A kind of organic substance microwave thermal cracker
Technical field
The present invention is a kind of organic substance thermal cracker, particularly relates to a kind of organic substance microwave thermal cracker that is adapted to the thermo-cracking of organic substance waste, low-disintegration coal.
Background technology
The energy is that modern society depends on for existence and the basis of the national economic development.Fossil energy as energy pillar is brought serious pollution to the mankind's living environment, and the fossil energies such as oil, coal, Sweet natural gas are non-renewable, and resource is limited, is being faced with the danger of petering out.Biomass are to derive from photosynthesis of plant directly or indirectly and the various organisms that produce, comprise animals and plants and microorganism.To be green plants convert solar energy into chemical energy by chlorophyll to biomass energy contains a kind of form of energy in biomass inside, is a kind of energy take biomass as carrier, is reproducible green energy resource.In various renewable energy sources, biomass energy is unique renewable, carbon resource that alternative fossil energy changes into liquid state and gaseous fuel and other industrial chemicals or product.
The renewable energy resources: the organic substance thermo-cracking can produce bio oil, inflammable gas and activated carbon.Carry out thermo-cracking for organic substance waste and can realize the bioenergy recycling.
Low-disintegration coal liquefaction and gasification: low-disintegration coal has the characteristics that low grey, low-phosphorous, golf calorific value, height are waved minute and high chemistry is lived, general low-temperature pyrolysis production Jiao, tar and the coal gas of adopting now.
The product that obtains after biomass through pyrolysis is activated carbon, bio oil and inflammable gas.What use value was high is bio oil and inflammable gas, therefore should increase to greatest extent the output of bio oil and inflammable gas in the biomass through pyrolysis process.Production purpose difference due to has separately developed two kinds of technology: biomass liquefying technology and biomass vaporization technology.
Biomass liquefying technical requirements material in reactor heat-up rate 200 ℃/more than s, be limited to that traditional heating material mode is conducted, convection current and radiation, being rapidly heated is technical barrier.The coal-tar middle oil content of biomass vaporization technology combustion gas is higher, and follow-up gas-purification technique needs a large amount of water, brings serious contaminated wastewater; Gasification efficiency is on the low side, and productive rate is on the low side, and in combustion gas, combustable gas concentration is low.
Low-disintegration coal adopts traditional internal heat type low-temperature dry distillation technique, and its raw material is the lump coal of 20mm~80mm, only has 30%~40% meet the demands in actual coal production, and approximately the granularity of 70% left and right is less than 20mm, can not be effectively used.
Microwave heating has the characteristics such as instantaneity, globality, selectivity, high efficiency, can rapidly heating material be heated up, and makes the cracking of organic substance flash, produces oil, gas and activated carbon, and thermo-cracking quality product and yield all increase than traditional way.And in the thermo-cracking of low-disintegration coal to coal cinder without strict particle requirement, improved the practical efficiency of colliery institute producing coal.
Summary of the invention
It is fast that technical problem to be solved by this invention is to provide a kind of thermo-cracking and speed of response that is adapted to organic substance waste, low-disintegration coal, the organic substance microwave thermal cracker that the gas-liquid rate of recovery is high, calorific value is high, energy consumption is low.
in order to solve the problems of the technologies described above, organic substance microwave thermal cracker provided by the invention, be provided with on framework platform and dock successively feed mechanism, hopper, spiral charging tight mechanism, helical feed successive drying body of heater, microwave high-temperature cracking body of heater, discharging slow cooling body of heater, the water-cooled material collecting barrel, spiral discharging tight mechanism and solid materials material collecting barrel, be provided with the Pintsch process stirring mechanism in described microwave high-temperature cracking body of heater, be provided with the discharging stirring mechanism in described water-cooled material collecting barrel, be arranged on the microwave energy-feeding system on described helical feed successive drying body of heater and microwave high-temperature cracking body of heater, atmosphere protection system and described spiral charging tight mechanism, helical feed successive drying body of heater is connected with the spiral discharging tight mechanism, described helical feed successive drying body of heater is connected with gas gathering system, described microwave high-temperature cracking body of heater is provided with temp measuring system, also be provided with water cooling system and Controlling System on described framework platform.
Two spiral conveying mechanism convey materials that described spiral charging tight mechanism adopts horizontal and vertical to be orthogonal.
The screw rod of the horizontal screw conveyer structure of described spiral charging tight mechanism adopts varying pitch screw.
Described helical feed successive drying body of heater adopts the two-screw conveyer structure, and is horizontally disposed.
The microwave excitation cavity of described helical feed successive drying body of heater adopts outer insulation, furnace chamber is divided into two cavitys in up and down, upper cavity is installed microwave energy-feeding antenna, lower chamber transmission dried material, described up and down furnace cavity adopts specific inductivity 8~12 boron plates to separate, and has the venting hole that is connected with described gas gathering system in the both sides of lower chamber.
Described microwave high-temperature cracking body of heater is taked to be arranged vertically, and microwave excitation cavity adopts rectangular parallelepiped, is ceramic boiler tube inside built-in heat insulation layer, thermal insulation layer.
Described discharging slow cooling body of heater is square band water-cooling jacket stainless steel cavity, and in-built thermal insulation layer is graphite boiler tube in thermal insulation layer, density 〉=1.7g/cm
3
The thermal insulation layer of described discharging slow cooling body of heater and described microwave high-temperature cracking insulating layer of furnace body joint isolate with graphite cake, and graphite cake is arranged on below foamed ceramic panel.
Described spiral discharging tight mechanism adopts the varying pitch design, and power intake adopts graphite to make sliding surface bearing and supports, and shield microwaves leaks; Shell band water-cooling jacket carries out cooling in material conveying process.
Described microwave energy-feeding system adopts the microwave feedback energy of notch antenna at described helical feed successive drying body of heater, and when leaky antenna is unloaded, its standing-wave ratio is less than 1.05; Adopt circulator, water load and microwave source to be used in combination at described microwave high-temperature cracking body of heater, the load of coupling microwave source.
adopt the organic substance microwave thermal cracker of technique scheme, by feed mechanism, spiral charging tight mechanism, helical feed successive drying body of heater, microwave high-temperature cracking body of heater, the Pintsch process stirring mechanism, discharging slow cooling body of heater, the water-cooled material collecting barrel, the discharging stirring mechanism, the spiral discharging tight mechanism, the microwave energy-feeding system, water cooling system, the atmosphere protection system, temp measuring system, gas gathering system, Controlling System, solid materials material collecting barrel and framework platform form, two spiral conveying mechanism convey materials that spiral charging tight mechanism adopts horizontal and vertical to be orthogonal, the screw rod of horizontal screw conveyer structure adopts varying pitch screw, make material push ahead and tentatively become closely knit along with screw rod, the air of bringing into along with material is extruded discharge at the charging leading portion, realize air seal.The all body of heater ends that stretches out in the two ends of spiral conveying mechanism adopt graphite sliding bearing, shield microwaves.Helical feed successive drying body of heater adopts the two-screw conveyer structure, and is horizontally disposed, increases material in the specific surface area of microwave excitation cavity, and the microwave exposure area is large.Microwave excitation cavity adopts outer insulation, and furnace chamber is divided into two cavitys in up and down, and upper cavity is installed microwave energy-feeding antenna, lower chamber transmission dried material.The up and down furnace cavity adopts specific inductivity 8~12 boron plates to separate.Both sides at lower chamber have venting hole, dry steam of discharging and cracked gas are discharged from the both sides of lower chamber, and do not enter upper cavity, the protection energy-feeding antenna.The power intake axle of spiral conveying mechanism supports and has adopted graphite sliding bearing, and shield microwaves leaks.In dry body of heater and cracking body of heater junction, the spiral conveying mechanism axle supports and adopts graphite sliding bearing, high temperature resistant and high carbon-containing atmosphere, working stability.
Microwave high-temperature cracking body of heater is taked to be arranged vertically, and microwave excitation cavity adopts rectangular parallelepiped, is ceramic boiler tube inside built-in heat insulation layer, thermal insulation layer.Excitation cavity is determined the high size of excitation cavity inner chamber length and width and microwave source feed-in mouth position according to cavity internal burden characteristic, make excitation cavity when zero load standing-wave ratio less than 1.1.The thermal insulation layer material adopts ceramic beaverboard.Ceramic beaverboard has low-k and low magnetic loss, and microwave penetration is good, and self wave-sucking performance is poor, and heating is few.One deck Alumina Foam Ceramics plate is adopted in thermal insulation layer and contact position, excitation cavity top and the bottom, and ceramic beaverboard and boiler tube are kept apart at unlimited place up and down, prevents that lysate from polluting ceramic beaverboard, affects effect of heat insulation.The Alumina Foam Ceramics plate is produced through foaming, sintering process by the alumina in Nano level ceramic powder.Have high physical strength, low-k, low heat conduction coefficient and high-temperature stability.The pottery boiler tube is cylindrical drum, and organic substance is cracking in cylindrical drum.After cracking, gas is from boiler tube top discharge, and solid product is deposited to the bottom, is sent by spiral conveying mechanism.Pottery boiler tube Al
2O
3Content 〉=99%, volume density 〉=3.6g/cm
3, apparent porosity≤1%, specific inductivity≤3, bending strength: 〉=350MPa, ultimate compression strength: 〉=12000MPa.
The Pintsch process stirring mechanism stirs the organic substance material of Pintsch process in boiler tube, prevents that solid accumulation from building bridge, and the gas that produces after descending smooth and cracking is discharged and is obstructed.The stirring rake material of stirring mechanism is stupalith.Wear resisting property is good, Mohs' hardness>9.2, and good heat conductivity, thermal conductivity>20Kcal/m.h. ℃, physical strength is high, density>3.1g/cm
3, linear expansivity is little, and<4.8 * 10
-6M/ ℃.Stirring rake drive unit transmission shaft stretches out microwave excitation cavity and adopts graphite to make sliding surface bearing, shield microwaves.
Discharging slow cooling body of heater is square band water-cooling jacket stainless steel cavity, and in-built thermal insulation layer is graphite boiler tube in thermal insulation layer, density 〉=1.7g/cm
3The thermal insulation layer of discharging slow cooling body of heater and microwave high-temperature cracking insulating layer of furnace body joint isolate with graphite cake, and graphite cake is arranged on below foamed ceramic panel.Foamed ceramic panel reduces the cracking body of heater of high temperature and the leer body heat conduction of low temperature, and graphite cake separates two furnace chambers in up and down, and the above is a microwave excitation cavity, and the below is a slow cooling heat exchange furnace chamber.Graphite boiler tube makes the interior microwave radiation of microwave high-temperature cracking body of heater in graphite boiler tube, and shield microwaves enters in the thermal insulation layer of discharging slow cooling body of heater.
The water-cooled material collecting barrel is the stainless steel cone with water-cooling jacket, and after the cone angle of cone and organic substance cracking, the angle of repose of solid product particle is relevant.After the organic substance cracking, the solid product particle directly contacts with the cooling jacket face, accelerates thermal conduction and makes material cooling rapidly.
The discharging stirring mechanism constantly stirs solid product after the organic substance cracking, prevents that on the one hand material from building bridge, and circulates not smooth, macrobead is rubbed, be convenient to the discharging mechanism discharging, can also accelerate the heat exchange of material and watercooling jacket, reduce rapidly temperature.
Stirring mechanism stirring rake material is heat-resistance stainless steel, and the extreme higher position is at 1/3 place of slow cooling section, and power intake is positioned at outside the water-cooled material collecting barrel, adopts graphite to make sliding surface bearing and supports, and shield microwaves prevents microwave leakage.
The spiral discharging tight mechanism adopts the varying pitch design, makes material in the discharge port compacting, prevents that extraneous gas from entering; Power intake adopts graphite to make sliding surface bearing and supports, and shield microwaves leaks; Shell band water-cooling jacket carries out cooling in material conveying process.
The microwave energy-feeding system adopts the microwave feedback energy of notch antenna at helical feed successive drying body of heater, and when leaky antenna is unloaded, its standing-wave ratio is less than 1.1; Adopt circulator, water load and microwave source to be used in combination at microwave high-temperature cracking body of heater, the load of coupling microwave source.
The atmosphere protection system makes in order to prevent that the furnace chamber extraneous air from entering furnace chamber, causes gas oxygen too high levels in furnace chamber, the danger of blasting.The shielding gas that the atmosphere protection system passes into is CO
2, the CO in microwave field
2Under high-temperature condition, easy and C reacts, and generates CO, increases inflammable gas output in the organic substance thermo-cracking.The atmosphere protection system is filled with CO at the horizontal screw conveyer structure of spiral charging tight mechanism
2, prevent that opening for feed from entering air; Upper cavity at helical feed successive drying body of heater is filled with CO
2, prevent that cracked gas from entering leaky antenna; Be filled with CO at the spiral discharging tight mechanism near the discharge end structure
2, prevent that discharge port from entering air.
Gas gathering system is condensable gases and the condensable gases not of collecting after the organic substance cracking.Lower chamber both sides at helical feed successive drying body of heater respectively arrange some venting ports, the gas that microwave high-temperature cracking body of heater produces is collected from helical feed successive drying body of heater venting port, reduced on the one hand the temperature of collecting gas, on the other hand preheating treat the organic substance material of Pintsch process.
Microwave heating has the characteristics such as instantaneity, globality, selectivity, high efficiency and security.With respect to traditional heating mode, but the microwave heating Reaction time shorten is simplified technique, and comprehensive energy consumption is only 30~40% of traditional electric heating process.Utilize microwave heating technique to replace traditional heating technique, to the organic substance thermo-cracking, can realize that production rate is fast, energy consumption is low, the product that calorific value is large.The present invention is that a kind of speed of response is fast, and gas, the organic substance microwave thermal cracker that the liquid rate of recovery is high, calorific value is high, energy consumption is low are adapted to the thermo-cracking of organic substance waste, low-disintegration coal especially.
The present invention adopts microwave heating, the moisture absorption microwave when low temperature in organic substance, and temperature rises rapidly, and the moisture vaporization makes material rapid drying.Due to the hot spot-effect of microwave heating, thermo-cracking can occur in organic substance at a lower temperature when Microwave Field Heating, and the gas, liquid, solid that obtain are than high, and organic substance renewable energy resources production cost is low.
In sum, the present invention is that a kind of speed of response is fast, and gas, the organic substance microwave thermal cracker that the liquid rate of recovery is high, calorific value is high, energy consumption is low are adapted to the thermo-cracking of organic substance waste, low-disintegration coal especially.
Description of drawings
Fig. 1 is a kind of organic substance microwave thermal of the present invention cracker structural front view.
Fig. 2 is the airtight mechanism structure schematic diagram of spiral charging.
Fig. 3 is helical feed successive drying furnace binding schematic diagram.
Fig. 4 is microwave high-temperature pyrolyzer body structure schematic diagram.
Fig. 5 is Pintsch process stirring mechanism structural representation.
Fig. 6 is discharging leer body structure schematic diagram.
Fig. 7 is water-cooled material collecting barrel, discharging stirring mechanism structural representation.
Fig. 8 is spiral discharging tight mechanism structural representation.
Embodiment
The present invention will be further described in detail with regard to embodiment below in conjunction with accompanying drawing.
referring to Fig. 1, be provided with on framework platform 17 and dock successively feed mechanism 1, hopper 18, spiral charging tight mechanism 2, helical feed successive drying body of heater 3, microwave high-temperature cracking body of heater 4, discharging slow cooling body of heater 6, water-cooled material collecting barrel 7, spiral discharging tight mechanism 9 and solid materials material collecting barrel 15, be provided with Pintsch process stirring mechanism 5 in microwave high-temperature cracking body of heater 4, be provided with discharging stirring mechanism 8 in water-cooled material collecting barrel 7, be arranged on microwave energy-feeding system 10 on helical feed successive drying body of heater 3 and microwave high-temperature cracking body of heater 4, atmosphere protection system 12 and spiral charging tight mechanism 2, helical feed successive drying body of heater 3 is connected connection with the spiral discharging tight mechanism, helical feed successive drying body of heater 3 is connected with gas gathering system 14, microwave high-temperature cracking body of heater 4 is provided with temp measuring system 13, also be provided with water cooling system 11 and Controlling System 16 on framework platform 17.
Referring to Fig. 2, spiral charging tight mechanism 2 adopts horizontal screw conveyer structures 21 and the vertical screw type conveyer structure 22 ground transfer mechanism convey materials that is orthogonal.The screw rod of horizontal screw conveyer structure 21 adopts varying pitch screw, makes material push ahead and tentatively become closely knit along with screw rod, and the air of bringing into along with material is extruded discharge at the charging leading portion, realizes air seal.The all body of heater ends that stretches out in the two ends of spiral conveying mechanism all adopt the first graphite sliding bearing 23, shield microwaves.Inlet mouth 24 is set at horizontal screw conveyer structure 21 middle parts is communicated with atmosphere protection system 12, to spiral charging tight mechanism 2 interior carbonatings, cut off the air of outside.
Referring to Fig. 3, helical feed successive drying body of heater 3 adopts two-screw conveyer structure 31, and is horizontally disposed, increases material in the specific surface area of microwave excitation cavity, and the microwave exposure area is large.Microwave excitation cavity adopts outer insulation 32, and microwave excitation cavity is divided into two cavitys in up and down, and upper cavity 33 is installed microwave energy-feeding antenna 34, lower chamber 35 transmission dried materials 36.The up and down furnace cavity adopts specific inductivity 8~12 boron plates 37 to separate.Have venting hole 38 in the both sides of lower chamber 35 and be communicated with gas gathering system 14, dry steam of discharging and cracked gas are discharged from the both sides of lower chamber 35, and do not enter upper cavity 33, the protection energy-feeding antenna.The power intake axle of spiral conveying mechanism supports and has adopted the second graphite sliding bearing 39, and shield microwaves leaks.In dry body of heater and cracking body of heater junction, the spiral conveying mechanism axle supports and adopts the 3rd graphite sliding bearing 310, high temperature resistant and high carbon-containing atmosphere, working stability.
Referring to Fig. 4, microwave high-temperature cracking body of heater 4 is taked to be arranged vertically, and microwave excitation cavity 41 adopts rectangular parallelepiped, is corundum furnace tube 43 inside built-in heat insulation layer 42, thermal insulation layer.Excitation cavity is determined the high size of excitation cavity inner chamber length and width and microwave source feed-in mouth position according to cavity internal burden characteristic, makes excitation cavity standing-wave ratio when zero load be less than 1.1.The thermal insulation layer material adopts ceramic beaverboard.Ceramic beaverboard has low-k and low magnetic loss, and microwave penetration is good, and self wave-sucking performance is poor, and heating is few.One deck Alumina Foam Ceramics plate 44 is adopted in ceramic beaverboard thermal insulation layer and contact position, excitation cavity top and the bottom, and ceramic beaverboard and boiler tube are kept apart at unlimited place up and down, prevents that lysate from polluting the ceramic alumina fiber plate, affects effect of heat insulation.The Alumina Foam Ceramics plate is produced through foaming, sintering process by the alumina in Nano level ceramic powder.Have high physical strength, low-k, low heat conduction coefficient and high-temperature stability.Corundum furnace tube 43 is cylindrical drum, and organic substance is cracking in cylindrical drum.After cracking, gas is from boiler tube top discharge, and solid product is deposited to the bottom, is sent by spiral conveying mechanism.Al in corundum furnace tube 43
2O
3Content 〉=99%, volume density 〉=3.6g/cm
3, apparent porosity≤1%, specific inductivity≤3, bending strength: 〉=350MPa, ultimate compression strength: 〉=12000MPa.
Referring to Fig. 5, the organic substance material of Pintsch process stirs in 5 pairs of boiler tubes of Pintsch process stirring mechanism, prevents that solid accumulation from building bridge, and the gas that produces after descending smooth and cracking is discharged and is obstructed.Stirring rake 51 materials of stirring mechanism are pottery.Wear resisting property is good.Mohs' hardness>9.2, good heat conductivity, thermal conductivity>20Kcal/m.h. ℃, physical strength is high, density>3.1g/cm
3, linear expansivity is little, and<4.8 * 10
-6M/ ℃.Stirring rake drive unit transmission shaft 52 stretches out microwave excitation cavity and adopts the first graphite 53 to make sliding surface bearing, shield microwaves.
Referring to Fig. 6, discharging slow cooling body of heater 6 is square stainless steel cavity 62 with water-cooling jacket 61, and in-built thermal insulation layer 63 is graphite boiler tube 64 in thermal insulation layer, density 〉=1.7g/cm
3
The thermal insulation layer of discharging slow cooling body of heater and 4 thermal insulation layer joint graphite cake 65 isolation of microwave high-temperature cracking body of heater, graphite cake 65 is arranged on below foamed ceramic panel 66.Foamed ceramic panel 66 reduces the cracking body of heater of high temperature and the leer body heat conduction of low temperature, and graphite cake 65 separates two furnace chambers in up and down, and the above is a microwave excitation cavity, and the below is a slow cooling heat exchange furnace chamber.
Graphite boiler tube 64 makes the interior microwave radiation of microwave high-temperature cracking body of heater 4 in graphite boiler tube 64, and shield microwaves enters in the thermal insulation layer of discharging slow cooling body of heater 6.
Referring to Fig. 7, water-cooled material collecting barrel 7 is the stainless steel cone 72 with the first water-cooling jacket 71, and after the cone angle of stainless steel cone 72 and organic substance cracking, the angle of repose of solid product particle is relevant.After the organic substance cracking, the solid product particle directly contacts with the cooling jacket face, accelerates thermal conduction and makes material cooling rapidly.
Referring to Fig. 7, discharging stirring mechanism 8 constantly stirs solid product after the organic substance cracking, prevents that on the one hand material from building bridge, circulate not smooth, macrobead is rubbed, be convenient to the discharging mechanism discharging, can also accelerate the heat exchange of material and watercooling jacket, reduce rapidly temperature.
Stirring mechanism stirring rake 83 materials are heat-resistance stainless steel, and the extreme higher position is at 1/3 place of slow cooling section, and the 3rd power intake 84 is positioned at outside water-cooled material collecting barrel 7, adopt the 3rd graphite 85 to make sliding surface bearing and support, and shield microwaves prevents microwave leakage.
Referring to Fig. 8, the conveying screw rod 91 of spiral discharging tight mechanism 9 adopts the varying pitch design, makes material in the discharge port compacting, prevents that extraneous gas from entering; The 4th power intake 92 adopts the 4th graphite 93 to make sliding surface bearing and supports, and shield microwaves leaks; Shell band the second water-cooling jacket 94 carries out cooling in material conveying process.
Microwave energy-feeding system 10 adopts the microwave feedback energy of notch antenna at helical feed successive drying body of heater 3, and when leaky antenna is unloaded, its standing-wave ratio requires to reach more than 1.070; Adopt circulator, water load and microwave source to be used in combination at microwave high-temperature cracking body of heater 4, the load of coupling microwave source.
Atmosphere protection system 12 makes in order to prevent that the furnace chamber extraneous air from entering furnace chamber, causes gas oxygen too high levels in furnace chamber, the danger of blasting.The shielding gas that atmosphere protection system 12 passes into is CO
2, the CO in microwave field
2Under high-temperature condition, easy and C reacts, and generates CO, increases inflammable gas output in the organic substance thermo-cracking.Atmosphere protection system 12 is filled with CO at the horizontal screw conveyer structure 21 of spiral charging tight mechanism 2
2, prevent that opening for feed from entering air; Upper cavity 33 at helical feed successive drying body of heater 3 is filled with CO
2, prevent that cracked gas from entering leaky antenna; Be filled with CO at spiral discharging tight mechanism 9 near the discharge end structure
2, prevent that discharge port from entering air.
Gas gathering system 14 is condensable gases and condensable gases not of collecting after the organic substance cracking.Lower chamber 35 both sides at helical feed successive drying body of heater 3 respectively arrange some venting holes 38, the gas that microwave high-temperature cracking body of heater 4 produces is collected from the venting hole 38 of helical feed successive drying body of heater 3, reduced on the one hand the temperature of collecting gas, on the other hand preheating treat the organic substance material of Pintsch process.