CN103409155B - Multi-tube rotary furnace and method for performing low-temperature carbonization on materials by using multi-tube rotary furnace - Google Patents
Multi-tube rotary furnace and method for performing low-temperature carbonization on materials by using multi-tube rotary furnace Download PDFInfo
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- CN103409155B CN103409155B CN201210494533.0A CN201210494533A CN103409155B CN 103409155 B CN103409155 B CN 103409155B CN 201210494533 A CN201210494533 A CN 201210494533A CN 103409155 B CN103409155 B CN 103409155B
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Abstract
The invention discloses a multi-tube rotary furnace for performing low-temperature carbonization on materials and a method for performing low-temperature carbonization by using the multi-tube rotary furnace. The multi-tube rotary furnace comprises a feeding device, a cylinder body, a heat-insulating jacket, a hot air inlet, a hot air distribution chamber, a flue gas exhaust port and a discharging device, wherein the feeding device is communicated with a feeding end of the cylinder body; the materials are fed into the cylinder body by the feeding device; the cylinder body can rotate horizontally and enables the materials to move towards a discharging end until being discharged out of the cylinder body; the heat-insulating jacket surrounds the cylinder body, is separated from the space of the cylinder body to form a hot air chamber and is connected with the cylinder body at the end position through a sealing structure; high-temperature flue gas enters the hot air chamber from the hot air inlet to heat the cylinder body; the hot air distribution chamber is communicated with at least one heat exchange tube, is near the discharging end of the cylinder body and is communicated with the hot air chamber so as to distribute the flue gas in the hot air chamber to the at least heat exchange tube; the heat exchange tube is positioned in the cylinder body and extends along the axial direction of the cylinder body; the flue gas exhaust port is communicated with the heat exchange tube so as to discharge the flue gas in the heat exchange tube; the discharging device is communicated with the discharging end of the cylinder body.
Description
Technical field
The application relates to low-rank coal manufacture field, a kind of method that relates in particular to multitube rotary stove and utilize this multitube rotary stove to carry out low-temperature material destructive distillation.
Background technology
The low-temperature pyrolysis of low-rank coal refers under non-oxide condition heats coal, finally obtains the working method of tar, coal gas and semicoke, and this method reaches the object of upgrading by low-rank coal modification.The low-rank coal low-temperature pyrolysis technology of present stage can be divided into internal heat type and external-heat by heat-supplying mode.
A kind of representative art of external-heat destructive distillation is to utilize rotary kiln thereby low-rank coal to be carried out indirect heating and realized the processing method of low temperature pyrogenation.The major objective of this technique is preparation high-quality semicoke, is 6-30mm to the suitable granularity requirements of feed coal.Coal gas is after purifying, can be outward for civilian use or do industrial combustion gas.Its shortcoming is that technique separate unit processing power is little, and thermo-efficiency is low.
Patent of invention 201110161521.1 provides a kind of method of carrying out brown coal upgrading with external heat type rotary furnace, brown coal after drying and dehydrating enter revolution carbide furnace thermo-cracking, obtain semicoke and the high temperature rough gas that contains tar by external jacket Hot-blast Heating and after keeping temperature of charge certain time.Because this kind of method for destructive distillation adopts merely the type of heating of hot blast external jacket, therefore there is the shortcoming that heat interchanging area is little, thermo-efficiency is low, retorting machine treatment scale is little.
Summary of the invention
The application's object is to provide a kind of can overcome the not enough method of utilizing external-heat multitube rotary stove to carry out low-rank coal destructive distillation that destructive distillation product quality is not high, thermo-efficiency is low, separate unit processing power is little that above-mentioned prior art exists
The application's a embodiment discloses a kind of multitube rotary stove for low-temperature pyrolysis material, comprising: feeding unit, be communicated with the feed end of cylindrical shell, and via described feeding unit, described material is sent into described cylindrical shell; Cylindrical shell, can horizontal rotary, and described material is moved until discharge described cylindrical shell to discharge end; Insulation jacket, separates to form hot air chamber, and be connected with described cylindrical shell by sealed structure at end place, and described insulation jacket is static around described cylindrical shell and with described barrel space; Hot-wind inlet, high-temperature flue gas enters described hot air chamber to heat described cylindrical shell from described hot-wind inlet; Hot blast distribution chamber, is communicated with at least one heat transfer tube, near the discharge end of described cylindrical shell, and be communicated with described hot air chamber, the flue gas in hot air chamber is dispensed to described at least one heat transfer tube, wherein, described heat transfer tube is arranged in described cylindrical shell extending axially along described cylindrical shell; Flue gas discharge opening, is communicated with described heat transfer tube, so that the flue gas in described heat transfer tube is discharged; And drawing mechanism, be communicated with the discharge end of described cylindrical shell, comprising: the first discharge port, the hot semicoke of part at described cylindrical shell discharge end place is discharged to described multitube rotary stove; And second discharge port, the raw gas in described cylindrical shell is discharged.
Another embodiment of the application discloses a kind of method of utilizing multitube rotary stove to carry out low-temperature material destructive distillation, comprising: described material is sent into cylindrical shell by feeding unit; Described cylindrical shell makes described material move to discharge end by horizontal rotary; Described cylindrical shell will be discharged from the first discharge port at the hot semicoke of part at described cylindrical shell discharge end place, and the raw gas in described cylindrical shell is discharged from the second discharge port; The hot air chamber that high-temperature flue gas is sent into described cylindrical shell and formed around the insulation jacket of described cylindrical shell from hot-wind inlet, to heat described cylindrical shell; Flue gas in described hot air chamber is sent into hot blast distribution chamber from the discharge end near described cylindrical shell; Described flue gas is dispensed to at least one heat transfer tube in described cylindrical shell in described hot blast distribution chamber; And flue gas in described at least one heat transfer tube is discharged from flue gas discharge opening.
By the application's embodiment, utilize hot flue gas, as thermal source, low-rank coal is carried out to external-heat heating, heat the combination of heating with internal heat exchange tubes by external jacket, optimization distribution and the cascade utilization of energy are realized, retorting machine overall thermal efficiency is improved largely, and thermal medium UTILIZATION OF VESIDUAL HEAT IN is more reasonable.
Brief description of the drawings
Fig. 1 is according to the schematic diagram of the multitube rotary stove for low-temperature pyrolysis material of the application embodiment;
Fig. 2 is the sectional view of the multitube rotary stove of Fig. 1;
Fig. 3 is according to the schematic diagram of the multitube rotary stove for low-temperature pyrolysis material of another embodiment of the application;
Fig. 4 is according to the schematic diagram of the multitube rotary stove for low-temperature pyrolysis material of another embodiment of the application;
Fig. 5 carries out the method 1000 of low-temperature material destructive distillation according to the multitube rotary stove that utilizes of the application embodiment.
Embodiment
Below in conjunction with the embodiment of accompanying drawing DETAILED DESCRIPTION The present application.
Fig. 1 is according to the schematic diagram of the multitube rotary stove for low-temperature pyrolysis material of the application embodiment.Described multitube rotary stove comprises cylindrical shell 1, insulation jacket 2, hot air chamber 3, sealed structure 4, heat transfer tube 6, feeding unit 8, drawing mechanism 9, the first discharge port 10, the second discharge port 12, hot-wind inlet 13, hot blast distribution chamber 14 and flue gas discharge opening 15.
Feeding unit 8 is communicated with the feed end (not indicating in figure) of cylindrical shell 1, via feeding unit 8, material is sent into cylindrical shell 1.Cylindrical shell 1 can horizontal rotary, and makes material to discharge end motion until discharge cylindrical shell 1.Insulation jacket 2 around cylindrical shell 1 and with cylindrical shell 1 separated by spaces with form hot air chamber 3, and be connected with cylindrical shell 1 by sealed structure 4 at end place, to form hot air chamber 3 and extraneous effective sealing, and described insulation jacket is static, can not rotate along with the rotation of cylindrical shell 1.By hot-wind inlet 13, high-temperature flue gas can enter hot air chamber 3 with heating cylindrical shell 1.Hot blast distribution chamber 14 is communicated with at least one heat transfer tube 6, and the discharge end of close cylindrical shell 1 (not indicating in figure), and is communicated with hot air chamber 3, the flue gas in hot air chamber 3 is dispensed to at least one heat transfer tube 6.Heat transfer tube 6 is arranged in cylindrical shell 1 extending axially along cylindrical shell.Flue gas discharge opening 15 is communicated with heat transfer tube 6, so that the flue gas in heat transfer tube 6 is discharged.Drawing mechanism 9 is communicated with the discharge end of cylindrical shell 1, and comprises: the first discharge port 10 (semicoke discharge port), and the hot semicoke of part at cylindrical shell discharge end place is discharged multitube rotary stove by the first discharge port 10; And second discharge port 12 (raw gas discharge port), the raw gas in cylindrical shell 1 is discharged multitube rotary stove by the second discharge port 12.
For example, will after drying dehydration, treat that the coal (smalls or lump coal) of destructive distillation sends into cylindrical shell 1 by feeding unit 8.Cylindrical shell 1 can horizontal rotary, makes the discharge end motion of the body feed tank cylindrical shell 1 that enters cylindrical shell 1.In the rotation process of cylindrical shell 1, material moves to the discharge end of cylindrical shell 1 gradually, during this period, treat that the high-temperature flue gas in material and the hot air chamber 3 of destructive distillation carries out indirect heat exchange, and cracking produces hot semicoke and the raw gas containing tar.Material in cylindrical shell 1 converges at the discharge end place of cylindrical shell 1, and herein, temperature is discharged by first discharge port (semicoke discharge port) 10 of drawing mechanism 9 at the large calorimetric semicoke of 500-600 degree.Meanwhile, the pyrolysis raw gas that the interior pyrolysis of coal of cylindrical shell 1 produces is discharged by the second discharge port (raw gas discharge port) 12.The high-temperature flue gas of the 600-1000 degree being produced by fume generating furnace enters hot air chamber 3 as destructive distillation thermal source from the hot-wind inlet 13 of the feed end near cylindrical shell 1, by adding the barrel of cylindrical shell 1 to heat cylindrical shell 1.Smoke movement in hot air chamber 3, to the end (near the discharge end place of cylindrical shell 1) of hot air chamber 3, then enters hot blast distribution chamber 14.In cylindrical shell 1, be provided with one or more heat transfer tubes 6, hot blast distribution chamber 14 is communicated with heat transfer tube 6.Flue gas is assigned in heat transfer tube 6 in hot blast distribution chamber 14.The direction of motion of flue gas in heat transfer tube 6 is from feed end to discharge end, with the direction of motion of flue gas in hot air chamber 3 be from discharge end to feed end, thereby to the heating of the further adverse current of material.Flue gas in heat transfer tube 6 is discharged by flue gas discharge opening 15, enters follow-up waste heat recovery unit.
By above-mentioned embodiment, utilize hot flue gas, as thermal source, low-rank coal is carried out to external-heat heating, heat the combination of heating with internal heat exchange tubes by external jacket, optimization distribution and the cascade utilization of energy are realized, retorting machine overall thermal efficiency is improved largely, thermal medium UTILIZATION OF VESIDUAL HEAT IN is more reasonable, thereby has solved the problem that prior art destructive distillation product quality is not high, thermo-efficiency is low and separate unit processing power is little.
Select as one, the level attitude of the feed end of cylindrical shell 1 is higher than the level attitude of the discharge end of cylindrical shell.The internal insulation thermal insulation material of insulation jacket 2 is to be anchored at the ceramic fiber module on external heat set of shells inwall after prefabricated.
Select as one, cylindrical shell 1 comprises multiple division plates, and division plate is arranged on the inwall of cylindrical shell 1 and extends axially along cylindrical shell 1, thereby cylindrical shell 1 is divided into multiple chambers 5 (as shown in Figure 2).Two sections of chamber 5 are communicated with respectively at hot blast distribution chamber 14 and flue gas discharge opening 15.
Select as one, heat transfer tube 6 is arranged in each chamber 5, the two ends of heat transfer tube 6 are communicated with hot blast distribution chamber 14 and flue gas discharge opening 15 respectively, to make the high-temperature flue gas in hot air chamber 3 be dispensed to each heat transfer tube 6 by hot blast distribution chamber 14, thereby material is carried out to adverse current heating, then discharge from flue gas discharge opening 15.
Select as one, multitube rotary stove also comprises material-returning device 7, for example be arranged on, in cylindrical shell 1 (being arranged on the center of cylindrical shell 1), the hot semicoke and/or the material that fall into material-returning device 7 from the drawing mechanism of cylindrical shell 1 are applied to deboost, thereby returned to cylindrical shell 1 feed end, with mixed warm with the material that newly adds cylindrical shell 1.Between chamber 5 and material-returning device 7, be formed with ring cavity 11, it is communicated with the second discharge port 12.Chamber 5 also comprises shedding motion (not shown), makes the raw gas in chamber 5 enter ring cavity 11 by shedding motion, thereby discharges from the second discharge port 12.The material that the application's multitube rotary stove adds in the time of normal operation is substantially to equate with the quality of material of discharge, that is to say always there is partial material at stove internal recycle, can play the effect of carrier.
For example, material enters cylindrical shell 1 through feeding unit 8.Along with the rotation of cylindrical shell 1, material is assigned to each chamber 5.Because the feed end of cylindrical shell 1 is higher than discharge end, therefore material in each chamber 5 to the discharge end motion of cylindrical shell 1, until discharge chamber 5.The end of each chamber 5, temperature discharged by first discharge port (semicoke discharge port) 10 of drawing mechanism 9 at the large calorimetric semicoke of 500-600 degree.Simultaneously, the pyrolysis raw gas that the interior material pyrolysis of chamber 5 goes out enters ring cavity 11 by the shedding motion of chamber 5, the interior temperature of ring cavity 11 is that the raw gas of 450-650 degree is discharged by the second discharge port (raw gas outlet) 12 through end channel, enters follow-up clean unit.
Select as one, insulation jacket 2 be separated by spaces two sections, thereby two hot air chamber 3A of formation and 3B, hot air chamber 3A and 3B are connected by hot blast pipe connecting 16, as shown in Figure 3.High-temperature flue gas enters hot air chamber 3A by hot-wind inlet 13, by the barrel in heat hot air compartment 3A to the heating material in each chamber 5 in cylindrical shell 1.High-temperature flue gas in hot air chamber 3A enters hot air chamber 3B by hot blast pipe connecting.Barrel in high-temperature flue gas heat hot air compartment 3B continues the heating material in each chamber 5 in cylindrical shell 1.In the time that high-temperature flue gas moves near cylindrical shell 1 discharge end place, enter hot blast distribution chamber 14, and then be dispensed in each heat transfer tube 6.High-temperature flue gas in heat transfer tube 6 heats the further adverse current of the material in each chamber 5, and discharges from flue gas discharge opening 15.
Select the multistage that insulation jacket 2 is separated by spaces as one.Insulation jacket 2 is separated by spaces 4 sections, thereby form 4 hot air chamber 3A, 3B, 3C and 3D, as shown in Figure 4.Each hot air chamber is provided with two flue gas mouths 17, and one of them is smoke inlet, and another is exhanst gas outlet.Between each hot air chamber, pass through hot blast pipe connecting 16 connected (with reference to Fig. 3).High-temperature flue gas preferentially enters a certain hot air chamber by a certain flue gas mouth.By heating barrel to the heating material in each chamber 5 in cylindrical shell 1.Then by hot blast pipe connecting 16, high-temperature flue gas is sent into another selected hot air chamber.Because each flue gas mouth of each hot air chamber can be gas approach and also can be exhanst gas outlet, therefore the flue gas flow direction in each hot air chamber can be identical, also can be different.Flue gas enters inlet air plenum 18 by the exhanst gas outlet of last hot air chamber, then enters in hot blast distribution chamber 14.Then high-temperature flue gas is dispensed in each heat transfer tube 6.High-temperature flue gas in heat transfer tube 6 heats the further adverse current of the material in each chamber 5, and discharges from flue gas discharge opening 15.
Fig. 5 carries out the method 1000 of low-temperature material destructive distillation according to the multitube rotary stove that utilizes of the application embodiment.Below in conjunction with the multitube rotary stove described in Fig. 1, the method 1000 shown in Fig. 2 is described.
In step S110, material is sent into cylindrical shell 1 by feeding unit 8.For example, will after drying dehydration, treat that the coal (smalls or lump coal) of destructive distillation sends into cylindrical shell 1 by feeding unit 8.
In step S120, cylindrical shell 1 makes material move to discharge end by horizontal rotary.For example, cylindrical shell 1 can horizontal rotary, makes the discharge end motion of the body feed tank cylindrical shell 1 that enters cylindrical shell 1.In the rotation process of cylindrical shell 1, material moves to the discharge end of cylindrical shell 1 gradually, during this period, treat that the high-temperature flue gas in material and the hot air chamber 3 of destructive distillation carries out indirect heat exchange, and cracking produces hot semicoke and the raw gas containing tar.
In step S130, cylindrical shell 1 is discharged the hot semicoke of part at cylindrical shell 1 discharge end place from the first discharge port 10, and the raw gas in cylindrical shell 1 is discharged from the second discharge port 12.For example, the material in cylindrical shell 1 converges at the discharge end place of cylindrical shell 1, and herein, temperature is discharged by first discharge port (semicoke discharge port) 10 of drawing mechanism 9 at the large calorimetric semicoke of 500-600 degree.Meanwhile, the pyrolysis raw gas that the interior pyrolysis of coal of cylindrical shell 1 produces is discharged by the second discharge port (raw gas discharge port) 12.
In step S140, high-temperature flue gas is from hot-wind inlet 13 is sent into cylindrical shell 1 and the hot air chamber 3 forming around the insulation jacket 2 of cylindrical shell 1, to heat cylindrical shell 1.For example, the high-temperature flue gas of the 600-1000 degree being produced by fume generating furnace enters hot air chamber 3 as destructive distillation thermal source from the hot-wind inlet 13 of the feed end near cylindrical shell 1, by adding the barrel of cylindrical shell 1 to heat cylindrical shell 1.
In step S150, the flue gas in hot air chamber 3 is sent at least one heat transfer tube 6 in cylindrical shell 1 from the discharge end near cylindrical shell 1.For example, the smoke movement in hot air chamber 3, to the end (near the discharge end place of cylindrical shell 1) of hot air chamber 3, then enters hot blast distribution chamber 14.
In step S160, flue gas is dispensed to at least one heat transfer tube 6 in cylindrical shell 1 in hot blast distribution chamber 14.For example, be provided with one or more heat transfer tubes 6 in cylindrical shell 1, hot blast distribution chamber 14 is communicated with heat transfer tube 6.Flue gas is assigned in heat transfer tube 6 in hot blast distribution chamber 14, and the direction of motion of flue gas in heat transfer tube 6 is from feed end to discharge end, with the direction of motion of flue gas in hot air chamber 3 be from discharge end to feed end, thereby to the heating of the further adverse current of material.
In step S170, the flue gas in heat transfer tube 6 is discharged via flue gas discharge opening 15.For example, the flue gas in heat transfer tube 6 is discharged by flue gas discharge opening 15, enters follow-up waste heat recovery unit.
The order that it will be understood by those skilled in the art that above-mentioned steps is unfixing, and the order that flue gas is advanced can carry out also can interlocking and carrying out with the order that material is advanced simultaneously.
Select as one, the level attitude of the feed end of cylindrical shell 1 is higher than the level attitude of the discharge end of cylindrical shell.The internal insulation thermal insulation material of insulation jacket 2 is to be anchored at the ceramic fiber module on external heat set of shells inwall after prefabricated.Cylindrical shell 1 comprises multiple division plates, and division plate is arranged on the inwall of cylindrical shell 1 and extends axially along cylindrical shell 1, thereby cylindrical shell 1 is divided into multiple chambers 5 (as shown in Figure 2).Two sections of chamber 5 are communicated with respectively at hot blast distribution chamber 14 and flue gas discharge opening 15.Heat transfer tube 6 is arranged in each chamber 5, the two ends of heat transfer tube 6 are communicated with hot blast distribution chamber 14 and flue gas discharge opening 15 respectively, to make the high-temperature flue gas in hot air chamber 3 be dispensed to each heat transfer tube 6 by hot blast distribution chamber 14, thereby material is carried out to adverse current heating, then discharge from flue gas discharge opening 15.Multitube rotary stove also comprises material-returning device 7, for example be arranged on, in cylindrical shell 1 (being arranged on the center of cylindrical shell 1), the hot semicoke and/or the material that fall into material-returning device 7 from the drawing mechanism of cylindrical shell 1 are applied to deboost, thereby returned to cylindrical shell 1 feed end, with mixed warm with the material that newly adds cylindrical shell 1.Between chamber 5 and material-returning device 7, be formed with ring cavity 11, it is communicated with the second discharge port 12.Chamber 5 also comprises shedding motion (not shown), makes the raw gas in chamber 5 enter ring cavity 11 by shedding motion, thereby discharges from the second discharge port 12.
For example, in step S110, material is sent into cylindrical shell 1 by feeding unit 8.For example, will after drying dehydration, treat that the coal (smalls or lump coal) of destructive distillation sends into cylindrical shell 1 by feeding unit 8.
In step S120, cylindrical shell 1 makes material move to discharge end by horizontal rotary.For example, cylindrical shell 1 can horizontal rotary, and along with the rotation of cylindrical shell 1, material is assigned to each chamber 5.Because the feed end of cylindrical shell 1 is higher than discharge end, therefore material in each chamber 5 to the discharge end motion of cylindrical shell 1, until discharge chamber 5.In the rotation process of cylindrical shell 1, material moves to the discharge end of cylindrical shell 1 gradually, during this period, treat that the high-temperature flue gas in material and hot air chamber 3 and the heat transfer tube 6 of destructive distillation carries out indirect heat exchange, and cracking produces hot semicoke and the raw gas containing tar.
In step S130, cylindrical shell 1 is discharged the hot semicoke of part at cylindrical shell 1 discharge end place from the first discharge port 10, and the raw gas in cylindrical shell 1 is discharged from the second discharge port 12.For example, the material in cylindrical shell 1 converges at the end of the chamber 5 at the discharge end place of cylindrical shell 1, and herein, temperature is discharged by first discharge port (semicoke discharge port) 10 of drawing mechanism 9 at the large calorimetric semicoke of 500-600 degree.Simultaneously, the pyrolysis raw gas that the interior material pyrolysis of chamber 5 goes out enters ring cavity 11 by the shedding motion of chamber 5, the interior temperature of ring cavity 11 is that the raw gas of 450-650 degree is discharged by the second discharge port (raw gas outlet) 12 through end channel, enters follow-up clean unit.
In step S140, high-temperature flue gas is from hot-wind inlet 13 is sent into cylindrical shell 1 and the hot air chamber 3 forming around the insulation jacket 2 of cylindrical shell 1, to heat cylindrical shell 1.For example, the high-temperature flue gas of the 600-1000 degree being produced by fume generating furnace enters hot air chamber 3 as destructive distillation thermal source from the hot-wind inlet 13 of the feed end near cylindrical shell 1, by adding the barrel of cylindrical shell 1 to heat cylindrical shell 1.
In step S150-and step S170 is same as described above, do not repeat them here.
Select as one, insulation jacket 2 be separated by spaces two sections, thereby two hot air chamber 3A of formation and 3B, hot air chamber 3A and 3B are connected by hot blast pipe connecting 16, as shown in Figure 3.S130 is same as described above for step S110-step, does not repeat them here.
For example, in step S140, high-temperature flue gas enters hot air chamber 3A by hot-wind inlet 13, by the barrel in heat hot air compartment 3A to the heating material in each chamber 5 in cylindrical shell 1.Then the high-temperature flue gas in hot air chamber 3A enters hot air chamber 3B by hot blast pipe connecting.Barrel in high-temperature flue gas heat hot air compartment 3B continues the heating material in each chamber 5 in cylindrical shell 1.
In step S150, the flue gas in hot air chamber 3B is sent at least one heat transfer tube 6 in cylindrical shell 1 from the discharge end near cylindrical shell 1.Then in step S160, flue gas is dispensed to at least one heat transfer tube 6 in cylindrical shell 1 in hot blast distribution chamber 14.Then in step S170, the flue gas in heat transfer tube 6 is discharged via flue gas discharge opening 15.
Select the multistage that insulation jacket 2 is separated by spaces as one.Insulation jacket 2 is separated by spaces 4 sections, thereby form 4 hot air chamber 3A, 3B, 3C and 3D, as shown in Figure 4.Each hot air chamber is provided with two flue gas mouths 17, and one of them is smoke inlet, and another is exhanst gas outlet.Between each hot air chamber, pass through hot blast pipe connecting 16 connected (with reference to Fig. 3).S130 is same as described above for step S110-step, does not repeat them here.
For example, in step S140, high-temperature flue gas preferentially enters a certain hot air chamber by a certain flue gas mouth.By heating barrel to the heating material in each chamber 5 in cylindrical shell 1.Then by hot blast pipe connecting 16, high-temperature flue gas is sent into another selected hot air chamber.Because each flue gas mouth of each hot air chamber can be gas approach and also can be exhanst gas outlet, therefore the flue gas flow direction in each hot air chamber can be identical, also can be different.
In step S150, flue gas enters inlet air plenum 18 by the exhanst gas outlet of last hot air chamber, then enters in hot blast distribution chamber 14.Then in step S160, high-temperature flue gas is dispensed in each heat transfer tube 6.Then in step S170, the high-temperature flue gas in heat transfer tube 6 heats the further adverse current of the material in each chamber 5, and discharges from flue gas discharge opening 15.
These are only the application's preferred implementation; not thereby limit the scope of the claims of the application; every equivalent structure or conversion of equivalent flow process that utilizes present specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in the application's scope of patent protection.
Claims (12)
1. for a multitube rotary stove for low-temperature pyrolysis material, comprising:
Feeding unit, is communicated with the feed end of cylindrical shell, via described feeding unit, described material is sent into described cylindrical shell;
Cylindrical shell, can horizontal rotary, and described material is moved until discharge described cylindrical shell to discharge end;
Insulation jacket, separates to form hot air chamber, and be connected with described cylindrical shell by sealed structure at end place, and described insulation jacket is static around described cylindrical shell and with described barrel space;
Hot-wind inlet, high-temperature flue gas enters described hot air chamber to heat described cylindrical shell from described hot-wind inlet;
Hot blast distribution chamber, is communicated with at least one heat transfer tube, near the discharge end of described cylindrical shell, and be communicated with described hot air chamber, the flue gas in hot air chamber is dispensed to described at least one heat transfer tube, wherein, described heat transfer tube is arranged in described cylindrical shell extending axially along described cylindrical shell;
Flue gas discharge opening, is communicated with described heat transfer tube, so that the flue gas in described heat transfer tube is discharged; And
Drawing mechanism, is communicated with the discharge end of described cylindrical shell, comprising:
The first discharge port, discharges described multitube rotary stove by the hot semicoke of part at described cylindrical shell discharge end place; And
The second discharge port, discharges the raw gas in described cylindrical shell.
2. multitube rotary stove as claimed in claim 1, wherein, described cylindrical shell comprises:
Multiple division plates, are arranged on cylinder inboard wall and along the extending axially of described cylindrical shell, so that described cylindrical shell is divided into multiple chambers, and the end place of described multiple chambers is communicated with described hot blast distribution chamber and described flue gas discharge opening respectively.
3. multitube rotary stove as claimed in claim 2, also comprises:
Material-returning device, is arranged in described cylindrical shell, will fall into the hot semicoke of described material-returning device from the described drawing mechanism of described cylindrical shell and send back to the feed end of described cylindrical shell, with the mixed temperature of the material that newly adds described cylindrical shell; And
Ring cavity, is formed between described chamber and described material-returning device, is communicated with described the second discharge port;
Described chamber comprises:
Shedding motion, makes the raw gas in described chamber enter described ring cavity by described shedding motion, thereby discharges from described the second discharge port.
4. multitube rotary stove as claimed in claim 1, wherein, the multistage that described insulation jacket is separated by spaces, thus multiple hot air chambers formed;
Described multitube rotary stove also comprises:
At least one hot blast pipe connecting, every two hot air chambers are communicated with by a described hot blast pipe connecting, make the high-temperature flue gas that enters a hot air chamber from described hot-wind inlet enter another hot air chamber by described hot blast pipe connecting.
5. multitube rotary stove as claimed in claim 4, also comprises:
Inlet air plenum, is communicated with in described multiple hot air chambers one and described hot blast distribution chamber, makes the high-temperature flue gas that enters hot air chamber by hot-wind inlet enter described hot blast distribution chamber by inlet air plenum.
6. the multitube rotary stove as described in claim 1-5 any one, wherein, the level attitude of the feed end of described cylindrical shell is higher than the level attitude of the discharge end of described cylindrical shell.
7. utilize multitube rotary stove to carry out a method for low-temperature material destructive distillation, comprising:
Described material is sent into cylindrical shell by feeding unit;
Described cylindrical shell makes described material move to discharge end by horizontal rotary;
Described cylindrical shell will be discharged from the first discharge port at the hot semicoke of part at described cylindrical shell discharge end place, and the raw gas in described cylindrical shell is discharged from the second discharge port;
The hot air chamber that high-temperature flue gas is sent into described cylindrical shell and formed around the insulation jacket of described cylindrical shell from hot-wind inlet, to heat described cylindrical shell;
Flue gas in described hot air chamber is sent into hot blast distribution chamber from the discharge end near described cylindrical shell;
Described flue gas is dispensed to at least one heat transfer tube in described cylindrical shell in described hot blast distribution chamber; And
Flue gas in described at least one heat transfer tube is discharged from flue gas discharge opening.
8. method as claimed in claim 7, wherein, in described cylindrical shell, be provided with multiple division plates, cylinder inboard wall extending axially along described cylindrical shell, so that described cylindrical shell is divided into multiple chambers, and the end place of described multiple chambers is communicated with described hot blast distribution chamber and described flue gas discharge opening respectively.
9. method as claimed in claim 8, wherein, described multitube rotary stove also comprises:
Material-returning device, is arranged in described cylindrical shell; And
Ring cavity, is formed between described chamber and described material-returning device;
Described method also comprises:
The hot semicoke that falls into described material-returning device from the described drawing mechanism of described cylindrical shell is sent back to the feed end of described cylindrical shell, with mixed warm with the material that newly adds described cylindrical shell;
Described raw gas enters described chamber from the opening of described chamber; And
Discharge from described the second discharge port through described ring cavity.
10. method as claimed in claim 7, wherein, the multistage that described insulation jacket is separated by spaces, thus multiple hot air chambers formed;
Described multitube rotary stove also comprises at least one hot blast pipe connecting, and every two described hot air chambers are communicated with by a described hot blast pipe connecting;
Described method also comprises:
The high-temperature flue gas that enters a hot air chamber from described hot-wind inlet enters another hot air chamber by described hot blast pipe connecting.
11. methods as claimed in claim 10, wherein, described multitube rotary stove also comprises:
Inlet air plenum, is communicated with in described multiple hot air chambers one and described hot blast distribution chamber;
Described method also comprises:
Make the high-temperature flue gas that enters hot air chamber by hot-wind inlet enter described hot blast distribution chamber by inlet air plenum.
12. methods as described in claim 7-11 any one, wherein, the level attitude of the feed end of described cylindrical shell is higher than the level attitude of the discharge end of described cylindrical shell.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210494533.0A CN103409155B (en) | 2012-11-27 | 2012-11-27 | Multi-tube rotary furnace and method for performing low-temperature carbonization on materials by using multi-tube rotary furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210494533.0A CN103409155B (en) | 2012-11-27 | 2012-11-27 | Multi-tube rotary furnace and method for performing low-temperature carbonization on materials by using multi-tube rotary furnace |
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| CN103409155A CN103409155A (en) | 2013-11-27 |
| CN103409155B true CN103409155B (en) | 2014-08-27 |
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