Polyhydroxyalkanoate extraction and separation system

Abstract

The utility model relates to the technical field of extraction and separation equipment, and provides a polyhydroxyalkanoate extraction and separation system which comprises a storage tank, a control mainboard, a disc centrifuge, a vibration sensor and a sediment detection sensor, the storage tank is in fluid communication with the disc centrifugal machine, the vibration sensor and the sediment detection sensor are both installed on the disc centrifugal machine, and the disc centrifugal machine, the vibration sensor and the sediment detection sensor are all electrically connected with the control mainboard; the control mainboard is used for controlling the disc centrifugal machine to reduce at least one of the rotating speed and the deslagging frequency according to the vibration value of the vibration sensor, or controlling the disc centrifugal machine to switch the continuous deslagging mode to the gap forced deslagging mode according to the sediment thickness value of the sediment detection sensor. The vibration and sediment thickness of the disc centrifuge are monitored in real time, and the running state of the disc centrifuge is adjusted according to the data, so that the situation that the normal use of the disc centrifuge is affected due to blockage of the disc centrifuge caused by sediment in the extraction and separation process can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of extraction and separation equipment technology, and in particular to a polyhydroxy fatty acid ester extraction and separation system. Background Technology

[0002] Polyhydroxyalkanoates (PHAs) are a promising biodegradable polymer material widely used in plastic alternatives, medical materials, and packaging. Microbial fermentation plays a central role in their production. However, subsequent extraction and purification steps face numerous technical challenges, particularly the effective separation of PHA. When using traditional disc centrifuges for solid-liquid separation, PHA tends to form difficult-to-handle elastic lumps. This problem is particularly pronounced in crude PHA extracted after cell disruption, as these lumps are more likely to deposit inside the centrifuge, leading to blockages and severely impacting separation efficiency and production continuity. Utility Model Content

[0003] This invention provides a polyhydroxyalkanoate extraction and separation system to solve the problem of low solid-liquid separation efficiency in the existing technology using traditional disc centrifuges.

[0004] This utility model provides a polyhydroxy fatty acid ester extraction and separation system, including: a storage tank, a control main board, a disc centrifuge, a vibration sensor and a sediment detection sensor;

[0005] The storage tank is in fluid communication with the disc centrifuge, the vibration sensor and the sediment detection sensor are both installed in the disc centrifuge, and the disc centrifuge, the vibration sensor and the sediment detection sensor are all electrically connected to the control motherboard;

[0006] The control board is used to control the disc centrifuge to reduce at least one of its rotation speed and slag discharge frequency based on the vibration value of the vibration sensor, or to control the disc centrifuge to switch from continuous slag discharge mode to intermittent strong discharge mode based on the sediment thickness value of the sediment detection sensor.

[0007] According to the present invention, a polyhydroxy fatty acid ester extraction and separation system is provided, wherein the control motherboard includes a processor and a first comparison circuit;

[0008] The vibration sensor is used to send the detected vibration value to the first comparison circuit. The first comparison circuit is used to compare the received vibration value with the target vibration value to obtain a first comparison result. The processor is used to control the disc centrifuge to reduce at least one of the rotational speed and the slag discharge frequency according to the first comparison result.

[0009] According to the polyhydroxyalkanoate extraction and separation system provided by this utility model, the first comparison circuit is further configured to output a first signal when the first comparison result is greater than a preset threshold, and the processor is configured to control the disc centrifuge to reduce the rotation speed and the slag discharge frequency according to the first signal; and to output a second signal when the first comparison result is less than the preset threshold, and the processor is configured to control the disc centrifuge to reduce the rotation speed or the slag discharge frequency according to the second signal.

[0010] According to the polyhydroxyalkanoate extraction and separation system provided by this utility model, the control motherboard further includes a second comparison circuit. The sediment detection sensor is used to send the detected sediment thickness value to the second comparison circuit. The second comparison circuit is used to compare the received sediment thickness value with the target sediment thickness value, and output a high level to the processor when the received sediment thickness value is greater than or equal to the target sediment thickness value.

[0011] According to the present invention, a polyhydroxyalkanoate extraction and separation system is provided, which further includes a level gauge, a first valve body, and a cleaning fluid delivery pipeline. The level gauge is installed in the storage tank, the cleaning fluid delivery pipeline is in fluid communication with the disc centrifuge, the first valve body is installed in the cleaning fluid delivery pipeline, and both the level gauge and the first valve body are electrically connected to the control main board. The control main board is also used to control the action of the first valve body according to the level value of the level gauge.

[0012] According to the present invention, a polyhydroxy fatty acid ester extraction and separation system is provided, wherein the control motherboard includes a processor and a third comparison circuit;

[0013] The level gauge is used to send the detected level value to the third comparison circuit. The third comparison circuit is used to compare the received level value with the target level value, and output a high level to the processor when the received level value is less than or equal to the target level value.

[0014] According to the present invention, a polyhydroxyalkanoate extraction and separation system is provided, the polyhydroxyalkanoate extraction and separation system further includes a second valve body and a steam delivery pipeline. The steam delivery pipeline is in fluid communication with the disc centrifuge. The second valve body is installed on the steam delivery pipeline and is electrically connected to the control main board. The control main board is also used to open the second valve body after controlling the first valve body to close.

[0015] According to the present invention, a polyhydroxyalkanoate extraction and separation system is provided, wherein a pneumatic three-way ball valve is also installed on the cleaning liquid delivery pipeline, the steam delivery pipeline is connected to the pneumatic three-way ball valve, and the control main board is also used to control the pneumatic three-way ball valve to operate after controlling the first valve body to close, so that the steam delivery pipeline is in fluid communication with the disc centrifuge through the cleaning liquid delivery pipeline, and the second valve body is opened.

[0016] According to the present invention, a polyhydroxyalkanoate extraction and separation system is provided, wherein the storage tank is fluidly connected to the disc centrifuge via a material conveying pipeline, and the polyhydroxyalkanoate extraction and separation system further includes a pump body and a solid content detector. The pump body is installed in the material conveying pipeline, and the solid content detector is installed in the storage tank. Both the pump body and the solid content detector are electrically connected to the control main board, which is used to control the pumping flow rate of the pump body according to the solid content.

[0017] According to the present invention, a polyhydroxy fatty acid ester extraction and separation system is provided, wherein the control motherboard includes a processor and a fourth comparison circuit;

[0018] The solid content detector is used to send the detected solid content to the fourth comparison circuit. The fourth comparison circuit is used to compare the received solid content with the target solid content to obtain a second comparison result. The processor is used to control the pump body to adjust the pumping flow rate according to the second comparison result.

[0019] The polyhydroxyalkanoate extraction and separation system provided by this invention monitors the vibration and sediment thickness of the disc centrifuge in real time and adjusts the operating status of the disc centrifuge based on this data to ensure stable operation and efficient separation. This avoids sediment buildup during the extraction and separation process that could clog the disc centrifuge and affect its normal use. As a result, the system can improve the efficiency of polyhydroxyalkanoate extraction and separation to a certain extent, and enhance the continuity and stability of the polyhydroxyalkanoate extraction and separation system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the polyhydroxy fatty acid ester extraction and separation system provided by this utility model.

[0022] Figure label:

[0023] 1. Storage tank; 2. Pump body; 3. Control main board; 4. Disc centrifuge; 5. Solid content analyzer; 6. Vibration sensor; 7. Sediment detection sensor; 8. Level gauge; 9. Cleaning fluid delivery pipeline; 91. First valve body; 92. Pneumatic three-way ball valve; 10. Water tank; 11. Steam delivery pipeline; 111. Second valve body; 12. High-temperature steam tank; 13. Material delivery pipeline. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] The following is combined Figure 1 This invention describes a polyhydroxy fatty acid ester extraction and separation system.

[0026] like Figure 1 As shown, the polyhydroxyalkanoate extraction and separation system of this utility model embodiment includes: a storage tank 1, a control main board 3, a disc centrifuge 4, a vibration sensor 6, and a sediment detection sensor 7.

[0027] The storage tank 1 is in fluid communication with the disc centrifuge 4. For example, the outlet of the storage tank 1 is in fluid communication with the inlet of the disc centrifuge 4 through the material conveying pipeline 13. In addition, the disc centrifuge 4 also has a liquid outlet and a slag outlet. The vibration sensor 6 and the sediment detection sensor 7 are both installed in the disc centrifuge 4. The disc centrifuge 4, the vibration sensor 6, and the sediment detection sensor 7 are all electrically connected to the control main board 3. The control main board 3 is used to control the disc centrifuge 4 to reduce at least one of the rotation speed and slag discharge frequency according to the vibration value of the vibration sensor 6, or to control the disc centrifuge 4 to switch from continuous slag discharge mode to intermittent strong discharge mode according to the sediment thickness value of the sediment detection sensor 7.

[0028] Among them, the sediment detection sensor 7 can be an ultrasonic sensor. The principle of ultrasonic sensor to measure sediment thickness is that when the ultrasonic pulse emitted by the probe passes through the object being measured (such as sediment) and reaches the material interface, the pulse is reflected back to the probe. By accurately measuring the time required for the ultrasonic pulse to travel from emission to reception, and based on the propagation speed of ultrasonic waves in the material, the ultrasonic sensor can calculate the thickness of the material being measured.

[0029] Specifically, the disc centrifuge 4 is used for centrifugal separation of materials. A vibration sensor 6 is installed on the disc centrifuge 4 to detect the centrifuge's vibration. A sediment detection sensor 7 is also installed on the disc centrifuge 4 to detect the thickness of the sediment. The control mainboard 3 is electrically connected to the disc centrifuge 4, the vibration sensor 6, and the sediment detection sensor 7, and is used to receive various data and control the operation of the disc centrifuge 4.

[0030] For example, when the vibration value detected by vibration sensor 6 exceeds the threshold, the control board 3 will determine that the disc centrifuge 4 may be experiencing abnormal vibration. At this time, the control board 3 will take measures, such as reducing the rotational speed or slag discharge frequency of the disc centrifuge 4, or simultaneously reducing both the rotational speed and slag discharge frequency, to reduce vibration and protect the equipment. When the sediment thickness detected by sediment detection sensor 7 reaches or exceeds the threshold, the control board 3 will determine that the sediment inside the disc centrifuge 4 has accumulated to a certain extent. At this time, the control board 3 will switch the slag discharge mode of the disc centrifuge 4 from continuous slag discharge mode to intermittent strong discharge mode to more effectively remove sediment. The default operating mode of the disc centrifuge 4 is continuous slag discharge mode.

[0031] In practical applications, by monitoring the vibration and sediment thickness of the disc centrifuge 4 in real time and adjusting its operating status based on this data, the stable operation and efficient separation of the disc centrifuge 4 can be ensured. This avoids the disc centrifuge 4 from being clogged by sediment during the extraction and separation process, which would affect its normal use. In this way, the efficiency of polyhydroxyalkanoate extraction and separation can be improved to a certain extent, and the continuity and stability of the polyhydroxyalkanoate extraction and separation system can be enhanced.

[0032] In an optional embodiment, the control motherboard 3 includes a processor and a first comparison circuit; the vibration sensor 6 is used to send the detected vibration value to the first comparison circuit, the first comparison circuit is used to compare the received vibration value with the target vibration value to obtain a first comparison result, and the processor is used to control the disc centrifuge 4 to reduce at least one of the rotation speed and slag discharge frequency according to the first comparison result.

[0033] It should be noted that the vibration sensor 6 detects the vibration value of the disc centrifuge 4 and sends the vibration value to the first comparison circuit. The first comparison circuit compares the vibration value with a preset target vibration value to obtain a first comparison result. The first comparison result indicates that the vibration value is greater than the target vibration value. Based on the first comparison result, the processor determines whether the disc centrifuge 4 needs to reduce its speed or slag discharge frequency, or simultaneously reduce both the speed and slag discharge frequency. This effectively reduces vibration, prevents equipment damage or accidents, and maintains stable operation.

[0034] In practical applications, the intelligent control of the disc centrifuge 4 is achieved through the coordinated work of the vibration sensor 6, the first comparison circuit and the processor. It can monitor and control the working status of the disc centrifuge 4 in real time, ensuring that it can operate under safe and stable conditions.

[0035] In an optional embodiment, the first comparison circuit is further configured to output a first signal when the first comparison result is greater than a preset threshold, and the processor is configured to control the disc centrifuge 4 to reduce its rotation speed and slag discharge frequency according to the first signal; and to output a second signal when the first comparison result is less than the preset threshold, and the processor is configured to control the disc centrifuge 4 to reduce its rotation speed or slag discharge frequency according to the second signal.

[0036] Specifically, vibration sensor 6 is used to monitor the vibration of disc centrifuge 4 in real time and sends the detected vibration value to the first comparison circuit. The first comparison circuit receives the vibration value from vibration sensor 6 and compares it with a preset target vibration value. If the vibration value is greater than the target vibration value, the first comparison circuit generates a first comparison result (also called a "vibration exceeding the standard result"). The first comparison circuit compares the vibration exceeding the standard result with a preset threshold. If the vibration exceeding the standard result is greater than the preset threshold (meaning that the vibration not only exceeds the standard but is also severely exceeding the standard), the first comparison circuit outputs a first signal. If the vibration exceeding the standard result is less than or equal to the preset threshold (meaning that the vibration exceeds the standard, but is only slightly exceeding the standard), the first comparison circuit outputs a second signal.

[0037] Next, the processor controls the operating state of the disc centrifuge 4 based on the received signal (first signal or second signal). If the first signal is received, the processor controls the disc centrifuge 4 to simultaneously reduce its rotational speed and slag discharge frequency to quickly reduce vibration and protect the equipment. If the second signal is received, the processor selects either reducing the rotational speed or the slag discharge frequency, depending on the specific situation, to optimize the operation of the disc centrifuge 4 and reduce vibration.

[0038] In an optional embodiment, the control motherboard 3 further includes a second comparison circuit. The sediment detection sensor 7 is used to send the detected sediment thickness value to the second comparison circuit. The second comparison circuit is used to compare the received sediment thickness value with the target sediment thickness value, and output a high level to the processor when the received sediment thickness value is greater than or equal to the target sediment thickness value.

[0039] Specifically, the sediment detection sensor 7 is used to monitor the thickness of sediment inside the disc centrifuge 4 in real time and sends the detected sediment thickness value to the second comparison circuit. The second comparison circuit receives the sediment thickness value from the sediment detection sensor 7 and compares it with a preset target sediment thickness value. If the received sediment thickness value is greater than or equal to the target sediment thickness value, the second comparison circuit outputs a high-level signal to the processor. Upon receiving the high-level signal from the second comparison circuit, the processor switches the slag discharge mode of the disc centrifuge 4 from continuous slag discharge mode to intermittent strong discharge mode to remove or reduce sediment inside the disc centrifuge 4 in a short time.

[0040] In optional embodiments, such as Figure 1 As shown, the polyhydroxyalkanoate extraction and separation system also includes a level gauge 8, a first valve body 91, and a cleaning fluid delivery pipeline 9. The level gauge 8 is installed in the storage tank 1, the cleaning fluid delivery pipeline 9 is in fluid communication with the disc centrifuge 4, and the first valve body 91 is installed in the cleaning fluid delivery pipeline 9. Both the level gauge 8 and the first valve body 91 are electrically connected to the control main board 3. The control main board 3 is also used to control the action of the first valve body 91 according to the level value of the level gauge 8.

[0041] The first valve body 91 can be a solenoid valve, and the cleaning fluid delivery line 9 is used to supply cleaning fluid. For example, the cleaning fluid delivery line 9 is in fluid communication with the water tank 10 storing cleaning fluid.

[0042] It should be noted that after the material processing in storage tank 1 is completed, the liquid level value of level gauge 8 will be lower than the target liquid level value. At this time, the control main board 3 controls the first valve body 91 to open, and the cleaning fluid in water tank 10 can enter the cavity of disc centrifuge 4 through cleaning fluid delivery pipeline 9 to complete the cleaning of disc centrifuge 4. For example, the cleaning fluid delivery pipeline 9 can be connected to the drain port of disc centrifuge 4.

[0043] Understandably, the cleaning fluid in the water tank 10 enters the cavity of the disc centrifuge 4 through the cleaning fluid delivery pipe 9, which can discharge the internal deposits and residues, prevent scale buildup or blockage of the disc centrifuge 4 due to long-term use, and ensure that the disc centrifuge 4 operates stably for a long time.

[0044] In practical applications, the control motherboard 3 also includes a third comparison circuit. The level gauge 8 is used to send the detected level value to the third comparison circuit. The third comparison circuit is used to compare the received level value with the target level value, and output a high level to the processor when the received level value is less than or equal to the target level value.

[0045] It should be noted that the level gauge 8 is used to monitor the liquid level in the storage tank 1 in real time and sends the detected liquid level value to the third comparison circuit. The third comparison circuit receives the liquid level value from the level gauge 8 and compares it with a preset target liquid level value. If the received liquid level value is less than or equal to the target liquid level value, the third comparison circuit outputs a high-level signal to the processor. Based on the received high-level signal, the processor controls the first valve body 91 to open.

[0046] In optional embodiments, such as Figure 1 As shown, the polyhydroxyalkanoate extraction and separation system also includes a second valve body 111 and a steam delivery pipeline 11. The steam delivery pipeline 11 is in fluid communication with the disc centrifuge 4. The second valve body 111 is installed on the steam delivery pipeline 11 and is electrically connected to the control main board 3. The control main board 3 is also used to open the second valve body 111 after the first valve body 91 is closed.

[0047] The steam delivery pipeline 11 is connected to a high-temperature steam tank 12, which is used to provide high-temperature steam. The second valve body 111 can be a solenoid valve.

[0048] It should be noted that after the material processing in storage tank 1 is completed, the liquid level value of level gauge 8 will be lower than the target liquid level value. At this time, the processor controls the first valve body 91 to open, and the cleaning fluid in water tank 10 can enter the cavity of disc centrifuge 4 through cleaning fluid delivery pipeline 9 to complete the cleaning of disc centrifuge 4. After the disc centrifuge 4 is cleaned, the processor controls the second valve body 111 to open, and the high-temperature steam in high-temperature steam tank 12 enters the cavity of disc centrifuge 4 through steam delivery pipeline 11 to complete the drying and disinfection of disc centrifuge 4.

[0049] In an optional embodiment, a pneumatic three-way ball valve 92 is also installed on the cleaning fluid delivery pipeline 9. The steam delivery pipeline 11 is connected to the pneumatic three-way ball valve 92. The control main board 3 is also used to control the pneumatic three-way ball valve 92 to operate after the first valve body 91 is closed, so that the steam delivery pipeline 11 is in fluid communication with the disc centrifuge 4 through the cleaning fluid delivery pipeline 9, and the second valve body 111 is opened.

[0050] Specifically, the pneumatic three-way ball valve 92 includes a first inlet end, a second inlet end, and an outlet end. The cleaning fluid delivery pipeline 9 includes a first part and a second part. The first inlet end is connected to the first part, the second inlet end is connected to the steam delivery pipeline 11, and the outlet end is connected to the disc centrifuge 4 through the second part. Under the control of the processor, the first part and the second part are selectively connected, and the steam delivery pipeline 11 is selectively connected to the second part.

[0051] In optional embodiments, such as Figure 1As shown, the storage tank 1 is fluidly connected to the disc centrifuge 4 through the material conveying pipeline 13. The polyhydroxyalkanoate extraction and separation system also includes a pump body 2 and a solid content detector 5. The pump body 2 is installed on the material conveying pipeline 13, and the solid content detector 5 is installed on the storage tank 1. Both the pump body 2 and the solid content detector 5 are electrically connected to the control main board 3. The control main board 3 is used to control the pumping flow rate of the pump body 2 according to the solid content.

[0052] The solid content analyzer 5 is installed on the storage tank 1 to monitor the solid content in the material in real time. The solid content analyzer 5 can be a spectrophotometer. The working principle of a spectrophotometer is based on the absorption or transmission of light of a specific wavelength by a substance to analyze its composition and content. When photons collide with molecules in a solution, absorption occurs, and the absorption of light by a substance is selective. By measuring this absorption phenomenon, i.e., the absorbance value, the amount of a certain substance present can be reflected.

[0053] In practical applications, based on the real-time data provided by the solid content analyzer 5, the processor can automatically adjust the pumping flow rate of the pump body 2 to ensure that the material enters the disc centrifuge 4 at the optimal flow rate.

[0054] In an optional embodiment, the control motherboard 3 further includes a fourth comparison circuit. The solid content detector 5 is used to send the detected solid content to the fourth comparison circuit. The fourth comparison circuit is used to compare the received solid content with the target solid content to obtain a second comparison result. The processor is used to control the pump body 2 to adjust the pumping flow rate according to the second comparison result.

[0055] Specifically, the solid content detector 5 sends the detected solid content value to the fourth comparison circuit. The fourth comparison circuit receives the solid content value from the solid content detector 5 and compares it with a preset target solid content value. The processor controls the pumping flow rate of the pump body 2 based on the second comparison result output by the fourth comparison circuit.

[0056] In practical applications, the processor presets numerical ranges of different sizes, and each range has a corresponding pumping flow rate. When the solid content detector 5 sends the detected solid content value to the fourth comparison circuit, the fourth comparison circuit compares the received solid content value with the preset target solid content value. The processor determines which numerical range the current solid content value falls into based on the second comparison result output by the fourth comparison circuit. Once the numerical range of the solid content value is determined, the pumping flow rate corresponding to that range can be selected. The processor sends a corresponding control command to the pump body 2, instructing the pump body 2 to adjust its pumping flow rate to the corresponding value.

[0057] In this way, the pumping flow rate of the pump body 2 can be automatically and accurately adjusted according to the real-time changes in the solid content of the material, thereby ensuring that the disc centrifuge 4 can perform separation operations in the best working condition, improving separation efficiency and product quality.

[0058] In practical applications, the extraction and separation of polyhydroxy fatty acid esters generally includes the following three stages.

[0059] Stage 1: Preliminary separation of the fermentation broth. In this process, the microbial cells are separated from impurities in the fermentation broth, resulting in a concentrated liquid rich in microbial cells. This stage employs a continuous slag discharge mode. The vibration status of the disc centrifuge 4 can be monitored in real time by the vibration sensor 6, thereby adjusting the rotation speed and / or slag discharge frequency to ensure efficient solid-liquid separation. The goal of this stage is to maximize the separation of microbial cells from impurities while minimizing microbial cell loss.

[0060] The second stage: separation of crude PHA. In this process, crude PHA is separated from other biomass (such as cell debris). This stage employs a continuous slag discharge mode. Because crude PHA easily deposits and forms elastic lumps at this stage, causing blockage of the disc centrifuge 4, ultrasonic sensors can be used to monitor the thickness and deposition trend of the sediment in real time. When excessive sediment thickness is detected, intermittent forced slag discharge is triggered to promptly remove the sediment, ensuring continuous operation without clogging.

[0061] The second stage: purification and separation of PHA particles. In this process, the crude PHA product, after enzymatic hydrolysis, is sent to a centrifuge for the separation of high-purity PHA particles. This stage adopts a continuous slag discharge mode. Vibration sensor 6 is used to monitor the operation of disc centrifuge 4, thereby adjusting the speed and / or slag discharge frequency to ensure the smooth completion of the PHA particle purification process and avoid clogging problems caused by material accumulation.

[0062] The polyhydroxyalkanoate (PHA) extraction and separation system of this embodiment effectively prevents equipment blockage caused by crude PHA deposition by controlling the main board 3 in conjunction with multiple sensors, ensuring continuous and efficient operation of the equipment. Secondly, by adjusting the rotation speed, slag discharge frequency, and slag discharge mode, efficient separation of fermentation broth, crude product, and high-purity PHA particles is achieved during the PHA extraction process. In particular, real-time monitoring of the sediment status effectively solves the equipment blockage problem in the crude product separation stage. Furthermore, it enables intelligent and automated operation, significantly improving production efficiency and product quality. Finally, its automatic cleaning function reduces equipment maintenance needs, ensuring long-term stable operation and making it suitable for long-term, high-intensity production.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A polyhydroxyalkanoate extraction and separation system, characterized in that, include: Storage tank, control board, disc centrifuge, vibration sensor and sediment detection sensor; The storage tank is in fluid communication with the disc centrifuge, the vibration sensor and the sediment detection sensor are both installed in the disc centrifuge, and the disc centrifuge, the vibration sensor and the sediment detection sensor are all electrically connected to the control motherboard; The control board is used to control the disc centrifuge to reduce at least one of its rotation speed and slag discharge frequency based on the vibration value of the vibration sensor, or to control the disc centrifuge to switch from continuous slag discharge mode to intermittent strong discharge mode based on the sediment thickness value of the sediment detection sensor.

2. The polyhydroxyalkanoate extraction and separation system according to claim 1, characterized in that, The control motherboard includes a processor and a first comparison circuit; The vibration sensor is used to send the detected vibration value to the first comparison circuit. The first comparison circuit is used to compare the received vibration value with the target vibration value to obtain a first comparison result. The processor is used to control the disc centrifuge to reduce at least one of the rotational speed and the slag discharge frequency according to the first comparison result.

3. The polyhydroxyalkanoate extraction and separation system according to claim 2, characterized in that, The first comparison circuit is further configured to output a first signal when the first comparison result is greater than a preset threshold, and the processor is configured to control the disc centrifuge to reduce the rotation speed and the slag discharge frequency according to the first signal; and to output a second signal when the first comparison result is less than the preset threshold, and the processor is configured to control the disc centrifuge to reduce the rotation speed or the slag discharge frequency according to the second signal.

4. The polyhydroxyalkanoate extraction and separation system according to claim 2, characterized in that, The control motherboard also includes a second comparison circuit. The sediment detection sensor is used to send the detected sediment thickness value to the second comparison circuit. The second comparison circuit is used to compare the received sediment thickness value with the target sediment thickness value, and output a high level to the processor when the received sediment thickness value is greater than or equal to the target sediment thickness value.

5. The polyhydroxyalkanoate extraction and separation system according to claim 1, characterized in that, The polyhydroxyalkanoate extraction and separation system further includes a level gauge, a first valve body, and a cleaning fluid delivery pipeline. The level gauge is installed in the storage tank, the cleaning fluid delivery pipeline is in fluid communication with the disc centrifuge, the first valve body is installed in the cleaning fluid delivery pipeline, and both the level gauge and the first valve body are electrically connected to the control main board. The control main board is also used to control the action of the first valve body according to the level value of the level gauge.

6. The polyhydroxyalkanoate extraction and separation system according to claim 5, characterized in that, The control board includes a processor and a third comparator circuit; The level gauge is used to send the detected level value to the third comparison circuit. The third comparison circuit is used to compare the received level value with the target level value, and output a high level to the processor when the received level value is less than or equal to the target level value.

7. The polyhydroxy fatty acid ester extraction and separation system according to claim 5, characterized in that, The polyhydroxyalkanoate extraction and separation system further includes a second valve body and a steam delivery pipeline. The steam delivery pipeline is in fluid communication with the disc centrifuge. The second valve body is installed on the steam delivery pipeline and is electrically connected to the control main board. The control main board is also used to open the second valve body after controlling the first valve body to close.

8. The polyhydroxyalkanoate extraction and separation system according to claim 7, characterized in that, A pneumatic three-way ball valve is also installed on the cleaning fluid delivery pipeline. The steam delivery pipeline is connected to the pneumatic three-way ball valve. The control board is also used to control the pneumatic three-way ball valve to operate after the first valve body is closed, so that the steam delivery pipeline is in fluid communication with the disc centrifuge through the cleaning fluid delivery pipeline, and the second valve body is opened.

9. The polyhydroxyalkanoate extraction and separation system according to claim 1, characterized in that, The storage tank is in fluid communication with the disc centrifuge via a material conveying pipeline. The polyhydroxyalkanoate extraction and separation system also includes a pump body and a solid content detector. The pump body is installed in the material conveying pipeline, and the solid content detector is installed in the storage tank. Both the pump body and the solid content detector are electrically connected to the control main board. The control main board is used to control the pumping flow rate of the pump body according to the solid content.

10. The polyhydroxyalkanoate extraction and separation system according to claim 9, characterized in that, The control board includes a processor and a fourth comparator circuit; The solid content detector is used to send the detected solid content to the fourth comparison circuit. The fourth comparison circuit is used to compare the received solid content with the target solid content to obtain a second comparison result. The processor is used to control the pump body to adjust the pumping flow rate according to the second comparison result.

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