Layered dehydration device for coal tar raw materials

Abstract

The utility model belongs to the technical field of coal tar chemical industry, and particularly discloses a coal tar raw material layering dehydration device which comprises a raw material tank and a base, the lower end of the raw material tank is fixedly connected with the base, a feeding port is formed in the top of the raw material tank, and the outer side of the raw material tank is sleeved with a steam heat exchange sleeve. A water layer drain pipe is fixedly connected to the upper side of the raw material tank, an oil layer drain pipe is fixedly connected to the lower side of the raw material tank, a mixed drain pipe is fixedly connected between the water layer drain pipe and the oil layer drain pipe, the other end of the mixed drain pipe is fixedly connected with an electromagnetic three-way valve, and a liquid density sensor is fixedly connected to the inner wall of the raw material tank at the position of the mixed drain pipe. According to the utility model, the three liquid discharge pipes with different height positions are arranged, the liquid density sensor is arranged at the input end of the mixed liquid discharge pipe, and the controller is linked with the electromagnetic three-way valve at the output end of the mixed liquid discharge pipe, so that the automatic distinguishing and confirmation of an oil-water separation end point are realized, and the accuracy of oil-water separation is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal tar chemical industry, in particular to a coal tar raw material layered dehydration device. Background Art

[0002] Coal tar is one of the products obtained from the pyrolysis (heating in an airtight environment) and gasification of coal. It is a viscous liquid with a strong pungent odor. Coal tar contains a large amount of aromatic hydrocarbons, aromatic oxygenates, and heterocyclic compounds, and has great development potential. Currently, coal tar is used as an important industrial raw material in many industries, including the production of plastics, fuels, and pharmaceuticals. In addition to the active ingredients, coal tar raw materials also contain a large number of solid particles, water, and other impurities. These impurities affect the processing and utilization of coal tar. Therefore, the efficient utilization of coal tar must be based on sufficient pretreatment and purification of coal tar. The efficient and thorough removal of water from coal tar has always been a key research topic in the industry.

[0003] Currently, when using coal tar as a raw material, it must first be pumped into a raw material tank, then heated to 60-70°C and left to stand for 48 hours for dehydration. After the dehydration process is complete, the coal tar is pumped into the production area for use. However, this dehydration method is time-consuming and inefficient. Furthermore, when separating the coal tar and water after static stratification, operators often use the observation window on the raw material tank to determine whether the water has been drained and separated. This often leads to errors in determining the endpoint of the oil-water separation, resulting in poor accuracy in the oil-water separation. Therefore, it is necessary to design a coal tar raw material stratification dehydration device with high dehydration efficiency and good oil-water separation accuracy. Utility Model Content

[0004] In response to the above technical problems, the utility model provides a coal tar raw material stratified dehydration device with high dehydration efficiency and good oil-water separation accuracy, so as to solve the problem that manual determination of the oil-water separation end point is prone to errors, resulting in poor oil-water separation accuracy.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows: a coal tar raw material stratification dehydration device, including a raw material tank and a base, the lower end of the raw material tank is fixedly connected to the base, the top of the raw material tank is provided with a feed port, the outer side is provided with a steam heat exchange sleeve, the input end and the output end pipeline of the steam heat exchange sleeve are both installed with regulating air valves, a stirring mechanism is provided in the raw material tank, an ultrasonic liquid level sensor is fixedly connected to the top of the raw material tank, a water layer drain pipe is fixedly connected to the upper side of the raw material tank, the other end of the water layer drain pipe is connected to the water layer collecting pipe, the lower side of the raw material tank is fixedly connected to the oil layer drain pipe, the oil layer drain pipe is fixedly connected to the lower side of the raw material tank, and the oil layer drain pipe is fixedly connected to the lower side of the raw material tank. The other end of the liquid pipe is connected to the oil layer collection pipe, and the output end of the oil layer collection pipe is fixedly connected to an oil pump. One side of the raw material tank is fixedly connected to a mixed drainage pipe between the water layer drainage pipe and the oil layer drainage pipe. The other end of the mixed drainage pipe is fixedly connected to an electromagnetic three-way valve. One branch of the electromagnetic three-way valve is connected to the water layer collection pipe, and the other branch is connected to the oil layer collection pipe. The inner wall of the raw material tank is fixedly connected to the position of the mixed drainage pipe. The ultrasonic liquid level sensor, electromagnetic three-way valve, and liquid density sensor are all controlled by a controller. Valves are installed on the water layer drainage pipe and the oil layer drainage pipe.

[0006] Furthermore, the stirring mechanism includes a stirring motor and a stirring paddle. The stirring motor is fixedly connected to the top of the raw material tank. The output end of the stirring motor extends into the raw material tank and is fixedly connected to the upper end of the stirring paddle.

[0007] Furthermore, a sealing cover is hinged on the feed port, and a breathing valve is fixedly connected to the top of the raw material tank.

[0008] Compared with the prior art, the present invention has the following advantages:

[0009] 1. The utility model sets a water layer drainage pipe, an oil layer drainage pipe and a mixed drainage pipe at different heights to discharge the water layer and the oil layer separately from the high and low places out of the raw material tank, sets a liquid density sensor at the input end of the mixed drainage pipe, and links the controller with the electromagnetic three-way valve at the output end of the mixed drainage pipe to distinguish the liquid discharged from the mixed drainage pipe at this time according to the difference in density between coal tar and water, and controls the electromagnetic three-way valve through the controller to make the coal tar enter the oil layer collection pipe and the water enter the water layer collection pipe, thereby realizing automatic distinction and confirmation of the oil-water separation end point and improving the accuracy of oil-water separation; by adding a stirring mechanism in the raw material tank, the coal tar raw material is stirred and centrifuged by the stirring mechanism, and the rate of oil-water separation of the coal tar raw material is accelerated by the action of centrifugal force, thereby improving the efficiency of the coal tar raw material dehydration treatment using this device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the present utility model.

[0011] In the figure: 1. Raw material tank, 2. Base, 3. Feed port, 4. Steam heat exchange sleeve, 5. Regulating air valve, 6. Stirring mechanism, 61. Stirring motor, 62. Stirring paddle, 7. Ultrasonic liquid level sensor, 8. Water layer drain pipe, 9. Water layer collection pipe, 10. Oil layer drain pipe, 11. Oil layer collection pipe, 12. Oil pump, 13. Mixing drain pipe, 14. Solenoid three-way valve, 15. Liquid density sensor, 16. Breathing valve. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] like Figure 1The coal tar raw material stratified dehydration device shown includes a raw material tank 1 and a base 2. The lower end of the raw material tank 1 is fixedly connected to the base 2. A feed port 3 is provided on the top of the raw material tank 1, and a steam heat exchange sleeve 4 is provided on the outer side. A regulating valve 5 is installed on the input and output pipes of the steam heat exchange sleeve 4. The input and output pipes of the steam heat exchange sleeve 4 are respectively connected to the steam gas source. A stirring mechanism 6 is provided in the raw material tank 1. An ultrasonic liquid level sensor 7 is fixedly connected to the top of the raw material tank 1. The ultrasonic liquid level sensor 7 monitors the liquid level in the raw material tank 1 in real time and transmits the liquid level result signal to the controller. The controller transmits the liquid level result signal to the controller. To the display, the coal tar liquid level in the raw material tank 1 can be detected in real time through the ultrasonic liquid level sensor 7 to prevent the raw material tank 1 from overflowing during feeding and causing waste of coal tar. A water layer drainage pipe 8 is fixedly connected to the upper side of the raw material tank 1, and the other end of the water layer drainage pipe 8 is connected to the water layer collecting pipe 9. The output end of the water layer collecting pipe 9 is connected to the water treatment pool. An oil layer drainage pipe 10 is fixedly connected to the lower side of the raw material tank 1, and the other end of the oil layer drainage pipe 10 is connected to the oil layer collecting pipe 11. The output end of the oil layer collecting pipe 11 is fixedly connected to an oil pump 12. The oil pump 12 is preferably a coal tar pump. The output end of the oil pump 12 is connected to the coal tar delivery pipeline in the workshop. A mixing drainage pipe 13 is fixedly connected to the side of the raw material tank 1 between the heights of the water layer drainage pipe 8 and the oil layer drainage pipe 10. Preferably, the water layer drainage pipe 8 is set at the highest point of the raw material tank 1, and the mixing drainage pipe 13 is set in the middle of the raw material tank 1 and more biased towards the side of the water layer drainage pipe 8. The other end of the mixing drainage pipe 13 is fixedly connected to an electromagnetic three-way valve 14. One branch of the electromagnetic three-way valve 14 is connected to the water layer collection pipe 9, and the other branch is connected to the oil layer collection pipe 11. The inner wall of the raw material tank 1 is fixedly connected to the position of the mixing drainage pipe 13. The liquid density sensor 15 detects the density of the liquid based on the water and coal tar. The difference in density can be used to distinguish whether the liquid at the density sensor position is a water layer or an oil layer. The density value of water is set to a preset value in the controller. When the controller receives the detection result signal transmitted by the liquid density sensor 15, it is converted into a density value and compared with the preset value. When the comparison result of the two is that the detection value is greater than the preset value, the liquid at this time is coal tar. When the comparison result of the two is that the detection value is equal to or close to the preset value, the liquid at this time is water. The ultrasonic liquid level sensor 7, the electromagnetic three-way valve 14, and the liquid density sensor 15 are all controlled by the controller, and valves are installed on the water layer drainage pipe 8 and the oil layer drainage pipe 10.

[0014] In order to stir the coal tar in the raw material tank 1 and accelerate the oil-water stratification of the coal tar under the action of centrifugal force, the stirring mechanism 6 includes a stirring motor 61 and a stirring paddle 62. The stirring motor 61 is fixedly connected to the top of the raw material tank 1, and the output end of the stirring motor 61 extends into the raw material tank 1 and is fixedly connected to the upper end of the stirring paddle 62.

[0015] In order to prevent impurities from entering the raw material tank 1 from the feed port 3 and contaminating the coal tar raw materials in the raw material tank 1, a sealing cover is hinged on the feed port 3. In order to maintain the air pressure balance in the raw material tank 1 when the sealing cover is closed, a breathing valve 16 is fixedly connected to the top of the raw material tank 1. When the air pressure in the raw material tank 1 is too different from the external air pressure, the gas can enter or be discharged from the raw material tank 1 through the breathing valve 16 to maintain the air pressure balance inside and outside the raw material tank 1.

[0016] The specific working process of this utility model is as follows:

[0017] The coal tar after unloading is pumped into the feed port 3, and the coal tar raw material enters the raw material tank 1. The ultrasonic liquid level sensor 7 monitors the liquid level in the raw material tank 1 in real time and transmits the result to the controller. The controller transmits the liquid level result signal to the display. The operator stops feeding in time according to the liquid level value in the display, closes the sealing cover on the feed port 3, turns on the switch of the stirring motor 61, starts the stirring motor 61, drives the stirring paddle 62 to rotate, stirs the coal tar raw material in the tank, and accelerates the stratification of the coal tar raw material under the action of centrifugal force, opens the regulating valve 5 on the input and output ends of the steam heat exchange sleeve 4, allows steam to enter the steam heat exchange sleeve 4, heats the coal tar in the tank and keeps it warm, and after stirring for a period of time, turns off the stirring motor 61, and allows the coal tar raw material in the raw material tank 1 to stand and stratify.

[0018] After the standing time is over, first open the valve on the water layer drainage pipe 8, and discharge the upper water layer after standing and stratifying from the water layer drainage pipe 8 out of the raw material tank 1 and into the water layer collection pipe 9. The ultrasonic liquid level sensor 7 monitors the liquid level in the raw material tank 1 in real time and displays the liquid level result through the controller and the display. When the liquid level just drops to the position below the input port of the water layer drainage pipe 8, the operator closes the valve on the water layer drainage pipe 8, and the controller closes the power switch of the electromagnetic three-way valve 14. At this time, the liquid density sensor 15 detects the density of the liquid and transmits the signal to the controller for comparison. When the comparison result of the controller is that the two are close, the controller controls the electromagnetic three-way valve 14 to close the liquid density sensor 15. 9 The solenoid valve on the branch connected to the raw material tank 1 is opened to discharge the water layer. When the result of the comparison by the controller is that the detection value is greater than the preset value, the controller controls the solenoid valve on the branch connected to the oil layer collecting pipe 11 in the solenoid three-way valve 14 to open and discharge the coal tar in the raw material tank 1. The ultrasonic liquid level sensor 7 monitors the liquid level in real time and transmits the result. When the liquid level is lower than the input end of the mixed drainage pipe 13, the controller disconnects the circuit of the solenoid three-way valve 14, and the operator opens the valve on the oil layer drainage pipe 10 to discharge all the coal tar in the raw material tank 1. After the discharge is completed, the valve on the oil layer drainage pipe 10 is closed again, and the untreated coal tar raw material is added from the feed port again for dehydration treatment again.

Claims

1. A coal tar raw material stratification dehydration device, comprising a raw material tank (1) and a base (2), wherein the lower end of the raw material tank (1) is fixedly connected to the base (2), the raw material tank (1) is provided with a feed port (3) on the top, and a steam heat exchange sleeve (4) is provided on the outer side, and regulating valves (5) are installed on the input and output pipes of the steam heat exchange sleeve (4), characterized in that: The raw material tank (1) is provided with a stirring mechanism (6), the top of the raw material tank (1) is fixedly connected with an ultrasonic liquid level sensor (7), the upper side of the raw material tank (1) is fixedly connected with a water layer drainage pipe (8), the other end of the water layer drainage pipe (8) is connected to a water layer collection pipe (9), the lower side of the raw material tank (1) is fixedly connected with an oil layer drainage pipe (10), the other end of the oil layer drainage pipe (10) is connected to an oil layer collection pipe (11), the output end of the oil layer collection pipe (11) is fixedly connected with an oil pump (12), and one side of the raw material tank (1) is located between the water layer drainage pipe (8) and the oil layer drainage pipe (10). A mixing drainage pipe (13) is fixedly connected between the raw material tank (1) and the raw material tank (1). The other end of the mixing drainage pipe (13) is fixedly connected to an electromagnetic three-way valve (14). One branch of the electromagnetic three-way valve (14) is connected to the water layer collection pipe (9), and the other branch is connected to the oil layer collection pipe (11). A liquid density sensor (15) is fixedly connected to the inner wall of the raw material tank (1) at the position of the mixing drainage pipe (13). The ultrasonic liquid level sensor (7), the electromagnetic three-way valve (14), and the liquid density sensor (15) are all controlled by a controller. Valves are installed on the water layer drainage pipe (8) and the oil layer drainage pipe (10).

2. The coal tar raw material stratification dehydration device according to claim 1, characterized in that: The stirring mechanism (6) comprises a stirring motor (61) and a stirring paddle (62); the stirring motor (61) is fixedly connected to the top of the raw material tank (1); the output end of the stirring motor (61) extends into the raw material tank (1) and is fixedly connected to the upper end of the stirring paddle (62).

3. The coal tar raw material stratification dehydration device according to claim 1, characterized in that: A sealing cover is hingedly connected to the feed port (3), and a breathing valve (16) is fixedly connected to the top of the raw material tank (1).

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