CN203240889U - Low-melting-point alloy energy-saving and environment-friendly smelting furnace adopting alcohol-based fuel for heating - Google Patents

Abstract

The utility model discloses a low-melting-point alloy energy-saving and environment-friendly smelting furnace adopting alcohol-based fuel for heating. A furnace body comprises a furnace shell on the outer layer, heat insulation cotton on the middle layer and a silicon carbide hearth inner wall from outside to inside. An inner cavity of the hearth inner wall is matched with a crucible in appearance, and the uniform gap of 20-40mm is reserved between the inner cavity of the hearth inner wall and the crucible. Combustors adopting the alcohol-based fuel are arranged on the bottom of the crucible in a multi-point and controllable mode. Each combustor comprises a furnace core, an inner container and an outer cover coaxially from inside to outside. Each outer cover is provided with an air inlet communicated with a fan through an air pipe. Ventilation holes inclined upwards are formed in the side wall of each inner container from outside to inside, and a fuel oil nozzle communicated with an alcohol-based fuel supplier through an oil pipe, and an electronic ignition needle forming pulse ignition with the fuel oil nozzle are arranged inside each inner container. According to the low-melting-point alloy energy-saving and environment-friendly smelting furnace, the hearth inner wall is warmed fast, full combustion of the fuel is facilitated, and therefore more heat is generated, heat efficiency is improved further, the fuel is saved, the alcohol-based fuel can replace diesel oil for smelting, and the effect of saving energy, reducing emission and protecting environment is achieved.

Description

Adopt the low-melting alloy energy-conserving and environment-protective smelting furnace of alcohol-group fuel heating

(1) technical field:

The utility model relates to smelting furnace, is specially a kind of low-melting alloy energy-conserving and environment-protective smelting furnace that adopts the alcohol-group fuel heating.

(2) background technology:

The smelting equipment of the low-melting alloy die casting producers such as the aluminium of most domestic, zinc mostly adopts the fuel such as diesel oil, liquefied gas, coke to smelt.

The smelting furnace that wherein acts as a fuel take diesel oil is great majority, the reason that the materials such as flue dust are arranged owing to burn needs and emission, the inboard wall of burner hearth of smelting furnace and crucible gap are larger, the flame that the diesel injection spray burning forms is pasting the crucible outer wall tour around a circle after, most of heat is discharged flue with tail gas, pollutes weight, combustion rate (50%) and heat utilization efficiency (20%) very low.

(3) utility model content:

For improving combustion utilization efficiency and reduction to the pollution of environment, the utility model proposes a kind of low-melting alloy energy-conserving and environment-protective smelting furnace that adopts the alcohol-group fuel heating.

The utility model adopts the technical scheme of the low-melting alloy energy-conserving and environment-protective smelting furnace of alcohol-group fuel heating, comprise the crucible of being located in the body of heater and the burner that crucible is heated, difference is that described body of heater comprises outer furnace shell from outer to inner, middle heat-insulation layer and inboard wall of burner hearth, described burner hearth cavity matches with the crucible profile, keep the even interval of 20mm～40mm to form heating chamber between the two, the capping suitable for reading of heating chamber also arranges exhaust outlet; Adopt the burner of alcohol-group fuel to be positioned at crucible bottom, adopt 1 point (locating) or the controlled setting of multiple spot (locating), described each burner comprises the combustion chamber of the coaxial setting of from-inner-to-outer, inner bag and outer cover, form the wind chamber between inner bag and the outer cover, offer the air inlet that is communicated with blower fan by airduct on the described outer cover, offer acclivitous air vent from outer to inner (can make the whirlwind that produces in the inner bag from bottom to top around combustion chamber) on the described side wall of inner, be provided with in the described inner bag by oil pipe and be communicated with the fuel oil mouth of alcohol-group fuel feeding mechanism and form the electronic ignition pin of pulse firing with the fuel oil mouth.

The carborundum heat-storing material moulding that the preferred good heat conductivity of described inboard wall of burner hearth, high temperature oxidation resisting and thermal capacitance are large is made.

According to metal smelting crucible size and size of burner hearth, the thickness of described inboard wall of burner hearth is chosen as 40mm～300mm.

Reach preferably combustion efficiency for forming suitable whirlwind, the air vent on the described burner side wall of inner is matrix to be arranged, and the axis of air vent and horizontal angle are chosen between 8 °～15 °, and angle is chosen between 12 °～25 ° longitudinally.

For cooperating cyclone effect in the inner bag, described combustion chamber is tapered reducing from bottom to top, and taper ratio is 1:10～1:20.

The blast pipe that described exhaust outlet is installed bends towards crucible, takes full advantage of metal in the fume afterheat heating crucible.

Compared with prior art, the utility model has the advantage of:

1, the utility model energy-conserving and environment-protective smelting furnace adopts the alcohol-group fuel heating, and alcohol-group fuel can obtain n vaporization and n burning in the process of external diffusion in burner, obtain completing combustion; The heat that produces begins to the distance that is discharged from the process from burner combustion, and the time that heat is detained is long, is conducive to inboard wall of burner hearth and crucible and absorbs heat.

2, inboard wall of burner hearth of the present utility model, high temperature oxidation resisting good by heat conduction and the larger heat-storing material carborundum forming of thermal capacitance, and with the crucible near distance, the flame of burner ejection forms hot pressing crucible is heated for the first time; Heat forms the waveform concussion crucible is heated for the second time and inboard wall of burner hearth is heated; Utilize the characteristics that the carborundum specific heat capacity is high, thermal conductivity is good, can add high flame during beginning, the rapid endothermic temperature of inboard wall of burner hearth raises, then inboard wall of burner hearth heats for the third time to crucible, so that crucible is rapidly heated, can realize that in smelting process a small amount of fuel supply can obtain to smelt required temperature, flame-out rear hearth has longer temperature retention time, can reach cost-effective purpose.

3, inboard wall of burner hearth of the present utility model heats up and is conducive to rapidly the decomposition combustion of alcohol-group fuel, thereby produces more heat, and then improves the thermal efficiency, fuel saving.

4, silicon carbide hearth inwall of the present utility model stable performance, thermal conductivity factor is high, thermal coefficient of expansion is little, makes burner with stainless steel, can effectively prolong the service life of smelting furnace, reduces maintenance cost.

5, the utility model can be realized smelting with fuel such as alcohol-group fuel diesel oil substitute, liquefied gas, coke, and is significant to the contribution of energy-saving, emission-reducing, environment friendly.

(4) description of drawings:

Fig. 1 is the structural representation of a kind of embodiment of the utility model.

Fig. 2 is the cutaway view of Fig. 1.

Fig. 3 (a) is the structural representation of burner among Fig. 2.

Fig. 3 (b) is the top view of Fig. 3 (a).

Figure number sign: 1, body of heater; 2, crucible; 3, burner; 4, outer furnace shell; 5, intermediate layer heat insulation foam; 6, inboard wall of burner hearth; 7, combustion chamber; 8, inner bag; 9, outer cover; 10, airduct; 11, blower fan; 12, air inlet; 13, air vent; 14, fuel oil mouth; 15, electronic ignition pin; 16, blast pipe; 17, oil pipe; 18, flame; 19, roller; 20, access door; 21, observe fenestra; 22, air-valve; 23, fuel tap.

(5) specific embodiment:

Below in conjunction with accompanying drawing the technical solution of the utility model is described further:

The utility model adopts the low-melting alloy energy-conserving and environment-protective smelting furnace of alcohol-group fuel heating (take the supporting smelting furnace of T80 type Aluminum press casting apparatus as example, 0.1 cubic metre of crucible 2 volume, smelting aluminium weight 250kg) main body is square furnace 1, hollow part in the body of heater 1 is burner hearth, strip crucible 2 is set in the burner hearth, the furnace wall of described body of heater 1 (diapire and sidewall) is three-decker, from outer to inner be respectively the thick iron-clad of outer furnace shell 4(10mm), the thick carborundum heat-storing material of intermediate layer heat insulation foam 5 and inboard wall of burner hearth 6(40mm～70mm), described inboard wall of burner hearth 6 and crucible 2 profiles coupling, maintain uniform 20mm～40mm interval between the two, this spacer region is the flame heating region, described crucible 2 outside flangings suitable for reading are horizontally placed on the body of heater 1 top thermal insulation layer, the flame heating region is sealed, exhaust outlet is offered on crucible 2 flangings next door, and blast pipe 16 is installed on the exhaust outlet, and described blast pipe 16 bends towards crucible 2, described exhaust outlet and blast pipe 16 be quantification and layout as required, such as Fig. 1, shown in Figure 2.

Heater of the present utility model adopts the burner 3 take alcohol radical as fuel, and according to the needs of smelting aluminium, 2 controlled burners 3 are embedded in the body of heater 1 in both sides, crucible 2 bottom, and the port of burner 3 exposes inboard wall of burner hearth 6, as shown in Figure 2.

Each burner 3(adopts stainless steel to make) comprise combustion chamber 7, inner bag 8 and the outer cover 9 of coaxial setting, described combustion chamber 7 is tapered reducing from bottom to top, and taper ratio is 1:10～1:20, and the top of combustion chamber 7 is stretched out inner bag 8 and is entered in the space that is surrounded by fire-resistant ring; Form " recessed " shape wind chamber between described inner bag 8 and the outer cover 9, outer cover 9 bottoms are provided with air inlet 12, and air inlet 12 is communicated in the blower fan 11 of below, body of heater 1 bottom by airduct 10; Offer on inner bag 8 sidewalls and be the air vent 13 that matrix is arranged, described air vent 13 is inclined upwardly to inwall from low to high from outer wall, make the air that enters inner bag 8 form take combustion chamber 7 as rotating shaft from bottom to top whirlwind, the axis of described air vent 13 and horizontal angle are 8 °～15 °, with angle longitudinally be 12 °～25 °; On described outer cover 9 sidewalls fuel oil mouth 14 and electronic ignition pin 15 are set, the front end of described fuel oil mouth 14 and electronic ignition pin 15 enters in the inner bag 8 and forms pulse firing, the alcohol-group fuel feeding mechanism that fuel oil mouth 14 is communicated with outside the body of heater 1 by oil pipe 17, electronic ignition pin 15 is located at pulse ignition device on the body of heater 1 by connection, shown in Fig. 2, Fig. 3 (a), Fig. 3 (b).

Described body of heater 1 bottom is equipped with walking roller 19, offer the access door 20 of installation and maintenance blower fan 11 and airduct 10 on body of heater 1 lower sides, offer the observation fenestra 21 that detects flame 18 combustion cases in the burner hearth on the body of heater 1 middle part sidewall, the air-valve 22 of control airduct 10 air quantity and the fuel tap 23 of control oil pipe 17 oil masses also are located on body of heater 1 sidewall, as shown in Figure 1 and Figure 2.

During the utility model work, the flame 18 that ejects from the inner bag 8 of burner 3 can paste crucible 2 bottoms under the drive of air-flow helically shaped gradually to external diffusion, the heat conduction rapidly, the very fast even rising of temperature of flame heating region in the burner hearth, fuel can obtain repeated vaporization and repeated combustion in the process of external diffusion, so that fuel can completing combustion in burner hearth.Burned flame 18 forms thermal pressure to crucible 2 heating, because near distance, heat became the waveform concussion to crucible 2 and inboard wall of burner hearth 6 heating before this, utilize the large characteristics of the good thermal capacitance of carborundum heat conduction, can add high flame during beginning, the rapid endothermic temperature of the carbofrax material of inboard wall of burner hearth 6 raises (fire box temperature can surpass 900 ° of C), then inboard wall of burner hearth 6 and combustion flame 18 are simultaneously to crucible 2 heating, so that crucible 2 is rapidly heated (temperature can surpass 700 ° of C in the crucible), in smelting process, can regulate a small amount of fuel supply and can obtain to smelt required temperature, flame-out rear hearth has longer temperature retention time, realize low-calorie alcohol-group fuel heating smelting low-melting alloy, reach cost-effective purpose.

Claims (6)

1. adopt the low-melting alloy energy-conserving and environment-protective smelting furnace of alcohol-group fuel heating, comprise the crucible (2) of being located in the body of heater (1) and the burner (3) that crucible (2) is heated, it is characterized in that: described body of heater (1) comprises and from outer to inner is respectively outer furnace shell (4), intermediate layer heat insulation foam (5) and inboard wall of burner hearth (6), described inboard wall of burner hearth (6) inner chamber matches with crucible (2) profile, keep the even interval of 20mm～40mm to form heating chamber between the two, the capping suitable for reading of heating chamber also arranges exhaust outlet; Adopt the burner (3) of alcohol-group fuel to be positioned at crucible (2) bottom, adopt one or more controlled settings, described each burner (3) comprises the combustion chamber (7) of the coaxial setting of from-inner-to-outer, inner bag (8) and outer cover (9), form the wind chamber between inner bag (8) and the outer cover (9), offer the air inlet (12) that is communicated with blower fan (11) by airduct (10) on the described outer cover (9), offer from outer to inner acclivitous air vent (13) on described inner bag (8) sidewall, be provided with in the described inner bag (8) by oil pipe (17) and be communicated with the fuel oil mouth (14) of alcohol-group fuel feeding mechanism and form the electronic ignition pin (15) of pulse firing with fuel oil mouth (14).

2. the low-melting alloy energy-conserving and environment-protective smelting furnace of described employing alcohol-group fuel heating according to claim 1, it is characterized in that: described inboard wall of burner hearth (6) is made of the large carborundum heat-storing material moulding of good heat conductivity, high temperature oxidation resisting and thermal capacitance.

3. the low-melting alloy energy-conserving and environment-protective smelting furnace of described employing alcohol-group fuel heating according to claim 2, it is characterized in that: the thickness of described inboard wall of burner hearth (6) is 40mm～300mm.

4. the low-melting alloy energy-conserving and environment-protective smelting furnace of each described employing alcohol-group fuel heating according to claim 1～3, it is characterized in that: described air vent (13) is matrix and arranges, the axis of air vent (13) and horizontal angle are 8 °～15 °, with angle longitudinally be 12 °～25 °.

5. the low-melting alloy energy-conserving and environment-protective smelting furnace of described employing alcohol-group fuel heating according to claim 4, it is characterized in that: described combustion chamber (7) is tapered reducing from bottom to top, and taper ratio is 1:10～1:20.

6. the low-melting alloy energy-conserving and environment-protective smelting furnace of each described employing alcohol-group fuel heating according to claim 1～3, it is characterized in that: the blast pipe (16) that described exhaust outlet is installed bends towards crucible (2).

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