CN203880927U - Efficient coal-fired hot air furnace - Google Patents

Efficient coal-fired hot air furnace Download PDF

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Publication number
CN203880927U
CN203880927U CN201420320707.6U CN201420320707U CN203880927U CN 203880927 U CN203880927 U CN 203880927U CN 201420320707 U CN201420320707 U CN 201420320707U CN 203880927 U CN203880927 U CN 203880927U
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China
Prior art keywords
hot
heat exchanger
burner hearth
efficient coal
cold wind
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CN201420320707.6U
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Chinese (zh)
Inventor
陈国昌
陈国和
曾际和
曹高文
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LESHAN LEGUO BOILER Co Ltd
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LESHAN LEGUO BOILER Co Ltd
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Abstract

The utility model discloses an efficient coal-fired hot air furnace. The efficient coal-fired hot air furnace comprises a hearth and a heat exchange chamber. The heat exchange chamber is located above the hearth, a heat exchanger is arranged in the heat exchange chamber, a cold air inlet is formed in the left side of the upper portion of the heat exchange chamber, a hot air outlet is formed in the right side of the upper portion of the heat exchange chamber, a smoke outlet is formed in the top of the heat exchange chamber, and the heat exchanger is connected with the cold air inlet and the hot air outlet. A fuel coal feed port is formed in the left side of the hearth, and an ash outlet is formed in the right side of the hearth. The lower portion of the heat exchange chamber dents inwards to form a furnace arch. An inclined discharge plate is arranged at the lower portion in the hearth. The efficient coal-fired hot air furnace is high in heat exchange efficiency, and the hearth will not be blocked easily.

Description

A kind of high-efficient coal firing hot-air furnaces
Technical field
The hot-blast stove that the utility model relates to, relates in particular to a kind of high-efficient coal firing hot-air furnaces.
Background technology
Hot-blast stove as thermal power machinery starts extensive use in late 1970s in China, and it has become the regeneration product of electric heat source and traditional steam power thermal source in many industries.By long production practices, it has been recognized that, only have the hot blast of utilization as medium and carrier could be larger improve heat utilization efficiency and hot working effect.Traditional electrical thermal source and steam thermal power often configure many circulating fans in course of conveying, make it final or indirectly form the hot blast operation of drying or heat.The obvious existence of this process wastes energy in a large number and causes the shortcomings such as auxiliary device is too much, complex technical process.And larger problem is, this thermal source, for that requirement that needs higher temperature to be dried or to toast operation, is felt simply helpless.The appearance of coal-fired hot-blast stove can overcome the above problems smoothly.But coal-fired hot-blast stove in use also exists the problems such as heat exchange efficiency is low, the easy obstruction of burner hearth.
Utility model content
The purpose of this utility model is to overcome the defect of prior art, and the high-efficient coal firing hot-air furnaces that a kind of heat exchange efficiency is high, be difficult for stopping up burner hearth is provided.
The technical solution adopted in the utility model is:
A kind of high-efficient coal firing hot-air furnaces, comprise burner hearth and Heat Room, described Heat Room is positioned at burner hearth top, and its inside is provided with heat exchanger, left side, top is provided with cold wind import, right side, top is provided with hot-blast outlet, and top is provided with exhanst gas outlet, and described heat exchanger is connected with hot-blast outlet with cold wind import, described burner hearth left side is provided with coal-fired charge door, right side is provided with lime-ash outlet, the formation furnace arch, furnace nose that caves inward below described Heat Room, and below, described burner hearth inside is provided with the stripper of an inclination.
Further, described heat exchanger is comprised of main cold wind guide pipe, minute public attention, some heat exchanger tubes and hot blast manifold trunk, described cold wind import is connected with described cold wind guide pipe, within described minute, public attention is inverted funnel-form, and be connected with described cold wind guide pipe, described heat exchanger tube is positioned at described minute public attention below, and one end is attached thereto, the other end is connected with hot blast manifold trunk, and described hot-blast outlet is connected with described hot blast manifold trunk.
Further, described heat exchanger tube and hot blast manifold trunk tube wall outside are provided with some fins.
Further, described heat exchanger tube and hot blast manifold trunk are provided with hot fastener.
Further, described heat exchanger tube is bellows.
Further, the angle of described stripper and horizontal plane is 15 ° ~ 30 °.
Further, in described discharging version, have hole.
Further, described coal-fired charge door and lime-ash export center are not in the same horizontal line, described coal-fired charge door is positioned at top, described burner hearth left side, and higher than described stripper left side edge, described lime-ash outlet is positioned at below, described burner hearth right side, and its lower limb is concordant with described stripper right side edge.
Further, below, described burner hearth left side is provided with combustion air import.
The beneficial effects of the utility model are:
1) the utility model is simple in structure, adopts Heat Room sunken inside to form furnace arch, furnace nose, increases the coal-fired burning time of staying in burner hearth, reduces heat loss due to unburned gas and heat loss due to combustibles in refuse; Increase the length of horizontal flue, be beneficial to the layout of boiler heating surface; Increased flue gas flow, strengthened flue gas mixing, made flue gas be tending towards even along the height distribution of flue; Improve the Scouring Characteristic of flue gas heat exchanger, improve heat-transfer effect; Make flue gas better be full of upper furnace, to increase the caloric receptivity of heat exchanger tube, reduce heat loss due to exhaust gas; Reduce directly washing away of heat exchanging tube wall, improve heat transfer effect in Heat Room;
2) stripper of inclination is set in burner hearth, and coal-fired charge door and lime-ash export center are not in the same horizontal line, are beneficial to the coal-fired lime-ash discharge of burning and burn in burner hearth center that slides under Action of Gravity Field;
3) heat exchanger tube adopts bellows, and outer surface design fin, and the contact area of flue gas in increase and Heat Room, increases cold wind heat exchange area, improves heat transfer effect;
4) design combustion fan combustion air import, combustion air is through the hole on the stripper tilting, combustion-supporting, improves coal-fired flammability, guarantees that the heat in Heat Room is sufficient;
5) hot fastener is set, prevents in heat transfer process, smoke convection washes away and body of heater vibration causes heat exchanger tube damaged in collision, affects heat exchange.
Accompanying drawing explanation
Fig. 1 is the structural representation of utility model.
Fig. 2 is heat exchange tube structure schematic diagram.
The specific embodiment
In order to make the advantage of the purpose of this utility model and technical scheme clearer, below in conjunction with accompanying drawing and example, the utility model is further elaborated.
A kind of high-efficient coal firing hot-air furnaces as shown in Figure 1, comprise burner hearth 1 and Heat Room 2, described Heat Room 2 is positioned at burner hearth 1 top, its inside is provided with heat exchanger 3, left side, top is provided with cold wind import 4, right side, top is provided with hot-blast outlet 5, top is provided with exhanst gas outlet 6, described heat exchanger 3 is connected with hot-blast outlet 5 with cold wind import 4, described burner hearth 1 left side is provided with coal-fired charge door 7, right side is provided with lime-ash outlet 8, and described Heat Room 2 belows cave inward and form furnace arch, furnace nose 9, and the inner below of described burner hearth 1 is provided with the stripper 10 of an inclination.Furnace arch, furnace nose can increase the coal-fired burning time of staying in burner hearth, reduces heat loss due to unburned gas and heat loss due to combustibles in refuse; Increase the length of horizontal flue, be beneficial to the layout of boiler heating surface; Increased flue gas flow, strengthened flue gas mixing, made flue gas be tending towards even along the height distribution of flue; Improve the Scouring Characteristic of flue gas heat exchanger, improve heat-transfer effect; Make flue gas better be full of upper furnace, to increase the caloric receptivity of heat exchanger tube, reduce heat loss due to exhaust gas; Reduce directly washing away of heat exchanging tube wall, improve heat transfer effect in Heat Room.
Described heat exchanger 3 is comprised of main cold wind guide pipe 31, minute public attention 32, some heat exchanger tubes 33 and hot blast manifold trunk 34, described cold wind import 4 is connected with described cold wind guide pipe 31, within described minute, public attention 32 is inverted funnel-form, and be connected with described cold wind guide pipe 31, described heat exchanger tube 33 is positioned at described minute public attention 32 belows, one end is attached thereto, and the other end is connected with hot blast manifold trunk 34, and described hot-blast outlet 5 is connected with described hot blast manifold trunk 34.Cold wind enters heat exchanger 3 from described cold wind import 4, along cold wind guide pipe 31, flow, through 32 shuntings of minute public attention enter in heat exchanger tube 33 with described Heat Room 2 in flue gas heat exchange, after cold wind is heated, come together in hot blast manifold trunk 34, enter hot-blast outlet 5 discharges.
As shown in Figure 2, described heat exchanger tube 33 is bellows, described heat exchanger tube 33 and hot blast manifold trunk 34 tube wall outsides are provided with some fins 35, described heat exchanger tube 33 and hot blast manifold trunk 34 are provided with hot fastener 36, increased heating surface area, improve heat exchange efficiency, and hot fastener 36 has been in heat transfer process, smoke convection washes away and body of heater vibration causes heat exchanger tube damaged in collision, affects heat exchange.
Described stripper 10 is 15 ° ~ 30 ° with the angle of horizontal plane, in described discharging version 10, has hole.Described coal-fired charge door 7 and lime-ash export 8 centers not in the same horizontal line, described coal-fired charge door 7 is positioned at described burner hearth 1 top, left side, and higher than described stripper 10 left side edge, described lime-ash outlet 8 is positioned at described burner hearth 1 below, right side, and its lower limb is concordant with described stripper 10 right side edge, is beneficial to the coal-fired lime-ash sliding into after burner hearth 1 heart burns and burnt and discharges under Action of Gravity Field.
Described burner hearth 1 below, left side is provided with combustion air import 11, helps and is connected combustion wind through stripper 10 holes with combustion blower fan, combustion-supporting, improves coal-fired flammability, guarantees that the heat in Heat Room is sufficient.
Working method of the present utility model is hot-blast stove cold air blast import 4 to be connected to the 11 combustion blower fans connections of combustion-supporting air port with pressure fan.Open pressure fan, by coal-fired charge door 7 heating coal cinders, firing up.Open combustion fan, blowing-in and combustion-supporting.Cold wind, by the high-temperature flue gas heat exchange in heat exchanger 3 and Heat Room 2, is then discharged from hot-blast outlet 5.The lime-ash completely that burns is discharged from lime-ash outlet 8.
The utility model is simple in structure, and heat exchange efficiency is high, and the difficult burner hearth that stops up of lime-ash, has good value for applications.

Claims (9)

1. a high-efficient coal firing hot-air furnaces, comprise burner hearth (1) and Heat Room (2), described Heat Room (2) is positioned at burner hearth (1) top, its inside is provided with heat exchanger (3), left side, top is provided with cold wind import (4), right side, top is provided with hot-blast outlet (5), top is provided with exhanst gas outlet (6), described heat exchanger (3) is connected with hot-blast outlet (5) with cold wind import (4), described burner hearth (1) left side is provided with coal-fired charge door (7), right side is provided with lime-ash outlet (8), it is characterized in that: described Heat Room (2) below caves inward and forms furnace arch, furnace nose (9), the inner below of described burner hearth (1) is provided with the stripper (10) of an inclination.
2. a kind of high-efficient coal firing hot-air furnaces according to claim 1, it is characterized in that: described heat exchanger (3) is by main cold wind guide pipe (31), divide public attention (32), some heat exchanger tubes (33) and hot blast manifold trunk (34) form, described cold wind import (4) is connected with described cold wind guide pipe (31), described minute public attention (32) be inverted funnel-form, and be connected with described cold wind guide pipe (31), described heat exchanger tube (33) is positioned at described minute public attention (32) below, one end is attached thereto, the other end is connected with hot blast manifold trunk (34), described hot-blast outlet (5) is connected with described hot blast manifold trunk (34).
3. a kind of high-efficient coal firing hot-air furnaces according to claim 2, is characterized in that: described heat exchanger tube (33) and hot blast manifold trunk (34) tube wall outside are provided with some fins (35).
4. a kind of high-efficient coal firing hot-air furnaces according to claim 2, is characterized in that: described heat exchanger tube (33) and hot blast manifold trunk (34) are provided with hot fastener (36).
5. a kind of high-efficient coal firing hot-air furnaces according to claim 2, is characterized in that: described heat exchanger tube (33) is bellows.
6. a kind of high-efficient coal firing hot-air furnaces according to claim 1, is characterized in that: described stripper (10) is 15 ° ~ 30 ° with the angle of horizontal plane.
7. a kind of high-efficient coal firing hot-air furnaces according to claim 1, is characterized in that: in described discharging version (10), have hole.
8. a kind of high-efficient coal firing hot-air furnaces according to claim 1, it is characterized in that: described coal-fired charge door (7) and lime-ash outlet (8) center are not in the same horizontal line, described coal-fired charge door (7) is positioned at top, described burner hearth (1) left side, and higher than described stripper (10) left side edge, described lime-ash outlet (8) is positioned at below, described burner hearth (1) right side, and its lower limb is concordant with described stripper (10) right side edge.
9. a kind of high-efficient coal firing hot-air furnaces according to claim 1, is characterized in that: below, described burner hearth (1) left side is provided with combustion air import (11).
CN201420320707.6U 2014-06-17 2014-06-17 Efficient coal-fired hot air furnace Active CN203880927U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201420320707.6U CN203880927U (en) 2014-06-17 2014-06-17 Efficient coal-fired hot air furnace

Publications (1)

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CN203880927U true CN203880927U (en) 2014-10-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115518853A (en) * 2022-09-14 2022-12-27 浙江日鼎涂装科技有限公司 Air heat exchange structure of heating chamber

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115518853A (en) * 2022-09-14 2022-12-27 浙江日鼎涂装科技有限公司 Air heat exchange structure of heating chamber
CN115518853B (en) * 2022-09-14 2023-12-05 浙江日鼎涂装科技有限公司 Air heat exchange structure of heating chamber

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