CN202074511U

CN202074511U - Furnace capable of burning wet and low-calorie fuels

Info

Publication number: CN202074511U
Application number: CN2011201186705U
Authority: CN
Inventors: 李永红; 卢觉晓; 余波
Original assignee: HUIBO ANTI-CORROSION TECHNOLOGY Co Ltd HUANGSHI CITY
Current assignee: HUANGSHI FYBO MATERIAL TECHNOLOGY CO., LTD.
Priority date: 2011-04-21
Filing date: 2011-04-21
Publication date: 2011-12-14
Anticipated expiration: 2021-04-21

Abstract

The utility model relates to a furnace, and particularly to a fluidized bed furnace capable of burning wet and low-calorie fuels. The furnace consists of a feeding system, a burning area, a secondary burning area and a heat exchanging area. A drying chamber and a front-mounted chimney are arranged inside the feeding system, the wet and the low-calorie fuels can be dried, and a great amount of steam can be produced, so the temperature of the hearth can be improved. Due to the adoption of the secondary burning area, the fuel can be adequately burned, so the fuel can be saved. Due to the adoption of the furnace capable of burning the wet and the low-calorie fuels, not only can the problem that the industrial wet and low-calorie waste slag be effectively burned and reused, but also the labor intensity and the production cost can be greatly reduced.

Description

The boiler of a kind of burning humidity and low calorie fuels

Technical field

The utility model relates to a kind of boiler, is specifically related to the fluidized-bed combustion boiler of a kind of burning humidity and low calorie fuels.

Background technology

Have many enterprises can discharge some industrial residue material at present in China's industrial production in the actual production operation, these waste residue material total amounts are very big, containing lot of energy, then can save a large number of fuel cost for enterprise if it can be made full use of to act as a fuel.But because water content height in most of industrial residue material, calorific capacity is low, and is nonflammable.Such as the waste residue material after getting after drinking vinasse, husk or producing furfural etc.

Now the boiler type on the market is more, model is different, but these boilers all can not utilize water content to reach humidity and low calorie fuels that 40-50% and calorific capacity are lower than 3000 kilocalories preferably.Traditional common burning slag boiler is made up of upper drum, lower drum, fixed grate, cold wall pipe, convection tube, furnace wall and drum induced draught system, upper drum, fixed grate, cold wall pipe, convection tube and preceding furnace wall surround and form burner hearth, connect cold wall pipe between upper drum and the header, connect convection tube between upper drum and the lower drum.This tradition is burnt the slag boiler and is not suitable for using humidity and fuel of lower heating value, after being to feed intake, reason absorbed a large amount of heats because of water evaporates, fuel temperature can not reach ignition point immediately, could burn after must waiting fuel in burner hearth, to dry, this connects with regard to the fuel that causes the back to add does not get angry, and stove fire extinguishes easily.And use conventional boiler labour intensity big, and fuel combustion is insufficient, and waste is serious, can not satisfy the demand of ordinary production at all.

In order to solve the nonflammable problem of above-mentioned humidity and low calorie fuels, the utility model proposes the New-type boiler of a kind of burning humidity and low calorie fuels, the industrial residue material fully can be burnt, more efficent use of resources, energy savings meets the modern industry development trend.

Summary of the invention

The purpose of this utility model is the boiler that proposes the moist and low calorie fuels of a kind of burning, can utilize water content to reach humidity and low calorie fuels that 40-50% and calorific capacity are lower than 3000 kilocalories preferably.

Fuel boiler of the present utility model is made up of feeding system, combustion zone, intermediate zone and heat transfer zone.

Fuel boiler of the present utility model, described feeding system is made of material-falling hopper (1), preposition chimney (2), inclined reciprocating fire grate (3), drying chamber (8), warm-air pipe (12) and reductor (14), inclined reciprocating fire grate (3) is positioned at drying chamber (8) bottom, warm-air pipe (12) is positioned under the inclined reciprocating fire grate (3), and reductor (14) is connected by gear with inclined reciprocating fire grate (3).There is adjustment doors (13) lower end of preposition chimney (2).Has blanking adjustment doors (17) in the material-falling hopper (1).

Fuel boiler of the present utility model, described combustion zone is connected with feeding system, is made of the fluid bed (4) of its bottom and the combustion chamber (9) on its top.

Fuel boiler of the present utility model, described intermediate zone is connected with the combustion zone, is made of secondary combustion chamber (10) and fixed grate (15), and the fixed grate bottom has ash door (16).

Fuel boiler of the present utility model, described heat transfer zone is connected with the intermediate zone, is made of steamdrum (5), water drum (6), heat exchanger tube (7) and rear portion flue (11).The rear portion flue has adjustment doors (13).

Of the present utility model having the following advantages:

1. use in the utility model process, the waste residue material of the humidity of input is being dried through in the process of inclined reciprocating fire grate, helps burning.

2. use in the utility model process, a large amount of water vapours that produce when toasting moist fuel are discharged by preposition chimney, more help the timely flash baking of fuel.

3. use in the utility model process, can reach the purpose of the fuel that adapts to various different moisture contents by the adjustment doors of regulating preposition chimney and rear portion flue.

4. use in the utility model process, preposition chimney can avoid a large amount of low-temperature flue gas and steam becomes high-temperature flue gas by the combustion zone and steam is taken away a large amount of heats, more helps the fuel of abundant lower heat of combustion, also helps improving fire box temperature.

5. combustion chamber of the present utility model separates with heat transfer zone, and the heat exchange body is not established in the combustion chamber, has further improved the temperature of combustion chamber, more helps the abundant burning of low calorie fuels.

6. the intermediate zone that the utlity model has has solved the incomplete problem of fuel combustion, more helps the abundant burning of low calorie fuels.

7. the effect of sedimentation ashes has also been played in the intermediate zone that the utlity model has, and has alleviated washing away of ashes exchange heat pipe, helps the service life of prolonged boiler.

8. the fluid bed part that the utlity model has more helps full combustion of fuel, and is capable of saving fuel.

9. material-falling hopper that the utlity model has and inclined reciprocating fire grate can be realized automatic feed, greatly reduce labour intensity, have also reduced production cost.

Description of drawings

Boiler structure schematic diagram described in the utility model.

Among the figure: the 1st, material-falling hopper, the 2nd, preposition chimney, the 3rd, inclined reciprocating fire grate, the 4th, fluid bed, the 5th, steamdrum, the 6th, water drum, the 7th, heat exchanger tube, the 8th, drying chamber, the 9th, combustion chamber, the 10th, secondary combustion chamber, the 11st, rear portion flue, the 12nd, warm-air pipe, the 13rd, adjustment doors, the 14th, reductor, the 15th, fixed grate, the 16th, ash door, the 17th, blanking adjustment doors.

The specific embodiment

With moisture is that the furfural dregs of 45 % is a fuel.Adopt fuel boiler described in the utility model, exerting oneself of boiler design is 4 tons, the reductor rotating speed is set to 100 rev/mins, regulate the blanking adjustment doors discharge height is adjusted into 150 millimeters, by inclined reciprocating fire grate fuel is constantly rolled forward, feed intake to fluid bed continuously, utilize the radiant heat of combustion chamber and the heat of warm-air pipe to make fuel fully dry before entering the combustion chamber.When feeding intake the adjustment doors of preposition chimney opened approximately 80%, steam and low-temperature flue gas that drying course is produced are in time discharged.

Dried material falls into the combustion chamber, burns on fluid bed, and the fuel of after-flame is not blown into secondary combustion chamber fully, burning once more on fixed grate.The adjustment doors based on fuel of rear portion flue fixed is generally opened approximately 70% at stove hall combustion case, and notes what of ashes in the fixed grate, in time opens the grey goalkeeper ashes that burn and shovels out.

The described fuel boiler normal combustion of present embodiment can be to 3 tons/hour of other production equipment supplying high temperature steams, and exerting oneself reaches 75%, can satisfy general production needs fully.

Claims

1. the boiler of the moist and low calorie fuels of a burning, it is characterized in that described fuel boiler is made up of feeding system, combustion zone, intermediate zone and heat transfer zone, described feeding system and combustion zone are connected, the combustion zone is connected with the intermediate zone, and the intermediate zone is connected with heat transfer zone.

2. the boiler of a kind of burning humidity as claimed in claim 1 and low calorie fuels, it is characterized in that described feeding system is made of material-falling hopper (1), preposition chimney (2), inclined reciprocating fire grate (3), drying chamber (8), warm-air pipe (12) and reductor (14), inclined reciprocating fire grate (3) is positioned at drying chamber (8) bottom, and warm-air pipe (12) is positioned under the inclined reciprocating fire grate (3).

3. the boiler of a kind of burning humidity as claimed in claim 2 and low calorie fuels is characterized in that described preposition chimney (2) lower end has adjustment doors (13).

4. the boiler of a kind of burning humidity as claimed in claim 1 and low calorie fuels is characterized in that described combustion zone is made of the fluid bed (4) of bottom and the combustion chamber (9) of its top.

5. the boiler of a kind of burning humidity as claimed in claim 1 and low calorie fuels is characterized in that described intermediate zone is made of secondary combustion chamber (10) and fixed grate (15).

6. the boiler of a kind of burning humidity as claimed in claim 1 and low calorie fuels is characterized in that described heat transfer zone is made of steamdrum (5), water drum (6), heat exchanger tube (7) and rear portion flue (11).

7. the boiler of a kind of burning humidity as claimed in claim 6 and low calorie fuels is characterized in that its front end of described rear portion flue (11) has adjustment doors (13).