Normal hexane purification and recovery system for grain and oil industry and use method of normal hexane purification and recovery system

Abstract

The invention relates to the technical field of n-hexane recovery, in particular to an n-hexane purification and recovery system for the grain and oil industry and a use method of the n-hexane purification and recovery system. And the desorption device is connected with the recovery device. According to the n-hexane purification and recovery system for the grain and oil industry and the use method of the n-hexane purification and recovery system, the problems that the continuous recovery efficiency of n-hexane is affected, the operation cost and the labor intensity are increased, and the normal hexane cannot be recovered in the replacement or regeneration period of the paraffin oil due to the fact that the operation of the whole system needs to be stopped when the saturated paraffin oil is replaced are avoided. Shutdown of the exhaust gas treatment system leads to production interruption, which is a particularly unfavorable problem on continuous production lines.

Description

Technical Field

[0001] The invention relates to the technical field of n-hexane recovery, and in particular to a n-hexane purification and recovery system for grain and oil industry and a use method thereof. Background Art

[0002] n-Hexane is a chemical solvent with certain toxicity. Long-term exposure can cause chronic poisoning symptoms such as headache, dizziness, fatigue, numbness of limbs, etc. in the human body. Severe cases can lead to fainting or even loss of consciousness. In the grain and oil industry, n-hexane is often used as a solvent. Its recovery and reuse are crucial to environmental protection and cost control. The n-hexane recovery devices in oil and fat factories currently on the market directly discharge the gas from the leaching workshop after two-stage condensation recovery, which has certain harmful effects on the environment. At the same time, the operation is complicated and the operating system is not user-friendly. The widely used method is to adsorb n-hexane in the exhaust gas through granular activated carbon. Granular activated carbon is selected for its good adsorption and desorption properties. It can effectively remove n-hexane from the exhaust gas to reduce the impact on the environment and recover precious chemicals. However, there is a significant limitation in using activated carbon as an adsorption medium. Activated carbon is easily saturated. Once saturated, it can no longer adsorb n-hexane and needs to be replaced or regenerated. Replacing saturated activated carbon usually requires stopping the operation of the entire system, which not only affects the continuous recovery efficiency of n-hexane, but also increases operating costs and labor intensity. During the replacement or regeneration of activated carbon, the shutdown of the exhaust gas treatment system leads to production interruption, which is particularly unfavorable on a continuous production line. Moreover, when using activated carbon to adsorb n-hexane, the adsorption efficiency of activated carbon will be greatly reduced after the n-hexane is desorbed later, and activated carbon cannot be recycled indefinitely. Summary of the invention

[0003] In order to solve the problem of n-hexane purification and recovery equipment used in the grain and oil industry on the market, once the activated carbon is saturated, it can no longer adsorb n-hexane and needs to be replaced or regenerated. Replacing the saturated activated carbon usually requires stopping the operation of the entire system, which not only affects the continuous recovery efficiency of n-hexane, but also increases operating costs and labor intensity. During the replacement or regeneration of activated carbon, the shutdown of the exhaust gas treatment system leads to production interruption, which is particularly unfavorable on a continuous production line; and the problem that activated carbon cannot be recycled indefinitely.

[0004] To achieve the above-mentioned purpose, the present application proposes a n-hexane purification and recovery system for the grain and oil industry, comprising a recovery device, the recovery device containing paraffin oil; a desorption device, the desorption device being connected to the recovery device; The recovery device includes an operating table, a supporting table and a normal hexane recovery switching mechanism, the outer walls of the operating table and the supporting table are respectively fixedly connected with a first supporting head and a second supporting head in a circular array, the support rod is arranged between the first supporting head and the second supporting head, and the two are connected through the support rod, the normal hexane recovery switching mechanism includes an intake pipe, a connecting hose, a switching component, a connecting component, a recovery bin, a supporting component, a recovery component and a monitoring component, wherein the intake pipe is fixedly connected to the outer wall of the supporting table, the switching component is installed on the top of the operating table, and the recovery bin is connected to the desorption device through a power component; the connecting component is installed on the switching component, the connecting hose is arranged between the connecting component and the intake pipe, and the two are connected through the connecting hose, a plurality of the recovery bins are fixedly connected to the top of the supporting table in a circular array, the supporting component is installed on the inner wall of the recovery bin, the recovery component is installed on the supporting component, the monitoring component is arranged between the supporting component and the recovery component, and the two are connected through the monitoring component.

[0005] In the n-hexane purification and recovery system for the grain and oil industry in the embodiment of the present application, when the paraffin oil adsorption in a certain filter bin reaches the saturation point, the control system automatically triggers the switching component. Under the action of the switching component, the adsorption saturated filter bin will be moved out of the working position, and a new filter bin will be moved into the working position to continue the filtering operation, thereby avoiding the need to stop the operation of the entire system usually to replace the saturated paraffin oil.

[0006] Furthermore, the switching assembly includes a mounting seat, a drive motor, a support arm and a support seat, wherein the mounting seat is installed on the top of the operating table by fastening bolts, the drive motor is installed on the top of the mounting seat, and the support arm is arranged between the support seat and the output end of the drive motor and is connected through the support arm.

[0007] Furthermore, the connecting assembly includes a cylinder, a driving rod, a snap-on cap and a snap-on nozzle, wherein the cylinder is installed at the bottom of the support seat, the output end of the cylinder passes through the bottom of the support seat and is fixedly connected to one end of the driving rod, the snap-on cap is fixedly connected to the other end of the driving rod, and the snap-on nozzle is fixedly connected to the bottom of the support platform.

[0008] Furthermore, the supporting assembly includes a supporting sleeve, a mounting groove, a supporting spring, a connecting arm and a supporting block, wherein the supporting sleeve is fixedly connected to the inner wall of the recycling bin, the mounting groove is opened on the inner wall of the supporting sleeve, a plurality of the supporting springs are fixedly connected to the inner wall of the mounting groove in a circular array, the recycling assembly is clamped on the inner wall of the mounting groove through the supporting springs, one end of a plurality of the connecting arms is fixedly connected to the bottom of the supporting sleeve in a circular array, and the supporting block is fixedly connected to the other end of the connecting arm.

[0009] Furthermore, the recovery component includes a filter bin and a connecting pipe, wherein the bottom of the filter bin is clamped in the mounting groove through the support spring, an air inlet hole is provided at the bottom of the filter bin, and the connecting pipe is provided between the top of the filter bin and the inner top of the recovery bin, and they are connected through the connecting pipe; an electromagnetic valve is installed on the outer wall of the air inlet pipe.

[0010] Furthermore, the monitoring component includes a resistance block, a pressure sensor and a controller, wherein the resistance block is fixedly connected to the bottom of the filter bin, the pressure sensor is embedded in the top of the support block, and the resistance block resists on the pressure sensor, and the controller is installed on the top of the support platform.

[0011] Furthermore, a discharge pipe is installed on the top of the recovery bin, the discharge pipe is connected to the desorption device through a power component, and an inspection door is installed on the outer wall of the recovery bin.

[0012] Furthermore, the pressure sensor is electrically connected to the controller, and the controller is electrically connected to an external power source.

[0013] A method for using a n-hexane purification and recovery system for the grain and oil industry comprises the following steps: S1. System component configuration: each filter chamber is filled with an appropriate amount of paraffin oil, and each filter chamber is placed in an independent recovery chamber; S2, filter start, introduce the waste gas containing n-hexane from the production line into the system, ensure that the waste gas passes through each filter bin filled with paraffin oil evenly, the paraffin oil will absorb the n-hexane in the waste gas, when the waste gas passes through the paraffin oil, the n-hexane is absorbed, and the purified gas enters the recovery bin; S3, monitoring and weight detection, using sensors to monitor the weight of the paraffin oil in each of the filter bins. Once the weight of the paraffin oil increases to a preset threshold, it is considered that the adsorption is saturated. The weight data is fed back to the central control system for analyzing the adsorption efficiency of the paraffin oil and determining the replacement time; S4, automatically switching the filter bins. When the paraffin oil adsorption of a filter bin reaches the saturation point, the control system automatically triggers the switching component. Under the action of the switching component, the filter bin with saturated adsorption will be moved out of the working position, and a new filter bin will be moved into the working position to continue the filtering operation. S5, paraffin oil regeneration or replacement, the saturated paraffin oil is pumped from the recovery bin to the desorption device through the power assembly, and the desorption device separates the saturated paraffin oil. Additional aspects and advantages of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present application.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, a switching component is provided, and a driving motor, a support arm and a support seat in the switching component are utilized. By starting the driving motor, the support arm is driven to rotate, and then the support seat is driven to adjust its position, so that the position of the connecting component can be adjusted synchronously. Therefore, after the paraffin oil in one of the filter bins is saturated, the recovery bin can be conveniently replaced, thereby ensuring that the purification and recovery process remains smooth and improving the purification and recovery efficiency.

[0015] 2. In the present invention, a connecting assembly is provided, and after the position of the support seat is adjusted through the snap-on cap and the snap-on nozzle in the connecting assembly, the cylinder is started to drive the snap-on cap to snap on the snap-on nozzle, so that the inflow channel of the exhaust gas can be easily replaced, thereby avoiding the need to stop the operation of the entire system when replacing the saturated paraffin oil, which not only affects the continuous recovery efficiency of n-hexane, but also increases the operating cost and labor intensity.

[0016] 3. In the present invention, a monitoring component is provided, and the resistance block, pressure sensor and controller in the monitoring component are utilized. When the weight of the filter bin gradually increases, the pressure of the resistance block on the pressure sensor gradually increases, and then the pressure signal is transmitted to the controller, thereby driving the drive motor and the cylinder to work through the controller, so that the flow position of the air supply can be easily changed, thereby avoiding the shutdown of the exhaust gas treatment system during the replacement or regeneration of the paraffin oil, resulting in production interruption, which is a particularly disadvantageous problem on a continuous production line.

[0017] 4. In the present invention, the paraffin oil desorption device separates the paraffin oil from n-hexane, and the separated paraffin oil can be recycled indefinitely, thereby avoiding irreversible damage to the activated carbon caused by desorption after adsorption of n-hexane. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a flow chart of the n-hexane purification and recovery system for the grain and oil industry of the present invention; Figure 2The structure of the n-hexane purification and recovery system for the grain and oil industry of the present invention is shown in FIG. Figure 1 ; Figure 3 The structure of the n-hexane purification and recovery system for the grain and oil industry of the present invention is shown in FIG. Figure 2 ; Figure 4 It is a structural schematic diagram of the switching component of the present invention; Figure 5 It is a structural schematic diagram of the bottom of the supporting platform of the present invention; Figure 6 This is a schematic diagram of the structure inside the recovery bin of the present invention; Figure 7 It is a structural schematic diagram of the installation slot of the present invention; Figure 8 For the present invention Figure 6 A schematic diagram of the structure with a partial enlargement at the center; Fig. 9 It is a schematic structural diagram of the pressure sensor of the present invention.

[0019] In the figure: 1, operating table; 2, first support head; 3, support rod; 4, second support head; 5, support platform; 6, n-hexane recovery switching mechanism; 61, air intake pipe; 611, solenoid valve; 62, connecting hose; 63, switching assembly; 631, mounting seat; 6311, fastening bolt; 632, driving motor; 633, support arm; 634, support seat; 64, connecting assembly; 641, cylinder; 642, driving rod; 6 43. snap-on cap; 644. snap-on nozzle; 65. recovery bin; 651. discharge pipe; 652. inspection door; 66. supporting assembly; 661. support sleeve; 662. mounting groove; 663. support spring; 664. connecting arm; 665. support block; 67. recovery assembly; 671. filter bin; 672. connecting pipe; 68. monitoring assembly; 681. resistance block; 682. pressure sensor; 683. controller. DETAILED DESCRIPTION

[0020] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0021] The following describes the n-hexane purification and recovery system for the grain and oil industry and its use method according to an embodiment of the present application in conjunction with the accompanying drawings.

[0022] The embodiment of the present application provides a n-hexane purification and recovery system for the grain and oil industry, which can solve the problem that once the activated carbon is saturated, it can no longer adsorb n-hexane and needs to be replaced or regenerated. Replacing the saturated activated carbon usually requires stopping the operation of the entire system, which not only affects the continuous recovery efficiency of n-hexane, but also increases operating costs and labor intensity. During the replacement or regeneration of the activated carbon, the shutdown of the exhaust gas treatment system causes production interruption, which is particularly unfavorable on a continuous production line, and solves the problem that the activated carbon cannot be recycled indefinitely.

[0023] like Figure 1 As shown, the n-hexane purification and recovery system for the grain and oil industry of the embodiment of the present application includes a recovery device, the recovery device contains paraffin oil; and a desorption device, the desorption device is connected to the recovery device.

[0024] It should be noted that the paraffin oil in the recovery device adsorbs n-hexane, and after reaching saturation, it enters the desorption device, which separates the paraffin oil from n-hexane. The separated paraffin oil can be recycled indefinitely, avoiding waste of resources.

[0025] like Figure 2-Figure 9 As shown, the recovery device includes an operating table 1, a supporting table 5 and a n-hexane recovery switching mechanism 6, the outer walls of the operating table 1 and the supporting table 5 are respectively fixedly connected with a first support head 2 and a second support head 4 in a circumferential array, and a support rod 3 is arranged between the first support head 2 and the second support head 4, and the first support head 2 and the second support head 4 are connected by the support rod 3; The n-hexane recovery switching mechanism 6 includes an air intake pipe 61 , a connecting hose 62 , a switching component 63 , a connecting component 64 , a recovery bin 65 , a supporting component 66 , a recovery component 67 and a monitoring component 68 .

[0026] The air intake pipe 61 is fixedly connected to the outer wall of the supporting platform 5 , and a solenoid valve 611 is installed on the outer wall of the air intake pipe 61 .

[0027] It should be noted that an air intake channel is provided inside the supporting platform 5 described in this embodiment, and reinforcement heads are provided between the first supporting head 2 and the second supporting head 4 and the operating table 1 and the supporting platform 5, and are fixedly connected by the reinforcement heads.

[0028] The switching assembly 63 is installed on the top of the operating table 1 , and the connecting assembly 64 is installed on the switching assembly 63 . A connecting hose 62 is provided between the connecting assembly 64 and the air intake pipe 61 , and they are connected through the connecting hose 62 .

[0029] It should be noted that the bottom of the supporting platform 5 described in this embodiment is fixedly connected to a mounting plate, and one end of the connecting hose 62 passes through the mounting plate and is connected to the end of the air intake pipe 61.

[0030] A plurality of recovery bins 65 are fixedly connected to the top of the supporting platform 5 in a circular array, and the recovery bins 65 are connected to the desorption device via a power assembly.

[0031] It should be noted that the power component may be a pump or other components, and the power component pumps the saturated paraffin oil in the recovery bin 65 into the desorption device.

[0032] Furthermore, if Figure 2 As shown, a discharge pipe 651 is installed on the top of the recovery bin 65 , and the discharge pipe 651 is connected to the desorption device through a power component. An inspection door 652 is installed on the outer wall of the recovery bin 65 .

[0033] It should be noted that a valve body is installed on the outer wall of the discharge pipe 651 described in this embodiment, a handle is installed on the outer wall of the inspection door 652, and an anti-slip sleeve is sleeved on the outer wall of the handle.

[0034] The supporting assembly 66 is installed on the inner wall of the recovery bin 65 , and the recovery assembly 67 is installed on the supporting assembly 66 . A monitoring assembly 68 is provided between the supporting assembly 66 and the recovery assembly 67 , and the two are connected via the monitoring assembly 68 .

[0035] It should be noted that an air inlet is provided at the bottom of the recovery bin 65 described in this embodiment, and the air inlet is connected to the connecting component 64 .

[0036] Specifically, in the production process of the grain and oil industry, it is necessary to purify and recycle n-hexane. In order to improve the efficiency of recycling, the air intake pipe 61 is fixedly connected to the outer wall of the support platform 5, the switching component 63 is installed on the top of the operating table 1, and the connecting component 64 is installed on the switching component 63. A connecting hose 62 is provided between the connecting component 64 and the air intake pipe 61, and they are connected through the connecting hose 62. A plurality of recovery bins 65 are fixedly connected to the top of the support platform 5 in a circular array, a supporting component 66 is installed on the inner wall of the recovery bin 65, and a recovery component 67 is installed on the supporting component 66. A monitoring component 68 is provided between the supporting component 66 and the recovery component 67, and they are connected through the monitoring component 68, thereby introducing the waste gas containing n-hexane from the production line into the system to ensure that the waste gas passes evenly through each filter bin 67 filled with paraffin oil. 1. Paraffin oil will absorb n-hexane in the exhaust gas. When the exhaust gas passes through the paraffin oil, n-hexane is absorbed, and the purified gas enters the recovery bin 65. Monitoring and weight detection use sensors to monitor the weight of the paraffin oil in each filter bin 671. Once the weight of the paraffin oil increases to a preset threshold, it is considered that the adsorption is saturated. The weight data is fed back to the central control system to analyze the adsorption efficiency of the paraffin oil and determine the replacement time. The filter bin 671 is automatically switched. When the paraffin oil adsorption of a certain filter bin 671 reaches the saturation point, the control system automatically triggers the switching component 63. Under the action of the switching component 63, the saturated filter bin 671 will be moved out of the working position, and a new filter bin 671 will be moved into the working position to continue the filtering operation, thereby avoiding the need to stop the operation of the entire system when replacing saturated paraffin oil.

[0037] In order to clearly illustrate the above embodiment, in an example of the present application, Figure 2-Figure 9 As shown, the switching assembly 63 includes a mounting base 631, a driving motor 632, a support arm 633 and a support base 634, wherein the mounting base 631 is installed on the top of the operating table 1 by means of a fastening bolt 6311, the driving motor 632 is installed on the top of the mounting base 631, and a support arm 633 is arranged between the support base 634 and the output end of the driving motor 632, and they are connected through the support arm 633.

[0038] It should be noted that the support arm 633 described in this embodiment is an L-shaped structure.

[0039] Specifically, when the paraffin oil in one of the filter chambers 671 is saturated, the mounting seat 631 is installed on the top of the operating table 1 by fastening bolts 6311, and the driving motor 632 is installed on the top of the mounting seat 631. A support arm 633 is provided between the support seat 634 and the output end of the driving motor 632, and they are connected through the support arm 633. Then, by starting the driving motor 632, it drives the support arm 633 to rotate, and then the support seat 634 can be driven to adjust its position, so that the position of the connecting component 64 can be adjusted synchronously. Therefore, after the paraffin oil in one of the filter chambers 671 is saturated, the recovery chamber 65 can be conveniently replaced to ensure that the purification and recovery process remains smooth and the purification and recovery efficiency is improved.

[0040] Since the present embodiment is provided with a drive motor 632, a support arm 633 and a support base 634, the filter bin 671 after being saturated with paraffin oil can be replaced by an automated robotic arm, thereby reducing the need for the operator to directly contact the filter material that may contain harmful substances, thereby reducing the health risks to the workers and reducing maintenance costs. The automated replacement mechanism can reduce the errors or damage that may be caused by manual replacement of the filter material, thereby extending the service life of the equipment and reducing maintenance costs.

[0041] In one embodiment of the present application, Figure 2-Figure 9 As shown, the connecting assembly 64 includes a cylinder 641, a driving rod 642, a snap-on cap 643 and a snap-on nozzle 644, wherein the cylinder 641 is installed at the bottom of the support seat 634, the output end of the cylinder 641 passes through the bottom of the support seat 634, and is fixedly connected to one end of the driving rod 642, the snap-on cap 643 is fixedly connected to the other end of the driving rod 642, and the snap-on nozzle 644 is fixedly connected to the bottom of the support platform 5.

[0042] It should be noted that the outer wall of the snap-fit ​​nozzle 644 described in this embodiment is abutted against the inner wall of the snap-fit ​​cap 643 , the number of the snap-fit ​​nozzles 644 is the same as the number of the recovery bins 65 , and the bottom of the recovery bins 65 is connected to the top of the snap-fit ​​nozzle 644 .

[0043] Specifically, in order to ensure more efficient transportation of exhaust gas, the cylinder 641 is installed at the bottom of the support seat 634, and the output end of the cylinder 641 passes through the bottom of the support seat 634 and is fixedly connected to one end of the driving rod 642. The snap-on cap 643 is fixedly connected to the other end of the driving rod 642, and the snap-on nozzle 644 is fixedly connected to the bottom of the supporting platform 5. After the position of the support seat 634 is adjusted, the cylinder 641 is started to drive the snap-on cap 643 to snap onto the snap-on nozzle 644, so that the inflow channel of the exhaust gas can be easily replaced, thereby avoiding the need to stop the operation of the entire system when replacing the saturated paraffin oil, which not only affects the continuous recovery efficiency of n-hexane, but also increases the operating cost and labor intensity.

[0044] This embodiment can achieve rapid changes in the direction of exhaust gas flow through the rapid action of cylinder 641, can more flexibly respond to sudden changes in operating conditions or fluctuations in exhaust gas flow, and reduce energy consumption. Compared with manual operation, cylinder 641 can accurately control the time and range of the action.

[0045] In one embodiment of the present application, Figure 2-Figure 9 As shown, the supporting assembly 66 includes a supporting sleeve 661, a mounting groove 662, a supporting spring 663, a connecting arm 664 and a supporting block 665, wherein the supporting sleeve 661 is fixedly connected to the inner wall of the recovery bin 65, the mounting groove 662 is opened on the inner wall of the supporting sleeve 661, a plurality of supporting springs 663 are fixedly connected to the inner wall of the mounting groove 662 in a circular array, the recovery assembly 67 is clamped on the inner wall of the mounting groove 662 through the supporting spring 663, one end of a plurality of connecting arms 664 is fixedly connected to the bottom of the supporting sleeve 661 in a circular array, and the support block 665 is fixedly connected to the other end of the connecting arm 664.

[0046] It should be noted that the connecting arm 664 described in this embodiment is an L-shaped structure, and the supporting block 665 is located at the center of the supporting sleeve 661 .

[0047] Specifically, in order to effectively support the recovery component 67, the support sleeve 661 is fixedly connected to the inner wall of the recovery bin 65, the mounting groove 662 is opened on the inner wall of the support sleeve 661, and multiple support springs 663 are fixedly connected to the inner wall of the mounting groove 662 in a circular array. The recovery component 67 is clamped on the inner wall of the mounting groove 662 through the support springs 663, and one end of multiple connecting arms 664 is fixedly connected to the bottom of the support sleeve 661 in a circular array. The support block 665 is fixedly connected to the other end of the connecting arm 664. When the n-hexane in the exhaust gas is purified and recovered by the recovery component 67, the weight gradually increases. Under the action of the support springs 663, the structure of the recovery component 67 is ensured to be more stable.

[0048] In this embodiment, the support spring 663 can effectively absorb the vibration generated during the operation of the equipment, reduce the mechanical impact on the recovery component 67, extend the service life of the equipment, and adaptively adjust. As the n-hexane is purified and recovered, the weight of the recovery component 67 gradually increases. The support spring 663 can automatically adjust the pressure according to the change in load to maintain the stability of the structure.

[0049] In one embodiment of the present application, Figure 2-Figure 9As shown, the recovery component 67 includes a filter bin 671 and a connecting pipe 672, wherein the bottom of the filter bin 671 is clamped in the mounting groove 662 by a support spring 663, an air inlet hole is provided at the bottom of the filter bin 671, and a connecting pipe 672 is provided between the top of the filter bin 671 and the inner top of the recovery bin 65, and they are connected through the connecting pipe 672.

[0050] It should be noted that paraffin oil is stored inside the filter bin 671 described in this embodiment.

[0051] Specifically, in order to effectively purify and recover n-hexane, the bottom of the filter bin 671 is clamped in the mounting groove 662 through the support spring 663, and an air inlet hole is opened at the bottom of the filter bin 671. A connecting pipe 672 is provided between the top of the filter bin 671 and the inner top of the recovery bin 65, and they are connected through the connecting pipe 672, and then the bottom of the filter bin 671 is clamped at the end of the support spring 663, and then the exhaust gas is input through the air inlet hole at the bottom of the filter bin 671, and is purified and recovered by the paraffin oil inside the filter bin 671, and the purified exhaust gas is discharged through the connecting pipe 672.

[0052] This embodiment effectively reduces maintenance time and cost, improves energy saving effects, and reduces resistance with more efficient gas flow, thereby reducing energy requirements for equipment such as pumps and fans, through the combination of the filter bin 671 and the connecting pipe 672.

[0053] In one embodiment of the present application, Figure 2-Figure 9 As shown, the monitoring component 68 includes a resistance block 681, a pressure sensor 682 and a controller 683, wherein the resistance block 681 is fixedly connected to the bottom of the filter bin 671, the pressure sensor 682 is embedded in the top of the support block 665, and the resistance block 681 is in resistance to the pressure sensor 682, and the controller 683 is installed on the top of the support platform 5.

[0054] Furthermore, if Figure 2 As shown, the pressure sensor 682 is electrically connected to the controller 683, and the controller 683 is electrically connected to an external power source.

[0055] It should be noted that the driving motor 632 and the cylinder 641 described in this embodiment are both electrically connected to the controller 683, and the controller 683 is electrically connected to an external power source.

[0056] Specifically, in order to be able to promptly understand that the paraffin oil is tending to be saturated, the resistance block 681 is fixedly connected to the bottom of the filter bin 671, the pressure sensor 682 is embedded in the top of the support block 665, and the resistance block 681 is in contact with the pressure sensor 682, and the controller 683 is installed on the top of the support platform 5. Then, when the weight of the filter bin 671 gradually increases, the pressure of the resistance block 681 in contact with the pressure sensor 682 gradually increases, and then the pressure signal is transmitted to the controller 683, thereby the controller 683 can drive the drive motor 632 and the cylinder 641 to work, so that the air flow position can be easily replaced, thereby avoiding the shutdown of the exhaust gas treatment system during the replacement or regeneration of the paraffin oil, resulting in production interruption, which is a particularly unfavorable problem on a continuous production line.

[0057] This embodiment transmits real-time pressure signals to the controller 683 via the pressure sensor 682. By real-time monitoring and adjusting the use of paraffin oil, it can ensure that the paraffin oil always works in the best condition and avoid excessive use or premature replacement, thereby saving materials and energy and improving safety. The automated monitoring and control system reduces the frequency with which operators need to directly contact the equipment.

[0058] A method for using a n-hexane purification and recovery system for the grain and oil industry comprises the following steps: S1. System component configuration: each filter chamber 671 is filled with a proper amount of paraffin oil, and each filter chamber 671 is placed in an independent recovery chamber 65; S2, filter start, introduce the waste gas containing n-hexane from the production line into the system, ensure that the waste gas evenly passes through each filter bin 671 filled with paraffin oil, the paraffin oil will absorb the n-hexane in the waste gas, when the waste gas passes through the paraffin oil, the n-hexane is absorbed, and the purified gas enters the recovery bin 65; S3, monitoring and weight detection, using sensors to monitor the weight of paraffin oil in each filter chamber 671. Once the weight of the paraffin oil increases to a preset threshold, it is considered that the adsorption is saturated. The weight data is fed back to the central control system for analyzing the adsorption efficiency of the paraffin oil and determining the replacement time. S4, automatically switching the filter chamber 671. When the paraffin oil adsorption of a filter chamber 671 reaches the saturation point, the control system automatically triggers the switching component 63. Under the action of the switching component 63, the saturated filter chamber 671 will be moved out of the working position, and a new filter chamber 671 will be moved into the working position to continue the filtering operation. S5. Paraffin oil is regenerated or replaced. The saturated paraffin oil is pumped from the recovery tank to the desorption device through the power component, and the desorption device separates the saturated paraffin oil.

[0059] It should be noted that the paraffin oil separated from the desorption device can be recycled indefinitely and can be directly added to the recovery device.

[0060] In summary, in the embodiment of the present application, the n-hexane purification and recovery system for the grain and oil industry and its use method, when the paraffin oil adsorption of a certain filter chamber 671 reaches the saturation point, the control system automatically triggers the switching component 63. Under the action of the switching component 63, the saturated filter chamber 671 will be moved out of the working position, and a new filter chamber 671 will be moved into the working position to continue the filtering operation, thereby avoiding the need to stop the operation of the entire system when replacing the saturated paraffin oil.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A n-hexane purification and recovery system for the grain and oil industry, comprising a recovery device and a desorption device, wherein the desorption device is connected to the recovery device; It is characterized in that The recovery device contains paraffin oil; The recovery device comprises an operating table (1), a supporting table (5) and an n-hexane recovery switching mechanism (6); the outer walls of the operating table (1) and the supporting table (5) are respectively fixedly connected with a first support head (2) and a second support head (4) in a circular array; a support rod (3) is provided between the first support head (2) and the second support head (4), and the first support head (2) and the second support head (4) are connected via the support rod (3); the n-hexane recovery switching mechanism (6) comprises an air intake pipe (61), a connecting hose (62), a switching component (63), a connecting component (64), a recovery bin (65), a supporting component (66), a recovery component (67) and a monitoring component (68), wherein: The air intake pipe (61) is fixedly connected to the outer wall of the supporting platform (5); The switching assembly (63) is mounted on the top of the operating table (1), the connecting assembly (64) is mounted on the switching assembly (63), and the connecting hose (62) is provided between the connecting assembly (64) and the air intake pipe (61), and the two are connected via the connecting hose (62); A plurality of the recovery bins (65) are fixedly connected to the top of the support platform (5) in a circumferential array, and the recovery bins (65) are connected to the desorption device via a power assembly; The supporting component (66) is mounted on the inner wall of the recovery bin (65), the recovery component (67) is mounted on the supporting component (66), and the monitoring component (68) is arranged between the supporting component (66) and the recovery component (67), and the two components are connected via the monitoring component (68).

2. The n-hexane purification and recovery system for grain and oil industry according to claim 1, characterized in that: The switching assembly (63) comprises a mounting seat (631), a drive motor (632), a support arm (633) and a support seat (634), wherein: The mounting seat (631) is mounted on the top of the operating table (1) by means of fastening bolts (6311), and the driving motor (632) is mounted on the top of the mounting seat (631); The support arm (633) is provided between the support seat (634) and the output end of the drive motor (632), and they are connected via the support arm (633).

3. The n-hexane purification and recovery system for grain and oil industry according to claim 2, characterized in that: The connection assembly (64) comprises a cylinder (641), a driving rod (642), a snap-fit ​​cap (643) and a snap-fit ​​nozzle (644), wherein: The cylinder (641) is installed at the bottom of the support seat (634), and the output end of the cylinder (641) passes through the bottom of the support seat (634) and is fixedly connected to one end of the driving rod (642); The snap-on cap (643) is fixedly connected to the other end of the driving rod (642), and the snap-on mouth (644) is fixedly connected to the bottom of the supporting platform (5).

4. The n-hexane purification and recovery system for grain and oil industry according to claim 1, characterized in that: The supporting assembly (66) comprises a supporting sleeve (661), a mounting groove (662), a supporting spring (663), a connecting arm (664) and a supporting block (665), wherein: The support sleeve (661) is fixedly connected to the inner wall of the recovery bin (65), and the mounting groove (662) is provided on the inner wall of the support sleeve (661); A plurality of the support springs (663) are fixedly connected to the inner wall of the installation groove (662) in a circumferential array, and the recovery component (67) is clamped to the inner wall of the installation groove (662) via the support springs (663); One end of the plurality of connecting arms (664) is fixedly connected to the bottom of the supporting sleeve (661) in a circular array, and the supporting block (665) is fixedly connected to the other end of the connecting arm (664).

5. The n-hexane purification and recovery system for grain and oil industry according to claim 4, characterized in that: The recovery component (67) comprises a filter chamber (671) and a connecting pipe (672), wherein: The bottom of the filter bin (671) is clamped in the mounting groove (662) via the support spring (663), and an air inlet hole is provided at the bottom of the filter bin (671); The connecting pipe (672) is provided between the top of the filtering bin (671) and the inner top of the recovery bin (65), and they are connected via the connecting pipe (672); and a solenoid valve (611) is installed on the outer wall of the air intake pipe (61).

6. The n-hexane purification and recovery system for grain and oil industry according to claim 5, characterized in that: The monitoring component (68) includes a resistance block (681), a pressure sensor (682) and a controller (683), wherein: The abutment block (681) is fixedly connected to the bottom of the filter bin (671), the pressure sensor (682) is embedded in the top of the support block (665), and the abutment block (681) abuts against the pressure sensor (682); The controller (683) is installed on the top of the supporting platform (5).

7. The n-hexane purification and recovery system for grain and oil industry according to claim 1, characterized in that: A discharge pipe (651) is installed on the top of the recovery bin (65), and the discharge pipe (651) is connected to the desorption device via a power assembly. An inspection door (652) is installed on the outer wall of the recovery bin (65).

8. The n-hexane purification and recovery system for grain and oil industry according to claim 6, characterized in that: The pressure sensor (682) is electrically connected to the controller (683), and the controller (683) is electrically connected to an external power source.

9. A method for using the n-hexane purification and recovery system for grain and oil industry according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Configuration of system components: each filter chamber (671) is filled with an appropriate amount of paraffin oil, and each filter chamber (671) is placed in an independent recovery chamber (65); S2, filter start, introduce the waste gas containing n-hexane from the production line into the system, ensure that the waste gas passes through each filter chamber (671) filled with paraffin oil evenly, the paraffin oil will absorb the n-hexane in the waste gas, and the n-hexane is absorbed when the waste gas passes through the paraffin oil, and the purified gas enters the recovery chamber (65); S3, monitoring and weight detection, using sensors to monitor the weight of the paraffin oil in each of the filter chambers (671), once the weight of the paraffin oil increases to a preset threshold, it is considered that the adsorption is saturated, and the weight data is fed back to the central control system for analyzing the adsorption efficiency of the paraffin oil and determining the replacement time; S4, automatically switching the filter bins (671), when the paraffin oil adsorption of a certain filter bin (671) reaches a saturation point, the control system automatically triggers the switching component (63), and under the action of the switching component (63), the filter bin (671) with saturated adsorption is moved out of the working position, and a new filter bin (671) is moved into the working position to continue the filtering operation; S5. Paraffin oil is regenerated or replaced. The saturated paraffin oil is pumped from the recovery tank to the desorption device through the power component, and the desorption device separates the saturated paraffin oil.

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