An adsorption device for acidified aqueous phase in the synthesis of cresols

Abstract

This invention discloses an acidified aqueous phase adsorption device for cresol synthesis, comprising an absorption tower, an aqueous phase conveying assembly, and a liquid flow guiding device. The absorption tower contains multiple adsorption chambers, each with a liquid flow guiding device containing a resin column. Regenerated liquid filling chambers and regenerated waste liquid discharge chambers are symmetrically distributed outside the adsorption chambers. The outer wall of each adsorption chamber has multiple sets of first liquid passage holes. A liner plate is provided at the bottom of each adsorption chamber, with multiple sets of second liquid passage holes. The aqueous phase conveying assembly includes several feed pipe groups and discharge pipe groups corresponding to the adsorption chambers. The feed pipe groups are located above the resin column in each adsorption chamber, and the discharge pipe groups are located below each liner plate. The liquid flow guiding device includes two semi-cylindrical plates and two semi-circular bottom plates. Both semi-cylindrical plates have multiple sets of third liquid passage holes, and both semi-circular bottom plates have multiple sets of fourth liquid passage holes. The sum of the unfolded angles of the two semi-circular bottom plates is less than 360°.

Description

Technical Field

[0001] This invention relates to the field of cresol synthesis technology, and more particularly to an acidified aqueous phase adsorption device for use in the cresol synthesis process. Background Technology

[0002] In the cresol synthesis process, o-chlorotoluene and excess alkaline solution react in a high-pressure hydrolysis device. After the hydrolysate is allowed to stand and separate into layers, the lower clear liquid is neutralized with hydrochloric acid. After the neutralized liquid is allowed to stand and separate into layers, the bottom acidified aqueous phase needs to be adsorbed.

[0003] In the existing technology, the acidified aqueous phase in the synthesis of cresol is mainly adsorbed using a dedicated high-efficiency resin column. After the resin column is saturated, it needs to be switched to the regeneration state. The alkali solution is injected into the resin column for regeneration using a regeneration alkali solution tank. After the alkali solution is qualified for regeneration, it is rinsed with the qualified adsorption solution stored in the qualified solution storage tank until the effluent is neutral. At this time, the regeneration of the resin column is completed.

[0004] During resin column regeneration, the adsorption of the acidified aqueous phase will be terminated. Due to the instability of the concentration of the acidified aqueous phase generated during cresol synthesis, the adsorption saturation time of the resin column will vary with the concentration of the acidified aqueous phase, provided that the discharge flow rate of the acidified aqueous phase remains constant. However, during resin column regeneration, the feeding rates of the regeneration alkali tank and the qualified liquid storage tank are stable, meaning that the regeneration time of the resin column is fixed.

[0005] In the existing technology, the acidified aqueous phase continuously produced during cresol synthesis is either stored in a temporary storage tank or adsorbed by another resin column during regeneration. After adsorption saturation, the adsorption and regeneration process is exchanged with the regenerated resin column. Using a temporary storage tank will occupy additional industrial production space and increase the construction cost of the production plant.

[0006] In existing technologies, the resin columns used for acidified aqueous phase adsorption are mostly single-section, and the length of the resin column used for adsorption cannot be adjusted. Switching can only be done after the entire resin column is saturated. If the concentration of the acidified aqueous phase is low, the time for the entire resin column to become saturated will be much shorter than the regeneration time. After one resin column is regenerated, it can only remain idle until another resin column becomes saturated and can be switched. The waiting time of the resin column is wasted. Summary of the Invention

[0007] To address the problems mentioned in the background section, the present invention provides an acidified aqueous phase adsorption device for the synthesis of cresol.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An acidified aqueous phase adsorption device for cresol synthesis includes an absorption main tower, an aqueous phase conveying assembly, and a liquid flow guiding device. The absorption main tower has multiple adsorption chambers vertically distributed from top to bottom. Each adsorption chamber is equipped with a liquid flow guiding device, which is equipped with a resin column. The adsorption chamber is cylindrical. Regenerated liquid filling chamber and regenerated waste liquid discharge chamber are symmetrically distributed on the outside of the adsorption chamber. The outer wall of the adsorption chamber has multiple sets of first liquid passage holes. A liner plate is provided at the bottom of the adsorption chamber, and the liner plate has multiple sets of second liquid passage holes.

[0010] The aqueous phase transport assembly includes several feed pipe groups and discharge pipe groups corresponding to the adsorption chambers. The feed pipe groups are located above the resin columns of each adsorption chamber, and the discharge pipe groups are located below each liner plate.

[0011] The fluid flow guiding device includes two semi-cylindrical plates and two semi-circular bottom plates. Both semi-cylindrical plates have multiple sets of third fluid passage holes, and both semi-circular bottom plates have multiple sets of fourth fluid passage holes. The sum of the unfolding angles of the two semi-circular bottom plates is less than 360 degrees.

[0012] The two adjacent adsorption chambers are separated by a dividing plate, which is composed of two closely spaced staggered plates. The horizontal relative position of the two staggered plates can be changed, and both staggered plates are provided with a liquid discharge groove.

[0013] Preferably, the first liquid passage group consists of multiple vertically arranged perforations at equal intervals, and the first liquid passage group is distributed on the outer wall of the adsorption chamber at a fixed interval. The third liquid passage group consists of multiple vertically arranged perforations at equal intervals, and the third liquid passage group is distributed on the semi-cylindrical plate at a fixed interval. The distance between two adjacent groups of third liquid passage groups is not less than the perforation diameter of the first liquid passage group, and the distance between two adjacent groups of first liquid passage groups is not less than the perforation diameter of the third liquid passage group. The semi-cylindrical plate can be adjusted to the corresponding positions of the first liquid passage group and the third liquid passage group.

[0014] Preferably, the second liquid passage group consists of multiple perforations arranged radially from the center of the support plate to the edge, and the second liquid passage group is symmetrically arranged on the circumference of the support plate. The fourth liquid passage group consists of multiple perforations arranged radially from the center of the semi-circular bottom plate, and the fourth liquid passage group is symmetrically arranged on the circumference of the semi-circular bottom plate. The semi-circular bottom plate can be adjusted to the corresponding positions of the second liquid passage group and the fourth liquid passage group.

[0015] Preferably, the regenerated liquid filling chamber is connected to the regenerated feed pipe, and the regenerated waste liquid discharge chamber is connected to the discharge pipe.

[0016] Preferably, the regenerated feed pipe is equipped with a pump capable of pumping regenerated liquid into the regenerated liquid filling chamber.

[0017] Preferably, the absorption tower is also equipped with a switching component, which is configured in the absorption tower to independently adjust the rotational position of each semi-cylindrical plate and the two semi-cylindrical bottom plates.

[0018] Preferably, the switching device is installed in the absorption main tower and includes a drive head, an inner rotating shaft, a fixed column, an outer sleeve and an inner sleeve. The fixed column passes through the center of each semi-circular bottom plate, the outer sleeve is installed at the position where the fixed column passes through each semi-circular bottom plate, the inner sleeve is installed inside the outer sleeve, the inner rotating shaft is located inside the fixed column and is surrounded by each inner sleeve, and the drive head is installed in the absorption main tower.

[0019] An outer sleeve is connected to one of two semi-circular bottom plates of a fluid guide device. The outer sleeve has an outlet, and the inner sleeve has a linkage lug on its outer wall. The linkage lug passes through the outlet and connects to the other semi-circular bottom plate.

[0020] Both the outer sleeve and the inner sleeve have driven members on their inner walls, and the outer wall of the inner rotating shaft has several sets of driving members that can mesh with the driven members.

[0021] Preferably, the outer sleeve is installed at the position where the fixed column passes through each semi-circular bottom plate, and the drive head can drive the inner rotating shaft to rotate axially and move up and down.

[0022] Preferably, the outer sleeve is axially rotatable relative to the fixed column, and the inner sleeve is axially rotatable relative to the outer sleeve.

[0023] Preferably, the characteristic is that the relative positions of the driven members installed in each set of outer sleeve and inner sleeve are different, so that when the drive head drives the inner rotating shaft to move to a certain height, only one driving member can engage with the driven member.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This invention abandons the design of one tower and one resin column in the prior art. Instead, it divides the space inside the main absorption tower into multiple smaller adsorption chambers and installs a resin column in each adsorption chamber. Based on the calculation and prediction of the detection and calculation system, the number of resin columns in the adsorption state and the regeneration state are reasonably allocated. The device can be quickly adjusted according to different discharge conditions of different acidic aqueous phases, with excellent applicability and can maximize the adsorption efficiency of acidic aqueous phase.

[0026] 2. The present invention provides a switchable on / off dividing plate between two adjacent adsorption chambers, and the semi-cylindrical plate and the two semi-circular bottom plates can also be adjusted and switched individually. Under the condition that the adsorption time of acidic aqueous phase is long, the pump pumping the regenerated liquid into the regenerated liquid filling chamber can be turned on as little as possible without affecting the regeneration of the resin column, thereby reducing the energy consumption of the regeneration operation and improving economic efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the external structure of an acidified aqueous phase adsorption device for the synthesis of cresol as described in this invention.

[0029] Figure 2 This is an external and internal cross-sectional view of an acidified aqueous phase adsorption device used in the cresol synthesis process according to the present invention.

[0030] Figure 3 This is a structural schematic diagram of the absorption tower section of the present invention taken from one direction;

[0031] Figure 4 This is a schematic diagram of the absorption tower section of the present invention taken from another direction;

[0032] Figure 5 This is a schematic diagram of the liquid flow guiding device described in this invention;

[0033] Figure 6 for Figure 2 Enlarged view of point A in the middle;

[0034] Figure 7 This is a partial structural diagram of the switching device described in this invention;

[0035] Figure 8 This is a partial side sectional view of the switching device described in this invention.

[0036] In the diagram: 1. Absorption main tower; 101. Adsorption chamber; 102. Regenerated liquid filling chamber; 103. Regenerated waste liquid discharge chamber; 104. Feed chamber; 105. Discharge chamber; 11. Annular wall; 1101. First liquid passage group; 12. Liner plate; 1201. Second liquid passage group; 13. Dividing plate; 1301. Discharge tank; 2. Aqueous phase conveying assembly; 21. Feed pipe group; 22. Discharge pipe group; 23. Electrically controlled valve; 3. 1. Liquid flow guiding device; 31. Semi-cylindrical plate; 3101. Third liquid passage hole group; 32. Semi-circular bottom plate; 3201. Fourth liquid passage hole group; 4. Switching device; 401. Probe outlet; 41. Drive head; 42. Inner rotating shaft; 43. Fixed column; 44. Outer sleeve; 45. Inner sleeve; 46. Linkage lug; 47. Driven component; 48. Driven component; 5. Resin column; 6. Regeneration feed pipe; 7. Drain pipe; 8. Pump. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Reference Figure 1-8 An acidified aqueous phase adsorption device for cresol synthesis process includes an absorption tower 1, an aqueous phase conveying assembly 2, a liquid flow guiding device 3, and a switching device 4. The absorption tower 1 has multiple adsorption chambers 101 vertically distributed from top to bottom. Each adsorption chamber 101 is provided with a liquid flow guiding device 3, and a resin column 5 is provided inside the liquid flow guiding device 3. The aqueous phase conveying assembly 2 injects acidified aqueous phase into each adsorption chamber 101, which is then adsorbed by the resin column 5 and finally discharged.

[0039] The adsorption chamber 101 is cylindrical, and its periphery has an annular wall 11. Symmetrically distributed on the outer side of the adsorption chamber 101 are a regenerated liquid filling chamber 102 and a regenerated waste liquid discharge chamber 103. The annular wall 11 has multiple sets of first liquid passage holes 1101, each consisting of multiple vertically arranged equidistant perforations. These first liquid passage holes 1101 are distributed at fixed intervals on the annular wall 11 to allow the adsorption chamber 101 to communicate with the regenerated liquid filling chamber 102 and the regenerated waste liquid discharge chamber 103. The regenerated liquid filling chamber 102 is connected to the regeneration feed pipe 6, and the regenerated waste liquid discharge chamber 103 is connected to the discharge pipe 7. The regenerated alkali solution flows into the regenerated liquid filling chamber 102 through the regeneration feed pipe 6, enters the adsorption chamber 101 through the first liquid passage holes 1101 to regenerate and rinse the saturated resin column 5, and then enters the regenerated waste liquid discharge chamber 103, finally being discharged from the discharge pipe 7.

[0040] Above the adsorption chamber 101 is a feed chamber 104 that is not connected to the regenerated liquid filling chamber 102 or the regenerated waste liquid discharge chamber 103. Below the adsorption chamber 101 is a support plate 12. The support plate 12 has multiple sets of second liquid passage holes 1201, each set consisting of multiple perforations arranged radially from the center to the edge of the support plate 12. The second liquid passage holes 1201 are symmetrically arranged circumferentially on the support plate 12. Below the support plate 12 is a discharge chamber 105 that is not connected to the regenerated liquid filling chamber 102 or the regenerated waste liquid discharge chamber 103.

[0041] The aqueous phase conveying assembly 2 includes an inlet pipe assembly 21, an outlet pipe assembly 22, and an electrically controlled valve 23. The inlet pipe assembly 21 connects to each adsorption chamber 101, and the connection between the inlet pipe assembly 21 and the adsorption chamber 101 is located in the inlet chamber 104. The outlet pipe assembly 22 also connects to each adsorption chamber 101, and the connection between the outlet pipe assembly 22 and the adsorption chamber 101 is located in the outlet chamber 105. The liquid flow guiding device 3 carrying the resin column 5 can close the first liquid passage hole assembly 1101, and the outlet chamber 105 above and the inlet chamber 104 below are isolated by a dividing plate 13. The acidified aqueous phase enters the inlet chamber 104 through the inlet pipe assembly 21 and falls into the resin column 5. After being adsorbed by the resin column 5, it falls into the outlet chamber 105 and is finally discharged through the outlet pipe assembly 22. The electrically controlled valve 23 is installed at the connection section between the feed pipe assembly 21 and each feed chamber 104, and at the connection section between the discharge pipe assembly 22 and each discharge chamber 105, so that the acidified aqueous phase can flow accurately into the appropriate adsorption chamber 101.

[0042] The liquid flow guiding device 3 includes two semi-cylindrical plates 31 and two semi-circular bottom plates 32. The bottom edge of the semi-cylindrical plate 31 is tightly installed on the arc edge of the semi-circular bottom plate 32. Both semi-cylindrical plates 31 have multiple sets of third liquid passage hole groups 3101. The third liquid passage hole group 3101 is composed of multiple vertically arranged perforations at equal intervals. The third liquid passage hole groups 3101 are distributed on the semi-cylindrical plates 31 at fixed intervals.

[0043] The distance between two adjacent sets of third liquid passage holes 3101 is not less than the perforation diameter of the first liquid passage hole set 1101, and the distance between two adjacent sets of first liquid passage hole sets 1101 is not less than the perforation diameter of the third liquid passage hole set 3101. When the liquid flow guiding device 3 is installed in the adsorption chamber 101, the semi-cylindrical plate 31 is in close contact with the inner wall of the annular surrounding wall 11, and the semi-cylindrical plate 31 can rotate within the adsorption chamber 101. When the semi-cylindrical plate 31 rotates to the position corresponding to the perforation of the first liquid passage hole set 1101 and the third liquid passage hole set 3101... When in place, the regenerated liquid filling chamber 102 and the regenerated waste liquid discharge chamber 103 can be connected to the internal space of the liquid flow guiding device 3. The semi-cylindrical plate 31 can also be rotated to a position where the perforations of the first liquid passage group 1101 and the third liquid passage group 3101 are staggered. At this time, the perforations of the first liquid passage group 1101 are closed by the semi-cylindrical plate 31, and the perforations of the third liquid passage group 3101 are closed by the annular wall 11. The regenerated liquid filling chamber 102 and the regenerated waste liquid discharge chamber 103 will be isolated from the internal space of the liquid flow guiding device 3.

[0044] The semi-circular bottom plate 32 has multiple sets of fourth liquid passage hole groups 3201. Each fourth liquid passage hole group 3201 consists of multiple perforations arranged radially from the center to the edge of the semi-circular bottom plate 32. The fourth liquid passage hole groups 3201 are symmetrically arranged on the circumference of the semi-circular bottom plate 32. When the semi-cylindrical plate 31 and the semi-circular bottom plate 32 are set in the adsorption chamber 101, they are in close contact with the annular wall 11 and the liner plate 12, respectively. When the semi-cylindrical plate 31 rotates, the semi-circular bottom plate 32 rotates axially together with the semi-cylindrical plate 31. When the semi-circular bottom plate 32 rotates to the point where the fourth liquid passage hole group 3201 corresponds to the second liquid passage hole group 1201, the discharge chamber 105 is connected to the internal space of the liquid flow guiding device 3. When the semi-circular bottom plate 32 rotates to the point where the fourth liquid passage hole group 3201 intersects with the second liquid passage hole group 1201, the discharge chamber 105 is isolated from the internal space of the liquid flow guiding device 3.

[0045] It is worth mentioning that when the third liquid passage group 3101 is set at a position corresponding to the first liquid passage group 1101, the fourth liquid passage group 3201 is staggered with the second liquid passage group 1201, and when the third liquid passage group 3101 is set at a position staggered with the first liquid passage group 1101, the fourth liquid passage group 3201 is corresponding to the second liquid passage group 1201. During adsorption, the liquid flow guiding device 3 is adjusted so that the fourth liquid passage group 3201 corresponds to the second liquid passage group 1201. The acidified aqueous phase flows into the resin column 5 in the liquid flow guiding device 3. After being adsorbed, it can only pass through the fourth liquid passage group 3201 and the second liquid passage group 1201 into the discharge chamber 105 and be discharged by the discharge pipe group 22. During regeneration, the liquid flow guiding device 3 is adjusted so that the third liquid passage group 3101 corresponds to the first liquid passage group 1101. At this time, the regenerated alkali solution and adsorption qualified solution flowing into the regeneration liquid filling chamber 102 through the regeneration feed pipe 6 will pass through the third liquid passage group 3101 and the first liquid passage group 1101 to regenerate the resin column 5, and finally flow into the regeneration waste liquid discharge chamber 103 and be discharged by the discharge pipe 7.

[0046] By switching the state of the liquid flow guiding device 3, the resin column 5 can be made to operate in adsorption and regeneration without affecting each other. The state when the semi-circular bottom plate 32 is adjusted so that the fourth liquid passage group 3201 and the second liquid passage group 1201 are intersected is defined as the adsorption state; the state when the fourth liquid passage group 3201 and the second liquid passage group 1201 are corresponding is defined as the regeneration state.

[0047] The sum of the unfolded angles of the two semicircular base plates 32 is less than 360 degrees, meaning that the two semicircular base plates 32 cannot be pieced together to form a complete circle, but will leave a certain angle. This angle allows the other semicircular base plate 32 to switch independently between adsorption and regeneration states while keeping one semicircular base plate 32 stationary.

[0048] When the acidified aqueous phase adsorption device is set up, the regeneration time of the resin column 5 in each adsorption chamber 101 is a fixed X minutes. During the cresol synthesis operation, an acidified aqueous phase of a fixed concentration is produced at a fixed rate. When the produced acidified aqueous phase is sent to the phase adsorption device, the pre-detection and calculation system will calculate to ensure that the acidified aqueous phase is sent to the adsorption device for adsorption in the most suitable and efficient way.

[0049] If the concentration of the acidified aqueous phase is high, the detection and calculation system will open A electrically controlled valves 23 each time. At any given time, A resin columns 5 in adsorption chambers 101 of the acidified aqueous phase adsorption device will perform adsorption operations, while the remaining B chambers will be idle or in regeneration operations. The resin columns 5 performing adsorption operations will quickly become saturated after Y minutes. The detection and calculation system can estimate the value of Y based on the production rate and concentration of the acidified aqueous phase according to a pre-programmed procedure. Because the concentration and flow rate of the acidified aqueous phase processed by the resin column 5 in a single adsorption chamber 101 are high, the value of X will be M times that of Y. The detection and calculation system can calculate the value of M and make the value of B also M times that of A. The detection and calculation system calculates the value of M based on the data of acidified aqueous phase produced by cresol synthesis and rationally allocates the adsorption chambers 101 in adsorption and regeneration states according to the value of M, so that the acidified aqueous phase adsorption device can adsorb the acidified aqueous phase with the highest efficiency.

[0050] When the concentration of the acidified aqueous phase is low, the detection and calculation system will perform calculations based on the concentration and flow rate of the acidified aqueous phase. If the calculation shows that the time C for the resin column 5 of one adsorption chamber 101 to be saturated is less than X, the detection and calculation system will first open the electronic control valves 23 of half of the adsorption chambers 101 for adsorption. After the resin column 5 in the adsorption chamber 101 that has performed adsorption is saturated, the electronic control valves 23 of the other half of the adsorption chambers 101 will be opened for adsorption, and the resin column 5 in the adsorption chambers 101 with the electronic control valves 23 previously opened will be regenerated. Since the regeneration of the resin column 5 is faster than the adsorption saturation time of the resin column 5, the resin column 5 in the half of the adsorption chambers 101 with the electronic control valves 23 previously opened will be regenerated before the subsequent resin column 5 is saturated. At this time, the electronic control valves 23 in all adsorption chambers 101 will be opened until a resin column 5 is saturated. Then, the electronic control valves 23 corresponding to these saturated resin columns 5 will be closed and regeneration will be performed. This cycle is repeated so that the acidified aqueous phase adsorption device can adsorb the acidified aqueous phase with the highest efficiency.

[0051] If the detection and calculation system calculates based on the concentration and flow rate of the acidified aqueous phase that the resin column 5 is injected into only one adsorption chamber 101 at a time, and the adsorption saturation time D of the resin column 5 is greater than X, then the detection and calculation system will initially keep only the electronic control valve 23 of one adsorption chamber 101 closed while opening the electronic control valves 23 of all other adsorption chambers 101. After the resin column 5 is saturated, the electronic control valves 23 of the previously closed adsorption chambers 101 will be opened, and the remaining adsorption chambers 101 will be switched to the regeneration state, so that the acidified aqueous phase adsorption device can adsorb the acidified aqueous phase with the highest efficiency.

[0052] The dividing plate 13 is composed of two closely spaced, staggered plates. The horizontal relative position of the two staggered plates can be changed. Both staggered plates are provided with a liquid discharge groove 1301. Multiple liquid discharge grooves 1301 are arranged in parallel, and the width of each liquid discharge groove 1301 is no greater than the distance between two adjacent liquid discharge grooves 1301. When the two staggered plates move to the corresponding positions of the liquid discharge grooves 1301, the liquid in the upper discharge chamber 105 can pass through the liquid discharge grooves 1301 and enter the lower feed chamber 104. The staggered plates can move to close each other's liquid discharge grooves 1301, thereby isolating the upper discharge chamber 105 from the lower feed chamber 104.

[0053] When several resin columns 5 that have reached adsorption saturation are regenerated, several adjacent resin columns 5 are grouped together. During the regeneration operation, only the semi-cylindrical plate 31 and semi-circular bottom plate 32 on the side of the uppermost resin column 5 closest to the regeneration liquid filling chamber 102 are switched to the regeneration state, and only the liquid flow guiding device 3 corresponding to the lowermost resin column 5 is switched to the regeneration state. The liquid flow guiding devices 3 corresponding to the other resin columns 5 remain in the adsorption state. During the regeneration operation, multiple resin columns 5 are regenerated in series, and the regeneration time will be Q times that of a single resin column 5 regenerated independently (Q is the number of resin columns 5 in series).

[0054] When the detection and calculation system calculates that the adsorption saturation time D of resin column 5 is greater than X when only one adsorption chamber 101 is injected with the acidified aqueous phase, the system can regenerate multiple resin columns 5 in series. The regeneration time of the resin columns 5 in series can be close to the adsorption saturation time of a single resin column 5, thus allowing regeneration to be performed without affecting the adsorption of the resin column 5. This regeneration method only requires one regeneration feed pipe 6 connected to the regenerated liquid filling chamber 102, and can minimize the operation of the pump 8 pumping the regenerated liquid to the regenerated liquid filling chamber 102 under conditions where the adsorption time of the acidic aqueous phase is long, without affecting the regeneration of the resin column 5, thereby reducing the energy consumption of the regeneration operation.

[0055] The absorption tower 1 is also equipped with a switching assembly 4, which includes a drive head 41, an inner rotating shaft 42, a fixed column 43, an outer sleeve 44, and an inner sleeve 45. The fixed column 43 is vertically fixed inside the absorption tower 1 and penetrates the center of each semi-circular bottom plate 32. The outer sleeve 44 is installed at the position where the fixed column 43 penetrates each semi-circular bottom plate 32. The inner sleeve 45 is installed inside the outer sleeve 44. The inner rotating shaft 42 is configured with...

[0056] Inside the fixed column 43 and surrounded by each inner sleeve 45, the drive head 41 is installed on the absorption main tower 1, and the drive head 41 can drive the inner rotating shaft 42 to rotate axially and move up and down.

[0057] The outer sleeve 44 is axially rotatable relative to the fixed column 43, and the inner sleeve 45 is axially rotatable relative to the outer sleeve 44. The outer wall of the outer sleeve 44 is connected to one of the two semi-circular bottom plates 32 of the liquid flow guiding device 3. The outer wall of the outer sleeve 44 is provided with an outlet 401, and the outer wall of the inner sleeve 45 is provided with a linkage lug 46. The linkage lug 46 passes through the outlet 401 and connects to the other semi-circular bottom plate 32. In this way, the switching component 4 can adjust the position of the semi-circular bottom plate 32 near the regenerated liquid filling chamber 102 and the regenerated waste liquid discharge chamber 103 by rotating the outer sleeve 44 and the inner sleeve 45 corresponding to each liquid flow guiding device 3, thereby independently switching between the adsorption state and the regeneration state.

[0058] Each outer sleeve 44 and inner sleeve 45 corresponding to a fluid flow guide device 3 is provided with a driven member 47 on its inner wall. The outer wall of the inner rotating shaft 42 is provided with several sets of driving members 48 that can mesh with the driven members 47. When the driving members 48 mesh with the driven members 47, the inner rotating shaft 42 can drive the corresponding outer sleeve 44 or inner sleeve 45 to rotate. The relative positions of the driven members 47 installed in each set of outer sleeves 44 and inner sleeves 45 are different, so that when the driving head 41 drives the inner rotating shaft 42 to a certain height, only one driving member 48 can mesh with the driven member 47.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0062] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adsorption device for acidified aqueous phase in a cresol synthesis process, comprising an absorption tower (1), an aqueous phase conveying assembly (2), and a liquid flow guiding device (3), wherein the absorption tower (1) has a plurality of adsorption chambers (101) vertically distributed from top to bottom, and each adsorption chamber (101) is provided with a liquid flow guiding device (3), and the liquid flow guiding device (3) is provided with a resin column (5), characterized in that: The adsorption chamber (101) is cylindrical. A regenerated liquid filling chamber (102) and a regenerated waste liquid discharge chamber (103) are symmetrically distributed on the outside of the adsorption chamber (101). The outer wall of the adsorption chamber (101) has multiple sets of first liquid passage holes (1101). A liner plate (12) is provided at the lower part of the adsorption chamber (101). The liner plate (12) has multiple sets of second liquid passage holes (1201). The aqueous phase transport assembly (2) includes several feed pipe groups (21) and discharge pipe groups (22) corresponding to the adsorption chamber (101). The feed pipe groups (21) are arranged above the resin column (5) of each adsorption chamber (101), and the discharge pipe groups (22) are arranged below each liner plate (12). The liquid flow guiding device (3) includes two semi-cylindrical plates (31) and two semi-circular bottom plates (32). Both semi-cylindrical plates (31) have multiple sets of third liquid passage holes (3101), and both semi-circular bottom plates (32) have multiple sets of fourth liquid passage holes (3201). The sum of the unfolding angles of the two semi-circular bottom plates (32) is less than 360 degrees. The two adjacent adsorption chambers (101) are separated by a dividing plate (13). The dividing plate (13) is composed of two closely spaced misaligned plates. The horizontal relative position of the two misaligned plates can be changed. Both misaligned plates are provided with a liquid discharge groove (1301).

2. The acidified aqueous phase adsorption device for cresol synthesis process according to claim 1, characterized in that: The first liquid passage group (1101) consists of multiple vertically arranged perforations at equal intervals. The first liquid passage group (1101) is distributed on the outer wall of the adsorption chamber (101) at a fixed interval. The third liquid passage group (3101) consists of multiple vertically arranged perforations at equal intervals. The third liquid passage group (3101) is distributed on the semi-cylindrical plate (31) at a fixed interval. The distance between two adjacent groups of third liquid passage groups (3101) is not less than the perforation diameter of the first liquid passage group (1101). The distance between two adjacent groups of first liquid passage groups (1101) is also not less than the perforation diameter of the third liquid passage group (3101). The semi-cylindrical plate (31) can be adjusted to the corresponding positions of the first liquid passage group (1101) and the third liquid passage group (3101).

3. The acidified aqueous phase adsorption device for cresol synthesis process according to claim 1, characterized in that: The second liquid passage group (1201) consists of a plurality of perforations arranged radially from the center of the support plate (12) to the edge. The second liquid passage group (1201) is symmetrically arranged on the support plate (12). The fourth liquid passage group (3201) consists of a plurality of perforations arranged radially from the center of the semi-circular bottom plate (32) to the edge. The fourth liquid passage group (3201) is symmetrically arranged on the semi-circular bottom plate (32). The semi-circular bottom plate (32) can be adjusted to the position corresponding to the second liquid passage group (1201) and the fourth liquid passage group (3201).

4. The acidified aqueous phase adsorption device for cresol synthesis process according to claim 1, characterized in that: The regenerated liquid filling chamber (102) is connected to the regenerated feed pipe (6), and the regenerated waste liquid discharge chamber (103) is connected to the discharge pipe (7).

5. The acidified aqueous phase adsorption device for cresol synthesis process according to claim 4, characterized in that: The regeneration feed pipe (6) is equipped with a pump (8) capable of pumping regeneration liquid into the regeneration liquid filling chamber (102).

6. The acidified aqueous phase adsorption device for cresol synthesis process according to claim 1, characterized in that: The absorption tower (1) is also equipped with a switching component (4), which is set in the absorption tower (1) in such a way that the position of each of the semi-cylindrical plates (31) and the two semi-circular bottom plates (32) can be adjusted independently.

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