CN201242147Y

CN201242147Y - Square briquette boiler

Info

Publication number: CN201242147Y
Application number: CNU2008200770938U
Authority: CN
Inventors: 高靖宇; 程芳琴; 杨凤玲; 高利生
Original assignee: TIANYU ENVIRONMENT-PROTECTION TECHNOLOGY Co Ltd SHANXI
Current assignee: TIANYU ENVIRONMENT-PROTECTION TECHNOLOGY Co Ltd SHANXI
Priority date: 2008-04-25
Filing date: 2008-04-25
Publication date: 2009-05-20
Anticipated expiration: 2018-04-25

Abstract

The utility model discloses a square molded coal boiler, which comprises a fire grate, a coal inlet, a coal pushing device and a front furnace arc, wherein the fire grate is a flat-shaped fixed fire grate which is made of fireproof materials, molded coal is horizontally arranged and placed on the fire grate, holes are communicated to form a channel which is in parallel with the fire grate, the front furnace arc is arranged on the coal inlet, a second air pipe is embedded in the front furnace arc, at least one branch pipe is arranged, and the second wind pipe is connected with an air blower. The square molded coal boiler can pre-heat molded coal which is newly added, combustion initiation is rapid, the arrangement of the second wind pipe can reduce smoke discharge, heat is effectively utilized, the retention time of the molded coal in a blast chamber is prolonged, the burnout rate is improved, the coal saving rate can be improved by about 25%, the heat efficiency can reach 85%, the square molded coal boiler does not need a special dust-removing device, and the investment is saved.

Description

A kind of square briquette boiler

Technical field

The utility model relates to boiler, specifically belongs to a kind of square briquette boiler.

Background technology

At present, the square briquette boiler on the China market, when burning, square briquette is vertical placement in boiler, promptly places perpendicular to the direction of fire grate with the moulded coal hole, and air directly enters below fire grate, causes lower floor's moulded coal contact cold air, and it is insufficient to burn; During burning moulded coal from after ignite successively forward, initiate moulded coal temperature is low, it is slow to ignite; And the boiler soot emission amount is big, and the thermal efficiency is low.

The utility model content

The purpose of this utility model is to provide a kind of square briquette boiler, and this boiler briquette ignites soon, sufficient combustion, thermal efficiency height, and smoke discharge amount is little, and burning low-carbon (LC) fuel moulded coal.

The purpose of this utility model is achieved in that

A kind of square briquette boiler comprises fire grate, coal feed point, pushes away device for coal and preceding chimney arch, and described fire grate is the tabular fixed grate made from refractory material, and moulded coal horizontal arrangement on fire grate is placed, and its hole communicates and forms the passage parallel with fire grate; Can be embedded with airduct in the described fire grate, airduct one end links to each other with air blast, and the other end feeds air compartment, and air can be preheated during by airduct, helps burning; The top of described coal feed point is provided with preceding chimney arch, and preceding chimney arch is embedded with second airduct, and second airduct, one end links to each other with air blast, and the other end links to each other with the second airduct arm, and chimney arch entered burner hearth before the second airduct arm passed.

Described fire grate upper surface can be directed downwards 10 °-20 ° along the coal that pushes away of level.So both helped pushing away coal, also helped reducing the resistance of moulded coal hole flue gas.

Advantage of the present utility model: 1, fire grate is the tabular fixed grate made from refractory material, and moulded coal horizontal arrangement on fire grate is placed, and forms many passages in the combustion chamber, makes initiate moulded coal obtain preheating, and ignition is fast.2, the setting of second airduct can make dry distillation gas mix with hot-air, and burning has reduced soot emissions rapidly, has effectively utilized heat energy.3, moulded coal prolonged in the combustion chamber time of staying, and burn-off rate improves, and coal saving rate can improve about 25%, and the thermal efficiency can reach 85%.4, need not to be provided with special dust arrester, reduce investment outlay.

Description of drawings

Fig. 1 the utility model master looks cross-sectional view

Fig. 2 the utility model is overlooked and is with local step profile structural representation

Fig. 3 the utility model left side optic zone semi-section structural representation

Among the figure: 1-hanger, 2-thermometer socket, 3-water tank, 4-water tank atmosphere entry, the 5-titting water outlet, 6-shell, 7-chimney interface, smoke box behind the 8-, 9-encircles every cigarette, 10-heat-insulation layer, 11-shoot door, middle header tank behind the 12-, 13-chimney arch pipe, 14-chimney arch, 15-down-comer, 16-air compartment, the 17-pit, 18-airduct, 20-fire grate, 21-lower collecting box, 22-first plug, 23-pushes away device for coal, middle header tank before the 24-coal feed point, 25-, the 26-tedge, chimney arch before the 27-furnace tube, 28-, 29-second airduct, the 30-second airduct arm, 31-front smoke box, second group of smoke pipe of 32-, first group of smoke pipe of 33-, 34-first observation door, the 35-air blast, 36-air regulating board, 37-lower condensate sump, the 38-sewage draining exit, 39-water return outlet, 40-second observation door, the 41-moulded coal, 42-second plug, 43-sewage draining exit.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

First kind of embodiment: a kind of square briquette boiler, comprise fire grate 20, coal feed point 24, push away device for coal 23 and preceding chimney arch 28, described fire grate 20 is tabular fixed grates made from glass-cermic powder, glass-cermic powder aggregate, refractory cement, fire grate 20 upper surfaces are directed downwards 15 ° along the coal that pushes away of level, so both helped pushing away coal, also helped reducing the resistance of moulded coal hole flue gas; Be embedded with 3 airducts 18 in the fire grate 20, airduct 18 1 ends link to each other with air blast 35, and airduct 18 other ends feed air compartment 16, air enters air compartment 16 by airduct 18 under the promotion of air blast 35, enter moulded coal coal hole path then and burn, air is preheated when airduct 18, is beneficial to burning.The top of coal feed point 24 is provided with preceding chimney arch 28, is embedded with second airduct, 29, the second airducts, 29 1 ends in the preceding chimney arch 28 and links to each other with air blast 35, and the other end links to each other with 20 second airduct arms 30, and chimney arch 28 entered burner hearth before the second airduct arm 30 passed.

Square briquette enters burner hearth with horizontal spread pattern from coal feed point 24, carry out preheating at burner hearth, according to combustion case utilization push away device for coal 23 intermittently with moulded coal along fire grate 20 forward impelling, moulded coal coal hole alignment in the progradation, form many with the parallel passage of fire grate 20 upper surfaces; The air that air blast 35 enters, a part enters airduct 18 through air regulating board 36, the air that enters airduct 18 under the effect of fire grate 20 is preheated, preheated air enters air compartment 16, enter moulded coal coal hole path after the buffering, coal carries out heat exchange with burning completely earlier, discharges the heat that slag is taken away to reduce; Hot-air after the exchange carries out overheavy firing with imperfect combustion moulded coal again along the flue gas direction, to reduce the phosphorus content of moulded coal slag; Hot-air fully burns with the moulded coal that ignites then, and clean-burning high-temperature flue gas and the air moulded coal of preheating ignite; Exercise initiate moulded coal before flue gas continues and obtain preheating and destructive distillation, the destructive distillation gas that produces when flue gas and preheating, gap along chimney arch 14 and preceding chimney arch 28 is up, mix and the moment burning with the air of introducing from the second airduct arm 30 through preceding chimney arch 28 preheatings, remove black smoke effectively, reduce the charcoal loss that flue gas is taken away, increase the utilization rate of coal.This saving coals from boiler rate improves about 25%, and the thermal efficiency can reach 85%.

Second kind of embodiment: fire grate 20 upper surfaces are horizontally disposed with, and all the other are with first kind of embodiment.

Claims

1, a kind of square briquette boiler, comprise fire grate, coal feed point, push away device for coal and preceding chimney arch, it is characterized in that, described fire grate is the tabular fixed grate made from refractory material, moulded coal horizontal arrangement on fire grate is placed, and its hole communicates and forms the passage parallel with fire grate; Be embedded with airduct in the described fire grate, airduct one end links to each other with air blast, and the other end feeds air compartment; The top of described coal feed point is provided with preceding chimney arch, and preceding chimney arch is embedded with second airduct, and second airduct, one end links to each other with air blast, and the other end links to each other with the second airduct arm, and chimney arch entered burner hearth before the second airduct arm passed.

2, molded coal boiler as claimed in claim 1 is characterized in that, described fire grate upper surface is directed downwards 10 °-20 ° along the coal that pushes away of level.