CN201488261U

CN201488261U - Thermal coal chambered circulation gas furnace

Info

Publication number: CN201488261U
Application number: CN2009202224069U
Authority: CN
Inventors: 武晓冬; 武岑
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-07
Filing date: 2009-09-07
Publication date: 2010-05-26
Anticipated expiration: 2019-09-07

Abstract

A thermal coal chambered circulation gas furnace comprises a drum, a hearth and an air blower, wherein the center of the hearth is provided with a main combustion chamber, a fire resistant fire grate is installed on the rear portion of the main combustion chamber, a gas combustion chamber and an auxiliary combustion chamber are respectively arranged on the upper portion and the lower portion of the fire resistant fire grate, the drum is arranged on the upper portion of a hearth water cooling wall, a hot air passage is arranged inside the drum, a fire wall is arranged inside the hearth, clearance is preserved between the fire wall and the hearth water cooling wall and forms a first water gas circulation passage, an air blow chamber is arranged on the lower portion of the drum, a self-weight door is arranged between the air blow chamber and the auxiliary combustion chamber, a steam water tank is installed inside the air blow chamber, a gas outlet is arranged at the bottom portion of the hot air passage and communicated with the air blow chamber to form a second water gas circulation passage, a coal storage bunker is arranged in the front portion of the main combustion chamber, and a screw conveyor is arranged at the bottom portion of the coal storage bunker. The thermal coal chambered circulation gas furnace adopts a three-chamber two-circulation structure and has high temperature, high thermal efficiency and less dust, thereby achieving purposes of energy saving, emission reduction and energy consumption reduction.

Description

Hot coal locellus circulation gas furnace

Technical field

The utility model relates to coal-burning boiler, particularly a kind of hot coal locellus circulation gas furnace.

Background technology

Existing coal-burning boiler generally has only a combustion chamber, temperature is lower, the thermal efficiency is low, abundant burning coal, the a large amount of fugitive constituents and the pernicious gas that produce in the coal burning process can enter in the atmosphere, contaminated environment, can produce a large amount of gangues and cinder behind the coal imperfect combustion, also be difficult to handle.

The utility model content

For addressing the above problem, the purpose of this utility model provides a kind of hot coal locellus circulation gas furnace, adopt the structure of three Room, two circulations, utilize burning of coal to produce steam, coal gas, send oxygen to reach the combustion process that coal burns gas, coal gas burning coal moves in circles by blower fan, temperature height, thermal efficiency height, ash are few, thereby reach energy-conservation, reduce discharging, the purpose of consumption reduction.

For achieving the above object, the utility model is by the following technical solutions:

A kind of hot coal locellus circulation gas furnace comprises drum, burner hearth, air blast; It is characterized in that: the center of burner hearth is provided with main chamber, the rear portion of main chamber is equipped with the fire-resistant fire grate of a profile of tooth, the top of fire-resistant fire grate is provided with the gas burner, the below of fire-resistant fire grate is provided with auxilliary combustion chamber, drum is arranged on the top of furnace wall cooling, be provided with the circuitous hot-air channel that turns round in the drum, the inlet of hot-air channel is communicated with the top of gas burner, and the outlet of hot-air channel is communicated with flue entrance; Position near water-cooling wall in burner hearth is provided with fire division wall, leave the space between fire division wall and the furnace wall cooling, this space constitutes water-gas first circulation canal, below drum, be provided with blast chamber, the discharge pipe of described air blast stretches in the blast chamber, be provided with the deadweight door between blast chamber and the auxilliary combustion chamber, the open type steam water tank is installed in blast chamber, steam water tank is close on the water-cooling wall of burner hearth, the bottom of described hot-air channel is provided with the gas outlet, this gas outlet is communicated with blast chamber, thereby constitutes water-gas second circulation canal; The front portion of main chamber is provided with coal store, and the bottom level of coal store is furnished with a plurality of augers, and these augers are connected with transmission device.

The top of described coal store is provided with and adds coal bunker.

The utility model has following actively useful effect:

Hot coal locellus circulation gas furnace of the present utility model, adopt the structure of three Room, two circulations, utilize burning of coal to produce steam, coal gas, send oxygen to reach the combustion process that coal burns gas, coal gas burning coal moves in circles by blower fan, utilize formed 1350 ℃ of-1500 ℃ of hot blasts of first, second circulation canal of water-gas that the water in the drum is heated up rapidly, the thermal efficiency is high.

Because the fire box temperature height can all burnout coal, even indivedual gangue also can burn, thereby wherein the charcoal of trace burnouts, so do not produce cinder, formed ash is less, therefore the coal heat utilization efficiency reaches best, compares the 30%-50% that can economize on coal with simple coal-fired stove.

Description of drawings

Fig. 1 is the structural representation of the utility model one embodiment.

Fig. 2 is the structural representation of fire-resistant fire grate.

Fig. 3 is an operation principle schematic diagram of the present utility model.

The specific embodiment

Number in the figure

1 drum, 2 burner hearths, 3 main chambers, 4 fire-resistant fire grates

5 gas burners, 6 auxilliary combustion chamber 7 water-cooling walls, 8 hot-air channels

9 inlets, 10 outlets, 11 flue entrances, 12 fire division walls

13 coal gas circulation canals, 14 air blasts, 15 blast chambers

16 deadweight doors, 17 steam water tanks, 18 discharge pipes

19 augers, 20 transmission devices, 21 gas outlets

22 coal stores 23 add coal bunker 24 storage tanks

25 feed pipes, 26 cleaning doors

Please refer to Fig. 1, Fig. 2, Fig. 3, the utility model is a kind of hot coal locellus circulation gas furnace, comprises drum 1, burner hearth 2 and air blast 14; The center of burner hearth 2 is provided with main chamber 3, the rear portion of main chamber 3 is equipped with the fire-resistant fire grate 4 of a profile of tooth, the top of fire-resistant fire grate 4 is provided with gas burner 5, the below of fire-resistant fire grate 4 is provided with auxilliary combustion chamber 6, drum 1 is arranged on the top of furnace wall cooling 7, be provided with the circuitous hot-air channel 8 that turns round in the drum 1, the inlet 9 of hot-air channel 8 is communicated with the top of gas burner 5, and the outlet 10 of hot-air channel 8 is communicated with flue entrance 11.

Position near water-cooling wall 7 in burner hearth 2 is provided with fire division wall 12, leave the space between fire division wall 12 and the furnace wall cooling 7, this space constitutes water-gas first circulation canal 13, below drum 1, be provided with blast chamber 15, the discharge pipe 18 of air blast 14 stretches in the blast chamber 15, be provided with deadweight door 16 between blast chamber 15 and the auxilliary combustion chamber 6, open type steam water tank 17 is installed in blast chamber 15, steam water tank 17 is close on the water-cooling wall 7 of burner hearth 2, and the outlet of steam water tank 17 is near the mouth of pipe of air blast discharge pipe 18.

The front portion of main chamber 3 is provided with coal store 22, and the bottom level of coal store 22 is furnished with a plurality of augers 19, and these augers 19 are connected with transmission device 20.Transmission device is made up of motor, decelerator, chain, sprocket wheel.

The bottom of hot-air channel 8 is provided with gas outlet 21, and this gas outlet 21 is communicated with blast chamber 15, thereby constitutes water-gas second circulation canal.

The top of coal store 22 is provided with and adds coal bunker 23, the outside that adds coal bunker 23 can be provided with feeder, coal falls into coal store 22 from adding coal bunker 23, the minor diameter auger 19 of coal store 22 bottoms is slowly delivered to the rear portion of burner hearth 2 with coal, at this moment under the drive of transmission device 20, the hot coal charcoal has burnt about 50%, after the coal particle diameter diminishes,, fall into auxilliary combustion chamber 6 and burn away by the fire-resistant fire grate 4 of profile of tooth.

Because auger 19 diameters are little, sustainable rotation, can not increase the amount of delivering coal, simultaneously the coal in the main chamber 3 is kept loosening, the increase gas permeability also travels forward, and makes it be difficult for bonding, uses chain drive can keep the stability of rotating, be equipped with on the auger 19 and stir leaf, stir the diameter of leaf and can suitably select according to type of furnace size.

Please refer to Fig. 2; the fire-resistant fire grate 4 of zigzag is made up of a plurality of fire bars; since the size between fire bars by little to big expansion; so when coal cinder travels forward; at first tiny carbon granule can fall; it is smooth and easy to guarantee to ventilate, and along with the fire bars size gap increases gradually, the live charcoal of big grain progressively falls into auxilliary coal-fired chamber 6 in the process of advancing.

Because the effect of pressure drop in furnace makes the hot blast in the burner hearth 2 circulate by water-gas first circulation canal 13, at this moment, begin to produce steam after 17 heat absorptions of open type steam water tank, steam just in time comes near the mouth of pipe place of discharge pipe 18 of air blast 14, after air blast 14 starts, its pneumatic power can be opened deadweight door 16, steam, oxygen are delivered in the auxilliary combustion chamber 6, produce semiwater gas with red-hot coal, semiwater gas upwards pours while burning in the gas burner 5, burns away in gas burner 5.Unburnt coal gas enters in water-gas first circulation canal 13 with hot blast, with the oxygen that air blast 14 is sent into, enters gas burner 5 once more after water vapour mixes and burns.

The high-temperature hot-air on 5 tops, gas burner enters hot-air channel 8, and drum 1 is heated, and the hot blast after the part cooling is derived from flue under the effect of air-introduced machine, and with Ash Water Separator, flue gas after being purified enters atmosphere after dehydration through wet method sulphur removing and dust removing equipment.

Parts such as hot-air channel 8 interior remaining coal gas, tar, phenol water enter in the blast chamber 15 from gas outlet 21 downwards, after the water vapour of open type steam water tank 17 generations mixes, enter auxilliary combustion chamber 6 once more after passing deadweight door 16, form water-gas second circulation canal simultaneously as shown in Figure 3.

Deadweight door 16 just can be opened by pneumatic power, can guarantee that residue vapor can not enter in the burner hearth 2 under the state of banking up a fire.Boiler is provided with attemperating unit, air blast 4 and the system of delivering coal can close automatically when leaving water temperature reaches setting value, because air blast 14 cuts out, deadweight door 16 has not had to fall to closing automatically after the pneumatic power of air blast, the steam that open type steam water tank 17 is produced can not enter the auxilliary combustion chamber 6 under the state of banking up a fire, there has not been steam, just can not produce a large amount of coal gas in the stove, make boiler safety the same under the state of banking up a fire with the ordinary combustion stove, and residue vapor can only upwards be discharged by flue, along with the reduction gradually of temperature in the stove, steam water tank 17 temperature also can reduce, and also just can not produce steam again.Air blast and feeder can automatically start and finish new one and take turns boiler heating work when temperature is reduced to the design temperature lower limit.

The outside at boiler can be provided with storage tank 24, and storage tank 24 is communicated with open type steam water tank 17 by feed pipe 25, in time supplies water to open type steam water tank 17.

Bottom in auxilliary combustion chamber 6 is provided with small-sized cleaning door 26, can manually regularly check deashing.Because combustion temperature in hearth can surpass the common metal smelting temperature, gangue can be burnt.Separately burning the thick coal seam of original plain cylindrical furnace 500-600mm in main and auxiliary combustion chamber, can not form coking or refining slag situation, and the ash amount is few, and most of ash is taken away by air inducing again, so deashing work is little, establishes small-sized cleaning door 26 and gets final product.

Please refer to Fig. 3, boiler of the present utility model, adopt three Room, two loop structures, the boiler center is a main chamber 3, when coal burning 50% left and right sides, assist combustion chamber 6 to falling into, form red-hot coal seam, produce water-gas after meeting water vapour, be provided with water-gas first circulation canal and water-gas second circulation canals in the burner hearth 2 and outside the burner hearth 2 respectively, utilize the burning of coal self-produced steam, self produced gas, sending oxygen and steam to reach coal by blower fan burns gas, the burning that coal gas burning coal moves in circles heats up burner hearth rapidly, form 1350 ℃ of-1500 ℃ of hot blasts the water in the drum is heated up rapidly, the thermal efficiency is high.

Because temperature height in the burner hearth can all burnout coal, wherein micro-charcoal is burnouted even indivedual gangue also can burn, so do not produce cinder, formed ash is less, so the coal heat utilization efficiency reaches best, compares the 30%-50% that can economize on coal with simple coal-fired stove.

Claims

1. a hot coal locellus circulation gas furnace comprises drum, burner hearth, air blast; It is characterized in that: the center of burner hearth is provided with main chamber, the rear portion of main chamber is equipped with the fire-resistant fire grate of a profile of tooth, the top of fire-resistant fire grate is provided with the gas burner, the below of fire-resistant fire grate is provided with auxilliary combustion chamber, drum is arranged on the top of furnace wall cooling, be provided with the circuitous hot-air channel that turns round in the drum, the inlet of hot-air channel is communicated with the top of gas burner, and the outlet of hot-air channel is communicated with flue entrance; Position near water-cooling wall in burner hearth is provided with fire division wall, leave the space between fire division wall and the furnace wall cooling, this space constitutes water-gas first circulation canal, below drum, be provided with blast chamber, the discharge pipe of described air blast stretches in the blast chamber, be provided with the deadweight door between blast chamber and the auxilliary combustion chamber, the open type steam water tank is installed in blast chamber, steam water tank is close on the water-cooling wall of burner hearth, the bottom of described hot-air channel is provided with the gas outlet, this gas outlet is communicated with blast chamber, thereby constitutes water-gas second circulation canal; The front portion of main chamber is provided with coal store, and the bottom level of coal store is furnished with a plurality of augers, and these augers are connected with transmission device.

2. hot coal locellus circulation gas furnace as claimed in claim 1, it is characterized in that: the top of described coal store is provided with and adds coal bunker.