CN215973190U

CN215973190U - Steel welding atmospheric storage tank bottom companion heat structure

Info

Publication number: CN215973190U
Application number: CN202120895229.1U
Authority: CN
Inventors: 李阳; 李京瑞; 葛阳; 梁宏斌; 任超
Original assignee: Hualu Engineering and Technology Co Ltd
Current assignee: Hualu Engineering and Technology Co Ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2022-03-08
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a steel welding atmospheric storage tank bottom heat tracing structure, which is characterized in that two layers of bottom plates with a certain distance are arranged at the bottom of the tank, the lower layer of the tank bottom is a conventional storage tank bottom plate and is mainly used for tank bottom sealing and foundation bolt seat installation, and a plurality of groups of support rib plates are welded on the upper surface of the steel welding atmospheric storage tank bottom heat tracing structure; the upper bottom plate is supported by the support rib plate and the support ring on the inner side of the tank wall, has a certain inclination angle, and is welded with a plurality of groups of half buckling pipes on the lower surface. The structure effectively realizes absolute isolation of the process system and the heat tracing system, avoids the problems that the tank bottom heat tracing pipe is immersed in the process medium and the purity is reduced due to the fact that steam enters the process medium to react or the separation is difficult after the heat tracing pipe is accidentally revealed in the prior structure, effectively solves the heat tracing problem when part of special process medium is stored, and is safe, reliable, high in economical efficiency, simple in structure and convenient to install.

Description

Steel welding atmospheric storage tank bottom companion heat structure

Technical Field

The utility model relates to a tank bottom heat tracing structure of a steel welding normal pressure storage tank, and relates to the field of chemical product storage.

Background

In chemical production, some process media have high solidification point and high viscosity, and in order to prevent materials from being solidified in a storage tank, maintain the process operation temperature and ensure the normal transportation of the materials in a low-temperature environment, the storage tank needs to be subjected to heat tracing and heat preservation, and the process media are heated to a specific temperature. In the conventional tank bottom heat tracing structure, as shown in fig. 8 and 9, a heat tracing element is always immersed in a process medium, but if the medium in a storage tank is corrosive or the heat tracing element has welding and processing defects, the heat tracing medium is easy to leak in long-term operation, so that the heat tracing medium enters the process medium side to react or the process medium and the heat tracing medium are difficult to separate, thereby reducing the purity of a product, and causing safety accidents and economic losses in serious cases. Aiming at the problem, an outer coil pipe heat tracing structure is generally adopted for replacing the existing structure, but the structure has low heat transfer efficiency, large heat loss and poor economical efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a steel-made welding atmospheric storage tank bottom heat tracing structure which is absolutely isolated from a process system, so as to solve the problems that the prior heat tracing element leaks when immersed in a process medium, the heat tracing medium enters the process medium side to react or the process medium is difficult to separate from the heat tracing medium, and the purity of the product is reduced, thereby effectively solving the heat tracing problem when part of special process medium is stored.

To achieve the above object, the technical solution of the present invention includes the following:

a steel atmospheric storage tank bottom heat tracing structure is arranged at the bottom of a storage tank and comprises a lower tank bottom plate, a support ring, an upper tank bottom plate, a support rib plate, a half buckle pipe, a discharge pipe, a heat tracing medium inlet and outlet pipe and a blocking plate;

the upper surface of the lower tank bottom plate is welded with a plurality of groups of supporting rib plates;

the upper tank bottom plate is supported by a support ring welded on the inner wall of the storage tank and a support rib plate welded on the lower tank bottom plate, so that a certain distance is ensured between the lower tank bottom plate and the upper tank bottom plate;

the upper tank bottom plate is installed at a certain inclination angle relative to the lower tank bottom plate, and a liquid discharge hole is formed in one side, which is lower than the installation position, of the upper tank bottom plate and is connected with a clean discharge pipe;

the lower surface of the upper tank bottom plate is welded with a plurality of groups of half-buckling pipes, the ports at the two ends of the half-buckling pipes are provided with blocking plates, and the inner sides of the blocking plates are connected with heat tracing medium inlet and outlet pipes.

Preferably, the inclination of the upper layer tank bottom plate is not more than 1.5%, and the supporting rib plates are welded on the lower layer tank bottom plate after lofting and blanking according to the inclination required by the upper layer tank bottom plate.

Preferably, the spacing between adjacent buttress plates should be no greater than 500 mm.

Preferably, the half-buckles are grouped according to the diameter of the storage tank, and the length of each group of half-buckles is not more than 30 m.

The function of the heat tracing structure is realized by the following characteristics: when the device operates, the process medium enters the space above the bottom plate of the upper tank for storage, the heat tracing medium is introduced into the half buckling pipe to realize bottom heat tracing, the process medium is completely discharged through the discharge pipe, and the heat tracing medium circulates through the heat tracing medium inlet and outlet pipe, so that the process system and the heat tracing system are effectively isolated.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model can realize the absolute isolation of the process system and the heat tracing system, and solves the problem that the prior storage tank enters the process medium after the heat tracing medium leaks, so that the two media react or are difficult to separate, thereby causing the pollution of the process product; meanwhile, the structure can effectively improve the heat transfer efficiency, avoid heat loss and improve the safety and the economy of storage of the storage tank.

Drawings

FIG. 1 is a schematic view of the tank bottom heat tracing structure of the storage tank of the present invention.

FIG. 2 is a schematic view of the arrangement of half-clasped tubes on the lower surface of the bottom plate of the upper tank.

FIG. 3 is a schematic view of the arrangement of the supporting rib plates on the upper surface of the bottom plate of the lower tank.

FIG. 4 is a detailed view of the connection between the upper tank bottom plate and the inner wall support ring of the storage tank.

Fig. 5 is a detail view of a half-buckle tube weld.

FIG. 6 is a groove structure at the overlapping position of the supporting rib plate and the half buckle pipe.

Fig. 7 is a detailed view of a half-buckle tube port closure.

Fig. 8 is a front view of a tank bottom submerged type inner coil heat tracing structure currently used.

Fig. 9 is a top view of a tank bottom submerged internal coil heat tracing structure currently in use.

The reference numbers illustrate: 1-lower tank bottom plate, 2-support ring, 3-upper tank bottom plate, 4-support rib plate, 5-half buckle pipe, 6-exhaust pipe, 7-heat tracing medium inlet and outlet pipe, and 8-blocking plate.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples of the present invention without any inventive step, are within the scope of the present invention.

As shown in fig. 1, the tank bottom heat tracing structure of the steel atmospheric storage tank comprises a lower tank bottom plate 1, a support ring 2, an upper tank bottom plate 3, a support rib plate 4, a half buckle pipe 5, a drain pipe 6, a heat tracing medium inlet and outlet pipe 7 and a blocking plate 8;

the bottom heat tracing structure of the steel atmospheric storage tank needs to arrange two layers of bottom plates with a certain distance at the bottom of the tank, the bottom plate 1 at the lower layer is a bottom plate of a conventional storage tank, as shown in figure 2, the bottom heat tracing structure is mainly used for sealing the bottom of the tank and mounting a foundation bolt seat, and a plurality of groups of support rib plates 4 are welded on the upper surface of the bottom heat tracing structure; the upper tank bottom plate 3 is supported by a support rib plate 4 and a support ring 2 on the inner side of the tank wall, has a certain inclination angle, and is welded with a plurality of groups of half buckling pipes 5 on the lower surface. The support ring 2 can be made of angle steel or flat steel, and the weld joint of the support ring 2 and the inner wall of the storage tank after welding is subjected to 100% penetration detection.

As shown in fig. 3, the inclination of the upper tank bottom plate 3 is not more than 1.5%, and the supporting rib plates 4 are welded on the lower tank bottom plate 1 after lofting and blanking according to the inclination required by the upper tank bottom plate 3;

the distance between the adjacent supporting rib plates 4 is not more than 500 mm;

as shown in fig. 4, the half-bucking pipes 5 should be grouped according to the diameter of the storage tank, and the length of each group of half-bucking pipes is not more than 30 m.

As shown in fig. 5, after the half-buckled pipe 5 is welded with the lower surface of the upper tank bottom plate 3, 100% penetration detection is performed on the fillet weld and the splicing weld of the half-buckled pipe; after the upper tank bottom plate 3 and the half buckling pipe 5 are welded and detected, the upper tank bottom plate is arranged in a storage tank before the tank top is installed; continuous welding is adopted between the upper tank bottom plate 3 and the support ring 2, and the height of the welding leg is not less than the thickness of the upper tank bottom plate 3.

As shown in figure 1, the upper tank bottom plate 3 is installed at a certain inclination angle relative to the lower tank bottom plate 1, and the upper tank bottom plate 3 is provided with a drainage hole at the lower side of the installation position and is connected with a drainage pipe 6.

As shown in fig. 6 and 7, a plurality of groups of half-buckled pipes 5 are welded on the lower surface of the lower tank bottom plate 3, blocking plates 8 are arranged at two end ports of the half-buckled pipes 5, and the inner sides of the blocking plates 8 are connected with heat tracing medium inlet and outlet pipes.

When the device is operated, the process medium enters the space above the upper tank bottom plate 3 for storage, the heat tracing medium is introduced into the half buckling pipe 5 to realize bottom heat tracing, the process medium is completely discharged through the discharge pipe 6, and the heat tracing medium circulates through the heat tracing medium inlet and outlet pipe 7, so that the process system and the heat tracing system are effectively isolated.

The above-described embodiments are intended to explain the technical problems and aspects of the present invention in further detail, and should not be construed as limiting the present invention. It should be understood that the directions or positional relationships indicated in the present invention are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention, and do not indicate or imply that the components indicated must have a specific direction. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel welding atmospheric storage tank bottom heat tracing structure is arranged at the bottom of a storage tank and is characterized by comprising a lower-layer tank bottom plate (1), a support ring (2), an upper-layer tank bottom plate (3), a support rib plate (4), a half buckle pipe (5), a drain pipe (6), a heat tracing medium inlet and outlet pipe (7) and a blocking plate (8);

the upper surface of the lower tank bottom plate (1) is welded with a plurality of groups of supporting rib plates (4);

the upper tank bottom plate (3) is supported by a support ring (2) welded on the inner wall of the storage tank and a support rib plate (4) welded on the lower tank bottom plate (1), so that a certain distance is ensured between the lower tank bottom plate (1) and the upper tank bottom plate (3);

the upper tank bottom plate (3) is installed at a certain inclination angle relative to the lower tank bottom plate (1), and a drainage hole is formed in one side, which is lower than the installation position, of the upper tank bottom plate (3) and is connected with a drainage pipe (6);

the lower surface of the upper tank bottom plate (3) is welded with a plurality of groups of half-buckling pipes (5), two end ports of the half-buckling pipes (5) are provided with blocking plates (8), and the inner sides of the blocking plates (8) are connected with heat tracing medium inlet and outlet pipes.

2. The steel welding atmospheric storage tank bottom heat tracing structure according to claim 1, characterized in that the inclination of the upper tank bottom plate (3) is not more than 1.5%, and the support rib plate (4) is welded on the lower tank bottom plate (1) after lofting and blanking according to the required inclination of the upper tank bottom plate (3).

3. The steel welding atmospheric storage tank bottom heat tracing structure according to claim 2, characterized in that the distance between adjacent supporting rib plates (4) should not be more than 500 mm.

4. The steel welding atmospheric storage tank bottom heat tracing structure according to claim 1, characterized in that half-buckling pipes (5) are grouped according to storage tank diameter, and the length of each group of half-buckling pipes is not more than 30 m.