KR20050006676A - Apparatus for recovering heavy tar in fabrication process of coke - Google Patents

Abstract

PURPOSE: To provide an apparatus for preventing bulk heavy tar from sticking between the bottom of tar conveyor and chain, blocking generation of spark caused by strong friction between a vibro-mill and bulk heavy tar and preventing heavy tar from accumulating in heavy tar tank to efficiently recover heavy tar and improve operation efficiency. CONSTITUTION: The apparatus(100) for recovering heavy tar in coke manufacturing process comprises decanters(110,120,130,140) for separating heavy tar flown in along with ammonia liquor from coke oven; a heavy tar receiver(150) which is slantly installed to flow the mixture after mixing the heavy tar with benzol by receiving the heavy tar separated in the decanters, to a lower portion of which a separation plate is mounted adjacently to separate flowing heavy tar from bulk heavy tar, and in which downward pipes are branched off from the lower side of the separation plate to guide heavy tar passing through the separation plate; bulk heavy tar milling means connected to a lower portion of the heavy tar receiver to mill bulk heavy tar that could not pass through the separation plate; and a heavy tar tank(200) which contains heavy tar flown in through the downward pipes from the heavy tar receiver and heavy tar milled by the bulk heavy tar milling means and includes a benzol separating and discharging means for separating and discharging benzol contained in the heavy tar.

Description

Heavy tar recovery apparatus in coke manufacturing process {APPARATUS FOR RECOVERING HEAVY TAR IN FABRICATION PROCESS OF COKE}

The present invention relates to an apparatus for recovering heavy tar, which is a by-product generated in the process of producing coke in a coke oven, and more particularly, heavy tar is heavy by mixing and flowing benzene in a heavy tar discharged from a decanter. The present invention relates to a heavy tar recovery device capable of preventing work from being caught in a tar conveyor to increase work efficiency.

1 is a perspective view schematically illustrating a heavy tar recovery apparatus according to the prior art. Referring to FIG. 1, a flushing liquor decanter or washing liquid decanter (a flushing liquor decanter) through an ordinal inlet (13) with an ammonia liquor, also known as tar gas wastewater, is a by-product produced in a coke oven (not shown). 10 and 20), tar and ordination are separated from each other by specific gravity difference. The separated ordination is circulated back to the coke oven through the ordination outlet 14. Meanwhile, tar is separated into coal tar and heavy tar, and coal tar is transferred to the coal tar decanters 30 and 40 through the tar transfer pipe 15, and the heavy tar is accumulated in the lower portions of the washing liquid decanters 10 and 20.

The heavy tar accumulated in the lower portions of the washing liquid decanters 10 and 20 is scraped up by the scrapers 11 and 21 and falls on the chain 51 of the heavy tar conveyor 50 through the chutes 12 and 22. Meanwhile, a small amount of heavy tar is contained in the coal tar introduced into the coal tar decanters 30 and 40. The heavy tar is also separated from the coal tar and accumulated at the bottom of the coal tar decanters 30 and 40, and the coal tar only coal tar transfer pipe ( 33) is transferred to the coal tar storage tank (90). In addition, the heavy tar accumulated under the coal tar decanters 30 and 40 is scraped up by the scrapers 31 and 41 and dropped to the chain 51 of the heavy tar conveyor 50 through the chutes 32 and 42.

The chain 51 of the heavy tar conveyor 50 is driven by the upstream power motor 52 in the direction of the arrow A to load the heavy tar falling from the chute 12, 22, 32, 42 and downstream. The vibro-mill chute 60 is transported. The conveyed heavy tar is crushed by the high speed rotation (about 1780 rpm) of the Vibro mill 61 in the Vibro mill chute 60 and then introduced into the heavy tar tank 70 through the outlet tube 62 and stored. do. Inside the heavy tar tank 70, for example, a pair of stirrers 72a and 72b are installed to continuously rotate by the drive motors 71a and 72b mounted outside the tank 70 to prevent the solid tar from solidifying. do. In this way, the heavy tar stored in the heavy tar tank 70 is shipped to the consumer by the vehicle 80 or the like.

On the other hand, among the heavy tars flowing into the tar conveyor 50 from the washing liquid decanters 10 and 20 and the tar decanters 30 and 40, the bulk heavy tar stuck to the walls of the respective decanters 10, 20, 30 and 40. That is, heavy tar lumps are included. If the bulk heavy tar is caught between the bottom of the tar conveyor 50 and the chain 51, it may cause deformation of the bottom, which deforms the chain and cuts the chain connection. In this case, the conveyor 50 is not moved, and the motor 52 of the conveyor 50 causes damage and failure due to an overload.

In addition, when the bulk heavy tar flows into the vibro mill chute 60, sparks are generated by the strong friction between the vibro mill 61 and the solid mass heavy tar, which are rotating at a high speed (1780 rpm) during the grinding process, thereby causing the conveyor 50 ), The explosive toxic gases such as ammonia, carbon monoxide, benzol and hydrogen sulfide filled in the heavy tar tank 70 and the decanter 10-40 are often exploded. In addition, the heavy tars 73a, 73b, and 73c solidified in the remaining space except for the portion in which the stirrers 72a and 72b rotate inside the heavy tar tank 70 and the portion to be discharged to the vehicle 80 are accumulated. The problem that the function of 70 is deteriorated has also been pointed out.

Therefore, the present invention has been made to solve the above-described problems of the prior art, the object of the present invention is to prevent the bulk heavy tar caught between the bottom of the tar conveyor and the chain deformation of the bottom and chain and cutting of the chain connection To prevent damage and failure of the tar conveyor and its motors.

Another object of the present invention is to prevent the explosion of conveyors, heavy tar tanks and decanters by blocking the sparking caused by the strong friction of the vibro mill and the bulk heavy tar.

Still another object of the present invention is to prevent heavy tar from accumulating inside the heavy tar tank, thereby increasing the efficiency of the heavy tar recovery device.

1 is a perspective view schematically illustrating a heavy tar recovery apparatus of the prior art.

2 is a perspective view schematically illustrating a heavy tar recovery device of the present invention.

3 is an enlarged view of a portion of portion B of FIG. 2;

4 is a flowchart illustrating the operation of the heavy tar recovery device of the present invention.

<Explanation of symbols of main parts in drawings>

110, 120, 130, 140: Decanter 150: Heavy Tar Receiver

151, 152, 153, 154: Material pipe 160: Separator

170: vibration motor 172, 174: material pipe

200: heavy tar tank 230: grinder

300: condenser 400: benzol tank

404: benzol transfer pipe

Heavy tar recovery apparatus of the present invention for achieving the above object of the present invention comprises a decanter for separating the heavy tar introduced with the water from the coke oven; It is installed to be inclined to receive the heavy tar separated from the decanter and to mix and flow with the benzol, and is mounted adjacent to the bottom to separate the flowable heavy tar and the bulk heavy tar and guide the heavy tar passed through the separator plate. A heavy tar receiver with a down tube branched below the separator; Bulk heavy pulverizing means connected to the lower end of the heavy tar receiver to crush the bulk heavy tar that does not pass through the separation plate; And a benzol separation and discharge means for receiving the heavy tar introduced from the heavy tar receiver through the downcomer and the heavy tar pulverized by the bulk heavy tar crushing means, and separating and discharging the benzol contained in the heavy tar. It is characterized by including a heavy tar tank.

Various features and advantages of the present invention will be described in detail as follows in connection with the accompanying drawings.

FIG. 2 is a perspective view schematically illustrating a heavy tar recovery device of the present invention, and FIG. 3 is an enlarged partial cutaway view of part B of FIG. 2. 2 and 3, the heavy tar recovery apparatus 100 of the present invention is a pair of flushing liquor or washing liquid decanters (110, 120, decanter) and a pair for separating the heavy tar introduced with the water from the coke oven Coal tar decanter (130, 140) is provided. The washing liquid decanters 110 and 120 are ord separate the tar from the tar inside the decanter 110 and 120 and the ordinal inlet pipe 113 for accommodating the tar generated in the coke oven (not shown) with the ordination to the coke oven. The circulating water discharge pipe 114 is connected. The tar separated from the ordinal water is separated into coal tar and heavy tar in the washing liquid decanter (110, 120), and the washing liquid decanter (110, 120) is a tar conveying pipe (115) for supplying coal tar to the coal tar decanter (130, 140). It is connected to the coal tar decanter (130, 140) by.

Inside wash liquor decanters 110, 120, heavy tar separated from coal tar builds up on the floor. On the other hand, the coal tar transported to the coal tar decanter (130, 140) contains a small amount of heavy tar, such heavy tar is also separated from the coal tar and accumulated in the lower portion of the coal tar decanter (130, 140). Meanwhile, these coal tar decanters 130 and 140 are connected to the coal tar storage tank 190 through the coal tar conveying pipe 133, and the coal tar is transferred to the coal tar storage tank 190 through the coal tar conveying pipe 133.

Meanwhile, the cleaning liquid decanters 110 and 120 and the coal tar decanters 130 and 140 are scrapers 111, 121, 131, and 141 for scraping heavy tar accumulated on the bottom of the inside, and the heavy tar receiver 150 for scraped heavy tar. Discharge chutes 112, 122, 132, and 142 for discharging).

The heavy tar receiver 150 is a long tubular member extending below the discharge chute 112, 122, 132, 142 to accommodate heavy tar falling from the discharge chute 112, 122, 132, 142. Heavy tar receiver 150 is connected to the discharge chute 112, 122, 132, 142 by a flexible material pipe (151, 152, 153, 154), each of the benzol transfer pipe (404a, Benzol transported through 404b, 404c, 404d and sprayed through the corresponding nozzle (not shown) is mixed with the heavy tar contained in the heavy tar receiver 150 to form a flowable heavy tar so that the flowable heavy tar can flow. It is disposed inclined toward the discharge chute 112 from the discharge chute 142 side.

A vibration motor 170 is installed at the discharge chute 112 side of the heavy tar receiver 150, that is, downstream, to vibrate the entire heavy tar receiver 150 to promote the flow of the flowable heavy tar. In addition, the heavy tar receiver 150 is branched downward by downward pipes 171 and 173 near the vibration motor 170 and these downward pipes 171 and 173 are connected by intermediate flexible material pipes 172. It is connected to the mass heavy tar receiver 231 by the material pipe 174 in the position which passed the vibration motor 170. As shown in FIG. When the vibration motor 170 is operated by the material pipes 172 and 174, the heavy tar receiver 150 may vibrate smoothly.

On the other hand, at the bottom of the branch portion of the heavy tar receiver 150 and the downcomer 171, a flat, bulky tar separation plate 160 is disposed. The separator plate 160 includes a plurality of bars 161 extending in parallel, and the bars 161 are spaced apart from each other with a predetermined gap 162. In this case, the bulk heavy tar larger than the gap 162 is blocked by the separating plate 160 and flows to the bulk heavy tar receiver 231, and the liquid heavy tar passes through the gap 162 and is downwardly downward. It is conveyed to the heavy tar tank 200 through the tubes (171, 173).

The mass heavy tar receiver 231 accommodates the mass heavy tar 232 passing through the material pipe 174, and the mass heavy tar grinder 230 between the mass heavy tar receiver 231 and the heavy tar tank 200. Is installed, the tar mill 230 is connected to the lower heavy tar tank 200 by the down pipe 234. Outside the tar grinder 230, a grinder motor 250 and a reducer 240 for reducing the rotational speed of the motor 250 are provided. On the other hand, a tar level sensor 233 for measuring the level of the bulk heavy tar 232 therein is provided at a predetermined height of the bulk heavy tar receiver 231. The level sensor 233 is connected to the motor 250 by a signal line or control circuit shown in dashed lines, and the motor 250 is operated by a signal from the level sensor 233 so that the tar grinder 230 is bulky. It is possible to grind the bulk heavy tar 232 contained in the heavy tar receiver 231.

Downstream of such downward pipe (173, 234) is installed a heavy tar tank 200 for storing the heavy tar introduced. The heavy tar tank 200 is formed of a cylindrical housing for storing heavy tar, and is provided with a temperature maintaining means for maintaining a constant temperature of the stored heavy tar and a stirring means for stirring the stored heavy tar.

The temperature maintaining means includes a steam inlet pipe 201 for transferring steam supplied from a steam supplier (not shown), and the inside of the tar tank 200 to transfer heat of the introduced steam to the heavy tar inside the tar tank 200. The heat transfer pipe 202 is installed, and the steam discharge pipe 203 for returning steam back to the steam supply. The temperature maintaining means is connected by a thermometer 204 installed on the upper part of the tar tank 200, the thermometer 204 and a signal line (shown in dashed lines), and a signal transmitted from the thermometer 204 to the steam inlet pipe ( An on / off valve 205 for selectively opening / closing 201 and a control circuit (not shown) for controlling the operation of these thermometers 204 and on / off valves 205 are further included.

The stirring means is provided in the motor 220 installed on the upper side of the tar tank 200, the reducer 221 for reducing the speed of the motor 220, and the inside of the tar tank 200. It includes a rotary wing 222 that receives the force of rotation. The rotary vane 222 preferably has a length extending close to the inner wall of the tar tank 200 to agitate the entire heavy tar inside the tar tank 200. In this way, the entire heavy tar can be agitated to prevent the heavy tar from locally solidifying.

On the other hand, the benzol mixed with heavy tar and introduced into the tar tank 200 is present in the upper portion of the tar tank 200 by the difference in specific gravity (heavy tar 1.27, benzol 0.87), and as described above, the steam inlet and outlet tubes By adjusting the temperature in the tar tank 200 to approximately 80 to 90 ° C. by 201 and 203, the benzene in which the boiling point is 80.1 ° C. is evaporated. Accordingly, the tar tank 200 is further provided with a benzol vapor pipe 206 for transferring the benzene evaporated to the benzol condenser 300.

In addition, a discharge pipe 208 for discharging the stored heavy tar to a vehicle such as a vehicle 260 is provided below the tar tank 200.

The benzol condenser 300 receives the benzene in the vapor state through the gaseous benzol inlet pipe 301 connected to the above-mentioned benzol vapor pipe 206, and condenses the received gaseous benzol into liquid through cooling to form the liquid benzol discharge pipe 302. Transfer to the benzol tank 400 through. The benzol condenser 300 further includes a refrigerant inlet tube 303 and a refrigerant discharge tube 304 to circulate the refrigerant therein to cool the gaseous benzene. In addition, a benzol thermometer 305 for measuring the temperature of the liquid benzene is discharged is further installed on the outlet side of the benzol condenser 300, the temperature control valve for controlling the inflow of the refrigerant in accordance with the signal of the benzol thermometer 305 ( 306 is further installed at the refrigerant inlet side. The temperature control valve 306 is connected to the benzol thermometer 305 by a control circuit shown in dashed lines.

In this configuration, the internal pressure of the tar tank 200 is preferably controlled to about 70 to 80mmH ₂ O or less. In this case, due to the pressure of the gas generated in the decanter (110, 120, 130, 140) inside the heavy tar receiver 150 maintains a pressure of approximately 70 to 80mmH ₂ O and inside the condenser 300 condensation of gaseous benzene Due to the low pressure, vapor phase benzol vaporized in the tar tank 200 is naturally flowed toward the condenser 300 by the pressure difference.

Downstream of the condenser 300, a benzol tank 400 is provided. The benzol tank 400 includes a benzol pump 401 for pumping the benzol inside, and a benzol transport tube 404 for transporting the benzene in the heavy tar receiver 150. It is branched into two transfer tubes 404a, 404b, 404c, and 404d and connected to the heavy tar receiver 150.

A flow meter 403 and a flow control valve 404 are installed in the benzol delivery pipe 404 adjacent to the benzol pump 401, and the flow control valve 404 has a dotted line to adjust the flow rate according to the measurement value of the flow meter 403. Controlled by the illustrated control circuit.

Benzol tank 400 is connected to the benzol replenishment tube 405 for replenishing the consumed benzol, benzol replenishment pipe in accordance with the signal of the liquid level meter 406 and the liquid level meter 406 for measuring the amount of benzol stored therein A liquid level control valve 406 is provided to open and close 405. The liquid level control valve 406 is connected to the liquid level meter 406 by a control circuit shown in dashed lines.

Hereinafter, the operation of the heavy tar recovery apparatus of the present invention will be described with reference to FIGS. 2 and 3.

When heavy tar, including a small amount of bulk heavy tar, accumulates at the bottom of each decanter 110, 120, 130, 140, the scraper 111, 121, 131, 141 scrapes it up and chutes 112, 122, 132, 142. Into the heavy tar receiver 150 through). Since the receiver 150 is inclined from the coal tar decanter 140 toward the washing liquid decanter 110, the heavy tar naturally flows down from the high side to the low side, and since the viscosity of the heavy tar is about 2.5 to 3.0, the fluidity is good. It does not flow well.

Therefore, the organic solvent benzol is supplied to lower the viscosity to improve fluidity and flow well. As a result of the experiment, when 30 kg of benzene was mixed with 100 kg of heavy tar having a viscosity of 3.0, the viscosity of the heavy tar dropped to 1.3, and the fluidity was very good, and when the liquid tar mixture was added to the inclined pipe, it flowed naturally. Of course, the larger the inclination angle, the faster the flow rate.

That is, when the benzene is pumped by the benzol pump 401 from the benzol tank 400 to the heavy tar falling from the chute 112, 122, 132, 142, the flow rate control valve ( 402 is automatically operated to strongly inject the benzol through the nozzles of the benzol transfer pipes 404a, 404b, 404c, 404d, so that the viscosity of the heavy tar falls and the fluidity is very good so that the heavy tar flows well. do. In this case, since the heavy tar production amount is 200kg / hr, the amount of benzol used is 60kg / hr as a result of the experiment. This causes the heavy tar to be present in a mixed state of benzene.

The liquid heavy tar including the benzene flowed down flows into the gap 162 of the separating plate 160 and flows into the heavy tar tank 200 through the down pipes 171 and 173. On the other hand, a small amount of bulk heavy tar that does not pass through the gap 162 is separated from the separating plate 160 and flows into the bulk heavy tar receiver 231. At this time, the connection between the chute 112, 122, 132, 142 and the heavy tar receiver 150 is a material pipe (151-154), between the down pipe 171 and the down pipe 173 and the heavy tar receiver The material pipes 174 and 172 are also connected between the 100 and the bulk heavy tar receiver 231, and the connection portion between the benzol transfer pipes 404a-404d and the heavy tar receiver 150 is also connected to the material pipe. Therefore, when the vibration motor 170 is operated, the heavy tar receiver 150 is vibrated to the entire heavy tar receiver 150 so that the heavy tar flows better, and the bulk heavy tar is smoothly separated by the vibration from the separating plate 150 and the bulk heavy. It is introduced into the tar receiver 231.

In the heavy tar tank 200, when the rotary blade 222 inside the tank gradually rotates along the tank inner wall by the operation of the motor 220 and the deceleration action of the reducer 221 so that heavy tar does not accumulate in the lower portion, the rotary blade Since the space between 222 and the tank bottom and inner wall is very small, no heavy tar accumulates in any part of the tank.

Thus, when the heavy tar tank 200 is installed in a cylindrical shape, the space between the rotary wing and the tank bottom and the inner wall is the smallest when the rotary blade rotates to minimize the portion where the heavy tar can accumulate.

And, the internal temperature of the tank is adjusted by circulating the hot steam through the inlet pipe 201 and the discharge pipe 203, the internal temperature is adjusted to approximately 80 to 90 ℃. When the temperature of the thermometer 204 is set to 80 to 90 ° C, the temperature control valve 205 is automatically operated to adjust the temperature.

Heavy tar is present in a mixed state with benzol, i.e., with heavy tar dissolved in benzol. However, since heavy tar is 1.27, and benzol is 0.87, there is a difference in specific gravity, so that the heavy tar is beneath the tank 200, and a benzol acts to separate the upper tank. Thus, while stagnant inside the tank, the two materials naturally separate.

On the other hand, since the internal temperature of the heavy tar tank 200 is controlled to 80 to 90 ℃, benzene having a boiling point of 80.1 ℃ is separated from the heavy tar is present in the upper and then evaporated in the vapor state. Vapor phase gaseous benzol exits the heavy tar tank 200 through the benzol vapor tube 206 and enters the benzol condenser 300 through the gaseous benzol inlet 301. The gaseous benzol is cooled in the condenser 300 and condensed into liquid and recovered to the benzol tank 400 through the liquid benzol discharge pipe 302.

At this time, the pressure of the toxic gas generated in the decanter (110, 120, 130, 140) forms a pressure of approximately 70 to 80mmH ₂ O in the heavy tar receiver 150, the inside of the condenser 300 Since the pressure rapidly decreases due to condensation, when the internal pressure of the heavy tar tank 200 is managed to 70 to 80 mmH ₂ O or less, the benzol vapor is the heavy tar receiver 150, the heavy tar tank 200, and the condenser 300. Due to the pressure difference of the heavy tar out of the tank 200 to the condenser 300. As described above, since the benzene is separated from the heavy tar and exits, the heavy tar shipped by the vehicle 260 through the discharge pipe 208 installed under the heavy tar does not include the benzol component.

In the benzol condenser 300, the benzene is condensed by the refrigerant flowing into the inlet pipe 303 and discharged to the discharge pipe 304. The temperature control valve 306 is automatically operated according to the measured value of the thermometer 305 to introduce the refrigerant. Will be adjusted.

Meanwhile, when the bulk heavy tar separated from the liquid heavy tar in the separating plate 160 and introduced into the bulk heavy tar receiver 231 is stacked at the inlet of the grinder 230 and rises to the set upper limit level, the level sensor 233 Senses and the control circuit operates the motor 250 according to the sense signal. The rotation of the motor 250 is decelerated in the reducer 240 and transmitted to the grinder 230, and the grinder 230 grinds the bulk heavy tar by the low speed rotation of the mill, and then, through the downward tube 234, the heavy tar tank 200. ) In this way, when the bulk heavy tar is pulverized in the grinder 230 and the level of the bulk heavy tar receiver 231 falls to the lower limit set in the level sensor 233, the motor 250 is stopped by the control circuit. That is, the grinder is automatically operated according to the level of the bulk heavy tar of the mass heavy tar receiver.

As described above, the present invention prevents the bulk heavy tar from being caught between the bottom of the tar conveyor and the chain, thereby preventing deformation of the bottom and the chain and cutting of the chain connection, and preventing damage and failure of the tar conveyor and its motor. In addition, it prevents the explosion of the conveyor, heavy tar tanks and decanters by blocking the generation of sparks due to the strong friction between the mill and the bulk heavy tar with conventional vibrator. In addition, by preventing the accumulation of heavy tar inside the heavy tar tank, the efficiency of the heavy tar recovery device is increased.

Those skilled in the art will understand that various modifications and changes can be made in the present invention without departing from the scope of the invention as defined by the following claims and their equivalents.

Claims (7)

Decanters (110, 120, 130, 140, decanters) for separating heavy tars introduced with the water from coke ovens; The heavy tar separated from the decanter (110, 120, 130, 140) is installed to be inclined to mix and flow with the benzol, the separation plate 160 for separating the fluid heavy tar and the bulk heavy tar adjacent to the bottom is A heavy tar receiver 150 mounted and having branched down tubes 171 and 173 below the separator plate 160 to guide the heavy tar passing through the separator plate 160; A massive heavy tar crushing means (230, 231, 240, 250) connected to the lower end of the heavy tar receiver (150) for crushing the bulk heavy tar that does not pass through the separation plate (160); And The heavy tar, which is introduced from the heavy tar receiver 150 through the down pipes 171 and 173 and the heavy tar pulverized by the bulk heavy tar grinding means 230, 231, 240 and 250, is received. A heavy tar recovery apparatus, comprising a heavy tar tank (200) comprising a benzene separation separation means for separating and discharging the benzosol contained in the tar. The heavy tar recovery device according to claim 1, further comprising injection means (404a, 404b, 404c, 404d) for injecting benzol into the decanter (110, 120, 130, 140). According to claim 1, Condenser 300 for condensing the benzol discharged from the benzene separation and discharge means; And Heavy tar recovery device characterized in that it further comprises a benzol tank (400) for storing the liquid benzol condensed by the condenser and supplied to the heavy tar receiver (150). The apparatus of claim 1, further comprising: a motor (170) for vibrating the heavy tar receiver (150); And at least one material conduit (151-154, 172, 174) for connecting between said heavy tar receiver and a connection component. According to claim 1, wherein the tar tank 200 is Motor 220 installed on the tar tank 200, A reducer 221 for reducing the speed of the motor 220, and Heavy tar recovery device is installed in the tar tank 200, characterized in that it comprises a rotary blade 222 is rotated by receiving the force of the motor 220 by the reducer (221). According to claim 1, wherein the tar tank 200 is The thermometer 204 which is installed in the upper part of this tar tank 200, An on / off valve 205 connected to the thermometer 204 by a signal line to selectively open and close the steam inlet pipe 201 by a signal transmitted from the thermometer 204, and Heavy tar recovery device characterized in that it comprises a control circuit for controlling the operation of the thermometer (204) and the on-off valve (205). The method of claim 1, wherein the bulk heavy tar grinding means A massive heavy tar receiver 231 connected to the lower end of the heavy tar receiver 150 to receive the bulk heavy tar, The bulk heavy tar crusher 230 below the bulk heavy tar receiver 231, A motor 250 for generating a driving force for rotating the mass heavy tar receiver 231, and Heavy tar recovery device characterized in that it comprises a reducer (240) for reducing the rotation of the motor (250).