WO2012169711A1

WO2012169711A1 - Low-grade-coal coal gas production system

Info

Publication number: WO2012169711A1
Application number: PCT/KR2011/009949
Authority: WO
Inventors: 최영찬; 홍재창; 이동욱; 라호원
Original assignee: 한국에너지기술연구원
Priority date: 2011-06-09
Filing date: 2011-12-21
Publication date: 2012-12-13

Abstract

The present invention relates to a low-grade-coal coal gas production system whereby it is possible to produce a coal gas of which the main component is syngas (H₂ and CO). To this end, the present invention comprises: a supply unit (1) for guiding and forwarding low-grade coal that has been introduced into a hopper (11); a rotary kiln furnace (2) which has a rotating main body (21), and which rotates the main body (21) and subjects the low-grade coal, that has been introduced via the supply unit (1) into the main body (21), to thermal decomposition so as to discharge same in the form of syngas and char; a first separating unit (3) which is connected to the rotating kiln furnace (2), and which recovers the char by allowing the char to flow into a char eliminating means (33) under the weight of the char itself and induces the syngas alone to emerge; a second separating unit (4) which is connected to the first separating unit (3), and which traps any tar contained in the syngas via a cooling scrubber and recovers same by means of a tar eliminating means (42) and induces high-purity syngas alone to emerge; and a holding tank (5) which is connected to the second separating unit (4) and holds the high-purity syngas. The syngas stored in the holding tank (5) can be directly used as a raw material for electricity generation and for producing synthetic oil, DME, methanol and high-purity hydrogen.

Description

Low Coal Coal Gas Production System

The present invention relates to a low coal coal gas production system capable of producing coal gas mainly composed of syngas (H ₂ and CO) by using a low-cost rotary kiln, and more specifically, a low coal containing moisture. By converting the interior of the rotary kiln into a steam atmosphere by using the water contained in the lower coal, the methane component of coal gas generated during pyrolysis is reduced and the components of syngas (H ₂ and CO) are increased. The present invention relates to a low coal coal gas production system configured to produce synthetic oil, DME, methanol, and syngas capable of obtaining electricity through various post-treatment processes.

As developing countries industrialize, the consumption of crude oil increases, and technology for producing liquefied fuel from coal, which is widely buried around the world, is emerging.

However, about 80% of the coal is made up of low-grade coal containing ash and moisture, and about 20% is made up of high-quality coal with no moisture and high carbon content. High-grade coal is mainly used.

Low-grade coal containing 5% or more of water is dried to remove water as much as possible, and then put into a low-cost devolatilizer to pyrolyze in a dry atmosphere without moisture to process coal gas, which is mainly composed of methane gas with high calorific value. It was used as its source of heat energy.

In addition, by-products generated during pyrolysis of lower coal include char and tar, which are composed of carbon components containing ash, which is used as a fuel for direct heating, or used to prepare activated carbon through a post-treatment process. However, when the genre is exposed to air in a high temperature atmosphere, a combustion reaction occurs, which causes a problem of decreasing the genre output by about 30%.

In addition, high-grade coal was produced as a synthesis gas (H ₂ and CO) through a coal gasification process, such synthesis gas is a post-treatment reaction methanol synthesis process (synthetic fiber, chemical products) or FT synthesis process (synthetic oil) or DME Various synthetic fuels were produced through synthesis process (diesel alternative fuel) or hydrogen purification process (fuel cell).

However, the device used in the coal gasification process of high-grade coal is to produce synthetic gas by incomplete combustion of only volatile matter and carbon contained in coal, because the device design is very complicated and manufactured in large size because it is composed of gasifier of high temperature / high pressure. There is a problem in that the facility cost is high, and the operating cost is high due to the high temperature / high pressure operating conditions.

The present invention has been made in view of the above problems, and a first object of the present invention is to provide a low-coal coal gas production system capable of producing syngas (H ₂ and CO) using a low-cost rotary kiln. It is.

The second object of the present invention is a methane component of the coal gas generated by pyrolysis by converting the interior of the rotary kiln into a steam atmosphere by using low-grade coal containing water as a raw material and using moisture contained in the low-grade coal. It is to provide a low coal coal gas production system configured to reduce the production cost and increase the components of H ₂ and CO to produce synthetic petroleum, DME, methanol and syngas capable of obtaining electricity through post-treatment processes.

A third object of the present invention is to provide a low-coal coal gas production system having a structure that can be used as another energy source by increasing the production yield of the by-product genre.

The present invention according to a feature of the present invention for achieving the above object, the first invention relates to a low-coal coal gas production system capable of producing coal gas, the main component of the synthesis gas (H ₂ and CO), Supply unit (1) for guiding and transporting the lower coal injected into the hopper (11); and a main body 21 that rotates, the main body 21 by rotating the main body 21 through the supply unit (1) A rotary kiln (2) for pyrolyzing the lower coal introduced into the reactor and discharged in the form of synthetic gas and char; and the magnetic kiln connected to the rotary kiln (2) to flow into the char removal means (33). A first separation unit 3 which recovers the waste gas and induces only the synthesis gas; and a tar that is connected to the first separation unit 3 and included in the synthesis gas through a cooling scrubber to remove tar. 42) and the second to induce and discharge only the high-purity syngas Separator 4; And a storage tank 5 connected to the second separator 4 to store high purity syngas, wherein the syngas stored in the storage tank 5 is synthetic oil, DME, methanol It is characterized in that it can be used directly as a raw material for producing high purity hydrogen and power generation.

The second invention, in the first invention, the low-carbon coal is a water content of 5 to 40% by weight to minimize the production of methane gas by forming the interior of the rotary kiln 2 in a steam atmosphere It is preferable.

According to a third invention, in the first invention, the first separation unit 3 is connected to the discharge side of the rotary kiln 2 so that the genre is inclined downward so as to be guided by the magnetic removal means 33 by its own weight. It is preferably configured to include a first conduit 31 and a second conduit 32 in communication with the first conduit 31 to induce and send only the synthesis gas to the upper portion.

The fourth invention, in the third invention, the genre removal means 33 is a storage tank 331 is installed at the connection point of the first conduit 31 and the second conduit 32, and the storage tank 331 A cooling jacket 332 external to the outer circumferential surface of the storage tank 331 to cool the storage tank 331, and a cooling pipe 333 to directly cool the inflowing genre disposed in a zigzag form in the storage tank 331; A first gate valve 334 installed at an upper portion of the storage tank 331 to regulate the inflow of the genre and a second gate valve 335 provided at a lower portion of the storage tank 331 to control the discharge of the genre; In order to increase the acquisition yield of the genre, the genre may be configured to be discharged through the second gate valve 335 and then the nitrogen line 336 for removing the introduced oxygen.

The fifth invention, in the first invention, the second separation unit 4 is a third conduit 41 of the "U" shape and tar removal means 42 connected to the center of the third conduit 41 The cooling scrubber is preferably composed of a nozzle pipe body 411 which is installed inside the inlet of the third pipe passage 41 and the inside of the discharge to scatter water.

The sixth invention, in the fifth invention, the tar removing means 42 is a storage tank 421 for storing water in which tar is collected, and a valve 422 formed at the inlet and the outlet of the storage tank 421. It is preferable that it consists of.

In the seventh invention, in the first invention, the rotary kiln 2 is a hermetic type for blocking the inflow of oxygen so as to prevent combustion of lower coal, and is preferably a main body heating method.

In the eighth invention, in any one of the first, second or seventh invention, the operating temperature of the rotary kiln 2 is preferably in the range of 400 ° C to 900 ° C.

In a ninth invention, in the first invention, the rotary kiln furnace (2) is rotatably connected to the chamber (6) via a seal means (7) coupled to both sides of the body (21), and each of the chambers (6) ) Is preferably connected to the supply unit 1 and the first separation unit (3).

10th invention, in the ninth invention, the sealing means 7 is inserted into the air-cooled jacket 72 and the air-cooled jacket 20 is coupled to the outer peripheral surface of both sides of the main body 21 of the rotary kiln (2) The cooling jacket 72 is formed on one surface of the chamber 6 so as to be able to seal the seal between the main body 21 and the chamber 6, and the water-cooled jacket 71 to prevent thermal deformation. It is preferably configured to include a connection portion 73 is coupled between the air-cooled jacket 72.

In the eleventh invention, in the tenth invention, the air-cooled jacket 72 preferably further includes a plurality of through holes 721 at one end such that external air communicates with the inside.

In the twelfth invention, in the tenth invention, the connecting portion 73 has a cross section that is seated on the inner circumferential surface of the water-cooled jacket 71.

"Shaped support flange 731, the grand packing 74 is fitted to the outer circumferential surface of the air-cooled jacket 72 and in close contact with the inside of the support flange 731, the support flange 731 and the air-cooled jacket ( 72, so that the cross section is inserted into the support flange 731 so as to press and seal the grand packing 74.

It is preferably composed of a pressing flange 732 of the "shape".

The present invention, unlike the devolatilization furnace using a conventional low-carbon coal containing methane as a main component, by developing a low-coal coal gas production system capable of producing coal gas mainly composed of syngas (H ₂ and CO), It is expected to be applicable to various gasification-based applications, and high-grade coal gasifiers are expensive in construction and operate at high temperature and high pressure.However, synthesis gas can be extracted from rotary kiln furnace which is relatively inexpensive and operated at low temperature and atmospheric pressure. Methanol synthesis process (synthetic fiber, chemical products) or FT synthesis process (synthetic oil) or DME synthesis process (diesel alternative fuel) or hydrogen purification process (fuel cell) When applied to the application field, it can be expected to reduce CO ₂ emissions, improve efficiency, and improve economic efficiency.

In addition, it is possible to increase the yield of production of by-product char, which is a by-product generated when pyrolysis of lower coal has an effect that can be used as another energy source.

In addition, the present invention by cooling the grand packing in a rotary kiln operating at 600 ℃ or more, not only can the life of the grand packing be improved to more than a year, but also the convenience of maintenance and low cost of the grant packing Has the effect of.

1 is a configuration diagram of a low coal coal gas production system according to the present invention,

FIG. 2 is a partial perspective view of a rotary kiln furnace rotatably connected to a chamber via a sealing means which extracts part A of FIG. 1;

3 is an exploded perspective view of FIG. 2;

4 is a cross-sectional view of FIG.

5 and 6 is an operation of the first separator extracted from FIG.

7 is an operation diagram of the second separator extracted from FIG.

According to the present invention, the lower coal containing water is used as a raw material, and the inside of the rotary kiln is converted to a steam atmosphere by using the moisture contained in the lower coal, thereby reducing the methane component of the coal gas produced during pyrolysis and syngas. It is a low coal coal gas production system configured to increase the composition of (H ₂ and CO) to produce synthetic oil, DME, methanol, syngas that can obtain electricity through various post-treatment processes.

The low coal coal gas production system is composed of five parts, which is a supply part 1, a rotary kiln 2, a first separation part 3, a second separation part 4 and a storage tank. It consists of (5).

First, the water content of the lower coal used in the present invention is in the range of 5% by weight to 40%, which is for producing syngas using a low cost rotary kiln furnace (2).

The moisture content of the lower coal described above is to minimize the generation of methane gas by forming the interior of the rotary kiln 2 in a steam atmosphere, and when the steam atmosphere is used, steam reforming reaction of methane (CH ₄ + 2H ₂ O-> 3H ₂ + CO ₂ ), the concentration of methane decreases and the concentration of hydrogen increases. In addition, the carbon dioxide reforming reaction of methane (CH ₄ + CO _2- > 2H ₂ + 2CO ), Or a water gas shift reaction (CO + H ₂ O-> H ₂ + CO ₂ ), and the total gas composition can be produced by coal gas composed mainly of syngas (H ₂ and CO). Because it can.

Therefore, when the moisture content is less than 5% by weight, the production of methane gas may increase, which is not preferable, and when the water content is 40% by weight or more, it is not preferable because the supply of coal 1 may not be smooth. not.

In addition, the supply unit 1 may be provided with a transfer screw 12 so as to transfer the low-carbon coal introduced through the hopper 11 by a predetermined amount into the rotary kiln (2).

The rotary kiln 2 is configured to be supplied with a low-grade coal through the supply unit 1, and has a main body 21 to rotate, by rotating the main body 21 in the main body 21 It thermally decomposes the injected low-grade coal into a syngas and char form.

The rotary kiln 2 may be configured to adjust the installation angle within the range of 0.5 ° to 20 °, which can be determined by the operating temperature and residence time of the low-grade coal.

In addition, the residence time of the lower coal is preferably set in the range of 30 minutes to 200 minutes, since less than 30 minutes may not be supplied with sufficient heat in the thermal decomposition of the lower coal, the yield of the synthesis gas can be reduced, If it is 200 minutes or more, the concentration of volatile components remaining in the pyrolyzed syngas and by-product char is too low, which is not preferable because the combustion characteristics may be deteriorated.

In addition, the operating temperature of the rotary kiln 2 ranges from 400 ° C. to 900 ° C., which means that pyrolysis of low-grade coal is difficult to occur when the operating temperature is less than 400 ° C., and the coal gas obtained compared to the thermal energy supplied when the temperature is higher than 900 ° C. It is not preferable because the yield of is not large.

Meanwhile, the rotary kiln 2 has an outer cylinder 22 mounted on an outer circumferential surface of the main body 21, and the outer cylinder 22 is provided with a plurality of heating means 23 to heat the outside of the main body 21. It may be configured as. This is not preferable in the case of the internal heating method because oxygen must be supplied to oxidize the coal gas pyrolyzed in the rotary kiln 2 so that the yield of coal gas can be reduced.

In addition, the rotary kiln 2 is of course composed of a sealed type for blocking the inflow of oxygen to prevent the combustion of low-grade coal.

In addition, the first separation unit 3 is connected to the rotary kiln (2) to recover the inlet into the inside of the purge removal means 33 by the weight of the purulent and functions to induce and discharge only the synthesis gas.

The first separation unit 3 is connected to the discharge side of the rotary kiln 2, the first pipe 31 is installed to be inclined downward so as to be guided by the weight removal means 33 by the magnetic weight, and the It is composed of a second conduit 32 in communication with the first conduit 31 to induce and send only the synthesis gas to the upper portion.

Here, the genre removing means 33 is installed at the connection point of the first pipe 31 and the second pipe 32 to be configured to collect the genre by its own weight, and also to cool the genre when discharged to the outside It is configured to prevent external oxygen from flowing into the first separation unit 3 and the char removal means 33.

To this end, the removal means 33 is stored in the storage tank 331, the outer circumferential surface of the storage tank 331, a cooling jacket 332 for cooling the storage tank 331 itself, and the storage tank ( A cooling pipe 333 disposed in a zigzag shape to directly cool the genre flowing into the storage tank, and a first gate valve installed on the storage tank 331 to control the inflow of the genre. 334) and a second gate valve 335 installed at the lower part to control the discharge of the genre, and to remove the oxygen introduced after the genre is discharged through the second gate valve 335 to increase the yield of the genre. It consists of a nitrogen line 336 to.

That is, the purge removal means 33 cools the genre introduced into the storage tank 331 through the cooling jacket 332 and the cooling pipe 333 and contacts the external oxygen due to high heat when discharged to the outside. To prevent combustion, and when the second gate valve 335 is opened to discharge the cooled genre, external oxygen introduced into the storage tank 331 is discharged to the outside through the nitrogen line 336. It is configured to prevent the combustion of the genre by oxygen flowing into the storage tank 331 to increase the amount of genre production.

On the other hand, the second separator 4 is connected to the first separator 3 and collected through tar cooling scrubber contained in the synthesis gas to recover the tar removal means 42 and induces only high purity synthetic gas. To function.

The second separation unit 4 is composed of a third conduit 41 of the "U" shape, tar removal means 42 connected to the center of the third conduit 41, the cooling scrubber is the first It consists of the nozzle pipe | tube 411 which is provided in the inflow inside of the three pipe | tube 41, and the discharge inside, and can scatter water.

The tar removing means 42 is composed of a storage tank 421 for storing water in which tar is collected, and a valve 422 formed at the inlet and the outlet of the storage tank 421.

In addition, the storage tank (5) is connected to the second separation unit (4) to function to store the tar removed synthetic gas, the stored synthetic gas is a methanol synthesis process (synthetic fiber, chemical) or a post-treatment process or It is used as raw material of various synthetic fuel manufacturing through FT synthesis process (synthetic oil) or DME synthesis process (diesel alternative fuel) or hydrogen purification process (fuel cell).

In addition, the syngas may optionally be directly used as a fuel for power generation.

Hereinafter, the connection relationship between the rotary kiln will be briefly described together with the accompanying drawings.

FIG. 2 is a partial perspective view of a rotary kiln rotatably connected to a chamber via a sealing means extracting part A of FIG. 1, FIG. 3 is an exploded perspective view of FIG. 2, and FIG. 4 is a cross-sectional view of FIG. 2. .

First, as shown in FIG. 1, the rotary kiln 2 is rotatably connected to the chamber 6 via a sealing means 7 coupled to both sides of the main body 21. In this case, each of the chambers 6 is connected to the supply unit 1 and the first separation unit 3.

Here, the inclined guide plate 61 for guiding the lower coal to the main body 21 of the rotary kiln 2 is built in the chamber 6 connected to the supply unit 1 (shown in FIG. 1).

Here, the sealing means 7 is an air-cooled jacket 72 coupled to both outer peripheral surfaces of the main body 21 of the rotary kiln 2, as shown in Figures 2 to 4, and the air-cooled jacket 72 of the body The water-cooled jacket 71 formed on one surface of the chamber 6 so as to be guided and inserted into the chamber 6 is sealed between the main body 21 and the chamber 6, and the water-cooled jacket to prevent thermal deformation. It comprises a connection portion 73 is coupled between the 71 and the air-cooled jacket (72).

This configuration is a structure in which the connection portion 73 interposed between the air-cooled jacket 72 and the water-cooled jacket 71 is cooled in real time to prevent thermal deformation and extend the life.

The air-cooled jacket 72 is a structure in which a plurality of through-holes 721 are formed at one end surface so that external air communicates with the inside. At this time, the through hole 721 is formed in a circular arc on one end surface of the air-cooled jacket 72 is a structure that allows the cold air of the outside to radiate heat as it naturally diffused and convection as the air-cooled jacket 72 rotates to be.

The water-cooled jacket 71 has a relatively larger diameter than the air-cooled jacket 72 so that the air-cooled jacket 72 can be inserted into the air-cooled jacket 72. This is to form a gap G so that the connection portion 73 can be interposed between the water-cooled jacket 71 and the air-cooled jacket 72.

In addition, the connection portion 73 is to seal the main body 21 is rotated between the air cooling jacket 72 and the water-cooled jacket 71 to the chamber 6, the support flange 731, the gland It consists of a packing 74 and a pressing flange 732.

Here, the support flange 731 has a cross section so as to be seated on the inner circumferential surface of the water-cooled jacket 71.

Take shape.

In addition, the water-cooled jacket 71 further includes a step 711 on the inner circumferential surface of the support flange 731.

The structure of the water-cooled jacket 71 and the support flange 731 is to be seated on the inner circumferential surface of the water-cooled jacket 71 while wrapping the other end of the support flange 731 so as not to be in close contact with the outer peripheral surface of the rotary kiln main body 21. It is the structure that made it possible.

In addition, the grand packing 74 is a "ring" shape, it is coupled to the outer peripheral surface of the air-cooled jacket (72). This structure is a structure in which the surface is installed at a distance from the main body 21 of the hot rotary kiln 2 so that heat transfer can be reduced.

The grand packing 74 is in close contact with the inside of the support flange 731 seated on the step 711 of the water-cooled jacket 71 when the air-cooled jacket 72 is inserted into the inner peripheral surface of the water-cooled jacket (71).

In addition, the pressing flange 732 is inserted between the support flange 731 and the air-cooled jacket 72 is pressed in the cross-section so as to press and seal the grand packing 74 in close contact with the support flange 731.

Take shape.

That is, the pressing flange 732 is a circular pressing frame 732a extending in the axial direction of the rotary kiln 2 is inserted between the support flange 731 and the air-cooled jacket 72, the grand packing 74 And the other end of the support flange 731 seated on the inner circumferential surface of the water-cooled jacket 71 and the bolt B are fastened to the support frame 732b perpendicularly perpendicular to the pressure frame 732a. A structure in which the main body 21 of the rotary kiln furnace 2 with respect to the chamber 6 can be stably fixed together with the seal 732a to adjust the degree of compression of the grand packing 74, and also according to the degree of compression. To prepare.

That is, the grand packing 74 may cool the heat transferred from the main body 21 of the rotary kiln 2 by the double contact of the air-cooled jacket 72 on the inside and the water-cooled jacket 71 on the outside. Low cost grandpacking 74 may solve the same low thermal stability problems.

In addition, even when the grand packing 74 is worn, the pressing flange 732 can continuously press the grand packing 74 to improve the life of the grand packing 74.

In addition, the connection portion 73 is composed of three components (support flange, grand packing, pressing flange) and two components (water cooling jacket, air cooling jacket) for cooling the grand packing 74 of the connecting means Since the operation is very simple and easy to maintain, the operability of the main body 21 of the rotary kiln 2 can be improved.

Hereinafter will be described briefly together with the accompanying drawings with respect to the operation of the first separation unit for removing the genre.

5 and 6 are operation diagrams of the first separator extracted from FIG.

As shown in FIG. 5 and FIG. 6, the syngas and the pyrolysis pyrolyzed in the rotary kiln 2 are discharged to the discharge side by the inclination of the rotary kiln 2, and the syngas discharged from the first and the first gas is discharged. It flows into the 1st pipe line 31 of the separating part 3 (FIG. 5 (a)).

At this time, the synthesis gas introduced into the first pipe line 31 is sent out through the second pipe line 32 in communication with the first pipe line 31, and by the own weight along the inclined first pipe line 31. It is stored in the storage tank 331 of the purge removal means (33).

When the genre reaches the storage limit value in the storage tank 331, the first gate valve 334 closes the inlet of the storage tank to intercept the inflow of the genre into the storage tank 331. (B))

Afterwards, the genre stored in the storage tank 331 is cooled through the cooling jacket 332 external to the storage tank 331 and the cooling pipe 333 disposed in a zigzag form in the storage tank 331 to external oxygen and Prevents genre from burning on contact.

The cooled genre is discharged to the outside by the opening of the second gate valve 335, after which the second gate valve 335 is closed. (FIG. 6C)

In addition, external oxygen stored in the storage tank 331 by supplying nitrogen to the nitrogen line 336 to remove external oxygen introduced into the storage tank 331 by opening the second gate valve 335. Remove ((d) of FIG. 6).

When the external oxygen is removed from the storage tank 331, the first gate valve 334 may be opened to allow genre to be stored in the storage tank 331 (FIG. 5A).

Hereinafter will be described briefly together with the accompanying drawings with respect to the operation of the second separation unit for removing tar.

7 is an operation diagram of the second separator extracted from FIG.

First, when the synthesis gas containing tar is introduced into the third pipe line 41 having a “U” shape, water is supplied through the nozzle pipe body 411, which is a cooling scrubber installed inside the inlet of the third pipe line 41 and the outlet inside. Scatter.

Then, the tar contained in the synthesis gas is collected by the scattering water, and the tar-collected water is not leaked to the outside through the third conduit 41 of the “U” type, but the storage tank of the tar removing means 42 ( 421) (FIG. 7A).

At this time, the inlet and outlet of the storage tank 421 is formed with a valve 422, respectively, can be configured to selectively discharge or inlet the water trapped tar (Fig. 7 (b)).

Therefore, the syngas sent through the third pipe line 41 of the second separation unit 4 may be stored in the storage tank 5 as a high-purity syngas from which char and tar are removed.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims

In low coal coal gas production system capable of producing coal gas mainly composed of syngas (H 2 and CO),

Supply unit 1 for guiding and transporting the low-cost coal injected into the hopper 11;

The rotary kiln is provided with a main body 21 that rotates, and the main body 21 is rotated to pyrolyze the lower coal injected into the main body 21 through the supply unit 1 and discharged in the form of syngas and char. (2);

A first separation unit (3) connected to the rotary kiln path (2) to recover the inflow into the purge removal means (33) by its own weight and induce and discharge only synthetic gas;

The tar (tar) included in the synthesis gas connected to the first separation unit (3) is collected through a cooling scrubber to recover the tar removal means (42), and the second separation unit (4) which induces and delivers only high-purity synthesis gas. );

It is made, including; a storage tank (5) connected to the second separator (4) for storing high purity syngas

Synthetic gas stored in the storage tank (5), syngas is synthetic coal, DME, methanol, low-purity coal gas production system, characterized in that can be used directly as a raw material for the production and power generation of high purity hydrogen.
The method of claim 1,

The lower coal is a low coal coal gas production system, characterized in that the moisture content is in the range of 5% by weight to 40% by weight to minimize the production of methane gas by forming the interior of the rotary kiln furnace 2 in a steam atmosphere. .
The method of claim 1,

The first separation unit 3 is connected to the discharge side of the rotary kiln 2, the first pipe 31 is installed to be inclined downward so as to be guided by the weight removal means 33 by the magnetic weight, and the Lower coal coal gas production system, characterized in that it comprises a second pipe (32) in communication with the first pipe (31) to induce and send only the synthesis gas to the upper portion.
The method of claim 3, wherein

The removal means 33 is a storage tank 331 installed at the connection point between the first conduit 31 and the second conduit 32, and the storage tank 331 is external to the outer peripheral surface of the storage tank 331 Cooling jacket 332 for cooling), a cooling pipe 333 disposed in a zig-zag shape inside the storage tank 331 to directly cool the inflow genre, and installed in the upper portion of the storage tank 331 And a second gate valve 334 installed at a lower portion of the storage tank 331 to control the inflow of the genre and regulating the discharge of the genre, and to increase the acquisition yield rate of the genre. Low coal coal gas production system, characterized in that consisting of a nitrogen line (336) for removing the oxygen introduced after the discharge of the genre through the second gate valve (335).
The method of claim 1,

The second separation unit 4 is composed of a third pipe line 41 of the "U" shape, tar removal means 42 connected to the center of the third pipe line 41,

The cooling scrubber is a low-coal coal gas production system, characterized in that the inlet of the third conduit (41), and the discharge pipe is installed on the inside of the discharge can be scattered water (411).
The method of claim 5,

The tar removing means 42 is a low-carbon coal, characterized in that consisting of a storage tank 421 for storing the water in which tar is collected, and a valve 422 formed at the inlet and outlet of the storage tank 421. Gas production system.
The method of claim 1,

The rotary kiln furnace (2) is a low-grade coal gas production system, characterized in that the sealed type for blocking the inflow of oxygen so as to prevent the combustion of low-grade coal, the body heating method.
The method according to claim 1 or 2 or 7,

Low rotary coal coal gas production system, characterized in that the operating temperature of the rotary kiln (2) is in the range of 400 ℃ to 900 ℃.
The method of claim 1,

The rotary kiln 2 is connected to the chamber 6 rotatably via a seal means 7 coupled to both sides of the main body 21, and each of the chambers 6 is provided with a supply unit 1 and a first unit. Low coal coal gas production system, characterized in that connected to the separation unit (3).
The method of claim 9,

The sealing means 7 is an air-cooled jacket 72 coupled to both outer circumferential surfaces of the main body 21 of the rotary kiln furnace 2, and one surface of the chamber 6 to guide and insert the air-cooled jacket 20. Cooling jacket 72 formed in the seal, the body 21 and the chamber (6) is connected between the seal, and coupled between the water-cooled jacket 71 and the air-cooled jacket 72 to prevent thermal deformation Low coal coal gas production system, characterized in that comprises a connection (73).
The method of claim 10,

The air-cooled jacket (72) low coal coal gas production system, characterized in that it further comprises a plurality of through-holes (721) at one end so that the outside air is communicated to the inside.
The method of claim 10,

The connecting portion 73 has a cross section seated on an inner circumferential surface of the water-cooled jacket 71.
"Shaped support flange 731, the grand packing 74 is fitted to the outer circumferential surface of the air-cooled jacket 72 and in close contact with the inside of the support flange 731, the support flange 731 and the air-cooled jacket ( 72, so that the cross section is inserted into the support flange 731 so as to press and seal the grand packing 74.
Low coal coal gas production system, characterized in that consisting of "pressing flange of the shape (732).
The method of claim 12,

The support flange 732 and the support flange 731 and the bolt (B) so that the main body 21 of the chamber 6 and the rotary kiln 2 is fixed by adjusting the pressing degree of the grand packing 74 Low coal coal gas production system characterized in that the fastening.
The method of claim 12,

The inner circumferential surface of the water-cooled jacket (71), the lower coal coal gas production system, characterized in that it further comprises a step (711) so that the support flange 731 is seated.