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INVENTION
Russian Federation Patent RU2153626

SHIP STEAM BOILER

Name of the inventor: Mogens Jensen Vincent (DK); Moseker Bodil Nielsen (DK); Olav KNUDSEN (DK)
The name of the patentee: Aalborg BOYLERS MARINE A / S (DK)
Address for correspondence: 129010, Moscow, ul. Bolshaya Spasskaya 25, page 3, Ltd. "Gorodissky & Partners", Tomsk EV
Starting date of the patent: 1995.06.14

The boiler is designed for the production of steam and can be used in thermal power generation. The boiler comprises a steam generating tubes located in the furnace wall and in the wall of the housing and communicating with upper and lower annular tanks for establishing communication from the furnace into the annular inner space. At least one of the two walls of the furnace wall and casing wall and preferably both walls consist of steam generating tubes connected by intermediate flanges. Thus, the boiler is more stable and is not limited to a certain maximum length, but may be constructed with any size or length in order to obtain the desired effect. Moreover, the boiler has a higher reliability, a compact arrangement, a low weight and a high reliability in operation, and occupies only a small space and is simple to install and maintain.

DESCRIPTION OF THE INVENTION

The invention relates to a boiler for producing steam and energy can be used.

Known boilers fitted, a generally cylindrical combustion chamber, which comprises vertical tubes, and wall of the housing, which structure also comprises vertical tubes, which is the area of ​​heat transfer in the form of a shell of the drum between the furnace wall and the wall of the housing (FR 2385981).

Known boilers in which the drum around the furnace wall is formed by the water pipes arranged close to each other to create a substantially gas-impermeable wall. At some distance from the furnace wall outside the wall of the housing is formed by pipes placed at a distance from each other and connected by narrow flanges welded so as to form adjacent membrane wall. In the heat exchange vessel, which is a substantially annular reservoir located between the furnace wall and the casing wall, a suitable number can be provided separately standing pipes. The flue gases from the furnace are located in barabanoobrazny vessel through appropriate apertures and are circulating therein so that they can give their heat to steam generating tubes. The end faces of the cylinder formed by the water tank, perform the functions of collections for pipes, all of which extend parallel to the axis (VS 4852813).

Constructions of this nature are quite complex in construction and suffer a variety of drawbacks. It may be difficult to make an assessment of the furnace is completely gas-tight and therefore there is a risk that part of the hot gases will leak through the channels, not intended for this purpose. Area is difficult to control the boiler and heat exchanger cleaning, because the tubes are in a strictly circular configuration concentric to the cylinder axis. Installing the pipe wall currents of the end faces in the water tank is not very simple, when the pipe is set so close that they are in contact with each other. It may be impossible to do in the water tank group of holes corresponding to the tubes, so you have to provide a reduced size or special-tube collectors.

The exterior panel wall is established by welding narrow flange parts such as between the tubes after they are placed with their ends in the installation of the corresponding water tank. However, the welding operation is rather complicated, because the probability of their pipe welding deformation. These difficulties make it uneconomic location corresponding to the inner wall of the hinged panels around the firebox. Although the tube in the outer wall of the hinged panels are welded to each other in the furnace tube wall and in the interspace between the furnace wall and the panel wall in the known design are unsupported between the ends thereof. The lack of support may cause problems, especially if the boiler is exposed to vibrations, in the case of installation in ships. This introduces restrictions on the possible length of the pipe corresponding to the known design. The limited length causes a defined area of ​​the heating surface, which requires a larger number of tubes than would have to be otherwise. Moreover, the limited length reduces the effect to achieve, and which must be properly constructed boiler, burner because the free must have a certain length, depending on the effect that the flame could take shape to ensure complete combustion.

The present invention is to provide a boiler of the above type which does not suffer the aforementioned disadvantages of the prior art. In particular, the object of the present invention is to provide a boiler which is more stable than the boilers already known and which is not limited to a certain maximum length, but may be set at any length and size to produce the desired effect. Another object of the invention is to provide a boiler which has the additional advantages compared to known boilers, for example, in terms of overall reliability, a compact form, light weight and high reliability in operation, which requires only a limited space, easy to install and maintain.

These problems are solved by the development of a boiler, comprising a wall of the furnace defining a furnace wall of the housing concentrically enclosing the furnace wall and delimiting together with the wall of the furnace substantially annular inner space, the upper and lower tanks arranged respectively above and below the furnace, steam generating tubes, located in the furnace wall and casing wall and communicating with the upper and lower tanks, and opening for flue gases is provided in the furnace wall for establishing communication from the furnace into the annular inner space and the furnace wall and / or wall of the housing consists of a substantially straight steam generating tubes connected by intermediate flanges.

By constructing enclosure walls and / or walls of the boiler furnace in the above manner, i.e. by constructing the housing wall and / or the furnace wall from substantially straight paroprovodyaschih pipes which are connected by intermediate flanges, a boiler construction is obtained with excellent mechanical strength and stability due to the support, which thus provides for the wall in question.

Substantially rectilinear steam generating tubes of the furnace wall and / or walls of the boiler body according to the present invention can be connected by intermediate flanges in any known manner, such as by fastening lugs in applying press fits, etc.

According to the present invention, the housing and / or insert in cross-section have the shape of a polygon, each side of which is finished panel wall formed by steam generating tubes connected by intermediate membranes. Each of the plane parts comprises a prefabricated panel wall consisting of a number of longitudinal tubes, e.g. 5-8, connected to the intermediate flanges (membranes). The walls of the hinged panels of this type can be produced in certain conditions in the effective sequence of operations and with a very exact result. Depending on the size of the finished boiler, the membrane wall may have 9-14 sides, the inner membrane and the outer wall are similar, so that the interior space between them has a constant width. To improve the structure of the wall panels can be hinged to provide one or more plates projecting in a transverse direction and serving freestanding support tube in the inner space between the two walls of the hinged panels.

These support plates have suitable crossing holes through which you can pass free-standing pipe. Free standing tubes in the spaces between the membrane walls are arranged in rows parallel to the respective polygonal walls. Inspection of pipes, for example to detect leaks, and soot blowing in order to clean it, can be carried out anywhere in the heat exchange vessel from a limited number of holes. For this purpose, you can use the sump and the inspection door in the adjacent sides of the polygon, but also can provide a certain amount of observation holes just the right size, which allows you to insert soot blowers, etc. pereskop Special inspection apertures need only have the second polygon on each side at locations which otherwise can not be risen. A free-standing tube so as to provide a suitable space outside inspection holes for allowing inspection of all control intervals between the tubes.

The polygonal construction provides the final boiler with an excellent mechanical strength and this feature in combination with the presence of the gaps in the support tube allows the boiler to produce process relatively large length without causing thus problems with vibration. Moreover, the polygonal membrane wall provides a gas tight construction. The use of polygonal membrane walls as furnace wall and casing wall has the effect that can be placed free standing convection tubes along parallel straight lines. This provides a significant advantage in that it is possible to inspect and clean all free-standing pipe of the holes at the corners of the shell. The design of the furnace wall in the form of a continuous membrane wall provides the tubes with a very good support so that they are more protected against vibration and pressure influences. The inner membrane wall contains fewer tubes than a corresponding furnace wall built of tubes closely facing, and therefore, it is easier and simpler to install. The membrane walls and the polygonal construction and makes it relatively simple installation of a variety of necessary holes and connections.

The boiler according to the present invention is provided with a burner, which may be located, for example, in the center or at the bottom of the boiler.

The boiler according to the present invention can be used with other types of gas-oil boilers or economizers.

The boiler according to the present invention can be used as supplementary boiler for producing steam for many purposes, for example in connection with heating, release, cleaning, production of inert gas, etc.

In addition, the boiler according to the present invention can be used, for example, in applications for power plants, industrial plants, tankers, chemical tankers, ferries, etc.

Below will be described a specific preferred embodiment of the present invention with reference to the drawings in which

FIG. 2 depicts the gap from above and a perspective view along the line II-II of the drawing of the boiler of FIG. 1;

FIG. 1 shows a section II of the boiler of FIG. 2;

FIG. 3 shows a part of the housing wall, and

FIG. 4 shows a part of the housing wall and the outlet of the flue gases.

FIG. 2 shows a boiler 10 comprising a furnace wall 12 defining the furnace 22, the wall of the housing 14 surrounding the furnace wall 12 and defining together with the wall of the furnace substantially annular interspace 20. The furnace wall 12 comprises axially extending tubes 26 connected by flanges 18 and It comprises an opening 24 for establishing communication from the furnace 22 into the annular space 20. The inner wall 14 of the housing includes a tube extending along the axis 16 connected flanges 18 and 14 installed in the wall of a proper amount of inspection holes 30. The furnace wall and the casing wall are built as polygonal plates consisting of a number of prefabricated parts forming the panel wall consisting of a number of longitudinal pipes 16, 26 connected by intermediate flanges 18, to form the body and / or the furnace in cross-section in the shape of a polygon. In the internal space 20 established free standing steam generating tubes 28, which are arranged in straight lines extending parallel to the respective polygonal walls. Lower annular wall 32 limits an annular bottom vessel 62 in which are located the lower supporting member 34. In connection with the wall 14 of the body 36 provided with an opening for discharging flue gases. At the bottom of the boiler 10 in order to provide viewing access opening 42. In this case the wall panel provided with at least one plate projecting in a transverse direction, and it serves as a support free standing tubes in the interspace between said two walls.

FIG. 1 illustrates a boiler 10 comprising a furnace wall 12 defining the furnace 22, the wall of the housing 14 concentrically surrounding the furnace wall 12 and defining together with the wall of the furnace substantially annular interspace 20. The furnace wall and the casing wall are connected to the annular top and bottom vessels 60, 62 . The annular bottom vessel 62 comprises a bottom plate 48 which through bottom support members 34 connected to the lower tube plate 56. The annular upper tank 60 comprises an upper plate 50, which is provided in the manhole 58 and which by means of support members 52 connected to the upper pipe plate 54, the reservoir 60 is restricted and the wall 38 of the housing wall 64 of the furnace. In the annular top vessel 60 has a hole for the burner 68 surrounded by furnace wall 64. Provided the flue gas duct 70 communicating with hole 36 for discharging flue gases.

FIG. 3 shows part of end wall 14 of the housing of FIG. 2, comprising a pipe extending along the axis 16 connected by intermediate flanges 18 and comprising inspection apertures 30 arranged in the flanges 18.

FIG. 4 shows a part of the casing wall 14 and an outlet 36 for flue gases as shown in FIG. 2.

While the invention has been described above with reference to the drawing showing a preferred embodiment of the invention, those skilled in the art will appreciate that within the scope of the invention many modifications are possible compared to the above specific embodiment. Such modifications are within the scope of protection of the present invention as defined in the following patent claims.

CLAIM

1. Boiler for production of steam, comprising a wall (12) of the furnace defining a furnace (22), wall (14) of the housing concentrically enclosing wall (12) together with the furnace and the furnace wall defining a substantially annular interspace (20), the upper and lower reservoirs (60) and (62) respectively disposed above and below the furnace, steam generating tubes (16, 26) arranged on the furnace wall and the wall of the housing and communicating with the upper and lower reservoirs (60, 62) and the bore (24) for flue gases formed in the furnace wall for establishing communication from the furnace (22) into the annular space (20), the furnace wall and / or the housing wall consists of a substantially straight pipe (16, 26) connected by intermediate flanges, wherein that the housing and / or insert in cross-section have the shape of a polygon, each side of which is finished panel wall formed by joined by intermediate diaphragms steam generating tubes, the boiler further comprises free standing pipe (28) mounted in said inner space, wherein the panel wall provided with at at least one plate projecting in a transverse direction, and it serves as a support free standing tubes in the interspace between said two walls.

2. Boiler according to claim 1, characterized in that the number of tubes is from 5 to 8.

3. Boiler according to claim 1 or 2, characterized in that the number of panel portions is from 9 to 14 and said internal space formed by the furnace wall and casing wall has a constant width.

4. Boiler according to any one of claims 1 - 3, characterized in that it further comprises a burner located above, below or at the center of the furnace.

5. Boiler according to any one of claims 1 - 4, characterized in that the free-standing pipe mounted substantially straight lines extending substantially parallel rectilinear steam generating tubes of said furnace wall and / or the housing wall.

6. The boiler according to any one of claims 1 - 5, characterized in that the upper and / or lower tanks have an annular and / or cylindrical configuration.

print version
Publication date 25.03.2007gg

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