CN202008282U

CN202008282U - Smoke exhaust pipe waste heat recovery device

Info

Publication number: CN202008282U
Application number: CN2011200776118U
Authority: CN
Inventors: 于敬学; 鄂鹏举; 李贵春
Original assignee: KAIYUAN SUNSHINE BOILER FACTORY
Current assignee: KAIYUAN SUNSHINE BOILER FACTORY
Priority date: 2011-03-23
Filing date: 2011-03-23
Publication date: 2011-10-12
Anticipated expiration: 2021-03-23

Abstract

The utility model discloses a smoke exhaust pipe waste heat recovery device, which comprises a smoke exhaust pipe. An outer sleeve is sleeved on the smoke exhaust pipe, two ends of the outer sleeve are welded on the outer wall of the smoke exhaust pipe in a sealed manner, a cold air inlet and a hot air outlet are arranged on the wall of the outer sleeve close to the two ends of the outer sleeve, an air passage is formed between the outer sleeve and the smoke exhaust pipe, and radiating fins are welded on the outer wall of the smoke exhaust pipe. The smoke exhaust pipe waste heat recovery device is capable of recycling heat in smoke in the smoke exhaust pipe of a blast stove, fuel consumption of the blast stove is reduced, hot blast temperature is increased, and energy conservation, emission reduction and high efficiency are achieved.

Description

A kind of smoke discharging pipe waste-heat recovery device

Technical field

The utility model relates to waste-heat recovery device, especially is arranged on the waste-heat recovery device on the hot-blast stove smoke discharging pipe.

Background technology

Foodstuff drying device all is coal-fired hot-blast stove mostly at present, the high-temperature flue gas that fuel combustion produces forms dry-heat air by heat exchanger to air heat, flue gas after the heat exchange then is discharged in the atmosphere by smoke discharging pipe, the flue-gas temperature of being discharged by smoke discharging pipe is usually at 180-280 ℃, directly discharges in the atmosphere heat and loses seriously.Some dryer is directly introduced dryer with the flue gas that reclaims for fuel saving, though energy recovery like this makes the decline of oven dry grain quality, pollutes, and simultaneously, also brings disaster hidden-trouble to dryer.

The utility model content

The technical problem that utility model will solve is: a kind of smoke discharging pipe waste-heat recovery device is provided, and this device can reclaim the heat of flue gas in the hot fire grate smoke pipe road, reduces the fuel consumption of hot-blast stove, improves hot blast temperature, reaches energy-conservation, reduces discharging, purpose efficiently.

The technical scheme that the technical solution problem is adopted: a kind of smoke discharging pipe waste-heat recovery device, comprise smoke discharging pipe, on smoke discharging pipe, be set with outer sleeve, the two ends sealing of outer sleeve is on the smoke discharging pipe outer wall, on barrel, have inlet of cold air and hot air outlet near the two ends of outer sleeve, between outer sleeve and smoke discharging pipe, form air flow channel, on the smoke discharging pipe outer wall, be welded with radiating fin.

As improvement of the present utility model: described radiating fin thickness 2-4mm, height 20-40mm.

As further improvement of the utility model: be welded with deflection plate in the air flow channel between inlet of cold air and hot air outlet.

Described deflection plate is the semi-round ring shape deflection plate, and the deflection plate inner arc is welded in the smoke discharging pipe outer wall, and outer arc is welded in the outer sleeve inwall.

Described deflection plate is that a plurality of, adjacent deflection plates is a center of circle dislocation rotary setting with the flue axis.

Adjacent deflection plate is ° setting of center of circle dislocation Rotate 180 with the flue axis.

Further improve again as of the present utility model: on the outer wall of outer sleeve, be covered with the rock wool heat-preservation layer.

Improve as another kind of the present utility model: the air inlet at outer sleeve is provided with safe screen cloth.

Beneficial effect: in the utility model, on smoke discharging pipe, be set with outer sleeve owing to having adopted, the two ends sealing of outer sleeve is on the smoke discharging pipe outer wall, on sidewall, have inlet of cold air and hot air outlet near the two ends of outer sleeve, between outer sleeve and smoke discharging pipe outer wall, form air flow channel, on the smoke discharging pipe outer wall, be welded with the technical scheme of radiating fin, make smoke discharging pipe waste-heat recovery device of the present utility model from the flue gas after the hot-blast stove heat exchange, to reclaim heat, the cold air that will enter heat exchanger is preheated, therefore, this device can reduce the fuel consumption of hot-blast stove, improve hot blast temperature, reach energy-conservation, reduce discharging, purpose efficiently; Owing to reasonably define radiating fin thickness and height, increased heat exchange area, make hot-blast stove smoke discharging pipe waste-heat recovery device energy recovery better effects if of the present utility model; Owing to adopted the technical characterictic that is welded with deflection plate in the air flow channel between inlet of cold air and hot air outlet, increased the flow process of air in runner, improved the energy recovery effect; Owing to further define the shape and the set-up mode of deflection plate, make air S-shaped flowing in runner, further increased the flow process of air, and utilized the flow-disturbing effect of deflection plate to make cold air can absorb the waste heat of flue gas in the smoke discharging pipe better, the energy recovering effect better, more energy-conservation; Owing to adopted the technical characterictic that on the outer wall of outer sleeve, is covered with the rock wool heat-preservation layer, prevented the loss of heat energy, improved finally the temperature of the hot-air of discharging from hot air outlet; In addition, owing to adopted the technical characterictic that is provided with safe screen cloth at the air inlet of outer sleeve, can prevent effectively that combustibles or foreign matter from entering air flow channel generation potential safety hazard.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the structural representation of smoke discharging pipe waste-heat recovery device of the present utility model;

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

Fig. 3 is the deflection plate front view of smoke discharging pipe waste-heat recovery device of the present utility model;

Fig. 4 is the fundamental diagram of smoke discharging pipe waste-heat recovery device of the present utility model.

The specific embodiment

As shown in Figure 1, smoke discharging pipe waste-heat recovery device of the present utility model, comprise smoke discharging pipe 4, be set with outer sleeve 9 on smoke discharging pipe, the two ends sealing of outer sleeve is on the smoke discharging pipe outer wall, on sidewall, have inlet of cold air 6 and hot air outlet 12 near the two ends of outer sleeve, between outer sleeve and smoke discharging pipe, form air flow channel, on the smoke discharging pipe outer wall, be welded with radiating fin 11, as shown in Figure 2, described radiating fin thickness 2-4mm, height 20-40mm.In order to obtain better energy recovery effect, be welded with deflection plate 8 in the air flow channel between inlet of cold air and hot air outlet, as shown in Figure 3, described deflection plate is the semi-round ring shape deflection plate, the deflection plate inner arc is welded in the smoke discharging pipe outer wall, and outer arc is welded in the outer sleeve inwall, and described deflection plate is a plurality of, adjacent deflection plate is that the center of circle rotates a certain angle and shifts to install with the flue axis, is preferably ° setting of dislocation Rotate 180.On the outer wall of outer sleeve, be covered with rock wool heat-preservation layer 7, be provided with safe screen cloth 5 at the air inlet of outer sleeve.

As shown in Figure 4, the flue gas after 3 heat exchange of hot-blast stove 14 heat exchangers arrives cigarette air-introduced machine 10 from smoke discharging pipe through smoke discharging pipe waste-heat recovery device of the present utility model, discharges from chimney; The cold air that enters from smoke discharging pipe waste-heat recovery device inlet of cold air of the present utility model, in air flow channel, reclaim the heat energy of flue gas in the smoke discharging pipe, the heating back forms hot-air drains into air-heater 13 from hot air outlet air inlet, the air heat exchanger that together enters hot-blast stove with the cold air in the external world heats, hot blast after the heating arrives foodstuff drying device 1 through hot-flow flue 2, for foodstuff drying device provides hot blast.

Claims

1. smoke discharging pipe waste-heat recovery device, comprise smoke discharging pipe (4), on smoke discharging pipe, be set with outer sleeve (9), the two ends sealing of outer sleeve is on the smoke discharging pipe outer wall, on barrel, have inlet of cold air (6) and hot air outlet (12) near the two ends of outer sleeve, between outer sleeve and smoke discharging pipe, form air flow channel, it is characterized in that: on the smoke discharging pipe outer wall, be welded with radiating fin (11).

2. smoke discharging pipe waste-heat recovery device according to claim 1 is characterized in that: described radiating fin (11) thickness 2-4mm, height 20-40mm.

3. smoke discharging pipe waste-heat recovery device according to claim 1 and 2 is characterized in that: be welded with deflection plate (8) in the air flow channel between inlet of cold air and hot air outlet.

4. smoke discharging pipe waste-heat recovery device according to claim 3 is characterized in that: described deflection plate is the semi-round ring shape deflection plate, and the deflection plate inner arc is welded in the smoke discharging pipe outer wall, and outer arc is welded in the outer sleeve inwall.

5. smoke discharging pipe waste-heat recovery device according to claim 4 is characterized in that: described deflection plate is that a plurality of, adjacent deflection plates is a center of circle rotary setting with the flue axis.

6. smoke discharging pipe waste-heat recovery device according to claim 5 is characterized in that: adjacent deflection plate is ° setting of center of circle Rotate 180 with the flue axis.

7. smoke discharging pipe waste-heat recovery device according to claim 3 is characterized in that: be covered with rock wool heat-preservation layer (7) on the outer wall of outer sleeve.

8. smoke discharging pipe waste-heat recovery device according to claim 7 is characterized in that: the air inlet at outer sleeve is provided with safe screen cloth (5).