High-efficiency energy-saving double-effect concentration device capable of preventing material coking

Abstract

According to the high-efficiency energy-saving double-effect concentration device capable of preventing the material coking, provided by the utility model, the second circulating pipe and the fourth circulating pipe are arranged, so that after the materials in the first-effect evaporation chamber and the second-effect evaporation chamber are evaporated, the materials with lower concentration at the upper parts can respectively enter the first-effect heater and the second-effect heater to be heated and concentrated; therefore, the concentration of the concentrated material is ensured, and the problem that the concentration of the material at the lower part is relatively high and the material is easily coked in the heating process due to different concentrations of the upper part and the lower part in the concentration process of the material can be avoided. By arranging the cyclone type gas-liquid separator, steam generated in the first-effect evaporation chamber can be subjected to gas-liquid separation, the steam in the first-effect evaporation chamber can be separated from leaked materials and high-temperature gas in the first-effect evaporation chamber, and the leaked materials can be recycled to the first-effect evaporation chamber through the backflow pipeline; and the high-temperature gas can be used for heating materials in the double-effect heater, so that effective utilization of energy is realized, and the purpose of saving energy is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of anti-coking concentration devices, specifically relating to a high-efficiency and energy-saving dual-effect concentration device for preventing material coking. Background Technology

[0002] In the concentration process of materials, heating is required, which can easily lead to charring. To prevent charring, existing methods involve manually or mechanically stirring the heated materials. Stirring helps prevent charring due to prolonged localized heating. While these methods can prevent charring to some extent, the temperature and concentration of the material differ between the upper and lower parts during stirring. The lower part is more prone to charring due to slower stirring speed. Therefore, this invention provides a highly efficient and energy-saving dual-effect concentration device to prevent material charring, thus solving the aforementioned problems associated with existing manual or mechanical stirring methods. Summary of the Invention

[0003] This utility model provides a high-efficiency and energy-saving dual-effect concentration device to prevent material coking, thereby solving the above-mentioned technical problems. The specific solution is as follows:

[0004] A high-efficiency, energy-saving dual-effect concentration device for preventing material coking includes:

[0005] The first gas-liquid separation evaporation section includes a first buffer tank, a second buffer tank, a first-effect heater, a first-effect evaporation chamber, and a first-effect cyclone gas-liquid separator. The first buffer tank, the second buffer tank, the first-effect heater, the first-effect evaporation chamber, and the first-effect cyclone gas-liquid separator are connected by a pipeline. The lower part of the first-effect evaporation chamber is connected to a first high-concentration material collector, and the first high-concentration material collector is connected to the first-effect heater by a pipeline.

[0006] The second gas-liquid separation evaporation section includes a double-effect heater, a double-effect evaporation chamber, a double-effect cyclone gas-liquid separator, a third buffer tank, and a condenser. The double-effect heater, double-effect evaporation chamber, double-effect cyclone gas-liquid separator, third buffer tank, and condenser are connected by pipelines. A second high-concentration material collector is connected to the lower part of the double-effect evaporation chamber, and the second high-concentration material collector is connected to the double-effect heater by pipelines. A water collection tank is connected to the lower part of the condenser.

[0007] The first-effect cyclone gas-liquid separator and the second-effect heater are connected by a first-effect vacuum tube.

[0008] Furthermore, a first shut-off valve and a first flow meter are installed on the pipe connecting the first buffer tank and the second buffer tank in the first gas-liquid separation evaporation section. The first buffer tank is also connected to a first-effect vacuum tube via a condensate recovery pipe. One end of the condensate recovery pipe connected to the first-effect vacuum tube extends into the second-effect heater. A second flow meter and a control valve are installed on the condensate recovery pipe. The second buffer tank is connected to the first-effect heater via a pipe. A discharge pipe connects the bottoms of the first-effect heater and the second-effect heater. A manual valve for material discharge is installed on the discharge pipe. The first-effect heater is also connected to a first-effect cyclone circulating spray. The pipe is connected to the middle of the first-effect evaporation chamber. A first circulation pipe is connected between the lower part of the first-effect heater and the bottom of the first high-concentration material collector. The first circulation pipe is connected to the lower part of the first-effect evaporation chamber through a second circulation pipe. A second shut-off valve is provided on the first circulation pipe, and a third shut-off valve is provided on the second circulation pipe. The upper part of the first-effect evaporation chamber is connected to the first-effect cyclone gas-liquid separator through a pipe. The first-effect cyclone gas-liquid separator is connected to the second-effect heater through the first-effect vacuum pipe. The first buffer tank is also provided with an air vent valve through a pipe, and this pipe is connected to the condensate recovery pipe through another pipe with a switching valve.

[0009] Furthermore, in the second gas-liquid separation evaporation section, the upper part of the double-effect heater is connected to the double-effect evaporation chamber via a double-effect cyclone circulating nozzle, and the lower part is connected to the second high-concentration material collector and the third buffer tank via a third circulating pipe and a double-effect condensate drain vacuum pipe, respectively. A fourth shut-off valve is provided on the third circulating pipe, and the third circulating pipe is connected to the lower part of the double-effect evaporation chamber via a fourth circulating pipe. A fifth shut-off valve is provided on the fourth circulating pipe. The upper part of the double-effect evaporation chamber is connected to the double-effect cyclone gas-liquid separator via a pipe, and the condenser is connected to the double-effect cyclone gas-liquid separator via a steam inlet pipe, with one end of the steam inlet pipe connected to the condenser being funnel-shaped. The steam inlet pipe is connected to the third buffer tank via a double-effect vacuum balance pipe, and the lower part of the third buffer tank is also connected to the condenser and the water collection tank via pipes, respectively, with manual valves provided on the connected pipes.

[0010] Furthermore, an atomizing nozzle is provided at one end of the condensate recovery pipe that extends into the double-effect heater.

[0011] Furthermore, the single-effect cyclone gas-liquid separator and the double-effect cyclone gas-liquid separator are the same cyclone gas-liquid separator, including a steam inlet, a cyclone separation chamber, a separation chamber, a separated steam outlet, a cleaning port, and a separated liquid outlet. The steam inlet is connected to the upper part of the single-effect evaporation chamber or the double-effect evaporation chamber. The separated steam outlet is connected to the single-effect vacuum tube or the steam inlet pipe. The separated liquid outlet is connected to the single-effect evaporation chamber or the double-effect evaporation chamber through a pipe, and each connected pipe is equipped with a hand valve.

[0012] Furthermore, the first-effect cyclone circulating nozzle and the second-effect cyclone circulating nozzle are the same cyclone circulating nozzle, including a material circulation inlet, a cyclone spray chamber and an injection port. The material circulation inlet is connected to the first-effect heater or the second-effect heater, and the injection port is connected to the first-effect evaporation chamber or the second-effect evaporation chamber.

[0013] The beneficial effects of this utility model are:

[0014] 1. By setting up a second circulation pipe and a fourth circulation pipe, the material with a lower concentration at the top of the first-effect evaporation chamber and the second-effect evaporation chamber after evaporation can enter the first-effect heater and the second-effect heater respectively for heating and concentration. This ensures the concentration of the material after concentration and avoids the problem of the lower material having a higher concentration and being prone to coking during heating due to the difference in concentration between the upper and lower parts of the material.

[0015] 2. By setting up a cyclone gas-liquid separator, the steam generated in the first-effect evaporator can be separated into gas and liquid. The steam in the first-effect evaporator can be separated from the material runoff and high-temperature gas. The runoff material can be recovered back to the first-effect evaporator through the return pipe, and the high-temperature gas can be used to heat the material in the second-effect heater. This achieves efficient use of energy and saves energy. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a high-efficiency and energy-saving dual-effect concentration device for preventing material coking;

[0017] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0018] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle;

[0019] Figure 4 for Figure 2 A magnified view of a portion of point C in the middle;

[0020] Figure 5This is a schematic diagram of a single-effect cyclone gas-liquid separator.

[0021] Figure 6 This is a schematic diagram of a single-effect cyclone circulating nozzle.

[0022] In the diagram: 1. First buffer tank; 2. Switching valve; 3. First shut-off valve; 4. Second buffer tank; 5. First-effect heater; 6. Second shut-off valve; 7. First circulation pipe; 8. Second circulation pipe; 9. Third shut-off valve; 10. First high-concentration material collector; 11. Second flow meter; 12. Control valve; 13. Atomizing nozzle; 14. First-effect evaporation chamber; 15. First-effect cyclone gas-liquid separator; 151. Steam inlet; 152. Cyclone separation chamber; 153. Separation chamber; 154. Separated steam outlet; 155. Cleaning port; 156. Separated liquid outlet; 16. First-effect vacuum tube; 17. Second-effect heater; 18. Third circulation pipe; 19. Fourth shut-off valve; 20. Fifth shut-off valve; 21. Fourth circulation pipe; 22. Second high-concentration material collector; 23. Second-effect condensate drain vacuum pipe; 24. Third buffer tank; 25. Second-effect evaporation chamber; 26. Second-effect cyclone gas-liquid separator; 27. Steam inlet pipe; 28. Second-effect vacuum balance pipe; 29. ​​Condenser; 30. Water collection tank; 31. First-effect cyclone circulation nozzle; 311. Material circulation inlet; 312. Cyclone spray chamber; 313. Injection port; 32. Second-effect cyclone circulation nozzle; 33. Discharge pipe; 34. Condensate recovery pipe; 35. Drain valve; 36. First flow meter; 37. Material inlet. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] like Figure 1 , Figure 2 , Figure 3As shown, this utility model provides a high-efficiency and energy-saving dual-effect concentration device for preventing material coking, comprising: a first gas-liquid separation evaporation section, which includes a first buffer tank 1, a second buffer tank 4, a first-effect heater 5, a first-effect evaporation chamber 14, and a first-effect cyclone gas-liquid separator 15. The first buffer tank 1, the second buffer tank 4, the first-effect heater 5, the first-effect evaporation chamber 14, and the first-effect cyclone gas-liquid separator 15 are connected by pipes. A first high-concentration material collector 10 is connected to the lower part of the first-effect evaporation chamber 14, and the first high-concentration material collector 10 is connected to the first-effect heater 5 by pipes; and a second gas-liquid separation evaporation section. The second gas-liquid separation evaporation section includes a double-effect heater 17, a double-effect evaporation chamber 25, a double-effect cyclone gas-liquid separator 26, a third buffer tank 24, and a condenser 29. The double-effect heater 17, the double-effect evaporation chamber 25, the double-effect cyclone gas-liquid separator 26, the third buffer tank 24, and the condenser 29 are connected by pipes. The lower part of the double-effect evaporation chamber 25 is connected to a second high-concentration material collector 22, which is connected to the double-effect heater 17 by a pipe. The lower part of the condenser 29 is connected to a water collection tank 30. The first-effect cyclone gas-liquid separator 15 is connected to the double-effect heater 17 by a first-effect vacuum tube 16.

[0025] like Figure 1 , Figure 2 , Figure 4 As shown in the above embodiment, a first shut-off valve 3 and a first flow meter 36 are installed on the pipe connecting the first buffer tank 1 and the second buffer tank 4 in the first gas-liquid separation evaporation section. The first buffer tank 1 is also connected to the first-effect vacuum tube 16 through a condensate recovery pipe 34. One end of the condensate recovery pipe 34 connected to the first-effect vacuum tube 16 extends into the second-effect heater 17. A second flow meter 11 and a control valve 12 are installed on the condensate recovery pipe 34. The second buffer tank 4 is connected to the first-effect heater 5 through a pipe. A discharge pipe 33 is connected between the bottom of the first-effect heater 5 and the second-effect heater 17. A manual valve for material discharge is installed on the discharge pipe 33. The first-effect heater 5 is also connected to the first-effect cyclone type The circulating nozzle 31 is connected to the middle of the first-effect evaporation chamber 14. The lower part of the first-effect heater 5 is connected to the bottom of the first high-concentration material collector 10 by a first circulating pipe 7. The first circulating pipe 7 is connected to the lower part of the first-effect evaporation chamber 14 through a second circulating pipe 8. A second shut-off valve 6 is installed on the first circulating pipe 7, and a third shut-off valve 9 is installed on the second circulating pipe 8. The upper part of the first-effect evaporation chamber 14 is connected to the first-effect cyclone gas-liquid separator 15 through a pipe. The first-effect cyclone gas-liquid separator 15 is connected to the second-effect heater 17 through a first-effect vacuum pipe 16. The first buffer tank 1 is also equipped with an air vent valve 35 through a pipe, and this pipe is connected to the condensate recovery pipe 34 through another pipe by a switching valve 2.

[0026] like Figure 1 , Figure 3As shown, in the second gas-liquid separation evaporation section, the upper part of the double-effect heater 17 is connected to the double-effect evaporation chamber 25 through the double-effect cyclone circulating nozzle 32, and the lower part is connected to the second high-concentration material collector 22 and the third buffer tank 24 through the third circulation pipe 18 and the double-effect condensate drain vacuum pipe 23, respectively. A fourth shut-off valve 19 is installed on the third circulation pipe 18, and the third circulation pipe 18 is connected to the lower part of the double-effect evaporation chamber 25 through the fourth circulation pipe 21. A fifth shut-off valve 20 is installed on the fourth circulation pipe 21. The upper part of the double-effect evaporation chamber 25 is connected to the double-effect cyclone gas-liquid separator 26 through a pipe. The condenser 29 is connected to the double-effect cyclone gas-liquid separator 26 through the steam inlet pipe 27, and the end of the steam inlet pipe 27 connected to the condenser 29 is funnel-shaped. The steam inlet pipe 27 is connected to the third buffer tank 24 through the double-effect vacuum balance pipe 28. The lower part of the third buffer tank 24 is also connected to the condenser 29 and the water collection tank 30 through pipes, respectively, and a hand valve is installed on the connected pipes.

[0027] In the above, the condensate recovery pipe 34 extends into the double-effect heater 17 and is equipped with an atomizing nozzle 13 at one end.

[0028] like Figure 1 , Figure 5 As shown above, the single-effect cyclone gas-liquid separator 15 and the double-effect cyclone gas-liquid separator 26 are the same cyclone gas-liquid separator, including a steam inlet 151, a cyclone separation chamber 152, a separation chamber 153, a separated steam outlet 154, a cleaning port 155, and a separated liquid outlet 156. The steam inlet 151 is connected to the upper part of the single-effect evaporation chamber 14 or the double-effect evaporation chamber 25. The separated steam outlet 154 is connected to the single-effect vacuum tube 16 or the steam inlet pipe 27. The separated liquid outlet 156 is connected to the single-effect evaporation chamber 14 or the double-effect evaporation chamber 25 through a pipe, and each connected pipe is equipped with a hand valve.

[0029] like Figure 1 , Figure 6 As shown, the first-effect cyclone circulating nozzle 31 and the second-effect cyclone circulating nozzle 32 are the same cyclone circulating nozzle, including a material circulation inlet 311, a cyclone spray chamber 312 and a spray nozzle 313. The material circulation inlet 311 is connected to the first-effect heater 5 or the second-effect heater 17, and the spray nozzle 313 is connected to the first-effect evaporation chamber 14 or the second-effect evaporation chamber 25.

[0030] The working principle of this utility model is as follows:

[0031] Before starting, open the second shut-off valve 6 and close the third shut-off valve 9 to connect the first-effect heater 5, the first circulation pipe 7, and the first-effect cyclone circulation nozzle 31. Then, turn on the first-effect heater 5 and add material into it through the material inlet 37. The heated material enters the first-effect evaporation chamber 14 through the first-effect cyclone circulation nozzle 31. The material in the first-effect evaporation chamber 14 then enters the first-effect heater 5 through the first circulation pipe 7, and then enters the first-effect evaporation chamber 14 through the first-effect cyclone circulation nozzle 31 again. This cycle continues until the first-effect evaporation... When the specific gravity of the material in chamber 14 is concentrated to about 1:1, the second shut-off valve 6 is closed and the third shut-off valve 9 is opened. Under vacuum, the low-concentration material enters the first-effect heater 5 from the second circulation pipe 8. The heated material is sprayed out from the first-effect cyclone circulation nozzle 31. In this process, the material enters from the material circulation inlet 311, passes through the cyclone spray chamber 312, and is sprayed out from the nozzle. The high-concentration material is collected in the first high-concentration material collector 10, thus solving the problem of coking caused by the difference in concentration between the upper and lower parts of the material due to stirring during the concentration process. During the material concentration process, the generated steam is separated by the first-effect cyclone gas-liquid separator 15. The steam enters the cyclone separation chamber 151 through the steam inlet. After passing through the separation chamber 153, the high-temperature gas separated is discharged from the separated steam outlet. The water containing the material remains in the first-effect cyclone gas-liquid separator 15. Since the water may contain material that has escaped from the first-effect evaporation chamber 14, it can be returned to the first-effect evaporation chamber 14 through the return pipe. The high-temperature gas enters the second-effect heater 17 through the first-effect vacuum pipe 16. When control valve 12 is opened, the material is sprayed from the first buffer pipe 1 through the condensate recovery pipe 34 and from the atomizing nozzle 13 into the second-effect heater 17 for heating, repeating the heating process of the first-effect heater 5. High-concentration material is collected in the second high-concentration material collector 22. The generated steam is separated by the second-effect cyclone gas-liquid separator 26, and the generated gas enters the condenser 29 through the steam inlet pipe 27. The condensed water enters the water collection tank 30, and the high-temperature gas enters the second-effect heater 17 through the first-effect vacuum pipe 16 to heat the material, thus achieving the reuse of high-temperature gas and saving energy. Excess material in the first-effect heater 5 and the second-effect heater 17 can enter the second buffer tank 4 and the third buffer tank 24 respectively, thus serving as a material collection function. By opening the first shut-off valve 3, the material in the second buffer tank 4 can be transferred into the first buffer tank 1.

[0032] In the above-mentioned configuration, by setting up the second circulation pipe 8 and the fourth circulation pipe 21, the material with a lower concentration at the top of the first-effect evaporation chamber 14 and the second-effect evaporation chamber 25 after evaporation can enter the first-effect heater 5 and the second-effect heater 17 respectively for heating and concentration. This ensures the concentration of the concentrated material and avoids the problem of coking during heating due to the difference in concentration between the upper and lower parts of the material. By setting up a cyclone gas-liquid separator, the steam generated in the first-effect evaporation chamber 14 can be separated into gas and liquid components. The steam in the first-effect evaporation chamber 14 can be separated to remove the material runoff and high-temperature gas. The runoff material can be recovered back to the first-effect evaporation chamber 14 through the return pipe, and the high-temperature gas can be used to heat the material in the second-effect heater 17. This achieves efficient energy utilization and energy conservation.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency, energy-saving, dual-effect concentration device for preventing material coking, characterized in that, include: The first gas-liquid separation evaporation section includes a first buffer tank (1), a second buffer tank (4), a first-effect heater (5), a first-effect evaporation chamber (14), and a first-effect cyclone gas-liquid separator (15). The first buffer tank (1), the second buffer tank (4), the first-effect heater (5), the first-effect evaporation chamber (14), and the first-effect cyclone gas-liquid separator (15) are connected by pipes. The lower part of the first-effect evaporation chamber (14) is connected to a first high-concentration material collector (10). The first high-concentration material collector (10) is connected to the first-effect heater (5) by pipes. The second gas-liquid separation evaporation section includes a double-effect heater (17), a double-effect evaporation chamber (25), a double-effect cyclone gas-liquid separator (26), a third buffer tank (24), and a condenser (29). The double-effect heater (17), the double-effect evaporation chamber (25), the double-effect cyclone gas-liquid separator (26), the third buffer tank (24), and the condenser (29) are connected by pipes. The lower part of the double-effect evaporation chamber (25) is connected to a second high-concentration material collector (22). The second high-concentration material collector (22) is connected to the double-effect heater (17) by pipes. The lower part of the condenser (29) is connected to a water collection tank (30). The single-effect cyclone gas-liquid separator (15) and the double-effect heater (17) are connected by a single-effect vacuum tube (16).

2. The high-efficiency and energy-saving dual-effect concentration device for preventing material coking according to claim 1, characterized in that: A first shut-off valve (3) and a first flow meter (36) are installed on the pipe connecting the first buffer tank (1) and the second buffer tank (4) in the first gas-liquid separation evaporation section. The first buffer tank (1) is also connected to a first-effect vacuum tube (16) through a condensate recovery pipe (34). One end of the condensate recovery pipe (34) connected to the first-effect vacuum tube (16) extends into the second-effect heater (17). A second flow meter (11) and a control valve (12) are installed on the condensate recovery pipe (34). The second buffer tank (4) is connected to the first-effect heater (5) through a pipe. A discharge pipe (33) is connected between the bottom of the first-effect heater (5) and the second-effect heater (17). A hand valve for material discharge is installed on the discharge pipe (33). The first-effect heater (5) is also connected to a first-effect cyclone circulating nozzle (36). 1) The first effect evaporation chamber (14) is connected to the middle part of the first effect heater (5) and the bottom of the first high concentration material collector (10) are connected by a first circulation pipe (7). The first circulation pipe (7) is connected to the lower part of the first effect evaporation chamber (14) through a second circulation pipe (8). A second shut-off valve (6) is provided on the first circulation pipe (7) and a third shut-off valve (9) is provided on the second circulation pipe (8). The upper part of the first effect evaporation chamber (14) is connected to the first effect cyclone gas-liquid separator (15) through a pipe. The first effect cyclone gas-liquid separator (15) is connected to the second effect heater (17) through the first effect vacuum pipe (16). The first buffer tank (1) is also provided with an air vent valve (35) through a pipe. The pipe is connected to the condensate recovery pipe (34) through another pipe and a switching valve (2).

3. The high-efficiency and energy-saving dual-effect concentration device for preventing material coking according to claim 2, characterized in that: In the second gas-liquid separation evaporation section, the upper part of the double-effect heater (17) is connected to the double-effect evaporation chamber (25) through a double-effect cyclone circulating nozzle (32), and the lower part is connected to the second high-concentration material collector (22) and the third buffer tank (24) through a third circulation pipe (18) and a double-effect condensate drain vacuum pipe (23), respectively. A fourth shut-off valve (19) is provided on the third circulation pipe (18), and the third circulation pipe (18) is connected to the lower part of the double-effect evaporation chamber (25) through a fourth circulation pipe (21). A fifth shut-off valve (20) is provided on the fourth circulation pipe (21). The upper part of the double-effect evaporation chamber (25) is connected to the double-effect cyclone gas-liquid separator (26) through a pipe. The condenser (29) is connected to the double-effect cyclone gas-liquid separator (26) through a steam inlet pipe (27). The end of the steam inlet pipe (27) connected to the condenser (29) is flared. The steam inlet pipe (27) is connected to the third buffer tank (24) through a double-effect vacuum balance pipe (28). The lower part of the third buffer tank (24) is also connected to the condenser (29) and the water collection tank (30) through pipes. A hand valve is installed on the connected pipes.

4. The high-efficiency and energy-saving dual-effect concentration device for preventing material coking according to claim 3, characterized in that: The condensate recovery pipe (34) extends into the double-effect heater (17) and is equipped with an atomizing nozzle (13) at one end.

5. The high-efficiency and energy-saving dual-effect concentration device for preventing material coking according to claim 3 or 4, characterized in that: The single-effect cyclone gas-liquid separator (15) and the double-effect cyclone gas-liquid separator (26) are the same cyclone gas-liquid separator, including a steam inlet (151), a cyclone separation chamber (152), a separation chamber (153), a separated steam outlet (154), a cleaning port (155), and a separated liquid outlet (156). The steam inlet (151) is connected to the upper part of the single-effect evaporation chamber (14) or the double-effect evaporation chamber (25). The separated steam outlet (154) is connected to the single-effect vacuum tube (16) or the steam inlet pipe (27). The separated liquid outlet (156) is connected to the single-effect evaporation chamber (14) or the double-effect evaporation chamber (25) through a pipe, and each connected pipe is equipped with a hand valve.

6. The high-efficiency and energy-saving dual-effect concentration device for preventing material coking according to claim 5, characterized in that: The first-effect cyclone circulating nozzle (31) and the second-effect cyclone circulating nozzle (32) are the same cyclone circulating nozzle, including a material circulation inlet (311), a cyclone spray chamber (312) and a spray port (313). The material circulation inlet (311) is connected to the first-effect heater (5) or the second-effect heater (17), and the spray port (313) is connected to the first-effect evaporation chamber (14) or the second-effect evaporation chamber (25).

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