CN2272523Y

CN2272523Y - Counterflow horizontal internal combustion three return stroke chain furnace

Info

Publication number: CN2272523Y
Application number: CN 95213297
Authority: CN
Inventors: 安友
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-20
Filing date: 1995-06-20
Publication date: 1998-01-14
Anticipated expiration: 2005-06-20

Abstract

The utility model discloses a counterflow horizontal internal combustion chain furnace with three return strokes, which is composed of a drum, a furnace tube, a return stroke pyrotechnic tube, a front and a back smoke boxes, a chain grate, a blast and an induced draft device. A tongue-shaped furnace arch is arranged at the back end of the furnace tube, the chain grate which passes through a back fire wall is extended out of the furnace for a certain distance, and a coal adding bucket is arranged above the grate which is extended out of the furnace; coal which is supported and loaded by the grate can be sent into the furnace from the front end of the furnace by the blast which is moved from the tail end towards the front end of the furnace, the trend of fume flow in the furnace is opposite to the trend of the coal; a dust falling bucket is arranged at the front end of the furnace, and furnace dust can be discharged from the front end of the furnace to a water sealing soot cleaning pool through the dust falling bucket. The utility model can enlarge induced draft for operation under negative pressure, the coal is combusted completely, the combustible content in the furnace dust is low, dust deposit in the furnace is less, and the return stroke pyrotechnic tube is not blocked easily.

Description

Adverse current horizontal internal combustion three backhaul chain furnaces

The utility model relates to a kind of horizontal internal combustion three-pass boiler.

Existing horizontal internal combustion three backhaul chain furnaces have big than other structural shape boiler heating surfaces, processing ease, advantage such as simple, stable, but the fire grate trend air blast interior with entering stove moves towards identical, fire coal flame brushes can not well contact with the continuous new coal that adds to the bending of fire grate direct of travel down at air-flow its rapid row is fired, this phenomenon is aggravated along with the increasing of boiler air inducing, circuit fire phenomenon occurs when serious boiler can not normally be moved, so the negative pressure operation for a long time of existing horizontal internal combustion three backhaul chain furnaces.Coal-fired trend is identical with airflow direction along with burning of coal, engender that with descend the gradually oxygen supply of burning of oxygen content in the furnace gas that coal-fired layer contact deficiency makes that coal is difficult to fully, completing combustion, cause and contain a large amount of combustibles in the coal ash, so contain flammable object height in the existing horizontal internal combustion three backhaul chain furnace coal ash, the waste of coal is big, and can only burn and use fat coal.

The purpose of this utility model is improved existing horizontal internal combustion three backhaul chain furnaces, thoroughly eliminate the weak point of its existence, provide a kind of burning of coal fully, fully, it is low to contain combustible in the coal ash, both can burn with fat coal and also can burn the adverse current horizontal internal combustion three backhaul chain furnaces of using colm.

The purpose of this utility model realizes by following manner.

By horizontal drum, furnace duct, two, three backhaul pyrotechnics pipes, the traveling-grate stoker that has drive unit, the pyrotechnics chamber that furnace duct is communicated with two return pyrotechnics pipe, with two, the front smoke box that three backhaul pyrotechnics pipes are communicated with, import is connected with the outlet of three backhaul pyrotechnics pipes, the air blast that its outlet tipping has the back smoke box of the induced duct of air-introduced machine to constitute is entered the horizontal internal combustion three backhaul chain furnaces in the stove by the stokehold end traveling-grate stoker lengthening stretches out the outer segment distance of stove by passing the back wall with flues behind the pyrotechnics chamber, continuous coal bunker is loaded on and stretches out the outer fire grate top of stove, and drive unit drives fire grate and moved by stove Caudad stokehold.Coal is fallen on the fire grate by continuous coal bunker, is brought in the stove by fire grate, and coal-fired layer trend is reverse with airflow direction.The furnace duct front port ash dropping hopper that is tightly connected, the ash dropping hopper ash hole is sealed by the hydrolock ash removal pool.The stove of accent door is arranged at ash dropping hopper top, so that transfer the fire operation.The furnace duct rear port has an end to be connected with the back wall with flues that the other end stretches in the furnace duct and to the ligulate chimney arch of upper fin song, back wall with flues passes through the opening of fire grate by openable flashboard shutoff.

Further improving of adverse current horizontal internal combustion three backhaul chain furnaces is, there is the engine firewall of setting the fire grate both sides that are positioned at the pyrotechnics chamber, there is the fire insulation flat board fire grate below, erectting engine firewall is connected with ligulate chimney arch side, fire insulation is dull and stereotyped to connect and compose the fire insulation cover with the setting engine firewall, the fire insulation cover is isolated with fire grate and pyrotechnics chamber, prevents that fire grate is in high temperature cigarette, the roasting distortion down of fiery combustion or damage.

Adverse current horizontal internal combustion three backhaul mode chain furnace combustion bearings are opposite with airflow direction, thereby many adverse effects that coal-fired layer trend and airflow direction forward bring have been eliminated, coal is fully burned, combustible content descends greatly in the coal ash, boiler negative-pressure operation operation for a long time, both also burning colm of burning fat coal.But because negative-pressure operation, thereby can strengthen air inducing, improve the deposition that gas stream in the stove speed reduces dust, and then reduce deashing number of times in the stove.

Accompanying drawing is embodiment of the present utility model, further specifies the utility model below in conjunction with embodiment.

Fig. 1 is the structure chart of adverse current horizontal internal combustion three backhaul chain furnaces.

Fig. 2 is the A-A cutaway view of Fig. 1.

Fig. 3 is the B-B cutaway view of Fig. 1.

As shown in the figure, adverse current horizontal internal combustion three backhaul chain furnaces are by horizontal drum (1), with the whole furnace duct (2) that is connected of drum, be loaded on the traveling-grate stoker that has drive unit (9) in the furnace duct, place the two return pyrotechnics pipe (19) of flue both sides, place three backhaul pyrotechnics pipes (21) of furnace duct top, the pyrotechnics chamber (7) that furnace duct is communicated with two return pyrotechnics pipe, with two, the front smoke box (18) that three backhaul pyrotechnics pipes are communicated with, import is connected the back smoke box (5) that its outlet is connected with the induced duct that air-introduced machine (3) are housed (4) with the outlet of three backhaul pyrotechnics pipes, the air blast by the air blast in stove of stokehold end (13) that is loaded on the stokehold end constitutes, the traveling-grate stoker lengthening of boiler stretches out the outer segment distance of stove by passing back wall with flues (11) behind the pyrotechnics chamber, and the fire grate drive unit drives traveling-grate stoker by the stokehold end motion of stove Caudad.Continuous coal bunker (6) is loaded on and stretches out the outer fire grate top of stove, and coal is brought in the stove by fire grate by continuous being added on the traveling-grate stoker of continuous coal bunker, and coal-fired layer is dragged by fire grate and carries by the stokehold end motion of stove Caudad.Back wall with flues is equipped with flashboard (8) by the opening part of fire grate, and opening is opened or shutoff by flashboard.The flue mouth of pipe place that is positioned at the stove afterbody has an end to be connected with the back wall with flues that the other end stretches into furnace duct and to the ligulate chimney arch (10) of wing song, the flue gas by the stokehold end flow turn back under the upper fin ligulate end backstop so that by the ligulate chimney arch above enter the pyrotechnics chamber.The both sides that are positioned at the fire grate section in pyrotechnics chamber are equipped with the setting engine firewall that is connected with the back wall with flues, and the fire insulation flat board that is connected with the back wall with flues is arranged below the fire grate, erect engine firewall and are connected with ligulate chimney arch side, and fire insulation is dull and stereotyped to connect and compose fire insulation cover (20) with the setting engine firewall.The fire insulation cover completely cuts off fire grate and pyrotechnics chamber, prevents that fire grate is in high temperature cigarette, the roasting distortion down of baked wheaten cake or damage.For the ease of removing the dust stratification in the pyrotechnics chamber, deashing bucket (12) is arranged at bottom, pyrotechnics chamber, and dust stratification is removed outside the stove by the deashing bucket.Stokehold end furnace duct has been built stove baking (17) by laying bricks or stones, and closed ash dropping hopper (15) is tightly connected with stokehold end flue mouth, and the ash dropping hopper ash hole is sealed by hydrolock ash removal pool (14).Ash dropping hopper top is provided with transfers stove door (16), so that transfer the fire operation.

Claims

1, a kind of adverse current horizontal internal combustion three backhaul chain furnaces, comprise horizontal drum, furnace duct, two, three backhaul pyrotechnics pipes, the traveling-grate stoker that has drive unit, with furnace duct, the pyrotechnics chamber that two return pyrotechnics pipe is communicated with, with two, the front smoke box that three backhaul pyrotechnics pipes are communicated with, import connects the back smoke box that three backhaul pyrotechnics pipes outlet tipping has the induced duct of air-introduced machine, air blast is entered in the stove by the stokehold end, it is characterized in that passing after said traveling-grate stoker is by the pyrotechnics chamber back wall with flues and stretch out the outer segment distance of stove, drive unit drives fire grate and is moved by stove Caudad stokehold, continuous coal bunker is loaded on and stretches out the outer fire grate top of stove, the furnace duct forward end seal connects ash dropping hopper, leaking the ash bucket ash hole is sealed by the hydrolock ash removal pool, the stove of accent door is arranged at ash dropping hopper top, the furnace duct rear port has an end to be connected with the back wall with flues that the other end stretches in the furnace duct and to the ligulate chimney arch of upper fin song, back wall with flues passes through the opening of fire grate by openable flashboard shutoff.

2, by the described adverse current horizontal internal combustion three backhaul chain furnaces of claim 1, there is the engine firewall of setting the fire grate both sides that it is characterized in that being positioned at the pyrotechnics chamber, there is the fire insulation flat board fire grate below, ligulate chimney arch side is connected with the setting engine firewall, erect engine firewall and fire insulation flat board and connect and compose the fire insulation cover, the fire insulation cover is isolated with fire grate and pyrotechnics chamber.