CN203240561U

CN203240561U - Fuel oil, fuel gas and steam hot-water boiler

Info

Publication number: CN203240561U
Application number: CN 201320199268
Authority: CN
Inventors: 周晓东; 徐建阳; 陈弘
Original assignee: SHANGHAI YUNNENG ENERGY TECHNOLOGY Co Ltd
Current assignee: Shanghai Industrial boiler Co., Ltd
Priority date: 2013-04-19
Filing date: 2013-04-19
Publication date: 2013-10-16
Anticipated expiration: 2023-04-19

Abstract

The utility model discloses a fuel oil, fuel gas and steam hot-water boiler. A first return boiler furnace, a second return fume pipe and a third return fume pipe are in head-to-tail connection with one another in an S shape and parallelly arranged in the boiler from bottom to top, and the first return boiler furnace is communicated with the second return fume pipe through an outer wet-back device. The outer wet-back device comprises a fume chamber which is defined by an outer wet-back pipe board, side wet-back boards and inner wet-back boards in an enclosed mode, wherein the outer wet-back pipe board is located in the front of the fume chamber, the side wet-back boards are located on the two side faces and the lower face of the fume chamber, the inner wet-back boards are located behind and above the fume chamber, the outer layer of each inner wet-back board is provided with an outer wet-back board, a cavity is defined by the outer wet-back boards and a shell of the boiler in an enclosed mode, the cavity contains the fume chamber, the inner space of the fume chamber is communicated with the first return boiler furnace and the second return fume pipe of the boiler, and space, outside the fume chamber, in the cavity is filled with water to be heated. The fuel oil, fuel gas and steam hot-water boiler reduces fuel consumption, improves thermal efficiency, lowers operation cost, and greatly prolongs service life.

Description

The fuel-firing gas-firing steam water boiler

Technical field

The utility model also relates to a kind of boiler, especially a kind of external wet back type fuel-firing gas-firing steam water boiler.

Background technology

Existing fuel-firing gas-firing steam water boiler adopts pan shell type three stroke wet-back structures usually, and flue Central Symmetry or arranged off-centre all can.Fuel pressurized firing in the first backhaul flue, high-temperature flue gas enter the 3rd backhaul smoke pipe along flue to the second backhaul smoke pipe of flowing through of turning back by the wetting back-type return combustion chamber through 180 ° of compression type front smoke chamber turnovers, finally discharge through the exhaust opening in the rear smoke chamber.

Existing a kind of fuel-firing gas-firing steam water boiler as depicted in figs. 1 and 2, comprising the first backhaul flue 1, the second backhaul smoke pipe 2 and the 3rd backhaul smoke pipe 3, described the first backhaul flue 1 be connected backhaul smoke pipe 2 and connect by little smoke-box 4.This fuel-firing gas-firing steam water boiler radiation heating-surface to excessive section of convection heating surface all adopts little smoke-box (the interior wet back of the body) structure, its structural design must form blushed flame (fuel oil) radiation heating-surface deficiency and blue flame (combustion gas) radiation flue curtailment, and what bring is exactly that flue gas temperature of hearth outlet is higher.When flue gas temperature of hearth outlet is higher, or increase convection heating surface, like this can be so that the steel quantity consumption increase; The boiler body exhaust gas temperature is higher, and the boiler thermal output that so just is reduces.Simultaneously can cause the flue gas circulating resistance larger because of above-mentioned reason and tube sheet with smoke pipe employing Type of Welding.

Existing another kind of fuel-firing gas-firing steam water boiler such as publication number are that the Chinese utility model patent of CN2292245Y is disclosed, and it has adopted a kind of exogenous damp back structure with water-cooling wall, so that flue gas smoke box after water-cooling wall is cooled to protect.But this complicated structure, and need to take larger volume.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of fuel-firing gas-firing steam water boiler, so that fuel-firing gas-firing steam and hot water pot furnace structure is simpler, is convenient to processing and safeguards, and improve the efficient of fuel-firing gas-firing steam water boiler.

For solving the problems of the technologies described above, the technical scheme of the utility model fuel-firing gas-firing steam water boiler is, in boiler, be arranged with from top to bottom the first backhaul flue that head and the tail S shape connects in parallel, the second backhaul smoke pipe and the 3rd backhaul smoke pipe, described the first backhaul flue is communicated with by exogenous damp back of the body device with the second backhaul smoke pipe, described exogenous damp back of the body device comprises smoke-box, described smoke-box is by the exogenous damp penstock plate that is positioned at the smoke-box front, be positioned at the wet backboard of two sides of smoke-box and following side and be positioned at the smoke-box back and top wet backboard surrounds and forms, described interior wet backboard skin also is provided with the exogenous damp backboard, the housing of described exogenous damp backboard and boiler is surrounded as a chamber, hold smoke-box in the described chamber, described smoke-box inner space is connected with the first backhaul flue and the second backhaul smoke pipe of boiler, and the outer cavity space of described smoke-box is filled by water to be heated in the boiler.

The utility model has reduced Fuel Consumption and has improved boiler thermal output by adopting above-mentioned exogenous damp back structure, has reduced operating cost.The exogenous damp back structure can avoid flame directly to wash away heating surface in addition, and this structure is separated interior wet backboard and exogenous damp backboard simultaneously, makes the boiler back tube sheet can not produce the steel plate fatigue rupture that thermal (temperature difference) stress causes when operation, greatly improves boiler life.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is the elevation cross-sectional view of existing a kind of fuel-firing gas-firing steam water boiler;

Fig. 2 is the side cutaway view of fuel-firing gas-firing steam water boiler shown in Figure 1;

Fig. 3 is the elevation cross-sectional view of the utility model fuel-firing gas-firing steam water boiler;

Fig. 4 is the side cutaway view of the utility model fuel-firing gas-firing steam water boiler.

Reference numeral is among the figure, 1. the first backhaul flue; 2. the second backhaul smoke pipe; 3. the 3rd backhaul smoke pipe; 4. little smoke box; 5. smoke-box; 6. exogenous damp penstock plate; 7. the wet backboard of side; 8. interior wet backboard; 9. exogenous damp backboard; 10. joint pin.

The specific embodiment

The utility model discloses a kind of fuel-firing gas-firing steam water boiler, as shown in Figure 3 and Figure 4, in boiler, be arranged with from top to bottom the first backhaul flue 1 that head and the tail S shape connects in parallel, the second backhaul smoke pipe 2 and the 3rd backhaul smoke pipe 3, described the first backhaul flue 1 is communicated with by exogenous damp back of the body device with the second backhaul smoke pipe 2, described exogenous damp back of the body device comprises smoke-box 5, described smoke-box 5 is by the exogenous damp penstock plate 6 that is positioned at the smoke-box front, be positioned at the wet backboard 7 of two sides of smoke-box and following side and be positioned at the smoke-box back and top wet backboard 8 surrounds and forms, described interior wet backboard 8 skins also are provided with exogenous damp backboard 9, described exogenous damp backboard 9 is surrounded as a chamber with the housing of boiler, hold smoke-box 5 in the described chamber, described smoke-box inner space is connected with the first backhaul flue and the second backhaul smoke pipe of boiler, and the outer cavity space of described smoke-box is filled by water to be heated in the boiler.

As shown in Figure 4, described smoke-box 5 bottoms are the arc corresponding with the boiler shell shape.

As shown in Figure 3, the upper side section of described interior wet backboard 8 and exogenous damp backboard 9 is arc.

In conjunction with Fig. 3 and shown in Figure 4, the wet backboard 7 of described side and interior wet backboard 8 are connected with boiler shell and exogenous damp backboard 9 by joint pin 10, thereby described smoke-box 5 is fixing in chamber.

Described the second backhaul smoke pipe 2 is arranged on the top of described the first backhaul flue 1 or on every side, perhaps the top is with on every side.

The utility model adopts the exogenous damp back of the body device of above-mentioned fuel-firing gas-firing steam water boiler, so that in the constant situation of boiler overall volume, the first backhaul flue can take longer space, so that fuel burns more fully, and the flue gas of burning in the exogenous damp of described fuel-firing gas-firing steam water boiler back of the body device with the abundant heat exchange of water to be heated, thereby improve the efficient of fuel-firing gas-firing steam water boiler.

The utility model provides the fuel-firing gas-firing steam water boiler, in the situation that the boiler total length is identical, because exogenous damp back of the body apparatus structure is very compact, therefore so that the length of flue can lengthen, not only increased radiation heating-surface, being conducive to the length of flame launches, for the abundant after-flame of fuel provides condition, and make 30-50 ℃ of the second backhaul input gas temperature relative reduce, combine with the wet back of the body and exogenous damp back structure in the arc, further reduce the flue gas backhaul resistance 5-10 millimeter of water, thereby reduced Fuel Consumption, improved boiler thermal output, also brought thus the burner fan efficiency to improve and the increase of burner type selecting face, need the power of fan of coupling to reduce, reduced operating cost.The exogenous damp back structure that lengthens in addition can avoid flame directly to wash away heating surface, and this structure is separated interior wet backboard and exogenous damp backboard simultaneously, makes the boiler back tube sheet can not produce the steel plate fatigue rupture that thermal (temperature difference) stress causes when operation, greatly improves boiler life.

Claims

1. fuel-firing gas-firing steam water boiler, in boiler, be arranged with from top to bottom the first backhaul flue that head and the tail S shape connects in parallel, the second backhaul smoke pipe and the 3rd backhaul smoke pipe, it is characterized in that, described the first backhaul flue is communicated with by exogenous damp back of the body device with the second backhaul smoke pipe, described exogenous damp back of the body device comprises smoke-box, described smoke-box is by the exogenous damp penstock plate that is positioned at the smoke-box front, be positioned at the wet backboard of two sides of smoke-box and following side and be positioned at the smoke-box back and top wet backboard surrounds and forms, described interior wet backboard skin also is provided with the exogenous damp backboard, the housing of described exogenous damp backboard and boiler is surrounded as a chamber, hold smoke-box in the described chamber, described smoke-box inner space is connected with the first backhaul flue and the second backhaul smoke pipe of boiler, and the outer cavity space of described smoke-box is filled by water to be heated in the boiler.

2. fuel-firing gas-firing steam water boiler according to claim 1 is characterized in that, described smoke-box bottom is the arc corresponding with the boiler shell shape.

3. fuel-firing gas-firing steam water boiler according to claim 1 is characterized in that, the upper side section of described interior wet backboard and exogenous damp backboard is arc.

4. fuel-firing gas-firing steam water boiler according to claim 1 is characterized in that, the wet backboard of described side and interior wet backboard are connected with boiler shell and exogenous damp backboard by joint pin, thereby described smoke-box is fixing in chamber.

5. fuel-firing gas-firing steam water boiler according to claim 1 is characterized in that, described the second backhaul smoke pipe is arranged on the top of described the first backhaul flue.

6. fuel-firing gas-firing steam water boiler according to claim 1 is characterized in that, described the second backhaul smoke pipe be arranged on described the first backhaul flue around.

7. fuel-firing gas-firing steam water boiler according to claim 1 is characterized in that, described the second backhaul smoke pipe be arranged on simultaneously described the first backhaul flue around and the top.