A device for effectively reducing and controlling the corrosion rate of fire water pipes

Abstract

The application provides a device for effectively reducing and controlling the corrosion rate of a fire-fighting water pipeline, a first liquid oxygen content tester and a second liquid oxygen content tester are electrically connected with a processor respectively, the processor is electrically connected with a liquid phase circulation valve controller respectively, the liquid phase circulation valve controller is electrically connected with a liquid phase circulation valve, and the liquid phase circulation valve controller is used for controlling the working state of the liquid phase circulation valve, so that the fire-fighting water can be automatically and efficiently and quickly deoxidized, the deoxidization rate of the fire-fighting water is improved, the corrosion rate of the fire-fighting water pipeline is delayed, the risk of corrosion of the fire-fighting equipment and the pipeline is effectively reduced, the fire-fighting speed of the fire-fighting water is improved, and the reliability and the operation life of the fire-fighting facility are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fire-fighting facility reconstruction, and particularly relates to a device for effectively reducing and controlling the corrosion rate of a fire-fighting water pipeline. BACKGROUND

[0002] Metal corrosion has been a big problem that has puzzled the safe operation of industrial facilities.

[0003] The existence of corrosion problems is universal and hidden, and the damage is progressive and sudden. After decades of research, development and engineering practice, the development of science and technology and industry has laid a solid foundation for the theory of corrosion prevention, and various reliable and effective corrosion prevention engineering techniques and methods have been developed.

[0004] The universal and correct selection of appropriate corrosion prevention engineering techniques and methods can prevent or significantly slow down corrosion damage, and minimize the economic losses and social hazards that may be caused by corrosion. According to estimates, if the existing corrosion prevention engineering techniques are fully utilized, through correct design, material selection, coating and lining, cathodic protection, and the use of corrosion inhibitors, corrosion losses can be reduced by 15% to 30%. For different facilities, appropriate corrosion prevention methods should be adopted, and in some cases, multiple methods should be used in combination.

[0005] Fire prevention measures and fire-fighting facilities are important auxiliary safety facilities outside the main process system of industrial facilities, and are an important part of industrial safety design. Once a fire accident occurs and cannot be effectively controlled, it will directly threaten the safety of personnel and property, and threaten safety or cause nuclear safety accidents, causing adverse public impact.

[0006] With the increase of the running time of the facility or the plant, the corrosion problem of the fire-fighting water pipeline is becoming more and more serious, and the problems such as pipeline blockage and perforation caused by corrosion have become an important problem that has puzzled the power plant. Most of the buried fire-fighting water pipelines use cast iron pipes, and the overhead pipes use galvanized steel pipes. After these pipelines have been in operation for about 5-8 years, a large amount of corrosion products has accumulated on the inner wall of the pipeline, resulting in reduced water flow in the pipeline, blocked downstream nozzles, and direct impact on industrial safety. Therefore, it is crucial to detect problems in a timely manner at the early stage of equipment corrosion and take effective preventive measures to reduce economic losses and prevent accidents.

[0007] The corrosion and blockage of fire water pipeline is a problem with long incubation period and concentrated outbreak. At present, there is no complete and effective treatment method for the corrosion of fire water pipeline in the world. The general treatment countermeasure for the corrosion of fire water pipeline is to replace it when it expires (15-20 years). France is discussing the scheme of replacing part of the carbon steel pipeline with engineering plastic pipeline, and the American Electric Power Research Institute has also issued a guide for the corrosion and blockage evaluation of fire water pipeline, but has not given a final effective solution. A small number of power plants are also trying to treat fire water in order to solve the corrosion problem of fire water pipeline, but the effect of alleviating the blockage of fire water pipeline is not obvious.

[0008] Although the fire water sources, water treatment and water quality management are different, the dissolved oxygen corrosion in water accounts for more than 90% of the corrosion products, and the corrosion products are mainly metal oxides. The oxygen in the dissolved air of fire water oxidizes and corrodes on the surface of metal materials such as pipelines, and the corrosion rate is affected by many factors such as dissolved oxygen content, temperature, flow rate, dissolved salt content and type, water pH (pH) and the like. There are many water systems similar to the fire water system, such as heating systems of industrial and commercial buildings, community winter heating systems, closed cooling systems of nuclear power plants, etc. These systems also have the same corrosion problems as fire fighting systems, and the serious consequences and economic losses are also very obvious. In some cases, obvious corrosion phenomena such as iron rust can be observed in fire water pipeline within one month after commissioning, and leakage may occur after one year. Fire water pipeline will definitely be blocked and leaked within a few years, and regular water supply, rust removal, leakage repair and even replacement are required. Water pressure is often insufficient during use. It is very difficult to find and correct problems during routine facility inspection and pressure test. High cost is required for excavation or high-altitude operation for a leak; and it is found that the oxidation and corrosion occur on the surface of metal materials such as pipelines, and the corrosion rate is most affected by the oxygen content in the fire water. The oxygen enrichment in the fire water also reduces the fire extinguishing speed of the fire water. Therefore, technical problems such as how to automatically and efficiently and quickly deoxidize the fire water and delay the corrosion rate of fire water pipeline and other facilities need to be solved. SUMMARY

[0009] In order to solve the above technical problems, the device for effectively reducing and controlling the corrosion rate of fire water pipeline provided by the present application can automatically and efficiently and quickly deoxidize the fire water, improve the deoxidization rate of the fire water, delay the corrosion rate of the fire water pipeline, effectively reduce the corrosion risk of fire equipment and pipeline, improve the fire extinguishing speed of the fire water, and improve the reliability and service life of the fire fighting facilities.

[0010] In order to achieve the above purpose, the technical scheme of the present application is as follows:

[0011] The application provides a device for effectively reducing and controlling the corrosion rate of a fire-fighting water pipeline, comprising a main circulation pipeline, a membrane contactor arranged on the main circulation pipeline, a membrane contactor liquid inlet and a membrane contactor water outlet connected to the membrane contactor respectively, a first liquid oxygen content tester arranged on the main circulation pipeline connected to the membrane contactor liquid inlet, a second liquid oxygen content tester arranged on the main circulation pipeline connected to the membrane contactor water outlet, a liquid phase circulation valve arranged on the main circulation pipeline, and a processor electrically connected to the first liquid oxygen content tester and the second liquid oxygen content tester respectively, and electrically connected to a liquid phase circulation valve controller, and the liquid phase circulation valve controller is electrically connected to the liquid phase circulation valve and used for controlling the working state of the liquid phase circulation valve.

[0012] The device for effectively reducing and controlling the corrosion rate of a fire-fighting water pipeline can automatically and efficiently and quickly deoxidize the fire-fighting water, improves the deoxidization rate of the fire-fighting water, delays the corrosion rate of the fire-fighting water pipeline, effectively reduces the corrosion risk of the fire-fighting equipment and pipeline, improves the fire-fighting speed of the fire-fighting water, and improves the reliability and service life of the fire-fighting facilities.

[0013] As a preferred technical solution, the main circulation pipeline comprises a liquid inlet pipeline, a first deoxidized liquid transmission pipeline and a liquid phase circulation pipeline, one end of the liquid inlet pipeline is connected to the liquid inlet, the other end of the liquid inlet pipeline is connected to the membrane contactor liquid inlet, the first liquid oxygen content tester is arranged on the liquid inlet pipeline, the membrane contactor water outlet is connected to the first deoxidized liquid transmission pipeline, the second liquid oxygen content tester is arranged on the first deoxidized liquid transmission pipeline, the liquid inlet pipeline is connected to one end of the liquid phase circulation pipeline through a liquid phase inlet, the other end of the liquid phase circulation pipeline is connected to the first deoxidized liquid transmission pipeline, and the liquid phase circulation pipeline is connected with a liquid phase circulation valve.

[0014] As a preferred technical solution, the auxiliary circulation pipeline comprises a vacuum pump cooling water pipeline and a vacuum pumping pipeline, one end of the vacuum pump cooling water pipeline is connected to the first deoxidized liquid transmission pipeline, the other end of the vacuum pump cooling water pipeline is connected to a vacuum pump, a cooling water valve is arranged on the vacuum pump cooling water pipeline, the cooling water valve and the vacuum pump are matched with each other to realize the negative pressure state in the vacuum pump, and the gas-liquid mixture is input into a reflux tank, and the reflux tank is in an open structure.

[0015] As a preferred technical solution, the membrane contactor is provided with a membrane filament, one end of the inner cavity of the membrane filament is connected with the liquid inlet of the membrane contactor, the other end of the inner cavity of the membrane filament is connected with the water outlet of the membrane contactor, the outer wall of the membrane filament and the membrane contactor form a membrane filament outer cavity, the membrane contactor is connected with a membrane contactor vacuum port, the membrane contactor vacuum port is connected with the membrane filament outer cavity, the membrane contactor vacuum port is connected with the vacuum pump through a vacuum conveying pipeline, and a vacuum gauge, a regulating valve and a needle valve are connected in sequence on the vacuum conveying pipeline from the membrane contactor vacuum port to the vacuum pump.

[0016] As a preferred technical solution, one end of the liquid phase circulation pipeline is connected with the liquid inlet, and the liquid inlet is connected with one end of the water storage tank. A second check valve and a liquid phase circulation valve are connected in sequence on the liquid phase circulation pipeline from the water storage tank to the liquid pipeline after the first deoxidization.

[0017] As a preferred technical solution, the liquid inlet pipeline includes a first liquid inlet pipeline and a second liquid inlet pipeline. One end of the liquid phase circulation pipeline is connected with one end of the first liquid inlet pipeline through the liquid inlet. The other end of the first liquid inlet pipeline is connected with the liquid inlet. The first liquid inlet pipeline is connected with the water storage tank through the liquid inlet. The first liquid inlet pipeline is connected with a first liquid inlet valve. One side of the water storage tank is connected with the alkali liquid storage tank through the second liquid inlet pipeline. A first alkali liquid inlet valve, a pH adjusting pump and a second alkali liquid inlet valve are connected in sequence on the second liquid inlet pipeline from the alkali liquid storage tank to the water storage tank. The liquid pH detector is electrically connected with the processor. The processor is electrically connected with the pH adjusting pump controller. The pH adjusting pump controller is electrically connected with the pH adjusting pump. The pH adjusting pump controller is used to control the working state of the pH adjusting pump.

[0018] As a preferred technical solution, the liquid inlet pipeline includes a third liquid inlet pipeline. The other side of the water storage tank is connected with the liquid inlet of the membrane contactor through the third liquid inlet pipeline. A system water inlet valve, a liquid conveying pump, a flow rate control valve, a first liquid oxygen content tester, an inlet pressure gauge of a safety filter, a safety filter and a corrosion rate control component of fire water are connected in sequence on the third liquid inlet pipeline from the water storage tank to the liquid inlet of the membrane contactor. The water storage tank is connected with a water storage tank liquid level sensor. The water storage tank liquid level sensor is electrically connected with the processor. The processor is electrically connected with the first liquid inlet valve controller. The first liquid inlet valve controller is electrically connected with the first liquid inlet valve. The first liquid inlet valve controller is used to control the working state of the first liquid inlet valve.

[0019] As an optimal technical solution, the corrosion rate control component of the fire-fighting water includes: a liquid pH detector, a liquid temperature detector, a liquid conductivity detector, a liquid flow rate detector and a safety filter outlet pressure gauge. The liquid pH detector, the liquid temperature detector, the liquid conductivity detector, the liquid flow rate detector and the safety filter outlet pressure gauge are respectively electrically connected to a data recording and conversion instrument, and the data recording and conversion instrument is electrically connected to a processor.

[0020] As an optimal technical solution, a first liquid pressure gauge is connected to the first deoxygenated liquid transmission pipeline, and the first liquid pressure gauge and the security filter outlet pressure gauge are electrically connected to the processor respectively, and the processor is electrically connected to the liquid flow rate control valve controller, and the liquid flow rate control valve controller is electrically connected to the liquid flow rate control valve, and the liquid flow rate valve controller is used to control the working state of the liquid flow rate control valve.

[0021] As an optimal technical solution, the auxiliary circulation pipeline includes: a first reflux pipe and a second reflux pipe, the vacuum pump is connected to the reflux tank through the first reflux pipe, the reflux tank is connected to the other end of the liquid phase circulation pipe through the second reflux pipe, and the third reflux pipe from the reflux tank to the liquid phase circulation pipe is connected in sequence with a reflux pump, a reflux valve and a first check valve.

[0022] The device provided by the present invention for effectively reducing and controlling the corrosion rate of fire-fighting water pipes has the following beneficial effects:

[0023] (1) The device provided by the present invention effectively reduces and controls the corrosion rate of fire-fighting water pipes, and can automatically, efficiently, and quickly remove oxygen, thereby improving the deoxygenation rate of fire-fighting water, reducing metal corrosion inside the pipes, saving costs, and extending service life. It effectively reduces the risk of corrosion of fire-fighting equipment and pipes, thereby improving the fire-fighting water extinguishing speed and improving the reliability and operating life of fire-fighting facilities.

[0024] (2) The device provided by the present invention effectively reduces and controls the corrosion rate of fire water pipes, occupies a small area, has low energy consumption, is modularly installed, and can perform deoxidation treatment without the need for large-scale equipment, further reducing operating conditions;

[0025] (3) The device provided by the present invention effectively reduces and controls the corrosion rate of fire water pipes. The first liquid oxygen content tester and the second liquid oxygen content tester are provided to automatically detect the oxygen content in the fire water. At the same time, an automatic control system is introduced for control, which is accurate and convenient, improves efficiency, reduces labor costs, and reduces maintenance costs.

[0026] (4) The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0027] (5) The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0028] (6) The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption; BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0030] Figure 2 The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0031] Figure 3 The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0032] Figure 4 The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0033] Figure 5 The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0034] Figure 6 The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0035] Figure 7 The device provided by the application can effectively reduce and control the corrosion rate of the fire-fighting water pipeline, and can automatically and efficiently remove oxygen quickly, thereby improving the deoxidization rate of the fire-fighting water, reducing the corrosion rate of the fire-fighting water pipeline by 90%-95%, and reducing energy consumption;

[0036] 1 - inlet pipe; 2 - membrane contactor; 3 - inlet of membrane contactor; 4 - outlet of membrane contactor; 5 - first liquid oxygen content tester; 6 - corrosion rate control component of fire water; 7 - inlet; 8 - first liquid after deoxidization transmission pipe; 9 - second liquid oxygen content tester; 10 - liquid pH detector; 11 - liquid temperature detector; 12 - liquid conductivity detector; 13 - liquid flow rate detector; 14 - data record converter; 15 - processor; 16 - vacuum pump; 17 - first liquid pressure gauge; 18 - cooling water valve; 20 - liquid level sensor of water storage tank; 21 - vacuum inlet of membrane contactor; 22 - vacuum transmission pipe; 23 - vacuum degree gauge; 24 - regulating valve; 25 - needle valve; 26 - first return pipe; 27 - return tank; 28 - second return pipe; 29 - return pump; 30 - return valve; 31 - first check valve; 32 - liquid level sensor of return tank; 33 - liquid phase circulation pipe; 34 - liquid phase inlet; 35 - water storage tank; 36 - liquid phase circulation valve; 37 - second check valve; 38 - first inlet pipe; 39 - first inlet valve; 40 - second inlet pipe; 41 - alkali storage tank; 42 - first alkali inlet valve; 43 - pH adjusting pump; 44 - second alkali inlet valve; 45 - third inlet pipe; 46 - system water inlet valve; 47 - liquid transmission pump; 48 - flow rate control valve; 49 - inlet pressure gauge of safety filter; 50 - safety filter; 51 - outlet pressure gauge of safety filter; 52 - vacuum pump cooling water pipe. DETAILED DESCRIPTION

[0037] It should be noted that the terms "first", "second" and "third" are used to define the components only for the convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the protection scope of the present application.

[0038] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0039] It can be understood that the present application is achieved by some embodiments to achieve the purpose of the present application, the present application provides an effective means for reducing and controlling the corrosion rate of fire water pipeline, comprising: membrane contactor 2, the membrane contactor 2 is respectively connected with membrane contactor liquid inlet 3 and membrane contactor water outlet 4, one end of the first liquid inlet pipeline 38 is connected with the liquid inlet 7, the first liquid inlet pipeline 38 is connected with the water storage tank 35 through the liquid inlet 34, the first liquid inlet pipeline 38 is connected with the first liquid inlet valve 39; the water storage tank 35 is connected with the alkali storage tank 41 through the second liquid inlet pipeline 40 on one side, the second liquid inlet pipeline 40 from the alkali storage tank 41 to the water storage tank 35 is connected with the first alkali inlet valve 42, the pH adjusting pump 43 and the second alkali inlet valve 44 in turn, the liquid pH detector 10 is electrically connected with the processor, the processor is electrically connected with the pH adjusting pump controller, the pH adjusting pump controller is used for controlling the working state of the pH adjusting pump 43; the water storage tank 35 is connected with the membrane contactor liquid inlet 3 through the third liquid inlet pipeline 45 on the other side, the third liquid inlet pipeline 45 from the water storage tank 35 to the membrane contactor liquid inlet 3 is connected with the system water inlet valve 46, the liquid delivery pump 47, the flow rate control valve 48, the first liquid oxygen content tester 5, the security filter inlet pressure gauge 49, the security filter 50 and the corrosion rate control assembly 6 of fire water in turn, the water storage tank 35 is connected with the water storage tank liquid level sensor, the water storage tank liquid level sensor is electrically connected with the processor, the processor is electrically connected with the first liquid inlet valve controller, the first liquid inlet valve controller is electrically connected with the first liquid inlet valve 39, the first liquid inlet valve controller is used for controlling the working state of the first liquid inlet valve 39; the membrane contactor water outlet 4 is connected with one end of the first deoxygenated liquid transmission pipeline 8, the first deoxygenated liquid transmission pipeline 8 is connected with the second liquid oxygen content tester 9 and the first liquid pressure gauge 17, the liquid inlet pipeline 1 is connected with one end of the liquid phase circulation pipeline 33 through the liquid inlet 34, the other end of the liquid phase circulation pipeline 33 is connected with the first deoxygenated liquid transmission pipeline 8, the liquid phase circulation pipeline 33 is connected with the liquid phase circulation valve 36, one end of the liquid phase circulation pipeline 36 is connected with the liquid inlet 34, the liquid inlet 34 is connected with one end of the water storage tank 35, the liquid phase circulation pipeline 33 from the water storage tank 35 to the second return pipeline 28 is connected with the second check valve 37 and the liquid phase circulation valve 36 in turn, the second check valve 37 prevents the liquid in the water storage tank 35 from flowing back to the liquid phase circulation pipeline 33; one end of the liquid phase circulation pipeline 33 is connected with the other end of the first liquid inlet pipeline 38 through the liquid inlet 34 to form a main circulation pipeline, the first liquid oxygen content tester 5 and the second liquid oxygen content tester 9 are electrically connected with the processor respectively, the processor is electrically connected with the liquid phase circulation valve controller respectively, the liquid phase circulation valve controller is used for controlling the working state of the liquid phase circulation valve 36;The corrosion rate control assembly 6 of the fire-fighting water comprises a liquid pH detector 10, a liquid temperature detector 11, a liquid conductivity detector 12, a liquid flow rate detector 13 and a security filter outlet pressure gauge 51, the liquid pH detector 10, the liquid temperature detector 11, the liquid conductivity detector 12, the liquid flow rate detector 13 and the security filter outlet pressure gauge 51 are electrically connected with a data recording converter 14, the data recording converter 14 is electrically connected with a processor 15, the first liquid pressure gauge 17 and the security filter outlet pressure gauge 51 are electrically connected with the processor, the processor is electrically connected with a liquid flow rate control valve controller, the liquid flow rate control valve controller is electrically connected with a liquid flow rate control valve 48, the liquid flow rate valve controller is used for controlling the working state of the liquid flow rate control valve 48, one end of a first deoxygenated liquid transmission pipeline 8 is connected with a vacuum pump cooling water pipeline 53, the other end of the vacuum pump cooling water pipeline 53 is connected with a vacuum pump 16, a cooling water valve 18 is connected on the vacuum pump cooling water pipeline 53, a membrane filament is arranged in the membrane contactor 2, one end of the inner cavity of the membrane filament is connected with a membrane contactor liquid inlet 3, the other end of the inner cavity of the membrane filament is connected with a membrane contactor water outlet 4, a membrane filament outer cavity is formed between the outer wall of the membrane filament and the membrane contactor 2, a membrane contactor vacuum outlet 21 is connected on the membrane contactor 2, the membrane contactor vacuum outlet 21 is connected with the membrane filament outer cavity, the membrane contactor vacuum outlet 21 is connected with the vacuum pump 16 through a vacuum conveying pipeline 22, a vacuum degree gauge 23, an adjusting valve 24 and a needle valve 25 are connected on the vacuum conveying pipeline 22 from the membrane contactor vacuum outlet 21 to the vacuum pump 16 in sequence, the membrane filament in the membrane contactor 2 is subjected to surface hydrophobic treatment and has one-way selectivity, i.e. air permeable but water impermeable, the membrane filament inner and outer sides form a gas pressure difference by controlling the vacuum negative pressure of the vacuum pump 16, oxygen in the fire-fighting water in the membrane filament inner cavity permeates the membrane filament surface micropores and enters the membrane filament outer cavity, so that the oxygen in the fire-fighting water can be removed, but due to the pressure difference between the membrane filament inner and outer sides, the oxygen cannot re-enter the membrane filament inner cavity, the water from which the oxygen is removed can only flow in the membrane filament inner cavity due to surface tension and cannot enter the membrane filament outer cavity, the water from which the oxygen is removed mainly enters a liquid phase circulation pipeline 33, the deoxygenated cooling water is transported into a reflux tank 27 through the first deoxygenated liquid transmission pipeline 8, the vacuum pump cooling water pipeline 52 and a first reflux pipeline 26 in sequence, the deoxygenated liquid transported by an auxiliary circulation pipeline is deoxygenated cooling water, so that the vacuum pump 16 can be cooled, the deoxygenated cooling water and the heat generated by the working of the vacuum pump 16 are matched with each other for cold and heat exchange, so that the negative pressure state in the vacuum pump 16 can be realized, and the gas-liquid mixture is input into the reflux tank, the reflux tank 27 is of an open structure, the gas in the gas-liquid mixture is discharged from the opening and does not need additional operation, the needle valve 25 avoids damage to the membrane contactor 2 caused by sudden gas pressure increase, and the adjusting valve 24 is used for adjusting the vacuum negative pressure to reach a preset threshold value.The vacuum pump 16 is connected with the backflow tank 27 through the first backflow pipeline 26, the backflow tank 27 is connected with the other end of the liquid phase circulation pipeline 33 through the second backflow pipeline 28, and the backflow pump 29, the backflow valve 30 and the first check valve 31 are sequentially connected on the second backflow pipeline 28 from the backflow tank 27 to the liquid phase circulation pipeline 33; the backflow tank 27 is provided with a backflow tank liquid level sensor, the backflow tank liquid level sensor is electrically connected with the processor, the processor is electrically connected with the controller, the controller is electrically connected with the backflow pump 29, the backflow valve 30, the cooling water valve 18 and the vacuum pump 16 respectively, and the controller is used for controlling the working states of the backflow pump 29, the backflow valve 30, the cooling water valve 18 and the vacuum pump 16 respectively; in this way, the deoxidation treatment of the fire-fighting water can be automatically, efficiently and quickly performed, the deoxidation rate of the fire-fighting water is improved, the corrosion rate of the fire-fighting water pipeline is delayed, the risk of corrosion of the fire-fighting equipment and pipeline is effectively reduced, the fire-fighting speed of the fire-fighting water is improved, and the reliability and operation life of the fire-fighting facility are improved.

[0040] The device for effectively reducing and controlling the corrosion rate of the fire-fighting water pipeline provided by the application controls the opening of the first water inlet valve 39, and after water is transported into the water storage tank 35 through the first liquid inlet pipeline 38, the water storage tank liquid level sensor 20 is electrically connected with the processor, the processor is electrically connected with the first liquid inlet valve controller, the first liquid inlet valve controller is electrically connected with the first liquid inlet valve 39, and the first liquid inlet valve controller is used for controlling the working state of the first liquid inlet valve 39. Figure 2 When the inner liquid level of the water storage tank 35 is lower than LAL-1, the water storage tank liquid level sensor detects the signal that the inner liquid level of the water storage tank 35 is lower than the water level LAL-1, sends the signal that the inner liquid level of the water storage tank 35 is lower than the water level LAL-1 to the processor, the processor detects the signal, processes the signal, and sends the data that the inner liquid level of the water storage tank is lower than the water level LAL-1 to the first liquid inlet valve controller, and the first liquid inlet valve controller receives the data that the inner liquid level of the water storage tank 35 is lower than the water level LAL-1 and controls the opening of the first liquid inlet valve 39 until the inner liquid level of the water storage tank 35 is higher than LAH-1.

[0041] When the liquid level in the water storage tank 35 is higher than LAH-1, the water storage tank liquid level sensor 20 detects a signal that the liquid level in the water storage tank 35 is higher than the water level LAL-1, and sends a signal that the liquid level in the water storage tank 35 is higher than the water level LAL-1 to the processor, the processor detects the signal, processes the signal, and transmits data that the liquid level in the water storage tank 35 is higher than the water level LAL-1 to the first liquid inlet valve controller, the first liquid inlet valve controller receives the data that the liquid level in the water storage tank 35 is higher than the water level LAL-1 and controls the first liquid inlet valve 39 to be closed, the first liquid inlet valve 39 stops working, which avoids manual inspection of the liquid level in the water storage tank, realizes automatic control of the working state of the first water inlet valve 39 according to the liquid level in the water storage tank 35, and not only saves labor cost, but also improves production effect;

[0042] The preset oxygen concentration standard value of the fire-fighting water is an oxygen content threshold of the fire-fighting water, and the preset pH threshold of the fire-fighting water is 10-13, which further reduces the risk of corrosion of the fire-fighting equipment and pipelines;

[0043] When the liquid level in the water storage tank 35 is between LAL-1 and LAH-2, the fire-fighting water in the water storage tank 35 is transported into the membrane contactor liquid inlet 3 through the liquid transport pump 47, and then into the membrane filament lumen, as shown in Figure 5 The liquid pH detector 10 is electrically connected with the processor, the processor is electrically connected with the pH adjusting pump controller, the pH adjusting pump controller is electrically connected with the pH adjusting pump 43, and the pH adjusting pump controller is used to control the working state of the pH adjusting pump 43. When the actual pH value of the fire-fighting water is less than the pH threshold of the fire-fighting water, the liquid pH detector detects a signal that the actual pH value of the fire-fighting water is less than the pH threshold of the fire-fighting water, and sends a signal that the actual pH value of the fire-fighting water is less than the pH threshold of the fire-fighting water to the processor. The processor detects the signal, processes the signal, and transmits data that the actual pH value of the fire-fighting water is less than the pH threshold of the fire-fighting water to the pH adjusting pump controller. The pH adjusting pump controller receives the data that the actual pH value of the fire-fighting water is less than the pH threshold of the fire-fighting water and controls the pH adjusting pump 43 to be opened and work. The pH value of the fire-fighting water in the water storage tank 35 is automatically adjusted by the alkali in the alkali storage tank 41 until the pH threshold of the fire-fighting water is reached, which further reduces the risk of corrosion of the fire-fighting equipment and pipelines;

[0044] As Figure 3As shown, the first liquid oxygen content tester 5 and the second liquid oxygen content tester 9 are respectively electrically connected with the processor, and the processor is respectively electrically connected with the liquid phase circulating valve controller for controlling the working state of the liquid phase circulating valve 36. When the actual value of the oxygen content of the firefighting water in the third liquid inlet pipeline 45 is greater than the oxygen content threshold value of the firefighting water, and the actual value of the oxygen content of the deoxygenated liquid in the first deoxygenated liquid transmission pipeline 8 is greater than the oxygen content threshold value of the firefighting water, the first liquid oxygen content tester 5 detects the signal that the actual value of the oxygen content of the firefighting water in the third liquid inlet pipeline 45 is greater than the oxygen content threshold value of the firefighting water, the second liquid oxygen content tester 9 detects the signal that the actual value of the oxygen content of the deoxygenated liquid in the first deoxygenated liquid transmission pipeline 8 is greater than the oxygen content threshold value of the firefighting water, and sends the two signals to the processor. The processor detects the signals, processes the signals, and sends the two signals to the vacuum pump controller. The liquid phase circulating valve controller receives the two signals and controls the opening of the liquid phase circulating valve 36 to work, and performs the circulating deoxygenation mode processing. The vacuum pump 16 is opened, and the vacuum pump 16 generates negative pressure in the outer cavity of the membrane filament in the membrane contactor 2 through the vacuum conveying pipeline 22, so that the gas pressure difference between the inner side and the outer side of the membrane filament is generated. The membrane filament has one-way selectivity after the surface hydrophobic treatment, that is, it is breathable but not water-permeable. Due to the gas pressure difference between the inner side and the outer side of the membrane filament, the oxygen in the firefighting water in the inner cavity of the membrane filament penetrates into the outer cavity of the membrane filament through the micropores on the surface of the membrane filament, and the deoxygenated firefighting water is sequentially conveyed through the membrane contactor water outlet 4, the first deoxygenated liquid transmission pipeline 8, the vacuum pump cooling water pipeline 52, and the first return pipeline 26 into the return tank 27. The deoxygenated cooling water and the heat generated by the working of the vacuum pump 16 are mutually matched for cold and heat exchange to realize the negative pressure state in the vacuum pump 16, and the gas-liquid mixture is input into the return tank. The return tank 27 is an open structure, and the gas in the gas-liquid mixture is discharged from the opening without additional operation.The liquid in the gas-liquid mixture stays in the reflux tank 27, and the deoxygenated cooling water in the reflux tank 27 is transmitted to the liquid phase circulation pipeline 33 through the second reflux pipeline 28, and then transmitted into the water storage tank 35 through the liquid phase circulation pipeline 33 and the liquid phase inlet 34, and the above-mentioned deoxygenation step of the fire-fighting water is circulated until the actual value of the oxygen content of the deoxygenated fire-fighting water in the third liquid inlet pipeline 45 is less than the threshold value of the oxygen content of the fire-fighting water, and the actual value of the oxygen content of the deoxygenated liquid in the first deoxygenated liquid transmission pipeline 8 is less than the threshold value of the oxygen content of the fire-fighting water;

[0045] As shown in Figure 6 The reflux tank 27 is provided with a reflux tank liquid level sensor 32, the reflux tank liquid level sensor 32 is electrically connected with the processor, the processor is electrically connected with the controller, the controller is respectively electrically connected with the reflux pump 29, the reflux valve 30, the cooling water valve 18 and the vacuum pump 16, and the controller is used for controlling the working states of the reflux pump 29, the reflux valve 30, the cooling water valve 18 and the vacuum pump 16 respectively; when the reflux tank liquid level sensor detects that the water level of the reflux tank 27 is lower than the LAL-2 water level, the controller controls to close the working states of the reflux pump 29 and the reflux valve 30; when the reflux tank liquid level sensor detects that the water level of the reflux tank is between the LAL-2 water level and the LAH-2 water level, the controller controls to open the working states of the reflux pump 29 and the reflux valve 30; when the reflux tank liquid level sensor 32 detects that the water level of the reflux tank 27 is higher than the LAH-2 water level, the controller controls to close the vacuum pump 16 and the cooling water valve 18;

[0046] When the actual value of the oxygen content of the deoxygenated fire-fighting water in the third liquid inlet pipeline 45 is less than the threshold value of the oxygen content of the fire-fighting water, the actual value of the oxygen content of the deoxygenated liquid in the first deoxygenated liquid transmission pipeline 8 is less than the threshold value of the oxygen content of the fire-fighting water, the first liquid oxygen content tester 5 detects a signal that the actual value of the oxygen content of the deoxygenated fire-fighting water in the third liquid inlet pipeline 45 is less than the threshold value of the oxygen content of the fire-fighting water, the second liquid oxygen content tester 9 detects a signal that the actual value of the oxygen content of the deoxygenated liquid in the first deoxygenated liquid transmission pipeline 8 is less than the threshold value of the oxygen content of the fire-fighting water, and sends the signals to the processor respectively, the processor detects the signals, processes the signals, and sends data that the actual value of the oxygen content of the deoxygenated fire-fighting water in the third liquid inlet pipeline 45 is less than the threshold value of the oxygen content of the fire-fighting water and the actual value of the oxygen content of the deoxygenated liquid in the first deoxygenated liquid transmission pipeline 8 is less than the threshold value of the oxygen content of the fire-fighting water to the liquid phase circulation valve controller, the liquid phase circulation valve controller receives the data and controls the liquid phase circulation valve 36 to stop working, closes the entire device, and stores the deoxygenated fire-fighting water with the oxygen content meeting the standard in the water storage tank 35 for standby use; the first check valve 31 is connected to the second return pipeline 28 to prevent the liquid in the liquid phase circulation pipeline 33 from flowing back to the second return pipeline 28, and the second check valve 37 is connected to the liquid phase circulation pipeline 33 to prevent the liquid in the water storage tank 35 from flowing back to the liquid phase circulation pipeline 33;

[0047] The security filter inlet pressure gauge 49 and the security filter outlet pressure gauge 51 are arranged to determine whether the security filter 50 is blocked. When the value of the security filter inlet pressure gauge 49 is greatly different from the value of the security filter outlet pressure gauge 51, it is determined that the security filter 50 is blocked, which facilitates the operator to clean the security filter in time.

[0048] As Figure 4As shown, the corrosion rate control assembly of the fire-fighting water comprises a liquid pH detector 10, a liquid temperature detector 11, a liquid conductivity detector 12, a liquid flow rate detector 13 and a security filter outlet pressure gauge 51, which are electrically connected with a data recording converter 14, and the data recording converter 14 is electrically connected with a processor; the liquid pH detector 10 detects the pH value data signal of the liquid entering the membrane contactor, the liquid temperature detector 11 detects the temperature data signal of the liquid entering the membrane contactor, the liquid conductivity detector 12 detects the conductivity data signal of the liquid entering the membrane contactor, the liquid flow rate detector 13 detects the liquid flow rate data signal of the liquid entering the membrane contactor, and the security filter outlet pressure gauge 51 detects the liquid pressure data signal of the liquid entering the membrane contactor, and sends the data signals to the data recording converter 14, respectively; the data recording converter 14 detects the signals, processes the signals and sends the data to the processor 15, the processor 15 draws a corrosion rate curve of the fire-fighting water according to the received data, the corrosion rate curve of the fire-fighting water can conveniently and intuitively feedback the corrosion rate of the fire-fighting water, and the corrosion rate curve of the fire-fighting water can provide a reference for controlling the corrosion rate of the fire-fighting water as a parameter for adjusting the fire-fighting water.

[0049] As shown in the figure, Figure 7 As shown, the first liquid pressure gauge 17 and the security filter outlet pressure gauge 51 are electrically connected with the processor, the processor is electrically connected with a liquid flow rate control valve controller, the liquid flow rate control valve controller is electrically connected with the liquid flow rate control valve 48, the liquid flow rate valve controller is used for controlling the working state of the liquid flow rate control valve 48, the security filter outlet pressure gauge 51 detects the pressure actual value of the membrane contactor liquid inlet 3, and the first liquid pressure gauge 17 detects the pressure actual value of the membrane contactor water outlet 4, and sends the pressure actual values of the membrane contactor liquid inlet 3 and the membrane contactor water outlet 4 to the processor, respectively; when any one of the pressure actual values exceeds the preset pressure threshold value, the liquid flow rate valve controller controls to reduce the opening degree of the liquid flow rate control valve 48, reduces the liquid flow rate, avoids the penetration of the membrane contactor 2 and improves the safety of the device.

[0050] The device for effectively reducing and controlling the corrosion rate of the fire-fighting water pipeline has the following beneficial effects:

[0051] (1) The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipeline provided by the application can automatically and efficiently remove oxygen, improve the oxygen removal rate of fire-fighting water, reduce internal metal corrosion of the pipeline, save costs, prolong the service life, effectively reduce the corrosion risk of fire-fighting equipment and pipeline, improve the fire-fighting speed of fire-fighting water, and improve the reliability and service life of fire-fighting facilities;

[0052] (2) The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipeline provided by the application has small occupation and low energy consumption, is modularly installed, and can be subjected to oxygen removal treatment without large equipment, thereby further reducing the operation condition;

[0053] (3) The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipeline provided by the application can automatically detect the oxygen content in fire-fighting water through the first liquid oxygen content tester and the second liquid oxygen content tester, and can be controlled by an automatic control system, thereby being accurate and convenient, improving efficiency, reducing labor costs, and reducing maintenance costs;

[0054] (4) The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipeline provided by the application can automatically and efficiently remove oxygen, improve the oxygen removal rate of fire-fighting water, reduce the corrosion rate of fire-fighting water pipeline by 90%-95%, and reduce energy consumption;

[0055] (5) The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipeline provided by the application does not need to make large changes to the existing fire-fighting system, especially the pipeline system, only needs to make simple modification at the end of the fire-fighting water pool, does not affect the original design of the fire-fighting system, and improves the safety and reliability;

[0056] (6) The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipeline provided by the application can delay corrosion and eliminate the breeding of bacteria, algae, mosquitoes and other organisms in the fire-fighting water pool, and optimize the quality of fire-fighting water.

[0057] It is to be understood that the present application is described by way of example only, and that modifications or alterations can be made to the features and embodiments described without departing from the spirit and scope of the application. In addition, modifications can be made to the features and embodiments described to adapt them to particular situations and materials without departing from the spirit and scope of the application. Accordingly, the present application is not limited to the specific embodiments described herein, but rather only by the claims which follow, all variations and equivalents which fall within the ranges of the claims being intended to be embraced herein.

Claims

1. A device for effectively reducing and controlling the corrosion rate of fire-fighting water pipes, characterized in that: include: A main circulation pipeline, wherein a membrane contactor is provided on the main circulation pipeline, and the membrane contactor is respectively connected to a membrane contactor liquid inlet and a membrane contactor water outlet which are arranged opposite to each other, a first liquid oxygen content tester is provided on the main circulation pipeline connected to the membrane contactor liquid inlet, and a second liquid oxygen content tester is provided on the main circulation pipeline connected to the membrane contactor water outlet, and a liquid phase circulation valve is provided on the main circulation pipeline, the first liquid oxygen content tester and the second liquid oxygen content tester are respectively electrically connected to a processor, the processor is respectively electrically connected to a liquid phase circulation valve controller, the liquid phase circulation valve controller is electrically connected to the liquid phase circulation valve, and the liquid phase circulation valve controller is used to control the working state of the liquid phase circulation valve; The main circulation pipeline includes: a liquid inlet pipeline, a first deoxygenated liquid transmission pipeline and a liquid phase circulation pipeline, one end of the liquid inlet pipeline is connected to the liquid inlet, and the other end of the liquid inlet pipeline is connected to the liquid inlet of the membrane contactor, the first liquid oxygen content tester is arranged on the liquid inlet pipeline, the water outlet of the membrane contactor is connected to the first deoxygenated liquid transmission pipeline, the second liquid oxygen content tester is arranged on the first deoxygenated liquid transmission pipeline, the liquid inlet pipeline is connected to one end of the liquid phase circulation pipeline through a liquid phase inlet, the other end of the liquid phase circulation pipeline is connected to the first deoxygenated liquid transmission pipeline, and the liquid phase circulation pipeline is connected to a liquid phase circulation valve; Auxiliary circulation pipeline, the auxiliary circulation pipeline includes: a vacuum pump cooling water pipeline and a vacuum delivery pipeline, one end of the vacuum pump cooling water pipeline is connected to the first deoxygenated liquid delivery pipeline, the other end of the vacuum pump cooling water pipeline is connected to the vacuum pump, the vacuum pump cooling water pipeline is connected to a cooling water valve, the cooling water valve and the vacuum pump cooperate with each other to exchange heat and cold to achieve a negative pressure state in the vacuum pump, and input the gas-liquid mixture into the reflux tank, the reflux tank is an open structure, and the reflux tank is connected to one end of the liquid phase circulation pipeline through a second reflux pipeline; One end of the liquid phase circulation pipeline is connected to the liquid phase inlet, and the liquid phase inlet is connected to one end of the water tank. The second check valve and the liquid phase circulation valve are sequentially connected to the liquid phase circulation pipeline from the water tank to the first deoxygenated liquid transmission pipeline.

2. The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipes according to claim 1 is characterized in that: The membrane contactor is provided with a membrane wire, one end of the inner cavity of the membrane wire is connected to the liquid inlet of the membrane contactor, and the other end of the inner cavity of the membrane wire is connected to the water outlet of the membrane contactor. A membrane wire outer cavity is formed between the outer wall of the membrane wire and the membrane contactor. The membrane contactor is connected to a membrane contactor vacuum port, and the membrane contactor vacuum port is connected to the membrane wire outer cavity. The membrane contactor vacuum port is connected to the vacuum pump through a vacuum conveying pipe, and a vacuum gauge, a regulating valve and a needle valve are connected in sequence to the vacuum conveying pipe from the membrane contactor vacuum port to the vacuum pump.

3. The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipes according to claim 2 is characterized in that: The liquid inlet pipeline includes: a first liquid inlet pipeline and a second liquid inlet pipeline, one end of the liquid phase circulation pipeline is connected to one end of the first liquid inlet pipeline through a liquid phase inlet, the other end of the first liquid inlet pipeline is connected to the liquid inlet, the first liquid inlet pipeline is connected to the water tank through the liquid phase inlet, the first liquid inlet pipeline is connected to a first liquid inlet valve, one side of the water tank is connected to an alkali solution storage tank through a second liquid inlet pipeline, the second liquid inlet pipeline from the alkali solution storage tank to the water tank is sequentially connected to a first alkali solution inlet valve, a pH regulating pump and a second alkali solution inlet valve, the processor is electrically connected to a pH regulating pump controller, the pH regulating pump controller is electrically connected to a pH regulating pump, and the pH regulating pump controller is used to control the working state of the pH regulating pump.

4. The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipes according to claim 3 is characterized in that: The liquid inlet pipeline includes: a third liquid inlet pipeline, the other side of the water tank is connected to the liquid inlet of the membrane contactor through the third liquid inlet pipeline, and the third liquid inlet pipeline from the water tank to the liquid inlet of the membrane contactor is sequentially connected with a system water inlet valve, a liquid delivery pump, a flow rate control valve, a first liquid oxygen content tester, a safety filter inlet pressure gauge, a safety filter and a corrosion rate control component for fire water. The water tank is connected to a water tank liquid level sensor, the water tank liquid level sensor is electrically connected to the processor, the processor is electrically connected to the first liquid inlet valve controller, the first liquid inlet valve controller is electrically connected to the first liquid inlet valve, and the first liquid inlet valve controller is used to control the working state of the first liquid inlet valve.

5. The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipes according to claim 4 is characterized in that: The corrosion rate control component of the fire-fighting water includes: a liquid pH detector, a liquid temperature detector, a liquid conductivity detector, a liquid flow rate detector and a safety filter outlet pressure gauge. The liquid pH detector, the liquid temperature detector, the liquid conductivity detector, the liquid flow rate detector and the safety filter outlet pressure gauge are respectively electrically connected to a data recording and converter, the data recording and converter is electrically connected to a processor, and the liquid pH detector is electrically connected to a processor.

6. The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipes according to claim 4 is characterized in that: A first liquid pressure gauge is connected to the first deoxygenated liquid transmission pipeline. The first liquid pressure gauge and the security filter outlet pressure gauge are electrically connected to the processor respectively. The processor is electrically connected to the liquid flow rate control valve controller. The liquid flow rate control valve controller is electrically connected to the liquid flow rate control valve. The liquid flow rate control valve controller is used to control the working state of the liquid flow rate control valve.

7. The device for effectively reducing and controlling the corrosion rate of fire-fighting water pipes according to claim 2 is characterized in that: The auxiliary circulation pipeline includes: a first reflux pipe and a second reflux pipe. The vacuum pump is connected to the reflux tank through the first reflux pipe, and the second reflux pipe from the reflux tank to the liquid phase circulation pipe is connected in sequence with a reflux pump, a reflux valve and a first check valve.

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