CN106916598B - Dry distillation type tunnel type intermittent pyrolysis furnace - Google Patents
Dry distillation type tunnel type intermittent pyrolysis furnace Download PDFInfo
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 229
- 238000001816 cooling Methods 0.000 claims abstract description 93
- 239000007789 gas Substances 0.000 claims abstract description 83
- 238000007789 sealing Methods 0.000 claims abstract description 69
- 238000001035 drying Methods 0.000 claims abstract description 56
- 239000000112 cooling gas Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 67
- 239000003546 flue gas Substances 0.000 claims description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 30
- 238000003860 storage Methods 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 13
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- 239000000835 fiber Substances 0.000 claims description 9
- 239000000779 smoke Substances 0.000 claims description 9
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- 230000000149 penetrating effect Effects 0.000 claims description 2
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- 238000005265 energy consumption Methods 0.000 abstract description 3
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/02—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- Oil, Petroleum & Natural Gas (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a dry distillation type tunnel type intermittent pyrolysis furnace, which comprises a hot blast furnace and a tunnel type furnace body, wherein the furnace body is divided into a drying area, a pyrolysis area, a cooling area and a movable net-shaped furnace frame; a hot air inlet and a moisture outlet are arranged on the furnace body of the drying area, and a drying area door is arranged at the inlet of the drying area; a cooling gas inlet and a cooling gas outlet are arranged on two sides of the furnace body of the cooling area, and a cooling area door is arranged at the outlet of the cooling area; sealing doors are arranged at the junction of the drying zone and the pyrolysis zone and at the junction of the pyrolysis zone and the cooling zone; the hot blast stove comprises a body, a burner, a chimney and a pyrolysis gas pipe, wherein pyrolysis gas is introduced into the pyrolysis gas pipe, and an outlet of the pyrolysis gas pipe is communicated with the side wall of one end of the pyrolysis zone, which is positioned in the cooling zone; an exhaust port is arranged on the pyrolysis zone. The invention integrates three independent process steps of traditional treatment into an integrated device by using a tunnel type pyrolysis furnace, and the three regions work circularly, thus having short production period, long service life, wide application temperature range and low energy consumption.
Description
Technical Field
The invention belongs to biomass fuel pyrolysis equipment, is also suitable for high-temperature sintering of ceramics, refractory bricks, metals and the like, and particularly relates to a dry distillation type tunnel type intermittent pyrolysis furnace.
Background
The inventor researches a biomass pyrolysis technology from 2008, develops a series of pyrolysis furnaces, including a biomass pyrolysis furnace, and has patent numbers: ZL 201110006196.1; a pyrolysis furnace for preventing oxidation, patent No.: ZL 200920062938.0; a biomass pyrolysis furnace, patent No.: ZL 201220031587.9; a biomass pyrolysis furnace, patent No.: ZL 201120357176.4.
The pyrolysis furnace designed by the inventor before is provided with a net-shaped furnace pipe in the furnace, the bottom surface of the furnace pipe and the periphery of the furnace pipe are provided with a plurality of meshes, a steam exhaust layer is arranged between the furnace pipe and the inner wall of the furnace shell, one end of a smoke pipe is connected with the furnace shell, the other end of the smoke pipe is connected with a recovery tower, and the technical problem of biomass fast pyrolysis is well solved. A furnace pipe of 6 cubic meters is filled with 1.2 tons of bamboo joints, and only 6 hours are needed from ignition to carbon conversion, which is more than 10 times faster than the prior art. However, the prior art has the following defects:
1. continuous pyrolysis cannot be realized, a large amount of energy is consumed in the cooling process, and a large amount of cooling time is occupied.
2. In the prior art, water is generally added for rapid cooling, the furnace body material cannot bear the working environment of rapid cooling and rapid heating, and the service life is short.
3. Charcoal having a high pyrolysis temperature (e.g., 1200 c) cannot be produced.
4. The heat energy of the high-temperature flue gas is directly discharged out of the furnace body and is cooled by water, and the high-temperature flue gas is not used for pyrolysis, so that a large amount of energy is wasted. All conventional biomass pyrolysis techniques are no exception.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a dry distillation type tunnel type intermittent pyrolysis furnace which can ensure the temperature in the furnace, is easy and convenient to operate, and has good sealing performance.
The technical scheme for solving the problems is as follows: a dry distillation type tunnel type intermittent pyrolysis furnace comprises a hot blast furnace and a tunnel type furnace body, wherein the furnace body is sequentially divided into a drying area, a pyrolysis area and a cooling area, and a movable net-shaped furnace frame used for filling materials to be heated is arranged in the furnace body;
a hot air inlet and a moisture outlet are arranged on a furnace body of the drying area, a drying area door is arranged at the inlet of the drying area, and a driving mechanism for driving the reticular furnace frame to move is arranged outside the drying area door;
a cooling gas inlet and a cooling gas outlet are arranged on two sides of the furnace body of the cooling area, and a cooling area door is arranged at the outlet of the cooling area;
sealing doors capable of completely isolating the pyrolysis zone into a closed cavity are arranged at the junction of the drying zone and the pyrolysis zone and at the junction of the pyrolysis zone and the cooling zone;
the hot blast stove comprises a body, a burner connected with one end of the body, a chimney connected with the other end of the body and a pyrolysis gas pipe arranged in the body, wherein pyrolysis gas for pyrolyzing a substance to be heated is introduced into the pyrolysis gas pipe, and an outlet of the pyrolysis gas pipe is communicated with the side wall of the pyrolysis zone at the end of the cooling zone;
and an exhaust port is arranged on the side wall of the pyrolysis zone at the end of the drying zone.
In the scheme, the tunnel furnace body is adopted for continuous heating. The hot blast stove is arranged outside the tunnel-type furnace body, and pyrolysis gas is input into the pyrolysis area through a pipeline, so that the investment can be reduced, and the maintenance is convenient.
Furthermore, the inlet of the pyrolysis gas pipe is connected with a pyrolysis gas storage tank through a pipeline, the gas outlet of the pyrolysis area is connected with a gas-oil separation tower, and the pyrolysis gas storage tank is connected with the gas-oil separation tower.
In the scheme, when the equipment is started, air is introduced from the outside to enter the pyrolysis zone, pyrolysis gas is formed after the pyrolysis zone carries out one cycle of cyclic pyrolysis, and then the introduction of the outside air is stopped. The formed pyrolysis gas enters the oil-gas separation tower from the exhaust port, the condensable gas is cooled, the non-condensable gas enters the pyrolysis gas storage tank, one part of the non-condensable gas can be used as fuel, the other part of the non-condensable gas is introduced into the hot blast stove to be heated, and then enters the pyrolysis zone, and the circulation is repeated. The design can fully recycle the pyrolysis gas without waste.
Preferably, the pyrolysis gas pipe in the hot blast stove is a pipe bundle consisting of a plurality of parallel small pipes, the hot blast stove body is internally provided with a plurality of pipe bundles at intervals along the axis, and the adjacent pipe bundles are sequentially communicated end to end.
The pyrolysis gas is respectively introduced into different small tubes and is dispersed to be more beneficial to heating.
Furthermore, the chimney is communicated with the outside, and a flue gas storage tower is connected to the chimney in a branching manner and is connected with a cooling gas inlet;
the cooling gas outlet is connected with a heat exchanger through a pipeline, and the heat exchanger is connected with the flue gas storage tower through a pipeline.
In the above further improved scheme, the cooling gas is cooled by smoke circulation, so that waste utilization is realized. After the flue gas is discharged from the chimney, one part of the flue gas is discharged, the other part of the flue gas enters the flue gas storage tower, the flue gas in the flue gas storage tower enters the cooling area from the cooling gas inlet for cooling, then the flue gas with higher temperature is discharged from the outlet of the cooling area and enters the heat exchanger for cooling the flue gas, the cooled flue gas is introduced into the flue gas storage tower again, the cooled flue gas entering the flue gas storage tower can enter the cooling area again, and the circulation is carried out.
Furthermore, the hot blast stove body comprises a hollow shell, heat insulation cotton is lined in the shell, and refractory bricks are laid on the inner wall of the heat insulation cotton.
Preferably, spoilers are arranged on the inner walls of the two sides of the furnace body of the pyrolysis zone at intervals respectively, and the spoilers on the two opposite sides are arranged in a cross mode, so that high-temperature pyrolysis gas can collide with the spoilers to block the spoilers to form a broken-line path to flow.
The design of the spoiler can guide the high-temperature pyrolysis gas to advance in a broken line mode, and the temperature of the pyrolysis gas is gradually reduced. Thus, the materials to be heated are contacted orderly and fully, the reaction is full, the energy consumption is lower, and the heat loss is small.
Furthermore, conveying lines for conveying the net-shaped furnace frame are arranged at the bottoms in the furnace bodies of the pyrolysis zone and the drying zone, each conveying line consists of a plurality of rollers which are arranged in parallel at intervals, each roller comprises a roller shaft and a roller fixedly sleeved on the roller shaft, and a sliding part capable of sliding along the roller is arranged at the bottom of the net-shaped furnace frame;
the cooling area adopts a chain wheel conveying line; and the conveying lines at the junction of the drying area and the pyrolysis area and at the junction of the pyrolysis area and the cooling area are disconnected, and the disconnected width is greater than the thickness of the sealing door.
In the above scheme, the purpose of cutting off the conveying line is to accommodate the sealing door and enable the sealing door to be smoothly sealed in place. The sliding part can adopt angle steel, the width of the angle steel is slightly larger than that of the roller, and the angle steel is placed on the roller during sliding.
Because the pyrolysis zone is in a high-temperature state for a long time, in order to prevent the service life of parts from being reduced in the high-temperature state, in the pyrolysis zone, two ends of a roll shaft are fixed on the wall of the furnace body through bearing assemblies, the outer surfaces of the bearing assemblies are wrapped with water jackets, each water jacket is provided with a liquid inlet pipe and a liquid outlet pipe, and circulating cooling liquid is introduced into each water jacket;
the side surface of the roller is wrapped with a heat insulation layer, the roller shaft is a hollow shaft, and the outer surface of the roller shaft is wrapped with the heat insulation layer;
an air inlet branch pipe aligned with the hollow cavity of the roll shaft is arranged on the wall of the furnace body in the pyrolysis zone corresponding to one end of the roll shaft, and an air outlet branch pipe aligned with the hollow cavity of the roll shaft is arranged on the wall of the furnace body corresponding to the other end of the roll shaft;
a smoke pipe is connected to the exhaust port of the pyrolysis zone in a branching manner, the smoke pipe is connected with a cooling tower, the cooling tower is connected with an air inlet branch pipe through a pipeline, the air outlet branch pipe is connected with an induced draft fan through a pipeline, and the induced draft fan is connected with an oil-gas separation tower;
and the junction area of the roll shaft and the wall of the pyrolysis zone furnace body is filled and sealed by adopting a heat insulation material.
Among the above-mentioned scheme, let in the high temperature pyrolysis gas from the gas vent outflow in the tobacco pipe, the high temperature pyrolysis gas in the tobacco pipe cools off in the cooling tower, and in the refrigerated pyrolysis gas got into the branch pipe that admits air, then got into the hollow cavity of roller and cooled the roller, later discharged from the branch pipe of giving vent to anger, the pyrolysis gas of the higher temperature of branch pipe exhaust from giving vent to anger gets into the oil gas separation tower. The cooling of the roll shaft is thus carried out by means of pyrolysis gas circulation.
Preferably, a partition plate is arranged between two adjacent rollers in the pyrolysis zone, and the height of the partition plate is greater than or equal to the height of the centers of the rollers. The baffle can prevent that high temperature pyrolysis gas from directly flowing from the wheel passageway to ensured that high temperature pyrolysis gas moves along netted furnace frame, fully reacted with living beings and carried out the pyrolysis, improved energy efficiency and improvement pyrolysis speed.
Specifically, the sealing door comprises a bearing box body fixedly connected with the furnace body and communicated with the inner cavity of the furnace body;
a furnace door is arranged in the inner cavity of the box body, a sealing frame is fixed on one side of the furnace door close to the pyrolysis area, the sealing frame is a box-shaped structure formed by surrounding plates, and one side close to the pyrolysis area is completely opened; a sealing groove is formed in the inner wall of the box body, which is close to one side of the pyrolysis zone, and corresponds to the sealing frame, a high-temperature-resistant fiber mat is arranged in the sealing groove, and the sealing frame can be inserted into the sealing groove to form a sealing structure;
a spring is arranged between the inner wall of the box body at one side close to the pyrolysis zone and the furnace door, a push rod capable of moving back and forth is arranged at one side of the furnace door far away from the pyrolysis zone, and the push rod extends to the outside of the box body; the contact part between the ejector rod and the box body is filled with asbestos ropes;
also comprises a furnace door lifting mechanism for lifting the furnace door up and down.
In the above scheme, the box body is a supporting carrier for mounting each structural member. The furnace door is used for completely isolating the pyrolysis zone, the drying zone and the cooling zone, and the sealing frame and the sealing groove are matched to ensure the air tightness of the pyrolysis zone. The cooperation of spring and ejector pin mechanism can make the furnace gate along furnace body axial displacement, closes the furnace gate and tightly pushes up the furnace gate through the ejector pin, and the spring is compressed, loosens the ejector pin when opening the furnace gate, and the spring is opened the furnace gate by elasticity. The function of the asbestos cord is to prevent air leakage.
Furthermore, a water jacket for cooling is arranged on one side, close to the pyrolysis zone, of the box body, and a water jacket water inlet and a water jacket water outlet are formed in the water jacket;
the furnace door is of a hollow cavity structure, a water inlet pipe and a water outlet pipe are arranged at the top of the furnace door, the water inlet pipe is inserted into the lower part of the hollow cavity of the furnace door, a water inlet pipe connector and a water outlet pipe connector are arranged at the top of the box body, and the water inlet pipe connector, and the water outlet pipe connector are respectively communicated through hoses;
a high-temperature resistant fiber layer is arranged in the cavity of the sealing frame and is close to the furnace door;
the furnace door lifting mechanism comprises a first winch and a first water tank fixed on one side of the box body, the first winch is connected with the top of the furnace door through a steel wire rope penetrating through the wall of the box body, a pipeline is sleeved at a perforated part of the steel wire rope and the wall of the box body, one end of the pipeline is fixed with the wall of the box body and communicated with an inner cavity of the box body, the other end of the pipeline is immersed in the first water tank, and the steel wire rope penetrates through the pipeline.
In the scheme, the water jacket is designed for cooling the junction of the pyrolysis zone and the drying zone as well as the cooling zone; the design of the circulating water of the hollow cavity furnace door can cool the furnace door; the high temperature resistant fiber layer is used for heat insulation and isolating heat transferred to the furnace door from the pyrolysis zone.
Furthermore, the ejector pin includes the hydraulic stem and fixes the cooling rod at the hydraulic stem front end, the cooling rod includes the body of rod, the circulation circuit that sets up in the body of rod, set up on the body of rod and with the coolant liquid import and the coolant liquid export of circulation circuit intercommunication.
Because the hydraulic stem generally can not be high temperature resistant, set up the cooling rod in its front end and can guarantee that the hydraulic stem normally works and do not become invalid to guarantee the leakproofness of sealing door.
The working process of the pyrolysis furnace comprises the following steps:
(a) opening a drying area door, a cooling area door and two sealing doors; and pushing a plurality of movable net-shaped furnace frames which are sequentially abutted and filled with the substances to be heated into the furnace body from the drying area door, and closing two sealing doors of the pyrolysis area after the movable net-shaped furnace frames are sequentially arranged in the pyrolysis area.
The operation steps for closing the sealing door are as follows:
and opening the first winding machine to slowly put down the furnace door, pushing the furnace door towards the direction of the pyrolysis zone by using the ejector rod, compressing the spring, and inserting the sealing frame into the sealing groove.
(b) Pushing the movable netted furnace frame filled with the material to be heated again to fully discharge the material to be heated in the drying area, then closing the door of the drying area, introducing hot air into the drying area from the hot air inlet to dry the material to be heated, and discharging moisture from the moisture discharge port.
(c) The cooling zone door is closed.
(d) Aiming at different substances to be heated (biomass, household garbage, mineral substances, metal and the like), the temperature in the hot blast stove is adjusted according to specific conditions to maintain the set temperature (300-1200 ℃ can be maintained according to specific conditions), and the pyrolysis gas heated in the hot blast stove is introduced into a pyrolysis zone. The pyrolysis gas is guided by the spoiler to advance in a broken line until being discharged from the exhaust port, and then is sequentially and fully contacted with the material to be heated, so that the material to be heated is subjected to full pyrolysis reaction in the pyrolysis area, and the high-temperature pyrolysis gas is stopped being conveyed after the set time.
(e) And opening two sealing doors of the pyrolysis zone, starting a driving mechanism, pushing the dried substances to be heated in the drying zone into the pyrolysis zone, and simultaneously ejecting the same number of the pyrolyzed net-shaped furnace frames out of the pyrolysis zone along the same trend so as to enter the cooling zone.
The process of opening the sealing door is the reverse process of closing the sealing door in the step (a).
(f) And starting the chain wheel conveying line, moving the net-shaped furnace frame in the cooling area to the outlet direction of the cooling area for a certain distance (the distance is based on the fact that the sealing door can be freely put down), and closing the two sealing doors.
(g) The movable mesh-like oven frame filled with the substance to be heated is pushed again to fill the drying zone, and then the drying zone door is closed. Meanwhile, the cooled flue gas is introduced from the cooling gas inlet, and the cooled flue gas is discharged from the cooling gas outlet. In the process, high-temperature pyrolysis gas is continuously introduced from the hot blast stove to the pyrolysis zone to carry out pyrolysis reaction.
(h) After cooling, the door of the cooling area is opened, and the chain wheel conveying line is started to convey the reticular furnace frame in the cooling area to the outside. And (5) repeating the steps (e) to (h) after the reaction in the pyrolysis zone is finished, and continuously and circularly performing the procedures of drying, pyrolysis and cooling.
The invention has the following remarkable effects:
1. three independent process steps of traditional biomass, household garbage, mineral substances, metal and the like are creatively integrated into one integrated device by one tunnel type pyrolysis furnace, three areas work circularly, and the production efficiency is high and the period is short.
2. The temperature of the pyrolysis zone is always kept and is not cooled, so that a large amount of energy is saved.
3. The heat of the high-temperature pyrolysis gas is used as a pyrolysis energy source, namely the high-temperature pyrolysis gas moves towards the drying end along the tunnel, and the design of the spoiler can guide the high-temperature pyrolysis gas to advance in a broken line mode, so that the temperature of the pyrolysis gas is gradually reduced. Therefore, the biomass is contacted with the biomass orderly and fully, the reaction is sufficient, the energy consumption is lower, and the heat loss is small. For biomass in a certain netted furnace frame, pyrolysis gas with lower temperature is acted at the beginning, but as the biomass is queued to a position close to a pyrolysis gas pipe, the temperature of the flue gas is higher and higher, and the biomass in each frame can be fully pyrolyzed.
4. The traditional cooling mode is natural cooling, indirect cooling by adopting water or direct water splashing cooling, the cooling efficiency is low, and the time is long; direct water cooling also tends to pulverize the product. The invention creatively adopts the continuous circulation cooling of the flue gas in the field of biomass pyrolysis, has high cooling efficiency and truly realizes the utilization of waste gas.
5. The ejector rod with the cooling facility can tightly push the sealing door without failure, so that the sealing performance is ensured.
6. The conveying line formed by the rollers is matched with the chain wheel conveying line, and the conveying line bears the net-shaped furnace frame or the net-shaped plate, so that the pyrolysis substances are conveyed. Compared with the traditional conveying mode, the heating and cooling device has the advantages of fast heating, fast cooling, no need of consuming a large amount of energy, high efficiency, strong reliability and no need of frequent maintenance.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a view showing the entire system of a pyrolysis furnace according to the present invention.
FIG. 2 is a top view of a tunnel furnace body of the pyrolysis furnace of the present invention.
FIG. 3 is a top view of the interior of the stove body.
Fig. 4 is a cross-sectional partial sectional view of a pyrolysis zone.
FIG. 5 is a schematic diagram of the transfer lines for the pyrolysis zone and the cooling zone.
Fig. 6 is a front view of the sealing door structure.
Fig. 7 is a schematic view of the structure of the lift pin.
Fig. 8 is a partially enlarged view of the jack.
In the figure: 1-drying zone, 2-pyrolysis zone, 3-cooling zone, 4-furnace body, 5-mesh furnace frame, 6-sealing door, 11-hot air inlet, 12-moisture outlet, 13-drying zone door, 14-piston cylinder, 16-induced draft fan, 21-spoiler, 23-exhaust port, 31-cooling gas inlet, 32-cooling gas outlet, 33-cooling zone door, 61-box body, 62-furnace door, 63-sealing frame, 64-sealing groove, 65-high temperature resistant fiber mat, 66-spring, 67-ejector pin, 68-asbestos rope, 69-water jacket, 70-high temperature resistant fiber layer, 71-first winding machine, 72-first water tank, 73-steel wire rope, 74-pipeline, 100-hot blast furnace, 101-body, 102-burner, 103-chimney, 104-pyrolysis gas pipe, 105-pyrolysis gas storage tank, 106-oil-gas separation tower, 107-small pipe, 108-pipe bundle, 109-flue gas storage tower, 110-heat exchanger, 111-roller, 112-roller shaft, 113-roller, 114-sprocket conveying line, 115-bearing assembly, 116-water jacket, 117-liquid inlet pipe, 118-liquid outlet pipe, 119-insulating layer, 120-air inlet branch pipe, 121-air outlet branch pipe, 122-flue pipe, 123-cooling tower, 124-clapboard, 125-angle steel, 621-water inlet pipe, 622-water inlet pipe joint, 623-hose, 671-hydraulic rod, 672-cooling rod, 673-rod body, 674-circulation loop, 675-coolant inlet, 676-coolant outlet, 691-water jacket inlet and 692-water jacket outlet.
Detailed Description
As shown in fig. 1 to 8, a dry distillation type tunnel type intermittent pyrolysis furnace comprises a hot blast stove 100 and a tunnel type furnace body 4, wherein the furnace body 4 is sequentially divided into a drying area 1, a pyrolysis area 2 and a cooling area 3, and a movable net-shaped furnace frame 5 for filling materials to be heated is arranged in the furnace body 4.
The oven body of the drying area 1 is provided with a hot air inlet 11 and a moisture outlet 12, and the inlet of the drying area 1 is provided with a drying area door 13. The drying zone door 13 is externally provided with a driving mechanism which drives the reticular oven frame 5 to move, and the driving mechanism is preferably a piston cylinder 14.
And a cooling gas inlet 31 and a cooling gas outlet 32 are arranged on two sides of the furnace body of the cooling area 3, and a cooling area door 33 is arranged at the outlet of the cooling area 3.
The juncture of the drying area 1 and the pyrolysis area 2 and the juncture of the pyrolysis area 2 and the cooling area 3 are provided with sealing doors 6 which can completely isolate the pyrolysis area 2 into a closed cavity.
The hot blast stove 100 comprises a body 101, a burner 102 connected with one end of the body 101, a chimney 103 connected with the other end of the body 101, and a pyrolysis gas pipe 104 arranged in the body 101. The burner 102 is a combustion engine or a furnace. The hot blast stove body 101 comprises a hollow shell, heat insulation cotton is lined in the shell, and refractory bricks are laid on the inner wall of the heat insulation cotton.
Pyrolysis gas for pyrolyzing the material to be heated is introduced into the pyrolysis gas pipe 104, and an outlet of the pyrolysis gas pipe 104 is communicated with the side wall of the pyrolysis zone 2 at the end of the cooling zone 3. Spoilers 21 are respectively arranged on the inner walls of two sides of the furnace body of the pyrolysis zone 2 at intervals, and the spoilers 21 on two opposite sides are arranged in a crossed manner, so that high-temperature pyrolysis gas can collide with the spoilers 21 to block to form a broken-line path for flowing.
The pyrolysis gas pipe 104 in the hot blast stove 100 is a pipe bundle 108 consisting of a plurality of parallel small pipes 107, a plurality of pipe bundles 108 are arranged in the hot blast stove body 101 at intervals along the axis, and the adjacent pipe bundles 108 are sequentially communicated end to end.
A side wall of the pyrolysis zone 2 at the end of the drying zone 1 is provided with an exhaust port 23.
An inlet of the pyrolysis gas pipe 104 is connected with a pyrolysis gas storage tank 105 through a pipeline, and pyrolysis gas enters the hot blast stove 100 under the action of the induced draft fan 16. An air outlet 23 of the pyrolysis zone 2 is connected with an oil-gas separation tower 106, and a pyrolysis gas storage tank 105 is connected with the oil-gas separation tower 106.
The chimney 103 is communicated with the outside, and a flue gas storage tower 109 is connected to the chimney 103 in a branching manner. The flue gas storage tower 109 is connected to the cooling gas inlet 31.
The cooling gas outlet 32 is connected to a heat exchanger 110 through a pipe. The heat exchanger 110 is connected to the flue gas storage tower 109 by piping. The cooled flue gas enters the flue gas storage tower 109 through the induced draft fan 16.
Conveying lines for conveying the net-shaped furnace frames 5 are arranged at the bottoms in the furnace bodies 4 of the pyrolysis zone 2 and the drying zone 1. The conveyor line consists of a plurality of rollers 111 arranged in parallel at intervals. The roller 111 includes a roller shaft 112 and a roller 113 fixedly sleeved on the roller shaft 112. The bottom of the reticular oven frame 5 is provided with a sliding part which can slide along the roller 113. The sliding part can adopt an angle iron 125, the width of the angle iron 125 is slightly larger than that of the roller 113, and the angle iron is placed on the roller 113 during sliding.
The cooling zone 3 employs a sprocket feed line 114. And the conveying lines at the junction of the drying area 1 and the pyrolysis area 2 and at the junction of the pyrolysis area 2 and the cooling area 3 are disconnected, and the disconnected width is greater than the thickness of the sealing door.
In the pyrolysis zone 2, both ends of the roll shaft 112 are fixed to the wall of the furnace body 4 by means of bearing assemblies 115. The bearing assembly 115 is surrounded on its outer surface by a water jacket 116. The water jacket 116 is provided with a liquid inlet pipe 117 and a liquid outlet pipe 118, and circulating cooling liquid is filled in the water jacket 116.
The side surface of the roller 113 is wrapped with an insulating layer 119. The roll shaft 112 is a hollow shaft, and the outer surface of the roll shaft 112 is wrapped with a heat insulation layer 119. An air inlet branch pipe 120 aligned with the hollow cavity of the roller shaft 112 is arranged at the position corresponding to one end of the roller shaft 112 on the wall of the furnace body 4 of the pyrolysis zone 2, and an air outlet branch pipe 121 aligned with the hollow cavity of the roller shaft 112 is arranged at the position corresponding to the other end of the roller shaft 112.
The exhaust port 23 of the pyrolysis zone 2 is branched and connected with a smoke pipe 122, and the smoke pipe 122 is connected with a cooling tower 123. The cooling tower 123 is connected to the intake manifold 120 through a pipe. The gas outlet branch pipe 121 is connected with an induced draft fan 16 through a pipeline, and the induced draft fan 16 is connected with the oil-gas separation tower 106. The junction area of the roll shaft 112 and the furnace wall of the pyrolysis zone 2 is filled and sealed by adopting a heat insulation material.
In the pyrolysis zone 2, a partition 124 is arranged between two adjacent rollers 113, and the height of the partition 124 is greater than or equal to the height of the centers of the rollers 113.
The sealing door 6 comprises a bearing box body 61 which is fixedly connected with the furnace body 4 and communicated with the inner cavity of the furnace body 4.
An oven door 62 is installed in the inner cavity of the box body 61, a sealing frame 63 is fixed on one side of the oven door 62 close to the pyrolysis zone 2, the sealing frame 63 is a box-shaped structure formed by enclosing plates, and one side close to the pyrolysis zone 2 is completely open. A sealing groove 64 is arranged on the inner wall of the box body 61 close to one side of the pyrolysis zone 2 and corresponds to the sealing frame 63. A refractory fiber mat 65 is disposed within the seal groove 64. The sealing frame 63 may be inserted into the sealing groove 64 to form a sealing structure.
A spring 66 is provided between the inner wall of the box 61 near the side of the pyrolysis zone 2 and the door 62. The side of the furnace door 62 remote from the pyrolysis zone 2 is provided with a ram 67 that can reciprocate. The ram 67 extends to the outside of the case 61. The contact part between the top rod 67 and the box body 61 is filled with asbestos cord 68.
A cooling water jacket 69 is arranged on one side of the box body 61 close to the pyrolysis zone 2, and a water jacket inlet 691 and a water jacket outlet 692 are arranged on the water jacket 69.
The oven door 62 is of a hollow cavity structure. The top of the oven door 62 is provided with a water inlet pipe 621 and a water outlet pipe, the water inlet pipe 621 is inserted into the lower part of the hollow cavity of the oven door 62, and the top of the box body 61 is provided with a water inlet pipe connector 622 and a water outlet pipe connector. The water inlet pipe 621 is communicated with the water inlet pipe connector 622, and the water outlet pipe is communicated with the water outlet pipe connector through a hose 623.
A high-temperature resistant fiber layer 70 is arranged in the cavity of the sealing frame 63 and clings to the position of the oven door 62.
And an oven door lifting mechanism for lifting the oven door 62 up and down. The furnace door lifting mechanism comprises a first winch 71 and a first water tank 72 fixed on one side of the box body 61. The first winch 71 is connected to the top of the oven door 62 by a wire 73 passing through the wall of the box. A pipeline 74 is sleeved at the perforated part of the steel wire rope 73 and the wall of the tank body, one end of the pipeline 74 is fixed with the wall of the tank body and is communicated with the inner cavity of the tank body 61, the other end of the pipeline 74 is immersed in the first water tank 72, and the steel wire rope 73 penetrates through the pipeline 74.
The ram 67 includes a hydraulic rod 671 and a cooling rod 672 fixed to a front end of the hydraulic rod 671. The cooling rod 672 comprises a rod body 673, a circulation loop 674 arranged in the rod body 673, a cooling liquid inlet 675 and a cooling liquid outlet 676, wherein the cooling liquid inlet 675 and the cooling liquid outlet 676 are arranged on the rod body 673 and are communicated with the circulation loop 674.
In a specific form of the structure of the pyrolysis furnace, the total length of the pyrolysis furnace is 32 meters, a net-shaped furnace frame 5 is filled with biomass, and sixteen net-shaped furnace frames 5 are designed, wherein twelve pyrolysis areas, two cooling areas and two drying areas are formed, and the total number of the pyrolysis areas is 2.
The working process of the pyrolysis furnace is as follows:
(a) the drying zone door 13, the cooling zone door 33, and the two sealing doors 6 are opened. Twelve movable net-shaped furnace frames 5 which are close to each other in sequence and filled with biomass are pushed into the furnace body 4 from the drying area door 13, and after the net-shaped furnace frames 5 are arranged in the pyrolysis area 2 in sequence, two sealing doors 6 of the pyrolysis area 2 are closed.
The operation steps for closing the sealing door 6 are as follows:
the first winch 71 is turned on to slowly lower the door 62, the door 62 is pushed toward the pyrolysis zone 2 by the push rod 67, the spring 66 is compressed, and the sealing frame 63 is inserted into the sealing groove 64.
(b) Two movable net-shaped furnace frames filled with biomass are pushed again to fully discharge the drying area 1, then the drying area door 13 is closed, hot air is introduced into the drying area 1 from the hot air inlet 11 to dry the biomass, and moisture is discharged from the moisture discharge port 12.
(c) The cooling zone door 33 is closed.
(d) Aiming at different biomasses, the temperature in the hot blast stove 100 is adjusted according to specific conditions, so that the set temperature (400-1200 ℃ can be maintained according to specific conditions) is maintained, and the pyrolysis gas heated in the hot blast stove 100 is introduced into the pyrolysis zone 2. The pyrolysis gas is guided by the spoiler 21 to advance in a broken line manner until being discharged from the exhaust port 23, and then the pyrolysis gas is sequentially and fully contacted with the biomass, so that the biomass is fully pyrolyzed and reacted in the pyrolysis zone, and the high-temperature pyrolysis gas is stopped being conveyed after the specified time.
(e) Two sealing doors 6 of the pyrolysis zone 2 are opened, a piston cylinder 14 is started, two dried reticular oven frames 5 in the drying zone 1 are pushed into the pyrolysis zone 2, and meanwhile, the two pyrolyzed reticular oven frames 5 are ejected out of the pyrolysis zone 2 along the same trend, so that the two pyrolyzed reticular oven frames enter the cooling zone 3.
The process of opening the sealing door 6 is the reverse process of closing the sealing door 6 in the step (a).
(f) The chain wheel conveyor line 114 is started to move the mesh furnace frame 5 in the cooling area 3 to the outlet direction of the cooling area for a certain distance (the distance is based on the sealing door 6 can be freely put down), and the two sealing doors 6 are closed.
(g) Two net-like furnace frames 5 filled with biomass are pushed again to fill the drying zone 1, after which the drying zone door 13 is closed. At the same time, cooled flue gas is introduced from the cooling gas inlet 31 and the cooled flue gas is discharged from the cooling gas outlet 32. In the process, high-temperature pyrolysis gas is continuously introduced from the hot blast stove 100 to the pyrolysis zone 2 to carry out pyrolysis reaction.
(h) After the cooling is completed, the cooling area door 33 is opened, and the chain wheel conveyor line 114 is started to transport the two mesh-shaped furnace frames 5 in the cooling area 3 to the outside. And (5) repeating the steps (e) to (h) after the reaction in the pyrolysis zone 2 is finished, and continuously and circularly performing the procedures of drying, pyrolysis and cooling.
Claims (11)
1. A dry distillation type tunnel type intermittent pyrolysis furnace is characterized in that: the device comprises a hot blast stove (100) and a tunnel type stove body (4), wherein the stove body (4) is sequentially divided into a drying area (1), a pyrolysis area (2) and a cooling area (3), and a movable net-shaped stove frame (5) used for filling a substance to be heated is arranged in the stove body (4);
a hot air inlet (11) and a moisture outlet (12) are arranged on a furnace body of the drying area (1), a drying area door (13) is arranged at the inlet of the drying area (1), and a driving mechanism for driving the reticular furnace frame (5) to move is arranged outside the drying area door (13);
a cooling gas inlet (31) and a cooling gas outlet (32) are arranged on two sides of the furnace body of the cooling area (3), and a cooling area door (33) is arranged at the outlet of the cooling area (3);
sealing doors (6) capable of completely isolating the pyrolysis zone (2) into a closed cavity are arranged at the junction of the drying zone (1) and the pyrolysis zone (2) and at the junction of the pyrolysis zone (2) and the cooling zone (3);
the hot blast stove (100) comprises a body (101), a burner (102) connected with one end of the body (101), a chimney (103) connected with the other end of the body (101), and a pyrolysis gas pipe (104) arranged in the body (101), wherein pyrolysis gas for pyrolyzing substances to be heated is introduced into the pyrolysis gas pipe (104), and an outlet of the pyrolysis gas pipe (104) is communicated with the side wall of the pyrolysis zone (2) at the end of the cooling zone (3);
an exhaust port (23) is arranged on the side wall of the pyrolysis zone (2) at the end of the drying zone (1);
conveying lines for conveying the reticular furnace frames (5) are arranged at the inner bottoms of the furnace bodies (4) of the pyrolysis zone (2) and the drying zone (1), each conveying line is composed of a plurality of rollers (111) which are arranged in parallel at intervals, and each roller (111) comprises a roller shaft (112) and a roller (113) fixedly sleeved on the roller shaft (112);
in the pyrolysis zone (2), two ends of the roll shaft (112) are fixed on the wall of the furnace body (4) through bearing assemblies (115), the outer surface of each bearing assembly (115) is wrapped with a water jacket (116), each water jacket (116) is provided with a liquid inlet pipe (117) and a liquid outlet pipe (118), and circulating cooling liquid is introduced into each water jacket (116);
the side surface of the roller (113) is wrapped with a heat insulation layer (119), the roller shaft (112) is a hollow shaft, and the outer surface of the roller shaft (112) is wrapped with the heat insulation layer (119).
2. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 1, wherein: the inlet of the pyrolysis gas pipe (104) is connected with a pyrolysis gas storage tank (105) through a pipeline, the exhaust port (23) of the pyrolysis area (2) is connected with an oil-gas separation tower (106), and the pyrolysis gas storage tank (105) is connected with the oil-gas separation tower (106).
3. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 1, wherein: the pyrolysis gas pipe (104) in the hot blast stove (100) is a pipe bundle (108) consisting of a plurality of parallel small pipes (107), a plurality of pipe bundles (108) are arranged in the hot blast stove body (101) at intervals along the axis, and adjacent pipe bundles (108) are sequentially communicated end to end.
4. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 1, wherein: the chimney (103) is communicated with the outside, a flue gas storage tower (109) is connected to the chimney (103) in a branching manner, and the flue gas storage tower (109) is connected with the cooling gas inlet (31);
the cooling gas outlet (32) is connected with a heat exchanger (110) through a pipeline, and the heat exchanger (110) is connected with a flue gas storage tower (109) through a pipeline.
5. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 1, wherein: spoilers (21) are respectively arranged on the inner walls of two sides of the furnace body of the pyrolysis zone (2) at intervals, and the spoilers (21) on two opposite sides are arranged in a cross mode, so that high-temperature pyrolysis gas can collide with the spoilers (21) to block to form a broken line path to flow.
6. The dry distillation type tunnel type intermittent pyrolysis furnace according to any one of claims 1 to 5, characterized in that: the bottom of the reticular oven frame (5) is provided with a sliding part which can slide along the roller (113);
the cooling area (3) adopts a chain wheel conveying line (114); and the conveying line at the junction of the drying zone (1) and the pyrolysis zone (2) and at the junction of the pyrolysis zone (2) and the cooling zone (3) is disconnected, and the disconnected width is greater than the thickness of the sealing door.
7. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 6, wherein:
an air inlet branch pipe (120) aligned with the hollow cavity of the roll shaft (112) is arranged at one end of the wall of the furnace body (4) of the pyrolysis zone (2) corresponding to the roll shaft (112), and an air outlet branch pipe (121) aligned with the hollow cavity of the roll shaft (112) is arranged at the other end of the wall corresponding to the roll shaft (112);
a smoke pipe (122) is connected to an exhaust port (23) of the pyrolysis zone (2) in a branching manner, the smoke pipe (122) is connected with a cooling tower (123), the cooling tower (123) is connected with a gas inlet branch pipe (120) through a pipeline, a gas outlet branch pipe (121) is connected with a draught fan (16) through a pipeline, and the draught fan (16) is connected with an oil-gas separation tower (106);
and the junction area of the roll shaft (112) and the furnace wall of the pyrolysis zone (2) is filled and sealed by adopting a heat insulation material.
8. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 7, wherein: in the pyrolysis zone (2), a partition plate (124) is arranged between two adjacent rollers (113), and the height of the partition plate (124) is greater than or equal to the height of the center of the roller (113).
9. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 1, wherein: the sealing door (6) comprises a bearing box body (61) which is fixedly connected with the furnace body (4) and is communicated with the inner cavity of the furnace body (4);
a furnace door (62) is installed in the inner cavity of the box body (61), a sealing frame (63) is fixed on one side, close to the pyrolysis zone (2), of the furnace door (62), the sealing frame (63) is of a box-shaped structure formed by surrounding plates, and one side, close to the pyrolysis zone (2), of the sealing frame is completely open; a sealing groove (64) is formed in the inner wall of the box body (61) close to one side of the pyrolysis zone (2) and corresponds to the sealing frame (63), a high-temperature-resistant fiber mat (65) is arranged in the sealing groove (64), and the sealing frame (63) can be inserted into the sealing groove (64) to form a sealing structure;
a spring (66) is arranged between the inner wall of the box body (61) close to one side of the pyrolysis zone (2) and the furnace door (62), a push rod (67) capable of moving back and forth is arranged on one side of the furnace door (62) far away from the pyrolysis zone (2), and the push rod (67) extends to the outside of the box body (61); the contact part between the mandril (67) and the box body (61) is filled with an asbestos rope (68);
also comprises an oven door lifting mechanism for lifting the oven door (62) up and down.
10. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 9, wherein: a cooling water jacket (69) is arranged on one side of the box body (61) close to the pyrolysis zone (2), and a water jacket water inlet (691) and a water jacket water outlet (692) are formed in the water jacket (69);
the oven door (62) is of a hollow cavity structure, a water inlet pipe (621) and a water outlet pipe are arranged at the top of the oven door (62), the water inlet pipe (621) is inserted into the lower part of the hollow cavity of the oven door (62), a water inlet pipe connector (622) and a water outlet pipe connector are arranged at the top of the box body (61), and the water inlet pipe (621), the water inlet pipe connector (622), the water outlet pipe and the water outlet pipe connector are respectively communicated through hoses (623);
a high-temperature resistant fiber layer (70) is arranged in the cavity of the sealing frame (63) and is tightly attached to the position of the furnace door (62);
the furnace door lifting mechanism comprises a first winch (71) and a first water tank (72) fixed on one side of the box body (61), the first winch (71) is connected with the top of the furnace door (62) through a steel wire rope (73) penetrating through the wall of the box body, a pipeline (74) is sleeved at the position where the steel wire rope (73) penetrates through the wall of the box body, one end of the pipeline (74) is fixed with the wall of the box body and communicated with the inner cavity of the box body (61), the other end of the pipeline is immersed in the first water tank (72), and the steel wire rope (73) penetrates through the pipeline (74).
11. The retort-type tunnel-type intermittent pyrolysis furnace as recited in claim 9, wherein: the ejector rod (67) comprises a hydraulic rod (671) and a cooling rod (672) fixed at the front end of the hydraulic rod (671), and the cooling rod (672) comprises a rod body (673), a circulation loop (674) arranged in the rod body (673), a cooling liquid inlet (675) and a cooling liquid outlet (676) which are arranged on the rod body (673) and communicated with the circulation loop (674).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176390.1A CN106916598B (en) | 2017-03-23 | 2017-03-23 | Dry distillation type tunnel type intermittent pyrolysis furnace |
| PCT/CN2018/079518 WO2018171566A1 (en) | 2017-03-23 | 2018-03-20 | Dry distillation type discontinuous tunnel pyrolysis furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710176390.1A CN106916598B (en) | 2017-03-23 | 2017-03-23 | Dry distillation type tunnel type intermittent pyrolysis furnace |
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| CN106916598A CN106916598A (en) | 2017-07-04 |
| CN106916598B true CN106916598B (en) | 2020-06-26 |
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| CN201710176390.1A Expired - Fee Related CN106916598B (en) | 2017-03-23 | 2017-03-23 | Dry distillation type tunnel type intermittent pyrolysis furnace |
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| WO (1) | WO2018171566A1 (en) |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409152A (en) * | 2013-07-26 | 2013-11-27 | 中国五环工程有限公司 | Technology and system for upgrading low-rank coal through high-heating-value gas heat carrier |
| WO2014176793A1 (en) * | 2013-04-28 | 2014-11-06 | Cai Jingpeng | Drying or low-temperature dry distillation method and device for lignite coal or low-metamorphic candle coal |
| CN105694930A (en) * | 2016-03-09 | 2016-06-22 | 肖国雄 | Tunnel type intermittent biomass pyrolysis furnace |
| CN106398731A (en) * | 2016-11-25 | 2017-02-15 | 肖国雄 | High-efficiency tunnel-type intermittent pyrolysis furnace |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3951587B2 (en) * | 2000-10-19 | 2007-08-01 | 株式会社明電舎 | Pyrolysis treatment facility and operation method |
| JP4169151B2 (en) * | 2003-03-12 | 2008-10-22 | 日本下水道事業団 | Carbonization equipment for sludge containing organic matter |
| CN102925179B (en) * | 2012-11-26 | 2014-04-02 | 北京碧瑞能科技发展有限公司 | Lignite complete cycle high-efficiency dry distillation quality improving system and method |
| CN104877690B (en) * | 2015-06-09 | 2018-05-25 | 浙江宜可欧环保科技有限公司 | A kind of organic waste matter pyrolysis charring processing method and processing device |
| CN206204223U (en) * | 2016-11-25 | 2017-05-31 | 肖国雄 | A kind of interrupted pyrolysis oven of efficient tunnel type |
| CN106916598B (en) * | 2017-03-23 | 2020-06-26 | 肖国雄 | Dry distillation type tunnel type intermittent pyrolysis furnace |
-
2017
- 2017-03-23 CN CN201710176390.1A patent/CN106916598B/en not_active Expired - Fee Related
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2018
- 2018-03-20 WO PCT/CN2018/079518 patent/WO2018171566A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014176793A1 (en) * | 2013-04-28 | 2014-11-06 | Cai Jingpeng | Drying or low-temperature dry distillation method and device for lignite coal or low-metamorphic candle coal |
| CN103409152A (en) * | 2013-07-26 | 2013-11-27 | 中国五环工程有限公司 | Technology and system for upgrading low-rank coal through high-heating-value gas heat carrier |
| CN105694930A (en) * | 2016-03-09 | 2016-06-22 | 肖国雄 | Tunnel type intermittent biomass pyrolysis furnace |
| CN106398731A (en) * | 2016-11-25 | 2017-02-15 | 肖国雄 | High-efficiency tunnel-type intermittent pyrolysis furnace |
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