats on the liquid level, has no oil-gas space and belongs to a full-liquid-receiving inner floating roof; the floating cabin is provided with the access hole, the steam can be decompressed when being blown, and the floating cabin can be directly detected whether to leak or not when being maintained, so that the oil in the floating cabin can be conveniently discharged if the oil is leaked, the construction safety is improved, and the accident is prevented.

Drawings

The invention is described in further detail in the following description of embodiments with reference to the accompanying drawings:

FIG. 1 is a schematic top view of the floating deck of the present invention, in which a plurality of floating chambers are connected to form a disc-shaped floating deck;

FIG. 2 is a schematic view of the connection structure of adjacent buoyancy modules of FIG. 1;

FIG. 3 is a schematic structural view of the buoyancy module and the peripheral seal;

FIG. 4 is a schematic view of the connection between the floating cabin and the fixed roof;

fig. 5 is a schematic structural view of a reinforcing rib in the buoyancy chamber.

The corresponding relation between each reference mark and the part name is as follows:

1. a buoyancy chamber; 2. an edge plate; 3. peripheral sealing; 4. a buoyancy module strut; 5. a floating plate support; 6. a sidewall of the storage tank; 51. a central vent valve; 52. an oil hole; 53. a pass-through device; 54. an anti-rotation device; 55. leading out a static electricity conducting wire; 11. square steel; 12. reinforcing ribs; 111. and (4) bolts.

Detailed Description

In order to more clearly illustrate the technical solution of the present invention, the above description will be further described with reference to various embodiments.

Example 1 as shown in fig. 1-5:

a stainless steel compartmentalized, assembled, internal floating roof, comprising: a floating cabin 1, a marginal plate 2, a peripheral seal 3 and a floating cabin strut 4;

a plurality of floating cabins 1 are arranged, the floating cabins are staggered in a shape like a Chinese character 'pin', and adjacent floating cabins 1 are connected in series through square steel 11; the edge plate 2 is arranged on the outer ring of each floating cabin 1 and is connected with each floating cabin 1 into a whole; the peripheral seal 3 is arranged on the edge plate 2 and used for realizing the seal between the edge plate 2 and the side wall of the storage tank; the floating plate strut 5 is supported at the bottom of the floating plate body;

an automatic ventilation valve 51 is arranged on the buoyancy module 1, and a passing device 52, a manhole 53 and an anti-rotation device 54 are arranged on the buoyancy module; the anti-rotation device 54 is a multi-strand stainless steel wire rope. The opening height of the valve cover of the automatic ventilation valve is designed to be 150-250 mm, and the flow area between the valve cover and the valve body is larger than the flow area provided by the drift diameter of the valve body. The passing device is a protection device when the guide column or the wave guide tube passes through the inner floating roof, and 4-5 guide wheels are arranged to prevent the guide column or the wave guide tube from damaging the inner floating roof in the up-down running process of the inner floating roof. The manhole mainly has the function of facilitating personnel to reach the top of the floating plate through the floating plate when the inner floating roof is convenient to inspect and maintain. Locate in the assembled internal floating roof, manhole lower part installation vertical ladder, the distance of vertical ladder lower extreme to tank bottoms board should not be less than 200mm, and should not be greater than 300 mm. The manhole size is 600 x 500mm, and the installation position is preferably close to the manhole of the tank wall for facilitating the tank inlet. A static electricity outgoing line 55 is also arranged on the buoyancy module 1; and two ends of the static electricity lead-out wire 55 are respectively connected with the inner floating roof and the fixed roof. The static conductive outgoing line adopts a whole stainless steel wire rope with the diameter of 5mm to connect the inner floating roof with the fixed roof. The stainless steel wire rope should accord with the regulation of GB/T9944, the end part of the wire should be added with a stainless steel wire joint, and is provided with a special electric connecting terminal made of stainless steel, and two ends of the stainless steel wire rope are fixed by two stainless steel bolts, namely a check gasket and two nuts, which are not less than M10. The length margin of the static electricity lead-out wire is not smaller than 1000 mm. And reinforcing ribs 12 are also arranged on the floating cabin 1. The stainless steel compartment type assembled inner floating roof is made of stainless steel.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. The protection scope of the invention is subject to the scope of the claims.

Claims

1. The utility model provides a stainless steel compartment formula equipment internal floating roof which characterized in that includes: a floating cabin (1), a marginal plate (2), a peripheral seal (3) and a floating cabin strut (4);

a plurality of floating cabins (1) are arranged, the floating cabins are staggered in a shape like a Chinese character 'PIN', and adjacent floating cabins (1) are connected in series through square steel (11); the edge plates (2) are arranged on the outer ring of each floating cabin (1) and are connected with each floating cabin (1) into a whole; the peripheral seal (3) is arranged on the edge plate (2) and is used for realizing the seal between the edge plate (2) and the side wall of the storage tank; the floating plate strut (4) is supported at the bottom of the floating plate body;

an automatic ventilation valve (51), a passing device (52) and a manhole (53) are arranged on the floating cabin (1).

2. The stainless steel bay type assembled inner floating roof as set forth in claim 1, wherein: an anti-rotation device (54) is further arranged on the floating cabin (1); the anti-rotation device (54) adopts a plurality of strands of stainless steel wire ropes, and two ends of the stainless steel wire ropes are respectively connected with the fixed roof and the inner floating roof.

3. The stainless steel bay type assembled inner floating roof as set forth in claim 1, wherein: a static electricity outgoing line (55) is also arranged on the buoyancy chamber (1); and two ends of the static electricity lead-out wire (55) are respectively connected with the inner floating roof and the fixed roof.

4. The stainless steel bay type assembled inner floating roof as set forth in claim 1, wherein: and reinforcing ribs (12) are arranged on the floating cabin (1).

5. The stainless steel bay type assembled inner floating roof as set forth in claim 1, wherein: the stainless steel compartment type assembled inner floating roof is made of stainless steel.