Tar condenser, tar condensation system and tar condensation method

Abstract

The invention discloses a tar condenser, a tar condensation system and a tar condensation method. The tube bundle of the tar condenser is located in a shell, and sequentially penetrates a pretreatment chamber, a steam superheating chamber, an evaporation chamber and an oil-gas separation chamber. The top of the tube bundle is spaced from the inner wall of the top of the pretreatment chamber, and the distance from the bottom of the pretreatment chamber is 50d-100d; the pretreatment chamber is provided with an air inlet pipe; the steam superheating chamber is provided with a saturated steam inlet and a superheated steam outlet; the evaporation chamber is provided with a water inlet pipe and a saturated steam outlet; the saturated steam outlet is connected to the saturated steam inlet; the oil-gas separation chamber is provided with an air outlet pipe and a tar outlet pipe; the tar condenser is also provided with a pressure differential transmitter for measuring the pressure difference before and after the oil-containing pyrolysis gas enters the tube bundle, and transmits the pressure differential signal to a pressure differential controller; the pressure differential controller acts on a flow actuator provided on the water inlet pipe to maintain the pressure difference at (1-1.5)p. The tar condenser, the tar condensation system and the tar condensation method are resistant to blockage.

Description

Technical Field

[0001] The invention relates to a tar condenser, a tar condensation system and a tar condensation method. Background Art

[0002] my country's energy reserve structure is rich in coal, less in gas and poor in oil. The multi-generation technology of first pyrolysis to obtain low-cost gas and tar, and then sending the remaining semi-coke to boilers for combustion to generate electricity will greatly improve the level and value of coal resource utilization and alleviate the shortage of oil and gas supply in my country.

[0003] The oil-gas separation process of high-temperature oil-containing pyrolysis gas is one of the key technologies for the preparation of pyrolysis tar and fuel gas. The tar condenser is a key equipment of the system, and its operating status directly affects the long-term operation of the system. At present, the dust-containing and oil-containing high-temperature pyrolysis gas produced from the pyrolysis furnace is generally condensed and recovered by direct spraying process after the dust removal process such as cyclone, bag, and electric capture, so as to achieve the separation of fuel gas and tar, and then achieve the recovery of tar.

[0004] However, due to the complex composition of tar and the wide distribution of molecular weight, the conventional single-stage condenser cannot achieve oil classification and heat recovery. In addition, due to the large difference in fluidity of different tar components during the condensation process, the single-stage condenser is blocked during operation, which seriously affects the normal operation of the oil and gas separation process.

[0005] The inventor of the present invention has found in research that if the existing multi-stage tube-in-tube condenser is used, multiple cooling media must be used. In addition, the oil-containing pyrolysis gas flows through the tube side, and the cooling medium flows through the shell side, so the temperature of the inner wall of the tube is equivalent to the temperature of the cooling medium. In this way, the temperature of the tar in contact with the inner wall of the tube is equivalent to the cooling medium, which makes the fluidity of the tar worse, causing blockage. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a new type of tar condenser, tar condensation system and tar condensation method in order to overcome the defect that the existing single-stage condenser and multi-stage condenser will be blocked when used for condensing oil-containing pyrolysis gas. The tar condenser, tar condensation system and tar condensation method of the present invention are resistant to blockage and only use one cooling medium. In addition, the tar condenser of the present invention has a simple structure; the tar condensation system and tar condensation method of the present invention can realize the classification of oil products and the step-by-step heat recovery.

[0007] The tar condenser of the present invention essentially achieves pipeline blockage by adjusting the heat exchange area of ​​the cold and hot fluids in the evaporation chamber. In the prior art, for a specific device, when faced with blockage, the technicians in this field usually solve the blockage by adjusting the flow and temperature of the cold and hot fluids without changing the heat exchange area. However, the method of adjusting the flow and temperature of the cold and hot fluids is not only complicated, but also can only solve the blockage problem after the blockage occurs. It cannot take action in advance before the blockage occurs, unlike the present invention, to avoid the occurrence of blockage.

[0008] The present invention solves the above technical problems through the following technical solutions:

[0009] The present invention provides a tar condenser, which comprises a shell and a tube bundle; the interior of the shell is divided into a pretreatment chamber, a steam superheating chamber, an evaporation chamber and an oil-gas separation chamber in sequence from top to bottom by a partition; the tube bundle is located inside the shell, and the tube bundle passes through the pretreatment chamber, the steam superheating chamber, the evaporation chamber and the oil-gas separation chamber in sequence, and there is a distance between the top of the tube bundle and the top inner wall of the pretreatment chamber, and the distance between the top of the tube bundle and the bottom surface of the pretreatment chamber is 50d-100d, wherein d is the nominal diameter of each tube of the tube bundle; the pretreatment chamber is provided with an air inlet pipe for inputting oil-containing pyrolysis gas; the steam superheating chamber is provided with a saturated steam inlet and a superheated steam outlet; the The evaporation chamber is provided with a water inlet pipe for inputting boiler water and a saturated steam outlet; the saturated steam outlet is connected to the saturated steam inlet; the oil-gas separation chamber is provided with an outlet pipe for outputting purified gas and a tar outlet pipe for outputting tar; the tar condenser is also provided with a differential pressure transmitter, the differential pressure transmitter is used to measure the pressure difference between the oil-containing pyrolysis gas before entering the tube bundle and after exiting the tube bundle, and transmit the pressure difference signal to the differential pressure controller; the differential pressure controller acts on the flow actuator arranged on the water inlet pipe to adjust the flow of boiler water entering the evaporation chamber and maintain the pressure difference at (1-1.5)p, wherein p is the pressure difference between the oil-containing pyrolysis gas before entering the tube bundle and after exiting the tube bundle measured by the differential pressure transmitter during normal operation.

[0010] The tar condenser can be used to process conventional oil-containing pyrolysis gas in the art (that is, oil-containing pyrolysis gas containing high-distillation range, middle-distillation range and low-distillation range tar).

[0011] In the present invention, preferably, the distance between the top of the tube bundle and the bottom of the pretreatment chamber is 50d-75d, more preferably 75d.

[0012] In the present invention, the tar condenser is preferably provided with a sewage discharge pipe, and the sewage discharge pipe is arranged on the bottom side wall of the pretreatment chamber.

[0013] In the present invention, the saturated steam inlet is preferably arranged on the bottom side wall of the steam superheating chamber, and the superheated steam outlet is preferably arranged on the top side wall of the steam superheating chamber.

[0014] In the present invention, preferably, the pressure difference controller acts on a flow actuator provided on the water inlet pipe to adjust the flow of boiler water entering the evaporation chamber and maintain the pressure difference at (1-1.2)p, more preferably p.

[0015] In the present invention, the differential pressure controller preferably also has display and alarm functions.

[0016] In the present invention, the water inlet of the water inlet pipe is preferably arranged on the bottom side wall of the evaporation chamber, and the saturated steam outlet is preferably arranged on the top side wall of the evaporation chamber.

[0017] In the present invention, the evaporation chamber may also be provided with a liquid level meter, and the liquid level meter is used to measure the liquid level of the evaporation chamber and transmit the liquid level signal to the liquid level indication alarm.

[0018] In the present invention, preferably, the water inlet pipe is also provided with a flow meter and a flow indicating alarm.

[0019] In the present invention, preferably, the lower part of the oil-gas separation chamber is a tar storage area, the bottom of the tube bundle extends to the tar storage area, and the outlet of the outlet pipe is located above the tar storage area. In this way, the gas discharged from the bottom of the tube bundle is first washed in the tar storage area and then discharged through the outlet and the outlet pipe. More preferably, the oil-gas separation chamber is also provided with a liquid level gauge, which is used to measure the liquid level of the oil-gas separation chamber and transmit the liquid level signal to the liquid level indication control alarm to control the liquid level to be higher than the bottom of the tube bundle.

[0020] In the present invention, preferably, the tar outlet pipe is also provided with a flow meter and a flow indicating alarm.

[0021] In the present invention, preferably, a thermometer and a temperature indicating alarm are also provided on the air outlet pipe.

[0022] The present invention also provides a tar condensation system, which comprises a plurality of the above-mentioned tar condensers arranged in series. The tar condensation system can obtain tars of different distillation ranges.

[0023] In the present invention, the number of the tar condensers may be, for example, 2-4, or 3.

[0024] In the present invention, the series connection refers to that the air outlet pipe of the previous stage tar condenser is connected to the air inlet pipe of the next stage tar condenser.

[0025] The present invention also provides a tar condensation system, which includes a tar condenser I, a tar condenser II and a tar condenser III arranged in series; wherein the tar condenser I is the aforementioned tar condenser, and the tar condenser II is not provided with the steam superheating chamber on the basis of the tar condenser I; and the tar condenser III is not provided with the steam superheating chamber and the evaporation chamber on the basis of the tar condenser I.

[0026] In the present invention, the series connection means that the outlet pipe of the tar condenser I is connected to the inlet pipe of the tar condenser II, and the outlet pipe of the tar condenser II is connected to the inlet pipe of the tar condenser III.

[0027] The present invention also provides a tar condensation method using the above-mentioned tar condensation system, wherein the oil-containing pyrolysis gas is fed into the air inlet pipe of the first-stage tar condenser, and the oil-containing pyrolysis gas flows out from the air outlet pipe of the last-stage tar condenser.

[0028] When the number of tar condensers in the tar condensation system is 3, the temperature of the gas in the outlet pipe of the first-stage tar condenser is preferably controlled to be 350-500° C., more preferably 450° C. The temperature of the gas in the outlet pipe of the second-stage tar condenser is preferably controlled to be 200-300° C., more preferably 250° C. The temperature of the gas in the outlet pipe of the third-stage tar condenser is preferably controlled to be 50-200° C., more preferably 150° C.

[0029] When the number of tar condensers in the tar condensation system is 3, it is preferred to control the temperature of the gas in the outlet pipe of the first-stage tar condenser to 450°C; control the temperature of the gas in the outlet pipe of the second-stage tar condenser to 250°C; and control the temperature of the gas in the outlet pipe of the third-stage tar condenser to 150°C.

[0030] Without violating the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0031] The reagents and raw materials used in the present invention are commercially available.

[0032] The positive and progressive effects of the present invention are: the tar condenser and tar condensation system of the present invention are resistant to blockage and use only one cooling medium. In addition, the tar condenser of the present invention has a simple structure; the tar condensation system and tar condensation method of the present invention can achieve oil classification and heat graded recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of a tar condenser according to an embodiment of the present invention.

[0034] Figure 2It is a schematic structural diagram of a tar condensation system according to an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] Housing 10

[0037] Pretreatment Room 101

[0038] Steam superheat chamber 102

[0039] Evaporation chamber 103

[0040] Oil and gas separation chamber 104

[0041] Tube bundle 20

[0042] Intake pipe 30

[0043] Exhaust pipe 40

[0044] Tar outlet pipe 50

[0045] Differential pressure transmitter 60

[0046] Differential pressure controller 70

[0047] Flow actuator 80

[0048] Liquid level meter 90

[0049] Liquid level indicator alarm 100

[0050] Liquid level indication control alarm 110

[0051] Flow meter 120

[0052] Flow indicator alarm 130

[0053] Thermometer 140

[0054] Temperature indicator alarm 150

[0055] Tar condenser I160

[0056] Tar Condenser II 170

[0057] Tar Condenser III 180 DETAILED DESCRIPTION

[0058] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples. The experimental methods in the following examples without specifying specific conditions are carried out according to conventional methods and conditions, or selected according to the product specifications.

[0059] Generally speaking, the oil-containing pyrolysis gas contains about 10% tar (coal-based), and this value means that the tar in the oil-containing pyrolysis gas accounts for 10% by mass of the coal that produces the above-mentioned oil-containing pyrolysis gas; in the following embodiments, the high distillation range (boiling point>450°C) tar yield (coal-based) refers to the mass percentage of the obtained high distillation range tar in the coal that produces the above-mentioned oil-containing pyrolysis gas; the medium distillation range (250°C<boiling point≤450°C) tar yield (coal-based) refers to the mass percentage of the obtained medium distillation range tar in the coal that produces the above-mentioned oil-containing pyrolysis gas; the low distillation range (150°C<boiling point≤250°C) tar yield (coal-based) refers to the mass percentage of the obtained medium distillation range tar in the coal that produces the above-mentioned oil-containing pyrolysis gas; the light oil (50°C<boiling point≤150°C) tar yield (coal-based) refers to the mass percentage of the obtained light oil in the coal that produces the above-mentioned oil-containing pyrolysis gas.

[0060] Table 1 Properties of raw coal

[0061]

[0062]

[0063] Example 1

[0064] (1) Tar condenser

[0065] like Figure 1 The tar condenser shown in the figure comprises a shell 10 and a tube bundle 20; the interior of the shell 10 is divided into a pretreatment chamber 101, a steam superheating chamber 102, an evaporation chamber 103 and an oil-gas separation chamber 104 from top to bottom; the tube bundle 20 is located inside the shell 10, and the tube bundle 20 sequentially passes through the pretreatment chamber 101, the steam superheating chamber 102, the evaporation chamber 103 and the oil-gas separation chamber 104, and there is a distance between the top of the tube bundle 20 and the top inner wall of the pretreatment chamber 101, and the distance between the top of the tube bundle 20 and the bottom of the pretreatment chamber 101 is 75d, where d is the nominal diameter of each tube of the tube bundle 20; the pretreatment chamber 101 is provided with an air inlet 30 for inputting oil-containing pyrolysis gas; the steam superheating chamber 102 is provided with a saturated steam inlet and a superheating chamber 103; Hot steam outlet; the evaporation chamber 103 is provided with a water inlet pipe for inputting boiler water and a saturated steam outlet; the saturated steam outlet is connected to the saturated steam inlet; the oil-gas separation chamber 104 is provided with an outlet pipe 40 for outputting purified gas and a tar outlet pipe 50 for outputting tar; the tar condenser is also provided with a differential pressure transmitter 60, the differential pressure transmitter 60 is used to measure the pressure difference before the oil-containing pyrolysis gas enters the tube bundle 20 and after it exits the tube bundle 20, and transmits the pressure difference signal to the differential pressure controller 70; the differential pressure controller 70 acts on the flow actuator 80 arranged on the water inlet pipe to adjust the flow of boiler water entering the evaporation chamber 103 and maintain the pressure difference at p, wherein p is the pressure difference before the oil-containing pyrolysis gas enters the tube bundle 20 and after it exits the tube bundle 20 measured by the differential pressure transmitter 60 during normal operation.

[0066] The tar condenser is provided with a sewage discharge pipe, and the sewage discharge pipe is arranged on the bottom side wall of the pretreatment chamber 101 .

[0067] The saturated steam inlet is arranged on the bottom side wall of the steam superheating chamber 102 , and the superheated steam outlet is arranged on the top side wall of the steam superheating chamber 102 .

[0068] The differential pressure controller 70 also has display and alarm functions.

[0069] The water inlet of the water inlet pipe is arranged on the bottom side wall of the evaporation chamber 103 , and the saturated steam outlet is arranged on the top side wall of the evaporation chamber 103 .

[0070] The evaporation chamber 103 is also provided with a liquid level meter 90 , which is used to measure the liquid level of the evaporation chamber 103 and transmit the liquid level signal to the liquid level indication alarm 100 .

[0071] The water inlet pipe is also provided with a flow meter 120 and a flow indicating alarm 130 .

[0072] The lower part of the oil-gas separation chamber 104 is a tar storage area, the bottom of the tube bundle 20 extends to the tar storage area, and the outlet of the gas outlet pipe 40 is located above the tar storage area. The oil-gas separation chamber 104 is also provided with a liquid level meter 90, which is used to measure the liquid level of the oil-gas separation chamber 104 and transmit the liquid level signal to the liquid level indication control alarm 110 to control the liquid level to be higher than the bottom of the tube bundle 20.

[0073] The tar outlet pipe 50 is also provided with a flow meter 120 and a flow indicating alarm 130 .

[0074] The air outlet pipe 40 is also provided with a thermometer 140 and a temperature indicating alarm 150 .

[0075] (2) Tar condensation system

[0076] like Figure 2 The tar condensation system shown in the figure comprises the three tar condensers mentioned above arranged in series, which are respectively denoted as tar condenser I 160, tar condenser II 170 and tar condenser III 180 (the control systems of tar condenser I, tar condenser II and tar condenser III are not marked, and the control system is shown in FIG. Figure 1 ); the air outlet pipe of the tar condenser I is connected to the air inlet pipe of the tar condenser II, and the air outlet pipe of the tar condenser II is connected to the air inlet pipe of the tar condenser III.

[0077] (3) Tar condensation method

[0078] A tar condensation method using the above-mentioned tar condensation system, wherein the oil-containing pyrolysis gas flowing out from a circulating fluidized bed is fed into the air inlet pipe of the tar condenser I and flows out from the air outlet pipe of the tar condenser III; wherein the temperature of the gas in the air outlet pipe of the tar condenser I is controlled to be 450°C, the temperature of the gas in the air outlet pipe of the tar condenser II is controlled to be 250°C, and the temperature of the gas in the air outlet pipe of the tar condenser III is controlled to be 150°C.

[0079] The coal quality data used for the oil-containing pyrolysis gas from a circulating fluidized bed are shown in Table 1. The pyrolysis temperature is 600°C, the coal processing capacity is 2000t / day, and the pyrolysis gas output is 23000Nm 3 / h, the temperature of boiler water added to the system is 104℃.

[0080] Technical effect: The tar condenser, tar condensation system and tar condensation method in Example 1 did not become blocked during operation, and the tar condensation system and tar condensation method in Example 1 separated high-range, medium-range and low-range tars, and simultaneously obtained high-pressure, medium-pressure and low-pressure superheated steam as by-products.

[0081] Performance data:

[0082]

[0083] Example 2

[0084] (1) Tar condenser

[0085] like Figure 1 In the tar condenser shown, the distance between the top of the tube bundle 20 and the bottom of the pretreatment chamber 101 is 50d, and the pressure difference controller 70 acts on the flow actuator 80 arranged on the water inlet pipe to adjust the flow of boiler water entering the evaporation chamber 103 and maintain the pressure difference at 1.2p. The rest is the same as the tar condenser of Example 1.

[0086] (2) Tar condensation system

[0087] like Figure 2 The tar condensation system shown in the figure comprises the three tar condensers mentioned above arranged in series, and the rest is the same as the tar condensation system of Example 1.

[0088] (3) Tar condensation method

[0089] A tar condensation method using the above tar condensation system, which is otherwise the same as the tar condensation method of Example 1.

[0090] Technical effect: The tar condenser, tar condensation system and tar condensation method in Example 2 did not get blocked during operation, and the tar condensation system and tar condensation method in Example 2 separated high-range, medium-range and low-range tars, and simultaneously obtained high-pressure, medium-pressure and low-pressure superheated steam as by-products.

[0091] Performance data:

[0092]

[0093]

[0094] Example 3

[0095] (1) Tar condenser

[0096] like Figure 1 In the tar condenser shown, the distance between the top of the tube bundle 20 and the bottom of the pretreatment chamber 101 is 100d, and the pressure difference controller 70 acts on the flow actuator 80 arranged on the water inlet pipe to adjust the flow of boiler water entering the evaporation chamber 103 and maintain the pressure difference at 1.5p. The rest is the same as the tar condenser of Example 1.

[0097] (2) Tar condensation system

[0098] like Figure 2 The tar condensation system shown in the figure comprises three of the above-mentioned tar condensers arranged in series, and the rest is the same as the tar condensation system of Example 1.

[0099] (3) Tar condensation method

[0100] A tar condensation method using the above tar condensation system, which is otherwise the same as the tar condensation method of Example 1.

[0101] Technical effect: The tar condenser, tar condensation system and tar condensation method in Example 3 did not get blocked during operation, and the tar condensation system and tar condensation method in Example 3 separated high-range, medium-range and low-range tars, and obtained high-pressure, medium-pressure and low-pressure superheated steam as by-products.

[0102] Performance data:

[0103]

[0104]

[0105] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A tar condenser, characterized in that: The tar condenser comprises a shell and a tube bundle; the interior of the shell is divided into a pretreatment chamber, a steam superheating chamber, an evaporation chamber and an oil-gas separation chamber from top to bottom; the tube bundle is located inside the shell, and the tube bundle passes through the pretreatment chamber, the steam superheating chamber, the evaporation chamber and the oil-gas separation chamber in sequence, the top of the tube bundle is spaced from the top inner wall of the pretreatment chamber, and the distance between the top of the tube bundle and the bottom surface of the pretreatment chamber is 50d-100d, wherein d is the nominal diameter of each tube of the tube bundle; the pretreatment chamber is provided with an air inlet pipe for inputting oil-containing pyrolysis gas; the steam superheating chamber is provided with a saturated steam inlet and a superheated steam outlet, the saturated steam inlet is provided on the bottom side wall of the steam superheating chamber, and the superheated steam outlet is provided on the top side wall of the steam superheating chamber; the evaporation chamber is provided with a A water inlet pipe and a saturated steam outlet for inputting boiler water, the water inlet of the water inlet pipe is arranged on the bottom side wall of the evaporation chamber, and the saturated steam outlet is arranged on the top side wall of the evaporation chamber; the saturated steam outlet is communicated with the saturated steam inlet; the oil-gas separation chamber is provided with an outlet pipe for outputting purified gas and a tar outlet pipe for outputting tar; the tar condenser is also provided with a differential pressure transmitter, the differential pressure transmitter is used to measure the pressure difference between the oil-containing pyrolysis gas before entering the tube bundle and after exiting the tube bundle, and transmit the pressure difference signal to the differential pressure controller; the differential pressure controller acts on the flow actuator arranged on the water inlet pipe to adjust the flow of boiler water entering the evaporation chamber and maintain the pressure difference at 1p-1.5p, wherein p is the pressure difference between the oil-containing pyrolysis gas before entering the tube bundle and after exiting the tube bundle measured by the differential pressure transmitter during normal operation.

2. The tar condenser according to claim 1, characterized in that: The distance between the top of the tube bundle and the bottom of the pretreatment chamber is 50d-75d; And / or, the tar condenser is provided with a sewage discharge pipe, and the sewage discharge pipe is arranged on the bottom side wall of the pretreatment chamber.

3. The tar condenser according to claim 1 or 2, characterized in that: The pressure difference controller acts on the flow actuator provided on the water inlet pipe to adjust the flow of boiler water entering the evaporation chamber and maintain the pressure difference at 1p-1.2p; And / or, the pressure difference controller also has display and alarm functions; And / or, the evaporation chamber is further provided with a liquid level meter, which is used to measure the liquid level of the evaporation chamber and transmit the liquid level signal to the liquid level indication alarm; And / or, the water inlet pipe is also provided with a flow meter and a flow indicating alarm.

4. The tar condenser according to claim 1, characterized in that: The lower part of the oil-gas separation chamber is a tar storage area, the bottom of the tube bundle extends to the tar storage area, and the outlet of the outlet pipe is located above the tar storage area.

5. The tar condenser according to claim 4, characterized in that: The oil-gas separation chamber is also provided with a liquid level meter, which is used to measure the liquid level of the oil-gas separation chamber and transmit the liquid level signal to the liquid level indication control alarm to control the liquid level to be higher than the bottom of the tube bundle.

6. The tar condenser according to claim 1, characterized in that: The tar outlet pipe is also provided with a flow meter and a flow indicator alarm; And / or, the air outlet pipe is also provided with a thermometer and a temperature indicating alarm.

7. A tar condensation system, characterized in that: The tar condensation system comprises a plurality of tar condensers as described in any one of claims 1 to 6 arranged in series.

8. The tar condensation system according to claim 7, characterized in that: The number of the tar condensers is 2-4.

9. The tar condensation system according to claim 8, characterized in that: The number of the tar condensers is 3.

10. A tar condensation system, characterized in that: The tar condensation system includes a tar condenser I, a tar condenser II and a tar condenser III which are arranged in series; wherein the tar condenser I is the tar condenser as described in any one of claims 1 to 6, and the tar condenser II is not provided with the steam superheating chamber on the basis of the tar condenser I; and the tar condenser III is not provided with the steam superheating chamber and the evaporation chamber on the basis of the tar condenser I.

11. A tar condensation method, characterized in that: The tar condensation method adopts the tar condensation system as described in any one of claims 7 to 10, and the oil-containing pyrolysis gas is fed into the inlet pipe of the first-stage tar condenser, and the oil-containing pyrolysis gas flows out from the outlet pipe of the last-stage tar condenser.

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