A phenol tar graded purification device

Abstract

The invention relates to the technical field of recycling and utilizing chemical production waste, in particular to a phenol tar graded purification device, which comprises a reactor and an auxiliary platform, wherein a stirring and mixing component is provided on the top of the reactor, and a condensation reflux component is provided on the side end of the stirring and mixing component on the top of the reactor. The condensation reflux components are provided in plurality, and the tops of the plurality of condensation reflux components are connected to a tail gas pipe. By arranging a first condensation unit and a second condensation unit, phenol vapor in waste gas generated during chemical purification in the reactor during the purification process of phenol tar is recovered, the first condensation unit is used for condensation recovery of phenol vapor in a regular manner, and the second condensation unit is used for emergency standby phenol vapor recovery, and the first condensation unit and the second condensation unit cooperate to clean scale and discharge scaled residual phenol liquid, so as to improve the recovery rate of phenol vapor in tail gas.

Description

Technical Field

[0001] The invention relates to the technical field of recycling chemical production waste, in particular to a phenol tar classification and purification device. Background Art

[0002] The purification of phenol tar often requires pretreatment to remove solid impurities, followed by a vacuum distillation process to separate the low-boiling point components in the phenol tar, followed by a chemical purification process to separate the neutral oil impurities, followed by adsorption and decolorization to adsorb colored impurities, and finally crystallization purification to obtain high-purity phenol, thereby completing the efficient recovery of phenol in phenol tar.

[0003] Chinese patent application number CN202121315127.4 discloses a formic acid volatilization condensation recovery device and reactor, comprising a condenser, an inlet pipe, an outlet pipe, a valve, and a reflux valve. The condenser comprises a housing for mounting on the reactor's outlet pipe and a condenser tube disposed within the housing; the condenser tube is closely attached to the outer wall of the outlet pipe; one end of the condenser tube serves as a water inlet, while the other end serves as a water outlet. The inlet pipe communicates with the condenser's water inlet. However, during use, the condenser tube can become fouled, reducing heat exchange efficiency.

[0004] In the process of chemical purification of phenol tar, a reactor is usually required for alkaline washing and acidification chemical treatment. The material of the reactor is selected from enamel or stainless steel. In this process, phenol vapor and acidic waste gas are generated. In industrial treatment, the waste gas is usually input into a condensation reflux tank to recover the phenol vapor, and then the recovered phenol vapor is sent back to the reactor for treatment. The process is complicated. When a conventional condensation reflux device is equipped on the top of the reactor, scale will form inside the equipment, requiring regular disassembly and cleaning, which affects the continuous purification of phenol tar. In addition, the condensation elbow of the conventional condensation reflux device is in direct contact with the waste gas. When scale is generated on the surface of the elbow, it is difficult to clean. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a phenol tar graded purification device.

[0006] A phenol tar graded purification device of the present invention comprises a reactor and an auxiliary platform, wherein a stirring and mixing component is provided on the top of the reactor, and a condensation reflux component is provided on the side end of the stirring and mixing component on the top of the reactor, wherein a plurality of condensation reflux components are provided, and the tops of the plurality of condensation reflux components are connected to the tail gas pipe;

[0007] The condensation reflux component includes a first condensation unit and a second condensation unit, wherein the second condensation unit is a standby emergency condensation unit. The waste gas generated during the phenol tar purification process is condensed and recovered with the assistance of the condensation reflux component.

[0008] Preferably, the first condensation unit includes a first condensation tube, the lower end of the first condensation tube is connected to the upper end of the reactor, the upper end of the first condensation tube is connected to the second condensation unit, an elastic filter is provided at the lower inner side of the first condensation tube, the cross-section of the elastic filter is in an eight-shaped shape, the first condensation tube is provided with a plurality of slag discharge ports at corresponding positions of the elastic filter, and a collecting ring is provided at the outer side of the first condensation tube at corresponding positions of the slag discharge ports, and the collecting ring is detachable.

[0009] Preferably, an anti-outflow ring is provided above the slag discharge port on a side close to the elastic filter screen, and a convex ring is provided at the lower end of the slag discharge port on a side close to the elastic filter screen;

[0010] After the collecting ring is installed, the slag discharge port of the first condenser pipe is no longer connected to the outside.

[0011] Preferably, a cooling pipe is spirally arranged around the outer side of the first condenser tube, and the cooling pipe is divided into two parts, an upper part and an lower part, a connector is arranged between the cooling pipes of the upper and lower parts, an elastic ball is arranged inside the connector, a limiting rod is arranged at the side end of the elastic ball, a water passage is arranged inside the connector, a limiting hole is arranged at the side end of the water passage on the inner wall of the connector, the limiting rod slides in the limiting hole, and a liquid that expands easily when heated is arranged in the limiting hole, an elastic ball placement groove is provided on the inner wall of the connector at the side end of the water passage, the elastic ball is located in the elastic ball placement groove, and the elastic ball placement groove is located on the opposite side of the limiting hole.

[0012] Preferably, the second condensation unit includes a second condensation tube, the upper end of the second condensation tube is connected to the exhaust pipe, the lower end of the second condensation tube is connected to the first condensation unit, the lower end of the second condensation tube is provided with an annular limiting groove, an annular shell is provided in the annular limiting groove for sliding up and down, and a nylon brush ring is provided on the side of the lower end of the annular shell close to the outside of the second condensation tube.

[0013] Preferably, a cooling inner tube is provided in the annular shell, and the cooling inner tube is arranged in an S shape in the annular shell. A piston ring is provided at the upper end of the annular shell, and a water inlet is provided on the piston ring. An electrically controlled pressure valve is provided in the water inlet. One end of the cooling inner tube is connected to the water inlet, and the other end of the cooling inner tube passes through the piston ring. A spring is provided between the lower end of the piston ring and the annular limit groove.

[0014] Preferably, the second condenser is provided with a drainage channel on the upper part of the annular limiting groove, the drainage channel is L-shaped, the cooling inner tube passes through one end of the piston ring and slides in the drainage channel, and the second condenser is provided with a drainage pipe on the outside of the drainage channel.

[0015] Preferably, a water inlet branch pipe is provided on the second condenser pipe, the lower end of the water inlet branch pipe is connected to the cooling pipe, and the upper end of the water inlet branch pipe is connected to the upper part of the annular limiting groove.

[0016] Preferably, the top of the reactor is also provided with multiple feed ports, the lower end of the reactor is provided with a discharge port, the stirring and mixing assembly includes a drive motor, a drive shaft and a stirring blade, wherein the stirring blade is located inside the reactor, the drive shaft is sealed with the rotation of the reactor, and the drive motor provides power for the rotation of the drive shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By setting up a first condensation unit and a second condensation unit, phenol vapor in the waste gas generated during chemical purification in the reactor during the purification process of phenol tar is recovered. The first condensation unit is used for the regular condensation and recovery of phenol vapor, and the second condensation unit is used for the standby emergency phenol vapor recovery. When it is indirectly judged through the structure in the connector that the scaling in the first condensation unit is serious, the annular shell in the second condensation unit can be lowered, and the scaling in the first condensation tube is cleaned with the cooperation of the nylon brush ring and the elastic filter screen, and cooling water will be subsequently introduced into the cooling inner tube in the annular shell, so that the inner wall of the annular shell replaces the inner wall of the first condensation tube for condensation and recovery of phenol vapor. After the cleaning of the inner wall of the first condensation tube is completed, the equipment will return to the regular phenol vapor condensation and recovery posture. When the annular shell descends and cooperates with the elastic filter screen, the phenol liquid remaining in the scaling can also be squeezed out to improve the recovery rate of phenol vapor in the tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the reactor of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the condensation reflux component of the present invention;

[0022] Figure 4 The present invention Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 5 The present invention Figure 3 Schematic diagram of the enlarged structure at B in the middle;

[0024] Figure 6 The present invention Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0025] Figure 7 This is a schematic diagram of the internal structure of the annular shell of the present invention after expansion;

[0026] Figure 8 It is a schematic structural diagram of the connector of the present invention.

[0027] Figure numerals: 1. Reactor; 2. Auxiliary platform; 3. Stirring and mixing assembly; 4. Condensation reflux assembly; 5. Tail gas pipe; 6. First condensing unit; 7. Second condensing unit; 8. Feed port; 601. First condensing tube; 602. Elastic filter screen; 603. Slag discharge port; 604. Collecting ring; 605. Anti-outflow ring; 606. Convex ring; 607. Cooling tube; 608. Connector; 609. Elastic ball; 610. Limit rod; 611. Limit hole; 701. Second condensing tube; 702. Annular limiting groove; 703. Annular shell; 704. Nylon brush ring; 705. Cooling inner tube; 706. Piston ring; 707. Water inlet; 708. Electric pressure valve; 709. Drain; 710. Drain pipe; 711. Water inlet branch pipe; 712. Spring. DETAILED DESCRIPTION

[0028] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0029] Example 1

[0030] The purification of phenol tar often requires pretreatment to remove solid impurities, followed by a vacuum distillation process to separate the low-boiling point components in the phenol tar, followed by a chemical purification process to separate the neutral oil impurities, followed by adsorption and decolorization to adsorb colored impurities, and finally crystallization purification to obtain high-purity phenol, thereby completing the efficient recovery of phenol in phenol tar.

[0031] During the chemical purification process, it is usually necessary to use a reactor 1 for alkaline washing and acidification chemical treatment. The material of the reactor 1 is selected from enamel or stainless steel. In this process, phenol vapor and acidic waste gas are generated. In industrial treatment, the waste gas is usually input into a condensation reflux tank to recover the phenol vapor, and then the recovered phenol vapor is sent back to the reactor 1 for treatment. The process is complicated. When a conventional condensation reflux device is equipped on the upper end of the reactor 1, scale will form inside the equipment, and regular disassembly and cleaning are required, which affects the continuous purification of phenol tar. In addition, the condensation elbow of the conventional condensation reflux device is in direct contact with the waste gas. When scale is generated on the surface of the elbow, it is difficult to clean.

[0032] For this reason, Figures 1 to 8 As shown, the present invention provides a phenol tar graded purification device, including a reactor 1 and an auxiliary platform 2. A stirring and mixing component 3 is provided on the top of the reactor 1. A condensation reflux component 4 is provided on the side end of the stirring and mixing component 3 on the top of the reactor 1. There are multiple condensation reflux components 4, and the tops of the multiple condensation reflux components 4 are connected to the tail gas pipe 5. The auxiliary platform 2 can, on the one hand, assist in fixing the reactor 1, and on the other hand, provide operators with convenient maintenance of the components of the reactor 1 or use the observation window of the reactor 1 to understand the situation inside the reactor 1. The stirring and mixing component 3 assists in the chemical purification in the reactor 1, so that the chemical purification is fully carried out. The gas generated in the chemical purification stage in the reactor 1 passes upward through the condensation reflux component 4 and enters the tail gas pipe 5. With the assistance of the condensation reflux component 4, the phenol vapor in the gas is condensed and recovered. The condensed and recovered phenol directly falls back into the reactor 1 for recovery, reducing the content of phenol vapor in the tail gas and reducing the amount of phenol vapor to be subsequently condensed and recovered. In addition, there are multiple condensation reflux components 4, which increases the recovery rate of phenol vapor.

[0033] like Figure 2 As shown, the top of the reactor 1 is also provided with multiple feed ports 8, and the lower end of the reactor 1 is provided with a discharge port. The stirring and mixing component 3 includes a drive motor, a drive shaft and a stirring blade, wherein the stirring blade is located inside the reactor 1, and the drive shaft and the reactor 1 rotate in a sealed manner. The drive motor provides power for the rotation of the drive shaft. Different feed ports 8 correspond to different material additions, so that different materials will not affect each other's denaturation due to residues in the pipeline when added. After the chemical purification in the reactor 1 is completed, it is discharged through the discharge port at the lower end of the reactor 1 and transported to the next process through the pipeline. The drive motor provides power to rotate the drive shaft. The rotation of the drive shaft will drive the rotation of the stirring blade in the reactor 1. The rotation of the stirring blade can ensure the full implementation of the chemical purification in the reactor 1, thereby improving the chemical purification effect in the reactor 1.

[0034] like Figure 3As shown, the condensation reflux component 4 includes a first condensation unit 6 and a second condensation unit 7. The second condensation unit 7 is a spare emergency condensation unit. The waste gas generated during the purification of phenol tar is condensed and recovered with the assistance of the condensation reflux component 4. The first condensation unit 6 is used under normal conditions. When there is a fault or severe scaling in the first condensation unit 6, the second condensation unit 7 will be started, so that the second condensation unit 7 can perform emergency condensation and reflux of phenol vapor.

[0035] like Figure 3 and Figure 6 As shown, the first condensing unit 6 includes a first condenser 601, the lower end of the first condenser 601 is connected to the upper end of the reactor 1, and a cooling pipe 607 is spirally arranged on the outside of the first condenser 601. The cooling medium is pumped into the cooling pipe 607, so that the cooling medium flows in the cooling pipe 607. When the phenol vapor passes through the first condenser 601, due to the decrease in temperature, the phenol vapor will liquefy and condense on the inner wall of the first condenser 601 and flow downward and return to the reactor 1. The cooling medium is water, and a scale inhibitor is added to the water to reduce scaling in the cooling pipe 607, and the temperature at the first condenser 601 is controlled to be ≤25°C to ensure sufficient liquefaction of the phenol vapor. The spiral winding method of the cooling pipe 607 reduces the processing difficulty, is easy to implement, and avoids impurities in the exhaust gas from scaling on the surface of the cooling pipe 607, which is difficult to clean.

[0036] like Figure 6 As shown, the upper end of the first condensing pipe 601 is connected to the second condensing unit 7, and an elastic filter screen 602 is provided at the lower inner part of the first condensing pipe 601. The cross section of the elastic filter screen 602 is in an eight-shaped shape. The first condensing pipe 601 is provided with a plurality of slag discharge ports 603 at the corresponding positions of the elastic filter screen 602. A collecting ring 604 is provided at the outer side of the first condensing pipe 601 at the corresponding positions of the slag discharge ports 603. The collecting ring 604 is detachable. When the exhaust gas flows upward in the first condensing pipe 601, impurities will be present in the first condensing pipe. The inner wall of the tube 601 is adhered and condensed. When the material in the reactor 1 is added by pumping, the equipment will inevitably vibrate slightly, and the loose scale on the inner wall of the first condenser tube 601 will fall off. In order to prevent the scale from falling into the reactor 1, the elastic filter 602 is used to assist in collecting the fallen scale, and the inclined surface is used to allow the fallen scale to slide into the collection ring 604 through the slag discharge port 603, while the condensed phenol can pass through the elastic filter 602 and enter the reactor 1.

[0037] An anti-outflow ring 605 is provided above the slag discharge port 603 on the side close to the elastic filter screen 602, and a convex ring 606 is provided at the lower end of the slag discharge port 603 on the side close to the elastic filter screen 602. When the phenol liquid condensed on the inner wall of the first condenser 601 flows downward, the anti-outflow ring 605 is used to assist in preventing the phenol liquid from entering the collecting ring 604 through the slag discharge port 603. When the phenol liquid falling on the elastic filter screen 602 does not have time to pass through the elastic filter screen 602, the convex ring 606 is used to reduce the amount of phenol liquid entering the slag discharge port 603, thereby increasing the recovery rate of phenol vapor.

[0038] After the collection ring 604 is installed, the slag discharge port 603 of the first condenser tube 601 is no longer connected to the outside. After the collection ring 604 is installed, the outer end of the slag discharge port 603 of the first condenser tube 601 is in a closed state, preventing the gas in the first condenser tube 601 from leaking out and causing environmental pollution.

[0039] like Figure 3 and Figure 8 As shown, the cooling pipe 607 is divided into two parts, an upper part and an lower part, a connector 608 is provided between the cooling pipes 607 of the upper and lower parts, an elastic ball 609 is provided inside the connector 608, a limiting rod 610 is provided at the side end of the elastic ball 609, a water passage is provided in the connector 608, a limiting hole 611 is provided on the inner wall of the connector 608 at the side end of the water passage, the limiting rod 610 slides in the limiting hole 611, and a liquid that easily expands when heated is provided in the limiting hole 611, an elastic ball placement groove is provided on the inner wall of the connector 608 at the side end of the water passage, the elastic ball 609 is located in the elastic ball placement groove, and the elastic ball 609 is located in the elastic ball placement groove. The elastic ball placement groove is located on the opposite side of the limiting hole 611. When the inner wall of the first condenser 601 is scaled and thickened, the heat diffused outward from the first condenser 601 will decrease. Therefore, the water temperature in the cooling tube 607 will drop. After the temperature drops, the heated and easily expanded liquid in the limiting hole 611 will cool down and reduce in volume, causing the limiting rod 610 to move into the limiting hole 611, and then causing the elastic ball 609 to enter the water channel, reducing the flow of water to the lower part of the cooling tube 607. When the pumping pressure remains unchanged, the pressure in the upper cooling tube 607 increases, allowing the second condensing unit 7 to start.

[0040] like Figures 3 to 5As shown, the second condensation unit 7 includes a second condensation tube 701, the upper end of the second condensation tube 701 is connected to the exhaust pipe 5, and the lower end of the second condensation tube 701 is connected to the first condensation unit 6. The lower end of the second condensation tube 701 is provided with an annular limiting groove 702, and an annular shell 703 is provided in the annular limiting groove 702 for sliding up and down. A nylon brush ring 704 is provided on the side of the lower end of the annular shell 703 close to the outside of the second condensation tube 701, and the annular shell 703 can slide up and down in the annular limiting groove 702. During the sliding process, the nylon brush ring 704 can clean the structure of the inner wall of the first condensation tube 601, and the structure of the inner wall of the annular shell 703 itself can be scraped off through the mouth of the annular limiting groove 702, thereby increasing the heat exchange efficiency.

[0041] The annular shell 703 is provided with a cooling inner tube 705, which is arranged in an S shape in the annular shell 703. The upper end of the annular shell 703 is provided with a piston ring 706, and the piston ring 706 is provided with a water inlet 707. The water inlet 707 is provided with an electric control pressure valve 708. One end of the cooling inner tube 705 is connected to the water inlet 707, and the other end of the cooling inner tube 705 passes through the piston ring 706. The second condenser 701 is provided with a drain 709 on the upper part of the annular limit groove 702. The drain 709 is provided with a drain 709. 09 is L-shaped, the cooling inner tube 705 passes through one end of the piston ring 706 and slides in the drain channel 709, the second condenser 701 is provided with a drain pipe 710 on the outside of the drain channel 709, the second condenser 701 is provided with a water inlet branch pipe 711, the lower end of the water inlet branch pipe 711 is connected to the cooling pipe 607, the upper end of the water inlet branch pipe 711 is connected to the upper part of the annular limiting groove 702, a spring 712 is provided between the lower end of the piston ring 706 and the mouth of the annular limiting groove 702, and the lower end of the piston ring 706 is provided with a spring 712. A limit ring is provided, and a spring 712 is located between the limit ring and the piston ring 706. When the pressure on the upper part of the cooling tube 607 increases, the water flow will flow along the water inlet branch 711 into the upper end of the annular limit groove 702, thereby causing the piston ring 706 to overcome the action of the spring 712 and move downward, causing the annular shell 703 to move downward. During this process, the nylon brush ring 704 cleans the scale on the inner wall of the first condenser tube 601, and when the piston ring 706 descends, the liquid on the upper part of the cooling tube 607 enters the annular limit groove 702. The pressure in the upper part of the cooling tube 607 tends to be stable or rises slowly. When the piston ring 706 drops to the limit, the annular limit groove 702 no longer plays a pressure-dividing effect, and the pressure in the upper part of the cooling tube 607 continues to rise, that is, the pressure in the annular limit groove 702 rises. When the pressure is greater than the electric-controlled pressure valve 708, the electric-controlled pressure valve 708 opens for a set time, and the water in the annular limit groove 702 enters the cooling inner tube 705. At this time, the inner wall of the annular shell 703 will begin to liquefy and condense the phenol vapor.

[0042] During the use of the present invention, when phenol tar is purified, at the beginning of the chemical purification stage in the reactor 1, cooling water is supplied to the cooling pipe 607 in a pumping manner, so that the cooling water flows into the cooling pipe 607 from the upper end and flows out from the lower end.

[0043] When chemical purification is carried out in the reactor 1, waste gas will be generated. The waste gas will flow upward into the condensation reflux component 4 and then be guided by the tail gas pipe 5 to the subsequent process for treatment. When the waste gas passes through the condensation reflux component 4, the flow of cooling water in the cooling pipe 607 will reduce the temperature at the first condenser 601, and the phenol vapor in the waste gas will liquefy on the inner wall of the first condenser 601. As the liquefied phenol accumulates on the inner wall of the first condenser 601, the phenol will slide down along the inner wall of the first condenser 601 and re-enter the reactor 1, thereby completing the recovery and utilization of the phenol vapor, thereby improving the chemical purification effect in the reactor 1.

[0044] When the liquid phenol on the inner wall of the first condenser 601 slides down, the anti-outflow ring 605 is used to prevent the phenol liquid from entering the collection ring 604 through the slag discharge port 603. When the phenol liquid falling on the elastic filter 602 does not have time to pass through the elastic filter 602, the convex ring 606 is used to reduce the amount of phenol liquid entering the slag discharge port 603, thereby increasing the recovery rate of phenol vapor.

[0045] As the chemical purification in the reactor 1 proceeds, impurities in the exhaust gas will inevitably adhere to the inner wall of the first condenser 601. When the material in the reactor 1 is added by pumping, the equipment will inevitably vibrate slightly, and the loose scale on the inner wall of the first condenser 601 will fall off. In order to prevent the scale from falling into the reactor 1, the elastic filter 602 is used to assist in collecting the fallen scale, and the inclined surface is used to allow the fallen scale to slide into the collection ring 604 through the slag discharge port 603, and the condensed phenol can pass through the elastic filter 602 and enter the reactor 1.

[0046] As the scaling layer continues to thicken, the heat exchange efficiency between the first condenser 601 and the cooling tube 607 will decrease. Therefore, the water temperature of the cooling water in the cooling tube 607 will decrease. After the water temperature in the cooling tube 607 drops, the heated and easily expanded liquid in the limiting hole 611 will cool down and reduce in volume, causing the limiting rod 610 to move into the limiting hole 611, and then causing the elastic ball 609 to enter the water channel, reducing the flow of water from the cooling tube 607 to the lower part. When the pumping pressure remains unchanged, the pressure in the upper cooling tube 607 increases.

[0047] After the pressure in the upper cooling pipe 607 increases, the water pressure entering the annular limiting groove 702 through the water inlet branch 711 will also increase. As the amount of water entering the annular limiting groove 702 increases, under the action of the water pressure, the piston ring 706 will overcome the action of the spring 712 and move downward, causing the annular shell 703 to move downward. In this process, the nylon brush ring 704 cleans the scale on the inner wall of the first condenser pipe 601, and when the piston ring 706 descends, the liquid on the upper part of the cooling pipe 607 enters the annular limiting groove 7 02, thereby making the pressure on the upper part of the cooling pipe 607 tend to be stable or slowly rise, and when the piston ring 706 drops to the limit, the annular limit groove 702 no longer plays a pressure-dividing effect, and the cleaned scale will fall on the elastic filter 602. With the assistance of the inclined surface of the elastic filter 602, the scale will pass through the slag discharge port 603 and enter the collecting ring 604. When the annular shell 703 drops and contacts the elastic filter 602, the residual phenol liquid in the scale between the two can be squeezed out to improve the recovery rate of phenol vapor.

[0048] When the piston ring 706 drops to its limit, as the water flow continues to enter the annular limit groove 702, the pressure in the annular limit groove 702 will continue to rise. When the pressure is greater than the electric control pressure valve 708, the electric control pressure valve 708 opens for a set time, and the water in the annular limit groove 702 will enter the cooling inner tube 705, thereby reducing the water pressure in the annular limit groove 702. At this time, the inner wall of the annular shell 703 will begin to liquefy and condense phenol vapor. As the water pressure in the annular limit groove 702 decreases, with the assistance of the spring 712, the piston ring 706 moves upward, causing the annular shell 703 to retract into the annular limit groove 702. In this process, the lower port of the annular limit groove 702 will clean the phenol liquid and scale on the inner wall of the annular shell 703.

[0049] As the annular shell 703 rises, the thickness of the first condenser tube 601 returns to its initial thickness, and its heat exchange efficiency increases, causing the water temperature in the cooling tube 607 to rise, thereby causing the elastic ball 609 in the connector 608 to return to its initial state, thereby completing the cleaning of the scale on the inner wall of the first condenser tube 601 and returning to the initial condensation state.

[0050] The main functions achieved by the present invention are: by setting the first condensing unit 6 and the second condensing unit 7, the phenol vapor in the waste gas generated during the chemical purification in the reactor 1 during the purification process of phenol tar is recovered, the first condensing unit 6 is used for the condensation and recovery of the phenol vapor on a regular basis, and the second condensing unit 7 is used for the emergency phenol vapor recovery. When it is indirectly judged through the structure in the connector 608 that the scaling in the first condensing unit 6 is serious, the annular shell 703 in the second condensing unit 7 is lowered, and the nylon brush ring 704 and With the cooperation of the elastic filter 602, the scale in the first condenser tube 601 is cleaned, and cooling water will be subsequently introduced into the cooling inner tube 705 in the annular shell 703, so that the inner wall of the annular shell 703 replaces the inner wall of the first condenser tube 601 to condense and recover phenol vapor. After the inner wall of the first condenser tube 601 is cleaned, the equipment will return to the normal phenol vapor condensation and recovery posture. When the annular shell 703 descends and cooperates with the elastic filter 602, it can also squeeze out the phenol liquid remaining in the scale to improve the recovery rate of phenol vapor in the exhaust gas.

[0051] Finally, it should be noted that the main function of the setting of the convex ring 606 is to reduce the amount of phenol liquid entering the slag discharge port 603. At the same time, scale will exist between the convex ring 606 and the inclined surface of the elastic filter screen 602, which cannot pass through the slag discharge port 603 and enter the collecting ring 604. The amount of residual scale between the convex ring 606 and the inclined surface of the elastic filter screen 602 depends on the height of the protruding part of the convex ring 606. The higher the protruding part of the convex ring 606, the more residual scale it corresponds to. By reasonably setting the protruding height of the convex ring 606, the amount of residual scale between the convex ring 606 and the inclined surface of the elastic filter screen 602 can be controlled. Therefore, the setting of the convex ring 606 has more advantages than disadvantages.

[0052] Example 2

[0053] The present invention also provides a method for processing the condensation reflux component in the first embodiment, comprising the following steps:

[0054] Step 1: Process the slag discharge port 603, the mounting groove of the elastic filter 602, and the snap groove of the collection ring 604 on the first condenser tube 601, install a sealing gasket in the snap groove, and snap-fit the collection ring 604 to the outside of the first condenser tube 601 to ensure that the first condenser tube 601 remains sealed outside the slag discharge port 603. Then, elastically deform the elastic filter 602 and embed it into the mounting groove on the inner wall of the first condenser tube 601. Then, wind the cooling tube 607 around the outside of the first condenser tube 601.

[0055] Step 2: Process the annular limiting groove 702 on the second condenser pipe 701, and process the insertion holes of the drainage channel 709 and the water inlet branch pipe 711. The insertion hole of the water inlet branch pipe 711 can be directly drilled to connect with the upper end of the annular limiting groove 702 at an angle, while the drainage channel 709 is formed into an L-shaped hole by combining vertical and horizontal drilling.

[0056] Step 3: Place the elastic S-shaped cooling inner tube 705 into the U-shaped annular shell 703, and bend the annular shell 703 into a ring shape, then fix the piston ring 706 to the upper end of the annular shell 703 by welding, and install the nylon brush ring 704 on the outside of the annular shell 703 by patch or welding, insert the processed annular shell 703 into the annular limiting groove 702 as a whole, insert the cooling inner tube 705 into the drain channel 709 for positioning and limiting, and finally install the limiting ring at the lower end of the annular limiting groove 702 by welding;

[0057] Step 4: After the first condensing unit 6 and the second condensing unit 7 are processed, the two are connected by welding, wherein the outer diameters of the first condensing tube 601 and the second condensing tube 701 are the same, and the inner diameter of the first condensing tube 601 is larger than the inner diameter of the second condensing tube 701;

[0058] Step 5: Install the assembled condensation reflux assembly 4 at the corresponding position on the upper end of the reactor 1, and install the remaining components in the condensation reflux assembly 4 using the existing pipeline installation method;

[0059] Step 6. When the connector 608 in step 1 is processed, the connector 608 is divided into two parts, left and right. After the two parts are machined, after the internal elastic ball 609 is installed, the left and right parts are connected and sealed by welding, and a liquid that expands when heated is injected by micro-drilling at the limit hole 611, and then sealed.

[0060] The phenol tar graded purification device of the present invention has common mechanical installation, connection or setting methods, and any method that can achieve its beneficial effects can be implemented.

[0061] All technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0062] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A phenol tar fractionation and purification device, comprising a reactor (1) and an auxiliary platform (2), characterized in that: The top of the reactor (1) is provided with a stirring and mixing component (3), and the top of the reactor (1) is provided with a condensation reflux component (4) at the side end of the stirring and mixing component (3), and a plurality of condensation reflux components (4) are provided, and the tops of the plurality of condensation reflux components (4) are connected to the tail gas pipe (5); The condensation reflux component (4) comprises a first condensation unit (6) and a second condensation unit (7), wherein the second condensation unit (7) is a standby emergency condensation unit, and the waste gas generated during the phenol tar purification process is condensed and recovered with the assistance of the condensation reflux component (4); The first condensing unit (6) comprises a first condensing tube (601), the lower end of the first condensing tube (601) is connected to the upper end of the reaction kettle (1), the upper end of the first condensing tube (601) is connected to the second condensing unit (7), and an elastic filter screen (602) is provided at the lower inner portion of the first condensing tube (601), and the cross section of the elastic filter screen (602) is in an eight-shaped shape; A cooling tube (607) is spirally arranged around the outer side of the first condensing tube (601), and the cooling tube (607) is divided into an upper and lower part. A connector (608) is arranged between the upper and lower parts of the cooling tube (607), and an elastic ball (609) is arranged inside the connector (608). A limiting rod (610) is arranged at the side end of the elastic ball (609). A water passage is arranged inside the connector (608), and a limiting hole (611) is arranged on the inner wall of the connector (608) at the side end of the water passage. The limiting rod (610) slides in the limiting hole (611), and a liquid that easily expands when heated is arranged in the limiting hole (611). An elastic ball placement groove is arranged on the inner wall of the connector (608) at the side end of the water passage, and the elastic ball (609) is located in the elastic ball placement groove, and the elastic ball placement groove is located on the opposite side of the limiting hole (611); The second condensing unit (7) includes a second condensing pipe (701), the upper end of the second condensing pipe (701) is connected to the tail gas pipe (5), the lower end of the second condensing pipe (701) is connected to the first condensing unit (6), the lower end of the second condensing pipe (701) is provided with an annular limiting groove (702), an annular shell (703) is provided in the annular limiting groove (702) for sliding up and down, and a nylon brush ring (704) is provided on the side of the lower end of the annular shell (703) close to the outside of the second condensing pipe (701); A cooling inner tube (705) is provided in the annular shell (703), a piston ring (706) is provided at the upper end of the annular shell (703), a water inlet (707) is provided on the piston ring (706), an electrically controlled pressure valve (708) is provided in the water inlet (707), one end of the cooling inner tube (705) is communicated with the water inlet (707), the other end of the cooling inner tube (705) passes through the piston ring (706), and a spring (712) is provided between the lower end of the piston ring (706) and the mouth of the annular limiting groove (702); The second condenser (701) is provided with a drainage channel (709) on the upper part of the annular limiting groove (702), and the drainage channel (709) is L-shaped. The cooling inner tube (705) passes through one end of the piston ring (706) and slides in the drainage channel (709). The second condenser (701) is provided with a drainage pipe (710) on the outside of the drainage channel (709).

2. The phenol tar classification and purification device according to claim 1, wherein The first condenser (601) is provided with a plurality of slag discharge ports (603) at positions corresponding to the elastic filter screen (602), and a collecting ring (604) is provided on the outside of the first condenser (601) at positions corresponding to the slag discharge ports (603), and the collecting ring (604) is detachable.

3. The phenol tar classification and purification device as claimed in claim 2, wherein: An anti-outflow ring (605) is provided above the slag discharge port (603) on a side close to the elastic filter screen (602), and a convex ring (606) is provided at the lower end of the slag discharge port (603) on a side close to the elastic filter screen (602); After the collecting ring (604) is installed, the slag discharge port (603) of the first condenser pipe (601) is no longer connected to the outside.

4. The phenol tar classification and purification device according to claim 1, wherein The cooling inner tubes (705) are arranged in an S shape within the annular shell (703).

5. The phenol tar classification and purification device according to claim 1, wherein A water inlet branch pipe (711) is provided on the second condenser pipe (701), the lower end of the water inlet branch pipe (711) is connected to the cooling pipe (607), and the upper end of the water inlet branch pipe (711) is connected to the upper part of the annular limiting groove (702).

6. The phenol tar classification and purification device according to claim 1, wherein: The top of the reactor (1) is also provided with a plurality of feed ports (8), and the lower end of the reactor (1) is provided with a discharge port. The stirring and mixing assembly (3) includes a drive motor, a drive shaft and a stirring blade, wherein the stirring blade is located inside the reactor (1), the drive shaft and the reactor (1) are rotatably sealed, and the drive motor provides power for the rotation of the drive shaft.

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