CN2195068Y - Positive-pressure high-efficiency energy-saving air heating furnace - Google Patents

Abstract

The utility model discloses a positive-pressure high-efficiency energy-saving air heating furnace, comprising a furnace body, a draught fan, a fume extractor, a chimney, a hot air pipe, etc. The utility model is characterized in that the utility model is provided with a positive-pressure air inlet device, and a burning chamber forms a bottleneck structure with unequal section. A spiral deflector is arranged in a heat convection cavity, and a waste heat utilization and recovery device is arranged between the draught fan and the fume extractor. The utility model has the advantages of novel and reasonable structure, high thermal efficiency and notable effect energy saving. The utility model is an ideal heating device in industry suitable for various operating conditions of high temperature, middle temperature and low temperature.

Description

Positive-pressure high-efficiency energy-saving air heating furnace

The utility model relates to a kind of industrial heat hot wind furnace.

At present, the hot-blast stove of industrial extensive employing generally is negative pressure air draught type structure.The major defect of this negative pressure air draught type hot-blast stove is that the scope of application is little, in being only applicable to, the heating of low temperature range.In addition, the combustion chamber of the hot-blast stove of this negative pressure air draught type structure generally adopts cylindrical structural and three common return-stroke type heat transfer types also not to add the UTILIZATION OF VESIDUAL HEAT IN retracting device simultaneously, thereby thermal loss is comparatively serious, and the thermal efficiency generally only is about 50%.

In view of the problem of above-mentioned existence, the purpose of this utility model provides a kind of thermal efficiency height, and good energy-conserving effect is applicable to the malleation energy efficient hot air furnace of high, medium and low each section temperature range heating.

For achieving the above object, the utility model has been taked following measure: 1, the air intake mode of negative pressure air draught type is improved being designed to the malleation forced air inlet, to improve heat exchanger effectiveness.2, improve the structure of combustion chamber, the Combustion chamber design of hot-blast stove is become the bottleneck structure of unequal section, the fuel that is beneficial in the combustion chamber is fully burned, and improves the furnace temperature and the thermal efficiency effectively.3, penetrate the principle of convection current forced friction heat exchange according to two revolution width of cloth, in the heat convection chamber, added the spirality flow deflector, the air-flow that enters in the heat convection chamber is carried out mandatory friction heat exchange, to improve its thermal conversion efficiency.4, add the UTILIZATION OF VESIDUAL HEAT IN retracting device, improved utilization rate of waste heat.

Malleation energy efficient hot air furnace after the above-mentioned design of process is rational in infrastructure, the thermal efficiency is high, energy-saving effect is remarkable, it is compared with existing industrial hot-blast stove, energy-conservation more than 40%, the thermal efficiency has reached more than 72%, economizing on material about 40%, is a kind of desirable energy-efficient industry heating facility that is applicable to the various operating modes of high, medium and low temperature.

Specific embodiments of the present utility model is as shown in drawings:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is that A-A of the present utility model is to schematic diagram

Fig. 3 is that cuing open of the utility model body of heater shown schematic diagram

Fig. 4 is the structural representation of the utility model UTILIZATION OF VESIDUAL HEAT IN retracting device

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated:

The malleation energy efficient hot air furnace includes parts such as body of heater 1, blower unit 3, UTILIZATION OF VESIDUAL HEAT IN retracting device 5, chimney 8, smoking machine 9, warm-air pipe 10 and malleation air-intake device.The malleation air-intake device is made up of air blast 6, blast pipe 7.In body of heater 1, be provided with combustion chamber 11 and heat convection chamber 12.The combustion chamber adopts refractory material to make, and it is shaped as the bottleneck structure of unequal section.Bottom in the combustion chamber is provided with grate 13.Heat convection chamber 12 cylindrical structures are installed in the outside of combustion chamber 11, and adopt heat conductivility good metal material to make.In order to make the air-flow that enters in the heat convection chamber obtain the forced friction heat exchange, in heat convection chamber 12, be provided with spiral flow deflector 14.Blower unit 3 is installed in the top of body of heater 1 by flange 2.Between blower unit 3 and smoking machine 9, be provided with UTILIZATION OF VESIDUAL HEAT IN retracting device 5.UTILIZATION OF VESIDUAL HEAT IN retracting device 5 one ends are connected with blower unit 3 by flange 4, add an end and are connected with smoking machine 9.UTILIZATION OF VESIDUAL HEAT IN retracting device 5 is made of the columniform sleeve pipe of bilayer.Inner sleeve 18 is a smoke discharge pipe, and it directly is connected with smoking machine 9, chimney 8.Inner sleeve 18 constitutes air-inlet cavity 17 with outer tube 19.Air-inlet cavity 17 is provided with air inlet, and is connected with air blast 6 by blast pipe 7.In order to make the air-flow and the high-temperature flue gas in the smoke discharge pipe that enter in the air-inlet cavity reach the purpose that the enforceable width of cloth is penetrated the convection current friction heat exchange, at inner sleeve 18(smoke discharge pipe) outer rim be provided with spirality flow deflector 20.Thereby not only reduce the exhaust gas temperature in the smoke exhaust pipe effectively, eliminated the harm that the high temperature exhaust gas temperature causes smoking machine, and, effectively utilized the high-temperature residual heat of discharging fume, improved the utilization rate of EAT and heat energy.In addition, for ease of removing flue dust, the bottom in the heat convection chamber that is connected with smoke discharge pipe also is provided with the flue dust cleaning hole.

Working method of the present utility model is achieved like this: the high-temperature flue gas in the combustion chamber 11 is under the effect of smoking machine, produce negative pressure, make high-temperature flue gas in the combustion chamber 11 from the radial ringed floss hole 16 of top of combustion chamber, enter VI, the II in the heat convection chamber 12 in the body of heater successively, enter the inner sleeve 18(smoke discharge pipe of UTILIZATION OF VESIDUAL HEAT IN retracting device 5 at last by the inner chamber of blower unit 3), through smoking machine 9, from chimney 8, discharge.Air intake gas is then by air blast 6 pressurizations, in blast pipe 7 enters the air-inlet cavity 17 of UTILIZATION OF VESIDUAL HEAT IN retracting device 5, undertaken after the width of cloth penetrates the heat exchange of convection current forced friction by the spirality flow deflectors 20 that are provided with in the UTILIZATION OF VESIDUAL HEAT IN retracting device 5, exocoel by blower unit, enter successively in the I, III, V of the heat convection 12 in the body of heater, and undertaken after the width of cloth penetrates the heat exchange of convection current forced friction by being arranged at spirality flow deflector 14 in the heat convection chamber, after warm-air pipe 10 discharge, thereby finished whole heating process.

Claims (3)

1, a kind of malleation energy efficient hot air furnace that includes body of heater (1), blower unit (3), smoking machine (9), chimney (8), warm-air pipe (10), it is characterized in that this malleation energy efficient hot air furnace is provided with the malleation air-intake device, combustion chamber (11) is the bottleneck structure of unequal section, in heat convection chamber (12), be provided with spiral flow deflector (14), between blower unit (3) and smoking machine (9), be provided with UTILIZATION OF VESIDUAL HEAT IN retracting device (5).

2, malleation energy efficient hot air furnace according to claim 1, it is characterized in that described UTILIZATION OF VESIDUAL HEAT IN retracting device (5) is made of the columniform sleeve pipe of bilayer, inner sleeve (18) constitutes air-inlet cavity (17) with outer tube (19), outer rim in inner sleeve (18) is provided with spirality flow deflector (20).

3, malleation energy efficient hot air furnace according to claim 1 is characterized in that described malleation air-intake device is made up of air blast (6), blast pipe (7).

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