Heat conduction oil leakage detection system for evaporator

Abstract

The utility model discloses a conduction oil leakage detection system for evaporators, which comprises at least one group of multi-effect evaporators and a detection system, each multi-effect evaporator comprises a vacuum pump, a condensate water storage tank, an emergency storage tank, an effect body and a surface condenser, the effect body and the surface condenser are connected through a first pipeline and a second pipeline, and conduction oil is arranged in the first pipeline. To-be-processed liquid is arranged in the second pipeline, the first pipeline is sleeved with the second pipeline, the vacuum pump is connected with the surface condenser through the second pipeline, the condensate water storage tank is connected with the second pipeline through a third pipeline, and the emergency storage tank is connected with the second pipeline through a fourth pipeline; the detection system comprises a negative pressure detection device, a remote controller and a plurality of pneumatic valves, the negative pressure detection device is used for detecting the negative pressure value in the second pipeline, the pneumatic valves comprise a plurality of first pneumatic valves and a plurality of second pneumatic valves, the first pneumatic valves are located on the third pipeline, and the second pneumatic valves are located on the fourth pipeline.

Description

Technical Field

[0001] The utility model relates to a heat transfer oil leakage detection system for an evaporator. Background Art

[0002] The multi-effect evaporator is a high-efficiency equipment used in the evaporation process of liquid mixtures. It improves the thermal efficiency of the entire system by using the steam generated in the previous effect as the heat source for the next effect. This design can significantly reduce the energy required for heating, and can also reduce the consumption of cooling water and the discharge of secondary steam.

[0003] The heat transfer oil heating effect body will cause the shell and tube layer to rupture due to overheating and strong alkali corrosion, causing the heat transfer oil in the tube layer to leak into the liquid alkali, and then enter the condensed water after evaporation, resulting in the alkali product and condensed water containing heat transfer oil. Since the condensed water is used for other processes, the rear equipment will be contaminated by Dow oil, affecting the process. Utility Model Content

[0004] The purpose of the utility model is to solve the above deficiencies in the prior art and provide a heat transfer oil leakage detection system for an evaporator.

[0005] A heat transfer oil leakage detection system for an evaporator, comprising at least one group of multiple-effect evaporators and a detection system, wherein the multiple-effect evaporator comprises a vacuum pump, a condensed water storage tank, an emergency storage tank, and an effect body and a surface condenser connected through a first pipeline and a second pipeline, wherein the first pipeline is provided with heat transfer oil, the second pipeline is provided with a liquid to be processed, the first pipeline is sleeved with the second pipeline, the vacuum pump is connected with the surface condenser through the second pipeline, the condensed water storage tank is connected with the second pipeline through a third pipeline, and the emergency storage tank is connected with the second pipeline through a fourth pipeline;

[0006] The detection system includes a negative pressure detection device, a remote controller, and multiple pneumatic valves. The negative pressure detection device is used to detect the negative pressure value in the second pipeline. The pneumatic valve includes multiple first pneumatic valves and second pneumatic valves. The first pneumatic valve is located in the third pipeline, and the second pneumatic valve is located in the fourth pipeline. The remote controller is used to receive the signal of the negative pressure detection device and control the opening and closing of the first pneumatic valve and the second pneumatic valve.

[0007] Preferably, the multiple groups of multiple-effect evaporators are connected via a fifth pipeline, and the fifth pipeline connects the third pipelines of the multiple groups of multiple-effect evaporators to the same fourth pipeline.

[0008] Preferably, a second pneumatic valve is provided on the fifth pipeline.

[0009] Preferably, the first pneumatic valve or the second pneumatic valve includes a valve body, a valve core, a pneumatic actuator, and a control signal interface. The valve core is movably connected in the valve body, the valve core is used to control the flow of fluid, the pneumatic actuator is used to control the movement of the valve core, and the control signal interface is used to receive an execution signal from a remote controller.

[0010] Preferably, the first pneumatic valve and the second pneumatic valve are provided with a manual operating mechanism.

[0011] Beneficial effect: Compared with the prior art, the utility model monitors the negative pressure value in the second path through the negative pressure detection system. When the negative pressure value is lower than the expected value, a signal is sent to the remote controller, and the remote controller controls the first pneumatic valve to close and the second pneumatic valve to open, so that the condensed water mixed with the heat transfer oil enters the emergency storage tank, thereby preventing the condensed water in the condensed water storage tank from being polluted and affecting the condensation circulation system.

[0012] The negative pressure detection system can promptly detect pipeline rupture that causes the thermal oil to leak into the fluid to be processed, and promptly control the pneumatic valve to prevent the thermal oil from further spreading. The overall structure is simple and has high applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the principle of a thermal oil leakage detection system for an evaporator;

[0014] In the figure, 1, the second pipeline, 2, the effect body, 3, the surface condenser, 4, the fourth pipeline, 5, the emergency storage tank, 6, the condensate storage tank, 7, the third pipeline, 8, the fifth pipeline, 9, the first pneumatic valve, 10, the second pneumatic valve. DETAILED DESCRIPTION

[0015] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0016] like Figure 1 As shown, the second pipeline 1, the effect body 2, the surface condenser 3, the fourth pipeline 4, the emergency storage tank 5, the condensed water storage tank 6, the third pipeline 7, the fifth pipeline 8, the first pneumatic valve 9, and the second pneumatic valve 10;

[0017] A heat transfer oil leakage detection system for an evaporator, comprising at least one set of multiple-effect evaporators and a detection system, wherein the multiple-effect evaporator comprises a vacuum pump, a condensed water storage tank 6, an emergency storage tank 5, and an effect body 2 and a surface condenser 3 connected through a first pipeline and a second pipeline 1, wherein the first pipeline is provided with heat transfer oil, the second pipeline 1 is provided with a liquid to be processed, the first pipeline is sleeved with the second pipeline 1, the vacuum pump is connected with the surface condenser 3 through the second pipeline 1, the condensed water storage tank 6 is connected with the second pipeline 1 through a third pipeline 7, and the emergency storage tank 5 is connected with the second pipeline 1 through a fourth pipeline 4;

[0018] A vacuum pump (not shown) is connected to the surface condenser 3. The vacuum pump forms negative pressure to draw the water vapor in the second pipeline 1 into the surface condenser 3. The water vapor turns into condensed water in the surface condenser 3 and finally enters the condensed water tank.

[0019] The detection system includes a negative pressure detection device, a remote controller, and multiple pneumatic valves. The negative pressure detection device is used to detect the negative pressure value in the second pipeline 1. The pneumatic valves include multiple first pneumatic valves 9 and second pneumatic valves 10. The first pneumatic valve 9 is located in the third pipeline 7, and the second pneumatic valve 10 is located in the fourth pipeline 4. The remote controller is used to receive the signal of the negative pressure detection device and control the opening and closing of the first pneumatic valve 9 and the second pneumatic valve 10; multiple groups of multi-effect evaporators are connected through a fifth pipeline 8, and the fifth pipeline 8 connects the third pipelines 7 of the multiple groups of multi-effect evaporators to the same fourth pipeline 4. The fifth pipeline 8 is provided with a second pneumatic valve 10.

[0020] Specifically, the figure shows two groups of multi-effect evaporator systems, the effects 2 of the two evaporator systems are respectively connected to the condensed water storage tank 6 through a third pipeline 7, the evaporator system on the right side of the figure is connected to the emergency storage tank 5 through the fourth pipeline 4, and the third pipeline 7 on the left side of the figure is connected to the fourth pipeline 4 through the fifth pipeline 8.

[0021] The first pneumatic valve 9 or the second pneumatic valve 10 includes a valve body, a valve core, a pneumatic actuator, and a control signal interface. The valve core is movably connected in the valve body, the valve core is used to control the flow of the fluid, the pneumatic actuator is used to control the movement of the valve core, and the control signal interface is used to receive the execution signal of the remote controller; the first pneumatic valve 9 and the second pneumatic valve 10 are provided with a manual operating mechanism.

[0022] Instructions for use: A heat transfer oil pipeline is provided between the effect body 2 and the surface condenser 3. The heat transfer oil is used to heat the internal alkali solution. When the alkali solution is heated in the effect body 2, due to the high temperature, part of the alkali solution will evaporate to form water vapor. At the same time, negative pressure is formed by the vacuum pump to suck the water vapor in the effect body 2 into the surface cooler. The water vapor forms condensed water in the surface cooler and finally enters the condensed water tank;

[0023] In this process, if the pipe layer of effect body 2 is broken, the heat transfer oil will enter the alkali solution, evaporate along with the alkali solution and enter the surface cooling, so that the heat transfer oil is mixed in the condensed water;

[0024] In order to prevent the condensed water mixed with the heat transfer oil from further spreading and contaminating the clean condensed water, the detection system detects the negative pressure value in the second pipeline 1 through the negative pressure detection device. During normal operation, the negative pressure value formed by the vacuum pump is constant, and the first pneumatic valve 9 is opened, the second pneumatic valve 10 is closed, and the condensed water enters the condensed water tank;

[0025] When the pipeline ruptures and the heat transfer oil leaks, the negative pressure value in the pipeline will change. At this time, the negative pressure detection device detects this change and sends a signal to the remote controller. The remote controller controls the first pneumatic valve 9 to close to prevent contaminated condensate from entering the condensate tank, and the second pneumatic valve 10 to open to allow the contaminated condensate to enter the emergency storage tank 5.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermal oil leakage detection system for an evaporator, characterized in that: It comprises at least one group of multiple-effect evaporators and a detection system, wherein the multiple-effect evaporator comprises a vacuum pump, a condensed water storage tank, an emergency storage tank, and an effect body and a surface condenser connected through a first pipeline and a second pipeline, the first pipeline is provided with heat transfer oil, the second pipeline is provided with a liquid to be processed, the first pipeline is sleeved with the second pipeline, the vacuum pump is connected to the surface condenser through the second pipeline, the condensed water storage tank is connected to the second pipeline through a third pipeline, and the emergency storage tank is connected to the second pipeline through a fourth pipeline; The detection system includes a negative pressure detection device, a remote controller, and multiple pneumatic valves. The negative pressure detection device is used to detect the negative pressure value in the second pipeline. The pneumatic valve includes multiple first pneumatic valves and second pneumatic valves. The first pneumatic valve is located in the third pipeline, and the second pneumatic valve is located in the fourth pipeline. The remote controller is used to receive signals from the negative pressure detection device and control the opening and closing of the first pneumatic valve and the second pneumatic valve.

2. A thermal oil leakage detection system for an evaporator according to claim 1, characterized in that: The multiple groups of multiple-effect evaporators are connected via a fifth pipeline, and the fifth pipeline connects the third pipelines of the multiple groups of multiple-effect evaporators to the same fourth pipeline.

3. A thermal oil leakage detection system for an evaporator according to claim 2, characterized in that: The fifth pipeline is provided with a second pneumatic valve.

4. The thermal oil leakage detection system for evaporator according to claim 1, characterized in that: The first pneumatic valve or the second pneumatic valve includes a valve body, a valve core, a pneumatic actuator, and a control signal interface. The valve core is movably connected in the valve body, the valve core is used to control the flow of fluid, the pneumatic actuator is used to control the movement of the valve core, and the control signal interface is used to receive an execution signal from a remote controller.

5. A thermal oil leakage detection system for an evaporator according to claim 4, characterized in that: The first pneumatic valve and the second pneumatic valve are provided with a manual operating mechanism.

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