CN201184603Y

CN201184603Y - Additional device of chain-grate stoker coal-burning boiler capable of combusting agricultural wastes

Info

Publication number: CN201184603Y
Application number: CNU2007201310180U
Authority: CN
Inventors: 庄寿增; 陈长富; 林松
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University; Nanjing Agricultural University
Priority date: 2007-12-14
Filing date: 2007-12-14
Publication date: 2009-01-21
Anticipated expiration: 2017-12-14

Abstract

The utility model relates to a chain-grate stoker coal-fired boiler attached device capable of burning agricultural wastes. The device is characterized in that: a feed hopper, a delivery device and a blower for delivering the agricultural waste are additionally arranged on the lateral wall of a chain-grate stoker coal-fired boiler; the rice husk or the cut or chopped stalk of various crops is delivered to the front upper part of a chain-grate stoker under the action of the blower and undergo the suspension combustion to generate the heat. The chain-grate stoker coal-fired boiler attached device has the advantages of modified structure of the conventional coal-fired chain-grate stoker steam or hot water boilers in the village and town, low modification cost, easy operation, efficient treatment of the agricultural waste, reduced consumption of the coal resource, and less discharge of the harmful gas.

Description

The traveling-grate stoker coal-burning boiler attachment device of incendivity agricultural wastes

One, technical field

The utility model belongs to combustion apparatus design and manufacturing technology field, is specifically related to agricultural wastes are acted as a fuel be used for the design retrofit technology of coal-fired traveling-grate stoker steam or hot-water boiler.

Two, background technology

China is at present still at the various coal-burning boiler of a large amount of uses.China is again a large agricultural country simultaneously, the annual a large amount of agricultural wastes such as a large amount of crops shells, stalk that produce.These originally consumed the agricultural wastes of main body as rural energy, after the consumption mode of rural energy changed gradually, their effective utilization and processing became a great problem again.Under the more and more nervous background of the our times energy and resource provisioning, how efficiently to transform, utilize these agricultural wastes, thereby substitute the part coal resources, be one highly significant with Study on Value exploitation problem.

Three, summary of the invention

Purpose of design of the present utility model is to transform a large amount of at present coal-fired traveling-grate stoker steam or the hot-water boilers that use of China, with the alternative fuel of agricultural wastes as boiler, thus the purpose that reaches effective processing and utilizing agricultural wastes, saves coal resources and minimizing noxious gas emission.

Technical solution of the present utility model is: a kind of traveling-grate stoker coal-burning boiler attachment device of incendivity agricultural wastes is characterized in that additional blanking bin 2, conveying device 3, elevating hopper 4 and the air blast 6 that can carry agricultural wastes on common traveling-grate stoker coal-burning boiler 1.

For the dust that reduces all kinds of agricultural crop straws after rice husk in the elevating hopper 4 or cut-out, the pulverizing leaks the top that the air inlet of air blast 6 can be introduced elevating hoppers 4 by pipeline 5.

Four, description of drawings

Fig. 1 and Fig. 2 are respectively the traveling-grate stoker coal-burning boiler attachment device side and the facade structures simplified schematic diagram of incendivity agricultural wastes, and dotted portion is common coal-fired traveling-grate stoker steam or hot-water boiler, and heavy line partly is an attachment device.1 is common traveling-grate stoker coal-burning boiler among the figure, and 2 is blanking bin, and 3 is conveying device, and 4 is elevating hopper, and 5 is the air inducing pipeline, and 6 is air blast, and 7 is support.

Five, the specific embodiment

Embodiment one:

To rated capacity be 2～15t/h (1.4～10.5MW) common coal-fired traveling-grate stoker steam boiler is transformed, with its sidewall a burner hearth burning peep hole of close charge door change dog-house into and use.All kinds of agricultural crop straws after rice husk or cut-out, the pulverizing are dropped into blanking bins 2, drop into elevating hoppers 4 by ribbon conveyer or the feeding screw 3 all kinds of agricultural crop straws after with rice husk or cut-out, pulverizing, all kinds of agricultural crop straws after rice husk or cut-out, the pulverizing are conveyed into fire grate front upper place burner hearth efficient burning, produce heat energy by this burner hearth burning peep hole under the effect of air blast 6.

For the dust that reduces all kinds of agricultural crop straws after rice husk in the elevating hopper 4 or cut-out, the pulverizing leaks, the top that the air inlet of air blast 6 is introduced elevating hoppers 4 by pipeline 5.

All kinds of agricultural crop straws after rice husk or cut-out, the pulverizing are relatively more loose in order to adapt to, calorific value is lower than coal-fired combustion characteristics, can change the air inducing and the blower motor of former boiler into double-speed motor or frequency control motor, blast and air quantity during with all kinds of agricultural crop straw after adjustment, reduction combusting rice hull or cut-out, the pulverizing.

Because the supply of agricultural wastes biolobic material fuel has seasonality, when the agricultural wastes undercharge, as long as close additional dog-house, readjusts blast and air quantity, this system can recover to use coal-fired.

Important technological parameters:

Boiler rating 2～15t/h (1.4～10.5MW)

Agricultural wastes maximum delivery 0.5～4t/h (adjustable)

Air blast allocating power 1～3KW

Because all kinds of agricultural crop straw burning Dust Capacities after rice husk or cut-out, the pulverizing are bigger, for reducing dust emission, for the coal-burning boiler that does not adopt water film dedusting equipment, must set up water film dust removal device at exhaust opening.

Embodiment two:

To rated capacity is that 2～15t/h (transform, and establishes the dog-house about a 200 * 200mm newly at the close coal-fired charge door burning zone place of its sidewall, and all the other are with embodiment one by 1.4～10.5MW) common coal-fired traveling-grate stoker steam boiler product.

Adopt present technique, can transform a large amount of common coal-fired traveling-grate stoker steam or hot-water boilers near villages and towns in rural areas, improvement expenses is cheap and simple and easy to do.According to United Nations Framework Convention on Climate Change Kyoto Protocol regulation, the CO that biomass fuel combustion produces ₂Can be not counted in CO ₂Discharging; There is the emission problem of sulfur dioxide hardly in biomass fuel sulfur-bearing hardly again simultaneously.Therefore, adopt present technique not only to reach effective processing and utilizing agricultural wastes, saved the purpose of design of coal resources in a large number, also can reduce discharge of harmful gases in a large number.

Claims

1. the traveling-grate stoker coal-burning boiler attachment device of incendivity agricultural wastes, it is characterized in that going up additional blanking bin (2), conveying device (3), elevating hopper (4) and the air blast (6) that can carry agricultural wastes at traveling-grate stoker coal-burning boiler (1), the air inlet of air blast (6) is introduced the top of elevating hopper (4) by pipeline (5).