CN201032340Y - Horizontal blow type tobacco hot-blast stove - Google Patents

Abstract

The utility model relates to an air heating furnace with horizontal pressure-type used for roasting tobacco, which comprises a heat exchanging chamber, a heating furnace arranged inside the heat exchanging chamber and a heat exchanger (15). A furnace body (8) of the heating furnace is placed on stilts by a support leg (3); the upper part inside the furnace body is a hearth (9) and the lower part is an ash and slag chamber (2); a furnace bar is arranged between the hearth (9) and the ash and slag chamber (2); a coal filling mouth is arranged at the front upper part of the hearth and a tuyere (5) is arranged at the front lower part of the hearth; the rear tail part of the hearth is connected with a section of upward reburning chamber (11); a flue gas exit at the top of the reburning chamber (11) is communicated with a flue gas entrance at the top of a vertical settling chamber (1); a flue gas exit at the top of the settling chamber (1) is communicated with a flue gas entrance at the top of the heat exchanger (15); a secondary air pipe (10) is arranged at the side wall of the reburning chamber (11). The utility model can enlarge heat exchanging area, improve heat exchanging efficiency and reduce environmental pollution, for soot emission is little.

Description

The transverse-blow type hot blast stove for flue-cured tobacco

Technical field

The utility model relates to the flue-cured tobacco technical field, especially a kind of transverse-blow type hot blast stove for flue-cured tobacco.

Background technology

The hot blast stove for flue-cured tobacco of traditional approach is an air intake under the fire grate, combustion air directly passes fire grate and blows to the coal seam, because operation has the irregular phenomenon of coal seam thickness often, easily cause the part coal grain can not after-flame during burning, or parts of fine coal dust and carbon dust take away with flue gas, or be wrapped in and cause the carbon residue loss in the slag; Simultaneously the part fuel gas also easily lack because of the time of staying in burner hearth or oxygen is not enough can not after-flame, be discharged to flue gas at last and cause loss of the inadequacy burning for chemistry mechanics reason in the atmosphere.In a word, more than various incomplete combustion losses not only wasted fuel, reduced the thermal efficiency of stove, and the fuel gas taken out of of smoke evacuation and the flying dust that contains carbon granules have caused environmental pollution.In addition, because combustion space is limited, need often coal in stove in the flue-cured tobacco heat supplying process, tobacco grower's labour intensity is bigger.

The utility model content

In order to solve above-mentioned existing problems, the utility model provides a kind of transverse-blow type hot blast stove for flue-cured tobacco, to improve the efficiency of combustion of heating furnace, reduces flue dust and fuel gas discharge capacity, reduces environmental pollution, reduces the labour intensity that the coal number of times reduces the tobacco grower simultaneously.

The technical solution of the utility model is: a kind of transverse-blow type hot blast stove for flue-cured tobacco, comprise heating furnace and the heat exchanger installed in Heat Room and the Heat Room, the sidewall of the tobacco flue-curing house side of Heat Room is provided with the air outlet at top and the return air inlet of bottom, the body of heater of heating furnace is laid by supporting leg is built on stilts, the body of heater internal upper part is a burner hearth, the bottom is a cinder chamber, be provided with fire grate between burner hearth and the cinder chamber, coal filling hole is arranged on the front upper part of burner hearth, blast orifice is arranged on the preceding bottom of burner hearth, the back lower tail of burner hearth is connected with one section burning chamber that makes progress, the exhanst gas outlet at burning chamber top is communicated with the smoke inlet at a vertical expansion chamber top, the exhanst gas outlet at expansion chamber top is communicated with the smoke inlet of heat exchanger, and the sidewall of burning chamber is provided with secondary air channel.

The top board of described expansion chamber is provided with a deflection plate, and deflection plate is between the exhanst gas outlet and smoke inlet of expansion chamber, makes and forms U type baffling flue in the expansion chamber.

Described fire grate is for shaking fire grate, shakes fire grate and shakes handle by its turning cylinder and and link to each other.

The height of the return air inlet upper edge of Heat Room bottom is not higher than the height of body of heater bottom surface.

Heat exchanger is made of the flue gas header at horizontal pipe and two ends, a flue gas header is provided with smoke inlet, another is provided with exhanst gas outlet and chimney links, and chimney passes the top board of Heat Room, and a shoot door and a shoot door also are set respectively on the flue gas header of two ends.

In the air outlet of Heat Room ventilating fan is installed.

Described body of heater is welded by steel plate.

The obtained effect of the utility model is as follows:

1) thoroughly is different from the traditional approach of air intake under the fire grate, change into from the above air blast of fire grate, realized the burning of transverse-blow type semi-coal gas, impel carbon, the carbon granules in the flue gas, tar, fuel gas in the coal that enough time and temperature after-flame are arranged, improved efficiency of combustion greatly, energy-saving effect is obvious;

2) heating furnace of same heating demand has increased the combustion space and the degree of depth, and enough combustion spaces both are provided, and has the coal bunker function again, can keep burning in 7 hours for about 110 kilograms by a coal, has reduced tobacco grower's workload, can be beautiful with the automatic stoking ratio;

3) except that conventional burner hearth, increased independently burning chamber and secondary air channel, adopted the secondary wind eddies stream to burn technology, guaranteed the completing combustion of fuel gas and carbon granules in the flue gas, also almost there is the flue dust discharging even burn bituminous coal, improved environment greatly;

4) in burning chamber's outlet, increase the baffling expansion chamber, in minute separable flue gas, in the flying dust, also increased heat exchange area, improved heat exchange efficiency.

Description of drawings

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

Fig. 2 is the A-A cutaway view of Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing, structure of the present utility model is further described.

As shown in Fig. 1,2, the utility model mainly comprises the heat-exchange system that the circulating fan 17 at the heat exchanger 15 on heating system, top of bottom and top is formed.Heating system by body of heater 8, coal filling hole 7, blast orifice 5, breast hole 4, cinder chamber 2, brick heating furnace supporting seat 3, burner hearth 9, by high, medium and low temperature three part fire grates form shake fire grate 6, shake fire grate handle 23, critical piece such as secondary air channel 10, burning chamber 11, flying dust expansion chamber 1 forms.The outer wall of this hot-blast stove is formed by brick three exterior walls 22 building, concrete roof 18 and with the shared partition wall 20 of tobacco flue-curing house.The coal filling hole 7 of heating furnace, blast orifice 5, breast hole 4 are located at wherein exterior wall 22 places; Body of heater 8 supports built on stilts laying by brick heating furnace supporting leg 3, body of heater 8 is welded by the thick steel plate of 3mm, the partition wall of hot-blast stove and tobacco flue-curing house is provided with the air outlet 21 at top and the return air inlet 19 of bottom, body of heater 8 internal upper parts are burner hearth 9, the bottom is a cinder chamber 2, be provided with fire grate 6 between burner hearth 9 and the cinder chamber 2, the coal filling hole 7 of burner hearth is arranged on front upper part, the blast orifice 5 of burner hearth is arranged on front middle part, the rear lower of burner hearth is connected with one section burning chamber that makes progress 11, the exhanst gas outlet at burning chamber 11 tops is communicated with the smoke inlet at vertical expansion chamber 1 top, the exhanst gas outlet at expansion chamber 1 top is communicated with the smoke inlet of heat exchanger 15, and the sidewall of burning chamber 11 is provided with secondary air channel 10.The top board of expansion chamber 1 is provided with a deflection plate 30, and deflection plate is between the exhanst gas outlet and smoke inlet of expansion chamber 1, makes and forms U type baffling flue in the expansion chamber 1.

Above-mentioned fire grate 6 shakes fire grate for what high, medium and low temperature three parts were formed, shakes fire grate and shakes handle 23 by its turning cylinder and and link.The upper edge height of the return air inlet 19 of hot-blast stove bottom is not higher than the height of body of heater 8 bottom surfaces.Heat exchanger 15 is made of the flue gas header at horizontal pipe and two ends, a flue gas header is provided with smoke inlet, another is provided with exhanst gas outlet and chimney 16 links, and chimney 16 passes the top board 18 of hot-blast stove, and a shoot door 13 and a shoot door 14 also are set respectively on the flue gas header of two ends.In the air outlet 21 of hot-blast stove circulating fan 17 is installed.

Operation principle:

The heating furnace of this hot-blast stove has adopted the transversal ventilation combustion system, is equivalent to semi-gas furnace.The air that laterally is blown into by blast orifice 5 places enters burner hearth 9, because thicker along the air-flow direction coal seam, so the sufficient combustion of carbon, furnace temperature is higher, carbon granules in the flue gas, tar and fuel gas can be cleaved by fervid fuel bed the time, burning, obviously improved efficiency of combustion; Simultaneously, when the coal gas that produces in burner hearth passes through burning chamber, owing to be provided with secondary air channel 10, import an amount of auxiliary air by airduct, can realize the abundant mixing of semi-coal gas and remaining carbon granules and air and then reach completing combustion, produce the secondary high-temperature region, further improve the thermal efficiency of heating furnace; Have body of heater 8, the burning chamber 11 of the fire-resistant furnace wall of thin-walled, the surface of expansion chamber 1 all participates in heat exchange, thereby increased heat exchange area, improved heat exchange efficiency.The secondary high-temperature region can significantly reduce loss of the inadequacy burning for chemistry mechanics reason in the flue gas and the loss of flying dust carbon residue, and the black smoke discharging of thoroughly having eliminated contaminated environment and having wasted energy has very big meaning to environmental protection; After hot flue gas baffling is gone into expansion chamber 1, can make the flying dust in the flue gas lean on the Gravity Separation sedimentation at this, obviously reduced the fly ash content in the smoke evacuation, substantially eliminated black smoke, hot then flue gas enters heat exchanger 15 by pipeline, by heat exchange the air in the hot-blast stove is heated, that continues imports tobacco flue-curing house by two circulating fans 17 with hot-air, this heat exchanger 15 not only has higher heat exchange efficiency, and be provided with easy to operate shoot door 13,14, efficiently solve a difficult problem that makes the reduction of heat exchanger 15 heat transfer efficiencys, line clogging because of the long-time running dust stratification; In addition, also design the furnace bottom air channel, under the prerequisite that does not increase investment, made full use of the furnace bottom heat exchange, further improved the heat exchange efficiency of hot-blast stove.Circulating fan 17 can make a certain amount of hot-air input tobacco flue-curing house remove baking tobacco leaves, make again simultaneously in the tobacco flue-curing house and turn back to hot-blast stove by return air inlet through the humid air after the moisture absorption cooling, be heated output by heating furnace and heat exchanger once more, so move in circles, finish the production and the conveying function of hot-air.

In the utility model when work,, combustion-supporting required air is laterally sent in the stove from blast orifice 5 by air blast, contacts with fully mixing than high seam along journey; New coal can add burner hearth 9 by coal filling hole 7 disposable batches, and this burner hearth both provided enough combustion spaces, had the coal bunker function again; Coal combustion produces in burner hearth 9 high-temperature flue gas and coal gas at first enter burning chamber 11, coal gas fully mixes to burn with the secondary wind that enters from secondary air channel 10 in burning chamber 11 and becomes high-temperature flue gas, high-temperature flue gas separates grit wherein by flying dust expansion chamber 1 and conducts heat to outside air then, and the smoke outlet tube 12 by the expansion chamber top enters heat exchanger 15 at last.The high-temperature flue gas that heating furnace produces is passed to heat the circulating air that flows from bottom to top by heat exchanger 15 outer walls, by two circulating fans 17 hot blast is sent into tobacco flue-curing house by air outlet 21, and cooling becomes the wet air return air inlet 19 by partition wall 20 bottoms and comes back to hot-blast stove and circulated by heating once more in the tobacco flue-curing house.

The utility model can shake fire grate 6 after every operation a period of time, and ashes and lime-ash are fallen in the cinder chamber 2, removes from breast hole 4; In addition, can regularly open shoot door 13,14, the dust stratification in the heat exchanger 15 is removed; Also can open the shoot door removing dust stratification wherein of expansion chamber 1 bottom in case of necessity.

Claims (7)

1. transverse-blow type hot blast stove for flue-cured tobacco, comprise heating furnace and the heat exchanger (15) installed in Heat Room and the Heat Room, the sidewall of the tobacco flue-curing house side of Heat Room is provided with the air outlet (21) at top and the return air inlet (19) of bottom, it is characterized in that: the body of heater of heating furnace (8) is laid by supporting leg (3) is built on stilts, body of heater (8) internal upper part is burner hearth (9), the bottom is cinder chamber (2), be provided with fire grate (6) between burner hearth (9) and the cinder chamber (2), coal filling hole (7) is arranged on the front upper part of burner hearth, blast orifice (5) is arranged on the preceding bottom of burner hearth, the back lower tail of burner hearth is connected with one section burning chamber that makes progress (11), the exhanst gas outlet at burning chamber (11) top is communicated with the smoke inlet at vertical expansion chamber (a 1) top, the exhanst gas outlet at expansion chamber (1) top is communicated with the smoke inlet of heat exchanger (15), and the sidewall of burning chamber (11) is provided with secondary air channel (10).

2. transverse-blow type hot blast stove for flue-cured tobacco according to claim 1, it is characterized in that: the top board of described expansion chamber (1) is provided with a deflection plate (30), deflection plate is between the exhanst gas outlet and smoke inlet of expansion chamber (1), makes and forms U type baffling flue in the expansion chamber (1).

3. transverse-blow type hot blast stove for flue-cured tobacco according to claim 1 and 2 is characterized in that: described fire grate (6) is for shaking fire grate (6), shakes fire grate (6) and shakes handle (23) by its turning cylinder and and link to each other.

4. transverse-blow type hot blast stove for flue-cured tobacco according to claim 3 is characterized in that: the height of return air inlet (19) upper edge of Heat Room bottom is not higher than the height of body of heater (8) bottom surface.

5. transverse-blow type hot blast stove for flue-cured tobacco according to claim 4, it is characterized in that: heat exchanger (15) is made of the flue gas header at horizontal pipe and two ends, a flue gas header is provided with smoke inlet, another is provided with exhanst gas outlet and chimney (16) links, chimney (16) passes the top board (18) of Heat Room, and a shoot door (13) and a shoot door (14) also are set respectively on the flue gas header of two ends.

6. transverse-blow type hot blast stove for flue-cured tobacco according to claim 5 is characterized in that: ventilating fan (17) is installed in the air outlet of Heat Room (21).

7. transverse-blow type hot blast stove for flue-cured tobacco according to claim 6 is characterized in that: described body of heater (8) is welded by steel plate.

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