CN2405117Y

CN2405117Y - Rotating grate

Info

Publication number: CN2405117Y
Application number: CN 00210541
Authority: CN
Inventors: 李悦平; 李文智
Original assignee: Individual
Current assignee: Jinzhou Spring Rolling Grate Factory; Li Yueping
Priority date: 2000-01-07
Filing date: 2000-01-07
Publication date: 2000-11-08
Anticipated expiration: 2010-01-07

Abstract

The utility model relates to a rotating combusting fire grate which solves the problems of low heat efficiency, large air resistance of fire grates, coal leakage of fire grates, a plurality of damageable parts, short running cycle and no guarantee of boiler normal cycle full load running of the existing fire grates. In the utility model, an air box is provided with an air blocking plate after a third roll shaft, the outer edge of a coal combusting device being used for forming the utility model is of a gear shape, a concave position and a convex position are all provided with vents, a ratchet wheel transmission and a ratchet pawl transmission are arranged between an outer side plate and an inner side plate which are the main parts of a driving device for enhancing the heat efficiency of the utility model, the bottom of the utility model is closed, the utility model has no coal leakage and air leakage, and the utility model has a flexible and reliable air adjusting method.

Description

Rotating grate

The utility model is the part body of power station, industrial heating boiler, particularly a kind of Rotating grate.

Middle-size and small-size generating, heat supply heating boiler are mainly traveling-grate stoker, spreader stoker, reciprocal grate, vibrating-grate stoker of grate firing type etc. at present in China.The common drawback of above-mentioned grate firing fire grate: fire grate is strict to coal, the fire grate of different types this fire grate of design coal of giving of can only burning, otherwise specified operational factor just can not guarantee boiler design the time.Undercapacity can occur, pressure is low, over-emitting black exhaust and coal consumption exceed design load.2, the thermal efficiency of boiler is low, and generally all about 65-72%, energy utilization rate is low, and unit consumption amount height is wasted primary energy in a large number.3, the windage of fire grate is big, gives wind pressure at 180-250mmH ₂About O.Can not fully burn for the not smooth coal of wind.The air excess flue gas is fast and short at residing time in furnace at the burner hearth flow velocity, can not learn reaction fully and emit the purpose that heat reaches completing combustion.The flue gas flow rate height is taken away a large amount of dust and is entered atmosphere; The lingemann blackness of flue gas＞1, i.e. over-emitting black exhaust.Contaminated environment increases heat loss due to exhaust gas simultaneously.4, fire grate leaks coal, leaks grey rate 5%-20%, and fire grate runs wind, and string wind makes the boiler room sanitary condition poor, and fireman's labour intensity is big.5, coal moves burning after by forward direction being plane and straight line on the fire grate, and coal is little with the contact area of giving wind, gives the wind inequality, and coal was generally about 25-35 minute in the time of staying on the fire grate.Can not completing combustion, ash content carbon has reduced the thermal efficiency of boiler up to 18-35%.6, the fire grate igniting is difficult, and banking fire is wanted in blowing out, and it is slow to play stove, a large amount of over-emitting black exhausts.7, fire grate structure complexity, part easy to wear is many, and the cycle of operation is short, can not guarantee the normal cycle oepration at full load of boiler.

The purpose of this utility model is, solves above-mentioned existing existing problem, provides a kind of thermal efficiency high Rotating grate.

The utility model is achieved in that and comprises that bellows, mainboard, heat insulation layer, buting iron, fire grate, chassis, transmission device connect and compose.Behind the 3rd roll shaft, bellows are installed choke plate; The outer rim of forming the coal-burning device of fire grate is a gear-like, and its recess is circular-arc, and recess and high spot are equipped with air vent.Between the critical piece outer panel of transmission device, the interior plate ratchet is installed, ratchet is installed by bearing pin; At inside and outside side plate several set bolts are installed, mounting spring between the set bolt of bottom and ratchet; Rotating shaft is connected and fixed by key, bolt and ratchet.

Advantage of the present utility model is, adopt above-mentioned new construction after, coal from front to back will be through the time about more than one hour, promptly by the four-stage that gives heat, drying, burning, after-flame, like this fuel time of staying on fire grate long, the time of burnouting is fully arranged.And because coal is constantly by loosening in the combustion process of Rotating grate, and fuel constantly does the floating curvilinear motion, constantly pulverizes owing to be subjected to the radiant heat of burner hearth, increased by the diminish contact area of piece and air of bulk, accelerates burning of coal speed.Coal just can be on Rotating grate after-flame fully, reach the purpose of increasing economic efficiency.The bottom of Rotating grate is sealed, so Rotating grate is not leak coal, does not leak out, and does not go here and there wind, does not run wind, transfers wind means flexibility and reliability.

The coal-burning device of Rotating grate is often cooled off by the wind that the rotating shaft two ends enter, and has both played the effect that air gives hot device, has protected the intensity of coal-burning device again, makes steady, safe, the economic operation of fire grate.

The drawing explanation:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a vertical view;

Fig. 3 is a left view;

Describe in detail below in conjunction with accompanying drawing:

As shown in the figure, comprise that bellows 10, mainboard 11, heat insulation layer 12, buting iron 13, fire grate 14, chassis 9, transmission device 15 connect and compose.Behind the 3rd roll shaft, bellows 10 are installed choke plate 16; The outer rim of forming the coal-burning device 2 of fire grate is a gear-like, and its recess is circular-arc, and recess and high spot are equipped with air vent.Ratchet 15 is installed between the critical piece outer panel 19 of transmission device 15, the interior plate 20, ratchets 8 is installed, several set bolts 18 are installed, mounting spring 7 between the set bolt 18 of bottom and ratchet 8 at inside and outside side plate by bearing pin 17; Rotating shaft 1 is connected and fixed with ratchet 5 by key 3, bolt 4.

Claims

1, a kind of Rotating grate comprises that bellows, mainboard, heat insulation layer, buting iron, fire grate, chassis, transmission device connect and compose; It is characterized in that behind the 3rd roll shaft, bellows are installed choke plate; The outer rim of forming the coal-burning device of fire grate is a gear-like, and its recess is circular-arc, and recess and high spot are equipped with air vent; Between the critical piece outer panel of transmission device, the interior plate ratchet is installed, ratchet is installed by bearing pin; At inside and outside side plate several set bolts are installed, mounting spring between the set bolt of bottom and ratchet; Rotating shaft is connected and fixed by key, bolt and ratchet.