KR101825861B1 - Method for producing ashless coal - Google Patents
Method for producing ashless coal Download PDFInfo
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- KR101825861B1 KR101825861B1 KR1020167016635A KR20167016635A KR101825861B1 KR 101825861 B1 KR101825861 B1 KR 101825861B1 KR 1020167016635 A KR1020167016635 A KR 1020167016635A KR 20167016635 A KR20167016635 A KR 20167016635A KR 101825861 B1 KR101825861 B1 KR 101825861B1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/06—Heat exchange, direct or indirect
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/08—Drying or removing water
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/10—Recycling of a stream within the process or apparatus to reuse elsewhere therein
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/24—Mixing, stirring of fuel components
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/544—Extraction for separating fractions, components or impurities during preparation or upgrading of a fuel
Abstract
The thermal energy held by the solvent in the vapor state generated in the extraction process (for example, the extraction tank) and / or the ashless coal acquisition process (for example, the flasher) is controlled by at least one process for producing ashless coal, Or used as a heat source in the dehydration process (dehydration tank) (heaters for slurry dewatering), or heat recovery in a batch recovery boiler as thermal energy of steam.
Description
The present invention relates to a method for producing ashless coal for obtaining ashless coal from which ash is removed from coal.
As a method of producing the ashless carbon, for example, there is one described in
In the process for producing ashless coal, the coal and the solvent in a state such as slurry are heated in most of the processes. That is, thermal energy is given to the coal and the solvent. This heat energy (heating energy) is introduced from the outside of the process in the form of, for example, high-pressure steam, low-pressure steam or electricity.
Here, when used in any one of the processes for producing the ashless coal without disposing the arrays generated in the process of introducing thermal energy, it is possible to reduce the heat energy (heating energy) newly introduced from the outside of the process system, As a result, it is considered that the manufacturing cost of the unfired carbon (the running cost of the unfired manufacturing facility) can be reduced as compared with the conventional one. However, this does not mean that the present invention can be effectively utilized to contribute to the reduction of the manufacturing cost of the arrangement and the ashless carbon during the process of introducing thermal energy. The slurry or the like can not be efficiently heated even if the temperature of the resulting arrangement is excessively low or the amount of heat generated is too small. That is, the arrangement can not be used so as to contribute to the reduction of manufacturing cost of the ashless carbon. In this way, it is not possible to reduce the production cost of the ashless coal in the facility of the scale scale simply by using the arrangement generated in the process of introducing thermal energy.
In addition, the method of extracting the arrays generated in the step of introducing thermal energy is not a simple method, and does not contribute to the reduction of manufacturing cost of the ashless carbon. This is because, if the array taking out method is complicated, the equipment is complicated and accordingly, the introduction cost of the equipment is increased, and the labor cost of the operation is also increased.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a manufacturing method of ashless coal having a process of array use capable of reducing the manufacturing cost of the ashless coal (running cost of the ashless coal manufacturing facility) .
The present invention relates to a slurry producing method comprising: a slurry preparing step of mixing a coal and a solvent to prepare a slurry; an extraction step of extracting a coal component soluble in the solvent by heating the slurry obtained in the slurry preparing step; A separation step of separating the solvent into a solution containing a coal component soluble in the solvent and a solid concentrate in which a coal component insoluble in the solvent is concentrated; and a step of separating the solvent from the solution separated in the separation step, And an unburned carbon obtaining process for obtaining carbon. In this method for producing an ashless coal, it is preferable that the thermal energy held by the solvent in a vapor state generated in at least one of the extraction step and the non-recycle acquisition step is higher than the thermal energy held in at least one step At least one of the use as a heat source and the heat recovery from a batch recovery boiler as thermal energy of steam.
According to the present invention, the heat energy generated in the process for producing ashless coal can be effectively used for manufacturing ashless coal in a simple and effective manner. As a result, the production cost of the ashless coal (running cost of the ash production facility) Can be reduced.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a block diagram showing an ashless coal manufacturing facility for explaining a production method of an ashless coal according to a first embodiment of the present invention. FIG.
2 is a block diagram showing an ash tundish manufacturing facility for explaining a manufacturing method of the ashless coal according to the second embodiment of the present invention.
3 is a block diagram showing an ashless coal manufacturing facility for explaining a production method of an ashless coal according to a third embodiment of the present invention.
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
(First Embodiment)
As shown in FIG. 1, the ashless
The ashless
As a series of devices for effectively utilizing heat energy generated in the flasher 11 (solvent separator for ashlessoning), the ashless
In addition, as a device for effectively utilizing heat energy generated in the flasher 12 (solvent separator for byproducts), the ashless
Here, the method for producing ashless coal has a slurry preparation step, a slurry dewatering step, an extraction step, a separation step, an unburned carbon acquisition step, and a by-product tank acquisition step. Each of these steps will be described below. In addition, explaining each of these steps, the effective utilization of the heat energy generated in the manufacturing process of the ashless coal will be described.
The coal to be used as the raw material in the present production method is not particularly limited, and bituminous coal having a high extraction ratio (ratio of soluble components of coal extracted in the solvent) may be used as a raw material, and cheaper crude zeolite (bituminous coal, lignite) May be used as a raw material. The term "ashless coal" means that the ash content is 5% by weight or less, preferably 3% by weight or less.
<Slurry Preparation Process>
The slurry preparing step is a step of mixing coal and a solvent to prepare a slurry. The slurry preparation process is carried out in slurry preparation (3) in Fig. The raw coal is charged into the
The mixing ratio of coal to the solvent is, for example, 0.5 to 4.0 based on dry coal, and more preferably 0.75 to 2.0.
≪ Slurry dewatering step &
The slurry dewatering step is a step of dehydrating the slurry by preheating the slurry obtained (produced) in the slurry preparing step. The slurry dewatering process is carried out in the dehydration tank 5 in Fig. The slurry prepared in the slurry preparation (3) is supplied to the dehydration tank (5) by the feed pump (4). The slurry supplied to the dehydrating tank 5 is mixed by the
In the
The dehydration temperature of the slurry in the slurry dewatering step is a temperature higher than the boiling point of water and lower than the boiling point of the solvent, for example, 100 to 150 캜.
The slurry dewatering step may be omitted when the amount of water contained in the raw coal is small. When the slurry dewatering step is omitted, the slurry prepared in the slurry preparation step is directly sent to the next extraction step (see, for example, FIG. 2 in which the dewatering tank 5 is not installed).
<Extraction Process>
The extraction step is a step of heating the slurry dewatered in the slurry dewatering step to extract (soluble in a solvent) a coal component soluble in the solvent. The extraction process is carried out in the
Here, in the present embodiment, the slurry dewatered in the dewatering tank 5 is fed to the
The solvent in the vapor state generated in the
The water vapor (recovered heat energy) generated in the
Refer to the solvent. When the slurry obtained by mixing the coal and the solvent is heated to extract the coal component soluble in the solvent, a solvent having a large dissolving power for coal, in most cases, an aromatic solvent (a solvent of a hydrogen donor or a non-hydrogen donor) , The coal is mixed and heated to extract the organic component in the coal.
The non-hydrogenated solvent is a coal derivative, which is a solvent mainly composed of a bicyclic aromatic group, which is mainly purified from a coal product of coal. Examples of the main components of the non-hydrogenated naphthalene solvents include naphthalene, naphthalene, methylnaphthalene, dimethylnaphthalene and trimethylnaphthalene, which are two-ring aromatic compounds, and naphthalenes and aliphatic dicarboxylic acids having aliphatic side chains, , Fluorenes, and alkylbenzenes having biphenyls or long chain aliphatic side chains therein. In addition, a hydrogen-containing compound represented by tetralin (including coal liquefied oil) may be used as a solvent.
The boiling point of the solvent is not particularly limited. From the viewpoints of the pressure reduction in the extraction step and the separation step, and the extraction ratio in the extraction step, for example, a solvent having a boiling point of 180 to 300 캜, particularly 240 to 280 캜, is preferably used.
The heating temperature of the slurry in the extraction step is not particularly limited as long as the solvent soluble component can be dissolved and is preferably 300 to 420 DEG C in view of sufficient dissolution of the solvent soluble component and improvement of the extraction ratio, Lt; / RTI >
The extraction step is carried out in the presence of an inert gas such as nitrogen. The pressure in the
<Separation Process>
The separation step is a step of separating the slurry obtained in the extraction step into a solution containing a coal component soluble in a solvent and a solid concentrate (solvent insoluble matter concentrate) in which a coal component insoluble in a solvent is concentrated, for example, by gravity sedimentation . This separation step is carried out in the first
Further, the gravity sedimentation method is a method in which slurry is held in a vessel to sediment and separate the solvent insoluble component by gravity. As a method for separating the solution containing the coal component dissolved in the solvent from the slurry obtained in the extraction step, there are filtration method, centrifugal separation method and the like in addition to the gravitational sedimentation method.
In the
Here, in the present embodiment, the second
<Acquisition process of ashyo coal>
In the ash recovery step, the solvent is evaporated and separated from the solution (supernatant) separated in the above separation step to obtain ashless coal. This uncyclopedia acquisition process is carried out in the
The pressure in the tank of the
Further, the method of separating the solvent from the solution (supernatant) is not limited to the flash distillation method. As another separation method, for example, a thin film distillation method can be mentioned. The thin film distillation method is a method in which a distillation target (a solution separated in the separation step in the present invention) is introduced into a tank (thin film distillation tank) containing a scraper (also referred to as a wiper) and a thin film to be distilled is formed on the inner wall of the tank by a scraper And distillation is carried out continuously. The inner wall of the bath is heated from the outside. The pressure in the tank (thin film distillation tank) is, for example, 0.1 MPa (normal pressure).
On the other hand, the vaporized solvent separated from the solution is extracted from the top of the
<Process for obtaining by-products>
The by-product burning step is a step for obtaining by-products by evaporating and separating the solvent from the solid concentrate separated in the separation step. This by-product burning process is carried out in the
The pressure in the
Here, in the present embodiment, the thermal energy held by the vapor-state solvent generated in the
≪ Heat energy generated in the ash-free manufacturing process >
Examples of effective heat energy generated in the ash-free manufacturing process are summarized in Table 1. As can be seen from Table 1, the temperature of the heat energy generated in the extraction process (extraction tank 8) is as high as 400 ° C at maximum. The temperature of the heat energy generated in the ash recovery process (in the case of the flasher 11) is about 270 ° C at the maximum, which is lower than the temperature of the heat energy generated in the extraction process (extraction tank 8) 1.08 MMkcal / ton- Coal throughput is large. The "/ ton-coal throughput" means that 1 ton of coal is treated. Also, in Table 1, the device generated in the ashlesson obtaining process refers to the case where the flasher 11 (flash distillation method) is used in the ash recovery process as illustrated in Fig. The device that is generated in the ash recovery process is referred to as a thin film distillation tank when the thin film distillation tank (thin film distillation method) is used in the ash recovery step (also in Table 2).
<Where to use heat energy>
Table 2 shows an example of utilization of the thermal energy shown in Table 1 that occurs in the ash-free manufacturing process.
As shown in Table 1, since the temperature of the heat energy generated in the extraction process (extraction tank 8) is as high as 400 ° C at maximum, the extraction process (extraction tank 8) Can be applied as a heating source in various processes such as a slurry dewatering process, an extraction process, a separation process, and a steam recovery process.
On the other hand, the temperature of the heat energy generated in the flasher in the ash recovery process is about 270 ° C at the maximum, which is lower than the temperature of the heat energy generated in the extraction process (extraction tank 8). As a result, the heat energy generated by the flasher in the ash recovery process is not suitable for heating the object at 300 ° C. or higher, but the heat quantity is 1.08 MM kcal / ton-coal, It is suitable for heating on.
On the other hand, when a thin film distillation tank (thin film distillation method) is used in the ash recovery step, the temperature of the heat energy generated there is at most 300 ° C, which is higher than in the flasher (flash distillation method) However, since the amount of heat energy generated from the thin-film distillation tank is not so large as about 0.024 MMKcal / ton-coal throughput, it can be used as a heating source for heating the slurry in the slurry dewatering step or the extraction step, It is better to use it as a circle.
The calorific value of the heat energy generated in the flasher of the by-product burning process is 0.144 MMKcal / ton-coal throughput, which is larger than that of the heat energy generated from the thin film distillation tank. Therefore, the thermal energy generated in the flasher of the by-product burning process is suitable not only for use as a heating source for steam recovery but also for use as a heating source for heating slurry in a slurry dewatering process or an extraction process .
≪ Specific reduction amount of heat energy newly introduced from the outside of the process >
The ashless
<Action / Effect>
In the present invention, in each of the processes for producing the ashless coal, the thermal energy held by the vapor-state solvent generated in at least one of the extraction process and the non-recycle process is changed in at least one step And heat recovery from the heat recovery boiler as heat energy of the steam.
For example, heat is generated also in the slurry dewatering process (dehydration tank 5) and the separation process (
Further, in the present invention, the generated heat energy is treated as heat energy held by the vapor-state solvent. The solvent in the vapor state can easily be sent by connecting pipes between apparatuses. That is, the vaporized solvent is easy to handle.
As described above, according to the present invention, the thermal energy generated in the process for producing ashless coal can be effectively used in a simple and effective manner for the production of ashless coal. As a result, the production cost of the ashless coal Running cost) can be reduced.
Here, in the present embodiment, the heat energy held by the solvent in the vapor state generated in the extraction step (extraction tank 8) is supplied to the heat source for heating the solvent in the separation step (second gravitational forceps 10) As shown in FIG. Since the temperature of the heat energy generated in the extraction process (extraction tank 8) is as high as 400 DEG C at maximum, the gravity sedimentation can be effectively kept warm (heated) by the heat energy.
In the present embodiment, the heat energy held by the solvent in the vapor state generated in the extraction step (extraction tank 8) is supplied to the heat source for heating the solvent in the separation step (second gravity precipitate 10) And the remaining heat energy is recovered by the
Further, by supplying the vaporized solvent generated in the extraction step (extraction tank 8) directly to the
Further, in the present embodiment, the thermal energy held by the solvent in the vapor state generated in the ashless coal obtaining step (for example, the flasher 11) is used for heating the slurry in the extraction step (extraction tank 8) And is used as a heat source (second heat exchanger 13). The heating amount of the slurry in the
Further, in the present embodiment, the thermal energy held by the solvent in the vapor state generated in the ashless coal obtaining step (for example, the flasher 11) is used for heating the slurry in the extraction step (extraction tank 8) After being used as a heat source, the remaining heat energy is used as a heat source for slurry dewatering in the slurry dewatering step (dewatering tank 5) (heater for dewatering slurry 14). As shown in Table 1, since the amount of heat energy generated in the ash recovery process (flasher 11) is large, for example, at 1.08 MM kcal / ton-coal throughput, The slurry can be heated.
In the present embodiment, the thermal energy retained in the vapor state solvent generated in the by-product burning step (flasher 12) is recovered by the
(Second Embodiment)
The ashless
In the present embodiment, not the thermal energy held by the solvent in the vapor state generated in the uncyricer acquiring step (for example, the flasher 11), but the solvent in the vapor state generated in the extraction step (extraction tank 8) The heat energy to be retained is used as a heat source for heating the slurry in the extraction process (extraction tank 8). Structurally, the vapor-state solvent generated in the extraction process (extraction tank 8) is sent to the
According to this configuration, by using the heat energy generated in the extraction step (extraction tank 8) as energy for heating the slurry in the extraction step (extraction tank 8), the slurry in the
Further, in the present embodiment, the remaining heat energy is recovered by the
In the present embodiment, the heat energy retained by the solvent in the vapor state generated in the unburned gas obtaining step (for example, the flasher 11) is recovered as heat energy in the steam by the
According to this configuration, the steam (recovered heat energy) generated in the
(Third Embodiment)
The ash
In the present embodiment, the heat energy held by the vapor-state solvent generated in the extraction step (extraction tank 8) is used for heating hot oil (thermal oil) in the
In the process for producing ashless coal, it is necessary to set the coal and the slurry of the solvent to a high temperature state of, for example, 250 DEG C or more. Hot oil (thermal oil) is one of the heating media that heats slurry of coal and solvent. For example, in the case of using the thin film distillation method in the step of acquiring the unburned carbon, hot oil (thermal oil) is used for heating the thin film distillation tank. The hot oil (heat medium oil) is heated to, for example, 280 to 350 캜 in the
According to the above configuration, the thermal energy held by the solvent in the vapor state generated in the extraction step (extraction tank 8) can be reduced by at least one step (for example, It is not necessary to introduce an electric heater by using the heating oil (heating oil oil) used as a heating source. Even if the introduction of the electric heater does not become zero, the amount of the electric heater to be introduced is reliably reduced. Therefore, the installation cost and the running cost of the electric heater can be reduced.
Further, in the present embodiment, among the thermal energy held in the vapor state solvent generated in the extraction step (extraction tank 8), the remaining heat energy used for heating the hot oil (thermal oil) Is used as a heat source for heating the solvent in the separating step (second gravitational forceps 10) in the separating step (17). According to this configuration, the second
In the present embodiment, the thermal energy remaining in the steam is then recovered by the
≪ Specific reduction amount of heat energy newly introduced from the outside of the process >
Here, in the ashless
Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the claims.
The present application is based on Japanese Patent Application (Patent Application No. 2013-267438) filed on December 25, 2013, the content of which is incorporated herein by reference.
INDUSTRIAL APPLICABILITY According to the present invention, it is possible to reduce the running cost and effectively manufacture the ashless coal at low cost by effectively utilizing the arrangement of the ashless coal manufacturing facility.
1: Coal Hopper
2: solvent tank
3: Slurry preparation
4, 6, 16: Feed pump
5: Dehydration tank
7: Preheater
8: Extraction tank
9: First gravity sedimentation emphasis
10: Second gravity sedimentation emphasis
11, 12: a flasher (solvent separator)
13, 17: Heat exchanger
14: Slurry dewatering heater
18, 19: Sequence recovery boiler
100: Non-ferrous production facility
Claims (12)
An extraction step of heating the slurry obtained in the slurry preparing step to extract a soluble coal component in the solvent,
A separation step of separating the slurry obtained in the extraction step into a solution containing a coal component soluble in the solvent and a solid concentrate in which a coal component insoluble in the solvent is concentrated;
And an unburned carbon obtaining step of volatilizing and separating the solvent from the solution separated in the separating step to obtain an unburned carbon,
Wherein the heat energy held by the solvent in the vapor state generated in at least one of the extraction step and the non-recycle step is used as a heat source in at least one step of producing the ashless carbonaceous material, At least one of the heat recovery from the heat recovery boiler is performed as the heat energy,
Wherein the heat energy held by the solvent in the vapor state generated in the extraction step is used as a heat source for heating the solvent in the separation step.
The heat energy retained by the solvent in the vapor state generated in the extraction step is used as a heat source for heating the solvent in the separation step and then the remaining heat energy is recovered as heat energy in the steam recovery heat recovery boiler By weight.
An extraction step of heating the slurry obtained in the slurry preparing step to extract a soluble coal component in the solvent,
A separation step of separating the slurry obtained in the extraction step into a solution containing a coal component soluble in the solvent and a solid concentrate in which a coal component insoluble in the solvent is concentrated;
And an unburned carbon obtaining step of volatilizing and separating the solvent from the solution separated in the separating step to obtain an unburned carbon,
Wherein the heat energy held by the solvent in the vapor state generated in at least one of the extraction step and the non-recycle step is used as a heat source in at least one step of producing the ashless carbonaceous material, At least one of the heat recovery from the heat recovery boiler is performed as the heat energy,
Wherein the heat energy held by the solvent in the vapor state generated in the extraction step is used as a heat source for heating the slurry in the extraction step.
An extraction step of heating the slurry obtained in the slurry preparing step to extract a soluble coal component in the solvent,
A separation step of separating the slurry obtained in the extraction step into a solution containing a coal component soluble in the solvent and a solid concentrate in which a coal component insoluble in the solvent is concentrated;
And an unburned carbon obtaining step of volatilizing and separating the solvent from the solution separated in the separating step to obtain an unburned carbon,
Wherein the heat energy held by the solvent in the vapor state generated in at least one of the extraction step and the non-recycle step is used as a heat source in at least one step of producing the ashless carbonaceous material, At least one of the heat recovery from the heat recovery boiler is performed as the heat energy,
The thermal energy held by the solvent in the vapor state generated in the above-mentioned uncyclotric acquisition step is used as a heat source for heating the slurry in the above extraction step,
A slurry dewatering step of dewatering the slurry obtained in the slurry preparing step by preliminary heating is provided between the slurry preparing step and the extraction step,
The thermal energy retained by the solvent in the vapor state generated in the ashless coal obtaining step is used as a heat source for heating the slurry in the extraction step and the remaining thermal energy is used for the slurry dewatering in the slurry dewatering step As a heat source for the ashless coal.
An extraction step of heating the slurry obtained in the slurry preparing step to extract a soluble coal component in the solvent,
A separation step of separating the slurry obtained in the extraction step into a solution containing a coal component soluble in the solvent and a solid concentrate in which a coal component insoluble in the solvent is concentrated;
And an unburned carbon obtaining step of volatilizing and separating the solvent from the solution separated in the separating step to obtain an unburned carbon,
Wherein the heat energy held by the solvent in the vapor state generated in at least one of the extraction step and the non-recycle step is used as a heat source in at least one step of producing the ashless carbonaceous material, At least one of the heat recovery from the heat recovery boiler is performed as the heat energy,
Characterized in that the thermal energy held by the solvent in the steam state generated in the extraction step is recovered by heat in an arrangement recovery boiler as thermal energy possessed by steam.
An extraction step of heating the slurry obtained in the slurry preparing step to extract a soluble coal component in the solvent,
A separation step of separating the slurry obtained in the extraction step into a solution containing a coal component soluble in the solvent and a solid concentrate in which a coal component insoluble in the solvent is concentrated;
And an unburned carbon obtaining step of volatilizing and separating the solvent from the solution separated in the separating step to obtain an unburned carbon,
Wherein the heat energy held by the solvent in the vapor state generated in at least one of the extraction step and the non-recycle step is used as a heat source in at least one step of producing the ashless carbonaceous material, At least one of the heat recovery from the heat recovery boiler is performed as the heat energy,
Characterized in that the thermal energy held by the solvent in the steam state generated in the extraction step is used for heating the heat medium oil used as a heating source in at least one step of producing the ashless coal .
Characterized in that the remaining heat energy is used as a heat source for heating the solvent in the separation step after the thermal energy held by the solvent in the vapor state generated in the extraction step is used for heating the heat medium oil, A method of manufacturing an ashless carbon.
The remaining heat energy is used as a heat source for heating the solvent in the separation step after the thermal energy held by the solvent in the vapor state generated in the extraction step is used for heating the heat medium oil, And recovering heat from the batch recovery boiler as heat energy of the steam.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013267438A JP5990505B2 (en) | 2013-12-25 | 2013-12-25 | Production method of ashless coal |
JPJP-P-2013-267438 | 2013-12-25 | ||
PCT/JP2014/082590 WO2015098506A1 (en) | 2013-12-25 | 2014-12-09 | Method for producing ashless coal |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20160089455A KR20160089455A (en) | 2016-07-27 |
KR101825861B1 true KR101825861B1 (en) | 2018-02-05 |
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JP2005120185A (en) * | 2003-10-15 | 2005-05-12 | Kobe Steel Ltd | Method for producing ashless coal |
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