CN201359370Y

CN201359370Y - Three-pass boiler with long fire tube

Info

Publication number: CN201359370Y
Application number: CNU2008202270912U
Authority: CN
Inventors: 李军
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2009-12-09
Anticipated expiration: 2018-12-11

Abstract

The utility model provides a three-pass boiler with a long fire tube, which comprises a furnace shell. A water inlet and a water outlet are arranged on the furnace shell. An internal furnace is installed in the furnace shell. A heat exchange chamber is arranged between the furnace shell and the internal furnace. A combustion chamber is arranged in the internal furnace. A smoke box is installed at the top of the internal furnace. The lower part of the internal furnace is connected with the lower end of the fire tube. The upper part of the smoke box is connected with the upper end of the fire tube. A chimney is installed in the smoke box. The lower end of the chimney is arranged at the lower part of the smoke box. A water jacket is installed on the outer wall of the chimney. The water jacket is communicated with the heat exchange chamber through a water jacket water inlet pipe and a water jacket water outlet pipe. The utility model has the advantages of reasonable structural design, high heat exchange efficiency, energy saving, smooth smoke channel, fully burned fuel, low flue gas temperature, low pollution, environmental protection, high safety and long service life.

Description

Long fire tube three-pass boiler

Technical field

The utility model relates to a kind of boiler, specifically a kind of long fire tube three-pass boiler.

Background technology

The characteristics that multi-pass boiler is little because of its volume, heat exchange efficiency is high are at present used widely, but people in use find, multi-pass boiler can influence the unobstructed of flue when improving heat exchange efficiency, if and flue is unobstructed inadequately, fuel can't fully burn, and both can influence efficiency of combustion, can discharge the dense smoke contaminated environment again, also may increase furnace pressure, form accident potential.Some product can only reduce the heat exchange area in the stove for fear of the problems referred to above occurring, and the heat in the flue gas can not get abundant absorption like this, can make boiler discharge high-temperature flue gas, same contaminated environment, and waste fuel.Be that each boiler for producing enterprise at first needs the problem that solves how guaranteeing to improve as much as possible under the unobstructed prerequisite of flue heat exchange efficiency.

Summary of the invention

The purpose of this utility model provides a kind of long fire tube three-pass boiler, and it has guaranteed the unobstructed of flue when improving heat exchange efficiency, solved the ubiquitous problems of present multi-pass boiler.

The utility model for achieving the above object, be achieved through the following technical solutions: comprise furnace shell, furnace shell is provided with water inlet and delivery port, the inner flue of installing of furnace shell, between furnace shell and the flue heat exchanging chamber is set, flue inside is the combustion chamber, smoke box is installed at the flue top, the flue bottom is connected with the lower end of fire tube, smoke box top is connected with the upper end of fire tube, and chimney is installed in the smoke box, and the lower end of chimney is positioned at the bottom of smoke box, the outer wall of chimney is installed water jacket, and water jacket communicates with heat exchanging chamber by water jacket water inlet pipe and water jacket outlet pipe.Vertical heat exchanger tube is installed in the smoke box, and vertical heat exchanger tube top all communicates with heat exchanging chamber with the bottom.The bottom taper shape of flue.The smoke box bottom is provided with the dedusting door.Fire grate is installed at the middle part, combustion chamber, and lower fire grating is installed in the bottom, combustion chamber, and upper fire-grating top is upper combustion chamber, and the upper combustion chamber side is provided with upper furnace door, is lower combustion chamber between upper fire-grating and the lower fire grating, and the lower combustion chamber side is provided with lower furnace door.

Advantage of the present utility model is: reasonable in design, and the heat exchange efficiency height is saved the energy, and flue is unobstructed, and fuel combustion is abundant, and the flue-gas temperature of discharge is low, pollution is little, helps environmental protection, and is safe, long service life.

Description of drawings

Fig. 1 is the utility model structural representation; Fig. 2 is the left TV structure schematic diagram of Fig. 1; Fig. 3 is the A-A sectional structure schematic diagram of Fig. 1.

The specific embodiment

Long fire tube three-pass boiler described in the utility model realizes that the structure of goal of the invention is: a furnace shell 1 is arranged, furnace shell 1 is provided with water inlet 3 and delivery port 4, the furnace shell 1 inner flue 2 of installing, between furnace shell 1 and the flue 2 heat exchanging chamber 21 is set, flue 2 inside are the combustion chamber, smoke box 6 is installed at flue 2 tops, flue 2 bottoms are connected with the lower end of fire tube 7, smoke box 6 tops are connected with the upper end of fire tube 7, chimney 9 is installed in the smoke box 6, the lower end of chimney 9 is positioned at the bottom of smoke box 6, and the outer wall of chimney 9 is installed water jacket 10, and water jacket 10 communicates with heat exchanging chamber 21 by water jacket water inlet pipe 11 and water jacket outlet pipe 22.It is the longest that this structural design can make the length of fire tube 7 increase to, and heat exchange area is increased, and improves heat exchange efficiency under the unobstructed prerequisite of flue, and water jacket 10 can fully absorb the heat in the flue gas that chimney 9 is discharged, and reduces smog discharge temperature etc.

The utility model fully absorbs flue gas heat in order further to improve heat exchange efficiency, and the scheme that provides is: on the basis of said structure, vertical heat exchanger tube 8 is installed in smoke box 6, the top of vertical heat exchanger tube 8 all communicates with heat exchanging chamber 21 with the bottom.Vertical heat exchanger tube 8 is evenly distributed in the smoke box 6, and its quantity can be installed 4,6 or 7 and do not waited, and can determine according to the size of boiler.

In order to increase coal capacity of the present utility model, the bottom of flue 2 can be made into taper shape, increase the volume of combustion chamber, play the effect that improves calorific value.

Because boiler uses for a long time, its inside may deposit a part of flue dust, flue dust too much can influence result of use, the utility model tangible position of dust deposition in actual use is smoke box 6 inside, therefore offer dedusting door 18 in smoke box 6 bottoms, be convenient to the flue dust that people sweep deposition in the smoke box 6.

Multiple structure can be adopted in combustion chamber described in the utility model, wherein preferred construction is to install fire grate 12 at the middle part, combustion chamber, lower fire grating 13 is installed in the bottom, combustion chamber, upper fire-grating 12 tops are upper combustion chamber 14, upper combustion chamber 14 sides are provided with upper furnace door 15, be lower combustion chamber 16 between upper fire-grating 12 and the lower fire grating 13, the lower combustion chamber side is provided with lower furnace door 17, this structure can realize goal of the invention of the present utility model, and effect is best, can guarantee full combustion of fuel, almost not have dust in the flue gas of generation.Can certainly adopt other schemes, for example: only in the bottom, combustion chamber fire grate is installed, fire door is installed in the side, combustion chamber, though this scheme is simple in structure, result of use is not good enough.

The utility model is in order further to improve heat exchange efficiency, and the scheme that provides is: flue 2 end faces are made into male and fomale(M﹠F), and wherein convex surface 5 tops are connected with smoke box 6 bottoms.This structure can increase the heat exchange area at flue 2 tops, can guarantee that also the current of recirculated water between vertical heat exchanger tube 8 bottoms and the heat exchanging chamber 21 are unobstructed simultaneously.

The utility model in use, fuel carries out heat exchange at heat that the combustion chamber internal combustion produces by flue 2 and recirculated water in the heat exchanging chamber 21.The high-temperature flue gas that burning produces enters fire tube 7, flue gas along in the process that rises in the fire tube 7 with the recirculated water in a part of heat transferred heat exchanging chamber 21, when flue gas arrives fire tube 7 tops, when entering smoke box 6, vertical heat exchanger tube 8 in the smoke box 6 is washed away, with the recirculated water in the vertical heat exchanger tube 8 of heat transferred, when flue gas arrives smoke box 6 bottoms, when entering chimney 9, the recirculated water in the water jacket 10 around the chimney 9 can absorb flue gas rest parts heat again.Flue gas through discharging after three backhauls, can play the effect of abundant heat exchange in boiler, and final flue-gas temperature of discharging is lower, can significantly reduce environmental pollution.19 is furnace bottoms among the figure, the 20th, and shoot door.

The content that the utility model does not describe in detail is known technology.

Claims

1, long fire tube three-pass boiler, comprise furnace shell (1), furnace shell (1) is provided with water inlet (3) and delivery port (4), the inner flue (2) of installing of furnace shell (1), between furnace shell (1) and the flue (2) heat exchanging chamber (21) is set, flue (2) inside is the combustion chamber, it is characterized in that: smoke box (6) is installed at flue (2) top, flue (2) bottom is connected with the lower end of fire tube (7), smoke box (6) top is connected with the upper end of fire tube (7), chimney (9) is installed in the smoke box (6), the lower end of chimney (9) is positioned at the bottom of smoke box (6), the outer wall of chimney (9) is installed water jacket (10), and water jacket (10) communicates with heat exchanging chamber (21) by water jacket water inlet pipe (11) and water jacket outlet pipe (22).

2, long fire tube three-pass boiler according to claim 1 is characterized in that: vertical heat exchanger tube (8) is installed in the smoke box (6), and vertical heat exchanger tube (8) top all communicates with heat exchanging chamber (21) with the bottom.

3, long fire tube three-pass boiler according to claim 1 is characterized in that: the bottom taper shape of flue (2).

4, according to claim 1,2 or 3 each described long fire tube three-pass boilers, it is characterized in that: smoke box (6) bottom is provided with dedusting door (18).

5, long fire tube three-pass boiler according to claim 4, it is characterized in that: fire grate (12) is installed at the middle part, combustion chamber, lower fire grating (13) is installed in the bottom, combustion chamber, upper fire-grating (12) top is upper combustion chamber (14), upper combustion chamber (14) side is provided with upper furnace door (15), be lower combustion chamber (16) between upper fire-grating (12) and the lower fire grating (13), the lower combustion chamber side is provided with lower furnace door (17).

6, according to claim 1 or 3 described long fire tube three-pass boilers, it is characterized in that: flue (2) end face is a male and fomale(M﹠F), and convex surface (5) top is connected with smoke box (6) bottom.