KR880000051B1 - Boiler - Google Patents

Abstract

The steam generating boiler comprises a vertical cylindrical housing (1) with a cylindrical water chamber (2) a the bottem, an amular steam chamber(1) a the top and on eccentric combustion chamber (3) defined by circumferentially spaced water tubes between them. The crescent-section space between the housing wall(3) and the combustion chamber tube wall is enclosed by a wall (5) of spaced vertical water tubes. This space forms a passage (12,13) for combustion gas containing steam tubes(4) and has a portion bunded by parts of the tube wall (9) and the combustion chamber tube wall respecpively containing down-flow water tubes. The passage (12,13) contains a horizontal partition (8) not extending into the drop tube portion so that the combusion gas first passes through the lower part (12) and rises alongside the drop tubes to enter into the upper part(13) which connects to lateral flue outlet(11).

Description

Boiler

1 is a longitudinal sectional view of a conventional vertical cylindrical marine auxiliary boiler.

Figure 2 is a broken perspective view of a conventional boiler auxiliary boiler.

Figure 3 (a) is a longitudinal sectional front view of the vertical cylindrical eccentric marine auxiliary boiler of the present invention.

4 (a) is a cross-sectional view taken along the line A-A of FIG. 3 (a).

4 (b) is a sectional view taken along the line B-B in FIG. 3 (a).

5-1 is a lateral plan view of a first embodiment in which the gas outlet of the vertical cylindrical eccentric marine auxiliary boiler of the present invention is changed.

5-2 is a cross-sectional plan view of the second embodiment of the present invention with the gas outlet changed.

5-3 is a cross-sectional plan view of the third embodiment of the present invention with the gas outlet changed.

* Explanation of symbols for main parts of the drawings

a: cylinder 1: steam chamber

2: water chamber 3: combustion chamber

4: evaporation tube 5: annular water cooling wall

6 burner 7 manhole

8: gas compartment plate 9: heating precipitation pipe

10: screen tube 11: gas outlet

12: Lower turning flow path 13: Upper turning flow path

14: screen tube

The present invention relates to an improvement of an auxiliary boiler for ships.

There are various types of auxiliary boilers for ships, such as two-pipe type, vertical cylindrical type (see Fig. 1), and associated type (see Fig. 2), but each has one end. In recent years, the energy saving of the ship is strongly required, but the same countermeasures are required for the vessel auxiliary boilers that do not comply. That is, the items required for the ship auxiliary boiler are as follows.

[1] Combustion chambers with sufficient burner flame dimensions, which do not touch the walls of the furnace, prevent the generation of dust, unburned carbon monoxide, etc., and improve combustion efficiency. At the same time, contamination of the heat-transfer surface must be prevented and effective heat recovery must be achieved.

[2] The size of the boiler should be made compact with respect to the amount of boiler evaporation, and the cost should be reduced, and the arrangement should be made freely on board.

[3] By optimizing the flow of gas in the boiler, it is necessary to effectively utilize the contact heat transfer area to maximize the efficiency of the boiler and to make the boiler compact.

[4] Corresponding to the coarsening of the fuel, the boiler combustion chamber should be easily repaired (a structure that allows entry and exit by a manhole).

[5] Since the hull vibration and the propeller excitation vibrations are changed according to the change of the ship type, the main type, and the number of propeller blades, the structure should be able to cope with these excitation vibrations.

[6] In order to be free to select the arrangement of air ducts and exhaust ducts, there should be no restrictions on the connection with ducts in ships.

However, conventional boilers do not satisfy all the above items.

In view of these circumstances, an object of the present invention is to provide a novel boiler that satisfies all items required for a marine auxiliary boiler and also meets the demands of the consumer.

In order to achieve this object, the boiler of the present invention erects the combustion chamber composed of the annular water cooling wall so as to approach one of them in the cylinder, and accesses the annular water cooling wall for gas passage to the cylinder inner wall. In addition, the tank is connected to the access portion of the combustion chamber, which is located near the inside of the cylinder, and is installed. The evaporation tube group and the heating precipitation pipe group are coaxial in the space portion surrounded by the annular water cooling wall for the gas passage and the combustion chamber. The gas compartment plate is installed in the evaporation tube group and partitioned by the upper and lower abdominal means so that each end is connected up and down at the part of the heating precipitation pipe group, and the other end of the gas passage is connected to the gas outlet. It is characterized in that.

Hereinafter, with reference to the embodiment showing the present invention will be described in detail.

In addition, the same code | symbol is used for the component common to the conventional boiler.

3 is a front view of a marine auxiliary boiler according to the present invention, and FIG. 4 is a plan view thereof.

In FIG. 3, the marine auxiliary boiler is a standing cylindrical shape having an eccentric donut-shaped steam chamber 1 at the upper side and a cylindrical water chamber 2 at the lower side, and a boiler cylinder between the steam chamber 1 and the water chamber 2 ( In a), the combustion chamber 3 which consists of a water cooling wall, and the water cooling wall 5 which forms the group of the evaporation tube 4, and a gas path are cooked and comprised. (6) is burner and (7) is manhole.

The burner 6 is equipped with the ceiling part of the said combustion chamber 3, The diameter and length of this combustion chamber 3 are made into the dimension with sufficient margin with respect to a burner flame dimension. Moreover, as shown in FIG. 4, this combustion chamber 3 is arrange | positioned so that it may be eccentric to one side in the said cylinder a, and it can easily enter into this combustion chamber 3 from the outside via the manhole 7. It is structured to let in and out.

As shown in FIG. 4, the water-cooled wall 5 forming the gas passage approaches the inner wall of the cylinder a and at the same time the combustion chamber 3 is approaching one side of the cylinder a. Is connected to the access part of the).

In the portion enclosed by the water cooling wall 5 and the combustion chamber 3, the group of evaporation tubes 4 is arranged in the same direction as the axial direction, and further, the water cooling wall 5 and the combustion chamber 3 are provided. On one side of the enclosed portion, as shown in FIG. 4, the heating precipitation pipe 9 group is also arranged in the same direction as the axial direction.

In the middle of the group of evaporation tubes 4, as shown in FIG. 3, a gas compartment plate 8 is installed, and the gas compartment plate 8 is divided into two parts above and below. To form. As shown in FIG. 4, this gas compartment plate 8 partitions only the evaporation tube 4 group up and down, and the said heating precipitation pipe 9 group does not partition up and down.

Thus, the lower swing passage 12 is in contact with the upper swing passage 13 in the heating precipitation pipe 9 group portion. As shown in FIG. 4 (b), the lower pivot passage 12 communicates with the combustion chamber 3 via the screen tube 10, and the upper pivot passage 13 is the fourth (a). As shown in the figure, the gas outlet 911 is contacted via the screen tube 14.

As described above, the heating and precipitation pipe 9 is installed at the place where the gas flows from the lower part to the upper part, that is, the gas compartment plate 8 partitions the evaporation tube 4 group up and down to obtain good circulation performance. At the same time, the heating precipitation pipe diameter is designed to be larger than that of the evaporation tube, so that the natural frequency of the tube is increased so that the heating precipitation pipe 9 group is sufficiently considered to withstand vibration even without a gas compartment plate.

Next, the operation of the boiler configured as described above will be described.

As shown in FIG. 4 (b), the gas completely burned in the combustion chamber 3 first passes through the lower turn passage 12 through the lower screen tube 10, and then the heating precipitation pipe group 9 It flows by turning. Thereafter, as shown in FIG. 4 (a), the gas is softly raised in the heating precipitation pipe 9, enters the upper turning flow passage 13, and turns again, and the gas discharge port 11 passes through the screen tube 14. In this way, a two-stage swing flow is formed.

In addition, by considering the gas outlet from the combustion chamber 3, the gas outlet 11 can be freely changed, so that the relationship between the boiler arrangement and the stack in the ship can be freely arranged (see FIG. 5), that is, 5 shows three modifications of the arrangement of gas outlets, in which the diagonal lines indicate gas compartment plates, the dashed arrows indicate the downward gas flow of the partition plate, and the solid arrows indicate solid arrows. Denotes the gas swirl flow above the partition plate. 5-1 and 5-3 show a single flow, while in FIG. 5-2, the gas from the combustion chamber 3 is divided into two streams to form a group of heating precipitation pipes 9 in two places. To join the exhaust gas outlet.

The boiler of this invention is comprised as mentioned above, and produces the following effects.

[1] By arranging the combustion chamber, the evaporation tube group, and the heating precipitation pipe group functionally in the same cylinder, a simple and compact boiler structure can be obtained.

[2] By arranging the combustion chamber at an outer position in the cylinder, the combustion chamber can be easily inserted into the combustion chamber through the manhole, and the maintenance of the combustion chamber can be simplified when coarse oil is burned.

[3] By making the gas flow a two-stage swing flow, the contact heat transfer surface can be effectively utilized to the maximum, and a highly efficient compact boiler can be designed.

[4] Equipped with a gas compartment plate, it is also a means for dust protection of the evaporation tube group.

[5] The connection of the combustion air duct for the burner and the exhaust gas can be freely changed.

[6] Since the combustion chamber is arranged in the height direction of the boiler, the combustion chamber can be designed sufficiently large with respect to the burner flame dimensions, and the burner can be burned out completely.

[7] Since the boiler and the gas passage are water-cooled walls and the steam chamber and the water chamber are strut structures, the internal pressure portion can determine the dimensions by simple strength calculation, thereby making it easy to change the design pressure. Can be.

Although an embodiment of the present invention has been described with respect to a ship auxiliary boiler, the present invention is not limited to the above embodiment, and the gas flow is formed in multiple stages so as to approach the one side by eccentrically burning the combustion chamber in the cylinder. It goes without saying that the flow can be modified as appropriate without departing from the scope of the invention.

Claims (1)

In the oil boiler, a combustion chamber composed of an annular water cooling wall is eccentrically installed so as to approach one side of the cylinder, and an annular water cooling wall for gas passage is approached to open the cylinder inner wall, and one side of the cylinder is located. The evaporation tube group and the heating precipitation pipe group are arranged in a coaxial direction, and the evaporation tube group is installed in the cantilever portion surrounded by the annular cooling wall for the gas passage and the combustion chamber. The gas compartment plate which divides it into upper and lower multiple stages is installed, and the upper and lower multiple stage gas path which connects each stage up and down at the part of the said heating precipitation pipe group is formed, and the upper or lower stage of the gas passage is connected to the said combustion chamber. Boilers characterized by contacting the gas outlet with the other end of the gas passage connected to the gas outlet.

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