CN2929610Y

CN2929610Y - Direct heat exchange type coal burning hot blast stove

Info

Publication number: CN2929610Y
Application number: CNU2006201184412U
Authority: CN
Inventors: 马峰然
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-08
Filing date: 2006-06-08
Publication date: 2007-08-01
Anticipated expiration: 2016-06-08

Abstract

A direct heat exchanging coal-burning hot-air furnace, wherein a vertical container and a heat exchanger are equipped inside the shell body, a coal adding gate is equipped on a side wall of the container bottom, a stoker is equipped on the container bottom, a dust collecting bucket is equipped on the stoker bottom, a flue gas outlet on top of the container is connected with a heat exchanging inlet, a heat exchanging outlet is connected with a wind bringing device, a wind inlet is equipped on the shell body near the heat exchanger, a wind outlet is equipped on the shell body one the side near the container, the wind outlet is connected with the wind bringing device, a guiding mask is equipped outside the container, the gap between the guiding mask and the container forms an air passage, the upper portion of the air passage is communicated with the inner chamber of the shell body, the lower portion of the air passage is communicated with the wind outlet, and fins are welded on outer walls of the container. The container directly fuels coals, heats the air and supplies hot smoke gas to the heat exchanger, with a easy supplement and exhaustion of the air, the structure of the container is simple with a easy maintenance and a random starting, quick heating, safety and reliability, which can supply hot wind to the drying device or be used for workshop heating.

Description

Direct heat exchange coal hot air furnace

Technical field

The utility model relates to the coal-fired furnace field, particularly a kind of stove that pure hot blast is provided for roasting plants such as combined padding and drying system, drying baker, heating clambers.

Background technology

In industrial production, as combined padding and drying system, drying baker, roasting plants such as heating clamber need use hot blast endlessly, the scheme of prior art is: adopt boiler heat supplying, boiler is hot-water boiler or hot oil boiler, heat-conducting work medium is water or oil, water after the heating, oil or steam are transported in the roasting plant by pipeline and dispel the heat, hot blast is provided, its deficiency is: with water, oil, steam is that heat-conducting work medium is heated by boiler, and heat-conducting work medium itself will circulate in closed pipeline, starts slow, intermediate links are many, thermal losses is big, and it is slow to heat up, to the requirement height of boiler, replenishing and the discharging trouble of heat-conducting work medium, regular maintenance expense height, maintenance is inconvenient, jet chimney, there is hidden peril of explosion in pressurised boiler.In the boiler combustion coal heating heat-conducting work medium process, the hot flue gas of generation is directly discharged from smoke pipe, causes a part of thermal loss, and boiler thermal output is low.

The utility model content

In order to address the above problem, the purpose of this utility model provides a kind of direct heat exchange coal hot air furnace, and the direct burning coal of flue adds hot-air, provide hot flue gas to heat exchanger, heat-conducting work medium is an air, replenishes and discharges easily, and flue tube structure is simple, installation and maintenance are easy, with using with startup, quick heating, safe and reliable.

The purpose of this utility model is achieved in that a kind of direct heat exchange coal hot air furnace, comprise housing, vertical flue and heat exchanger are housed in the housing, on the lower sides of flue coal filling hole is arranged, fire grate is arranged at the bottom of flue, there is flue-dust retainer the below of fire grate, the exhanst gas outlet at flue top links to each other with the inlet of heat exchanger, the outlet of heat exchanger is connected with blower unit, near on the housing wall of heat exchanger one side air inlet is arranged, near on the housing wall of flue one side air outlet is arranged, air outlet is connected with blower unit.

Kuppe is equipped with in the described flue outside, and the space between kuppe and the flue forms gas flow, and the upper end of this gas flow is communicated with the inner chamber of housing, and the lower end of this gas flow is communicated with described air outlet.

The outer wall of described flue is welded with fin.

Described heat exchanger is made up of many vertical tubes, and the top of each vertical tube all is communicated with last tube connector, and the bottom of each vertical tube all is communicated with following tube connector.

Described heat exchanger is made of a spirality pipe.

Described housing is made of inside and outside steel plate layer therebetween muck cotton.

The utility model has following actively useful effect:

Heat exchanger does not need to make water, the wet goods heat-conducting work medium, directly-heated links to each other with the hot exhanst gas outlet of flue, and flue is a hollow cavity, and its inside does not need the device that adds hot water or oil, designs simplification, installation and maintenance are easy, and the direct burning coal of flue adds hot-air, provide hot flue gas to heat exchanger, hot flue gas is discharged discharged most of heat in heat exchanger tube after, has made full use of the heat of coal burning, and heat-conducting work medium is an air, replenish easily, directly discharging, with using with startup, heat-conducting work medium itself need not circulate in closed pipeline, intermediate links have been reduced, reduced thermal losses, quick heating, flue promptly are thermals source, itself has played the effect of heat exchange again, the outer wall of flue has fin, has increased heat exchange area, thermal efficiency height.The mutual reverse flow of cold wind that hot flue gas in the heat exchanger and heat exchanger are outer, heat exchange is abundant.After cold wind is once heated by heat exchanger, during through the gas flow between kuppe and the flue, become hot blast by post bake, hot blast can be supplied with various roasting plants and use, and heating is used between also can buying car in installments.

Description of drawings

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

Fig. 2 is the A-A echelon sectional view of Fig. 1.

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

Fig. 4 is the enlarged drawing of the C part of Fig. 1.

Fig. 5 is the structural representation of the utility model embodiment two.

Fig. 6 is the D-D cutaway view of Fig. 5.

The specific embodiment

Accompanying drawing number

1. steel plate layer 102. outer steel plate layer 103. rock wool in the housing 101.

2. kuppe 3. fins 4. flues 5. coal filling holes

6. fire grate 7. air outlets 8. flue-dust retainers 9. supporting legs

10. export 11. air inlets, 12. heat exchangers, 121. vertical tubes

122. 123. times tube connectors of last tube connector, 13. inlets, 14. blower units

15. blower unit 16. coals 17. flames 18. gas flows

Embodiment one: please refer to Fig. 1, Fig. 2, Fig. 3, the utility model is a kind of direct heat exchange coal hot air furnace, comprise housing 1, vertical flue 4 and heat exchanger 12 are housed in the housing 1, flue 4 can be made by steel plate, coal filling hole 5 is arranged on the lower sides of flue 4, fire grate 6 is arranged at the bottom of flue 4, there is flue-dust retainer 8 below of fire grate 6, the exhanst gas outlet at flue 4 tops directly links to each other with the inlet 13 of heat exchanger 12, the outlet 10 of heat exchanger 12 is connected with blower unit 15, and blower unit 15 can adopt air-introduced machine, and its effect is that the useless flue gas of heat exchanger 12 outlets is discharged.Blower unit 15 has also played the effect of negative pressure source, and the hot-air in the flue 4 is entered in the heat exchanger 12, and cool ambient air is replenished endlessly and entered in the flue 4.Heat exchanger 12 is with pipe heat exchanger, and heat exchanger 12 is made up of many vertical tubes 121, and the top of each vertical tube 121 all is communicated with last tube connector 122, and the bottom of each vertical tube 121 all is communicated with following tube connector 123.

Near on the housing wall of heat exchanger 12 1 sides air inlet 11 is arranged, near on the housing wall of flue 4 one sides air outlet 7 is arranged, kuppe 2 is equipped with in flue 4 outsides, space between kuppe 2 and the flue 4 forms gas flow 18, the upper end of this gas flow 18 is communicated with the inner chamber of housing 1, and the lower end of this gas flow 18 is communicated with air outlet 7.Blower unit 14 is equipped with in the outside of air outlet 7.Blower unit 14 can adopt air-introduced machine, and its effect is to be drawn by the hot blast after flue 4 heating, to supply with roasting plant and use.Also can be used for the workshop heating.Blower unit 14 also plays the effect of pressure source, and cold wind is entered from the air inlet 11 on the housing wall, flows in the inner chamber of housing 1, passes through the gas flow 18 between kuppe 2 and the flue 4 then, discharges from air outlet 7.

Please refer to Fig. 4, housing 1 is made of interior steel plate layer 101, outer steel plate layer 102 and rock wool 103, and rock wool 103 is installed in the middle of interior steel plate layer 101, the outer steel plate layer 102.103 insulation effects of rock wool.

In flue 4, add coal 16 by coal filling hole 5, coal 16 is in fire grate 6 internal combustion, a part of heat that flame 17 produces sheds from flue 4 outer walls with radiation and conduction pattern, all the other heats are taken away by hot flue gas, hot flue gas enters the pipeline of heat exchanger 12 from the inlet 13 of heat exchanger 12, discharged by the outlet 10 of heat exchanger 12 after having discharged most of heat, the heat that coal 16 burnings discharge is replenished to divide to be utilized.Cold wind is entered by the air inlet on the housing wall 11, when flowing through the outer wall of heat exchanger 12, once heated by heat exchanger 12, and the mutual reverse flow of cold wind outside hot flue gas in the heat exchanger 12 and the heat exchanger 12, heat exchange is abundant.When the gas flow 18 of the hot blast after the heating between kuppe 2 and flue 4 passed, by the outer wall post bake of flue 4, the hot blast after the post bake was drawn by blower unit 14, supplied with roasting plant and used, and also can be used for the workshop heating.During enforcement, can also can play the effect of pressure source at the air inlet 11 anterior air blasts of installing of housing, in preferred embodiments, the outer wall of flue 4 has been welded with the fin 3 of thermolysis.Fin 3 can be made of the fritter steel disc, also can be the strip steel plate, and fin 3 can strengthen the heat exchange effect of flue 4.

Embodiment two: please refer to Fig. 5, Fig. 6, heat exchanger 12 also can be made of a spiral pipeline.Hot flue gas flows when changing direction in the pipeline of heat exchanger 12, can not run into the bending dead angle, is difficult for dust stratification in the pipeline.Heat exchanger 12 also can be made of the pipeline of a circuitous coiling, also can play the effect of same not dust stratification.The operation principle of present embodiment is same as the previously described embodiments.

Claims

1. direct heat exchange coal hot air furnace, comprise housing (1), it is characterized in that: vertical flue (4) and heat exchanger (12) are housed in the housing (1), coal filling hole (5) is arranged on the lower sides of flue (4), fire grate (6) is arranged at the bottom of flue (4), there is flue-dust retainer (8) below of fire grate (6), the exhanst gas outlet at flue (4) top links to each other with the inlet (13) of heat exchanger (12), the outlet (10) of heat exchanger (1 2) is connected with blower unit (15), near on the housing wall of heat exchanger (12) one sides air inlet (11) is arranged, near on the housing wall of flue (4) one sides air outlet (7) is arranged, air outlet (7) is connected with blower unit (14).

2. direct heat exchange coal hot air furnace as claimed in claim 1, it is characterized in that: kuppe (2) is equipped with in described flue (4) outside, space between kuppe (2) and the flue (4) forms gas flow (18), the upper end of this gas flow (18) is communicated with the inner chamber of housing (1), and the lower end of this gas flow (18) is communicated with described air outlet (7).

3. direct heat exchange coal hot air furnace as claimed in claim 1 is characterized in that: the outer wall of described flue (4) is welded with fin (3).

4. direct heat exchange coal hot air furnace as claimed in claim 1, it is characterized in that: described heat exchanger (12) is made up of many vertical tubes (121), the top of each vertical tube (121) all is communicated with last tube connector (122), and the bottom of each vertical tube (121) all is communicated with following tube connector (123).

5. direct heat exchange coal hot air furnace as claimed in claim 1 is characterized in that: described heat exchanger (12) is made of a spirality pipe.

6. direct heat exchange coal hot air furnace as claimed in claim 1 is characterized in that: described housing (1) is made of inside and outside steel plate layer (101,102) therebetween muck cotton (103).