Automatic dewatering system in fluid vacuum
阅读说明：本技术 一种油液真空自动脱水系统 (Automatic dewatering system in fluid vacuum ) 是由 张明明 王博 李玉琴 王超 于新洋 吴阳林 李平材 刘佩芝 潘焱 于 2019-11-21 设计创作，主要内容包括：本发明提供了一种油液真空自动脱水系统,包括循环单元和用于控制循环单元自动运行的控制单元,所述循环单元包括油箱、可调流量泵组一、可调流量泵组二、真空罐、比例节流阀和真空泵,所述油箱的出油口通过可调流量泵组一与真空罐相连,所述真空罐通过可调流量泵组二与油箱的回油口相连,所述真空罐通过真空泵与出气口相连,进气口通过比例节流阀与真空罐相连；所述真空罐内设有真空度传感器和温度传感器,通过真空度传感器和温度传感器与比例节流阀配合实现真空罐内的真空度与水汽化的温度相匹配。该自动脱水系统不仅油液分离效率高,处理后的油液水分含量低；而且自动化程度高,效率快。(The invention provides an oil vacuum automatic dehydration system, which comprises a circulation unit and a control unit for controlling the automatic operation of the circulation unit, wherein the circulation unit comprises an oil tank, a first flow-adjustable pump set, a second flow-adjustable pump set, a vacuum tank, a proportional throttle valve and a vacuum pump; and a vacuum degree sensor and a temperature sensor are arranged in the vacuum tank, and the vacuum degree in the vacuum tank is matched with the temperature of water vaporization by matching the vacuum degree sensor and the temperature sensor with a proportional throttle valve. The automatic dehydration system has high oil-liquid separation efficiency, and the water content of the treated oil liquid is low; and moreover, the automation degree is high, and the efficiency is high.)
1. An oil vacuum automatic dehydration system is characterized by comprising a circulation unit and a control unit for controlling the automatic operation of the circulation unit, wherein the circulation unit comprises an oil tank, a first flow-adjustable pump set, a second flow-adjustable pump set, a vacuum tank, a proportional throttle valve for adjusting the vacuum degree in the vacuum tank and a vacuum pump for providing negative pressure and discharging vaporized water vapor in the vacuum tank; and a vacuum degree sensor and a temperature sensor are arranged in the vacuum tank, and the vacuum degree in the vacuum tank is matched with the temperature of water vaporization by matching the vacuum degree sensor and the temperature sensor with a proportional throttle valve.
2. The automatic oil vacuum dewatering system of claim 1, further comprising a liquid level sensor disposed in the vacuum tank, wherein the first flow-adjustable pump set and the second flow-adjustable pump set cooperate with the liquid level sensor to adjust the height of the liquid level in the vacuum tank.
3. The automatic oil vacuum dewatering system according to claim 1, wherein an oil outlet pipe is arranged between an oil outlet of the oil tank and the vacuum tank; an oil return pipeline is arranged between the vacuum tank and an oil outlet of the oil tank.
4. The automatic oil vacuum dewatering system of claim 3, wherein a nozzle is disposed at an end of the oil outlet pipe near the vacuum tank, and oil in the oil outlet pipe is injected into the vacuum tank through the nozzle.
5. The automatic oil vacuum dewatering system of claim 1, wherein a heater is provided in the oil tank for heating oil.
6. The automatic oil vacuum dewatering system according to claim 5, wherein the temperature of the oil in the oil tank is 65-80 ℃.
7. The automatic oil vacuum dewatering system of claim 1, wherein the vacuum degree in the vacuum tank is-99 to-70 kPa.
8. The automatic oil vacuum dewatering system of claim 1, wherein the proportional throttle valve is connected to the air inlet via a gas dryer.
9. The automatic oil vacuum dewatering system of claim 1, wherein the vacuum pump is connected to the air outlet via a silencer.
10. The automatic oil vacuum dewatering system according to any one of claims 2-9, wherein the control unit comprises a controller, the controller comprises a signal input module, a signal output module and a data processing module, the signal input module is connected with a vacuum degree sensor, a temperature sensor and a liquid level sensor, the signal output module is connected with a first flow-adjustable pump set, a second flow-adjustable pump set and a proportional throttle valve, and the signal input module and the signal output module are both connected with the data processing module.
Technical Field
The invention relates to the technical field of oil liquid dehydration, in particular to an oil liquid vacuum automatic dehydration system.
Background
The oil liquid plays the roles of energy transfer, abrasion resistance, system lubrication, corrosion prevention, rust prevention, cooling and the like in a hydraulic system. The oil contaminants are mainly solid particles, moisture, air and chlorides. In practice and research, one of the main reasons for the deterioration of the oil performance is that water enters the oil, and water pollution causes the deterioration of the oil performance, resulting in the abrasion of elements.
Disclosure of Invention
The invention aims to provide an oil vacuum automatic dehydration system which can achieve the aim of automatically dehydrating oil by adopting a mode of automatically matching and controlling temperature, vacuum degree and liquid level, and has high automation degree and high efficiency.
In order to achieve the purpose, the invention provides an oil vacuum automatic dehydration system which comprises a circulation unit and a control unit for controlling the automatic operation of the circulation unit, wherein the circulation unit comprises an oil tank, a first flow-adjustable pump set, a second flow-adjustable pump set, a vacuum tank, a proportional throttle valve for adjusting the vacuum degree in the vacuum tank and a vacuum pump for providing negative pressure and discharging vaporized water vapor in the vacuum tank; and a vacuum degree sensor and a temperature sensor are arranged in the vacuum tank, and the vacuum degree in the vacuum tank is matched with the temperature of water vaporization by matching the vacuum degree sensor and the temperature sensor with a proportional throttle valve.
Furthermore, a liquid level sensor is further arranged in the vacuum tank, and the liquid level in the vacuum tank is adjusted through the cooperation of the first flow-adjustable pump set and the second flow-adjustable pump set and the liquid level sensor.
Further, an oil outlet pipeline is arranged between the oil outlet of the oil tank and the vacuum tank; an oil return pipeline is arranged between the vacuum tank and an oil outlet of the oil tank.
Furthermore, one end of the oil outlet pipeline, which is close to the vacuum tank, is provided with a spray head, and oil in the oil outlet pipeline is injected into the vacuum tank through the spray head.
Furthermore, a heater for heating oil is arranged in the oil tank.
Furthermore, the temperature of the oil in the oil tank is 65-80 ℃.
Furthermore, the vacuum degree in the vacuum tank is-99 to-70 kPa.
Further, the proportional throttle valve is connected with the air inlet through the gas drier.
Further, the vacuum pump is connected with the air outlet through a silencer.
Furthermore, the control unit comprises a controller, the controller comprises a signal input module, a signal output module and a data processing module, the signal input module is connected with the vacuum degree sensor, the temperature sensor and the liquid level sensor, the signal output module is connected with the first flow-adjustable pump set, the second flow-adjustable pump set and the proportional throttle valve, and the signal input module and the signal output module are both connected with the data processing module.
The invention has the following beneficial effects:
the invention provides an oil vacuum automatic dehydration system which comprises a circulating unit and a control unit for controlling the automatic operation of the circulating unit. On one hand, the circulating unit pumps oil from the oil tank into the vacuum tank through the first adjustable flow pump set; on the other hand, the upper end of the oil liquid level of the vacuum tank is communicated with an air inlet, and air dried by the gas dryer is introduced. A proportional throttle valve is arranged between the gas drier and the vacuum tank. The proportional throttle valve mainly adjusts air inflow through the size of a throttle opening, and then adjusts the vacuum degree in the vacuum tank. Meanwhile, the other end of the vacuum tank discharges redundant gas into the atmosphere through the air outlet through the vacuum pump and the silencer, and the vacuum pump and the silencer cooperatively enable the upper end of the liquid level to form a certain vacuum degree (namely negative pressure). Oil in the oil tank is heated to 65-80 ℃ firstly (the oil is heated to 65-80 degrees), so that the oil is not damaged on the one hand, and on the other hand, moisture in the oil is easy to vaporize under the negative pressure condition), and then the oil is sucked into the vacuum tank through the first adjustable flow pump set and is sprayed out through the spray head. The sprayed high-temperature oil is under the action of negative pressure in the vacuum tank, the water in the oil can be removed by utilizing the principle of water vaporization under the conditions of negative pressure and high temperature, the water in the oil is vaporized and sucked out by the vacuum pump, the remaining oil returns to the vacuum tank, enters the oil tank through the second adjustable flow pump set, and the oil dehydration process is completed. Meanwhile, the control unit automatically controls the vacuum degree in the vacuum tank to be matched with the temperature of water vaporization through a vacuum degree sensor, a liquid level sensor, a temperature sensor, a first adjustable flow pump set, a second adjustable flow pump set and a proportional throttle valve. Namely, the vacuum degree in the vacuum tank is lower than the corresponding vacuum degree when the water is boiled at the oil temperature, so as to achieve the vaporization condition of the water in the oil. Therefore, the oil-liquid separation is high in efficiency, and the water content of the treated oil liquid is low; moreover, the automatic dewatering device is high in automation degree and high in efficiency, and oil liquid is more simply and quickly dewatered.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of an automatic oil vacuum dewatering system according to a preferred embodiment of the present invention (in the figure, solid lines represent circulation lines, and dotted lines represent a control circuit);
the device comprises a
Detailed Description
Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 1, an oil vacuum automatic dehydration system comprises a circulation unit and a control unit for controlling the automatic operation of the circulation unit, wherein the circulation unit comprises an
One end of the oil outlet pipeline, which is close to the
The
The control unit comprises a
The working process is as follows: firstly, the circulation unit pumps oil from the oil tank to the vacuum tank through the first adjustable flow pump set. On the other hand, the upper end of the oil liquid level of the vacuum tank is communicated with an air inlet, and air dried by the gas dryer is introduced. A proportional throttle valve is arranged between the gas drier and the vacuum tank. The proportional throttle valve mainly adjusts air inflow through the size of a throttle opening, and then adjusts the vacuum degree in the vacuum tank. Meanwhile, the other end of the vacuum tank discharges redundant gas into the atmosphere through the air outlet through the vacuum pump and the silencer, and the vacuum pump and the silencer cooperatively enable the upper end of the liquid level to form a certain vacuum degree (namely negative pressure). A heater for heating hydraulic pressure is arranged in the oil tank, and the oil is heated to 65-80 ℃ (the oil is heated to 65-80 ℃, so that the oil is not damaged, and moisture in the oil is easy to vaporize under the negative pressure condition); then the oil liquid sucked into the vacuum tank through the adjustable flow pump set is sprayed out through the spray head. The sprayed high-temperature oil is under the action of negative pressure in the vacuum tank, the water in the oil can be removed by utilizing the principle of water vaporization under the conditions of negative pressure and high temperature, the water in the oil is vaporized and sucked out by the vacuum pump, the remaining oil returns to the vacuum tank and enters the oil tank through the second adjustable flow pump set, and the oil dewatering process is completed. Specifically, after the oil is heated in the oil tank, the liquidity is good, the evaporation of water in the oil is promoted, meanwhile, when the oil is injected into the vacuum tank through the spray head, a certain negative pressure is kept in the vacuum tank, the pressure of the liquid is quickly reduced to be below the saturated vapor pressure of the liquid, the liquid enters an overheat state, and the liquid is instantly boiled; due to the rapid expansion of the gas phase, the hydraulic column is rapidly crushed and refined, so that the rapid separation of oil and water molecules is realized, and the water molecules rapidly form water vapor at high temperature and high vacuum to be discharged by a vacuum pump. Therefore, the oil-liquid separation efficiency is high, and the water content of the treated oil liquid is low.
The correspondence between boiling point and vacuum degree of water is shown in Table 1. For example, when the oil vacuum automatic dehydration system works, when the oil in the oil tank is heated to 70 ℃, the air entering the vacuum tank is controlled by adjusting the proportional throttle valve, so that the vacuum degree in the vacuum tank is adjusted to be below 70kPa, and the moisture in the oil reaches the vaporization condition under the vacuum degree, is changed into water vapor and is discharged into the atmosphere through the vacuum pump. The controller of the oil vacuum automatic dehydration system enables the whole system to reach a dynamic balance circulation state by controlling the flow of the first flow-adjustable pump set, the second flow-adjustable pump set and the proportional throttle valve, as well as the vacuum degree, the liquid level height and the oil temperature in the vacuum pump.
TABLE 1 relationship between boiling point and vacuum degree of water
Temperature (. degree.C.)
Vacuum degree (kpa)
Temperature (. degree.C.)
Vacuum degree (kpa)
Temperature (. degree.C.)
Vacuum degree (kpa)
Temperature (. degree.C.)
Vacuum degree (kpa)
20
-98.7
40
-93.7
60
-81.2
80
-53.9
21
-98.6
41
-93.3
61
-80.3
81
-51.9
22
-98.4
42
-92.9
62
-79.3
82
-49.9
23
-98.3
43
-92.5
63
-78.3
83
-47.8
24
-98.1
44
-92.0
64
-77.2
84
-45.6
25
-97.9
45
-91.5
65
-76.1
85
-43.4
26
-97.7
46
-91.0
66
-75.0
86
-41.1
27
-97.5
47
-90.5
67
-73.8
87
-38.7
28
-97.3
48
-89.9
68
-72.6
88
-36.3
29
-97.1
49
-89.4
69
-71.3
89
-33.8
30
-96.8
50
-88.8
70
-70.0
90
-31.2
31
-96.6
51
-88.2
71
-68.0
91
-28.5
32
-96.3
52
-87.5
72
-67.0
92
-25.7
33
-96.1
53
-86.8
73
-65.7
93
-22.8
34
-95.8
54
-86.1
74
-64.2
94
-19.8
35
-95.5
55
-85.4
75
-62.6
95
-16.8
36
-95.2
56
-84.6
76
-61.0
96
-13.6
37
-94.8
57
-83.8
77
-59.3
97
-10.4
38
-94.5
58
-83.0
78
-57.5
98
-7.0
39
-94.1
59
-82.1
79
-55.7
99
-3.6
Note: 1 standard atmospheric pressure 1.01325 x 105Pa＝101.325Kpa
Meanwhile, the control unit mainly realizes automation of the process, namely automatic dehydration. The automatic dewatering system mainly automatically controls the liquid level height and the vacuum degree to be kept unchanged without manual adjustment. The liquid level control method is as follows: when the liquid level of oil in the vacuum tank changes, the liquid level sensor transmits collected signals to the controller through the signal input module, the controller performs data processing through the data processing module, then the signal output module can send two paths of control signals to respectively act on the first flow-adjustable pump set and the second flow-adjustable pump set, the input amount or the output amount of the pump is adjusted, and the liquid level is maintained at a set height (a certain space is kept above the liquid level). Because the system adopts the simultaneous control of the oil inlet path and the oil return path, the response speed is higher, and the requirement of quick response is met. On the other hand, the in-process temperature of fluid at vacuum atomization (vacuum atomization, because the vaporization condition of fluid and water is different, under high temperature and vacuum combined action, can make the water in the fluid take place the vaporization, accomplish vacuum atomization promptly) can produce certain change, and the change of temperature then can influence the vacuum size to influence dehydration effect. Specifically, as the temperature increases, the vacuum increases, and as the temperature decreases, the vacuum decreases. Therefore, when the vacuum degree in the tank is changed, the dehydration performance is affected to some extent. Therefore, the temperature sensor is arranged in the vacuum tank, when the temperature of the oil changes, the temperature sensor inputs signals into the controller through the signal input module, the controller performs data processing through the data processing module and outputs corresponding current signals through the signal output module to act on the proportional electromagnet in the proportional throttle valve to control the valve port opening of the proportional throttle valve, so that the vacuum degree is kept to be matched with the temperature of the oil, the vaporization condition of water in the oil is achieved, the water is discharged through the vacuum pump, and the aim of oil dehydration is achieved.
According to the oil vacuum automatic dehydration system provided by the invention, oil is heated to 65-80 ℃ through the circulating unit; then the oil liquid sucked into the vacuum tank through the first adjustable flow pump set is sprayed out through the spray head, the heated high-temperature oil liquid is under the action of negative pressure in the vacuum tank, water in the oil liquid is removed by utilizing the principle of water vaporization under the conditions of negative pressure and high temperature, the water in the oil liquid is vaporized and sucked out by the vacuum pump, the remaining oil liquid returns to the vacuum tank and enters the oil liquid tank through the second adjustable flow pump set, and the oil liquid water removal process is completed. Meanwhile, the control unit automatically controls the vacuum degree in the vacuum tank to be matched with the temperature of water vaporization through a vacuum degree sensor, a liquid level sensor, a temperature sensor, a first adjustable flow pump set, a second adjustable flow pump set and a proportional throttle valve. Namely, the vacuum degree in the vacuum tank is lower than the corresponding vacuum degree when the water is boiled at the oil temperature, so as to achieve the vaporization condition of the water in the oil. Therefore, the oil-liquid separation is high in efficiency, and the water content of the treated oil liquid is low; moreover, the automatic dewatering device is high in automation degree and high in efficiency, and oil liquid is more simply and quickly dewatered.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.