Biological heavy oil neutralization device

Abstract

The utility model provides a biological heavy oil neutralizing device which comprises a neutralizing tank, an acid storage tank communicated with the neutralizing tank through a conveying pipeline, and a nitrogen device for supplying nitrogen into the neutralizing tank, a feeding pipe is arranged at the bottom of the neutralizing tank, and the neutralizing tank further comprises a material pumping pump for pumping out materials in the neutralizing tank; a nitrogen pipeline is arranged between the neutralization tank and the nitrogen device, the part, close to the neutralization tank, of the nitrogen pipeline is V-shaped, a first one-way valve and a second one-way valve are arranged at the two ends of the V-shaped part, the first one-way valve and the second one-way valve flow towards one side of the neutralization tank, an opening is formed in the bottom of the V-shaped part, and a backflow tank is mounted at the opening. The utility model provides a biological heavy oil neutralizing device which solves the problems that a stirring device composed of a traditional paddle and a motor is adopted in a biological heavy oil neutralizing device in the prior art, corrosion is easily generated in a solution, and liquid backflow possibly occurs after the stirring device is replaced with a nitrogen bubbling device.

Description

Technical Field

[0001] The utility model relates to the field of neutralization devices, in particular to a biological heavy oil neutralization device. Background Art

[0002] Bio-heavy oil is a byproduct of biodiesel distillation, with a calorific value of up to 9000 kcal per liter and a flash point greater than or equal to 220 degrees Celsius. It is a safe, efficient and economical biomass fuel, widely used in boilers and marine steam turbines. However, biodiesel is made by alkali-catalyzed transesterification, so the biodiesel byproduct bio-heavy oil contains a large amount of soap. The presence of soap leads to problems such as high kinematic viscosity, high cold filter point, poor fluidity, easy clogging, incomplete combustion and flameout of bio-heavy oil. Therefore, it is necessary to neutralize bio-heavy oil. The usual solution in the prior art is to add sulfuric acid to the neutralization tank for neutralization. However, sulfuric acid is a strong inorganic acid, easy to make poisons, easy to corrode, and there are huge safety hazards during use. In addition, the neutralization tank usually uses a traditional stirring device composed of a blade and a motor, such as a neutralization tank mentioned in CN219849622U, which has the disadvantage that the stirring device is easy to corrode in the solution, the maintenance cost is high, and the service life is short. In the prior art, stirring can be performed by introducing gas through a bubbling device, which can avoid the problem of corrosion of the stirring device. However, if a gas bubbling device is used, liquid backflow may occur in the gas path. The liquid backflows into the nitrogen device, which will reduce the life of the nitrogen device and increase maintenance costs. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a bio-heavy oil neutralization device, which solves the problem of liquid backflow that may occur when the stirring device composed of traditional blades and motors in the prior art bio-heavy oil neutralization device is replaced with a nitrogen device.

[0004] The utility model is realized by the following technical solutions:

[0005] A bio-heavy oil neutralization device comprises a neutralization tank, an acid storage tank connected to the neutralization tank through a delivery pipeline, and a nitrogen device for supplying nitrogen into the neutralization tank. A feed pipe is also provided at the bottom of the neutralization tank. The neutralization tank also comprises a pump for extracting materials from the neutralization tank.

[0006] A nitrogen pipeline is provided between the neutralization tank and the nitrogen device. The nitrogen pipeline is V-shaped near the neutralization tank. A first one-way valve and a second one-way valve are provided at both ends of the V-shaped part. The first one-way valve and the second one-way valve flow toward one side of the neutralization tank. The bottom of the V-shape is open, and a backflow tank is installed at the opening.

[0007] Furthermore, the nitrogen pipeline is horizontally inserted from the middle of the side of the neutralization tank, and the nitrogen pipeline bends downward and extends to the bottom of the neutralization tank.

[0008] Furthermore, the V-shaped bottom opening of the nitrogen pipeline is funnel-shaped, and the backflow tank can be made of glass with scale lines engraved on the tank body.

[0009] Furthermore, the nitrogen device includes a gas storage tank arranged on one side of the neutralization tank, the gas storage tank and the neutralization tank are connected through a nitrogen pipeline, a nitrogen compressor is arranged on one side of the gas storage tank, and the nitrogen compressor outlet is connected to the inside of the gas storage tank through a hose.

[0010] Furthermore, the tops of the neutralization tank and the acid storage tank are both provided with pressure safety valves, and the gas outlets of the pressure safety valves are both provided with molecular sieves.

[0011] Furthermore, the acid storage tank is provided with an acid replenishing port, the horizontal plane of the bottom of the acid storage tank is higher than the horizontal plane of the interface between the delivery pipeline and the neutralization tank, and a delivery pump is arranged on the delivery pipeline, the delivery pump flows toward the neutralization tank side, and a one-way valve is arranged at the outlet of the delivery pump, the one-way valve flows toward the neutralization tank side.

[0012] Furthermore, the neutralization tank is arranged on the first bracket, and the acid storage tank is arranged on the second bracket, and the second bracket supports the acid storage tank and fixedly connects the acid storage tank and the neutralization tank.

[0013] Furthermore, a pH meter is arranged in the neutralization tank, a control console for displaying pH is arranged on one side of the neutralization tank, and the pH meter is interconnected with the delivery pump and the control console.

[0014] Compared with the prior art, the utility model has the following beneficial effects: nitrogen blowing is used as a stirring method, and an anti-backflow device consisting of a V-shaped pipe, a backflow tank, a first one-way valve, and a second one-way valve is arranged between the nitrogen device and the neutralization tank, which effectively reduces the risk of the nitrogen device being corroded by the solution in the neutralization tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the V-shaped structure of the nitrogen pipeline of the utility model;

[0017] Figure 3 This is a top view of the acid storage tank and the neutralization tank of the utility model.

[0018] In the above drawings: 1, neutralization tank; 11, feed pipe; 12, molecular sieve; 13, extraction pump; 14, extraction pipeline; 15, first bracket; 2, acid storage tank; 21, delivery pipeline; 22, delivery pump; 23, one-way valve; 24, acid-base meter; 25, acid replenishment port; 26, pressure safety valve; 27, second bracket; 3, control console; 5, nitrogen device, 51, nitrogen pipeline; 52, first one-way valve; 53, V-shaped pipe; 54, second one-way valve; 55, backflow tank; 56 gas storage tank; 57, nitrogen compressor. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0020] like Figure 1 , Figure 2 A bio-heavy oil neutralization device shown includes a neutralization tank 1, an acid storage tank 2 connected to the neutralization tank 1 through a delivery pipeline 21, and a nitrogen device 5 for supplying nitrogen into the neutralization tank 1. A feed pipe 11 is also provided at the bottom of the neutralization tank 1. The neutralization tank 1 also includes a pumping pump 13 for extracting the material inside. The pumping pump 13 is connected to a pumping pipeline 14, and the pumping pipeline 14 extends to the bottom of the neutralization tank 1.

[0021] A nitrogen pipeline 51 is provided between the neutralization tank 1 and the nitrogen device 5. The nitrogen pipeline 51 is V-shaped near the neutralization tank 1. A first one-way valve 52 and a second one-way valve 54 are provided at both ends of the V-shaped part. The first one-way valve 52 and the second one-way valve 54 flow toward the neutralization tank 1. The bottom of the V-shape is open, and a backflow tank 55 is installed at the opening. The V-shaped structure is to prevent the liquid in the neutralization tank 1 from flowing back into the nitrogen device 5. Even if there is backflow of liquid, the liquid can flow into the backflow tank 55 under the action of gravity, rather than directly entering the gas storage tank 56 or the nitrogen compressor 57 along the pipeline.

[0022] like Figure 1 As shown, further, the nitrogen pipeline is horizontally inserted from the middle of the side of the neutralization tank 1, and the nitrogen pipeline bends downward and extends to the bottom of the neutralization tank 1, so that there is a height difference between the liquid and the nitrogen device 5, preventing the liquid from directly flowing into the nitrogen pipeline 51.

[0023] like Figure 2 As shown, further, the V-shaped bottom opening of the nitrogen pipeline 51 is funnel-shaped, the backflow tank 55 is made of glass and has scale lines engraved on the tank body, the funnel-shaped opening is wide at the top and narrow at the bottom, and after the liquid flows into the backflow tank 55 through the funnel-shaped opening, it is not easily disturbed by the gas, thereby causing splashing onto the pipe wall. After the liquid in the backflow tank 55 is full, the backflow tank 55 needs to be manually removed to empty the waste liquid and then installed.

[0024] like Figure 1As shown, further, the nitrogen device 5 includes a gas storage tank 56 arranged on one side of the neutralization tank 1, the gas storage tank 56 is connected to the neutralization tank 1 through a nitrogen pipeline 51, a nitrogen compressor 57 is arranged on one side of the gas storage tank 56, and the gas outlet of the nitrogen compressor 57 is connected to the inside of the gas storage tank 56 through a hose. The gas storage tank 56 can be used as a transfer station for gas and liquid storage equipment, which can absorb and store excess nitrogen, avoid frequent start and stop of the nitrogen compressor 57, and prevent the nitrogen compressor 57 from being damaged due to sudden changes in load. In addition, the gas storage tank 56 can also protect the equipment by buffering and reducing the pulsation of the compressed nitrogen discharged by the nitrogen compressor 57, reducing the impact on pipelines, joints and other equipment.

[0025] like Figure 3 As shown, further, the tops of the neutralization tank 1 and the acid storage tank 2 are both provided with pressure safety valves 26, and the air outlets of the pressure safety valves 26 are both provided with molecular sieves 12. The pressure safety valves 26 ensure that the air pressure in the tank can be kept normal. The molecular sieves 12 can adsorb the acetic acid gas volatilized by acetic acid. The molecular sieves can be carbon molecular sieves, which have adsorption properties to both nitrogen and acetic acid gas volatilized by acetic acid. The other end of the molecular sieve is connected to a nitrogen recovery system to recover the nitrogen into a recovery device to avoid nitrogen accumulation near the machine.

[0026] like Figure 1 As shown, further, the acid storage tank 2 is provided with an acid replenishing port 25, the bottom horizontal plane of the acid storage tank 2 is higher than the horizontal plane of the interface between the delivery pipe 21 and the neutralization tank 1, and the delivery pipe 21 is provided with a delivery pump 22, the delivery pump 22 can make the amount of acid added more accurate, the delivery pump 22 flows toward the side of the neutralization tank 1, and a third one-way valve 23 is provided at the outlet of the delivery pump 22, the third one-way valve 23 flows toward the side of the neutralization tank 1, on the one hand, the load of the delivery pump 22 is reduced, on the other hand, gravity can be used to prevent liquid backflow, and the third one-way valve 23 can prevent liquid backflow.

[0027] like Figure 1 As shown, further, the neutralization tank 1 is arranged on the first bracket 15, and the acid storage tank 2 is arranged on the second bracket 27. The second bracket 27 supports the acid storage tank 2 and fixedly connects the acid storage tank 2 and the neutralization tank 1. The second bracket 27 is arranged to make the horizontal plane of the bottom of the acid storage tank 2 higher than the horizontal plane of the interface between the conveying pipe and the neutralization tank 1. The purpose of welding the acid storage tank 2 and the neutralization tank 1 is to make the whole more stable.

[0028] like Figure 1As shown, further, a pH meter 24 is provided in the neutralization tank 1, and a control console 3 for displaying the pH value is provided on one side of the neutralization tank 1. The control console 3 is composed of a PLC and a host computer. The pH meter 24 and the delivery pump 22 are interconnected with the PLC through a signal line, and the PLC and the host computer are connected to the serial port through a communication line. The pH meter 24 detects the pH value in the tank to feed back to the control console 3, and the control console 3 controls the delivery pump 22 to deliver a corresponding amount of acid. The pH meter 24 is a commonly used instrument that measures the pH value by using the potential difference between the electrode and the liquid to be tested. The pH meter can be interconnected with the PLC to transmit the pH and display it on the host computer. The delivery pump 22 has a flow monitoring sensor, which transmits the signal to the PLC. The host computer is set with a qualified pH range through the PLC programming software. When the pH meter detects the pH, the host computer calculates the required amount of acid through the program, and the host computer transmits a start signal to the delivery pump 22. After detecting that the pH is within the qualified range, the host computer will transmit a stop signal to the delivery pump 22, thereby achieving the control effect of the pH.

[0029] Before using the neutralization tank 1, first confirm whether there is any liquid stored in the backflow tank 55. If there is liquid, it needs to be emptied, then the delivery pump 22, the control console 3, and the nitrogen compressor 57 are connected to the power supply, the nitrogen compressor 57 is connected to the nitrogen gas source, and the feed pipeline is connected to the material source.

[0030] After the above matters are confirmed, start adding bio-heavy oil into the neutralization tank 1. After adding as needed, the pH meter 24 detects the pH value of the bio-heavy oil and feeds the pH value back to the host computer. The host computer calculates the amount of acetic acid required to neutralize the bio-heavy oil. The host computer controls the delivery pump 22 to work and add a corresponding amount of acetic acid into the neutralization tank 1. While the delivery pump 22 is working, the nitrogen compressor 57 compresses nitrogen into the gas storage tank 56. The gas storage tank 56 can absorb the changes in the airflow of the nitrogen compressor and store the intermittently generated airflow so that the airflow can be output smoothly and released during the peak demand period to ensure the stability and continuity of the output airflow. The power of the nitrogen compressor 57 is sufficient to support the normal effect of nitrogen blowing, so that the acetic acid and the bio-heavy oil are evenly mixed. In order to prevent backflow at the nitrogen pipeline 51, the nitrogen pipeline 51 is horizontally connected to the side of the neutralization tank 1 and bent downward. At the bottom of the neutralization tank 1, the middle part of the nitrogen pipeline 51 is V-shaped, and the second one-way valve 54 and the third one-way valve 23 are arranged at both ends of the V-shaped tube 53. The gas flow direction controlled by the second one-way valve 54 and the third one-way valve 23 is to flow toward the neutralization tank 1, which can prevent the liquid in the neutralization tank 1 from flowing back into the nitrogen pipeline 51. The V-shaped bottom opening is connected to a detachable backflow tank 55 made of tempered glass. The backflow tank 55 is provided with scale lines, so that it can be clearly and intuitively observed whether there is liquid in the backflow tank 55 and whether the backflow tank 55 needs to be emptied. The V-shaped structure is to ensure that even if there is liquid backflow, the liquid can flow into the backflow tank 55 under the action of gravity, instead of directly entering the gas storage tank 56 or the nitrogen compressor 57 along the pipeline to cause pipeline corrosion or machine damage. The liquid flowing into the backflow tank 55 needs to be manually emptied after reaching the top scale line. After the mixing is completed, the pH meter 24 detects the pH of the liquid in the neutralization tank 1 again. If the pH is within the standard range, the nitrogen compressor 57 stops running and the neutralized bio-heavy oil is extracted through the extraction pump. If the pH does not meet the standard, the required acid is calculated again to compensate for the deviation value.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A bio-heavy oil neutralization device, characterized in that: The invention comprises a neutralization tank (1), an acid storage tank (2) connected to the neutralization tank (1) via a delivery pipe (21), and a nitrogen device (5) for supplying nitrogen into the neutralization tank (1). A feed pipe (11) is also provided at the bottom of the neutralization tank (1). The neutralization tank (1) also comprises a pumping pump (13) for pumping out the material in the neutralization tank (1); A nitrogen pipeline (51) is provided between the neutralization tank (1) and the nitrogen device (5). The nitrogen pipeline (51) is V-shaped near the neutralization tank (1). A first one-way valve (52) and a second one-way valve (54) are provided at both ends of the V-shaped portion. The first one-way valve (52) and the second one-way valve (54) allow flow to flow toward one side of the neutralization tank (1). The bottom of the V-shaped portion is open, and a backflow tank (55) is installed at the opening.

2. A bio-heavy oil neutralization device according to claim 1, characterized in that: The nitrogen pipeline (51) is horizontally connected from the middle of the outer side of the neutralization tank (1), and the nitrogen pipeline (51) bends downward inside the neutralization tank (1) and then extends to the bottom of the neutralization tank (1).

3. A bio-heavy oil neutralization device according to claim 2, characterized in that: The V-shaped bottom opening of the nitrogen pipeline (51) is funnel-shaped, and the backflow tank (55) is made of a transparent material and has scale lines engraved on the tank body.

4. A bio-heavy oil neutralization device according to claim 1, characterized in that: The nitrogen device (5) comprises a gas storage tank (56) arranged on one side of the neutralization tank (1); the gas storage tank (56) is connected to the neutralization tank (1) via a nitrogen pipeline (51); a nitrogen compressor (57) is arranged on one side of the gas storage tank (56); and an outlet of the nitrogen compressor (57) is connected to the interior of the gas storage tank (56) via a hose.

5. A bio-heavy oil neutralization device according to claim 1, characterized in that: The tops of the neutralization tank (1) and the acid storage tank (2) are both provided with pressure safety valves (26), and the gas outlets of the pressure safety valves (26) are both provided with molecular sieves (12).

6. A bio-heavy oil neutralization device according to claim 1, characterized in that: The acid storage tank (2) is provided with an acid replenishing port (25), the bottom level of the acid storage tank (2) is higher than the level of the interface between the delivery pipeline (21) and the neutralization tank (1), and the delivery pipeline (21) is provided with a delivery pump (22), the delivery pump (22) flows toward the neutralization tank (1), and a third one-way valve (23) is provided at the outlet of the delivery pump (22) for flowing toward the neutralization tank (1).

7. A bio-heavy oil neutralization device according to claim 1, characterized in that: The neutralization tank (1) is arranged on a first bracket (15), and the acid storage tank (2) is arranged on a second bracket (27). The second bracket (27) supports the acid storage tank (2) and fixedly connects the acid storage tank (2) and the neutralization tank (1).

8. A bio-heavy oil neutralization device according to claim 1, characterized in that: The neutralization tank (1) is provided with an acid-base meter (24), and a control console (3) for displaying the acid-base value is provided on one side of the neutralization tank (1). The acid-base meter (24) and the delivery pump (22) are interconnected with the control console (3).

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