WO2015093845A1 - Coal high-quality processing system and coal high-quality processing method - Google Patents

Abstract

Provided is a coal high-quality processing system comprising: a dryer for supplying a flue gas, the temperature of which has been elevated, and thereby drying coal; a carbonization reactor for causing the coal, which has been dried by the dryer, to under carbonization reaction; a cooler for cooling cokes, which has been generated from the coal that has undergone carbonization reaction; a condenser for condensing moisture mixed with flue gas provided from the dryer; and a heat exchanger for cooling a volatile fraction including tar oil discharged from the carbonization reactor using the flue gas cooled by the condenser. The coal high-quality processing system makes it possible to obtain tar oil economically and highly efficiently using a low-temperature carbonization process regarding low-grade coal.

Description

High quality treatment system of coal and high quality treatment method of coal

A high quality treatment system for coal and a high quality treatment method for coal.

Lignite has been limited in its utilization due to its high water content, high risk of spontaneous ignition during transportation, and low calorific value. However, as the use of high grade coal increases and reserves decrease, interest in utilizing lignite, a low grade coal, is increasing.

In order to carbonize lignite, which contains a lot of water, it is necessary to first remove moisture in the lignite.

Low temperature carbonization is a technique for pyrolyzing coal and converting it into solid, liquid and gaseous products. The low temperature carbonization process can be divided into direct heating, indirect heating, direct and indirect heating according to the heating method, and is divided into a method using a solid material and a gas material depending on the heat transfer method.

The indirect heating method has the disadvantage that the quality of the solid product produced is not uniform because the heat transfer efficiency is low and the heat is not evenly transferred. In addition, in order to transfer heat to the center of the reactor, the temperature must be kept higher than the target temperature. In this case, the volatilization of coal causes a secondary reaction, which leads to a decrease in the yield of tar oil.

In the direct heating method, the reactor may have a uniform temperature distribution as a whole, but since the volatile matter of coal and the flue gas, which is a heat transfer material, are mixed, a separate process for separating the volatile matter and the flue gas requires a disadvantage in that the investment cost increases. In addition, when the heat transfer material uses a solid material such as a ceramic ball in the direct heating method, coal fine powder production is increased due to friction between the coal and the ceramic ball, thereby lowering the yield of the solid product. In addition, to uniform the temperature distribution in the reactor, ceramic balls must be continuously mixed to increase the area and time of contact with coal, which requires additional equipment and additional equipment to separate coal and ceramic balls. Therefore, there is a problem that the process cost increases.

One embodiment of the present invention can provide a high yield of tar oil from a low grade coal, and provides a high quality coal treatment system of high efficiency in terms of energy saving.

Another embodiment of the present invention provides a high-quality tar oil of high yield from low grade coal, and provides a high-quality treatment method of coal in terms of energy saving.

In one embodiment of the invention,

A dryer for supplying the heated flue gas to dry coal;

A carbonization reactor for carbonizing the coal dried in the dryer;

A cooler for cooling the coke produced from the carbonized coal;

A condenser to condense the moisture mixed with the flue gas received from the dryer; And

A heat exchanger for cooling the volatile matter containing tar oil discharged from the carbonization reactor using flue gas cooled in the condenser;

It provides a high quality treatment system of coal comprising.

The apparatus may further include a combustor generating a heated flue gas supplied to the dryer, wherein the combustor may supply the heated flue gas to the carbonization reactor.

The flue gas supplied to the carbonization reactor may be cooled in the heat exchanger, and the flue gas supplied to the cooler in the carbonization reactor may be introduced into the combustor and recycled.

The high quality coal processing system may further include tar condensation means for condensing and collecting the cooled tar oil.

The high quality treatment system of coal may further include tar collecting means for collecting tar oil condensed in the tar condensing means.

Water discharged from the cooler and water discharged from the condenser may be supplied to the cooler and recycled.

The flue gas supplied to the dryer may be cooled in the condenser, then supplied to the heat exchanger, heated up, and then re-introduced into the dryer to be recycled.

The high quality coal processing system may further include a blower provided between the heat exchanger and the cooler to transfer the flue gas from the heat exchanger to the cooler.

The temperature of the volatiles including the tar oil discharged from the carbonization reactor may be 150 to 300 ℃.

The carbonization reaction temperature of the coal in the carbonization reactor may be 500 to 700 ℃.

The temperature of the flue gas supplied to the carbonization reactor may be 800 to 1200 ℃.

The vertical retort device formed by integrating the dryer, the carbonization reactor, and the cooler, wherein the carbonization reactor has a tar oil in a region where the temperature is lowered from the bottom of the vertical retort device and the temperature is 150 to 300 ° C. It may be provided with a discharge port for discharging volatile matter containing.

In another embodiment of the invention,

Supplying a heated flue gas into a dryer to dry coal;

Condensing moisture mixed with flue gas from the dryer to remove water from the flue gas;

Supplying the dried coal to a carbonization reactor, supplying a heated flue gas and carbonizing the coal by heat transferred therefrom to generate tar oil and coke;

Discharging the tar oil produced in the carbonization reactor from the carbonization reactor and collecting the tar oil by heat exchange by contacting with the flue gas mixed with the water removed from the dryer and discharged and cooled together upon condensation of the water; And

Delivering the coke generated in the carbonization reactor to the cooler to collect the coke by cooling to provide a high-quality treatment method of coal comprising a.

The high quality treatment method of the coal may further comprise the step of supplying to the dryer after the flue gas discharged and cooled along with the water removed from the dryer is heated in contact with the tar oil discharged from the carbonization reactor, the temperature is elevated. .

In the high quality treatment method of the coal, flue gas is discharged together when the generated tar oil is discharged from the carbonization reactor, and the flue gas discharged together is discharged together with the moisture removed from the dryer to be in contact with the cooled flue gas. The method may further include supplying the cooler after the heat exchange is cooled.

The high quality treatment method of the coal may further include the step of cooling and then discharging the coke supplied to the cooler and supplied to the dryer or the carbonization reactor.

In the high quality treatment method of the coal, the temperature of the tar oil discharged from the carbonization reactor may be 150 to 300 ℃.

In the high quality treatment method of the coal, the carbonization reaction temperature of the carbonization reactor may be 500 to 700 ℃.

In the high quality treatment method of the coal, the temperature of the flue gas supplied to the carbonization reactor may be 900 to 1200 ℃.

The coke may be first cooled by the flue gas cooled in the heat exchanger after being discharged from the carbonization reactor, and secondly cooled by the water to perform a second stage cooling step.

By the high quality treatment system of coal and the high quality treatment method of coal, it is possible to obtain tar oil with economical and high efficiency using low temperature carbonization process for low grade coal.

1 is a process diagram showing each step of the high-quality treatment method of coal using a high-quality treatment system of coal according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

1 is a process diagram showing each step of the high-quality treatment method of coal using a high-quality treatment system of coal according to an embodiment of the present invention.

The high quality treatment system of coal is:

A dryer 2 for drying coal;

A carbonization reactor (3) connected to the dryer (2) for carbonizing the coal dried in the dryer;

A cooler (4, 5) connected to the carbonization reactor (3), for cooling the coke produced from the carbonized coal;

A condenser (11) connected to the dryer (2) and condensing moisture mixed with the flue gas received from the dryer (2); And

The heat exchanger 6 is connected to the condenser 11 and the dryer 2 and cools and condenses the volatile component including the tar oil discharged from the carbonization reactor.

The high quality coal processing system may further include connecting means for connecting the condenser 11 and the heat exchanger 6 to supply the flue gas cooled in the condenser 11 to the heat exchanger 6. .

The high quality treatment system of coal may further comprise a combustor 10 providing hot flue gas to the dryer 2 and the carbonization reactor 3. The combustor 10 is connected to the coolers 4 and 5, the carbonization reactor 3, and the dryer 2, respectively, and receives a low temperature flue gas from the coolers 4 and 5 to raise the temperature so as to generate a high temperature flue gas. Gas may be provided to the dryer 2 and the carbonization reactor 3.

The high quality treatment system of coal may further comprise tar condensation means 7 for condensing and collecting the cooled tar oil. The tar condensation means 7 may be connected to each of the heat exchanger 6 and the coolers 4, 5.

The high quality treatment system of coal may further comprise tar collecting means (not shown) for collecting the condensed tar oil 8.

The high quality treatment system of coal is a blower 13 provided between the heat exchanger 6 and the coolers 4, 5 for delivering flue gas from the heat exchanger 6 to the coolers 4, 5. It may further include. For example, if the tar condensation means 7 is provided between the heat exchanger 6 and the coolers 4, 5, the blower 13 is the tar condensation means 7 and the cooler 4. , 5).

The coal high quality treatment system may further comprise coke collecting means (not shown) for obtaining semi-coke 9 cooled in the cooler.

The high quality treatment system of coal is connected to the coolers (4, 5) to store the water to be provided to the coolers (4, 5), or a water storage tank for storing the water discharged from the coolers (4, 5) 12) may be further included.

The coolers 4 and 5 may be formed in a two-stage structure as shown in FIG. That is, the coolers 4 and 5 may include a first cooler 4 connected to the carbonization reactor 3 and a second cooler 5 connected to the first cooler 4. In this case, the first cooler 4 may be connected to the combustor 10 and the tar condensation means 7, and the second cooler 5 may be connected to the water storage tank 12. The coke produced in the carbonization reactor 3 is quenched in the first cooler 4 to be primarily cooled, and secondly cooled by the coolant by the second cooler 5 secondly. It can be cooled sufficiently.

In the high quality treatment system of the coal, the dryer 2, the carbonization reactor 3 and the coolers 4, 5 may be a retort device consisting of one unit, in particular a vertical retort device. It can be formed as. Alternatively, in the high quality treatment system of coal, one device is a drying unit corresponding to the dryer 2, a carbonization reaction unit corresponding to the carbonization reactor 3, and a cooling unit corresponding to the coolers 4 and 5. It may be a separate integrated reboot device.

The coal high quality treatment system formed by the vertical retort apparatus is an installation cost-effective, simple apparatus, and minimizes the energy required for driving. As described above, the coal high quality treatment system is formed of a retort device to save energy and improve the yield of tar oil obtained by using low grade coal as a raw material.

Referring to Figure 1, the high quality treatment method of the coal:

Supplying the heated flue gas into the dryer 2 to dry the coal;

Condensing moisture discharged by mixing with the flue gas from the dryer (2) to remove water from the flue gas;

Supplying the dried coal to a carbonization reactor (3), supplying the heated flue gas and carbonizing the coal by heat transferred therefrom to produce tar oil and coke;

The tar oil generated in the carbonization reactor (3) is discharged from the carbonization reactor (2), mixed with the water removed from the dryer (3) and discharged, and heat exchanged by contacting with the flue gas cooled together when condensing the water. Capturing tar oil; And

Transferring the coke produced in the carbonization reactor (3) to a cooler (4, 5) to cool to collect the coke (9);

It includes.

The above-mentioned high quality treatment method of coal can be divided into three steps, which is a drying step for greatly drying the coal, followed by a carbonization step for carbonizing the dried coal and a cooling step for cooling the carbonized coal such as the obtained coke. The carbonization process and the cooling process proceed sequentially.

The high quality treatment method of coal may use a direct heating method in which hot flue gas is directly contacted with coal to dry and carbonize the coal.

The hot flue gas may be produced by the combustor 10 and then supplied to the dryer 2 and the carbonization reactor 3.

Drying of coal is carried out in the drier 2, carbonization of coal is carried out in the carbonization reactor 3, and cooling of carbonized coal such as coke obtained is carried out in the coolers 4 and 5.

When the raw coal 1 is dried by putting the raw coal 1 into the dryer 2, the coal has a low moisture content, and at the same time, the coal is preheated before carbonization for the subsequent carbonization reaction.

The raw coal 1 may be a coal containing a water content of about 30 to about 50% by weight.

The dried coal may be dried to a moisture content of about 10% by weight or less and supplied to the carbonization reactor 3.

By the high-quality treatment method of the coal, by using a direct heating method, it is possible to perform a low temperature carbonization process at about 500 ℃ to about 700 ℃ for low grade coal, such as lignite.

The dryer 2 may receive flue gas from the heat exchanger 6 and the combustor 10. The temperature of the flue gas derived from the combustor 10 is relatively higher than the temperature of the flue gas derived from the heat exchanger 6. The dryer 2 is connected to both the heat exchanger 6 and the combustor 10 so that the temperature of the flue gas supplied thereto may be maintained at about 200 ° C to about 300 ° C.

The moisture derived from the raw coal 1 in the dryer 2 is introduced into the condenser 11 at the top of the dryer 2 together with the flue gas, and the water is condensed in the condenser 11 to become water. Flue gas discharged from the dryer 2 is cooled in the condenser 11.

The water condensed in the condenser 11 may be stored in the water storage tank 12 and then quenched or rehydrated of carbonized coal such as coke obtained by being supplied to the coolers 4 and 5. have.

The carbonization reactor 3 is supplied with a hot flue gas and used for a carbonization reaction, and the dried coal supplied from the dryer 2 is carbonized in a carbonization reaction by the hot flue gas to generate tar oil and coke. .

The temperature of the carbonization reaction may be performed at about 500 to 700 ℃.

The tar oil is obtained as a volatile component during the carbonization reaction of coal, and the volatile component is discharged from the upper portion of the carbonization reactor 3 as a mixed gas together with flue gas, and then cooled in a heat exchanger 6 to be cooled into the tar oil (8). Can be obtained by collecting In order to prevent the volatile matter from condensing in the carbonization reactor 3, the upper temperature of the carbonization reactor 3 is maintained at a temperature above the boiling point of the volatile matter.

The volatile matter containing the tar oil in the heat exchanger 6 may be cooled by the flue gas cooled in the condenser 11. That is, the flue gas cooled in the condenser 11 is introduced into the heat exchanger 6 to exchange heat with the volatile component including the tar oil. As a result, the volatile matter containing the tar oil is cooled, and the flue gas cooled in the condenser 11 is heated.

The flue gas cooled in the condenser 11 can sufficiently cool the volatile matter provided in the heat exchanger 6, thereby further increasing the yield of tar oil collected in the tar condensation means 7.

The flue gas cooled in the condenser 11 may be supplied to the dryer 2 after being heated up by heat exchange with a volatile component including tar oil in the heat exchanger 6. As a result, the flue gas supplied from the heat exchanger 6 to the dryer 2 via the condenser 11 and the heat exchanger 6 may be circulated again through the condenser 11 and the heat exchanger 6. have. That is, the flue gas is discharged from the dryer 2 to the condenser 11, cooled and then supplied to the heat exchanger 6 to be heated up, and re-injected into the dryer 2 from the heat exchanger 6. Can be recycled. By this recirculation, the flue gas cooled in the condenser 11 is recycled as a cooling gas in the heat exchanger 6, while at the same time absorbs the thermal energy of the hot volatiles discharged from the carbonization reactor 3 and again dry the coal. And since it is reused for preheating, it is possible to improve energy efficiency.

1 shows the path of the flue gas circulating through the dryer.

In order to maintain the temperature of the dryer 2 at about 200 to about 300 ° C., the hot flue gas may be replenished from the combustor 10 in addition to the flue gas circulated as described above. The hot flue gas produced in the combustor 10 may be provided to the dryer 2 and the carbonization reactor 3, where the flue is provided to the dryer 2 and the carbonization reactor 3, respectively. The amount of gas can be adjusted. For example, the amount of flue gas provided to the carbonization reactor 3 may be adjusted to be greater than the amount of flue gas provided to the dryer 2.

The tar oil 8 cooled in the heat exchanger 6 may be condensed and collected in the tar condensation means 7 connected to the heat exchanger 6.

The flue gas discharged together with the volatile component containing tar oil in the carbonization reactor 3, like the volatile component, is cooled by heat exchange in the heat exchanger 6 with the cooled flue gas delivered by the connecting means, It may be supplied to the coolers 4, 5 and may likewise be supplied to the cooler via the tar condensation means 7. Thereby, the flue gas supplied to the carbonization reactor 3 is introduced into the combustor 10 via the heat exchanger 6, optionally the tar condensation means 7 and the coolers 4, 5, and again a dryer or Can be recycled to the carbonization reactor. By this recirculation, the volatiles and flue gas discharged from the carbonization reactor 3 are cooled by heat exchange, and the hot coke is recycled as a cooling medium, fed back to the combustor 10 and reused.

When the flue gas discharged from the coolers 4 and 5 is introduced into the combustor 10 and then heated up, the flue gas is re-introduced into the dryer 1 and the carbonization reactor 2 and recycled according to the degree of temperature increase.

1 shows the path of the flue gas circulating in the carbonization reactor.

The temperature of the carbonization reaction performed in the carbonization reactor 3 can be controlled by adjusting the temperature of the flue gas supplied to the carbonization reactor 3.

The temperature of the flue gas supplied to the carbonization reactor 3 may be about 800 to about 1200 ℃.

The temperature of the volatiles including the tar oil discharged from the carbonization reactor 3 may be about 150 to about 300 ℃. As described above, since the tar oil in the upper portion of the carbonization reactor 3 may be included in the volatile powder and discharged together with the flue gas, the temperature of the volatile matter including the tar oil discharged from the carbonization reactor 3 may be increased. It may correspond to the temperature of the top of (3).

When the temperature of the upper portion of the carbonization reactor 3 is adjusted to the above range, it is possible to prevent condensation of the volatiles by maintaining the boiling point or more of the volatiles. Thus, the yield of the tar oil 8 obtained by the tar condensation means 7 can be improved by preventing the condensation of volatile matter.

The flue gas discharged with the volatiles in the carbonization reactor 3 is removed from the heat exchanger 6 and optionally the tar condensation means 7 with the tar oil 8. In this process, the flue gas cooled by heat exchange may be delivered to the coolers 4 and 5 by the blower 13.

As described above, the dryer 1, the carbonization reactor 2, and the cooler 3 may be formed as a vertical retort device formed integrally with each other. It is formed in a structure in which the temperature decreases as it goes, and in order to obtain a volatile powder containing tar oil at a temperature in the above-described range, in the carbonization reactor (3) containing the tar oil at a height of about 150 to about 300 ℃ A discharge port for discharging volatile matter may be provided. The temperature of the upper portion of the outlet for discharging volatile matter containing the tar oil is further lowered, the vertical retort device may have a structure in which the dryer 1 is installed above the outlet.

For example, in the case of the vertical retort apparatus in which the dryer 1 and the carbonization reactor 2 are connected and have a height of about 10 m, the lower end of the carbonization reactor 2 is about 800 ° C. If it has a temperature of about, when the outlet is installed at a height of about 6 to 7m from the lower end of the vertical retort device, a volatile component containing tar oil having a temperature range of 150 to 300 ℃ to the heat exchanger (6) It can be easily discharged. That is, the one-piece vertical retort is composed of a drying part corresponding to the dryer 1 and a carbonization reaction part corresponding to the carbonization reactor 2, and is about 3 to about 3 from the upper part between the drying part and the carbonization reaction part. By providing a discharge port in the 4m high portion, volatile matter can be easily discharged to the heat exchanger 6 at about 150 to about 300 ℃. Accordingly, the volatile matter can be discharged to the heat exchanger 6 without being condensed by maintaining the temperature above the boiling point, thereby further increasing the yield of tar oil collected by the tar condensation means 7.

The coke obtained by carbonizing coal in the carbonization reactor 3 may be supplied to the coolers 4 and 5 and cooled, and then the coke 9 may be collected. The collection of coke 9 may be by coke collecting means (not shown).

The water stored in the water storage tank 12 may be transferred to the coolers 4 and 5 to quench or rehydrate the coke supplied to the coolers 4 and 5.

The coolers 4 and 5 may be formed in a two-stage structure of the first cooler 4 and the second cooler 5 to perform a two-stage cooling step.

Specifically, the coke delivered from the carbonization reactor 3 in the first cooler 4 is first cooled by the flue gas cooled in the heat exchanger 6 after being discharged from the carbonization reactor 3. Then, after being transferred to the second cooler (5), it can be secondarily cooled by the water supplied to the second cooler.

In the first cooler (4), the flue gas, on the contrary, recovers heat from the coke and enters the combustor (10), thereby absorbing the thermal energy of the high temperature coke after the carbonization process and reusing the coal for drying and carbonizing. can do.

The coke produced at the carbonization reaction temperature of about 500 to about 700 ° C. may be a high temperature of about 400 ° C. or more upon exiting the carbonization reactor 3, and when such high temperature coke comes into contact with oxygen, volatile matter and carbon in the coke may Reaction with oxygen causes an additional reaction, thereby adversely affecting the physical properties of the coke, which may result in a lower coke yield. In order to prevent this, it is necessary to quickly quench the coke obtained by the carbonization reaction to suppress further reactions, and it is advantageous to carry out the above two cooling steps to suppress such additional reactions.

The water discharged from the coolers 4 and 5 may be sent to the water storage tank 12, cooled again, and then introduced into the coolers 4 and 5 to be circulated. As such, it is possible to circulate the water so as not to use additional process water, and on the other hand, it does not generate waste water.

In addition, water condensed with moisture removed from the dryer 2 may be supplied to the coolers 4 and 5 and recycled.

1 shows a route in which water generated from raw coal is reused.

The raw material coal 1 of the high quality treatment method of coal may use not only high grade coal such as bituminous coal and sub-bituminous coal but also low grade coal such as lignite.

The high quality treatment method of coal is a low temperature carbonization process of coal by a direct heating method for low grade coal, such as lignite, by using a vertical retort device, by collecting the tar oil in high yield and recycling the thermal energy Energy-saving operation is possible.

In the case where the top of the retort is about 80 to about 100 ° C., the volatiles are condensed again when the volatiles generated from the flue gas and coal exit the top of the retort. In this case, the theoretical yield of tar oil obtained when using bituminous coal is only about 15 to about 20% by weight compared to dry coal, and even when used commercially, the yield of tar oil is only about 4 to about 5% by weight, and is known in the art. Even in low-grade coal such as lignite, it is very difficult to capture tar oil by more than about 5% by weight.

On the other hand, according to the high quality treatment apparatus of the coal and the high quality treatment method of the coal according to the present invention, at least about 5% by weight or more for low grade coal such as lignite, and about 10 for high grade coal such as bituminous coal. More than one percent by weight tar oil can be collected.

In particular, the yield of the tar oil may be improved by sufficiently cooling the tar oil included in the volatile matter discharged from the carbonization reactor by heat exchange with the cooled flue gas discharged from the dryer.

In addition, the high quality treatment apparatus of the coal and the high quality treatment method of the coal also achieve the effect of energy saving by recycling the flue gas to utilize the energy as described above with reference to Figs.

The solid product produced after the carbonization reaction must be cooled to suppress the secondary reaction, water can be used for quenching. When water is used as such process water, the water used for quenching may contain environmental pollutants, which may not be environmentally friendly. There may be a problem that energy utilization is not efficient.

The high quality treatment apparatus of the coal and the high quality treatment method of the coal, as described above with reference to Figure 1 and described above by recycling the water, transfer the heat energy from the hot coke to the flue gas to recycle the energy efficiently by utilizing energy efficiently Get the effect.

The following presents specific embodiments of the present invention. However, the embodiments described below are merely for illustrating or explaining the present invention in detail, and thus the present invention is not limited thereto.

(Example)

Example 1

After producing a high quality treatment system of coal having the same components as in FIG. 1, lignite was used as raw coal to obtain tar oil and coke. At the top of the carbonization reactor 3, an outlet for discharging volatile matter containing tar oil was installed. At this time, the temperature of the volatiles discharged from the outlet was 80-90 ℃. The components of the resultant obtained in the tar condensation means 7 were analyzed and described in Table 1 below.

Example 2

After producing a high quality treatment system of coal having the same components as in FIG. 1, lignite was used as raw coal to obtain tar oil and coke. An outlet for discharging volatile matter containing tar oil at the top of the carbonization reactor 3 was installed, but was installed at a lower position than the outlet of Example 1, and the temperature of the volatile discharged from the outlet was about 150 ° C. The components of the resultant obtained in the tar condensation means 7 were analyzed and described in Table 1 below.

Example 3

After producing a high quality treatment system of coal having the same components as in FIG. 1, lignite was used as raw coal to obtain tar oil and coke. At the top of the carbonization reactor 3, an outlet for discharging volatiles including tar oil was installed, but was installed at a lower position than the outlet of Example 2, and the temperature of the volatiles discharged from the discharger was 250 ° C. The components of the resultant obtained in the tar condensation means 7 were analyzed and described in Table 1 below.

Table 1 Outlet temperature Gas (wt%) Tar oil (wt%) Moisture (wt%) Coke (wt%) Example 1 80 ~ 90 ℃ 26.4 2.3 8.5 62.8 Example 2 150 ℃ 24.4 7.4 8.2 60.0 Example 3 250 ℃ 24.0 8.8 7.9 59.3

Referring to Table 1 above, it can be seen that at least 2.3 wt% of tar oil is obtained using the system according to the invention. That is, by using the system according to the present invention, energy for driving the system can be reduced without lowering the yield of tar oil. In particular, from the results of Table 1, in the carbonization reactor (3), the tar oil yield is about 7-9 wt% when the outlet is installed so that volatiles are discharged within the temperature range of 150-300 ° C as in Example 2-3. In comparison with Example 1, it can be confirmed that the tar oil can be obtained at a very high level of about 3 to 4 times.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of the invention.

[Description of the code]

1: raw coal 2: dryer

3: carbonization reactor 4: first cooler

5: second cooler 6: heat exchanger

7: Tar condensation means 8: Tar oil

9: coke 10: burner

11: condenser 12: water storage tank

13: blowing

Claims (20)

A dryer for supplying the heated flue gas to dry coal; A carbonization reactor for carbonizing the coal dried in the dryer; A cooler for cooling the coke produced from the carbonized coal; A condenser to condense the moisture mixed with the flue gas received from the dryer; And A heat exchanger for cooling the volatile matter containing tar oil discharged from the carbonization reactor using flue gas cooled in the condenser; High-quality treatment system of coal, including. The method of claim 1, Further comprising a combustor for producing a heated flue gas supplied to the dryer, The combustor is a high quality coal processing system for supplying flue gas heated to the carbonization reactor. The method of claim 2, Flue gas supplied to the carbonization reactor is cooled in the heat exchanger, The flue gas supplied to the cooler in the carbonization reactor is recycled to the combustor High quality treatment of coal. The method of claim 1, Further comprising a tar condensation means for condensing and collecting the cooled tar oil High-quality treatment system of coal, including. The method of claim 4, wherein Tar collecting means for collecting the tar oil condensed in the tar condensing means further comprises: Coal high quality treatment system. The method of claim 1, Water discharged from the cooler and water discharged from the condenser are supplied to the cooler again and recycled. Coal high quality treatment system. The method of claim 1, The flue gas supplied to the dryer is cooled in the condenser and then supplied to the heat exchanger, heated up, and then reintroduced into the dryer and recycled. High-quality treatment system of coal, including. The method of claim 7, wherein And a blower provided between the heat exchanger and the cooler to transfer the flue gas from the heat exchanger to the cooler. Coal high quality treatment system. The method of claim 1, The temperature of the volatile matter containing the tar oil discharged from the carbonization reactor is 150 to 300 ℃ Coal high quality treatment system. The method of claim 1, The carbonization reaction temperature of coal in the carbonization reactor is 500 to 700 ℃ Coal high quality treatment system. The method of claim 1, The temperature of the flue gas supplied to the carbonization reactor is 800 to 1200 ℃ Coal high quality treatment system. The method of claim 1, The vertical retort device formed by integrating the dryer, the carbonization reactor, and the cooler, wherein the carbonization reactor has a tar oil in a region where the temperature is lowered from the bottom of the vertical retort device and the temperature is 150 to 300 ° C. With a discharge port for discharging volatile matter containing Coal high quality treatment system. Supplying a heated flue gas into a dryer to dry coal; Condensing moisture mixed with flue gas from the dryer to remove water from the flue gas; Supplying the dried coal to a carbonization reactor, supplying a heated flue gas and carbonizing the coal by heat transferred therefrom to generate tar oil and coke; Discharging the tar oil produced in the carbonization reactor from the carbonization reactor and collecting the tar oil by heat exchange by contacting with the flue gas mixed with the water removed from the dryer and discharged and cooled together upon condensation of the water; And Transferring the coke produced in the carbonization reactor to a cooler to collect the coke; High quality treatment method of coal comprising a. The method of claim 13, The flue gas discharged and cooled together with the water removed from the dryer is further contacted with the tar oil discharged from the carbonization reactor, heat exchanged to increase the temperature and then supplied to the dryer. High quality treatment method of coal comprising a. The method of claim 13, When the generated tar oil is discharged from the carbonization reactor, flue gas is discharged together, and the flue gas discharged together with the moisture removed from the dryer is contacted with the cooled flue gas to be heat-exchanged to cool the cooler. Further comprising the step of supplying to High quality treatment of coal. The method of claim 15, And cooling the coke supplied to the cooler and then discharging the flue gas supplied to the cooler, and then heating the flue gas to the dryer or the carbonization reactor. The method of claim 13, The tar oil discharged from the carbonization reactor is a high-quality treatment method of coal is 150 to 300 ℃. The method of claim 13, The carbonization reaction temperature of the carbonization reactor is 500 to 700 ℃ high quality treatment method of coal. The method of claim 13, High-quality treatment method of coal, the temperature of the flue gas supplied to the carbonization reactor is 900 to 1200 ℃. The method of claim 13, Wherein the coke is first cooled by flue gas cooled in the heat exchanger after exiting the carbonization reactor, secondly cooled by water, and a two-stage cooling step is performed.

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