Note: Descriptions are shown in the official language in which they were submitted.
CA 03047860 2019-06-20
PO19015921
Coal Pyrolysis Process Device
Technical Field
[0001] The present disclosure relates to the technical field of heat exchange,
and in particular to a coal pyrolysis process device.
Background Art
[0002] Depending on different requirements of final products, coal pyrolysis
apparatuses are greatly different from one another, and also have greatly
different coal tar yields, for example, a coke furnace for making coke and a
semi-coke furnace for producing semi-coke have a great difference in furnace
type. The coke furnace produces coke with a relatively low amount of volatile
matter, has low coal tar yield, but produces a large amount of coal gas,
whereas the semi-coke furnace produces semi-coke with a higher amount of
volatile matter, has relatively high coal tar yield, and produces a slightly
lower
amount of coal gas. With the demand of petroleum strategy, a rotary kiln for
coalite tar with high oil yield has become a new favorite in recent years. A
Chinese Patent with application number 201010262786.6 and publication
number 0N101985558, entitled ''Coal Decomposing Equipment", discloses a
coal decomposing equipment including an airtight kiln body with an coal inlet
and an coal outlet, wherein a flame gas pipeline heating facility is set in
the kiln
body and a channel for impelling and decomposing coal is formed between the
flame gas pipeline heating facility and an inner wall of the kiln body; and a
coal
decomposition gas collecting pipe is provided on the kiln body to communicate
with the channel for impelling and decomposing coal. Since this invention
allows a large amount of heat produced by the flame gas pipeline heating
facility to be conducted and radiated to the pulverized coal in the channel
for
impelling and decomposing coal, the pulverized coal fully absorbs the heat so
as to be heated and decomposed to the fuel gas, tar gas and coal with a higher
heat-value in the channel for impelling and decomposing coal. The fuel gas
and tar gas communicate with a gas dedust and liquefaction facility outside of
the rotary kiln through the coal decomposition gas collecting pipe, and the
decomposed fuel gas and tar gas are dedusted, separated, and pressure
liquefied.
[0003] The above-mentioned patent indeed provides relatively high oil yield,
and is regarded as an example, but only the maximum tar yield is taken into
consideration in this patent, and a relatively large amount of volatile matter
in
the upgraded coal resulting from such pyrolysis at low temperature and the
coal gas amount required by hydrogenation of tar are not taken into
consideration. The above-mentioned patent has its limitations in that it
either
provides a high coal tar yield but low coal gas amount, or provides a high gas
yield but low coal tar yield, but cannot satisfy both requirements.
P019015921
Summary
[0004] In view of this, an object of the present disclosure is to provide a
coal
pyrolysis process device in response to the disadvantages of the prior art,
which
can achieve high-efficient production of both gas and coal tar.
[0005] In order to solve the above technical problem, the following technical
solution is adopted in the present disclosure: a coal pyrolysis process
device,
comprising a primary coal pyrolysis device and a secondary coal pyrolysis
device,
wherein the primary coal pyrolysis device is a coal decomposition apparatus
which
is in form of a rotary kiln radiant tube and of heating type, and the primary
coal
pyrolysis device comprises a primary feed port, a primary discharge port, a
primary
coal gas outlet, and a heating mechanism in form of a primary radiant tube;
the secondary coal pyrolysis device comprises a secondary feed port, a
secondary discharge port, a secondary coal gas outlet, and a secondary heating
mechanism;
the primary discharge port communicates with the secondary feed port, coal tar
is
maximally extracted from coal in the primary coal pyrolysis device and then
the coal
is introduced into the secondary coal pyrolysis device, and the coal continues
to be
heated up and pyrolyzed at an upper portion of the secondary coal pyrolysis
device,
so that volatile matter of the upgraded coal upgraded by the primary pyrolysis
is
further reduced in the secondary coal pyrolysis device, and more coal gas is
produced.
[0005-a]
Another embodiment of the invention relates to a coal pyrolysis
process device, comprising a primary coal pyrolysis device and a secondary
coal
pyrolysis device, wherein the primary coal pyrolysis device is a heating coal
decomposition apparatus which is in form of a rotary kiln radiant tube;
the primary coal pyrolysis device comprises a primary feed port, a primary
discharge port, a primary coal gas outlet, and a heating mechanism in form of
a
primary radiant tube;
2
Date Recue/Date Received 2020-10-29
the secondary coal pyrolysis device comprises a secondary feed port, a
secondary discharge port, a secondary coal gas outlet, and a secondary heating
mechanism;
the primary discharge port communicates with the secondary feed port, coal tar
is maximally extracted from coal in the primary coal pyrolysis device and then
the
coal is introduced into the secondary coal pyrolysis device, and the coal
continues
to be heated up and pyrolyzed at an upper portion of the secondary coal
pyrolysis
device, so that volatile matter of upgraded coal upgraded by a primary
pyrolysis is
further reduced in the secondary coal pyrolysis device, and more coal gas is
produced; and
the secondary feed port is located at one end of the secondary coal pyrolysis
device connected with the primary discharge port, and the secondary coal gas
outlet
is located at the other end of the secondary coal pyrolysis device opposite to
the
one end of the secondary coal pyrolysis device connected with the primary
discharge port.
[0006] The secondary coal pyrolysis device is a heating coal decomposition
apparatus which is in form of a rotary kiln radiant tube or a shaft kiln heat
exchange
coal decomposition apparatus.
[0007] The coal pyrolysis process device further comprises a coal drying
device
disposed upstream of the primary coal pyrolysis device, and the dried coal is
introduced into the primary coal pyrolysis device.
[0008] The coal pyrolysis process device further comprises a deduster disposed
at the primary coal gas outlet and a deduster disposed at the secondary coal
gas
outlet, and the deduster is a cyclone deduster or gravity deduster or a high
temperature membrane filter having a filter element coated with a membrane at
its
surface.
[0009] Output of the primary coal gas outlet and output of the secondary coal
gas
outlet are mixed together and enter the high temperature membrane filter.
2a
Date Recue/Date Received 2020-10-29
[0010] Output of the primary coal gas outlet and Output of the secondary coal
gas
outlet are mixed together, and firstly pass through the cyclone deduster or
gravity
deduster and then enter the high temperature membrane filter.
2b
Date Recue/Date Received 2020-10-29
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[0011] The primary coal gas outlet leads to a first membrane filter, and the
secondary coal gas outlet leads to a second membrane filter.
[0012] Output of the primary coal gas outlet passes through a first cyclone
deduster or gravity deduster and then enters a first membrane filter, and
output
of the secondary coal gas outlet passes through a second cyclone deduster or
gravity deduster and enters a second membrane filter..
[0013] The present disclosure has the advantage that when coal is placed in
the primary coal pyrolysis device, the tar yield reaches the maximum value,
and the primary upgraded coal which still has a relatively high amount of
volatile matter is introduced into the secondary coal pyrolysis device in a
hot
state and continues to be heated up and pyrolyzed, such that upgraded coal
with a lower amount of volatile matter is produced, and at the same time more
coal gas is additionally produced. The coal gas produced by secondary
pyrolysis contains more amount of CO and H2, and CO can be converted into
H2 via coal gas, such that sufficient H2 source can be provided for
hydrogenation of coal tar, and the cost of hydrogenation of coal tar is
effectively reduced.
[0014] The drying device is added to contribute to reduction of energy
consumption in coal pyrolysis; and the filter is added in order to filter out
and
remove dust from coal gas containing dust and containing tar before
separation of oil and gas to ensure the cleanliness of oil and gas so as to
establish a good foundation for subsequent treatments of oil and gas.
Brief Description of Drawings
[0015] FIG. 1 is a schematic structural view of a first embodiment of the
present disclosure;
FIG. 2 is a schematic structural view of a second embodiment of the present
disclosure;
FIG. 3 is a schematic structural view of a third embodiment of the present
disclosure; and
FIG. 4 is a schematic structural view of a fourth embodiment of the present
disclosure.
Detailed Description of Embodiments
[0016] In order to make the objects, technical solutions and advantages of
the embodiments of the present disclosure clearer, the technical solutions of
the embodiments of the present disclosure will be described below clearly and
completely with reference to FIGS. 1-4 of the embodiments of the present
disclosure. It is apparent that the embodiments to be described are some, but
not all of the embodiments of the present disclosure. All the other
embodiments obtained by those of ordinary skill in the art in light of the
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described embodiments of the present disclosure will fall within the scope of
the present disclosure as claimed.
[0017] First Embodiment: As shown in FIG. 1, a coal pyrolysis process
device comprises a primary coal pyrolysis device 1 and a secondary coal
pyrolysis device 2, wherein the primary coal pyrolysis device 1 is a coal
decomposition apparatus which is in form of a rotary kiln radiant tube and of
heating type, and the primary coal pyrolysis device 1 comprises a primary feed
port 11, a primary discharge port 12, a primary coal gas outlet 13, and a
heating mechanism in form of a primary radiant tube 14;
the secondary coal pyrolysis device 2 comprises a secondary feed port 21, a
secondary discharge port 22, a secondary coal gas outlet 23, and a secondary
heating mechanism 24;
the primary discharge port 12 communicates with the secondary feed port
21, coal tar is maximally extracted from coal in the primary coal pyrolysis
device 1 and then the coal is introduced into the secondary coal pyrolysis
device 2, and the coal continues to be heated up and pyrolyzed at an upper
portion of the secondary coal pyrolysis device 2, so that volatile matter of
the
upgraded coal upgraded by the primary pyrolysis is further reduced in the
secondary coal pyrolysis device 2, and more coal gas is produced.
[0018] The secondary coal pyrolysis device 2 is a coal decomposition
apparatus which is in form of a rotary kiln radiant tube and of heating type.
[0019] The coal pyrolysis process device further comprises a coal drying
device 3 disposed upstream of the primary coal pyrolysis device 1, and the
dried coal is introduced into the primary coal pyrolysis device 1.
[0020] The primary coal gas outlet and the secondary coal gas outlet lead to
a high temperature membrane filter 5.
[0021] Second Embodiment: As shown in FIG. 2, a coal pyrolysis process
device comprises a primary coal pyrolysis device 1 and a secondary coal
pyrolysis device 2, wherein the primary coal pyrolysis device 1 is a coal
decomposition apparatus which is in form of a rotary kiln radiant tube and of
heating type, and the primary coal pyrolysis device 1 comprises a primary feed
port 11, a primary discharge port 12, a primary coal gas outlet 13, and a
heating mechanism in form of a primary radiant tube 14;
the secondary coal pyrolysis device 2 comprises a secondary feed port 21, a
secondary discharge port 22, a secondary coal gas outlet 23, and a secondary
heating mechanism 24;
the primary discharge port 12 communicates with the secondary feed port
21, coal tar is maximally extracted from coal in the primary coal pyrolysis
device 1 and then the coal is introduced into the secondary coal pyrolysis
device 2, and the coal continues to be heated up and pyrolyzed at an upper
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portion of the secondary coal pyrolysis device 2, so that volatile matter of
the
upgraded coal upgraded by the primary pyrolysis is further reduced in the
secondary coal pyrolysis device 2, and more coal gas is produced.
[0022] The secondary coal pyrolysis device 2 is a coal decomposition
apparatus which is in form of a rotary kiln radiant tube and of heating type.
[0023] The coal pyrolysis process device further comprises a coal drying
device 3 disposed upstream of the primary coal pyrolysis device 1, and the
dried coal is introduced into the primary coal pyrolysis device 1.
[0024] The primary coal gas outlet 13 and the secondary coal gas outlet 23
converge through a cyclone deduster or gravity deduster 4 and then into the
high temperature membrane filter 5.
[0025] Third Embodiment: As shown in FIG. 3, a coal pyrolysis process
device comprises a primary coal pyrolysis device 1 and a secondary coal
pyrolysis device 2, wherein the primary coal pyrolysis device 1 is a coal
decomposition apparatus which is in form of a rotary kiln radiant tube and of
heating type, and the primary coal pyrolysis device 1 comprises a primary feed
port 11, a primary discharge port 12, a primary coal gas outlet 13, and a
heating mechanism in form of a primary radiant tube 14;
the secondary coal pyrolysis device 2 comprises a secondary feed port 21, a
secondary discharge port 22, a secondary coal gas outlet 23, and a secondary
heating mechanism 24;
the primary discharge port 12 communicates with the secondary feed port
21, coal tar is maximally extracted from coal in the primary coal pyrolysis
device 1 and then the coal is introduced into the secondary coal pyrolysis
device 2, and the coal continues to be heated up and pyrolyzed at an upper
portion of the secondary coal pyrolysis device 2, so that volatile matter of
the
upgraded coal upgraded by the primary pyrolysis is further reduced in the
secondary coal pyrolysis device 2, and more coal gas is produced.
[0026] The secondary coal pyrolysis device 2 is a coal decomposition
apparatus of a shaft kiln heat exchange type.
[0027] The coal pyrolysis process device further comprises a coal drying
device 3 disposed upstream of the primary coal pyrolysis device 1, and the
dried coal is introduced into the primary coal pyrolysis device 1.
[0028] The primary coal gas outlet 13 leads to a first membrane filter 51, and
the secondary coal gas outlet 23 leads to a second membrane filter 52.
[0029] Fourth Embodiment: As shown in FIG. 4, a coal pyrolysis process
device comprises a primary coal pyrolysis device 1 and a secondary coal
pyrolysis device 2, wherein the primary coal pyrolysis device 1 is a coal
decomposition apparatus which is in form of a rotary kiln radiant tube and of
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heating type, and the primary coal pyrolysis device 1 comprises a primary feed
port 11, a primary discharge port 12, a primary coal gas outlet 13, and a
heating mechanism in form of a primary radiant tube 14;
the secondary coal pyrolysis device 2 comprises a secondary feed port 21, a
secondary discharge port 22, a secondary coal gas outlet 23, and a secondary
heating mechanism 24;
the primary discharge port 12 communicates with the secondary feed port
21, coal tar is maximally extracted from coal in the primary coal pyrolysis
device 1 and then the coal is introduced into the secondary coal pyrolysis
device 2, and the coal continues to be heated up and pyrolyzed at an upper
portion of the secondary coal pyrolysis device 2, so that volatile matter of
the
upgraded coal upgraded by the primary pyrolysis is further reduced in the
secondary coal pyrolysis device 2, and more coal gas is produced.
[0030] The secondary coal pyrolysis device 2 is a coal decomposition
apparatus of a shaft kiln heat exchange type.
[0031] The coal pyrolysis process device further comprises a coal drying
device 3 disposed upstream of the primary coal pyrolysis device 1, and the
dried coal is introduced into the primary coal pyrolysis device 1.
[0032] The primary coal gas outlet 13 leads to a first membrane filter 51, and
the secondary coal gas outlet 23 leads to a second membrane filter 52.
[0033] Output of the primary coal gas outlet 13 passes through a first
cyclone deduster or gravity deduster 41 and then enters a first membrane
filter
51, and output of the secondary coal gas outlet 23 passes through a second
cyclone deduster or gravity deduster 42 and enters a second membrane filter
52..
[0034] The above description is illustrative of preferred embodiments of the
present disclosure, and it should be noted that several improvements and
modifications can be made by those of ordinary skill in the art without
departing
from the principles described in the present disclosure, and these
improvements and modifications should also be considered to fall within the
scope of protection of the present disclosure.
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