CN2056158U

CN2056158U - Low-temp. cracking open-hearth coke-oven for coal

Info

Publication number: CN2056158U
Application number: CN89208593U
Authority: CN
Inventors: 曹毓民; 贺挨扬
Original assignee: SHANXI DEVEL CENTRE OF COAL PROCESSING AND CONVERSION TECHNOLOGY
Current assignee: SHANXI DEVEL CENTRE OF COAL PROCESSING AND CONVERSION TECHNOLOGY
Priority date: 1989-06-15
Filing date: 1989-06-15
Publication date: 1990-04-18

Abstract

The utility model relates to a low-temperature cracking open-hearth coke-oven for coal of low-temperature tar, coal gas, and semi coke. A combustion chamber (1) and a carbonization chamber (2) are separated, and chamber walls (3) with heterotype thin wall silica bricks are arranged between two chambers; the heat energy of the combustion chamber is conducted to the carbonization chamber (2) through chamber walls (3); the coke temperature is controlled in the range of 550-700DEG C. After the gas is burned and an air accumulation flue duct (10) is collected, high-altitude emission and exhaust emission conform to national environmental protection standard completely. The furnace structure is simple, and the steel dosage is little; an automatic blanking coke outlet is arranged at both sides of the furnace body without using coke pushers. The coke quenching water and the tar processing waste water form a closed-circuit circulation system without external exhaust and infiltration. The amount of investment of ton coke is low, the amount of investment of recovery system is 25 yuan per ton, and the low-temperature cracking open-hearth coke oven is only one fifteenth of wood furnace.

Description

Low-temp. cracking open-hearth coke-oven for coal

The utility model belongs to a kind of vertical pit kiln that has heat exchange.It is the coal low-temperature pyrolysis semi-coke oven of external-heat.

Known low-temperature pyrolysis stove has strange three sections stoves in Shandong and Wood stove etc., its complex structure, and cost is very high.Single group is produced the Wood stove of 120,000 tons of semicokes, daily output coal gas 6.5 ten thousand steres, nearly hundred million yuan of its gross investments per year.This low-temperature pyrolysis stove is to produce coal gas simultaneously, and furnace temperature is higher, and the tar of recovery is medium and high temperature oil, and based on the recoveryization product, its rate of recovery is lower.

General native semi-coke oven, though simple in structure, cost is lower, the coal gas that produces in the process of coking, tar all can not be recycled, make that environmental pollution is serious, the wasting of resources is very big, its char yeild only is about 50%, and furnace temperature is restive simultaneously, unstable product quality, economic benefit is lower.

The purpose of this utility model provides a kind of simple in structure, and is cheap, can produce the coal low-temperature pyrolysis semi-coke oven that semicoke can reclaim the coalitenessity oil and gas again.

For achieving the above object, shown in accompanying drawing 1, accompanying drawing 2, combustion chamber (1), coking chamber (2) are separated, and form vertical coal low-temperature pyrolysis semi-coke oven by combustion chamber, the coking chamber porous form that is staggered.The locular wall (3) that special-shaped thin wall silica brick is arranged between combustion chamber (1) and the coking chamber (2), give coking chamber (2) by locular wall (3) with the thermal energy conduction of combustion chamber, after the high heating value low temperature coal gas that generates during destructive distillation compiles, reclaim semi coking tar through cooling condensation, scrubbed gas some after the recovery is used as the thermal source of combustion chamber, and remaining scrubbed gas is used for processing the separation semi coking tar and other thermal source supplies outward.Undertaken by reinforced, preheating, destructive distillation, the supervisor that discharges of the coke respectively during production, the coal gas stable heating is realized working continuously.

Multilayer baffling burning structure (as shown in Figure 3) is adopted in combustion chamber (1), thereby strengthened burning area, and be provided with secondary air regulating port (6), after coal gas fully burns in the combustion chamber, compile by furnace roof gas collection flue (10), through the smokestack high altitude discharge, exhaust gas emission meets national environmental standard fully.By regulating the coal gas input of scrubbed gas import (7), control burning room temp.

Coking chamber (2) volume is big (as shown in Figure 4), by regulating the coal gas input of combustion chamber, make the pyrolysis temperature in the coking chamber remain on 550-700 ℃, and safety regulation and control plate (9) arranged at the gas exit place, make discharge of the coke, air and coal gas isolation when reinforced.There is down the automatic blanking coke outlet (14) of " V " font the furnace bottom both sides, when the discharging of the coke, enter hurdle Jiao, quenching car without pushing machine, automatic blanking, are transported to coke quenching tower through track, the spray quenching.The waste water that coke quenching water can make full use of after tar processing separates replenishes, and makes coke quenching water and tar processing waste water form closed circuit circulatory system, does not efflux, does not ooze down.Its insufficient coke quenching water is by the waterworks supply.

Feed coal of the present utility model produces the low temperature coal gas of 120 mark cubic meters and accounts for into stove coal charge 6%(weight % in the time of can adopting piece charcoal (weakly caking coal, bottle coal, brown coal etc.) or coal dust to mix to join the moulded coal of partly coking coal moulding to go into stove, coal low-temperature pyrolysis per ton) semi coking tar, char yeild is at 65-70%.

Advantage of the present utility model and positively effect are: realized the coproduction of semi coking tar, coal gas and semicoke with simple structure, its tar yield is higher.Furnace binding is simple, rolled steel dosage is few, and automatic blanking discharges of the coke, without pushing machine.Coke quenching water and tar processing waste water form closed circuit circulatory system, do not efflux, do not ooze down, and exhaust gas emission meets environmental protection standard, thereby has improved environmental pollution.The burnt investment cost of ton is low, comprises that the burnt investment of ton of recovery system only is about 25 yuan/ton, has only 1/15th of Wood stove investment.

Embodiment accompanying drawings of the present utility model is as follows:

Fig. 1 is a front view of the present utility model.(1) is that combustion chamber, (2) are that coking chamber, (5) are lighting-up tuyeres among the figure, and (6) are the secondary air regulating ports, and (7) are combustion chamber scrubbed gas imports, and (12) are the dry distillation gas arms, and (14) are the automatic blanking coke outlets.

Fig. 2 is the arrangement synoptic diagram of combustion chamber and coking chamber.(1) is the combustion chamber among the figure, and (2) are coking chambers, and (3) are the special-shaped thin wall silica brick locular walls between combustion chamber and the coking chamber.

Fig. 3 is the A-A sectional view of Fig. 1, the i.e. structural representation of combustion chamber.(4) are igniting chambers among the figure, during blow-on, by igniting chamber (4) combustion chamber (1) are given heat after certain temperature, sealing igniting chamber, coke oven operate continuously under hot state.Special-shaped thin wall silica brick locular wall (3) is given coking chamber (2) with thermal energy conduction, after coal charge in the coking chamber is heated, organic flammable volatile matter in the coal, when destructive distillation, generate the low temperature coal gas of high heating value, and produce a certain amount of semi coking tar based on straight-chain paraffin and naphthenic hydrocarbon, the scrubbed gas of coal gas after cooling condensation reclaims semi coking tar, a part of thermal source as the combustion chamber, all the other coal gas are used for processing the separation semi coking tar and other thermal source supplies outward, formation is fed in raw material, is given heat, destructive distillation, discharges of the coke, the operate continuously system of coal gas stable heating.(6) be secondary air regulating port, (7) be scrubbed gas inlet, (8) be ash removing hole, (9) be safety regulation and control plate, make discharge of the coke, air and coal gas isolation when reinforced, (10) be the gas collection flue, after coal gas after the burning compiles by the gas collection flue, through the smokestack high altitude discharge, (11) are vision slits.

Fig. 4 is the B-B sectional view of Fig. 1, i.e. coking chamber structural representation.(13) are charging openings among the figure, and (14) are coke outlets, discharge of the coke simultaneously in the stove both sides.

Claims

1, the external-heat coal low-temperature pyrolysis semi-coke oven that separates of a kind of combustion chamber (1) and coking chamber (2), it is characterized in that, combustion chamber, coking chamber are that porous is staggered, the locular wall (3) that special-shaped thin wall silica brick is arranged between combustion chamber (1) and the coking chamber (2), in the combustion chamber (1) is multilayer baffling burning structure, at the gas exit place of coking chamber (2) regulation and control plate (9) is arranged, there is down the automatic blanking coke outlet (14) of " V " font the body of heater both sides.