CN2332896Y

CN2332896Y - Single-layer back-burning coal-storage burner for coal boiler and kiln

Info

Publication number: CN2332896Y
Application number: CN 97221516
Authority: CN
Inventors: 徐振民; 鹿则华
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-21
Filing date: 1997-07-21
Publication date: 1999-08-11
Anticipated expiration: 2007-07-21

Abstract

The utility model relates to a single-layer back-burning coal-storage burning chamber for coal boilers and kilns. A vertical shaft type coal-storage combustion chamber is formed between a water-cooling coal grid pipe composed of a plurality of transverse water pipes and a furnace chamber wall which is provided with a coal throwing opening. A smoke blocking jacketed wall is arranged on the rear side of the water-cooling coal grid pipe, and a back-burning combustion chamber is formed. A transverse secondary air pipe is provided approaching to the lower wall of a smoke gas jacketed wall. A grate is composed of a roller type grate and an inclined grate. A plurality of radical convex teeth and ventilation slots are arranged on the exterior of a roll shaft of the roller type grate. The inclined grate and the furnace chamber are placed in a definite oblique angle. The utility model has the advantages of complete combustion of combustion coal, high heat efficiency, energy saving, smoke and dust elimination, and little environmental pollution.

Description

Be applied to the anti-coal storage formula combustion chamber of burning of individual layer of coal-burning boiler and stove

The utility model relates to coal-burning boiler structure, a kind of specifically anti-coal storage formula combustion chamber of burning of individual layer that is applied to coal-burning boiler and stove.

At present, China is in industry coal-boiler and civil boiler, its fire grate can be divided into reciprocal grate substantially, traveling-grate stoker, double-layer grate and common individual layer fire grate etc. are several, coal-based originally be the tiling or be deposited on the fire grate, or motion burning forward, (for reciprocal grate and traveling-grate stoker) or anti-burn (for double-layer grate) or original position burning adopts in (for the individual layer fire grate) boiler more than 350KW back and forth and chain fire-gate many, and the shortcoming of these two kinds of fire grates is to need driven by power, floor space is big, metal consumption height, and easy break-down are in the heating stove or tea-bath furnace below 350KW, adopt the many of double-layer grate, the advantage of this fire grate is that flue gas can instead burn, and is energy-conservation, eliminate smoke better, its shortcoming is to be suitable for moulded coal, coal feeding amount is little, and operation is frequent

The purpose of this utility model provides a kind of anti-coal storage formula combustion chamber of burning of individual layer that is applied to coal-burning boiler and stove, certain height is holded up in traditional tiling on horizontal fire grate or the coal seam of stacking, be aided with necessary device, constituted the anti-combustion chamber of burning of vertical shaft type coal storage individual layer, it is complete to reach fired coal combustion, thermal efficiency height, energy-conservation, smoke abatement and dust control reduce environmental pollution, and easy to operate purpose.

The purpose of this utility model is achieved in that

A kind of anti-coal storage formula combustion chamber of burning of individual layer that is applied to coal-burning boiler and stove, its structure comprises body of heater, water tank, water pipe or fire tube, burner hearth, fire grate, air drift, coal-feeding door, ash door, chimney is characterized in that the structure of its combustion chamber is:

At burner hearth middle part partially the back upper place be provided with apart from fire grate suitably height by some horizontal water pipes suitable transversely arranged water-cooled coal bank tube of forming of distance at interval, each horizontal water pipe two ends is communicated with furnace wall water-cooled interlayer, this water-cooled coal bank tube and be provided with and form vertical shaft type coal storage combustion chamber between the hearth wall of coal feeding hole;

Rear side at described water-cooled coal bank tube is provided with retaining cigarette jacketed wall, its height is corresponding with the height of water-cooled coal bank tube and fire smoke gases that can will circulate from coal bank tube space come is introduced anti-burning the in the anti-burning combustion chamber, the flue of flue gas through retaining cigarette jacketed wall below enters aulic region water heated, be provided with a horizontal secondary air channel near retaining cigarette jacketed wall lower wall, this airduct tube wall is shaped on the downward and wind hole backward of dense distribution, to carrying out secondary blast from the anti-flue gas that burns in retaining cigarette jacketed wall lower end, this horizontal secondary air channel connects vertical secondary air channel, and this vertical airduct is communicated with the air blast air delivery duct;

Fire grate is made of roll-type fire grate and tilting fire grate, the roll-type fire grate comprises a Heavenly Stems and Earthly Branches roll shaft as for, every roll shaft cylindrical is provided with intensive staggered some radially protruding teeth, be cast with ventilation slot by different angles on the roll shaft, wherein one to two roll shaft is arranged on the rear side of coal bank tube, this roll shaft is bearing in the axle bed of body of heater and can handles rotation outside stove, tilting fire grate is made of the some strip fire grates space certain interval that becomes a fixed inclination to place with burner hearth, this tilting fire grate one end bearing is in burner hearth sidewall, an end bearing in the burner hearth underframe and with roll-type fire grate adjacency

Below the coal-feeding door of body of heater and tilting fire grate above antetheca be provided with air door.

When described combustion chamber was applied to industrial furnace, described water-cooled coal bank tube and building enclosure can change into used the refractory material body plan.

The utility model has following actively useful effect:

The structure of this combustion chamber and principle can be widely used in designing tea-bath furnace, hot-water heating stove, hot-blast stove industrial furnace etc.(when being used for industrial furnace, need the building enclosure part changed into refractory material by water jacket and build by laying bricks or stones) derive a collection of brand-new type of furnace, this combustion chamber combines forward combustion and reverse burning, in energy-conservation, smoke abatement and dust control, improve environment and labour intensity, aspects such as energy savings material have remarkable result.

At present, utilize the structure and the principle of this combustion chamber, design experiment success by the tea-bath furnace of the different size of 15KW～200KW, hot-water heating stove, steaming stove etc.

Now in conjunction with the accompanying drawings with preferred embodiment:

Fig. 1 is the structural representation of combustion chamber of the present utility model part;

Fig. 2 is the embodiment schematic diagram that the utility model is applied to heating boiler, is front view.

Fig. 3 is the right view of Fig. 2.

Fig. 4 is the vertical view of Fig. 2.

Fig. 5 is the A-A parting view of Fig. 2.

Fig. 6 is that the B-B of Fig. 5 partly cuts open the local parting view that partly cuts open combination with C-C.

Fig. 7 is that the D of Fig. 6 is to partly cuing open the cross sectional view of combination with E-E.

Fig. 8 is the example structure schematic diagram that the utility model is applied to the multipurpose household tea-bath furnace.

The same Fig. 8 of Fig. 9 is another embodiment.

Accompanying drawing number:

1. vertical shaft type coal storage combustion chamber

2. the anti-combustion chamber 201. anti-passages that burn that burn

3. water-cooled coal bank tube 4. keeps off the cigarette jacketed walls

5. secondary air channel 501. vertical tubes

6. boiler internal fire pipe district 601. flues

7. water tank 701. water pipes

8. body of heater 801. body water-cooling interlayers

9. the radially protruding tooth on roll-type fire grate 901. roll shafts

902. ventilation slot

10. tilting fire grate 11. coal-feeding doors

12. air door 13. ash doors (main air intake)

14. grey chamber 15. air drifts

16. chimney 17. returns smoke-box

The anti-coal storage formula combustion chamber of burning of individual layer that is applied to coal-burning boiler and stove of the present utility model, its structure comprises body of heater 8, water tank 7, water pipe or fire tube 6, burner hearth, fire grate, air drift 15, coal-feeding door 11, ash door 13, chimney 16, the structure of its combustion chamber is:

At burner hearth middle part partially the back upper place be provided with apart from fire grate suitably height by some horizontal water pipes suitable transversely arranged water-cooled coal bank tube of forming 3 of distance at interval, each horizontal water pipe two ends is communicated with furnace wall water-cooled interlayer, this water-cooled coal bank tube 3 and be provided with and form vertical shaft type coal storage combustion chamber 1 between the hearth wall of coal feeding hole 11;

Rear side at described water-cooled coal bank tube is provided with retaining cigarette jacketed wall 4, its height is corresponding with the height of water-cooled coal bank tube and fire smoke gases that can will circulate from coal bank tube space come is introduced anti-burning the in the anti-burning combustion chamber 2, the flue 601 of flue gas through retaining cigarette jacketed wall below enters 6 pairs of water heating of aulic region, be provided with a horizontal secondary air channel 5 near retaining cigarette jacketed wall lower wall, this airduct tube wall is shaped on the downward and wind hole backward of dense distribution, to carrying out secondary blast from the anti-flue gas that burns in retaining cigarette jacketed wall lower end, this horizontal secondary air channel connects vertical secondary air channel 501, and this vertical airduct is communicated with air blast air delivery duct 15;

Fire grate is made of roll-type fire grate and tilting fire grate, the roll-type fire grate comprises a Heavenly Stems and Earthly Branches roll shaft 9 as for, every roll shaft cylindrical is provided with intensive staggered some radially protruding teeth 901, be cast with ventilation slot 902 by different angles on the roll shaft, wherein one to two roll shaft rear side of being arranged on coal bank tube 3 is seen Fig. 1, this roll shaft is bearing in the axle bed of body of heater and can handles rotation outside stove, tilting fire grate 10 is made of the some strip fire grates space certain interval that becomes a fixed inclination to place with burner hearth, this tilting fire grate one end bearing is in burner hearth sidewall, an end bearing in the burner hearth underframe and with roll-type fire grate adjacency.

Below the coal-feeding door of body of heater and tilting fire grate above antetheca be provided with air door 12.

When described combustion chamber was applied to industrial furnace, described water-cooled coal bank tube 3 and building enclosure can change into used the refractory material body plan.

Design feature of the present utility model and operation principle:

1, with water-cooled coal bank tube (caliber φ) 6 * 4～φ 89 * 4; about tube pitch 105～120, quantity is decided on different capacity) or fire-resistant coal grid special shaped brick vertical shaft type stores every becoming on coal bank tube right side, gasification and burning with coal, look different capacity; it is thick that coal can reach 300～2000 (mm); and the coal that will the back adds places the back of high temperature cherry red coal, and this combustion chamber both had been suitable for the coal that looses, lump coal; also be suitable for the moulded coal coal briquette; because added solid sulphur composition in the coal briquette, so, be very beneficial for environmental protection.

2, design has a flue between retaining cigarette water jacket (or wall) and coal bank tube, the sectional area of this flue is also decided on different capacity, gasify the slit flow of coal gas between the coal bank tube that to this space, flow downward then, when running into the high temperature coal of cherry red above the fire grate, it is on fire to burn, and flue gas is made progress by the left side that keeps off cigarette water jacket or (retaining cigarette wall) or flows to other heating surface or stove heating clamber left then.

3, fire grate is made of 1 or some roll-type fire grates and tilting fire grate, wherein one or two roll-type fire grates are arranged on the left side of coal bank tube, make the high temperature coal flow burning that folds fugitive constituent to this above fire grate, like this, the coal of high temperature cherry red has been in the place ahead that retaining cigarette water jacket (or wall) flows through the black smoke gas (coal gas) that comes, stopped black smoke, make it burning, reached the purpose of energy-saving and smoke-removing, be cast with ventilation slot by different angles above the roll-type fire grate, upwards flow to strengthen the fire grate bottom air, strengthen burning and cooling fire grate, the radially protruding tooth of roll-type fire grate can be with institute's coking slag grating, the purpose that tilting fire grate is set has two, one is that the ashes on right side are flowed to the direction of roll-type fire grate, and one is that air can quicken the burning of high-temperature region from the combustion-supporting grate firing that more helps coal of oblique side direction.

4, be provided with secondary air channel in the below of retaining cigarette cover (or wall), it is DN40～DN80 that caliber is looked different capacity, and this secondary air channel passes lower water jacket or furnace wall and grey chamber and communicates, and air is after grey chamber has absorbed the heat in the ashes, enter secondary air channel, by the oral pore ejection of a left side, downside, so just more quickened the burning of flue gas, for boiler then, lower water jacket has the effect of cooling secondary air channel, make it to avoid burning out, for stove, this secondary air channel will be done and appropriate processing.

5, look the power difference, on the tilting fire grate in right side, also can design one, to strengthen the gasification and the burning of coal storage in the vertical shaft to several air doors.

6, can be furnished with blast pipe in grey chamber, the puddle can be established in bottom, grey chamber, is beneficial to the generation of water-gas.

Claims

1, a kind of anti-coal storage formula combustion chamber of burning of individual layer that is applied to coal-burning boiler and stove, its structure comprises body of heater, water tank, water pipe or fire tube, burner hearth, fire grate, air drift, coal-feeding door, ash door, chimney is characterized in that the structure of its combustion chamber is:

Fire grate is made of roll-type fire grate and tilting fire grate, the roll-type fire grate comprises a Heavenly Stems and Earthly Branches roll shaft as for, every roll shaft cylindrical is provided with intensive staggered some radially protruding teeth, be cast with ventilation slot by different angles on the roll shaft, wherein one to two roll shaft is arranged on the rear side of coal bank tube, this roll shaft is bearing in the axle bed of body of heater and can handles rotation outside stove, tilting fire grate is made of the some strip fire grates space certain interval that becomes a fixed inclination to place with burner hearth, this tilting fire grate one end bearing is in burner hearth sidewall, an end bearing in the burner hearth underframe and with roll-type fire grate adjacency.

2, the anti-coal storage formula combustion chamber of burning of individual layer that is applied to coal-burning boiler and stove as claimed in claim 1 is characterized in that: below the coal-feeding door of body of heater and tilting fire grate above antetheca be provided with air door.

3, the anti-coal storage formula combustion chamber of burning of individual layer that is applied to coal-burning boiler and stove as claimed in claim 1, it is characterized in that: when described combustion chamber was applied to industrial furnace, described water-cooled coal bank tube and building enclosure can change into used the refractory material body plan.