CN2286278Y

CN2286278Y - Single-drum vertical bypass flue rear-inclined reciprocating grate combustion coal boiler

Info

Publication number: CN2286278Y
Application number: CN 97215166
Authority: CN
Inventors: 李树峰; 秦昭起; 张文斌; 屈良柱
Original assignee: WENJIAO BOILER FACTORY CHANGCHUN CITY
Current assignee: WENJIAO BOILER FACTORY CHANGCHUN CITY
Priority date: 1997-04-29
Filing date: 1997-04-29
Publication date: 1998-07-15
Anticipated expiration: 2007-04-29

Abstract

The utility model discloses a single-drum vertical boiler with a bypass flue and a rear-inclined reciprocating grate. A-shaped coal forming machine is arranged in front of a furnace, a rear-inclined reciprocating grate is arranged at the lower part of a hearth, a front arch which is short and high and a rear arch which is low and long are arranged in the hearth, a drum is arranged at the top part of the drum, and a threaded smoke tube which is arranged in the drum is connected with arch bars which are arranged at both ends of the drum; a partition wall is arranged on the left side of the hearth, and a bypass flue is formed by the partition wall and a back wall, so that smoke gas can enter a bypass flue scouring convection bank from a turning smoke tube which is arranged at the back part of the hearth, and the smoke gas which flows through a front smoke box and the smoke tube can be exhausted from the tail part. The structure can guarantee that the combustion can be violent and stable, the heat exchange can be complete, the pollution can be reduced, and the efficiency can be improved; the connected points between the smoke tube and the arch bars are avoided from the scouring of high-temperature smoke gas, so that the structure is perfect and reasonable.

Description

Single drum longitudinal by-pass flue rear-inclined reciprocal grate combustion coal boiler

The utility model relates to a kind of Industrial Boiler, particularly relates to a kind of single drum longitudinal by-pass flue rear-inclined reciprocal grate combustion coal boiler.

The single drum-type boiler that has moved at present adopts accurate rigidity structures such as flat head and light pipe, and the high-temperature flue gas of furnace outlet directly washes away tube sheet, so tube sheet very easily splits, no convection bank makes boiler easily produce subcooled boiling, the easy bulge of boiler drum bottom influences boiler safety.Use diffusing coal, adopt straight up and down air intake reciprocal grate again, so its coal leakage quantity is big, dust emission is big, increases the smoke evacuation dustiness, influences boiler efficiency, again contaminated environment.

At above-mentioned situation, the purpose of this utility model is to provide a kind of so single drum longitudinal by-pass flue rear-inclined reciprocating furnace combustion coal boiler, the high-temperature flue gas that it has avoided burner hearth to produce directly washes away the arch tube sheet, cause tube sheet cracking, make full use of convection bank and the internal thread smoke pipe carries out heat exchange, improved the efficient of boiler, the burning of employing moulded coal, reduce and leak coal, lowered dust exhausting concentration, improved environmental pollution.

For achieving the above object, the utility model has been taked following technical measures.

The moulded coal forming machine is equipped with at the coal bunker place of stokehold, the coal that will loose is processed into moulded coal, lower furnace portion is equipped with the reciprocal grate that the rear-inclined fire grate segment is formed, burner hearth is equipped with short and high face arch and low and long rear arch, the burner hearth both sides are furnished with water screen tube, the top of water screen tube connects with the upper drum bottom, the bottom is attached to a left side respectively, the top of right side header, tapped smoke pipe is loaded in it along drum length, and the front end of drum is equipped with front smoke box, and the back smoke box is equipped with in the rear end, back smoke box and afterbody link, partition wall is equipped with in the burner hearth left side, and left side furnace wall and partition wall are constituted by-pass flue, makes the turning channel of hot flue gas through leaving between partition wall and the back wall of furnace outlet, again through by-pass flue, wash away the front smoke box of flowing through successively after the convection bank, smoke pipe, back smoke box to afterbody flows out.

The major advantage of this structure:

1, the moulded coal forming machine is equipped with in the stokehold, and the coal that will loose is processed into microscler or ellipse garden shape moulded coal, makes the volume size rule of fuel, and porosity is little, and is even for the fire grate air-distribution, reduces incomplete combustion loss, improves environmental pollution.

2, the reciprocal grate that adopts the rear-inclined fire grate segment to form, air feed makes progress backward, and direct inverse mixes both in inner flue gas of the stove, and the disturbance effect takes place, and cooperates with rational face arch, rear arch again, makes in the stove to mix combustion intensification.

3, flue gas is through left back turning of burner hearth, and the convection bank of washing away by-pass flue, heat exchange are after by-pass flue enters front smoke box, and the internal thread smoke pipe of flowing through, back smoke box make heat exchange abundant until back-end surfaces, have reduced exhaust gas temperature, have improved the thermal efficiency.

4, the forward and backward position of internal thread smoke pipe connects with the forward and backward arch bar of drum, has avoided the high-temperature flue gas of burner hearth that this connection place is directly washed away, and has prevented the cracking of tube sheet, makes structure more reasonable.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the front view of the utility model boiler band section;

Fig. 2 is the front view of Fig. 1 band broken section;

Fig. 3 is the vertical view of Fig. 1 band broken section.

As Figure 1-3, moulded coal forming machine 1 is equipped with at the anterior coal bunker place of boiler, and the coal that looses is processed into the moulded coal of microscler or elliptical shape herein, and the reciprocal grate 2 that the rear-inclined fire grate segment is formed is equipped with in burner hearth 4 bottoms, make thereon moulded coal by means of back and forth pushing away the effect of raising, by moving behind the forward direction.Furnace front is equipped with short and high face arch 13, postmedian is equipped with low and long rear arch 3, boiler drum 8 is equipped with at the top of burner hearth, the burner hearth left and right sides all is equipped with water screen tube 14, the top of described water screen tube 14 connects with the bottom of drum 8 and the bottom is coupled to lower-left header 19 and bottom right header 15 respectively, the top of down-comer 16 connects the bottom of drum 8, and the bottom is coupled to the top of bottom right header 15, tapped smoke pipe 11 is loaded in it along the length of drum 8, one end of smoke pipe 11 connects with preceding arch bar 9, and the other end connects with back arch bar 7, the rear portion of front smoke box 10 connects with preceding arch bar 9, the bottom connects with by-pass flue 12 outlets, and the front portion of back smoke box 6 connects with back arch bar 7, and the rear portion connects back-end surfaces 5, partition wall 17 is equipped with in the left side of burner hearth, make left side furnace wall and partition wall 17 constitute by-pass flue 12, leave flue gas turning channel 21 between the wall 20 behind described partition wall 17 and the burner hearth, convection bank 18 is housed in the by-pass flue 12.Hot flue gas in the burner hearth 4, after water screen tube 14 heat exchange, after turning channel 21 flowed to by-pass flue 12 and washes away convection bank 18, the front smoke box 10 of flowing through again, smoke pipe 11, back smoke box 6 were again through back-end surfaces 5 discharges.

Claims

A kind of single drum longitudinal by-pass flue rear-inclined reciprocal grate combustion coal boiler, mainly by burner hearth, fire grate, drum, header and water screen tube are formed, it is characterized in that: moulded coal forming machine (1) is equipped with at the anterior coal bunker of boiler place, the reciprocal grate (2) that the uphill furnace screening is formed is equipped with in the bottom of burner hearth (4), furnace front is equipped with short and high face arch (13), postmedian is equipped with low and long rear arch (3), roof of the furnace is equipped with drum (8), water screen tube (14) is equipped with in the left side, water screen tube top connects with the bottom of drum (8), the bottom connects with the top of lower-left header (19), the top of right side water screen tube connects with the bottom of drum (8), the bottom connects with the top of bottom right header (15), the top of down-comer (16) is connected in the bottom of drum (8), and the bottom is coupled to the top of bottom right header (15), tapped smoke pipe (11) is loaded in it along the length of drum (8), one end connects with preceding arch bar (9), the other end connects with back arch bar (7), the rear portion of front smoke box (10) connects with preceding arch bar (9), the bottom connects with by-pass flue (12) outlet, the front portion of back smoke box (6) connects with back arch bar (7), the rear portion connects back-end surfaces (5), partition wall (17) is equipped with in the left side of burner hearth, make left side furnace wall and partition wall (17) constitute by-pass flue (12), leave flue gas turning channel (21) behind described partition wall (17) and the burner hearth between the wall (20), convection bank (18) is housed in the by-pass flue (12).