KR101100135B1 - Coal gasifier for char recycle and the method thereof - Google Patents

Abstract

The present invention relates to a coal gasification apparatus using a coal char recycle and a method thereof, and more particularly, carbon conversion rate is recycled by recycling the coal char discharged in the form of ash without the completion of gasification reaction in the pulverized coal which is the fuel of the coal gasifier. It relates to a technology that can increase the conversion).
According to the present invention, in a coal gasifier which generates a synthesis gas by gasifying coal powder in a gasifier, the coal char discharged in the form of ash to a steam vessel outside the gasifier after the gasification reaction is not completed is again produced. Provided is a coal gasifier for coal char recycle, characterized in that the recirculation is supplied to the gasifier.

Description

Coal gasifier and its method for recirculation of coal {{COAL GASIFIER FOR CHAR RECYCLE AND THE METHOD THEREOF}

The present invention relates to a coal gasification apparatus using a coal char recycle and a method thereof, and more particularly, carbon conversion rate is recycled by recycling the coal char discharged in the form of ash without the completion of gasification reaction in the pulverized coal which is the fuel of the coal gasifier. It relates to a technology that can increase the conversion).

Integrated Gasification Combined Cycle (IGCC) refers to power generation technology that operates coal-fired power plants after gasification. In other words, it converts coal into a synthesis gas composed mainly of hydrogen and carbon monoxide under high temperature and high pressure, removes harmful substances such as dust and sulfur compounds contained in the synthesis gas, and purifies to a level similar to natural gas to produce electricity. It is a development technology.

The IGCC is divided into a gasification process that generates syngas from coal, a purification process that removes particles and sulfur compounds contained in the syngas, and a clean synthesis gas, and a combined power generation process consisting of a gas turbine and a steam turbine.

The IGCC power generation method can reduce carbon dioxide by around 20% due to the increase in power generation efficiency compared to the conventional pulverized coal power generation method. And it can reduce the air pollutant SOx more than 95% and NOx generation more than 70%. Therefore, in terms of importing almost all domestic energy sources from abroad, such as Korea, it is essential to use coal as a fuel for generation, and thus, a power generation method such as IGCC that can satisfy environmental regulations expected by at least the mid-21st century will be selected. There is no choice but to reality.

IGCC technology produces syngas mainly composed of hydrogen and carbon monoxide, and separates and purifies hydrogen as needed to produce industrial raw materials such as fertilizers and power generation efficiency up to 60% or more (IGFC: Integrated Gasification Fuel Cell) It is also used as raw material gas. In addition, the IGCC technology has the great advantage that the sulfur component, which is the main component of environmental pollution in coal, can be recovered as pure sulfur that can be sold as a useful product.

In general, gasifiers that produce coal gas are classified into fixed bed gasifiers, fluidized bed gasifiers, and fractionated bed gasifiers.

Fixed-bed gasifier is a structure in which pulverized coal is supplied from the upper part of the reactor and gradually descends to the bottom, and steam and oxidant are supplied from the lower part and moved to the upper part, so that the pulverized coal is sequentially dried, volatilized, gasified, and burned by the rising gas. It is. Such fixed bed gasifiers have high heat recovery, high carbon conversion, low oxidant demand, good load control, etc., but the capacity of coal is difficult because of the long residence time of coal in the gasifier.

The fluidized bed gasifier has a structure in which pulverized coal supplied into the gasifier reacts with an oxidant in a fluidized state to generate coal gas. In the fluidized bed gasifier, pulverized coal and gas are uniformly mixed, so heat transfer and mass transfer occur at a higher speed than the fixed bed gasifier, thereby enabling a large capacity.

The fractionated bed gasifier is supplied with pulverized coal and oxidant in the same direction, and pulverized coal, oxidant and vapor are introduced into the gasifier at a very high speed. Compared with other types of gasifiers (fixed bed and fluidized bed gasifiers), the fractionated bed gasifier has more oxygen demand and coal gasification reaction proceeds at a high temperature, so the ash in coal is mainly melted and moved to the bottom of the gasifier by gravity. It flows down, cools and is released as a slag in the solid state. In the case of the fractionated bed gasifier, the carbon conversion rate is particularly good, and the residence time of coal in the gasifier is very short, thereby enabling a large capacity. In case of adopting the oxygen method in the fractionation bed gasifier, an additional air separation device is required, which requires a lot of electric power.However, since the heat capacity per unit volume is higher than that of the fixed bed and fluidized bed gasifiers, the gasifier for large-capacity power generation facilities is different. It is the easiest compared to the type gasifier.

In general, the fractionated bed gasifier melts the incombustibles contained in coal at high temperature and discharges them in slag form. For the smooth discharge of slag, it varies slightly depending on the composition of the incombustibles contained in coal, but the inside of the gasifier and the slag discharge part In the case of 1,500 ℃ or more high temperature maintenance is required. Therefore, the situation is to prepare a high temperature by constructing a layer of expensive refractory material that can withstand high temperatures.

However, since the high temperature synthesis gas is in direct contact with the refractory surface and the molten slag flows down the refractory surface, the refractory surface is continuously infiltrated and eroded. The part where pulverized coal is supplied or the part where slag is discharged is known to be about 6 months old.

Therefore, when the refractory material is damaged, it is difficult to operate the normal gasifier, so it is necessary to replace the refractory material. In order to replace the refractory material, the gasifier operation must be stopped. Operation stop for refractory replacement and reconstruction work will also stop the operation of various facilities (electric power production, chemical raw material production, synthetic natural gas production, etc.) that use the syngas produced from coal gasifiers. Furthermore, frequent replacement and new installation of expensive refractory materials will excessively increase the maintenance costs of gasifiers. In addition, in the case of the refractory material that can withstand high temperature is generally made of heavy metal components (chromium, etc.), the environmental treatment method of the damaged refractory material is also a problem.

In addition, in the case of gasifiers that melt the incombustibles in coal, there may be various problems in terms of operational safety.If molten slag is not discharged smoothly, many problems of gasifier operation due to blockage of slag outlets are reported. have. In addition, due to the high operating temperature, the molten fine slag is scattered like the syngas and attached to the gasifier outlet or the syngas cooler to block the syngas discharge pipe or the scattered slag is hardened, so that the metal of the syngas cooler or heat exchanger is hardened. It will wear or erode the material.

In order to solve this problem, a method of lowering the reaction temperature of the gasifier and converting the incombustibles contained in the coal into the ash form without melting may be considered. However, when the reaction temperature is lowered, some pulverized coal is not completed gasification reaction, converted to coal char, entangled with incombustibles, included in the synthesis gas, and moved to the downstream equipment. If the synthesis gas is included in this way, the carbon conversion rate, which is one of the main indicators related to the performance of the gasifier, may be reduced, and furthermore, the dust load may be increased in the dust collector installed in the rear end facility, thus making it difficult to operate stably.

The present invention for solving the above problems, the gasification by recycling the coal incomplete combustion is not completed so that the carbon conversion rate can be increased even if the gasifier is operated at a reaction temperature of about 1200 ℃ lower than the conventional gasifier reaction temperature It is an object of the present invention to provide a coal gasifier and a method thereof.

According to the present invention for achieving the above object, in the coal gasification apparatus for generating a synthesis gas by the gasification reaction of the pulverized coal in the gasifier, the gasification reaction is not completed and discharged in the form of ash to the tank vessel outside the gasifier Provided is a coal gasifier for recirculating coal chops, wherein the pulverized coal chops are supplied to the gasifier again for recycling.

The coal dust recirculation preferably uses the pressure difference between the steam vessel and the gasifier.

A level sensor for sensing the volume of water stored in the vessel and a gas supply pipe connected to the vessel for supplying gas to increase the internal pressure of the vessel when the level sensor senses a predetermined amount of volume in the vessel. Preferably, the fan vessel includes a fin feed pipe connecting the fin vessel and the gasifier to recycle the fin from the fin vessel to the gasifier.

The gas is preferably nitrogen gas or syngas.

It is preferred that a vent valve capable of regulating pressure be connected to the vessel to recirculate the vessel while maintaining a constant pressure difference between the vessel and the gasifier.

It is preferable that the cyclone and the gasifier are integrally formed so that the coal 부유 floats in the swirling air flow and moves under the action of centrifugal force and then collides with the wall to be collected from the airflow.

Here, it is preferable that an induction pipe is formed inside the cyclone to induce the flow of syngas to discharge the syngas to the rear end side.

The fin container includes a fin storage container connected to the gasifier, and a fin supply container connected to the fin storage vessel by a fin transport pipe, wherein the fin supply container and the gasifier are connected by fin supply pipes. It is preferable to recycle the coal 이송 transferred to the char supply vessel through the char feed pipe to the gasifier through the char feed pipe.

In order to equalize the pressure between the reservoir storage vessel and the gasifier after the transfer of the vessel from the vessel storage vessel to the vessel supply vessel, the vessel reservoir and the gasifier are preferably connected by a pressure equalization pipe.

Each of the reservoir reservoir and the vessel feeding container is provided with a level winding paper for sensing the reservoir storage amount, and when the level detector detects an amount of reserve of a predetermined amount or more, gas is supplied to supply the gas to the inside of the reservoir reservoir and the vessel supply vessel. It is preferable to include a gas supply pipe connected to each of the fin reservoir and the fin feed container so as to increase the pressure.

The gas is preferably nitrogen gas or compressed syngas.

In order to control the pressure of the fin reservoir and the fin feed vessel, it is preferable that a vent valve is connected to the fin reservoir and the fin feed vessel, respectively.

An auxiliary supply nozzle is connected to a lower end of the gasifier to supply recycled coal ,, and a reaction space is provided at an inner lower end of the gasifier to secure a reaction time of the recycled coal 되는 supplied through the auxiliary supply nozzle. It is preferred that it is formed.

According to another aspect of the present invention, in the coal gasification method for generating a synthesis gas by the gasification reaction of the pulverized coal in the gasifier, the coal storage vessel in the form of ash in which the gasification reaction is not completed, the bin storage vessel outside the gasifier Ejecting to; Transporting coal 촤 to the 촤 feed vessel through a 촤 transfer pipe connecting the 촤 storage vessel and the 촤 feed vessel; Recycling the coal char to the gasifier through a char feed pipe connecting the char feed container and the gasifier; Provided is a coal gasification method for coal 촤 recycling, comprising a.

Transferring coal 기로 to the 촤 feed container, by increasing the internal pressure of the 촤 storage container by the gas supplied through the gas supply pipe connected to the 촤 storage container, the coal 기로 to the 촤 supply container. After the transfer, it is preferable to return the pressure of the vessel storage vessel to its original state after closing the vessel transfer piping.

Recycling the coal char with the gasifier is performed by increasing the internal pressure of the char feed container by the gas supplied through the gas supply pipe connected to the char feed container, and recycling the coal char with the gasifier. It is preferable to maintain the pressure difference between the steam feed container and the gasifier to adjust the pressure of the steam feed container so that the coal steam can be supplied to the gasifier constantly.

The gas is preferably nitrogen gas or compressed syngas.

According to the present invention as described above, even if the gasifier is operated at a reaction temperature of about 1200 ℃ lower than the conventional gasifier reaction temperature, it is possible to recycle and gasify the coal 못한 not completed combustion, so as to increase the carbon conversion rate Coal gasifiers and methods can be provided.

Accordingly, according to the present invention, since slag does not occur during operation of the gasifier, infiltration and erosion of the refractory material due to high temperature slag are reduced, and thus the life of the refractory material is long. As a result, the operation stops and refractory reconstruction periods caused by frequent refractory replacement during gasifier operation are reduced, and the gasification operation is possible for a long time, so that the operation of facilities such as power generation or chemical fuel conversion using synthetic gas is stable. It becomes possible.

In addition, according to the present invention, since it is not necessary to use expensive fireproof materials that can withstand high temperatures due to the low gasifier reaction temperature, not only the initial construction cost and the maintenance cost are very low, but also Reduced use also solves the environmental problems of damaged refractory materials.

1 is a schematic view showing a coal gasifier according to the present invention.
Figure 2 is a schematic diagram for comparing the shape of the inner bottom of the coal gasifier according to the present invention.

Hereinafter, a coal gasifier for coal char recycling according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, in the coal gasifier for coal char recirculation according to a preferred embodiment of the present invention, the gasification reaction is completed when the pulverized coal produces a gasification reaction in the gasifier 1 to generate a synthesis gas. If not, the coal 배출 discharged in the form of ash into the ash container outside the gasifier 2 is supplied to the gasifier 2 so that it can be recycled.

At this time, because the coal 촤 recycle can be made by using the pressure difference between the gasifier 2 and the 촤 vessel, the 촤 vessel may be connected to the nitrogen supply pipes 36 and 46 as gas supply pipes. That is, due to the nitrogen supplied through the nitrogen supply pipes 36 and 46, the vessel can be relatively high pressure compared to the gasifier 2, so that coal 촤 can be recycled from the vessel to the gasifier 2. have. However, although the preferred embodiment of the present invention illustrates that nitrogen gas is supplied to the vessel, the compressed syngas may be supplied through a compressor (not shown) instead of nitrogen gas.

The pulverized coal supply nozzle 4 may be connected to the gasifier 2 so as to supply pulverized coal, which is a fuel, and an oxidant. The pulverized coal and the oxidant supplied through the pulverized coal supply nozzle 4 cause a gasification reaction inside the hot gasifier 1 to generate a synthesis gas mainly composed of hydrogen and carbon monoxide.

An auxiliary supply nozzle 5 may be connected to the bottom of the gasifier 2 so that the recycled coal 촤 may be supplied. However, at this time, since the auxiliary supply nozzle 5 is connected to the bottom of the gasifier 2, the recycled coal 촤 may cause a gasification reaction, and thus may not have a reaction time that may be converted into syngas. In other words, when the bottom of the gasifier 1 is formed as shown in FIG. 2, the coal 촤 moves directly along the flow of the synthesis gas as shown in the arrow direction, and thus the reaction time for converting the coal 촤 into the synthesis gas may be insufficient. have. However, as shown in FIG. 1, when a constant reaction space 7 is formed in the bottom of the gasifier 1, coal chops may be longer to stay in the gasifier 1. It may be advantageous to secure the time required for the conversion.

However, the recycled coal 수 can also be supplied through the 촤 supply nozzle 3 connected to the upper part of the gasifier 1, in which case sufficient reaction time is allowed to be converted into syngas as the coal 낙하 falls in the gasifier 2. Can be secured.

The gasifier 2 may be integrally formed with the cyclone 13 for the efficient collection of coal char. In more detail, when the coal mud floats in the syngas swirling air flow in the cyclone 13 and moves by the action of centrifugal force, and collides with the inner wall of the cyclone 13, it may be separated from the air flow and collected down. At this time, the synthesis gas separated from the coal 내부 due to the induction pipe 15 formed in the cyclone 13 is moved upward in the direction of the arrow along the induction pipe 15 and discharged to the rear end side. The syngas discharged in this way may be a power source for the gas turbine on the rear end side.

Here, the steam container may include a steam storage container 30 and a steam feed container 40 so as to stably recycle coal coal at a high pressure. That is, the coal 배출 discharged to the outside of the gasifier 2 is primarily collected in the 촤 storage container 30, and when coal 인 collected at a predetermined amount is transferred to the 촤 supply container 40, the gasifier in the 촤 supply container 40. (2) Coal chops are fed and can be recycled.

More specifically, the lower end of the cyclone 13 may be connected to the shock storage container 30 through the cyclone shutoff valve 21. Since the cyclone shutoff valve 21 is open when the coal is collected, coal 으로 is accumulated at the lower end of the storage container 30. The first level detector 35 may be connected to the storage container 30. The first level detector 35 detects the amount of coal 되는 accumulated at the bottom of the 촤 storage container 30, and when a certain amount of coal 촤 is accumulated, the cyclone shutoff valve 21 is closed to store the cyclone 13 and the 촤 storage. The container 30 can be spatially separated.

After the cyclone shutoff valve 21 is closed, the first nitrogen control valve 37 is opened to allow nitrogen gas to flow into the storage container 30 through the first nitrogen supply pipe 36 connected to the storage container 30. Can be supplied. By supplying nitrogen gas, the pressure inside the storage container 30 may increase. At this time, the first differential pressure transmitter (DPT, 50) measuring the pressure difference between the storage container 30 and the supply container 40 detects the pressure of the storage container 30 and reaches a pressure range suitable for transport. By opening the 촤 feed valve 39, the 촤 storage container 30 and the car supply container 40 are connected through the 촤 transfer pipe 38 so that the coal 촤 can be transferred to the 촤 supply container 40. In this case, the second vent valve 42 may be opened to discharge nitrogen introduced into the supply container 40 from the storage container 30 during transporting so that the supply container 40 may not be further pressurized.

When coal 촤 is transferred from 촤 storage container 30 to 촤 supply container 40, when the second level sensor 45 connected to the 용 supply container 40 detects that an appropriate amount of coal 이송 has been transferred, The shock feed valve 39 installed in the pipe 38 is closed. At this time, 촤 the storage container 30 is in a high pressure state 를 by opening the first vent valve 32 connected to the storage container 30 to discharge nitrogen gas through the first vent pipe 31 촤 storage container 30 The internal pressure of the can be reduced. When the pressure of the cyclone 13 and the reservoir reservoir 30 is similar through the discharge of nitrogen gas, the pressure equalization valve 23 is opened, and the reservoir 30 and the cyclone 13 are connected through the pressure equalization pipe 22. The pressures are equal because they are connected.

When the pressure of the cyclone 13 and the fin storage vessel 30 is the same, the closed cyclone shutoff valve 21 can be opened again to collect coal char in the fin storage vessel 30.

On the other hand, the second supply valve 40 is open to the second nitrogen control valve 47 is a state in which nitrogen gas is continuously supplied through the second nitrogen supply pipe 46 connected to the supply container (40). Furthermore, after the transfer of coal to the feed container 40 is completed, the feed pipe 38 is closed, so that the feed container 40 may maintain a pressurized state.

촤 Since the supply container 40 has a relatively high internal pressure than the gasifier 2, the coal 촤 is supplied to the gasifier 2 from the supply container 40 through the supply pipe 48 to be recycled. Can be. At this time, the second vent pipe 41 may be connected to the 촤 supply container 40 for the stable recycling of coal 촤. That is, the second differential pressure transmitters (DPT, 51) for measuring the pressure difference between the gasifier (2) and the fuel supply container (40) control the second vent valve (42) provided in the second vent pipe (41). By maintaining a constant pressure difference between the fire 2 and the steam supply container 40, a certain amount of coal 촤 can be recycled at all times.

Although not shown in the figure, the fin supply pipe 48 may be selectively connected to the fin supply nozzle 3 at the top of the gasifier 2 or to the secondary supply nozzle 5 at the bottom of the gasifier 2. Therefore, according to the state of the coal char, it is possible to recycle the coal char by connecting the char feed pipe 48 to the char feed nozzle 3 or the auxiliary feed nozzle 5.

Hereinafter, with reference to the drawings will be described the operation of the coal gasifier for coal char recycling according to the present invention. The coal gasifier according to the present invention can further exert its effect at low operating temperatures. For example, when the device is operated at about 1,200 ° C. lower than the reaction temperature of 1,500 ° C. of the conventional gasifier, the high temperature molten slag may not be discharged, but carbon conversion may be lowered. In the case of using the coal gasifier using the recycle according to the embodiment it is possible to increase the carbon conversion rate.

As shown in FIG. 1, when pulverized coal and an oxidant are supplied to the inside of the gasifier 1 through the pulverized coal supply nozzle 4, a spontaneous gasification reaction may proceed in the inside of the gasifier 1 heated to an appropriate temperature.

In the gasifier 1, the synthesis gas is generated and moves in the direction of the arrow. In the cyclone 13, the synthesis gas forms a swirling air stream along the outside of the induction pipe 15, and thus the gasification reaction is not completed. After hitting the cyclone wall, it is collected down. The synthesis gas contains coal particles which have been completed gasification reaction, and since these coal particles have only small inflammable material components, the particles are small. Therefore, the coal particles rise together with the synthesis gas along the inside of the induction pipe 15 to the upper portion of the cyclone 13. It may be moved and passed through a syngas cooler (not shown) or a heat exchanger (not shown), and then collected in a dust collector (not shown), and thus, pure syngas, from which non-combustibles have been removed, may be supplied to the downstream equipment side.

Coal 촤 can be collected in the 촤 storage container 30 connected to the lower portion of the cyclone 13 and subsequently recycled to the 촤 supply container 40 and the gasifier 2 can be recycled. Let's do it.

When the coal char is recycled to the gasifier (2) it can cause a gasification reaction again to compensate for the lower carbon conversion rate of the coal gasifier according to a preferred embodiment of the present invention operating at a lower temperature than the existing coal gasifier .

Hereinafter, a coal gasification method for coal char recycling according to a preferred embodiment of the present invention will be described in detail with reference to the drawings.

According to one embodiment of the present invention, a coal gasification method of generating a synthesis gas by gasifying coal dust in the gasifier 2 includes ash coal in the form of ash in which the gasification reaction is not completed. 2) discharging to an external heat storage container 30; Transferring coal to the char supply vessel (40) through a char transport pipe (38) connecting the char reservoir (30) and the char feed vessel (40); Recirculating coal chops to the gasifier through a chopped feed pipe (48) connecting the chopped feed container (40) and the gasifier (2); It may include.

At this time, in the step of transferring the coal 로 to the 촤 supply container 40, the coal 촤 can be transferred to the 촤 supply container 40 only by increasing the pressure of the 촤 storage container 30, the 촤 storage container 30 Through the first nitrogen supply pipe 36 connected to the nitrogen can be supplied to the storage container (30). In addition, after the coal 촤 is transferred to the 촤 supply container 40, the coal 다시 should be collected in the 촤 storage container 30 again, so that the first vent valve 32 connected to the 촤 storage container is adjusted to adjust the 촤 storage container 30. ) Can be returned to its original state.

In the step of recirculating coal 로 with the gasifier 2, the pressure of the 촤 feed container 40 must be increased so that the coal 촤 can be fed back into the gasifier 2 to recycle the coal 있으므로 so that the coal feed container ( Through the second nitrogen supply pipe 46 connected to 40 may be supplied to the nitrogen supply vessel (40). In addition, by controlling the second vent valve 42 connected to the feed container 40 through the second differential pressure transmitter (DPT, 51) for the stable supply of coal to the fuel feed container 40 and the gasifier (2) The pressure difference can be kept constant.

Thus, according to the coal gasification apparatus and method using the coal 촤 recycle of the present invention, since the gasifier reaction temperature is slightly lowered may have a structure that can recycle the coal 하며 to prevent the carbon conversion rate is lowered and melted The high temperature slag does not occur in the state, the life of the refractory can be long.

In addition, according to the coal gasification apparatus and method using the coal char recirculation of the present invention, since the gasifier and the cyclone can be formed integrally, the coal char can not be completed the gasification reaction can be more efficiently collected through the cyclone.

As mentioned above, the coal gasification apparatus and its method using the coal dust recycling which concerns on this invention were demonstrated with reference to the preferable Example of this invention. However, the present invention is not limited to the embodiments and drawings described above, and various modifications and changes may be made by those skilled in the art to which the present invention pertains within the scope of the claims.

1: inside gasifier 2: gasifier
3: 촤 supply nozzle 4: pulverized coal supply nozzle
5: auxiliary supply nozzle 7: reaction space
13: cyclone 15: induction piping
21: cyclone shutoff valve 22: pressure equalization pipe
23: Pressure equalization valve 30: Shock reservoir
31: first vent pipe 32: first vent valve
34: 촤 reservoir discharge valve 35: first level detector
36: first nitrogen supply pipe 37: first nitrogen control valve
38: 촤 Feed piping 39: 촤 Feed valve
40: supply container 41: second vent piping
42: second vent valve 44: 촤 supply container discharge valve
45: second level detector 46: second nitrogen supply piping
47: second nitrogen control valve 48: supply piping
49: 촤 supply valve 50: first differential pressure transmitter (DPT)
51: second differential pressure transmitter (DPT)

Claims (17)

In the coal gasifier which produces a synthesis gas by gasifying coal powder in a gasifier,
The coal gas discharged in the form of ash into the steam container outside the gasifier because the gasification reaction was not completed is supplied to the gasifier again and recycled.
The auxiliary supply nozzle is connected to the bottom of the gasifier so that the recycled coal 촤 can be supplied,
Coal gasifier for recirculating coal 촤, characterized in that the reaction space is formed at the inner bottom of the gasifier to ensure the reaction time of the recycled coal 공급 supplied through the auxiliary supply nozzle. The method according to claim 1,
The coal charcoal recycling is a coal gasifier for coal char recycling, characterized in that to use the pressure difference between the steam container and the gasifier. The method according to claim 1,
A level detector for detecting a volume of storage of the volume container;
A gas supply pipe connected to the vessel in order to supply gas when the level detector detects a predetermined amount of volume of the vessel and increase the internal pressure of the vessel;
And a fin feed pipe connecting the fin vessel and the gasifier to recycle the fin from the fin vessel to the gasifier. The method according to claim 3,
The gas is a coal gasifier for coal char recycle, characterized in that the nitrogen gas or compressed synthesis gas. The method according to claim 2,
And a vent valve capable of regulating the pressure in order to recirculate the steam while maintaining a constant pressure difference between the steam vessel and the gasifier. The method according to claim 1,
And a cyclone which is floated in the swirling air stream and moves by the action of centrifugal force, and collides with the wall so as to be separated and collected in the airflow, and the gasifier is formed integrally. The method of claim 6,
Coal gasifier for coal 석탄 recycling, characterized in that the induction pipe is formed inside the cyclone to induce the flow of the synthesis gas to discharge the synthesis gas to the rear end equipment side. The method according to claim 1,
The fin container includes a fin storage container connected to the gasifier, and a fin supply container connected to the fin storage container by a fin transport pipe,
The char feed container and the gasifier are connected to a char feed pipe, and the char char transported from the char reservoir to the char feed container via the char feed pipe is recycled to the gasifier through the char feed pipe. Coal gasifier for recirculating coal sludge. The method according to claim 8,
The coal storage container and the gasifier is connected by a pressure equalization pipe so as to equalize the pressure of the gas storage container and the gasifier after the air is transferred from the gas storage container to the fuel supply container. 석탄 coal gasifier for recycling. The method according to claim 8,
The cold storage container and the cold feed container are provided with a level winding paper for sensing the amount of cold storage.
When the level detector detects a predetermined amount or more of gas, the gas supply pipes respectively connected to the gas reservoir and the gas supply vessel may be supplied to supply gas to increase the internal pressure of the gas reservoir and the gas supply vessel. Coal gasifier for coal 촤 recycling, characterized in that it comprises. The method according to claim 10,
The gas is a coal gasifier for coal char recycle, characterized in that the nitrogen gas or compressed synthesis gas. The method according to claim 8,
And a vent valve is connected to each of the fin reservoir and the fin feed vessel to adjust the pressure of the fin reservoir and the fin feed vessel. delete delete delete delete delete

Images