A device and method for monitoring the precipitation of materials in a solution

Abstract

The present invention discloses a device and method for monitoring the precipitation of materials in a solution, including a reactor, wherein a movable suction mechanism and a density detection mechanism matched with the movable suction mechanism are installed in the reactor, wherein the movable suction mechanism can move in the reactor and collect the solution at the corresponding position, so as to cooperate with the density detection mechanism to detect the density of the solution at each position in the reactor. The device for monitoring the precipitation of materials in a solution collects the solution at different positions in the reactor by suction through the movable suction mechanism, and then delivers the collected solution to the density detection mechanism to detect the density of the solution. The density detection mechanism is more stable in detecting the density of the solution when it is fixed, and has a good detection effect. Therefore, it can stably and real-time detect the density of the solution at each position in the reactor, and assist the control device in analyzing the precipitation of the material in the solution.

Description

Technical Field

[0001] The invention relates to the technical field of solution analysis and detection, and in particular to a device and method for monitoring the precipitation of materials in a solution. Background Art

[0002] In the process of preparing fumaric acid by isomerizing maleic acid with a catalyst, excessively high temperature of the reaction solution will cause the product color to turn yellow, resulting in unqualified products.

[0003] The isomerization process is an exothermic reaction, and normal temperature circulating cooling water is used for cooling in production. When materials begin to precipitate in the reaction solution, the cooling water valve is quickly opened to cool it down. However, the chemical reaction time of the solution is short and the heat release is large. If the cooling water is not opened in time, the reaction solution exceeds the upper limit temperature of the process, resulting in unqualified color of the material. When the reaction heat release and the cooling rate are balanced, personnel need to adjust the cooling water valve to prevent the subsequent reaction from being insufficient due to excessive cooling.

[0004] At present, in the reaction processing of the prior art, the operator mainly observes the reaction solution at all times. When the solution starts to turn from transparent to milky white suspension, the cooling water valve is quickly opened. During the whole reaction process, the heat released by the reaction itself is sufficient to support the temperature of the whole reaction. However, during the cooling process, personnel are required to control the size of the water valve and adjust the cooling speed to prevent the temperature from cooling too fast and falling below the process temperature.

[0005] However, when judging the precipitation of materials in the reaction solution by manual observation, the opening time of the cooling water valve is inaccurate and prone to lag, which in turn has a significant impact on the product color. This problem needs to be solved urgently. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a device and method for monitoring the precipitation of materials in a solution, which can detect the precipitation of materials in the solution in real time.

[0007] In order to solve the above-mentioned technical problems, the present invention is solved by the following technical solutions:

[0008] A device for monitoring the precipitation of materials in a solution comprises a reactor, wherein a movable suction mechanism and a density detection mechanism matched with the movable suction mechanism are installed in the reactor, wherein the movable suction mechanism can move in the reactor and collect the solution at the corresponding position, so as to cooperate with the density detection mechanism to detect the density of the solution at each position in the reactor. The device for monitoring the precipitation of materials in a solution collects the solution at different positions in the reactor by suction through the movable suction mechanism, and then delivers the collected solution to the density detection mechanism to detect the density of the solution. When the density detection mechanism is fixed, the detection of the density of the solution is more stable and has a good detection effect. Therefore, it can stably and real-time detect the density of the solution at each position in the reactor, and assist the control device in analyzing the precipitation of the material in the solution.

[0009] Preferably, the movable suction mechanism includes a positioning guide rail, a suction tube, a driving member, a transmission gear set, a spiral blade and a crank structure. The positioning guide rail is fixed on the inner side wall of the reactor along the longitudinal direction of the reactor, and is provided with a positioning slider. The positioning slider is connected to the suction tube and is movably connected to the crank structure. The other side of the crank structure opposite to the positioning slider is connected to the driving member. The driving member is connected to the spiral blade through the transmission gear set. The spiral blade and the suction tube are both provided in cooperation with the density detection mechanism, so that the spiral blade extracts the solution in the suction tube when it rotates, and the solution flows through the density detection mechanism. This movable suction mechanism can synchronously control the spiral blade to extract the solution in the suction tube through the driving member and control the reciprocating movement of the suction tube through the crank structure and the positioning slider. The structure is simple and reasonable, and the effect of sucking and collecting the solution is good.

[0010] Preferably, the positioning rail includes a first rail portion and a second rail portion which are integrally connected, the first rail portion being a cylindrical structure, and the second rail portion being arranged along the length direction of the positioning rail, extending from one side of the first rail portion and being a square structure. The second rail portion of the positioning rail is arranged in a square structure so that when the positioning slider slides with the positioning rail, the positioning slider can avoid unstable rotation due to the restraint of the second rail portion.

[0011] Preferably, the second guide rail portion is arranged opposite to the inner wall of the reactor, and a connecting channel for circulating the solution is formed therebetween. The upper and lower ends of the second guide rail portion are fixedly connected to the inner wall of the reactor respectively, and the connecting channel is located between the two ends. Because the solution is stirred and rotates during the reaction process, the setting of the connecting channel can prevent the precipitated material from accumulating at this position during the rotational flow, thereby preventing the excessive accumulation of material from extending to the sliding contact portion of the positioning guide rail, thereby ensuring the stability of the sliding between the positioning guide rail and the positioning slider.

[0012] Preferably, the positioning slider is slidably connected to the positioning guide rail, which matches the first guide rail portion and the second guide rail portion respectively, and the suction pipe is penetrated and fixed on the positioning slider.

[0013] Preferably, the crank structure includes a first crank arm and a second crank arm which are rotatably connected to each other, the second crank arm is rotatably connected to the positioning slider, the first crank arm is connected to a power shaft on the transmission gear set, the power shaft passes through the side wall of the reactor, and the power shaft is connected to the output end of the driving member.

[0014] Preferably, the transmission gear set includes a first bevel gear and a second bevel gear meshing with each other, the power shaft is fixed on the first bevel gear, and the rotating shaft of the second bevel gear is connected to the spiral blade. The first bevel gear and the second bevel gear realize effective power transmission of the power shaft driving the spiral blade to rotate.

[0015] Preferably, the density detection mechanism includes a detection shell and a tuning fork density meter, the tuning fork density meter is passed through the side wall of the reactor, and its detection end is connected to the interior of the detection shell, and the detection shell is connected to the inner wall of the reactor.

[0016] Preferably, the other end of the suction pipe opposite to the positioning slider is connected to the detection housing, and the detection housing is provided with a transmission pipe connected to the spiral blade.

[0017] A monitoring method for a device for monitoring the precipitation of a material in a solution comprises the following steps:

[0018] Step 1: inject the reaction solution into the reaction kettle so that the reaction solution covers the movable suction mechanism and the density detection mechanism;

[0019] Step 2: Start the driving member, which drives the crank structure to reciprocate, and then the crank structure drives the positioning slider to reciprocate on the positioning guide rail. The crank structure drives the positioning slider to reciprocate so that the suction tube can collect solutions from various parts;

[0020] Step three: The suction tube moves back and forth with the movement of the positioning slider, and its nozzle is in solutions at different depths. On this basis, the driving member drives the crank structure and drives the rotation of the spiral blade to transport the solution at the position of the suction tube along the direction of the suction tube, the density detection mechanism, and the spiral blade, so that the density detection mechanism can detect the density of the solution at each depth in the reactor in real time, and assist in analyzing the precipitation of materials in the solution.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The device for monitoring the precipitation of materials in the solution collects the solution at different positions in the reactor by sucking through a movable suction mechanism, and then delivers the collected solution to a density detection mechanism to detect the density of the solution. The density detection mechanism is more stable in detecting the density of the solution when it is fixed, and the detection effect is good. Therefore, it can stably and real-time detect the density of the solution at various positions in the reactor, and assist the control device in analyzing the precipitation of the material in the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the present invention when the lid of the reactor is opened and viewed obliquely downward.

[0026] Figure 3 Schematic diagram of the movable suction mechanism, density detection mechanism and part of the reactor shell of the present invention Figure 1 .

[0027] Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0028] Figure 5 Schematic diagram of the movable suction mechanism, density detection mechanism and part of the reactor shell of the present invention Figure 2 .

[0029] Figure 6 for Figure 5 FIG. 1 is a schematic diagram of a structure in which part of the detection shell is removed. FIG.

[0030] Figure 7 It is a structural schematic diagram of the movable suction mechanism and density detection mechanism of the present invention.

[0031] Figure 8 for Figure 7 The schematic diagram of the structure in which the positioning guide rail and positioning slider are removed. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings.

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be used for other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0034] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0035] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0036] See also Figure 1-8 A device for monitoring the precipitation of materials in a solution comprises a reactor 1, a cooling water inlet and a stirring motor for assisting the solution in chemical reaction are provided on the top of the reactor 1, a movable suction mechanism 2 and a density detection mechanism 3 matched with the movable suction mechanism 2 are installed in the reactor 1, the movable suction mechanism 2 can move in the reactor 1 and collect the solution at the corresponding position, so as to cooperate with the density detection mechanism 3 to detect the density of the solution at each position in the reactor 1, after the collected solution at the corresponding position flows through the density detection mechanism 3, the density detection mechanism 3 detects the density of the corresponding solution, and then obtains the precipitation of the material in the reaction solution through analysis by the control device, so that the opening size of the cooling water valve can be automatically controlled by the control device.

[0037] The movable suction mechanism 2 includes a positioning guide rail 21, a suction pipe 22, a driving member 23, a transmission gear set, a spiral blade 24 and a crank structure 25. The driving member 23 is a driving motor. The positioning guide rail 21 is fixed on the inner wall of the reactor 1 along the longitudinal direction of the reactor 1, and is equipped with a positioning slider 26. The positioning slider 26 is connected to the suction pipe 22 and is movably connected to the crank structure 25. The other side of the crank structure 25 opposite to the positioning slider 26 is connected to the driving member 23. The driving member 23 is arranged on the outside of the reactor 1 and is connected to the transmission gear set through a power shaft 27 at the output end. The driving member 23 is connected to the spiral blade 24 through a transmission gear set. A recovery shell is arranged on the outer side of the spiral blade 24 and the transmission gear set. The power shaft 27 is passed through the recovery shell. The recovery shell is connected to the detection shell 31 through a transmission pipe 33. The spiral blade 24 is located in the recovery shell close to the transmission pipe 33 so as to more efficiently draw the solution in the suction tube 22. The spiral blade 24 and the suction tube 22 are both arranged in cooperation with the density detection mechanism 3 so that the solution in the suction tube 22 is drawn when the spiral blade 24 rotates, so that the solution flows through the density detection mechanism 3.

[0038] The end of the power shaft 27 passes through the recovery shell and is connected to the first crank arm 251 of the crank structure 25. The power shaft 27 drives the first crank arm 251 and the second crank arm 252 to rotate, and then drives the positioning slider 26 to reciprocate up and down on the positioning guide rail 21. The second crank arm 252 is rotationally connected to the positioning slider 26. When working, it pushes or stretches the positioning slider 26 while rotating relative to the positioning slider 26.

[0039] The positioning guide rail 21 includes a first guide rail portion 211 and a second guide rail portion 212 which are integrally connected. The first guide rail portion 211 is a cylindrical structure with a smooth outer surface. The second guide rail portion 212 is arranged along the length direction of the positioning guide rail 21, extends from one side of the first guide rail portion 211 and has a square structure. The positioning slider 26 slides with the first guide rail portion 211 and the second guide rail portion 212 in a matching manner. The second guide rail portion 212 of the positioning guide rail 21 is arranged in a square structure so that when the positioning slider 26 slides with the positioning guide rail 21, the positioning slider 26 can avoid unstable rotation activities (the positioning slider 26 rotates circumferentially along the positioning guide rail 21) due to the interference restriction with the second guide rail portion 212.

[0040] The second rail portion 212 is disposed opposite to the inner wall of the reactor 1, and a connecting channel 213 for circulating the solution is formed therebetween. That is, the upper and lower ends of the second rail portion 212 are respectively fixedly connected to the inner wall of the reactor 1, and the connecting channel 213 is located between the two ends. Because the solution is stirred and rotates during the reaction process, the setting of the connecting channel 213 can prevent the precipitated material from accumulating at this position during the rotational flow, thereby preventing the excessively accumulated material from extending to the sliding contact portion of the positioning rail 21, thereby ensuring the stability of the sliding between the positioning rail 21 and the positioning slider 26.

[0041] The positioning slider 26 is slidably connected to the positioning rail 21, and is matched with the first rail portion 211 and the second rail portion 212 respectively. The suction pipe 22 is fixed on the positioning slider 26. Specifically, one end of the pipe opening of the suction pipe 22 is fixed on the positioning slider 26. The suction pipe 22 is made of a retractable material and can be stretched or retracted.

[0042] The crank structure 25 includes a first crank arm 251 and a second crank arm 252 which are rotatably connected to each other. The second crank arm 252 is rotatably connected to the positioning slider 26. The first crank arm 251 is connected to a power shaft 27 on the transmission gear set. The power shaft 27 passes through the side wall of the reactor 1. The power shaft 27 is connected to the output end of the driving member 23.

[0043] The transmission gear set includes a first bevel gear 281 and a second bevel gear 282 which are meshed with each other. The power shaft 27 is fixed on the first bevel gear 281. The rotating shaft of the second bevel gear 282 is connected to the spiral blade 24, so that the spiral blade 24 is driven to rotate by the power shaft 27. A separation shell 283 is arranged outside the first bevel gear 281 and the second bevel gear 282. The separation shell 283 is arranged outside the first bevel gear 281 and the second bevel gear 282. The power shaft 27 is passed through the separation shell 283. A seal is arranged at the connection between the two. The rotating shaft of the second bevel gear 282 is also passed through the separation shell 283. A seal is arranged at the connection between the two. The setting of the separation shell 283 can make the first bevel gear 281 and the second bevel gear 282 in a relatively independent and closed space, so as to prevent excessive external medium from flowing to the first bevel gear 281 and the second bevel gear 282 and then affecting the stability of power transmission.

[0044] The density detection mechanism 3 includes a detection shell 31 and a tuning fork density meter 32. The tuning fork density meter 32 is passed through the side wall of the reactor 1, and its detection end is located on the inner side of the reactor 1. The detection end of the tuning fork density meter 32 is connected to the inside of the detection shell 31. The detection shell 31 is a closed shell with two openings, and the detection shell 31 is connected to the inner wall of the reactor 1.

[0045] The other end of the suction tube 22 opposite to the positioning slider 26 is connected (communicated) to the detection housing 31 , so that the solution in the suction tube 22 can flow into the detection housing 31 . The detection housing 31 is provided with a transmission tube 33 connected to the spiral blade 24 .

[0046] A monitoring method for a device for monitoring the precipitation of a material in a solution comprises the following steps:

[0047] Step 1: Input the reaction solution into the reaction kettle 1 so that the reaction solution covers the movable suction mechanism 2 and the density detection mechanism 3 .

[0048] Step 2: Start the driving member 23 , which drives the crank structure 25 to reciprocate, and then the crank structure 25 drives the positioning slider 26 to reciprocate on the positioning guide rail 21 .

[0049] Step three: The suction tube 22 moves back and forth with the movement of the positioning slider 26, and its tube mouth is correspondingly in the solution at different depths. On this basis, the driving member 23 drives the crank structure 25 and drives the rotation of the spiral blade 24 at the same time, so that the solution at the position of the suction tube 22 is transported along the direction of the suction tube 22, the density detection mechanism 3, and the spiral blade 24, so that the density detection mechanism 3 can detect the density of the solution at each depth position in the reactor 1 in real time, and assist in analyzing the precipitation of the material in the solution.

[0050] During operation, the driving member 23 drives the power shaft 27 to rotate, and the power shaft 27 drives the spiral blade 24 to rotate through the transmission gear set. The spiral blade 24 sucks the reaction solution transported by the suction tube 22, the detection shell 31, and the transmission tube 33. When the reaction solution passes through the detection shell 31, the tuning fork density meter 32 can detect the density of the solution collected by the suction tube 22 at the current position. At the same time, the power shaft 27 drives the crank structure 25 to move, and then the crank structure 25 drives the positioning slider 26 to reciprocate up and down, so that the positioning slider 26 drives the suction tube 22 to move up and down and collect solutions at various height positions, so as to detect the density of the solution in the reactor 1 in real time.

[0051] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A device for monitoring the precipitation of a material in a solution, comprising a reaction kettle (1), characterized in that: The reactor (1) is provided with a movable suction mechanism (2) and a density detection mechanism (3) coordinated with the movable suction mechanism (2). The movable suction mechanism (2) is capable of moving in the reactor (1) and collecting solution at corresponding locations, so as to cooperate with the density detection mechanism (3) to detect the density of solution at various locations in the reactor (1). The movable suction mechanism (2) comprises a positioning guide rail (21), a suction pipe (22), a driving member (23), a transmission gear set, a spiral blade (24) and a crank structure (25). The positioning guide rail (21) is fixed to the inner side wall of the reactor (1) along the longitudinal direction of the reactor (1). The positioning slide block (26) is provided in cooperation with the positioning slide block (26), the positioning slide block (26) is connected to the suction tube (22) and is movably connected to the crank structure (25), the other side of the crank structure (25) opposite to the positioning slide block (26) is connected to the driving member (23), the driving member (23) is connected to the spiral blade (24) via a transmission gear set, the spiral blade (24) and the suction tube (22) are both provided in cooperation with the density detection mechanism (3), so that when the spiral blade (24) rotates, the solution in the suction tube (22) is extracted, and the solution flows through the density detection mechanism (3), the positioning guide rail (21) comprises a first guide rail portion (21) connected in an integral manner 1), a second guide rail portion (212), the first guide rail portion (211) being in a cylindrical structure, the second guide rail portion (212) being arranged along the length direction of the positioning guide rail (21), extending from one side of the first guide rail portion (211) and being in a square structure, the second guide rail portion (212) being arranged opposite to the inner side wall of the reaction kettle (1), forming a connecting channel (213) for circulating solution therebetween, the positioning slider (26) being slidably connected to the positioning guide rail (21), matching the first guide rail portion (211) and the second guide rail portion (212) respectively, the suction pipe (22) being inserted and fixed on the positioning slider (26), the crank structure (2 5) comprises a first crank arm (251) and a second crank arm (252) which are rotatably connected to each other, the second crank arm (252) is rotatably connected to a positioning slider (26), the first crank arm (251) is connected to a power shaft (27) on a transmission gear set, the power shaft (27) passes through the side wall of the reaction kettle (1), the power shaft (27) is connected to the output end of the driving member (23), the transmission gear set comprises a first bevel gear (281) and a second bevel gear (282) which are meshed with each other, the power shaft (27) is fixed on the first bevel gear (281), and the rotating shaft of the second bevel gear (282) is connected to a spiral blade (24).

2. A device for monitoring the precipitation of materials in a solution according to claim 1, characterized in that: The density detection mechanism (3) comprises a detection housing (31) and a tuning fork density meter (32); the tuning fork density meter (32) is inserted into the side wall of the reaction kettle (1); a detection end of the tuning fork density meter (32) is connected to the interior of the detection housing (31); and the detection housing (31) is connected to the inner wall of the reaction kettle (1).

3. A device for monitoring the precipitation of materials in a solution according to claim 2, characterized in that: The other end of the suction pipe (22) opposite to the positioning slide block (26) is connected to the detection housing (31), and the detection housing (31) is provided with a transmission pipe (33) connected to the spiral blade (24).

4. A monitoring method for the device for monitoring the precipitation of materials in a solution according to claim 3, characterized in that: The method comprises the following steps: Step 1: injecting a reaction solution into a reaction kettle (1) so that the reaction solution covers the movable suction mechanism (2) and the density detection mechanism (3); Step 2: starting a driving member (23), wherein the driving member (23) drives the crank structure (25) to reciprocate, and then the crank structure (25) drives the positioning slider (26) to reciprocate on the positioning guide rail (21); Step 3: the suction pipe (22) reciprocates along with the movement of the positioning slider (26), and its pipe mouth is correspondingly located in solutions at different depths. On this basis, the driving member (23) drives the crank structure (25) and drives the spiral blade (24) to rotate at the same time, so that the solution at the position of the suction pipe (22) is transported along the direction of the suction pipe (22), the density detection mechanism (3), and the spiral blade (24), so that the density detection mechanism (3) can detect the density of the solution at each depth position in the reaction kettle (1) in real time, and assist in analyzing the precipitation of the material in the solution.

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