CN201387005Y

CN201387005Y - Dust-removing fluidized-bed furnace

Info

Publication number: CN201387005Y
Application number: CN200820158671U
Authority: CN
Inventors: 向立和; 郑令元
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-03
Filing date: 2008-10-03
Publication date: 2010-01-20
Anticipated expiration: 2018-10-03

Abstract

The utility model relates to a dust-removing fluidized-bed furnace, which belongs to the field of the combustion device for fault coal, coal gangue or stone coal. The traditional fluidized-bed furnace has the weaknesses that the abrasion of the pipelines is serious, dust blocks the airflow passage and pollutes the environment, the heat loss is vast and the heat efficiency is low. The utility model is characterized in that one or more diffusion-type cyclone dust catchers is/are arranged on the position which is adjacent to a combustion chamber inside a furnace body, an ash blocking cone body is arranged on the lower part inside the diffusion-type cyclone dust catcher, one end of a high-temperature smoke-gas output pipe is communicated with the upper part position inside the diffusion-type cyclone dust catcher, and the lower part position of the diffusion-type cyclone dust catcher is provided with an ash discharging device; a dust falling passage and a connection point are arranged between the ash blocking cone body and the diffusion-type cyclone dust catcher; and the upper section of the inner cavity of the diffusion-type cyclone dust catcher presents in a cylindrical shape, the middle section presents in a round-platform shape, and the lower section presents in a cone shape. The dust-removing fluidized-bed furnace is used for supplying heat to the devices requiring the heat supply, effectively solves the problems that the air flue and the smoke pipe are blocked, and also solves the environmental pollution problem, so that the heat loss is reduced.

Description

The dedusting fluidized bed furnace

Technical field

The utility model relates to a kind of combustion apparatus of colm, gangue or bone coal, particularly relates to a kind of dedusting fluidized bed furnace high to high temperature fume dust removal efficient.

Background technology

Traditional boiling furnace combustion technology becomes basically universal at present, its fluidized bed furnace is mainly used in burning low grade coal, gangue or bone coal, earlier colm or gangue or stone coal powder are broken into the particle below 10 millimeters before the burning, join the combustion chamber with coal feeder then, the bottom, combustion chamber connects high pressure positive blower, the high pressure draught that high pressure positive blower produces upwards blows by the coal-fired particle of the wind hole on the air distribution plate with the combustion chamber, roll, similar fluidized state, fire coal burns under fluidized state, in combustion process, the rough coal slag is discharged from the cinder notch that overflows, and thinner dust moves with thermal current, flows to the equipment that is heated.The drawback of this combustion apparatus is: the one, contain a large amount of dust in the thermal current that produces during owing to burning, under the effect of air-flow, the dust-laden high temperature gas flow is constantly washing away the equipment of being heated, as fire tube, the smoke pipe of boiler, cause the pipeline excessive wear, reduction of service life; The 2nd, the dust in the thermal current collides postprecipitation with the equipment that is heated at the volley, stops up gas channel, and equipment can not normally be moved, and reduces the running rate of equipment; The 3rd, contain a large amount of dust in the thermal current that produces during owing to burning, thermal current enters aerial back surrounding environment is caused severe contamination; The 4th, heat loss is bigger, and the thermal efficiency is lower.Because there is above drawback in traditional fluidized bed furnace, thereby has limited the development of boiling furnace combustion technology.

The utility model content

Technical problem to be solved in the utility model is, overcomes the above-mentioned drawback that traditional fluidized bed furnace exists, and provides a kind of colm or gangue or bone coal of can utilizing to carry out Boiling Combustion, can reduce the dedusting fluidized bed furnace of dust content in the high-temperature flue gas again.

The technical scheme that its technical problem that solves the utility model adopts is: the dedusting fluidized bed furnace, comprise body of heater, in body of heater, design combuster, design has fire brick layer and adiabator layer between combustion chamber and body of heater, in the design of combustion chamber bottom position air distribution plate is arranged, corresponding site design at body of heater has the feeder coal feed point, blower inlet, operation fire door and excessive cinder notch, it is characterized in that: in body of heater, more than one proliferation cyclone is arranged with the design of combustion chamber position adjacent, proliferation cyclone is communicated with the combustion chamber through passage, design has a dust retaining cone body near lower position in proliferation cyclone, high-temperature flue gas efferent duct one end is communicated with proliferation cyclone internal upper part position, in the design of proliferation cyclone lower position one ash exhauster is arranged.

In technique scheme, design has dust whereabouts passage and tie point between the inwall of dust retaining cone body and proliferation cyclone.

The inner chamber epimere of described proliferation cyclone is cylindrical, the stage casing is truncated cone-shaped, hypomere is conical.

The beneficial effects of the utility model are: the dedusting fluidized bed furnace that adopts said structure and shape, owing in body of heater, more than one proliferation cyclone is arranged with the design of combustion chamber position adjacent, proliferation cyclone is communicated with the combustion chamber through passage, design has a dust retaining cone body near lower position in proliferation cyclone, high-temperature flue gas efferent duct one end is communicated with proliferation cyclone internal upper part position, in the design of proliferation cyclone lower position one ash exhauster is arranged, thereby traditional fluidized bed furnace that can burn colm or the gangue or the bone coal that can burn, has same combustion efficiency, the more traditional fluidized bed furnace of dust content has reduced more than 90% in the high-temperature flue gas that different produce when being this dedusting boiling furnace combustion, solved the obstruction air channel effectively, the problem of smoke pipe, solved simultaneously problem of environmental pollution effectively, and make the corresponding minimizing of heat loss, the fire tube of boiler, corresponding prolongation in the service life of ducts such as smoke pipe.This boiling furnace combustion technology is specially adapted to the grate-type boiler improvement, and the equipment that is heated that also can be applicable to the baking of Thistle board and the few dirt thermal current of high temperature need be provided has the double meaning of not only energy-conservation but also environmental protection.

Description of drawings

Fig. 1 is the cutaway view of the utility model along B-B line among Fig. 2;

Fig. 2 is the cutaway view of the utility model along A-A line among Fig. 1.

Among the figure, 1, feeder coal feed point 2, blower inlet 3, air distribution plate; 4, combustion chamber; 5, operation fire door; 6, excessive cinder notch; 7, proliferation cyclone 8, ash exhauster; 9, high-temperature flue gas efferent duct; 10, dust retaining cone body; 11, fire brick layer; 12, adiabator layer; 13, body of heater.

The specific embodiment

Referring to Fig. 1 and Fig. 2, the described a kind of dedusting fluidized bed furnace of present embodiment, comprise body of heater 13, design combuster 4 in body of heater 13, design has fire brick layer 11 and adiabator layer 12 between combustion chamber 4 and body of heater 13, the design of 4 bottom positions has air distribution plate 3 in the combustion chamber, corresponding site design at body of heater 13 has feeder coal feed point 1, blower inlet 2, operation fire door 5 and excessive cinder notch 6, it is characterized in that: in body of heater 13, a proliferation cyclone 7 is arranged with the design of combustion chamber 4 position adjacent, proliferation cyclone 7 is communicated with combustion chamber 4 through passage, design has a dust retaining cone body 10 near lower position in proliferation cyclone 7, high-temperature flue gas efferent duct 9 one ends are communicated with proliferation cyclone 7 internal upper part positions, in the design of proliferation cyclone 7 lower positions one ash exhauster 8 are arranged; Design has dust whereabouts passage and a tie point between the inwall of dust retaining cone body 10 and proliferation cyclone 7, and the purpose of design dust retaining cone body 10 is that the dust that prevents to fall into dust retaining cone body 10 bottoms enters the last fragment position in the proliferation cyclone 7 again; The purpose of design whereabouts passage is to be convenient to dust to drop to lower position in the proliferation cyclone 7; The purpose of design tie point is to be convenient to being connected between dust retaining cone body 10 and proliferation cyclone 7 inwalls; The inner chamber epimere of described proliferation cyclone 7 is cylindrical, the stage casing is truncated cone-shaped, hypomere is conical, and designing this shape is to be convenient to dust, improves dust-collecting efficiency; In body of heater 13,, its objective is in order to gather dust, solve problem of environmental pollution, and make the corresponding minimizing of heat loss, improve the service life of fluidized bed furnace with proliferation cyclone 7 of combustion chamber 4 position adjacent design.Put into pyrophoric fuel from operation fire door 5 during operation, light the fire in a stove before fuel is added, open air blast, blow in the stove through blower inlet 2, and unlatching feeder, fire coal after the fragmentation is sent combustion chamber 4 by feeder to through feeder coal feed point 1, under the effect of air blast air-flow, coal-fired Boiling Combustion on air distribution plate 3, enter proliferation cyclone 7 under the effect of the high temperature dust flue gas air-introduced machine outside stove that produces, the dust that proliferation cyclone 7 is collected is discharged by the ash exhauster 8 of proliferation cyclone 7 bottoms, and the high temperature gas flow after the dedusting is transported to the equipment of being heated through the high-temperature flue gas efferent duct 9 on proliferation cyclone 7 tops.

Above-described only is a preferred implementation of the present utility model.What deserves to be explained is; for the person of ordinary skill of the art; under the prerequisite that does not break away from the utility model principle; can also make some distortion and improvement to the utility model; for example: in body of heater 13, more than one proliferation cyclone 7 is arranged with the design of combustion chamber 4 position adjacent; proliferation cyclone 7 is communicated with combustion chamber 4 through passage; design has a dust retaining cone body 10 near lower position in proliferation cyclone 7; high-temperature flue gas efferent duct 9 one ends are communicated with proliferation cyclone 7 internal upper part positions; there are an ash exhauster 8, these features to belong to the scope of the utility model patent application protection equally in the design of proliferation cyclone 7 lower positions.

Claims

1, the dedusting fluidized bed furnace, comprise body of heater (13), design combuster (4) in body of heater (13), design has fire brick layer (11) and adiabator layer (12) between combustion chamber (4) and body of heater (13), the design of (4) bottom position has air distribution plate (3) in the combustion chamber, corresponding site design at body of heater (13) has feeder coal feed point (1), blower inlet (2), operation fire door (5) and excessive cinder notch (6), it is characterized in that: in body of heater (13), more than one proliferation cyclone (7) is arranged with the design of combustion chamber (4) position adjacent, proliferation cyclone (7) is communicated with combustion chamber (4) through passage, design has a dust retaining cone body (10) near lower position in proliferation cyclone (7), high-temperature flue gas efferent duct (9) one ends are communicated with proliferation cyclone (7) internal upper part position, in the design of proliferation cyclone (7) lower position one ash exhauster (8) is arranged

2, dedusting fluidized bed furnace according to claim 1 is characterized in that: with the design of combustion chamber (4) position adjacent a proliferation cyclone (7) is arranged in body of heater (13).

3, dedusting fluidized bed furnace according to claim 1 and 2 is characterized in that: design has dust whereabouts passage and tie point between the inwall of dust retaining cone body (10) and proliferation cyclone (7).

4, dedusting fluidized bed furnace according to claim 1 and 2 is characterized in that: the inner chamber epimere of described proliferation cyclone (7) is cylindrical, the stage casing is truncated cone-shaped, hypomere is conical.