CN202470410U

CN202470410U - A coal hot air furnace

Info

Publication number: CN202470410U
Application number: CN2011205097683U
Authority: CN
Inventors: 陈玉涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-09
Filing date: 2011-12-09
Publication date: 2012-10-03
Anticipated expiration: 2021-12-09

Abstract

The utility model discloses a coal hot air furnace, comprising a combustor, a reversal chamber, a lower smoke box, a heat exchanger, an upper smoke body, an upper deashing cover, lower deashing doors, a smoke discharge fan, a chimney, a smoke circulation fan, a combustion blower and a hot air blower. The combustor and the heat exchanger are arranged in tandem and combined into a whole; the reversal chamber is disposed between the combustor and the heat exchanger for preventing high-temperature flame from heating the heat exchanger directly; the smoke reversal smoke boxes are disposed on and under the heat exchanger; the upper smoke box is provided with the deashing cover and the lower smoke box is provided with the deashing doors for easy deashing; and the smoke circulation fan extracts a part of smoke after heat exchange and blows the part of smoke to an outlet of the combustor for reducing the temperature of smoke entering into the heat exchanger. The heat exchanger and the combustor are arranged in tandem separately and are combined into a whole for delivery and smoke circulation technology is employed, so the service lifetime of the coal hot air furnace is prolonged greatly and heat efficiency is improved.

Description

A kind of coal-fired hot-blast stove

Technical field

The utility model relates to a kind of coal-fired hot-blast stove.

Background technology

Common, the combustion chamber and the design of heat exchanger of small-sized coal-fired hot-blast stove are structure as a whole, coal internal combustion produces in the combustion chamber thermal-flame and the direct heating heat exchanger of high-temperature flue gas; Flue gas after the heat exchange cooling enters atmosphere through chimney, because flame temperature is very high, air cooled ability is relatively poor; The service life of heat exchanger is very short; Even the combustion chamber is adopted special exotic material to make and can not be tackled the problem at its root, and, because structural limitations; The heating surface area of heat exchanger is arranged limited, and the thermal efficiency of low profile thermal wind furnace is often all very low.

Therefore,, further improve, enable to obtain the solution of essence, be very important in the problem that exists aspect the service life and the thermal efficiency to the shortcoming of existing small-sized coal-fired hot-blast stove.

Summary of the invention

In order to overcome the middle-size and small-size coal-fired hot-blast stove of the prior art short and low deficiency of the thermal efficiency in service life, the utility model provides a kind of coal-fired hot-blast stove, and one was arranged before and after combustion chamber and heat exchanger were separated; In the centre gas reversal chamber is set; Supporting smoke exhaust fan, the flue gas recirculation blower fan of being provided with, the heat exchanger input gas temperature is adjustable, and heat exchange area can arbitrarily strengthen; Thereby prolonged the service life of hot-blast stove greatly, improved the thermal efficiency.

The technical scheme that its technical problem of the utility model solution is taked is:

A kind of small-sized coal-fired hot-blast stove comprises combustion chamber, reversal chamber, lower smoke box, heat exchanger, upper smoke box, supernatant tepetate, following shoot door, smoke exhaust fan, chimney, flue gas recirculation blower fan, combustion blower and hot blast pressure fan.

Further, arranged apart before and after combustion chamber and the heat exchanger, be combined in one.

Further, the combustion chamber all adopts refractory brick to build by laying bricks or stones.

Further, establish gas reversal chamber between combustion chamber and the heat exchanger.

Further, heat exchanger adopts to erect puts tubular heat exchanger, and the flue gas that all is provided with up and down of heat exchanger turns to smoke box, and upper smoke box is established the deashing lid, and lower smoke box is established shoot door.

Further, the flue gas part after the heat exchange enters chimney through air-introduced machine, and a part is extracted the outlet that is blown into the combustion chamber, the flue-gas temperature that is used to regulate the heat exchanger import out through the flue gas recirculation blower fan.

The beneficial effect of the described coal-fired hot-blast stove of the utility model mainly shows:

1, described combustion chamber all adopts refractory brick to build long service life by laying bricks or stones.

2, described combustion chamber arranges that the centre is provided with gas reversal chamber, is combined into one before and after separating with heat exchanger; Avoided the direct heating heat exchanger of flame on the one hand; Prolong the service life of heat exchanger, kept low profile thermal wind furnace compact conformation on the other hand again, the characteristics of self-contained appearance.

3, described heat exchanger is the perpendicular tubular heat exchanger of putting, and flue gas is walked in the pipe, and air is walked outside the pipe, and heat exchanger all is provided with smoke box up and down, and upper smoke box is established the deashing lid, and lower smoke box is established shoot door, makes things convenient for deashing.

4, described heat exchanger and combustion chamber are arranged apart, to increasing heating surface area convenience are provided, for the maximization of equipment provides maybe.

5, described smoke exhaust fan has strengthened the burning capacity of combustion chamber, has guaranteed the abundant burning of fuel.

6, the application of described flue gas recirculation blower fan greatly reduces the flue-gas temperature of heat exchanger import, has protected heat exchanger, has prolonged the service life of heat exchanger.

Description of drawings

Fig. 1 is the basic block diagram of the described coal-fired hot-blast stove of the utility model.

Fig. 2 is the described coal-fired hot-blast stove A-A of a utility model cutaway view.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done and to be further described.

A kind of coal-fired hot-blast stove comprises combustion chamber 1, coal filling hole 17, circulating flue gas import 2 gas reversal chambers 3, heat exchanger 4, upper smoke box 5, deashing lid 6, exhanst gas outlet 7, smoke exhaust fan 9, chimney 8, lower smoke box 11, shoot door 10, hot-blast outlet 12, bellows 16, combustion blower 13, flue gas recirculation blower fan 14 and hot blast pressure fan 15 down.

The front wall of described combustion chamber 1 is established coal filling hole 17, and circulating flue gas import 2 is established in the outlet of combustion chamber.

Described combustion chamber 1 arranges that the centre is provided with gas reversal chamber 3 before and after opening in 4 minutes with heat exchanger.

Described heat exchanger 4 is put tubular heat exchanger for perpendicular, and upper smoke box 5 is set on it, and smoke box 11 is set in the bottom.

Deashing lid 6 is set on the described upper smoke box 5, establishes cleaning door 10 on the described lower smoke box.

Described heat exchanger 4 is the perpendicular shell and tube of putting, and flue gas is walked in the pipe, and air is walked outside the pipe.

Described coal-fired hot-blast stove is provided with smoke exhaust fan 9 and flue gas recirculation blower fan 14.

The course of work of the described coal-fired hot-blast stove of the utility model is:

Bunker coal fully burns in combustion chamber 1 through coal filling hole 17 adding combustion chambers 1, and the burning required air is provided by combustion blower 13; The high-temperature flue gas that burning produces is mixed to design temperature in the exit of combustion chamber with low-temperature flue gas from circulating flue gas import 2; Flow downward through gas reversal chamber 3, get into lower smoke box 11, turn to thereafter and upwards get into heat exchanger 4; Flue gas after the heat exchange cooling is through exhanst gas outlet 7; A part enters chimney 8 by smoke exhaust fan 9, and a part is extracted out by flue gas recirculation blower fan 14, is blown into the combustion chamber.

Cold air carries out heat exchange with flue gas outside hot blast pressure fan 15 is blown into the tube bank of heat exchanger, the hot-air after being heated flows out from hot-blast outlet 12, gets into follow-up equipment.

Claims

1. coal-fired hot-blast stove; Comprise combustion chamber, reversal chamber, lower smoke box, heat exchanger, upper smoke box, supernatant tepetate, following shoot door, smoke exhaust fan, chimney, flue gas recirculation blower fan, combustion blower and hot blast pressure fan; It is characterized in that said combustion chamber and heat exchanger front and back are arranged apart, arrange gas reversal chamber between said combustion chamber and the heat exchanger.

2. coal-fired hot-blast stove as claimed in claim 1 is characterized in that said heat exchanger is equipped with smoke box up and down, and upper smoke box is established the deashing lid, and lower smoke box is established shoot door.

3. coal-fired hot-blast stove as claimed in claim 1 is characterized in that the flue gas after said circulating fan is with heat exchange is extracted the outlet that a part is blown into the combustion chamber out, is used to reduce the flue-gas temperature of heat exchanger import.

4. coal-fired hot-blast stove as claimed in claim 1 is characterized in that described combustion chamber adopts refractory brick to build by laying bricks or stones and form.