A washing and phenol removal device and method

Abstract

This invention relates to the field of phenol removal technology, specifically disclosing a phenol removal device and method, including a first washing tank for pre-pump mixing phenol removal washing, a second washing tank for spray phenol removal washing, and a suction and stirring device for conveying unwashed mixture and dilute alkali into the first washing tank; the suction and stirring device includes a mounting frame, a first pipe and a second pipe fixedly installed by the mounting frame, a stirring pipe rotatably and sealed between the first pipe and the second pipe, an unwashed mixture feed pipe and a dilute alkali feed pipe connected to the end of the first pipe, and a mixed liquid discharge pipe connected to the end of the second pipe; a piston tube body is connected to the side wall of the first pipe, a piston is slidably and sealedly connected to the piston tube body, a piston rod is fixedly connected to the piston, the end of the piston rod extends out of the piston tube body, a plurality of gear teeth are evenly provided on the side wall of the stirring pipe, a rack that can mesh with the gear teeth is provided below the stirring pipe, and a drive mechanism that can drive the piston rod and the rack to reciprocate.

Description

Technical Field

[0001] This application relates to the field of washing and phenol removal technology, and specifically discloses a washing and phenol removal device and method. Background Technology

[0002] Currently in the metallurgical coking industry, the phenol removal washing of distillate fractions is a process of extracting phenol from phenol oil, naphthalene oil, or unwashed phenol-naphthalene mixtures obtained by tar distillation using a 12% NaOH solution. If the unwashed mixture is mixed with the 12% NaOH solution, the phenol in the unwashed mixture will react with the alkali to form water-soluble sodium phenolate. Through static treatment, oil-water separation can be achieved with the phenol removal mixture. This process is further divided into two types: pre-pump mixing and direct spraying.

[0003] The pre-pump mixing phenol removal washing process is as follows: Unwashed mixed components and dilute alkali are mixed before the mixed component conveying pump. After being stirred by the pump, the phenol in the unwashed mixed components will react with the alkali to obtain sodium phenolate. After the phenol removal mixed components are separated, they enter the continuous washing separation tower for static oil-water separation of sodium phenolate and phenol removal mixed components. The bottom is the phenol removal washed product sodium phenolate, and the top is the washed mixed components. This washing process generally needs to be repeated multiple times to meet the standard.

[0004] The process of spray-type phenol removal washing is as follows: Unwashed mixture and dilute alkali are pumped into the washing tower separately. Unwashed mixture enters the distribution plate at the bottom of the washing tower and is sprayed upwards, while dilute alkali enters the distribution plate at the top of the washing tower and is sprayed downwards. Unwashed mixture and dilute alkali come into convective contact in the tower. Phenol in unwashed mixture reacts with alkali to produce sodium phenolate and dephenolized mixture. Sodium phenolate flows out from the bottom of the clarified liquid column below the distribution plate at the bottom of the tower through a liquid seal pipe, while dephenolized mixture flows out from the top of the clarified liquid column above the distribution plate at the top of the tower. The reaction efficiency of spray-type phenol removal washing process is not as high as that of pre-pump mixing washing process, and it is generally used for fractions with low phenol content.

[0005] In existing washing and phenol removal processes, the unwashed mixture and dilute alkali are usually only stirred by a pump. However, the residence time of the unwashed mixture and dilute alkali in the pump is relatively short, resulting in a short stirring time. Although the unwashed mixture and dilute alkali are mixed after passing through the pump, the lack of stirring process makes the reaction between the unwashed mixture and dilute alkali insufficient, increasing the number of washing cycles and thus reducing washing efficiency.

[0006] Therefore, the inventors have provided a washing and phenol removal device and method to solve the above-mentioned problems. Summary of the Invention

[0007] The purpose of this invention is to solve the problem that the traditional method of mixing unwashed mixtures with dilute alkali for a short time results in insufficient reaction between the unwashed mixtures and dilute alkali.

[0008] To achieve the above objectives, the basic solution of the present invention provides a washing and dephenolizing device and method, including a first washing tank for pre-pump mixing dephenolizing washing, a second washing tank for spray dephenolizing washing, and a suction and stirring device for conveying unwashed mixed components and dilute alkali into the first washing tank.

[0009] The suction and stirring equipment includes a mounting frame, a first pipe and a second pipe fixedly installed by the mounting frame, a stirring pipe rotatably and sealed between the first pipe and the second pipe, and an unwashed mixed component feed pipe and a dilute alkali feed pipe connected to the end of the first pipe, and a mixed liquid discharge pipe connected to the end of the second pipe.

[0010] The first pipe has a piston tube body connected to its side wall, a piston is slidably and sealed inside the piston tube body, a piston rod is fixedly connected to the piston, the end of the piston rod extends out of the piston tube body, a number of gear teeth are evenly provided on the side wall of the stirring pipe, a rack that can mesh with the gear teeth is provided below the stirring pipe, and a drive mechanism that can drive the piston rod and the rack to reciprocate is also included.

[0011] The principle and effect of this basic scheme are as follows:

[0012] 1. This invention fully utilizes the advantages and disadvantages of both pre-pump mixed phenol removal washing and counter-spray phenol removal washing. By performing pre-pump mixed phenol removal washing first and then counter-spray phenol removal washing, it is easier to obtain products that meet the standards.

[0013] 2. The present invention is equipped with a suction and stirring device, which can stir and mix the unwashed mixture and dilute alkali for a long time after extraction, so that the unwashed mixture and dilute alkali can react fully and further improve the washable phenol removal effect.

[0014] 3. This invention drives the piston rod and rack to move simultaneously through a drive mechanism. By utilizing the reciprocating motion of the piston rod and the meshing between the rack and the gear teeth, the unwashed mixture and dilute alkali are extracted, while the stirring pipe rotates. A single power source can simultaneously achieve the purpose of extracting the unwashed mixture and dilute alkali and mixing and stirring the unwashed mixture and dilute alkali. The control is simple and the installation and maintenance costs are lower.

[0015] Furthermore, the driving mechanism includes a hydraulic cylinder and a connecting frame located at the end of the hydraulic cylinder. The piston rod and rack ends are both fixedly connected to the connecting frame. The hydraulic cylinder drives the connecting frame to reciprocate, which in turn drives the piston rod and rack to reciprocate simultaneously, thereby achieving simultaneous extraction and mixing of the unwashed mixture and dilute alkali.

[0016] Furthermore, the stirring pipe is equipped with a sealing plate and a fixed plate, and a planetary gear mechanism is provided between the sealing plate and the fixed plate. The gear ring of the planetary gear mechanism is fixedly connected to the inner wall of the stirring pipe. The sun gear and planet gears of the planetary gear mechanism are rotatably connected between the sealing plate and the fixed plate. The sun gear is coaxially connected to a stirring shaft. One end of the stirring shaft passes through the fixed plate and has several stirring strips evenly provided on its surface. Several feeding pipes that can accommodate the mixture are provided between the fixed plate and the sealing plate. One end of the feeding pipe passes through the fixed plate and has several liquid outlet holes evenly provided on its surface. Through the planetary gear mechanism, the rotation of the stirring pipe causes the sun gear inside to rotate under the drive of the gear ring and planet gears, which in turn drives the stirring shaft to rotate. The stirring shaft and stirring strips further enhance the mixing effect between the unwashed mixture and the dilute alkali.

[0017] Furthermore, the feeding pipe is coaxially arranged with the planetary gears in the planetary gear mechanism and rotates synchronously with them. Each planetary gear has a limiting groove on its sidewall near the fixed plate, and the fixed plate has a limiting strip that matches the limiting groove. By coaxially arranging the feeding pipe with the planetary gears, the feeding pipe can also rotate. The mixture formed by the unwashed mixture and dilute alkali can be ejected from the outlet hole using the centrifugal force of the rotation, preventing the mixture from accumulating in one location and further improving the mixing effect, thus ensuring a complete reaction between the unwashed mixture and the dilute alkali.

[0018] Furthermore, the sealing plate has several slots on its side wall near the fixing plate, and the fixing plate has locking blocks that fit into the slots on its side wall. The slots and locking blocks cooperate with each other to prevent the fixing plate from rotating and to limit its position.

[0019] Furthermore, the end of the fixed plate is provided with several rings that can be inserted into each of the feed tubes. The rings can improve the sealing performance between the fixed plate and the planetary gear mechanism.

[0020] Furthermore, the other end of the stirring shaft is detachably connected to a mounting base through a fixed plate. The mounting base has several blades evenly distributed around its perimeter that brush against the surface of the fixed plate. The mounting base can restrict the position of the sun gear, and the blades can catch the unwashed mixture and dilute alkali at the bottom of the first pipe, allowing it to enter the feed pipe.

[0021] Furthermore, it also includes a guide rail that allows the rack to slide. The guide rail serves to limit and guide the sliding of the rack.

[0022] Furthermore, the second washing tank includes a top tank, an upper distribution plate, a middle tank, a lower distribution plate, and a bottom tank that are sealed together. The top tank is connected to a mixed component discharge pipe, and the bottom tank is connected to a sodium phenolate discharge pipe. The upper distribution plate has a cavity and is connected to several mixed component feed branch pipes, and the lower distribution plate also has a cavity and is connected to several dilute alkali feed branch pipes. Both the upper and lower distribution plates have through holes running vertically through them. The lower surface of the upper distribution plate and the upper surface of the lower distribution plate are each provided with a liquid outlet nozzle that communicates with their respective cavities. The connection of multiple mixed component feed branch pipes and dilute alkali feed branch pipes between the upper and lower distribution plates allows for a more uniform distribution of the mixed component or dilute alkali entering the cavity, thereby improving the effect of spray-type phenol removal washing.

[0023] Based on the same inventive concept, the present invention provides a washing and phenol removal method, comprising using the above-described apparatus to wash and remove phenol from an unwashed mixture according to the following steps:

[0024] The first step involves using a suction and stirring device to extract the unwashed mixture and dilute alkali, and then thoroughly stirring them in the stirring pipe to ensure a complete reaction.

[0025] The second step involves allowing the fully reacted mixture to settle and separate into layers in the first washing tank.

[0026] The third step involves discharging the sodium phenolate obtained from the bottom of the first washing tank after phenol removal and washing, and then feeding the washed mixture from the top into the upper distribution plate of the second washing pipe through the mixed mixture feed branch pipe. Dilute alkali is then introduced into the lower distribution plate of the second washing tank for spray-type phenol removal washing.

[0027] Step four: The mixture in the second washing tank separates into layers with the sodium phenolate.

[0028] Fifth step: After the mixture and sodium phenolate have settled and separated into layers, they are discharged separately.

[0029] Compared with existing technologies, this invention fully utilizes the advantages and disadvantages of pre-pump mixing-type phenol removal washing and spray-type phenol removal washing to form a new washing and phenol removal device and method. Furthermore, by improving the suction and stirring equipment and the second washing tank, the mixing time and effect of the unwashed mixture and dilute alkali are increased, resulting in a more complete reaction between the unwashed mixture and dilute alkali. Moreover, the installation of multiple mixing component feed branches and dilute alkali feed branches on the periphery of the upper and lower distribution plates ensures that the mixture or dilute alkali entering the cavity is more uniform, further improving the washing and phenol removal effect and making it easier to obtain products that meet the standards. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of a washing and dephenolizing device according to an embodiment of this application is shown;

[0032] Figure 2 This paper shows an isometric view of the suction and stirring device in a washing and phenol removal apparatus according to an embodiment of this application;

[0033] Figure 3 This illustration shows a partial structural diagram of the suction and stirring device in a washing and phenol removal apparatus according to an embodiment of this application;

[0034] Figure 4 An embodiment of the present application illustrates a washing and dephenolizing device. Figure 3 Schematic diagram of the internal structure of section A;

[0035] Figure 5 A schematic diagram of the fixing plate of a washing and dephenolizing device according to an embodiment of this application is shown;

[0036] Figure 6 This paper shows a schematic diagram of the internal structure of the stirring pipe of a washing and dephenolizing device according to an embodiment of this application;

[0037] Figure 7 A schematic diagram of the second washing tank of a washing and dephenolizing device according to an embodiment of this application is shown. Detailed Implementation

[0038] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0039] The reference numerals in the accompanying drawings include: 1. Unwashed mixture; 2. Dilute alkali; 3. Suction and stirring equipment; 301. Mounting frame; 302. First pipe; 303. Stirring pipe; 304. Second pipe; 305. Hydraulic cylinder; 306. Connecting frame; 307. Piston rod; 308. Piston tube body; 309. Unwashed mixture feed pipe; 310. Dilute alkali feed pipe; 311. Mixture discharge pipe; 312. Guide rail; 313. Rack; 314. Gear tooth; 315. Mounting base; 316. Lever; 317. Fixing plate. 318 Sun gear, 319 Planet gear, 320 Gear ring, 321 Sealing plate, 322 Slot, 323 Block, 324 Limiting strip, 325 Ring sleeve, 4 First washing tank, 5 Interface regulator, 6 Sodium phenolate discharge pipe, 7 Second washing tank, 701 Bottom tank, 702 Middle tank, 703 Top tank, 704 Lower distribution plate, 705 Upper distribution plate, 706 Dilute alkali feed branch pipe, 707 Discharge nozzle, 708 Mixed component feed branch pipe, 8 Mixed component discharge pipe.

[0040] A washing and phenol removal device, implementing, for example Figure 1 As shown: It includes a suction and stirring device 3, a first washing tank 4, and a second washing tank 7. The suction and stirring device 3 extracts the unwashed mixture 1 and dilute alkali 2 and stirs them to make the unwashed mixture 1 and dilute alkali 2 fully mix and react. Then it is transported to the first washing tank 4. After settling and stratification in the first washing tube, it is discharged. The bottom is the sodium phenolate after phenol removal and the top is the washed mixture. A full flow loop is set on the side wall of the first washing tank 4, and an interface regulator 5 is set on the full flow loop.

[0041] The top of the first washing tank 4 is connected to a mixed component discharge pipe 8 and is equipped with a pump and an electrically controlled valve. The top of the second washing tank 7 is also connected to the mixed component discharge pipe 8 and is equipped with a pump and an electrically controlled valve. The bottom of the first washing tank 4 is connected to a sodium phenolate discharge pipe 6 and is equipped with a pump and an electrically controlled valve. The second washing tank 7 is also connected to the sodium phenolate discharge pipe 6 and is equipped with a pump and an electrically controlled valve.

[0042] The pump body and electrically controlled valves are used to control the opening or closing of various pipelines and are uniformly controlled by the controller.

[0043] The first washing tank 4 washes the unwashed mixture using a pre-pump mixing phenol removal washing process. If the standard of the washed mixture meets the requirements, it can be directly discharged for the next processing. If the standard of the washed mixture does not meet the requirements, the washed mixture is washed again using a spray-type phenol removal washing process in the second washing tank 7.

[0044] To improve the stirring time and stirring effect of unwashed mixture 1 and dilute alkali 2, the following method is adopted: Figure 2The suction and stirring device 3 shown extracts and stirs the unwashed mixture 1 and dilute alkali 2. The suction and stirring device 3 includes a mounting frame 301, a first pipe 302 and a second pipe 304 fixedly installed by the mounting frame 301, and a stirring pipe 303 between the first pipe 302 and the second pipe 304.

[0045] The first pipe 302 is equipped with a three-way interface. One end of the three-way interface is equipped with a piston tube 308, in which a piston is slidably and sealed. A piston rod 307 is fixedly connected to the piston, with one end of the piston rod 307 extending out of the end of the piston tube 308. A hydraulic cylinder 305 is installed near the mounting bracket 301 or on the ground as a driving mechanism. The output end of the hydraulic cylinder 305 is installed and fixed to the end of the piston rod 307 through a connecting bracket 306, which allows the hydraulic cylinder 305 to drive the piston rod 307 to reciprocate. The other end of the three-way interface is closed and connected to the unwashed mixture feed pipe 309. One-way valves are installed on the dilute alkali feed pipe 310, the unwashed mixture feed pipe 309, and the dilute alkali feed pipe 310. The ends of the unwashed mixture feed pipe 309 and the dilute alkali feed pipe 310 are respectively submerged below the liquid surface of the unwashed mixture 1 and the dilute alkali 2, so that the unwashed mixture 1 and the dilute alkali 2 can only flow into the first pipe 302 and cannot flow out of the first pipe 302. The last end of the three-way interface is connected to the stirring pipe 303. By using the reciprocating motion of the piston rod 307, the unwashed mixture 1 and the dilute alkali 2 can be drawn into the first pipe 302 and stirred through the first pipe 302.

[0046] The two ends of the stirring pipe 303 are rotatably and sealed to the first pipe 302 and the second pipe 304, respectively. A ring of gear teeth 314 is provided on the inner wall of the stirring pipe 303. A guide rail 312 is fixedly installed near the mounting bracket 301 or on the ground. A rack 313 is slidably connected to the guide rail 312. The rack 313 meshes with the gear teeth 314. The end of the rack 313 is also fixed to the output end of the hydraulic cylinder 305 through the connecting bracket 306, so that the hydraulic cylinder 305 can drive the rack 313 to slide back and forth on the guide rail 312, thereby causing the meshing of the rack 313 with the gear teeth 314 to drive the stirring pipe 303 to rotate back and forth.

[0047] like Figures 3 to 6As shown, a first mounting groove is formed around the inner wall of the first pipe 302 at one end of the stirring pipe 303 near the first pipe 302. A sealing plate 321 is integrally formed or welded to the bottom of the first mounting groove. A gear ring 320 is integrally formed on the inner wall of the first mounting groove. A sun gear 318 and three planet gears 319 are detachably connected inside the stirring pipe 303. The sun gear 318, planet gears 319 and gear ring 320 form a planetary gear mechanism. A stirring shaft is fixed at the center of the sun gear 318. One end of the stirring shaft passes through the sealing plate 321 and extends into the other end of the stirring pipe 303, and several stirring strips are evenly provided on its surface. A feeding pipe is fixed at the center of each planet gear 319. One end of the feeding pipe is flush with the side of the planet gear 319 and has an opening. The other end of the feeding pipe passes through the sealing plate 321 and extends into the other end of the stirring pipe 303, and several liquid outlet holes are evenly provided on its surface.

[0048] A fixing plate 317 can also be detachably connected within the first mounting slot. Three slots 322 are provided on the side of the sealing plate 321 near the planetary gear mechanism. Three locking blocks 323 on the fixing plate 317 engage with the slots 322 to prevent rotation of the fixing plate 317. A limiting groove is provided on the side of each planetary gear. A limiting strip 324 is provided on the side wall of the fixing plate 317 to engage with the limiting groove. Through holes are provided at the connection between the sealing plate 321 and the planetary gear to allow the mixed liquid to flow into the feed pipe. When the fixing plate 317 is installed in the first mounting slot, the limiting strip 324 engages with the limiting groove, and the locking blocks 323 engage with the slots 322, thus supporting and limiting the planetary gears. This allows the planetary gears to rotate in their original position under the drive of the gear ring 320. To improve the sealing performance between the fixing plate 317 and the planetary gear mechanism, the fixing plate 317... All through holes on the plate are provided with rings 325. When the fixing plate 317 is installed into the first mounting groove, the three rings 325 are inserted into the inner walls of the three feeding pipes and make close contact with them. The sealing performance can be improved by the sealing rings at the ends. A mounting hole is opened in the center of the fixing plate 317. The end of the stirring shaft at the center of the sun wheel 318 near the fixing plate 317 passes through the mounting hole and is detachably connected to the mounting seat 315 by riveting. The mounting seat 315 is provided with three levers 316 around its circumference. Each lever 316 is provided with a lever 316 blade. The levers 316 are in close contact with the side wall of the fixing plate 317. The mounting seat 315 and levers 316 not only limit the position of the sun wheel 318, but also drive the levers 316 to move during the rotation of the sun wheel 318, bringing the mixture in the first pipe 302 into the rings 325 through the through holes.

[0049] The end of the first pipe 302 is inserted into the first mounting groove of the mixing pipe 303, and the fixing plate 317 is completely pressed against it, so that the first pipe 302 and the mixing pipe 303 are pressed together. The second pipe 304 is provided with a second mounting groove on the side near the mixing pipe 303. The end of the mixing pipe 303 near the second pipe 304 is inserted into the second mounting groove of the second pipe 304, so that the mixing pipe 303 and the second pipe 304 are pressed together. The first pipe 302 and the second pipe 304 are both fixed by the mounting bracket 301, so that the first pipe 302 and the second pipe 304 are relatively fixed, which can limit the two ends of the mixing pipe 303 and prevent it from falling off. The end of the second pipe 304 is provided with a mixed liquid outlet pipe 311.

[0050] The controller starts the hydraulic cylinder 305, which simultaneously drives the piston rod 307 and rack 313 to reciprocate. The reciprocating motion of the piston rod 307 draws the unwashed mixture 1 and dilute alkali 2 into the first pipe 302. As the mixture in the first pipe 302 gradually increases, it reaches the through hole of the fixed plate 317 and flows into the feeding pipe, thus entering the mixing pipe 303. Meanwhile, the reciprocating motion of the rack 313, with its meshing with the gear teeth 314, drives the mixing pipe 303 to rotate. The entire mixing pipe 303 rotates, which... The mixing pipe 303 has a mixing and stirring effect on the mixture. At the same time, the rotation of the mixing pipe 303 drives the gear ring 320 to rotate, which in turn drives the planetary gear 319 and the sun gear 318 to rotate. The rotation of the sun gear 318 can drive the stirring shaft to rotate, so that the stirring bar can stir the mixture in the mixing pipe 303 and improve the stirring effect of the mixture. On the other hand, it can also drive the mounting base 315 to rotate, so that the lever 316 is driven to move, which brings the mixture in the first pipe 302 into the ring sleeve 325 through the through hole, thereby improving the efficiency of the mixture entering the mixing pipe 303.

[0051] To improve the contact effect between the washing mixture and dilute alkali 2 during the spray-type phenol removal washing process in the second washing tank 7, the second washing tank 7 is configured as follows: Figure 7As shown, the second washing tank 7 is divided into three parts: a top tank 703, a middle tank 702, and a bottom tank 701. The top tank 703 is connected to a mixed component discharge pipe, and the bottom tank 701 is connected to a sodium phenolate discharge pipe 6. An upper distribution plate 705 is provided between the top tank 703 and the middle tank 702, and a lower distribution plate 704 is provided between the bottom tank 701 and the middle tank 702. The top tank 703, upper distribution plate 705, middle tank 702, lower distribution plate 704, and bottom tank 701 are mutually sealed. Several mixed component feed branch pipes 708 are provided on the side wall of the upper distribution plate 705. All mixed component feed branch pipes 708 are connected to the top of the first washing tank 4. The mixed component discharge pipe 8 is connected. Several dilute alkali feed branch pipes 706 are provided on the side wall of the lower distribution plate 704. All dilute alkali feed branch pipes 706 are connected to the dilute alkali 2 solution. Both the upper distribution plate 705 and the lower distribution plate 704 are provided with through holes that run vertically through the plate to allow the mixed component or sodium phenolate to pass through. A cavity is provided inside the upper distribution plate 705. This cavity is connected to the mixed component feed branch pipe 708 but not to the through holes. The lower distribution plate 704 is also provided with a cavity. Similarly, this cavity is connected to the dilute alkali feed branch pipe 706 but not to the through holes. Several liquid outlet nozzles 707 connected to the cavity are provided on the lower surface of the upper distribution plate 705. Liquid outlet nozzles 707 connected to the cavity are also provided on the upper surface of the lower distribution plate 704.

[0052] By configuring the second washing tank 7 as a top tank 703, an upper distribution plate 705, a middle tank 702, a lower distribution plate 704, and a bottom tank 701, multiple mixing feed branch pipes 708 and dilute alkali feed branch pipes 706 can be installed around the upper distribution plate 705 and the lower distribution plate 704. This allows the mixing components or dilute alkali 2 entering the cavity to be more uniform and ensures the sealing performance between them, thereby improving the effect of spray-type phenol removal washing.

[0053] The present invention employs the following process steps for washing and phenol removal, namely, a washing and phenol removal method as follows:

[0054] The first step involves starting the hydraulic cylinder 305, using the reciprocating motion of the piston to extract the unwashed mixture 1 and dilute alkali 2, allowing them to enter the stirring pipe 303 through the first pipe 302. Simultaneously, the rack 313 and gear 314 cause the stirring pipe 303 to rotate, and the planetary gear mechanism enhances the stirring and mixing effect of the unwashed mixture 1 and dilute alkali 2, thereby enabling the unwashed mixture 1 and dilute alkali 2 to react fully.

[0055] The second step involves allowing the fully reacted mixture to settle and separate into layers within the first washing tank 4.

[0056] The third step involves discharging the sodium phenolate obtained from the bottom of the first washing tank 4 after phenol removal and washing, and allowing the washed mixture obtained from the top to enter the upper distribution plate 705 of the second washing pipe through the mixed mixture feed branch pipe 708. Dilute alkali 2 is then introduced into the lower distribution plate 704 of the second washing tank 7 for spray-type phenol removal washing.

[0057] Step 4: The mixture in the second washing tank 7 separates into layers with the sodium phenolate.

[0058] In the fifth step, after the mixture and sodium phenolate have settled and separated into layers, they are discharged from the mixture discharge pipe 8 and the sodium phenolate discharge pipe 6, respectively.

[0059] During implementation, the entire process can be controlled by a PLC controller and a microcontroller controller, eliminating the need for manual control and adjustment, thus achieving a high degree of automation.

[0060] Compared with the prior art, the present invention makes full use of the advantages and disadvantages of pre-pump mixing dephenolization washing and spray dephenolization washing, thereby forming a new washing and dephenolization device and method. Furthermore, by improving the suction and stirring device 3 and the second washing tank 7, the mixing time and effect of unwashed mixed component 1 and dilute alkali 2 are improved, thereby making the reaction between unwashed mixed component 1 and dilute alkali 2 more complete. Moreover, by installing multiple mixed component feed branch pipes 708 and dilute alkali feed branch pipes 706 around the upper distribution plate 705 and the lower distribution plate 704, the mixed component or dilute alkali 2 entering the cavity can be more uniform, further improving the washing and dephenolization effect and making it easier to obtain products that meet the standards.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A washing and phenol removal device, characterized in that: It includes a first washing tank for pre-pump mixing phenol removal washing, a second washing tank for spray phenol removal washing, and a suction and stirring device for conveying the unwashed mixture and dilute alkali into the first washing tank; The suction and stirring equipment includes a mounting frame, a first pipe and a second pipe fixedly installed by the mounting frame, a stirring pipe rotatably and sealed between the first pipe and the second pipe, and an unwashed mixed component feed pipe and a dilute alkali feed pipe connected to the end of the first pipe, and a mixed liquid discharge pipe connected to the end of the second pipe. The first pipe sidewall is connected to a piston tube body, a piston is slidably and sealed inside the piston tube body, a piston rod is fixedly connected to the piston, the end of the piston rod extends out of the piston tube body, a number of gear teeth are evenly provided on the sidewall of the stirring pipe, a rack that can mesh with the gear teeth is provided below the stirring pipe, and a drive mechanism that can drive the piston rod and the rack to reciprocate. The stirring pipe is equipped with a sealing plate and a fixing plate. A planetary gear mechanism is provided between the sealing plate and the fixing plate. The gear ring of the planetary gear mechanism is fixedly connected to the inner wall of the stirring pipe. The sun gear and planet gears of the planetary gear mechanism are rotatably connected between the sealing plate and the fixing plate. The sun gear is coaxially connected to a stirring shaft. One end of the stirring shaft passes through the fixing plate and has several stirring strips evenly provided on its surface. Several feeding pipes that can accommodate the mixture are provided between the fixing plate and the sealing plate. One end of the feeding pipe passes through the fixing plate and has several liquid outlet holes evenly provided on its surface. The feeding pipes are coaxially arranged with the planet gears in the planetary gear mechanism and rotate synchronously with the planet gears.

2. The washing and phenol removal device according to claim 1, characterized in that, The drive mechanism includes a hydraulic cylinder and a connecting frame located at the end of the hydraulic cylinder. The piston rod and the rack end are both fixedly connected to the connecting frame.

3. The washing and phenol removal device according to claim 1, characterized in that, The planetary gears are provided with limiting grooves on the side wall near the fixed plate, and the fixed plate is provided with limiting strips that are adapted to the limiting grooves.

4. The washing and phenol removal device according to claim 3, characterized in that, The sealing plate has several slots on the side wall near the fixing plate, and the fixing plate has a block that matches the slots on the side wall.

5. The washing and phenol removal device according to claim 1, characterized in that, The end of the fixed plate is provided with several rings that can be inserted into each of the feeding tubes.

6. The washing and phenol removal device according to claim 1, characterized in that, The other end of the stirring shaft is detachably connected to a mounting base through a fixed plate. Several blades that brush against the surface of the fixed plate are evenly arranged around the periphery of the mounting base.

7. The washing and phenol removal device according to claim 1, characterized in that, It also includes a guide rail that allows the rack and pinion to slide.

8. The washing and phenol removal device according to claim 1, characterized in that, The second washing tank includes a top tank, an upper distribution plate, a middle tank, a lower distribution plate, and a bottom tank that are sealed together. The top tank is connected to a mixed component discharge pipe, and the bottom tank is connected to a sodium phenolate discharge pipe. The upper distribution plate has a cavity and is connected to several mixed component feed branch pipes. The lower distribution plate also has a cavity and is connected to several dilute alkali feed branch pipes. Both the upper and lower distribution plates have through holes running vertically through them. The lower surface of the upper distribution plate and the upper surface of the lower distribution plate are each provided with a liquid outlet nozzle that communicates with their respective cavities.

9. A washing and phenol removal method, characterized in that, This includes washing and dephenolizing the unwashed mixture using the apparatus described in any one of claims 1 to 8, following these steps: The first step is to extract the unwashed mixture and dilute alkali using a suction and stirring device, and to fully stir the unwashed mixture and dilute alkali in the stirring pipe so that the unwashed mixture and dilute alkali can react fully. The second step involves allowing the fully reacted mixture to settle and separate into layers in the first washing tank. The third step is to discharge the sodium phenolate obtained from the bottom of the first washing tank after phenol removal and wash, and to introduce the mixed portion obtained from the top after washing into the upper distribution plate of the second washing pipe through the mixed portion feed branch pipe, and to introduce dilute alkali into the lower distribution plate of the second washing tank for spray-type phenol removal washing. Step 4: The mixture in the second washing tank separates into layers with the sodium phenolate. Fifth step: After the mixture and sodium phenolate have settled and separated into layers, they are discharged separately.

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