CN209341577U

CN209341577U - Hot-blast stove

Info

Publication number: CN209341577U
Application number: CN201822085988.2U
Authority: CN
Inventors: 韩毅龙
Original assignee: HUANGSHAN BAIYUN MACHINERY CO Ltd
Current assignee: HUANGSHAN BAIYUN MACHINERY CO Ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2019-09-03
Anticipated expiration: 2028-12-11

Abstract

The utility model discloses a kind of hot-blast stoves, including inner tube, it encloses equipped with outer tube the outside of inner tube, intermediate tube is set between inner and outer tubes, the tubular area that inner tube and intermediate tube surround constitutes flue gas access, and the tubular area that the upper and lower ends of flue gas access are surrounded with stovepipe and combustion chamber, outer tube and intermediate tube respectively constitutes cold air passage, cold air passage is connected to environment cold wind, and the upper and lower side of the hot wind access of the segment dislocation of inner tube is connected to cold air passage, hot wind air supply tube respectively.Air in cold air passage flow to hot wind access after capable of being preheated, heat exchange is carried out with the tube wall of inner tube after the progress heat exchange of the tube wall of air and intermediate tube, the heat exchange area of air is significantly increased, and can not only significantly improve the thermal efficiency of hot-blast stove, and the loss of heat is greatly reduced.

Description

Hot-blast stove

Technical field

The utility model relates to tea machinery apparatus field, specially a kind of heating air is used as the hot wind of drying tea leaves Furnace.

Background technique

Drying tea leaves are one of important procedures of tealeaves production, are passed through drying tea leaves after generally being heated air by hot-blast stove Drying and processing is carried out to tealeaves in equipment.Existing hot-blast stove includes inner and outer tubes, outer tube be set in inner tube and the two it Between form the current path of annular, combuster is set at the tube bottom of inner tube, and the high-temperature flue gas of generation is from inner tube in combustion chamber Tube bottom is discharged to nozzle, and cold air carries out heat exchange with inner pipe wall from after the air inlet entrance of current path upper end, after heating Air be expelled in tea leaf drier by the gas outlet of current path lower end.The heat for the air being wherein heated will conduct To outer tube wall, the heat energy loss of hot-air is caused, causes the thermal efficiency of existing hot-blast stove low.And with outer tube temperature Rise, the temperature of outer tube is higher, if staff touches outer tube and will lead to personnel's scald.

Utility model content

The purpose of the utility model is to provide a kind of hot-blast stoves for improving heat utilization rate.

To achieve the goals above, the technical solution of use are as follows: a kind of hot-blast stove, including inner tube, the outside of inner tube, which is enclosed, to be set There is outer tube, intermediate tube is set between inner and outer tubes, the tubular area that inner tube and intermediate tube surround constitutes flue gas access, and flue gas is logical The tubular area that the upper and lower ends on road are surrounded with stovepipe and combustion chamber, outer tube and intermediate tube respectively constitutes cold air passage, Cold air passage is connected to environment cold wind, and the upper and lower side of the hot wind access of the segment dislocation of inner tube is sent with cold air passage, hot wind respectively Air hose connection.

Compared with prior art, the technical effect of the utility model are as follows: the air in cold air passage flows after capable of being preheated To hot wind access, heat exchange, the heat exchange of air are carried out with the tube wall of inner tube after the tube wall progress heat exchange of air and intermediate tube Area is significantly increased, and can not only significantly improve the thermal efficiency of hot-blast stove, and the loss of heat is greatly reduced.

Detailed description of the invention

Fig. 1 is the cross-sectional view of the utility model；

Fig. 2 is the enlarged diagram of structure at M in Fig. 1；

Fig. 3 is A-A cross-sectional view in Fig. 1.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawing, single tail hollow arrow is the stream of air in attached drawing Dynamic direction, double tail hollow arrows are the flow direction of flue gas.

A kind of hot-blast stove, including inner tube 10, the outside of inner tube 10 are enclosed equipped with outer tube 20, are arranged between inner tube 10 and outer tube 20 The tubular area that intermediate tube 30, inner tube 10 and intermediate tube 30 surround constitutes flue gas access 1, the upper and lower ends difference of flue gas access 1 It is connected to stovepipe 11 and combustion chamber 80, the tubular area that outer tube 20 and intermediate tube 30 surround constitutes cold air passage 2, cold air passage 2 are connected to environment cold wind, the upper and lower side of the hot wind access 3 of the segment dislocation of inner tube 10 respectively with cold air passage 1, hot wind air supply tube 50 connections.

In above scheme, as shown in Figure 1, what the high-temperature flue gas generated in combustion chamber 80 was surrounded from inner tube 10 and intermediate tube 30 Flue gas access 1 flows up, and cold air enters from the cold air passage 2 that outer tube 20 and intermediate tube 30 surround, and cold air is logical from cold wind Road 2 flows into the hot wind access 3 of the segment dislocation of inner tube 10, and hot-air Self-air-heating air supply tube 50 is expelled in drying equipment.

It is into the cold air in cold air passage 2 by the flue gas heat exchange in 30 tube wall of intermediate tube and flue gas access 1, i.e., cold Cold air in wind access 2 is flow in hot wind access 3 again after being first preheated, and the air in hot wind access 3 passes through the pipe of inner tube 10 For wall again with the flue gas heat exchange in flue gas access 1, such heat exchange area is the area and 10 tube wall area of inner tube of intermediate tube wall The sum of, compared to traditional hot-blast stove, the area that heat exchange can be carried out with air increases by 2 times, the quick heating of cold air, and The cold air passage 2 of outer layer is arranged, and reduces the loss of heat, can significantly improve the thermal efficiency of hot-blast stove.In addition, normal in room temperature Pressure, the tube wall temperature of outer tube will be maintained between 30 DEG C to 40 DEG C, even if staff touch outer tube 20 will not be by Scald.

Since flue gas access 1 is arranged in the periphery of combustion chamber 80, this more difficulty that results in igniting in combustion chamber 80, inside The middle part of pipe 10 is disposed with core pipe 40, and 40 upper and lower side of core pipe is connected to stovepipe 11 and combustion chamber 80 respectively.On the one hand, few When amount faggot is ignited in economizer, flue gas is discharged into chimney through core pipe 40, and air is along on 40 lumen of core pipe for having vertical space It rises, the convection current of air can be reinforced in this way, the faggot in combustion chamber 80 can be ignited rapidly；On the other hand, core pipe 40 is set It sets, the heat exchange area of air and flue gas will be further increased, further increase the heating rate of cold air.

As shown in Fig. 2, the high-temperature flue gas generated in combustion chamber 80 is as often as possible flow in flue gas access 1, to ensure sky Gas can rapidly heat up, and the minor diameter through-hole 42 opened up on the upper head plate 41 of core pipe 40 is connected to stovepipe 11, reduce in this way Flue gas is flowed out from core pipe 40.

It is below the specific connectivity scheme of hot and cold wind access 2,3, said inner tube 10 includes cylinder pipeline section 12, cylinder pipeline section 12 lower ends are connected with bottom plate 14, are conical 13 transition of pipeline section connection between upper end tube nozzle and stovepipe 11, and conduction pipe 60 runs through The conical pipeline section 13 of inner tube 10 and the conical pipeline section of intermediate tube 30 are simultaneously connected to hot and cold wind access 2,3.

The conduction pipe 60 is disposed at least two along the circumferential uniform intervals of inner tube 10, makes in cold air passage 2 in this way Air can be uniformly flowed into hot wind access 3, it is ensured that air can be heated evenly.

As shown in figure 3, outer tube 20 includes the cylinder pipeline section being sequentially arranged from bottom to top, taper pipeline section, the cylinder of outer tube 20 Pipeline section lower part is connected with blast pipe 21, and 21 both ends of blast pipe are connected to environment cold wind and cold air passage 1 respectively, the air inlet of blast pipe 21 Direction is consistent with the tangential direction of 20 tube wall of outer tube at the air inlet, and air can rotate rising, prevents far from blast pipe 21 1 Heat on 30 tube wall of intermediate tube of side is difficult to conduct to air, not only improves the thermal efficiency of hot-blast stove, but also rotate rising Air can be heated more uniformly.

Claims

1. a kind of hot-blast stove, including inner tube (10), the outside of inner tube (10) are enclosed equipped with outer tube (20), it is characterised in that: inner tube (10) intermediate tube (30) are set between outer tube (20), inner tube (10) constitutes flue gas with the tubular area that intermediate tube (30) surround and leads to Road (1), the upper and lower ends of flue gas access (1) are connected to stovepipe (11) and combustion chamber (80) respectively, outer tube (20) and intermediate tube (30) tubular area surrounded constitutes cold air passage (2), and cold air passage (2) is connected to environment cold wind, the lumen shape of inner tube (10) At the upper and lower side of hot wind access (3) be connected to respectively with cold air passage (2), hot wind air supply tube (50).

2. hot-blast stove according to claim 1, it is characterised in that: core pipe (40) are disposed in the middle part of said inner tube (10), Core pipe (40) upper and lower side is connected to stovepipe (11) and combustion chamber (80) respectively.

3. hot-blast stove according to claim 2, it is characterised in that: opened up on the upper head plate (41) of the core pipe (40) small Diameter through hole (42) is connected to stovepipe (11).

4. hot-blast stove according to claim 1 or 2, it is characterised in that: said inner tube (10) includes cylinder pipeline section (12), circle Column tube section (12) lower end is connected with bottom plate (14), is that (13) transition of conical pipeline section connects between upper end tube nozzle and stovepipe (11) Connect, conduction pipe (60) through inner tube (10) conical pipeline section (13) and the conical pipeline section of intermediate tube (30) and be connected to hot and cold Wind access (2,3).

5. hot-blast stove according to claim 4, it is characterised in that: the conduction pipe (60) is along the circumferential uniform of inner tube (10) Arranged for interval has at least two.

6. hot-blast stove according to claim 1, it is characterised in that: outer tube (20) includes the cylinder being sequentially arranged from bottom to top Pipeline section, taper pipeline section, the cylinder pipeline section lower part of outer tube (20) are connected with blast pipe (21), and blast pipe (21) both ends are cold with environment respectively Wind is connected to cold air passage (2), the airintake direction of blast pipe (21) and the tangential direction one of outer tube (20) tube wall at the air inlet It causes.