CN103499193A

CN103499193A - Special hot blast furnace for drying shed

Info

Publication number: CN103499193A
Application number: CN201310481040.8A
Authority: CN
Inventors: 李菊泉
Original assignee: Individual
Current assignee: Sanming City Tong Shuo Machinery Manufacturing Co Ltd
Priority date: 2013-10-15
Filing date: 2013-10-15
Publication date: 2014-01-08
Anticipated expiration: 2033-10-15
Also published as: CN103499193B

Abstract

The invention relates to a special hot blast furnace for a drying shed. The top of a combustion chamber is an arch-shaped furnace top made of steel plates in a rolling mode; a left side plate, a right side plate, a front plate, a rear plate and a fire net are connected with the edge of the arch-shaped furnace top to form the combustion chamber; an ash box is arranged between the fire net and a base plate; firebrick furnace linings are built on the inner side which abuts against the left side plate, the right side plate, the front plate and the rear plate; a secondary air duct is arranged between the ash box and the combustion chamber; the upper portion of the rear plate of the combustion chamber is a fire outlet tube sheet connected with a finned tube exchanger; the finned tube exchanger is composed of at least three sets of small-bore finned tubes, wherein a plurality of small-bore finned tubes serve as each set, the finned tubes are arranged to be an upper layer, a middle layer and a lower layer through connecting boxes and are connected and communicated in sequence to form a high-temperature smoke gas flow path and two ports, the upper port is connected with the fire outlet tube sheet, and the lower port is connected with a smoke collecting box; a chimney is led out below the middle portion of the smoke collecting box. The special hot blast furnace is mainly used for baking bamboo and wood products and agricultural and sideline products in cooperation with the drying shed.

Description

The drying shed special hot air stove

Technical field

The present invention relates to a kind of drying equipment, especially a kind of energy consumption is low, bamboo and wood products's drying shed special hot air stove that temperature rise is fast.

Background technology

At present, although the supporting hot-blast stove kind of known and bamboo and wood products's drying shed is a lot, with regard to the direct combustion hotblast stove of supporting drying shed, its typical version has two kinds, a kind of hot-blast stove is to be rolled into steel plate the long cylinder of circular segment that a central angle equals greatly 180 o, front portion at this length cylinder is made as combustion chamber, an ash bucket is established in the below of combustion chamber, be provided with the flat grate grate between ash bucket and combustion chamber, the rear portion of the long cylinder of circular segment is the high-temperature flue gas delivery line, the rear end of this pipe connects with a simple tubulation radiator, this radiator is by two, or four thick steel pipes of maximum six roots of sensation form, one end of the top of tubulation radiator is established a chimney.The hot smoke gas flow of burner hearth through flue gas delivery line, tubulation radiator and chimney in-line arrangement to atmosphere; The high-temperature flue gas delivery line of the direct combustion hotblast stove of another kind of supporting drying shed and radiator part are with aforementioned basic identical, and different is to change the flat grate grate into trapezoidal fire grate.The defect of the direct combustion hotblast stove of above-mentioned supporting drying shed is, hot-blast stove tubulation fansink designs is simple and crude, the caliber of its radiating tube is thick, radiating efficiency is low, the space occupied is large, increased the windage of hot air circulation, heat up slow, energy consumption is high, the high-temperature flue gas delivery line be connected with burner hearth, be in the below of tubulation radiator, not only from ventilating fan away from, and due to the obstruct of the tubulation radiator that is subject to thick caliber, cause the air of low power ventilating fan input to be difficult to the high-temperature flue gas delivery line is dispelled the heat, cause it because of overheated scaling loss, greatly shortened the service life of hot-blast stove.

Summary of the invention

In order to overcome existing bamboo and wood products drying shed hot-blast stove, heat up slowly, energy consumption is high, and the defect that service life is short the invention provides a kind of drying shed hot-blast stove, and this hot-blast stove energy consumption is low, and temperature rise is fast, long service life.

The technical solution adopted for the present invention to solve the technical problems is: the drying shed special hot air stove consists of combustion chamber and finned tube exchanger, the top that it is characterized in that combustion chamber, to roll with steel plate the arch furnace roof formed, left plate, right plate that arch furnace roof edge connects, header board, rear plate and the network of fire form combustion chamber, between the network of fire and base plate, are ash bins; Build the refractory brick furnace lining by laying bricks or stones near the inboard of left plate, right plate, header board, rear plate, between ash bin and combustion chamber, be provided with secondary air channel, so that air is after cleaning door enters ash bin, portion of air will enter the top, combustion chamber through secondary air channel; The header board of combustion chamber is provided with fire door, cleaning door, and the top of rear plate is the crater tube sheet, connects finned tube exchanger; Finned tube exchanger is to be one group by many small-bore finned tubes, by the small-bore finned tube of at least three groups, be arranged in upper, middle and lower-ranking through connecting box, connect and connect successively, form a high-temperature flue gas circulation flow path, form two ports, upper port is connected with the crater tube sheet, and lower port is connected with the collection smoke box, and chimney is drawn from collecting below, smoke box middle part, under the guiding of air-introduced machine, high-temperature flue gas stream in burner hearth, from top to bottom pass through the upper, middle and lower-ranking finned tube exchanger successively, after arriving the collection smoke box, discharge from chimney, form the circulation of high-temperature flue gas stream downdraf; Establish strong blast volume axial-flow fan above finned tube exchanger and arch furnace roof, make the high-temperature part of this drying shed hot-blast stove all be in air quantity, the peaked zone of blast, make finned tube exchanger and arch furnace roof rapid heat dissipation, avoided the high temperature scaling loss; Left plate, right plate, header board, rear plate all are rolled into the arc bulged, and the inboard of plate is provided with reinforcement, to prevent it, because of the impact of being expanded with heat and contract with cold, damage the refractory brick furnace lining in combustion chamber.

The invention has the beneficial effects as follows, thermal effect is high, energy consumption is low, temperature rise is fast, owing to having adopted the circulation of high-temperature flue gas stream downdraf, make the high-temperature part of this drying shed special hot air stove all be in the peaked zone of air quantity, blast of axial flow blower, effectively avoided high-temperature part, overheated scaling loss, extended long service life.

The accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described

Fig. 1 is front view of the present invention.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is the C of Fig. 1---the C cutaway view

Fig. 4 is the D of Fig. 1---the D cutaway view

1. combustion chambers in figure, 2. arch furnace roof, 3. header board, 4. rear plate, 5. fire door, 6. cleaning door, 7. finned tubular radiator, 8. connecting box, 9. air-introduced machine, 10. crater tube sheet, 11. collection smoke boxes, 12. chimney, 13. secondary air channels, 14. refractory brick furnace linings, 15. left plate, 16. right plates, 17. axial flow blowers, 18. the network of fire, 19. ash bins, 20. base plates.

The specific embodiment

In Fig. 1, the drying shed special hot air stove comprises that combustion chamber (1) and finned tube exchanger (7) form, the top that it is characterized in that combustion chamber (1), it is the arch furnace roof (2) of making by roll of steel plate, left plate (15), right plate (16) that arch furnace roof (2) edge connects, header board (3), rear plate (4) and the network of fire (18) form combustion chamber (1), between the network of fire (18) and base plate (20), are ash bin (19), inboard near left plate (15), right plate (16), header board (3), rear plate (4) is built refractory brick furnace lining (14) by laying bricks or stones, between ash bin (19) and combustion chamber (1), be provided with secondary air channel (13), so that air is after cleaning door (6) enters ash bin (19), portion of air will enter top, combustion chamber (1) through secondary air channel (13), the header board (3) of combustion chamber (1) is provided with fire door (5), cleaning door (6), and the top of rear plate (4) is crater tube sheet (10), connects finned tube exchanger (7), finned tube exchanger (7) is to be one group by many small-bore finned tubes, by the small-bore finned tube of at least three groups, through connecting box (8), be arranged in, in, lower three layers, connect and connect successively, form a high-temperature flue gas circulation flow path, form two ports, upper port is connected with crater tube sheet (10), lower port is connected with collection smoke box (11), chimney (12) certainly collects below, smoke box (11) middle part and draws, under the guiding of air-introduced machine (9), high-temperature flue gas stream in burner hearth, from top to bottom pass through successively, in, lower three layers of finned tube exchanger (7), after arriving collection smoke box (11), from chimney (12), discharge, form the circulation of high-temperature flue gas stream downdraf, strong blast volume axial-flow fan (17) is established in top at finned tube exchanger (7) and arch furnace roof (2), make the high-temperature part of this drying shed hot-blast stove all be in air quantity, the peaked zone of blast, make finned tube exchanger (7) and arch furnace roof (2) rapid heat dissipation, avoided the high temperature scaling loss, left plate (15), right plate (16), header board (3), rear plate (4) all are rolled into the arc bulged, the inboard of plate is provided with reinforcement, to prevent it, because of the impact of being expanded with heat and contract with cold, damages the refractory brick furnace lining (14) in combustion chamber (1).

Claims

1. a drying shed special hot air stove, by combustion chamber and finned tube exchanger, formed, it is characterized in that: the top of combustion chamber, it is the arch furnace roof of making by roll of steel plate, the left plate, the right plate that with arch furnace roof edge, are connected, header board, rear plate and the network of fire form combustion chamber, between the network of fire and base plate, are ash bins; Build the refractory brick furnace lining by laying bricks or stones near the inboard of left plate, right plate, header board, rear plate, between ash bin and combustion chamber, be provided with secondary air channel, the header board of combustion chamber is provided with fire door, cleaning door, and the top of rear plate is the crater tube sheet, connects finned tube exchanger; Finned tube exchanger is to be one group by many small-bore finned tubes, by the small-bore finned tube of at least three groups, be arranged in upper, middle and lower-ranking through connecting box, connect and connect successively, form a high-temperature flue gas circulation flow path, form two ports, upper port is connected with the crater tube sheet, lower port is connected with the collection smoke box, and chimney is drawn from collecting below, smoke box middle part.

2. drying shed special hot air stove according to claim 1, is characterized in that: above finned tube exchanger and arch furnace roof, establish strong blast volume axial-flow fan.

3. drying shed special hot air stove according to claim 1, it is characterized in that: left plate, right plate, header board, rear plate all are rolled into the arc bulged, and the inboard of plate is provided with reinforcement.