CN2416101Y - Coal-combustion heating furnance for cracking still - Google Patents

Abstract

The utility model belongs to a coal-combustion heating furnace for cracking stills, which reclaims fuel oil by cracking waste and old plastics. The coal-combustion heating furnace comprises a furnace body, a furnace chamber, a heating chamber provided with a flow guide column and a hole-shaped heat resistance partition board, a fire entering path by which the furnace chamber and the heating chamber are communicated, and an annular smoke chamber arranged between a furnace shell and a side wall of a still body. The heating furnace has the characteristic that the coal-combustion heating furnace can effectively prolong the service life of plain carbon steel cracking stills, enhance the heat efficiency and the productivity of the cracking stills, reduce the cost of producing fuel oil by utilizing waste and old plastics, etc. Consequently, the defect of traditional coal-combustion furnaces are easy to cause the bottom of the still to be corroded and deformed, and have short service, lower productivity of fuel oil reclamation is overcome.

Description

Cracking still coal firing process furnace

The utility model belongs to a kind of coal furnace, and particularly a kind of waste or used plastics that utilizes is produced oil fuel coal firing process furnace, especially is suitable as the cracking still process furnace that utilizes the technics of reclaim of plastic waste fuel oil and uses.

To the cracking still heating, process furnace commonly used has oil oven, gas furnace, electrothermal oven and coal furnace etc.Adopting cracking still is the low molecular hydrocarbon class with the waste or used plastics catalytic pyrolysis, recycles with the form of fuel oil, has become the effective way that technics of reclaim of plastic waste is utilized.But adopting its fuel costs of heating pyrolyze still such as gas furnace, electrothermal oven to assign in the fuel oil production cost that reclaims accounts for about 30% and 54%.Adopt the former profit atomic, and adopt the latter will cause heavy losses.Therefore, all cannot apply.If adopt the coal furnace heating, it is about 7% of fuel oil production cost only that its consume fuel is taken, and profit then can reach about 35%, considerable benefit.Yet catalytic pyrolysis waste or used plastics general requirement temperature about 400 ℃, the plastics poor thermal conductivity, often temperature need reach 800～1000 ℃ of ability and satisfies the temperature of scission reaction in the still and the requirement of productivity at the bottom of the still.Conventional coal furnace is because directly to heating at the bottom of the still, under this hot environment, local deformaton taken place at the bottom of easily causing still, adds in the high-temperature flue gas behind the coal combustion to be rich in corrosive gases such as SO ₂, CO ₂, NO, HO etc. are to producing the intensive corrosion at the bottom of the still; Therefore, have a strong impact on the work-ing life of reactor and the production cost of fuel oil.

But the purpose of this utility model is at the bottom of a kind of even heating still of above-mentioned defective design, but the cracking still of the external side of heating kettle coal firing process furnace again, do the also not perishable and distortion of cracking still even adopt plain carbon stool, to reach the work-ing life that prolongs cracking still, boost productivity, reduce technics of reclaim of plastic waste and utilize purposes such as cost.

Solution of the present utility model is to adopt reflective roasting kiln, the heating chamber (heat exchange chamber) of roasting kiln burner hearth and heating pyrolyze still is separated be provided with, and is communicated with by quirk between the two; The quincunx fire that is provided with falls into and the high-temperature flue gas diversion column in heating chamber, and the hole shape fire rated partition is set up in the contact position at the bottom of heating chamber upper oral part and cracking still, with nonuniform heating problem at the bottom of the solution traditional heating stove still; High-temperature flue is set so that the kettle sidewall is heated in heating chamber top kettle exterior annular, kettle integral body is heated evenly, and improves its thermo-efficiency, thereby realize its purpose from the effusive high-temperature flue gas of heating chamber.Therefore, the utility model comprises body of heater, burner hearth and is divided into upper and lower coal filling hole of burner hearth and ash output hole; Key is also to be provided with one and is used for the heating chamber of heating pyrolyze still and advances quirk with what this heating chamber was communicated with burner hearth in body of heater, the contact position also is provided with a hole shape fire rated partition at the bottom of the upper oral part of heating chamber and cracking still, and between the heating chamber top kettle outside and furnace shell, also being provided with an annular smoke chamber, heating chamber is communicated with this annular smoke chamber by high-temperature flue; Heating chamber be located at the burner hearth upper lateral part and the seat on base.For at the bottom of making the flame and high-temperature flue gas even heating still that enters heating chamber, in heating chamber, also be provided with flame and High Temperature Gas diversion column.In order to improve the intensity of hole shape fire rated partition, between heating chamber center and hole shape fire rated partition, also be provided with a pillar stiffener.

The utility model will be separated setting to the heating chamber and the burner hearth of cracking still heating, and diversion column etc. will be set in heating chamber owing to adopt reflective coal furnace.Make thermal-flame and flue gas enter heating chamber after the water conservancy diversion of diversion column and viscous flow effect, evenly cloth is distributed in the heating chamber, part by the hole on the hole shape fire rated partition to still at the bottom of direct heating, part is conducted heat by dividing plate, thereby effectively avoided traditional type of furnace because furnace flame and corrosive gases directly impact heating at the bottom of the still, caused local deformaton and oxidation corrosion at the bottom of the still; Between kettle sidewall and furnace shell, set up annular smoke chamber, make the high-temperature flue gas of exporting in the heating chamber through utilizing once more to the heating of the kettle outside, both enlarged the heating surface of kettle, it is heated evenly, improve thermo-efficiency again, solved the problems such as raising that influence its productivity because of plastics thermal conduction difference to a certain extent.Therefore, the utlity model has the work-ing life that can effectively prolong the plain carbon stool cracking still, improve the thermo-efficiency and the productivity of cracking still, reduce the characteristics such as cost of utilizing waste or used plastics to produce fuel oil.

Accompanying drawing and description of drawings

Fig. 1. be the utility model structural representation;

Fig. 2 is vertical view (an A-A view).

1. bodies of heater among the figure, 2. burner hearth, 3. coal filling hole 4. advances quirk, 5. thermal insulation layer, 6. annular smoke chamber, 7. cracking still 8. heating chambers, 9. diversion column, the 10. heat-resisting dividing plate of hole shape, 11. furnace shells, 12. high-temperature flue, 13. bases, 14. pillar stiffeners, 15. grates, 16. ash output holes.

Embodiment

Present embodiment with diameter be φ 600mm cracking still supporting be example with coal stove, body of heater 1. long 3120mm, wide 2240mm, whole grate adopt 63 * 63 * 5mm angle steel to be welded; Burner hearth 2. internal diameter φ 1000mm, high 1200mm; Heating chamber 8 diameter phi 1400mm, the bottom is the inclined-plane, depends on the into high 250mm of quirk 4 ends, the high 190mm of its symmetry end, quincunx totally 37 of the diversion columns 8 that are provided with in the chamber, this diversion column the utility model adopts refractory brick, central support posts 14 diameter phi 200mm; The heat-resisting dividing plate 10 thick 35mm of hole shape, diameter phi 1500mm, wherein each through-hole diameter is middle 16mm, is close at the bottom of this plate and the still during use; Annular smoke chamber 6 external diameter φ 1840mm are communicated with heating chamber 8. with the symmetrically arranged high-temperature flue 12 of transverse axis (X-axis) by two; Furnace shell 11. internal layers adopt refractory brick, and skin or middle layer are provided with thermal insulation layer 5.Bunker coal is jealous of in the thorax by coal filling hole 3. addings during use, and thermal-flame and flue gas that burning is produced enter heating chamber 8. at diversion column 9 through advancing quirk 4.Effect under to even heating at the bottom of the still, the high-temperature flue gas after the heating flows into annular smoke chamber 6 through aft mounted two high-temperature flues of heating chamber 12 and continues sidewall heating to cracking still 7, tail gas is discharged from the chimney of being located at the body of heater side roof part then.

Claims (3)

1. a cracking still coal firing process furnace comprises body of heater, burner hearth and is divided into upper and lower coal filling hole of burner hearth and ash output hole; It is characterized in that also being provided with in the body of heater one is used for the heating chamber of heating pyrolyze still and advances quirk with what this heating chamber was communicated with burner hearth, the contact position also is provided with a hole shape fire rated partition at the bottom of the upper oral part of heating chamber and cracking still, and between the top of the heating chamber kettle outside and furnace shell, also being provided with an annular smoke chamber, heating chamber is communicated with this annular smoke chamber by high-temperature flue; Heating chamber be located at the burner hearth upper lateral part and the seat on base.

2. by the described cracking still of claim 1. coal firing process furnace; It is characterized in that also being provided with in the described heating chamber flame and high-temperature flue gas diversion column.

3. by the described cracking still of claim 1. coal firing process furnace; It is characterized in that between heating chamber center and hole shape fire rated partition, also being provided with a pillar stiffener.

Images