CN202284894U

CN202284894U - Energy-saving environment-friendly cupola furnace

Info

Publication number: CN202284894U
Application number: CN2011203230810U
Authority: CN
Inventors: 王洪旗
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2012-06-27
Anticipated expiration: 2021-08-31

Abstract

The utility model discloses an energy-saving environment-friendly cupola furnace and belongs to the field of machine casting. The energy-saving environment-friendly cupola furnace comprises a cupola furnace body, an air introducing pipe, a heat exchanger, dust removing equipment, a draught fan, a chimney, an air blower and a hot air pipe; the hot flow inlet of the heat exchanger is connected with the flue gas outlet part of the cupola furnace through the air introducing pipe; the hot flow outlet of the heat exchanger is connected with the air inlet of the dust removing equipment; the air outlet of the dust removing equipment is connected with the chimney through the draught fan; the outlet of the air flower is connected with the cold flow inlet of the heat exchanger; and the cold flow outlet of the heat exchanger is connected with the air inlet of the cupola furnace through the hot air pipe. By arranging the heat exchanger, the dust removing equipment and other equipment, the tail gas of the furnace gas is subjected to heat energy recovery, and dust removal and desulfuration, so the effects of saving energy (reducing coke consumption) and reducing pollutant (high-temperature gas, SO2 and dust) emission can be achieved; and meanwhile, due to the adoption of a hot air inlet technology, the furnace temperature is increased, the rejection rate of a casting product is reduced, and economic benefit is increased.

Description

A kind of energy-conserving and environment-protective furnace cupola

Technical field

The utility model relates to a kind of furnace cupola.

Background technology

Reduction reaction can take place in furnace cupola in fusion process, make furnace gas tail gas produce about 13% CO, and flame temperature can reach 2095 ℃ during the CO burning, and calorific value is very high.Present employed furnace cupola generally is that furnace gas tail gas enters atmosphere by chimney, or because of the water that needs of cleaner directly carries out cooling processing, physics heat in the furnace gas tail gas and potential chemical heat (being the heat energy that the CO burning is discharged) are not utilized.This part heat energy summation is equivalent to 30% of employed coke burning time institute's release heat in the production process, will not slattern in vain if be not utilized, so the energy-saving and cost-reducing potentiality of furnace cupola is huge.Pollutions such as the dust that owing to the furnace cupola exhaust emissions atmosphere is caused simultaneously, sulfide also can not be ignored.

The utility model content

The utility model provides a kind of energy-conserving and environment-protective furnace cupola, and it has the heat utilization efficiency height, and good dedusting effect is to characteristics such as atmosphere pollution is little.

For solving the problems of the technologies described above; The technical scheme that the utility model is taked is: it comprises the furnace cupola body; It also comprises induced duct, heat exchanger, cleaner, air-introduced machine, chimney, air blast and warm-air pipe in addition; The hot-fluid inlet of heat exchanger links to each other with furnace cupola exhanst gas outlet portion through induced duct, and its hot-fluid outlet links to each other with the air inlet of cleaner, and the air outlet of cleaner links to each other with chimney through air-introduced machine; The outlet of air blast links to each other with the cold flow of heat exchanger inlet, and the cold flow outlet of heat exchanger links to each other with the air inlet of furnace cupola through warm-air pipe.

The further improvement of the utility model is:

The heat exchanger that adopts is a shell-and-tube heat exchanger; The cleaner that adopts comprises dust hopper and spray type dust separator, and they are H shape and connect; Between air-introduced machine outlet and chimney, be connected with dehydrator; The used cleaning solution of spray type dust separator is an alkaline water; Heat exchanger can also use by many serial or parallel connections; The outside of induced duct, heat exchanger and warm-air pipe is provided with insulation material; The diameter of heat conduction standpipe is 90mm-114mm in the heat exchanger.

Adopt the beneficial effect that technique scheme produced to be:

Produce negative pressure by air-introduced machine; Can make waste heat and CO thermal-arrest in furnace cupola heat collecting chamber of the furnace cupola furnace gas back of igniting get into the secondary combustion chamber burning; Get into heat exchanger again behind the gas of generation high temperature; Send in the furnace cupola after making the cold wind of air blast become high temperature air, played the effect of energy-saving and emission-reduction through heat exchange.According to evidence, that goes into the stove wind-warm syndrome increases that to melt the variation of effect following with furnace cupola:

Go into the number of degrees of the wind-warm syndrome raising of stove	150—200℃	300—400℃	400—600℃
				The coke consumption reduces percentage	15—20%	20—30%	45—50%
Molten iron temperature improves the number of degrees	20—25℃	30—50℃	50—100℃
				Melting rate improves percentage	10—20%	25—30%	50—60%

Also can use many heat exchanger serial or parallel connections according to the actual conditions at scene; Make the utilization that is fully absorbed of the used heat of tail gas, simultaneously insulation material is laid on the surface of induced duct, heat exchanger and warm-air pipe, can reduce heat energy loss; The mode that cleaner adopts dust hopper and spray type dust separator to combine; Can reclaim at dust hopper earlier big dust particle, remaining trickle particle reclaims through spray type dust separator once more, to reach the effect that dust is fully reclaimed; Because the used cleaning solution of deduster is an alkaline water, can when reclaiming dust, remove the SO2 of tail gas.

The utility model both energy-conservation (reducing burnt consumption); Reduce disposal of pollutants (high-temperature gas, SO2, dust) again; Can be described as the low carbon products of a kind of high-quality (promptly low pollution, low emission, low cost), and, furnace temperature is improved because adopt hot blast air intake mode; Reduced the sulfur content of product, product quality is improved.

Description of drawings

Fig. 1 is the structural representation of utility model.

In the accompanying drawings: 1 furnace cupola, 2 air blasts, 3 secondary combustion chambers, 4 induced ducts, 5 heat exchangers, 6 dehydrators, 7 warm-air pipes, 8 chimneys, 9 dust hoppers, 10 spray type dust separators, 11 air-introduced machines.

The specific embodiment

Can know by embodiment shown in Figure 1; It comprises furnace cupola body 1; It also comprises induced duct 4, shell-and-tube heat exchanger 5, dust hopper 9, spray scrubber 11, air-introduced machine 11, chimney 8, dehydrator 6, air blast 2 and warm-air pipe 7 in addition, and the hot-fluid inlet of shell-and-tube heat exchanger 5 links to each other with furnace cupola exhanst gas outlet portion through induced duct 4, and its hot-fluid outlet links to each other with the air inlet of dust hopper 9; The air outlet of dust hopper 9 is connected with fountain scrubbing tower 11, and it links to each other with chimney 8 through air-introduced machine 11, dehydrator 6 again; The outlet of air blast 2 links to each other with the cold flow inlet of heat exchanger 5, and the cold flow outlet of heat exchanger 5 links to each other with the air inlet of furnace cupola 1 through warm-air pipe 7; Spray type dust separator 10 used cleaning solutions are alkaline water; Outside at induced duct 4, heat exchanger 5 and warm-air pipe 7 is provided with insulation material.

Operation principle:

The furnace gas tail gas of high temperature burns after induced duct is delivered in the heat exchanger at secondary combustion chamber; Through heat pipe heat conduction; The cold wind that heat pipe is sent into heat exchanger to air blast is heated to high-temperature hot-air, sends into furnace cupola through warm-air pipe, thereby makes cool wind stove become high-temperature hot-air cupola; Reach energy saving purposes, the quality that also makes simultaneously cast product improves because of the raising of furnace temperature; High-temperature furnace gas through heat exchanger conducts most of heat in the cold wind of sending into to air blast owing to heat pipe; So the furnace gas temperature behind its heat exchanger reduces greatly; Furnace gas through cooling gets into dust storage chamber; Bigger grits are collected by dust storage chamber, and some tiny dust get into spray type dust separator and carry out dilatation through connecting airduct with furnace exhaust gas, and through the alkaline water smoke dust-removal and desulfurizing of multi-layer high-voltage spiral nozzle ejection; Clean afterwards air enters atmosphere through induced duct, air-introduced machine, dehydrator by chimney.

Claims

1. energy-conserving and environment-protective furnace cupola; It comprises furnace cupola body (1); It is characterized in that: it also comprises induced duct (4), heat exchanger (5), cleaner, air-introduced machine (11), chimney (8), air blast (2) and warm-air pipe (7); The hot-fluid inlet of said heat exchanger (5) links to each other with furnace cupola exhanst gas outlet portion through induced duct (4), and its hot-fluid outlet links to each other with the air inlet of cleaner, and the air outlet of said cleaner links to each other with chimney (8) through air-introduced machine (11); The outlet of said air blast (2) links to each other with the cold flow inlet of heat exchanger (5), and the cold flow outlet of said heat exchanger (5) links to each other with the air inlet of furnace cupola (1) through warm-air pipe (7).

2. a kind of energy-conserving and environment-protective furnace cupola according to claim 1 is characterized in that the outside of described induced duct (4), heat exchanger (5) and warm-air pipe (7) is provided with insulation material.

3. a kind of energy-conserving and environment-protective furnace cupola according to claim 2 is characterized in that said heat exchanger (5) is a shell-and-tube heat exchanger.

4. according to claim 1,2 or 3 described a kind of energy-conserving and environment-protective furnace cupolas, it is characterized in that said cleaner comprises dust hopper (9) and spray type dust separator (10), they are H shape and connect.

5. a kind of energy-conserving and environment-protective furnace cupola according to claim 4 is characterized in that being connected with dehydrator (6) between said air-introduced machine (11) outlet and the chimney (8).

6. a kind of energy-conserving and environment-protective furnace cupola according to claim 4 is characterized in that the used cleaning solution of said spray type dust separator (10) is an alkaline water.

7. according to claim 1,2 or 3 described a kind of energy-conserving and environment-protective furnace cupolas, it is characterized in that said heat exchanger (5) uses for many serial or parallel connections.

8. a kind of energy-conserving and environment-protective furnace cupola according to claim 3 is characterized in that the diameter of the interior heat conduction standpipe of described heat exchanger (5) is 90mm-114mm.