Automatic pour point depressant adding device in biodiesel storage and transportation
By designing an automatic addition device in biodiesel storage and transportation, and adopting automated precision addition and electric stirring technology, the problems of poor fluidity of biodiesel at low temperatures and uneven addition of coagulant reducers are solved, and efficient and uniform mixing effect is achieved, reducing operation difficulty and ensuring product quality.
Patent Information
- Application Number
- CN202420944883.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-06
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-05-06
AI Technical Summary
Biodiesel is prone to crystallization and solidification at low temperatures, resulting in poor fluidity. In the prior art, the addition of coagulation reducing agent is unevenly, which increases the difficulty of operation and labor intensity.
An automatic deflation deflation agent addition device was designed during biodiesel storage and transportation, using automated precise addition metering technology and electric stirrer, combined with an automatic flow control system to ensure that the deflation deflation agent is evenly mixed with biodiesel.
The uniform mixing of deflator and biodiesel is achieved, which reduces the labor intensity of operators and ensures the stability of product quality, meeting or exceeding EU standards.
Smart Images
Figure CN222989781U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of auxiliary equipment for the storage and transportation of biodiesel, in particular to an automatic adding device for pour point depressants in the storage and transportation of biodiesel, and specifically to a device for automatically adding pour point depressants into the tank of a biodiesel outbound tanker during the storage and transportation of biodiesel. Background Art
[0002] Biodiesel is mainly fatty acid methyl ester generated by the reaction of waste animal and vegetable oils and fats with methanol. It has been found that, similar to petrochemical diesel, biodiesel will also crystallize and solidify at low temperatures, making it unable to be used normally under low temperature conditions. The flow performance of biodiesel at low temperatures is not only related to whether the fuel supply system of a diesel engine can supply fuel normally at low temperatures, but also closely related to whether operations such as the transportation, storage, and loading and unloading of biodiesel can be carried out normally. After adding a pour point depressant to biodiesel, the cold filter plugging point of biodiesel can be reduced from the original 6°C to below 0°C, enabling it to maintain good fluidity at 0°C or lower temperatures, ensuring its quality and performance as a biofuel, and the product can meet or exceed EU standards. Currently, during the operation of outbound loading of biodiesel, the pour point depressant mother liquor and biodiesel are generally diluted in a certain amount in a transition tank and circulated evenly by a pump, and then pumped into a metering tank. While the biodiesel is being unloaded, the diluted pour point depressant in the metering tank is opened to be mixed evenly. Finally, after unloading at the dock, complete mixing can be achieved. The existing defects are as follows: First, due to the high viscosity of the pour point depressant mother liquor and its density being greater than that of biodiesel, when the pour point depressant is added to the transition tank, it is easy to sink to the bottom of the transition tank, and the pump circulation time is long and it is difficult to achieve a uniform effect; second, during loading, workers need to observe the liquid level in the metering tank at any time and adjust the valve of the diluted pour point depressant, which increases the labor intensity of the operator and the error in the amount of pour point depressant added is large. Summary of the Invention
[0003] The purpose of the utility model is to provide an automatic adding device for pour point depressants in the storage and transportation of biodiesel, which can mix the pour point depressant and biodiesel evenly, has low labor intensity, is convenient and efficient to operate, and is safe and reliable to use.
[0004] To achieve the above object, the automatic pour point depressant adding device in the storage and transportation of biodiesel of the present utility model includes a biodiesel loading pump 1, a pour point depressant preparation tank 3, barreled pour point depressant 4, a stirrer 5, a flow automatic control system 6, a metering pump 7, a pump moving suction pipe 8, a transport tank truck 10 and connecting pipes; the flow automatic control system 6 includes a flow regulating frequency converter FB, a No. 1 digital display flowmeter 2 with a flow sensor, a No. 2 digital display flowmeter 9 with a flow sensor, a program control system PLC, a computer and an electric control cabinet, and there are signal line connections between the PLC and the flow regulating frequency converter FB, the No. 1 digital display flowmeter 2, the No. 2 digital display flowmeter 9 and the computer; the top of the pour point depressant preparation tank 3 is provided with a biodiesel inlet a and a pour point depressant circulation inlet d, the upper part of the side is provided with a liquid level gauge upper outlet b, the lower part of the side is provided with a liquid level gauge lower inlet c for installing a magnetic flap liquid level gauge, and the other side of the lower part is provided with a pour point depressant outlet e, the pour point depressant outlet e and the pour point depressant circulation inlet d are arranged in a symmetric direction, and an electric mechanical stirrer 5 is arranged in the pour point depressant preparation tank 3, and the electric mechanical stirrer 5 is installed at the upper center of the pour point depressant preparation tank 3; the top of the barreled pour point depressant 4 is provided with a pour point depressant screw cap inlet and outlet f; the top of the transport tank truck 10 is provided with a material inlet g; the biodiesel loading pump 1 is connected to the biodiesel inlet a after connecting the No. 1 digital display flowmeter 2, and the other way is connected to the material inlet g; the pour point depressant screw cap inlet and outlet f is merged with the pipeline of the pour point depressant outlet e after connecting the pump moving suction pipe 8, and then connected to the inlet of the metering pump 7, and the outlet of the metering pump 7 is connected to the pour point depressant circulation inlet d in one way, and the other way is connected to the material inlet g after connecting the No. 2 digital display flowmeter 9.
[0005] The tail suction port end face of the pump moving suction pipe 8 is provided with square U-shaped notches evenly distributed along the periphery, and the U-shaped notches are 3 mm deep and 3 mm wide.
[0006] The computer of the above flow automatic control system is equipped with Tianhong industrial configuration software V1.0. The function of this software system is to display, record and control the data of each process point. The software development merchant is Longyan Tianhong Computer Technology Co., Ltd., and the listing time is May 2018, which belongs to the prior art; the above program control system PLC is developed by Longyan Tianhong Computer Technology Co., Ltd., the PLC brand is Siemens, the CPU and acquisition control module of the PLC system are general products of the Siemens S7-1200 series, and the PLC software programming is written by Longyan Tianhong Computer Technology Co., Ltd. according to requirements. All the software and hardware with computer programs belong to the prior art that can be purchased from the market.
[0007] The automatic pour point depressant adding device in the storage and transportation of biodiesel of the present utility model has the following technical features and beneficial effects:
[0008] 1. By adopting the automated precise dosing technology, the labor intensity of the operators is greatly reduced, and the problems in the prior art of inaccurate metering fluctuations and multiple processes when manually adding the prepared pour point depressant into the tank truck through a metering tank are solved.
[0009] 2. Adding an electric stirrer can enable the biodiesel and the pour point depressant to be mixed quickly, fully and evenly, reduce the preparation process time, and ensure reliable quality.
[0010] 3. Adding an automatic control system for the pour point depressant flow rate can ensure that the product quality meets the customer requirements and reduce the labor intensity of the operators.
[0011] 4. An end face of a suction port at the tail of a moving straw for barreled pour point depressant is provided with a U-shaped notch. When the barreled pour point depressant is pumped by a pump, the pump can suck the pour point depressant in the barrel clean, reducing product consumption and being environmentally friendly. Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of the automatic pour point depressant adding device in the biodiesel storage and transportation of the present utility model.
[0013] Figure 2 is Figure 1 an enlarged structural diagram of the pour point depressant preparation tank.
[0014] Figure 3 is Figure 1 an enlarged structural diagram of the barreled pour point depressant.
[0015] Figure 4 is Figure 1 an enlarged structural diagram of the pump moving straw.
[0016] Figure 5 is Figure 1 an enlarged structural diagram of the transport tank truck.
[0017] Figure 6 is Figure 1 an enlarged structural diagram of the automatic flow control system.
[0018] Reference numerals: Biodiesel loading pump 1, No. 1 digital display flowmeter 2, Pour point depressant preparation tank 3, Barreled pour point depressant 4, Stirrer 5, Automatic flow control system 6, Metering pump 7, Pump moving straw 8, No. 2 digital display flowmeter 9, Transport tank truck 10, Biodiesel inlet a; Upper outlet of liquid level gauge b, Lower inlet of liquid level gauge c, Pour point depressant circulation inlet d, Pour point depressant outlet e, Pour point depressant cap inlet and outlet f, Material inlet g, F - Flow, B - Frequency converter, I - Display, V - Control valve, C - Control, A - Alarm. Detailed Embodiments
[0019] The following further elaborates in detail the specific implementation manner of the automatic pour point depressant adding device in the storage and transportation of biodiesel of the present utility model in conjunction with the accompanying drawings.
[0020] Figures 1-6 As shown, the automatic pour point depressant adding device in the storage and transportation of biodiesel of the present utility model includes a biodiesel loading pump 1, a pour point depressant preparation tank 3, barreled pour point depressant 4, a stirrer 5, a flow automatic control system 6, a metering pump 7, a pump moving suction pipe 8, a transport tank truck 10 and connecting pipes; the flow automatic control system 6 includes a flow regulating frequency converter FB, a No. 1 digital display flowmeter 2 with a flow sensor, a No. 2 digital display flowmeter 9 with a flow sensor, a program control system PLC, a computer and an electric control cabinet, and there are signal lines connecting the PLC with the flow regulating frequency converter FB, the No. 1 digital display flowmeter 2, the No. 2 digital display flowmeter 9 and the computer; the top of the pour point depressant preparation tank 3 is provided with a biodiesel inlet a and a pour point depressant circulation inlet d, the upper part of the side is provided with a liquid level meter upper outlet b, the lower part of the side is provided with a liquid level meter lower inlet c for installing a magnetic flap liquid level gauge, and the other side of the lower part is provided with a pour point depressant outlet e. In order to make the pour point depressant and biodiesel mix evenly, the pour point depressant outlet e and the pour point depressant circulation inlet d are arranged in a symmetric direction. An electric mechanical stirrer 5 is arranged in the pour point depressant preparation tank 3, and the electric mechanical stirrer 5 is installed at the upper center of the pour point depressant preparation tank 3; the top of the barreled pour point depressant 4 is provided with a pour point depressant screw cap inlet and outlet f; the top of the transport tank truck 10 is provided with a material inlet g; after connecting the No. 1 digital display flowmeter 2, the biodiesel loading pump 1 is connected to the biodiesel inlet a in one way and to the material inlet g in the other way; after connecting the pump moving suction pipe 8, the pour point depressant screw cap inlet and outlet f is merged with the pipeline of the pour point depressant outlet e and then connected to the inlet of the metering pump 7. The tail suction port end face of the pump moving suction pipe 8 is provided with square U-shaped notches evenly distributed along the periphery, and the U-shaped notch is 3 mm deep and 3 mm wide; one way of the outlet of the metering pump 7 is connected to the pour point depressant circulation inlet d, and the other way is connected to the material inlet g after connecting the No. 2 digital display flowmeter 9.
[0021] The purpose of setting the magnetic flap liquid level gauge is to ensure the safety of the tank during the preparation process of the pour point depressant preparation tank 3 and prevent overfilling. In addition, the magnetic flap liquid level gauge can also be used to calibrate the accuracy of the No. 1 digital display flowmeter 2 and the No. 2 digital display flowmeter 9.
[0022] The density of the oil solution of the commonly used pour point depressant acrylate polymer is about 0.92 g / cm3 at 15°C, which is greater than the density of biodiesel at 0.87 g / cm3. Therefore, the pour point depressant is likely to sink to the bottom of the tank. In order to make the pour point depressant and biodiesel mix evenly, the pour point depressant outlet e and the pour point depressant circulation inlet d are arranged in a symmetric direction.
[0023] The outlet e of the pour point depressant is connected to the pipeline of the metering pump 7. The motor of the metering pump 7 is equipped with a flow regulating frequency converter FB. The working principle of the flow automatic control system 6 is as follows: When the customer needs to add a certain proportion of pour point depressant to the biodiesel product, set the quantity of biodiesel of the No. 1 digital display flowmeter 2 on the computer, and at the same time set the quantity of the prepared pour point depressant preparation to be added of the No. 2 digital display flowmeter 9 on the computer. When loading the vehicle, start the flow automatic control system 6, and the biodiesel and the pour point depressant preparation are loaded into the transport tank truck 10 synchronously.
[0024] Adding an electromechanical stirrer 5 can ensure that the pour point depressant and biodiesel are mixed more evenly. At the same time, the metering pump 7 can be circulated without starting, thus saving time, increasing the output of the pour point depressant preparation and ensuring the product quality.
[0025] When loading the biodiesel and the pour point depressant, the biodiesel and the prepared pour point depressant enter the mixing synchronously from the top material inlet g of the transport tank truck 10.
[0026] The specific operation process when using the present utility model for production is as follows:
[0027] According to the cold filter plugging point value of the biodiesel product required by the customer, determine the quantity of the pour point depressant to be added. After adding 0.1% of the pour point depressant of the oil solution of acrylate polymer to the biodiesel, the cold filter plugging point of the methyl ester can be correspondingly reduced by about 2°C. However, since the pour point depressant itself is relatively viscous and its density is about 0.92 g / cm3 at 15°C, uneven mixing may occur if it is directly added to the tank truck. Therefore, it is diluted according to the ratio of pour point depressant: methyl ester = 1:3.
[0028] Start the flow automatic control system 6, set the quantity of biodiesel of the No. 1 digital display flowmeter 2, start the biodiesel loading pump 1, and the biodiesel from the tank area enters from the biodiesel inlet a of the pour point depressant preparation tank 3. When the quantity of the biodiesel for dilution reaches the computer-set value, stop the biodiesel loading pump 1 and start the stirrer 5 to stir the materials; open the screw cap opening f of the barreled pour point depressant 4, insert the inlet of the pump moving suction pipe 8 to the bottom of the barrel, start the metering pump 7, and pump the barreled pour point depressant from the barrel to the pour point depressant circulation inlet d. When the quantity of the pour point depressant calculated in whole barrels is reached, manually stop the metering pump 7. At the same time as stopping pumping the barreled pour point depressant, stop the stirrer 5, and the preparation of the pour point depressant dilution liquid is completed and waiting for loading.
[0029] When the tank truck is to load biodiesel added with pour point depressant, the pour point depressant is added at a rate of 1‰. Assuming the loading weight of the tank truck is 33 tons, that is, 33 kg of pour point depressant is added per vehicle. Dilute it according to the ratio of pour point depressant: methyl ester = 1:3, and the prepared diluted methyl ester pour point depressant solution is 33×4 = 132 kg; the specific quantity of the diluted methyl ester pour point depressant to be added is set by the computer according to the customer's requirements and the above formula multiple.
[0030] Start the flow automatic control system 6, set the quantity of biodiesel of the digital display flowmeter 2 of No. 1, and at the same time set the quantity of the diluted methyl ester pour point depressant of the digital display flowmeter 9 of No. 2. Start the biodiesel loading pump 1. The biodiesel from the tank farm enters through the material inlet g of the transport tank truck 10 after passing through the biodiesel loading pump 1. At the same time, start the metering pump 7. After the diluted methyl ester pour point depressant exits from the pour point depressant outlet e and passes through the metering pump 7, it enters through the material inlet g of the transport tank truck 10 after passing through the digital display flowmeter 9 of No. 2. In order to fully mix the biodiesel and the diluted methyl ester pour point depressant, based on the loading time of the biodiesel loading pump 1 on the computer, set the loading time of the metering pump 7 for the diluted methyl ester pour point depressant to be synchronized with the loading time of the biodiesel loading pump 1.
Claims
1. A device for automatically adding pour point depressant during storage and transportation of biodiesel, characterized by: It comprises a biodiesel loading pump (1), a pour point depressant preparation tank (3), a barreled pour point depressant (4), an agitator (5), an automatic flow control system (6), a metering pump (7), a pump moving suction pipe (8), a transport tank truck (10) and connecting pipes; the automatic flow control system (6) comprises a flow regulating frequency converter FB, a No. 1 digital display flow meter (2) with a flow sensor, a No. 2 digital display flow meter (9) with a flow sensor, a program control system PLC, a computer and an electric control cabinet, and the PLC is connected to the flow regulating frequency converter FB, the No. 1 digital display flow meter (2), the No. 2 digital display flow meter (9) and the computer through signal lines; the pour point depressant preparation tank (3) is provided with a biodiesel inlet a and a pour point depressant circulation inlet d at the top, a liquid level meter upper outlet b is provided at the upper side, and a liquid level meter lower inlet c is provided at the lower side for installing a magnetic flap liquid level meter , a pour point depressant outlet e is provided on the other side of the lower part, and the pour point depressant outlet e is arranged in a symmetrical direction with the pour point depressant circulation inlet d. The pour point depressant preparation tank (3) is provided with an electric mechanical stirrer (5), and the electric mechanical stirrer (5) is installed at the upper center of the pour point depressant preparation tank (3); a pour point depressant screw cap inlet f is provided on the top of the barreled pour point depressant (4); a material inlet g is provided on the top of the transport tank truck (10); the biodiesel loading pump (1) is connected to the biodiesel inlet a on one side after being connected to the No. 1 digital display flow meter (2), and is connected to the material inlet g on the other side; the pour point depressant screw cap inlet f is connected to the pump moving suction pipe (8) and is combined with the pipeline of the pour point depressant outlet e, and then connected to the inlet of the metering pump (7); the outlet of the metering pump (7) is connected to the pour point depressant circulation inlet d on one side, and is connected to the material inlet g on the other side after being connected to the No. 2 digital display flow meter (9).
2. The device for automatically adding pour point depressant during storage and transportation of biodiesel as claimed in claim 1, characterized in that: The tail suction port end surface of the pump moving suction pipe (8) is provided with square U-shaped notches evenly distributed along the periphery, and the U-shaped notches are 3 mm deep and 3 mm wide.