WO2014166397A1 - Dispositif générateur de vapeur pour la réaction eau-gaz d'un procédé de gazéification par pyrolyse d'une gangue de charbon - Google Patents

Dispositif générateur de vapeur pour la réaction eau-gaz d'un procédé de gazéification par pyrolyse d'une gangue de charbon Download PDF

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Publication number
WO2014166397A1
WO2014166397A1 PCT/CN2014/075021 CN2014075021W WO2014166397A1 WO 2014166397 A1 WO2014166397 A1 WO 2014166397A1 CN 2014075021 W CN2014075021 W CN 2014075021W WO 2014166397 A1 WO2014166397 A1 WO 2014166397A1
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Prior art keywords
gas
steam
pipe
water
combustion
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PCT/CN2014/075021
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English (en)
Chinese (zh)
Inventor
王新民
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山西鑫立能源科技有限公司
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Publication of WO2014166397A1 publication Critical patent/WO2014166397A1/fr

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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
    • C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
    • 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
    • C10B3/00—Coke ovens with vertical chambers
    • 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
    • C10B3/00—Coke ovens with vertical chambers
    • C10B3/02—Coke ovens with vertical chambers with heat-exchange devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
    • C10J3/60—Processes
    • C10J3/62—Processes with separate withdrawal of the distillation products
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Definitions

  • the invention relates to a technology for pyrolysis gasification of coal gangue, in particular to a steam generating device for water gas reaction of pyrolysis gasification of coal gangue.
  • Coal gangue - the stone selected from the raw coal is the waste residue of the coal preparation plant. It is not easy to handle. China has hundreds of millions of tons of coal gangue that cannot be used every year, and it still continues to discharge about 100Mt per year, not only accumulating land, but also It can spontaneously pollute the air or cause fires, causing serious environmental pollution.
  • coal gangue Due to billions of years of coalification, coal gangue contains 20-30% of carbon, oil and gas, of which oil and gas account for 11-15% and carbon accounts for 7-15%. Pyrolysis and gasification of coal gangue to obtain oil and gas products and 70-80% solid products (components of silica, alumina, ferric oxide, titanium dioxide, calcium oxide, magnesium oxide, potassium oxide, sodium oxide, The composition of phosphorus pentoxide, manganese oxide and sulfur trioxide is a clinker of silicon-aluminum refractory materials, which has economic value and social benefits.
  • the inventors have long studied the physical properties of coal gangue and the pyrolysis gasification process of high temperature coal, and innovated a new set of high-temperature pyrolysis gasification integrated process and device for coal gangue.
  • the invention provides a steam generating device for coal gas pyrolysis gasification reaction of coal gangue, which uses the waste heat of the solid product of coal gangue pyrolysis to generate water steam, saves energy consumption, and at the same time reduces the temperature of the solid product and facilitates solidity. The discharge of the product.
  • the steam generating device for coal gas pyrolysis gasification reaction comprises a ring-shaped hollow metal box, a steam package and a steam drum inlet pipe, a steam drum output pipe, and the annular hollow metal box body is installed at the bottom of the furnace body, and the annular hollow metal box body
  • the inner ring cavity is connected to the lower part of the low temperature drop greenhouse of the material cooling device, and the annular hollow metal box body is formed with a relatively sealed furnace water bag for storing water, and the water body of the furnace body is connected with the inlet pipe and the steam drum inlet pipe.
  • the inlet pipe is connected to the water storage tank
  • the steam drum inlet pipe is connected to the steam bag
  • the steam packet outlet pipe of the steam package and the steam of the material cooling device are connected to the other end of the pipe.
  • the inner ring cavity of the annular hollow metal casing of the steam generating device has a large upper and lower funnel shape.
  • the invention utilizes the waste heat of the solid product in the low temperature drop greenhouse to heat the water in the water bag of the furnace body to form water steam, without additional heating energy consumption, the water steam enters the steam package through the steam drum input pipe, and the water vapor in the steam package passes through the steam.
  • the water supply steam is introduced into the low temperature drop greenhouse of the material cooling device, so that the water gas reaction can be continuously and smoothly performed continuously.
  • Figure 1 is a schematic view of a coal gangue pyrolysis gasification furnace of the present invention
  • Figure 2 is a schematic view of a gas commutator of the present invention
  • Figure 3 is a schematic view of the upper plate of the gas commutator of the present invention.
  • Figure 4 is a schematic view of the lower tray of the gas commutator of the present invention.
  • Figure 5 is a cross-sectional view taken along line c-c of Figure 3;
  • Figure 6 is a schematic view showing the connection of the gas commutator and the gas heater pipe network of the present invention.
  • Figure 7 is a schematic cross-sectional view of the t-t in Figure 1;
  • Figure 8 is a schematic cross-sectional view taken along line u-u of Figure 1;
  • Figure 9 is a schematic cross-sectional view taken along line v-v of Figure 1;
  • Figure 10 is a schematic view of the central support bow of the present invention (a schematic cross-sectional view taken at x-x in Figure 1);
  • Figure 11 is a view of the steam passage of the present invention (a schematic cross-sectional view at y-y in Figure 1);
  • Figure 12 is a schematic view of a steam packet line of the present invention (a schematic cross-sectional view taken at z-z in Figure 1);
  • Figure 13 is a schematic view showing the electrical connection of the industrial control center of the present invention.
  • the coal gangue is processed into a particle size of 0 to 20 mm, and the coal gangue scrap is dehydrated and dried in this particle size range, and the drying is sufficient, and the dehydration efficiency is high, but this does not constitute a limitation on the coal gangue required for the present invention.
  • the hot exhaust gas generated after the combustion of the net gas produced by the high-temperature pyrolysis of coal gangue and the waste gasification produced by the water gas reaction is used for the crushed coal gangue pellets to be subjected to humidity conditioning and dehydration before being charged into the furnace.
  • the coal gangue pyrolysis device 6 is disposed in the middle of the furnace body 91, and mainly includes a pyrolysis gasification chamber 61, an external gas heating device 64, an internal gas heating device 67, a gas reversing device 66, and a central support bow 65.
  • the pyrolysis gasification chamber 61 is formed of an annular space by the inner and outer annular walls 612 and 611 of the refractory heat conductive material, and is heated by the outer gas around the outer circumference of the pyrolysis gasification outdoor wall 611 ring.
  • the device 64, the pyrolysis gasification indoor ring wall 612 is an inner gas heating device 67, wherein the outer gas heating device 64 is mainly a plurality of groups (the group 9 of this example) having the same structure of the first gas heater 62 and the second gas.
  • the heater 60 is constructed (see FIG. 1 and FIG. 2), as shown in FIG. 1, FIG. 8, and FIG. 9. Since the pyrolysis gasification chamber 61 has a high height, the external gas heating device 64 is mainly divided into upper, middle and lower three. Segment heating, each segment has 9 sets of first gas heater 62 and second gas heater 60 with the same structure, and the internal gas heating device 67 is mainly divided into upper and lower two-stage heating, and each group has 6 sets of the same structure.
  • the combined third gas heater 68 and the fourth gas heater 69 are configured.
  • the first gas heater 62 mainly includes a first combustion chamber 621, a first gas inlet branch pipe 622 and a first heat storage heat exchanger 624, and the first gas inlet branch pipe 622 passes through the furnace.
  • the outer wall of the body 91 opens into the first combustion chamber 621.
  • the first combustion chamber 621 is surrounded by a refractory material, an outer wall of the furnace body 91, and a refractory and heat-conductive material, which is composed of a pyrolysis gasification outdoor ring wall 611 and an outer fire channel partition wall 625.
  • a relatively closed gas burning fire As shown in FIG. 1 and FIG. 9, the first combustion chamber 621 is surrounded by a refractory material, an outer wall of the furnace body 91, and a refractory and heat-conductive material, which is composed of a pyrolysis gasification outdoor ring wall 611 and an outer fire channel partition wall 625.
  • a relatively closed gas burning fire is surrounded by a refractory material, an outer wall of the furnace body 91, and a refractory and heat-conductive material, which is composed of a pyrolysis gasification outdoor ring wall 611 and an outer fire channel partition wall 625.
  • the first heat storage heat exchanger 624 includes a first heat storage chamber 626, a first heat storage body 623, a first air inlet branch pipe 627, and a first combustion exhaust gas discharge branch pipe 628;
  • the heat chamber 626 is disposed in the outer wall of the furnace body 91.
  • the first heat storage body 623 is disposed in the first heat storage chamber 626.
  • One end of the first heat storage chamber 626 leads to the bottom of the first combustion chamber 621, and the other end is respectively connected to the first wall.
  • the air enters the branch pipe 627 and the first combustion exhaust gas discharge branch pipe 628.
  • a first one-way air valve 629 is provided between the first air inlet branch 627 and the first heat storage chamber 626, and the first one-way air valve 629 allows air to enter the tube 627 from the first air and the first A heat storage chamber 626 flows into the first combustion chamber 621;
  • a first one-way exhaust valve 620 is disposed between the first combustion exhaust gas exhaust branch 628 and the first heat storage chamber 626, and the first one-way exhaust valve 620 allows the gas to burn the exhaust gas.
  • the second gas heater 60 of the same structure mainly includes a second combustion chamber 601, a second gas inlet branch 602, and a second heat storage heat exchanger 604.
  • the second combustion chamber 601 is made of a refractory material, an outer wall of the furnace body 91, and a refractory heat-conducting material, and the pyrolysis gasification outdoor ring wall 611 and the outer fire channel partition wall 625 are relatively closed. The gas burns the fire.
  • the second gas entering branch pipe 602 passes through the outer wall of the furnace body 91 to the first combustion chamber 601.
  • the second heat storage heat exchanger 604 includes a second heat storage chamber 606, a second heat storage body 603, a second air inlet branch pipe 607, and a second combustion exhaust gas discharge branch pipe 608, and a second heat storage chamber 606.
  • the second heat storage body 603 is disposed in the second heat storage chamber 606.
  • the second heat storage chamber 606 has one end leading to the bottom of the second combustion chamber 601, and the other end is connected to the second air inlet branch.
  • a second one-way exhaust valve 600 is disposed between the second combustion exhaust gas exhaust pipe 608 and the second heat storage chamber 606, and the second one-way exhaust gas valve 600 allows the gas combustion exhaust gas to flow from the second combustion chamber 601 through the second heat storage.
  • the chamber 606 is finally discharged from the second combustion exhaust gas discharge branch pipe 608 (of course, using the gas reversing device 66 as described below, when the air main pipe 667 is disconnected from the first air branch pipe 6671, the air main pipe 667 is connected to the second air branch pipe 6673.
  • the combustion exhaust gas main pipe 669 and the first combustion exhaust gas branch pipe 6691 are also connected, and the corresponding combustion exhaust gas main pipe 669 and the second combustion exhaust gas branch pipe 6693 are also cut off; instead, the second one-way air valve 609 can be replaced. And the function of the second one-way exhaust valve 600).
  • a top portion of the outer fire passage partition 625 between the first combustion chamber 621 and the immediately adjacent second combustion chamber 601 is provided with a combustion chamber through hole 6251, and the combustion chamber through hole 6251 will be the first combustion chamber. 621 and the immediately adjacent second combustion chamber 601 are connected to form a group.
  • the external gas heating device 64 has a total of 18 outer fire passage partition walls 625 partition walls to form 9 groups of associated combustion groups; As shown in the figure; because the pyrolysis gasification chamber 61 has a high height, wherein the external gas heating device 64 is mainly divided into upper, middle and lower three-stage heating, each group has 9 groups of the same structure and associated with the first gas heater 62, the second The gas heater 60 is constructed.
  • each combustion chamber is further provided with a combustion chamber temperature monitoring hole 6201 and a combustion chamber observation hole 6202 on the outer wall of the furnace body 91.
  • the combustion chamber observation hole 6202 allows the technician to visually observe the gas combustion of each combustion chamber.
  • a combustion chamber temperature table 6201 is provided in the combustion chamber temperature monitoring hole 6201 for temperature monitoring of the combustion chamber to facilitate evaluation of the coal pyrolysis process.
  • the combustion chamber temperature table 6203 is associated with the industrial control center 90, and the temperature data of the combustion chamber temperature table 6203 is automatically collected by the industrial control center 90.
  • the gas reversing device 66 includes an upper disc 661, a lower disc 662, a rotary commutating motor 663, an air blower 664, a gas blower 665, an exhaust fan 666, and a lower disc. 662 is respectively connected with an air main pipe 667 and a first air pipe 6371, a second air pipe 6673, a gas main pipe 668 and a first gas pipe 6681, a second gas pipe 6683, a combustion exhaust gas main pipe 669 and a second combustion exhaust gas pipe 6693.
  • a first combustion exhaust gas branch 6691 wherein the second combustion exhaust gas branch 6693 and the first combustion exhaust gas branch 6691 and the first air branch pipe 6671 and the second air branch pipe 6673 and the first gas pipe 6681 and the second gas pipe 6681 are disposed. Reversed (shown in Figure 3, Figure 4, Figure 6).
  • the upper plate 661 is attached to the upper plate 662, and the upper plate 661 is respectively provided with an air connecting pipe 6672, a gas connecting pipe 6682, and a combustion exhaust pipe connecting pipe 6692.
  • the motor 663 drives the upper disk 661 to reciprocally rotate on the lower disk 662 to realize that the air main pipe 667 continuously switches on and off with the first air pipe 6671 and the second air pipe 6673, and the gas main pipe 668 continuously communicates with the first gas pipe 6681 and the
  • the two gas manifolds 6683 are switched on and off, and the combustion exhaust gas controller 669 is continuously switched on and off with the second combustion exhaust gas branch 6693 and the first combustion exhaust gas branch 6691 (with the first air branch 6671 and the second air branch 6673 and
  • the switching of the first gas branch 6681 and the second gas branch 6683 is just the opposite).
  • two sets of surrounding pipes are further disposed on the outer circumference of the furnace body 91, including a first air surrounding pipe 6674, a first gas surrounding pipe 6684, a first combustion exhaust gas surrounding pipe 6694, and a second air surrounding.
  • the first air enclosure 6674 connects the first air branch 6671 and the first air inlet branch 627, and the first air branch 6671, the first air envelope 6674, and the first air enter the branch pipe. 627, the first heat storage chamber 626 and the first combustion chamber 621 form the same passage;
  • the first gas enclosure 6684 connects the first gas manifold 6681 and the first gas inlet branch 622, and the first gas manifold 6681, the first gas enclosure 6684, the first gas inlet branch 622 and the first combustion.
  • Room 621 constitutes the same passage;
  • the first combustion exhaust gas pipe 6694 connects the first combustion exhaust gas pipe 6691 with the first combustion exhaust gas discharge branch pipe 628, and the first combustion exhaust gas pipe 6691, the first combustion exhaust gas pipe 6694, and the first combustion exhaust gas.
  • the discharge branch pipe 628 and the first heat storage chamber 626 form the same passage as the combustion chamber 621.
  • the second air enclosure 6675 connects the second air branch 6673 and the second air inlet branch 607, and the second air branch 6673, the second air envelope 6675, the second air enters the branch 607, and the second heat storage.
  • the cavity 606 and the second combustion chamber 601 form the same passage;
  • the second gas sewer 6685 connects the second gas pipe 6683 and the second gas inlet branch 602, and the second gas pipe 6683, the second gas pipe 6685, the second gas enters the branch pipe 602, and the second combustion.
  • Room 601 constitutes the same passage;
  • the second combustion exhaust gas pipe 6695 connects the second combustion gas branch pipe 6693 with the second combustion exhaust gas discharge branch pipe 608, and discharges the second combustion exhaust gas pipe 6693, the second combustion exhaust gas pipe 6695, and the second combustion exhaust gas.
  • the branch pipe 608, the second heat storage chamber 606 and the second combustion chamber 601 form the same passage.
  • the example further includes a gas reversing device controller 906 for controlling the rotary commutating motor 663, air fan 664, gas fan 665, and exhaust fan 666, and the gas reversing device electrical controller 906
  • the rotary commutating motor 663, air fan 664, gas fan 665, and exhaust fan 666 can also be directly controlled by the industrial control center 90, so the gas is set here.
  • the reversing device controller 906 does not constitute a limitation to the scope of protection of this example.
  • the heating method of the external gas heating device 64 is:
  • the industrial control center 90 starts the rotary reversing motor 663 to drive the upper plate 661 to rotate on the lower plate 662, the air main pipe 667 is connected to the first air branch pipe 6671, and the air main pipe 667 and the second air branch pipe 6673 are cut off; meanwhile, the gas The main pipe 668 is also connected to the first gas pipe 6681, and the gas main pipe 668 and the second gas pipe 6668 are in a cut-off state; at the same time, the combustion exhaust gas main pipe 669 is also cut off from the first combustion exhaust gas pipe 6691, and the corresponding combustion exhaust gas main pipe is cut off. 669 is in an on state with the second combustion exhaust gas branch 6693;
  • the industrial control center 90 starts the air fan 664, the gas fan 665 and the exhaust fan 666; the air fan 664 blows the air into the air main pipe 667, and the air sequentially enters through the air connecting pipe 6672, the first air pipe 6371, and the first air pipe.
  • the first air entering branch pipe 627 enters the first heat accumulating chamber 626, and heats the air by using the heat released by the first heat accumulator 623 to enter the first combustion chamber 621; meanwhile, the gas fan 665 passes the waste gas After the product is recovered and purified, the net gas is taken into the gas main pipe 668, and the gas enters the gas connecting pipe 6682, the first gas pipe 6681, the first gas pipe 6684, and the first gas entering branch pipe 622 into the first combustion chamber 621 for combustion.
  • the first combustion chamber 621 is burned after the gas is burned.
  • the exhaust gas can only enter the second combustion chamber 601 through the combustion chamber through hole 6251 in the upper portion of the outer fire passage partition 625, and then passes through the second heat storage chamber 606.
  • the second heat storage body 603 in the heat storage chamber 606 is subjected to heat absorption and temperature reduction, and is discharged from the second combustion exhaust gas discharge branch pipe 608, the second combustion exhaust gas pipe 6695, the second combustion exhaust gas pipe 6693, and the combustion exhaust gas main pipe 669 through the exhaust gas fan 666. ;
  • the industrial control center 90 starts the rotary reversing motor 663 to drive the upper plate 661 to rotate in the opposite direction on the lower plate 662, and the air main pipe 667 is cut off from the first air pipe 6371, and the air main pipe 667 and the second air pipe 6673 are cut off.
  • the gas main pipe 668 and the first gas pipe 6681 are also cut off, the gas main pipe 668 and the second gas pipe 6668 are connected, and at the same time, the combustion exhaust gas main pipe 669 and the first combustion exhaust gas pipe 6691 are also in phase. Turned on, and the corresponding combustion exhaust gas main pipe 669 and the second combustion exhaust gas pipe 6693 are also cut off;
  • the air blower 664 blows air into the air main pipe 667, and the air sequentially enters the second heat storage chamber 606 through the air connection pipe 6672, the second air pipe 6673, the second air pipe 6675, and the second air inlet pipe 607.
  • the heat released by the second heat storage body 603 in the second heat storage chamber 606 heats the air and enters the second combustion chamber 601.
  • the gas fan 665 recovers the waste gas and obtains the net gas into the gas.
  • the main pipe 668, the gas sequentially enters the gas connecting pipe 6682, the second gas pipe 6683, the second gas pipe 6685, and the second gas entering branch pipe 602 enters the second combustion chamber 601 for combustion, at the same time, because the combustion exhaust pipe 669 and The first combustion exhaust gas branch 6691 is turned on, and the corresponding combustion exhaust gas main pipe 669 and the second combustion exhaust gas main pipe 6693 are in a phase cut state, so that the exhaust gas in the second combustion chamber 601 can only pass through the upper portion of the outer fire passage partition wall 625.
  • the combustion chamber through hole 6251 enters the first combustion chamber 621, passes through the first regenerator 626, passes through the first regenerator 603 in the first regenerator 626, and is cooled and cooled, and finally from the first
  • the combustion exhaust gas discharge branch pipe 628, the first combustion exhaust gas pipe 6694, the first combustion exhaust gas pipe 6691, and the combustion exhaust gas pipe 669 are discharged through the exhaust gas fan 666, so the external gas heating device 64 burns the principle after the gas in the first combustion chamber 621 is burned.
  • the generated exhaust gas enters the second combustion chamber 601 from the combustion chamber through hole 6251, and is discharged after the second heat storage body 603 in the second combustion chamber 601 and the second heat storage chamber 606 is cooled by the remaining heat absorption, and vice versa.
  • the exhaust gas generated after the combustion of the gas in the chamber 601 enters the first combustion chamber 621 from the combustion chamber through hole 6251, and is cooled by the first heat storage body 603 in the first combustion chamber 621 and the first heat storage chamber 606 to cool down the remaining heat absorption.
  • the two-in-one operation mode of the gas through the gas reversing device and the heat storage heat exchange operation mode of the regenerative heat exchanger realize the alternating combustion of the two gas heaters associated with the two groups, that is, the gas exchange Feeding air to the combustion chamber of the first gas heater to the combustion chamber, and combusting the hot exhaust gas from the combustion chamber of the second gas heater, and the second heat storage of the hot exhaust gas through the second gas heater
  • the heat absorption of the second regenerator in the heat exchanger is changed to a relatively low temperature exhaust gas discharge; similarly, the gas reversing device sends air to the combustion chamber of the second gas heater, and the net gas is burned while The combustion gas is sucked out from the combustion chamber of the first gas heater, and the hot exhaust gas is cooled by the first heat storage body in the first heat storage heat exchanger of the first gas heater to become a relatively low temperature.
  • Exhaust gas discharge the method of heating the air by using the residual heat of the exhaust gas after combustion of the gas not only makes full use of the waste heat of the exhaust gas after the combustion of the gas, improves the combustion efficiency of the gas in the combustion chamber, but also burns the gas.
  • Exhaust a degree of cool do not consume external energy, play the purpose of energy saving, saving the cost of coal waste pyrolysis and gasification.
  • the internal gas heating device 67 mainly consists of several groups (the 6 groups of this example) having the same structure of the gas heaters 68, 69, because the pyrolysis gasification chamber 61 has a high height and the internal gas heating device 67 is mainly It is mainly divided into upper and lower two-stage heating, and each section has 6 sets of associated third gas heater 68 and fourth gas heater 69 having the same structure, and its composition and combustion principle are related to the first combustion heater described above. 62.
  • the second combustion heater 60 is almost identical.
  • the third gas heater 68 also includes a third combustion chamber 681, a third gas inlet branch 682, a third regenerator 686, a third regenerator 683, and a third air.
  • the branch pipe 687 and the third combustion exhaust gas exhaust pipe branch 688 are entered.
  • the third combustion chamber 681 is made of a refractory heat conductive material, and the pyrolysis gasification indoor ring wall 612 and the inner fire channel partition wall 635 form a relatively closed gas combustion fire passage.
  • the lower third gas inlet branch pipe 682 passes from the lower side of the strip 651 of the center support bow 65 to the third combustion chamber 681, and the third heat storage chamber 686 is disposed at the strip 651.
  • the third regenerator 683 is placed in the third regenerator 686, and one end of the third regenerator 686 extends upward from the underside of the strip 651 of the central support bow 65 through the extension passage 6861.
  • the third end of the third regenerator 686 is connected to a third air inlet branch 687 and a third combustion exhaust gas outlet branch 688, respectively.
  • the third gas inlet branch pipe 682 of the upper stage passes from the lower side of the bow 651 of the center support bow 65 to the third combustion chamber 681 through the fire passage partition wall 635, and the third The heat accumulating chamber 686 is disposed on the furnace body 91 below the strip 651, the third regenerator 683 is placed in the third regenerator 686, and one end of the third regenerator chamber 686 passes through the extending passage 6861 from the center supporting the strip of the bow 65.
  • the lower side of the bow 651 extends through the fire passage partition 635 to the bottom of the third combustion chamber 681, and the other end of the third heat storage chamber 686 is connected to the third air inlet branch 687 and the third combustion exhaust gas exhaust branch 688, respectively.
  • the structure of the fourth gas heater 69 is the same as that of the third gas heater 68, and details are not described herein again, wherein the fourth combustion chamber 691 and the third combustion chamber 681 pass through the combustion chamber passage.
  • the 6305 is turned on to form a group (shown in Figures 1 and 8).
  • the third gas entering branch pipe 682, the third air entering branch pipe 687 and the third combustion exhaust gas discharging branch pipe 688 of the third combustion chamber 681 of the third combustion heater 68 respectively pass through the first gas surrounding pipe 6684.
  • the first air enclosure pipe 6674, the first combustion exhaust gas enclosure 6694 is in communication with the first gas manifold 6681, the first air manifold 6671, and the first combustion exhaust manifold 6691.
  • the fourth gas inlet branch 692, the fourth air inlet branch 697, and the fourth combustion exhaust gas discharge branch 698 of the fourth combustion chamber 691 of the fourth combustion heater 69 pass through the second, respectively.
  • the gas enclosure 6685, the second air enclosure 6675, and the second combustion exhaust enclosure 6695 are in communication with the second gas manifold 6683, the second air conduit 6673, and the second combustion exhaust conduit 6693.
  • combustion principles of the third combustion heater 68 and the fourth gas heater 69 are almost identical to those of the first combustion heater 62 and the second combustion heater 60 described above, and are not described herein again.
  • the center support bow 65 is provided in the furnace cavity because the pyrolysis gasification indoor ring wall 612 and the fire channel partition 635 of the internal combustion heating device 67 are required to be provided by the center support bow 65.
  • the support while at the same time, provides the inner combustion heating device 67 with the laying of various pipes.
  • the center support bow 65 is disposed in the furnace cavity below the pyrolysis gasification chamber 61 and the internal combustion heating device 67, and mainly includes a plurality of strips 651 and a center bow wall 652 of the fire bow.
  • One end of the bow 651 is fixed on the fire ring center ring wall 652, and the other end is fixed on the furnace body 91.
  • the strip bow 651 is arranged around the center of the fire bow center ring wall 652 at a certain angular interval, and the fire bow 651 in this example.
  • the number of third combustion heaters 69 associated with the internal combustion heating device 67 is the same as the total number of fourth combustion heaters 69.
  • a third gas inlet branch 682 and an extension passage 6861 of the third regenerator 686 are disposed in the wall of a fire bow 651, and are disposed in the wall of another adjacent fire bow 651.
  • the fourth gas entering the branch pipe 692 and the extension passage 6961 of the fourth heat storage chamber 696 facilitates the laying of the pipes of the internal combustion heating device 67, so that the various pipes of the internal combustion heating device 67 are arranged in an orderly manner without interference.
  • the temperature of the coal gangue in the pyrolysis gasification chamber is high, the coal gangue is introduced into the water vapor, and the charcoal in the product after the coal gangue pyrolysis meets the superheated steam to react with water gas to form water gas (carbon monoxide and hydrogen).
  • the water gas reaction device 7 includes a pyrolysis gasification chamber 61, a material temperature lowering device 70, and a steam generating device 75.
  • the pyrolysis gasification chamber 61 is located above the center support bow 65, and the material cooling device 70 and the steam generating device 75 are located below the center support bow 65.
  • the material cooling device 70 is disposed at a lower portion of the furnace body 91, including a high temperature drop greenhouse 701, a low temperature drop greenhouse 702, a greenhouse lowering bow 703, a top portion of the high temperature drop greenhouse 701, and a pyrolysis gasification chamber.
  • the bottom of the 61 is connected; the high temperature drop greenhouse 701 and the low temperature drop greenhouse 702 are arranged above and below, and the descending greenhouse bridge bow 703 is disposed between the high temperature drop greenhouse 701 and the low temperature drop greenhouse 702, and the descending greenhouse bridge bow 703 includes a bridge bow 7031 and a steam collecting chamber 704.
  • the steam enters the through pipe 707; the four bridge bows 7031 are radially arranged at an angular interval between the high temperature drop greenhouse 701 and the low temperature drop greenhouse 702 axis center, and the steam collecting chamber 704 is formed in the middle of the bridge bow 7031, and the steam collecting chamber 704 is a column shape.
  • the chamber is provided with a hemispherical hood 708 at the top of the plenum chamber 704.
  • the lower opening of the plenum chamber 704 faces the low temperature drop greenhouse 702; the steam inlet 707 is disposed in the bridge bow 7031, and the steam enters the end of the through tube 707 to the set.
  • the steam chamber 704 has the other end extending beyond the furnace body 91.
  • the steam generating device 75 includes an annular hollow metal casing 755, a steam pack 754 and a steam drum inlet pipe 751, and a steam drum outlet pipe 752.
  • the annular hollow metal casing 755 is installed at the bottom of the furnace body 91.
  • the inner ring cavity 758 of the annular hollow metal box 755 is connected to the lower part of the low temperature drop greenhouse 702 of the material cooling device 70.
  • the annular cavity of the inner ring cavity 758 is in the shape of a large upper and a small funnel, and the annular hollow metal box 755 is formed in the box.
  • the furnace body water bag 753 is relatively sealed for storing water, and the furnace body water bag 753 is connected with an inlet pipe 756 and a steam drum inlet pipe 751.
  • the inlet water pipe 756 is connected to the water storage tank 757, and the steam drum inlet pipe 751 is connected to the steam bag 754.
  • the steam drum outlet pipe 752 of the steam package 754 communicates with the steam inlet pipe 707 at the other end of the material cooling device 70.
  • the principle of the water gas reaction principle of the present invention is:
  • the water vapor in the steam package 754 passes through the steam drum inlet pipe 752 and the steam inlet pipe 707 to the low temperature drop greenhouse 702 of the material cooling device 70, and the water vapor is blown to the low temperature drop greenhouse 702, except for the low temperature drop greenhouse.
  • the water vapor is cascaded into the high temperature drop greenhouse 701, and a large amount of pyrolyzed high temperature solid product is dropped from the pyrolysis gasification chamber 61 into the high temperature drop greenhouse 701. Cooling, the steam is cooled by the pyrolysis gasification solids, and the steam temperature is increased to form superheated steam;
  • the superheated steam enters the pyrolysis gasification chamber 61 through the central support bow 65, and is in contact with the high temperature coal gangue pyrolysis material of the pyrolysis gasification chamber 61, and the charcoal in the solid product after pyrolysis of the coal gangue
  • the superheated steam meets to react with water gas to form water gas (carbon monoxide and hydrogen);
  • the water in the water bag 753 is heated to form water vapor, and the water vapor enters the steam packet 754 through the steam drum inlet pipe 751, and the steam bag 754 is replenished with a large amount of water vapor consumed by the water gas reaction, so that the water gas reaction can be continuously performed without interruption.
  • the large amount of water gas reaction of the present invention is generated in the lower part of the pyrolysis gasification chamber 61 because the coal gangue in the pyrolysis gasification chamber in this section has been relatively pyrolyzed and the temperature is relatively high, at this time from the heat.
  • the bottom of the degassing chamber 61 is connected to high temperature and superheated water vapor, and the superheated steam and the carbon in the solid product after pyrolysis of the coal gangue generate a large amount of water gas; of course, the water vapor is in the high temperature drop greenhouse 701
  • the residual carbon in the solid product after pyrolysis and gasification of the coal gangue also generates water gas, but the amount generated is relatively small, which is The amount of residual carbon in the solid product after coal pyrite gasification is not much, and the water vapor temperature is not too high.
  • the invention utilizes the heat transfer of the solid product of the relatively low temperature after the pyrolysis gasification of the coal gangue to generate water vapor, and then uses the steam to directly contact the solid product with higher temperature to generate superheated steam to reach the water gas reaction.
  • the required temperature promotes a more complete water-gas reaction, which reduces the temperature of the solid product and produces water vapor and superheated steam.
  • Coal gangue produces a gas containing many useful components in the high-temperature pyrolysis gasification process. After the coal gangue pyrolysis, the carbon in the product reacts with the superheated steam to produce water gas (carbon monoxide and hydrogen), which is collectively referred to as waste gas. The waste gas is exported for use.
  • the waste gas derivation device 8 includes a waste gas concentration chamber 81, an inner outlet passage 82, an outer outlet passage 83, an outlet main passage 84, an outlet loop 85, and a waste gas concentration chamber 81.
  • the top of the pyrolysis gasification chamber 61 is integrally formed with the pyrolysis gasification chamber 61; as shown in FIG. 1 and FIG. 8, six inner outlet passages 82 are provided in the fire passage partition wall 635, and the inner outlet passage inlet 821 is passed through.
  • the middle of the inner ring wall 612 leads to the pyrolysis gasification chamber 61, and the inner outlet passage outlet 822 passes through the inner ring wall 612 to the waste gas concentration chamber 81 at the top of the pyrolysis gasification chamber; as shown in Fig. 1 and Fig. 8, 6
  • the outer strip outlet passage 83 is disposed in the outer wall of the furnace body 91.
  • the lower outer outlet passage inlet 831 and the upper outer outlet passage inlet 834 pass through the middle of the outer annular wall 611 to the pyrolysis gasification chamber 61, and the outer outlet passage outlet 832 passes through.
  • the outer ring wall 611 leads to a waste gas concentration chamber 81 at the top of the pyrolysis gasification chamber.
  • the lead-out main passage 84 is disposed in the outer wall of the furnace body 91 of the coal pyrolysis furnace, and the outlet main passage inlet 841 communicates with the waste gas concentration chamber 81 and extends upward to the outside of the furnace body 91.
  • the outlet loop 85 is provided with a waste gas outlet 851 and a waste gas outlet 852.
  • the waste gas concentration chamber 81 also has an annular chamber
  • the six inner outlet passages 82 are respectively It is disposed in the 6-channel fire barrier partition 635, passes through the inner ring wall 612 to the pyrolysis gasification chamber 61, and the six outer outlet passages 83 are respectively disposed in the middle of the outer wall of the furnace body 91 and the outer fire passage partition wall 625.
  • the outer ring wall 611 leads to the pyrolysis gasification chamber 61, wherein since the circumference of the pyrolysis gasification chamber 61 is long, the inner ring wall 612 and the outer ring wall 611 of the pyrolysis gasification chamber 61 are respectively provided with 6 inner lead passage inlets 821 and lower outer outlet passage inlets 831, upper outer outlet passage inlets 834, and because the height of the pyrolysis gasification chamber 61 is high, the inner outlet passage inlet 821 and the lower outer outlet passage inlet 831 are exported.
  • the channel inlet 834 is staggered up and down. As shown in FIG. 1, the inner outlet passage inlet 821 is higher than the lower outer outlet passage inlet 831, but lower than the upper outer outlet passage inlet 834.
  • the structure can be used for the pyrolysis gasification chamber.
  • the waste gas produced in different sections of 61 can be better exported, and there are also 6 sections around the waste gas concentration room 81.
  • the large waste gas main passage 84 leads to the outlet loop 85, so that the purpose of the installation can facilitate the export of a large amount of waste gas in the waste gas concentration chamber 81.
  • a waste gas temperature monitoring hole 811 leading to the waste gas concentration chamber 81 is provided on the outer wall of the furnace body 91, and a waste gas temperature table 812 is placed in the waste gas temperature monitoring hole 811.
  • the waste gas temperature table 812 is electrically connected to the industrial control center 90, and the industrial control center 90 monitors the temperature in the waste gas concentration chamber 81 through the waste gas temperature table 812.
  • the waste gas generated in different sections of the pyrolysis gasification chamber 61 is separately led out from the channel inlet 821 into the inner outlet passage 82, and the lower outer outlet passage inlet 831 and the upper outer outlet passage inlet 834 enter the outer outlet passage.
  • the waste gas concentration chamber 81 is further collected.
  • a large amount of waste gas in the pyrolysis gasification chamber 61 is directly introduced into the waste gas concentration chamber 81, and is led to the outlet loop 85 through the outlet main passage 84, and finally from the waste gas.
  • the outlet 851 is discharged.
  • the example is characterized in that coal gangue pyrolysis, gasification (water gas reaction), steam generation, and waste gas derivation process are integrated into the same furnace body, so that coal gangue pyrolysis, gasification (water gas reaction), steam generation The waste gas is continuously realized.
  • the coal gangue pyrolysis gasification furnace 9 includes a furnace body 91, a furnace silo 92, a coal gangue pyrolysis gasification device 93, a waste gas export device 8, a hinge cage sealing discharge device 96, and a product silo. 94; coal gangue pyrolysis gasification device 93 including coal gangue pyrolysis device 6, water gas reaction device 7, coal gangue pyrolysis device 6, water gas reaction device 7, waste gas export device 8 specific structure see above; into the charge
  • the silo 92 is disposed at the top of the furnace body 91, and the furnace fabric passage 921 is disposed at the top of the furnace body 91.
  • the upper end of the furnace fabric passage 921 communicates with the furnace silo 92, and the lower end of the furnace fabric passage 921 is pyrolyzed with the coal gangue pyrolysis device 6.
  • the gasification chamber 61 is open at the top, and a cage seal discharger 96 is disposed at the bottom of the inner ring cavity 758 of the annular hollow metal casing 755 of the steam generating device 75 of the water gas reaction device 7, and the product silo 94 is placed at the bottom of the furnace body 91.
  • the product silo 94 is connected to the hinged cage sealing discharger 96, and the hinged cage sealing discharger 96 belongs to the prior art, such as a sealed discharger, a seal returner, a sealing feeder and the like on the market.
  • the method of continuous pyrolysis gasification in this example is:
  • the water in the furnace water bag 753 of the annular hollow metal casing 755 of the apparatus 75 is heated to form water vapor, and the water vapor enters the steam pack 754 through the steam drum inlet pipe 751, and the steam pack 754 is replenished with a large amount consumed by the water gas reaction. steam;
  • waste gas The gas generated by the coal gangue in the high-temperature pyrolysis process and the water gas reaction to form the water gas (carbon monoxide and hydrogen) are collectively referred to as waste gas, and the waste gas is exported through the waste gas exporting device 8 provided on the furnace body for the purpose of chemical gasification.
  • waste gas exporting device 8 provided on the furnace body for the purpose of chemical gasification.
  • Production recovery and utilization while the higher temperature waste gas enters the top of the pyrolysis gasification chamber 61 from the top of the pyrolysis gasification unit, and the process of deriving the main passage 84 is again on the top of the pyrolysis gasification chamber 61 entering from the furnace distribution passage 921.
  • the coal gangue pellets charged into the furnace are preheated;
  • the coal gangue pyrolysis gasification process is integrated into the same coal thermal furnace body to realize continuous coal gangue pyrolysis gasification, high production efficiency, small plant surface required for equipment, low labor cost, and gasification after pyrolysis
  • the residual heat in the solid product produces water vapor
  • the high-temperature pyrolysis gasification of the solid product is cooled by steam to produce the high-humidity superheated steam required for the water gas reaction, which has the characteristics of low consumption and environmental protection.
  • the gangue pyrolysis gasification discharges the waste gas at a relatively high temperature.
  • the high-temperature waste gas is sprayed with ammonia water for cooling.
  • the waste gas after the spraying of ammonia water is gas-liquid separation.
  • the mixed liquid after gas-liquid separation contains various useful organic components such as phenol oil, naphthalene oil, washing oil, eucalyptus oil, etc. for industrial refining of other subsidiary products, gas-liquid separation.
  • After the gas is cooled by air cooling, it is purified and recovered by dry method to become net gas, and the net gas can be stored for combustion.
  • the adsorbed net gas is used for combustion to provide a heat source for pyrolysis and gasification of coal gangue.
  • Section 2 Regenerative heating of saturated activated carbon by exhaust gas after combustion with net gas
  • the hot exhaust gas after the combustion of the net gas is used for the saturated activated coke which is purified by adsorption and purification of the waste gas, and is regenerated into unsaturated unsaturated coke by evaporation heating.
  • the hot exhaust gas after the combustion of the net gas is used to adjust the moisture of the coal gangue particles.
  • the hot exhaust gas after the combustion of the net gas is used for humidity conditioning and dewatering of the coal gangue pellets before entering the furnace.
  • the hot exhaust gas after the net gas combustion is used for humidity conditioning and dehydration of the coal gangue pellets before entering the furnace, and the hot exhaust gas is dehydrated, then the water is purified and cooled, and finally the clean low temperature discharge is achieved.
  • the invention controls various electrical equipment used in the processes of coal gangue pyrolysis gasification, waste gas recovery and purification, net gas combustion, waste heat utilization after combustion, and the like, so that thermal cycle continuous coal gangue pyrolysis gasification can be obtained. Going smoothly.
  • thermal cycle continuous coal gangue pyrolysis gasification integrated device and process does not constitute a limitation on the thermal cycle continuous coal gangue pyrolysis gasification integrated device and process protection range.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Gasification And Melting Of Waste (AREA)

Abstract

Cette invention concerne un dispositif générateur de vapeur (75) pour la réaction eau-gaz d'un procédé de gazéification par pyrolyse d'une gangue de charbon, ledit dispositif générateur de vapeur (75) comprenant un corps sous forme de boîte métallique creuse circulaire (755), un tambour à vapeur (754), un tuyau d'admission (751) de tambour à vapeur, et un tuyau d'évacuation (752) de tambour à vapeur. Le corps sous forme de boîte métallique creuse circulaire (755) est monté au fond d'un corps de fourneau (91). Une cavité circulaire intérieure (758) du corps sous forme de boîte métallique creuse circulaire (755) est reliée à la partie basse de la chambre de refroidissement basse température (702) d'un dispositif de refroidissement de matériau (70). Un tambour à eau (753) de corps de fourneau relativement étanche et utilisé pour stocker l'eau est formé à l'intérieur du corps sous forme de boîte métallique creuse circulaire (755). Le tambour à eau (753) de corps de fourneau est relié à un tuyau d'admission d'eau (756) et au tuyau d'admission (751) de tambour à vapeur, le tuyau d'admission d'eau (756) communiquant avec un réservoir d'eau (757) et le tuyau d'admission (751) de tambour à vapeur communiquant avec le tambour à vapeur (754). Le tuyau d'évacuation (752) de tambour à vapeur du tambour à vapeur (754) communique avec une autre extrémité d'un tuyau d'admission de vapeur (707) du dispositif de refroidissement de matériau (70). Selon le dispositif générateur de vapeur (75), la vapeur d'eau est produite par la chaleur résiduelle des produits solides après gazéification par pyrolyse d'une gangue de charbon, des économies d'énergie sont réalisées, les températures ultérieures des produits solides sont réduites, et l'évacuation des produits solides est facilitée.
PCT/CN2014/075021 2013-04-10 2014-04-09 Dispositif générateur de vapeur pour la réaction eau-gaz d'un procédé de gazéification par pyrolyse d'une gangue de charbon WO2014166397A1 (fr)

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