CN111909711A - Double pyrolysis furnace for double pyrolysis incineration treatment of tar residues - Google Patents
Double pyrolysis furnace for double pyrolysis incineration treatment of tar residues Download PDFInfo
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- CN111909711A CN111909711A CN202010625863.3A CN202010625863A CN111909711A CN 111909711 A CN111909711 A CN 111909711A CN 202010625863 A CN202010625863 A CN 202010625863A CN 111909711 A CN111909711 A CN 111909711A
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- flue gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B21/00—Heating of coke ovens with combustible gases
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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
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/02—Multi-step carbonising or coking processes
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Abstract
The invention discloses a double pyrolysis furnace for double pyrolysis incineration treatment of tar residue, which comprises a furnace body shell, a tar residue inlet arranged at the top of the furnace body shell, an upper heating box body and a lower heating box body arranged in an inner cavity of the furnace body shell, wherein the upper heating box body is a conical box body, the top of the conical box body is concave, the annular heating cavity is formed in the furnace body shell, the low-temperature flue gas channel and the high-temperature flue gas channel are further arranged on the periphery of the furnace body shell respectively, the low-temperature flue gas channel is communicated with an inner cavity of the upper heating box body, the high-temperature flue gas channel is communicated with the annular heating cavity and an inner cavity of the lower heating box body respectively, the high-temperature flue gas channel is further connected with a cold flue gas inlet of the low-temperature flue gas channel, a flue gas output pipeline is arranged on the upper portion of the upper heating box body, a dry distillation gas outlet is formed in the top of the furnace body shell, a section of activation cavity is formed in. The invention realizes the harmless, resource and reduction utilization of the tar residue.
Description
Technical Field
The invention relates to the technical field of coal, in particular to a double pyrolysis furnace for double pyrolysis incineration treatment of tar residue.
Background
In the tar separator, the tar and the coal dust at the lowest layer are the tar residue. Coal tar residue contains a large amount of aromatic organic matters, and the dangerous waste number of the coal tar residue is HW11 according to 2016 'national hazardous waste record'.
Because most of the coal tar slag is coal ash and a small part is tar, the coal tar slag is often used as waste to be stacked in a factory to form a kind of industrial waste slag which is difficult to treat.
In view of the above environmental problems of tar residue, it is necessary to develop a treatment technique for tar residue to achieve harmless, recycling and quantitative reduction of coal tar residue.
Disclosure of Invention
The invention aims to solve the technical problem that tar residues are difficult to treat in the prior art, and provides a double pyrolysis furnace for double pyrolysis incineration treatment of the tar residues. The specific technical scheme is as follows:
the utility model provides a two pyrolytic stoves that is used for two pyrolytic incineration disposal of tar sediment, is in including the furnace body shell of erectting the setting tar sediment entry, the setting that furnace body shell top central point put and be the last heating box and the lower heating box of upper and lower adjacent connection, it is little, the big toper box of lower extreme to go up the heating box, the top of toper box is the spill lie in on the furnace body shell the position that the lower heating box corresponds is provided with annular heating chamber the periphery of furnace body shell still is provided with low temperature flue gas passageway and high temperature flue gas passageway respectively, low temperature flue gas passageway with the inner chamber of going up the heating box is linked together, high temperature flue gas passageway respectively with the inner chamber of annular heating chamber and lower heating box is linked together, high temperature flue gas passageway still with low temperature flue gas passageway's cold flue gas entry is connected, the upper portion position of going up the heating box is provided with flue gas output pipeline, the top of furnace body shell is provided with the dry distillation gas export, the bottom of furnace body shell is provided with one section activation chamber, the activation intracavity is connected with the steam spray tube that is used for being activated the charcoal after the pyrolysis into the active carbon, the lower extreme in activation chamber is provided with the active carbon delivery outlet.
Preferably, a tooth-shaped groove is formed in the concave part of the top of the conical box body to facilitate outflow of the tar residues, and a flow guide groove communicated with the tooth-shaped groove is formed in the surface of an outer cone of the conical box body to enable the tar residues to flow downwards in the flow guide groove and be heated for dry distillation.
Preferably, a tar residue preheating box is arranged above the furnace body shell, and a tar residue output port of the tar residue preheating box is connected with a tar residue inlet at the center of the top of the furnace body shell through a pipeline and a feeding sealing grid valve.
Wherein the tar residue preheating box realizes the preheating of the tar residue through a low-pressure steam heating pipe.
According to the invention, a paddle type cooler is arranged below the furnace body shell, and the active carbon output port is output to the paddle type cooler through a feeding sealing grid valve.
In the invention, a combustion furnace is connected between the dry distillation gas outlet at the top of the furnace body shell and the high-temperature flue gas channel through a pipeline.
In the invention, a flue gas output pipeline of the upper heating box body is connected to a low-temperature flue gas inlet of the waste heat boiler, and a cold flue gas outlet of the waste heat boiler is connected to a cold flue gas inlet of the low-temperature flue gas channel through a pipeline and an induced draft fan.
In the invention, the cold flue gas outlet of the waste heat boiler is also connected to the flue gas inlet of the desulphurization device through a pipeline, and the flue gas outlet of the desulphurization device is connected to the chimney through a pipeline and an induced draft fan.
In the invention, the steam pipe of the waste heat boiler is connected with the steam spray pipe.
In the invention, the steam pipe of the waste heat boiler is also output and connected to a steam pipe network.
The invention relates to a double pyrolysis furnace for double pyrolysis incineration treatment of tar residue, which comprises the following process flows of tar residue treatment:
(1) the tar residue flow comprises the following steps:
and (3) conveying the tar residues into a tar residue preheating box through a pumping system, introducing low-pressure steam at the temperature of 130-150 ℃ into the tar residue preheating box, heating the tar residues to 150 ℃, and conveying the tar residues into the vertical double-pyrolysis dry distillation furnace through a quantitative feeding valve (a feeding sealing grid valve) when the tar residues have good fluidity. The core dry distillation module of the vertical double-pyrolysis dry distillation furnace is a conical box body, a flue gas heating cavity is arranged in the conical box body, the top of the conical box body is concave, tar residues are gathered at the concave part of the top and then overflow to the periphery, and the tar residues flow downwards uniformly on the surface of the box body and are heated, dry distilled and carbonized in the flow. The tar residue is heated to 400-500 ℃ in a low-temperature dry distillation section, water and tar in the tar residue are removed after dry distillation, and the working pressure is 0.1-0.3 MPa. And after the dry distillation is basically finished, the residual fixed carbon enters a high-temperature dry distillation section, the high-temperature dry distillation section is continuously heated to 600-900 ℃, the slag is carbonized into coke, and steam is introduced for activation to produce the active carbon.
(2) Flue gas flow:
the generated dry distillation gas and the water gas generated by activation are led out of the vertical double-pyrolysis dry distillation furnace to the combustion furnace during dry distillation, and the high-temperature flue gas generated by combustion is controlled at about 900 ℃ and enters the high-temperature dry distillation section of the vertical double-pyrolysis dry distillation furnace. The temperature of high-temperature flue gas from the high-temperature carbonization section is about 800 ℃, the high-temperature flue gas is mixed with the flue gas at the outlet of the waste heat boiler and is quenched to 500-550 ℃, and the high-temperature flue gas enters the carbonization low-temperature section. The temperature of the smoke at the outlet of the low-temperature dry distillation section is 400-450 ℃, low-pressure steam of 1.3MPA is generated through waste heat recovery of a waste heat boiler, and the low-pressure steam is used for producing active carbon through steam activation and is conveyed to a steam pipe network for other equipment. The temperature of the flue gas is reduced to 130 ℃, and the flue gas is discharged from a chimney after being desulfurized by a desulphurization device.
The invention has the beneficial effects that:
firstly, the double pyrolysis furnace for the double pyrolysis incineration treatment of the tar residue, disclosed by the invention, generates the dry distillation gas, the activated carbon and the steam by performing dry distillation, carbonization and activation on the tar residue, so that the harmless, recycling and reduction utilization of the tar residue are realized.
Secondly, according to the double pyrolysis furnaces for the double pyrolysis incineration treatment of the tar residues, disclosed by the invention, the core dry distillation module of each double pyrolysis furnace is a conical box body, the inside of each double pyrolysis furnace is provided with the smoke heating cavity, and the top of each double pyrolysis furnace is concave, so that the tar residues can overflow from the periphery after being gathered at the concave part of the top and can uniformly flow on the surface of the box body, and the double pyrolysis furnaces have the advantages of uniform and stable heating effect, and further the effect of carbonization by heating and dry distillation is improved.
Thirdly, the double pyrolysis furnace for the double pyrolysis incineration treatment of the tar residue, disclosed by the invention, carbonizes the tar residue by adopting a double pyrolysis principle, and generates activated carbon through steam activation, the heat source is high-temperature flue gas generated by burning generated pyrolysis gas, and the activated steam is steam generated by recovering surplus heat by utilizing a waste heat boiler, so that the utilization rate of energy and resources is high.
Drawings
FIG. 1 is a schematic structural view of a double pyrolysis furnace for double pyrolysis incineration treatment of tar residue according to the present invention;
FIG. 2 is a schematic view of the application of the double pyrolysis furnace in FIG. 1 in a tar residue double pyrolysis incineration disposal system.
In the figure: 1. the device comprises a furnace body shell, 2, a tar slag inlet, 3, an upper heating box body (a conical box body), 4, a lower heating box body, 5, a concave shape, 6, an annular heating cavity, 7, a low-temperature flue gas channel, 8, a high-temperature flue gas channel, 9, a cold flue gas inlet, 10, a flue gas output pipeline, 11, a dry distillation gas outlet, 12, an activation cavity, 13, a steam spray pipe, 14, an active carbon output port, 15, a tooth-shaped groove, 16, a tar slag preheating box, 17, a feeding sealing grid valve, 18, a paddle type cooler, 19, a pipeline, 20, a combustion furnace, 21, a waste heat boiler, 22, a low-temperature flue gas inlet of the waste heat boiler, 23, a cold flue gas outlet of the waste heat boiler, 24, an induced draft fan, 25, a desulfurization device, 26, a.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 2, an embodiment of a dual pyrolysis furnace for dual pyrolysis incineration treatment of tar residue according to the present invention includes a vertically disposed furnace body shell 1, a tar residue inlet 2 disposed at a central position of a top portion of the furnace body shell 1, an upper heating box 3 and a lower heating box 4 vertically disposed at a central position of an inner cavity of the furnace body shell 1 and connected adjacently up and down, wherein the upper heating box 3 is a conical box with a small upper end and a large lower end, a top portion of the conical box 3 is concave 5, an annular heating cavity 6 is disposed on the furnace body shell 1 at a position corresponding to the lower heating box 3, a low temperature flue gas channel 7 and a high temperature flue gas channel 8 are respectively disposed on a periphery of the furnace body shell 1, the low temperature flue gas channel 7 is communicated with the inner cavity of the upper heating box 3, the high temperature flue gas channel 8 is respectively communicated with the inner cavities of the annular heating cavity 6 and the lower heating box 4, the high temperature flue gas passageway 8 still with the cold flue gas entry 9 of low temperature flue gas passageway 7 is connected, the upper portion position of going up heating box 3 is provided with flue gas output pipeline 10, the top of furnace body shell 1 is provided with dry distillation gas outlet 11, the bottom of furnace body shell 1 is provided with one section activation chamber 12, activation chamber 12 in-connection has the steam spray tube 13 that is used for handling into the active carbon with the coke activation after the pyrolysis, the lower extreme of activation chamber 12 is provided with active carbon delivery outlet 14.
Preferably, a tooth-shaped groove 15 is formed in the concave part 5 of the top of the conical box body 3 to facilitate outflow of the tar residues, and a diversion trench 28 communicated with the tooth-shaped groove 15 is formed in the surface of an outer cone of the conical box body 3 to enable the tar residues to flow downwards in the diversion trench 28 and be heated and dry distilled.
Preferably, a tar residue preheating tank 16 is arranged above the furnace body shell 1, and a tar residue output port of the tar residue preheating tank 16 is connected with a tar residue inlet 2 at the top center position of the furnace body shell 1 through a pipeline and a feeding sealing grid valve 17.
Wherein the tar residue preheating tank 16 preheats the tar residue through a low-pressure steam heating pipe.
In this embodiment, a paddle type cooler 18 is disposed below the furnace body casing 1, and the activated carbon output port 14 outputs to the paddle type cooler 18 through a feed sealing format valve 17.
In this embodiment, a combustion furnace 20 is connected between the dry distillation gas outlet 11 at the top of the furnace body shell 1 and the high-temperature flue gas channel 8 through a pipeline.
In this embodiment, the flue gas output pipeline 10 of the upper heating box 3 is connected to the low-temperature flue gas inlet 22 of the waste heat boiler 21, and the cold flue gas outlet 23 of the waste heat boiler 21 is connected to the cold flue gas inlet 9 of the low-temperature flue gas channel 7 through a pipeline and an induced draft fan 24.
In this embodiment, the cold flue gas outlet 23 of the waste heat boiler 21 is also connected to the flue gas inlet of the desulphurization device 25 through a pipeline, and the flue gas outlet of the desulphurization device 25 is connected to the chimney through a pipeline and the induced draft fan 24.
In this embodiment, the steam pipe 27 of the exhaust-heat boiler 21 is connected to the steam nozzle 13.
In this embodiment, the steam pipe 27 of the exhaust-heat boiler 21 is also output and connected to the steam pipe network.
The process flow for treating the tar residue of the double pyrolysis furnace for the double pyrolysis incineration treatment of the tar residue of the embodiment is as follows:
(1) the tar residue flow comprises the following steps:
the tar residue is sent into a tar residue preheating box 16 through a pumping system, low-pressure steam with the temperature of 130-150 ℃ is introduced into the box, the tar residue is heated to 150 ℃, and the tar residue has good fluidity and is sent into the vertical double-pyrolysis dry distillation furnace through a quantitative feeding valve (a feeding sealing grid valve 17). The core dry distillation module of the vertical double pyrolytic dry distillation furnace is a conical box body 3, a flue gas heating cavity is arranged in the conical box body 3, the top of the conical box body 3 is concave 5, tar residues are gathered at the concave 5 at the top and then overflow to the periphery, and the tar residues flow downwards uniformly on the surface of the box body and are heated, dry distilled and carbonized in the flow. The tar residue is heated to 400-500 ℃ in a low-temperature dry distillation section, water and tar in the tar residue are removed after dry distillation, and the working pressure is 0.1-0.3 MPa. And after the dry distillation is basically finished, the residual fixed carbon enters a high-temperature dry distillation section, the high-temperature dry distillation section is continuously heated to 600-900 ℃, the slag is carbonized into coke, and steam is introduced for activation to produce the active carbon.
(2) Flue gas flow:
the generated dry distillation gas and the water gas generated by activation are led out of the vertical double-pyrolysis dry distillation furnace to the combustion furnace during dry distillation, and the high-temperature flue gas generated by combustion is controlled at about 900 ℃ and enters the high-temperature dry distillation section of the vertical double-pyrolysis dry distillation furnace. The temperature of high-temperature flue gas from the high-temperature carbonization section is about 800 ℃, the high-temperature flue gas is mixed with flue gas at the outlet of the waste heat boiler 21 and is quenched to 500-550 ℃, and the high-temperature flue gas enters the carbonization low-temperature section. The temperature of the flue gas at the outlet of the low-temperature dry distillation section is 400-450 ℃, low-pressure steam of 1.3MPA is generated by recovering the waste heat of the waste heat boiler 21 and is used for producing active carbon by steam activation and is conveyed to a steam pipe network for other equipment. The temperature of the flue gas is reduced to 130 ℃, and the flue gas is discharged from a chimney 26 after being desulfurized by a desulfurizer 25.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a two pyrolytic stoves that is used for two pyrolytic incineration disposal of tar sediment, its characterized in that, including erect the furnace body shell that sets up, set up the tar sediment entry of furnace body shell top central point position, erect the setting and put and be the last heating box and the lower heating box of upper and lower adjacent connection in furnace body shell inner chamber central point, it is little, the big toper box of lower extreme to go up the heating box, the top of toper box is the spill lie in on the furnace body shell the position that the lower heating box corresponds is provided with annular heating chamber the periphery of furnace body shell still is provided with low temperature flue gas passageway and high temperature flue gas passageway respectively, low temperature flue gas passageway with the inner chamber of last heating box is linked together, high temperature flue gas passageway respectively with the inner chamber of annular heating chamber and lower heating box is linked together, high temperature flue gas passageway still with the cold flue gas entry of low temperature flue gas passageway is connected, the upper portion position of going up the heating box is provided with flue gas output pipeline, the top of furnace body shell is provided with the dry distillation gas export, the bottom of furnace body shell is provided with one section activation chamber, the activation intracavity is connected with the steam spray tube that is used for being activated the charcoal after the pyrolysis into the active carbon, the lower extreme in activation chamber is provided with the active carbon delivery outlet.
2. The double pyrolysis furnace for the double pyrolysis incineration treatment of the tar residue according to claim 1, wherein a tooth-shaped groove is formed at a concave part of the top of the conical box body to facilitate the outflow of the tar residue, and a diversion trench communicated with the tooth-shaped groove is formed on the surface of an outer cone of the conical box body to realize the downward flowing of the tar residue in the diversion trench and the heated dry distillation.
3. The dual pyrolysis furnace for the dual pyrolysis incineration treatment of the tar residue according to claim 1, wherein a tar residue preheating tank is arranged above the furnace body shell, and a tar residue outlet of the tar residue preheating tank is connected with a tar residue inlet at the center of the top of the furnace body shell through a pipeline and a feeding sealing format valve.
4. The dual pyrolysis furnace for the dual pyrolysis incineration of the tar residue of claim 3, wherein the tar residue preheating tank preheats the tar residue through a low pressure steam heating pipe.
5. The dual pyrolysis furnace for the dual pyrolysis incineration disposal of the tar residue according to claim 1, wherein a paddle cooler is disposed below the furnace body shell, and the activated carbon output port is output to the paddle cooler through a feed seal format valve.
6. The double pyrolysis furnace for the double pyrolysis incineration disposal of the tar residue according to claim 1, wherein a combustion furnace is connected between the dry distillation gas outlet at the top of the furnace body shell and the high temperature flue gas channel through a pipeline.
7. The double pyrolysis furnace for the double pyrolysis incineration treatment of the tar residue according to claim 1, wherein a flue gas output pipeline of the upper heating box body is connected to a low-temperature flue gas inlet of a waste heat boiler, and a cold flue gas outlet of the waste heat boiler is connected to a cold flue gas inlet of the low-temperature flue gas channel through a pipeline and an induced draft fan.
8. The dual pyrolysis furnace for the dual pyrolysis incineration treatment of the tar residue according to claim 7, wherein the cold flue gas outlet of the waste heat boiler is further connected to a flue gas inlet of a desulfurization device through a pipeline, and the flue gas outlet of the desulfurization device is connected to a chimney through a pipeline and an induced draft fan.
9. The dual pyrolysis furnace for the dual pyrolysis incineration disposal of the tar residue of claim 1, wherein a steam pipe of the exhaust-heat boiler is connected with the steam spray pipe.
10. The dual pyrolysis furnace for the dual pyrolysis incineration of the tar residue of claim 1, wherein the steam pipe of the waste heat boiler is further connected to a steam pipe network in output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010625863.3A CN111909711B (en) | 2020-07-02 | 2020-07-02 | Double pyrolysis furnace for double pyrolysis incineration treatment of tar residues |
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| CN105713625A (en) * | 2015-12-21 | 2016-06-29 | 北京中科洁创能源技术有限公司 | Fixed-bed reaction device applicable to intermediate-temperature and low-temperature multi-atmosphere oriented coal pyrolysis |
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| CN206902070U (en) * | 2017-06-20 | 2018-01-19 | 广东绿能热力供应有限公司 | A kind of biomass internal heat type low temperature pyrogenation device |
| CN108977216A (en) * | 2018-09-20 | 2018-12-11 | 浙江布莱蒙农业科技股份有限公司 | A kind of retort waste heat recycles structure and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CH90649A (en) * | 1920-06-24 | 1921-09-16 | Carbozit A G | Process for the fractional distillation of low-value fuels. |
| GB299485A (en) * | 1927-05-28 | 1928-10-29 | Harald Nielsen | Improvements in or relating to the manufacture of water gas |
| SU403712A1 (en) * | 1971-04-27 | 1973-10-26 | METHOD FOR HEATING CARBON MATERIALS | |
| CN101407724A (en) * | 2008-10-27 | 2009-04-15 | 合肥天焱绿色能源开发有限公司 | Vertical combined gasification furnace for solid biomass |
| CN201560172U (en) * | 2009-10-22 | 2010-08-25 | 陕西冶金设计研究院有限公司 | Internal heating type upright carbonizing furnace |
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| CN111909711B (en) | 2021-05-14 |
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