CN200986212Y - Horizontal type Steam boiler of combined water-tube type and fire-tube type with gray falling hole in face arch - Google Patents

Abstract

The utility model relates to a horizontal fire tube shell boiler with ash removing holes on front and rear arches. Top of the foresaid boiler is provided with the shell which is connected with a down pipe, and the down pipe is connected respectively with a front collecting case, a rear collecting case and a lateral collecting case. The front collecting case is connected with a front arch, a front shed tube and inserted into the shell. The rear collecting case is connected with a rear arch and positioned inside the shell as well. The lateral collecting case is connected with a lateral water cooling wall, and tubes of the lateral water cooling wall is arranged inside the shell interlacedly. The shell is arranged outside hearth. Characteristically, a fireproof plate wrapped by fireproof cement is arranged on the front arch, and the fireproof plate is provided with a plurality of ash removing holes. The utility model increases the rear arch so as to improve height of the hearth and promote burning effect as well as thermal efficiency while former height of the boiler is not changed. The lateral water cooling wall is arranged inside the shell interlacedly, and the shell is arranged outside hearth in order to prevent the shell contacting directing flame ands high temperature smoke, which overcomes disadvantage of shell swell, improves heat transmission effect and service life of the boiler. The internal smoke chamber overcomes the deficiency including fall off of heat preserving layer and air leakage. The front arch and the rear arch are provided with ash removing holes in order to simplify ash cleanness and reduce pause of the boiler.

Description

The horizontal water fire tube shell boiler of face arch band ash-falling hole

Affiliated field: the utility model relates to a kind of horizontal water fire tube shell boiler of face arch band ash-falling hole.

Background technology: horizontal water fire tube shell boiler, its structure all adopts single shell both sides to arrange that water screen tube constitutes burner hearth and secondary furnace heating surface, smoke pipe is set in the shell, and fuel at first carries out radiation heat transfer with shell and water-cooling wall at burn on the fire grate flame that produced and high-temperature flue gas in burner hearth, enter shell smoke pipe, economizer, deduster through aerofoil profile flue, front smoke box enters flue gas in the atmosphere by chimney with air inducing.Above-mentioned boiler overall structure and corresponding heat exchange mode thereof, feasible existing smaller hard flour pancake boiler are for the big boiler of unit interval evaporation capacity, mainly have following several respects problem: 1 furnace height is little, burn insufficient, unburned carbon in flue dust is high, the thermal efficiency is low, smoke pipe wearing and tearing are big.2 above-mentioned boiler heat exchange modes, burner hearth high-temperature flue gas directly act on the shell bottom, boiler bottom very easily deposits a large amount of incrustation scales, makes the shell bottom high-temerature creep phenomenon take place, cause the distortion bulge in addition, influences boiler heat-transfer effect and service life.The easy scaling loss distortion of 3 steel front smoke boxs causes leaks out, safeguards inconvenience.4 front smoke boxs do not have ash-falling hole, deashing inconvenience.

Summary of the invention: the purpose of this utility model provides a kind of deashing horizontal water fire tube shell boiler of face arch band ash-falling hole easily.The purpose of this utility model realizes by following structure: the utility model is a kind of horizontal water fire tube shell boiler of face arch band ash-falling hole, top is shell, shell connects down-comer, collection case, rear set box, side collection case before down-comer connects respectively, preceding collection case is connected with face arch, preceding canopy pipe, enters shell; Rear set box is connected with rear arch, enters shell; Side collection case is connected with side wall, side water wall tube cross-entry shell; Shell places the burner hearth outside, and face arch has refractory cement parcel water pipe to form refractory slab, has a plurality of ash-falling holes on the plate body.The utility model is in a disguised form set up rear arch under the situation of original height inconvenience, improve furnace height, and combustion efficiency is good, thermal efficiency height.Side water wall tube cross-entry shell places shell outside the burner hearth, and it is not directly contacted with flame and high-temperature flue gas, has fundamentally solved the disadvantage of shell bulge.Improve heat-transfer effect and service life.Built-in smoke-box has overcome the disadvantage that heat-insulation layer easily comes off and leaks out.The front and back arch adds ash-falling hole, and deashing is convenient, reduces the blowing out number of times.Rear arched tube is divided into three sections to burner hearth in 1 burner hearth, and the flue gas trend is horizontal S type, the prolong smoke time of staying, the abundant after-flame of combustible, simultaneously inertial separation produces centrifugal force and makes that soot particle falls into the rear arch ash-falling hole in action of centrifugal force in the flue gas, discharges from scum hole, alleviates the smoke pipe wearing and tearing.Combustion efficiency is good.Thermal efficiency height.2 side water wall tube cross-entry shells place shell outside the burner hearth, and it is not directly contacted with flame and high-temperature flue gas, have fundamentally solved the disadvantage of shell bulge.3 shell front portions are formed built-in smoke-box by preceding canopy pipe and face arch and are replaced traditional steel front smoke box, thereby have overcome the disadvantage that heat-insulation layer easily comes off and leaks out.4 front and back arch adds ash-falling hole, and deashing is convenient, reduces the blowing out number of times.

Description of drawings:

Fig. 1 is the utility model overall structure cutaway view

Fig. 2 looks cutaway view for the left side of Fig. 1

The specific embodiment:

The utility model as shown in Figure 1 is a kind of horizontal water fire tube shell boiler of face arch band ash-falling hole, top is shell 6, and shell 6 connects down-comer, collection case 10, rear set box 13, side collection case 14 before down-comer connects respectively, preceding collection case 10 is connected with face arch 9, preceding canopy pipe 7, enters shell 6; Rear set box 13 is connected with rear arch, enters shell; As shown in Figure 2, side collection case 14 is connected with side wall, side water wall tube 5 cross-entry shells 6; Shell places burner hearth 1 outside, and face arch 9 has refractory cement parcel water pipe to form refractory slab, has a plurality of ash-falling holes on the plate body, ash-falling hole 11 and back ash-falling hole 12 before being divided into.

As shown in Figure 1, built-in smoke-box 8 is formed by preceding canopy pipe 7 and face arch 9 in the shell front portion, and face arch has refractory cement parcel water pipe to form fire-resistant flaggy, has a plurality of ash-falling holes on the plate body.

Rear arched tube is divided into three sections to burner hearth in the burner hearth, form a wall 2 by refractory cement parcel water pipe in the burner hearth, wall 2 is positioned on the last rear arch 3 at burner hearth middle part, and wall has burning gallery with following rear arch 4, side water wall tube 5 cross-entry shells 6, shell 6 places burner hearth 1 outside.

As shown in Figure 2, the built-in threaded flue 15 of water jacket, threaded flue 15 connects exhanst gas outlet.Top is that shell 6 connects down-comer 16, collection case 10, rear set box 13, side collection case 14 before down-comer 16 connects respectively, and preceding collection case 11 is connected with face arch 9, preceding canopy pipe 7, enters shell 6; Rear set box 13 is connected with last rear arch 3, following rear arch 4, enters shell 6.

Claims (3)

1, a kind of horizontal water fire tube shell boiler of face arch band ash-falling hole, top is shell, shell connects down-comer, collection case, rear set box, side collection case before down-comer connects respectively, preceding collection case is connected with face arch, preceding canopy pipe, enters shell; Rear set box is connected with rear arch, enters shell; Side collection case is connected with side wall, side water wall tube cross-entry shell; Shell places the burner hearth outside, it is characterized in that: face arch has refractory cement parcel water pipe to form refractory slab, has a plurality of ash-falling holes on the plate body.

2, the horizontal water fire tube shell boiler of a kind of face arch band ash-falling hole according to claim 1 is characterized in that: built-in smoke-box is formed by preceding canopy pipe and face arch in the shell front portion.

3, the horizontal water fire tube shell boiler of a kind of face arch band ash-falling hole according to claim 1, it is characterized in that: rear arched tube is divided into three sections to burner hearth in the burner hearth, form a wall by refractory cement parcel water pipe in the burner hearth, wall is positioned on the last rear arch at burner hearth middle part, wall has burning gallery, side water wall tube cross-entry shell with following rear arch.

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