A phenol sodium salt decomposition and crude phenol refining system

Abstract

The application discloses a phenol sodium salt decomposition and crude phenol refining system and belongs to the technical field of waste gas treatment devices. The system comprises a washing tower and a filler layer arranged in the washing tower, a spray head is arranged above the filler layer, and the system further comprises a water storage box arranged below the filler layer and provided with multiple groups, the projections of the multiple groups of water storage boxes along the axis direction of the washing tower cover the filler layer, and the cleaning liquid falling through the filler layer can pass through the water storage box; a flow guide plate is arranged at the bottom of the water storage box and is in sliding cooperation with the water storage box along the axis direction of the washing tower; and a rotating shaft passes through the center of the enclosed area of the multiple groups of water storage boxes. The blocking state of each area of the filler layer can be automatically identified by sequentially blocking and detecting each flow guide plate through the baffle. When blocking occurs in a certain area, the baffle and the flow guide plate corresponding to the area are circumferentially locked, the rotating shaft drives the baffle and the flow guide plate to reciprocate along the axis direction, and the blocked area is subjected to fixed-point flushing.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment equipment technology, and in particular to a sodium phenolate decomposition and crude phenol refining system. Background Technology

[0002] Crude phenol, an important chemical intermediate, is mainly produced through the acidification and decomposition process of sodium phenolate. This process typically uses an aqueous solution of sodium phenolate as raw material, introducing carbon dioxide or sulfur dioxide to carry out an acidification reaction, causing the sodium phenolate to displace and decompose into crude phenol product. Simultaneously, it releases process waste gas containing unreacted acidic gases, volatile phenolic vapors, water vapor, and tar droplets. This waste gas is toxic, corrosive, and irritating, and cannot be directly emitted. Industrially, packed scrubbing towers are commonly used for purification. Alkaline scrubbing liquid comes into countercurrent contact with the waste gas on the surface of the packing material, achieving neutralization of acidic gases, absorption of phenolic substances, and removal of tar impurities.

[0003] In existing technologies, packed scrubbing towers mostly adopt a structure of fixed spray combined with bulk packing. Waste gas passes through the packing layer from bottom to top, while the scrubbing liquid is sprayed from top to bottom by nozzles at the top of the tower. The packing increases the gas-liquid contact area, improving the purification effect. However, in the actual operation of sodium phenolate decomposition and crude phenol refining systems, tar, phenolic crystals, and dust impurities entrained in the waste gas easily deposit and adhere at the bottom of the packing layer, causing localized blockage. After blockage, the effective ventilation cross-sectional area decreases, airflow distribution becomes uneven, and the gas velocity in unblocked areas increases, leading to a shortened gas-liquid contact time and a decrease in scrubbing efficiency.

[0004] Therefore, it is necessary to provide a system for the decomposition of sodium phenolate and the purification of crude phenol to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a system for the decomposition of sodium phenolate and the purification of crude phenol, so as to solve the technical problems mentioned in the background art.

[0006] Based on the above ideas, the present invention provides the following technical solution: a sodium phenolate decomposition and crude phenol refining system, comprising a washing tower and a packing layer disposed within the washing tower, a nozzle disposed above the packing layer, and further comprising: A water storage box is provided below the packing layer and multiple sets are provided. The projection of the multiple sets of water storage boxes along the axis of the washing tower covers the packing layer, and the cleaning liquid falling through the packing layer can pass through the water storage box. A baffle plate is located at the bottom of the water storage box and slides in conjunction with the water storage box along the axis of the washing tower; The pivot point passes through the center of the area enclosed by multiple water storage boxes; A baffle is installed below the water storage box and can block the guide plate at the bottom of the water storage box; The lifting ring is sleeved on the outside of the rotating shaft and fixed relative to the baffle. When the baffle and the guide plate are locked, the lifting ring can drive the baffle and the guide plate to move synchronously along the axis of the rotating shaft during the rotation process, so as to squeeze the cleaning liquid accumulated in the water storage box upward.

[0007] As a further aspect of the present invention: the top plate of the water storage box and the flow guide plate are both provided with flow guide holes, and the baffle is uniformly provided with through holes. When the baffle and the flow guide plate are locked, the through holes are completely offset from the flow guide holes on the flow guide plate.

[0008] As a further aspect of the present invention: a guide groove is provided on the outer circular surface of the rotating shaft. The guide groove is composed of two spiral grooves connected end to end, and the projection of the guide groove along the axis of the rotating shaft is a ring. A protrusion that slides with the guide groove is provided on the inner wall of the lifting ring.

[0009] As a further aspect of the present invention: a locking pin is provided at the guide plate, and the locking pin is elastically engaged with the guide plate along the axis of rotation. The top of the baffle is provided with a pin hole that engages with the locking pin. When the bottom end of the locking pin is inserted into the pin hole, the baffle and the guide plate are locked together.

[0010] As a further aspect of the present invention: the locking pin is connected to a float via a connector. When the through hole is misaligned with the guide hole on the guide plate, the float floats to a designated position and can pull the locking pin to make it misaligned with the pin hole.

[0011] As a further aspect of the present invention: both sides of the top of the baffle are provided with chamfers, and during the rotation of the baffle along the circumferential direction of the rotating shaft, the locking pin at the guide plate can contact the chamfers on the baffle.

[0012] As a further aspect of the present invention: both sides of the bottom of the guide plate are fixed with limiting parts, and the limiting parts are generally set in an L shape, so that a limiting groove for limiting the baffle is formed between the limiting parts and the guide plate.

[0013] As a further embodiment of the present invention: a main pipe is provided outside the washing tower, and a branch pipe is provided in connection with the part of the main pipe extending into the washing tower, and the nozzle is installed on the branch pipe.

[0014] As a further aspect of the present invention: the washing tower is provided with a drive shaft that cooperates with the rotating shaft, and the drive shaft and the rotating shaft are connected by a right-angle commutator.

[0015] As a further aspect of the present invention: a support plate is fixed inside the washing tower, the support plate is a mesh plate structure, and the packing layer rests on the support plate.

[0016] Compared with existing technologies, the advantages of this invention are: by sequentially sealing and detecting each guide plate with baffles, the blockage status of each area of ​​the packing layer can be automatically identified. When a blockage occurs in a certain area, the baffle and the corresponding guide plate form a circumferential lock, and the rotating shaft then drives the baffle and guide plate to reciprocate axially, performing targeted flushing of the blocked area. Compared with traditional high-pressure water jet flushing or tower top spray flushing, this solution can accurately locate and directionally flush, resulting in higher treatment efficiency and better effect, while avoiding excessive scouring of normal areas and effectively protecting the overall performance of the packing layer. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the washing tower of the present invention; Figure 3 This is a schematic diagram showing the positions of the baffle and the guide plate of the present invention; Figure 4 This is a schematic diagram showing the positions of the water storage box, support plate, and filler layer of the present invention. Figure 5 This is a schematic diagram of the internal structure of the water storage box of the present invention; Figure 6 This is a schematic diagram of the guide groove structure of the present invention; Figure 7 This is the present invention. Figure 5 A magnified structural diagram at point A; Figure 8 This is the present invention. Figure 5 A magnified structural diagram at point B; Figure 9 This is the present invention. Figure 5 A magnified structural diagram at point C; Figure 10 This is a schematic diagram of the limiting part structure of the present invention.

[0019] In the diagram: 1. Phenol production unit; 2. Washing tower; 201. Exhaust pipe; 3. Main pipe; 301. Annular part; 4. Rotating shaft; 401. Guide groove; 5. Nozzle; 6. Water storage box; 602. Limiting groove; 7. Packing layer; 8. Right-angle reversing device; 9. Drive shaft; 10. Baffle; 1001. Pin hole; 1002. Chamfer; 11. Lifting ring; 1101. Protrusion; 12. Elastic element; 13. Boss; 14. Support plate; 15. Float; 16. Guide plate; 1601. Limiting block; 1602. Limiting part; 17. Locking pin; 18. Connecting part; 19. Support rod. Detailed Implementation

[0020] like Figures 1-10 As shown, a sodium phenolate decomposition and crude phenol refining system includes a phenol-producing unit 1 and a scrubbing tower 2 connected to the phenol-producing unit 1 for cleaning the waste gas generated during the reaction. The phenol-producing unit 1 uses an aqueous solution of sodium phenolate as raw material and employs an acidification decomposition process to obtain crude phenol. During the decomposition process, unreacted CO2 or SO2 acidic gases are released, carrying volatile phenols, water vapor, and trace amounts of tar droplets, forming phenol-containing acidic waste gas. This waste gas is introduced into the scrubbing tower 2 through a pipeline, where it comes into countercurrent contact with an alkaline scrubbing liquid through the packing material inside the tower, achieving neutralization of the acidic gas, capture of phenolic droplets, and removal of tar impurities. The purified gas can be discharged through an exhaust pipe 201 connected to the top of the scrubbing tower 2.

[0021] The washing tower 2 has multiple sets of support plates 14 fixedly installed inside. The support plates 14 adopt a mesh structure. A packing layer 7 is laid on top of the support plates 14, and nozzles 5 are arranged above the packing layer 7. During operation, the washing liquid sprayed from the nozzles 5 flows from top to bottom along the packing layer 7, making full contact with the process airflow rising from bottom to top. The packing layer 7 increases the gas-liquid contact area and reduces the rising velocity of the airflow, prolonging the gas-liquid two-phase contact time, thereby improving the washing and purification effect.

[0022] In actual use, tar or impurities carried in the gas can clog the bottom of the packing layer 7, reducing the permeability of local areas of the packing layer 7. As a result, the gas will pass through other areas of the packing layer 7, increasing the overall velocity of the gas through the packing layer 7, which is not conducive to sufficient contact between the gas and the liquid medicine. Based on this, this solution provides multiple sets of water storage boxes 6 at the bottom of the support plate 14, and the water storage boxes 6 are fixed to the inner wall of the washing tower 2. The projection of the water storage boxes 6 along the axis of the washing tower 2 is a fan-shaped structure, and multiple sets of water storage boxes 6 can form a ring structure along the circumference of the washing tower 2.

[0023] Combination Figures 5-10 As shown, a rotating shaft 4 is coaxially arranged inside the washing tower 2. The rotating shaft 4 passes through the center of the area enclosed by multiple sets of water storage boxes 6, so that each water storage box 6 is in contact with the outer circular surface of the rotating shaft 4. The water storage box 6 is open only at the bottom, and a guide plate 16 is provided at the bottom opening of the water storage box 6. The guide plate 16 can move relative to the water storage box 6 along the axis of the rotating shaft 4. Multiple sets of guide holes are provided on the top plate of the water storage box 6 and the guide plate 16, so that the liquid sprayed from the nozzle 5 can enter the water storage box 6 after passing through the filler layer 7 and can flow downward naturally.

[0024] A baffle 10 is also provided on the outer side of the rotating shaft 4. The top of the baffle 10 is attached to the bottom of the guide plate 16, which can block the guide holes on the guide plate 16. The present invention divides the packing layer 7 into multiple independent areas along the circumference through multiple sets of water storage boxes 6. When a certain area of ​​the packing layer 7 is blocked, the flow rate of the washing liquid flowing through the area and into the corresponding water storage box 6 is significantly reduced. At this time, the baffle 10 is driven to rotate along the rotating shaft 4 to the bottom of the guide plate 16 corresponding to the blocked area and block it. Then, the baffle 10 drives the guide plate 16 to reciprocate along the axis of the rotating shaft 4. The washing liquid accumulated in the water storage box 6 is squeezed upward and sprayed out through the guide holes on the top plate, thereby achieving a bottom-up reverse flushing of the blocked area of ​​the packing layer 7.

[0025] A lifting ring 11 is sleeved on the outer side of the rotating shaft 4, and the lifting ring 11 is fixedly connected to the baffle 10 by an inclined support rod 19. The inclined support rod 19 can transmit circumferential torque and axial force simultaneously, so that the lifting ring 11 can drive the baffle 10 to rotate around the rotating shaft 4, and also drive the baffle 10 to reciprocate along the axis of the rotating shaft 4.

[0026] The outer circular surface of the rotating shaft 4 is provided with a guide groove 401, and the inner wall of the lifting ring 11 is provided with a protrusion 1101 that slides with the guide groove 401. The guide groove 401 is composed of two spiral grooves connected end to end, and the projection of the guide groove 401 along the axis of the rotating shaft 4 is a closed annulus. When the baffle 10 and any of the guide plates 16 are in the locked state, the rotation of the rotating shaft 4 can drive the baffle 10 to reciprocate along the axis of the rotating shaft 4 through the cooperation of the guide groove 401 and the protrusion 1101, thereby performing targeted flushing on the blocked area of ​​the packing layer 7.

[0027] To achieve a locking fit between the guide plate 16 and the baffle 10, the guide plate 16 is provided with a locking pin 17, which elastically slides with the guide plate 16 along the axis of rotation 4; the top of the baffle 10 is provided with a pin hole 1001 that matches the locking pin 17. When the bottom end of the locking pin 17 is inserted into the pin hole 1001, the baffle 10 and the guide plate 16 form a circumferential lock.

[0028] Furthermore, the locking pin 17 is connected to a float 15 via a connector 18, which is a flexible pull rope. When the baffle 10 blocks the guide plate 16, the washing solution entering the water storage box 6 gradually accumulates. The float 15 rises with the liquid level and pulls the locking pin 17 through the connector 18, causing the locking pin 17 to retract completely into the water storage box 6. This structure can automatically control the extension and retraction state of the locking pin 17 according to the amount of washing solution accumulated in the water storage box 6 per unit time.

[0029] When a blockage occurs in a certain area of ​​the packing layer 7, the flow rate of the washing solution into the corresponding water storage box 6 decreases per unit time, the liquid level rises slowly, and the float ball 15 cannot pull the locking pin 17 back into the water storage box 6 in time, with the bottom end of the locking pin 17 remaining inserted into the pin hole 1001. At this time, the rotating shaft 4 drives the baffle 10 to rotate. Due to the limiting effect of the locking pin 17 and the pin hole 1001, the baffle 10 cannot rotate circumferentially with the rotating shaft 4. As the rotating shaft 4 continues to rotate, the cooperation between the protrusion 1101 and the guide groove 401 drives the baffle 10 and the guide plate 16 to reciprocate along the axis of the rotating shaft 4. During this process, the blocked guide plate 16 squeezes the washing solution accumulated in the water storage box 6 upward, causing it to spray upward through the guide hole on the top plate of the water storage box 6, achieving targeted reverse flushing of the blocked area of ​​the packing layer 7 from bottom to top.

[0030] The lifting ring 11 and the rotating shaft 4 are elastically connected along the axial direction. In the initial state, the lifting ring 11 is in the lowest position under the action of elastic force, and the protrusion 1101 is located at the bottom end of the guide groove 401. When the rotating shaft 4 rotates, under the premise that the baffle 10 can rotate freely and the lifting ring 11 is constrained by elastic force, the rotating shaft 4 can drive the lifting ring 11 and the baffle 10 to rotate synchronously in the circumferential direction, so as to realize the baffle 10 to perform roving inspection of each area of ​​the packing layer 7.

[0031] In operation, the external motor drives the rotating shaft 4 to rotate intermittently, causing the baffles 10 to rotate sequentially to the bottom of each water storage box 6, and the bottom end of the locking pin 17 to be inserted into the pin hole 1001. At this time, the baffles 10 block the guide plate 16. According to the amount of medicine entering the water storage box 6 per unit time, the float 15 is automatically triggered: if the current detection area is not blocked and the medicine flow is sufficient, the float 15 can quickly rise to the set position, pulling the locking pin 17 out of the pin hole 1001, and the rotating shaft 4 can continue to drive the baffles 10 to rotate for inspection; if the current detection area is blocked, the medicine flow is significantly reduced, the float 15 cannot rise to the unlocked position, the locking pin 17 remains locked with the pin hole 1001, and the baffles 10 are restricted from circumferential rotation by the guide plate 16. At this time, the rotating shaft 4 continues to rotate, and through the cooperation of the protrusion 1101 and the guide groove 401, it drives the lifting ring 11, the baffles 10 and the guide plate 16 to move back and forth along the axis of the rotating shaft 4, performing targeted flushing of the blocked area.

[0032] In actual use, the baffle 10 is evenly provided with multiple through holes. In the initial state, the baffle 10 is located at the bottom of the corresponding water storage box 6, and its through holes are aligned with the guide holes of the guide plate 16, ensuring that the airflow entering the washing tower 2 can smoothly pass through each water storage box 6 and flow upward. When the locking pin 17 is aligned and engaged with the pin hole 1001, the through holes of the baffle 10 and the guide holes of the guide plate 16 are completely misaligned. At this time, the baffle 10 seals and blocks the guide plate 16.

[0033] In summary, this device uses baffles 10 to sequentially block and detect the flow guides 16, enabling automatic identification of the blockage status in each area of ​​the packing layer 7. When a blockage occurs in a certain area, the baffle 10 and the corresponding flow guide 16 form a circumferential lock, and the rotating shaft 4 then drives the baffle 10 and the flow guide 16 to reciprocate axially, performing targeted flushing of the blocked area. Compared to traditional high-pressure water jet flushing or tower top spray flushing, this solution can accurately locate and directionally flush, resulting in higher processing efficiency and better effects. Simultaneously, it avoids excessive scouring of normal areas, effectively protecting the overall performance of the packing layer 7.

[0034] like Figure 1 As shown, the washing tower 2 is equipped with a main pipe 3 on its exterior. The main pipe 3 is connected to a chemical tank and a delivery pump. The washing solution is pressurized by the pump and then sent into the washing tower 2 through the main pipe 3. One end of the main pipe 3 that extends into the washing tower 2 is fixedly connected to the inner wall of the tower. The section of the main pipe 3 located inside the tower is connected to multiple branch pipes, and the nozzles 5 are evenly installed on each branch pipe.

[0035] Combination Figure 2 As shown, the portion of the main pipe 3 located inside the washing tower 2 is provided with an annular section 301, providing passage space for the rotating shaft 4 and achieving structural clearance between the main pipe 3 and the rotating shaft 4. An axially locked and circumferentially rotatable fit is formed between the rotating shaft 4 and the annular section 301; specifically, two sets of retaining rings can be fixed to the outer surface of the rotating shaft 4, with the two sets of retaining rings respectively fitting against the upper and lower end faces of the annular section 301 to achieve axial limiting.

[0036] The washing tower 2 has a drive shaft 9 at its bottom that is connected to the rotating shaft 4. The drive shaft 9 passes through the washing tower 2 and is rotated and sealed with the tower body through a sealed bearing. A right-angle commutator 8 is provided between the drive shaft 9 and the rotating shaft 4. The commutator is composed of a first bevel gear fixed at the end of the rotating shaft 4 and a second bevel gear fixed at the end of the drive shaft 9, which mesh to realize the right-angle steering transmission of power and smoothly input the external driving torque into the rotating shaft 4.

[0037] Combination Figure 3 As shown, a boss 13 is fixedly sleeved on the rotating shaft 4, and an elastic element 12 is connected between the boss 13 and the outer flange of the lifting ring 11; the elastic element 12 is preferably a spring, and the spring is sleeved on the outside of the rotating shaft 4. This structure enables an axial elastic fit between the lifting ring 11 and the rotating shaft 4. When the locking pin 17 does not lock the baffle 10, the lifting ring 11 is stably held at the lowest position of the guide groove 401 under the action of the spring tension, ensuring that the rotating shaft 4 can drive the baffle 10 to rotate normally, realizing the roving inspection of each area of ​​the packing layer 7.

[0038] Depend on Figure 3Furthermore, it can be seen that both sides of the top of the baffle 10 are provided with chamfers 1002. During the circumferential rotation of the baffle 10 with the rotating shaft 4, the chamfers 1002 can contact the extended locking pin 17 and compress it upward, so as to avoid the locking pin 17 from interfering with the rotation of the baffle 10 and ensure smooth operation of the device.

[0039] Combination Figure 5 As shown, a limiting groove 601 is formed on the inner wall of the water storage box 6 in a direction parallel to the axis of the rotating shaft 4; limiting blocks 1601 are fixed on both the inner and outer circular surfaces of the guide plate 16, and the limiting blocks 1601 are slidably engaged with the limiting groove 601. When the limiting block 1601 slides downward to abut against the bottom of the limiting groove 601, it is the limit position of the downward movement of the guide plate 16.

[0040] Combination Figure 7 As shown, the top of the locking pin 17 extends radially to form an annular connecting portion, and a limiting spring is provided between the annular connecting portion and the top of the guide plate 16, so that the locking pin 17 and the guide plate 16 form an axial elastic sliding fit.

[0041] Combination Figure 10 As shown, a limiting part 1602 is fixed at the bottom of the guide plate 16 near the inner and outer circumferential surfaces. The limiting part 1602 is L-shaped and cooperates with the guide plate 16 to form a limiting groove for limiting the baffle 10. When the end of the baffle 10 is inserted between the limiting part 1602 and the guide plate 16, the baffle 10 can drive the guide plate 16 to move synchronously back and forth along the axis of the rotating shaft 4. When the baffle 10 drives the guide plate 16 to move upward, the washing liquid accumulated in the water storage box 6 is squeezed upward to reverse flush the blockage area of ​​the packing layer 7. When the baffle 10 drives the guide plate 16 to move downward and reset, the washing liquid is re-accumulated in the water storage box 6, realizing the cyclic flushing of the blockage area.

[0042] Once the blockage is cleared, the baffle 10 and the guide plate 16 move down to reset, the liquid level in the water storage box 6 rises rapidly, the float 15 floats to the set position and pulls the locking pin 17 to unlock the misalignment of the locking pin 17 and the pin hole 1001; at this time, the rotating shaft 4 rotates again, and the lifting ring 11 can drive the baffle 10 to rotate synchronously in the circumferential direction through the support rod 19, and continue to perform roving inspections on other areas.

[0043] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this application.

Claims

1. A system for decomposing sodium phenolate and refining crude phenol, comprising a washing tower (2) and a packing layer (7) disposed within the washing tower (2), wherein a nozzle (5) is disposed above the packing layer (7), characterized in that, Also includes: A water storage box (6) is located below the packing layer (7) and multiple sets are provided. The projection of the multiple sets of water storage boxes (6) along the axis of the washing tower (2) covers the packing layer (7). The cleaning liquid falling through the packing layer (7) can pass through the water storage box (6). The guide plate (16) is located at the bottom of the water storage box (6) and slides in cooperation with the water storage box (6) along the axial direction of the washing tower (2); The rotating shaft (4) passes through the center of the area enclosed by multiple sets of water storage boxes (6); A baffle (10) is provided below the water storage box (6) and can block the guide plate (16) at the bottom of the water storage box (6); The lifting ring (11) is sleeved on the outside of the rotating shaft (4) and fixed relative to the baffle (10). When the baffle (10) and the guide plate (16) are locked, the baffle (10) and the guide plate (16) can be driven to move synchronously along the axis of the rotating shaft (4) during the rotation of the rotating shaft (4) by the lifting ring (11) so as to squeeze the cleaning liquid accumulated in the water storage box (6) upward.

2. The sodium phenolate decomposition and crude phenol refining system according to claim 1, characterized in that: The top plate of the water storage box (6) and the guide plate (16) are provided with guide holes, and the baffle (10) is uniformly provided with through holes. When the baffle (10) and the guide plate (16) are locked, the through holes are completely offset from the guide holes on the guide plate (16).

3. The sodium phenolate decomposition and crude phenol refining system according to claim 2, characterized in that: The outer circular surface of the rotating shaft (4) is provided with a guide groove (401). The guide groove (401) is composed of two spiral grooves connected end to end, and the projection of the guide groove (401) along the axis of the rotating shaft (4) is a ring. The inner wall of the lifting ring (11) is provided with a protrusion (1101) that slides with the guide groove (401).

4. The sodium phenolate decomposition and crude phenol refining system according to claim 3, characterized in that: A locking pin (17) is provided at the guide plate (16), and the locking pin (17) is elastically engaged with the guide plate (16) along the axis of the rotating shaft (4). The top of the baffle (10) is provided with a pin hole (1001) that engages with the locking pin (17). When the bottom end of the locking pin (17) is inserted into the pin hole (1001), the baffle (10) and the guide plate (16) are locked.

5. The sodium phenolate decomposition and crude phenol refining system according to claim 4, characterized in that: The locking pin (17) is connected to a float (15) via a connector (18). When the through hole is misaligned with the guide hole on the guide plate (16), the float (15) floats to a designated position and can pull the locking pin (17) so that it is misaligned with the pin hole (1001).

6. The sodium phenolate decomposition and crude phenol refining system according to claim 4, characterized in that: Both sides of the top of the baffle (10) are provided with chamfers (1002). During the rotation of the baffle (10) along the circumferential direction of the rotating shaft (4), the locking pin (17) at the guide plate (16) can contact the chamfer (1002) on the baffle (10).

7. The sodium phenolate decomposition and crude phenol refining system according to claim 1, characterized in that: The guide plate (16) has a limiting part (1602) fixed on both sides of the bottom. The limiting part (1602) is set as an L-shape, so that a limiting groove is formed between the limiting part (1602) and the guide plate (16) to limit the baffle (10).

8. The sodium phenolate decomposition and crude phenol refining system according to claim 1, characterized in that: The washing tower (2) is provided with a main pipe (3) outside, and the part of the main pipe (3) extending into the washing tower (2) is connected to a branch pipe, and the nozzle (5) is installed on the branch pipe.

9. The sodium phenolate decomposition and crude phenol refining system according to claim 1, characterized in that: The washing tower (2) is equipped with a drive shaft (9) that cooperates with the rotating shaft (4). The drive shaft (9) and the rotating shaft (4) are connected by a right-angle commutator (8).

10. The sodium phenolate decomposition and crude phenol refining system according to claim 1, characterized in that: The washing tower (2) is fixed with a support plate (14), which is a mesh structure, and the packing layer (7) rests on the support plate (14).

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