CN2382952Y

CN2382952Y - Vertical internal combustion wet back type fire-tube coal burning boiler

Info

Publication number: CN2382952Y
Application number: CN 99219033
Authority: CN
Inventors: 郑向阳; 谢正霞; 徐翔
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-10
Filing date: 1999-08-10
Publication date: 2000-06-14
Anticipated expiration: 2009-08-10

Abstract

The utility model relates to a vertical internal combustion wet back type fire-tube coal burning boiler. The utility model has the structural characteristics that the upper part of a boiler liner is (1-4) is provided with a fume turning chamber (1-2) or a bent smoke pipe; a smoke pipe (1-3) is arranged between a lower tube plate of the fume turning chamber (1-2) and the lower tube plate of the boiler or the bent smoke pipe is connected with the lower tube plate of the boiler; the bottom part of the boiler is provided with a fume collecting chamber (1-6) and a wind chamber; the fume collecting chamber and the wind chamber are connected by a steel pipe to form an annular air preheater (1-7), and the volume of the air preheater (1-7) can be large and less so that the boiler can be easily made, wherein, the volume of the boiler is less than 0.5t/h. The utility model has the advantages of small ground occupation, low steel consumption, small thermal inertia, and convenient maintenance.

Description

Vertical internal combustion wetting back-type fire tube coal-burning boiler

The utility model belongs to the Industrial Boiler Technology field, refers in particular to the vertical fire coal boiler.

In the prior art, the vertical fire coal boiler is by formations such as cock orchid (horizontal smoke pipe), big horizontal water tube, vertical curved water pipe, vertical counter-burning fire grates, and convection heating surface is arranged in the flue top.Owing to highly be restricted, vertical boiler can not be to big capacity development, and and there is the problem of inconvenient maintenance in capacity generally below 0.5t/h.And horizontal external combustion extreme misery pipe coal-burning boiler, shortcoming such as though can be made into the boiler of larger capacity, floor space is big, exists on " burning belly ", is prone to shell drum blister, and thick and heavy furnace wall, chimney arch are arranged, and thermal inertia is very big, starts inconvenience, and steel quantity consumption is big.

In order to address the above problem, as " the vertical fire tube boiler of annular header " (ZL91207704, stop), " U " type, the flue tube structure of former vertical shell boiler are removed, change the fire box that forms by annular header and the water screen tube of arranging on it into, as radiation heating-surface, it can save great deal of steel, but capacity also is difficult to improve." a kind of vertical fire tube boiler " (ZL97213947) and " vertical fire tube boiler " (ZL97248973) wait advantage respectively arranged, but also be difficult to the suitable boiler of making larger capacity.

The purpose of this utility model is to provide a kind of vertical internal combustion wetting back-type fire tube coal-burning boiler, and its capacity is changeable easily, and floor space is little, and steel quantity consumption is low, and thermal inertia is little, and is easy to maintenance.

For achieving the above object, the solution that the utility model is taked is: a kind of vertical internal combustion wetting back-type fire tube coal-burning boiler, comprise shell, flue, fire grate, smoke pipe, vertical layout, the combustion space is a flue, flue top is provided with a gas reversal chamber or curved smoke pipe, install smoke pipe between gas reversal chamber lower perforated plate and the boiler lower perforated plate, perhaps curved smoke pipe links to each other with the boiler lower perforated plate, boiler bottom is provided with flue gas and compiles chamber and air compartment, and flue gas compiles between chamber and the air compartment to link to each other by steel pipe and forms the annular air preheater.

Owing to be provided with gas reversal chamber or curved smoke pipe, made things convenient for maintenance, and all be water cooling (wetting back-type), reliable, radiation loss is little; Because no furnace wall and chimney arch, thermal inertia is little; Because convection heating surface is arranged in the flue hoop, when boiler capacity increased, as long as increase smoke pipe row's number and shell diameter, boiler was at an easy rate to big capacity development.

Be further described below in conjunction with embodiment and accompanying drawing thereof beneficial effect the utility model and generation thereof.

Fig. 1 is the schematic diagram of embodiment one.

Fig. 2 is the schematic diagram of embodiment two.

Fig. 3 is the schematic diagram of embodiment three.

As Fig. 1, Fig. 2, shown in Figure 3, a kind of vertical internal combustion wetting back-type fire tube coal-burning boiler comprises shell (1-1,2-1,3-1), flue (1-4,2-4,3-4), fire grate (1-5,2-5,3-5), smoke pipe (1-3,2-3,3-3-1,3-3-2), vertical layout, combustion space are flue (1-4,2-4,3-4), flue (1-4,2-4,3-4) top be provided with a gas reversal chamber (1-2,3-2) or curved smoke pipe (2-3), gas reversal chamber (1-2, (1-3,3-3-1) (as shown in figures 1 and 3), perhaps curved smoke pipe (2-3) linked to each other (as shown in Figure 2) with the boiler lower perforated plate 3-2) to install smoke pipe between lower perforated plate and the boiler lower perforated plate, boiler bottom is provided with flue gas and compiles chamber (1-6,2-6 is 3-6) with air compartment (1-8,2-8,3-8), flue gas compile the chamber (1-6,2-6,3-6) with air compartment (1-8,2-8,3-8) by steel pipe link to each other to form the annular air preheater (1-7,2-7,3-7).

As shown in Figure 3, embodiment three is boilers (wanting big such as the boiler capacity of embodiment shown in Figure 1) of larger capacity, between boiler top and lower perforated plate, also install the second backhaul smoke pipe (3-3-2), it is for the increase capacity that the second backhaul smoke pipe (3-3-2) is set, and is provided with flue gas again at the top of boiler second backhaul smoke pipe (3-3-2) smoke outlet simultaneously and compiles chamber (3-9).

As shown in Figure 2, embodiment two is the boilers (boiler capacity such as embodiment shown in Figure 1 is little) than low capacity, and (1-2's gas reversal chamber 3-2) degenerates, and (3-4) top is provided with curved smoke pipe (2-3) and replaces it for 1-4,2-4 with flue.

No matter be that (1-2,3-2) turn of bilge of still curved smoke pipe (2-3) is water cooling (wetting back-type) to gas reversal chamber, has improved the thermal efficiency.No matter be embodiment one or two or three, flue (3-4) burn and conduct heat for 1-4,2-4 by tall and big relatively helping.According to technology of the present utility model, the capacity of making easily is greater than the boiler more than the 0.5t/h.

Claims

1, a kind of vertical internal combustion wetting back-type fire tube coal-burning boiler comprises shell (1-1,2-1,3-1), flue (1-4,2-4,3-4), fire grate (1-5,2-5,3-5), smoke pipe (1-3,2-3,3-3-1,3-3-2), vertical layout, the combustion space be flue (1-4,2-4,3-4), it is characterized in that: (3-4) top is provided with a gas reversal chamber (1-2 to flue for 1-4,2-4,3-2) or curved smoke pipe (2-3), (1-2 3-2) installs smoke pipe (1-3 between lower perforated plate and the boiler lower perforated plate to gas reversal chamber, 3-3-1), perhaps curved smoke pipe (2-3) links to each other with the boiler lower perforated plate, and boiler bottom is provided with flue gas and compiles chamber (1-6,2-6 is 3-6) with air compartment (1-8,2-8,3-8), flue gas compiles chamber (1-6,2-6,3-6) (1-8,2-8 link to each other to form annular air preheater (1-7 by steel pipe between 3-8) with air compartment, 2-7,3-7).

2, a kind of vertical internal combustion wetting back-type fire tube coal-burning boiler according to claim 1, it is characterized in that: when boiler capacity is big, between boiler top and lower perforated plate, also install the second backhaul smoke pipe (3-3-2), be provided with flue gas again at the top of boiler second backhaul smoke pipe (3-3-2) smoke outlet and compile chamber (3-9).