CN2139255Y

CN2139255Y - Self-heating high-temp air feed cupola

Info

Publication number: CN2139255Y
Application number: CN 92231976
Authority: CN
Inventors: 张启坤
Original assignee: BLAST CUPOLA BRANCH QINGDAO BO
Current assignee: BLAST CUPOLA BRANCH QINGDAO BO
Priority date: 1992-09-08
Filing date: 1992-09-08
Publication date: 1993-07-28
Anticipated expiration: 2002-09-08

Abstract

The utility model discloses a self-heating high-temperature air feed cupola, which comprises an upper, a middle and a lower heat exchangers, a heat exchange fin, two air regulating valves, an air discharging valve, two rows of air rings, a tuyere and a connecting tube. The inner of the cylinder body of the upper heat exchanger is weld with vertical heat exchange fins being axially distributed. The two ends of the outer round of the cylinder body have the same height with upper and lower air collecting boxes. The middle and lower heat exchangers are not provided with heat exchange fins. The utility model has a low air feeding resistance and only needs a centrifugal fan with low price and low energy consumption. An air feed temperature can be enhanced. The utility model avoids the defect of the adoption of jacket tube and is additionally provided with the air discharging valve to prevent an unsafety from stopping meltability required by a midway. The heat exchanger has a longer service life.

Description

Self-heating high-temp air feed cupola

The utility model relates to a kind of self-heating high temperature air supply cupola furnace.

Furnace cupola is a kind of equipment of melting molten iron.Furnace charge (containing the pig iron, coke and flux etc.) is entered and is moved down successively by the heating gate on top, gives heat back iron charge through the hot furnace gas of operation from bottom to top and is smelted into molten iron gradually to splash into cupola well overheated, flows in the forehearth standby through tapping hole.Waste gas is discharged from the furnace roof deduster.

The heat loss that waste gas is taken away reduces with the rising of ventilation temperature, and the thermal efficiency of furnace cupola significantly improves with the rising of ventilation temperature, therefore, improves that to give hot ventilation temperature be the effective measures of strengthening cupola melting.

In the CN86207381U of the Decree of Patent Office of China, announce a kind of thermal type air supply cupola furnace and seen Fig. 5, do not change piece number in the prior art in order to narrate clear, just piece number adds the garden circle so that distinguish mutually with piece number of the present utility model, by 1. big hot blast courage (being heat exchanger), 2. small blast-heating chamber, 3. cut down door, 4., 5. airduct, 6. connect airduct, 7. cold air diffuser, 8. the low temperature bellows, 9. the high temperature bellows, 10. the high temperature air port is formed, adopts the thermal type air feed of big or small two wind courages.Its weak point is: the air feed resistance is big, particularly 2. in the small blast-heating chamber, give the hot blast densely covered heat exchanger fin that need weave throngh, though can improve heat exchange efficiency, resistance has also strengthened greatly, also has wind through the 4. resistance the during gap between 5. of airduct, thereby limited the employing centrifugal blower, and and still need use Roots blower, 5. 4. duct sleeve is loaded in the airduct, 4. the lower temperature wind in the airduct take away higher temperatures wind (5. airduct heat, make heat 5. airduct wind-warm syndrome reduce; Secondly, encasement tube manufacturing, installation and maintenance are more bothersome, temperature difference between two pipes, connect and sealing be not easy lasting and firmly.

The purpose of this utility model is to overcome above-mentioned weak point of the prior art and a kind of self-heating high temperature air supply cupola furnace is provided.

The purpose of this utility model can reach by following measure: the utility model is by three heat exchangers in upper, middle and lower, heat exchanger fin, two regulating the qi flowing in the channels cut down, leak informaton cut down, two air draft circles, air port be connected airduct and form.Be welded with radial uniform vertical heat exchanger fin in the last heat exchanger stack shell, stack shell Wai Yuan two ends are with plenum chamber is concordant up and down.In, down in the heat exchanger heat exchanger fin is not set.

The drawing of accompanying drawing is described as follows:

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

Fig. 2 cuts open figure for the A-A office of Fig. 1.

Fig. 3 is for being equipped with furnace cupola schematic diagram of the present utility model.

Fig. 4 be the B of Fig. 1 to view, only represent the air turnover structural representation of plenum chamber up and down, what dotted line was represented is the prior art constructions signal.

Fig. 5 is the prior art constructions schematic diagram.

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing: referring to Fig. 1-Fig. 4, Fig. 3 represents to be equipped with furnace cupola schematic diagram of the present utility model, and furnace cupola mainly comprises: deduster 1, charge door 2, expansion appliance 3, workbench 4, upper, middle and

lower heat exchanger

5,6,7, solar or lunar halo 8, cupola well 9 and supporting leg 10.Air blast enters the structure of plenum chamber 16 and sees Fig. 4, and its effect is to reduce the air feed resistance, and prior art constructions is seen shown in the dotted line.Air through giving heat is discharged the structure and effect the same (not expression on the figure) of plenum chamber 17 down.Be welded with radial uniform vertical heat exchanger fin 27(in last heat exchanger 5 stack shells 28 and see Fig. 2).Stack shell 28 Wai Yuan two ends are with plenum chamber is concordant up and down, rather than stretching in plenum chamber 16 and the following plenum chamber 17 as shown in the prior art, are in order to reduce the air feed resistance equally.Through last heat exchanger 5 give air that heat crosses enter through pipe 18 in heat exchanger 6, after further heat exchange, shunt by managing 19, one the road enters down heat exchanger 7 from managing 20, heat exchange teases and ridicule by one that wind cuts down 15, one air draft circle 25 and an exhaust outlet 26 enters furnace chamber 11 after manage 24, participates in the melting to furnace charge; Another path tube 21, transfer wind to cut down 14, two air draft circles 22 and two exhaust outlets 23 enter furnace chamber, air port 23 and 26 respectively has many, is radial uniform, is built by laying bricks or stones by refractory brick 12 to form.In, down heat exchanger is not provided with heat exchanger fin.Transferring wind to cut down 14 and 15 effect is to regulate air quantity.Leak informaton and cut down 13 function and be: in furnace cupola work process, when reasons such as notes occur having little time burning need stop to continue to melt, must close and transfer wind to cut down 14 and 15, at this moment, high temperature in the furnace chamber 11 heat up for rapidly body of heater (steel plate) to soften until fusing, will leak informaton in order to cool off body of heater to cut down 13 and open.Allow the cooling body of heater the thermal current emptying and body of heater cooled off.

The utility model contrast prior art has following advantage:

1, little for wind resistance. Selected centrifugal fan, contrasted as follows.

Technical Reference prior art the utility model

Blower fan title Roots blower centrifugal blower

Power of motor (kilowatt) 55 30

Air quantity (cubic meter/minute) 50 60

Blast (Pa) 40,000 20000

The air feed pressure loss (Pa)～15000～2500

Price (unit)～39000～8500

Find out that from last table the utility model pressure loss is little, it is low, cheap to consume energy.

2, ventilation temperature improves.Because the utility model adopts three heat exchangers, following heat exchanger can be filled to more high-temperature region, uses heat-resisting steel sheet and plate in case of necessity, and less because of consumption, cost increases limited.Actual measuring: prior art high temperature air port (10) is located wind-warm syndrome～350-400 ℃, and 15 place's wind-warm syndrome 〉=500 ℃ are cut down in the utility model regulating the qi flowing in the channels.Tapping temperature 1480-1520 ℃.

That 3, has avoided adopting encasement tube to bring is unfavorable.

4, set up to leak informaton and cut down, can prevent from need stop to melt midway and bring dangerous.

5, all be provided with regulating the qi flowing in the channels at upper and lower two air draft circle places and cut down, can regulate arbitrary row's air quantity respectively, and it is low to install the position, easily operation.Prior art can not be regulated the air quantity of high temperature bellows, regulate low temperature bellows air quantity to cut down (3) installation site higher, reach 4～5 meters of ≈, operation inconvenience.

6, the service life of prior art small blast-heating chamber lower, and the utility model heat exchanger makes heat exchanger self upper and lower side reduce because of the stress that the temperature difference produces owing to adopt multi-segment structure, so service life is higher.

Claims

1, a kind of self-heating high temperature air supply cupola furnace comprises that two heat exchangers, a regulating the qi flowing in the channels cut down, and it is characterized in that increased by one and can be filled to the more following heat exchanger of high-temperature region, the accent wind that has increased a following air draft circle cuts down and sets up to leak informaton and cuts down.

2, self-heating high temperature air supply cupola furnace according to claim 1, it is characterized in that, be welded with radial uniform vertical heat exchanger fin in the last heat exchanger stack shell, stack shell Wai Yuan two ends are with plenum chamber is concordant up and down, the structure that air feed enters plenum chamber and leaves down plenum chamber is that the garden slips over and crosses, to reduce the air feed resistance.

3, self-heating high temperature air supply cupola furnace according to claim 1 is characterized in that, in, down do not establish heat exchanger fin in the heat exchanger.