KR100332912B1 - Apparatus for seperating sludge from cleaning oil in B.T.X manufacturing unit - Google Patents

Abstract

PURPOSE: An apparatus for removal of sludge from crude light oil production installation is provided to effectively separate heavy sludge generated during distillation of B.T.X. after capturing and heating it. CONSTITUTION: The apparatus has a compartment plate(62) to separate inner space of a clean oil tank(60) and a waste oil tank(82) to overflow oil to discharge sludge from the clean oil tank(60) through an outlet connected to the waste oil tank(82). Another sludge outlet of the waste oil tank(82) is linked to a tar receiver(190) to treat tar and the sludge. The compartment plate(62) has inclined floor plates(64,65) to slope downward at both sides of its bottom end to smoothly discharge the oil and sludge through its output, and a filter at top end to remove impurities from the overflow oil. The floor plates(64,65) may have heating pipes to provide desired fluidity of the oil and sludge sufficient to discharge them outside.

Description

Apparatus for seperating sludge from cleaning oil in B.T.X manufacturing unit}

The present invention relates to an apparatus for producing landscape oil by capturing BTX contained in COG generated during coke production. More specifically, heavy sludge produced during the process of capturing, heating and distilling BTX from circulating oil The present invention relates to a sludge removal apparatus of a landscape oil manufacturing facility that can be separated and removed more effectively.

In general, COG generated during the coking of coal by coking contains about 40 g of B.T.X (benzene, toluene, xylene) per Nm 3, which is collected, heat exchanged, and distilled to produce landscape oil.

The landscaping oil production process according to the prior art, as shown in Figure 1, is equipped with a BTX collection tower 110 to be discharged to the upper side COG is introduced to the lower side, the BTX collection tower 110 in the Absorbing Oil (Absorbing Oil) Is sprayed from the top to the bottom to collect the BTX from the COG falls to the bottom, and thus the BTX (Benbenh + BTX) collected BTX is transported to the Ben U oil tank (120).

The ben-yu contained in the ben-yu tank 120 is heated while condensing the high-temperature BTX steam discharged from the upper portion of the BTX distillation column 150 while passing through the condenser 130 for heat exchange with the BTX steam. While passing through the preheater 132 for heat exchange between the Benben oil and the talben oil, the temperature is raised to 170 ° C. or higher while exchanging heat with the high talbenven oil discharged from the bottom of the BTX distillation column 150.

The heated Benben oil is passed through the heating furnace 140 before being introduced into the upper portion of the BTX distillation column 150 and undergoes a final temperature raising process by combustion of COG. The high temperature and high pressure superheated steam is distilled to extract the BTX from the oil containing.

The BTX oil extracted from the BTX distillation column 150 is converted to the debend oil and discharged to the lower side of the BTX distillation column 150 at a high temperature (180 ° C.), and passes through the preheater (132) and the oil contained therein. After being cooled by the heat exchanger of the BTX collection tower 110 by being cooled to room temperature by the heat exchange with the coolant supplied from the cooling tower 136 while continuing to pass through the cooler 134 and then transferred to the debenture tank (180). ) It is sprayed to the upper side and continuously circulated for BTX capture.

Meanwhile, heat exchangers such as the cooler 134, the preheater 132, and the condenser 130, which continuously heat and cool the talben oil and the benben oil, perform cleaning by washing oil to increase the heat exchange efficiency after a certain time of operation. This is carried out periodically, and the cleaning oil in the cleaning oil tank 160 as shown in FIG. 2 is introduced into the cooler 134, the preheater 132, and the condenser 130 through the cleaning oil pump 162. By removing the heavy sludge and foreign matter deposited in the carbon component during operation, the cleaning oil is charged into the charging inlet 164, and then stays and discharges to the cleaning oil outlet 166 to perform the cleaning operation. .

After the cleaning operation is completed, the washing oil stagnated inside the heat exchangers is discharged to the waste oil tank 182 through the drain pipe of the heat exchangers, and the waste oil tank 182 is cleaned as shown in FIG. 2. It has the same structure as the oil tank 160, the oil and the sludge is separated from each other by the specific gravity difference (0.8: 1.34) of oil and sludge in the inside, the oil of the upper portion of the waste oil tank 182 separated in this way is pumped to While it is introduced into the talben oil tank 180 is used for BTX capture, the sludge of the lower layer of the waste oil tank 182 is accumulated.

Here, reference numeral 170 denotes a manhole, 172 denotes a level gauge, 174 denotes a drain port, and 176 denotes a heater for heating.

However, in the landscaping oil production process according to the prior art, the washing oil tank 160 and the waste oil tank 182, which have a lot of stagnant heavy carbon sludge in the circulating oil, have a general tank structure and thus have a large specific gravity difference. The sludge is separated from inside the tank, and the heavy sludge is accumulated at the bottom of the tank, and the oil of the upper portion of the tank having a low specific gravity is discharged through the tank outlet 166 and discharged along with the sludge deposited by the suction pressure of the pump. Since the sludge deposition level in the washing oil tank 160 and the waste oil tank 182 is gradually increased, the sludge content in the entire landscaping oil manufacturing process is continuously increased due to the sludge flowing out through the tank outlet 166. To increase the BTX capture rate and distillation rate, as well as the closure of facilities and piping, reducing the amount of landscape oil production and heat exchange effect. This factor for many problems, including deterioration caused by hamben COG COG combustion quantity increased and refined quality degradation for all yuseung was being.

The present invention is to solve such a conventional problem, a tank that can effectively treat the carbon-based heavy sludge generated during the process of producing landscape oil from COG to effectively separate from the oil circulated continuously in the landscape oil manufacturing process It is an object of the present invention to provide a sludge removal apparatus for diesel production equipment.

1 is a schematic view showing a landscape oil manufacturing equipment according to the prior art

Figure 2 is an external perspective view showing a tank to temporarily accommodate the sludge is equipped in the landscape oil production equipment according to the prior art

Figure 3 is a schematic block diagram showing a landscape oil production equipment equipped with a sludge removal apparatus according to the present invention

Figure 4 is an external perspective view showing a tank to temporarily accommodate the sludge provided in the landscape oil production equipment according to the present invention

Figure 5 is an external perspective view showing a separator plate provided on the tank for sludge water of the present invention

Figure 6 is an external perspective view showing a filter provided on the tank for sludge water of the present invention

Figure 7 is an external perspective view showing an oil filler equipped on the tank for sludge water of the present invention

Figure 8 is an external perspective view showing a heating pipe provided on the tank for sludge water of the present invention.

Explanation of symbols on the main parts of the drawings

60 ... Cleaning Oil Tank

62 ... Separator

64,65 ... inclined bottom plate

66 ... heating piping

68 ... filter

70 ... oil filler

82 ... Waste Oil Tank

110 ... B.T.X collection tower

150 ... B.T.X Distillation Column

As a technical configuration for achieving the above object, the present invention, BTX is collected from the COG by the Benham oil is distilled in a distillation column through a heat exchanger and a heating furnace is produced as landscape oil, the heat exchanger is a cleaning oil for increasing heat exchange efficiency The oil is periodically cleaned by the cleaning oil circulated from the tank, and the waste oil drained from the heat exchanger is supplied to the waste oil tank, and the oil is separated from the waste oil tank to collect BTX from COG via a debend oil tank. In the landscape oil manufacturing equipment to be used, the cleaning oil tank and the waste oil tank are separated by a separator to allow the overflow of oil, the sludge discharge port of the cleaning oil tank is connected to the waste oil tank The sludge is discharged into the waste oil tank, and the sludge discharge port of the waste oil tank is tar and sludge. The sludge removal apparatus of the tank via the production facility according to claim connected to a receiver for processing the tar by maryeonham.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 3 is a schematic view showing a landscape oil production process with a sludge removal apparatus according to the present invention, the approximate process for the production of landscape oil is similar to that of Figure 1 described as a prior art description of that part Will be omitted, the present invention is to change the structure of the cleaning oil tank 60 and the oil tank 82, which is installed in the center of the separation membrane 62 vertically as shown in Figure 4 And the left and right spaces are separated, and the inclined bottom plates 64 and 65 are formed on both sides of the lower end of the separation membrane 62 so as to be inclined further down the separation membrane 62. Each is installed, and the heating pipes 66 for heating are respectively installed on the lower surfaces of the inclined bottom plates 64 and 65.

In addition, as shown in FIG. 5, a recess 63 is formed in a central upper portion of the separator plate 62 so that the filter 68 as shown in FIG. 6 is detachably assembled. .

An oil filler 70 is installed at the upper side of the cleaning oil tank 60 and the peoil tank 82 to allow the oil to fall to the inclined bottom plate 64 in the tanks 60 and 82. Outlets 166 and 166a are formed on the inclined bottom plates 64 and 65, respectively, and drain holes 174 are provided on the inclined bottom plates 65, and the outlets are provided on the inclined bottom plates 64. Level switches 72 and 72a are provided at positions slightly higher than 166a, respectively.

Further, sludge conveyance vacuum pumps 12 and 12a are provided on the inlet 166a outlet pipes 166a and 10a, respectively, and suctions are provided on the front and rear sides of the vacuum pumps 12 and 12a. Electric valves 14 and 14a for discharge and electric valves 15 and 15a for discharge are respectively provided.

In the above, the pipe 10 of the outlet 166a side of the cleaning oil tank 60 is connected to the drain pipe side of the heat exchangers and connected to the oil filler 70 of the waste oil tank 82, and the waste oil tank 82. The pipe 10a on the outlet 166a side of the c) is connected to a tar receiver 190 that separates the tar and the sludge.

In addition, the oil charge unit 70 is divided into a plurality of paths as shown in Figure 7, each branch pipe end is blocked by a fluid flow discharged from each of them to lower the pressure and speed, etc. It is preferable that 71 are respectively provided, and the fluid discharge port 71a is formed radially.

In addition, the heating pipe 66 is preferably formed in a zigzag path, as shown in Figure 8 so as to evenly heat the inclined bottom plate 64, 65.

According to the present invention having the above-described configuration, as shown in FIG. 3, the heat exchanger cleaning oil and the oil drained from each facility contain heavy carbon sludge in the cleaning oil tank 60 and the waste oil tank 82. It is charged through the oil charge unit 70 while the oil charge unit 70 is divided into several branches and equipped with a blocking plate 71 to relieve pressure and flow rate during charging, and the cleaning oil and waste oil loaded therethrough are The upper space of the inclined bottom plate 64 separated by the separator diaphragm 62 is filled.

Here, the cleaning oil and the waste oil are separated and separated by the specific gravity, and the sludge having a large specific gravity accumulates in the lower layer, and the oil having a lower specific gravity in the upper layer passes through the filter 68 when the oil is filled higher than the set height. And the foreign matter is filtered and overflowed to the upper space of the inclined bottom plate 66 is stored.

On the other hand, the inclined bottom plates 64 and 65 are heated by a heating medium flowing into the heating pipe 66 so that sludge and retaining oil do not harden and maintain proper fluidity. Then, the bottom plates 64 and 65 are kept in the inclined state, and the sludge and oil existing thereon are in a state of sliding down toward the outlet 166.

The cleaning oil stayed on the upper side of the inclined bottom plate 65 is discharged through the oil outlet 166, and the cleaning oil in the cleaning oil tank 60 is cooled by the cooler 134, the preheater 132, through the outlet 166. It is continuously circulated to a heat exchanger such as a condenser 130, the oil in the waste oil tank 82 is sent to the debend oil tank 180 through the outlet 166 to be continuously used for BTX capture.

On the other hand, the sludge that is separated and accumulated in the upper portion of the inclined bottom plate 64 is discharged through the sludge discharge port 166a, and in particular, the sludge in the cleaning oil tank 60 is detected by the level switch 72. The level switch 72 detects the specific weight of the sludge as is commonly used and this specific gravity is calculated to output the sludge level value.

The sludge level in the cleaning oil tank 60 is managed at a high level and a low level, and when the level is high, the suction power valve 14 is opened and the suction motor valve 14 is fully opened. At the same time, the sludge discharge vacuum pump 12 is started and the discharge electric valve 15 is gradually opened after a predetermined time by the timer setting after the sludge discharge vacuum pump 12 is started, and the sludge is discharged to the waste oil tank 82. Will be discharged. When the sludge level in the washing oil tank 82 drops to low after discharge of the sludge, the discharge electric valve 15 installed at the rear end of the sludge discharge vacuum pump 12 is operated to close and the discharge electric valve 15 is completely closed. Simultaneously with the operation, after the sludge discharge vacuum pump 12 is stopped, the suction electric valve 14 is gradually closed by a timer setting after a predetermined time.

In addition, the sludge in the waste oil tank 82, where the amount of heavy sludge is present more than the cleaning oil tank 60, is detected by the level switch 72a. As a result, when the high level is reached, the suction power valve 14a is opened, the sludge discharge vacuum pump 12a is started at the same time as the suction motor valve 14a is fully opened, and the timer after the start of the sludge discharge vacuum pump 12a is started. After a predetermined time by setting the discharge electric valve (15a) is gradually opened to discharge the sludge to the tar receiver 190 for separating the tar and the sludge tar and heavy sludge separation equipment. When the sludge level in the cleaning oil tank 82a drops to low after discharge of the sludge, the discharge electric valve 15a installed at the rear of the sludge discharge vacuum pump 12a is operated to close and the discharge electric valve 15a is completely closed. Simultaneously with the operation, after the sludge discharge vacuum pump 12a is stopped, the suction electric valve 14a is gradually closed by a timer setting.

As described above, according to the sludge removal apparatus of the landscape oil manufacturing equipment according to the present invention, the heavy carbon-based sludge generated during the process of producing the landscape oil by capturing BTX is separated from the cleaning oil tank and the waste oil tank. It is possible to solve the problem that the equipment (heat exchanger, tanks, collection tower) and piping caused by the sludge was closed, and the BTX collection rate is improved as well as the COG quality is improved.

In addition, the COG consumption is reduced by improving the heat exchange efficiency, and the landscaping oil production is also improved, and in addition, there is an effect of preventing the air pollution by reducing the emission of harmful substances discharged during COG combustion.

Claims (5)

The BTX collected by CO2 from benzene is distilled in the distillation column 150 through a heat exchanger and a heating furnace to be produced as landscape oil. The heat exchanger is periodically cleaned by rinsing oil circulated from the rinsing oil tank to increase heat exchange efficiency. In the landscaping oil manufacturing equipment, the waste oil drained from the heat exchanger is supplied to the waste oil tank, and the oil is separated from the waste oil tank to be used for BTX capture from COG via a debend oil tank. The cleaning oil tank 60 and the waste oil tank 82 are separated by a separator plate 62 so that oil can overflow, and the sludge discharge port of the cleaning oil tank 60 is a waste oil tank ( 82 is connected to the discharge of the sludge to the waste oil tank 82, the sludge discharge port of the waste oil tank 82 is connected to the tar receiver 190 for treating tar and sludge landscaping oil manufacturing equipment, characterized in that Sludge removal device. The separation oil plate (62) of the cleaning oil tank (60) and the waste oil tank (82) is provided with an inclined bottom plate (64) (65) which forms a downward slope to the outlet side on both sides of the lower end portion. Sludge removal apparatus of landscape oil manufacturing equipment, characterized in that the oil and sludge is discharged smoothly through the outlet. The sludge removal apparatus of the landscaping oil manufacturing equipment according to claim 2, wherein the inclined bottom plates (64) (65) are provided with a heating pipe (66) to impart fluidity to be easily discharged to oil and sludge. . The cleaning oil tank (60) and the waste oil tank (82) are each provided with level switches (72) (72a) for sensing the level of sludge, and at the level switches (72) (72a), respectively. Sludge removal apparatus of landscape oil manufacturing equipment, characterized in that the sludge is automatically discharged by operating the outlet motor when the detected sludge level is greater than the set value. The tank according to claim 1, wherein the separation membrane (62) of the cleaning oil tank (60) and the waste oil tank (82) has a filter (68) at its upper end to remove impurities from the overflowed oil. Sludge removal device of diesel production equipment.

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