CN101363615A

CN101363615A - Lignose fuel boiler

Info

Publication number: CN101363615A
Application number: CNA2008101957236A
Authority: CN
Inventors: 李�荣; 龚菲
Original assignee: Wuxi Huaguang Boiler Co Ltd
Current assignee: Wuxi Huaguang Boiler Co Ltd
Priority date: 2008-08-28
Filing date: 2008-08-28
Publication date: 2009-02-11
Anticipated expiration: 2028-08-28
Also published as: CN101363615B

Abstract

The invention provides a boiler using login as the fuel. The lignin is used as the main fuels, thus saving a large quantity of non-renewable mineral fuels and saving energies, at the same time, reducing the problem of environment pollution caused by the discard of the lignin, effectively solving the problem of material spilling of the login in the burning process and improving the burning efficiency of the boiler. The boiler using login as the fuel comprises a furnace hearth, a boiler drum, a steel frame, an inversion chain grate, a reburning chamber, a superheated chamber and a smoke channel in the tail part, wherein the furnace hearth is arranged on the steel frame; above the furnace hearth, the boiler drum is arranged and the inversion chain grate is arranged in the lower part of the furnace hearth; behind the furnace hearth, the reburning chamber, the superheated chamber and the smoke channel in the tail part are sequentially arranged. The boiler using login as the fuel is characterized by also comprising a lignin burner and a lignin spray seeding device, wherein the lignin burner is arranged on the side wall in the lower part of the furnace hearth and the lignin spray seeding device is arranged on the front wall of the lower part of the furnace hearth.

Description

Lignose fuel boiler

(1) technical field

The present invention relates to the boiler plant field, be specially lignose fuel boiler.

(2) background technology

When self-contained thermoelectric plant, industrial production, need to use the steam of boiler generation, the normally used fuel of boiler is fossil fuel such as coal, oil and gas, and fossil fuel are the non-renewable disposable energy, its price rises steadily, and causes production cost constantly to increase.Lignin is the discarded object of paper production, also be the valuable energy, if abandon as industrial refuse, not only waste resource, also pollute the environment, utilize lignin in boiler, to burn, the steam that produces is used for generating and steam supply, have the social benefit of energy savings, minimizing environmental pollution, good economic benefits is also arranged, but because the lignin particle is little, it is acted as a fuel when being directly used in common coal-burning boiler, it is more serious to leak the material phenomenon, and unburned carbon loss is big, and the efficiency of combustion of boiler is low.

(3) summary of the invention

At the problems referred to above, the invention provides lignose fuel boiler, it is main fuel with the lignin, a large amount of non-renewable fossil fuel have been saved, energy savings, also reduced because of lignin abandons the problem of environmental pollution that causes simultaneously, and can effectively solve the leakage material problem of lignin in combustion process, improved the efficiency of combustion of boiler.

Its technical scheme is such: it comprises burner hearth, drum, steelframe, the reversing traveling-grate stoker, burning chamber, the superheater chamber, back-end ductwork, described burner hearth is installed on described steelframe, described drum is installed above described burner hearth, lower disposed reversing traveling-grate stoker at described burner hearth, behind described burner hearth, be disposed with burning chamber, superheater chamber and back-end ductwork, it is characterized in that: it also comprises the lignin burner, the lignin device of sowing grass seeds by duster, described lignin burner is installed on the side wall of described lower furnace portion, and the described lignin device of sowing grass seeds by duster is installed on the front wall of described lower furnace portion.

It is further characterized in that: it comprises that also mechanical wind-force throws coal equipment, and described mechanical wind-force is thrown coal equipment and is arranged at and is positioned at the sow grass seeds by duster side wall of the described lower furnace portion below the device of lignin; It also comprises the soot blower that is arranged in each heating surface; Be furnished with face arch in described lower furnace portion, the place is furnished with the secondary air feed system at forward and backward wall; The indoor order of described superheater is equipped with high temperature superheater, medium temperature overheater and low temperature superheater.

The present invention is compared with the ordinary fossil fuel boiler, its beneficial effect is: it uses the discarded object lignin of paper production to be main fuel, do not need a large amount of non-renewable mineral matter fuel that use, saved the energy, and made full use of the discarded object of this paper production of lignin, solved because of lignin arbitrarily abandons the environmental pollution problems that causes, turned waste into wealth; Utilize the lignin burner can avoid short grained lignin to drain under the grate surface effectively, and lignin is burnt fully, in addition, utilize the lignin burner to make that the aerodynamic field in the burner hearth is better, the time that lignin stops in stove increases, thereby can obtain better combustion efficiency.

(4) description of drawings

Fig. 1 is a structural representation of the present invention.

(5) specific embodiment

See Fig. 1, the present invention includes burner hearth 2, drum 1, steelframe 3, reversing traveling-grate stoker 8, burning chamber 11, superheater chamber 12, back-end ductwork 10, burner hearth 2 is installed on the steelframe 3, drum 1 is installed above burner hearth 2, lower disposed reversing traveling-grate stoker 8 at burner hearth 2, behind burner hearth 2, be disposed with burning chamber 11, superheater chamber 12 and back-end ductwork 10, it also comprises lignin burner 4, the lignin device 7 of sowing grass seeds by duster, lignin burner 4 is installed on the side wall of burner hearth 2 bottoms, the lignin device 7 of sowing grass seeds by duster is installed on the front wall of burner hearth 2 bottoms, it also comprises mechanical wind-force throwing coal equipment 6, and mechanical wind-force is thrown coal equipment 6 and is installed on the side wall of burner hearth 2 bottoms, lignin device 7 bottoms of sowing grass seeds by duster; Because lignin caking property is stronger, in order to prevent heating surface coking and dust stratification, it arranges soot blower 16 at each heating surface, can in time remove coking and dust stratification on the heating surface, does not influence the heat transfer of each heating surface; In burner hearth 2 lower disposed face arch 17 is arranged, help lignin and enter burner hearth be heated back moisture rapidly evaporation and vaporization and burning; The place is furnished with secondary air feed system 18 at forward and backward wall, can strengthen the disturbance of flue gas, causes the flue gas vortex, prolong smoke flow process, and the needed oxygen of aftercombustion; In the superheater chamber 12 order be equipped with high temperature superheater 15, in wet superheater 14 and low temperature superheater 13; 9 for slagging tap and ash discharge equipment among the figure, and 5 is economizer.

During boiler operatiopn, the coal that is difficult for coking is thrown coal equipment 6 by mechanical wind-force to be shed on grate surface, on the coal seam, shed lignin again by the lignin device 7 of sowing grass seeds by duster, because the coal seam isolates lignin and fire grate, not only can reach the purpose of burning lignin, and prevented combustion product coking on grate surface of lignin effectively, and by lignin burner 4 fully after the burning, the flue gas of generation flow through successively burner hearth 2, burning chamber 11, superheater chamber 12 and back-end ductwork 10.Superheaters in the superheater 12 also can be arranged according to actual instructions for use, when the parameter of steam be time high temperature sub-high pressure, need layout high temperature superheater 15, medium temperature overheater 14 and low temperature superheater 13; When the parameter of steam is medium temperature and medium pressure, need to arrange high temperature superheater 15 and low temperature superheater 13; And when the parameter of steam is low pressure, only need to arrange low temperature superheater 13; Saturated stove does not need to arrange superheater.

Claims

1, lignose fuel boiler, it comprises burner hearth, drum, steelframe, the reversing traveling-grate stoker, burning chamber, the superheater chamber, back-end ductwork, described burner hearth is installed on described steelframe, described drum is installed above described burner hearth, lower disposed reversing traveling-grate stoker at described burner hearth, behind described burner hearth, be disposed with burning chamber, superheater chamber and back-end ductwork, it is characterized in that: it also comprises the lignin burner, the lignin device of sowing grass seeds by duster, described lignin burner is installed on the side wall of described lower furnace portion, and the described lignin device of sowing grass seeds by duster is installed on the front wall of described lower furnace portion.

2, according to the described lignose fuel boiler of claim 1, it is characterized in that: described its comprises that also mechanical wind-force throws coal equipment, and described mechanical wind-force is thrown coal equipment and is arranged at and is positioned at the sow grass seeds by duster side wall of the described lower furnace portion below the device of lignin.

3, according to the described lignose fuel boiler of claim 2, it is characterized in that: it also comprises the soot blower that is arranged in each heating surface.

4, according to the described lignose fuel boiler of claim 3, it is characterized in that: be furnished with face arch in described lower furnace portion, the place is furnished with the secondary air feed system at forward and backward wall.

5, according to the described lignose fuel boiler of claim 4, it is characterized in that: the indoor order of described superheater is equipped with high temperature superheater, medium temperature overheater and low temperature superheater.